This tool is a wrapper for the reaver WPS attack toolkit. As there is no automatic way to prescan, decide, and then start the attack, this wrapper takes care of it. Written in perl.
You can download it from the following link: https://packetstormsecurity.com/files/download/120216/nwrw.pl.txt
Source: https://packetstormsecurity.com/files/120216/Net-War-Reaver-Wrapper.html