Wireshark-bugs: [Wireshark-bugs] [Bug 1432] New: Wireshark can not decode H248 over TCP.

Date: Sat, 10 Mar 2007 15:29:01 +0000 (GMT)
http://bugs.wireshark.org/bugzilla/show_bug.cgi?id=1432

           Summary: Wireshark can not decode H248 over TCP.
           Product: Wireshark
           Version: 0.99.5
          Platform: PC
        OS/Version: Windows XP
            Status: NEW
          Severity: Major
          Priority: Medium
         Component: Wireshark
        AssignedTo: wireshark-bugs@xxxxxxxxxxxxx
        ReportedBy: krisztian.papp@xxxxxxxxx


Build Information:
wireshark 0.99.5 (SVN Rev 20677)

Copyright 1998-2007 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 with GTK+ 2.10.7, with GLib 2.12.7, with WinPcap (version unknown),
with libz 1.2.3, with libpcre 6.4, with Net-SNMP 5.4, with ADNS, with Lua 5.1,
with GnuTLS 1.6.1, with Gcrypt 1.2.3, with MIT Kerberos, with PortAudio
PortAudio V19-devel, with AirPcap.

Running on Windows XP Service Pack 2, build 2600, with WinPcap version 4.0
(packet.dll version 4.0.0.755), based on libpcap version 0.9.5, without
AirPcap.


Built using Microsoft Visual C++ 6.0 build 8804
--
Hi!

Wireshark can not decode H248 over TCP.

If the H248 is on top of SCTP then I can apply a decoder. (It does not decode
automatically, but it works manualy...)
If the H248 is on top of TCP then there is need TPKT between them, and I try to
apply some decoder (H248, MEGACO, MGCP, TPKT), but they are not work.
As I know the TPKT should be selected in this case, but it recognise some other
kind of protocol (COTP) not H248.

Maybe there is 2 ways to correct it:
- TPKT should be modified to handle H248 correctly, or
- Can be WireShark modified to the user can set the protocol hierarchy manualy
and not just the Link, Network, Transport, but more and more "tunnelled"
protocols.


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