anchor.diff:  			#eap_packet{code = response, identifier = EapID, data = TtlsPacket} ->
   				#eap_ttls{data = TtlsData} = ocs_eap_codec:eap_ttls(TtlsPacket),
   				ocs_eap_ttls_transport:deliver(SslPid, self(), [TtlsData]),
  -				{next_state, passthrough, NewStateData};
  +				{next_state, server_passthrough, NewStateData};
   			#eap_packet{code = request, identifier = NewEapID} ->
   					NewEapPacket = #eap_packet{code = response, type = ?LegacyNak,
   							identifier = NewEapID, data = <<0>>},
  
positive.code: 
  %% export the ocs_eap_ttls_fsm state callbacks
  -export([ssl_start/2, eap_start/2, client_hello/2, server_hello/2,
  			client_cipher/2, passthrough/2, server_cipher/2, finish/2]).
  
  %% export the call backs needed for gen_fsm behaviour
  -export([init/1, handle_event/3, handle_sync_event/4, handle_info/3,
  
negative.code: 	send_response(EapPacket, ?AccessChallenge,
  			RadiusID, [], RequestAuthenticator, Secret, RadiusFsm),
  	NewStateData = StateData#statedata{eap_id = NewEapID, tx_buf = []},
  	{next_state, client_passthrough, NewStateData}.
  
  -spec client_passthrough(Event :: timeout | term(), StateData :: #statedata{}) ->
  	Result :: {next_state, NextStateName :: atom(), NewStateData :: #statedata{}}
  		| {next_state, NextStateName :: atom(), NewStateData :: #statedata{},
  		Timeout :: non_neg_integer() | infinity}
  		| {next_state, NextStateName :: atom(), NewStateData :: #statedata{}, hibernate}
  		| {stop, Reason :: normal | term(), NewStateData :: #statedata{}}.
  %% @doc Handle events sent with {@link //stdlib/gen_fsm:send_event/2.
  %%		gen_fsm:send_event/2} in the <b>client_passthrough</b> state.
  %% @@see //stdlib/gen_fsm:StateName/2
  %% @private
  client_passthrough(timeout, #statedata{session_id = SessionID} =
  		StateData) ->
  	{stop, {shutdown, SessionID}, StateData};
  client_passthrough({#radius{code = ?AccessRequest, id = RadiusID,
  		authenticator = RequestAuthenticator, attributes = Attributes},
  		RadiusFsm}, #statedata{eap_id = EapID,session_id = SessionID,
  		secret = Secret, ssl_pid = SslPid} = StateData) ->
  