Wireshark-bugs: [Wireshark-bugs] [Bug 13084] New: field sna.gds is is not of an FT_{U}INTn type]
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From: bugzilla-daemon@xxxxxxxxxxxxx
Date: Wed, 02 Nov 2016 07:22:10 +0000
Bug ID 13084
Summary field sna.gds is is not of an FT_{U}INTn type]
Product Wireshark
Version 2.3.x (Experimental)
Hardware x86
OS Windows 7
Status UNCONFIRMED
Severity Minor
Priority Low
Component Dissection engine (libwireshark)
Assignee bugzilla-admin@wireshark.org
Reporter mgburkhar@gmail.com 

Created attachment 15035 [details]
sample capture showing 2 packets with a SNA GDS 12CE Variable RSETUP

Build Information:
Version 2.3.0-1346-g959b13b (v2.3.0rc0-1346-g959b13b from master)

Copyright 1998-2016 Gerald Combs <gerald@wireshark.org> and contributors.
License GPLv2+: GNU GPL version 2 or later
<http://www.gnu.org/licenses/old-licenses/gpl-2.0.html>
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 (64-bit) with Qt 5.6.1, with WinPcap (4_1_3), with GLib 2.42.0, with
zlib 1.2.8, with SMI 0.4.8, with c-ares 1.12.0, with Lua 5.2.4, with GnuTLS
3.2.15, with Gcrypt 1.6.2, with MIT Kerberos, with GeoIP, with nghttp2 1.14.0,
with LZ4, with Snappy, with QtMultimedia, with AirPcap.

Running on 64-bit Windows 7 Service Pack 1, build 7601, with Intel Core
Processor (Broadwell) (with SSE4.2), with 4095 MB of physical memory, with
locale German_Germany.1252, with WinPcap version 4.1.3 (packet.dll version
4.1.0.2980), based on libpcap version 1.0 branch 1_0_rel0b (20091008), with
GnuTLS 3.2.15, with Gcrypt 1.6.2, without AirPcap.

Built using Microsoft Visual C++ 12.0 build 40629
--
Dissector bug, protocol SNA: proto.c:9114: field sna.gds is not of an
FT_{U}INTn type 

-
The GDS Variables are described in  SNA Formats 
http://www.retrocomputing.net/info/doc/GA27-3136-20_SNA_Formats.pdf

Route Setup (X'12CE') GDS Variable
Byte   Bit   Content
0–1          Length (n+1), in binary, of the GDS variable, 
                           including the Length field
2–3          Key: X'12CE'
4–n          GDS Variable Data
4
       0   Type:
            0 request
            1 reply (positive or negative)
       1   Path switch indicator (set on a request; reserved on a reply):
            0 request not triggered by a path switch
            1 request triggered by a path switch       
       2–3 ARB mode - indicates the mode of ARB protocol supported by
            the Route Setup reply sender. This field is only meaningful 
            on a positive Route Setup reply.
            00 Base mode ARB
            01 Responsive mode ARB
       4–7 Reserved

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