anchor.diff:                                  [{callback_module, of_driver_handler_mock},
                                    {listen_port, ?LISTEN_PORT},
                                    {init_opt, ConnTable}]],
  -    ok = application:start(eenum),
  -    ok = application:start(of_protocol),
  -    ok = application:start(lager),
  -    ok = application:start(of_driver),
  +    {ok, _} = application:ensure_all_started(of_driver),
       Socket = connect(),
       {Socket, ConnTable}.
   
  
positive.code: 
  send_msg(Socket, Msg) ->
  %   ?debugFmt("~n~nsend message: ~p~n", [Msg]),
      {ok, Bin} = of_protocol:encode(Msg),
      ok = gen_tcp:send(Socket, Bin).
  
  connect_aux(AuxId) ->
  
negative.code:         version = ?VERSION, 
          type = packet_in,
          body = #ofp_packet_in{
              total_len = 5,
              buffer_id = no_buffer,
              reason = action,
              table_id = 1,
  