netdev - Re: nonlocal

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Date:	Fri, 16 Dec 2011 12:10:27 +0100
From:	Francois Romieu <romieu@...zoreil.com>
To:	Vincent Bernat <bernat@...fy.cx>
Cc:	David Miller <davem@...emloft.net>, zenczykowski@...il.com,
	netdev@...r.kernel.org, yoshfuji@...ux-ipv6.org
Subject: Re: nonlocal_bind and IPv6

Vincent Bernat <bernat@...fy.cx> :
> On Fri, 16 Dec 2011 02:06:00 -0500 (EST), David Miller wrote:
> >>04:58, Maciej Żenczykowski <zenczykowski@...il.com> disait :
[...]
> >>>why not simply use the IP_TRANSPARENT or IP_FREEBIND socket
> >>>options?
> >>
> >>Because  this requires  modifying each  affected software.  This
> >>can be difficult if you don't have the source code available.
> >
> >But it means that it would work on every single kernel verion out
> >there.
[...]
> Moreover, I am just adding the IPv6 version of this setting. The
> IPv4 version already exists.

For IPv6 this is adding a system-scope function which will have to be
maintained and available for ages. It will compete with the existing,
per-application answer. The "fix you application / design" argument
is thus stronger than with IPv4.

-- 
Ueimor
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