peer/pubaddrs.go

@@ -24,22 +24,26 @@ func newPubAddrStore(localAddr netip.AddrPort) *pubAddrStore {
 	}
 }
 
-func (store *pubAddrStore) Store(add netip.AddrPort) {
+func (store *pubAddrStore) Store(addr netip.AddrPort) {
 	if store.localPub {
 		return
 	}
 
+	if !addr.IsValid() {
+		return
+	}
+
+	if addr.Addr().IsPrivate() {
+		return
+	}
+
 	store.lock.Lock()
 	defer store.lock.Unlock()
 
-	if !add.IsValid() {
+	if _, exists := store.lastSeen[addr]; !exists {
-		return
+		store.addrList = append(store.addrList, addr)
 	}
-
+	store.lastSeen[addr] = time.Now()
-	if _, exists := store.lastSeen[add]; !exists {
-		store.addrList = append(store.addrList, add)
-	}
-	store.lastSeen[add] = time.Now()
 	store.sort()
 }
 

peer/state-clientinit.go

@@ -61,13 +61,13 @@ func (s *stateClientInit2) onInit(msg controlMsg[packetInit]) peerState {
 		return s
 	}
 	s.logf("Got INIT version %d.", msg.Packet.Version)
-	return s.nextState()
+	return enterStateClient(s.peerData)
 }
 
 func (s *stateClientInit2) onPing() peerState {
 	if time.Since(s.startedAt) > timeoutInterval {
 		s.logf("Init timeout. Assuming version 1.")
-		return s.nextState()
+		return enterStateClient(s.peerData)
 	}
 
 	s.sendInit()
@@ -83,11 +83,3 @@ func (s *stateClientInit2) sendInit() {
 	}
 	s.Send(s.staged, init)
 }
-
-func (s *stateClientInit2) nextState() peerState {
-	if s.staged.Direct {
-		return enterStateClientDirect2(s.peerData, s.staged.DirectAddr)
-	}
-
-	return enterStateClientRelayed2(s.peerData)
-}

peer/state-clientrelayed.go

@@ -17,10 +17,12 @@ type stateClientRelayed2 struct {
 	probes   map[uint64]sentProbe
 }
 
-func enterStateClientRelayed2(data *peerData) peerState {
+func enterStateClient(data *peerData) peerState {
-	data.staged.Relay = false
+	ip, ipValid := netip.AddrFromSlice(data.peer.PublicIP)
-	data.staged.Direct = false
+
-	data.staged.DirectAddr = netip.AddrPort{}
+	data.staged.Relay = data.peer.Relay && ipValid
+	data.staged.Direct = ipValid
+	data.staged.DirectAddr = netip.AddrPortFrom(ip, data.peer.Port)
 	data.publish(data.staged)
 
 	state := &stateClientRelayed2{
@@ -29,7 +31,7 @@ func enterStateClientRelayed2(data *peerData) peerState {
 		syn: packetSyn{
 			TraceID:       newTraceID(),
 			SharedKey:     data.staged.DataCipher.Key(),
-			Direct:        false,
+			Direct:        data.staged.Direct,
 			PossibleAddrs: data.pubAddrs.Get(),
 		},
 		probes: map[uint64]sentProbe{},
@@ -39,7 +41,7 @@ func enterStateClientRelayed2(data *peerData) peerState {
 
 	data.pingTimer.Reset(pingInterval)
 
-	state.logf("==> ClientRelayed")
+	state.logf("==> Client")
 	return state
 }
 
@@ -52,22 +54,22 @@ func (s *stateClientRelayed2) OnMsg(raw any) peerState {
 	case peerUpdateMsg:
 		return initPeerState(s.peerData, msg.Peer)
 	case controlMsg[packetAck]:
-		return s.onAck(msg)
+		s.onAck(msg)
 	case controlMsg[packetProbe]:
 		return s.onProbe(msg)
 	case controlMsg[packetLocalDiscovery]:
-		return s.onLocalDiscovery(msg)
+		s.onLocalDiscovery(msg)
 	case pingTimerMsg:
 		return s.onPingTimer()
 	default:
 		s.logf("Ignoring message: %v", raw)
-		return s
 	}
+	return s
 }
 
