From 84c80ffc39f1e2f463e7039367735efa3c6a7341 Mon Sep 17 00:00:00 2001 From: Zach Heylmun Date: Wed, 1 Apr 2026 17:56:08 -0400 Subject: [PATCH 01/58] prepare error type and dependencies for no_std - Add std/alloc feature flags with std as default - Add embedded-io dependency, disable default features on thiserror/tracing - Replace IoError(std::io::Error) with IoError(embedded_io::ErrorKind) - Drop Vec from InvalidDiagnosticIdentifierPayload error variant - Drop String from ReservedForLegislativeUse error variant - Replace panicking From with TryFrom for RoutineControlSubFunction and DtcSettings - Replace format!+Vec.join() Debug impls with core::fmt loops - Add #![cfg_attr(not(feature = "std"), no_std)] to lib.rs --- Cargo.lock | 19 +++++--------- Cargo.toml | 8 ++++-- src/common/dtc_status.rs | 10 ++------ src/error.rs | 25 +++++++++++++----- src/lib.rs | 25 ++++++++++-------- src/protocol_definitions.rs | 38 ++++++++++------------------ src/services/control_dtc_settings.rs | 4 +-- src/services/routine_control.rs | 4 +-- 8 files changed, 66 insertions(+), 67 deletions(-) diff --git a/Cargo.lock b/Cargo.lock index 546a136..8ad88ea 100644 --- a/Cargo.lock +++ b/Cargo.lock @@ -114,6 +114,12 @@ version = "1.0.4" source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "b05b61dc5112cbb17e4b6cd61790d9845d13888356391624cbe7e41efeac1e75" +[[package]] +name = "embedded-io" +version = "0.6.1" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "edd0f118536f44f5ccd48bcb8b111bdc3de888b58c74639dfb034a357d0f206d" + [[package]] name = "equivalent" version = "1.0.2" @@ -299,21 +305,9 @@ source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "784e0ac535deb450455cbfa28a6f0df145ea1bb7ae51b821cf5e7927fdcfbdd0" dependencies = [ "pin-project-lite", - "tracing-attributes", "tracing-core", ] -[[package]] -name = "tracing-attributes" -version = "0.1.30" -source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "81383ab64e72a7a8b8e13130c49e3dab29def6d0c7d76a03087b3cf71c5c6903" -dependencies = [ - "proc-macro2", - "quote", - "syn", -] - [[package]] name = "tracing-core" version = "0.1.34" @@ -330,6 +324,7 @@ dependencies = [ "bitmask-enum", "byteorder", "clap", + "embedded-io", "serde", "serde_bytes", "thiserror", diff --git a/Cargo.toml b/Cargo.toml index 9628e1a..49c8dd6 100644 --- a/Cargo.toml +++ b/Cargo.toml @@ -19,6 +19,9 @@ authors = [ ] [features] +default = ["std"] +std = ["alloc", "thiserror/std", "tracing/std", "embedded-io/std"] +alloc = [] serde = ["dep:serde", "dep:serde_bytes"] utoipa = ["dep:utoipa"] clap = ["dep:clap"] @@ -26,8 +29,9 @@ clap = ["dep:clap"] [dependencies] bitmask-enum = "2" byteorder = "1" -thiserror = "2" -tracing = "0.1" +embedded-io = { version = "0.6", default-features = false } +thiserror = { version = "2", default-features = false } +tracing = { version = "0.1", default-features = false } # Optional dependencies serde = { version = "1", optional = true, features = ["derive"] } serde_bytes = { version = "0.11", optional = true } diff --git a/src/common/dtc_status.rs b/src/common/dtc_status.rs index 9f41da5..c9b2b8e 100644 --- a/src/common/dtc_status.rs +++ b/src/common/dtc_status.rs @@ -413,10 +413,7 @@ impl DTCStoredDataRecordNumber { /// Will return `Err(Error::ReservedForLegislativeUse()` if the record number == 0x00 or 0xF0 pub fn new(record_number: u8) -> Result { if record_number == 0 || record_number == 0xF0 { - return Err(Error::ReservedForLegislativeUse( - "DTCStoredDataRecordNumber".to_string(), - record_number, - )); + return Err(Error::ReservedForLegislativeUse(record_number)); } Ok(Self(record_number)) } @@ -438,10 +435,7 @@ impl SingleValueWireFormat for DTCStoredDataRecordNumber { let value = reader.read_u8()?; if value == 0x00 { // Reserved for Legislative purposes - return Err(Error::ReservedForLegislativeUse( - "DTCStoredDataRecordNumber".to_string(), - value, - )); + return Err(Error::ReservedForLegislativeUse(value)); } Ok(Self(value)) } diff --git a/src/error.rs b/src/error.rs index 9e8a1d0..279b878 100644 --- a/src/error.rs +++ b/src/error.rs @@ -5,8 +5,8 @@ use thiserror::Error; #[non_exhaustive] pub enum Error { /// An underlying I/O error occurred while reading or writing. - #[error(transparent)] - IoError(#[from] std::io::Error), + #[error("I/O error: {0:?}")] + IoError(embedded_io::ErrorKind), /// The byte stream contained fewer bytes than expected. #[error("Insufficient data. Expected {0} bytes.")] InsufficientData(usize), @@ -14,8 +14,8 @@ pub enum Error { #[error("Invalid Diagnostic Identifier: {0:X}")] InvalidDiagnosticIdentifier(u16), /// The u16 identifier is unrecognised and carried an unexpected payload. - #[error("Invalid Diagnostic Identifier: {0:X} with payload {1:?}")] - InvalidDiagnosticIdentifierPayload(u16, Vec), + #[error("Invalid Diagnostic Identifier with payload: {0:X}")] + InvalidDiagnosticIdentifierPayload(u16), /// The session-type byte is not a valid [`DiagnosticSessionType`](crate::DiagnosticSessionType). #[error("Invalid diagnostic session type: {0}")] InvalidDiagnosticSessionType(u8), @@ -59,9 +59,22 @@ pub enum Error { #[error("Invalid DTC Format Identifier: {0}")] InvalidDtcFormatIdentifier(u8), /// The value is reserved for legislative use and must not be used. - #[error("Reserved for legislative use: {0} ({1})")] - ReservedForLegislativeUse(String, u8), + #[error("Reserved for legislative use: {0}")] + ReservedForLegislativeUse(u8), /// The service type is not yet implemented in this crate. #[error("UDS service not implemented: {0:?}")] ServiceNotImplemented(crate::UdsServiceType), } + +impl From for Error { + fn from(kind: embedded_io::ErrorKind) -> Self { + Self::IoError(kind) + } +} + +#[cfg(feature = "std")] +impl From for Error { + fn from(_err: std::io::Error) -> Self { + Self::IoError(embedded_io::ErrorKind::Other) + } +} diff --git a/src/lib.rs b/src/lib.rs index 2589d00..93dc515 100644 --- a/src/lib.rs +++ b/src/lib.rs @@ -1,5 +1,6 @@ #![doc = include_str!(concat!(env!("CARGO_MANIFEST_DIR"), "/README.md"))] #![warn(clippy::pedantic, missing_docs)] +#![cfg_attr(not(feature = "std"), no_std)] mod error; pub use error::Error; @@ -86,13 +87,14 @@ impl From for u8 { } } -impl From for RoutineControlSubFunction { - fn from(value: u8) -> Self { +impl TryFrom for RoutineControlSubFunction { + type Error = Error; + fn try_from(value: u8) -> Result { match value { - 0x01 => RoutineControlSubFunction::StartRoutine, - 0x02 => RoutineControlSubFunction::StopRoutine, - 0x03 => RoutineControlSubFunction::RequestRoutineResults, - _ => panic!("Invalid routine control subfunction: {value}"), + 0x01 => Ok(RoutineControlSubFunction::StartRoutine), + 0x02 => Ok(RoutineControlSubFunction::StopRoutine), + 0x03 => Ok(RoutineControlSubFunction::RequestRoutineResults), + _ => Err(Error::IncorrectMessageLengthOrInvalidFormat), } } } @@ -148,12 +150,13 @@ impl From for u8 { } } -impl From for DtcSettings { - fn from(value: u8) -> Self { +impl TryFrom for DtcSettings { + type Error = Error; + fn try_from(value: u8) -> Result { match value { - 0x01 => Self::On, - 0x02 => Self::Off, - _ => panic!("Invalid DTC setting: {value}"), + 0x01 => Ok(Self::On), + 0x02 => Ok(Self::Off), + _ => Err(Error::IncorrectMessageLengthOrInvalidFormat), } } } diff --git a/src/protocol_definitions.rs b/src/protocol_definitions.rs index 8c75718..b790f14 100644 --- a/src/protocol_definitions.rs +++ b/src/protocol_definitions.rs @@ -139,18 +139,13 @@ impl IterableWireFormat for ProtocolPayload { } } -impl std::fmt::Debug for ProtocolPayload { - fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result { - write!( - f, - "{} => {}", - self.identifier, - self.payload - .iter() - .map(|b| format!("{b:02X}")) - .collect::>() - .join(" ") - ) +impl core::fmt::Debug for ProtocolPayload { + fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result { + write!(f, "{} =>", self.identifier)?; + for b in &self.payload { + write!(f, " {b:02X}")?; + } + Ok(()) } } @@ -247,18 +242,13 @@ impl IterableWireFormat for ProtocolRoutinePayload { } } -impl std::fmt::Debug for ProtocolRoutinePayload { - fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result { - write!( - f, - "{:?} => {}", - self.identifier, - self.payload - .iter() - .map(|b| format!("{b:02X}")) - .collect::>() - .join(" ") - ) +impl core::fmt::Debug for ProtocolRoutinePayload { + fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result { + write!(f, "{:?} =>", self.identifier)?; + for b in &self.payload { + write!(f, " {b:02X}")?; + } + Ok(()) } } diff --git a/src/services/control_dtc_settings.rs b/src/services/control_dtc_settings.rs index 81a33c6..f326e31 100644 --- a/src/services/control_dtc_settings.rs +++ b/src/services/control_dtc_settings.rs @@ -43,7 +43,7 @@ impl WireFormat for ControlDTCSettingsRequest { impl SingleValueWireFormat for ControlDTCSettingsRequest { fn decode(reader: &mut T) -> Result { let request_byte = reader.read_u8()?; - let setting = DtcSettings::from(request_byte & !SUCCESS); + let setting = DtcSettings::try_from(request_byte & !SUCCESS)?; let suppress_response = request_byte & SUCCESS != 0; Ok(Self { setting, @@ -83,7 +83,7 @@ impl WireFormat for ControlDTCSettingsResponse { impl SingleValueWireFormat for ControlDTCSettingsResponse { fn decode(reader: &mut T) -> Result { - let setting = DtcSettings::from(reader.read_u8()?); + let setting = DtcSettings::try_from(reader.read_u8()?)?; Ok(Self { setting }) } } diff --git a/src/services/routine_control.rs b/src/services/routine_control.rs index 87004d6..dba3255 100644 --- a/src/services/routine_control.rs +++ b/src/services/routine_control.rs @@ -63,7 +63,7 @@ impl SingleVa for RoutineControlRequest { fn decode(reader: &mut T) -> Result { - let sub_function = RoutineControlSubFunction::from(reader.read_u8()?); + let sub_function = RoutineControlSubFunction::try_from(reader.read_u8()?)?; let routine_id = RoutineIdentifier::decode(reader)?; let data = RoutinePayload::decode_next(reader)?; Ok(Self { @@ -133,7 +133,7 @@ impl SingleValueWireFormat for RoutineControlResponse { fn decode(reader: &mut T) -> Result { - let routine_control_type = RoutineControlSubFunction::from(reader.read_u8()?); + let routine_control_type = RoutineControlSubFunction::try_from(reader.read_u8()?)?; // Reads the identifier, then can read 0 bytes, 1 byte, or more let routine_status_record = RoutineStatusRecord::decode(reader)?; Ok(Self { From c30cdb225d4d2ac0fb02695fff771c3fa3e27157 Mon Sep 17 00:00:00 2001 From: Zach Date: Thu, 2 Apr 2026 14:46:51 -0400 Subject: [PATCH 02/58] Switch to using byteorder-embedded-io --- Cargo.lock | 207 ++++++++------------- Cargo.toml | 6 +- src/common/dtc_ext_data.rs | 2 +- src/common/dtc_snapshot.rs | 6 +- src/common/dtc_status.rs | 2 +- src/common/format_identifiers.rs | 2 +- src/common/primitive_generics.rs | 3 +- src/request.rs | 2 +- src/response.rs | 2 +- src/services/clear_dtc_information.rs | 2 +- src/services/communication_control.rs | 3 +- src/services/control_dtc_settings.rs | 2 +- src/services/diagnostic_session_control.rs | 10 +- src/services/ecu_reset.rs | 2 +- src/services/negative_response.rs | 2 +- src/services/read_dtc_information.rs | 12 +- src/services/request_download.rs | 2 +- src/services/request_file_transfer.rs | 32 ++-- src/services/routine_control.rs | 2 +- src/services/security_access.rs | 2 +- src/services/tester_present.rs | 2 +- src/services/transfer_data.rs | 2 +- src/services/write_data_by_identifier.rs | 2 +- src/traits.rs | 5 +- 24 files changed, 135 insertions(+), 179 deletions(-) diff --git a/Cargo.lock b/Cargo.lock index 8ad88ea..57482ab 100644 --- a/Cargo.lock +++ b/Cargo.lock @@ -4,9 +4,9 @@ version = 4 [[package]] name = "anstream" -version = "0.6.20" +version = "1.0.0" source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "3ae563653d1938f79b1ab1b5e668c87c76a9930414574a6583a7b7e11a8e6192" +checksum = "824a212faf96e9acacdbd09febd34438f8f711fb84e09a8916013cd7815ca28d" dependencies = [ "anstyle", "anstyle-parse", @@ -19,33 +19,33 @@ dependencies = [ [[package]] name = "anstyle" -version = "1.0.11" +version = "1.0.14" source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "862ed96ca487e809f1c8e5a8447f6ee2cf102f846893800b20cebdf541fc6bbd" +checksum = "940b3a0ca603d1eade50a4846a2afffd5ef57a9feac2c0e2ec2e14f9ead76000" [[package]] name = "anstyle-parse" -version = "0.2.7" +version = "1.0.0" source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "4e7644824f0aa2c7b9384579234ef10eb7efb6a0deb83f9630a49594dd9c15c2" +checksum = "52ce7f38b242319f7cabaa6813055467063ecdc9d355bbb4ce0c68908cd8130e" dependencies = [ "utf8parse", ] [[package]] name = "anstyle-query" -version = "1.1.4" +version = "1.1.5" source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "9e231f6134f61b71076a3eab506c379d4f36122f2af15a9ff04415ea4c3339e2" +checksum = "40c48f72fd53cd289104fc64099abca73db4166ad86ea0b4341abe65af83dadc" dependencies = [ "windows-sys", ] [[package]] name = "anstyle-wincon" -version = "3.0.10" +version = "3.0.11" source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "3e0633414522a32ffaac8ac6cc8f748e090c5717661fddeea04219e2344f5f2a" +checksum = "291e6a250ff86cd4a820112fb8898808a366d8f9f58ce16d1f538353ad55747d" dependencies = [ "anstyle", "once_cell_polyfill", @@ -68,11 +68,21 @@ version = "1.5.0" source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "1fd0f2584146f6f2ef48085050886acf353beff7305ebd1ae69500e27c67f64b" +[[package]] +name = "byteorder-embedded-io" +version = "0.1.1" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "9ed6bb9472871706c9b1f648ca527031e33d647a95706d6ab5659f22ca28d419" +dependencies = [ + "byteorder", + "embedded-io", +] + [[package]] name = "clap" -version = "4.5.47" +version = "4.6.0" source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "7eac00902d9d136acd712710d71823fb8ac8004ca445a89e73a41d45aa712931" +checksum = "b193af5b67834b676abd72466a96c1024e6a6ad978a1f484bd90b85c94041351" dependencies = [ "clap_builder", "clap_derive", @@ -80,9 +90,9 @@ dependencies = [ [[package]] name = "clap_builder" -version = "4.5.47" +version = "4.6.0" source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "2ad9bbf750e73b5884fb8a211a9424a1906c1e156724260fdae972f31d70e1d6" +checksum = "714a53001bf66416adb0e2ef5ac857140e7dc3a0c48fb28b2f10762fc4b5069f" dependencies = [ "anstream", "anstyle", @@ -92,9 +102,9 @@ dependencies = [ [[package]] name = "clap_derive" -version = "4.5.47" +version = "4.6.0" source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "bbfd7eae0b0f1a6e63d4b13c9c478de77c2eb546fba158ad50b4203dc24b9f9c" +checksum = "1110bd8a634a1ab8cb04345d8d878267d57c3cf1b38d91b71af6686408bbca6a" dependencies = [ "heck", "proc-macro2", @@ -104,21 +114,21 @@ dependencies = [ [[package]] name = "clap_lex" -version = "0.7.5" +version = "1.1.0" source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "b94f61472cee1439c0b966b47e3aca9ae07e45d070759512cd390ea2bebc6675" +checksum = "c8d4a3bb8b1e0c1050499d1815f5ab16d04f0959b233085fb31653fbfc9d98f9" [[package]] name = "colorchoice" -version = "1.0.4" +version = "1.0.5" source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "b05b61dc5112cbb17e4b6cd61790d9845d13888356391624cbe7e41efeac1e75" +checksum = "1d07550c9036bf2ae0c684c4297d503f838287c83c53686d05370d0e139ae570" [[package]] name = "embedded-io" -version = "0.6.1" +version = "0.7.1" source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "edd0f118536f44f5ccd48bcb8b111bdc3de888b58c74639dfb034a357d0f206d" +checksum = "9eb1aa714776b75c7e67e1da744b81a129b3ff919c8712b5e1b32252c1f07cc7" [[package]] name = "equivalent" @@ -128,9 +138,9 @@ checksum = "877a4ace8713b0bcf2a4e7eec82529c029f1d0619886d18145fea96c3ffe5c0f" [[package]] name = "hashbrown" -version = "0.15.5" +version = "0.16.1" source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "9229cfe53dfd69f0609a49f65461bd93001ea1ef889cd5529dd176593f5338a1" +checksum = "841d1cc9bed7f9236f321df977030373f4a4163ae1a7dbfe1a51a2c1a51d9100" [[package]] name = "heck" @@ -140,75 +150,70 @@ checksum = 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= "0.2.16" +version = "0.2.17" source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "3b3cff922bd51709b605d9ead9aa71031d81447142d828eb4a6eba76fe619f9b" +checksum = "a89322df9ebe1c1578d689c92318e070967d1042b512afbe49518723f4e6d5cd" [[package]] name = "proc-macro2" -version = "1.0.101" +version = "1.0.106" source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "89ae43fd86e4158d6db51ad8e2b80f313af9cc74f5c0e03ccb87de09998732de" +checksum = "8fd00f0bb2e90d81d1044c2b32617f68fcb9fa3bb7640c23e9c748e53fb30934" dependencies = [ "unicode-ident", ] [[package]] name = "quote" -version = "1.0.40" +version = "1.0.45" source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "1885c039570dc00dcb4ff087a89e185fd56bae234ddc7f056a945bf36467248d" +checksum = "41f2619966050689382d2b44f664f4bc593e129785a36d6ee376ddf37259b924" dependencies = [ "proc-macro2", ] -[[package]] -name = "ryu" -version = "1.0.20" -source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "28d3b2b1366ec20994f1fd18c3c594f05c5dd4bc44d8bb0c1c632c8d6829481f" - [[package]] name = "serde" version = "1.0.228" @@ -251,14 +256,15 @@ dependencies = [ [[package]] name = "serde_json" -version = "1.0.143" +version = "1.0.149" source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "d401abef1d108fbd9cbaebc3e46611f4b1021f714a0597a71f41ee463f5f4a5a" +checksum = "83fc039473c5595ace860d8c4fafa220ff474b3fc6bfdb4293327f1a37e94d86" dependencies = [ "itoa", "memchr", - "ryu", "serde", + "serde_core", + "zmij", ] [[package]] @@ -269,9 +275,9 @@ checksum = "7da8b5736845d9f2fcb837ea5d9e2628564b3b043a70948a3f0b778838c5fb4f" [[package]] name = "syn" -version = "2.0.106" +version = "2.0.117" source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "ede7c438028d4436d71104916910f5bb611972c5cfd7f89b8300a8186e6fada6" +checksum = "e665b8803e7b1d2a727f4023456bbbbe74da67099c585258af0ad9c5013b9b99" dependencies = [ "proc-macro2", "quote", @@ -280,18 +286,18 @@ dependencies = [ [[package]] name = "thiserror" -version = "2.0.16" +version = "2.0.18" source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "3467d614147380f2e4e374161426ff399c91084acd2363eaf549172b3d5e60c0" +checksum = "4288b5bcbc7920c07a1149a35cf9590a2aa808e0bc1eafaade0b80947865fbc4" dependencies = [ "thiserror-impl", ] [[package]] name = "thiserror-impl" -version = "2.0.16" +version = "2.0.18" source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "6c5e1be1c48b9172ee610da68fd9cd2770e7a4056cb3fc98710ee6906f0c7960" +checksum = "ebc4ee7f67670e9b64d05fa4253e753e016c6c95ff35b89b7941d6b856dec1d5" dependencies = [ "proc-macro2", "quote", @@ -300,9 +306,9 @@ dependencies = [ [[package]] name = "tracing" -version = "0.1.41" +version = "0.1.44" source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "784e0ac535deb450455cbfa28a6f0df145ea1bb7ae51b821cf5e7927fdcfbdd0" +checksum = "63e71662fa4b2a2c3a26f570f037eb95bb1f85397f3cd8076caed2f026a6d100" dependencies = [ "pin-project-lite", "tracing-core", @@ -310,9 +316,9 @@ dependencies = [ [[package]] name = "tracing-core" -version = "0.1.34" +version = "0.1.36" source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "b9d12581f227e93f094d3af2ae690a574abb8a2b9b7a96e7cfe9647b2b617678" +checksum = "db97caf9d906fbde555dd62fa95ddba9eecfd14cb388e4f491a66d74cd5fb79a" dependencies = [ "once_cell", ] @@ -322,7 +328,7 @@ name = "uds_protocol" version = "0.1.0" dependencies = [ "bitmask-enum", - "byteorder", + "byteorder-embedded-io", "clap", "embedded-io", "serde", @@ -334,9 +340,9 @@ dependencies = [ [[package]] name = "unicode-ident" -version = "1.0.18" +version = "1.0.24" source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "5a5f39404a5da50712a4c1eecf25e90dd62b613502b7e925fd4e4d19b5c96512" +checksum = "e6e4313cd5fcd3dad5cafa179702e2b244f760991f45397d14d4ebf38247da75" [[package]] name = "utf8parse" @@ -369,80 +375,21 @@ dependencies = [ [[package]] name = "windows-link" -version = "0.1.3" +version = "0.2.1" source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "5e6ad25900d524eaabdbbb96d20b4311e1e7ae1699af4fb28c17ae66c80d798a" +checksum = "f0805222e57f7521d6a62e36fa9163bc891acd422f971defe97d64e70d0a4fe5" [[package]] name = "windows-sys" -version = "0.60.2" -source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "f2f500e4d28234f72040990ec9d39e3a6b950f9f22d3dba18416c35882612bcb" -dependencies = [ - "windows-targets", -] - -[[package]] -name = "windows-targets" -version = "0.53.3" +version = "0.61.2" source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "d5fe6031c4041849d7c496a8ded650796e7b6ecc19df1a431c1a363342e5dc91" +checksum = "ae137229bcbd6cdf0f7b80a31df61766145077ddf49416a728b02cb3921ff3fc" dependencies = [ "windows-link", - "windows_aarch64_gnullvm", - "windows_aarch64_msvc", - "windows_i686_gnu", - "windows_i686_gnullvm", - "windows_i686_msvc", - "windows_x86_64_gnu", - "windows_x86_64_gnullvm", - "windows_x86_64_msvc", ] [[package]] -name = "windows_aarch64_gnullvm" -version = "0.53.0" -source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "86b8d5f90ddd19cb4a147a5fa63ca848db3df085e25fee3cc10b39b6eebae764" - -[[package]] -name = "windows_aarch64_msvc" -version = "0.53.0" -source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "c7651a1f62a11b8cbd5e0d42526e55f2c99886c77e007179efff86c2b137e66c" - -[[package]] -name = "windows_i686_gnu" -version = "0.53.0" -source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "c1dc67659d35f387f5f6c479dc4e28f1d4bb90ddd1a5d3da2e5d97b42d6272c3" - -[[package]] -name = "windows_i686_gnullvm" -version = "0.53.0" -source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "9ce6ccbdedbf6d6354471319e781c0dfef054c81fbc7cf83f338a4296c0cae11" - -[[package]] -name = "windows_i686_msvc" -version = "0.53.0" -source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "581fee95406bb13382d2f65cd4a908ca7b1e4c2f1917f143ba16efe98a589b5d" - -[[package]] -name = "windows_x86_64_gnu" -version = "0.53.0" -source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "2e55b5ac9ea33f2fc1716d1742db15574fd6fc8dadc51caab1c16a3d3b4190ba" - -[[package]] -name = "windows_x86_64_gnullvm" -version = "0.53.0" -source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "0a6e035dd0599267ce1ee132e51c27dd29437f63325753051e71dd9e42406c57" - -[[package]] -name = "windows_x86_64_msvc" -version = "0.53.0" +name = "zmij" +version = "1.0.21" source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "271414315aff87387382ec3d271b52d7ae78726f5d44ac98b4f4030c91880486" +checksum = "b8848ee67ecc8aedbaf3e4122217aff892639231befc6a1b58d29fff4c2cabaa" diff --git a/Cargo.toml b/Cargo.toml index 49c8dd6..e08b9ee 100644 --- a/Cargo.toml +++ b/Cargo.toml @@ -20,7 +20,7 @@ authors = [ [features] default = ["std"] -std = ["alloc", "thiserror/std", "tracing/std", "embedded-io/std"] +std = ["alloc", "thiserror/std", "tracing/std"] alloc = [] serde = ["dep:serde", "dep:serde_bytes"] utoipa = ["dep:utoipa"] @@ -28,8 +28,8 @@ clap = ["dep:clap"] [dependencies] bitmask-enum = "2" -byteorder = "1" -embedded-io = { version = "0.6", default-features = false } +byteorder-embedded-io = { version = "0.1", features = ["embedded-io", "std"] } +embedded-io = "0.7" thiserror = { version = "2", default-features = false } tracing = { version = "0.1", default-features = false } # Optional dependencies diff --git a/src/common/dtc_ext_data.rs b/src/common/dtc_ext_data.rs index eba7055..f2738be 100644 --- a/src/common/dtc_ext_data.rs +++ b/src/common/dtc_ext_data.rs @@ -1,4 +1,4 @@ -use byteorder::{ReadBytesExt, WriteBytesExt}; +use byteorder_embedded_io::io::{ReadBytesExt, WriteBytesExt}; use crate::{ DTCRecord, DTCStatusMask, Error, IterableWireFormat, SingleValueWireFormat, WireFormat, diff --git a/src/common/dtc_snapshot.rs b/src/common/dtc_snapshot.rs index 3efc1ee..e7b1c8b 100644 --- a/src/common/dtc_snapshot.rs +++ b/src/common/dtc_snapshot.rs @@ -1,7 +1,7 @@ //! Diagnostic Trouble Code (DTC) Snapshot Data //! Snapshot data represents a collection of sensor values captured when a DTC is triggered. //! Represents the state of the server at the time the DTC was triggered. -use byteorder::{ReadBytesExt, WriteBytesExt}; +use byteorder_embedded_io::io::{ReadBytesExt, WriteBytesExt}; use crate::{ DTCRecord, DTCStatusMask, Error, IterableWireFormat, SingleValueWireFormat, WireFormat, @@ -260,7 +260,7 @@ mod snapshot { } fn encode(&self, writer: &mut T) -> Result { - writer.write_u16::(self.value())?; + writer.write_u16::(self.value())?; let mut written = 2; match self { @@ -270,7 +270,7 @@ mod snapshot { } // bogus data ProtocolPayload::Did8712(..) => { - writer.write_u32::(78)?; + writer.write_u32::(78)?; written += 4; } } diff --git a/src/common/dtc_status.rs b/src/common/dtc_status.rs index c9b2b8e..6a8a9e0 100644 --- a/src/common/dtc_status.rs +++ b/src/common/dtc_status.rs @@ -1,5 +1,5 @@ use bitmask_enum::bitmask; -use byteorder::{ReadBytesExt, WriteBytesExt}; +use byteorder_embedded_io::io::{ReadBytesExt, WriteBytesExt}; use crate::{Error, IterableWireFormat, SingleValueWireFormat, WireFormat}; diff --git a/src/common/format_identifiers.rs b/src/common/format_identifiers.rs index b71ae02..72ff97d 100644 --- a/src/common/format_identifiers.rs +++ b/src/common/format_identifiers.rs @@ -1,5 +1,5 @@ use crate::{Error, SingleValueWireFormat, WireFormat}; -use byteorder::{ReadBytesExt, WriteBytesExt}; +use byteorder_embedded_io::io::{ReadBytesExt, WriteBytesExt}; const LOW_NIBBLE_MASK: u8 = 0b0000_1111; const HIGH_NIBBLE_MASK: u8 = 0b1111_0000; diff --git a/src/common/primitive_generics.rs b/src/common/primitive_generics.rs index 49f16f8..5eb81de 100644 --- a/src/common/primitive_generics.rs +++ b/src/common/primitive_generics.rs @@ -1,5 +1,6 @@ use crate::{Error, SingleValueWireFormat, WireFormat}; -use byteorder::{BigEndian, ReadBytesExt, WriteBytesExt}; +use byteorder_embedded_io::BigEndian; +use byteorder_embedded_io::io::{ReadBytesExt, WriteBytesExt}; /// Implement [`WireFormat`] and [`SingleValueWireFormat`] for unsigned integer primitives. #[macro_export] diff --git a/src/request.rs b/src/request.rs index 3d71b82..6daede3 100644 --- a/src/request.rs +++ b/src/request.rs @@ -9,7 +9,7 @@ use crate::{ TransferDataRequest, WriteDataByIdentifierRequest, }, }; -use byteorder::{ReadBytesExt, WriteBytesExt}; +use byteorder_embedded_io::io::{ReadBytesExt, WriteBytesExt}; use std::io::{Read, Write}; use super::{ diff --git a/src/response.rs b/src/response.rs index de78a02..bb4a8b3 100644 --- a/src/response.rs +++ b/src/response.rs @@ -7,7 +7,7 @@ use crate::{ TesterPresentResponse, TransferDataResponse, UdsServiceType, WireFormat, WriteDataByIdentifierResponse, }; -use byteorder::{ReadBytesExt, WriteBytesExt}; +use byteorder_embedded_io::io::{ReadBytesExt, WriteBytesExt}; use std::io::{Read, Write}; /// A raw UDS response consisting of the service type and its unparsed payload bytes. diff --git a/src/services/clear_dtc_information.rs b/src/services/clear_dtc_information.rs index 2100886..31b0b48 100644 --- a/src/services/clear_dtc_information.rs +++ b/src/services/clear_dtc_information.rs @@ -1,6 +1,6 @@ //! `ClearDiagnosticInformation` (0x14) service implementation use crate::{CLEAR_ALL_DTCS, DTCRecord, NegativeResponseCode, SingleValueWireFormat, WireFormat}; -use byteorder::{ReadBytesExt, WriteBytesExt}; +use byteorder_embedded_io::io::{ReadBytesExt, WriteBytesExt}; /// Negative response codes const CLEAR_DIAG_INFO_NEGATIVE_RESPONSE_CODES: [NegativeResponseCode; 4] = [ diff --git a/src/services/communication_control.rs b/src/services/communication_control.rs index f8713c1..c4ba16c 100644 --- a/src/services/communication_control.rs +++ b/src/services/communication_control.rs @@ -3,7 +3,8 @@ use crate::{ CommunicationControlType, CommunicationType, Error, NegativeResponseCode, SingleValueWireFormat, SuppressablePositiveResponse, WireFormat, }; -use byteorder::{BigEndian, ReadBytesExt, WriteBytesExt}; +use byteorder_embedded_io::BigEndian; +use byteorder_embedded_io::io::{ReadBytesExt, WriteBytesExt}; const COMMUNICATION_CONTROL_NEGATIVE_RESPONSE_CODES: [NegativeResponseCode; 4] = [ NegativeResponseCode::SubFunctionNotSupported, diff --git a/src/services/control_dtc_settings.rs b/src/services/control_dtc_settings.rs index f326e31..6794821 100644 --- a/src/services/control_dtc_settings.rs +++ b/src/services/control_dtc_settings.rs @@ -1,6 +1,6 @@ //! `ControlDTCSetting` (0x85) service implementation use crate::{DtcSettings, Error, SUCCESS, SingleValueWireFormat, WireFormat}; -use byteorder::{ReadBytesExt, WriteBytesExt}; +use byteorder_embedded_io::io::{ReadBytesExt, WriteBytesExt}; /// The `ControlDTCSettings` service is used to control the DTC settings of the ECU. #[cfg_attr(feature = "serde", derive(serde::Deserialize, serde::Serialize))] diff --git a/src/services/diagnostic_session_control.rs b/src/services/diagnostic_session_control.rs index 50c9ab5..b1be16c 100644 --- a/src/services/diagnostic_session_control.rs +++ b/src/services/diagnostic_session_control.rs @@ -13,7 +13,7 @@ use crate::{ DiagnosticSessionType, Error, NegativeResponseCode, SingleValueWireFormat, SuppressablePositiveResponse, WireFormat, }; -use byteorder::{ReadBytesExt, WriteBytesExt}; +use byteorder_embedded_io::io::{ReadBytesExt, WriteBytesExt}; const DIAGNOSTIC_SESSION_CONTROL_NEGATIVE_RESPONSE_CODES: [NegativeResponseCode; 3] = [ NegativeResponseCode::SubFunctionNotSupported, @@ -118,8 +118,8 @@ impl WireFormat for DiagnosticSessionControlResponse { fn encode(&self, buffer: &mut T) -> Result { buffer.write_u8(u8::from(self.session_type))?; - buffer.write_u16::(self.p2_server_max)?; - buffer.write_u16::(self.p2_star_server_max)?; + buffer.write_u16::(self.p2_server_max)?; + buffer.write_u16::(self.p2_star_server_max)?; Ok(5) } @@ -128,8 +128,8 @@ impl WireFormat for DiagnosticSessionControlResponse { impl SingleValueWireFormat for DiagnosticSessionControlResponse { fn decode(reader: &mut T) -> Result { let session_type = DiagnosticSessionType::try_from(reader.read_u8()?)?; - let p2_server_max = reader.read_u16::()?; - let p2_star_server_max = reader.read_u16::()?; + let p2_server_max = reader.read_u16::()?; + let p2_star_server_max = reader.read_u16::()?; Ok(Self { session_type, p2_server_max, diff --git a/src/services/ecu_reset.rs b/src/services/ecu_reset.rs index 3e879b6..fdd8dcb 100644 --- a/src/services/ecu_reset.rs +++ b/src/services/ecu_reset.rs @@ -3,7 +3,7 @@ use crate::{ Error, NegativeResponseCode, ResetType, SingleValueWireFormat, SuppressablePositiveResponse, WireFormat, }; -use byteorder::{ReadBytesExt, WriteBytesExt}; +use byteorder_embedded_io::io::{ReadBytesExt, WriteBytesExt}; use std::io::{Read, Write}; const ECU_RESET_NEGATIVE_RESPONSE_CODES: [NegativeResponseCode; 4] = [ diff --git a/src/services/negative_response.rs b/src/services/negative_response.rs index 06d4a90..b6c2dde 100644 --- a/src/services/negative_response.rs +++ b/src/services/negative_response.rs @@ -1,6 +1,6 @@ //! `NegativeResponse` (0x7F) service implementation use crate::{Error, NegativeResponseCode, SingleValueWireFormat, UdsServiceType, WireFormat}; -use byteorder::{ReadBytesExt, WriteBytesExt}; +use byteorder_embedded_io::io::{ReadBytesExt, WriteBytesExt}; /// A negative response from the server indicating a request could not be fulfilled #[cfg_attr(feature = "serde", derive(serde::Deserialize, serde::Serialize))] diff --git a/src/services/read_dtc_information.rs b/src/services/read_dtc_information.rs index 353ec81..7090c06 100644 --- a/src/services/read_dtc_information.rs +++ b/src/services/read_dtc_information.rs @@ -1,5 +1,5 @@ //! `ReadDTCInformation` (0x19) request and response service implementation -use byteorder::{ReadBytesExt, WriteBytesExt}; +use byteorder_embedded_io::io::{ReadBytesExt, WriteBytesExt}; use crate::{ DTCExtDataRecordList, DTCExtDataRecordNumber, DTCFormatIdentifier, DTCRecord, DTCSeverityMask, @@ -817,7 +817,7 @@ impl WireFormat for ReadDTCInfoResponse { writer.write_u8(*id)?; writer.write_u8(mask.bits())?; - writer.write_u16::(*count)?; + writer.write_u16::(*count)?; } Self::DTCList(id, mask, list) => { writer.write_u8(*id)?; @@ -926,7 +926,7 @@ impl SingleValueWireFormat for ReadDTCInfoRespo match subfunction_id { 0x01 | 0x07 => { let status = DTCStatusAvailabilityMask::from(reader.read_u8()?); - let count = reader.read_u16::()?; + let count = reader.read_u16::()?; Ok(Self::NumberOfDTCs(subfunction_id, status, count)) } 0x02 | 0x0A | 0x0B | 0x0C | 0x0D | 0x0E | 0x15 => { @@ -1142,7 +1142,7 @@ mod response { impl WireFormat for TestIdentifier { fn encode(&self, writer: &mut T) -> Result { - writer.write_u16::(*self as u16)?; + writer.write_u16::(*self as u16)?; Ok(self.required_size()) } @@ -1849,7 +1849,7 @@ mod ext_data { match self { TestDTCExtData::WarmUpCycleCount(count) => { writer.write_u8(TestDTCExtDataRecordNumber::WarmUpCycleCount as u8)?; - writer.write_u16::(*count)?; + writer.write_u16::(*count)?; } TestDTCExtData::FaultDetectionCounter(count) => { writer.write_u8(TestDTCExtDataRecordNumber::FaultDetectionCounter as u8)?; @@ -1865,7 +1865,7 @@ mod ext_data { let id = TestDTCExtDataRecordNumber::decode_next(reader)?; match id { Some(TestDTCExtDataRecordNumber::WarmUpCycleCount) => { - let count = reader.read_u16::()?; + let count = reader.read_u16::()?; Ok(Some(TestDTCExtData::WarmUpCycleCount(count))) } Some(TestDTCExtDataRecordNumber::FaultDetectionCounter) => { diff --git a/src/services/request_download.rs b/src/services/request_download.rs index 0493316..343cd39 100644 --- a/src/services/request_download.rs +++ b/src/services/request_download.rs @@ -1,5 +1,5 @@ //! `RequestDownload` (0x34) service implementation -use byteorder::{ReadBytesExt, WriteBytesExt}; +use byteorder_embedded_io::io::{ReadBytesExt, WriteBytesExt}; use crate::{ DataFormatIdentifier, Error, LengthFormatIdentifier, MemoryFormatIdentifier, diff --git a/src/services/request_file_transfer.rs b/src/services/request_file_transfer.rs index f09b6ca..dc57506 100644 --- a/src/services/request_file_transfer.rs +++ b/src/services/request_file_transfer.rs @@ -1,5 +1,5 @@ //! `RequestFileTransfer` (0x38) service implementation -use byteorder::{ReadBytesExt, WriteBytesExt}; +use byteorder_embedded_io::io::{ReadBytesExt, WriteBytesExt}; use std::io::Read; use crate::{DataFormatIdentifier, Error, SingleValueWireFormat, WireFormat}; @@ -198,7 +198,7 @@ impl WireFormat for NamePayload { // Write the mode of operation writer.write_u8((self.mode_of_operation).into())?; // Write the file path and name length - writer.write_u16::(self.file_path_and_name_length)?; + writer.write_u16::(self.file_path_and_name_length)?; // Write the file path and name writer.write_all(self.file_path_and_name.as_bytes())?; Ok(self.required_size()) @@ -208,7 +208,7 @@ impl WireFormat for NamePayload { impl SingleValueWireFormat for NamePayload { fn decode(reader: &mut T) -> Result { let mode_of_operation = FileOperationMode::try_from(reader.read_u8()?)?; - let file_path_and_name_length = reader.read_u16::()?; + let file_path_and_name_length = reader.read_u16::()?; // Read # of bytes specified by `file_path_and_name_length` let mut file_path_and_name = String::new(); @@ -440,7 +440,7 @@ impl WireFormat for FileSizePayload { fn encode(&self, writer: &mut T) -> Result { // Always write the file size as 1 byte - writer.write_u16::(self.file_size_parameter_length)?; + writer.write_u16::(self.file_size_parameter_length)?; // write the file size only as many bytes as needed // Slice off only the number of bytes we need from the end of the file_size bytes let uncompressed = self.file_size_uncompressed.to_be_bytes(); @@ -459,7 +459,7 @@ impl WireFormat for FileSizePayload { impl SingleValueWireFormat for FileSizePayload { fn decode(reader: &mut T) -> Result { - let file_size_parameter_length = reader.read_u16::()?; + let file_size_parameter_length = reader.read_u16::()?; let mut file_size_uncompressed = vec![0; file_size_parameter_length as usize]; let mut file_size_compressed = vec![0; file_size_parameter_length as usize]; @@ -514,7 +514,7 @@ impl WireFormat for DirSizePayload { fn encode(&self, writer: &mut T) -> Result { let mut len = 0; - writer.write_u16::(self.dir_info_parameter_length)?; + writer.write_u16::(self.dir_info_parameter_length)?; len += 2; // write the file size only as many bytes as needed // Slice off only the number of bytes we need from the end of the file_size bytes @@ -532,7 +532,7 @@ impl WireFormat for DirSizePayload { impl SingleValueWireFormat for DirSizePayload { fn decode(reader: &mut T) -> Result { - let dir_info_parameter_length = reader.read_u16::()?; + let dir_info_parameter_length = reader.read_u16::()?; let mut dir_info_length = vec![0; dir_info_parameter_length as usize]; reader.read_exact(&mut dir_info_length)?; @@ -582,7 +582,7 @@ impl WireFormat for PositionPayload { } fn encode(&self, writer: &mut T) -> Result { - writer.write_u64::(self.file_position)?; + writer.write_u64::(self.file_position)?; Ok(8) } } @@ -590,7 +590,7 @@ impl WireFormat for PositionPayload { impl SingleValueWireFormat for PositionPayload { fn decode(reader: &mut T) -> Result { Ok(Self { - file_position: reader.read_u64::()?, + file_position: reader.read_u64::()?, }) } } @@ -764,7 +764,7 @@ mod request_tests { bytes.push(mode.into()); // AddFile (u8) // write file_name len as 2 bytes bytes - .write_u16::(file_name.len() as u16) + .write_u16::(file_name.len() as u16) .unwrap(); bytes.extend_from_slice(file_name.as_bytes()); @@ -1008,21 +1008,27 @@ mod response_tests { if mode == FileOperationMode::ReadFile { print!("{mode:?}"); - bytes.write_u16::(num).unwrap(); + bytes + .write_u16::(num) + .unwrap(); let source = file_size.to_be_bytes(); // Compressed bytes.extend_from_slice(&source[16 - num as usize..]); // Uncompressed bytes.extend_from_slice(&source[16 - num as usize..]); } else if mode == FileOperationMode::ReadDir { - bytes.write_u16::(num).unwrap(); + bytes + .write_u16::(num) + .unwrap(); let source = file_size.to_be_bytes(); // Compressed bytes.extend_from_slice(&source[16 - num as usize..]); } if mode == FileOperationMode::ResumeFile { - bytes.write_u64::(file_position).unwrap(); + bytes + .write_u64::(file_position) + .unwrap(); } bytes } diff --git a/src/services/routine_control.rs b/src/services/routine_control.rs index dba3255..c03ae7e 100644 --- a/src/services/routine_control.rs +++ b/src/services/routine_control.rs @@ -6,7 +6,7 @@ use crate::{ Error, Identifier, IterableWireFormat, RoutineControlSubFunction, SingleValueWireFormat, WireFormat, }; -use byteorder::{ReadBytesExt, WriteBytesExt}; +use byteorder_embedded_io::io::{ReadBytesExt, WriteBytesExt}; use std::io::{Read, Write}; /// Used by a client to execute a defined sequence of events and obtain any relevant results diff --git a/src/services/security_access.rs b/src/services/security_access.rs index bae59ee..ee84e64 100644 --- a/src/services/security_access.rs +++ b/src/services/security_access.rs @@ -3,7 +3,7 @@ use crate::{ Error, NegativeResponseCode, SecurityAccessType, SingleValueWireFormat, SuppressablePositiveResponse, WireFormat, }; -use byteorder::{ReadBytesExt, WriteBytesExt}; +use byteorder_embedded_io::io::{ReadBytesExt, WriteBytesExt}; use std::io::{Read, Write}; /// List of allowed [`NegativeResponseCode`] variants for the `SecurityAccess` service diff --git a/src/services/tester_present.rs b/src/services/tester_present.rs index eaeccce..8b89c0b 100644 --- a/src/services/tester_present.rs +++ b/src/services/tester_present.rs @@ -3,7 +3,7 @@ use crate::{ Error, NegativeResponseCode, SingleValueWireFormat, SuppressablePositiveResponse, WireFormat, }; -use byteorder::{ReadBytesExt, WriteBytesExt}; +use byteorder_embedded_io::io::{ReadBytesExt, WriteBytesExt}; const TESTER_PRESENT_NEGATIVE_RESPONSE_CODES: [NegativeResponseCode; 2] = [ NegativeResponseCode::SubFunctionNotSupported, diff --git a/src/services/transfer_data.rs b/src/services/transfer_data.rs index c24234e..3d9e21a 100644 --- a/src/services/transfer_data.rs +++ b/src/services/transfer_data.rs @@ -1,5 +1,5 @@ //! `TransferData` (0x36) service implementation -use byteorder::{ReadBytesExt, WriteBytesExt}; +use byteorder_embedded_io::io::{ReadBytesExt, WriteBytesExt}; use crate::{Error, SingleValueWireFormat, WireFormat}; diff --git a/src/services/write_data_by_identifier.rs b/src/services/write_data_by_identifier.rs index 91003da..710021c 100644 --- a/src/services/write_data_by_identifier.rs +++ b/src/services/write_data_by_identifier.rs @@ -96,7 +96,7 @@ impl SingleValueWireFormat mod test { use super::*; use crate::impl_identifier; - use byteorder::WriteBytesExt; + use byteorder_embedded_io::io::WriteBytesExt; #[cfg_attr(feature = "serde", derive(serde::Deserialize, serde::Serialize))] #[derive(Clone, Copy, Debug, PartialEq)] diff --git a/src/traits.rs b/src/traits.rs index adc380d..7bbb4cf 100644 --- a/src/traits.rs +++ b/src/traits.rs @@ -1,5 +1,6 @@ use crate::Error; -use byteorder::{BigEndian, WriteBytesExt}; +use byteorder_embedded_io::BigEndian; +use byteorder_embedded_io::io::WriteBytesExt; /// Base trait for types that can be serialized to a byte stream. /// @@ -290,7 +291,7 @@ pub trait DiagnosticDefinition: 'static { mod tests { use super::*; use crate::{Identifier, UDSIdentifier}; - use byteorder::ReadBytesExt; + use byteorder_embedded_io::io::ReadBytesExt; use std::io::Cursor; #[cfg_attr(feature = "serde", derive(serde::Deserialize, serde::Serialize))] From c13943301d4aa87684db240379a1a90c1c896e09 Mon Sep 17 00:00:00 2001 From: Zach Heylmun Date: Thu, 2 Apr 2026 15:37:02 -0400 Subject: [PATCH 03/58] add Encode/Decode/DecodeIter traits and fix deps for no_std - Add new no_std-compatible trait hierarchy: Encode (TX), Decode<'a> (RX), and DecodeIter<'a> (RX streaming) alongside existing WireFormat traits - Fix byteorder-embedded-io and embedded-io dependencies to use default-features = false, propagating std feature properly - Gate Vec WireFormat impls behind alloc feature --- Cargo.toml | 6 +++--- src/lib.rs | 7 +++++-- src/traits.rs | 51 +++++++++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 59 insertions(+), 5 deletions(-) diff --git a/Cargo.toml b/Cargo.toml index e08b9ee..90576ff 100644 --- a/Cargo.toml +++ b/Cargo.toml @@ -20,7 +20,7 @@ authors = [ [features] default = ["std"] -std = ["alloc", "thiserror/std", "tracing/std"] +std = ["alloc", "byteorder-embedded-io/std", "embedded-io/std", "thiserror/std", "tracing/std"] alloc = [] serde = ["dep:serde", "dep:serde_bytes"] utoipa = ["dep:utoipa"] @@ -28,8 +28,8 @@ clap = ["dep:clap"] [dependencies] bitmask-enum = "2" -byteorder-embedded-io = { version = "0.1", features = ["embedded-io", "std"] } -embedded-io = "0.7" +byteorder-embedded-io = { version = "0.1", default-features = false, features = ["embedded-io"] } +embedded-io = { version = "0.7", default-features = false } thiserror = { version = "2", default-features = false } tracing = { version = "0.1", default-features = false } # Optional dependencies diff --git a/src/lib.rs b/src/lib.rs index 93dc515..115c430 100644 --- a/src/lib.rs +++ b/src/lib.rs @@ -6,8 +6,8 @@ pub use error::Error; mod traits; pub use traits::{ - DiagnosticDefinition, Identifier, IterableWireFormat, RoutineIdentifier, SingleValueWireFormat, - WireFormat, + Decode, DecodeIter, DiagnosticDefinition, Encode, Identifier, IterableWireFormat, + RoutineIdentifier, SingleValueWireFormat, WireFormat, }; mod common; @@ -99,6 +99,7 @@ impl TryFrom for RoutineControlSubFunction { } } +#[cfg(feature = "alloc")] impl WireFormat for Vec { fn required_size(&self) -> usize { self.len() @@ -110,6 +111,7 @@ impl WireFormat for Vec { } } +#[cfg(feature = "alloc")] impl SingleValueWireFormat for Vec { fn decode(reader: &mut T) -> Result { let mut data = Vec::new(); @@ -118,6 +120,7 @@ impl SingleValueWireFormat for Vec { } } +#[cfg(feature = "alloc")] impl IterableWireFormat for Vec { fn decode_next(reader: &mut T) -> Result, Error> { let mut data = Vec::new(); diff --git a/src/traits.rs b/src/traits.rs index 7bbb4cf..85b4e8b 100644 --- a/src/traits.rs +++ b/src/traits.rs @@ -2,6 +2,57 @@ use crate::Error; use byteorder_embedded_io::BigEndian; use byteorder_embedded_io::io::WriteBytesExt; +// --------------------------------------------------------------------------- +// New no_std-compatible traits (TX: Encode, RX: Decode / DecodeIter) +// --------------------------------------------------------------------------- + +/// TX-side trait: encode a value into an [`embedded_io::Write`] implementor. +/// +/// This is the `no_std` replacement for the encoding half of [`WireFormat`]. +pub trait Encode { + /// Number of bytes this value will write. + fn encoded_size(&self) -> usize; + + /// Serialize into `writer`, returning the number of bytes written. + /// + /// # Errors + /// Returns [`Error::IoError`] if the writer fails. + fn encode(&self, writer: &mut impl embedded_io::Write) -> Result; + + /// Whether the positive response for this message is suppressed (SPRMIB). + fn is_positive_response_suppressed(&self) -> bool { + false + } +} + +/// RX-side trait: zero-copy decode from a byte slice. +/// +/// Implementations borrow directly from the input buffer where possible. +/// Returns the decoded value together with the unconsumed remainder of the +/// buffer. +pub trait Decode<'a>: Sized { + /// Decode from `buf`, returning `(value, remaining_bytes)`. + /// + /// # Errors + /// Returns an error if `buf` is too short or contains invalid data. + fn decode(buf: &'a [u8]) -> Result<(Self, &'a [u8]), Error>; +} + +/// RX-side trait: streaming / iterable zero-copy decode. +/// +/// Used for variable-length sequences where the number of items is not known +/// ahead of time. Each call consumes one item and returns the remainder, or +/// `Ok(None)` when the buffer is exhausted. +pub trait DecodeIter<'a>: Sized { + /// Try to decode the next item from `buf`. + /// + /// Returns `Ok(None)` when the buffer is empty (sequence exhausted). + /// + /// # Errors + /// Returns an error if the buffer contains a partial or invalid item. + fn decode_next(buf: &'a [u8]) -> Result, Error>; +} + /// Base trait for types that can be serialized to a byte stream. /// /// `WireFormat` provides the encoding half of the serialization contract. From 81116bad4e9306edddf93f478481973ea08ef721 Mon Sep 17 00:00:00 2001 From: Zach Heylmun Date: Thu, 2 Apr 2026 15:53:21 -0400 Subject: [PATCH 04/58] implement Encode + Decode for fixed-size services and primitives Add no_std-compatible Encode/Decode impls for: - All integer primitives (u8-u128, i8-i128), f32, f64 - DTCRecord (encode, decode, decode_iter) - TesterPresent (request + response) - DiagnosticSessionControl (request + response) - EcuReset (request + response) - CommunicationControl (request + response) - ControlDTCSettings (request + response) - ClearDiagnosticInfo (request) - RequestDownload (request, with stack-buffer encode replacing temp Vec) - NegativeResponse - Blanket Encode/Decode/DecodeIter for Identifier types Also adds Error::io() helper for embedded_io error conversion and disambiguates existing test code to use fully-qualified WireFormat calls. --- src/common/dtc_status.rs | 48 +++++++- src/common/primitive_generics.rs | 124 +++++++++++++++++++-- src/error.rs | 9 ++ src/services/clear_dtc_information.rs | 44 +++++++- src/services/communication_control.rs | 90 +++++++++++++-- src/services/control_dtc_settings.rs | 68 ++++++++++- src/services/diagnostic_session_control.rs | 75 ++++++++++++- src/services/ecu_reset.rs | 71 +++++++++++- src/services/negative_response.rs | 31 +++++- src/services/request_download.rs | 73 +++++++++++- src/services/tester_present.rs | 61 +++++++++- src/traits.rs | 54 ++++++++- 12 files changed, 692 insertions(+), 56 deletions(-) diff --git a/src/common/dtc_status.rs b/src/common/dtc_status.rs index 6a8a9e0..5e010d3 100644 --- a/src/common/dtc_status.rs +++ b/src/common/dtc_status.rs @@ -1,7 +1,7 @@ use bitmask_enum::bitmask; use byteorder_embedded_io::io::{ReadBytesExt, WriteBytesExt}; -use crate::{Error, IterableWireFormat, SingleValueWireFormat, WireFormat}; +use crate::{Decode, DecodeIter, Encode, Error, IterableWireFormat, SingleValueWireFormat, WireFormat}; /// Bit-packed DTC status information used by the `ReadDTCInformation` service /// @@ -269,6 +269,44 @@ impl IterableWireFormat for DTCRecord { } } +impl Encode for DTCRecord { + fn encoded_size(&self) -> usize { + 3 + } + + fn encode(&self, writer: &mut impl embedded_io::Write) -> Result { + writer + .write_all(&[self.high_byte, self.middle_byte, self.low_byte]) + .map_err(Error::io)?; + Ok(3) + } +} + +impl<'a> Decode<'a> for DTCRecord { + fn decode(buf: &'a [u8]) -> Result<(Self, &'a [u8]), crate::Error> { + if buf.len() < 3 { + return Err(Error::InsufficientData(3)); + } + Ok(( + Self { + high_byte: buf[0], + middle_byte: buf[1], + low_byte: buf[2], + }, + &buf[3..], + )) + } +} + +impl<'a> DecodeIter<'a> for DTCRecord { + fn decode_next(buf: &'a [u8]) -> Result, crate::Error> { + if buf.is_empty() { + return Ok(None); + } + Decode::decode(buf).map(Some) + } +} + /// Used to distinguish commands sent by the test equipment between different functional system groups /// within an electrical architecture which consists of many different servers. /// @@ -470,8 +508,8 @@ impl WireFormat for DTCSeverityRecord { fn encode(&self, writer: &mut T) -> Result { writer.write_u8(self.severity.bits())?; writer.write_u8(self.functional_group_identifier.value())?; - self.dtc_record.encode(writer)?; - self.dtc_status_mask.encode(writer)?; + WireFormat::encode(&self.dtc_record, writer)?; + WireFormat::encode(&self.dtc_status_mask, writer)?; Ok(self.required_size()) } } @@ -484,7 +522,7 @@ impl IterableWireFormat for DTCSeverityRecord { let severity = DTCSeverityMask::from(sev); let functional_group_identifier = FunctionalGroupIdentifier::from(reader.read_u8()?); - let dtc_record = DTCRecord::decode(reader)?; + let dtc_record = ::decode(reader)?; let dtc_status_mask = DTCStatusMask::from(reader.read_u8()?); Ok(Some(Self { @@ -528,7 +566,7 @@ mod dtc_status_tests { fn dtc_record() { let record = DTCRecord::new(0x01, 0x02, 0x03); let mut writer = Vec::new(); - let written_number = record.encode(&mut writer).unwrap(); + let written_number = WireFormat::encode(&record, &mut writer).unwrap(); assert_eq!(record.required_size(), 3); assert_eq!(written_number, 3); } diff --git a/src/common/primitive_generics.rs b/src/common/primitive_generics.rs index 5eb81de..818a5a3 100644 --- a/src/common/primitive_generics.rs +++ b/src/common/primitive_generics.rs @@ -1,4 +1,4 @@ -use crate::{Error, SingleValueWireFormat, WireFormat}; +use crate::{Decode, Encode, Error, SingleValueWireFormat, WireFormat}; use byteorder_embedded_io::BigEndian; use byteorder_embedded_io::io::{ReadBytesExt, WriteBytesExt}; @@ -60,6 +60,108 @@ macro_rules! signed_primitive_wire_format { signed_primitive_wire_format!(i8, i16, i32, i64, i128); +/// Implement [`Encode`] and [`Decode`] for unsigned integer primitives (no_std-compatible). +macro_rules! unsigned_primitive_encode_decode { + ( $($primitive:ty), * ) => { + $( + impl Encode for $primitive { + fn encoded_size(&self) -> usize { + core::mem::size_of::<$primitive>() + } + fn encode(&self, writer: &mut impl embedded_io::Write) -> Result { + writer.write_all(&self.to_be_bytes()).map_err(Error::io)?; + Ok(self.encoded_size()) + } + } + impl<'a> Decode<'a> for $primitive { + fn decode(buf: &'a [u8]) -> Result<(Self, &'a [u8]), Error> { + const SIZE: usize = core::mem::size_of::<$primitive>(); + if buf.len() < SIZE { + return Err(Error::InsufficientData(SIZE)); + } + let (head, tail) = buf.split_at(SIZE); + let value = <$primitive>::from_be_bytes(head.try_into().unwrap()); + Ok((value, tail)) + } + } + )* + }; +} + +unsigned_primitive_encode_decode!(u8, u16, u32, u64, u128); + +/// Implement [`Encode`] and [`Decode`] for signed integer primitives (no_std-compatible). +macro_rules! signed_primitive_encode_decode { + ( $($primitive:ty), * ) => { + $( + impl Encode for $primitive { + fn encoded_size(&self) -> usize { + core::mem::size_of::<$primitive>() + } + fn encode(&self, writer: &mut impl embedded_io::Write) -> Result { + writer.write_all(&self.to_be_bytes()).map_err(Error::io)?; + Ok(self.encoded_size()) + } + } + impl<'a> Decode<'a> for $primitive { + fn decode(buf: &'a [u8]) -> Result<(Self, &'a [u8]), Error> { + const SIZE: usize = core::mem::size_of::<$primitive>(); + if buf.len() < SIZE { + return Err(Error::InsufficientData(SIZE)); + } + let (head, tail) = buf.split_at(SIZE); + let value = <$primitive>::from_be_bytes(head.try_into().unwrap()); + Ok((value, tail)) + } + } + )* + }; +} + +signed_primitive_encode_decode!(i8, i16, i32, i64, i128); + +impl Encode for f32 { + fn encoded_size(&self) -> usize { + 4 + } + fn encode(&self, writer: &mut impl embedded_io::Write) -> Result { + writer.write_all(&self.to_be_bytes()).map_err(Error::io)?; + Ok(4) + } +} + +impl<'a> Decode<'a> for f32 { + fn decode(buf: &'a [u8]) -> Result<(Self, &'a [u8]), Error> { + if buf.len() < 4 { + return Err(Error::InsufficientData(4)); + } + let (head, tail) = buf.split_at(4); + let value = f32::from_be_bytes(head.try_into().unwrap()); + Ok((value, tail)) + } +} + +impl Encode for f64 { + fn encoded_size(&self) -> usize { + 8 + } + fn encode(&self, writer: &mut impl embedded_io::Write) -> Result { + writer.write_all(&self.to_be_bytes()).map_err(Error::io)?; + Ok(8) + } +} + +impl<'a> Decode<'a> for f64 { + fn decode(buf: &'a [u8]) -> Result<(Self, &'a [u8]), Error> { + if buf.len() < 8 { + return Err(Error::InsufficientData(8)); + } + let (head, tail) = buf.split_at(8); + let value = f64::from_be_bytes(head.try_into().unwrap()); + Ok((value, tail)) + } +} + impl WireFormat for f32 { fn required_size(&self) -> usize { 4 @@ -104,12 +206,12 @@ mod tests { let data = vec![0xFF]; let mut reader = &data[..]; - let u8_byte = u8::decode(&mut reader).unwrap(); + let u8_byte = ::decode(&mut reader).unwrap(); assert_eq!(u8_byte, 0xFF); assert_eq!(u8_byte.required_size(), 1); let mut write_buffer = vec![]; - u8_byte.encode(&mut write_buffer).unwrap(); + WireFormat::encode(&u8_byte, &mut write_buffer).unwrap(); assert_eq!(write_buffer, data); } @@ -119,12 +221,12 @@ mod tests { let data = vec![0xFF, 0x01]; let mut reader = &data[..]; - let u16_byte = u16::decode(&mut reader).unwrap(); + let u16_byte = ::decode(&mut reader).unwrap(); assert_eq!(u16_byte, 0xFF01); assert_eq!(u16_byte.required_size(), 2); let mut write_buffer = vec![]; - u16_byte.encode(&mut write_buffer).unwrap(); + WireFormat::encode(&u16_byte, &mut write_buffer).unwrap(); assert_eq!(write_buffer, data); } @@ -134,12 +236,12 @@ mod tests { let data = vec![0xFF, 0x20, 0x02, 0x01]; let mut reader = &data[..]; - let u32_byte = u32::decode(&mut reader).unwrap(); + let u32_byte = ::decode(&mut reader).unwrap(); assert_eq!(u32_byte, 0xFF20_0201); assert_eq!(u32_byte.required_size(), 4); let mut write_buffer = vec![]; - u32_byte.encode(&mut write_buffer).unwrap(); + WireFormat::encode(&u32_byte, &mut write_buffer).unwrap(); assert_eq!(write_buffer, data); } @@ -149,12 +251,12 @@ mod tests { let data = vec![0xFF, 0x20, 0x02, 0x01, 0xFF, 0x20, 0x02, 0x01]; let mut reader = &data[..]; - let u64_byte = u64::decode(&mut reader).unwrap(); + let u64_byte = ::decode(&mut reader).unwrap(); assert_eq!(u64_byte, 0xFF20_0201_FF20_0201); assert_eq!(u64_byte.required_size(), 8); let mut write_buffer = vec![]; - u64_byte.encode(&mut write_buffer).unwrap(); + WireFormat::encode(&u64_byte, &mut write_buffer).unwrap(); assert_eq!(write_buffer, data); } @@ -167,12 +269,12 @@ mod tests { ]; let mut reader = &data[..]; - let u128_byte = u128::decode(&mut reader).unwrap(); + let u128_byte = ::decode(&mut reader).unwrap(); assert_eq!(u128_byte, 0xFF20_0201_FF20_0201_FF20_0201_FF20_0201); assert_eq!(u128_byte.required_size(), 16); let mut write_buffer = vec![]; - u128_byte.encode(&mut write_buffer).unwrap(); + WireFormat::encode(&u128_byte, &mut write_buffer).unwrap(); assert_eq!(write_buffer, data); } } diff --git a/src/error.rs b/src/error.rs index 279b878..20fd371 100644 --- a/src/error.rs +++ b/src/error.rs @@ -66,6 +66,15 @@ pub enum Error { ServiceNotImplemented(crate::UdsServiceType), } +impl Error { + /// Convert any `embedded_io::Error` into [`Error::IoError`]. + #[inline] + #[allow(clippy::needless_pass_by_value)] + pub(crate) fn io(e: E) -> Self { + Self::IoError(e.kind()) + } +} + impl From for Error { fn from(kind: embedded_io::ErrorKind) -> Self { Self::IoError(kind) diff --git a/src/services/clear_dtc_information.rs b/src/services/clear_dtc_information.rs index 31b0b48..9df56b3 100644 --- a/src/services/clear_dtc_information.rs +++ b/src/services/clear_dtc_information.rs @@ -1,5 +1,8 @@ //! `ClearDiagnosticInformation` (0x14) service implementation -use crate::{CLEAR_ALL_DTCS, DTCRecord, NegativeResponseCode, SingleValueWireFormat, WireFormat}; +use crate::{ + CLEAR_ALL_DTCS, DTCRecord, Decode, Encode, NegativeResponseCode, SingleValueWireFormat, + WireFormat, +}; use byteorder_embedded_io::io::{ReadBytesExt, WriteBytesExt}; /// Negative response codes @@ -48,6 +51,37 @@ impl ClearDiagnosticInfoRequest { } } +impl Encode for ClearDiagnosticInfoRequest { + fn encoded_size(&self) -> usize { + 4 // DTCRecord (3) + memory_selection (1) + } + + fn encode(&self, writer: &mut impl embedded_io::Write) -> Result { + let size = Encode::encode(&self.group_of_dtc, writer)?; + writer + .write_all(&[self.memory_selection]) + .map_err(crate::Error::io)?; + Ok(size + 1) + } +} + +impl<'a> Decode<'a> for ClearDiagnosticInfoRequest { + fn decode(buf: &'a [u8]) -> Result<(Self, &'a [u8]), crate::Error> { + let (group_of_dtc, buf) = ::decode(buf)?; + if buf.is_empty() { + return Err(crate::Error::InsufficientData(4)); + } + let memory_selection = buf[0]; + Ok(( + Self { + group_of_dtc, + memory_selection, + }, + &buf[1..], + )) + } +} + impl WireFormat for ClearDiagnosticInfoRequest { fn required_size(&self) -> usize { self.group_of_dtc.required_size() + 1 @@ -55,7 +89,7 @@ impl WireFormat for ClearDiagnosticInfoRequest { fn encode(&self, writer: &mut T) -> Result { let mut size = 0; - size += self.group_of_dtc.encode(writer)?; + size += WireFormat::encode(&self.group_of_dtc, writer)?; writer.write_u8(self.memory_selection)?; size += 1; Ok(size) @@ -64,7 +98,7 @@ impl WireFormat for ClearDiagnosticInfoRequest { impl SingleValueWireFormat for ClearDiagnosticInfoRequest { fn decode(reader: &mut T) -> Result { - let group_of_dtc = DTCRecord::decode(reader)?; + let group_of_dtc = ::decode(reader)?; let memory_selection = reader.read_u8()?; Ok(Self { @@ -83,11 +117,11 @@ mod request { fn decode_clear_dtc_info_request() { let bytes = [0xFF, 0xFF, 0xFF, 0x00]; let compare = ClearDiagnosticInfoRequest::new(CLEAR_ALL_DTCS, 0); - let req = ClearDiagnosticInfoRequest::decode(&mut &bytes[..]).unwrap(); + let req = ::decode(&mut &bytes[..]).unwrap(); assert_eq!(req, compare); let mut bytes = vec![]; - let written = req.encode(&mut bytes).unwrap(); + let written = WireFormat::encode(&req, &mut bytes).unwrap(); assert_eq!(bytes, [0xFF, 0xFF, 0xFF, 0x00]); assert_eq!(req.required_size(), written); } diff --git a/src/services/communication_control.rs b/src/services/communication_control.rs index c4ba16c..8e51222 100644 --- a/src/services/communication_control.rs +++ b/src/services/communication_control.rs @@ -1,6 +1,6 @@ //! `CommunicationControl` (0x28) service implementation use crate::{ - CommunicationControlType, CommunicationType, Error, NegativeResponseCode, + CommunicationControlType, CommunicationType, Decode, Encode, Error, NegativeResponseCode, SingleValueWireFormat, SuppressablePositiveResponse, WireFormat, }; use byteorder_embedded_io::BigEndian; @@ -83,6 +83,59 @@ impl CommunicationControlRequest { &COMMUNICATION_CONTROL_NEGATIVE_RESPONSE_CODES } } +impl Encode for CommunicationControlRequest { + fn encoded_size(&self) -> usize { + if self.node_id.is_some() { 4 } else { 2 } + } + + fn encode(&self, writer: &mut impl embedded_io::Write) -> Result { + writer + .write_all(&[u8::from(self.control_type), u8::from(self.communication_type)]) + .map_err(Error::io)?; + if let Some(id) = self.node_id { + writer.write_all(&id.to_be_bytes()).map_err(Error::io)?; + Ok(4) + } else { + Ok(2) + } + } +} + +impl<'a> Decode<'a> for CommunicationControlRequest { + fn decode(buf: &'a [u8]) -> Result<(Self, &'a [u8]), Error> { + if buf.len() < 2 { + return Err(Error::InsufficientData(2)); + } + let communication_enable = SuppressablePositiveResponse::try_from(buf[0])?; + let communication_type = CommunicationType::try_from(buf[1])?; + match communication_enable.value() { + CommunicationControlType::EnableRxAndDisableTxWithEnhancedAddressInfo + | CommunicationControlType::EnableRxAndTxWithEnhancedAddressInfo => { + if buf.len() < 4 { + return Err(Error::InsufficientData(4)); + } + let node_id = Some(u16::from_be_bytes([buf[2], buf[3]])); + Ok(( + Self { + control_type: communication_enable, + communication_type, + node_id, + }, + &buf[4..], + )) + } + _ => Ok(( + Self { + control_type: communication_enable, + communication_type, + node_id: None, + }, + &buf[2..], + )), + } + } +} + impl WireFormat for CommunicationControlRequest { fn required_size(&self) -> usize { if self.node_id.is_some() { 4 } else { 2 } @@ -140,6 +193,29 @@ impl CommunicationControlResponse { } } +impl Encode for CommunicationControlResponse { + fn encoded_size(&self) -> usize { + 1 + } + + fn encode(&self, writer: &mut impl embedded_io::Write) -> Result { + writer + .write_all(&[u8::from(self.control_type)]) + .map_err(Error::io)?; + Ok(1) + } +} + +impl<'a> Decode<'a> for CommunicationControlResponse { + fn decode(buf: &'a [u8]) -> Result<(Self, &'a [u8]), Error> { + if buf.is_empty() { + return Err(Error::InsufficientData(1)); + } + let control_type = CommunicationControlType::try_from(buf[0])?; + Ok((Self::new(control_type), &buf[1..])) + } +} + impl WireFormat for CommunicationControlResponse { fn required_size(&self) -> usize { 1 @@ -165,7 +241,7 @@ mod request { #[test] fn simple_request() { let bytes: [u8; 3] = [0x01, 0x02, 0x03]; - let req = CommunicationControlRequest::decode(&mut bytes.as_slice()).unwrap(); + let req = ::decode(&mut bytes.as_slice()).unwrap(); assert_eq!( req.control_type(), CommunicationControlType::EnableRxAndDisableTx @@ -174,7 +250,7 @@ mod request { assert_eq!(req.node_id, None); let mut buffer = Vec::new(); - let written = req.encode(&mut buffer).unwrap(); + let written = WireFormat::encode(&req, &mut buffer).unwrap(); assert_eq!(written, req.required_size()); assert_eq!(buffer.len(), req.required_size()); } @@ -182,7 +258,7 @@ mod request { #[test] fn node_id() { let bytes: [u8; 4] = [0x05, 0x02, 0x01, 0x02]; - let req = CommunicationControlRequest::decode(&mut bytes.as_slice()).unwrap(); + let req = ::decode(&mut bytes.as_slice()).unwrap(); assert_eq!( req.control_type(), CommunicationControlType::EnableRxAndTxWithEnhancedAddressInfo @@ -191,7 +267,7 @@ mod request { assert_eq!(req.node_id, Some(258)); let mut buffer = Vec::new(); - let written = req.encode(&mut buffer).unwrap(); + let written = WireFormat::encode(&req, &mut buffer).unwrap(); assert_eq!(written, req.required_size()); assert_eq!(buffer.len(), req.required_size()); } @@ -227,14 +303,14 @@ mod response { #[test] fn simple_response() { let bytes: [u8; 1] = [0x01]; - let res = CommunicationControlResponse::decode(&mut bytes.as_slice()).unwrap(); + let res = ::decode(&mut bytes.as_slice()).unwrap(); assert_eq!( res.control_type, CommunicationControlType::EnableRxAndDisableTx ); let mut buffer = Vec::new(); - let written = res.encode(&mut buffer).unwrap(); + let written = WireFormat::encode(&res, &mut buffer).unwrap(); assert_eq!(written, 1); assert_eq!(buffer.len(), written); } diff --git a/src/services/control_dtc_settings.rs b/src/services/control_dtc_settings.rs index 6794821..38b3349 100644 --- a/src/services/control_dtc_settings.rs +++ b/src/services/control_dtc_settings.rs @@ -1,5 +1,5 @@ //! `ControlDTCSetting` (0x85) service implementation -use crate::{DtcSettings, Error, SUCCESS, SingleValueWireFormat, WireFormat}; +use crate::{Decode, DtcSettings, Encode, Error, SUCCESS, SingleValueWireFormat, WireFormat}; use byteorder_embedded_io::io::{ReadBytesExt, WriteBytesExt}; /// The `ControlDTCSettings` service is used to control the DTC settings of the ECU. @@ -23,6 +23,41 @@ impl ControlDTCSettingsRequest { } } +impl Encode for ControlDTCSettingsRequest { + fn encoded_size(&self) -> usize { + 1 + } + + fn encode(&self, writer: &mut impl embedded_io::Write) -> Result { + let request_byte = + u8::from(self.setting) | if self.suppress_response { SUCCESS } else { 0 }; + writer.write_all(&[request_byte]).map_err(Error::io)?; + Ok(1) + } + + fn is_positive_response_suppressed(&self) -> bool { + self.suppress_response + } +} + +impl<'a> Decode<'a> for ControlDTCSettingsRequest { + fn decode(buf: &'a [u8]) -> Result<(Self, &'a [u8]), Error> { + if buf.is_empty() { + return Err(Error::InsufficientData(1)); + } + let request_byte = buf[0]; + let setting = DtcSettings::try_from(request_byte & !SUCCESS)?; + let suppress_response = request_byte & SUCCESS != 0; + Ok(( + Self { + setting, + suppress_response, + }, + &buf[1..], + )) + } +} + impl WireFormat for ControlDTCSettingsRequest { fn required_size(&self) -> usize { 1 @@ -70,6 +105,29 @@ impl ControlDTCSettingsResponse { } } +impl Encode for ControlDTCSettingsResponse { + fn encoded_size(&self) -> usize { + 1 + } + + fn encode(&self, writer: &mut impl embedded_io::Write) -> Result { + writer + .write_all(&[u8::from(self.setting)]) + .map_err(Error::io)?; + Ok(1) + } +} + +impl<'a> Decode<'a> for ControlDTCSettingsResponse { + fn decode(buf: &'a [u8]) -> Result<(Self, &'a [u8]), Error> { + if buf.is_empty() { + return Err(Error::InsufficientData(1)); + } + let setting = DtcSettings::try_from(buf[0])?; + Ok((Self { setting }, &buf[1..])) + } +} + impl WireFormat for ControlDTCSettingsResponse { fn required_size(&self) -> usize { 1 @@ -97,12 +155,12 @@ mod request { fn simple_request() { let req = ControlDTCSettingsRequest::new(DtcSettings::On, true); let mut buffer = Vec::new(); - let written = req.encode(&mut buffer).unwrap(); + let written = WireFormat::encode(&req, &mut buffer).unwrap(); assert_eq!(buffer, vec![0x81]); assert_eq!(written, buffer.len()); assert_eq!(req.required_size(), buffer.len()); - let parsed = ControlDTCSettingsRequest::decode(&mut buffer.as_slice()).unwrap(); + let parsed = ::decode(&mut buffer.as_slice()).unwrap(); assert_eq!(parsed.setting, DtcSettings::On); assert!(parsed.suppress_response); } @@ -117,12 +175,12 @@ mod response { fn simple_response() { let req = ControlDTCSettingsResponse::new(DtcSettings::On); let mut buffer = Vec::new(); - let written = req.encode(&mut buffer).unwrap(); + let written = WireFormat::encode(&req, &mut buffer).unwrap(); assert_eq!(buffer, vec![0x01]); assert_eq!(written, buffer.len()); assert_eq!(req.required_size(), buffer.len()); - let parsed = ControlDTCSettingsResponse::decode(&mut buffer.as_slice()).unwrap(); + let parsed = ::decode(&mut buffer.as_slice()).unwrap(); assert_eq!(parsed.setting, DtcSettings::On); } } diff --git a/src/services/diagnostic_session_control.rs b/src/services/diagnostic_session_control.rs index b1be16c..422b7f9 100644 --- a/src/services/diagnostic_session_control.rs +++ b/src/services/diagnostic_session_control.rs @@ -10,7 +10,7 @@ //! as well as in other operation conditions defined by the vehicle manufacturer (e.g. limp home operation condition). use crate::{ - DiagnosticSessionType, Error, NegativeResponseCode, SingleValueWireFormat, + Decode, DiagnosticSessionType, Encode, Error, NegativeResponseCode, SingleValueWireFormat, SuppressablePositiveResponse, WireFormat, }; use byteorder_embedded_io::io::{ReadBytesExt, WriteBytesExt}; @@ -61,6 +61,33 @@ impl DiagnosticSessionControlRequest { &DIAGNOSTIC_SESSION_CONTROL_NEGATIVE_RESPONSE_CODES } } +impl Encode for DiagnosticSessionControlRequest { + fn encoded_size(&self) -> usize { + 1 + } + + fn encode(&self, writer: &mut impl embedded_io::Write) -> Result { + writer + .write_all(&[u8::from(self.session_type)]) + .map_err(Error::io)?; + Ok(1) + } + + fn is_positive_response_suppressed(&self) -> bool { + self.suppress_positive_response() + } +} + +impl<'a> Decode<'a> for DiagnosticSessionControlRequest { + fn decode(buf: &'a [u8]) -> Result<(Self, &'a [u8]), Error> { + if buf.is_empty() { + return Err(Error::InsufficientData(1)); + } + let session_type = SuppressablePositiveResponse::try_from(buf[0])?; + Ok((Self { session_type }, &buf[1..])) + } +} + impl WireFormat for DiagnosticSessionControlRequest { fn required_size(&self) -> usize { 1 @@ -111,6 +138,44 @@ impl DiagnosticSessionControlResponse { } } } +impl Encode for DiagnosticSessionControlResponse { + fn encoded_size(&self) -> usize { + 5 + } + + fn encode(&self, writer: &mut impl embedded_io::Write) -> Result { + writer + .write_all(&[u8::from(self.session_type)]) + .map_err(Error::io)?; + writer + .write_all(&self.p2_server_max.to_be_bytes()) + .map_err(Error::io)?; + writer + .write_all(&self.p2_star_server_max.to_be_bytes()) + .map_err(Error::io)?; + Ok(5) + } +} + +impl<'a> Decode<'a> for DiagnosticSessionControlResponse { + fn decode(buf: &'a [u8]) -> Result<(Self, &'a [u8]), Error> { + if buf.len() < 5 { + return Err(Error::InsufficientData(5)); + } + let session_type = DiagnosticSessionType::try_from(buf[0])?; + let p2_server_max = u16::from_be_bytes([buf[1], buf[2]]); + let p2_star_server_max = u16::from_be_bytes([buf[3], buf[4]]); + Ok(( + Self { + session_type, + p2_server_max, + p2_star_server_max, + }, + &buf[5..], + )) + } +} + impl WireFormat for DiagnosticSessionControlResponse { fn required_size(&self) -> usize { 5 @@ -147,7 +212,7 @@ mod request { fn test_diagnostic_session_control_request() { let bytes: [u8; 1] = [0x02]; let req: DiagnosticSessionControlRequest = - DiagnosticSessionControlRequest::decode(&mut bytes.as_slice()).unwrap(); + ::decode(&mut bytes.as_slice()).unwrap(); assert!(!req.suppress_positive_response()); assert_eq!( req.session_type(), @@ -155,7 +220,7 @@ mod request { ); let mut buffer = Vec::new(); - req.encode(&mut buffer).unwrap(); + WireFormat::encode(&req, &mut buffer).unwrap(); assert_eq!(buffer, bytes); assert_eq!(req.required_size(), 1); } @@ -170,13 +235,13 @@ mod response { fn test_diagnostic_session_control_response() { let bytes = [0x02, 0x11, 0x22, 0x33, 0x44]; let resp: DiagnosticSessionControlResponse = - DiagnosticSessionControlResponse::decode(&mut bytes.as_slice()).unwrap(); + ::decode(&mut bytes.as_slice()).unwrap(); assert_eq!(resp.session_type, DiagnosticSessionType::ProgrammingSession); assert_eq!(resp.p2_server_max, 0x1122); assert_eq!(resp.p2_star_server_max, 0x3344); let mut buffer = Vec::new(); - resp.encode(&mut buffer).unwrap(); + WireFormat::encode(&resp, &mut buffer).unwrap(); assert_eq!(buffer, bytes); assert_eq!(resp.required_size(), 5); } diff --git a/src/services/ecu_reset.rs b/src/services/ecu_reset.rs index fdd8dcb..48f75c8 100644 --- a/src/services/ecu_reset.rs +++ b/src/services/ecu_reset.rs @@ -1,7 +1,7 @@ //! `ECUReset` (0x11) service implementation use crate::{ - Error, NegativeResponseCode, ResetType, SingleValueWireFormat, SuppressablePositiveResponse, - WireFormat, + Decode, Encode, Error, NegativeResponseCode, ResetType, SingleValueWireFormat, + SuppressablePositiveResponse, WireFormat, }; use byteorder_embedded_io::io::{ReadBytesExt, WriteBytesExt}; use std::io::{Read, Write}; @@ -48,6 +48,33 @@ impl EcuResetRequest { } } +impl Encode for EcuResetRequest { + fn encoded_size(&self) -> usize { + 1 + } + + fn encode(&self, writer: &mut impl embedded_io::Write) -> Result { + writer + .write_all(&[u8::from(self.reset_type)]) + .map_err(Error::io)?; + Ok(1) + } + + fn is_positive_response_suppressed(&self) -> bool { + self.suppress_positive_response() + } +} + +impl<'a> Decode<'a> for EcuResetRequest { + fn decode(buf: &'a [u8]) -> Result<(Self, &'a [u8]), Error> { + if buf.is_empty() { + return Err(Error::InsufficientData(1)); + } + let reset_type = SuppressablePositiveResponse::try_from(buf[0])?; + Ok((Self { reset_type }, &buf[1..])) + } +} + impl WireFormat for EcuResetRequest { fn required_size(&self) -> usize { 1 @@ -92,6 +119,38 @@ impl EcuResetResponse { } } +impl Encode for EcuResetResponse { + fn encoded_size(&self) -> usize { + 2 + } + + fn encode(&self, writer: &mut impl embedded_io::Write) -> Result { + writer + .write_all(&[u8::from(self.reset_type), self.power_down_time]) + .map_err(Error::io)?; + Ok(2) + } +} + +impl<'a> Decode<'a> for EcuResetResponse { + fn decode(buf: &'a [u8]) -> Result<(Self, &'a [u8]), Error> { + if buf.is_empty() { + return Err(Error::InsufficientData(1)); + } + let reset_type = ResetType::try_from(buf[0])?; + // powerDownTime is conditional per ISO 14229-1 + let power_down_time = buf.get(1).copied().unwrap_or(0); + let consumed = core::cmp::min(buf.len(), 2); + Ok(( + Self { + reset_type, + power_down_time, + }, + &buf[consumed..], + )) + } +} + impl WireFormat for EcuResetResponse { fn required_size(&self) -> usize { 2 @@ -126,8 +185,8 @@ mod request { let bytes: [u8; 2] = [0x81, 0x00]; let req = EcuResetRequest::new(true, ResetType::HardReset); let mut buffer = Vec::new(); - let written = req.encode(&mut buffer).unwrap(); - let result = EcuResetRequest::decode(&mut bytes.as_slice()).unwrap(); + let written = WireFormat::encode(&req, &mut buffer).unwrap(); + let result = ::decode(&mut bytes.as_slice()).unwrap(); assert_eq!(result, req); assert_eq!(written, 1); @@ -144,8 +203,8 @@ mod response { let bytes: [u8; 2] = [0x01, 0x20]; let resp = EcuResetResponse::new(ResetType::HardReset, 0x20); let mut buffer = Vec::new(); - let written = resp.encode(&mut buffer).unwrap(); - let result = EcuResetResponse::decode(&mut bytes.as_slice()).unwrap(); + let written = WireFormat::encode(&resp, &mut buffer).unwrap(); + let result = ::decode(&mut bytes.as_slice()).unwrap(); assert_eq!(result, resp); assert_eq!(written, 2); diff --git a/src/services/negative_response.rs b/src/services/negative_response.rs index b6c2dde..69cdad6 100644 --- a/src/services/negative_response.rs +++ b/src/services/negative_response.rs @@ -1,5 +1,7 @@ //! `NegativeResponse` (0x7F) service implementation -use crate::{Error, NegativeResponseCode, SingleValueWireFormat, UdsServiceType, WireFormat}; +use crate::{ + Decode, Encode, Error, NegativeResponseCode, SingleValueWireFormat, UdsServiceType, WireFormat, +}; use byteorder_embedded_io::io::{ReadBytesExt, WriteBytesExt}; /// A negative response from the server indicating a request could not be fulfilled @@ -24,6 +26,33 @@ impl NegativeResponse { } } +impl Encode for NegativeResponse { + fn encoded_size(&self) -> usize { + 2 + } + + fn encode(&self, writer: &mut impl embedded_io::Write) -> Result { + writer + .write_all(&[ + self.request_service.request_service_to_byte(), + u8::from(self.nrc), + ]) + .map_err(Error::io)?; + Ok(2) + } +} + +impl<'a> Decode<'a> for NegativeResponse { + fn decode(buf: &'a [u8]) -> Result<(Self, &'a [u8]), Error> { + if buf.len() < 2 { + return Err(Error::InsufficientData(2)); + } + let request_service = UdsServiceType::service_from_request_byte(buf[0]); + let nrc = NegativeResponseCode::from(buf[1]); + Ok((Self { request_service, nrc }, &buf[2..])) + } +} + impl WireFormat for NegativeResponse { fn required_size(&self) -> usize { 2 diff --git a/src/services/request_download.rs b/src/services/request_download.rs index 343cd39..55a98f3 100644 --- a/src/services/request_download.rs +++ b/src/services/request_download.rs @@ -2,7 +2,7 @@ use byteorder_embedded_io::io::{ReadBytesExt, WriteBytesExt}; use crate::{ - DataFormatIdentifier, Error, LengthFormatIdentifier, MemoryFormatIdentifier, + DataFormatIdentifier, Decode, Encode, Error, LengthFormatIdentifier, MemoryFormatIdentifier, NegativeResponseCode, SingleValueWireFormat, WireFormat, }; @@ -87,6 +87,71 @@ impl RequestDownloadRequest { &REQUEST_DOWNLOAD_NEGATIVE_RESPONSE_CODES } } +impl Encode for RequestDownloadRequest { + fn encoded_size(&self) -> usize { + 2 + self.address_and_length_format_identifier.len() + } + + fn encode(&self, writer: &mut impl embedded_io::Write) -> Result { + writer + .write_all(&[ + self.data_format_identifier.into(), + self.address_and_length_format_identifier.into(), + ]) + .map_err(Error::io)?; + + // Write shortened memory address using a stack buffer instead of Vec + let addr_bytes = self.memory_address.to_be_bytes(); + let addr_len = self.address_and_length_format_identifier.memory_address_length as usize; + writer + .write_all(&addr_bytes[8 - addr_len..]) + .map_err(Error::io)?; + + // Write shortened memory size using a stack buffer instead of Vec + let size_bytes = self.memory_size.to_be_bytes(); + let size_len = self.address_and_length_format_identifier.memory_size_length as usize; + writer + .write_all(&size_bytes[4 - size_len..]) + .map_err(Error::io)?; + + Ok(self.encoded_size()) + } +} + +impl<'a> Decode<'a> for RequestDownloadRequest { + fn decode(buf: &'a [u8]) -> Result<(Self, &'a [u8]), Error> { + if buf.len() < 2 { + return Err(Error::InsufficientData(2)); + } + let data_format_identifier = DataFormatIdentifier::from(buf[0]); + let memory_identifier = MemoryFormatIdentifier::try_from(buf[1])?; + let addr_len = memory_identifier.memory_address_length as usize; + let size_len = memory_identifier.memory_size_length as usize; + let total = 2 + addr_len + size_len; + if buf.len() < total { + return Err(Error::InsufficientData(total)); + } + + let mut addr_bytes = [0u8; 8]; + addr_bytes[8 - addr_len..].copy_from_slice(&buf[2..2 + addr_len]); + let memory_address = u64::from_be_bytes(addr_bytes); + + let mut size_bytes = [0u8; 4]; + size_bytes[4 - size_len..].copy_from_slice(&buf[2 + addr_len..total]); + let memory_size = u32::from_be_bytes(size_bytes); + + Ok(( + Self { + data_format_identifier, + address_and_length_format_identifier: memory_identifier, + memory_address, + memory_size, + }, + &buf[total..], + )) + } +} + impl WireFormat for RequestDownloadRequest { fn required_size(&self) -> usize { 2 + self.address_and_length_format_identifier.len() @@ -192,7 +257,7 @@ mod tests { 0xF0, 0xFF, 0xFF, 0x67, // memory address 0x0A, ]; - let req = RequestDownloadRequest::decode(&mut bytes.as_slice()).unwrap(); + let req = ::decode(&mut bytes.as_slice()).unwrap(); assert_eq!(u8::from(req.data_format_identifier), 0); assert_eq!(u8::from(req.address_and_length_format_identifier), 0x14); @@ -223,7 +288,7 @@ mod tests { 0x11, // 1 byte for memory size, 1 byte for memory address 0x67, ]; - let req = RequestDownloadRequest::decode(&mut bytes.as_slice()); + let req = ::decode(&mut bytes.as_slice()); assert!(matches!(req, Err(Error::IoError(_)))); } @@ -249,7 +314,7 @@ mod tests { let req = RequestDownloadRequest::new(0x00.into(), 0xF0_FF_FF_67, 0x0A).unwrap(); let mut vec = vec![]; - req.encode(&mut vec).unwrap(); + WireFormat::encode(&req, &mut vec).unwrap(); assert_eq!(vec.len(), req.required_size()); } diff --git a/src/services/tester_present.rs b/src/services/tester_present.rs index 8b89c0b..b8c7287 100644 --- a/src/services/tester_present.rs +++ b/src/services/tester_present.rs @@ -1,6 +1,7 @@ //! `TesterPresent` (0x3E) service implementation use crate::{ - Error, NegativeResponseCode, SingleValueWireFormat, SuppressablePositiveResponse, WireFormat, + Decode, Encode, Error, NegativeResponseCode, SingleValueWireFormat, + SuppressablePositiveResponse, WireFormat, }; use byteorder_embedded_io::io::{ReadBytesExt, WriteBytesExt}; @@ -100,6 +101,33 @@ impl TesterPresentRequest { } } +impl Encode for TesterPresentRequest { + fn encoded_size(&self) -> usize { + 1 + } + + fn encode(&self, writer: &mut impl embedded_io::Write) -> Result { + writer + .write_all(&[u8::from(self.zero_sub_function)]) + .map_err(Error::io)?; + Ok(1) + } + + fn is_positive_response_suppressed(&self) -> bool { + self.suppress_positive_response() + } +} + +impl<'a> Decode<'a> for TesterPresentRequest { + fn decode(buf: &'a [u8]) -> Result<(Self, &'a [u8]), Error> { + if buf.is_empty() { + return Err(Error::InsufficientData(1)); + } + let zero_sub_function = SuppressablePositiveResponse::try_from(buf[0])?; + Ok((Self { zero_sub_function }, &buf[1..])) + } +} + impl WireFormat for TesterPresentRequest { fn required_size(&self) -> usize { 1 @@ -140,6 +168,29 @@ impl TesterPresentResponse { } } +impl Encode for TesterPresentResponse { + fn encoded_size(&self) -> usize { + 1 + } + + fn encode(&self, writer: &mut impl embedded_io::Write) -> Result { + writer + .write_all(&[u8::from(self.zero_sub_function)]) + .map_err(Error::io)?; + Ok(1) + } +} + +impl<'a> Decode<'a> for TesterPresentResponse { + fn decode(buf: &'a [u8]) -> Result<(Self, &'a [u8]), Error> { + if buf.is_empty() { + return Err(Error::InsufficientData(1)); + } + let zero_sub_function = ZeroSubFunction::try_from(buf[0])?; + Ok((Self { zero_sub_function }, &buf[1..])) + } +} + impl WireFormat for TesterPresentResponse { fn required_size(&self) -> usize { 1 @@ -195,7 +246,7 @@ mod test { fn make_request(byte: u8) -> Result { let bytes = vec![byte]; - TesterPresentRequest::decode(&mut bytes.as_slice()) + ::decode(&mut bytes.as_slice()) } #[test] @@ -235,7 +286,7 @@ mod test { fn write_request_type() { let test_type = TesterPresentRequest::new(false); let mut buffer = Vec::new(); - test_type.encode(&mut buffer).unwrap(); + WireFormat::encode(&test_type, &mut buffer).unwrap(); let expected_bytes = vec![0]; assert_eq!(buffer, expected_bytes); @@ -244,7 +295,7 @@ mod test { #[test] fn read_response_type() { let bytes = vec![0u8]; - let test_type = TesterPresentResponse::decode(&mut bytes.as_slice()).unwrap(); + let test_type = ::decode(&mut bytes.as_slice()).unwrap(); assert_eq!(test_type, TesterPresentResponse::new()); } @@ -252,7 +303,7 @@ mod test { fn write_response_type() { let test_type = TesterPresentResponse::new(); let mut buffer = Vec::new(); - test_type.encode(&mut buffer).unwrap(); + WireFormat::encode(&test_type, &mut buffer).unwrap(); let expected_bytes = vec![0]; assert_eq!(buffer, expected_bytes); diff --git a/src/traits.rs b/src/traits.rs index 85b4e8b..d398fdf 100644 --- a/src/traits.rs +++ b/src/traits.rs @@ -200,7 +200,7 @@ pub trait Identifier: TryFrom + Into + Clone + Copy + maybe_serde::Bou /// - if the stream is not in the expected format /// - if the stream contains partial data fn parse_from_payload(reader: &mut R) -> Result, Error> { - Self::decode_next(reader) + ::decode_next(reader) } } @@ -222,6 +222,56 @@ macro_rules! impl_identifier { /// Marker subtrait of [`Identifier`] to distinguish routine identifiers from data identifiers. pub trait RoutineIdentifier: Identifier {} +/// Blanket implementation of [`Encode`] for types that implement [`Identifier`] +impl Encode for T +where + T: Identifier, +{ + fn encoded_size(&self) -> usize { + 2 + } + + fn encode(&self, writer: &mut impl embedded_io::Write) -> Result { + writer + .write_all(&>::into((*self).into()).to_be_bytes()) + .map_err(Error::io)?; + Ok(2) + } +} + +/// Blanket implementation of [`Decode`] for types that implement [`Identifier`] +impl<'a, T> Decode<'a> for T +where + T: Identifier, +{ + fn decode(buf: &'a [u8]) -> Result<(Self, &'a [u8]), Error> { + if buf.len() < 2 { + return Err(Error::IncorrectMessageLengthOrInvalidFormat); + } + let raw = u16::from_be_bytes([buf[0], buf[1]]); + match Self::try_from(raw) { + Ok(identifier) => Ok((identifier, &buf[2..])), + Err(_) => Err(Error::InvalidDiagnosticIdentifier(raw)), + } + } +} + +/// Blanket implementation of [`DecodeIter`] for types that implement [`Identifier`] +impl<'a, T> DecodeIter<'a> for T +where + T: Identifier, +{ + fn decode_next(buf: &'a [u8]) -> Result, Error> { + if buf.is_empty() { + return Ok(None); + } + if buf.len() < 2 { + return Err(Error::IncorrectMessageLengthOrInvalidFormat); + } + Decode::decode(buf).map(Some) + } +} + /// Blanket implementation of [`WireFormat`] for types that implement [`Identifier`] impl WireFormat for T where @@ -388,7 +438,7 @@ mod tests { fn test_identifier() { let mut buffer = Cursor::new(vec![0u8; 2]); let identifier = MyIdentifier::Identifier1; - identifier.encode(&mut buffer).unwrap(); + WireFormat::encode(&identifier, &mut buffer).unwrap(); buffer.set_position(0); let read_identifier = MyIdentifier::parse_from_list(&mut buffer).unwrap(); assert_eq!(identifier, read_identifier[0]); From 5a2a6a76feea61ea6a6f4410f082f6f7c6c69cc7 Mon Sep 17 00:00:00 2001 From: Zach Heylmun Date: Thu, 2 Apr 2026 21:57:09 -0400 Subject: [PATCH 05/58] add zero-alloc TX types for variable-length services Create borrowed TX types alongside existing Vec-based types: - TransferDataRequestTx<'d> / TransferDataResponseTx<'d> - SecurityAccessRequestTx<'d> / SecurityAccessResponseTx<'d> - RequestDownloadResponseTx<'d> - ReadDataByIdentifierRequestTx<'d, DID> - ProtocolPayloadTx<'d> / ProtocolRoutinePayloadTx<'d> All TX types use &'d [u8] or &'d [T] instead of Vec, implement Encode + Decode, and support const fn construction where possible. --- src/lib.rs | 5 +- src/protocol_definitions.rs | 146 +++++++++++++++++++++++- src/services/mod.rs | 17 ++- src/services/read_data_by_identifier.rs | 39 ++++++- src/services/request_download.rs | 60 ++++++++++ src/services/security_access.rs | 130 ++++++++++++++++++++- src/services/transfer_data.rs | 104 ++++++++++++++++- 7 files changed, 488 insertions(+), 13 deletions(-) diff --git a/src/lib.rs b/src/lib.rs index 115c430..86a422d 100644 --- a/src/lib.rs +++ b/src/lib.rs @@ -14,7 +14,10 @@ mod common; pub use common::*; mod protocol_definitions; -pub use protocol_definitions::{ProtocolIdentifier, ProtocolPayload, ProtocolRoutinePayload}; +pub use protocol_definitions::{ + ProtocolIdentifier, ProtocolPayload, ProtocolPayloadTx, ProtocolRoutinePayload, + ProtocolRoutinePayloadTx, +}; mod request; pub use request::Request; diff --git a/src/protocol_definitions.rs b/src/protocol_definitions.rs index b790f14..8fd2ee7 100644 --- a/src/protocol_definitions.rs +++ b/src/protocol_definitions.rs @@ -1,6 +1,6 @@ use crate::{ - Error, IterableWireFormat, SingleValueWireFormat, UDSIdentifier, UDSRoutineIdentifier, - WireFormat, impl_identifier, + Decode, DecodeIter, Encode, Error, IterableWireFormat, SingleValueWireFormat, UDSIdentifier, + UDSRoutineIdentifier, WireFormat, impl_identifier, }; use std::ops::Deref; use tracing::error; @@ -80,7 +80,7 @@ impl WireFormat for ProtocolPayload { } fn encode(&self, writer: &mut T) -> Result { - self.identifier.encode(writer)?; + WireFormat::encode(&self.identifier, writer)?; writer.write_all(&self.payload)?; Ok(self.required_size()) } @@ -252,6 +252,146 @@ impl core::fmt::Debug for ProtocolRoutinePayload { } } +// --------------------------------------------------------------------------- +// no_std TX/RX types (borrow from caller/wire buffer) +// --------------------------------------------------------------------------- + +/// Zero-alloc protocol payload. Borrows the raw payload bytes. +#[derive(Clone, Copy, Eq, PartialEq)] +pub struct ProtocolPayloadTx<'d> { + /// The UDS data identifier this payload belongs to. + pub identifier: UDSIdentifier, + /// The raw payload bytes following the identifier. + pub payload: &'d [u8], +} + +impl<'d> ProtocolPayloadTx<'d> { + /// Creates a new `ProtocolPayloadTx`. + #[must_use] + pub const fn new(identifier: UDSIdentifier, payload: &'d [u8]) -> Self { + Self { + identifier, + payload, + } + } +} + +impl Encode for ProtocolPayloadTx<'_> { + fn encoded_size(&self) -> usize { + 2 + self.payload.len() + } + + fn encode(&self, writer: &mut impl embedded_io::Write) -> Result { + Encode::encode(&self.identifier, writer)?; + writer.write_all(self.payload).map_err(Error::io)?; + Ok(self.encoded_size()) + } +} + +impl<'a> Decode<'a> for ProtocolPayloadTx<'a> { + fn decode(buf: &'a [u8]) -> Result<(Self, &'a [u8]), Error> { + if buf.len() < 2 { + return Err(Error::IncorrectMessageLengthOrInvalidFormat); + } + let (identifier, rest) = ::decode(buf)?; + // Consumes all remaining bytes as payload + Ok(( + Self { + identifier, + payload: rest, + }, + &[], + )) + } +} + +impl<'a> DecodeIter<'a> for ProtocolPayloadTx<'a> { + fn decode_next(buf: &'a [u8]) -> Result, Error> { + if buf.is_empty() { + return Ok(None); + } + Decode::decode(buf).map(Some) + } +} + +impl core::fmt::Debug for ProtocolPayloadTx<'_> { + fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result { + write!(f, "{} =>", self.identifier)?; + for b in self.payload { + write!(f, " {b:02X}")?; + } + Ok(()) + } +} + +/// Zero-alloc routine payload. Borrows the raw payload bytes. +#[derive(Clone, Copy, Eq, PartialEq)] +pub struct ProtocolRoutinePayloadTx<'d> { + /// The routine identifier this payload belongs to. + pub identifier: UDSRoutineIdentifier, + /// The raw payload bytes following the identifier. + pub payload: &'d [u8], +} + +impl<'d> ProtocolRoutinePayloadTx<'d> { + /// Creates a new `ProtocolRoutinePayloadTx`. + #[must_use] + pub const fn new(identifier: UDSRoutineIdentifier, payload: &'d [u8]) -> Self { + Self { + identifier, + payload, + } + } +} + +impl Encode for ProtocolRoutinePayloadTx<'_> { + /// Size of the raw payload only — the identifier is written by the request. + fn encoded_size(&self) -> usize { + self.payload.len() + } + + fn encode(&self, writer: &mut impl embedded_io::Write) -> Result { + writer.write_all(self.payload).map_err(Error::io)?; + Ok(self.payload.len()) + } +} + +impl<'a> Decode<'a> for ProtocolRoutinePayloadTx<'a> { + fn decode(buf: &'a [u8]) -> Result<(Self, &'a [u8]), Error> { + if buf.len() < 2 { + return Err(Error::IncorrectMessageLengthOrInvalidFormat); + } + let raw = u16::from_be_bytes([buf[0], buf[1]]); + let identifier = UDSRoutineIdentifier::from(raw); + Ok(( + Self { + identifier, + payload: &buf[2..], + }, + &[], + )) + } +} + +impl<'a> DecodeIter<'a> for ProtocolRoutinePayloadTx<'a> { + fn decode_next(buf: &'a [u8]) -> Result, Error> { + if buf.is_empty() { + return Ok(None); + } + Decode::decode(buf).map(Some) + } +} + +impl core::fmt::Debug for ProtocolRoutinePayloadTx<'_> { + fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result { + write!(f, "{:?} =>", self.identifier)?; + for b in self.payload { + write!(f, " {b:02X}")?; + } + Ok(()) + } +} + #[cfg(test)] mod tests { diff --git a/src/services/mod.rs b/src/services/mod.rs index 4fa5330..addf792 100644 --- a/src/services/mod.rs +++ b/src/services/mod.rs @@ -19,13 +19,17 @@ mod negative_response; pub use negative_response::NegativeResponse; mod read_data_by_identifier; -pub use read_data_by_identifier::{ReadDataByIdentifierRequest, ReadDataByIdentifierResponse}; +pub use read_data_by_identifier::{ + ReadDataByIdentifierRequest, ReadDataByIdentifierRequestTx, ReadDataByIdentifierResponse, +}; mod read_dtc_information; pub use read_dtc_information::{ReadDTCInfoRequest, ReadDTCInfoResponse, ReadDTCInfoSubFunction}; mod request_download; -pub use request_download::{RequestDownloadRequest, RequestDownloadResponse}; +pub use request_download::{ + RequestDownloadRequest, RequestDownloadResponse, RequestDownloadResponseTx, +}; mod request_file_transfer; pub use request_file_transfer::{ @@ -36,13 +40,18 @@ mod routine_control; pub use routine_control::{RoutineControlRequest, RoutineControlResponse}; mod security_access; -pub use security_access::{SecurityAccessRequest, SecurityAccessResponse}; +pub use security_access::{ + SecurityAccessRequest, SecurityAccessRequestTx, SecurityAccessResponse, + SecurityAccessResponseTx, +}; mod tester_present; pub use tester_present::{TesterPresentRequest, TesterPresentResponse}; mod transfer_data; -pub use transfer_data::{TransferDataRequest, TransferDataResponse}; +pub use transfer_data::{ + TransferDataRequest, TransferDataRequestTx, TransferDataResponse, TransferDataResponseTx, +}; mod write_data_by_identifier; pub use write_data_by_identifier::{WriteDataByIdentifierRequest, WriteDataByIdentifierResponse}; diff --git a/src/services/read_data_by_identifier.rs b/src/services/read_data_by_identifier.rs index bd3fc99..473895a 100644 --- a/src/services/read_data_by_identifier.rs +++ b/src/services/read_data_by_identifier.rs @@ -1,6 +1,7 @@ //! `ReadDataByIdentifier` (0x22) service implementation use crate::{ - Error, Identifier, IterableWireFormat, NegativeResponseCode, SingleValueWireFormat, WireFormat, + Encode, Error, Identifier, IterableWireFormat, NegativeResponseCode, + SingleValueWireFormat, WireFormat, }; const READ_DID_NEGATIVE_RESPONSE_CODES: [NegativeResponseCode; 5] = [ @@ -46,7 +47,7 @@ impl WireFormat for ReadDataByIdentifierRequest(&self, writer: &mut W) -> Result { let mut count = 0; for did in &self.dids { - did.encode(writer)?; + WireFormat::encode(did, writer)?; count += 2; } Ok(count) @@ -123,6 +124,38 @@ impl SingleValueWireFormat } } +// --------------------------------------------------------------------------- +// no_std TX type (borrow from caller) +// --------------------------------------------------------------------------- + +/// Zero-alloc TX request to read data by identifier. Borrows DID list from caller. +#[derive(Clone, Copy, Debug, Eq, PartialEq)] +pub struct ReadDataByIdentifierRequestTx<'d, DataIdentifier> { + /// The list of Data Identifiers to read. + pub dids: &'d [DataIdentifier], +} + +impl<'d, DataIdentifier: Identifier> ReadDataByIdentifierRequestTx<'d, DataIdentifier> { + /// Create a new request from a slice of data identifiers. + #[must_use] + pub const fn new(dids: &'d [DataIdentifier]) -> Self { + Self { dids } + } +} + +impl Encode for ReadDataByIdentifierRequestTx<'_, DataIdentifier> { + fn encoded_size(&self) -> usize { + self.dids.len() * 2 + } + + fn encode(&self, writer: &mut impl embedded_io::Write) -> Result { + for did in self.dids { + Encode::encode(did, writer)?; + } + Ok(self.encoded_size()) + } +} + impl std::fmt::Debug for ReadDataByIdentifierResponse { fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result { write!(f, "ReadDataByIdentifierResponse\n{:?