whisper: Open stream to the client + send registration msg

cmd/wnode/main.go

@@ -208,7 +208,7 @@ func initialize() {
 		if *useLibP2P {
 			var libp2pbootstrap *string
 			for libp2pbootstrap == nil {
-				libp2pbootstrap = scanLineA("Please enter the bootstrap node's addres: ")
+				libp2pbootstrap = scanLineA("Please enter the bootstrap node's address: ")
 			}
 			libp2pbootaddr, err := multiaddr.NewMultiaddr(*libp2pbootstrap)
 			if err != nil {
@@ -293,7 +293,10 @@ func initialize() {
 	}
 
 	if *useLibP2P {
-		server, err = whisper.NewLibP2PWhisperServer()
+		var port uint
+		var a string
+		fmt.Scanf(*argIP, "%s:%d", &a, &port)
+		server, err = whisper.NewLibP2PWhisperServer(port, shh)
 		if err != nil {
 			utils.Fatalf("Error starting the libp2p client: %v", err)
 		}

whisper/whisperv6/doc.go

@@ -48,6 +48,7 @@ const (
 	messagesCode         = 1   // normal whisper message
 	powRequirementCode   = 2   // PoW requirement
 	bloomFilterExCode    = 3   // bloom filter exchange
+	lp2pPeerCode         = 125 // libp2p-based peer exchange protocol
 	p2pRequestCode       = 126 // peer-to-peer message, used by Dapp protocol
 	p2pMessageCode       = 127 // peer-to-peer message (to be consumed by the peer, but not forwarded any further)
 	NumberOfMessageCodes = 128

whisper/whisperv6/libp2p_glue.go

@@ -31,6 +31,7 @@ import (
 	peer "github.com/libp2p/go-libp2p-peer"
 	ma "github.com/multiformats/go-multiaddr"
 	set "gopkg.in/fatih/set.v0"
+	pstore "github.com/libp2p/go-libp2p-peerstore"
 )
 
 // LibP2PStream is a wrapper used to implement the MsgReadWriter
@@ -120,6 +121,8 @@ type LibP2PPeer struct {
 	*PeerBase
 
 	id peer.ID
+
+	connectionStream *LibP2PStream
 }
 
 func newLibP2PPeer(w *Whisper, pid peer.ID, rw p2p.MsgReadWriter) Peer {
@@ -135,6 +138,7 @@ func newLibP2PPeer(w *Whisper, pid peer.ID, rw p2p.MsgReadWriter) Peer {
 			fullNode:       true,
 		},
 		pid,
+		nil,
 	}
 }
 
@@ -156,6 +160,8 @@ type LibP2PWhisperServer struct {
 	Host host.Host
 
 	Peers []*LibP2PPeer
+
+	whisper *Whisper
 }
 
 // Start starts the server
@@ -172,23 +178,66 @@ func (server *LibP2PWhisperServer) Start() error {
 			}
 		}
 
-		whisper := server.Peers[0].host
 		lps := &LibP2PStream{stream}
 
 		// Unknown peer
 		if peer == nil {
-			peer = newLibP2PPeer(whisper, pid, lps)
+			peer = newLibP2PPeer(server.whisper, pid, lps)
 			// TODO check critical section
 			server.Peers = append(server.Peers, peer.(*LibP2PPeer))
 		}
 
-		whisper.runMessageLoop(peer, lps)
+		server.whisper.runMessageLoop(peer, lps)
 	})
+
+	fmt.Println("Currently having the following peers:", server.Peers)
+
+	// Open a stream to every peer currently known
+	for _, p := range server.Peers {
+		fmt.Println("opening stream to peer: ", p)
+		// Do not dial to self - actually, this should raise
+		// an exception rather than be ignored
+		// if pid == server.Host.ID() {
+		// 	continue
+		// }
+
+		// Create a stream with the peer
+		s, err := server.Host.NewStream(context.Background(), p.id, WhisperProtocolString)
+		if err != nil {
+			panic(err)
+		}
+
+		// Save the stream
+		lps := LibP2PStream{
+			stream: s,
+		}
+		p.connectionStream = &lps
+
+		// Send a first message to notify the remote peer we want
+		// to connect
+		connectMsg := p2p.Msg{
+			Code: lp2pPeerCode,
+			Size: 0,
+			Payload: bytes.NewReader([]byte{}),
+		}
+
+		err = lps.WriteMsg(connectMsg)
+		if err != nil {
+			// XXX
+			panic(err)
+		}
+	}
+
 	return nil
 }
 
 // Stop stops the server
 func (server *LibP2PWhisperServer) Stop() {
+	for _, p := range server.Peers {
+		// TODO send disconnect message
+		p.connectionStream.stream.Close()
+	}
+
 	server.Host.Close()
 }
 
@@ -205,6 +254,7 @@ func (server *LibP2PWhisperServer) Enode() string {
 	return fullAddr.String()
 }
 
+// AddPeer is a helper function to add peers to the server
 func (server *LibP2PWhisperServer) AddPeer(addr ma.Multiaddr) *LibP2PPeer {
 	fmt.Println("Adding peer: ", addr)
 	pid, err := addr.ValueForProtocol(ma.P_IPFS)
@@ -212,15 +262,25 @@ func (server *LibP2PWhisperServer) AddPeer(addr ma.Multiaddr) *LibP2PPeer {
 		// XXX
 		panic(err)
 	}
-	return &LibP2PPeer{id: peer.ID(pid)}
+	peerid, err := peer.IDB58Decode(pid)
+	if err != nil {
+		panic(err)
+	}
+	ipfsaddrpart, _ := ma.NewMultiaddr(fmt.Sprintf("/ipfs/%s", pid))
+	ipaddr := addr.Decapsulate(ipfsaddrpart)
+	server.Host.Peerstore().AddAddr(peerid, ipaddr, pstore.PermanentAddrTTL)
+	newPeer := &LibP2PPeer{id: peer.ID(pid)}
+	server.Peers = append(server.Peers, newPeer)
+
+	return newPeer
 }
 
 // NewLibP2PWhisperServer creates a new WhisperServer with
 // a libp2p backend.
-func NewLibP2PWhisperServer() (WhisperServer, error) {
+func NewLibP2PWhisperServer(port uint, whisper *Whisper) (WhisperServer, error) {
 	priv, _, err := crypto.GenerateKeyPair(crypto.Ed25519, 384)
 	opts := []libp2p.Option{
-		libp2p.ListenAddrStrings(fmt.Sprintf("/ip4/0.0.0.0/tcp/%d", WhisperPort)),
+		libp2p.ListenAddrStrings(fmt.Sprintf("/ip4/0.0.0.0/tcp/%d", port)),
 		libp2p.Identity(priv),
 	}
 
@@ -229,6 +289,6 @@ func NewLibP2PWhisperServer() (WhisperServer, error) {
 		return nil, fmt.Errorf("Error setting up the libp2p network: %s", err)
 	}
 
-	server := &LibP2PWhisperServer{h, []*LibP2PPeer{}}
+	server := &LibP2PWhisperServer{h, []*LibP2PPeer{}, whisper}
 	return server, nil
 }

whisper/whisperv6/whisper.go

@@ -718,6 +718,7 @@ func (whisper *Whisper) runMessageLoop(p Peer, rw p2p.MsgReadWriter) error {
 				return errors.New("invalid bloom filter exchange message")
 			}
 			p.setBloomFilter(bloom)
+		case lp2pPeerCode:
 		case p2pMessageCode:
 			// peer-to-peer message, sent directly to peer bypassing PoW checks, etc.
 			// this message is not supposed to be forwarded to other peers, and