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sgsn: Introduce test TC_attach_req_id_req_ra_update 

The scenario in this test triggers a crash in osmo-sgsn fixed by
osmo-sgsn.git I64fa5cf1b427d3abb99e553e584897261a827ce6.

With that osmo-sgsn patch applied, the process doesn't crash anymore but
the test still fails due to an XID message being sent with a new
yet-not-seen-by-ttcn3 TLLI and as a result TTCN3 BSSGP_Emulation fails:
BSSGP_Emulation.ttcn:390 setverdict(fail): none -> fail reason: "Couldn't find Component for TLLI 'FE791757'O", new component reason: "Couldn't find Component for TLLI 'FE791757'O"

Other than that, the test runs fine. It still needs to be clarified
whether the new TLLI sent by osmo-sgsn is expected and test needs to be
fixed, or whether it's an sgsn bug.

Related: OS#3957, OS#4245
Change-Id: Id5554a91a8bda712e282c5a3e9e30fb0ca1ec0e8
This commit is contained in:
Pau Espin 2019-11-08 18:32:28 +01:00 committed by laforge
parent b26196be09
commit ce571b5cc4
2 changed files with 41 additions and 1 deletions
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41
sgsn/SGSN_Tests.ttcn
View File

@ -1070,7 +1070,7 @@ private function f_TC_rau_unknown(charstring id) runs on BSSGP_ConnHdlr {
f_send_l3(ts_GMM_RAU_REQ(f_mi_get_lv(), GPRS_UPD_T_RA, old_ra, false, omit, omit));
alt {
[] BSSGP[0].receive(tr_GMM_RAU_REJECT('0a'O)) {
[] BSSGP[0].receive(tr_GMM_RAU_REJECT('0a'O)) { /* gmm cause: implicitly detached */
setverdict(pass);
}
/* FIXME: Expect XID RESET? */
@ -2814,6 +2814,42 @@ testcase TC_attach_pdp_act_gmm_detach() runs on test_CT {
f_cleanup();
}
private function f_TC_attach_req_id_req_ra_update(charstring id) runs on BSSGP_ConnHdlr {
var RoutingAreaIdentificationV old_ra := f_random_RAI();
var RoutingAreaIdentificationV new_ra := f_random_RAI();
while (old_ra == new_ra) { new_ra := f_random_RAI(); };
var template PDU_L3_MS_SGSN attach_req := ts_GMM_ATTACH_REQ(f_mi_get_lv(), old_ra, false, false, omit, omit);
var PDU_L3_SGSN_MS l3_mt;
f_send_l3(attach_req, 0);
BSSGP[0].receive(tr_GMM_ID_REQ(?));
f_send_l3(ts_GMM_RAU_REQ(f_mi_get_lv(), GPRS_UPD_T_RA, new_ra, false, omit, omit));
alt {
[] BSSGP[0].receive(tr_GMM_RAU_REJECT('0a'O)) {
setverdict(pass);
}
[] BSSGP[0].receive { repeat; }
}
}
/* This test triggers crash in osmo-sgsn before osmo-sgsn.git I64fa5cf1b427d3abb99e553e584897261a827ce6.
* See OS#3957 and OS#4245 for more information.
*/
testcase TC_attach_req_id_req_ra_update() runs on test_CT {
/*
* MS --> SGSN: Attach Req (TMSI, RAI=901-70-356-101)
* MS <-- SGSN: Identity Request (IMEI)
* MS --> SGSN: RA Updating (RAI=901-70-2758-208)
*/
var BSSGP_ConnHdlr vc_conn;
f_init();
vc_conn := f_start_handler(refers(f_TC_attach_req_id_req_ra_update), testcasename(), g_gb, 47);
vc_conn.done;
f_cleanup();
}
control {
execute( TC_attach() );
execute( TC_attach_mnc3() );
@ -2870,6 +2906,9 @@ control {
execute( TC_llc_null() );
execute( TC_llc_sabm_dm_llgmm() );
execute( TC_llc_sabm_dm_ll5() );
/* At the end, may crash osmo-sgsn, see OS#3957, OS#4245 */
execute( TC_attach_req_id_req_ra_update() );
}

1
sgsn/expected-results.xml
View File

@ -62,4 +62,5 @@
<testcase classname='SGSN_Tests' name='TC_attach_pdp_act_deact_gtp_retrans_resp' time='MASKED'/>
<testcase classname='SGSN_Tests' name='TC_attach_pdp_act_user_error_ind_ggsn' time='MASKED'/>
<testcase classname='SGSN_Tests' name='TC_attach_gmm_attach_req_while_gmm_attach' time='MASKED'/>
<testcase classname='SGSN_Tests' name='TC_attach_req_id_req_ra_update' time='MASKED'/>
</testsuite>