Change in osmo-ttcn3-hacks[master]: bsc: Introduce Osmux infra and one test for osmo-bsc

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Harald Welte gerrit-no-reply at lists.osmocom.org
Mon May 27 09:56:52 UTC 2019


Harald Welte has submitted this change and it was merged. ( https://gerrit.osmocom.org/14105 )

Change subject: bsc: Introduce Osmux infra and one test for osmo-bsc
......................................................................

bsc: Introduce Osmux infra and one test for osmo-bsc

Test verifies once osmux is enabled in osmo-bsc, BSSMAP RESET (ACK)
contains Osmux Support IE and that it correctly handles BSSMAP ASsign
Req with Osmux CID.

Related: OS#2551
Depends: osmo-bsc 6de754cdde5319af3059d8fc6abf85037ec7eacc
Depends: titan.ProtocolModules.BSSMAP Iaf1e137269c0da20b2c96fd104b57edf336693af
Change-Id: If69c716dc06d61d810c32d1720a237c7535baca8
---
M bsc-nat/BSC_MS_ConnectionHandler.ttcn
M bsc-nat/MSC_ConnectionHandler.ttcn
M bsc/BSC_Tests.ttcn
M bsc/MSC_ConnectionHandler.ttcn
M bsc/expected-results.xml
M library/MGCP_Templates.ttcn
M library/RAN_Emulation.ttcnpp
M msc/BSC_ConnectionHandler.ttcn
8 files changed, 129 insertions(+), 34 deletions(-)

Approvals:
  Harald Welte: Looks good to me, approved
  Jenkins Builder: Verified



diff --git a/bsc-nat/BSC_MS_ConnectionHandler.ttcn b/bsc-nat/BSC_MS_ConnectionHandler.ttcn
index e52b678..28ff349 100644
--- a/bsc-nat/BSC_MS_ConnectionHandler.ttcn
+++ b/bsc-nat/BSC_MS_ConnectionHandler.ttcn
@@ -54,6 +54,7 @@
 	decode_dtap := false,
 	role_ms := true,
 	protocol := RAN_PROTOCOL_BSSAP,
+	use_osmux := false,
 	sccp_addr_local := omit,
 	sccp_addr_peer := omit
 }
diff --git a/bsc-nat/MSC_ConnectionHandler.ttcn b/bsc-nat/MSC_ConnectionHandler.ttcn
index 8635a29..36fdf85 100644
--- a/bsc-nat/MSC_ConnectionHandler.ttcn
+++ b/bsc-nat/MSC_ConnectionHandler.ttcn
@@ -60,6 +60,7 @@
 	decode_dtap := false,
 	role_ms := false,
 	protocol := RAN_PROTOCOL_BSSAP,
+	use_osmux := false,
 	sccp_addr_local := omit,
 	sccp_addr_peer := omit
 }
diff --git a/bsc/BSC_Tests.ttcn b/bsc/BSC_Tests.ttcn
index 0583b30..c731b7c 100644
--- a/bsc/BSC_Tests.ttcn
+++ b/bsc/BSC_Tests.ttcn
@@ -89,6 +89,9 @@
 	/* are we initialized yet */
 	var boolean g_initialized := false;
 
+	/* Osmux is enabled through VTY */
+	var boolean g_osmux_enabled := false;
+
 	/* global test case guard timer */
 	timer T_guard := 30.0;
 
