return STATUS_INVALID_PARAMETER;

    UsbBuildGetDescriptorRequest(urb,
                                 (USHORT) sizeof (struct _URB_CONTROL_DESCRIPTOR_REQUEST),
                                 USB_DEVICE_DESCRIPTOR_TYPE,    
                                 0,                             
                                 0,                             
                                 pvOutputBuffer,                
                                 NULL,                          
                                 sizeof(USB_DEVICE_DESCRIPTOR), 
                                 NULL);                         
                                                                 
    ntStatus = UsbCallUSBDI(fdo, urb);

    if (NT_SUCCESS(ntStatus)) {
		length = urb->UrbControlDescriptorRequest.TransferBufferLength;
	}
	else
		length = 0;
    ExFreePool(urb);
    return length;
}
//
ULONG UsbGetStringDescriptor(IN PDEVICE_OBJECT fdo,
                             UCHAR             Index,
                             USHORT            LanguageId,
                             PVOID             pvOutputBuffer,
                             ULONG             ulLength)
{
	NTSTATUS ntStatus = STATUS_SUCCESS;
    PURB     urb = NULL;
    ULONG    length = 0;

    urb = ExAllocatePool(NonPagedPool, 
                         sizeof(struct _URB_CONTROL_DESCRIPTOR_REQUEST));
                         
    if (urb==NULL)
		return STATUS_NO_MEMORY;        

    if (pvOutputBuffer==NULL)
		return STATUS_INVALID_PARAMETER;

    UsbBuildGetDescriptorRequest(urb,
                                 (USHORT) sizeof (struct _URB_CONTROL_DESCRIPTOR_REQUEST),
                                  USB_STRING_DESCRIPTOR_TYPE,    
                                  Index,                         
                                  LanguageId,                    
                                  pvOutputBuffer,                
                                  NULL,                          
                                  ulLength,                      
                                  NULL);                         
                                                                  
    ntStatus = UsbCallUSBDI(fdo, urb);

    if (NT_SUCCESS(ntStatus))  {
         length = urb->UrbControlDescriptorRequest.TransferBufferLength;
	}
    else
         length = 0;
    ExFreePool(urb);
    return length;
}
//
ULONG UsbGetConfigDescriptor(IN PDEVICE_OBJECT fdo,
                             PVOID   pvOutputBuffer,
                             ULONG   ulLength)
{
	NTSTATUS  ntStatus = STATUS_SUCCESS;
    PURB      urb = NULL;
    ULONG     length = 0;

    urb = ExAllocatePool(NonPagedPool, 
                         sizeof(struct _URB_CONTROL_DESCRIPTOR_REQUEST));
                         
    if (urb==NULL)
		return STATUS_NO_MEMORY;        
   
    if (pvOutputBuffer==NULL)
		return STATUS_INVALID_PARAMETER;

   	UsbBuildGetDescriptorRequest(urb,
                                 (USHORT) sizeof (struct _URB_CONTROL_DESCRIPTOR_REQUEST),
                                 USB_CONFIGURATION_DESCRIPTOR_TYPE, 
                                 0,                         
                                 0,                         
                                 pvOutputBuffer,            
                                 NULL,                      
                                 ulLength,                  
                                 NULL);                     
                                                                  
    ntStatus = UsbCallUSBDI(fdo, urb);

    if (NT_SUCCESS(ntStatus)) {
         length = urb->UrbControlDescriptorRequest.TransferBufferLength;
	}
    else
        length = 0;
    ExFreePool(urb);
    return length;
}
//
NTSTATUS Bulk_Read_Write(IN  PDEVICE_OBJECT fdo,IN  PIRP Irp)
{
	NTSTATUS ntStatus;
	PURB                       urb = NULL;
    ULONG                      urbSize = 0;
    ULONG                      transferFlags = 0;
    PUSBD_INTERFACE_INFORMATION interfaceInfo = NULL;
    PUSBD_PIPE_INFORMATION     pipeInfo = NULL;
    USBD_PIPE_HANDLE           pipeHandle = NULL;
	PDEVICE_EXTENSION pdx = fdo->DeviceExtension;
    PIO_STACK_LOCATION irpStack = IoGetCurrentIrpStackLocation (Irp);
    PBULK_TRANSFER_CONTROL bulkControl = (PBULK_TRANSFER_CONTROL)Irp->AssociatedIrp.SystemBuffer;
    ULONG bufferLength = irpStack->Parameters.DeviceIoControl.OutputBufferLength;
   
