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我写了一个简单的键盘过滤驱动程序(MyKbdFilter)，其注册注册表，并添加到HLM \系统\ CurrentControlSet \控制\ {类4D36E96B-E325-11CE-BFC1-08002BE10318} \的UpperFilters MyKbdFilter。现在我有：“kbdclass MyKbdFilter”。所以，当为键盘构建一个新的设备堆栈时，我会得到MyKbdFilter-> kdbclass-> kbHid-> HidUsb。当我插入键盘时，我看到DriverEntry，AddDevice，DispatchThru和DispatchPNP被调用。但键盘没有响应。在关键笔划上既不调用DispatchRead也不调用其他函数。 这里是我的代码：键盘过滤驱动程序不responsing

NTSTATUS DriverEntry(IN DRIVER_OBJECT* pDriverObject, IN UNICODE_STRING* pRegPath) {

int i;

NTSTATUS status;

for (i = 0; i <= IRP_MJ_MAXIMUM_FUNCTION; i++) {

pDriverObject->MajorFunction[i] = DispatchThru;

}

pDriverObject->MajorFunction[IRP_MJ_READ] = DispatchRead;

pDriverObject->MajorFunction[IRP_MJ_POWER] = DispatchPower;

pDriverObject->MajorFunction[IRP_MJ_PNP] = DispatchPNP;

pDriverObject->DriverUnload = UnloadDriver;

pDriverObject->DriverExtension->AddDevice = AddDevice;

return STATUS_SUCCESS;

}

NTSTATUS AddDevice(IN PDRIVER_OBJECT pDriverObject, IN PDEVICE_OBJECT pTargetDeviceObject){

PDEVICE_OBJECT pSourceDeviceObject, pDeviceObject;

PDEVICE_EXTENSION pDeviceExtension;

NTSTATUS status;

status = IoCreateDevice(pDriverObject, sizeof(DEVICE_EXTENSION), NULL, FILE_DEVICE_KEYBOARD, 0, FALSE, &pSourceDeviceObject);

pDeviceExtension = (PDEVICE_EXTENSION) pSourceDeviceObject->DeviceExtension;

pDeviceObject = IoAttachDeviceToDeviceStack(pSourceDeviceObject, pTargetDeviceObject);

pDeviceExtension->pLowerDeviceObject = pTargetDeviceObject;

pSourceDeviceObject->Flags = pDeviceObject->Flags & (DO_BUFFERED_IO | DO_POWER_PAGABLE | DO_DIRECT_IO);

pSourceDeviceObject->Flags = pDeviceObject->Flags &= ~DO_DEVICE_INITIALIZING;

return status;

}

NTSTATUS DispatchThru(IN PDEVICE_OBJECT pDeviceObject, IN PIRP pIrp) {

IoSkipCurrentIrpStackLocation(pIrp);

return IoCallDriver(((PDEVICE_EXTENSION) pDeviceObject->DeviceExtension)->pLowerDeviceObject ,pIrp);

}

NTSTATUS DispatchRead(IN PDEVICE_OBJECT pDeviceObject, IN PIRP pIrp) {

IoSkipCurrentIrpStackLocation(pIrp);

return IoCallDriver(((PDEVICE_EXTENSION) pDeviceObject->DeviceExtension)->pLowerDeviceObject ,pIrp);

}

编辑：我使用Windows 7

2016-10-20

Michael