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osmo-ttcn3-hacks
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sgsn: Introduce tests for several cell change related scenarios 

Test TC_cell_change_different_ci_data provides test case for
fix in osmo-sgsn.git Change-Id I2c14e1d65575f54212924f7c5f0a2f4c1b76ec81

Related: SYS#4909
Change-Id: I2158685bf817d4bf064bb4d2ef5aa96ca252fe21
This commit is contained in:
Pau Espin 2021-02-12 17:43:35 +01:00
parent c56800066d
commit 7c05216e01
1 changed files with 151 additions and 7 deletions
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158
sgsn/SGSN_Tests.ttcn
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@ -371,7 +371,7 @@ function f_init(BcdMccMnc mcc_mnc := '262F42'H) runs on test_CT {
}
}
};
g_gb[2].cfg := {
g_gb[2].cfg := { /* [2] configured to have same RAC as [1] */
nsei := 98,
sgsn_role := false,
bvc := {
@ -381,7 +381,7 @@ function f_init(BcdMccMnc mcc_mnc := '262F42'H) runs on test_CT {
ra_id := {
lai := {
mcc_mnc := mcc_mnc,
lac := 13300
lac := 13200
},
rac := 0
},
@ -844,11 +844,19 @@ private function f_gmm_gsup_lu_isd() runs on BSSGP_ConnHdlr {
GSUP.send(ts_GSUP_UL_RES(g_pars.imsi));
}
friend function f_gmm_attach(boolean umts_aka_challenge, boolean force_gsm_sres, integer ran_index := 0) runs on BSSGP_ConnHdlr {
var RoutingAreaIdentificationV old_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);
friend function f_gmm_attach(boolean umts_aka_challenge, boolean force_gsm_sres, integer ran_index := 0,
template (omit) RoutingAreaIdentificationV old_ra := omit) runs on BSSGP_ConnHdlr {
var RoutingAreaIdentificationV old_ra_val;
var template PDU_L3_MS_SGSN attach_req;
var PDU_L3_SGSN_MS l3_mt;
if (istemplatekind(old_ra, "omit")) {
old_ra_val := f_random_RAI();
} else {
old_ra_val := valueof(old_ra);
}
attach_req := ts_GMM_ATTACH_REQ(f_mi_get_lv(), old_ra_val, false, false, omit, omit);
/* indicate R99 capability of the MS to enable UMTS AKA in presence of
* 3G auth vectors */
attach_req.msgs.gprs_mm.attachRequest.msNetworkCapability.msNetworkCapabilityV.revisionLevelIndicatior := '1'B;
@ -1612,12 +1620,12 @@ runs on BSSGP_ConnHdlr {
}
/* Transceive given 'payload' as MO message from Gb -> OsmoSGSN -> GTP */
private function f_gtpu_xceive_mo(inout PdpActPars apars, octetstring payload, integer ran_index := 0)
private function f_gtpu_xceive_mo(inout PdpActPars apars, octetstring payload, integer ran_index := 0, uint9_t n_u := 0)
runs on BSSGP_ConnHdlr {
/* Send PDU via SNDCP/LLC/BSSGP/NS via simulated MS/PCU to the SGSN */
var GtpPeer peer := valueof(ts_GtpPeerU(apars.sgsn_ip_u));
var PDU_SN sndcp := valueof(ts_SN_UD(apars.nsapi, payload));
BSSGP[ran_index].send(ts_LLC_UI(enc_PDU_SN(sndcp), apars.sapi, '0'B, 0));
BSSGP[ran_index].send(ts_LLC_UI(enc_PDU_SN(sndcp), apars.sapi, '0'B, n_u));
/* Expect PDU via GTP from SGSN on simulated GGSN */
alt {
[] GTP.receive(tr_GTPU_GPDU(peer, apars.ggsn_tei_u, payload));
@ -3230,6 +3238,137 @@ testcase TC_bssgp_rim_single_report() runs on test_CT {
