Change in osmo-ttcn3-hacks[master]: msc: add TC_cmserv_tmsi_unknown()

[neels]

neels has uploaded this change for review. ( https://gerrit.osmocom.org/c/osmo-ttcn3-hacks/+/19719 )


Change subject: msc: add TC_cmserv_tmsi_unknown()
......................................................................

msc: add TC_cmserv_tmsi_unknown()

We already have TC_cmserv_imsi_unknown, but lack a test that shows CM Service
Request behavior for an unknown TMSI.

Looking at OS#4721 I vaguely expected an ID Request to also happen during CM
Service Request, but instead we reject the unknown TMSI completely, and require
the MS to perform a proper LU subsequently.

Related: OS#4721
Change-Id: I54e5efcf4c31625205c99338379a2055633acde9
---
M msc/MSC_Tests.ttcn
1 file changed, 38 insertions(+), 0 deletions(-)



  git pull ssh://gerrit.osmocom.org:29418/osmo-ttcn3-hacks refs/changes/19/19719/1

diff --git a/msc/MSC_Tests.ttcn b/msc/MSC_Tests.ttcn
index 6a2f01b..be8bf77 100644
--- a/msc/MSC_Tests.ttcn
+++ b/msc/MSC_Tests.ttcn
@@ -673,6 +673,44 @@
 }
 
 
+/* Send CM SERVICE REQ for TMSI that has never performed LU before */
+friend function f_tc_cmserv_tmsi_unknown(charstring id, BSC_ConnHdlrPars pars)
+runs on BSC_ConnHdlr {
+	f_init_handler(pars);
+
+	var MobileIdentityLV mi := valueof(ts_MI_TMSI_LV('57111111'O));
+	var BSSMAP_IE_CellIdentifier cell_id := valueof(ts_CellId_CGI('262'H, '42'H, 23, 42));
+	var PDU_ML3_MS_NW l3_info := valueof(ts_CM_SERV_REQ(CM_TYPE_MO_CALL, mi));
+
+	/* Send BSSAP_Conn_Req with COMPL L3 INFO to MSC */
+	f_cl3_or_initial_ue(l3_info);
+	f_mm_auth();
+
+	timer T := 10.0;
+	T.start;
+	alt {
+	[] BSSAP.receive(tr_PDU_DTAP_MT(tr_CM_SERV_REJ)) { }
+	//[] BSSAP.receive(tr_PDU_DTAP_MT(tr_CM_SERV_ACC)) { }
+	[] BSSAP.receive {
+		setverdict(fail, "Received unexpected BSSAP");
+		mtc.stop;
+		}
+	[] T.timeout {
+		setverdict(fail, "Timeout waiting for CM SERV REJ");
+		mtc.stop;
+		}
+	}
+
+	f_expect_clear();
+}
+testcase TC_cmserv_tmsi_unknown() runs on MTC_CT {
+	var BSC_ConnHdlr vc_conn;
+	f_init();
+	vc_conn := f_start_handler(refers(f_tc_cmserv_tmsi_unknown), 57, verify_cell_id := false);
+	vc_conn.done;
+}
+
+
 friend function f_tc_lu_and_mo_call(charstring id, BSC_ConnHdlrPars pars) runs on BSC_ConnHdlr {
 	f_init_handler(pars);
 	var CallParameters cpars := valueof(t_CallParams);

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Gerrit-Project: osmo-ttcn3-hacks
Gerrit-Branch: master
Gerrit-Change-Id: I54e5efcf4c31625205c99338379a2055633acde9
Gerrit-Change-Number: 19719
Gerrit-PatchSet: 1
Gerrit-Owner: neels <nhofmeyr at sysmocom.de>
Gerrit-MessageType: newchange
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