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

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/* MME (Mobility Management Engine) test suite in TTCN-3
* (C) 2019 Harald Welte <laforge@gnumonks.org>
* 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
*/
module MME_Tests {
import from General_Types all;
import from S1AP_Types all;
import from S1AP_Templates all;
import from S1AP_Emulation all;
import from S1AP_PDU_Descriptions all;
import from S1AP_IEs all;
import from NAS_EPS_Types all;
import from NAS_Templates all;
import from DIAMETER_Types all;
import from DIAMETER_Templates all;
import from DIAMETER_Emulation all;
import from SGsAP_Types all;
import from SGsAP_Templates all;
import from SGsAP_Emulation all;
import from LTE_CryptoFunctions all;
import from L3_Templates all;
import from DNS_Helpers all;
import from Osmocom_Types all;
friend module MME_Tests_SGsAP;
/* (maximum) number of emulated eNBs */
const integer NUM_ENB := 3;
/* (maximum) number of emulated UEs */
const integer NUM_UE := 3;
/* parameters of emulated ENB */
type record EnbParams {
Global_ENB_ID global_enb_id,
integer cell_identity,
SupportedTAs supported_tas
}
/* parameters of emulated UE */
type record UeParams {
hexstring imsi
}
type component MTC_CT {
/* S1 intreface of emulated ENBs */
var EnbParams g_enb_pars[NUM_ENB];
var S1AP_Emulation_CT vc_S1AP[NUM_ENB];
port S1AP_PT S1AP_UNIT[NUM_ENB];
port S1APEM_PROC_PT S1AP_PROC[NUM_ENB];
/* S6a/S6d interface of emulated HSS */
var DIAMETER_Emulation_CT vc_DIAMETER;
port DIAMETER_PT DIAMETER_UNIT;
port DIAMETEREM_PROC_PT DIAMETER_PROC;
/* SGs interface of emulated MSC/VLR */
var SGsAP_Emulation_CT vc_SGsAP;
port SGsAP_PT SGsAP_UNIT;
port SGsAPEM_PROC_PT SGsAP_PROC;
var UeParams g_ue_pars[NUM_UE];
}
type component ConnHdlr extends S1AP_ConnHdlr, SGsAP_ConnHdlr, DIAMETER_ConnHdlr {
var ConnHdlrPars g_pars;
timer g_Tguard := 30.0;
}
type record ConnHdlrPars {
/* copied over from MTC_CT on start of component */
EnbParams enb_pars[NUM_ENB],
/* copied over from MTC_CT on start of component */
UeParams ue_pars,
/* currently used MME (index into enb_pars, S1AP, ...) */
integer mme_idx
}
modulepar {
/* S1 interface */
charstring mp_mme_ip := "127.0.0.1";
integer mp_mme_s1ap_port := 36412;
charstring mp_s1_local_ip := "127.0.0.1";
integer mp_s1_local_port := 50000;
/* S6 interface */
charstring mp_s6_local_ip := "127.0.0.4";
integer mp_s6_local_port := 3868;
/* SGs interface */
charstring mp_sgs_local_ip := "127.0.0.1";
integer mp_sgs_local_port := 29118;
charstring mp_vlr_name := "vlr.example.net";
charstring mp_mme_name := "mmec01.mmegi0001.mme.epc.mnc070.mcc901.3gppnetwork.org";
}
/* send incoming unit data messages (like reset) to global SGsAP_UNIT port */
friend function ForwardUnitdataCallback(PDU_SGsAP msg)
runs on SGsAP_Emulation_CT return template PDU_SGsAP {
SGsAP_UNIT.send(msg);
return omit;
}
friend function f_init_sgsap(charstring id) runs on MTC_CT {
id := id & "-SGsAP";
var SGsAPOps ops := {
create_cb := refers(SGsAP_Emulation.ExpectedCreateCallback),
unitdata_cb := refers(ForwardUnitdataCallback)
}
var SGsAP_conn_parameters pars := {
remote_ip := "",
remote_sctp_port := -1,
local_ip := mp_sgs_local_ip,
