Exemplo n.º 1
0
func JoinSession(invitation protocol.SessionInvitation) (net.Conn, error) {
	addr := net.JoinHostPort(net.IP(invitation.Address).String(), strconv.Itoa(int(invitation.Port)))

	conn, err := dialer.Dial("tcp", addr)
	if err != nil {
		return nil, err
	}

	request := protocol.JoinSessionRequest{
		Key: invitation.Key,
	}

	conn.SetDeadline(time.Now().Add(10 * time.Second))
	err = protocol.WriteMessage(conn, request)
	if err != nil {
		return nil, err
	}

	message, err := protocol.ReadMessage(conn)
	if err != nil {
		return nil, err
	}

	conn.SetDeadline(time.Time{})

	switch msg := message.(type) {
	case protocol.Response:
		if msg.Code != 0 {
			return nil, fmt.Errorf("Incorrect response code %d: %s", msg.Code, msg.Message)
		}
		return conn, nil
	default:
		return nil, fmt.Errorf("protocol error: expecting response got %v", msg)
	}
}
Exemplo n.º 2
0
func tcpDialer(uri *url.URL, tlsCfg *tls.Config) (*tls.Conn, error) {
	// Check that there is a port number in uri.Host, otherwise add one.
	host, port, err := net.SplitHostPort(uri.Host)
	if err != nil && strings.HasPrefix(err.Error(), "missing port") {
		// addr is on the form "1.2.3.4"
		uri.Host = net.JoinHostPort(uri.Host, "22000")
	} else if err == nil && port == "" {
		// addr is on the form "1.2.3.4:"
		uri.Host = net.JoinHostPort(host, "22000")
	}

	// Don't try to resolve the address before dialing. The dialer may be a
	// proxy, and we should let the proxy do the resolving in that case.
	conn, err := dialer.Dial("tcp", uri.Host)
	if err != nil {
		l.Debugln(err)
		return nil, err
	}

	tc := tls.Client(conn, tlsCfg)
	err = tc.Handshake()
	if err != nil {
		tc.Close()
		return nil, err
	}

	return tc, nil
}
Exemplo n.º 3
0
func localIP(url *url.URL) (string, error) {
	conn, err := dialer.Dial("tcp", url.Host)
	if err != nil {
		return "", err
	}
	defer conn.Close()

	localIPAddress, _, err := net.SplitHostPort(conn.LocalAddr().String())
	if err != nil {
		return "", err
	}

	return localIPAddress, nil
}