Some functioning network code

network/default.go

@@ -44,15 +44,17 @@ type network struct {
 
 // lease generates a new lease with a node id/address
 // TODO: use a consensus mechanism, pool or some deterministic
-// unique prefixing method.
+// unique addressing method.
 func (n *network) lease() *pb.Lease {
 	// create the id
 	id := uuid.New().String()
 	// create a timestamp
 	now := time.Now().UnixNano()
-	// create the address
+
+	// create the address by hashing the id and timestamp
 	h := sha256.New()
 	h.Write([]byte(fmt.Sprintf("%s-%d\n", id, now)))
+	// magic new address
 	address := fmt.Sprintf("%x", h.Sum(nil))
 
 	// return the node
@@ -62,6 +64,7 @@ func (n *network) lease() *pb.Lease {
 		Node: &pb.Node{
 			Id:      id,
 			Address: address,
+			Network: n.id,
 		},
 	}
 }
@@ -104,7 +107,10 @@ func (n *network) Connect() (Node, error) {
 	return newNode(n)
 }
 
-// TODO: establish links for peering networks
+// Peer is used to establish a link between two networks.
+// e.g micro.mu connects to example.com and share routes
+// This is done by creating a new node on both networks
+// and creating a link between them.
 func (n *network) Peer(Network) (Link, error) {
 	// New network was created using NewNetwork after receiving routes from a different node
 
@@ -125,9 +131,13 @@ func (n *network) Peer(Network) (Link, error) {
 func newNetwork(opts ...options.Option) *network {
 	options := options.NewOptions(opts...)
 
-	// new network instance
+	// new network instance with defaults
 	net := &network{
+		Options:  options,
 		id:       DefaultId,
+		router:   router.DefaultRouter,
+		proxy:    new(mucp.Proxy),
+		resolver: new(nreg.Resolver),
 	}
 
 	// get network id
@@ -140,24 +150,18 @@ func newNetwork(opts ...options.Option) *network {
 	r, ok := options.Values().Get("network.router")
 	if ok {
 		net.router = r.(router.Router)
-	} else {
-		net.router = router.DefaultRouter
 	}
 
 	// get proxy
 	p, ok := options.Values().Get("network.proxy")
 	if ok {
 		net.proxy = p.(proxy.Proxy)
-	} else {
-		net.proxy = new(mucp.Proxy)
 	}
 
 	// get resolver
 	res, ok := options.Values().Get("network.resolver")
 	if ok {
 		net.resolver = res.(resolver.Resolver)
-	} else {
-		net.resolver = new(nreg.Resolver)
 	}
 
 	return net

network/link.go

@@ -1,30 +1,38 @@
 package network
 
 import (
+	"errors"
+	"fmt"
+	"io"
 	"sync"
 
+	gproto "github.com/golang/protobuf/proto"
+	"github.com/micro/go-micro/codec"
 	pb "github.com/micro/go-micro/network/proto"
+	"github.com/micro/go-micro/transport"
 )
 
 type link struct {
 	// the embedded node
 	*node
 
+	sync.RWMutex
+
 	// the link id
 	id string
 
-	// queue buffer for this link
+	// the send queue to the socket
 	queue chan *Message
 
+	// codec we use to marshal things
+	codec codec.Marshaler
+
 	// the socket for this link
-	socket *socket
+	socket transport.Socket
 
 	// the lease for this link
 	lease *pb.Lease
 
-	// length and weight of the link
-	mtx sync.RWMutex
-
 	// determines the cost of the link
 	// based on queue length and roundtrip
 	length int
@@ -33,25 +41,252 @@ type link struct {
 
 // link methods
 
-// bring up the link
+// process processe messages on the send queue
-func (l *link) up() error {
+func (l *link) process() {
-	// TODO: manage the length/weight of the link
+	for {
-	return l.socket.accept()
+		select {
+		case m := <-l.queue:
+			if err := l.send(m, nil); err != nil {
+				return
+			}
+		}
+	}
 }
 
