[Qt] allow users to set -onion via GUI

- also allow users to see, if the default proxy (-proxy) is used for
  reaching peers via IPv6 or Tor

src/qt/forms/optionsdialog.ui

@@ -7,7 +7,7 @@
     <x>0</x>
     <y>0</y>
     <width>560</width>
-    <height>400</height>
+    <height>440</height>
    </rect>
   </property>
   <property name="windowTitle">
@@ -297,6 +297,193 @@
          </item>
         </layout>
        </item>
+       <item>
+        <layout class="QHBoxLayout" name="horizontalLayout_2_Network">
+         <item>
+          <widget class="QLabel" name="proxyActiveNets">
+           <property name="text">
+            <string>Used for reaching peers via:</string>
+           </property>
+           <property name="textFormat">
+            <enum>Qt::PlainText</enum>
+           </property>
+          </widget>
+         </item>
+         <item>
+          <widget class="QCheckBox" name="proxyReachIPv4">
+           <property name="enabled">
+            <bool>false</bool>
+           </property>
+           <property name="toolTip">
+            <string>Shows, if the supplied default SOCKS5 proxy is used to reach peers via this network type.</string>
+           </property>
+           <property name="text">
+            <string/>
+           </property>
+          </widget>
+         </item>
+         <item>
+          <widget class="QLabel" name="proxyReachIPv4Label">
+           <property name="text">
+            <string>IPv4</string>
+           </property>
+           <property name="textFormat">
+            <enum>Qt::PlainText</enum>
+           </property>
+          </widget>
+         </item>
+         <item>
+          <widget class="QCheckBox" name="proxyReachIPv6">
+           <property name="enabled">
+            <bool>false</bool>
+           </property>
+           <property name="toolTip">
+            <string>Shows, if the supplied default SOCKS5 proxy is used to reach peers via this network type.</string>
+           </property>
+           <property name="text">
+            <string/>
+           </property>
+          </widget>
+         </item>
+         <item>
+          <widget class="QLabel" name="proxyReachIPv6Label">
+           <property name="text">
+            <string>IPv6</string>
+           </property>
+           <property name="textFormat">
+            <enum>Qt::PlainText</enum>
+           </property>
+          </widget>
+         </item>
+         <item>
+          <widget class="QCheckBox" name="proxyReachTor">
+           <property name="enabled">
+            <bool>false</bool>
+           </property>
+           <property name="toolTip">
+            <string>Shows, if the supplied default SOCKS5 proxy is used to reach peers via this network type.</string>
+           </property>
+           <property name="text">
+            <string/>
+           </property>
+          </widget>
+         </item>
+         <item>
+          <widget class="QLabel" name="proxyReachTorLabel">
+           <property name="text">
+            <string>Tor</string>
+           </property>
+           <property name="textFormat">
+            <enum>Qt::PlainText</enum>
+           </property>
+          </widget>
+         </item>
+         <item>
+          <spacer name="horizontalSpacer_2_Network">
+           <property name="orientation">
+            <enum>Qt::Horizontal</enum>
+           </property>
+           <property name="sizeHint" stdset="0">
+            <size>
+             <width>40</width>
+             <height>20</height>
+            </size>
+           </property>
+          </spacer>
+         </item>
+        </layout>
+       </item>
+       <item>
+        <widget class="QCheckBox" name="connectSocksTor">
+         <property name="toolTip">
+          <string>Connect to the Bitcoin network through a separate SOCKS5 proxy for Tor hidden services.</string>
+         </property>
+         <property name="text">
+          <string>Use separate SOCKS5 proxy to reach peers via Tor hidden services:</string>
+         </property>
+        </widget>
+       </item>
+       <item>
+        <layout class="QHBoxLayout" name="horizontalLayout_3_Network">
+         <item>
+          <widget class="QLabel" name="proxyIpTorLabel">
+           <property name="text">
+            <string>Proxy &amp;IP:</string>
+           </property>
+           <property name="textFormat">
+            <enum>Qt::PlainText</enum>
+           </property>
+           <property name="buddy">
+            <cstring>proxyIpTor</cstring>
+           </property>
+          </widget>
+         </item>
+         <item>
+          <widget class="QValidatedLineEdit" name="proxyIpTor">
+           <property name="minimumSize">
+            <size>
+             <width>140</width>
+             <height>0</height>
+            </size>
+           </property>
+           <property name="maximumSize">
+            <size>
+             <width>140</width>
+             <height>16777215</height>
+            </size>
+           </property>
+           <property name="toolTip">
+            <string>IP address of the proxy (e.g. IPv4: 127.0.0.1 / IPv6: ::1)</string>
+           </property>
+          </widget>
+         </item>
+         <item>
+          <widget class="QLabel" name="proxyPortTorLabel">
+           <property name="text">
+            <string>&amp;Port:</string>
+           </property>
+           <property name="textFormat">
+            <enum>Qt::PlainText</enum>
+           </property>
+           <property name="buddy">
+            <cstring>proxyPortTor</cstring>
+           </property>
+          </widget>
+         </item>
+         <item>
+          <widget class="QLineEdit" name="proxyPortTor">
+           <property name="minimumSize">
+            <size>
+             <width>55</width>
+             <height>0</height>
+            </size>
+           </property>
+           <property name="maximumSize">
+            <size>
+             <width>55</width>
+             <height>16777215</height>
+            </size>
+           </property>
+           <property name="toolTip">
+            <string>Port of the proxy (e.g. 9050)</string>
+           </property>
+          </widget>
+         </item>
+         <item>
+          <spacer name="horizontalSpacer_4_Network">
+           <property name="orientation">
+            <enum>Qt::Horizontal</enum>
+           </property>
+           <property name="sizeHint" stdset="0">
+            <size>
+             <width>40</width>
+             <height>20</height>
+            </size>
+           </property>
+          </spacer>
+         </item>
+        </layout>
+       </item>
        <item>
         <spacer name="verticalSpacer_Network">
          <property name="orientation">

