[fix] fix crash when signal server close the connection actively

src/single_window/render.cpp

@@ -437,8 +437,7 @@ int Render::Run() {
   // Main loop
   while (!exit_) {
     if (SignalStatus::SignalConnected == signal_status_ &&
-        !is_create_connection_ && password_inited_ &&
-        "Failed" != connection_status_str_) {
+        !is_create_connection_ && password_inited_) {
       LOG_INFO("Connected with signal server, create p2p connection");
       is_create_connection_ =
           CreateConnection(peer_, client_id_, password_saved_) ? false : true;

src/single_window/render_callback_func.cpp

@@ -174,6 +174,10 @@ void Render::OnSignalStatusCb(SignalStatus status, void *user_data) {
   } else if (SignalStatus::SignalReconnecting == status) {
     render->signal_status_str_ = "SignalReconnecting";
     render->signal_connected_ = false;
+  } else if (SignalStatus::SignalServerClosed == status) {
+    render->signal_status_str_ = "SignalServerClosed";
+    render->signal_connected_ = false;
+    render->is_create_connection_ = false;
   }
 }