fix: app freeze on quit (#1804)

* fix: app freeze on quit

* fix: typo in VpnConnection destructor

* add trace info

* add more trace info

* set timelimit for flushDns

* Refactor IpcClient::Interface access logic

* cleanup unused variable

* cleanup trace info

* fix: remove second disconnect from VPN on app close

* this object will be deleted at app close

* Don't terminate VPN thread on Linux

* Revert "Don't terminate VPN thread on Linux"

This reverts commit 20e4ea2d4a.

* disconnect all signals from vpnconnection on exit

* add interruption request on vpnConnectionThread

* use checktimer only for iOS

* disconnect all signals from vpnconnection on exit

* disconnect signals on exit before VPN disconnect

* add disconnectSlots method

* fix: add allow traffic rules on killswitch disable

* wait for response from service before object destroy

* change disconnect from vpn order

* add delay for connection close

* change disconnect method order

* use stop method for protocol disconnecect

* change disconnect method order

* allow dns traffic after app close

* delete tun on disconnect

---------

Co-authored-by: vkamn <vk@amnezia.org>

client/amnezia_application.cpp

@@ -55,8 +55,20 @@ AmneziaApplication::AmneziaApplication(int &argc, char *argv[]) : AMNEZIA_BASE_C
 
 AmneziaApplication::~AmneziaApplication()
 {
+    if (m_vpnConnection) {
+        QMetaObject::invokeMethod(m_vpnConnection.get(), "disconnectSlots", Qt::QueuedConnection);
+        QMetaObject::invokeMethod(m_vpnConnection.get(), "disconnectFromVpn", Qt::QueuedConnection);
+        QThread::msleep(2000);
+    }
+
+    m_vpnConnectionThread.requestInterruption();
     m_vpnConnectionThread.quit();
 
+    if (!m_vpnConnectionThread.wait(3000)) {
+        m_vpnConnectionThread.terminate();
+        m_vpnConnectionThread.wait(500);
+    }
+
     if (m_engine) {
         QObject::disconnect(m_engine, 0, 0, 0);
         delete m_engine;

client/core/ipcclient.cpp

@@ -85,8 +85,9 @@ bool IpcClient::init(IpcClient *instance)
     }
 
     qDebug() << "IpcClient::init succeed";
+    instance->m_isSocketConnected = (Instance()->m_ipcClient->isReplicaValid() && Instance()->m_Tun2SocksClient->isReplicaValid());
 
-    return (Instance()->m_ipcClient->isReplicaValid() && Instance()->m_Tun2SocksClient->isReplicaValid());
+    return Instance()->isSocketConnected();
 }
 
 QSharedPointer<PrivilegedProcess> IpcClient::CreatePrivilegedProcess()

client/protocols/openvpnprotocol.cpp

@@ -56,7 +56,8 @@ void OpenVpnProtocol::stop()
     }
 
 #if defined(Q_OS_WIN) || defined(Q_OS_LINUX) || defined(Q_OS_MACOS)
-    IpcClient::Interface()->disableKillSwitch();
+    QRemoteObjectPendingReply<bool> disableKillSwitchResp = IpcClient::Interface()->disableKillSwitch();
+    disableKillSwitchResp.waitForFinished(1000);
 #endif
 
     setConnectionState(Vpn::ConnectionState::Disconnected);

client/protocols/xrayprotocol.cpp

@@ -166,10 +166,17 @@ ErrorCode XrayProtocol::startTun2Sock()
 
 void XrayProtocol::stop()
 {
-#if defined(Q_OS_WIN) || defined(Q_OS_LINUX) || defined(Q_OS_MACOS)
+#ifdef AMNEZIA_DESKTOP
-    IpcClient::Interface()->disableKillSwitch();
+    QRemoteObjectPendingReply<bool> disableKillSwitchResp = IpcClient::Interface()->disableKillSwitch();
-    IpcClient::Interface()->StartRoutingIpv6();
+    disableKillSwitchResp.waitForFinished(1000);
-    IpcClient::Interface()->restoreResolvers();
+    QRemoteObjectPendingReply<bool> StartRoutingIpv6Resp = IpcClient::Interface()->StartRoutingIpv6();
+    StartRoutingIpv6Resp.waitForFinished(1000);
+    QRemoteObjectPendingReply<bool> restoreResolvers = IpcClient::Interface()->restoreResolvers();
+    restoreResolvers.waitForFinished(1000);
+#if !defined(Q_OS_MACOS)
+    QRemoteObjectPendingReply<bool> deleteTunResp = IpcClient::Interface()->deleteTun("tun2");
+    deleteTunResp.waitForFinished(1000);
+#endif
 #endif
     qDebug() << "XrayProtocol::stop()";
     m_xrayProcess.disconnect();
@@ -177,6 +184,7 @@ void XrayProtocol::stop()
     m_xrayProcess.waitForFinished(3000);
     if (m_t2sProcess) {
         m_t2sProcess->stop();
+        QThread::msleep(200);
     }
 
