net/dns: add Plan 9 support

This requires the rsc/plan9 ndb DNS changes for now:

https://9fans.topicbox.com/groups/9fans/T9c9d81b5801a0820/ndb-suffix-specific-dns-changes
e8c148ff09
1d0642ae49

Updates #5794

Change-Id: I0e242c1fe7bb4404e23604e03a31f89f0d18e70d
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
This commit is contained in:
Brad Fitzpatrick
2025-04-01 04:01:00 -07:00
committed by Brad Fitzpatrick
parent 5e305032a9
commit 84c82ac4be
4 changed files with 269 additions and 2 deletions

View File

@@ -284,7 +284,7 @@ func (m *Manager) compileConfig(cfg Config) (rcfg resolver.Config, ocfg OSConfig
// Deal with trivial configs first.
switch {
case !cfg.needsOSResolver():
case !cfg.needsOSResolver() || runtime.GOOS == "plan9":
// Set search domains, but nothing else. This also covers the
// case where cfg is entirely zero, in which case these
// configs clear all Tailscale DNS settings.