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

From: William Allen Simpson <[email-masked]>
Date: Mon, 02 Nov 2009 05:45:22 -0500

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?