module BTS_Tests {

import from General_Types all;
import from GSM_Types all;
import from GSM_RR_Types all;
import from Osmocom_Types all;
import from GSM_Types all;
import from GSM_RR_Types all;
import from L1CTL_PortType all;
import from L1CTL_Types all;
import from LAPDm_Types all;
import from Osmocom_CTRL_Adapter all;

import from RSL_Types all;
import from IPA_Emulation all;
import from RSL_Emulation all;

import from IPL4asp_Types all;
import from TRXC_Types all;
import from TRXC_CodecPort all;
import from TRXC_CodecPort_CtrlFunct all;

/* The tests assume a BTS with the following timeslot configuration:
 * TS0 : Combined CCCH + SDCCH/4
 * TS1 .. TS 4: TCH/F
 * TS5 : TCH/H
 * TS6 : SDCCH/8
 * TS7 : PDCH
 */

modulepar {
	charstring mp_rsl_ip := "127.0.0.2";
	integer mp_rsl_port := 3003;
	integer mp_trx0_arfcn := 871;
	integer mp_bb_trxc_port := 5704;
}

type component test_CT extends CTRL_Adapter_CT {
	var IPA_Emulation_CT vc_IPA;

	var RSL_Emulation_CT vc_RSL;
	port RSL_CCHAN_PT RSL_CCHAN;
}

/* an individual call / channel */
type component ConnHdlr extends RSL_DchanHdlr {
	port L1CTL_PT L1CTL;

	port TRXC_CODEC_PT BB_TRXC;
	var integer g_bb_trxc_conn_id;

	timer g_Tguard;
	timer g_Tmeas_exp := 2.0; /* >= 103 SACCH multiframe ~ 500ms */

	var ConnHdlrPars g_pars;
	var uint8_t g_next_meas_res_nr := 0;
}

function f_init_rsl(charstring id) runs on test_CT {
	vc_IPA := IPA_Emulation_CT.create(id & "-RSL-IPA");
	vc_RSL := RSL_Emulation_CT.create(id & "-RSL");

	map(vc_IPA:IPA_PORT, system:IPA_CODEC_PT);
	connect(vc_IPA:IPA_RSL_PORT, vc_RSL:IPA_PT);
	connect(self:RSL_CCHAN, vc_RSL:CCHAN_PT);

	vc_IPA.start(IPA_Emulation.main_server(mp_rsl_ip, mp_rsl_port));
	vc_RSL.start(RSL_Emulation.main(false));
}

type record ConnHdlrPars {
	RslChannelNr chan_nr,
	RSL_IE_ChannelMode chan_mode,
	float t_guard,
	ConnL1Pars l1_pars
}


/* global init function */
function f_init(charstring id) runs on test_CT {
	f_init_rsl(id);
	RSL_CCHAN.receive(ASP_IPA_Event:{up_down := ASP_IPA_EVENT_UP});
}

type function void_fn(charstring id) runs on ConnHdlr;

/* create a new test component */
function f_start_handler(void_fn fn, ConnHdlrPars pars)
runs on test_CT return ConnHdlr {
	var charstring id := testcasename();
	var ConnHdlr vc_conn;

	vc_conn := ConnHdlr.create(id);
	/* connect to RSL Emulation main component */
	connect(vc_conn:RSL, vc_RSL:CLIENT_PT);
	connect(vc_conn:RSL_PROC, vc_RSL:RSL_PROC);

	vc_conn.start(f_handler_init(fn, id, pars));
	return vc_conn;
}

private altstep as_Tguard() runs on ConnHdlr {
	[] g_Tguard.timeout {
		setverdict(fail, "Tguard timeout");
		self.stop;
	}
}

private function f_l1_tune() runs on ConnHdlr {
	/* tune our virtual L1 to the right ARFCN */
	//var BCCH_tune_req tune_req := { arfcn := { false, mp_trx0_arfcn }, combined_ccch := true };
	//L1.send(tune_req);
	f_L1CTL_FBSB(L1CTL, { false, mp_trx0_arfcn }, CCCH_MODE_COMBINED);
}

private function f_trxc_connect() runs on ConnHdlr {
	map(self:BB_TRXC, system:BB_TRXC);
	var Result res;
	res := TRXC_CodecPort_CtrlFunct.f_IPL4_connect(BB_TRXC, "127.0.0.1", mp_bb_trxc_port,
							"127.0.0.1", 0, -1, {udp:={}}, {});
	g_bb_trxc_conn_id := res.connId;
}

