Ethereal-dev: RE: [Ethereal-dev] GSM decoding of WAP Pushes?

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From: "Anders Broman (AL/EAB)" <anders.broman@xxxxxxxxxxxx>
Date: Wed, 14 Dec 2005 15:25:45 +0100
Hi,
No one is hacking around in that area :) as far as I know, so you're
welcome to it...

Brg
Anders

-----Original Message-----
From: ethereal-dev-bounces@xxxxxxxxxxxx
[mailto:ethereal-dev-bounces@xxxxxxxxxxxx] On Behalf Of Dermot Bradley
Sent: den 14 december 2005 15:22
To: Ethereal development
Subject: [Ethereal-dev] GSM decoding of WAP Pushes?

Hi folks

For some time the SMPP dissector has correctly called the WSP & WBXML
decoders whenever it sees an SMS submission with a destination port of
2948 (so packets of structure eth:ip:tcp:smpp:gsm-sms-ud:wsp:wbxml).

I'm now looking at some SS7 captures that contain SMS-DELIVER (which go
as far as mtp3:sccp:tcap:gsm_map:gsm_sms). The destination port is
clearly 2948 but the WSP/WBXML decoder is not called.

Looking at this the SMPP dissector calls gsm-sms-ud (which is in
packet-gsm_sms_ud.c) whereas the GSM MAP dissector (packet-gsm_sms.c)
doesn't seem to check the significance of the destination port (in
functions dis_iei_apa_8bit and dis_iei_apa_16bit).

Is there any reason why these functions can't simply call the gsm-sms-ud
decoder? (why decode the UDH stuff anyway in packet-gsm_sms.c when the
gsm-sms-ud can do all that?)

Is anyone hacking around in this area of Ethereal at the moment?

-- 
Dermot Bradley                        dermot.bradley@xxxxxxxxxxxx
Senior TPS Engineer, Mobile Systems
Openwave Systems                      Direct: +44 28 90416218
Belfast, Northern Ireland             Fax:    +44 28 90416201

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