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

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Message-ID: <20130209230806.GA16640@order.stressinduktion.org>
Date:	Sun, 10 Feb 2013 00:08:06 +0100
From:	Hannes Frederic Sowa <hannes@...essinduktion.org>
To:	YOSHIFUJI Hideaki <yoshfuji@...ux-ipv6.org>
Cc:	Erik Hugne <erik.hugne@...csson.com>, netdev@...r.kernel.org,
	YOSHIFUJI Hideaki <yoshfuji@...e.ad.jp>
Subject: Re: [IPv6] interface-local multicast escapes the local node

On Sat, Feb 09, 2013 at 11:12:46PM +0900, YOSHIFUJI Hideaki wrote:
> Hi,
> 
> Hannes Frederic Sowa wrote:
> > On Wed, Feb 06, 2013 at 05:54:15PM +0100, Hannes Frederic Sowa wrote:
> >> On Thu, Feb 07, 2013 at 12:24:14AM +0900, YOSHIFUJI Hideaki wrote:
> >>> NAK.  I think we should select routes via loopback device here.
> >>
> >> Will try your idea, thanks.
> > 
> > Does this patch look reasonable? Btw. i am pleased to see this kind of
> > things work out as expected most of the time (addrtype checking etc. all
> > in place). :)
> > 
> 
> Well, I rethink of what "interface-local" means.
> 
> It seems applications will join ff01::/16%eth0 instead of ff01::/16%lo.
> If so, your original patch seems better.  My bad, sorry.

No problem, will do. I have not checked carefully, but this would mean we have
to do changes to glibc to have a correct behaving getaddrinfo?

> Would you update original one, with minor modification that defers
> kfree_skb() after incrementing MIB, please?

Yes. Will send the patch tomorrow at the latest.
> 
> If you think we should join ff01::{1,2} by default, you can send another
> patch for it.  (BTW, why don't we join ff05::2, then? ;-))

Ok, I'll split it up. You are right about ff05::2, seems like the right thing
to do, somehow. I hope this won't impact any multicast routing daemons. 

Thanks,

  Hannes

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