EXE和SYS通信(ReadFile WriteFile DO_DIRECT_IO) 直接方式

#include <stdio.h>
#include <Windows.h>

int main (void)
{
	char linkname[]="\\\\.\\HelloDDK";
	HANDLE hDevice = CreateFileA(linkname,GENERIC_READ | GENERIC_WRITE,0,NULL,OPEN_EXISTING,FILE_ATTRIBUTE_NORMAL,NULL);
	if (hDevice == INVALID_HANDLE_VALUE)
	{
		printf("Win32 error code: %d\n",GetLastError());
		return 1;
	}

	UCHAR buffer[10]={0};
	ULONG ulRead=0;
	if (ReadFile(hDevice,buffer,10,&ulRead,NULL))
	{
		printf("Read %d bytes:",ulRead);
		for (int i=0;i<(int)ulRead;i++)
		{
			printf("%02X ",buffer[i]);
		}
		printf("\n");
	}
	getchar();
	getchar();

	ulRead=0;
	if (WriteFile(hDevice,buffer,10,&ulRead,NULL))
	{
		printf("write %d bytes\n",ulRead);
		for (int i=0;i<(int)ulRead;i++)
		{
			printf("%02X ",buffer[i]);
		}
		printf("\n");
	}

	CloseHandle(hDevice);

	getchar();
	getchar();
	return 0;
}

#pragma once

#include <ntddk.h>
#define CountArray(Array)  (	sizeof(Array)	/	sizeof(Array[0])	)

typedef struct _DEVICE_EXTENSION
{
	PDEVICE_OBJECT pDevice;										//设备对象
	UNICODE_STRING ustrDeviceName;					//设备名称
	UNICODE_STRING ustrSymLinkName;					//符号名称
}DEVICE_EXTENSION,*PDEVICE_EXTENSION;

#ifdef __cplusplus
extern "C" NTSTATUS DriverEntry(IN PDRIVER_OBJECT DriverObject, IN PUNICODE_STRING  RegistryPath);
#endif

void HelloUnload(IN PDRIVER_OBJECT DriverObject);														//卸载函数
NTSTATUS CreateDevice(PDRIVER_OBJECT PDevObj);													//创建设备
NTSTATUS HelloDDKDispatchRoutine(IN PDEVICE_OBJECT pDevObj,IN PIRP pIrp);	//派遣函数
NTSTATUS HelloDDKRead(IN PDEVICE_OBJECT pDevObj,IN PIRP pIrP);						//读请求派遣函数
NTSTATUS HelloDDKWrite(IN PDEVICE_OBJECT pDevObj,IN PIRP pIrP);						//写请求派遣函数

#include "hello.h"

NTSTATUS DriverEntry(IN PDRIVER_OBJECT DriverObject, IN PUNICODE_STRING  RegistryPath)
{
		DbgPrint("Hello from!\n");
		DriverObject->DriverUnload = HelloUnload;
		for (int i=0;i<IRP_MJ_MAXIMUM_FUNCTION;i++)
		{
			DriverObject->MajorFunction[i]=HelloDDKDispatchRoutine;
		}
		DriverObject->MajorFunction[IRP_MJ_READ]=HelloDDKRead;			//设置读派遣函数
		DriverObject->MajorFunction[IRP_MJ_WRITE]=HelloDDKWrite;		//设置写派遣函数

#if DBG
		_asm int 3
#endif
		//创建设备
		CreateDevice(DriverObject);

		return STATUS_SUCCESS;
}

//读派遣函数
NTSTATUS HelloDDKRead(IN PDEVICE_OBJECT pDevObj,IN PIRP pIrP)
{
#if DBG
	_asm int 3
#endif

	NTSTATUS status=STATUS_SUCCESS;

	PIO_STACK_LOCATION stack=IoGetCurrentIrpStackLocation(pIrP);
	ULONG ulReadLength=stack->Parameters.Read.Length;

