anchor.diff:  %% disabled by default so don't handle it. We could simply disable
   %% events we don't react to but don't.
   
  -recv({[], #sctp_paddr_change{}}, _) ->
  +recv({_, #sctp_paddr_change{}}, _) ->
       ok;
   
  -recv({[], #sctp_pdapi_event{}}, _) ->
  +recv({_, #sctp_pdapi_event{}}, _) ->
       ok.
   
   %% up/1
  
positive.code:                                              bin = Bin}),
      ok;
  
  recv({[], #sctp_shutdown_event{assoc_id = Id}},
       #transport{assoc_id = Id}) ->
      stop;
  
  
negative.code: %% recv/2
  
  %% Association established ...
  recv({_, #sctp_assoc_change{state = comm_up,
                              outbound_streams = OS,
                              inbound_streams = IS,
                              assoc_id = Id}},
       #transport{assoc_id = undefined,
                  mode = {T, _},
                  socket = Sock}
  