http://bugs.wireshark.org/bugzilla/show_bug.cgi?id=1842
Summary: TCP window size incorrect when conversation filter
applied.
Product: Wireshark
Version: SVN
Platform: PC
OS/Version: All
Status: NEW
Severity: Normal
Priority: Medium
Component: Wireshark
AssignedTo: wireshark-bugs@xxxxxxxxxxxxx
ReportedBy: christopher.maynard@xxxxxxxxx
Build Information:
SVN 22858
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The TCP window size, as displayed in the Info column for SYN-ACK packets, is
incorrect if a TCP conversation filter is applied. This can easily be seen
using the small 3 packet trace file I will attach. If you open the file with
no filter applied, the correct unscaled window size of 5792 is reported;
however, you right-click and choose "Conversation Filter -> TCP", then the
window size is incorrectly reported as 2965504, which means that the scaling
factor of 9 (multiply by 512) is incorrectly being applied. As you probably
already know, the scaling factor should never be applied to window sizes for
SYN or SYN-ACK packets. If you didn't know that, then refer to the last
paragraph of section 2.2 in RFC1323, available here:
http://www.ietf.org/rfc/rfc1323.txt
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