anchor.diff:      case diameter_lib:eval([F|T]) of
           ok ->
               ccb(Rest, T);
  -        N when 2 == N div 1000 ->  %% 2xxx Result-Code
  +        N when ?IS_SUCCESS(N) ->  %% 2xxx result code: accept immediately
               N;
           Res ->
               ?THROW({capabilities_cb, F, rejected(Res)})
  
positive.code: -define(NO_INBAND_SECURITY, 0).
  -define(TLS, 1).
  
  -define(LOOP_TIMEOUT, 2000).
  
  %% RFC 3588:
  %%
  
negative.code:     %% connection with the peer.
  
      try
          ?IS_SUCCESS(RC)
              orelse ?THROW(RC),
          [] == SApps
              andalso ?THROW(no_common_application),
  