src/qt/optionsdialog.cpp

@@ -35,7 +35,7 @@ OptionsDialog::OptionsDialog(QWidget *parent, bool enableWallet) :
     ui(new Ui::OptionsDialog),
     model(0),
     mapper(0),
-    fProxyIpValid(true)
+    fProxyIpsValid(true)
 {
     ui->setupUi(this);
 
@@ -54,10 +54,18 @@ OptionsDialog::OptionsDialog(QWidget *parent, bool enableWallet) :
     ui->proxyPort->setEnabled(false);
     ui->proxyPort->setValidator(new QIntValidator(1, 65535, this));
 
+    ui->proxyIpTor->setEnabled(false);
+    ui->proxyPortTor->setEnabled(false);
+    ui->proxyPortTor->setValidator(new QIntValidator(1, 65535, this));
+
     connect(ui->connectSocks, SIGNAL(toggled(bool)), ui->proxyIp, SLOT(setEnabled(bool)));
     connect(ui->connectSocks, SIGNAL(toggled(bool)), ui->proxyPort, SLOT(setEnabled(bool)));
 
+    connect(ui->connectSocksTor, SIGNAL(toggled(bool)), ui->proxyIpTor, SLOT(setEnabled(bool)));
+    connect(ui->connectSocksTor, SIGNAL(toggled(bool)), ui->proxyPortTor, SLOT(setEnabled(bool)));
+
     ui->proxyIp->installEventFilter(this);
+    ui->proxyIpTor->installEventFilter(this);
 
     /* Window elements init */
 #ifdef Q_OS_MAC
@@ -110,7 +118,7 @@ OptionsDialog::OptionsDialog(QWidget *parent, bool enableWallet) :
     mapper->setSubmitPolicy(QDataWidgetMapper::ManualSubmit);
     mapper->setOrientation(Qt::Vertical);
 
-    /* setup/change UI elements when proxy IP is invalid/valid */
+    /* setup/change UI elements when proxy IPs are invalid/valid */
     connect(this, SIGNAL(proxyIpChecks(QValidatedLineEdit *, int)), this, SLOT(doProxyIpChecks(QValidatedLineEdit *, int)));
 }
 
@@ -137,6 +145,8 @@ void OptionsDialog::setModel(OptionsModel *model)
         mapper->setModel(model);
         setMapper();
         mapper->toFirst();
+
+        updateDefaultProxyNets();
     }
 
     /* warn when one of the following settings changes by user action (placed here so init via mapper doesn't trigger them) */
@@ -149,6 +159,7 @@ void OptionsDialog::setModel(OptionsModel *model)
     /* Network */
     connect(ui->allowIncoming, SIGNAL(clicked(bool)), this, SLOT(showRestartWarning()));
     connect(ui->connectSocks, SIGNAL(clicked(bool)), this, SLOT(showRestartWarning()));
+    connect(ui->connectSocksTor, SIGNAL(clicked(bool)), this, SLOT(showRestartWarning()));
     /* Display */
     connect(ui->lang, SIGNAL(valueChanged()), this, SLOT(showRestartWarning()));
     connect(ui->thirdPartyTxUrls, SIGNAL(textChanged(const QString &)), this, SLOT(showRestartWarning()));
@@ -173,6 +184,10 @@ void OptionsDialog::setMapper()
     mapper->addMapping(ui->proxyIp, OptionsModel::ProxyIP);
     mapper->addMapping(ui->proxyPort, OptionsModel::ProxyPort);
 
