我寫程序,喜歡以最簡單的方式寫,因為我怕眼花,我的程序只能看到程序功能,沒什么語法特點,都是最基本的.

#include <wdm.h>

#define NT_DEVICE_NAME L"//Device//Example"
#define DOS_DEVICE_NAME L"//DosDevices//Example"
VOID DriverUnload( IN PDRIVER_OBJECT pDriverObject );
NTSTATUS DispatchFunction( IN PDEVICE_OBJECT pDeviceObject, IN PIRP Irp );
NTSTATUS DispatchRead( IN PDEVICE_OBJECT pDeviceObject, IN PIRP Irp );
NTSTATUS DispatchWrite( IN PDEVICE_OBJECT pDeviceObject, IN PIRP Irp );
NTSTATUS DriverEntry( IN PDRIVER_OBJECT pDriverObject, IN PIRP Irp )
{
?NTSTATUS status = STATUS_SUCCESS;
?PDEVICE_OBJECT pDeviceObject = NULL;
?UNICODE_STRING usNtDeviceName, usDosDeviceName;
?int nIndex = 0;

?RtlInitUnicodeString( &usNtDeviceName, NT_DEVICE_NAME );

?status = IoCreateDevice( pDriverObject,
??????0,
??????&usNtDeviceName,
??????FILE_DEVICE_UNKNOWN,
??????FILE_DEVICE_SECURE_OPEN,
??????FALSE,
??????&pDeviceObject );
?if ( NT_SUCCESS(status) )
?{
??DbgPrint( "DriverEntry" );
??pDriverObject->DriverUnload = DriverUnload;
??RtlInitUnicodeString( &usDosDeviceName, DOS_DEVICE_NAME );
??IoCreateSymbolicLink( &usDosDeviceName, &usNtDeviceName );
??for (nIndex; nIndex <= IRP_MJ_MAXIMUM_FUNCTION; nIndex ++)
???pDriverObject->MajorFunction[ nIndex ] = DispatchFunction;
?}

?return status;
}

VOID DriverUnload( IN PDRIVER_OBJECT pDriverObject )
{
?UNICODE_STRING usDosDeviceName;
?RtlInitUnicodeString( &usDosDeviceName, DOS_DEVICE_NAME );
?DbgPrint( "DriverUnload" );
?IoDeleteSymbolicLink( &usDosDeviceName );
?IoDeleteDevice( pDriverObject->DeviceObject );
}

NTSTATUS DispatchFunction( IN PDEVICE_OBJECT pDeviceObject, IN PIRP Irp )
{
?NTSTATUS status = STATUS_SUCCESS;
?PIO_STACK_LOCATION irpStack = NULL;

?irpStack = IoGetCurrentIrpStackLocation( Irp );
?switch ( irpStack->MajorFunction )
?{
?case IRP_MJ_CREATE:
??break;
?case IRP_MJ_READ:
??DispatchRead( pDeviceObject, Irp );
??break;
?case IRP_MJ_WRITE:
??DispatchWrite( pDeviceObject, Irp );
??break;
?default:
??DbgPrint( "DispatchFunction" );
??break;
?}
?IoCompleteRequest( Irp, IO_NO_INCREMENT );
?return status;
}

NTSTATUS DispatchRead( IN PDEVICE_OBJECT pDeviceObject, IN PIRP Irp )
{
?NTSTATUS status = STATUS_SUCCESS;
?PIO_STACK_LOCATION irpStack = NULL;
?char *pBuf = "88888888";
?int nLen = sizeof ("88888888");
?irpStack = IoGetCurrentIrpStackLocation( Irp );
?if ( irpStack )
?{
??ProbeForWrite( Irp->UserBuffer, irpStack->Parameters.Read.Length, TYPE_ALIGNMENT(char) );
??RtlCopyMemory( Irp->UserBuffer, pBuf, nLen );
?}
?return status;
}

NTSTATUS DispatchWrite( IN PDEVICE_OBJECT pDeviceObject, IN PIRP Irp )
{
?NTSTATUS status = STATUS_SUCCESS;
?PIO_STACK_LOCATION irpStack = NULL;
?irpStack = IoGetCurrentIrpStackLocation( Irp );
?if ( irpStack )
?{
??ProbeForRead( Irp->UserBuffer, irpStack->Parameters.Read.Length, TYPE_ALIGNMENT(char) );
??DbgPrint( Irp->UserBuffer );
?}
?return status;
}

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