Wireshark-bugs: [Wireshark-bugs] [Bug 6542] New: Wireshark's failing to dissect the LAPD payload
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From: bugzilla-daemon@xxxxxxxxxxxxx
Date: Sat, 5 Nov 2011 07:06:21 -0700 (PDT)
https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=6542

           Summary: Wireshark's failing to dissect the LAPD payload as
                    DPNSS
           Product: Wireshark
           Version: 1.7.x (Experimental)
          Platform: Other
        OS/Version: Windows 7
            Status: NEW
          Severity: Normal
          Priority: Low
         Component: Wireshark
        AssignedTo: bugzilla-admin@xxxxxxxxxxxxx
        ReportedBy: keithfrench@xxxxxxxxxxxxx


Build Information:
Version 1.7.0-SVN-39724 (SVN Rev 39724 from /trunk)

Copyright 1998-2011 Gerald Combs <gerald@xxxxxxxxxxxxx> and contributors.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

Compiled (32-bit) with GTK+ 2.22.1, with Cairo 1.10.2, with Pango 1.28.3, with
GLib 2.26.1, with WinPcap (version unknown), with libz 1.2.5, without POSIX
capabilities, with threads support, with SMI 0.4.8, with c-ares 1.7.1, with Lua
5.1, without Python, with GnuTLS 2.10.3, with Gcrypt 1.4.6, with MIT Kerberos,
with GeoIP, with PortAudio V19-devel (built Nov  3 2011), with AirPcap.

Running on 32-bit Windows 7 Service Pack 1, build 7601, with WinPcap version
4.1.2 (packet.dll version 4.1.0.2001), based on libpcap version 1.0 branch
1_0_rel0b (20091008), GnuTLS 2.10.3, Gcrypt 1.4.6, without AirPcap.

Built using Microsoft Visual C++ 9.0 build 21022

Wireshark is Open Source Software released under the GNU General Public
License.

Check the man page and http://www.wireshark.org for more information.
--
FAO Guy Harris.

Wireshark's failing to dissect the LAPD payload as DPNSS because it doesn't
currently have any reason to think that it should do so.

If there's an assignment (official or semi-official) of a LAPD SAPI of 17 to
DPNSS, that should be put into the epan/lapd_sapi.h file and the DPNSS
dissector should register itself in the "lapd.sapi" dissector table with that
SAPI.

If there is no assignment, so that Wireshark would have to be told that a given
call is using DPNSS, we'd need to add a preference to the DPNSS dissector to
handle that.

In either case, that's a separate bug from this one, so you should file a new
bug on that, and point to this bug for the capture files (which are useful both
for enhancing Wireshark's ability to read Aethra captures *and* enhancing its
ability to dissect DPNSS).

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