驅動程式 - Kernel Mode Driver Framework (KMDF) - 使用範例 - C/C++ (WDF) - PNP - Use DPC Timer

參考資訊：
https://wasm.in/
http://four-f.narod.ru/
https://github.com/steward-fu/ddk

main.c

#include <ntddk.h>
#include <wdf.h>
 
#define DEV_NAME L"\\Device\\MyDriver"
#define SYM_NAME L"\\DosDevices\\MyDriver"
 
#define IOCTL_START CTL_CODE(FILE_DEVICE_UNKNOWN, 0x800, METHOD_BUFFERED, FILE_ANY_ACCESS)
#define IOCTL_STOP  CTL_CODE(FILE_DEVICE_UNKNOWN, 0x801, METHOD_BUFFERED, FILE_ANY_ACCESS)
 
ULONG cnt = 0;
KDPC dpc = { 0 };
KTIMER obj = { 0 };
PDEVICE_OBJECT pDevice = NULL;
 
void OnTimer(struct _KDPC *Dpc, PVOID DeferredContext, PVOID SystemArgument1, PVOID SystemArgument2)
{
    cnt += 1;
    DbgPrint("DpcTimer: %d\n", cnt);
}
    
void IrpFileCreate(WDFDEVICE myDevice, WDFREQUEST myRequest, WDFFILEOBJECT myFileObject)
{    
    DbgPrint("IRP_MJ_CREATE");
    WdfRequestComplete(myRequest, STATUS_SUCCESS);
}
 
void IrpFileClose(WDFFILEOBJECT myFileObject)
{
    DbgPrint("IRP_MJ_CLOSE");
}
 
void IrpIOCTL(WDFQUEUE myQueue, WDFREQUEST myRequest, size_t myOutLen, size_t myInLen, ULONG myCode)
{
    LARGE_INTEGER tt = { 0 };
     
    switch (myCode) {
    case IOCTL_START:
        DbgPrint("IOCTL_START");
        cnt = 0;
        tt.HighPart|= -1;
        tt.LowPart = (ULONG)-10000000;
        KeSetTimerEx(&obj, tt, 1000, &dpc);
        break;
    case IOCTL_STOP:
        DbgPrint("IOCTL_STOP");
        KeCancelTimer(&obj);
        break;
    }
    WdfRequestComplete(myRequest, STATUS_SUCCESS);
}
 
NTSTATUS AddDevice(WDFDRIVER myDriver, PWDFDEVICE_INIT pMyDeviceInit)
{
    WDFDEVICE device = { 0 };
    UNICODE_STRING szDevName = { 0 };
    UNICODE_STRING szSymName = { 0 };
    WDF_IO_QUEUE_CONFIG io_cfg = { 0 };
    WDF_FILEOBJECT_CONFIG file_cfg = { 0 };
     
    RtlInitUnicodeString(&szDevName, DEV_NAME);
    RtlInitUnicodeString(&szSymName, SYM_NAME);
    WdfDeviceInitAssignName(pMyDeviceInit, &szDevName);
     
    WdfDeviceInitSetIoType(pMyDeviceInit, WdfDeviceIoBuffered);
    WDF_FILEOBJECT_CONFIG_INIT(&file_cfg, IrpFileCreate, IrpFileClose, NULL);
    WdfDeviceInitSetFileObjectConfig(pMyDeviceInit, &file_cfg, WDF_NO_OBJECT_ATTRIBUTES);
    WdfDeviceCreate(&pMyDeviceInit, WDF_NO_OBJECT_ATTRIBUTES, &device);
    WdfDeviceCreateSymbolicLink(device, &szSymName);
     
    pDevice = WdfDeviceWdmGetDeviceObject(device);
    KeInitializeTimer(&obj);
    KeInitializeDpc(&dpc, OnTimer, pDevice);
    WDF_IO_QUEUE_CONFIG_INIT_DEFAULT_QUEUE(&io_cfg, WdfIoQueueDispatchSequential);
    io_cfg.EvtIoDeviceControl = IrpIOCTL;
    return WdfIoQueueCreate(device, &io_cfg, WDF_NO_OBJECT_ATTRIBUTES, WDF_NO_HANDLE);
}
 
NTSTATUS DriverEntry(PDRIVER_OBJECT pMyDriver, PUNICODE_STRING pRegistry)
{
    WDF_DRIVER_CONFIG config = { 0 };
 
    WDF_DRIVER_CONFIG_INIT(&config, AddDevice);
    return WdfDriverCreate(pMyDriver, pRegistry, WDF_NO_OBJECT_ATTRIBUTES, &config, WDF_NO_HANDLE);
}

app.c

#include <windows.h>
#include <winioctl.h>
#include <stdio.h>
#include <stdlib.h>
  
#define IOCTL_START CTL_CODE(FILE_DEVICE_UNKNOWN, 0x800, METHOD_BUFFERED, FILE_ANY_ACCESS)
#define IOCTL_STOP  CTL_CODE(FILE_DEVICE_UNKNOWN, 0x801, METHOD_BUFFERED, FILE_ANY_ACCESS)
  
int main(int argc, char **argv)
{
    DWORD dwRet = 0;
    HANDLE hFile = NULL;
  
    hFile = CreateFile("\\\\.\\MyDriver", GENERIC_READ | GENERIC_WRITE, 0, NULL, OPEN_EXISTING, 0, NULL);
    DeviceIoControl(hFile, IOCTL_START, NULL, 0, NULL, 0, &dwRet, NULL);
    Sleep(3000);
    DeviceIoControl(hFile, IOCTL_STOP, NULL, 0, NULL, 0, &dwRet, NULL);
    CloseHandle(hFile);
    return 0;
}

完成