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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 Native_Functions all;
import from IPL4asp_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 S1AP_PDU_Contents all;
import from S1AP_Constants 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 GTP_Emulation all;
import from GTP_Templates all;
import from GTP_CodecPort all;
import from GTPC_Types all;
import from LTE_CryptoFunctions all;
import from L3_Templates all;
import from DNS_Helpers all;
import from Osmocom_Types all;
import from Osmocom_Gb_Types all;
import from GTPv2_Types all;
import from GTPv2_Templates all;
import from GTPv2_Emulation 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;
/* Gn interface (GTPv1C) of emulated SGSN (Rel. 7) */
var GTP_Emulation_CT vc_GTP;
/* S11 interface (GTPv2C) of emulated SGW-C */
var GTPv2_Emulation_CT vc_GTP2;
port GTP2EM_PT TEID0;
var UeParams g_ue_pars[NUM_UE];
}
/* Encode an S1AP Global-ENB-ID into an octetstring */
private function enc_S1AP_Global_ENB_ID(Global_ENB_ID global_enb_id) return octetstring {
/* Due to the limitations of libfftranscode, we can not define encoders (or decoders) for individual
* information elements (in S1AP_Types.cc). Unfortuantely Global-ENB-ID also appears in BSSGP in its
* encoded form. (see also: GTP-C 3GPP TS 48.018, section 11.3.70). To encode a given Global-ENB-ID
* we craft a full S1AP PDU and encode it. Then we can cut out the encoded Global-ENB-ID from the
* generated octetstring. */
var SupportedTAs supported_tas_dummy := {{
tAC := '0000'O,
broadcastPLMNs := { '00f000'O },
iE_Extensions := omit
}};
var octetstring encoded;
var integer global_enb_id_len;
if (ispresent(global_enb_id.eNB_ID.macroENB_ID)) {
global_enb_id_len := 8;
} else {
/* All other ENB ID types fit into 8 byte (homeENB_ID, short_macroENB_ID, long_macroENB_ID) */
global_enb_id_len := 9;
}
encoded := enc_S1AP_PDU(valueof(ts_S1AP_SetupReq(global_enb_id, supported_tas_dummy, v32)));
return substr(encoded, 11, global_enb_id_len);
}
type component ConnHdlr extends S1AP_ConnHdlr, SGsAP_ConnHdlr, DIAMETER_ConnHdlr, GTP_ConnHdlr, GTP2_ConnHdlr {
var ConnHdlrPars g_pars;
timer g_Tguard := 30.0;
var GtpPeer g_gn_iface_peer := { connId := 1, remName := mp_gn_remote_ip, remPort := mp_gn_remote_port };
}
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";
/* Gn interface (GTPv1C) */
charstring mp_gn_local_ip := "127.0.0.22";
integer mp_gn_local_port := 2123;
charstring mp_gn_remote_ip := "127.0.0.2";
integer mp_gn_remote_port := 2123;
/* S11 interface (GTPv2C, interface between MME and SGW) */
charstring mp_s11_local_ip := "127.0.0.3";
integer mp_s11_local_port := 2123;
charstring mp_s11_remote_ip := "127.0.0.2";
integer mp_s11_remote_port := 2123;
}
/* 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 f_init_one_enb(charstring id, integer num := 0) runs on MTC_CT {
id := id & "-S1AP" & int2str(num);
var S1APOps ops := {
create_cb := refers(S1AP_Emulation.ExpectedCreateCallback),
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),
raw := false /* handler mode (IMSI based routing) */
};
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",
