hlr/HLR_Tests.ttcn

module HLR_Tests {

/* HLR test suite in TTCN-3
 * (C) 2017-2018 Harald Welte <laforge@gnumonks.org>
 * (C) 2018 sysmocom - s.f.m.c. GmbH
 * (C) 2018 Vadim Yanitskiy <axilirator@gmail.com>
 * All rights reserved.
 *
 * Released under the terms of GNU General Public License, Version 2 or
 * (at your option) any later version.
 *
 * SPDX-License-Identifier: GPL-2.0-or-later
 */



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

import from General_Types all;
import from Osmocom_Types all;
import from Osmocom_CTRL_Adapter all;

import from TCCEncoding_Functions all;
import from SS_Types all;
import from SS_Templates all;
import from MAP_Errors all;
import from USSD_Helpers all;

import from Osmocom_VTY_Functions all;
import from TELNETasp_PortType all;

type component test_CT extends CTRL_Adapter_CT {
	var IPA_Emulation_CT vc_IPA;
	var IPA_CCM_Parameters ccm_pars;
	/* legacy tests without ConnHdlr */
	port IPA_GSUP_PT GSUP;
	/* new tests using ConnHdlr + GSUP_Emulation */
	var GSUP_Emulation_CT vc_GSUP;
	/* only to get events from IPA underneath GSUP */
	port IPA_CTRL_PT GSUP_IPA_EVENT;

	port TELNETasp_PT VTY;

	timer g_Tguard := 10.0;
};

modulepar {
	charstring mp_hlr_ip := "127.0.0.1";
	integer mp_hlr_gsup_port := 4222;
	integer mp_hlr_ctrl_port := 4259;
};

type record HlrSubscrAud2G {
	charstring algo,
	OCT16 ki
}

type record HlrSubscrAud3G {
	charstring algo,
	OCT16 k,
	OCT16 op,
	boolean op_is_opc
}

type record HlrSubscriber {
	hexstring imsi,
	hexstring msisdn,
	HlrSubscrAud2G aud2g optional,
	HlrSubscrAud3G aud3g optional
}

type record of HlrSubscriber HlrSubscriberList;

type component HLR_ConnHdlr extends GSUP_ConnHdlr {
	timer g_Tguard := 10.0;
	var HLR_ConnHdlrPars g_pars;
	port TELNETasp_PT VTY;
}

type record HLR_ConnHdlrPars {
	HlrSubscriber sub,
	HLR_ConnHdlrParsUssd ussd optional
}

type record HLR_ConnHdlrParsUssd {
	OCT4 sid
}

template (value) HLR_ConnHdlrPars t_Pars(hexstring imsi, hexstring msisdn := ''H) := {
	sub := {
		imsi := imsi,
		msisdn := msisdn,
		aud2g := omit,
		aud3g := omit
	},
	ussd := omit
}

template (value) HLR_ConnHdlrPars t_Pars_sub(HlrSubscriber sub) := {
	sub := sub,
	ussd := omit
}

type function void_fn() runs on HLR_ConnHdlr;

/***********************************************************************
 * Main Component
 ***********************************************************************/

function f_init_vty() runs on test_CT {
	map(self:VTY, system:VTY);
	f_vty_set_prompts(VTY);
	f_vty_transceive(VTY, "enable");
}

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

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

	ccm_pars := c_IPA_default_ccm_pars;
	ccm_pars.name := "Osmocom TTCN-3 GSUP Simulator";
	ccm_pars.ser_nr := "MSC-00-00-00-00-00-00";

	vc_IPA := IPA_Emulation_CT.create(id & "-IPA");
	log("legacy= ", legacy);
	if (not legacy) {
		log("in not legacy case 1");
		vc_GSUP := GSUP_Emulation_CT.create(id);
	}

	map(vc_IPA:IPA_PORT, system:IPA_CODEC_PT);
	if (not legacy) {
		log("in not legacy case 2");
		connect(vc_GSUP:GSUP, vc_IPA:IPA_GSUP_PORT);
		connect(vc_IPA:IPA_CTRL_PORT, self:GSUP_IPA_EVENT);
		vc_GSUP.start(GSUP_Emulation.main(ops, id));
	} else {
		connect(vc_IPA:IPA_GSUP_PORT, self:GSUP);
	}

	vc_IPA.start(IPA_Emulation.main_client(mp_hlr_ip, mp_hlr_gsup_port, "", -1, ccm_pars));

	/* wait for incoming connection to GSUP port before proceeding */
	timer T := 10.0;
	T.start;
	alt {
		[not legacy] GSUP_IPA_EVENT.receive(t_ASP_IPA_EVT_UD(ASP_IPA_EVENT_UP)) { }
		[legacy] GSUP.receive(ASP_IPA_Event:{up_down := ASP_IPA_EVENT_UP}) { }
		[] T.timeout {
			setverdict(fail, "No connection to GSUP Port");
			mtc.stop;
		}
	}
}

function f_init(boolean legacy := true) runs on test_CT {

	/* activate default guard timer to ensure all tests eventually terminate */
	g_Tguard.start;
	activate(as_Tguard());

	f_init_gsup("HLR_Test", legacy);
	f_init_vty();

	f_ipa_ctrl_start(mp_hlr_ip, mp_hlr_ctrl_port);
}

function f_start_handler(void_fn fn, HLR_ConnHdlrPars pars) runs on test_CT return HLR_ConnHdlr {
	var HLR_ConnHdlr vc_conn;
	var charstring id := testcasename();

	vc_conn := HLR_ConnHdlr.create(id);
	connect(vc_conn:GSUP, vc_GSUP:GSUP_CLIENT);
	connect(vc_conn:GSUP_PROC, vc_GSUP:GSUP_PROC);

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

private function f_handler_init_vty() runs on HLR_ConnHdlr {
	map(self:VTY, system:VTY);
	f_vty_set_prompts(VTY);
	f_vty_transceive(VTY, "enable");
}