-// kill the link
+// accept waits for the connect message from the remote end
-func (l *link) down() error {
+// if it receives anything else it throws an error
-	return l.socket.close()
+func (l *link) accept() error {
+	for {
+		m := new(transport.Message)
+		err := l.socket.Recv(m)
+		if err == io.EOF {
+			return nil
+		}
+		if err != nil {
+			return err
+		}
+
+		// TODO: pick a reliable header
+		event := m.Header["Micro-Method"]
+
+		switch event {
+		// connect event
+		case "Connect":
+			// process connect events from network.Connect()
+			// these are new connections to join the network
+
+			// decode the connection event
+			conn := new(pb.Connect)
+			if err := l.codec.Unmarshal(m.Body, conn); err != nil {
+				// skip error
+				continue
+			}
+
+			// get the existing lease if it exists
+			lease := conn.Lease
+			// if there's no lease create a new one
+			if lease == nil {
+				// create a new lease/node
+				lease = l.node.network.lease()
+			}
+
+			// send back a lease offer for the node
+			if err := l.send(&Message{
+				Header: map[string]string{
+					"Micro-Method": "Lease",
+				},
+			}, lease); err != nil {
+				return err
+			}
+
+			// the lease is saved
+			l.Lock()
+			l.lease = lease
+			l.Unlock()
+
+			// we've connected
+			// start processing the messages
+			go l.process()
+
+			return nil
+		case "Close":
+			l.Close()
+			return errors.New("connection closed")
+		default:
+			return errors.New("unknown method: " + event)
+		}
+	}
+}
+
+// connect sends a connect request and waits on a lease.
+// this is for a new connection. in the event we send
+// an existing lease, the same lease should be returned.
+// if it differs then we assume our address for this link
+// is different...
+func (l *link) connect() error {
+	// get the current lease
+	l.RLock()
+	lease := l.lease
+	l.RUnlock()
+
+	// send a lease request
+	if err := l.send(&Message{
+		Header: map[string]string{
+			"Micro-Method": "Connect",
+		},
+	}, &pb.Connect{Lease: lease}); err != nil {
+		return err
+	}
+
+	// create the new things
+	tm := new(Message)
+	newLease := new(pb.Lease)
+
+	// wait for a response, hopefully a lease
+	if err := l.recv(tm, newLease); err != nil {
+		return err
+	}
+
+	event := tm.Header["Micro-Method"]
+
+	// check the method
+	switch event {
+	case "Lease":
+		// save the lease
+		l.Lock()
+		l.lease = newLease
+		l.Unlock()
+
+		// start processing the messages
+		go l.process()
+	case "Close":
+		l.socket.Close()
+		return errors.New("connection closed")
+	default:
+		return errors.New("unable to attain lease")
+	}
+
+	return nil
+}
+
+// send a message over the link
+func (l *link) send(m *Message, v interface{}) error {
+	tm := new(transport.Message)
+	tm.Header = m.Header
+	tm.Body = m.Body
+
+	// set the body if not nil
+	// we're assuming this is network message
+	if v != nil {
+		// encode the data
+		b, err := l.codec.Marshal(v)
+		if err != nil {
+			return err
+		}
+
+		// set the content type
+		tm.Header["Content-Type"] = "application/protobuf"
+		// set the marshalled body
+		tm.Body = b
+	}
+
+	fmt.Printf("link %s sending %+v %+v\n", l.id, m, v)
+
+	// send via the transport socket
+	return l.socket.Send(&transport.Message{
+		Header: m.Header,
+		Body:   m.Body,
+	})
+}
+
+// recv a message on the link
+func (l *link) recv(m *Message, v interface{}) error {
+	if m.Header == nil {
+		m.Header = make(map[string]string)
+	}
+
+	tm := new(transport.Message)
+
+	// receive the transport message
+	if err := l.socket.Recv(tm); err != nil {
+		return err
+	}
+
+	fmt.Printf("link %s receiving %+v %+v\n", l.id, tm, v)
+
+	// set the message
+	m.Header = tm.Header
+	m.Body = tm.Body
+
+	// bail early
+	if v == nil {
+		return nil
+	}
+
+	// try unmarshal the body
+	// skip if there's no content-type
+	if tm.Header["Content-Type"] != "application/protobuf" {
+		return nil
+	}
+
+	// return unmarshalled
+	return l.codec.Unmarshal(m.Body, v.(gproto.Message))
+}
+
+// Close the link
+func (l *link) Close() error {
+	// send a final close message
+	l.socket.Send(&transport.Message{
+		Header: map[string]string{
+			"Micro-Method": "Close",
+		},
+	})
+	// close the socket
+	return l.socket.Close()
+}
+
+// returns the node id
+func (l *link) Id() string {
+	l.RLock()
+	defer l.RUnlock()
+	if l.lease == nil {
+		return ""
+	}
+	return l.lease.Node.Id
+}
+
+// Address of the node we're connected to
+func (l *link) Address() string {
+	l.RLock()
+	defer l.RUnlock()
+	if l.lease == nil {
+		return l.socket.Remote()
+	}
+	// the node in the lease
+	return l.lease.Node.Address
 }
 