auth_app_id := omit,
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 function f_init_gtp(charstring id) runs on MTC_CT {
id := id & "-GTP";
var GtpEmulationCfg gtp_cfg := {
gtpc_bind_ip := mp_gn_local_ip,
gtpc_bind_port := mp_gn_local_port,
gtpu_bind_ip := omit,
gtpu_bind_port := omit,
sgsn_role := true
};
vc_GTP := GTP_Emulation_CT.create(id);
vc_GTP.start(GTP_Emulation.main(gtp_cfg));
}
friend function f_init_gtpv2_s11(charstring id) runs on MTC_CT {
id := id & "-GTPV2";
var Gtp2EmulationCfg cfg := {
gtpc_bind_ip := mp_s11_local_ip,
gtpc_bind_port := mp_s11_local_port,
gtpc_remote_ip := mp_s11_remote_ip,
gtpc_remote_port := mp_s11_remote_port,
sgw_role := true,
use_gtpu_daemon := false
};
vc_GTP2 := GTPv2_Emulation_CT.create(id);
map(vc_GTP2:GTP2C, system:GTP2C);
connect(vc_GTP2:TEID0, self:TEID0);
vc_GTP2.start(GTPv2_Emulation.main(cfg));
}
friend template (value) S1AP_IEs.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);
}
if (isbound(vc_GTP)) {
connect(vc_conn:GTP, vc_GTP:CLIENT);
connect(vc_conn:GTP_PROC, vc_GTP:CLIENT_PROC);
}
if (isbound(vc_GTP2)) {
connect(vc_conn:GTP2, vc_GTP2:CLIENT);
connect(vc_conn:GTP2_PROC, vc_GTP2:CLIENT_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_imsi(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 S1AP_IEs.Cause cause := omit) runs on MTC_CT {
var template (present) S1AP_IEs.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(auth_info_content, sess_id,
hbh_id := rx_dia.hop_by_hop_id,
ete_id := rx_dia.end_to_end_id));
}
}
/* 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 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);
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(sub_data, avp.avp_data.avp_BASE_NONE_Session_Id,
hbh_id := rx_dia.hop_by_hop_id,
ete_id := rx_dia.end_to_end_id));
}
}
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;
timer T := 5.0;
/*
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();
}
}
/* We now expect the MME to send a Create Session Request to the SGW-C */
/* TODO: be more restrictive, fix and use tr_GTP2C_CreateSessionReq */
f_gtp2_register_udmsg('20'O);
T.start;
alt {
[] GTP2.receive(tr_PDU_GTP2C) {
setverdict(pass);
}
[] GTP2.receive {
setverdict(fail, "unexpected GTPv2/S11 message from MME");
}
[] T.timeout {
setverdict(fail, "no message from MME");
}
}
/* TODO: Finish this procedure until Attach Complete */
}
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_init_gtpv2_s11(id);
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;
}
private function f_TC_gn_echo_request(ConnHdlrPars pars) runs on ConnHdlr {
timer T := 5.0;
f_init_handler(pars);
f_gtp_register_teid('00000000'O);
GTP.send(ts_GTPC_PING(g_gn_iface_peer, 1));
T.start;
alt {
[] GTP.receive(tr_GTPC_PONG(?)) {
setverdict(pass);
}
[] GTP.receive {
setverdict(fail, "unexpected GTPC message from MME");
}
[] T.timeout {
setverdict(fail, "no GTPC ECHO RESPONSE from MME");
}
}
}
testcase TC_gn_echo_request() runs on MTC_CT {
var charstring id := testcasename();
f_init_diameter(id);
f_init_s1ap(id, 4);
f_s1ap_setup(0);
f_init_gtp(id);
var ConnHdlrPars pars := f_init_pars(ue_idx := 0);
