GPRS' PDCH idle filling

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Alexander Chemeris alexander.chemeris at gmail.com
Sat Oct 8 14:39:53 UTC 2011


Hi Harald,

On Sat, Oct 8, 2011 at 16:02, Harald Welte <laforge at gnumonks.org> wrote:
> Hi Alexander,
>
> On Sat, Oct 08, 2011 at 02:18:50AM +0400, Alexander Chemeris wrote:
>> Now, Osmocom's gsmtap.h have different channel ID's then gsmtap from
>> stock Wireshark. Does that mean that Osmocom's Wireshark have
>> different dissector implementation for PDCH/PACCH/PTCCH/etc then the
>> stock one? Which one is more advanced?
>
> a third party (actually, apparently developers of ip.access Ltd.) have
> merged GPRS related changes to wireshark mainline without consulting the
> author of the gsmtap.h header file (me).  This apparently was an
> accident and they have contacted me after it was included in wireshark.

I just realized that we also haven't contacted you about our WiMAX
changes to GSMTAP. We just posted our changes to the Wireshark tracker
and waited until they accept them. Sorry if this broken something for
you.

> So in order to resolve it, I had looked at their changes (wireshark
> mainline) and updated gsmtap.h in libosmocore to reflect their
> modifications.
>
> So I'm a  bit puzzled that you say there are again some differences.
> Can you please let me know more details where you found those
> incompatible values?

http://cgit.osmocom.org/cgit/libosmocore/tree/include/osmocom/core/gsmtap.h
vs
http://anonsvn.wireshark.org/viewvc/trunk/epan/dissectors/packet-gsmtap.c?revision=39288&view=markup

Value for GSMTAP_CHANNEL_PACCH

Still, my main question is what is the difference between Osmocom's
Wireshark and mainline?

-- 
Regards,
Alexander Chemeris.




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