Wireshark-dev: Re: [Wireshark-dev] 3GPP RLC and MAC protocols support
From: "Martin Mathieson" <[email protected]>
Date: Tue, 8 Jan 2008 11:26:21 +0000
I don't know of anyone working on MAC or RLC dissectors.

FP is currently only available for Catapult DCT2000 and Tektronix K12 file formats, since those formats include the information needed to interpret the message payloads.  This amounts to using Wireshark as a different log viewer, rather than as a passive network analyser.

In order to decode the MAC and RLC layers, you'd need to either:
(a) use a file format that gives you this information directly (as above), OR
(b) infer the FP/MAC/RLC layer configuration/state using information gleaned from RRC configuration messages, OR MAYBE
(c) guess from the message size/timing/contents that common transport formats have been used, e.g. there are standard settings using with AMR co-ordinated channels? OR EVEN LESS LIKELY
(d) get all of this information from preference settings.  I think this is probably a non-starter since so much of the information is per-channel or even per-frame.

I'd love to see someone do this, but know that it isn't trivial - my company (Catapult) built such an analyser (using (b) - before I joined).

I could have extended the approach of (a) for the DCT2000 format, i.e. dissect our own proprietary primitive headers then use this and other information in the file format to hand off to pure MAC or RLC dissectors (that would use attached information, as the FP dissector does), but this would still just be using Wireshark as a different log viewer, I don't know of any other file formats that would then be able to take advantage of these dissectors in the same way (possibly K12 again...).  I believe the headers for MAC and RLC are quite short, and that it would take more effort to dissect the proprietary headers than it would for the actual protocol headers.


On Jan 8, 2008 10:41 AM, Anders Broman <[email protected]> wrote:
An RRC dissector (packet-rrc.c) exists but only partly used. Some time
ago some one
asked about MAC and probably did something with it but nothing was
commited back to WS.
These are somewhere in the middle of the tread

-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of
[email protected]
Sent: den 8 januari 2008 15:35
To: Developer support list for Wireshark
Subject: [Wireshark-dev] 3GPP RLC and MAC protocols support


Is anybody working on dissectors for 3GPP-UMTS- RLC and MAC protocols ?
Or are these dissectors already available somewhere ?

Thanks & Regards,

***********************  Aricent-Unclassified   ***********************

"DISCLAIMER: This message is proprietary to Aricent  and is intended
solely for the use of the individual to whom it is addressed. It may
contain privileged or confidential information and should not be
circulated or used for any purpose other than for what it is intended.
If you have received this message in error, please notify the originator
immediately. If you are not the intended recipient, you are notified
that you are strictly prohibited from using, copying, altering, or
disclosing the contents of this message. Aricent accepts no
responsibility for loss or damage arising from the use of the
information transmitted by this email including damage from virus."

Wireshark-dev mailing list
[email protected]
Wireshark-dev mailing list
[email protected]