Osmocom test suites in TTCN-3 (Eclipse Titan) https://osmocom.org/projects/core-testing-infra
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osmo-ttcn3-hacks/smlc/SMLC_Tests.ttcn

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module SMLC_Tests {
/* Integration Tests for OsmoSMLC
* (C) 2020 by sysmocom - s.f.m.c. GmbH <info@sysmocom.de>
* 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
*
* This test suite tests OsmoSMLC while emulating both multiple BTS + MS as
* well as the MSC. See README for more details.
*
* There are test cases that run in so-called 'handler mode' and test cases
* that run directly on top of the BSSAP and RSL CodecPorts. The "handler mode"
* tests abstract the multiplexing/demultiplexing of multiple SCCP connections
* and/or RSL channels and are hence suitable for higher-level test cases, while
* the "raw" tests directly on top of the CodecPorts are more suitable for lower-
* level testing.
*/
import from Misc_Helpers all;
import from General_Types all;
import from Osmocom_Types all;
import from BSSAP_LE_Adapter all;
import from BSSAP_LE_CodecPort all;
import from BSSAP_LE_Types all;
import from BSSAP_LE_Emulation all;
import from BSSMAP_LE_Templates all;
import from BSSLAP_Types all;
import from BSSAP_Types all;
import from BSSMAP_Templates all;
import from Osmocom_CTRL_Functions all;
import from Osmocom_CTRL_Types all;
import from Osmocom_CTRL_Adapter all;
import from Osmocom_VTY_Functions all;
import from TELNETasp_PortType all;
import from SCCP_Templates all;
import from SCCPasp_Types all;
import from BSC_ConnectionHandler all;
const integer NUM_BSC := 1;
/* Default list of counters for 'smlc' */
const CounterNameVals counternames_bsc := {
{ "foo:bar", 0 }
};
type component test_CT extends CTRL_Adapter_CT {
var BSSAP_LE_Adapter g_bssap_le[NUM_BSC];
port BSSAP_LE_CODEC_PT BSSAP_LE;
port TELNETasp_PT SMLCVTY;
/* are we initialized yet */
var boolean g_initialized := false;
/*Configure T(tias) over VTY, seconds */
var integer g_smlc_sccp_timer_ias := 7 * 60;
/*Configure T(tiar) over VTY, seconds */
var integer g_smlc_sccp_timer_iar := 15 * 60;
/* global test case guard timer (actual timeout value is set in f_init()) */
timer T_guard := 30.0;
var CounterNameValsList g_ctr_smlc;
var CounterNameValsList g_ctr_bsc;
}
type record of BSSAP_LE_Configuration BSSAP_LE_Configurations;
modulepar {
/* IP address at which the SMLC can be reached */
charstring mp_smlc_ip := "127.0.0.1";
/* port number to which to establish the IPA CTRL connection */
integer mp_smlc_ctrl_port := 4272;
/* IP address at which the test binds */
charstring mp_test_ip := "127.0.0.1";
BSSAP_LE_Configurations mp_bssap_le_cfg := {
{
sccp_service_type := "mtp3_itu",
sctp_addr := { 23908, "127.0.0.1", 2905, "127.0.0.1" },
own_pc := 187, /* 0.23.3 first BSC emulation */
own_ssn := 250, /* BSC side SSN */
peer_pc := 190, /* 0.23.6 osmo-smlc */
peer_ssn := 252, /* SMLC side SSN */
sio := '83'O,
rctx := 1
}
};
}
private function f_gen_test_hdlr_pars(integer bssap_le_idx := 0) return TestHdlrParams {
var TestHdlrParams pars := valueof(t_def_TestHdlrPars);
return pars;
}
/* Convenience functions for rate counters using g_ctr_bsc. */
private function f_ctrs_smlc_init(integer bscs_count := NUM_BSC, CounterNameVals counternames := counternames_bsc) runs on test_CT {
g_ctr_bsc := f_counter_name_vals_get_n(IPA_CTRL, "bsc", bscs_count, counternames);
log("initial msc rate counters: ", g_ctr_bsc);
}
private function f_ctrs_smlc_add(integer msc_nr, charstring countername, integer val := 1) runs on test_CT {
f_counter_name_vals_list_add(g_ctr_bsc, msc_nr, countername, val);
}
/* f_ctrs_smlc_init();
* f_do_thing(on_msc := 0);
* f_do_thing(on_msc := 0);
* f_do_other(on_msc := 1);
* f_ctrs_smlc_add(0, "thing", 2);
* f_ctrs_smlc_add(1, "other");
* f_ctrs_smlc_verify();
*/
private function f_ctrs_smlc_verify() runs on test_CT {
log("verifying msc rate counters: ", g_ctr_bsc);
f_counter_name_vals_expect_n(IPA_CTRL, "bsc", g_ctr_bsc);
}
/* convenience: f_ctrs_smlc_add() and f_ctrs_smlc_verify() in one call.
