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On iOS (and possibly other platforms), sometimes our UDP socket would get stuck in a state where it was bound to an invalid interface (or no interface) after a network reconfiguration. We can detect this by actually checking the error codes from sending our STUN packets. If we completely fail to send any STUN packets, we know something is very broken. So on the next STUN attempt, let's rebind the UDP socket to try to correct any problems. This fixes a problem where iOS would sometimes get stuck using DERP instead of direct connections until the backend was restarted. Fixes #2994 Signed-off-by: Avery Pennarun <apenwarr@tailscale.com> |
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| .. | ||
| debugknobs_ios.go | ||
| debugknobs.go | ||
| discopingpurpose_string.go | ||
| magicsock_test.go | ||
| magicsock.go | ||