netdev - Re: [net-next-2.6 PATCH v4 2/3] TCPCT part 1b: sysctl_tcp_cookie_size, socket option TCP_COOKIE

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Message-ID: <4AEEB842.1070705@gmail.com>
Date:	Mon, 02 Nov 2009 05:45:22 -0500
From:	William Allen Simpson <william.allen.simpson@...il.com>
To:	Eric Dumazet <eric.dumazet@...il.com>
CC:	Linux Kernel Network Developers <netdev@...r.kernel.org>
Subject: Re: [net-next-2.6 PATCH v4 2/3] TCPCT part 1b: sysctl_tcp_cookie_size,
 socket option TCP_COOKIE_TRANSACTIONS, functions

Eric Dumazet wrote:
> William Allen Simpson a écrit :
>> These functions will also be used in subsequent patches that implement
>> additional features.
>>
> 
> +#define TCP_EXTEND_TIMESTAMP	(1 << 4)	/* Initiate 64-bit timestamps */
> 
> What is this for ?
> 
Reserving a bit in the sockopt for a future feature (described in the
aforementioned end2end-interest email messages).

Certainly, reserving bits seems to be common elsewhere in Linux code.  I'm
trying to coordinate this with the *BSD developers, too, so it helps to keep
API documentation synchronized.  Is that a problem?
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