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[PR #4314] [client] Use native windows sock opts to avoid routing loops #4195

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opened 2025-11-20 08:07:54 -05:00 by saavagebueno · 0 comments
saavagebueno commented 2025-11-20 08:07:54 -05:00
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Original Pull Request: https://github.com/netbirdio/netbird/pull/4314

State: closed
Merged: Yes

Describe your changes

  • Move util/grpc and util/net to client so internal packages can be accessed
  • Add methods to return the next best interface after the NetBird interface.
  • Use IP_UNICAST_IF sock opt to force the outgoing interface for the NetBird net.Dialer and net.ListenerConfig to avoid routing loops. The interface is picked by the new route lookup method.
  • Some refactoring to avoid import cycles
  • Old behavior is available through NB_USE_LEGACY_ROUTING=true env var

Issue ticket number and link

Stack

Checklist

  • Is it a bug fix
  • Is a typo/documentation fix
  • Is a feature enhancement
  • It is a refactor
  • Created tests that fail without the change (if possible)

By submitting this pull request, you confirm that you have read and agree to the terms of the Contributor License Agreement.

Documentation

Select exactly one:

  • I added/updated documentation for this change
  • Documentation is not needed for this change (explain why)

Interal routing change, no user facing code change

Docs PR URL (required if "docs added" is checked)

Paste the PR link from https://github.com/netbirdio/docs here:

https://github.com/netbirdio/docs/pull/__

**Original Pull Request:** https://github.com/netbirdio/netbird/pull/4314 **State:** closed **Merged:** Yes --- ## Describe your changes - Move `util/grpc` and `util/net` to `client` so `internal` packages can be accessed - Add methods to return the next best interface after the NetBird interface. - Use `IP_UNICAST_IF` sock opt to force the outgoing interface for the NetBird `net.Dialer` and `net.ListenerConfig` to avoid routing loops. The interface is picked by the new route lookup method. - Some refactoring to avoid import cycles - Old behavior is available through `NB_USE_LEGACY_ROUTING=true` env var ## Issue ticket number and link ## Stack <!-- branch-stack --> ### Checklist - [ ] Is it a bug fix - [ ] Is a typo/documentation fix - [x] Is a feature enhancement - [x] It is a refactor - [ ] Created tests that fail without the change (if possible) > By submitting this pull request, you confirm that you have read and agree to the terms of the [Contributor License Agreement](https://github.com/netbirdio/netbird/blob/main/CONTRIBUTOR_LICENSE_AGREEMENT.md). ## Documentation Select exactly one: - [ ] I added/updated documentation for this change - [x] Documentation is **not needed** for this change (explain why) Interal routing change, no user facing code change ### Docs PR URL (required if "docs added" is checked) Paste the PR link from https://github.com/netbirdio/docs here: https://github.com/netbirdio/docs/pull/__
saavagebueno added the pull-request label 2025-11-20 08:07:54 -05:00
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Reference: SVI/netbird#4195
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