}", self.data) @@ -181,7 +214,7 @@ mod test { ids.iter() .flat_map(|id: &ProtocolIdentifier| { let mut buffer = Vec::new(); - id.encode(&mut buffer).unwrap(); + WireFormat::encode(id, &mut buffer).unwrap(); buffer }) .collect() diff --git a/src/services/request_download.rs b/src/services/request_download.rs index 55a98f3..760fd89 100644 --- a/src/services/request_download.rs +++ b/src/services/request_download.rs @@ -246,6 +246,66 @@ impl SingleValueWireFormat for RequestDownloadResponse { } } +// --------------------------------------------------------------------------- +// no_std TX type for RequestDownloadResponse (borrow from caller) +// --------------------------------------------------------------------------- + +/// Zero-alloc TX response for request download. Borrows from the caller. +#[derive(Clone, Copy, Debug, PartialEq)] +pub struct RequestDownloadResponseTx<'d> { + length_format_identifier: LengthFormatIdentifier, + /// Maximum number of bytes per [`TransferDataRequest`](crate::TransferDataRequest). + pub max_number_of_block_length: &'d [u8], +} + +impl<'d> RequestDownloadResponseTx<'d> { + /// Create a new request download response from a raw format byte and block length. + #[must_use] + pub fn new(length_format_byte: u8, max_number_of_block_length: &'d [u8]) -> Self { + Self { + length_format_identifier: LengthFormatIdentifier::from(length_format_byte), + max_number_of_block_length, + } + } +} + +impl Encode for RequestDownloadResponseTx<'_> { + fn encoded_size(&self) -> usize { + 1 + self.max_number_of_block_length.len() + } + + fn encode(&self, writer: &mut impl embedded_io::Write) -> Result { + writer + .write_all(&[self.length_format_identifier.into()]) + .map_err(Error::io)?; + writer + .write_all(self.max_number_of_block_length) + .map_err(Error::io)?; + Ok(self.encoded_size()) + } +} + +impl<'a> Decode<'a> for RequestDownloadResponseTx<'a> { + fn decode(buf: &'a [u8]) -> Result<(Self, &'a [u8]), Error> { + if buf.is_empty() { + return Err(Error::InsufficientData(1)); + } + let length_format_identifier = LengthFormatIdentifier::from(buf[0]); + let len = length_format_identifier.max_number_of_block_length as usize; + let total = 1 + len; + if buf.len() < total { + return Err(Error::InsufficientData(total)); + } + Ok(( + Self { + length_format_identifier, + max_number_of_block_length: &buf[1..total], + }, + &buf[total..], + )) + } +} + #[cfg(test)] mod tests { use super::*; diff --git a/src/services/security_access.rs b/src/services/security_access.rs index ee84e64..3e205f8 100644 --- a/src/services/security_access.rs +++ b/src/services/security_access.rs @@ -1,6 +1,6 @@ //! `SecurityAccess` (0x27) service implementation use crate::{ - Error, NegativeResponseCode, SecurityAccessType, SingleValueWireFormat, + Decode, Encode, Error, NegativeResponseCode, SecurityAccessType, SingleValueWireFormat, SuppressablePositiveResponse, WireFormat, }; use byteorder_embedded_io::io::{ReadBytesExt, WriteBytesExt}; @@ -166,6 +166,134 @@ impl SingleValueWireFormat for SecurityAccessResponse { } } +// --------------------------------------------------------------------------- +// no_std TX types (borrow from caller) +// --------------------------------------------------------------------------- + +/// Zero-alloc TX request for security access. Borrows from the caller. +#[derive(Clone, Copy, Debug, Eq, PartialEq)] +pub struct SecurityAccessRequestTx<'d> { + access_type: SuppressablePositiveResponse, + request_data: &'d [u8], +} + +impl<'d> SecurityAccessRequestTx<'d> { + /// Create a new security access request. + #[must_use] + pub const fn new( + suppress_positive_response: bool, + access_type: SecurityAccessType, + request_data: &'d [u8], + ) -> Self { + Self { + access_type: SuppressablePositiveResponse::new(suppress_positive_response, access_type), + request_data, + } + } + + /// Getter for whether a positive response should be suppressed + #[must_use] + pub fn suppress_positive_response(&self) -> bool { + self.access_type.suppress_positive_response() + } + + /// Getter for the requested [`SecurityAccessType`] + #[must_use] + pub fn access_type(&self) -> SecurityAccessType { + self.access_type.value() + } + + /// Getter for the request data + #[must_use] + pub const fn request_data(&self) -> &[u8] { + self.request_data + } +} + +impl Encode for SecurityAccessRequestTx<'_> { + fn encoded_size(&self) -> usize { + 1 + self.request_data.len() + } + + fn encode(&self, writer: &mut impl embedded_io::Write) -> Result { + writer + .write_all(&[u8::from(self.access_type)]) + .map_err(Error::io)?; + writer.write_all(self.request_data).map_err(Error::io)?; + Ok(self.encoded_size()) + } + + fn is_positive_response_suppressed(&self) -> bool { + self.suppress_positive_response() + } +} + +impl<'a> Decode<'a> for SecurityAccessRequestTx<'a> { + fn decode(buf: &'a [u8]) -> Result<(Self, &'a [u8]), Error> { + if buf.is_empty() { + return Err(Error::InsufficientData(1)); + } + let access_type = SuppressablePositiveResponse::try_from(buf[0])?; + Ok(( + Self { + access_type, + request_data: &buf[1..], + }, + &[], + )) + } +} + +/// Zero-alloc TX response for security access. Borrows from the caller. +#[derive(Clone, Copy, Debug, Eq, PartialEq)] +pub struct SecurityAccessResponseTx<'d> { + /// The security access type echoed from the request. + pub access_type: SecurityAccessType, + /// The security seed bytes (empty for a `SendKey` positive response). + pub security_seed: &'d [u8], +} + +impl<'d> SecurityAccessResponseTx<'d> { + /// Create a new security access response. + #[must_use] + pub const fn new(access_type: SecurityAccessType, security_seed: &'d [u8]) -> Self { + Self { + access_type, + security_seed, + } + } +} + +impl Encode for SecurityAccessResponseTx<'_> { + fn encoded_size(&self) -> usize { + 1 + self.security_seed.len() + } + + fn encode(&self, writer: &mut impl embedded_io::Write) -> Result { + writer + .write_all(&[u8::from(self.access_type)]) + .map_err(Error::io)?; + writer.write_all(self.security_seed).map_err(Error::io)?; + Ok(self.encoded_size()) + } +} + +impl<'a> Decode<'a> for SecurityAccessResponseTx<'a> { + fn decode(buf: &'a [u8]) -> Result<(Self, &'a [u8]), Error> { + if buf.is_empty() { + return Err(Error::InsufficientData(1)); + } + let access_type = SecurityAccessType::try_from(buf[0])?; + Ok(( + Self { + access_type, + security_seed: &buf[1..], + }, + &[], + )) + } +} + #[cfg(test)] mod request { use super::*; diff --git a/src/services/transfer_data.rs b/src/services/transfer_data.rs index 3d9e21a..b9748c8 100644 --- a/src/services/transfer_data.rs +++ b/src/services/transfer_data.rs @@ -1,7 +1,7 @@ //! `TransferData` (0x36) service implementation use byteorder_embedded_io::io::{ReadBytesExt, WriteBytesExt}; -use crate::{Error, SingleValueWireFormat, WireFormat}; +use crate::{Decode, Encode, Error, SingleValueWireFormat, WireFormat}; /// A request to the server to transfer data (either upload or download) /// @@ -125,6 +125,108 @@ impl SingleValueWireFormat for TransferDataResponse { } } +// --------------------------------------------------------------------------- +// no_std TX types (borrow from caller) +// --------------------------------------------------------------------------- + +/// Zero-alloc TX request to transfer data. Borrows from the caller. +#[derive(Clone, Copy, Debug, PartialEq)] +pub struct TransferDataRequestTx<'d> { + /// Block sequence counter (wraps 0xFF → 0x00). + pub block_sequence_counter: u8, + /// The data to be transferred. + pub data: &'d [u8], +} + +impl<'d> TransferDataRequestTx<'d> { + /// Create a new transfer data request. + #[must_use] + pub const fn new(block_sequence_counter: u8, data: &'d [u8]) -> Self { + Self { + block_sequence_counter, + data, + } + } +} + +impl Encode for TransferDataRequestTx<'_> { + fn encoded_size(&self) -> usize { + 1 + self.data.len() + } + + fn encode(&self, writer: &mut impl embedded_io::Write) -> Result { + writer + .write_all(&[self.block_sequence_counter]) + .map_err(Error::io)?; + writer.write_all(self.data).map_err(Error::io)?; + Ok(self.encoded_size()) + } +} + +impl<'a> Decode<'a> for TransferDataRequestTx<'a> { + fn decode(buf: &'a [u8]) -> Result<(Self, &'a [u8]), Error> { + if buf.is_empty() { + return Err(Error::InsufficientData(1)); + } + Ok(( + Self { + block_sequence_counter: buf[0], + data: &buf[1..], + }, + &[], + )) + } +} + +/// Zero-alloc TX response for transfer data. Borrows from the caller. +#[derive(Clone, Copy, Debug, PartialEq)] +pub struct TransferDataResponseTx<'d> { + /// Echo of the block sequence counter. + pub block_sequence_counter: u8, + /// Response data (vendor-specific). + pub data: &'d [u8], +} + +impl<'d> TransferDataResponseTx<'d> { + /// Create a new transfer data response. + #[must_use] + pub const fn new(block_sequence_counter: u8, data: &'d [u8]) -> Self { + Self { + block_sequence_counter, + data, + } + } +} + +impl Encode for TransferDataResponseTx<'_> { + fn encoded_size(&self) -> usize { + 1 + self.data.len() + } + + fn encode(&self, writer: &mut impl embedded_io::Write) -> Result { + writer + .write_all(&[self.block_sequence_counter]) + .map_err(Error::io)?; + writer.write_all(self.data).map_err(Error::io)?; + Ok(self.encoded_size()) + } +} + +impl<'a> Decode<'a> for TransferDataResponseTx<'a> { + fn decode(buf: &'a [u8]) -> Result<(Self, &'a [u8]), Error> { + if buf.is_empty() { + return Err(Error::InsufficientData(1)); + } + Ok(( + Self { + block_sequence_counter: buf[0], + data: &buf[1..], + }, + &[], + )) + } +} + #[cfg(test)] mod request { use super::*; From 2aa7f7c44bb23b2218d53877c96e666aefc154d0 Mon Sep 17 00:00:00 2001 From: Zach Heylmun Date: Thu, 2 Apr 2026 22:01:40 -0400 Subject: [PATCH 06/58] add zero-copy RX types and lazy iterators for DTC responses Add lazy iterator types for zero-alloc DTC record parsing: - DtcAndStatusIter: iterates (DTCRecord, DTCStatusMask) pairs - DtcFaultDetectionIter: iterates DTCFaultDetectionCounterRecord - DtcSeverityAndStatusIter: iterates (DTCSeverityMask, DTCRecord, DTCStatusMask) Add ReadDTCInfoResponseRx<'a> enum with zero-copy Decode impl covering subfunctions 0x01-0x02, 0x07-0x09, 0x0A-0x0E, 0x14-0x15, 0x42. Stores raw record bytes and provides lazy iterators. --- src/services/mod.rs | 5 +- src/services/read_dtc_information.rs | 313 ++++++++++++++++++++++++++- 2 files changed, 308 insertions(+), 10 deletions(-) diff --git a/src/services/mod.rs b/src/services/mod.rs index addf792..c2e4f7a 100644 --- a/src/services/mod.rs +++ b/src/services/mod.rs @@ -24,7 +24,10 @@ pub use read_data_by_identifier::{ }; mod read_dtc_information; -pub use read_dtc_information::{ReadDTCInfoRequest, ReadDTCInfoResponse, ReadDTCInfoSubFunction}; +pub use read_dtc_information::{ + DtcAndStatusIter, DtcFaultDetectionIter, DtcSeverityAndStatusIter, ReadDTCInfoRequest, + ReadDTCInfoResponse, ReadDTCInfoResponseRx, ReadDTCInfoSubFunction, +}; mod request_download; pub use request_download::{ diff --git a/src/services/read_dtc_information.rs b/src/services/read_dtc_information.rs index 7090c06..4e1ad8a 100644 --- a/src/services/read_dtc_information.rs +++ b/src/services/read_dtc_information.rs @@ -4,8 +4,8 @@ use byteorder_embedded_io::io::{ReadBytesExt, WriteBytesExt}; use crate::{ DTCExtDataRecordList, DTCExtDataRecordNumber, DTCFormatIdentifier, DTCRecord, DTCSeverityMask, DTCSeverityRecord, DTCSnapshotRecord, DTCSnapshotRecordList, DTCSnapshotRecordNumber, - DTCStatusMask, DTCStoredDataRecordNumber, Error, FunctionalGroupIdentifier, IterableWireFormat, - SingleValueWireFormat, WireFormat, + DTCStatusMask, DTCStoredDataRecordNumber, Decode, Error, FunctionalGroupIdentifier, + IterableWireFormat, SingleValueWireFormat, WireFormat, }; /// Used for non-emissions related servers @@ -140,7 +140,7 @@ impl SingleValueWireFormat { fn decode(reader: &mut T) -> Result { let memory_selection = reader.read_u8()?; - let dtc_record = DTCRecord::decode(reader)?; + let dtc_record = ::decode(reader)?; let dtc_status_mask = DTCStatusMask::decode(reader)?; let mut dtc_snapshot_record = Vec::new(); @@ -512,7 +512,7 @@ impl SingleValueWireFormat for ReadDTCInfoSubFunction { } 0x03 => Self::ReportDTCSnapshotIdentification, 0x04 => Self::ReportDTCSnapshotRecord_ByDTCNumber( - DTCRecord::decode(reader)?, + ::decode(reader)?, DTCSnapshotRecordNumber::decode(reader)?, ), 0x05 => { @@ -520,7 +520,7 @@ impl SingleValueWireFormat for ReadDTCInfoSubFunction { } // 0xFF for all records, 0xFE for all OBD records 0x06 => Self::ReportDTCExtDataRecord_ByDTCNumber( - DTCRecord::decode(reader)?, + ::decode(reader)?, DTCExtDataRecordNumber::decode(reader)?, ), 0x07 => Self::ReportNumberOfDTC_BySeverityMaskRecord( @@ -531,7 +531,7 @@ impl SingleValueWireFormat for ReadDTCInfoSubFunction { DTCSeverityMask::from(reader.read_u8()?), DTCStatusMask::from(reader.read_u8()?), ), - 0x09 => Self::ReportSeverityInfoOfDTC(DTCRecord::decode(reader)?), + 0x09 => Self::ReportSeverityInfoOfDTC(::decode(reader)?), 0x0A => Self::ReportSupportedDTC, 0x0B => Self::ReportFirstTestFailedDTC, 0x0C => Self::ReportFirstConfirmedDTC, @@ -547,12 +547,12 @@ impl SingleValueWireFormat for ReadDTCInfoSubFunction { } // 0xFF for all records 0x18 => Self::ReportUserDefMemoryDTCSnapshotRecord_ByDTCNumber( - DTCRecord::decode(reader)?, + ::decode(reader)?, DTCSnapshotRecordNumber::decode(reader)?, reader.read_u8()?, ), 0x19 => Self::ReportUserDefMemoryDTCExtDataRecord_ByDTCNumber( - DTCRecord::decode(reader)?, + ::decode(reader)?, DTCExtDataRecordNumber::decode(reader)?, reader.read_u8()?, ), @@ -1051,7 +1051,7 @@ impl SingleValueWireFormat for ReadDTCInfoRespo let mut record_data = Vec::new(); while let Ok(dtc_severity_mask) = reader.read_u8() { let dtc_severity_mask = DTCSeverityMask::from(dtc_severity_mask); - let dtc_record = DTCRecord::decode(reader)?; + let dtc_record = ::decode(reader)?; let dtc_status = DTCStatusMask::decode(reader)?; record_data.push((dtc_severity_mask, dtc_record, dtc_status)); } @@ -1121,6 +1121,301 @@ impl SingleValueWireFormat for ReadDTCInfoRespo } } +// --------------------------------------------------------------------------- +// no_std RX types with lazy iterators +// --------------------------------------------------------------------------- + +/// Lazy iterator over `(DTCRecord, DTCStatusMask)` pairs from raw bytes. +/// +/// Each pair is 4 bytes: 3 for the DTC record + 1 for the status mask. +#[derive(Clone, Debug)] +pub struct DtcAndStatusIter<'a> { + remaining: &'a [u8], +} + +impl<'a> DtcAndStatusIter<'a> { + /// Create an iterator over `(DTCRecord, DTCStatusMask)` pairs. + #[must_use] + pub const fn new(data: &'a [u8]) -> Self { + Self { remaining: data } + } + + /// Number of complete records available. + #[must_use] + pub const fn len(&self) -> usize { + self.remaining.len() / 4 + } + + /// Whether there are no records. + #[must_use] + pub const fn is_empty(&self) -> bool { + self.remaining.is_empty() + } +} + +impl Iterator for DtcAndStatusIter<'_> { + type Item = Result<(DTCRecord, DTCStatusMask), Error>; + + fn next(&mut self) -> Option { + if self.remaining.is_empty() { + return None; + } + if self.remaining.len() < 4 { + return Some(Err(Error::IncorrectMessageLengthOrInvalidFormat)); + } + let record = DTCRecord::new(self.remaining[0], self.remaining[1], self.remaining[2]); + let status = DTCStatusMask::from(self.remaining[3]); + self.remaining = &self.remaining[4..]; + Some(Ok((record, status))) + } +} + +/// Lazy iterator over `DTCFaultDetectionCounterRecord` from raw bytes. +/// +/// Each record is 4 bytes: 3 for the DTC record + 1 for the fault detection counter. +#[derive(Clone, Debug)] +pub struct DtcFaultDetectionIter<'a> { + remaining: &'a [u8], +} + +impl<'a> DtcFaultDetectionIter<'a> { + /// Create an iterator over `DTCFaultDetectionCounterRecord` values. + #[must_use] + pub const fn new(data: &'a [u8]) -> Self { + Self { remaining: data } + } +} + +impl Iterator for DtcFaultDetectionIter<'_> { + type Item = Result; + + fn next(&mut self) -> Option { + if self.remaining.is_empty() { + return None; + } + if self.remaining.len() < 4 { + return Some(Err(Error::IncorrectMessageLengthOrInvalidFormat)); + } + let dtc_record = + DTCRecord::new(self.remaining[0], self.remaining[1], self.remaining[2]); + let dtc_fault_detection_counter = self.remaining[3]; + self.remaining = &self.remaining[4..]; + Some(Ok(DTCFaultDetectionCounterRecord { + dtc_record, + dtc_fault_detection_counter, + })) + } +} + +/// Lazy iterator over `(DTCSeverityMask, DTCRecord, DTCStatusMask)` triples from raw bytes. +/// +/// Each triple is 5 bytes: 1 severity + 3 DTC record + 1 status mask. +#[derive(Clone, Debug)] +pub struct DtcSeverityAndStatusIter<'a> { + remaining: &'a [u8], +} + +impl<'a> DtcSeverityAndStatusIter<'a> { + /// Create an iterator over severity/DTC/status triples. + #[must_use] + pub const fn new(data: &'a [u8]) -> Self { + Self { remaining: data } + } +} + +impl Iterator for DtcSeverityAndStatusIter<'_> { + type Item = Result<(DTCSeverityMask, DTCRecord, DTCStatusMask), Error>; + + fn next(&mut self) -> Option { + if self.remaining.is_empty() { + return None; + } + if self.remaining.len() < 5 { + return Some(Err(Error::IncorrectMessageLengthOrInvalidFormat)); + } + let severity = DTCSeverityMask::from(self.remaining[0]); + let record = DTCRecord::new(self.remaining[1], self.remaining[2], self.remaining[3]); + let status = DTCStatusMask::from(self.remaining[4]); + self.remaining = &self.remaining[5..]; + Some(Ok((severity, record, status))) + } +} + +/// Zero-copy RX response for `ReadDTCInformation` (0x19). +/// +/// Stores raw bytes for record collections and provides lazy iterators +/// that parse on demand without allocation. +#[derive(Clone, Debug)] +#[non_exhaustive] +pub enum ReadDTCInfoResponseRx<'a> { + /// Sub-functions 0x01, 0x07: count of DTCs matching a mask. + NumberOfDTCs { + /// Sub-function byte echo. + sub_function_id: u8, + /// DTC status availability mask. + status_availability_mask: DTCStatusAvailabilityMask, + /// Number of matching DTCs. + count: u16, + }, + /// Sub-functions 0x02, 0x0A-0x0E, 0x15: list of `(DTCRecord, DTCStatusMask)` pairs. + DTCList { + /// Sub-function byte echo. + sub_function_id: u8, + /// DTC status availability mask. + status_availability_mask: DTCStatusAvailabilityMask, + /// Raw record bytes — use [`DtcAndStatusIter`] to iterate. + raw_records: &'a [u8], + }, + /// Sub-function 0x14: list of DTC fault detection counter records. + DTCFaultDetectionCounterList { + /// Raw record bytes — use [`DtcFaultDetectionIter`] to iterate. + raw_records: &'a [u8], + }, + /// Sub-functions 0x08, 0x09: list of DTC severity records. + DTCSeverityList { + /// Sub-function byte echo. + sub_function_id: u8, + /// DTC status availability mask. + status_availability_mask: DTCStatusAvailabilityMask, + /// Raw record bytes (6 bytes per record) — use [`DTCSeverityRecord`] iteration. + raw_records: &'a [u8], + }, + /// Sub-function 0x42: WWH-OBD DTC by mask with severity info. + WWHOBDDTCByMaskRecord { + /// Functional group identifier echo. + functional_group_identifier: FunctionalGroupIdentifier, + /// DTC status availability mask. + status_availability_mask: DTCStatusAvailabilityMask, + /// Severity availability mask. + severity_availability_mask: DTCSeverityMask, + /// DTC format identifier. + format_identifier: DTCFormatIdentifier, + /// Raw record bytes (5 bytes per record) — use [`DtcSeverityAndStatusIter`]. + raw_records: &'a [u8], + }, +} + +impl<'a> ReadDTCInfoResponseRx<'a> { + /// Iterate `(DTCRecord, DTCStatusMask)` pairs for `DTCList` variants. + /// + /// Returns `None` if this is not a `DTCList` variant. + #[must_use] + pub fn dtc_and_status_iter(&self) -> Option> { + match self { + Self::DTCList { raw_records, .. } => Some(DtcAndStatusIter::new(raw_records)), + _ => None, + } + } + + /// Iterate fault detection counter records for the `DTCFaultDetectionCounterList` variant. + /// + /// Returns `None` if this is not that variant. + #[must_use] + pub fn fault_detection_iter(&self) -> Option> { + match self { + Self::DTCFaultDetectionCounterList { raw_records } => { + Some(DtcFaultDetectionIter::new(raw_records)) + } + _ => None, + } + } + + /// Iterate severity/DTC/status triples for WWH-OBD variants. + /// + /// Returns `None` if this is not a severity variant. + #[must_use] + pub fn severity_and_status_iter(&self) -> Option> { + match self { + Self::WWHOBDDTCByMaskRecord { raw_records, .. } => { + Some(DtcSeverityAndStatusIter::new(raw_records)) + } + _ => None, + } + } +} + +impl<'a> Decode<'a> for ReadDTCInfoResponseRx<'a> { + fn decode(buf: &'a [u8]) -> Result<(Self, &'a [u8]), Error> { + if buf.is_empty() { + return Err(Error::InsufficientData(1)); + } + let subfunction_id = buf[0]; + let buf = &buf[1..]; + + match subfunction_id { + 0x01 | 0x07 => { + if buf.len() < 3 { + return Err(Error::InsufficientData(4)); + } + let status_availability_mask = DTCStatusAvailabilityMask::from(buf[0]); + let count = u16::from_be_bytes([buf[1], buf[2]]); + Ok(( + Self::NumberOfDTCs { + sub_function_id: subfunction_id, + status_availability_mask, + count, + }, + &buf[3..], + )) + } + 0x02 | 0x0A | 0x0B | 0x0C | 0x0D | 0x0E | 0x15 => { + if buf.is_empty() { + return Err(Error::InsufficientData(2)); + } + let status_availability_mask = DTCStatusAvailabilityMask::from(buf[0]); + Ok(( + Self::DTCList { + sub_function_id: subfunction_id, + status_availability_mask, + raw_records: &buf[1..], + }, + &[], + )) + } + 0x14 => Ok(( + Self::DTCFaultDetectionCounterList { + raw_records: buf, + }, + &[], + )), + 0x08 | 0x09 => { + if buf.is_empty() { + return Err(Error::InsufficientData(2)); + } + let status_availability_mask = DTCStatusAvailabilityMask::from(buf[0]); + Ok(( + Self::DTCSeverityList { + sub_function_id: subfunction_id, + status_availability_mask, + raw_records: &buf[1..], + }, + &[], + )) + } + 0x42 => { + if buf.len() < 4 { + return Err(Error::InsufficientData(5)); + } + let functional_group_identifier = FunctionalGroupIdentifier::from(buf[0]); + let status_availability_mask = DTCStatusAvailabilityMask::from(buf[1]); + let severity_availability_mask = DTCSeverityMask::from(buf[2]); + let format_identifier = DTCFormatIdentifier::from(buf[3]); + Ok(( + Self::WWHOBDDTCByMaskRecord { + functional_group_identifier, + status_availability_mask, + severity_availability_mask, + format_identifier, + raw_records: &buf[4..], + }, + &[], + )) + } + _ => Err(Error::InvalidDtcSubfunctionType(subfunction_id)), + } + } +} + #[cfg(test)] mod response { From 311d04431be4b1b574b89bd66830967aee196eec Mon Sep 17 00:00:00 2001 From: Zach Heylmun Date: Fri, 3 Apr 2026 08:12:12 -0400 Subject: [PATCH 07/58] add RequestRx/ResponseRx enums and DiagnosticDefinitionTx trait MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit - Add DiagnosticDefinitionTx trait with Encode-based bounds for no_std TX - Implement DiagnosticDefinitionTx for UdsSpec - Add RequestRx<'a> enum: zero-copy request decoding from byte slices - Add ResponseRx<'a> enum: zero-copy response decoding from byte slices - Add UdsResponseRx<'a>: raw zero-copy response (replaces UdsResponse) - RX enums don't require DiagnosticDefinition — variable payloads stored as raw &'a [u8] for on-demand parsing --- src/lib.rs | 15 ++-- src/request.rs | 165 +++++++++++++++++++++++++++++++++++++++---- src/response.rs | 183 +++++++++++++++++++++++++++++++++++++++++++----- src/traits.rs | 16 +++++ 4 files changed, 341 insertions(+), 38 deletions(-) diff --git a/src/lib.rs b/src/lib.rs index 86a422d..8d22e6f 100644 --- a/src/lib.rs +++ b/src/lib.rs @@ -6,8 +6,8 @@ pub use error::Error; mod traits; pub use traits::{ - Decode, DecodeIter, DiagnosticDefinition, Encode, Identifier, IterableWireFormat, - RoutineIdentifier, SingleValueWireFormat, WireFormat, + Decode, DecodeIter, DiagnosticDefinition, DiagnosticDefinitionTx, Encode, Identifier, + IterableWireFormat, RoutineIdentifier, SingleValueWireFormat, WireFormat, }; mod common; @@ -20,10 +20,10 @@ pub use protocol_definitions::{ }; mod request; -pub use request::Request; +pub use request::{Request, RequestRx}; mod response; -pub use response::{Response, UdsResponse}; +pub use response::{Response, ResponseRx, UdsResponse, UdsResponseRx}; mod service; pub use service::UdsServiceType; @@ -52,6 +52,13 @@ impl DiagnosticDefinition for UdsSpec { type DiagnosticPayload = ProtocolPayload; } +impl DiagnosticDefinitionTx for UdsSpec { + type RID = UDSRoutineIdentifier; + type DID = ProtocolIdentifier; + type RoutinePayload = ProtocolRoutinePayloadTx<'static>; + type DiagnosticPayload = ProtocolPayloadTx<'static>; +} + /// Type alias for a UDS Request type that only implements the messages explicitly defined by the UDS specification. pub type ProtocolRequest = Request; diff --git a/src/request.rs b/src/request.rs index 6daede3..c6f396a 100644 --- a/src/request.rs +++ b/src/request.rs @@ -1,12 +1,13 @@ //! Module for making and handling UDS Requests use crate::{ - DiagnosticDefinition, Error, NegativeResponseCode, ReadDTCInfoRequest, ResetType, + Decode, DiagnosticDefinition, Error, NegativeResponseCode, ReadDTCInfoRequest, ResetType, SecurityAccessType, SingleValueWireFormat, WireFormat, services::{ ClearDiagnosticInfoRequest, CommunicationControlRequest, ControlDTCSettingsRequest, DiagnosticSessionControlRequest, EcuResetRequest, ReadDataByIdentifierRequest, - RequestDownloadRequest, RoutineControlRequest, SecurityAccessRequest, TesterPresentRequest, - TransferDataRequest, WriteDataByIdentifierRequest, + RequestDownloadRequest, RoutineControlRequest, SecurityAccessRequest, + SecurityAccessRequestTx, TesterPresentRequest, TransferDataRequest, TransferDataRequestTx, + WriteDataByIdentifierRequest, }, }; use byteorder_embedded_io::io::{ReadBytesExt, WriteBytesExt}; @@ -355,37 +356,37 @@ impl SingleValueWireFormat for Request { let service = UdsServiceType::service_from_request_byte(reader.read_u8()?); Ok(match service { UdsServiceType::CommunicationControl => { - Self::CommunicationControl(CommunicationControlRequest::decode(reader)?) + Self::CommunicationControl(::decode(reader)?) } UdsServiceType::ControlDTCSettings => { - Self::ControlDTCSettings(ControlDTCSettingsRequest::decode(reader)?) + Self::ControlDTCSettings(::decode(reader)?) } UdsServiceType::DiagnosticSessionControl => { - Self::DiagnosticSessionControl(DiagnosticSessionControlRequest::decode(reader)?) + Self::DiagnosticSessionControl(::decode(reader)?) } - UdsServiceType::EcuReset => Self::EcuReset(EcuResetRequest::decode(reader)?), + UdsServiceType::EcuReset => Self::EcuReset(::decode(reader)?), UdsServiceType::ReadDataByIdentifier => { - Self::ReadDataByIdentifier(ReadDataByIdentifierRequest::decode(reader)?) + Self::ReadDataByIdentifier( as SingleValueWireFormat>::decode(reader)?) } - UdsServiceType::ReadDTCInfo => Self::ReadDTCInfo(ReadDTCInfoRequest::decode(reader)?), + UdsServiceType::ReadDTCInfo => Self::ReadDTCInfo(::decode(reader)?), UdsServiceType::RequestDownload => { - Self::RequestDownload(RequestDownloadRequest::decode(reader)?) + Self::RequestDownload(::decode(reader)?) } UdsServiceType::RequestTransferExit => Self::RequestTransferExit, UdsServiceType::RoutineControl => { - Self::RoutineControl(RoutineControlRequest::decode(reader)?) + Self::RoutineControl( as SingleValueWireFormat>::decode(reader)?) } UdsServiceType::SecurityAccess => { - Self::SecurityAccess(SecurityAccessRequest::decode(reader)?) + Self::SecurityAccess(::decode(reader)?) } UdsServiceType::TesterPresent => { - Self::TesterPresent(TesterPresentRequest::decode(reader)?) + Self::TesterPresent(::decode(reader)?) } UdsServiceType::TransferData => { - Self::TransferData(TransferDataRequest::decode(reader)?) + Self::TransferData(::decode(reader)?) } UdsServiceType::WriteDataByIdentifier => { - Self::WriteDataByIdentifier(WriteDataByIdentifierRequest::decode(reader)?) + Self::WriteDataByIdentifier( as SingleValueWireFormat>::decode(reader)?) } UdsServiceType::Authentication => { return Err(Error::ServiceNotImplemented(UdsServiceType::Authentication)); @@ -465,6 +466,140 @@ impl SingleValueWireFormat for Request { } } +// --------------------------------------------------------------------------- +// no_std RX request enum (zero-copy, no DiagnosticDefinition needed) +// --------------------------------------------------------------------------- + +/// Zero-copy RX request. Borrows from the wire buffer. +/// +/// Unlike [`Request`], this enum does not require a [`DiagnosticDefinition`] +/// generic parameter — variable-length payloads are stored as raw `&'a [u8]` +/// slices. +#[derive(Clone, Debug)] +#[non_exhaustive] +pub enum RequestRx<'a> { + /// Clear diagnostic information request. + ClearDiagnosticInfo(ClearDiagnosticInfoRequest), + /// Communication control request. + CommunicationControl(CommunicationControlRequest), + /// Control DTC settings request. + ControlDTCSettings(ControlDTCSettingsRequest), + /// Diagnostic session control request. + DiagnosticSessionControl(DiagnosticSessionControlRequest), + /// ECU reset request. + EcuReset(EcuResetRequest), + /// Read data by identifier request. Raw DID bytes. + ReadDataByIdentifier(&'a [u8]), + /// Read DTC information request. Raw sub-function + parameter bytes. + ReadDTCInfo(&'a [u8]), + /// Request download. + RequestDownload(RequestDownloadRequest), + /// Request transfer exit. + RequestTransferExit, + /// Routine control request. Sub-function byte + raw payload. + RoutineControl { + /// Routine control sub-function byte. + sub_function: u8, + /// Raw routine ID + optional payload bytes. + raw_payload: &'a [u8], + }, + /// Security access request. + SecurityAccess(SecurityAccessRequestTx<'a>), + /// Tester present request. + TesterPresent(TesterPresentRequest), + /// Transfer data request. + TransferData(TransferDataRequestTx<'a>), + /// Write data by identifier request. Raw DID + payload bytes. + WriteDataByIdentifier(&'a [u8]), +} + +impl<'a> Decode<'a> for RequestRx<'a> { + fn decode(buf: &'a [u8]) -> Result<(Self, &'a [u8]), Error> { + if buf.is_empty() { + return Err(Error::InsufficientData(1)); + } + let service = UdsServiceType::service_from_request_byte(buf[0]); + let payload = &buf[1..]; + + let request = match service { + UdsServiceType::ClearDiagnosticInfo => { + let (req, _) = ::decode(payload)?; + Self::ClearDiagnosticInfo(req) + } + UdsServiceType::CommunicationControl => { + let (req, _) = ::decode(payload)?; + Self::CommunicationControl(req) + } + UdsServiceType::ControlDTCSettings => { + let (req, _) = ::decode(payload)?; + Self::ControlDTCSettings(req) + } + UdsServiceType::DiagnosticSessionControl => { + let (req, _) = ::decode(payload)?; + Self::DiagnosticSessionControl(req) + } + UdsServiceType::EcuReset => { + let (req, _) = ::decode(payload)?; + Self::EcuReset(req) + } + UdsServiceType::ReadDataByIdentifier => Self::ReadDataByIdentifier(payload), + UdsServiceType::ReadDTCInfo => Self::ReadDTCInfo(payload), + UdsServiceType::RequestDownload => { + let (req, _) = ::decode(payload)?; + Self::RequestDownload(req) + } + UdsServiceType::RequestTransferExit => Self::RequestTransferExit, + UdsServiceType::RoutineControl => { + if payload.is_empty() { + return Err(Error::InsufficientData(2)); + } + Self::RoutineControl { + sub_function: payload[0], + raw_payload: &payload[1..], + } + } + UdsServiceType::SecurityAccess => { + let (req, _) = ::decode(payload)?; + Self::SecurityAccess(req) + } + UdsServiceType::TesterPresent => { + let (req, _) = ::decode(payload)?; + Self::TesterPresent(req) + } + UdsServiceType::TransferData => { + let (req, _) = ::decode(payload)?; + Self::TransferData(req) + } + UdsServiceType::WriteDataByIdentifier => Self::WriteDataByIdentifier(payload), + _ => return Err(Error::ServiceNotImplemented(service)), + }; + Ok((request, &[])) + } +} + +impl RequestRx<'_> { + /// Returns the [`UdsServiceType`] corresponding to this request variant. + #[must_use] + pub fn service(&self) -> UdsServiceType { + match self { + Self::ClearDiagnosticInfo(_) => UdsServiceType::ClearDiagnosticInfo, + Self::CommunicationControl(_) => UdsServiceType::CommunicationControl, + Self::ControlDTCSettings(_) => UdsServiceType::ControlDTCSettings, + Self::DiagnosticSessionControl(_) => UdsServiceType::DiagnosticSessionControl, + Self::EcuReset(_) => UdsServiceType::EcuReset, + Self::ReadDataByIdentifier(_) => UdsServiceType::ReadDataByIdentifier, + Self::ReadDTCInfo(_) => UdsServiceType::ReadDTCInfo, + Self::RequestDownload(_) => UdsServiceType::RequestDownload, + Self::RequestTransferExit => UdsServiceType::RequestTransferExit, + Self::RoutineControl { .. } => UdsServiceType::RoutineControl, + Self::SecurityAccess(_) => UdsServiceType::SecurityAccess, + Self::TesterPresent(_) => UdsServiceType::TesterPresent, + Self::TransferData(_) => UdsServiceType::TransferData, + Self::WriteDataByIdentifier(_) => UdsServiceType::WriteDataByIdentifier, + } + } +} + #[cfg(test)] mod tests { use super::*; diff --git a/src/response.rs b/src/response.rs index bb4a8b3..17122d7 100644 --- a/src/response.rs +++ b/src/response.rs @@ -1,11 +1,12 @@ use crate::{ - CommunicationControlResponse, CommunicationControlType, ControlDTCSettingsResponse, + CommunicationControlResponse, CommunicationControlType, ControlDTCSettingsResponse, Decode, DiagnosticDefinition, DiagnosticSessionControlResponse, DiagnosticSessionType, DtcSettings, EcuResetResponse, Error, NegativeResponse, NegativeResponseCode, ReadDTCInfoResponse, - ReadDataByIdentifierResponse, RequestDownloadResponse, RequestFileTransferResponse, ResetType, - RoutineControlResponse, SecurityAccessResponse, SecurityAccessType, SingleValueWireFormat, - TesterPresentResponse, TransferDataResponse, UdsServiceType, WireFormat, - WriteDataByIdentifierResponse, + ReadDTCInfoResponseRx, ReadDataByIdentifierResponse, RequestDownloadResponse, + RequestDownloadResponseTx, RequestFileTransferResponse, ResetType, RoutineControlResponse, + SecurityAccessResponse, SecurityAccessResponseTx, SecurityAccessType, SingleValueWireFormat, + TesterPresentResponse, TransferDataResponse, TransferDataResponseTx, UdsServiceType, + WireFormat, WriteDataByIdentifierResponse, }; use byteorder_embedded_io::io::{ReadBytesExt, WriteBytesExt}; use std::io::{Read, Write}; @@ -234,40 +235,40 @@ impl SingleValueWireFormat for Response { let service = UdsServiceType::response_from_byte(reader.read_u8()?); Ok(match service { UdsServiceType::CommunicationControl => { - Self::CommunicationControl(CommunicationControlResponse::decode(reader)?) + Self::CommunicationControl(::decode(reader)?) } UdsServiceType::ControlDTCSettings => { - Self::ControlDTCSettings(ControlDTCSettingsResponse::decode(reader)?) + Self::ControlDTCSettings(::decode(reader)?) } UdsServiceType::DiagnosticSessionControl => { - Self::DiagnosticSessionControl(DiagnosticSessionControlResponse::decode(reader)?) + Self::DiagnosticSessionControl(::decode(reader)?) } - UdsServiceType::EcuReset => Self::EcuReset(EcuResetResponse::decode(reader)?), + UdsServiceType::EcuReset => Self::EcuReset(::decode(reader)?), UdsServiceType::ReadDataByIdentifier => { - Self::ReadDataByIdentifier(ReadDataByIdentifierResponse::decode(reader)?) + Self::ReadDataByIdentifier( as SingleValueWireFormat>::decode(reader)?) } - UdsServiceType::ReadDTCInfo => Self::ReadDTCInfo(ReadDTCInfoResponse::decode(reader)?), + UdsServiceType::ReadDTCInfo => Self::ReadDTCInfo( as SingleValueWireFormat>::decode(reader)?), UdsServiceType::RequestDownload => { - Self::RequestDownload(RequestDownloadResponse::decode(reader)?) + Self::RequestDownload(::decode(reader)?) } UdsServiceType::RequestFileTransfer => { - Self::RequestFileTransfer(RequestFileTransferResponse::decode(reader)?) + Self::RequestFileTransfer(::decode(reader)?) } UdsServiceType::RequestTransferExit => Self::RequestTransferExit, UdsServiceType::RoutineControl => { - Self::RoutineControl(RoutineControlResponse::decode(reader)?) + Self::RoutineControl( as SingleValueWireFormat>::decode(reader)?) } UdsServiceType::SecurityAccess => { - Self::SecurityAccess(SecurityAccessResponse::decode(reader)?) + Self::SecurityAccess(::decode(reader)?) } UdsServiceType::TesterPresent => { - Self::TesterPresent(TesterPresentResponse::decode(reader)?) + Self::TesterPresent(::decode(reader)?) } UdsServiceType::NegativeResponse => { - Self::NegativeResponse(NegativeResponse::decode(reader)?) + Self::NegativeResponse(::decode(reader)?) } UdsServiceType::WriteDataByIdentifier => { - Self::WriteDataByIdentifier(WriteDataByIdentifierResponse::decode(reader)?) + Self::WriteDataByIdentifier( as SingleValueWireFormat>::decode(reader)?) } UdsServiceType::Authentication => { return Err(Error::ServiceNotImplemented(UdsServiceType::Authentication)); @@ -329,7 +330,7 @@ impl SingleValueWireFormat for Response { return Err(Error::ServiceNotImplemented(UdsServiceType::RequestUpload)); } UdsServiceType::TransferData => { - Self::TransferData(TransferDataResponse::decode(reader)?) + Self::TransferData(::decode(reader)?) } UdsServiceType::UnsupportedDiagnosticService => { return Err(Error::ServiceNotImplemented( @@ -339,3 +340,147 @@ impl SingleValueWireFormat for Response { }) } } + +// --------------------------------------------------------------------------- +// no_std RX response enum (zero-copy, no DiagnosticDefinition needed) +// --------------------------------------------------------------------------- + +/// Zero-copy RX response. Borrows from the wire buffer. +/// +/// Unlike [`Response`], this enum does not require a [`DiagnosticDefinition`] +/// generic parameter — variable-length payloads are stored as raw `&'a [u8]` +/// slices that can be further parsed on demand. +#[derive(Clone, Debug)] +#[non_exhaustive] +pub enum ResponseRx<'a> { + /// Positive response to `ClearDiagnosticInfo`. + ClearDiagnosticInfo, + /// Positive response to `CommunicationControl`. + CommunicationControl(CommunicationControlResponse), + /// Positive response to `ControlDTCSettings`. + ControlDTCSettings(ControlDTCSettingsResponse), + /// Positive response to `DiagnosticSessionControl`. + DiagnosticSessionControl(DiagnosticSessionControlResponse), + /// Positive response to `EcuReset`. + EcuReset(EcuResetResponse), + /// Negative response to any request. + NegativeResponse(NegativeResponse), + /// Positive response to `ReadDataByIdentifier`. Raw payload bytes. + ReadDataByIdentifier(&'a [u8]), + /// Positive response to `ReadDTCInformation` with lazy iterators. + ReadDTCInfo(ReadDTCInfoResponseRx<'a>), + /// Positive response to `RequestDownload`. + RequestDownload(RequestDownloadResponseTx<'a>), + /// Positive response to `RequestTransferExit`. + RequestTransferExit, + /// Positive response to `RoutineControl`. Raw status record bytes. + RoutineControl { + /// The routine control sub-function echo. + routine_control_type: u8, + /// Raw routine status record bytes. + raw_status_record: &'a [u8], + }, + /// Positive response to `SecurityAccess`. + SecurityAccess(SecurityAccessResponseTx<'a>), + /// Positive response to `TesterPresent`. + TesterPresent(TesterPresentResponse), + /// Positive response to `TransferData`. + TransferData(TransferDataResponseTx<'a>), + /// Positive response to `WriteDataByIdentifier`. Contains the echoed DID bytes. + WriteDataByIdentifier(&'a [u8]), +} + +impl<'a> Decode<'a> for ResponseRx<'a> { + fn decode(buf: &'a [u8]) -> Result<(Self, &'a [u8]), Error> { + if buf.is_empty() { + return Err(Error::InsufficientData(1)); + } + let service = UdsServiceType::response_from_byte(buf[0]); + let payload = &buf[1..]; + + let response = match service { + UdsServiceType::ClearDiagnosticInfo => Self::ClearDiagnosticInfo, + UdsServiceType::CommunicationControl => { + let (resp, _) = ::decode(payload)?; + Self::CommunicationControl(resp) + } + UdsServiceType::ControlDTCSettings => { + let (resp, _) = ::decode(payload)?; + Self::ControlDTCSettings(resp) + } + UdsServiceType::DiagnosticSessionControl => { + let (resp, _) = + ::decode(payload)?; + Self::DiagnosticSessionControl(resp) + } + UdsServiceType::EcuReset => { + let (resp, _) = ::decode(payload)?; + Self::EcuReset(resp) + } + UdsServiceType::NegativeResponse => { + let (resp, _) = ::decode(payload)?; + Self::NegativeResponse(resp) + } + UdsServiceType::ReadDataByIdentifier => Self::ReadDataByIdentifier(payload), + UdsServiceType::ReadDTCInfo => { + let (resp, _) = ::decode(payload)?; + Self::ReadDTCInfo(resp) + } + UdsServiceType::RequestDownload => { + let (resp, _) = ::decode(payload)?; + Self::RequestDownload(resp) + } + UdsServiceType::RequestTransferExit => Self::RequestTransferExit, + UdsServiceType::RoutineControl => { + if payload.is_empty() { + return Err(Error::InsufficientData(2)); + } + Self::RoutineControl { + routine_control_type: payload[0], + raw_status_record: &payload[1..], + } + } + UdsServiceType::SecurityAccess => { + let (resp, _) = ::decode(payload)?; + Self::SecurityAccess(resp) + } + UdsServiceType::TesterPresent => { + let (resp, _) = ::decode(payload)?; + Self::TesterPresent(resp) + } + UdsServiceType::TransferData => { + let (resp, _) = ::decode(payload)?; + Self::TransferData(resp) + } + UdsServiceType::WriteDataByIdentifier => Self::WriteDataByIdentifier(payload), + _ => return Err(Error::ServiceNotImplemented(service)), + }; + Ok((response, &[])) + } +} + +/// Zero-copy raw RX response. Borrows from the wire buffer. +/// +/// Replaces the allocating [`UdsResponse`] for `no_std` use. +#[derive(Clone, Debug)] +pub struct UdsResponseRx<'a> { + /// The service this response corresponds to. + pub service: UdsServiceType, + /// The raw payload bytes following the service identifier. + pub data: &'a [u8], +} + +impl<'a> Decode<'a> for UdsResponseRx<'a> { + fn decode(buf: &'a [u8]) -> Result<(Self, &'a [u8]), Error> { + if buf.is_empty() { + return Err(Error::InsufficientData(1)); + } + Ok(( + Self { + service: UdsServiceType::response_from_byte(buf[0]), + data: &buf[1..], + }, + &[], + )) + } +} diff --git a/src/traits.rs b/src/traits.rs index d398fdf..fb74db0 100644 --- a/src/traits.rs +++ b/src/traits.rs @@ -332,6 +332,22 @@ where } } +/// `no_std`-compatible trait for TX-side diagnostic definitions. +/// +/// Specifies the identifier and payload types used when *constructing* UDS +/// requests and responses. Associated types implement [`Encode`] rather than +/// the `std`-dependent [`WireFormat`] / [`SingleValueWireFormat`] traits. +pub trait DiagnosticDefinitionTx: 'static { + /// UDS Data Identifier type. + type DID: Identifier + Clone + core::fmt::Debug + PartialEq + 'static; + /// Payload type for [`ReadDataByIdentifierRequestTx`](crate::ReadDataByIdentifierRequestTx) etc. + type DiagnosticPayload: Encode + Clone + core::fmt::Debug + PartialEq + 'static; + /// UDS Routine Identifier type. + type RID: RoutineIdentifier + Clone + core::fmt::Debug + PartialEq + 'static; + /// Payload type for routine control requests/responses. + type RoutinePayload: Encode + Clone + core::fmt::Debug + PartialEq + 'static; +} + /// A trait that defines the user-defined diagnostic definitions/specifiers for UDS requests and responses. /// /// Used to specify the types of the identifiers and payloads used in UDS requests and responses. From 2fafc37f8f412624c4a9b8f1b1324ffae0a8b311 Mon Sep 17 00:00:00 2001 From: Zach Heylmun Date: Fri, 3 Apr 2026 09:02:17 -0400 Subject: [PATCH 08/58] add alloc-gated convenience methods on no_std types Behind #[cfg(feature = "alloc")]: - collect_all() on DtcAndStatusIter, DtcFaultDetectionIter, DtcSeverityAndStatusIter for collecting lazy iterators into Vec - to_owned() on TransferDataRequestTx/ResponseTx for converting to allocating TransferDataRequest/Response - to_owned() on SecurityAccessRequestTx/ResponseTx for converting to allocating SecurityAccessRequest/Response - extern crate alloc when alloc feature is enabled --- src/lib.rs | 4 ++++ src/services/read_dtc_information.rs | 31 ++++++++++++++++++++++++++++ src/services/security_access.rs | 20 ++++++++++++++++++ src/services/transfer_data.rs | 14 +++++++++++++ 4 files changed, 69 insertions(+) diff --git a/src/lib.rs b/src/lib.rs index 8d22e6f..e215175 100644 --- a/src/lib.rs +++ b/src/lib.rs @@ -1,6 +1,10 @@ #![doc = include_str!(concat!(env!("CARGO_MANIFEST_DIR"), "/README.md"))] #![warn(clippy::pedantic, missing_docs)] #![cfg_attr(not(feature = "std"), no_std)] + +#[cfg(feature = "alloc")] +extern crate alloc; + mod error; pub use error::Error; diff --git a/src/services/read_dtc_information.rs b/src/services/read_dtc_information.rs index 4e1ad8a..e8908b8 100644 --- a/src/services/read_dtc_information.rs +++ b/src/services/read_dtc_information.rs @@ -1151,6 +1151,15 @@ impl<'a> DtcAndStatusIter<'a> { pub const fn is_empty(&self) -> bool { self.remaining.is_empty() } + + /// Collect all records into a `Vec`. + /// + /// # Errors + /// Returns an error if the byte data contains a partial record. + #[cfg(feature = "alloc")] + pub fn collect_all(self) -> Result, Error> { + self.collect() + } } impl Iterator for DtcAndStatusIter<'_> { @@ -1184,6 +1193,17 @@ impl<'a> DtcFaultDetectionIter<'a> { pub const fn new(data: &'a [u8]) -> Self { Self { remaining: data } } + + /// Collect all records into a `Vec`. + /// + /// # Errors + /// Returns an error if the byte data contains a partial record. + #[cfg(feature = "alloc")] + pub fn collect_all( + self, + ) -> Result, Error> { + self.collect() + } } impl Iterator for DtcFaultDetectionIter<'_> { @@ -1221,6 +1241,17 @@ impl<'a> DtcSeverityAndStatusIter<'a> { pub const fn new(data: &'a [u8]) -> Self { Self { remaining: data } } + + /// Collect all triples into a `Vec`. + /// + /// # Errors + /// Returns an error if the byte data contains a partial record. + #[cfg(feature = "alloc")] + pub fn collect_all( + self, + ) -> Result, Error> { + self.collect() + } } impl Iterator for DtcSeverityAndStatusIter<'_> { diff --git a/src/services/security_access.rs b/src/services/security_access.rs index 3e205f8..145a9d0 100644 --- a/src/services/security_access.rs +++ b/src/services/security_access.rs @@ -208,6 +208,17 @@ impl<'d> SecurityAccessRequestTx<'d> { pub const fn request_data(&self) -> &[u8] { self.request_data } + + /// Convert to the owned (allocating) [`SecurityAccessRequest`]. + #[cfg(feature = "alloc")] + #[must_use] + pub fn to_owned(&self) -> SecurityAccessRequest { + SecurityAccessRequest::new( + self.suppress_positive_response(), + self.access_type(), + self.request_data.to_vec(), + ) + } } impl Encode for SecurityAccessRequestTx<'_> { @@ -264,6 +275,15 @@ impl<'d> SecurityAccessResponseTx<'d> { } } +impl SecurityAccessResponseTx<'_> { + /// Convert to the owned (allocating) [`SecurityAccessResponse`]. + #[cfg(feature = "alloc")] + #[must_use] + pub fn to_owned(&self) -> SecurityAccessResponse { + SecurityAccessResponse::new(self.access_type, self.security_seed.to_vec()) + } +} + impl Encode for SecurityAccessResponseTx<'_> { fn encoded_size(&self) -> usize { 1 + self.security_seed.len() diff --git a/src/services/transfer_data.rs b/src/services/transfer_data.rs index b9748c8..e5b169a 100644 --- a/src/services/transfer_data.rs +++ b/src/services/transfer_data.rs @@ -147,6 +147,13 @@ impl<'d> TransferDataRequestTx<'d> { data, } } + + /// Convert to the owned (allocating) [`TransferDataRequest`]. + #[cfg(feature = "alloc")] + #[must_use] + pub fn to_owned(&self) -> TransferDataRequest { + TransferDataRequest::new(self.block_sequence_counter, self.data.to_vec()) + } } impl Encode for TransferDataRequestTx<'_> { @@ -196,6 +203,13 @@ impl<'d> TransferDataResponseTx<'d> { data, } } + + /// Convert to the owned (allocating) [`TransferDataResponse`]. + #[cfg(feature = "alloc")] + #[must_use] + pub fn to_owned(&self) -> TransferDataResponse { + TransferDataResponse::new(self.block_sequence_counter, self.data.to_vec()) + } } impl Encode for TransferDataResponseTx<'_> { From 27c6a94ac269670f2aafe439b0be78f23c3501fc Mon Sep 17 00:00:00 2001 From: Zach Heylmun Date: Fri, 3 Apr 2026 09:04:21 -0400 Subject: [PATCH 09/58] deprecate old WireFormat traits and add no_std API tests - Deprecate WireFormat, SingleValueWireFormat, IterableWireFormat traits with messages pointing to Encode/Decode/DecodeIter replacements - Deprecate UdsResponse in favor of UdsResponseRx - Add roundtrip tests for the new no_std API: - TesterPresent Encode/Decode roundtrip - TransferDataRequestTx Encode/Decode roundtrip - ResponseRx decoding (TesterPresent, NegativeResponse) - RequestRx decoding (EcuReset) - DtcAndStatusIter lazy parsing - Const construction verification --- src/lib.rs | 81 +++++++++++++++++++++++++++++++++++++++++++++++++ src/response.rs | 1 + src/traits.rs | 3 ++ 3 files changed, 85 insertions(+) diff --git a/src/lib.rs b/src/lib.rs index e215175..d669277 100644 --- a/src/lib.rs +++ b/src/lib.rs @@ -1,5 +1,6 @@ #![doc = include_str!(concat!(env!("CARGO_MANIFEST_DIR"), "/README.md"))] #![warn(clippy::pedantic, missing_docs)] +#![allow(deprecated)] // Old WireFormat traits are deprecated but still used internally #![cfg_attr(not(feature = "std"), no_std)] #[cfg(feature = "alloc")] @@ -177,3 +178,83 @@ impl TryFrom for DtcSettings { } } } + +#[cfg(test)] +mod no_std_api_tests { + use super::*; + + #[test] + fn encode_decode_tester_present_roundtrip() { + let req = TesterPresentRequest::new(false); + let mut buf = [0u8; 8]; + let written = Encode::encode(&req, &mut buf.as_mut_slice()).unwrap(); + assert_eq!(written, 1); + + let (decoded, rest) = ::decode(&buf[..written]).unwrap(); + assert_eq!(decoded, req); + assert!(rest.is_empty()); + } + + #[test] + fn encode_decode_transfer_data_tx_roundtrip() { + let data = [0x01, 0x02, 0x03, 0x04]; + let req = TransferDataRequestTx::new(0x05, &data); + let mut buf = [0u8; 16]; + let written = Encode::encode(&req, &mut buf.as_mut_slice()).unwrap(); + assert_eq!(written, 5); + + let (decoded, _) = ::decode(&buf[..written]).unwrap(); + assert_eq!(decoded.block_sequence_counter, 0x05); + assert_eq!(decoded.data, &[0x01, 0x02, 0x03, 0x04]); + } + + #[test] + fn decode_response_rx_tester_present() { + // TesterPresent response: SID=0x7E, sub=0x00 + let wire = [0x7E, 0x00]; + let (resp, _) = ResponseRx::decode(&wire).unwrap(); + assert!(matches!(resp, ResponseRx::TesterPresent(_))); + } + + #[test] + fn decode_response_rx_negative() { + // NegativeResponse: SID=0x7F, service=0x10, NRC=0x12 + let wire = [0x7F, 0x10, 0x12]; + let (resp, _) = ResponseRx::decode(&wire).unwrap(); + assert!(matches!(resp, ResponseRx::NegativeResponse(_))); + } + + #[test] + fn decode_request_rx_ecu_reset() { + // EcuReset request: SID=0x11, sub=0x01 (HardReset) + let wire = [0x11, 0x01]; + let (req, _) = RequestRx::decode(&wire).unwrap(); + assert!(matches!(req, RequestRx::EcuReset(_))); + assert_eq!(req.service(), UdsServiceType::EcuReset); + } + + #[test] + fn dtc_and_status_iter_roundtrip() { + // 2 DTC records: (0x01,0x02,0x03, status=0x0A), (0x04,0x05,0x06, status=0x0B) + let data = [0x01, 0x02, 0x03, 0x0A, 0x04, 0x05, 0x06, 0x0B]; + let iter = DtcAndStatusIter::new(&data); + assert_eq!(iter.len(), 2); + + let records: Vec<_> = iter.map(|r| r.unwrap()).collect(); + assert_eq!(records.len(), 2); + assert_eq!(u32::from(records[0].0), 0x010203); + assert_eq!(u32::from(records[1].0), 0x040506); + } + + #[test] + fn const_construction() { + // Verify const construction works at compile time + const _REQ: TransferDataRequestTx<'static> = + TransferDataRequestTx::new(1, &[0x01, 0x02, 0x03]); + const _SEC: SecurityAccessRequestTx<'static> = SecurityAccessRequestTx::new( + false, + SecurityAccessType::RequestSeed(0x01), + &[0xAA, 0xBB], + ); + } +} diff --git a/src/response.rs b/src/response.rs index 17122d7..12400f5 100644 --- a/src/response.rs +++ b/src/response.rs @@ -12,6 +12,7 @@ use byteorder_embedded_io::io::{ReadBytesExt, WriteBytesExt}; use std::io::{Read, Write}; /// A raw UDS response consisting of the service type and its unparsed payload bytes. +#[deprecated(note = "use `UdsResponseRx` instead for zero-copy parsing")] #[non_exhaustive] pub struct UdsResponse { /// The service this response corresponds to. diff --git a/src/traits.rs b/src/traits.rs index fb74db0..e8e6b56 100644 --- a/src/traits.rs +++ b/src/traits.rs @@ -62,6 +62,7 @@ pub trait DecodeIter<'a>: Sized { /// /// This split enforces at compile time the distinction between types that always /// decode successfully (given valid data) and types that can signal "no more items." +#[deprecated(note = "use `Encode` instead for the TX path")] pub trait WireFormat: Sized { /// Returns the number of bytes required to serialize this value. fn required_size(&self) -> usize; @@ -85,6 +86,7 @@ pub trait WireFormat: Sized { /// /// This trait enforces at compile time that `decode` cannot return `None`. /// The return type is `Result` rather than `Result, Error>`. +#[deprecated(note = "use `Decode` instead for the RX path")] pub trait SingleValueWireFormat: WireFormat { /// Deserialize a value from a byte stream. /// # Errors @@ -116,6 +118,7 @@ impl Iterator for WireFormatIterator<'_ /// /// `decode_next` returns `Ok(None)` when the stream is exhausted, allowing /// iteration over variable-length sequences without prior knowledge of their size. +#[deprecated(note = "use `DecodeIter` instead for the RX path")] pub trait IterableWireFormat: WireFormat { /// Attempt to decode the next value from the stream. /// Returns `Ok(None)` if the stream is exhausted. From 512e17acc842fb61042cd0060d5aa433c50c6e60 Mon Sep 17 00:00:00 2001 From: Zach Heylmun Date: Fri, 3 Apr 2026 12:28:11 -0400 Subject: [PATCH 10/58] remove deprecated WireFormat traits and old Vec-based types MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit BREAKING: Remove the entire old API surface: - Remove WireFormat, SingleValueWireFormat, IterableWireFormat traits - Remove old DiagnosticDefinition trait (std-dependent bounds) - Remove old Request/Response enums and all builder methods - Remove old Vec-based service types (SecurityAccessRequest, TransferDataRequest, etc.) and their impls - Remove old UdsResponse, ProtocolPayload, ProtocolRoutinePayload - Remove ReadDTCInfoResponse (old Vec-based) and all subfunction response types - Remove ReadDataByIdentifierRequest/Response (old Vec-based) - Remove RoutineControlRequest/Response (old Vec-based) - Remove WriteDataByIdentifierRequest/Response (old Vec-based) - Remove RequestFileTransferRequest/Response impls - Remove all WireFormat/SingleValueWireFormat/IterableWireFormat impls Rename no_std types to take over clean names: - DiagnosticDefinitionTx → DiagnosticDefinition - RequestRx → Request, ResponseRx → Response - UdsResponseRx → UdsResponse - *Tx<'d> types keep Tx suffix for now (renamed in follow-up) --- src/common/dtc_ext_data.rs | 137 +- src/common/dtc_snapshot.rs | 360 +--- src/common/dtc_status.rs | 137 +- src/common/format_identifiers.rs | 21 +- src/common/primitive_generics.rs | 197 +-- src/lib.rs | 73 +- src/protocol_definitions.rs | 241 +-- src/request.rs | 567 +------ src/response.rs | 366 +--- src/services/clear_dtc_information.rs | 30 +- src/services/communication_control.rs | 63 +- src/services/control_dtc_settings.rs | 50 +- src/services/diagnostic_session_control.rs | 53 +- src/services/ecu_reset.rs | 52 +- src/services/mod.rs | 2 +- src/services/negative_response.rs | 25 +- src/services/read_data_by_identifier.rs | 454 +---- src/services/read_dtc_information.rs | 1769 +------------------- src/services/request_download.rs | 74 +- src/services/request_file_transfer.rs | 424 +---- src/services/routine_control.rs | 191 +-- src/services/security_access.rs | 57 +- src/services/tester_present.rs | 45 +- src/services/transfer_data.rs | 51 +- src/services/write_data_by_identifier.rs | 175 +- src/traits.rs | 334 +--- 26 files changed, 263 insertions(+), 5685 deletions(-) diff --git a/src/common/dtc_ext_data.rs b/src/common/dtc_ext_data.rs index f2738be..52f4629 100644 --- a/src/common/dtc_ext_data.rs +++ b/src/common/dtc_ext_data.rs @@ -1,16 +1,10 @@ -use byteorder_embedded_io::io::{ReadBytesExt, WriteBytesExt}; - -use crate::{ - DTCRecord, DTCStatusMask, Error, IterableWireFormat, SingleValueWireFormat, WireFormat, -}; - /// The `DTCExtDataRecordNumber` is used in the request message to get a stored [`DTCExtDataRecord`] /// Its used to specify the type of `DTCExtDataRecord` to be reported. #[cfg_attr(feature = "serde", derive(serde::Deserialize, serde::Serialize))] #[cfg_attr(feature = "utoipa", derive(utoipa::ToSchema))] #[derive(Clone, Copy, Debug, Eq, PartialEq)] pub enum DTCExtDataRecordNumber { - /// ISO/SAE reserved record numbers (`0x00`, `0xF0–0xFD`). + /// ISO/SAE reserved record numbers (`0x00`, `0xF0-0xFD`). ISOSAEReserved(u8), /// Vehicle manufactured specific stored [`DTCExtDataRecord`]s @@ -71,135 +65,6 @@ impl PartialEq for DTCExtDataRecordNumber { } } -impl WireFormat for DTCExtDataRecordNumber { - fn required_size(&self) -> usize { - 1 - } - - fn encode(&self, writer: &mut T) -> Result { - writer.write_u8(self.value())?; - Ok(self.required_size()) - } -} - -impl SingleValueWireFormat for DTCExtDataRecordNumber { - fn decode(reader: &mut T) -> Result { - Ok(Self::new(reader.read_u8()?)) - } -} - -impl IterableWireFormat for DTCExtDataRecordNumber { - fn decode_next(reader: &mut T) -> Result, Error> { - match reader.read_u8() { - Ok(v) => Ok(Some(Self::new(v))), - Err(_) => Ok(None), - } - } -} - -#[cfg_attr(feature = "serde", derive(serde::Deserialize, serde::Serialize))] -#[cfg_attr(feature = "utoipa", derive(utoipa::ToSchema))] -#[derive(Clone, Debug, PartialEq)] -/// A single DTC extended-data record containing user-defined payload items. -pub struct DTCExtDataRecord { - /// The decoded payload entries for this record. - pub data: Vec, -} - -impl WireFormat for DTCExtDataRecord { - fn required_size(&self) -> usize { - // n bytes of data per UserPayload - self.data - .iter() - .map(WireFormat::required_size) - .sum::() - } - - fn encode(&self, writer: &mut T) -> Result { - for d in &self.data { - d.encode(writer)?; - } - Ok(self.required_size()) - } -} - -impl SingleValueWireFormat for DTCExtDataRecord { - fn decode(reader: &mut T) -> Result { - let mut data = Vec::new(); - for payload in UserPayload::decode_iter(reader) { - match payload { - Ok(p) => data.push(p), - Err(_) => break, - } - } - Ok(Self { data }) - } -} - -impl IterableWireFormat for DTCExtDataRecord { - fn decode_next(reader: &mut T) -> Result, Error> { - let mut data = Vec::new(); - for payload in UserPayload::decode_iter(reader) { - match payload { - Err(_) => return Ok(None), - Ok(payload) => data.push(payload), - } - } - Ok(Some(Self { data })) - } -} - -#[cfg_attr(feature = "serde", derive(serde::Deserialize, serde::Serialize))] -#[cfg_attr(feature = "utoipa", derive(utoipa::ToSchema))] -#[derive(Clone, Debug, PartialEq)] -/// A DTC extended-data record list: a DTC + status mask followed by one or more [`DTCExtDataRecord`]s. -pub struct DTCExtDataRecordList { - /// The DTC this extended data belongs to. - pub mask_record: DTCRecord, - /// The DTC status mask at the time of reporting. - pub status_mask: DTCStatusMask, - /// The extended-data records associated with this DTC. - pub record_data: Vec>, -} - -impl WireFormat for DTCExtDataRecordList { - fn required_size(&self) -> usize { - self.mask_record.required_size() - + self.status_mask.required_size() - + self - .record_data - .iter() - .map(WireFormat::required_size) - .sum::() - } - - fn encode(&self, writer: &mut T) -> Result { - self.mask_record.encode(writer)?; - self.status_mask.encode(writer)?; - for record in &self.record_data { - record.encode(writer)?; - } - Ok(self.required_size()) - } -} - -impl SingleValueWireFormat for DTCExtDataRecordList { - fn decode(reader: &mut T) -> Result { - let mask_record = DTCRecord::decode(reader)?; - let status_mask = DTCStatusMask::decode(reader)?; - let mut record_data = Vec::new(); - // Read the record number, and then the payload - if let Some(record) = DTCExtDataRecord::decode_next(reader)? { - record_data.push(record); - } - Ok(Self { - mask_record, - status_mask, - record_data, - }) - } -} - // tests #[cfg(test)] mod tests { diff --git a/src/common/dtc_snapshot.rs b/src/common/dtc_snapshot.rs index e7b1c8b..fea2021 100644 --- a/src/common/dtc_snapshot.rs +++ b/src/common/dtc_snapshot.rs @@ -1,159 +1,6 @@ //! Diagnostic Trouble Code (DTC) Snapshot Data //! Snapshot data represents a collection of sensor values captured when a DTC is triggered. //! Represents the state of the server at the time the DTC was triggered. -use byteorder_embedded_io::io::{ReadBytesExt, WriteBytesExt}; - -use crate::{ - DTCRecord, DTCStatusMask, Error, IterableWireFormat, SingleValueWireFormat, WireFormat, -}; - -#[cfg_attr(feature = "serde", derive(serde::Deserialize, serde::Serialize))] -#[cfg_attr(feature = "utoipa", derive(utoipa::ToSchema))] -#[derive(Clone, Debug, PartialEq)] -/// A DTC snapshot record list: a DTC + status mask followed by one or more numbered snapshot records. -pub struct DTCSnapshotRecordList { - /// The DTC this snapshot data belongs to. - pub dtc_record: DTCRecord, - /// The DTC status mask at the time of reporting. - pub status_mask: DTCStatusMask, - /// The snapshot records, each paired with its record number. - pub snapshot_data: Vec<(DTCSnapshotRecordNumber, DTCSnapshotRecord)>, -} - -impl WireFormat for DTCSnapshotRecordList { - fn required_size(&self) -> usize { - self.dtc_record.required_size() - + self.status_mask.required_size() - + self - .snapshot_data - .iter() - .fold(0, |acc, (record_number, record)| { - acc + record_number.required_size() + record.required_size() - }) - } - - fn encode(&self, writer: &mut T) -> Result { - self.dtc_record.encode(writer)?; - self.status_mask.encode(writer)?; - for (record_number, record) in &self.snapshot_data { - record_number.encode(writer)?; - record.encode(writer)?; - } - - Ok(self.required_size()) - } -} - -impl SingleValueWireFormat for DTCSnapshotRecordList { - fn decode(reader: &mut T) -> Result { - let dtc_record = DTCRecord::decode(reader)?; - let status_mask = DTCStatusMask::decode(reader)?; - - // Loop until we can't read any more records - let mut snapshot_data = Vec::new(); - loop { - let record_number = match DTCSnapshotRecordNumber::decode_next(reader) { - Ok(Some(record_number)) => record_number, - Ok(None) => break, - Err(e) => return Err(e), - }; - - let record = DTCSnapshotRecord::decode(reader)?; - - snapshot_data.push((record_number, record)); - } - - Ok(Self { - dtc_record, - status_mask, - snapshot_data, - }) - } -} - -/// Contains a snapshot of data values from the time of the system malfunction occurrence. -#[cfg_attr(feature = "serde", derive(serde::Deserialize, serde::Serialize))] -#[cfg_attr(feature = "utoipa", derive(utoipa::ToSchema))] -#[derive(Clone, Debug, PartialEq)] -pub struct DTCSnapshotRecord { - /// The data identifier (DID) for the data values taken at the time of the system malfunction occurrence - /// These can be vehicle manufacturer specific - /// See C.1 for broad categories of data identifiers - /// The data values taken at the time of the system malfunction occurrence - /// The data values are dependent on the data identifier, and are specified by the vehicle manufacturer/supplier - pub data: Vec, -} - -impl DTCSnapshotRecord { - /// Create a new snapshot record from a list of payload items. - #[must_use] - pub fn new(data: Vec) -> Self { - Self { data } - } - - /// The number of DIDs in the snapshot record - /// If the number of DIDs exceeds 0xFF, the value 0x00 shall be used - #[allow(clippy::cast_possible_truncation)] - #[must_use] - pub fn number_of_dids(&self) -> u8 { - if self.data.len() > 0xFF { - 0 - } else { - self.data.len() as u8 - } - } -} - -impl WireFormat for DTCSnapshotRecord { - fn required_size(&self) -> usize { - 1 + self - .data - .iter() - .map(WireFormat::required_size) - .sum::() - } - - // TODO: Must write the DIDs as well... - fn encode(&self, writer: &mut T) -> Result { - // write 0x00 if the number of DIDs exceed 0xFF - writer.write_u8(self.number_of_dids())?; - - let mut payload_written = 0; - for payload in &self.data { - // Assumes this writes the DID as well, I think that's safe? - payload_written += payload.encode(writer)?; - } - Ok(1 + payload_written) - } -} - -impl SingleValueWireFormat for DTCSnapshotRecord { - #[allow(clippy::cast_possible_truncation)] - fn decode(reader: &mut T) -> Result { - let number_of_dids = reader.read_u8()?; - // Make sure we read the correct number of DIDs, 0 means unlimited (or at least more than 0xFF) - let mut data = Vec::new(); - for payload in UserPayload::decode_iter(reader) { - match payload { - Ok(did) => { - data.push(did); - // Do not attempt to read more than the number of DIDs the server said it would send - if number_of_dids != 0 && data.len() == number_of_dids as usize { - break; - } - } - Err(e) => { - return Err(e); - } - } - } - if number_of_dids != 0x00 && number_of_dids != data.len() as u8 { - return Err(Error::IncorrectMessageLengthOrInvalidFormat); - } - - Ok(Self { data }) - } -} /// Identifies which DTC snapshot record is being requested or reported. #[cfg_attr(feature = "serde", derive(serde::Deserialize, serde::Serialize))] @@ -196,214 +43,17 @@ impl PartialEq for DTCSnapshotRecordNumber { } } -impl WireFormat for DTCSnapshotRecordNumber { - fn required_size(&self) -> usize { - 1 - } - - fn encode(&self, writer: &mut T) -> Result { - writer.write_u8(self.value())?; - Ok(1) - } -} - -impl SingleValueWireFormat for DTCSnapshotRecordNumber { - fn decode(reader: &mut T) -> Result { - Ok(Self::new(reader.read_u8()?)) - } -} - -impl IterableWireFormat for DTCSnapshotRecordNumber { - fn decode_next(reader: &mut T) -> Result, Error> { - let Ok(record_number) = reader.read_u8() else { - return Ok(None); - }; - Ok(Some(Self::new(record_number))) - } -} - #[cfg(test)] mod snapshot { - - pub enum ProtocolPayload { - Did4711([u8; 5]), - Did8711([u8; 5]), - Did8712(u8, u8, u16), - } - // Testing out a macro to make simplifying the enum to DID value "nicer" - macro_rules! value_map { - ($(($e:ident, $v:literal)),* $(,)?) => { - pub fn value(&self) -> u16 { - match self { - $(ProtocolPayload::$e(..) => $v,)* - } - } - } - } - impl ProtocolPayload { - #[rustfmt::skip] - value_map![ - (Did4711, 0x4711), - (Did8711, 0x8711), - (Did8712, 0x8712), - ]; - } - - impl WireFormat for ProtocolPayload { - #[allow(clippy::match_same_arms)] - fn required_size(&self) -> usize { - 2 + match self { - ProtocolPayload::Did4711(_) => 5, - ProtocolPayload::Did8711(_) => 5, - ProtocolPayload::Did8712(..) => 4, - } - } - - fn encode(&self, writer: &mut T) -> Result { - writer.write_u16::(self.value())?; - let mut written = 2; - - match self { - ProtocolPayload::Did8711(data) | ProtocolPayload::Did4711(data) => { - writer.write_all(data)?; - written += data.len(); - } - // bogus data - ProtocolPayload::Did8712(..) => { - writer.write_u32::(78)?; - written += 4; - } - } - Ok(written) - } - } - - impl IterableWireFormat for ProtocolPayload { - fn decode_next(reader: &mut T) -> Result, Error> { - let mut identifier_data: [u8; 2] = [0; 2]; - match reader.read(&mut identifier_data)? { - 0 => return Ok(None), - 1 => return Err(Error::IncorrectMessageLengthOrInvalidFormat), - 2 => (), - _ => unreachable!("Impossible to read more than 2 bytes into 2 byte array"), - } - // read the identifier - let identifier = u16::from_be_bytes(identifier_data); - match identifier { - 0x4711 => { - let mut did_4711 = [0u8; 5]; - match reader.read(&mut did_4711)? { - 0 => return Ok(None), - 1 => return Err(Error::IncorrectMessageLengthOrInvalidFormat), - 5 => (), - _ => unreachable!("Impossible to read more than 5 bytes into 5 byte array"), - } - Ok(Some(Self::Did4711(did_4711))) - } - 0x8711 => { - let mut did_8711 = [0u8; 5]; - match reader.read(&mut did_8711)? { - 0 => return Ok(None), - 1 => return Err(Error::IncorrectMessageLengthOrInvalidFormat), - 5 => (), - _ => unreachable!("Impossible to read more than 5 bytes into 5 byte array"), - } - Ok(Some(Self::Did8711(did_8711))) - } - _ => Err(Error::IncorrectMessageLengthOrInvalidFormat), - } - } - } - use super::*; #[test] - fn snapshot_record() { + fn snapshot_record_number() { let record = DTCSnapshotRecordNumber::new(0x01); - let mut writer = Vec::new(); - let written_number = record.encode(&mut writer).unwrap(); - assert_eq!(record.required_size(), 1); - assert_eq!(written_number, 1); - } - - #[test] - fn test_value() { - let did = ProtocolPayload::Did8712(1, 2, 3); - assert_eq!(did.value(), 0x8712); - - match did { - ProtocolPayload::Did8712(a, b, c) => { - assert_eq!(a, 1); - assert_eq!(b, 2); - assert_eq!(c, 3); - } - _ => panic!("Expected Did8712"), - } - } - - #[test] - #[allow(clippy::cast_possible_truncation)] - #[allow(clippy::match_wildcard_for_single_variants)] - fn snapshot_list() { - #[rustfmt::skip] - let bytes:[u8; 29] = [ - // DTC Number + Status - 0x12, 0x34, 0x56, 0x24, - // DTC Snapshot Record Number - 0x01, - // Number of DIDs to read - 0x02, - // DID (fake) - 0x47, 0x11, - // Snapshot data - 0xA6, 0x66, 0x07, 0x50, 0x20, - 0x87, 0x11, - 0x00, 0x00, 0x00, 0x00, 0x09, - // New DTC Snapshot record number - 0x02, - // Number of DIDs to read (0 indicates an unlimited number) - 0x01, - 0x47, 0x11, - 0xA6, 0x66, 0x07, 0x50, 0x20, - ]; - - let resp = DTCSnapshotRecordList::decode(&mut bytes.as_slice()).unwrap(); - - assert_eq!(resp.dtc_record, DTCRecord::from(0x0012_3456)); - let mut number: u8 = 1; + assert_eq!(record.value(), 0x01); + assert_eq!(record, DTCSnapshotRecordNumber::Number(0x01)); - resp.snapshot_data - .iter() - .for_each(|(record_number, record)| { - // Check the record numbers match for the ones we're expecting - assert_eq!(*record_number, number); - number += 1; - // Just check the helper function - assert_eq!(record.number_of_dids(), record.data.len() as u8); - // check the data of the payload - for payload in &record.data { - match payload { - ProtocolPayload::Did4711(data) => { - assert_eq!(data, &[0xA6, 0x66, 0x07, 0x50, 0x20]); - } - ProtocolPayload::Did8711(data) => { - assert_eq!(data, &[0x00, 0x00, 0x00, 0x00, 0x09]); - } - _ => panic!("Unexpected payload in bagging area"), - } - let mut writer = Vec::new(); - let written = payload.encode(&mut writer).unwrap(); - assert_eq!(written, payload.required_size()); - } - }); - let mut writer = Vec::new(); - let written = resp.encode(&mut writer).unwrap(); - assert_eq!(written, resp.required_size()); - assert_eq!( - written, - bytes.len(), - "Written bytes: \n{writer:?}\n{bytes:?}" - ); - assert_eq!(writer, bytes); + let all = DTCSnapshotRecordNumber::new(0xFF); + assert_eq!(all, DTCSnapshotRecordNumber::All); } } diff --git a/src/common/dtc_status.rs b/src/common/dtc_status.rs index 5e010d3..b1821fb 100644 --- a/src/common/dtc_status.rs +++ b/src/common/dtc_status.rs @@ -1,7 +1,6 @@ use bitmask_enum::bitmask; -use byteorder_embedded_io::io::{ReadBytesExt, WriteBytesExt}; -use crate::{Decode, DecodeIter, Encode, Error, IterableWireFormat, SingleValueWireFormat, WireFormat}; +use crate::{Decode, DecodeIter, Encode, Error}; /// Bit-packed DTC status information used by the `ReadDTCInformation` service /// @@ -107,21 +106,22 @@ pub enum DTCStatusMask { WarningIndicatorRequested, } -impl WireFormat for DTCStatusMask { - fn required_size(&self) -> usize { +impl Encode for DTCStatusMask { + fn encoded_size(&self) -> usize { 1 } - - fn encode(&self, writer: &mut T) -> Result { - writer.write_u8(self.bits())?; + fn encode(&self, writer: &mut impl embedded_io::Write) -> Result { + writer.write_all(&[self.bits()]).map_err(Error::io)?; Ok(1) } } -impl SingleValueWireFormat for DTCStatusMask { - fn decode(reader: &mut T) -> Result { - let status_byte = reader.read_u8()?; - Ok(Self::from(status_byte)) +impl<'a> Decode<'a> for DTCStatusMask { + fn decode(buf: &'a [u8]) -> Result<(Self, &'a [u8]), Error> { + if buf.is_empty() { + return Err(Error::InsufficientData(1)); + } + Ok((Self::from(buf[0]), &buf[1..])) } } @@ -230,51 +230,12 @@ impl From for u32 { } } -impl WireFormat for DTCRecord { - fn required_size(&self) -> usize { - 3 - } - - fn encode(&self, writer: &mut T) -> Result { - writer.write_all(&[self.high_byte, self.middle_byte, self.low_byte])?; - Ok(3) - } -} - -impl SingleValueWireFormat for DTCRecord { - fn decode(reader: &mut T) -> Result { - let high_byte = reader.read_u8()?; - let middle_byte = reader.read_u8()?; - let low_byte = reader.read_u8()?; - Ok(Self { - high_byte, - middle_byte, - low_byte, - }) - } -} - -impl IterableWireFormat for DTCRecord { - fn decode_next(reader: &mut T) -> Result, crate::Error> { - let Ok(high_byte) = reader.read_u8() else { - return Ok(None); - }; - let middle_byte = reader.read_u8()?; - let low_byte = reader.read_u8()?; - Ok(Some(Self { - high_byte, - middle_byte, - low_byte, - })) - } -} - impl Encode for DTCRecord { fn encoded_size(&self) -> usize { 3 } - fn encode(&self, writer: &mut impl embedded_io::Write) -> Result { + fn encode(&self, writer: &mut impl embedded_io::Write) -> Result { writer .write_all(&[self.high_byte, self.middle_byte, self.low_byte]) .map_err(Error::io)?; @@ -283,7 +244,7 @@ impl Encode for DTCRecord { } impl<'a> Decode<'a> for DTCRecord { - fn decode(buf: &'a [u8]) -> Result<(Self, &'a [u8]), crate::Error> { + fn decode(buf: &'a [u8]) -> Result<(Self, &'a [u8]), Error> { if buf.len() < 3 { return Err(Error::InsufficientData(3)); } @@ -299,7 +260,7 @@ impl<'a> Decode<'a> for DTCRecord { } impl<'a> DecodeIter<'a> for DTCRecord { - fn decode_next(buf: &'a [u8]) -> Result, crate::Error> { + fn decode_next(buf: &'a [u8]) -> Result, Error> { if buf.is_empty() { return Ok(None); } @@ -423,7 +384,7 @@ pub enum DTCSeverityMask { } impl DTCSeverityMask { - /// Returns `true` if at least one DTC class bit (bits 0–4) is set. + /// Returns `true` if at least one DTC class bit (bits 0-4) is set. /// Multiple class bits may be set to query multiple DTC classes at once. #[must_use] pub fn is_valid(&self) -> bool { @@ -457,28 +418,6 @@ impl DTCStoredDataRecordNumber { } } -impl WireFormat for DTCStoredDataRecordNumber { - fn required_size(&self) -> usize { - 1 - } - - fn encode(&self, writer: &mut T) -> Result { - writer.write_u8(self.0)?; - Ok(1) - } -} - -impl SingleValueWireFormat for DTCStoredDataRecordNumber { - fn decode(reader: &mut T) -> Result { - let value = reader.read_u8()?; - if value == 0x00 { - // Reserved for Legislative purposes - return Err(Error::ReservedForLegislativeUse(value)); - } - Ok(Self(value)) - } -} - impl From for DTCStoredDataRecordNumber { fn from(value: u8) -> Self { Self(value) @@ -500,40 +439,6 @@ pub struct DTCSeverityRecord { pub dtc_status_mask: DTCStatusMask, } -impl WireFormat for DTCSeverityRecord { - fn required_size(&self) -> usize { - 6 - } - - fn encode(&self, writer: &mut T) -> Result { - writer.write_u8(self.severity.bits())?; - writer.write_u8(self.functional_group_identifier.value())?; - WireFormat::encode(&self.dtc_record, writer)?; - WireFormat::encode(&self.dtc_status_mask, writer)?; - Ok(self.required_size()) - } -} - -impl IterableWireFormat for DTCSeverityRecord { - fn decode_next(reader: &mut T) -> Result, Error> { - let Ok(sev) = reader.read_u8() else { - return Ok(None); - }; - - let severity = DTCSeverityMask::from(sev); - let functional_group_identifier = FunctionalGroupIdentifier::from(reader.read_u8()?); - let dtc_record = ::decode(reader)?; - let dtc_status_mask = DTCStatusMask::from(reader.read_u8()?); - - Ok(Some(Self { - severity, - functional_group_identifier, - dtc_record, - dtc_status_mask, - })) - } -} - #[cfg(test)] mod dtc_status_tests { use super::*; @@ -563,11 +468,13 @@ mod dtc_status_tests { } #[test] - fn dtc_record() { + fn dtc_record_encode_decode() { let record = DTCRecord::new(0x01, 0x02, 0x03); - let mut writer = Vec::new(); - let written_number = WireFormat::encode(&record, &mut writer).unwrap(); - assert_eq!(record.required_size(), 3); - assert_eq!(written_number, 3); + let mut buf = [0u8; 3]; + let written = Encode::encode(&record, &mut buf.as_mut_slice()).unwrap(); + assert_eq!(written, 3); + let (decoded, rest) = ::decode(&buf).unwrap(); + assert_eq!(decoded, record); + assert!(rest.is_empty()); } } diff --git a/src/common/format_identifiers.rs b/src/common/format_identifiers.rs index 72ff97d..eed06c0 100644 --- a/src/common/format_identifiers.rs +++ b/src/common/format_identifiers.rs @@ -1,5 +1,4 @@ -use crate::{Error, SingleValueWireFormat, WireFormat}; -use byteorder_embedded_io::io::{ReadBytesExt, WriteBytesExt}; +use crate::Error; const LOW_NIBBLE_MASK: u8 = 0b0000_1111; const HIGH_NIBBLE_MASK: u8 = 0b1111_0000; @@ -160,24 +159,6 @@ impl PartialEq for DataFormatIdentifier { } } -impl WireFormat for DataFormatIdentifier { - fn required_size(&self) -> usize { - 1 - } - - fn encode(&self, writer: &mut T) -> Result { - writer.write_u8(u8::from(*self))?; - Ok(1) - } -} - -impl SingleValueWireFormat for DataFormatIdentifier { - fn decode(reader: &mut T) -> Result { - let value = reader.read_u8()?; - Ok(DataFormatIdentifier::from(value)) - } -} - #[cfg(test)] mod tests { use super::*; diff --git a/src/common/primitive_generics.rs b/src/common/primitive_generics.rs index 818a5a3..2a580a7 100644 --- a/src/common/primitive_generics.rs +++ b/src/common/primitive_generics.rs @@ -1,64 +1,4 @@ -use crate::{Decode, Encode, Error, SingleValueWireFormat, WireFormat}; -use byteorder_embedded_io::BigEndian; -use byteorder_embedded_io::io::{ReadBytesExt, WriteBytesExt}; - -/// Implement [`WireFormat`] and [`SingleValueWireFormat`] for unsigned integer primitives. -#[macro_export] -macro_rules! unsigned_primitive_wire_format { - ( $($primitive:ty), * ) => { - $( - impl WireFormat for $primitive { - fn required_size(&self) -> usize { - std::mem::size_of::<$primitive>() - } - fn encode(&self, writer: &mut W) -> Result { - writer.write_uint128::(u128::from(*self), self.required_size())?; - Ok(self.required_size()) - } - } - impl SingleValueWireFormat for $primitive { - fn decode(reader: &mut T) -> Result { - let value: $primitive = reader - .read_uint128::(std::mem::size_of::<$primitive>())? - .try_into() - .expect("Failed to convert value to the target primitive type"); - Ok(value) - } - } - )* - }; -} - -unsigned_primitive_wire_format!(u8, u16, u32, u64, u128); - -/// Implement [`WireFormat`] and [`SingleValueWireFormat`] for signed integer primitives. -#[macro_export] -macro_rules! signed_primitive_wire_format { - ( $($primitive:ty), * ) => { - $( - impl WireFormat for $primitive { - fn required_size(&self) -> usize { - std::mem::size_of::<$primitive>() - } - fn encode(&self, writer: &mut W) -> Result { - writer.write_int128::(i128::from(*self), self.required_size())?; - Ok(self.required_size()) - } - } - impl SingleValueWireFormat for $primitive { - fn decode(reader: &mut T) -> Result { - let value: $primitive = reader - .read_int128::(std::mem::size_of::<$primitive>())? - .try_into() - .expect("Failed to convert value to the target primitive type"); - Ok(value) - } - } - )* - }; -} - -signed_primitive_wire_format!(i8, i16, i32, i64, i128); +use crate::{Decode, Encode, Error}; /// Implement [`Encode`] and [`Decode`] for unsigned integer primitives (no_std-compatible). macro_rules! unsigned_primitive_encode_decode { @@ -162,119 +102,60 @@ impl<'a> Decode<'a> for f64 { } } -impl WireFormat for f32 { - fn required_size(&self) -> usize { - 4 - } - fn encode(&self, writer: &mut W) -> Result { - writer.write_f32::(*self)?; - Ok(self.required_size()) - } -} - -impl SingleValueWireFormat for f32 { - fn decode(reader: &mut T) -> Result { - let value: f32 = reader.read_f32::()?; - Ok(value) - } -} - -impl WireFormat for f64 { - fn required_size(&self) -> usize { - 8 - } - fn encode(&self, writer: &mut W) -> Result { - writer.write_f64::(*self)?; - Ok(self.required_size()) - } -} - -impl SingleValueWireFormat for f64 { - fn decode(reader: &mut T) -> Result { - let value: f64 = reader.read_f64::()?; - Ok(value) - } -} - #[cfg(test)] mod tests { use super::*; #[test] - fn test_u8() { - // Read some bytes - let data = vec![0xFF]; - let mut reader = &data[..]; - - let u8_byte = ::decode(&mut reader).unwrap(); - assert_eq!(u8_byte, 0xFF); - assert_eq!(u8_byte.required_size(), 1); - - let mut write_buffer = vec![]; - WireFormat::encode(&u8_byte, &mut write_buffer).unwrap(); - assert_eq!(write_buffer, data); + fn test_u8_encode_decode() { + let val: u8 = 0xFF; + let mut buf = [0u8; 1]; + Encode::encode(&val, &mut buf.as_mut_slice()).unwrap(); + assert_eq!(buf, [0xFF]); + let (decoded, rest) = ::decode(&buf).unwrap(); + assert_eq!(decoded, 0xFF); + assert!(rest.is_empty()); } #[test] - fn test_u16() { - // Read some bytes - let data = vec![0xFF, 0x01]; - let mut reader = &data[..]; - - let u16_byte = ::decode(&mut reader).unwrap(); - assert_eq!(u16_byte, 0xFF01); - assert_eq!(u16_byte.required_size(), 2); - - let mut write_buffer = vec![]; - WireFormat::encode(&u16_byte, &mut write_buffer).unwrap(); - assert_eq!(write_buffer, data); + fn test_u16_encode_decode() { + let val: u16 = 0xFF01; + let mut buf = [0u8; 2]; + Encode::encode(&val, &mut buf.as_mut_slice()).unwrap(); + assert_eq!(buf, [0xFF, 0x01]); + let (decoded, rest) = ::decode(&buf).unwrap(); + assert_eq!(decoded, 0xFF01); + assert!(rest.is_empty()); } #[test] - fn test_u32() { - // Read some bytes - let data = vec![0xFF, 0x20, 0x02, 0x01]; - let mut reader = &data[..]; - - let u32_byte = ::decode(&mut reader).unwrap(); - assert_eq!(u32_byte, 0xFF20_0201); - assert_eq!(u32_byte.required_size(), 4); - - let mut write_buffer = vec![]; - WireFormat::encode(&u32_byte, &mut write_buffer).unwrap(); - assert_eq!(write_buffer, data); + fn test_u32_encode_decode() { + let val: u32 = 0xFF20_0201; + let mut buf = [0u8; 4]; + Encode::encode(&val, &mut buf.as_mut_slice()).unwrap(); + assert_eq!(buf, [0xFF, 0x20, 0x02, 0x01]); + let (decoded, rest) = ::decode(&buf).unwrap(); + assert_eq!(decoded, 0xFF20_0201); + assert!(rest.is_empty()); } #[test] - fn test_u64() { - // Read some bytes - let data = vec![0xFF, 0x20, 0x02, 0x01, 0xFF, 0x20, 0x02, 0x01]; - let mut reader = &data[..]; - - let u64_byte = ::decode(&mut reader).unwrap(); - assert_eq!(u64_byte, 0xFF20_0201_FF20_0201); - assert_eq!(u64_byte.required_size(), 8); - - let mut write_buffer = vec![]; - WireFormat::encode(&u64_byte, &mut write_buffer).unwrap(); - assert_eq!(write_buffer, data); + fn test_u64_encode_decode() { + let val: u64 = 0xFF20_0201_FF20_0201; + let mut buf = [0u8; 8]; + Encode::encode(&val, &mut buf.as_mut_slice()).unwrap(); + let (decoded, rest) = ::decode(&buf).unwrap(); + assert_eq!(decoded, val); + assert!(rest.is_empty()); } #[test] - fn test_u128() { - // Read some bytes - let data = vec![ - 0xFF, 0x20, 0x02, 0x01, 0xFF, 0x20, 0x02, 0x01, 0xFF, 0x20, 0x02, 0x01, 0xFF, 0x20, - 0x02, 0x01, - ]; - let mut reader = &data[..]; - - let u128_byte = ::decode(&mut reader).unwrap(); - assert_eq!(u128_byte, 0xFF20_0201_FF20_0201_FF20_0201_FF20_0201); - assert_eq!(u128_byte.required_size(), 16); - - let mut write_buffer = vec![]; - WireFormat::encode(&u128_byte, &mut write_buffer).unwrap(); - assert_eq!(write_buffer, data); + fn test_u128_encode_decode() { + let val: u128 = 0xFF20_0201_FF20_0201_FF20_0201_FF20_0201; + let mut buf = [0u8; 16]; + Encode::encode(&val, &mut buf.as_mut_slice()).unwrap(); + let (decoded, rest) = ::decode(&buf).unwrap(); + assert_eq!(decoded, val); + assert!(rest.is_empty()); } } diff --git a/src/lib.rs b/src/lib.rs index d669277..3e167c7 100644 --- a/src/lib.rs +++ b/src/lib.rs @@ -1,6 +1,5 @@ #![doc = include_str!(concat!(env!("CARGO_MANIFEST_DIR"), "/README.md"))] #![warn(clippy::pedantic, missing_docs)] -#![allow(deprecated)] // Old WireFormat traits are deprecated but still used internally #![cfg_attr(not(feature = "std"), no_std)] #[cfg(feature = "alloc")] @@ -11,8 +10,7 @@ pub use error::Error; mod traits; pub use traits::{ - Decode, DecodeIter, DiagnosticDefinition, DiagnosticDefinitionTx, Encode, Identifier, - IterableWireFormat, RoutineIdentifier, SingleValueWireFormat, WireFormat, + Decode, DecodeIter, DiagnosticDefinition, Encode, Identifier, RoutineIdentifier, }; mod common; @@ -20,15 +18,14 @@ pub use common::*; mod protocol_definitions; pub use protocol_definitions::{ - ProtocolIdentifier, ProtocolPayload, ProtocolPayloadTx, ProtocolRoutinePayload, - ProtocolRoutinePayloadTx, + ProtocolIdentifier, ProtocolPayloadTx, ProtocolRoutinePayloadTx, }; mod request; -pub use request::{Request, RequestRx}; +pub use request::Request; mod response; -pub use response::{Response, ResponseRx, UdsResponse, UdsResponseRx}; +pub use response::{Response, UdsResponse}; mod service; pub use service::UdsServiceType; @@ -50,26 +47,14 @@ pub const PENDING: u8 = 0x78; #[cfg_attr(feature = "utoipa", derive(utoipa::ToSchema))] #[derive(Clone, Copy, Debug, Eq, PartialEq)] pub struct UdsSpec; -impl DiagnosticDefinition for UdsSpec { - type RID = UDSRoutineIdentifier; - type DID = ProtocolIdentifier; - type RoutinePayload = ProtocolRoutinePayload; - type DiagnosticPayload = ProtocolPayload; -} -impl DiagnosticDefinitionTx for UdsSpec { +impl DiagnosticDefinition for UdsSpec { type RID = UDSRoutineIdentifier; type DID = ProtocolIdentifier; type RoutinePayload = ProtocolRoutinePayloadTx<'static>; type DiagnosticPayload = ProtocolPayloadTx<'static>; } -/// Type alias for a UDS Request type that only implements the messages explicitly defined by the UDS specification. -pub type ProtocolRequest = Request; - -/// Type alias for a UDS Response type that only implements the messages explicitly defined by the UDS specification. -pub type ProtocolResponse = Response; - /// What type of routine control to perform for a [`RoutineControlRequest`]. #[cfg_attr(feature = "serde", derive(serde::Deserialize, serde::Serialize))] #[cfg_attr(feature = "utoipa", derive(utoipa::ToSchema))] @@ -114,36 +99,6 @@ impl TryFrom for RoutineControlSubFunction { } } -#[cfg(feature = "alloc")] -impl WireFormat for Vec { - fn required_size(&self) -> usize { - self.len() - } - - fn encode(&self, writer: &mut T) -> Result { - writer.write_all(self)?; - Ok(self.len()) - } -} - -#[cfg(feature = "alloc")] -impl SingleValueWireFormat for Vec { - fn decode(reader: &mut T) -> Result { - let mut data = Vec::new(); - reader.read_to_end(&mut data)?; - Ok(data) - } -} - -#[cfg(feature = "alloc")] -impl IterableWireFormat for Vec { - fn decode_next(reader: &mut T) -> Result, Error> { - let mut data = Vec::new(); - reader.read_to_end(&mut data)?; - Ok(Some(data)) - } -} - #[cfg_attr(feature = "serde", derive(serde::Deserialize, serde::Serialize))] #[cfg_attr(feature = "utoipa", derive(utoipa::ToSchema))] #[cfg_attr(feature = "clap", derive(clap::ValueEnum))] @@ -209,27 +164,27 @@ mod no_std_api_tests { } #[test] - fn decode_response_rx_tester_present() { + fn decode_response_tester_present() { // TesterPresent response: SID=0x7E, sub=0x00 let wire = [0x7E, 0x00]; - let (resp, _) = ResponseRx::decode(&wire).unwrap(); - assert!(matches!(resp, ResponseRx::TesterPresent(_))); + let (resp, _) = Response::decode(&wire).unwrap(); + assert!(matches!(resp, Response::TesterPresent(_))); } #[test] - fn decode_response_rx_negative() { + fn decode_response_negative() { // NegativeResponse: SID=0x7F, service=0x10, NRC=0x12 let wire = [0x7F, 0x10, 0x12]; - let (resp, _) = ResponseRx::decode(&wire).unwrap(); - assert!(matches!(resp, ResponseRx::NegativeResponse(_))); + let (resp, _) = Response::decode(&wire).unwrap(); + assert!(matches!(resp, Response::NegativeResponse(_))); } #[test] - fn decode_request_rx_ecu_reset() { + fn decode_request_ecu_reset() { // EcuReset request: SID=0x11, sub=0x01 (HardReset) let wire = [0x11, 0x01]; - let (req, _) = RequestRx::decode(&wire).unwrap(); - assert!(matches!(req, RequestRx::EcuReset(_))); + let (req, _) = Request::decode(&wire).unwrap(); + assert!(matches!(req, Request::EcuReset(_))); assert_eq!(req.service(), UdsServiceType::EcuReset); } diff --git a/src/protocol_definitions.rs b/src/protocol_definitions.rs index 8fd2ee7..ed30059 100644 --- a/src/protocol_definitions.rs +++ b/src/protocol_definitions.rs @@ -1,9 +1,8 @@ use crate::{ - Decode, DecodeIter, Encode, Error, IterableWireFormat, SingleValueWireFormat, UDSIdentifier, - UDSRoutineIdentifier, WireFormat, impl_identifier, + Decode, DecodeIter, Encode, Error, UDSIdentifier, + UDSRoutineIdentifier, impl_identifier, }; -use std::ops::Deref; -use tracing::error; +use core::ops::Deref; /// Protocol Identifier provides an implementation of Diagnostics Identifiers that only supports Diagnostic Identifiers defined by UDS #[cfg_attr(feature = "serde", derive(serde::Deserialize, serde::Serialize))] @@ -20,14 +19,6 @@ impl ProtocolIdentifier { pub fn new(identifier: UDSIdentifier) -> Self { ProtocolIdentifier { identifier } } - - /// Convert an iterator of [`UDSIdentifier`]s into a `Vec`. - pub fn identifiers(list: I) -> Vec - where - I: IntoIterator, - { - list.into_iter().map(Self::new).collect() - } } impl TryFrom for ProtocolIdentifier { @@ -52,210 +43,6 @@ impl Deref for ProtocolIdentifier { } } -/// The UDS protocol does not define the structure of any payload, but exists as a container for diagnostic implementations that use the generic UDS identifiers -#[cfg_attr(feature = "serde", derive(serde::Deserialize, serde::Serialize))] -#[cfg_attr(feature = "utoipa", derive(utoipa::ToSchema))] -#[derive(Clone, Eq, PartialEq)] -#[non_exhaustive] -pub struct ProtocolPayload { - /// The UDS data identifier this payload belongs to. - pub identifier: UDSIdentifier, - /// The raw payload bytes following the identifier. - pub payload: Vec, -} - -impl ProtocolPayload { - /// Creates a new `ProtocolPayload` with the given identifier and payload - #[must_use] - pub fn new(identifier: UDSIdentifier, payload: Vec) -> Self { - ProtocolPayload { - identifier, - payload, - } - } -} -impl WireFormat for ProtocolPayload { - fn required_size(&self) -> usize { - 2 + self.payload.len() - } - - fn encode(&self, writer: &mut T) -> Result { - WireFormat::encode(&self.identifier, writer)?; - writer.write_all(&self.payload)?; - Ok(self.required_size()) - } -} - -impl SingleValueWireFormat for ProtocolPayload { - fn decode(reader: &mut T) -> Result { - let mut identifier_data: [u8; 2] = [0; 2]; - match reader.read(&mut identifier_data)? { - 0 | 1 => { - error!( - "Only read 0 or 1 byte of identifier, need 2: read byte was: {}", - identifier_data[0] - ); - return Err(Error::IncorrectMessageLengthOrInvalidFormat); - } - 2 => (), - _ => unreachable!("Impossible to read more than 2 bytes into 2 byte array"), - } - let identifier = UDSIdentifier::try_from(u16::from_be_bytes(identifier_data))?; - let mut payload: Vec = Vec::new(); - reader.read_to_end(&mut payload)?; - Ok(ProtocolPayload { - identifier, - payload, - }) - } -} - -impl IterableWireFormat for ProtocolPayload { - fn decode_next(reader: &mut T) -> Result, Error> { - let mut identifier_data: [u8; 2] = [0; 2]; - match reader.read(&mut identifier_data)? { - 0 => return Ok(None), - 1 => { - error!( - "Only read 1 byte of identifier, need 2: read byte was: {}", - identifier_data[0] - ); - return Err(Error::IncorrectMessageLengthOrInvalidFormat); - } - 2 => (), - _ => unreachable!("Impossible to read more than 2 bytes into 2 byte array"), - } - let identifier = UDSIdentifier::try_from(u16::from_be_bytes(identifier_data))?; - // Reads the entire payload, but does not have the ability to determine the amount of bytes to read - // depending on the Identifier, so all data is read until EOF - // - // TODO: We could be more clever, we do know the response size of some identifiers - let mut payload: Vec = Vec::new(); - reader.read_to_end(&mut payload)?; - Ok(Some(ProtocolPayload { - identifier, - payload, - })) - } -} - -impl core::fmt::Debug for ProtocolPayload { - fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result { - write!(f, "{} =>", self.identifier)?; - for b in &self.payload { - write!(f, " {b:02X}")?; - } - Ok(()) - } -} - -/// Routine-specific payload for [`UdsSpec`](crate::UdsSpec). -/// -/// Used as the `RoutinePayload` associated type in [`UdsSpec`](crate::UdsSpec). -/// On the wire, the routine identifier is already encoded by the -/// [`RoutineControlRequest`](crate::RoutineControlRequest), so `encode` writes -/// only the raw payload bytes. `decode` reads the identifier first (since -/// [`RoutineControlResponse`](crate::RoutineControlResponse) includes it in the -/// status record) followed by any remaining payload bytes. -#[cfg_attr(feature = "serde", derive(serde::Deserialize, serde::Serialize))] -#[cfg_attr(feature = "utoipa", derive(utoipa::ToSchema))] -#[derive(Clone, Eq, PartialEq)] -#[non_exhaustive] -pub struct ProtocolRoutinePayload { - /// The routine identifier this payload belongs to. - pub identifier: UDSRoutineIdentifier, - /// The raw payload bytes following the identifier. - pub payload: Vec, -} - -impl ProtocolRoutinePayload { - /// Creates a new `ProtocolRoutinePayload` with the given identifier and payload. - #[must_use] - pub fn new(identifier: UDSRoutineIdentifier, payload: Vec) -> Self { - Self { - identifier, - payload, - } - } -} - -impl WireFormat for ProtocolRoutinePayload { - /// Size of the raw payload only — the identifier is written by the request. - fn required_size(&self) -> usize { - self.payload.len() - } - - /// Writes only the raw payload bytes. The routine identifier is already - /// encoded by [`RoutineControlRequest::encode`](crate::RoutineControlRequest). - fn encode(&self, writer: &mut T) -> Result { - writer.write_all(&self.payload)?; - Ok(self.payload.len()) - } -} - -impl SingleValueWireFormat for ProtocolRoutinePayload { - fn decode(reader: &mut T) -> Result { - let mut identifier_data: [u8; 2] = [0; 2]; - match reader.read(&mut identifier_data)? { - 0 | 1 => { - error!( - "Only read 0 or 1 byte of routine identifier, need 2: read byte was: {}", - identifier_data[0] - ); - return Err(Error::IncorrectMessageLengthOrInvalidFormat); - } - 2 => (), - _ => unreachable!("Impossible to read more than 2 bytes into 2 byte array"), - } - let identifier = UDSRoutineIdentifier::from(u16::from_be_bytes(identifier_data)); - let mut payload: Vec = Vec::new(); - reader.read_to_end(&mut payload)?; - Ok(Self { - identifier, - payload, - }) - } -} - -impl IterableWireFormat for ProtocolRoutinePayload { - fn decode_next(reader: &mut T) -> Result, Error> { - let mut identifier_data: [u8; 2] = [0; 2]; - match reader.read(&mut identifier_data)? { - 0 => return Ok(None), - 1 => { - error!( - "Only read 1 byte of routine identifier, need 2: read byte was: {}", - identifier_data[0] - ); - return Err(Error::IncorrectMessageLengthOrInvalidFormat); - } - 2 => (), - _ => unreachable!("Impossible to read more than 2 bytes into 2 byte array"), - } - let identifier = UDSRoutineIdentifier::from(u16::from_be_bytes(identifier_data)); - let mut payload: Vec = Vec::new(); - reader.read_to_end(&mut payload)?; - Ok(Some(Self { - identifier, - payload, - })) - } -} - -impl core::fmt::Debug for ProtocolRoutinePayload { - fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result { - write!(f, "{:?} =>", self.identifier)?; - for b in &self.payload { - write!(f, " {b:02X}")?; - } - Ok(()) - } -} - -// --------------------------------------------------------------------------- -// no_std TX/RX types (borrow from caller/wire buffer) -// --------------------------------------------------------------------------- - /// Zero-alloc protocol payload. Borrows the raw payload bytes. #[derive(Clone, Copy, Eq, PartialEq)] pub struct ProtocolPayloadTx<'d> { @@ -345,7 +132,7 @@ impl<'d> ProtocolRoutinePayloadTx<'d> { } impl Encode for ProtocolRoutinePayloadTx<'_> { - /// Size of the raw payload only — the identifier is written by the request. + /// Size of the raw payload only -- the identifier is written by the request. fn encoded_size(&self) -> usize { self.payload.len() } @@ -399,18 +186,20 @@ mod tests { #[test] fn test_construction_and_debug_format() { - let payload = ProtocolPayload::new(UDSIdentifier::ActiveDiagnosticSession, vec![0x01]); + let payload = ProtocolPayloadTx::new(UDSIdentifier::ActiveDiagnosticSession, &[0x01]); assert_eq!(format!("{payload:?}"), "0xF186 => 01"); - let mut buffer = Vec::new(); - assert_eq!(3, payload.encode(&mut buffer).unwrap()); + let mut buf = [0u8; 8]; + let written = Encode::encode(&payload, &mut buf.as_mut_slice()).unwrap(); + assert_eq!(written, 3); } #[test] - fn test_read_and_write() { - let payload = ProtocolPayload::new(UDSIdentifier::ActiveDiagnosticSession, vec![0x03]); - let mut buffer = Vec::new(); - assert_eq!(3, payload.encode(&mut buffer).unwrap()); - let deserialized_payload = ProtocolPayload::decode(&mut buffer.as_slice()).unwrap(); - assert_eq!(payload, deserialized_payload); + fn test_encode_and_decode() { + let payload = ProtocolPayloadTx::new(UDSIdentifier::ActiveDiagnosticSession, &[0x03]); + let mut buf = [0u8; 8]; + let written = Encode::encode(&payload, &mut buf.as_mut_slice()).unwrap(); + assert_eq!(written, 3); + let (decoded, _) = ProtocolPayloadTx::decode(&buf[..written]).unwrap(); + assert_eq!(payload, decoded); } } diff --git a/src/request.rs b/src/request.rs index c6f396a..42622b3 100644 --- a/src/request.rs +++ b/src/request.rs @@ -1,483 +1,22 @@ //! Module for making and handling UDS Requests use crate::{ - Decode, DiagnosticDefinition, Error, NegativeResponseCode, ReadDTCInfoRequest, ResetType, - SecurityAccessType, SingleValueWireFormat, WireFormat, + Decode, Error, services::{ ClearDiagnosticInfoRequest, CommunicationControlRequest, ControlDTCSettingsRequest, - DiagnosticSessionControlRequest, EcuResetRequest, ReadDataByIdentifierRequest, - RequestDownloadRequest, RoutineControlRequest, SecurityAccessRequest, - SecurityAccessRequestTx, TesterPresentRequest, TransferDataRequest, TransferDataRequestTx, - WriteDataByIdentifierRequest, + DiagnosticSessionControlRequest, EcuResetRequest, RequestDownloadRequest, + SecurityAccessRequestTx, TesterPresentRequest, TransferDataRequestTx, }, }; -use byteorder_embedded_io::io::{ReadBytesExt, WriteBytesExt}; -use std::io::{Read, Write}; -use super::{ - CommunicationControlType, CommunicationType, DTCRecord, DataFormatIdentifier, - DiagnosticSessionType, DtcSettings, ReadDTCInfoSubFunction, RoutineControlSubFunction, - service::UdsServiceType, -}; - -/// UDS Request types -/// Each variant corresponds to a request for a different UDS service -/// The variants contain all request data for each service -#[cfg_attr(feature = "serde", derive(serde::Deserialize, serde::Serialize))] -#[cfg_attr(feature = "utoipa", derive(utoipa::ToSchema))] -#[derive(Clone, Debug, PartialEq)] -#[non_exhaustive] -pub enum Request { - /// Request to clear diagnostic information. See [`ClearDiagnosticInfoRequest`]. - ClearDiagnosticInfo(ClearDiagnosticInfoRequest), - /// Request to control communication. See [`CommunicationControlRequest`]. - CommunicationControl(CommunicationControlRequest), - /// Request to enable or disable DTC setting. See [`ControlDTCSettingsRequest`]. - ControlDTCSettings(ControlDTCSettingsRequest), - /// Request to change the diagnostic session. See [`DiagnosticSessionControlRequest`]. - DiagnosticSessionControl(DiagnosticSessionControlRequest), - /// Request to reset the ECU. See [`EcuResetRequest`]. - EcuReset(EcuResetRequest), - /// Request to read data by identifier. See [`ReadDataByIdentifierRequest`]. - ReadDataByIdentifier(ReadDataByIdentifierRequest), - /// Request to read DTC information. See [`ReadDTCInfoRequest`]. - ReadDTCInfo(ReadDTCInfoRequest), - /// Request to initiate a download. See [`RequestDownloadRequest`]. - RequestDownload(RequestDownloadRequest), - /// Request to exit an active transfer. - RequestTransferExit, - /// Request to control a routine. See [`RoutineControlRequest`]. - RoutineControl(RoutineControlRequest), - /// Request for security access. See [`SecurityAccessRequest`]. - SecurityAccess(SecurityAccessRequest), - /// Tester present keep-alive request. See [`TesterPresentRequest`]. - TesterPresent(TesterPresentRequest), - /// Request to transfer data. See [`TransferDataRequest`]. - TransferData(TransferDataRequest), - /// Request to write data by identifier. See [`WriteDataByIdentifierRequest`]. - WriteDataByIdentifier(WriteDataByIdentifierRequest), -} - -impl Request { - /// Create a `ClearDiagnosticInfo` request, clears diagnostic information in one or more servers' memory - #[must_use] - pub fn clear_diagnostic_info(group_of_dtc: DTCRecord, memory_selection: u8) -> Self { - Request::ClearDiagnosticInfo(ClearDiagnosticInfoRequest::new( - group_of_dtc, - memory_selection, - )) - } - /// Create a `ClearDiagnosticInfo` request that clears all DTC information in one or more servers' memory - #[must_use] - pub fn clear_all_dtc_info(memory_selection: u8) -> Self { - Request::ClearDiagnosticInfo(ClearDiagnosticInfoRequest::clear_all(memory_selection)) - } - - /// Create a `CommunicationControlRequest` with standard address information. - /// - /// # Panics - /// - /// Panics if one of the extended address control types is passed. - #[must_use] - pub fn communication_control( - communication_enable: CommunicationControlType, - communication_type: CommunicationType, - suppress_response: bool, - ) -> Self { - Request::CommunicationControl(CommunicationControlRequest::new( - suppress_response, - communication_enable, - communication_type, - )) - } - - /// Create a `CommunicationControl` request with extended address information. - /// This is used for the `EnableRxAndDisableTxWithEnhancedAddressInfo` and - /// `EnableRxAndTxWithEnhancedAddressInfo` communication control types. - /// - /// # Panics - /// - /// Panics if one of the standard address control types is passed. - #[must_use] - pub fn communication_control_with_node_id( - communication_enable: CommunicationControlType, - communication_type: CommunicationType, - node_id: u16, - suppress_response: bool, - ) -> Self { - Request::CommunicationControl(CommunicationControlRequest::new_with_node_id( - suppress_response, - communication_enable, - communication_type, - node_id, - )) - } - - /// Create a new `ControlDTCSettings` request - #[must_use] - pub fn control_dtc_settings(setting: DtcSettings, suppress_response: bool) -> Self { - Request::ControlDTCSettings(ControlDTCSettingsRequest::new(setting, suppress_response)) - } - - /// Create a new `DiagnosticSessionControl` request - #[must_use] - pub fn diagnostic_session_control( - suppress_positive_response: bool, - session_type: DiagnosticSessionType, - ) -> Self { - Request::DiagnosticSessionControl(DiagnosticSessionControlRequest::new( - suppress_positive_response, - session_type, - )) - } - - /// Create a new `EcuReset` request - #[must_use] - pub fn ecu_reset(suppress_positive_response: bool, reset_type: ResetType) -> Self { - Request::EcuReset(EcuResetRequest::new(suppress_positive_response, reset_type)) - } - - /// Create a new `ReadDataByIdentifier` request - pub fn read_data_by_identifier(dids: I) -> Self - where - I: IntoIterator, - { - Request::ReadDataByIdentifier(ReadDataByIdentifierRequest::new(dids)) - } - - /// Create a new `ReadDTCInformation` request for the given sub-function. - #[must_use] - pub fn read_dtc_information(sub_function: ReadDTCInfoSubFunction) -> Self { - Request::ReadDTCInfo(ReadDTCInfoRequest::new(sub_function)) - } - - /// Create a new `RequestDownload` request - /// `encryption_method`: vehicle manufacturer specific (0x0 for no encryption) - /// `compression_method`: vehicle manufacturer specific (0x0 for no compression) - /// `memory_address`: the address in memory to start downloading from (Maximum 40 bits - 1024GB) - /// `memory_size`: the size of the memory to download (Max 4GB) - /// - /// # Errors - /// Will generate an error of type `Error::InvalidEncryptionCompressionMethod()`. - /// Generated when `compression_method` or `encryption_method` > 0x15 - pub fn request_download( - encryption_method: u8, - compression_method: u8, - memory_address: u64, - memory_size: u32, - ) -> Result { - let data_format_identifier = - DataFormatIdentifier::new(compression_method, encryption_method)?; - - Ok(Request::RequestDownload(RequestDownloadRequest::new( - data_format_identifier, - memory_address, - memory_size, - )?)) - } - - /// Create a `RequestTransferExit` request to end an active upload or download. - #[must_use] - pub fn request_transfer_exit() -> Self { - Self::RequestTransferExit - } - - /// Create a new `RoutineControl` request with no payload - /// - /// **Note**: This does not check if the server requires a payload to perform the routine - /// # Parameters: - /// * `sub_function`: The type of routine control to perform. - /// * [`RoutineControlSubFunction::StartRoutine`] - /// * [`RoutineControlSubFunction::StopRoutine`] - /// * [`RoutineControlSubFunction::RequestRoutineResults`] - /// * `routine_id`: The identifier of the routine to control - pub fn routine_control(sub_function: RoutineControlSubFunction, routine_id: D::RID) -> Self { - Request::RoutineControl(RoutineControlRequest::new(sub_function, routine_id, None)) - } - - /// Create a new `RoutineControl` request - /// - /// **Note**: This could be cleaner as the Identifier is technically represented in the `RoutinePayload` - /// and if the `RoutinePayload` is a single value, then the `RoutineIdentifier` is not needed - /// - /// This does not check if the server requires a payload - /// - /// # Parameters: - /// * `sub_function`: The type of routine control to perform. - /// * [`RoutineControlSubFunction::StartRoutine`] - /// * [`RoutineControlSubFunction::StopRoutine`] - /// * [`RoutineControlSubFunction::RequestRoutineResults`] - /// * `routine_id`: The identifier of the routine to control. User defined routine identifiers and payloads are allowed - /// * General purpose/UDS defined: [`crate::UDSRoutineIdentifier`] - /// * `data`: Optional payload for the routine control request - pub fn routine_control_payload( - sub_function: RoutineControlSubFunction, - routine_id: D::RID, - data: Option, - ) -> Self { - Request::RoutineControl(RoutineControlRequest::new(sub_function, routine_id, data)) - } - - /// Create a new `SecurityAccess` request (seed or key phase). - #[must_use] - pub fn security_access( - suppress_positive_response: bool, - access_type: SecurityAccessType, - data_record: Vec, - ) -> Self { - Request::SecurityAccess(SecurityAccessRequest::new( - suppress_positive_response, - access_type, - data_record, - )) - } - - /// Create a new `TesterPresent` keep-alive request. - #[must_use] - pub fn tester_present(suppress_positive_response: bool) -> Self { - Request::TesterPresent(TesterPresentRequest::new(suppress_positive_response)) - } - - /// Create a new `TransferData` request with the given block-sequence counter and payload. - #[must_use] - pub fn transfer_data(sequence: u8, data: Vec) -> Self { - Request::TransferData(TransferDataRequest::new(sequence, data)) - } - - /// Create a new `WriteDataByIdentifier` request with the given payload. - pub fn write_data_by_identifier(payload: D::DiagnosticPayload) -> Self { - Request::WriteDataByIdentifier(WriteDataByIdentifierRequest::new(payload)) - } - - /// Returns the [`UdsServiceType`] corresponding to this request variant. - pub fn service(&self) -> UdsServiceType { - match self { - Self::ClearDiagnosticInfo(_) => UdsServiceType::ClearDiagnosticInfo, - Self::CommunicationControl(_) => UdsServiceType::CommunicationControl, - Self::ControlDTCSettings(_) => UdsServiceType::ControlDTCSettings, - Self::DiagnosticSessionControl(_) => UdsServiceType::DiagnosticSessionControl, - Self::EcuReset(_) => UdsServiceType::EcuReset, - Self::ReadDataByIdentifier(_) => UdsServiceType::ReadDataByIdentifier, - Self::ReadDTCInfo(_) => UdsServiceType::ReadDTCInfo, - Self::RequestDownload(_) => UdsServiceType::RequestDownload, - Self::RequestTransferExit => UdsServiceType::RequestTransferExit, - Self::RoutineControl(_) => UdsServiceType::RoutineControl, - Self::SecurityAccess(_) => UdsServiceType::SecurityAccess, - Self::TesterPresent(_) => UdsServiceType::TesterPresent, - Self::TransferData(_) => UdsServiceType::TransferData, - Self::WriteDataByIdentifier(_) => UdsServiceType::WriteDataByIdentifier, - } - } - - /// Returns the negative-response codes that are valid for this request's service. - pub fn allowed_nack_codes(&self) -> &'static [NegativeResponseCode] { - match self { - Self::ClearDiagnosticInfo(_) => ClearDiagnosticInfoRequest::allowed_nack_codes(), - Self::DiagnosticSessionControl(_) => { - DiagnosticSessionControlRequest::allowed_nack_codes() - } - Self::EcuReset(_) => EcuResetRequest::allowed_nack_codes(), - Self::SecurityAccess(_) => SecurityAccessRequest::allowed_nack_codes(), - Self::RequestDownload(_) => RequestDownloadRequest::allowed_nack_codes(), - _ => &[NegativeResponseCode::ServiceNotSupported], - } - } -} - -impl WireFormat for Request { - fn required_size(&self) -> usize { - 1 + match self { - Self::ClearDiagnosticInfo(cdi) => cdi.required_size(), - Self::CommunicationControl(cc) => cc.required_size(), - Self::ControlDTCSettings(ct) => ct.required_size(), - Self::DiagnosticSessionControl(ds) => ds.required_size(), - Self::EcuReset(er) => er.required_size(), - Self::ReadDataByIdentifier(rd) => rd.required_size(), - Self::ReadDTCInfo(rd) => rd.required_size(), - Self::RequestDownload(rd) => rd.required_size(), - Self::RequestTransferExit => 0, - Self::RoutineControl(rc) => rc.required_size(), - Self::SecurityAccess(sa) => sa.required_size(), - Self::TesterPresent(tp) => tp.required_size(), - Self::TransferData(td) => td.required_size(), - Self::WriteDataByIdentifier(wd) => wd.required_size(), - } - } - - /// Serialization function to write a [`Request`] to a [`Writer`](std::io::Write) - /// This function writes the service byte and then calls the appropriate - /// serialization function for the service represented by self. - fn encode(&self, writer: &mut W) -> Result { - // Write the service byte - writer.write_u8(self.service().request_service_to_byte())?; - // Write the payload - Ok(1 + match self { - Self::ClearDiagnosticInfo(cdi) => cdi.encode(writer), - Self::CommunicationControl(cc) => cc.encode(writer), - Self::ControlDTCSettings(ct) => ct.encode(writer), - Self::DiagnosticSessionControl(ds) => ds.encode(writer), - Self::EcuReset(er) => er.encode(writer), - Self::ReadDataByIdentifier(rd) => rd.encode(writer), - Self::ReadDTCInfo(rd) => rd.encode(writer), - Self::RequestDownload(rd) => rd.encode(writer), - Self::RequestTransferExit => Ok(0), - Self::RoutineControl(rc) => rc.encode(writer), - Self::SecurityAccess(sa) => sa.encode(writer), - Self::TesterPresent(tp) => tp.encode(writer), - Self::TransferData(td) => td.encode(writer), - Self::WriteDataByIdentifier(wd) => wd.encode(writer), - }?) - } - - fn is_positive_response_suppressed(&self) -> bool { - match self { - Self::CommunicationControl(cc) => cc.suppress_positive_response(), - Self::ControlDTCSettings(ct) => ct.is_positive_response_suppressed(), - Self::DiagnosticSessionControl(ds) => ds.suppress_positive_response(), - Self::EcuReset(er) => er.suppress_positive_response(), - Self::SecurityAccess(sa) => sa.suppress_positive_response(), - Self::TesterPresent(tp) => tp.suppress_positive_response(), - _ => false, - } - } -} - -impl SingleValueWireFormat for Request { - /// Deserialization function to read a [`Request`] from a [`Reader`](std::io::Read) - /// This function reads the service byte and then calls the appropriate - /// deserialization function for the service in question - /// - /// *Note*: - /// - /// Some services allow for custom byte arrays at the end of the request - /// It is important that only the request data is passed to this function - /// or the deserialization could read unexpected data - #[allow(clippy::too_many_lines)] - fn decode(reader: &mut R) -> Result { - let service = UdsServiceType::service_from_request_byte(reader.read_u8()?); - Ok(match service { - UdsServiceType::CommunicationControl => { - Self::CommunicationControl(::decode(reader)?) - } - UdsServiceType::ControlDTCSettings => { - Self::ControlDTCSettings(::decode(reader)?) - } - UdsServiceType::DiagnosticSessionControl => { - Self::DiagnosticSessionControl(::decode(reader)?) - } - UdsServiceType::EcuReset => Self::EcuReset(::decode(reader)?), - UdsServiceType::ReadDataByIdentifier => { - Self::ReadDataByIdentifier( as SingleValueWireFormat>::decode(reader)?) - } - UdsServiceType::ReadDTCInfo => Self::ReadDTCInfo(::decode(reader)?), - UdsServiceType::RequestDownload => { - Self::RequestDownload(::decode(reader)?) - } - UdsServiceType::RequestTransferExit => Self::RequestTransferExit, - UdsServiceType::RoutineControl => { - Self::RoutineControl( as SingleValueWireFormat>::decode(reader)?) - } - UdsServiceType::SecurityAccess => { - Self::SecurityAccess(::decode(reader)?) - } - UdsServiceType::TesterPresent => { - Self::TesterPresent(::decode(reader)?) - } - UdsServiceType::TransferData => { - Self::TransferData(::decode(reader)?) - } - UdsServiceType::WriteDataByIdentifier => { - Self::WriteDataByIdentifier( as SingleValueWireFormat>::decode(reader)?) - } - UdsServiceType::Authentication => { - return Err(Error::ServiceNotImplemented(UdsServiceType::Authentication)); - } - UdsServiceType::AccessTimingParameters => { - return Err(Error::ServiceNotImplemented( - UdsServiceType::AccessTimingParameters, - )); - } - UdsServiceType::SecuredDataTransmission => { - return Err(Error::ServiceNotImplemented( - UdsServiceType::SecuredDataTransmission, - )); - } - UdsServiceType::ResponseOnEvent => { - return Err(Error::ServiceNotImplemented( - UdsServiceType::ResponseOnEvent, - )); - } - UdsServiceType::LinkControl => { - return Err(Error::ServiceNotImplemented(UdsServiceType::LinkControl)); - } - UdsServiceType::ReadMemoryByAddress => { - return Err(Error::ServiceNotImplemented( - UdsServiceType::ReadMemoryByAddress, - )); - } - UdsServiceType::ReadScalingDataByIdentifier => { - return Err(Error::ServiceNotImplemented( - UdsServiceType::ReadScalingDataByIdentifier, - )); - } - UdsServiceType::ReadDataByIdentifierPeriodic => { - return Err(Error::ServiceNotImplemented( - UdsServiceType::ReadDataByIdentifierPeriodic, - )); - } - UdsServiceType::DynamicallyDefinedDataIdentifier => { - return Err(Error::ServiceNotImplemented( - UdsServiceType::DynamicallyDefinedDataIdentifier, - )); - } - UdsServiceType::WriteMemoryByAddress => { - return Err(Error::ServiceNotImplemented( - UdsServiceType::WriteMemoryByAddress, - )); - } - UdsServiceType::ClearDiagnosticInfo => { - return Err(Error::ServiceNotImplemented( - UdsServiceType::ClearDiagnosticInfo, - )); - } - UdsServiceType::InputOutputControlByIdentifier => { - return Err(Error::ServiceNotImplemented( - UdsServiceType::InputOutputControlByIdentifier, - )); - } - UdsServiceType::RequestUpload => { - return Err(Error::ServiceNotImplemented(UdsServiceType::RequestUpload)); - } - UdsServiceType::RequestFileTransfer => { - return Err(Error::ServiceNotImplemented( - UdsServiceType::RequestFileTransfer, - )); - } - UdsServiceType::NegativeResponse => { - return Err(Error::ServiceNotImplemented( - UdsServiceType::NegativeResponse, - )); - } - UdsServiceType::UnsupportedDiagnosticService => { - return Err(Error::ServiceNotImplemented( - UdsServiceType::UnsupportedDiagnosticService, - )); - } - }) - } -} - -// --------------------------------------------------------------------------- -// no_std RX request enum (zero-copy, no DiagnosticDefinition needed) -// --------------------------------------------------------------------------- +use super::service::UdsServiceType; /// Zero-copy RX request. Borrows from the wire buffer. /// -/// Unlike [`Request`], this enum does not require a [`DiagnosticDefinition`] -/// generic parameter — variable-length payloads are stored as raw `&'a [u8]` -/// slices. +/// Variable-length payloads are stored as raw `&'a [u8]` slices that can be +/// further parsed on demand. #[derive(Clone, Debug)] #[non_exhaustive] -pub enum RequestRx<'a> { +pub enum Request<'a> { /// Clear diagnostic information request. ClearDiagnosticInfo(ClearDiagnosticInfoRequest), /// Communication control request. @@ -513,7 +52,7 @@ pub enum RequestRx<'a> { WriteDataByIdentifier(&'a [u8]), } -impl<'a> Decode<'a> for RequestRx<'a> { +impl<'a> Decode<'a> for Request<'a> { fn decode(buf: &'a [u8]) -> Result<(Self, &'a [u8]), Error> { if buf.is_empty() { return Err(Error::InsufficientData(1)); @@ -577,7 +116,7 @@ impl<'a> Decode<'a> for RequestRx<'a> { } } -impl RequestRx<'_> { +impl Request<'_> { /// Returns the [`UdsServiceType`] corresponding to this request variant. #[must_use] pub fn service(&self) -> UdsServiceType { @@ -599,91 +138,3 @@ impl RequestRx<'_> { } } } - -#[cfg(test)] -mod tests { - use super::*; - use crate::{ - CommunicationControlType, CommunicationType, ProtocolRequest, ResetType, SecurityAccessType, - }; - - #[test] - fn test_is_positive_response_suppressed() { - let communication_control_request = ProtocolRequest::communication_control( - CommunicationControlType::EnableRxAndTx, - CommunicationType::Normal, - true, - ); - assert!(communication_control_request.is_positive_response_suppressed()); - - let control_dtc_settings_request = - ProtocolRequest::control_dtc_settings(DtcSettings::On, true); - assert!(control_dtc_settings_request.is_positive_response_suppressed()); - - let diagnostic_session_control_request = ProtocolRequest::diagnostic_session_control( - true, - DiagnosticSessionType::ProgrammingSession, - ); - assert!(diagnostic_session_control_request.is_positive_response_suppressed()); - let diagnostic_session_control_request = ProtocolRequest::diagnostic_session_control( - false, - DiagnosticSessionType::ProgrammingSession, - ); - let should_not_be_suppressed = - diagnostic_session_control_request.is_positive_response_suppressed(); - assert!(!should_not_be_suppressed); - - let ecu_reset_request = ProtocolRequest::ecu_reset(true, ResetType::HardReset); - assert!(ecu_reset_request.is_positive_response_suppressed()); - - let security_access_request = ProtocolRequest::security_access( - true, - SecurityAccessType::ISO26021_2SendKeyValues, - vec![0x01, 0x02], - ); - assert!(security_access_request.is_positive_response_suppressed()); - - let tester_present_request = ProtocolRequest::tester_present(true); - assert!(tester_present_request.is_positive_response_suppressed()); - - let clear_diagnostic_info_request = - ProtocolRequest::clear_diagnostic_info(DTCRecord::new(0x01, 0x02, 0x03), 0x01); - assert!(!clear_diagnostic_info_request.is_positive_response_suppressed()); - } - - #[test] - fn test_communication_control_sprmib_wire_bytes() { - // DisableRxAndTx with suppress=true (as used in firmware_flashing archive) - let request = ProtocolRequest::communication_control( - CommunicationControlType::DisableRxAndTx, - CommunicationType::Normal, - true, - ); - assert!(request.is_positive_response_suppressed()); - - let mut bytes = Vec::new(); - request.encode(&mut bytes).unwrap(); - // SID=0x28, sub-function=0x03|0x80=0x83, communication_type - assert_eq!(bytes[0], 0x28, "SID should be 0x28"); - assert_eq!( - bytes[1], 0x83, - "Sub-function should be 0x83 (DisableRxAndTx=0x03 | SPRMIB=0x80), got {:#04x}", - bytes[1] - ); - - // EnableRxAndTx with suppress=true - let request2 = ProtocolRequest::communication_control( - CommunicationControlType::EnableRxAndTx, - CommunicationType::Normal, - true, - ); - let mut bytes2 = Vec::new(); - request2.encode(&mut bytes2).unwrap(); - assert_eq!(bytes2[0], 0x28); - assert_eq!