解决几处Qlist使用不规范可能导致段错误的问题

src/kylin-dbus-interface.cpp

@@ -558,6 +558,8 @@ void KylinDBus::getConnectNetIp(QString netUuid)
                                           QDBusConnection::systemBus() );
                 QDBusMessage replyIp4 = interfaceIp4.call("Get", "org.freedesktop.NetworkManager.Connection.Active", "Ip4Config");
                 QList<QVariant> outArgsIp4 = replyIp4.arguments();
+                if(false == outArgsIp4.isEmpty())
+                {
                     QVariant firstIp4 = outArgsIp4.at(0);
                     QDBusVariant dbvFirstIp4 = firstIp4.value<QDBusVariant>();
                     QVariant vFirstIp4 = dbvFirstIp4.variant();
@@ -570,6 +572,8 @@ void KylinDBus::getConnectNetIp(QString netUuid)
                     QDBusMessage replyIpv4 = interfaceIpv4.call("Get", "org.freedesktop.NetworkManager.IP4Config", "AddressData");
 
                     QList<QVariant> outArgsIpv4 = replyIpv4.arguments();
+                    if(false == outArgsIpv4.isEmpty())
+                    {
                         QVariant firstIpv4 = outArgsIpv4.at(0);
                         QDBusVariant dbvFirstIpv4 = firstIpv4.value<QDBusVariant>();
                         QVariant vFirstIpv4 = dbvFirstIpv4.variant();
@@ -577,11 +581,15 @@ void KylinDBus::getConnectNetIp(QString netUuid)
                         const QDBusArgument &dbusArgIpv4 = vFirstIpv4.value<QDBusArgument>();
                         QList<QVariantMap> mDatasIpv4;
                         dbusArgIpv4 >> mDatasIpv4;
-
+                        if(false == mDatasIpv4.isEmpty())
+                        {
                             foreach (QVariantMap mDataIpv4, mDatasIpv4) {
                                 dbusActiveLanIpv4 = mDataIpv4.value("address").toString();
                                 break;
                             }
+                        }
+                    }
+                }
 
                 //ipv6的路径信息和ip信息
                 QDBusInterface interfaceIp6( "org.freedesktop.NetworkManager",
@@ -590,6 +598,9 @@ void KylinDBus::getConnectNetIp(QString netUuid)
                                           QDBusConnection::systemBus() );
                 QDBusMessage replyIp6 = interfaceIp6.call("Get", "org.freedesktop.NetworkManager.Connection.Active", "Ip6Config");
                 QList<QVariant> outArgsIp6 = replyIp6.arguments();
+                if(outArgsIp6.isEmpty())
+                    continue;
+
                 QVariant firstIp6 = outArgsIp6.at(0);
                 QDBusVariant dbvFirstIp6 = firstIp6.value<QDBusVariant>();
                 QVariant vFirstIp6 = dbvFirstIp6.variant();
@@ -602,6 +613,9 @@ void KylinDBus::getConnectNetIp(QString netUuid)
                 QDBusMessage replyIpv6 = interfaceIpv6.call("Get", "org.freedesktop.NetworkManager.IP6Config", "AddressData");
 
                 QList<QVariant> outArgsIpv6 = replyIpv6.arguments();
+                if(outArgsIpv6.isEmpty())
+                    continue;
+
                 QVariant firstIpv6 = outArgsIpv6.at(0);
                 QDBusVariant dbvFirstIpv6 = firstIpv6.value<QDBusVariant>();
                 QVariant vFirstIpv6 = dbvFirstIpv6.variant();
@@ -609,6 +623,8 @@ void KylinDBus::getConnectNetIp(QString netUuid)
                 const QDBusArgument &dbusArgIpv6 = vFirstIpv6.value<QDBusArgument>();
                 QList<QVariantMap> mDatasIpv6;
                 dbusArgIpv6 >> mDatasIpv6;
+                if(mDatasIpv6.isEmpty())
+                    continue;
 
                 foreach (QVariantMap mDataIpv6, mDatasIpv6) {
                     dbusActiveLanIpv6 = mDataIpv6.value("address").toString();
@@ -625,6 +641,8 @@ void KylinDBus::getConnectNetIp(QString netUuid)
                                           QDBusConnection::systemBus() );
                 QDBusMessage replyIp4 = interfaceIp4.call("Get", "org.freedesktop.NetworkManager.Connection.Active", "Ip4Config");
                 QList<QVariant> outArgsIp4 = replyIp4.arguments();
+                if(false == outArgsIp4.isEmpty())
+                {
                     QVariant firstIp4 = outArgsIp4.at(0);
                     QDBusVariant dbvFirstIp4 = firstIp4.value<QDBusVariant>();
                     QVariant vFirstIp4 = dbvFirstIp4.variant();
@@ -637,6 +655,8 @@ void KylinDBus::getConnectNetIp(QString netUuid)
                     QDBusMessage replyIpv4 = interfaceIpv4.call("Get", "org.freedesktop.NetworkManager.IP4Config", "AddressData");
 
