http://bugs.wireshark.org/bugzilla/show_bug.cgi?id=1538
Summary: GSM_MAP dissector decodes user-level SEGMENTED MAPv3
SendRoutingInfo incorrectly
Product: Wireshark
Version: 0.99.5
Platform: PC
OS/Version: Windows XP
Status: NEW
Severity: Major
Priority: Low
Component: Wireshark
AssignedTo: wireshark-bugs@xxxxxxxxxxxxx
ReportedBy: igor.lobiv@xxxxxxxxx
Build Information:
wireshark 0.99.5 (SVN Rev 20677)
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+ 2.10.7, with GLib 2.12.7, 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 2, build 2600, with WinPcap version 3.1
(packet.dll version 3, 1, 0, 27), based on libpcap version 0.9[.x], without
AirPcap.
Built using Microsoft Visual C++ 6.0 build 8804
--
The maximum size of SCCP.UDT message is the operator specific.
For some practical reasons most vendors have max SCCP.UDT size limit 250 - 300
bytes.
If message size exceeds the limit, next possibility is used:
1. Segmentation on SCCP level
- send one UDT as a number of (segmented) XUDT (eXtended UDT)
- use LUDT (Long UDT)
2. Segmentation on TCAP-User Level,
example: one TC_CONTINUE with embeded one big TC_LAST_RESULT divides to
number of TC_CONTINUE with embeded small TC_NOT_LAST_RESULT
In the bug report I use "Segmentation on TCAP-User Level".
The SendRoutingInfo (in this log) logically is divided to the
- T-CSI (Terimating-CSI) and other info (IMSI, Subscriber info)
- O-CSI (Originating-Camel-Subscription-Info)
- O-CSI Criteria
in the SRI_MAPSegmented_Textronix_K1297.txt you can see the same log
which is decoded by other tool.
text2pcap.txt - this log in format for text2pcap tool
use: text2pcap.exe -l 140 -o hex -t %H:%M:%S. text2pcap.txt 1111.pcap
1111.pcap - wireshark log
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