local_sctp_port := mp_sgs_local_port
}
vc_SGsAP := SGsAP_Emulation_CT.create(id);
map(vc_SGsAP:SGsAP, system:SGsAP_CODEC_PT);
connect(vc_SGsAP:SGsAP_PROC, self:SGsAP_PROC);
connect(vc_SGsAP:SGsAP_UNIT, self:SGsAP_UNIT);
vc_SGsAP.start(SGsAP_Emulation.main(ops, pars, id));
}
/* send incoming unit data messages (like reset) to global S1AP_UNIT port */
friend function S1apForwardUnitdataCallback(S1AP_PDU msg)
runs on S1AP_Emulation_CT return template S1AP_PDU {
S1AP_UNIT.send(msg);
return omit;
}
friend function S1apCreateCallback(S1AP_PDU msg, template (omit) MME_UE_S1AP_ID mme_id,
template (omit) ENB_UE_S1AP_ID enb_id, charstring id)
runs on S1AP_Emulation_CT return S1AP_ConnHdlr
{
setverdict(fail, "implement this");
mtc.stop;
}
friend function f_init_one_enb(charstring id, integer num := 0) runs on MTC_CT {
id := id & "-S1AP" & int2str(num);
var S1APOps ops := {
create_cb := refers(S1apCreateCallback),
unitdata_cb := refers(S1apForwardUnitdataCallback)
}
var S1AP_conn_parameters pars := {
remote_ip := mp_mme_ip,
remote_sctp_port := mp_mme_s1ap_port,
local_ip := mp_s1_local_ip,
local_sctp_port := mp_s1_local_port + num,
role := NAS_ROLE_UE
}
var PLMNidentity plmn_id := '00f110'O;
var EnbParams enb_pars := {
global_enb_id := {
pLMNidentity := plmn_id,
eNB_ID := {
macroENB_ID := int2bit(num, 20)
},
iE_Extensions := omit
},
cell_identity := num,
supported_tas := {
{
tAC := int2oct(12345, 2),
broadcastPLMNs := { plmn_id },
iE_Extensions := omit
}
}
};
g_enb_pars[num] := enb_pars;
vc_S1AP[num] := S1AP_Emulation_CT.create(id);
map(vc_S1AP[num]:S1AP, system:S1AP_CODEC_PT);
connect(vc_S1AP[num]:S1AP_PROC, self:S1AP_PROC[num]);
connect(vc_S1AP[num]:S1AP_UNIT, self:S1AP_UNIT[num]);
vc_S1AP[num].start(S1AP_Emulation.main(ops, pars, id));
S1AP_UNIT[num].receive(S1APEM_Event:{up_down:=S1APEM_EVENT_UP});
}
friend function f_init_one_ue(inout UeParams uep, integer imsi_suffix) {
uep := {
imsi := f_gen_imsi(imsi_suffix)
}
}
friend function f_init_s1ap(charstring id, integer imsi_suffix) runs on MTC_CT {
var integer i;
for (i := 0; i < NUM_ENB; i := i+1) {
f_init_one_enb(id, i);
}
for (i := 0; i < NUM_UE; i := i+1) {
f_init_one_ue(g_ue_pars[i], i*1000 + imsi_suffix);
}
}
friend function DiameterForwardUnitdataCallback(PDU_DIAMETER msg)
runs on DIAMETER_Emulation_CT return template PDU_DIAMETER {
DIAMETER_UNIT.send(msg);
return omit;
}
friend function f_init_diameter(charstring id) runs on MTC_CT {
var DIAMETEROps ops := {
create_cb := refers(DIAMETER_Emulation.ExpectedCreateCallback),
unitdata_cb := refers(DiameterForwardUnitdataCallback)
};
var DIAMETER_conn_parameters pars := {
remote_ip := mp_mme_ip,
remote_sctp_port := -1,
local_ip := mp_s6_local_ip,
local_sctp_port := mp_s6_local_port,
origin_host := "hss.localdomain",
origin_realm := "localdomain",
vendor_app_id := c_DIAMETER_3GPP_S6_AID
};
vc_DIAMETER := DIAMETER_Emulation_CT.create(id);
map(vc_DIAMETER:DIAMETER, system:DIAMETER_CODEC_PT);
connect(vc_DIAMETER:DIAMETER_UNIT, self:DIAMETER_UNIT);
connect(vc_DIAMETER:DIAMETER_PROC, self:DIAMETER_PROC);
vc_DIAMETER.start(DIAMETER_Emulation.main(ops, pars, id));
f_diameter_wait_capability(DIAMETER_UNIT);
}
friend template (value) TAI ts_enb_S1AP_TAI(EnbParams enb) := {