	ULONG mdl_length=MmGetMdlByteCount(pIrP->MdlAddress);					//获取缓冲区的长度
	PVOID  mdl_address=MmGetMdlVirtualAddress(pIrP->MdlAddress);		//获取缓冲区的虚拟地址
	ULONG mdl_offset=MmGetMdlByteOffset(pIrP->MdlAddress);					//返回缓冲区的偏移

	if (mdl_length!=ulReadLength)
	{
		//MDL的长度应该和读长度相等，否则该操作应该设为不成功
		pIrP->IoStatus.Information=0;
		status=STATUS_UNSUCCESSFUL;
	}
	else
	{
		//用那个MmGetSystemAddressForMdlSafe得到在内核模式下的影射
		PVOID kernel_address=MmGetSystemAddressForMdlSafe(pIrP->MdlAddress,NormalPagePriority);
		DbgPrint("address0X%08X\n",kernel_address);
		memset(kernel_address,0XAA,ulReadLength);
		pIrP->IoStatus.Information=ulReadLength;
	}

	//完成IRP
	pIrP->IoStatus.Status=status;																	//设置完成状态
	IoCompleteRequest(pIrP,IO_NO_INCREMENT);										//完成IRP

	return status;
}

//写派遣函数
NTSTATUS HelloDDKWrite(IN PDEVICE_OBJECT pDevObj,IN PIRP pIrP)
{
#if DBG
	_asm int 3
#endif

	NTSTATUS status=STATUS_SUCCESS;

	PIO_STACK_LOCATION stack=IoGetCurrentIrpStackLocation(pIrP);
	ULONG ulWriteLength=stack->Parameters.Write.Length;

	ULONG mdl_length=MmGetMdlByteCount(pIrP->MdlAddress);					//获取缓冲区的长度
	PVOID  mdl_address=MmGetMdlVirtualAddress(pIrP->MdlAddress);		//获取缓冲区的虚拟地址
	ULONG mdl_offset=MmGetMdlByteOffset(pIrP->MdlAddress);					//返回缓冲区的偏移

	if (mdl_length!=ulWriteLength)
	{
		//MDL的长度应该和读长度相等，否则该操作应该设为不成功
		pIrP->IoStatus.Information=0;
		status=STATUS_UNSUCCESSFUL;
	}
	else
	{
		//用那个MmGetSystemAddressForMdlSafe得到在内核模式下的影射
		PVOID kernel_address=MmGetSystemAddressForMdlSafe(pIrP->MdlAddress,NormalPagePriority);
		DbgPrint("address0X%08X\n",kernel_address);
		UCHAR buffer[10]={0};
		memcpy(buffer,kernel_address,ulWriteLength);
		for (int i=0;i<(int)ulWriteLength;i++)
		{
			DbgPrint("%02x\n",buffer[i]);
		}
		memset(kernel_address,0XAA,ulWriteLength);
		pIrP->IoStatus.Information=ulWriteLength;
	}

	//完成IRP
	pIrP->IoStatus.Status=status;																	//设置完成状态
	IoCompleteRequest(pIrP,IO_NO_INCREMENT);										//完成IRP

	return status;
}

//卸载函数
void HelloUnload(IN PDRIVER_OBJECT DriverObject)
{
		DbgPrint("Goodbye from!\n");
		PDEVICE_OBJECT pNextObj=NULL;
		pNextObj=DriverObject->DeviceObject;

		while (pNextObj)
		{
			PDEVICE_EXTENSION pDevExt=(PDEVICE_EXTENSION)pNextObj->DeviceExtension;
			//删除符号连接
			IoDeleteSymbolicLink(&pDevExt->ustrSymLinkName);
			//删除设备
			IoDeleteDevice(pDevExt->pDevice);

			pNextObj=pNextObj->NextDevice;
		}
}

//创建设备
NTSTATUS CreateDevice(PDRIVER_OBJECT pDriver_Object)
{
	//定义变量
	NTSTATUS status=STATUS_SUCCESS;
	PDEVICE_OBJECT pDevObje=NULL;
	PDEVICE_EXTENSION pDevExt=NULL;

