DS_HDL_ISCLIENT_BIT
hdl = newsvc->hdl | DS_HDL_ISCLIENT_BIT;
#define DS_HDL_ISCLIENT(hdl) ((hdl) & DS_HDL_ISCLIENT_BIT)
#define DS_HDL_SET_ISCLIENT(hdl) ((hdl) |= DS_HDL_ISCLIENT_BIT)