Wireshark · Wireshark-bugs: [Wireshark-bugs] [Bug 2000] New: RTP Stream Analysis - Save Payload error with .enc files from Cisco

[bugzilla-daemon@xxxxxxxxxxxxx]

http://bugs.wireshark.org/bugzilla/show_bug.cgi?id=2000

           Summary: RTP Stream Analysis - Save Payload error with .enc files
                    from Cisco NAM
           Product: Wireshark
           Version: unspecified
          Platform: PC
        OS/Version: Windows XP
            Status: NEW
          Severity: Normal
          Priority: Medium
         Component: Wireshark
        AssignedTo: wireshark-bugs@xxxxxxxxxxxxx
        ReportedBy: carl@xxxxxx


Build Information:
Version 0.99.6a (SVN Rev 22276)

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+ 2.10.12, with GLib 2.12.12, 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 1, build 2600, with WinPcap version 4.0.1
(packet.dll version 4.0.0.901), based on libpcap version 0.9.5, without
AirPcap.

Built using Microsoft Visual C++ 6.0 build 8804

Wireshark is Open Source Software released under the GNU General Public
License.

Check the man page and http://www.wireshark.org for more information.
--
A problem has come up with RTP Stream Analysis - Save Payload.  I get the
following error when saving as either .raw or .au:

"can't save in a file: Wrong length of captured packets!"

We get our .enc files from CISCO Network Analysis Modules (NAM).  We just
started getting this error when we upgraded our NAMs to version V3.6.  NAM
version V3.4 and lower does not give the error.  

It's clear that Cisco has changed something in the way in write a .enc file,
however if I take a capture file the Wireshark chokes on and bring it into a
ClearSight product that I have, it can play back the audio, which tells me that
ClearSight is able to deal with what ever change Cisco made in the file format.

I have two small .enc files - one taken under V3.4 and one under V3.6 that I'd
like to send you to look at.

Regards, Carl Batchelder


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