 func (l *link) Length() int {
-	l.mtx.RLock()
+	l.RLock()
-	defer l.mtx.RUnlock()
+	defer l.RUnlock()
 	return l.length
 }
 
 func (l *link) Weight() int {
-	l.mtx.RLock()
+	l.RLock()
-	defer l.mtx.RUnlock()
+	defer l.RUnlock()
 	return l.weight
 }
+
+func (l *link) Accept() (*Message, error) {
+	m := new(Message)
+	err := l.recv(m, nil)
+	if err != nil {
+		return nil, err
+	}
+	return m, nil
+}
+
+func (l *link) Send(m *Message) error {
+	return l.send(m, nil)
+}

network/node.go

@@ -1,7 +1,11 @@
 package network
 
 import (
+	"errors"
+	"fmt"
+	"net"
 	"runtime/debug"
+	"strconv"
 	"sync"
 	"time"
 
@@ -9,6 +13,7 @@ import (
 	"github.com/micro/go-micro/codec/proto"
 	"github.com/micro/go-micro/registry"
 	"github.com/micro/go-micro/transport"
+	"github.com/micro/go-micro/util/addr"
 	"github.com/micro/go-micro/util/log"
 
 	pb "github.com/micro/go-micro/network/proto"
@@ -20,7 +25,7 @@ type node struct {
 	// closed channel
 	closed chan bool
 
-	mtx sync.RWMutex
+	sync.RWMutex
 
 	// the node id
 	id string
@@ -40,32 +45,46 @@ type node struct {
 	// leases for connections to us
 	// link id:link
 	links map[string]*link
+
+	// messages received over links
+	recv chan *Message
+	// messages received over links
+	send chan *Message
 }
 
 // network methods
 
 func newNode(n *network) (*node, error) {
 	// create a new node
-	node := new(node)
+	node := &node{
+		// the links
+		links: make(map[string]*link),
 		// closed channel
-	node.closed = make(chan bool)
+		closed: make(chan bool),
 		// set the nodes network
-	node.network = n
+		network: n,
-
+		// set the default transport
-	// initially we have no id
+		transport: transport.DefaultTransport,
-	// create an id and address
+		// set the default registry
-	// TODO: create a real unique id and address
+		registry: registry.DefaultRegistry,
-	// lease := n.lease()
+		// receive channel for accepted connections
-	// set the node id
+		recv: make(chan *Message, 128),
-	// node.id = lease.Node.Id
+		// send channel for accepted connections
+		send: make(chan *Message, 128),
+	}
 
 	// get the transport we're going to use for our tunnels
+	// TODO: set to quic or tunnel or something else
 	t, ok := n.Options.Values().Get("network.transport")
 	if ok {
 		node.transport = t.(transport.Transport)
-	} else {
+	}
-		// TODO: set to quic
+
-		node.transport = transport.DefaultTransport
+	// register the node with the registry for the network
+	// TODO: use a registrar or something else for local things
+	r, ok := n.Options.Values().Get("network.registry")
+	if ok {
+		node.registry = r.(registry.Registry)
 	}
 