( - bytes2[1], 0x80, - "Sub-function should be 0x80 (EnableRxAndTx=0x00 | SPRMIB=0x80), got {:#04x}", - bytes2[1] - ); - } -} diff --git a/src/response.rs b/src/response.rs index 12400f5..daac835 100644 --- a/src/response.rs +++ b/src/response.rs @@ -1,359 +1,17 @@ use crate::{ - CommunicationControlResponse, CommunicationControlType, ControlDTCSettingsResponse, Decode, - DiagnosticDefinition, DiagnosticSessionControlResponse, DiagnosticSessionType, DtcSettings, - EcuResetResponse, Error, NegativeResponse, NegativeResponseCode, ReadDTCInfoResponse, - ReadDTCInfoResponseRx, ReadDataByIdentifierResponse, RequestDownloadResponse, - RequestDownloadResponseTx, RequestFileTransferResponse, ResetType, RoutineControlResponse, - SecurityAccessResponse, SecurityAccessResponseTx, SecurityAccessType, SingleValueWireFormat, - TesterPresentResponse, TransferDataResponse, TransferDataResponseTx, UdsServiceType, - WireFormat, WriteDataByIdentifierResponse, + CommunicationControlResponse, ControlDTCSettingsResponse, Decode, + DiagnosticSessionControlResponse, EcuResetResponse, Error, NegativeResponse, + ReadDTCInfoResponseRx, RequestDownloadResponseTx, SecurityAccessResponseTx, + TesterPresentResponse, TransferDataResponseTx, UdsServiceType, }; -use byteorder_embedded_io::io::{ReadBytesExt, WriteBytesExt}; -use std::io::{Read, Write}; -/// A raw UDS response consisting of the service type and its unparsed payload bytes. -#[deprecated(note = "use `UdsResponseRx` instead for zero-copy parsing")] -#[non_exhaustive] -pub struct UdsResponse { - /// The service this response corresponds to. - pub service: UdsServiceType, - /// The raw payload bytes following the service identifier. - pub data: Vec, -} - -/// Parsed UDS response. Each variant corresponds to a different UDS service response. -#[cfg_attr(feature = "serde", derive(serde::Deserialize, serde::Serialize))] -#[cfg_attr(feature = "utoipa", derive(utoipa::ToSchema))] -#[derive(Clone, Debug, PartialEq)] -#[non_exhaustive] -pub enum Response { - /// Response to a [`ClearDiagnosticInfoRequest`](crate::ClearDiagnosticInfoRequest) - ClearDiagnosticInfo, - /// Response to a [`CommunicationControlRequest`](crate::CommunicationControlRequest) - CommunicationControl(CommunicationControlResponse), - /// Response to a [`ControlDTCSettingsRequest`](crate::ControlDTCSettingsRequest) - ControlDTCSettings(ControlDTCSettingsResponse), - /// Response to a [`DiagnosticSessionControlRequest`](crate::DiagnosticSessionControlRequest) - DiagnosticSessionControl(DiagnosticSessionControlResponse), - /// Response to a [`EcuResetRequest`](crate::EcuResetRequest) - EcuReset(EcuResetResponse), - /// Negative response to any request - NegativeResponse(NegativeResponse), - /// Response to a [`ReadDataByIdentifierRequest`](crate::ReadDataByIdentifierRequest) - ReadDataByIdentifier(ReadDataByIdentifierResponse), - /// Response to a [`ReadDTCInfoRequest`](crate::ReadDTCInfoRequest) - ReadDTCInfo(ReadDTCInfoResponse), - /// Response to a [`RequestDownloadRequest`](crate::RequestDownloadRequest) - RequestDownload(RequestDownloadResponse), - /// Response to a [`RequestFileTransferRequest`](crate::RequestFileTransferRequest) - RequestFileTransfer(RequestFileTransferResponse), - /// Response to a `RequestTransferExit` request - RequestTransferExit, - /// Response to a [`RoutineControl` request](crate::RoutineControlRequest) - RoutineControl(RoutineControlResponse), - /// Response to a [`SecurityAccessRequest`](crate::SecurityAccessRequest) - SecurityAccess(SecurityAccessResponse), - /// Response to a [`TesterPresentRequest`](crate::TesterPresentRequest) - TesterPresent(TesterPresentResponse), - /// Response to a [`TransferDataRequest`](crate::TransferDataRequest) - TransferData(TransferDataResponse), - /// Response to a [`WriteDataByIdentifierRequest`](crate::WriteDataByIdentifierRequest) - WriteDataByIdentifier(WriteDataByIdentifierResponse), -} - -impl Response { - /// Create a `ClearDiagnosticInfo` positive response. - #[must_use] - pub fn clear_diagnostic_info() -> Self { - Response::ClearDiagnosticInfo - } - /// Create a `CommunicationControl` positive response. - #[must_use] - pub fn communication_control(control_type: CommunicationControlType) -> Self { - Response::CommunicationControl(CommunicationControlResponse::new(control_type)) - } - - /// Create a `ControlDTCSettings` positive response. - #[must_use] - pub fn control_dtc_settings(setting: DtcSettings) -> Self { - Response::ControlDTCSettings(ControlDTCSettingsResponse::new(setting)) - } - - /// Create a `DiagnosticSessionControl` positive response with timing parameters. - #[must_use] - pub fn diagnostic_session_control( - session_type: DiagnosticSessionType, - p2_max: u16, - p2_star_max: u16, - ) -> Self { - Response::DiagnosticSessionControl(DiagnosticSessionControlResponse::new( - session_type, - p2_max, - p2_star_max, - )) - } - - /// Create an `EcuReset` positive response. - #[must_use] - pub fn ecu_reset(reset_type: ResetType, power_down_time: u8) -> Self { - Response::EcuReset(EcuResetResponse::new(reset_type, power_down_time)) - } - - /// Create a negative response for the given service and response code. - #[must_use] - pub fn negative_response(request_service: UdsServiceType, nrc: NegativeResponseCode) -> Self { - Response::NegativeResponse(NegativeResponse::new(request_service, nrc)) - } - - /// Create a `ReadDataByIdentifier` positive response from an iterator of payloads. - #[must_use] - pub fn read_data_by_identifier(payload: I) -> Self - where - I: IntoIterator, - { - Response::ReadDataByIdentifier(ReadDataByIdentifierResponse::new(payload)) - } - - /// Create a `RequestDownload` positive response. - #[must_use] - pub fn request_download( - length_format_identifier: u8, - max_number_of_block_length: Vec, - ) -> Self { - Response::RequestDownload(RequestDownloadResponse::new( - length_format_identifier, - max_number_of_block_length, - )) - } - - /// Create a `RequestFileTransfer` positive response. Not yet implemented. - #[must_use] - pub fn request_file_transfer() -> Self { - todo!() - } - - /// Create a `RoutineControl` positive response. - pub fn routine_control( - routine_control_type: crate::RoutineControlSubFunction, - data: D::RoutinePayload, - ) -> Self { - Response::RoutineControl(RoutineControlResponse::new(routine_control_type, data)) - } - - /// Create a `SecurityAccess` positive response carrying the security seed. - #[must_use] - pub fn security_access(access_type: SecurityAccessType, security_seed: Vec) -> Self { - Response::SecurityAccess(SecurityAccessResponse::new(access_type, security_seed)) - } - - /// Create a `TesterPresent` positive response. - #[must_use] - pub fn tester_present() -> Self { - Response::TesterPresent(TesterPresentResponse::new()) - } - - /// Create a `TransferData` positive response. - #[must_use] - pub fn transfer_data(block_sequence_counter: u8, data: Vec) -> Self { - Response::TransferData(TransferDataResponse::new(block_sequence_counter, data)) - } - - /// Returns the [`UdsServiceType`] corresponding to this response variant. - pub fn service(&self) -> UdsServiceType { - match self { - Self::ClearDiagnosticInfo => UdsServiceType::ClearDiagnosticInfo, - Self::CommunicationControl(_) => UdsServiceType::CommunicationControl, - Self::ControlDTCSettings(_) => UdsServiceType::ControlDTCSettings, - Self::DiagnosticSessionControl(_) => UdsServiceType::DiagnosticSessionControl, - Self::EcuReset(_) => UdsServiceType::EcuReset, - Self::NegativeResponse(_) => UdsServiceType::NegativeResponse, - Self::ReadDataByIdentifier(_) => UdsServiceType::ReadDataByIdentifier, - Self::ReadDTCInfo(_) => UdsServiceType::ReadDTCInfo, - Self::RequestDownload(_) => UdsServiceType::RequestDownload, - Self::RequestFileTransfer(_) => UdsServiceType::RequestFileTransfer, - Self::RequestTransferExit => UdsServiceType::RequestTransferExit, - Self::RoutineControl(_) => UdsServiceType::RoutineControl, - Self::SecurityAccess(_) => UdsServiceType::SecurityAccess, - Self::TesterPresent(_) => UdsServiceType::TesterPresent, - Self::TransferData(_) => UdsServiceType::TransferData, - Self::WriteDataByIdentifier(_) => UdsServiceType::WriteDataByIdentifier, - } - } -} - -impl WireFormat for Response { - #[allow(clippy::match_same_arms)] - fn required_size(&self) -> usize { - 1 + match self { - Self::ClearDiagnosticInfo => 0, - Self::CommunicationControl(cc) => cc.required_size(), - Self::ControlDTCSettings(dtc) => dtc.required_size(), - Self::DiagnosticSessionControl(ds) => ds.required_size(), - Self::EcuReset(reset) => reset.required_size(), - Self::NegativeResponse(nr) => nr.required_size(), - Self::ReadDataByIdentifier(rd) => rd.required_size(), - Self::ReadDTCInfo(rd) => rd.required_size(), - Self::RequestDownload(rd) => rd.required_size(), - Self::RequestFileTransfer(rft) => rft.required_size(), - Self::RequestTransferExit => 0, - Self::RoutineControl(rc) => rc.required_size(), - Self::SecurityAccess(sa) => sa.required_size(), - Self::TesterPresent(tp) => tp.required_size(), - Self::TransferData(td) => td.required_size(), - Self::WriteDataByIdentifier(wdbi) => wdbi.required_size(), - } - } - - #[allow(clippy::match_same_arms)] - fn encode(&self, writer: &mut T) -> Result { - // Write the service byte - writer.write_u8(self.service().response_to_byte())?; - // Write the payload - Ok(1 + match self { - Self::ClearDiagnosticInfo => Ok(0), - Self::CommunicationControl(cc) => cc.encode(writer), - Self::ControlDTCSettings(dtc) => dtc.encode(writer), - Self::DiagnosticSessionControl(ds) => ds.encode(writer), - Self::EcuReset(reset) => reset.encode(writer), - Self::NegativeResponse(nr) => nr.encode(writer), - Self::ReadDataByIdentifier(rd) => rd.encode(writer), - Self::ReadDTCInfo(rd) => rd.encode(writer), - Self::RequestDownload(rd) => rd.encode(writer), - Self::RequestFileTransfer(rft) => rft.encode(writer), - Self::RequestTransferExit => Ok(0), - Self::RoutineControl(rc) => rc.encode(writer), - Self::SecurityAccess(sa) => sa.encode(writer), - Self::TesterPresent(tp) => tp.encode(writer), - Self::TransferData(td) => td.encode(writer), - Self::WriteDataByIdentifier(wdbi) => wdbi.encode(writer), - }?) - } -} - -impl SingleValueWireFormat for Response { - #[allow(clippy::too_many_lines)] - fn decode(reader: &mut T) -> Result { - let service = UdsServiceType::response_from_byte(reader.read_u8()?); - Ok(match service { - UdsServiceType::CommunicationControl => { - Self::CommunicationControl(::decode(reader)?) - } - UdsServiceType::ControlDTCSettings => { - Self::ControlDTCSettings(::decode(reader)?) - } - UdsServiceType::DiagnosticSessionControl => { - Self::DiagnosticSessionControl(::decode(reader)?) - } - UdsServiceType::EcuReset => Self::EcuReset(::decode(reader)?), - UdsServiceType::ReadDataByIdentifier => { - Self::ReadDataByIdentifier( as SingleValueWireFormat>::decode(reader)?) - } - UdsServiceType::ReadDTCInfo => Self::ReadDTCInfo( as SingleValueWireFormat>::decode(reader)?), - UdsServiceType::RequestDownload => { - Self::RequestDownload(::decode(reader)?) - } - UdsServiceType::RequestFileTransfer => { - Self::RequestFileTransfer(::decode(reader)?) - } - UdsServiceType::RequestTransferExit => Self::RequestTransferExit, - UdsServiceType::RoutineControl => { - Self::RoutineControl( as SingleValueWireFormat>::decode(reader)?) - } - UdsServiceType::SecurityAccess => { - Self::SecurityAccess(::decode(reader)?) - } - UdsServiceType::TesterPresent => { - Self::TesterPresent(::decode(reader)?) - } - UdsServiceType::NegativeResponse => { - Self::NegativeResponse(::decode(reader)?) - } - UdsServiceType::WriteDataByIdentifier => { - Self::WriteDataByIdentifier( as SingleValueWireFormat>::decode(reader)?) - } - UdsServiceType::Authentication => { - return Err(Error::ServiceNotImplemented(UdsServiceType::Authentication)); - } - UdsServiceType::AccessTimingParameters => { - return Err(Error::ServiceNotImplemented( - UdsServiceType::AccessTimingParameters, - )); - } - UdsServiceType::SecuredDataTransmission => { - return Err(Error::ServiceNotImplemented( - UdsServiceType::SecuredDataTransmission, - )); - } - UdsServiceType::ResponseOnEvent => { - return Err(Error::ServiceNotImplemented( - UdsServiceType::ResponseOnEvent, - )); - } - UdsServiceType::LinkControl => { - return Err(Error::ServiceNotImplemented(UdsServiceType::LinkControl)); - } - UdsServiceType::ReadMemoryByAddress => { - return Err(Error::ServiceNotImplemented( - UdsServiceType::ReadMemoryByAddress, - )); - } - UdsServiceType::ReadScalingDataByIdentifier => { - return Err(Error::ServiceNotImplemented( - UdsServiceType::ReadScalingDataByIdentifier, - )); - } - UdsServiceType::ReadDataByIdentifierPeriodic => { - return Err(Error::ServiceNotImplemented( - UdsServiceType::ReadDataByIdentifierPeriodic, - )); - } - UdsServiceType::DynamicallyDefinedDataIdentifier => { - return Err(Error::ServiceNotImplemented( - UdsServiceType::DynamicallyDefinedDataIdentifier, - )); - } - UdsServiceType::WriteMemoryByAddress => { - return Err(Error::ServiceNotImplemented( - UdsServiceType::WriteMemoryByAddress, - )); - } - UdsServiceType::ClearDiagnosticInfo => { - return Err(Error::ServiceNotImplemented( - UdsServiceType::ClearDiagnosticInfo, - )); - } - UdsServiceType::InputOutputControlByIdentifier => { - return Err(Error::ServiceNotImplemented( - UdsServiceType::InputOutputControlByIdentifier, - )); - } - UdsServiceType::RequestUpload => { - return Err(Error::ServiceNotImplemented(UdsServiceType::RequestUpload)); - } - UdsServiceType::TransferData => { - Self::TransferData(::decode(reader)?) - } - UdsServiceType::UnsupportedDiagnosticService => { - return Err(Error::ServiceNotImplemented( - UdsServiceType::UnsupportedDiagnosticService, - )); - } - }) - } -} - -// --------------------------------------------------------------------------- -// no_std RX response enum (zero-copy, no DiagnosticDefinition needed) -// --------------------------------------------------------------------------- - -/// Zero-copy RX response. Borrows from the wire buffer. +/// Parsed zero-copy UDS response. Borrows from the wire buffer. /// -/// Unlike [`Response`], this enum does not require a [`DiagnosticDefinition`] -/// generic parameter — variable-length payloads are stored as raw `&'a [u8]` -/// slices that can be further parsed on demand. +/// Variable-length payloads are stored as raw `&'a [u8]` slices that can be +/// further parsed on demand. #[derive(Clone, Debug)] #[non_exhaustive] -pub enum ResponseRx<'a> { +pub enum Response<'a> { /// Positive response to `ClearDiagnosticInfo`. ClearDiagnosticInfo, /// Positive response to `CommunicationControl`. @@ -391,7 +49,7 @@ pub enum ResponseRx<'a> { WriteDataByIdentifier(&'a [u8]), } -impl<'a> Decode<'a> for ResponseRx<'a> { +impl<'a> Decode<'a> for Response<'a> { fn decode(buf: &'a [u8]) -> Result<(Self, &'a [u8]), Error> { if buf.is_empty() { return Err(Error::InsufficientData(1)); @@ -461,17 +119,15 @@ impl<'a> Decode<'a> for ResponseRx<'a> { } /// Zero-copy raw RX response. Borrows from the wire buffer. -/// -/// Replaces the allocating [`UdsResponse`] for `no_std` use. #[derive(Clone, Debug)] -pub struct UdsResponseRx<'a> { +pub struct UdsResponse<'a> { /// The service this response corresponds to. pub service: UdsServiceType, /// The raw payload bytes following the service identifier. pub data: &'a [u8], } -impl<'a> Decode<'a> for UdsResponseRx<'a> { +impl<'a> Decode<'a> for UdsResponse<'a> { fn decode(buf: &'a [u8]) -> Result<(Self, &'a [u8]), Error> { if buf.is_empty() { return Err(Error::InsufficientData(1)); diff --git a/src/services/clear_dtc_information.rs b/src/services/clear_dtc_information.rs index 9df56b3..254722c 100644 --- a/src/services/clear_dtc_information.rs +++ b/src/services/clear_dtc_information.rs @@ -1,9 +1,7 @@ //! `ClearDiagnosticInformation` (0x14) service implementation use crate::{ - CLEAR_ALL_DTCS, DTCRecord, Decode, Encode, NegativeResponseCode, SingleValueWireFormat, - WireFormat, + CLEAR_ALL_DTCS, DTCRecord, Decode, Encode, NegativeResponseCode, }; -use byteorder_embedded_io::io::{ReadBytesExt, WriteBytesExt}; /// Negative response codes const CLEAR_DIAG_INFO_NEGATIVE_RESPONSE_CODES: [NegativeResponseCode; 4] = [ @@ -82,32 +80,6 @@ impl<'a> Decode<'a> for ClearDiagnosticInfoRequest { } } -impl WireFormat for ClearDiagnosticInfoRequest { - fn required_size(&self) -> usize { - self.group_of_dtc.required_size() + 1 - } - - fn encode(&self, writer: &mut T) -> Result { - let mut size = 0; - size += WireFormat::encode(&self.group_of_dtc, writer)?; - writer.write_u8(self.memory_selection)?; - size += 1; - Ok(size) - } -} - -impl SingleValueWireFormat for ClearDiagnosticInfoRequest { - fn decode(reader: &mut T) -> Result { - let group_of_dtc = ::decode(reader)?; - let memory_selection = reader.read_u8()?; - - Ok(Self { - group_of_dtc, - memory_selection, - }) - } -} - /// test #[cfg(test)] mod request { diff --git a/src/services/communication_control.rs b/src/services/communication_control.rs index 8e51222..4e0b15f 100644 --- a/src/services/communication_control.rs +++ b/src/services/communication_control.rs @@ -1,10 +1,8 @@ //! `CommunicationControl` (0x28) service implementation use crate::{ CommunicationControlType, CommunicationType, Decode, Encode, Error, NegativeResponseCode, - SingleValueWireFormat, SuppressablePositiveResponse, WireFormat, + SuppressablePositiveResponse, }; -use byteorder_embedded_io::BigEndian; -use byteorder_embedded_io::io::{ReadBytesExt, WriteBytesExt}; const COMMUNICATION_CONTROL_NEGATIVE_RESPONSE_CODES: [NegativeResponseCode; 4] = [ NegativeResponseCode::SubFunctionNotSupported, @@ -136,47 +134,6 @@ impl<'a> Decode<'a> for CommunicationControlRequest { } } -impl WireFormat for CommunicationControlRequest { - fn required_size(&self) -> usize { - if self.node_id.is_some() { 4 } else { 2 } - } - - fn encode(&self, writer: &mut T) -> Result { - writer.write_u8(u8::from(self.control_type))?; - writer.write_u8(u8::from(self.communication_type))?; - if let Some(id) = self.node_id { - writer.write_u16::(id)?; - Ok(4) - } else { - Ok(2) - } - } -} - -impl SingleValueWireFormat for CommunicationControlRequest { - fn decode(reader: &mut T) -> Result { - let enable_byte = reader.read_u8()?; - let communication_enable = SuppressablePositiveResponse::try_from(enable_byte)?; - let communication_type = CommunicationType::try_from(reader.read_u8()?)?; - match communication_enable.value() { - CommunicationControlType::EnableRxAndDisableTxWithEnhancedAddressInfo - | CommunicationControlType::EnableRxAndTxWithEnhancedAddressInfo => { - let node_id = Some(reader.read_u16::()?); - Ok(Self { - control_type: communication_enable, - communication_type, - node_id, - }) - } - _ => Ok(Self { - control_type: communication_enable, - communication_type, - node_id: None, - }), - } - } -} - /// Positive response from the server to change communication behavior #[cfg_attr(feature = "serde", derive(serde::Deserialize, serde::Serialize))] #[cfg_attr(feature = "utoipa", derive(utoipa::ToSchema))] @@ -216,24 +173,6 @@ impl<'a> Decode<'a> for CommunicationControlResponse { } } -impl WireFormat for CommunicationControlResponse { - fn required_size(&self) -> usize { - 1 - } - - fn encode(&self, writer: &mut T) -> Result { - writer.write_u8(u8::from(self.control_type))?; - Ok(1) - } -} - -impl SingleValueWireFormat for CommunicationControlResponse { - fn decode(reader: &mut T) -> Result { - let control_type = CommunicationControlType::try_from(reader.read_u8()?)?; - Ok(Self::new(control_type)) - } -} - #[cfg(test)] mod request { use super::*; diff --git a/src/services/control_dtc_settings.rs b/src/services/control_dtc_settings.rs index 38b3349..ef98c23 100644 --- a/src/services/control_dtc_settings.rs +++ b/src/services/control_dtc_settings.rs @@ -1,6 +1,5 @@ //! `ControlDTCSetting` (0x85) service implementation -use crate::{Decode, DtcSettings, Encode, Error, SUCCESS, SingleValueWireFormat, WireFormat}; -use byteorder_embedded_io::io::{ReadBytesExt, WriteBytesExt}; +use crate::{Decode, DtcSettings, Encode, Error, SUCCESS}; /// The `ControlDTCSettings` service is used to control the DTC settings of the ECU. #[cfg_attr(feature = "serde", derive(serde::Deserialize, serde::Serialize))] @@ -58,35 +57,6 @@ impl<'a> Decode<'a> for ControlDTCSettingsRequest { } } -impl WireFormat for ControlDTCSettingsRequest { - fn required_size(&self) -> usize { - 1 - } - - fn encode(&self, writer: &mut T) -> Result { - let request_byte = - u8::from(self.setting) | if self.suppress_response { SUCCESS } else { 0 }; - writer.write_u8(request_byte)?; - Ok(1) - } - - fn is_positive_response_suppressed(&self) -> bool { - self.suppress_response - } -} - -impl SingleValueWireFormat for ControlDTCSettingsRequest { - fn decode(reader: &mut T) -> Result { - let request_byte = reader.read_u8()?; - let setting = DtcSettings::try_from(request_byte & !SUCCESS)?; - let suppress_response = request_byte & SUCCESS != 0; - Ok(Self { - setting, - suppress_response, - }) - } -} - /// Positive response to a `ControlDTCSettingsRequest` /// /// The ECU will respond with a `ControlDTCSettingsResponse` if the request was successful. @@ -128,24 +98,6 @@ impl<'a> Decode<'a> for ControlDTCSettingsResponse { } } -impl WireFormat for ControlDTCSettingsResponse { - fn required_size(&self) -> usize { - 1 - } - - fn encode(&self, writer: &mut T) -> Result { - writer.write_u8(u8::from(self.setting))?; - Ok(1) - } -} - -impl SingleValueWireFormat for ControlDTCSettingsResponse { - fn decode(reader: &mut T) -> Result { - let setting = DtcSettings::try_from(reader.read_u8()?)?; - Ok(Self { setting }) - } -} - #[cfg(test)] mod request { use super::*; diff --git a/src/services/diagnostic_session_control.rs b/src/services/diagnostic_session_control.rs index 422b7f9..fe4c02d 100644 --- a/src/services/diagnostic_session_control.rs +++ b/src/services/diagnostic_session_control.rs @@ -10,10 +10,8 @@ //! as well as in other operation conditions defined by the vehicle manufacturer (e.g. limp home operation condition). use crate::{ - Decode, DiagnosticSessionType, Encode, Error, NegativeResponseCode, SingleValueWireFormat, - SuppressablePositiveResponse, WireFormat, + Decode, DiagnosticSessionType, Encode, Error, NegativeResponseCode, SuppressablePositiveResponse, }; -use byteorder_embedded_io::io::{ReadBytesExt, WriteBytesExt}; const DIAGNOSTIC_SESSION_CONTROL_NEGATIVE_RESPONSE_CODES: [NegativeResponseCode; 3] = [ NegativeResponseCode::SubFunctionNotSupported, @@ -88,28 +86,6 @@ impl<'a> Decode<'a> for DiagnosticSessionControlRequest { } } -impl WireFormat for DiagnosticSessionControlRequest { - fn required_size(&self) -> usize { - 1 - } - - fn encode(&self, writer: &mut T) -> Result { - writer.write_u8(u8::from(self.session_type))?; - Ok(1) - } - - fn is_positive_response_suppressed(&self) -> bool { - self.suppress_positive_response() - } -} - -impl SingleValueWireFormat for DiagnosticSessionControlRequest { - fn decode(reader: &mut T) -> Result { - let session_type = SuppressablePositiveResponse::try_from(reader.read_u8()?)?; - Ok(Self { session_type }) - } -} - /// Positive response to a `DiagnosticSessionControlRequest` #[cfg_attr(feature = "serde", derive(serde::Deserialize, serde::Serialize))] #[cfg_attr(feature = "utoipa", derive(utoipa::ToSchema))] @@ -176,33 +152,6 @@ impl<'a> Decode<'a> for DiagnosticSessionControlResponse { } } -impl WireFormat for DiagnosticSessionControlResponse { - fn required_size(&self) -> usize { - 5 - } - - fn encode(&self, buffer: &mut T) -> Result { - buffer.write_u8(u8::from(self.session_type))?; - buffer.write_u16::(self.p2_server_max)?; - buffer.write_u16::(self.p2_star_server_max)?; - - Ok(5) - } -} - -impl SingleValueWireFormat for DiagnosticSessionControlResponse { - fn decode(reader: &mut T) -> Result { - let session_type = DiagnosticSessionType::try_from(reader.read_u8()?)?; - let p2_server_max = reader.read_u16::()?; - let p2_star_server_max = reader.read_u16::()?; - Ok(Self { - session_type, - p2_server_max, - p2_star_server_max, - }) - } -} - #[cfg(test)] mod request { use super::*; diff --git a/src/services/ecu_reset.rs b/src/services/ecu_reset.rs index 48f75c8..797f941 100644 --- a/src/services/ecu_reset.rs +++ b/src/services/ecu_reset.rs @@ -1,10 +1,7 @@ //! `ECUReset` (0x11) service implementation use crate::{ - Decode, Encode, Error, NegativeResponseCode, ResetType, SingleValueWireFormat, - SuppressablePositiveResponse, WireFormat, + Decode, Encode, Error, NegativeResponseCode, ResetType, SuppressablePositiveResponse, }; -use byteorder_embedded_io::io::{ReadBytesExt, WriteBytesExt}; -use std::io::{Read, Write}; const ECU_RESET_NEGATIVE_RESPONSE_CODES: [NegativeResponseCode; 4] = [ NegativeResponseCode::SubFunctionNotSupported, @@ -75,28 +72,6 @@ impl<'a> Decode<'a> for EcuResetRequest { } } -impl WireFormat for EcuResetRequest { - fn required_size(&self) -> usize { - 1 - } - - fn encode(&self, writer: &mut T) -> Result { - writer.write_u8(u8::from(self.reset_type))?; - Ok(1) - } - - fn is_positive_response_suppressed(&self) -> bool { - self.suppress_positive_response() - } -} - -impl SingleValueWireFormat for EcuResetRequest { - fn decode(reader: &mut T) -> Result { - let reset_type = SuppressablePositiveResponse::try_from(reader.read_u8()?)?; - Ok(Self { reset_type }) - } -} - /// Positive response to an `EcuResetRequest` #[cfg_attr(feature = "serde", derive(serde::Deserialize, serde::Serialize))] #[cfg_attr(feature = "utoipa", derive(utoipa::ToSchema))] @@ -151,31 +126,6 @@ impl<'a> Decode<'a> for EcuResetResponse { } } -impl WireFormat for EcuResetResponse { - fn required_size(&self) -> usize { - 2 - } - - fn encode(&self, buffer: &mut T) -> Result { - buffer.write_u8(u8::from(self.reset_type))?; - buffer.write_u8(self.power_down_time)?; - Ok(2) - } -} - -impl SingleValueWireFormat for EcuResetResponse { - fn decode(reader: &mut T) -> Result { - let reset_type = ResetType::try_from(reader.read_u8()?)?; - // powerDownTime is conditional per ISO 14229-1 — only present when - // the server needs to report how long until power-down. - let power_down_time = reader.read_u8().unwrap_or(0); - Ok(Self { - reset_type, - power_down_time, - }) - } -} - #[cfg(test)] mod request { use super::*; diff --git a/src/services/mod.rs b/src/services/mod.rs index c2e4f7a..21d6934 100644 --- a/src/services/mod.rs +++ b/src/services/mod.rs @@ -26,7 +26,7 @@ pub use read_data_by_identifier::{ mod read_dtc_information; pub use read_dtc_information::{ DtcAndStatusIter, DtcFaultDetectionIter, DtcSeverityAndStatusIter, ReadDTCInfoRequest, - ReadDTCInfoResponse, ReadDTCInfoResponseRx, ReadDTCInfoSubFunction, + ReadDTCInfoResponseRx, ReadDTCInfoSubFunction, }; mod request_download; diff --git a/src/services/negative_response.rs b/src/services/negative_response.rs index 69cdad6..f3f903c 100644 --- a/src/services/negative_response.rs +++ b/src/services/negative_response.rs @@ -1,8 +1,7 @@ //! `NegativeResponse` (0x7F) service implementation use crate::{ - Decode, Encode, Error, NegativeResponseCode, SingleValueWireFormat, UdsServiceType, WireFormat, + Decode, Encode, Error, NegativeResponseCode, UdsServiceType, }; -use byteorder_embedded_io::io::{ReadBytesExt, WriteBytesExt}; /// A negative response from the server indicating a request could not be fulfilled #[cfg_attr(feature = "serde", derive(serde::Deserialize, serde::Serialize))] @@ -53,25 +52,3 @@ impl<'a> Decode<'a> for NegativeResponse { } } -impl WireFormat for NegativeResponse { - fn required_size(&self) -> usize { - 2 - } - - fn encode(&self, writer: &mut T) -> Result { - writer.write_u8(self.request_service.request_service_to_byte())?; - writer.write_u8(u8::from(self.nrc))?; - Ok(2) - } -} - -impl SingleValueWireFormat for NegativeResponse { - fn decode(reader: &mut T) -> Result { - let request_service = UdsServiceType::service_from_request_byte(reader.read_u8()?); - let nrc = NegativeResponseCode::from(reader.read_u8()?); - Ok(Self { - request_service, - nrc, - }) - } -} diff --git a/src/services/read_data_by_identifier.rs b/src/services/read_data_by_identifier.rs index 473895a..2336dd0 100644 --- a/src/services/read_data_by_identifier.rs +++ b/src/services/read_data_by_identifier.rs @@ -1,7 +1,6 @@ //! `ReadDataByIdentifier` (0x22) service implementation use crate::{ - Encode, Error, Identifier, IterableWireFormat, NegativeResponseCode, - SingleValueWireFormat, WireFormat, + Encode, Error, Identifier, NegativeResponseCode, }; const READ_DID_NEGATIVE_RESPONSE_CODES: [NegativeResponseCode; 5] = [ @@ -39,31 +38,16 @@ impl ReadDataByIdentifierRequest { } } -impl WireFormat for ReadDataByIdentifierRequest { - fn required_size(&self) -> usize { +impl Encode for ReadDataByIdentifierRequest { + fn encoded_size(&self) -> usize { self.dids.len() * 2 } - fn encode(&self, writer: &mut W) -> Result { - let mut count = 0; + fn encode(&self, writer: &mut impl embedded_io::Write) -> Result { for did in &self.dids { - WireFormat::encode(did, writer)?; - count += 2; - } - Ok(count) - } -} - -impl SingleValueWireFormat - for ReadDataByIdentifierRequest -{ - fn decode(reader: &mut R) -> Result { - let dids = DataIdentifier::parse_from_list(reader)?; - if dids.is_empty() { - Err(Error::NoDataAvailable) - } else { - Ok(ReadDataByIdentifierRequest::new(dids)) + Encode::encode(did, writer)?; } + Ok(self.encoded_size()) } } @@ -87,40 +71,17 @@ impl ReadDataByIdentifierResponse { } } -impl WireFormat for ReadDataByIdentifierResponse { - fn required_size(&self) -> usize { - self.data.iter().map(WireFormat::required_size).sum() - } - - fn encode(&self, writer: &mut W) -> Result { - let mut total_written = 0; - for payload in &self.data { - total_written += payload.encode(writer)?; - } - Ok(total_written) +impl Encode for ReadDataByIdentifierResponse { + fn encoded_size(&self) -> usize { + self.data.iter().map(Encode::encoded_size).sum() } -} -impl SingleValueWireFormat - for ReadDataByIdentifierResponse -{ - fn decode(reader: &mut R) -> Result { - let mut data = Vec::new(); - for payload in UserPayload::decode_iter(reader) { - match payload { - Ok(p) => { - data.push(p); - } - Err(e) => { - return Err(e); - } - } - } - if data.is_empty() { - Err(Error::NoDataAvailable) - } else { - Ok(ReadDataByIdentifierResponse::new(data)) + fn encode(&self, writer: &mut impl embedded_io::Write) -> Result { + let mut total = 0; + for item in &self.data { + total += Encode::encode(item, writer)?; } + Ok(total) } } @@ -156,8 +117,10 @@ impl Encode for ReadDataByIdentifierRequestTx<'_, Da } } -impl std::fmt::Debug for ReadDataByIdentifierResponse { - fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result { +impl core::fmt::Debug + for ReadDataByIdentifierResponse +{ + fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result { write!(f, "ReadDataByIdentifierResponse\n{:?}", self.data) } } @@ -167,368 +130,27 @@ mod test { use super::*; use crate::{ProtocolIdentifier, UDSIdentifier}; - mod request { - use super::*; - - struct ReadRequestTestData { - pub test_name: String, - pub dids_bytes: Vec, - } - - impl ReadRequestTestData { - // Creates a Test Read Request from a list of data identifiers - fn from_ids(test_name: &str, dids: &[ProtocolIdentifier]) -> Self { - let dids_bytes = to_bytes(dids); - Self { - test_name: test_name.to_string(), - dids_bytes, - } - } - - // Create a Test Read Request from a list of bytes. - // Note: These bytes may not properly translate to a list of data identifiers - fn from_bytes(test_name: &str, dids_bytes: Vec) -> Self { - Self { - test_name: test_name.to_string(), - dids_bytes, - } - } - } - - // Holds a list of dids that will be transformed into a byte sequence - struct WriteRequestTestData { - pub test_name: String, - pub dids: Vec, - } - - impl WriteRequestTestData { - fn from_ids(test_name: &str, dids: &[ProtocolIdentifier]) -> Self { - Self { - test_name: test_name.to_string(), - dids: dids.to_vec(), - } - } - } - - fn to_bytes(ids: &[ProtocolIdentifier]) -> Vec { - ids.iter() - .flat_map(|id: &ProtocolIdentifier| { - let mut buffer = Vec::new(); - WireFormat::encode(id, &mut buffer).unwrap(); - buffer - }) - .collect() - } - - fn get_test_ids() -> Vec { - vec![ - ProtocolIdentifier::new(UDSIdentifier::BootSoftwareIdentification), - ProtocolIdentifier::new(UDSIdentifier::ApplicationSoftwareIdentification), - ProtocolIdentifier::new(UDSIdentifier::ApplicationDataIdentification), - ProtocolIdentifier::new(UDSIdentifier::BootSoftwareFingerprint), - ProtocolIdentifier::new(UDSIdentifier::ApplicationSoftwareFingerprint), - ProtocolIdentifier::new(UDSIdentifier::ApplicationDataFingerprint), - ProtocolIdentifier::new(UDSIdentifier::ActiveDiagnosticSession), - ProtocolIdentifier::new(UDSIdentifier::VehicleManufacturerSparePartNumber), - ProtocolIdentifier::new(UDSIdentifier::VehicleManufacturerECUSoftwareNumber), - ProtocolIdentifier::new(UDSIdentifier::VehicleManufacturerECUSoftwareVersionNumber), - ] - } - - #[test] - fn read_did_request_bytes() { - let test_ids = get_test_ids(); - - let test_data_sets: Vec = vec![ - ReadRequestTestData::from_bytes("No ids", vec![]), - ReadRequestTestData::from_bytes("Invalid byte length", vec![0x00]), - ReadRequestTestData::from_bytes("Invalid id", vec![0x00, 0x01]), - ReadRequestTestData::from_ids("1 id", &test_ids[0..1]), - ReadRequestTestData::from_ids("2 ids", &test_ids[0..2]), - ReadRequestTestData::from_ids("3 ids", &test_ids[0..3]), - ReadRequestTestData::from_ids("4 ids", &test_ids[0..4]), - ReadRequestTestData::from_ids("All ids", &test_ids), - ReadRequestTestData::from_ids( - "Repeated ids", - &test_ids - .clone() - .iter() - .cycle() - .take(100) - .copied() - .collect::>(), - ), - ]; - - for test_data in &test_data_sets { - let read_result = ReadDataByIdentifierRequest::::decode( - &mut test_data.dids_bytes.as_slice(), - ); - - match read_result { - Ok(response) => { - let mut translated_bytes = Vec::new(); - response.encode(&mut translated_bytes).unwrap(); - assert_eq!( - translated_bytes, *test_data.dids_bytes, - "Ok: Failed: {}", - test_data.test_name - ); - } - Err(e) => { - if test_data.dids_bytes.is_empty() { - assert!( - matches!(e, Error::NoDataAvailable), - "NoDataAvailable: Failed {}", - test_data.test_name - ); - } else { - assert!( - matches!(e, Error::IncorrectMessageLengthOrInvalidFormat), - "IncorrectMessageLengthOrInvalidFormat: Failed {}", - test_data.test_name - ); - } - } - } - } - } - - #[test] - fn write_did_request_bytes() { - let test_ids = get_test_ids(); - - let test_data_sets: Vec = vec![ - WriteRequestTestData::from_ids("No ids", &Vec::new()), - WriteRequestTestData::from_ids("1 id", &test_ids[0..1]), - WriteRequestTestData::from_ids("2 ids", &test_ids[0..2]), - WriteRequestTestData::from_ids("3 ids", &test_ids[0..3]), - WriteRequestTestData::from_ids("4 ids", &test_ids[0..4]), - WriteRequestTestData::from_ids("All ids", &test_ids), - WriteRequestTestData::from_ids( - "Repeated ids", - &test_ids - .clone() - .iter() - .cycle() - .take(100) - .copied() - .collect::>(), - ), - ]; - - for test_data in &test_data_sets { - let request = ReadDataByIdentifierRequest::new(test_data.dids.clone()); - let mut buffer = Vec::new(); - let write_result = request.encode(&mut buffer); - - match write_result { - Ok(bytes_read) => { - // 1 did is 2 bytes - let expected_byte_count = request.dids.len() * 2; - assert_eq!(bytes_read, expected_byte_count); - } - Err(e) => { - assert!( - matches!(e, Error::InsufficientData(_)), - "InsufficientData: Failed {}", - test_data.test_name - ); - } - } - } - } + #[test] + fn encode_read_did_request_tx() { + let ids = [ + ProtocolIdentifier::new(UDSIdentifier::BootSoftwareIdentification), + ProtocolIdentifier::new(UDSIdentifier::ActiveDiagnosticSession), + ]; + let req = ReadDataByIdentifierRequestTx::new(&ids); + let mut buf = [0u8; 16]; + let written = Encode::encode(&req, &mut buf.as_mut_slice()).unwrap(); + assert_eq!(written, 4); // 2 DIDs * 2 bytes each } - mod response { - use super::*; - - #[cfg_attr(feature = "serde", derive(serde::Deserialize, serde::Serialize))] - #[derive(Clone, Copy, Debug, Eq, PartialEq)] - pub struct BazData { - pub data: [u8; 16], - pub data2: u64, - pub data3: u16, - } - - // The UDSIdentifiers are vender defined and don't have interesting payloads, so we define our own types for - #[cfg_attr(feature = "serde", derive(serde::Deserialize, serde::Serialize))] - #[derive(Clone, Debug, Eq, PartialEq)] - pub enum TestPayload { - #[cfg_attr(feature = "serde", serde(with = "serde_bytes"))] - MeaningOfLife([u8; 42]), - Foo(u32), - Bar, - Baz(BazData), - UDSIdentifier(UDSIdentifier), - } - - impl TestPayload { - fn new(did: u16, reader: &mut R) -> Result { - match did { - 0xFF00 => { - let mut data = [0u8; 42]; - reader.read_exact(&mut data)?; - Ok(TestPayload::MeaningOfLife(data)) - } - 0xFF01 => { - let mut data = [0u8; 4]; - reader.read_exact(&mut data)?; - let value = u32::from_be_bytes(data); - Ok(TestPayload::Foo(value)) - } - 0xFF02 => Ok(TestPayload::Bar), - 0xFF03 => { - let data = BazData::decode(reader)?; - Ok(TestPayload::Baz(data)) - } - _ => { - let identifier = UDSIdentifier::try_from(did)?; - Ok(TestPayload::UDSIdentifier(identifier)) - } - } - } - } - - impl From for u16 { - fn from(value: TestPayload) -> Self { - match value { - TestPayload::MeaningOfLife(_) => 0xFF00, - TestPayload::Foo(_) => 0xFF01, - TestPayload::Bar => 0xFF02, - TestPayload::Baz(_) => 0xFF03, - TestPayload::UDSIdentifier(uds_id) => u16::from(uds_id), - } - } - } - - impl WireFormat for TestPayload { - #[allow(clippy::match_same_arms)] - fn required_size(&self) -> usize { - match self { - TestPayload::MeaningOfLife(_) => 42, - TestPayload::Foo(_) => 4, - TestPayload::Bar => 0, - TestPayload::Baz(_) => 26, - TestPayload::UDSIdentifier(_) => 0, - } - } - - #[allow(clippy::match_same_arms)] - fn encode(&self, writer: &mut W) -> Result { - let id_bytes = u16::from(self.clone()).to_be_bytes(); - let did_len = writer.write(&id_bytes)?; - match self { - TestPayload::MeaningOfLife(data) => { - writer.write_all(data)?; - Ok(did_len + data.len()) - } - TestPayload::Foo(value) => { - let bytes = value.to_be_bytes(); - writer.write_all(&bytes)?; - Ok(did_len + bytes.len()) - } - TestPayload::Bar => Ok(did_len), - TestPayload::Baz(data) => data.encode(writer), - TestPayload::UDSIdentifier(_) => Ok(did_len), - } - } - } - - impl IterableWireFormat for TestPayload { - fn decode_next(reader: &mut R) -> Result, Error> { - let mut identifier_data: [u8; 2] = [0; 2]; - match reader.read(&mut identifier_data)? { - 0 => return Ok(None), - 1 => return Err(Error::IncorrectMessageLengthOrInvalidFormat), - 2 => (), - _ => unreachable!("Impossible to read more than 2 bytes into 2 byte array"), - } - let did = u16::from_be_bytes(identifier_data); - Ok(Some(TestPayload::new(did, reader)?)) - } - } - - impl WireFormat for BazData { - fn required_size(&self) -> usize { - 26 - } - - fn encode(&self, writer: &mut W) -> Result { - writer.write_all(&self.data)?; - let mut count = 16; - count += writer.write(&self.data2.to_be_bytes())?; - count += writer.write(&self.data3.to_be_bytes())?; - // 2 for the initial did bytes - Ok(2 + count) - } - } - - impl SingleValueWireFormat for BazData { - fn decode(reader: &mut R) -> Result { - let mut data = [0u8; 16]; - reader.read_exact(&mut data)?; - - let mut data2_bytes = [0u8; 8]; - reader.read_exact(&mut data2_bytes)?; - let data2 = u64::from_be_bytes(data2_bytes); - - let mut data3_bytes = [0u8; 2]; - reader.read_exact(&mut data3_bytes)?; - let data3 = u16::from_be_bytes(data3_bytes); - - Ok(BazData { data, data2, data3 }) - } - } - - fn get_test_response_data() -> Vec { - vec![ - TestPayload::MeaningOfLife([0; 42]), - TestPayload::Foo(42), - TestPayload::Bar, - TestPayload::Baz(BazData { - data: [5; 16], - data2: 1_234_567_890, - data3: 54_321, - }), - TestPayload::UDSIdentifier(UDSIdentifier::BootSoftwareIdentification), - ] - } - - #[test] - fn read_did_response_bytes() { - let test_data = get_test_response_data(); - - let response = ReadDataByIdentifierResponse::new(test_data); - let mut buffer = Vec::new(); - response.encode(&mut buffer).unwrap(); - - let read_response: ReadDataByIdentifierResponse = - ReadDataByIdentifierResponse::::decode(&mut buffer.as_slice()) - .unwrap(); - - assert_eq!(response, read_response); - } - - #[test] - fn write_did_response_bytes() { - let test_data = get_test_response_data(); - - let response = ReadDataByIdentifierResponse::new(test_data.clone()); - let mut buffer = Vec::new(); - let bytes_written = response.encode(&mut buffer).unwrap(); - - let expected_bytes: Vec = test_data - .iter() - .flat_map(|payload| { - let mut buf = Vec::new(); - payload.encode(&mut buf).unwrap(); - buf - }) - .collect(); - - assert_eq!(buffer, expected_bytes); - assert_eq!(bytes_written, expected_bytes.len()); - } + #[test] + fn encode_read_did_request_alloc() { + let ids = vec![ + ProtocolIdentifier::new(UDSIdentifier::BootSoftwareIdentification), + ProtocolIdentifier::new(UDSIdentifier::ActiveDiagnosticSession), + ]; + let req = ReadDataByIdentifierRequest::new(ids); + let mut buf = [0u8; 16]; + let written = Encode::encode(&req, &mut buf.as_mut_slice()).unwrap(); + assert_eq!(written, 4); } } diff --git a/src/services/read_dtc_information.rs b/src/services/read_dtc_information.rs index e8908b8..02977f8 100644 --- a/src/services/read_dtc_information.rs +++ b/src/services/read_dtc_information.rs @@ -1,11 +1,9 @@ //! `ReadDTCInformation` (0x19) request and response service implementation -use byteorder_embedded_io::io::{ReadBytesExt, WriteBytesExt}; use crate::{ - DTCExtDataRecordList, DTCExtDataRecordNumber, DTCFormatIdentifier, DTCRecord, DTCSeverityMask, - DTCSeverityRecord, DTCSnapshotRecord, DTCSnapshotRecordList, DTCSnapshotRecordNumber, + DTCExtDataRecordNumber, DTCFormatIdentifier, DTCRecord, DTCSeverityMask, + DTCSnapshotRecordNumber, DTCStatusMask, DTCStoredDataRecordNumber, Decode, Error, FunctionalGroupIdentifier, - IterableWireFormat, SingleValueWireFormat, WireFormat, }; /// Used for non-emissions related servers @@ -29,24 +27,6 @@ impl ReadDTCInfoRequest { } } -impl WireFormat for ReadDTCInfoRequest { - fn required_size(&self) -> usize { - self.dtc_subfunction.required_size() - } - - fn encode(&self, writer: &mut T) -> Result { - self.dtc_subfunction.encode(writer) - } -} - -impl SingleValueWireFormat for ReadDTCInfoRequest { - fn decode(reader: &mut T) -> Result { - let dtc_subfunction = ReadDTCInfoSubFunction::decode(reader)?; - - Ok(Self { dtc_subfunction }) - } -} - /// A DTC paired with its fault detection counter value #[cfg_attr(feature = "serde", derive(serde::Deserialize, serde::Serialize))] #[cfg_attr(feature = "utoipa", derive(utoipa::ToSchema))] @@ -56,173 +36,6 @@ pub struct DTCFaultDetectionCounterRecord { pub dtc_fault_detection_counter: DTCFaultDetectionCounter, } -impl WireFormat for DTCFaultDetectionCounterRecord { - fn required_size(&self) -> usize { - 4 - } - - fn encode(&self, writer: &mut T) -> Result { - self.dtc_record.encode(writer)?; - writer.write_u8(self.dtc_fault_detection_counter)?; - Ok(self.required_size()) - } -} - -impl IterableWireFormat for DTCFaultDetectionCounterRecord { - #[allow(clippy::match_same_arms)] - fn decode_next(reader: &mut T) -> Result, Error> { - let dtc_record = match DTCRecord::decode_next(reader) { - Ok(None) => return Ok(None), - Ok(Some(record)) => record, - Err(_) => return Ok(None), - }; - let dtc_fault_detection_counter = reader.read_u8()?; - Ok(Some(Self { - dtc_record, - dtc_fault_detection_counter, - })) - } -} - -/// Record containing user-defined memory DTC information filtered by status mask -#[cfg_attr(feature = "serde", derive(serde::Deserialize, serde::Serialize))] -#[cfg_attr(feature = "utoipa", derive(utoipa::ToSchema))] -#[derive(Clone, Debug, PartialEq)] -pub struct UserDefMemoryDTCByStatusMaskRecord { - // This parameter shall be used to address the respective user defined DTC memory when retrieving DTCs. - pub memory_selection: MemorySelection, - /// The status mask of the DTC, representing its current state. - pub status_availability_mask: DTCStatusMask, - /// Vector of DTC Records and Status of Corresponding DTC - pub record_data: Vec<(DTCRecord, DTCStatusMask)>, -} - -/// Record containing user-defined memory DTC snapshot data for a specific DTC -#[cfg_attr(feature = "serde", derive(serde::Deserialize, serde::Serialize))] -#[cfg_attr(feature = "utoipa", derive(utoipa::ToSchema))] -#[derive(Clone, Debug, PartialEq)] -pub struct UserDefMemoryDTCSnapshotRecordByDTCNumRecord { - // This parameter shall be used to address the respective user defined DTC memory when retrieving DTCs. - pub memory_selection: MemorySelection, - pub dtc_record: DTCRecord, - pub dtc_status_mask: DTCStatusMask, - /// Contains a snapshot of data values from the time of the system malfunction occurrence. - pub dtc_snapshot_record: Vec<(DTCSnapshotRecordNumber, DTCSnapshotRecord)>, -} -impl WireFormat - for UserDefMemoryDTCSnapshotRecordByDTCNumRecord -{ - fn required_size(&self) -> usize { - 1 + self.dtc_record.required_size() - + self.dtc_status_mask.required_size() - + self - .dtc_snapshot_record - .iter() - .fold(0, |acc, (record_number, record)| { - acc + record_number.required_size() + record.required_size() - }) - } - - fn encode(&self, writer: &mut T) -> Result { - writer.write_u8(self.memory_selection)?; - self.dtc_record.encode(writer)?; - self.dtc_status_mask.encode(writer)?; - for (record_number, record) in &self.dtc_snapshot_record { - record_number.encode(writer)?; - record.encode(writer)?; - } - Ok(self.required_size()) - } -} - -impl SingleValueWireFormat - for UserDefMemoryDTCSnapshotRecordByDTCNumRecord -{ - fn decode(reader: &mut T) -> Result { - let memory_selection = reader.read_u8()?; - let dtc_record = ::decode(reader)?; - let dtc_status_mask = DTCStatusMask::decode(reader)?; - let mut dtc_snapshot_record = Vec::new(); - - while let Ok(Some(dtc_snapshot_record_number)) = - DTCSnapshotRecordNumber::decode_next(reader) - { - let snapshot_record = DTCSnapshotRecord::decode(reader)?; - dtc_snapshot_record.push((dtc_snapshot_record_number, snapshot_record)); - } - - Ok(UserDefMemoryDTCSnapshotRecordByDTCNumRecord { - memory_selection, - dtc_record, - dtc_status_mask, - dtc_snapshot_record, - }) - } -} - -/// List of WWH OBD DTCs and corresponding status and severity information matching a client defined status mask and severity mask record -#[cfg_attr(feature = "serde", derive(serde::Deserialize, serde::Serialize))] -#[cfg_attr(feature = "utoipa", derive(utoipa::ToSchema))] -#[derive(Clone, Debug, PartialEq)] -pub struct WWHOBDDTCByMaskRecord { - /// Echo from the request. - pub functional_group_identifier: FunctionalGroupIdentifier, - /// Same representation as [`DTCStatusMask`] but with the bits 'on' representing the DTC status supported by the server - pub status_availability_mask: DTCStatusAvailabilityMask, - pub severity_availability_mask: DTCSeverityMask, - /// Specifies the format of the DTC reported by the server. - /// Only possible options: - /// `DTCFormatIdentifier::SAE_J2012_DA_DTCFormat_04` - /// `DTCFormatIdentifier::SAE_J1939_73_DTCFormat` - pub format_identifier: DTCFormatIdentifier, - pub record_data: Vec<(DTCSeverityMask, DTCRecord, DTCStatusMask)>, -} - -/// List of WWH OBD DTCs with "permanent DTC" status as described in 3.12 -#[cfg_attr(feature = "serde", derive(serde::Deserialize, serde::Serialize))] -#[cfg_attr(feature = "utoipa", derive(utoipa::ToSchema))] -#[derive(Clone, Debug, PartialEq)] -pub struct WWHOBDDTCWithPermanentStatusRecord { - /// Echo from the request. - pub functional_group_identifier: FunctionalGroupIdentifier, - /// Same representation as [`DTCStatusMask`] but with the bits 'on' representing the DTC status supported by the server - pub status_availability_mask: DTCStatusAvailabilityMask, - /// Specifies the format of the DTC reported by the server. - /// Only possible options: - /// `DTCFormatIdentifier::SAE_J2012_DA_DTCFormat_04` - /// `DTCFormatIdentifier::SAE_J1939_73_DTCFormat` - pub format_identifier: DTCFormatIdentifier, - pub record_data: Vec<(DTCRecord, DTCStatusMask)>, -} - -/// List of OBD DTCs which matches the `DTCReadiness` Group Identifier -#[cfg_attr(feature = "serde", derive(serde::Deserialize, serde::Serialize))] -#[cfg_attr(feature = "utoipa", derive(utoipa::ToSchema))] -#[derive(Clone, Debug, PartialEq)] -pub struct DTCByReadinessGroupIdentifierRecord { - /// Echo from the request. - pub functional_group_identifier: FunctionalGroupIdentifier, - /// Same representation as [`DTCStatusMask`] but with the bits 'on' representing the DTC status supported by the server - pub status_availability_mask: DTCStatusAvailabilityMask, - /// Specifies the format of the DTC reported by the server. - pub format_identifier: DTCFormatIdentifier, - /// DTC readiness groups - pub readiness_group_identifier: DTCReadinessGroupIdentifier, - pub record_data: Vec<(DTCRecord, DTCStatusMask)>, -} - -/// List of DTCs that support a specific extended data record number -#[cfg_attr(feature = "serde", derive(serde::Deserialize, serde::Serialize))] -#[cfg_attr(feature = "utoipa", derive(utoipa::ToSchema))] -#[derive(Clone, Debug, PartialEq)] -pub struct SupportedDTCExtDataRecord { - /// Same representation as [`DTCStatusMask`] but with the bits 'on' representing the DTC status supported by the server - pub status_availability_mask: DTCStatusAvailabilityMask, - /// Request message to get a stored [`DTCExtDataRecord`] - pub ext_data_record_number: Option, - pub dtc_and_status_records: Vec<(DTCRecord, DTCStatusMask)>, -} - /// Have to reference SAE J1979-DA for the corresponding DTC readiness groups and the [`FunctionalGroupIdentifier`]s /// This RGID depends on the functional group type DTCReadinessGroupIdentifier = u8; // RGID @@ -383,200 +196,6 @@ impl ReadDTCInfoSubFunction { } } -impl WireFormat for ReadDTCInfoSubFunction { - #[allow(clippy::match_same_arms)] - fn required_size(&self) -> usize { - 1 + match self { - Self::ReportNumberOfDTC_ByStatusMask(_) => 1, - Self::ReportDTC_ByStatusMask(_) => 1, - Self::ReportDTCSnapshotIdentification => 0, - Self::ReportDTCSnapshotRecord_ByDTCNumber(_, _) => 4, - Self::ReportDTCStoredData_ByRecordNumber(_) => 2, - Self::ReportDTCExtDataRecord_ByDTCNumber(_, _) => 4, - Self::ReportNumberOfDTC_BySeverityMaskRecord(_, _) => 2, - Self::ReportDTC_BySeverityMaskRecord(_, _) => 2, - Self::ReportSeverityInfoOfDTC(_) => 3, - Self::ReportSupportedDTC => 0, - Self::ReportFirstTestFailedDTC => 0, - Self::ReportFirstConfirmedDTC => 0, - Self::ReportMostRecentTestFailedDTC => 0, - Self::ReportMostRecentConfirmedDTC => 0, - Self::ReportDTCFaultDetectionCounter => 0, - Self::ReportDTCWithPermanentStatus => 0, - Self::ReportDTCExtDataRecord_ByRecordNumber(_) => 1, - Self::ReportUserDefMemoryDTC_ByStatusMask(_) => 1, - Self::ReportUserDefMemoryDTCSnapshotRecord_ByDTCNumber(_, _, _) => 5, - Self::ReportUserDefMemoryDTCExtDataRecord_ByDTCNumber(_, _, _) => 5, - Self::ReportSupportedDTCExtDataRecord(_) => 1, - Self::ReportWWHOBDDTC_ByMaskRecord(_, _, _) => 3, - Self::ReportWWHOBDDTC_WithPermanentStatus(_) => 1, - Self::ReportDTCInformation_ByDTCReadinessGroupIdentifier(_, _) => 2, - - Self::ISOSAEReserved(_) => 0, - } - } - - #[allow(clippy::match_same_arms)] - fn encode(&self, writer: &mut T) -> Result { - // Write the subfunction value - writer.write_u8(self.value())?; - match self { - Self::ReportNumberOfDTC_ByStatusMask(mask) => { - mask.encode(writer)?; - } - Self::ReportDTC_ByStatusMask(mask) => { - mask.encode(writer)?; - } - Self::ReportDTCSnapshotIdentification => {} - Self::ReportDTCSnapshotRecord_ByDTCNumber(mask, record_number) => { - mask.encode(writer)?; - record_number.encode(writer)?; - } - Self::ReportDTCStoredData_ByRecordNumber(record_number) => { - record_number.encode(writer)?; - } - Self::ReportDTCExtDataRecord_ByDTCNumber(mask, record_number) => { - mask.encode(writer)?; - record_number.encode(writer)?; - } - Self::ReportNumberOfDTC_BySeverityMaskRecord(severity, status) => { - writer.write_u8(severity.bits())?; - status.encode(writer)?; - } - Self::ReportDTC_BySeverityMaskRecord(severity, status) => { - writer.write_u8(severity.bits())?; - status.encode(writer)?; - } - Self::ReportSeverityInfoOfDTC(mask) => { - mask.encode(writer)?; - } - Self::ReportSupportedDTC => {} - Self::ReportFirstTestFailedDTC => {} - Self::ReportFirstConfirmedDTC => {} - Self::ReportMostRecentTestFailedDTC => {} - Self::ReportMostRecentConfirmedDTC => {} - Self::ReportDTCFaultDetectionCounter => {} - Self::ReportDTCWithPermanentStatus => {} - Self::ReportDTCExtDataRecord_ByRecordNumber(record_number) => { - record_number.encode(writer)?; - } - Self::ReportUserDefMemoryDTC_ByStatusMask(mask) => { - mask.encode(writer)?; - } - Self::ReportUserDefMemoryDTCSnapshotRecord_ByDTCNumber(mask, number, selection) => { - mask.encode(writer)?; - number.encode(writer)?; - writer.write_u8(*selection)?; - } - Self::ReportUserDefMemoryDTCExtDataRecord_ByDTCNumber(mask, number, selection) => { - mask.encode(writer)?; - number.encode(writer)?; - writer.write_u8(*selection)?; - } - Self::ReportSupportedDTCExtDataRecord(number) => { - number.encode(writer)?; - } - Self::ReportWWHOBDDTC_ByMaskRecord(group, status, severity) => { - writer.write_u8(group.value())?; - status.encode(writer)?; - writer.write_u8(severity.bits())?; - } - Self::ReportWWHOBDDTC_WithPermanentStatus(group) => { - writer.write_u8(group.value())?; - } - Self::ReportDTCInformation_ByDTCReadinessGroupIdentifier(group, readiness) => { - writer.write_u8(group.value())?; - writer.write_u8(*readiness)?; - } - Self::ISOSAEReserved(value) => { - writer.write_u8(*value)?; - } - } - Ok(self.required_size()) - } -} - -impl SingleValueWireFormat for ReadDTCInfoSubFunction { - #[allow(clippy::match_same_arms)] - fn decode(reader: &mut T) -> Result { - let report_type = reader.read_u8()?; - - let subfunction = match report_type { - 0x01 | 0x02 => { - let status = DTCStatusMask::from(reader.read_u8()?); - match report_type { - 0x01 => Self::ReportNumberOfDTC_ByStatusMask(status), - 0x02 => Self::ReportDTC_ByStatusMask(status), - _ => unreachable!(), - } - } - 0x03 => Self::ReportDTCSnapshotIdentification, - 0x04 => Self::ReportDTCSnapshotRecord_ByDTCNumber( - ::decode(reader)?, - DTCSnapshotRecordNumber::decode(reader)?, - ), - 0x05 => { - Self::ReportDTCStoredData_ByRecordNumber(DTCStoredDataRecordNumber::decode(reader)?) - } - // 0xFF for all records, 0xFE for all OBD records - 0x06 => Self::ReportDTCExtDataRecord_ByDTCNumber( - ::decode(reader)?, - DTCExtDataRecordNumber::decode(reader)?, - ), - 0x07 => Self::ReportNumberOfDTC_BySeverityMaskRecord( - DTCSeverityMask::from(reader.read_u8()?), - DTCStatusMask::from(reader.read_u8()?), - ), - 0x08 => Self::ReportDTC_BySeverityMaskRecord( - DTCSeverityMask::from(reader.read_u8()?), - DTCStatusMask::from(reader.read_u8()?), - ), - 0x09 => Self::ReportSeverityInfoOfDTC(::decode(reader)?), - 0x0A => Self::ReportSupportedDTC, - 0x0B => Self::ReportFirstTestFailedDTC, - 0x0C => Self::ReportFirstConfirmedDTC, - 0x0D => Self::ReportMostRecentTestFailedDTC, - 0x0E => Self::ReportMostRecentConfirmedDTC, - 0x14 => Self::ReportDTCFaultDetectionCounter, - 0x15 => Self::ReportDTCWithPermanentStatus, - 0x16 => { - Self::ReportDTCExtDataRecord_ByRecordNumber(DTCExtDataRecordNumber::decode(reader)?) - } - 0x17 => { - Self::ReportUserDefMemoryDTC_ByStatusMask(DTCStatusMask::from(reader.read_u8()?)) - } - // 0xFF for all records - 0x18 => Self::ReportUserDefMemoryDTCSnapshotRecord_ByDTCNumber( - ::decode(reader)?, - DTCSnapshotRecordNumber::decode(reader)?, - reader.read_u8()?, - ), - 0x19 => Self::ReportUserDefMemoryDTCExtDataRecord_ByDTCNumber( - ::decode(reader)?, - DTCExtDataRecordNumber::decode(reader)?, - reader.read_u8()?, - ), - 0x1A => Self::ReportSupportedDTCExtDataRecord(DTCExtDataRecordNumber::decode(reader)?), - 0x42 => Self::ReportWWHOBDDTC_ByMaskRecord( - FunctionalGroupIdentifier::from(reader.read_u8()?), - DTCStatusMask::from(reader.read_u8()?), - DTCSeverityMask::from(reader.read_u8()?), - ), - 0x43..=0x54 => Self::ISOSAEReserved(report_type), - 0x55 => Self::ReportWWHOBDDTC_WithPermanentStatus(FunctionalGroupIdentifier::from( - reader.read_u8()?, - )), - 0x56 => Self::ReportDTCInformation_ByDTCReadinessGroupIdentifier( - FunctionalGroupIdentifier::from(reader.read_u8()?), - reader.read_u8()?, - ), - 0x57..=0x7F => Self::ISOSAEReserved(report_type), - _ => return Err(Error::InvalidDtcSubfunctionType(report_type)), - }; - Ok(subfunction) - } -} - type NumberOfDTCs = u16; /// Same representation as [`DTCStatusMask`] but with the bits 'on' representing the DTC status supported by the server /// IE if the server doesn't support [`DTCStatusMask::WarningIndicatorRequested`] then the bit for that status will be 'off' @@ -587,539 +206,6 @@ type DTCStatusAvailabilityMask = DTCStatusMask; type SubFunctionID = u8; /// Response payloads can be shared among multiple request subfunctions -/// -/// For example, subfunction 0x01 and 0x07 both return the number of DTCs -/// and have the same response format -#[cfg_attr(feature = "serde", derive(serde::Deserialize, serde::Serialize))] -#[cfg_attr(feature = "utoipa", derive(utoipa::ToSchema))] -#[derive(Clone, Debug, PartialEq)] -#[non_exhaustive] -pub enum ReadDTCInfoResponse { - /// * Parameter: [`DTCStatusMask`] (1) - /// * Parameter: `NumberOfDTCs`(2) - /// - /// For subfunctions 0x01, 0x07 - /// * 0x01: [`ReadDTCInfoSubFunction::ReportNumberOfDTC_ByStatusMask`] - /// * 0x07: [`ReadDTCInfoSubFunction::ReportNumberOfDTC_BySeverityMaskRecord`] - NumberOfDTCs(SubFunctionID, DTCStatusAvailabilityMask, NumberOfDTCs), - - /// A list of DTCs matching the subfunction request - /// - /// * Parameter: [`DTCStatusMask`] (1) - /// * Parameter: `Vec` (4 * n) - /// - /// Note: DTC list can be empty if there are none to report, - /// but the response will still be sent - /// - /// For subfunctions 0x02, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x15 - /// * 0x02: [`ReadDTCInfoSubFunction::ReportDTC_ByStatusMask`] - /// * 0x0A: [`ReadDTCInfoSubFunction::ReportSupportedDTC`] - /// * 0x0B: [`ReadDTCInfoSubFunction::ReportFirstTestFailedDTC`] - /// * 0x0C: [`ReadDTCInfoSubFunction::ReportFirstConfirmedDTC`] - /// * 0x0D: [`ReadDTCInfoSubFunction::ReportMostRecentTestFailedDTC`] - /// * 0x0E: [`ReadDTCInfoSubFunction::ReportMostRecentConfirmedDTC`] - /// * 0x15: [`ReadDTCInfoSubFunction::ReportDTCWithPermanentStatus`] - DTCList( - SubFunctionID, - DTCStatusAvailabilityMask, - Vec<(DTCRecord, DTCStatusMask)>, - ), - - /// Snapshot identification - aka "Freeze Frame" - /// - /// Parameter: Vec<(`DTCRecord`, `DTCSnapshotRecordNumber`> (4 * n) - /// - /// Note: `DTCSnapshot` list might be empty - /// - /// For subfunction 0x03 - /// * 0x03: [`ReadDTCInfoSubFunction::ReportDTCSnapshotIdentification`] - DTCSnapshotList(Vec<(DTCRecord, DTCSnapshotRecordNumber)>), - - /// Get the DTC status and snapshot number and information w/ corresponding Data Identifier (DID) - /// - /// DTC, Status, snapshot number, # of identifiers, DID (times # of identifiers), Snapshot info. - /// - /// If all records are requested, it can be a theoretically large amount of data. - /// - /// Parameter: `DTCRecord` (3 bytes) - Echo of the request - /// Parameter: `DTCStatusMask` (1) - status of the requested DTC - /// C2/C4: There are multiple dataIdentifier/snapshotData combinations allowed to be present in a single `DTCSnapshotRecord`. - /// This can, for example be the case for the situation where a single dataIdentifier only references an integral part of data. When - /// the dataIdentifier references a block of data then a single dataIdentifier/snapshotData combination can be used. - /// - /// Note: See example 12.3.5.6.2 in ISO 14229-1:2020 for more information - /// - /// For subfunction 0x04 - /// * 0x04: [`ReadDTCInfoSubFunction::ReportDTCSnapshotRecord_ByDTCNumber`] - DTCSnapshotRecordList(DTCSnapshotRecordList), - - /// List of [`crate::DTCExtDataRecord`]s for a given DTC. - /// - /// `UserPayload` is so the data can be read according to a specific format - /// defined by the supplier/vehicle manufacturer - /// - /// * Parameter: [`DTCRecord`] (3 bytes) - Echo of the request - /// * Parameter: [`DTCStatusMask`] (1) - status of the requested DTC - /// * Parameter: [`crate::DTCExtDataRecord`] (n) - /// - /// For subfunction 0x06 - /// * 0x06: [`ReadDTCInfoSubFunction::ReportDTCExtDataRecord_ByDTCNumber`] - DTCExtDataRecordList(DTCExtDataRecordList), - - /// List of DTC Records that either match a severity and status mask for subfunction [`ReadDTCInfoSubFunction::ReportDTC_BySeverityMaskRecord`], - /// or a single record if the request type was [`ReadDTCInfoSubFunction::ReportSeverityInfoOfDTC`]. - /// - /// * Parameter: [`DTCStatusMask`] (1 byte) - /// * Parameter: `Vec` (6 bytes) - /// - /// For Subfunctions 0x08, 0x09 - /// * 0x08: [`ReadDTCInfoSubFunction::ReportDTC_BySeverityMaskRecord`] - /// * 0x09: [`ReadDTCInfoSubFunction::ReportSeverityInfoOfDTC`] - DTCSeverityRecordList( - SubFunctionID, - DTCStatusAvailabilityMask, - Vec, - ), - /// List of DTC Records along with their fault detection counters for subfunction [`ReadDTCInfoSubFunction::ReportDTCFaultDetectionCounter`]. - - /// - /// * Parameter: [`DTCRecord`] - (3 bytes) - /// * Parameter: `DTCFaultDetectionCounter` - (1 byte) - /// - /// For Subfunction 0x14: - /// * 0x14: [`ReadDTCInfoSubFunction::ReportDTCFaultDetectionCounter`] - DTCFaultDetectionCounterRecordList(Vec), - - /// List of DTCs out of User Defined DTC Memory and corresponding statuses matching client - /// defined status mask - /// - /// * Parameter: `UserDefMemoryDTCByStatusMaskRecord` (n) - /// - /// For subfunction 0x17 - /// * 0x17: [`ReadDTCInfoSubFunction::ReportUserDefMemoryDTC_ByStatusMask`] - UserDefMemoryDTCByStatusMaskList(UserDefMemoryDTCByStatusMaskRecord), - - /// List of [`crate::DTCSnapshotRecord`]s for a given DTC. - /// - /// `UserPayload` is so the data can be read according to a specific format - /// defined by the supplier/vehicle manufacturer - /// - /// Contains a snapshot of data values from the time of the system malfunction occurrence. - /// * Parameter: `MemorySelection` (1) - user defined DTC memory when retrieving DTCs. - /// * Parameter: [`DTCRecord`] (3 bytes) - /// * Parameter: [`DTCStatusMask`] (1 bytes) - /// * Parameter: `Vec<(DTCSnapshotRecordNumber, DTCSnapshotRecord)>` (m*(1+n) bytes) - Echo of the request - /// - /// For subfunction 0x18 - /// * 0x18: [`ReadDTCInfoSubFunction::ReportUserDefMemoryDTCSnapshotRecord_ByDTCNumber`] - UserDefMemoryDTCSnapshotRecordByDTCNumberList( - UserDefMemoryDTCSnapshotRecordByDTCNumRecord, - ), - - /// DTCs which supports a `DTCExtendedDataRecord` - /// - /// * Parameter: [`DTCStatusMask`] (1) - /// * Parameter: `Option` (1) - /// * Parameter: `Vec<(DTCRecord, DTCStatusMask)>` (4 * n bytes) - /// - /// `Option` is only present if atleast one DTC supports the `DTCExtendedDataRecord` - /// `Vec<(DTCRecord, DTCStatusMask)>` length is non-zero only if atleast one DTC supports the `DTCExtendedDataRecord` - /// - /// For Subfunction 0x1A - /// * 0x1A: [`ReadDTCInfoSubFunction::ReportSupportedDTCExtDataRecord`] - SupportedDTCExtDataRecordList(SupportedDTCExtDataRecord), - - /// List of WWH OBD DTCs and corresponding status and severity information - /// matching a client defined status mask and severity mask record - /// - ///Contains a struct of `WWHOBDDTCByMaskRecord` - /// * Parameter: [`FunctionalGroupIdentifier`] (1) - /// * Parameter: [`DTCStatusMask`] (1) - /// * Parameter: [`DTCSeverityMask`] (1) - /// * Parameter: [`DTCFormatIdentifier`] (1) - /// * Parameter: `Vec<(DTCSeverityMask, DTCRecord, DTCStatusMask)>` (5*n) - /// - /// Only possible options for [`DTCFormatIdentifier`] : - /// `DTCFormatIdentifier::SAE_J2012_DA_DTCFormat_04` - /// `DTCFormatIdentifier::SAE_J1939_73_DTCFormat` - /// * Returns `Error::InvalidDtcFormatIdentifier` in case of incorrect `DTCFormatIdentifier` - /// - /// For Subfunction 0x42 - /// * 0x42: [`ReadDTCInfoSubFunction::ReportWWHOBDDTC_ByMaskRecord`] - WWHOBDDTCByMaskRecordList(WWHOBDDTCByMaskRecord), - - /// List of WWH OBD DTCs with "permanent DTC" status as described in 3.12 - /// - ///Contains a struct of `WWHOBDDTCWithPermanentStatusRecord` - /// * Parameter: [`FunctionalGroupIdentifier`] (1) - /// * Parameter: [`DTCStatusMask`] (1) - /// * Parameter: [`DTCFormatIdentifier`] (1) - /// * Parameter: `Vec<(DTCRecord, DTCStatusMask)>` (4*n) - /// - /// Only possible options for [`DTCFormatIdentifier`] : - /// `DTCFormatIdentifier::SAE_J2012_DA_DTCFormat_04` - /// `DTCFormatIdentifier::SAE_J1939_73_DTCFormat` - /// * Returns `Error::InvalidDtcFormatIdentifier` in case of incorrect `DTCFormatIdentifier` - /// - /// For Subfunction 0x55 - /// * 0x55: [`ReadDTCInfoSubFunction::ReportWWHOBDDTC_WithPermanentStatus`] - WWHOBDDTCWithPermanentStatusList(WWHOBDDTCWithPermanentStatusRecord), - - /// List of OBD DTCs which matches the `DTCReadiness` Group Identifier - /// - /// Contains a struct of `DTCByReadinessGroupIdentifierRecord` - /// * Parameter: [`FunctionalGroupIdentifier`] (1) - /// * Parameter: [`DTCStatusMask`] (1) - /// * Parameter: [`DTCFormatIdentifier`] (1) - /// * Parameter: `DTCReadinessGroupIdentifier` (1) - /// * Parameter: `Vec<(DTCRecord, DTCStatusMask)>` (5*n) - /// - /// For Subfunction 0x56 - /// * 0x56: [`ReadDTCInfoSubFunction::ReportDTCInformation_ByDTCReadinessGroupIdentifier`] - DTCByReadinessGroupIdentifierList(DTCByReadinessGroupIdentifierRecord), -} - -impl WireFormat for ReadDTCInfoResponse { - fn required_size(&self) -> usize { - // subfunction ID + subfunction contents - 1 + match self { - Self::NumberOfDTCs(_, _, _) => 3, - Self::DTCList(_, _, list) => 1 + list.len() * 4, - Self::DTCSnapshotList(list) => 1 + list.len() * 4, - Self::DTCSnapshotRecordList(list) => list.required_size(), - Self::DTCExtDataRecordList(list) => list.required_size(), - Self::DTCSeverityRecordList(_, _, list) => 1 + list.len() * 6, - Self::DTCFaultDetectionCounterRecordList(list) => list.len() * 4, - Self::UserDefMemoryDTCByStatusMaskList(list) => 2 + list.record_data.len() * 4, - Self::UserDefMemoryDTCSnapshotRecordByDTCNumberList(list) => list.required_size(), - Self::SupportedDTCExtDataRecordList(list) => { - if list.ext_data_record_number.is_some() { - 2 + list.dtc_and_status_records.len() * 4 - } else { - 1 - } - } - Self::WWHOBDDTCByMaskRecordList(response_struct) => { - 4 + response_struct.record_data.len() * 5 - } - Self::WWHOBDDTCWithPermanentStatusList(response_struct) => { - 3 + response_struct.record_data.len() * 4 - } - Self::DTCByReadinessGroupIdentifierList(response_struct) => { - 4 + response_struct.record_data.len() * 4 - } - } - } - - #[allow(clippy::too_many_lines)] - fn encode(&self, writer: &mut T) -> Result { - match self { - Self::NumberOfDTCs(id, mask, count) => { - writer.write_u8(*id)?; - writer.write_u8(mask.bits())?; - writer.write_u16::(*count)?; - } - Self::DTCList(id, mask, list) => { - writer.write_u8(*id)?; - writer.write_u8(mask.bits())?; - for (record, status) in list { - record.encode(writer)?; - status.encode(writer)?; - } - } - Self::DTCSnapshotList(list) => { - writer.write_u8(0x03)?; - for (record, number) in list { - record.encode(writer)?; - number.encode(writer)?; - } - } - Self::DTCSnapshotRecordList(list) => { - writer.write_u8(0x04)?; - list.encode(writer)?; - } - Self::DTCExtDataRecordList(list) => { - writer.write_u8(0x06)?; - list.encode(writer)?; - } - Self::DTCFaultDetectionCounterRecordList(list) => { - writer.write_u8(0x14)?; - for fault_detection_counter in list { - fault_detection_counter.encode(writer)?; - } - } - Self::DTCSeverityRecordList(id, status, list) => { - writer.write_u8(*id)?; - status.encode(writer)?; - for dtcs in list { - dtcs.encode(writer)?; - } - } - Self::UserDefMemoryDTCByStatusMaskList(data_record_struct) => { - writer.write_u8(0x17)?; - writer.write_u8(data_record_struct.memory_selection)?; - data_record_struct.status_availability_mask.encode(writer)?; - for (data_record, status) in &data_record_struct.record_data { - data_record.encode(writer)?; - status.encode(writer)?; - } - } - - Self::UserDefMemoryDTCSnapshotRecordByDTCNumberList(snapshot_struct) => { - writer.write_u8(0x18)?; - snapshot_struct.encode(writer)?; - } - Self::SupportedDTCExtDataRecordList(response_struct) => { - writer.write_u8(0x1A)?; - response_struct.status_availability_mask.encode(writer)?; - if let Some(record_number) = &response_struct.ext_data_record_number { - record_number.encode(writer)?; - for (record, status) in &response_struct.dtc_and_status_records { - record.encode(writer)?; - status.encode(writer)?; - } - } - } - Self::WWHOBDDTCByMaskRecordList(response_struct) => { - writer.write_u8(0x42)?; - writer.write_u8(response_struct.functional_group_identifier.value())?; - response_struct.status_availability_mask.encode(writer)?; - writer.write_u8(response_struct.severity_availability_mask.into())?; - writer.write_u8(response_struct.format_identifier.into())?; - for (dtc_severity, dtc_record, dtc_status) in &response_struct.record_data { - writer.write_u8((*dtc_severity).into())?; - dtc_record.encode(writer)?; - dtc_status.encode(writer)?; - } - } - Self::WWHOBDDTCWithPermanentStatusList(response_struct) => { - writer.write_u8(0x55)?; - writer.write_u8(response_struct.functional_group_identifier.value())?; - response_struct.status_availability_mask.encode(writer)?; - writer.write_u8(response_struct.format_identifier.into())?; - for (dtc_record, dtc_status) in &response_struct.record_data { - dtc_record.encode(writer)?; - dtc_status.encode(writer)?; - } - } - Self::DTCByReadinessGroupIdentifierList(response_struct) => { - writer.write_u8(0x56)?; - writer.write_u8(response_struct.functional_group_identifier.value())?; - response_struct.status_availability_mask.encode(writer)?; - writer.write_u8(response_struct.format_identifier.into())?; - writer.write_u8(response_struct.readiness_group_identifier)?; - for (dtc_record, dtc_status) in &response_struct.record_data { - dtc_record.encode(writer)?; - dtc_status.encode(writer)?; - } - } - } - Ok(self.required_size()) - } -} - -impl SingleValueWireFormat for ReadDTCInfoResponse { - #[allow(clippy::too_many_lines)] - fn decode(reader: &mut T) -> Result { - let subfunction_id = reader.read_u8()?; - - match subfunction_id { - 0x01 | 0x07 => { - let status = DTCStatusAvailabilityMask::from(reader.read_u8()?); - let count = reader.read_u16::()?; - Ok(Self::NumberOfDTCs(subfunction_id, status, count)) - } - 0x02 | 0x0A | 0x0B | 0x0C | 0x0D | 0x0E | 0x15 => { - let status = DTCStatusAvailabilityMask::from(reader.read_u8()?); - let mut dtcs: Vec<(DTCRecord, DTCStatusMask)> = Vec::new(); - - // Loop until we're done with the reader and fill the DTC list - while let Ok(Some(record)) = DTCRecord::decode_next(reader) { - match reader.read_u8() { - Ok(status) => dtcs.push((record, DTCStatusMask::from(status))), - Err(_) => break, - } - } - - Ok(Self::DTCList(subfunction_id, status, dtcs)) - } - 0x03 => { - let mut dtcs: Vec<(DTCRecord, DTCSnapshotRecordNumber)> = Vec::new(); - - // Loop until we're done with the reader and fill the DTC list - while let Ok(Some(record)) = DTCRecord::decode_next(reader) { - match DTCSnapshotRecordNumber::decode_next(reader)? { - Some(number) => dtcs.push((record, number)), - None => break, - } - } - - Ok(Self::DTCSnapshotList(dtcs)) - } - 0x04 => { - let snapshot_list = DTCSnapshotRecordList::decode(reader)?; - Ok(Self::DTCSnapshotRecordList(snapshot_list)) - } - 0x06 => { - let ext_data_list = DTCExtDataRecordList::decode(reader)?; - Ok(Self::DTCExtDataRecordList(ext_data_list)) - } - 0x08 | 0x09 => { - let status = DTCStatusAvailabilityMask::from(reader.read_u8()?); - let mut dtcs = Vec::new(); - - for dtc_severity_record in DTCSeverityRecord::decode_iter(reader) { - match dtc_severity_record { - Ok(p) => { - dtcs.push(p); - } - Err(e) => { - return Err(e); - } - } - } - - Ok(Self::DTCSeverityRecordList(subfunction_id, status, dtcs)) - } - 0x14 => { - let mut dtcs = Vec::new(); - for dtc_fault_record in DTCFaultDetectionCounterRecord::decode_iter(reader) { - match dtc_fault_record { - Ok(p) => { - dtcs.push(p); - } - Err(e) => { - return Err(e); - } - } - } - Ok(Self::DTCFaultDetectionCounterRecordList(dtcs)) - } - 0x17 => { - let memory_selection = reader.read_u8()?; - let status_availability_mask = DTCStatusMask::decode(reader)?; - let mut record_data = Vec::new(); - - while let Ok(Some(record)) = DTCRecord::decode_next(reader) { - let status = DTCStatusMask::decode(reader)?; - record_data.push((record, status)); - } - - Ok(Self::UserDefMemoryDTCByStatusMaskList( - UserDefMemoryDTCByStatusMaskRecord { - memory_selection, - status_availability_mask, - record_data, - }, - )) - } - 0x18 => Ok(Self::UserDefMemoryDTCSnapshotRecordByDTCNumberList( - UserDefMemoryDTCSnapshotRecordByDTCNumRecord::decode(reader)?, - )), - 0x1A => { - let status_availability_mask = DTCStatusAvailabilityMask::decode(reader)?; - let mut dtc_and_status_records = Vec::new(); - let ext_data_record_number = DTCExtDataRecordNumber::decode_next(reader)?; - if ext_data_record_number.is_some() { - while let Ok(Some(dtc_record)) = DTCRecord::decode_next(reader) { - let dtc_status = DTCStatusMask::decode(reader)?; - dtc_and_status_records.push((dtc_record, dtc_status)); - } - } - Ok(Self::SupportedDTCExtDataRecordList( - SupportedDTCExtDataRecord { - status_availability_mask, - ext_data_record_number, - dtc_and_status_records, - }, - )) - } - - 0x42 => { - let functional_group_identifier = - FunctionalGroupIdentifier::from(reader.read_u8()?); - let status_availability_mask = DTCStatusAvailabilityMask::decode(reader)?; - let severity_availability_mask = DTCSeverityMask::from(reader.read_u8()?); - let format_identifier = DTCFormatIdentifier::from(reader.read_u8()?); - if (format_identifier != DTCFormatIdentifier::SAE_J2012_DA_DTCFormat_04) - && (format_identifier != DTCFormatIdentifier::SAE_J1939_73_DTCFormat) - { - return Err(Error::InvalidDtcFormatIdentifier(u8::from( - format_identifier, - ))); - } - let mut record_data = Vec::new(); - while let Ok(dtc_severity_mask) = reader.read_u8() { - let dtc_severity_mask = DTCSeverityMask::from(dtc_severity_mask); - let dtc_record = ::decode(reader)?; - let dtc_status = DTCStatusMask::decode(reader)?; - record_data.push((dtc_severity_mask, dtc_record, dtc_status)); - } - - Ok(Self::WWHOBDDTCByMaskRecordList(WWHOBDDTCByMaskRecord { - functional_group_identifier, - status_availability_mask, - severity_availability_mask, - format_identifier, - record_data, - })) - } - 0x55 => { - let functional_group_identifier = - FunctionalGroupIdentifier::from(reader.read_u8()?); - let status_availability_mask = DTCStatusAvailabilityMask::decode(reader)?; - let format_identifier = DTCFormatIdentifier::from(reader.read_u8()?); - if !matches!( - format_identifier, - DTCFormatIdentifier::SAE_J2012_DA_DTCFormat_04 - | DTCFormatIdentifier::SAE_J1939_73_DTCFormat - ) { - return Err(Error::InvalidDtcFormatIdentifier(u8::from( - format_identifier, - ))); - } - let mut record_data = Vec::new(); - while let Ok(Some(dtc_record)) = DTCRecord::decode_next(reader) { - let dtc_status = DTCStatusMask::decode(reader)?; - record_data.push((dtc_record, dtc_status)); - } - - Ok(Self::WWHOBDDTCWithPermanentStatusList( - WWHOBDDTCWithPermanentStatusRecord { - functional_group_identifier, - status_availability_mask, - format_identifier, - record_data, - }, - )) - } - 0x56 => { - let functional_group_identifier = - FunctionalGroupIdentifier::from(reader.read_u8()?); - let status_availability_mask = DTCStatusAvailabilityMask::decode(reader)?; - let format_identifier = DTCFormatIdentifier::from(reader.read_u8()?); - let readiness_group_identifier = - DTCReadinessGroupIdentifier::from(reader.read_u8()?); - let mut record_data = Vec::new(); - while let Ok(Some(dtc_record)) = DTCRecord::decode_next(reader) { - let dtc_status = DTCStatusMask::decode(reader)?; - record_data.push((dtc_record, dtc_status)); - } - - Ok(Self::DTCByReadinessGroupIdentifierList( - DTCByReadinessGroupIdentifierRecord { - functional_group_identifier, - status_availability_mask, - format_identifier, - readiness_group_identifier, - record_data, - }, - )) - } - _ => todo!(), // _ => Err(Error::InvalidDtcSubfunctionType(subfunction_id)), - } - } -} // --------------------------------------------------------------------------- // no_std RX types with lazy iterators @@ -1447,854 +533,3 @@ impl<'a> Decode<'a> for ReadDTCInfoResponseRx<'a> { } } -#[cfg(test)] -mod response { - - use super::*; - - #[cfg_attr(feature = "serde", derive(serde::Deserialize, serde::Serialize))] - #[derive(Clone, Copy, Debug, PartialEq)] - pub enum TestIdentifier { - Abracadabra = 0xBEEF, - } - - impl PartialEq for TestIdentifier { - fn eq(&self, other: &u16) -> bool { - match self { - TestIdentifier::Abracadabra => *other == 0xBEEF, - } - } - } - - impl WireFormat for TestIdentifier { - fn encode(&self, writer: &mut T) -> Result { - writer.write_u16::(*self as u16)?; - Ok(self.required_size()) - } - - fn required_size(&self) -> usize { - 2 - } - } - - impl IterableWireFormat for TestIdentifier { - fn decode_next(reader: &mut T) -> Result, Error> { - let mut buf = [0u8; 2]; - reader.read_exact(&mut buf)?; - - let id = u16::from_be_bytes(buf); - if TestIdentifier::Abracadabra == id { - Ok(Some(TestIdentifier::Abracadabra)) - } else { - Err(Error::NoDataAvailable) - } - } - } - - /////////////////////////////////////////////////////////////////////////////////////////////// - - #[cfg_attr(feature = "serde", derive(serde::Deserialize, serde::Serialize))] - #[derive(Clone, Copy, Debug, PartialEq)] - enum TestPayload { - Abracadabra(u8), - } - - impl WireFormat for TestPayload { - fn encode(&self, writer: &mut T) -> Result { - let id_bytes: u16 = match self { - TestPayload::Abracadabra(_) => 0xBEEF, - }; - - writer.write_all(&id_bytes.to_be_bytes())?; - - match self { - TestPayload::Abracadabra(value) => { - writer.write_u8(*value)?; - Ok(self.required_size()) - } - } - } - - fn required_size(&self) -> usize { - 3 - } - } - impl IterableWireFormat for TestPayload { - fn decode_next(reader: &mut T) -> Result, Error> { - let mut buf = [0u8; 2]; - reader.read_exact(&mut buf)?; - - let value = u16::from_be_bytes(buf); - - if value == TestIdentifier::Abracadabra as u16 { - let mut byte = [0u8; 1]; - reader.read_exact(&mut byte)?; - Ok(Some(TestPayload::Abracadabra(byte[0]))) - } else { - Err(Error::NoDataAvailable) - } - } - } - - #[test] - fn dtc_list() { - // skip formatting - #[rustfmt::skip] - let bytes = [ - 0x02, // subfunction - 0x01, // Availability mask - // First DTC record - 0x01, 0x02, 0x03, (DTCStatusMask::PendingDTC | DTCStatusMask::TestFailed).into(), - // Second DTC record - 0x17, 0x04, 0x03, DTCStatusMask::TestNotCompletedThisOperationCycle.into(), - ]; - let mut reader = &bytes[..]; - let response: ReadDTCInfoResponse = - ReadDTCInfoResponse::decode(&mut reader).unwrap(); - assert_eq!( - response, - ReadDTCInfoResponse::DTCList( - 0x02, - DTCStatusMask::TestFailed, - vec![ - ( - DTCRecord::new(0x01, 0x02, 0x03), - DTCStatusMask::PendingDTC | DTCStatusMask::TestFailed - ), - ( - DTCRecord::new(0x17, 0x04, 0x03), - DTCStatusMask::TestNotCompletedThisOperationCycle - ) - ] - ) - ); - - // write - let mut writer = Vec::new(); - let written = response.encode(&mut writer).unwrap(); - assert_eq!(writer, bytes); - assert_eq!(written, bytes.len()); - assert_eq!(written, response.required_size()); - } - - #[test] - fn severity_list_test() { - let bytes: [u8; 8] = [ - 0x08, // subfunction - 0x01, // Availability mask - DTCSeverityMask::CheckImmediately.into(), - FunctionalGroupIdentifier::EmissionsSystemGroup.into(), - 0x01, - 0x02, - 0x03, - (DTCStatusMask::PendingDTC | DTCStatusMask::TestFailed).into(), - ]; - let mut reader = &bytes[..]; - let response: ReadDTCInfoResponse = - ReadDTCInfoResponse::decode(&mut reader).unwrap(); - assert_eq!( - response, - ReadDTCInfoResponse::DTCSeverityRecordList( - 0x08, - DTCStatusMask::TestFailed, - vec![ - (DTCSeverityRecord { - severity: DTCSeverityMask::CheckImmediately, - functional_group_identifier: - FunctionalGroupIdentifier::EmissionsSystemGroup, - dtc_record: DTCRecord::new(0x01, 0x02, 0x03), - dtc_status_mask: (DTCStatusMask::PendingDTC | DTCStatusMask::TestFailed), - }) - ] - ) - ); - - // write - let mut writer = Vec::new(); - let written = response.encode(&mut writer).unwrap(); - assert_eq!(writer, bytes); - assert_eq!(written, bytes.len()); - assert_eq!(written, response.required_size()); - } - - #[test] - fn severity_empty_list_test() { - let bytes: [u8; 2] = [ - 0x08, // subfunction - 0x01, // Availability mask - ]; - let mut reader = &bytes[..]; - let response: ReadDTCInfoResponse = - ReadDTCInfoResponse::decode(&mut reader).unwrap(); - assert_eq!( - response, - ReadDTCInfoResponse::DTCSeverityRecordList(0x08, DTCStatusMask::TestFailed, vec![]) - ); - - // write - let mut writer = Vec::new(); - let written = response.encode(&mut writer).unwrap(); - assert_eq!(writer, bytes); - assert_eq!(written, bytes.len()); - assert_eq!(written, response.required_size()); - } - - #[test] - fn fault_detection_test() { - let bytes = [ - 0x14, // subfunction - 0x01, 0x02, 0x03, //DTC Record - 0x04, //DTC Status - ]; - let mut reader = &bytes[..]; - let response: ReadDTCInfoResponse = - ReadDTCInfoResponse::decode(&mut reader).unwrap(); - assert_eq!( - response, - ReadDTCInfoResponse::DTCFaultDetectionCounterRecordList(vec![ - DTCFaultDetectionCounterRecord { - dtc_record: DTCRecord::new(0x01, 0x02, 0x03), - dtc_fault_detection_counter: 0x04 - } - ]) - ); - - // write - let mut writer = Vec::new(); - let written = response.encode(&mut writer).unwrap(); - assert_eq!(writer, bytes); - assert_eq!(written, bytes.len()); - assert_eq!(written, response.required_size()); - } - #[test] - fn fault_detection_empty_test() { - let bytes = [ - 0x14, // subfunction - ]; - let mut reader = &bytes[..]; - let response: ReadDTCInfoResponse = - ReadDTCInfoResponse::decode(&mut reader).unwrap(); - assert_eq!( - response, - ReadDTCInfoResponse::DTCFaultDetectionCounterRecordList(vec![]) - ); - - // write - let mut writer = Vec::new(); - let written = response.encode(&mut writer).unwrap(); - assert_eq!(writer, bytes); - assert_eq!(written, bytes.len()); - assert_eq!(written, response.required_size()); - } - - #[test] - fn user_def_memory_dtc_by_statusmask_empty_list() { - // skip formatting - #[rustfmt::skip] - let bytes = [ - 0x17, // subfunction - 0x15, // Memory Selection - DTCStatusAvailabilityMask::TestFailed.into(), //Availability Mask - ]; - let mut reader = &bytes[..]; - - let response: ReadDTCInfoResponse = - ReadDTCInfoResponse::decode(&mut reader).unwrap(); - - assert_eq!( - response, - ReadDTCInfoResponse::UserDefMemoryDTCByStatusMaskList( - UserDefMemoryDTCByStatusMaskRecord { - memory_selection: 0x15, - status_availability_mask: DTCStatusAvailabilityMask::TestFailed, - record_data: vec![] - } - ) - ); - // write - let mut writer = Vec::new(); - let written = response.encode(&mut writer).unwrap(); - assert_eq!(writer, bytes, "Written: \n{writer:02X?}\n{bytes:02X?}"); - assert_eq!(written, bytes.len(), "Written: \n{writer:?}\n{bytes:?}"); - assert_eq!(written, response.required_size()); - } - - #[test] - fn user_def_memory_dtc_by_statusmask_list() { - // skip formatting - #[rustfmt::skip] - let bytes = [ - 0x17, // subfunction - 0x15, // Memory Selection - DTCStatusAvailabilityMask::TestFailed.into(), // Availability Mask - 0x12, 0x34, 0x56, // DTC Mask - DTCStatusMask::TestFailed.into(), // Status - 0x12, 0x34, 0x56, // DTC Mask - DTCStatusMask::TestFailed.into(), // Status - ]; - let mut reader = &bytes[..]; - - let response: ReadDTCInfoResponse = - ReadDTCInfoResponse::decode(&mut reader).unwrap(); - - assert_eq!( - response, - ReadDTCInfoResponse::UserDefMemoryDTCByStatusMaskList( - UserDefMemoryDTCByStatusMaskRecord { - memory_selection: 0x15, - status_availability_mask: DTCStatusAvailabilityMask::TestFailed, - record_data: vec![ - (DTCRecord::new(0x12, 0x34, 0x56), DTCStatusMask::TestFailed), - (DTCRecord::new(0x12, 0x34, 0x56), DTCStatusMask::TestFailed), - ] - } - ) - ); - // write - let mut writer = Vec::new(); - let written = response.encode(&mut writer).unwrap(); - assert_eq!(writer, bytes, "Written: \n{writer:02X?}\n{bytes:02X?}"); - assert_eq!(written, bytes.len(), "Written: \n{writer:?}\n{bytes:?}"); - assert_eq!(written, response.required_size()); - } - #[test] - fn user_def_memory_dtc_by_dtc_number_empty_list() { - // skip formatting - #[rustfmt::skip] - let bytes = [ - 0x18, // subfunction - 0x01, // Memory Selection - 0x12, 0x34, 0x56, // DTC Mask - DTCStatusAvailabilityMask::TestFailed.into(), // Availability Mask - ]; - let mut reader = &bytes[..]; - - let response: ReadDTCInfoResponse = - ReadDTCInfoResponse::decode(&mut reader).unwrap(); - - assert_eq!( - response, - ReadDTCInfoResponse::UserDefMemoryDTCSnapshotRecordByDTCNumberList( - UserDefMemoryDTCSnapshotRecordByDTCNumRecord { - memory_selection: 0x1, - dtc_record: DTCRecord::new(0x12, 0x34, 0x56), - dtc_status_mask: DTCStatusMask::TestFailed, - dtc_snapshot_record: vec![] - } - ) - ); - // write - let mut writer = Vec::new(); - let written = response.encode(&mut writer).unwrap(); - assert_eq!(writer, bytes, "Written: \n{writer:02X?}\n{bytes:02X?}"); - assert_eq!(written, bytes.len(), "Written: \n{writer:?}\n{bytes:?}"); - assert_eq!(written, response.required_size()); - } - - #[test] - fn user_def_memory_dtc_by_dtc_number_list() { - // skip formatting - #[rustfmt::skip] - let bytes = [ - 0x18, // subfunction - 0x01, // Memory Selection - 0x12, 0x34, 0x56, // DTC Mask - DTCStatusAvailabilityMask::TestFailed.into(), // Availability Mask - 0x13, // DTCSnapshotRecordNumber - 0x02, // DTCSnapshotRecordNumberOfIdentifiers - 0xBE, 0xEF, // SnapshotDataIdentifier - 0x05, // SnapshotData - 0xBE, 0xEF, // SnapshotDataIdentifier - 0x05, // SnapshotData - ]; - let mut reader = &bytes[..]; - - let response: ReadDTCInfoResponse = - ReadDTCInfoResponse::decode(&mut reader).unwrap(); - - assert_eq!( - response, - ReadDTCInfoResponse::UserDefMemoryDTCSnapshotRecordByDTCNumberList( - UserDefMemoryDTCSnapshotRecordByDTCNumRecord { - memory_selection: 0x1, - dtc_record: DTCRecord::new(0x12, 0x34, 0x56), - dtc_status_mask: DTCStatusMask::TestFailed, - dtc_snapshot_record: vec![( - DTCSnapshotRecordNumber::new(0x13), - DTCSnapshotRecord { - data: vec![ - TestPayload::Abracadabra(0x05), - TestPayload::Abracadabra(0x05) - ] - } - )] - } - ) - ); - // write - let mut writer = Vec::new(); - let written = response.encode(&mut writer).unwrap(); - assert_eq!(writer, bytes, "Written: \n{writer:02X?}\n{bytes:02X?}"); - assert_eq!(written, bytes.len(), "Written: \n{writer:?}\n{bytes:?}"); - assert_eq!(written, response.required_size()); - } - - #[test] - fn supported_dtc_ext_data_record_list() { - // skip formatting - #[rustfmt::skip] - let bytes = [ - 0x1A, // subfunction - DTCStatusAvailabilityMask::TestFailed.into(), // Availability Mask - DTCExtDataRecordNumber::AllDTCExtDataRecords.value(), // DTC Extended Data Record Number - 0x15,0x17,0x19 ,// DTCRecord - DTCStatusMask::TestFailedSinceLastClear.into(),// DTC Status - 0x15,0x17,0x19 ,// DTCRecord - DTCStatusMask::TestFailedSinceLastClear.into(),// DTC Status - ]; - let mut reader = &bytes[..]; - - let response: ReadDTCInfoResponse = - ReadDTCInfoResponse::decode(&mut reader).unwrap(); - - assert_eq!( - response, - ReadDTCInfoResponse::SupportedDTCExtDataRecordList(SupportedDTCExtDataRecord { - status_availability_mask: DTCStatusAvailabilityMask::TestFailed, - ext_data_record_number: Some(DTCExtDataRecordNumber::AllDTCExtDataRecords), - dtc_and_status_records: vec![ - ( - DTCRecord::new(0x15, 0x17, 0x19), // DTCRecord - DTCStatusMask::TestFailedSinceLastClear - ), - ( - DTCRecord::new(0x15, 0x17, 0x19), // DTCRecord - DTCStatusMask::TestFailedSinceLastClear - ) - ] - }) - ); - // write - let mut writer = Vec::new(); - let written = response.encode(&mut writer).unwrap(); - assert_eq!(writer, bytes, "Written: \n{writer:02X?}\n{bytes:02X?}"); - assert_eq!(written, bytes.len(), "Written: \n{writer:?}\n{bytes:?}"); - assert_eq!(written, response.required_size()); - } - - #[test] - fn supported_dtc_ext_data_record_empty_list() { - // skip formatting - #[rustfmt::skip] - let bytes = [ - 0x1A, // subfunction - DTCStatusAvailabilityMask::TestFailed.into(), // Availability Mask - ]; - let mut reader = &bytes[..]; - let response: ReadDTCInfoResponse = - ReadDTCInfoResponse::decode(&mut reader).unwrap(); - assert_eq!( - response, - ReadDTCInfoResponse::SupportedDTCExtDataRecordList(SupportedDTCExtDataRecord { - status_availability_mask: DTCStatusAvailabilityMask::TestFailed, - ext_data_record_number: None, - dtc_and_status_records: vec![] - }) - ); - // write - let mut writer = Vec::new(); - let written = response.encode(&mut writer).unwrap(); - assert_eq!(writer, bytes, "Written: \n{writer:02X?}\n{bytes:02X?}"); - assert_eq!(written, bytes.len(), "Written: \n{writer:?}\n{bytes:?}"); - assert_eq!(written, response.required_size()); - } - - #[test] - fn report_wwhobd_dtc_by_mask_record_list() { - // skip formatting - #[rustfmt::skip] - let bytes = [ - 0x42, // subfunction - FunctionalGroupIdentifier::VODBSystem.into(), - DTCStatusAvailabilityMask::TestFailed.into(), - DTCSeverityMask::DTCClass_0.into(), - DTCFormatIdentifier::SAE_J2012_DA_DTCFormat_04.into(), - DTCSeverityMask::DTCClass_0.into(), - 0x15,0x17,0x19 ,// DTCRecord - DTCStatusAvailabilityMask::TestFailed.into(), - DTCSeverityMask::DTCClass_0.into(), - 0x15,0x17,0x19 ,// DTCRecord - DTCStatusAvailabilityMask::TestFailed.into(), - ]; - let mut reader = &bytes[..]; - - let response: ReadDTCInfoResponse = - ReadDTCInfoResponse::decode(&mut reader).unwrap(); - - assert_eq!( - response, - ReadDTCInfoResponse::WWHOBDDTCByMaskRecordList(WWHOBDDTCByMaskRecord { - functional_group_identifier: FunctionalGroupIdentifier::VODBSystem, - status_availability_mask: DTCStatusAvailabilityMask::TestFailed, - severity_availability_mask: DTCSeverityMask::DTCClass_0, - format_identifier: DTCFormatIdentifier::SAE_J2012_DA_DTCFormat_04, - record_data: vec![ - ( - DTCSeverityMask::DTCClass_0, - DTCRecord::new(0x15, 0x17, 0x19), - DTCStatusAvailabilityMask::TestFailed - ), - ( - DTCSeverityMask::DTCClass_0, - DTCRecord::new(0x15, 0x17, 0x19), - DTCStatusAvailabilityMask::TestFailed - ) - ] - }) - ); - // write - let mut writer = Vec::new(); - let written = response.encode(&mut writer).unwrap(); - assert_eq!(writer, bytes, "Written: \n{writer:02X?}\n{bytes:02X?}"); - assert_eq!(written, bytes.len(), "Written: \n{writer:?}\n{bytes:?}"); - assert_eq!(written, response.required_size()); - } - - #[test] - fn report_wwhobd_dtc_by_mask_record_empty_list() { - // skip formatting - #[rustfmt::skip] - let bytes = [ - 0x42, // subfunction - FunctionalGroupIdentifier::VODBSystem.into(), - DTCStatusAvailabilityMask::TestFailed.into(), - DTCSeverityMask::all_flags().into(), - DTCFormatIdentifier::SAE_J2012_DA_DTCFormat_04.into(), - ]; - let mut reader = &bytes[..]; - - let response: ReadDTCInfoResponse = - ReadDTCInfoResponse::decode(&mut reader).unwrap(); - - assert_eq!( - response, - ReadDTCInfoResponse::WWHOBDDTCByMaskRecordList(WWHOBDDTCByMaskRecord { - functional_group_identifier: FunctionalGroupIdentifier::VODBSystem, - status_availability_mask: DTCStatusAvailabilityMask::TestFailed, - severity_availability_mask: DTCSeverityMask::all_flags(), - format_identifier: DTCFormatIdentifier::SAE_J2012_DA_DTCFormat_04, - record_data: vec![] - }) - ); - // write - let mut writer = Vec::new(); - let written = response.encode(&mut writer).unwrap(); - assert_eq!(writer, bytes, "Written: \n{writer:02X?}\n{bytes:02X?}"); - assert_eq!(written, bytes.len(), "Written: \n{writer:?}\n{bytes:?}"); - assert_eq!(written, response.required_size()); - } - - #[test] - fn report_wwhobd_dtc_with_permanent_status_list() { - // skip formatting - #[rustfmt::skip] - let bytes = [ - 0x55, // subfunction - FunctionalGroupIdentifier::VODBSystem.into(), - DTCStatusAvailabilityMask::TestFailed.into(), - DTCFormatIdentifier::SAE_J2012_DA_DTCFormat_04.into(), - 0x15,0x17,0x19 ,// DTCRecord - DTCStatusMask::TestFailed.into(), - 0x51,0x71,0x91 ,// DTCRecord - DTCStatusMask::TestFailed.into(), - ]; - let mut reader = &bytes[..]; - - let response: ReadDTCInfoResponse = - ReadDTCInfoResponse::decode(&mut reader).unwrap(); - - assert_eq!( - response, - ReadDTCInfoResponse::WWHOBDDTCWithPermanentStatusList( - WWHOBDDTCWithPermanentStatusRecord { - functional_group_identifier: FunctionalGroupIdentifier::VODBSystem, - status_availability_mask: DTCStatusAvailabilityMask::TestFailed, - format_identifier: DTCFormatIdentifier::SAE_J2012_DA_DTCFormat_04, - record_data: vec![ - (DTCRecord::new(0x15, 0x17, 0x19), DTCStatusMask::TestFailed), - (DTCRecord::new(0x51, 0x71, 0x91), DTCStatusMask::TestFailed) - ] - } - ) - ); - // write - let mut writer = Vec::new(); - let written = response.encode(&mut writer).unwrap(); - assert_eq!(writer, bytes, "Written: \n{writer:02X?}\n{bytes:02X?}"); - assert_eq!(written, bytes.len(), "Written: \n{writer:?}\n{bytes:?}"); - assert_eq!(written, response.required_size()); - } - - #[test] - fn report_dtc_by_readiness_group_identifier_list() { - // skip formatting - #[rustfmt::skip] - let bytes = [ - 0x56, // subfunction - FunctionalGroupIdentifier::VODBSystem.into(), - DTCStatusAvailabilityMask::TestFailed.into(), - DTCFormatIdentifier::SAE_J2012_DA_DTCFormat_04.into(), - 0x72,// Readiness Group Identifier - 0x15,0x17,0x19 ,// DTCRecord - DTCStatusAvailabilityMask::TestFailed.into(), - 0x51,0x71,0x91 ,// DTCRecord - DTCStatusAvailabilityMask::TestFailed.into(), - ]; - let mut reader = &bytes[..]; - - let response: ReadDTCInfoResponse = - ReadDTCInfoResponse::decode(&mut reader).unwrap(); - - assert_eq!( - response, - ReadDTCInfoResponse::DTCByReadinessGroupIdentifierList( - DTCByReadinessGroupIdentifierRecord { - functional_group_identifier: FunctionalGroupIdentifier::VODBSystem, - status_availability_mask: DTCStatusAvailabilityMask::TestFailed, - format_identifier: DTCFormatIdentifier::SAE_J2012_DA_DTCFormat_04, - readiness_group_identifier: DTCReadinessGroupIdentifier::from(0x72), - record_data: vec![ - ( - DTCRecord::new(0x15, 0x17, 0x19), - DTCStatusAvailabilityMask::TestFailed - ), - ( - DTCRecord::new(0x51, 0x71, 0x91), - DTCStatusAvailabilityMask::TestFailed - ) - ] - } - ) - ); - // write - let mut writer = Vec::new(); - let written = response.encode(&mut writer).unwrap(); - assert_eq!(writer, bytes, "Written: \n{writer:02X?}\n{bytes:02X?}"); - assert_eq!(written, bytes.len(), "Written: \n{writer:?}\n{bytes:?}"); - assert_eq!(written, response.required_size()); - } - - #[test] - fn report_dtc_by_readiness_group_identifier_empty_list() { - // skip formatting - #[rustfmt::skip] - let bytes = [ - 0x56, // subfunction - FunctionalGroupIdentifier::VODBSystem.into(), - DTCStatusAvailabilityMask::TestFailed.into(), - DTCFormatIdentifier::SAE_J2012_DA_DTCFormat_04.into(), - 0x72,// Readiness Group Identifier - ]; - let mut reader = &bytes[..]; - - let response: ReadDTCInfoResponse = - ReadDTCInfoResponse::decode(&mut reader).unwrap(); - - assert_eq!( - response, - ReadDTCInfoResponse::DTCByReadinessGroupIdentifierList( - DTCByReadinessGroupIdentifierRecord { - functional_group_identifier: FunctionalGroupIdentifier::VODBSystem, - status_availability_mask: DTCStatusAvailabilityMask::TestFailed, - format_identifier: DTCFormatIdentifier::SAE_J2012_DA_DTCFormat_04, - readiness_group_identifier: DTCReadinessGroupIdentifier::from(0x72), - record_data: vec![] - } - ) - ); - // write - let mut writer = Vec::new(); - let written = response.encode(&mut writer).unwrap(); - assert_eq!(writer, bytes, "Written: \n{writer:02X?}\n{bytes:02X?}"); - assert_eq!(written, bytes.len(), "Written: \n{writer:?}\n{bytes:?}"); - assert_eq!(written, response.required_size()); - } -} - -#[cfg(test)] -mod ext_data { - use super::*; - - #[cfg_attr(feature = "serde", derive(serde::Deserialize, serde::Serialize))] - #[derive(Clone, Copy, Debug, PartialEq)] - pub enum TestDTCExtDataRecordNumber { - // DTC records - WarmUpCycleCount = 0x04, - FaultDetectionCounter = 0x05, - } - - impl WireFormat for TestDTCExtDataRecordNumber { - fn required_size(&self) -> usize { - 1 - } - - fn encode(&self, writer: &mut T) -> Result { - writer.write_u8(*self as u8)?; - Ok(self.required_size()) - } - } - - impl IterableWireFormat for TestDTCExtDataRecordNumber { - fn decode_next(reader: &mut T) -> Result, Error> { - let id = reader.read_u8(); - match id { - Ok(0x04) => Ok(Some(TestDTCExtDataRecordNumber::WarmUpCycleCount)), - Ok(0x05) => Ok(Some(TestDTCExtDataRecordNumber::FaultDetectionCounter)), - Err(_) => Ok(None), - _ => Err(Error::NoDataAvailable), - } - } - } - - #[cfg_attr(feature = "serde", derive(serde::Deserialize, serde::Serialize))] - #[derive(Clone, Copy, Debug, PartialEq)] - enum TestDTCExtData { - WarmUpCycleCount(u16), - FaultDetectionCounter(u8), - } - - impl WireFormat for TestDTCExtData { - fn required_size(&self) -> usize { - match self { - TestDTCExtData::WarmUpCycleCount(_) => 3, - TestDTCExtData::FaultDetectionCounter(_) => 2, - } - } - - fn encode(&self, writer: &mut T) -> Result { - match self { - TestDTCExtData::WarmUpCycleCount(count) => { - writer.write_u8(TestDTCExtDataRecordNumber::WarmUpCycleCount as u8)?; - writer.write_u16::(*count)?; - } - TestDTCExtData::FaultDetectionCounter(count) => { - writer.write_u8(TestDTCExtDataRecordNumber::FaultDetectionCounter as u8)?; - writer.write_u8(*count)?; - } - } - Ok(self.required_size()) - } - } - - impl IterableWireFormat for TestDTCExtData { - fn decode_next(reader: &mut T) -> Result, Error> { - let id = TestDTCExtDataRecordNumber::decode_next(reader)?; - match id { - Some(TestDTCExtDataRecordNumber::WarmUpCycleCount) => { - let count = reader.read_u16::()?; - Ok(Some(TestDTCExtData::WarmUpCycleCount(count))) - } - Some(TestDTCExtDataRecordNumber::FaultDetectionCounter) => { - let count = reader.read_u8()?; - Ok(Some(TestDTCExtData::FaultDetectionCounter(count))) - } - None => Ok(None), - } - } - } - - #[test] - fn ext_data_list() { - // skip formatting - #[rustfmt::skip] - let bytes = [ - 0x06, // subfunction - // First DTC record - 0x12, 0x34, 0x56, // DTC Mask - 0x24, //Status - 0x04, // "WarmUpCycleCount" - //Ext data - 0xBE, 0xEF, - 0x05, // "FaultDetectionCounter" - 0x10, - - ]; - let mut reader = &bytes[..]; - let response: ReadDTCInfoResponse = - ReadDTCInfoResponse::decode(&mut reader).unwrap(); - - // write - let mut writer = Vec::new(); - let written = response.encode(&mut writer).unwrap(); - assert_eq!(writer, bytes, "Written: \n{writer:02X?}\n{bytes:02X?}"); - assert_eq!(written, bytes.len(), "Written: \n{writer:?}\n{bytes:?}"); - assert_eq!(written, response.required_size()); - } -} - -#[cfg(test)] -mod request { - use super::*; - use crate::DTCStatusMask; - - #[test] - fn test_read_dtc_information_request() { - let bytes = [0x01, 0x01]; - let mut reader = &bytes[..]; - let mut writer = Vec::new(); - ReadDTCInfoRequest::new(ReadDTCInfoSubFunction::ReportDTCStoredData_ByRecordNumber( - DTCStoredDataRecordNumber::new(5).unwrap(), - )) - .encode(&mut writer) - .unwrap(); - let request = ReadDTCInfoRequest::decode(&mut reader).unwrap(); - assert_eq!( - request, - ReadDTCInfoRequest { - dtc_subfunction: ReadDTCInfoSubFunction::ReportNumberOfDTC_ByStatusMask( - DTCStatusMask::TestFailed - ) - } - ); - } - - #[test] - fn test_read_dtc_information_subfunction() { - let mut writer = Vec::new(); - let b = ReadDTCInfoSubFunction::ReportDTCWithPermanentStatus; - b.encode(&mut writer).unwrap(); - - assert_eq!(writer, vec![0x15]); - - for id in 0x01..=0x07 { - let mut writer = Vec::new(); - let func = match id { - 0x01 => ReadDTCInfoSubFunction::ReportNumberOfDTC_ByStatusMask( - DTCStatusMask::TestFailed, - ), - 0x02 => ReadDTCInfoSubFunction::ReportDTC_ByStatusMask( - DTCStatusMask::WarningIndicatorRequested, - ), - 0x03 => ReadDTCInfoSubFunction::ReportDTCSnapshotIdentification, - 0x04 => ReadDTCInfoSubFunction::ReportDTCSnapshotRecord_ByDTCNumber( - DTCRecord::new(0x01, 0x02, 0x03), - DTCSnapshotRecordNumber::new(0x04), - ), - 0x05 => ReadDTCInfoSubFunction::ReportDTCStoredData_ByRecordNumber( - DTCStoredDataRecordNumber::new(0x20).unwrap(), - ), - 0x06 => ReadDTCInfoSubFunction::ReportDTCExtDataRecord_ByDTCNumber( - DTCRecord::new(0x01, 0x02, 0x03), - DTCExtDataRecordNumber::new(0x04), - ), - 0x07 => ReadDTCInfoSubFunction::ReportNumberOfDTC_BySeverityMaskRecord( - DTCSeverityMask::DTCClass_4, - DTCStatusMask::TestFailed, - ), - _ => unreachable!("Invalid loop value"), - }; - let written = func.encode(&mut writer).unwrap(); - assert_eq!(written, func.required_size()); - } - } -} diff --git a/src/services/request_download.rs b/src/services/request_download.rs index 760fd89..4e99c87 100644 --- a/src/services/request_download.rs +++ b/src/services/request_download.rs @@ -1,9 +1,8 @@ //! `RequestDownload` (0x34) service implementation -use byteorder_embedded_io::io::{ReadBytesExt, WriteBytesExt}; use crate::{ DataFormatIdentifier, Decode, Encode, Error, LengthFormatIdentifier, MemoryFormatIdentifier, - NegativeResponseCode, SingleValueWireFormat, WireFormat, + NegativeResponseCode, }; const REQUEST_DOWNLOAD_NEGATIVE_RESPONSE_CODES: [NegativeResponseCode; 6] = [ @@ -152,50 +151,6 @@ impl<'a> Decode<'a> for RequestDownloadRequest { } } -impl WireFormat for RequestDownloadRequest { - fn required_size(&self) -> usize { - 2 + self.address_and_length_format_identifier.len() - } - - fn encode(&self, writer: &mut T) -> Result { - writer.write_u8(self.data_format_identifier.into())?; - writer.write_u8(self.address_and_length_format_identifier.into())?; - - writer.write_all(self.get_shortened_memory_address().as_mut_slice())?; - writer.write_all(self.get_shortened_memory_size().as_mut_slice())?; - - Ok(self.required_size()) - } -} - -impl SingleValueWireFormat for RequestDownloadRequest { - fn decode(reader: &mut T) -> Result { - let data_format_identifier = DataFormatIdentifier::from(reader.read_u8()?); - let memory_identifier = MemoryFormatIdentifier::try_from(reader.read_u8()?)?; - - let mut memory_address: Vec = vec![0; memory_identifier.memory_address_length as usize]; - let mut memory_size: Vec = vec![0; memory_identifier.memory_size_length as usize]; - - reader.read_exact(&mut memory_address)?; - reader.read_exact(&mut memory_size)?; - - Ok(Self { - data_format_identifier, - address_and_length_format_identifier: memory_identifier, - memory_address: u64::from_be_bytes({ - let mut bytes = [0; 8]; - bytes[8 - memory_address.len()..].copy_from_slice(&memory_address); - bytes - }), - memory_size: u32::from_be_bytes({ - let mut bytes = [0; 4]; - bytes[4 - memory_size.len()..].copy_from_slice(&memory_size); - bytes - }), - }) - } -} - /// Positive response to a [`RequestDownloadRequest`] indicating the server is ready to receive data. #[cfg_attr(feature = "serde", derive(serde::Deserialize, serde::Serialize))] #[cfg_attr(feature = "utoipa", derive(utoipa::ToSchema))] @@ -219,33 +174,6 @@ impl RequestDownloadResponse { } } -impl WireFormat for RequestDownloadResponse { - fn required_size(&self) -> usize { - 1 + self.max_number_of_block_length.len() - } - - fn encode(&self, writer: &mut T) -> Result { - writer.write_u8(self.length_format_identifier.into())?; - writer.write_all(&self.max_number_of_block_length)?; - Ok(self.required_size()) - } -} - -impl SingleValueWireFormat for RequestDownloadResponse { - fn decode(reader: &mut T) -> Result { - let length_format_identifier = LengthFormatIdentifier::from(reader.read_u8()?); - - let mut max_number_of_block_length: Vec = - vec![0; length_format_identifier.max_number_of_block_length as usize]; - reader.read_exact(&mut max_number_of_block_length)?; - - Ok(Self { - length_format_identifier, - max_number_of_block_length, - }) - } -} - // --------------------------------------------------------------------------- // no_std TX type for RequestDownloadResponse (borrow from caller) // --------------------------------------------------------------------------- diff --git a/src/services/request_file_transfer.rs b/src/services/request_file_transfer.rs index dc57506..03d45bf 100644 --- a/src/services/request_file_transfer.rs +++ b/src/services/request_file_transfer.rs @@ -1,8 +1,6 @@ //! `RequestFileTransfer` (0x38) service implementation -use byteorder_embedded_io::io::{ReadBytesExt, WriteBytesExt}; -use std::io::Read; -use crate::{DataFormatIdentifier, Error, SingleValueWireFormat, WireFormat}; +use crate::{DataFormatIdentifier, Error}; ///////////////////////////////////////// - Request - /////////////////////////////////////////////////// /// Mode of operation for file transfer requests @@ -108,57 +106,6 @@ pub struct SizePayload { pub file_size_compressed: u128, } -impl WireFormat for SizePayload { - fn required_size(&self) -> usize { - 1 + (2 * self.file_size_parameter_length as usize) - } - - fn encode(&self, writer: &mut T) -> Result { - // Always write the file size as 1 byte - writer.write_u8(self.file_size_parameter_length)?; - // write the file size only as many bytes as needed - // Slice off only the number of bytes we need from the end of the file_size bytes - let uncompressed = self.file_size_uncompressed.to_be_bytes(); - let compressed = self.file_size_compressed.to_be_bytes(); - // file_size_uncompressed - let mut bytes: Vec = Vec::new(); - bytes.extend_from_slice(&uncompressed[16 - self.file_size_parameter_length as usize..]); - // file_size_compressed - bytes.extend_from_slice(&compressed[16 - self.file_size_parameter_length as usize..]); - - writer.write_all(&bytes)?; - - Ok(self.required_size()) - } -} - -impl SingleValueWireFormat for SizePayload { - fn decode(reader: &mut T) -> Result { - let file_size_parameter_length = reader.read_u8()?; - let mut file_size_uncompressed = vec![0; file_size_parameter_length as usize]; - let mut file_size_compressed = vec![0; file_size_parameter_length as usize]; - - reader.read_exact(&mut file_size_uncompressed)?; - reader.read_exact(&mut file_size_compressed)?; - - Ok(Self { - file_size_parameter_length, - file_size_uncompressed: u128::from_be_bytes({ - let mut bytes = [0; 16]; - bytes[16 - file_size_parameter_length as usize..] - .copy_from_slice(&file_size_uncompressed); - bytes - }), - file_size_compressed: u128::from_be_bytes({ - let mut bytes = [0; 16]; - bytes[16 - file_size_parameter_length as usize..] - .copy_from_slice(&file_size_compressed); - bytes - }), - }) - } -} - /// Payload used for all [`RequestFileTransfer` requests][RequestFileTransferRequest] /// /// #### ***Request*** Message @@ -189,40 +136,6 @@ pub struct NamePayload { file_path_and_name: String, } -impl WireFormat for NamePayload { - fn required_size(&self) -> usize { - 1 + 2 + self.file_path_and_name.len() - } - - fn encode(&self, writer: &mut T) -> Result { - // Write the mode of operation - writer.write_u8((self.mode_of_operation).into())?; - // Write the file path and name length - writer.write_u16::(self.file_path_and_name_length)?; - // Write the file path and name - writer.write_all(self.file_path_and_name.as_bytes())?; - Ok(self.required_size()) - } -} - -impl SingleValueWireFormat for NamePayload { - fn decode(reader: &mut T) -> Result { - let mode_of_operation = FileOperationMode::try_from(reader.read_u8()?)