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sym_iap_util.h Example File
network/qftp/sym_iap_util.h

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 #ifndef QSYM_IAP_UTIL_H
 #define QSYM_IAP_UTIL_H

 // Symbian
 #include <utf.h>
 #include <es_sock.h>
 #include <in_sock.h>
 #include <es_enum.h>
 #include <in_iface.h>
 #include <commdbconnpref.h>
 #include <e32cmn.h>

 // OpenC
 #include <sys/socket.h>
 #include <net/if.h>

 //Qt
 #include <QSettings>
 #include <QStringList>
 //#include <QTextCodec>

 _LIT(KIapNameSetting, "IAP\\Name");             // text - mandatory
 _LIT(KIapDialogPref, "IAP\\DialogPref");        // TUnit32 - optional
 _LIT(KIapService, "IAP\\IAPService");           // TUnit32 - mandatory
 _LIT(KIapServiceType, "IAP\\IAPServiceType");   // text - mandatory
 _LIT(KIapBearer, "IAP\\IAPBearer");             // TUint32 - optional
 _LIT(KIapBearerType, "IAP\\IAPBearerType");     // text - optional
 _LIT(KIapNetwork, "IAP\\IAPNetwork");           // TUint32 - optional

 const QLatin1String qtOrganizationTag("Trolltech");
 const QLatin1String qtNetworkModuleTag("QtNetwork");
 const QLatin1String iapGroupTag("IAP");
 const QLatin1String iapNamesArrayTag("Names");
 const QLatin1String iapNameItemTag("Name");

 static QTextCodec *utf16LETextCodec = 0;

 void clearIapNamesSettings(QSettings &settings) {
     settings.beginGroup(qtNetworkModuleTag);
         settings.beginGroup(iapGroupTag);
            settings.remove(iapNamesArrayTag);
         settings.endGroup();
     settings.endGroup();
 }

 void writeIapNamesSettings(QSettings &settings, const QStringList& iapNames) {
     clearIapNamesSettings(settings);
     settings.beginGroup(qtNetworkModuleTag);
         settings.beginGroup(iapGroupTag);
             settings.beginWriteArray(iapNamesArrayTag);
             for (int index = 0; index < iapNames.size(); ++index) {
                 settings.setArrayIndex(index);
                 settings.setValue(iapNameItemTag, iapNames.at(index));
             }
             settings.endArray();
         settings.endGroup();
     settings.endGroup();
 }

 void readIapNamesSettings(QSettings &settings, QStringList& iapNames) {
     settings.beginGroup(qtNetworkModuleTag);
         settings.beginGroup(iapGroupTag);
             int last = settings.beginReadArray(iapNamesArrayTag);
             for (int index = 0; index < last; ++index) {
                 settings.setArrayIndex(index);
                 iapNames.append(settings.value(iapNameItemTag).toString());
             }
             settings.endArray();
         settings.endGroup();
     settings.endGroup();
 }

 static QString qt_TNameToQString(TName data) {
     if(utf16LETextCodec == 0)
         utf16LETextCodec = QTextCodec::codecForName("UTF-16LE");

     QByteArray tmpByteArray = QByteArray::fromRawData((char*)(data.PtrZ()), data.Length() * 2);
     return utf16LETextCodec->toUnicode(tmpByteArray);
 }

 static QString qt_InterfaceInfoL()
 {
     QString output;

     TBuf8<512> buffer;
     TBuf<128> t;
     TAutoClose<RSocketServ> ss;
     User::LeaveIfError(ss.iObj.Connect());
     ss.PushL();

     TAutoClose<RSocket> sock;
     User::LeaveIfError(sock.iObj.Open(ss.iObj, _L("udp")));
     sock.PushL();

     User::LeaveIfError(sock.iObj.SetOpt(KSoInetEnumInterfaces, KSolInetIfCtrl));

     TProtocolDesc in;
     User::LeaveIfError(sock.iObj.Info(in));
     printf("EPOC32 IP Configuration TCPIP Version %d.%d.%d\n", in.iVersion.iMajor, in.iVersion.iMinor, in.iVersion.iBuild);

     TPckgBuf<TSoInetInterfaceInfo> info, next;