     setConnectionState(Vpn::ConnectionState::Disconnected);

client/vpnconnection.cpp

@@ -32,8 +32,8 @@
 VpnConnection::VpnConnection(std::shared_ptr<Settings> settings, QObject *parent)
     : QObject(parent), m_settings(settings), m_checkTimer(new QTimer(this))
 {
-    m_checkTimer.setInterval(1000);
 #if defined(Q_OS_IOS) || defined(MACOS_NE)
+    m_checkTimer.setInterval(1000);
     connect(IosController::Instance(), &IosController::connectionStateChanged, this, &VpnConnection::onConnectionStateChanged);
     connect(IosController::Instance(), &IosController::bytesChanged, this, &VpnConnection::onBytesChanged);
 
@@ -42,9 +42,6 @@ VpnConnection::VpnConnection(std::shared_ptr<Settings> settings, QObject *parent
 
 VpnConnection::~VpnConnection()
 {
-#if defined AMNEZIA_DESKTOP
-    disconnectFromVpn();
-#endif
 }
 
 void VpnConnection::onBytesChanged(quint64 receivedBytes, quint64 sentBytes)
@@ -55,19 +52,7 @@ void VpnConnection::onBytesChanged(quint64 receivedBytes, quint64 sentBytes)
 void VpnConnection::onKillSwitchModeChanged(bool enabled)
 {
 #ifdef AMNEZIA_DESKTOP
-    if (!m_IpcClient) {
+    if (InterfaceReady()) {
-        m_IpcClient = new IpcClient(this);
-    }
-
-    if (!m_IpcClient->isSocketConnected()) {
-        if (!IpcClient::init(m_IpcClient)) {
-            qWarning() << "Error occurred when init IPC client";
-            emit serviceIsNotReady();
-            return;
-        }
-    }
-
-    if (IpcClient::Interface()) {
         qDebug() << "Set KillSwitch Strict mode enabled " << enabled;
         IpcClient::Interface()->refreshKillSwitch(enabled);
     }
@@ -80,7 +65,7 @@ void VpnConnection::onConnectionStateChanged(Vpn::ConnectionState state)
 #ifdef AMNEZIA_DESKTOP
     auto container = m_settings->defaultContainer(m_settings->defaultServerIndex());
 
-    if (IpcClient::Interface()) {
+    if (InterfaceReady()) {
         if (state == Vpn::ConnectionState::Connected) {
             IpcClient::Interface()->resetIpStack();
             IpcClient::Interface()->flushDns();
@@ -212,14 +197,41 @@ void VpnConnection::deleteRoutes(const QStringList &ips)
 #endif
 }
 
+bool VpnConnection::InterfaceReady()
+{
+#ifdef AMNEZIA_DESKTOP
+    if (!m_IpcClient) {
+        m_IpcClient = new IpcClient(this);
+    }
+
+    if (!m_IpcClient->isSocketConnected()) {
+        if (!IpcClient::init(m_IpcClient)) {
+            qWarning() << "Error occurred when init IPC client";
+            emit serviceIsNotReady();
+            return false;
+        }
+    }
+
+    return IpcClient::Interface() != nullptr;
+#endif
+    return true;
+}
+
 void VpnConnection::flushDns()
 {
 #ifdef AMNEZIA_DESKTOP
-    if (IpcClient::Interface())
+    if (InterfaceReady())
         IpcClient::Interface()->flushDns();
 #endif
 }
 
+void VpnConnection::disconnectSlots()
+{
+    if (m_vpnProtocol) {
+        m_vpnProtocol->disconnect();
+    }
+}
+
 ErrorCode VpnConnection::lastError() const
 {
 #ifdef Q_OS_ANDROID
@@ -240,20 +252,11 @@ void VpnConnection::connectToVpn(int serverIndex, const ServerCredentials &crede
                         .arg(serverIndex)
                         .arg(ContainerProps::containerToString(container))
              << m_settings->routeMode();
-#if !defined(Q_OS_ANDROID) && !defined(Q_OS_IOS) && !defined(MACOS_NE)
-    if (!m_IpcClient) {
-        m_IpcClient = new IpcClient(this);
-    }
 
