Osmocom test suites in TTCN-3 (Eclipse Titan) https://osmocom.org/projects/core-testing-infra
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/* (C) 2018 by sysmocom s.f.m.c. GmbH <info@sysmocom.de>
* Author: Stefan Sperling <ssperling@sysmocom.de>
* All Rights Reserved
* The idea is that these tests are executed against sccp_demo_user from
* libosmo-sccp.git in server mode.
* 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
module SCCP_Tests {
import from M3UA_Emulation all;
import from SCCPasp_Types all;
import from SCCP_Types all;
import from SCCP_Emulation all;
import from SCCP_Templates all;
import from SCTPasp_PortType all;
import from Osmocom_CTRL_Adapter all;
import from TELNETasp_PortType all;
import from Osmocom_VTY_Functions all;
type component system_CT {
port SCTPasp_PT sctp;
type component MTC_CT extends CTRL_Adapter_CT {
/* VTY to sccp_demo_user (not used yet) */
/* SCCP protocol runs on top of M3UA Emulation.
* "System Under Test" is libosmo-sccp's sccp_demo_user example program. */
var SCCP_CT vc_SCCP_A;
var M3UA_CT vc_M3UA;
port SCCPasp_PT A_PORT;
type record SCCP_Configuration {
charstring sccp_service_type,
SCTP_Association_Address sctp_addr,
integer own_pc,
integer own_ssn,
integer peer_pc,
integer peer_ssn,
octetstring sio,
integer rctx
type record of SCCP_Configuration SCCP_Configurations;
modulepar {
SCCP_Configurations mp_sccp_cfg;
function f_init(SCCP_Configuration cfg) runs on MTC_CT {
var MSC_SCCP_MTP3_parameters v_param := {
sio := {
ni := substr(oct2bit(cfg.sio),0,2),
prio := substr(oct2bit(cfg.sio),2,2),
si := substr(oct2bit(cfg.sio),4,4)
opc := cfg.own_pc,
dpc := cfg.peer_pc,
sls := 0,
sccp_serviceType := cfg.sccp_service_type,
ssn := cfg.own_ssn
f_vty_transceive(SCCP_DEMO_USER_VTY, "enable");
/* Create and connect test components for an SCCP connection with M3UA beneath. */
vc_SCCP_A := SCCP_CT.create;
vc_M3UA := M3UA_CT.create;
connect(self:A_PORT, vc_SCCP_A:SCCP_SP_PORT);
connect(vc_M3UA:MTP3_SP_PORT, vc_SCCP_A:MTP3_SCCP_PORT);
map(vc_M3UA:SCTP_PORT, system:sctp);
function f_cleanup() runs on MTC_CT {
all component.stop;
unmap(vc_M3UA:SCTP_PORT, system:sctp);
disconnect(vc_M3UA:MTP3_SP_PORT, vc_SCCP_A:MTP3_SCCP_PORT);
disconnect(self:A_PORT, vc_SCCP_A:SCCP_SP_PORT);
* libosmo-sccp does not support Global Title address as a routing indicator.
* But sccp_demo_user should not crash if such a message is received (see OS#2666).
testcase TC_routing_global_title_crash() runs on MTC_CT system system_CT {
timer TL_timer:= 10.0; /* twice the sccp_demo_user connection attempt interval */
var SCCP_PAR_Address v_CallingAddress;
var SCCP_PAR_Address v_CalledAddress;
var octetstring vl_userdata :='12345678901234567890'O;
/* Called address with routing indicator set to Global Title Address. This used to trigger the crash. */
v_CalledAddress := valueof(ts_SccpAddr_GT('012345'H));
v_CallingAddress := valueof(ts_SccpAddr_PC_SSN(mp_sccp_cfg[0].own_pc, mp_sccp_cfg[0].own_ssn,
mp_sccp_cfg[0].sio, mp_sccp_cfg[0].sccp_service_type));
A_PORT.send(t_ASP_N_UNITDATA_req(v_CalledAddress, v_CallingAddress, '00000001'B /* sequence control */,
'00000001'B /* return option */, vl_userdata, omit));
* Start a timeout within which our DATA packet will be sent out.
* The M3UA Emulation layer has buffered the packet and is going
* to send it when the sccp_demo_user SCCP client connects.
* libosmo-sccp will echo the packet back at us in an SCCP UDTS packet.
* However, the current M3UA Emulation implementation will discard this
* response because it arrives on a separate SCTP association and the
* emulation only supports one association at a time.
* As a workaround, we wait for a fixed amount of time and then issue
* another command to the VTY of sccp_demo_user. If sccp_demo_user
* has crashed, this will result in a test failure.
alt {
[] A_PORT.receive(tr_ASP_N_UNITDATA_ind) -> value vl_N_UNITDATA_ind {
log("Received data from SCCP client.");
[] TL_timer.timeout {
/* Check that the VTY is still active (implying that the process hasn't crashed). */
f_vty_transceive_ret(SCCP_DEMO_USER_VTY, "?");
control {
execute( TC_routing_global_title_crash() );