[MERGED] osmo-ttcn3-hacks[master]: ggsn: Move GTP templates to separate GTP_Templates + Add GTP...

Harald Welte gerrit-no-reply at lists.osmocom.org
Sun Feb 18 09:54:28 UTC 2018


Harald Welte has submitted this change and it was merged.

Change subject: ggsn: Move GTP templates to separate GTP_Templates + Add GTP_Emulation
......................................................................


ggsn: Move GTP templates to separate GTP_Templates + Add GTP_Emulation

Change-Id: I384e59738a9e0fc0186b69f0806f217a2a8d8a4b
---
M ggsn_tests/GGSN_Tests.ttcn
M ggsn_tests/gen_links.sh
A library/GTP_Emulation.ttcn
A library/GTP_Templates.ttcn
4 files changed, 777 insertions(+), 510 deletions(-)

Approvals:
  Harald Welte: Looks good to me, approved
  Jenkins Builder: Verified



diff --git a/ggsn_tests/GGSN_Tests.ttcn b/ggsn_tests/GGSN_Tests.ttcn
index 28f461c..f320c20 100644
--- a/ggsn_tests/GGSN_Tests.ttcn
+++ b/ggsn_tests/GGSN_Tests.ttcn
@@ -6,6 +6,7 @@
 	import from IPL4asp_Types all;
 	import from GTP_CodecPort all;
 	import from GTP_CodecPort_CtrlFunct all;
+	import from GTP_Templates all;
 	import from GTPC_Types all;
 	import from GTPU_Types all;
 	import from IPCP_Types all;
@@ -93,515 +94,6 @@
 		g_restart_ctr := f_rnd_octstring(1);
 		g_c_seq_nr := f_rnd_int(65535);
 		g_d_seq_nr := f_rnd_int(65535);
-	}
-
-	/* 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)
-	}
-
-	/* 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 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);
-		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) });
-
-	function f_teardown_ind_IE(in template BIT1 ind) return template TearDownInd {
-/*
-		if (not isvalue(ind)) {
-			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 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 BIT1 teardown_ind) := {
-		peer := peer,
-		gtpc := ts_GTP1C_PDU(deletePDPContextRequest, teid,
-					valueof(ts_DeletePdpPDU(nsapi, teardown_ind)), 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
-	}
-
-	/* generalized GTP-U send template */
-	template PDU_GTPU ts_GTP1U_PDU(OCT1 msg_type, 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'. */
-		s_bit := '1'B, 	/* we assume the encoder overwrites this if an optional part is given */
-		/* 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 :=  {
-			sequenceNumber := int2oct(seq, 2),
-			npduNumber := '00'O,
-			nextExtHeader := '00'O,
-			gTPU_extensionHeader_List := omit
-		},
-		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)))
-	}
-
-	/* master template for sending a GTP-U user plane data */
-	template Gtp1uUnitdata ts_GTP1U_GPDU(GtpPeer peer, uint16_t seq, OCT4 teid, octetstring data) := {
-		peer := peer,
-		gtpu := ts_GTP1U_PDU('FF'O, seq, teid, { g_PDU_IEs := { data := data }})
 	}
 
 	/* Altstep implementing responses to any incoming echo requests */
diff --git a/ggsn_tests/gen_links.sh b/ggsn_tests/gen_links.sh
index c04d19e..071c6c8 100755
--- a/ggsn_tests/gen_links.sh
+++ b/ggsn_tests/gen_links.sh
@@ -49,5 +49,5 @@
 