-    if (!m_IpcClient->isSocketConnected()) {
+    if (!InterfaceReady()) {
-        if (!IpcClient::init(m_IpcClient)) {
+        emit connectionStateChanged(Vpn::ConnectionState::Error);
-            qWarning() << "Error occurred when init IPC client";
+        return;
-            emit serviceIsNotReady();
-            emit connectionStateChanged(Vpn::ConnectionState::Error);
-            return;
-        }
     }
-#endif
 
     m_remoteAddress = NetworkUtilities::getIPAddress(credentials.hostName);
     emit connectionStateChanged(Vpn::ConnectionState::Connecting);
@@ -440,13 +443,18 @@ QString VpnConnection::bytesPerSecToText(quint64 bytes)
 void VpnConnection::disconnectFromVpn()
 {
 #ifdef AMNEZIA_DESKTOP
-    QString proto = m_settings->defaultContainerName(m_settings->defaultServerIndex());
+    if (InterfaceReady()) {
-    if (IpcClient::Interface()) {
-        IpcClient::Interface()->flushDns();
 
+        m_vpnProtocol.data()->stop();
+        qDebug() << "Interface is ready!";
+
+        QRemoteObjectPendingReply<bool> flushDnsResp = IpcClient::Interface()->flushDns();
+        flushDnsResp.waitForFinished(1000);
+
+        qDebug() << "Flushed DNS";
         // delete cached routes
-        QRemoteObjectPendingReply<bool> response = IpcClient::Interface()->clearSavedRoutes();
+        QRemoteObjectPendingReply<bool> clearSavedRoutesResp = IpcClient::Interface()->clearSavedRoutes();
-        response.waitForFinished(1000);
+        clearSavedRoutesResp.waitForFinished(1000);
     }
 #endif
 
@@ -475,12 +483,13 @@ void VpnConnection::disconnectFromVpn()
         return;
     }
 
-#ifndef Q_OS_ANDROID
+#if !defined(Q_OS_ANDROID) && !defined(AMNEZIA_DESKTOP)
     if (m_vpnProtocol) {
         m_vpnProtocol->deleteLater();
     }
-    m_vpnProtocol = nullptr;
 #endif
+
+    m_vpnProtocol = nullptr;
 }
 
 Vpn::ConnectionState VpnConnection::connectionState()

client/vpnconnection.h

@@ -56,6 +56,7 @@ public slots:
     void deleteRoutes(const QStringList &ips);
     void flushDns();
     void onKillSwitchModeChanged(bool enabled);
+    void disconnectSlots();
 
 signals:
     void bytesChanged(quint64 receivedBytes, quint64 sentBytes);
@@ -95,6 +96,7 @@ private:
 
    void appendSplitTunnelingConfig();
    void appendKillSwitchConfig();
+   bool InterfaceReady();
 };
 
 #endif // VPNCONNECTION_H

ipc/ipc_interface.rep

@@ -12,7 +12,7 @@ class IpcInterface
     SLOT( int routeAddList(const QString &gw, const QStringList &ips) );
     SLOT( bool clearSavedRoutes() );
     SLOT( bool routeDeleteList(const QString &gw, const QStringList &ip) );
-    SLOT( void flushDns() );
+    SLOT( bool flushDns() );
     SLOT( void resetIpStack() );
 
     SLOT( bool checkAndInstallDriver() );
@@ -25,8 +25,8 @@ class IpcInterface
     SLOT( bool createTun(const QString &dev, const QString &subnet) );
     SLOT( bool deleteTun(const QString &dev) );
 
-    SLOT( void StartRoutingIpv6() );
+    SLOT( bool StartRoutingIpv6() );
-    SLOT( void StopRoutingIpv6() );
+    SLOT( bool StopRoutingIpv6() );
 
     SLOT( bool disableKillSwitch() );
     SLOT( bool disableAllTraffic() );

ipc/ipcserver.cpp

@@ -83,7 +83,7 @@ bool IpcServer::routeDeleteList(const QString &gw, const QStringList &ips)
     return Router::routeDeleteList(gw, ips);
 }
 
-void IpcServer::flushDns()
+bool IpcServer::flushDns()
 {
 #ifdef MZ_DEBUG
     qDebug() << "IpcServer::flushDns";
@@ -161,13 +161,14 @@ bool IpcServer::restoreResolvers() {
     return Router::restoreResolvers();
 }
 
