Example #1
0
// Handle getting ID from this peer, handshake, and adding it into the map
func (s *Swarm) handleIncomingConn(nconn conn.Conn) {
	// this handler is a child. added by caller.
	defer s.Children().Done()

	// Setup the new connection
	_, err := s.connSetup(nconn)
	if err != nil && err != ErrAlreadyOpen {
		s.errChan <- err
		nconn.Close()
	}
}
Example #2
0
// Handles the receiving + wrapping of messages, per conn.
// Consider using reflect.Select with one goroutine instead of n.
func (s *Swarm) fanInSingle(c conn.Conn) {
	// cleanup all data associated with this child Connection.
	defer func() {
		// remove it from the map.
		s.connsLock.Lock()
		delete(s.conns, c.RemotePeer().Key())
		s.connsLock.Unlock()

		s.Children().Done()
		c.Children().Done() // child of Conn as well.
	}()

	i := 0
	for {
		select {
		case <-s.Closing(): // Swarm closing
			return

		case <-c.Closing(): // Conn closing
			return

		case data, ok := <-c.In():
			if !ok {
				log.Infof("%s in channel closed", c)
				return // channel closed.
			}
			i++
			log.Debugf("%s received message from %s (%d)", s.local, c.RemotePeer(), i)
			s.Incoming <- msg.New(c.RemotePeer(), data)
		}
	}
}
Example #3
0
// connSetup takes a new connection, performs the IPFS handshake (handshake3)
// and then adds it to the appropriate MultiConn.
func (s *Swarm) connSetup(c conn.Conn) (conn.Conn, error) {
	if c == nil {
		return nil, errors.New("Tried to start nil connection.")
	}

	log.Event(context.TODO(), "connSetupBegin", c.LocalPeer(), c.RemotePeer())

	// add address of connection to Peer. Maybe it should happen in connSecure.
	// NOT adding this address here, because the incoming address in TCP
	// is an EPHEMERAL address, and not the address we want to keep around.
	// addresses should be figured out through the DHT.
	// c.Remote.AddAddress(c.Conn.RemoteMultiaddr())

	// handshake3
	ctxT, _ := context.WithTimeout(c.Context(), conn.HandshakeTimeout)
	h3result, err := conn.Handshake3(ctxT, c)
	if err != nil {
		c.Close()
		return nil, fmt.Errorf("Handshake3 failed: %s", err)
	}

	// check for nats. you know, just in case.
	if h3result.LocalObservedAddress != nil {
		s.checkNATWarning(h3result.LocalObservedAddress)
	} else {
		log.Warningf("Received nil observed address from %s", c.RemotePeer())
	}

	// add to conns
	mc, err := s.peerMultiConn(c.RemotePeer())
	if err != nil {
		c.Close()
		return nil, err
	}
	mc.Add(c)
	log.Event(context.TODO(), "connSetupSuccess", c.LocalPeer(), c.RemotePeer())
	return c, nil
}