+    mapper->addMapping(ui->connectSocksTor, OptionsModel::ProxyUseTor);
+    mapper->addMapping(ui->proxyIpTor, OptionsModel::ProxyIPTor);
+    mapper->addMapping(ui->proxyPortTor, OptionsModel::ProxyPortTor);
+
     /* Window */
 #ifndef Q_OS_MAC
     mapper->addMapping(ui->minimizeToTray, OptionsModel::MinimizeToTray);
@@ -188,7 +203,7 @@ void OptionsDialog::setMapper()
 void OptionsDialog::enableOkButton()
 {
     /* prevent enabling of the OK button when data modified, if there is an invalid proxy address present */
-    if(fProxyIpValid)
+    if(fProxyIpsValid)
         setOkButtonState(true);
 }
 
@@ -224,6 +239,7 @@ void OptionsDialog::on_okButton_clicked()
 {
     mapper->submit();
     accept();
+    updateDefaultProxyNets();
 }
 
 void OptionsDialog::on_cancelButton_clicked()
@@ -257,11 +273,10 @@ void OptionsDialog::doProxyIpChecks(QValidatedLineEdit *pUiProxyIp, int nProxyPo
 {
     Q_UNUSED(nProxyPort);
 
-    const std::string strAddrProxy = pUiProxyIp->text().toStdString();
     CService addrProxy;
 
     /* Check for a valid IPv4 / IPv6 address */
-    if (!(fProxyIpValid = LookupNumeric(strAddrProxy.c_str(), addrProxy)))
+    if (!(fProxyIpsValid = LookupNumeric(pUiProxyIp->text().toStdString().c_str(), addrProxy)))
     {
         disableOkButton();
         pUiProxyIp->setValid(false);
@@ -275,6 +290,28 @@ void OptionsDialog::doProxyIpChecks(QValidatedLineEdit *pUiProxyIp, int nProxyPo
     }
 }
 
+void OptionsDialog::updateDefaultProxyNets()
+{
+    proxyType proxy;
+    std::string strProxy;
+    QString strDefaultProxyGUI;
+
+    GetProxy(NET_IPV4, proxy);
+    strProxy = proxy.proxy.ToStringIP() + ":" + proxy.proxy.ToStringPort();
+    strDefaultProxyGUI = ui->proxyIp->text() + ":" + ui->proxyPort->text();
+    (strProxy == strDefaultProxyGUI.toStdString()) ? ui->proxyReachIPv4->setChecked(true) : ui->proxyReachIPv4->setChecked(false);
+
+    GetProxy(NET_IPV6, proxy);
+    strProxy = proxy.proxy.ToStringIP() + ":" + proxy.proxy.ToStringPort();
+    strDefaultProxyGUI = ui->proxyIp->text() + ":" + ui->proxyPort->text();
+    (strProxy == strDefaultProxyGUI.toStdString()) ? ui->proxyReachIPv6->setChecked(true) : ui->proxyReachIPv6->setChecked(false);
+
+    GetProxy(NET_TOR, proxy);
+    strProxy = proxy.proxy.ToStringIP() + ":" + proxy.proxy.ToStringPort();
+    strDefaultProxyGUI = ui->proxyIp->text() + ":" + ui->proxyPort->text();
+    (strProxy == strDefaultProxyGUI.toStdString()) ? ui->proxyReachTor->setChecked(true) : ui->proxyReachTor->setChecked(false);
+}
+
 bool OptionsDialog::eventFilter(QObject *object, QEvent *event)
 {
     if(event->type() == QEvent::FocusOut)
@@ -283,6 +320,10 @@ bool OptionsDialog::eventFilter(QObject *object, QEvent *event)
         {
             Q_EMIT proxyIpChecks(ui->proxyIp, ui->proxyPort->text().toInt());
         }
+        else if(object == ui->proxyIpTor)
+        {
+            Q_EMIT proxyIpChecks(ui->proxyIpTor, ui->proxyPortTor->text().toInt());
+        }
     }
     return QDialog::eventFilter(object, event);
 }

src/qt/optionsdialog.h

@@ -47,6 +47,8 @@ private Q_SLOTS:
     void showRestartWarning(bool fPersistent = false);
     void clearStatusLabel();
     void doProxyIpChecks(QValidatedLineEdit *pUiProxyIp, int nProxyPort);
+    /* query the networks, for which the default proxy is used */
+    void updateDefaultProxyNets();
 
