Wireshark-bugs: [Wireshark-bugs] [Bug 6371] New: Add support for the osmo extension header to IP
Date: Thu, 22 Sep 2011 01:34:00 -0700 (PDT)

           Summary: Add support for the osmo extension header to IP.a
           Product: Wireshark
           Version: SVN
          Platform: Other
        OS/Version: All
            Status: NEW
          Severity: Enhancement
          Priority: Low
         Component: Wireshark
        AssignedTo: [email protected]
        ReportedBy: [email protected]

Created an attachment (id=7066)
 --> (https://bugs.wireshark.org/bugzilla/attachment.cgi?id=7066)
Adds support for the OSMO extension header

Build Information:
wireshark 1.7.0 (SVN Rev 39031 from /trunk)

Copyright 1998-2011 Gerald Combs <[email protected]> and contributors.
This is free software; see the source for copying conditions. There is NO

Compiled (64-bit) with GTK+ 2.24.4, with Cairo 1.10.2, with Pango 1.28.4, with
GLib 2.28.8, with libpcap 1.1.1, with libz 1.2.5, with POSIX capabilities
(Linux), with threads support, without SMI, without c-ares, without ADNS, with
Lua 5.1, with Python 2.6.6, with GnuTLS 2.10.5, with Gcrypt 1.4.6, without
Kerberos, without GeoIP, with PortAudio V19-devel (built Apr  7 2010), without

Running on Linux 3.0.0, with locale en_US.UTF-8, with libpcap version 1.1.1,
with libz 1.2.5, GnuTLS 2.10.5, Gcrypt 1.4.6.

Built using gcc 4.4.5.
The OpenBSC project is an open source implementation of a GSM Base Station
Controller. It is using the IP.a protocol for more than just transporting GSM
frames. These patches add support for decoding the osmo extension header and
the control protocol contained within. Other protocols within OSMO_EXT can
register as a subdissector. The control protocol is not decoded in a
subdissector since it is really simple for now (just displays the payload as

The last patch adds support to automatically assume TCP connections on port
4249 and 4250 contain IP.a messages. These are the default ports for the
openbsc programs (osmo-bsc and osmo-bsc_nat) to listen to control connections.

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