miniport.c

用Delphi实现的防火墙,可实现象天网一样的功能.

Return Value:

	Return code from the NdisRequest below.

--*/
{
	PADAPT	pAdapt = (PADAPT)MiniportAdapterContext;
	NDIS_STATUS	Status = NDIS_STATUS_FAILURE;

	do
	{
		//
		// Return Success for this OID
		//
		if (Oid == OID_PNP_QUERY_POWER)
		{
			Status=NDIS_STATUS_SUCCESS;
			break;
		}

		//
		// All other queries are failed, if the miniport is not at D0
		//
		if (pAdapt->MPDeviceState > NdisDeviceStateD0 || pAdapt->StandingBy == TRUE)
		{
			Status = NDIS_STATUS_FAILURE;
			break;
		}
		//
		//	We are doing all sends on the secondary, so send all requests with Send OIDs to the Secondary
		//
		if (MPIsSendOID(Oid))
		{
			pAdapt = pAdapt->pSecondaryAdapt;
			//
			// Will point to itself, if there is no secondary (see initialization)
			//
		}

		pAdapt->Request.RequestType = NdisRequestQueryInformation;
		pAdapt->Request.DATA.QUERY_INFORMATION.Oid = Oid;
		pAdapt->Request.DATA.QUERY_INFORMATION.InformationBuffer = InformationBuffer;
		pAdapt->Request.DATA.QUERY_INFORMATION.InformationBufferLength = InformationBufferLength;
		pAdapt->BytesNeeded = BytesNeeded;
		pAdapt->BytesReadOrWritten = BytesWritten;
		pAdapt->OutstandingRequests = TRUE;

		//
		// if the Protocol device state is OFF, then the IM driver cannot send the request below and must pend it
		//
		if (pAdapt->PTDeviceState > NdisDeviceStateD0)
		{
			pAdapt->QueuedRequest = TRUE;
			Status = NDIS_STATUS_PENDING;
			break;
		}

		//
		// default case, most requests will be passed to the miniport below
		//
		NdisRequest(&Status,
					pAdapt->BindingHandle,
					&pAdapt->Request);


		//
		// If the Query was a success, pass the results back to the entity that made the request
		//
		if (Status == NDIS_STATUS_SUCCESS)
		{
			*BytesWritten = pAdapt->Request.DATA.QUERY_INFORMATION.BytesWritten;
			*BytesNeeded = pAdapt->Request.DATA.QUERY_INFORMATION.BytesNeeded;
		}

		//
		// Fill the buffer with the required values if Oid == OID_PNP_CAPABILITIES
		// and the query was successful
		//
		if (Oid  == OID_PNP_CAPABILITIES  && Status == NDIS_STATUS_SUCCESS)
		{
			MPQueryPNPCapbilities(pAdapt,&Status);
		}

		if (Status != NDIS_STATUS_PENDING)
		{
			pAdapt->OutstandingRequests = FALSE;
		}

	} while (FALSE);

	return(Status);

}


VOID
MPQueryPNPCapbilities(
	IN OUT	PADAPT			pAdapt,
	OUT		PNDIS_STATUS	pStatus
	)
/*++

Routine Description:

	Miniport QueryInfo OID_PNP_CAPAIBILITIES:
	If the Oid == Oid_PNP_CAPABILITIES, InformationBuffer is returned with all the fields
	assigned NdisDeviceStateUnspecified in the NDIS_PM_WAKE_UP_CAPABILITIES structure

	OID_QUERY_POWER_STATE is returned with NDIS_STATUS_SUCCESS and should never be passed below.

Arguments:

	MiniportAdapterContext	Pointer to the adapter structure
	Oid						Oid for this query
	InformationBuffer		Buffer for information
	InformationBufferLength	Size of this buffer
	BytesWritten			Specifies how much info is written
	BytesNeeded				In case the buffer is smaller than what we need, tell them how much is needed

Return Value:

	Return code from the NdisRequest below.

--*/

{
	PNDIS_PNP_CAPABILITIES			pPNPCapabilities;
	PNDIS_PM_WAKE_UP_CAPABILITIES	pPMstruct;

	if (pAdapt->Request.DATA.QUERY_INFORMATION.InformationBufferLength >= sizeof(NDIS_PNP_CAPABILITIES))
	{
		pPNPCapabilities = (PNDIS_PNP_CAPABILITIES)(pAdapt->Request.DATA.QUERY_INFORMATION.InformationBuffer);

		//
		// Setting up the buffer to be returned to the Protocol above the Passthru miniport
		//
		pPMstruct= & pPNPCapabilities->WakeUpCapabilities;
		pPMstruct->MinMagicPacketWakeUp = NdisDeviceStateUnspecified;
		pPMstruct->MinPatternWakeUp = NdisDeviceStateUnspecified;
		pPMstruct->MinLinkChangeWakeUp = NdisDeviceStateUnspecified;
		*pAdapt->BytesReadOrWritten = sizeof(NDIS_PNP_CAPABILITIES);
		*pAdapt->BytesNeeded = 0;