	//初始化字符串
	UNICODE_STRING devname;
	UNICODE_STRING symLinkName;
	RtlInitUnicodeString(&devname,L"\\device\\hello");
	RtlInitUnicodeString(&symLinkName,L"\\??\\HelloDDK");

	//创建设备
	if (IoCreateDevice(pDriver_Object,sizeof(PDEVICE_EXTENSION),&devname,FILE_DEVICE_UNKNOWN,NULL,TRUE,&pDevObje)!=STATUS_SUCCESS )
	{
		DbgPrint("创建设备失败\n");
		return status;
	}

	//设置读写方式
	pDevObje->Flags |= DO_DIRECT_IO;				//直接读取设备
	pDevExt=(PDEVICE_EXTENSION)pDevObje->DeviceExtension;
	pDevExt->pDevice=pDevObje;
	pDevExt->ustrDeviceName=devname;
	pDevExt->ustrSymLinkName=symLinkName;

	//创建符号连接
	if (IoCreateSymbolicLink(&symLinkName,&devname)!=STATUS_SUCCESS )
	{
		DbgPrint("创建符号连接失败\n");
		IoDeleteDevice(pDevObje);
		return status;
	}
	return STATUS_SUCCESS;
}

//派遣函数
NTSTATUS HelloDDKDispatchRoutine(IN PDEVICE_OBJECT pDevObj,IN PIRP pIrP)
{
#if DBG
	_asm int 3
#endif

	PIO_STACK_LOCATION stack = IoGetCurrentIrpStackLocation(pIrP);
	//建立一个字符串数组与IRP类型对应起来
	static char* irpname[] = 
	{
		"IRP_MJ_CREATE",
		"IRP_MJ_CREATE_NAMED_PIPE",
		"IRP_MJ_CLOSE",
		"IRP_MJ_READ",
		"IRP_MJ_WRITE",
		"IRP_MJ_QUERY_INFORMATION",
		"IRP_MJ_SET_INFORMATION",
		"IRP_MJ_QUERY_EA",
		"IRP_MJ_SET_EA",
		"IRP_MJ_FLUSH_BUFFERS",
		"IRP_MJ_QUERY_VOLUME_INFORMATION",
		"IRP_MJ_SET_VOLUME_INFORMATION",
		"IRP_MJ_DIRECTORY_CONTROL",
		"IRP_MJ_FILE_SYSTEM_CONTROL",
		"IRP_MJ_DEVICE_CONTROL",
		"IRP_MJ_INTERNAL_DEVICE_CONTROL",
		"IRP_MJ_SHUTDOWN",
		"IRP_MJ_LOCK_CONTROL",
		"IRP_MJ_CLEANUP",
		"IRP_MJ_CREATE_MAILSLOT",
		"IRP_MJ_QUERY_SECURITY",
		"IRP_MJ_SET_SECURITY",
		"IRP_MJ_POWER",
		"IRP_MJ_SYSTEM_CONTROL",
		"IRP_MJ_DEVICE_CHANGE",
		"IRP_MJ_QUERY_QUOTA",
		"IRP_MJ_SET_QUOTA",
		"IRP_MJ_PNP",
	};

	UCHAR type = stack->MajorFunction;

	if (type >= CountArray(irpname))
		KdPrint(("无效的IRP类型 %X\n", type));
	else
		KdPrint(("%s\n", irpname[type]));

	pIrP->IoStatus.Status=STATUS_SUCCESS;					//设置完成状态
	pIrP->IoStatus.Information=0;										//设置操作字节为0
	IoCompleteRequest(pIrP,IO_NO_INCREMENT);			//结束IRP派遣函数，第二个参数表示不增加优先级
	return STATUS_SUCCESS;
}