Windows驱动开发——WDM驱动

1、WDM.h

/************************************************************************
* 文件名称:HelloWDM.h                                                 
* 作    者:张帆
* 完成日期:2007-11-1
*************************************************************************/

#ifdef __cplusplus
extern "C"
{
#endif
#include <wdm.h>
#ifdef __cplusplus
}
#endif 

typedef struct _DEVICE_EXTENSION
{
    PDEVICE_OBJECT fdo;
    PDEVICE_OBJECT NextStackDevice;
	UNICODE_STRING ustrDeviceName;	// 设备名
	UNICODE_STRING ustrSymLinkName;	// 符号链接名
} DEVICE_EXTENSION, *PDEVICE_EXTENSION;

#define PAGEDCODE code_seg("PAGE")
#define LOCKEDCODE code_seg()
#define INITCODE code_seg("INIT")

#define PAGEDDATA data_seg("PAGE")
#define LOCKEDDATA data_seg()
#define INITDATA data_seg("INIT")

#define arraysize(p) (sizeof(p)/sizeof((p)[0]))

NTSTATUS HelloWDMAddDevice(IN PDRIVER_OBJECT DriverObject,
                           IN PDEVICE_OBJECT PhysicalDeviceObject);
NTSTATUS HelloWDMPnp(IN PDEVICE_OBJECT fdo,
                        IN PIRP Irp);
NTSTATUS HelloWDMDispatchRoutine(IN PDEVICE_OBJECT fdo,
								 IN PIRP Irp);
void HelloWDMUnload(IN PDRIVER_OBJECT DriverObject);

extern "C"
NTSTATUS DriverEntry(IN PDRIVER_OBJECT DriverObject,
                     IN PUNICODE_STRING RegistryPath);

2、WDM.c

/************************************************************************
* 文件名称:HelloWDM.cpp                                                 
* 作    者:张帆
* 完成日期:2007-11-1
*************************************************************************/
#include "HelloWDM.h"

/************************************************************************
* 函数名称:DriverEntry
* 功能描述:初始化驱动程序,定位和申请硬件资源,创建内核对象
* 参数列表:
      pDriverObject:从I/O管理器中传进来的驱动对象
      pRegistryPath:驱动程序在注册表的中的路径
* 返回 值:返回初始化驱动状态
*************************************************************************/
#pragma INITCODE 
extern "C" NTSTATUS DriverEntry(IN PDRIVER_OBJECT pDriverObject,
								IN PUNICODE_STRING pRegistryPath)
{
	KdPrint(("Enter DriverEntry\n"));

	pDriverObject->DriverExtension->AddDevice = HelloWDMAddDevice;
	pDriverObject->MajorFunction[IRP_MJ_PNP] = HelloWDMPnp;
	pDriverObject->MajorFunction[IRP_MJ_DEVICE_CONTROL] = 
	pDriverObject->MajorFunction[IRP_MJ_CREATE] = 
	pDriverObject->MajorFunction[IRP_MJ_READ] = 
	pDriverObject->MajorFunction[IRP_MJ_WRITE] = HelloWDMDispatchRoutine;
	pDriverObject->DriverUnload = HelloWDMUnload;

	KdPrint(("Leave DriverEntry\n"));
	return STATUS_SUCCESS;
}

/************************************************************************
* 函数名称:HelloWDMAddDevice
* 功能描述:添加新设备
* 参数列表:
      DriverObject:从I/O管理器中传进来的驱动对象
      PhysicalDeviceObject:从I/O管理器中传进来的物理设备对象
* 返回 值:返回添加新设备状态
*************************************************************************/
#pragma PAGEDCODE
NTSTATUS HelloWDMAddDevice(IN PDRIVER_OBJECT DriverObject,
                           IN PDEVICE_OBJECT PhysicalDeviceObject)
{ 
	PAGED_CODE();
	KdPrint(("Enter HelloWDMAddDevice\n"));

