anchor.diff:  %%% a {tcp_closed,Socket} message. (Active mode.)
   %%%
   busy_disconnect_active(Config) when is_list(Config) ->
  -    try do_busy_disconnect_active(Config)
  -    catch
  -        throw:{skip, _} = SKIP ->
  -            SKIP
  -end.
  +    ?TC_TRY(busy_disconnect_active,
  +            fun() -> do_busy_disconnect_active(Config) end).
   
   do_busy_disconnect_active(_Config) ->
       ?P("[active] begin"),
  
positive.code: 
  do_busy_disconnect_active2(MuchoData, N) ->
      ?P("[active,~w] *** prepare server *** ", [N]),
      S = busy_disconnect_prepare_server([{active,true}]),
      ?P("[active,~w] server prepared - start sending", [N]),
      busy_disconnect_active_send(S, MuchoData).
  
  busy_disconnect_active_send(S, Data) ->
      case gen_tcp:send(S, Data) of
  	ok ->
              busy_disconnect_active_send(S, Data);
  	{error, closed} ->
              ?P("[active-sender] send failed with closed - await tcp-closed"),
  	    receive
  		{tcp_closed, S} ->
                      ?P("[active-sender] received tcp-closed"),
                      ok;
  		Other ->
                      ?P("[active-sender] received UNEXPECTED message:"
                         "~n   ~p", [Other]),
                      ct:fail({unexpected, Other, S, flush([])})
  	    end;
          {error, Reason} ->
              ?P("[active-sender] UNEXPECTED send failure:"
                 "~n   ~p", [Reason]),
              ct:fail({unexpected_send_result, Reason})
      end.
  
  
  busy_disconnect_prepare_server(ConnectOpts) ->
      Sender = self(),
  
negative.code: 
  do_busy_disconnect_passive2(MuchoData, N) ->
      ?P("[passive,~w] *** prepare server *** ", [N]),
      {_Server, S} = busy_disconnect_prepare_server([{active,false}]),
      ?P("[passive,~w] server prepared - start sending", [N]),
      busy_disconnect_passive_send(S, MuchoData).
  
  busy_disconnect_passive_send(S, Data) ->
      case gen_tcp:send(S, Data) of
  	ok ->
              busy_disconnect_passive_send(S, Data);
  	{error, closed} ->
              ok
      end.
  
  %%%
  