pLMNidentity := enb.global_enb_id.pLMNidentity,
tAC := enb.supported_tas[0].tAC,
iE_Extensions := omit
}
friend template (value) EUTRAN_CGI ts_enb_S1AP_CGI(EnbParams enb) := {
pLMNidentity := enb.global_enb_id.pLMNidentity,
cell_ID := int2bit(enb.cell_identity, 28),
iE_Extensions := omit
}
/* generate parameters for a connection handler */
friend function f_init_pars(integer ue_idx := 0)
runs on MTC_CT return ConnHdlrPars {
var ConnHdlrPars pars := {
enb_pars := g_enb_pars,
ue_pars := g_ue_pars[ue_idx],
mme_idx := 0
};
return pars;
}
type function void_fn(ConnHdlrPars pars) runs on ConnHdlr;
/* start a connection handler with given parameters */
friend function f_start_handler_with_pars(void_fn fn, ConnHdlrPars pars, integer s1ap_idx := 0)
runs on MTC_CT return ConnHdlr {
var ConnHdlr vc_conn;
var charstring id := testcasename() & int2str(s1ap_idx);
vc_conn := ConnHdlr.create(id);
/* S1AP part */
connect(vc_conn:S1AP, vc_S1AP[s1ap_idx]:S1AP_CLIENT);
connect(vc_conn:S1AP_PROC, vc_S1AP[s1ap_idx]:S1AP_PROC);
if (isbound(vc_SGsAP)) {
/* SGsAP part */
connect(vc_conn:SGsAP, vc_SGsAP:SGsAP_CLIENT);
connect(vc_conn:SGsAP_PROC, vc_SGsAP:SGsAP_PROC);
}
if (isbound(vc_DIAMETER)) {
connect(vc_conn:DIAMETER, vc_DIAMETER:DIAMETER_CLIENT);
connect(vc_conn:DIAMETER_PROC, vc_DIAMETER:DIAMETER_PROC);
}
/* We cannot use vc_conn.start(f_init_handler(fn, id, pars)); as we cannot have
* a stand-alone 'derefers()' call, see https://www.eclipse.org/forums/index.php/t/1091364/ */
vc_conn.start(derefers(fn)(pars));
return vc_conn;
}
/* altstep for the global guard timer */
private altstep as_Tguard()runs on ConnHdlr {
[] g_Tguard.timeout {
setverdict(fail, "Tguard timeout");
mtc.stop;
}
}
friend function f_init_handler(ConnHdlrPars pars, float t_guard := 30.0) runs on ConnHdlr {
/* make parameters available via component variable */
g_pars := pars;
/* start guard timre and activate it as default */
g_Tguard.start(t_guard);
activate(as_Tguard());
if (DIAMETER_PROC.checkstate("Connected")) {
f_diameter_expect(g_pars.ue_pars.imsi);
}
if (SGsAP_PROC.checkstate("Connected")) {
/* Route all SGsAP mesages for our IMSIto us */
f_create_sgsap_expect(pars.ue_pars.imsi);
}
}
friend function f_s1ap_setup(integer idx := 0, template Cause cause := omit) runs on MTC_CT {
var template (present) Cause exp_cause;
var boolean exp_fail := false;
timer T := 5.0;
if (not istemplatekind(cause, "omit")) {
exp_fail := true;
exp_cause := cause;
}
S1AP_UNIT[idx].send(ts_S1AP_SetupReq(g_enb_pars[idx].global_enb_id,
g_enb_pars[idx].supported_tas, v32));
T.start;
alt {
[exp_fail] S1AP_UNIT[idx].receive(tr_S1AP_SetupFail(exp_cause)) {
setverdict(pass);
}
[not exp_fail] S1AP_UNIT[idx].receive(tr_S1AP_SetupResp) {
setverdict(pass);
}
[] S1AP_UNIT[idx].receive {
setverdict(fail, "Received unexpected S1AP");
}
[] T.timeout {
setverdict(fail, "Timeout waiting for S1AP Setup result");
}
}
}
/* Unsuccessful S1 Setup procedure to MME (wrong PLMN) */
testcase TC_s1ap_setup_wrong_plmn() runs on MTC_CT {
var charstring id := testcasename();
f_init_s1ap(id, 1);
g_enb_pars[0].global_enb_id.pLMNidentity := '62F224'O;
f_s1ap_setup(0, {misc:=unknown_PLMN});
}
/* Unsuccessful S1 Setup procedure to MME (wrong PLMN) */
testcase TC_s1ap_setup_wrong_tac() runs on MTC_CT {
