IPV6_FW_F_DRNG
if (i==0 && (chain->fw_flg & IPV6_FW_F_DRNG))
rule.fw_flg |= IPV6_FW_F_DRNG;
if ((frwl->fw_flg & IPV6_FW_F_DRNG) && IPV6_FW_GETNDSTP(frwl) < 2) {
f->fw_flg & IPV6_FW_F_DRNG))