Fixup previous commits and allow IPv6 interface addresses too.

src/base/bittorrent/session.cpp

@@ -1738,9 +1738,21 @@ const QStringList Session::getListeningIPs()
     const QString ifaceAddr = pref->getNetworkInterfaceAddress();
     const bool listenIPv6 = pref->getListenIPv6();
 
-    //No interface name or address defined just use an empty list
+    if (!ifaceAddr.isEmpty()) {
-    if (ifaceName.isEmpty() && ifaceAddr.isEmpty()) {
+        QHostAddress addr(ifaceAddr);
-        IPs.append(QString());
+        if (addr.isNull()) {
+            logger->addMessage(tr("Configured network interface address %1 isn't valid.", "Configured network interface address 124.5.1568.1 isn't valid.").arg(ifaceAddr), Log::CRITICAL);
+            IPs.append("127.0.0.1"); // Force listening to localhost and avoid accidental connection that will expose user data.
+            return IPs;
+        }
+    }
+
+    if (ifaceName.isEmpty()) {
+        if (!ifaceAddr.isEmpty())
+            IPs.append(ifaceAddr);
+        else
+            IPs.append(QString());
+
         return IPs;
     }
 
@@ -1767,13 +1779,16 @@ const QStringList Session::getListeningIPs()
             || (listenIPv6 && (protocol == QAbstractSocket::IPv4Protocol)))
             continue;
 
-        //If an iface address has been defined only allow ip's that match it to go through
+        // If an iface address has been defined only allow ip's that match it to go through
         if (!ifaceAddr.isEmpty()) {
-            if (ipString != ifaceAddr) {
+            if (ifaceAddr == ipString) {
-                continue;
+                IPs.append(ipString);
+                break;
             }
         }
-        IPs.append(ipString);
+        else {
+            IPs.append(ipString);
+        }
     }
 
     // Make sure there is at least one IP

src/base/preferences.cpp

@@ -1339,6 +1339,11 @@ QString Preferences::getNetworkInterfaceName() const
     return value("Preferences/Connection/InterfaceName").toString();
 }
 
+void Preferences::setNetworkInterfaceName(const QString& iface)
+{
+    setValue("Preferences/Connection/InterfaceName", iface);
+}
+
 void Preferences::setNetworkInterfaceAddress(const QString& addr)
 {
     setValue("Preferences/Connection/InterfaceAddress", addr);
@@ -1349,11 +1354,6 @@ QString Preferences::getNetworkInterfaceAddress() const
     return value("Preferences/Connection/InterfaceAddress").toString();
 }
 
-void Preferences::setNetworkInterfaceName(const QString& iface)
-{
-    setValue("Preferences/Connection/InterfaceName", iface);
-}
-
 bool Preferences::getListenIPv6() const
 {
     return value("Preferences/Connection/InterfaceListenIPv6", false).toBool();

src/base/preferences.h

@@ -361,10 +361,10 @@ public:
     void setMaxHalfOpenConnections(int value);
     QString getNetworkInterface() const;
     void setNetworkInterface(const QString& iface);
-    QString getNetworkInterfaceAddress() const;
-    void setNetworkInterfaceAddress(const QString& addr);
     QString getNetworkInterfaceName() const;
     void setNetworkInterfaceName(const QString& iface);
+    QString getNetworkInterfaceAddress() const;
+    void setNetworkInterfaceAddress(const QString& addr);
     bool getListenIPv6() const;
     void setListenIPv6(bool enable);
     QString getNetworkAddress() const;

src/gui/advancedsettings.cpp

@@ -106,7 +106,7 @@ AdvancedSettings::AdvancedSettings(QWidget *parent)
     setEditTriggers(QAbstractItemView::NoEditTriggers);
     // Signals
     connect(&spin_cache, SIGNAL(valueChanged(int)), SLOT(updateCacheSpinSuffix(int)));
-    connect(&combo_iface, SIGNAL(currentIndexChanged(int)), SLOT(updateInterfaceAddressCombo(int)));
+    connect(&combo_iface, SIGNAL(currentIndexChanged(int)), SLOT(updateInterfaceAddressCombo()));
     // Load settings
     loadAdvancedSettings();
     resizeColumnToContents(0);
@@ -156,11 +156,7 @@ void AdvancedSettings::saveAdvancedSettings()
     }
     else {
         QHostAddress ifaceAddr(combo_iface_address.currentText().trimmed());
-        if (ifaceAddr.isNull()) {
+        ifaceAddr.isNull() ? pref->setNetworkInterfaceAddress(QString::null) : pref->setNetworkInterfaceAddress(ifaceAddr.toString());
-            pref->setNetworkInterfaceAddress(QString::null);
-        } else {
-            pref->setNetworkInterfaceAddress(ifaceAddr.toString());
-        }
     }
     // Network Announce address
     QHostAddress networkAddr(txt_network_address.text().trimmed());
@@ -197,41 +193,39 @@ void AdvancedSettings::updateCacheSpinSuffix(int value)
         spin_cache.setSuffix(tr(" MiB"));
 }
 
