netdev - Re: [IPv6] interface-local multicast escapes the local node

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Message-ID: <20130206162519.GA19537@order.stressinduktion.org>
Date:	Wed, 6 Feb 2013 17:25:19 +0100
From:	Hannes Frederic Sowa <hannes@...essinduktion.org>
To:	Eric Dumazet <eric.dumazet@...il.com>
Cc:	YOSHIFUJI Hideaki <yoshfuji@...ux-ipv6.org>,
	Erik Hugne <erik.hugne@...csson.com>, netdev@...r.kernel.org
Subject: Re: [IPv6] interface-local multicast escapes the local node

On Wed, Feb 06, 2013 at 08:18:47AM -0800, Eric Dumazet wrote:
> On Wed, 2013-02-06 at 17:04 +0100, Hannes Frederic Sowa wrote:
> > On Thu, Feb 07, 2013 at 12:32:17AM +0900, YOSHIFUJI Hideaki wrote:
> 
> > > Well, do you have relevant RFC?
> > > RFC4291 says that we should drop ff00::/16, but not ff01::/16.
> > 
> > I know what you mean, the RFC does not state it directly. Hm, the BSDs seem to
> > drop such destination addresses, too, if they don't originate from a loopback
> > interface. Or did you mean that there is a flaw in the skb->pkt_type !=
> > PACKET_LOOPBACK condition?
> 
> RFC 4291 states on page 13 :
> 
>  Interface-Local scope spans only a single interface on a node
>  and is useful only for loopback transmission of multicast.
> 
> ff01::/16 are Interface-Local, or am I missing something ?

No, that's correct.

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