diff options
Diffstat (limited to 'mme/MME_Tests.ttcn')
| -rw-r--r-- | mme/MME_Tests.ttcn | 1102 |
1 files changed, 1067 insertions, 35 deletions
diff --git a/mme/MME_Tests.ttcn b/mme/MME_Tests.ttcn index f9bcf6d2..21ec48db 100644 --- a/mme/MME_Tests.ttcn +++ b/mme/MME_Tests.ttcn @@ -11,29 +11,44 @@ module MME_Tests { import from General_Types all; - +import from Native_Functions all; +import from IPL4asp_Types all; +import from Misc_Helpers 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_ts29_272_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 GTPC_Types all; +import from GTPv1C_CodecPort all; +import from GTPv1C_Templates 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; @@ -50,9 +65,36 @@ type record EnbParams { SupportedTAs supported_tas } +type record BearerConfig { + /* EPS Bearer ID */ + uint4_t ebi optional, + /* TEI (Data) local side, S11 (SGW) */ + OCT4 s11_teid_local optional, + /* TEI (Data) remote side, S11 (SGW) */ + OCT4 s11_teid_remote optional, + /* TEI (Data) local side, S5c (PGW) */ + OCT4 s5c_teid_local optional, + /* TEI (Data) remote side, S5c (PGW) */ + OCT4 s5c_teid_remote optional +}; + /* parameters of emulated UE */ type record UeParams { - hexstring imsi + hexstring imsi, + charstring ue_ip, + NAS_EPS_Types.GUTI guti optional, + octetstring kasme optional, + + /* TEI (Control) local side, S11 (SGW) */ + OCT4 s11_teic_local, + /* TEI (Control) remote side, S11 (SGW) */ + OCT4 s11_teic_remote optional, + /* TEI (Control) local side, S5c (PGW) */ + OCT4 s5c_teic_local, + /* TEI (Control) remote side, S5c (PGW) */ + OCT4 s5c_teic_remote optional, + + BearerConfig bearer optional } type component MTC_CT { @@ -72,12 +114,50 @@ type component MTC_CT { 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]; } -type component ConnHdlr extends S1AP_ConnHdlr, SGsAP_ConnHdlr, DIAMETER_ConnHdlr { +/* 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 Gtp1cPeer g_gn_iface_peer := { connId := 1, remName := mp_gn_remote_ip, remPort := mp_gn_remote_port }; } type record ConnHdlrPars { @@ -99,12 +179,36 @@ modulepar { /* S6 interface */ charstring mp_s6_local_ip := "127.0.0.4"; integer mp_s6_local_port := 3868; + charstring mp_s6_diam_realm := "localdomain"; + charstring mp_s6_local_diam_host := "hss.localdomain"; + charstring mp_s6_remote_diam_host := "mme.localdomain"; /* 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"; + /* RAI+CI served from emulated peer SGSN: */ + integer mp_gn_remote_port := 2123; + hexstring mp_gn_local_mcc := '262'H; + hexstring mp_gn_local_mnc := 'f42'H; + uint16_t mp_gn_local_lac := 39594; + uint8_t mp_gn_local_rac := 187; + uint16_t mp_gn_local_ci := 1223; + + /* 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; + + /* PGW information announced by SGWC. MME never really interacts with these. */ + charstring mp_s5c_pgw_ip := "1.2.3.4"; } /* send incoming unit data messages (like reset) to global SGsAP_UNIT port */ @@ -141,18 +245,10 @@ runs on S1AP_Emulation_CT return template S1AP_PDU { 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), + create_cb := refers(S1AP_Emulation.ExpectedCreateCallback), unitdata_cb := refers(S1apForwardUnitdataCallback) } var S1AP_conn_parameters pars := { @@ -191,7 +287,21 @@ friend function f_init_one_enb(charstring id, integer num := 0) runs on MTC_CT { } friend function f_init_one_ue(inout UeParams uep, integer imsi_suffix) { uep := { - imsi := f_gen_imsi(imsi_suffix) + imsi := f_gen_imsi(imsi_suffix), + ue_ip := "192.168.123.50", + guti := omit, + kasme := omit, + s11_teic_local := '00000000'O, + s11_teic_remote := omit, + s5c_teic_local := '00000000'O, + s5c_teic_remote := omit, + bearer := { + ebi := omit, + s11_teid_local := omit, + s11_teid_remote := omit, + s5c_teid_local := omit, + s5c_teid_remote := omit + } } } friend function f_init_s1ap(charstring id, integer imsi_suffix) runs on MTC_CT { @@ -213,7 +323,8 @@ runs on DIAMETER_Emulation_CT return template PDU_DIAMETER { friend function f_init_diameter(charstring id) runs on MTC_CT { var DIAMETEROps ops := { create_cb := refers(DIAMETER_Emulation.ExpectedCreateCallback), - unitdata_cb := refers(DiameterForwardUnitdataCallback) + unitdata_cb := refers(DiameterForwardUnitdataCallback), + raw := false /* handler mode (IMSI based routing) */ }; var DIAMETER_conn_parameters pars := { remote_ip := mp_mme_ip, @@ -222,6 +333,7 @@ friend function f_init_diameter(charstring id) runs on MTC_CT { 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); @@ -233,7 +345,42 @@ friend function f_init_diameter(charstring id) runs on MTC_CT { f_diameter_wait_capability(DIAMETER_UNIT); } -friend template (value) TAI ts_enb_S1AP_TAI(EnbParams enb) := { +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, + gtpu_bind_ip := omit, /* using gtpu daemon */ + gtpu_bind_port := omit, /* using gtpu daemon */ + 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 @@ -278,6 +425,14 @@ runs on MTC_CT return ConnHdlr { 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[0], vc_GTP:CLIENT); + connect(vc_conn:GTP_PROC[0], 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/ */ @@ -300,7 +455,7 @@ friend function f_init_handler(ConnHdlrPars pars, float t_guard := 30.0) runs on g_Tguard.start(t_guard); activate(as_Tguard()); if (DIAMETER_PROC.checkstate("Connected")) { - f_diameter_expect(g_pars.ue_pars.imsi); + f_diameter_expect_imsi(g_pars.ue_pars.imsi); } if (SGsAP_PROC.checkstate("Connected")) { /* Route all SGsAP mesages for our IMSIto us */ @@ -310,8 +465,8 @@ friend function f_init_handler(ConnHdlrPars pars, float t_guard := 30.0) runs on -friend function f_s1ap_setup(integer idx := 0, template Cause cause := omit) runs on MTC_CT { - var template (present) Cause exp_cause; +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")) { @@ -434,11 +589,11 @@ private altstep as_s1ap_handle_auth() runs on ConnHdlr { 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); + g_pars.ue_pars.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) + k_nas_int := f_kdf_nas_int(1, g_pars.ue_pars.kasme), + k_nas_enc := f_kdf_nas_enc(1, g_pars.ue_pars.kasme) } }; S1AP.send(cfg); @@ -447,6 +602,7 @@ private altstep as_s1ap_handle_auth() runs on ConnHdlr { } private altstep as_s1ap_handle_sec_mode() runs on ConnHdlr { + var S1APEM_Config cfg; var PDU_NAS_EPS rx_nas; var NAS_SecurityAlgorithmsV alg := { typeOfIntegrityProtection := '001'B, @@ -459,10 +615,120 @@ private altstep as_s1ap_handle_sec_mode() runs on ConnHdlr { tSC := '0'B }; [] S1AP.receive(tr_NAS_SecModeCmd(alg, kset_id, ?)) { + /* TODO: apply below integrity and ciphering based on + * Security Mode Command field "NAS security algorithms - Selected NAS security algorithms"*/ + + /* Configure integrity protection: */ + cfg := { + set_nas_alg_int := NAS_ALG_IP_EIA1 + }; + S1AP.send(cfg); + /* Configure Ciphering: */ + cfg := { + set_nas_alg_enc := NAS_ALG_ENC_EEA0 + }; + S1AP.send(cfg); + S1AP.send(ts_NAS_SecModeCmpl); } } + +private altstep as_s1ap_handle_IntialCtxSetupReq_Attach_Accept() runs on ConnHdlr { + var S1AP_PDU rx_msg; + var PDU_NAS_EPS rx_nas; + [] S1AP.receive(tr_S1AP_IntialCtxSetupReq) -> value rx_msg { + var template (omit) MME_UE_S1AP_ID mme_ue_id := f_S1AP_get_MME_UE_S1AP_ID(rx_msg); + var template (omit) ENB_UE_S1AP_ID enb_ue_id := f_S1AP_get_ENB_UE_S1AP_ID(rx_msg); + var template (value) E_RABSetupItemCtxtSURes rab_setup_it; + var template (value) E_RABSetupListCtxtSURes rab_setup_items; + var octetstring esm_enc; + var template (value) PDU_NAS_EPS nas; + var EPS_MobileIdentityTLV