bcreate.c

ezmon, VC程序

// #define DRIVER
//
// Include files needed for WDM driver support
//
#include <wdm.h>
#include "stdarg.h"
#include "stdio.h"

//
// Include files needed for USB support
//
#include "usbdi.h"
#include "usbdlib.h"

//
// Include file for the Ezusb Device
//
#include "ezusbsys.h"

NTSTATUS a_Create(
    IN PDEVICE_OBJECT fdo,
    IN PIRP Irp
    )
/*++
Routine Description:
     This is the Entry point for CreateFile calls from user mode apps (apps may open "\\.\Ezusb-x\yyzz"
     where yy is the interface number and zz is the endpoint address).

     Here is where you would add code to create symbolic links between endpoints
     (i.e., pipes in USB software terminology) and User Mode file names.  You are
     free to use any convention you wish to create these links, although the above
     convention offers a way to identify resources on a device by familiar file and
     directory structure nomenclature.

Arguments:
    fdo - pointer to the device object for this instance of the Ezusb device

Return Value:
    NT status code
--*/
{
   NTSTATUS ntStatus;
   PDEVICE_EXTENSION pdx = (PDEVICE_EXTENSION )fdo->DeviceExtension;

   Ezusb_KdPrint(("Enter Ezusb_Create()\n"));

   if (!pdx->Started)
   {
      return STATUS_UNSUCCESSFUL;
   }

   // increment the open handle counter
   pdx->OpenHandles++;

   Irp->IoStatus.Status = STATUS_SUCCESS;
   Irp->IoStatus.Information = 0;

   // Create all the symbolic links here
   ntStatus = Irp->IoStatus.Status;

   IoCompleteRequest (Irp,
                    IO_NO_INCREMENT
                    );

   return ntStatus;

}//Ezusb_Create


NTSTATUS b_Close(
    IN PDEVICE_OBJECT fdo,
    IN PIRP Irp
    )
/*++
Routine Description:
    Entry point for CloseHandle calls from user mode apps to close handles they have opened

Arguments:
    fdo - pointer to the device object for this instance of the Ezusb device
    Irp          - pointer to an irp

Return Value:
    NT status code

--*/
{
   NTSTATUS ntStatus;
   PDEVICE_EXTENSION pdx = (PDEVICE_EXTENSION )fdo->DeviceExtension;

   Ezusb_KdPrint(("Enter Ezusb_Close()\n"));

   // decrement the open handle counter
   pdx->OpenHandles--;

   Irp->IoStatus.Status = STATUS_SUCCESS;
   Irp->IoStatus.Information = 0;

   ntStatus = Irp->IoStatus.Status;

   IoCompleteRequest (Irp,
                    IO_NO_INCREMENT
                    );

   return ntStatus;

}//Ezusb_Close