f_cleanup();
}
/* Test if the SGSN routes traffic to new cell after the MS attached to it */
private function f_TC_cell_change_different_rai_ci_attach(charstring id) runs on BSSGP_ConnHdlr {
var PdpActPars apars := valueof(t_PdpActPars(mp_ggsn_ip));
/* first perform regular attach */
f_gmm_attach(false, false, ran_index := 0);
/* then activate PDP context */
f_pdp_ctx_act(apars, ran_index := 0);
/* then transceive a downlink PDU */
f_gtpu_xceive_mt(apars, f_rnd_octstring(100), ran_index := 0);
f_gtpu_xceive_mo(apars, f_rnd_octstring(200), ran_index := 0);
/* Now attach on different cell: */
f_bssgp_client_unregister(g_pars.imsi, BSSGP_PROC[0]);
f_bssgp_client_register(g_pars.imsi, g_pars.tlli, BSSGP_PROC[1]);
g_pars.net.expect_auth := false;
f_gmm_attach(false, false, ran_index := 1, old_ra := f_cellid_to_RAI(g_pars.bssgp_cell_id[0]));
f_gtpu_xceive_mt(apars, f_rnd_octstring(100), ran_index := 1);
f_gtpu_xceive_mo(apars, f_rnd_octstring(200), ran_index := 1, n_u := 1);
}
testcase TC_cell_change_different_rai_ci_attach() runs on test_CT {
var BSSGP_ConnHdlr vc_conn;
f_init();
vc_conn := f_start_handler(refers(f_TC_cell_change_different_rai_ci_attach), testcasename(), g_gb, 68);
vc_conn.done;
f_cleanup();
}
/* Test if the SGSN routes traffic to new cell after the MS attached to it */
/* Assumption: g_gb[1] and g_gb[2] configured with same RAC */
private function f_TC_cell_change_different_ci_attach(charstring id) runs on BSSGP_ConnHdlr {
var PdpActPars apars := valueof(t_PdpActPars(mp_ggsn_ip));
f_bssgp_client_unregister(g_pars.imsi, BSSGP_PROC[0]);
f_bssgp_client_register(g_pars.imsi, g_pars.tlli, BSSGP_PROC[1]);
/* first perform regular attach */
f_gmm_attach(false, false, ran_index := 1);
/* then activate PDP context */
f_pdp_ctx_act(apars, ran_index := 1);
/* then transceive a downlink PDU */
f_gtpu_xceive_mt(apars, f_rnd_octstring(100), ran_index := 1);
f_gtpu_xceive_mo(apars, f_rnd_octstring(200), ran_index := 1);
/* Now attach on different cell: */
f_bssgp_client_unregister(g_pars.imsi, BSSGP_PROC[1]);
f_bssgp_client_register(g_pars.imsi, g_pars.tlli, BSSGP_PROC[2]);
g_pars.net.expect_auth := false;
f_gmm_attach(false, false, ran_index := 2, old_ra := f_cellid_to_RAI(g_pars.bssgp_cell_id[1]));
f_gtpu_xceive_mt(apars, f_rnd_octstring(100), ran_index := 2);
f_gtpu_xceive_mo(apars, f_rnd_octstring(200), ran_index := 2, n_u := 1);
}
testcase TC_cell_change_different_ci_attach() runs on test_CT {
var BSSGP_ConnHdlr vc_conn;
f_init();
vc_conn := f_start_handler(refers(f_TC_cell_change_different_ci_attach), testcasename(), g_gb, 69);
vc_conn.done;
f_cleanup();
}
/* Test if the SGSN silently drops MO data message coming from new BVCI if RAC changed (eg. cell change) */
private function f_TC_cell_change_different_rai_ci_data(charstring id) runs on BSSGP_ConnHdlr {
var PdpActPars apars := valueof(t_PdpActPars(mp_ggsn_ip));
/* first perform regular attach */
f_gmm_attach(false, false, ran_index := 0);