mi_tlv; + + S1AP.receive(tr_NAS_AttachAccept()) -> value rx_nas; + mi_tlv := rx_nas.ePS_messages.ePS_MobilityManagement.pDU_NAS_EPS_AttachAccept.gUTI; + if (mi_tlv.ePS_MobileIdentity.ePS_MobileIdentity.typeOfIdentity != '110'B) { + Misc_Helpers.f_shutdown(__BFILE__, __LINE__, fail, log2str("Rx GUTI of unexpected MI type: ", mi_tlv)); + } + g_pars.ue_pars.guti := mi_tlv.ePS_MobileIdentity.ePS_MobileIdentity.oddEvenInd_identity.guti + + rab_setup_it := ts_S1AP_RABSetupItemCtxtSURes(rab_id := 5, + tla := oct2bit(f_inet_addr(mp_mme_ip)), + gtp_teid := '00000002'O); + rab_setup_items := ts_S1AP_RABSetupListCtxtSURes(rab_setup_it); + S1AP.send(ts_S1AP_InitialCtxSetupResp(valueof(mme_ue_id), valueof(enb_ue_id), rab_setup_items)); + + nas := ts_NAS_ActDefEpsBearCtxAck(int2bit(g_pars.ue_pars.bearer.ebi, 4), '00000000'B, omit); + esm_enc := enc_PDU_NAS_EPS(valueof(nas)); + S1AP.send(ts_NAS_AttachComplete(esm_enc)); + + /* Optional from the network: */ + S1AP.receive(tr_NAS_EMMInformation); + } + [] S1AP.receive(PDU_NAS_EPS:?) -> value rx_nas { + Misc_Helpers.f_shutdown(__BFILE__, __LINE__, fail, log2str("Rx Unexpected NAS PDU msg: ", rx_nas)); + } +} + +private altstep as_s1ap_handle_IntialCtxSetupReq_TAU_Accept() runs on ConnHdlr { + var S1AP_PDU rx_msg; + var PDU_NAS_EPS rx_nas; + [] S1AP.receive(tr_S1AP_IntialCtxSetupReq) -> value rx_msg { + /* 3GPP TS 23.401 D.3.6 step 22: */ + var template (omit) MME_UE_S1AP_ID mme_ue_id := f_S1AP_get_MME_UE_S1AP_ID(rx_msg); + var template (omit) ENB_UE_S1AP_ID enb_ue_id := f_S1AP_get_ENB_UE_S1AP_ID(rx_msg); + var template (value) E_RABSetupItemCtxtSURes rab_setup_it; + var template (value) E_RABSetupListCtxtSURes rab_setup_items; + var S1APEM_Config cfg; + + S1AP.receive(tr_PDU_NAS_EPS_TrackingAreaUpdateAccept)-> value rx_nas; + + /* Configure integrity protection: */ + cfg := { + set_nas_alg_int := NAS_ALG_IP_EIA1 + }; + S1AP.send(cfg); + + rab_setup_it := ts_S1AP_RABSetupItemCtxtSURes(rab_id := 5, + tla := oct2bit(f_inet_addr(mp_mme_ip)), + gtp_teid := '00000002'O); + rab_setup_items := ts_S1AP_RABSetupListCtxtSURes(rab_setup_it); + S1AP.send(ts_S1AP_InitialCtxSetupResp(valueof(mme_ue_id), valueof(enb_ue_id), rab_setup_items)); + + /* 3GPP TS 23.401 D.3.6 step 23: */ + /* Integrity Protection and Ciphering implemented by S1AP_Emulation: */ + S1AP.send(ts_PDU_NAS_EPS_TrackingAreaUpdateComplete(c_EPS_SEC_NONE)); + } + [] S1AP.receive(PDU_NAS_EPS:?) -> value rx_nas { + Misc_Helpers.f_shutdown(__BFILE__, __LINE__, fail, log2str("Rx Unexpected NAS PDU msg: ", rx_nas)); + } +} + +private altstep as_s1ap_handle_UeContextReleaseCmd(template S1AP_IEs.Cause cause := ?) runs on ConnHdlr { + var S1AP_PDU rx_msg; + var PDU_NAS_EPS rx_nas; + [] S1AP.receive(tr_S1AP_UeContextReleaseCmd(?, cause)) -> value rx_msg { + var template MME_UE_S1AP_ID mme_ue_id; + var template ENB_UE_S1AP_ID enb_ue_id; + if (not ispresent(rx_msg.initiatingMessage.value_.uEContextReleaseCommand.protocolIEs[0].value_.uE_S1AP_IDs.uE_S1AP_ID_pair)) { + /* TODO: The UE CONTEXT RELEASE COMMAND (see also: 3GPP TS 36.413, section 9.1.4.6), may identify the + * context by either an uE_S1AP_ID_pair (MME_UE_S1AP_ID and ENB_UE_S1AP_ID) or an MME_UE_S1AP_ID alone. + * The latter case is not implemented here yet. */ + Misc_Helpers.f_shutdown(__BFILE__, __LINE__, fail, log2str("complete implementation of UeContextReleaseCmd handling")); + return; + } + + mme_ue_id := rx_msg.initiatingMessage.value_.uEContextReleaseCommand.protocolIEs[0].value_.uE_S1AP_IDs.uE_S1AP_ID_pair.mME_UE_S1AP_ID; + enb_ue_id := rx_msg.initiatingMessage.value_.uEContextReleaseCommand.protocolIEs[0].value_.uE_S1AP_IDs.uE_S1AP_ID_pair.eNB_UE_S1AP_ID; + + S1AP.send(ts_S1AP_UeContextReleaseCompl(mme_ue_id, enb_ue_id)); + } + [] S1AP.receive(PDU_NAS_EPS:?) -> value