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net/tstun: block looped disco traffic

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Updates #1526 (maybe fixes? time will tell)

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
This commit is contained in:
Brad Fitzpatrick
2021-09-13 14:21:40 -07:00
committed by Brad Fitzpatrick
parent 3759fb8987
commit dabeda21e0
4 changed files with 82 additions and 0 deletions
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2
wgengine/userspace.go
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@@ -332,6 +332,8 @@ func NewUserspaceEngine(logf logger.Logf, conf Config) (_ Engine, reterr error)
closePool.add(e.magicConn)
e.magicConn.SetNetworkUp(e.linkMon.InterfaceState().AnyInterfaceUp())
tsTUNDev.SetDiscoKey(e.magicConn.DiscoPublicKey())
if conf.RespondToPing {
e.tundev.PostFilterIn = echoRespondToAll
}