npf_rule_export
void * npf_rule_export(nl_rule_t *, size_t *);
static nvlist_t * npf_rule_export(npf_t *, const npf_rule_t *);
if ((rule = npf_rule_export(npf, rl)) == NULL) {
rule = npf_rule_export(npf, rl);
if ((meta = npf_rule_export(rl, &len)) == NULL) {