IPMGMT_UPDATE_IF
cb.dbw_flags = IPMGMT_APPEND | IPMGMT_UPDATE_IF;
cb.dbw_flags = flags | IPMGMT_UPDATE_IF | IPMGMT_UPDATE_IPMP;
cb->dbw_flags &= ~IPMGMT_UPDATE_IF;
if ((cb->dbw_flags & (IPMGMT_UPDATE_IF | IPMGMT_UPDATE_IPMP)) == 0)