Wireshark-bugs: [Wireshark-bugs] [Bug 4810] New: PPP/USB dissector should probably register on I
https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=4810

           Summary: PPP/USB dissector should probably register on
                    IF_CLASS_CDC_DATA
           Product: Wireshark
           Version: SVN
          Platform: Other
        OS/Version: All
            Status: NEW
          Severity: Enhancement
          Priority: Low
         Component: Wireshark
        AssignedTo: [email protected]
        ReportedBy: [email protected]


Build Information:
Version 1.3.6-SVN-33021 (SVN Rev 33021 from /trunk)

Copyright 1998-2010 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 with GTK+ 2.16.6, (32-bit) with GLib 2.22.4, with WinPcap (version
unknown), with libz 1.2.3, without POSIX capabilities, without libpcre, with
SMI
0.4.8, with c-ares 1.7.1, with Lua 5.1, without Python, with GnuTLS 2.8.5, with
Gcrypt 1.4.5, with MIT Kerberos, with GeoIP, with PortAudio V19-devel (built
May
30 2010), with AirPcap, with new_packet_list.

Running on Windows XP Service Pack 3, build 2600, with WinPcap version 4.1.1
(packet.dll version 4.1.0.1753), based on libpcap version 1.0 branch 1_0_rel0b
(20091008), GnuTLS 2.8.5, Gcrypt 1.4.5, without AirPcap.

Built using Microsoft Visual C++ 9.0 build 30729

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

Check the man page and http://www.wireshark.org for more information.
--
>From what I can determine, the PPP/USB dissector should register on
IF_CLASS_CDC_DATA (0x0a) - in addition to IF_CLASS_UNKNOWN and
IF_CLASS_VENDOR_SPECIFIC, for those rare occasions that the right set of
circumstances arise where PPP traffic will be (correctly) encapsulated in a USB
frame of that interface class.

A case in point being a fairly large trace file that I have, containing traffic
from a session between a WAP/MMS Gateway, a Windows-based client, and a mobile
phone. 

Unfortunately, if I attempt to extract the set of frames containing that
traffic to a new file, they become frames of interface type "Vendor Specific" -
so they're a poor demonstration of that phenomenon. (But that's another matter
altogether).

Thanks in advance.

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