驅動程式 - Windows NT Driver (Legacy) - 使用範例 - C/C++ (DDK) - Handle File IRP - Choose DO_NEITHER_IO

參考資訊：
https://wasm.in/
http://four-f.narod.ru/
https://github.com/steward-fu/ddk
http://www.delphibasics.info/home/delphibasicsprojects/delphidriverdevelopmentkit

main.c

#include <ntddk.h>
    
#define DEV_NAME L"\\Device\\MyDriver"
#define SYM_NAME L"\\DosDevices\\MyDriver"
 
char szBuffer[255] = { 0 };
 
void Unload(PDRIVER_OBJECT pMyDriver)
{
    UNICODE_STRING usSymboName = { 0 };
             
    RtlInitUnicodeString(&usSymboName, L"\\DosDevices\\MyDriver");
    IoDeleteSymbolicLink(&usSymboName);
    IoDeleteDevice(pMyDriver->DeviceObject);
}
 
NTSTATUS IrpFile(PDEVICE_OBJECT pMyDevice, PIRP pIrp)
{
    ULONG len = 0;
    PUCHAR pBuf = NULL;
    PIO_STACK_LOCATION psk = IoGetCurrentIrpStackLocation(pIrp);
    
    switch (psk->MajorFunction) {
    case IRP_MJ_CREATE:
        memset(szBuffer, 0, sizeof(szBuffer));
        DbgPrint("IRP_MJ_CREATE");
        break;
    case IRP_MJ_READ:
        pBuf = pIrp->UserBuffer;
        strcpy(pBuf, szBuffer);
        DbgPrint("IRP_MJ_READ");

        pIrp->IoStatus.Status = STATUS_SUCCESS;
        pIrp->IoStatus.Information = strlen(szBuffer);
        break;
    case IRP_MJ_WRITE:
        len = psk->Parameters.Write.Length;
        pBuf = pIrp->UserBuffer;
        memcpy(szBuffer, pBuf, len);
        DbgPrint("IRP_MJ_WRITE");

        DbgPrint("Address: 0x%x, Length: %d", pBuf, len);
        pIrp->IoStatus.Status = STATUS_SUCCESS;
        pIrp->IoStatus.Information = strlen(szBuffer);
        break;
    case IRP_MJ_CLOSE:
        DbgPrint("IRP_MJ_CLOSE");
        break;
    }
    IoCompleteRequest(pIrp, IO_NO_INCREMENT);
    return STATUS_SUCCESS;
}
    
NTSTATUS DriverEntry(PDRIVER_OBJECT pMyDriver, PUNICODE_STRING pMyRegistry)
{
    PDEVICE_OBJECT pMyDevice = NULL;
    UNICODE_STRING usSymboName = { 0 };
    UNICODE_STRING usDeviceName = { 0 };
         
    pMyDriver->MajorFunction[IRP_MJ_CREATE] = IrpFile;
    pMyDriver->MajorFunction[IRP_MJ_READ]   = IrpFile;
    pMyDriver->MajorFunction[IRP_MJ_WRITE]  = IrpFile;
    pMyDriver->MajorFunction[IRP_MJ_CLOSE]  = IrpFile;
    pMyDriver->DriverUnload = Unload;
             
    RtlInitUnicodeString(&usDeviceName, L"\\Device\\MyDriver");
    IoCreateDevice(pMyDriver, 0, &usDeviceName, FILE_DEVICE_UNKNOWN, 0, FALSE, &pMyDevice);
    RtlInitUnicodeString(&usSymboName, L"\\DosDevices\\MyDriver");
    IoCreateSymbolicLink(&usSymboName, &usDeviceName);
    pMyDevice->Flags &= ~DO_DEVICE_INITIALIZING;
    return STATUS_SUCCESS;
}

完成