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wgengine/magicsock: reset favorite address on handshakes

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Updates #92 (not a complete fix; could be better/faster?)

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
This commit is contained in:
Brad Fitzpatrick 2020-02-27 15:06:19 -08:00 committed by David Crawshaw
parent 517a91de75
commit 1abf2da392
1 changed files with 5 additions and 0 deletions
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5
wgengine/magicsock/magicsock.go
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@ -409,6 +409,11 @@ func appendDests(dsts []*net.UDPAddr, as *AddrSet, b []byte) (_ []*net.UDPAddr,
if spray {
as.lastSpray = now
as.stopSpray = now.Add(sprayPeriod)
// Reset our favorite route on new handshakes so we
// can downgrade to a worse path if our better path
// goes away. (https://github.com/tailscale/tailscale/issues/92)
as.curAddr = -1
} else if now.Before(as.stopSpray) {
// We are in the spray window. If it has been sprayFreq since we
// last sprayed a packet, spray this packet.