From: Eliyas Yakub [eliyasy@microsoft.com]
Sent: Tuesday, January 23, 2001 11:06 AM
To: NT Developers Interest List
Subject: RE: [ntdev] IoRegisterDeviceInterface

 

-----Original Message----- 
From: Eliyas Yakub 
Sent: Fri 1/19/2001 10:52 AM 
To: 'NT Developers Interest List' 
Cc: 'paul@compelson.com' 
Subject: RE: [ntdev] IoRegisterDeviceInterface


Roughly from what I understand from your description, here are couple of
ways to solve your problem: 
 
1) You can make your filter driver to pop a PDO (follow the toaster busenum
driver sample) and do the enumeration of your smartcard driver.  If you use
one driver for all of these then that driver has to act as a filter (for the
keyboard stack), a bus driver (to pop a pdo), and a function driver for the
PDO. Complex but can be done. Toaster is there to help you. You can also
separate the function driver from the filter.
 
2) You can root-enumerate the smartcard driver and have it interface with
your keyboard filter at it's lower edge. You need to solve the dependency
issues between two drivers using PnP notification mechanism. This is easy to
do. Toastmon sample shows how to do this.
 
I don't know how much you understand PnP concept and not sure all of these
make sense to you. Your best option is a) try  your questions at
SmartCardDDK@DISCUSS.MICROSOFT.COM <mailto:your
SmartCardDDK@DISCUSS.MICROSOFT.COM>  b) If you don't get help there, call MS
tech support.
 
 
-Eliyas

-----Original Message-----
From: Hrdina Pavel [mailto:paul@compelson.com]
Sent: Wednesday, January 17, 2001 12:49 PM
To: NT Developers Interest List
Subject: [ntdev] IoRegisterDeviceInterface
Importance: High



Hello developers ! 

Now I write PC/SC driver for keyboard reader (W2K). 
So I have to filter i8042prt. This works well and my AddDevice 
routine successfully creates the device of type FILE_DEVICE_8042_PORT 
and attaches it to PDO. This is needed to filter PS/2 keyboard 
communication and this works well. 

But for smartcard manager I need another device of type 
FILE_DEVICE_SMARTCARD. This must not be in the device 
stack for i8042prt because of keyboard class and port 
driver interface. So I thought I must create separate device 
object. 

Now I create device with generating name and I treat this 
device object like PDO. But there is a problem when I want to create a 
symbolic link to this device using IoRegisterDeviceInterface. 
This function returns STATUS_INVALID_DEVICE_REQUEST. 
Reason is pointer at offset 14h of DeviceObjectExtension 
(undocumented so I don't know what is it) is NULL. 

So can some of you help me with creating device object 
for the reader and register it so symbolic link for SCM is created ? 
(I have all dispatch routines separated for keyboard filter device and 
for smartcard reader device) 

Thanks a lot for your patience 
Paul 

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