Add port forwarding option for embedded tracker

Closes #17781.
PR #17981.

src/base/bittorrent/sessionimpl.cpp

@@ -80,6 +80,7 @@
 #include "base/logger.h"
 #include "base/net/downloadmanager.h"
 #include "base/net/proxyconfigurationmanager.h"
+#include "base/preferences.h"
 #include "base/profile.h"
 #include "base/torrentfileguard.h"
 #include "base/torrentfilter.h"
@@ -548,8 +549,6 @@ SessionImpl::SessionImpl(QObject *parent)
     if (isExcludedFileNamesEnabled())
         populateExcludedFileNamesRegExpList();
 
-    enableTracker(isTrackerEnabled());
-
     connect(Net::ProxyConfigurationManager::instance()
         , &Net::ProxyConfigurationManager::proxyConfigurationChanged
         , this, &SessionImpl::configureDeferred);
@@ -569,11 +568,14 @@ SessionImpl::SessionImpl(QObject *parent)
 
     m_ioThread->start();
 
+    initMetrics();
+    loadStatistics();
+
     // initialize PortForwarder instance
     new PortForwarderImpl(m_nativeSession);
 
-    initMetrics();
-    loadStatistics();
+    // start embedded tracker
+    enableTracker(isTrackerEnabled());
 
     prepareStartup();
 }
@@ -1980,16 +1982,27 @@ void SessionImpl::configurePeerClasses()
 
 void SessionImpl::enableTracker(const bool enable)
 {
+    const QString profile = u"embeddedTracker"_qs;
+    auto *portForwarder = Net::PortForwarder::instance();
+
     if (enable)
     {
         if (!m_tracker)
             m_tracker = new Tracker(this);
 
         m_tracker->start();
+
+        const auto *pref = Preferences::instance();
+        if (pref->isTrackerPortForwardingEnabled())
+            portForwarder->setPorts(profile, {static_cast<quint16>(pref->getTrackerPort())});
+        else
+            portForwarder->removePorts(profile);
     }
     else
     {
         delete m_tracker;
+
+        portForwarder->removePorts(profile);
     }
 }
 

src/base/bittorrent/tracker.cpp

@@ -203,12 +203,12 @@ Tracker::Tracker(QObject *parent)
 
 bool Tracker::start()
 {
-    const QHostAddress ip = QHostAddress::Any;
     const int port = Preferences::instance()->getTrackerPort();
 
     if (m_server->isListening())
     {
-        if (m_server->serverPort() == port)
+        if (const int oldPort = m_server->serverPort()
+            ; oldPort == port)
         {
             // Already listening on the right port, just return
             return true;
@@ -218,9 +218,9 @@ bool Tracker::start()
         m_server->close();
     }
 
-    // Listen on the predefined port
+    // Listen on port
+    const QHostAddress ip = QHostAddress::Any;
     const bool listenSuccess = m_server->listen(ip, port);
-
     if (listenSuccess)
     {
         LogMsg(tr("Embedded Tracker: Now listening on IP: %1, port: %2")

src/base/preferences.cpp

@@ -1164,6 +1164,16 @@ void Preferences::setTrackerPort(const int port)
     setValue(u"Preferences/Advanced/trackerPort"_qs, port);
 }
 
+bool Preferences::isTrackerPortForwardingEnabled() const
+{
+    return value(u"Preferences/Advanced/trackerPortForwarding"_qs, false);
+}
+
+void Preferences::setTrackerPortForwardingEnabled(const bool enabled)
+{
+    setValue(u"Preferences/Advanced/trackerPortForwarding"_qs, enabled);
+}
+
 #if defined(Q_OS_WIN) || defined(Q_OS_MACOS)
 bool Preferences::isUpdateCheckEnabled() const
 {