-void IpcServer::StartRoutingIpv6()
+bool IpcServer::StartRoutingIpv6()
 {
-    Router::StartRoutingIpv6();
+    return Router::StartRoutingIpv6();
 }
-void IpcServer::StopRoutingIpv6()
+
+bool IpcServer::StopRoutingIpv6()
 {
-    Router::StopRoutingIpv6();
+    return Router::StopRoutingIpv6();
 }
 
 void IpcServer::setLogsEnabled(bool enabled)

ipc/ipcserver.h

@@ -23,7 +23,7 @@ public:
     virtual int routeAddList(const QString &gw, const QStringList &ips) override;
     virtual bool clearSavedRoutes() override;
     virtual bool routeDeleteList(const QString &gw, const QStringList &ips) override;
-    virtual void flushDns() override;
+    virtual bool flushDns() override;
     virtual void resetIpStack() override;
     virtual bool checkAndInstallDriver() override;
     virtual QStringList getTapList() override;
@@ -32,8 +32,8 @@ public:
     virtual void setLogsEnabled(bool enabled) override;
     virtual bool createTun(const QString &dev, const QString &subnet) override;
     virtual bool deleteTun(const QString &dev) override;
-    virtual void StartRoutingIpv6() override;
+    virtual bool StartRoutingIpv6() override;
-    virtual void StopRoutingIpv6() override;
+    virtual bool StopRoutingIpv6() override;
     virtual bool disableAllTraffic() override;
     virtual bool addKillSwitchAllowedRange(QStringList ranges) override;
     virtual bool resetKillSwitchAllowedRange(QStringList ranges) override;

service/server/killswitch.cpp

@@ -98,6 +98,17 @@ bool KillSwitch::disableKillSwitch() {
         LinuxFirewall::setAnchorEnabled(LinuxFirewall::IPv4, QStringLiteral("320.allowDNS"), false);
         LinuxFirewall::setAnchorEnabled(LinuxFirewall::Both, QStringLiteral("400.allowPIA"), false);
     } else {
+        LinuxFirewall::setAnchorEnabled(LinuxFirewall::Both, QStringLiteral("000.allowLoopback"), true);
+        LinuxFirewall::setAnchorEnabled(LinuxFirewall::Both, QStringLiteral("100.blockAll"), false);
+        LinuxFirewall::setAnchorEnabled(LinuxFirewall::IPv4, QStringLiteral("110.allowNets"), false);
+        LinuxFirewall::setAnchorEnabled(LinuxFirewall::IPv4, QStringLiteral("120.blockNets"), false);
+        LinuxFirewall::setAnchorEnabled(LinuxFirewall::IPv4, QStringLiteral("200.allowVPN"), false);
+        LinuxFirewall::setAnchorEnabled(LinuxFirewall::IPv6, QStringLiteral("250.blockIPv6"), false);
+        LinuxFirewall::setAnchorEnabled(LinuxFirewall::Both, QStringLiteral("290.allowDHCP"), true);
+        LinuxFirewall::setAnchorEnabled(LinuxFirewall::Both, QStringLiteral("300.allowLAN"), true);
+        LinuxFirewall::setAnchorEnabled(LinuxFirewall::IPv4, QStringLiteral("310.blockDNS"), false);
+        LinuxFirewall::setAnchorEnabled(LinuxFirewall::IPv4, QStringLiteral("320.allowDNS"), true);
+        LinuxFirewall::setAnchorEnabled(LinuxFirewall::Both, QStringLiteral("400.allowPIA"), false);
         LinuxFirewall::uninstall();
     }
 #endif

service/server/router.cpp

@@ -42,14 +42,14 @@ int Router::routeDeleteList(const QString &gw, const QStringList &ips)
 #endif
 }
 
-void Router::flushDns()
+bool Router::flushDns()
 {
 #ifdef Q_OS_WIN
-    RouterWin::Instance().flushDns();
+    return RouterWin::Instance().flushDns();
 #elif defined (Q_OS_MAC)
-    RouterMac::Instance().flushDns();
+    return RouterMac::Instance().flushDns();
 #elif defined Q_OS_LINUX
-    RouterLinux::Instance().flushDns();
+    return RouterLinux::Instance().flushDns();
 #endif
 }
 
