IPV6_FW_F_INVSRC
printf(" from %s", chain->fw_flg & IPV6_FW_F_INVSRC ? "not " : "");
rule.fw_flg |= IPV6_FW_F_INVSRC;
if (((f->fw_flg & IPV6_FW_F_INVSRC) != 0) ^