netdev - Re: [PATCH] TCP: Add seq and ack numbers to TCP

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Message-ID: <20080709104934.390cd81b@speedy>
Date:	Wed, 9 Jul 2008 10:49:34 -0700
From:	Stephen Hemminger <stephen.hemminger@...tta.com>
To:	"Adam Langley" <agl@...erialviolet.org>
Cc:	davem@...emloft.net, netdev@...r.kernel.org
Subject: Re: [PATCH] TCP: Add seq and ack numbers to TCP_INFO

On Wed, 9 Jul 2008 10:23:43 -0700
"Adam Langley" <agl@...erialviolet.org> wrote:

> TCP: Add seq and ack numbers to TCP_INFO
> 
> No ABI breakage: Userspace specifies the size of the structure that they're
> expecting, and the new fields are at the end, so existing code should function
> just fine as we'll truncate the new struct tcp_info to fit.
> 
> Signed-off-by: Adam Langley <agl@...erialviolet.org>

Of what possible use is this to an application? I worry that applications would
come to expect or use certain characteristics of the network and TCP which
would be broken by later changes.
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