    interfaceInfo = pdx->Interface;
   if (!interfaceInfo)
	   return STATUS_UNSUCCESSFUL;
   
   if (bulkControl->pipeNum > interfaceInfo->NumberOfPipes)
       return STATUS_INVALID_PARAMETER;

   pipeInfo = &(interfaceInfo->Pipes[bulkControl->pipeNum]);
   if (!((pipeInfo->PipeType == UsbdPipeTypeBulk) ||
         (pipeInfo->PipeType == UsbdPipeTypeInterrupt))) 
       return STATUS_INVALID_PARAMETER;
   
   pipeHandle = pipeInfo->PipeHandle;
   if (!pipeHandle)
       return STATUS_UNSUCCESSFUL;
   
   if (bufferLength > pipeInfo->MaximumTransferSize) 
      return STATUS_INVALID_PARAMETER;

   urbSize = sizeof(struct _URB_BULK_OR_INTERRUPT_TRANSFER);
   urb = ExAllocatePool(NonPagedPool,urbSize);
   if (!urb)
	   return STATUS_NO_MEMORY;

   transferFlags = USBD_SHORT_TRANSFER_OK;
   if (USB_ENDPOINT_DIRECTION_IN(pipeInfo->EndpointAddress))
	   transferFlags |= USBD_TRANSFER_DIRECTION_IN;

   UsbBuildInterruptOrBulkTransferRequest(urb, 
                                          (USHORT) urbSize, 
					                      pipeHandle, 
							              NULL, 
							              Irp->MdlAddress, 
							              bufferLength, 
							              transferFlags,
							              NULL); 
   ntStatus = UsbCallUSBDI(fdo, urb);

   if (NT_SUCCESS(ntStatus)) 
	   Irp->IoStatus.Information = urb->UrbBulkOrInterruptTransfer.TransferBufferLength;

   ExFreePool(urb);
   return ntStatus;
}
//
ULONG UsbVendorRequest(IN PDEVICE_OBJECT fdo, IN PVENDOR_REQUEST_IN pVendorRequest)
{
    NTSTATUS  ntStatus = STATUS_SUCCESS;
    PURB      urb = NULL;
    ULONG     length = 0;
    PUCHAR    buffer = NULL;

    urb = ExAllocatePool(NonPagedPool, 
                         sizeof(struct _URB_CONTROL_VENDOR_OR_CLASS_REQUEST));
    if (urb)
    {
        RtlZeroMemory(urb,sizeof(struct  _URB_CONTROL_VENDOR_OR_CLASS_REQUEST));

        urb->UrbHeader.Length = sizeof(struct _URB_CONTROL_VENDOR_OR_CLASS_REQUEST);
        urb->UrbHeader.Function = URB_FUNCTION_VENDOR_DEVICE;
        urb->UrbControlVendorClassRequest.TransferBufferLength = pVendorRequest->wLength;
        urb->UrbControlVendorClassRequest.TransferBufferMDL = NULL;
        urb->UrbControlVendorClassRequest.Request = pVendorRequest->bRequest;
        urb->UrbControlVendorClassRequest.Value = pVendorRequest->wValue;
        urb->UrbControlVendorClassRequest.Index = pVendorRequest->wIndex;

        if (pVendorRequest->direction)
        {
            urb->UrbControlVendorClassRequest.TransferFlags |= USBD_TRANSFER_DIRECTION_IN;
            urb->UrbControlVendorClassRequest.TransferBuffer = pVendorRequest;

        }
        else
        {
            urb->UrbControlVendorClassRequest.TransferFlags = 0;
            buffer = ExAllocatePool(NonPagedPool, pVendorRequest->wLength);

            urb->UrbControlVendorClassRequest.TransferBuffer = buffer;

            if (pVendorRequest->wLength == 1)
            {
                buffer[0] = pVendorRequest->bData;
            }
            else
            {
                int i;
                PUCHAR ptr = buffer;

                for (i=0; i < pVendorRequest->wLength; i++)
                {
                    *ptr = (UCHAR) i;
                    ptr++;
                }
            }
        }

        ntStatus = UsbCallUSBDI(fdo, urb);

        if (pVendorRequest->direction)
        {
            length = urb->UrbControlVendorClassRequest.TransferBufferLength;
        }
        else
        {
            length = 0;
        }

        ExFreePool(urb);
        if (buffer) ExFreePool(buffer);
    }
    return length;
}