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authorNeels Hofmeyr <neels@hofmeyr.de>2019-03-08 03:45:43 +0100
committerNeels Hofmeyr <neels@hofmeyr.de>2019-05-07 01:20:09 +0200
commit2ca1ab492a8c5e1aa508df0779c7b7ab34129fe0 (patch)
treecaee00762a205995679ca54be78bd99ab54cb705 /msc
parent61ca08d724c657c6ae4718901d263abac0ba95f8 (diff)
msc: mo and mt voice call tests: add lots of missing parts
Both f_mo_call_establish() and f_mt_call_establish() were testing barely half a voice call setup. For example, f_mo_call_establish() used to be satisfied with just two CRCX, but no actual RTP connections being made. Add numerous MNCC and MGCP messages more closely resembling an actual call. The main reason is to achieve a state that passes both current osmo-msc master as well as the upcoming inter-MSC Handover refactoring. Add log markers to f_*_call_*(): often when a test halts, it is not at all clear why. With these log markers it is saner to figure out what has happened and what hasn't. Change-Id: I162985045bb5e129977a3a797b656e30220990df
Diffstat (limited to 'msc')
-rw-r--r--msc/BSC_ConnectionHandler.ttcn268
-rw-r--r--msc/MSC_Tests.ttcn12
2 files changed, 196 insertions, 84 deletions
diff --git a/msc/BSC_ConnectionHandler.ttcn b/msc/BSC_ConnectionHandler.ttcn
index 1750bf5..44d3c6d 100644
--- a/msc/BSC_ConnectionHandler.ttcn
+++ b/msc/BSC_ConnectionHandler.ttcn
@@ -551,6 +551,8 @@ type record CallParameters {
/* CC related parameters */
hexstring called_party, /* whom are we calling */
integer transaction_id optional, /* which TS 04.08 CC transaction ID to use */
+ boolean mo_call, /* For a MO call, the transaction_id was allocated by the MS,
+ important to set the TI flag properly */
BearerCapability_TLV bearer_cap, /* which bearer capabilities to claim */
boolean emergency, /* is this an emergency call? */
@@ -581,6 +583,7 @@ type record CallParameters {
template (value) CallParameters t_CallParams(hexstring called, integer tid) := {
called_party := called,
transaction_id := tid,
+ mo_call := false,
bearer_cap := valueof(ts_Bcap_voice),
emergency := false,
mncc_callref := omit,
@@ -595,6 +598,7 @@ template (value) CallParameters t_CallParams(hexstring called, integer tid) := {
mgw_rtp_port_mss := 11000,
rtp_payload_type := 98,
rtp_sdp_format := "AMR/8000",
+ mgw_drop_dlcx := false,
mgcp_call_id := omit,
mgcp_ep := omit,
mgcp_connection_id_bss := '0'H,//
@@ -628,12 +632,15 @@ runs on BSC_ConnHdlr {
f_establish_fully(EST_TYPE_PAG_RESP);
+ log("f_mt_call_complete 1");
+
/* MS <- MSC: Expect CC SETUP */
BSSAP.receive(tr_PDU_DTAP_MT(tr_ML3_MT_CC_SETUP(cpars.transaction_id, *, cpars.called_party)));
/* MS -> MSC: ALERTING */
BSSAP.send(ts_PDU_DTAP_MO(ts_ML3_MO_CC_ALERTING(cpars.transaction_id)));
MNCC.receive(tr_MNCC_ALERT_ind(cpars.mncc_callref));
+ log("f_mt_call_complete 2");
/* Create MGCP expect */
