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net/tstun,wgengine: split PreFilterOut into multiple hooks

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A subsequent commit implements handling of magicDNS traffic via netstack.
Implementing this requires a hook for traffic originating from the host and
hitting the tun, so we make another hook to support this.

Signed-off-by: Tom DNetto <tom@tailscale.com>
This commit is contained in:
Tom DNetto
2022-04-14 14:59:46 -07:00
committed by Tom
parent 9dee6adfab
commit dc71d3559f
2 changed files with 21 additions and 7 deletions
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2
wgengine/userspace.go
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@ -362,7 +362,7 @@ func NewUserspaceEngine(logf logger.Logf, conf Config) (_ Engine, reterr error)
if conf.RespondToPing {
e.tundev.PostFilterIn = echoRespondToAll
}
e.tundev.PreFilterOut = e.handleLocalPackets
e.tundev.PreFilterFromTunToEngine = e.handleLocalPackets
if envknob.BoolDefaultTrue("TS_DEBUG_CONNECT_FAILURES") {
if e.tundev.PreFilterIn != nil {