nettest: use RoutedInterface for probing network stack capability

The ipv4/ipv6 support capability is done by explicitly listening on
loopback interface. However, it can lead to false positive, especially
for ipv6 case. For example, ipv6 can be enabled, but explicitly disable
for loopback interface (for security, policy ...).

This CL changes probeStack to use another approach, by looking for any
interface that can route IP traffic and in "UP" state. If there's one,
then the platform can do ipv4/ipv6 networking functionality.

Fixes golang/go#57386

Change-Id: If911bc223b52c5a4562d3f61b4ee1032bdbec47c
TryBot-Result: Gopher Robot <>
Auto-Submit: Cuong Manh Le <>
Reviewed-by: Benny Siegert <>
Reviewed-by: Matt Layher <>
Run-TryBot: Cuong Manh Le <>
Reviewed-by: David Chase <>
6 files changed
tree: 902d6bdb42435236711a1d545c0a6b6811cc582c
  1. bpf/
  2. context/
  3. dict/
  4. dns/
  5. html/
  6. http/
  7. http2/
  8. icmp/
  9. idna/
  10. internal/
  11. ipv4/
  12. ipv6/
  13. lif/
  14. nettest/
  15. netutil/
  16. proxy/
  17. publicsuffix/
  18. route/
  19. trace/
  20. webdav/
  21. websocket/
  22. xsrftoken/
  23. .gitattributes
  24. .gitignore
  25. codereview.cfg
  27. go.mod
  28. go.sum

Go Networking

Go Reference

This repository holds supplementary Go networking libraries.


The easiest way to install is to run go get -u You can also manually git clone the repository to $GOPATH/src/

Report Issues / Send Patches

This repository uses Gerrit for code changes. To learn how to submit changes to this repository, see The main issue tracker for the net repository is located at Prefix your issue with “x/net:” in the subject line, so it is easy to find.