ipfw_find_rule
f_pos = ipfw_find_rule(chain, i, 0);
ipfw_find_rule(chain, args->rule.rulenum,
f_pos = ipfw_find_rule(chain,
data->f_pos = ipfw_find_rule(&V_layer3_chain,
int ipfw_find_rule(struct ip_fw_chain *chain, uint32_t key, uint32_t id);
da.b = ipfw_find_rule(chain, rnum, 0);
da.e = ipfw_find_rule(chain, rnum, UINT32_MAX) + 1;
rule_idx = ipfw_find_rule(chain, insert_before, 0);
start = ipfw_find_rule(chain, rt->start_rule, 0);
end = ipfw_find_rule(chain, rt->end_rule, UINT32_MAX);