* f_ctrs_smlc_init();
* f_do_thing(on_msc := 0);
* f_do_thing(on_msc := 0);
* f_do_thing(on_msc := 0);
* f_ctrs_smlc_expect(0, "thing", 3);
*/
private function f_ctrs_smlc_expect(integer msc_nr, charstring countername, integer val := 1) runs on test_CT {
f_ctrs_smlc_add(msc_nr, countername, val);
f_ctrs_smlc_verify();
}
private function f_shutdown_helper() runs on test_CT {
all component.stop;
setverdict(pass);
mtc.stop;
}
/* global altstep for global guard timer */
altstep as_Tguard() runs on test_CT {
[] T_guard.timeout {
setverdict(fail, "Timeout of T_guard");
mtc.stop;
}
}
private function f_logp(TELNETasp_PT pt, charstring log_msg)
{
// log on TTCN3 log output
log(log_msg);
// log in stderr log
f_vty_transceive(pt, "logp lglobal notice TTCN3 f_logp(): " & log_msg);
}
/* global initialization function
* \param nr_bts Number of BTSs we should start/bring up
* \param handler_mode Start an RSL_Emulation_CT component (true) or not (false).
* \param nr_msc Number of virtual MSCs to bring up to connect to osmo-bsc.
*/
function f_init(integer nr_bsc := NUM_BSC, float guard_timeout := 30.0) runs on test_CT {
var integer bssap_le_idx;
if (g_initialized) {
return;
}
g_initialized := true;
T_guard.start(guard_timeout);
activate(as_Tguard());
f_init_vty("VirtBSC");
for (bssap_le_idx := 0; bssap_le_idx < nr_bsc; bssap_le_idx := bssap_le_idx+1) {
f_bssap_le_adapter_init(g_bssap_le[bssap_le_idx], mp_bssap_le_cfg[bssap_le_idx], "VirtBSC", BSC_BssapLeOps);
f_bssap_le_adapter_start(g_bssap_le[bssap_le_idx]);
}
}
function f_init_vty(charstring id := "foo") runs on test_CT {
if (SMLCVTY.checkstate("Mapped")) {
/* skip initialization if already executed once */
return;
}
map(self:SMLCVTY, system:SMLCVTY);
f_vty_set_prompts(SMLCVTY);
f_vty_transceive(SMLCVTY, "enable");
f_cs7_inst_0_cfg(SMLCVTY, {"sccp-timer ias " & int2str(g_smlc_sccp_timer_ias),
"sccp-timer iar " & int2str(g_smlc_sccp_timer_iar)});
}
type function void_fn(charstring id) runs on BSC_ConnHdlr;
private function f_connect_handler(inout BSC_ConnHdlr vc_conn, integer bssap_le_idx := 0) runs on test_CT {
connect(vc_conn:BSSAP_LE, g_bssap_le[bssap_le_idx].vc_BSSAP_LE:CLIENT);
connect(vc_conn:BSSAP_LE_PROC, g_bssap_le[bssap_le_idx].vc_BSSAP_LE:PROC);
}
function f_start_handler(void_fn fn, template (omit) TestHdlrParams pars := omit)
runs on test_CT return BSC_ConnHdlr {
var charstring id := testcasename();
var BSC_ConnHdlr vc_conn;
var integer bssap_le_idx := 0;
if (isvalue(pars)) {
bssap_le_idx := valueof(pars).bssap_le_idx;
