[S] Change in osmo-ttcn3-hacks[master]: C5G: Release UE Context before sending Service request

[jolly]

jolly has uploaded this change for review. ( 
https://gerrit.osmocom.org/c/osmo-ttcn3-hacks/+/42775?usp=email )


Change subject: C5G: Release UE Context before sending Service request
......................................................................

C5G: Release UE Context before sending Service request

A recent fix in Open5GS rejects RAN_UE_NGAP_ID in InitialUEMessage. This
causes all tests to fail that send a subsequent InitialUEMessage with
the same RAN_UE_NGAP_ID.

Release the UE Context before re-using the RAN_UE_NGAP_ID, because the
connection handler can only handle one context at a time.

Note that the AMF_UE_NGAP_ID is incremented by Open5GS for every
context.

This fixes:
    TC_ue_service_request_cm_idle_inact_sess
    TC_ue_service_request_cm_idle_ul_data
    TC_ue_service_request_cm_idle_unknown_sess_active

Related: Open5GS Issues #4481
Change-Id: If6fae56487aebd810c51cbab170d95d5dec7e138
---
M 5gc/C5G_Tests.ttcn
1 file changed, 14 insertions(+), 1 deletion(-)



  git pull ssh://gerrit.osmocom.org:29418/osmo-ttcn3-hacks 
refs/changes/75/42775/1

diff --git a/5gc/C5G_Tests.ttcn b/5gc/C5G_Tests.ttcn
index f1c46c8..a89d023 100644
--- a/5gc/C5G_Tests.ttcn
+++ b/5gc/C5G_Tests.ttcn
@@ -579,11 +579,14 @@

        f_register();
        f_pdu_sess_establish(configure_userplane := false);
+       f_sleep(1.0);
+       f_ue_context_release();
+       f_sleep(1.0);
        pdu_session_status := f_PDU_SessionStatus();
        f_service_request_cm_idle(ul_data_status := pdu_session_status,
                                  pdu_sess_status := pdu_session_status);

-       as_ngap_handle_PDUSessionResourceSetupReq();
+       as_ngap_handle_InitialCtxReq_withPDUSessionList();

        NGAP.receive(cr_NG_SERVICE_ACCEPT(p_PDU_SessionStatus := 
cr_PDU_SessionStatus('00000010'B, '00000000'B)));

@@ -602,9 +605,15 @@
 /* 3GPP TS 23.502 4.2.3.2 UE Triggered Service Request.
  * UE signals that the active session is now inactive. AMF sends a PFCP 
Session Delete to SMF. */
 private function f_TC_ue_service_request_cm_idle_inact_sess() runs on ConnHdlr 
{
+       var NGAP_PDU rx_ngap;
+
        f_register();
        f_pdu_sess_establish(configure_userplane := false);
+       f_sleep(1.0);
+       f_ue_context_release();
+       f_sleep(1.0);
        f_service_request_cm_idle(pdu_sess_status := 
cs_PDU_SessionStatus('00000000'B, '00000000'B));
+       g_pars.ue_pars.amf_id := g_pars.ue_pars.amf_id + 1;
        NGAP.receive(cr_NG_SERVICE_ACCEPT(p_PDU_SessionStatus := 
cr_PDU_SessionStatus('00000000'B, '00000000'B)));
        f_deregister();
 }
@@ -622,7 +631,11 @@
  * UE signals that a session unknown to network is active: */
 private function f_TC_ue_service_request_cm_idle_unknown_sess_active() runs on 
ConnHdlr {
        f_register();
+       f_sleep(1.0);
+       f_ue_context_release();
+       f_sleep(1.0);
        f_service_request_cm_idle(pdu_sess_status := 
cs_PDU_SessionStatus('00000010'B, '00000000'B));
+       g_pars.ue_pars.amf_id := g_pars.ue_pars.amf_id + 1;
        NGAP.receive(cr_NG_SERVICE_ACCEPT(p_PDU_SessionStatus := 
cr_PDU_SessionStatus('00000000'B, '00000000'B)));
        f_deregister();
 }

--
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Gerrit-MessageType: newchange
Gerrit-Project: osmo-ttcn3-hacks
Gerrit-Branch: master
Gerrit-Change-Id: If6fae56487aebd810c51cbab170d95d5dec7e138
Gerrit-Change-Number: 42775
Gerrit-PatchSet: 1
Gerrit-Owner: jolly <andr...@eversberg.eu>