/* first function inside ConnHdlr component; sets g_pars + starts function */
function f_handler_init(void_fn fn, charstring id, template (omit) HLR_ConnHdlrPars pars := omit)
runs on HLR_ConnHdlr
{
	if (isvalue(pars)) {
		g_pars := valueof(pars);
		f_create_gsup_expect(hex2str(g_pars.sub.imsi));
	}
	f_handler_init_vty();
	fn.apply();
}

/***********************************************************************
 * Subscriber creation via VTY
 ***********************************************************************/

template (value) HlrSubscriber t_SubNoAuth(hexstring imsi, hexstring msisdn) := {
	imsi := imsi,
	msisdn := msisdn,
	aud2g := omit,
	aud3g := omit
}

const OCT16 c_KI_DEFAULT := '000102030405060708090a0b0c0d0e0f'O;
const OCT16 c_K_DEFAULT := '101112131415161718191a1b1c1d1e1f'O;
const OCT16 c_OP_DEFAULT := '202122232425262728292a2b2c2d2e2f'O;
//const OCT16 c_OPC_DEFAULT := '303132333435363738393a3b3c3d3f'O;

template (value) HlrSubscriber t_Sub2G(hexstring imsi, hexstring msisdn, charstring algo) := {
	imsi := imsi,
	msisdn := msisdn,
	aud2g := {
		algo := algo,
		ki := c_KI_DEFAULT
	},
	aud3g := omit
}

template (value) HlrSubscriber t_Sub3G(hexstring imsi, hexstring msisdn, charstring algo, boolean is_opc) := {
	imsi := imsi,
	msisdn := msisdn,
	aud2g := omit,
	aud3g := {
		algo := algo,
		k := c_K_DEFAULT,
		op := c_OP_DEFAULT,
		op_is_opc := is_opc
	}
}

template (value) HlrSubscriber t_Sub2G3G(hexstring imsi, hexstring msisdn, charstring algo2g, charstring algo3g, boolean is_opc) := {
	imsi := imsi,
	msisdn := msisdn,
	aud2g := {
		algo := algo2g,
		ki := c_KI_DEFAULT
	},
	aud3g := {
		algo := algo3g,
		k := c_K_DEFAULT,
		op := c_OP_DEFAULT,
		op_is_opc := is_opc
	}
}

/* generate a variety of subscribers with different parameters */
function f_gen_subs() runs on test_CT return HlrSubscriberList {
	var HlrSubscriber sub;
	var HlrSubscriberList sl := {};

	sub := valueof(t_Sub2G(f_rnd_imsi('26242'H), '49161'H & f_rnd_hexstring(7, 9), "comp128v1"));
	sl := sl & { sub };

	sub := valueof(t_Sub2G(f_rnd_imsi('26242'H), '49161'H & f_rnd_hexstring(7, 9), "comp128v2"));
	sl := sl & { sub };

	sub := valueof(t_Sub2G(f_rnd_imsi('26242'H), '49161'H & f_rnd_hexstring(7, 9), "comp128v3"));
	sl := sl & { sub };

	sub := valueof(t_Sub3G(f_rnd_imsi('26242'H), '49161'H & f_rnd_hexstring(7, 9), "milenage", false));
	sl := sl & { sub };

	sub := valueof(t_Sub3G(f_rnd_imsi('26242'H), '49161'H & f_rnd_hexstring(7, 9), "milenage", true));
	sl := sl & { sub };

	sub := valueof(t_Sub2G3G(f_rnd_imsi('26242'H), '49161'H & f_rnd_hexstring(7, 9),
				 "comp128v1", "milenage", false));
	sl := sl & { sub };

	sub := valueof(t_Sub2G3G(f_rnd_imsi('26242'H), '49161'H & f_rnd_hexstring(7, 9),
				 "comp128v2", "milenage", false));
	sl := sl & { sub };

	sub := valueof(t_Sub2G3G(f_rnd_imsi('26242'H), '49161'H & f_rnd_hexstring(7, 9),
				 "comp128v3", "milenage", false));
	sl := sl & { sub };

	return sl;
}

function f_vty_transceive_match(TELNETasp_PT pt, charstring cmd, template charstring exp_ret) {
	var charstring ret := f_vty_transceive_ret(pt, cmd);
	if (not match(ret, exp_ret)) {
		setverdict(fail, "Non-matching VTY response: ", ret);
		mtc.stop;
	}
}

private template (value) charstring t_subscr_prefix(hexstring imsi) :=
	"subscriber imsi " & hex2str(imsi) & " ";

/* create a given subscriber using the VTY */
function f_vty_subscr_create(TELNETasp_PT VTY, HlrSubscriber sub) {
	var charstring prefix := valueof(t_subscr_prefix(sub.imsi));
	f_vty_transceive_match(VTY, prefix & "create", pattern "% Created subscriber *");
	f_vty_transceive_match(VTY, prefix & "update msisdn " & hex2str(sub.msisdn),
				pattern "% Updated subscriber *");
	if (ispresent(sub.aud2g)) {
		f_vty_transceive_match(VTY, prefix & "update aud2g " & sub.aud2g.algo &
					" ki " & oct2str(sub.aud2g.ki),
					pattern "");
	} else {
		f_vty_transceive_match(VTY, prefix & "update aud2g none", pattern "");
	}

	if (ispresent(sub.aud3g)) {
		var charstring op_mode := "op";
		if (sub.aud3g.op_is_opc) {
			op_mode := "opc";
		}
		f_vty_transceive_match(VTY, prefix & "update aud3g " & sub.aud3g.algo &
					" k " & oct2str(sub.aud3g.k) & " " & op_mode & " " &
					oct2str(sub.aud3g.op), pattern "");
	} else {
		f_vty_transceive_match(VTY, prefix & "update aud3g none", pattern "");
	}
}

function f_vty_subscr_update_msisdn(TELNETasp_PT VTY, HlrSubscriber sub, hexstring new_msisdn) {
	var charstring prefix := valueof(t_subscr_prefix(sub.imsi));
	f_vty_transceive_match(VTY, prefix & "update msisdn " & hex2str(new_msisdn),
				pattern "% Updated subscriber *");
}

