msc_tests/MSC_Tests.ttcn

module MSC_Tests {

import from General_Types all;
import from Osmocom_Types all;

import from M3UA_Types all;
import from M3UA_Emulation all;

import from MTP3asp_Types all;
import from MTP3asp_PortType all;

import from SCCPasp_Types all;
import from SCCP_Types all;
import from SCCP_Emulation all;

import from SCTPasp_Types all;
import from SCTPasp_PortType all;

import from Osmocom_CTRL_Functions all;
import from Osmocom_CTRL_Types all;
import from Osmocom_CTRL_Adapter all;

import from TELNETasp_PortType all;
import from Osmocom_VTY_Functions all;

import from MNCC_Emulation all;
import from MNCC_Types all;

import from MGCP_Emulation all;
import from MGCP_Types all;
import from MGCP_Templates all;
import from SDP_Types all;

import from GSUP_Emulation all;
import from GSUP_Types all;
import from IPA_Emulation all;

import from BSSAP_Types all;
import from BSSAP_Adapter all;
import from BSSAP_CodecPort all;
import from BSSMAP_Templates all;
import from BSSMAP_Emulation all;
import from BSC_ConnectionHandler all;

import from MobileL3_Types all;
import from MobileL3_CommonIE_Types all;
import from L3_Templates all;


type component MTC_CT extends BSSAP_Adapter_CT, CTRL_Adapter_CT {
	var boolean g_initialized := false;

	/* no 'adapter_CT' for MNCC or GSUP */
	var MNCC_Emulation_CT vc_MNCC;
	var MGCP_Emulation_CT vc_MGCP;
	var GSUP_Emulation_CT vc_GSUP;
	var IPA_Emulation_CT vc_GSUP_IPA;

	/* only to get events from IPA underneath GSUP */
	port IPA_CTRL_PT GSUP_IPA_EVENT;
	/* VTY to MSC */
	port TELNETasp_PT MSCVTY;
}

modulepar {
	/* remote parameters of IUT */
	charstring mp_msc_ip := "127.0.0.1";
	integer mp_msc_ctrl_port := 4255;
	integer mp_msc_vty_port := 4254;

	/* local parameters of emulated HLR */
	charstring mp_hlr_ip := "127.0.0.1";
	integer mp_hlr_port := 4222;

	charstring mp_msc_mncc := "/tmp/mncc";
}


function f_init_mncc(charstring id) runs on MTC_CT {
	id := id & "-MNCC";
	var MnccOps ops := {
		create_cb := refers(MNCC_Emulation.ExpectedCreateCallback),
		unitdata_cb := refers(MNCC_Emulation.DummyUnitdataCallback)
	}

	vc_MNCC := MNCC_Emulation_CT.create(id);
	map(vc_MNCC:MNCC, system:MNCC_CODEC_PT);
	vc_MNCC.start(MNCC_Emulation.main(ops, id, mp_msc_mncc));
}

function f_init_mgcp(charstring id) runs on MTC_CT {
	id := id & "-MGCP";
	var MGCPOps ops := {
		create_cb := refers(MGCP_Emulation.ExpectedCreateCallback),
		unitdata_cb := refers(MGCP_Emulation.DummyUnitdataCallback)
	}
	var MGCP_conn_parameters pars := {
		callagent_ip := "127.0.0.1",
		callagent_udp_port := -1,
		mgw_ip := "127.0.0.1",
		mgw_udp_port := 2427
	}

	vc_MGCP := MGCP_Emulation_CT.create(id);
	map(vc_MGCP:MGCP, system:MGCP_CODEC_PT);
	vc_MGCP.start(MGCP_Emulation.main(ops, pars, id));
}

function f_init_gsup(charstring id) runs on MTC_CT {
	id := id & "-GSUP";
	var GsupOps ops := {
		create_cb := refers(GSUP_Emulation.ExpectedCreateCallback)
	}

	vc_GSUP_IPA := IPA_Emulation_CT.create(id & "-IPA");
	vc_GSUP := GSUP_Emulation_CT.create(id);

	map(vc_GSUP_IPA:IPA_PORT, system:IPA_CODEC_PT);
	connect(vc_GSUP:GSUP, vc_GSUP_IPA:IPA_GSUP_PORT);
	/* we use this hack to get events like ASP_IPA_EVENT_UP */
	connect(vc_GSUP_IPA:IPA_CTRL_PORT, self:GSUP_IPA_EVENT);

	vc_GSUP.start(GSUP_Emulation.main(ops, id));
	vc_GSUP_IPA.start(IPA_Emulation.main_server(mp_hlr_ip, mp_hlr_port));

	/* wait for incoming connection to GSUP port before proceeding */
	timer T := 10.0;
	T.start;
	alt {
		[] GSUP_IPA_EVENT.receive(t_ASP_IPA_EVT_UD(ASP_IPA_EVENT_UP)) { }
		[] T.timeout {
			setverdict(inconc, "No connection to GSUP Port");
			self.stop
		}
	}
}

function f_init() runs on MTC_CT {

	if (g_initialized == true) {
		return;
	}
	g_initialized := true;

	f_bssap_init("MSC_Test", BSC_BssmapOps);
	f_ipa_ctrl_start(mp_msc_ip, mp_msc_ctrl_port);
	f_init_mncc("MSC_Test");
	f_init_mgcp("MSC_Test");
	f_init_gsup("MSC_Test");

	map(self:MSCVTY, system:MSCVTY);
	f_vty_set_prompts(MSCVTY);
	f_vty_transceive(MSCVTY, "enable");

	/* set some defaults */
	f_vty_config(MSCVTY, "network", "authentication optional");
	f_vty_config(MSCVTY, "msc", "assign-tmsi");
	f_vty_config(MSCVTY, "network", "encryption a5 0");
}

template PDU_BSSAP ts_BSSAP_BSSMAP := {
	discriminator := '0'B,
	spare := '0000000'B,
	dlci := omit,
	lengthIndicator := 0,	/* overwritten by codec */
	pdu := ?
}

template PDU_BSSAP tr_BSSAP_BSSMAP := {
	discriminator := '0'B,
	spare := '0000000'B,
	dlci := omit,
	lengthIndicator := ?,
	pdu := {
		bssmap := ?
	}
}


type integer BssmapCause;

template (value) BSSMAP_IE_Cause ts_BSSMAP_IE_Cause(BssmapCause val) := {
	elementIdentifier := '04'O,
	lengthIndicator := 0,
	causeValue := int2bit(val, 7),
	extensionCauseValue := '0'B,
	spare1 := omit
}

template (value) PDU_BSSAP ts_BSSMAP_Reset(BssmapCause cause) modifies ts_BSSAP_BSSMAP := {
	pdu := {
		bssmap := {
			reset := {
				messageType := '30'O,
				cause := ts_BSSMAP_IE_Cause(cause),
				a_InterfaceSelectorForReset := omit
			}
		}
	}
}

template (value) PDU_BSSAP ts_BSSMAP_ResetAck modifies ts_BSSAP_BSSMAP := {
	pdu := {
		bssmap := {
			resetAck := {
				messageType := '31'O,
				a_InterfaceSelectorForReset := omit
			}
		}
	}
}

template PDU_BSSAP tr_BSSMAP_ResetAck modifies tr_BSSAP_BSSMAP := {
	pdu := {
		bssmap := {
			resetAck := {
				messageType := '31'O,
				a_InterfaceSelectorForReset := *
			}
		}
	}
}

template BSSMAP_IE_CellIdentifier ts_BSSMAP_IE_CellID := {
	elementIdentifier := '05'O,
	lengthIndicator := 0,
	cellIdentifierDiscriminator := '0000'B,
	spare1_4 := '0000'B,
	cellIdentification := ?
}

type uint16_t BssmapLAC;
type uint16_t BssmapCI;

