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log the reason for fw drops (#220)

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* log the reason for fw drops

* only prepare log if we will end up sending it
This commit is contained in:
Patrick Bogen 2020-04-10 10:57:21 -07:00 • committed by GitHub
parent fb252db4a1
commit 363c836422
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4 changed files with 39 additions and 25 deletions
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4
outside.go
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@ -280,8 +280,10 @@ func (f *Interface) decryptToTun(hostinfo *HostInfo, messageCounter uint64, out
return
}
if f.firewall.Drop(out, *fwPacket, true, hostinfo, trustedCAs) {
dropReason := f.firewall.Drop(out, *fwPacket, true, hostinfo, trustedCAs)
if dropReason != nil && l.Level >= logrus.DebugLevel {
hostinfo.logger().WithField("fwPacket", fwPacket).
WithField("reason", dropReason).
Debugln("dropping inbound packet")
return
}