f_create_mgcp_expect(ExpectCriteria:{omit,omit,omit});
@@ -642,6 +649,7 @@ runs on BSC_ConnHdlr {
/* First MGCP CRCX (for BSS/RAN side) */
MGCP.receive(tr_CRCX) -> value mgcp_cmd {
+ log("f_mt_call_complete 3");
cpars.mgcp_call_id := f_MgcpCmd_extract_call_id(mgcp_cmd);
/* When the endpoint contains a wildcard we keep the endpoint
@@ -672,21 +680,64 @@ runs on BSC_ConnHdlr {
interleave {
/* Second MGCP CRCX (this time for MSS/CN side) */
[] MGCP.receive(tr_CRCX(cpars.mgcp_ep)) -> value mgcp_cmd {
+ log("f_mt_call_complete 4");
var SDP_Message sdp := valueof(ts_SDP_CRCX_CN(cpars));
MGCP.send(ts_CRCX_ACK(mgcp_cmd.line.trans_id, cpars.mgcp_connection_id_mss, sdp));
- /* MSC acknowledges the MNCC_CREATE to the MNCC handler */
- MNCC.receive(tr_MNCC_RTP_CREATE(cpars.mncc_callref));
}
+
+ /* MSC acknowledges the MNCC_CREATE to the MNCC handler */
+ [] MNCC.receive(tr_MNCC_RTP_CREATE(cpars.mncc_callref)) {
+ log("f_mt_call_complete 5");
+ }
+
/* expect the MSC to trigger a BSSMAP ASSIGNMENT */
[] BSSAP.receive(tr_BSSMAP_AssignmentReq(omit, tla_ass)) {
var BSSMAP_IE_AoIP_TransportLayerAddress tla;
var BSSMAP_IE_SpeechCodec codec;
+ log("f_mt_call_complete 6");
tla := valueof(ts_BSSMAP_IE_AoIP_TLA4(f_inet_addr(cpars.bss_rtp_ip), cpars.bss_rtp_port));
codec := valueof(ts_BSSMAP_IE_SpeechCodec({ts_CodecFR}));
BSSAP.send(ts_BSSMAP_AssignmentComplete(omit, tla, codec));
+
+ BSSAP.send(ts_PDU_DTAP_MO(ts_ML3_MO_CC_CONNECT(cpars.transaction_id)));
+ }
+
+ [] MNCC.receive(tr_MNCC_SETUP_cnf(cpars.mncc_callref)) {
+ log("f_mt_call_complete 7");
+ MNCC.send(ts_MNCC_RTP_CONNECT(cpars.mncc_callref,
+ /* ip 42.23.11.5 */ hex2int('42231105'H),
+ /* port 423 */ 423,
+ /* payload type 3 = GSM FR */ 3));
+ }
+
+ /* MDCX setting up the RAN side remote RTP address received from Assignment Complete */
+ [] MGCP.receive(tr_MDCX) -> value mgcp_cmd {
+ log("f_mt_call_complete 8");
+ var SDP_Message sdp := valueof(ts_SDP(cpars.mgw_rtp_ip_mss, cpars.mgw_rtp_ip_mss,
+ hex2str(cpars.mgcp_call_id), "42",
+ cpars.mgw_rtp_port_mss,
+ { int2str(cpars.rtp_payload_type) },
+ { valueof(ts_SDP_rtpmap(cpars.rtp_payload_type,
+ cpars.rtp_sdp_format)),
+ valueof(ts_SDP_ptime(20)) }));
+ MGCP.send(ts_MDCX_ACK(mgcp_cmd.line.trans_id, cpars.mgcp_connection_id_mss, sdp));
+ }
+
+ /* MDCX setting up the CN side remote RTP address received from MNCC CONNECT */
+ [] MGCP.receive(tr_MDCX) -> value mgcp_cmd {
+ log("f_mt_call_complete 9");
+ var SDP_Message sdp := valueof(ts_SDP(cpars.mgw_rtp_ip_mss, cpars.mgw_rtp_ip_mss,
+ hex2str(cpars.mgcp_call_id), "42",
+ cpars.mgw_rtp_port_mss,
+ { int2str(cpars.rtp_payload_type) },
+ { valueof(ts_SDP_rtpmap(cpars.rtp_payload_type,
+ cpars.rtp_sdp_format)),
+ valueof(ts_SDP_ptime(20)) }));
+ MGCP.send(ts_MDCX_ACK(mgcp_cmd.line.trans_id, cpars.mgcp_connection_id_mss, sdp));
}
+
}
} else {
