rule
typedef struct mbuf * (*op_t)(struct mbuf *, struct rule *);
struct rule {
int ipfw_add_protected_rule(struct ip_fw_chain *chain, struct ip_fw *rule);
struct ip_fw *rule);
void ipfw_free_rule(struct ip_fw *rule);
int ipfw_match_range(struct ip_fw *rule, ipfw_range_tlv *rt);
int ipfw_check_rule(struct ip_fw_rule *rule, size_t size,
int ipfw_reset_eaction(struct ip_fw_chain *ch, struct ip_fw *rule,
struct rule {
struct rule {