/* perform 'delete' on subscriber */
function f_vty_subscr_delete(TELNETasp_PT VTY, HlrSubscriber sub) {
	var charstring prefix := valueof(t_subscr_prefix(sub.imsi));
	f_vty_transceive_match(VTY, prefix & "delete",
				pattern "% Deleted subscriber for IMSI *");
}

/* perform 'show' on subscriber; match result with pattern 'exp' */
function f_vty_subscr_show(TELNETasp_PT VTY, HlrSubscriber sub, template charstring exp) {
	var charstring prefix := valueof(t_subscr_prefix(sub.imsi));
	f_vty_transceive_match(VTY, prefix & "show", exp);
}


/***********************************************************************
 * Helper functions for ConnHdlr
 ***********************************************************************/

/* perform SendAuthInfo for given imsi, return the GSUP response/error */
function f_perform_SAI(hexstring imsi, template (omit) integer exp_err_cause := omit)
runs on HLR_ConnHdlr return GSUP_PDU {
	var GSUP_PDU ret;
	timer T := 3.0;
	var boolean exp_fail := false;
	if (not istemplatekind(exp_err_cause, "omit")) {
		exp_fail := true;
	}

	GSUP.send(valueof(ts_GSUP_SAI_REQ(imsi)));
	T.start;
	alt {
	[exp_fail] GSUP.receive(tr_GSUP_SAI_ERR(imsi, exp_err_cause)) -> value ret {
		setverdict(pass);
		}
	[exp_fail] GSUP.receive(tr_GSUP_SAI_ERR(imsi, ?)) -> value ret {
		setverdict(fail, "Unexpected SAI ERROR Cause");
		}
	[exp_fail] GSUP.receive(tr_GSUP_SAI_RES(imsi)) -> value ret {
		setverdict(fail, "Unexpected SAI.res for unknown IMSI");
		}
	[not exp_fail] GSUP.receive(tr_GSUP_SAI_ERR(imsi, ?)) -> value ret {
		setverdict(fail, "Unexpected SAI ERROR");
		}
	[not exp_fail] GSUP.receive(tr_GSUP_SAI_RES(imsi)) -> value ret {
		setverdict(pass);
		}
	[] GSUP.receive { repeat; }
	[] T.timeout {
		setverdict(fail, "Timeout waiting for SAI response");
		mtc.stop;
		}
	}
	return ret;
}

function f_perform_UL(hexstring imsi, template hexstring msisdn,
			template (omit) integer exp_err_cause := omit)
runs on HLR_ConnHdlr return GSUP_PDU {
	var GSUP_PDU ret;
	timer T := 3.0;
	var boolean exp_fail := false;
	var boolean isd_done := false;
	if (not istemplatekind(exp_err_cause, "omit")) {
		exp_fail := true;
	}

	GSUP.send(valueof(ts_GSUP_UL_REQ(imsi)));
	T.start;
	alt {
	[exp_fail] GSUP.receive(tr_GSUP_UL_ERR(imsi, exp_err_cause)) -> value ret {
		setverdict(pass);
		}
	[exp_fail] GSUP.receive(tr_GSUP_UL_ERR(imsi, ?)) -> value ret {
		setverdict(fail, "Unexpected UL ERROR Cause");
		}
	[exp_fail] GSUP.receive(tr_GSUP_UL_RES(imsi)) -> value ret {
		setverdict(fail, "Unexpected UL.res for unknown IMSI");
		}
	[exp_fail] GSUP.receive(tr_GSUP_ISD_REQ(imsi)) -> value ret {
		setverdict(fail, "Unexpected ISD.req in error case");
		}
	[not exp_fail] GSUP.receive(tr_GSUP_UL_ERR(imsi, ?)) -> value ret {
		setverdict(fail, "Unexpected UL ERROR");
		}
	[not exp_fail and not isd_done] GSUP.receive(tr_GSUP_ISD_REQ(imsi, msisdn)) -> value ret {
		GSUP.send(ts_GSUP_ISD_RES(imsi));
		isd_done := true;
		repeat;
		}
	[not exp_fail and isd_done] GSUP.receive(tr_GSUP_UL_RES(imsi)) -> value ret {
		setverdict(pass);
		}
	[] GSUP.receive { repeat; }
	[] T.timeout {
		setverdict(fail, "Timeout waiting for UL response");
		mtc.stop;
		}
	}
	return ret;
}

/* perform PurgeMS for given imsi, return the GSUP response/error */
function f_perform_PURGE(hexstring imsi, GSUP_CnDomain cn_dom,
			 template (omit) integer exp_err_cause := omit)
runs on HLR_ConnHdlr return GSUP_PDU {
	var GSUP_PDU ret;
	timer T := 3.0;
	var boolean exp_fail := false;
	if (not istemplatekind(exp_err_cause, "omit")) {
		exp_fail := true;
	}

	GSUP.send(valueof(ts_GSUP_PURGE_MS_REQ(imsi, cn_dom)));
	T.start;
	alt {
	[exp_fail] GSUP.receive(tr_GSUP_PURGE_MS_ERR(imsi, exp_err_cause)) -> value ret {
		setverdict(pass);
		}
	[exp_fail] GSUP.receive(tr_GSUP_PURGE_MS_ERR(imsi, ?)) -> value ret {
		setverdict(fail, "Unexpected PURGE ERROR Cause");
		}
	[exp_fail] GSUP.receive(tr_GSUP_PURGE_MS_RES(imsi)) -> value ret {
		setverdict(fail, "Unexpected PURGE.res for unknown IMSI");
		}
	[not exp_fail] GSUP.receive(tr_GSUP_PURGE_MS_ERR(imsi, ?)) -> value ret {
		setverdict(fail, "Unexpected PURGE ERROR");
		}
	[not exp_fail] GSUP.receive(tr_GSUP_PURGE_MS_RES(imsi)) -> value ret {
		setverdict(pass);
		}
	[] GSUP.receive { repeat; }
	[] T.timeout {
		setverdict(fail, "Timeout waiting for PURGE response");
		mtc.stop;
		}
	}
	return ret;
}

function f_SS_xceive(hexstring imsi, OCT4 sid, GSUP_SessionState state, octetstring ss,
			 template (omit) integer exp_err_cause := omit)
runs on HLR_ConnHdlr return GSUP_PDU {
	var GSUP_PDU ret;
	timer T := 3.0;
	var boolean exp_fail := false;
	if (not istemplatekind(exp_err_cause, "omit")) {
		exp_fail := true;
	}

