netdev - Re: [PATCH] IPv6: Implement RFC 4429 Optimistic Duplicate Address Detection

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Message-ID: <45B93062.7060101@hp.com>
Date:	Thu, 25 Jan 2007 17:34:10 -0500
From:	Vlad Yasevich <vladislav.yasevich@...com>
To:	Neil Horman <nhorman@...driver.com>
Cc:	Sridhar Samudrala <sri@...ibm.com>,
	YOSHIFUJI Hideaki / 吉藤英明 <yoshfuji@...ux-ipv6.org>,
	davem@...emloft.net, kuznet@....inr.ac.ru, pekkas@...core.fi,
	jmorris@...ei.org, kaber@...eworks.de, netdev@...r.kernel.org
Subject: Re: [PATCH] IPv6: Implement RFC 4429 Optimistic Duplicate Address
 Detection

Hi Neil

I went through the RFC again it seems like the following is missing:

Section 3.3:

> * (modifies section 5.4.2) The host MUST join the all-nodes multicast
>    address and the solicited-node multicast address of the
>    Tentative address.  The host SHOULD NOT delay before sending
>    Neighbor Solicitation messages.

For this, addrconf_dad_kick() should pass 0 to addrconf_mod_timer
when the address is optimistic.  Otherwise, we'll delay DAD some of
the purpose of optimistic addresses is lost.

-vlad
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