netdev - Re: [PATCH 4/9] tproxy: added tproxy sockopt interface in the IPV6 layer

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Message-ID: <1287650781.13326.1.camel@este.odu>
Date:	Thu, 21 Oct 2010 10:46:21 +0200
From:	KOVACS Krisztian <hidden@...abit.hu>
To:	Jan Engelhardt <jengelh@...ozas.de>
Cc:	netdev@...r.kernel.org, netfilter-devel@...r.kernel.org,
	Patrick McHardy <kaber@...sh.net>,
	David Miller <davem@...emloft.net>
Subject: Re: [PATCH 4/9] tproxy: added tproxy sockopt interface in the IPV6
 layer

Hi,

On Thu, 2010-10-21 at 10:39 +0200, Jan Engelhardt wrote:
> On Wednesday 2010-10-20 13:21, KOVACS Krisztian wrote:
> 
> >@@ -268,6 +268,10 @@ struct in6_flowlabel_req {
> > /* RFC5082: Generalized Ttl Security Mechanism */
> > #define IPV6_MINHOPCOUNT		73
> > 
> >+#define IPV6_ORIGDSTADDR        74
> >+#define IPV6_RECVORIGDSTADDR    IPV6_ORIGDSTADDR
> >+#define IPV6_TRANSPARENT        75
> >+
> 
> Why do we actually need two names for the same thing?

IPV6_RECVORIGDSTADDR is the name of the socket option you're supposed to
set if you require the original destination address. IPV6_ORIGDSTADDR is
the name of the ancillary message you get with the actual address in it.
Just like we have it for IP_TOS/IP_RECVTOS, for example.

--KK



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