Beispiel #1
0
func (ids *IDService) IdentifyConn(c inet.Conn) {
	ids.currmu.Lock()
	if wait, found := ids.currid[c]; found {
		ids.currmu.Unlock()
		log.Debugf("IdentifyConn called twice on: %s", c)
		<-wait // already identifying it. wait for it.
		return
	}
	ch := make(chan struct{})
	ids.currid[c] = ch
	ids.currmu.Unlock()

	defer close(ch)

	s, err := c.NewStream()
	if err != nil {
		log.Debugf("error opening initial stream for %s: %s", ID, err)
		log.Event(context.TODO(), "IdentifyOpenFailed", c.RemotePeer())
		c.Close()
		return
	}

	bwc := ids.Host.GetBandwidthReporter()
	s = mstream.WrapStream(s, ID, bwc)

	// ok give the response to our handler.
	if err := msmux.SelectProtoOrFail(ID, s); err != nil {
		log.Debugf("error writing stream header for %s", ID)
		log.Event(context.TODO(), "IdentifyOpenFailed", c.RemotePeer())
		s.Close()
		return
	}

	ids.ResponseHandler(s)

	ids.currmu.Lock()
	_, found := ids.currid[c]
	delete(ids.currid, c)
	ids.currmu.Unlock()

	if !found {
		log.Debugf("IdentifyConn failed to find channel (programmer error) for %s", c)
		return
	}
}
Beispiel #2
0
func (ids *IDService) consumeMessage(mes *pb.Identify, c inet.Conn) {
	p := c.RemotePeer()

	// mes.Protocols

	// mes.ObservedAddr
	ids.consumeObservedAddress(mes.GetObservedAddr(), c)

	// mes.ListenAddrs
	laddrs := mes.GetListenAddrs()
	lmaddrs := make([]ma.Multiaddr, 0, len(laddrs))
	for _, addr := range laddrs {
		maddr, err := ma.NewMultiaddrBytes(addr)
		if err != nil {
			log.Debugf("%s failed to parse multiaddr from %s %s", ID,
				p, c.RemoteMultiaddr())
			continue
		}
		lmaddrs = append(lmaddrs, maddr)
	}

	lmaddrs = append(lmaddrs, c.RemoteMultiaddr())

	// update our peerstore with the addresses. here, we SET the addresses, clearing old ones.
	// We are receiving from the peer itself. this is current address ground truth.
	ids.Host.Peerstore().SetAddrs(p, lmaddrs, peer.ConnectedAddrTTL)
	log.Debugf("%s received listen addrs for %s: %s", c.LocalPeer(), c.RemotePeer(), lmaddrs)

	// get protocol versions
	pv := mes.GetProtocolVersion()
	av := mes.GetAgentVersion()

	// version check. if we shouldn't talk, bail.
	// TODO: at this point, we've already exchanged information.
	// move this into a first handshake before the connection can open streams.
	if !protocolVersionsAreCompatible(pv, LibP2PVersion) {
		logProtocolMismatchDisconnect(c, pv, av)
		c.Close()
		return
	}

	ids.Host.Peerstore().Put(p, "ProtocolVersion", pv)
	ids.Host.Peerstore().Put(p, "AgentVersion", av)
}