var charstring id := testcasename();
f_init_s1ap(id, 2);
g_enb_pars[0].supported_tas[0].broadcastPLMNs[0] := '62F224'O;
f_s1ap_setup(0, {misc:=unknown_PLMN});
}
/* Successful S1 Setup procedure to MME */
testcase TC_s1ap_setup() runs on MTC_CT {
var charstring id := testcasename();
f_init_s1ap(id, 3);
f_s1ap_setup(0);
}
private const EPS_QualityOfServiceV c_NAS_defaultQoS := {
qCI := '00'O,
maxBitRateUplink := omit,
maxBitRateDownlink := omit,
guaranteedBitRateUplink := omit,
guaranteedBitRateDownlink := omit,
maxBitRateUplinkExt := omit,
maxBitRateDownlinkExt := omit,
guaranteedBitRateUplinkExt := omit,
guaranteedBitRateDownlinkExt := omit,
maxBitRateUplinkExt2 := omit,
maxBitRateDownlinkExt2 := omit,
guaranteedBitRateUplinkExt2 := omit,
guaranteedBitRateDownlinkExt2 := omit
};
private const UENetworkCapabilityV c_NAS_defaultUeNetCap := {
eEA := '10000000'B,
eIA := '11000000'B,
uEA := omit,
uIA := omit,
uCS2 := omit,
nF := omit,
vCC := omit,
lCS := omit,
lPP := omit,
aCC_CSFB := omit,
h245_ASH := omit,
proSe := omit,
proSe_dd := omit,
proSe_dc := omit,
proSe_relay := omit,
cP_CIoT := omit,
uP_CIoT := omit,
s1_Udata := omit,
eRwoPDN := omit,
hC_CP_CIoT := omit,
ePCO := omit,
multipleDRB := omit,
v2XPC5 := omit,
restrictEC := omit,
cPbackoff := omit,
dCNR := omit,
n1Mode := omit,
sGC := omit,
spare1 := omit,
spare := omit
};
private const octetstring c_NAS_defaultAPN := '00'O;
private altstep as_s1ap_handle_auth() runs on ConnHdlr {
var PDU_NAS_EPS rx_nas;
[] S1AP.receive(tr_NAS_AuthReq) -> value rx_nas {
/* static XRES result as we fixed the HSS RAND value and always have the following
RAND: 20080c3818183b522614162c07601d0d
AUTN: f11b89a2a8be00001f9c526f3d75d44c
IK: 11329aae8e8d2941bb226b2061137c58
CK: 740d62df9803eebde5120acf358433d0
RES: 6a91970e838fd079
SRES: e91e4777
Kc: 3b0f999e42198874
SQN: 32
IND: 0
*/
/* KASME: 95AFAD9A0D29AFAA079A9451DF7161D7EE4CBF2AF9387F766D058BB6B44B905D */
const OCT16 ck := '740d62df9803eebde5120acf358433d0'O;
const OCT16 ik := '11329aae8e8d2941bb226b2061137c58'O;
const OCT16 autn := 'f11b89a2a8be00001f9c526f3d75d44c'O;
const OCT8 res := '6a91970e838fd079'O;
const OCT3 plmn_id := '00F110'O;
const OCT6 sqn := '000000000020'O;
const OCT6 ak := substr(autn, 0, 6) xor4b sqn;
var octetstring kasme := f_kdf_kasme(ck, ik, plmn_id, sqn, ak);
var S1APEM_Config cfg := {
set_nas_keys := {
k_nas_int := f_kdf_nas_int(1, kasme),
k_nas_enc := f_kdf_nas_enc(1, kasme)
}
};
S1AP.send(cfg);
S1AP.send(ts_NAS_AuthResp(res));
}
}
private altstep as_s1ap_handle_sec_mode() runs on ConnHdlr {
var PDU_NAS_EPS rx_nas;
var NAS_SecurityAlgorithmsV alg := {
typeOfIntegrityProtection := '001'B,
spare1 := '0'B,
typeOfCiphering := '000'B,
spare2 := '0'B
};
var NAS_KeySetIdentifierV kset_id := {
identifier := '000'B,
tSC := '0'B
};
[] S1AP.receive(tr_NAS_SecModeCmd(alg, kset_id, ?)) {
S1AP.send(ts_NAS_SecModeCmpl);
}
}
/* Exepect AuthInfoReq (AIR) from HSS; respond with AuthInforAnswer (AIA) */
private altstep as_DIA_AuthInfo() runs on ConnHdlr {
var PDU_DIAMETER rx_dia;
[] DIAMETER.receive(tr_DIA_AIR(g_pars.ue_pars.imsi)) -> value rx_dia {
var template (omit) AVP avp;
var octetstring sess_id;
var octetstring vplmn_id;
var hexstring imsi;
