peer/connreader.go

@@ -50,9 +50,7 @@ func (r *connReader) Run() {
 
 func (r *connReader) handleNextPacket() {
 	buf := r.buf[:bufferSize]
-	log.Printf("Getting next packet...")
 	n, remoteAddr, err := r.readFromUDPAddrPort(buf)
-	log.Printf("Packet from %v...", remoteAddr)
 	if err != nil {
 		log.Fatalf("Failed to read from UDP port: %v", err)
 	}

peer/hubpoller.go

@@ -51,9 +51,7 @@ func newHubPoller(
 }
 
 func (hp *hubPoller) Run() {
-	log.Printf("Running hub poller...")
 	state, err := loadNetworkState(hp.netName)
-	log.Printf("Got state (%s) : %v", hp.netName, state)
 	if err != nil {
 		log.Printf("Failed to load network state: %v", err)
 		log.Printf("Polling hub...")

peer/mcreader.go

@@ -1,54 +1,70 @@
 package peer
 
-/*
+import (
-type mcReader struct {
+	"log"
-	conn  udpReader
+	"net"
-	super controlMsgHandler
+	"sync/atomic"
-	peers [256]*atomic.Pointer[remotePeer]
+	"time"
+)
 
-	incoming []byte
+func runMCReader(
-	buf      []byte
+	rt *atomic.Pointer[routingTable],
-}
+	handleControlMsg func(destIP byte, msg any),
-
+) {
-func newMCReader(
-	conn udpReader,
-	super controlMsgHandler,
-	peers [256]*atomic.Pointer[remotePeer],
-) *mcReader {
-	return &mcReader{conn, super, peers, newBuf(), newBuf()}
-}
-
-func (r *mcReader) Run() {
 	for {
-		r.handleNextPacket()
+		runMCReader2(rt, handleControlMsg)
+		time.Sleep(8 * time.Second)
 	}
 }
 
-func (r *mcReader) handleNextPacket() {
+func runMCReader2(
-	incoming := r.incoming[:bufferSize]
+	rt *atomic.Pointer[routingTable],
-	n, remoteAddr, err := r.conn.ReadFromUDPAddrPort(incoming)
+	handleControlMsg func(destIP byte, msg any),
+) {
+	var (
+		raw  = newBuf()
+		buf  = newBuf()
+		logf = func(s string, args ...any) {
+			log.Printf("[MCReader] "+s, args...)
+		}
+	)
+
+	conn, err := net.ListenMulticastUDP("udp", nil, multicastAddr)
 	if err != nil {
-		log.Fatalf("Failed to read from UDP multicast port: %v", err)
+		logf("Failed to bind to multicast address: %v", err)
-	}
-	incoming = incoming[:n]
-
-	h, ok := headerFromLocalDiscoveryPacket(incoming)
-	if !ok {
 		return
 	}
 
-	peer := r.peers[h.SourceIP].Load()
+	for {
-	if peer == nil || peer.PubSignKey == nil {
+		conn.SetReadDeadline(time.Now().Add(32 * time.Second))
-		return
+		n, remoteAddr, err := conn.ReadFromUDPAddrPort(raw[:bufferSize])
-	}
+		if err != nil {
+			logf("Failed to read from UDP port): %v", err)
+			return
+		}
 
-	if !verifyLocalDiscoveryPacket(incoming, r.buf, peer.PubSignKey) {
+		raw = raw[:n]
-		return
+		h, ok := headerFromLocalDiscoveryPacket(raw)
-	}
+		if !ok {
+			logf("Failed to open discovery packet?")
+			continue
+		}
 
-	r.super.HandleControlMsg(controlMsg[packetLocalDiscovery]{
+		peer := rt.Load().Peers[h.SourceIP]
-		SrcIP:   h.SourceIP,
+		if peer.PubSignKey == nil {
-		SrcAddr: remoteAddr,
+			logf("No signing key for peer %d.", h.SourceIP)
-	})
+			continue
+		}
+
+		if !verifyLocalDiscoveryPacket(raw, buf, peer.PubSignKey) {
+			logf("Invalid signature from peer: %d", h.SourceIP)
+			continue
+		}
+
+		msg := controlMsg[packetLocalDiscovery]{
+			SrcIP:   h.SourceIP,
+			SrcAddr: remoteAddr,
+		}
+		handleControlMsg(h.SourceIP, msg)
+	}
 }
-*/

peer/mcwriter.go

@@ -1,6 +1,10 @@
 package peer
 
 import (
+	"log"
+	"net"
+	"time"
+
 	"golang.org/x/crypto/nacl/sign"
 )
 
@@ -32,22 +36,18 @@ func verifyLocalDiscoveryPacket(pkt, buf []byte, pubSignKey []byte) bool {
 
 // ----------------------------------------------------------------------------
 
-/*
+func runMCWriter(localIP byte, signingKey []byte) {
-type mcWriter struct {
+	discoveryPacket := createLocalDiscoveryPacket(localIP, signingKey)
 
