npf_rule_getid
uint64_t npf_rule_getid(nl_rule_t *);
uint64_t id = npf_rule_getid(rl);
uint64_t npf_rule_getid(const npf_rule_t *);
const uint64_t id = npf_rule_getid(rl);
id = npf_rule_getid(rl);
id = npf_rule_getid(rl);