/*
template BSSMAP_IE_CellIdentifier ts_CellId_CGI(mcc, mnc, lac, ci)
modifies ts_BSSMAP_IE_CellID := {
	cellIdentification := {
		cI_LAC_CGI := {
			mnc_mcc := FIXME,
			lac := int2oct(lac, 2),
			ci := int2oct(ci, 2)
		}
	}
}
*/

template BSSMAP_IE_CellIdentifier ts_CellID_LAC_CI(BssmapLAC lac, BssmapCI ci)
modifies ts_BSSMAP_IE_CellID := {
	cellIdentification := {
		cI_LAC_CI := {
			lac := int2oct(lac, 2),
			ci := int2oct(ci, 2)
		}
	}
}

template BSSMAP_IE_CellIdentifier ts_CellId_CI(BssmapCI ci)
modifies ts_BSSMAP_IE_CellID := {
	cellIdentification := {
		cI_CI := int2oct(ci, 2)
	}
}

template BSSMAP_IE_CellIdentifier ts_CellId_none
modifies ts_BSSMAP_IE_CellID := {
	cellIdentification := {
		cI_noCell := ''O
	}
}


template BSSMAP_IE_Layer3Information ts_BSSMAP_IE_L3Info(octetstring l3info) := {
	elementIdentifier := '17'O,
	lengthIndicator := 0,
	layer3info := l3info
}

template PDU_BSSAP ts_BSSMAP_ComplL3(BSSMAP_IE_CellIdentifier cell_id, octetstring l3_info)
modifies ts_BSSAP_BSSMAP := {
	pdu := {
		bssmap := {
			completeLayer3Information := {
				messageType := '57'O,
				cellIdentifier := cell_id,
				layer3Information := ts_BSSMAP_IE_L3Info(l3_info),
				chosenChannel := omit,
				lSAIdentifier := omit,
				aPDU := omit,
				codecList := omit,
				redirectAttemptFlag := omit,
				sendSequenceNumber := omit,
				iMSI := omit
			}
		}
	}
}

template PDU_BSSAP ts_BSSMAP_HandoReq(BssmapCause cause, BSSMAP_IE_CellIdentifierList cid_list)
modifies ts_BSSAP_BSSMAP := {
	pdu := {
		bssmap := {
			handoverRequired := {
				messageType := '11'O,
				cause := ts_BSSMAP_IE_Cause(cause),
				responseRequest := omit,
				cellIdentifierList := cid_list,
				circuitPoolList := omit,
				currentChannelType1 := omit,
				speechVersion := omit,
				queueingIndicator := omit,
				oldToNewBSSInfo := omit,
				sourceToTargetRNCTransparentInfo := omit,
				sourceToTargetRNCTransparentInfoCDMA := omit,
				gERANClassmark := omit,
				talkerPriority := omit,
				speechCodec := omit,
				cSG_Identifier := omit
			}
		}
	}
}

//	enc_PDU_BSSAP

function f_send_BSSAP_UNITDATA(template PDU_BSSAP bssap) runs on MTC_CT {
	BSSAP.send(ts_BSSAP_UNITDATA_req(g_sccp_addr_peer, g_sccp_addr_own, bssap))
}

type function void_fn(charstring id, BSC_ConnHdlrPars pars) runs on BSC_ConnHdlr;

private function f_concat_pad(integer tot_len, hexstring prefix, integer suffix) return hexstring {
	var integer suffix_len := tot_len - lengthof(prefix);
	var charstring suffix_ch := int2str(suffix);
	var integer pad_len := suffix_len - lengthof(suffix_ch);

	return prefix & int2hex(0, pad_len) & str2hex(suffix_ch);
}

function f_gen_imei(integer suffix) return hexstring {
	return f_concat_pad(15, '49999'H, suffix);
}

function f_gen_imsi(integer suffix) return hexstring {
	return f_concat_pad(15, '26242'H, suffix);
}

function f_gen_msisdn(integer suffix) return hexstring {
	return f_concat_pad(12, '49123'H, suffix);
}

/* FIXME: move into BSC_ConnectionHandler? */
function f_start_handler(void_fn fn, charstring id, integer imsi_suffix) runs on MTC_CT return BSC_ConnHdlr {
	var BSC_ConnHdlr vc_conn;
	var BSC_ConnHdlrPars pars := {
		sccp_addr_own := g_sccp_addr_own,
		sccp_addr_peer := g_sccp_addr_peer,
		cell_id := valueof(ts_CellId_CGI('262'H, '042'H, 23, 42)),
		imei := f_gen_imei(imsi_suffix),
		imsi := f_gen_imsi(imsi_suffix),
		msisdn := f_gen_msisdn(imsi_suffix),
		tmsi := omit,
		cm2 := valueof(ts_CM2_default),
		cm3 := omit,
		vec := omit
	};

	vc_conn := BSC_ConnHdlr.create(id);
	/* BSSMAP part / A interface */
	connect(vc_conn:BSSAP, vc_BSSMAP:CLIENT);
	connect(vc_conn:BSSAP_PROC, vc_BSSMAP:PROC);
	/* MNCC part */
	connect(vc_conn:MNCC, vc_MNCC:MNCC_CLIENT);
	connect(vc_conn:MNCC_PROC, vc_MNCC:MNCC_PROC);
	/* MGCP part */
	connect(vc_conn:MGCP, vc_MGCP:MGCP_CLIENT);
	connect(vc_conn:MGCP_PROC, vc_MGCP:MGCP_PROC);
	/* GSUP part */
	connect(vc_conn:GSUP, vc_GSUP:GSUP_CLIENT);
	connect(vc_conn:GSUP_PROC, vc_GSUP:GSUP_PROC);

	/* We cannot use vc_conn.start(f_init_handler(fn, id, pars)); as we cannot have
	 * a stand-alone 'derefers()' call, see https://www.eclipse.org/forums/index.php/t/1091364/ */
	vc_conn.start(derefers(fn)(id, pars));
	return vc_conn;
}

function f_vty_config(TELNETasp_PT pt, charstring config_node, charstring cmd)
{
	/* enter config mode; enter node */
	f_vty_enter_config(pt);
	f_vty_transceive(pt, config_node);
	/* execute command */
	f_vty_transceive(pt, cmd);
	/* leave config mode */
	f_vty_transceive(pt, "end");
}

private function f_tc_lu_imsi_noauth_tmsi(charstring id, BSC_ConnHdlrPars pars) runs on BSC_ConnHdlr {
	f_init_handler(pars);
	f_perform_lu(false, true, true);
}
testcase TC_lu_imsi_noauth_tmsi() runs on MTC_CT {
	var BSC_ConnHdlr vc_conn;
	f_init();

	vc_conn := f_start_handler(refers(f_tc_lu_imsi_noauth_tmsi), testcasename(), 1);
	vc_conn.done;
}

private function f_tc_lu_imsi_noauth_notmsi(charstring id, BSC_ConnHdlrPars pars) runs on BSC_ConnHdlr {
	f_init_handler(pars);
	f_perform_lu(false, false, true);
}
testcase TC_lu_imsi_noauth_notmsi() runs on MTC_CT {
	var BSC_ConnHdlr vc_conn;
	f_init();
	f_vty_config(MSCVTY, "msc", "no assign-tmsi");

	vc_conn := f_start_handler(refers(f_tc_lu_imsi_noauth_notmsi), testcasename(), 2);
	vc_conn.done;
}

