From: Florian Westphal <fw@strlen.de>
To: Nick Jones <nick.jones@network-box.com>
Cc: Florian Westphal <fw@strlen.de>,
netfilter-devel <netfilter-devel@vger.kernel.org>
Subject: Re: [PATCH next] netfilter: ipv6: add getsockopt to retrieve origdst
Date: Wed, 31 Oct 2012 09:48:15 +0100 [thread overview]
Message-ID: <20121031084815.GA29966@breakpoint.cc> (raw)
In-Reply-To: <1351649498.10780.6947.camel@nbnickhq4>
Nick Jones <nick.jones@network-box.com> wrote:
> > 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.
>
> Doesn't getsockname(2) provide this information?
No. It will show the local address (the address we REDIRECT'ed to).
> It does for TPROXY'd connections.
Yes, because with TPROXY the destination won't be rewritten.
next prev parent reply other threads:[~2012-10-31 8:49 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-10-30 11:08 [PATCH next] netfilter: ipv6: add getsockopt to retrieve origdst Florian Westphal
2012-10-31 2:11 ` Nick Jones
2012-10-31 8:48 ` Florian Westphal [this message]
2012-10-31 12:28 ` Amos Jeffries
2012-11-02 11:36 ` Pablo Neira Ayuso
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