Dylan Bargatze d40b25326c
tailcfg, wgengine/magicsock: disable all UDP relay usage if disable-relay-client is set (#16492)
If the NodeAttrDisableRelayClient node attribute is set, ensures that a node cannot allocate endpoints on a UDP relay server itself, and cannot use newly-discovered paths (via disco/CallMeMaybeVia) that traverse a UDP relay server.

Fixes tailscale/corp#30180

Signed-off-by: Dylan Bargatze <dylan@tailscale.com>
2025-07-09 18:06:58 -04:00
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