驱动与应用层简单消息通信

/* 驱动SYS irp1.h */  
#include <ntddk.h>   
  
/*采用缓冲区内存模式IOCTL， 
  MY_DVC_BUFFERED_CODE是自定义的控制码*/  
#define MY_DVC_BUFFERED_CODE /   
        (ULONG)CTL_CODE(FILE_DEVICE_UNKNOWN, /  
        0x900, /  
        METHOD_BUFFERED, /  
        FILE_ANY_ACCESS)  
  
  
//---------函数声明---------   
NTSTATUS   
DriverEntry(IN PDRIVER_OBJECT DriverObject,   
            IN PUNICODE_STRING registryPath);  
  
NTSTATUS  
MyDeviceIoControl(IN PDEVICE_OBJECT DeviceObject,  
                  IN PIRP Irp);  
  
NTSTATUS  
MyCreateClose(IN PDEVICE_OBJECT DeviceObject,  
              IN PIRP Irp);  
  
VOID  
MyDriverOnUnload(IN PDRIVER_OBJECT DriverObject);  
//-------------------------   
  
/* 驱动SYS irp1.c */  
#include "irp1.h"   
  
//------------驱动入口----------   
NTSTATUS DriverEntry( IN PDRIVER_OBJECT DriverObject, IN PUNICODE_STRING registryPath )  
{  
    NTSTATUS ntStatus = STATUS_SUCCESS;  
    PDEVICE_OBJECT Device;  
    UNICODE_STRING DeviceName, DeviceLink;  //设备名，符号链接名   
  
    DbgPrint("[Aliwy] DriverEntry/n");  
  
    RtlInitUnicodeString(&DeviceName, L"//Device//Aliwy");         //初始化设备名  
    RtlInitUnicodeString(&DeviceLink, L"//DosDevices//IamAliwy");  //初始化符号链接名  
  
    /* IoCreateDevice 生成设备对象 */  
    ntStatus = IoCreateDevice(DriverObject,         //生成设备的驱动对象   
                              0,                    //设备扩展区内存大小   
                              &DeviceName,          //设备名，/Device/Aliwy   
                              FILE_DEVICE_UNKNOWN,  //设备类型   
                              0,                    //填写0即可   
                              FALSE,                //必须为FALSE   
                              &Device);             //设备对象指针返回到DeviceObject中   
    if (!NT_SUCCESS(ntStatus))  
    {  
        DbgPrint("[Aliwy] IoCreateDevice FALSE: %.8X/n", ntStatus);  
        return ntStatus;  //生成失败就返回   
    }  
    else  
       DbgPrint("[Aliwy] IoCreateDevice SUCCESS/n");  
  
    /* IoCreateSymbolicLink 生成符号链接 */  
    ntStatus = IoCreateSymbolicLink(&DeviceLink, &DeviceName);  
    if (!NT_SUCCESS(ntStatus))  
    {  
        DbgPrint("[Aliwy] IoCreateSymbolicLink FALSE: %.8X/n", ntStatus);  
        IoDeleteDevice(Device);  //删除设备   
        return ntStatus;  
    }  
    else  
        DbgPrint("[Aliwy] IoCreateSymbolicLink SUCCESS/n");  
  
    Device->Flags &= ~DO_DEVICE_INITIALIZING;  //设备初始化完成标记   
  
    DriverObject->DriverUnload = MyDriverOnUnload;  
      
    /*设备控制请求，对应Ring3 DeviceIoControl*/  
    DriverObject->MajorFunction[IRP_MJ_DEVICE_CONTROL] = MyDeviceIoControl;  
    /*设备打开请求，对应Ring3 CreateFile*/                      //   
    DriverObject->MajorFunction[IRP_MJ_CREATE] = MyCreateClose; //  要与应用层通信，   
    /*设备关闭请求，对应Ring3 CloseHandle*/                     //  必须有打开、关闭请求！   
    DriverObject->MajorFunction[IRP_MJ_CLOSE] = MyCreateClose;  //      
  
    return ntStatus;  
}  
//------------------------------   
  
//---------设备请求处理---------   
NTSTATUS MyDeviceIoControl( IN PDEVICE_OBJECT DeviceObject, IN PIRP Irp )  
{  
    PIO_STACK_LOCATION irpSp; //当前IRP调用栈空间   
    ULONG code;               //功能号   
    NTSTATUS ntStatus = STATUS_SUCCESS;  
    ULONG inBufLength;        //输入缓冲区长度   
    ULONG outBufLength;       //输出缓冲区长度   
    PCHAR inBuf;              //输入缓冲区   
    PCHAR outBuf;             //输出缓冲区   
    PCHAR outData = "[Aliwy] outBuf: This String is from Driver !!!"; //要向应用层输出的信息  
    ULONG outDataLen = strlen(outData) + 1;  //信息长度含结尾一个NULL   
  
