Idea "can we have WPS hanshake file to crack offline"

Hi all, greats for all bt team,
nowadays cracking wpa/wpa2 was using WPS bruteforcing ,, using reaver
i just wondered if programmers can have a tool or some thing to get the WPS as a file and being cracked using pyrit or aircrack or something like that ,,,
that will be better from facing problems with the router .. like: "rate limiting" or "identity request" or other problems.
so hope this post will give an idea about this ,,
and hope programers and one who have idea in cracking wireless take this as a point to develop
maybe i should post this in aircrack forum.. but i used to login here :D .. and hope Mister_X sees this.
THANKS ALL ( it was an idea )
REGARDS

It doesn't work like that.
There's no handshake. The router just approves the WPS pin or it doesn't (Obviously there's a bit more to it than that, but you get the idea)
So you can't crack the WPS pin offline unfortunately... or fortunately, as it may be.

Hope that helps!

Its an online only attack. If it was possible to turn this into an offline attack, it would've (or will) been done for obvious reasons.