https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=3452
Summary: GSM DTAP: incorrect display of Suppl. Service Message
Type in SVN revision 28281
Product: Wireshark
Version: SVN
Platform: x86
OS/Version: SuSE
Status: NEW
Severity: Normal
Priority: Low
Component: Wireshark
AssignedTo: wireshark-bugs@xxxxxxxxxxxxx
ReportedBy: rspmn@xxxxxxxx
Created an attachment (id=2982)
--> (https://bugs.wireshark.org/bugzilla/attachment.cgi?id=2982)
Sample .pcap
Build Information:
wireshark 1.0.7
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+ 2.14.4, with GLib 2.18.2, with libpcap 0.9-PRE-CVS, with
libz
1.2.3, without POSIX capabilities, with libpcre 7.8, without SMI, without ADNS,
with Lua 5.1, with GnuTLS 2.4.1, with Gcrypt 1.4.1, without Kerberos, without
PortAudio, without AirPcap.
Running on Linux 2.6.27.21-0.1-pae, with libpcap version 0.9-PRE-CVS.
Built using gcc 4.3.2 [gcc-4_3-branch revision 141291].
vs.
SVN revision 28281.
--
A Supplementary Service message (PD 11) which contains a non-zero sequence
number (like the Register from the attached .pcap below, decode User DLT 0
as gsm_a_dtap) is displayed correctly by Wireshark 1.0.7 as
Protocol Discriminator: Non call related SS messages
0... .... : TI flag: allocated by sender
.001 .... : TIO: 1
.... 1011 = Protocol discriminator: Non call related SS messages (11)
Message Type Register
Facility
while it is displayed by Wireshark SVN revision 28281 as
Protocol Discriminator: Non call related SS messages
0... .... : TI flag: allocated by sender
.001 .... : TIO: 1
.... 1011 = Protocol discriminator: Non call related SS messages (11)
DTAP Non call Supplementary Service Message Type: Unknown (0xbb)
Facility
as the sequence number handling does not seem to be performed for PD 11.
With the proposed patch below the same message is displayed as:
Protocol Discriminator: Non call related SS messages
0... .... : TI flag: allocated by sender
.001 .... : TIO: 1
.... 1011 = Protocol discriminator: Non call related SS messages (11)
10.. .... = Sequence number: 2
..11 1011 = DTAP Non call Supplementary Service Message Type: Register
(0x3b)
Facility
--
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