in_ndport
nat->in_ndport = nat->in_odport;
nat->in_ndport = $3;
nat->in_ndport = ntohs(pnum);
nat->in_ndport = $3;
nat->in_ndport = ntohs(pnum);
nat->in_ndport = $2.p1;
nat->in_ndport = $3;
ipn->in_ndport = htons(fin->fin_sport);
udp.uh_dport = ti->ti_rule->in_ndport;
fi.fin_dport = ntohs(ti->ti_rule->in_ndport);