	NTSTATUS status;
	PDEVICE_OBJECT fdo;
	UNICODE_STRING devName;
	RtlInitUnicodeString(&devName,L"\\Device\\MyWDMDevice");
	status = IoCreateDevice(
		DriverObject,
		sizeof(DEVICE_EXTENSION),
		&(UNICODE_STRING)devName,
		FILE_DEVICE_UNKNOWN,
		0,
		FALSE,
		&fdo);
	if( !NT_SUCCESS(status))
		return status;
	PDEVICE_EXTENSION pdx = (PDEVICE_EXTENSION)fdo->DeviceExtension;
	pdx->fdo = fdo;
	pdx->NextStackDevice = IoAttachDeviceToDeviceStack(fdo, PhysicalDeviceObject);
	UNICODE_STRING symLinkName;
	RtlInitUnicodeString(&symLinkName,L"\\DosDevices\\HelloWDM");

	pdx->ustrDeviceName = devName;
	pdx->ustrSymLinkName = symLinkName;
	status = IoCreateSymbolicLink(&(UNICODE_STRING)symLinkName,&(UNICODE_STRING)devName);

	if( !NT_SUCCESS(status))
	{
		IoDeleteSymbolicLink(&pdx->ustrSymLinkName);
		status = IoCreateSymbolicLink(&symLinkName,&devName);
		if( !NT_SUCCESS(status))
		{
			return status;
		}
	}

	fdo->Flags |= DO_BUFFERED_IO | DO_POWER_PAGABLE; //驱动创建的设备有三种工作方式,缓冲区方式、直接方式和其他方式。
	fdo->Flags &= ~DO_DEVICE_INITIALIZING;

	KdPrint(("Leave HelloWDMAddDevice\n"));
	return STATUS_SUCCESS;
}

/************************************************************************
* 函数名称:DefaultPnpHandler
* 功能描述:对PNP IRP进行缺省处理
* 参数列表:
      pdx:设备对象的扩展
      Irp:从IO请求包
* 返回 值:返回状态
*************************************************************************/ 
#pragma PAGEDCODE
NTSTATUS DefaultPnpHandler(PDEVICE_EXTENSION pdx, PIRP Irp)
{
	PAGED_CODE();
	KdPrint(("Enter DefaultPnpHandler\n"));
	IoSkipCurrentIrpStackLocation(Irp);
	KdPrint(("Leave DefaultPnpHandler\n"));
	return IoCallDriver(pdx->NextStackDevice, Irp);
}

/************************************************************************
* 函数名称:HandleRemoveDevice
* 功能描述:对IRP_MN_REMOVE_DEVICE IRP进行处理
* 参数列表:
      fdo:功能设备对象
      Irp:从IO请求包
* 返回 值:返回状态
*************************************************************************/
#pragma PAGEDCODE
NTSTATUS HandleRemoveDevice(PDEVICE_EXTENSION pdx, PIRP Irp)
{
	PAGED_CODE();
	KdPrint(("Enter HandleRemoveDevice\n"));

	Irp->IoStatus.Status = STATUS_SUCCESS;
	NTSTATUS status = DefaultPnpHandler(pdx, Irp);
	IoDeleteSymbolicLink(&(UNICODE_STRING)pdx->ustrSymLinkName);

    //调用IoDetachDevice()把fdo从设备栈中脱开:
    if (pdx->NextStackDevice)
        IoDetachDevice(pdx->NextStackDevice);
	
    //删除fdo:
    IoDeleteDevice(pdx->fdo);
	KdPrint(("Leave HandleRemoveDevice\n"));
	return status;
}

/************************************************************************
* 函数名称:HelloWDMPnp
* 功能描述:对即插即用IRP进行处理
* 参数列表:
      fdo:功能设备对象
      Irp:从IO请求包
* 返回 值:返回状态
*************************************************************************/
#pragma PAGEDCODE
NTSTATUS HelloWDMPnp(IN PDEVICE_OBJECT fdo,
                        IN PIRP Irp)
{
	PAGED_CODE();

