npfctl_build_rule
npfctl_build_rule($1 | $2 | $3 | $4, $5,
npfctl_build_rule($1 | $2 | $3 | $4, $5,
npfctl_build_rule($1 | $3 | $4, $5, 0, NULL, &$6, NULL, NULL);
void npfctl_build_rule(uint32_t, const char *, sa_family_t,