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Subject: Re: TCP header bits set in reserved space
To: mes@capelazo.com (Mark Sutton)
Date: Thu, 30 Nov 2000 16:05:54 +0000 (GMT)
Cc: linux-kernel@vger.kernel.org
In-Reply-To: <Pine.GSO.4.10.10011292033380.27791-100000@lazo.capelazo.com> from "Mark Sutton" at Nov 29, 2000 08:53:32 PM
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From: Alan Cox <alan@lxorguk.ukuu.org.uk>
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> 	I can't seem to find this mentioned anywhere. My 2.4 machine
> sets 2 bits in the TCP header between the 4 data offset bits and control 
> flags. Like so:

ECN

> can see from one that is are these two bits. RFC793 says they must be zero.
> Is 793 still current? Has anyone else seen this?

793 is still current but remember bits of it are superceded by a couple of 
thousand other documents.

Alan

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