Implement and validate TC_5GNAS_AMF_CNF_COM_01, Review TP_5GNAS_AMF_CNF_COM_01 (a7ad96e4) · Commits · INT - Core Network and Interoperability Testing / 5G Core / NAS

captures/TC_5GNAS_AMF_CNF_COM_01.pcap

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etc/Ats_NG_NAS/Ats_NG_NAS_AMF_open5gs.cfg_

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Changes for etc/Ats_NG_NAS/Ats_NG_NAS_AMF_open5gs.cfg_: 1 added line, 0 removed lines.
Original line number	Diff line number	Diff line
		@@ -19,6 +19,7 @@ NG_NAS_Pics.PICS_NAS_A4_1_2_4 := true # open5gs re-authenticates on #71 ngKSI
		NG_NAS_Pics.PICS_NAS_A4_2_1 := true # security mode control (TC_5GNAS_AMF_SEC_COM_01)
		NG_NAS_Pics.PICS_NAS_A4_2 := true # security mode control procedure (TC_5GNAS_AMF_SEC_ACC_01)
		NG_NAS_Pics.PICS_NAS_A4_3 := true # identification procedure (TC_5GNAS_AMF_IDN_REQ_01)
		NG_NAS_Pics.PICS_NAS_A4_4_1 := true # open5gs sends a NITZ-only CONFIGURATION UPDATE COMMAND on REGISTRATION COMPLETE (TC_5GNAS_AMF_CNF_COM_01)

		LibNGAP_Pics.PICS_OFFLINE_MODE := false # true to use offline mode with pcap files, false to use online mode with real network functions
		LibNGAP_Pics.PICS_USE_OPEN5GS := false # true to start open5gs, false to not start them

test_purposes/TP_AMF_NGNAS.tdltx

+12 −13

Changes for test_purposes/TP_AMF_NGNAS.tdltx: 12 added lines, 13 removed lines.
Original line number	Diff line number	Diff line
		@@ -544,10 +544,11 @@ Package TP_AMF_NGNAS {
		Test Purpose TP_5GNAS_AMF_CNF_COM_01 {

		Objective: "Verify that the IUT does not retransmit a CONFIGURATION_UPDATE_COMMAND containing only NITZ-related information elements when the Configuration update indication IE is absent or indicates that acknowledgement is not requested."
		// Example trigger observed in implementation: CONFIGURATION_UPDATE_COMMAND sent after PDU_SESSION_ESTABLISHMENT_REQUEST;
		// note that the base specification does not explicitly define when the CONFIGURATION_UPDATE_COMMAND shall be sent.
		// The base specification does not define when the IUT sends a CONFIGURATION_UPDATE_COMMAND carrying NITZ;
		// implementations send it e.g. upon receipt of the REGISTRATION_COMPLETE (open5gs) or after a
		// PDU_SESSION_ESTABLISHMENT_REQUEST. The test system shall be ready to receive it from the end of the registration.

		Reference: "ETSI TS 124 501 [1], Clauses 5.4.4.2 and 8.2.19"
		Reference: "ETSI TS 124 501 [1], Clauses 5.4.4.2, 8.2.19 and 10.2 (T3555)"

		Configuration: CF_AMF_N2N1

		@@ -555,7 +556,7 @@ Package TP_AMF_NGNAS {

		Initial conditions
		with {
		the UE entity isRegisteredToAMF
		the UE entity isRegisteredToAMF //!up to and including the REGISTRATION_COMPLETE; the UE does not answer the CONFIGURATION_UPDATE_COMMAND
		}

