Apparently after Blackberry, few car manufacturers, and Apple, Oracle decided to adopt PF as the official firewall of Solaris 12. IPF which was originally developed on Solaris and became its default firewall is apparently on the death row. Oracle is actually using so recent version of PF that their patches have popped up on tech@openbsd.
http://bsdly.blogspot.de/2015/04/solaris-admins-for-glimpse-of-your.html
http://marc.info/?l=openbsd-tech&m=142822852613581&w=2
http://bsdly.blogspot.de/2015/04/solaris-admins-for-glimpse-of-your.html
http://marc.info/?l=openbsd-tech&m=142822852613581&w=2