fix: restore dns after using xray (#1902)

service/server/router.cpp

@@ -99,6 +99,17 @@ bool Router::updateResolvers(const QString& ifname, const QList<QHostAddress>& r
 #endif
 }
 
+bool Router::restoreResolvers() {
+#ifdef Q_OS_LINUX
+    return RouterLinux::Instance().restoreResolvers();
+#endif
+#ifdef Q_OS_MACOS
+    return RouterMac::Instance().restoreResolvers();
+#endif
+#ifdef Q_OS_WIN
+    return RouterWin::Instance().restoreResolvers();
+#endif
+}
 
 void Router::StopRoutingIpv6()
 {

service/server/router.h

@@ -26,6 +26,7 @@ public:
     static void StartRoutingIpv6();
     static void StopRoutingIpv6();
     static bool updateResolvers(const QString& ifname, const QList<QHostAddress>& resolvers);
+    static bool restoreResolvers();
 };
 
 #endif // ROUTER_H

service/server/router_linux.cpp

@@ -279,6 +279,10 @@ bool RouterLinux::updateResolvers(const QString& ifname, const QList<QHostAddres
     return m_dnsUtil->updateResolvers(ifname, resolvers);
 }
 
+bool RouterLinux::restoreResolvers() {
+    return m_dnsUtil->restoreResolvers();
+}
+
 void RouterLinux::StartRoutingIpv6()
 {
     QProcess process;

service/server/router_linux.h

@@ -36,6 +36,7 @@ public:
     void StartRoutingIpv6();
     void StopRoutingIpv6();
     bool updateResolvers(const QString& ifname, const QList<QHostAddress>& resolvers);
+    bool restoreResolvers();
 public slots:
 
 private:

service/server/router_mac.cpp

@@ -158,6 +158,9 @@ bool RouterMac::updateResolvers(const QString& ifname, const QList<QHostAddress>
     return m_dnsUtil->updateResolvers(ifname, resolvers);
 }
 
+bool RouterMac::restoreResolvers() {
+    return m_dnsUtil->restoreResolvers();
+}
 
 bool RouterMac::deleteTun(const QString &dev)
 {

service/server/router_mac.h

@@ -33,6 +33,7 @@ public:
     bool createTun(const QString &dev, const QString &subnet);
     bool deleteTun(const QString &dev);
     bool updateResolvers(const QString& ifname, const QList<QHostAddress>& resolvers);
+    bool restoreResolvers();
     
 public slots:
 

service/server/router_win.cpp

@@ -443,6 +443,9 @@ bool RouterWin::updateResolvers(const QString& ifname, const QList<QHostAddress>
     return m_dnsUtil->updateResolvers(ifname, resolvers);
 }
 
+bool RouterWin::restoreResolvers() {
+    return m_dnsUtil->restoreResolvers();
+}
 
 void RouterWin::StopRoutingIpv6()
 {

service/server/router_win.h

@@ -47,6 +47,7 @@ public:
 
     void suspendWcmSvc(bool suspend);
     bool updateResolvers(const QString& ifname, const QList<QHostAddress>& resolvers);
+    bool restoreResolvers();
 
 private:
     RouterWin(RouterWin const &) = delete;