}
vc_conn := BSC_ConnHdlr.create(id);
f_connect_handler(vc_conn, bssap_le_idx);
/* Emit a marker to appear in the SUT's own logging output */
f_logp(SMLCVTY, testcasename() & "() start");
vc_conn.start(f_handler_init(fn, id, pars));
return vc_conn;
}
private function f_handler_init(void_fn fn, charstring id, template (omit) TestHdlrParams pars := omit)
runs on BSC_ConnHdlr {
if (isvalue(pars)) {
g_pars := valueof(pars);
}
fn.apply(id);
}
type record of charstring Commands;
private function f_cs7_inst_0_cfg(TELNETasp_PT pt, Commands cmds := {})
{
f_vty_enter_cfg_cs7_inst(pt, 0);
for (var integer i := 0; i < sizeof(cmds); i := i+1) {
f_vty_transceive(pt, cmds[i]);
}
f_vty_transceive(pt, "end");
}
template (value) PDU_BSSAP_LE ts_BSSMAP_LE_BSSLAP(template (value) BSSLAP_PDU bsslap)
:= ts_BSSMAP_LE_ConnInfo(BSSMAP_LE_PROT_BSSLAP, data := enc_BSSLAP_PDU(valueof(bsslap)));
template PDU_BSSAP_LE tr_BSSMAP_LE_BSSLAP(template BSSLAP_PDU bsslap)
:= tr_BSSMAP_LE_ConnInfo(BSSMAP_LE_PROT_BSSLAP, data := enc_BSSLAP_PDU(valueof(bsslap)));
/* BSC sends Perform Location Request that already contains a TA Layer 3 BSSLAP APDU */
private function f_tc_smlc_location_request_with_ta_l3(charstring id) runs on BSC_ConnHdlr {
f_sleep(1.0);
f_BscConnHdlr_init();
f_bssap_le_register_imsi(g_pars.imsi, omit);
var uint16_t cell_id := 42;
var BSSMAP_IE_CellIdentifier cell_ident := valueof(ts_CellID_LAC_CI(23, cell_id));
BSSAP_LE.send(ts_BSSAP_LE_Conn_Req(g_pars.sccp_addr_smlc, g_pars.sccp_addr_bsc,
valueof(ts_BSSMAP_LE_PerfLocReq(BSSMAP_LE_LOC_INFO_CURRENT_GEOGRAPHIC_LOC, cell_ident, g_pars.imsi,
enc_BSSLAP_PDU(valueof(ts_BSSLAP_TA_Layer3(23)))))));
BSSAP_LE.receive(BSSAP_LE_Conn_Prim:CONN_PRIM_CONF_IND);
/* SMLC got the TA from the BSC, now responds with geo information data. */
/* TODO: implement GAD coding in ttcn */
/* Expecting geo:
* 0001 .... = Location estimate: Ellipsoid point with uncertainty Circle (1)
* 0... .... = Sign of latitude: North (0)
* .010 0001 0000 1001 1100 1001 = Degrees of latitude: 2165193 (23.23000 degrees)
* 0001 1110 0010 1010 0101 0011 = Degrees of longitude: 1976915 (42.42000 degrees)
* .100 1010 = Uncertainty code: 74 (11552.7 m)
* [Location OSM URI: https://www.openstreetmap.org/?mlat=23.23000&mlon=42.42000&zoom=12]
*/
var octetstring geo := '102109C91E2A534A'O;
BSSAP_LE.receive(tr_BSSMAP_LE_PerfLocResp(geo, omit));
f_sleep(2.0);
setverdict(pass);
}
testcase TC_smlc_location_request_with_ta_l3() runs on test_CT {
var BSC_ConnHdlr vc_conn;
