Hi, Here is patch to import the FreeBSD's libnv library: http://www.netbsd.org/~rmind/libnv.diff For more details on libnv: https://www.freebsd.org/cgi/man.cgi?query=nv&sektion=9 I have already converted the standalone/upstream NPF to use libnv, so it would be the first user of this library. Thanks. -- Mindaugas