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Re: [tcpm] TCP port names option ID

Wesley Eddy <weddy@grc.nasa.gov> Mon, 17 April 2006 13:36 UTC

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Date: Mon, 17 Apr 2006 09:34:16 -0400
From: Wesley Eddy <weddy@grc.nasa.gov>
To: Tim Shepard <shep@alum.mit.edu>
Subject: Re: [tcpm] TCP port names option ID
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On Sat, Apr 15, 2006 at 11:21:51PM -0400, Tim Shepard wrote:
> 
> What about the TCP Sack-Permitted Option which is 2 bytes long?  (And
> is very common on TCP SYN packets these days.)  If you add that to the
> list, we're down to 3 bytes for the NAMESTRING, which is only one byte
> more than the 16-bit port number that we started with.
> 
> In any case, it seems if we go forward with this, it will be the last
> option we can add to the TCP SYN packet without breaking something, as
> we will have (in some cases) completely used up all space for a TCP
> option.  So before we go forward with this, we should make sure we
> really want to do that.
> 

Or reconsider things like:
http://www.potaroo.net/ietf/all-ids/draft-kohler-tcpm-extopt-00.txt
or
http://www.potaroo.net/ietf/all-ids/draft-eddy-tcp-loo-03.txt

-- 
Wesley M. Eddy
Verizon Federal Network Systems

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