- qBittorrent no longer listens on a random port whenever it receives a listen_failed_alert (because it may correspond to another network interface)

- Display a "disconnected" icon in status bar whenever qBittorrent fails to listen on the selected port

src/bittorrent.cpp

@@ -1705,18 +1705,6 @@ void Bittorrent::readAlerts() {
       }
     }
 #endif
-    else if (listen_failed_alert* p = dynamic_cast<listen_failed_alert*>(a.get())) {
-      // Level: fatal
-      int tried_port = p->endpoint.port();
-      srand(time(0));
-      int fallback_port = tried_port;
-      do {
-        fallback_port = rand() % 64512 + 1024;
-      } while(fallback_port == tried_port);
-      addConsoleMessage(tr("Couldn't listen on port %1, using %2 instead.").arg(QString::number(tried_port)).arg(QString::number(fallback_port)), QString::fromUtf8("red"));
-      setListeningPort(fallback_port);
-      //emit portListeningFailure();
-    }
     /*else if (torrent_paused_alert* p = dynamic_cast<torrent_paused_alert*>(a.get())) {
       QTorrentHandle h(p->handle);
       qDebug("Received a torrent_paused_alert for %s", h.hash().toLocal8Bit().data());

src/icons.qrc

@@ -60,6 +60,7 @@
   <file>Icons/skin/exit.png</file>
   <file>Icons/skin/delete_all.png</file>
   <file>Icons/skin/splash.png</file>
+  <file>Icons/skin/disconnected.png</file>
   <file>Icons/skin/decrease.png</file>
   <file>Icons/skin/uploading.png</file>
   <file>Icons/skin/filterall.png</file>

src/statusbar.h

@@ -142,6 +142,10 @@ public slots:
   void refreshStatusBar() {
     // Update connection status
     session_status sessionStatus = BTSession->getSessionStatus();
+    if(!BTSession->getSession()->is_listening()) {
+      connecStatusLblIcon->setPixmap(QPixmap(QString::fromUtf8(":/Icons/skin/disconnected.png")));
+      connecStatusLblIcon->setToolTip(QString::fromUtf8("<b>")+tr("Connection Status:")+QString::fromUtf8("</b><br>")+tr("Offline. This usually means that qBittorrent failed to listen on the selected port for incoming connections."));
+    } else {
       if(sessionStatus.has_incoming_connections) {
         // Connection OK
         connecStatusLblIcon->setPixmap(QPixmap(QString::fromUtf8(":/Icons/skin/connected.png")));
@@ -150,6 +154,7 @@ public slots:
         connecStatusLblIcon->setPixmap(QPixmap(QString::fromUtf8(":/Icons/skin/firewalled.png")));
         connecStatusLblIcon->setToolTip(QString::fromUtf8("<b>")+tr("Connection status:")+QString::fromUtf8("</b><br>")+QString::fromUtf8("<i>")+tr("No direct connections. This may indicate network configuration problems.")+QString::fromUtf8("</i>"));
       }
+    }
     // Update Number of DHT nodes
     if(BTSession->isDHTEnabled()) {
       DHTLbl->setVisible(true);