var template (value) AVP_list auth_info_content;
/* retrieve input data */
imsi := valueof(f_DIAMETER_get_imsi(rx_dia));
avp := f_DIAMETER_get_avp(rx_dia, c_AVP_Code_BASE_NONE_Session_Id);
sess_id := valueof(avp.avp_data.avp_BASE_NONE_Session_Id);
avp := f_DIAMETER_get_avp(rx_dia, c_AVP_Code_AAA_3GPP_Visited_PLMN_Id);
vplmn_id := valueof(avp.avp_data.avp_AAA_3GPP_Visited_PLMN_Id);
/* compute tuple */
auth_info_content := { ts_AVP_EutranVec(1, '20080c3818183b522614162c07601d0d'O, '6a91970e838fd079'O, 'f11b89a2a8be00001f9c526f3d75d44c'O, '95AFAD9A0D29AFAA079A9451DF7161D7EE4CBF2AF9387F766D058BB6B44B905D'O) };
DIAMETER.send(ts_DIA_AIA(rx_dia.hop_by_hop_id, rx_dia.end_to_end_id,
sess_id, auth_info_content));
}
}
/* Expect UpdateLocationReq (ULR); respond with UpdateLocationAnswer (ULA) */
private altstep as_DIA_UpdLoc() runs on ConnHdlr {
var PDU_DIAMETER rx_dia;
[] DIAMETER.receive(tr_DIA_ULR(g_pars.ue_pars.imsi)) -> value rx_dia {
var template (omit) AVP avp;
var octetstring sess_id;
var hexstring imsi;
var template (value) AVP_list sub_data;
/* retrieve input data */
imsi := valueof(f_DIAMETER_get_imsi(rx_dia));
avp := f_DIAMETER_get_avp(rx_dia, c_AVP_Code_BASE_NONE_Session_Id);
sess_id := valueof(avp.avp_data.avp_BASE_NONE_Session_Id);
sub_data := {
ts_AVP_3GPP_SubscriberStatus(SERVICE_GRANTED),
ts_AVP_3GPP_SubscrRauTauTmr(30),
ts_AVP_3GPP_AMBR(1000, 2000),
ts_AVP_3GPP_ApnConfigProfile({
ts_AVP_3GPP_ContextId(1),
ts_AVP_3GPP_AllApnConfigsIncl,
ts_AVP_3GPP_ApnConfig(1, IPv4, "*")
})
};
DIAMETER.send(ts_DIA_ULA(rx_dia.hop_by_hop_id, rx_dia.end_to_end_id, sess_id, sub_data));
}
}
private function f_TC_attach(ConnHdlrPars pars) runs on ConnHdlr {
f_init_handler(pars);
var template (value) EPS_MobileIdentityV mi := ts_NAS_MobileId_IMSI(pars.ue_pars.imsi);
var template (value) PDU_NAS_EPS nas_esm, nas_emm;
/*
nas_esm := ts_NAS_ActDefEpsBearCtxReq(bearer_id := '0000'B, proc_tid := int2bit(1,8),
qos := c_NAS_defaultQoS, apn := c_NAS_defaultAPN,
addr_type := '000'B, addr_info := ''O);
*/
nas_esm := ts_NAS_PdnConnReq(bearer_id := '0000'B, proc_tid := int2bit(1,8),
pdn_type := NAS_PDN_T_IPv4, req_type := '001'B);
nas_emm := ts_NAS_AttachRequest(att_type := '000'B, kset_id := '000'B, mobile_id := mi,
ue_net_cap := c_NAS_defaultUeNetCap,
esm_enc := enc_PDU_NAS_EPS(valueof(nas_esm)));
var template (value) S1AP_PDU tx;
tx := ts_S1AP_InitialUE(p_eNB_value := 0, p_nasPdu := enc_PDU_NAS_EPS(valueof(nas_emm)),
p_tAI := ts_enb_S1AP_TAI(g_pars.enb_pars[g_pars.mme_idx]),
p_eUTRAN_CGI := ts_enb_S1AP_CGI(g_pars.enb_pars[g_pars.mme_idx]),
p_rrcCause := mo_Signalling);
S1AP.send(tx);
as_DIA_AuthInfo();
as_s1ap_handle_auth();
alt {
[] as_DIA_UpdLoc() {
as_s1ap_handle_sec_mode();
}
[] as_s1ap_handle_sec_mode() {
as_DIA_UpdLoc();
}
}
f_sleep(10.0);
}
testcase TC_s1ap_attach() runs on MTC_CT {
var charstring id := testcasename();
f_init_diameter(id);
f_sleep(10.0);
f_init_s1ap(id, 4);
f_s1ap_setup(0);
var ConnHdlrPars pars := f_init_pars(ue_idx := 0);
var ConnHdlr vc_conn;
vc_conn := f_start_handler_with_pars(refers(f_TC_attach), pars);
vc_conn.done;
}
control {
execute( TC_s1ap_setup_wrong_plmn() );
execute( TC_s1ap_setup_wrong_tac() );
execute( TC_s1ap_setup() );
execute( TC_s1ap_attach() );
}
}