From 6ef5dfab86227330babbc7a0f4712668807e2b48 Mon Sep 17 00:00:00 2001 From: Vadim Yanitskiy Date: Fri, 28 Aug 2020 18:04:41 +0700 Subject: [PATCH] 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 --- bsc/BSC_Tests.ttcn | 116 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 116 insertions(+) diff --git a/bsc/BSC_Tests.ttcn b/bsc/BSC_Tests.ttcn index 61b700c36..dce9ae9c7 100644 --- a/bsc/BSC_Tests.ttcn +++ b/bsc/BSC_Tests.ttcn @@ -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() );