		Expected behaviour
		@@ -566,19 +567,17 @@ Package TP_AMF_NGNAS {
		extended_protocol_discriminator set to 5GS_MOBILITY_MANAGEMENT_MESSAGES,
		security_header_type set to INTEGRITY_PROTECTED_AND_CIPHERED,
		message_type set to CONFIGURATION_UPDATE_COMMAND,
		Full_name_for_network,
		Short_name_for_network,
		Local_time_zone,
		Universal_time_and_local_time_zone,
		Daylight_saving_time,
		not Configuration_update_indication OR
		Configuration_update_indication containing {
		Acknowledgement_requested set to 0
		}}}
		Acknowledgement_requested set to "0"} or omitted, //!no acknowledgement requested: T3555 is not started (ETSI TS 124 501 clause 5.4.4.2)
		Full_name_for_network set to RV_FULL_NAME or omitted,
		Short_name_for_network set to RV_SHORT_NAME or omitted,
		Local_time_zone set to RV_LOCAL_TIME_ZONE or omitted,
		Universal_time_and_local_time_zone set to RV_UNIVERSAL_TIME or omitted,
		Network_daylight_saving_time set to RV_DAYLIGHT_SAVING_TIME or omitted}} //!at least one of these NITZ IEs is present, and no other IE (5G-GUTI, TAI list, allowed NSSAI, ...) is present
		to the GNB entity
		}
		then {
		// PX_CUC_TWAIT value for timer awaiting no response after CUC message
		// PX_CUC_TWAIT: observation time, longer than T3555 (6 s)
		(!) PX_CUC_TWAIT after @start_CUC_event : the IUT entity does not send a DOWNLINK_NAS_TRANSPORT containing {
		NAS_PDU containing {
		extended_protocol_discriminator set to 5GS_MOBILITY_MANAGEMENT_MESSAGES,

ttcn/Ats_NG_NAS/NG_NAS_TCFunctions.ttcn

+88 −0

Changes for ttcn/Ats_NG_NAS/NG_NAS_TCFunctions.ttcn: 88 added lines, 0 removed lines.
Original line number	Diff line number	Diff line
		@@ -693,7 +693,95 @@ module NG_NAS_TCFunctions {
		log("* " & __SCOPE__ & ": INFO: Postamble done. *");
		} // End of function f_TC_5GNAS_AMF_IDN_REQ_01

		/**
		* @desc Testcase function for TC_5GNAS_AMF_CNF_COM_01
		* @see TP_5GNAS_AMF_CNF_COM_01: the IUT sends a CONFIGURATION UPDATE COMMAND with only NITZ information and no
		* acknowledgement requested (integrity protected and ciphered, mw_NG_CONFIGURATION_UPDATE_COMMAND_nitzOnly,
		* at least one NITZ IE); left unanswered, it is not retransmitted during PX_CUC_TWAIT (no T3555,
		* TS 24.501 clause 5.4.4.2). The IUT sends it on registration completion (e.g. open5gs), so the REGISTRATION
		* COMPLETE, which makes the UE registered, is sent at the start of the test body: the CONFIGURATION UPDATE
		* COMMAND that follows would otherwise arrive during the synchronisation and be discarded by a_defaultNGAP.
		*/
		function f_TC_5GNAS_AMF_CNF_COM_01() runs on aMF_NGNAS_NGAPComponent {
		// Local variables
		var NG_NAS_DL_Message_Type v_message;
		var NGAP_PDU v_PDU;
		var NAS_PDU v_cucPdu;
		var integer v_sht;
		timer t_observation := PX_CUC_TWAIT;

		// Preamble: NG SETUP, registration up to the INITIAL CONTEXT SETUP (REGISTRATION ACCEPT)
		f_NGNAS_amf_init();
		f_NG_NAS_amf_UE_Register();
		f_NG_NAS_amf_UE_Authentication();
		f_NG_NAS_amf_UE_SecurityMode();
		f_NG_NAS_amf_UE_InitialContextSetup();
		f_selfOrClientSyncAndVerdict(c_prDone, f_getVerdict());
		log("* " & __SCOPE__ & ": INFO: Preamble done. *");

