[PATCH] osmo-ttcn3-hacks[master]: MSC_Tests: Test SCCP clearing on release timeout

[dexter]

Review at  https://gerrit.osmocom.org/7319

MSC_Tests: Test SCCP clearing on release timeout

Provoke a timeout error in the MGCP FSM which then triggers a
release on the CC layer. Ignore this release and let the CC leyer
timeout. The MSC is expected to clear the SCCP connection.

Change-Id: If3e0bee11763f1c6b2cfae91f2a818ff7d0df9e7
Related: OS#2881
Related: OS#2882
---
M msc/MSC_Tests.ttcn
1 file changed, 39 insertions(+), 0 deletions(-)


  git pull ssh://gerrit.osmocom.org:29418/osmo-ttcn3-hacks 
refs/changes/19/7319/1

diff --git a/msc/MSC_Tests.ttcn b/msc/MSC_Tests.ttcn
index 485fd37..e154911 100644
--- a/msc/MSC_Tests.ttcn
+++ b/msc/MSC_Tests.ttcn
@@ -1703,6 +1703,44 @@
        }       
 }
 
+/* Test MO Call with no response to RAN-side CRCX or DTAP Release */
+private function f_tc_mo_release_timeout(charstring id, BSC_ConnHdlrPars pars) 
runs on BSC_ConnHdlr {
+       f_init_handler(pars);
+       var CallParameters cpars := valueof(t_CallParams('12345'H, 0));
+       var MNCC_PDU mncc;
+       var MgcpCommand mgcp_cmd;
+
+       f_perform_lu();
+
+       f_establish_fully(valueof(ts_MI_IMSI_LV(g_pars.imsi)));
+       f_create_mncc_expect(hex2str(cpars.called_party));
+       f_create_mgcp_expect(ExpectCriteria:{omit,omit,omit});
+
+       BSSAP.send(ts_PDU_DTAP_MO(ts_ML3_MO_CC_SETUP(cpars.transaction_id, 
cpars.called_party)));
+       MNCC.receive(tr_MNCC_SETUP_ind(?, 
tr_MNCC_number(hex2str(cpars.called_party)))) -> value mncc;
+       cpars.mncc_callref := mncc.u.signal.callref;
+       MNCC.send(ts_MNCC_CALL_PROC_req(cpars.mncc_callref, 
cpars.mncc_bearer_cap));
+       
BSSAP.receive(tr_PDU_DTAP_MT(tr_ML3_MT_CC_CALL_PROC(cpars.transaction_id)));
+
+       /* Drop CRCX */
+       MGCP.receive(tr_CRCX) -> value mgcp_cmd;
+
+       /* Drop DTAP Release */
+       
BSSAP.receive(tr_PDU_DTAP_MT(tr_ML3_MT_CC_RELEASE(cpars.transaction_id)));
+
+       /* Drop resent DTAP Release */
+       
BSSAP.receive(tr_PDU_DTAP_MT(tr_ML3_MT_CC_RELEASE(cpars.transaction_id)));
+
+       f_expect_clear(60.0);
+}
+testcase TC_mo_release_timeout() runs on MTC_CT {
+       var BSC_ConnHdlr vc_conn;
+       f_init();
+
+       vc_conn := f_start_handler(refers(f_tc_mo_release_timeout), 40);
+       vc_conn.done;
+}
+
 
 
 /* TODO:
@@ -1760,6 +1798,7 @@
        execute( TC_lu_imsi_auth_tmsi_encr_3_1_no_cm() );
        execute( TC_lu_imsi_auth_tmsi_encr_13_2() );
        execute( TC_lu_imsi_auth_tmsi_encr_013_2() );
+       execute( TC_mo_release_timeout() );
 
        execute( TC_lu_and_mt_call() );
 

-- 
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Gerrit-MessageType: newchange
Gerrit-Change-Id: If3e0bee11763f1c6b2cfae91f2a818ff7d0df9e7
Gerrit-PatchSet: 1
Gerrit-Project: osmo-ttcn3-hacks
Gerrit-Branch: master
Gerrit-Owner: dexter <pma...@sysmocom.de>