 	// we listen on a random address, this is not advertised
@@ -77,8 +96,6 @@ func newNode(n *network) (*node, error) {
 	// set the listener
 	node.listener = l
 
-	// TODO: this should be an overlay address
-	// ideally received via some dhcp style broadcast
 	node.address = l.Addr()
 
 	// TODO: start the router and broadcast advertisements
@@ -90,36 +107,51 @@ func newNode(n *network) (*node, error) {
 
 	// process any incoming messages on the listener
 	// this is our inbound network connection
-	node.accept(l)
+	go node.accept(l)
 
-	// register the node with the registry for the network
+	// process any messages being sent by node.Send
-	// TODO: use a registrar or something else for local things
+	// forwards to every link we have
-	r, ok := n.Options.Values().Get("network.registry")
+	go node.process()
-	if ok {
-		node.registry = r.(registry.Registry)
-	} else {
-		node.registry = registry.DefaultRegistry
-	}
 
 	// lookup the network to see if there's any nodes
 	records := n.lookup(node.registry)
 
-	// should we actually do this?
+	// assuming if there are no records, we are the first
+	// we set ourselves a lease. should we actually do this?
 	if len(records) == 0 {
 		// set your own node id
 		lease := n.lease()
 		node.id = lease.Node.Id
 	}
 
-	// register self with the network registry
+	var port int
+	// TODO: this should be an overlay address
+	// ideally received via some dhcp style broadcast
+	host, pp, err := net.SplitHostPort(l.Addr())
+	if err == nil {
+		pt, _ := strconv.Atoi(pp)
+		port = pt
+	}
+
+	// some horrible things are happening
+	if host == "::" {
+		host = ""
+	}
+	// set the address
+	addr, _ := addr.Extract(host)
+
+	node.address = fmt.Sprintf("%s:%d", addr, port)
+
+	// register self with the registry using network: prefix
 	// this is a local registry of nodes separate to the resolver
 	// maybe consolidate registry/resolver
-	// TODO: find a way to do this via gossip or something else
+	// TODO: find a way to do this via gossip or something like
+	// a registrar or tld or whatever
 	if err := node.registry.Register(&registry.Service{
 		// register with the network id
 		Name: "network:" + n.Id(),
 		Nodes: []*registry.Node{
-			{Id: node.id, Address: node.address},
+			{Id: node.id, Address: addr, Port: port},
 		},
 	}); err != nil {
 		node.Close()
@@ -134,7 +166,20 @@ func newNode(n *network) (*node, error) {
 
 	// wait forever to connect
 	// TODO: do something with the links we receive
-	<-linkChan
+	link := <-linkChan
+
+	// process this link
+	go node.manage(link)
+
+	go func() {
+		// process any further new links
+		select {
+		case l := <-linkChan:
+			go node.manage(l)
+		case <-node.closed:
+			return
+		}
+	}()
 
 	return node, nil
 }
@@ -158,28 +203,82 @@ func (n *node) accept(l transport.Listener) error {
 		}()
 
 		// create a new link
-		// generate a new link
 		link := &link{
-			node: n,
+			// link has a unique id
 			id: uuid.New().String(),
+			// proto marshaler
+			codec: proto.Marshaler{},
+			// link has a socket
+			socket: sock,
+			// for generating leases,
+			node: n,
+			// the send queue,
+			queue: make(chan *Message, 128),
 		}
-		// create a new network socket
-		sk := new(socket)
-		sk.node = n
-		sk.codec = proto.Marshaler{}
-		sk.socket = sock
 
-		// set link socket
+		log.Debugf("Accepting connection from %s", link.socket.Remote())
-		link.socket = sk
 
-		// accept messages on the socket
+		// wait for the link to be connected
-		// blocks forever or until error
+		// the remote end will send "Connect"
-		if err := link.up(); err != nil {
+		// and we will return a "Lease"
-			// TODO: delete link
+		if err := link.accept(); err != nil {
+			return
 		}
+
+		log.Debugf("Accepted link from %s", link.socket.Remote())
+
+		// save with the remote address as the key
+		// where we attempt to connect to nodes
+		// we do not connect to the same thing
+		n.Lock()
+		n.links[link.socket.Remote()] = link
+		n.Unlock()
+
+		// manage the link for its lifetime
+		n.manage(link)
 	})
 }
 
