netdev - Re: [PATCH net-next] IPv6: enable bind() to assign an anycast address

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Date:	Fri, 10 Jan 2014 14:01:22 -0800 (PST)
From:	François-Xavier Le Bail <fx.lebail@...oo.com>
To:	Hannes Frederic Sowa <hannes@...essinduktion.org>
Cc:	netdev@...r.kernel.org, "David S. Miller" <davem@...emloft.net>,
	Alexey Kuznetsov <kuznet@....inr.ac.ru>,
	James Morris <jmorris@...ei.org>,
	Hideaki Yoshifuji <yoshfuji@...ux-ipv6.org>,
	Patrick McHardy <kaber@...sh.net>
Subject: Re: [PATCH net-next] IPv6: enable bind() to assign an anycast address

On Fri, 1/10/14, Hannes Frederic Sowa <hannes@...essinduktion.org> wrote:

>On Fri, Jan 10, 2014 at 07:12:24PM +0100, Francois-Xavier Le Bail wrote:
>> - Add ipv6_chk_acast_addr_src() to check if an anycast address is link-local
>>   on given interface or is global (on any interface).
>> - Use it in inet6_bind().
>> 
>> Signed-off-by: Francois-Xavier Le Bail <fx.lebail@...oo.com>
>> ---
>> Tested with link-local and global anycast addresses.
>> Tested with SOCK_DGRAM socket, bind and UDP traffic OK.
>>
>> Tested with SOCK_STREAM socket, bind OK, traffic need another change.

> What do you mean with that?

In actual TCP code, if the destination address is not unicast, the request is dropped:

	if (!ipv6_unicast_destination(skb))
		goto drop;

I will send another patch to allow anycat addresses destinations fot TCP. 

bye,
Francois-Xavier

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