bts/BTS_Tests_ASCI.ttcn

module BTS_Tests_ASCI {

/* ASCI Integration Tests for OsmoBTS
 *
 * (C) 2023 by sysmocom - s.f.m.c. GmbH <info@sysmocom.de>
 * All Rights Reserved
 *
 * SPDX-License-Identifier: AGPL-3.0+
 *
 * Authors: Harald Welte; Andreas Eversberg
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation; either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

import from Misc_Helpers all;
import from General_Types all;
import from Osmocom_Types all;
import from GSM_Types all;
import from L1CTL_PortType all;
import from L1CTL_Types all;
import from LAPDm_Types all;
import from IPA_Emulation all;
import from GSM_RR_Types all;
import from L3_Templates all;

import from MobileL3_CommonIE_Types all;

import from RSL_Emulation all;
import from RSL_Types all;

import from BTS_Tests all;



/* convert from boolean value to BIT1 */
private function bool2bit1(boolean inp) return BIT1 {
	if (inp) {
		return '1'B;
	} else {
		return '0'B;
	}
}

/* encode a VBS/VGCS call reference into it's OCT5 representation */
private function f_enc_gcr(integer call_ref, boolean is_group_call, boolean ack_required := false)
return OCT5
{
	var DescriptiveGroupOrBroadcastCallReference_V v := {
		binaryCodingOfGroupOrBroadcastCallReference := int2bit(call_ref, 27),
		sF := bool2bit1(is_group_call),
		aF := bool2bit1(ack_required),
		callPriority := '000'B,
		cipheringInformation := '0000'B,
		spare := '0000'B
	}
	return bit2oct(encvalue(v));
}

/* Send Notification command to start and stop notifying an ASCI call.
 * When it starts, it is expected that NCH is received by MS. Also it is expected that NCH is received again.
 * When it stops, it is expected that NCH is not received anymore. */
testcase TC_vbs_notification() runs on test_CT
{
	timer T;

	f_init();
	f_init_l1ctl();
	f_l1_tune(L1CTL);

	var OCT5 gcr := f_enc_gcr(hex2int('2342'H), false, false);
	var OCT3 chan_desc := '234266'O;
	var octetstring notif_nch := '090620B42230000091A1330B2B2B2B2B2B2B2B2B2B2B2B'O;
	var integer recv_count := 0;

	log("Sending RSL NOTIF_CMD (start)");
	RSL_CCHAN.send(ts_ASP_RSL_UD(ts_RSL_NOTIF_CMD_START(gcr, chan_desc)));

	/* NCH must be received twice. */
	T.start(2.0);
	alt {
	[] L1CTL.receive(tr_L1CTL_DATA_IND(t_RslChanNr_PCH_AGCH(0), ?, notif_nch)) {
		log("Received matching NOTIFICATION/NCH.");
		recv_count := recv_count + 1;
		if (recv_count != 2) {
			repeat;
		}
		T.stop;
		}
	[] L1CTL.receive { repeat; }
	[] T.timeout {
		setverdict(fail, "Timeout waiting for NCH message");
		}
	}

	log("Sending RSL NOTIF_CMD (stop)");
	RSL_CCHAN.send(ts_ASP_RSL_UD(ts_RSL_NOTIF_CMD_STOP(gcr)));

	/* Flush pending messages and be sure that the sending of notifications has stopped. */
	f_sleep(1.0);
	L1CTL.clear;

	/* NCH must not be received. */
	T.start(2.0);
	alt {
	[] L1CTL.receive(tr_L1CTL_DATA_IND(t_RslChanNr_PCH_AGCH(0), ?, notif_nch)) {
		T.stop;
		setverdict(fail, "Received unexpected NOTIFICATION/NCH.");
		}
	[] L1CTL.receive { repeat; }
	[] T.timeout {
		log("Not received NOTIFICATION/NCH. (as expected)");
		setverdict(pass);
		}
	}

	Misc_Helpers.f_shutdown(__BFILE__, __LINE__);
}

control {
	execute( TC_vbs_notification() );

}

}