src/base/preferences.h

@@ -299,6 +299,8 @@ public:
 #endif
     int getTrackerPort() const;
     void setTrackerPort(int port);
+    bool isTrackerPortForwardingEnabled() const;
+    void setTrackerPortForwardingEnabled(bool enabled);
 #if defined(Q_OS_WIN) || defined(Q_OS_MACOS)
     bool isUpdateCheckEnabled() const;
     void setUpdateCheckEnabled(bool enabled);

src/gui/advancedsettings.cpp

@@ -97,6 +97,7 @@ namespace
         // embedded tracker
         TRACKER_STATUS,
         TRACKER_PORT,
+        TRACKER_PORT_FORWARDING,
         // libtorrent section
         LIBTORRENT_HEADER,
         ASYNC_IO_THREADS,
@@ -292,7 +293,9 @@ void AdvancedSettings::saveAdvancedSettings() const
 
     // Tracker
     pref->setTrackerPort(m_spinBoxTrackerPort.value());
+    pref->setTrackerPortForwardingEnabled(m_checkBoxTrackerPortForwarding.isChecked());
     session->setTrackerEnabled(m_checkBoxTrackerStatus.isChecked());
+
     // Choking algorithm
     session->setChokingAlgorithm(m_comboBoxChokingAlgorithm.currentData().value<BitTorrent::ChokingAlgorithm>());
     // Seed choking algorithm
@@ -732,6 +735,9 @@ void AdvancedSettings::loadAdvancedSettings()
     m_spinBoxTrackerPort.setMaximum(65535);
     m_spinBoxTrackerPort.setValue(pref->getTrackerPort());
     addRow(TRACKER_PORT, tr("Embedded tracker port"), &m_spinBoxTrackerPort);
+    // Tracker port forwarding
+    m_checkBoxTrackerPortForwarding.setChecked(pref->isTrackerPortForwardingEnabled());
+    addRow(TRACKER_PORT_FORWARDING, tr("Enable port forwarding for embedded tracker"), &m_checkBoxTrackerPortForwarding);
     // Choking algorithm
     m_comboBoxChokingAlgorithm.addItem(tr("Fixed slots"), QVariant::fromValue(BitTorrent::ChokingAlgorithm::FixedSlots));
     m_comboBoxChokingAlgorithm.addItem(tr("Upload rate based"), QVariant::fromValue(BitTorrent::ChokingAlgorithm::RateBased));

src/gui/advancedsettings.h

@@ -68,7 +68,7 @@ private:
              m_spinBoxSavePathHistoryLength, m_spinBoxPeerTurnover, m_spinBoxPeerTurnoverCutoff, m_spinBoxPeerTurnoverInterval, m_spinBoxRequestQueueSize;
     QCheckBox m_checkBoxOsCache, m_checkBoxRecheckCompleted, m_checkBoxResolveCountries, m_checkBoxResolveHosts,
               m_checkBoxProgramNotifications, m_checkBoxTorrentAddedNotifications, m_checkBoxReannounceWhenAddressChanged, m_checkBoxTrackerFavicon, m_checkBoxTrackerStatus,
-              m_checkBoxConfirmTorrentRecheck, m_checkBoxConfirmRemoveAllTags, m_checkBoxAnnounceAllTrackers, m_checkBoxAnnounceAllTiers,
+              m_checkBoxTrackerPortForwarding, m_checkBoxConfirmTorrentRecheck, m_checkBoxConfirmRemoveAllTags, m_checkBoxAnnounceAllTrackers, m_checkBoxAnnounceAllTiers,
               m_checkBoxMultiConnectionsPerIp, m_checkBoxValidateHTTPSTrackerCertificate, m_checkBoxSSRFMitigation, m_checkBoxBlockPeersOnPrivilegedPorts, m_checkBoxPieceExtentAffinity,
               m_checkBoxSuggestMode, m_checkBoxSpeedWidgetEnabled, m_checkBoxIDNSupport;
     QComboBox m_comboBoxInterface, m_comboBoxInterfaceAddress, m_comboBoxDiskIOReadMode, m_comboBoxDiskIOWriteMode, m_comboBoxUtpMixedMode, m_comboBoxChokingAlgorithm,

