Add WSLCContainerNetworkTypeCustom support

[beena352]

Summary of the Pull Request

Add support for WSLCContainerNetworkTypeCustom, allowing containers to attach to user-created WSLC networks.

PR Checklist

• Closes: Link to issue #xxx
• Communication: I've discussed this with core contributors already. If work hasn't been agreed, this work might be rejected
• Tests: Added/updated if needed and all pass
• Localization: All end user facing strings can be localized
• Dev docs: Added/updated if needed
• Documentation updated: If checked, please file a pull request on our docs repo and link it here: #xxx

Detailed Description of the Pull Request / Additional comments

• Uncommented WSLCContainerNetworkTypeCustom = 3 in wslc.idl
• Added HasNetwork() to WSLCSession for validating network existence before Docker calls
• Extended ProcessPortMappings with a Custom branch that validates the network name, checks existence via HasNetwork, and sets the network mode to the custom name. Custom networks allocate VM ports like bridged
• DockerNetworkModeToWSLCNetworkType now returns Custom for unrecognized modes instead of throwing, so container recovery works for custom networks
• Recovery port loop extended to allocate ports for Custom alongside Bridged

Validation Steps Performed

[Copilot]

Pull request overview

Note

Copilot was unable to run its full agentic suite in this review.

Adds support for WSLCContainerNetworkTypeCustom so containers can attach to user-created WSLC networks, including validation and port allocation behavior consistent with bridged networking.

Changes:

• Enables WSLCContainerNetworkTypeCustom in the IDL and wires network name through the launcher/options path.
• Adds WSLCSession::HasNetwork() and uses it to validate custom network existence before container creation.
• Extends port mapping + recovery logic to allocate VM ports for Custom, and adds tests for custom network behavior/error cases.

Reviewed changes

Copilot reviewed 8 out of 8 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
test/windows/WSLCTests.cpp	Adds coverage for launching containers on a custom network and validates error cases.
src/windows/wslcsession/WSLCSession.h	Declares HasNetwork() helper used for custom network validation.
src/windows/wslcsession/WSLCSession.cpp	Implements HasNetwork() with locking around cached networks.
src/windows/wslcsession/WSLCContainer.cpp	Adds custom network branch in port mapping, changes Docker mode parsing behavior, and allocates recovery ports for custom networks.
src/windows/service/inc/wslc.idl	Enables WSLCContainerNetworkTypeCustom = 3.
src/windows/common/WSLCContainerLauncher.h	Adds API to set custom network name and stores it.
src/windows/common/WSLCContainerLauncher.cpp	Propagates container network name into options passed to container creation.
localization/strings/en-US/Resources.resw	Adds user-facing localized string for missing custom network name validation.

[Copilot]

Pull request overview

Copilot reviewed 8 out of 8 changed files in this pull request and generated 2 comments.

[Copilot]

Pull request overview

Copilot reviewed 8 out of 8 changed files in this pull request and generated 1 comment.

[Copilot]

Pull request overview

Copilot reviewed 8 out of 8 changed files in this pull request and generated 1 comment.

[Copilot]

Pull request overview

Copilot reviewed 8 out of 8 changed files in this pull request and generated no new comments.