From mboxrd@z Thu Jan  1 00:00:00 1970
From: Patrick McHardy <kaber@trash.net>
Date: Mon, 02 May 2005 21:14:53 +0000
Subject: Re: [LARTC] How to read the TCP congestion window (cwnd) on Linux?
Message-Id: <4276984D.7070004@trash.net>
List-Id: <lartc.vger.kernel.org>
References: <427661C9.4080507@iit.cnr.it>
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To: lartc@vger.kernel.org

Antonio Pinizzotto wrote:
> 
> Hi everybody.
> Do you know about any way to read the TCP cwnd value (congestion window)
> on Linux?
> 
> I have read that on Linux it is not possible to enable a socket option
> (to read to cwnd using the program trpt).
> 
> Any way to read the cwnd would be good for me.

I already answered your question on the end2end list yesterday:
You can get cwnd through the TCP socket monitoring interface using the
"ss"-tool from iproute2 (http://developer.osdl.org/dev/iproute2) or by
getsockopt(TCP_INFO).

Regards
Patrick
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