src/webui/api/appcontroller.cpp

@@ -372,6 +372,7 @@ void AppController::preferencesAction()
     // Embedded tracker
     data[u"enable_embedded_tracker"_qs] = session->isTrackerEnabled();
     data[u"embedded_tracker_port"_qs] = pref->getTrackerPort();
+    data[u"embedded_tracker_port_forwarding"_qs] = pref->isTrackerPortForwardingEnabled();
     // Choking algorithm
     data[u"upload_slots_behavior"_qs] = static_cast<int>(session->chokingAlgorithm());
     // Seed choking algorithm
@@ -899,6 +900,8 @@ void AppController::setPreferencesAction()
     // Embedded tracker
     if (hasKey(u"embedded_tracker_port"_qs))
         pref->setTrackerPort(it.value().toInt());
+    if (hasKey(u"embedded_tracker_port_forwarding"_qs))
+        pref->setTrackerPortForwardingEnabled(it.value().toBool());
     if (hasKey(u"enable_embedded_tracker"_qs))
         session->setTrackerEnabled(it.value().toBool());
     // Choking algorithm

src/webui/webapplication.h

@@ -52,7 +52,7 @@
 #include "base/utils/version.h"
 #include "api/isessionmanager.h"
 
-inline const Utils::Version<3, 2> API_VERSION {2, 8, 17};
+inline const Utils::Version<3, 2> API_VERSION {2, 8, 18};
 
 class APIController;
 class AuthController;

src/webui/www/private/views/preferences.html

@@ -1016,6 +1016,14 @@ Use ';' to split multiple entries. Can use wildcard '*'.)QBT_TR[CONTEXT=OptionsD
                     <input type="text" id="embeddedTrackerPort" style="width: 15em;" />
                 </td>
             </tr>
+            <tr>
+                <td>
+                    <label for="embeddedTrackerPortForwarding">QBT_TR(Enable port forwarding for embedded tracker:)QBT_TR[CONTEXT=OptionsDialog]</label>
+                </td>
+                <td>
+                    <input type="checkbox" id="embeddedTrackerPortForwarding" />
+                </td>
+            </tr>
         </table>
     </fieldset>
     <fieldset class="settings">
@@ -2099,6 +2107,7 @@ Use ';' to split multiple entries. Can use wildcard '*'.)QBT_TR[CONTEXT=OptionsD
                         $('blockPeersOnPrivilegedPorts').setProperty('checked', pref.block_peers_on_privileged_ports);
                         $('enableEmbeddedTracker').setProperty('checked', pref.enable_embedded_tracker);
                         $('embeddedTrackerPort').setProperty('value', pref.embedded_tracker_port);
+                        $('embeddedTrackerPortForwarding').setProperty('checked', pref.embedded_tracker_port_forwarding);
                         $('uploadSlotsBehavior').setProperty('value', pref.upload_slots_behavior);
                         $('uploadChokingAlgorithm').setProperty('value', pref.upload_choking_algorithm);
                         $('announceAllTrackers').setProperty('checked', pref.announce_to_all_trackers);
@@ -2526,6 +2535,7 @@ Use ';' to split multiple entries. Can use wildcard '*'.)QBT_TR[CONTEXT=OptionsD
             settings.set('block_peers_on_privileged_ports', $('blockPeersOnPrivilegedPorts').getProperty('checked'));
             settings.set('enable_embedded_tracker', $('enableEmbeddedTracker').getProperty('checked'));
             settings.set('embedded_tracker_port', $('embeddedTrackerPort').getProperty('value'));
+            settings.set('embedded_tracker_port_forwarding', $('embeddedTrackerPortForwarding').getProperty('checked'));
             settings.set('upload_slots_behavior', $('uploadSlotsBehavior').getProperty('value'));
             settings.set('upload_choking_algorithm', $('uploadChokingAlgorithm').getProperty('value'));
             settings.set('announce_to_all_trackers', $('announceAllTrackers').getProperty('checked'));