neels has uploaded this change for review. (
https://gerrit.osmocom.org/c/osmo-ttcn3-hacks/+/25070 )
Change subject: msc: add MSC_Tests.TC_call_re_establishment
......................................................................
msc: add MSC_Tests.TC_call_re_establishment
The osmo-msc patch that makes this test pass is
I6fa37d6ca9fcb1637742b40e37b68d67664c9b60
Related: SYS#5130
Change-Id: Ifdff5573eeb3b3d41e8599b9b0228411d2576864
---
M msc/MSC_Tests.ttcn
1 file changed, 107 insertions(+), 0 deletions(-)
git pull ssh://gerrit.osmocom.org:29418/osmo-ttcn3-hacks
refs/changes/70/25070/1
diff --git a/msc/MSC_Tests.ttcn b/msc/MSC_Tests.ttcn
index ecfe5f9..428dae3 100644
--- a/msc/MSC_Tests.ttcn
+++ b/msc/MSC_Tests.ttcn
@@ -6626,6 +6626,111 @@
vc_conn.done;
}
+const charstring REEST_LOST_CONNECTION := "REEST_LOST_CONNECTION";
+const charstring REEST_CLEARED := "REEST_CLEARED";
+
+friend function f_tc_call_re_establishment_1(charstring id, BSC_ConnHdlrPars
pars)
+ runs on BSC_ConnHdlr {
+ f_init_handler(pars, t_guard := 30.0);
+
+ f_perform_lu();
+
+ var CallParameters cpars := valueof(t_CallParams('12345'H, 0));
+ f_mo_call_establish(cpars);
+ f_sleep(3.0);
+ COORD.send(REEST_LOST_CONNECTION);
+ COORD.send(cpars);
+ f_expect_clear(verify_vlr_cell_id := false);
+ COORD.send(REEST_CLEARED);
+}
+
+friend function f_tc_call_re_establishment_2(charstring id, BSC_ConnHdlrPars
pars)
+ runs on BSC_ConnHdlr {
+ f_init_handler(pars, t_guard := 30.0);
+ var CallParameters cpars;
+
+ COORD.receive(REEST_LOST_CONNECTION);
+ COORD.receive(tr_CallParams) -> value cpars;
+
+ /* The MS has lost the first channel and decides to show up on a new
conn (on a nearby neighbor cell) to ask for
+ * CM Re-Establishment. Send a Complete Layer 3 to osmo-msc with a CM
Re-Establishment Request. */
+ var MobileIdentityLV mi := valueof(ts_MI_IMSI_LV(g_pars.imsi));
+ var PDU_ML3_MS_NW l3_info := valueof(ts_CM_REESTABL_REQ(mi));
+ f_cl3_or_initial_ue(l3_info);
+
+ /* At this point the other test component should receive the Clear
Command for the first A connection. */
+
+ /* This new connection continues with Authentication... */
+ f_mm_common();
+
+ /* ...and with Assignment of a voice channel. */
+ var template BSSMAP_IE_AoIP_TransportLayerAddress tla_ass :=
+ f_tr_BSSMAP_IE_AoIP_TLA(cpars.mgw_conn_1.mgw_rtp_ip, ?);
+ BSSAP.receive(tr_BSSMAP_AssignmentReq(omit, tla_ass));
+ /* By this Assignment Request, the CM Re-Establishment Request is
implicitly accepted. */
+
+ /* Send Assignment Complete from BSC */
+ var template BSSMAP_IE_AoIP_TransportLayerAddress tla;
+ tla := f_ts_BSSMAP_IE_AoIP_TLA(cpars.bss_rtp_ip, cpars.bss_rtp_port);
+ var BSSMAP_IE_SpeechCodec codec;
+ codec := valueof(ts_BSSMAP_IE_SpeechCodec({ts_CodecFR}));
+
+ /* Make really sure the other component is done with its MGCP */
+ COORD.receive(REEST_CLEARED);
+
+ /* Transfer state for this call over to this test component so we can
resolve MNCC and MGCP in this function. */
+ f_create_mncc_steal_call(cpars.mncc_callref);
+ f_create_mgcp_steal_ep(cpars.mgcp_ep);
+
+ /* osmo-msc may redirect the MGW endpoint to the newly allocated
channel.
