PF header net/pfvar.h missing
I know that PF is included in OSX kernel, even though it's disabled by default.
Also I know it's possible to control PF in OSX someway, because applications like https://murusfirewall.com/ exist, providing user-friendly GUI for this low-level "king of firewalls". Also this API is not manual /etc/pf.conf parsing, as I suspected first.
Any way to add these headers and control PF from my OSX applications?
MacOS Sierra 10.12.6
Xcode 9.2 (9C40b)