rx_nas { + Misc_Helpers.f_shutdown(__BFILE__, __LINE__, fail, log2str("Rx Unexpected NAS PDU msg: ", rx_nas)); + } +} + /* Exepect AuthInfoReq (AIR) from HSS; respond with AuthInforAnswer (AIA) */ private altstep as_DIA_AuthInfo() runs on ConnHdlr { var PDU_DIAMETER rx_dia; @@ -483,8 +749,9 @@ private altstep as_DIA_AuthInfo() runs on ConnHdlr { /* 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)); + 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)); } } @@ -493,14 +760,12 @@ 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), @@ -513,20 +778,258 @@ private altstep as_DIA_UpdLoc() runs on ConnHdlr { }) }; - DIAMETER.send(ts_DIA_ULA(rx_dia.hop_by_hop_id, rx_dia.end_to_end_id, sess_id, sub_data)); + 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 { +private function f_DIA_CancelLocation(integer idx := 0, template S1AP_IEs.Cause cause := omit) runs on ConnHdlr { - f_init_handler(pars); - var template (value) EPS_MobileIdentityV mi := ts_NAS_MobileId_IMSI(pars.ue_pars.imsi); + var UINT32 hbh_id := f_rnd_octstring(4); + var UINT32 ete_id := f_rnd_octstring(4); + var PDU_DIAMETER rx_dia; + + /* Unlike CLR, CLA contains no IMSI. Register ete_id in DIAMETER_Emulation, + * so AIA is forwarded back to us in DIAMETER port instead of MTC_CT.DIAMETER_UNIT. + */ + f_diameter_expect_eteid(ete_id); + + DIAMETER.send(ts_DIA_CLR(g_pars.ue_pars.imsi, SGSN_UPDATE_PROCEDURE, + orig_host := mp_s6_local_diam_host, + orig_realm := mp_s6_diam_realm, + dest_host := mp_s6_remote_diam_host, + dest_realm := mp_s6_diam_realm, + hbh_id := hbh_id, + ete_id := ete_id)); + + alt { + [] DIAMETER.receive(tr_DIA_CLA) -> value rx_dia {} + [] DIAMETER.receive(PDU_DIAMETER:?) -> value rx_dia { + Misc_Helpers.f_shutdown(__BFILE__, __LINE__, fail, log2str("Unexpected Diameter S6b msg rx: ", rx_dia)); + } + } +} + +private altstep as_GTP2C_CreateSession_success() runs on ConnHdlr { + var PDU_GTPCv2 rx_msg; + var BearerContextIEs rx_bctx_ies; + var template (value) FullyQualifiedTEID s11_fteid_c_ie, s11_fteid_u_ie, s5c_fteid_c_ie, s5c_fteid_u_ie; + var template (value) PDN_AddressAllocation paa; + var template (value) BearerContextIEs bctx_ies; + + [] GTP2.receive(tr_GTP2C_CreateSessionReq(g_pars.ue_pars.imsi)) -> value rx_msg { + /* Parse TEIC and Bearer EBI and TEID and store it in g_pars */ + g_pars.ue_pars.s11_teic_remote := rx_msg.gtpcv2_pdu.createSessionRequest.fullyQualifiedTEID[0].tEID_GRE_Key; + g_pars.ue_pars.s5c_teic_remote := rx_msg.gtpcv2_pdu.createSessionRequest.fullyQualifiedTEID[1].tEID_GRE_Key; + + rx_bctx_ies := rx_msg.gtpcv2_pdu.createSessionRequest.bearerContextGrouped[0].bearerContextIEs; + g_pars.ue_pars.bearer.ebi := rx_bctx_ies.ePS_Bearer_ID.ePS_Bearer_ID_Value; + + /* allocate + register TEID-C on local side */ + g_pars.ue_pars.s11_teic_local := f_gtp2_allocate_teid(); + g_pars.ue_pars.bearer.s11_teid_local := g_pars.ue_pars.s11_teic_local; + g_pars.ue_pars.s5c_teic_local := f_gtp2_allocate_teid(); + g_pars.ue_pars.bearer.s5c_teid_local := g_pars.ue_pars.s5c_teic_local; + + s11_fteid_c_ie := ts_GTP2C_FTEID(FTEID_IF_S11_MME_GTPC, g_pars.ue_pars.s11_teic_local, 0, + f_inet_addr(mp_s11_local_ip), omit); + s5c_fteid_c_ie := ts_GTP2C_FTEID(FTEID_IF_S5S8_PGW_GTPC, g_pars.ue_pars.s5c_teic_local, 1, + f_inet_addr(mp_s5c_pgw_ip), omit); + s11_fteid_u_ie := ts_GTP2C_FTEID(FTEID_IF_S1U_SGW_GTPU, g_pars.ue_pars.bearer.s11_teid_local, 0, + f_inet_addr(mp_s11_local_ip), omit); + s5c_fteid_u_ie := ts_GTP2C_FTEID(FTEID_IF_S5S8_PGW_GTPU, g_pars.ue_pars.bearer.s5c_teid_local, 2, + f_inet_addr(mp_s5c_pgw_ip), omit); + paa := ts_GTP2C_PdnAddrAlloc_v4(f_inet_addr(g_pars.ue_pars.ue_ip)); + bctx_ies := ts_GTP2C_BcContextIE(ebi := g_pars.ue_pars.bearer.ebi, + teid_list := { s11_fteid_u_ie, s5c_fteid_u_ie }, + qos := ts_GTP2C_BearerQos('09'O, 0, 0, 0, 0), + charging_id := ts_GTP2C_ChargingID(g_pars.ue_pars.bearer.s11_teid_local)); + + GTP2.send(ts_GTP2C_CreateSessionResp(g_pars.ue_pars.s11_teic_remote, + rx_msg.sequenceNumber, + Request_accepted, + { s11_fteid_c_ie, s5c_fteid_c_ie }, + paa, { ts_GTP2C_BcGrouped(bctx_ies) } )); + setverdict(pass); + } + [] GTP2.receive { + Misc_Helpers.f_shutdown(__BFILE__, __LINE__, fail, + log2str("Unexpected GTPv2/S11 message from MME")); + } +} + +private altstep as_GTP2C_ModifyBearer_success() runs on ConnHdlr { + var PDU_GTPCv2 rx_msg; + var BearerContextIEs rx_bctx_ies; + var template (value) FullyQualifiedTEID s11_fteid_c_ie, s11_fteid_u_ie, s5c_fteid_c_ie, s5c_fteid_u_ie; + var template (value) BearerContextIEs bctx_ies; + + [] GTP2.receive(tr_GTP2C_ModifyBearerReq(g_pars.ue_pars.s11_teic_local)) -> value rx_msg { + + rx_bctx_ies := rx_msg.gtpcv2_pdu.modifyBearerRequest.bearerContextGrouped[0].bearerContextIEs; + + /* TODO: validate the S1-U fullyQualifiedTEID announces the IP address provided by the ENB in InitialCtxSetupResp */ + // rx_bctx_ies.fullyQualifiedTEID[0]. == f_inet_addr(mp_mme_ip) + + /* Update S11 TEID */ + g_pars.ue_pars.bearer.s11_teid_remote := rx_bctx_ies.fullyQualifiedTEID[0].tEID_GRE_Key; + + s11_fteid_u_ie := ts_GTP2C_FTEID(FTEID_IF_S1U_SGW_GTPU, g_pars.ue_pars.bearer.s11_teid_local, 0, + f_inet_addr(mp_s11_local_ip), omit); + bctx_ies := ts_GTP2C_BcContextIE(ebi := g_pars.ue_pars.bearer.ebi, + teid_list := { s11_fteid_u_ie }, + qos := ts_GTP2C_BearerQos('09'O, 0, 0, 0, 0), + charging_id := ts_GTP2C_ChargingID(g_pars.ue_pars.bearer.s11_teid_local)); + + GTP2.send(ts_GTP2C_ModifyBearerResp(g_pars.ue_pars.s11_teic_remote, + rx_msg.sequenceNumber, + Request_accepted, + g_pars.ue_pars.bearer.ebi, + { ts_GTP2C_BcGrouped(bctx_ies) } )); + setverdict(pass); + } + [] GTP2.receive { + Misc_Helpers.f_shutdown(__BFILE__, __LINE__, fail, + log2str("Unexpected GTPv2/S11 message from MME")); + } +} + +private altstep as_GTP2C_DeleteSession_success(template Indication ind_flags := *) runs on ConnHdlr { + var PDU_GTPCv2 rx_msg; + + [] GTP2.receive(tr_GTP2C_DeleteSessionReq(g_pars.ue_pars.s11_teic_local, indicationFlags := ind_flags)) -> value rx_msg { + GTP2.send(ts_GTP2C_DeleteSessionResp(g_pars.ue_pars.s11_teic_remote, + rx_msg.sequenceNumber, + Request_accepted)); + setverdict(pass); + } + [] GTP2.receive { + Misc_Helpers.f_shutdown(__BFILE__, __LINE__, fail, + log2str("Unexpected GTPv2/S11 message from MME")); + } +} + + +/* 3GPP TS 23.401 D.3.5, TS 23.003 2.8.2.1 */ +private function guti2rai_ptmsi(in NAS_EPS_Types.GUTI guti, in OCT2 truncated_nas_token, out RoutingAreaIdentity rai, out OCT4 ptmsi, out OCT3 ptmsi_sig) runs on ConnHdlr { + var bitstring mtmsi_bits := oct2bit(guti.mTMSI); + var bitstring ptmsi_bits; + var bitstring ptmsi_sig_bits; + + rai := valueof(ts_RoutingAreaIdentity(guti.mccDigit1 & guti.mccDigit2 & guti.mccDigit3, + guti.mncDigit3 & guti.mncDigit1 & guti.mncDigit2, + guti.mMEGI, guti.mMEC)); + /* 3GPP TS 23.003 2.8.2.0: "P-TMSI shall be of 32 bits length where the two topmost bits are + * reserved and always set to '11'. Hence, for a UE which may handover to GERAN/UTRAN (based on + * subscription and UE capabilities), the corresponding bits in the M-TMSI are set to '11'" + */ + ptmsi_bits := '11'B & substr(mtmsi_bits, 2, 6) & oct2bit(guti.mMEC) & substr(mtmsi_bits, 16, 16); + ptmsi_sig_bits := substr(mtmsi_bits, 8, 8) & oct2bit(truncated_nas_token); + ptmsi := bit2oct(ptmsi_bits); + ptmsi_sig := bit2oct(ptmsi_sig_bits); + /* TODO: The UE shall fill the remaining 2 octets of the <P-TMSI signature> according to clauses 9.1.1, 9.4.1, 10.2.1, or + * 10.5.1 of 3GPP TS.33.401 [89] , as appropriate, for RAU/Attach procedures.