/* Do LU by IMSI, refuse it on GSUP and expect LU REJ back to MS */
private function f_tc_lu_imsi_reject(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);

	f_create_gsup_expect(hex2str(g_pars.imsi));
	f_bssap_compl_l3(l3_lu);
	GSUP.receive(tr_GSUP_UL_REQ(g_pars.imsi));
	GSUP.send(ts_GSUP_UL_ERR(g_pars.imsi, 23));
	alt {
		[] BSSAP.receive(tr_PDU_DTAP_MT(tr_ML3_MT_LU_Rej(int2oct(23,1)))) { }
		[] BSSAP.receive(tr_PDU_DTAP_MT(tr_ML3_MT_LU_Acc)) {
			setverdict(fail, "Expecting LU REJ, but got ACCEPT");
			self.stop;
		}
	}
	f_expect_clear();
}
testcase TC_lu_imsi_reject() runs on MTC_CT {
	var BSC_ConnHdlr vc_conn;
	f_init();

	vc_conn := f_start_handler(refers(f_tc_lu_imsi_reject), testcasename(), 3);
	vc_conn.done;
}

/* Do LU by IMSI, timeout on GSUP */
private function f_tc_lu_imsi_timeout_gsup(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);

	f_create_gsup_expect(hex2str(g_pars.imsi));
	f_bssap_compl_l3(l3_lu);
	GSUP.receive(tr_GSUP_UL_REQ(g_pars.imsi));
	/* Normally the HLR would need to respond here, but we decide to force a timeout here */
	alt {
		/* FIXME: Expect specific reject cause */
		[] BSSAP.receive(tr_PDU_DTAP_MT(tr_ML3_MT_LU_Rej)) { }
		[] BSSAP.receive(tr_PDU_DTAP_MT(tr_ML3_MT_LU_Acc)) {
			setverdict(fail, "Expecting LU REJ, but got ACCEPT");
			self.stop;
		}
	}
	f_expect_clear();
}
testcase TC_lu_imsi_timeout_gsup() runs on MTC_CT {
	var BSC_ConnHdlr vc_conn;
	f_init();

	vc_conn := f_start_handler(refers(f_tc_lu_imsi_timeout_gsup), testcasename(), 4);
	vc_conn.done;
}

private function f_tc_lu_imsi_auth_tmsi(charstring id, BSC_ConnHdlrPars pars) runs on BSC_ConnHdlr {
	f_init_handler(pars);
	f_perform_lu(true, true, true);
}
testcase TC_lu_imsi_auth_tmsi() runs on MTC_CT {
	var BSC_ConnHdlr vc_conn;
	f_init();
	f_vty_config(MSCVTY, "network", "authentication required");

	vc_conn := f_start_handler(refers(f_tc_lu_imsi_auth_tmsi), testcasename(), 5);
	vc_conn.done;
}


/* Send CM SERVICE REQ for IMSI that has never performed LU before */
private function f_tc_cmserv_imsi_unknown(charstring id, BSC_ConnHdlrPars pars)
runs on BSC_ConnHdlr {
	f_init_handler(pars);

	var MobileIdentityLV mi := valueof(ts_MI_IMSI_LV(g_pars.imsi));
	var BSSMAP_IE_CellIdentifier cell_id := valueof(ts_CellId_CGI('262'H, '042'H, 23, 42));
	var PDU_ML3_MS_NW l3_info := valueof(ts_CM_SERV_REQ(CM_TYPE_MO_CALL, mi));

	f_create_gsup_expect(hex2str(g_pars.imsi));

	/* Send BSSAP_Conn_Req with COMPL L3 INFO to MSC */
	f_bssap_compl_l3(l3_info);

	timer T := 10.0;
	T.start;
	alt {
	[] BSSAP.receive(tr_PDU_DTAP_MT(tr_CM_SERV_REJ)) { }
	//[] BSSAP.receive(tr_PDU_DTAP_MT(tr_CM_SERV_ACC)) { }
	[] BSSAP.receive { setverdict(fail, "Received unexpected BSSAP"); }
	[] GSUP.receive(tr_GSUP_UL_REQ(g_pars.imsi)) {
		setverdict(fail, "Unexpected GSUP UL REQ");
		}
	[] T.timeout { setverdict(inconc, "Timeout waiting for CM SERV REQ"); }
	}

	f_expect_clear();
}
testcase TC_cmserv_imsi_unknown() runs on MTC_CT {
	var BSC_ConnHdlr vc_conn;
	f_init();
	vc_conn := f_start_handler(refers(f_tc_cmserv_imsi_unknown), testcasename(), 6);
	vc_conn.done;
}

private function f_tc_lu_and_mo_call(charstring id, BSC_ConnHdlrPars pars) runs on BSC_ConnHdlr {
	f_init_handler(pars);
	var CallParameters cpars := valueof(t_CallParams('12345'H, 0));
	cpars.bss_rtp_port := 1110;
	cpars.mgcp_connection_id_bss := '22222'H;
	cpars.mgcp_connection_id_mss := '33333'H;

	f_perform_lu(cpars.expect_auth, true, true);
	f_mo_call(cpars);
}
testcase TC_lu_and_mo_call() runs on MTC_CT {
	var BSC_ConnHdlr vc_conn;
	f_init();

	vc_conn := f_start_handler(refers(f_tc_lu_and_mo_call), testcasename(), 7);
	vc_conn.done;
}

/* Test LU (with authentication enabled), where HLR times out sending SAI response */
private function f_tc_lu_auth_sai_timeout(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_bssap_compl_l3(l3_lu);

	/* Send Early Classmark, just for the fun of it */
	BSSAP.send(ts_BSSMAP_ClassmarkUpd(g_pars.cm2, g_pars.cm3));

	GSUP.receive(tr_GSUP_SAI_REQ(g_pars.imsi));
	/* The HLR would normally return an auth vector here, but we fail to do so. */

	BSSAP.receive(tr_PDU_DTAP_MT(tr_ML3_MT_LU_Rej));
	f_expect_clear();
}
testcase TC_lu_auth_sai_timeout() runs on MTC_CT {
	var BSC_ConnHdlr vc_conn;
	f_init();
	f_vty_config(MSCVTY, "network", "authentication required");

	vc_conn := f_start_handler(refers(f_tc_lu_auth_sai_timeout), testcasename(), 8);
	vc_conn.done;
}

/* Test LU (with authentication enabled), where HLR rejects sending SAI error */
private function f_tc_lu_auth_sai_err(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_bssap_compl_l3(l3_lu);

	/* Send Early Classmark, just for the fun of it */
	BSSAP.send(ts_BSSMAP_ClassmarkUpd(g_pars.cm2, g_pars.cm3));

	GSUP.receive(tr_GSUP_SAI_REQ(g_pars.imsi));
	GSUP.send(ts_GSUP_SAI_ERR(g_pars.imsi, 13));

	BSSAP.receive(tr_PDU_DTAP_MT(tr_ML3_MT_LU_Rej));
	f_expect_clear();
}
testcase TC_lu_auth_sai_err() runs on MTC_CT {
	var BSC_ConnHdlr vc_conn;
	f_init();
	f_vty_config(MSCVTY, "network", "authentication required");

	vc_conn := f_start_handler(refers(f_tc_lu_auth_sai_err), testcasename(), 9);
	vc_conn.done;
}