	GSUP.send(valueof(ts_GSUP_PROC_SS_REQ(imsi, sid, state, ss)));
	T.start;
	alt {
	[exp_fail] GSUP.receive(tr_GSUP_PROC_SS_ERR(imsi, sid, ?, exp_err_cause)) -> value ret {
		setverdict(pass);
		}
	[exp_fail] GSUP.receive(tr_GSUP_PROC_SS_ERR(imsi, sid, ?, ?)) -> value ret {
		setverdict(fail, "Unexpected PROC_SS ERROR Cause");
		}
	[exp_fail] GSUP.receive(tr_GSUP_PROC_SS_RES(imsi, sid, ?, ?)) -> value ret {
		setverdict(fail, "Unexpected PROC_SS.res for unknown IMSI");
		}
	[not exp_fail] GSUP.receive(tr_GSUP_PROC_SS_ERR(imsi, sid, ?, ?)) -> value ret {
		setverdict(fail, "Unexpected PROC_SS ERROR");
		}
	[not exp_fail] GSUP.receive(tr_GSUP_PROC_SS_RES(imsi, sid, ?, ?)) -> value ret {
		setverdict(pass);
		}
	[] GSUP.receive { repeat; }
	[] T.timeout {
		setverdict(fail, "Timeout waiting for PROC_SS response");
		self.stop;
		}
	}
	return ret;
}

private function f_SS_expect(hexstring imsi, OCT4 sid, GSUP_SessionState state,
			     template SS_FacilityInformation facility := *)
runs on HLR_ConnHdlr return GSUP_PDU {
	var GSUP_PDU ret;
	timer T := 3.0;
	var boolean exp_ss := true;
	if (istemplatekind(facility, "omit")) {
		exp_ss := false;
	}
	T.start;
	alt {
	[] GSUP.receive(tr_GSUP_PROC_SS_ERR(imsi, sid, ?, ?)) -> value ret {
		setverdict(fail, "Unexpected PROC_SS ERROR Cause");
		}
	[not exp_ss] GSUP.receive(tr_GSUP_PROC_SS_RES(imsi, sid, state, omit)) -> value ret {
		setverdict(pass);
		}
	[exp_ss] GSUP.receive(tr_GSUP_PROC_SS_RES(imsi, sid, state, omit)) -> value ret {
		setverdict(fail, "Unexpected PROC_SS.res without SS IE");
		}
/*
	[exp_ss] GSUP.receive(tr_GSUP_PROC_SS_RES(imsi, sid, state, decmatch facility)) -> value ret {
		setverdict(pass);
		}
*/

	[exp_ss] GSUP.receive(tr_GSUP_PROC_SS_RES(imsi, sid, state, ?)) -> value ret {
		var GSUP_IeValue ss_ie;
		f_gsup_find_ie(ret, OSMO_GSUP_SS_INFO_IE, ss_ie);
		var SS_FacilityInformation dec_fac := dec_SS_FacilityInformation(ss_ie.ss_info);
		log("pattern: ", facility);
		if (match(dec_fac, facility)) {
			setverdict(pass);
		} else {
			setverdict(fail, "Unexpected PROC_SS.res with non-matching facility IE");
		}
		}
	[] GSUP.receive { repeat; }
	[] T.timeout {
		setverdict(fail, "Timeout waiting for PROC_SS response");
		self.stop;
		}
	}

	return ret;
}



/***********************************************************************
 * Testcases
 ***********************************************************************/

/* 23.003 Section 2.2 clearly states that an IMSI with less
 * than 5 digits is impossible. Even 5 digits is still questionable */
private function f_TC_gsup_sai_err_invalid_imsi() runs on HLR_ConnHdlr {
	var GSUP_PDU res;
	res := f_perform_SAI(g_pars.sub.imsi, 96); /* Invalid Mandatory information */
	setverdict(pass);
}
testcase TC_gsup_sai_err_invalid_imsi() runs on test_CT {
	var HLR_ConnHdlr vc_conn;
	var HLR_ConnHdlrPars pars := valueof(t_Pars('0123'H));
	f_init(false);
	vc_conn := f_start_handler(refers(f_TC_gsup_sai_err_invalid_imsi), pars);
	vc_conn.done;
}


private function f_TC_gsup_sai_err_unknown_imsi() runs on HLR_ConnHdlr {
	var GSUP_PDU res;
	res := f_perform_SAI(g_pars.sub.imsi, 2);
	setverdict(pass);
}

testcase TC_gsup_sai_err_unknown_imsi() runs on test_CT {
	var HLR_ConnHdlr vc_conn;
	var HLR_ConnHdlrPars pars := valueof(t_Pars(f_rnd_imsi('26242'H)));
	f_init(false);
	vc_conn := f_start_handler(refers(f_TC_gsup_sai_err_unknown_imsi), pars);
	vc_conn.done;
}

function f_start_handler_per_sub(void_fn fn, HlrSubscriberList sl) runs on test_CT {
	for (var integer i := 0; i < sizeof(sl); i := i+1) {
		var HlrSubscriber sub := sl[i];
		var HLR_ConnHdlrPars pars := valueof(t_Pars_sub(sub));
		var HLR_ConnHdlr vc_conn;

		f_vty_subscr_create(VTY, sub);
		vc_conn := f_start_handler(fn, pars);
		vc_conn.done;
		f_vty_subscr_delete(VTY, sub);
	}
}

