lynxis lazus has uploaded this change for review. (
https://gerrit.osmocom.org/c/osmo-ttcn3-hacks/+/39255?usp=email )
Change subject: SGSN: add TC_attach_gmm_attach_req_while_gmm_attach_retransmit
......................................................................
SGSN: add TC_attach_gmm_attach_req_while_gmm_attach_retransmit
Extend the TC_attach_gmm_attach_req_while_gmm_attach
by "loosing" an ID Req message.
Change-Id: I8d208c0a98675238dba439ab3e75758293928588
---
M sgsn/SGSN_Tests.ttcn
1 file changed, 89 insertions(+), 4 deletions(-)
git pull ssh://gerrit.osmocom.org:29418/osmo-ttcn3-hacks
refs/changes/55/39255/1
diff --git a/sgsn/SGSN_Tests.ttcn b/sgsn/SGSN_Tests.ttcn
index f8b9213..71b55c7 100644
--- a/sgsn/SGSN_Tests.ttcn
+++ b/sgsn/SGSN_Tests.ttcn
@@ -2073,10 +2073,11 @@
* MS <- SGSN: Identity Request IMSI
* MS -> SGSN: Identity Response IMSI
* MS -> SGSN: Attach Request (2nd)
- * SGS -> HLR: SAI Request
- * SGS <- HLR: SAI Response
- * MS <- SGSN: Identity Request IMEI
- * MS -> SGSN: Identity Response IMEI
+ * 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
*/
@@ -2088,6 +2089,89 @@
f_cleanup();
}
+/* The main difference to f_TC_attach_gmm_attach_req_while_gmm_attach is the
*lost* of the first ID Req */
+private function
f_TC_attach_gmm_attach_req_while_gmm_attach_retransmit(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));
+ 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));
+ f_send_l3(ts_GMM_ID_RESP(mi));
+ repeat;
+ }
+ [] BSSGP[0].receive(tr_GMM_ID_REQ('010'B)) {
+ /* send out a second GMM_Attach Request.
+ * If the SGSN follows the rules, this 2nd ATTACH REQ
should be ignored, because
+ * of the same content */
+ mi := valueof(ts_MI_IMEI_LV(g_pars.imei));
+ repeat;
+ }
+ [] as_gmm_auth(umts_aka_challenge := true, expect_sai := true)
{};
+ }
+ f_sleep(1.0);
+
+ /* we've sent already a IMEI answer, we should NOT asked again for IMEI
*/
+ alt {
+ [] as_gmm_gsup_lu_isd() { repeat; };
+ [] BSSGP[0].receive(tr_GMM_ATTACH_REJECT(?)) {
+ setverdict(fail, "Unexpected GMM ATTACH REJECT");
+ mtc.stop;
+ }
+ [] 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 */
+ }
+ }
+}
+
+testcase TC_attach_gmm_attach_req_while_gmm_attach_retransmit() 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_retransmit),
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();
@@ -3375,6 +3459,7 @@
execute( TC_attach_pdp_act_user_error_ind_ggsn() );
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_xid_empty_l3() );
execute( TC_xid_n201u() );
--
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Gerrit-MessageType: newchange
Gerrit-Project: osmo-ttcn3-hacks
Gerrit-Branch: master
Gerrit-Change-Id: I8d208c0a98675238dba439ab3e75758293928588
Gerrit-Change-Number: 39255
Gerrit-PatchSet: 1
Gerrit-Owner: lynxis lazus <[email protected]>
