Ethereal-users: [Ethereal-users] Re: Plotting TCP Congetion Window evolution

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From: ronnie sahlberg <ronniesahlberg@xxxxxxxxx>
Date: Tue, 15 Nov 2005 04:42:47 -0400
No,


it is not possible using any tool.


the congestion window is an artificial limit imposed internally by the
TCP sender.
its size is not stored inside the packet.
neither is it possible to determine it by looking at a trace.


different implementations also use different/tweaked methods how they
manage the congestion window internally making it more difficult.



you really need to know the exact algorithms in great detail about the
exact specific implementation of the host sending the data in order to
be able to "guess" what the congestion window is set at at a specific
point in time.





On 11/15/05, Prasad Kularatne <kularatn@xxxxxxxxxx> wrote:
> Hi folks,
>
> Does anybody know whether it is possible to plot the TCP Congestion Window
> evolution using Ethereal?
>
> Please advise. Thanks.
>
> Good Luck!
> Prasad
>
>