本文是一篇譯文，主要以實例形式講述了C++中DeviceIoCteatol的用法。分享給大家供大家參考。具體方法如下：
應用程序代碼如下：
DWORD dwBytesReturned = 0;
BYTE bytBuffer_1[512];
BYTE bytBuffer_2[512];
CHAR string[2048];
HANDLE hDevice, hDriver;
BOOL bRet;
bRet = DeviceIoControl(hDriver, IOCTL_WRITE, (LPVOID)bytBuffer_1, 512,
NULL, 0, &dwBytesReturned, NULL);
if(bRet == FALSE)
{
printf("/nFailed - DeviceIoControl - IOCTL_WRITE./n");
return 0;
}
printf("/nWrite MBR using I/O port operations.../n");
bRet = ReadFile(hDevice, (LPVOID)bytBuffer_1, 512, &dwBytesReturned, NULL);
if(bRet == FALSE)
{
printf("/nFailed - ReadFile - the second one./n");
return 0;
}
printf("/nRead MBR using the ReadFile function.../n");
printf("- - - - - - - - - - - - - - - - - - - - - - - - - - - -");
sprintf(string, "/n");
for(DWORD n = 0; n < 512; n++)
{
sprintf(string, "%s %02X", string, bytBuffer_1[n]);
if(((n + 1) % 16) == 0)
sprintf(string, "%s/n", string);
if(((n + 1) % 16) == 8)
sprintf(string, "%s -", string);
}
printf("%s", string);
printf("- - - - - - - - - - - - - - - - - - - - - - - - - - - -");
bRet = DeviceIoControl(hDriver, IOCTL_READ, NULL, 0, (LPVOID)bytBuffer_2, 512,
&dwBytesReturned, NULL);
if(bRet == FALSE)
{
printf("/nFailed - DeviceIoControl - IOCTL_READ - the second one./n");
return 0;
}
printf("/nRead MBR using I/O port operations.../n");
printf("- - - - - - - - - - - - - - - - - - - - - - - - - - - -");
sprintf(string, "/n");
for(DWORD t = 0; t < 512; t++)
{
sprintf(string, "%s %02X", string, bytBuffer_2[t]);
if(((t + 1) % 16) == 0)
sprintf(string, "%s/n", string);
if(((t + 1) % 16) == 8)
sprintf(string, "%s -", string);
}
printf("%s", string);
printf("- - - - - - - - - - - - - - - - - - - - - - - - - - - -");
printf("/nSucceed - Kill HDDGMon./n");
return 1;
}
驅動代碼如下：
#include <ntddk.h>
#define DEVICE_NAME L"http://Device//KillHDDGMon"
#define LINK_NAME L"http://DosDevices//KillHDDGMon"
#define IOCTL_WRITE CTL_CODE(FILE_DEVICE_UNKNOWN, 0x800, METHOD_BUFFERED, FILE_ANY_ACCESS)
#define IOCTL_READ CTL_CODE(FILE_DEVICE_UNKNOWN, 0x801, METHOD_BUFFERED, FILE_ANY_ACCESS)
VOID Unload(
__in struct _DRIVER_OBJECT *DriverObject
)
{
UNICODE_STRING ustrLinkName;
DbgPrint("Driver Unload.....");
RtlInitUnicodeString(&ustrLinkName, LINK_NAME);
IoDeleteSymbolicLink(&ustrLinkName);
IoDeleteDevice(DriverObject->DeviceObject);
}
NTSTATUS DispatchCreateClose(
__inout struct _DEVICE_OBJECT *DeviceObject,
__inout struct _IRP *Irp
)
{
NTSTATUS status = STATUS_SUCCESS;
KdPrint(("Dispatch CreateClose..."));
Irp->IoStatus.Status = status;
IoCompleteRequest(Irp, IO_NO_INCREMENT);
return status;
}
NTSTATUS DispatchIoctl(
__inout struct _DEVICE_OBJECT *DeviceObject,
__inout struct _IRP *Irp
)
{
NTSTATUS status = STATUS_SUCCESS;
PIO_STACK_LOCATION pIrpStack;
ULONG outSize;
ULONG IoControlCode;
PVOID pIoBuffer;
KdPrint(("Dispatch Ioctl..."));