*/ +} + +/* Test UE attached to EUTRAN reselecting a GERAN cell. In this scenario, the + * new SGSN will attempt to obtain information of the UE from the old SGSN (MME) + * through Gn interface using SGSN Context Request/Response procedure (OS#6294). */ +private function f_gtp_sgsn_context_4g_to_2g(OCT4 new_sgsn_local_teid := '12345678'O) runs on ConnHdlr { + var template (value) GTPC_PDUs SGSNContextReqPDU; + var RoutingAreaIdentity rai; + var OCT4 ptmsi; + var OCT3 ptmsi_sig; + var Gtp1cUnitdata gtpc_pdu; + var OCT4 old_mme_local_teid; + var uint16_t gtpc_seq_nr := f_rnd_int(65535); + + /* Derive NAS Token (and post-increment ul_count): */ + var OCT32 nas_token := f_s1apem_derive_nas_token(g_pars.ue_pars.kasme); + var OCT2 truncated_nas_token := substr(nas_token, 30, 2); + + guti2rai_ptmsi(g_pars.ue_pars.guti, truncated_nas_token, rai, ptmsi, ptmsi_sig); + + SGSNContextReqPDU := ts_SGSNContextReqPDU(rai, new_sgsn_local_teid, f_inet_addr(mp_gn_local_ip), + ptmsi := ts_PTMSI(ptmsi), ptmsi_sig := ts_PTMSI_sig(ptmsi_sig)); + GTP[0].send(ts_GTPC_SGSNContextReq(g_gn_iface_peer, gtpc_seq_nr, SGSNContextReqPDU)); + + timer T := 5.0; + T.start; + alt { + [] GTP[0].receive(tr_GTPC_SGSNContextResp(g_gn_iface_peer, new_sgsn_local_teid, + tr_SGSNContextRespPDU(GTP_CAUSE_REQUEST_ACCEPTED, + g_pars.ue_pars.imsi))) -> value gtpc_pdu { + old_mme_local_teid := gtpc_pdu.gtpc.gtpc_pdu.sgsn_ContextResponse.teidControlPlane.teidControlPlane; + setverdict(pass); + } + [] GTP[0].receive { + Misc_Helpers.f_shutdown(__BFILE__, __LINE__, fail, log2str("unexpected GTPC message from MME")); + } + [] T.timeout { + Misc_Helpers.f_shutdown(__BFILE__, __LINE__, fail, log2str("no SGSN Context Response from MME")); + } + } + + GTP[0].send(ts_GTPC_SGSNContextAck(g_gn_iface_peer, old_mme_local_teid, + oct2int(gtpc_pdu.gtpc.opt_part.sequenceNumber), + ts_SGSNContextAckPDU(GTP_CAUSE_REQUEST_ACCEPTED))); + +} + +private altstep as_gtp_sgsn_context_2g_to_4g(OCT4 new_sgsn_teid := 'ABABABAB'O, GTPv1C_Templates.GTP_RATType rat_type := GTP_RAT_TYPE_EUTRAN, + RoutingAreaIdentity rai, + OCT4 ptmsi, + OCT3 ptmsi_sig, + boolean exp_auth := false +) runs on ConnHdlr { + var Gtp1cUnitdata gtpc_pdu; + + [] GTP[0].receive(tr_GTPC_SGSNContextReq(g_gn_iface_peer, tr_SGSNContextReqPDU(rai := rai, ptmsi := ts_PTMSI(ptmsi), ptmsi_sig := ts_PTMSI_sig(ptmsi_sig), rat_type := int2oct(enum2int(rat_type), 1)))) -> value gtpc_pdu { + var template (value) PDP_Context_GTPC pdp_ctx; + var template (value) GTPC_PDUs SGSNContextRespPDU; + var Gtp1cUnitdata gtpc_pdu_ack; + var OCT4 old_mme_remote_teid := gtpc_pdu.gtpc.gtpc_pdu.sgsn_ContextRequest.teidControlPlane.teidControlPlane; + + const OCT16 ck := '740d62df9803eebde5120acf358433d0'O; + const OCT16 ik := '11329aae8e8d2941bb226b2061137c58'O; + + pdp_ctx := ts_PDP_Context_GTPC(f_inet_addr(g_pars.ue_pars.ue_ip), + f_inet_addr(mp_gn_local_ip), + c_NAS_defaultAPN, + ggsn_teic := '12345678'O, + ggsn_teid := '87654321'O); + SGSNContextRespPDU := ts_SGSNContextRespPDU(GTP_CAUSE_REQUEST_ACCEPTED, + g_pars.ue_pars.imsi, + new_sgsn_teid, + f_inet_addr(mp_gn_local_ip), + ts_MM_ContextUMTS(ck, ik), + { pdp_ctx }); + GTP[0].send(ts_GTPC_SGSNContextResp(g_gn_iface_peer, + old_mme_remote_teid, + oct2int(gtpc_pdu.gtpc.opt_part.sequenceNumber), + SGSNContextRespPDU)); + + if (exp_auth) { + as_DIA_AuthInfo(); + as_s1ap_handle_auth(); + as_s1ap_handle_sec_mode(); + } + + GTP[0].receive(tr_GTPC_SGSNContextAck(g_gn_iface_peer, new_sgsn_teid, + tr_SGSNContextAckPDU(GTP_CAUSE_REQUEST_ACCEPTED))) -> value gtpc_pdu; + setverdict(pass); + } + [] GTP[0].receive { + setverdict(fail, "unexpected GTPC message from MME"); + } +} + +private function f_attach() runs on ConnHdlr { + var template (value) EPS_MobileIdentityV mi := ts_NAS_MobileId_IMSI(g_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); -*/ + timer T := 5.0; + 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, @@ -550,7 +1053,32 @@ private function f_TC_attach(ConnHdlrPars pars) runs on ConnHdlr { } } - f_sleep(10.0); + /* We now expect the MME to send a Create Session Request to the SGW-C */ + f_gtp2_register_udmsg('20'O); + T.start; + alt { + [] as_GTP2C_CreateSession_success(); + [] T.timeout { Misc_Helpers.f_shutdown(__BFILE__, __LINE__, fail, log2str("No message from MME")); } + } + + T.start; + alt { + [] as_s1ap_handle_IntialCtxSetupReq_Attach_Accept(); + [] T.timeout { Misc_Helpers.f_shutdown(__BFILE__, __LINE__, fail, log2str("No message from MME")); } + } + + /* We now expect the MME to send a Modify Bearer Request to the SGW-C */ + f_gtp2_register_udmsg('22'O); + T.start; + alt { + [] as_GTP2C_ModifyBearer_success(); + [] T.timeout { Misc_Helpers.f_shutdown(__BFILE__, __LINE__, fail, log2str("No message from MME")); } + } +} + +private function f_TC_attach(ConnHdlrPars pars) runs on ConnHdlr { + f_init_handler(pars); + f_attach(); } testcase TC_s1ap_attach() runs on MTC_CT { var charstring id := testcasename(); @@ -558,6 +1086,7 @@ testcase TC_s1ap_attach() runs on MTC_CT { 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); @@ -566,11 +1095,514 @@ testcase TC_s1ap_attach() runs on MTC_CT { 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[0].send(ts_GTPC_PING(g_gn_iface_peer, 1)); + T.start; + alt { + [] GTP[0].receive(tr_GTPC_PONG(?)) { + setverdict(pass); + } + [] GTP[0].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, 0); + 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 := mp_gn_local_rac; + geran_gtp_ci.ra_id.lai.mcc_mnc := mp_gn_local_mcc & mp_gn_local_mnc; + geran_gtp_ci.ra_id.lai.lac := mp_gn_local_lac; + geran_gtp_ci.cell_id := mp_gn_local_ci; + 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[0].receive(f_make_tr_GTPC_MsgType(geran_gtp_ci)) -> value req_gtpc_pdu { + setverdict(pass); + } + [] GTP[0].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[0].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, 0); + 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, 0); + 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"); + } + } + + as_s1ap_handle_UeContextReleaseCmd(); +} +testcase TC_s1ap_tau_unknown_guti() runs on MTC_CT { + var charstring id := testcasename(); + + f_init_diameter(id); + f_init_s1ap(id, 5); + 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; +} + +private function f_TC_ue_cell_reselect_eutran_to_geran(ConnHdlrPars pars) runs on ConnHdlr { + f_init_handler(pars); + f_gtp_register_imsi(g_pars.ue_pars.imsi); + f_attach(); + + /* TS 23.401 Figure D.3.5-1 Steps 1,2,3,4: */ + f_gtp_sgsn_context_4g_to_2g(); + + /* TS 23.401 Figure D.3.5-1 Step 8: */ + f_DIA_CancelLocation(); + + + /* TS 23.401 Figure D.3.5-1 Step 13: + * After Gn timer triggers, the SGW session is deleted. + * Make sure Operation Indication is set to 0, to tell the SGW to keep the Session up at the PGW. + */ + as_GTP2C_DeleteSession_success(tr_GTP2C_Indication(oI := '0'B)); + + /* TS 23.401 Figure D.3.5-1 Step 13: + * Upon rx of SGSN Context Acknowledge, MME released the ENB/UE context: + */ + as_s1ap_handle_UeContextReleaseCmd(); + + /* Let MME some time to handle the Create Session Response: */ + f_sleep(3.0); +} +testcase TC_ue_cell_reselect_eutran_to_geran() runs on MTC_CT { + var charstring id := testcasename(); + + f_init_diameter(id); + f_init_s1ap(id, 6); + f_init_gtpv2_s11(id); + 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_ue_cell_reselect_eutran_to_geran), pars); + vc_conn.done; +} + +/* 3GPP TS 23.401 D.3.6, TS 23.003 2.8.2.2.2 (Mapping in the UE) */ +private function rai_ptmsi2_guti(in