Initialise awdl.go from link.go, remove deadlock between awdl.create and link.create, other bits and pieces

src/yggdrasil/awdl.go

@@ -18,6 +18,7 @@ type awdlInterface struct {
 	shutdown chan bool
 	peer     *peer
 	link     *linkInterface
+	stream   stream
 }
 
 func (l *awdl) init(c *Core) error {
@@ -41,6 +42,8 @@ func (l *awdl) create(fromAWDL chan []byte, toAWDL chan []byte, name string) (*a
 		toAWDL:   toAWDL,
 		shutdown: make(chan bool),
 	}
+	intf.stream.init()
+	go intf.handler()
 	l.mutex.Lock()
 	l.interfaces[name] = &intf
 	l.mutex.Unlock()
@@ -71,6 +74,9 @@ func (l *awdl) shutdown(identity string) error {
 }
 
 func (ai *awdlInterface) handler() {
+	inPacket := func(packet []byte) {
+		ai.link.fromlink <- packet
+	}
 	for {
 		select {
 		case <-ai.shutdown:
@@ -78,7 +84,7 @@ func (ai *awdlInterface) handler() {
 		case <-ai.link.shutdown:
 			return
 		case in := <-ai.fromAWDL:
-			ai.link.fromlink <- in
+			ai.stream.write(in, inPacket)
 		case out := <-ai.link.tolink:
 			ai.toAWDL <- out
 		}

src/yggdrasil/core.go

@@ -199,8 +199,8 @@ func (c *Core) Start(nc *config.NodeConfig, log *log.Logger) error {
 		return err
 	}
 
-	if err := c.awdl.init(c); err != nil {
-		c.log.Println("Failed to start AWDL interface")
+	if err := c.link.init(c); err != nil {
+		c.log.Println("Failed to start link interfaces")
 		return err
 	}
 

src/yggdrasil/link.go

@@ -18,6 +18,7 @@ type link struct {
 }
 
 type linkInterface struct {
+	name     string
 	link     *link
 	fromlink chan []byte
 	tolink   chan []byte
@@ -32,55 +33,75 @@ func (l *link) init(c *Core) error {
 	l.interfaces = make(map[string]*linkInterface)
 	l.mutex.Unlock()
 
+	if err := l.core.awdl.init(c); err != nil {
+		l.core.log.Println("Failed to start AWDL interface")
+		return err
+	}
+
 	return nil
 }
 
