module GTP_Templates { import from General_Types all; import from Osmocom_Types all; import from GTPC_Types all; import from GTPU_Types all; import from GTP_CodecPort all; import from IPCP_Types all; /* Table 38 of 3GPP TS 29.060 */ type enumerated GTP_Cause { GTP_CAUSE_REQUEST_IMEI (1), GTP_CAUSE_REQUEST_IMSI_AND_IMEI (2), GTP_CAUSE_NO_IDENTITY_NEDED (3), GTP_CAUSE_MS_REFUSES (4), GTP_CAUSE_MS_IS_NOT_GPRS_RESPONDING (5), /* reserved */ GTP_CAUSE_REQUEST_ACCEPTED (128) /* FIXME */ }; /* generalized GTP-C receive template */ template PDU_GTPC tr_GTP1C_PDU(template OCT1 msg_type, template OCT4 teid, template GTPC_PDUs pdu := ?) := { /* N-PDU Number flag (PN) shall be set to '0'. A GTP-C receiver shall not return an * error if this flag is set to '1'. */ pn_bit := '0'B, /* Sequence number flag (S) shall be set to '1'. */ s_bit := '1'B, e_bit := ?, spare := ?, /* Protocol Type flag (PT) shall be set to '1'.*/ pt := '1'B, /* Version shall be set to decimal 1 ('001'). */ version := '001'B, messageType := msg_type, lengthf := ?, teid := teid, opt_part := *, gtpc_pdu := pdu } /* generalized GTP-C send template */ template PDU_GTPC ts_GTP1C_PDU(OCT1 msg_type, OCT4 teid, GTPC_PDUs pdu, uint16_t seq_nr) := { /* N-PDU Number flag (PN) shall be set to '0'. A GTP-C receiver shall not return an * error if this flag is set to '1'. */ pn_bit := '0'B, /* Sequence number flag (S) shall be set to '1'. */ s_bit := '1'B, e_bit := '0'B, spare := '0'B, /* Protocol Type flag (PT) shall be set to '1'.*/ pt := '1'B, /* Version shall be set to decimal 1 ('001'). */ version := '001'B, messageType := msg_type, lengthf := 0, /* we assume encoder overwrites this */ teid := teid, opt_part := { sequenceNumber := int2oct(seq_nr, 2), npduNumber := '00'O, nextExtHeader := '00'O, gTPC_extensionHeader_List := omit }, gtpc_pdu := pdu } /* recovery IE */ template Recovery_gtpc ts_Recovery(OCT1 restart_counter) := { type_gtpc := '0E'O, restartCounter := restart_counter } template Recovery_gtpc tr_Recovery(template OCT1 restart_counter) := { type_gtpc := '0E'O, restartCounter := restart_counter } /* template matching reception of GTP-C echo-request */ template Gtp1cUnitdata tr_GTPC_MsgType(template GtpPeer peer, template OCT1 msg_type, template OCT4 teid, template GTPC_PDUs pdus := ?) := { peer := peer, gtpc := tr_GTP1C_PDU(msg_type, teid, pdus) } /* template matching reception of GTP-C echo-request */ template Gtp1cUnitdata tr_GTPC_PING(template GtpPeer peer) := tr_GTPC_MsgType(peer, echoRequest, '00000000'O); template GTPC_PDUs tr_EchoRespPDU(template OCT1 restart_counter) := { echoResponse := { recovery := tr_Recovery(restart_counter), private_extension_gtpc := * } } /* template matching reception of GTP-C echo-response */ template Gtp1cUnitdata tr_GTPC_PONG(template GtpPeer peer) := tr_GTPC_MsgType(peer, echoResponse, '00000000'O, tr_EchoRespPDU(?)); template GTPC_PDUs ts_EchoRespPDU(OCT1 restart_counter) := { echoResponse := { recovery := ts_Recovery(restart_counter), private_extension_gtpc := omit } } /* master template for senidng a GTP-C echo response */ template Gtp1cUnitdata ts_GTPC_PONG(GtpPeer peer, uint16_t seq, OCT1 rest_ctr) := { peer := peer, gtpc := ts_GTP1C_PDU(echoResponse, '00000000'O, valueof(ts_EchoRespPDU(rest_ctr)), seq) } template GTPC_PDUs ts_EchoReqPDU := { echoRequest := { private_extension_gtpc := omit } } /* master template for sending a GTP-C echo request */ template Gtp1cUnitdata ts_GTPC_PING(GtpPeer peer, uint16_t seq) := { peer := peer, gtpc := ts_GTP1C_PDU(echoRequest, '00000000'O, valueof(ts_EchoReqPDU), seq) } template EndUserAddress t_EuaIPv4(template OCT4 ip_addr) := { type_gtpc := '80'O, endUserAddress := { endUserAddressIPv4 := { lengthf := 2, pdp_typeorg := '0001'B, spare := '1111'B, pdp_typenum := '21'O, ipv4_address := ip_addr } } } template EndUserAddress t_EuaIPv4Dyn := t_EuaIPv4(omit); template EndUserAddress tr_EuaIPv4(template OCT4 ip_addr) modifies t_EuaIPv4 := { endUserAddress := { endUserAddressIPv4 := { lengthf := 2+lengthof(ip_addr) } } } template EndUserAddress t_EuaIPv6(template OCT16 ip_addr) := { type_gtpc := '80'O, endUserAddress := { endUserAddressIPv6 := { lengthf := 2, pdp_typeorg := '0001'B, spare := '1111'B, pdp_typenum := '57'O, ipv6_address := ip_addr } } } template EndUserAddress t_EuaIPv6Dyn := t_EuaIPv6(omit); template EndUserAddress tr_EuaIPv6(template OCT16 ip_addr) modifies t_EuaIPv6 := { endUserAddress := { endUserAddressIPv6 := { lengthf := 2+lengthof(ip_addr) } } } template AccessPointName ts_APN(octetstring apn) := { type_gtpc := '83'O, lengthf := lengthof(apn), apn_value := apn } template GSN_Address_GTPC ts_GsnAddr(octetstring ip_addr) := { type_gtpc := '85'O, lengthf := lengthof(ip_addr), addressf := ip_addr } template MSISDN ts_Msisdn(octetstring msisdn) := { type_gtpc := '86'O, lengthf := lengthof(msisdn), msisdn := msisdn } template QualityOfServiceProfile ts_QosDefault := { type_gtpc := '87'O, lengthf := 4, allocRetensionPrio := '00'O, qos_ProfileValue := { reliabilityClass := '011'B, delayClass := '001'B, spare1 := '00'B, precedenceClass := '010'B, spare2 := '0'B, peakThroughput := '1001'B, meanThroughput := '11111'B, spare3 := '000'B, deliverErroneusSDU := omit, deliveryOrder := omit, trafficClass := omit, maxSDUSize := omit, maxBitrateUplink := omit, maxBitrateDownlink := omit, sduErrorRatio := omit, residualBER := omit, trafficHandlingPriority := omit, transferDelay := omit, guaranteedBitRateUplink := omit, guaranteedBitRateDownlink := omit, sourceStatisticsDescriptor := omit, signallingIndication := omit, spare4 := omit, maxBitrateDownlinkExt := omit, guaranteedBitRateDownlinkExt := omit, maxBitrateUplinkExt := omit, guaranteedBitRateUplinkExt := omit } } template IMSI_gtpc ts_Imsi(hexstring digits) := { type_gtpc := '02'O, digits := digits, padding := 'F'H } template GTPC_PDUs ts_CreatePdpPDU(hexstring imsi, OCT1 restart_ctr, OCT4 teid_data, OCT4 teid_ctrl, BIT4 nsapi, EndUserAddress eua, octetstring apn, octetstring sgsn_ip_sign, octetstring sgsn_ip_data, octetstring msisdn, template ProtConfigOptions pco := omit) := { createPDPContextRequest := { imsi := ts_Imsi(imsi), rai := omit, recovery := ts_Recovery(restart_ctr), selectionMode := { type_gtpc := '0F'O, selectModeValue := '00'B, spare := '111111'B }, teidDataI := { type_gtpc := '00'O, teidDataI := teid_data }, teidControlPlane := { type_gtpc := '00'O, teidControlPlane := teid_ctrl }, nsapi := { type_gtpc := '00'O, nsapi := nsapi, unused := '0000'B }, linked_nsapi := omit, charging_char := omit, trace_ref := omit, trace_type := omit, endUserAddress := eua, accessPointName := ts_APN(apn), protConfigOptions := pco, sgsn_addr_signalling := ts_GsnAddr(sgsn_ip_sign), sgsn_addr_traffic := ts_GsnAddr(sgsn_ip_data), msisdn := ts_Msisdn(msisdn), qualityOfServiceProfile := ts_QosDefault, tft := omit, triggerId := omit, omcId := omit, commonFlags := omit, aPN_Restriction := omit, ratType := omit, userLocationInformation := omit, mS_TimeZone := omit, imeisv := omit, camelChargingInformationContainer := omit, additionalTraceInfo := omit, correlationID := omit, evolvedAllocationRetentionPriorityI := omit, extendedCommonFlags := omit, userCSGInformation := omit, aPN_AMBR := omit, signallingPriorityIndication := omit, cN_OperatorSelectionEntity := omit, private_extension_gtpc := omit } } template Gtp1cUnitdata ts_GTPC_CreatePDP(GtpPeer peer, uint16_t seq, hexstring imsi, OCT1 restart_ctr, OCT4 teid_data, OCT4 teid_ctrl, BIT4 nsapi, EndUserAddress eua, octetstring apn, octetstring sgsn_ip_sign, octetstring sgsn_ip_data, octetstring msisdn, template ProtConfigOptions pco := omit) := { peer := peer, gtpc := ts_GTP1C_PDU(createPDPContextRequest, '00000000'O, valueof(ts_CreatePdpPDU(imsi, restart_ctr, teid_data, teid_ctrl, nsapi, eua, apn, sgsn_ip_sign, sgsn_ip_data, msisdn, pco)), seq) } template NSAPI_GTPC ts_NSAPI(BIT4 nsapi) := { type_gtpc := '14'O, nsapi := nsapi, unused := '0000'B } template ReorderingRequired ts_ReorderReq(boolean req := false) := { type_gtpc := '08'O, reordreq := bool2bit(req), spare := '0000000'B } template GTPC_PDUs ts_CreatePdpRespPDU(OCT1 cause, OCT4 teid_data, OCT4 teid_ctrl, BIT4 nsapi, octetstring ggsn_ip_sign, octetstring ggsn_ip_data, OCT4 chg_id, template EndUserAddress eua := omit, template Recovery_gtpc recovery := omit, template ProtConfigOptions pco := omit) := { createPDPContextResponse := { cause := { '00'O, cause }, reorderingRequired := ts_ReorderReq(false), recovery := recovery, teidDataI := { type_gtpc := '00'O, teidDataI := teid_data }, teidControlPlane := { type_gtpc := '00'O, teidControlPlane := teid_ctrl }, nsapi := ts_NSAPI(nsapi), chargingID := { type_gtpc := '7F'O, chargingID := chg_id }, endUserAddress := eua, protConfigOptions := pco, ggsn_addr_controlPlane := ts_GsnAddr(ggsn_ip_sign), ggsn_addr_traffic := ts_GsnAddr(ggsn_ip_data), alt_ggsn_addr_controlPane := omit, alt_ggsn_addr_traffic := omit, qualityOfServiceProfile := ts_QosDefault, commonFlags := omit, aPN_Restriction := omit, mS_InfoChangeReportingAction := omit, bearerControlMode := omit, evolvedAllocationRetentionPriorityI := omit, extendedCommonFlag := omit, csg_information_reporting_action := omit, aPN_AMBR := omit, gGSN_BackOffTime := omit, private_extension_gtpc := omit } } template Gtp1cUnitdata ts_GTPC_CreatePdpResp(GtpPeer peer, uint16_t seq, OCT4 teid, OCT1 cause, OCT4 teid_ctrl, OCT4 teid_data, BIT4 nsapi, octetstring ggsn_ip_sign, octetstring ggsn_ip_data, OCT4 chg_id, template EndUserAddress eua := omit, template Recovery_gtpc recovery := omit, template ProtConfigOptions pco := omit) := { peer := peer, gtpc := ts_GTP1C_PDU(createPDPContextResponse, teid, valueof(ts_CreatePdpRespPDU(cause, teid_data, teid_ctrl, nsapi, ggsn_ip_sign, ggsn_ip_data, chg_id, eua, recovery, pco)), seq) } /* PCO send base template */ template ProtConfigOptions ts_PCO := { type_gtpc := '84'O, lengthf := 0, configProtocol := '000'B, spare := '0000'B, extension0 := '1'B, protocols := {} } /* PCO receive base template */ template ProtConfigOptions tr_PCO := { type_gtpc := '84'O, lengthf := ?, configProtocol := '000'B, spare := ?, extension0 := '1'B, protocols := {} } template ProtConfigOptions ts_PCO_IPv6_DNS modifies ts_PCO := { protocols := { { protocolID := '0003'O, lengthProtoID := 0, protoIDContents := ''O } } } template ProtConfigOptions tr_PCO_IPv6_DNS_resp(template OCT16 contents) modifies tr_PCO := { protocols := { *, { protocolID := '0003'O, lengthProtoID := 16, protoIDContents := contents }, * } } template ProtConfigOptions ts_PCO_IPv4_DNS_IPCP modifies ts_PCO := { protocols := { /* dummy PAP entry to check if our parser in the GGSN can properly iterate over * the list of protocols, see Change-Id Icc2e6716c33d78d3c3e000f529806228d8aa155e */ { protocolID := 'C023'O, lengthProtoID := 0, protoIDContents := ''O }, { protocolID := '8021'O, lengthProtoID := 16, protoIDContents := enc_IpcpPacket(valueof(ts_IPCP_ReqDNS)) } } } template ProtConfigOptions ts_PCO_IPv4_PRI_DNS_IPCP modifies ts_PCO := { protocols := { /* dummy PAP entry to check if our parser can cope with a single primary DNS entry * see Change-Id Icffde89f9bc5d8fcadf6e2dd6c0b4de03440edd5 and OS#3288 */ { protocolID := 'C023'O, lengthProtoID := 0, protoIDContents := ''O }, { protocolID := '8021'O, lengthProtoID := 16, protoIDContents := enc_IpcpPacket(valueof(ts_IPCP_ReqDNS_Primary)) } } } template ProtConfigOptions ts_PCO_IPv4_SEC_DNS_IPCP modifies ts_PCO := { protocols := { /* dummy PAP entry to check if our parser can cope with a single secondary DNS entry * see Change-Id Icffde89f9bc5d8fcadf6e2dd6c0b4de03440edd5 and OS#3288 */ { protocolID := 'C023'O, lengthProtoID := 0, protoIDContents := ''O }, { protocolID := '8021'O, lengthProtoID := 16, protoIDContents := enc_IpcpPacket(valueof(ts_IPCP_ReqDNS_Secondary)) } } } template ProtConfigOptions ts_PCO_IPv4_SEPARATE_DNS_IPCP modifies ts_PCO := { protocols := { /* dummy PAP entry to check if our parser can cope with a primary and secondary DNS * in separate IPCP containers OS#3381 */ { protocolID := 'C023'O, lengthProtoID := 0, protoIDContents := ''O }, { protocolID := '8021'O, lengthProtoID := 16, protoIDContents := enc_IpcpPacket(valueof(ts_IPCP_ReqDNS_Primary)) }, { protocolID := '8021'O, lengthProtoID := 16, protoIDContents := enc_IpcpPacket(valueof(ts_IPCP_ReqDNS_Secondary)) } } } template ProtocolElement tr_PCO_Proto(OCT2 prot_id) := { protocolID := prot_id, lengthProtoID := ?, protoIDContents := ? } template ProtConfigOptions tr_PCO_Contains(OCT2 prot_id) modifies tr_PCO := { protocols := { *, tr_PCO_Proto(prot_id), * } } template ProtConfigOptions ts_PCO_IPv4_DNS_CONT modifies ts_PCO := { protocols := { { protocolID := '000d'O, lengthProtoID := 0, protoIDContents := ''O } } } template ProtConfigOptions tr_PCO_IPv4_DNS_CONT_resp(template OCT4 contents) modifies tr_PCO := { protocols := { *, { protocolID := '000d'O, lengthProtoID := 4, protoIDContents := contents }, * } } /* extract a given protocol payload from PCO */ function f_PCO_extract_proto(ProtConfigOptions pco, OCT2 protocol, integer nth_match := 1) return octetstring { var integer i; var integer num_matches := 0; for (i := 0; i < lengthof(pco.protocols); i := i + 1) { if (pco.protocols[i].protocolID == protocol) { num_matches := num_matches + 1; if (num_matches == nth_match) { return pco.protocols[i].protoIDContents; } } } setverdict(fail, "Could not extract protocol payload from protocol ", protocol); mtc.stop; return ''O; } template IpcpPacket tr_IPCP(template LcpCode code, template uint8_t identifier, template IpcpOptionList opts) := { code := code, identifier := identifier, len := ?, options := opts } template IpcpOption tr_IPCP_PrimaryDns(template OCT4 addr) := { code := IPCP_OPT_PrimaryDNS, len := 6, data := addr } template IpcpOption tr_IPCP_SecondaryDns(template OCT4 addr) := { code := IPCP_OPT_SecondaryDNS, len := 6, data := addr } template IpcpPacket tr_IPCP_Ack_DNS(template uint8_t identifier := ?, template OCT4 dns1 := ?, template OCT4 dns2 := ?) := tr_IPCP(LCP_Configure_Ack, identifier, { *, tr_IPCP_PrimaryDns(dns1), *, tr_IPCP_SecondaryDns(dns2), * }); template IpcpPacket ts_IPCP(LcpCode code, uint8_t identifier, template IpcpOptionList opts) := { code := code, identifier := identifier, len := 0, /* overwritten */ options := opts } template IpcpPacket ts_IPCP_ReqDNS(uint8_t identifier := 0) := ts_IPCP(LCP_Configure_Request, identifier, { tr_IPCP_PrimaryDns('00000000'O), tr_IPCP_SecondaryDns('00000000'O) }); template IpcpPacket ts_IPCP_ReqDNS_Primary(uint8_t identifier := 0) := ts_IPCP(LCP_Configure_Request, identifier, { tr_IPCP_PrimaryDns('00000000'O) }); template IpcpPacket ts_IPCP_ReqDNS_Secondary(uint8_t identifier := 0) := ts_IPCP(LCP_Configure_Request, identifier, { tr_IPCP_SecondaryDns('00000000'O) }); function f_teardown_ind_IE(in template (omit) BIT1 ind) return template (omit) TearDownInd { if (istemplatekind(ind, "omit")) { return omit; } var TearDownInd ret := { type_gtpc := '13'O, tdInd := valueof(ind), spare:= '0000000'B } return ret; } template GTPC_PDUs ts_DeletePdpPDU(BIT4 nsapi, template (omit) BIT1 teardown_ind) := { deletePDPContextRequest := { cause := omit, tearDownIndicator := f_teardown_ind_IE(teardown_ind), nsapi := { type_gtpc := '14'O, nsapi := nsapi, unused := '0000'B }, protConfigOptions := omit, userLocationInformation := omit, mS_TimeZone := omit, extendedCommonFlags := omit, uLI_Timestamp := omit, private_extension_gtpc := omit } } template Gtp1cUnitdata ts_GTPC_DeletePDP(GtpPeer peer, uint16_t seq, OCT4 teid, BIT4 nsapi, template (omit) BIT1 teardown_ind) := { peer := peer, gtpc := ts_GTP1C_PDU(deletePDPContextRequest, teid, valueof(ts_DeletePdpPDU(nsapi, teardown_ind)), seq) } template GTPC_PDUs ts_DeletePdpRespPDU(OCT1 cause, template ProtConfigOptions pco := omit) := { deletePDPContextResponse := { cause := { '00'O, cause }, protConfigOptions := pco, userLocationInformation := omit, mS_TimeZone := omit, uLI_Timestamp := omit, private_extension_gtpc := omit } } template Gtp1cUnitdata ts_GTPC_DeletePdpResp(GtpPeer peer, uint16_t seq, OCT4 teid, OCT1 cause, template ProtConfigOptions pco := omit) := { peer := peer, gtpc := ts_GTP1C_PDU(deletePDPContextResponse, teid, valueof(ts_DeletePdpRespPDU(cause, pco)), seq) } /* GTP-U */ template PDU_GTPU tr_GTP1U_PDU(template OCT1 msg_type, template OCT4 teid, template GTPU_IEs ies := ?) := { pn_bit := ?, s_bit := ?, e_bit := ?, spare := ?, /* Protocol Type flag (PT) shall be set to '1' in GTP */ pt := '1'B, /* Version shall be set to decimal 1 ('001'). */ version := '001'B, messageType := msg_type, lengthf := ?, teid := teid, opt_part := *, gtpu_IEs := ies } function f_GTPU_s_bit(template (omit) uint16_t seq) return BIT1 { if (istemplatekind(seq, "omit")) { return '0'B; } return '1'B; } function f_GTPU_opt_part(template (omit) uint16_t seq) return template (omit) GTPU_Header_optional_part { if (istemplatekind(seq, "omit")) { return omit; } var GTPU_Header_optional_part ret := { sequenceNumber := int2oct(valueof(seq), 2), npduNumber := '00'O, nextExtHeader := '00'O, gTPU_extensionHeader_List := omit }; return ret; } /* generalized GTP-U send template */ template PDU_GTPU ts_GTP1U_PDU(OCT1 msg_type, template (omit) uint16_t seq, OCT4 teid, GTPU_IEs ies) := { /* N-PDU Number flag (PN): the GTP-U header contains a meaningful N-PDU Number field if the PN * flag is set to 1. */ pn_bit := '0'B, /* we assume the encoder overwrites this if an optional part is given */ /* If the Sequence Number flag (S) is set to '1' the sequence number field is present and * meaningful otherwise it is set to '0'. For GTP-U messages Echo Request, Echo Response, * Error Indication and Supported Extension Headers Notification, the S flag shall be set to '1'. * * Note that the caller must ensure that these conditions hold. * The caller can either pass a sequence number (we set s_bit to '1'B) when appropriate, * or may omit the sequence number (we set s_bit to '0'B). */ s_bit := f_GTPU_s_bit(seq), /* Extension header presence */ e_bit := '0'B, spare := '0'B, /* Protocol Type flag (PT) shall be set to '1' in GTP */ pt := '1'B, /* Version shall be set to decimal 1 ('001'). */ version := '001'B, messageType := msg_type, lengthf := 0, /* we assume encoder overwrites this */ teid := teid, opt_part := f_GTPU_opt_part(seq), gtpu_IEs := ies } template Gtp1uUnitdata tr_GTPU_MsgType(template GtpPeer peer, template OCT1 msg_type, template OCT4 teid) := { peer := peer, gtpu := tr_GTP1U_PDU(msg_type, teid) } /* template matching reception of GTP-U echo-request */ template Gtp1uUnitdata tr_GTPU_PING(template GtpPeer peer) := tr_GTPU_MsgType(peer, echoRequest, '00000000'O); /* template matching reception of GTP-U GPDU */ template GTPU_IEs t_GPDU(template octetstring data) := { g_PDU_IEs := { data := data } } template Gtp1uUnitdata tr_GTPU_GPDU(template GtpPeer peer, template OCT4 teid, template octetstring data := ?) := { peer := peer, gtpu := tr_GTP1U_PDU('FF'O, teid, t_GPDU(data)) } template GTPU_IEs ts_UEchoRespPDU(OCT1 restart_counter) := { echoResponse_IEs := { recovery_gtpu := { type_gtpu := '00'O, /* we assume encoder fixes? */ restartCounter := restart_counter }, private_extension_gtpu := omit } } /* master template for sending a GTP-U echo response */ template Gtp1uUnitdata ts_GTPU_PONG(GtpPeer peer, uint16_t seq, OCT1 rest_ctr) := { peer := peer, gtpu := ts_GTP1U_PDU(echoResponse, seq, '00000000'O, valueof(ts_UEchoRespPDU(rest_ctr))) } template GSNAddress_gtpu ts_UGsnAddr(octetstring ip_addr) := { type_gtpu := '85'O, lengthf := lengthof(ip_addr), gSNAddressValue := ip_addr } template TeidDataI_gtpu ts_UteidDataI(OCT4 teid) := { type_gtpu := '10'O, teidDataI := teid } template GTPU_IEs ts_UErrorIndication(OCT4 teid, octetstring gsn_addr) := { errorIndication_IEs := { teidDataI_gtpu := ts_UteidDataI(teid), gSNAddress_gtpu := ts_UGsnAddr(gsn_addr), private_extension_gtpu := omit } } /* master template for sending a GTP-U Error indication */ template Gtp1uUnitdata ts_GTPU_ErrorIndication(GtpPeer peer, uint16_t seq, OCT4 teid, octetstring gsn_addr) := { peer := peer, gtpu := ts_GTP1U_PDU('1A'O, seq, '00000000'O, valueof(ts_UErrorIndication(teid, gsn_addr))) } /* master template for sending a GTP-U user plane data */ template Gtp1uUnitdata ts_GTP1U_GPDU(GtpPeer peer, template (omit) uint16_t seq, OCT4 teid, octetstring data) := { peer := peer, gtpu := ts_GTP1U_PDU('FF'O, seq, teid, { g_PDU_IEs := { data := data }}) } }