     TInt res=sock.iObj.GetOpt(KSoInetNextInterface, KSolInetIfCtrl, info);
     if(res!=KErrNone)
         User::Leave(res);
     TInt count = 0;
     while(res==KErrNone) {
         res=sock.iObj.GetOpt(KSoInetNextInterface, KSolInetIfCtrl, next);

         if(info().iName != _L("") && info().iName != _L("loop6") && info().iName != _L("loop4")) {
             printf("Interface %d\n", count++);

             printf("Name \"%s\"\n", qt_TNameToQString(info().iName).toLatin1().data());
             printf("NIF tag \"%s\"\n", qt_TNameToQString(info().iTag).toLatin1().data());

             printf("State ");
             switch (info().iState)
             {
                 case EIfPending:
                     printf("pending\n");
                     break;
                 case EIfUp:
                     printf("up\n");
                     break;
                 case EIfBusy:
                     printf("busy\n");
                     break;
                 default:
                     printf("down\n");
                     break;
             }

             printf("Mtu %d\n", info().iMtu);
             printf("Speed Metric %d\n", info().iSpeedMetric);

             printf("Features:");
             info().iFeatures & KIfIsLoopback         ? printf(" loopback") : printf("");
             info().iFeatures & KIfIsDialup           ? printf(" dialup") : printf("");
             info().iFeatures & KIfIsPointToPoint     ? printf(" pointtopoint") : printf("");
             info().iFeatures & KIfCanBroadcast       ? printf(" canbroadcast") : printf("");
             info().iFeatures & KIfCanMulticast       ? printf(" canmulticast") : printf("");
             info().iFeatures & KIfCanSetMTU          ? printf(" cansetmtu") : printf("");
             info().iFeatures & KIfHasHardwareAddr    ? printf(" hardwareaddr") : printf("");
             info().iFeatures & KIfCanSetHardwareAddr ? printf(" cansethardwareaddr") : printf("");
             printf("\n");

             TName address;
             info().iAddress.Output(address);
             printf("Addr: %s\n", qt_TNameToQString(address).toLatin1().data());

             if(info().iAddress.IsLinkLocal()) {
                 printf("  -link local\n");
             } else if(info().iAddress.IsSiteLocal()) {
                 printf("  -site local\n");
             } else {
                 printf("  -global\n");
             }

             info().iNetMask.Output(address);
             printf("Netmask %s\n", qt_TNameToQString(address).toLatin1().data());

             info().iBrdAddr.Output(address);
             printf("Broadcast address %s\n", qt_TNameToQString(address).toLatin1().data());

             info().iDefGate.Output(address);
             printf("Gatew: %s\n", qt_TNameToQString(address).toLatin1().data());

             info().iNameSer1.Output(address);
             printf("DNS 1: %s\n", qt_TNameToQString(address).toLatin1().data());

             info().iNameSer2.Output(address);
             printf("DNS 2: %s\n", qt_TNameToQString(address).toLatin1().data());

             if (info().iHwAddr.Family() != KAFUnspec) {
                 printf("Hardware address ");
                 TUint j;
                 for(j = sizeof(SSockAddr) ; j < sizeof(SSockAddr) + 6 ; ++j) {
                     if(j < (TUint)info().iHwAddr.Length()) {
                         printf("%02X", info().iHwAddr[j]);
                     } else {
                         printf("??");
                     }
                     if(j < sizeof(SSockAddr) + 5)
                         printf("-");
                     else
                         printf("\n");
                     }
                 }
             }
         if(res == KErrNone) {
             info = next;
             printf("\n");
         } else {
             printf("\n");
         }
     }

     sock.Pop();
     ss.Pop();

     return output;
 }

 static QString qt_RouteInfoL() {
     QString output;
     TAutoClose<RSocketServ> ss;
     User::LeaveIfError(ss.iObj.Connect());
     ss.PushL();

     TAutoClose<RSocket> sock;
     User::LeaveIfError(sock.iObj.Open(ss.iObj, _L("udp")));
     sock.PushL();

     TSoInetRouteInfo routeInfo;
     TPckg<TSoInetRouteInfo> routeInfoPkg(routeInfo);

