https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=3654
Summary: ANSI ISUP Cause indicators with coding standard=ANSI
fail to dissect.
Product: Wireshark
Version: 1.2.0
Platform: Other
OS/Version: All
Status: NEW
Severity: Normal
Priority: Low
Component: Wireshark
AssignedTo: wireshark-bugs@xxxxxxxxxxxxx
ReportedBy: mlashley@xxxxxxxxx
Created an attachment (id=3246)
--> (https://bugs.wireshark.org/bugzilla/attachment.cgi?id=3246)
REL with ANSI coding standard (fails to decode)
Build Information:
aragorn ~ # wireshark -v
wireshark 1.2.0
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+ 2.14.7, with GLib 2.20.2, with libpcap 1.0.0, with libz
1.2.3, with POSIX capabilities (Linux), with libpcre 7.8, with SMI 0.4.8,
without c-ares, without ADNS, with Lua 5.1, without GnuTLS, without Gcrypt,
with
MIT Kerberos, without GeoIP, without PortAudio, without AirPcap.
Running on Linux 2.6.28-gentoo-r2, with libpcap version 1.0.0.
Built using gcc 4.3.3.
--
ISUP dissector - When decoding cause indicators parameter for ANSI - and the
coding standard is 0x2 (ANSI) and not 0x0 (CCITT) - the current code steps
forward an octet too far before extracting the cause value - causing the
dissector to fail.
In dissect_ansi_isup_cause_indicators_parameter()
The case 0: and case 2: can be seen to differ whereby the line that extracts
the cause value appears respectively before and after an offset++; length--.
In each case - the cause_value=tvb_get_guint8(parameter_tvb, offset)&0x7f;
should appear before offset++.
Attaching example packets (set MTP3 preference to ANSI) for the CCITT and ANSI
coding standard case - the latter fails to decode due to the above.
--
Configure bugmail: https://bugs.wireshark.org/bugzilla/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are the assignee for the bug.