var TestHdlrParams pars := f_gen_test_hdlr_pars();
f_init();
f_sleep(1.0);
pars.sccp_addr_bsc := g_bssap_le[0].sccp_addr_own;
pars.sccp_addr_smlc := g_bssap_le[0].sccp_addr_peer;
vc_conn := f_start_handler(refers(f_tc_smlc_location_request_with_ta_l3), pars);
vc_conn.done;
}
/* BSC sends Perform Location Request without BSSLAP APDU, SMLC needs to request TA */
private function f_tc_smlc_location_request_without_ta_l3(charstring id) runs on BSC_ConnHdlr {
f_sleep(1.0);
f_BscConnHdlr_init();
f_bssap_le_register_imsi(g_pars.imsi, omit);
var uint16_t cell_id := 42;
var BSSMAP_IE_CellIdentifier cell_ident := valueof(ts_CellID_LAC_CI(23, cell_id));
BSSAP_LE.send(ts_BSSAP_LE_Conn_Req(g_pars.sccp_addr_smlc, g_pars.sccp_addr_bsc,
valueof(ts_BSSMAP_LE_PerfLocReq(BSSMAP_LE_LOC_INFO_CURRENT_GEOGRAPHIC_LOC, cell_ident, g_pars.imsi))));
BSSAP_LE.receive(BSSAP_LE_Conn_Prim:CONN_PRIM_CONF_IND);
/* SMLC wants to ask the TA from the SMLC explicitly in a BSSLAP TA Request message */
BSSAP_LE.receive(tr_BSSMAP_LE_BSSLAP(tr_BSSLAP_TA_Req));
/* BSC figures out the TA and sends it back to the SMLC */
BSSAP_LE.send(ts_BSSMAP_LE_BSSLAP(ts_BSSLAP_TA_Resp(cell_id, 23)));
/* SMLC got the TA from the BSC, now responds with geo information data. */
/* TODO: implement GAD coding in ttcn */
/* Expecting geo:
* 0001 .... = Location estimate: Ellipsoid point with uncertainty Circle (1)
* 0... .... = Sign of latitude: North (0)
* .010 0001 0000 1001 1100 1001 = Degrees of latitude: 2165193 (23.23000 degrees)
* 0001 1110 0010 1010 0101 0011 = Degrees of longitude: 1976915 (42.42000 degrees)
* .100 1010 = Uncertainty code: 74 (11552.7 m)
* [Location OSM URI: https://www.openstreetmap.org/?mlat=23.23000&mlon=42.42000&zoom=12]
*/
var octetstring geo := '102109C91E2A534A'O;
BSSAP_LE.receive(tr_BSSMAP_LE_PerfLocResp(geo, omit));
f_sleep(2.0);
setverdict(pass);
}
testcase TC_smlc_location_request_without_ta_l3() runs on test_CT {
var BSC_ConnHdlr vc_conn;
var TestHdlrParams pars := f_gen_test_hdlr_pars();
f_init(1);
f_sleep(1.0);
pars.sccp_addr_bsc := g_bssap_le[0].sccp_addr_own;
pars.sccp_addr_smlc := g_bssap_le[0].sccp_addr_peer;
vc_conn := f_start_handler(refers(f_tc_smlc_location_request_without_ta_l3), pars);
vc_conn.done;
}
/* BSC sends Perform Location Request, halfway the BSC indicates handover via BSSLAP Reset */
private function f_tc_smlc_location_request_bsslap_reset(charstring id) runs on BSC_ConnHdlr {
f_sleep(1.0);
f_BscConnHdlr_init();
f_bssap_le_register_imsi(g_pars.imsi, omit);