@@ -111,25 +111,25 @@ bool Router::restoreResolvers() {
 #endif
 }
 
-void Router::StopRoutingIpv6()
+bool Router::StopRoutingIpv6()
 {
 #ifdef Q_OS_WIN
-    RouterWin::Instance().StopRoutingIpv6();
+    return RouterWin::Instance().StopRoutingIpv6();
 #elif defined (Q_OS_MAC)
-    // todo fixme
+    return true;// todo fixme
 #elif defined Q_OS_LINUX
-    RouterLinux::Instance().StopRoutingIpv6();
+    return RouterLinux::Instance().StopRoutingIpv6();
 #endif
 }
 
-void Router::StartRoutingIpv6()
+bool Router::StartRoutingIpv6()
 {
 #ifdef Q_OS_WIN
-    RouterWin::Instance().StartRoutingIpv6();
+    return RouterWin::Instance().StartRoutingIpv6();
 #elif defined (Q_OS_MAC)
-    // todo fixme
+    return true;// todo fixme
 #elif defined Q_OS_LINUX
-    RouterLinux::Instance().StartRoutingIpv6();
+    return RouterLinux::Instance().StartRoutingIpv6();
 #endif
 }
 

service/server/router.h

@@ -19,12 +19,12 @@ public:
     static int routeAddList(const QString &gw, const QStringList &ips);
     static bool clearSavedRoutes();
     static int routeDeleteList(const QString &gw, const QStringList &ips);
-    static void flushDns();
+    static bool flushDns();
     static void resetIpStack();
     static bool createTun(const QString &dev, const QString &subnet);
     static bool deleteTun(const QString &dev);
-    static void StartRoutingIpv6();
+    static bool StartRoutingIpv6();
-    static void StopRoutingIpv6();
+    static bool StopRoutingIpv6();
     static bool updateResolvers(const QString& ifname, const QList<QHostAddress>& resolvers);
     static bool restoreResolvers();
 };

service/server/router_linux.cpp

@@ -160,7 +160,7 @@ bool RouterLinux::isServiceActive(const QString &serviceName) {
     return process.exitCode() == 0;
 }
 
-void RouterLinux::flushDns()
+bool RouterLinux::flushDns()
 {
     QProcess p;
     p.setProcessChannelMode(QProcess::MergedChannels);
@@ -174,7 +174,7 @@ void RouterLinux::flushDns()
         p.start("systemctl", { "restart", "systemd-resolved" });
     } else {
         qDebug() << "No suitable DNS manager found.";
-        return;
+        return false;
     }
 
     p.waitForFinished();
@@ -183,6 +183,8 @@ void RouterLinux::flushDns()
         qDebug().noquote() << "Flush dns completed";
     else
         qDebug().noquote() << "OUTPUT systemctl restart nscd/systemd-resolved: " + output;
+
+    return true;
 }
 
 bool RouterLinux::createTun(const QString &dev, const QString &subnet) {
@@ -283,7 +285,7 @@ bool RouterLinux::restoreResolvers() {
     return m_dnsUtil->restoreResolvers();
 }
 
-void RouterLinux::StartRoutingIpv6()
+bool RouterLinux::StartRoutingIpv6()
 {
     QProcess process;
     QStringList commands;
@@ -293,12 +295,12 @@ void RouterLinux::StartRoutingIpv6()
     if (!process.waitForStarted(1000))
     {
         qDebug().noquote() << "Could not start activate ipv6\n";
-        return;
+        return false;
     }
     else if (!process.waitForFinished(2000))
     {
         qDebug().noquote() << "Could not activate ipv6\n";
-        return;
+        return false;
     }
     commands.clear();
 
@@ -307,19 +309,20 @@ void RouterLinux::StartRoutingIpv6()
     if (!process.waitForStarted(1000))
     {
         qDebug().noquote() << "Could not start activate ipv6\n";
-        return;
+        return false;
     }
     else if (!process.waitForFinished(2000))
     {
         qDebug().noquote() << "Could not activate ipv6\n";
-        return;
+        return false;
     }
     commands.clear();
 
     qDebug().noquote() << "StartRoutingIpv6 OK";
+    return true;
 }
 
-void RouterLinux::StopRoutingIpv6()
+bool RouterLinux::StopRoutingIpv6()
 {
     QProcess process;
     QStringList commands;
@@ -329,12 +332,12 @@ void RouterLinux::StopRoutingIpv6()
     if (!process.waitForStarted(1000))
     {
         qDebug().noquote() << "Could not start disable ipv6\n";
-        return;
+        return false;
     }
     else if (!process.waitForFinished(2000))
     {
         qDebug().noquote() << "Could not disable ipv6\n";
-        return;
+        return false;
     }
     commands.clear();
 
