TCAP CCO: implement indication of 'lastComponent' to TC-USER

The TC-User can now look at the 'lastComponent' member of the
component in order to determine if this is the last component
within the current message, or if there will be more components.

TCAP/src/ITU/tcap_cco_server.erl

@@ -311,42 +311,48 @@ uprim_to_asn_rec(#'TC-U-REJECT'{invokeID = InvId, problemCode = Pcode}) ->
 	{reject, #'Reject'{invokeId = InvId, problem = Pcode}}.
 
 % Convert from asn1ct-generated record to the primitive records
-asn_rec_to_uprim({invoke, AsnRec}, DlgId) when is_record(AsnRec, 'Invoke') ->
+asn_rec_to_uprim({invoke, AsnRec}, DlgId, Last) when is_record(AsnRec, 'Invoke') ->
 	#'TC-INVOKE'{dialogueID = DlgId,
 		     invokeID = inv_id_to_uprim(AsnRec#'Invoke'.invokeId),
 		     linkedID = inv_id_to_uprim(AsnRec#'Invoke'.linkedId),
 		     operation = AsnRec#'Invoke'.opcode,
-		     parameters = AsnRec#'Invoke'.argument};
-asn_rec_to_uprim({returnResultNotLast, AsnRec}, DlgId) when is_record(AsnRec, 'ReturnResult') ->
+		     parameters = AsnRec#'Invoke'.argument,
+		     lastComponent = Last};
+asn_rec_to_uprim({returnResultNotLast, AsnRec}, DlgId, Last) when is_record(AsnRec, 'ReturnResult') ->
 	#'ReturnResult_result'{opcode = Op, result = Result} = AsnRec#'ReturnResult'.result,
 	#'TC-RESULT-NL'{dialogueID = DlgId,
 			invokeID = inv_id_to_uprim(AsnRec#'ReturnResult'.invokeId),
 			operation = Op,
-			parameters = Result};
-asn_rec_to_uprim({returnResult, AsnRec}, DlgId) when is_record(AsnRec, 'ReturnResult') ->
+			parameters = Result,
+			lastComponent = Last};
+asn_rec_to_uprim({returnResult, AsnRec}, DlgId, Last) when is_record(AsnRec, 'ReturnResult') ->
 	#'ReturnResult_result'{opcode = Op, result = Result} = AsnRec#'ReturnResult'.result,
 	#'TC-RESULT-L'{dialogueID = DlgId,
 			invokeID = inv_id_to_uprim(AsnRec#'ReturnResult'.invokeId),
 			operation = Op,
-			parameters = Result};
-asn_rec_to_uprim({returnError, AsnRec}, DlgId) when is_record(AsnRec, 'ReturnError') ->
+			parameters = Result,
+			lastComponent = Last};
+asn_rec_to_uprim({returnError, AsnRec}, DlgId, Last) when is_record(AsnRec, 'ReturnError') ->
 	#'TC-U-ERROR'{dialogueID = DlgId,
 		      invokeID = inv_id_to_uprim(AsnRec#'ReturnError'.invokeId),
 		      error = AsnRec#'ReturnError'.errcode,
-		      parameters = AsnRec#'ReturnError'.parameter};
-asn_rec_to_uprim({reject, AsnRec}, DlgId) when is_record(AsnRec, 'Reject') ->
+		      parameters = AsnRec#'ReturnError'.parameter,
+		      lastComponent = Last};
+asn_rec_to_uprim({reject, AsnRec}, DlgId, Last) when is_record(AsnRec, 'Reject') ->
 	#'TC-U-REJECT'{dialogueID = DlgId,
 			invokeID = inv_id_to_uprim(AsnRec#'Reject'.invokeId),
-			problemCode = AsnRec#'Reject'.problem}.
+			problemCode = AsnRec#'Reject'.problem,
+			lastComponent = Last}.
 
 
-process_rx_components(_ISMs, _Usap, _DlgId, []) ->
+process_rx_components(ISMs, Usap, DlgId, [Head|[]]) ->
+	process_rx_component(ISMs, Usap, DlgId, Head, true),
 	ok;
 process_rx_components(ISMs, Usap, DlgId, [Head|Tail]) ->
-	process_rx_component(ISMs, Usap, DlgId, Head),
+	process_rx_component(ISMs, Usap, DlgId, Head, false),
 	process_rx_components(ISMs, Usap, DlgId, Tail).
 
-process_rx_component(ISMs, Usap, DlgId, C={invoke, #'Invoke'{}}) ->
+process_rx_component(ISMs, Usap, DlgId, C={invoke, #'Invoke'{}}, Last) ->
 	InvId = get_invoke_id_from_comp(C),
 	{invoke, I} = C,
 	case I#'Invoke'.linkedId of
@@ -357,9 +363,9 @@ process_rx_component(ISMs, Usap, DlgId, C={invoke, #'Invoke'{}}) ->
 		% FIXME
 		ok
 	end,
-	Prim = asn_rec_to_uprim(C, DlgId),
+	Prim = asn_rec_to_uprim(C, DlgId, Last),
 	gen_fsm:send_event(Usap, {'TC','INVOKE',indication,Prim});
-process_rx_component(ISMs, _Usap, DlgId, C={reject, #'Reject'{problem=Problem}}) ->
+process_rx_component(ISMs, _Usap, DlgId, C={reject, #'Reject'{problem=Problem}}, Last) ->
 	InvId = get_invoke_id_from_comp(C),
 	ISM = lists:keyfind(InvId, 1, ISMs),
 	case Problem of
@@ -370,15 +376,15 @@ process_rx_component(ISMs, _Usap, DlgId, C={reject, #'Reject'{problem=Problem}})
 		ok
 	end,
 	% FIXME: decide on TC-U-REJECT or TC-R-REJECT
-	Prim = asn_rec_to_uprim(C, DlgId),
+	Prim = asn_rec_to_uprim(C, DlgId, Last),
 	{InvId, ISM} = lists:keyfind(InvId, 1, ISMs),
 	gen_fsm:send_event(ISM, Prim);
-process_rx_component(ISMs, _Usap, DlgId, Comp) ->
+process_rx_component(ISMs, _Usap, DlgId, Comp, Last) ->
 	% syntax error?
 	InvId = get_invoke_id_from_comp(Comp),
 	{InvId, ISM} = lists:keyfind(InvId, 1, ISMs),
 	% FIXME: ISM active (No -> 6)
-	Prim = asn_rec_to_uprim(Comp, DlgId),
+	Prim = asn_rec_to_uprim(Comp, DlgId, Last),
 	gen_fsm:send_event(ISM, Prim).
 
 add_components_to_state(State = #state{components=CompOld}, CompNew) when is_list(CompNew) ->