var uint16_t cell_id := 1;
var BSSMAP_IE_CellIdentifier cell_ident := valueof(ts_CellID_LAC_CI(1, cell_id));
BSSAP_LE.send(ts_BSSAP_LE_Conn_Req(g_pars.sccp_addr_smlc, g_pars.sccp_addr_bsc,
valueof(ts_BSSMAP_LE_PerfLocReq(BSSMAP_LE_LOC_INFO_CURRENT_GEOGRAPHIC_LOC, cell_ident, g_pars.imsi))));
BSSAP_LE.receive(BSSAP_LE_Conn_Prim:CONN_PRIM_CONF_IND);
/* SMLC wants to ask the TA from the SMLC explicitly in a BSSLAP TA Request message */
BSSAP_LE.receive(tr_BSSMAP_LE_BSSLAP(tr_BSSLAP_TA_Req));
/* BSC reports a Handover via a BSSLAP Reset */
BSSAP_LE.send(ts_BSSMAP_LE_BSSLAP(ts_BSSLAP_Reset(17, 42,
valueof(ts_BSSLAP_IE_ChanDesc),
BSSLAP_CAUSE_INTRA_BSS_HO)));
/* SMLC got the TA from the BSC via BSSLAP Reset, now responds with geo information data. */
/* TODO: implement GAD coding in ttcn */
/* Expecting geo:
* 0001 .... = Location estimate: Ellipsoid point with uncertainty Circle (1)
* 0... .... = Sign of latitude: North (0)
* .000 1011 0011 1000 1011 0100 = Degrees of latitude: 735412 (7.89012 degrees)
* 0000 0110 0101 0100 0110 1011 = Degrees of longitude: 414827 (8.90122 degrees)
* .101 0001 = Uncertainty code: 81 (22522.4 m)
* [Location OSM URI: https://www.openstreetmap.org/?mlat=7.89012&mlon=8.90122&zoom=12]
*/
var octetstring geo := '100B38B406546B51'O;
BSSAP_LE.receive(tr_BSSMAP_LE_PerfLocResp(geo, omit));
f_sleep(2.0);
setverdict(pass);
}
testcase TC_smlc_location_request_bsslap_reset() runs on test_CT {
var BSC_ConnHdlr vc_conn;
var TestHdlrParams pars := f_gen_test_hdlr_pars();
f_init(1);
f_sleep(1.0);
pars.sccp_addr_bsc := g_bssap_le[0].sccp_addr_own;
pars.sccp_addr_smlc := g_bssap_le[0].sccp_addr_peer;
vc_conn := f_start_handler(refers(f_tc_smlc_location_request_bsslap_reset), pars);
vc_conn.done;
}
/* BSC sends Perform Location Request, halfway the BSC aborts the request because of inter-BSC HO */
private function f_tc_smlc_location_request_abort(charstring id) runs on BSC_ConnHdlr {
f_sleep(1.0);
f_BscConnHdlr_init();
f_bssap_le_register_imsi(g_pars.imsi, omit);
var uint16_t cell_id := 42;
var BSSMAP_IE_CellIdentifier cell_ident := valueof(ts_CellID_LAC_CI(23, cell_id));
BSSAP_LE.send(ts_BSSAP_LE_Conn_Req(g_pars.sccp_addr_smlc, g_pars.sccp_addr_bsc,
valueof(ts_BSSMAP_LE_PerfLocReq(BSSMAP_LE_LOC_INFO_CURRENT_GEOGRAPHIC_LOC, cell_ident, g_pars.imsi))));
BSSAP_LE.receive(BSSAP_LE_Conn_Prim:CONN_PRIM_CONF_IND);
/* SMLC wants to ask the TA from the SMLC explicitly in a BSSLAP TA Request message */
BSSAP_LE.receive(tr_BSSMAP_LE_BSSLAP(tr_BSSLAP_TA_Req));