/* Test LU but BSC will send a clear request in the middle */
private function f_tc_lu_clear_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_bssap_compl_l3(l3_lu);

	/* Send Early Classmark, just for the fun of it */
	BSSAP.send(ts_BSSMAP_ClassmarkUpd(g_pars.cm2, g_pars.cm3));

	f_sleep(1.0);
	/* send clear request in the middle of the LU */
	BSSAP.send(ts_BSSMAP_ClearRequest(0));
	BSSAP.receive(tr_BSSMAP_ClearCommand);
	BSSAP.send(ts_BSSMAP_ClearComplete);
	alt {
	/* See https://osmocom.org/issues/2862 */
	[] BSSAP.receive(tr_BSSMAP_ClearCommand) { repeat; }
	[] BSSAP.receive(BSSAP_Conn_Prim:MSC_CONN_PRIM_DISC_IND) {}
	}
	setverdict(pass);
}
testcase TC_lu_clear_request() runs on MTC_CT {
	var BSC_ConnHdlr vc_conn;
	f_init();

	vc_conn := f_start_handler(refers(f_tc_lu_clear_request), testcasename(), 10);
	vc_conn.done;
}

/* Test LU but BSC will send a clear request in the middle */
private function f_tc_lu_disconnect(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_bssap_compl_l3(l3_lu);

	/* Send Early Classmark, just for the fun of it */
	BSSAP.send(ts_BSSMAP_ClassmarkUpd(g_pars.cm2, g_pars.cm3));

	f_sleep(1.0);
	/* send clear request in the middle of the LU */
	BSSAP.send(BSSAP_Conn_Prim:MSC_CONN_PRIM_DISC_REQ);
	setverdict(pass);
}
testcase TC_lu_disconnect() runs on MTC_CT {
	var BSC_ConnHdlr vc_conn;
	f_init();

	vc_conn := f_start_handler(refers(f_tc_lu_disconnect), testcasename(), 11);
	vc_conn.done;
}


/* Test LU but with illegal mobile identity type = IMEI */
private function f_tc_lu_by_imei(charstring id, BSC_ConnHdlrPars pars) runs on BSC_ConnHdlr {
	f_init_handler(pars);

	var PDU_ML3_MS_NW l3_lu := f_build_lu_imei(g_pars.imei)
	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_bssap_compl_l3(l3_lu);

	/* Send Early Classmark, just for the fun of it */
	BSSAP.send(ts_BSSMAP_ClassmarkUpd(g_pars.cm2, g_pars.cm3));
	/* wait for LU reject, ignore any ID REQ */
	alt {
	[] BSSAP.receive(tr_PDU_DTAP_MT(tr_ML3_MT_LU_Rej)) { }
	[] BSSAP.receive(tr_PDU_DTAP_MT(tr_ML3_MT_MM_ID_Req)) { repeat; }
	}
	/* wait for normal teardown */
	f_expect_clear();
}
testcase TC_lu_by_imei() runs on MTC_CT {
	var BSC_ConnHdlr vc_conn;
	f_init();

	vc_conn := f_start_handler(refers(f_tc_lu_by_imei), testcasename(), 12);
	vc_conn.done;
}

/* Test LU by TMSI with unknown TMSI, expect (and answer) ID REQ. */
private function f_tc_lu_tmsi_noauth_unknown(charstring id, BSC_ConnHdlrPars pars) runs on BSC_ConnHdlr {
	f_init_handler(pars);

	var PDU_ML3_MS_NW l3_lu := f_build_lu_tmsi('01020304'O); /* FIXME: Random */
	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_bssap_compl_l3(l3_lu);

	/* Send Early Classmark, just for the fun of it */
	BSSAP.send(ts_BSSMAP_ClassmarkUpd(g_pars.cm2, g_pars.cm3));

	/* Wait for + respond to ID REQ (IMSI) */
	BSSAP.receive(tr_PDU_DTAP_MT(tr_ML3_MT_MM_ID_Req('001'B)));
	BSSAP.send(ts_PDU_DTAP_MO(ts_ML3_MO_MM_ID_Rsp_IMSI(g_pars.imsi)));

	/* Expect MSC to do UpdateLocation to HLR; respond to it */
	GSUP.receive(tr_GSUP_UL_REQ(g_pars.imsi));
	GSUP.send(ts_GSUP_ISD_REQ(g_pars.imsi, g_pars.msisdn));
	GSUP.receive(tr_GSUP_ISD_RES(g_pars.imsi));
	GSUP.send(ts_GSUP_UL_RES(g_pars.imsi));

	alt {
	[] BSSAP.receive(tr_PDU_DTAP_MT(tr_ML3_MT_LU_Acc)) {
		BSSAP.send(ts_PDU_DTAP_MO(ts_ML3_MO_TmsiRealloc_Cmpl));
		}
	[] BSSAP.receive(tr_PDU_DTAP_MT(tr_ML3_MT_LU_Rej)) {
		setverdict(fail, "Expected LU ACK, but received REJ");
		}
	}

	/* wait for normal teardown */
	f_expect_clear();
}
testcase TC_lu_by_tmsi_noauth_unknown() runs on MTC_CT {
	var BSC_ConnHdlr vc_conn;
	f_init();

	vc_conn := f_start_handler(refers(f_tc_lu_tmsi_noauth_unknown), testcasename(), 13);
	vc_conn.done;
}


/* Test IMSI DETACH (MI=IMSI) */
private function f_tc_imsi_detach_by_imsi(charstring id, BSC_ConnHdlrPars pars) runs on BSC_ConnHdlr {
	f_init_handler(pars);

	var MobileIdentityLV mi := valueof(ts_MI_IMSI_LV(g_pars.imsi));

	/* Send BSSAP_Conn_Req with COMPL L3 INFO to MSC */
	f_bssap_compl_l3(valueof(ts_ML3_MO_MM_IMSI_DET_Ind(mi)));

	/* Send Early Classmark, just for the fun of it? */
	BSSAP.send(ts_BSSMAP_ClassmarkUpd(g_pars.cm2, g_pars.cm3));

	/* wait for normal teardown */
	f_expect_clear();
}
testcase TC_imsi_detach_by_imsi() runs on MTC_CT {
	var BSC_ConnHdlr vc_conn;
	f_init();

	vc_conn := f_start_handler(refers(f_tc_imsi_detach_by_imsi), testcasename(), 14);
	vc_conn.done;
}

/* Test IMSI DETACH (MI=TMSI) */
private function f_tc_imsi_detach_by_tmsi(charstring id, BSC_ConnHdlrPars pars) runs on BSC_ConnHdlr {
	f_init_handler(pars);

	var MobileIdentityLV mi := valueof(ts_MI_TMSI_LV('01020304'O));

	/* Send BSSAP_Conn_Req with COMPL L3 INFO to MSC */
	f_bssap_compl_l3(valueof(ts_ML3_MO_MM_IMSI_DET_Ind(mi)));

	/* Send Early Classmark, just for the fun of it? */
	BSSAP.send(ts_BSSMAP_ClassmarkUpd(g_pars.cm2, g_pars.cm3));

	/* wait for normal teardown */
	f_expect_clear();
}
testcase TC_imsi_detach_by_tmsi() runs on MTC_CT {
	var BSC_ConnHdlr vc_conn;
	f_init();

	vc_conn := f_start_handler(refers(f_tc_imsi_detach_by_tmsi), testcasename(), 15);
	vc_conn.done;
}

