Wireshark-bugs: [Wireshark-bugs] [Bug 7393] New: Dissector bug. ISO8073 COTP protocol - ED-TPDU
Date: Fri, 22 Jun 2012 06:06:49 -0700 (PDT)
https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=7393

           Summary: Dissector bug. ISO8073 COTP protocol - ED-TPDU data
                    part not always decoded
           Product: Wireshark
           Version: 1.6.8
          Platform: x86
        OS/Version: Windows XP
            Status: NEW
          Severity: Minor
          Priority: Low
         Component: Dissection engine (libwireshark)
        AssignedTo: [email protected]
        ReportedBy: [email protected]


Created attachment 8650
  --> https://bugs.wireshark.org/bugzilla/attachment.cgi?id=8650
Example Wireshark Trace file illustrating the above description

Build Information:
Version 1.6.8 (SVN Rev 42761 from /trunk-1.6)

Copyright 1998-2012 Gerald Combs <[email protected]> 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 GLib 2.28.8, with WinPcap (version
unknown), with libz 1.2.5, without POSIX capabilities, without libpcre, 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 May 22 2012), with AirPcap.

Running on Windows XP Service Pack 3, build 2600, 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 21022

--
The data part of an COTP ED-TPDU (Expedited Data TPDU) is not decoded.

In the attachments I have illustrated the case of an: 
ED-TDPU (Frame 1) that contains Data: 0703180101
and
ED-TDPU (Frame 4) that contains Data: 1903110105

These data elements are not being decoded as an SPDU (Session Protocol Data
Units)

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