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:                    streams = {IS, OS}});
  
  %% ... or not: try the next address.
  recv({[], #sctp_assoc_change{} = E},
       #transport{assoc_id = undefined,
                  socket = Sock,
                  mode = {connect = C, {[RA|RAs], RP, Es}}}
  
negative.code:     S#transport{mode = {C, connect(Sock, RAs, RP, [{RA,E} | Es])}};
  
  %% Lost association after establishment.
  recv({_, #sctp_assoc_change{}}, _) ->
      stop;
  
  %% Inbound Diameter message.
  