/* Test IMSI DETACH (MI=IMEI), which is illegal */
private function f_tc_imsi_detach_by_imei(charstring id, BSC_ConnHdlrPars pars) runs on BSC_ConnHdlr {
	f_init_handler(pars);

	var MobileIdentityLV mi := valueof(ts_MI_IMEI_LV(g_pars.imei));

	/* Send BSSAP_Conn_Req with COMPL L3 INFO to MSC */
	f_bssap_compl_l3(valueof(ts_ML3_MO_MM_IMSI_DET_Ind(mi)));

	/* Send Early Classmark, just for the fun of it? */
	BSSAP.send(ts_BSSMAP_ClassmarkUpd(g_pars.cm2, g_pars.cm3));

	/* wait for normal teardown */
	f_expect_clear();
}
testcase TC_imsi_detach_by_imei() runs on MTC_CT {
	var BSC_ConnHdlr vc_conn;
	f_init();

	vc_conn := f_start_handler(refers(f_tc_imsi_detach_by_imei), testcasename(), 16);
	vc_conn.done;
}


/* helper function for an emergency call. caller passes in mobile identity to use */
private function f_emerg_call(MobileIdentityLV mi) runs on BSC_ConnHdlr {

	var PDU_ML3_MS_NW l3_info := valueof(ts_CM_SERV_REQ(CM_TYPE_EMERG_CALL, mi));
	f_bssap_compl_l3(l3_info);
	BSSAP.receive(tr_PDU_DTAP_MT(tr_CM_SERV_ACC));

	var hexstring called := '112'H;
	var integer tid := 0;
	var MNCC_PDU mncc;
	f_create_mncc_expect(hex2str(called));

	BSSAP.send(ts_PDU_DTAP_MO(ts_ML3_MO_CC_EMERG_SETUP(tid)));
	MNCC.receive(tr_MNCC_SETUP_ind(?, tr_MNCC_number(hex2str(called)))) -> value mncc;
	/* FIXME: extract call_id */

	/* Call Proceeding */
	MNCC.send(ts_MNCC_CALL_PROC_req(mncc.u.signal.callref, ts_MNCC_bcap_voice));
	BSSAP.receive(tr_PDU_DTAP_MT(tr_ML3_MT_CC_CALL_PROC(tid)));

	/* Alerting */
	MNCC.send(ts_MNCC_ALERT_req(mncc.u.signal.callref));
	BSSAP.receive(tr_PDU_DTAP_MT(tr_ML3_MT_CC_ALERTING(tid)));

	/* Answer. This causes TCH assignment in case of "late assignment" */
	//MNCC.send(ts_MNCC_SETUP_COMPL_req(mncc.u.signal.callref));
	MNCC.send(ts_MNCC_SETUP_rsp(mncc.u.signal.callref));

	f_sleep(3.0);

	/* Hangup by "B" side */
	MNCC.send(ts_MNCC_DISC_req(mncc.u.signal.callref, valueof(ts_MNCC_cause(23))));
	BSSAP.receive(tr_PDU_DTAP_MT(tr_ML3_MT_CC_DISC(tid)));

	/* Release of call */
	MNCC.send(ts_MNCC_REL_req(mncc.u.signal.callref, valueof(ts_MNCC_cause(42))));
	BSSAP.receive(tr_PDU_DTAP_MT(tr_ML3_MT_CC_RELEASE(tid)));

	/* clearing of radio channel */
	f_expect_clear();
}

/* establish an emergency call by IMEI, no SIM inserted (and hence no IMSI) */
private function f_tc_emerg_call_imei_reject(charstring id, BSC_ConnHdlrPars pars) runs on BSC_ConnHdlr {
	f_init_handler(pars);

	var MobileIdentityLV mi := valueof(ts_MI_IMEI_LV(g_pars.imei));
	var PDU_ML3_MS_NW l3_info := valueof(ts_CM_SERV_REQ(CM_TYPE_EMERG_CALL, mi));
	f_bssap_compl_l3(l3_info);
	BSSAP.receive(tr_PDU_DTAP_MT(tr_CM_SERV_REJ('05'O)));
	f_expect_clear();
}
testcase TC_emerg_call_imei_reject() runs on MTC_CT {
	var BSC_ConnHdlr vc_conn;
	f_init();

	vc_conn := f_start_handler(refers(f_tc_emerg_call_imei_reject), testcasename(), 17);
	vc_conn.done;
}

/* establish an emergency call by IMSI, SIM inserted (and hence IMSI) */
private function f_tc_emerg_call_imsi(charstring id, BSC_ConnHdlrPars pars) runs on BSC_ConnHdlr {
	f_init_handler(pars);
	/* First perform location update to ensure subscriber is known */
	f_perform_lu(false, true, true);
	/* Then issue emergency call identified by IMSI */
	f_emerg_call(valueof(ts_MI_IMSI_LV(g_pars.imsi)));
}
testcase TC_emerg_call_imsi() runs on MTC_CT {
	var BSC_ConnHdlr vc_conn;
	f_init();

	vc_conn := f_start_handler(refers(f_tc_emerg_call_imsi), testcasename(), 18);
	vc_conn.done;
}

/* CM Service Request for VGCS -> reject */
private function f_tc_cm_serv_req_vgcs_reject(charstring id, BSC_ConnHdlrPars pars) runs on BSC_ConnHdlr {
	f_init_handler(pars);

	/* First perform location update to ensure subscriber is known */
	f_perform_lu(false, true, true);

	var MobileIdentityLV mi := valueof(ts_MI_IMSI_LV(g_pars.imsi));
	var PDU_ML3_MS_NW l3_info := valueof(ts_CM_SERV_REQ(CM_TYPE_VGCS, mi));
	f_bssap_compl_l3(l3_info);
	BSSAP.receive(tr_PDU_DTAP_MT(tr_CM_SERV_REJ(int2oct(32,1))));
	f_expect_clear();
}
testcase TC_cm_serv_req_vgcs_reject() runs on MTC_CT {
	var BSC_ConnHdlr vc_conn;
	f_init();

	vc_conn := f_start_handler(refers(f_tc_cm_serv_req_vgcs_reject), testcasename(), 19);
	vc_conn.done;
}

/* CM Service Request for VBS -> reject */
private function f_tc_cm_serv_req_vbs_reject(charstring id, BSC_ConnHdlrPars pars) runs on BSC_ConnHdlr {
	f_init_handler(pars);

	/* First perform location update to ensure subscriber is known */
	f_perform_lu(false, true, true);

	var MobileIdentityLV mi := valueof(ts_MI_IMSI_LV(g_pars.imsi));
	var PDU_ML3_MS_NW l3_info := valueof(ts_CM_SERV_REQ(CM_TYPE_VBS, mi));
	f_bssap_compl_l3(l3_info);
	BSSAP.receive(tr_PDU_DTAP_MT(tr_CM_SERV_REJ(int2oct(32,1))));
	f_expect_clear();
}
testcase TC_cm_serv_req_vbs_reject() runs on MTC_CT {
	var BSC_ConnHdlr vc_conn;
	f_init();

	vc_conn := f_start_handler(refers(f_tc_cm_serv_req_vbs_reject), testcasename(), 20);
	vc_conn.done;
}

/* CM Service Request for LCS -> reject */
private function f_tc_cm_serv_req_lcs_reject(charstring id, BSC_ConnHdlrPars pars) runs on BSC_ConnHdlr {
	f_init_handler(pars);