/* then activate PDP context */
f_pdp_ctx_act(apars, ran_index := 0);
/* then transceive a downlink PDU */
f_gtpu_xceive_mt(apars, f_rnd_octstring(100), ran_index := 0);
f_gtpu_xceive_mo(apars, f_rnd_octstring(200), ran_index := 0);
/* Send some data over new bvci, it should be silently discarded since
* RAC changed and SGSN expects a RAU to occur in that case */
f_bssgp_client_register(g_pars.imsi, g_pars.tlli, BSSGP_PROC[1]);
var octetstring payload := f_rnd_octstring(200);
var PDU_SN sndcp := valueof(ts_SN_UD(apars.nsapi, payload));
BSSGP[1].send(ts_LLC_UI(enc_PDU_SN(sndcp), apars.sapi, '0'B, 1));
var GtpPeer peer := valueof(ts_GtpPeerU(apars.sgsn_ip_u));
timer T := 2.0;
T.start;
alt {
[] GTP.receive(tr_GTPU_GPDU(peer, apars.ggsn_tei_u, payload)) {
setverdict(fail, "Unexpected GTP message");
}
[] T.timeout { setverdict(pass); }
}
/* Expect SGSN to continue routing DL data to last known NSEI+BVCI */
f_bssgp_client_unregister(g_pars.imsi, BSSGP_PROC[1]);
f_gtpu_xceive_mt(apars, f_rnd_octstring(100), ran_index := 0);
}
testcase TC_cell_change_different_rai_ci_data() runs on test_CT {
var BSSGP_ConnHdlr vc_conn;
f_init();
vc_conn := f_start_handler(refers(f_TC_cell_change_different_rai_ci_data), testcasename(), g_gb, 70);
vc_conn.done;
f_cleanup();
}
/* Test if the SGSN routes traffic to new cell after the MS switched cell without re-attaching */
/* Assumption: g_gb[1] and g_gb[2] configured with same RAC */
private function f_TC_cell_change_different_ci_data(charstring id) runs on BSSGP_ConnHdlr {
var PdpActPars apars := valueof(t_PdpActPars(mp_ggsn_ip));
f_bssgp_client_unregister(g_pars.imsi, BSSGP_PROC[0]);
f_bssgp_client_register(g_pars.imsi, g_pars.tlli, BSSGP_PROC[1]);
/* first perform regular attach */
f_gmm_attach(false, false, ran_index := 1);
/* then activate PDP context */
f_pdp_ctx_act(apars, ran_index := 1);
/* then transceive a downlink PDU */
f_gtpu_xceive_mt(apars, f_rnd_octstring(100), ran_index := 1);
f_gtpu_xceive_mo(apars, f_rnd_octstring(200), ran_index := 1);
/* Now attach on different cell: */
f_bssgp_client_unregister(g_pars.imsi, BSSGP_PROC[1]);
f_bssgp_client_register(g_pars.imsi, g_pars.tlli, BSSGP_PROC[2]);
f_gtpu_xceive_mo(apars, f_rnd_octstring(200), ran_index := 2, n_u := 1);
f_gtpu_xceive_mt(apars, f_rnd_octstring(100), ran_index := 2);
}
testcase TC_cell_change_different_ci_data() runs on test_CT {
var BSSGP_ConnHdlr vc_conn;
f_init();
vc_conn := f_start_handler(refers(f_TC_cell_change_different_ci_data), testcasename(), g_gb, 71);
vc_conn.done;
f_cleanup();
}
control {
execute( TC_attach() );
execute( TC_attach_mnc3() );
@ -3294,6 +3433,11 @@ control {
execute( TC_bssgp_rim_single_report() );
execute( TC_cell_change_different_rai_ci_attach() );
execute( TC_cell_change_different_rai_ci_data() );
execute( TC_cell_change_different_ci_attach() );
execute( TC_cell_change_different_ci_data() );
/* At the end, may crash osmo-sgsn, see OS#3957, OS#4245 */
execute( TC_attach_req_id_req_ra_update() );
}