[wdmaudiodev] How can I open my virtual audio driver and send IOCTL to it?
- From: hollychen(??源=研?) <hollychen@xxxxxxxxxxx>
- To: "wdmaudiodev" <wdmaudiodev@xxxxxxxxxxxxx>
- Date: Thu, 10 Jun 2004 00:34:53 +0800
I'm a newbie in WDM. I wanna send IOCTL to my virtual audio driver,
but I failed to open my driver in user-mode application.
In audio driver side, I registers an interface,
AddDevice
(
IN PDRIVER_OBJECT DriverObject,
IN PDEVICE_OBJECT PhysicalDeviceObject
)
{
...
ntStatus =
PcAddAdapterDevice
(
DriverObject,
PhysicalDeviceObject,
PCPFNSTARTDEVICE(StartDevice),
MAX_MINIPORTS,
0
);
...
ntStatus = IoRegisterDeviceInterface(PhysicalDeviceObject,
&GUID_DEVINTERFACE_BT_AUDIO, NULL, &ifname);
...
ntStatus = IoSetDeviceInterfaceState(&ifname, TRUE);
}
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
In application side,
HDEVINFO info = SetupDiGetClassDevs(&GUID_DEVINTERFACE_BT_AUDIO,
NULL, NULL, DIGCF_PRESENT | DIGCF_INTERFACEDEVICE);
...
if (SetupDiEnumDeviceInterfaces(info, NULL, &GUID_DEVINTERFACE_BT_AUDIO, 0,
&ifdata))
{
...
SetupDiGetDeviceInterfaceDetail(info, &ifdata, NULL, 0, &needed, NULL);
PSP_INTERFACE_DEVICE_DETAIL_DATA detail = (PSP_INTERFACE_DEVICE_DETAIL_DATA)
malloc(needed);
SP_DEVINFO_DATA did = {sizeof(SP_DEVINFO_DATA)};
detail->cbSize = sizeof(SP_INTERFACE_DEVICE_DETAIL_DATA);
if (!SetupDiGetDeviceInterfaceDetail(info, &ifdata, detail, needed, NULL,
&did))
{ ... }
...
strcpy(fileName, detail->DevicePath);
...
}
SetupDiDestroyDeviceInfoList(info);
////////////////////////////////////////////////////
HANDLE hdevice = CreateFile(fileName, GENERIC_READ | GENERIC_WRITE, 0, NULL,
OPEN_EXISTING, 0, NULL);
The CreateFile() always return 2 (ERROR_FILE_NOT_FOUND).
What's the problem with my code?
Any suggestions/hints will be much appreciated!
Holly
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