		//
		// Setting our internal flags
		// Default, device is ON
		//
		pAdapt->MPDeviceState = NdisDeviceStateD0;
		pAdapt->PTDeviceState = NdisDeviceStateD0;

		*pStatus = NDIS_STATUS_SUCCESS;
	}
	else
	{
		*pAdapt->BytesNeeded= sizeof(NDIS_PNP_CAPABILITIES);
		*pStatus = NDIS_STATUS_RESOURCES;
	}
}


NDIS_STATUS
MPSetInformation(
	IN	NDIS_HANDLE				MiniportAdapterContext,
	IN	NDIS_OID				Oid,
	IN	PVOID					InformationBuffer,
	IN	ULONG					InformationBufferLength,
	OUT PULONG					BytesRead,
	OUT PULONG					BytesNeeded
	)
/*++

Routine Description:

	Miniport SetInfo handler.

	In the case of OID_PNP_SET_POWER, record the power state and return the OID.	
	Do not pass below
	If the device is suspended, do not block the SET_POWER_OID 
	as it is used to reactivate the Passthru miniport

	
	PM- If the MP is not ON (DeviceState > D0) return immediately  (except for 'query power' and 'set power')
         If MP is ON, but the PT is not at D0, then queue the queue the request for later processing

	Requests to miniports are always serialized


Arguments:

	MiniportAdapterContext	Pointer to the adapter structure
	Oid						Oid for this query
	InformationBuffer		Buffer for information
	InformationBufferLength	Size of this buffer
	BytesRead				Specifies how much info is read
	BytesNeeded				In case the buffer is smaller than what we need, tell them how much is needed

Return Value:

	Return code from the NdisRequest below.

--*/
{
	PADAPT		pAdapt = (PADAPT)MiniportAdapterContext;
	NDIS_STATUS	Status;

	Status = NDIS_STATUS_FAILURE;

	do
	{
		//
		// The Set Power should not be sent to the miniport below the Passthru, but is handled internally
		//
		if (Oid == OID_PNP_SET_POWER)
		{
			MPProcessSetPowerOid( &Status, 
			                       pAdapt, 
			                       InformationBuffer, 
			                       InformationBufferLength, 
			                       BytesRead, 
			                       BytesNeeded);
			break;

		}

		//
		// All other Set Information requests are failed, if the miniport is not at D0 or is transitioning to
		// a device state greater than D0
		//
		if (pAdapt->MPDeviceState > NdisDeviceStateD0 || pAdapt->StandingBy == TRUE)
		{
			Status = NDIS_STATUS_FAILURE;
			break;
		}


		// Set up the Request and return the result
		pAdapt->Request.RequestType = NdisRequestSetInformation;
		pAdapt->Request.DATA.SET_INFORMATION.Oid = Oid;
		pAdapt->Request.DATA.SET_INFORMATION.InformationBuffer = InformationBuffer;
		pAdapt->Request.DATA.SET_INFORMATION.InformationBufferLength = InformationBufferLength;
		pAdapt->BytesNeeded = BytesNeeded;
		pAdapt->BytesReadOrWritten = BytesRead;
		pAdapt->OutstandingRequests = TRUE;


		//
		// if the Protocol device state is OFF, then the IM driver cannot send the request below and must pend it
		//
		if ( pAdapt->PTDeviceState > NdisDeviceStateD0)
		{
			pAdapt->QueuedRequest = TRUE;
			Status = NDIS_STATUS_PENDING;
			break;
		}

		NdisRequest(&Status,
					pAdapt->BindingHandle,
					&pAdapt->Request);


		if (Status == NDIS_STATUS_SUCCESS)
		{
			*BytesRead = pAdapt->Request.DATA.SET_INFORMATION.BytesRead;
			*BytesNeeded = pAdapt->Request.DATA.SET_INFORMATION.BytesNeeded;
		}


		if (Status != NDIS_STATUS_PENDING)
		{
			pAdapt->OutstandingRequests = FALSE;
		}

	} while (FALSE);

	return(Status);
}


VOID
MPProcessSetPowerOid(
	IN OUT PNDIS_STATUS      pNdisStatus,
	IN  PADAPT					pAdapt,
	IN	PVOID					InformationBuffer,
	IN	ULONG					InformationBufferLength,
	OUT PULONG					BytesRead,
	OUT PULONG					BytesNeeded
    )
/*++

Routine Description:
	This routine does all the procssing for a request with a SetPower Oid
    The SampleIM miniport shoud accept  the Set Power and transition to the new state

    The Set Power should not be passed to the miniport below

    If the IM miniport is going into a low power state, then there is no guarantee if it will ever
    be asked go back to D0, before getting halted. No requests should be pended or queued.

