驅動程式 - Windows Driver Model (WDM) - 使用範例 - C/C++ (DDK) - Use Deferred Procedure Call(DPC)

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

main.c

#include <wdm.h>
 
#define DEV_NAME L"\\Device\\MyDriver"
#define SYM_NAME L"\\DosDevices\\MyDriver"
 
KDPC stDPC = {0};
PDEVICE_OBJECT pNextDevice = NULL;
 
void DPC_Handler(struct _KDPC *Dpc, PVOID pContext, PVOID pArg1, PVOID pArg2)
{
    DbgPrint("DPC_Handler\n");
}
 
NTSTATUS AddDevice(PDRIVER_OBJECT pMyDriver, PDEVICE_OBJECT pPhyDevice)
{
    PDEVICE_OBJECT pMyDevice = NULL;
    UNICODE_STRING usDeviceName = { 0 };
    UNICODE_STRING usSymbolName = { 0 };
 
    RtlInitUnicodeString(&usDeviceName, DEV_NAME);
    IoCreateDevice(pMyDriver, 0, &usDeviceName, FILE_DEVICE_UNKNOWN, 0, FALSE, &pMyDevice);
    RtlInitUnicodeString(&usSymbolName, SYM_NAME);
    IoCreateSymbolicLink(&usSymbolName, &usDeviceName);
    pNextDevice = IoAttachDeviceToDeviceStack(pMyDevice, pPhyDevice);
    pMyDevice->Flags &= ~DO_DEVICE_INITIALIZING;
    pMyDevice->Flags |= DO_BUFFERED_IO;
     
    KeInitializeDpc(&stDPC, DPC_Handler, pMyDevice);
    return STATUS_SUCCESS;
}
 
void Unload(PDRIVER_OBJECT pMyDriver)
{
    pMyDriver = pMyDriver;
}
 
NTSTATUS IrpPnp(PDEVICE_OBJECT pMyDevice, PIRP pIrp)
{
    UNICODE_STRING usSymbolName = { 0 };
    PIO_STACK_LOCATION pStack = IoGetCurrentIrpStackLocation(pIrp);
 
    if (pStack->MinorFunction == IRP_MN_START_DEVICE) {
        KeInsertQueueDpc(&stDPC, 0, 0);
    }
    else if (pStack->MinorFunction == IRP_MN_REMOVE_DEVICE) {
        RtlInitUnicodeString(&usSymbolName, SYM_NAME);
        IoDeleteSymbolicLink(&usSymbolName);
        IoDetachDevice(pNextDevice);
        IoDeleteDevice(pMyDevice);
        IoCompleteRequest(pIrp, IO_NO_INCREMENT);
        return STATUS_SUCCESS;
    }
    IoSkipCurrentIrpStackLocation(pIrp);
    return IoCallDriver(pNextDevice, pIrp);
}
 
NTSTATUS DriverEntry(PDRIVER_OBJECT pMyDriver, PUNICODE_STRING pMyRegistry)
{
    pMyDriver->MajorFunction[IRP_MJ_PNP] = IrpPnp;
    pMyDriver->DriverExtension->AddDevice = AddDevice;
    pMyDriver->DriverUnload = Unload;
    return STATUS_SUCCESS;
}

在收到IRP_MN_START_DEVICE時，插入一個新的DPC Task，用來處理資源的移除

完成