lynxis lazus has uploaded this change for review.

View Change

sgsn: add TC_attach_gmm_attach_req_while_gmm_attach_changed

Add a TC to to simulate multiple GMM Attach with a different
content.
When receiving a GMM Attach while in an Attach, but with a different
message, the old GMM Attach should be discard silently and a new
GMM Attach procedure should be initiated.

Change-Id: Ia721d3c29bf09014b197670ae02d1cd1901750bc
---
M sgsn/SGSN_Tests.ttcn
1 file changed, 70 insertions(+), 0 deletions(-)

git pull ssh://gerrit.osmocom.org:29418/osmo-ttcn3-hacks refs/changes/56/39256/1

diff --git a/sgsn/SGSN_Tests.ttcn b/sgsn/SGSN_Tests.ttcn
index 71b55c7..6f9f648 100644
--- a/sgsn/SGSN_Tests.ttcn
+++ b/sgsn/SGSN_Tests.ttcn
@@ -2171,6 +2171,75 @@
 	f_cleanup();
 }
 
+/* Do a Attach Req with P-TMSI, on ID Req, change Attach Req, should terminate the procedure and do it again */
+private function f_TC_attach_gmm_attach_req_while_gmm_attach_changed(charstring id) runs on BSSGP_ConnHdlr {
+	var integer count_req := 0;
+	var MobileL3_CommonIE_Types.MobileIdentityLV mi;
+	var RoutingAreaIdentificationV rand_rai := f_random_RAI();
+	var PDU_L3_SGSN_MS l3_mt;
+
+	g_pars.vec := f_gen_auth_vec_3g();
+	g_pars.p_tmsi := f_random_ptmsi(suffix := '01'O);
+
+	f_send_l3(ts_GMM_ATTACH_REQ(f_mi_get_lv(), rand_rai, true, false, omit, omit));
+
+	alt {
+		[] BSSGP[0].receive(tr_GMM_ATTACH_REJECT(?)) {
+			setverdict(fail, "Unexpected GMM ATTACH REJECT");
+			mtc.stop;
+		}
+		[] BSSGP[0].receive(tr_GMM_ID_REQ('001'B)) {
+			mi := valueof(ts_MI_IMSI_LV(g_pars.imsi));
+			/* Changing the GMM Attach Req to reset the GMM Attach procedure */
+			f_send_l3(ts_GMM_ATTACH_REQ(f_mi_get_lv(), rand_rai, true, false, omit, omit,
+						    p_tmsi_type := ts_PtmsiTypeTV(c_GMM_PMTSI_TYPE_NATIVE)));
+		}
+	}
+
+	alt {
+		[] BSSGP[0].receive(tr_GMM_ATTACH_REJECT(?)) {
+			setverdict(fail, "Unexpected GMM ATTACH REJECT");
+			mtc.stop;
+		}
+		[] BSSGP[0].receive(tr_GMM_ID_REQ('001'B)) {
+			mi := valueof(ts_MI_IMSI_LV(g_pars.imsi));
+			f_send_l3(ts_GMM_ID_RESP(mi));
+			repeat;
+		}
+		[] as_gmm_auth(umts_aka_challenge := true, expect_sai := true) { repeat; };
+		[] as_gmm_gsup_lu_isd() { repeat; };
+		[] BSSGP[0].receive(tr_GMM_ATTACH_ACCEPT('001'B, ?, ?)) -> value l3_mt {
+			f_process_attach_accept(l3_mt.msgs.gprs_mm.attachAccept);
+			f_send_l3(ts_GMM_ATTACH_COMPL);
+			setverdict(pass);
+			/* FIXME: Extract P-TMSI, if any. Only send Complete if necessary */
+		}
+	}
+}
+
+/* Do a Attach Req with P-TMSI, on ID Req, change Attach Req */
+testcase TC_attach_gmm_attach_req_while_gmm_attach_changed() runs on test_CT {
+	/* Testing if the SGSN ignore Attach Request with the exact same content */
+	/* MS -> SGSN: Attach Request TMSI
+	 * MS <- SGSN: Identity Request IMSI
+	 * MS -> SGSN: Attach Request (2nd)
+	 * MS <- SGSN: Identity Request IMSI (retrans)
+	 * SGSN -> HLR: SAI Request
+	 * SGSN <- HLR: SAI Response
+	 * MS <- SGSN: Auth Req
+	 * MS <- SGSN: Auth Resp
+	 * SGSN <-> HLR: ULA/ISD
+	 * MS <- SGSN: Attach Accept
+	 * MS -> SGSN: Attach Complete
+	 */
+	var BSSGP_ConnHdlr vc_conn;
+	f_init();
+	f_sleep(1.0);
+	vc_conn := f_start_handler(refers(f_TC_attach_gmm_attach_req_while_gmm_attach_changed), testcasename(), g_gb, 39);
+	vc_conn.done;
+	f_cleanup();
+}
+
 
 private function f_TC_attach_usim_resync(charstring id) runs on BSSGP_ConnHdlr {
 	var RoutingAreaIdentificationV old_ra := f_random_RAI();
@@ -3460,6 +3529,7 @@
 	execute( TC_attach_pdp_act_gmm_detach() );
 	execute( TC_attach_gmm_attach_req_while_gmm_attach() );
 	execute( TC_attach_gmm_attach_req_while_gmm_attach_retransmit() );
+	execute( TC_attach_gmm_attach_req_while_gmm_attach_changed() );
 
 	execute( TC_xid_empty_l3() );
 	execute( TC_xid_n201u() );

To view, visit change 39256. To unsubscribe, or for help writing mail filters, visit settings.