 DIR=../library
 FILES="General_Types.ttcn GSM_Types.ttcn Osmocom_Types.ttcn Native_Functions.ttcn Native_FunctionDefs.cc IPCP_Types.ttcn "
-FILES+="GTP_CodecPort.ttcn GTP_CodecPort_CtrlFunct.ttcn GTP_CodecPort_CtrlFunctDef.cc "
+FILES+="GTP_CodecPort.ttcn GTP_CodecPort_CtrlFunct.ttcn GTP_CodecPort_CtrlFunctDef.cc GTP_Templates.ttcn "
 gen_links $DIR $FILES
diff --git a/library/GTP_Emulation.ttcn b/library/GTP_Emulation.ttcn
new file mode 100644
index 0000000..e5e5e36
--- /dev/null
+++ b/library/GTP_Emulation.ttcn
@@ -0,0 +1,257 @@
+module GTP_Emulation {
+
+import from IPL4asp_Types all;
+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 GTP_CodecPort_CtrlFunct all;
+
+/***********************************************************************
+ * Main Emulation Component
+ ***********************************************************************/
+
+const integer GTP0_PORT := 3386;
+const integer GTP1C_PORT := 2123;
+const integer GTP1U_PORT := 2152;
+
+type record GtpEmulationCfg {
+	HostName gtpc_bind_ip,
+	PortNumber gtpc_bind_port,
+	HostName gtpu_bind_ip,
+	PortNumber gtpu_bind_port,
+	boolean sgsn_role
+};
+
+type component GTP_Emulation_CT {
+	/* Communication with underlying GTP CodecPort */
+	port GTPC_PT GTPC;
+	port GTPU_PT GTPU;
+
+	/* Communication with Clients */
+	port GTPEM_PT CLIENT;
+	port GTPEM_PROC_PT CLIENT_PROC;
+
+	/* Configuration by the user */
+	var GtpEmulationCfg g_gtp_cfg;
+
+	/* State */
+	var integer g_gtpc_id, g_gtpu_id;
+	var OCT1 g_restart_ctr;
+	var uint16_t g_c_seq_nr, g_u_seq_nr;
+	var TidTableRec TidTable[16];
+	var ImsiTableRec ImsiTable[16];
+};
+
+type record TidTableRec {
+	OCT4 teid,
+	GTP_ConnHdlr vc_conn
+};
+
+type record ImsiTableRec {
+	hexstring imsi,
+	GTP_ConnHdlr vc_conn
+};
+
+private function f_comp_by_teid(OCT4 teid) runs on GTP_Emulation_CT return GTP_ConnHdlr {
+	var integer i;
+	for (i := 0; i < sizeof(TidTable); i := i+1) {
+		if (isbound(TidTable[i].teid) and TidTable[i].teid == teid) {
+			return TidTable[i].vc_conn;
+		}
+	}
+	setverdict(fail, "No Component for TEID ", teid);
+	self.stop;
+}
+
+private function f_comp_by_imsi(hexstring imsi) runs on GTP_Emulation_CT return GTP_ConnHdlr {
+	var integer i;
+	for (i := 0; i < sizeof(ImsiTable); i := i+1) {
+		if (isbound(ImsiTable[i].imsi) and ImsiTable[i].imsi == imsi) {
+			return ImsiTable[i].vc_conn;
+		}
+	}
+	setverdict(fail, "No Component for IMSI ", imsi);
+	self.stop;
+}
+
+private function f_tid_tbl_add(OCT4 teid, GTP_ConnHdlr vc_conn) runs on GTP_Emulation_CT {
+	var integer i;
+	for (i := 0; i < sizeof(TidTable); i := i+1) {
+		if (not isbound(TidTable[i].teid)) {
+			TidTable[i].teid := teid;
+			TidTable[i].vc_conn := vc_conn;
+			return;
+		}
+	}
+	setverdict(fail, "No Space in TidTable for ", teid);
+	self.stop;
+}
+
+private function f_imsi_tbl_add(hexstring imsi, GTP_ConnHdlr vc_conn) runs on GTP_Emulation_CT {
+	var integer i;
+	for (i := 0; i < sizeof(ImsiTable); i := i+1) {