/* test SAI for a number of different subscriber cases (algo, 2g/3g, ...) */
private function f_TC_gsup_sai() runs on HLR_ConnHdlr {
	var GSUP_PDU res;
	res := f_perform_SAI(g_pars.sub.imsi);
	/* TODO: match if tuple[s] matches expectation */
	setverdict(pass);
}
testcase TC_gsup_sai() runs on test_CT {
	var HlrSubscriberList sl;
	var GSUP_PDU res;

	f_init(false);

	sl := f_gen_subs();
	f_start_handler_per_sub(refers(f_TC_gsup_sai), sl);

	setverdict(pass);
}

/* test UL for unknown IMSI */
private function f_TC_ul_unknown_imsi() runs on HLR_ConnHdlr {
	var GSUP_PDU res;
	res := f_perform_UL(g_pars.sub.imsi, ?, 2);
	setverdict(pass);
}
testcase TC_gsup_ul_unknown_imsi() runs on test_CT {
	var hexstring imsi := f_rnd_imsi('26242'H);
	var HLR_ConnHdlrPars pars := valueof(t_Pars(imsi));
	var HLR_ConnHdlr vc_conn;

	f_init(false);
	vc_conn := f_start_handler(refers(f_TC_ul_unknown_imsi), pars);
	vc_conn.done;
}

/* test UL for a number of different subscriber cases (algo, 2g/3g, ...) */
private function f_TC_gsup_ul() runs on HLR_ConnHdlr {
	var GSUP_PDU res;
	res := f_perform_UL(g_pars.sub.imsi, g_pars.sub.msisdn);
	setverdict(pass);
}
testcase TC_gsup_ul() runs on test_CT {
	var HlrSubscriberList sl;
	var GSUP_PDU res;

	f_init(false);
	sl := f_gen_subs();
	f_start_handler_per_sub(refers(f_TC_gsup_ul), sl);

	setverdict(pass);
}

/* Test only the VTY commands */
testcase TC_vty() runs on test_CT {
	var HlrSubscriber sub;

	f_init();

	/* we're not using f_gen_subs() here as the expect pattern for the 'show' are different
	 * from case to case */
	sub := valueof(t_Sub2G(f_rnd_imsi('26242'H), '49161'H & f_rnd_hexstring(7, 9), "comp128v1"));
	f_vty_subscr_create(VTY, sub);
	f_vty_subscr_show(VTY, sub, pattern "*IMSI: *2G auth: COMP128v1*");
	f_vty_subscr_delete(VTY, sub);

	sub := valueof(t_Sub3G(f_rnd_imsi('26242'H), '49161'H & f_rnd_hexstring(7, 9),
				"milenage", false));
	f_vty_subscr_create(VTY, sub);
	f_vty_subscr_show(VTY, sub, pattern "*IMSI: *3G auth: MILENAGE*");
	f_vty_subscr_delete(VTY, sub);

	sub := valueof(t_Sub2G3G(f_rnd_imsi('26242'H), '49161'H & f_rnd_hexstring(7, 9),
				 "comp128v1", "milenage", false));
	f_vty_subscr_create(VTY, sub);
	f_vty_subscr_show(VTY, sub, pattern "*IMSI: *2G auth: COMP128v1*3G auth: MILENAGE*");
	f_vty_subscr_delete(VTY, sub);

	setverdict(pass);
}

/* VTY changes to MSISDN should result in ISD to current VLR */
private function f_TC_vty_msisdn_isd() runs on HLR_ConnHdlr {
	var hexstring new_msisdn;
	var GSUP_PDU res;
	timer T := 5.0;

	/* Create Subscriber */
	f_vty_subscr_create(VTY, g_pars.sub);

	/* Perform UpdateLocation (VLR now known to HLR) */
	res := f_perform_UL(g_pars.sub.imsi, g_pars.sub.msisdn);

	/* Then change IMSI via VTY */
	new_msisdn := '49161'H & f_rnd_hexstring(7, 9);
	f_vty_subscr_update_msisdn(VTY, g_pars.sub, new_msisdn);
	/* And expect InsertSubscriberData as result */
	T.start;
	alt {
	[] GSUP.receive(tr_GSUP_ISD_REQ(g_pars.sub.imsi, new_msisdn)) {
		GSUP.send(ts_GSUP_ISD_RES(g_pars.sub.imsi));
		g_pars.sub.msisdn := new_msisdn;
		setverdict(pass);
		}
	[] GSUP.receive(tr_GSUP_ISD_REQ(g_pars.sub.imsi, g_pars.sub.msisdn)) {
		log("received ISD req with old MSISDN");
		setverdict(fail);
		}
	[] GSUP.receive { repeat; }
	[] T.timeout {
		setverdict(fail, "Timeout waiting for ISD.req");
		}
	}
}
testcase TC_vty_msisdn_isd() runs on test_CT {
	var HlrSubscriber sub;
	var HLR_ConnHdlr vc_conn;

	f_init(false);

	/* Create Subscriber */
	sub := valueof(t_Sub2G(f_rnd_imsi('26242'H), '49161'H & f_rnd_hexstring(7, 9), "comp128v1"));

	vc_conn := f_start_handler(refers(f_TC_vty_msisdn_isd), valueof(t_Pars_sub(sub)));
	vc_conn.done;
}