+// processes the send queue
+func (n *node) process() {
+	for {
+		select {
+		case <-n.closed:
+			return
+		// process outbound messages on the send queue
+		// these messages are received from n.Send
+		case m := <-n.send:
+			// queue the message on each link
+			// TODO: more than likely use proxy
+			n.RLock()
+			for _, l := range n.links {
+				l.queue <- m
+			}
+			n.RUnlock()
+		}
+	}
+}
+
+func (n *node) manage(l *link) {
+	// now process inbound messages on the link
+	// assumption is this handles everything else
+	for {
+		// get a message on the link
+		m := new(Message)
+		if err := l.recv(m, nil); err != nil {
+			// ???
+			return
+		}
+
+		select {
+		case <-n.closed:
+			return
+		// send to the recv channel e.g node.Accept()
+		case n.recv <- m:
+		}
+	}
+}
+
 // connect attempts to periodically connect to new nodes in the network.
 // It will only do this if it has less than 3 connections. this method
 // is called by network.Connect and fired in a go routine after establishing
@@ -188,30 +287,37 @@ func (n *node) accept(l transport.Listener) error {
 func (n *node) connect(linkChan chan *link) {
 	// TODO: adjustable ticker
 	t := time.NewTicker(time.Second)
+
 	var lease *pb.Lease
 
 	for {
 		select {
+		// exit when told to do so
+		case <-n.closed:
+			return
 		// on every tick check the number of links and then attempt
 		// to connect to new nodes if we don't have sufficient links
 		case <-t.C:
-			n.mtx.RLock()
+			n.RLock()
 
 			// only start processing if we have less than 3 links
 			if len(n.links) > 2 {
-				n.mtx.RUnlock()
+				n.RUnlock()
 				continue
 			}
 
 			// get a list of link addresses so we don't reconnect
 			// to the ones we're already connected to
 			nodes := map[string]bool{}
-			for _, l := range n.links {
+			for addr, _ := range n.links {
-				nodes[l.lease.Node.Address] = true
+				// id is the lookup address used to connect
+				nodes[addr] = true
 			}
 
-			n.mtx.RUnlock()
+			// unlock our read lock
+			n.RUnlock()
 
+			// lookup records for our network
 			records := n.network.lookup(n.registry)
 
 			// for each record check we haven't already got a connection
@@ -224,53 +330,53 @@ func (n *node) connect(linkChan chan *link) {
 			for _, record := range records {
 				// skip existing connections
 				if nodes[record.Address] {
+					log.Debugf("Skipping connection to %s", record.Address)
 					continue
 				}
 
 				// attempt to connect and create a link
 
+				log.Debugf("Dialing connection to %s", record.Address)
+
 				// connect to the node
-				s, err := n.transport.Dial(record.Address)
+				sock, err := n.transport.Dial(record.Address)
 				if err != nil {
+					log.Debugf("Dialing connection error %v", err)
 					continue
 				}
 
-				// create a new socket
-				sk := &socket{
-					node:   n,
-					codec:  &proto.Marshaler{},
-					socket: s,
-				}
-
-				// broadcast a "connect" request and get back "lease"
-				// this is your tunnel to the outside world and to the network
-				// then push updates and messages over this link
-				// first connect will not have a lease so we get one with node id/address
-				l, err := sk.connect(lease)
-				if err != nil {
-					s.Close()
-					continue
-				}
-
-				// set lease for next time
-				lease = l
-
 				// create a new link with the lease and socket
 				link := &link{
+					codec:  &proto.Marshaler{},
 					id:     uuid.New().String(),
 					lease:  lease,
-					node:   n,
+					socket: sock,
 					queue:  make(chan *Message, 128),
-					socket: sk,
 				}
 
-				// bring up the link
+				log.Debugf("Connecting link to %s", record.Address)
-				go link.up()
 
