enum service_messages {
  INVALID_MESSAGE = 0,
  SERVER_FAILURE = 0x80000000,
  SERVER_SUCCESS = 0x40000000,
  SERVER_NEED_TIME = 0x20000000,
  CLIENT_LOAD_SERVICE = 1,
  CLIENT_UNLOAD_SERVICE,
  CLIENT_CONNECT,
  CLIENT_DISCONNECT,
  RU_ALIVE,
  IM_ALIVE,
  CLIENT_REGISTER_SERVICE,
  CLIENT_LIST_SERVICES,
  IM_TARDY
};