[Muscle] Serial number problems!

[peichinger at aaitg.com]

Hello all,

We came across various problems with PCSCLite in combination with serial 
numbers.
Our serial numbers are 32 byte long and along with the readername add up 
to more than MAX_READERNAME, so the serial number is cut off by snprintf() 
(hotplug_libusb.c/line: 514).
It's not only a cosmetical problem, it also has various aftereffects:

* PCSCLite is unable to remove the reader from its readerlist after 
unplugging the reader, eventhough the driver is (correctly) returning 
IFD_NO_SUCH_DEVICE.
* Connecting a second dualslot reader causes PCSCLite to segfault.

Undefining ADD_SERIAL_NUMBER in hotplug/libusb.c fixes these problems!

Options are:

* Increasing MAX_READERNAME or
* Adding a check if readername and serial nummer add up to more than 
MAX_READERNAME, in which case the serial number should be omitted.

We are in favour of the second option, also I don't see the point in 
adding the serial number to the readername, while an application can also 
retrieve it via SCardGetAttrib().

Mit freundlichen Grüßen
Best regards,

Philipp Eichinger

OMNIKEY GmbH
Ferihumerstrasse 13
A-4040 Linz
Austria

Tel        +43 (0) 732 / 602220  - 37
Fax       +43 (0) 732 / 602220  - 15 
E-Mail    peichinger at aaitg.com
Web       www.aaitg.com
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