RoutingAreaIdentity rai, in OCT4 ptmsi, out NAS_EPS_Types.GUTI guti) { + + + var bitstring ptmsi_bits := oct2bit(ptmsi); + var bitstring rac_bits := oct2bit(rai.rac); + var bitstring mtmsi_bits := '11'B & + substr(ptmsi_bits, 2, 6) & + substr(rac_bits, 0, 8) & + substr(ptmsi_bits, 16, 16); + guti := valueof(ts_NAS_GUTI(mcc_mnc := rai.mcc_digits & rai.mnc_digits, + mmegi := rai.lac, + mmec := bit2oct(substr(ptmsi_bits, 8, 8)), + tmsi := bit2oct(mtmsi_bits))); +} +/* Test UE attached to GERAN reselecting a EUTRAN cell. In this scenario, the + * new MME will attempt to obtain information of the UE from the old SGSN + * through Gn interface using SGSN Context Request/Response procedure (OS#6294). */ +/* 3GPP TS 23.401 D.3.6, TS 23.003 2.8.2.2.2 */ +private function f_TC_ue_cell_reselect_geran_to_eutran(ConnHdlrPars pars) runs on ConnHdlr { + f_init_handler(pars); + f_gtp_register_imsi(g_pars.ue_pars.imsi); + f_gtp2_register_imsi(g_pars.ue_pars.imsi); + /* SGSN Context Req doesn't necessarily contain IMSI, hence expect it through TEID=0 */ + f_gtp_register_teid('00000000'O); + /* passed in SGSN Context Resp to MME, will be used by MME when answering with SGSN Context Ack: */ + const OCT4 new_sgsn_teid := 'ABABABAB'O; + f_gtp_register_teid(new_sgsn_teid); + + 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; + var RoutingAreaIdentity rai; + var OCT4 ptmsi := f_gen_tmsi(suffix := 0, nri_v := 0, nri_bitlen := 8); + var OCT3 ptmsi_sig := f_rnd_octstring(3); + var NAS_EPS_Types.GUTI guti_val; + var template (value) EPS_MobileIdentityLV old_guti; + var S1APEM_Config cfg; + timer T := 5.0; + var bitstring ptmsi_bits := oct2bit(ptmsi); + var OCT4 ptmsi_exp := bit2oct('11'B & substr(ptmsi_bits, 2, 30)); + var template (value) UENetworkCapabilityTLV ue_net_cap := ts_UENetworkCapabilityTLV(c_NAS_defaultUeNetCap); + + rai := valueof(ts_RoutingAreaIdentity(mp_gn_local_mcc, mp_gn_local_mnc, + int2oct(mp_gn_local_lac, 2), int2oct(mp_gn_local_rac, 1))); + rai_ptmsi2_guti(rai, ptmsi, guti_val); + old_guti := ts_EPS_MobileId_GUTI_(guti_val); + + nas_tau := ts_PDU_NAS_EPS_TrackingAreaUpdateRequest(old_guti, + ts_PTMSI_SignatureTV(ptmsi_sig), + ts_GUTI_TypeTV(GUTI_TYPE_MAPPED), + ts_NonceTV('12345678'O), + ts_CipheringKeySequenceNumberTV('000'B), + ue_net_cap := ue_net_cap); + 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); + + /* NAS counts are reset to zero when a mapped security context is created. */ + cfg := { + reset_nas_counts := {} + }; + S1AP.send(cfg); + + as_gtp_sgsn_context_2g_to_4g(new_sgsn_teid, GTP_RAT_TYPE_EUTRAN, rai, ptmsi_exp, ptmsi_sig, exp_auth := true); + + /* We now expect the MME to send a Create Session Request to the SGW-C */ + T.start; + alt { + [] as_GTP2C_CreateSession_success(); + [] T.timeout { Misc_Helpers.f_shutdown(__BFILE__, __LINE__, fail, log2str("No message from MME")); } + } + + /* 3GPP TS 23.401 D.3.6 steps 14-21: */ + as_DIA_UpdLoc(); + + /* 3GPP TS 23.401 D.3.6 step 22, 23: */ + as_s1ap_handle_IntialCtxSetupReq_TAU_Accept(); + + /* We now expect the MME to send a Modify Bearer Request to the SGW-C */ + T.start; + alt { + [] as_GTP2C_ModifyBearer_success(); + [] T.timeout { Misc_Helpers.f_shutdown(__BFILE__, __LINE__, fail, log2str("No message from MME")); } + } + + /* Leave some time for MME to handle Modify Bearer Response: */ + f_sleep(1.0); +} +testcase TC_ue_cell_reselect_geran_to_eutran() runs on MTC_CT { + var charstring id := testcasename(); + + f_init_diameter(id); + f_init_s1ap(id, 7); + f_init_gtpv2_s11(id); + 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_ue_cell_reselect_geran_to_eutran), 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() ); + execute( TC_ue_cell_reselect_eutran_to_geran() ); + execute( TC_ue_cell_reselect_geran_to_eutran() ); } |