@@ -140,16 +143,16 @@
 private function f_legacy_bssap_reset() runs on test_CT {
 	var BSSAP_N_UNITDATA_ind ud_ind;
 	timer T := 5.0;
-	BSSAP.send(ts_BSSAP_UNITDATA_req(g_bssap.sccp_addr_peer, g_bssap.sccp_addr_own, ts_BSSMAP_Reset(0)));
+	BSSAP.send(ts_BSSAP_UNITDATA_req(g_bssap.sccp_addr_peer, g_bssap.sccp_addr_own, ts_BSSMAP_Reset(0, g_osmux_enabled)));
 	T.start;
 	alt {
-	[] BSSAP.receive(tr_BSSAP_UNITDATA_ind(g_bssap.sccp_addr_own, g_bssap.sccp_addr_peer, tr_BSSMAP_ResetAck)) {
+	[] BSSAP.receive(tr_BSSAP_UNITDATA_ind(g_bssap.sccp_addr_own, g_bssap.sccp_addr_peer, tr_BSSMAP_ResetAck(g_osmux_enabled))) {
 		log("Received RESET-ACK in response to RESET, we're ready to go!");
 		}
-	[] BSSAP.receive(tr_BSSAP_UNITDATA_ind(?, ?, tr_BSSMAP_Reset)) -> value ud_ind {
+	[] BSSAP.receive(tr_BSSAP_UNITDATA_ind(?, ?, tr_BSSMAP_Reset(g_osmux_enabled))) -> value ud_ind {
 		log("Respoding to inbound RESET with RESET-ACK");
 		BSSAP.send(ts_BSSAP_UNITDATA_req(ud_ind.callingAddress, ud_ind.calledAddress,
-			   ts_BSSMAP_ResetAck));
+			   ts_BSSMAP_ResetAck(g_osmux_enabled)));
 		repeat;
 		}
 	[] BSSAP.receive { repeat; }
@@ -257,15 +260,15 @@
 			mtc.stop;
 		}
 	/* always respond with RESET ACK to RESET */
-	[] BSSAP.receive(tr_BSSAP_UNITDATA_ind(?, ?, tr_BSSMAP_Reset)) -> value ud_ind {
+	[] BSSAP.receive(tr_BSSAP_UNITDATA_ind(?, ?, tr_BSSMAP_Reset(g_osmux_enabled))) -> value ud_ind {
 		BSSAP.send(ts_BSSAP_UNITDATA_req(ud_ind.callingAddress, ud_ind.calledAddress,
-			   ts_BSSMAP_ResetAck));
+			   ts_BSSMAP_ResetAck(g_osmux_enabled)));
 		repeat;
 		}
 }
 
 altstep no_bssmap_reset() runs on test_CT {
-	[] BSSAP.receive(tr_BSSAP_UNITDATA_ind(?, ?, tr_BSSMAP_Reset)) {
+	[] BSSAP.receive(tr_BSSAP_UNITDATA_ind(?, ?, tr_BSSMAP_Reset(g_osmux_enabled))) {
 		setverdict(fail, "unexpected BSSMAP Reset");
 		mtc.stop;
 	}
@@ -289,6 +292,22 @@
 	vc_MGCP.start(MGCP_Emulation.main(ops, mgcp_pars, id));
 }
 
+/* Enable or disable (current default) Osmux. When enabling, BSSMAP Reset
+ * contains extra IE (OsmuxSupport) and osmo-bsc will handle AssignReq with
+ * OsmuxCID IE.
+ */
+private function f_vty_allow_osmux(boolean allow) runs on test_CT {
+	f_vty_enter_cfg_msc(BSCVTY, 0);
+	if (allow) {
+		f_vty_transceive(BSCVTY, "osmux on");
+	} else {
+		f_vty_transceive(BSCVTY, "osmux off");
+	}
+	f_vty_transceive(BSCVTY, "exit");
+	f_vty_transceive(BSCVTY, "exit");
+	g_osmux_enabled := allow;
+}
+
 function f_init_vty(charstring id := "foo") runs on test_CT {
 	if (BSCVTY.checkstate("Mapped")) {
 		/* skip initialization if already executed once */
@@ -302,7 +321,7 @@
 /* global initialization function
  * \param nr_bts Number of BTSs we should start/bring up
  * \param handler_mode Start an RSL_Emulation_CT component (true) or not (false) */
-function f_init(integer nr_bts := NUM_BTS, boolean handler_mode := false) runs on test_CT {
+function f_init(integer nr_bts := NUM_BTS, boolean handler_mode := false, boolean allow_osmux := false) runs on test_CT {
 	var integer i;
 
 	if (g_initialized) {
@@ -313,10 +332,15 @@
 	T_guard.start;
 	activate(as_Tguard());
 
