wireshark, viewing Abis communication

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Nordin Bouchtaoui bouchtaoui at gmail.com
Wed Jul 29 20:43:55 UTC 2009


Sorry Harald,

Should read the info on the wiki better. And also the debugging output
reveals some info. Anyway thanks.



2009/7/29 Harald Welte <laforge at gnumonks.org>

> On Wed, Jul 29, 2009 at 05:31:03PM +0200, Nordin wrote:
> > Hello Harald,
> >
> > Should the plugin you added for Wireshark decode almost all messages
> > or not? Cause on the OML layer a lot of OML messages are not
> > decoded, is this behaviour normal?
>
> there is a oml decoder plugin, I've posted it to this list, it is in our
> git
> tree and it is mentioned in the wiki, so it should be pretty easy to find.
>
> > I now try to follow the communication flow, but can't seem to
> > understand the multiple  OML messages. It starts with 0x00, than a
> > datalen and than protocol (0xFF) and than it starts with 0x80,
> > 0x80,.... But I can't find 0x80 (messagetype) in OpenBSC source.
> > I've checked ipaccess.h and ipaccess.c, but nothing...maybe I lokked
> > at the wrong place.
>
> oml is implemented in abis_nm.c
>
> --
> - Harald Welte <laforge at gnumonks.org>
> http://laforge.gnumonks.org/
>
> ============================================================================
> "Privacy in residential applications is a desirable marketing option."
>                                                  (ETSI EN 300 175-7 Ch. A6)
>
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