TC_s1ap_attach: setup S11 interface, catch Create Session Request

The testcase TC_s1ap_attach is not complete yet. Since the testsuite
lacked the S11 interface, it was not possible to develop the testcase
beond the S1AP/NAS-EPS Security Mode Command. However, the S11 interface
is now available to the testsuite, so let's show that it works by
catching the Create Session Request. Let's also put a TODO that the
testcase needs to be completed still.

Related: OS#5760
Change-Id: I6350a3d5cab33fa4f43e4cdcbd7bf3241821d233

1 files changed, 21 insertions, 1 deletions

diff --git a/mme/MME_Tests.ttcn b/mme/MME_Tests.ttcn
index 104c3d20..3af72bcf 100644
--- a/mme/MME_Tests.ttcn
+++ b/mme/MME_Tests.ttcn
@@ -620,6 +620,8 @@ private function f_TC_attach(ConnHdlrPars pars) runs on ConnHdlr {
 	f_init_handler(pars);
 	var template (value) EPS_MobileIdentityV mi := ts_NAS_MobileId_IMSI(pars.ue_pars.imsi);
 	var template (value) PDU_NAS_EPS nas_esm, nas_emm;
+	timer T := 5.0;
+
 /*
 	nas_esm := ts_NAS_ActDefEpsBearCtxReq(bearer_id := '0000'B, proc_tid := int2bit(1,8),
 					      qos := c_NAS_defaultQoS, apn := c_NAS_defaultAPN,
@@ -648,7 +650,24 @@ private function f_TC_attach(ConnHdlrPars pars) runs on ConnHdlr {
 		}
 	}
 
-	f_sleep(10.0);
+	/* We now expect the MME to send a Create Session Request to the SGW-C */
+	/* TODO: be more restrictive, fix and use tr_GTP2C_CreateSessionReq */
+	f_gtp2_register_udmsg('20'O);
+	T.start;
+	alt {
+	[] GTP2.receive(tr_PDU_GTP2C) {
+		setverdict(pass);
+		}
+	[] GTP2.receive {
+		setverdict(fail, "unexpected GTPv2/S11 message from MME");
+		}
+	[] T.timeout {
+		setverdict(fail, "no message from MME");
+		}
+	}
+
+	/* TODO: Finish this procedure until Attach Complete */
+
 }
 testcase TC_s1ap_attach() runs on MTC_CT {
 	var charstring id := testcasename();
@@ -656,6 +675,7 @@ testcase TC_s1ap_attach() runs on MTC_CT {
 	f_init_diameter(id);
 	f_sleep(10.0);
 	f_init_s1ap(id, 4);
+	f_init_gtpv2_s11(id);
 	f_s1ap_setup(0);
 
 	var ConnHdlrPars pars := f_init_pars(ue_idx := 0);