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Date:	Wed, 22 Oct 2014 20:50:55 +0900
From:	Lorenzo Colitti <>
To:	Hannes Frederic Sowa <>
Cc:	Erik Kline <>, netdev <>,
	Ben Hutchings <>
Subject: Re: [RFC PATCH v2 net-next] net: ipv6: Add a sysctl to make
 optimistic addresses useful candidates

On Wed, Oct 22, 2014 at 8:36 PM, Hannes Frederic Sowa
<> wrote:
> In the near future we also must introduce specific DAD events needed for
> RFC7217 addresses (to count DAD progress and safe the information per
> prefix in user space). I would prefer to keep the logic for RTM_NEWADDR
> that the kernel will definitely allow the use of the address but
> RTM_NEWADDR should be handled idempotent by user space.

Duplicate RTM_NEWADDR notifications aren't a problem though, right?
The current code send RTM_NEWADDR every time an RA increases the
lifetime of an address, so I think it's reasonable to assume that apps
have to be able to deal with it, because it's pretty frequent.
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