var template TransportLayerAddress rab_tla := ? /* FIXME: encode the mgw_rtp_ip_bss/mgw_rtp_port_bss */
@@ -702,12 +753,12 @@ runs on BSC_ConnHdlr {
[] BSSAP.receive(tr_RANAP_RabAssReq(rab_sml)) {
//BSSAP.send(ts_RANAP_RabAssResp(rab_sml)); FIXME
}
+
+ /* FIXME: same MNCC and MGCP as in 2G above */
}
}
- /* MS -> MSC: ALERTING */
- BSSAP.send(ts_PDU_DTAP_MO(ts_ML3_MO_CC_CONNECT(cpars.transaction_id)));
- MNCC.receive(tr_MNCC_SETUP_cnf(cpars.mncc_callref));
+ log("f_mt_call_complete DONE");
}
function f_expect_paging(boolean by_tmsi := true)
@@ -757,15 +808,20 @@ runs on BSC_ConnHdlr {
} else {
BSSAP.send(ts_PDU_DTAP_MO(ts_ML3_MO_CC_SETUP(cpars.transaction_id, cpars.called_party)));
}
+
+ var BSSMAP_IE_AoIP_TransportLayerAddress tla_ass :=
+ valueof(ts_BSSMAP_IE_AoIP_TLA4(f_inet_addr(cpars.mgw_rtp_ip_bss),cpars.mgw_rtp_port_bss));
+
interleave {
[] MNCC.receive(tr_MNCC_SETUP_ind(?, tr_MNCC_number(hex2str(cpars.called_party)))) -> value mncc {
+ log("f_mo_call_establish 1: rx MNCC SETUP ind");
cpars.mncc_callref := mncc.u.signal.callref;
- /* Call Proceeding */
- 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)));
- };
+ MNCC.send(ts_MNCC_RTP_CREATE(cpars.mncc_callref));
+ }
+
/* First MGCP CRCX (for BSS/RAN side) */
[] MGCP.receive(tr_CRCX) -> value mgcp_cmd {
+ log("f_mo_call_establish 2: rx 1st CRCX");
cpars.mgcp_call_id := f_MgcpCmd_extract_call_id(mgcp_cmd);
/* When the endpoint contains a wildcard we keep the endpoint
@@ -788,64 +844,94 @@ runs on BSC_ConnHdlr {
f_mgcp_par_append(mgcp_resp.params, ts_MgcpParSpecEP(cpars.mgcp_ep));
MGCP.send(mgcp_resp);
}
- }
- if (g_pars.ran_is_geran) {
- var BSSMAP_IE_AoIP_TransportLayerAddress tla_ass :=
- valueof(ts_BSSMAP_IE_AoIP_TLA4(f_inet_addr(cpars.mgw_rtp_ip_bss),cpars.mgw_rtp_port_bss));
+ [] MNCC.receive(tr_MNCC_RTP_CREATE(cpars.mncc_callref)) {
+ log("f_mo_call_establish 3: rx RTP CREATE");
+ /* Call Proceeding */
+ 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)));
- interleave {
- /* Second MGCP CRCX (this time for MSS/CN side) */
- [] MGCP.receive(tr_CRCX(cpars.mgcp_ep)) -> value mgcp_cmd {
- var SDP_Message sdp := valueof(ts_SDP_CRCX_CN(cpars));
- MGCP.send(ts_CRCX_ACK(mgcp_cmd.line.trans_id, cpars.mgcp_connection_id_mss, sdp));
+ /* Alerting */
+ MNCC.send(ts_MNCC_ALERT_req(cpars.mncc_callref));
+ }
- /* Alerting */
- MNCC.send(ts_MNCC_ALERT_req(cpars.mncc_callref));
- }
+ //[g_pars.ran_is_geran] BSSAP.receive(tr_BSSMAP_AssignmentReq(omit, tla_ass)) {
+ [] BSSAP.receive(tr_BSSMAP_AssignmentReq(omit, tla_ass)) {
+ log("f_mo_call_establish 4: rx Assignment Request");
+ var BSSMAP_IE_AoIP_TransportLayerAddress tla;
+ var BSSMAP_IE_SpeechCodec codec;
+ tla := valueof(ts_BSSMAP_IE_AoIP_TLA4(f_inet_addr(cpars.bss_rtp_ip), cpars.bss_rtp_port));
+ codec := valueof(ts_BSSMAP_IE_SpeechCodec({ts_CodecFR}));
+ BSSAP.send(ts_BSSMAP_AssignmentComplete(omit, tla, codec));
+ }
+ /*
