Wireshark-bugs: [Wireshark-bugs] [Bug 3227] New: Implement packet loss detection in for MPEG2 Tr
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From: bugzilla-daemon@xxxxxxxxxxxxx
Date: Wed, 28 Jan 2009 04:48:36 -0800 (PST)
https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=3227

           Summary: Implement packet loss detection in for MPEG2 Transport
                    Streams
           Product: Wireshark
           Version: SVN
          Platform: PC
        OS/Version: All
            Status: NEW
          Severity: Enhancement
          Priority: Low
         Component: Wireshark
        AssignedTo: wireshark-bugs@xxxxxxxxxxxxx
        ReportedBy: jdb@xxxxxxx


Build Information:
./wireshark -v
wireshark 1.1.2

Copyright 1998-2008 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+ 2.12.11, with GLib 2.16.6, with libpcap 0.9.8, with libz
1.2.3.3, without POSIX capabilities, without libpcre, without SMI, without
c-ares, without ADNS, without Lua, without GnuTLS, without Gcrypt, without
Kerberos, without GeoIP, without PortAudio, without AirPcap.
NOTE: this build doesn't support the "matches" operator for Wireshark filter
syntax.

Running on Linux 2.6.28-rc7-amd64, with libpcap version 0.9.8.

Built using gcc 4.3.2.
--
This patchset implements packet loss detection in a MPEG2 Transport
Streams (RFC 2250 / ISO/IEC 13818-1).

First patch, is a general fix, that does exception handling for
call_dissector(), as an exception during processing of TS packets
would cause processing to stop of the remaining TS packets.  That
would look like CC drops to the next patch.

Second patch, implements the packet loss detection. Packet loss is
detected by looking for gaps in the CC value (per pid) in the TS
subpackets. The filter is defined as a flag value, named
"mp2t.cc.drop".


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