Wireshark-bugs: [Wireshark-bugs] [Bug 4171] New: Improve packet loss detection in for MPEG2 Tran
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From: bugzilla-daemon@xxxxxxxxxxxxx
Date: Wed, 28 Oct 2009 04:05:10 -0700 (PDT)
https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=4171

           Summary: Improve packet loss detection in for MPEG2 Transport
                    Streams (packet-mp2t.c)
           Product: Wireshark
           Version: SVN
          Platform: Other
        OS/Version: Linux (other)
            Status: NEW
          Severity: Normal
          Priority: Medium
         Component: Wireshark
        AssignedTo: wireshark-bugs@xxxxxxxxxxxxx
        ReportedBy: jdb@xxxxxxx



Jesper Dangaard Brouer <jdb@xxxxxxx> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Attachment #3853|                            |review_for_checkin?
               Flag|                            |


Created an attachment (id=3853)
 --> (https://bugs.wireshark.org/bugzilla/attachment.cgi?id=3853)
Calculate number of skipped TS frames each time a discontinuity occur.

Build Information:
wireshark 1.3.1

Copyright 1998-2009 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+ 2.16.1, with GLib 2.20.1, with libpcap 1.1-PRE-CVS, with
libz
1.2.3.3, without POSIX capabilities, without libpcre, without SMI, without
c-ares, without ADNS, without Lua, without Python, without GnuTLS, without
Gcrypt, without Kerberos, without GeoIP, without PortAudio, without AirPcap,
with new_packet_list.
NOTE: this build doesn't support the "matches" operator for Wireshark filter
syntax.

Running on Linux 2.6.32-rc3-net-next-dev-mp2t, with libpcap version
1.1-PRE-CVS.

Built using gcc 4.3.3.
--

File: epan/dissectors/packet-mp2t.c

This patch set improves packet loss detection in for MPEG2 Transport Streams
(RFC 2250 / ISO/IEC 13818-1).

I'm the author of the current packet loss detection...


This patchset contains two patches.

1. Improve loss detection by counting skipped TS frames (currently we only
detect a drop). (only store the info globally)

2. Introduce an analysis tree and record/count the info per TS frame.


I'm using git+stgit and is working off SVN r30558, the last change to
packet-mp2t.c were at r28770 (checked at r30746).


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