+	f_init_vty("VirtMSC");
+	f_vty_allow_osmux(allow_osmux);
+
 	/* Call a function of our 'parent component' RAN_Adapter_CT to start the
 	 * MSC-side BSSAP emulation */
 	if (handler_mode) {
-		f_ran_adapter_init(g_bssap, mp_bssap_cfg, "VirtMSC", MSC_RanOps);
+		var RanOps ranops := MSC_RanOps;
+		ranops.use_osmux := g_osmux_enabled;
+		f_ran_adapter_init(g_bssap, mp_bssap_cfg, "VirtMSC", ranops);
 		f_ran_adapter_start(g_bssap);
 	} else {
 		f_ran_adapter_init(g_bssap, mp_bssap_cfg, "VirtMSC", omit);
@@ -328,7 +352,6 @@
 	f_ipa_ctrl_start(mp_bsc_ip, mp_bsc_ctrl_port);
 
 	f_init_mgcp("VirtMSC");
-	f_init_vty("VirtMSC");
 
 	for (i := 0; i < nr_bts; i := i+1) {
 		/* wait until osmo-bts-omldummy has respawned */
@@ -605,15 +628,24 @@
 }
 
 /* generate an assignment request for either AoIP or SCCPlite */
-function f_gen_ass_req() return PDU_BSSAP {
+function f_gen_ass_req(boolean osmux_enabled := false) return PDU_BSSAP {
 	var PDU_BSSAP ass_cmd;
+	var BSSMAP_IE_Osmo_OsmuxCID osmux_cid := valueof(ts_OsmuxCID(0));
 	if (mp_bssap_cfg.transport == BSSAP_TRANSPORT_AoIP) {
 		var BSSMAP_IE_AoIP_TransportLayerAddress tla :=
 						valueof(ts_BSSMAP_IE_AoIP_TLA4('01020304'O, 2342));
-		ass_cmd := valueof(ts_BSSMAP_AssignmentReq(omit, tla));
+		if (osmux_enabled) {
+			ass_cmd := valueof(ts_BSSMAP_AssignmentReq(omit, tla, osmux_cid));
+		} else {
+			ass_cmd := valueof(ts_BSSMAP_AssignmentReq(omit, tla));
+		}
 	} else {
 		var BSSMAP_IE_CircuitIdentityCode cic := valueof(ts_BSSMAP_IE_CIC(0,1));
-		ass_cmd := valueof(ts_BSSMAP_AssignmentReq(cic, omit));
+		if (osmux_enabled) {
+			ass_cmd := valueof(ts_BSSMAP_AssignmentReq(cic, omit, osmux_cid));
+		} else {
+			ass_cmd := valueof(ts_BSSMAP_AssignmentReq(cic, omit));
+		}
 	}
 	return ass_cmd;
 }
@@ -632,13 +664,22 @@
 }
 
 /* generate an assignment complete template for either AoIP or SCCPlite */
-function f_gen_exp_compl() return template PDU_BSSAP {
+function f_gen_exp_compl(boolean expect_osmux := false) return template PDU_BSSAP {
 	var template PDU_BSSAP exp_compl;
+	var BSSMAP_IE_Osmo_OsmuxCID osmux_cid := valueof(ts_OsmuxCID(0));
 	if (mp_bssap_cfg.transport == BSSAP_TRANSPORT_AoIP) {
-		exp_compl := tr_BSSMAP_AssignmentComplete(omit, ?);
+		if (expect_osmux) {
+			exp_compl := tr_BSSMAP_AssignmentComplete(omit, ?, osmux_cid);
+		} else {
+			exp_compl := tr_BSSMAP_AssignmentComplete(omit, ?, omit);
+		}
 	} else {
 		/* CIC is optional "*" as the MSC allocated it */
-		exp_compl := tr_BSSMAP_AssignmentComplete(*, omit);
+		if (expect_osmux) {
+			exp_compl := tr_BSSMAP_AssignmentComplete(*, omit, osmux_cid);
+		} else {
+			exp_compl := tr_BSSMAP_AssignmentComplete(*, omit);
+		}
 	}
 	return exp_compl;
 }
@@ -1002,9 +1043,9 @@
 	IPA_RSL[0].clear;
 
