Ethereal-users: Re: [Ethereal-users] TCP Window Scaling

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From: Guy Harris <guy@xxxxxxxxxx>
Date: Tue, 29 May 2001 11:55:01 -0700 (PDT)
> I'am testing TCP Extentions for High Performance , I set the option
> tcp_window_scaling to the value true, but with ETHEREAL i see that the
> maximum size of TCP window is always 65 KBytes.

Ethereal's TCP dissector doesn't currently record, as information
attached to a TCP connection, an indication of whether TCP window
scaling is in effect or not or what the scaling factor is.

Thus, it can only report the raw numerical value of the window size, not
the scaled value.

(And even if it *did* record that information when it was available,
there would be no guarantee that a capture would contain a frame with
the TCP Window Scale option in it, so there would be no guarantee that
Ethereal would even *know* that TCP window scaling was in effect for
that particular connection, and thus there would be no guarantee that
Ethereal could record that information.)