Implementing RNDIS Network Connection Refusal Notifier Plug-in

The RNDIS Network Connection Refusal Notifier informs the user when an attempt to use RNDIS has been blocked because the Bluetooth PAN is active.

const TUid KUidRndisNetworkConnectionRefusalNotifier = {0x10286A45};

1. Your new class CRndisNetworkConnectionRefusalNotifier must implement the MEikSrvNotifierBase2 interface.
2. 
   Implement the Start() function to start the notifier. This is called as a result of a client-side call to RNotifier::StartNotifier(), which the client uses to start a notifier from which it does not expect a response. The function is synchronous, but it should be implemented so that it completes as soon as possible, allowing the notifier framework to enforce its priority mechanism. It is not possible to wait for a notifier to complete before returning from this function unless the notifier is likely to finish implementing its functionality immediately.

   Parameter	Description
   aBuffer	Data that can be passed from the client-side. The format and meaning of any data is implementation dependent.

   In this example from the reference code, specific details are given for a refusal resulting from BT Pan being active and a default message is given for other reasons.

   TPtrC8 CRndisNetworkConnectionRefusalNotifier::StartL(const TDesC8& aBuffer)
       {
       //Get the refusal reason from aBuffer
       TPckgBuf<TRndisRefusalNotifierReasonCode> pkgbuf;
       pkgbuf.Copy(aBuffer);
       TRndisRefusalNotifierReasonCode reason = pkgbuf();
   
       //Get the label control 
       CEikLabel* label = static_cast<CEikLabel*>(Control(ERefusalLabel));
   
       switch(reason)
       {
       case ERndisRefusalNotifierBTPanIsActive:
           {
           //Notify that BT Pan is active, rndis is refused.
           label->SetTextL(KBTPanIsActive);
           break;
           }
       default:
           //Set error message
           label->SetTextL(KUnknownMessage);
           break;
       }
    
       //Update the control.
       label->DrawNow();
       label->MakeVisible(ETrue);
   
       //Show dialog.
       if (!IsVisible())
           {
           RouseSleepingDialog();
           }
   
       return aBuffer;
       }