+ [!g_pars.ran_is_geran] BSSAP.receive(tr_RANAP_RabAssReq(rab_sml)) {
+ //BSSAP.send(ts_RANAP_RabAssResp(rab_sml)); FIXME
+ }
+ */
- [] BSSAP.receive(tr_PDU_DTAP_MT(tr_ML3_MT_CC_ALERTING(cpars.transaction_id))) {
- }
- /* expect AoIP IP/Port to match what we returned in CRCX_ACK above */
- [] BSSAP.receive(tr_BSSMAP_AssignmentReq(omit, tla_ass)) {
- var BSSMAP_IE_AoIP_TransportLayerAddress tla;
- var BSSMAP_IE_SpeechCodec codec;
- tla := valueof(ts_BSSMAP_IE_AoIP_TLA4(f_inet_addr(cpars.bss_rtp_ip), cpars.bss_rtp_port));
- codec := valueof(ts_BSSMAP_IE_SpeechCodec({ts_CodecFR}));
- BSSAP.send(ts_BSSMAP_AssignmentComplete(omit, tla, codec));
- }
+ /* MDCX setting up the RAN side remote RTP address received from Assignment Complete */
+ [] MGCP.receive(tr_MDCX) -> value mgcp_cmd {
+ log("f_mo_call_establish 5: rx MDCX for the RAN side");
+ var SDP_Message sdp := valueof(ts_SDP(cpars.mgw_rtp_ip_mss, cpars.mgw_rtp_ip_mss,
+ hex2str(cpars.mgcp_call_id), "42",
+ cpars.mgw_rtp_port_mss,
+ { int2str(cpars.rtp_payload_type) },
+ { valueof(ts_SDP_rtpmap(cpars.rtp_payload_type,
+ cpars.rtp_sdp_format)),
+ valueof(ts_SDP_ptime(20)) }));
+ MGCP.send(ts_MDCX_ACK(mgcp_cmd.line.trans_id, cpars.mgcp_connection_id_mss, sdp));
}
- } else {
- var template TransportLayerAddress rab_tla := ?; /* FIXME: encode the mgw_rtp_ip_bss/mgw_rtp_port_bss */
- var template RAB_SetupOrModifyList rab_sml := tr_RAB_SML(rab_id := ?, tla := rab_tla, binding_id := ?);
- interleave {
- /* Second MGCP CRCX (this time for MSS/CN side) */
- [] MGCP.receive(tr_CRCX(cpars.mgcp_ep)) -> value mgcp_cmd {
- var SDP_Message sdp := valueof(ts_SDP_CRCX_CN(cpars));
- MGCP.send(ts_CRCX_ACK(mgcp_cmd.line.trans_id, cpars.mgcp_connection_id_mss, sdp));
+ /* Second MGCP CRCX (this time for MSS/CN side) */
+ [] MGCP.receive(tr_CRCX(cpars.mgcp_ep)) -> value mgcp_cmd {
+ log("f_mo_call_establish 6: rx 2nd CRCX, for CN side");
+ var SDP_Message sdp := valueof(ts_SDP_CRCX_CN(cpars));
+ MGCP.send(ts_CRCX_ACK(mgcp_cmd.line.trans_id, cpars.mgcp_connection_id_mss, sdp));
+ }
- /* Alerting */
- MNCC.send(ts_MNCC_ALERT_req(cpars.mncc_callref));
- }
+ [] BSSAP.receive(tr_PDU_DTAP_MT(tr_ML3_MT_CC_ALERTING(cpars.transaction_id))) {
+ log("f_mo_call_establish 7: rx CC Alerting");
+ cpars.mncc_callref := mncc.u.signal.callref;
+ /* Call Proceeding */
+ MNCC.send(ts_MNCC_RTP_CONNECT(cpars.mncc_callref,
+ /* ip 42.23.11.5 */ hex2int('42231105'H),
+ /* port 423 */ 423,
+ /* payload type 3 = GSM FR */ 3));
+ MNCC.send(ts_MNCC_SETUP_rsp(cpars.mncc_callref));
+ }
- [] BSSAP.receive(tr_PDU_DTAP_MT(tr_ML3_MT_CC_ALERTING(cpars.transaction_id))) {
- }
+ [] MNCC.receive(tr_MNCC_SETUP_COMPL_ind(?)) -> value mncc {
+ log("f_mo_call_establish 8: rx MNCC SETUP COMPLETE ind");
+ }
- [] BSSAP.receive(tr_RANAP_RabAssReq(rab_sml)) {
- //BSSAP.send(ts_RANAP_RabAssResp(rab_sml)); FIXME
- }