?; - let file_path_and_name_length = reader.read_u16::()?; - - // Read # of bytes specified by `file_path_and_name_length` - let mut file_path_and_name = String::new(); - reader - .take(u64::from(file_path_and_name_length)) - .read_to_string(&mut file_path_and_name)?; - - Ok(Self { - mode_of_operation, - file_path_and_name_length, - file_path_and_name, - }) - } -} /// A request to the server to transfer a file, either upload or download. /// /// Capabilities: @@ -262,85 +175,6 @@ pub enum RequestFileTransferRequest { ResumeFile(NamePayload, DataFormatIdentifier, SizePayload), } -impl WireFormat for RequestFileTransferRequest { - fn required_size(&self) -> usize { - match self { - Self::AddFile(name_payload, data_format_identifier, file_size_payload) - | Self::ReplaceFile(name_payload, data_format_identifier, file_size_payload) - | Self::ResumeFile(name_payload, data_format_identifier, file_size_payload) => { - name_payload.required_size() - + data_format_identifier.required_size() - + file_size_payload.required_size() - } - Self::ReadFile(name_payload, data_format_identifier) => { - name_payload.required_size() + data_format_identifier.required_size() - } - Self::DeleteFile(name_payload) | Self::ReadDir(name_payload) => { - name_payload.required_size() - } - } - } - - fn encode(&self, writer: &mut T) -> Result { - let mut len = 0; - Ok(match self { - Self::AddFile(name_payload, data_format_identifier, file_size_payload) - | Self::ReplaceFile(name_payload, data_format_identifier, file_size_payload) - | Self::ResumeFile(name_payload, data_format_identifier, file_size_payload) => { - len += name_payload.encode(writer)?; - len += data_format_identifier.encode(writer)?; - len += file_size_payload.encode(writer)?; - len - } - Self::ReadFile(name_payload, data_format_identifier) => { - len += name_payload.encode(writer)?; - len += data_format_identifier.encode(writer)?; - len - } - Self::DeleteFile(name_payload) | Self::ReadDir(name_payload) => { - len += name_payload.encode(writer)?; - len - } - }) - } -} - -impl SingleValueWireFormat for RequestFileTransferRequest { - fn decode(reader: &mut T) -> Result { - let name_payload = NamePayload::decode(reader)?; - - // read the filename - Ok(match name_payload.mode_of_operation { - // Complicated - FileOperationMode::AddFile => Self::AddFile( - name_payload, - DataFormatIdentifier::decode(reader)?, - SizePayload::decode(reader)?, - ), - FileOperationMode::ReplaceFile => Self::ReplaceFile( - name_payload, - DataFormatIdentifier::decode(reader)?, - SizePayload::decode(reader)?, - ), - FileOperationMode::ResumeFile => Self::ResumeFile( - name_payload, - DataFormatIdentifier::decode(reader)?, - SizePayload::decode(reader)?, - ), - FileOperationMode::ReadFile => { - Self::ReadFile(name_payload, DataFormatIdentifier::decode(reader)?) - } - FileOperationMode::ReadDir => Self::ReadDir(name_payload), - FileOperationMode::DeleteFile => Self::DeleteFile(name_payload), - FileOperationMode::ISOSAEReserved(_) => { - return Err(Error::InvalidFileOperationMode( - name_payload.mode_of_operation.into(), - )); - } - }) - } -} - ///////////////////////////////////////// - Response - /////////////////////////////////////////////////// /// Sent by the server to inform the client of the maximum number of bytes to include in each `TransferData` request message @@ -381,31 +215,6 @@ pub struct SentDataPayload { pub max_number_of_block_length: Vec, } -impl WireFormat for SentDataPayload { - fn required_size(&self) -> usize { - 1 + self.max_number_of_block_length.len() - } - - fn encode(&self, writer: &mut T) -> Result { - writer.write_u8(self.length_format_identifier)?; - writer.write_all(&self.max_number_of_block_length)?; - Ok(self.required_size()) - } -} - -impl SingleValueWireFormat for SentDataPayload { - fn decode(reader: &mut T) -> Result { - let length_format_identifier = reader.read_u8()?; - - let mut max_number_of_block_length: Vec = vec![0; length_format_identifier as usize]; - reader.read_exact(&mut max_number_of_block_length)?; - Ok(Self { - length_format_identifier, - max_number_of_block_length, - }) - } -} - /// Used to inform the client of the size of the file to be transferred /// /// | | [AddFile] | [DeleteFile] | [ReplaceFile] | [ReadFile] | [ReadDir] | [ResumeFile] | @@ -432,58 +241,6 @@ pub struct FileSizePayload { pub file_size_compressed: u128, } -impl WireFormat for FileSizePayload { - fn required_size(&self) -> usize { - 2 + (2 * self.file_size_parameter_length as usize) - } - - fn encode(&self, writer: &mut T) -> Result { - // Always write the file size as 1 byte - - writer.write_u16::(self.file_size_parameter_length)?; - // write the file size only as many bytes as needed - // Slice off only the number of bytes we need from the end of the file_size bytes - let uncompressed = self.file_size_uncompressed.to_be_bytes(); - let compressed = self.file_size_compressed.to_be_bytes(); - // file_size_uncompressed - let mut bytes: Vec = Vec::new(); - bytes.extend_from_slice(&uncompressed[16 - self.file_size_parameter_length as usize..]); - // file_size_compressed - bytes.extend_from_slice(&compressed[16 - self.file_size_parameter_length as usize..]); - - writer.write_all(&bytes)?; - - Ok(self.required_size()) - } -} - -impl SingleValueWireFormat for FileSizePayload { - fn decode(reader: &mut T) -> Result { - let file_size_parameter_length = reader.read_u16::()?; - let mut file_size_uncompressed = vec![0; file_size_parameter_length as usize]; - let mut file_size_compressed = vec![0; file_size_parameter_length as usize]; - - reader.read_exact(&mut file_size_uncompressed)?; - reader.read_exact(&mut file_size_compressed)?; - - Ok(Self { - file_size_parameter_length, - file_size_uncompressed: u128::from_be_bytes({ - let mut bytes = [0; 16]; - bytes[16 - file_size_parameter_length as usize..] - .copy_from_slice(&file_size_uncompressed); - bytes - }), - file_size_compressed: u128::from_be_bytes({ - let mut bytes = [0; 16]; - bytes[16 - file_size_parameter_length as usize..] - .copy_from_slice(&file_size_compressed); - bytes - }), - }) - } -} - /// Used to inform the client of the size of the directory to be transferred /// /// | | [AddFile] | [DeleteFile] | [ReplaceFile] | [ReadFile] | [ReadDir] | [ResumeFile] | @@ -507,46 +264,6 @@ pub struct DirSizePayload { pub dir_info_length: u128, } -impl WireFormat for DirSizePayload { - fn required_size(&self) -> usize { - 2 + self.dir_info_parameter_length as usize - } - - fn encode(&self, writer: &mut T) -> Result { - let mut len = 0; - writer.write_u16::(self.dir_info_parameter_length)?; - len += 2; - // write the file size only as many bytes as needed - // Slice off only the number of bytes we need from the end of the file_size bytes - let dir_info_length = self.dir_info_length.to_be_bytes(); - let mut bytes: Vec = Vec::new(); - - bytes.extend_from_slice(&dir_info_length[16 - self.dir_info_parameter_length as usize..]); - writer.write_all(&bytes)?; - - len += bytes.len(); - - Ok(len) - } -} - -impl SingleValueWireFormat for DirSizePayload { - fn decode(reader: &mut T) -> Result { - let dir_info_parameter_length = reader.read_u16::()?; - let mut dir_info_length = vec![0; dir_info_parameter_length as usize]; - reader.read_exact(&mut dir_info_length)?; - - Ok(Self { - dir_info_parameter_length, - dir_info_length: u128::from_be_bytes({ - let mut bytes = [0; 16]; - bytes[16 - dir_info_parameter_length as usize..].copy_from_slice(&dir_info_length); - bytes - }), - }) - } -} - /// Used to inform the client of the byte position within the file at which the Tester will resume downloading after an initial download is suspended /// /// | | [AddFile] | [DeleteFile] | [ReplaceFile] | [ReadFile] | [ReadDir] | [ResumeFile] | @@ -575,26 +292,6 @@ pub struct PositionPayload { pub file_position: u64, } -impl WireFormat for PositionPayload { - // For PositionPayload - fn required_size(&self) -> usize { - 8 - } - - fn encode(&self, writer: &mut T) -> Result { - writer.write_u64::(self.file_position)?; - Ok(8) - } -} - -impl SingleValueWireFormat for PositionPayload { - fn decode(reader: &mut T) -> Result { - Ok(Self { - file_position: reader.read_u64::()?, - }) - } -} - /// Response to a [`RequestFileTransferRequest`] from the server /// /// The server will respond with a [`RequestFileTransferResponse`] to indicate the status of the request @@ -633,125 +330,6 @@ pub enum RequestFileTransferResponse { ), } -impl WireFormat for RequestFileTransferResponse { - // For RequestFileTransferResponse - fn required_size(&self) -> usize { - match self { - Self::AddFile(_, sent_data, data_format) - | Self::ReplaceFile(_, sent_data, data_format) => { - 1 + sent_data.required_size() + data_format.required_size() - } - Self::DeleteFile(_) => 1, - Self::ReadFile(_, sent_data, data_format, file_size) => { - 1 + sent_data.required_size() - + data_format.required_size() - + file_size.required_size() - } - Self::ReadDir(_, sent_data, data_format, dir_size) => { - 1 + sent_data.required_size() - + data_format.required_size() - + dir_size.required_size() - } - Self::ResumeFile(_, sent_data, data_format, position) => { - 1 + sent_data.required_size() - + data_format.required_size() - + position.required_size() - } - } - } - fn encode(&self, writer: &mut T) -> Result { - // Every variant has a mode of operation - let mut len = 1; - - match self { - Self::AddFile(mode_of_operation, sent_data_payload, data_format_identifier) - | Self::ReplaceFile(mode_of_operation, sent_data_payload, data_format_identifier) => { - writer.write_u8((*mode_of_operation).into())?; - len += sent_data_payload.encode(writer)?; - len += data_format_identifier.encode(writer)?; - } - Self::DeleteFile(mode_of_operation) => { - writer.write_u8((*mode_of_operation).into())?; - } - Self::ReadFile( - mode_of_operation, - sent_data_payload, - data_format_identifier, - size_payload, - ) => { - writer.write_u8((*mode_of_operation).into())?; - len += sent_data_payload.encode(writer)?; - len += data_format_identifier.encode(writer)?; - len += size_payload.encode(writer)?; - } - Self::ReadDir( - mode_of_operation, - sent_data_payload, - data_format_identifier, - dir_size_payload, - ) => { - writer.write_u8((*mode_of_operation).into())?; - len += sent_data_payload.encode(writer)?; - len += data_format_identifier.encode(writer)?; - len += dir_size_payload.encode(writer)?; - } - Self::ResumeFile( - mode_of_operation, - sent_data_payload, - data_format_identifier, - position_payload, - ) => { - writer.write_u8((*mode_of_operation).into())?; - len += sent_data_payload.encode(writer)?; - len += data_format_identifier.encode(writer)?; - len += position_payload.encode(writer)?; - } - } - Ok(len) - } -} - -impl SingleValueWireFormat for RequestFileTransferResponse { - fn decode(reader: &mut T) -> Result { - // Read the mode of operation - let mode_of_operation = FileOperationMode::try_from(reader.read_u8()?)?; - Ok(match mode_of_operation { - FileOperationMode::AddFile => Self::AddFile( - mode_of_operation, - SentDataPayload::decode(reader)?, - DataFormatIdentifier::decode(reader)?, - ), - FileOperationMode::DeleteFile => Self::DeleteFile(mode_of_operation), - FileOperationMode::ReplaceFile => Self::ReplaceFile( - mode_of_operation, - SentDataPayload::decode(reader)?, - DataFormatIdentifier::decode(reader)?, - ), - FileOperationMode::ReadFile => Self::ReadFile( - mode_of_operation, - SentDataPayload::decode(reader)?, - DataFormatIdentifier::decode(reader)?, - FileSizePayload::decode(reader)?, - ), - FileOperationMode::ReadDir => Self::ReadDir( - mode_of_operation, - SentDataPayload::decode(reader)?, - DataFormatIdentifier::decode(reader)?, - DirSizePayload::decode(reader)?, - ), - FileOperationMode::ResumeFile => Self::ResumeFile( - mode_of_operation, - SentDataPayload::decode(reader)?, - DataFormatIdentifier::decode(reader)?, - PositionPayload::decode(reader)?, - ), - FileOperationMode::ISOSAEReserved(_) => { - return Err(Error::InvalidFileOperationMode(mode_of_operation.into())); - } - }) - } -} - #[cfg(test)] mod request_tests { use super::*; diff --git a/src/services/routine_control.rs b/src/services/routine_control.rs index c03ae7e..aeabc22 100644 --- a/src/services/routine_control.rs +++ b/src/services/routine_control.rs @@ -1,13 +1,10 @@ //! Routine Control (0x31) Service is used to perform functions on the ECU that are may not be covered by other services. //! -//! It can also be used to check the ECU’s health, erase memory, or other custom manufacturer/supplier routines. +//! It can also be used to check the ECU's health, erase memory, or other custom manufacturer/supplier routines. //! However, some routines may have side effects or require certain preconditions to be met. use crate::{ - Error, Identifier, IterableWireFormat, RoutineControlSubFunction, SingleValueWireFormat, - WireFormat, + Encode, Error, Identifier, RoutineControlSubFunction, }; -use byteorder_embedded_io::io::{ReadBytesExt, WriteBytesExt}; -use std::io::{Read, Write}; /// Used by a client to execute a defined sequence of events and obtain any relevant results #[cfg_attr(feature = "serde", derive(serde::Deserialize, serde::Serialize))] @@ -23,13 +20,11 @@ pub struct RoutineControlRequest { pub data: Option, } -impl - RoutineControlRequest -{ +impl RoutineControlRequest { pub(crate) fn new( sub_function: RoutineControlSubFunction, - routine_id: RoutineIdentifier, - data: Option, + routine_id: RI, + data: Option, ) -> Self { Self { sub_function, @@ -39,38 +34,20 @@ impl } } -impl WireFormat - for RoutineControlRequest -{ - fn required_size(&self) -> usize { - 3 + match &self.data { - Some(record) => record.required_size(), - None => 0, - } +impl Encode for RoutineControlRequest { + fn encoded_size(&self) -> usize { + 1 + 2 + self.data.as_ref().map_or(0, Encode::encoded_size) } - fn encode(&self, writer: &mut T) -> Result { - writer.write_u8(u8::from(self.sub_function))?; - self.routine_id.encode(writer)?; - if let Some(record) = &self.data { - record.encode(writer)?; + fn encode(&self, writer: &mut impl embedded_io::Write) -> Result { + writer + .write_all(&[u8::from(self.sub_function)]) + .map_err(Error::io)?; + Encode::encode(&self.routine_id, writer)?; + if let Some(payload) = &self.data { + Encode::encode(payload, writer)?; } - Ok(self.required_size()) - } -} - -impl SingleValueWireFormat - for RoutineControlRequest -{ - fn decode(reader: &mut T) -> Result { - let sub_function = RoutineControlSubFunction::try_from(reader.read_u8()?)?; - let routine_id = RoutineIdentifier::decode(reader)?; - let data = RoutinePayload::decode_next(reader)?; - Ok(Self { - sub_function, - routine_id, - data, - }) + Ok(self.encoded_size()) } } @@ -84,143 +61,31 @@ pub struct RoutineControlResponse { pub routine_control_type: RoutineControlSubFunction, /// Should contain the `routine_info` (u8) and the `routine_status_record` (u8 * n) information. n can be 0 - /// - /// `routine_info`: The routine information that the response is for (vehicle manufacturer specific) - /// `routine_status_record`: The status of the routine (optional) - /// - /// Mandatory for any routine where the `routine_status_record` is defined by ISO/SAE specs, even if it is 0 bytes. - /// Optional if the routine is defined by a manufacturer. pub routine_status_record: RoutineInfoStatusRecord, } -impl RoutineControlResponse { +impl RoutineControlResponse { pub(crate) fn new( routine_control_type: RoutineControlSubFunction, - data: RoutineStatusRecord, + routine_status_record: RSR, ) -> Self { Self { - routine_control_type, - routine_status_record: data, - } - } - - /// Get the raw data of the status record - /// # Errors - /// - if the stream is not in the expected format - /// - if the stream contains partial data - pub fn status_record_data(&self) -> Result, Error> { - let mut writer: Vec = Vec::new(); - self.routine_status_record.encode(&mut writer)?; - - Ok(writer) - } -} - -impl WireFormat for RoutineControlResponse { - fn required_size(&self) -> usize { - // control type + (routine identifier + routine info + status record) - 1 + self.routine_status_record.required_size() - } - - fn encode(&self, writer: &mut T) -> Result { - writer.write_u8(self.routine_control_type.into())?; - self.routine_status_record.encode(writer)?; - Ok(self.required_size()) - } -} - -impl SingleValueWireFormat - for RoutineControlResponse -{ - fn decode(reader: &mut T) -> Result { - let routine_control_type = RoutineControlSubFunction::try_from(reader.read_u8()?)?; - // Reads the identifier, then can read 0 bytes, 1 byte, or more - let routine_status_record = RoutineStatusRecord::decode(reader)?; - Ok(Self { routine_control_type, routine_status_record, - }) - } -} - -#[cfg(test)] -mod request { - use super::*; - use crate::impl_identifier; - - #[cfg_attr(feature = "serde", derive(serde::Deserialize, serde::Serialize))] - #[derive(Clone, Copy, Debug, Eq, PartialEq)] - struct TestIdentifier(pub u16); - impl_identifier!(TestIdentifier); - - impl From for TestIdentifier { - fn from(value: u16) -> Self { - TestIdentifier(value) } } +} - impl From for u16 { - fn from(val: TestIdentifier) -> Self { - val.0 - } - } - - type RoutineControlRequestType = RoutineControlRequest>; - - #[test] - fn simple_request() { - // Fake data: StartRoutine, RoutineID of 0x8606 for "Start O2 Sensor Heater Test" or something - let bytes: [u8; 6] = [0x01, 0x00, 0x01, 0x02, 0x03, 0x04]; - let req: RoutineControlRequestType = - RoutineControlRequest::decode(&mut bytes.as_slice()).unwrap(); - - assert_eq!(u8::from(req.sub_function), 0x01); - assert_eq!(req.routine_id, TestIdentifier::from(0x0001)); - let data = req.data.clone().unwrap(); - assert_eq!(data, vec![0x02, 0x03, 0x04]); - - let mut buf = Vec::new(); - let written = req.encode(&mut buf).unwrap(); - assert_eq!(written, bytes.len()); - assert_eq!(written, req.required_size()); - - let new_req: RoutineControlRequestType = RoutineControlRequest::new( - RoutineControlSubFunction::StopRoutine, - TestIdentifier::from(0x0002), - Some(vec![]), - ); - - assert_eq!(new_req.sub_function, RoutineControlSubFunction::StopRoutine); - assert_eq!(new_req.routine_id, TestIdentifier::from(0x0002)); +impl Encode for RoutineControlResponse { + fn encoded_size(&self) -> usize { + 1 + self.routine_status_record.encoded_size() } - #[test] - fn simple_response() { - let bytes: [u8; 6] = [0x01, 0x00, 0x01, 0x02, 0x03, 0x04]; - let resp: RoutineControlResponse> = - RoutineControlResponse::decode(&mut bytes.as_slice()).unwrap(); - - assert_eq!( - resp.routine_control_type, - RoutineControlSubFunction::StartRoutine - ); - // Vec as payload just reads until the end, including the identifier - assert_eq!( - resp.routine_status_record, - vec![0x00, 0x01, 0x02, 0x03, 0x04] - ); - - let mut buf = Vec::new(); - let written = resp.encode(&mut buf).unwrap(); - assert_eq!(written, bytes.len()); - assert_eq!(written, resp.required_size()); - - let new_resp: RoutineControlResponse> = - RoutineControlResponse::new(RoutineControlSubFunction::StopRoutine, buf); - - assert_eq!( - new_resp.routine_control_type, - RoutineControlSubFunction::StopRoutine - ); + fn encode(&self, writer: &mut impl embedded_io::Write) -> Result { + writer + .write_all(&[u8::from(self.routine_control_type)]) + .map_err(Error::io)?; + Encode::encode(&self.routine_status_record, writer)?; + Ok(self.encoded_size()) } } diff --git a/src/services/security_access.rs b/src/services/security_access.rs index 145a9d0..9e9ed3c 100644 --- a/src/services/security_access.rs +++ b/src/services/security_access.rs @@ -1,10 +1,7 @@ //! `SecurityAccess` (0x27) service implementation use crate::{ - Decode, Encode, Error, NegativeResponseCode, SecurityAccessType, SingleValueWireFormat, - SuppressablePositiveResponse, WireFormat, + Decode, Encode, Error, NegativeResponseCode, SecurityAccessType, SuppressablePositiveResponse, }; -use byteorder_embedded_io::io::{ReadBytesExt, WriteBytesExt}; -use std::io::{Read, Write}; /// List of allowed [`NegativeResponseCode`] variants for the `SecurityAccess` service const SECURITY_ACCESS_NEGATIVE_RESPONSE_CODES: [NegativeResponseCode; 8] = [ @@ -84,34 +81,6 @@ impl SecurityAccessRequest { } } -impl WireFormat for SecurityAccessRequest { - fn required_size(&self) -> usize { - 1 + self.request_data().len() - } - - fn encode(&self, writer: &mut T) -> Result { - writer.write_u8(u8::from(self.access_type))?; - writer.write_all(&self.request_data)?; - Ok(self.required_size()) - } - - fn is_positive_response_suppressed(&self) -> bool { - self.suppress_positive_response() - } -} - -impl SingleValueWireFormat for SecurityAccessRequest { - fn decode(reader: &mut T) -> Result { - let access_type = SuppressablePositiveResponse::try_from(reader.read_u8()?)?; - let mut request_data: Vec = Vec::new(); - _ = reader.read_to_end(&mut request_data)?; - Ok(Self { - access_type, - request_data, - }) - } -} - /// Response to `SecurityAccessRequest` /// /// ## Request Seed @@ -142,30 +111,6 @@ impl SecurityAccessResponse { } } -impl WireFormat for SecurityAccessResponse { - fn required_size(&self) -> usize { - 1 + self.security_seed.len() - } - - fn encode(&self, writer: &mut T) -> Result { - writer.write_u8(u8::from(self.access_type))?; - writer.write_all(&self.security_seed)?; - Ok(self.required_size()) - } -} - -impl SingleValueWireFormat for SecurityAccessResponse { - fn decode(reader: &mut T) -> Result { - let access_type = SecurityAccessType::try_from(reader.read_u8()?)?; - let mut security_seed = Vec::new(); - let _ = reader.read_to_end(&mut security_seed)?; - Ok(Self { - access_type, - security_seed, - }) - } -} - // --------------------------------------------------------------------------- // no_std TX types (borrow from caller) // --------------------------------------------------------------------------- diff --git a/src/services/tester_present.rs b/src/services/tester_present.rs index b8c7287..5df29d0 100644 --- a/src/services/tester_present.rs +++ b/src/services/tester_present.rs @@ -1,11 +1,8 @@ //! `TesterPresent` (0x3E) service implementation use crate::{ - Decode, Encode, Error, NegativeResponseCode, SingleValueWireFormat, - SuppressablePositiveResponse, WireFormat, + Decode, Encode, Error, NegativeResponseCode, SuppressablePositiveResponse, }; -use byteorder_embedded_io::io::{ReadBytesExt, WriteBytesExt}; - const TESTER_PRESENT_NEGATIVE_RESPONSE_CODES: [NegativeResponseCode; 2] = [ NegativeResponseCode::SubFunctionNotSupported, NegativeResponseCode::IncorrectMessageLengthOrInvalidFormat, @@ -128,28 +125,6 @@ impl<'a> Decode<'a> for TesterPresentRequest { } } -impl WireFormat for TesterPresentRequest { - fn required_size(&self) -> usize { - 1 - } - - fn encode(&self, writer: &mut T) -> Result { - writer.write_u8(u8::from(self.zero_sub_function))?; - Ok(1) - } - - fn is_positive_response_suppressed(&self) -> bool { - self.suppress_positive_response() - } -} - -impl SingleValueWireFormat for TesterPresentRequest { - fn decode(reader: &mut T) -> Result { - let zero_sub_function = SuppressablePositiveResponse::try_from(reader.read_u8()?)?; - Ok(Self { zero_sub_function }) - } -} - /// Positive response to a `TesterPresentRequest` #[cfg_attr(feature = "serde", derive(serde::Deserialize, serde::Serialize))] #[cfg_attr(feature = "utoipa", derive(utoipa::ToSchema))] @@ -191,24 +166,6 @@ impl<'a> Decode<'a> for TesterPresentResponse { } } -impl WireFormat for TesterPresentResponse { - fn required_size(&self) -> usize { - 1 - } - - fn encode(&self, writer: &mut T) -> Result { - writer.write_u8(u8::from(self.zero_sub_function))?; - Ok(1) - } -} - -impl SingleValueWireFormat for TesterPresentResponse { - fn decode(reader: &mut T) -> Result { - let zero_sub_function = ZeroSubFunction::try_from(reader.read_u8()?)?; - Ok(Self { zero_sub_function }) - } -} - #[cfg(test)] mod test { use super::*; diff --git a/src/services/transfer_data.rs b/src/services/transfer_data.rs index e5b169a..822cec3 100644 --- a/src/services/transfer_data.rs +++ b/src/services/transfer_data.rs @@ -1,7 +1,6 @@ //! `TransferData` (0x36) service implementation -use byteorder_embedded_io::io::{ReadBytesExt, WriteBytesExt}; -use crate::{Decode, Encode, Error, SingleValueWireFormat, WireFormat}; +use crate::{Decode, Encode, Error}; /// A request to the server to transfer data (either upload or download) /// @@ -44,30 +43,6 @@ impl TransferDataRequest { } } -impl WireFormat for TransferDataRequest { - fn required_size(&self) -> usize { - 1 + self.data.len() - } - - fn encode(&self, writer: &mut T) -> Result { - writer.write_u8(self.block_sequence_counter)?; - writer.write_all(&self.data)?; - Ok(self.required_size()) - } -} - -impl SingleValueWireFormat for TransferDataRequest { - fn decode(reader: &mut T) -> Result { - let block_sequence_counter = reader.read_u8()?; - let mut data = Vec::new(); - reader.read_to_end(&mut data)?; - Ok(Self { - block_sequence_counter, - data, - }) - } -} - /// Positive response to a [`TransferDataRequest`]. #[cfg_attr(feature = "serde", derive(serde::Deserialize, serde::Serialize))] #[cfg_attr(feature = "utoipa", derive(utoipa::ToSchema))] @@ -101,30 +76,6 @@ impl TransferDataResponse { } } -impl WireFormat for TransferDataResponse { - fn required_size(&self) -> usize { - 1 + self.data.len() - } - - fn encode(&self, writer: &mut T) -> Result { - writer.write_u8(self.block_sequence_counter)?; - writer.write_all(&self.data)?; - Ok(self.required_size()) - } -} - -impl SingleValueWireFormat for TransferDataResponse { - fn decode(reader: &mut T) -> Result { - let block_sequence_counter = reader.read_u8()?; - let mut data = Vec::new(); - reader.read_to_end(&mut data)?; - Ok(Self { - block_sequence_counter, - data, - }) - } -} - // --------------------------------------------------------------------------- // no_std TX types (borrow from caller) // --------------------------------------------------------------------------- diff --git a/src/services/write_data_by_identifier.rs b/src/services/write_data_by_identifier.rs index 710021c..5a4b479 100644 --- a/src/services/write_data_by_identifier.rs +++ b/src/services/write_data_by_identifier.rs @@ -1,5 +1,5 @@ //! `WriteDataByIdentifier` (0x2E) service implementation -use crate::{Error, Identifier, NegativeResponseCode, SingleValueWireFormat, WireFormat}; +use crate::{Encode, Error, Identifier, NegativeResponseCode}; const WRITE_DID_NEGATIVE_RESPONSE_CODES: [NegativeResponseCode; 5] = [ NegativeResponseCode::IncorrectMessageLengthOrInvalidFormat, @@ -19,39 +19,23 @@ pub struct WriteDataByIdentifierRequest { pub payload: Payload, } -impl WriteDataByIdentifierRequest { - /// Create a new request with the given payload. +impl WriteDataByIdentifierRequest { + /// Create a new write-by-identifier request. pub fn new(payload: Payload) -> Self { Self { payload } } - - /// Get the allowed Nack codes for this request - #[must_use] - pub fn allowed_nack_codes() -> &'static [NegativeResponseCode] { - &WRITE_DID_NEGATIVE_RESPONSE_CODES - } } -impl WireFormat for WriteDataByIdentifierRequest { - fn required_size(&self) -> usize { - self.payload.required_size() +impl Encode for WriteDataByIdentifierRequest { + fn encoded_size(&self) -> usize { + self.payload.encoded_size() } - fn encode(&self, writer: &mut T) -> Result { - // Payload must implement the extra bytes, because `decode` needs to know how to interpret payload message + fn encode(&self, writer: &mut impl embedded_io::Write) -> Result { self.payload.encode(writer) } } -impl SingleValueWireFormat - for WriteDataByIdentifierRequest -{ - fn decode(reader: &mut R) -> Result { - let payload = Payload::decode(reader)?; - Ok(Self { payload }) - } -} - /////////////////////////////////////////////////////////////////////////////////////////////////// /// See ISO-14229-1:2020, Section 11.7.3.1 @@ -71,134 +55,59 @@ impl WriteDataByIdentifierResponse { } } -impl WireFormat for WriteDataByIdentifierResponse { - fn required_size(&self) -> usize { - self.identifier.required_size() +impl Encode for WriteDataByIdentifierResponse { + fn encoded_size(&self) -> usize { + 2 } - fn encode(&self, writer: &mut T) -> Result { - // Payload must implement the extra bytes, because `decode` needs to know how to interpret payload message - self.identifier.encode(writer) + fn encode(&self, writer: &mut impl embedded_io::Write) -> Result { + Encode::encode(&self.identifier, writer) } } -impl SingleValueWireFormat - for WriteDataByIdentifierResponse -{ - fn decode(reader: &mut R) -> Result { - let identifier = DataIdentifier::decode(reader)?; - Ok(Self::new(identifier)) - } -} -/////////////////////////////////////////////////////////////////////////////////////////////////// - #[cfg(test)] mod test { use super::*; - use crate::impl_identifier; - use byteorder_embedded_io::io::WriteBytesExt; + use crate::{ProtocolPayloadTx, UDSIdentifier, impl_identifier}; - #[cfg_attr(feature = "serde", derive(serde::Deserialize, serde::Serialize))] - #[derive(Clone, Copy, Debug, PartialEq)] - pub enum TestIdentifier { - Abracadabra = 0xBEEF, - } - impl_identifier!(TestIdentifier); - impl From for TestIdentifier { - fn from(value: u16) -> Self { - match value { - 0xBEEF => TestIdentifier::Abracadabra, - _ => panic!("Invalid test identifier: {value}"), - } - } - } - - impl From for u16 { - fn from(value: TestIdentifier) -> Self { - match value { - TestIdentifier::Abracadabra => 0xBEEF, - } - } - } - - impl PartialEq for TestIdentifier { - fn eq(&self, other: &u16) -> bool { - match self { - TestIdentifier::Abracadabra => *other == 0xBEEF, - } + #[test] + fn test_write_response_encode() { + #[cfg_attr(feature = "serde", derive(serde::Deserialize, serde::Serialize))] + #[derive(Clone, Copy, Debug, PartialEq)] + pub enum TestIdentifier { + Abracadabra = 0xBEEF, } - } - - /////////////////////////////////////////////////////////////////////////////////////////////// - - #[cfg_attr(feature = "serde", derive(serde::Deserialize, serde::Serialize))] - #[derive(Clone, Copy, Debug, PartialEq)] - enum TestPayload { - Abracadabra(u8), - } - - impl WireFormat for TestPayload { - fn encode(&self, writer: &mut T) -> Result { - let id_bytes: u16 = match self { - TestPayload::Abracadabra(_) => 0xBEEF, - }; - - writer.write_all(&id_bytes.to_be_bytes())?; - - match self { - TestPayload::Abracadabra(value) => { - writer.write_u8(*value)?; - Ok(self.required_size()) + impl_identifier!(TestIdentifier); + impl From for TestIdentifier { + fn from(value: u16) -> Self { + match value { + 0xBEEF => TestIdentifier::Abracadabra, + _ => panic!("Invalid test identifier: {value}"), } } } - - fn required_size(&self) -> usize { - 3 - } - } - - impl SingleValueWireFormat for TestPayload { - fn decode(reader: &mut T) -> Result { - let mut buf = [0u8; 2]; - reader.read_exact(&mut buf)?; - - let value = u16::from_be_bytes(buf); - - if value == TestIdentifier::Abracadabra as u16 { - let mut byte = [0u8; 1]; - reader.read_exact(&mut byte)?; - Ok(TestPayload::Abracadabra(byte[0])) - } else { - Err(Error::NoDataAvailable) + impl From for u16 { + fn from(value: TestIdentifier) -> Self { + match value { + TestIdentifier::Abracadabra => 0xBEEF, + } } } - } - - /////////////////////////////////////////////////////////////////////////////////////////////// - - #[test] - fn test_write_request() { - let request = WriteDataByIdentifierRequest::new(TestPayload::Abracadabra(42)); - - let mut written_bytes = Vec::new(); - let written = request.encode(&mut written_bytes).unwrap(); - assert_eq!(written, request.required_size()); - assert_eq!(written, written_bytes.len()); - let request2 = - WriteDataByIdentifierRequest::::decode(&mut written_bytes.as_slice()) - .unwrap(); - assert_eq!(request, request2); + let response = WriteDataByIdentifierResponse::new(TestIdentifier::Abracadabra); + let mut buf = [0u8; 4]; + let written = Encode::encode(&response, &mut buf.as_mut_slice()).unwrap(); + assert_eq!(written, 2); + assert_eq!(buf[0], 0xBE); + assert_eq!(buf[1], 0xEF); } #[test] - fn test_write_response() { - let response = WriteDataByIdentifierResponse::new(TestIdentifier::Abracadabra); - - let mut written_bytes = Vec::new(); - let written = response.encode(&mut written_bytes).unwrap(); - assert_eq!(written, written_bytes.len()); - assert_eq!(written, response.required_size()); + fn test_write_request_encode() { + let payload = ProtocolPayloadTx::new(UDSIdentifier::ActiveDiagnosticSession, &[0x01]); + let request = WriteDataByIdentifierRequest::new(payload); + let mut buf = [0u8; 8]; + let written = Encode::encode(&request, &mut buf.as_mut_slice()).unwrap(); + assert_eq!(written, 3); } } diff --git a/src/traits.rs b/src/traits.rs index e8e6b56..1efe729 100644 --- a/src/traits.rs +++ b/src/traits.rs @@ -1,14 +1,10 @@ use crate::Error; -use byteorder_embedded_io::BigEndian; -use byteorder_embedded_io::io::WriteBytesExt; // --------------------------------------------------------------------------- // New no_std-compatible traits (TX: Encode, RX: Decode / DecodeIter) // --------------------------------------------------------------------------- /// TX-side trait: encode a value into an [`embedded_io::Write`] implementor. -/// -/// This is the `no_std` replacement for the encoding half of [`WireFormat`]. pub trait Encode { /// Number of bytes this value will write. fn encoded_size(&self) -> usize; @@ -53,159 +49,10 @@ pub trait DecodeIter<'a>: Sized { fn decode_next(buf: &'a [u8]) -> Result, Error>; } -/// Base trait for types that can be serialized to a byte stream. -/// -/// `WireFormat` provides the encoding half of the serialization contract. -/// Decoding is split into two separate traits with distinct return types: -/// - [`SingleValueWireFormat`] for types whose decode always produces a value -/// - [`IterableWireFormat`] for types that may return `None` when a stream is exhausted -/// -/// This split enforces at compile time the distinction between types that always -/// decode successfully (given valid data) and types that can signal "no more items." -#[deprecated(note = "use `Encode` instead for the TX path")] -pub trait WireFormat: Sized { - /// Returns the number of bytes required to serialize this value. - fn required_size(&self) -> usize; - - /// Serialize a value to a byte stream. - /// Returns the number of bytes written. - /// # Errors - /// - If the data cannot be written to the stream - fn encode(&self, writer: &mut T) -> Result; - - /// For some UDS messages, positive replies can be suppressed via the SPRMIB (bit 7 position) of the request. - /// - /// Default to false, meaning that the positive response is not suppressed. Some services do not support this feature, - /// so this function should not be used to assume that a positive response can be suppressed. - fn is_positive_response_suppressed(&self) -> bool { - false - } -} - -/// Types whose decode always produces a value. An empty stream is an error, not `None`. -/// -/// This trait enforces at compile time that `decode` cannot return `None`. -/// The return type is `Result` rather than `Result, Error>`. -#[deprecated(note = "use `Decode` instead for the RX path")] -pub trait SingleValueWireFormat: WireFormat { - /// Deserialize a value from a byte stream. - /// # Errors - /// - if the stream is empty - /// - if the stream is not in the expected format - /// - if the stream contains partial data - fn decode(reader: &mut T) -> Result; -} - -struct WireFormatIterator<'a, T, R> { - reader: &'a mut R, - _phantom: std::marker::PhantomData, -} - -/// For types that can appear in lists of unknown length, this trait provides an iterator -/// that can be used to deserialize a stream of values. -impl Iterator for WireFormatIterator<'_, T, R> { - type Item = Result; - fn next(&mut self) -> Option { - match T::decode_next(self.reader.by_ref()) { - Ok(Some(value)) => Some(Ok(value)), - Ok(None) => None, - Err(e) => Some(Err(e)), - } - } -} - -/// Types that can be decoded from a stream of unknown length. -/// -/// `decode_next` returns `Ok(None)` when the stream is exhausted, allowing -/// iteration over variable-length sequences without prior knowledge of their size. -#[deprecated(note = "use `DecodeIter` instead for the RX path")] -pub trait IterableWireFormat: WireFormat { - /// Attempt to decode the next value from the stream. - /// Returns `Ok(None)` if the stream is exhausted. - /// # Errors - /// - if the stream contains partial or invalid data - fn decode_next(reader: &mut T) -> Result, Error>; - - /// Return an iterator that decodes successive values from the stream until exhausted. - fn decode_iter(reader: &mut T) -> impl Iterator> { - WireFormatIterator { - reader, - _phantom: std::marker::PhantomData, - } - } -} - -#[cfg(feature = "serde")] -mod maybe_serde { - // When `serde` feature is ON, require Serialize + Deserialize - pub trait Bound: serde::Serialize + for<'de> serde::Deserialize<'de> {} - impl Bound for T where T: serde::Serialize + for<'de> serde::Deserialize<'de> {} -} -#[cfg(not(feature = "serde"))] -mod maybe_serde { - // When `serde` feature is OFF, require nothing - pub trait Bound {} - impl Bound for T {} -} - -#[cfg(feature = "utoipa")] -mod maybe_utoipa { - // When `utoipa` feature is ON, require ToSchema - pub trait Bound: utoipa::ToSchema {} - impl Bound for T where T: utoipa::ToSchema {} -} - -#[cfg(not(feature = "utoipa"))] -mod maybe_utoipa { - // When `utoipa` feature is OFF, require nothing - pub trait Bound {} - impl Bound for T {} -} - /// Trait for types that can be used as identifiers (ie Data Identifiers and Routine Identifiers) /// /// Use the [`impl_identifier!`] macro to implement this trait for your types. -pub trait Identifier: TryFrom + Into + Clone + Copy + maybe_serde::Bound { - /// Returns a `Vec` from a reader that contains a list of Identifier values - /// # Errors - /// - if the list is not in the expected format - /// - if the list contains partial data - fn parse_from_list(reader: &mut R) -> Result, Error> { - // Create an iterator to collect. Will use the blanket implementation of IterableWireFormat for Identifier - // to read the values from the reader - WireFormatIterator { - reader, - _phantom: std::marker::PhantomData, - } - .collect() - } - - /// Intended to be used in a payload where the identifier is the first value and not a list of identifiers - /// IE `DataIdentifer` (DID) payloads and `RoutineIdentifier` (RID) payloads - /// - /// Returns the identifier, or None if the reader is empty - /// - /// ## Example reading a payload that has multiple identifiers - /// ```rust,ignore - /// while let Some(identifier) = MyIdentifier::parse_from_payload(&mut buffer).unwrap() { - /// match identifier { - /// MyIdentifier::Identifier1 | MyIdentifier::Identifier2 => { - /// let payload = MyPayload::decode(&mut buffer).unwrap(); - /// } - /// // No payload for Identifier3 - /// MyIdentifier::MyIdentifier3 => (), - /// MyIdentifier::UDSIdentifier(_) => (), - /// } - /// } - /// ``` - /// - /// # Errors - /// - if the stream is not in the expected format - /// - if the stream contains partial data - fn parse_from_payload(reader: &mut R) -> Result, Error> { - ::decode_next(reader) - } -} +pub trait Identifier: TryFrom + Into + Clone + Copy {} /// Implement the [`Identifier`] trait for a type. /// @@ -275,75 +122,12 @@ where } } -/// Blanket implementation of [`WireFormat`] for types that implement [`Identifier`] -impl WireFormat for T -where - T: Identifier, -{ - fn required_size(&self) -> usize { - 2 - } - - fn encode(&self, writer: &mut W) -> Result { - writer.write_u16::((*self).into())?; - Ok(2) - } -} - -/// Blanket implementation of [`SingleValueWireFormat`] for types that implement [`Identifier`] -impl SingleValueWireFormat for T -where - T: Identifier, -{ - fn decode(reader: &mut R) -> Result { - let mut identifier_data: [u8; 2] = [0; 2]; - match reader.read(&mut identifier_data)? { - 0 | 1 => return Err(Error::IncorrectMessageLengthOrInvalidFormat), - 2 => (), - _ => unreachable!("Impossible to read more than 2 bytes into 2 byte array"), - } - - match Self::try_from(u16::from_be_bytes(identifier_data)) { - Ok(identifier) => Ok(identifier), - Err(_) => Err(Error::InvalidDiagnosticIdentifier(u16::from_be_bytes( - identifier_data, - ))), - } - } -} - -/// Blanket implementation of [`IterableWireFormat`] for types that implement [`Identifier`] -impl IterableWireFormat for T -where - T: Identifier, -{ - fn decode_next(reader: &mut R) -> Result, Error> { - let mut identifier_data: [u8; 2] = [0; 2]; - match reader.read(&mut identifier_data)? { - 0 => return Ok(None), - 1 => return Err(Error::IncorrectMessageLengthOrInvalidFormat), - 2 => (), - _ => unreachable!("Impossible to read more than 2 bytes into 2 byte array"), - } - - match Self::try_from(u16::from_be_bytes(identifier_data)) { - Ok(identifier) => Ok(Some(identifier)), - Err(_) => Err(Error::InvalidDiagnosticIdentifier(u16::from_be_bytes( - identifier_data, - ))), - } - } -} - -/// `no_std`-compatible trait for TX-side diagnostic definitions. -/// -/// Specifies the identifier and payload types used when *constructing* UDS -/// requests and responses. Associated types implement [`Encode`] rather than -/// the `std`-dependent [`WireFormat`] / [`SingleValueWireFormat`] traits. -pub trait DiagnosticDefinitionTx: 'static { +/// Trait for diagnostic definitions that specifies the identifier and payload +/// types used when constructing and parsing UDS requests and responses. +pub trait DiagnosticDefinition: 'static { /// UDS Data Identifier type. type DID: Identifier + Clone + core::fmt::Debug + PartialEq + 'static; - /// Payload type for [`ReadDataByIdentifierRequestTx`](crate::ReadDataByIdentifierRequestTx) etc. + /// Payload type for read/write data by identifier etc. type DiagnosticPayload: Encode + Clone + core::fmt::Debug + PartialEq + 'static; /// UDS Routine Identifier type. type RID: RoutineIdentifier + Clone + core::fmt::Debug + PartialEq + 'static; @@ -351,68 +135,10 @@ pub trait DiagnosticDefinitionTx: 'static { type RoutinePayload: Encode + Clone + core::fmt::Debug + PartialEq + 'static; } -/// A trait that defines the user-defined diagnostic definitions/specifiers for UDS requests and responses. -/// -/// Used to specify the types of the identifiers and payloads used in UDS requests and responses. -/// It allows for flexibility in defining custom data types while adhering to the UDS protocol. -pub trait DiagnosticDefinition: 'static { - /// UDS Data Identifier - /// - /// Requests : [`ReadDataByIdentifierRequest`](crate::ReadDataByIdentifierRequest), [`WriteDataByIdentifierRequest`](crate::WriteDataByIdentifierRequest), and [`ReadDTCInfoRequest`](crate::ReadDTCInfoRequest) - /// Responses: [`ReadDataByIdentifierResponse`](crate::ReadDataByIdentifierResponse), [`WriteDataByIdentifierResponse`](crate::WriteDataByIdentifierResponse), and [`ReadDTCInfoResponse`](crate::ReadDTCInfoResponse) - type DID: Identifier - + Clone - + std::fmt::Debug - + Send - + Sync - + PartialEq - + 'static - + maybe_serde::Bound - + maybe_utoipa::Bound; - /// Response payload for [`ReadDataByIdentifierRequest`](crate::ReadDataByIdentifierRequest) - type DiagnosticPayload: SingleValueWireFormat - + IterableWireFormat - + Clone - + std::fmt::Debug - + Send - + Sync - + PartialEq - + maybe_serde::Bound - + maybe_utoipa::Bound - + 'static; - - /// UDS Routine Identifier - /// - /// This is used to identify the routine to be controlled in a [`RoutineControlRequest`](crate::RoutineControlRequest) - type RID: RoutineIdentifier - + Clone - + std::fmt::Debug - + Send - + Sync - + PartialEq - + 'static - + maybe_serde::Bound - + maybe_utoipa::Bound; - /// Payload for both requests and responses of [`RoutineControlRequest`](crate::RoutineControlRequest) and [`RoutineControlResponse`](crate::RoutineControlResponse) - type RoutinePayload: SingleValueWireFormat - + IterableWireFormat - + Clone - + std::fmt::Debug - + Send - + Sync - + PartialEq - + 'static - + maybe_serde::Bound - + maybe_utoipa::Bound; -} - -/// tests #[cfg(test)] mod tests { use super::*; use crate::{Identifier, UDSIdentifier}; - use byteorder_embedded_io::io::ReadBytesExt; - use std::io::Cursor; #[cfg_attr(feature = "serde", derive(serde::Deserialize, serde::Serialize))] #[derive(Clone, Copy, Debug, Eq, PartialEq)] @@ -447,44 +173,32 @@ mod tests { } } - #[derive(Debug)] - pub struct MyPayload { - identifier: MyIdentifier, - u8_value: u8, - } - #[test] - fn test_identifier() { - let mut buffer = Cursor::new(vec![0u8; 2]); + fn test_identifier_encode_decode() { let identifier = MyIdentifier::Identifier1; - WireFormat::encode(&identifier, &mut buffer).unwrap(); - buffer.set_position(0); - let read_identifier = MyIdentifier::parse_from_list(&mut buffer).unwrap(); - assert_eq!(identifier, read_identifier[0]); + let mut buf = [0u8; 2]; + Encode::encode(&identifier, &mut buf.as_mut_slice()).unwrap(); + let (decoded, rest) = ::decode(&buf).unwrap(); + assert_eq!(identifier, decoded); + assert!(rest.is_empty()); } #[test] #[allow(clippy::match_same_arms)] - fn test_payload() { - let mut buffer = Cursor::new(vec![0x01, 0x01, 0xFF, 0x02, 0x02, 0xFF, 0x03, 0x03]); - // Read until the end of the buffer - while let Some(identifier) = MyIdentifier::parse_from_payload(&mut buffer).unwrap() { - match identifier { - MyIdentifier::Identifier1 | MyIdentifier::Identifier2 => { - let payload = MyPayload { - identifier, - u8_value: buffer.read_u8().unwrap(), - }; - assert!(matches!( - payload.identifier, - MyIdentifier::Identifier1 | MyIdentifier::Identifier2 - )); - assert_eq!(payload.u8_value, 0xFF); - } - MyIdentifier::Identifier3 => (), - MyIdentifier::UDSIdentifier(_) => (), + fn test_identifier_decode_iter() { + let data = [0x01u8, 0x01, 0x02, 0x02, 0x03, 0x03]; + let mut remaining = &data[..]; + let mut count = 0; + while let Some((id, rest)) = MyIdentifier::decode_next(remaining).unwrap() { + remaining = rest; + count += 1; + match id { + MyIdentifier::Identifier1 => assert_eq!(count, 1), + MyIdentifier::Identifier2 => assert_eq!(count, 2), + MyIdentifier::Identifier3 => assert_eq!(count, 3), + MyIdentifier::UDSIdentifier(_) => panic!("Unexpected"), } } - println!("Testing printing"); + assert_eq!(count, 3); } } From 32dfdd2bc5268dcb1183a23756b33ae1acde6aa6 Mon Sep 17 00:00:00 2001 From: Zach Heylmun Date: Fri, 3 Apr 2026 12:37:15 -0400 Subject: [PATCH 11/58] update all tests to use Encode/Decode traits Migrate test modules from removed WireFormat/SingleValueWireFormat to the new Encode/Decode API: - Replace WireFormat::encode with Encode::encode - Replace SingleValueWireFormat::decode with Decode::decode - Replace required_size() with encoded_size() - Switch SecurityAccess/TransferData tests to *Tx types - Remove RequestFileTransfer encode/decode tests (service not yet migrated) - Remove old read_data_by_identifier, routine_control, and write_data_by_identifier tests (types removed) 72 tests passing. --- src/services/clear_dtc_information.rs | 11 +- src/services/communication_control.rs | 22 +- src/services/control_dtc_settings.rs | 16 +- src/services/diagnostic_session_control.rs | 20 +- src/services/ecu_reset.rs | 14 +- src/services/request_download.rs | 12 +- src/services/request_file_transfer.rs | 410 +-------------------- src/services/security_access.rs | 21 +- src/services/tester_present.rs | 10 +- src/services/transfer_data.rs | 22 +- 10 files changed, 82 insertions(+), 476 deletions(-) diff --git a/src/services/clear_dtc_information.rs b/src/services/clear_dtc_information.rs index 254722c..31b7a61 100644 --- a/src/services/clear_dtc_information.rs +++ b/src/services/clear_dtc_information.rs @@ -84,18 +84,19 @@ impl<'a> Decode<'a> for ClearDiagnosticInfoRequest { #[cfg(test)] mod request { use super::*; + use crate::{Decode, Encode}; #[test] fn decode_clear_dtc_info_request() { let bytes = [0xFF, 0xFF, 0xFF, 0x00]; let compare = ClearDiagnosticInfoRequest::new(CLEAR_ALL_DTCS, 0); - let req = ::decode(&mut &bytes[..]).unwrap(); + let (req, _) = ::decode(&bytes).unwrap(); assert_eq!(req, compare); - let mut bytes = vec![]; - let written = WireFormat::encode(&req, &mut bytes).unwrap(); - assert_eq!(bytes, [0xFF, 0xFF, 0xFF, 0x00]); - assert_eq!(req.required_size(), written); + let mut buf = vec![]; + let written = Encode::encode(&req, &mut buf).unwrap(); + assert_eq!(buf, [0xFF, 0xFF, 0xFF, 0x00]); + assert_eq!(req.encoded_size(), written); } #[test] diff --git a/src/services/communication_control.rs b/src/services/communication_control.rs index 4e0b15f..433bd09 100644 --- a/src/services/communication_control.rs +++ b/src/services/communication_control.rs @@ -176,11 +176,12 @@ impl<'a> Decode<'a> for CommunicationControlResponse { #[cfg(test)] mod request { use super::*; + use crate::{Decode, Encode}; #[test] fn simple_request() { let bytes: [u8; 3] = [0x01, 0x02, 0x03]; - let req = ::decode(&mut bytes.as_slice()).unwrap(); + let (req, _) = ::decode(&bytes).unwrap(); assert_eq!( req.control_type(), CommunicationControlType::EnableRxAndDisableTx @@ -189,15 +190,15 @@ mod request { assert_eq!(req.node_id, None); let mut buffer = Vec::new(); - let written = WireFormat::encode(&req, &mut buffer).unwrap(); - assert_eq!(written, req.required_size()); - assert_eq!(buffer.len(), req.required_size()); + let written = Encode::encode(&req, &mut buffer).unwrap(); + assert_eq!(written, req.encoded_size()); + assert_eq!(buffer.len(), req.encoded_size()); } #[test] fn node_id() { let bytes: [u8; 4] = [0x05, 0x02, 0x01, 0x02]; - let req = ::decode(&mut bytes.as_slice()).unwrap(); + let (req, _) = ::decode(&bytes).unwrap(); assert_eq!( req.control_type(), CommunicationControlType::EnableRxAndTxWithEnhancedAddressInfo @@ -206,9 +207,9 @@ mod request { assert_eq!(req.node_id, Some(258)); let mut buffer = Vec::new(); - let written = WireFormat::encode(&req, &mut buffer).unwrap(); - assert_eq!(written, req.required_size()); - assert_eq!(buffer.len(), req.required_size()); + let written = Encode::encode(&req, &mut buffer).unwrap(); + assert_eq!(written, req.encoded_size()); + assert_eq!(buffer.len(), req.encoded_size()); } #[test] @@ -238,18 +239,19 @@ mod request { #[cfg(test)] mod response { use super::*; + use crate::{Decode, Encode}; #[test] fn simple_response() { let bytes: [u8; 1] = [0x01]; - let res = ::decode(&mut bytes.as_slice()).unwrap(); + let (res, _) = ::decode(&bytes).unwrap(); assert_eq!( res.control_type, CommunicationControlType::EnableRxAndDisableTx ); let mut buffer = Vec::new(); - let written = WireFormat::encode(&res, &mut buffer).unwrap(); + let written = Encode::encode(&res, &mut buffer).unwrap(); assert_eq!(written, 1); assert_eq!(buffer.len(), written); } diff --git a/src/services/control_dtc_settings.rs b/src/services/control_dtc_settings.rs index ef98c23..eee971f 100644 --- a/src/services/control_dtc_settings.rs +++ b/src/services/control_dtc_settings.rs @@ -101,18 +101,18 @@ impl<'a> Decode<'a> for ControlDTCSettingsResponse { #[cfg(test)] mod request { use super::*; - use crate::DtcSettings; + use crate::{Decode, DtcSettings, Encode}; #[test] fn simple_request() { let req = ControlDTCSettingsRequest::new(DtcSettings::On, true); let mut buffer = Vec::new(); - let written = WireFormat::encode(&req, &mut buffer).unwrap(); + let written = Encode::encode(&req, &mut buffer).unwrap(); assert_eq!(buffer, vec![0x81]); assert_eq!(written, buffer.len()); - assert_eq!(req.required_size(), buffer.len()); + assert_eq!(req.encoded_size(), buffer.len()); - let parsed = ::decode(&mut buffer.as_slice()).unwrap(); + let (parsed, _) = ::decode(&buffer).unwrap(); assert_eq!(parsed.setting, DtcSettings::On); assert!(parsed.suppress_response); } @@ -121,18 +121,18 @@ mod request { #[cfg(test)] mod response { use super::*; - use crate::DtcSettings; + use crate::{Decode, DtcSettings, Encode}; #[test] fn simple_response() { let req = ControlDTCSettingsResponse::new(DtcSettings::On); let mut buffer = Vec::new(); - let written = WireFormat::encode(&req, &mut buffer).unwrap(); + let written = Encode::encode(&req, &mut buffer).unwrap(); assert_eq!(buffer, vec![0x01]); assert_eq!(written, buffer.len()); - assert_eq!(req.required_size(), buffer.len()); + assert_eq!(req.encoded_size(), buffer.len()); - let parsed = ::decode(&mut buffer.as_slice()).unwrap(); + let (parsed, _) = ::decode(&buffer).unwrap(); assert_eq!(parsed.setting, DtcSettings::On); } } diff --git a/src/services/diagnostic_session_control.rs b/src/services/diagnostic_session_control.rs index fe4c02d..16e3ff2 100644 --- a/src/services/diagnostic_session_control.rs +++ b/src/services/diagnostic_session_control.rs @@ -155,13 +155,13 @@ impl<'a> Decode<'a> for DiagnosticSessionControlResponse { #[cfg(test)] mod request { use super::*; - use crate::DiagnosticSessionType; + use crate::{Decode, DiagnosticSessionType, Encode}; #[test] fn test_diagnostic_session_control_request() { let bytes: [u8; 1] = [0x02]; - let req: DiagnosticSessionControlRequest = - ::decode(&mut bytes.as_slice()).unwrap(); + let (req, _) = + ::decode(&bytes).unwrap(); assert!(!req.suppress_positive_response()); assert_eq!( req.session_type(), @@ -169,29 +169,29 @@ mod request { ); let mut buffer = Vec::new(); - WireFormat::encode(&req, &mut buffer).unwrap(); + Encode::encode(&req, &mut buffer).unwrap(); assert_eq!(buffer, bytes); - assert_eq!(req.required_size(), 1); + assert_eq!(req.encoded_size(), 1); } } #[cfg(test)] mod response { use super::*; - use crate::DiagnosticSessionType; + use crate::{Decode, DiagnosticSessionType, Encode}; #[test] fn test_diagnostic_session_control_response() { let bytes = [0x02, 0x11, 0x22, 0x33, 0x44]; - let resp: DiagnosticSessionControlResponse = - ::decode(&mut bytes.as_slice()).unwrap(); + let (resp, _) = + ::decode(&bytes).unwrap(); assert_eq!(resp.session_type, DiagnosticSessionType::ProgrammingSession); assert_eq!(resp.p2_server_max, 0x1122); assert_eq!(resp.p2_star_server_max, 0x3344); let mut buffer = Vec::new(); - WireFormat::encode(&resp, &mut buffer).unwrap(); + Encode::encode(&resp, &mut buffer).unwrap(); assert_eq!(buffer, bytes); - assert_eq!(resp.required_size(), 5); + assert_eq!(resp.encoded_size(), 5); } } diff --git a/src/services/ecu_reset.rs b/src/services/ecu_reset.rs index 797f941..9d2fc1e 100644 --- a/src/services/ecu_reset.rs +++ b/src/services/ecu_reset.rs @@ -129,35 +129,37 @@ impl<'a> Decode<'a> for EcuResetResponse { #[cfg(test)] mod request { use super::*; + use crate::{Decode, Encode}; #[test] fn ecu_reset_request() { let bytes: [u8; 2] = [0x81, 0x00]; let req = EcuResetRequest::new(true, ResetType::HardReset); let mut buffer = Vec::new(); - let written = WireFormat::encode(&req, &mut buffer).unwrap(); - let result = ::decode(&mut bytes.as_slice()).unwrap(); + let written = Encode::encode(&req, &mut buffer).unwrap(); + let (result, _) = ::decode(&bytes).unwrap(); assert_eq!(result, req); assert_eq!(written, 1); - assert_eq!(written, req.required_size()); + assert_eq!(written, req.encoded_size()); } } #[cfg(test)] mod response { use super::*; + use crate::{Decode, Encode}; #[test] fn ecu_reset_response() { let bytes: [u8; 2] = [0x01, 0x20]; let resp = EcuResetResponse::new(ResetType::HardReset, 0x20); let mut buffer = Vec::new(); - let written = WireFormat::encode(&resp, &mut buffer).unwrap(); - let result = ::decode(&mut bytes.as_slice()).unwrap(); + let written = Encode::encode(&resp, &mut buffer).unwrap(); + let (result, _) = ::decode(&bytes).unwrap(); assert_eq!(result, resp); assert_eq!(written, 2); - assert_eq!(written, resp.required_size()); + assert_eq!(written, resp.encoded_size()); } } diff --git a/src/services/request_download.rs b/src/services/request_download.rs index 4e99c87..5bd884f 100644 --- a/src/services/request_download.rs +++ b/src/services/request_download.rs @@ -237,6 +237,8 @@ impl<'a> Decode<'a> for RequestDownloadResponseTx<'a> { #[cfg(test)] mod tests { use super::*; + use crate::{Decode, Encode}; + #[test] fn simple_request() { let bytes: [u8; 7] = [ @@ -245,7 +247,7 @@ mod tests { 0xF0, 0xFF, 0xFF, 0x67, // memory address 0x0A, ]; - let req = ::decode(&mut bytes.as_slice()).unwrap(); + let (req, _) = ::decode(&bytes).unwrap(); assert_eq!(u8::from(req.data_format_identifier), 0); assert_eq!(u8::from(req.address_and_length_format_identifier), 0x14); @@ -276,8 +278,8 @@ mod tests { 0x11, // 1 byte for memory size, 1 byte for memory address 0x67, ]; - let req = ::decode(&mut bytes.as_slice()); - assert!(matches!(req, Err(Error::IoError(_)))); + let result = ::decode(&bytes); + assert!(result.is_err()); } #[test] @@ -302,8 +304,8 @@ mod tests { let req = RequestDownloadRequest::new(0x00.into(), 0xF0_FF_FF_67, 0x0A).unwrap(); let mut vec = vec![]; - WireFormat::encode(&req, &mut vec).unwrap(); + Encode::encode(&req, &mut vec).unwrap(); - assert_eq!(vec.len(), req.required_size()); + assert_eq!(vec.len(), req.encoded_size()); } } diff --git a/src/services/request_file_transfer.rs b/src/services/request_file_transfer.rs index 03d45bf..5088206 100644 --- a/src/services/request_file_transfer.rs +++ b/src/services/request_file_transfer.rs @@ -333,205 +333,6 @@ pub enum RequestFileTransferResponse { #[cfg(test)] mod request_tests { use super::*; - use crate::param_length_u128; - - // helper function to get some bytes to read from - #[allow(clippy::cast_possible_truncation)] - fn get_bytes(mode: FileOperationMode, file_name: &str, file_size: u128) -> Vec { - let mut bytes: Vec = Vec::new(); - bytes.push(mode.into()); // AddFile (u8) - // write file_name len as 2 bytes - bytes - .write_u16::(file_name.len() as u16) - .unwrap(); - bytes.extend_from_slice(file_name.as_bytes()); - - if mode != FileOperationMode::DeleteFile && mode != FileOperationMode::ReadDir { - bytes.push(0x00); // No compression or encryption (u8) - } - // only add file size if not DeleteFile, ReadDir, or ReadFile - if mode != FileOperationMode::DeleteFile - && mode != FileOperationMode::ReadDir - && mode != FileOperationMode::ReadFile - { - // count the number of bytes occupied by the file size - let num = param_length_u128(file_size) as u8; - // use write exact - bytes.write_u8(num).unwrap(); - // write the file size only as many bytes as needed - // Slice off only the number of bytes we need from the end of the file_size bytes - let source = file_size.to_be_bytes(); - // file_size_uncompressed - bytes.extend_from_slice(&source[16 - num as usize..]); - // file_size_compressed - bytes.extend_from_slice(&source[16 - num as usize..]); - } - bytes - } - - #[test] - #[allow(clippy::cast_possible_truncation)] - #[allow(clippy::cast_lossless)] - fn add_file() { - let compare_string = "test.txt"; - let file_size: u128 = (u64::MAX as u128) + 1000u128; - let bytes = get_bytes(FileOperationMode::AddFile, compare_string, file_size); - let req: crate::RequestFileTransferRequest = - RequestFileTransferRequest::decode(&mut bytes.as_slice()).unwrap(); - - let mut written_bytes = Vec::new(); - let written = req.encode(&mut written_bytes).unwrap(); - assert_eq!(written, written_bytes.len()); - assert_eq!(written, req.required_size()); - - match req { - RequestFileTransferRequest::AddFile(pl, data_format_pl, file_size_pl) => { - assert_eq!(pl.mode_of_operation, FileOperationMode::AddFile); - assert_eq!(pl.file_path_and_name_length, compare_string.len() as u16); - assert_eq!(pl.file_path_and_name, compare_string); - assert_eq!(data_format_pl, DataFormatIdentifier::new(0, 0).unwrap()); - assert_eq!(file_size_pl.file_size_parameter_length, 9); - assert_eq!(file_size_pl.file_size_uncompressed, file_size); - assert_eq!(file_size_pl.file_size_compressed, file_size); - } - _ => panic!("Expected AddFile"), - } - } - - #[test] - #[allow(clippy::cast_possible_truncation)] - fn delete_file() { - let compare_string = "/var/tmp/delete_file.bin"; - let bytes = get_bytes(FileOperationMode::DeleteFile, compare_string, 0); - let req = RequestFileTransferRequest::decode(&mut bytes.as_slice()).unwrap(); - - let mut written_bytes = Vec::new(); - let written = req.encode(&mut written_bytes).unwrap(); - assert_eq!(written, written_bytes.len()); - assert_eq!(written, req.required_size()); - - match req { - RequestFileTransferRequest::DeleteFile(pl) => { - assert_eq!(pl.mode_of_operation, FileOperationMode::DeleteFile); - assert_eq!(pl.file_path_and_name_length, compare_string.len() as u16); - assert_eq!(pl.file_path_and_name, compare_string); - } - _ => panic!("Expected DeleteFile"), - } - } - - #[test] - #[allow(clippy::cast_possible_truncation)] - fn write_add_file() { - let compare_string = "test.txt"; - let file_size: u128 = 0x1234; - let bytes = get_bytes(FileOperationMode::AddFile, compare_string, file_size); - let req = RequestFileTransferRequest::decode(&mut bytes.as_slice()).unwrap(); - - let mut bytes = Vec::new(); - let written = req.encode(&mut bytes).unwrap(); - assert_eq!(written, bytes.len()); - assert_eq!(written, req.required_size()); - - // Should be equivalent to our helper function - let expected_bytes = get_bytes(FileOperationMode::AddFile, compare_string, file_size); - assert_eq!(bytes, expected_bytes); - } - - #[test] - #[allow(clippy::cast_possible_truncation)] - fn write_delete_file() { - let compare_string = "/var/tmp/delete_file.bin"; - let req = RequestFileTransferRequest::DeleteFile(NamePayload { - mode_of_operation: FileOperationMode::DeleteFile, - file_path_and_name_length: compare_string.len() as u16, - file_path_and_name: compare_string.to_string(), - }); - let mut bytes = Vec::new(); - let written = req.encode(&mut bytes).unwrap(); - // Should be equivalent to our helper function - let expected_bytes = get_bytes(FileOperationMode::DeleteFile, compare_string, 0); - assert_eq!(bytes, expected_bytes); - assert_eq!(bytes.len(), written); - assert_eq!(req.required_size(), written); - } - - #[test] - #[allow(clippy::cast_possible_truncation)] - fn replace_file() { - let compare_string = "/opt/testing/replace_file.bin"; - let file_size: u128 = 0x1234; - let bytes = get_bytes(FileOperationMode::ReplaceFile, compare_string, file_size); - let req = RequestFileTransferRequest::decode(&mut bytes.as_slice()).unwrap(); - - let mut written_bytes = Vec::new(); - let written = req.encode(&mut written_bytes).unwrap(); - assert_eq!(written, written_bytes.len()); - assert_eq!(written, req.required_size()); - - match req { - RequestFileTransferRequest::ReplaceFile(pl, data_format_pl, file_size_pl) => { - assert_eq!(pl.mode_of_operation, FileOperationMode::ReplaceFile); - assert_eq!(pl.file_path_and_name_length, compare_string.len() as u16); - assert_eq!(pl.file_path_and_name, compare_string); - assert_eq!(data_format_pl, DataFormatIdentifier::new(0, 0).unwrap()); - assert_eq!(file_size_pl.file_size_parameter_length, 2); - assert_eq!(file_size_pl.file_size_uncompressed, file_size); - assert_eq!(file_size_pl.file_size_compressed, file_size); - } - _ => panic!("Expected ReplaceFile"), - } - } - - #[test] - #[allow(clippy::cast_possible_truncation)] - fn read_file() { - let compare_string = "/opt/testing/just_reading_stuff.txt"; - let file_size: u128 = 0x0; - let bytes = get_bytes(FileOperationMode::ReadFile, compare_string, file_size); - let req = RequestFileTransferRequest::decode(&mut bytes.as_slice()).unwrap(); - - let mut written_bytes = Vec::new(); - let written = req.encode(&mut written_bytes).unwrap(); - assert_eq!(written, written_bytes.len()); - assert_eq!(written, req.required_size()); - - match req { - RequestFileTransferRequest::ReadFile(pl, data_format_pl) => { - assert_eq!(pl.mode_of_operation, FileOperationMode::ReadFile); - assert_eq!(pl.file_path_and_name_length, compare_string.len() as u16); - assert_eq!(pl.file_path_and_name, compare_string); - assert_eq!(data_format_pl, DataFormatIdentifier::new(0, 0).unwrap()); - } - _ => panic!("Expected ReadFile"), - } - } - - #[test] - #[allow(clippy::cast_possible_truncation)] - fn resume_file() { - let compare_string = "/var/tmp/resume_file.bin"; - let file_size = 0x1234; - let bytes = get_bytes(FileOperationMode::ResumeFile, compare_string, file_size); - let req = RequestFileTransferRequest::decode(&mut bytes.as_slice()).unwrap(); - let mut written_bytes = Vec::new(); - let written = req.encode(&mut written_bytes).unwrap(); - assert_eq!(written, written_bytes.len()); - assert_eq!(written, req.required_size()); - - match req { - RequestFileTransferRequest::ResumeFile(pl, data_format_pl, file_size_pl) => { - assert_eq!(pl.mode_of_operation, FileOperationMode::ResumeFile); - assert_eq!(pl.file_path_and_name_length, compare_string.len() as u16); - assert_eq!(pl.file_path_and_name, compare_string); - assert_eq!(data_format_pl, DataFormatIdentifier::new(0, 0).unwrap()); - assert_eq!(file_size_pl.file_size_parameter_length, 2); - assert_eq!(file_size_pl.file_size_uncompressed, file_size); - assert_eq!(file_size_pl.file_size_compressed, file_size); - } - _ => panic!("Expected ResumeFile"), - } - } #[test] fn test_file_operation_mode() { @@ -547,214 +348,7 @@ mod request_tests { FileOperationMode::try_from(0x07).unwrap() ); } -} - -#[cfg(test)] -mod response_tests { - - use crate::{param_length_u32, param_length_u128}; - - use super::*; - - fn get_bytes( - mode: FileOperationMode, - max_block_len: u32, - data_format: u8, - file_size: u128, - file_position: u64, - ) -> Vec { - let mut bytes: Vec = Vec::new(); - bytes.push(mode.into()); - - // SentDataPayload - if mode != FileOperationMode::DeleteFile { - let len_max_block_len = param_length_u32(max_block_len); - bytes.write_u8(len_max_block_len).unwrap(); - let source = max_block_len.to_be_bytes(); - bytes.extend_from_slice(&source[4 - len_max_block_len as usize..]); - - let mut data_format = data_format; - if mode == FileOperationMode::ReadDir { - data_format = 0x00; - } - // DataFormatIdentifier - bytes.write_u8(data_format).unwrap(); - } - - // File or dir size - let num = param_length_u128(file_size); - if mode == FileOperationMode::ReadFile { - print!("{mode:?}"); - - bytes - .write_u16::(num) - .unwrap(); - let source = file_size.to_be_bytes(); - // Compressed - bytes.extend_from_slice(&source[16 - num as usize..]); - // Uncompressed - bytes.extend_from_slice(&source[16 - num as usize..]); - } else if mode == FileOperationMode::ReadDir { - bytes - .write_u16::(num) - .unwrap(); - let source = file_size.to_be_bytes(); - // Compressed - bytes.extend_from_slice(&source[16 - num as usize..]); - } - - if mode == FileOperationMode::ResumeFile { - bytes - .write_u64::(file_position) - .unwrap(); - } - bytes - } - - #[test] - fn response_add() { - let bytes = get_bytes(FileOperationMode::AddFile, 0x1234, 0x00, 0x1234, 0); - let reader = &mut &bytes[..]; - let resp = RequestFileTransferResponse::decode(reader).unwrap(); - assert!(reader.is_empty()); - - let mut written_bytes = Vec::new(); - let written = resp.encode(&mut written_bytes).unwrap(); - assert_eq!(written, bytes.len()); - assert_eq!(resp.required_size(), bytes.len()); - - match resp { - RequestFileTransferResponse::AddFile(mode, sent_data, data_format) => { - assert_eq!(mode, FileOperationMode::AddFile); - assert_eq!(sent_data.length_format_identifier, 2); - assert_eq!(sent_data.max_number_of_block_length, vec![0x12, 0x34]); - assert_eq!(data_format, DataFormatIdentifier::new(0, 0).unwrap()); - } - _ => panic!("Expected AddFile"), - } - } - - #[test] - fn delete_file() { - let bytes = get_bytes(FileOperationMode::DeleteFile, 0, 0, 0, 0); - let reader = &mut &bytes[..]; - let resp = RequestFileTransferResponse::decode(reader).unwrap(); - assert!(reader.is_empty()); - - let mut written_bytes = Vec::new(); - let written = resp.encode(&mut written_bytes).unwrap(); - assert_eq!(written, bytes.len()); - assert_eq!(resp.required_size(), bytes.len()); - - match resp { - RequestFileTransferResponse::DeleteFile(mode) => { - assert_eq!(mode, FileOperationMode::DeleteFile); - } - _ => panic!("Expected DeleteFile"), - } - } - #[test] - fn replace_file() { - let bytes = get_bytes(FileOperationMode::ReplaceFile, 0x1_1234, 0, 0, 0); - let reader = &mut &bytes[..]; - let resp = RequestFileTransferResponse::decode(reader).unwrap(); - assert!(reader.is_empty()); - - let mut written_bytes = Vec::new(); - let written = resp.encode(&mut written_bytes).unwrap(); - assert_eq!(written, bytes.len()); - assert_eq!(resp.required_size(), bytes.len()); - - match resp { - RequestFileTransferResponse::ReplaceFile(mode, sent_data, data_format) => { - assert_eq!(mode, FileOperationMode::ReplaceFile); - assert_eq!(sent_data.length_format_identifier, 3); - assert_eq!(sent_data.max_number_of_block_length, vec![0x01, 0x12, 0x34]); - assert_eq!(data_format, DataFormatIdentifier::new(0, 0).unwrap()); - } - _ => panic!("Expected ReplaceFile"), - } - } - - #[test] - fn read_file() { - let bytes = get_bytes(FileOperationMode::ReadFile, 0x1, 0x11, 0x11_1111_1111, 0); - let reader = &mut &bytes[..]; - let resp = RequestFileTransferResponse::decode(reader).unwrap(); - assert!(reader.is_empty()); - - let mut written_bytes = Vec::new(); - let written = resp.encode(&mut written_bytes).unwrap(); - assert_eq!(written, bytes.len()); - assert_eq!(resp.required_size(), bytes.len()); - - match resp { - RequestFileTransferResponse::ReadFile(mode, sent_data, df, size) => { - assert_eq!(mode, FileOperationMode::ReadFile); - assert_eq!(sent_data.length_format_identifier, 1); - assert_eq!(sent_data.max_number_of_block_length, vec![0x01]); - assert_eq!(df, DataFormatIdentifier::new(0x01, 0x01).unwrap()); - assert_eq!(size.file_size_parameter_length, 5); - assert_eq!(size.file_size_uncompressed, 0x11_1111_1111); - assert_eq!(size.file_size_compressed, 0x11_1111_1111); - } - _ => panic!("Expected ReadFile"), - } - } - - #[test] - fn read_dir() { - let bytes = get_bytes(FileOperationMode::ReadDir, 0x1_1234, 0, 0x11_1111_1111, 0); - let reader = &mut &bytes[..]; - let resp = RequestFileTransferResponse::decode(reader).unwrap(); - assert!(reader.is_empty()); - - let mut written_bytes = Vec::new(); - let written = resp.encode(&mut written_bytes).unwrap(); - assert_eq!(written, bytes.len()); - assert_eq!(resp.required_size(), bytes.len()); - - match resp { - RequestFileTransferResponse::ReadDir(mode, sent_data, df, size) => { - assert_eq!(mode, FileOperationMode::ReadDir); - assert_eq!(sent_data.length_format_identifier, 3); - assert_eq!(sent_data.max_number_of_block_length, vec![0x01, 0x12, 0x34]); - assert_eq!(df, DataFormatIdentifier::new(0, 0).unwrap()); - assert_eq!(size.dir_info_parameter_length, 5); - assert_eq!(size.dir_info_length, 0x11_1111_1111); - } - _ => panic!("Expected ReadDir"), - } - } - - #[test] - fn resume_file() { - let bytes = get_bytes( - FileOperationMode::ResumeFile, - 0x1_1234, - 0x11, - 0x11_1111_1111, - 0x1234_5678_9ABC_DEF0, - ); - let reader = &mut &bytes[..]; - let resp = RequestFileTransferResponse::decode(reader).unwrap(); - assert!(reader.is_empty()); - - let mut written_bytes = Vec::new(); - let written = resp.encode(&mut written_bytes).unwrap(); - assert_eq!(written, bytes.len()); - assert_eq!(resp.required_size(), bytes.len()); - - match resp { - RequestFileTransferResponse::ResumeFile(mode, sent_data, df, pos) => { - assert_eq!(mode, FileOperationMode::ResumeFile); - assert_eq!(sent_data.length_format_identifier, 3); - assert_eq!(sent_data.max_number_of_block_length, vec![0x01, 0x12, 0x34]); - assert_eq!(df, DataFormatIdentifier::new(1, 1).unwrap()); - assert_eq!(pos.file_position, 0x1234_5678_9ABC_DEF0); - } - _ => panic!("Expected ResumeFile"), - } - } + // NOTE: The remaining request/response tests for RequestFileTransfer have been + // removed because this service has not yet been migrated to the new Encode/Decode traits. } diff --git a/src/services/security_access.rs b/src/services/security_access.rs index 9e9ed3c..4442176 100644 --- a/src/services/security_access.rs +++ b/src/services/security_access.rs @@ -262,6 +262,7 @@ impl<'a> Decode<'a> for SecurityAccessResponseTx<'a> { #[cfg(test)] mod request { use super::*; + use crate::{Decode, Encode}; #[test] fn request_seed() { @@ -269,23 +270,25 @@ mod request { 0x01, // aka SecurityAccessType::RequestSeed(0x01) 0x00, 0x01, 0x02, 0x03, 0x04, // fake data ]; - let req = SecurityAccessRequest::decode(&mut bytes.as_slice()).unwrap(); + let (req, _) = ::decode(&bytes).unwrap(); assert_eq!( - req.access_type, - SuppressablePositiveResponse::new(false, SecurityAccessType::RequestSeed(0x01)) + req.access_type(), + SecurityAccessType::RequestSeed(0x01) ); + assert_eq!(req.request_data(), &[0x00, 0x01, 0x02, 0x03, 0x04]); let mut buf = Vec::new(); - let written = req.encode(&mut buf).unwrap(); + let written = Encode::encode(&req, &mut buf).unwrap(); assert_eq!(written, bytes.len()); - assert_eq!(written, req.required_size()); + assert_eq!(written, req.encoded_size()); } } #[cfg(test)] mod response { use super::*; + use crate::{Decode, Encode}; #[test] fn response_send() { @@ -293,14 +296,14 @@ mod response { 0x02, // aka SecurityAccessType::SendKey(0x02) 0x00, 0x01, 0x02, 0x03, 0x04, // fake data ]; - let resp = SecurityAccessResponse::decode(&mut bytes.as_slice()).unwrap(); + let (resp, _) = ::decode(&bytes).unwrap(); assert_eq!(resp.access_type, SecurityAccessType::SendKey(0x02)); - assert_eq!(resp.security_seed, vec![0x00, 0x01, 0x02, 0x03, 0x04]); + assert_eq!(resp.security_seed, &[0x00, 0x01, 0x02, 0x03, 0x04]); let mut buf = Vec::new(); - let written = resp.encode(&mut buf).unwrap(); + let written = Encode::encode(&resp, &mut buf).unwrap(); assert_eq!(written, bytes.len()); - assert_eq!(written, resp.required_size()); + assert_eq!(written, resp.encoded_size()); } } diff --git a/src/services/tester_present.rs b/src/services/tester_present.rs index 5df29d0..fcd2f0b 100644 --- a/src/services/tester_present.rs +++ b/src/services/tester_present.rs @@ -169,6 +169,7 @@ impl<'a> Decode<'a> for TesterPresentResponse { #[cfg(test)] mod test { use super::*; + use crate::{Decode, Encode}; #[test] fn try_from_all_zero_subfunction() { @@ -203,7 +204,8 @@ mod test { fn make_request(byte: u8) -> Result { let bytes = vec![byte]; - ::decode(&mut bytes.as_slice()) + let (val, _) = ::decode(&bytes)?; + Ok(val) } #[test] @@ -243,7 +245,7 @@ mod test { fn write_request_type() { let test_type = TesterPresentRequest::new(false); let mut buffer = Vec::new(); - WireFormat::encode(&test_type, &mut buffer).unwrap(); + Encode::encode(&test_type, &mut buffer).unwrap(); let expected_bytes = vec![0]; assert_eq!(buffer, expected_bytes); @@ -252,7 +254,7 @@ mod test { #[test] fn read_response_type() { let bytes = vec![0u8]; - let test_type = ::decode(&mut bytes.as_slice()).unwrap(); + let (test_type, _) = ::decode(&bytes).unwrap(); assert_eq!(test_type, TesterPresentResponse::new()); } @@ -260,7 +262,7 @@ mod test { fn write_response_type() { let test_type = TesterPresentResponse::new(); let mut buffer = Vec::new(); - WireFormat::encode(&test_type, &mut buffer).unwrap(); + Encode::encode(&test_type, &mut buffer).unwrap(); let expected_bytes = vec![0]; assert_eq!(buffer, expected_bytes); diff --git a/src/services/transfer_data.rs b/src/services/transfer_data.rs index 822cec3..5aa37a6 100644 --- a/src/services/transfer_data.rs +++ b/src/services/transfer_data.rs @@ -195,41 +195,41 @@ impl<'a> Decode<'a> for TransferDataResponseTx<'a> { #[cfg(test)] mod request { use super::*; + use crate::{Decode, Encode}; #[test] fn test_transfer_data_request() { - let bytes = [0x01, 0x02, 0x03, 0x04]; - let req = TransferDataRequest::new(0x01, bytes.to_vec()); - let bytes = req.data.clone(); - let expected = vec![0x01, 0x02, 0x03, 0x04]; + let data = [0x01, 0x02, 0x03, 0x04]; + let req = TransferDataRequestTx::new(0x01, &data); assert_eq!(1, req.block_sequence_counter); - assert_eq!(bytes, expected); + assert_eq!(req.data, &[0x01, 0x02, 0x03, 0x04]); } #[test] fn read_request() { let bytes = [0x01, 0x02, 0x03, 0x04]; - let req = TransferDataRequest::decode(&mut bytes.as_slice()).unwrap(); + let (req, _) = ::decode(&bytes).unwrap(); let mut written_bytes = Vec::new(); - let written = req.encode(&mut written_bytes).unwrap(); + let written = Encode::encode(&req, &mut written_bytes).unwrap(); assert_eq!(written, written_bytes.len()); - assert_eq!(written, req.required_size()); + assert_eq!(written, req.encoded_size()); } } #[cfg(test)] mod response { use super::*; + use crate::{Decode, Encode}; #[test] fn simple_response() { let bytes = [0x01, 0x02, 0x03, 0x04]; - let resp = TransferDataResponse::decode(&mut bytes.as_slice()).unwrap(); + let (resp, _) = ::decode(&bytes).unwrap(); let mut written_bytes = Vec::new(); - let written = resp.encode(&mut written_bytes).unwrap(); + let written = Encode::encode(&resp, &mut written_bytes).unwrap(); assert_eq!(written, written_bytes.len()); - assert_eq!(written, resp.required_size()); + assert_eq!(written, resp.encoded_size()); } } From 75a0f7fe16583819c791d2f56e9fb8bd54295660 Mon Sep 17 00:00:00 2001 From: Zach Heylmun Date: Fri, 3 Apr 2026 12:56:47 -0400 Subject: [PATCH 12/58] clean up dead code and add missing docs after trait removal - Make pub(crate) constructors public (users now construct types directly) - Add doc comments to all newly-public functions - Remove dead helper methods (get_shortened_memory_address/size, MemoryFormatIdentifier::from_values) - Remove unused constants and type aliases - Add Default impl for TesterPresentResponse - Fix all clippy warnings (zero remaining) --- src/common/format_identifiers.rs | 13 ------ src/services/communication_control.rs | 18 ++++++-- src/services/control_dtc_settings.rs | 8 +++- src/services/diagnostic_session_control.rs | 6 ++- src/services/ecu_reset.rs | 6 ++- src/services/negative_response.rs | 3 +- src/services/read_data_by_identifier.rs | 5 ++- src/services/read_dtc_information.rs | 10 ++--- src/services/request_download.rs | 49 ++++++++-------------- src/services/routine_control.rs | 6 ++- src/services/tester_present.rs | 23 +++++----- src/services/write_data_by_identifier.rs | 10 +---- 12 files changed, 71 insertions(+), 86 deletions(-) diff --git a/src/common/format_identifiers.rs b/src/common/format_identifiers.rs index eed06c0..4bf3331 100644 --- a/src/common/format_identifiers.rs +++ b/src/common/format_identifiers.rs @@ -29,19 +29,6 @@ pub(crate) struct MemoryFormatIdentifier { } impl MemoryFormatIdentifier { - /// Takes in the actual memory address to be used and the size of the memory to be used - /// and computes how many bytes are needed to represent them - #[allow(clippy::cast_possible_truncation)] - pub fn from_values(memory_size: u32, memory_address: u64) -> Self { - let memory_address_length = (u64::BITS - memory_address.leading_zeros()).div_ceil(8) as u8; - let memory_size_length = (u32::BITS - memory_size.leading_zeros()).div_ceil(8) as u8; - - Self { - memory_size_length, - memory_address_length, - } - } - /// Get the total length of the `memory_size` and `memory_address` fields pub fn len(self) -> usize { self.memory_size_length as usize + self.memory_address_length as usize diff --git a/src/services/communication_control.rs b/src/services/communication_control.rs index 433bd09..dfe0866 100644 --- a/src/services/communication_control.rs +++ b/src/services/communication_control.rs @@ -30,7 +30,12 @@ pub struct CommunicationControlRequest { } impl CommunicationControlRequest { - pub(crate) fn new( + /// Create a `CommunicationControlRequest` with standard address information. + /// + /// # Panics + /// Panics (debug) if an extended-address control type is passed. + #[must_use] + pub fn new( suppress_positive_response: bool, control_type: CommunicationControlType, communication_type: CommunicationType, @@ -46,7 +51,12 @@ impl CommunicationControlRequest { } } - pub(crate) fn new_with_node_id( + /// Create a `CommunicationControlRequest` with enhanced address information. + /// + /// # Panics + /// Panics if a non-extended control type is passed. + #[must_use] + pub fn new_with_node_id( suppress_positive_response: bool, control_type: CommunicationControlType, communication_type: CommunicationType, @@ -145,7 +155,9 @@ pub struct CommunicationControlResponse { } impl CommunicationControlResponse { - pub(crate) fn new(control_type: CommunicationControlType) -> Self { + /// Create a new `CommunicationControlResponse`. + #[must_use] + pub fn new(control_type: CommunicationControlType) -> Self { Self { control_type } } } diff --git a/src/services/control_dtc_settings.rs b/src/services/control_dtc_settings.rs index eee971f..db4b165 100644 --- a/src/services/control_dtc_settings.rs +++ b/src/services/control_dtc_settings.rs @@ -14,7 +14,9 @@ pub struct ControlDTCSettingsRequest { } impl ControlDTCSettingsRequest { - pub(crate) fn new(setting: DtcSettings, suppress_response: bool) -> Self { + /// Create a new `ControlDTCSettingsRequest`. + #[must_use] + pub fn new(setting: DtcSettings, suppress_response: bool) -> Self { Self { setting, suppress_response, @@ -70,7 +72,9 @@ pub struct ControlDTCSettingsResponse { } impl ControlDTCSettingsResponse { - pub(crate) fn new(setting: DtcSettings) -> Self { + /// Create a new `ControlDTCSettingsResponse`. + #[must_use] + pub fn new(setting: DtcSettings) -> Self { Self { setting } } } diff --git a/src/services/diagnostic_session_control.rs b/src/services/diagnostic_session_control.rs index 16e3ff2..aa51cb6 100644 --- a/src/services/diagnostic_session_control.rs +++ b/src/services/diagnostic_session_control.rs @@ -29,7 +29,8 @@ pub struct DiagnosticSessionControlRequest { impl DiagnosticSessionControlRequest { /// Create a new `DiagnosticSessionControlRequest` - pub(crate) fn new( + #[must_use] + pub fn new( suppress_positive_response: bool, session_type: DiagnosticSessionType, ) -> Self { @@ -102,7 +103,8 @@ pub struct DiagnosticSessionControlResponse { impl DiagnosticSessionControlResponse { /// Create a new `DiagnosticSessionControlResponse` - pub(crate) fn new( + #[must_use] + pub fn new( session_type: DiagnosticSessionType, p2_server_max: u16, p2_star_server_max: u16, diff --git a/src/services/ecu_reset.rs b/src/services/ecu_reset.rs index 9d2fc1e..e9c82b5 100644 --- a/src/services/ecu_reset.rs +++ b/src/services/ecu_reset.rs @@ -20,7 +20,8 @@ pub struct EcuResetRequest { impl EcuResetRequest { /// Create a new '`EcuResetRequest`' - pub(crate) fn new(suppress_positive_response: bool, reset_type: ResetType) -> Self { + #[must_use] + pub fn new(suppress_positive_response: bool, reset_type: ResetType) -> Self { Self { reset_type: SuppressablePositiveResponse::new(suppress_positive_response, reset_type), } @@ -86,7 +87,8 @@ pub struct EcuResetResponse { impl EcuResetResponse { /// Create a new '`EcuResetResponse`' - pub(crate) fn new(reset_type: ResetType, power_down_time: u8) -> Self { + #[must_use] + pub fn new(reset_type: ResetType, power_down_time: u8) -> Self { Self { reset_type, power_down_time, diff --git a/src/services/negative_response.rs b/src/services/negative_response.rs index f3f903c..1177009 100644 --- a/src/services/negative_response.rs +++ b/src/services/negative_response.rs @@ -17,7 +17,8 @@ pub struct NegativeResponse { impl NegativeResponse { /// Create a new `NegativeResponse` - pub(crate) fn new(request_service: UdsServiceType, nrc: NegativeResponseCode) -> Self { + #[must_use] + pub fn new(request_service: UdsServiceType, nrc: NegativeResponseCode) -> Self { Self { request_service, nrc, diff --git a/src/services/read_data_by_identifier.rs b/src/services/read_data_by_identifier.rs index 2336dd0..a5f415f 100644 --- a/src/services/read_data_by_identifier.rs +++ b/src/services/read_data_by_identifier.rs @@ -23,7 +23,7 @@ pub struct ReadDataByIdentifierRequest { impl ReadDataByIdentifierRequest { /// Create a new request from a sequence of data identifiers - pub(crate) fn new(dids: I) -> Self + pub fn new(dids: I) -> Self where I: IntoIterator, { @@ -62,7 +62,8 @@ pub struct ReadDataByIdentifierResponse { } impl ReadDataByIdentifierResponse { - pub(crate) fn new(data: I) -> Self + /// Create a new response from an iterator of payloads. + pub fn new(data: I) -> Self where I: IntoIterator, { diff --git a/src/services/read_dtc_information.rs b/src/services/read_dtc_information.rs index 02977f8..243a195 100644 --- a/src/services/read_dtc_information.rs +++ b/src/services/read_dtc_information.rs @@ -22,7 +22,9 @@ pub struct ReadDTCInfoRequest { } impl ReadDTCInfoRequest { - pub(crate) fn new(dtc_subfunction: ReadDTCInfoSubFunction) -> Self { + /// Create a new `ReadDTCInfoRequest`. + #[must_use] + pub fn new(dtc_subfunction: ReadDTCInfoSubFunction) -> Self { Self { dtc_subfunction } } } @@ -196,17 +198,11 @@ impl ReadDTCInfoSubFunction { } } -type NumberOfDTCs = u16; /// Same representation as [`DTCStatusMask`] but with the bits 'on' representing the DTC status supported by the server /// IE if the server doesn't support [`DTCStatusMask::WarningIndicatorRequested`] then the bit for that status will be 'off' /// and all other bits will be 'on' type DTCStatusAvailabilityMask = DTCStatusMask; -/// Subfunction ID for the response -type SubFunctionID = u8; - -/// Response payloads can be shared among multiple request subfunctions - // --------------------------------------------------------------------------- // no_std RX types with lazy iterators // --------------------------------------------------------------------------- diff --git a/src/services/request_download.rs b/src/services/request_download.rs index 5bd884f..f458567 100644 --- a/src/services/request_download.rs +++ b/src/services/request_download.rs @@ -40,7 +40,12 @@ pub struct RequestDownloadRequest { } impl RequestDownloadRequest { - pub(crate) fn new( + /// Create a new `RequestDownloadRequest` + /// + /// # Errors + /// Returns an error if `memory_address` exceeds 5 bytes (> `0xFF_FFFF_FFFF`). + #[allow(clippy::cast_possible_truncation)] + pub fn new( data_format_identifier: DataFormatIdentifier, memory_address: u64, memory_size: u32, @@ -48,8 +53,14 @@ impl RequestDownloadRequest { if memory_address > 0xFF_FFFF_FFFF { return Err(Error::InvalidMemoryAddress(memory_address)); } - let address_and_length_format_identifier = - MemoryFormatIdentifier::from_values(memory_size, memory_address); + let memory_address_length = + (u64::BITS - memory_address.leading_zeros()).div_ceil(8) as u8; + let memory_size_length = + (u32::BITS - memory_size.leading_zeros()).div_ceil(8) as u8; + let address_and_length_format_identifier = MemoryFormatIdentifier { + memory_size_length, + memory_address_length, + }; Ok(Self { data_format_identifier, address_and_length_format_identifier, @@ -58,28 +69,6 @@ impl RequestDownloadRequest { }) } - fn get_shortened_memory_address(&self) -> Vec { - self.memory_address - .to_be_bytes() - .iter() - .skip( - 8 - self - .address_and_length_format_identifier - .memory_address_length as usize, - ) - .copied() - .collect() - } - - fn get_shortened_memory_size(&self) -> Vec { - self.memory_size - .to_be_bytes() - .iter() - .skip(4 - self.address_and_length_format_identifier.memory_size_length as usize) - .copied() - .collect() - } - /// Get the allowed [`NegativeResponseCode`] variants for this request #[must_use] pub fn allowed_nack_codes() -> &'static [NegativeResponseCode] { @@ -166,7 +155,9 @@ pub struct RequestDownloadResponse { } impl RequestDownloadResponse { - pub(crate) fn new(length_format_identifier: u8, max_number_of_block_length: Vec) -> Self { + /// Create a new `RequestDownloadResponse`. + #[must_use] + pub fn new(length_format_identifier: u8, max_number_of_block_length: Vec) -> Self { Self { length_format_identifier: LengthFormatIdentifier::from(length_format_identifier), max_number_of_block_length, @@ -263,12 +254,6 @@ mod tests { assert_eq!(req.memory_address, 0xF0FF_FF67); assert_eq!(req.memory_size, 0x0A); - - assert_eq!( - req.get_shortened_memory_address(), - vec![0xF0, 0xFF, 0xFF, 0x67] - ); - assert_eq!(req.get_shortened_memory_size(), vec![0x0A]); } #[test] diff --git a/src/services/routine_control.rs b/src/services/routine_control.rs index aeabc22..87e23d0 100644 --- a/src/services/routine_control.rs +++ b/src/services/routine_control.rs @@ -21,7 +21,8 @@ pub struct RoutineControlRequest { } impl RoutineControlRequest { - pub(crate) fn new( + /// Create a new `RoutineControlRequest`. + pub fn new( sub_function: RoutineControlSubFunction, routine_id: RI, data: Option, @@ -65,7 +66,8 @@ pub struct RoutineControlResponse { } impl RoutineControlResponse { - pub(crate) fn new( + /// Create a new `RoutineControlResponse`. + pub fn new( routine_control_type: RoutineControlSubFunction, routine_status_record: RSR, ) -> Self { diff --git a/src/services/tester_present.rs b/src/services/tester_present.rs index fcd2f0b..8e6b667 100644 --- a/src/services/tester_present.rs +++ b/src/services/tester_present.rs @@ -24,13 +24,6 @@ enum ZeroSubFunction { ISOSAEReserved(u8), } -impl ZeroSubFunction { - #[inline] - fn new() -> Self { - Self::default() - } -} - impl Default for ZeroSubFunction { #[inline] fn default() -> Self { @@ -69,8 +62,9 @@ pub struct TesterPresentRequest { impl TesterPresentRequest { /// Create a new `TesterPresentRequest` - pub(crate) fn new(suppress_positive_response: bool) -> Self { - Self::with_subfunction(suppress_positive_response, ZeroSubFunction::new()) + #[must_use] + pub fn new(suppress_positive_response: bool) -> Self { + Self::with_subfunction(suppress_positive_response, ZeroSubFunction::default()) } fn with_subfunction( @@ -136,13 +130,20 @@ pub struct TesterPresentResponse { impl TesterPresentResponse { /// Create a new `TesterPresentResponse` - pub(crate) fn new() -> Self { + #[must_use] + pub fn new() -> Self { Self { - zero_sub_function: ZeroSubFunction::new(), + zero_sub_function: ZeroSubFunction::default(), } } } +impl Default for TesterPresentResponse { + fn default() -> Self { + Self::new() + } +} + impl Encode for TesterPresentResponse { fn encoded_size(&self) -> usize { 1 diff --git a/src/services/write_data_by_identifier.rs b/src/services/write_data_by_identifier.rs index 5a4b479..35224cc 100644 --- a/src/services/write_data_by_identifier.rs +++ b/src/services/write_data_by_identifier.rs @@ -1,13 +1,5 @@ //! `WriteDataByIdentifier` (0x2E) service implementation -use crate::{Encode, Error, Identifier, NegativeResponseCode}; - -const WRITE_DID_NEGATIVE_RESPONSE_CODES: [NegativeResponseCode; 5] = [ - NegativeResponseCode::IncorrectMessageLengthOrInvalidFormat, - NegativeResponseCode::ConditionsNotCorrect, - NegativeResponseCode::RequestOutOfRange, - NegativeResponseCode::SecurityAccessDenied, - NegativeResponseCode::GeneralProgrammingFailure, -]; +use crate::{Encode, Error, Identifier}; /// See ISO-14229-1:2020, Section 11.7.2.1 #[cfg_attr(feature = "serde", derive(serde::Deserialize, serde::Serialize))] From 6d6723d803a29325bba283f242d9db13e593e5e8 Mon Sep 17 00:00:00 2001 From: Zach Heylmun Date: Tue, 26 May 2026 20:35:13 -0400 Subject: [PATCH 13/58] make crate buildable on bare-metal no_std targets Remove the unused `tracing` dependency, which pulled in `tracing-core` and required atomic CAS unavailable on targets like thumbv6m-none-eabi, silently blocking real embedded builds. Migrate remaining services off Vec/String to borrowed-slice Tx types, add Encode/Decode for the RequestFileTransfer types, and wire them into the Request/Response dispatch enums. Implement Encode on the Request and Response enums so a full message (SID byte + payload) can be framed, making encode/decode symmetric round-trips. Add a CI job that builds both no_std combos against thumbv6m-none-eabi and run clippy on the no_std/alloc feature combos as a guardrail. --- .github/workflows/ci.yml | 17 + Cargo.lock | 32 - Cargo.toml | 3 +- src/common/diagnostic_identifier.rs | 8 +- src/lib.rs | 51 +- src/protocol_definitions.rs | 3 +- src/request.rs | 69 +- src/response.rs | 106 ++- src/service.rs | 4 +- src/services/clear_dtc_information.rs | 4 +- src/services/communication_control.rs | 5 +- src/services/diagnostic_session_control.rs | 18 +- src/services/ecu_reset.rs | 8 +- src/services/mod.rs | 20 +- src/services/negative_response.rs | 15 +- src/services/read_data_by_identifier.rs | 111 +-- src/services/read_dtc_information.rs | 83 ++- src/services/request_download.rs | 45 +- src/services/request_file_transfer.rs | 742 +++++++++++++++++++-- src/services/routine_control.rs | 10 +- src/services/security_access.rs | 105 +-- src/services/tester_present.rs | 4 +- src/services/transfer_data.rs | 81 +-- 23 files changed, 1065 insertions(+), 479 deletions(-) diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml index d47c930..a60a34e 100644 --- a/.github/workflows/ci.yml +++ b/.github/workflows/ci.yml @@ -49,6 +49,21 @@ jobs: files: lcov.info fail_ci_if_error: true + no_std: + name: Build no_std (bare-metal) + runs-on: ubuntu-latest + timeout-minutes: 5 + steps: + - uses: actions/checkout@v5 + - uses: dtolnay/rust-toolchain@stable + with: + targets: thumbv6m-none-eabi + - uses: Swatinem/rust-cache@v2 + - name: Build no_std + no_alloc + run: cargo build --no-default-features --target thumbv6m-none-eabi + - name: Build no_std + alloc + run: cargo build --no-default-features --features alloc --target thumbv6m-none-eabi + lint: name: Run Clippy runs-on: ubuntu-latest @@ -59,6 +74,8 @@ jobs: - uses: Swatinem/rust-cache@v2 - run: rustup component add clippy - run: cargo clippy --all-features + - run: cargo clippy --no-default-features + - run: cargo clippy --no-default-features --features alloc format: name: Run Cargo Format diff --git a/Cargo.lock b/Cargo.lock index 57482ab..67b2757 100644 --- a/Cargo.lock +++ b/Cargo.lock @@ -178,24 +178,12 @@ version = "2.8.0" source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "f8ca58f447f06ed17d5fc4043ce1b10dd205e060fb3ce5b979b8ed8e59ff3f79" -[[package]] -name = "once_cell" -version = "1.21.4" -source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "9f7c3e4beb33f85d45ae3e3a1792185706c8e16d043238c593331cc7cd313b50" - [[package]] name = "once_cell_polyfill" version = "1.70.2" source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "384b8ab6d37215f3c5301a95a4accb5d64aa607f1fcb26a11b5303878451b4fe" -[[package]] -name = "pin-project-lite" -version = "0.2.17" -source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "a89322df9ebe1c1578d689c92318e070967d1042b512afbe49518723f4e6d5cd" - [[package]] name = "proc-macro2" version = "1.0.106" @@ -304,25 +292,6 @@ dependencies = [ "syn", ] -[[package]] -name = "tracing" -version = "0.1.44" -source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "63e71662fa4b2a2c3a26f570f037eb95bb1f85397f3cd8076caed2f026a6d100" -dependencies = [ - "pin-project-lite", - "tracing-core", -] - -[[package]] -name = "tracing-core" -version = "0.1.36" -source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "db97caf9d906fbde555dd62fa95ddba9eecfd14cb388e4f491a66d74cd5fb79a" -dependencies = [ - "once_cell", -] - [[package]] name = "uds_protocol" version = "0.1.0" @@ -334,7 +303,6 @@ dependencies = [ "serde", "serde_bytes", "thiserror", - "tracing", "utoipa", ] diff --git a/Cargo.toml b/Cargo.toml index 90576ff..eb4f9e9 100644 --- a/Cargo.toml +++ b/Cargo.toml @@ -20,7 +20,7 @@ authors = [ [features] default = ["std"] -std = ["alloc", "byteorder-embedded-io/std", "embedded-io/std", "thiserror/std", "tracing/std"] +std = ["alloc", "byteorder-embedded-io/std", "embedded-io/std", "thiserror/std"] alloc = [] serde = ["dep:serde", "dep:serde_bytes"] utoipa = ["dep:utoipa"] @@ -31,7 +31,6 @@ bitmask-enum = "2" byteorder-embedded-io = { version = "0.1", default-features = false, features = ["embedded-io"] } embedded-io = { version = "0.7", default-features = false } thiserror = { version = "2", default-features = false } -tracing = { version = "0.1", default-features = false } # Optional dependencies serde = { version = "1", optional = true, features = ["derive"] } serde_bytes = { version = "0.11", optional = true } diff --git a/src/common/diagnostic_identifier.rs b/src/common/diagnostic_identifier.rs index 06f136c..0f179f1 100644 --- a/src/common/diagnostic_identifier.rs +++ b/src/common/diagnostic_identifier.rs @@ -190,15 +190,15 @@ impl From for u16 { } } -impl std::fmt::Display for UDSIdentifier { - fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result { +impl core::fmt::Display for UDSIdentifier { + fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result { let value: u16 = (*self).into(); write!(f, "{value:#06X?}") } } -impl std::fmt::Debug for UDSIdentifier { - fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result { +impl core::fmt::Debug for UDSIdentifier { + fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result { let value: u16 = (*self).into(); write!(f, "{value:#06X}") } diff --git a/src/lib.rs b/src/lib.rs index 3e167c7..83910a4 100644 --- a/src/lib.rs +++ b/src/lib.rs @@ -9,17 +9,13 @@ mod error; pub use error::Error; mod traits; -pub use traits::{ - Decode, DecodeIter, DiagnosticDefinition, Encode, Identifier, RoutineIdentifier, -}; +pub use traits::{Decode, DecodeIter, DiagnosticDefinition, Encode, Identifier, RoutineIdentifier}; mod common; pub use common::*; mod protocol_definitions; -pub use protocol_definitions::{ - ProtocolIdentifier, ProtocolPayloadTx, ProtocolRoutinePayloadTx, -}; +pub use protocol_definitions::{ProtocolIdentifier, ProtocolPayloadTx, ProtocolRoutinePayloadTx}; mod request; pub use request::Request; @@ -201,6 +197,49 @@ mod no_std_api_tests { assert_eq!(u32::from(records[1].0), 0x040506); } + #[test] + fn request_frame_roundtrip_prepends_sid() { + // EcuReset request: SID=0x11, sub=0x01 + let wire = [0x11, 0x01]; + let (req, _) = Request::decode(&wire).unwrap(); + let mut buf = [0u8; 8]; + let written = Encode::encode(&req, &mut buf.as_mut_slice()).unwrap(); + assert_eq!(&buf[..written], &wire); + assert_eq!(written, req.encoded_size()); + } + + #[test] + fn response_frame_roundtrip_prepends_sid() { + // NegativeResponse: SID=0x7F, service=0x10, NRC=0x12 + let wire = [0x7F, 0x10, 0x12]; + let (resp, _) = Response::decode(&wire).unwrap(); + let mut buf = [0u8; 8]; + let written = Encode::encode(&resp, &mut buf.as_mut_slice()).unwrap(); + assert_eq!(&buf[..written], &wire); + assert_eq!(written, resp.encoded_size()); + } + + #[test] + fn request_file_transfer_frame_roundtrip() { + // RequestFileTransfer: SID=0x38, DeleteFile(0x02), name_len=0x0003, "abc" + let wire = [0x38, 0x02, 0x00, 0x03, b'a', b'b', b'c']; + let (req, _) = Request::decode(&wire).unwrap(); + assert_eq!(req.service(), UdsServiceType::RequestFileTransfer); + let mut buf = [0u8; 16]; + let written = Encode::encode(&req, &mut buf.as_mut_slice()).unwrap(); + assert_eq!(&buf[..written], &wire); + } + + #[test] + fn read_dtc_info_response_frame_roundtrip() { + // ReadDTCInfo response: SID=0x59, sub=0x02, mask=0xFF, then DTC records + let wire = [0x59, 0x02, 0xFF, 0x01, 0x02, 0x03, 0x0A]; + let (resp, _) = Response::decode(&wire).unwrap(); + let mut buf = [0u8; 16]; + let written = Encode::encode(&resp, &mut buf.as_mut_slice()).unwrap(); + assert_eq!(&buf[..written], &wire); + } + #[test] fn const_construction() { // Verify const construction works at compile time diff --git a/src/protocol_definitions.rs b/src/protocol_definitions.rs index ed30059..d3bca4d 100644 --- a/src/protocol_definitions.rs +++ b/src/protocol_definitions.rs @@ -1,6 +1,5 @@ use crate::{ - Decode, DecodeIter, Encode, Error, UDSIdentifier, - UDSRoutineIdentifier, impl_identifier, + Decode, DecodeIter, Encode, Error, UDSIdentifier, UDSRoutineIdentifier, impl_identifier, }; use core::ops::Deref; diff --git a/src/request.rs b/src/request.rs index 42622b3..5d9f12a 100644 --- a/src/request.rs +++ b/src/request.rs @@ -1,10 +1,11 @@ //! Module for making and handling UDS Requests use crate::{ - Decode, Error, + Decode, Encode, Error, services::{ ClearDiagnosticInfoRequest, CommunicationControlRequest, ControlDTCSettingsRequest, DiagnosticSessionControlRequest, EcuResetRequest, RequestDownloadRequest, - SecurityAccessRequestTx, TesterPresentRequest, TransferDataRequestTx, + RequestFileTransferRequestTx, SecurityAccessRequestTx, TesterPresentRequest, + TransferDataRequestTx, }, }; @@ -33,6 +34,8 @@ pub enum Request<'a> { ReadDTCInfo(&'a [u8]), /// Request download. RequestDownload(RequestDownloadRequest), + /// Request file transfer. + RequestFileTransfer(RequestFileTransferRequestTx<'a>), /// Request transfer exit. RequestTransferExit, /// Routine control request. Sub-function byte + raw payload. @@ -87,6 +90,10 @@ impl<'a> Decode<'a> for Request<'a> { let (req, _) = ::decode(payload)?; Self::RequestDownload(req) } + UdsServiceType::RequestFileTransfer => { + let (req, _) = ::decode(payload)?; + Self::RequestFileTransfer(req) + } UdsServiceType::RequestTransferExit => Self::RequestTransferExit, UdsServiceType::RoutineControl => { if payload.is_empty() { @@ -116,6 +123,63 @@ impl<'a> Decode<'a> for Request<'a> { } } +impl Encode for Request<'_> { + fn encoded_size(&self) -> usize { + let payload = match self { + Self::ClearDiagnosticInfo(req) => req.encoded_size(), + Self::CommunicationControl(req) => req.encoded_size(), + Self::ControlDTCSettings(req) => req.encoded_size(), + Self::DiagnosticSessionControl(req) => req.encoded_size(), + Self::EcuReset(req) => req.encoded_size(), + Self::ReadDataByIdentifier(bytes) + | Self::WriteDataByIdentifier(bytes) + | Self::ReadDTCInfo(bytes) => bytes.len(), + Self::RequestDownload(req) => req.encoded_size(), + Self::RequestFileTransfer(req) => req.encoded_size(), + Self::RequestTransferExit => 0, + Self::RoutineControl { raw_payload, .. } => 1 + raw_payload.len(), + Self::SecurityAccess(req) => req.encoded_size(), + Self::TesterPresent(req) => req.encoded_size(), + Self::TransferData(req) => req.encoded_size(), + }; + 1 + payload + } + + fn encode(&self, writer: &mut impl embedded_io::Write) -> Result { + writer + .write_all(&[self.service().request_service_to_byte()]) + .map_err(Error::io)?; + let payload = match self { + Self::ClearDiagnosticInfo(req) => req.encode(writer)?, + Self::CommunicationControl(req) => req.encode(writer)?, + Self::ControlDTCSettings(req) => req.encode(writer)?, + Self::DiagnosticSessionControl(req) => req.encode(writer)?, + Self::EcuReset(req) => req.encode(writer)?, + Self::ReadDataByIdentifier(bytes) + | Self::WriteDataByIdentifier(bytes) + | Self::ReadDTCInfo(bytes) => { + writer.write_all(bytes).map_err(Error::io)?; + bytes.len() + } + Self::RequestDownload(req) => req.encode(writer)?, + Self::RequestFileTransfer(req) => req.encode(writer)?, + Self::RequestTransferExit => 0, + Self::RoutineControl { + sub_function, + raw_payload, + } => { + writer.write_all(&[*sub_function]).map_err(Error::io)?; + writer.write_all(raw_payload).map_err(Error::io)?; + 1 + raw_payload.len() + } + Self::SecurityAccess(req) => req.encode(writer)?, + Self::TesterPresent(req) => req.encode(writer)?, + Self::TransferData(req) => req.encode(writer)?, + }; + Ok(1 + payload) + } +} + impl Request<'_> { /// Returns the [`UdsServiceType`] corresponding to this request variant. #[must_use] @@ -129,6 +193,7 @@ impl Request<'_> { Self::ReadDataByIdentifier(_) => UdsServiceType::ReadDataByIdentifier, Self::ReadDTCInfo(_) => UdsServiceType::ReadDTCInfo, Self::RequestDownload(_) => UdsServiceType::RequestDownload, + Self::RequestFileTransfer(_) => UdsServiceType::RequestFileTransfer, Self::RequestTransferExit => UdsServiceType::RequestTransferExit, Self::RoutineControl { .. } => UdsServiceType::RoutineControl, Self::SecurityAccess(_) => UdsServiceType::SecurityAccess, diff --git a/src/response.rs b/src/response.rs index daac835..13c09c1 100644 --- a/src/response.rs +++ b/src/response.rs @@ -1,8 +1,8 @@ use crate::{ CommunicationControlResponse, ControlDTCSettingsResponse, Decode, - DiagnosticSessionControlResponse, EcuResetResponse, Error, NegativeResponse, - ReadDTCInfoResponseRx, RequestDownloadResponseTx, SecurityAccessResponseTx, - TesterPresentResponse, TransferDataResponseTx, UdsServiceType, + DiagnosticSessionControlResponse, EcuResetResponse, Encode, Error, NegativeResponse, + ReadDTCInfoResponseRx, RequestDownloadResponseTx, RequestFileTransferResponseTx, + SecurityAccessResponseTx, TesterPresentResponse, TransferDataResponseTx, UdsServiceType, }; /// Parsed zero-copy UDS response. Borrows from the wire buffer. @@ -30,6 +30,8 @@ pub enum Response<'a> { ReadDTCInfo(ReadDTCInfoResponseRx<'a>), /// Positive response to `RequestDownload`. RequestDownload(RequestDownloadResponseTx<'a>), + /// Positive response to `RequestFileTransfer`. + RequestFileTransfer(RequestFileTransferResponseTx<'a>), /// Positive response to `RequestTransferExit`. RequestTransferExit, /// Positive response to `RoutineControl`. Raw status record bytes. @@ -68,8 +70,7 @@ impl<'a> Decode<'a> for Response<'a> { Self::ControlDTCSettings(resp) } UdsServiceType::DiagnosticSessionControl => { - let (resp, _) = - ::decode(payload)?; + let (resp, _) = ::decode(payload)?; Self::DiagnosticSessionControl(resp) } UdsServiceType::EcuReset => { @@ -89,6 +90,10 @@ impl<'a> Decode<'a> for Response<'a> { let (resp, _) = ::decode(payload)?; Self::RequestDownload(resp) } + UdsServiceType::RequestFileTransfer => { + let (resp, _) = ::decode(payload)?; + Self::RequestFileTransfer(resp) + } UdsServiceType::RequestTransferExit => Self::RequestTransferExit, UdsServiceType::RoutineControl => { if payload.is_empty() { @@ -118,6 +123,97 @@ impl<'a> Decode<'a> for Response<'a> { } } +impl Response<'_> { + /// Returns the response service-ID byte that frames this response on the wire. + fn response_sid(&self) -> u8 { + match self { + Self::ClearDiagnosticInfo => UdsServiceType::ClearDiagnosticInfo.response_to_byte(), + Self::CommunicationControl(_) => { + UdsServiceType::CommunicationControl.response_to_byte() + } + Self::ControlDTCSettings(_) => UdsServiceType::ControlDTCSettings.response_to_byte(), + Self::DiagnosticSessionControl(_) => { + UdsServiceType::DiagnosticSessionControl.response_to_byte() + } + Self::EcuReset(_) => UdsServiceType::EcuReset.response_to_byte(), + Self::NegativeResponse(_) => UdsServiceType::NegativeResponse.response_to_byte(), + Self::ReadDataByIdentifier(_) => { + UdsServiceType::ReadDataByIdentifier.response_to_byte() + } + Self::ReadDTCInfo(_) => UdsServiceType::ReadDTCInfo.response_to_byte(), + Self::RequestDownload(_) => UdsServiceType::RequestDownload.response_to_byte(), + Self::RequestFileTransfer(_) => UdsServiceType::RequestFileTransfer.response_to_byte(), + Self::RequestTransferExit => UdsServiceType::RequestTransferExit.response_to_byte(), + Self::RoutineControl { .. } => UdsServiceType::RoutineControl.response_to_byte(), + Self::SecurityAccess(_) => UdsServiceType::SecurityAccess.response_to_byte(), + Self::TesterPresent(_) => UdsServiceType::TesterPresent.response_to_byte(), + Self::TransferData(_) => UdsServiceType::TransferData.response_to_byte(), + Self::WriteDataByIdentifier(_) => { + UdsServiceType::WriteDataByIdentifier.response_to_byte() + } + } + } +} + +impl Encode for Response<'_> { + fn encoded_size(&self) -> usize { + let payload = match self { + Self::ClearDiagnosticInfo | Self::RequestTransferExit => 0, + Self::CommunicationControl(resp) => resp.encoded_size(), + Self::ControlDTCSettings(resp) => resp.encoded_size(), + Self::DiagnosticSessionControl(resp) => resp.encoded_size(), + Self::EcuReset(resp) => resp.encoded_size(), + Self::NegativeResponse(resp) => resp.encoded_size(), + Self::ReadDataByIdentifier(bytes) | Self::WriteDataByIdentifier(bytes) => bytes.len(), + Self::ReadDTCInfo(resp) => resp.encoded_size(), + Self::RequestDownload(resp) => resp.encoded_size(), + Self::RequestFileTransfer(resp) => resp.encoded_size(), + Self::RoutineControl { + raw_status_record, .. + } => 1 + raw_status_record.len(), + Self::SecurityAccess(resp) => resp.encoded_size(), + Self::TesterPresent(resp) => resp.encoded_size(), + Self::TransferData(resp) => resp.encoded_size(), + }; + 1 + payload + } + + fn encode(&self, writer: &mut impl embedded_io::Write) -> Result { + writer + .write_all(&[self.response_sid()]) + .map_err(Error::io)?; + let payload = match self { + Self::ClearDiagnosticInfo | Self::RequestTransferExit => 0, + Self::CommunicationControl(resp) => resp.encode(writer)?, + Self::ControlDTCSettings(resp) => resp.encode(writer)?, + Self::DiagnosticSessionControl(resp) => resp.encode(writer)?, + Self::EcuReset(resp) => resp.encode(writer)?, + Self::NegativeResponse(resp) => resp.encode(writer)?, + Self::ReadDataByIdentifier(bytes) | Self::WriteDataByIdentifier(bytes) => { + writer.write_all(bytes).map_err(Error::io)?; + bytes.len() + } + Self::ReadDTCInfo(resp) => resp.encode(writer)?, + Self::RequestDownload(resp) => resp.encode(writer)?, + Self::RequestFileTransfer(resp) => resp.encode(writer)?, + Self::RoutineControl { + routine_control_type, + raw_status_record, + } => { + writer + .write_all(&[*routine_control_type]) + .map_err(Error::io)?; + writer.write_all(raw_status_record).map_err(Error::io)?; + 1 + raw_status_record.len() + } + Self::SecurityAccess(resp) => resp.encode(writer)?, + Self::TesterPresent(resp) => resp.encode(writer)?, + Self::TransferData(resp) => resp.encode(writer)?, + }; + Ok(1 + payload) + } +} + /// Zero-copy raw RX response. Borrows from the wire buffer. #[derive(Clone, Debug)] pub struct UdsResponse<'a> { diff --git a/src/service.rs b/src/service.rs index 6db299f..475d527 100644 --- a/src/service.rs +++ b/src/service.rs @@ -283,8 +283,8 @@ impl UdsServiceType { } } -impl std::fmt::Display for UdsServiceType { - fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result { +impl core::fmt::Display for UdsServiceType { + fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result { write!(f, "{self:?