static void
tp_stream_tube_channel_get_property (GObject *object,
    guint property_id,
    GValue *value,
    GParamSpec *pspec)
{
  TpStreamTubeChannel *self = (TpStreamTubeChannel *) object;

  switch (property_id)
    {
      case PROP_SERVICE:
        g_value_set_string (value, tp_stream_tube_channel_get_service (self));
        break;

      case PROP_PARAMETERS:
        g_value_set_boxed (value, self->priv->parameters);
        break;

      case PROP_PARAMETERS_VARDICT:
        g_value_take_variant (value,
            tp_stream_tube_channel_dup_parameters_vardict (self));
        break;

      default:
        G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
        break;
    }
}
static void
handle_channels_cb (TpSimpleHandler *handler,
    TpAccount *account,
    TpConnection *connection,
    GList *channels,
    GList *requests_satisfied,
    gint64 user_action_time,
    TpHandleChannelsContext *context,
    gpointer user_data)
{
  VinoTubeServersManager *self = user_data;
  VinoTubeServer *server;
  GdkDisplay *display;
  GdkScreen *screen;
  /* the server is listenning only on lo as only the tube is supposed to
  connect to it */
  gchar * network_interface = "lo";
  GList *l;
  TpStreamTubeChannel *channel = NULL;

  for (l = channels; l != NULL; l = g_list_next (l))
    {
      TpStreamTubeChannel *chan = l->data;

      if (!TP_IS_STREAM_TUBE_CHANNEL (chan))
        continue;

      if (tp_proxy_get_invalidated (chan) != NULL)
        continue;

      if (tp_strdiff (tp_stream_tube_channel_get_service (chan), "rfb"))
        continue;

      channel = chan;
      break;
    }

  if (channel == NULL)
    {
      /* No stream tube channel ?! */
      GError error = { TP_ERRORS, TP_ERROR_INVALID_ARGUMENT,
          "No stream tube channel" };

      tp_handle_channels_context_fail (context, &error);
      return;
    }

  display = gdk_display_get_default ();
  screen = gdk_display_get_default_screen (display);

  server = g_object_new (VINO_TYPE_TUBE_SERVER,
      "display-status-icon",  0,
      "prompt-enabled",       0,
      "view-only",            0,
      "network-interface",    network_interface,
      "use-alternative-port", 1,
      "alternative-port",     self->priv->alternative_port,
      "auth-methods",         1,
      "require-encryption",   0,
      "vnc-password",         NULL,
      "on-hold",              0,
      "screen",               screen,
      "lock-screen",          0,
      "disable-background",   0,
      "use-upnp",             0,
      "tube",                 channel,
      NULL);

  self->priv->vino_tube_servers = g_slist_prepend
      (self->priv->vino_tube_servers, server);

  g_signal_connect (G_OBJECT (server), "disconnected", G_CALLBACK
      (vino_tube_servers_manager_disconnected_cb), self);

  self->priv->alternative_port++;

  vino_tube_server_share_with_tube (server, NULL);

  tp_handle_channels_context_accept (context);
}