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Wireshark-bugs: [Wireshark-bugs] [Bug 6178] New: [BACnet] ReadPropertyMultiple-ACK not correctly

Date: Fri, 29 Jul 2011 00:30:50 -0700 (PDT)
https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=6178

           Summary: [BACnet] ReadPropertyMultiple-ACK not correctly
                    dissected
           Product: Wireshark
           Version: 1.6.1
          Platform: x86
        OS/Version: Windows XP
            Status: NEW
          Severity: Normal
          Priority: Low
         Component: Wireshark
        AssignedTo: bugzilla-admin@xxxxxxxxxxxxx
        ReportedBy: nuabaranda@xxxxxx


Created an attachment (id=6742)
 --> (https://bugs.wireshark.org/bugzilla/attachment.cgi?id=6742)
ReadPropertyMultiple request and ill-dissected ACK

Build Information:
Version 1.6.1 (SVN Rev 38096 from /trunk-1.6)

Compiled (32-bit) with GTK+ 2.22.1, with GLib 2.26.1, with WinPcap (version
unknown), with libz 1.2.5, without POSIX capabilities, without libpcre, with
SMI
0.4.8, with c-ares 1.7.1, with Lua 5.1, without Python, with GnuTLS 2.10.3,
with
Gcrypt 1.4.6, with MIT Kerberos, with GeoIP, with PortAudio V19-devel (built
Jul
18 2011), 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 2.10.3, Gcrypt 1.4.6, without AirPcap.

Built using Microsoft Visual C++ 9.0 build 21022
--
The dissection of a ReadPropertyMultiple-ACK packet sometimes fails (see the
attached packet dump). The request is for the effective-period, weekly-schedule
and exception-schedule properties of 2 Schedule objects. As can be seen the
dissection fails after the first object. 

When trying to analyse the problem with VTS I noticed that when adding some
exception-schedule entries to the first Schedule object the error starts to
show. In general VTS correctly dissects the ACK.

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