	/* First perform location update to ensure subscriber is known */
	f_perform_lu(false, true, true);

	var MobileIdentityLV mi := valueof(ts_MI_IMSI_LV(g_pars.imsi));
	var PDU_ML3_MS_NW l3_info := valueof(ts_CM_SERV_REQ(CM_TYPE_LCS, mi));
	f_bssap_compl_l3(l3_info);
	BSSAP.receive(tr_PDU_DTAP_MT(tr_CM_SERV_REJ(int2oct(32,1))));
	f_expect_clear();
}
testcase TC_cm_serv_req_lcs_reject() runs on MTC_CT {
	var BSC_ConnHdlr vc_conn;
	f_init();

	vc_conn := f_start_handler(refers(f_tc_cm_serv_req_lcs_reject), testcasename(), 21);
	vc_conn.done;
}

/* CM Re-Establishment Request */
private function f_tc_cm_reest_req_reject(charstring id, BSC_ConnHdlrPars pars) runs on BSC_ConnHdlr {
	f_init_handler(pars);

	/* First perform location update to ensure subscriber is known */
	f_perform_lu(false, true, true);

	var MobileIdentityLV mi := valueof(ts_MI_IMSI_LV(g_pars.imsi));
	var PDU_ML3_MS_NW l3_info := valueof(ts_CM_REEST_REQ(0, mi));
	f_bssap_compl_l3(l3_info);
	BSSAP.receive(tr_PDU_DTAP_MT(tr_CM_SERV_REJ(int2oct(32,1))));
	f_expect_clear();
}
testcase TC_cm_reest_req_reject() runs on MTC_CT {
	var BSC_ConnHdlr vc_conn;
	f_init();

	vc_conn := f_start_handler(refers(f_tc_cm_reest_req_reject), testcasename(), 22);
	vc_conn.done;
}

/* Test LU (with authentication enabled), with wrong response from MS */
private function f_tc_lu_auth_2G_fail(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)

	/* 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_bssap_compl_l3(l3_lu);

	/* Send Early Classmark, just for the fun of it */
	BSSAP.send(ts_BSSMAP_ClassmarkUpd(g_pars.cm2, g_pars.cm3));

	var AuthVector vec := f_gen_auth_vec_2g();
	var GSUP_IE auth_tuple := valueof(ts_GSUP_IE_AuthTuple2G(vec.rand, vec.sres, vec.kc));
	GSUP.receive(tr_GSUP_SAI_REQ(g_pars.imsi));
	GSUP.send(ts_GSUP_SAI_RES(g_pars.imsi, auth_tuple));

	BSSAP.receive(tr_PDU_DTAP_MT(tr_ML3_MT_MM_AUTH_REQ(vec.rand)));
	/* Send back wrong auth response */
	BSSAP.send(ts_PDU_DTAP_MO(ts_ML3_MT_MM_AUTH_RESP_2G('00000000'O)));

	/* Expect GSUP AUTH FAIL REP to HLR */
	GSUP.receive(tr_GSUP_AUTH_FAIL_IND(g_pars.imsi));

	/* Expect LU REJECT with Cause == Illegal MS */
	BSSAP.receive(tr_PDU_DTAP_MT(tr_ML3_MT_LU_Rej('03'O)));
	f_expect_clear();
}
testcase TC_lu_auth_2G_fail() runs on MTC_CT {
	var BSC_ConnHdlr vc_conn;
	f_init();
	f_vty_config(MSCVTY, "network", "authentication required");

	vc_conn := f_start_handler(refers(f_tc_lu_auth_2G_fail), testcasename(), 23);
	vc_conn.done;
}

private function f_tc_lu_imsi_auth_tmsi_encr_13_13(charstring id, BSC_ConnHdlrPars pars) runs on BSC_ConnHdlr {
	f_init_handler(pars);
	f_perform_lu(true, true, true, true);
}
testcase TC_lu_imsi_auth_tmsi_encr_13_13() runs on MTC_CT {
	var BSC_ConnHdlr vc_conn;
	f_init();
	f_vty_config(MSCVTY, "network", "authentication required");
	f_vty_config(MSCVTY, "network", "encryption a5 1 3");

	vc_conn := f_start_handler(refers(f_tc_lu_imsi_auth_tmsi_encr_13_13), testcasename(), 24);
	vc_conn.done;
}

/* Test Complete L3 without payload */
private function f_tc_cl3_no_payload(charstring id, BSC_ConnHdlrPars pars) runs on BSC_ConnHdlr {
	f_init_handler(pars);

	/* Send Complete L3 Info with empty L3 frame */
	BSSAP.send(ts_BSSAP_Conn_Req(g_pars.sccp_addr_peer, g_pars.sccp_addr_own,
					valueof(ts_BSSMAP_ComplL3(g_pars.cell_id, ''O))));

	timer T := 5.0;
	T.start;
	alt {
	[] BSSAP.receive(BSSAP_Conn_Prim:MSC_CONN_PRIM_DISC_IND) {}
	/* Expect LU REJECT with Cause == Illegal MS */
	[] BSSAP.receive(tr_BSSMAP_ClearCommand) {
		BSSAP.send(ts_BSSMAP_ClearComplete);
		BSSAP.receive(BSSAP_Conn_Prim:MSC_CONN_PRIM_DISC_IND);
		}
	[] T.timeout {
		setverdict(inconc, "Timeout waiting for ClearCommand or SCCP Release");
		self.stop;
		}
	}
	setverdict(pass);
}
testcase TC_cl3_no_payload() runs on MTC_CT {
	var BSC_ConnHdlr vc_conn;
	f_init();

	vc_conn := f_start_handler(refers(f_tc_cl3_no_payload), testcasename(), 24);
	vc_conn.done;
}

/* Test Complete L3 with random payload */
private function f_tc_cl3_rnd_payload(charstring id, BSC_ConnHdlrPars pars) runs on BSC_ConnHdlr {
	f_init_handler(pars);

	var integer len := float2int(rnd() * 256.0);
	var octetstring payl := f_rnd_octstring(len);

	/* Send Complete L3 Info with empty L3 frame */
	BSSAP.send(ts_BSSAP_Conn_Req(g_pars.sccp_addr_peer, g_pars.sccp_addr_own,
					valueof(ts_BSSMAP_ComplL3(g_pars.cell_id, payl))));

	timer T := 5.0;
	T.start;
	alt {
	/* Immediate disconnect */
	[] BSSAP.receive(BSSAP_Conn_Prim:MSC_CONN_PRIM_DISC_IND) {}
	/* Expect LU REJECT with Cause == Illegal MS */
	[] BSSAP.receive(tr_BSSMAP_ClearCommand) {
		BSSAP.send(ts_BSSMAP_ClearComplete);
		BSSAP.receive(BSSAP_Conn_Prim:MSC_CONN_PRIM_DISC_IND);
		}
	[] BSSAP.receive(tr_PDU_DTAP_MT(?)) { repeat; }
	[] T.timeout {
		setverdict(inconc, "Timeout waiting for ClearCommand or SCCP Release");
		self.stop;
		}
	}
	setverdict(pass);
}
testcase TC_cl3_rnd_payload() runs on MTC_CT {
	var BSC_ConnHdlr vc_conn;
	f_init();

	vc_conn := f_start_handler(refers(f_tc_cl3_rnd_payload), testcasename(), 24);
	vc_conn.done;
}

