From mboxrd@z Thu Jan  1 00:00:00 1970
From: Pablo Neira Ayuso <pablo@netfilter.org>
Subject: Re: [PATCH next] netfilter: ipv6: add getsockopt to retrieve
 origdst
Date: Fri, 2 Nov 2012 12:36:46 +0100
Message-ID: <20121102113646.GA27088@1984>
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Cc: netfilter-devel <netfilter-devel@vger.kernel.org>
To: Florian Westphal <fw@strlen.de>
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On Tue, Oct 30, 2012 at 12:08:49PM +0100, Florian Westphal wrote:
> userspace can query the original ipv4 destination address of a REDIRECTed
> connection via
> getsockopt(m_sock, SOL_IP, SO_ORIGINAL_DST, &m_server_addr, &addrsize)
> 
> but for ipv6 no such option existed.
> 
> This adds getsockopt(..., IPPROTO_IPV6, IP6T_SO_ORIGINAL_DST, ...).
> 
> Without this, userspace needs to parse /proc or use ctnetlink, which
> appears to be overkill.

Applied, thanks Florian.

> ---
>  Instead of adding new IP6T_SO_ORIGINAL_DST, we could also
>  simply re-use existing SO_ORIGINAL_DST ipv4 define.  Any Preferences?

I've added this to the patch description, for the record:

"This uses option number 80 for IP6T_SO_ORIGINAL_DST, which is spare,
to use the same number we use in the IPv4 socket option
SO_ORIGINAL_DST".