/* Test PURGE MS for CS services */
private function f_TC_gsup_purge_cs() runs on HLR_ConnHdlr {
	var GSUP_PDU res;
	res := f_perform_UL(g_pars.sub.imsi, g_pars.sub.msisdn);
	res := f_perform_PURGE(g_pars.sub.imsi, OSMO_GSUP_CN_DOMAIN_CS);
}
testcase TC_gsup_purge_cs() runs on test_CT {
	var HlrSubscriberList sl;
	var GSUP_PDU res;

	f_init(false);
	sl := f_gen_subs();
	f_start_handler_per_sub(refers(f_TC_gsup_purge_cs), sl);

	setverdict(pass);
}

/* Test PURGE MS for PS services */
private function f_TC_gsup_purge_ps() runs on HLR_ConnHdlr {
	var GSUP_PDU res;
	res := f_perform_UL(g_pars.sub.imsi, g_pars.sub.msisdn);
	res := f_perform_PURGE(g_pars.sub.imsi, OSMO_GSUP_CN_DOMAIN_PS);
}
testcase TC_gsup_purge_ps() runs on test_CT {
	var HlrSubscriberList sl;

	f_init(false);
	sl := f_gen_subs();
	f_start_handler_per_sub(refers(f_TC_gsup_purge_ps), sl);

	setverdict(pass);
}

/* Test PURGEG MS procedure for unknown IMSI */

private function f_TC_gsup_purge_unknown() runs on HLR_ConnHdlr {
	var GSUP_PDU res;
	res := f_perform_PURGE(g_pars.sub.imsi, OSMO_GSUP_CN_DOMAIN_CS, 2);
}
testcase TC_gsup_purge_unknown() runs on test_CT {
	var hexstring imsi := '2345743413463'H;
	var HLR_ConnHdlrPars pars := valueof(t_Pars(imsi));
	var HLR_ConnHdlr vc_conn;

	f_init(false);
	vc_conn := f_start_handler(refers(f_TC_ul_unknown_imsi), pars);
	vc_conn.done;

	setverdict(pass);
}

import from HLR_EUSE all;

/* Test for USSD request to undefined/unrouted short-code. Expect ss-NotAvailable(18) */
private function f_TC_mo_ussd_unknown() runs on HLR_ConnHdlr {
	var GSUP_PDU res;
	var octetstring ss := f_USSD_FACILITY_IE_INVOKE(
					op_code := SS_OP_CODE_PROCESS_USS_REQ,
					ussd_string := "*#200#");
	GSUP.send(valueof(ts_GSUP_PROC_SS_REQ(g_pars.sub.imsi, g_pars.ussd.sid,
						OSMO_GSUP_SESSION_STATE_BEGIN, ss)));
	res := f_SS_expect(g_pars.sub.imsi, g_pars.ussd.sid,
			   OSMO_GSUP_SESSION_STATE_END,
			   tr_SS_FACILITY_RETURN_ERROR(1, 18));
}
testcase TC_mo_ussd_unknown() runs on test_CT {
	var HlrSubscriberList sl;
	var HLR_ConnHdlr vc_conn;

	f_init(false);
	sl := f_gen_subs();
	for (var integer i := 0; i < sizeof(sl); i := i+1) {
		var HLR_ConnHdlrPars pars := valueof(t_Pars_sub(sl[i]));
		pars.ussd.sid := f_rnd_octstring(4);
		f_vty_subscr_create(VTY, pars.sub);
		vc_conn := f_start_handler(refers(f_TC_mo_ussd_unknown), pars);
		vc_conn.done;
	}
}

/* Test for USSD request to currently disconnected EUSE. Expect ss-SystemFailure(34) */
private function f_TC_mo_ussd_euse_disc() runs on HLR_ConnHdlr {
	var GSUP_PDU res;
	var octetstring ss := f_USSD_FACILITY_IE_INVOKE(
					op_code := SS_OP_CODE_PROCESS_USS_REQ,
					ussd_string := "*100#");
	GSUP.send(valueof(ts_GSUP_PROC_SS_REQ(g_pars.sub.imsi, g_pars.ussd.sid,
						OSMO_GSUP_SESSION_STATE_BEGIN, ss)));
	res := f_SS_expect(g_pars.sub.imsi, g_pars.ussd.sid,
			   OSMO_GSUP_SESSION_STATE_END,
			   tr_SS_FACILITY_RETURN_ERROR(1, 34));
}
testcase TC_mo_ussd_euse_disc() runs on test_CT {
	var HlrSubscriberList sl;
	var HLR_ConnHdlr vc_conn;

	f_init(false);
	sl := f_gen_subs();
	for (var integer i := 0; i < sizeof(sl); i := i+1) {
		var HLR_ConnHdlrPars pars := valueof(t_Pars_sub(sl[i]));
		pars.ussd.sid := f_rnd_octstring(4);
		f_vty_subscr_create(VTY, pars.sub);
		vc_conn := f_start_handler(refers(f_TC_mo_ussd_euse_disc), pars);
		vc_conn.done;
	}
}

/* Test for USSD request to internal own-imsi IUSE. */
private function f_TC_mo_ussd_iuse_imsi() runs on HLR_ConnHdlr {
	var GSUP_PDU res;
	var charstring resp_str;
	var octetstring ss := f_USSD_FACILITY_IE_INVOKE(
					op_code := SS_OP_CODE_PROCESS_USS_REQ,
					ussd_string := "*#101#");
	GSUP.send(valueof(ts_GSUP_PROC_SS_REQ(g_pars.sub.imsi, g_pars.ussd.sid,
						OSMO_GSUP_SESSION_STATE_BEGIN, ss)));
	resp_str := "Your IMSI is " & hex2str(g_pars.sub.imsi);
	res := f_SS_expect(g_pars.sub.imsi, g_pars.ussd.sid,
			   OSMO_GSUP_SESSION_STATE_END,
			   tr_SS_USSD_FACILITY_RETURN_RESULT(1, 59, SS_USSD_DEFAULT_DCS,
							     f_encGSM7bit(resp_str)));
}
testcase TC_mo_ussd_iuse_imsi() runs on test_CT {
	var HlrSubscriberList sl;
	var HLR_ConnHdlr vc_conn;

	f_init(false);
	sl := f_gen_subs();
	for (var integer i := 0; i < sizeof(sl); i := i+1) {
		var HLR_ConnHdlrPars pars := valueof(t_Pars_sub(sl[i]));
		pars.ussd.sid := f_rnd_octstring(4);
		f_vty_subscr_create(VTY, pars.sub);
		vc_conn := f_start_handler(refers(f_TC_mo_ussd_iuse_imsi), pars);
		vc_conn.done;
	}
}

