IPV6_FW_F_INVDST
printf(" to %s", chain->fw_flg & IPV6_FW_F_INVDST ? "not " : "");
rule.fw_flg |= IPV6_FW_F_INVDST;
if (((f->fw_flg & IPV6_FW_F_INVDST) != 0) ^