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Use fewer test packets (#840)

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Nate Brown 2023-04-04 13:42:24 -05:00 committed by GitHub
parent 6685856b5d
commit fd99ce9a71
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2 changed files with 21 additions and 9 deletions
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28
connection_manager.go
View File

@ -183,12 +183,6 @@ func (n *connectionManager) doTrafficCheck(localIndex uint32, p, nb, out []byte,
return
}
if n.intf.lightHouse.IsLighthouseIP(hostinfo.vpnIp) {
// We are sending traffic to the lighthouse, let recv_error sort out any issues instead of testing the tunnel
n.trafficTimer.Add(hostinfo.localIndexId, n.checkInterval)
return
}
if _, ok := n.pendingDeletion[hostinfo.localIndexId]; ok {
// We have already sent a test packet and nothing was returned, this hostinfo is dead
hostinfo.logger(n.l).
@ -205,10 +199,26 @@ func (n *connectionManager) doTrafficCheck(localIndex uint32, p, nb, out []byte,
Debug("Tunnel status")
if hostinfo != nil && hostinfo.ConnectionState != nil && mainHostInfo {
if n.punchy.GetTargetEverything() {
// Maybe the remote is sending us packets but our NAT is blocking it and since we are configured to punch to all
// known remotes, go ahead and do that AND send a test packet
if !outTraffic {
// If we aren't sending or receiving traffic then its an unused tunnel and we don't to test the tunnel.
// Just maintain NAT state if configured to do so.
n.sendPunch(hostinfo)
n.trafficTimer.Add(hostinfo.localIndexId, n.checkInterval)
return
}
if n.punchy.GetTargetEverything() {
// This is similar to the old punchy behavior with a slight optimization.
// We aren't receiving traffic but we are sending it, punch on all known
// ips in case we need to re-prime NAT state
n.sendPunch(hostinfo)
}
if n.intf.lightHouse.IsLighthouseIP(hostinfo.vpnIp) {
// We are sending traffic to the lighthouse, let recv_error sort out any issues instead of testing the tunnel
n.trafficTimer.Add(hostinfo.localIndexId, n.checkInterval)
return
}
// Send a test packet to trigger an authenticated tunnel test, this should suss out any lingering tunnel issues

2
connection_manager_test.go
View File

@ -98,6 +98,7 @@ func Test_NewConnectionManagerTest(t *testing.T) {
assert.NotContains(t, nc.in, hostinfo.localIndexId)
// Do another traffic check tick, this host should be pending deletion now
nc.Out(hostinfo.localIndexId)
nc.doTrafficCheck(hostinfo.localIndexId, p, nb, out, time.Now())
assert.Contains(t, nc.pendingDeletion, hostinfo.localIndexId)
assert.NotContains(t, nc.out, hostinfo.localIndexId)
@ -175,6 +176,7 @@ func Test_NewConnectionManagerTest2(t *testing.T) {
assert.NotContains(t, nc.in, hostinfo.localIndexId)
// Do another traffic check tick, this host should be pending deletion now
nc.Out(hostinfo.localIndexId)
nc.doTrafficCheck(hostinfo.localIndexId, p, nb, out, time.Now())
assert.Contains(t, nc.pendingDeletion, hostinfo.localIndexId)
assert.NotContains(t, nc.out, hostinfo.localIndexId)