https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=5235
Summary: tcp.len (TCP Segment Len) is smaller than should be
Product: Wireshark
Version: 1.5.x (Experimental)
Platform: x86-64
OS/Version: Windows 7
Status: NEW
Severity: Minor
Priority: Low
Component: TShark
AssignedTo: wireshark-bugs@xxxxxxxxxxxxx
ReportedBy: boaz.brickner@xxxxxxxxx
Created an attachment (id=5176)
--> (https://bugs.wireshark.org/bugzilla/attachment.cgi?id=5176)
A packet example pcap file with the descripted problem
Build Information:
Version 1.5.0-SVN-34080 (SVN Rev 34080 from /trunk)
Copyright 1998-2010 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, (64-bit) with GLib 2.22.4, with WinPcap (version
unknown), with libz 1.2.3, without POSIX capabilities, without libpcre, without
SMI, with c-ares 1.7.1, with Lua 5.1, without Python, with GnuTLS 2.8.5, with
Gcrypt 1.4.5, without Kerberos, with GeoIP, with PortAudio V19-devel (built Sep
8 2010), with AirPcap.
Running on 64-bit Windows 7, build 7600, 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 2.8.5, Gcrypt 1.4.5, 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.
--
Hi.
While testing Pcap.Net (http://pcapdot.net), I've found this bug in tshark:
I use tshark on a pcap file using these arguments:
-o udp.check_checksum:TRUE
-o tcp.relative_sequence_numbers:FALSE
-o tcp.analyze_sequence_numbers:FALSE
-o tcp.track_bytes_in_flight:FALSE
-o tcp.desegment_tcp_streams:FALSE
-o tcp.check_checksum:TRUE
-o ttp.dechunk_body:FALSE
-t r -n -r "filename.pcap" -T pdml
The pdml file I get for specific packets has a smaller tcp.len than what I
expect.
In the attached pcap file there is one packet that if opened by Wireshark we
can see that the TCP layer takes 16 bytes.
However, when I run tshark on it I get a pdml file with tcp.len of 12 bytes.
Thank you,
Boaz.
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