+ /* second MDCX setting up the CN side remote RTP address and codec received from MNCC RTP CONNECT */
+ [] MGCP.receive(tr_MDCX) -> value mgcp_cmd {
+ log("f_mo_call_establish 9: rx MDCX for CN side");
+ var SDP_Message sdp := valueof(ts_SDP(cpars.mgw_rtp_ip_mss, cpars.mgw_rtp_ip_mss,
+ hex2str(cpars.mgcp_call_id), "42",
+ cpars.mgw_rtp_port_mss,
+ { int2str(cpars.rtp_payload_type) },
+ { valueof(ts_SDP_rtpmap(cpars.rtp_payload_type,
+ cpars.rtp_sdp_format)),
+ valueof(ts_SDP_ptime(20)) }));
+ MGCP.send(ts_MDCX_ACK(mgcp_cmd.line.trans_id, cpars.mgcp_connection_id_mss, sdp));
}
- }
- /* Answer. MNCC_SETUP_RSP -> CONNECT to MS; CONNECT_ACK from MS */
- MNCC.send(ts_MNCC_SETUP_rsp(cpars.mncc_callref));
- BSSAP.receive(tr_PDU_DTAP_MT(tr_ML3_MT_CC_CONNECT(cpars.transaction_id)));
- BSSAP.send(ts_PDU_DTAP_MO(ts_ML3_MO_CC_CONNECT_ACK(cpars.transaction_id)));
+ [] BSSAP.receive(tr_PDU_DTAP_MT(tr_ML3_MT_CC_CONNECT(cpars.transaction_id))) {
+ log("f_mo_call_establish 10: rx CC CONNECT");
+ BSSAP.send(ts_PDU_DTAP_MO(ts_ML3_MO_CC_CONNECT_ACK(cpars.transaction_id)));
+ }
+ }
+ log("f_mo_call_establish DONE");
setverdict(pass);
}
+private altstep as_optional_mgcp_mdcx() runs on BSC_ConnHdlr {
+ [] MGCP.receive(tr_MDCX) {};
+}
+
function f_call_hangup(inout CallParameters cpars, boolean release_by_ms, boolean is_csfb := false)
runs on BSC_ConnHdlr {
@@ -853,63 +939,81 @@ runs on BSC_ConnHdlr {
var MNCC_PDU mncc;
var MgcpCommand mgcp_cmd;
var boolean respond_to_dlcx;
+ var boolean dlcx_contained_ci := false;
+ var template PDU_BSSAP t_clear := tr_BSSMAP_ClearCommand;
+
+ if (is_csfb) {
+ t_clear := tr_BSSMAP_ClearCommandCSFB;
+ }
+
MNCC.send(ts_MNCC_DISC_req(cpars.mncc_callref, valueof(ts_MNCC_cause(23))));
BSSAP.receive(tr_PDU_DTAP_MT(tr_ML3_MT_CC_DISC(cpars.transaction_id)));
+ log("f_call_hangup 1: rx DTAP CC DISC");
+
if (release_by_ms) {
+ var BIT1 tid_remote := '1'B;
+ if (cpars.mo_call) {
+ tid_remote := '0'B;
+ }
/* B-side (MS) Release of call */
- BSSAP.send(ts_PDU_DTAP_MO(ts_ML3_MO_CC_RELEASE(cpars.transaction_id, '1'B, '0000000'B)));
+ BSSAP.send(ts_PDU_DTAP_MO(ts_ML3_MO_CC_RELEASE(cpars.transaction_id, tid_remote, '0000000'B)));
MNCC.receive(tr_MNCC_REL_ind(cpars.mncc_callref));
+ log("f_call_hangup 2: rx MNCC REL ind");
BSSAP.receive(tr_PDU_DTAP_MT(tr_ML3_MT_CC_REL_COMPL(cpars.transaction_id)));
+ log("f_call_hangup 3: rx DTAP CC REL COMPL");
} else {
/* A-side (PLMN) Release of call */
MNCC.send(ts_MNCC_REL_req(cpars.mncc_callref, valueof(ts_MNCC_cause(42))));
BSSAP.receive(tr_PDU_DTAP_MT(tr_ML3_MT_CC_RELEASE(cpars.transaction_id)));
+ log("f_call_hangup 4: rx DTAP CC RELEASE");
BSSAP.send(ts_PDU_DTAP_MO(ts_ML3_MO_CC_REL_COMPL(cpars.transaction_id)));
}
respond_to_dlcx := not (isbound(cpars.mgw_drop_dlcx) and valueof(cpars.mgw_drop_dlcx));
- /* clearing of radio channel */
- if (g_pars.ran_is_geran) {
