Implementing
the Uplink Authorization Notifier Plug-in
The Uplink Authorization Notifier requests permission for an RNDIS
connection to access an external uplink.
The Uplink Authorization
Notifier requests permission for a RNDIS connection to access an external
uplink. When a RNDIS enabled mobile device connects to a PC, the notifier
is activated to get uplink authorisation.
The Uplink Authorization
Notifier is a notifier plug-in that device creators need to implement. Device
creators can implement this notifier either by providing a dialog asking the
mobile device user for permission or by providing a policy specifying when
to give permission.
If the Uplink Authorization Notifier is refused
permission, the RNDIS connection can only access services local to the phone.
The
uplink authorization notifier UID is defined in the RNDIS header file
rndisuiinterfaces.h.
const TUid KUidRndisUplinkAuthorizationNotifier = {0x10286A44};
Responses
to the request are defined in the RNDIS header file rndisuiinterfaces.h.
The plug-in will receive one of the following responses: ERndisAllowUplinkAccess or ERndisDisallowUplinkAccess as
a result of requesting permission for an RNDIS connection.
The plug-in
needs to:
- Implement
the MEikSrvNotifierBase2 interface.
Implement the StartL() function of the MEikSrvNotifierBase2 interface
to start the notifier.
The RNDIS agent calls the asynchronous function RNotifier::StartNotifierAndGetResponse(),
which starts the notifier. The RNDIS agent waits, asynchronously, for the
notifier to tell the RNDIS agent that it has finished its work. Therefore
it is important to return from this function as soon as possible.
Remember to call Complete() on the RMessage2 object
to deactivate the notifier.
The aBuffer parameter is an array with six TUint8 integers
containing the MAC address of the network interface resident on the PC.
| Parameter |
Description |
aBuffer
|
Data that is passed from the RNDIS agent. In which contains the
IAP ID used for RNDIS network interface.
|
aReplySlot
|
The offset within the message arguments for the reply. This message
argument will refer to a modifiable descriptor, a TDes8 type, into which data
can be returned.
|
aMessage
|
Encapsulates the RNDIS agent’s request.
|
virtual void StartL(const TDesC8& aBuffer, TInt aReplySlot,
const RMessagePtr2& aMessage)
{
TRndisUplinkAuthorizationResult result;
// The result below is set according to the device creator's implementation. Set
// either from mobile device, user input or a policy file.
result = ERndisAllowUplinkAccess or ERndisDisallowUplinkAccess;
TRndisUplinkAuthorizationResultPckg pckgResult = result;
TInt err = aMessage.Write(aReplySlot, pckgResult);
aMessage.Complete(err);
}