-func (s *stateClientRelayed2) onAck(msg controlMsg[packetAck]) peerState {
+func (s *stateClientRelayed2) onAck(msg controlMsg[packetAck]) {
 	if msg.Packet.TraceID != s.syn.TraceID {
-		return s
+		return
 	}
 
 	s.lastSeen = time.Now()
@@ -78,7 +80,14 @@ func (s *stateClientRelayed2) onAck(msg controlMsg[packetAck]) peerState {
 		s.logf("Got ACK.")
 	}
 
+	if s.staged.Direct {
 		s.pubAddrs.Store(msg.Packet.ToAddr)
+		return
+	}
+
+	// Relayed below.
+
+	s.cleanProbes()
 
 	for _, addr := range msg.Packet.PossibleAddrs {
 		if !addr.IsValid() {
@@ -86,10 +95,6 @@ func (s *stateClientRelayed2) onAck(msg controlMsg[packetAck]) peerState {
 		}
 		s.sendProbeTo(addr)
 	}
-
-	s.cleanProbes()
-
-	return s
 }
 
 func (s *stateClientRelayed2) onPingTimer() peerState {
@@ -105,6 +110,10 @@ func (s *stateClientRelayed2) onPingTimer() peerState {
 }
 
 func (s *stateClientRelayed2) onProbe(msg controlMsg[packetProbe]) peerState {
+	if s.staged.Direct {
+		return s
+	}
+
 	s.cleanProbes()
 
 	sent, ok := s.probes[msg.Packet.TraceID]
@@ -112,16 +121,27 @@ func (s *stateClientRelayed2) onProbe(msg controlMsg[packetProbe]) peerState {
 		return s
 	}
 
+	s.staged.Direct = true
+	s.staged.DirectAddr = sent.Addr
+	s.publish(s.staged)
+
+	s.syn.TraceID = newTraceID()
+	s.syn.Direct = true
+	s.Send(s.staged, s.syn)
+
 	s.logf("Successful probe.")
-	return enterStateClientDirect2(s.peerData, sent.Addr)
+	return s
+}
+
+func (s *stateClientRelayed2) onLocalDiscovery(msg controlMsg[packetLocalDiscovery]) {
+	if s.staged.Direct {
+		return
 	}
 
-func (s *stateClientRelayed2) onLocalDiscovery(msg controlMsg[packetLocalDiscovery]) peerState {
 	// The source port will be the multicast port, so we'll have to
 	// construct the correct address using the peer's listed port.
 	addr := netip.AddrPortFrom(msg.SrcAddr.Addr(), s.peer.Port)
 	s.sendProbeTo(addr)
-	return s
 }
 
 func (s *stateClientRelayed2) cleanProbes() {
@@ -138,5 +158,6 @@ func (s *stateClientRelayed2) sendProbeTo(addr netip.AddrPort) {
 		SentAt: time.Now(),
 		Addr:   addr,
 	}
+	s.logf("Probing %v...", addr)
 	s.SendTo(probe, addr)
 }

peer/state-server.go

@@ -104,6 +104,7 @@ func (s *stateServer2) onSyn(msg controlMsg[packetSyn]) peerState {
 		if !addr.IsValid() {
 			break
 		}
+		s.logf("Probing %v...", addr)
 		s.SendTo(packetProbe{TraceID: newTraceID()}, addr)
 	}
 
@@ -112,6 +113,7 @@ func (s *stateServer2) onSyn(msg controlMsg[packetSyn]) peerState {
 
 func (s *stateServer2) onProbe(msg controlMsg[packetProbe]) peerState {
 	if msg.SrcAddr.IsValid() {
+		s.logf("Probe response %v...", msg.SrcAddr)
 		s.SendTo(packetProbe{TraceID: msg.Packet.TraceID}, msg.SrcAddr)
 	}
 	return s