@@ -343,14 +346,15 @@ void RouterLinux::StopRoutingIpv6()
     if (!process.waitForStarted(1000))
     {
         qDebug().noquote() << "Could not start disable ipv6\n";
-        return;
+        return false;
     }
     else if (!process.waitForFinished(2000))
     {
         qDebug().noquote() << "Could not disable ipv6\n";
-        return;
+        return false;
     }
     commands.clear();
 
     qDebug().noquote() << "StopRoutingIpv6 OK";
+    return true;
 }

service/server/router_linux.h

@@ -30,11 +30,11 @@ public:
     bool routeDelete(const QString &ip, const QString &gw, const int &sock);
     bool routeDeleteList(const QString &gw, const QStringList &ips);
     QString getgatewayandiface();
-    void flushDns();
+    bool flushDns();
     bool createTun(const QString &dev, const QString &subnet);
     bool deleteTun(const QString &dev);
-    void StartRoutingIpv6();
+    bool StartRoutingIpv6();
-    void StopRoutingIpv6();
+    bool StopRoutingIpv6();
     bool updateResolvers(const QString& ifname, const QList<QHostAddress>& resolvers);
     bool restoreResolvers();
 public slots:

service/server/router_mac.cpp

@@ -169,7 +169,7 @@ bool RouterMac::deleteTun(const QString &dev)
     return true;
 }
 
-void RouterMac::flushDns()
+bool RouterMac::flushDns()
 {
     // sudo killall -HUP mDNSResponder
     QProcess p;
@@ -177,5 +177,7 @@ void RouterMac::flushDns()
 
     p.start("killall", QStringList() << "-HUP" << "mDNSResponder");
     p.waitForFinished();
+    
     qDebug().noquote() << "OUTPUT killall -HUP mDNSResponder: " + p.readAll();
+    return true;
 }

service/server/router_mac.h

@@ -29,7 +29,7 @@ public:
     bool clearSavedRoutes();
     bool routeDelete(const QString &ip, const QString &gw);
     bool routeDeleteList(const QString &gw, const QStringList &ips);
-    void flushDns();
+    bool flushDns();
     bool createTun(const QString &dev, const QString &subnet);
     bool deleteTun(const QString &dev);
     bool updateResolvers(const QString& ifname, const QList<QHostAddress>& resolvers);

service/server/router_win.cpp

@@ -273,7 +273,7 @@ int RouterWin::routeDeleteList(const QString &gw, const QStringList &ips)
     return success_count;
 }
 
-void RouterWin::flushDns()
+bool RouterWin::flushDns()
 {
     QProcess p;
     p.setProcessChannelMode(QProcess::MergedChannels);
@@ -281,6 +281,7 @@ void RouterWin::flushDns()
 
     p.start(command);
     p.waitForFinished();
+    return true;
     //qDebug().noquote() << "OUTPUT ipconfig /flushdns: " + p.readAll();
 }
 
@@ -447,7 +448,7 @@ bool RouterWin::restoreResolvers() {
     return m_dnsUtil->restoreResolvers();
 }
 
-void RouterWin::StopRoutingIpv6()
+bool RouterWin::StopRoutingIpv6()
 {
     {
         QProcess p;
@@ -467,9 +468,10 @@ void RouterWin::StopRoutingIpv6()
         p.start(command);
         p.waitForFinished();
     }
+    return true;
 }
 
-void RouterWin::StartRoutingIpv6()
+bool RouterWin::StartRoutingIpv6()
 {
     {
         QProcess p;
@@ -489,5 +491,6 @@ void RouterWin::StartRoutingIpv6()
         p.start(command);
         p.waitForFinished();
     }
+    return true;
 }
 

service/server/router_win.h

@@ -39,11 +39,11 @@ public:
     int routeAddList(const QString &gw, const QStringList &ips);
     bool clearSavedRoutes();
     int routeDeleteList(const QString &gw, const QStringList &ips);
-    void flushDns();
+    bool flushDns();
     void resetIpStack();
 
-    void StartRoutingIpv6();
+    bool StartRoutingIpv6();
-    void StopRoutingIpv6();
+    bool StopRoutingIpv6();
 
     void suspendWcmSvc(bool suspend);
     bool updateResolvers(const QString& ifname, const QList<QHostAddress>& resolvers);