+				// connect the link:
+				// this broadcasts a "connect" request and gets back a "lease"
+				// this is the tunnel to the outside world and to the network
+				// then push updates and messages over this link
+				// first connect will not have a lease so we get one with node id/address
+				if err := link.connect(); err != nil {
+					// shit
+					link.Close()
+					continue
+				}
+
+				log.Debugf("Connected link to %s", record.Address)
+
+				n.Lock()
+				// set lease for next time we connect to anything else
+				// we want to use the same lease for that. in future
+				// we may have to expire the lease
+				lease = link.lease
 				// save the new link
-				n.mtx.Lock()
+				n.links[link.socket.Remote()] = link
-				n.links[link.id] = link
+				n.Unlock()
-				n.mtx.Unlock()
 
 				// drop this down the link channel to the network
 				// so it can manage the links
@@ -280,8 +386,6 @@ func (n *node) connect(linkChan chan *link) {
 				default:
 				}
 			}
-		case <-n.closed:
-			return
 		}
 	}
 }
@@ -296,14 +400,17 @@ func (n *node) Close() error {
 	case <-n.closed:
 		return nil
 	default:
+		// mark as closed
 		close(n.closed)
+
 		// shutdown all the links
-		n.mtx.Lock()
+		n.Lock()
 		for id, link := range n.links {
-			link.down()
+			link.Close()
 			delete(n.links, id)
 		}
-		n.mtx.Unlock()
+		n.Unlock()
+
 		// deregister self
 		n.registry.Deregister(&registry.Service{
 			Name: "network:" + n.network.Id(),
@@ -311,14 +418,29 @@ func (n *node) Close() error {
 				{Id: n.id, Address: n.address},
 			},
 		})
+
+		// shutdown the listener
 		return n.listener.Close()
 	}
 	return nil
 }
 
+// Accept receives the incoming messages from all links
 func (n *node) Accept() (*Message, error) {
 	// process the inbound cruft
-
+	for {
+		select {
+		case m, ok := <-n.recv:
+			if !ok {
+				return nil, errors.New("connection closed")
+			}
+			// return the message
+			return m, nil
+		case <-n.closed:
+			return nil, errors.New("connection closed")
+		}
+	}
+	// we never get here
 	return nil, nil
 }
 
@@ -326,22 +448,13 @@ func (n *node) Network() string {
 	return n.network.id
 }
 
+// Send propagates a message over all links. This should probably use its proxy.
 func (n *node) Send(m *Message) error {
-	n.mtx.RLock()
+	select {
-	defer n.mtx.RUnlock()
+	case <-n.closed:
-
+		return errors.New("connection closed")
-	var gerr error
+	case n.send <- m:
-
+		// send the message
-	// send to all links
-	// TODO: be smarter
-	for _, link := range n.links {
-		// TODO: process the error, do some link flap detection
-		// blackhole the connection, etc
-		if err := link.socket.send(m, nil); err != nil {
-			gerr = err
-			continue
 	}
-	}
+	return nil
-
-	return gerr
 }

network/resolver/registry/registry.go

@@ -2,6 +2,8 @@
 package registry
 
 import (
+	"fmt"
+
 	"github.com/micro/go-micro/network/resolver"
 	"github.com/micro/go-micro/registry"
 )
@@ -27,8 +29,13 @@ func (r *Resolver) Resolve(id string) ([]*resolver.Record, error) {
 
 	for _, service := range services {
 		for _, node := range service.Nodes {
+			addr := node.Address
+			// such a hack
+			if node.Port > 0 {
+				addr = fmt.Sprintf("%s:%d", node.Address, node.Port)
+			}
 			records = append(records, &resolver.Record{
-				Address: node.Address,
+				Address: addr,
 			})
 		}
 	}

