feat(traceroute): hop-by-hop path probing (ICMP/UDP/TCP, goscapy)#38
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Add a concurrent traceroute tool with ICMP/UDP/TCP SYN probes. All probe construction and reply parsing go through smallnest/goscapy (no hand-rolled byte ordering or checksums). Probes across TTLs and across targets run concurrently, capped by --parallel. - traceroute/ core package + cmd/traceroute entry point - UDP/TCP support --src-port/--fixed-dport/--src-ip/--dst-ip overrides - per-hop min/avg/max RTT and loss, ECMP responders shown inline - ICMP Echo Reply matched by id+seq to avoid concurrent misattribution - Makefile / goreleaser build integration, docs + README updates
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Summary
traceroute/package +cmd/tracerouteentry point — hop-by-hop path probing, no server-side deployment required.--protocol.packet.Dissect); no hand-rolled byte ordering or checksums.--parallel.--src-port,--fixed-dport,--src-ip,--dst-ip.--no-dns).build-traceroute, package, phony),.goreleaser.ymlbuild + archive; docs (docs/traceroute.html, index card) and README/README list updated.Closes #37
Test plan
go build ./...go test -race ./traceroute/...(config validation, hop stats, matcher identity/embedded, port/IP overrides, output formatting)go vet ./traceroute/... ./cmd/traceroute/...cleangofmtcleansudo traceroute 8.8.8.8andsudo traceroute -p tcp/udpproduce correct hops (verified against system traceroute)