module MSC_Tests_Iu { /* Osmocom MSC test suite for Iu interface in TTCN-3 * (C) 2019 Harald Welte * All rights reserved. * * Released under the terms of GNU General Public License, Version 2 or * (at your option) any later version. * * SPDX-License-Identifier: GPL-2.0-or-later */ import from General_Types all; import from Osmocom_Types all; import from BSC_ConnectionHandler all; import from MSC_Tests all; import from Osmocom_VTY_Functions all; import from GSUP_Emulation all; import from RAN_Emulation all; import from RANAP_Templates all; import from MobileL3_Types all; import from MobileL3_CommonIE_Types all; import from MobileL3_SMS_Types all; import from L3_Templates all; import from L3_Common all; testcase TC_iu_lu_imsi_reject() runs on MTC_CT { var BSC_ConnHdlr vc_conn; f_init(3); vc_conn := f_start_handler(refers(f_tc_lu_imsi_reject), 1003, ran_idx := 2, ran_is_geran := false); vc_conn.done; } testcase TC_iu_lu_imsi_timeout_gsup() runs on MTC_CT { var BSC_ConnHdlr vc_conn; f_init(3); vc_conn := f_start_handler(refers(f_tc_lu_imsi_timeout_gsup), 1004, ran_idx := 2, ran_is_geran := false); vc_conn.done; } testcase TC_iu_lu_imsi_auth3g_tmsi() runs on MTC_CT { var BSC_ConnHdlr vc_conn; f_init(3); f_vty_config(MSCVTY, "network", "authentication required"); vc_conn := f_start_handler(refers(f_tc_lu_imsi_auth3g_tmsi), 1005, ran_idx := 2, ran_is_geran := false); vc_conn.done; } testcase TC_iu_lu_imsi_timeout_tmsi_realloc() runs on MTC_CT { var BSC_ConnHdlr vc_conn; f_init(3); f_vty_config(MSCVTY, "network", "authentication required"); vc_conn := f_start_handler(refers(f_tc_lu_imsi_timeout_tmsi_realloc), 1005, ran_idx := 2, ran_is_geran := false); vc_conn.done; } testcase TC_iu_cmserv_imsi_unknown() runs on MTC_CT { var BSC_ConnHdlr vc_conn; f_init(3); vc_conn := f_start_handler(refers(f_tc_cmserv_imsi_unknown), 1006, ran_idx := 2, ran_is_geran := false); vc_conn.done; } testcase TC_iu_lu_and_mo_call() runs on MTC_CT { var BSC_ConnHdlr vc_conn; f_init(3); vc_conn := f_start_handler(refers(f_tc_lu_and_mo_call), 1007, ran_idx := 2, ran_is_geran := false); vc_conn.done; } testcase TC_iu_lu_and_mo_call_sccp_tiar_timeout() runs on MTC_CT { var BSC_ConnHdlr vc_conn; /* Set T(iar) in MSC low enough that it will trigger before other side has time to keep alive with a T(ias). Keep recommended ratio of T(iar) >= T(ias)*2 */ g_msc_sccp_timer_ias := 2; g_msc_sccp_timer_iar := 5; f_init(3); vc_conn := f_start_handler(refers(f_lu_and_mo_call_sccp_tiar_timeout), 1019, ran_idx := 2, ran_is_geran := false); vc_conn.done; } testcase TC_iu_lu_auth_sai_timeout() runs on MTC_CT { var BSC_ConnHdlr vc_conn; f_init(3); f_vty_config(MSCVTY, "network", "authentication required"); vc_conn := f_start_handler(refers(f_tc_lu_auth_sai_timeout), 1008, ran_idx := 2, ran_is_geran := false); vc_conn.done; } testcase TC_iu_lu_auth_sai_err() runs on MTC_CT { var BSC_ConnHdlr vc_conn; f_init(3); f_vty_config(MSCVTY, "network", "authentication required"); vc_conn := f_start_handler(refers(f_tc_lu_auth_sai_err), 1009, ran_idx := 