 	/* perform BSSAP RESET, expect RESET ACK and DISC.ind on connection */
-	BSSAP.send(ts_BSSAP_UNITDATA_req(g_bssap.sccp_addr_peer, g_bssap.sccp_addr_own, ts_BSSMAP_Reset(0)));
+	BSSAP.send(ts_BSSAP_UNITDATA_req(g_bssap.sccp_addr_peer, g_bssap.sccp_addr_own, ts_BSSMAP_Reset(0, g_osmux_enabled)));
 	interleave {
-	[] BSSAP.receive(tr_BSSAP_UNITDATA_ind(g_bssap.sccp_addr_own, g_bssap.sccp_addr_peer, tr_BSSMAP_ResetAck)) { }
+	[] BSSAP.receive(tr_BSSAP_UNITDATA_ind(g_bssap.sccp_addr_own, g_bssap.sccp_addr_peer, tr_BSSMAP_ResetAck(g_osmux_enabled))) { }
 	[] BSSAP.receive(tr_BSSAP_DISC_ind(dt.sccp_conn_id, ?, ?)) { }
 	}
 
@@ -1491,9 +1532,9 @@
 	f_pageing_helper('001010123456789'H, cid_list, c_BtsId_all);
 
 	/* Perform a BSSMAP Reset and wait for ACK */
-	BSSAP.send(ts_BSSAP_UNITDATA_req(g_bssap.sccp_addr_peer, g_bssap.sccp_addr_own, ts_BSSMAP_Reset(0)));
+	BSSAP.send(ts_BSSAP_UNITDATA_req(g_bssap.sccp_addr_peer, g_bssap.sccp_addr_own, ts_BSSMAP_Reset(0, g_osmux_enabled)));
 	alt {
-	[] BSSAP.receive(tr_BSSAP_UNITDATA_ind(g_bssap.sccp_addr_own, g_bssap.sccp_addr_peer, tr_BSSMAP_ResetAck)) { }
+	[] BSSAP.receive(tr_BSSAP_UNITDATA_ind(g_bssap.sccp_addr_own, g_bssap.sccp_addr_peer, tr_BSSMAP_ResetAck(g_osmux_enabled))) { }
 	[] BSSAP.receive { repeat; }
 	}
 
@@ -1945,8 +1986,8 @@
 type record of CodecListTest CodecListTests
 
 private function f_TC_assignment_codec(charstring id) runs on MSC_ConnHdlr {
-	var PDU_BSSAP ass_cmd := f_gen_ass_req();
-	var template PDU_BSSAP exp_compl := f_gen_exp_compl();
+	var PDU_BSSAP ass_cmd := f_gen_ass_req(g_pars.use_osmux);
+	var template PDU_BSSAP exp_compl := f_gen_exp_compl(g_pars.use_osmux);
 
 	/* puzzle together the ASSIGNMENT REQ for given codec[s] */
 	if (mp_bssap_cfg.transport == BSSAP_TRANSPORT_AoIP) {
@@ -2568,6 +2609,31 @@
 	setverdict(pass);
 }
 