	
Arguments:
	IN OUT PNDIS_STATUS      *pNdisStatus - Status of the operation
	IN  PADAPT					pAdapt,   - The Adapter structure
	IN	PVOID					InformationBuffer, - The New DeviceState
	IN	ULONG					InformationBufferLength,
	OUT PULONG					BytesRead, - No of bytes read
	OUT PULONG					BytesNeeded -  No of bytes needed


Return Value:
    Status  - NDIS_STATUS_SUCCESS if all the wait events succeed.
    

--*/

{

	
	NDIS_DEVICE_POWER_STATE NewDeviceState;

	DBGPRINT ("==>MPProcessSetPowerOid"); 
	ASSERT (InformationBuffer != NULL);

	NewDeviceState = (*(PNDIS_DEVICE_POWER_STATE)InformationBuffer);

	*pNdisStatus = NDIS_STATUS_FAILURE;

	do 
	{
		//
		// Check for invalid length
		//
		if (InformationBufferLength < sizeof(NDIS_DEVICE_POWER_STATE))
		{
			*pNdisStatus = NDIS_STATUS_INVALID_LENGTH;
			break;
		}

		//
		// Check for invalid device state
		//
		if ((pAdapt->MPDeviceState > NdisDeviceStateD0) && (NewDeviceState != NdisDeviceStateD0))
		{
			//
			// If the miniport is in a non-D0 state, the miniport can only receive a Set Power to D0
			//
			ASSERT (!(pAdapt->MPDeviceState > NdisDeviceStateD0) && (NewDeviceState != NdisDeviceStateD0));

			*pNdisStatus = NDIS_STATUS_FAILURE;
			break;
		}	

		//
		// Is the miniport transitioning from an On (D0) state to an Low Power State (>D0)
		// If so, then set the StandingBy Flag - (Block all incoming requests)
		//
		if (pAdapt->MPDeviceState == NdisDeviceStateD0 && NewDeviceState > NdisDeviceStateD0)
		{
			pAdapt->StandingBy = TRUE;
		}

		//
		// If the miniport is transitioning from a low power state to ON (D0), then clear the StandingBy flag
		// All incoming requests will be pended until the physical miniport turns ON.
		//
		if (pAdapt->MPDeviceState > NdisDeviceStateD0 &&  NewDeviceState == NdisDeviceStateD0)
		{
			pAdapt->StandingBy = FALSE;
		}
		
		//
		// Now update the state in the pAdapt structure;
		//
		pAdapt->MPDeviceState = NewDeviceState;
		
		*pNdisStatus = NDIS_STATUS_SUCCESS;
	

	} while (FALSE);	
		
	if (*pNdisStatus == NDIS_STATUS_SUCCESS)
	{
		*BytesRead = sizeof(NDIS_DEVICE_POWER_STATE);
		*BytesNeeded = 0;
	}
	else
	{
		*BytesRead = 0;
		*BytesNeeded = sizeof (NDIS_DEVICE_POWER_STATE);
	}

	DBGPRINT ("<==MPProcessSetPowerOid"); 
}







VOID
MPReturnPacket(
	IN	NDIS_HANDLE				MiniportAdapterContext,
	IN	PNDIS_PACKET			Packet
	)
/*++

Routine Description:


Arguments:


Return Value:


--*/
{
	PADAPT			pAdapt = (PADAPT)MiniportAdapterContext;
	PNDIS_PACKET	MyPacket;
	PRSVD			Resvd;

	Resvd = (PRSVD)(Packet->MiniportReserved);
	MyPacket = Resvd->OriginalPkt;

	NdisFreePacket(Packet);
	NdisReturnPackets(&MyPacket, 1);
}


NDIS_STATUS
MPTransferData(
	OUT PNDIS_PACKET			Packet,
	OUT PUINT					BytesTransferred,
	IN	NDIS_HANDLE				MiniportAdapterContext,
	IN	NDIS_HANDLE				MiniportReceiveContext,
	IN	UINT					ByteOffset,
	IN	UINT					BytesToTransfer
	)
/*++

Routine Description:

	Miniport's transfer data handler.

Arguments:

	Packet					Destination packet
	BytesTransferred		Place-holder for how much data was copied
	MiniportAdapterContext	Pointer to the adapter structure
	MiniportReceiveContext	Context
	ByteOffset				Offset into the packet for copying data
	BytesToTransfer			How much to copy.

Return Value:

	Status of transfer

--*/
{
	PADAPT		pAdapt = (PADAPT)MiniportAdapterContext;
	NDIS_STATUS	Status;

	//
	// Return, if the device is OFF
	//