+ * Apparently osmo-msc currently also sends an MDCX to the CN side,
just repeating the same configuration that
+ * is already in use. This test accepts any number of or even lack of
MDCX. */
+ var default ack_mdcx := activate(as_mgcp_ack_all_mdcx(cpars));
+
+ BSSAP.send(ts_BSSMAP_AssignmentComplete(omit, tla, codec));
+ /* The call has been fully re-established.
+ * Let a bit of time pass before hanging up, for everything to settle.
*/
+ f_sleep(3.0);
+
+ deactivate(ack_mdcx);
+
+ /* Hang up the call and clear the new, second A connection */
+ var default ack_dlcx := activate(as_mgcp_ack_all_dlcx(cpars));
+
+ /* CC release. This is the proper MS initiated release sequence as
shown by
+ *
https://git.osmocom.org/osmo-msc/tree/doc/sequence_charts/voice_call_full.msc?id=e53ecde83e4fb2470209e818e9ad76a2d6a19190
+ * f_call_hangup() seems a bit mixed up, so here a "proper" sequence.
Fix of f_call_hangup() pending. */
+ BSSAP.send(ts_PDU_DTAP_MO(ts_ML3_MO_CC_DISC(cpars.transaction_id, '0'B,
'0000000'B)));
+ MNCC.receive(tr_MNCC_DISC_ind(cpars.mncc_callref));
+ MNCC.send(ts_MNCC_REL_req(cpars.mncc_callref,
valueof(ts_MNCC_cause(23))));
+
BSSAP.receive(tr_PDU_DTAP_MT(tr_ML3_MT_CC_RELEASE(cpars.transaction_id)));
+ BSSAP.send(ts_PDU_DTAP_MO(ts_ML3_MO_CC_REL_COMPL(cpars.transaction_id,
'0'B)));
+ MNCC.receive(tr_MNCC_REL_cnf(cpars.mncc_callref, cause := *));
+
+ /* BSSAP clear */
+ interleave {
+ [] BSSAP.receive(tr_BSSMAP_ClearCommand) {
+ BSSAP.send(ts_BSSMAP_ClearComplete);
+ }
+ [] BSSAP.receive(RAN_Conn_Prim:MSC_CONN_PRIM_DISC_IND);
+ }
+
+ f_sleep(1.0);
+ deactivate(ack_dlcx);
+}
+
+testcase TC_call_re_establishment() runs on MTC_CT {
+ var BSC_ConnHdlr vc_conn1;
+ var BSC_ConnHdlr vc_conn2;
+ f_init();
+ vc_conn1 := f_start_handler(refers(f_tc_call_re_establishment_1), 91,
verify_cell_id := false);
+ vc_conn2 := f_start_handler(refers(f_tc_call_re_establishment_2), 91,
verify_cell_id := false);
+ connect(vc_conn1:COORD, vc_conn2:COORD);
+ vc_conn1.done;
+ vc_conn2.done;
+}
+
+
control {
execute( TC_cr_before_reset() );
execute( TC_lu_imsi_noauth_tmsi() );
@@ -6784,6 +6889,8 @@
execute( TC_lu_and_expire_while_paging() );
execute( TC_paging_response_imsi_unknown() );
execute( TC_paging_response_tmsi_unknown() );
+
+ execute( TC_call_re_establishment() );
}
--
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Gerrit-Project: osmo-ttcn3-hacks
Gerrit-Branch: master
Gerrit-Change-Id: Ifdff5573eeb3b3d41e8599b9b0228411d2576864
Gerrit-Change-Number: 25070
Gerrit-PatchSet: 1
Gerrit-Owner: neels <nhofm...@sysmocom.de>
Gerrit-MessageType: newchange
