Wireshark-bugs: [Wireshark-bugs] [Bug 7763] New: Megaco protocol incorrect dissecting criteria
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From: bugzilla-daemon@xxxxxxxxxxxxx
Date: Thu, 27 Sep 2012 02:12:57 -0700 (PDT)
https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=7763

           Summary: Megaco protocol incorrect dissecting criteria
           Product: Wireshark
           Version: SVN
          Platform: x86-64
        OS/Version: Windows 7
            Status: NEW
          Severity: Major
          Priority: Low
         Component: Dissection engine (libwireshark)
        AssignedTo: bugzilla-admin@xxxxxxxxxxxxx
        ReportedBy: mtwire@xxxxxxxxxx


Created attachment 9240
  --> https://bugs.wireshark.org/bugzilla/attachment.cgi?id=9240
Sample TPKT - Q.931 - H.225

Build Information:
Version 1.9.0 (SVN Rev Unknown from unknown)

Copyright 1998-2012 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+ 2.24.10, with Cairo 1.10.2, with Pango 1.30.0, with
GLib 2.32.2, with WinPcap (4_1_2), with libz 1.2.5, without POSIX capabilities,
without libnl, with SMI 0.4.8, with c-ares 1.7.1, with Lua 5.1, without Python,
with GnuTLS 2.12.18, with Gcrypt 1.4.6, with MIT Kerberos, with GeoIP, with
PortAudio V19-devel (built Sep 27 2012), with AirPcap.

Running on 64-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 2.12.18, Gcrypt 1.4.6, without AirPcap.

Built using Microsoft Visual C++ 9.0 build 30729

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

Check the man page and http://www.wireshark.org for more information.
--
The sample file contain one packet of Avaya IP Phone signaling (H.323). Because
the destination port is 2944 this packet is dissecting as Megaco protocol but
this is incorrect. I do not know Megaco protocol, so I does not undertake to
correct it. Sample packet contain: TPKT - Q.931 - H.225.

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