| Bug ID |
12693
|
| Summary |
Small bug in Modbus (mbtcp.c/h) dissector exception information
|
| Product |
Wireshark
|
| Version |
2.3.x (Experimental)
|
| Hardware |
x86-64
|
| OS |
Windows 7
|
| Status |
UNCONFIRMED
|
| Severity |
Minor
|
| Priority |
Low
|
| Component |
Dissection engine (libwireshark)
|
| Assignee |
[email protected]
|
| Reporter |
[email protected]
|
Created attachment 14780 [details]
simple single pcap showing the wrong function code
Build Information:
Wireshark 2.3.0-128-g98e8b26 (v2.3.0rc0-128-g98e8b26 from master)
Copyright 1998-2016 Gerald Combs <[email protected]> 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 1.11.0, 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
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.
Intel(R) Core(TM)2 Quad CPU Q8300 @ 2.50GHz, with 8190MB of physical
memory.
Built using Microsoft Visual C++ 12.0 build 40629
--
there is a single Modbus exception response in the attached pcap
Modbus/TCP
Transaction Identifier: 0
Protocol Identifier: 0
Length: 3
Unit Identifier: 0
Function 8: Diagnostics. Exception: Illegal function
Function Code: Unknown (136) <== Wrong, should be also 8
Exception Code: Illegal function (1)
the execption bit does not get masked for the second Function Code-Output
should be 8 == (136 & 0x7F) - like one line above
You are receiving this mail because:
- You are watching all bug changes.