Device IDs and type at AddDevice or IRP_MJ_START_DEVICE

NTDEV
1

How can I get VID and PID, and if possible, Type FILE_DEVICE_* value of devices, in System class Lower Filter driver. Both in AddDevice() or after handling IRP_MJ_START_DEVICE are fine.

Will it be in UNICODE_STRING or there is a way to get numeric values in structure(s)?

Thanks
Aneel

2

The system class is very broad and generic, there is nothing you can really assume you can filter as a class lower filter. What bigger problem are you trying to solve?

d

Bent from my phone

From: xxxxx@gmail.commailto:xxxxx
Sent: ?10/?28/?2013 7:09 AM
To: Windows System Software Devs Interest Listmailto:xxxxx
Subject: [ntdev] Device IDs and type at AddDevice or IRP_MJ_START_DEVICE

How can I get VID and PID, and if possible, Type FILE_DEVICE_* value of devices, in System class Lower Filter driver. Both in AddDevice() or after handling IRP_MJ_START_DEVICE are fine.

Will it be in UNICODE_STRING or there is a way to get numeric values in structure(s)?

Thanks
Aneel

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3

Hmmm… Well, you can call IoGetDeviceProperty to get things like the hardware ID.

Is that what you’re looking for?

Peter
OSR