 Q_SIGNALS:
     void proxyIpChecks(QValidatedLineEdit *pUiProxyIp, int nProxyPort);
@@ -55,7 +57,7 @@ private:
     Ui::OptionsDialog *ui;
     OptionsModel *model;
     QDataWidgetMapper *mapper;
-    bool fProxyIpValid;
+    bool fProxyIpsValid;
 };
 
 #endif // BITCOIN_QT_OPTIONSDIALOG_H

src/qt/optionsmodel.cpp

@@ -117,6 +117,16 @@ void OptionsModel::Init()
     else if(!settings.value("fUseProxy").toBool() && !GetArg("-proxy", "").empty())
         addOverriddenOption("-proxy");
 
+    if (!settings.contains("fUseSeparateProxyTor"))
+        settings.setValue("fUseSeparateProxyTor", false);
+    if (!settings.contains("addrSeparateProxyTor"))
+        settings.setValue("addrSeparateProxyTor", "127.0.0.1:9050");
+    // Only try to set -onion, if user has enabled fUseSeparateProxyTor
+    if (settings.value("fUseSeparateProxyTor").toBool() && !SoftSetArg("-onion", settings.value("addrSeparateProxyTor").toString().toStdString()))
+        addOverriddenOption("-onion");
+    else if(!settings.value("fUseSeparateProxyTor").toBool() && !GetArg("-onion", "").empty())
+        addOverriddenOption("-onion");
+
     // Display
     if (!settings.contains("language"))
         settings.setValue("language", "");
@@ -178,6 +188,20 @@ QVariant OptionsModel::data(const QModelIndex & index, int role) const
             return strlIpPort.at(1);
         }
 
+        // separate Tor proxy
+        case ProxyUseTor:
+            return settings.value("fUseSeparateProxyTor", false);
+        case ProxyIPTor: {
+            // contains IP at index 0 and port at index 1
+            QStringList strlIpPort = settings.value("addrSeparateProxyTor").toString().split(":", QString::SkipEmptyParts);
+            return strlIpPort.at(0);
+        }
+        case ProxyPortTor: {
+            // contains IP at index 0 and port at index 1
+            QStringList strlIpPort = settings.value("addrSeparateProxyTor").toString().split(":", QString::SkipEmptyParts);
+            return strlIpPort.at(1);
+        }
+
 #ifdef ENABLE_WALLET
         case SpendZeroConfChange:
             return settings.value("bSpendZeroConfChange");
@@ -259,6 +283,39 @@ bool OptionsModel::setData(const QModelIndex & index, const QVariant & value, in
             }
         }
         break;
+
+        // separate Tor proxy
+        case ProxyUseTor:
+            if (settings.value("fUseSeparateProxyTor") != value) {
+                settings.setValue("fUseSeparateProxyTor", value.toBool());
+                setRestartRequired(true);
+            }
+            break;
+        case ProxyIPTor: {
+            // contains current IP at index 0 and current port at index 1
+            QStringList strlIpPort = settings.value("addrSeparateProxyTor").toString().split(":", QString::SkipEmptyParts);
+            // if that key doesn't exist or has a changed IP
+            if (!settings.contains("addrSeparateProxyTor") || strlIpPort.at(0) != value.toString()) {
+                // construct new value from new IP and current port
+                QString strNewValue = value.toString() + ":" + strlIpPort.at(1);
+                settings.setValue("addrSeparateProxyTor", strNewValue);
+                setRestartRequired(true);
+            }
+        }
+        break;
+        case ProxyPortTor: {
+            // contains current IP at index 0 and current port at index 1
+            QStringList strlIpPort = settings.value("addrSeparateProxyTor").toString().split(":", QString::SkipEmptyParts);
+            // if that key doesn't exist or has a changed port
+            if (!settings.contains("addrSeparateProxyTor") || strlIpPort.at(1) != value.toString()) {
+                // construct new value from current IP and new port
+                QString strNewValue = strlIpPort.at(0) + ":" + value.toString();
+                settings.setValue("addrSeparateProxyTor", strNewValue);
+                setRestartRequired(true);
+            }
+        }
+        break;
+
 #ifdef ENABLE_WALLET
         case SpendZeroConfChange:
             if (settings.value("bSpendZeroConfChange") != value) {

src/qt/optionsmodel.h

@@ -34,6 +34,9 @@ public:
         ProxyUse,               // bool
         ProxyIP,                // QString
         ProxyPort,              // int
+        ProxyUseTor,            // bool
+        ProxyIPTor,             // QString
+        ProxyPortTor,           // int
         DisplayUnit,            // BitcoinUnits::Unit
         ThirdPartyTxUrls,       // QString
         Language,               // QString