Wireshark-bugs: [Wireshark-bugs] [Bug 5548] Missing out of order detection
Date: Wed, 5 Jan 2011 07:17:19 -0800 (PST)
https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=5548

Chris Maynard <[email protected]> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |INVALID

--- Comment #1 from Chris Maynard <[email protected]> 2011-01-05 07:17:17 PST ---
It isn't out of order.  It's an ACK to the data sent in frame 3.

In this capture file, let A = 10.147.1.19 and B = 10.2.7.187. Then:

Frame    1: A sends 13 bytes to B: seq=1, ack=1, len=13
            (next expected seq=14, as can be seen later on in frame 9)
Frame    2: B ACK's the 13 bytes from A: seq=20320, ack=14, len=0
Frames 3-8: B sends a combined 8709 bytes to A: seq=27585, ack=14, len=1444
            (next expected seq=29029, as can be seen later on in frame 11)
Frame    9: A sends 15 bytes to B: seq=14, ack=1, len=15
            (next expected seq=29, as can be seen later on in frame 12)
Frame   10: A ACK's the 1460 bytes sent from B in frame 3: seq=1, ack=1461,
len=0

... and so forth.

To me there does appear to be a bug here in frame 10, but it's not with
Wireshark.  The bug appears to be with the sender as the seq # should have been
14, not 1.

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