/* Test Complete L3 with random payload */
private function f_tc_establish_and_nothing(charstring id, BSC_ConnHdlrPars pars) runs on BSC_ConnHdlr {
	f_init_handler(pars);

	f_perform_lu(false, true, true, false);

	f_establish_fully(valueof(ts_MI_IMSI_LV(g_pars.imsi)), false, false);
	f_expect_clear();
}
testcase TC_establish_and_nothing() runs on MTC_CT {
	var BSC_ConnHdlr vc_conn;
	f_init();

	vc_conn := f_start_handler(refers(f_tc_establish_and_nothing), testcasename(), 25);
	vc_conn.done;
}

/* Test MO Call SETUP with no response from MNCC */
private function f_tc_mo_setup_and_nothing(charstring id, BSC_ConnHdlrPars pars) runs on BSC_ConnHdlr {
	f_init_handler(pars);

	var CallParameters cpars := valueof(t_CallParams('12345'H, 0));

	f_perform_lu(false, true, true, false);

	f_establish_fully(valueof(ts_MI_IMSI_LV(g_pars.imsi)), false, false);
	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)));

	f_expect_clear(30.0);
}
testcase TC_mo_setup_and_nothing() runs on MTC_CT {
	var BSC_ConnHdlr vc_conn;
	f_init();

	vc_conn := f_start_handler(refers(f_tc_mo_setup_and_nothing), testcasename(), 26);
	vc_conn.done;
}

/* Test MO Call with no response to RAN-side CRCX */
private function f_tc_mo_crcx_ran_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(false, true, true, false);

	f_establish_fully(valueof(ts_MI_IMSI_LV(g_pars.imsi)), false, false);
	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)));

	MGCP.receive(tr_CRCX) -> value mgcp_cmd;
	cpars.mgcp_call_id := f_MgcpCmd_extract_call_id(mgcp_cmd);
	cpars.mgcp_ep := mgcp_cmd.line.ep;
	/* never respond to this */

	f_expect_clear(30.0);
}
testcase TC_mo_crcx_ran_timeout() runs on MTC_CT {
	var BSC_ConnHdlr vc_conn;
	f_init();

	vc_conn := f_start_handler(refers(f_tc_mo_crcx_ran_timeout), testcasename(), 27);
	vc_conn.done;
}

/* Test MO Call with reject to RAN-side CRCX */
private function f_tc_mo_crcx_ran_reject(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(false, true, true, false);

	f_establish_fully(valueof(ts_MI_IMSI_LV(g_pars.imsi)), false, false);
	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)));

	MGCP.receive(tr_CRCX) -> value mgcp_cmd;
	cpars.mgcp_call_id := f_MgcpCmd_extract_call_id(mgcp_cmd);
	cpars.mgcp_ep := mgcp_cmd.line.ep;
	/* Respond to CRCX with error */
	var MgcpResponse mgcp_rsp := {
		line := {
			code := "542",
			trans_id := mgcp_cmd.line.trans_id,
			string := "FORCED_FAIL"
		},
		params := omit,
		sdp := omit
	}
	MGCP.send(mgcp_rsp);

	timer T := 30.0;
	T.start;
	alt {
	[] T.timeout { setverdict(fail, "Timeout waiting for channel release"); self.stop; }
	[] BSSAP.receive(tr_BSSMAP_ClearCommand) {
		BSSAP.send(ts_BSSMAP_ClearComplete);
		BSSAP.receive(BSSAP_Conn_Prim:MSC_CONN_PRIM_DISC_IND);
		setverdict(pass);
		}
	[] BSSAP.receive { repeat; }
	[] MNCC.receive { repeat; }
	[] GSUP.receive { repeat; }
	[] MGCP.receive(tr_DLCX(?)) -> value mgcp_cmd {
		MGCP.send(ts_DLCX_ACK2(mgcp_cmd.line.trans_id));
		f_create_mgcp_delete_ep(cpars.mgcp_ep);
		repeat;
		}
	[] MGCP.receive { repeat; }
	}
}
testcase TC_mo_crcx_ran_reject() runs on MTC_CT {
	var BSC_ConnHdlr vc_conn;
	f_init();

	vc_conn := f_start_handler(refers(f_tc_mo_crcx_ran_reject), testcasename(), 28);
	vc_conn.done;
}


/* helper function to start a MT call: MNCC SETUP; Paging; DChan est.; DTAP SETUP */
private function f_mt_call_start(inout CallParameters cpars) runs on BSC_ConnHdlr {
	var MNCC_PDU mncc;
	var MgcpCommand mgcp_cmd;
	var OCT4 tmsi;

	f_perform_lu(false, true, true, false);
	if (isvalue(g_pars.tmsi)) {
		tmsi := g_pars.tmsi;
	} else {
		tmsi := 'FFFFFFFF'O;
	}
	f_bssmap_register_imsi(g_pars.imsi, tmsi);

	/* Allocate call reference and send SETUP via MNCC to MSC */
	cpars.mncc_callref := f_rnd_int(2147483648);
	MNCC.send(ts_MNCC_SETUP_req(cpars.mncc_callref, hex2str(g_pars.msisdn),
				    hex2str(cpars.called_party), hex2str(g_pars.imsi)));

	/* MSC->BSC: expect PAGING from MSC */
	BSSAP.receive(tr_BSSMAP_Paging(g_pars.imsi));
	/* MS -> MSC: PAGING RESPONSE */
	f_establish_fully_pag(valueof(ts_MI_IMSI_LV(g_pars.imsi)), false, false);

	f_create_mgcp_expect(ExpectCriteria:{omit,omit,omit});

	/* MSC->MS: SETUP */
	BSSAP.receive(tr_PDU_DTAP_MT(tr_ML3_MT_CC_SETUP(cpars.transaction_id, *, cpars.called_party)));
}

/* Test MT Call */
private function f_tc_mt_crcx_ran_reject(charstring id, BSC_ConnHdlrPars pars) runs on BSC_ConnHdlr {
	f_init_handler(pars);
	var CallParameters cpars := valueof(t_CallParams('123456'H, 0));
	var MNCC_PDU mncc;
	var MgcpCommand mgcp_cmd;

	f_mt_call_start(cpars);

	/* MS->MSC: CALL CONFIRMED */
	BSSAP.send(ts_PDU_DTAP_MO(ts_ML3_MO_CC_CALL_CONF(cpars.transaction_id)));

	MNCC.receive(tr_MNCC_CALL_CONF_ind(cpars.mncc_callref));

	MGCP.receive(tr_CRCX) -> value mgcp_cmd;
	cpars.mgcp_call_id := f_MgcpCmd_extract_call_id(mgcp_cmd);
	cpars.mgcp_ep := mgcp_cmd.line.ep;
	/* Respond to CRCX with error */
	var MgcpResponse mgcp_rsp := {
		line := {
			code := "542",
			trans_id := mgcp_cmd.line.trans_id,
			string := "FORCED_FAIL"
		},
		params := omit,
		sdp := omit
	}
	MGCP.send(mgcp_rsp);

	timer T := 30.0;
	T.start;
	alt {
	[] T.timeout { setverdict(fail, "Timeout waiting for channel release"); self.stop; }
	[] BSSAP.receive(tr_BSSMAP_ClearCommand) {
		BSSAP.send(ts_BSSMAP_ClearComplete);
		BSSAP.receive(BSSAP_Conn_Prim:MSC_CONN_PRIM_DISC_IND);
		setverdict(pass);
		}
	[] BSSAP.receive { repeat; }
	[] MNCC.receive { repeat; }
	[] GSUP.receive { repeat; }
	[] MGCP.receive(tr_DLCX(?)) -> value mgcp_cmd {
		MGCP.send(ts_DLCX_ACK2(mgcp_cmd.line.trans_id));
		f_create_mgcp_delete_ep(cpars.mgcp_ep);
		repeat;
		}
	[] MGCP.receive { repeat; }
	}
}
testcase TC_mt_crcx_ran_reject() runs on MTC_CT {
	var BSC_ConnHdlr vc_conn;
	f_init();

	vc_conn := f_start_handler(refers(f_tc_mt_crcx_ran_reject), testcasename(), 29);
	vc_conn.done;
}