		// Test Body
		// The UE is registered (REGISTRATION COMPLETE)
		f_NG_NAS_amf_RegistrationComplete();
		// When: CONFIGURATION UPDATE COMMAND with only NITZ information, no acknowledgement requested
		f_recv_NGAP_PDU(
		mw_ngap_initMsg(
		mw_n2_DownlinkNASTransport(
		vc_AMF_UE_ID,
		vc_RAN_UE_ID,
		? // ConfigurationUpdateCommand
		)));
		t_observation.start;
		f_NASPDU_Get(vc_recvNGAP_PDU);
		v_cucPdu := vc_recvNAS_PDU;
		v_sht := bit2int(substr(oct2bit(vc_recvNAS_PDU[1]), 4, 4)); // TS 24.501 clause 9.3: octet 2, bits 4 to 1
		if (v_sht != 2) {
		setverdict(inconc, "* " & __SCOPE__ & ": INCONC: security header type " & int2str(v_sht) & ", 2 (integrity protected and ciphered) expected *");
		} else if (not f_Check_5GAKA_NAS_DL_Message(vc_recvNAS_PDU, mw_NG_CONFIGURATION_UPDATE_COMMAND, vc_ng_nas_security_params_type, vc_previous_nas_count_dl, v_message, vc_inner_message)) {
		setverdict(inconc, "* " & __SCOPE__ & ": INCONC: no CONFIGURATION UPDATE COMMAND (the IUT does not send one on registration completion) *");
		} else if (not match(v_message, mw_NG_CONFIGURATION_UPDATE_COMMAND_nitzOnly) or
		not (ispresent(v_message.configuration_Update_Command.fullNetworkName) or
		ispresent(v_message.configuration_Update_Command.shortNetworkName) or
		ispresent(v_message.configuration_Update_Command.localTimeZone) or
		ispresent(v_message.configuration_Update_Command.localTimeZoneAndTime) or
		ispresent(v_message.configuration_Update_Command.daylightSavingTime))) {
		setverdict(inconc, "* " & __SCOPE__ & ": INCONC: the CONFIGURATION UPDATE COMMAND is not NITZ only without acknowledgement requested *");
		} else {
		log("* " & __SCOPE__ & ": INFO: NITZ-only CONFIGURATION UPDATE COMMAND, no acknowledgement requested *");
		// Then: no retransmission during PX_CUC_TWAIT
		alt {
		[] N2_gNBaMF_P.receive(
		mw_ngap_initMsg(
		mw_n2_DownlinkNASTransport(
		vc_AMF_UE_ID,
		vc_RAN_UE_ID,
		?
		))) -> value v_PDU {
		f_NGAPPDU_Get(v_PDU);
		f_NASPDU_Get(vc_recvNGAP_PDU);
		if (vc_recvNAS_PDU == v_cucPdu) {
		t_observation.stop;
		setverdict(fail, "* " & __SCOPE__ & ": FAIL: the NITZ-only CONFIGURATION UPDATE COMMAND is retransmitted after " & float2str(PX_CUC_TWAIT - t_observation.read) & " s *");
		} else if (f_Check_5GAKA_NAS_DL_Message(vc_recvNAS_PDU, mw_NG_CONFIGURATION_UPDATE_COMMAND, vc_ng_nas_security_params_type, vc_previous_nas_count_dl, v_message, vc_inner_message)) {
		t_observation.stop;
		setverdict(fail, "* " & __SCOPE__ & ": FAIL: CONFIGURATION UPDATE COMMAND sent again without acknowledgement requested *");
		} else {
		log("* " & __SCOPE__ & ": INFO: other DOWNLINK NAS TRANSPORT, ignored *");
		repeat;
		}
		}
		[] t_observation.timeout {
		log("* " & __SCOPE__ & ": PASS: no retransmission of the CONFIGURATION UPDATE COMMAND during ", PX_CUC_TWAIT, " s *");
		setverdict(pass);
		}
		}
		}
		f_selfOrClientSyncAndVerdict(c_tbDone, f_getVerdict());
		log("* " & __SCOPE__ & ": INFO: Testbody done. *");

		// Postamble: release of the UE context (no PDU session: the IUT answers nas normal-release)
		f_postamble_NGAP_AMF(m_cause_nas(normal_release));
		f_selfOrClientSyncAndVerdict(c_poDone, f_getVerdict());
		log("* " & __SCOPE__ & ": INFO: Postamble done. *");
		} // End of function f_TC_5GNAS_AMF_CNF_COM_01

		} // End of group /5_4_2_/Security_mode_control_procedure

ttcn/Ats_NG_NAS/NG_NAS_TestControl.ttcn

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Changes for ttcn/Ats_NG_NAS/NG_NAS_TestControl.ttcn: 2 added lines, 0 removed lines.
Original line number	Diff line number	Diff line
		@@ -34,6 +34,8 @@ module NG_NAS_TestControl {

		execute(TC_5GNAS_AMF_IDN_REQ_01());

		execute(TC_5GNAS_AMF_CNF_COM_01());

		execute(TC_5GNAS_AMF_DLN_ACC_01());

		execute(TC_5GNAS_AMF_REG_ACC_01());