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Andrea Gottardo ed1ac799c8 net/captivedetection: set Timeout on net.Dialer (#13613) ... Updates tailscale/tailscale#1634 Updates tailscale/tailscale#13265 Captive portal detection uses a custom `net.Dialer` in its `http.Client`. This custom Dialer ensures that the socket is bound specifically to the Wi-Fi interface. This is crucial because without it, if any default routes are set, the outgoing requests for detecting a captive portal would bypass Wi-Fi and go through the default route instead. The Dialer did not have a Timeout property configured, so the default system timeout was applied. This caused issues in #13265, where we attempted to make captive portal detection requests over an IPsec interface used for Wi-Fi Calling. The call to `connect()` would fail and remain blocked until the system timeout (approximately 1 minute) was reached. In #13598, I simply excluded the IPsec interface from captive portal detection. This was a quick and safe mitigation for the issue. This PR is a follow-up to make the process more robust, by setting a 3 seconds timeout on any connection establishment on any interface (this is the same timeout interval we were already setting on the HTTP client). Signed-off-by: Andrea Gottardo <andrea@gottardo.me>		2 years ago
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captivedetection.go	net/captivedetection: set Timeout on net.Dialer (#13613)	2 years ago
captivedetection_test.go	net/captivedetection: mark TestAllEndpointsAreUpAndReturnExpectedResponse flaky (#13021)	2 years ago
endpoints.go	health: introduce captive-portal-detected Warnable (#12707)	2 years ago
rawconn.go	health: introduce captive-portal-detected Warnable (#12707)	2 years ago
rawconn_apple.go	health: introduce captive-portal-detected Warnable (#12707)	2 years ago