/* Test for USSD request to internal own-msisdn IUSE. */
private function f_TC_mo_ussd_iuse_msisdn() runs on HLR_ConnHdlr {
	var GSUP_PDU res;
	var charstring resp_str;
	var octetstring ss := f_USSD_FACILITY_IE_INVOKE(
					op_code := SS_OP_CODE_PROCESS_USS_REQ,
					ussd_string := "*#100#");
	GSUP.send(valueof(ts_GSUP_PROC_SS_REQ(g_pars.sub.imsi, g_pars.ussd.sid,
						OSMO_GSUP_SESSION_STATE_BEGIN, ss)));
	resp_str := "Your extension is " & hex2str(g_pars.sub.msisdn);
	res := f_SS_expect(g_pars.sub.imsi, g_pars.ussd.sid,
			   OSMO_GSUP_SESSION_STATE_END,
			   tr_SS_USSD_FACILITY_RETURN_RESULT(1, 59, SS_USSD_DEFAULT_DCS,
							     f_encGSM7bit(resp_str)));
}
testcase TC_mo_ussd_iuse_msisdn() runs on test_CT {
	var HlrSubscriberList sl;
	var HLR_ConnHdlr vc_conn;

	f_init(false);
	sl := f_gen_subs();
	for (var integer i := 0; i < sizeof(sl); i := i+1) {
		var HLR_ConnHdlrPars pars := valueof(t_Pars_sub(sl[i]));
		pars.ussd.sid := f_rnd_octstring(4);
		f_vty_subscr_create(VTY, pars.sub);
		vc_conn := f_start_handler(refers(f_TC_mo_ussd_iuse_msisdn), pars);
		vc_conn.done;
	}
}

/* Test routing of USSD to EUSE by a specific route */
private function f_TC_mo_ussd_100() runs on HLR_ConnHdlr {
	var GSUP_PDU res;
	/* invoke / invoke id 1 / processUSS-req */
	//var octetstring ss := 'a11202010102013b300a04010f0405aa180c3602'O;
	var octetstring ss := f_USSD_FACILITY_IE_INVOKE(
					op_code := SS_OP_CODE_PROCESS_USS_REQ,
					ussd_string := "*100#");
	GSUP.send(valueof(ts_GSUP_PROC_SS_REQ(g_pars.sub.imsi, g_pars.ussd.sid,
						OSMO_GSUP_SESSION_STATE_BEGIN, ss)));
	res := f_SS_expect(g_pars.sub.imsi, g_pars.ussd.sid,
			   OSMO_GSUP_SESSION_STATE_END,
			   tr_SS_USSD_FACILITY_RETURN_RESULT(1, 59, SS_USSD_DEFAULT_DCS,
							     f_encGSM7bit("*100#")));
}
testcase TC_mo_ussd_euse() runs on test_CT {
	var HlrSubscriberList sl;
	var HLR_ConnHdlr vc_conn;

	var HLR_EUSE_CT vc_EUSE := HLR_EUSE_CT.create("EUSE-" & testcasename());
	vc_EUSE.start(HLR_EUSE.f_main_mo(mp_hlr_ip, mp_hlr_gsup_port, "foobar", refers(f_ss_echo)));

	f_init(false);
	sl := f_gen_subs();
	for (var integer i := 0; i < sizeof(sl); i := i+1) {
		var HLR_ConnHdlrPars pars := valueof(t_Pars_sub(sl[i]));
		pars.ussd.sid := f_rnd_octstring(4);
		f_vty_subscr_create(VTY, pars.sub);
		vc_conn := f_start_handler(refers(f_TC_mo_ussd_100), pars);
		vc_conn.done;
	}

	vc_EUSE.stop;
}

/* Test routing of USSD to EUSE by a specific route, with CONTINUE */
private function f_TC_mo_ussd_100_continue() runs on HLR_ConnHdlr {
	var GSUP_PDU res;
	/* Simulate BEGIN from MS/MSC */
	var octetstring ss := f_USSD_FACILITY_IE_INVOKE(op_code := SS_OP_CODE_PROCESS_USS_REQ,
							ussd_string := "*100#");
	GSUP.send(valueof(ts_GSUP_PROC_SS_REQ(g_pars.sub.imsi, g_pars.ussd.sid,
						OSMO_GSUP_SESSION_STATE_BEGIN, ss)));
	/* expect echo response from EUSE */
	res := f_SS_expect(g_pars.sub.imsi, g_pars.ussd.sid,
			   OSMO_GSUP_SESSION_STATE_CONTINUE,
			   tr_SS_USSD_FACILITY_RETURN_RESULT(1, 59, SS_USSD_DEFAULT_DCS,
							     f_encGSM7bit("*100#")));

	/* Simulate CONTINUE from MS/MSC */
	ss := f_USSD_FACILITY_IE_INVOKE(op_code := SS_OP_CODE_PROCESS_USS_REQ,
					ussd_string := "mahlzeit");
	GSUP.send(valueof(ts_GSUP_PROC_SS_REQ(g_pars.sub.imsi, g_pars.ussd.sid,
						OSMO_GSUP_SESSION_STATE_CONTINUE, ss)));