-	conn            mcUDPWriter
+	conn, err := net.ListenMulticastUDP("udp", nil, multicastAddr)
-	discoveryPacket []byte
+	if err != nil {
-}
+		log.Fatalf("Failed to bind to multicast address: %v", err)
+	}
 
-func newMCWriter(conn mcUDPWriter, localIP byte, signingKey []byte) *mcWriter {
+	for range time.Tick(16 * time.Second) {
-	return &mcWriter{
+		_, err := conn.WriteToUDP(discoveryPacket, multicastAddr)
-		conn:            conn,
+		if err != nil {
-		discoveryPacket: createLocalDiscoveryPacket(localIP, signingKey),
+			log.Printf("[MCWriter] Failed to write multicast: %v", err)
+		}
 	}
 }
-
-func (w *mcWriter) SendLocalDiscovery() {
-	if _, err := w.conn.WriteToUDP(w.discoveryPacket, multicastAddr); err != nil {
-		log.Printf("[MCWriter] Failed to write multicast UDP packet: %v", err)
-	}
-  }*/

peer/peer.go

@@ -16,6 +16,8 @@ import (
 )
 
 type peerMain struct {
+	conf       localConfig
+	rt         *atomic.Pointer[routingTable]
 	ifReader   *ifReader
 	connReader *connReader
 	iface      io.Writer
@@ -92,6 +94,8 @@ func newPeerMain(conf peerConfig) *peerMain {
 	}
 
 	return &peerMain{
+		conf:       config,
+		rt:         rtPtr,
 		iface:      iface,
 		ifReader:   ifReader,
 		connReader: connReader,
@@ -104,6 +108,8 @@ func (p *peerMain) Run() {
 	go p.ifReader.Run()
 	go p.connReader.Run()
 	p.super.Start()
+	go runMCWriter(p.conf.PeerIP, p.conf.PrivSignKey)
+	go runMCReader(p.rt, p.super.HandleControlMsg)
 	p.hubPoller.Run()
 }
 

peer/peerstates.go

@@ -70,7 +70,6 @@ func (s *pState) OnPeerUpdate(peer *m.Peer) peerState {
 
 	s.staged.IP = peer.PeerIP
 	s.staged.PubSignKey = peer.PubSignKey
-	log.Printf("New cipher: %x, %x", s.privKey, peer.PubKey)
 	s.staged.ControlCipher = newControlCipher(s.privKey, peer.PubKey)
 	s.staged.DataCipher = newDataCipher()
 

peer/pubaddrs.go

@@ -5,10 +5,12 @@ import (
 	"net/netip"
 	"runtime/debug"
 	"sort"
+	"sync"
 	"time"
 )
 
 type pubAddrStore struct {
+	lock      sync.Mutex
 	localPub  bool
 	localAddr netip.AddrPort
 	lastSeen  map[netip.AddrPort]time.Time
@@ -25,6 +27,9 @@ func newPubAddrStore(localAddr netip.AddrPort) *pubAddrStore {
 }
 
 func (store *pubAddrStore) Store(add netip.AddrPort) {
+	store.lock.Lock()
+	defer store.lock.Unlock()
+
 	if store.localPub {
 		log.Printf("OOPS: Local pub but storage attempt: %s", debug.Stack())
 		return
@@ -42,6 +47,11 @@ func (store *pubAddrStore) Store(add netip.AddrPort) {
 }
 
 func (store *pubAddrStore) Get() (addrs [8]netip.AddrPort) {
+	store.lock.Lock()
+	defer store.lock.Unlock()
+
+	store.clean()
+
 	if store.localPub {
 		addrs[0] = store.localAddr
 		return
@@ -51,7 +61,7 @@ func (store *pubAddrStore) Get() (addrs [8]netip.AddrPort) {
 	return
 }
 
-func (store *pubAddrStore) Clean() {
+func (store *pubAddrStore) clean() {
 	if store.localPub {
 		return
 	}

peer/pubaddrs_test.go

@@ -20,7 +20,7 @@ func TestPubAddrStore(t *testing.T) {
 		time.Sleep(time.Millisecond)
 	}
 
-	s.Clean()
+	s.clean()
 
 	l2 := s.Get()
 	if l2[0] != l[2] || l2[1] != l[1] || l2[2] != l[0] {

peer/routingtable.go

@@ -1,7 +1,6 @@
 package peer
 
 import (
-	"log"
 	"net/netip"
 	"sync/atomic"
 	"time"
@@ -68,8 +67,6 @@ func (p remotePeer) EncryptControlPacket(pkt marshaller, tmp, out []byte) []byte
 		DestIP:   p.IP,
 	}
 
-	log.Printf("Encrypting with header: %#v", h)
-
 	return p.ControlCipher.Encrypt(h, tmp, out)
 }