+testcase TC_assignment_osmux() runs on test_CT {
+	var TestHdlrParams pars := f_gen_test_hdlr_pars();
+	var MSC_ConnHdlr vc_conn;
+
+	/* See note above */
+	var RSL_IE_Body mr_conf := {
+		other := {
+			len := 2,
+			payload := '2804'O
+		}
+	};
+
+	pars.ass_codec_list := valueof(ts_BSSMAP_IE_CodecList({ts_CodecAMR_H}));
+	pars.ass_codec_list.codecElements[0].s0_7 := '00000100'B; /* 5,90k */
+	pars.ass_codec_list.codecElements[0].s8_15 := '00000111'B;
+	pars.expect_mr_conf_ie := mr_conf;
+	pars.use_osmux := true;
+
+	f_init(1, true, true);
+	f_sleep(1.0);
+
+	vc_conn := f_start_handler(refers(f_TC_assignment_codec), pars);
+	vc_conn.done;
+}
+
 /* test the procedure of the MSC requesting a Classmark Update:
  * a) BSSMAP Classmark Request should result in RR CLASSMARK ENQUIRY,
  * b) L3 RR CLASSMARK CHANGE should result in BSSMAP CLASSMARK UPDATE */
@@ -3993,6 +4059,8 @@
 	execute( TC_assignment_codec_req_hr_fr() );
 	execute( TC_assignment_codec_req_fr_hr() );
 
+	execute( TC_assignment_osmux() );
+
 	/* RLL Establish Indication on inactive DCHAN / SAPI */
 	execute( TC_rll_est_ind_inact_lchan() );
 	execute( TC_rll_est_ind_inval_sapi1() );
diff --git a/bsc/MSC_ConnectionHandler.ttcn b/bsc/MSC_ConnectionHandler.ttcn
index 520cc3e..0db5630 100644
--- a/bsc/MSC_ConnectionHandler.ttcn
+++ b/bsc/MSC_ConnectionHandler.ttcn
@@ -263,6 +263,7 @@
  * MGW level media handling */
 altstep as_Media_mgw(boolean norepeat := false) runs on MSC_ConnHdlr {
 	var MgcpCommand mgcp_cmd;
+	var MgcpOsmuxCID osmux_cid;
 
 	[] MGCP.receive(tr_CRCX) -> value mgcp_cmd {
 		var SDP_Message sdp;
@@ -289,7 +290,12 @@
 							int2str(mgcp_conn.sample_rate))),
 				valueof(ts_SDP_ptime(mgcp_conn.ptime)) } ));
 		var template MgcpResponse mgcp_resp;
-		mgcp_resp := ts_CRCX_ACK(mgcp_cmd.line.trans_id, mgcp_conn.conn_id, sdp);
+		if (g_pars.use_osmux and f_MgcpCmd_contains_par(mgcp_cmd, "X-OSMUX")) {
+			osmux_cid := f_MgcpCmd_extract_osmux_cid(mgcp_cmd);
+			mgcp_resp := ts_CRCX_ACK_osmux(mgcp_cmd.line.trans_id, mgcp_conn.conn_id, osmux_cid, sdp);
+		} else {
+			mgcp_resp := ts_CRCX_ACK(mgcp_cmd.line.trans_id, mgcp_conn.conn_id, sdp);
+		}
 		f_mgcp_par_append(mgcp_resp.params, ts_MgcpParSpecEP(g_media.mgcp_ep));
 		MGCP.send(mgcp_resp);
 		g_media.mgcp_conn[cid].crcx_seen := g_media.mgcp_conn[cid].crcx_seen + 1;
@@ -364,8 +370,8 @@
 	var template PDU_BSSAP resp := omit;
 
 	/* answer all RESET with a RESET ACK */
-	if (match(bssap, tr_BSSMAP_Reset)) {
-		resp := ts_BSSMAP_ResetAck;
+	if (match(bssap, tr_BSSMAP_Reset(g_ran_ops.use_osmux))) {
+		resp := ts_BSSMAP_ResetAck(g_ran_ops.use_osmux);
 	}
 
 	return resp;
@@ -377,6 +383,7 @@
 	decode_dtap := false,
 	role_ms := false,
 	protocol := RAN_PROTOCOL_BSSAP,
+	use_osmux := false,
 	sccp_addr_local := omit,
 	sccp_addr_peer := omit
 }
@@ -431,7 +438,8 @@
 	TestHdlrEncrParams encr optional,
 	TestHdlrParamsLcls lcls,
 	TestHdlrParamsHandover handover optional,
-	boolean		aoip
+	boolean		aoip,
+	boolean		use_osmux
 };
 
