Exemplo n.º 1
0
func (s *Session) handleBind(stream conn.Conn, bind *proto.Bind) (err error) {
	stream.Debug("Binding new tunnel: %v", bind)

	respond := func(resp *proto.BindResp) {
		if err = proto.WriteMsg(stream, resp); err != nil {
			err = stream.Error("Failed to send bind response: %v", err)
		}
	}

	if err = s.hooks.OnBind(s, bind); err != nil {
		return
	}

	t, err := newTunnel(bind, s, s.binders, s.tunnelHooks)
	if err != nil {
		respond(&proto.BindResp{Error: err.Error()})
		return
	}
	t.Info("Registered new tunnel on session %s", s.id)

	// add it to the list of tunnels
	s.addTunnel(t)

	// acknowledge success
	respond(&proto.BindResp{Url: t.url})
	return
}
Exemplo n.º 2
0
func (t *Tunnel) handlePublic(publicConn conn.Conn) {
	defer publicConn.Close()
	defer t.recoverPanic("Tunnel.handlePublic")

	publicConn.Info("New connection from %v", publicConn.RemoteAddr())

	// connection hook
	if err := t.hooks.OnConnectionOpen(t, publicConn); err != nil {
		t.Error("OnConnectionOpen hook failed: %v", err)
		return
	}

	startTime := time.Now()

	// open a proxy stream
	proxyConn, err := t.sess.openProxy(publicConn.RemoteAddr().String(), t.url)
	if err != nil {
		t.Error("Failed to open proxy connection: %v", err)
		return
	}
	defer proxyConn.Close()

	// join the public and proxy connections
	bytesIn, bytesOut := conn.Join(publicConn, proxyConn)

	if err = t.hooks.OnConnectionClose(t, publicConn, time.Now().Sub(startTime), bytesIn, bytesOut); err != nil {
		t.Error("OnConnectionClose hook failed: %v", err)
		return
	}
}
Exemplo n.º 3
0
func (s *Session) handleStream(stream conn.Conn) {
	defer s.recoverPanic("Session.handleStream")
	defer stream.Close()

	// make sure we only process streams while we're not shutting down
	if err := s.guard.Enter(); err != nil {
		stream.Error("Failing stream, session is shutting down")
		return
	}
	defer s.guard.Exit()

	raw, err := proto.ReadMsg(stream)
	if err != nil {
		stream.Error("Failed to read message: %v")
		go s.Shutdown()
		return
	}

	switch msg := raw.(type) {
	case *proto.Bind:
		err = s.handleBind(stream, msg)
	case *proto.Unbind:
		err = s.handleUnbind(stream, msg)
	default:
		err = fmt.Errorf("Unknown message type: %v", reflect.TypeOf(raw))
	}

	if err != nil {
		stream.Error("Error on stream: %v", err)
		go s.Shutdown()
		return
	}

	return
}
Exemplo n.º 4
0
func WriteMsg(c conn.Conn, msg interface{}) (err error) {
	buffer, err := Pack(msg)
	if err != nil {
		return
	}

	c.Debug("Writing message: %s", string(buffer))
	if err = binary.Write(c, binary.LittleEndian, int64(len(buffer))); err != nil {
		return
	}

	if _, err = c.Write(buffer); err != nil {
		return
	}

	return
}
Exemplo n.º 5
0
func readMsgShared(c conn.Conn) (buffer []byte, err error) {
	c.Debug("Waiting to read message")
	var sz int64
	err = binary.Read(c, binary.LittleEndian, &sz)
	if err != nil {
		return
	}

	c.Debug("Reading message with length: %d", sz)
	buffer = make([]byte, sz)
	if _, err = io.ReadFull(c, buffer); err != nil {
		return
	}

	c.Debug("Read message %s", buffer)
	return
}