From: Florian Westphal <fw@strlen.de>
Date: Tue, 30 Oct 2012 01:08:49 +0000 (+0000)
Subject: netfilter: ipv6: add getsockopt to retrieve origdst
X-Git-Tag: omap-for-v3.8/fixes-for-merge-window-v4-signed~45^2~305^2~1
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=121d1e0941e05c64ee4223064dd83eb24e871739;p=pandora-kernel.git

netfilter: ipv6: add getsockopt to retrieve origdst

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.

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.

Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---

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