https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=4447
Summary: Endace ATM and AAL2 enhancements
Product: Wireshark
Version: SVN
Platform: Other
OS/Version: All
Status: NEW
Severity: Normal
Priority: Low
Component: Wireshark
AssignedTo: wireshark-bugs@xxxxxxxxxxxxx
ReportedBy: stephen@xxxxxxxxxx
Created an attachment (id=4245)
--> (https://bugs.wireshark.org/bugzilla/attachment.cgi?id=4245)
Endace ATM enhancement patch against svn 31765
Build Information:
wireshark 1.3.3 (SVN Rev 31761 from /trunk)
Copyright 1998-2010 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+ 2.18.3, with GLib 2.22.3, with libpcap 0.9-PRE-CVS, with
libz
1.2.3.3, with POSIX capabilities (Linux), with libpcre 7.8, without SMI,
without
c-ares, with ADNS, with Lua 5.1, without Python, with GnuTLS 2.8.3, with Gcrypt
1.4.4, with MIT Kerberos, with GeoIP, with PortAudio V19-devel (built Jun 20
2009 13:28:51), without AirPcap, with new_packet_list.
Running on Linux 2.6.31-16-generic, with libpcap version 0.9-PRE-CVS, GnuTLS
2.8.3, Gcrypt 1.4.4.
Built using gcc 4.4.1.
--
The ERF format has a number of different formats for ATM, including raw ATM
cells and two different AAL2 encapsulations (ERF_TYPE_MC_AAL2 and
ERF_TYPE_AAL2).
This patch improves decoding by dissecting the ERF AAL2 pseudo header and
calling the appropriate packet-atm dissectors.
Raw ATM cell decoding (ERF_TYPE_ATM) is also improved by calling the packet-atm
dissector with ATM_NO_HEC flag, allowing the ATM cell header to be dissected
correctly.
Packet-atm dissect_atm_cell() is extended with the ATM_NO_HEC flag to allow the
dissection of raw ATM cells without HEC present.
Packet-atm TRAF_UMTS_FP dissector is extended to support a new flag
ATM_AAL2_NOPHDR to dissect tvbs without the 'dct2000 pseudoheader'.
Discussion:
It would be useful to have a user preference to set/override the
pinfo->pseudo_header->atm.type and atm.subtype fields. This information is not
available in ERF files, so we must set e.g. TRAF_UNKNOWN, TRAF_ST_UNKNOWN
providing poor dissection.
This preference could be added in packet-erf or in packet-atm, which is most
appropriate?
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