/* BSC aborts */
BSSAP_LE.send(ts_BSSMAP_LE_PerfLocAbort(BSSMAP_LE_LCS_CAUSE_INTER_BSC_HO));
var PDU_BSSAP_LE bssap_le;
timer nothing := 7.0;
nothing.start;
alt {
[] BSSAP_LE.receive(tr_BSSAP_LE_BSSMAP) -> value(bssap_le) {
log("unexpected bssap_le: ", bssap_le);
setverdict(fail, "No more messages expected from SMLC");
mtc.stop;
}
[] nothing.timeout {
setverdict(pass);
break;
}
}
f_sleep(2.0);
setverdict(pass);
}
testcase TC_smlc_location_request_abort() runs on test_CT {
var BSC_ConnHdlr vc_conn;
var TestHdlrParams pars := f_gen_test_hdlr_pars();
f_init(1);
f_sleep(1.0);
pars.sccp_addr_bsc := g_bssap_le[0].sccp_addr_own;
pars.sccp_addr_smlc := g_bssap_le[0].sccp_addr_peer;
vc_conn := f_start_handler(refers(f_tc_smlc_location_request_abort), pars);
vc_conn.done;
}
/* BSC sends Perform Location Request, SMLC asks for TA, halfway the BSC aborts the TA request */
private function f_tc_smlc_location_request_bsslap_abort(charstring id) runs on BSC_ConnHdlr {
f_sleep(1.0);
f_BscConnHdlr_init();
f_bssap_le_register_imsi(g_pars.imsi, omit);
var uint16_t cell_id := 42;
var BSSMAP_IE_CellIdentifier cell_ident := valueof(ts_CellID_LAC_CI(23, cell_id));
BSSAP_LE.send(ts_BSSAP_LE_Conn_Req(g_pars.sccp_addr_smlc, g_pars.sccp_addr_bsc,
valueof(ts_BSSMAP_LE_PerfLocReq(BSSMAP_LE_LOC_INFO_CURRENT_GEOGRAPHIC_LOC, cell_ident, g_pars.imsi))));
BSSAP_LE.receive(BSSAP_LE_Conn_Prim:CONN_PRIM_CONF_IND);
/* SMLC wants to ask the TA from the SMLC explicitly in a BSSLAP TA Request message */
BSSAP_LE.receive(tr_BSSMAP_LE_BSSLAP(tr_BSSLAP_TA_Req));
/* BSC aborts the TA Request */
BSSAP_LE.send(ts_BSSMAP_LE_BSSLAP(ts_BSSLAP_Abort(BSSLAP_CAUSE_SUPERV_TIMER_EXPIRED)));
/* Expect response without location, just an LCS Cause indicating abort */
BSSAP_LE.receive(tr_BSSMAP_LE_PerfLocResp(omit, BSSMAP_LE_LCS_CAUSE_REQUEST_ABORTED));
f_sleep(2.0);
setverdict(pass);
}
testcase TC_smlc_location_request_bsslap_abort() runs on test_CT {
var BSC_ConnHdlr vc_conn;
var TestHdlrParams pars := f_gen_test_hdlr_pars();
f_init(1);
f_sleep(1.0);
pars.sccp_addr_bsc := g_bssap_le[0].sccp_addr_own;
pars.sccp_addr_smlc := g_bssap_le[0].sccp_addr_peer;
vc_conn := f_start_handler(refers(f_tc_smlc_location_request_bsslap_abort), pars);
vc_conn.done;
}
control {
execute( TC_smlc_location_request_with_ta_l3() );
execute( TC_smlc_location_request_without_ta_l3() );
execute( TC_smlc_location_request_bsslap_reset() );
execute( TC_smlc_location_request_bsslap_abort() );
execute( TC_smlc_location_request_abort() );
}
}