network/socket.go

@@ -1,176 +0,0 @@
-package network
-
-import (
-	"io"
-
-	gproto "github.com/golang/protobuf/proto"
-	"github.com/google/uuid"
-	"github.com/micro/go-micro/codec"
-	"github.com/micro/go-micro/transport"
-
-	pb "github.com/micro/go-micro/network/proto"
-)
-
-type socket struct {
-	node   *node
-	codec  codec.Marshaler
-	socket transport.Socket
-}
-
-func (s *socket) close() error {
-	return s.socket.Close()
-}
-
-// accept is the state machine that processes messages on the socket
-func (s *socket) accept() error {
-	for {
-		m := new(transport.Message)
-		err := s.socket.Recv(m)
-		if err == io.EOF {
-			return nil
-		}
-		if err != nil {
-			return err
-		}
-
-		// TODO: pick a reliable header
-		event := m.Header["Micro-Method"]
-
-		switch event {
-		// connect event
-		case "connect":
-			// process connect events from network.Connect()
-			// these are new connections to join the network
-
-			// decode the connection event
-			conn := new(pb.Connect)
-			if err := s.codec.Unmarshal(m.Body, conn); err != nil {
-				// skip error
-				continue
-			}
-
-			// get the existing lease if it exists
-			lease := conn.Lease
-			if lease == nil {
-				// create a new lease/node
-				lease = s.node.network.lease()
-			}
-
-			// send back a lease offer for the node
-			if err := s.send(&Message{
-				Header: map[string]string{
-					"Micro-Method": "lease",
-				},
-			}, lease); err != nil {
-				return err
-			}
-
-			// record this mapping of socket to node/lease
-			s.node.mtx.Lock()
-			id := uuid.New().String()
-			s.node.links[id] = &link{
-				node:   s.node,
-				id:     id,
-				lease:  lease,
-				queue:  make(chan *Message, 128),
-				socket: s,
-			}
-			s.node.mtx.Unlock()
-		// a route update
-		case "route":
-			// process router events
-
-		// received a lease
-		case "lease":
-		// no op as we don't process lease events on existing connections
-		// these are in response to a connect message
-		default:
-			// process all other messages
-		}
-	}
-}
-
-// connect sends a connect request and waits on a lease.
-// this is for a new connection. in the event we send
-// an existing lease, the same lease should be returned.
-// if it differs then we assume our address for this link
-// is different...
-func (s *socket) connect(l *pb.Lease) (*pb.Lease, error) {
-	// send a lease request
-	if err := s.send(&Message{
-		Header: map[string]string{
-			"Micro-Method": "connect",
-		},
-	}, &pb.Connect{Lease: l}); err != nil {
-		return nil, err
-	}
-
-	// create the new things
-	tm := new(Message)
-	lease := new(pb.Lease)
-
-	// wait for a lease response
-	if err := s.recv(tm, lease); err != nil {
-		return nil, err
-	}
-
-	return lease, nil
-}
-
-func (s *socket) send(m *Message, v interface{}) error {
-	tm := new(transport.Message)
-	tm.Header = m.Header
-	tm.Body = m.Body
-
-	// set the body if not nil
-	// we're assuming this is network message
-	if v != nil {
-		// encode the data
-		b, err := s.codec.Marshal(v)
-		if err != nil {
-			return err
-		}
-
-		// set the content type
-		tm.Header["Content-Type"] = "application/protobuf"
-		// set the marshalled body
-		tm.Body = b
-	}
-
-	// send via the transport socket
-	return s.socket.Send(&transport.Message{
-		Header: m.Header,
-		Body:   m.Body,
-	})
-}
-
-func (s *socket) recv(m *Message, v interface{}) error {
-	if m.Header == nil {
-		m.Header = make(map[string]string)
-	}
-
-	tm := new(transport.Message)
-
-	// receive the transport message
-	if err := s.socket.Recv(tm); err != nil {
-		return err
-	}
-
-	// set the message
-	m.Header = tm.Header
-	m.Body = tm.Body
-
-	// bail early
-	if v == nil {
-		return nil
-	}
-
-	// try unmarshal the body
-	// skip if there's no content-type
-	if tm.Header["Content-Type"] != "application/protobuf" {
-		return nil
-	}
-
-	// return unmarshalled
-	return s.codec.Unmarshal(m.Body, v.(gproto.Message))
-}