private function f_trxc_fake_rssi(uint8_t rssi) runs on ConnHdlr {
	BB_TRXC.send(ts_TRXC_Send(g_bb_trxc_conn_id, ts_TRXC_FAKE_RSSI(rssi))); 
}

private function f_trx_fake_toffs256(int16_t toffs256) runs on ConnHdlr {
	BB_TRXC.send(ts_TRXC_Send(g_bb_trxc_conn_id, ts_TRXC_FAKE_TIMING(toffs256))); 
}

/* first function started in ConnHdlr component */
private function f_handler_init(void_fn fn, charstring id, ConnHdlrPars pars)
runs on ConnHdlr {
	g_pars := pars;
	g_chan_nr := pars.chan_nr;

	map(self:L1CTL, system:L1CTL);
	f_connect_reset(L1CTL);

	f_trxc_connect();

	g_Tguard.start(pars.t_guard);
	activate(as_Tguard());

	f_rslem_register(0, pars.chan_nr);

	/* call the user-supplied test case function */
	fn.apply(id);
}


function f_rsl_chan_act(RSL_IE_ChannelMode mode) runs on ConnHdlr {
	RSL.send(ts_RSL_CHAN_ACT(g_chan_nr, mode));
	alt {
	[] RSL.receive(tr_RSL_CHAN_ACT_ACK(g_chan_nr)) {
		g_Tmeas_exp.start;
		}
	[] RSL.receive(tr_RSL_CHAN_ACT_NACK(g_chan_nr)) {
		setverdict(fail, "Unexpected RF CHAN ACT NACK");
		}
	}
}

function f_rsl_chan_deact() runs on ConnHdlr {
	timer T := 3.0;
	RSL.send(ts_RSL_RF_CHAN_REL(g_chan_nr));
	T.start;
	alt {
	[] RSL.receive(tr_RSL_RF_CHAN_REL_ACK(g_chan_nr)) {
		g_Tmeas_exp.stop;
		}
	[] T.timeout {
		setverdict(fail, "Timeout waiting for RF CHAN REL ACK");
		}
	}
}


private template ConnHdlrPars t_Pars(template RslChannelNr chan_nr,
					template RSL_IE_ChannelMode chan_mode,
					float t_guard := 20.0) := {
	chan_nr := valueof(chan_nr),
	chan_mode := valueof(chan_mode),
	t_guard := t_guard,
	l1_pars := {
		dtx_enabled := false,
		meas_ul := {
			full := {
				rxlev := dbm2rxlev(-53),
				rxqual := 0
			},
			sub := {
				rxlev := dbm2rxlev(-53),
				rxqual := 0
			}
		},
		timing_offset_256syms := 0,
		bs_power_level := 0,
		ms_power_level := 0,
		ms_actual_ta := 0
	}
}

/* Stress test: Do 500 channel activations/deactivations in rapid succession */
function f_TC_chan_act_stress(charstring id) runs on ConnHdlr {
	for (var integer i := 0; i < 500; i := i+1) {
		f_rsl_chan_act(g_pars.chan_mode);
		f_rsl_chan_deact();
	}
	setverdict(pass);
}
testcase TC_chan_act_stress() runs on test_CT {
	var ConnHdlr vc_conn;
	var ConnHdlrPars pars := valueof(t_Pars(t_RslChanNr_Bm(1), ts_RSL_ChanMode_SIGN));
	f_init(testcasename());
	vc_conn := f_start_handler(refers(f_TC_chan_act_stress), pars);
	vc_conn.done;
}

/* Test if re-activation of an already active channel fails as expected */
function f_TC_chan_act_react(charstring id) runs on ConnHdlr {
	f_rsl_chan_act(g_pars.chan_mode);
	/* attempt to activate the same lchan again -> expect reject */
	RSL.send(ts_RSL_CHAN_ACT(g_chan_nr, g_pars.chan_mode));
	alt {
	[] RSL.receive(tr_RSL_CHAN_ACT_ACK(g_chan_nr)) {
		setverdict(fail, "Unexpected CHAN ACT ACK on double activation");
		}
	[] RSL.receive(tr_RSL_CHAN_ACT_NACK(g_chan_nr)) {
		setverdict(pass);
		}
	}
	f_rsl_chan_deact();
}
testcase TC_chan_act_react() runs on test_CT {
	var ConnHdlr vc_conn;
	var ConnHdlrPars pars := valueof(t_Pars(t_RslChanNr_Bm(1), ts_RSL_ChanMode_SIGN));
	f_init(testcasename());
	vc_conn := f_start_handler(refers(f_TC_chan_act_react), pars);
	vc_conn.done;
}

