Re: [PATCH][IPSEC] inter address family IPsec tunnel on the fly

[Kazunori MIAZAWA <kazunori@miyazawa.org>]

David Miller wrote:
> From: Kazunori MIYAZAWA <kazunori@miyazawa.org>
> Date: Fri, 07 Mar 2008 15:32:09 +0900
> 
>> David Miller wrote:
>>> I also wonder if the PF_KEY limitation really exists.  For example we
>>> will set x->sel.family etc. from the SADB_EXT_ADDRESS_PROXY attribute
>>> if present.
>>>
>> Yes, we have SADB_EXT_ADDRESS_PROXY. But it is not enough, I think.
>> xfrm_selector has both src and dst so that we need some way to
>> specify the address is src or dst.
>>
>> from RFC2367
> 
> Thank you for this information.
> 
>>> Finally, if the determination can be made in the data path, it
>>> by definition could be made during rule insertion which is much
>>> more efficient and appropriate.
>> I agree with you.
> 
> I am sure there is a simple solution to this problem somewhere,
> it is just hiding :-)
> 

I think one solution is xfrm_state has two inner_modes
and switch them when the family is any.

This is just an idea :-p

--
Kazunori Miyazawa