pIoBuffer = Irp->AssociatedIrp.SystemBuffer;
pIrpStack = IoGetCurrentIrpStackLocation(Irp);
outSize = pIrpStack->Parameters.DeviceIoControl.OutputBufferLength;
IoControlCode = pIrpStack->Parameters.DeviceIoControl.IoControlCode;
switch (IoControlCode)
{
case IOCTL_WRITE:
__asm
{
push eax
push edx
//---------------------------------------------------
// 以下代碼用I/O端口來寫主引導區
mov dx,1f6h // 要讀入的磁盤號及磁頭號
mov al,0a0h // 磁盤0，磁頭0
out dx,al
mov dx,1f2h // 要寫的扇區數量
mov al,1 // 寫一個扇區
out dx,al
mov dx,1f3h // 要寫的扇區號
mov al,1 // 寫到1扇區
out dx,al
mov dx,1f4h // 要寫的柱面的低8位
mov al,0 // 低8位為0
out dx,al
mov dx,1f5h // 要寫的柱面的高2位
mov al,0 // 高2位為0
out dx,al
mov dx,1f7h // 命令端口
mov al,30h // 嘗試著寫扇區
out dx,al
still_going_1:
in al,dx
test al,8 // 如果扇區緩沖沒有準備好的話則跳轉，直到準備好才向下執行
jz still_going_1
pop edx
pop eax
}
WRITE_PORT_BUFFER_USHORT((PUSHORT)0x1f0, (PUSHORT)pIoBuffer, 256);
status = STATUS_SUCCESS;
break;
case IOCTL_READ:
if (outSize >= 512)
{
__asm
{
push eax
push edx
//---------------------------------------------------
// 以下代碼用I/O端口來讀主引導區
mov dx,1f6h // 要讀入的磁盤號及磁頭號
mov al,0a0h // 磁盤0，磁頭0
out dx,al
mov dx,1f2h // 要讀入的扇區數量
mov al,1 // 讀一個扇區
out dx,al
mov dx,1f3h // 要讀的扇區號
mov al,1 // 扇區號為1
out dx,al
mov dx,1f4h // 要讀的柱面的低8位
mov al,0 // 柱面低8位為0
out dx,al
mov dx,1f5h // 柱面高2位
mov al,0 // 柱面高2位為0（通過1F4H和1F5H端口我們可以確定用來讀的柱面號是0）
out dx,al
mov dx,1f7h // 命令端口
mov al,20h // 嘗試讀取扇區
out dx,al
still_going_2:
in al,dx // 扇區緩沖是否準備好
test al,8 // 如果扇區緩沖沒有準備好的話則跳轉，直到準備好才向下執行。
jz still_going_2
/* mov cx,512/2 // 設置循環次數（512/2次）
mov di,offset buffer
mov dx,1f0h // 將要傳輸的一個字節的數據
rep insw // 傳輸數據 */
//---------------------------------------------------
pop edx
pop eax
}
READ_PORT_BUFFER_USHORT((PUSHORT)0x1f0, (PUSHORT)pIoBuffer, 256);
status = STATUS_SUCCESS;
}
else
{
Irp->IoStatus.Information = 0;
status = STATUS_BUFFER_TOO_SMALL;
}
break;
}
Irp->IoStatus.Status = status;
IoCompleteRequest(Irp, IO_NO_INCREMENT);
return status;
}
NTSTATUS DriverEntry(
__in struct _DRIVER_OBJECT *DriverObject,
__in PUNICODE_STRING RegistryPath
)
{
NTSTATUS status = STATUS_SUCCESS;
UNICODE_STRING ustrDevName;
UNICODE_STRING ustrLinkName;
PDEVICE_OBJECT pDevObj=NULL;
DriverObject->DriverUnload = Unload;
DriverObject->MajorFunction[IRP_MJ_CREATE] = DispatchCreateClose;
DriverObject->MajorFunction[IRP_MJ_CLOSE] = DispatchCreateClose;
DriverObject->MajorFunction[IRP_MJ_DEVICE_CONTROL] = DispatchIoctl;
RtlInitUnicodeString(&ustrDevName, DEVICE_NAME);
status = IoCreateDevice(DriverObject, 0, &ustrDevName, FILE_DEVICE_UNKNOWN, 0,FALSE, &pDevObj);
if (!NT_SUCCESS(status))
{
return status;
}
RtlInitUnicodeString(&ustrLinkName, LINK_NAME);
status = IoCreateSymbolicLink(&ustrLinkName, &ustrDevName);
if (!NT_SUCCESS(status))
{
IoDeleteSymbolicLink(&ustrLinkName);
return status;
}
return status;
}
希望本文所述對大家的C++程序設計有所幫助。
