fin_dport
fin->fin_dport = ntohs(tcp->th_dport);
fin->fin_dport = ntohs(udp->uh_dport);
(fin->fin_dport == e->ipfe_arg0[i]);
rv |= (fin->fin_dport == e->ipfe_arg0[i]);
fin->fin_out, fin->fin_sport, fin->fin_dport,
aps->aps_dport = htons(fin->fin_dport);
fi.fin_dport = port & 0xffff;
ipn->in_dpmin = fi.fin_dport;
ipn->in_dpmax = fi.fin_dport;
ipn->in_dpnext = fi.fin_dport;
dp = ntohs(fin->fin_dport);
fi.fin_dport = ntohs(ti->ti_rule->in_ndport);