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[client] Fix iOS DNS upstream routing for deselected exit nodes (#5803)

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- Add GetSelectedClientRoutes() to the route manager that filters through FilterSelectedExitNodes, returning only active routes instead of all management routes              
  - Use GetSelectedClientRoutes() in the DNS route checker so deselected exit nodes' 0.0.0.0/0 no longer matches upstream DNS IPs — this prevented the resolver from switching
  away from the utun-bound socket after exit node deselection                                                                                                                   
  - Initialize iOS DNS server with host DNS fallback addresses (1.1.1.1:53, 1.0.0.1:53) and a permanent root zone handler, matching Android's behavior — without this, unmatched
   DNS queries arriving via the 0.0.0.0/0 tunnel route had no handler and were silently dropped
This commit is contained in:
Maycon Santos
2026-04-08 08:43:48 +02:00
committed by GitHub
parent cb73b94ffb
commit e2c2f64be7
5 changed files with 13 additions and 3 deletions
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6
client/ios/NetBirdSDK/client.go
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@@ -161,7 +161,11 @@ func (c *Client) Run(fd int32, interfaceName string, envList *EnvList) error {
cfg.WgIface = interfaceName
c.connectClient = internal.NewConnectClient(ctx, cfg, c.recorder)
return c.connectClient.RunOniOS(fd, c.networkChangeListener, c.dnsManager, c.stateFile)
hostDNS := []netip.AddrPort{
netip.MustParseAddrPort("9.9.9.9:53"),
netip.MustParseAddrPort("149.112.112.112:53"),
}
return c.connectClient.RunOniOS(fd, c.networkChangeListener, c.dnsManager, hostDNS, c.stateFile)
}
// Stop the internal client and free the resources