/* Attempt to de-activate a channel that's not active */
function f_TC_chan_deact_not_active(charstring id) runs on ConnHdlr {
	timer T := 3.0;
	RSL.send(ts_RSL_RF_CHAN_REL(g_chan_nr));
	T.start;
	alt {
	[] RSL.receive(tr_RSL_RF_CHAN_REL_ACK(g_chan_nr)) {
		setverdict(pass);
		}
	[] T.timeout {
		setverdict(fail, "Timeout expecting RF_CHAN_REL_ACK");
		}
	}
}
testcase TC_chan_deact_not_active() runs on test_CT {
	var ConnHdlrPars pars := valueof(t_Pars(t_RslChanNr_Bm(1), ts_RSL_ChanMode_SIGN));
	f_init(testcasename());
	var ConnHdlr vc_conn := f_start_handler(refers(f_TC_chan_deact_not_active), pars);
	vc_conn.done;
}

/* attempt to activate channel with wrong RSL Channel Nr IE; expect NACK */
function f_TC_chan_act_wrong_nr(charstring id) runs on ConnHdlr {
	RSL.send(ts_RSL_CHAN_ACT(g_chan_nr, g_pars.chan_mode));
	alt {
	[] RSL.receive(tr_RSL_CHAN_ACT_ACK(g_chan_nr)) {
		setverdict(fail, "Unexpected CHAN ACT ACK");
		}
	[] RSL.receive(tr_RSL_CHAN_ACT_NACK(g_chan_nr)) {
		setverdict(pass);
		}
	}
}
private type record WrongChanNrCase {
	RslChannelNr	chan_nr,
	charstring	description
}
private type record of WrongChanNrCase WrongChanNrCases;
private template WrongChanNrCase t_WCN(template RslChannelNr chan_nr, charstring desc) := {
	chan_nr := chan_nr,
	description := desc
}

testcase TC_chan_act_wrong_nr() runs on test_CT {
	var ConnHdlr vc_conn;
	var ConnHdlrPars pars;

	f_init(testcasename());

	var WrongChanNrCases wrong := {
		valueof(t_WCN(t_RslChanNr_RACH(0), "RACH is not a dedicated channel")),
		valueof(t_WCN(t_RslChanNr_RACH(1), "RACH doesn't exist on timeslot")),
		valueof(t_WCN(t_RslChanNr_BCCH(0), "BCCH is not a dedicated channel")),
		valueof(t_WCN(t_RslChanNr_PCH_AGCH(0), "PCH/AGCH is not a dedicated channel")),
		valueof(t_WCN(t_RslChanNr_Bm(0), "TS0 cannot be TCH/F")),
		valueof(t_WCN(t_RslChanNr_Lm(0, 0), "TS0 cannot be TCH/H")),
		valueof(t_WCN(t_RslChanNr_Lm(0, 1), "TS0 cannot be TCH/H")),
		valueof(t_WCN(t_RslChanNr_PDCH(0), "TS0 cannot be PDCH")),
		valueof(t_WCN(t_RslChanNr_SDCCH8(0, 0), "TS0 cannot be SDCCH/8")),
		valueof(t_WCN(t_RslChanNr_SDCCH8(0, 7), "TS0 cannot be SDCCH/8")),
		valueof(t_WCN(t_RslChanNr_SDCCH4(7, 0), "TS7 cannot be SDCCH/4")),
		valueof(t_WCN(t_RslChanNr_SDCCH4(7, 3), "TS7 cannot be SDCCH/4")),
		valueof(t_WCN(t_RslChanNr_Lm(1, 0), "TS1 cannot be TCH/H"))
	};

	for (var integer i := 0; i < sizeof(wrong); i := i+1) {
		pars := valueof(t_Pars(wrong[i].chan_nr, ts_RSL_ChanMode_SIGN));
		vc_conn := f_start_handler(refers(f_TC_chan_act_wrong_nr), pars);
		vc_conn.done;
	}
}

function f_TC_chan_req(charstring id) runs on ConnHdlr {
	f_l1_tune();