 /* Note: Do not use valueof() to get a value of this template, use
@@ -455,7 +463,8 @@
 		adjust_cx_exp := true
 	},
 	handover := omit,
-	aoip := true
+	aoip := true,
+	use_osmux := false
 }
 
 function f_create_chan_and_exp() runs on MSC_ConnHdlr {
diff --git a/bsc/expected-results.xml b/bsc/expected-results.xml
index 33bf677..ff3cce0 100644
--- a/bsc/expected-results.xml
+++ b/bsc/expected-results.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0"?>
-<testsuite name='BSC_Tests' tests='105' failures='0' errors='0' skipped='0' inconc='0' time='MASKED'>
+<testsuite name='BSC_Tests' tests='106' failures='0' errors='0' skipped='0' inconc='0' time='MASKED'>
   <testcase classname='BSC_Tests' name='TC_ctrl_msc_connection_status' time='MASKED'/>
   <testcase classname='BSC_Tests' name='TC_ctrl_msc0_connection_status' time='MASKED'/>
   <testcase classname='BSC_Tests' name='TC_ctrl' time='MASKED'/>
@@ -46,6 +46,7 @@
   <testcase classname='BSC_Tests' name='TC_assignment_codec_hr_exhausted_req_fr_hr' time='MASKED'/>
   <testcase classname='BSC_Tests' name='TC_assignment_codec_req_hr_fr' time='MASKED'/>
   <testcase classname='BSC_Tests' name='TC_assignment_codec_req_fr_hr' time='MASKED'/>
+  <testcase classname='BSC_Tests' name='TC_assignment_osmux' time='MASKED'/>
   <testcase classname='BSC_Tests' name='TC_rll_est_ind_inact_lchan' time='MASKED'/>
   <testcase classname='BSC_Tests' name='TC_rll_est_ind_inval_sapi1' time='MASKED'/>
   <testcase classname='BSC_Tests' name='TC_rll_est_ind_inval_sapi3' time='MASKED'/>
diff --git a/library/MGCP_Templates.ttcn b/library/MGCP_Templates.ttcn
index 4cc2c6b..4736aaa 100644
--- a/library/MGCP_Templates.ttcn
+++ b/library/MGCP_Templates.ttcn
@@ -143,6 +143,19 @@
 		sdp := sdp
 	}
 
+	template MgcpResponse ts_CRCX_ACK_osmux(MgcpTransId trans_id, MgcpConnectionId conn_id, MgcpOsmuxCID osmux_cid, template SDP_Message sdp := omit) := {
+		line := {
+			code := "200",
+			trans_id := trans_id,
+			string := "OK"
+		},
+		params:= {
+			ts_MgcpParConnectionId(conn_id),
+			ts_MgcpParOsmuxCID(osmux_cid)
+		},
+		sdp := sdp
+	}
+
 	template MgcpCommand ts_MDCX(MgcpTransId trans_id, charstring ep, MgcpConnectionMode mode, MgcpCallId call_id, MgcpConnectionId conn_id, template SDP_Message sdp := omit) := {
 		line := t_MgcpCmdLine("MDCX", trans_id, ep),
 		params := {
diff --git a/library/RAN_Emulation.ttcnpp b/library/RAN_Emulation.ttcnpp
index 9a65eb7..41aec47 100644
--- a/library/RAN_Emulation.ttcnpp
+++ b/library/RAN_Emulation.ttcnpp
@@ -465,9 +465,9 @@
 