}") } } diff --git a/src/services/clear_dtc_information.rs b/src/services/clear_dtc_information.rs index 31b7a61..b5f9780 100644 --- a/src/services/clear_dtc_information.rs +++ b/src/services/clear_dtc_information.rs @@ -1,7 +1,5 @@ //! `ClearDiagnosticInformation` (0x14) service implementation -use crate::{ - CLEAR_ALL_DTCS, DTCRecord, Decode, Encode, NegativeResponseCode, -}; +use crate::{CLEAR_ALL_DTCS, DTCRecord, Decode, Encode, NegativeResponseCode}; /// Negative response codes const CLEAR_DIAG_INFO_NEGATIVE_RESPONSE_CODES: [NegativeResponseCode; 4] = [ diff --git a/src/services/communication_control.rs b/src/services/communication_control.rs index dfe0866..cef0fdf 100644 --- a/src/services/communication_control.rs +++ b/src/services/communication_control.rs @@ -98,7 +98,10 @@ impl Encode for CommunicationControlRequest { fn encode(&self, writer: &mut impl embedded_io::Write) -> Result { writer - .write_all(&[u8::from(self.control_type), u8::from(self.communication_type)]) + .write_all(&[ + u8::from(self.control_type), + u8::from(self.communication_type), + ]) .map_err(Error::io)?; if let Some(id) = self.node_id { writer.write_all(&id.to_be_bytes()).map_err(Error::io)?; diff --git a/src/services/diagnostic_session_control.rs b/src/services/diagnostic_session_control.rs index aa51cb6..8ed8b4c 100644 --- a/src/services/diagnostic_session_control.rs +++ b/src/services/diagnostic_session_control.rs @@ -10,7 +10,8 @@ //! as well as in other operation conditions defined by the vehicle manufacturer (e.g. limp home operation condition). use crate::{ - Decode, DiagnosticSessionType, Encode, Error, NegativeResponseCode, SuppressablePositiveResponse, + Decode, DiagnosticSessionType, Encode, Error, NegativeResponseCode, + SuppressablePositiveResponse, }; const DIAGNOSTIC_SESSION_CONTROL_NEGATIVE_RESPONSE_CODES: [NegativeResponseCode; 3] = [ @@ -29,11 +30,8 @@ pub struct DiagnosticSessionControlRequest { impl DiagnosticSessionControlRequest { /// Create a new `DiagnosticSessionControlRequest` - #[must_use] - pub fn new( - suppress_positive_response: bool, - session_type: DiagnosticSessionType, - ) -> Self { + #[must_use] + pub fn new(suppress_positive_response: bool, session_type: DiagnosticSessionType) -> Self { Self { session_type: SuppressablePositiveResponse::new( suppress_positive_response, @@ -103,7 +101,7 @@ pub struct DiagnosticSessionControlResponse { impl DiagnosticSessionControlResponse { /// Create a new `DiagnosticSessionControlResponse` - #[must_use] + #[must_use] pub fn new( session_type: DiagnosticSessionType, p2_server_max: u16, @@ -162,8 +160,7 @@ mod request { #[test] fn test_diagnostic_session_control_request() { let bytes: [u8; 1] = [0x02]; - let (req, _) = - ::decode(&bytes).unwrap(); + let (req, _) = ::decode(&bytes).unwrap(); assert!(!req.suppress_positive_response()); assert_eq!( req.session_type(), @@ -185,8 +182,7 @@ mod response { #[test] fn test_diagnostic_session_control_response() { let bytes = [0x02, 0x11, 0x22, 0x33, 0x44]; - let (resp, _) = - ::decode(&bytes).unwrap(); + let (resp, _) = ::decode(&bytes).unwrap(); assert_eq!(resp.session_type, DiagnosticSessionType::ProgrammingSession); assert_eq!(resp.p2_server_max, 0x1122); assert_eq!(resp.p2_star_server_max, 0x3344); diff --git a/src/services/ecu_reset.rs b/src/services/ecu_reset.rs index e9c82b5..5a90f00 100644 --- a/src/services/ecu_reset.rs +++ b/src/services/ecu_reset.rs @@ -1,7 +1,5 @@ //! `ECUReset` (0x11) service implementation -use crate::{ - Decode, Encode, Error, NegativeResponseCode, ResetType, SuppressablePositiveResponse, -}; +use crate::{Decode, Encode, Error, NegativeResponseCode, ResetType, SuppressablePositiveResponse}; const ECU_RESET_NEGATIVE_RESPONSE_CODES: [NegativeResponseCode; 4] = [ NegativeResponseCode::SubFunctionNotSupported, @@ -20,7 +18,7 @@ pub struct EcuResetRequest { impl EcuResetRequest { /// Create a new '`EcuResetRequest`' - #[must_use] + #[must_use] pub fn new(suppress_positive_response: bool, reset_type: ResetType) -> Self { Self { reset_type: SuppressablePositiveResponse::new(suppress_positive_response, reset_type), @@ -87,7 +85,7 @@ pub struct EcuResetResponse { impl EcuResetResponse { /// Create a new '`EcuResetResponse`' - #[must_use] + #[must_use] pub fn new(reset_type: ResetType, power_down_time: u8) -> Self { Self { reset_type, diff --git a/src/services/mod.rs b/src/services/mod.rs index 21d6934..21a4a24 100644 --- a/src/services/mod.rs +++ b/src/services/mod.rs @@ -19,9 +19,7 @@ mod negative_response; pub use negative_response::NegativeResponse; mod read_data_by_identifier; -pub use read_data_by_identifier::{ - ReadDataByIdentifierRequest, ReadDataByIdentifierRequestTx, ReadDataByIdentifierResponse, -}; +pub use read_data_by_identifier::ReadDataByIdentifierRequestTx; mod read_dtc_information; pub use read_dtc_information::{ @@ -30,31 +28,25 @@ pub use read_dtc_information::{ }; mod request_download; -pub use request_download::{ - RequestDownloadRequest, RequestDownloadResponse, RequestDownloadResponseTx, -}; +pub use request_download::{RequestDownloadRequest, RequestDownloadResponseTx}; mod request_file_transfer; pub use request_file_transfer::{ - FileOperationMode, RequestFileTransferRequest, RequestFileTransferResponse, + DirSizePayload, FileOperationMode, FileSizePayload, NamePayloadTx, PositionPayload, + RequestFileTransferRequestTx, RequestFileTransferResponseTx, SentDataPayloadTx, SizePayload, }; mod routine_control; pub use routine_control::{RoutineControlRequest, RoutineControlResponse}; mod security_access; -pub use security_access::{ - SecurityAccessRequest, SecurityAccessRequestTx, SecurityAccessResponse, - SecurityAccessResponseTx, -}; +pub use security_access::{SecurityAccessRequestTx, SecurityAccessResponseTx}; mod tester_present; pub use tester_present::{TesterPresentRequest, TesterPresentResponse}; mod transfer_data; -pub use transfer_data::{ - TransferDataRequest, TransferDataRequestTx, TransferDataResponse, TransferDataResponseTx, -}; +pub use transfer_data::{TransferDataRequestTx, TransferDataResponseTx}; mod write_data_by_identifier; pub use write_data_by_identifier::{WriteDataByIdentifierRequest, WriteDataByIdentifierResponse}; diff --git a/src/services/negative_response.rs b/src/services/negative_response.rs index 1177009..34a6a56 100644 --- a/src/services/negative_response.rs +++ b/src/services/negative_response.rs @@ -1,7 +1,5 @@ //! `NegativeResponse` (0x7F) service implementation -use crate::{ - Decode, Encode, Error, NegativeResponseCode, UdsServiceType, -}; +use crate::{Decode, Encode, Error, NegativeResponseCode, UdsServiceType}; /// A negative response from the server indicating a request could not be fulfilled #[cfg_attr(feature = "serde", derive(serde::Deserialize, serde::Serialize))] @@ -17,7 +15,7 @@ pub struct NegativeResponse { impl NegativeResponse { /// Create a new `NegativeResponse` - #[must_use] + #[must_use] pub fn new(request_service: UdsServiceType, nrc: NegativeResponseCode) -> Self { Self { request_service, @@ -49,7 +47,12 @@ impl<'a> Decode<'a> for NegativeResponse { } let request_service = UdsServiceType::service_from_request_byte(buf[0]); let nrc = NegativeResponseCode::from(buf[1]); - Ok((Self { request_service, nrc }, &buf[2..])) + Ok(( + Self { + request_service, + nrc, + }, + &buf[2..], + )) } } - diff --git a/src/services/read_data_by_identifier.rs b/src/services/read_data_by_identifier.rs index a5f415f..d5eb7a2 100644 --- a/src/services/read_data_by_identifier.rs +++ b/src/services/read_data_by_identifier.rs @@ -1,7 +1,5 @@ //! `ReadDataByIdentifier` (0x22) service implementation -use crate::{ - Encode, Error, Identifier, NegativeResponseCode, -}; +use crate::{Encode, Error, Identifier, NegativeResponseCode}; const READ_DID_NEGATIVE_RESPONSE_CODES: [NegativeResponseCode; 5] = [ NegativeResponseCode::IncorrectMessageLengthOrInvalidFormat, @@ -11,86 +9,9 @@ const READ_DID_NEGATIVE_RESPONSE_CODES: [NegativeResponseCode; 5] = [ NegativeResponseCode::SecurityAccessDenied, ]; -/// See ISO-14229-1:2020, Table 11.2.1 for format information -#[cfg_attr(feature = "serde", derive(serde::Deserialize, serde::Serialize))] -#[cfg_attr(feature = "utoipa", derive(utoipa::ToSchema))] -#[derive(Clone, Debug, Eq, PartialEq)] -#[non_exhaustive] -pub struct ReadDataByIdentifierRequest { - /// The list of Data Identifiers to read. - pub dids: Vec, -} - -impl ReadDataByIdentifierRequest { - /// Create a new request from a sequence of data identifiers - pub fn new(dids: I) -> Self - where - I: IntoIterator, - { - let dids = dids.into_iter().collect(); - Self { dids } - } - - /// Get the allowed Nack codes for this request - #[must_use] - pub fn allowed_nack_codes() -> &'static [NegativeResponseCode] { - &READ_DID_NEGATIVE_RESPONSE_CODES - } -} - -impl Encode for ReadDataByIdentifierRequest { - fn encoded_size(&self) -> usize { - self.dids.len() * 2 - } - - fn encode(&self, writer: &mut impl embedded_io::Write) -> Result { - for did in &self.dids { - Encode::encode(did, writer)?; - } - Ok(self.encoded_size()) - } -} - -/// See ISO-14229-1:2020, Table 11.2.3 for format information -#[cfg_attr(feature = "serde", derive(serde::Deserialize, serde::Serialize))] -#[cfg_attr(feature = "utoipa", derive(utoipa::ToSchema))] -#[derive(Clone, Eq, PartialEq)] -#[non_exhaustive] -pub struct ReadDataByIdentifierResponse { - /// The decoded payload entries returned by the server. - pub data: Vec, -} - -impl ReadDataByIdentifierResponse { - /// Create a new response from an iterator of payloads. - pub fn new(data: I) -> Self - where - I: IntoIterator, - { - let data = data.into_iter().collect(); - Self { data } - } -} - -impl Encode for ReadDataByIdentifierResponse { - fn encoded_size(&self) -> usize { - self.data.iter().map(Encode::encoded_size).sum() - } - - fn encode(&self, writer: &mut impl embedded_io::Write) -> Result { - let mut total = 0; - for item in &self.data { - total += Encode::encode(item, writer)?; - } - Ok(total) - } -} - -// --------------------------------------------------------------------------- -// no_std TX type (borrow from caller) -// --------------------------------------------------------------------------- - /// Zero-alloc TX request to read data by identifier. Borrows DID list from caller. +/// +/// See ISO-14229-1:2020, Table 11.2.1 for format information #[derive(Clone, Copy, Debug, Eq, PartialEq)] pub struct ReadDataByIdentifierRequestTx<'d, DataIdentifier> { /// The list of Data Identifiers to read. @@ -103,6 +24,12 @@ impl<'d, DataIdentifier: Identifier> ReadDataByIdentifierRequestTx<'d, DataIdent pub const fn new(dids: &'d [DataIdentifier]) -> Self { Self { dids } } + + /// Get the allowed Nack codes for this request + #[must_use] + pub fn allowed_nack_codes() -> &'static [NegativeResponseCode] { + &READ_DID_NEGATIVE_RESPONSE_CODES + } } impl Encode for ReadDataByIdentifierRequestTx<'_, DataIdentifier> { @@ -118,14 +45,6 @@ impl Encode for ReadDataByIdentifierRequestTx<'_, Da } } -impl core::fmt::Debug - for ReadDataByIdentifierResponse -{ - fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result { - write!(f, "ReadDataByIdentifierResponse\n{:?}", self.data) - } -} - #[cfg(test)] mod test { use super::*; @@ -142,16 +61,4 @@ mod test { let written = Encode::encode(&req, &mut buf.as_mut_slice()).unwrap(); assert_eq!(written, 4); // 2 DIDs * 2 bytes each } - - #[test] - fn encode_read_did_request_alloc() { - let ids = vec![ - ProtocolIdentifier::new(UDSIdentifier::BootSoftwareIdentification), - ProtocolIdentifier::new(UDSIdentifier::ActiveDiagnosticSession), - ]; - let req = ReadDataByIdentifierRequest::new(ids); - let mut buf = [0u8; 16]; - let written = Encode::encode(&req, &mut buf.as_mut_slice()).unwrap(); - assert_eq!(written, 4); - } } diff --git a/src/services/read_dtc_information.rs b/src/services/read_dtc_information.rs index 243a195..4fb7f07 100644 --- a/src/services/read_dtc_information.rs +++ b/src/services/read_dtc_information.rs @@ -2,8 +2,8 @@ use crate::{ DTCExtDataRecordNumber, DTCFormatIdentifier, DTCRecord, DTCSeverityMask, - DTCSnapshotRecordNumber, - DTCStatusMask, DTCStoredDataRecordNumber, Decode, Error, FunctionalGroupIdentifier, + DTCSnapshotRecordNumber, DTCStatusMask, DTCStoredDataRecordNumber, Decode, Encode, Error, + FunctionalGroupIdentifier, }; /// Used for non-emissions related servers @@ -281,9 +281,7 @@ impl<'a> DtcFaultDetectionIter<'a> { /// # Errors /// Returns an error if the byte data contains a partial record. #[cfg(feature = "alloc")] - pub fn collect_all( - self, - ) -> Result, Error> { + pub fn collect_all(self) -> Result, Error> { self.collect() } } @@ -298,8 +296,7 @@ impl Iterator for DtcFaultDetectionIter<'_> { if self.remaining.len() < 4 { return Some(Err(Error::IncorrectMessageLengthOrInvalidFormat)); } - let dtc_record = - DTCRecord::new(self.remaining[0], self.remaining[1], self.remaining[2]); + let dtc_record = DTCRecord::new(self.remaining[0], self.remaining[1], self.remaining[2]); let dtc_fault_detection_counter = self.remaining[3]; self.remaining = &self.remaining[4..]; Some(Ok(DTCFaultDetectionCounterRecord { @@ -485,12 +482,7 @@ impl<'a> Decode<'a> for ReadDTCInfoResponseRx<'a> { &[], )) } - 0x14 => Ok(( - Self::DTCFaultDetectionCounterList { - raw_records: buf, - }, - &[], - )), + 0x14 => Ok((Self::DTCFaultDetectionCounterList { raw_records: buf }, &[])), 0x08 | 0x09 => { if buf.is_empty() { return Err(Error::InsufficientData(2)); @@ -529,3 +521,68 @@ impl<'a> Decode<'a> for ReadDTCInfoResponseRx<'a> { } } +impl Encode for ReadDTCInfoResponseRx<'_> { + fn encoded_size(&self) -> usize { + match self { + Self::NumberOfDTCs { .. } => 4, + Self::DTCList { raw_records, .. } | Self::DTCSeverityList { raw_records, .. } => { + 2 + raw_records.len() + } + Self::DTCFaultDetectionCounterList { raw_records } => 1 + raw_records.len(), + Self::WWHOBDDTCByMaskRecord { raw_records, .. } => 5 + raw_records.len(), + } + } + + fn encode(&self, writer: &mut impl embedded_io::Write) -> Result { + match self { + Self::NumberOfDTCs { + sub_function_id, + status_availability_mask, + count, + } => { + writer + .write_all(&[*sub_function_id, status_availability_mask.bits()]) + .map_err(Error::io)?; + writer.write_all(&count.to_be_bytes()).map_err(Error::io)?; + } + Self::DTCList { + sub_function_id, + status_availability_mask, + raw_records, + } + | Self::DTCSeverityList { + sub_function_id, + status_availability_mask, + raw_records, + } => { + writer + .write_all(&[*sub_function_id, status_availability_mask.bits()]) + .map_err(Error::io)?; + writer.write_all(raw_records).map_err(Error::io)?; + } + Self::DTCFaultDetectionCounterList { raw_records } => { + writer.write_all(&[0x14]).map_err(Error::io)?; + writer.write_all(raw_records).map_err(Error::io)?; + } + Self::WWHOBDDTCByMaskRecord { + functional_group_identifier, + status_availability_mask, + severity_availability_mask, + format_identifier, + raw_records, + } => { + writer + .write_all(&[ + 0x42, + u8::from(*functional_group_identifier), + status_availability_mask.bits(), + severity_availability_mask.bits(), + u8::from(*format_identifier), + ]) + .map_err(Error::io)?; + writer.write_all(raw_records).map_err(Error::io)?; + } + } + Ok(self.encoded_size()) + } +} diff --git a/src/services/request_download.rs b/src/services/request_download.rs index f458567..5fa2166 100644 --- a/src/services/request_download.rs +++ b/src/services/request_download.rs @@ -16,7 +16,7 @@ const REQUEST_DOWNLOAD_NEGATIVE_RESPONSE_CODES: [NegativeResponseCode; 6] = [ /// A request to the server for it to download data from the client /// -/// A positive response to this request ([`RequestDownloadResponse`]) will happen +/// A positive response to this request ([`RequestDownloadResponseTx`]) will happen /// after the server takes all necessary actions to receive the data once the server is ready to receive /// /// This is a variable length Request, determined by the `address_and_length_format_identifier` value @@ -34,7 +34,7 @@ pub struct RequestDownloadRequest { /// Has a variable number of bytes, max of 5 pub memory_address: u64, /// Size of the data to be downloaded. Number of bytes sent is determined by `address_and_length_format_identifier` - /// Used by the server to validate the data transferred by the [`TransferDataRequest`](crate::TransferDataRequest) service + /// Used by the server to validate the data transferred by the [`TransferDataRequestTx`](crate::TransferDataRequestTx) service /// Has a variable number of bytes, max of 4 pub memory_size: u32, } @@ -53,10 +53,8 @@ impl RequestDownloadRequest { if memory_address > 0xFF_FFFF_FFFF { return Err(Error::InvalidMemoryAddress(memory_address)); } - let memory_address_length = - (u64::BITS - memory_address.leading_zeros()).div_ceil(8) as u8; - let memory_size_length = - (u32::BITS - memory_size.leading_zeros()).div_ceil(8) as u8; + let memory_address_length = (u64::BITS - memory_address.leading_zeros()).div_ceil(8) as u8; + let memory_size_length = (u32::BITS - memory_size.leading_zeros()).div_ceil(8) as u8; let address_and_length_format_identifier = MemoryFormatIdentifier { memory_size_length, memory_address_length, @@ -90,7 +88,9 @@ impl Encode for RequestDownloadRequest { // Write shortened memory address using a stack buffer instead of Vec let addr_bytes = self.memory_address.to_be_bytes(); - let addr_len = self.address_and_length_format_identifier.memory_address_length as usize; + let addr_len = self + .address_and_length_format_identifier + .memory_address_length as usize; writer .write_all(&addr_bytes[8 - addr_len..]) .map_err(Error::io)?; @@ -140,36 +140,9 @@ impl<'a> Decode<'a> for RequestDownloadRequest { } } -/// Positive response to a [`RequestDownloadRequest`] indicating the server is ready to receive data. -#[cfg_attr(feature = "serde", derive(serde::Deserialize, serde::Serialize))] -#[cfg_attr(feature = "utoipa", derive(utoipa::ToSchema))] -#[derive(Clone, Debug, PartialEq)] -#[non_exhaustive] -pub struct RequestDownloadResponse { - /// Format is similar to `address_and_length_format_identifier` field of the [`RequestDownloadRequest`] struct. - /// In it is a byte with the high nibble being the length of the `max_number_of_block_length` field. - length_format_identifier: LengthFormatIdentifier, - /// Maximum number of bytes to include in each [`TransferDataRequest`](crate::TransferDataRequest). - /// Variable length, determined by `length_format_identifier`. - pub max_number_of_block_length: Vec, -} - -impl RequestDownloadResponse { - /// Create a new `RequestDownloadResponse`. - #[must_use] - pub fn new(length_format_identifier: u8, max_number_of_block_length: Vec) -> Self { - Self { - length_format_identifier: LengthFormatIdentifier::from(length_format_identifier), - max_number_of_block_length, - } - } -} - -// --------------------------------------------------------------------------- -// no_std TX type for RequestDownloadResponse (borrow from caller) -// --------------------------------------------------------------------------- - /// Zero-alloc TX response for request download. Borrows from the caller. +/// +/// Positive response to a [`RequestDownloadRequest`] indicating the server is ready to receive data. #[derive(Clone, Copy, Debug, PartialEq)] pub struct RequestDownloadResponseTx<'d> { length_format_identifier: LengthFormatIdentifier, diff --git a/src/services/request_file_transfer.rs b/src/services/request_file_transfer.rs index 5088206..c25207a 100644 --- a/src/services/request_file_transfer.rs +++ b/src/services/request_file_transfer.rs @@ -1,6 +1,6 @@ //! `RequestFileTransfer` (0x38) service implementation -use crate::{DataFormatIdentifier, Error}; +use crate::{DataFormatIdentifier, Decode, Encode, Error}; ///////////////////////////////////////// - Request - /////////////////////////////////////////////////// /// Mode of operation for file transfer requests @@ -58,7 +58,7 @@ impl TryFrom for FileOperationMode { } /// Holds the sizes of the file to be transferred (if applicable) -/// Used for both [`RequestFileTransferRequest`] and [`RequestFileTransferResponse`] +/// Used for both [`RequestFileTransferRequestTx`] and [`RequestFileTransferResponseTx`] /// /// | | [AddFile] | [DeleteFile] | [ReplaceFile] | [ReadFile] | [ReadDir] | [ResumeFile] | /// |--------------|-----------|--------------|---------------|------------|-----------|--------------| @@ -71,12 +71,12 @@ impl TryFrom for FileOperationMode { /// [ReadFile]: FileOperationMode::ReadFile /// [ReadDir]: FileOperationMode::ReadDir /// [ResumeFile]: FileOperationMode::ResumeFile -/// [Request]: RequestFileTransferRequest (RequestFileTransferRequest) -/// [Response]: RequestFileTransferResponse (RequestFileTransferResponse) +/// [Request]: RequestFileTransferRequestTx +/// [Response]: RequestFileTransferResponseTx #[allow(clippy::struct_field_names)] #[cfg_attr(feature = "serde", derive(serde::Deserialize, serde::Serialize))] #[cfg_attr(feature = "utoipa", derive(utoipa::ToSchema))] -#[derive(Clone, Debug, PartialEq)] +#[derive(Clone, Copy, Debug, PartialEq)] pub struct SizePayload { /// Length in bytes for both `file_size_uncompressed` and `file_size_compressed` /// @@ -106,7 +106,9 @@ pub struct SizePayload { pub file_size_compressed: u128, } -/// Payload used for all [`RequestFileTransfer` requests][RequestFileTransferRequest] +/// Payload used for all [`RequestFileTransferRequestTx`] requests. +/// +/// Borrows `file_path_and_name` from the caller. /// /// #### ***Request*** Message /// | | [AddFile] | [DeleteFile] | [ReplaceFile] | [ReadFile] | [ReadDir] | [ResumeFile] | @@ -119,21 +121,19 @@ pub struct SizePayload { /// [ReadFile]: FileOperationMode::ReadFile /// [ReadDir]: FileOperationMode::ReadDir /// [ResumeFile]: FileOperationMode::ResumeFile -/// [Request]: RequestFileTransferRequest (RequestFileTransferRequest) +/// [Request]: RequestFileTransferRequestTx #[cfg_attr(feature = "serde", derive(serde::Deserialize, serde::Serialize))] #[cfg_attr(feature = "utoipa", derive(utoipa::ToSchema))] -#[derive(Clone, Debug, PartialEq)] -pub struct NamePayload { +#[derive(Clone, Copy, Debug, PartialEq)] +pub struct NamePayloadTx<'a> { /// 0x01 - 0x06, the type of operation to be applied to the file or directory specified in `file_path_and_name` - /// - /// Duplicated as we need to read and store it somewhere - mode_of_operation: FileOperationMode, + pub mode_of_operation: FileOperationMode, /// Length in bytes of the `file_path_and_name` field - file_path_and_name_length: u16, + pub file_path_and_name_length: u16, /// The path and name of the file or directory on the server - file_path_and_name: String, + pub file_path_and_name: &'a str, } /// A request to the server to transfer a file, either upload or download. @@ -151,28 +151,28 @@ pub struct NamePayload { /// there is no need to use the `TransferData` or [`crate::UdsServiceType::RequestTransferExit`] services. #[cfg_attr(feature = "serde", derive(serde::Deserialize, serde::Serialize))] #[cfg_attr(feature = "utoipa", derive(utoipa::ToSchema))] -#[derive(Clone, Debug, PartialEq)] +#[derive(Clone, Copy, Debug, PartialEq)] #[non_exhaustive] -pub enum RequestFileTransferRequest { +pub enum RequestFileTransferRequestTx<'a> { /// Add a file to the server - AddFile(NamePayload, DataFormatIdentifier, SizePayload), + AddFile(NamePayloadTx<'a>, DataFormatIdentifier, SizePayload), /// Delete the specified file from the server - DeleteFile(NamePayload), + DeleteFile(NamePayloadTx<'a>), /// Replace the specified file on the server, if it does not exist, add it - ReplaceFile(NamePayload, DataFormatIdentifier, SizePayload), + ReplaceFile(NamePayloadTx<'a>, DataFormatIdentifier, SizePayload), /// Read the specified file from the server (upload) - ReadFile(NamePayload, DataFormatIdentifier), + ReadFile(NamePayloadTx<'a>, DataFormatIdentifier), /// Read the directory from the server /// Implies that the request does not include a `fileName` - ReadDir(NamePayload), + ReadDir(NamePayloadTx<'a>), /// Resume a file transfer at the returned `filePosition` indicator /// The file must already exist in the ECU's filesystem - ResumeFile(NamePayload, DataFormatIdentifier, SizePayload), + ResumeFile(NamePayloadTx<'a>, DataFormatIdentifier, SizePayload), } ///////////////////////////////////////// - Response - /////////////////////////////////////////////////// @@ -189,13 +189,13 @@ pub enum RequestFileTransferRequest { /// [ReadFile]: FileOperationMode::ReadFile /// [ReadDir]: FileOperationMode::ReadDir /// [ResumeFile]: FileOperationMode::ResumeFile -/// [Response]: RequestFileTransferRequest (RequestFileTransferResponse) +/// [Response]: RequestFileTransferResponseTx #[cfg_attr(feature = "serde", derive(serde::Deserialize, serde::Serialize))] #[cfg_attr(feature = "utoipa", derive(utoipa::ToSchema))] -#[derive(Clone, Debug, PartialEq)] -pub struct SentDataPayload { +#[derive(Clone, Copy, Debug, PartialEq)] +pub struct SentDataPayloadTx<'a> { /// Not related to `RequestDownload` - length_format_identifier: u8, + pub length_format_identifier: u8, /// This parameter is used by the requestFileTransfer positive response message to inform the client how many /// data bytes (maxNumberOfBlockLength) to include in each `TransferData` request message from the client or how /// many data bytes the server will include in a `TransferData` positive response when uploading data. This length @@ -212,7 +212,7 @@ pub struct SentDataPayload { /// affect the memory address of where the subsequent transferData request data would be written. /// If the modeOfOperation parameter equals to 0x02 (`DeleteFile`) this parameter shall be not be included in the /// response message. - pub max_number_of_block_length: Vec, + pub max_number_of_block_length: &'a [u8], } /// Used to inform the client of the size of the file to be transferred @@ -227,11 +227,11 @@ pub struct SentDataPayload { /// [ReadFile]: FileOperationMode::ReadFile /// [ReadDir]: FileOperationMode::ReadDir /// [ResumeFile]: FileOperationMode::ResumeFile -/// [Response]: RequestFileTransferRequest (RequestFileTransferResponse) +/// [Response]: RequestFileTransferResponseTx #[allow(clippy::struct_field_names)] #[cfg_attr(feature = "serde", derive(serde::Deserialize, serde::Serialize))] #[cfg_attr(feature = "utoipa", derive(utoipa::ToSchema))] -#[derive(Clone, Debug, PartialEq)] +#[derive(Clone, Copy, Debug, PartialEq)] pub struct FileSizePayload { /// Length in bytes of both `file_size_uncompressed` and `file_size_compressed`. pub file_size_parameter_length: u16, @@ -253,10 +253,10 @@ pub struct FileSizePayload { /// [ReadFile]: FileOperationMode::ReadFile /// [ReadDir]: FileOperationMode::ReadDir /// [ResumeFile]: FileOperationMode::ResumeFile -/// [Response]: RequestFileTransferRequest (RequestFileTransferResponse) +/// [Response]: RequestFileTransferResponseTx #[cfg_attr(feature = "serde", derive(serde::Deserialize, serde::Serialize))] #[cfg_attr(feature = "utoipa", derive(utoipa::ToSchema))] -#[derive(Clone, Debug, PartialEq)] +#[derive(Clone, Copy, Debug, PartialEq)] pub struct DirSizePayload { /// Length in bytes of the `dir_info_length` field. pub dir_info_parameter_length: u16, @@ -276,13 +276,13 @@ pub struct DirSizePayload { /// [ReadFile]: FileOperationMode::ReadFile /// [ReadDir]: FileOperationMode::ReadDir /// [ResumeFile]: FileOperationMode::ResumeFile -/// [Response]: RequestFileTransferRequest (RequestFileTransferResponse) +/// [Response]: RequestFileTransferResponseTx #[cfg_attr(feature = "serde", derive(serde::Deserialize, serde::Serialize))] #[cfg_attr(feature = "utoipa", derive(utoipa::ToSchema))] #[derive(Clone, Copy, Debug, PartialEq)] pub struct PositionPayload { /// Specifies the byte position within the file at which the Tester will resume downloading after an initial download is suspended - /// A download is suspended when the ECU stops receiving [`crate::TransferDataRequest`] requests and does not receive the + /// A download is suspended when the ECU stops receiving [`crate::TransferDataRequestTx`] requests and does not receive the /// `RequestTransferExit` request to end the transfer before returning to the default session /// /// Fixed size: 8 bytes @@ -292,44 +292,495 @@ pub struct PositionPayload { pub file_position: u64, } -/// Response to a [`RequestFileTransferRequest`] from the server +/// Response to a [`RequestFileTransferRequestTx`] from the server /// -/// The server will respond with a [`RequestFileTransferResponse`] to indicate the status of the request +/// The server will respond with a [`RequestFileTransferResponseTx`] to indicate the status of the request /// `DataFormatIdentifier` - Echoes the value of the request #[cfg_attr(feature = "serde", derive(serde::Deserialize, serde::Serialize))] #[cfg_attr(feature = "utoipa", derive(utoipa::ToSchema))] -#[derive(Clone, Debug, PartialEq)] +#[derive(Clone, Copy, Debug, PartialEq)] #[non_exhaustive] -pub enum RequestFileTransferResponse { +pub enum RequestFileTransferResponseTx<'a> { /// Positive response to an [`AddFile`](FileOperationMode::AddFile) request. - AddFile(FileOperationMode, SentDataPayload, DataFormatIdentifier), + AddFile( + FileOperationMode, + SentDataPayloadTx<'a>, + DataFormatIdentifier, + ), /// Positive response to a [`DeleteFile`](FileOperationMode::DeleteFile) request. DeleteFile(FileOperationMode), /// Positive response to a [`ReplaceFile`](FileOperationMode::ReplaceFile) request. - ReplaceFile(FileOperationMode, SentDataPayload, DataFormatIdentifier), + ReplaceFile( + FileOperationMode, + SentDataPayloadTx<'a>, + DataFormatIdentifier, + ), /// Positive response to a [`ReadFile`](FileOperationMode::ReadFile) request, including file size. ReadFile( FileOperationMode, - SentDataPayload, + SentDataPayloadTx<'a>, DataFormatIdentifier, FileSizePayload, ), /// Positive response to a [`ReadDir`](FileOperationMode::ReadDir) request, including directory size. ReadDir( FileOperationMode, - SentDataPayload, + SentDataPayloadTx<'a>, DataFormatIdentifier, DirSizePayload, ), /// Positive response to a [`ResumeFile`](FileOperationMode::ResumeFile) request, including file position. ResumeFile( FileOperationMode, - SentDataPayload, + SentDataPayloadTx<'a>, DataFormatIdentifier, PositionPayload, ), } +// --------------------------------------------------------------------------- +// Encode / Decode impls +// --------------------------------------------------------------------------- + +// `file_size_parameter_length` must fit in a u128 (≤ 16 bytes per value). +const U128_MAX_BYTES: usize = 16; + +impl Encode for NamePayloadTx<'_> { + fn encoded_size(&self) -> usize { + 1 + 2 + self.file_path_and_name.len() + } + + fn encode(&self, writer: &mut impl embedded_io::Write) -> Result { + writer + .write_all(&[u8::from(self.mode_of_operation)]) + .map_err(Error::io)?; + writer + .write_all(&self.file_path_and_name_length.to_be_bytes()) + .map_err(Error::io)?; + writer + .write_all(self.file_path_and_name.as_bytes()) + .map_err(Error::io)?; + Ok(self.encoded_size()) + } +} + +impl<'a> Decode<'a> for NamePayloadTx<'a> { + fn decode(buf: &'a [u8]) -> Result<(Self, &'a [u8]), Error> { + if buf.len() < 3 { + return Err(Error::InsufficientData(3)); + } + let mode_of_operation = FileOperationMode::try_from(buf[0])?; + let file_path_and_name_length = u16::from_be_bytes([buf[1], buf[2]]); + let name_len = file_path_and_name_length as usize; + let total = 3 + name_len; + if buf.len() < total { + return Err(Error::InsufficientData(total)); + } + let file_path_and_name = core::str::from_utf8(&buf[3..total]) + .map_err(|_| Error::IncorrectMessageLengthOrInvalidFormat)?; + Ok(( + Self { + mode_of_operation, + file_path_and_name_length, + file_path_and_name, + }, + &buf[total..], + )) + } +} + +impl Encode for SizePayload { + fn encoded_size(&self) -> usize { + 1 + 2 * self.file_size_parameter_length as usize + } + + fn encode(&self, writer: &mut impl embedded_io::Write) -> Result { + let n = self.file_size_parameter_length as usize; + if n > U128_MAX_BYTES { + return Err(Error::IncorrectMessageLengthOrInvalidFormat); + } + writer + .write_all(&[self.file_size_parameter_length]) + .map_err(Error::io)?; + let uncompressed = self.file_size_uncompressed.to_be_bytes(); + let compressed = self.file_size_compressed.to_be_bytes(); + writer + .write_all(&uncompressed[U128_MAX_BYTES - n..]) + .map_err(Error::io)?; + writer + .write_all(&compressed[U128_MAX_BYTES - n..]) + .map_err(Error::io)?; + Ok(self.encoded_size()) + } +} + +impl<'a> Decode<'a> for SizePayload { + fn decode(buf: &'a [u8]) -> Result<(Self, &'a [u8]), Error> { + if buf.is_empty() { + return Err(Error::InsufficientData(1)); + } + let file_size_parameter_length = buf[0]; + let n = file_size_parameter_length as usize; + if n > U128_MAX_BYTES { + return Err(Error::IncorrectMessageLengthOrInvalidFormat); + } + let total = 1 + 2 * n; + if buf.len() < total { + return Err(Error::InsufficientData(total)); + } + let mut u_bytes = [0u8; U128_MAX_BYTES]; + u_bytes[U128_MAX_BYTES - n..].copy_from_slice(&buf[1..=n]); + let mut c_bytes = [0u8; U128_MAX_BYTES]; + c_bytes[U128_MAX_BYTES - n..].copy_from_slice(&buf[1 + n..total]); + Ok(( + Self { + file_size_parameter_length, + file_size_uncompressed: u128::from_be_bytes(u_bytes), + file_size_compressed: u128::from_be_bytes(c_bytes), + }, + &buf[total..], + )) + } +} + +impl Encode for SentDataPayloadTx<'_> { + fn encoded_size(&self) -> usize { + 1 + self.max_number_of_block_length.len() + } + + fn encode(&self, writer: &mut impl embedded_io::Write) -> Result { + writer + .write_all(&[self.length_format_identifier]) + .map_err(Error::io)?; + writer + .write_all(self.max_number_of_block_length) + .map_err(Error::io)?; + Ok(self.encoded_size()) + } +} + +impl<'a> Decode<'a> for SentDataPayloadTx<'a> { + fn decode(buf: &'a [u8]) -> Result<(Self, &'a [u8]), Error> { + if buf.is_empty() { + return Err(Error::InsufficientData(1)); + } + let length_format_identifier = buf[0]; + let n = length_format_identifier as usize; + let total = 1 + n; + if buf.len() < total { + return Err(Error::InsufficientData(total)); + } + Ok(( + Self { + length_format_identifier, + max_number_of_block_length: &buf[1..total], + }, + &buf[total..], + )) + } +} + +impl Encode for FileSizePayload { + fn encoded_size(&self) -> usize { + 2 + 2 * self.file_size_parameter_length as usize + } + + fn encode(&self, writer: &mut impl embedded_io::Write) -> Result { + let n = self.file_size_parameter_length as usize; + if n > U128_MAX_BYTES { + return Err(Error::IncorrectMessageLengthOrInvalidFormat); + } + writer + .write_all(&self.file_size_parameter_length.to_be_bytes()) + .map_err(Error::io)?; + let uncompressed = self.file_size_uncompressed.to_be_bytes(); + let compressed = self.file_size_compressed.to_be_bytes(); + writer + .write_all(&uncompressed[U128_MAX_BYTES - n..]) + .map_err(Error::io)?; + writer + .write_all(&compressed[U128_MAX_BYTES - n..]) + .map_err(Error::io)?; + Ok(self.encoded_size()) + } +} + +impl<'a> Decode<'a> for FileSizePayload { + fn decode(buf: &'a [u8]) -> Result<(Self, &'a [u8]), Error> { + if buf.len() < 2 { + return Err(Error::InsufficientData(2)); + } + let file_size_parameter_length = u16::from_be_bytes([buf[0], buf[1]]); + let n = file_size_parameter_length as usize; + if n > U128_MAX_BYTES { + return Err(Error::IncorrectMessageLengthOrInvalidFormat); + } + let total = 2 + 2 * n; + if buf.len() < total { + return Err(Error::InsufficientData(total)); + } + let mut u_bytes = [0u8; U128_MAX_BYTES]; + u_bytes[U128_MAX_BYTES - n..].copy_from_slice(&buf[2..2 + n]); + let mut c_bytes = [0u8; U128_MAX_BYTES]; + c_bytes[U128_MAX_BYTES - n..].copy_from_slice(&buf[2 + n..total]); + Ok(( + Self { + file_size_parameter_length, + file_size_uncompressed: u128::from_be_bytes(u_bytes), + file_size_compressed: u128::from_be_bytes(c_bytes), + }, + &buf[total..], + )) + } +} + +impl Encode for DirSizePayload { + fn encoded_size(&self) -> usize { + 2 + self.dir_info_parameter_length as usize + } + + fn encode(&self, writer: &mut impl embedded_io::Write) -> Result { + let n = self.dir_info_parameter_length as usize; + if n > U128_MAX_BYTES { + return Err(Error::IncorrectMessageLengthOrInvalidFormat); + } + writer + .write_all(&self.dir_info_parameter_length.to_be_bytes()) + .map_err(Error::io)?; + let bytes = self.dir_info_length.to_be_bytes(); + writer + .write_all(&bytes[U128_MAX_BYTES - n..]) + .map_err(Error::io)?; + Ok(self.encoded_size()) + } +} + +impl<'a> Decode<'a> for DirSizePayload { + fn decode(buf: &'a [u8]) -> Result<(Self, &'a [u8]), Error> { + if buf.len() < 2 { + return Err(Error::InsufficientData(2)); + } + let dir_info_parameter_length = u16::from_be_bytes([buf[0], buf[1]]); + let n = dir_info_parameter_length as usize; + if n > U128_MAX_BYTES { + return Err(Error::IncorrectMessageLengthOrInvalidFormat); + } + let total = 2 + n; + if buf.len() < total { + return Err(Error::InsufficientData(total)); + } + let mut bytes = [0u8; U128_MAX_BYTES]; + bytes[U128_MAX_BYTES - n..].copy_from_slice(&buf[2..total]); + Ok(( + Self { + dir_info_parameter_length, + dir_info_length: u128::from_be_bytes(bytes), + }, + &buf[total..], + )) + } +} + +impl Encode for PositionPayload { + fn encoded_size(&self) -> usize { + 8 + } + + fn encode(&self, writer: &mut impl embedded_io::Write) -> Result { + writer + .write_all(&self.file_position.to_be_bytes()) + .map_err(Error::io)?; + Ok(8) + } +} + +impl<'a> Decode<'a> for PositionPayload { + fn decode(buf: &'a [u8]) -> Result<(Self, &'a [u8]), Error> { + if buf.len() < 8 { + return Err(Error::InsufficientData(8)); + } + let file_position = u64::from_be_bytes([ + buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6], buf[7], + ]); + Ok((Self { file_position }, &buf[8..])) + } +} + +impl Encode for RequestFileTransferRequestTx<'_> { + fn encoded_size(&self) -> usize { + match self { + Self::AddFile(name, _, size) + | Self::ReplaceFile(name, _, size) + | Self::ResumeFile(name, _, size) => name.encoded_size() + 1 + size.encoded_size(), + Self::ReadFile(name, _) => name.encoded_size() + 1, + Self::DeleteFile(name) | Self::ReadDir(name) => name.encoded_size(), + } + } + + fn encode(&self, writer: &mut impl embedded_io::Write) -> Result { + let mut len; + match self { + Self::AddFile(name, dfi, size) + | Self::ReplaceFile(name, dfi, size) + | Self::ResumeFile(name, dfi, size) => { + len = name.encode(writer)?; + writer.write_all(&[u8::from(*dfi)]).map_err(Error::io)?; + len += 1; + len += size.encode(writer)?; + } + Self::ReadFile(name, dfi) => { + len = name.encode(writer)?; + writer.write_all(&[u8::from(*dfi)]).map_err(Error::io)?; + len += 1; + } + Self::DeleteFile(name) | Self::ReadDir(name) => { + len = name.encode(writer)?; + } + } + Ok(len) + } +} + +impl<'a> Decode<'a> for RequestFileTransferRequestTx<'a> { + fn decode(buf: &'a [u8]) -> Result<(Self, &'a [u8]), Error> { + let (name, rest) = NamePayloadTx::decode(buf)?; + match name.mode_of_operation { + FileOperationMode::DeleteFile => Ok((Self::DeleteFile(name), rest)), + FileOperationMode::ReadDir => Ok((Self::ReadDir(name), rest)), + FileOperationMode::ReadFile => { + if rest.is_empty() { + return Err(Error::InsufficientData(1)); + } + let dfi = DataFormatIdentifier::from(rest[0]); + Ok((Self::ReadFile(name, dfi), &rest[1..])) + } + mode @ (FileOperationMode::AddFile + | FileOperationMode::ReplaceFile + | FileOperationMode::ResumeFile) => { + if rest.is_empty() { + return Err(Error::InsufficientData(1)); + } + let dfi = DataFormatIdentifier::from(rest[0]); + let (size, rest) = SizePayload::decode(&rest[1..])?; + let value = match mode { + FileOperationMode::AddFile => Self::AddFile(name, dfi, size), + FileOperationMode::ReplaceFile => Self::ReplaceFile(name, dfi, size), + FileOperationMode::ResumeFile => Self::ResumeFile(name, dfi, size), + _ => unreachable!(), + }; + Ok((value, rest)) + } + FileOperationMode::ISOSAEReserved(b) => Err(Error::InvalidFileOperationMode(b)), + } + } +} + +impl Encode for RequestFileTransferResponseTx<'_> { + fn encoded_size(&self) -> usize { + match self { + Self::DeleteFile(_) => 1, + Self::AddFile(_, sent, _) | Self::ReplaceFile(_, sent, _) => { + 1 + sent.encoded_size() + 1 + } + Self::ReadFile(_, sent, _, fs) => 1 + sent.encoded_size() + 1 + fs.encoded_size(), + Self::ReadDir(_, sent, _, ds) => 1 + sent.encoded_size() + 1 + ds.encoded_size(), + Self::ResumeFile(_, sent, _, pos) => 1 + sent.encoded_size() + 1 + pos.encoded_size(), + } + } + + fn encode(&self, writer: &mut impl embedded_io::Write) -> Result { + let mut len = 1; + match self { + Self::DeleteFile(mode) => { + writer.write_all(&[u8::from(*mode)]).map_err(Error::io)?; + } + Self::AddFile(mode, sent, dfi) | Self::ReplaceFile(mode, sent, dfi) => { + writer.write_all(&[u8::from(*mode)]).map_err(Error::io)?; + len += sent.encode(writer)?; + writer.write_all(&[u8::from(*dfi)]).map_err(Error::io)?; + len += 1; + } + Self::ReadFile(mode, sent, dfi, fs) => { + writer.write_all(&[u8::from(*mode)]).map_err(Error::io)?; + len += sent.encode(writer)?; + writer.write_all(&[u8::from(*dfi)]).map_err(Error::io)?; + len += 1; + len += fs.encode(writer)?; + } + Self::ReadDir(mode, sent, dfi, ds) => { + writer.write_all(&[u8::from(*mode)]).map_err(Error::io)?; + len += sent.encode(writer)?; + writer.write_all(&[u8::from(*dfi)]).map_err(Error::io)?; + len += 1; + len += ds.encode(writer)?; + } + Self::ResumeFile(mode, sent, dfi, pos) => { + writer.write_all(&[u8::from(*mode)]).map_err(Error::io)?; + len += sent.encode(writer)?; + writer.write_all(&[u8::from(*dfi)]).map_err(Error::io)?; + len += 1; + len += pos.encode(writer)?; + } + } + Ok(len) + } +} + +impl<'a> Decode<'a> for RequestFileTransferResponseTx<'a> { + fn decode(buf: &'a [u8]) -> Result<(Self, &'a [u8]), Error> { + if buf.is_empty() { + return Err(Error::InsufficientData(1)); + } + let mode = FileOperationMode::try_from(buf[0])?; + let rest = &buf[1..]; + match mode { + FileOperationMode::DeleteFile => Ok((Self::DeleteFile(mode), rest)), + FileOperationMode::AddFile | FileOperationMode::ReplaceFile => { + let (sent, rest) = SentDataPayloadTx::decode(rest)?; + if rest.is_empty() { + return Err(Error::InsufficientData(1)); + } + let dfi = DataFormatIdentifier::from(rest[0]); + let rest = &rest[1..]; + let value = match mode { + FileOperationMode::AddFile => Self::AddFile(mode, sent, dfi), + FileOperationMode::ReplaceFile => Self::ReplaceFile(mode, sent, dfi), + _ => unreachable!(), + }; + Ok((value, rest)) + } + FileOperationMode::ReadFile => { + let (sent, rest) = SentDataPayloadTx::decode(rest)?; + if rest.is_empty() { + return Err(Error::InsufficientData(1)); + } + let dfi = DataFormatIdentifier::from(rest[0]); + let (fs, rest) = FileSizePayload::decode(&rest[1..])?; + Ok((Self::ReadFile(mode, sent, dfi, fs), rest)) + } + FileOperationMode::ReadDir => { + let (sent, rest) = SentDataPayloadTx::decode(rest)?; + if rest.is_empty() { + return Err(Error::InsufficientData(1)); + } + let dfi = DataFormatIdentifier::from(rest[0]); + let (ds, rest) = DirSizePayload::decode(&rest[1..])?; + Ok((Self::ReadDir(mode, sent, dfi, ds), rest)) + } + FileOperationMode::ResumeFile => { + let (sent, rest) = SentDataPayloadTx::decode(rest)?; + if rest.is_empty() { + return Err(Error::InsufficientData(1)); + } + let dfi = DataFormatIdentifier::from(rest[0]); + let (pos, rest) = PositionPayload::decode(&rest[1..])?; + Ok((Self::ResumeFile(mode, sent, dfi, pos), rest)) + } + FileOperationMode::ISOSAEReserved(b) => Err(Error::InvalidFileOperationMode(b)), + } + } +} + #[cfg(test)] mod request_tests { use super::*; @@ -349,6 +800,209 @@ mod request_tests { ); } - // NOTE: The remaining request/response tests for RequestFileTransfer have been - // removed because this service has not yet been migrated to the new Encode/Decode traits. + fn name_payload(mode: FileOperationMode, path: &str) -> NamePayloadTx<'_> { + NamePayloadTx { + mode_of_operation: mode, + file_path_and_name_length: path.len() as u16, + file_path_and_name: path, + } + } + + #[test] + fn name_payload_roundtrip() { + let path = "/tmp/foo.bin"; + let n = name_payload(FileOperationMode::AddFile, path); + let mut buf = [0u8; 64]; + let written = Encode::encode(&n, &mut buf.as_mut_slice()).unwrap(); + assert_eq!(written, n.encoded_size()); + let (decoded, rest) = NamePayloadTx::decode(&buf[..written]).unwrap(); + assert!(rest.is_empty()); + assert_eq!(decoded, n); + } + + #[test] + fn size_payload_roundtrip() { + let s = SizePayload { + file_size_parameter_length: 9, + file_size_uncompressed: (u64::MAX as u128) + 1000, + file_size_compressed: 0x12_3456, + }; + let mut buf = [0u8; 32]; + let written = Encode::encode(&s, &mut buf.as_mut_slice()).unwrap(); + assert_eq!(written, s.encoded_size()); + let (decoded, rest) = SizePayload::decode(&buf[..written]).unwrap(); + assert!(rest.is_empty()); + assert_eq!(decoded, s); + } + + #[test] + fn add_file_request_roundtrip() { + let path = "test.txt"; + let req = RequestFileTransferRequestTx::AddFile( + name_payload(FileOperationMode::AddFile, path), + DataFormatIdentifier::from(0x00), + SizePayload { + file_size_parameter_length: 2, + file_size_uncompressed: 0x1234, + file_size_compressed: 0x1234, + }, + ); + let mut buf = [0u8; 64]; + let written = Encode::encode(&req, &mut buf.as_mut_slice()).unwrap(); + assert_eq!(written, req.encoded_size()); + let (decoded, rest) = RequestFileTransferRequestTx::decode(&buf[..written]).unwrap(); + assert!(rest.is_empty()); + assert_eq!(decoded, req); + } + + #[test] + fn delete_file_request_roundtrip() { + let path = "/var/tmp/delete_file.bin"; + let req = RequestFileTransferRequestTx::DeleteFile(name_payload( + FileOperationMode::DeleteFile, + path, + )); + let mut buf = [0u8; 64]; + let written = Encode::encode(&req, &mut buf.as_mut_slice()).unwrap(); + assert_eq!(written, req.encoded_size()); + let (decoded, rest) = RequestFileTransferRequestTx::decode(&buf[..written]).unwrap(); + assert!(rest.is_empty()); + assert_eq!(decoded, req); + } + + #[test] + fn read_file_request_roundtrip() { + let path = "/etc/passwd"; + let req = RequestFileTransferRequestTx::ReadFile( + name_payload(FileOperationMode::ReadFile, path), + DataFormatIdentifier::from(0x11), + ); + let mut buf = [0u8; 64]; + let written = Encode::encode(&req, &mut buf.as_mut_slice()).unwrap(); + assert_eq!(written, req.encoded_size()); + let (decoded, rest) = RequestFileTransferRequestTx::decode(&buf[..written]).unwrap(); + assert!(rest.is_empty()); + assert_eq!(decoded, req); + } + + #[test] + fn read_dir_request_roundtrip() { + let path = "/var/log"; + let req = + RequestFileTransferRequestTx::ReadDir(name_payload(FileOperationMode::ReadDir, path)); + let mut buf = [0u8; 64]; + let written = Encode::encode(&req, &mut buf.as_mut_slice()).unwrap(); + let (decoded, _) = RequestFileTransferRequestTx::decode(&buf[..written]).unwrap(); + assert_eq!(decoded, req); + } + + #[test] + fn resume_file_request_roundtrip() { + let path = "/big/file.bin"; + let req = RequestFileTransferRequestTx::ResumeFile( + name_payload(FileOperationMode::ResumeFile, path), + DataFormatIdentifier::from(0x00), + SizePayload { + file_size_parameter_length: 4, + file_size_uncompressed: 0xDEAD_BEEF, + file_size_compressed: 0xDEAD_BEEF, + }, + ); + let mut buf = [0u8; 64]; + let written = Encode::encode(&req, &mut buf.as_mut_slice()).unwrap(); + let (decoded, _) = RequestFileTransferRequestTx::decode(&buf[..written]).unwrap(); + assert_eq!(decoded, req); + } +} + +#[cfg(test)] +mod response_tests { + use super::*; + + fn sent_data<'a>(block: &'a [u8]) -> SentDataPayloadTx<'a> { + SentDataPayloadTx { + length_format_identifier: block.len() as u8, + max_number_of_block_length: block, + } + } + + #[test] + fn add_file_response_roundtrip() { + let block = [0x10u8, 0x00]; + let resp = RequestFileTransferResponseTx::AddFile( + FileOperationMode::AddFile, + sent_data(&block), + DataFormatIdentifier::from(0x00), + ); + let mut buf = [0u8; 32]; + let written = Encode::encode(&resp, &mut buf.as_mut_slice()).unwrap(); + assert_eq!(written, resp.encoded_size()); + let (decoded, rest) = RequestFileTransferResponseTx::decode(&buf[..written]).unwrap(); + assert!(rest.is_empty()); + assert_eq!(decoded, resp); + } + + #[test] + fn delete_file_response_roundtrip() { + let resp = RequestFileTransferResponseTx::DeleteFile(FileOperationMode::DeleteFile); + let mut buf = [0u8; 8]; + let written = Encode::encode(&resp, &mut buf.as_mut_slice()).unwrap(); + assert_eq!(written, 1); + let (decoded, _) = RequestFileTransferResponseTx::decode(&buf[..written]).unwrap(); + assert_eq!(decoded, resp); + } + + #[test] + fn read_file_response_roundtrip() { + let block = [0x04u8, 0x00]; + let resp = RequestFileTransferResponseTx::ReadFile( + FileOperationMode::ReadFile, + sent_data(&block), + DataFormatIdentifier::from(0x00), + FileSizePayload { + file_size_parameter_length: 4, + file_size_uncompressed: 0xAABB_CCDD, + file_size_compressed: 0x1122_3344, + }, + ); + let mut buf = [0u8; 64]; + let written = Encode::encode(&resp, &mut buf.as_mut_slice()).unwrap(); + let (decoded, _) = RequestFileTransferResponseTx::decode(&buf[..written]).unwrap(); + assert_eq!(decoded, resp); + } + + #[test] + fn read_dir_response_roundtrip() { + let block = [0x04u8, 0x00]; + let resp = RequestFileTransferResponseTx::ReadDir( + FileOperationMode::ReadDir, + sent_data(&block), + DataFormatIdentifier::from(0x00), + DirSizePayload { + dir_info_parameter_length: 4, + dir_info_length: 0x1234_5678, + }, + ); + let mut buf = [0u8; 64]; + let written = Encode::encode(&resp, &mut buf.as_mut_slice()).unwrap(); + let (decoded, _) = RequestFileTransferResponseTx::decode(&buf[..written]).unwrap(); + assert_eq!(decoded, resp); + } + + #[test] + fn resume_file_response_roundtrip() { + let block = [0x04u8, 0x00]; + let resp = RequestFileTransferResponseTx::ResumeFile( + FileOperationMode::ResumeFile, + sent_data(&block), + DataFormatIdentifier::from(0x00), + PositionPayload { + file_position: 0xDEAD_BEEF_CAFE_BABE, + }, + ); + let mut buf = [0u8; 64]; + let written = Encode::encode(&resp, &mut buf.as_mut_slice()).unwrap(); + let (decoded, _) = RequestFileTransferResponseTx::decode(&buf[..written]).unwrap(); + assert_eq!(decoded, resp); + } } diff --git a/src/services/routine_control.rs b/src/services/routine_control.rs index 87e23d0..57f9b91 100644 --- a/src/services/routine_control.rs +++ b/src/services/routine_control.rs @@ -2,9 +2,7 @@ //! //! It can also be used to check the ECU's health, erase memory, or other custom manufacturer/supplier routines. //! However, some routines may have side effects or require certain preconditions to be met. -use crate::{ - Encode, Error, Identifier, RoutineControlSubFunction, -}; +use crate::{Encode, Error, Identifier, RoutineControlSubFunction}; /// Used by a client to execute a defined sequence of events and obtain any relevant results #[cfg_attr(feature = "serde", derive(serde::Deserialize, serde::Serialize))] @@ -22,11 +20,7 @@ pub struct RoutineControlRequest { impl RoutineControlRequest { /// Create a new `RoutineControlRequest`. - pub fn new( - sub_function: RoutineControlSubFunction, - routine_id: RI, - data: Option, - ) -> Self { + pub fn new(sub_function: RoutineControlSubFunction, routine_id: RI, data: Option) -> Self { Self { sub_function, routine_id, diff --git a/src/services/security_access.rs b/src/services/security_access.rs index 4442176..39e4e02 100644 --- a/src/services/security_access.rs +++ b/src/services/security_access.rs @@ -34,87 +34,7 @@ const SECURITY_ACCESS_NEGATIVE_RESPONSE_CODES: [NegativeResponseCode; 8] = [ /// The server will then validate the key and respond with a positive or negative response. /// Successful verification of the key will result in the server unlocking the requested security level. /// Suppressing a positive response to this request is allowed. -#[cfg_attr(feature = "serde", derive(serde::Deserialize, serde::Serialize))] -#[cfg_attr(feature = "utoipa", derive(utoipa::ToSchema))] -#[derive(Clone, Debug, Eq, PartialEq)] -#[non_exhaustive] -pub struct SecurityAccessRequest { - access_type: SuppressablePositiveResponse, - request_data: Vec, -} - -impl SecurityAccessRequest { - /// Create a new '`SecurityAccessRequest`' - pub(crate) fn new( - suppress_positive_response: bool, - access_type: SecurityAccessType, - request_data: Vec, - ) -> Self { - Self { - access_type: SuppressablePositiveResponse::new(suppress_positive_response, access_type), - request_data, - } - } - - /// Getter for whether a positive response should be suppressed - #[must_use] - pub fn suppress_positive_response(&self) -> bool { - self.access_type.suppress_positive_response() - } - - /// Getter for the requested [`SecurityAccessType`] - #[must_use] - pub fn access_type(&self) -> SecurityAccessType { - self.access_type.value() - } - - /// Getter for the request data - #[must_use] - pub fn request_data(&self) -> &[u8] { - &self.request_data - } - - /// Get the allowed [`NegativeResponseCode`] variants for this request - #[must_use] - pub fn allowed_nack_codes() -> &'static [NegativeResponseCode] { - &SECURITY_ACCESS_NEGATIVE_RESPONSE_CODES - } -} - -/// Response to `SecurityAccessRequest` -/// -/// ## Request Seed -/// -/// When responding to a seed request, the `security_seed` field shall contain the seed value. /// -/// ## Send Key -/// -/// The positive response to a `SendKey` request shall not have any data in the security seed field. -#[cfg_attr(feature = "serde", derive(serde::Deserialize, serde::Serialize))] -#[cfg_attr(feature = "utoipa", derive(utoipa::ToSchema))] -#[derive(Clone, Debug, Eq, PartialEq)] -#[non_exhaustive] -pub struct SecurityAccessResponse { - /// The security access type echoed from the request. - pub access_type: SecurityAccessType, - /// The security seed bytes (empty for a `SendKey` positive response). - pub security_seed: Vec, -} - -impl SecurityAccessResponse { - /// Create a new '`SecurityAccessResponse`' - pub(crate) fn new(access_type: SecurityAccessType, security_seed: Vec) -> Self { - Self { - access_type, - security_seed, - } - } -} - -// --------------------------------------------------------------------------- -// no_std TX types (borrow from caller) -// --------------------------------------------------------------------------- - /// Zero-alloc TX request for security access. Borrows from the caller. #[derive(Clone, Copy, Debug, Eq, PartialEq)] pub struct SecurityAccessRequestTx<'d> { @@ -154,15 +74,10 @@ impl<'d> SecurityAccessRequestTx<'d> { self.request_data } - /// Convert to the owned (allocating) [`SecurityAccessRequest`]. - #[cfg(feature = "alloc")] + /// Get the allowed [`NegativeResponseCode`] variants for this request #[must_use] - pub fn to_owned(&self) -> SecurityAccessRequest { - SecurityAccessRequest::new( - self.suppress_positive_response(), - self.access_type(), - self.request_data.to_vec(), - ) + pub fn allowed_nack_codes() -> &'static [NegativeResponseCode] { + &SECURITY_ACCESS_NEGATIVE_RESPONSE_CODES } } @@ -220,15 +135,6 @@ impl<'d> SecurityAccessResponseTx<'d> { } } -impl SecurityAccessResponseTx<'_> { - /// Convert to the owned (allocating) [`SecurityAccessResponse`]. - #[cfg(feature = "alloc")] - #[must_use] - pub fn to_owned(&self) -> SecurityAccessResponse { - SecurityAccessResponse::new(self.access_type, self.security_seed.to_vec()) - } -} - impl Encode for SecurityAccessResponseTx<'_> { fn encoded_size(&self) -> usize { 1 + self.security_seed.len() @@ -272,10 +178,7 @@ mod request { ]; let (req, _) = ::decode(&bytes).unwrap(); - assert_eq!( - req.access_type(), - SecurityAccessType::RequestSeed(0x01) - ); + assert_eq!(req.access_type(), SecurityAccessType::RequestSeed(0x01)); assert_eq!(req.request_data(), &[0x00, 0x01, 0x02, 0x03, 0x04]); let mut buf = Vec::new(); diff --git a/src/services/tester_present.rs b/src/services/tester_present.rs index 8e6b667..8c15db6 100644 --- a/src/services/tester_present.rs +++ b/src/services/tester_present.rs @@ -1,7 +1,5 @@ //! `TesterPresent` (0x3E) service implementation -use crate::{ - Decode, Encode, Error, NegativeResponseCode, SuppressablePositiveResponse, -}; +use crate::{Decode, Encode, Error, NegativeResponseCode, SuppressablePositiveResponse}; const TESTER_PRESENT_NEGATIVE_RESPONSE_CODES: [NegativeResponseCode; 2] = [ NegativeResponseCode::SubFunctionNotSupported, diff --git a/src/services/transfer_data.rs b/src/services/transfer_data.rs index 5aa37a6..046d67b 100644 --- a/src/services/transfer_data.rs +++ b/src/services/transfer_data.rs @@ -8,78 +8,19 @@ use crate::{Decode, Encode, Error}; /// 34 .. 11 .. 33 .. 60 20 00 .. 00 FF FF << -- Bytes sent by the client /// RID .. DFI .. ALFID .. `MA_B`# .. `UCMS_B`# /// -/// Step 1 Response: The server sends a [`RequestDownloadResponse`](crate::RequestDownloadResponse) or `RequestUploadResponse` message to the client +/// Step 1 Response: The server sends a [`RequestDownloadResponseTx`](crate::RequestDownloadResponseTx) or `RequestUploadResponse` message to the client /// -/// Step 2: The client shall send many `TransferDataRequest` messages written in blocks +/// Step 2: The client shall send many [`TransferDataRequestTx`] messages written in blocks /// to the server with a max number of bytes equal to `MNROB_B`# from the `RequestDownloadResponse` message /// 74 .. 20 .. 00 81 /// RSID .. LFID .. `MNROB_B`# /// -/// Step 2 Response: The server sends a [`crate::TransferDataResponse`] message confirming the block sequence +/// Step 2 Response: The server sends a [`TransferDataResponseTx`] message confirming the block sequence /// /// Step 3: The client sends a [`crate::UdsServiceType::RequestTransferExit`] message to the server (SID 0x37) /// /// Step 3 Response: The server sends a [`crate::UdsServiceType::RequestTransferExit`] response message to the client (RID 0x77) -#[cfg_attr(feature = "serde", derive(serde::Deserialize, serde::Serialize))] -#[cfg_attr(feature = "utoipa", derive(utoipa::ToSchema))] -#[derive(Clone, Debug, PartialEq)] -#[non_exhaustive] -pub struct TransferDataRequest { - /// Starts at 0x01 from the server when a `RequestDownload` or `RequestUpload` or `RequestFileTransfer` is received - /// Increments by 0x01 for each `TransferDataRequest` message - /// At 0xFF the counter wraps around to 0x00 - pub block_sequence_counter: u8, - /// The data to be transferred, the server sends the amount of data (# of bytes) it can handle in the - /// [`crate::RequestDownloadResponse`] message - pub data: Vec, -} - -impl TransferDataRequest { - pub(crate) fn new(block_sequence_counter: u8, data: Vec) -> Self { - Self { - block_sequence_counter, - data, - } - } -} - -/// Positive response to a [`TransferDataRequest`]. -#[cfg_attr(feature = "serde", derive(serde::Deserialize, serde::Serialize))] -#[cfg_attr(feature = "utoipa", derive(utoipa::ToSchema))] -#[derive(Clone, Debug, PartialEq)] -#[non_exhaustive] -pub struct TransferDataResponse { - /// Starts at 0x01 from the server when a `RequestDownload` or `RequestUpload` or `RequestFileTransfer` is received - /// Increments by 0x01 for each `TransferDataRequest` message - /// At 0xFF the counter wraps around to 0x00 - /// - /// This is an ECHO of the `block_sequence_counter` from the [`TransferDataRequest`] message - /// Check against the request to ensure the correct block is being acknowledged - /// If the `block_sequence_counter` is not as expected or does not arrive, the client should retransmit the block - pub block_sequence_counter: u8, - - /// Contains data required by the client to support the transfer of data. - /// Vehicle manufacturer specific - /// - /// For download (client to server), this might be a checksum for the client to verify correct transfer - /// This should not repeat the data sent from the client - /// For upload (server to client), this will include the data from the server - pub data: Vec, -} - -impl TransferDataResponse { - pub(crate) fn new(block_sequence_counter: u8, data: Vec) -> Self { - Self { - block_sequence_counter, - data, - } - } -} - -// --------------------------------------------------------------------------- -// no_std TX types (borrow from caller) -// --------------------------------------------------------------------------- - +/// /// Zero-alloc TX request to transfer data. Borrows from the caller. #[derive(Clone, Copy, Debug, PartialEq)] pub struct TransferDataRequestTx<'d> { @@ -98,13 +39,6 @@ impl<'d> TransferDataRequestTx<'d> { data, } } - - /// Convert to the owned (allocating) [`TransferDataRequest`]. - #[cfg(feature = "alloc")] - #[must_use] - pub fn to_owned(&self) -> TransferDataRequest { - TransferDataRequest::new(self.block_sequence_counter, self.data.to_vec()) - } } impl Encode for TransferDataRequestTx<'_> { @@ -154,13 +88,6 @@ impl<'d> TransferDataResponseTx<'d> { data, } } - - /// Convert to the owned (allocating) [`TransferDataResponse`]. - #[cfg(feature = "alloc")] - #[must_use] - pub fn to_owned(&self) -> TransferDataResponse { - TransferDataResponse::new(self.block_sequence_counter, self.data.to_vec()) - } } impl Encode for TransferDataResponseTx<'_> { From 90bfb4064f434187173b4f69ed93394a162c53f2 Mon Sep 17 00:00:00 2001 From: Zach Heylmun Date: Mon, 1 Jun 2026 14:23:19 -0400 Subject: [PATCH 14/58] fix serde Deserialize on borrowed file-transfer enums and a dead import Two CI failures (both gated by RUSTFLAGS=-Dwarnings): - Deriving serde::Deserialize on RequestFileTransferRequestTx/ ResponseTx failed because their variants hold lifetime-bearing types (NamePayloadTx<'a>, SentDataPayloadTx<'a>). serde only auto-borrows literal &str/&[u8], so the generated Deserialize<'de> impl lacked the 'de: 'a bound. Add cfg-gated serde(borrow) to each variant field carrying 'a. - Remove the unused `Identifier` import in the traits test module; the trait is implemented via the macro's $crate::Identifier path. --- src/services/request_file_transfer.rs | 37 +++++++++++++++++++-------- src/traits.rs | 2 +- 2 files changed, 27 insertions(+), 12 deletions(-) diff --git a/src/services/request_file_transfer.rs b/src/services/request_file_transfer.rs index c25207a..0229514 100644 --- a/src/services/request_file_transfer.rs +++ b/src/services/request_file_transfer.rs @@ -155,24 +155,39 @@ pub struct NamePayloadTx<'a> { #[non_exhaustive] pub enum RequestFileTransferRequestTx<'a> { /// Add a file to the server - AddFile(NamePayloadTx<'a>, DataFormatIdentifier, SizePayload), + AddFile( + #[cfg_attr(feature = "serde", serde(borrow))] NamePayloadTx<'a>, + DataFormatIdentifier, + SizePayload, + ), /// Delete the specified file from the server - DeleteFile(NamePayloadTx<'a>), + DeleteFile(#[cfg_attr(feature = "serde", serde(borrow))] NamePayloadTx<'a>), /// Replace the specified file on the server, if it does not exist, add it - ReplaceFile(NamePayloadTx<'a>, DataFormatIdentifier, SizePayload), + ReplaceFile( + #[cfg_attr(feature = "serde", serde(borrow))] NamePayloadTx<'a>, + DataFormatIdentifier, + SizePayload, + ), /// Read the specified file from the server (upload) - ReadFile(NamePayloadTx<'a>, DataFormatIdentifier), + ReadFile( + #[cfg_attr(feature = "serde", serde(borrow))] NamePayloadTx<'a>, + DataFormatIdentifier, + ), /// Read the directory from the server /// Implies that the request does not include a `fileName` - ReadDir(NamePayloadTx<'a>), + ReadDir(#[cfg_attr(feature = "serde", serde(borrow))] NamePayloadTx<'a>), /// Resume a file transfer at the returned `filePosition` indicator /// The file must already exist in the ECU's filesystem - ResumeFile(NamePayloadTx<'a>, DataFormatIdentifier, SizePayload), + ResumeFile( + #[cfg_attr(feature = "serde", serde(borrow))] NamePayloadTx<'a>, + DataFormatIdentifier, + SizePayload, + ), } ///////////////////////////////////////// - Response - /////////////////////////////////////////////////// @@ -304,7 +319,7 @@ pub enum RequestFileTransferResponseTx<'a> { /// Positive response to an [`AddFile`](FileOperationMode::AddFile) request. AddFile( FileOperationMode, - SentDataPayloadTx<'a>, + #[cfg_attr(feature = "serde", serde(borrow))] SentDataPayloadTx<'a>, DataFormatIdentifier, ), /// Positive response to a [`DeleteFile`](FileOperationMode::DeleteFile) request. @@ -312,27 +327,27 @@ pub enum RequestFileTransferResponseTx<'a> { /// Positive response to a [`ReplaceFile`](FileOperationMode::ReplaceFile) request. ReplaceFile( FileOperationMode, - SentDataPayloadTx<'a>, + #[cfg_attr(feature = "serde", serde(borrow))] SentDataPayloadTx<'a>, DataFormatIdentifier, ), /// Positive response to a [`ReadFile`](FileOperationMode::ReadFile) request, including file size. ReadFile( FileOperationMode, - SentDataPayloadTx<'a>, + #[cfg_attr(feature = "serde", serde(borrow))] SentDataPayloadTx<'a>, DataFormatIdentifier, FileSizePayload, ), /// Positive response to a [`ReadDir`](FileOperationMode::ReadDir) request, including directory size. ReadDir( FileOperationMode, - SentDataPayloadTx<'a>, + #[cfg_attr(feature = "serde", serde(borrow))] SentDataPayloadTx<'a>, DataFormatIdentifier, DirSizePayload, ), /// Positive response to a [`ResumeFile`](FileOperationMode::ResumeFile) request, including file position. ResumeFile( FileOperationMode, - SentDataPayloadTx<'a>, + #[cfg_attr(feature = "serde", serde(borrow))] SentDataPayloadTx<'a>, DataFormatIdentifier, PositionPayload, ), diff --git a/src/traits.rs b/src/traits.rs index 1efe729..d706b5c 100644 --- a/src/traits.rs +++ b/src/traits.rs @@ -138,7 +138,7 @@ pub trait DiagnosticDefinition: 'static { #[cfg(test)] mod tests { use super::*; - use crate::{Identifier, UDSIdentifier}; + use crate::UDSIdentifier; #[cfg_attr(feature = "serde", derive(serde::Deserialize, serde::Serialize))] #[derive(Clone, Copy, Debug, Eq, PartialEq)] From db5e483700dacb3e1a5913131c8b53b0b09a3ee1 Mon Sep 17 00:00:00 2001 From: Zach Heylmun Date: Mon, 1 Jun 2026 15:47:42 -0400 Subject: [PATCH 15/58] fix rustdoc unresolved intra-doc link warnings - impl_identifier!: macro lives at crate root, qualify the link with (crate::impl_identifier). - TransferDataRequest / SecurityAccessRequest: point at the actual Tx-suffixed types (TransferDataRequestTx, SecurityAccessRequestTx). - DTCSeverityRecord: link to the real iterator DtcSeverityAndStatusIter. - DTCExtDataRecord: not a Rust type (UDS-spec concept), de-link to plain backticks matching the existing usage in the same doc. cargo doc --all-features --no-deps now passes under RUSTDOCFLAGS=-Dwarnings. --- src/common/dtc_ext_data.rs | 4 ++-- src/lib.rs | 2 +- src/services/read_dtc_information.rs | 2 +- src/services/request_download.rs | 2 +- src/traits.rs | 2 +- 5 files changed, 6 insertions(+), 6 deletions(-) diff --git a/src/common/dtc_ext_data.rs b/src/common/dtc_ext_data.rs index 52f4629..a2d3e02 100644 --- a/src/common/dtc_ext_data.rs +++ b/src/common/dtc_ext_data.rs @@ -1,4 +1,4 @@ -/// The `DTCExtDataRecordNumber` is used in the request message to get a stored [`DTCExtDataRecord`] +/// The `DTCExtDataRecordNumber` is used in the request message to get a stored `DTCExtDataRecord` /// Its used to specify the type of `DTCExtDataRecord` to be reported. #[cfg_attr(feature = "serde", derive(serde::Deserialize, serde::Serialize))] #[cfg_attr(feature = "utoipa", derive(utoipa::ToSchema))] @@ -7,7 +7,7 @@ pub enum DTCExtDataRecordNumber { /// ISO/SAE reserved record numbers (`0x00`, `0xF0-0xFD`). ISOSAEReserved(u8), - /// Vehicle manufactured specific stored [`DTCExtDataRecord`]s + /// Vehicle manufactured specific stored `DTCExtDataRecord`s /// /// 0x01-0x8F VehicleManufacturer(u8), diff --git a/src/lib.rs b/src/lib.rs index 83910a4..891c37d 100644 --- a/src/lib.rs +++ b/src/lib.rs @@ -62,7 +62,7 @@ pub enum RoutineControlSubFunction { /// which indicates that the routine has already been performed, or is in progress /// /// It might be necessary to switch the server to a specific Diagnostic Session via [`DiagnosticSessionControlRequest`] before starting the routine, - /// or unlock the server using [`SecurityAccessRequest`] before starting the routine. + /// or unlock the server using [`SecurityAccessRequestTx`] before starting the routine. StartRoutine, /// The server routine shall be stopped in the server's memory sometime between the completion of the `StopRoutine` request and the completion of the 1st response message diff --git a/src/services/read_dtc_information.rs b/src/services/read_dtc_information.rs index 4fb7f07..d5055b5 100644 --- a/src/services/read_dtc_information.rs +++ b/src/services/read_dtc_information.rs @@ -387,7 +387,7 @@ pub enum ReadDTCInfoResponseRx<'a> { sub_function_id: u8, /// DTC status availability mask. status_availability_mask: DTCStatusAvailabilityMask, - /// Raw record bytes (6 bytes per record) — use [`DTCSeverityRecord`] iteration. + /// Raw record bytes (6 bytes per record) — use [`DtcSeverityAndStatusIter`] iteration. raw_records: &'a [u8], }, /// Sub-function 0x42: WWH-OBD DTC by mask with severity info. diff --git a/src/services/request_download.rs b/src/services/request_download.rs index 5fa2166..1cf3029 100644 --- a/src/services/request_download.rs +++ b/src/services/request_download.rs @@ -146,7 +146,7 @@ impl<'a> Decode<'a> for RequestDownloadRequest { #[derive(Clone, Copy, Debug, PartialEq)] pub struct RequestDownloadResponseTx<'d> { length_format_identifier: LengthFormatIdentifier, - /// Maximum number of bytes per [`TransferDataRequest`](crate::TransferDataRequest). + /// Maximum number of bytes per [`TransferDataRequestTx`](crate::TransferDataRequestTx). pub max_number_of_block_length: &'d [u8], } diff --git a/src/traits.rs b/src/traits.rs index d706b5c..78c5a98 100644 --- a/src/traits.rs +++ b/src/traits.rs @@ -51,7 +51,7 @@ pub trait DecodeIter<'a>: Sized { /// Trait for types that can be used as identifiers (ie Data Identifiers and Routine Identifiers) /// -/// Use the [`impl_identifier!`] macro to implement this trait for your types. +/// Use the [`impl_identifier!`](crate::impl_identifier) macro to implement this trait for your types. pub trait Identifier: TryFrom + Into + Clone + Copy {} /// Implement the [`Identifier`] trait for a type. From 83e4a2432f1dd9b964e201579634072548090917 Mon Sep 17 00:00:00 2001 From: Zach Heylmun Date: Mon, 1 Jun 2026 16:37:26 -0400 Subject: [PATCH 16/58] simplify Identifier encode conversion Replace the convoluted `>::into((*self).into())` with the equivalent `Into::::into(*self).to_be_bytes()`. --- src/traits.rs | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/src/traits.rs b/src/traits.rs index 78c5a98..d74c3b8 100644 --- a/src/traits.rs +++ b/src/traits.rs @@ -83,7 +83,7 @@ where fn encode(&self, writer: &mut impl embedded_io::Write) -> Result { writer - .write_all(&>::into((*self).into()).to_be_bytes()) + .write_all(&Into::::into(*self).to_be_bytes()) .map_err(Error::io)?; Ok(2) } From 40838c92a188ee2ed2e26510274a422e153017e4 Mon Sep 17 00:00:00 2001 From: Zach Heylmun Date: Mon, 1 Jun 2026 16:37:37 -0400 Subject: [PATCH 17/58] preserve error kind in From Previously every std::io::Error collapsed to ErrorKind::Other, discarding WouldBlock/TimedOut/etc. embedded_io provides From, so map through err.kind() instead. --- src/error.rs | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/src/error.rs b/src/error.rs index 20fd371..a357289 100644 --- a/src/error.rs +++ b/src/error.rs @@ -83,7 +83,7 @@ impl From for Error { #[cfg(feature = "std")] impl From for Error { - fn from(_err: std::io::Error) -> Self { - Self::IoError(embedded_io::ErrorKind::Other) + fn from(err: std::io::Error) -> Self { + Self::IoError(err.kind().into()) } } From 7a6e9991398e410b72c2cc11cd72afc40fa06553 Mon Sep 17 00:00:00 2001 From: Zach Heylmun Date: Mon, 1 Jun 2026 16:37:37 -0400 Subject: [PATCH 18/58] clamp RequestDownload memory lengths to at least one byte A memory_address or memory_size of 0 produced a 0-length nibble in the MemoryFormatIdentifier, which is invalid per ISO-14229 (lengths must be >=1) and encoded a frame that could not be decoded back. Clamp both computed lengths to a minimum of 1 and add a round-trip regression test. --- src/services/request_download.rs | 31 +++++++++++++++++++++++++++++-- 1 file changed, 29 insertions(+), 2 deletions(-) diff --git a/src/services/request_download.rs b/src/services/request_download.rs index 1cf3029..0a1da3f 100644 --- a/src/services/request_download.rs +++ b/src/services/request_download.rs @@ -53,8 +53,13 @@ impl RequestDownloadRequest { if memory_address > 0xFF_FFFF_FFFF { return Err(Error::InvalidMemoryAddress(memory_address)); } - let memory_address_length = (u64::BITS - memory_address.leading_zeros()).div_ceil(8) as u8; - let memory_size_length = (u32::BITS - memory_size.leading_zeros()).div_ceil(8) as u8; + // A length of 0 produces an invalid `MemoryFormatIdentifier` (the nibbles + // must be >=1 per ISO-14229), so clamp to at least one byte even when the + // address or size is 0. + let memory_address_length = + ((u64::BITS - memory_address.leading_zeros()).div_ceil(8) as u8).max(1); + let memory_size_length = + ((u32::BITS - memory_size.leading_zeros()).div_ceil(8) as u8).max(1); let address_and_length_format_identifier = MemoryFormatIdentifier { memory_size_length, memory_address_length, @@ -257,6 +262,28 @@ mod tests { assert_eq!(u8::from(length_format_identifier), 0xF0); } + #[test] + fn zero_address_and_size_clamp_to_one_byte() { + // A 0 address/size must still produce a valid (>=1 byte) length nibble, + // otherwise the encoded frame cannot be decoded back. + let req = RequestDownloadRequest::new(0x00.into(), 0, 0).unwrap(); + assert_eq!( + req.address_and_length_format_identifier + .memory_address_length, + 1 + ); + assert_eq!( + req.address_and_length_format_identifier.memory_size_length, + 1 + ); + + let mut buf = [0u8; 8]; + let written = Encode::encode(&req, &mut buf.as_mut_slice()).unwrap(); + let (decoded, _) = ::decode(&buf[..written]).unwrap(); + assert_eq!(decoded.memory_address, 0); + assert_eq!(decoded.memory_size, 0); + } + #[test] fn check_message_size() { let req = RequestDownloadRequest::new(0x00.into(), 0xF0_FF_FF_67, 0x0A).unwrap(); From e260af61e09078c3ec5519a9235ca509553bf79e Mon Sep 17 00:00:00 2001 From: Zach Heylmun Date: Mon, 1 Jun 2026 16:37:37 -0400 Subject: [PATCH 19/58] restore allowed_nack_codes on WriteDataByIdentifierRequest The helper and its WRITE_DID_NEGATIVE_RESPONSE_CODES constant were dropped during the refactor while every other service kept theirs, an inconsistent public-API regression. Restore both for consistency. --- src/services/write_data_by_identifier.rs | 16 +++++++++++++++- 1 file changed, 15 insertions(+), 1 deletion(-) diff --git a/src/services/write_data_by_identifier.rs b/src/services/write_data_by_identifier.rs index 35224cc..1aff4ef 100644 --- a/src/services/write_data_by_identifier.rs +++ b/src/services/write_data_by_identifier.rs @@ -1,5 +1,13 @@ //! `WriteDataByIdentifier` (0x2E) service implementation -use crate::{Encode, Error, Identifier}; +use crate::{Encode, Error, Identifier, NegativeResponseCode}; + +const WRITE_DID_NEGATIVE_RESPONSE_CODES: [NegativeResponseCode; 5] = [ + NegativeResponseCode::IncorrectMessageLengthOrInvalidFormat, + NegativeResponseCode::ConditionsNotCorrect, + NegativeResponseCode::RequestOutOfRange, + NegativeResponseCode::SecurityAccessDenied, + NegativeResponseCode::GeneralProgrammingFailure, +]; /// See ISO-14229-1:2020, Section 11.7.2.1 #[cfg_attr(feature = "serde", derive(serde::Deserialize, serde::Serialize))] @@ -16,6 +24,12 @@ impl WriteDataByIdentifierRequest { pub fn new(payload: Payload) -> Self { Self { payload } } + + /// Get the allowed [`NegativeResponseCode`] variants for this request. + #[must_use] + pub fn allowed_nack_codes() -> &'static [NegativeResponseCode] { + &WRITE_DID_NEGATIVE_RESPONSE_CODES + } } impl Encode for WriteDataByIdentifierRequest { From 697dbbeda086e204e8c75e4b02518564dd265fb4 Mon Sep 17 00:00:00 2001 From: Zach Heylmun Date: Mon, 1 Jun 2026 16:38:06 -0400 Subject: [PATCH 20/58] make DiagnosticDefinition lifetime-generic Hard-coding 'static on DiagnosticPayload/RoutinePayload prevented UdsSpec from being used with the new borrowed zero-copy Tx payloads, defeating their purpose. Parameterize the trait as DiagnosticDefinition<'a> and bind the payload associated types to 'a; the DID/RID identifier types remain 'static. --- src/lib.rs | 6 +++--- src/traits.rs | 6 +++--- 2 files changed, 6 insertions(+), 6 deletions(-) diff --git a/src/lib.rs b/src/lib.rs index 891c37d..001263a 100644 --- a/src/lib.rs +++ b/src/lib.rs @@ -44,11 +44,11 @@ pub const PENDING: u8 = 0x78; #[derive(Clone, Copy, Debug, Eq, PartialEq)] pub struct UdsSpec; -impl DiagnosticDefinition for UdsSpec { +impl<'a> DiagnosticDefinition<'a> for UdsSpec { type RID = UDSRoutineIdentifier; type DID = ProtocolIdentifier; - type RoutinePayload = ProtocolRoutinePayloadTx<'static>; - type DiagnosticPayload = ProtocolPayloadTx<'static>; + type RoutinePayload = ProtocolRoutinePayloadTx<'a>; + type DiagnosticPayload = ProtocolPayloadTx<'a>; } /// What type of routine control to perform for a [`RoutineControlRequest`]. diff --git a/src/traits.rs b/src/traits.rs index d74c3b8..11f8323 100644 --- a/src/traits.rs +++ b/src/traits.rs @@ -124,15 +124,15 @@ where /// Trait for diagnostic definitions that specifies the identifier and payload /// types used when constructing and parsing UDS requests and responses. -pub trait DiagnosticDefinition: 'static { +pub trait DiagnosticDefinition<'a> { /// UDS Data Identifier type. type DID: Identifier + Clone + core::fmt::Debug + PartialEq + 'static; /// Payload type for read/write data by identifier etc. - type DiagnosticPayload: Encode + Clone + core::fmt::Debug + PartialEq + 'static; + type DiagnosticPayload: Encode + Clone + core::fmt::Debug + PartialEq + 'a; /// UDS Routine Identifier type. type RID: RoutineIdentifier + Clone + core::fmt::Debug + PartialEq + 'static; /// Payload type for routine control requests/responses. - type RoutinePayload: Encode + Clone + core::fmt::Debug + PartialEq + 'static; + type RoutinePayload: Encode + Clone + core::fmt::Debug + PartialEq + 'a; } #[cfg(test)] From 8cfb5de92eb410786e2a1499439cb0f616c7256d Mon Sep 17 00:00:00 2001 From: Zach Heylmun Date: Mon, 1 Jun 2026 16:38:28 -0400 Subject: [PATCH 21/58] forward is_positive_response_suppressed in Request Request implements Encode but used the default impl, always reporting false even when the wrapped request had SPRMIB set. Forward to the inner request for the five suppressible variants (ControlDTCSettings, DiagnosticSessionControl, EcuReset, SecurityAccess, TesterPresent). --- src/request.rs | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/src/request.rs b/src/request.rs index 5d9f12a..b284486 100644 --- a/src/request.rs +++ b/src/request.rs @@ -178,6 +178,17 @@ impl Encode for Request<'_> { }; Ok(1 + payload) } + + fn is_positive_response_suppressed(&self) -> bool { + match self { + Self::ControlDTCSettings(req) => req.is_positive_response_suppressed(), + Self::DiagnosticSessionControl(req) => req.is_positive_response_suppressed(), + Self::EcuReset(req) => req.is_positive_response_suppressed(), + Self::SecurityAccess(req) => req.is_positive_response_suppressed(), + Self::TesterPresent(req) => req.is_positive_response_suppressed(), + _ => false, + } + } } impl Request<'_> { From 4154adcbea3131633a5b34110e3c2ebaa8bde24c Mon Sep 17 00:00:00 2001 From: Zach Heylmun Date: Mon, 1 Jun 2026 16:38:39 -0400 Subject: [PATCH 22/58] reject trailing bytes when decoding Request/Response Request::decode and Response::decode discarded the remainder from inner Decode calls and unconditionally returned an empty remainder, silently accepting trailing bytes after a well-formed frame. Add Decode::decode_exact, which errors on any unconsumed bytes, and use it for the fixed-size sub-decoders so a single buffer is treated as exactly one frame. --- src/request.rs | 80 ++++++++++++++++++++++++++++++++----------------- src/response.rs | 49 ++++++++++++------------------ src/traits.rs | 18 +++++++++++ 3 files changed, 89 insertions(+), 58 deletions(-) diff --git a/src/request.rs b/src/request.rs index b284486..495343e 100644 --- a/src/request.rs +++ b/src/request.rs @@ -65,35 +65,30 @@ impl<'a> Decode<'a> for Request<'a> { let request = match service { UdsServiceType::ClearDiagnosticInfo => { - let (req, _) = ::decode(payload)?; - Self::ClearDiagnosticInfo(req) - } - UdsServiceType::CommunicationControl => { - let (req, _) = ::decode(payload)?; - Self::CommunicationControl(req) - } - UdsServiceType::ControlDTCSettings => { - let (req, _) = ::decode(payload)?; - Self::ControlDTCSettings(req) - } - UdsServiceType::DiagnosticSessionControl => { - let (req, _) = ::decode(payload)?; - Self::DiagnosticSessionControl(req) + Self::ClearDiagnosticInfo(::decode_exact( + payload, + )?) } + UdsServiceType::CommunicationControl => Self::CommunicationControl( + ::decode_exact(payload)?, + ), + UdsServiceType::ControlDTCSettings => Self::ControlDTCSettings( + ::decode_exact(payload)?, + ), + UdsServiceType::DiagnosticSessionControl => Self::DiagnosticSessionControl( + ::decode_exact(payload)?, + ), UdsServiceType::EcuReset => { - let (req, _) = ::decode(payload)?; - Self::EcuReset(req) + Self::EcuReset(::decode_exact(payload)?) } UdsServiceType::ReadDataByIdentifier => Self::ReadDataByIdentifier(payload), UdsServiceType::ReadDTCInfo => Self::ReadDTCInfo(payload), UdsServiceType::RequestDownload => { - let (req, _) = ::decode(payload)?; - Self::RequestDownload(req) - } - UdsServiceType::RequestFileTransfer => { - let (req, _) = ::decode(payload)?; - Self::RequestFileTransfer(req) + Self::RequestDownload(::decode_exact(payload)?) } + UdsServiceType::RequestFileTransfer => Self::RequestFileTransfer( + ::decode_exact(payload)?, + ), UdsServiceType::RequestTransferExit => Self::RequestTransferExit, UdsServiceType::RoutineControl => { if payload.is_empty() { @@ -105,16 +100,13 @@ impl<'a> Decode<'a> for Request<'a> { } } UdsServiceType::SecurityAccess => { - let (req, _) = ::decode(payload)?; - Self::SecurityAccess(req) + Self::SecurityAccess(::decode_exact(payload)?) } UdsServiceType::TesterPresent => { - let (req, _) = ::decode(payload)?; - Self::TesterPresent(req) + Self::TesterPresent(::decode_exact(payload)?) } UdsServiceType::TransferData => { - let (req, _) = ::decode(payload)?; - Self::TransferData(req) + Self::TransferData(::decode_exact(payload)?) } UdsServiceType::WriteDataByIdentifier => Self::WriteDataByIdentifier(payload), _ => return Err(Error::ServiceNotImplemented(service)), @@ -214,3 +206,35 @@ impl Request<'_> { } } } + +#[cfg(test)] +mod tests { + use super::*; + use crate::{ResetType, service::UdsServiceType}; + + #[test] + fn decode_rejects_trailing_bytes() { + // ECU reset is a fixed 1-byte payload; an extra trailing byte is a + // malformed frame and must be rejected rather than silently dropped. + let mut frame = [0u8; 3]; + frame[0] = UdsServiceType::EcuReset.request_service_to_byte(); + frame[1] = u8::from(ResetType::HardReset); + frame[2] = 0xAA; // trailing junk + let result = Request::decode(&frame); + assert!(matches!( + result, + Err(Error::IncorrectMessageLengthOrInvalidFormat) + )); + } + + #[test] + fn suppression_forwards_to_inner_request() { + let suppressed = + Request::EcuReset(EcuResetRequest::new(true, ResetType::HardReset)); + assert!(suppressed.is_positive_response_suppressed()); + + let not_suppressed = + Request::EcuReset(EcuResetRequest::new(false, ResetType::HardReset)); + assert!(!not_suppressed.is_positive_response_suppressed()); + } +} diff --git a/src/response.rs b/src/response.rs index 13c09c1..798694e 100644 --- a/src/response.rs +++ b/src/response.rs @@ -61,39 +61,31 @@ impl<'a> Decode<'a> for Response<'a> { let response = match service { UdsServiceType::ClearDiagnosticInfo => Self::ClearDiagnosticInfo, - UdsServiceType::CommunicationControl => { - let (resp, _) = ::decode(payload)?; - Self::CommunicationControl(resp) - } - UdsServiceType::ControlDTCSettings => { - let (resp, _) = ::decode(payload)?; - Self::ControlDTCSettings(resp) - } - UdsServiceType::DiagnosticSessionControl => { - let (resp, _) = ::decode(payload)?; - Self::DiagnosticSessionControl(resp) - } + UdsServiceType::CommunicationControl => Self::CommunicationControl( + ::decode_exact(payload)?, + ), + UdsServiceType::ControlDTCSettings => Self::ControlDTCSettings( + ::decode_exact(payload)?, + ), + UdsServiceType::DiagnosticSessionControl => Self::DiagnosticSessionControl( + ::decode_exact(payload)?, + ), UdsServiceType::EcuReset => { - let (resp, _) = ::decode(payload)?; - Self::EcuReset(resp) + Self::EcuReset(::decode_exact(payload)?) } UdsServiceType::NegativeResponse => { - let (resp, _) = ::decode(payload)?; - Self::NegativeResponse(resp) + Self::NegativeResponse(::decode_exact(payload)?) } UdsServiceType::ReadDataByIdentifier => Self::ReadDataByIdentifier(payload), UdsServiceType::ReadDTCInfo => { - let (resp, _) = ::decode(payload)?; - Self::ReadDTCInfo(resp) + Self::ReadDTCInfo(::decode_exact(payload)?) } UdsServiceType::RequestDownload => { - let (resp, _) = ::decode(payload)?; - Self::RequestDownload(resp) - } - UdsServiceType::RequestFileTransfer => { - let (resp, _) = ::decode(payload)?; - Self::RequestFileTransfer(resp) + Self::RequestDownload(::decode_exact(payload)?) } + UdsServiceType::RequestFileTransfer => Self::RequestFileTransfer( + ::decode_exact(payload)?, + ), UdsServiceType::RequestTransferExit => Self::RequestTransferExit, UdsServiceType::RoutineControl => { if payload.is_empty() { @@ -105,16 +97,13 @@ impl<'a> Decode<'a> for Response<'a> { } } UdsServiceType::SecurityAccess => { - let (resp, _) = ::decode(payload)?; - Self::SecurityAccess(resp) + Self::SecurityAccess(::decode_exact(payload)?) } UdsServiceType::TesterPresent => { - let (resp, _) = ::decode(payload)?; - Self::TesterPresent(resp) + Self::TesterPresent(::decode_exact(payload)?) } UdsServiceType::TransferData => { - let (resp, _) = ::decode(payload)?; - Self::TransferData(resp) + Self::TransferData(::decode_exact(payload)?) } UdsServiceType::WriteDataByIdentifier => Self::WriteDataByIdentifier(payload), _ => return Err(Error::ServiceNotImplemented(service)), diff --git a/src/traits.rs b/src/traits.rs index 11f8323..0a668a7 100644 --- a/src/traits.rs +++ b/src/traits.rs @@ -32,6 +32,24 @@ pub trait Decode<'a>: Sized { /// # Errors /// Returns an error if `buf` is too short or contains invalid data. fn decode(buf: &'a [u8]) -> Result<(Self, &'a [u8]), Error>; + + /// Decode from `buf`, requiring the entire buffer to be consumed. + /// + /// Use this when `buf` is expected to contain exactly one value and any + /// trailing bytes indicate a malformed frame. + /// + /// # Errors + /// Returns [`Error::IncorrectMessageLengthOrInvalidFormat`] if any bytes + /// remain after decoding, or whatever error [`decode`](Self::decode) + /// produces. + fn decode_exact(buf: &'a [u8]) -> Result { + let (value, rest) = Self::decode(buf)?; + if rest.is_empty() { + Ok(value) + } else { + Err(Error::IncorrectMessageLengthOrInvalidFormat) + } + } } /// RX-side trait: streaming / iterable zero-copy decode. From be30750ba545f4b30d5602efa0a1859fec42e686 Mon Sep 17 00:00:00 2001 From: Zach Heylmun Date: Mon, 1 Jun 2026 18:52:58 -0400 Subject: [PATCH 23/58] add no_std API alignment design spec Architectural review before landing the no_std refactor: pure sync codec scope, remove orphaned DiagnosticDefinition + identifier machinery, de-genericize builders, unify Tx/Rx naming and the raw-passthrough escape hatch, and codec-trait hygiene. --- .../2026-06-01-no-std-api-alignment-design.md | 225 ++++++++++++++++++ 1 file changed, 225 insertions(+) create mode 100644 docs/superpowers/specs/2026-06-01-no-std-api-alignment-design.md diff --git a/docs/superpowers/specs/2026-06-01-no-std-api-alignment-design.md b/docs/superpowers/specs/2026-06-01-no-std-api-alignment-design.md new file mode 100644 index 0000000..cf07a31 --- /dev/null +++ b/docs/superpowers/specs/2026-06-01-no-std-api-alignment-design.md @@ -0,0 +1,225 @@ +# UDS Protocol — no_std API Alignment Design + +**Date:** 2026-06-01 +**Branch:** `feature/no_std` +**Status:** Approved scope, pending implementation plan + +## Purpose + +Before landing the `no_std` rearchitecture, align the public API with the crate's +revised scope so that breaking changes happen once, not in a series of post-publish +follow-ups. The scope changed from "desktop diagnostic tooling" to **a pure, +synchronous, runtime-agnostic UDS codec usable on `no_std` + `no_alloc` targets.** + +## Confirmed scope (decisions) + +- **Pure codec.** The crate encodes/decodes UDS messages only. Transport (DoIP, + UDSonIP, sync or async) lives in downstream crates that depend on this one. +- **Fully synchronous.** No async anywhere. `Encode` writes into any + `embedded_io::Write`; `Decode` borrows from a `&[u8]`. Callers — sync or async — + own the I/O loop. The crate never owns a runtime, a socket, or a buffer it + allocates. +- **`no_std` + `no_alloc` baseline.** `alloc` and `std` are strictly additive + features. This is already true structurally and must stay true. + +## What is NOT changing + +- The `Encode` (stream) / `Decode` (borrow-from-slice) split — this is the correct + shape for `no_alloc` and is kept. +- The concrete fixed-size service types (`EcuResetRequest`, `TesterPresentRequest`, + the `*Response` fixed types, `NegativeResponse`, etc.). +- The `UDSIdentifier` / `UDSRoutineIdentifier` enums (kept; see Decision 2). +- The `ReadDTCInfoResponseRx` "typed enum holding raw bytes + lazy iterators" + pattern — this is the model the rest of the RX surface should resemble. +- The existing `no_std` / `alloc` / bare-metal CI matrix. + +--- + +## Decisions + +### Decision 1 — Remove the orphaned generic-typing abstraction + +`DiagnosticDefinition` is exported with a worked example (`UdsSpec`) but **nothing +consumes it** — the only references are its own definition and the `UdsSpec` impl. +The decode path already produces raw `&[u8]` for the identifier-driven services. The +original highly-genericized design was found to be harder to understand than simply +carrying payloads, and the abstraction did not survive the `no_std` pass. + +**Action:** Delete `DiagnosticDefinition` and `UdsSpec`. Commit fully to the +payload-carrying model: dispatch enums are non-generic and hand back raw payload +bytes; callers interpret those bytes themselves. + +### Decision 2 — Strip all identifier machinery + +With `DiagnosticDefinition` gone, the remaining generics exist only to support +pluggable, user-defined identifier types — which the payload-carrying model no longer +needs. + +**Remove:** +- The `Identifier` and `RoutineIdentifier` traits. +- The `impl_identifier!` macro. +- The blanket `Encode` / `Decode` / `DecodeIter` impls for `T: Identifier` + (`src/traits.rs`). +- `ProtocolIdentifier`, `ProtocolPayloadTx`, `ProtocolRoutinePayloadTx` + (`src/protocol_definitions.rs` — the module is deleted). + +**Keep:** +- `UDSIdentifier` and `UDSRoutineIdentifier` enums, with their existing + `TryFrom` / `From for u16` conversions. +- Because these enums currently obtain `Encode`/`Decode` via the blanket impl, give + each a **direct, concrete** `Encode` + `Decode` impl (2-byte big-endian) so users + can still serialize/parse a known identifier when they want to. This is the only + identifier-level codec that survives. + +**Net effect:** the crate exposes raw payload bytes plus the canonical +`UDSIdentifier` / `UDSRoutineIdentifier` enums. No generic identifier plumbing. + +### Decision 3 — De-genericize the service builders to match RX + +The TX builders for the identifier services are the last place generics survive. +De-genericize them so TX mirrors the raw-bytes RX side. + +| Service | Current (TX) | New (TX) carries | +|---|---|---| +| ReadDataByIdentifier | `ReadDataByIdentifierRequestTx<'d, DID>` | `&'d [u16]` DID list (BE-encoded on write) | +| WriteDataByIdentifier | `WriteDataByIdentifierRequest` | `&'d [u8]` raw (DID + data) | +| WriteDataByIdentifier (resp) | `WriteDataByIdentifierResponse` | `u16` echoed identifier (fixed, 2 bytes) | +| RoutineControl (req) | `RoutineControlRequest` | `sub_function` + `&'d [u8]` raw (RID + data) | +| RoutineControl (resp) | `RoutineControlResponse` | `routine_control_type` + `&'d [u8]` raw status record | + +Rationale for `&[u16]` on the Read-DID request: it is a list of identifiers, and a +`u16` slice avoids an endianness footgun while staying alloc-free and generic-free. +All other payloads are opaque bytes and carry `&[u8]`, exactly matching what the RX +enum variants already hold. + +### Decision 4 — Apply the Tx/Rx naming convention strictly + +**Rule:** fixed-size bidirectional types take **no suffix**; zero-copy borrowed TX +types take **`...Tx`**; zero-copy borrowed RX types take **`...Rx`**. + +Renames required to make the existing (correct) intent consistent: + +| Current name | New name | Reason | +|---|---|---| +| `WriteDataByIdentifierRequest` | `WriteDataByIdentifierRequestTx` | now carries borrowed bytes | +| `RoutineControlRequest` | `RoutineControlRequestTx` | now carries borrowed bytes | +| `RoutineControlResponse` | `RoutineControlResponseTx` | now carries borrowed bytes | + +Types already conforming and unchanged: `ReadDataByIdentifierRequestTx`, +`TransferDataRequestTx`, `SecurityAccessRequestTx`, `RequestFileTransferRequestTx`, +`RequestDownloadResponseTx`, `SecurityAccessResponseTx`, `TransferDataResponseTx`, +`RequestFileTransferResponseTx`, `ReadDTCInfoResponseRx`, and all fixed-size +no-suffix types. `WriteDataByIdentifierResponse` stays unsuffixed (fixed `u16`). + +### Decision 5 — Unify the raw passthrough / unknown-service escape hatch + +Today the escape hatch is asymmetric: `Response` has both a raw `UdsResponse<'a>` +view and raw-slice variants, while unmodeled services on the `Request` side hard-error +with `ServiceNotImplemented`. + +**Action:** Add symmetric `Other { service: UdsServiceType, data: &'a [u8] }` variants +to **both** `Request<'a>` and `Response<'a>`. A frame for a known-but-unmodeled service +decodes into `Other` rather than erroring, so downstream transport code can pass it +through. Remove the standalone `UdsResponse<'a>` type — `Response::Other` subsumes its +"don't parse, just hand me service + bytes" role. `ServiceNotImplemented` is retained +in `Error` only for genuinely unrecognized service bytes (if any remain) and may be +removed if `Other` covers all cases — to be settled in the implementation plan. + +### Decision 6 — Move `is_positive_response_suppressed` off `Encode` + +This is UDS protocol semantics (SPRMIB) bolted onto a serialization trait; it is +meaningless for most `Encode` impls. Remove it from the `Encode` trait. Expose it as +an **inherent method** on the request types that actually carry a suppress bit +(those already wrapping `SuppressablePositiveResponse`) and on `Request<'a>`, which +forwards to its inner variant. `Encode` becomes a clean, general codec trait. + +### Decision 7 — Enforce the `encode` / `encoded_size` invariant + +Many `encode` impls return `self.encoded_size()` after writing, with no guard against +the two diverging. A caller pre-sizing a buffer from `encoded_size()` would silently +overflow/underfill if they drift. + +**Action:** Document the invariant on `Encode::encoded_size` ("must equal the byte +count `encode` writes"). Add a small generic test helper — +`assert_encode_size_agrees(value: &T)` — that encodes into a counting +writer and asserts the returned length equals `encoded_size()`, and apply it across +every service's unit tests. + +### Decision 8 — Document the `Decode` remainder contract + +`Decode::decode` returns `(value, remaining)` for composition, but every top-level +frame decoder consumes the whole buffer and returns `&[]`. Document on the trait that +frame-level decoders are whole-buffer (use `decode_exact` semantics) and the remainder +is meaningful only for leaf/sequence decoding. No code change beyond doc comments. + +### Decision 9 — Document the integration model (scope alignment) + +The README is a stub. Add an **Integration** section stating the contract explicitly: + +> This crate is a synchronous, allocation-free codec. To use it over any transport +> (DoIP, UDSonIP, ISO-TP, …), decode inbound frames from the received `&[u8]` and +> encode outbound frames into any `embedded_io::Write` or a caller-owned buffer sized +> via `encoded_size()`. The crate owns no sockets, buffers, or async runtime; drive +> I/O from your own sync or async layer. + +Include one short encode + one short decode snippet. This prevents downstream authors +from re-introducing async coupling at the codec layer. + +### Decision 10 — State the service-coverage boundary + +`UdsServiceType` enumerates ~10 services the dispatch enums do not model +(`Authentication`, `ReadMemoryByAddress`, `RequestUpload`, `ResponseOnEvent`, etc.). +With Decision 5, frames for these decode into `Other` rather than erroring. Document, +in the crate root, the explicit list of fully-modeled services vs. those reached only +through `Other`, so coverage is a stated decision rather than an accident. + +--- + +## Components touched + +- `src/traits.rs` — remove `Identifier`/`RoutineIdentifier`/`impl_identifier!` and + the three blanket impls; remove `is_positive_response_suppressed` from `Encode`; + expand `Decode` doc comments; remove `DiagnosticDefinition`. +- `src/protocol_definitions.rs` — **deleted** (module + `pub use` removed from `lib.rs`). +- `src/lib.rs` — drop `UdsSpec`, `DiagnosticDefinition`, and `protocol_definitions` + re-exports; update exports for renamed types. +- `src/common/diagnostic_identifier.rs` — replace `impl_identifier!` usage with direct + `Encode`/`Decode` impls for `UDSIdentifier` / `UDSRoutineIdentifier`. +- `src/services/read_data_by_identifier.rs` — `ReadDataByIdentifierRequestTx<'d>` over + `&'d [u16]`. +- `src/services/write_data_by_identifier.rs` — `WriteDataByIdentifierRequestTx<'d>` + over `&'d [u8]`; `WriteDataByIdentifierResponse { identifier: u16 }`. +- `src/services/routine_control.rs` — `RoutineControlRequestTx<'d>` / + `RoutineControlResponseTx<'d>` over `&'d [u8]`. +- `src/request.rs` / `src/response.rs` — add `Other { service, data }`; remove + `UdsResponse`; move suppression to inherent method; update construction for renamed + builders. +- `README.md` — add Integration section + snippets. +- Service test modules — apply `assert_encode_size_agrees`. + +## Testing + +- Preserve all existing round-trip tests; update them for renamed types and the new + builder signatures. +- Add the `assert_encode_size_agrees` harness and apply per service. +- Add decode tests that exercise `Request::Other` / `Response::Other` for a + known-but-unmodeled service byte. +- Verify the full matrix still builds and passes: default (`std`), + `--no-default-features --features alloc`, `--no-default-features`, and + `thumbv6m-none-eabi`. Clippy clean on all host combos. + +## Out of scope (explicitly deferred) + +- Implementing additional UDS services (`Authentication`, `ReadMemoryByAddress`, + `RequestUpload`, etc.). They remain reachable via `Other`. +- Any transport, session, or async layer — belongs in downstream crates. +- An `embedded-io-adapters` std-bridge convenience (can be a later additive feature). + +## Risks + +- **Broad rename churn.** Mitigated by no external consumers (no `examples/`, + `tests/`, or dependent crates in-tree) and a green CI matrix to catch breakage. +- **`Other` vs `ServiceNotImplemented` overlap.** The implementation plan must settle + whether `ServiceNotImplemented` is fully removed or retained for truly unknown bytes. +- **`&[u16]` vs `&[u8]` for Read-DID.** If callers more naturally hold raw bytes than a + `u16` slice, revisit during implementation; the rest of the design is unaffected. From d3652e7f9426f018223b959ce4b6189b3cd67eeb Mon Sep 17 00:00:00 2001 From: Zach Heylmun Date: Mon, 1 Jun 2026 18:59:48 -0400 Subject: [PATCH 24/58] elevate C-developer simplicity to a first-class principle in spec Audience is competent C developers new to Rust; bake simplicity in as an acceptance criterion, resolve Read-DID to &[u16] for clarity, and require docs to teach the borrow model in C-familiar terms. --- .../2026-06-01-no-std-api-alignment-design.md | 27 +++++++++++++++---- 1 file changed, 22 insertions(+), 5 deletions(-) diff --git a/docs/superpowers/specs/2026-06-01-no-std-api-alignment-design.md b/docs/superpowers/specs/2026-06-01-no-std-api-alignment-design.md index cf07a31..5cabaa6 100644 --- a/docs/superpowers/specs/2026-06-01-no-std-api-alignment-design.md +++ b/docs/superpowers/specs/2026-06-01-no-std-api-alignment-design.md @@ -22,6 +22,17 @@ synchronous, runtime-agnostic UDS codec usable on `no_std` + `no_alloc` targets. - **`no_std` + `no_alloc` baseline.** `alloc` and `std` are strictly additive features. This is already true structurally and must stay true. +## Guiding principle — simplicity for C developers new to Rust + +The growing user base is competent C developers who are new to Rust. **Simplicity is +a first-class acceptance criterion, not a nice-to-have:** prefer concrete types over +generics, obvious over clever, fewer types over more. This directly motivates +Decisions 1–3 (generics and trait bounds are the steepest part of Rust's learning +curve) and Decision 5 (fewer types). The one Rust concept that cannot be designed +away on a `no_alloc` target is **borrowing** — decoded values point into the caller's +buffer — so the documentation must teach that model explicitly in C-familiar terms +(see Decision 9). + ## What is NOT changing - The `Encode` (stream) / `Decode` (borrow-from-slice) split — this is the correct @@ -88,9 +99,11 @@ De-genericize them so TX mirrors the raw-bytes RX side. | RoutineControl (resp) | `RoutineControlResponse` | `routine_control_type` + `&'d [u8]` raw status record | Rationale for `&[u16]` on the Read-DID request: it is a list of identifiers, and a -`u16` slice avoids an endianness footgun while staying alloc-free and generic-free. -All other payloads are opaque bytes and carry `&[u8]`, exactly matching what the RX -enum variants already hold. +`u16` slice avoids an endianness footgun while staying alloc-free and generic-free. A +DID is conceptually a 16-bit number, so `&[u16]` reads more clearly to a C developer +than a byte-pair-encoded `&[u8]` would. All other payloads are opaque bytes and carry +`&[u8]`, exactly matching what the RX enum variants already hold. **Resolved:** keep +`&[u16]` for Read-DID (was previously an open risk). ### Decision 4 — Apply the Tx/Rx naming convention strictly @@ -165,6 +178,12 @@ The README is a stub. Add an **Integration** section stating the contract explic Include one short encode + one short decode snippet. This prevents downstream authors from re-introducing async coupling at the codec layer. +Because the audience is C developers new to Rust, the decode snippet must make the +**borrow** explicit: the decoded value points into the receive buffer you passed in +(like a `struct` overlaid on a `char buf[]`), and is valid only while that buffer +lives — copy out any fields you need to keep. This is the single Rust-specific concept +the docs must land clearly. + ### Decision 10 — State the service-coverage boundary `UdsServiceType` enumerates ~10 services the dispatch enums do not model @@ -221,5 +240,3 @@ through `Other`, so coverage is a stated decision rather than an accident. `tests/`, or dependent crates in-tree) and a green CI matrix to catch breakage. - **`Other` vs `ServiceNotImplemented` overlap.** The implementation plan must settle whether `ServiceNotImplemented` is fully removed or retained for truly unknown bytes. -- **`&[u16]` vs `&[u8]` for Read-DID.** If callers more naturally hold raw bytes than a - `u16` slice, revisit during implementation; the rest of the design is unaffected. From 2dfeb31c0d522c5491f0cb3200ef3fb5adc68b4b Mon Sep 17 00:00:00 2001 From: Zach Heylmun Date: Mon, 1 Jun 2026 19:18:56 -0400 Subject: [PATCH 25/58] add no_std API alignment implementation plan 14 task-by-task steps implementing the approved design spec: remove DiagnosticDefinition + identifier machinery, de-genericize builders, unify Tx/Rx naming and the Other escape hatch, codec-trait hygiene, and full feature-matrix verification. --- .../plans/2026-06-01-no-std-api-alignment.md | 1166 +++++++++++++++++ 1 file changed, 1166 insertions(+) create mode 100644 docs/superpowers/plans/2026-06-01-no-std-api-alignment.md diff --git a/docs/superpowers/plans/2026-06-01-no-std-api-alignment.md b/docs/superpowers/plans/2026-06-01-no-std-api-alignment.md new file mode 100644 index 0000000..2323cc6 --- /dev/null +++ b/docs/superpowers/plans/2026-06-01-no-std-api-alignment.md @@ -0,0 +1,1166 @@ +# no_std API Alignment Implementation Plan + +> **For agentic workers:** REQUIRED SUB-SKILL: Use superpowers:subagent-driven-development (recommended) or superpowers:executing-plans to implement this plan task-by-task. Steps use checkbox (`- [ ]`) syntax for tracking. + +**Goal:** Align the `uds_protocol` public API with its revised scope — a pure, synchronous, `no_std`/`no_alloc` UDS codec — before publishing, so breaking changes happen once. + +**Architecture:** Remove the orphaned `DiagnosticDefinition` abstraction and all generic identifier machinery in favor of concrete types and raw payload byte slices. Make TX builders mirror the raw-bytes RX side, apply the Tx/Rx naming convention strictly, unify the unknown-service escape hatch into symmetric `Other` variants, and clean up the codec traits. Simplicity for C developers new to Rust is a first-class acceptance criterion. + +**Tech Stack:** Rust 2024, `no_std`, `embedded-io` (sync `Write`), `byteorder-embedded-io`, `thiserror` (no_std). No async, no allocation in the baseline. + +**Spec:** `docs/superpowers/specs/2026-06-01-no-std-api-alignment-design.md` + +**Execute tasks in order.** Each task ends green (builds + tests pass) and is committed independently. + +--- + +## File Structure + +Files created: +- `src/test_util.rs` — `#[cfg(test)]` helper asserting `encode` length equals `encoded_size()`. + +Files deleted: +- `src/protocol_definitions.rs` — `ProtocolIdentifier` / `ProtocolPayloadTx` / `ProtocolRoutinePayloadTx` are removed. + +Files modified (primary responsibility): +- `src/traits.rs` — remove `Identifier`/`RoutineIdentifier`/`impl_identifier!`, blanket impls, `DiagnosticDefinition`, and `Encode::is_positive_response_suppressed`; expand `Decode` docs. +- `src/lib.rs` — register `test_util`; drop removed re-exports + `UdsSpec`; add service-coverage docs. +- `src/common/diagnostic_identifier.rs` — direct `Encode`/`Decode` for `UDSIdentifier`/`UDSRoutineIdentifier`. +- `src/services/read_data_by_identifier.rs` — `ReadDataByIdentifierRequestTx<'d>` over `&'d [u16]`. +- `src/services/write_data_by_identifier.rs` — `WriteDataByIdentifierRequestTx<'d>` + `WriteDataByIdentifierResponse { identifier: u16 }`. +- `src/services/routine_control.rs` — `RoutineControlRequestTx<'d>` / `RoutineControlResponseTx<'d>`. +- `src/services/control_dtc_settings.rs` — inherent `suppress_positive_response()`. +- `src/request.rs` / `src/response.rs` — `Other { service, data }`; remove `UdsResponse`; inherent suppression. +- `src/error.rs` — remove `ServiceNotImplemented`. +- `README.md` — integration + borrow-model docs. + +--- + +## Task 1: Add the `encode`/`encoded_size` agreement test helper + +Created first so every later task can assert the invariant directly. + +**Files:** +- Create: `src/test_util.rs` +- Modify: `src/lib.rs` + +- [ ] **Step 1: Create the helper module** + +Create `src/test_util.rs`: + +```rust +//! Test-only helpers shared across the crate. + +use crate::Encode; + +/// Assert that an [`Encode`] value writes exactly `encoded_size()` bytes. +/// +/// Guards against the two methods drifting, which would corrupt callers that pre-size +/// a buffer from `encoded_size()`. +pub(crate) fn assert_encode_size_agrees(value: &T) { + let mut buf = [0u8; 512]; + let mut writer = buf.as_mut_slice(); + let written = value.encode(&mut writer).unwrap(); + assert_eq!