	RSL.clear;
	//L1.send(DCCH_establish_req:{ra := 23});
	/* This arrives on CCHAN, so we cannot test here */
	//RSL.receive(tr_RSL_CHAN_RQD(int2oct(23,1)));
}
testcase TC_chan_req() runs on test_CT {
	var ConnHdlr vc_conn;
	var ConnHdlrPars pars := valueof(t_Pars(t_RslChanNr_Bm(1), ts_RSL_ChanMode_SIGN));
	f_init(testcasename());
	vc_conn := f_start_handler(refers(f_TC_chan_req), pars);
	vc_conn.done;
}

template LapdmAddressField ts_LapdmAddr(LapdmSapi sapi, boolean c_r) := {
	spare := '0'B,
	lpd := 0,
	sapi := sapi,
	c_r := c_r,
	ea := true
}

template LapdmFrameB ts_LAPDm_B(LapdmSapi sapi, boolean c_r, boolean p, octetstring pl) := {
	addr := ts_LapdmAddr(sapi, c_r),
	ctrl := t_LapdmCtrlUI(p),
	len := 0, /* overwritten */
	m := false,
	el := 1,
	payload := pl
}

/* handle incoming downlink SACCH and respond with uplink SACCH (meas res) */
altstep as_l1_sacch() runs on ConnHdlr {
	var L1ctlDlMessage l1_dl;
	[] L1CTL.receive(t_L1CTL_DATA_IND(g_chan_nr, tr_RslLinkID_SACCH(?))) -> value l1_dl {
		log("SACCH received: ", l1_dl.payload.data_ind.payload);
		var GsmRrL3Message meas_rep := valueof(ts_MEAS_REP(true, 23, 23, 0, 0, omit));
		var LapdmFrameB lb := valueof(ts_LAPDm_B(0, false, false, enc_GsmRrL3Message(meas_rep)));
		log("LAPDm: ", lb);
		var octetstring pl := '0000'O & enc_LapdmFrameB(lb);
		L1CTL.send(t_L1CTL_DATA_REQ(g_chan_nr, ts_RslLinkID_SACCH(0), pl));
		repeat;
		}
}

altstep as_l1_dcch() runs on ConnHdlr {
	var L1ctlDlMessage l1_dl;
	[] L1CTL.receive(t_L1CTL_DATA_IND(g_chan_nr, tr_RslLinkID_DCCH(?))) -> value l1_dl {
		log("DCCH received: ", l1_dl.payload.data_ind.payload);
		var octetstring pl := '010301'O;
		L1CTL.send(t_L1CTL_DATA_REQ(g_chan_nr, ts_RslLinkID_DCCH(0), pl));
		repeat;
		}
}

type record MeasElem {
	uint6_t rxlev,
	uint3_t rxqual
}

type record MeasElemFS {
	MeasElem full,
	MeasElem sub
}

type record ConnL1Pars {
	boolean dtx_enabled,
	MeasElemFS meas_ul,
	int16_t timing_offset_256syms,
	uint5_t bs_power_level,
	uint5_t ms_power_level,
	uint8_t ms_actual_ta
}

/* Convert tiing offset from 1/256th symbol to RSL Timing Offset */
private function toffs256s_to_rsl(int16_t toffs256s) return uint8_t {
	return 63 + (toffs256s/256);
}

