On 13-02-06 08:53 AM, Emmanuel Thierry wrote:
Actually, we didn't think about this problem since we work with priorities, 
putting the default policy (without a mark) at a minor priority than the marked 
one.

I think priorities are the way to go in cases of ambiguity.

Your remark makes clearer the ideas behind the design of XFRM, but this leads 
to an interesting concern. If on policy insertion, the policy were inserted 
depending on the accuracy of the mark (the more the mask is specific, the more 
the mark must be put at the beginning of the list), how would we decide which 
is the more specific between these ones ?

ip -6 xfrm policy add src fd00::1/128 dst fd00::2/128 dir out mark 0x00000001 
mask 0x00000005

ip -6 xfrm policy add src fd00::1/128 dst fd00::2/128 dir out mark 0x00000001 
mask 0x00000003

They look different to me, no? i.e i dont see a conflict - one has mark=5 and the other
has mark=3.

cheers,
jamal

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