Wireshark · Wireshark-bugs: [Wireshark-bugs] [Bug 4186] New: packet-dcm, dissection not reliable when DICOM packets are not with

[bugzilla-daemon@xxxxxxxxxxxxx]

https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=4186

           Summary: packet-dcm, dissection not reliable when DICOM packets
                    are not within the first few captured packtes
           Product: Wireshark
           Version: SVN
          Platform: All
        OS/Version: Windows XP
            Status: NEW
          Severity: Major
          Priority: Medium
         Component: Wireshark
        AssignedTo: wireshark-bugs@xxxxxxxxxxxxx
        ReportedBy: david_aggeler@xxxxxxxxxx


Build Information:
Version 1.3.1-DICOM-Edition-V4.6-

Copyright 1998-2009 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 with GTK+ 2.16.6, with GLib 2.20.5, with WinPcap (version unknown),
with libz 1.2.3, without POSIX capabilities, with libpcre 7.0, with SMI 0.4.8,
with c-ares 1.6.0, with Lua 5.1, without Python, with GnuTLS 2.8.1, with Gcrypt
1.4.4, with MIT Kerberos, with GeoIP, with PortAudio V19-devel (built Oct 17
2009), with AirPcap, with new_packet_list.

Running on Windows XP Service Pack 3, build 2600, with WinPcap version 4.0.2
(packet.dll version 4.0.0.1040), based on libpcap version 0.9.5, GnuTLS 2.8.1,
Gcrypt 1.4.4, without AirPcap.

Built using Microsoft Visual C++ 9.0 build 30729

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

Check the man page and http://www.wireshark.org for more information.
--

When the DICOM traffic is not within the displayed first packets, or when user
jumps to a particular packet using goto (not scrolling), the packets show up as
invalid.

This is because packet-dcm does not handle tree=NULL correctly, and the data
structures are not initialized in the correct sequence.

Workaround for the time being, filter the capture to have just the desired
DICOM stream it. And scroll through the packets rather than a direct
navigation.

Fix to be submitted soon.


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