                     QList<QVariant> outArgsIpv4 = replyIpv4.arguments();
+                    if(false == outArgsIpv4.isEmpty())
+                    {
                         QVariant firstIpv4 = outArgsIpv4.at(0);
                         QDBusVariant dbvFirstIpv4 = firstIpv4.value<QDBusVariant>();
                         QVariant vFirstIpv4 = dbvFirstIpv4.variant();
@@ -644,10 +664,14 @@ void KylinDBus::getConnectNetIp(QString netUuid)
                         const QDBusArgument &dbusArgIpv4 = vFirstIpv4.value<QDBusArgument>();
                         QList<QVariantMap> mDatasIpv4;
                         dbusArgIpv4 >> mDatasIpv4;
-
+                        if(false == mDatasIpv4.isEmpty())
+                        {
                             foreach (QVariantMap mDataIpv4, mDatasIpv4) {
                                 dbusActiveWifiIpv4 = mDataIpv4.value("address").toString();
                             }
+                        }
+                    }
+                }
 
                 //ipv6的路径信息和ip信息
                 QDBusInterface interfaceIp6( "org.freedesktop.NetworkManager",
@@ -656,6 +680,8 @@ void KylinDBus::getConnectNetIp(QString netUuid)
                                           QDBusConnection::systemBus() );
                 QDBusMessage replyIp6 = interfaceIp6.call("Get", "org.freedesktop.NetworkManager.Connection.Active", "Ip6Config");
                 QList<QVariant> outArgsIp6 = replyIp6.arguments();
+                if(outArgsIp6.isEmpty())
+                    continue;
                 QVariant firstIp6 = outArgsIp6.at(0);
                 QDBusVariant dbvFirstIp6 = firstIp6.value<QDBusVariant>();
                 QVariant vFirstIp6 = dbvFirstIp6.variant();
@@ -668,6 +694,8 @@ void KylinDBus::getConnectNetIp(QString netUuid)
                 QDBusMessage replyIpv6 = interfaceIpv6.call("Get", "org.freedesktop.NetworkManager.IP6Config", "AddressData");
 
                 QList<QVariant> outArgsIpv6 = replyIpv6.arguments();
+                if(outArgsIpv6.isEmpty())
+                    continue;
                 QVariant firstIpv6 = outArgsIpv6.at(0);
                 QDBusVariant dbvFirstIpv6 = firstIpv6.value<QDBusVariant>();
                 QVariant vFirstIpv6 = dbvFirstIpv6.variant();
@@ -675,7 +703,8 @@ void KylinDBus::getConnectNetIp(QString netUuid)
                 const QDBusArgument &dbusArgIpv6 = vFirstIpv6.value<QDBusArgument>();
                 QList<QVariantMap> mDatasIpv6;
                 dbusArgIpv6 >> mDatasIpv6;
-
+                if(mDatasIpv6.isEmpty())
+                    continue;
                 foreach (QVariantMap mDataIpv6, mDatasIpv6) {
                     dbusActiveWifiIpv6 = mDataIpv6.value("address").toString();
                 }
@@ -1422,6 +1451,8 @@ QList<QString> KylinDBus::getAtiveWifiBSsidUuid(QStringList wifilist)
             QDBusMessage resultConnection = interfaceInfo.call("Get", "org.freedesktop.NetworkManager.Connection.Active", "Connection");
 
             QList<QVariant> outArgsConnection = resultConnection.arguments();
+            if(outArgsConnection.isEmpty())
+                continue;
             QVariant firstConnection = outArgsConnection.at(0);
             QDBusVariant dbvFirstConnection = firstConnection.value<QDBusVariant>();
             QVariant vFirstConnection = dbvFirstConnection.variant();
@@ -1432,7 +1463,8 @@ QList<QString> KylinDBus::getAtiveWifiBSsidUuid(QStringList wifilist)
                                       "org.freedesktop.NetworkManager.Settings.Connection",
                                       QDBusConnection::systemBus());
             QDBusMessage resultSet = interfaceSet.call("GetSettings");
-
+            if(resultSet.arguments().isEmpty())
+                continue;
             const QDBusArgument &dbusArg1stSet = resultSet.arguments().at( 0 ).value<QDBusArgument>();
             QMap<QString,QMap<QString,QVariant>> mapSet;
             dbusArg1stSet >> mapSet;