netdev - Re: [PATCH] [Syncookies]: Add support for TCP options via timestamps.

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Date:	Thu, 10 Apr 2008 03:12:57 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	fw@...len.de
Cc:	netdev@...r.kernel.org, ggriffin.kernel@...il.com
Subject: Re: [PATCH] [Syncookies]: Add support for TCP options via
 timestamps.

From: Florian Westphal <fw@...len.de>
Date: Wed,  2 Apr 2008 03:54:12 +0200

> Allow the use of SACK and window scaling when syncookies are used
> and the client supports tcp timestamps. Options are encoded into
> the timestamp sent in the syn-ack and restored from the timestamp
> echo when the ack is received.
> 
> Based on earlier work by Glenn Griffin.
> This patch avoids increasing the size of structs by encoding TCP
> options into the least significant bits of the timestamp and
> by not using any 'timestamp offset'.
> 
> The downside is that the timestamp sent in the packet after the synack
> will increase by several seconds.
> 
> Reviewed-by: Hagen Paul Pfeifer <hagen@...u.net>
> Signed-off-by: Florian Westphal <fw@...len.de>
> CC: Glenn Griffin <ggriffin.kernel@...il.com>
> ---
>  changes since v1:
>  don't duplicate timestamp echo decoding function, put it into ipv4/syncookie.c
>  and have ipv6/syncookies.c use it.
>  Feedback from Glenn Griffin: fix line indented with spaces, kill redundant if ()

Looks good, patch applied, thanks!
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