 func (l *link) create(fromlink chan []byte, tolink chan []byte, name string) (*linkInterface, error) {
+	l.mutex.Lock()
+	defer l.mutex.Unlock()
+	if _, ok := l.interfaces[name]; ok {
+		return nil, errors.New("Interface with this name already exists")
+	}
 	intf := linkInterface{
+		name:     name,
 		link:     l,
 		fromlink: fromlink,
 		tolink:   tolink,
 		shutdown: make(chan bool),
 	}
-	l.mutex.Lock()
-	l.interfaces[name] = &intf
-	l.mutex.Unlock()
+	l.interfaces[intf.name] = &intf
+	go intf.start()
+	return &intf, nil
+}
+
+func (intf *linkInterface) start() {
 	myLinkPub, myLinkPriv := crypto.NewBoxKeys()
 	meta := version_getBaseMetadata()
-	meta.box = l.core.boxPub
-	meta.sig = l.core.sigPub
+	meta.box = intf.link.core.boxPub
+	meta.sig = intf.link.core.sigPub
 	meta.link = *myLinkPub
 	metaBytes := meta.encode()
-	tolink <- metaBytes
-	metaBytes = <-fromlink
+	//intf.link.core.log.Println("start: intf.tolink <- metaBytes")
+	intf.tolink <- metaBytes
+	//intf.link.core.log.Println("finish: intf.tolink <- metaBytes")
+	//intf.link.core.log.Println("start: metaBytes = <-intf.fromlink")
+	metaBytes = <-intf.fromlink
+	//intf.link.core.log.Println("finish: metaBytes = <-intf.fromlink")
 	meta = version_metadata{}
 	if !meta.decode(metaBytes) || !meta.check() {
-		return nil, errors.New("Metadata decode failure")
+		intf.link.core.log.Println("Metadata decode failure")
+		return
 	}
 	base := version_getBaseMetadata()
 	if meta.ver > base.ver || meta.ver == base.ver && meta.minorVer > base.minorVer {
-		return nil, errors.New("Failed to connect to node: " + name + " version: " + fmt.Sprintf("%d.%d", meta.ver, meta.minorVer))
+		intf.link.core.log.Println("Failed to connect to node: " + intf.name + " version: " + fmt.Sprintf("%d.%d", meta.ver, meta.minorVer))
+		return
 	}
 	shared := crypto.GetSharedKey(myLinkPriv, &meta.link)
-	//shared := crypto.GetSharedKey(&l.core.boxPriv, boxPubKey)
-	intf.peer = l.core.peers.newPeer(&meta.box, &meta.sig, shared, name)
-	if intf.peer != nil {
+	intf.peer = intf.link.core.peers.newPeer(&meta.box, &meta.sig, shared, intf.name)
+	if intf.peer == nil {
+		intf.link.mutex.Lock()
+		delete(intf.link.interfaces, intf.name)
+		intf.link.mutex.Unlock()
+		return
+	}
 	intf.peer.linkOut = make(chan []byte, 1) // protocol traffic
 	intf.peer.out = func(msg []byte) {
 		defer func() { recover() }()
 		intf.tolink <- msg
 	} // called by peer.sendPacket()
-		l.core.switchTable.idleIn <- intf.peer.port // notify switch that we're idle
+	intf.link.core.switchTable.idleIn <- intf.peer.port // notify switch that we're idle
 	intf.peer.close = func() {
 		close(intf.fromlink)
 		close(intf.tolink)
 	}
 	go intf.handler()
 	go intf.peer.linkLoop()
-		return &intf, nil
-	}
-	delete(l.interfaces, name)
-	return nil, errors.New("l.core.peers.newPeer failed")
 }
 
 func (l *link) getInterface(identity string) *linkInterface {

src/yggdrasil/stream.go

@@ -9,7 +9,6 @@ import (
 
 type stream struct {
 	buffer []byte
-	cursor int
 }
 
 const streamMsgSize = 2048 + 65535
@@ -18,7 +17,6 @@ var streamMsg = [...]byte{0xde, 0xad, 0xb1, 0x75} // "dead bits"
 
 func (s *stream) init() {
 	s.buffer = make([]byte, 2*streamMsgSize)
-	s.cursor = 0
 }
 
 // This reads from the channel into a []byte buffer for incoming messages. It
@@ -76,36 +74,3 @@ func stream_chopMsg(bs *[]byte) ([]byte, bool, error) {
 	(*bs) = (*bs)[msgEnd:]
 	return msg, true, nil
 }
-
-/*
-func (s *stream) chopMsg() ([]byte, bool, error) {
-	// Returns msg, ok, err
-	if len(s.buffer) < len(streamMsg) {
-		fmt.Println("*** too short")
-		return nil, false, nil
-	}
-	for idx := range streamMsg {
-		if s.buffer[idx] != streamMsg[idx] {
-			fmt.Println("*** bad message")
-			return nil, false, errors.New("bad message")
-		}
-	}
-	msgLen, msgLenLen := wire_decode_uint64((s.buffer)[len(streamMsg):])
-	if msgLen > streamMsgSize {
-		fmt.Println("*** oversized message")
-		return nil, false, errors.New("oversized message")
-	}
-	msgBegin := len(streamMsg) + msgLenLen
-	msgEnd := msgBegin + int(msgLen)
-	if msgLenLen == 0 || len(s.buffer) < msgEnd {
-		// We don't have the full message
-		// Need to buffer this and wait for the rest to come in
-		fmt.Println("*** still waiting")
-		return nil, false, nil
-	}
-	msg := s.buffer[msgBegin:msgEnd]
-	s.buffer = s.buffer[msgEnd:]
-	fmt.Println("*** done")
-	return msg, true, nil
-}
-*/