Brad Fitzpatrick 37903a9056 wgengine/magicsock: fix occasional deadlock on Conn.Close on c.derpStarted ... The deadlock was: * Conn.Close was called, which acquired c.mu * Then this goroutine scheduled: if firstDerp { startGate = c.derpStarted go func() { dc.Connect(ctx) close(c.derpStarted) }() } * The getRegion hook for that derphttp.Client then ran, which also tries to acquire c.mu. This change makes that hook first see if we're already in a closing state and then it can pretend that region doesn't exist.		2020-07-27 12:27:10 -07:00
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magicsock_test.go	wgengine/magicsock: log better with less spam on transition to stopped state	2020-07-27 10:19:17 -07:00
magicsock.go	wgengine/magicsock: fix occasional deadlock on Conn.Close on c.derpStarted	2020-07-27 12:27:10 -07:00