Validate the sequence TC_NGAP_AMF_PDU_02 & TC_NGAP_AMF_PDU_02_2 (41cd9f21) · Commits · INT - Core Network and Interoperability Testing / 5G Core / NAS

captures/TC_NGAP_AMF_PDU_02.pcap

+11.4 KiB (16.5 KiB)

File changed.

No diff preview for this file type.

View original file

View changed file

captures/TC_NGAP_AMF_PDU_02_2.pcap

+9.17 KiB (16.3 KiB)

File changed.

No diff preview for this file type.

View original file

View changed file

ttcn/AtsNGAP/NGAP_Steps.ttcn

+35 −9

Changes for ttcn/AtsNGAP/NGAP_Steps.ttcn: 35 added lines, 9 removed lines.
Original line number	Diff line number	Diff line
		@@ -729,10 +729,13 @@ module NGAP_Steps { // TODO FSCOM f_xxx_UE_SecurityMode to be mmoved into NAG_NG
		* (test system = gNB and UE, PICS_USE_GTPU).
		* @details The test system sends ICMP echo requests from the UE (vc_ueIpv4Address) to PX_DN_PING_HOST in G-PDUs on
		* the UL tunnel of the UPF (vc_ulGtpTunnel, QoS flow PX_QOS_FLOW_IDENTIFIER), and awaits, for up to
		* PX_TNOAC, the echo replies in G-PDUs on the DL tunnel it gave in the PDU SESSION RESOURCE SETUP RESPONSE
		* PX_TNOAC after the last one, the echo replies in G-PDUs on the DL tunnel it gave in the PDU SESSION RESOURCE SETUP RESPONSE
		* (PX_GTP_TEID), or moved to afterwards (p_dlTeid, e.g. by a PDU SESSION RESOURCE MODIFY INDICATION). A reply on
		* that tunnel shows that the tunnel reached the UPF (AMF, then SMF). The G-PDUs go to the UDP destination of
		* the N3 port configuration, which should be the address of the UL tunnel.
		* the N3 port configuration, which should be the address of the UL tunnel. The requests are spaced by
		* c_echoInterval, as ping does: the 5GC may install the DL tunnel in the UPF only after the PDU SESSION
		* RESOURCE SETUP RESPONSE (e.g. free5GC, PFCP session modification), so replies to the first requests can be
		* lost. The check ends with the reply to the last request.
		* @param p_count The number of echo requests.
		* @param p_dlTeid The DL tunnel TEID of the gNB where the replies are awaited.
		* @return true if at least one echo reply came back on the DL tunnel, or if the check is not configured
		@@ -744,7 +747,11 @@ module NGAP_Steps { // TODO FSCOM f_xxx_UE_SecurityMode to be mmoved into NAG_NG
		var octetstring v_source, v_destination, v_icmp;
		var integer v_protocol;
		var integer v_replies := 0;
		var integer v_sent := 0;
		var integer v_seq;
		const float c_echoInterval := 1.0; // Seconds between two echo requests
		timer t_reply := PX_TNOAC;
		timer t_next := c_echoInterval;

		if (not PICS_USE_GTPU or (PX_DN_PING_HOST == "")) {
		log("* " & __SCOPE__ & ": INFO: no user plane check (PICS_USE_GTPU false or no PX_DN_PING_HOST) *");
		@@ -758,25 +765,44 @@ module NGAP_Steps { // TODO FSCOM f_xxx_UE_SecurityMode to be mmoved into NAG_NG
		log("f_NGAP_amf_check_user_plane: ", p_count, " echo request(s) from ", f_ipv4_toString(vc_ueIpv4Address), " to ", PX_DN_PING_HOST,
		" on the UL tunnel ", f_ipv4_toString(bit2oct(vc_ulGtpTunnel.transportLayerAddress)), "/", vc_ulGtpTunnel.gTP_TEID,
		", replies awaited on the DL tunnel ", f_ipv4_toString(bit2oct(PX_TRANSPORT_LAYER_ADDRESS)), "/", p_dlTeid);
		for (var integer i := 1; i <= p_count; i := i + 1) {
		// First echo request; the next ones every c_echoInterval (t_next), then PX_TNOAC for the last replies (t_reply)
		N3_P.send(m_gtpu_gPdu_ul(vc_ulGtpTunnel.gTP_TEID, PX_QOS_FLOW_IDENTIFIER,
		f_ipv4_icmpEchoRequest(vc_ueIpv4Address, v_host, 21588 /* 'TT' */, i)));
		}
		f_ipv4_icmpEchoRequest(vc_ueIpv4Address, v_host, 21588 /* 'TT' */, 1)));
		v_sent := 1;
		if (v_sent < p_count) {
		t_next.start;
		} else {
		t_reply.start;
		}
		alt {
		[] N3_P.receive(mw_gtpu_gPdu(p_dlTeid)) -> value v_gtpu {
		if (f_ipv4_getHeader(v_gtpu.payload, v_source, v_destination, v_protocol, v_icmp)
		and (v_protocol == 1) and (lengthof(v_icmp) >= 8) and (v_icmp[0] == '00'O)
		and (v_source == v_host) and (v_destination == vc_ueIpv4Address)) {
		v_replies := v_replies + 1;
		log("f_NGAP_amf_check_user_plane: echo reply ", oct2int(substr(v_icmp, 6, 2)), " on the DL tunnel");
		v_seq := oct2int(substr(v_icmp, 6, 2));
		log("f_NGAP_amf_check_user_plane: echo reply ", v_seq, " on the DL tunnel");
		if (v_seq == p_count) { // The reply to the last request: done
		t_next.stop;
		t_reply.stop;
		} else {
		log("f_NGAP_amf_check_user_plane: other G-PDU on the DL tunnel: ", v_gtpu);
		repeat;
		}
		if (v_replies < p_count) {
		} else {
		log("f_NGAP_amf_check_user_plane: other G-PDU on the DL tunnel: ", v_gtpu);
		repeat;
		}
		t_reply.stop;
		}
		[] t_next.timeout {
		v_sent := v_sent + 1;
		N3_P.send(m_gtpu_gPdu_ul(vc_ulGtpTunnel.gTP_TEID, PX_QOS_FLOW_IDENTIFIER,
		f_ipv4_icmpEchoRequest(vc_ueIpv4Address, v_host, 21588 /* 'TT' */, v_sent)));
		if (v_sent < p_count) {
		t_next.start;
		} else {
		t_reply.start;
		}
		repeat;
		}
		[] N3_P.receive(mw_gtpu_any) -> value v_gtpu {
		log("f_NGAP_amf_check_user_plane: other GTP-U message: ", v_gtpu);