Wireshark-bugs: [Wireshark-bugs] [Bug 4526] GSM MAP problem - IMSI in MO-ForwardSM not decoded
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From: bugzilla-daemon@xxxxxxxxxxxxx
Date: Tue, 9 Aug 2011 18:46:26 -0700 (PDT)
https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=4526

Jeff Morriss <jeff.morriss.ws@xxxxxxxxx> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
                 CC|                            |jeff.morriss.ws@xxxxxxxxx
         Resolution|                            |FIXED

--- Comment #6 from Jeff Morriss <jeff.morriss.ws@xxxxxxxxx> 2011-08-09 18:46:24 PDT ---
Actually the TCAP persistentdata stuff stores ACNs for situations just like
this.

The problem here, though, is that while the BEGIN goes from PC 5370->5354, the
CONTINUE comes back from 5352->6031.  The 3rd message (2nd CONTINUE) then goes
from 5370->5352.  The result is that the persistentdata stuff (when enabled in
the TCAP preferences) doesn't match the messages together.

Starting some time ago (r33097, present in 1.6.0), the SCCP dissector gained a
preference to set the source and destination GT addresses.  That helps in
situations like this: the GT addresses on both sides are stable and with that
preference enabled, the 3rd frame is correctly dissected (as a v3 SMS).

So: enable the SCCP preference to set the GT addresses and enable the TCAP
preferences for persistentdata.

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