( + written, + value.encoded_size(), + "encode wrote {written} bytes but encoded_size() reported {}", + value.encoded_size() + ); +} +``` + +- [ ] **Step 2: Register the module in `src/lib.rs`** + +After the `mod error;` line (near the other `mod` declarations), add: + +```rust +#[cfg(test)] +mod test_util; +``` + +- [ ] **Step 3: Build and test** + +Run: `cargo build && cargo test` +Expected: PASS — the helper is `#[cfg(test)]` and unused so far (a dead-code warning is acceptable until Task 2 uses it; if `#![warn]` escalates it, this resolves once Task 2 lands). + +- [ ] **Step 4: Commit** + +```bash +git add src/test_util.rs src/lib.rs +git commit -m "$(printf 'add encode/encoded_size agreement test helper\n\nCo-Authored-By: Claude Opus 4.8 ')" +``` + +--- + +## Task 2: De-genericize `ReadDataByIdentifierRequestTx` to `&[u16]` + +**Files:** +- Modify: `src/services/read_data_by_identifier.rs` + +- [ ] **Step 1: Replace the file with a concrete `&[u16]` version** + +Replace the entire contents of `src/services/read_data_by_identifier.rs` with: + +```rust +//! `ReadDataByIdentifier` (0x22) service implementation +use crate::{Encode, Error, NegativeResponseCode}; + +const READ_DID_NEGATIVE_RESPONSE_CODES: [NegativeResponseCode; 5] = [ + NegativeResponseCode::IncorrectMessageLengthOrInvalidFormat, + NegativeResponseCode::ResponseTooLong, + NegativeResponseCode::ConditionsNotCorrect, + NegativeResponseCode::RequestOutOfRange, + NegativeResponseCode::SecurityAccessDenied, +]; + +/// Zero-alloc TX request to read data by identifier. Borrows the DID list from the caller. +/// +/// A Data Identifier is a 16-bit value, so the list is held as `&[u16]`; each DID is +/// written big-endian on the wire. +/// +/// See ISO-14229-1:2020, Table 11.2.1 for format information +#[derive(Clone, Copy, Debug, Eq, PartialEq)] +pub struct ReadDataByIdentifierRequestTx<'d> { + /// The list of Data Identifiers to read. + pub dids: &'d [u16], +} + +impl<'d> ReadDataByIdentifierRequestTx<'d> { + /// Create a new request from a slice of data identifiers. + #[must_use] + pub const fn new(dids: &'d [u16]) -> Self { + Self { dids } + } + + /// Get the allowed Nack codes for this request + #[must_use] + pub fn allowed_nack_codes() -> &'static [NegativeResponseCode] { + &READ_DID_NEGATIVE_RESPONSE_CODES + } +} + +impl Encode for ReadDataByIdentifierRequestTx<'_> { + fn encoded_size(&self) -> usize { + self.dids.len() * 2 + } + + fn encode(&self, writer: &mut impl embedded_io::Write) -> Result { + for did in self.dids { + writer.write_all(&did.to_be_bytes()).map_err(Error::io)?; + } + Ok(self.encoded_size()) + } +} + +#[cfg(test)] +mod test { + use super::*; + use crate::test_util::assert_encode_size_agrees; + + #[test] + fn encode_read_did_request_tx() { + let ids = [0xF180u16, 0xF186u16]; + let req = ReadDataByIdentifierRequestTx::new(&ids); + let mut buf = [0u8; 16]; + let written = Encode::encode(&req, &mut buf.as_mut_slice()).unwrap(); + assert_eq!(written, 4); // 2 DIDs * 2 bytes each + assert_eq!(&buf[..4], &[0xF1, 0x80, 0xF1, 0x86]); + assert_encode_size_agrees(&req); + } +} +``` + +- [ ] **Step 2: Build and test** + +Run: `cargo build && cargo test read_data_by_identifier` +Expected: PASS. + +- [ ] **Step 3: Commit** + +```bash +git add src/services/read_data_by_identifier.rs +git commit -m "$(printf 'de-genericize ReadDataByIdentifierRequestTx to &[u16]\n\nCo-Authored-By: Claude Opus 4.8 ')" +``` + +--- + +## Task 3: De-genericize `WriteDataByIdentifier` request + response + +**Files:** +- Modify: `src/services/write_data_by_identifier.rs` + +- [ ] **Step 1: Replace the file with concrete raw-bytes request + `u16` response** + +Replace the entire contents of `src/services/write_data_by_identifier.rs` with: + +```rust +//! `WriteDataByIdentifier` (0x2E) service implementation +use crate::{Encode, Error, NegativeResponseCode}; + +const WRITE_DID_NEGATIVE_RESPONSE_CODES: [NegativeResponseCode; 5] = [ + NegativeResponseCode::IncorrectMessageLengthOrInvalidFormat, + NegativeResponseCode::ConditionsNotCorrect, + NegativeResponseCode::RequestOutOfRange, + NegativeResponseCode::SecurityAccessDenied, + NegativeResponseCode::GeneralProgrammingFailure, +]; + +/// Zero-alloc TX request to write data by identifier. Borrows the raw payload from the caller. +/// +/// The payload is the DID (2 bytes, big-endian) followed by the data record, exactly as +/// it appears on the wire after the service byte. +/// +/// See ISO-14229-1:2020, Section 11.7.2.1 +#[derive(Clone, Copy, Debug, Eq, PartialEq)] +pub struct WriteDataByIdentifierRequestTx<'d> { + /// The raw payload bytes: DID followed by the data record. + pub payload: &'d [u8], +} + +impl<'d> WriteDataByIdentifierRequestTx<'d> { + /// Create a new write-by-identifier request from raw payload bytes. + #[must_use] + pub const fn new(payload: &'d [u8]) -> Self { + Self { payload } + } + + /// Get the allowed [`NegativeResponseCode`] variants for this request. + #[must_use] + pub fn allowed_nack_codes() -> &'static [NegativeResponseCode] { + &WRITE_DID_NEGATIVE_RESPONSE_CODES + } +} + +impl Encode for WriteDataByIdentifierRequestTx<'_> { + fn encoded_size(&self) -> usize { + self.payload.len() + } + + fn encode(&self, writer: &mut impl embedded_io::Write) -> Result { + writer.write_all(self.payload).map_err(Error::io)?; + Ok(self.payload.len()) + } +} + +/// Positive response to `WriteDataByIdentifier`: echoes the DID that was written. +/// +/// See ISO-14229-1:2020, Section 11.7.3.1 +#[derive(Clone, Copy, Debug, Eq, PartialEq)] +#[non_exhaustive] +pub struct WriteDataByIdentifierResponse { + /// The DID that was written to. + pub identifier: u16, +} + +impl WriteDataByIdentifierResponse { + /// Create a new response echoing the identifier that was written. + #[must_use] + pub const fn new(identifier: u16) -> Self { + Self { identifier } + } +} + +impl Encode for WriteDataByIdentifierResponse { + fn encoded_size(&self) -> usize { + 2 + } + + fn encode(&self, writer: &mut impl embedded_io::Write) -> Result { + writer + .write_all(&self.identifier.to_be_bytes()) + .map_err(Error::io)?; + Ok(2) + } +} + +#[cfg(test)] +mod test { + use super::*; + use crate::test_util::assert_encode_size_agrees; + + #[test] + fn test_write_response_encode() { + let response = WriteDataByIdentifierResponse::new(0xBEEF); + let mut buf = [0u8; 4]; + let written = Encode::encode(&response, &mut buf.as_mut_slice()).unwrap(); + assert_eq!(written, 2); + assert_eq!(buf[0], 0xBE); + assert_eq!(buf[1], 0xEF); + assert_encode_size_agrees(&response); + } + + #[test] + fn test_write_request_encode() { + // DID 0xF186 + one data byte 0x01 + let payload = [0xF1, 0x86, 0x01]; + let request = WriteDataByIdentifierRequestTx::new(&payload); + let mut buf = [0u8; 8]; + let written = Encode::encode(&request, &mut buf.as_mut_slice()).unwrap(); + assert_eq!(written, 3); + assert_eq!(&buf[..3], &[0xF1, 0x86, 0x01]); + assert_encode_size_agrees(&request); + } +} +``` + +- [ ] **Step 2: Build and test** + +Run: `cargo build && cargo test write_data_by_identifier` +Expected: PASS. + +- [ ] **Step 3: Commit** + +```bash +git add src/services/write_data_by_identifier.rs +git commit -m "$(printf 'de-genericize WriteDataByIdentifier to raw bytes + u16 response\n\nCo-Authored-By: Claude Opus 4.8 ')" +``` + +--- + +## Task 4: De-genericize `RoutineControl` and rename to `...Tx` + +**Files:** +- Modify: `src/services/routine_control.rs` +- Modify: `src/services/mod.rs` (only if it names the old types explicitly) + +- [ ] **Step 1: Replace the file with concrete raw-bytes `...Tx` types** + +Replace the entire contents of `src/services/routine_control.rs` with: + +```rust +//! Routine Control (0x31) Service is used to perform functions on the ECU that may not be covered by other services. +//! +//! It can also be used to check the ECU's health, erase memory, or other custom manufacturer/supplier routines. +//! However, some routines may have side effects or require certain preconditions to be met. +use crate::{Encode, Error, RoutineControlSubFunction}; + +/// Used by a client to execute a defined sequence of events and obtain any relevant results. +/// +/// The payload is the routine identifier (2 bytes, big-endian) followed by any optional +/// routine input parameters, exactly as it appears on the wire after the sub-function byte. +#[derive(Clone, Copy, Debug, Eq, PartialEq)] +#[non_exhaustive] +pub struct RoutineControlRequestTx<'d> { + /// The routine control operation (start, stop, or request results). + pub sub_function: RoutineControlSubFunction, + /// The raw payload bytes: routine identifier followed by optional parameters. + pub raw_payload: &'d [u8], +} + +impl<'d> RoutineControlRequestTx<'d> { + /// Create a new `RoutineControlRequestTx`. + #[must_use] + pub const fn new(sub_function: RoutineControlSubFunction, raw_payload: &'d [u8]) -> Self { + Self { + sub_function, + raw_payload, + } + } +} + +impl Encode for RoutineControlRequestTx<'_> { + fn encoded_size(&self) -> usize { + 1 + self.raw_payload.len() + } + + fn encode(&self, writer: &mut impl embedded_io::Write) -> Result { + writer + .write_all(&[u8::from(self.sub_function)]) + .map_err(Error::io)?; + writer.write_all(self.raw_payload).map_err(Error::io)?; + Ok(self.encoded_size()) + } +} + +/// `RoutineControlResponseTx` is a variable-length response that can contain routine status. +/// +/// The status record is the routine identifier echo plus any routine-info / status bytes, +/// held as raw bytes. +#[derive(Clone, Copy, Debug, Eq, PartialEq)] +#[non_exhaustive] +pub struct RoutineControlResponseTx<'d> { + /// The sub-function echoed from the routine control request. + pub routine_control_type: RoutineControlSubFunction, + /// Raw routine status record bytes (routine identifier + routine info + status). + pub raw_status_record: &'d [u8], +} + +impl<'d> RoutineControlResponseTx<'d> { + /// Create a new `RoutineControlResponseTx`. + #[must_use] + pub const fn new( + routine_control_type: RoutineControlSubFunction, + raw_status_record: &'d [u8], + ) -> Self { + Self { + routine_control_type, + raw_status_record, + } + } +} + +impl Encode for RoutineControlResponseTx<'_> { + fn encoded_size(&self) -> usize { + 1 + self.raw_status_record.len() + } + + fn encode(&self, writer: &mut impl embedded_io::Write) -> Result { + writer + .write_all(&[u8::from(self.routine_control_type)]) + .map_err(Error::io)?; + writer + .write_all(self.raw_status_record) + .map_err(Error::io)?; + Ok(self.encoded_size()) + } +} + +#[cfg(test)] +mod test { + use super::*; + use crate::test_util::assert_encode_size_agrees; + + #[test] + fn encode_routine_control_request_tx() { + // RID 0xFF00 (EraseMemory) + 1 parameter byte + let payload = [0xFF, 0x00, 0xAA]; + let req = RoutineControlRequestTx::new(RoutineControlSubFunction::StartRoutine, &payload); + let mut buf = [0u8; 8]; + let written = Encode::encode(&req, &mut buf.as_mut_slice()).unwrap(); + assert_eq!(&buf[..written], &[0x01, 0xFF, 0x00, 0xAA]); + assert_encode_size_agrees(&req); + } + + #[test] + fn encode_routine_control_response_tx() { + let record = [0xFF, 0x00, 0x10]; + let resp = + RoutineControlResponseTx::new(RoutineControlSubFunction::StartRoutine, &record); + let mut buf = [0u8; 8]; + let written = Encode::encode(&resp, &mut buf.as_mut_slice()).unwrap(); + assert_eq!(&buf[..written], &[0x01, 0xFF, 0x00, 0x10]); + assert_encode_size_agrees(&resp); + } +} +``` + +- [ ] **Step 2: Update `services/mod.rs` if it names the old types** + +Run: `grep -n "RoutineControl" src/services/mod.rs` +If it re-exports explicit names (e.g. `pub use routine_control::{RoutineControlRequest, RoutineControlResponse};`), rename them to `RoutineControlRequestTx, RoutineControlResponseTx`. If it uses `pub use routine_control::*;`, no change is needed. + +- [ ] **Step 3: Build and test** + +Run: `cargo build && cargo test routine_control` +Expected: PASS. + +- [ ] **Step 4: Commit** + +```bash +git add src/services/routine_control.rs src/services/mod.rs +git commit -m "$(printf 'de-genericize RoutineControl to raw-bytes RoutineControl*Tx types\n\nCo-Authored-By: Claude Opus 4.8 ')" +``` + +--- + +## Task 5: Remove `DiagnosticDefinition` and `UdsSpec` + +**Files:** +- Modify: `src/traits.rs` +- Modify: `src/lib.rs` + +- [ ] **Step 1: Delete the `DiagnosticDefinition` trait from `src/traits.rs`** + +Remove this entire block (currently around lines 143–154): + +```rust +/// Trait for diagnostic definitions that specifies the identifier and payload +/// types used when constructing and parsing UDS requests and responses. +pub trait DiagnosticDefinition<'a> { + /// UDS Data Identifier type. + type DID: Identifier + Clone + core::fmt::Debug + PartialEq + 'static; + /// Payload type for read/write data by identifier etc. + type DiagnosticPayload: Encode + Clone + core::fmt::Debug + PartialEq + 'a; + /// UDS Routine Identifier type. + type RID: RoutineIdentifier + Clone + core::fmt::Debug + PartialEq + 'static; + /// Payload type for routine control requests/responses. + type RoutinePayload: Encode + Clone + core::fmt::Debug + PartialEq + 'a; +} +``` + +- [ ] **Step 2: Delete `UdsSpec` and its impl from `src/lib.rs`** + +Remove the `UdsSpec` struct (around lines 38–45) and its `impl<'a> DiagnosticDefinition<'a> for UdsSpec { ... }` block (around lines 47–52). + +- [ ] **Step 3: Update the `traits` re-export in `src/lib.rs`** + +Change: + +```rust +pub use traits::{Decode, DecodeIter, DiagnosticDefinition, Encode, Identifier, RoutineIdentifier}; +``` + +to: + +```rust +pub use traits::{Decode, DecodeIter, Encode, Identifier, RoutineIdentifier}; +``` + +(`Identifier`/`RoutineIdentifier` are removed in Task 7; leaving them here keeps this commit compiling.) + +- [ ] **Step 4: Build and test** + +Run: `cargo build && cargo test` +Expected: PASS — nothing consumed `DiagnosticDefinition` or `UdsSpec`. + +- [ ] **Step 5: Commit** + +```bash +git add src/traits.rs src/lib.rs +git commit -m "$(printf 'remove orphaned DiagnosticDefinition trait and UdsSpec\n\nCo-Authored-By: Claude Opus 4.8 ')" +``` + +--- + +## Task 6: Delete `protocol_definitions.rs` + +**Files:** +- Delete: `src/protocol_definitions.rs` +- Modify: `src/lib.rs` + +- [ ] **Step 1: Confirm no remaining references outside the module itself** + +Run: `grep -rn "ProtocolIdentifier\|ProtocolPayloadTx\|ProtocolRoutinePayloadTx\|protocol_definitions" src/ | grep -v "src/protocol_definitions.rs"` +Expected: only the two lines in `src/lib.rs` (the `mod` + `pub use`). Tasks 3–4 already removed the `ProtocolPayloadTx` test usages. If any other reference appears, stop and fix it first. + +- [ ] **Step 2: Delete the module file** + +Run: `git rm src/protocol_definitions.rs` + +- [ ] **Step 3: Remove the module declaration and re-export from `src/lib.rs`** + +Delete these two lines: + +```rust +mod protocol_definitions; +pub use protocol_definitions::{ProtocolIdentifier, ProtocolPayloadTx, ProtocolRoutinePayloadTx}; +``` + +- [ ] **Step 4: Build and test** + +Run: `cargo build && cargo test` +Expected: PASS. + +- [ ] **Step 5: Commit** + +```bash +git add -A src/protocol_definitions.rs src/lib.rs +git commit -m "$(printf 'delete protocol_definitions module (ProtocolIdentifier/PayloadTx)\n\nCo-Authored-By: Claude Opus 4.8 ')" +``` + +--- + +## Task 7: Remove identifier machinery; add direct codec to UDS identifiers + +This task is atomic: the blanket `impl` and a direct `impl` for `UDSIdentifier` cannot coexist (coherence conflict), so the traits and direct impls must change together. + +**Files:** +- Modify: `src/traits.rs` +- Modify: `src/common/diagnostic_identifier.rs` +- Modify: `src/lib.rs` + +- [ ] **Step 1: Remove identifier traits, macro, and blanket impls from `src/traits.rs`** + +Delete the `Identifier` trait, the `impl_identifier!` macro, the `RoutineIdentifier` trait, and all three blanket impls (`Encode`, `Decode`, `DecodeIter` for `T: Identifier`) — currently around lines 70–141. Also delete the `traits.rs` test module's `MyIdentifier` enum and its two identifier tests (around lines 156–222), since they depend on `impl_identifier!`. Keep the `Encode`, `Decode`, `DecodeIter` trait definitions. + +- [ ] **Step 2: Add direct `Encode`/`Decode` impls for the UDS identifier enums** + +In `src/common/diagnostic_identifier.rs`, change the import line: + +```rust +use crate::{Error, impl_identifier, traits::RoutineIdentifier}; +``` + +to: + +```rust +use crate::{Decode, Encode, Error}; +``` + +Delete the two `impl_identifier!(UDSIdentifier);` / `impl_identifier!(UDSRoutineIdentifier);` lines and the `impl RoutineIdentifier for UDSRoutineIdentifier {}` line. + +Add, at the end of the file: + +```rust +impl Encode for UDSIdentifier { + fn encoded_size(&self) -> usize { + 2 + } + + fn encode(&self, writer: &mut impl embedded_io::Write) -> Result { + writer + .write_all(&u16::from(*self).to_be_bytes()) + .map_err(Error::io)?; + Ok(2) + } +} + +impl<'a> Decode<'a> for UDSIdentifier { + fn decode(buf: &'a [u8]) -> Result<(Self, &'a [u8]), Error> { + if buf.len() < 2 { + return Err(Error::IncorrectMessageLengthOrInvalidFormat); + } + let raw = u16::from_be_bytes([buf[0], buf[1]]); + Ok((Self::try_from(raw)?, &buf[2..])) + } +} + +impl Encode for UDSRoutineIdentifier { + fn encoded_size(&self) -> usize { + 2 + } + + fn encode(&self, writer: &mut impl embedded_io::Write) -> Result { + writer + .write_all(&u16::from(*self).to_be_bytes()) + .map_err(Error::io)?; + Ok(2) + } +} + +impl<'a> Decode<'a> for UDSRoutineIdentifier { + fn decode(buf: &'a [u8]) -> Result<(Self, &'a [u8]), Error> { + if buf.len() < 2 { + return Err(Error::IncorrectMessageLengthOrInvalidFormat); + } + let raw = u16::from_be_bytes([buf[0], buf[1]]); + Ok((Self::from(raw), &buf[2..])) + } +} + +#[cfg(test)] +mod codec_tests { + use super::*; + use crate::test_util::assert_encode_size_agrees; + + #[test] + fn uds_identifier_roundtrip() { + let id = UDSIdentifier::ActiveDiagnosticSession; + let mut buf = [0u8; 2]; + Encode::encode(&id, &mut buf.as_mut_slice()).unwrap(); + assert_eq!(buf, [0xF1, 0x86]); + let (decoded, rest) = ::decode(&buf).unwrap(); + assert_eq!(decoded, id); + assert!(rest.is_empty()); + assert_encode_size_agrees(&id); + } + + #[test] + fn uds_routine_identifier_roundtrip() { + let id = UDSRoutineIdentifier::EraseMemory; + let mut buf = [0u8; 2]; + Encode::encode(&id, &mut buf.as_mut_slice()).unwrap(); + assert_eq!(buf, [0xFF, 0x00]); + let (decoded, rest) = ::decode(&buf).unwrap(); + assert_eq!(decoded, id); + assert!(rest.is_empty()); + assert_encode_size_agrees(&id); + } +} +``` + +- [ ] **Step 3: Update the `traits` re-export in `src/lib.rs`** + +Change: + +```rust +pub use traits::{Decode, DecodeIter, Encode, Identifier, RoutineIdentifier}; +``` + +to: + +```rust +pub use traits::{Decode, DecodeIter, Encode}; +``` + +- [ ] **Step 4: Build and test** + +Run: `cargo build && cargo test diagnostic_identifier` +Expected: PASS. Then `cargo build` (full crate) to confirm nothing else referenced the removed traits. + +- [ ] **Step 5: Commit** + +```bash +git add src/traits.rs src/common/diagnostic_identifier.rs src/lib.rs +git commit -m "$(printf 'remove Identifier machinery; add direct codec to UDS identifiers\n\nCo-Authored-By: Claude Opus 4.8 ')" +``` + +--- + +## Task 8: Move `is_positive_response_suppressed` off the `Encode` trait + +**Files:** +- Modify: `src/traits.rs` +- Modify: `src/services/ecu_reset.rs`, `control_dtc_settings.rs`, `tester_present.rs`, `security_access.rs`, `diagnostic_session_control.rs` +- Modify: `src/request.rs` + +- [ ] **Step 1: Remove the method from the `Encode` trait** + +In `src/traits.rs`, delete from the `Encode` trait: + +```rust + /// Whether the positive response for this message is suppressed (SPRMIB). + fn is_positive_response_suppressed(&self) -> bool { + false + } +``` + +- [ ] **Step 2: Remove the trait-method overrides from each service `Encode` impl** + +In each of `ecu_reset.rs`, `control_dtc_settings.rs`, `tester_present.rs`, `security_access.rs`, `diagnostic_session_control.rs`, delete the `fn is_positive_response_suppressed(&self) -> bool { ... }` block from inside its `impl Encode for ...` block. Confirm with: `grep -rn "fn is_positive_response_suppressed" src/services/` — expect no matches afterward. + +- [ ] **Step 3: Add an inherent `suppress_positive_response()` to `ControlDTCSettingsRequest`** + +`ControlDTCSettingsRequest` exposes a public `suppress_response` field but no getter matching the other services. In `src/services/control_dtc_settings.rs`, add to its inherent `impl ControlDTCSettingsRequest` block: + +```rust + /// Whether the server should suppress the positive response (SPRMIB). + #[must_use] + pub const fn suppress_positive_response(&self) -> bool { + self.suppress_response + } +``` + +(ecu_reset, tester_present, security_access, diagnostic_session_control, and communication_control already have inherent `suppress_positive_response()` getters.) + +- [ ] **Step 4: Replace the `Request` trait override with an inherent method** + +In `src/request.rs`, remove the `fn is_positive_response_suppressed(&self) -> bool { ... }` block from the `impl Encode for Request<'_>` block, and add this inherent method to the `impl Request<'_>` block (the one that also defines `service`): + +```rust + /// Whether the positive response for this request is suppressed (SPRMIB). + #[must_use] + pub fn is_positive_response_suppressed(&self) -> bool { + match self { + Self::CommunicationControl(req) => req.suppress_positive_response(), + Self::ControlDTCSettings(req) => req.suppress_positive_response(), + Self::DiagnosticSessionControl(req) => req.suppress_positive_response(), + Self::EcuReset(req) => req.suppress_positive_response(), + Self::SecurityAccess(req) => req.suppress_positive_response(), + Self::TesterPresent(req) => req.suppress_positive_response(), + _ => false, + } + } +``` + +The existing `suppression_forwards_to_inner_request` test calls `.is_positive_response_suppressed()` and now resolves to this inherent method, so it is unchanged. + +- [ ] **Step 5: Build and test** + +Run: `cargo build && cargo test` +Expected: PASS. + +- [ ] **Step 6: Commit** + +```bash +git add src/traits.rs src/request.rs src/services/ +git commit -m "$(printf 'move is_positive_response_suppressed off the Encode trait\n\nCo-Authored-By: Claude Opus 4.8 ')" +``` + +--- + +## Task 9: Add symmetric `Other` escape hatch; remove `UdsResponse` and `ServiceNotImplemented` + +**Files:** +- Modify: `src/request.rs` +- Modify: `src/response.rs` +- Modify: `src/error.rs` +- Modify: `src/lib.rs` + +- [ ] **Step 1: Write failing tests for the `Other` variants** + +In `src/request.rs` `mod tests`, add: + +```rust + #[test] + fn unmodeled_service_decodes_to_other() { + // 0x23 = ReadMemoryByAddress, enumerated but not modeled. + let frame = [0x23, 0xAA, 0xBB]; + let (req, rest) = Request::decode(&frame).unwrap(); + assert!(rest.is_empty()); + match req { + Request::Other { service, data } => { + assert_eq!(service, UdsServiceType::ReadMemoryByAddress); + assert_eq!(data, &[0xAA, 0xBB]); + } + other => panic!("expected Other, got {other:?}"), + } + let mut buf = [0u8; 8]; + let written = Encode::encode(&req, &mut buf.as_mut_slice()).unwrap(); + assert_eq!(&buf[..written], &frame); + } +``` + +In `src/response.rs`, add a test module: + +```rust +#[cfg(test)] +mod tests { + use super::*; + + #[test] + fn unmodeled_response_decodes_to_other() { + // 0x63 = ReadMemoryByAddress positive response, not modeled. + let frame = [0x63, 0x01, 0x02]; + let (resp, rest) = Response::decode(&frame).unwrap(); + assert!(rest.is_empty()); + match resp { + Response::Other { service, data } => { + assert_eq!(service, UdsServiceType::ReadMemoryByAddress); + assert_eq!(data, &[0x01, 0x02]); + } + other => panic!("expected Other, got {other:?}"), + } + let mut buf = [0u8; 8]; + let written = Encode::encode(&resp, &mut buf.as_mut_slice()).unwrap(); + assert_eq!(&buf[..written], &frame); + } +} +``` + +- [ ] **Step 2: Run the tests to verify they fail** + +Run: `cargo test unmodeled` +Expected: FAIL — no `Other` variant exists. + +- [ ] **Step 3: Add `Other` to `Request<'a>`** + +In `src/request.rs`, add to the `Request<'a>` enum: + +```rust + /// A known-but-unmodeled (or unrecognized) service. Carries the service type and + /// the raw payload bytes following the service identifier, for pass-through. + Other { + /// The service this frame addresses. + service: UdsServiceType, + /// Raw payload bytes after the service byte. + data: &'a [u8], + }, +``` + +In `Request::decode`, replace `_ => return Err(Error::ServiceNotImplemented(service)),` with: + +```rust + _ => Self::Other { + service, + data: payload, + }, +``` + +In `Request::encoded_size`, add to the payload match: `Self::Other { data, .. } => data.len(),` + +In `Request::encode`, add to the payload match: + +```rust + Self::Other { data, .. } => { + writer.write_all(data).map_err(Error::io)?; + data.len() + } +``` + +In `Request::service`, add: `Self::Other { service, .. } => *service,` + +- [ ] **Step 4: Add `Other` to `Response<'a>`; remove `UdsResponse`** + +In `src/response.rs`, add to the `Response<'a>` enum: + +```rust + /// A known-but-unmodeled (or unrecognized) service response. Carries the service + /// type and the raw payload bytes following the service identifier. + Other { + /// The service this response addresses. + service: UdsServiceType, + /// Raw payload bytes after the service byte. + data: &'a [u8], + }, +``` + +In `Response::decode`, replace `_ => return Err(Error::ServiceNotImplemented(service)),` with: + +```rust + _ => Self::Other { + service, + data: payload, + }, +``` + +In `Response::response_sid`, add: `Self::Other { service, .. } => service.response_to_byte(),` + +In `Response::encoded_size`, add: `Self::Other { data, .. } => data.len(),` + +In `Response::encode`, add to the payload match: + +```rust + Self::Other { data, .. } => { + writer.write_all(data).map_err(Error::io)?; + data.len() + } +``` + +Delete the entire `UdsResponse<'a>` struct and its `impl<'a> Decode<'a> for UdsResponse<'a>` (currently lines ~206–228). + +- [ ] **Step 5: Remove the `UdsResponse` re-export from `src/lib.rs`** + +Change `pub use response::{Response, UdsResponse};` to `pub use response::Response;` + +- [ ] **Step 6: Remove `ServiceNotImplemented` from `src/error.rs`** + +Delete: + +```rust + /// The service type is not yet implemented in this crate. + #[error("UDS service not implemented: {0:?}")] + ServiceNotImplemented(crate::UdsServiceType), +``` + +- [ ] **Step 7: Run tests** + +Run: `cargo test` +Expected: PASS, including the new `unmodeled` tests. Confirm no stragglers: `grep -rn "UdsResponse\|ServiceNotImplemented" src/` — expect no matches. + +- [ ] **Step 8: Commit** + +```bash +git add src/request.rs src/response.rs src/error.rs src/lib.rs +git commit -m "$(printf 'add symmetric Other escape hatch; drop UdsResponse + ServiceNotImplemented\n\nCo-Authored-By: Claude Opus 4.8 ')" +``` + +--- + +## Task 10: Document the `Decode` remainder / borrow contract + +**Files:** +- Modify: `src/traits.rs` + +- [ ] **Step 1: Expand the `Decode` trait doc comment** + +Replace the existing `Decode` trait doc comment (the `/// RX-side trait: zero-copy decode ...` block above `pub trait Decode<'a>`) with: + +```rust +/// RX-side trait: zero-copy decode from a byte slice. +/// +/// Implementations borrow directly from the input buffer where possible. The decoded +/// value points into `buf` and is valid only as long as `buf` lives — for C developers +/// new to Rust, think of it like a `struct` overlaid on a `char buf[]`. Copy out any +/// fields you need to retain beyond the buffer's lifetime. +/// +/// [`decode`](Self::decode) returns the value together with the unconsumed remainder of +/// the buffer, so leaf and sequence decoders can be composed. Frame-level decoders +/// (`Request`, `Response`) consume the whole buffer and return an empty remainder; use +/// [`decode_exact`](Self::decode_exact) when a buffer must contain exactly one value. +``` + +- [ ] **Step 2: Build docs** + +Run: `cargo build && cargo doc --no-deps` +Expected: PASS, no rustdoc warnings. + +- [ ] **Step 3: Commit** + +```bash +git add src/traits.rs +git commit -m "$(printf 'document the Decode remainder / borrow contract\n\nCo-Authored-By: Claude Opus 4.8 ')" +``` + +--- + +## Task 11: README integration + borrow-model docs + +**Files:** +- Modify: `README.md` + +- [ ] **Step 1: Append an Integration section to `README.md`** + +Add at the end of `README.md`: + +````markdown +## Integration + +`uds_protocol` is a synchronous, allocation-free codec. It owns no sockets, buffers, or +async runtime. To use it over any transport (DoIP, UDSonIP, ISO-TP, …): + +- **Decode** an inbound frame from the `&[u8]` you received. +- **Encode** an outbound frame into any `embedded_io::Write` (or a caller-owned buffer + sized with `encoded_size()`). + +Drive the I/O loop from your own sync or async layer — the crate never blocks or awaits. + +### Encode (build a request) + +```rust +use uds_protocol::{Encode, TesterPresentRequest}; + +let req = TesterPresentRequest::new(false); +let mut buf = [0u8; 8]; +let mut writer = buf.as_mut_slice(); +let written = Encode::encode(&req, &mut writer).unwrap(); +// `buf[..written]` is the wire frame, ready to hand to your transport. +``` + +### Decode (parse a response) + +```rust +use uds_protocol::{Decode, Response}; + +// `frame` is the &[u8] your transport handed you. +let frame = [0x7E, 0x00]; +let (response, _rest) = Response::decode(&frame).unwrap(); +``` + +The decoded value **borrows** from `frame`: it points into that buffer (like a `struct` +overlaid on a `char buf[]`) and is valid only while `frame` lives. Copy out any fields +you need to keep before the buffer is reused. +```` + +- [ ] **Step 2: Verify the doctests compile (README is included as crate docs)** + +Run: `cargo test --doc` +Expected: PASS — `src/lib.rs` includes `README.md` via `#![doc = include_str!(...)]`, so the snippets run as doctests. If a referenced symbol (e.g. `TesterPresentRequest`) is not exported at the crate root, adjust the snippet's import path to match the actual re-export. + +- [ ] **Step 3: Commit** + +```bash +git add README.md +git commit -m "$(printf 'document runtime-agnostic integration model and borrow semantics\n\nCo-Authored-By: Claude Opus 4.8 ')" +``` + +--- + +## Task 12: Apply the agreement helper to the remaining service tests + +**Files:** +- Modify: `src/services/ecu_reset.rs`, `tester_present.rs`, `communication_control.rs`, `diagnostic_session_control.rs`, `clear_dtc_information.rs`, `security_access.rs`, `request_download.rs`, `transfer_data.rs`, `request_file_transfer.rs`, `control_dtc_settings.rs`, `negative_response.rs` + +- [ ] **Step 1: Add an agreement assertion to each service's existing encode test** + +For each module above: add `use crate::test_util::assert_encode_size_agrees;` to the test module's imports, and append `assert_encode_size_agrees(&);` to the existing test that builds and encodes a value (reuse the request/response value already constructed there). Example for `ecu_reset.rs`: + +```rust + use crate::test_util::assert_encode_size_agrees; + // ...inside the existing encode test, after `request` is built: + assert_encode_size_agrees(&request); +``` + +If a module has no encode test that builds a value, add a minimal one using that file's `new` constructor and an appropriately sized stack buffer. + +- [ ] **Step 2: Test** + +Run: `cargo test` +Expected: PASS. A failure here is a real `encode`/`encoded_size` mismatch — fix the offending `encoded_size` to match the bytes `encode` writes, then re-run. + +- [ ] **Step 3: Commit** + +```bash +git add src/services/ +git commit -m "$(printf 'assert encode/encoded_size agreement across all services\n\nCo-Authored-By: Claude Opus 4.8 ')" +``` + +--- + +## Task 13: Document the service-coverage boundary + +**Files:** +- Modify: `src/lib.rs` + +- [ ] **Step 1: Add a crate-root doc block listing modeled vs pass-through services** + +In `src/lib.rs`, add this doc comment immediately above the `pub const SUCCESS: u8 = 0x80;` declaration: + +```rust +/// ## Service coverage +/// +/// These services decode into typed [`Request`]/[`Response`] variants: +/// `DiagnosticSessionControl`, `EcuReset`, `SecurityAccess`, `CommunicationControl`, +/// `TesterPresent`, `ControlDTCSettings`, `ReadDataByIdentifier`, `WriteDataByIdentifier`, +/// `ClearDiagnosticInfo`, `ReadDTCInfo`, `RoutineControl`, `RequestDownload`, +/// `TransferData`, `RequestTransferExit`, `RequestFileTransfer`, and `NegativeResponse`. +/// +/// All other services enumerated in [`UdsServiceType`] (e.g. `Authentication`, +/// `ReadMemoryByAddress`, `RequestUpload`, `ResponseOnEvent`) are not individually +/// modeled. Frames for them decode into [`Request::Other`] / [`Response::Other`], +/// carrying the service type and raw payload bytes for pass-through. +``` + +- [ ] **Step 2: Build docs** + +Run: `cargo doc --no-deps` +Expected: PASS, no warnings, no broken intra-doc links. + +- [ ] **Step 3: Commit** + +```bash +git add src/lib.rs +git commit -m "$(printf 'document the modeled vs pass-through service coverage boundary\n\nCo-Authored-By: Claude Opus 4.8 ')" +``` + +--- + +## Task 14: Full verification across the feature matrix + +**Files:** none (verification only) + +- [ ] **Step 1: Host builds across feature combos** + +```bash +cargo build +cargo build --no-default-features --features alloc +cargo build --no-default-features +``` +Expected: all succeed. + +- [ ] **Step 2: Tests** + +Run: `cargo test` +Expected: all pass (pre-refactor baseline was 87; expect that plus the new `Other`, identifier-codec, and size-agreement tests). + +- [ ] **Step 3: Clippy across host combos (crate sets `#![warn(clippy::pedantic, missing_docs)]`)** + +```bash +cargo clippy --all-targets +cargo clippy --no-default-features --features alloc --all-targets +cargo clippy --no-default-features --all-targets +``` +Expected: zero warnings. + +- [ ] **Step 4: Bare-metal target** + +```bash +cargo build --no-default-features --target thumbv6m-none-eabi +cargo build --no-default-features --features alloc --target thumbv6m-none-eabi +``` +Expected: success. (If missing: `rustup target add thumbv6m-none-eabi`.) + +- [ ] **Step 5: Confirm no orphaned references remain** + +Run: `grep -rn "DiagnosticDefinition\|UdsSpec\|ProtocolIdentifier\|ProtocolPayloadTx\|impl_identifier\|ServiceNotImplemented\|UdsResponse\|: Identifier\|: RoutineIdentifier" src/` +Expected: no matches. + +- [ ] **Step 6: Commit any verification fixes** + +If steps 1–5 required changes (clippy fixes, doc tweaks), commit them; otherwise nothing to commit: + +```bash +git add -A +git commit -m "$(printf 'verification fixes across the no_std feature matrix\n\nCo-Authored-By: Claude Opus 4.8 ')" +``` + +--- + +## Self-Review Notes + +**Spec coverage:** Decision 1 → Task 5; Decision 2 → Tasks 6–7; Decision 3 → Tasks 2–4; Decision 4 (naming) → Task 4 (RoutineControl rename) + Task 3 (WriteDataByIdentifierRequestTx), already-conforming types unchanged; Decision 5 → Task 9; Decision 6 → Task 8; Decision 7 → Tasks 1 + 12; Decision 8 → Task 10; Decision 9 → Task 11; Decision 10 → Task 13. Open item (`ServiceNotImplemented` fate) resolved in Task 9: removed, fully subsumed by `Other`. + +**Type consistency:** `assert_encode_size_agrees` (Task 1) is used identically everywhere. New public names — `ReadDataByIdentifierRequestTx<'d>` (`&[u16]`), `WriteDataByIdentifierRequestTx<'d>` / `WriteDataByIdentifierResponse { identifier: u16 }`, `RoutineControlRequestTx<'d>` / `RoutineControlResponseTx<'d>`, `Request::Other { service, data }` / `Response::Other { service, data }` — are referenced consistently across tasks. + +**Verification:** Task 14 enforces the same matrix the existing CI uses (three host feature combos + `thumbv6m-none-eabi` + clippy), so the refactor lands against the project's real definition of green. From 7c74cce83428ca0b05c2b7b1d02a022f8927e81d Mon Sep 17 00:00:00 2001 From: Zach Heylmun Date: Tue, 2 Jun 2026 11:37:10 -0400 Subject: [PATCH 26/58] add encode/encoded_size agreement test helper --- src/lib.rs | 3 +++ src/test_util.rs | 19 +++++++++++++++++++ 2 files changed, 22 insertions(+) create mode 100644 src/test_util.rs diff --git a/src/lib.rs b/src/lib.rs index 001263a..f4dfcae 100644 --- a/src/lib.rs +++ b/src/lib.rs @@ -8,6 +8,9 @@ extern crate alloc; mod error; pub use error::Error; +#[cfg(test)] +mod test_util; + mod traits; pub use traits::{Decode, DecodeIter, DiagnosticDefinition, Encode, Identifier, RoutineIdentifier}; diff --git a/src/test_util.rs b/src/test_util.rs new file mode 100644 index 0000000..72e8991 --- /dev/null +++ b/src/test_util.rs @@ -0,0 +1,19 @@ +//! Test-only helpers shared across the crate. + +use crate::Encode; + +/// Assert that an [`Encode`] value writes exactly `encoded_size()` bytes. +/// +/// Guards against the two methods drifting, which would corrupt callers that pre-size +/// a buffer from `encoded_size()`. +pub(crate) fn assert_encode_size_agrees(value: &T) { + let mut buf = [0u8; 512]; + let mut writer = buf.as_mut_slice(); + let written = value.encode(&mut writer).unwrap(); + assert_eq!( + written, + value.encoded_size(), + "encode wrote {written} bytes but encoded_size() reported {}", + value.encoded_size() + ); +} From 7028fffb5b7c917fd347aff566d88d862ba70b1f Mon Sep 17 00:00:00 2001 From: Zach Heylmun Date: Tue, 2 Jun 2026 11:44:18 -0400 Subject: [PATCH 27/58] de-genericize ReadDataByIdentifierRequestTx to &[u16] --- src/services/read_data_by_identifier.rs | 28 +++++++++++++------------ 1 file changed, 15 insertions(+), 13 deletions(-) diff --git a/src/services/read_data_by_identifier.rs b/src/services/read_data_by_identifier.rs index d5eb7a2..a8de609 100644 --- a/src/services/read_data_by_identifier.rs +++ b/src/services/read_data_by_identifier.rs @@ -1,5 +1,5 @@ //! `ReadDataByIdentifier` (0x22) service implementation -use crate::{Encode, Error, Identifier, NegativeResponseCode}; +use crate::{Encode, Error, NegativeResponseCode}; const READ_DID_NEGATIVE_RESPONSE_CODES: [NegativeResponseCode; 5] = [ NegativeResponseCode::IncorrectMessageLengthOrInvalidFormat, @@ -9,19 +9,22 @@ const READ_DID_NEGATIVE_RESPONSE_CODES: [NegativeResponseCode; 5] = [ NegativeResponseCode::SecurityAccessDenied, ]; -/// Zero-alloc TX request to read data by identifier. Borrows DID list from caller. +/// Zero-alloc TX request to read data by identifier. Borrows the DID list from the caller. +/// +/// A Data Identifier is a 16-bit value, so the list is held as `&[u16]`; each DID is +/// written big-endian on the wire. /// /// See ISO-14229-1:2020, Table 11.2.1 for format information #[derive(Clone, Copy, Debug, Eq, PartialEq)] -pub struct ReadDataByIdentifierRequestTx<'d, DataIdentifier> { +pub struct ReadDataByIdentifierRequestTx<'d> { /// The list of Data Identifiers to read. - pub dids: &'d [DataIdentifier], + pub dids: &'d [u16], } -impl<'d, DataIdentifier: Identifier> ReadDataByIdentifierRequestTx<'d, DataIdentifier> { +impl<'d> ReadDataByIdentifierRequestTx<'d> { /// Create a new request from a slice of data identifiers. #[must_use] - pub const fn new(dids: &'d [DataIdentifier]) -> Self { + pub const fn new(dids: &'d [u16]) -> Self { Self { dids } } @@ -32,14 +35,14 @@ impl<'d, DataIdentifier: Identifier> ReadDataByIdentifierRequestTx<'d, DataIdent } } -impl Encode for ReadDataByIdentifierRequestTx<'_, DataIdentifier> { +impl Encode for ReadDataByIdentifierRequestTx<'_> { fn encoded_size(&self) -> usize { self.dids.len() * 2 } fn encode(&self, writer: &mut impl embedded_io::Write) -> Result { for did in self.dids { - Encode::encode(did, writer)?; + writer.write_all(&did.to_be_bytes()).map_err(Error::io)?; } Ok(self.encoded_size()) } @@ -48,17 +51,16 @@ impl Encode for ReadDataByIdentifierRequestTx<'_, Da #[cfg(test)] mod test { use super::*; - use crate::{ProtocolIdentifier, UDSIdentifier}; + use crate::test_util::assert_encode_size_agrees; #[test] fn encode_read_did_request_tx() { - let ids = [ - ProtocolIdentifier::new(UDSIdentifier::BootSoftwareIdentification), - ProtocolIdentifier::new(UDSIdentifier::ActiveDiagnosticSession), - ]; + let ids = [0xF180u16, 0xF186u16]; let req = ReadDataByIdentifierRequestTx::new(&ids); let mut buf = [0u8; 16]; let written = Encode::encode(&req, &mut buf.as_mut_slice()).unwrap(); assert_eq!(written, 4); // 2 DIDs * 2 bytes each + assert_eq!(&buf[..4], &[0xF1, 0x80, 0xF1, 0x86]); + assert_encode_size_agrees(&req); } } From f12cb02a71cbd5c3590b0c96eb858b8f7619691b Mon Sep 17 00:00:00 2001 From: Zach Heylmun Date: Tue, 2 Jun 2026 11:57:53 -0400 Subject: [PATCH 28/58] de-genericize WriteDataByIdentifier to raw bytes + u16 response --- src/services/mod.rs | 2 +- src/services/write_data_by_identifier.rs | 90 ++++++++++-------------- 2 files changed, 40 insertions(+), 52 deletions(-) diff --git a/src/services/mod.rs b/src/services/mod.rs index 21a4a24..a101863 100644 --- a/src/services/mod.rs +++ b/src/services/mod.rs @@ -49,4 +49,4 @@ mod transfer_data; pub use transfer_data::{TransferDataRequestTx, TransferDataResponseTx}; mod write_data_by_identifier; -pub use write_data_by_identifier::{WriteDataByIdentifierRequest, WriteDataByIdentifierResponse}; +pub use write_data_by_identifier::{WriteDataByIdentifierRequestTx, WriteDataByIdentifierResponse}; diff --git a/src/services/write_data_by_identifier.rs b/src/services/write_data_by_identifier.rs index 1aff4ef..0563409 100644 --- a/src/services/write_data_by_identifier.rs +++ b/src/services/write_data_by_identifier.rs @@ -1,5 +1,5 @@ //! `WriteDataByIdentifier` (0x2E) service implementation -use crate::{Encode, Error, Identifier, NegativeResponseCode}; +use crate::{Encode, Error, NegativeResponseCode}; const WRITE_DID_NEGATIVE_RESPONSE_CODES: [NegativeResponseCode; 5] = [ NegativeResponseCode::IncorrectMessageLengthOrInvalidFormat, @@ -9,19 +9,22 @@ const WRITE_DID_NEGATIVE_RESPONSE_CODES: [NegativeResponseCode; 5] = [ NegativeResponseCode::GeneralProgrammingFailure, ]; +/// Zero-alloc TX request to write data by identifier. Borrows the raw payload from the caller. +/// +/// The payload is the DID (2 bytes, big-endian) followed by the data record, exactly as +/// it appears on the wire after the service byte. +/// /// See ISO-14229-1:2020, Section 11.7.2.1 -#[cfg_attr(feature = "serde", derive(serde::Deserialize, serde::Serialize))] -#[cfg_attr(feature = "utoipa", derive(utoipa::ToSchema))] -#[derive(Clone, Debug, Eq, PartialEq)] -#[non_exhaustive] -pub struct WriteDataByIdentifierRequest { - /// The payload to write, which includes the DID and data. - pub payload: Payload, +#[derive(Clone, Copy, Debug, Eq, PartialEq)] +pub struct WriteDataByIdentifierRequestTx<'d> { + /// The raw payload bytes: DID followed by the data record. + pub payload: &'d [u8], } -impl WriteDataByIdentifierRequest { - /// Create a new write-by-identifier request. - pub fn new(payload: Payload) -> Self { +impl<'d> WriteDataByIdentifierRequestTx<'d> { + /// Create a new write-by-identifier request from raw payload bytes. + #[must_use] + pub const fn new(payload: &'d [u8]) -> Self { Self { payload } } @@ -32,88 +35,73 @@ impl WriteDataByIdentifierRequest { } } -impl Encode for WriteDataByIdentifierRequest { +impl Encode for WriteDataByIdentifierRequestTx<'_> { fn encoded_size(&self) -> usize { - self.payload.encoded_size() + self.payload.len() } fn encode(&self, writer: &mut impl embedded_io::Write) -> Result { - self.payload.encode(writer) + writer.write_all(self.payload).map_err(Error::io)?; + Ok(self.payload.len()) } } -/////////////////////////////////////////////////////////////////////////////////////////////////// - +/// Positive response to `WriteDataByIdentifier`: echoes the DID that was written. +/// /// See ISO-14229-1:2020, Section 11.7.3.1 -#[cfg_attr(feature = "serde", derive(serde::Deserialize, serde::Serialize))] -#[cfg_attr(feature = "utoipa", derive(utoipa::ToSchema))] -#[derive(Clone, Debug, Eq, PartialEq)] +#[derive(Clone, Copy, Debug, Eq, PartialEq)] #[non_exhaustive] -pub struct WriteDataByIdentifierResponse { +pub struct WriteDataByIdentifierResponse { /// The DID that was written to. - pub identifier: DataIdentifier, + pub identifier: u16, } -impl WriteDataByIdentifierResponse { +impl WriteDataByIdentifierResponse { /// Create a new response echoing the identifier that was written. - pub fn new(identifier: DataIdentifier) -> Self { + #[must_use] + pub const fn new(identifier: u16) -> Self { Self { identifier } } } -impl Encode for WriteDataByIdentifierResponse { +impl Encode for WriteDataByIdentifierResponse { fn encoded_size(&self) -> usize { 2 } fn encode(&self, writer: &mut impl embedded_io::Write) -> Result { - Encode::encode(&self.identifier, writer) + writer + .write_all(&self.identifier.to_be_bytes()) + .map_err(Error::io)?; + Ok(2) } } #[cfg(test)] mod test { use super::*; - use crate::{ProtocolPayloadTx, UDSIdentifier, impl_identifier}; + use crate::test_util::assert_encode_size_agrees; #[test] fn test_write_response_encode() { - #[cfg_attr(feature = "serde", derive(serde::Deserialize, serde::Serialize))] - #[derive(Clone, Copy, Debug, PartialEq)] - pub enum TestIdentifier { - Abracadabra = 0xBEEF, - } - impl_identifier!(TestIdentifier); - impl From for TestIdentifier { - fn from(value: u16) -> Self { - match value { - 0xBEEF => TestIdentifier::Abracadabra, - _ => panic!("Invalid test identifier: {value}"), - } - } - } - impl From for u16 { - fn from(value: TestIdentifier) -> Self { - match value { - TestIdentifier::Abracadabra => 0xBEEF, - } - } - } - - let response = WriteDataByIdentifierResponse::new(TestIdentifier::Abracadabra); + let response = WriteDataByIdentifierResponse::new(0xBEEF); let mut buf = [0u8; 4]; let written = Encode::encode(&response, &mut buf.as_mut_slice()).unwrap(); assert_eq!(written, 2); assert_eq!(buf[0], 0xBE); assert_eq!(buf[1], 0xEF); + assert_encode_size_agrees(&response); } #[test] fn test_write_request_encode() { - let payload = ProtocolPayloadTx::new(UDSIdentifier::ActiveDiagnosticSession, &[0x01]); - let request = WriteDataByIdentifierRequest::new(payload); + // DID 0xF186 + one data byte 0x01 + let payload = [0xF1, 0x86, 0x01]; + let request = WriteDataByIdentifierRequestTx::new(&payload); let mut buf = [0u8; 8]; let written = Encode::encode(&request, &mut buf.as_mut_slice()).unwrap(); assert_eq!(written, 3); + assert_eq!(&buf[..3], &[0xF1, 0x86, 0x01]); + assert_encode_size_agrees(&request); } } From 187dc70849adce8340d2e57d0cf4a0ddd9cf6d12 Mon Sep 17 00:00:00 2001 From: Zach Heylmun Date: Tue, 2 Jun 2026 12:01:03 -0400 Subject: [PATCH 29/58] de-genericize RoutineControl to raw-bytes RoutineControl*Tx types --- src/services/mod.rs | 2 +- src/services/routine_control.rs | 105 ++++++++++++++++++++------------ 2 files changed, 67 insertions(+), 40 deletions(-) diff --git a/src/services/mod.rs b/src/services/mod.rs index a101863..fc5b6ba 100644 --- a/src/services/mod.rs +++ b/src/services/mod.rs @@ -37,7 +37,7 @@ pub use request_file_transfer::{ }; mod routine_control; -pub use routine_control::{RoutineControlRequest, RoutineControlResponse}; +pub use routine_control::{RoutineControlRequestTx, RoutineControlResponseTx}; mod security_access; pub use security_access::{SecurityAccessRequestTx, SecurityAccessResponseTx}; diff --git a/src/services/routine_control.rs b/src/services/routine_control.rs index 57f9b91..81b0be5 100644 --- a/src/services/routine_control.rs +++ b/src/services/routine_control.rs @@ -1,87 +1,114 @@ -//! Routine Control (0x31) Service is used to perform functions on the ECU that are may not be covered by other services. +//! Routine Control (0x31) Service is used to perform functions on the ECU that may not be covered by other services. //! //! It can also be used to check the ECU's health, erase memory, or other custom manufacturer/supplier routines. //! However, some routines may have side effects or require certain preconditions to be met. -use crate::{Encode, Error, Identifier, RoutineControlSubFunction}; +use crate::{Encode, Error, RoutineControlSubFunction}; -/// Used by a client to execute a defined sequence of events and obtain any relevant results -#[cfg_attr(feature = "serde", derive(serde::Deserialize, serde::Serialize))] -#[cfg_attr(feature = "utoipa", derive(utoipa::ToSchema))] -#[derive(Clone, Debug, PartialEq)] +/// Used by a client to execute a defined sequence of events and obtain any relevant results. +/// +/// The payload is the routine identifier (2 bytes, big-endian) followed by any optional +/// routine input parameters, exactly as it appears on the wire after the sub-function byte. +#[derive(Clone, Copy, Debug, Eq, PartialEq)] #[non_exhaustive] -pub struct RoutineControlRequest { +pub struct RoutineControlRequestTx<'d> { /// The routine control operation (start, stop, or request results). pub sub_function: RoutineControlSubFunction, - /// The identifier of the routine to control. - pub routine_id: RoutineIdentifier, - /// Optional payload data for the routine (e.g. input parameters). - pub data: Option, + /// The raw payload bytes: routine identifier followed by optional parameters. + pub raw_payload: &'d [u8], } -impl RoutineControlRequest { - /// Create a new `RoutineControlRequest`. - pub fn new(sub_function: RoutineControlSubFunction, routine_id: RI, data: Option) -> Self { +impl<'d> RoutineControlRequestTx<'d> { + /// Create a new `RoutineControlRequestTx`. + #[must_use] + pub const fn new(sub_function: RoutineControlSubFunction, raw_payload: &'d [u8]) -> Self { Self { sub_function, - routine_id, - data, + raw_payload, } } } -impl Encode for RoutineControlRequest { +impl Encode for RoutineControlRequestTx<'_> { fn encoded_size(&self) -> usize { - 1 + 2 + self.data.as_ref().map_or(0, Encode::encoded_size) + 1 + self.raw_payload.len() } fn encode(&self, writer: &mut impl embedded_io::Write) -> Result { writer .write_all(&[u8::from(self.sub_function)]) .map_err(Error::io)?; - Encode::encode(&self.routine_id, writer)?; - if let Some(payload) = &self.data { - Encode::encode(payload, writer)?; - } + writer.write_all(self.raw_payload).map_err(Error::io)?; Ok(self.encoded_size()) } } -/// `RoutineControlResponse` is a variable length field that can contain the status of the routine -#[cfg_attr(feature = "serde", derive(serde::Deserialize, serde::Serialize))] -#[cfg_attr(feature = "utoipa", derive(utoipa::ToSchema))] -#[derive(Clone, Debug, PartialEq)] +/// `RoutineControlResponseTx` is a variable-length response that can contain routine status. +/// +/// The status record is the routine identifier echo plus any routine-info / status bytes, +/// held as raw bytes. +#[derive(Clone, Copy, Debug, Eq, PartialEq)] #[non_exhaustive] -pub struct RoutineControlResponse { - /// The sub-function echoes the routine control request +pub struct RoutineControlResponseTx<'d> { + /// The sub-function echoed from the routine control request. pub routine_control_type: RoutineControlSubFunction, - - /// Should contain the `routine_info` (u8) and the `routine_status_record` (u8 * n) information. n can be 0 - pub routine_status_record: RoutineInfoStatusRecord, + /// Raw routine status record bytes (routine identifier + routine info + status). + pub raw_status_record: &'d [u8], } -impl RoutineControlResponse { - /// Create a new `RoutineControlResponse`. - pub fn new( +impl<'d> RoutineControlResponseTx<'d> { + /// Create a new `RoutineControlResponseTx`. + #[must_use] + pub const fn new( routine_control_type: RoutineControlSubFunction, - routine_status_record: RSR, + raw_status_record: &'d [u8], ) -> Self { Self { routine_control_type, - routine_status_record, + raw_status_record, } } } -impl Encode for RoutineControlResponse { +impl Encode for RoutineControlResponseTx<'_> { fn encoded_size(&self) -> usize { - 1 + self.routine_status_record.encoded_size() + 1 + self.raw_status_record.len() } fn encode(&self, writer: &mut impl embedded_io::Write) -> Result { writer .write_all(&[u8::from(self.routine_control_type)]) .map_err(Error::io)?; - Encode::encode(&self.routine_status_record, writer)?; + writer + .write_all(self.raw_status_record) + .map_err(Error::io)?; Ok(self.encoded_size()) } } + +#[cfg(test)] +mod test { + use super::*; + use crate::test_util::assert_encode_size_agrees; + + #[test] + fn encode_routine_control_request_tx() { + // RID 0xFF00 (EraseMemory) + 1 parameter byte + let payload = [0xFF, 0x00, 0xAA]; + let req = RoutineControlRequestTx::new(RoutineControlSubFunction::StartRoutine, &payload); + let mut buf = [0u8; 8]; + let written = Encode::encode(&req, &mut buf.as_mut_slice()).unwrap(); + assert_eq!(&buf[..written], &[0x01, 0xFF, 0x00, 0xAA]); + assert_encode_size_agrees(&req); + } + + #[test] + fn encode_routine_control_response_tx() { + let record = [0xFF, 0x00, 0x10]; + let resp = + RoutineControlResponseTx::new(RoutineControlSubFunction::StartRoutine, &record); + let mut buf = [0u8; 8]; + let written = Encode::encode(&resp, &mut buf.as_mut_slice()).unwrap(); + assert_eq!(&buf[..written], &[0x01, 0xFF, 0x00, 0x10]); + assert_encode_size_agrees(&resp); + } +} From 5fa82639d5ef0a01ff8e79dadede5a43b41df232 Mon Sep 17 00:00:00 2001 From: Zach Heylmun Date: Tue, 2 Jun 2026 12:03:46 -0400 Subject: [PATCH 30/58] remove orphaned DiagnosticDefinition trait and UdsSpec --- src/lib.rs | 20 ++------------------ src/traits.rs | 12 ------------ 2 files changed, 2 insertions(+), 30 deletions(-) diff --git a/src/lib.rs b/src/lib.rs index f4dfcae..a3722bb 100644 --- a/src/lib.rs +++ b/src/lib.rs @@ -12,7 +12,7 @@ pub use error::Error; mod test_util; mod traits; -pub use traits::{Decode, DecodeIter, DiagnosticDefinition, Encode, Identifier, RoutineIdentifier}; +pub use traits::{Decode, DecodeIter, Encode, Identifier, RoutineIdentifier}; mod common; pub use common::*; @@ -38,23 +38,7 @@ pub const SUCCESS: u8 = 0x80; /// Signals that the server received the request but needs additional time to process it. pub const PENDING: u8 = 0x78; -/// Basic UDS implementation of the [`DiagnosticDefinition`] trait. -/// -/// This is an example of a simple data spec that can be used with UDS requests and responses. -/// It should **not** be used directly in production code, but rather as a base for more complex data specifiers. -#[cfg_attr(feature = "serde", derive(serde::Deserialize, serde::Serialize))] -#[cfg_attr(feature = "utoipa", derive(utoipa::ToSchema))] -#[derive(Clone, Copy, Debug, Eq, PartialEq)] -pub struct UdsSpec; - -impl<'a> DiagnosticDefinition<'a> for UdsSpec { - type RID = UDSRoutineIdentifier; - type DID = ProtocolIdentifier; - type RoutinePayload = ProtocolRoutinePayloadTx<'a>; - type DiagnosticPayload = ProtocolPayloadTx<'a>; -} - -/// What type of routine control to perform for a [`RoutineControlRequest`]. +/// What type of routine control to perform for a [`RoutineControlRequestTx`]. #[cfg_attr(feature = "serde", derive(serde::Deserialize, serde::Serialize))] #[cfg_attr(feature = "utoipa", derive(utoipa::ToSchema))] #[cfg_attr(feature = "clap", derive(clap::ValueEnum))] diff --git a/src/traits.rs b/src/traits.rs index 0a668a7..f5213f1 100644 --- a/src/traits.rs +++ b/src/traits.rs @@ -140,18 +140,6 @@ where } } -/// Trait for diagnostic definitions that specifies the identifier and payload -/// types used when constructing and parsing UDS requests and responses. -pub trait DiagnosticDefinition<'a> { - /// UDS Data Identifier type. - type DID: Identifier + Clone + core::fmt::Debug + PartialEq + 'static; - /// Payload type for read/write data by identifier etc. - type DiagnosticPayload: Encode + Clone + core::fmt::Debug + PartialEq + 'a; - /// UDS Routine Identifier type. - type RID: RoutineIdentifier + Clone + core::fmt::Debug + PartialEq + 'static; - /// Payload type for routine control requests/responses. - type RoutinePayload: Encode + Clone + core::fmt::Debug + PartialEq + 'a; -} #[cfg(test)] mod tests { From 80d2a8d2780f9b654e11f3d170b8892bcc85886c Mon Sep 17 00:00:00 2001 From: Zach Heylmun Date: Tue, 2 Jun 2026 12:05:44 -0400 Subject: [PATCH 31/58] delete protocol_definitions module (ProtocolIdentifier/PayloadTx) --- src/lib.rs | 2 - src/protocol_definitions.rs | 204 ------------------------------------ 2 files changed, 206 deletions(-) delete mode 100644 src/protocol_definitions.rs diff --git a/src/lib.rs b/src/lib.rs index a3722bb..b8b4c25 100644 --- a/src/lib.rs +++ b/src/lib.rs @@ -17,8 +17,6 @@ pub use traits::{Decode, DecodeIter, Encode, Identifier, RoutineIdentifier}; mod common; pub use common::*; -mod protocol_definitions; -pub use protocol_definitions::{ProtocolIdentifier, ProtocolPayloadTx, ProtocolRoutinePayloadTx}; mod request; pub use request::Request; diff --git a/src/protocol_definitions.rs b/src/protocol_definitions.rs deleted file mode 100644 index d3bca4d..0000000 --- a/src/protocol_definitions.rs +++ /dev/null @@ -1,204 +0,0 @@ -use crate::{ - Decode, DecodeIter, Encode, Error, UDSIdentifier, UDSRoutineIdentifier, impl_identifier, -}; -use core::ops::Deref; - -/// Protocol Identifier provides an implementation of Diagnostics Identifiers that only supports Diagnostic Identifiers defined by UDS -#[cfg_attr(feature = "serde", derive(serde::Deserialize, serde::Serialize))] -#[cfg_attr(feature = "utoipa", derive(utoipa::ToSchema))] -#[derive(Clone, Copy, Debug, Eq, PartialEq)] -pub struct ProtocolIdentifier { - identifier: UDSIdentifier, -} -impl_identifier!(ProtocolIdentifier); - -impl ProtocolIdentifier { - /// Wrap a [`UDSIdentifier`] in a `ProtocolIdentifier`. - #[must_use] - pub fn new(identifier: UDSIdentifier) -> Self { - ProtocolIdentifier { identifier } - } -} - -impl TryFrom for ProtocolIdentifier { - type Error = Error; - fn try_from(value: u16) -> Result { - Ok(Self { - identifier: UDSIdentifier::try_from(value)?, - }) - } -} - -impl From for u16 { - fn from(value: ProtocolIdentifier) -> Self { - u16::from(value.identifier) - } -} - -impl Deref for ProtocolIdentifier { - type Target = UDSIdentifier; - fn deref(&self) -> &UDSIdentifier { - &self.identifier - } -} - -/// Zero-alloc protocol payload. Borrows the raw payload bytes. -#[derive(Clone, Copy, Eq, PartialEq)] -pub struct ProtocolPayloadTx<'d> { - /// The UDS data identifier this payload belongs to. - pub identifier: UDSIdentifier, - /// The raw payload bytes following the identifier. - pub payload: &'d [u8], -} - -impl<'d> ProtocolPayloadTx<'d> { - /// Creates a new `ProtocolPayloadTx`. - #[must_use] - pub const fn new(identifier: UDSIdentifier, payload: &'d [u8]) -> Self { - Self { - identifier, - payload, - } - } -} - -impl Encode for ProtocolPayloadTx<'_> { - fn encoded_size(&self) -> usize { - 2 + self.payload.len() - } - - fn encode(&self, writer: &mut impl embedded_io::Write) -> Result { - Encode::encode(&self.identifier, writer)?; - writer.write_all(self.payload).map_err(Error::io)?; - Ok(self.encoded_size()) - } -} - -impl<'a> Decode<'a> for ProtocolPayloadTx<'a> { - fn decode(buf: &'a [u8]) -> Result<(Self, &'a [u8]), Error> { - if buf.len() < 2 { - return Err(Error::IncorrectMessageLengthOrInvalidFormat); - } - let (identifier, rest) = ::decode(buf)?; - // Consumes all remaining bytes as payload - Ok(( - Self { - identifier, - payload: rest, - }, - &[], - )) - } -} - -impl<'a> DecodeIter<'a> for ProtocolPayloadTx<'a> { - fn decode_next(buf: &'a [u8]) -> Result, Error> { - if buf.is_empty() { - return Ok(None); - } - Decode::decode(buf).map(Some) - } -} - -impl core::fmt::Debug for ProtocolPayloadTx<'_> { - fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result { - write!(f, "{} =>", self.identifier)?; - for b in self.payload { - write!(f, " {b:02X}")?; - } - Ok(()) - } -} - -/// Zero-alloc routine payload. Borrows the raw payload bytes. -#[derive(Clone, Copy, Eq, PartialEq)] -pub struct ProtocolRoutinePayloadTx<'d> { - /// The routine identifier this payload belongs to. - pub identifier: UDSRoutineIdentifier, - /// The raw payload bytes following the identifier. - pub payload: &'d [u8], -} - -impl<'d> ProtocolRoutinePayloadTx<'d> { - /// Creates a new `ProtocolRoutinePayloadTx`. - #[must_use] - pub const fn new(identifier: UDSRoutineIdentifier, payload: &'d [u8]) -> Self { - Self { - identifier, - payload, - } - } -} - -impl Encode for ProtocolRoutinePayloadTx<'_> { - /// Size of the raw payload only -- the identifier is written by the request. - fn encoded_size(&self) -> usize { - self.payload.len() - } - - fn encode(&self, writer: &mut impl embedded_io::Write) -> Result { - writer.write_all(self.payload).map_err(Error::io)?; - Ok(self.payload.len()) - } -} - -impl<'a> Decode<'a> for ProtocolRoutinePayloadTx<'a> { - fn decode(buf: &'a [u8]) -> Result<(Self, &'a [u8]), Error> { - if buf.len() < 2 { - return Err(Error::IncorrectMessageLengthOrInvalidFormat); - } - let raw = u16::from_be_bytes([buf[0], buf[1]]); - let identifier = UDSRoutineIdentifier::from(raw); - Ok(( - Self { - identifier, - payload: &buf[2..], - }, - &[], - )) - } -} - -impl<'a> DecodeIter<'a> for ProtocolRoutinePayloadTx<'a> { - fn decode_next(buf: &'a [u8]) -> Result, Error> { - if buf.is_empty() { - return Ok(None); - } - Decode::decode(buf).map(Some) - } -} - -impl core::fmt::Debug for ProtocolRoutinePayloadTx<'_> { - fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result { - write!(f, "{:?} =>", self.identifier)?; - for b in self.payload { - write!(f, " {b:02X}")?; - } - Ok(()) - } -} - -#[cfg(test)] -mod tests { - - use super::*; - - #[test] - fn test_construction_and_debug_format() { - let payload = ProtocolPayloadTx::new(UDSIdentifier::ActiveDiagnosticSession, &[0x01]); - assert_eq!(format!("{payload:?}"), "0xF186 => 01"); - let mut buf = [0u8; 8]; - let written = Encode::encode(&payload, &mut buf.as_mut_slice()).unwrap(); - assert_eq!(written, 3); - } - - #[test] - fn test_encode_and_decode() { - let payload = ProtocolPayloadTx::new(UDSIdentifier::ActiveDiagnosticSession, &[0x03]); - let mut buf = [0u8; 8]; - let written = Encode::encode(&payload, &mut buf.as_mut_slice()).unwrap(); - assert_eq!(written, 3); - let (decoded, _) = ProtocolPayloadTx::decode(&buf[..written]).unwrap(); - assert_eq!(payload, decoded); - } -} From bde56e1b8dec73a658a37775a4c0cbbb5d86c658 Mon Sep 17 00:00:00 2001 From: Zach Heylmun Date: Tue, 2 Jun 2026 12:08:52 -0400 Subject: [PATCH 32/58] remove Identifier machinery; add direct codec to UDS identifiers --- src/common/diagnostic_identifier.rs | 80 +++++++++++++++- src/lib.rs | 3 +- src/request.rs | 14 +-- src/response.rs | 6 +- src/services/routine_control.rs | 3 +- src/traits.rs | 142 ---------------------------- 6 files changed, 86 insertions(+), 162 deletions(-) diff --git a/src/common/diagnostic_identifier.rs b/src/common/diagnostic_identifier.rs index 0f179f1..b8bab81 100644 --- a/src/common/diagnostic_identifier.rs +++ b/src/common/diagnostic_identifier.rs @@ -1,5 +1,5 @@ //! DIDs are used to identify the data that is requested or sent in a diagnostic service. -use crate::{Error, impl_identifier, traits::RoutineIdentifier}; +use crate::{Decode, Encode, Error}; /// C.1 DID - Diagnostic Data Identifier specified in ISO 14229-1 /// @@ -94,7 +94,6 @@ pub enum UDSIdentifier { /// Reserved for ISO 15765-5 (`0xFF01`). ReservedForISO15765_5 = 0xFF01, } -impl_identifier!(UDSIdentifier); impl TryFrom for UDSIdentifier { type Error = Error; @@ -257,7 +256,6 @@ pub enum UDSRoutineIdentifier { /// 0xFF01 CheckProgrammingDependencies = 0xFF01, } -impl_identifier!(UDSRoutineIdentifier); /// We know all values for the Routine Identifier, so we can implement `From` for `UDSRoutineIdentifier` impl From for UDSRoutineIdentifier { @@ -295,4 +293,78 @@ impl From for u16 { } } -impl RoutineIdentifier for UDSRoutineIdentifier {} +impl Encode for UDSIdentifier { + fn encoded_size(&self) -> usize { + 2 + } + + fn encode(&self, writer: &mut impl embedded_io::Write) -> Result { + writer + .write_all(&u16::from(*self).to_be_bytes()) + .map_err(Error::io)?; + Ok(2) + } +} + +impl<'a> Decode<'a> for UDSIdentifier { + fn decode(buf: &'a [u8]) -> Result<(Self, &'a [u8]), Error> { + if buf.len() < 2 { + return Err(Error::IncorrectMessageLengthOrInvalidFormat); + } + let raw = u16::from_be_bytes([buf[0], buf[1]]); + Ok((Self::try_from(raw)?, &buf[2..])) + } +} + +impl Encode for UDSRoutineIdentifier { + fn encoded_size(&self) -> usize { + 2 + } + + fn encode(&self, writer: &mut impl embedded_io::Write) -> Result { + writer + .write_all(&u16::from(*self).to_be_bytes()) + .map_err(Error::io)?; + Ok(2) + } +} + +impl<'a> Decode<'a> for UDSRoutineIdentifier { + fn decode(buf: &'a [u8]) -> Result<(Self, &'a [u8]), Error> { + if buf.len() < 2 { + return Err(Error::IncorrectMessageLengthOrInvalidFormat); + } + let raw = u16::from_be_bytes([buf[0], buf[1]]); + Ok((Self::from(raw), &buf[2..])) + } +} + +#[cfg(test)] +mod codec_tests { + use super::*; + use crate::test_util::assert_encode_size_agrees; + + #[test] + fn uds_identifier_roundtrip() { + let id = UDSIdentifier::ActiveDiagnosticSession; + let mut buf = [0u8; 2]; + Encode::encode(&id, &mut buf.as_mut_slice()).unwrap(); + assert_eq!(buf, [0xF1, 0x86]); + let (decoded, rest) = ::decode(&buf).unwrap(); + assert_eq!(decoded, id); + assert!(rest.is_empty()); + assert_encode_size_agrees(&id); + } + + #[test] + fn uds_routine_identifier_roundtrip() { + let id = UDSRoutineIdentifier::EraseMemory; + let mut buf = [0u8; 2]; + Encode::encode(&id, &mut buf.as_mut_slice()).unwrap(); + assert_eq!(buf, [0xFF, 0x00]); + let (decoded, rest) = ::decode(&buf).unwrap(); + assert_eq!(decoded, id); + assert!(rest.is_empty()); + assert_encode_size_agrees(&id); + } +} diff --git a/src/lib.rs b/src/lib.rs index b8b4c25..70a4be6 100644 --- a/src/lib.rs +++ b/src/lib.rs @@ -12,12 +12,11 @@ pub use error::Error; mod test_util; mod traits; -pub use traits::{Decode, DecodeIter, Encode, Identifier, RoutineIdentifier}; +pub use traits::{Decode, DecodeIter, Encode}; mod common; pub use common::*; - mod request; pub use request::Request; diff --git a/src/request.rs b/src/request.rs index 495343e..74ccf30 100644 --- a/src/request.rs +++ b/src/request.rs @@ -64,11 +64,9 @@ impl<'a> Decode<'a> for Request<'a> { let payload = &buf[1..]; let request = match service { - UdsServiceType::ClearDiagnosticInfo => { - Self::ClearDiagnosticInfo(::decode_exact( - payload, - )?) - } + UdsServiceType::ClearDiagnosticInfo => Self::ClearDiagnosticInfo( + ::decode_exact(payload)?, + ), UdsServiceType::CommunicationControl => Self::CommunicationControl( ::decode_exact(payload)?, ), @@ -229,12 +227,10 @@ mod tests { #[test] fn suppression_forwards_to_inner_request() { - let suppressed = - Request::EcuReset(EcuResetRequest::new(true, ResetType::HardReset)); + let suppressed = Request::EcuReset(EcuResetRequest::new(true, ResetType::HardReset)); assert!(suppressed.is_positive_response_suppressed()); - let not_suppressed = - Request::EcuReset(EcuResetRequest::new(false, ResetType::HardReset)); + let not_suppressed = Request::EcuReset(EcuResetRequest::new(false, ResetType::HardReset)); assert!(!not_suppressed.is_positive_response_suppressed()); } } diff --git a/src/response.rs b/src/response.rs index 798694e..2d4cc11 100644 --- a/src/response.rs +++ b/src/response.rs @@ -80,9 +80,9 @@ impl<'a> Decode<'a> for Response<'a> { UdsServiceType::ReadDTCInfo => { Self::ReadDTCInfo(::decode_exact(payload)?) } - UdsServiceType::RequestDownload => { - Self::RequestDownload(::decode_exact(payload)?) - } + UdsServiceType::RequestDownload => Self::RequestDownload( + ::decode_exact(payload)?, + ), UdsServiceType::RequestFileTransfer => Self::RequestFileTransfer( ::decode_exact(payload)?, ), diff --git a/src/services/routine_control.rs b/src/services/routine_control.rs index 81b0be5..dca5ca9 100644 --- a/src/services/routine_control.rs +++ b/src/services/routine_control.rs @@ -104,8 +104,7 @@ mod test { #[test] fn encode_routine_control_response_tx() { let record = [0xFF, 0x00, 0x10]; - let resp = - RoutineControlResponseTx::new(RoutineControlSubFunction::StartRoutine, &record); + let resp = RoutineControlResponseTx::new(RoutineControlSubFunction::StartRoutine, &record); let mut buf = [0u8; 8]; let written = Encode::encode(&resp, &mut buf.as_mut_slice()).unwrap(); assert_eq!(&buf[..written], &[0x01, 0xFF, 0x00, 0x10]); diff --git a/src/traits.rs b/src/traits.rs index f5213f1..9e77039 100644 --- a/src/traits.rs +++ b/src/traits.rs @@ -66,145 +66,3 @@ pub trait DecodeIter<'a>: Sized { /// Returns an error if the buffer contains a partial or invalid item. fn decode_next(buf: &'a [u8]) -> Result, Error>; } - -/// Trait for types that can be used as identifiers (ie Data Identifiers and Routine Identifiers) -/// -/// Use the [`impl_identifier!`](crate::impl_identifier) macro to implement this trait for your types. -pub trait Identifier: TryFrom + Into + Clone + Copy {} - -/// Implement the [`Identifier`] trait for a type. -/// -/// The type must already implement `TryFrom`, `Into`, `Clone`, and `Copy`. -/// -/// # Example -/// ```rust,ignore -/// impl_identifier!(MyIdentifierEnum); -/// ``` -#[macro_export] -macro_rules! impl_identifier { - ($($t:ty),+ $(,)?) => { - $(impl $crate::Identifier for $t {})+ - }; -} - -/// Marker subtrait of [`Identifier`] to distinguish routine identifiers from data identifiers. -pub trait RoutineIdentifier: Identifier {} - -/// Blanket implementation of [`Encode`] for types that implement [`Identifier`] -impl Encode for T -where - T: Identifier, -{ - fn encoded_size(&self) -> usize { - 2 - } - - fn encode(&self, writer: &mut impl embedded_io::Write) -> Result { - writer - .write_all(&Into::::into(*self).to_be_bytes()) - .map_err(Error::io)?; - Ok(2) - } -} - -/// Blanket implementation of [`Decode`] for types that implement [`Identifier`] -impl<'a, T> Decode<'a> for T -where - T: Identifier, -{ - fn decode(buf: &'a [u8]) -> Result<(Self, &'a [u8]), Error> { - if buf.len() < 2 { - return Err(Error::IncorrectMessageLengthOrInvalidFormat); - } - let raw = u16::from_be_bytes([buf[0], buf[1]]); - match Self::try_from(raw) { - Ok(identifier) => Ok((identifier, &buf[2..])), - Err(_) => Err(Error::InvalidDiagnosticIdentifier(raw)), - } - } -} - -/// Blanket implementation of [`DecodeIter`] for types that implement [`Identifier`] -impl<'a, T> DecodeIter<'a> for T -where - T: Identifier, -{ - fn decode_next(buf: &'a [u8]) -> Result, Error> { - if buf.is_empty() { - return Ok(None); - } - if buf.len() < 2 { - return Err(Error::IncorrectMessageLengthOrInvalidFormat); - } - Decode::decode(buf).map(Some) - } -} - - -#[cfg(test)] -mod tests { - use super::*; - use crate::UDSIdentifier; - - #[cfg_attr(feature = "serde", derive(serde::Deserialize, serde::Serialize))] - #[derive(Clone, Copy, Debug, Eq, PartialEq)] - #[repr(u16)] - pub enum MyIdentifier { - Identifier1 = 0x0101, - Identifier2 = 0x0202, - Identifier3 = 0x0303, - UDSIdentifier(UDSIdentifier), - } - impl_identifier!(MyIdentifier); - - impl From for MyIdentifier { - fn from(value: u16) -> Self { - match value { - 0x0101 => MyIdentifier::Identifier1, - 0x0202 => MyIdentifier::Identifier2, - 0x0303 => MyIdentifier::Identifier3, - _ => MyIdentifier::UDSIdentifier(UDSIdentifier::try_from(value).unwrap()), - } - } - } - - impl From for u16 { - fn from(value: MyIdentifier) -> Self { - match value { - MyIdentifier::Identifier1 => 0x0101, - MyIdentifier::Identifier2 => 0x0202, - MyIdentifier::Identifier3 => 0x0303, - MyIdentifier::UDSIdentifier(identifier) => u16::from(identifier), - } - } - } - - #[test] - fn test_identifier_encode_decode() { - let identifier = MyIdentifier::Identifier1; - let mut buf = [0u8; 2]; - Encode::encode(&identifier, &mut buf.as_mut_slice()).unwrap(); - let (decoded, rest) = ::decode(&buf).unwrap(); - assert_eq!(identifier, decoded); - assert!(rest.is_empty()); - } - - #[test] - #[allow(clippy::match_same_arms)] - fn test_identifier_decode_iter() { - let data = [0x01u8, 0x01, 0x02, 0x02, 0x03, 0x03]; - let mut remaining = &data[..]; - let mut count = 0; - while let Some((id, rest)) = MyIdentifier::decode_next(remaining).unwrap() { - remaining = rest; - count += 1; - match id { - MyIdentifier::Identifier1 => assert_eq!(count, 1), - MyIdentifier::Identifier2 => assert_eq!(count, 2), - MyIdentifier::Identifier3 => assert_eq!(count, 3), - MyIdentifier::UDSIdentifier(_) => panic!("Unexpected"), - } - } - assert_eq!(count, 3); - } -} From 4b8a95cd555dab402483713e1eaa08252b74922c Mon Sep 17 00:00:00 2001 From: Zach Heylmun Date: Tue, 2 Jun 2026 12:41:27 -0400 Subject: [PATCH 33/58] move is_positive_response_suppressed off the Encode trait --- src/request.rs | 19 +++++++++++-------- src/services/control_dtc_settings.rs | 10 ++++++---- src/services/diagnostic_session_control.rs | 4 ---- src/services/ecu_reset.rs | 4 ---- src/services/security_access.rs | 4 ---- src/services/tester_present.rs | 4 ---- src/traits.rs | 5 ----- 7 files changed, 17 insertions(+), 33 deletions(-) diff --git a/src/request.rs b/src/request.rs index 74ccf30..3bcd406 100644 --- a/src/request.rs +++ b/src/request.rs @@ -168,20 +168,23 @@ impl Encode for Request<'_> { }; Ok(1 + payload) } +} - fn is_positive_response_suppressed(&self) -> bool { +impl Request<'_> { + /// Whether the positive response for this request is suppressed (SPRMIB). + #[must_use] + pub fn is_positive_response_suppressed(&self) -> bool { match self { - Self::ControlDTCSettings(req) => req.is_positive_response_suppressed(), - Self::DiagnosticSessionControl(req) => req.is_positive_response_suppressed(), - Self::EcuReset(req) => req.is_positive_response_suppressed(), - Self::SecurityAccess(req) => req.is_positive_response_suppressed(), - Self::TesterPresent(req) => req.is_positive_response_suppressed(), + Self::CommunicationControl(req) => req.suppress_positive_response(), + Self::ControlDTCSettings(req) => req.suppress_positive_response(), + Self::DiagnosticSessionControl(req) => req.suppress_positive_response(), + Self::EcuReset(req) => req.suppress_positive_response(), + Self::SecurityAccess(req) => req.suppress_positive_response(), + Self::TesterPresent(req) => req.suppress_positive_response(), _ => false, } } -} -impl Request<'_> { /// Returns the [`UdsServiceType`] corresponding to this request variant. #[must_use] pub fn service(&self) -> UdsServiceType { diff --git a/src/services/control_dtc_settings.rs b/src/services/control_dtc_settings.rs index db4b165..b37c870 100644 --- a/src/services/control_dtc_settings.rs +++ b/src/services/control_dtc_settings.rs @@ -22,6 +22,12 @@ impl ControlDTCSettingsRequest { suppress_response, } } + + /// Whether the server should suppress the positive response (SPRMIB). + #[must_use] + pub const fn suppress_positive_response(&self) -> bool { + self.suppress_response + } } impl Encode for ControlDTCSettingsRequest { @@ -35,10 +41,6 @@ impl Encode for ControlDTCSettingsRequest { writer.write_all(&[request_byte]).map_err(Error::io)?; Ok(1) } - - fn is_positive_response_suppressed(&self) -> bool { - self.suppress_response - } } impl<'a> Decode<'a> for ControlDTCSettingsRequest { diff --git a/src/services/diagnostic_session_control.rs b/src/services/diagnostic_session_control.rs index 8ed8b4c..3e91c3b 100644 --- a/src/services/diagnostic_session_control.rs +++ b/src/services/diagnostic_session_control.rs @@ -69,10 +69,6 @@ impl Encode for DiagnosticSessionControlRequest { .map_err(Error::io)?; Ok(1) } - - fn is_positive_response_suppressed(&self) -> bool { - self.suppress_positive_response() - } } impl<'a> Decode<'a> for DiagnosticSessionControlRequest { diff --git a/src/services/ecu_reset.rs b/src/services/ecu_reset.rs index 5a90f00..ee3b0ef 100644 --- a/src/services/ecu_reset.rs +++ b/src/services/ecu_reset.rs @@ -55,10 +55,6 @@ impl Encode for EcuResetRequest { .map_err(Error::io)?; Ok(1) } - - fn is_positive_response_suppressed(&self) -> bool { - self.suppress_positive_response() - } } impl<'a> Decode<'a> for EcuResetRequest { diff --git a/src/services/security_access.rs b/src/services/security_access.rs index 39e4e02..5fc3a70 100644 --- a/src/services/security_access.rs +++ b/src/services/security_access.rs @@ -93,10 +93,6 @@ impl Encode for SecurityAccessRequestTx<'_> { writer.write_all(self.request_data).map_err(Error::io)?; Ok(self.encoded_size()) } - - fn is_positive_response_suppressed(&self) -> bool { - self.suppress_positive_response() - } } impl<'a> Decode<'a> for SecurityAccessRequestTx<'a> { diff --git a/src/services/tester_present.rs b/src/services/tester_present.rs index 8c15db6..8968d87 100644 --- a/src/services/tester_present.rs +++ b/src/services/tester_present.rs @@ -101,10 +101,6 @@ impl Encode for TesterPresentRequest { .map_err(Error::io)?; Ok(1) } - - fn is_positive_response_suppressed(&self) -> bool { - self.suppress_positive_response() - } } impl<'a> Decode<'a> for TesterPresentRequest { diff --git a/src/traits.rs b/src/traits.rs index 9e77039..2f78123 100644 --- a/src/traits.rs +++ b/src/traits.rs @@ -14,11 +14,6 @@ pub trait Encode { /// # Errors /// Returns [`Error::IoError`] if the writer fails. fn encode(&self, writer: &mut impl embedded_io::Write) -> Result; - - /// Whether the positive response for this message is suppressed (SPRMIB). - fn is_positive_response_suppressed(&self) -> bool { - false - } } /// RX-side trait: zero-copy decode from a byte slice. From bdfd5c21b743eb0d20ddc54c60c604a8de60b780 Mon Sep 17 00:00:00 2001 From: Zach Heylmun Date: Tue, 2 Jun 2026 12:45:51 -0400 Subject: [PATCH 34/58] add symmetric Other escape hatch; drop UdsResponse + ServiceNotImplemented --- src/error.rs | 3 --- src/lib.rs | 2 +- src/request.rs | 40 ++++++++++++++++++++++++++++++++- src/response.rs | 59 ++++++++++++++++++++++++++++++++----------------- 4 files changed, 79 insertions(+), 25 deletions(-) diff --git a/src/error.rs b/src/error.rs index a357289..46b67ef 100644 --- a/src/error.rs +++ b/src/error.rs @@ -61,9 +61,6 @@ pub enum Error { /// The value is reserved for legislative use and must not be used. #[error("Reserved for legislative use: {0}")] ReservedForLegislativeUse(u8), - /// The service type is not yet implemented in this crate. - #[error("UDS service not implemented: {0:?}")] - ServiceNotImplemented(crate::UdsServiceType), } impl Error { diff --git a/src/lib.rs b/src/lib.rs index 70a4be6..6fdd3e4 100644 --- a/src/lib.rs +++ b/src/lib.rs @@ -21,7 +21,7 @@ mod request; pub use request::Request; mod response; -pub use response::{Response, UdsResponse}; +pub use response::Response; mod service; pub use service::UdsServiceType; diff --git a/src/request.rs b/src/request.rs index 3bcd406..533ffa0 100644 --- a/src/request.rs +++ b/src/request.rs @@ -53,6 +53,17 @@ pub enum Request<'a> { TransferData(TransferDataRequestTx<'a>), /// Write data by identifier request. Raw DID + payload bytes. WriteDataByIdentifier(&'a [u8]), + /// A known-but-unmodeled (or unrecognized) service. Carries the service type and + /// the raw payload bytes following the service identifier, for pass-through. + /// + /// Re-encoding is lossless for any service byte in the ISO 14229-1 table; a byte + /// that maps to [`UdsServiceType::UnsupportedDiagnosticService`] re-encodes as `0x7F`. + Other { + /// The service this frame addresses. + service: UdsServiceType, + /// Raw payload bytes after the service byte. + data: &'a [u8], + }, } impl<'a> Decode<'a> for Request<'a> { @@ -107,7 +118,10 @@ impl<'a> Decode<'a> for Request<'a> { Self::TransferData(::decode_exact(payload)?) } UdsServiceType::WriteDataByIdentifier => Self::WriteDataByIdentifier(payload), - _ => return Err(Error::ServiceNotImplemented(service)), + _ => Self::Other { + service, + data: payload, + }, }; Ok((request, &[])) } @@ -127,6 +141,7 @@ impl Encode for Request<'_> { Self::RequestDownload(req) => req.encoded_size(), Self::RequestFileTransfer(req) => req.encoded_size(), Self::RequestTransferExit => 0, + Self::Other { data, .. } => data.len(), Self::RoutineControl { raw_payload, .. } => 1 + raw_payload.len(), Self::SecurityAccess(req) => req.encoded_size(), Self::TesterPresent(req) => req.encoded_size(), @@ -154,6 +169,10 @@ impl Encode for Request<'_> { Self::RequestDownload(req) => req.encode(writer)?, Self::RequestFileTransfer(req) => req.encode(writer)?, Self::RequestTransferExit => 0, + Self::Other { data, .. } => { + writer.write_all(data).map_err(Error::io)?; + data.len() + } Self::RoutineControl { sub_function, raw_payload, @@ -204,6 +223,7 @@ impl Request<'_> { Self::TesterPresent(_) => UdsServiceType::TesterPresent, Self::TransferData(_) => UdsServiceType::TransferData, Self::WriteDataByIdentifier(_) => UdsServiceType::WriteDataByIdentifier, + Self::Other { service, .. } => *service, } } } @@ -236,4 +256,22 @@ mod tests { let not_suppressed = Request::EcuReset(EcuResetRequest::new(false, ResetType::HardReset)); assert!(!not_suppressed.is_positive_response_suppressed()); } + + #[test] + fn unmodeled_service_decodes_to_other() { + // 0x23 = ReadMemoryByAddress, enumerated but not modeled. + let frame = [0x23, 0xAA, 0xBB]; + let (req, rest) = Request::decode(&frame).unwrap(); + assert!(rest.is_empty()); + match req { + Request::Other { service, data } => { + assert_eq!(service, UdsServiceType::ReadMemoryByAddress); + assert_eq!(data, &[0xAA, 0xBB]); + } + other => panic!("expected Other, got {other:?}"), + } + let mut buf = [0u8; 8]; + let written = Encode::encode(&req, &mut buf.as_mut_slice()).unwrap(); + assert_eq!(&buf[..written], &frame); + } } diff --git a/src/response.rs b/src/response.rs index 2d4cc11..880f9d4 100644 --- a/src/response.rs +++ b/src/response.rs @@ -49,6 +49,17 @@ pub enum Response<'a> { TransferData(TransferDataResponseTx<'a>), /// Positive response to `WriteDataByIdentifier`. Contains the echoed DID bytes. WriteDataByIdentifier(&'a [u8]), + /// A known-but-unmodeled (or unrecognized) service response. Carries the service + /// type and the raw payload bytes following the service identifier. + /// + /// Re-encoding is lossless for any service byte in the ISO 14229-1 table; a byte + /// that maps to [`UdsServiceType::UnsupportedDiagnosticService`] re-encodes as `0x7F`. + Other { + /// The service this response addresses. + service: UdsServiceType, + /// Raw payload bytes after the service byte. + data: &'a [u8], + }, } impl<'a> Decode<'a> for Response<'a> { @@ -106,7 +117,10 @@ impl<'a> Decode<'a> for Response<'a> { Self::TransferData(::decode_exact(payload)?) } UdsServiceType::WriteDataByIdentifier => Self::WriteDataByIdentifier(payload), - _ => return Err(Error::ServiceNotImplemented(service)), + _ => Self::Other { + service, + data: payload, + }, }; Ok((response, &[])) } @@ -140,6 +154,7 @@ impl Response<'_> { Self::WriteDataByIdentifier(_) => { UdsServiceType::WriteDataByIdentifier.response_to_byte() } + Self::Other { service, .. } => service.response_to_byte(), } } } @@ -148,6 +163,7 @@ impl Encode for Response<'_> { fn encoded_size(&self) -> usize { let payload = match self { Self::ClearDiagnosticInfo | Self::RequestTransferExit => 0, + Self::Other { data, .. } => data.len(), Self::CommunicationControl(resp) => resp.encoded_size(), Self::ControlDTCSettings(resp) => resp.encoded_size(), Self::DiagnosticSessionControl(resp) => resp.encoded_size(), @@ -198,31 +214,34 @@ impl Encode for Response<'_> { Self::SecurityAccess(resp) => resp.encode(writer)?, Self::TesterPresent(resp) => resp.encode(writer)?, Self::TransferData(resp) => resp.encode(writer)?, + Self::Other { data, .. } => { + writer.write_all(data).map_err(Error::io)?; + data.len() + } }; Ok(1 + payload) } } -/// Zero-copy raw RX response. Borrows from the wire buffer. -#[derive(Clone, Debug)] -pub struct UdsResponse<'a> { - /// The service this response corresponds to. - pub service: UdsServiceType, - /// The raw payload bytes following the service identifier. - pub data: &'a [u8], -} +#[cfg(test)] +mod tests { + use super::*; -impl<'a> Decode<'a> for UdsResponse<'a> { - fn decode(buf: &'a [u8]) -> Result<(Self, &'a [u8]), Error> { - if buf.is_empty() { - return Err(Error::InsufficientData(1)); + #[test] + fn unmodeled_response_decodes_to_other() { + // 0x63 = ReadMemoryByAddress positive response, not modeled. + let frame = [0x63, 0x01, 0x02]; + let (resp, rest) = Response::decode(&frame).unwrap(); + assert!(rest.is_empty()); + match resp { + Response::Other { service, data } => { + assert_eq!(service, UdsServiceType::ReadMemoryByAddress); + assert_eq!(data, &[0x01, 0x02]); + } + other => panic!("expected Other, got {other:?}"), } - Ok(( - Self { - service: UdsServiceType::response_from_byte(buf[0]), - data: &buf[1..], - }, - &[], - )) + let mut buf = [0u8; 8]; + let written = Encode::encode(&resp, &mut buf.as_mut_slice()).unwrap(); + assert_eq!(&buf[..written], &frame); } } From 7ab039a6c74b5140903cbf017a5766381bdd8667 Mon Sep 17 00:00:00 2001 From: Zach Heylmun Date: Tue, 2 Jun 2026 12:57:17 -0400 Subject: [PATCH 35/58] document the Decode remainder / borrow contract --- src/traits.rs | 12 +++++++++--- 1 file changed, 9 insertions(+), 3 deletions(-) diff --git a/src/traits.rs b/src/traits.rs index 2f78123..b666ad3 100644 --- a/src/traits.rs +++ b/src/traits.rs @@ -18,9 +18,15 @@ pub trait Encode { /// RX-side trait: zero-copy decode from a byte slice. /// -/// Implementations borrow directly from the input buffer where possible. -/// Returns the decoded value together with the unconsumed remainder of the -/// buffer. +/// Implementations borrow directly from the input buffer where possible. The decoded +/// value points into `buf` and is valid only as long as `buf` lives — for C developers +/// new to Rust, think of it like a `struct` overlaid on a `char buf[]`. Copy out any +/// fields you need to retain beyond the buffer's lifetime. +/// +/// [`decode`](Self::decode) returns the value together with the unconsumed remainder of +/// the buffer, so leaf and sequence decoders can be composed. Frame-level decoders +/// (`Request`, `Response`) consume the whole buffer and return an empty remainder; use +/// [`decode_exact`](Self::decode_exact) when a buffer must contain exactly one value. pub trait Decode<'a>: Sized { /// Decode from `buf`, returning `(value, remaining_bytes)`. /// From b6bee21eeb4992c032e3e67c9ac92b816352eebc Mon Sep 17 00:00:00 2001 From: Zach Heylmun Date: Tue, 2 Jun 2026 13:00:43 -0400 Subject: [PATCH 36/58] document runtime-agnostic integration model and borrow semantics --- README.md | 37 +++++++++++++++++++++++++++++++++++++ 1 file changed, 37 insertions(+) diff --git a/README.md b/README.md index 5e8ee2f..38ba8d5 100644 --- a/README.md +++ b/README.md @@ -41,3 +41,40 @@ It is based on the ISO 14229-1:2020 standard. | ControlDTCSetting | 0x85 | 0xC5 | ✓ | | ResponseOnEvent | 0x86 | 0xC6 | | | LinkControl | 0x87 | 0xC7 | | + +## Integration + +`uds_protocol` is a synchronous, allocation-free codec. It owns no sockets, buffers, or +async runtime. To use it over any transport (DoIP, UDSonIP, ISO-TP, …): + +- **Decode** an inbound frame from the `&[u8]` you received. +- **Encode** an outbound frame into any `embedded_io::Write` (or a caller-owned buffer + sized with `encoded_size()`). + +Drive the I/O loop from your own sync or async layer — the crate never blocks or awaits. + +### Encode (build a request) + +```rust +use uds_protocol::{Encode, TesterPresentRequest}; + +let req = TesterPresentRequest::new(false); +let mut buf = [0u8; 8]; +let mut writer = buf.as_mut_slice(); +let written = Encode::encode(&req, &mut writer).unwrap(); +// `buf[..written]` is the wire frame, ready to hand to your transport. +``` + +### Decode (parse a response) + +```rust +use uds_protocol::{Decode, Response}; + +// `frame` is the &[u8] your transport handed you. +let frame = [0x7E, 0x00]; +let (response, _rest) = Response::decode(&frame).unwrap(); +``` + +The decoded value **borrows** from `frame`: it points into that buffer (like a `struct` +overlaid on a `char buf[]`) and is valid only while `frame` lives. Copy out any fields +you need to keep before the buffer is reused. From c2f22b3ae9d6d72b1cafd92af26bd2dcfb4e206c Mon Sep 17 00:00:00 2001 From: Zach Heylmun Date: Tue, 2 Jun 2026 13:05:42 -0400 Subject: [PATCH 37/58] assert encode/encoded_size agreement across all services --- src/services/clear_dtc_information.rs | 3 ++- src/services/communication_control.rs | 7 +++++-- src/services/control_dtc_settings.rs | 6 ++++-- src/services/diagnostic_session_control.rs | 6 ++++-- src/services/ecu_reset.rs | 6 ++++-- src/services/negative_response.rs | 15 +++++++++++++++ src/services/request_download.rs | 10 +++++++++- src/services/request_file_transfer.rs | 14 ++++++++++++++ src/services/security_access.rs | 6 ++++-- src/services/tester_present.rs | 4 +++- src/services/transfer_data.rs | 6 ++++-- 11 files changed, 68 insertions(+), 15 deletions(-) diff --git a/src/services/clear_dtc_information.rs b/src/services/clear_dtc_information.rs index b5f9780..ee2063d 100644 --- a/src/services/clear_dtc_information.rs +++ b/src/services/clear_dtc_information.rs @@ -82,7 +82,7 @@ impl<'a> Decode<'a> for ClearDiagnosticInfoRequest { #[cfg(test)] mod request { use super::*; - use crate::{Decode, Encode}; + use crate::{Decode, Encode, test_util::assert_encode_size_agrees}; #[test] fn decode_clear_dtc_info_request() { @@ -95,6 +95,7 @@ mod request { let written = Encode::encode(&req, &mut buf).unwrap(); assert_eq!(buf, [0xFF, 0xFF, 0xFF, 0x00]); assert_eq!(req.encoded_size(), written); + assert_encode_size_agrees(&req); } #[test] diff --git a/src/services/communication_control.rs b/src/services/communication_control.rs index cef0fdf..82298b1 100644 --- a/src/services/communication_control.rs +++ b/src/services/communication_control.rs @@ -191,7 +191,7 @@ impl<'a> Decode<'a> for CommunicationControlResponse { #[cfg(test)] mod request { use super::*; - use crate::{Decode, Encode}; + use crate::{Decode, Encode, test_util::assert_encode_size_agrees}; #[test] fn simple_request() { @@ -208,6 +208,7 @@ mod request { let written = Encode::encode(&req, &mut buffer).unwrap(); assert_eq!(written, req.encoded_size()); assert_eq!(buffer.len(), req.encoded_size()); + assert_encode_size_agrees(&req); } #[test] @@ -225,6 +226,7 @@ mod request { let written = Encode::encode(&req, &mut buffer).unwrap(); assert_eq!(written, req.encoded_size()); assert_eq!(buffer.len(), req.encoded_size()); + assert_encode_size_agrees(&req); } #[test] @@ -254,7 +256,7 @@ mod request { #[cfg(test)] mod response { use super::*; - use crate::{Decode, Encode}; + use crate::{Decode, Encode, test_util::assert_encode_size_agrees}; #[test] fn simple_response() { @@ -269,5 +271,6 @@ mod response { let written = Encode::encode(&res, &mut buffer).unwrap(); assert_eq!(written, 1); assert_eq!(buffer.len(), written); + assert_encode_size_agrees(&res); } } diff --git a/src/services/control_dtc_settings.rs b/src/services/control_dtc_settings.rs index b37c870..299819f 100644 --- a/src/services/control_dtc_settings.rs +++ b/src/services/control_dtc_settings.rs @@ -107,7 +107,7 @@ impl<'a> Decode<'a> for ControlDTCSettingsResponse { #[cfg(test)] mod request { use super::*; - use crate::{Decode, DtcSettings, Encode}; + use crate::{Decode, DtcSettings, Encode, test_util::assert_encode_size_agrees}; #[test] fn simple_request() { @@ -121,13 +121,14 @@ mod request { let (parsed, _) = ::decode(&buffer).unwrap(); assert_eq!(parsed.setting, DtcSettings::On); assert!(parsed.suppress_response); + assert_encode_size_agrees(&req); } } #[cfg(test)] mod response { use super::*; - use crate::{Decode, DtcSettings, Encode}; + use crate::{Decode, DtcSettings, Encode, test_util::assert_encode_size_agrees}; #[test] fn simple_response() { @@ -140,5 +141,6 @@ mod response { let (parsed, _) = ::decode(&buffer).unwrap(); assert_eq!(parsed.setting, DtcSettings::On); + assert_encode_size_agrees(&req); } } diff --git a/src/services/diagnostic_session_control.rs b/src/services/diagnostic_session_control.rs index 3e91c3b..fc1ac80 100644 --- a/src/services/diagnostic_session_control.rs +++ b/src/services/diagnostic_session_control.rs @@ -151,7 +151,7 @@ impl<'a> Decode<'a> for DiagnosticSessionControlResponse { #[cfg(test)] mod request { use super::*; - use crate::{Decode, DiagnosticSessionType, Encode}; + use crate::{Decode, DiagnosticSessionType, Encode, test_util::assert_encode_size_agrees}; #[test] fn test_diagnostic_session_control_request() { @@ -167,13 +167,14 @@ mod request { Encode::encode(&req, &mut buffer).unwrap(); assert_eq!(buffer, bytes); assert_eq!(req.encoded_size(), 1); + assert_encode_size_agrees(&req); } } #[cfg(test)] mod response { use super::*; - use crate::{Decode, DiagnosticSessionType, Encode}; + use crate::{Decode, DiagnosticSessionType, Encode, test_util::assert_encode_size_agrees}; #[test] fn test_diagnostic_session_control_response() { @@ -187,5 +188,6 @@ mod response { Encode::encode(&resp, &mut buffer).unwrap(); assert_eq!(buffer, bytes); assert_eq!(resp.encoded_size(), 5); + assert_encode_size_agrees(&resp); } } diff --git a/src/services/ecu_reset.rs b/src/services/ecu_reset.rs index ee3b0ef..c8b2272 100644 --- a/src/services/ecu_reset.rs +++ b/src/services/ecu_reset.rs @@ -125,7 +125,7 @@ impl<'a> Decode<'a> for EcuResetResponse { #[cfg(test)] mod request { use super::*; - use crate::{Decode, Encode}; + use crate::{Decode, Encode, test_util::assert_encode_size_agrees}; #[test] fn ecu_reset_request() { @@ -138,13 +138,14 @@ mod request { assert_eq!(written, 1); assert_eq!(written, req.encoded_size()); + assert_encode_size_agrees(&req); } } #[cfg(test)] mod response { use super::*; - use crate::{Decode, Encode}; + use crate::{Decode, Encode, test_util::assert_encode_size_agrees}; #[test] fn ecu_reset_response() { @@ -157,5 +158,6 @@ mod response { assert_eq!(written, 2); assert_eq!(written, resp.encoded_size()); + assert_encode_size_agrees(&resp); } } diff --git a/src/services/negative_response.rs b/src/services/negative_response.rs index 34a6a56..6afbdbc 100644 --- a/src/services/negative_response.rs +++ b/src/services/negative_response.rs @@ -56,3 +56,18 @@ impl<'a> Decode<'a> for NegativeResponse { )) } } + +#[cfg(test)] +mod tests { + use super::*; + use crate::test_util::assert_encode_size_agrees; + + #[test] + fn negative_response_encode_size_agrees() { + let value = NegativeResponse::new( + UdsServiceType::DiagnosticSessionControl, + NegativeResponseCode::ServiceNotSupported, + ); + assert_encode_size_agrees(&value); + } +} diff --git a/src/services/request_download.rs b/src/services/request_download.rs index 0a1da3f..54cecd6 100644 --- a/src/services/request_download.rs +++ b/src/services/request_download.rs @@ -206,7 +206,7 @@ impl<'a> Decode<'a> for RequestDownloadResponseTx<'a> { #[cfg(test)] mod tests { use super::*; - use crate::{Decode, Encode}; + use crate::{Decode, Encode, test_util::assert_encode_size_agrees}; #[test] fn simple_request() { @@ -292,5 +292,13 @@ mod tests { Encode::encode(&req, &mut vec).unwrap(); assert_eq!(vec.len(), req.encoded_size()); + assert_encode_size_agrees(&req); + } + + #[test] + fn response_encode_size_agrees() { + let block = [0x10u8, 0x00, 0x00]; + let resp = RequestDownloadResponseTx::new(0x30, &block); + assert_encode_size_agrees(&resp); } } diff --git a/src/services/request_file_transfer.rs b/src/services/request_file_transfer.rs index 0229514..c7a414d 100644 --- a/src/services/request_file_transfer.rs +++ b/src/services/request_file_transfer.rs @@ -799,6 +799,7 @@ impl<'a> Decode<'a> for RequestFileTransferResponseTx<'a> { #[cfg(test)] mod request_tests { use super::*; + use crate::test_util::assert_encode_size_agrees; #[test] fn test_file_operation_mode() { @@ -833,6 +834,7 @@ mod request_tests { let (decoded, rest) = NamePayloadTx::decode(&buf[..written]).unwrap(); assert!(rest.is_empty()); assert_eq!(decoded, n); + assert_encode_size_agrees(&n); } #[test] @@ -848,6 +850,7 @@ mod request_tests { let (decoded, rest) = SizePayload::decode(&buf[..written]).unwrap(); assert!(rest.is_empty()); assert_eq!(decoded, s); + assert_encode_size_agrees(&s); } #[test] @@ -868,6 +871,7 @@ mod request_tests { let (decoded, rest) = RequestFileTransferRequestTx::decode(&buf[..written]).unwrap(); assert!(rest.is_empty()); assert_eq!(decoded, req); + assert_encode_size_agrees(&req); } #[test] @@ -883,6 +887,7 @@ mod request_tests { let (decoded, rest) = RequestFileTransferRequestTx::decode(&buf[..written]).unwrap(); assert!(rest.is_empty()); assert_eq!(decoded, req); + assert_encode_size_agrees(&req); } #[test] @@ -898,6 +903,7 @@ mod request_tests { let (decoded, rest) = RequestFileTransferRequestTx::decode(&buf[..written]).unwrap(); assert!(rest.is_empty()); assert_eq!(decoded, req); + assert_encode_size_agrees(&req); } #[test] @@ -909,6 +915,7 @@ mod request_tests { let written = Encode::encode(&req, &mut buf.as_mut_slice()).unwrap(); let (decoded, _) = RequestFileTransferRequestTx::decode(&buf[..written]).unwrap(); assert_eq!(decoded, req); + assert_encode_size_agrees(&req); } #[test] @@ -927,12 +934,14 @@ mod request_tests { let written = Encode::encode(&req, &mut buf.as_mut_slice()).unwrap(); let (decoded, _) = RequestFileTransferRequestTx::decode(&buf[..written]).unwrap(); assert_eq!(decoded, req); + assert_encode_size_agrees(&req); } } #[cfg(test)] mod response_tests { use super::*; + use crate::test_util::assert_encode_size_agrees; fn sent_data<'a>(block: &'a [u8]) -> SentDataPayloadTx<'a> { SentDataPayloadTx { @@ -955,6 +964,7 @@ mod response_tests { let (decoded, rest) = RequestFileTransferResponseTx::decode(&buf[..written]).unwrap(); assert!(rest.is_empty()); assert_eq!(decoded, resp); + assert_encode_size_agrees(&resp); } #[test] @@ -965,6 +975,7 @@ mod response_tests { assert_eq!(written, 1); let (decoded, _) = RequestFileTransferResponseTx::decode(&buf[..written]).unwrap(); assert_eq!(decoded, resp); + assert_encode_size_agrees(&resp); } #[test] @@ -984,6 +995,7 @@ mod response_tests { let written = Encode::encode(&resp, &mut buf.as_mut_slice()).unwrap(); let (decoded, _) = RequestFileTransferResponseTx::decode(&buf[..written]).unwrap(); assert_eq!(decoded, resp); + assert_encode_size_agrees(&resp); } #[test] @@ -1002,6 +1014,7 @@ mod response_tests { let written = Encode::encode(&resp, &mut buf.as_mut_slice()).unwrap(); let (decoded, _) = RequestFileTransferResponseTx::decode(&buf[..written]).unwrap(); assert_eq!(decoded, resp); + assert_encode_size_agrees(&resp); } #[test] @@ -1019,5 +1032,6 @@ mod response_tests { let written = Encode::encode(&resp, &mut buf.as_mut_slice()).unwrap(); let (decoded, _) = RequestFileTransferResponseTx::decode(&buf[..written]).unwrap(); assert_eq!(decoded, resp); + assert_encode_size_agrees(&resp); } } diff --git a/src/services/security_access.rs b/src/services/security_access.rs index 5fc3a70..c561483 100644 --- a/src/services/security_access.rs +++ b/src/services/security_access.rs @@ -164,7 +164,7 @@ impl<'a> Decode<'a> for SecurityAccessResponseTx<'a> { #[cfg(test)] mod request { use super::*; - use crate::{Decode, Encode}; + use crate::{Decode, Encode, test_util::assert_encode_size_agrees}; #[test] fn request_seed() { @@ -181,13 +181,14 @@ mod request { let written = Encode::encode(&req, &mut buf).unwrap(); assert_eq!(written, bytes.len()); assert_eq!(written, req.encoded_size()); + assert_encode_size_agrees(&req); } } #[cfg(test)] mod response { use super::*; - use crate::{Decode, Encode}; + use crate::{Decode, Encode, test_util::assert_encode_size_agrees}; #[test] fn response_send() { @@ -204,5 +205,6 @@ mod response { let written = Encode::encode(&resp, &mut buf).unwrap(); assert_eq!(written, bytes.len()); assert_eq!(written, resp.encoded_size()); + assert_encode_size_agrees(&resp); } } diff --git a/src/services/tester_present.rs b/src/services/tester_present.rs index 8968d87..c969e7d 100644 --- a/src/services/tester_present.rs +++ b/src/services/tester_present.rs @@ -164,7 +164,7 @@ impl<'a> Decode<'a> for TesterPresentResponse { #[cfg(test)] mod test { use super::*; - use crate::{Decode, Encode}; + use crate::{Decode, Encode, test_util::assert_encode_size_agrees}; #[test] fn try_from_all_zero_subfunction() { @@ -244,6 +244,7 @@ mod test { let expected_bytes = vec![0]; assert_eq!(buffer, expected_bytes); + assert_encode_size_agrees(&test_type); } #[test] @@ -261,5 +262,6 @@ mod test { let expected_bytes = vec![0]; assert_eq!(buffer, expected_bytes); + assert_encode_size_agrees(&test_type); } } diff --git a/src/services/transfer_data.rs b/src/services/transfer_data.rs index 046d67b..10eb76e 100644 --- a/src/services/transfer_data.rs +++ b/src/services/transfer_data.rs @@ -122,7 +122,7 @@ impl<'a> Decode<'a> for TransferDataResponseTx<'a> { #[cfg(test)] mod request { use super::*; - use crate::{Decode, Encode}; + use crate::{Decode, Encode, test_util::assert_encode_size_agrees}; #[test] fn test_transfer_data_request() { @@ -141,13 +141,14 @@ mod request { let written = Encode::encode(&req, &mut written_bytes).unwrap(); assert_eq!(written, written_bytes.len()); assert_eq!(written, req.encoded_size()); + assert_encode_size_agrees(&req); } } #[cfg(test)] mod response { use super::*; - use crate::{Decode, Encode}; + use crate::{Decode, Encode, test_util::assert_encode_size_agrees}; #[test] fn simple_response() { @@ -158,5 +159,6 @@ mod response { let written = Encode::encode(&resp, &mut written_bytes).unwrap(); assert_eq!(written, written_bytes.len()); assert_eq!(written, resp.encoded_size()); + assert_encode_size_agrees(&resp); } } From 23a11e1456d0bbeb865922c204e37e50e0bbde32 Mon Sep 17 00:00:00 2001 From: Zach Heylmun Date: Tue, 2 Jun 2026 13:07:51 -0400 Subject: [PATCH 38/58] document the modeled vs pass-through service coverage boundary --- src/lib.rs | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/src/lib.rs b/src/lib.rs index 6fdd3e4..de17665 100644 --- a/src/lib.rs +++ b/src/lib.rs @@ -29,6 +29,19 @@ pub use service::UdsServiceType; mod services; pub use services::*; +/// ## Service coverage +/// +/// These services decode into typed [`Request`]/[`Response`] variants: +/// `DiagnosticSessionControl`, `EcuReset`, `SecurityAccess`, `CommunicationControl`, +/// `TesterPresent`, `ControlDTCSettings`, `ReadDataByIdentifier`, `WriteDataByIdentifier`, +/// `ClearDiagnosticInfo`, `ReadDTCInfo`, `RoutineControl`, `RequestDownload`, +/// `TransferData`, `RequestTransferExit`, `RequestFileTransfer`, and `NegativeResponse`. +/// +/// All other services enumerated in [`UdsServiceType`] (e.g. `Authentication`, +/// `ReadMemoryByAddress`, `RequestUpload`, `ResponseOnEvent`) are not individually +/// modeled. Frames for them decode into [`Request::Other`] / [`Response::Other`], +/// carrying the service type and raw payload bytes for pass-through. + /// UDS positive-response service-ID offset. Added to the request SID to form the response SID. pub const SUCCESS: u8 = 0x80; /// UDS `requestCorrectlyReceivedResponsePending` negative response code (`0x78`). From 59af1bc62633bb4d86115b08d9ec310ce36b13c6 Mon Sep 17 00:00:00 2001 From: Zach Heylmun Date: Tue, 2 Jun 2026 13:25:51 -0400 Subject: [PATCH 39/58] fix clippy doc_markdown warnings introduced by no_std refactor Add backticks to service names in the README support table and to DoIP/UDSonIP in the integration section. Convert the floating /// comment block in lib.rs (which clippy mis-attributed as a doc comment for SUCCESS) to regular // comments to silence empty_line_after_doc_comments. --- README.md | 56 +++++++++++++++++++++++++++--------------------------- src/lib.rs | 24 +++++++++++------------ 2 files changed, 40 insertions(+), 40 deletions(-) diff --git a/README.md b/README.md index 38ba8d5..cd644e9 100644 --- a/README.md +++ b/README.md @@ -14,38 +14,38 @@ It is not in a complete state yet with the 0.1.0 release, please check back soon This library provides serialization and deserialization of UDS messages. It is based on the ISO 14229-1:2020 standard. -| Service Name | Request SID | Response SID | Support | -|-----------------------------------|-------------|--------------|---------| -| DiagnosticSessionControl | 0x10 | 0x50 | ✓ | -| ECUReset | 0x11 | 0x51 | ✓ | -| ClearDiagnosticInformation | 0x14 | 0x54 | ✓ | -| ReadDTCInformation | 0x19 | 0x59 | Partial | -| ReadDataByIdentifier | 0x22 | 0x62 | ✓ | -| ReadMemoryByAddress | 0x23 | 0x63 | | -| ReadScalingDataByIdentifier | 0x24 | 0x64 | | -| SecurityAccess | 0x27 | 0x67 | ✓ | -| CommunicationControl | 0x28 | 0x68 | ✓ | -| Authentication | 0x29 | 0x69 | | -| ReadDataByPeriodicIdentifier | 0x2A | 0x6A | | -| WriteDataByIdentifier | 0x2E | 0x6E | ✓ | -| InputOutputControlByIdentifier | 0x2F | 0x6F | | -| RoutineControl | 0x31 | 0x71 | ✓ | -| RequestDownload | 0x34 | 0x74 | ✓ | -| RequestUpload | 0x35 | 0x75 | | -| TransferData | 0x36 | 0x76 | ✓ | -| RequestTransferExit | 0x37 | 0x77 | ✓ | -| RequestFileTransfer | 0x38 | 0x78 | ✓ | -| WriteMemoryByAddress | 0x3D | 0x7D | | -| TesterPresent | 0x3E | 0x7E | ✓ | -| SecuredDataTransmission | 0x84 | 0xC4 | | -| ControlDTCSetting | 0x85 | 0xC5 | ✓ | -| ResponseOnEvent | 0x86 | 0xC6 | | -| LinkControl | 0x87 | 0xC7 | | +| Service Name | Request SID | Response SID | Support | +|---------------------------------------|-------------|--------------|---------| +| `DiagnosticSessionControl` | 0x10 | 0x50 | ✓ | +| `ECUReset` | 0x11 | 0x51 | ✓ | +| `ClearDiagnosticInformation` | 0x14 | 0x54 | ✓ | +| `ReadDTCInformation` | 0x19 | 0x59 | Partial | +| `ReadDataByIdentifier` | 0x22 | 0x62 | ✓ | +| `ReadMemoryByAddress` | 0x23 | 0x63 | | +| `ReadScalingDataByIdentifier` | 0x24 | 0x64 | | +| `SecurityAccess` | 0x27 | 0x67 | ✓ | +| `CommunicationControl` | 0x28 | 0x68 | ✓ | +| `Authentication` | 0x29 | 0x69 | | +| `ReadDataByPeriodicIdentifier` | 0x2A | 0x6A | | +| `WriteDataByIdentifier` | 0x2E | 0x6E | ✓ | +| `InputOutputControlByIdentifier` | 0x2F | 0x6F | | +| `RoutineControl` | 0x31 | 0x71 | ✓ | +| `RequestDownload` | 0x34 | 0x74 | ✓ | +| `RequestUpload` | 0x35 | 0x75 | | +| `TransferData` | 0x36 | 0x76 | ✓ | +| `RequestTransferExit` | 0x37 | 0x77 | ✓ | +| `RequestFileTransfer` | 0x38 | 0x78 | ✓ | +| `WriteMemoryByAddress` | 0x3D | 0x7D | | +| `TesterPresent` | 0x3E | 0x7E | ✓ | +| `SecuredDataTransmission` | 0x84 | 0xC4 | | +| `ControlDTCSetting` | 0x85 | 0xC5 | ✓ | +| `ResponseOnEvent` | 0x86 | 0xC6 | | +| `LinkControl` | 0x87 | 0xC7 | | ## Integration `uds_protocol` is a synchronous, allocation-free codec. It owns no sockets, buffers, or -async runtime. To use it over any transport (DoIP, UDSonIP, ISO-TP, …): +async runtime. To use it over any transport (`DoIP`, `UDSonIP`, ISO-TP, …): - **Decode** an inbound frame from the `&[u8]` you received. - **Encode** an outbound frame into any `embedded_io::Write` (or a caller-owned buffer diff --git a/src/lib.rs b/src/lib.rs index de17665..8864f45 100644 --- a/src/lib.rs +++ b/src/lib.rs @@ -29,18 +29,18 @@ pub use service::UdsServiceType; mod services; pub use services::*; -/// ## Service coverage -/// -/// These services decode into typed [`Request`]/[`Response`] variants: -/// `DiagnosticSessionControl`, `EcuReset`, `SecurityAccess`, `CommunicationControl`, -/// `TesterPresent`, `ControlDTCSettings`, `ReadDataByIdentifier`, `WriteDataByIdentifier`, -/// `ClearDiagnosticInfo`, `ReadDTCInfo`, `RoutineControl`, `RequestDownload`, -/// `TransferData`, `RequestTransferExit`, `RequestFileTransfer`, and `NegativeResponse`. -/// -/// All other services enumerated in [`UdsServiceType`] (e.g. `Authentication`, -/// `ReadMemoryByAddress`, `RequestUpload`, `ResponseOnEvent`) are not individually -/// modeled. Frames for them decode into [`Request::Other`] / [`Response::Other`], -/// carrying the service type and raw payload bytes for pass-through. +// ## Service coverage +// +// These services decode into typed [`Request`]/[`Response`] variants: +// `DiagnosticSessionControl`, `EcuReset`, `SecurityAccess`, `CommunicationControl`, +// `TesterPresent`, `ControlDTCSettings`, `ReadDataByIdentifier`, `WriteDataByIdentifier`, +// `ClearDiagnosticInfo`, `ReadDTCInfo`, `RoutineControl`, `RequestDownload`, +// `TransferData`, `RequestTransferExit`, `RequestFileTransfer`, and `NegativeResponse`. +// +// All other services enumerated in [`UdsServiceType`] (e.g. `Authentication`, +// `ReadMemoryByAddress`, `RequestUpload`, `ResponseOnEvent`) are not individually +// modeled. Frames for them decode into [`Request::Other`] / [`Response::Other`], +// carrying the service type and raw payload bytes for pass-through. /// UDS positive-response service-ID offset. Added to the request SID to form the response SID. pub const SUCCESS: u8 = 0x80; From 66643352ab38a02d0ced058f9d76815d4a9bc717 Mon Sep 17 00:00:00 2001 From: Zach Heylmun Date: Tue, 2 Jun 2026 13:28:38 -0400 Subject: [PATCH 40/58] move service-coverage docs into published README docs The coverage notes were plain // comments invisible to rustdoc; move them into the README front-page docs where they render. --- README.md | 13 +++++++++++++ src/lib.rs | 13 ------------- 2 files changed, 13 insertions(+), 13 deletions(-) diff --git a/README.md b/README.md index cd644e9..ac7e7b4 100644 --- a/README.md +++ b/README.md @@ -78,3 +78,16 @@ let (response, _rest) = Response::decode(&frame).unwrap(); The decoded value **borrows** from `frame`: it points into that buffer (like a `struct` overlaid on a `char buf[]`) and is valid only while `frame` lives. Copy out any fields you need to keep before the buffer is reused. + +## Service coverage + +These services decode into typed [`Request`]/[`Response`] variants: `DiagnosticSessionControl`, +`EcuReset`, `SecurityAccess`, `CommunicationControl`, `TesterPresent`, `ControlDTCSettings`, +`ReadDataByIdentifier`, `WriteDataByIdentifier`, `ClearDiagnosticInfo`, `ReadDTCInfo`, +`RoutineControl`, `RequestDownload`, `TransferData`, `RequestTransferExit`, `RequestFileTransfer`, +and `NegativeResponse`. + +All other services enumerated in [`UdsServiceType`] (e.g. `Authentication`, `ReadMemoryByAddress`, +`RequestUpload`, `ResponseOnEvent`) are not individually modeled. Frames for them decode into +[`Request::Other`] / [`Response::Other`], carrying the service type and raw payload bytes for +pass-through. diff --git a/src/lib.rs b/src/lib.rs index 8864f45..6fdd3e4 100644 --- a/src/lib.rs +++ b/src/lib.rs @@ -29,19 +29,6 @@ pub use service::UdsServiceType; mod services; pub use services::*; -// ## Service coverage -// -// These services decode into typed [`Request`]/[`Response`] variants: -// `DiagnosticSessionControl`, `EcuReset`, `SecurityAccess`, `CommunicationControl`, -// `TesterPresent`, `ControlDTCSettings`, `ReadDataByIdentifier`, `WriteDataByIdentifier`, -// `ClearDiagnosticInfo`, `ReadDTCInfo`, `RoutineControl`, `RequestDownload`, -// `TransferData`, `RequestTransferExit`, `RequestFileTransfer`, and `NegativeResponse`. -// -// All other services enumerated in [`UdsServiceType`] (e.g. `Authentication`, -// `ReadMemoryByAddress`, `RequestUpload`, `ResponseOnEvent`) are not individually -// modeled. Frames for them decode into [`Request::Other`] / [`Response::Other`], -// carrying the service type and raw payload bytes for pass-through. - /// UDS positive-response service-ID offset. Added to the request SID to form the response SID. pub const SUCCESS: u8 = 0x80; /// UDS `requestCorrectlyReceivedResponsePending` negative response code (`0x78`). From 311472e0de758866f12b1ef120c42fa6ec1a2ab8 Mon Sep 17 00:00:00 2001 From: Zach Heylmun Date: Tue, 2 Jun 2026 13:46:38 -0400 Subject: [PATCH 41/58] correct README scope: embedded-first no_std codec The intro still claimed embedded support was a non-goal, contradicting the no_std rearchitecture and the new Integration section. --- README.md | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) diff --git a/README.md b/README.md index ac7e7b4..411b53a 100644 --- a/README.md +++ b/README.md @@ -1,8 +1,7 @@ # Unified Diagnostics Services (UDS) Protocol -This crate aims to offer an ergonomic implementation of the UDS protocol for tooling and test workloads in Rust. -Embedded support is an explicit, non-goal of this library. -It suppports both serialization and deserialization of UDS both protocol messages as well as custom data types. +This crate offers an ergonomic, `no_std`-friendly implementation of the UDS (ISO 14229) protocol codec in Rust. +It targets embedded ECU diagnostics and desktop tooling alike: encoding and decoding UDS protocol messages — and custom data types — with no required allocator and no async runtime. It is not in a complete state yet with the 0.1.0 release, please check back soon! [![Crates.io](https://img.shields.io/crates/v/uds_protocol.svg?style=for-the-badge)](https://crates.io/crates/uds_protocol) From 1d6264f525825af810528318bdf27c8adabff7c9 Mon Sep 17 00:00:00 2001 From: Zach Heylmun Date: Tue, 2 Jun 2026 15:02:54 -0400 Subject: [PATCH 42/58] gate Vec-using tests behind alloc so the no_std test matrix compiles Pre-existing: test code used bare vec!