/* build a template for matching measurement results against */
private function f_build_meas_res_tmpl() runs on ConnHdlr return template RSL_Message {
	var ConnL1Pars l1p := g_pars.l1_pars;
	var template RSL_IE_UplinkMeas ul_meas := {
		len := 3,
		rfu := '0'B,
		dtx_d := l1p.dtx_enabled,
		rxlev_f_u := l1p.meas_ul.full.rxlev,
		reserved1 := '00'B,
		rxlev_s_u := l1p.meas_ul.sub.rxlev,
		reserved2 := '00'B,
		rxq_f_u := l1p.meas_ul.full.rxqual,
		rxq_s_u := l1p.meas_ul.sub.rxqual,
		supp_meas_info := omit
	};
	/* HACK HACK HACK FIXME HACK HACK HACK see https://osmocom.org/issues/2988 */
	ul_meas.rxlev_f_u := ?;
	ul_meas.rxlev_s_u := ?;
	ul_meas.rxq_f_u := ?;
	ul_meas.rxq_s_u := ?;
	var template RSL_IE_BS_Power bs_power := {
		reserved := 0,
		epc := false,
		fpc := false,
		power_level := l1p.bs_power_level
	};
	var template RSL_IE_L1Info l1_info := {
		ms_power_lvl := l1p.ms_power_level,
		fpc := false,
		reserved := 0,
		actual_ta := l1p.ms_actual_ta
	};
	var uint8_t offs := toffs256s_to_rsl(l1p.timing_offset_256syms);
	var template uint8_t t_toffs := (offs-1 .. offs+1);	 /* some tolerance */
	return tr_RSL_MEAS_RES_OSMO(g_chan_nr, g_next_meas_res_nr, ul_meas, bs_power, l1_info,
				    ?, t_toffs);
}

/* verify we regularly receive measurement reports with incrementing numbers */
altstep as_meas_res() runs on ConnHdlr {
	var RSL_Message rsl;
	[] RSL.receive(f_build_meas_res_tmpl()) -> value rsl {
		/* increment counter of next to-be-expected meas rep */
		g_next_meas_res_nr := (g_next_meas_res_nr + 1) mod 256;
		/* Re-start the timer expecting the next MEAS RES */
		g_Tmeas_exp.start;
		repeat;
		}
	[] RSL.receive(tr_RSL_MEAS_RES(g_chan_nr, g_next_meas_res_nr)) -> value rsl {
		setverdict(fail, "Received unspecific MEAS RES ", rsl);
		self.stop;
		}
	[] RSL.receive(tr_RSL_MEAS_RES(?)) -> value rsl {
		setverdict(fail, "Received unexpected MEAS RES ", rsl);
		self.stop;
		}
	[] g_Tmeas_exp.timeout {
		setverdict(fail, "Didn't receive expected measurement result")
		self.stop;
		}
}

/* Establish dedicated channel: L1CTL + RSL side */
private function f_est_dchan() runs on ConnHdlr {
	var GsmFrameNumber fn;
	var ImmediateAssignment imm_ass;
	var integer ra := 23;

	fn := f_L1CTL_RACH(L1CTL, ra);
	/* This arrives on CCHAN, so we cannot test for receiving CHAN RQDhere */
	//RSL.receive(tr_RSL_CHAN_RQD(int2oct(23,1)));

	/* Activate channel on BTS side */
	f_rsl_chan_act(g_pars.chan_mode);

	/* Send IMM.ASS via CCHAN */
	var ChannelDescription ch_desc := {
		chan_nr := g_pars.chan_nr,
		tsc := 7,
		h := false,
		arfcn := mp_trx0_arfcn,
		maio_hsn := omit
	};
	var MobileAllocation ma := {
		len := 0,
		ma := ''B
	};
	var GsmRrMessage rr_msg := valueof(ts_IMM_ASS(ra, fn, 0, ch_desc, ma));
	RSL.send(ts_RSL_IMM_ASSIGN(enc_GsmRrMessage(rr_msg)));

	/* receive IMM.ASS on MS side */
	var ImmediateAssignment ia_um;
	ia_um := f_L1CTL_WAIT_IMM_ASS(L1CTL, ra, fn);
	/* enable dedicated mode */
	f_L1CTL_DM_EST_REQ_IA(L1CTL, ia_um);
}

/* establish DChan, verify existance + contents of measurement reports */
function f_TC_meas_res_periodic(charstring id) runs on ConnHdlr {
	f_l1_tune();
	RSL.clear;

	g_pars.l1_pars.meas_ul.full.rxlev := dbm2rxlev(-100);
	g_pars.l1_pars.meas_ul.sub.rxlev := g_pars.l1_pars.meas_ul.full.rxlev;
	f_trxc_fake_rssi(100);

	g_pars.l1_pars.timing_offset_256syms := 512; /* 2 symbols */
	f_trx_fake_toffs256(g_pars.l1_pars.timing_offset_256syms);

	f_est_dchan();