var ConnHdlr vc_conn;
vc_conn := f_start_handler_with_pars(refers(f_TC_gn_echo_request), pars);
vc_conn.done;
}
external function enc_PDU_GTPC_RAN_INF_REQ(in PDU_BSSGP_RAN_INFORMATION_REQUEST_GTPC gtpc_pdu) return octetstring
with { extension "prototype(convert)"
extension "encode(RAW)"
}
external function enc_PDU_GTPC_RAN_INF(in PDU_BSSGP_RAN_INFORMATION_GTPC gtpc_pdu) return octetstring
with { extension "prototype(convert)"
extension "encode(RAW)"
}
function f_convert_plmn(OCT3 pLMNidentity) return hexstring {
var hexstring pLMNidentity_hex := oct2hex(pLMNidentity);
var hexstring pLMNidentity_hex_swapped;
pLMNidentity_hex_swapped[0] := pLMNidentity_hex[1];
pLMNidentity_hex_swapped[1] := pLMNidentity_hex[0];
pLMNidentity_hex_swapped[2] := pLMNidentity_hex[3];
pLMNidentity_hex_swapped[3] := pLMNidentity_hex[2];
pLMNidentity_hex_swapped[4] := pLMNidentity_hex[5];
pLMNidentity_hex_swapped[5] := pLMNidentity_hex[4];
return pLMNidentity_hex_swapped;
}
/* Make a template for a GTPC BSSGP container that contains a RAN INFORMATION REQUEST. The template can be used to
* craft the request for the S1AP/S1-MME interface and also to verfify the contents of the coresponding request on
* the GTPC/Gn interface */
private function f_make_ts_GTPC_RAN_Information_Request(GTP_CellId geran_gtp_ci)
runs on ConnHdlr return template (value) PDU_BSSGP_RAN_INFORMATION_REQUEST_GTPC {
var template (value) RIM_Routing_Address_GTPC gtpc_dst_addr, gtpc_src_addr;
var template (value) RAN_Information_Request_RIM_Container_GTPC gtpc_rim_req_cont;
var template (value) PDU_BSSGP_RAN_INFORMATION_REQUEST_GTPC gtpc_bssgp_cont;
var octetstring gnbid;
var GTP_CellId eutran_gtp_ci;
eutran_gtp_ci.ra_id.lai.mcc_mnc := f_convert_plmn(g_pars.enb_pars[g_pars.mme_idx].global_enb_id.pLMNidentity);
gnbid := enc_S1AP_Global_ENB_ID(g_pars.enb_pars[g_pars.mme_idx].global_enb_id);
gtpc_dst_addr := t_GTPC_RIM_Routing_Address_cid(geran_gtp_ci);
gtpc_src_addr := t_GTPC_RIM_Routing_Address_enbid(eutran_gtp_ci,
oct2int(g_pars.enb_pars[g_pars.mme_idx].supported_tas[0].tAC),
gnbid);
gtpc_rim_req_cont := ts_GTPC_RAN_Information_Request_RIM_Container(
ts_GTPC_RIM_Application_Identity(RIM_APP_ID_NACC),
ts_GTPC_RIM_Sequence_Number(1),
ts_GTPC_RIM_PDU_Indications(false, RIM_PDU_TYPE_SING_REP),
ts_GTPC_RIM_Protocol_Version_Number(1),
tsu_GTPC_RAN_Information_Request_Application_Container_NACC(geran_gtp_ci),
omit);
gtpc_bssgp_cont := ts_GTPC_RAN_Information_Request(
ts_GTPC_RIM_Routing_Information(RIM_ADDR_GERAN_CELL_ID, gtpc_dst_addr),
ts_GTPC_RIM_Routing_Information(RIM_ADDR_EUTRAN_NODEB_ID, gtpc_src_addr),
gtpc_rim_req_cont);
return gtpc_bssgp_cont;
}
private function f_make_tr_GTPC_RAN_Information_Request(GTP_CellId geran_gtp_ci)
runs on ConnHdlr return template (present) PDU_BSSGP_RAN_INFORMATION_REQUEST_GTPC {
var template (present) RIM_Routing_Address_GTPC gtpc_dst_addr, gtpc_src_addr;
var template (present) RAN_Information_Request_RIM_Container_GTPC gtpc_rim_req_cont;
var template (present) PDU_BSSGP_RAN_INFORMATION_REQUEST_GTPC gtpc_bssgp_cont;
var octetstring gnbid;
var GTP_CellId eutran_gtp_ci;