	KdPrint(("Enter HelloWDMPnp\n"));
	NTSTATUS status = STATUS_SUCCESS;
	PDEVICE_EXTENSION pdx = (PDEVICE_EXTENSION) fdo->DeviceExtension;
	PIO_STACK_LOCATION stack = IoGetCurrentIrpStackLocation(Irp);
	static NTSTATUS (*fcntab[])(PDEVICE_EXTENSION pdx, PIRP Irp) = 
	{
		DefaultPnpHandler,		// IRP_MN_START_DEVICE
		DefaultPnpHandler,		// IRP_MN_QUERY_REMOVE_DEVICE
		HandleRemoveDevice,		// IRP_MN_REMOVE_DEVICE
		DefaultPnpHandler,		// IRP_MN_CANCEL_REMOVE_DEVICE
		DefaultPnpHandler,		// IRP_MN_STOP_DEVICE
		DefaultPnpHandler,		// IRP_MN_QUERY_STOP_DEVICE
		DefaultPnpHandler,		// IRP_MN_CANCEL_STOP_DEVICE
		DefaultPnpHandler,		// IRP_MN_QUERY_DEVICE_RELATIONS
		DefaultPnpHandler,		// IRP_MN_QUERY_INTERFACE
		DefaultPnpHandler,		// IRP_MN_QUERY_CAPABILITIES
		DefaultPnpHandler,		// IRP_MN_QUERY_RESOURCES
		DefaultPnpHandler,		// IRP_MN_QUERY_RESOURCE_REQUIREMENTS
		DefaultPnpHandler,		// IRP_MN_QUERY_DEVICE_TEXT
		DefaultPnpHandler,		// IRP_MN_FILTER_RESOURCE_REQUIREMENTS
		DefaultPnpHandler,		// 
		DefaultPnpHandler,		// IRP_MN_READ_CONFIG
		DefaultPnpHandler,		// IRP_MN_WRITE_CONFIG
		DefaultPnpHandler,		// IRP_MN_EJECT
		DefaultPnpHandler,		// IRP_MN_SET_LOCK
		DefaultPnpHandler,		// IRP_MN_QUERY_ID
		DefaultPnpHandler,		// IRP_MN_QUERY_PNP_DEVICE_STATE
		DefaultPnpHandler,		// IRP_MN_QUERY_BUS_INFORMATION
		DefaultPnpHandler,		// IRP_MN_DEVICE_USAGE_NOTIFICATION
		DefaultPnpHandler,		// IRP_MN_SURPRISE_REMOVAL
	};

	ULONG fcn = stack->MinorFunction;
	if (fcn >= arraysize(fcntab))
	{						// unknown function
		status = DefaultPnpHandler(pdx, Irp); // some function we don't know about
		return status;
	}						// unknown function

#if DBG
	static char* fcnname[] = 
	{
		"IRP_MN_START_DEVICE",
		"IRP_MN_QUERY_REMOVE_DEVICE",
		"IRP_MN_REMOVE_DEVICE",
		"IRP_MN_CANCEL_REMOVE_DEVICE",
		"IRP_MN_STOP_DEVICE",
		"IRP_MN_QUERY_STOP_DEVICE",
		"IRP_MN_CANCEL_STOP_DEVICE",
		"IRP_MN_QUERY_DEVICE_RELATIONS",
		"IRP_MN_QUERY_INTERFACE",
		"IRP_MN_QUERY_CAPABILITIES",
		"IRP_MN_QUERY_RESOURCES",
		"IRP_MN_QUERY_RESOURCE_REQUIREMENTS",
		"IRP_MN_QUERY_DEVICE_TEXT",
		"IRP_MN_FILTER_RESOURCE_REQUIREMENTS",
		"",
		"IRP_MN_READ_CONFIG",
		"IRP_MN_WRITE_CONFIG",
		"IRP_MN_EJECT",
		"IRP_MN_SET_LOCK",
		"IRP_MN_QUERY_ID",
		"IRP_MN_QUERY_PNP_DEVICE_STATE",
		"IRP_MN_QUERY_BUS_INFORMATION",
		"IRP_MN_DEVICE_USAGE_NOTIFICATION",
		"IRP_MN_SURPRISE_REMOVAL",
	};

	KdPrint(("PNP Request (%s)\n", fcnname[fcn]));
#endif // DBG

	status = (*fcntab[fcn])(pdx, Irp);
	KdPrint(("Leave HelloWDMPnp\n"));
	return status;
}