	/* run for a number of seconds, send SACCH + FACCH from MS side and verify
	 * RSL measurement reports on Abis side */
	timer T := 8.0;
	T.start;
	alt {
	[] as_l1_sacch();
	[] as_meas_res();
	[] as_l1_dcch();
	[] L1CTL.receive { repeat; }
	[g_Tmeas_exp.running] T.timeout {
		/* as_meas_res() would have done setverdict(fail) / self.stop in case
		 * of any earlier errors, so if we reach this timeout, we're good */
		setverdict(pass);
		}
	[] T.timeout {
		setverdict(fail, "No MEAS RES received at all");
		}
	}
	f_rsl_chan_deact();
}
testcase TC_meas_res_sign_tchf() runs on test_CT {
	var ConnHdlr vc_conn;
	var ConnHdlrPars pars;
	f_init(testcasename());
	for (var integer tn := 1; tn <= 4; tn := tn+1) {
		pars := valueof(t_Pars(t_RslChanNr_Bm(tn), ts_RSL_ChanMode_SIGN));
		vc_conn := f_start_handler(refers(f_TC_meas_res_periodic), pars);
		vc_conn.done;
	}
}
testcase TC_meas_res_sign_tchh() runs on test_CT {
	var ConnHdlr vc_conn;
	var ConnHdlrPars pars;
	f_init(testcasename());
	for (var integer ss := 0; ss <= 1; ss := ss+1) {
		pars := valueof(t_Pars(t_RslChanNr_Lm(5, ss), ts_RSL_ChanMode_SIGN));
		vc_conn := f_start_handler(refers(f_TC_meas_res_periodic), pars);
		vc_conn.done;
	}
}
testcase TC_meas_res_sign_sdcch4() runs on test_CT {
	var ConnHdlr vc_conn;
	var ConnHdlrPars pars;
	f_init(testcasename());
	for (var integer ss := 0; ss <= 3; ss := ss+1) {
		pars := valueof(t_Pars(t_RslChanNr_SDCCH4(0, ss), ts_RSL_ChanMode_SIGN));
		vc_conn := f_start_handler(refers(f_TC_meas_res_periodic), pars);
		vc_conn.done;
	}
}
testcase TC_meas_res_sign_sdcch8() runs on test_CT {
	var ConnHdlr vc_conn;
	var ConnHdlrPars pars;
	f_init(testcasename());
	for (var integer ss := 0; ss <= 7; ss := ss+1) {
		pars := valueof(t_Pars(t_RslChanNr_SDCCH8(6, ss), ts_RSL_ChanMode_SIGN));
		vc_conn := f_start_handler(refers(f_TC_meas_res_periodic), pars);
		vc_conn.done;
	}
}

/* Test if a channel without valid uplink bursts generates RSL CONN FAIL IND */
private function f_TC_conn_fail_crit(charstring id) runs on ConnHdlr {
	f_l1_tune();
	RSL.clear;

	f_est_dchan();
	f_sleep(2.0);
	L1CTL.send(t_L1CTL_DM_REL_REQ(g_chan_nr));

	timer T := 40.0;
	T.start;
	alt {
	[] RSL.receive(tr_RSL_CONN_FAIL_IND(g_chan_nr, ?)) {
		setverdict(pass)
		}
	[] RSL.receive { repeat };
	[] T.timeout {
		setverdict(fail, "No CONN FAIL IND received");
		}
	}
	f_rsl_chan_deact();
}
testcase TC_conn_fail_crit() runs on test_CT {
	var ConnHdlr vc_conn;
	var ConnHdlrPars pars;
	f_init(testcasename());
	pars := valueof(t_Pars(t_RslChanNr_SDCCH8(6, 3), ts_RSL_ChanMode_SIGN));
	pars.t_guard := 60.0;
	vc_conn := f_start_handler(refers(f_TC_conn_fail_crit), pars);
	vc_conn.done;
}


control {
	execute( TC_chan_act_stress() );
	execute( TC_chan_act_react() );
	execute( TC_chan_deact_not_active() );
	execute( TC_chan_act_wrong_nr() );
	execute( TC_chan_req() );
	execute( TC_meas_res_sign_tchf() );
	execute( TC_meas_res_sign_tchh() );
	execute( TC_meas_res_sign_sdcch4() );
	execute( TC_meas_res_sign_sdcch8() );
	execute( TC_conn_fail_crit() );
}


}