     TName destAddr;
     TName netMask;
     TName gateway;
     TName ifAddr;

     // Begins enumeration of routes by setting this option
     User::LeaveIfError(sock.iObj.SetOpt(KSoInetEnumRoutes, KSolInetRtCtrl));

     // The TSoInetRouteInfo contains information for a new route each time GetOpt returns KErrNone
     for(TInt i = 0; sock.iObj.GetOpt(KSoInetNextRoute, KSolInetRtCtrl, routeInfoPkg) == KErrNone ; i++)
     {
       // Extract the destination and netmask
       routeInfo.iDstAddr.Output(destAddr);
       routeInfo.iNetMask.Output(netMask);
       routeInfo.iGateway.Output(gateway);
       routeInfo.iIfAddr.Output(ifAddr);
 /*
       if(destAddr.Length() <= 2)
           continue;

       if(netMask.Find(_L("255.255.255.255")) != KErrNotFound
               || netMask.Find(_L("0.0.0.0")) != KErrNotFound
               || netMask.Find(_L("ffff:ffff:ffff:ffff")) != KErrNotFound)
           continue;
 */
       printf("Route Info #[%i]\n", i);
       printf("DstAddr %s\n", qt_TNameToQString(destAddr).toLatin1().data());
       printf("NetMask %s\n", qt_TNameToQString(netMask).toLatin1().data());
       printf("Gateway %s\n", qt_TNameToQString(gateway).toLatin1().data());
       printf("IfAddr %s\n", qt_TNameToQString(ifAddr).toLatin1().data());
       printf("\n");
     }

     sock.Pop();
     ss.Pop();

     return output;
 }

 QString qt_TDesC2QStringL(const TDesC& aDescriptor)
 {
 #ifdef QT_NO_UNICODE
     return QString::fromLocal8Bit(aDescriptor.Ptr(), aDescriptor.Length());
 #else
     return QString::fromUtf16(aDescriptor.Ptr(), aDescriptor.Length());
 #endif
 }

 static bool qt_SetDefaultIapName(const QString &iapName, int &error) {
     struct ifreq ifReq;
     // clear structure
     memset(&ifReq, 0, sizeof(struct ifreq));
     // set IAP name value
     // make sure it is in UTF8
     strcpy(ifReq.ifr_name, iapName.toUtf8().data());

     if(setdefaultif(&ifReq) == 0) {
         // OK
         error = 0;
         return true;
     } else {
         error = errno;
         return false;
     }

 }
 static bool qt_SetDefaultSnapId(const int snapId, int &error) {
     struct ifreq ifReq;
     // clear structure
     memset(&ifReq, 0, sizeof(struct ifreq));
     // set SNAP ID value
     ifReq.ifr_ifru.snap_id = snapId;

     if(setdefaultif(&ifReq) == 0) {
         // OK
         error = 0;
         return true;
     } else {
         error = errno;
         return false;
     }

 }

 static void qt_SaveIapName(QSettings& settings, QStringList& iapNames, QString& iapNameValue) {
     if(iapNames.contains(iapNameValue) && iapNames.first() == iapNameValue) {
         // no need to update
     } else {
         if(iapNameValue != QString("Easy WLAN")) {
             // new selection alway on top
             iapNames.removeAll(iapNameValue);
             iapNames.prepend(iapNameValue);
             writeIapNamesSettings(settings, iapNames);
         } else {
             // Unbeliveable ... if IAP dodn't exist before
             // no matter what you choose from IAP selection list
             // you will get "Easy WLAN" as IAP name value

             // somehow commsdb is not in sync
         }
     }
 }

 static QString qt_OfferIapDialog() {
     TBuf8<256> iapName;

     RSocketServ socketServ;
     CleanupClosePushL(socketServ);

     RConnection connection;
     CleanupClosePushL(connection);

     socketServ.Connect();
     connection.Open(socketServ);
     connection.Start();

     connection.GetDesSetting(TPtrC(KIapNameSetting), iapName);