/Vec under #![no_std]. Gate those tests behind feature=alloc and import alloc::{vec, vec::Vec} so all feature combos compile and std/alloc combos run. Also forward the alloc feature to embedded-io so Vec implements embedded_io::Write under alloc-only builds. --- Cargo.toml | 2 +- src/lib.rs | 3 +++ src/services/clear_dtc_information.rs | 3 +++ src/services/communication_control.rs | 7 +++++++ src/services/control_dtc_settings.rs | 6 ++++++ src/services/diagnostic_session_control.rs | 6 ++++++ src/services/ecu_reset.rs | 6 ++++++ src/services/request_download.rs | 3 +++ src/services/security_access.rs | 6 ++++++ src/services/tester_present.rs | 7 +++++++ src/services/transfer_data.rs | 6 ++++++ 11 files changed, 54 insertions(+), 1 deletion(-) diff --git a/Cargo.toml b/Cargo.toml index eb4f9e9..1b2682c 100644 --- a/Cargo.toml +++ b/Cargo.toml @@ -21,7 +21,7 @@ authors = [ [features] default = ["std"] std = ["alloc", "byteorder-embedded-io/std", "embedded-io/std", "thiserror/std"] -alloc = [] +alloc = ["embedded-io/alloc"] serde = ["dep:serde", "dep:serde_bytes"] utoipa = ["dep:utoipa"] clap = ["dep:clap"] diff --git a/src/lib.rs b/src/lib.rs index 6fdd3e4..b7a5a61 100644 --- a/src/lib.rs +++ b/src/lib.rs @@ -117,6 +117,8 @@ impl TryFrom for DtcSettings { #[cfg(test)] mod no_std_api_tests { use super::*; + #[cfg(feature = "alloc")] + use alloc::vec::Vec; #[test] fn encode_decode_tester_present_roundtrip() { @@ -168,6 +170,7 @@ mod no_std_api_tests { assert_eq!(req.service(), UdsServiceType::EcuReset); } + #[cfg(feature = "alloc")] #[test] fn dtc_and_status_iter_roundtrip() { // 2 DTC records: (0x01,0x02,0x03, status=0x0A), (0x04,0x05,0x06, status=0x0B) diff --git a/src/services/clear_dtc_information.rs b/src/services/clear_dtc_information.rs index ee2063d..62fb46f 100644 --- a/src/services/clear_dtc_information.rs +++ b/src/services/clear_dtc_information.rs @@ -83,7 +83,10 @@ impl<'a> Decode<'a> for ClearDiagnosticInfoRequest { mod request { use super::*; use crate::{Decode, Encode, test_util::assert_encode_size_agrees}; + #[cfg(feature = "alloc")] + use alloc::vec; + #[cfg(feature = "alloc")] #[test] fn decode_clear_dtc_info_request() { let bytes = [0xFF, 0xFF, 0xFF, 0x00]; diff --git a/src/services/communication_control.rs b/src/services/communication_control.rs index 82298b1..af74a18 100644 --- a/src/services/communication_control.rs +++ b/src/services/communication_control.rs @@ -192,7 +192,10 @@ impl<'a> Decode<'a> for CommunicationControlResponse { mod request { use super::*; use crate::{Decode, Encode, test_util::assert_encode_size_agrees}; + #[cfg(feature = "alloc")] + use alloc::vec::Vec; + #[cfg(feature = "alloc")] #[test] fn simple_request() { let bytes: [u8; 3] = [0x01, 0x02, 0x03]; @@ -211,6 +214,7 @@ mod request { assert_encode_size_agrees(&req); } + #[cfg(feature = "alloc")] #[test] fn node_id() { let bytes: [u8; 4] = [0x05, 0x02, 0x01, 0x02]; @@ -257,7 +261,10 @@ mod request { mod response { use super::*; use crate::{Decode, Encode, test_util::assert_encode_size_agrees}; + #[cfg(feature = "alloc")] + use alloc::vec::Vec; + #[cfg(feature = "alloc")] #[test] fn simple_response() { let bytes: [u8; 1] = [0x01]; diff --git a/src/services/control_dtc_settings.rs b/src/services/control_dtc_settings.rs index 299819f..bcf17dc 100644 --- a/src/services/control_dtc_settings.rs +++ b/src/services/control_dtc_settings.rs @@ -108,7 +108,10 @@ impl<'a> Decode<'a> for ControlDTCSettingsResponse { mod request { use super::*; use crate::{Decode, DtcSettings, Encode, test_util::assert_encode_size_agrees}; + #[cfg(feature = "alloc")] + use alloc::{vec, vec::Vec}; + #[cfg(feature = "alloc")] #[test] fn simple_request() { let req = ControlDTCSettingsRequest::new(DtcSettings::On, true); @@ -129,7 +132,10 @@ mod request { mod response { use super::*; use crate::{Decode, DtcSettings, Encode, test_util::assert_encode_size_agrees}; + #[cfg(feature = "alloc")] + use alloc::{vec, vec::Vec}; + #[cfg(feature = "alloc")] #[test] fn simple_response() { let req = ControlDTCSettingsResponse::new(DtcSettings::On); diff --git a/src/services/diagnostic_session_control.rs b/src/services/diagnostic_session_control.rs index fc1ac80..441981c 100644 --- a/src/services/diagnostic_session_control.rs +++ b/src/services/diagnostic_session_control.rs @@ -152,7 +152,10 @@ impl<'a> Decode<'a> for DiagnosticSessionControlResponse { mod request { use super::*; use crate::{Decode, DiagnosticSessionType, Encode, test_util::assert_encode_size_agrees}; + #[cfg(feature = "alloc")] + use alloc::vec::Vec; + #[cfg(feature = "alloc")] #[test] fn test_diagnostic_session_control_request() { let bytes: [u8; 1] = [0x02]; @@ -175,7 +178,10 @@ mod request { mod response { use super::*; use crate::{Decode, DiagnosticSessionType, Encode, test_util::assert_encode_size_agrees}; + #[cfg(feature = "alloc")] + use alloc::vec::Vec; + #[cfg(feature = "alloc")] #[test] fn test_diagnostic_session_control_response() { let bytes = [0x02, 0x11, 0x22, 0x33, 0x44]; diff --git a/src/services/ecu_reset.rs b/src/services/ecu_reset.rs index c8b2272..3701436 100644 --- a/src/services/ecu_reset.rs +++ b/src/services/ecu_reset.rs @@ -126,7 +126,10 @@ impl<'a> Decode<'a> for EcuResetResponse { mod request { use super::*; use crate::{Decode, Encode, test_util::assert_encode_size_agrees}; + #[cfg(feature = "alloc")] + use alloc::vec::Vec; + #[cfg(feature = "alloc")] #[test] fn ecu_reset_request() { let bytes: [u8; 2] = [0x81, 0x00]; @@ -146,7 +149,10 @@ mod request { mod response { use super::*; use crate::{Decode, Encode, test_util::assert_encode_size_agrees}; + #[cfg(feature = "alloc")] + use alloc::vec::Vec; + #[cfg(feature = "alloc")] #[test] fn ecu_reset_response() { let bytes: [u8; 2] = [0x01, 0x20]; diff --git a/src/services/request_download.rs b/src/services/request_download.rs index 54cecd6..2cc8038 100644 --- a/src/services/request_download.rs +++ b/src/services/request_download.rs @@ -207,6 +207,8 @@ impl<'a> Decode<'a> for RequestDownloadResponseTx<'a> { mod tests { use super::*; use crate::{Decode, Encode, test_util::assert_encode_size_agrees}; + #[cfg(feature = "alloc")] + use alloc::{vec, vec::Vec}; #[test] fn simple_request() { @@ -284,6 +286,7 @@ mod tests { assert_eq!(decoded.memory_size, 0); } + #[cfg(feature = "alloc")] #[test] fn check_message_size() { let req = RequestDownloadRequest::new(0x00.into(), 0xF0_FF_FF_67, 0x0A).unwrap(); diff --git a/src/services/security_access.rs b/src/services/security_access.rs index c561483..1dd2beb 100644 --- a/src/services/security_access.rs +++ b/src/services/security_access.rs @@ -165,7 +165,10 @@ impl<'a> Decode<'a> for SecurityAccessResponseTx<'a> { mod request { use super::*; use crate::{Decode, Encode, test_util::assert_encode_size_agrees}; + #[cfg(feature = "alloc")] + use alloc::vec::Vec; + #[cfg(feature = "alloc")] #[test] fn request_seed() { let bytes: [u8; 6] = [ @@ -189,7 +192,10 @@ mod request { mod response { use super::*; use crate::{Decode, Encode, test_util::assert_encode_size_agrees}; + #[cfg(feature = "alloc")] + use alloc::vec::Vec; + #[cfg(feature = "alloc")] #[test] fn response_send() { let bytes: [u8; 6] = [ diff --git a/src/services/tester_present.rs b/src/services/tester_present.rs index c969e7d..9c6ae0c 100644 --- a/src/services/tester_present.rs +++ b/src/services/tester_present.rs @@ -165,6 +165,8 @@ impl<'a> Decode<'a> for TesterPresentResponse { mod test { use super::*; use crate::{Decode, Encode, test_util::assert_encode_size_agrees}; + #[cfg(feature = "alloc")] + use alloc::{vec, vec::Vec}; #[test] fn try_from_all_zero_subfunction() { @@ -197,12 +199,14 @@ mod test { } } + #[cfg(feature = "alloc")] fn make_request(byte: u8) -> Result { let bytes = vec![byte]; let (val, _) = ::decode(&bytes)?; Ok(val) } + #[cfg(feature = "alloc")] #[test] fn read_request_type() { for i in 0..u8::MAX { @@ -236,6 +240,7 @@ mod test { } } + #[cfg(feature = "alloc")] #[test] fn write_request_type() { let test_type = TesterPresentRequest::new(false); @@ -247,6 +252,7 @@ mod test { assert_encode_size_agrees(&test_type); } + #[cfg(feature = "alloc")] #[test] fn read_response_type() { let bytes = vec![0u8]; @@ -254,6 +260,7 @@ mod test { assert_eq!(test_type, TesterPresentResponse::new()); } + #[cfg(feature = "alloc")] #[test] fn write_response_type() { let test_type = TesterPresentResponse::new(); diff --git a/src/services/transfer_data.rs b/src/services/transfer_data.rs index 10eb76e..f3fed78 100644 --- a/src/services/transfer_data.rs +++ b/src/services/transfer_data.rs @@ -123,6 +123,8 @@ impl<'a> Decode<'a> for TransferDataResponseTx<'a> { mod request { use super::*; use crate::{Decode, Encode, test_util::assert_encode_size_agrees}; + #[cfg(feature = "alloc")] + use alloc::vec::Vec; #[test] fn test_transfer_data_request() { @@ -132,6 +134,7 @@ mod request { assert_eq!(req.data, &[0x01, 0x02, 0x03, 0x04]); } + #[cfg(feature = "alloc")] #[test] fn read_request() { let bytes = [0x01, 0x02, 0x03, 0x04]; @@ -149,7 +152,10 @@ mod request { mod response { use super::*; use crate::{Decode, Encode, test_util::assert_encode_size_agrees}; + #[cfg(feature = "alloc")] + use alloc::vec::Vec; + #[cfg(feature = "alloc")] #[test] fn simple_response() { let bytes = [0x01, 0x02, 0x03, 0x04]; From d8a2035146d91e94b5ec454b2aeac0fda96183be Mon Sep 17 00:00:00 2001 From: Zach Heylmun Date: Tue, 2 Jun 2026 19:18:47 -0400 Subject: [PATCH 43/58] drop unused Vec import in request_download tests CI sets RUSTFLAGS=-Dwarnings, so the unused `vec::Vec` import (the test module uses only `vec!`) failed the all-features Build-and-Test and MSRV jobs. Import only `alloc::vec`. --- src/services/request_download.rs | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/src/services/request_download.rs b/src/services/request_download.rs index 2cc8038..8b4555e 100644 --- a/src/services/request_download.rs +++ b/src/services/request_download.rs @@ -208,7 +208,7 @@ mod tests { use super::*; use crate::{Decode, Encode, test_util::assert_encode_size_agrees}; #[cfg(feature = "alloc")] - use alloc::{vec, vec::Vec}; + use alloc::vec; #[test] fn simple_request() { From 6fe84bc5659a2ca710d21e9dcd81c81a9ac7d56e Mon Sep 17 00:00:00 2001 From: Zach Heylmun Date: Wed, 3 Jun 2026 14:04:05 -0400 Subject: [PATCH 44/58] add API exposure & consistency design doc Phase 1 (deliberate crate-root exports + complete the codec-incomplete descriptors) and a Phase 2 open-questions framing (naming, typed-vs-raw RX symmetry, codec dedup) for landing the no_std breaking change as one cohesive chunk. --- ...-03-api-exposure-and-consistency-design.md | 124 ++++++++++++++++++ 1 file changed, 124 insertions(+) create mode 100644 docs/superpowers/specs/2026-06-03-api-exposure-and-consistency-design.md diff --git a/docs/superpowers/specs/2026-06-03-api-exposure-and-consistency-design.md b/docs/superpowers/specs/2026-06-03-api-exposure-and-consistency-design.md new file mode 100644 index 0000000..760370e --- /dev/null +++ b/docs/superpowers/specs/2026-06-03-api-exposure-and-consistency-design.md @@ -0,0 +1,124 @@ +# UDS Protocol — API Exposure & Consistency Design + +**Date:** 2026-06-03 +**Branch:** `feature/no_std` +**Status:** Design — pending user review, then implementation plan +**Follows:** `2026-06-01-no-std-api-alignment-design.md` (this completes and tightens that work; it does **not** change tack) + +## Purpose + +The `no_std` rearchitecture is substantially landed but left two consistency gaps a +reviewer spots immediately: (1) several intended-public types are reachable only +through glob re-exports and some are codec-incomplete, and (2) the `Request` / +`Response` enums model the same class of service inconsistently (some wrap a typed +descriptor, others hand back raw bytes or decomposed fields). We want to ship this +major breaking change as **one cohesive chunk**, so we close these before publishing. + +This is split into two phases. **Phase 1** (this doc, ready to implement) deliberately +exposes and completes the descriptor types without restructuring the dispatch enums. +**Phase 2** (framed here, to be planned separately) resolves the naming and +typed-vs-raw symmetry questions across the enums. + +## Guiding principle (unchanged, clarified) + +Carried from the prior design: **concrete types, no generics, no user-supplied types.** +Clarified here: "lightweight descriptor" means a concrete type that **faithfully models +the ISO-14229 message elements** so a caller can describe a request precisely — it does +**not** mean "minimal" or "raw." Where ISO enumerates the structure (e.g. the ~25 +`ReadDTCInformation` sub-functions), the descriptor models it fully. Where the payload +is opaque or caller-defined (routine parameters, write data records, security seeds), +it is carried as a borrowed `&[u8]`. + +- **TX side:** lightweight typed descriptors that implement `Encode`. +- **RX side:** borrowed slices / lazy iterators for variable-length response sequences + (the `ReadDTCInfoResponseRx` model); fixed/small spec structures stay typed. + +## Confirmed decisions for Phase 1 + +- **Deliberate exposure.** Every intended-public type is re-exported **by name** from + the crate root. Glob re-exports (`pub use services::*;`, `pub use common::*;`) are + replaced with explicit named lists in `lib.rs`. Rationale: an intentional public + surface, individually documented types, and globs are how the current orphans hid. +- **Complete the codec-incomplete descriptors.** `ReadDTCInfoRequest` gains a real + `Encode`; `WriteDataByIdentifierResponse` gains `Decode`. The DTC parameter types + that `ReadDTCInfoRequest` needs gain `Encode`. +- **No enum restructuring in Phase 1.** `Request` / `Response` variant shapes are left + exactly as they are; the typed-vs-raw symmetry decision is Phase 2. +- **No speculative code (YAGNI).** Parameter types gain `Encode` only (not `Decode`); + `Decode` is added later only if Phase 2 decides to type the request RX path. + +## Phase 1 — commit series + +Each commit builds and tests green on its own across the CI matrix. + +1. **Explicit crate-root re-exports.** Replace `pub use services::*;` and + `pub use common::*;` in `src/lib.rs` with explicit named re-exports. No type changes; + pure surface tightening. Verify nothing public is dropped or newly hidden. +2. **`Encode` for the 1-byte DTC parameter types** currently lacking it: + `DTCSeverityMask`, `FunctionalGroupIdentifier`, `DTCSnapshotRecordNumber`, + `DTCExtDataRecordNumber`, `DTCStoredDataRecordNumber`. (`DTCStatusMask` and + `DTCRecord` already implement `Encode`.) Each is a small, faithful 1-byte/3-byte + spec encoder with `assert_encode_size_agrees` coverage. +3. **`Encode` + `encoded_size` for `ReadDTCInfoRequest`** over all 25 + `ReadDTCInfoSubFunction` variants: write the sub-function byte, then encode each + variant's typed parameters (now that they all implement `Encode`). Add encode tests + with `assert_encode_size_agrees` for representative variants (no-param, + single-param, multi-param, `ISOSAEReserved`). +4. **`Decode` for `WriteDataByIdentifierResponse`** (2-byte big-endian `u16`), with a + round-trip test. +5. **Usage / round-trip tests for the TX builders** so none is dead: + `ReadDataByIdentifierRequestTx`, `WriteDataByIdentifierRequestTx`, + `RoutineControlRequestTx`, `RoutineControlResponseTx`. Confirms each is constructible + and encodes to the expected wire bytes. + +### Phase 1 testing + +- All new `Encode`/`Decode` impls covered by `assert_encode_size_agrees` and explicit + wire-byte assertions. +- Full matrix builds and passes: default (`std`), + `--no-default-features --features alloc`, `--no-default-features`, and + `thumbv6m-none-eabi`. Clippy clean on all host combos. +- A doc/grep check that the explicit re-export list covers everything the glob did. + +## Phase 2 — open questions (to be planned after Phase 1) + +Phase 2 is **not** specified here — it is the set of decisions to work through next. +Captured now so they are not lost. Notably, the RX side is already +borrowed-slice/bidirectional, so this is mostly naming and symmetry, not a heavy +re-parse-to-raw migration. + +1. **`...ResponseTx` naming (Decision 4 follow-up).** `SecurityAccessResponseTx`, + `TransferDataResponseTx`, `RequestDownloadResponseTx`, and + `RequestFileTransferResponseTx` are decoded on the RX path (wrapped in `Response`) + yet carry the TX-only `...Tx` suffix. They are really *bidirectional borrowed* types, + a case Decision 4 never named. Ruling needed: rename to `...Rx`, keep `...Tx`, or + define a bidirectional/no-suffix convention. +2. **Typed-vs-raw RX symmetry (the core fork).** The enums are inconsistent: + `SecurityAccess` / `TransferData` / `RequestFileTransfer` / `RequestDownload` wrap a + typed descriptor, while `ReadDataByIdentifier` / `WriteDataByIdentifier` / + `ReadDTCInfo` / `RoutineControl` hand back raw `&[u8]` or decomposed + `{ sub_function: u8, raw_payload }`. Decide whether decode should produce the typed + descriptors (symmetric, round-trippable) or whether the raw holdouts should be + normalized further toward raw. This is the inconsistency the code review flagged. +3. **Dedup the variable-length integer codec.** The + `[0u8; N]` + `copy_from_slice` + `from_be_bytes` pattern (and its `to_be_bytes` + encode twin) is duplicated across `SizePayload`, `FileSizePayload`, `DirSizePayload` + (`request_file_transfer.rs`) and `RequestDownloadRequest` (`request_download.rs`). + Extract a shared `read_var_be_uint` / `write_var_be_uint` helper. +4. **Merge the duplicated primitive macros.** `unsigned_primitive_encode_decode!` and + `signed_primitive_encode_decode!` in `primitive_generics.rs` have byte-for-byte + identical bodies; collapse to one macro. + +## Out of scope + +- Implementing additional UDS services (still reached via `Other`). +- Any transport, session, or async layer. +- The Phase 2 decisions themselves — only their framing is recorded here. + +## Risks + +- **Public-surface drift when de-globbing.** Mitigated by a grep/doc diff confirming the + explicit list matches the glob's prior exports before committing. +- **`ReadDTCInfoRequest::encode` correctness across 25 variants.** Mitigated by + per-variant `assert_encode_size_agrees` and wire-byte tests, and by reusing the + parameter types' own `Encode` impls rather than re-deriving byte layouts. From 091ecbad7fe479a9c29223b10d8aebd3b43867d9 Mon Sep 17 00:00:00 2001 From: Zach Heylmun Date: Wed, 3 Jun 2026 14:16:20 -0400 Subject: [PATCH 45/58] add Phase 1 implementation plan (API exposure & consistency) --- ...-03-api-exposure-and-consistency-phase1.md | 696 ++++++++++++++++++ 1 file changed, 696 insertions(+) create mode 100644 docs/superpowers/plans/2026-06-03-api-exposure-and-consistency-phase1.md diff --git a/docs/superpowers/plans/2026-06-03-api-exposure-and-consistency-phase1.md b/docs/superpowers/plans/2026-06-03-api-exposure-and-consistency-phase1.md new file mode 100644 index 0000000..a46af45 --- /dev/null +++ b/docs/superpowers/plans/2026-06-03-api-exposure-and-consistency-phase1.md @@ -0,0 +1,696 @@ +# API Exposure & Consistency — Phase 1 Implementation Plan + +> **For agentic workers:** REQUIRED SUB-SKILL: Use superpowers:subagent-driven-development (recommended) or superpowers:executing-plans to implement this plan task-by-task. Steps use checkbox (`- [ ]`) syntax for tracking. + +**Goal:** Deliberately expose every intended-public type from the crate root and complete the two codec-incomplete descriptors (`ReadDTCInfoRequest` gains `Encode`; `WriteDataByIdentifierResponse` gains `Decode`), so the `no_std` breaking change ships as one cohesive chunk. + +**Architecture:** Five independent commits. (1) Replace the `pub use {common,services}::*` globs in `lib.rs` with explicit named re-exports. (2) Add 1-byte `Encode` impls to the five DTC parameter types `ReadDTCInfoSubFunction` needs, fixing a latent `todo!()` panic in `FunctionalGroupIdentifier::value()`. (3) Give `ReadDTCInfoSubFunction` (and a delegating `ReadDTCInfoRequest`) a faithful per-variant `Encode`. (4) Give `WriteDataByIdentifierResponse` a 2-byte `Decode`. (5) Add crate-root integration tests proving the completed types round-trip through the public API. No `Request`/`Response` enum shapes change — that is Phase 2. + +**Tech Stack:** Rust, `no_std` + `no_alloc` (`alloc`/`std` additive), `embedded_io::Write` for encoding, borrowed `&[u8]` for decoding. Test helper `assert_encode_size_agrees` in `src/test_util.rs`. + +**Spec:** `docs/superpowers/specs/2026-06-03-api-exposure-and-consistency-design.md` + +--- + +## Conventions for every task + +- Local per-task verification: `cargo test --all-features` (fast host run). +- Commit message format (matches repo history): + ``` + + + Co-Authored-By: Claude Opus 4.8 + ``` +- Do **not** touch `Request`/`Response` enum variant shapes anywhere in this plan. + +--- + +## Task 1: De-glob the crate-root re-exports + +Replace the two wildcard re-exports in `src/lib.rs` with explicit named lists so the public surface is intentional and individually documented. The compiler is the safety net: every internal module imports common/service types via `crate::…`, so a missing name fails the build. + +**Files:** +- Modify: `src/lib.rs:18` (`pub use common::*;`) and `src/lib.rs:30` (`pub use services::*;`) + +- [ ] **Step 1: Replace `pub use common::*;`** + +In `src/lib.rs`, replace the single line `pub use common::*;` with: + +```rust +pub use common::{ + CLEAR_ALL_DTCS, CommunicationControlType, CommunicationType, DTCExtDataRecordNumber, + DTCFormatIdentifier, DTCRecord, DTCSeverityMask, DTCSeverityRecord, DTCSnapshotRecordNumber, + DTCStatusMask, DTCStoredDataRecordNumber, DiagnosticSessionType, FunctionalGroupIdentifier, + NegativeResponseCode, ResetType, SecurityAccessType, UDSIdentifier, UDSRoutineIdentifier, + param_length_u128, param_length_u16, param_length_u32, param_length_u64, +}; +``` + +- [ ] **Step 2: Replace `pub use services::*;`** + +In `src/lib.rs`, replace the single line `pub use services::*;` with: + +```rust +pub use services::{ + ClearDiagnosticInfoRequest, CommunicationControlRequest, CommunicationControlResponse, + ControlDTCSettingsRequest, ControlDTCSettingsResponse, DiagnosticSessionControlRequest, + DiagnosticSessionControlResponse, DirSizePayload, DtcAndStatusIter, DtcFaultDetectionIter, + DtcSeverityAndStatusIter, EcuResetRequest, EcuResetResponse, FileOperationMode, + FileSizePayload, NamePayloadTx, NegativeResponse, PositionPayload, + ReadDTCInfoRequest, ReadDTCInfoResponseRx, ReadDTCInfoSubFunction, + ReadDataByIdentifierRequestTx, RequestDownloadRequest, RequestDownloadResponseTx, + RequestFileTransferRequestTx, RequestFileTransferResponseTx, RoutineControlRequestTx, + RoutineControlResponseTx, SecurityAccessRequestTx, SecurityAccessResponseTx, SentDataPayloadTx, + SizePayload, TesterPresentRequest, TesterPresentResponse, TransferDataRequestTx, + TransferDataResponseTx, WriteDataByIdentifierRequestTx, WriteDataByIdentifierResponse, +}; +``` + +- [ ] **Step 3: Build to verify no public name was dropped** + +Run: `cargo build --all-features` +Expected: PASS. A missing re-export would fail here (internal modules resolve these via `crate::…`). If a name is reported unresolved or unused, add/remove it from the lists above to match. + +- [ ] **Step 4: Confirm nothing newly hidden / formatting** + +Run: `cargo test --all-features && cargo fmt -- --check` +Expected: PASS (tests reference these names through the crate root). If `cargo fmt` reports diffs, run `cargo fmt` and re-check. + +- [ ] **Step 5: Commit** + +```bash +git add src/lib.rs +git commit -m "$(printf 'make crate-root re-exports explicit (drop glob re-exports)\n\nCo-Authored-By: Claude Opus 4.8 ')" +``` + +--- + +## Task 2: `Encode` for the five DTC parameter types + +`ReadDTCInfoSubFunction` (Task 3) encodes its parameters by delegating to each parameter type's own `Encode`. `DTCStatusMask` and `DTCRecord` already implement `Encode`; these five do not yet. Each is a 1-byte value. This task also fixes a latent `todo!()` panic in `FunctionalGroupIdentifier::value()`. + +**Files:** +- Modify: `src/common/dtc_snapshot.rs` (add `use` + `Encode` for `DTCSnapshotRecordNumber`) +- Modify: `src/common/dtc_ext_data.rs` (add `use` + `Encode` for `DTCExtDataRecordNumber`) +- Modify: `src/common/dtc_status.rs` (`Encode` for `DTCStoredDataRecordNumber`, `DTCSeverityMask`, `FunctionalGroupIdentifier`; fix `FunctionalGroupIdentifier::value()`) + +- [ ] **Step 1: Write failing tests for all five `Encode` impls** + +In `src/common/dtc_snapshot.rs`, inside `mod snapshot`, add: + +```rust + #[test] + fn encode_snapshot_record_number() { + use crate::test_util::assert_encode_size_agrees; + let n = DTCSnapshotRecordNumber::new(0x02); + let mut buf = [0u8; 4]; + let written = crate::Encode::encode(&n, &mut buf.as_mut_slice()).unwrap(); + assert_eq!(written, 1); + assert_eq!(buf[0], 0x02); + assert_encode_size_agrees(&n); + } +``` + +In `src/common/dtc_ext_data.rs`, inside `mod tests`, add: + +```rust + #[test] + fn encode_ext_data_record_number() { + use crate::test_util::assert_encode_size_agrees; + let n = DTCExtDataRecordNumber::new(0x90); + let mut buf = [0u8; 4]; + let written = crate::Encode::encode(&n, &mut buf.as_mut_slice()).unwrap(); + assert_eq!(written, 1); + assert_eq!(buf[0], 0x90); + assert_encode_size_agrees(&n); + } +``` + +In `src/common/dtc_status.rs`, add a test module at the end of the file (if one does not exist) or append these tests to the existing `#[cfg(test)] mod` block: + +```rust +#[cfg(test)] +mod encode_param_tests { + use super::*; + use crate::test_util::assert_encode_size_agrees; + + #[test] + fn encode_stored_data_record_number() { + let n = DTCStoredDataRecordNumber::new(0x05).unwrap(); + let mut buf = [0u8; 4]; + let written = Encode::encode(&n, &mut buf.as_mut_slice()).unwrap(); + assert_eq!(written, 1); + assert_eq!(buf[0], 0x05); + assert_encode_size_agrees(&n); + } + + #[test] + fn encode_severity_mask() { + let m = DTCSeverityMask::CheckImmediately; + let mut buf = [0u8; 4]; + let written = Encode::encode(&m, &mut buf.as_mut_slice()).unwrap(); + assert_eq!(written, 1); + assert_eq!(buf[0], 0b1000_0000); + assert_encode_size_agrees(&m); + } + + #[test] + fn encode_functional_group_identifier_named() { + let g = FunctionalGroupIdentifier::EmissionsSystemGroup; + let mut buf = [0u8; 4]; + let written = Encode::encode(&g, &mut buf.as_mut_slice()).unwrap(); + assert_eq!(written, 1); + assert_eq!(buf[0], 0x33); + assert_encode_size_agrees(&g); + } + + #[test] + fn functional_group_identifier_value_does_not_panic_on_reserved() { + // Regression: value() previously called todo!() for carried-byte variants. + let g = FunctionalGroupIdentifier::from(0x10); // -> ISOSAEReserved(0x10) + assert_eq!(g.value(), 0x10); + let g2 = FunctionalGroupIdentifier::from(0xD5); // -> LegislativeSystemGroup(0xD5) + assert_eq!(g2.value(), 0xD5); + } +} +``` + +- [ ] **Step 2: Run the tests to verify they fail** + +Run: `cargo test --all-features encode_snapshot_record_number encode_ext_data_record_number encode_stored_data_record_number encode_severity_mask encode_functional_group_identifier_named functional_group_identifier_value_does_not_panic_on_reserved` +Expected: FAIL — `Encode` not implemented for these types; the reserved-value test panics with `todo!`. + +- [ ] **Step 3: Fix `FunctionalGroupIdentifier::value()`** + +In `src/common/dtc_status.rs`, replace the body of `FunctionalGroupIdentifier::value()` (currently the `match` with two `todo!()` arms) with: + +```rust + /// Return the raw `u8` value of this functional group identifier. + #[must_use] + pub fn value(&self) -> u8 { + match self { + FunctionalGroupIdentifier::EmissionsSystemGroup => 0x33, + FunctionalGroupIdentifier::SafetySystemGroup => 0xD0, + FunctionalGroupIdentifier::VODBSystem => 0xFE, + FunctionalGroupIdentifier::LegislativeSystemGroup(value) + | FunctionalGroupIdentifier::ISOSAEReserved(value) => *value, + } + } +``` + +- [ ] **Step 4: Add the `Encode` impls** + +In `src/common/dtc_snapshot.rs`, add at the top of the file (the file currently has no imports): + +```rust +use crate::{Encode, Error}; +``` + +and after the `impl PartialEq for DTCSnapshotRecordNumber` block add: + +```rust +impl Encode for DTCSnapshotRecordNumber { + fn encoded_size(&self) -> usize { + 1 + } + + fn encode(&self, writer: &mut impl embedded_io::Write) -> Result { + writer.write_all(&[self.value()]).map_err(Error::io)?; + Ok(1) + } +} +``` + +In `src/common/dtc_ext_data.rs`, add at the top of the file: + +```rust +use crate::{Encode, Error}; +``` + +and after the `impl PartialEq for DTCExtDataRecordNumber` block add: + +```rust +impl Encode for DTCExtDataRecordNumber { + fn encoded_size(&self) -> usize { + 1 + } + + fn encode(&self, writer: &mut impl embedded_io::Write) -> Result { + writer.write_all(&[self.value()]).map_err(Error::io)?; + Ok(1) + } +} +``` + +In `src/common/dtc_status.rs` (which already imports `Encode`/`Error` for the existing `DTCStatusMask`/`DTCRecord` impls), add these three impls (place each near its type definition): + +```rust +impl Encode for DTCStoredDataRecordNumber { + fn encoded_size(&self) -> usize { + 1 + } + + fn encode(&self, writer: &mut impl embedded_io::Write) -> Result { + writer.write_all(&[self.0]).map_err(Error::io)?; + Ok(1) + } +} + +impl Encode for DTCSeverityMask { + fn encoded_size(&self) -> usize { + 1 + } + + fn encode(&self, writer: &mut impl embedded_io::Write) -> Result { + writer.write_all(&[self.bits()]).map_err(Error::io)?; + Ok(1) + } +} + +impl Encode for FunctionalGroupIdentifier { + fn encoded_size(&self) -> usize { + 1 + } + + fn encode(&self, writer: &mut impl embedded_io::Write) -> Result { + writer.write_all(&[self.value()]).map_err(Error::io)?; + Ok(1) + } +} +``` + +- [ ] **Step 5: Run the tests to verify they pass** + +Run: `cargo test --all-features encode_snapshot_record_number encode_ext_data_record_number encode_stored_data_record_number encode_severity_mask encode_functional_group_identifier_named functional_group_identifier_value_does_not_panic_on_reserved` +Expected: PASS. + +- [ ] **Step 6: Commit** + +```bash +git add src/common/dtc_snapshot.rs src/common/dtc_ext_data.rs src/common/dtc_status.rs +git commit -m "$(printf 'add Encode to DTC parameter types; fix FunctionalGroupIdentifier::value panic\n\nCo-Authored-By: Claude Opus 4.8 ')" +``` + +--- + +## Task 3: `Encode` for `ReadDTCInfoSubFunction` and `ReadDTCInfoRequest` + +Give the 25-variant `ReadDTCInfoSubFunction` a faithful `Encode` (sub-function byte + each variant's typed parameters, delegating to the parameter `Encode` impls from Task 2), and have `ReadDTCInfoRequest` delegate to it. The two match arms (in `encode` and `encoded_size`) use identical variant grouping and reference `encoded_size()` rather than hard-coded widths; `assert_encode_size_agrees` guards drift. + +**Files:** +- Modify: `src/services/read_dtc_information.rs` (already imports `Decode, Encode, Error`) + +- [ ] **Step 1: Write failing tests** + +In `src/services/read_dtc_information.rs`, add (or extend) a `#[cfg(test)]` module with: + +```rust +#[cfg(test)] +mod read_dtc_info_request_encode_tests { + use super::*; + use crate::test_util::assert_encode_size_agrees; + + #[test] + fn encode_no_param_subfunction() { + // 0x0A ReportSupportedDTC, no parameters. + let req = ReadDTCInfoRequest::new(ReadDTCInfoSubFunction::ReportSupportedDTC); + let mut buf = [0u8; 8]; + let written = Encode::encode(&req, &mut buf.as_mut_slice()).unwrap(); + assert_eq!(&buf[..written], &[0x0A]); + assert_encode_size_agrees(&req); + } + + #[test] + fn encode_single_param_subfunction() { + // 0x02 ReportDTC_ByStatusMask(mask). DTCStatusMask is 1 byte. + let mask = DTCStatusMask::from(0xFF); + let req = + ReadDTCInfoRequest::new(ReadDTCInfoSubFunction::ReportDTC_ByStatusMask(mask)); + let mut buf = [0u8; 8]; + let written = Encode::encode(&req, &mut buf.as_mut_slice()).unwrap(); + assert_eq!(&buf[..written], &[0x02, 0xFF]); + assert_encode_size_agrees(&req); + } + + #[test] + fn encode_multi_param_subfunction() { + // 0x42 ReportWWHOBDDTC_ByMaskRecord(group, status, severity). + let req = ReadDTCInfoRequest::new( + ReadDTCInfoSubFunction::ReportWWHOBDDTC_ByMaskRecord( + FunctionalGroupIdentifier::EmissionsSystemGroup, + DTCStatusMask::from(0x08), + DTCSeverityMask::CheckImmediately, + ), + ); + let mut buf = [0u8; 8]; + let written = Encode::encode(&req, &mut buf.as_mut_slice()).unwrap(); + assert_eq!(&buf[..written], &[0x42, 0x33, 0x08, 0b1000_0000]); + assert_encode_size_agrees(&req); + } + + #[test] + fn encode_reserved_subfunction() { + // ISOSAEReserved carries the sub-function byte itself, no params. + let req = ReadDTCInfoRequest::new(ReadDTCInfoSubFunction::ISOSAEReserved(0x57)); + let mut buf = [0u8; 8]; + let written = Encode::encode(&req, &mut buf.as_mut_slice()).unwrap(); + assert_eq!(&buf[..written], &[0x57]); + assert_encode_size_agrees(&req); + } +} +``` + +- [ ] **Step 2: Run tests to verify they fail** + +Run: `cargo test --all-features read_dtc_info_request_encode_tests` +Expected: FAIL — `Encode` not implemented for `ReadDTCInfoRequest`. + +- [ ] **Step 3: Implement `Encode` for `ReadDTCInfoSubFunction`** + +In `src/services/read_dtc_information.rs`, after the `impl ReadDTCInfoSubFunction { … value() … }` block, add: + +```rust +impl Encode for ReadDTCInfoSubFunction { + fn encoded_size(&self) -> usize { + use ReadDTCInfoSubFunction as S; + 1 + match self { + S::ReportNumberOfDTC_ByStatusMask(m) + | S::ReportDTC_ByStatusMask(m) + | S::ReportUserDefMemoryDTC_ByStatusMask(m) => m.encoded_size(), + S::ReportDTCSnapshotRecord_ByDTCNumber(r, n) => r.encoded_size() + n.encoded_size(), + S::ReportDTCStoredData_ByRecordNumber(n) => n.encoded_size(), + S::ReportDTCExtDataRecord_ByDTCNumber(r, n) => r.encoded_size() + n.encoded_size(), + S::ReportNumberOfDTC_BySeverityMaskRecord(s, m) + | S::ReportDTC_BySeverityMaskRecord(s, m) => s.encoded_size() + m.encoded_size(), + S::ReportSeverityInfoOfDTC(r) => r.encoded_size(), + S::ReportDTCExtDataRecord_ByRecordNumber(n) + | S::ReportSupportedDTCExtDataRecord(n) => n.encoded_size(), + S::ReportUserDefMemoryDTCSnapshotRecord_ByDTCNumber(r, n, mem) => { + r.encoded_size() + n.encoded_size() + mem.encoded_size() + } + S::ReportUserDefMemoryDTCExtDataRecord_ByDTCNumber(r, n, mem) => { + r.encoded_size() + n.encoded_size() + mem.encoded_size() + } + S::ReportWWHOBDDTC_ByMaskRecord(g, m, s) => { + g.encoded_size() + m.encoded_size() + s.encoded_size() + } + S::ReportWWHOBDDTC_WithPermanentStatus(g) => g.encoded_size(), + S::ReportDTCInformation_ByDTCReadinessGroupIdentifier(g, rg) => { + g.encoded_size() + rg.encoded_size() + } + S::ReportDTCSnapshotIdentification + | S::ReportSupportedDTC + | S::ReportFirstTestFailedDTC + | S::ReportFirstConfirmedDTC + | S::ReportMostRecentTestFailedDTC + | S::ReportMostRecentConfirmedDTC + | S::ReportDTCFaultDetectionCounter + | S::ReportDTCWithPermanentStatus + | S::ISOSAEReserved(_) => 0, + } + } + + fn encode(&self, writer: &mut impl embedded_io::Write) -> Result { + use ReadDTCInfoSubFunction as S; + writer.write_all(&[self.value()]).map_err(Error::io)?; + match self { + S::ReportNumberOfDTC_ByStatusMask(m) + | S::ReportDTC_ByStatusMask(m) + | S::ReportUserDefMemoryDTC_ByStatusMask(m) => { + m.encode(writer)?; + } + S::ReportDTCSnapshotRecord_ByDTCNumber(r, n) => { + r.encode(writer)?; + n.encode(writer)?; + } + S::ReportDTCStoredData_ByRecordNumber(n) => { + n.encode(writer)?; + } + S::ReportDTCExtDataRecord_ByDTCNumber(r, n) => { + r.encode(writer)?; + n.encode(writer)?; + } + S::ReportNumberOfDTC_BySeverityMaskRecord(s, m) + | S::ReportDTC_BySeverityMaskRecord(s, m) => { + s.encode(writer)?; + m.encode(writer)?; + } + S::ReportSeverityInfoOfDTC(r) => { + r.encode(writer)?; + } + S::ReportDTCExtDataRecord_ByRecordNumber(n) + | S::ReportSupportedDTCExtDataRecord(n) => { + n.encode(writer)?; + } + S::ReportUserDefMemoryDTCSnapshotRecord_ByDTCNumber(r, n, mem) => { + r.encode(writer)?; + n.encode(writer)?; + mem.encode(writer)?; + } + S::ReportUserDefMemoryDTCExtDataRecord_ByDTCNumber(r, n, mem) => { + r.encode(writer)?; + n.encode(writer)?; + mem.encode(writer)?; + } + S::ReportWWHOBDDTC_ByMaskRecord(g, m, s) => { + g.encode(writer)?; + m.encode(writer)?; + s.encode(writer)?; + } + S::ReportWWHOBDDTC_WithPermanentStatus(g) => { + g.encode(writer)?; + } + S::ReportDTCInformation_ByDTCReadinessGroupIdentifier(g, rg) => { + g.encode(writer)?; + rg.encode(writer)?; + } + S::ReportDTCSnapshotIdentification + | S::ReportSupportedDTC + | S::ReportFirstTestFailedDTC + | S::ReportFirstConfirmedDTC + | S::ReportMostRecentTestFailedDTC + | S::ReportMostRecentConfirmedDTC + | S::ReportDTCFaultDetectionCounter + | S::ReportDTCWithPermanentStatus + | S::ISOSAEReserved(_) => {} + } + Ok(self.encoded_size()) + } +} +``` + +(Note: `mem` is `MemorySelection` and `rg` is `DTCReadinessGroupIdentifier`; both are `type … = u8;` aliases, and `u8` already implements `Encode` with a 1-byte width.) + +- [ ] **Step 4: Implement `Encode` for `ReadDTCInfoRequest` (delegates)** + +In `src/services/read_dtc_information.rs`, after the `impl ReadDTCInfoRequest { … new() … }` block, add: + +```rust +impl Encode for ReadDTCInfoRequest { + fn encoded_size(&self) -> usize { + self.dtc_subfunction.encoded_size() + } + + fn encode(&self, writer: &mut impl embedded_io::Write) -> Result { + self.dtc_subfunction.encode(writer) + } +} +``` + +- [ ] **Step 5: Run tests to verify they pass** + +Run: `cargo test --all-features read_dtc_info_request_encode_tests` +Expected: PASS. + +- [ ] **Step 6: Commit** + +```bash +git add src/services/read_dtc_information.rs +git commit -m "$(printf 'implement Encode for ReadDTCInfoSubFunction and ReadDTCInfoRequest\n\nCo-Authored-By: Claude Opus 4.8 ')" +``` + +--- + +## Task 4: `Decode` for `WriteDataByIdentifierResponse` + +The fixed 2-byte echo response currently has `Encode` but no `Decode`, so it cannot round-trip. Add a 2-byte big-endian `Decode`. + +**Files:** +- Modify: `src/services/write_data_by_identifier.rs:2` (imports) and add a `Decode` impl + +- [ ] **Step 1: Write a failing round-trip test** + +In `src/services/write_data_by_identifier.rs`, inside `mod test`, add: + +```rust + #[test] + fn write_response_roundtrip() { + let response = WriteDataByIdentifierResponse::new(0xF186); + let mut buf = [0u8; 4]; + let written = Encode::encode(&response, &mut buf.as_mut_slice()).unwrap(); + let (decoded, rest) = + ::decode(&buf[..written]).unwrap(); + assert_eq!(decoded, response); + assert!(rest.is_empty()); + } + + #[test] + fn write_response_decode_rejects_short_buffer() { + let err = ::decode(&[0x01]); + assert!(err.is_err()); + } +``` + +- [ ] **Step 2: Run tests to verify they fail** + +Run: `cargo test --all-features write_response_roundtrip write_response_decode_rejects_short_buffer` +Expected: FAIL — `Decode` not implemented for `WriteDataByIdentifierResponse`. + +- [ ] **Step 3: Add `Decode` to imports and implement it** + +In `src/services/write_data_by_identifier.rs`, change the import line: + +```rust +use crate::{Encode, Error, NegativeResponseCode}; +``` + +to: + +```rust +use crate::{Decode, Encode, Error, NegativeResponseCode}; +``` + +Then add, after the `impl Encode for WriteDataByIdentifierResponse` block: + +```rust +impl<'a> Decode<'a> for WriteDataByIdentifierResponse { + fn decode(buf: &'a [u8]) -> Result<(Self, &'a [u8]), Error> { + if buf.len() < 2 { + return Err(Error::InsufficientData(2)); + } + let identifier = u16::from_be_bytes([buf[0], buf[1]]); + Ok((Self { identifier }, &buf[2..])) + } +} +``` + +- [ ] **Step 4: Run tests to verify they pass** + +Run: `cargo test --all-features write_response_roundtrip write_response_decode_rejects_short_buffer` +Expected: PASS. + +- [ ] **Step 5: Commit** + +```bash +git add src/services/write_data_by_identifier.rs +git commit -m "$(printf 'add Decode for WriteDataByIdentifierResponse (2-byte round-trip)\n\nCo-Authored-By: Claude Opus 4.8 ')" +``` + +--- + +## Task 5: Crate-root integration tests for the completed types + +Prove the two newly-completed types are reachable through the explicit crate-root re-exports (validating Task 1) and behave correctly end-to-end (validating Tasks 3–4). Tests import only via `crate::…` (the public surface), not via internal module paths. + +**Files:** +- Modify: `src/lib.rs` (`#[cfg(test)] mod no_std_api_tests`) + +- [ ] **Step 1: Write the integration tests** + +In `src/lib.rs`, inside `mod no_std_api_tests`, add: + +```rust + #[test] + fn read_dtc_info_request_encodes_through_public_api() { + // Public-surface construction: types reached via crate root, not common::/services::. + let req = ReadDTCInfoRequest::new(ReadDTCInfoSubFunction::ReportDTC_ByStatusMask( + DTCStatusMask::from(0xFF), + )); + let mut buf = [0u8; 8]; + let written = Encode::encode(&req, &mut buf.as_mut_slice()).unwrap(); + assert_eq!(&buf[..written], &[0x02, 0xFF]); + assert_eq!(written, req.encoded_size()); + } + + #[test] + fn write_data_by_identifier_response_roundtrips_through_public_api() { + let resp = WriteDataByIdentifierResponse::new(0xBEEF); + let mut buf = [0u8; 4]; + let written = Encode::encode(&resp, &mut buf.as_mut_slice()).unwrap(); + let (decoded, rest) = + ::decode(&buf[..written]).unwrap(); + assert_eq!(decoded, resp); + assert!(rest.is_empty()); + } +``` + +- [ ] **Step 2: Run tests to verify they pass** + +Run: `cargo test --all-features read_dtc_info_request_encodes_through_public_api write_data_by_identifier_response_roundtrips_through_public_api` +Expected: PASS. (If a name does not resolve, Task 1's re-export list is missing it — add it.) + +- [ ] **Step 3: Commit** + +```bash +git add src/lib.rs +git commit -m "$(printf 'add crate-root integration tests for completed descriptor types\n\nCo-Authored-By: Claude Opus 4.8 ')" +``` + +--- + +## Task 6: Full-matrix verification + +Confirm the whole CI matrix is green before considering Phase 1 done. No code changes; if any command fails, fix the offending task and re-run. + +- [ ] **Step 1: Ensure the bare-metal target is installed** + +Run: `rustup target add thumbv6m-none-eabi` +Expected: installed (or "up to date"). + +- [ ] **Step 2: Build + test (host, all features)** + +Run: +```bash +cargo build --all-features --release +cargo test --all-features +``` +Expected: PASS. + +- [ ] **Step 3: no_std / no_alloc builds** + +Run: +```bash +cargo build --no-default-features --target thumbv6m-none-eabi +cargo build --no-default-features --features alloc --target thumbv6m-none-eabi +``` +Expected: PASS. + +- [ ] **Step 4: Clippy on all host feature combos** + +Run: +```bash +cargo clippy --all-features +cargo clippy --no-default-features +cargo clippy --no-default-features --features alloc +``` +Expected: no warnings. (The crate sets `#![warn(clippy::pedantic, missing_docs)]`; resolve any new lints — all added items are documented and `#[must_use]` where applicable.) + +- [ ] **Step 5: Formatting + docs** + +Run: +```bash +cargo fmt -- --check +cargo doc --release --all-features --no-deps +``` +Expected: PASS (no diffs, no doc warnings). + +- [ ] **Step 6: (No commit)** — verification only. Phase 1 complete. + +--- + +## Self-review notes + +- **Spec coverage:** Phase-1 commit 1 → Task 1; commit 2 → Task 2; commit 3 → Task 3; commit 4 → Task 4; commit 5 (repurposed) → Task 5; matrix testing → Task 6. Phase 2 items are intentionally out of scope. +- **No enum restructuring:** confirmed — no task edits `Request`/`Response` variant shapes. +- **Type consistency:** `Encode`/`Decode` signatures match `src/traits.rs`; `assert_encode_size_agrees` matches `src/test_util.rs`; parameter accessor methods (`value()`, `bits()`, field `.0`) match the definitions in `src/common/`. +- **Latent bug:** `FunctionalGroupIdentifier::value()` `todo!()` panic is fixed in Task 2 (required for its `Encode`). From e93a6e4835b5f130e67e49028ed5be5d58e0ddd0 Mon Sep 17 00:00:00 2001 From: Zach Heylmun Date: Wed, 3 Jun 2026 14:34:59 -0400 Subject: [PATCH 46/58] make crate-root re-exports explicit (drop glob re-exports) --- src/lib.rs | 22 ++++++++++++++++++++-- src/services/communication_control.rs | 2 +- src/services/diagnostic_session_control.rs | 6 ++---- src/services/ecu_reset.rs | 3 ++- src/services/request_download.rs | 6 ++---- src/services/request_file_transfer.rs | 3 ++- src/services/security_access.rs | 5 ++--- src/services/tester_present.rs | 3 ++- 8 files changed, 33 insertions(+), 17 deletions(-) diff --git a/src/lib.rs b/src/lib.rs index b7a5a61..426ec2e 100644 --- a/src/lib.rs +++ b/src/lib.rs @@ -15,7 +15,13 @@ mod traits; pub use traits::{Decode, DecodeIter, Encode}; mod common; -pub use common::*; +pub use common::{ + CLEAR_ALL_DTCS, CommunicationControlType, CommunicationType, DTCExtDataRecordNumber, + DTCFormatIdentifier, DTCRecord, DTCSeverityMask, DTCSeverityRecord, DTCSnapshotRecordNumber, + DTCStatusMask, DTCStoredDataRecordNumber, DiagnosticSessionType, FunctionalGroupIdentifier, + NegativeResponseCode, ResetType, SecurityAccessType, UDSIdentifier, UDSRoutineIdentifier, + param_length_u16, param_length_u32, param_length_u64, param_length_u128, +}; mod request; pub use request::Request; @@ -27,7 +33,19 @@ mod service; pub use service::UdsServiceType; mod services; -pub use services::*; +pub use services::{ + ClearDiagnosticInfoRequest, CommunicationControlRequest, CommunicationControlResponse, + ControlDTCSettingsRequest, ControlDTCSettingsResponse, DiagnosticSessionControlRequest, + DiagnosticSessionControlResponse, DirSizePayload, DtcAndStatusIter, DtcFaultDetectionIter, + DtcSeverityAndStatusIter, EcuResetRequest, EcuResetResponse, FileOperationMode, + FileSizePayload, NamePayloadTx, NegativeResponse, PositionPayload, ReadDTCInfoRequest, + ReadDTCInfoResponseRx, ReadDTCInfoSubFunction, ReadDataByIdentifierRequestTx, + RequestDownloadRequest, RequestDownloadResponseTx, RequestFileTransferRequestTx, + RequestFileTransferResponseTx, RoutineControlRequestTx, RoutineControlResponseTx, + SecurityAccessRequestTx, SecurityAccessResponseTx, SentDataPayloadTx, SizePayload, + TesterPresentRequest, TesterPresentResponse, TransferDataRequestTx, TransferDataResponseTx, + WriteDataByIdentifierRequestTx, WriteDataByIdentifierResponse, +}; /// UDS positive-response service-ID offset. Added to the request SID to form the response SID. pub const SUCCESS: u8 = 0x80; diff --git a/src/services/communication_control.rs b/src/services/communication_control.rs index af74a18..a4c33ac 100644 --- a/src/services/communication_control.rs +++ b/src/services/communication_control.rs @@ -1,7 +1,7 @@ //! `CommunicationControl` (0x28) service implementation +use crate::common::SuppressablePositiveResponse; use crate::{ CommunicationControlType, CommunicationType, Decode, Encode, Error, NegativeResponseCode, - SuppressablePositiveResponse, }; const COMMUNICATION_CONTROL_NEGATIVE_RESPONSE_CODES: [NegativeResponseCode; 4] = [ diff --git a/src/services/diagnostic_session_control.rs b/src/services/diagnostic_session_control.rs index 441981c..77f5816 100644 --- a/src/services/diagnostic_session_control.rs +++ b/src/services/diagnostic_session_control.rs @@ -9,10 +9,8 @@ //! A server shall be capable of providing diagnostic functionality under normal operating conditions, //! as well as in other operation conditions defined by the vehicle manufacturer (e.g. limp home operation condition). -use crate::{ - Decode, DiagnosticSessionType, Encode, Error, NegativeResponseCode, - SuppressablePositiveResponse, -}; +use crate::common::SuppressablePositiveResponse; +use crate::{Decode, DiagnosticSessionType, Encode, Error, NegativeResponseCode}; const DIAGNOSTIC_SESSION_CONTROL_NEGATIVE_RESPONSE_CODES: [NegativeResponseCode; 3] = [ NegativeResponseCode::SubFunctionNotSupported, diff --git a/src/services/ecu_reset.rs b/src/services/ecu_reset.rs index 3701436..7cd2827 100644 --- a/src/services/ecu_reset.rs +++ b/src/services/ecu_reset.rs @@ -1,5 +1,6 @@ //! `ECUReset` (0x11) service implementation -use crate::{Decode, Encode, Error, NegativeResponseCode, ResetType, SuppressablePositiveResponse}; +use crate::common::SuppressablePositiveResponse; +use crate::{Decode, Encode, Error, NegativeResponseCode, ResetType}; const ECU_RESET_NEGATIVE_RESPONSE_CODES: [NegativeResponseCode; 4] = [ NegativeResponseCode::SubFunctionNotSupported, diff --git a/src/services/request_download.rs b/src/services/request_download.rs index 8b4555e..160d9f4 100644 --- a/src/services/request_download.rs +++ b/src/services/request_download.rs @@ -1,9 +1,7 @@ //! `RequestDownload` (0x34) service implementation -use crate::{ - DataFormatIdentifier, Decode, Encode, Error, LengthFormatIdentifier, MemoryFormatIdentifier, - NegativeResponseCode, -}; +use crate::common::{DataFormatIdentifier, LengthFormatIdentifier, MemoryFormatIdentifier}; +use crate::{Decode, Encode, Error, NegativeResponseCode}; const REQUEST_DOWNLOAD_NEGATIVE_RESPONSE_CODES: [NegativeResponseCode; 6] = [ NegativeResponseCode::IncorrectMessageLengthOrInvalidFormat, diff --git a/src/services/request_file_transfer.rs b/src/services/request_file_transfer.rs index c7a414d..5b6d940 100644 --- a/src/services/request_file_transfer.rs +++ b/src/services/request_file_transfer.rs @@ -1,6 +1,7 @@ //! `RequestFileTransfer` (0x38) service implementation -use crate::{DataFormatIdentifier, Decode, Encode, Error}; +use crate::common::DataFormatIdentifier; +use crate::{Decode, Encode, Error}; ///////////////////////////////////////// - Request - /////////////////////////////////////////////////// /// Mode of operation for file transfer requests diff --git a/src/services/security_access.rs b/src/services/security_access.rs index 1dd2beb..c856262 100644 --- a/src/services/security_access.rs +++ b/src/services/security_access.rs @@ -1,7 +1,6 @@ //! `SecurityAccess` (0x27) service implementation -use crate::{ - Decode, Encode, Error, NegativeResponseCode, SecurityAccessType, SuppressablePositiveResponse, -}; +use crate::common::SuppressablePositiveResponse; +use crate::{Decode, Encode, Error, NegativeResponseCode, SecurityAccessType}; /// List of allowed [`NegativeResponseCode`] variants for the `SecurityAccess` service const SECURITY_ACCESS_NEGATIVE_RESPONSE_CODES: [NegativeResponseCode; 8] = [ diff --git a/src/services/tester_present.rs b/src/services/tester_present.rs index 9c6ae0c..1204771 100644 --- a/src/services/tester_present.rs +++ b/src/services/tester_present.rs @@ -1,5 +1,6 @@ //! `TesterPresent` (0x3E) service implementation -use crate::{Decode, Encode, Error, NegativeResponseCode, SuppressablePositiveResponse}; +use crate::common::SuppressablePositiveResponse; +use crate::{Decode, Encode, Error, NegativeResponseCode}; const TESTER_PRESENT_NEGATIVE_RESPONSE_CODES: [NegativeResponseCode; 2] = [ NegativeResponseCode::SubFunctionNotSupported, From 1a542d5dcf50f05b75b5f75ae316ff06041c7a83 Mon Sep 17 00:00:00 2001 From: Zach Heylmun Date: Wed, 3 Jun 2026 14:45:15 -0400 Subject: [PATCH 47/58] add Encode to DTC parameter types; fix FunctionalGroupIdentifier::value panic --- src/common/dtc_ext_data.rs | 24 ++++++++++ src/common/dtc_snapshot.rs | 24 ++++++++++ src/common/dtc_status.rs | 92 +++++++++++++++++++++++++++++++++----- 3 files changed, 128 insertions(+), 12 deletions(-) diff --git a/src/common/dtc_ext_data.rs b/src/common/dtc_ext_data.rs index a2d3e02..a7c87e9 100644 --- a/src/common/dtc_ext_data.rs +++ b/src/common/dtc_ext_data.rs @@ -1,3 +1,5 @@ +use crate::{Encode, Error}; + /// The `DTCExtDataRecordNumber` is used in the request message to get a stored `DTCExtDataRecord` /// Its used to specify the type of `DTCExtDataRecord` to be reported. #[cfg_attr(feature = "serde", derive(serde::Deserialize, serde::Serialize))] @@ -65,6 +67,17 @@ impl PartialEq for DTCExtDataRecordNumber { } } +impl Encode for DTCExtDataRecordNumber { + fn encoded_size(&self) -> usize { + 1 + } + + fn encode(&self, writer: &mut impl embedded_io::Write) -> Result { + writer.write_all(&[self.value()]).map_err(Error::io)?; + Ok(1) + } +} + // tests #[cfg(test)] mod tests { @@ -76,4 +89,15 @@ mod tests { assert_eq!(record_number, DTCExtDataRecordNumber::ISOSAEReserved(0x00)); assert_eq!(record_number.value(), 0x00); } + + #[test] + fn encode_ext_data_record_number() { + use crate::test_util::assert_encode_size_agrees; + let n = DTCExtDataRecordNumber::new(0x90); + let mut buf = [0u8; 4]; + let written = crate::Encode::encode(&n, &mut buf.as_mut_slice()).unwrap(); + assert_eq!(written, 1); + assert_eq!(buf[0], 0x90); + assert_encode_size_agrees(&n); + } } diff --git a/src/common/dtc_snapshot.rs b/src/common/dtc_snapshot.rs index fea2021..9fab1ed 100644 --- a/src/common/dtc_snapshot.rs +++ b/src/common/dtc_snapshot.rs @@ -2,6 +2,8 @@ //! Snapshot data represents a collection of sensor values captured when a DTC is triggered. //! Represents the state of the server at the time the DTC was triggered. +use crate::{Encode, Error}; + /// Identifies which DTC snapshot record is being requested or reported. #[cfg_attr(feature = "serde", derive(serde::Deserialize, serde::Serialize))] #[cfg_attr(feature = "utoipa", derive(utoipa::ToSchema))] @@ -43,6 +45,17 @@ impl PartialEq for DTCSnapshotRecordNumber { } } +impl Encode for DTCSnapshotRecordNumber { + fn encoded_size(&self) -> usize { + 1 + } + + fn encode(&self, writer: &mut impl embedded_io::Write) -> Result { + writer.write_all(&[self.value()]).map_err(Error::io)?; + Ok(1) + } +} + #[cfg(test)] mod snapshot { use super::*; @@ -56,4 +69,15 @@ mod snapshot { let all = DTCSnapshotRecordNumber::new(0xFF); assert_eq!(all, DTCSnapshotRecordNumber::All); } + + #[test] + fn encode_snapshot_record_number() { + use crate::test_util::assert_encode_size_agrees; + let n = DTCSnapshotRecordNumber::new(0x02); + let mut buf = [0u8; 4]; + let written = crate::Encode::encode(&n, &mut buf.as_mut_slice()).unwrap(); + assert_eq!(written, 1); + assert_eq!(buf[0], 0x02); + assert_encode_size_agrees(&n); + } } diff --git a/src/common/dtc_status.rs b/src/common/dtc_status.rs index b1821fb..e6bd572 100644 --- a/src/common/dtc_status.rs +++ b/src/common/dtc_status.rs @@ -305,18 +305,8 @@ impl FunctionalGroupIdentifier { FunctionalGroupIdentifier::EmissionsSystemGroup => 0x33, FunctionalGroupIdentifier::SafetySystemGroup => 0xD0, FunctionalGroupIdentifier::VODBSystem => 0xFE, - FunctionalGroupIdentifier::LegislativeSystemGroup(value) => { - todo!( - "FunctionalGroupIdentifiers::LegislativeSystemGroup is not a valid value {}", - value - ) - } - FunctionalGroupIdentifier::ISOSAEReserved(value) => { - todo!( - "FunctionalGroupIdentifiers::ISOSAEReserved is not a valid value {}", - value - ) - } + FunctionalGroupIdentifier::LegislativeSystemGroup(value) + | FunctionalGroupIdentifier::ISOSAEReserved(value) => *value, } } } @@ -339,6 +329,17 @@ impl From for u8 { } } +impl Encode for FunctionalGroupIdentifier { + fn encoded_size(&self) -> usize { + 1 + } + + fn encode(&self, writer: &mut impl embedded_io::Write) -> Result { + writer.write_all(&[self.value()]).map_err(Error::io)?; + Ok(1) + } +} + /// GTR DTC Class Information /// /// Bits 7-5 of the DTCSeverityMask/DTCSeverity parameters contain severity information (optional) @@ -398,6 +399,17 @@ impl DTCSeverityMask { } } +impl Encode for DTCSeverityMask { + fn encoded_size(&self) -> usize { + 1 + } + + fn encode(&self, writer: &mut impl embedded_io::Write) -> Result { + writer.write_all(&[self.bits()]).map_err(Error::io)?; + Ok(1) + } +} + /// Indicates the number of the specific `DTCSnapshot` data record requested /// Setting to 0xFF will return all `DTCStoredDataRecords` at once #[cfg_attr(feature = "serde", derive(serde::Deserialize, serde::Serialize))] @@ -424,6 +436,17 @@ impl From for DTCStoredDataRecordNumber { } } +impl Encode for DTCStoredDataRecordNumber { + fn encoded_size(&self) -> usize { + 1 + } + + fn encode(&self, writer: &mut impl embedded_io::Write) -> Result { + writer.write_all(&[self.0]).map_err(Error::io)?; + Ok(1) + } +} + #[cfg_attr(feature = "serde", derive(serde::Deserialize, serde::Serialize))] #[cfg_attr(feature = "utoipa", derive(utoipa::ToSchema))] #[derive(Clone, Copy, Debug, PartialEq)] @@ -439,6 +462,51 @@ pub struct DTCSeverityRecord { pub dtc_status_mask: DTCStatusMask, } +#[cfg(test)] +mod encode_param_tests { + use super::*; + use crate::test_util::assert_encode_size_agrees; + + #[test] + fn encode_stored_data_record_number() { + let n = DTCStoredDataRecordNumber::new(0x05).unwrap(); + let mut buf = [0u8; 4]; + let written = Encode::encode(&n, &mut buf.as_mut_slice()).unwrap(); + assert_eq!(written, 1); + assert_eq!(buf[0], 0x05); + assert_encode_size_agrees(&n); + } + + #[test] + fn encode_severity_mask() { + let m = DTCSeverityMask::CheckImmediately; + let mut buf = [0u8; 4]; + let written = Encode::encode(&m, &mut buf.as_mut_slice()).unwrap(); + assert_eq!(written, 1); + assert_eq!(buf[0], 0b1000_0000); + assert_encode_size_agrees(&m); + } + + #[test] + fn encode_functional_group_identifier_named() { + let g = FunctionalGroupIdentifier::EmissionsSystemGroup; + let mut buf = [0u8; 4]; + let written = Encode::encode(&g, &mut buf.as_mut_slice()).unwrap(); + assert_eq!(written, 1); + assert_eq!(buf[0], 0x33); + assert_encode_size_agrees(&g); + } + + #[test] + fn functional_group_identifier_value_does_not_panic_on_reserved() { + // Regression: value() previously called todo!() for carried-byte variants. + let g = FunctionalGroupIdentifier::from(0x10); // -> ISOSAEReserved(0x10) + assert_eq!(g.value(), 0x10); + let g2 = FunctionalGroupIdentifier::from(0xD5); // -> LegislativeSystemGroup(0xD5) + assert_eq!(g2.value(), 0xD5); + } +} + #[cfg(test)] mod dtc_status_tests { use super::*; From 68297f8977a7bb334637390dcf39192bd2091074 Mon Sep 17 00:00:00 2001 From: Zach Heylmun Date: Wed, 3 Jun 2026 14:57:46 -0400 Subject: [PATCH 48/58] implement Encode for ReadDTCInfoSubFunction and ReadDTCInfoRequest --- src/services/read_dtc_information.rs | 169 +++++++++++++++++++++++++++ 1 file changed, 169 insertions(+) diff --git a/src/services/read_dtc_information.rs b/src/services/read_dtc_information.rs index d5055b5..7da5b3f 100644 --- a/src/services/read_dtc_information.rs +++ b/src/services/read_dtc_information.rs @@ -29,6 +29,67 @@ impl ReadDTCInfoRequest { } } +impl Encode for ReadDTCInfoRequest { + fn encoded_size(&self) -> usize { + self.dtc_subfunction.encoded_size() + } + + fn encode(&self, writer: &mut impl embedded_io::Write) -> Result { + self.dtc_subfunction.encode(writer) + } +} + +#[cfg(test)] +mod read_dtc_info_request_encode_tests { + use super::*; + use crate::test_util::assert_encode_size_agrees; + + #[test] + fn encode_no_param_subfunction() { + // 0x0A ReportSupportedDTC, no parameters. + let req = ReadDTCInfoRequest::new(ReadDTCInfoSubFunction::ReportSupportedDTC); + let mut buf = [0u8; 8]; + let written = Encode::encode(&req, &mut buf.as_mut_slice()).unwrap(); + assert_eq!(&buf[..written], &[0x0A]); + assert_encode_size_agrees(&req); + } + + #[test] + fn encode_single_param_subfunction() { + // 0x02 ReportDTC_ByStatusMask(mask). DTCStatusMask is 1 byte. + let mask = DTCStatusMask::from(0xFF); + let req = ReadDTCInfoRequest::new(ReadDTCInfoSubFunction::ReportDTC_ByStatusMask(mask)); + let mut buf = [0u8; 8]; + let written = Encode::encode(&req, &mut buf.as_mut_slice()).unwrap(); + assert_eq!(&buf[..written], &[0x02, 0xFF]); + assert_encode_size_agrees(&req); + } + + #[test] + fn encode_multi_param_subfunction() { + // 0x42 ReportWWHOBDDTC_ByMaskRecord(group, status, severity). + let req = ReadDTCInfoRequest::new(ReadDTCInfoSubFunction::ReportWWHOBDDTC_ByMaskRecord( + FunctionalGroupIdentifier::EmissionsSystemGroup, + DTCStatusMask::from(0x08), + DTCSeverityMask::CheckImmediately, + )); + let mut buf = [0u8; 8]; + let written = Encode::encode(&req, &mut buf.as_mut_slice()).unwrap(); + assert_eq!(&buf[..written], &[0x42, 0x33, 0x08, 0b1000_0000]); + assert_encode_size_agrees(&req); + } + + #[test] + fn encode_reserved_subfunction() { + // ISOSAEReserved carries the sub-function byte itself, no params. + let req = ReadDTCInfoRequest::new(ReadDTCInfoSubFunction::ISOSAEReserved(0x57)); + let mut buf = [0u8; 8]; + let written = Encode::encode(&req, &mut buf.as_mut_slice()).unwrap(); + assert_eq!(&buf[..written], &[0x57]); + assert_encode_size_agrees(&req); + } +} + /// A DTC paired with its fault detection counter value #[cfg_attr(feature = "serde", derive(serde::Deserialize, serde::Serialize))] #[cfg_attr(feature = "utoipa", derive(utoipa::ToSchema))] @@ -198,6 +259,114 @@ impl ReadDTCInfoSubFunction { } } +impl Encode for ReadDTCInfoSubFunction { + fn encoded_size(&self) -> usize { + use ReadDTCInfoSubFunction as S; + 1 + match self { + S::ReportNumberOfDTC_ByStatusMask(m) + | S::ReportDTC_ByStatusMask(m) + | S::ReportUserDefMemoryDTC_ByStatusMask(m) => m.encoded_size(), + S::ReportDTCSnapshotRecord_ByDTCNumber(r, n) => r.encoded_size() + n.encoded_size(), + S::ReportDTCStoredData_ByRecordNumber(n) => n.encoded_size(), + S::ReportDTCExtDataRecord_ByDTCNumber(r, n) => r.encoded_size() + n.encoded_size(), + S::ReportNumberOfDTC_BySeverityMaskRecord(s, m) + | S::ReportDTC_BySeverityMaskRecord(s, m) => s.encoded_size() + m.encoded_size(), + S::ReportSeverityInfoOfDTC(r) => r.encoded_size(), + S::ReportDTCExtDataRecord_ByRecordNumber(n) | S::ReportSupportedDTCExtDataRecord(n) => { + n.encoded_size() + } + S::ReportUserDefMemoryDTCSnapshotRecord_ByDTCNumber(r, n, mem) => { + r.encoded_size() + n.encoded_size() + mem.encoded_size() + } + S::ReportUserDefMemoryDTCExtDataRecord_ByDTCNumber(r, n, mem) => { + r.encoded_size() + n.encoded_size() + mem.encoded_size() + } + S::ReportWWHOBDDTC_ByMaskRecord(g, m, s) => { + g.encoded_size() + m.encoded_size() + s.encoded_size() + } + S::ReportWWHOBDDTC_WithPermanentStatus(g) => g.encoded_size(), + S::ReportDTCInformation_ByDTCReadinessGroupIdentifier(g, rg) => { + g.encoded_size() + rg.encoded_size() + } + S::ReportDTCSnapshotIdentification + | S::ReportSupportedDTC + | S::ReportFirstTestFailedDTC + | S::ReportFirstConfirmedDTC + | S::ReportMostRecentTestFailedDTC + | S::ReportMostRecentConfirmedDTC + | S::ReportDTCFaultDetectionCounter + | S::ReportDTCWithPermanentStatus + | S::ISOSAEReserved(_) => 0, + } + } + + fn encode(&self, writer: &mut impl embedded_io::Write) -> Result { + use ReadDTCInfoSubFunction as S; + writer.write_all(&[self.value()]).map_err(Error::io)?; + match self { + S::ReportNumberOfDTC_ByStatusMask(m) + | S::ReportDTC_ByStatusMask(m) + | S::ReportUserDefMemoryDTC_ByStatusMask(m) => { + m.encode(writer)?; + } + S::ReportDTCSnapshotRecord_ByDTCNumber(r, n) => { + r.encode(writer)?; + n.encode(writer)?; + } + S::ReportDTCStoredData_ByRecordNumber(n) => { + n.encode(writer)?; + } + S::ReportDTCExtDataRecord_ByDTCNumber(r, n) => { + r.encode(writer)?; + n.encode(writer)?; + } + S::ReportNumberOfDTC_BySeverityMaskRecord(s, m) + | S::ReportDTC_BySeverityMaskRecord(s, m) => { + s.encode(writer)?; + m.encode(writer)?; + } + S::ReportSeverityInfoOfDTC(r) => { + r.encode(writer)?; + } + S::ReportDTCExtDataRecord_ByRecordNumber(n) | S::ReportSupportedDTCExtDataRecord(n) => { + n.encode(writer)?; + } + S::ReportUserDefMemoryDTCSnapshotRecord_ByDTCNumber(r, n, mem) => { + r.encode(writer)?; + n.encode(writer)?; + mem.encode(writer)?; + } + S::ReportUserDefMemoryDTCExtDataRecord_ByDTCNumber(r, n, mem) => { + r.encode(writer)?; + n.encode(writer)?; + mem.encode(writer)?; + } + S::ReportWWHOBDDTC_ByMaskRecord(g, m, s) => { + g.encode(writer)?; + m.encode(writer)?; + s.encode(writer)?; + } + S::ReportWWHOBDDTC_WithPermanentStatus(g) => { + g.encode(writer)?; + } + S::ReportDTCInformation_ByDTCReadinessGroupIdentifier(g, rg) => { + g.encode(writer)?; + rg.encode(writer)?; + } + S::ReportDTCSnapshotIdentification + | S::ReportSupportedDTC + | S::ReportFirstTestFailedDTC + | S::ReportFirstConfirmedDTC + | S::ReportMostRecentTestFailedDTC + | S::ReportMostRecentConfirmedDTC + | S::ReportDTCFaultDetectionCounter + | S::ReportDTCWithPermanentStatus + | S::ISOSAEReserved(_) => {} + } + Ok(self.encoded_size()) + } +} + /// Same representation as [`DTCStatusMask`] but with the bits 'on' representing the DTC status supported by the server /// IE if the server doesn't support [`DTCStatusMask::WarningIndicatorRequested`] then the bit for that status will be 'off' /// and all other bits will be 'on' From 0b0c4744dbf02b4206835c0450f5917e171bdbf8 Mon Sep 17 00:00:00 2001 From: Zach Heylmun Date: Wed, 3 Jun 2026 15:29:35 -0400 Subject: [PATCH 49/58] add Decode for WriteDataByIdentifierResponse (2-byte round-trip) --- src/services/write_data_by_identifier.rs | 29 +++++++++++++++++++++++- 1 file changed, 28 insertions(+), 1 deletion(-) diff --git a/src/services/write_data_by_identifier.rs b/src/services/write_data_by_identifier.rs index 0563409..755d9ad 100644 --- a/src/services/write_data_by_identifier.rs +++ b/src/services/write_data_by_identifier.rs @@ -1,5 +1,5 @@ //! `WriteDataByIdentifier` (0x2E) service implementation -use crate::{Encode, Error, NegativeResponseCode}; +use crate::{Decode, Encode, Error, NegativeResponseCode}; const WRITE_DID_NEGATIVE_RESPONSE_CODES: [NegativeResponseCode; 5] = [ NegativeResponseCode::IncorrectMessageLengthOrInvalidFormat, @@ -77,6 +77,16 @@ impl Encode for WriteDataByIdentifierResponse { } } +impl<'a> Decode<'a> for WriteDataByIdentifierResponse { + fn decode(buf: &'a [u8]) -> Result<(Self, &'a [u8]), Error> { + if buf.len() < 2 { + return Err(Error::InsufficientData(2)); + } + let identifier = u16::from_be_bytes([buf[0], buf[1]]); + Ok((Self { identifier }, &buf[2..])) + } +} + #[cfg(test)] mod test { use super::*; @@ -104,4 +114,21 @@ mod test { assert_eq!(&buf[..3], &[0xF1, 0x86, 0x01]); assert_encode_size_agrees(&request); } + + #[test] + fn write_response_roundtrip() { + let response = WriteDataByIdentifierResponse::new(0xF186); + let mut buf = [0u8; 4]; + let written = Encode::encode(&response, &mut buf.as_mut_slice()).unwrap(); + let (decoded, rest) = + ::decode(&buf[..written]).unwrap(); + assert_eq!(decoded, response); + assert!(rest.is_empty()); + } + + #[test] + fn write_response_decode_rejects_short_buffer() { + let err = ::decode(&[0x01]); + assert!(matches!(err, Err(Error::InsufficientData(2)))); + } } From 4dbdb1c7f63fe6e6ac21ecc139f47c81fdc22cf0 Mon Sep 17 00:00:00 2001 From: Zach Heylmun Date: Wed, 3 Jun 2026 15:38:32 -0400 Subject: [PATCH 50/58] add crate-root integration tests for completed descriptor types --- src/lib.rs | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+) diff --git a/src/lib.rs b/src/lib.rs index 426ec2e..51c3faa 100644 --- a/src/lib.rs +++ b/src/lib.rs @@ -245,6 +245,31 @@ mod no_std_api_tests { assert_eq!(&buf[..written], &wire); } + #[test] + fn read_dtc_info_request_encodes_through_public_api() { + // Public-surface construction: types reached via crate root, not common::/services::. + let req = ReadDTCInfoRequest::new(ReadDTCInfoSubFunction::ReportDTC_ByStatusMask( + DTCStatusMask::from(0xFF), + )); + let mut buf = [0u8; 8]; + let written = Encode::encode(&req, &mut buf.as_mut_slice()).unwrap(); + // sub=0x02 ReportDTC_ByStatusMask, mask=0xFF + assert_eq!(&buf[..written], &[0x02, 0xFF]); + assert_eq!(written, req.encoded_size()); + } + + #[test] + fn write_data_by_identifier_response_roundtrips_through_public_api() { + // Reachability check: the WDBI response codec works through the crate-root public API. + let resp = WriteDataByIdentifierResponse::new(0xBEEF); + let mut buf = [0u8; 4]; + let written = Encode::encode(&resp, &mut buf.as_mut_slice()).unwrap(); + let (decoded, remainder) = + ::decode(&buf[..written]).unwrap(); + assert_eq!(decoded, resp); + assert!(remainder.is_empty()); + } + #[test] fn const_construction() { // Verify const construction works at compile time From a546d329885f41f11031b23f4eac071296ca07e9 Mon Sep 17 00:00:00 2001 From: Zach Heylmun Date: Wed, 3 Jun 2026 16:05:53 -0400 Subject: [PATCH 51/58] add API consistency Phase 2 design doc Resolves the Phase 2 open questions: suffix-marks-asymmetry naming rule, wrapping descriptors into the Request/Response enums (RDBI excepted), variable-length integer codec dedup, and primitive macro merge. --- ...026-06-03-api-consistency-phase2-design.md | 201 ++++++++++++++++++ 1 file changed, 201 insertions(+) create mode 100644 docs/superpowers/specs/2026-06-03-api-consistency-phase2-design.md diff --git a/docs/superpowers/specs/2026-06-03-api-consistency-phase2-design.md b/docs/superpowers/specs/2026-06-03-api-consistency-phase2-design.md new file mode 100644 index 0000000..b08fee6 --- /dev/null +++ b/docs/superpowers/specs/2026-06-03-api-consistency-phase2-design.md @@ -0,0 +1,201 @@ +# UDS Protocol — API Consistency Phase 2 Design + +**Date:** 2026-06-03 +**Branch:** `feature/no_std` +**Status:** Design — pending user review, then implementation plan +**Follows:** `2026-06-03-api-exposure-and-consistency-design.md` (Phase 1, landed). This resolves +the Phase 2 open questions recorded there. + +## Purpose + +Phase 1 made the public surface deliberate and completed the codec-incomplete descriptors. +Phase 2 finishes the cohesive breaking change by removing the remaining inconsistencies a +reviewer sees immediately: + +1. The `…Tx`/`…Rx` suffixes mislead — most "Tx" descriptors are actually bidirectional + (they implement both `Encode` and `Decode` and appear in both the `Request` and + `Response` enums). +2. The dispatch enums model the same class of service two different ways — some variants wrap + a named descriptor type, others hold a bare `&[u8]` or inline fields. +3. The variable-length big-endian integer codec is hand-rolled in ~5 places. +4. Two byte-identical primitive macros exist where one would do. + +All of this lands on `feature/no_std` so the entire breaking change ships together. + +## Guiding principle (unchanged) + +Concrete types, no generics, no user-supplied types. Lightweight typed descriptors that +faithfully model the ISO-14229 message elements on TX; borrowed slices / lazy iterators for +variable-length RX sequences. Simplicity for C developers new to Rust is a first-class goal — +which is why the naming rule below removes the `Tx`/`Rx` jargon everywhere it is not +load-bearing. + +--- + +## Decision 1 — Suffix marks asymmetry, not direction + +**Rule:** a `…Tx` or `…Rx` suffix is used **only** when a service's TX and RX representations +are genuinely different types. A type that is bidirectional (implements both `Encode` and +`Decode`, and is used on both the request-building and response-parsing paths) takes **no +suffix** and reads as plain `FooRequest` / `FooResponse`. The `<'a>` lifetime already signals +that a type borrows from the wire buffer. + +**Renames (all verified bidirectional — they implement both `Encode` and `Decode`):** + +| Current | New | +|---|---| +| `SecurityAccessRequestTx` | `SecurityAccessRequest` | +| `SecurityAccessResponseTx` | `SecurityAccessResponse` | +| `TransferDataRequestTx` | `TransferDataRequest` | +| `TransferDataResponseTx` | `TransferDataResponse` | +| `RequestFileTransferRequestTx` | `RequestFileTransferRequest` | +| `RequestFileTransferResponseTx` | `RequestFileTransferResponse` | +| `RequestDownloadResponseTx` | `RequestDownloadResponse` | +| `RoutineControlRequestTx` | `RoutineControlRequest` | +| `RoutineControlResponseTx` | `RoutineControlResponse` | +| `WriteDataByIdentifierRequestTx` | `WriteDataByIdentifierRequest` | +| `ReadDTCInfoResponseRx` | `ReadDTCInfoResponse` | +| `NamePayloadTx` | `NamePayload` | +| `SentDataPayloadTx` | `SentDataPayload` | + +**Keeps its suffix — the single genuine asymmetry:** `ReadDataByIdentifierRequestTx` +(`&[u16]` DID list on TX; the wire cannot be reinterpreted as `&[u16]` zero-copy, so RX is +raw `&[u8]`). + +Already correctly unsuffixed and unchanged: `RequestDownloadRequest`, +`WriteDataByIdentifierResponse`, `ReadDTCInfoRequest`, `PositionPayload`, `SizePayload`, +`FileSizePayload`, `DirSizePayload`, `FileOperationMode`, and all fixed-size service types. + +All renames must update the explicit crate-root re-export lists in `src/lib.rs` (from Phase 1) +and every doc-comment reference. + +## Decision 2 — Wrap descriptors in the enums where feasible + +Each modeled `Request`/`Response` variant wraps a single named descriptor type wherever a +zero-copy decode allows it, replacing bare `&[u8]` and inline-field variants. This eliminates +the orphaned descriptor types (the enums now construct them) and makes the variants +round-trippable. + +| Variant | Before | After | Decode work | +|---|---|---|---| +| `Request::WriteDataByIdentifier` | `(&[u8])` | `(WriteDataByIdentifierRequest)` | add trivial `Decode` (borrow whole payload) | +| `Request::ReadDTCInfo` | `(&[u8])` | `(ReadDTCInfoRequest)` | add **25-variant `Decode`** (inverse of Phase 1 `Encode`) | +| `Request::RoutineControl` | `{ sub_function: u8, raw_payload: &[u8] }` | `(RoutineControlRequest)` | add `Decode` via `SuppressablePositiveResponse` + borrowed payload (see below) | +| `Response::WriteDataByIdentifier` | `(&[u8])` | `(WriteDataByIdentifierResponse)` | `Decode` already added in Phase 1 | +| `Response::RoutineControl` | `{ routine_control_type: u8, raw_status_record: &[u8] }` | `(RoutineControlResponse)` | add `Decode` | + +**RDBI is the documented exception.** `Request::ReadDataByIdentifier(&[u8])` and +`Response::ReadDataByIdentifier(&[u8])` stay raw, because the DID list cannot be produced as +`&[u16]` zero-copy. `ReadDataByIdentifierRequestTx` remains a TX-only build/encode helper. + +The `Request`/`Response` `Encode`/`encoded_size`/`service`/`response_sid` match arms and +`is_positive_response_suppressed` are updated for the new variant shapes. + +### Sub-function byte fidelity (resolved) + +The wire sub-function byte for RoutineControl carries the SPRMIB suppress bit (`0x80`) in its +high bit and the `routineControlType` in the low 7 bits. RoutineControl is modeled exactly +like every other sub-function service (`EcuResetRequest` is the template), using the existing +internal `SuppressablePositiveResponse` wrapper: + +```rust +pub struct RoutineControlRequest<'d> { + sub_function: SuppressablePositiveResponse, + raw_payload: &'d [u8], +} +``` + +`RoutineControlSubFunction` already satisfies the wrapper's bounds (`TryFrom` ++ `From<…> for u8`). On decode, `SuppressablePositiveResponse::try_from(payload[0])?` splits the +byte into `(suppress_flag, RoutineControlSubFunction::try_from(byte & 0x7F))`; on encode, +`u8::from(self.sub_function)` re-applies the bit — so the suppress bit round-trips losslessly. +Following the `EcuResetRequest` pattern, the `SuppressablePositiveResponse` field is private +(the type stays `pub(crate)`); the public surface is +`new(suppress_positive_response: bool, sub_function: RoutineControlSubFunction, raw_payload: &'d [u8])` +plus `suppress_positive_response()`, `sub_function()`, and `raw_payload()` getters. + +This also lets `Request::is_positive_response_suppressed()` forward to RoutineControl (today it +falls through to `false`). + +`RoutineControlResponse.routine_control_type` is a plain `RoutineControlSubFunction` (responses +never carry the SPRMIB bit — a suppressed request produces no positive response), mirroring how +`EcuResetResponse` holds a plain `ResetType`. + +**One intentional behavior change:** the typed form rejects reserved `routineControlType` values +(low 7 bits outside 0x01–0x03) on decode with `IncorrectMessageLengthOrInvalidFormat`, where the +old raw-`u8` variant accepted any byte. ISO defines only 0x01–0x03, and every sibling +sub-function service already rejects unknown values, so this makes RoutineControl consistent. +A round-trip test with the suppress bit set (e.g. `0x81`) locks the fidelity in. + +## Decision 3 — Deduplicate the variable-length big-endian integer codec + +The pattern +`let mut b = [0u8; N]; b[N-n..].copy_from_slice(&src[..n]); T::from_be_bytes(b)` (and its +`to_be_bytes()[N-n..]` encode twin) is duplicated across `SizePayload`, `FileSizePayload`, +`DirSizePayload` (`request_file_transfer.rs`) and `RequestDownloadRequest` +(`request_download.rs`). + +**Action:** add one concrete, non-generic helper pair to `src/common/util.rs`: + +- `read_be_uint(src: &[u8], n: usize) -> Result` — left-pads `n` big-endian + bytes into a `u128`; returns `Error::InsufficientData(n)` when `src.len() < n`, and rejects + `n > 16`. +- `write_be_uint(value: u128, n: usize, writer: &mut impl embedded_io::Write) -> Result` + — writes the low `n` big-endian bytes of `value`. + +`u128` is the widest case, so the `u64`/`u32` call sites (`RequestDownloadRequest`) cast down +from the returned `u128` (`as u64` / `as u32`). No generics — one concrete pair serves every +site. Whether these helpers are part of the public API or `pub(crate)` is settled in the plan +(default: `pub(crate)`, since they are an internal codec detail). + +## Decision 4 — Merge the duplicate primitive macros + +`unsigned_primitive_encode_decode!` and `signed_primitive_encode_decode!` in +`src/common/primitive_generics.rs` have byte-identical bodies (both use `to_be_bytes` / +`from_be_bytes`). Merge into a single `primitive_encode_decode!` macro invoked once with all +ten integer types (`u8, u16, u32, u64, u128, i8, i16, i32, i64, i128`). + +--- + +## Components touched + +- `src/lib.rs` — update explicit re-export lists for renamed types. +- `src/services/security_access.rs`, `transfer_data.rs`, `request_file_transfer.rs`, + `request_download.rs`, `routine_control.rs`, `write_data_by_identifier.rs`, + `read_dtc_information.rs` — type renames; add `Decode` impls where Decision 2 requires; + call the new `read_be_uint`/`write_be_uint` helpers. +- `src/request.rs` / `src/response.rs` — rewire the four+ variants to wrap descriptors; update + all match arms; rename referenced types. +- `src/common/util.rs` — add `read_be_uint` / `write_be_uint`. +- `src/common/primitive_generics.rs` — merge the two macros. + +## Testing + +- Round-trip (`Request`/`Response` `decode` → `encode` → bytes identical) for every + newly-wrapped variant: `WriteDataByIdentifier` (req & resp), `ReadDTCInfo` (req), + `RoutineControl` (req & resp). +- A `RoutineControl` round-trip with the SPRMIB suppress bit set, asserting the byte survives. +- `assert_encode_size_agrees` on every new/changed `Encode` impl. +- Unit tests for `read_be_uint`/`write_be_uint` (including `n=0`, max width, and + `InsufficientData`), and confirmation the refactored payload decoders still pass their + existing round-trip tests. +- Full CI matrix green: default (`std`), `--no-default-features --features alloc`, + `--no-default-features`, `thumbv6m-none-eabi`; clippy clean on all host combos; `fmt` clean. + +## Out of scope + +- Implementing additional UDS services (still reached via `Other`). +- Any transport, session, or async layer. +- Merging `feature/no_std` to `main` — happens after Phase 2 lands, as the full cohesive + breaking change. + +## Risks + +- **Broad rename churn.** 13 renamed types ripple across services, the enums, re-exports, + tests, and docs. Mitigated by no external in-tree consumers and a green CI matrix; a final + grep for the old names confirms none remain. +- **`ReadDTCInfoRequest::Decode` correctness across 25 variants.** Mitigated by per-variant + round-trip tests reusing the Phase 1 `Encode` as the oracle (encode a known value, decode it + back, assert equality). +- **Routine-control sub-function byte regression.** Explicitly guarded by the SPRMIB round-trip + test (Decision 2). From bff65ab32e86275d02c9db7f556161098fdd14b4 Mon Sep 17 00:00:00 2001 From: Zach Heylmun Date: Wed, 3 Jun 2026 17:16:47 -0400 Subject: [PATCH 52/58] add Phase 2 implementation plan (API consistency) --- .../2026-06-03-api-consistency-phase2.md | 862 ++++++++++++++++++ 1 file changed, 862 insertions(+) create mode 100644 docs/superpowers/plans/2026-06-03-api-consistency-phase2.md diff --git a/docs/superpowers/plans/2026-06-03-api-consistency-phase2.md b/docs/superpowers/plans/2026-06-03-api-consistency-phase2.md new file mode 100644 index 0000000..38104ce --- /dev/null +++ b/docs/superpowers/plans/2026-06-03-api-consistency-phase2.md @@ -0,0 +1,862 @@ +# API Consistency — Phase 2 Implementation Plan + +> **For agentic workers:** REQUIRED SUB-SKILL: Use superpowers:subagent-driven-development (recommended) or superpowers:executing-plans to implement this plan task-by-task. Steps use checkbox (`- [ ]`) syntax for tracking. + +**Goal:** Finish the cohesive no_std breaking change: drop the misleading `…Tx`/`…Rx` suffixes from bidirectional descriptor types, wrap the remaining raw enum variants in their descriptors (RDBI excepted), and remove the duplicated variable-length integer codec and the duplicate primitive macros. + +**Architecture:** Seven commits. (1) Rename 13 bidirectional types (drop suffix). (2) Extract a `read_be_uint`/`write_be_uint` helper pair and use it at the 4 hand-rolled sites. (3) Merge the two identical primitive macros. (4) Wrap `WriteDataByIdentifier` (req + resp) in the enums. (5) Wrap `RoutineControl` (req + resp) using `SuppressablePositiveResponse`. (6) Add `Decode` to 5 DTC parameter types + a 25-variant `ReadDTCInfoRequest::Decode`, and wrap `Request::ReadDTCInfo`. (7) Full-matrix verification. + +**Tech Stack:** Rust, no_std + no_alloc, `embedded_io::Write` for encode, borrowed `&[u8]` for decode. Spec: `docs/superpowers/specs/2026-06-03-api-consistency-phase2-design.md`. + +--- + +## Conventions for every task + +- Local per-task verification: `cargo test --all-features` (fast host run). +- Commit message format: + ``` + + + Co-Authored-By: Claude Opus 4.8 + ``` +- Platform is macOS: in-place `sed` requires `sed -i ''`. + +--- + +## Task 1: Rename bidirectional descriptor types (drop `…Tx`/`…Rx`) + +Pure mechanical rename across the crate. The compiler + a final grep are the safety net. `ReadDataByIdentifierRequestTx` is **NOT** renamed (it is the one genuinely TX-only type). + +**Files:** all of `src/` (and a README check). + +- [ ] **Step 1: Apply the renames** + +Each old name is a full unique identifier, so a global text replace is safe. Run these from the repo root (the trailing `''` after `-i` is required on macOS): + +```bash +cd /Users/zacharyheylmun/dev/rust/uds_protocol +for pair in \ + "SecurityAccessRequestTx:SecurityAccessRequest" \ + "SecurityAccessResponseTx:SecurityAccessResponse" \ + "TransferDataRequestTx:TransferDataRequest" \ + "TransferDataResponseTx:TransferDataResponse" \ + "RequestFileTransferRequestTx:RequestFileTransferRequest" \ + "RequestFileTransferResponseTx:RequestFileTransferResponse" \ + "RequestDownloadResponseTx:RequestDownloadResponse" \ + "RoutineControlRequestTx:RoutineControlRequest" \ + "RoutineControlResponseTx:RoutineControlResponse" \ + "WriteDataByIdentifierRequestTx:WriteDataByIdentifierRequest" \ + "ReadDTCInfoResponseRx:ReadDTCInfoResponse" \ + "NamePayloadTx:NamePayload" \ + "SentDataPayloadTx:SentDataPayload" ; do + old="${pair%%:*}"; new="${pair##*:}" + grep -rl "$old" src README.md | xargs sed -i '' "s/${old}/${new}/g" +done +``` + +Note: the order matters only for substrings; none of these old names is a substring of another old name, so order is irrelevant here. `ReadDataByIdentifierRequestTx` contains none of the above as a substring, so it is untouched. + +- [ ] **Step 2: Verify no old names remain (except the intentional one)** + +```bash +grep -rn "RequestTx\|ResponseTx\|ResponseRx\|PayloadTx" src README.md +``` +Expected: only `ReadDataByIdentifierRequestTx` matches. If any other old name appears, the rename missed a spot — re-run the relevant replacement. + +- [ ] **Step 3: Build + test + fmt** + +Run: +```bash +cargo build --all-features +cargo test --all-features +cargo fmt -- --check +``` +Expected: PASS. (`cargo fmt` may reflow the now-shorter names in `use` lists; run `cargo fmt` if `--check` complains.) + +- [ ] **Step 4: Commit** + +```bash +git add -A +git commit -m "$(printf 'rename bidirectional descriptor types: drop misleading Tx/Rx suffixes\n\nCo-Authored-By: Claude Opus 4.8 ')" +``` + +--- + +## Task 2: Deduplicate the variable-length big-endian integer codec + +Add one concrete helper pair to `src/common/util.rs` (kept `pub(crate)`) and call it from the four hand-rolled sites. + +**Files:** +- Modify: `src/common/util.rs` +- Modify: `src/services/request_file_transfer.rs` (`SizePayload`, `FileSizePayload`, `DirSizePayload`) +- Modify: `src/services/request_download.rs` (`RequestDownloadRequest`) + +- [ ] **Step 1: Write failing tests for the helpers** + +In `src/common/util.rs`, inside the existing `#[cfg(test)] mod tests`, add: + +```rust + #[test] + fn be_uint_roundtrip() { + use crate::common::util::{read_be_uint, write_be_uint}; + let mut buf = [0u8; 16]; + let mut w = buf.as_mut_slice(); + let written = write_be_uint(0x00AB_CDEFu128, 3, &mut w).unwrap(); + assert_eq!(written, 3); + assert_eq!(&buf[..3], &[0xAB, 0xCD, 0xEF]); + let v = read_be_uint(&buf[..3], 3).unwrap(); + assert_eq!(v, 0x00AB_CDEF); + } + + #[test] + fn be_uint_zero_width() { + use crate::common::util::{read_be_uint, write_be_uint}; + let mut buf = [0u8; 4]; + let mut w = buf.as_mut_slice(); + assert_eq!(write_be_uint(0, 0, &mut w).unwrap(), 0); + assert_eq!(read_be_uint(&[], 0).unwrap(), 0); + } + + #[test] + fn read_be_uint_rejects_short_and_overwide() { + use crate::common::util::read_be_uint; + assert!(read_be_uint(&[0x01], 2).is_err()); + assert!(read_be_uint(&[0u8; 17], 17).is_err()); + } +``` + +- [ ] **Step 2: Run to verify they fail** + +Run: `cargo test --all-features be_uint` +Expected: FAIL (helpers don't exist). + +- [ ] **Step 3: Implement the helpers** + +At the top of `src/common/util.rs`, add the import and helpers (place above the existing `param_length_*` functions): + +```rust +use crate::Error; + +/// Maximum width of a big-endian unsigned integer this codec handles. +const BE_UINT_MAX_BYTES: usize = 16; + +/// Read the first `n` big-endian bytes of `src` as a left-padded `u128`. +/// +/// # Errors +/// Returns [`Error::InsufficientData`] if `src` is shorter than `n`, or +/// [`Error::IncorrectMessageLengthOrInvalidFormat`] if `n > 16`. +pub(crate) fn read_be_uint(src: &[u8], n: usize) -> Result { + if n > BE_UINT_MAX_BYTES { + return Err(Error::IncorrectMessageLengthOrInvalidFormat); + } + if src.len() < n { + return Err(Error::InsufficientData(n)); + } + let mut bytes = [0u8; BE_UINT_MAX_BYTES]; + bytes[BE_UINT_MAX_BYTES - n..].copy_from_slice(&src[..n]); + Ok(u128::from_be_bytes(bytes)) +} + +/// Write the low `n` big-endian bytes of `value` to `writer`, returning `n`. +/// +/// # Errors +/// Returns [`Error::IncorrectMessageLengthOrInvalidFormat`] if `n > 16`, or +/// [`Error::IoError`] if the writer fails. +pub(crate) fn write_be_uint( + value: u128, + n: usize, + writer: &mut impl embedded_io::Write, +) -> Result { + if n > BE_UINT_MAX_BYTES { + return Err(Error::IncorrectMessageLengthOrInvalidFormat); + } + let bytes = value.to_be_bytes(); + writer + .write_all(&bytes[BE_UINT_MAX_BYTES - n..]) + .map_err(Error::io)?; + Ok(n) +} +``` + +- [ ] **Step 4: Route the helpers through `common/mod.rs`** + +In `src/common/mod.rs`, the `mod util;` line is followed by a `pub use util::{param_length_*}`. Add the new helpers to the crate-internal surface by changing that line's neighbours to also re-export them `pub(crate)`: + +```rust +mod util; +pub use util::{param_length_u16, param_length_u32, param_length_u64, param_length_u128}; +pub(crate) use util::{read_be_uint, write_be_uint}; +``` + +- [ ] **Step 5: Use the helpers in `request_file_transfer.rs`** + +Add `use crate::common::{read_be_uint, write_be_uint};` to the imports. Then: + +In `impl Encode for SizePayload`, replace the two `uncompressed`/`compressed` `to_be_bytes()` + `write_all(&…[U128_MAX_BYTES - n..])` blocks with: +```rust + write_be_uint(self.file_size_uncompressed, n, writer)?; + write_be_uint(self.file_size_compressed, n, writer)?; +``` +(keep the `file_size_parameter_length` byte write before them, and the `n > U128_MAX_BYTES` guard.) + +In `impl Decode for SizePayload`, replace the `u_bytes`/`c_bytes` blocks with: +```rust + let file_size_uncompressed = read_be_uint(&buf[1..], n)?; + let file_size_compressed = read_be_uint(&buf[1 + n..], n)?; +``` +and use those in the returned `Self`. + +In `impl Encode for FileSizePayload`, replace the two write blocks with the same two `write_be_uint(... n ...)` calls. In `impl Decode for FileSizePayload`, replace the `u_bytes`/`c_bytes` blocks with: +```rust + let file_size_uncompressed = read_be_uint(&buf[2..], n)?; + let file_size_compressed = read_be_uint(&buf[2 + n..], n)?; +``` + +In `impl Encode for DirSizePayload`, replace the single `bytes` write block with `write_be_uint(self.dir_info_length, n, writer)?;`. In `impl Decode for DirSizePayload`, replace the `bytes` block with `let dir_info_length = read_be_uint(&buf[2..], n)?;`. + +Keep every existing length/`total` bounds check and `n > U128_MAX_BYTES` guard exactly as-is; only the padding+convert lines change. `U128_MAX_BYTES` may now be unused — if the compiler warns, remove the `const U128_MAX_BYTES` definition. + +- [ ] **Step 6: Use the helpers in `request_download.rs`** + +Add `use crate::common::{read_be_uint, write_be_uint};` to the imports. + +In `impl Encode for RequestDownloadRequest::encode`, replace the `addr_bytes`/`size_bytes` blocks with: +```rust + write_be_uint(u128::from(self.memory_address), addr_len, writer)?; + write_be_uint(u128::from(self.memory_size), size_len, writer)?; +``` +where `addr_len` / `size_len` are the existing `memory_address_length` / `memory_size_length` reads. + +In `impl Decode`, replace the `addr_bytes`/`size_bytes` blocks with: +```rust + let memory_address = read_be_uint(&buf[2..], addr_len)? as u64; + let memory_size = read_be_uint(&buf[2 + addr_len..], size_len)? as u32; +``` +Keep the `total` bounds check. Add `#[allow(clippy::cast_possible_truncation)]` on the `decode` fn if clippy flags the `as u64`/`as u32` (the widths are bounded by the format nibble, ≤8 and ≤4). + +- [ ] **Step 7: Verify and commit** + +Run: `cargo test --all-features && cargo clippy --all-features && cargo fmt` +Expected: PASS, clippy clean. The existing payload round-trip tests must still pass. +```bash +git add -A +git commit -m "$(printf 'dedup variable-length big-endian integer codec into util helpers\n\nCo-Authored-By: Claude Opus 4.8 ')" +``` + +--- + +## Task 3: Merge the duplicate primitive macros + +**Files:** `src/common/primitive_generics.rs` + +- [ ] **Step 1: Replace the two macros with one** + +Replace the entire contents of `src/common/primitive_generics.rs` (both `unsigned_primitive_encode_decode!` and `signed_primitive_encode_decode!` definitions and their two invocations) with a single macro and one invocation: + +```rust +use crate::{Decode, Encode, Error}; + +/// Implement [`Encode`] and [`Decode`] for integer primitives (no_std-compatible). +macro_rules! primitive_encode_decode { + ( $($primitive:ty), * ) => { + $( + impl Encode for $primitive { + fn encoded_size(&self) -> usize { + core::mem::size_of::<$primitive>() + } + fn encode(&self, writer: &mut impl embedded_io::Write) -> Result { + writer.write_all(&self.to_be_bytes()).map_err(Error::io)?; + Ok(self.encoded_size()) + } + } + impl<'a> Decode<'a> for $primitive { + fn decode(buf: &'a [u8]) -> Result<(Self, &'a [u8]), Error> { + const SIZE: usize = core::mem::size_of::<$primitive>(); + if buf.len() < SIZE { + return Err(Error::InsufficientData(SIZE)); + } + let (head, tail) = buf.split_at(SIZE); + let value = <$primitive>::from_be_bytes(head.try_into().unwrap()); + Ok((value, tail)) + } + } + )* + }; +} + +primitive_encode_decode!(u8, u16, u32, u64, u128, i8, i16, i32, i64, i128); +``` + +- [ ] **Step 2: Verify and commit** + +Run: `cargo test --all-features && cargo clippy --all-features && cargo fmt -- --check` +Expected: PASS (same 10 impls as before, generated by one macro). +```bash +git add src/common/primitive_generics.rs +git commit -m "$(printf 'merge identical signed/unsigned primitive codec macros\n\nCo-Authored-By: Claude Opus 4.8 ')" +``` + +--- + +## Task 4: Wrap `WriteDataByIdentifier` in the enums + +**Files:** +- Modify: `src/services/write_data_by_identifier.rs` (add `Decode` for `WriteDataByIdentifierRequest`) +- Modify: `src/request.rs`, `src/response.rs` + +- [ ] **Step 1: Write a failing round-trip test** + +In `src/request.rs` `mod tests` (create the test fn alongside existing ones), add: +```rust + #[test] + fn write_data_by_identifier_request_roundtrips() { + // SID 0x2E, DID 0xF190, one data byte 0x01 + let wire = [0x2E, 0xF1, 0x90, 0x01]; + let (req, rest) = Request::decode(&wire).unwrap(); + assert!(rest.is_empty()); + assert!(matches!(req, Request::WriteDataByIdentifier(_))); + let mut buf = [0u8; 8]; + let written = Encode::encode(&req, &mut buf.as_mut_slice()).unwrap(); + assert_eq!(&buf[..written], &wire); + } +``` + +- [ ] **Step 2: Run to verify it fails** + +Run: `cargo test --all-features write_data_by_identifier_request_roundtrips` +Expected: FAIL — `Request::WriteDataByIdentifier` still holds `&[u8]` (the `matches!` and/or type will mismatch once wired; before wiring it won't compile against the new variant). + +- [ ] **Step 3: Add `Decode` for `WriteDataByIdentifierRequest`** + +In `src/services/write_data_by_identifier.rs`, ensure `Decode` is imported (it is, from Phase 1). After the `impl Encode for WriteDataByIdentifierRequest` block add: +```rust +impl<'a> Decode<'a> for WriteDataByIdentifierRequest<'a> { + fn decode(buf: &'a [u8]) -> Result<(Self, &'a [u8]), Error> { + Ok((Self { payload: buf }, &[])) + } +} +``` + +- [ ] **Step 4: Rewire `Request::WriteDataByIdentifier`** + +In `src/request.rs`: +- Add `WriteDataByIdentifierRequest` to the `services::{…}` import. +- Change the variant from `WriteDataByIdentifier(&'a [u8])` to `WriteDataByIdentifier(WriteDataByIdentifierRequest<'a>)` and update its doc comment. +- In `decode`, change the arm to: + ```rust + UdsServiceType::WriteDataByIdentifier => Self::WriteDataByIdentifier( + ::decode_exact(payload)?, + ), + ``` +- In `encoded_size`, remove `WriteDataByIdentifier` from the grouped `ReadDataByIdentifier | WriteDataByIdentifier | ReadDTCInfo => bytes.len()` arm (leaving `ReadDataByIdentifier | ReadDTCInfo`) and add `Self::WriteDataByIdentifier(req) => req.encoded_size(),`. +- In `encode`, likewise split it out: remove from the grouped raw arm and add `Self::WriteDataByIdentifier(req) => req.encode(writer)?,`. +- `service` arm is unchanged (`Self::WriteDataByIdentifier(_) => …`, already ignores payload). + +- [ ] **Step 5: Rewire `Response::WriteDataByIdentifier`** + +In `src/response.rs`: +- Add `WriteDataByIdentifierResponse` to the crate imports. +- Change the variant from `WriteDataByIdentifier(&'a [u8])` to `WriteDataByIdentifier(WriteDataByIdentifierResponse)` and update its doc comment (note: `WriteDataByIdentifierResponse` is fixed-size, no lifetime). +- In `decode`, change the arm to: + ```rust + UdsServiceType::WriteDataByIdentifier => Self::WriteDataByIdentifier( + ::decode_exact(payload)?, + ), + ``` +- In `encoded_size`, remove `WriteDataByIdentifier` from the `ReadDataByIdentifier | WriteDataByIdentifier => bytes.len()` arm and add `Self::WriteDataByIdentifier(resp) => resp.encoded_size(),`. +- In `encode`, split it out the same way: `Self::WriteDataByIdentifier(resp) => resp.encode(writer)?,`. +- `response_sid` arm unchanged. + +- [ ] **Step 6: Run tests, add response round-trip, verify** + +Add to `src/response.rs` `mod tests`: +```rust + #[test] + fn write_data_by_identifier_response_roundtrips() { + // SID 0x6E, echoed DID 0xF190 + let wire = [0x6E, 0xF1, 0x90]; + let (resp, rest) = Response::decode(&wire).unwrap(); + assert!(rest.is_empty()); + let mut buf = [0u8; 8]; + let written = Encode::encode(&resp, &mut buf.as_mut_slice()).unwrap(); + assert_eq!(&buf[..written], &wire); + } +``` +Run: `cargo test --all-features && cargo clippy --all-features && cargo fmt` +Expected: PASS. + +- [ ] **Step 7: Commit** +```bash +git add -A +git commit -m "$(printf 'wrap WriteDataByIdentifier request/response in their descriptor types\n\nCo-Authored-By: Claude Opus 4.8 ')" +``` + +--- + +## Task 5: Wrap `RoutineControl` in the enums (with SPRMIB fidelity) + +**Files:** +- Modify: `src/services/routine_control.rs` (use `SuppressablePositiveResponse`; add `Decode` for both) +- Modify: `src/request.rs`, `src/response.rs` + +- [ ] **Step 1: Write failing round-trip tests (incl. suppress bit)** + +In `src/request.rs` `mod tests` add: +```rust + #[test] + fn routine_control_request_roundtrips_with_suppress_bit() { + // SID 0x31, sub 0x81 (StartRoutine + SPRMIB), RID 0xFF00, param 0xAA + let wire = [0x31, 0x81, 0xFF, 0x00, 0xAA]; + let (req, rest) = Request::decode(&wire).unwrap(); + assert!(rest.is_empty()); + assert!(req.is_positive_response_suppressed()); + let mut buf = [0u8; 8]; + let written = Encode::encode(&req, &mut buf.as_mut_slice()).unwrap(); + assert_eq!(&buf[..written], &wire); + } +``` +In `src/response.rs` `mod tests` add: +```rust + #[test] + fn routine_control_response_roundtrips() { + // SID 0x71, sub 0x01, RID 0xFF00, status 0x10 + let wire = [0x71, 0x01, 0xFF, 0x00, 0x10]; + let (resp, rest) = Response::decode(&wire).unwrap(); + assert!(rest.is_empty()); + let mut buf = [0u8; 8]; + let written = Encode::encode(&resp, &mut buf.as_mut_slice()).unwrap(); + assert_eq!(&buf[..written], &wire); + } +``` + +- [ ] **Step 2: Run to verify they fail** + +Run: `cargo test --all-features routine_control_request_roundtrips_with_suppress_bit routine_control_response_roundtrips` +Expected: FAIL (variants still hold inline fields; no `Decode`). + +- [ ] **Step 3: Rework `RoutineControlRequest` to use `SuppressablePositiveResponse`** + +In `src/services/routine_control.rs`, change the imports to: +```rust +use crate::common::SuppressablePositiveResponse; +use crate::{Decode, Encode, Error, RoutineControlSubFunction}; +``` +Replace the `RoutineControlRequest` struct + its `impl` + `impl Encode` with: +```rust +/// Used by a client to execute a defined sequence of events and obtain any relevant results. +/// +/// The payload is the routine identifier (2 bytes, big-endian) followed by any optional +/// routine input parameters, exactly as it appears on the wire after the sub-function byte. +#[derive(Clone, Copy, Debug, Eq, PartialEq)] +#[non_exhaustive] +pub struct RoutineControlRequest<'d> { + sub_function: SuppressablePositiveResponse, + raw_payload: &'d [u8], +} + +impl<'d> RoutineControlRequest<'d> { + /// Create a new `RoutineControlRequest`. + #[must_use] + pub const fn new( + suppress_positive_response: bool, + sub_function: RoutineControlSubFunction, + raw_payload: &'d [u8], + ) -> Self { + Self { + sub_function: SuppressablePositiveResponse::new(suppress_positive_response, sub_function), + raw_payload, + } + } + + /// Whether the server should suppress the positive response (SPRMIB). + #[must_use] + pub fn suppress_positive_response(&self) -> bool { + self.sub_function.suppress_positive_response() + } + + /// The routine control operation (start, stop, or request results). + #[must_use] + pub fn sub_function(&self) -> RoutineControlSubFunction { + self.sub_function.value() + } + + /// The raw payload bytes: routine identifier followed by optional parameters. + #[must_use] + pub const fn raw_payload(&self) -> &[u8] { + self.raw_payload + } +} + +impl Encode for RoutineControlRequest<'_> { + fn encoded_size(&self) -> usize { + 1 + self.raw_payload.len() + } + + fn encode(&self, writer: &mut impl embedded_io::Write) -> Result { + writer + .write_all(&[u8::from(self.sub_function)]) + .map_err(Error::io)?; + writer.write_all(self.raw_payload).map_err(Error::io)?; + Ok(self.encoded_size()) + } +} + +impl<'a> Decode<'a> for RoutineControlRequest<'a> { + fn decode(buf: &'a [u8]) -> Result<(Self, &'a [u8]), Error> { + if buf.is_empty() { + return Err(Error::InsufficientData(1)); + } + let sub_function = SuppressablePositiveResponse::try_from(buf[0])?; + Ok(( + Self { + sub_function, + raw_payload: &buf[1..], + }, + &[], + )) + } +} +``` + +- [ ] **Step 4: Add `Decode` for `RoutineControlResponse`** + +In the same file, leave the `RoutineControlResponse` struct and its `impl Encode` as renamed in Task 1 (public fields `routine_control_type: RoutineControlSubFunction`, `raw_status_record: &[u8]`), and add after its `impl Encode`: +```rust +impl<'a> Decode<'a> for RoutineControlResponse<'a> { + fn decode(buf: &'a [u8]) -> Result<(Self, &'a [u8]), Error> { + if buf.is_empty() { + return Err(Error::InsufficientData(1)); + } + let routine_control_type = RoutineControlSubFunction::try_from(buf[0])?; + Ok(( + Self { + routine_control_type, + raw_status_record: &buf[1..], + }, + &[], + )) + } +} +``` +Update the existing in-file `mod test` if it constructs `RoutineControlRequest` with the old public-field/`new(sub_function, payload)` signature — switch to `RoutineControlRequest::new(false, RoutineControlSubFunction::StartRoutine, &payload)`. + +- [ ] **Step 5: Rewire the enums** + +In `src/request.rs`: +- Add `RoutineControlRequest` to the `services::{…}` import. +- Change the variant from the `RoutineControl { sub_function: u8, raw_payload: &'a [u8] }` struct form to `RoutineControl(RoutineControlRequest<'a>)`; update its doc comment. +- `decode` arm becomes: + ```rust + UdsServiceType::RoutineControl => Self::RoutineControl( + ::decode_exact(payload)?, + ), + ``` + (delete the old manual `if payload.is_empty()` + field construction.) +- `encoded_size` arm: `Self::RoutineControl(req) => req.encoded_size(),` (remove the old `{ raw_payload, .. } => 1 + raw_payload.len()`). +- `encode` arm: `Self::RoutineControl(req) => req.encode(writer)?,` (remove the old field-writing block). +- `service` arm: `Self::RoutineControl(_) => UdsServiceType::RoutineControl,`. +- `is_positive_response_suppressed`: add `Self::RoutineControl(req) => req.suppress_positive_response(),` before the `_ => false` arm. + +In `src/response.rs`: +- Add `RoutineControlResponse` to the crate imports. +- Change the variant from `RoutineControl { routine_control_type: u8, raw_status_record: &'a [u8] }` to `RoutineControl(RoutineControlResponse<'a>)`; update its doc comment. +- `decode` arm becomes: + ```rust + UdsServiceType::RoutineControl => Self::RoutineControl( + ::decode_exact(payload)?, + ), + ``` +- `encoded_size` arm: `Self::RoutineControl(resp) => resp.encoded_size(),`. +- `encode` arm: `Self::RoutineControl(resp) => resp.encode(writer)?,`. +- `response_sid` arm: `Self::RoutineControl(_) => UdsServiceType::RoutineControl.response_to_byte(),`. + +- [ ] **Step 6: Run tests, verify, commit** + +Run: `cargo test --all-features && cargo clippy --all-features && cargo fmt` +Expected: PASS, including the new suppress-bit round-trip. +```bash +git add -A +git commit -m "$(printf 'wrap RoutineControl in descriptors; round-trip SPRMIB via SuppressablePositiveResponse\n\nCo-Authored-By: Claude Opus 4.8 ')" +``` + +--- + +## Task 6: `Decode` for the DTC params + `ReadDTCInfoRequest`; wrap `Request::ReadDTCInfo` + +**Files:** +- Modify: `src/common/dtc_snapshot.rs`, `src/common/dtc_ext_data.rs`, `src/common/dtc_status.rs` (add `Decode` to the 5 param types) +- Modify: `src/services/read_dtc_information.rs` (add `ReadDTCInfoRequest::Decode`) +- Modify: `src/request.rs` + +- [ ] **Step 1: Write a failing round-trip test (encode-as-oracle)** + +In `src/services/read_dtc_information.rs`, in the `read_dtc_info_request_encode_tests` module, add (`decode_exact` returns just the value, so assert equality directly): +```rust + #[test] + fn read_dtc_info_request_roundtrips() { + use crate::Decode; + let cases = [ + ReadDTCInfoRequest::new(ReadDTCInfoSubFunction::ReportSupportedDTC), + ReadDTCInfoRequest::new(ReadDTCInfoSubFunction::ReportDTC_ByStatusMask( + DTCStatusMask::from(0xFF), + )), + ReadDTCInfoRequest::new(ReadDTCInfoSubFunction::ReportWWHOBDDTC_ByMaskRecord( + FunctionalGroupIdentifier::EmissionsSystemGroup, + DTCStatusMask::from(0x08), + DTCSeverityMask::CheckImmediately, + )), + ReadDTCInfoRequest::new(ReadDTCInfoSubFunction::ISOSAEReserved(0x57)), + ]; + for req in cases { + let mut buf = [0u8; 16]; + let written = Encode::encode(&req, &mut buf.as_mut_slice()).unwrap(); + let decoded = ::decode_exact(&buf[..written]).unwrap(); + assert_eq!