pcu: SNS: add TC_sns_add_existent

Try to add via SNS an already existent NSVC which should
fail.

Change-Id: I096bcbe38d82d08a150a2f8e56f6bc02353273a1

pcu/PCU_Tests_SNS.ttcn

@@ -143,7 +143,7 @@ runs on RAW_NS_CT {
 	rx := f_ns_exp(tr_SNS_CONFIG_ACK(g_nsconfig[idx].nsei, cause), idx);
 }
 
-function f_outgoing_sns_add(integer idx_add, uint8_t w_sig := 1, uint8_t w_user := 1, integer idx := 0)
+function f_outgoing_sns_add(integer idx_add, uint8_t w_sig := 1, uint8_t w_user := 1, integer idx := 0, template (omit) NsCause cause := omit)
 runs on RAW_NS_CT {
 	log("f_outgoing_sns_add(idx_add=", idx_add, ")");
 	var PDU_NS rx;
@@ -153,13 +153,13 @@ runs on RAW_NS_CT {
 								     nsvc_cfg.provider.ip.local_udp_port,
 								     w_sig, w_user) };
 		NSCP[idx].send(t_NS_Send(g_ns_conn_id[idx], ts_SNS_ADD(g_nsconfig[idx].nsei, 23, v4)));
-		rx := f_ns_exp(tr_SNS_ACK(g_nsconfig[idx].nsei, 23, omit, v4));
+		rx := f_ns_exp(tr_SNS_ACK(g_nsconfig[idx].nsei, 23, cause, v4));
 	} else {
 		var template (omit) IP6_Elements v6 := { ts_SNS_IPv6(nsvc_cfg.provider.ip.local_ip,
 								     nsvc_cfg.provider.ip.local_udp_port,
 								     w_sig, w_user) };
 		NSCP[idx].send(t_NS_Send(g_ns_conn_id[idx], ts_SNS_ADD(g_nsconfig[idx].nsei, 23, omit, v6)));
-		rx := f_ns_exp(tr_SNS_ACK(g_nsconfig[idx].nsei, 23, omit, omit, v6));
+		rx := f_ns_exp(tr_SNS_ACK(g_nsconfig[idx].nsei, 23, cause, omit, v6));
 	}
 }
 
@@ -420,6 +420,14 @@ testcase TC_sns_add() runs on RAW_Test_CT {
 	setverdict(pass);
 }
 
+/* Test adding an already present IP endpoint at runtime */
+testcase TC_sns_add_nack() runs on RAW_Test_CT {
+	f_sns_bringup_1c1u();
+
+	f_outgoing_sns_add(idx_add := 0, w_sig := 0, w_user := 1, idx := 0, cause := NS_CAUSE_PROTOCOL_ERROR_UNSPEIFIED);
+	setverdict(pass);
+}
+
 /* Test deleting IP endpoints at runtime */
 testcase TC_sns_del() runs on RAW_Test_CT {
 	f_sns_bringup_1c1u();
@@ -473,6 +481,7 @@ control {
 	execute( TC_sns_1c1u_so_bvc_reset() );
 	execute( TC_sns_1c1u_so_bvc_reset_too_early() );
 	execute( TC_sns_add() );
+	execute( TC_sns_add_nack() );
 	execute( TC_sns_del() );
 	execute( TC_sns_chg_weight() );