pf_rule
struct pf_rule;
struct pf_rule rule;
struct pf_rule;
struct pf_rule *ptr;
TAILQ_ENTRY(pf_rule) entries;
TAILQ_HEAD(pf_rulequeue, pf_rule);
struct pf_rule **ptr_array;
pf_rule_to_krule(const struct pf_rule *rule, struct pf_krule *krule)