https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=7670
Summary: dissector of Qos attribute "Reliability Class" in
GMM/SM message
Product: Wireshark
Version: 1.9.x (Experimental)
Platform: x86
OS/Version: Windows XP
Status: NEW
Severity: Minor
Priority: Low
Component: Dissection engine (libwireshark)
AssignedTo: bugzilla-admin@xxxxxxxxxxxxx
ReportedBy: ping.zhu@xxxxxxx
Created attachment 9008
--> https://bugs.wireshark.org/bugzilla/attachment.cgi?id=9008
Wireshark Trace in Iu interface.
Build Information:
Version 1.9.0-SVN-43268 (SVN Rev 43268 from /trunk)
Copyright 1998-2012 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 (32-bit) with GTK+ 2.24.10, with Cairo 1.10.2, with Pango 1.30.0, with
GLib 2.32.2, with WinPcap (4_1_2), with libz 1.2.5, without POSIX capabilities,
with SMI 0.4.8, with c-ares 1.7.1, with Lua 5.1, without Python, with GnuTLS
2.12.18, with Gcrypt 1.4.6, with MIT Kerberos, with GeoIP, with PortAudio
V19-devel (built Jun 14 2012), with AirPcap.
Running on Windows XP Service Pack 3, build 2600, with WinPcap version 4.1.2
(packet.dll version 4.1.0.2001), based on libpcap version 1.0 branch 1_0_rel0b
(20091008), GnuTLS 2.12.18, Gcrypt 1.4.6, without AirPcap.
Built using Microsoft Visual C++ 10.0 build 40219
--
It looks the dissector of QoS attribute "Reliability Class" was wrongly
referred to the definition of "Delay Class".
-----------------------
GSM A-I/F DTAP - Activate PDP Context Accept
Protocol Discriminator: GPRS session management messages
01.. .... = Sequence number: 1
DTAP GPRS Session Management Message Type: Activate PDP Context Accept
(0x42)
LLC Service Access Point Identifier - Negotiated LLC SAPI
Quality Of Service - Negotiated QoS
Length: 11
00.. .... = Spare bit(s): 0
..10 0... = Quality of Service Delay class: Delay class 4 (best effort)
(4)
.... .011 = Reliability class: Delay class 3 (3) <==========
1001 .... = Peak throughput: Up to 256 000 octet/s (9)
.... 0... = Spare bit(s): 0
.... .010 = Precedence class: Normal priority (2)
000. .... = Spare bit(s): 0
...1 1111 = Mean throughput: Best effort (31)
---------------------------
The constant was decleared in "packet-gsm_a_gm.c".
static const value_string gsm_a_qos_reliability_vals[] = {
{ 0x00, "Subscribed reliability class (in MS to network direction)" },
{ 0x01, "Acknowledged GTP, LLC, and RLC; Protected data" },
{ 0x02, "Unacknowledged GTP, Ack LLC/RLC, Protected data" },
{ 0x03, "Unacknowledged GTP/LLC, Ack RLC, Protected data" },
{ 0x04, "Unacknowledged GTP/LLC/RLC, Protected data" },
{ 0x05, "Unacknowledged GTP/LLC/RLC, Unprotected data" },
{ 0x07, "Reserved" },
{ 0, NULL }
--
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