/************************************************************************
* 函数名称:HelloWDMDispatchRoutine
* 功能描述:对缺省IRP进行处理
* 参数列表:
      fdo:功能设备对象
      Irp:从IO请求包
* 返回 值:返回状态
*************************************************************************/
#pragma PAGEDCODE
NTSTATUS HelloWDMDispatchRoutine(IN PDEVICE_OBJECT fdo,
								 IN PIRP Irp)
{
	PAGED_CODE();
	KdPrint(("Enter HelloWDMDispatchRoutine\n"));

	PIO_STACK_LOCATION stack = IoGetCurrentIrpStackLocation(Irp);  
    //打印IRP的major function code和minor function code。  
    ULONG code = stack->Parameters.DeviceIoControl.IoControlCode;  
    KdPrint(("DispatchRoutine, Major function code: %x, Minor function code: %x, control code: %x\n",   
        stack->MajorFunction, stack->MinorFunction, code)); 

	Irp->IoStatus.Status = STATUS_SUCCESS;
	Irp->IoStatus.Information = 0;	// no bytes xfered
	IoCompleteRequest( Irp, IO_NO_INCREMENT );

	KdPrint(("Leave HelloWDMDispatchRoutine\n"));
	return STATUS_SUCCESS;
}

/************************************************************************
* 函数名称:HelloWDMUnload
* 功能描述:负责驱动程序的卸载操作
* 参数列表:
      DriverObject:驱动对象
* 返回 值:返回状态
*************************************************************************/
#pragma PAGEDCODE
void HelloWDMUnload(IN PDRIVER_OBJECT DriverObject)
{
	PAGED_CODE();
	KdPrint(("Enter HelloWDMUnload\n"));
	KdPrint(("Leave HelloWDMUnload\n"));
}



3、INF文件见张帆WDM例子。


4、用户态应用程序

#include "CC_Debug.h"
#include <stdio.h>  
#include <windows.h>  

#define DEVICE_NAME L"\\\\.\\HelloWDM"  

int main()  
{  
 
	HANDLE hDevice = CreateFile(DEVICE_NAME,GENERIC_READ | GENERIC_WRITE,0,NULL,OPEN_EXISTING,FILE_ATTRIBUTE_NORMAL,NULL);  

	printf("hDevice = %x",hDevice);

	if (hDevice != INVALID_HANDLE_VALUE)  
	{  
		for(int i = 0; i < 10; i++)  
		{  
			DWORD RetBytes = 0;  
			BOOL b = DeviceIoControl(hDevice, 0xAB, NULL, 0, NULL, 0, &RetBytes, NULL);  
			printf("Test number %d, DeviceIoControl result: %d, byte: %d\n", i + 1, b, RetBytes);  

			Sleep(1000);  
		}  

		CloseHandle(hDevice);  
	}  
	else  
		printf("CreateFile failed, err: %x\n", GetLastError()); 

	return 0;  
}  

5、这里有必要讲一下驱动的几个名字概念:

1. 首先是设备名称,就是IoCreateDevice里面用到的那个名字。这个名字只能被内核模式的程序(如其他驱动)所识别。用户模式的程序是不知道这个名字的。

2. 符号链接,驱动程序里面可以为某个设备设置符号链接,以\??\开头(或者\DosDevices\),这样用户模式的程序就可以通过这个符号链接来访问这个设备。

3. 用户模式程序里面的设备名称,以\\.\开头
比如这个例子里面内核模式的设备名称是"\Device\MyWDMDevice",符号链接是"\DosDevices\HelloWDM",然后用户模式程序通过"\\.\HelloWDM"访问这个设备。

当CreateFile成功打开这个设备后,就可以操作这个设备了。测试例子里面简单往这个设备调用了10次DeviceIoControl函数(也就是发送一个IRP_MJ_DEVICE_CONTROL类型的IRP)。

4、Major function code 是e(16进制),看一下WDM.H

确实0x0e对应的是IRP_MJ_DEVICE_CONTROL。

然后测试例子里面发送了一个0xAB的控制码给驱动,那么驱动里面通过stack->Parameters.DeviceIoControl.IoControlCode得到的控制码也是0xab,看上面的debugview信息。


http://blog.csdn.net/zj510/article/details/8208732

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