netdev - Re: [PATCH] sctp: IPsec rules are ineffective with ipv6

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Message-ID: <4B61AC22.2050907@hp.com>
Date:	Thu, 28 Jan 2010 10:24:18 -0500
From:	Vlad Yasevich <vladislav.yasevich@...com>
To:	David Miller <davem@...emloft.net>
CC:	nicolas.dichtel@....6wind.com, netdev@...r.kernel.org,
	linux-sctp@...r.kernel.org
Subject: Re: [PATCH] sctp: IPsec rules are ineffective with ipv6



David Miller wrote:
> From: Nicolas Dichtel <nicolas.dichtel@....6wind.com>
> Date: Wed, 27 Jan 2010 15:12:59 +0100
> 
>> xfrm_lookup() is missing in sctp_v6_xmit(), add it.
>>
>> Signed-off-by: Junwei Zhang <junwei.zhang@...nd.com>
>> Signed-off-by: Nicolas Dichtel <nicolas.dichtel@...nd.com>
> 
> Doing this every transmit packet is overkill.
> 
> Whatever calculates the route that ends up in skb_dst(skb)
> should be making this xfrm_lookup() call, not here.
> 


Hmm.. Interesting.  Looks like ip_route_output_key() will
do xfrm_lookup for you, but there is no ipv6 route lookup call
that will do the same thing.

I guess we'll need to add an xfrm_lookup call in sctp_v6_get_dst().

-vlad
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