eutran_gtp_ci.ra_id.lai.mcc_mnc := f_convert_plmn(g_pars.enb_pars[g_pars.mme_idx].global_enb_id.pLMNidentity);
gnbid := enc_S1AP_Global_ENB_ID(g_pars.enb_pars[g_pars.mme_idx].global_enb_id);
gtpc_dst_addr := t_GTPC_RIM_Routing_Address_cid(geran_gtp_ci);
gtpc_src_addr := t_GTPC_RIM_Routing_Address_enbid(eutran_gtp_ci,
oct2int(g_pars.enb_pars[g_pars.mme_idx].supported_tas[0].tAC),
gnbid);
gtpc_rim_req_cont := tr_GTPC_RAN_Information_Request_RIM_Container(
ts_GTPC_RIM_Application_Identity(RIM_APP_ID_NACC),
ts_GTPC_RIM_Sequence_Number(1),
ts_GTPC_RIM_PDU_Indications(false, RIM_PDU_TYPE_SING_REP),
ts_GTPC_RIM_Protocol_Version_Number(1),
tru_GTPC_RAN_Information_Request_Application_Container_NACC(geran_gtp_ci));
gtpc_bssgp_cont := tr_GTPC_RAN_Information_Request(
tr_GTPC_RIM_Routing_Information(RIM_ADDR_GERAN_CELL_ID, gtpc_dst_addr),
tr_GTPC_RIM_Routing_Information(RIM_ADDR_EUTRAN_NODEB_ID, gtpc_src_addr),
gtpc_rim_req_cont);
return gtpc_bssgp_cont;
}
/* Make initial RAN INFORMATION REQUEST message that is sent on the S1AP/S1-MME interface */
private function f_make_ts_S1AP_eNBDirectInfTrans(GTP_CellId geran_gtp_ci)
runs on ConnHdlr return template (value) S1AP_PDU {
var template (value) Inter_SystemInformationTransferType inf;
inf.rIMTransfer.rIMInformation := enc_PDU_GTPC_RAN_INF_REQ(valueof(f_make_ts_GTPC_RAN_Information_Request(geran_gtp_ci)));
inf.rIMTransfer.rIMRoutingAddress.gERAN_Cell_ID.lAI.pLMNidentity := hex2oct(f_convert_plmn(hex2oct(geran_gtp_ci.ra_id.lai.mcc_mnc)));
inf.rIMTransfer.rIMRoutingAddress.gERAN_Cell_ID.lAI.lAC := int2oct(geran_gtp_ci.ra_id.lai.lac, 2);
inf.rIMTransfer.rIMRoutingAddress.gERAN_Cell_ID.lAI.iE_Extensions := omit;
inf.rIMTransfer.rIMRoutingAddress.gERAN_Cell_ID.rAC := int2oct(geran_gtp_ci.ra_id.rac, 1);
inf.rIMTransfer.rIMRoutingAddress.gERAN_Cell_ID.cI := int2oct(geran_gtp_ci.cell_id, 2);
inf.rIMTransfer.rIMRoutingAddress.gERAN_Cell_ID.iE_Extensions := omit;
inf.rIMTransfer.iE_Extensions := omit;
return ts_S1AP_eNBDirectInfTrans(inf);
}
/* Make RAN INFORMATION (response) message that is sent on the GTPC/Gn interface */
private function f_make_ts_GTPC_RANInfoRelay(template Gtp1cUnitdata req_gtpc_pdu,
GTP_CellId geran_gtp_ci, octetstring geran_si)
runs on ConnHdlr return template (value) Gtp1cUnitdata {
var template Gtp1cUnitdata res_gtpc_pdu;
var template RAN_Information_RIM_Container_GTPC gtpc_rim_res_cont;
var template PDU_BSSGP_RAN_INFORMATION_GTPC gtpc_bssgp_rim_res_pdu;
var template RIM_Routing_Information_GTPC gtpc_rim_dst_cell_id, gtpc_rim_src_cell_id;
var template RIM_RoutingAddress gtpc_rim_ra;
var template RIM_RoutingAddress_Discriminator gtpc_rim_ra_discr;
/* Assemble GTPC RAN Information */
gtpc_rim_res_cont := ts_GTPC_RAN_Information_RIM_Container(ts_GTPC_RIM_Application_Identity(RIM_APP_ID_NACC),
ts_GTPC_RIM_Sequence_Number(2),
ts_GTPC_RIM_PDU_Indications(false, RIM_PDU_TYPE_SING_REP),
ts_GTPC_RIM_Protocol_Version_Number(1),
tsu_GTPC_ApplContainer_or_ApplErrContainer_NACC(tsu_GTPC_ApplContainer_NACC(geran_gtp_ci, false, 3, geran_si)),
omit);
/* The source becomes the destination and vice versa */
gtpc_rim_dst_cell_id := req_gtpc_pdu.gtpc.gtpc_pdu.ranInformationRelay.transparentContainer.
