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BSC_Tests: add TC_rll_{rel_ind,err_ind,timeout}_sapi_n_reject 

The idea of these new test cases is to verify that the IUT does
send BSSMAP SAPI N Reject in the following cases respectively:

  - on receipt of an unexpected RLL RELease INDication message
    in response to RLL ESTablish REQuest (for SAPI=3 link);

  - on receipt of an unexpected RLL ERROR INDication message
    in response to RLL ESTablish REQuest (for SAPI=3 link);

  - due to SAPI=3 link establishment timeout.

Change-Id: I00489e2af3befe5780380f64b09fb01e726c8df5
Related: SYS#5047, OS#4728
This commit is contained in:
Vadim Yanitskiy 2020-08-28 18:04:41 +07:00
parent 4806396589
commit 6ef5dfab86
1 changed files with 116 additions and 0 deletions
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116
bsc/BSC_Tests.ttcn
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@ -1881,6 +1881,117 @@ testcase TC_rll_est_ind_inval_sacch() runs on test_CT {
setverdict(pass);
}
private function f_exp_sapi_n_reject(template (present) GsmSapi sapi := ?,
template myBSSMAP_Cause cause := ?,
float T_val := 2.0)
runs on test_CT {
var BSSAP_N_DATA_ind rx_di;
timer T;
var template BSSMAP_IE_Cause tr_cause := tr_BSSMAP_IE_Cause(cause);
var template PDU_BSSAP tr_pdu := tr_BSSMAP_SAPInReject(sapi);
T.start(T_val);
alt {
[] BSSAP.receive(tr_BSSAP_DATA_ind(?, tr_pdu)) -> value rx_di {
var BSSMAP_IE_Cause rx_cause := rx_di.userData.pdu.bssmap.sAPInReject.cause;
if (not match(rx_cause, tr_cause)) {
setverdict(fail, "Rx unexpected Cause IE: ",
rx_cause, " vs expected ", tr_cause);
}
setverdict(pass);
}
[] BSSAP.receive(BSSAP_N_DATA_ind:?) -> value rx_di {
setverdict(fail, "Rx unexpected BSSAP PDU: ", rx_di);
}
[] T.timeout {
setverdict(fail, "Timeout waiting for BSSMAP SAPI N Reject");
}
}
}
/* Check if we get SAPI N Reject on receipt of unexpected RLL RELease INDication */
testcase TC_rll_rel_ind_sapi_n_reject() runs on test_CT {
var octetstring rnd_data := f_rnd_octstring(16);
var RSL_Message rx_rsl;
var DchanTuple dt;
f_init(1);
/* MS establishes a SAPI=0 link on DCCH */
dt := f_est_dchan(f_rnd_ra_cs(), 23, rnd_data);
/* MSC sends some data on (not yet established) SAPI=3 link */
BSSAP.send(ts_BSSAP_DATA_req(dt.sccp_conn_id, ts_BSSAP_DTAP(rnd_data, '03'O)));
/* BSC attempts to establish a SAPI=3 link on DCCH */
rx_rsl := f_exp_ipa_rx(0, tr_RSL_EST_REQ(dt.rsl_chan_nr, tr_RslLinkID_DCCH(3)));
/* MS sends unexpected RELease INDication on SAPI=3 */
f_ipa_tx(0, ts_RSL_REL_IND(dt.rsl_chan_nr, ts_RslLinkID_DCCH(3)));
/* We expect to receive BSSMAP SAPI N Reject message from the BSC */
f_exp_sapi_n_reject(3, GSM0808_CAUSE_MS_NOT_EQUIPPED);
/* Clean up the connection */
BSSAP.send(ts_BSSAP_DISC_req(dt.sccp_conn_id, 0));
f_expect_chan_rel(0, dt.rsl_chan_nr, expect_rll_rel_req := false);
setverdict(pass);
}
/* Check if we get SAPI N Reject on receipt of unexpected RLL ERROR INDication */
testcase TC_rll_err_ind_sapi_n_reject() runs on test_CT {
var octetstring rnd_data := f_rnd_octstring(16);
var RSL_Message rx_rsl;
var DchanTuple dt;
f_init(1);
/* MS establishes a SAPI=0 link on DCCH */
dt := f_est_dchan(f_rnd_ra_cs(), 23, rnd_data);
/* MSC sends some data on (not yet established) SAPI=3 link */
BSSAP.send(ts_BSSAP_DATA_req(dt.sccp_conn_id, ts_BSSAP_DTAP(rnd_data, '03'O)));
/* BSC attempts to establish a SAPI=3 link on DCCH */
rx_rsl := f_exp_ipa_rx(0, tr_RSL_EST_REQ(dt.rsl_chan_nr, tr_RslLinkID_DCCH(3)));
/* BTS sends unexpected ERROR INDication on SAPI=3 */
f_ipa_tx(0, ts_RSL_ERROR_IND(dt.rsl_chan_nr, ts_RslLinkID_DCCH(3), ''O));
/* We expect to receive BSSMAP SAPI N Reject message from the BSC */
f_exp_sapi_n_reject(3, GSM0808_CAUSE_BSS_NOT_EQUIPPED);
/* Clean up the connection */
BSSAP.send(ts_BSSAP_DISC_req(dt.sccp_conn_id, 0));
f_expect_chan_rel(0, dt.rsl_chan_nr, expect_rll_rel_req := false);
setverdict(pass);
}
/* Check if we get SAPI N Reject due to a SAPI=3 link establishment timeout */
testcase TC_rll_timeout_sapi_n_reject() runs on test_CT {
var octetstring rnd_data := f_rnd_octstring(16);
var RSL_Message rx_rsl;
var DchanTuple dt;
f_init(1);
/* MS establishes a SAPI=0 link on DCCH */
dt := f_est_dchan(f_rnd_ra_cs(), 23, rnd_data);
/* MSC sends some data on (not yet established) SAPI=3 link */
BSSAP.send(ts_BSSAP_DATA_req(dt.sccp_conn_id, ts_BSSAP_DTAP(rnd_data, '03'O)));
/* BSC attempts to establish a SAPI=3 link on DCCH */
rx_rsl := f_exp_ipa_rx(0, tr_RSL_EST_REQ(dt.rsl_chan_nr, tr_RslLinkID_DCCH(3)));
/* MS does not respond, so the link establishment timeout triggers SAPI N Reject */
f_exp_sapi_n_reject(3, GSM0808_CAUSE_BSS_NOT_EQUIPPED, T_val := 8.0);
/* Clean up the connection */
BSSAP.send(ts_BSSAP_DISC_req(dt.sccp_conn_id, 0));
f_expect_chan_rel(0, dt.rsl_chan_nr, expect_rll_rel_req := false);
setverdict(pass);
}
testcase TC_si_default() runs on test_CT {
f_init(0);
f_init_bts_and_check_sysinfo(0, expect_si := SystemInformationConfig_default);
@ -6446,6 +6557,11 @@ control {
execute( TC_rll_est_ind_inval_sapi3() );
execute( TC_rll_est_ind_inval_sacch() );
/* SAPI N Reject triggered by RLL establishment failures */
execute( TC_rll_rel_ind_sapi_n_reject() );
execute( TC_rll_err_ind_sapi_n_reject() );
execute( TC_rll_timeout_sapi_n_reject() );
/* Paging related tests */
execute( TC_paging_imsi_nochan() );
execute( TC_paging_tmsi_nochan() );