linux-kernel - Re: [PATCH v3 2/2] tcp: md5: add TCP_MD5SIG_EXT socket option to set a key address prefix

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Date:   Mon, 19 Jun 2017 13:52:23 -0400 (EDT)
From:   David Miller <davem@...emloft.net>
To:     colona@...sta.com
Cc:     eric.dumazet@...il.com, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 2/2] tcp: md5: add TCP_MD5SIG_EXT socket option to
 set a key address prefix

From: Ivan Delalande <colona@...sta.com>
Date: Thu, 15 Jun 2017 18:07:07 -0700

> Replace first padding in the tcp_md5sig structure with a new flag field
> and address prefix length so it can be specified when configuring a new
> key for TCP MD5 signature. The tcpm_flags field will only be used if the
> socket option is TCP_MD5SIG_EXT to avoid breaking existing programs, and
> tcpm_prefixlen only when the TCP_MD5SIG_FLAG_PREFIX flag is set.
> 
> Signed-off-by: Bob Gilligan <gilligan@...sta.com>
> Signed-off-by: Eric Mowat <mowat@...sta.com>
> Signed-off-by: Ivan Delalande <colona@...sta.com>

Applied but I had to renumber TCP_MD5SIG_EXT to 32 since 31 is already
taken by TCP_ULP in my tree.

It's a shame we had to add a new sockopt number to do this, but I can't
think of a better idea.

Thanks.