2, ran_is_geran := false); vc_conn.done; } /* Test LU but RNC will send a Iu Release request in the middle */ private function f_tc_iu_lu_release_request(charstring id, BSC_ConnHdlrPars pars) runs on BSC_ConnHdlr { f_init_handler(pars); var PDU_ML3_MS_NW l3_lu := f_build_lu_imsi(g_pars.imsi) var PDU_DTAP_MT dtap_mt; /* tell GSUP dispatcher to send this IMSI to us */ f_create_gsup_expect(hex2str(g_pars.imsi)); /* Send BSSAP_Conn_Req with COMPL L3 INFO to MSC */ f_cl3_or_initial_ue(l3_lu); f_sleep(1.0); /* send release request in the middle of the LU */ BSSAP.send(ts_RANAP_IuReleaseRequest(ts_RanapCause_om_intervention)); alt { [] BSSAP.receive(tr_PDU_DTAP_MT(tr_ML3_MT_LU_Rej)) { repeat; } [] BSSAP.receive(tr_RANAP_IuReleaseCommand(?)) {} } BSSAP.send(ts_RANAP_IuReleaseComplete); alt { /* See https://osmocom.org/issues/2862 */ [] BSSAP.receive(tr_RANAP_IuReleaseCommand(?)) { setverdict(fail, "Got a second Iu Release Command, only one expected"); mtc.stop; repeat; } [] BSSAP.receive(tr_MSC_CONN_PRIM_DISC_IND) {} } setverdict(pass); } testcase TC_iu_lu_release_request() runs on MTC_CT { var BSC_ConnHdlr vc_conn; f_init(3); vc_conn := f_start_handler(refers(f_tc_iu_lu_release_request), 1010, ran_idx := 2, ran_is_geran := false); vc_conn.done; } testcase TC_iu_lu_disconnect() runs on MTC_CT { var BSC_ConnHdlr vc_conn; f_init(3); vc_conn := f_start_handler(refers(f_tc_lu_disconnect), 1011, ran_idx := 2, ran_is_geran := false); vc_conn.done; } testcase TC_iu_lu_by_imei() runs on MTC_CT { var BSC_ConnHdlr vc_conn; f_init(3); vc_conn := f_start_handler(refers(f_tc_lu_by_imei), 1012, ran_idx := 2, ran_is_geran := false); vc_conn.done; } testcase TC_iu_imsi_detach_by_imsi() runs on MTC_CT { var BSC_ConnHdlr vc_conn; f_init(3); vc_conn := f_start_handler(refers(f_tc_imsi_detach_by_imsi), 1014, ran_idx := 2, ran_is_geran := false); vc_conn.done; } testcase TC_iu_imsi_detach_by_tmsi() runs on MTC_CT { var BSC_ConnHdlr vc_conn; f_init(3); vc_conn := f_start_handler(refers(f_tc_imsi_detach_by_tmsi), 1015, ran_idx := 2, ran_is_geran := false); vc_conn.done; } testcase TC_iu_imsi_detach_by_imei() runs on MTC_CT { var BSC_ConnHdlr vc_conn; f_init(3); vc_conn := f_start_handler(refers(f_tc_imsi_detach_by_imei), 1016, ran_idx := 2, ran_is_geran := false); vc_conn.done; } testcase TC_iu_emerg_call_imei_reject() runs on MTC_CT { var BSC_ConnHdlr vc_conn; f_init(3); vc_conn := f_start_handler(refers(f_tc_emerg_call_imei_reject), 1017, ran_idx := 2, ran_is_geran := false); vc_conn.done; } testcase TC_iu_emerg_call_imsi() runs on MTC_CT { var BSC_ConnHdlr vc_conn; f_init(3); vc_conn := f_start_handler(refers(f_tc_emerg_call_imsi), 1018, ran_idx := 2, ran_is_geran := false); vc_conn.done; } testcase TC_iu_establish_and_nothing() runs on MTC_CT { var BSC_ConnHdlr vc_conn; f_init(3); vc_conn := f_start_handler(refers(f_tc_establish_and_nothing), 1027, ran_idx := 2, ran_is_geran := false); vc_conn.done; } testcase TC_iu_mo_setup_and_nothing() runs on MTC_CT { var BSC_ConnHdlr vc_conn; f_init(3); vc_conn := f_start_handler(refers(f_tc_mo_setup_and_nothing), 1028, ran_idx := 2, ran_is_geran := false); vc_conn.done; } testcase TC_iu_mo_crcx_ran_timeout() runs on MTC_CT { var BSC_ConnHdlr vc_conn; f_init(3); vc_conn := f_start_handler(refers(f_tc_mo_crcx_ran_timeout), 1029, ran_idx := 2, ran_is_geran := false); vc_conn.done; } testcase TC_iu_mo_crcx_ran_reject() runs on MTC_CT { var BSC_ConnHdlr vc_conn; f_init(3); vc_conn := f_start_handler(refers(f_tc_mo_crcx_ran_reject), 1030, ran_idx := 2, ran_is_geran := false); vc_conn.done; } testcase TC_iu_mt_crcx_ran_reject() runs on MTC_CT { var BSC_ConnHdlr vc_conn; f_init(3); vc_conn := f_start_handler(refers(f_tc_mt_crcx_ran_reject), 1031, ran_idx := 2, ran_is_geran := false); vc_conn.done; } testcase TC_iu_mt_t310() runs on MTC_CT { var BSC_ConnHdlr vc_conn; f_init(3); vc_conn := f_start_handler(refers(f_tc_mt_t310), 1032, ran_idx := 2, ran_is_geran := false); vc_conn.done; } testcase TC_iu_gsup_cancel() runs on MTC_CT { var BSC_ConnHdlr vc_conn; f_init(3); vc_conn := f_start_handler(refers(f_tc_gsup_cancel), 1033, ran_idx := 2, ran_is_geran := false); vc_conn.done; } testcase TC_iu_mo_release_timeout() runs on MTC_CT { var BSC_ConnHdlr vc_conn; f_init(3); vc_conn := f_start_handler(refers(f_tc_mo_release_timeout), 1040, ran_idx := 2, ran_is_geran := false); vc_conn.done; } testcase TC_iu_lu_and_mt_call() runs on MTC_CT { var BSC_ConnHdlr vc_conn; f_init(3); vc_conn := f_start_handler(refers(f_tc_lu_and_mt_call), 1142, ran_idx := 2, ran_is_geran := false); vc_conn.done; } testcase TC_iu_lu_and_mt_call_already_paging() runs on MTC_CT { var BSC_ConnHdlr vc_conn; f_init(3); vc_conn := f_start_handler(refers(f_tc_lu_and_mt_call_already_paging), 1142, ran_idx := 2, ran_is_geran := false); vc_conn.done; } testcase TC_iu_lu_and_mo_sms() runs on MTC_CT { var BSC_ConnHdlr vc_conn; f_init(3); vc_conn := f_start_handler(refers(f_tc_lu_and_mo_sms), 1042, ran_idx := 2, ran_is_geran := false); vc_conn.done; } testcase TC_iu_lu_and_mt_sms() runs on MTC_CT { var BSC_ConnHdlrPars pars; var BSC_ConnHdlr vc_conn; f_init(3); pars := f_init_pars(1043, ran_idx := 2, ran_is_geran := false); vc_conn := f_start_handler_with_pars(refers(f_tc_lu_and_mt_sms), pars); vc_conn.done; } testcase TC_iu_lu_and_mt_sms_already_paging() runs on MTC_CT { var BSC_ConnHdlrPars pars; var BSC_ConnHdlr vc_conn; f_init(3); pars := f_init_pars(101045, ran_idx := 2, ran_is_geran := false); vc_conn := f_start_handler_with_pars(refers(f_tc_lu_and_mt_sms_already_paging), pars); vc_conn.done; } testcase TC_iu_lu_and_mt_sms_paging_and_nothing() runs on MTC_CT { var BSC_ConnHdlrPars pars; var BSC_ConnHdlr vc_conn; f_init(3); pars := f_init_pars(101843, ran_idx := 2, ran_is_geran := false); vc_conn := f_start_handler_with_pars(refers(f_tc_lu_and_mt_sms_paging_and_nothing), pars); vc_conn.done; } testcase TC_iu_lu_and_mt_sms_paging_repeated() runs on MTC_CT { var BSC_ConnHdlrPars pars; var BSC_ConnHdlr vc_conn; f_init(3); pars := f_init_pars(101844, ran_idx := 2, ran_is_geran := false); vc_conn := f_start_handler_with_pars(refers(f_tc_lu_and_mt_sms_paging_repeated), pars); vc_conn.done; } testcase TC_iu_smpp_mo_sms() runs on MTC_CT { var BSC_ConnHdlr vc_conn; f_init(3); f_vty_config2(MSCVTY, { "smpp", "esme msc_tester"}, "default-route"); vc_conn := f_start_handler(refers(f_tc_smpp_mo_sms), 1044, ran_idx := 2, ran_is_geran := false); vc_conn.done; f_vty_config2(MSCVTY, { "smpp", "esme msc_tester"}, "no default-route"); } testcase TC_iu_gsup_mo_sms() runs on MTC_CT { var BSC_ConnHdlr vc_conn; f_init(3); f_vty_config(MSCVTY, "msc", "sms-over-gsup"); vc_conn := f_start_handler(refers(f_tc_gsup_mo_sms), 1088, ran_idx := 2, ran_is_geran := false); vc_conn.done; f_vty_config(MSCVTY, "msc", "no sms-over-gsup"); } testcase TC_iu_gsup_mo_smma() runs on MTC_CT { var BSC_ConnHdlr vc_conn; f_init(3); f_vty_config(MSCVTY, "msc", "sms-over-gsup"); vc_conn := f_start_handler(refers(f_tc_gsup_mo_smma), 1089, ran_idx := 2, ran_is_geran := false); vc_conn.done; f_vty_config(MSCVTY, "msc", "no sms-over-gsup"); } testcase TC_iu_gsup_mt_sms_ack() runs on MTC_CT { var BSC_ConnHdlrPars pars; var BSC_ConnHdlr vc_conn; f_init(3); pars := f_init_pars(1090, ran_idx := 2, ran_is_geran := false); f_vty_config(MSCVTY, "msc", "sms-over-gsup"); vc_conn := f_start_handler_with_pars(refers(f_tc_gsup_mt_sms_ack), pars); vc_conn.done; f_vty_config(MSCVTY, "msc", "no sms-over-gsup"); } testcase TC_iu_gsup_mt_sms_err() runs on MTC_CT { var BSC_ConnHdlrPars pars; var BSC_ConnHdlr vc_conn; f_init(3); pars := f_init_pars(1091, ran_idx := 2, ran_is_geran := false); f_vty_config(MSCVTY, "msc", "sms-over-gsup"); vc_conn := f_start_handler_with_pars(refers(f_tc_gsup_mt_sms_err), pars); vc_conn.done; f_vty_config(MSCVTY, "msc", "no sms-over-gsup"); } testcase TC_iu_gsup_mt_sms_rp_mr() runs on MTC_CT { var BSC_ConnHdlrPars pars; var BSC_ConnHdlr vc_conn; f_init(3); pars := f_init_pars(1092, ran_idx := 2, ran_is_geran := false); f_vty_config(MSCVTY, "msc", "sms-over-gsup"); vc_conn := f_start_handler_with_pars(refers(f_tc_gsup_mt_sms_rp_mr), pars); vc_conn.done; f_vty_config(MSCVTY, "msc", "no sms-over-gsup"); } testcase TC_iu_gsup_mo_mt_sms_rp_mr() runs on MTC_CT { var BSC_ConnHdlrPars pars; var BSC_ConnHdlr vc_conn; f_init(3); pars := f_init_pars(1093, ran_idx := 2, ran_is_geran := false); f_vty_config(MSCVTY, "msc", "sms-over-gsup"); vc_conn := f_start_handler_with_pars(refers(f_tc_gsup_mo_mt_sms_rp_mr), pars); vc_conn.done; f_vty_config(MSCVTY, "msc", "no sms-over-gsup"); } testcase TC_iu_lu_and_mo_ussd_single_request() runs on MTC_CT { var BSC_ConnHdlr vc_conn; f_init(3); vc_conn := f_start_handler(refers(f_tc_lu_and_mo_ussd_single_request), 1046, ran_idx := 2, ran_is_geran := false); vc_conn.done; } testcase TC_iu_lu_and_mt_ussd_notification() runs on MTC_CT { var BSC_ConnHdlr vc_conn; f_init(3); vc_conn := f_start_handler(refers(f_tc_lu_and_mt_ussd_notification), 1047, ran_idx := 2, ran_is_geran := false); vc_conn.done; } testcase TC_iu_lu_and_mo_ussd_during_mt_call() runs on MTC_CT { var BSC_ConnHdlr vc_conn; f_init(3); vc_conn := f_start_handler(refers(f_tc_lu_and_mo_ussd_during_mt_call), 1048, ran_idx := 2, ran_is_geran := false); vc_conn.done; } testcase TC_mo_cc_iu_release() runs on MTC_CT { var BSC_ConnHdlr vc_conn; f_init(3); vc_conn := f_start_handler(refers(f_tc_mo_cc_bssmap_clear), 1043, ran_idx := 2, ran_is_geran := false); vc_conn.done; } testcase TC_iu_lu_and_mt_ussd_during_mt_call() runs on MTC_CT { var BSC_ConnHdlr vc_conn; f_init(3); vc_conn := f_start_handler(refers(f_tc_lu_and_mt_ussd_during_mt_call), 1049, ran_idx := 2, ran_is_geran := false); vc_conn.done; } testcase TC_iu_lu_and_mo_ussd_mo_release() runs on MTC_CT { var BSC_ConnHdlr vc_conn; f_init(3); vc_conn := f_start_handler(refers(f_tc_lu_and_mo_ussd_mo_release), 1050, ran_idx := 2, ran_is_geran := false); vc_conn.done; } testcase TC_iu_lu_and_ss_session_timeout() runs on MTC_CT { var BSC_ConnHdlr vc_conn; f_init(3); f_vty_config(MSCVTY, "msc", "ncss guard-timeout 3"); vc_conn := f_start_handler(refers(f_tc_lu_and_ss_session_timeout), 1051, ran_idx := 2, ran_is_geran := false); vc_conn.done; f_vty_config(MSCVTY, "msc", "ncss guard-timeout 0"); } testcase TC_iu_mt_ussd_for_unknown_subscr() runs on MTC_CT { var BSC_ConnHdlr vc_conn; f_init(3); vc_conn := f_start_handler(refers(f_tc_mt_ussd_for_unknown_subscr), 1052, ran_idx := 2, ran_is_geran := false); vc_conn.done; } testcase TC_iu_mo_ussd_for_unknown_trans() runs on MTC_CT { var BSC_ConnHdlr vc_conn; f_init(3); vc_conn := f_start_handler(refers(f_tc_mo_ussd_for_unknown_trans), 1053, ran_idx := 2, ran_is_geran := false); vc_conn.done; } testcase TC_iu_proc_ss_for_unknown_session() runs on MTC_CT { var BSC_ConnHdlr vc_conn; f_init(3); vc_conn := f_start_handler(refers(f_tc_proc_ss_for_unknown_session), 1055, ran_idx := 2, ran_is_geran := false); vc_conn.done; } testcase TC_iu_proc_ss_paging_fail() runs on MTC_CT { var BSC_ConnHdlr vc_conn; f_init(3); vc_conn := f_start_handler(refers(f_tc_proc_ss_paging_fail), 1056, ran_idx := 2, ran_is_geran := false); vc_conn.done; } testcase TC_iu_proc_ss_abort() runs on MTC_CT { var BSC_ConnHdlr vc_conn; f_init(3); vc_conn := f_start_handler(refers(f_tc_proc_ss_abort), 1057, ran_idx := 2, ran_is_geran := false); vc_conn.done; } /* Verify multiple concurrent MO SS/USSD transactions * (one subscriber - one transaction) */ testcase TC_iu_multi_lu_and_mo_ussd() runs on MTC_CT { var BSC_ConnHdlr vc_conn[16]; var BSC_ConnHdlrPars pars; var integer i; f_init(3); for (i := 0; i < sizeof(vc_conn); i := i + 1) { pars := f_init_pars(1100 + i, ran_idx := 2, ran_is_geran := false); vc_conn[i] := f_start_handler_with_pars(refers(f_tc_lu_and_mo_ussd_single_request), pars); } for (i := 0; i < sizeof(vc_conn); i := i + 1) { vc_conn[i].done; } } /* Verify multiple concurrent MT SS/USSD transactions * (one subscriber - one transaction) */ testcase TC_iu_multi_lu_and_mt_ussd() runs on MTC_CT { var BSC_ConnHdlr vc_conn[16]; var BSC_ConnHdlrPars pars; var integer i; f_init(3); for (i := 0; i < sizeof(vc_conn); i := i + 1) { pars := f_init_pars(1116 + i, ran_idx := 2, ran_is_geran := false, gsup_sid := '200001'O & int2oct(i, 1)); vc_conn[i] := f_start_handler_with_pars(refers(f_tc_lu_and_mt_ussd_notification), pars); } for (i := 0; i < sizeof(vc_conn); i := i + 1) { vc_conn[i].done; } } testcase TC_iu_lu_with_invalid_mcc_mnc() runs on MTC_CT { var BSC_ConnHdlr vc_conn; f_init(3); vc_conn := f_start_handler(refers(f_tc_lu_with_invalid_mcc_mnc), 1054, ran_idx := 2, ran_is_geran := false); vc_conn.done; } testcase TC_iu_lu_and_expire_while_paging() runs on MTC_CT { var BSC_ConnHdlr vc_conn; f_init(3); vc_conn := f_start_handler(refers(f_tc_lu_and_expire_while_paging), 1055, ran_idx := 2, ran_is_geran := false); vc_conn.done; } control { execute( TC_iu_lu_imsi_reject() ); execute( TC_iu_lu_imsi_timeout_gsup() ); execute( TC_iu_lu_imsi_auth3g_tmsi() ); execute( TC_iu_lu_imsi_timeout_tmsi_realloc() ); execute( TC_iu_cmserv_imsi_unknown() ); execute( TC_iu_lu_and_mo_call() ); execute( TC_iu_lu_and_mo_call_sccp_tiar_timeout() ); execute( TC_iu_lu_auth_sai_timeout() ); execute( TC_iu_lu_auth_sai_err() ); execute( TC_iu_lu_release_request() ); execute( TC_iu_lu_disconnect() ); execute( TC_iu_lu_by_imei() ); execute( TC_iu_imsi_detach_by_imsi() ); execute( TC_iu_imsi_detach_by_tmsi() ); execute( TC_iu_imsi_detach_by_imei() ); execute( TC_iu_emerg_call_imei_reject() ); execute( TC_iu_emerg_call_imsi() ); execute( TC_iu_establish_and_nothing() ); execute( TC_iu_mo_setup_and_nothing() ); execute( TC_iu_mo_crcx_ran_timeout() ); execute( TC_iu_mo_crcx_ran_reject() ); execute( TC_iu_mt_crcx_ran_reject() ); execute( TC_iu_gsup_cancel() ); execute( TC_iu_mo_release_timeout() ); execute( TC_reset_two_1iu() ); execute( TC_iu_lu_and_mt_call() ); execute( TC_iu_lu_and_mt_call_already_paging() ); execute( TC_iu_lu_and_mo_sms() ); execute( TC_iu_lu_and_mt_sms() ); execute( TC_iu_lu_and_mt_sms_already_paging() ); execute( TC_iu_lu_and_mt_sms_paging_and_nothing() ); execute( TC_iu_lu_and_mt_sms_paging_repeated() ); execute( TC_iu_smpp_mo_sms() ); execute( TC_iu_gsup_mo_sms() ); execute( TC_iu_gsup_mo_smma() ); execute( TC_iu_gsup_mt_sms_ack() ); execute( TC_iu_gsup_mt_sms_err() ); execute( TC_iu_gsup_mt_sms_rp_mr() ); execute( TC_iu_gsup_mo_mt_sms_rp_mr() ); execute( TC_iu_lu_and_mo_ussd_single_request() ); execute( TC_iu_lu_and_mt_ussd_notification() ); execute( TC_iu_lu_and_mo_ussd_during_mt_call() ); execute( TC_iu_lu_and_mt_ussd_during_mt_call() ); execute( TC_iu_lu_and_mo_ussd_mo_release() ); execute( TC_iu_lu_and_ss_session_timeout() ); execute( TC_iu_mt_ussd_for_unknown_subscr() ); execute( TC_iu_mo_ussd_for_unknown_trans() ); execute( TC_iu_proc_ss_for_unknown_session() ); execute( TC_iu_proc_ss_paging_fail() ); execute( TC_iu_proc_ss_abort() ); execute( TC_iu_multi_lu_and_mo_ussd() ); execute( TC_iu_multi_lu_and_mt_ussd() ); execute( TC_iu_lu_with_invalid_mcc_mnc() ); execute( TC_iu_lu_and_expire_while_paging() ); /* TODO: Iu + SGsAP related tests, e.g. paging on IuCS */ /* Run this last: at the time of writing this test crashes the MSC */ execute( TC_mo_cc_iu_release() ); } }