-void AdvancedSettings::updateInterfaceAddressCombo(int) {
+void AdvancedSettings::updateInterfaceAddressCombo()
-    //Try to get the currently selected interface name
+{
-    QString ifaceName;
+    // Try to get the currently selected interface name
-    if (combo_iface.currentIndex() == 0) {
+    const QString ifaceName = combo_iface.itemData(combo_iface.currentIndex()).toString(); // Empty string for the first element
-        ifaceName = QString();
+    const QString currentAddress = Preferences::instance()->getNetworkInterfaceAddress();
-    }
-    else {
-        ifaceName = combo_iface.itemData(combo_iface.currentIndex()).toString();
-    }
-    const QNetworkInterface iface = QNetworkInterface::interfaceFromName(ifaceName);
 
     //Clear all items and reinsert them, default to all
     combo_iface_address.clear();
-    combo_iface_address.addItem(tr("All Addresses"));
+    combo_iface_address.addItem(tr("All addresses"));
     combo_iface_address.setCurrentIndex(0);
-    if (!iface.isValid()) {
-        return;
-    }
-    //Found a valid interface, try to get the addresses
-    const QList<QNetworkAddressEntry> addresses = iface.addressEntries();
-    const Preferences* const pref = Preferences::instance();
-    const QString currentAddress = pref->getNetworkInterfaceAddress();
 
-    foreach (const QNetworkAddressEntry &entry, addresses) {
+    auto populateCombo = [this, &currentAddress](const QString &ip, const QAbstractSocket::NetworkLayerProtocol &protocol)
-        QHostAddress ip = entry.ip();
+    {
-        QString ipString = ip.toString();
-        QAbstractSocket::NetworkLayerProtocol protocol = ip.protocol();
         Q_ASSERT(protocol == QAbstractSocket::IPv4Protocol || protocol == QAbstractSocket::IPv6Protocol);
         //Only take ipv4 for now?
-        if (protocol != QAbstractSocket::IPv4Protocol)
+        if (protocol != QAbstractSocket::IPv4Protocol && protocol != QAbstractSocket::IPv6Protocol)
-            continue;
+            return;
-        combo_iface_address.addItem( ipString );
+        combo_iface_address.addItem(ip);
         //Try to select the last added one
-        if (ipString == currentAddress) {
+        if (ip == currentAddress)
             combo_iface_address.setCurrentIndex(combo_iface_address.count() - 1);
+    };
+
+    if (ifaceName.isEmpty()) {
+        foreach (const QHostAddress &ip, QNetworkInterface::allAddresses())
+            populateCombo(ip.toString(), ip.protocol());
+    }
+    else {
+        const QNetworkInterface iface = QNetworkInterface::interfaceFromName(ifaceName);
+        const QList<QNetworkAddressEntry> addresses = iface.addressEntries();
+        foreach (const QNetworkAddressEntry &entry, addresses) {
+            const QHostAddress ip = entry.ip();
+            populateCombo(ip.toString(), ip.protocol());
         }
     }
 }
@@ -339,7 +333,7 @@ void AdvancedSettings::loadAdvancedSettings()
     }
     addRow(NETWORK_IFACE, tr("Network Interface (requires restart)"), &combo_iface);
     // Network interface address
-    updateInterfaceAddressCombo(combo_iface.currentIndex());
+    updateInterfaceAddressCombo();
     addRow(NETWORK_IFACE_ADDRESS, tr("Optional IP Address to bind to (requires restart)"), &combo_iface_address);
     // Listen on IPv6 address
     cb_listen_ipv6.setChecked(pref->getListenIPv6());

src/gui/advancedsettings.h

@@ -52,7 +52,8 @@ signals:
 
 private slots:
     void updateCacheSpinSuffix(int value);
-    void updateInterfaceAddressCombo(int index);
+    void updateInterfaceAddressCombo();
+
 private:
     void loadAdvancedSettings();
     template <typename T> void addRow(int row, const QString &rowText, T* widget);