Wireshark-bugs: [Wireshark-bugs] [Bug 12374] New: Suppoprt Modbus/UDP
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From: bugzilla-daemon@xxxxxxxxxxxxx
Date: Tue, 26 Apr 2016 15:11:08 +0000
Bug ID 12374
Summary Suppoprt Modbus/UDP
Product Wireshark
Version unspecified
Hardware All
OS All
Status UNCONFIRMED
Severity Enhancement
Priority Low
Component GTK+ UI
Assignee bugzilla-admin@wireshark.org
Reporter sinnerbofh@gmail.com 

Build Information:
Version 2.0.3 (v2.0.3-0-geed34f0 from master-2.0)

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 5.3.2, with WinPcap (4_1_3), with libz 1.2.8, with
GLib 2.42.0, with SMI 0.4.8, with c-ares 1.9.1, with Lua 5.2, with GnuTLS
3.2.15, with Gcrypt 1.6.2, with MIT Kerberos, with GeoIP, with QtMultimedia,
with AirPcap.

Running on 64-bit Windows 7 Service Pack 1, build 7601, with locale C, 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.
       Intel(R) Core(TM) i7-3520M CPU @ 2.90GHz (with SSE4.2), with 8124MB of
physical memory.


Built using Microsoft Visual C++ 12.0 build 40629

Wireshark is Open Source Software released under the GNU General Public
License.

Check the man page and http://www.wireshark.org for more information.
--
Please bring back support for Modbus/UDP (basically, Modbus RTU encapsulated
inside UDP frames).

This support was already included in older WireShark versions: see
https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=3073 

Now there's no support for Modbus/UDP.

For example:

* Here's a complete HEX stream sample:
000de0303ddc00304fb52b1b08004500002200004000ff1165a60a0001220a00010301f601f6000e12fd01010162d061000000000000000000000000

* Here's the IPv4 envelop: 
0000   45 00 00 22 00 00 40 00 ff 11 65 a6 0a 00 01 22 
0010   0a 00 01 03

* Here's the UDP envelop: 
0000   01 f6 01 f6 00 0e 12 fd

* here's a Modbus UPD message: 
0000   01 01 01 62 d0 61

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