- var template PDU_BSSAP t_clear := tr_BSSMAP_ClearCommand;
- if (is_csfb) {
- t_clear := tr_BSSMAP_ClearCommandCSFB;
- }
+ var default mdcx := activate(as_optional_mgcp_mdcx());
- interleave {
- [] BSSAP.receive(t_clear) {
- BSSAP.send(ts_BSSMAP_ClearComplete);
- BSSAP.receive(RAN_Conn_Prim:MSC_CONN_PRIM_DISC_IND);
- }
- [] MGCP.receive(tr_DLCX(?)) -> value mgcp_cmd {
+ /* clearing of radio channel */
+ interleave {
+ //[g_pars.ran_is_geran] BSSAP.receive(t_clear) {
+ [] BSSAP.receive(t_clear) {
+ log("f_call_hangup 5: rx BSSAP Clear Command");
+ BSSAP.send(ts_BSSMAP_ClearComplete);
+ BSSAP.receive(RAN_Conn_Prim:MSC_CONN_PRIM_DISC_IND);
+ log("f_call_hangup 6: rx SCCP DISC");
+ }
+ /*
+ [!g_pars.ran_is_geran] BSSAP.receive(t_iurel) {
+ BSSAP.send(ts_RANAP_IuReleaseComplete);
+ BSSAP.receive(RAN_Conn_Prim:MSC_CONN_PRIM_DISC_IND);
+ }
+ */
+ [] MGCP.receive(tr_DLCX(?)) -> value mgcp_cmd {
+ log("f_call_hangup 7: rx MGCP DLCX");
if (respond_to_dlcx) {
- /* TODO: For one or all connections on EP? */
MGCP.send(ts_DLCX_ACK2(mgcp_cmd.line.trans_id));
- f_create_mgcp_delete_ep(cpars.mgcp_ep);
- }
}
+ dlcx_contained_ci := f_MgcpCmd_contains_par(mgcp_cmd, "I");
}
- } else {
- var template RANAP_PDU t_iurel := tr_RANAP_IuReleaseCommand(?);
- if (is_csfb) {
- /* FIXME! */
- }
- interleave {
- [] BSSAP.receive(t_iurel) {
- BSSAP.send(ts_RANAP_IuReleaseComplete);
- BSSAP.receive(RAN_Conn_Prim:MSC_CONN_PRIM_DISC_IND);
- }
- [] MGCP.receive(tr_DLCX(?)) -> value mgcp_cmd {
+ }
+
+ /* Two DLCXes expected, one for RAN and one for CN side.
+ * Unless the first DLCX did not contain a CI, in which case it was a wildcard DLCX for both. */
+ if (dlcx_contained_ci) {
+ MGCP.receive(tr_DLCX(?)) -> value mgcp_cmd {
+ log("f_call_hangup 8: rx MGCP DLCX");
if (respond_to_dlcx) {
- /* TODO: For one or all connections on EP? */
MGCP.send(ts_DLCX_ACK2(mgcp_cmd.line.trans_id));
- f_create_mgcp_delete_ep(cpars.mgcp_ep);
- }
}
}
}
+ f_create_mgcp_delete_ep(cpars.mgcp_ep);
+ log("f_call_hangup 9: done");
+
+ deactivate(mdcx);
+
setverdict(pass);
}
diff --git a/msc/MSC_Tests.ttcn b/msc/MSC_Tests.ttcn
index d4be96b..709a73c 100644
--- a/msc/MSC_Tests.ttcn
+++ b/msc/MSC_Tests.ttcn
@@ -157,8 +157,16 @@ private altstep as_Tguard_direct() runs on MTC_CT {
}
}
-private altstep as_optional_cc_rel(CallParameters cpars) runs on BSC_ConnHdlr {
- [] BSSAP.receive(tr_PDU_DTAP_MT(tr_ML3_MT_CC_RELEASE(cpars.transaction_id))) { repeat; };
+private altstep as_optional_cc_rel(CallParameters cpars, boolean respond := false) runs on BSC_ConnHdlr {
+ [] BSSAP.receive(tr_PDU_DTAP_MT(tr_ML3_MT_CC_RELEASE(cpars.transaction_id))) {
+ if (respond) {
+ var BIT1 tid_remote := '1'B;
+ if (cpars.mo_call) {
+ tid_remote := '0'B;
+ }
+ BSSAP.send(ts_PDU_DTAP_MO(ts_ML3_MO_CC_REL_COMPL(cpars.transaction_id, tid_remote)));
+ }
+ }
}
function f_init_smpp(charstring id) runs on MTC_CT {