(decoded, req); + } + } +``` +`ReadDTCInfoRequest` derives `PartialEq` already (verify; it derives `Clone, Copy, Debug, PartialEq`). + +- [ ] **Step 2: Run to verify it fails** + +Run: `cargo test --all-features read_dtc_info_request_roundtrips` +Expected: FAIL (no `Decode` for `ReadDTCInfoRequest`, and param types lack `Decode`). + +- [ ] **Step 3: Add `Decode` to the 5 DTC parameter types** + +These mirror their Phase 1 `Encode` (read exactly 1 byte). Each round-trips its `Encode` (verified: `new`/`from` followed by `value()`/`bits()`/`.0` is the identity). + +In `src/common/dtc_snapshot.rs`, add `Decode` to the import (`use crate::{Decode, Encode, Error};`) and after the `impl Encode for DTCSnapshotRecordNumber`: +```rust +impl<'a> Decode<'a> for DTCSnapshotRecordNumber { + fn decode(buf: &'a [u8]) -> Result<(Self, &'a [u8]), Error> { + if buf.is_empty() { + return Err(Error::InsufficientData(1)); + } + Ok((Self::new(buf[0]), &buf[1..])) + } +} +``` + +In `src/common/dtc_ext_data.rs`, add `Decode` to the import and after `impl Encode for DTCExtDataRecordNumber`: +```rust +impl<'a> Decode<'a> for DTCExtDataRecordNumber { + fn decode(buf: &'a [u8]) -> Result<(Self, &'a [u8]), Error> { + if buf.is_empty() { + return Err(Error::InsufficientData(1)); + } + Ok((Self::new(buf[0]), &buf[1..])) + } +} +``` + +In `src/common/dtc_status.rs` (already imports `Decode`), add after each type's `Encode` impl: +```rust +impl<'a> Decode<'a> for DTCStoredDataRecordNumber { + fn decode(buf: &'a [u8]) -> Result<(Self, &'a [u8]), Error> { + if buf.is_empty() { + return Err(Error::InsufficientData(1)); + } + Ok((Self::from(buf[0]), &buf[1..])) + } +} + +impl<'a> Decode<'a> for DTCSeverityMask { + fn decode(buf: &'a [u8]) -> Result<(Self, &'a [u8]), Error> { + if buf.is_empty() { + return Err(Error::InsufficientData(1)); + } + Ok((Self::from(buf[0]), &buf[1..])) + } +} + +impl<'a> Decode<'a> for FunctionalGroupIdentifier { + fn decode(buf: &'a [u8]) -> Result<(Self, &'a [u8]), Error> { + if buf.is_empty() { + return Err(Error::InsufficientData(1)); + } + Ok((Self::from(buf[0]), &buf[1..])) + } +} +``` +(`DTCStoredDataRecordNumber` uses the lenient `From`, not `new` — decode must not reject reserved record numbers. `DTCSeverityMask` and `FunctionalGroupIdentifier` both have `From`.) + +- [ ] **Step 4: Implement `ReadDTCInfoRequest::Decode` (25-variant inverse)** + +In `src/services/read_dtc_information.rs`, after the `impl Encode for ReadDTCInfoRequest` block (relocated near the type in Phase 1), add: +```rust +impl<'a> Decode<'a> for ReadDTCInfoRequest { + #[allow(clippy::too_many_lines)] + fn decode(buf: &'a [u8]) -> Result<(Self, &'a [u8]), Error> { + use ReadDTCInfoSubFunction as S; + if buf.is_empty() { + return Err(Error::InsufficientData(1)); + } + let sub = buf[0]; + let rest = &buf[1..]; + let (dtc_subfunction, rest) = match sub { + 0x01 => { + let (m, r) = DTCStatusMask::decode(rest)?; + (S::ReportNumberOfDTC_ByStatusMask(m), r) + } + 0x02 => { + let (m, r) = DTCStatusMask::decode(rest)?; + (S::ReportDTC_ByStatusMask(m), r) + } + 0x03 => (S::ReportDTCSnapshotIdentification, rest), + 0x04 => { + let (rec, r) = DTCRecord::decode(rest)?; + let (n, r) = DTCSnapshotRecordNumber::decode(r)?; + (S::ReportDTCSnapshotRecord_ByDTCNumber(rec, n), r) + } + 0x05 => { + let (n, r) = DTCStoredDataRecordNumber::decode(rest)?; + (S::ReportDTCStoredData_ByRecordNumber(n), r) + } + 0x06 => { + let (rec, r) = DTCRecord::decode(rest)?; + let (n, r) = DTCExtDataRecordNumber::decode(r)?; + (S::ReportDTCExtDataRecord_ByDTCNumber(rec, n), r) + } + 0x07 => { + let (s, r) = DTCSeverityMask::decode(rest)?; + let (m, r) = DTCStatusMask::decode(r)?; + (S::ReportNumberOfDTC_BySeverityMaskRecord(s, m), r) + } + 0x08 => { + let (s, r) = DTCSeverityMask::decode(rest)?; + let (m, r) = DTCStatusMask::decode(r)?; + (S::ReportDTC_BySeverityMaskRecord(s, m), r) + } + 0x09 => { + let (rec, r) = DTCRecord::decode(rest)?; + (S::ReportSeverityInfoOfDTC(rec), r) + } + 0x0A => (S::ReportSupportedDTC, rest), + 0x0B => (S::ReportFirstTestFailedDTC, rest), + 0x0C => (S::ReportFirstConfirmedDTC, rest), + 0x0D => (S::ReportMostRecentTestFailedDTC, rest), + 0x0E => (S::ReportMostRecentConfirmedDTC, rest), + 0x14 => (S::ReportDTCFaultDetectionCounter, rest), + 0x15 => (S::ReportDTCWithPermanentStatus, rest), + 0x16 => { + let (n, r) = DTCExtDataRecordNumber::decode(rest)?; + (S::ReportDTCExtDataRecord_ByRecordNumber(n), r) + } + 0x17 => { + let (m, r) = DTCStatusMask::decode(rest)?; + (S::ReportUserDefMemoryDTC_ByStatusMask(m), r) + } + 0x18 => { + let (rec, r) = DTCRecord::decode(rest)?; + let (n, r) = DTCSnapshotRecordNumber::decode(r)?; + let (mem, r) = u8::decode(r)?; + ( + S::ReportUserDefMemoryDTCSnapshotRecord_ByDTCNumber(rec, n, mem), + r, + ) + } + 0x19 => { + let (rec, r) = DTCRecord::decode(rest)?; + let (n, r) = DTCExtDataRecordNumber::decode(r)?; + let (mem, r) = u8::decode(r)?; + ( + S::ReportUserDefMemoryDTCExtDataRecord_ByDTCNumber(rec, n, mem), + r, + ) + } + 0x1A => { + let (n, r) = DTCExtDataRecordNumber::decode(rest)?; + (S::ReportSupportedDTCExtDataRecord(n), r) + } + 0x42 => { + let (g, r) = FunctionalGroupIdentifier::decode(rest)?; + let (m, r) = DTCStatusMask::decode(r)?; + let (s, r) = DTCSeverityMask::decode(r)?; + (S::ReportWWHOBDDTC_ByMaskRecord(g, m, s), r) + } + 0x55 => { + let (g, r) = FunctionalGroupIdentifier::decode(rest)?; + (S::ReportWWHOBDDTC_WithPermanentStatus(g), r) + } + 0x56 => { + let (g, r) = FunctionalGroupIdentifier::decode(rest)?; + let (rg, r) = u8::decode(r)?; + ( + S::ReportDTCInformation_ByDTCReadinessGroupIdentifier(g, rg), + r, + ) + } + other => (S::ISOSAEReserved(other), rest), + }; + Ok((ReadDTCInfoRequest::new(dtc_subfunction), rest)) + } +} +``` + +- [ ] **Step 5: Wrap `Request::ReadDTCInfo`** + +In `src/request.rs`: +- Add `ReadDTCInfoRequest` to the `services::{…}` import. +- Change the variant from `ReadDTCInfo(&'a [u8])` to `ReadDTCInfo(ReadDTCInfoRequest)` (no lifetime — it is owned); update its doc comment. +- `decode` arm: + ```rust + UdsServiceType::ReadDTCInfo => { + Self::ReadDTCInfo(::decode_exact(payload)?) + } + ``` +- `encoded_size`: remove `ReadDTCInfo` from the remaining grouped raw arm (now just `Self::ReadDataByIdentifier(bytes) => bytes.len()`) and add `Self::ReadDTCInfo(req) => req.encoded_size(),`. +- `encode`: split out similarly: `Self::ReadDTCInfo(req) => req.encode(writer)?,`. +- `service` arm unchanged. + +After this, the only raw-bytes request variants remaining are `ReadDataByIdentifier(&[u8])` and `Other { data }` — as designed. + +- [ ] **Step 6: Run tests, verify, commit** + +Run: `cargo test --all-features && cargo clippy --all-features && cargo fmt` +Expected: PASS, including `read_dtc_info_request_roundtrips`. +```bash +git add -A +git commit -m "$(printf 'add Decode for DTC params and ReadDTCInfoRequest; wrap Request::ReadDTCInfo\n\nCo-Authored-By: Claude Opus 4.8 ')" +``` + +--- + +## Task 7: Full-matrix verification + +No code changes; if any command fails, fix the offending task and re-run. + +- [ ] **Step 1: host build + test** +```bash +cargo build --all-features --release +cargo test --all-features +``` +- [ ] **Step 2: no_std / no_alloc bare-metal** +```bash +cargo build --no-default-features --target thumbv6m-none-eabi +cargo build --no-default-features --features alloc --target thumbv6m-none-eabi +``` +- [ ] **Step 3: clippy combos** +```bash +cargo clippy --all-features +cargo clippy --no-default-features +cargo clippy --no-default-features --features alloc +``` +- [ ] **Step 4: fmt + doc + leftover-name sweep** +```bash +cargo fmt -- --check +cargo doc --release --all-features --no-deps +grep -rn "RequestTx\|ResponseTx\|ResponseRx\|PayloadTx" src README.md +``` +Expected: all green; the grep shows only `ReadDataByIdentifierRequestTx`. +- [ ] **Step 5: (No commit)** — verification only. Phase 2 complete. + +--- + +## Self-review notes + +- **Spec coverage:** Decision 1 (naming) → Task 1; Decision 2 (wrapping) → Tasks 4–6 (WDBI, RoutineControl, ReadDTCInfo; RDBI deliberately left raw); Decision 3 (varint dedup) → Task 2; Decision 4 (macro merge) → Task 3; testing/matrix → Task 7. +- **SPRMIB fidelity** locked by `routine_control_request_roundtrips_with_suppress_bit` (Task 5). +- **`ReadDTCInfoRequest::Decode`** correctness guarded by encode-as-oracle round-trip (Task 6), reusing the Phase 1 `Encode`. +- **Type consistency:** all `Decode<'a>`/`Encode` signatures match `src/traits.rs`; param-type `Decode`s use the lenient `From`/`new` that round-trips each `Encode`; `read_be_uint`/`write_be_uint` are `pub(crate)` per the spec. +- **RDBI** remains the single documented raw exception (request `&[u8]`, `ReadDataByIdentifierRequestTx` keeps its suffix). From 741ca85601658e3249c3d17ee0475d5803867edf Mon Sep 17 00:00:00 2001 From: Zach Heylmun Date: Wed, 3 Jun 2026 19:03:18 -0400 Subject: [PATCH 53/58] rename bidirectional descriptor types: drop misleading Tx/Rx suffixes --- src/lib.rs | 32 +++--- src/request.rs | 16 +-- src/response.rs | 28 ++--- src/services/mod.rs | 16 +-- src/services/read_dtc_information.rs | 8 +- src/services/request_download.rs | 18 ++-- src/services/request_file_transfer.rs | 130 +++++++++++------------ src/services/routine_control.rs | 22 ++-- src/services/security_access.rs | 24 ++--- src/services/transfer_data.rs | 32 +++--- src/services/write_data_by_identifier.rs | 10 +- 11 files changed, 166 insertions(+), 170 deletions(-) diff --git a/src/lib.rs b/src/lib.rs index 51c3faa..4339d40 100644 --- a/src/lib.rs +++ b/src/lib.rs @@ -38,13 +38,13 @@ pub use services::{ ControlDTCSettingsRequest, ControlDTCSettingsResponse, DiagnosticSessionControlRequest, DiagnosticSessionControlResponse, DirSizePayload, DtcAndStatusIter, DtcFaultDetectionIter, DtcSeverityAndStatusIter, EcuResetRequest, EcuResetResponse, FileOperationMode, - FileSizePayload, NamePayloadTx, NegativeResponse, PositionPayload, ReadDTCInfoRequest, - ReadDTCInfoResponseRx, ReadDTCInfoSubFunction, ReadDataByIdentifierRequestTx, - RequestDownloadRequest, RequestDownloadResponseTx, RequestFileTransferRequestTx, - RequestFileTransferResponseTx, RoutineControlRequestTx, RoutineControlResponseTx, - SecurityAccessRequestTx, SecurityAccessResponseTx, SentDataPayloadTx, SizePayload, - TesterPresentRequest, TesterPresentResponse, TransferDataRequestTx, TransferDataResponseTx, - WriteDataByIdentifierRequestTx, WriteDataByIdentifierResponse, + FileSizePayload, NamePayload, NegativeResponse, PositionPayload, ReadDTCInfoRequest, + ReadDTCInfoResponse, ReadDTCInfoSubFunction, ReadDataByIdentifierRequestTx, + RequestDownloadRequest, RequestDownloadResponse, RequestFileTransferRequest, + RequestFileTransferResponse, RoutineControlRequest, RoutineControlResponse, + SecurityAccessRequest, SecurityAccessResponse, SentDataPayload, SizePayload, + TesterPresentRequest, TesterPresentResponse, TransferDataRequest, TransferDataResponse, + WriteDataByIdentifierRequest, WriteDataByIdentifierResponse, }; /// UDS positive-response service-ID offset. Added to the request SID to form the response SID. @@ -53,7 +53,7 @@ pub const SUCCESS: u8 = 0x80; /// Signals that the server received the request but needs additional time to process it. pub const PENDING: u8 = 0x78; -/// What type of routine control to perform for a [`RoutineControlRequestTx`]. +/// What type of routine control to perform for a [`RoutineControlRequest`]. #[cfg_attr(feature = "serde", derive(serde::Deserialize, serde::Serialize))] #[cfg_attr(feature = "utoipa", derive(utoipa::ToSchema))] #[cfg_attr(feature = "clap", derive(clap::ValueEnum))] @@ -64,7 +64,7 @@ pub enum RoutineControlSubFunction { /// which indicates that the routine has already been performed, or is in progress /// /// It might be necessary to switch the server to a specific Diagnostic Session via [`DiagnosticSessionControlRequest`] before starting the routine, - /// or unlock the server using [`SecurityAccessRequestTx`] before starting the routine. + /// or unlock the server using [`SecurityAccessRequest`] before starting the routine. StartRoutine, /// The server routine shall be stopped in the server's memory sometime between the completion of the `StopRoutine` request and the completion of the 1st response message @@ -153,12 +153,12 @@ mod no_std_api_tests { #[test] fn encode_decode_transfer_data_tx_roundtrip() { let data = [0x01, 0x02, 0x03, 0x04]; - let req = TransferDataRequestTx::new(0x05, &data); + let req = TransferDataRequest::new(0x05, &data); let mut buf = [0u8; 16]; let written = Encode::encode(&req, &mut buf.as_mut_slice()).unwrap(); assert_eq!(written, 5); - let (decoded, _) = ::decode(&buf[..written]).unwrap(); + let (decoded, _) = ::decode(&buf[..written]).unwrap(); assert_eq!(decoded.block_sequence_counter, 0x05); assert_eq!(decoded.data, &[0x01, 0x02, 0x03, 0x04]); } @@ -273,12 +273,8 @@ mod no_std_api_tests { #[test] fn const_construction() { // Verify const construction works at compile time - const _REQ: TransferDataRequestTx<'static> = - TransferDataRequestTx::new(1, &[0x01, 0x02, 0x03]); - const _SEC: SecurityAccessRequestTx<'static> = SecurityAccessRequestTx::new( - false, - SecurityAccessType::RequestSeed(0x01), - &[0xAA, 0xBB], - ); + const _REQ: TransferDataRequest<'static> = TransferDataRequest::new(1, &[0x01, 0x02, 0x03]); + const _SEC: SecurityAccessRequest<'static> = + SecurityAccessRequest::new(false, SecurityAccessType::RequestSeed(0x01), &[0xAA, 0xBB]); } } diff --git a/src/request.rs b/src/request.rs index 533ffa0..a4b84cc 100644 --- a/src/request.rs +++ b/src/request.rs @@ -4,8 +4,8 @@ use crate::{ services::{ ClearDiagnosticInfoRequest, CommunicationControlRequest, ControlDTCSettingsRequest, DiagnosticSessionControlRequest, EcuResetRequest, RequestDownloadRequest, - RequestFileTransferRequestTx, SecurityAccessRequestTx, TesterPresentRequest, - TransferDataRequestTx, + RequestFileTransferRequest, SecurityAccessRequest, TesterPresentRequest, + TransferDataRequest, }, }; @@ -35,7 +35,7 @@ pub enum Request<'a> { /// Request download. RequestDownload(RequestDownloadRequest), /// Request file transfer. - RequestFileTransfer(RequestFileTransferRequestTx<'a>), + RequestFileTransfer(RequestFileTransferRequest<'a>), /// Request transfer exit. RequestTransferExit, /// Routine control request. Sub-function byte + raw payload. @@ -46,11 +46,11 @@ pub enum Request<'a> { raw_payload: &'a [u8], }, /// Security access request. - SecurityAccess(SecurityAccessRequestTx<'a>), + SecurityAccess(SecurityAccessRequest<'a>), /// Tester present request. TesterPresent(TesterPresentRequest), /// Transfer data request. - TransferData(TransferDataRequestTx<'a>), + TransferData(TransferDataRequest<'a>), /// Write data by identifier request. Raw DID + payload bytes. WriteDataByIdentifier(&'a [u8]), /// A known-but-unmodeled (or unrecognized) service. Carries the service type and @@ -96,7 +96,7 @@ impl<'a> Decode<'a> for Request<'a> { Self::RequestDownload(::decode_exact(payload)?) } UdsServiceType::RequestFileTransfer => Self::RequestFileTransfer( - ::decode_exact(payload)?, + ::decode_exact(payload)?, ), UdsServiceType::RequestTransferExit => Self::RequestTransferExit, UdsServiceType::RoutineControl => { @@ -109,13 +109,13 @@ impl<'a> Decode<'a> for Request<'a> { } } UdsServiceType::SecurityAccess => { - Self::SecurityAccess(::decode_exact(payload)?) + Self::SecurityAccess(::decode_exact(payload)?) } UdsServiceType::TesterPresent => { Self::TesterPresent(::decode_exact(payload)?) } UdsServiceType::TransferData => { - Self::TransferData(::decode_exact(payload)?) + Self::TransferData(::decode_exact(payload)?) } UdsServiceType::WriteDataByIdentifier => Self::WriteDataByIdentifier(payload), _ => Self::Other { diff --git a/src/response.rs b/src/response.rs index 880f9d4..157c754 100644 --- a/src/response.rs +++ b/src/response.rs @@ -1,8 +1,8 @@ use crate::{ CommunicationControlResponse, ControlDTCSettingsResponse, Decode, DiagnosticSessionControlResponse, EcuResetResponse, Encode, Error, NegativeResponse, - ReadDTCInfoResponseRx, RequestDownloadResponseTx, RequestFileTransferResponseTx, - SecurityAccessResponseTx, TesterPresentResponse, TransferDataResponseTx, UdsServiceType, + ReadDTCInfoResponse, RequestDownloadResponse, RequestFileTransferResponse, + SecurityAccessResponse, TesterPresentResponse, TransferDataResponse, UdsServiceType, }; /// Parsed zero-copy UDS response. Borrows from the wire buffer. @@ -27,11 +27,11 @@ pub enum Response<'a> { /// Positive response to `ReadDataByIdentifier`. Raw payload bytes. ReadDataByIdentifier(&'a [u8]), /// Positive response to `ReadDTCInformation` with lazy iterators. - ReadDTCInfo(ReadDTCInfoResponseRx<'a>), + ReadDTCInfo(ReadDTCInfoResponse<'a>), /// Positive response to `RequestDownload`. - RequestDownload(RequestDownloadResponseTx<'a>), + RequestDownload(RequestDownloadResponse<'a>), /// Positive response to `RequestFileTransfer`. - RequestFileTransfer(RequestFileTransferResponseTx<'a>), + RequestFileTransfer(RequestFileTransferResponse<'a>), /// Positive response to `RequestTransferExit`. RequestTransferExit, /// Positive response to `RoutineControl`. Raw status record bytes. @@ -42,11 +42,11 @@ pub enum Response<'a> { raw_status_record: &'a [u8], }, /// Positive response to `SecurityAccess`. - SecurityAccess(SecurityAccessResponseTx<'a>), + SecurityAccess(SecurityAccessResponse<'a>), /// Positive response to `TesterPresent`. TesterPresent(TesterPresentResponse), /// Positive response to `TransferData`. - TransferData(TransferDataResponseTx<'a>), + TransferData(TransferDataResponse<'a>), /// Positive response to `WriteDataByIdentifier`. Contains the echoed DID bytes. WriteDataByIdentifier(&'a [u8]), /// A known-but-unmodeled (or unrecognized) service response. Carries the service @@ -89,13 +89,13 @@ impl<'a> Decode<'a> for Response<'a> { } UdsServiceType::ReadDataByIdentifier => Self::ReadDataByIdentifier(payload), UdsServiceType::ReadDTCInfo => { - Self::ReadDTCInfo(::decode_exact(payload)?) + Self::ReadDTCInfo(::decode_exact(payload)?) + } + UdsServiceType::RequestDownload => { + Self::RequestDownload(::decode_exact(payload)?) } - UdsServiceType::RequestDownload => Self::RequestDownload( - ::decode_exact(payload)?, - ), UdsServiceType::RequestFileTransfer => Self::RequestFileTransfer( - ::decode_exact(payload)?, + ::decode_exact(payload)?, ), UdsServiceType::RequestTransferExit => Self::RequestTransferExit, UdsServiceType::RoutineControl => { @@ -108,13 +108,13 @@ impl<'a> Decode<'a> for Response<'a> { } } UdsServiceType::SecurityAccess => { - Self::SecurityAccess(::decode_exact(payload)?) + Self::SecurityAccess(::decode_exact(payload)?) } UdsServiceType::TesterPresent => { Self::TesterPresent(::decode_exact(payload)?) } UdsServiceType::TransferData => { - Self::TransferData(::decode_exact(payload)?) + Self::TransferData(::decode_exact(payload)?) } UdsServiceType::WriteDataByIdentifier => Self::WriteDataByIdentifier(payload), _ => Self::Other { diff --git a/src/services/mod.rs b/src/services/mod.rs index fc5b6ba..1ff3667 100644 --- a/src/services/mod.rs +++ b/src/services/mod.rs @@ -24,29 +24,29 @@ pub use read_data_by_identifier::ReadDataByIdentifierRequestTx; mod read_dtc_information; pub use read_dtc_information::{ DtcAndStatusIter, DtcFaultDetectionIter, DtcSeverityAndStatusIter, ReadDTCInfoRequest, - ReadDTCInfoResponseRx, ReadDTCInfoSubFunction, + ReadDTCInfoResponse, ReadDTCInfoSubFunction, }; mod request_download; -pub use request_download::{RequestDownloadRequest, RequestDownloadResponseTx}; +pub use request_download::{RequestDownloadRequest, RequestDownloadResponse}; mod request_file_transfer; pub use request_file_transfer::{ - DirSizePayload, FileOperationMode, FileSizePayload, NamePayloadTx, PositionPayload, - RequestFileTransferRequestTx, RequestFileTransferResponseTx, SentDataPayloadTx, SizePayload, + DirSizePayload, FileOperationMode, FileSizePayload, NamePayload, PositionPayload, + RequestFileTransferRequest, RequestFileTransferResponse, SentDataPayload, SizePayload, }; mod routine_control; -pub use routine_control::{RoutineControlRequestTx, RoutineControlResponseTx}; +pub use routine_control::{RoutineControlRequest, RoutineControlResponse}; mod security_access; -pub use security_access::{SecurityAccessRequestTx, SecurityAccessResponseTx}; +pub use security_access::{SecurityAccessRequest, SecurityAccessResponse}; mod tester_present; pub use tester_present::{TesterPresentRequest, TesterPresentResponse}; mod transfer_data; -pub use transfer_data::{TransferDataRequestTx, TransferDataResponseTx}; +pub use transfer_data::{TransferDataRequest, TransferDataResponse}; mod write_data_by_identifier; -pub use write_data_by_identifier::{WriteDataByIdentifierRequestTx, WriteDataByIdentifierResponse}; +pub use write_data_by_identifier::{WriteDataByIdentifierRequest, WriteDataByIdentifierResponse}; diff --git a/src/services/read_dtc_information.rs b/src/services/read_dtc_information.rs index 7da5b3f..0e7a3d3 100644 --- a/src/services/read_dtc_information.rs +++ b/src/services/read_dtc_information.rs @@ -526,7 +526,7 @@ impl Iterator for DtcSeverityAndStatusIter<'_> { /// that parse on demand without allocation. #[derive(Clone, Debug)] #[non_exhaustive] -pub enum ReadDTCInfoResponseRx<'a> { +pub enum ReadDTCInfoResponse<'a> { /// Sub-functions 0x01, 0x07: count of DTCs matching a mask. NumberOfDTCs { /// Sub-function byte echo. @@ -574,7 +574,7 @@ pub enum ReadDTCInfoResponseRx<'a> { }, } -impl<'a> ReadDTCInfoResponseRx<'a> { +impl<'a> ReadDTCInfoResponse<'a> { /// Iterate `(DTCRecord, DTCStatusMask)` pairs for `DTCList` variants. /// /// Returns `None` if this is not a `DTCList` variant. @@ -613,7 +613,7 @@ impl<'a> ReadDTCInfoResponseRx<'a> { } } -impl<'a> Decode<'a> for ReadDTCInfoResponseRx<'a> { +impl<'a> Decode<'a> for ReadDTCInfoResponse<'a> { fn decode(buf: &'a [u8]) -> Result<(Self, &'a [u8]), Error> { if buf.is_empty() { return Err(Error::InsufficientData(1)); @@ -690,7 +690,7 @@ impl<'a> Decode<'a> for ReadDTCInfoResponseRx<'a> { } } -impl Encode for ReadDTCInfoResponseRx<'_> { +impl Encode for ReadDTCInfoResponse<'_> { fn encoded_size(&self) -> usize { match self { Self::NumberOfDTCs { .. } => 4, diff --git a/src/services/request_download.rs b/src/services/request_download.rs index 160d9f4..f7fe25f 100644 --- a/src/services/request_download.rs +++ b/src/services/request_download.rs @@ -14,7 +14,7 @@ const REQUEST_DOWNLOAD_NEGATIVE_RESPONSE_CODES: [NegativeResponseCode; 6] = [ /// A request to the server for it to download data from the client /// -/// A positive response to this request ([`RequestDownloadResponseTx`]) will happen +/// A positive response to this request ([`RequestDownloadResponse`]) will happen /// after the server takes all necessary actions to receive the data once the server is ready to receive /// /// This is a variable length Request, determined by the `address_and_length_format_identifier` value @@ -32,7 +32,7 @@ pub struct RequestDownloadRequest { /// Has a variable number of bytes, max of 5 pub memory_address: u64, /// Size of the data to be downloaded. Number of bytes sent is determined by `address_and_length_format_identifier` - /// Used by the server to validate the data transferred by the [`TransferDataRequestTx`](crate::TransferDataRequestTx) service + /// Used by the server to validate the data transferred by the [`TransferDataRequest`](crate::TransferDataRequest) service /// Has a variable number of bytes, max of 4 pub memory_size: u32, } @@ -143,17 +143,17 @@ impl<'a> Decode<'a> for RequestDownloadRequest { } } -/// Zero-alloc TX response for request download. Borrows from the caller. +/// Zero-alloc response for request download. Borrows from the caller. /// /// Positive response to a [`RequestDownloadRequest`] indicating the server is ready to receive data. #[derive(Clone, Copy, Debug, PartialEq)] -pub struct RequestDownloadResponseTx<'d> { +pub struct RequestDownloadResponse<'d> { length_format_identifier: LengthFormatIdentifier, - /// Maximum number of bytes per [`TransferDataRequestTx`](crate::TransferDataRequestTx). + /// Maximum number of bytes per [`TransferDataRequest`](crate::TransferDataRequest). pub max_number_of_block_length: &'d [u8], } -impl<'d> RequestDownloadResponseTx<'d> { +impl<'d> RequestDownloadResponse<'d> { /// Create a new request download response from a raw format byte and block length. #[must_use] pub fn new(length_format_byte: u8, max_number_of_block_length: &'d [u8]) -> Self { @@ -164,7 +164,7 @@ impl<'d> RequestDownloadResponseTx<'d> { } } -impl Encode for RequestDownloadResponseTx<'_> { +impl Encode for RequestDownloadResponse<'_> { fn encoded_size(&self) -> usize { 1 + self.max_number_of_block_length.len() } @@ -180,7 +180,7 @@ impl Encode for RequestDownloadResponseTx<'_> { } } -impl<'a> Decode<'a> for RequestDownloadResponseTx<'a> { +impl<'a> Decode<'a> for RequestDownloadResponse<'a> { fn decode(buf: &'a [u8]) -> Result<(Self, &'a [u8]), Error> { if buf.is_empty() { return Err(Error::InsufficientData(1)); @@ -299,7 +299,7 @@ mod tests { #[test] fn response_encode_size_agrees() { let block = [0x10u8, 0x00, 0x00]; - let resp = RequestDownloadResponseTx::new(0x30, &block); + let resp = RequestDownloadResponse::new(0x30, &block); assert_encode_size_agrees(&resp); } } diff --git a/src/services/request_file_transfer.rs b/src/services/request_file_transfer.rs index 5b6d940..16b583d 100644 --- a/src/services/request_file_transfer.rs +++ b/src/services/request_file_transfer.rs @@ -59,7 +59,7 @@ impl TryFrom for FileOperationMode { } /// Holds the sizes of the file to be transferred (if applicable) -/// Used for both [`RequestFileTransferRequestTx`] and [`RequestFileTransferResponseTx`] +/// Used for both [`RequestFileTransferRequest`] and [`RequestFileTransferResponse`] /// /// | | [AddFile] | [DeleteFile] | [ReplaceFile] | [ReadFile] | [ReadDir] | [ResumeFile] | /// |--------------|-----------|--------------|---------------|------------|-----------|--------------| @@ -72,8 +72,8 @@ impl TryFrom for FileOperationMode { /// [ReadFile]: FileOperationMode::ReadFile /// [ReadDir]: FileOperationMode::ReadDir /// [ResumeFile]: FileOperationMode::ResumeFile -/// [Request]: RequestFileTransferRequestTx -/// [Response]: RequestFileTransferResponseTx +/// [Request]: RequestFileTransferRequest +/// [Response]: RequestFileTransferResponse #[allow(clippy::struct_field_names)] #[cfg_attr(feature = "serde", derive(serde::Deserialize, serde::Serialize))] #[cfg_attr(feature = "utoipa", derive(utoipa::ToSchema))] @@ -107,7 +107,7 @@ pub struct SizePayload { pub file_size_compressed: u128, } -/// Payload used for all [`RequestFileTransferRequestTx`] requests. +/// Payload used for all [`RequestFileTransferRequest`] requests. /// /// Borrows `file_path_and_name` from the caller. /// @@ -122,11 +122,11 @@ pub struct SizePayload { /// [ReadFile]: FileOperationMode::ReadFile /// [ReadDir]: FileOperationMode::ReadDir /// [ResumeFile]: FileOperationMode::ResumeFile -/// [Request]: RequestFileTransferRequestTx +/// [Request]: RequestFileTransferRequest #[cfg_attr(feature = "serde", derive(serde::Deserialize, serde::Serialize))] #[cfg_attr(feature = "utoipa", derive(utoipa::ToSchema))] #[derive(Clone, Copy, Debug, PartialEq)] -pub struct NamePayloadTx<'a> { +pub struct NamePayload<'a> { /// 0x01 - 0x06, the type of operation to be applied to the file or directory specified in `file_path_and_name` pub mode_of_operation: FileOperationMode, @@ -154,38 +154,38 @@ pub struct NamePayloadTx<'a> { #[cfg_attr(feature = "utoipa", derive(utoipa::ToSchema))] #[derive(Clone, Copy, Debug, PartialEq)] #[non_exhaustive] -pub enum RequestFileTransferRequestTx<'a> { +pub enum RequestFileTransferRequest<'a> { /// Add a file to the server AddFile( - #[cfg_attr(feature = "serde", serde(borrow))] NamePayloadTx<'a>, + #[cfg_attr(feature = "serde", serde(borrow))] NamePayload<'a>, DataFormatIdentifier, SizePayload, ), /// Delete the specified file from the server - DeleteFile(#[cfg_attr(feature = "serde", serde(borrow))] NamePayloadTx<'a>), + DeleteFile(#[cfg_attr(feature = "serde", serde(borrow))] NamePayload<'a>), /// Replace the specified file on the server, if it does not exist, add it ReplaceFile( - #[cfg_attr(feature = "serde", serde(borrow))] NamePayloadTx<'a>, + #[cfg_attr(feature = "serde", serde(borrow))] NamePayload<'a>, DataFormatIdentifier, SizePayload, ), /// Read the specified file from the server (upload) ReadFile( - #[cfg_attr(feature = "serde", serde(borrow))] NamePayloadTx<'a>, + #[cfg_attr(feature = "serde", serde(borrow))] NamePayload<'a>, DataFormatIdentifier, ), /// Read the directory from the server /// Implies that the request does not include a `fileName` - ReadDir(#[cfg_attr(feature = "serde", serde(borrow))] NamePayloadTx<'a>), + ReadDir(#[cfg_attr(feature = "serde", serde(borrow))] NamePayload<'a>), /// Resume a file transfer at the returned `filePosition` indicator /// The file must already exist in the ECU's filesystem ResumeFile( - #[cfg_attr(feature = "serde", serde(borrow))] NamePayloadTx<'a>, + #[cfg_attr(feature = "serde", serde(borrow))] NamePayload<'a>, DataFormatIdentifier, SizePayload, ), @@ -205,11 +205,11 @@ pub enum RequestFileTransferRequestTx<'a> { /// [ReadFile]: FileOperationMode::ReadFile /// [ReadDir]: FileOperationMode::ReadDir /// [ResumeFile]: FileOperationMode::ResumeFile -/// [Response]: RequestFileTransferResponseTx +/// [Response]: RequestFileTransferResponse #[cfg_attr(feature = "serde", derive(serde::Deserialize, serde::Serialize))] #[cfg_attr(feature = "utoipa", derive(utoipa::ToSchema))] #[derive(Clone, Copy, Debug, PartialEq)] -pub struct SentDataPayloadTx<'a> { +pub struct SentDataPayload<'a> { /// Not related to `RequestDownload` pub length_format_identifier: u8, /// This parameter is used by the requestFileTransfer positive response message to inform the client how many @@ -243,7 +243,7 @@ pub struct SentDataPayloadTx<'a> { /// [ReadFile]: FileOperationMode::ReadFile /// [ReadDir]: FileOperationMode::ReadDir /// [ResumeFile]: FileOperationMode::ResumeFile -/// [Response]: RequestFileTransferResponseTx +/// [Response]: RequestFileTransferResponse #[allow(clippy::struct_field_names)] #[cfg_attr(feature = "serde", derive(serde::Deserialize, serde::Serialize))] #[cfg_attr(feature = "utoipa", derive(utoipa::ToSchema))] @@ -269,7 +269,7 @@ pub struct FileSizePayload { /// [ReadFile]: FileOperationMode::ReadFile /// [ReadDir]: FileOperationMode::ReadDir /// [ResumeFile]: FileOperationMode::ResumeFile -/// [Response]: RequestFileTransferResponseTx +/// [Response]: RequestFileTransferResponse #[cfg_attr(feature = "serde", derive(serde::Deserialize, serde::Serialize))] #[cfg_attr(feature = "utoipa", derive(utoipa::ToSchema))] #[derive(Clone, Copy, Debug, PartialEq)] @@ -292,13 +292,13 @@ pub struct DirSizePayload { /// [ReadFile]: FileOperationMode::ReadFile /// [ReadDir]: FileOperationMode::ReadDir /// [ResumeFile]: FileOperationMode::ResumeFile -/// [Response]: RequestFileTransferResponseTx +/// [Response]: RequestFileTransferResponse #[cfg_attr(feature = "serde", derive(serde::Deserialize, serde::Serialize))] #[cfg_attr(feature = "utoipa", derive(utoipa::ToSchema))] #[derive(Clone, Copy, Debug, PartialEq)] pub struct PositionPayload { /// Specifies the byte position within the file at which the Tester will resume downloading after an initial download is suspended - /// A download is suspended when the ECU stops receiving [`crate::TransferDataRequestTx`] requests and does not receive the + /// A download is suspended when the ECU stops receiving [`crate::TransferDataRequest`] requests and does not receive the /// `RequestTransferExit` request to end the transfer before returning to the default session /// /// Fixed size: 8 bytes @@ -308,19 +308,19 @@ pub struct PositionPayload { pub file_position: u64, } -/// Response to a [`RequestFileTransferRequestTx`] from the server +/// Response to a [`RequestFileTransferRequest`] from the server /// -/// The server will respond with a [`RequestFileTransferResponseTx`] to indicate the status of the request +/// The server will respond with a [`RequestFileTransferResponse`] to indicate the status of the request /// `DataFormatIdentifier` - Echoes the value of the request #[cfg_attr(feature = "serde", derive(serde::Deserialize, serde::Serialize))] #[cfg_attr(feature = "utoipa", derive(utoipa::ToSchema))] #[derive(Clone, Copy, Debug, PartialEq)] #[non_exhaustive] -pub enum RequestFileTransferResponseTx<'a> { +pub enum RequestFileTransferResponse<'a> { /// Positive response to an [`AddFile`](FileOperationMode::AddFile) request. AddFile( FileOperationMode, - #[cfg_attr(feature = "serde", serde(borrow))] SentDataPayloadTx<'a>, + #[cfg_attr(feature = "serde", serde(borrow))] SentDataPayload<'a>, DataFormatIdentifier, ), /// Positive response to a [`DeleteFile`](FileOperationMode::DeleteFile) request. @@ -328,27 +328,27 @@ pub enum RequestFileTransferResponseTx<'a> { /// Positive response to a [`ReplaceFile`](FileOperationMode::ReplaceFile) request. ReplaceFile( FileOperationMode, - #[cfg_attr(feature = "serde", serde(borrow))] SentDataPayloadTx<'a>, + #[cfg_attr(feature = "serde", serde(borrow))] SentDataPayload<'a>, DataFormatIdentifier, ), /// Positive response to a [`ReadFile`](FileOperationMode::ReadFile) request, including file size. ReadFile( FileOperationMode, - #[cfg_attr(feature = "serde", serde(borrow))] SentDataPayloadTx<'a>, + #[cfg_attr(feature = "serde", serde(borrow))] SentDataPayload<'a>, DataFormatIdentifier, FileSizePayload, ), /// Positive response to a [`ReadDir`](FileOperationMode::ReadDir) request, including directory size. ReadDir( FileOperationMode, - #[cfg_attr(feature = "serde", serde(borrow))] SentDataPayloadTx<'a>, + #[cfg_attr(feature = "serde", serde(borrow))] SentDataPayload<'a>, DataFormatIdentifier, DirSizePayload, ), /// Positive response to a [`ResumeFile`](FileOperationMode::ResumeFile) request, including file position. ResumeFile( FileOperationMode, - #[cfg_attr(feature = "serde", serde(borrow))] SentDataPayloadTx<'a>, + #[cfg_attr(feature = "serde", serde(borrow))] SentDataPayload<'a>, DataFormatIdentifier, PositionPayload, ), @@ -361,7 +361,7 @@ pub enum RequestFileTransferResponseTx<'a> { // `file_size_parameter_length` must fit in a u128 (≤ 16 bytes per value). const U128_MAX_BYTES: usize = 16; -impl Encode for NamePayloadTx<'_> { +impl Encode for NamePayload<'_> { fn encoded_size(&self) -> usize { 1 + 2 + self.file_path_and_name.len() } @@ -380,7 +380,7 @@ impl Encode for NamePayloadTx<'_> { } } -impl<'a> Decode<'a> for NamePayloadTx<'a> { +impl<'a> Decode<'a> for NamePayload<'a> { fn decode(buf: &'a [u8]) -> Result<(Self, &'a [u8]), Error> { if buf.len() < 3 { return Err(Error::InsufficientData(3)); @@ -459,7 +459,7 @@ impl<'a> Decode<'a> for SizePayload { } } -impl Encode for SentDataPayloadTx<'_> { +impl Encode for SentDataPayload<'_> { fn encoded_size(&self) -> usize { 1 + self.max_number_of_block_length.len() } @@ -475,7 +475,7 @@ impl Encode for SentDataPayloadTx<'_> { } } -impl<'a> Decode<'a> for SentDataPayloadTx<'a> { +impl<'a> Decode<'a> for SentDataPayload<'a> { fn decode(buf: &'a [u8]) -> Result<(Self, &'a [u8]), Error> { if buf.is_empty() { return Err(Error::InsufficientData(1)); @@ -622,7 +622,7 @@ impl<'a> Decode<'a> for PositionPayload { } } -impl Encode for RequestFileTransferRequestTx<'_> { +impl Encode for RequestFileTransferRequest<'_> { fn encoded_size(&self) -> usize { match self { Self::AddFile(name, _, size) @@ -657,9 +657,9 @@ impl Encode for RequestFileTransferRequestTx<'_> { } } -impl<'a> Decode<'a> for RequestFileTransferRequestTx<'a> { +impl<'a> Decode<'a> for RequestFileTransferRequest<'a> { fn decode(buf: &'a [u8]) -> Result<(Self, &'a [u8]), Error> { - let (name, rest) = NamePayloadTx::decode(buf)?; + let (name, rest) = NamePayload::decode(buf)?; match name.mode_of_operation { FileOperationMode::DeleteFile => Ok((Self::DeleteFile(name), rest)), FileOperationMode::ReadDir => Ok((Self::ReadDir(name), rest)), @@ -691,7 +691,7 @@ impl<'a> Decode<'a> for RequestFileTransferRequestTx<'a> { } } -impl Encode for RequestFileTransferResponseTx<'_> { +impl Encode for RequestFileTransferResponse<'_> { fn encoded_size(&self) -> usize { match self { Self::DeleteFile(_) => 1, @@ -742,7 +742,7 @@ impl Encode for RequestFileTransferResponseTx<'_> { } } -impl<'a> Decode<'a> for RequestFileTransferResponseTx<'a> { +impl<'a> Decode<'a> for RequestFileTransferResponse<'a> { fn decode(buf: &'a [u8]) -> Result<(Self, &'a [u8]), Error> { if buf.is_empty() { return Err(Error::InsufficientData(1)); @@ -752,7 +752,7 @@ impl<'a> Decode<'a> for RequestFileTransferResponseTx<'a> { match mode { FileOperationMode::DeleteFile => Ok((Self::DeleteFile(mode), rest)), FileOperationMode::AddFile | FileOperationMode::ReplaceFile => { - let (sent, rest) = SentDataPayloadTx::decode(rest)?; + let (sent, rest) = SentDataPayload::decode(rest)?; if rest.is_empty() { return Err(Error::InsufficientData(1)); } @@ -766,7 +766,7 @@ impl<'a> Decode<'a> for RequestFileTransferResponseTx<'a> { Ok((value, rest)) } FileOperationMode::ReadFile => { - let (sent, rest) = SentDataPayloadTx::decode(rest)?; + let (sent, rest) = SentDataPayload::decode(rest)?; if rest.is_empty() { return Err(Error::InsufficientData(1)); } @@ -775,7 +775,7 @@ impl<'a> Decode<'a> for RequestFileTransferResponseTx<'a> { Ok((Self::ReadFile(mode, sent, dfi, fs), rest)) } FileOperationMode::ReadDir => { - let (sent, rest) = SentDataPayloadTx::decode(rest)?; + let (sent, rest) = SentDataPayload::decode(rest)?; if rest.is_empty() { return Err(Error::InsufficientData(1)); } @@ -784,7 +784,7 @@ impl<'a> Decode<'a> for RequestFileTransferResponseTx<'a> { Ok((Self::ReadDir(mode, sent, dfi, ds), rest)) } FileOperationMode::ResumeFile => { - let (sent, rest) = SentDataPayloadTx::decode(rest)?; + let (sent, rest) = SentDataPayload::decode(rest)?; if rest.is_empty() { return Err(Error::InsufficientData(1)); } @@ -817,8 +817,8 @@ mod request_tests { ); } - fn name_payload(mode: FileOperationMode, path: &str) -> NamePayloadTx<'_> { - NamePayloadTx { + fn name_payload(mode: FileOperationMode, path: &str) -> NamePayload<'_> { + NamePayload { mode_of_operation: mode, file_path_and_name_length: path.len() as u16, file_path_and_name: path, @@ -832,7 +832,7 @@ mod request_tests { let mut buf = [0u8; 64]; let written = Encode::encode(&n, &mut buf.as_mut_slice()).unwrap(); assert_eq!(written, n.encoded_size()); - let (decoded, rest) = NamePayloadTx::decode(&buf[..written]).unwrap(); + let (decoded, rest) = NamePayload::decode(&buf[..written]).unwrap(); assert!(rest.is_empty()); assert_eq!(decoded, n); assert_encode_size_agrees(&n); @@ -857,7 +857,7 @@ mod request_tests { #[test] fn add_file_request_roundtrip() { let path = "test.txt"; - let req = RequestFileTransferRequestTx::AddFile( + let req = RequestFileTransferRequest::AddFile( name_payload(FileOperationMode::AddFile, path), DataFormatIdentifier::from(0x00), SizePayload { @@ -869,7 +869,7 @@ mod request_tests { let mut buf = [0u8; 64]; let written = Encode::encode(&req, &mut buf.as_mut_slice()).unwrap(); assert_eq!(written, req.encoded_size()); - let (decoded, rest) = RequestFileTransferRequestTx::decode(&buf[..written]).unwrap(); + let (decoded, rest) = RequestFileTransferRequest::decode(&buf[..written]).unwrap(); assert!(rest.is_empty()); assert_eq!(decoded, req); assert_encode_size_agrees(&req); @@ -878,14 +878,14 @@ mod request_tests { #[test] fn delete_file_request_roundtrip() { let path = "/var/tmp/delete_file.bin"; - let req = RequestFileTransferRequestTx::DeleteFile(name_payload( + let req = RequestFileTransferRequest::DeleteFile(name_payload( FileOperationMode::DeleteFile, path, )); let mut buf = [0u8; 64]; let written = Encode::encode(&req, &mut buf.as_mut_slice()).unwrap(); assert_eq!(written, req.encoded_size()); - let (decoded, rest) = RequestFileTransferRequestTx::decode(&buf[..written]).unwrap(); + let (decoded, rest) = RequestFileTransferRequest::decode(&buf[..written]).unwrap(); assert!(rest.is_empty()); assert_eq!(decoded, req); assert_encode_size_agrees(&req); @@ -894,14 +894,14 @@ mod request_tests { #[test] fn read_file_request_roundtrip() { let path = "/etc/passwd"; - let req = RequestFileTransferRequestTx::ReadFile( + let req = RequestFileTransferRequest::ReadFile( name_payload(FileOperationMode::ReadFile, path), DataFormatIdentifier::from(0x11), ); let mut buf = [0u8; 64]; let written = Encode::encode(&req, &mut buf.as_mut_slice()).unwrap(); assert_eq!(written, req.encoded_size()); - let (decoded, rest) = RequestFileTransferRequestTx::decode(&buf[..written]).unwrap(); + let (decoded, rest) = RequestFileTransferRequest::decode(&buf[..written]).unwrap(); assert!(rest.is_empty()); assert_eq!(decoded, req); assert_encode_size_agrees(&req); @@ -911,10 +911,10 @@ mod request_tests { fn read_dir_request_roundtrip() { let path = "/var/log"; let req = - RequestFileTransferRequestTx::ReadDir(name_payload(FileOperationMode::ReadDir, path)); + RequestFileTransferRequest::ReadDir(name_payload(FileOperationMode::ReadDir, path)); let mut buf = [0u8; 64]; let written = Encode::encode(&req, &mut buf.as_mut_slice()).unwrap(); - let (decoded, _) = RequestFileTransferRequestTx::decode(&buf[..written]).unwrap(); + let (decoded, _) = RequestFileTransferRequest::decode(&buf[..written]).unwrap(); assert_eq!(decoded, req); assert_encode_size_agrees(&req); } @@ -922,7 +922,7 @@ mod request_tests { #[test] fn resume_file_request_roundtrip() { let path = "/big/file.bin"; - let req = RequestFileTransferRequestTx::ResumeFile( + let req = RequestFileTransferRequest::ResumeFile( name_payload(FileOperationMode::ResumeFile, path), DataFormatIdentifier::from(0x00), SizePayload { @@ -933,7 +933,7 @@ mod request_tests { ); let mut buf = [0u8; 64]; let written = Encode::encode(&req, &mut buf.as_mut_slice()).unwrap(); - let (decoded, _) = RequestFileTransferRequestTx::decode(&buf[..written]).unwrap(); + let (decoded, _) = RequestFileTransferRequest::decode(&buf[..written]).unwrap(); assert_eq!(decoded, req); assert_encode_size_agrees(&req); } @@ -944,8 +944,8 @@ mod response_tests { use super::*; use crate::test_util::assert_encode_size_agrees; - fn sent_data<'a>(block: &'a [u8]) -> SentDataPayloadTx<'a> { - SentDataPayloadTx { + fn sent_data<'a>(block: &'a [u8]) -> SentDataPayload<'a> { + SentDataPayload { length_format_identifier: block.len() as u8, max_number_of_block_length: block, } @@ -954,7 +954,7 @@ mod response_tests { #[test] fn add_file_response_roundtrip() { let block = [0x10u8, 0x00]; - let resp = RequestFileTransferResponseTx::AddFile( + let resp = RequestFileTransferResponse::AddFile( FileOperationMode::AddFile, sent_data(&block), DataFormatIdentifier::from(0x00), @@ -962,7 +962,7 @@ mod response_tests { let mut buf = [0u8; 32]; let written = Encode::encode(&resp, &mut buf.as_mut_slice()).unwrap(); assert_eq!(written, resp.encoded_size()); - let (decoded, rest) = RequestFileTransferResponseTx::decode(&buf[..written]).unwrap(); + let (decoded, rest) = RequestFileTransferResponse::decode(&buf[..written]).unwrap(); assert!(rest.is_empty()); assert_eq!(decoded, resp); assert_encode_size_agrees(&resp); @@ -970,11 +970,11 @@ mod response_tests { #[test] fn delete_file_response_roundtrip() { - let resp = RequestFileTransferResponseTx::DeleteFile(FileOperationMode::DeleteFile); + let resp = RequestFileTransferResponse::DeleteFile(FileOperationMode::DeleteFile); let mut buf = [0u8; 8]; let written = Encode::encode(&resp, &mut buf.as_mut_slice()).unwrap(); assert_eq!(written, 1); - let (decoded, _) = RequestFileTransferResponseTx::decode(&buf[..written]).unwrap(); + let (decoded, _) = RequestFileTransferResponse::decode(&buf[..written]).unwrap(); assert_eq!(decoded, resp); assert_encode_size_agrees(&resp); } @@ -982,7 +982,7 @@ mod response_tests { #[test] fn read_file_response_roundtrip() { let block = [0x04u8, 0x00]; - let resp = RequestFileTransferResponseTx::ReadFile( + let resp = RequestFileTransferResponse::ReadFile( FileOperationMode::ReadFile, sent_data(&block), DataFormatIdentifier::from(0x00), @@ -994,7 +994,7 @@ mod response_tests { ); let mut buf = [0u8; 64]; let written = Encode::encode(&resp, &mut buf.as_mut_slice()).unwrap(); - let (decoded, _) = RequestFileTransferResponseTx::decode(&buf[..written]).unwrap(); + let (decoded, _) = RequestFileTransferResponse::decode(&buf[..written]).unwrap(); assert_eq!(decoded, resp); assert_encode_size_agrees(&resp); } @@ -1002,7 +1002,7 @@ mod response_tests { #[test] fn read_dir_response_roundtrip() { let block = [0x04u8, 0x00]; - let resp = RequestFileTransferResponseTx::ReadDir( + let resp = RequestFileTransferResponse::ReadDir( FileOperationMode::ReadDir, sent_data(&block), DataFormatIdentifier::from(0x00), @@ -1013,7 +1013,7 @@ mod response_tests { ); let mut buf = [0u8; 64]; let written = Encode::encode(&resp, &mut buf.as_mut_slice()).unwrap(); - let (decoded, _) = RequestFileTransferResponseTx::decode(&buf[..written]).unwrap(); + let (decoded, _) = RequestFileTransferResponse::decode(&buf[..written]).unwrap(); assert_eq!(decoded, resp); assert_encode_size_agrees(&resp); } @@ -1021,7 +1021,7 @@ mod response_tests { #[test] fn resume_file_response_roundtrip() { let block = [0x04u8, 0x00]; - let resp = RequestFileTransferResponseTx::ResumeFile( + let resp = RequestFileTransferResponse::ResumeFile( FileOperationMode::ResumeFile, sent_data(&block), DataFormatIdentifier::from(0x00), @@ -1031,7 +1031,7 @@ mod response_tests { ); let mut buf = [0u8; 64]; let written = Encode::encode(&resp, &mut buf.as_mut_slice()).unwrap(); - let (decoded, _) = RequestFileTransferResponseTx::decode(&buf[..written]).unwrap(); + let (decoded, _) = RequestFileTransferResponse::decode(&buf[..written]).unwrap(); assert_eq!(decoded, resp); assert_encode_size_agrees(&resp); } diff --git a/src/services/routine_control.rs b/src/services/routine_control.rs index dca5ca9..a4b9025 100644 --- a/src/services/routine_control.rs +++ b/src/services/routine_control.rs @@ -10,15 +10,15 @@ use crate::{Encode, Error, RoutineControlSubFunction}; /// routine input parameters, exactly as it appears on the wire after the sub-function byte. #[derive(Clone, Copy, Debug, Eq, PartialEq)] #[non_exhaustive] -pub struct RoutineControlRequestTx<'d> { +pub struct RoutineControlRequest<'d> { /// The routine control operation (start, stop, or request results). pub sub_function: RoutineControlSubFunction, /// The raw payload bytes: routine identifier followed by optional parameters. pub raw_payload: &'d [u8], } -impl<'d> RoutineControlRequestTx<'d> { - /// Create a new `RoutineControlRequestTx`. +impl<'d> RoutineControlRequest<'d> { + /// Create a new `RoutineControlRequest`. #[must_use] pub const fn new(sub_function: RoutineControlSubFunction, raw_payload: &'d [u8]) -> Self { Self { @@ -28,7 +28,7 @@ impl<'d> RoutineControlRequestTx<'d> { } } -impl Encode for RoutineControlRequestTx<'_> { +impl Encode for RoutineControlRequest<'_> { fn encoded_size(&self) -> usize { 1 + self.raw_payload.len() } @@ -42,21 +42,21 @@ impl Encode for RoutineControlRequestTx<'_> { } } -/// `RoutineControlResponseTx` is a variable-length response that can contain routine status. +/// `RoutineControlResponse` is a variable-length response that can contain routine status. /// /// The status record is the routine identifier echo plus any routine-info / status bytes, /// held as raw bytes. #[derive(Clone, Copy, Debug, Eq, PartialEq)] #[non_exhaustive] -pub struct RoutineControlResponseTx<'d> { +pub struct RoutineControlResponse<'d> { /// The sub-function echoed from the routine control request. pub routine_control_type: RoutineControlSubFunction, /// Raw routine status record bytes (routine identifier + routine info + status). pub raw_status_record: &'d [u8], } -impl<'d> RoutineControlResponseTx<'d> { - /// Create a new `RoutineControlResponseTx`. +impl<'d> RoutineControlResponse<'d> { + /// Create a new `RoutineControlResponse`. #[must_use] pub const fn new( routine_control_type: RoutineControlSubFunction, @@ -69,7 +69,7 @@ impl<'d> RoutineControlResponseTx<'d> { } } -impl Encode for RoutineControlResponseTx<'_> { +impl Encode for RoutineControlResponse<'_> { fn encoded_size(&self) -> usize { 1 + self.raw_status_record.len() } @@ -94,7 +94,7 @@ mod test { fn encode_routine_control_request_tx() { // RID 0xFF00 (EraseMemory) + 1 parameter byte let payload = [0xFF, 0x00, 0xAA]; - let req = RoutineControlRequestTx::new(RoutineControlSubFunction::StartRoutine, &payload); + let req = RoutineControlRequest::new(RoutineControlSubFunction::StartRoutine, &payload); let mut buf = [0u8; 8]; let written = Encode::encode(&req, &mut buf.as_mut_slice()).unwrap(); assert_eq!(&buf[..written], &[0x01, 0xFF, 0x00, 0xAA]); @@ -104,7 +104,7 @@ mod test { #[test] fn encode_routine_control_response_tx() { let record = [0xFF, 0x00, 0x10]; - let resp = RoutineControlResponseTx::new(RoutineControlSubFunction::StartRoutine, &record); + let resp = RoutineControlResponse::new(RoutineControlSubFunction::StartRoutine, &record); let mut buf = [0u8; 8]; let written = Encode::encode(&resp, &mut buf.as_mut_slice()).unwrap(); assert_eq!(&buf[..written], &[0x01, 0xFF, 0x00, 0x10]); diff --git a/src/services/security_access.rs b/src/services/security_access.rs index c856262..4e280d4 100644 --- a/src/services/security_access.rs +++ b/src/services/security_access.rs @@ -34,14 +34,14 @@ const SECURITY_ACCESS_NEGATIVE_RESPONSE_CODES: [NegativeResponseCode; 8] = [ /// Successful verification of the key will result in the server unlocking the requested security level. /// Suppressing a positive response to this request is allowed. /// -/// Zero-alloc TX request for security access. Borrows from the caller. +/// Zero-alloc request for security access. Borrows from the caller. #[derive(Clone, Copy, Debug, Eq, PartialEq)] -pub struct SecurityAccessRequestTx<'d> { +pub struct SecurityAccessRequest<'d> { access_type: SuppressablePositiveResponse, request_data: &'d [u8], } -impl<'d> SecurityAccessRequestTx<'d> { +impl<'d> SecurityAccessRequest<'d> { /// Create a new security access request. #[must_use] pub const fn new( @@ -80,7 +80,7 @@ impl<'d> SecurityAccessRequestTx<'d> { } } -impl Encode for SecurityAccessRequestTx<'_> { +impl Encode for SecurityAccessRequest<'_> { fn encoded_size(&self) -> usize { 1 + self.request_data.len() } @@ -94,7 +94,7 @@ impl Encode for SecurityAccessRequestTx<'_> { } } -impl<'a> Decode<'a> for SecurityAccessRequestTx<'a> { +impl<'a> Decode<'a> for SecurityAccessRequest<'a> { fn decode(buf: &'a [u8]) -> Result<(Self, &'a [u8]), Error> { if buf.is_empty() { return Err(Error::InsufficientData(1)); @@ -110,16 +110,16 @@ impl<'a> Decode<'a> for SecurityAccessRequestTx<'a> { } } -/// Zero-alloc TX response for security access. Borrows from the caller. +/// Zero-alloc response for security access. Borrows from the caller. #[derive(Clone, Copy, Debug, Eq, PartialEq)] -pub struct SecurityAccessResponseTx<'d> { +pub struct SecurityAccessResponse<'d> { /// The security access type echoed from the request. pub access_type: SecurityAccessType, /// The security seed bytes (empty for a `SendKey` positive response). pub security_seed: &'d [u8], } -impl<'d> SecurityAccessResponseTx<'d> { +impl<'d> SecurityAccessResponse<'d> { /// Create a new security access response. #[must_use] pub const fn new(access_type: SecurityAccessType, security_seed: &'d [u8]) -> Self { @@ -130,7 +130,7 @@ impl<'d> SecurityAccessResponseTx<'d> { } } -impl Encode for SecurityAccessResponseTx<'_> { +impl Encode for SecurityAccessResponse<'_> { fn encoded_size(&self) -> usize { 1 + self.security_seed.len() } @@ -144,7 +144,7 @@ impl Encode for SecurityAccessResponseTx<'_> { } } -impl<'a> Decode<'a> for SecurityAccessResponseTx<'a> { +impl<'a> Decode<'a> for SecurityAccessResponse<'a> { fn decode(buf: &'a [u8]) -> Result<(Self, &'a [u8]), Error> { if buf.is_empty() { return Err(Error::InsufficientData(1)); @@ -174,7 +174,7 @@ mod request { 0x01, // aka SecurityAccessType::RequestSeed(0x01) 0x00, 0x01, 0x02, 0x03, 0x04, // fake data ]; - let (req, _) = ::decode(&bytes).unwrap(); + let (req, _) = ::decode(&bytes).unwrap(); assert_eq!(req.access_type(), SecurityAccessType::RequestSeed(0x01)); assert_eq!(req.request_data(), &[0x00, 0x01, 0x02, 0x03, 0x04]); @@ -201,7 +201,7 @@ mod response { 0x02, // aka SecurityAccessType::SendKey(0x02) 0x00, 0x01, 0x02, 0x03, 0x04, // fake data ]; - let (resp, _) = ::decode(&bytes).unwrap(); + let (resp, _) = ::decode(&bytes).unwrap(); assert_eq!(resp.access_type, SecurityAccessType::SendKey(0x02)); assert_eq!(resp.security_seed, &[0x00, 0x01, 0x02, 0x03, 0x04]); diff --git a/src/services/transfer_data.rs b/src/services/transfer_data.rs index f3fed78..d06e0f8 100644 --- a/src/services/transfer_data.rs +++ b/src/services/transfer_data.rs @@ -8,29 +8,29 @@ use crate::{Decode, Encode, Error}; /// 34 .. 11 .. 33 .. 60 20 00 .. 00 FF FF << -- Bytes sent by the client /// RID .. DFI .. ALFID .. `MA_B`# .. `UCMS_B`# /// -/// Step 1 Response: The server sends a [`RequestDownloadResponseTx`](crate::RequestDownloadResponseTx) or `RequestUploadResponse` message to the client +/// Step 1 Response: The server sends a [`RequestDownloadResponse`](crate::RequestDownloadResponse) or `RequestUploadResponse` message to the client /// -/// Step 2: The client shall send many [`TransferDataRequestTx`] messages written in blocks +/// Step 2: The client shall send many [`TransferDataRequest`] messages written in blocks /// to the server with a max number of bytes equal to `MNROB_B`# from the `RequestDownloadResponse` message /// 74 .. 20 .. 00 81 /// RSID .. LFID .. `MNROB_B`# /// -/// Step 2 Response: The server sends a [`TransferDataResponseTx`] message confirming the block sequence +/// Step 2 Response: The server sends a [`TransferDataResponse`] message confirming the block sequence /// /// Step 3: The client sends a [`crate::UdsServiceType::RequestTransferExit`] message to the server (SID 0x37) /// /// Step 3 Response: The server sends a [`crate::UdsServiceType::RequestTransferExit`] response message to the client (RID 0x77) /// -/// Zero-alloc TX request to transfer data. Borrows from the caller. +/// Zero-alloc request to transfer data. Borrows from the caller. #[derive(Clone, Copy, Debug, PartialEq)] -pub struct TransferDataRequestTx<'d> { +pub struct TransferDataRequest<'d> { /// Block sequence counter (wraps 0xFF → 0x00). pub block_sequence_counter: u8, /// The data to be transferred. pub data: &'d [u8], } -impl<'d> TransferDataRequestTx<'d> { +impl<'d> TransferDataRequest<'d> { /// Create a new transfer data request. #[must_use] pub const fn new(block_sequence_counter: u8, data: &'d [u8]) -> Self { @@ -41,7 +41,7 @@ impl<'d> TransferDataRequestTx<'d> { } } -impl Encode for TransferDataRequestTx<'_> { +impl Encode for TransferDataRequest<'_> { fn encoded_size(&self) -> usize { 1 + self.data.len() } @@ -55,7 +55,7 @@ impl Encode for TransferDataRequestTx<'_> { } } -impl<'a> Decode<'a> for TransferDataRequestTx<'a> { +impl<'a> Decode<'a> for TransferDataRequest<'a> { fn decode(buf: &'a [u8]) -> Result<(Self, &'a [u8]), Error> { if buf.is_empty() { return Err(Error::InsufficientData(1)); @@ -70,16 +70,16 @@ impl<'a> Decode<'a> for TransferDataRequestTx<'a> { } } -/// Zero-alloc TX response for transfer data. Borrows from the caller. +/// Zero-alloc response for transfer data. Borrows from the caller. #[derive(Clone, Copy, Debug, PartialEq)] -pub struct TransferDataResponseTx<'d> { +pub struct TransferDataResponse<'d> { /// Echo of the block sequence counter. pub block_sequence_counter: u8, /// Response data (vendor-specific). pub data: &'d [u8], } -impl<'d> TransferDataResponseTx<'d> { +impl<'d> TransferDataResponse<'d> { /// Create a new transfer data response. #[must_use] pub const fn new(block_sequence_counter: u8, data: &'d [u8]) -> Self { @@ -90,7 +90,7 @@ impl<'d> TransferDataResponseTx<'d> { } } -impl Encode for TransferDataResponseTx<'_> { +impl Encode for TransferDataResponse<'_> { fn encoded_size(&self) -> usize { 1 + self.data.len() } @@ -104,7 +104,7 @@ impl Encode for TransferDataResponseTx<'_> { } } -impl<'a> Decode<'a> for TransferDataResponseTx<'a> { +impl<'a> Decode<'a> for TransferDataResponse<'a> { fn decode(buf: &'a [u8]) -> Result<(Self, &'a [u8]), Error> { if buf.is_empty() { return Err(Error::InsufficientData(1)); @@ -129,7 +129,7 @@ mod request { #[test] fn test_transfer_data_request() { let data = [0x01, 0x02, 0x03, 0x04]; - let req = TransferDataRequestTx::new(0x01, &data); + let req = TransferDataRequest::new(0x01, &data); assert_eq!(1, req.block_sequence_counter); assert_eq!(req.data, &[0x01, 0x02, 0x03, 0x04]); } @@ -138,7 +138,7 @@ mod request { #[test] fn read_request() { let bytes = [0x01, 0x02, 0x03, 0x04]; - let (req, _) = ::decode(&bytes).unwrap(); + let (req, _) = ::decode(&bytes).unwrap(); let mut written_bytes = Vec::new(); let written = Encode::encode(&req, &mut written_bytes).unwrap(); @@ -159,7 +159,7 @@ mod response { #[test] fn simple_response() { let bytes = [0x01, 0x02, 0x03, 0x04]; - let (resp, _) = ::decode(&bytes).unwrap(); + let (resp, _) = ::decode(&bytes).unwrap(); let mut written_bytes = Vec::new(); let written = Encode::encode(&resp, &mut written_bytes).unwrap(); diff --git a/src/services/write_data_by_identifier.rs b/src/services/write_data_by_identifier.rs index 755d9ad..8e67734 100644 --- a/src/services/write_data_by_identifier.rs +++ b/src/services/write_data_by_identifier.rs @@ -9,19 +9,19 @@ const WRITE_DID_NEGATIVE_RESPONSE_CODES: [NegativeResponseCode; 5] = [ NegativeResponseCode::GeneralProgrammingFailure, ]; -/// Zero-alloc TX request to write data by identifier. Borrows the raw payload from the caller. +/// Zero-alloc request to write data by identifier. Borrows the raw payload from the caller. /// /// The payload is the DID (2 bytes, big-endian) followed by the data record, exactly as /// it appears on the wire after the service byte. /// /// See ISO-14229-1:2020, Section 11.7.2.1 #[derive(Clone, Copy, Debug, Eq, PartialEq)] -pub struct WriteDataByIdentifierRequestTx<'d> { +pub struct WriteDataByIdentifierRequest<'d> { /// The raw payload bytes: DID followed by the data record. pub payload: &'d [u8], } -impl<'d> WriteDataByIdentifierRequestTx<'d> { +impl<'d> WriteDataByIdentifierRequest<'d> { /// Create a new write-by-identifier request from raw payload bytes. #[must_use] pub const fn new(payload: &'d [u8]) -> Self { @@ -35,7 +35,7 @@ impl<'d> WriteDataByIdentifierRequestTx<'d> { } } -impl Encode for WriteDataByIdentifierRequestTx<'_> { +impl Encode for WriteDataByIdentifierRequest<'_> { fn encoded_size(&self) -> usize { self.payload.len() } @@ -107,7 +107,7 @@ mod test { fn test_write_request_encode() { // DID 0xF186 + one data byte 0x01 let payload = [0xF1, 0x86, 0x01]; - let request = WriteDataByIdentifierRequestTx::new(&payload); + let request = WriteDataByIdentifierRequest::new(&payload); let mut buf = [0u8; 8]; let written = Encode::encode(&request, &mut buf.as_mut_slice()).unwrap(); assert_eq!(written, 3); From 88af33f216bc6ccab2dd9e3e67d8d56a12912610 Mon Sep 17 00:00:00 2001 From: Zach Heylmun Date: Wed, 3 Jun 2026 19:15:04 -0400 Subject: [PATCH 54/58] dedup variable-length big-endian integer codec into util helpers --- src/common/mod.rs | 1 + src/common/util.rs | 71 ++++++++++++++++++++++++++ src/services/request_download.rs | 28 ++++------ src/services/request_file_transfer.rs | 73 ++++++--------------------- 4 files changed, 97 insertions(+), 76 deletions(-) diff --git a/src/common/mod.rs b/src/common/mod.rs index d67e277..6301d8e 100644 --- a/src/common/mod.rs +++ b/src/common/mod.rs @@ -38,5 +38,6 @@ pub(crate) use format_identifiers::{ mod util; pub use util::{param_length_u16, param_length_u32, param_length_u64, param_length_u128}; +pub(crate) use util::{read_be_uint, write_be_uint}; mod primitive_generics; diff --git a/src/common/util.rs b/src/common/util.rs index 76317d8..8f63f1e 100644 --- a/src/common/util.rs +++ b/src/common/util.rs @@ -1,4 +1,47 @@ //! Compute the number of bytes needed to represent a value using core +use crate::Error; + +/// Maximum width of a big-endian unsigned integer this codec handles. +const BE_UINT_MAX_BYTES: usize = 16; + +/// Read the first `n` big-endian bytes of `src` as a left-padded `u128`. +/// +/// # Errors +/// Returns [`Error::InsufficientData`] if `src` is shorter than `n`, or +/// [`Error::IncorrectMessageLengthOrInvalidFormat`] if `n > 16`. +pub(crate) fn read_be_uint(src: &[u8], n: usize) -> Result { + if n > BE_UINT_MAX_BYTES { + return Err(Error::IncorrectMessageLengthOrInvalidFormat); + } + if src.len() < n { + return Err(Error::InsufficientData(n)); + } + let mut bytes = [0u8; BE_UINT_MAX_BYTES]; + bytes[BE_UINT_MAX_BYTES - n..].copy_from_slice(&src[..n]); + Ok(u128::from_be_bytes(bytes)) +} + +/// Write the low `n` big-endian bytes of `value` to `writer`, returning `n`. +/// Only the low `n` bytes of `value` are written; higher bytes are discarded. +/// +/// # Errors +/// Returns [`Error::IncorrectMessageLengthOrInvalidFormat`] if `n > 16`, or +/// [`Error::IoError`] if the writer fails. +pub(crate) fn write_be_uint( + value: u128, + n: usize, + writer: &mut impl embedded_io::Write, +) -> Result { + if n > BE_UINT_MAX_BYTES { + return Err(Error::IncorrectMessageLengthOrInvalidFormat); + } + let bytes = value.to_be_bytes(); + writer + .write_all(&bytes[BE_UINT_MAX_BYTES - n..]) + .map_err(Error::io)?; + Ok(n) +} + /// Return the minimum number of bytes needed to represent a `u16` value. #[allow(clippy::cast_possible_truncation)] #[must_use] @@ -28,6 +71,34 @@ pub fn param_length_u128(value: u128) -> u16 { mod tests { use super::*; + #[test] + fn be_uint_roundtrip() { + use crate::common::util::{read_be_uint, write_be_uint}; + let mut buf = [0u8; 16]; + let mut w = buf.as_mut_slice(); + let written = write_be_uint(0x00AB_CDEFu128, 3, &mut w).unwrap(); + assert_eq!(written, 3); + assert_eq!(&buf[..3], &[0xAB, 0xCD, 0xEF]); + let v = read_be_uint(&buf[..3], 3).unwrap(); + assert_eq!(v, 0x00AB_CDEF); + } + + #[test] + fn be_uint_zero_width() { + use crate::common::util::{read_be_uint, write_be_uint}; + let mut buf = [0u8; 4]; + let mut w = buf.as_mut_slice(); + assert_eq!(write_be_uint(0, 0, &mut w).unwrap(), 0); + assert_eq!(read_be_uint(&[], 0).unwrap(), 0); + } + + #[test] + fn read_be_uint_rejects_short_and_overwide() { + use crate::common::util::read_be_uint; + assert!(read_be_uint(&[0x01], 2).is_err()); + assert!(read_be_uint(&[0u8; 17], 17).is_err()); + } + #[test] fn test_bits_needed() { assert_eq!(param_length_u32(0x1234), 2); diff --git a/src/services/request_download.rs b/src/services/request_download.rs index f7fe25f..1f0ef7c 100644 --- a/src/services/request_download.rs +++ b/src/services/request_download.rs @@ -1,6 +1,9 @@ //! `RequestDownload` (0x34) service implementation -use crate::common::{DataFormatIdentifier, LengthFormatIdentifier, MemoryFormatIdentifier}; +use crate::common::{ + DataFormatIdentifier, LengthFormatIdentifier, MemoryFormatIdentifier, read_be_uint, + write_be_uint, +}; use crate::{Decode, Encode, Error, NegativeResponseCode}; const REQUEST_DOWNLOAD_NEGATIVE_RESPONSE_CODES: [NegativeResponseCode; 6] = [ @@ -89,27 +92,19 @@ impl Encode for RequestDownloadRequest { ]) .map_err(Error::io)?; - // Write shortened memory address using a stack buffer instead of Vec - let addr_bytes = self.memory_address.to_be_bytes(); let addr_len = self .address_and_length_format_identifier .memory_address_length as usize; - writer - .write_all(&addr_bytes[8 - addr_len..]) - .map_err(Error::io)?; - - // Write shortened memory size using a stack buffer instead of Vec - let size_bytes = self.memory_size.to_be_bytes(); let size_len = self.address_and_length_format_identifier.memory_size_length as usize; - writer - .write_all(&size_bytes[4 - size_len..]) - .map_err(Error::io)?; + write_be_uint(u128::from(self.memory_address), addr_len, writer)?; + write_be_uint(u128::from(self.memory_size), size_len, writer)?; Ok(self.encoded_size()) } } impl<'a> Decode<'a> for RequestDownloadRequest { + #[allow(clippy::cast_possible_truncation)] fn decode(buf: &'a [u8]) -> Result<(Self, &'a [u8]), Error> { if buf.len() < 2 { return Err(Error::InsufficientData(2)); @@ -123,13 +118,8 @@ impl<'a> Decode<'a> for RequestDownloadRequest { return Err(Error::InsufficientData(total)); } - let mut addr_bytes = [0u8; 8]; - addr_bytes[8 - addr_len..].copy_from_slice(&buf[2..2 + addr_len]); - let memory_address = u64::from_be_bytes(addr_bytes); - - let mut size_bytes = [0u8; 4]; - size_bytes[4 - size_len..].copy_from_slice(&buf[2 + addr_len..total]); - let memory_size = u32::from_be_bytes(size_bytes); + let memory_address = read_be_uint(&buf[2..], addr_len)? as u64; + let memory_size = read_be_uint(&buf[2 + addr_len..], size_len)? as u32; Ok(( Self { diff --git a/src/services/request_file_transfer.rs b/src/services/request_file_transfer.rs index 16b583d..50cc336 100644 --- a/src/services/request_file_transfer.rs +++ b/src/services/request_file_transfer.rs @@ -1,6 +1,6 @@ //! `RequestFileTransfer` (0x38) service implementation -use crate::common::DataFormatIdentifier; +use crate::common::{DataFormatIdentifier, read_be_uint, write_be_uint}; use crate::{Decode, Encode, Error}; ///////////////////////////////////////// - Request - /////////////////////////////////////////////////// @@ -358,9 +358,6 @@ pub enum RequestFileTransferResponse<'a> { // Encode / Decode impls // --------------------------------------------------------------------------- -// `file_size_parameter_length` must fit in a u128 (≤ 16 bytes per value). -const U128_MAX_BYTES: usize = 16; - impl Encode for NamePayload<'_> { fn encoded_size(&self) -> usize { 1 + 2 + self.file_path_and_name.len() @@ -412,20 +409,11 @@ impl Encode for SizePayload { fn encode(&self, writer: &mut impl embedded_io::Write) -> Result { let n = self.file_size_parameter_length as usize; - if n > U128_MAX_BYTES { - return Err(Error::IncorrectMessageLengthOrInvalidFormat); - } writer .write_all(&[self.file_size_parameter_length]) .map_err(Error::io)?; - let uncompressed = self.file_size_uncompressed.to_be_bytes(); - let compressed = self.file_size_compressed.to_be_bytes(); - writer - .write_all(&uncompressed[U128_MAX_BYTES - n..]) - .map_err(Error::io)?; - writer - .write_all(&compressed[U128_MAX_BYTES - n..]) - .map_err(Error::io)?; + write_be_uint(self.file_size_uncompressed, n, writer)?; + write_be_uint(self.file_size_compressed, n, writer)?; Ok(self.encoded_size()) } } @@ -437,22 +425,17 @@ impl<'a> Decode<'a> for SizePayload { } let file_size_parameter_length = buf[0]; let n = file_size_parameter_length as usize; - if n > U128_MAX_BYTES { - return Err(Error::IncorrectMessageLengthOrInvalidFormat); - } let total = 1 + 2 * n; if buf.len() < total { return Err(Error::InsufficientData(total)); } - let mut u_bytes = [0u8; U128_MAX_BYTES]; - u_bytes[U128_MAX_BYTES - n..].copy_from_slice(&buf[1..=n]); - let mut c_bytes = [0u8; U128_MAX_BYTES]; - c_bytes[U128_MAX_BYTES - n..].copy_from_slice(&buf[1 + n..total]); + let file_size_uncompressed = read_be_uint(&buf[1..], n)?; + let file_size_compressed = read_be_uint(&buf[1 + n..], n)?; Ok(( Self { file_size_parameter_length, - file_size_uncompressed: u128::from_be_bytes(u_bytes), - file_size_compressed: u128::from_be_bytes(c_bytes), + file_size_uncompressed, + file_size_compressed, }, &buf[total..], )) @@ -503,20 +486,11 @@ impl Encode for FileSizePayload { fn encode(&self, writer: &mut impl embedded_io::Write) -> Result { let n = self.file_size_parameter_length as usize; - if n > U128_MAX_BYTES { - return Err(Error::IncorrectMessageLengthOrInvalidFormat); - } writer .write_all(&self.file_size_parameter_length.to_be_bytes()) .map_err(Error::io)?; - let uncompressed = self.file_size_uncompressed.to_be_bytes(); - let compressed = self.file_size_compressed.to_be_bytes(); - writer - .write_all(&uncompressed[U128_MAX_BYTES - n..]) - .map_err(Error::io)?; - writer - .write_all(&compressed[U128_MAX_BYTES - n..]) - .map_err(Error::io)?; + write_be_uint(self.file_size_uncompressed, n, writer)?; + write_be_uint(self.file_size_compressed, n, writer)?; Ok(self.encoded_size()) } } @@ -528,22 +502,17 @@ impl<'a> Decode<'a> for FileSizePayload { } let file_size_parameter_length = u16::from_be_bytes([buf[0], buf[1]]); let n = file_size_parameter_length as usize; - if n > U128_MAX_BYTES { - return Err(Error::IncorrectMessageLengthOrInvalidFormat); - } let total = 2 + 2 * n; if buf.len() < total { return Err(Error::InsufficientData(total)); } - let mut u_bytes = [0u8; U128_MAX_BYTES]; - u_bytes[U128_MAX_BYTES - n..].copy_from_slice(&buf[2..2 + n]); - let mut c_bytes = [0u8; U128_MAX_BYTES]; - c_bytes[U128_MAX_BYTES - n..].copy_from_slice(&buf[2 + n..total]); + let file_size_uncompressed = read_be_uint(&buf[2..], n)?; + let file_size_compressed = read_be_uint(&buf[2 + n..], n)?; Ok(( Self { file_size_parameter_length, - file_size_uncompressed: u128::from_be_bytes(u_bytes), - file_size_compressed: u128::from_be_bytes(c_bytes), + file_size_uncompressed, + file_size_compressed, }, &buf[total..], )) @@ -557,16 +526,10 @@ impl Encode for DirSizePayload { fn encode(&self, writer: &mut impl embedded_io::Write) -> Result { let n = self.dir_info_parameter_length as usize; - if n > U128_MAX_BYTES { - return Err(Error::IncorrectMessageLengthOrInvalidFormat); - } writer .write_all(&self.dir_info_parameter_length.to_be_bytes()) .map_err(Error::io)?; - let bytes = self.dir_info_length.to_be_bytes(); - writer - .write_all(&bytes[U128_MAX_BYTES - n..]) - .map_err(Error::io)?; + write_be_uint(self.dir_info_length, n, writer)?; Ok(self.encoded_size()) } } @@ -578,19 +541,15 @@ impl<'a> Decode<'a> for DirSizePayload { } let dir_info_parameter_length = u16::from_be_bytes([buf[0], buf[1]]); let n = dir_info_parameter_length as usize; - if n > U128_MAX_BYTES { - return Err(Error::IncorrectMessageLengthOrInvalidFormat); - } let total = 2 + n; if buf.len() < total { return Err(Error::InsufficientData(total)); } - let mut bytes = [0u8; U128_MAX_BYTES]; - bytes[U128_MAX_BYTES - n..].copy_from_slice(&buf[2..total]); + let dir_info_length = read_be_uint(&buf[2..], n)?; Ok(( Self { dir_info_parameter_length, - dir_info_length: u128::from_be_bytes(bytes), + dir_info_length, }, &buf[total..], )) From 32db349ce18679a424cb38223a23d61590089d0f Mon Sep 17 00:00:00 2001 From: Zach Heylmun Date: Wed, 3 Jun 2026 19:37:56 -0400 Subject: [PATCH 55/58] merge identical signed/unsigned primitive codec macros --- src/common/primitive_generics.rs | 36 +++----------------------------- 1 file changed, 3 insertions(+), 33 deletions(-) diff --git a/src/common/primitive_generics.rs b/src/common/primitive_generics.rs index 2a580a7..3354cf6 100644 --- a/src/common/primitive_generics.rs +++ b/src/common/primitive_generics.rs @@ -1,7 +1,7 @@ use crate::{Decode, Encode, Error}; -/// Implement [`Encode`] and [`Decode`] for unsigned integer primitives (no_std-compatible). -macro_rules! unsigned_primitive_encode_decode { +/// Implement [`Encode`] and [`Decode`] for integer primitives (no_std-compatible). +macro_rules! primitive_encode_decode { ( $($primitive:ty), * ) => { $( impl Encode for $primitive { @@ -28,37 +28,7 @@ macro_rules! unsigned_primitive_encode_decode { }; } -unsigned_primitive_encode_decode!(u8, u16, u32, u64, u128); - -/// Implement [`Encode`] and [`Decode`] for signed integer primitives (no_std-compatible). -macro_rules! signed_primitive_encode_decode { - ( $($primitive:ty), * ) => { - $( - impl Encode for $primitive { - fn encoded_size(&self) -> usize { - core::mem::size_of::<$primitive>() - } - fn encode(&self, writer: &mut impl embedded_io::Write) -> Result { - writer.write_all(&self.to_be_bytes()).map_err(Error::io)?; - Ok(self.encoded_size()) - } - } - impl<'a> Decode<'a> for $primitive { - fn decode(buf: &'a [u8]) -> Result<(Self, &'a [u8]), Error> { - const SIZE: usize = core::mem::size_of::<$primitive>(); - if buf.len() < SIZE { - return Err(Error::InsufficientData(SIZE)); - } - let (head, tail) = buf.split_at(SIZE); - let value = <$primitive>::from_be_bytes(head.try_into().unwrap()); - Ok((value, tail)) - } - } - )* - }; -} - -signed_primitive_encode_decode!(i8, i16, i32, i64, i128); +primitive_encode_decode!(u8, u16, u32, u64, u128, i8, i16, i32, i64, i128); impl Encode for f32 { fn encoded_size(&self) -> usize { From c2da921ee449837ebd9eb3a26787422f0ac98c5e Mon Sep 17 00:00:00 2001 From: Zach Heylmun Date: Wed, 3 Jun 2026 19:47:38 -0400 Subject: [PATCH 56/58] wrap WriteDataByIdentifier request/response in their descriptor types --- src/request.rs | 32 ++++++++++++++++-------- src/response.rs | 27 ++++++++++++++++---- src/services/write_data_by_identifier.rs | 6 +++++ 3 files changed, 50 insertions(+), 15 deletions(-) diff --git a/src/request.rs b/src/request.rs index a4b84cc..6ce2a89 100644 --- a/src/request.rs +++ b/src/request.rs @@ -5,7 +5,7 @@ use crate::{ ClearDiagnosticInfoRequest, CommunicationControlRequest, ControlDTCSettingsRequest, DiagnosticSessionControlRequest, EcuResetRequest, RequestDownloadRequest, RequestFileTransferRequest, SecurityAccessRequest, TesterPresentRequest, - TransferDataRequest, + TransferDataRequest, WriteDataByIdentifierRequest, }, }; @@ -51,8 +51,8 @@ pub enum Request<'a> { TesterPresent(TesterPresentRequest), /// Transfer data request. TransferData(TransferDataRequest<'a>), - /// Write data by identifier request. Raw DID + payload bytes. - WriteDataByIdentifier(&'a [u8]), + /// Write data by identifier request. + WriteDataByIdentifier(WriteDataByIdentifierRequest<'a>), /// A known-but-unmodeled (or unrecognized) service. Carries the service type and /// the raw payload bytes following the service identifier, for pass-through. /// @@ -117,7 +117,9 @@ impl<'a> Decode<'a> for Request<'a> { UdsServiceType::TransferData => { Self::TransferData(::decode_exact(payload)?) } - UdsServiceType::WriteDataByIdentifier => Self::WriteDataByIdentifier(payload), + UdsServiceType::WriteDataByIdentifier => Self::WriteDataByIdentifier( + ::decode_exact(payload)?, + ), _ => Self::Other { service, data: payload, @@ -135,9 +137,8 @@ impl Encode for Request<'_> { Self::ControlDTCSettings(req) => req.encoded_size(), Self::DiagnosticSessionControl(req) => req.encoded_size(), Self::EcuReset(req) => req.encoded_size(), - Self::ReadDataByIdentifier(bytes) - | Self::WriteDataByIdentifier(bytes) - | Self::ReadDTCInfo(bytes) => bytes.len(), + Self::ReadDataByIdentifier(bytes) | Self::ReadDTCInfo(bytes) => bytes.len(), + Self::WriteDataByIdentifier(req) => req.encoded_size(), Self::RequestDownload(req) => req.encoded_size(), Self::RequestFileTransfer(req) => req.encoded_size(), Self::RequestTransferExit => 0, @@ -160,12 +161,11 @@ impl Encode for Request<'_> { Self::ControlDTCSettings(req) => req.encode(writer)?, Self::DiagnosticSessionControl(req) => req.encode(writer)?, Self::EcuReset(req) => req.encode(writer)?, - Self::ReadDataByIdentifier(bytes) - | Self::WriteDataByIdentifier(bytes) - | Self::ReadDTCInfo(bytes) => { + Self::ReadDataByIdentifier(bytes) | Self::ReadDTCInfo(bytes) => { writer.write_all(bytes).map_err(Error::io)?; bytes.len() } + Self::WriteDataByIdentifier(req) => req.encode(writer)?, Self::RequestDownload(req) => req.encode(writer)?, Self::RequestFileTransfer(req) => req.encode(writer)?, Self::RequestTransferExit => 0, @@ -257,6 +257,18 @@ mod tests { assert!(!not_suppressed.is_positive_response_suppressed()); } + #[test] + fn write_data_by_identifier_request_roundtrips() { + // SID 0x2E, DID 0xF190, one data byte 0x01 + let wire = [0x2E, 0xF1, 0x90, 0x01]; + let (req, rest) = Request::decode(&wire).unwrap(); + assert!(rest.is_empty()); + assert!(matches!(req, Request::WriteDataByIdentifier(_))); + let mut buf = [0u8; 8]; + let written = Encode::encode(&req, &mut buf.as_mut_slice()).unwrap(); + assert_eq!(&buf[..written], &wire); + } + #[test] fn unmodeled_service_decodes_to_other() { // 0x23 = ReadMemoryByAddress, enumerated but not modeled. diff --git a/src/response.rs b/src/response.rs index 157c754..a642783 100644 --- a/src/response.rs +++ b/src/response.rs @@ -3,6 +3,7 @@ use crate::{ DiagnosticSessionControlResponse, EcuResetResponse, Encode, Error, NegativeResponse, ReadDTCInfoResponse, RequestDownloadResponse, RequestFileTransferResponse, SecurityAccessResponse, TesterPresentResponse, TransferDataResponse, UdsServiceType, + WriteDataByIdentifierResponse, }; /// Parsed zero-copy UDS response. Borrows from the wire buffer. @@ -47,8 +48,8 @@ pub enum Response<'a> { TesterPresent(TesterPresentResponse), /// Positive response to `TransferData`. TransferData(TransferDataResponse<'a>), - /// Positive response to `WriteDataByIdentifier`. Contains the echoed DID bytes. - WriteDataByIdentifier(&'a [u8]), + /// Positive response to `WriteDataByIdentifier`. Contains the echoed DID. + WriteDataByIdentifier(WriteDataByIdentifierResponse), /// A known-but-unmodeled (or unrecognized) service response. Carries the service /// type and the raw payload bytes following the service identifier. /// @@ -116,7 +117,9 @@ impl<'a> Decode<'a> for Response<'a> { UdsServiceType::TransferData => { Self::TransferData(::decode_exact(payload)?) } - UdsServiceType::WriteDataByIdentifier => Self::WriteDataByIdentifier(payload), + UdsServiceType::WriteDataByIdentifier => Self::WriteDataByIdentifier( + ::decode_exact(payload)?, + ), _ => Self::Other { service, data: payload, @@ -169,7 +172,8 @@ impl Encode for Response<'_> { Self::DiagnosticSessionControl(resp) => resp.encoded_size(), Self::EcuReset(resp) => resp.encoded_size(), Self::NegativeResponse(resp) => resp.encoded_size(), - Self::ReadDataByIdentifier(bytes) | Self::WriteDataByIdentifier(bytes) => bytes.len(), + Self::ReadDataByIdentifier(bytes) => bytes.len(), + Self::WriteDataByIdentifier(resp) => resp.encoded_size(), Self::ReadDTCInfo(resp) => resp.encoded_size(), Self::RequestDownload(resp) => resp.encoded_size(), Self::RequestFileTransfer(resp) => resp.encoded_size(), @@ -194,10 +198,11 @@ impl Encode for Response<'_> { Self::DiagnosticSessionControl(resp) => resp.encode(writer)?, Self::EcuReset(resp) => resp.encode(writer)?, Self::NegativeResponse(resp) => resp.encode(writer)?, - Self::ReadDataByIdentifier(bytes) | Self::WriteDataByIdentifier(bytes) => { + Self::ReadDataByIdentifier(bytes) => { writer.write_all(bytes).map_err(Error::io)?; bytes.len() } + Self::WriteDataByIdentifier(resp) => resp.encode(writer)?, Self::ReadDTCInfo(resp) => resp.encode(writer)?, Self::RequestDownload(resp) => resp.encode(writer)?, Self::RequestFileTransfer(resp) => resp.encode(writer)?, @@ -227,6 +232,18 @@ impl Encode for Response<'_> { mod tests { use super::*; + #[test] + fn write_data_by_identifier_response_roundtrips() { + // SID 0x6E, echoed DID 0xF190 + let wire = [0x6E, 0xF1, 0x90]; + let (resp, rest) = Response::decode(&wire).unwrap(); + assert!(rest.is_empty()); + assert!(matches!(resp, Response::WriteDataByIdentifier(_))); + let mut buf = [0u8; 8]; + let written = Encode::encode(&resp, &mut buf.as_mut_slice()).unwrap(); + assert_eq!(&buf[..written], &wire); + } + #[test] fn unmodeled_response_decodes_to_other() { // 0x63 = ReadMemoryByAddress positive response, not modeled. diff --git a/src/services/write_data_by_identifier.rs b/src/services/write_data_by_identifier.rs index 8e67734..3dc7d35 100644 --- a/src/services/write_data_by_identifier.rs +++ b/src/services/write_data_by_identifier.rs @@ -46,6 +46,12 @@ impl Encode for WriteDataByIdentifierRequest<'_> { } } +impl<'a> Decode<'a> for WriteDataByIdentifierRequest<'a> { + fn decode(buf: &'a [u8]) -> Result<(Self, &'a [u8]), Error> { + Ok((Self { payload: buf }, &[])) + } +} + /// Positive response to `WriteDataByIdentifier`: echoes the DID that was written. /// /// See ISO-14229-1:2020, Section 11.7.3.1 From 2e02659282239ccc06163c6f03aed56c28ccc0d9 Mon Sep 17 00:00:00 2001 From: Zach Heylmun Date: Wed, 3 Jun 2026 19:55:17 -0400 Subject: [PATCH 57/58] wrap RoutineControl in descriptors; round-trip SPRMIB via SuppressablePositiveResponse --- src/request.rs | 47 ++++++------- src/response.rs | 49 ++++++-------- src/services/routine_control.rs | 113 +++++++++++++++++++++++++++++--- 3 files changed, 145 insertions(+), 64 deletions(-) diff --git a/src/request.rs b/src/request.rs index 6ce2a89..7542cfc 100644 --- a/src/request.rs +++ b/src/request.rs @@ -4,8 +4,8 @@ use crate::{ services::{ ClearDiagnosticInfoRequest, CommunicationControlRequest, ControlDTCSettingsRequest, DiagnosticSessionControlRequest, EcuResetRequest, RequestDownloadRequest, - RequestFileTransferRequest, SecurityAccessRequest, TesterPresentRequest, - TransferDataRequest, WriteDataByIdentifierRequest, + RequestFileTransferRequest, RoutineControlRequest, SecurityAccessRequest, + TesterPresentRequest, TransferDataRequest, WriteDataByIdentifierRequest, }, }; @@ -38,13 +38,8 @@ pub enum Request<'a> { RequestFileTransfer(RequestFileTransferRequest<'a>), /// Request transfer exit. RequestTransferExit, - /// Routine control request. Sub-function byte + raw payload. - RoutineControl { - /// Routine control sub-function byte. - sub_function: u8, - /// Raw routine ID + optional payload bytes. - raw_payload: &'a [u8], - }, + /// Routine control request. + RoutineControl(RoutineControlRequest<'a>), /// Security access request. SecurityAccess(SecurityAccessRequest<'a>), /// Tester present request. @@ -100,13 +95,7 @@ impl<'a> Decode<'a> for Request<'a> { ), UdsServiceType::RequestTransferExit => Self::RequestTransferExit, UdsServiceType::RoutineControl => { - if payload.is_empty() { - return Err(Error::InsufficientData(2)); - } - Self::RoutineControl { - sub_function: payload[0], - raw_payload: &payload[1..], - } + Self::RoutineControl(::decode_exact(payload)?) } UdsServiceType::SecurityAccess => { Self::SecurityAccess(::decode_exact(payload)?) @@ -143,7 +132,7 @@ impl Encode for Request<'_> { Self::RequestFileTransfer(req) => req.encoded_size(), Self::RequestTransferExit => 0, Self::Other { data, .. } => data.len(), - Self::RoutineControl { raw_payload, .. } => 1 + raw_payload.len(), + Self::RoutineControl(req) => req.encoded_size(), Self::SecurityAccess(req) => req.encoded_size(), Self::TesterPresent(req) => req.encoded_size(), Self::TransferData(req) => req.encoded_size(), @@ -173,14 +162,7 @@ impl Encode for Request<'_> { writer.write_all(data).map_err(Error::io)?; data.len() } - Self::RoutineControl { - sub_function, - raw_payload, - } => { - writer.write_all(&[*sub_function]).map_err(Error::io)?; - writer.write_all(raw_payload).map_err(Error::io)?; - 1 + raw_payload.len() - } + Self::RoutineControl(req) => req.encode(writer)?, Self::SecurityAccess(req) => req.encode(writer)?, Self::TesterPresent(req) => req.encode(writer)?, Self::TransferData(req) => req.encode(writer)?, @@ -198,6 +180,7 @@ impl Request<'_> { Self::ControlDTCSettings(req) => req.suppress_positive_response(), Self::DiagnosticSessionControl(req) => req.suppress_positive_response(), Self::EcuReset(req) => req.suppress_positive_response(), + Self::RoutineControl(req) => req.suppress_positive_response(), Self::SecurityAccess(req) => req.suppress_positive_response(), Self::TesterPresent(req) => req.suppress_positive_response(), _ => false, @@ -218,7 +201,7 @@ impl Request<'_> { Self::RequestDownload(_) => UdsServiceType::RequestDownload, Self::RequestFileTransfer(_) => UdsServiceType::RequestFileTransfer, Self::RequestTransferExit => UdsServiceType::RequestTransferExit, - Self::RoutineControl { .. } => UdsServiceType::RoutineControl, + Self::RoutineControl(_) => UdsServiceType::RoutineControl, Self::SecurityAccess(_) => UdsServiceType::SecurityAccess, Self::TesterPresent(_) => UdsServiceType::TesterPresent, Self::TransferData(_) => UdsServiceType::TransferData, @@ -269,6 +252,18 @@ mod tests { assert_eq!(&buf[..written], &wire); } + #[test] + fn routine_control_request_roundtrips_with_suppress_bit() { + // SID 0x31, sub 0x81 (StartRoutine + SPRMIB), RID 0xFF00, param 0xAA + let wire = [0x31, 0x81, 0xFF, 0x00, 0xAA]; + let (req, rest) = Request::decode(&wire).unwrap(); + assert!(rest.is_empty()); + assert!(req.is_positive_response_suppressed()); + let mut buf = [0u8; 8]; + let written = Encode::encode(&req, &mut buf.as_mut_slice()).unwrap(); + assert_eq!(&buf[..written], &wire); + } + #[test] fn unmodeled_service_decodes_to_other() { // 0x23 = ReadMemoryByAddress, enumerated but not modeled. diff --git a/src/response.rs b/src/response.rs index a642783..cc3cead 100644 --- a/src/response.rs +++ b/src/response.rs @@ -2,8 +2,8 @@ use crate::{ CommunicationControlResponse, ControlDTCSettingsResponse, Decode, DiagnosticSessionControlResponse, EcuResetResponse, Encode, Error, NegativeResponse, ReadDTCInfoResponse, RequestDownloadResponse, RequestFileTransferResponse, - SecurityAccessResponse, TesterPresentResponse, TransferDataResponse, UdsServiceType, - WriteDataByIdentifierResponse, + RoutineControlResponse, SecurityAccessResponse, TesterPresentResponse, TransferDataResponse, + UdsServiceType, WriteDataByIdentifierResponse, }; /// Parsed zero-copy UDS response. Borrows from the wire buffer. @@ -35,13 +35,8 @@ pub enum Response<'a> { RequestFileTransfer(RequestFileTransferResponse<'a>), /// Positive response to `RequestTransferExit`. RequestTransferExit, - /// Positive response to `RoutineControl`. Raw status record bytes. - RoutineControl { - /// The routine control sub-function echo. - routine_control_type: u8, - /// Raw routine status record bytes. - raw_status_record: &'a [u8], - }, + /// Positive response to `RoutineControl`. + RoutineControl(RoutineControlResponse<'a>), /// Positive response to `SecurityAccess`. SecurityAccess(SecurityAccessResponse<'a>), /// Positive response to `TesterPresent`. @@ -100,13 +95,7 @@ impl<'a> Decode<'a> for Response<'a> { ), UdsServiceType::RequestTransferExit => Self::RequestTransferExit, UdsServiceType::RoutineControl => { - if payload.is_empty() { - return Err(Error::InsufficientData(2)); - } - Self::RoutineControl { - routine_control_type: payload[0], - raw_status_record: &payload[1..], - } + Self::RoutineControl(::decode_exact(payload)?) } UdsServiceType::SecurityAccess => { Self::SecurityAccess(::decode_exact(payload)?) @@ -150,7 +139,7 @@ impl Response<'_> { Self::RequestDownload(_) => UdsServiceType::RequestDownload.response_to_byte(), Self::RequestFileTransfer(_) => UdsServiceType::RequestFileTransfer.response_to_byte(), Self::RequestTransferExit => UdsServiceType::RequestTransferExit.response_to_byte(), - Self::RoutineControl { .. } => UdsServiceType::RoutineControl.response_to_byte(), + Self::RoutineControl(_) => UdsServiceType::RoutineControl.response_to_byte(), Self::SecurityAccess(_) => UdsServiceType::SecurityAccess.response_to_byte(), Self::TesterPresent(_) => UdsServiceType::TesterPresent.response_to_byte(), Self::TransferData(_) => UdsServiceType::TransferData.response_to_byte(), @@ -177,9 +166,7 @@ impl Encode for Response<'_> { Self::ReadDTCInfo(resp) => resp.encoded_size(), Self::RequestDownload(resp) => resp.encoded_size(), Self::RequestFileTransfer(resp) => resp.encoded_size(), - Self::RoutineControl { - raw_status_record, .. - } => 1 + raw_status_record.len(), + Self::RoutineControl(resp) => resp.encoded_size(), Self::SecurityAccess(resp) => resp.encoded_size(), Self::TesterPresent(resp) => resp.encoded_size(), Self::TransferData(resp) => resp.encoded_size(), @@ -206,16 +193,7 @@ impl Encode for Response<'_> { Self::ReadDTCInfo(resp) => resp.encode(writer)?, Self::RequestDownload(resp) => resp.encode(writer)?, Self::RequestFileTransfer(resp) => resp.encode(writer)?, - Self::RoutineControl { - routine_control_type, - raw_status_record, - } => { - writer - .write_all(&[*routine_control_type]) - .map_err(Error::io)?; - writer.write_all(raw_status_record).map_err(Error::io)?; - 1 + raw_status_record.len() - } + Self::RoutineControl(resp) => resp.encode(writer)?, Self::SecurityAccess(resp) => resp.encode(writer)?, Self::TesterPresent(resp) => resp.encode(writer)?, Self::TransferData(resp) => resp.encode(writer)?, @@ -244,6 +222,17 @@ mod tests { assert_eq!(&buf[..written], &wire); } + #[test] + fn routine_control_response_roundtrips() { + // SID 0x71, sub 0x01, RID 0xFF00, status 0x10 + let wire = [0x71, 0x01, 0xFF, 0x00, 0x10]; + let (resp, rest) = Response::decode(&wire).unwrap(); + assert!(rest.is_empty()); + let mut buf = [0u8; 8]; + let written = Encode::encode(&resp, &mut buf.as_mut_slice()).unwrap(); + assert_eq!(&buf[..written], &wire); + } + #[test] fn unmodeled_response_decodes_to_other() { // 0x63 = ReadMemoryByAddress positive response, not modeled. diff --git a/src/services/routine_control.rs b/src/services/routine_control.rs index a4b9025..c432578 100644 --- a/src/services/routine_control.rs +++ b/src/services/routine_control.rs @@ -2,7 +2,8 @@ //! //! It can also be used to check the ECU's health, erase memory, or other custom manufacturer/supplier routines. //! However, some routines may have side effects or require certain preconditions to be met. -use crate::{Encode, Error, RoutineControlSubFunction}; +use crate::common::SuppressablePositiveResponse; +use crate::{Decode, Encode, Error, RoutineControlSubFunction}; /// Used by a client to execute a defined sequence of events and obtain any relevant results. /// @@ -11,21 +12,44 @@ use crate::{Encode, Error, RoutineControlSubFunction}; #[derive(Clone, Copy, Debug, Eq, PartialEq)] #[non_exhaustive] pub struct RoutineControlRequest<'d> { - /// The routine control operation (start, stop, or request results). - pub sub_function: RoutineControlSubFunction, - /// The raw payload bytes: routine identifier followed by optional parameters. - pub raw_payload: &'d [u8], + sub_function: SuppressablePositiveResponse, + raw_payload: &'d [u8], } impl<'d> RoutineControlRequest<'d> { /// Create a new `RoutineControlRequest`. #[must_use] - pub const fn new(sub_function: RoutineControlSubFunction, raw_payload: &'d [u8]) -> Self { + pub const fn new( + suppress_positive_response: bool, + sub_function: RoutineControlSubFunction, + raw_payload: &'d [u8], + ) -> Self { Self { - sub_function, + sub_function: SuppressablePositiveResponse::new( + suppress_positive_response, + sub_function, + ), raw_payload, } } + + /// Whether the server should suppress the positive response (SPRMIB). + #[must_use] + pub fn suppress_positive_response(&self) -> bool { + self.sub_function.suppress_positive_response() + } + + /// The routine control operation (start, stop, or request results). + #[must_use] + pub fn sub_function(&self) -> RoutineControlSubFunction { + self.sub_function.value() + } + + /// The raw payload bytes: routine identifier followed by optional parameters. + #[must_use] + pub const fn raw_payload(&self) -> &[u8] { + self.raw_payload + } } impl Encode for RoutineControlRequest<'_> { @@ -42,6 +66,22 @@ impl Encode for RoutineControlRequest<'_> { } } +impl<'a> Decode<'a> for RoutineControlRequest<'a> { + fn decode(buf: &'a [u8]) -> Result<(Self, &'a [u8]), Error> { + if buf.is_empty() { + return Err(Error::InsufficientData(1)); + } + let sub_function = SuppressablePositiveResponse::try_from(buf[0])?; + Ok(( + Self { + sub_function, + raw_payload: &buf[1..], + }, + &[], + )) + } +} + /// `RoutineControlResponse` is a variable-length response that can contain routine status. /// /// The status record is the routine identifier echo plus any routine-info / status bytes, @@ -85,16 +125,34 @@ impl Encode for RoutineControlResponse<'_> { } } +impl<'a> Decode<'a> for RoutineControlResponse<'a> { + fn decode(buf: &'a [u8]) -> Result<(Self, &'a [u8]), Error> { + if buf.is_empty() { + return Err(Error::InsufficientData(1)); + } + let routine_control_type = RoutineControlSubFunction::try_from(buf[0])?; + Ok(( + Self { + routine_control_type, + raw_status_record: &buf[1..], + }, + &[], + )) + } +} + #[cfg(test)] mod test { use super::*; + use crate::Decode; use crate::test_util::assert_encode_size_agrees; #[test] fn encode_routine_control_request_tx() { // RID 0xFF00 (EraseMemory) + 1 parameter byte let payload = [0xFF, 0x00, 0xAA]; - let req = RoutineControlRequest::new(RoutineControlSubFunction::StartRoutine, &payload); + let req = + RoutineControlRequest::new(false, RoutineControlSubFunction::StartRoutine, &payload); let mut buf = [0u8; 8]; let written = Encode::encode(&req, &mut buf.as_mut_slice()).unwrap(); assert_eq!(&buf[..written], &[0x01, 0xFF, 0x00, 0xAA]); @@ -110,4 +168,43 @@ mod test { assert_eq!(&buf[..written], &[0x01, 0xFF, 0x00, 0x10]); assert_encode_size_agrees(&resp); } + + #[test] + fn decode_routine_control_request_with_suppress_bit() { + // sub 0x81 = StartRoutine (0x01) + SPRMIB (0x80), then RID 0xFF00 + param 0xAA + let bytes = [0x81, 0xFF, 0x00, 0xAA]; + let (req, rest) = ::decode(&bytes).unwrap(); + assert!(rest.is_empty()); + assert!(req.suppress_positive_response()); + assert_eq!(req.sub_function(), RoutineControlSubFunction::StartRoutine); + assert_eq!(req.raw_payload(), &[0xFF, 0x00, 0xAA]); + // round-trips back to the same bytes + let mut buf = [0u8; 8]; + let written = Encode::encode(&req, &mut buf.as_mut_slice()).unwrap(); + assert_eq!(&buf[..written], &bytes); + assert_encode_size_agrees(&req); + } + + #[test] + fn decode_routine_control_request_rejects_reserved_subfunction() { + // 0x7F (low 7 bits = 0x7F) is a reserved routineControlType + let bytes = [0x7F, 0xFF, 0x00]; + assert!(::decode(&bytes).is_err()); + } + + #[test] + fn decode_routine_control_response() { + let bytes = [0x01, 0xFF, 0x00, 0x10]; + let (resp, rest) = ::decode(&bytes).unwrap(); + assert!(rest.is_empty()); + assert_eq!( + resp.routine_control_type, + RoutineControlSubFunction::StartRoutine + ); + assert_eq!(resp.raw_status_record, &[0xFF, 0x00, 0x10]); + let mut buf = [0u8; 8]; + let written = Encode::encode(&resp, &mut buf.as_mut_slice()).unwrap(); + assert_eq!(&buf[..written], &bytes); + assert_encode_size_agrees(&resp); + } } From c45a0fbfceccb16952d7c17609431a55641535c2 Mon Sep 17 00:00:00 2001 From: Zach Heylmun Date: Wed, 3 Jun 2026 20:06:23 -0400 Subject: [PATCH 58/58] add Decode for DTC params and ReadDTCInfoRequest; wrap Request::ReadDTCInfo --- src/common/dtc_ext_data.rs | 11 ++- src/common/dtc_snapshot.rs | 11 ++- src/common/dtc_status.rs | 27 ++++++ src/request.rs | 23 +++-- src/services/read_dtc_information.rs | 138 ++++++++++++++++++++++++++- 5 files changed, 198 insertions(+), 12 deletions(-) diff --git a/src/common/dtc_ext_data.rs b/src/common/dtc_ext_data.rs index a7c87e9..56d0d2a 100644 --- a/src/common/dtc_ext_data.rs +++ b/src/common/dtc_ext_data.rs @@ -1,4 +1,4 @@ -use crate::{Encode, Error}; +use crate::{Decode, Encode, Error}; /// The `DTCExtDataRecordNumber` is used in the request message to get a stored `DTCExtDataRecord` /// Its used to specify the type of `DTCExtDataRecord` to be reported. @@ -78,6 +78,15 @@ impl Encode for DTCExtDataRecordNumber { } } +impl<'a> Decode<'a> for DTCExtDataRecordNumber { + fn decode(buf: &'a [u8]) -> Result<(Self, &'a [u8]), Error> { + if buf.is_empty() { + return Err(Error::InsufficientData(1)); + } + Ok((Self::new(buf[0]), &buf[1..])) + } +} + // tests #[cfg(test)] mod tests { diff --git a/src/common/dtc_snapshot.rs b/src/common/dtc_snapshot.rs index 9fab1ed..c68eccd 100644 --- a/src/common/dtc_snapshot.rs +++ b/src/common/dtc_snapshot.rs @@ -2,7 +2,7 @@ //! Snapshot data represents a collection of sensor values captured when a DTC is triggered. //! Represents the state of the server at the time the DTC was triggered. -use crate::{Encode, Error}; +use crate::{Decode, Encode, Error}; /// Identifies which DTC snapshot record is being requested or reported. #[cfg_attr(feature = "serde", derive(serde::Deserialize, serde::Serialize))] @@ -56,6 +56,15 @@ impl Encode for DTCSnapshotRecordNumber { } } +impl<'a> Decode<'a> for DTCSnapshotRecordNumber { + fn decode(buf: &'a [u8]) -> Result<(Self, &'a [u8]), Error> { + if buf.is_empty() { + return Err(Error::InsufficientData(1)); + } + Ok((Self::new(buf[0]), &buf[1..])) + } +} + #[cfg(test)] mod snapshot { use super::*; diff --git a/src/common/dtc_status.rs b/src/common/dtc_status.rs index e6bd572..4f96ff7 100644 --- a/src/common/dtc_status.rs +++ b/src/common/dtc_status.rs @@ -340,6 +340,15 @@ impl Encode for FunctionalGroupIdentifier { } } +impl<'a> Decode<'a> for FunctionalGroupIdentifier { + fn decode(buf: &'a [u8]) -> Result<(Self, &'a [u8]), Error> { + if buf.is_empty() { + return Err(Error::InsufficientData(1)); + } + Ok((Self::from(buf[0]), &buf[1..])) + } +} + /// GTR DTC Class Information /// /// Bits 7-5 of the DTCSeverityMask/DTCSeverity parameters contain severity information (optional) @@ -410,6 +419,15 @@ impl Encode for DTCSeverityMask { } } +impl<'a> Decode<'a> for DTCSeverityMask { + fn decode(buf: &'a [u8]) -> Result<(Self, &'a [u8]), Error> { + if buf.is_empty() { + return Err(Error::InsufficientData(1)); + } + Ok((Self::from(buf[0]), &buf[1..])) + } +} + /// Indicates the number of the specific `DTCSnapshot` data record requested /// Setting to 0xFF will return all `DTCStoredDataRecords` at once #[cfg_attr(feature = "serde", derive(serde::Deserialize, serde::Serialize))] @@ -447,6 +465,15 @@ impl Encode for DTCStoredDataRecordNumber { } } +impl<'a> Decode<'a> for DTCStoredDataRecordNumber { + fn decode(buf: &'a [u8]) -> Result<(Self, &'a [u8]), Error> { + if buf.is_empty() { + return Err(Error::InsufficientData(1)); + } + Ok((Self::from(buf[0]), &buf[1..])) + } +} + #[cfg_attr(feature = "serde", derive(serde::Deserialize, serde::Serialize))] #[cfg_attr(feature = "utoipa", derive(utoipa::ToSchema))] #[derive(Clone, Copy, Debug, PartialEq)] diff --git a/src/request.rs b/src/request.rs index 7542cfc..b31dd1a 100644 --- a/src/request.rs +++ b/src/request.rs @@ -3,15 +3,16 @@ use crate::{ Decode, Encode, Error, services::{ ClearDiagnosticInfoRequest, CommunicationControlRequest, ControlDTCSettingsRequest, - DiagnosticSessionControlRequest, EcuResetRequest, RequestDownloadRequest, - RequestFileTransferRequest, RoutineControlRequest, SecurityAccessRequest, - TesterPresentRequest, TransferDataRequest, WriteDataByIdentifierRequest, + DiagnosticSessionControlRequest, EcuResetRequest, ReadDTCInfoRequest, + RequestDownloadRequest, RequestFileTransferRequest, RoutineControlRequest, + SecurityAccessRequest, TesterPresentRequest, TransferDataRequest, + WriteDataByIdentifierRequest, }, }; use super::service::UdsServiceType; -/// Zero-copy RX request. Borrows from the wire buffer. +/// Zero-copy parsed request. Borrows from the wire buffer. /// /// Variable-length payloads are stored as raw `&'a [u8]` slices that can be /// further parsed on demand. @@ -30,8 +31,8 @@ pub enum Request<'a> { EcuReset(EcuResetRequest), /// Read data by identifier request. Raw DID bytes. ReadDataByIdentifier(&'a [u8]), - /// Read DTC information request. Raw sub-function + parameter bytes. - ReadDTCInfo(&'a [u8]), + /// Read DTC information request. + ReadDTCInfo(ReadDTCInfoRequest), /// Request download. RequestDownload(RequestDownloadRequest), /// Request file transfer. @@ -86,7 +87,9 @@ impl<'a> Decode<'a> for Request<'a> { Self::EcuReset(::decode_exact(payload)?) } UdsServiceType::ReadDataByIdentifier => Self::ReadDataByIdentifier(payload), - UdsServiceType::ReadDTCInfo => Self::ReadDTCInfo(payload), + UdsServiceType::ReadDTCInfo => { + Self::ReadDTCInfo(::decode_exact(payload)?) + } UdsServiceType::RequestDownload => { Self::RequestDownload(::decode_exact(payload)?) } @@ -126,7 +129,8 @@ impl Encode for Request<'_> { Self::ControlDTCSettings(req) => req.encoded_size(), Self::DiagnosticSessionControl(req) => req.encoded_size(), Self::EcuReset(req) => req.encoded_size(), - Self::ReadDataByIdentifier(bytes) | Self::ReadDTCInfo(bytes) => bytes.len(), + Self::ReadDataByIdentifier(bytes) => bytes.len(), + Self::ReadDTCInfo(req) => req.encoded_size(), Self::WriteDataByIdentifier(req) => req.encoded_size(), Self::RequestDownload(req) => req.encoded_size(), Self::RequestFileTransfer(req) => req.encoded_size(), @@ -150,10 +154,11 @@ impl Encode for Request<'_> { Self::ControlDTCSettings(req) => req.encode(writer)?, Self::DiagnosticSessionControl(req) => req.encode(writer)?, Self::EcuReset(req) => req.encode(writer)?, - Self::ReadDataByIdentifier(bytes) | Self::ReadDTCInfo(bytes) => { + Self::ReadDataByIdentifier(bytes) => { writer.write_all(bytes).map_err(Error::io)?; bytes.len() } + Self::ReadDTCInfo(req) => req.encode(writer)?, Self::WriteDataByIdentifier(req) => req.encode(writer)?, Self::RequestDownload(req) => req.encode(writer)?, Self::RequestFileTransfer(req) => req.encode(writer)?, diff --git a/src/services/read_dtc_information.rs b/src/services/read_dtc_information.rs index 0e7a3d3..ecc80a8 100644 --- a/src/services/read_dtc_information.rs +++ b/src/services/read_dtc_information.rs @@ -39,6 +39,114 @@ impl Encode for ReadDTCInfoRequest { } } +impl<'a> Decode<'a> for ReadDTCInfoRequest { + #[allow(clippy::too_many_lines)] + fn decode(buf: &'a [u8]) -> Result<(Self, &'a [u8]), Error> { + use ReadDTCInfoSubFunction as S; + if buf.is_empty() { + return Err(Error::InsufficientData(1)); + } + let sub = buf[0]; + let rest = &buf[1..]; + let (dtc_subfunction, rest) = match sub { + 0x01 => { + let (m, r) = DTCStatusMask::decode(rest)?; + (S::ReportNumberOfDTC_ByStatusMask(m), r) + } + 0x02 => { + let (m, r) = DTCStatusMask::decode(rest)?; + (S::ReportDTC_ByStatusMask(m), r) + } + 0x03 => (S::ReportDTCSnapshotIdentification, rest), + 0x04 => { + let (rec, r) = DTCRecord::decode(rest)?; + let (n, r) = DTCSnapshotRecordNumber::decode(r)?; + (S::ReportDTCSnapshotRecord_ByDTCNumber(rec, n), r) + } + 0x05 => { + let (n, r) = DTCStoredDataRecordNumber::decode(rest)?; + (S::ReportDTCStoredData_ByRecordNumber(n), r) + } + 0x06 => { + let (rec, r) = DTCRecord::decode(rest)?; + let (n, r) = DTCExtDataRecordNumber::decode(r)?; + (S::ReportDTCExtDataRecord_ByDTCNumber(rec, n), r) + } + 0x07 => { + let (s, r) = DTCSeverityMask::decode(rest)?; + let (m, r) = DTCStatusMask::decode(r)?; + (S::ReportNumberOfDTC_BySeverityMaskRecord(s, m), r) + } + 0x08 => { + let (s, r) = DTCSeverityMask::decode(rest)?; + let (m, r) = DTCStatusMask::decode(r)?; + (S::ReportDTC_BySeverityMaskRecord(s, m), r) + } + 0x09 => { + let (rec, r) = DTCRecord::decode(rest)?; + (S::ReportSeverityInfoOfDTC(rec), r) + } + 0x0A => (S::ReportSupportedDTC, rest), + 0x0B => (S::ReportFirstTestFailedDTC, rest), + 0x0C => (S::ReportFirstConfirmedDTC, rest), + 0x0D => (S::ReportMostRecentTestFailedDTC, rest), + 0x0E => (S::ReportMostRecentConfirmedDTC, rest), + 0x14 => (S::ReportDTCFaultDetectionCounter, rest), + 0x15 => (S::ReportDTCWithPermanentStatus, rest), + 0x16 => { + let (n, r) = DTCExtDataRecordNumber::decode(rest)?; + (S::ReportDTCExtDataRecord_ByRecordNumber(n), r) + } + 0x17 => { + let (m, r) = DTCStatusMask::decode(rest)?; + (S::ReportUserDefMemoryDTC_ByStatusMask(m), r) + } + 0x18 => { + let (rec, r) = DTCRecord::decode(rest)?; + let (n, r) = DTCSnapshotRecordNumber::decode(r)?; + let (mem, r) = u8::decode(r)?; + ( + S::ReportUserDefMemoryDTCSnapshotRecord_ByDTCNumber(rec, n, mem), + r, + ) + } + 0x19 => { + let (rec, r) = DTCRecord::decode(rest)?; + let (n, r) = DTCExtDataRecordNumber::decode(r)?; + let (mem, r) = u8::decode(r)?; + ( + S::ReportUserDefMemoryDTCExtDataRecord_ByDTCNumber(rec, n, mem), + r, + ) + } + 0x1A => { + let (n, r) = DTCExtDataRecordNumber::decode(rest)?; + (S::ReportSupportedDTCExtDataRecord(n), r) + } + 0x42 => { + let (g, r) = FunctionalGroupIdentifier::decode(rest)?; + let (m, r) = DTCStatusMask::decode(r)?; + let (s, r) = DTCSeverityMask::decode(r)?; + (S::ReportWWHOBDDTC_ByMaskRecord(g, m, s), r) + } + 0x55 => { + let (g, r) = FunctionalGroupIdentifier::decode(rest)?; + (S::ReportWWHOBDDTC_WithPermanentStatus(g), r) + } + 0x56 => { + let (g, r) = FunctionalGroupIdentifier::decode(rest)?; + let (rg, r) = u8::decode(r)?; + ( + S::ReportDTCInformation_ByDTCReadinessGroupIdentifier(g, rg), + r, + ) + } + other => (S::ISOSAEReserved(other), rest), + }; + Ok((ReadDTCInfoRequest::new(dtc_subfunction), rest)) + } +} + #[cfg(test)] mod read_dtc_info_request_encode_tests { use super::*; @@ -88,6 +196,34 @@ mod read_dtc_info_request_encode_tests { assert_eq!(&buf[..written], &[0x57]); assert_encode_size_agrees(&req); } + + #[test] + fn read_dtc_info_request_roundtrips() { + use crate::Decode; + // Encode into a scratch buffer (oracle), then decode_exact and assert round-trip fidelity. + let cases = [ + ReadDTCInfoRequest::new(ReadDTCInfoSubFunction::ReportSupportedDTC), + ReadDTCInfoRequest::new(ReadDTCInfoSubFunction::ReportDTC_ByStatusMask( + DTCStatusMask::from(0xFF), + )), + ReadDTCInfoRequest::new(ReadDTCInfoSubFunction::ReportWWHOBDDTC_ByMaskRecord( + FunctionalGroupIdentifier::EmissionsSystemGroup, + DTCStatusMask::from(0x08), + DTCSeverityMask::CheckImmediately, + )), + ReadDTCInfoRequest::new(ReadDTCInfoSubFunction::ISOSAEReserved(0x57)), + ReadDTCInfoRequest::new(ReadDTCInfoSubFunction::ReportDTCSnapshotRecord_ByDTCNumber( + DTCRecord::new(0x12, 0x34, 0x56), + DTCSnapshotRecordNumber::new(0x01), + )), + ]; + for req in cases { + let mut buf = [0u8; 16]; + let written = Encode::encode(&req, &mut buf.as_mut_slice()).unwrap(); + let decoded = ::decode_exact(&buf[..written]).unwrap(); + assert_eq!(decoded, req); + } + } } /// A DTC paired with its fault detection counter value @@ -520,7 +656,7 @@ impl Iterator for DtcSeverityAndStatusIter<'_> { } } -/// Zero-copy RX response for `ReadDTCInformation` (0x19). +/// Zero-copy parsed response for `ReadDTCInformation` (0x19). /// /// Stores raw bytes for record collections and provides lazy iterators /// that parse on demand without allocation.