     //connection.Stop();

     iapName.ZeroTerminate();
     QString strIapName((char*)iapName.Ptr());

     int error = 0;
     if(!qt_SetDefaultIapName(strIapName, error)) {
         //printf("failed setdefaultif @ %i with %s and errno = %d \n", __LINE__, strIapName.toUtf8().data(), error);
         strIapName = QString("");
     }

     CleanupStack::PopAndDestroy(&connection);
     CleanupStack::PopAndDestroy(&socketServ);

     return strIapName;
 }

 static QString qt_CheckForActiveConnection() {
     TUint count;

     RSocketServ serv;
     CleanupClosePushL(serv);

     RConnection conn;
     CleanupClosePushL(conn);

     serv.Connect();
     conn.Open(serv);

     TConnectionInfoBuf connInfo;

     TBuf8<256> iapName;
     TBuf8<256> iapServiceType;

     QString strIapName;

     if (conn.EnumerateConnections(count) == KErrNone) {
         if(count > 0) {
             for (TUint i = 1; i <= count; i++) {
                 if (conn.GetConnectionInfo(i, connInfo) == KErrNone) {
                     RConnection tempConn;
                     CleanupClosePushL(tempConn);
                     tempConn.Open(serv);
                     if (tempConn.Attach(connInfo, RConnection::EAttachTypeNormal) == KErrNone) {
                        tempConn.GetDesSetting(TPtrC(KIapNameSetting), iapName);
                        tempConn.GetDesSetting(TPtrC(KIapServiceType), iapServiceType);
                        //tempConn.Stop();
                        iapName.ZeroTerminate();
                                iapServiceType.ZeroTerminate();

 //                        if(iapServiceType.Find(_L8("LANService")) != KErrNotFound) {
 //                            activeLanConnectionFound = ETrue;
 //                            break;
 //                        }
                                     strIapName = QString((char*)iapName.Ptr());
                         int error = 0;
                         if(!qt_SetDefaultIapName(strIapName, error)) {
                             //printf("failed setdefaultif @ %i with %s and errno = %d \n", __LINE__, strIapName.toUtf8().data(), error);
                             strIapName = QString("");
                         }

                         CleanupStack::PopAndDestroy(&tempConn);
                         break;
                     }
                 }
             }
         }
     }

     //conn.Stop();

     CleanupStack::PopAndDestroy(&conn);
     CleanupStack::PopAndDestroy(&serv);

     return strIapName;
 }

 static QString qt_CheckSettingsForConnection(QStringList& iapNames) {
     QString strIapName;
     for(int index = 0; index < iapNames.size(); ++index) {
         strIapName = iapNames.at(index);
         int error = 0;
         if(!qt_SetDefaultIapName(strIapName, error)) {
             //printf("failed setdefaultif @ %i with %s and errno = %d \n", __LINE__, strIapName.toUtf8().data(), error);
             strIapName = QString("");
         } else {
             return strIapName;
         }
     }
     return strIapName;
 }

 static void qt_SetDefaultIapL()
 {
     // settings @ /c/data/.config/Trolltech.com
     QSettings settings(QSettings::UserScope, qtOrganizationTag);
     // populate iap name list
     QStringList iapNames;
     readIapNamesSettings(settings, iapNames);

     QString iapNameValue;

     iapNameValue = qt_CheckForActiveConnection();

     if(!iapNameValue.isEmpty()) {
         qt_SaveIapName(settings, iapNames, iapNameValue);
         return;
     }

     iapNameValue = qt_CheckSettingsForConnection(iapNames);

     if(!iapNameValue.isEmpty()) {
         qt_SaveIapName(settings, iapNames, iapNameValue);
         return;
     }

     /*
      * no active LAN connections yet
      * no IAP in settings
      * offer IAP dialog to user
      */
     iapNameValue = qt_OfferIapDialog();
     qt_SaveIapName(settings, iapNames, iapNameValue);
     return;

 }

 static int qt_SetDefaultIap()
 {
 #ifndef __WINS__
     TRAPD(err1, qt_SetDefaultIapL());
 //    TRAPD(err2, qt_InterfaceInfoL());
 //    TRAPD(err3, qt_RouteInfoL());
     return err1;
 #else
     return 0; // IAP dialog not required for emulator
 #endif
 }

 #endif // QSYM_IAP_UTIL_H