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

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Date:	Thu, 28 Jan 2010 19:25:29 +0100
From:	Nicolas Dichtel <nicolas.dichtel@....6wind.com>
To:	Vlad Yasevich <vladislav.yasevich@...com>
CC:	David Miller <davem@...emloft.net>, netdev@...r.kernel.org,
	linux-sctp@...r.kernel.org
Subject: Re: [PATCH] sctp: IPsec rules are ineffective with ipv6

Hmm, seems to not work.
Problem is that we may have a NULL saddr in sctp_v6_get_dst().
What about adding a new handler in struct sctp_af, like get_xfrm_dst() that will 
be called after get_saddr()? In case of IPv4, it will not do anything.


Regards,
Nicolas

Le 28.01.2010 17:36, Vlad Yasevich a écrit :
> 
> Nicolas Dichtel wrote:
>> What about this one?
>>
>> Only compilation tested.
>>
>> xfrm_lookup() is missing in IPv6 output path. Call it when dst is build.
>> Initial patch was written by Junwei Zhang <junwei.zhang@...nd.com>
>>
>> Signed-off-by: Nicolas Dichtel <nicolas.dichtel@...nd.com>
> 
> Looks like it might do the right thing.  Please run your tests
> on this an let me.
> 
> Thanks
> -vlad
> 
>> Le 28.01.2010 16:24, Vlad Yasevich a écrit :
>>> 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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