/* Test MT Call T310 timer */
private function f_tc_mt_t310(charstring id, BSC_ConnHdlrPars pars) runs on BSC_ConnHdlr {
	f_init_handler(pars, 200.0);
	var CallParameters cpars := valueof(t_CallParams('123456'H, 0));
	var MNCC_PDU mncc;
	var MgcpCommand mgcp_cmd;

	f_mt_call_start(cpars);

	/* MS->MSC: CALL CONFIRMED */
	BSSAP.send(ts_PDU_DTAP_MO(ts_ML3_MO_CC_CALL_CONF(cpars.transaction_id)));
	MNCC.receive(tr_MNCC_CALL_CONF_ind(cpars.mncc_callref));

	MGCP.receive(tr_CRCX) -> value mgcp_cmd;
	cpars.mgcp_call_id := f_MgcpCmd_extract_call_id(mgcp_cmd);
	cpars.mgcp_ep := mgcp_cmd.line.ep;
	/* FIXME: Respond to CRCX */

	/* old libosmocore T310 default timeout is 180s. so let's wait 190 */
	timer T := 190.0;
	T.start;
	alt {
	[] T.timeout { setverdict(fail, "Timeout waiting for T310"); self.stop; }
	[] 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_DISC(cpars.transaction_id)));
	BSSAP.receive(tr_PDU_DTAP_MT(tr_ML3_MT_CC_RELEASE(cpars.transaction_id)));
	/* FIXME: We're sending this with TIflag 0: allocated by sender, which is wrong */
	BSSAP.send(ts_PDU_DTAP_MO(ts_ML3_MO_CC_REL_COMPL(cpars.transaction_id)));

	alt {
	[] BSSAP.receive(tr_BSSMAP_ClearCommand) {
		BSSAP.send(ts_BSSMAP_ClearComplete);
		BSSAP.receive(BSSAP_Conn_Prim:MSC_CONN_PRIM_DISC_IND);
		setverdict(pass);
		}
	[] MGCP.receive(tr_DLCX(?)) -> value mgcp_cmd {
		MGCP.send(ts_DLCX_ACK2(mgcp_cmd.line.trans_id));
		f_create_mgcp_delete_ep(cpars.mgcp_ep);
		repeat;
		}
	}
}
testcase TC_mt_t310() runs on MTC_CT {
	var BSC_ConnHdlr vc_conn;
	f_init();

	vc_conn := f_start_handler(refers(f_tc_mt_t310), testcasename(), 30);
	vc_conn.done;
}

/* Perform successful LU + MO call, then GSUP LocationCancel. Subscriber must be denied CM SERV */
private function f_tc_gsup_cancel(charstring id, BSC_ConnHdlrPars pars) runs on BSC_ConnHdlr {
	f_init_handler(pars);
	var CallParameters cpars := valueof(t_CallParams('12345'H, 0));
	cpars.bss_rtp_port := 1110;
	cpars.mgcp_connection_id_bss := '22222'H;
	cpars.mgcp_connection_id_mss := '33333'H;

	/* Location Update to make subscriber known */
	f_perform_lu(cpars.expect_auth, true, true);

	/* First MO call should succeed */
	f_mo_call(cpars);

	/* Cancel the subscriber in the VLR */
	GSUP.send(ts_GSUP_CL_REQ(g_pars.imsi, OSMO_GSUP_CANCEL_TYPE_WITHDRAW));
	alt {
	[] GSUP.receive(tr_GSUP_CL_RES(g_pars.imsi)) { }
	[] GSUP.receive(tr_GSUP_CL_ERR(g_pars.imsi)) {
		setverdict(fail, "Received GSUP Location Cancel Error");
		self.stop;
		}
	}

	/* Follow-up transactions should fail */
	var MobileIdentityLV mi := valueof(ts_MI_IMSI_LV(g_pars.imsi));
	var PDU_ML3_MS_NW l3_info := valueof(ts_CM_SERV_REQ(CM_TYPE_MO_CALL, mi));
	f_bssap_compl_l3(l3_info);
	alt {
	[] BSSAP.receive(tr_PDU_DTAP_MT(tr_CM_SERV_REJ)) { }
	[] BSSAP.receive {
		setverdict(fail, "Received unexpected BSSAP instead of CM SERV REJ");
		self.stop;
		}
	}
	setverdict(pass);
}
testcase TC_gsup_cancel() runs on MTC_CT {
	var BSC_ConnHdlr vc_conn;
	f_init();

	vc_conn := f_start_handler(refers(f_tc_gsup_cancel), testcasename(), 31);
	vc_conn.done;
}



/* TODO:
   * continue to send repeated MO signalling messages to keep channel open: does MSC tmeout?
   * malformed messages (missing IE, invalid message type): properly rejected?
   * MT call while LU or is ongoing: Do we use existing lchan or page while lchan active?
   * 3G/2G auth permutations
   * encryption algorithms vs. classmark vs. vty config
   * send new transaction after/during clear (like SMS, ...)
   * too long L3 INFO in DTAP
   * too long / padded BSSAP
   * too long / short TLV values
 */


control {
	execute( TC_lu_imsi_noauth_tmsi() );
	execute( TC_lu_imsi_noauth_notmsi() );
	execute( TC_lu_imsi_reject() );
	execute( TC_lu_imsi_timeout_gsup() );
	execute( TC_lu_imsi_auth_tmsi() );
	execute( TC_cmserv_imsi_unknown() );
	execute( TC_lu_and_mo_call() );
	execute( TC_lu_auth_sai_timeout() );
	execute( TC_lu_auth_sai_err() );
	execute( TC_lu_clear_request() );
	execute( TC_lu_disconnect() );
	execute( TC_lu_by_imei() );
	execute( TC_lu_by_tmsi_noauth_unknown() );
	execute( TC_imsi_detach_by_imsi() );
	execute( TC_imsi_detach_by_tmsi() );
	execute( TC_imsi_detach_by_imei() );
	execute( TC_emerg_call_imei_reject() );
	execute( TC_emerg_call_imsi() );
	execute( TC_cm_serv_req_vgcs_reject() );
	execute( TC_cm_serv_req_vbs_reject() );
	execute( TC_cm_serv_req_lcs_reject() );
	execute( TC_cm_reest_req_reject() );
	execute( TC_lu_auth_2G_fail() );
	execute( TC_lu_imsi_auth_tmsi_encr_13_13() );
	execute( TC_cl3_no_payload() );
	execute( TC_cl3_rnd_payload() );
	execute( TC_establish_and_nothing() );
	execute( TC_mo_setup_and_nothing() );
	execute( TC_mo_crcx_ran_timeout() );
	execute( TC_mo_crcx_ran_reject() );
	execute( TC_mt_crcx_ran_reject() );
	execute( TC_mt_t310() );
	execute( TC_gsup_cancel() );
}


}