rANTransparentContainerField.pDU_BSSGP_RAN_INFORMATION_REQUEST.source_Cell_Identifier
gtpc_rim_src_cell_id := req_gtpc_pdu.gtpc.gtpc_pdu.ranInformationRelay.transparentContainer.
rANTransparentContainerField.pDU_BSSGP_RAN_INFORMATION_REQUEST.destination_Cell_Identifier
gtpc_bssgp_rim_res_pdu := ts_GTPC_RAN_Information(gtpc_rim_dst_cell_id,
gtpc_rim_src_cell_id,
gtpc_rim_res_cont);
/* Assemble RIM Routing Address (essentially a copy of the destination cell identifier)*/
gtpc_rim_ra := ts_RIM_RoutingAddress(enc_RIM_Routing_Address_GTPC(valueof(gtpc_rim_dst_cell_id.rIM_Routing_Address)));
gtpc_rim_ra_discr := ts_RIM_RoutingAddress_Discriminator(hex2bit(valueof(gtpc_rim_dst_cell_id.rIMRoutingAddressDiscriminator)));
res_gtpc_pdu := ts_GTPC_RANInfoRelay(g_gn_iface_peer,
ts_RANTransparentContainer_RAN_INFO(gtpc_bssgp_rim_res_pdu),
gtpc_rim_ra, gtpc_rim_ra_discr);
return res_gtpc_pdu;
}
/* Make template to verify the RAN INFORMATION REQUEST as it appears on the GTPC/Gn interface */
private function f_make_tr_GTPC_MsgType(GTP_CellId geran_gtp_ci)
runs on ConnHdlr return template (present) Gtp1cUnitdata {
var template Gtp1cUnitdata msg;
var template GTPC_PDUs pdus;
var template RANTransparentContainer ran_transp_cont;
ran_transp_cont := tr_RANTransparentContainer_RAN_INFO_REQ(
f_make_tr_GTPC_RAN_Information_Request(geran_gtp_ci));
pdus := tr_RANInfoRelay(ran_transp_cont);
msg := tr_GTPC_MsgType(g_gn_iface_peer, rANInformationRelay, '00000000'O, pdus);
return msg;
}
/* Make template to verify the RAN INFORMATION (response) as it appears on the S1AP/S1-MME interface */
private function f_make_tr_S1AP_MMEDirectInfTrans(Gtp1cUnitdata ran_information_gtpc_pdu)
runs on ConnHdlr return template (present) S1AP_PDU {
var template S1AP_PDU msg;
var template Inter_SystemInformationTransferType inf;
inf.rIMTransfer.rIMInformation := enc_PDU_GTPC_RAN_INF(
ran_information_gtpc_pdu.gtpc.gtpc_pdu.ranInformationRelay.
transparentContainer.rANTransparentContainerField.
pDU_BSSGP_RAN_INFORMATION);
inf.rIMTransfer.rIMRoutingAddress := omit;
inf.rIMTransfer.iE_Extensions := omit;
msg := tr_S1AP_MMEDirectInfTrans(inf);
return msg;
}
private function f_TC_RIM_RAN_INF(ConnHdlrPars pars) runs on ConnHdlr {
timer T := 5.0;
f_init_handler(pars);
f_gtp_register_teid('00000000'O);
var Gtp1cUnitdata req_gtpc_pdu;
var Gtp1cUnitdata resp_gtpc_pdu;
var GTP_CellId geran_gtp_ci;
/* Assemble data of a fictitiously GERAN cell */
geran_gtp_ci.ra_id.rac := oct2int('BB'O);
geran_gtp_ci.ra_id.lai.mcc_mnc := '262f42'H
geran_gtp_ci.ra_id.lai.lac := oct2int('AAAA'O);
geran_gtp_ci.cell_id := oct2int('04C7'O);
const octetstring geran_si1 := '198fb100000000000000000000000000007900002b'O;
const octetstring geran_si3 := '1b753000f110236ec9033c2747407900003c0b2b2b'O;
const octetstring geran_si13 := '009000185a6fc9e08410ab2b2b2b2b2b2b2b2b2b2b'O;
const octetstring geran_si := geran_si1 & geran_si3 & geran_si13;
/* Send initial RAN information request via S1AP to MME and expect the MME to forward the request on GTP-C
* (eNB -> MME -> SGSN) */
S1AP.send(f_make_ts_S1AP_eNBDirectInfTrans(geran_gtp_ci));
T.start;
alt {