	/* expect echo response from EUSE */
	res := f_SS_expect(g_pars.sub.imsi, g_pars.ussd.sid,
			   OSMO_GSUP_SESSION_STATE_END,
			   tr_SS_USSD_FACILITY_RETURN_RESULT(1, 59, SS_USSD_DEFAULT_DCS,
							     f_encGSM7bit("mahlzeit")));
}
testcase TC_mo_ussd_euse_continue() runs on test_CT {
	var HlrSubscriberList sl;
	var HLR_ConnHdlr vc_conn;

	var HLR_EUSE_CT vc_EUSE := HLR_EUSE_CT.create("EUSE-" & testcasename());
	vc_EUSE.start(HLR_EUSE.f_main_mo(mp_hlr_ip, mp_hlr_gsup_port, "foobar",
					 refers(f_ss_echo_continue)));

	f_init(false);
	sl := f_gen_subs();
	for (var integer i := 0; i < sizeof(sl); i := i+1) {
		var HLR_ConnHdlrPars pars := valueof(t_Pars_sub(sl[i]));
		pars.ussd.sid := f_rnd_octstring(4);
		f_vty_subscr_create(VTY, pars.sub);
		vc_conn := f_start_handler(refers(f_TC_mo_ussd_100_continue), pars);
		vc_conn.done;
	}

	vc_EUSE.stop;
}


/* Test routing of USSD to EUSE by default-route */
private function f_TC_mo_ussd_999() runs on HLR_ConnHdlr {
	var GSUP_PDU res;
	var octetstring ss := f_USSD_FACILITY_IE_INVOKE(
					op_code := SS_OP_CODE_PROCESS_USS_REQ,
					ussd_string := "*999#");
	GSUP.send(valueof(ts_GSUP_PROC_SS_REQ(g_pars.sub.imsi, g_pars.ussd.sid,
						OSMO_GSUP_SESSION_STATE_BEGIN, ss)));
	res := f_SS_expect(g_pars.sub.imsi, g_pars.ussd.sid,
			   OSMO_GSUP_SESSION_STATE_END,
			   tr_SS_USSD_FACILITY_RETURN_RESULT(1, 59, SS_USSD_DEFAULT_DCS,
							     f_encGSM7bit("*999#")));
}
testcase TC_mo_ussd_euse_defaultroute() runs on test_CT {
	var HlrSubscriberList sl;
	var HLR_ConnHdlr vc_conn;

	var HLR_EUSE_CT vc_EUSE := HLR_EUSE_CT.create("EUSE-" & testcasename());
	vc_EUSE.start(HLR_EUSE.f_main_mo(mp_hlr_ip, mp_hlr_gsup_port, "foobar", refers(f_ss_echo)));

	f_init(false);
	f_vty_config(VTY, "hlr", "ussd default-route external foobar");

	sl := f_gen_subs();
	for (var integer i := 0; i < sizeof(sl); i := i+1) {
		var HLR_ConnHdlrPars pars := valueof(t_Pars_sub(sl[i]));
		pars.ussd.sid := f_rnd_octstring(4);
		f_vty_subscr_create(VTY, pars.sub);
		vc_conn := f_start_handler(refers(f_TC_mo_ussd_999), pars);
		vc_conn.done;
	}

	f_vty_config(VTY, "hlr", "no ussd default-route");
	vc_EUSE.stop;
}

/**
 * Test "Structured" Supplementary Services
 *
 * NOTE: at the moment, OsmoHLR doesn't support "structured" SS,
 * so such requests are being rejected (actually ReturnError
 * with GSM0480_ERR_CODE_FACILITY_NOT_SUPPORTED).
 */
private function f_TC_mo_sss_reject() runs on HLR_ConnHdlr {
	var SS_FacilityInformation ss_req;
	var GSUP_PDU res;

	/* Prepare '*#21#' SS request */
	ss_req := valueof(ts_SS_FACILITY_INVOKE(
		invoke_id := 0,
		op_code := SS_OP_CODE_INTERROGATE_SS,
		ss_code := '21'O));

	/* Send it towards HLR */
	GSUP.send(valueof(ts_GSUP_PROC_SS_REQ(
		g_pars.sub.imsi,
		g_pars.ussd.sid,
		OSMO_GSUP_SESSION_STATE_BEGIN,
		enc_SS_FacilityInformation(ss_req))));

	/* Expect ReturnError with FACILITY_NOT_SUPPORTED */
	res := f_SS_expect(g_pars.sub.imsi, g_pars.ussd.sid,
			   OSMO_GSUP_SESSION_STATE_END,
			   tr_SS_FACILITY_RETURN_ERROR(0, 21));
}
testcase TC_mo_sss_reject() runs on test_CT {
	var HLR_ConnHdlrPars pars;
	var HLR_ConnHdlr vc_conn;
	var HlrSubscriber sub;

	f_init(false);

	/* Create a random subscriber */
	sub := valueof(t_Sub2G(f_rnd_imsi('26242'H),
		'49161'H & f_rnd_hexstring(7, 9), "comp128v1"));
	pars := valueof(t_Pars_sub(sub));
	pars.ussd.sid := f_rnd_octstring(4);

	f_vty_subscr_create(VTY, sub);
	vc_conn := f_start_handler(refers(f_TC_mo_sss_reject), pars);
	vc_conn.done;
	f_vty_subscr_delete(VTY, sub);
}


/* TODO USSD:
   * MO USSD for IMSI of non-existant subscriber
   * MT USSD from EUSE
   * timeout cases
 */

/* TODO:
  * UL with ISD error
  * UL with ISD timeout
  * LOCATION CANCEL
  * AUTH FAIL REP
  * DELETE DATA after hlr_subscr_nam() change
  * correctness
  ** wrong message type
  ** wrong length of PDU
  ** too short message
  ** missing IMSI IE

 */

control {
	execute( TC_gsup_sai_err_invalid_imsi() );
	execute( TC_gsup_sai() );
	execute( TC_gsup_ul_unknown_imsi() );
	execute( TC_gsup_sai_err_unknown_imsi() );
	execute( TC_gsup_ul() );
	execute( TC_vty() );
	execute( TC_vty_msisdn_isd() );
	execute( TC_gsup_purge_cs() );
	execute( TC_gsup_purge_ps() );
	execute( TC_gsup_purge_unknown() );

	execute( TC_mo_ussd_unknown() );
	execute( TC_mo_ussd_euse_disc() );
	execute( TC_mo_ussd_iuse_imsi() );
	execute( TC_mo_ussd_iuse_msisdn() );
	execute( TC_mo_ussd_euse() );
	execute( TC_mo_ussd_euse_continue() );
	execute( TC_mo_ussd_euse_defaultroute() );

	/* "Structured" Supplementary Services */
	execute( TC_mo_sss_reject() );
};

};