netdev - Re: [PATCH -next] ipv6: reject locally assigned nexthop addresses

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Message-Id: <1432166129.744347.274292401.7D68B8C1@webmail.messagingengine.com>
Date:	Thu, 21 May 2015 01:55:29 +0200
From:	Hannes Frederic Sowa <hannes@...essinduktion.org>
To:	Florian Westphal <fw@...len.de>, netdev@...r.kernel.org
Subject: Re: [PATCH -next] ipv6: reject locally assigned nexthop addresses

On Thu, May 21, 2015, at 00:25, Florian Westphal wrote:
> ip -6 addr add dead::1/128 dev eth0
> sleep 5
> ip -6 route add default via dead::1/128
> -> fails
> ip -6 addr add dead::1/128 dev eth0
> ip -6 route add default via dead::1/128
> -> succeeds
> 
> reason is that if (nonsensensical) route above is added,
> dead::1 is still subject to DAD, so the route lookup will
> pick eth0 as outdev due to the prefix route that is added before
> DAD work is started.
> 
> Add explicit test that checks if nexthop gateway is a local address.
> 
> Link: https://bugzilla.redhat.com/show_bug.cgi?id=1167969

Should hopefully be public soon. :/

> Signed-off-by: Florian Westphal <fw@...len.de>

Acked-by: Hannes Frederic Sowa <hannes@...essinduktion.org>

Thanks!
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