    DbgPrint("[Aliwy] MyDeviceIoControl/n");  
  
    irpSp = IoGetCurrentIrpStackLocation(Irp);               //获得当前IRP调用栈空间   
    code = irpSp->Parameters.DeviceIoControl.IoControlCode;  //得到功能号，即控制码   
    inBufLength = irpSp->Parameters.DeviceIoControl.InputBufferLength;   //得到输入缓冲区长度   
    outBufLength = irpSp->Parameters.DeviceIoControl.OutputBufferLength; //得到输出缓冲区长度   
    inBuf = Irp->AssociatedIrp.SystemBuffer;  //输入缓冲区   
    outBuf = Irp->AssociatedIrp.SystemBuffer; //输出缓冲区   
  
    if (code == MY_DVC_BUFFERED_CODE)  //我们自定义的控制码   
    {  
        DbgPrint("[Aliwy] inBuf: %s/n", inBuf);      //打印出应用层传入的内容   
  
        RtlCopyBytes(outBuf, outData, outBufLength); //复制我们要传入的内容到输出缓冲区   
  
        Irp->IoStatus.Information = (outBufLength < outDataLen ? outBufLength : outDataLen);  
        Irp->IoStatus.Status = STATUS_SUCCESS;  
    }  
    else    
    {     
        Irp->IoStatus.Information = 0;  
        Irp->IoStatus.Status = STATUS_INVALID_PARAMETER;  
    }  
    IoCompleteRequest(Irp, IO_NO_INCREMENT); //结束IRP请求   
  
    DbgPrint("[Aliwy] MyDeviceIoControl Over/n");  
    return Irp->IoStatus.Status;  
}  
//------------------------------   
  
//----------打开关闭------------   
NTSTATUS MyCreateClose( IN PDEVICE_OBJECT DeviceObject, IN PIRP Irp )  
{  
    DbgPrint("[Aliwy] MyCreateClose/n");  
    Irp->IoStatus.Information = 0;  
    Irp->IoStatus.Status = STATUS_SUCCESS;  
    IoCompleteRequest(Irp, IO_NO_INCREMENT);  
    return Irp->IoStatus.Status;  
}  
//------------------------------   
  
//----------驱动卸载------------   
VOID MyDriverOnUnload( IN PDRIVER_OBJECT DriverObject )  
{  
    UNICODE_STRING DeviceLink; //符号链接名   
    DbgPrint("[Aliwy] MyDriverOnUnload/n");  
  
    RtlInitUnicodeString(&DeviceLink, L"//DosDevices//IamAliwy");  
    IoDeleteSymbolicLink(&DeviceLink); //删除符号链接   
    if (DriverObject->DeviceObject != NULL)  
    {  
        IoDeleteDevice(DriverObject->DeviceObject);  //删除设备   
    }  
}  
//------------------------------   
  
  
  
/* 应用层EXE irp1.cpp */  
#include <windows.h>   
#include <winioctl.h>   
#include <stdio.h>   
  
/*采用缓冲区内存模式IOCTL，MY_DVC_IN_CODE是自定义的控制码*/  
#define MY_DVC_BUFFERED_CODE /   
       (ULONG)CTL_CODE(FILE_DEVICE_UNKNOWN, /  
        0x900, /  
        METHOD_BUFFERED, /  
        FILE_ANY_ACCESS)  
  
void main()  
{  
    ULONG bytesReturned;  
    char inBuf[50] = "This String is from User !!!";  //传入驱动的内容   
    char outBuf[50];  //用于接收驱动传出内容的缓冲区   
  
    /*打开设备，用我们自定的符号链接，响应驱动IRP_MJ_CREATE*/  
    HANDLE hDevice = CreateFile("////.//IamAliwy",  
                                GENERIC_READ | GENERIC_WRITE,  
                                0,  
                                NULL,  
                                CREATE_ALWAYS,  
                                FILE_ATTRIBUTE_NORMAL,  
                                NULL);  
    if (hDevice == INVALID_HANDLE_VALUE)  
    {  
        printf("设备打开失败 %d %.8x/n", GetLastError(), hDevice);  
        return;  
    }  
  
    memset(outBuf, 0, sizeof(outBuf));   
  
    /*控制设备，响应驱动IRP_MJ_DEVICE_CONTROL*/  
    BOOL ret = DeviceIoControl(hDevice,  
                               MY_DVC_BUFFERED_CODE, //我们自定义的功能号   
                               &inBuf,               //传入驱动的内容   
                               strlen(inBuf) + 1,    //传入内容长度   
                               &outBuf,              //驱动输出的缓冲区   
                               sizeof(outBuf),       //驱动输出缓冲区大小   
                               &bytesReturned,       //返回的长度   
                               NULL);  
    if (!ret)  
    {  
        printf("Error in DeviceIoControl: %d", GetLastError());  
    }  
    else  
        printf("%s(%d)/n", outBuf, bytesReturned);   //打印驱动传给我们的内容   
      
    /*关闭设备，对应驱动IRP_MJ_CLOSE*/  
    CloseHandle(hDevice);  
}