[] GTP.receive(f_make_tr_GTPC_MsgType(geran_gtp_ci)) -> value req_gtpc_pdu {
setverdict(pass);
}
[] GTP.receive {
setverdict(fail, "unexpected GTPC message from MME");
}
[] T.timeout {
setverdict(fail, "no GTPC RAN INFORMATION REQUEST from MME");
}
}
/* Send RAN information response via GTP-C to MME and expect the MME to forward the respnse on S1AP
* (SGSN -> MME -> eNB) */
f_create_s1ap_expect_proc(id_MMEDirectInformationTransfer, self);
resp_gtpc_pdu := valueof(f_make_ts_GTPC_RANInfoRelay(req_gtpc_pdu, geran_gtp_ci, geran_si));
GTP.send(resp_gtpc_pdu);
T.start;
alt {
[] S1AP.receive(f_make_tr_S1AP_MMEDirectInfTrans(resp_gtpc_pdu)) {
setverdict(pass);
}
[] S1AP.receive {
setverdict(fail, "unexpected S1AP message from MME");
}
[] T.timeout {
setverdict(fail, "no S1AP RAN INFORMATION from MME");
}
}
setverdict(pass);
}
testcase TC_RIM_RAN_INF() runs on MTC_CT {
var charstring id := testcasename();
f_init_diameter(id);
f_init_s1ap(id, 4);
f_s1ap_setup(0);
f_init_gtp(id);
var ConnHdlrPars pars := f_init_pars(ue_idx := 0);
var ConnHdlr vc_conn;
vc_conn := f_start_handler_with_pars(refers(f_TC_RIM_RAN_INF), pars);
vc_conn.done;
}
/* Successful RESET procedure from eNB to MME */
testcase TC_s1ap_reset() runs on MTC_CT {
var charstring id := testcasename();
f_init_s1ap(id, 3);
f_s1ap_setup(0);
var template (value) S1AP_IEs.Cause reset_cause := {misc := om_intervention};
var template (value) ResetType reset_type := {s1_Interface := reset_all};
timer T := 5.0;
S1AP_UNIT[0].send(ts_S1AP_Reset(reset_cause, reset_type));
T.start;
alt {
[] S1AP_UNIT[0].receive(tr_S1AP_ResetAck_any) {
setverdict(pass);
}
[] S1AP_UNIT[0].receive {
setverdict(fail, "Received unexpected S1AP");
}
[] T.timeout {
setverdict(fail, "Timeout waiting for S1AP Setup result");
}
}
}
/* Tracking area update with a GUTI (TMSI) that is unknown to the MME. The MME is expected to reject this TAU
* request. */
private function f_TC_tau_unknown_guti(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) S1AP_PDU tx;
var template (value) PDU_NAS_EPS nas_tau;
timer T := 5.0;
var hexstring mcc_mnc := f_convert_plmn(g_pars.enb_pars[g_pars.mme_idx].global_enb_id.pLMNidentity);
var EPS_MobileIdentityLV old_guti := valueof(ts_EPS_MobileId_GUTI(mcc_mnc, '0001'O, '01'O, 'AABBCCDD'O));
nas_tau := ts_PDU_NAS_EPS_TrackingAreaUpdateRequest(old_guti);
tx := ts_S1AP_InitialUE(p_eNB_value := 0, p_nasPdu := enc_PDU_NAS_EPS(valueof(nas_tau)),
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);
T.start;
alt {
[] S1AP.receive(tr_PDU_NAS_EPS_TrackingAreaUpdateReject) {
setverdict(pass);
}
[] S1AP.receive {
setverdict(fail, "unexpected S1AP message from MME");
}
[] T.timeout {
setverdict(fail, "no message from MME");
}
}
}
testcase TC_s1ap_tau_unknown_guti() runs on MTC_CT {
var charstring id := testcasename();
f_init_diameter(id);
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_tau_unknown_guti), 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() );
execute( TC_s1ap_tau_unknown_guti() );
execute( TC_gn_echo_request() );
execute( TC_RIM_RAN_INF() );
execute( TC_s1ap_reset() );
}
}
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