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5gc: Introduce test TC_periodic_registration_updating

Related: SYS#7073
Change-Id: I63da25a3927cb459563d4325adc690beb8a67451
---
M 5gc/C5G_Tests.ttcn
M 5gc/ConnHdlr.ttcn
M 5gc/expected-results.xml
3 files changed, 50 insertions(+), 3 deletions(-)

git pull ssh://gerrit.osmocom.org:29418/osmo-ttcn3-hacks refs/changes/99/40799/1

diff --git a/5gc/C5G_Tests.ttcn b/5gc/C5G_Tests.ttcn
index 9eb6f30..30615f2 100644
--- a/5gc/C5G_Tests.ttcn
+++ b/5gc/C5G_Tests.ttcn
@@ -92,7 +92,8 @@
 	cn_gtpu_ip := omit,
 	cn_gtpu_teid := omit,
 	qfi := omit,
-	ue_ip := omit
+	ue_ip := omit,
+	guti := omit
 }
 
 type component MTC_CT {
@@ -301,6 +302,20 @@
 	vc_conn.done;
 }
 
+private function f_TC_periodic_registration_updating() runs on ConnHdlr {
+	f_register();
+	f_periodic_register_update();
+}
+testcase TC_periodic_registration_updating() runs on MTC_CT {
+	f_init();
+	f_ngap_setup(0);
+
+	var ConnHdlrPars pars := f_init_pars(ue_idx := 0);
+	var ConnHdlr vc_conn;
+	vc_conn := f_start_handler_with_pars(refers(f_TC_periodic_registration_updating), pars);
+	vc_conn.done;
+}
+
 private function f_TC_register_ping4() runs on ConnHdlr {
 	f_register();
 	f_pdu_sess_establish();
@@ -340,6 +355,7 @@
 	execute( TC_ng_setup_unknown_global_gnb_id_plmn() );
 	execute( TC_ng_setup_wrong_tac() );
 	execute( TC_ng_register() );
+	execute( TC_periodic_registration_updating() );
 	execute( TC_ng_register_ping4() );
 	execute( TC_ng_register_ping4_256() );
 }
diff --git a/5gc/ConnHdlr.ttcn b/5gc/ConnHdlr.ttcn
index 144b00b..fe96b45 100644
--- a/5gc/ConnHdlr.ttcn
+++ b/5gc/ConnHdlr.ttcn
@@ -79,7 +79,8 @@
 	charstring cn_gtpu_ip optional,
 	OCT4 cn_gtpu_teid optional,
 	OCT1 qfi optional,
-	charstring ue_ip optional
+	charstring ue_ip optional,
+	octetstring guti optional
 };
 
 type record RunProgParams {
@@ -388,6 +389,35 @@
 	as_ngap_handle_sec_mode();
 
 	NGAP.receive(cr_NG_REGISTRATION_ACCEPT) -> value rx_nas;
+	g_pars.ue_pars.guti := rx_nas.registration_Accept.guti.otherDigits;
+	NGAP.send(cs_NG_REGISTRATION_COMPLETE);
+
+	as_ngap_handle_configuration_update();
+}
+
+function f_periodic_register_update() runs on ConnHdlr {
+	var template (value) NG_NAS_UL_Message_Type nas_ul_msg;
+	var NG_NAS_DL_Message_Type rx_nas;
+
+	nas_ul_msg := cs_NG_REGISTRATION_REQUEST(cs_RegistrationType(tsc_NG_RegistrationPeriodic, '1'B),
+						 g_pars.kset_id.nasKeySetId,
+						 g_pars.kset_id.tsc,
+						 cs_NG_MobileIdentity_Guti(omit, g_pars.ue_pars.guti),
+						 p_UESecurityCap := f_UE_SecurityCapability());
+	NGAP.send(nas_ul_msg);
+
+	/* Expect updated KSI from network following 5G Core standards
+	* (open5gs.git 70310979c58fe186e9eaa06bec9d9a31f24ff7a1): */
+	if (g_pars.kset_id.nasKeySetId != tsc_NasKsi_NoKey) {
+		if (g_pars.kset_id.nasKeySetId == '110'B) {
+			g_pars.kset_id.nasKeySetId := '000'B;
+		} else {
+			g_pars.kset_id.nasKeySetId := int2bit(bit2int(g_pars.kset_id.nasKeySetId) + 1, 3);
+		}
+	}
+
+	NGAP.receive(cr_NG_REGISTRATION_ACCEPT) -> value rx_nas;
+	g_pars.ue_pars.guti := rx_nas.registration_Accept.guti.otherDigits;
 	NGAP.send(cs_NG_REGISTRATION_COMPLETE);
 
 	as_ngap_handle_configuration_update();
diff --git a/5gc/expected-results.xml b/5gc/expected-results.xml
index 98dee58..a94eb6f 100644
--- a/5gc/expected-results.xml
+++ b/5gc/expected-results.xml
@@ -1,9 +1,10 @@
 <?xml version="1.0"?>
-<testsuite name='Titan' tests='1' failures='0' errors='0' skipped='0' inconc='0' time='MASKED'>
+<testsuite name='Titan' tests='7' failures='0' errors='0' skipped='0' inconc='0' time='MASKED'>
   <testcase classname='C5G_Tests' name='TC_ng_setup_unknown_global_gnb_id_plmn' time='MASKED'/>
   <testcase classname='C5G_Tests' name='TC_ng_setup_wrong_tac' time='MASKED'/>
   <testcase classname='C5G_Tests' name='TC_ng_setup' time='MASKED'/>
   <testcase classname='C5G_Tests' name='TC_ng_register' time='MASKED'/>
+  <testcase classname='C5G_Tests' name='TC_periodic_registration_updating' time='MASKED'/>
   <testcase classname='C5G_Tests' name='TC_ng_register_ping4' time='MASKED'/>
   <testcase classname='C5G_Tests' name='TC_ng_register_ping4_256' time='MASKED'/>
 </testsuite>

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