https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=5011
Summary: Window Size not shown in Decode for SYN packets
Product: Wireshark
Version: 1.4.0
Platform: x86-64
OS/Version: Windows 7
Status: NEW
Severity: Normal
Priority: Low
Component: Wireshark
AssignedTo: wireshark-bugs@xxxxxxxxxxxxx
ReportedBy: jasper.bongertz@xxxxxxxxxxxx
Build Information:
Version 1.4.0rc1 (SVN Rev 33190 from /trunk-1.4)
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 Jun
9 2010), with AirPcap.
Running on 64-bit Windows 7, build 7600, with WinPcap version 4.1.1 (packet.dll
version 4.1.0.1753), 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.
--
Wireshark doesn't show the TCP window size for SYN packets in the decode pane,
while it is still shown in the info column of the packet list. The window size
is shown in all further packets; just the SYN packet has no decode for that
value while it is also visible in the hex code.
I checked this behaviour using 32bit and 64bit versions of Wireshark 1.4, and
tested also tshark and if the window scaling option has anything to do with it,
but the window size is always missing in SYN packets. Checked my test trace
against 1.2.9 stable, and the window size is decoded just fine.
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