 	T.start;
 	alt {
-	[] BSSAP.receive(tr_BSSAP_UNITDATA_ind(?, ?, tr_BSSMAP_Reset)) -> value ud_ind {
+	[] BSSAP.receive(tr_BSSAP_UNITDATA_ind(?, ?, tr_BSSMAP_Reset(g_ran_ops.use_osmux))) -> value ud_ind {
 		BSSAP.send(ts_BSSAP_UNITDATA_req(ud_ind.callingAddress, ud_ind.calledAddress,
-			   ts_BSSMAP_ResetAck));
+			   ts_BSSMAP_ResetAck(g_ran_ops.use_osmux)));
 		}
 	[] as_reset_ack();
 	[] BSSAP.receive {
@@ -483,10 +483,10 @@
 function f_bssap_reset(SCCP_PAR_Address peer, SCCP_PAR_Address own) runs on RAN_Emulation_CT {
 	timer T := 5.0;
 
-	BSSAP.send(ts_BSSAP_UNITDATA_req(peer, own, ts_BSSMAP_Reset(0)));
+	BSSAP.send(ts_BSSAP_UNITDATA_req(peer, own, ts_BSSMAP_Reset(0, g_ran_ops.use_osmux)));
 	T.start;
 	alt {
-	[] BSSAP.receive(tr_BSSAP_UNITDATA_ind(own, peer, tr_BSSMAP_ResetAck)) {
+	[] BSSAP.receive(tr_BSSAP_UNITDATA_ind(own, peer, tr_BSSMAP_ResetAck(g_ran_ops.use_osmux))) {
 		log("Received RESET-ACK in response to RESET, we're ready to go!");
 		}
 	[] as_reset_ack();
@@ -650,6 +650,7 @@
 	boolean decode_dtap,
 	boolean role_ms,
 	RanProtocol protocol,
+	boolean use_osmux,
 	/* needed for performing BSSMAP RESET */
 	SCCP_PAR_Address sccp_addr_local optional,
 	SCCP_PAR_Address sccp_addr_peer optional
@@ -727,10 +728,10 @@
 	var RANAP_N_UNITDATA_ind rud_ind;
 #endif
 #ifdef RAN_EMULATION_BSSAP
-	[] BSSAP.receive(tr_BSSAP_UNITDATA_ind(?, ?, tr_BSSMAP_Reset)) -> value ud_ind {
+	[] BSSAP.receive(tr_BSSAP_UNITDATA_ind(?, ?, tr_BSSMAP_Reset(g_ran_ops.use_osmux))) -> value ud_ind {
 		log("Respoding to inbound RESET with RESET-ACK");
 		BSSAP.send(ts_BSSAP_UNITDATA_req(ud_ind.callingAddress, ud_ind.calledAddress,
-			   ts_BSSMAP_ResetAck));
+			   ts_BSSMAP_ResetAck(g_ran_ops.use_osmux)));
 		repeat;
 	}
 #endif
diff --git a/msc/BSC_ConnectionHandler.ttcn b/msc/BSC_ConnectionHandler.ttcn
index 796b0ce..29cde36 100644
--- a/msc/BSC_ConnectionHandler.ttcn
+++ b/msc/BSC_ConnectionHandler.ttcn
@@ -209,6 +209,7 @@
 	decode_dtap := true,
 	role_ms := true,
 	protocol := RAN_PROTOCOL_BSSAP,
+	use_osmux := false,
 	sccp_addr_local := omit,
 	sccp_addr_peer := omit
 }

-- 
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Gerrit-Project: osmo-ttcn3-hacks
Gerrit-Branch: master
Gerrit-MessageType: merged
Gerrit-Change-Id: If69c716dc06d61d810c32d1720a237c7535baca8
Gerrit-Change-Number: 14105
Gerrit-PatchSet: 8
Gerrit-Owner: Pau Espin Pedrol <pespin at sysmocom.de>
Gerrit-Reviewer: Harald Welte <laforge at gnumonks.org>
Gerrit-Reviewer: Jenkins Builder (1000002)
Gerrit-Reviewer: Pau Espin Pedrol <pespin at sysmocom.de>
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