+		if (not isbound(ImsiTable[i].imsi)) {
+			ImsiTable[i].imsi := imsi;
+			ImsiTable[i].vc_conn := vc_conn;
+			return;
+		}
+	}
+	setverdict(fail, "No Space in IMSI Table for ", imsi);
+	self.stop;
+}
+
+function f_gtpc_extract_imsi(PDU_GTPC gtp) return template (omit) hexstring {
+	if (ischosen(gtp.gtpc_pdu.createPDPContextRequest)) {
+		return gtp.gtpc_pdu.createPDPContextRequest.imsi.digits;
+	} else if (ischosen(gtp.gtpc_pdu.updatePDPContextRequest.updatePDPContextRequestSGSN)) {
+		return gtp.gtpc_pdu.updatePDPContextRequest.updatePDPContextRequestSGSN.imsi.digits;
+	} else if (ischosen(gtp.gtpc_pdu.updatePDPContextRequest.updatePDPContextRequestGGSN)) {
+		return gtp.gtpc_pdu.updatePDPContextRequest.updatePDPContextRequestGGSN.imsi.digits;
+	} else if (ischosen(gtp.gtpc_pdu.updatePDPContextRequest.updatePDPContextRequestCGW)) {
+		return gtp.gtpc_pdu.updatePDPContextRequest.updatePDPContextRequestCGW.imsi.digits;
+	} else if (ischosen(gtp.gtpc_pdu.pdu_NotificationRequest)) {
+		return gtp.gtpc_pdu.pdu_NotificationRequest.imsi.digits;
+	} else if (ischosen(gtp.gtpc_pdu.sendRouteingInformationForGPRSRequest)) {
+		return gtp.gtpc_pdu.sendRouteingInformationForGPRSRequest.imsi.digits;
+	} else if (ischosen(gtp.gtpc_pdu.sendRouteingInformationForGPRSResponse)) {
+		return gtp.gtpc_pdu.sendRouteingInformationForGPRSResponse.imsi.digits;
+	} else if (ischosen(gtp.gtpc_pdu.failureReportRequest)) {
+		return gtp.gtpc_pdu.failureReportRequest.imsi.digits;
+	} else if (ischosen(gtp.gtpc_pdu.noteMS_GPRSPresentRequest)) {
+		return gtp.gtpc_pdu.noteMS_GPRSPresentRequest.imsi.digits;
+	} else if (ischosen(gtp.gtpc_pdu.identificationResponse) ){
+		return gtp.gtpc_pdu.identificationResponse.imsi.digits;
+	} else if (ischosen(gtp.gtpc_pdu.sgsn_ContextRequest)) {
+		return gtp.gtpc_pdu.sgsn_ContextRequest.imsi.digits;
+	} else if (ischosen(gtp.gtpc_pdu.sgsn_ContextResponse)) {
+		return gtp.gtpc_pdu.sgsn_ContextResponse.imsi.digits;
+	} else if (ischosen(gtp.gtpc_pdu.forwardRelocationRequest)) {
+		return gtp.gtpc_pdu.forwardRelocationRequest.imsi.digits;
+	} else if (ischosen(gtp.gtpc_pdu.relocationCancelRequest)) {
+		return gtp.gtpc_pdu.relocationCancelRequest.imsi.digits;
+	} else if (ischosen(gtp.gtpc_pdu.uERegistrationQueryRequest)) {
+		return gtp.gtpc_pdu.uERegistrationQueryRequest.imsi.digits;
+	} else if (ischosen(gtp.gtpc_pdu.uERegistrationQueryResponse)) {
+		return gtp.gtpc_pdu.uERegistrationQueryResponse.imsi.digits;
+	} else if (ischosen(gtp.gtpc_pdu.mBMSNotificationRequest)) {
+		return gtp.gtpc_pdu.mBMSNotificationRequest.imsi.digits;
+	} else if (ischosen(gtp.gtpc_pdu.createMBMSContextRequest)) {
+		return gtp.gtpc_pdu.createMBMSContextRequest.imsi.digits;
+	} else if (ischosen(gtp.gtpc_pdu.deleteMBMSContextRequest)) {
+		return gtp.gtpc_pdu.deleteMBMSContextRequest.imsi.digits;
+	} else if (ischosen(gtp.gtpc_pdu.mS_InfoChangeNotificationRequest)) {
+		return gtp.gtpc_pdu.mS_InfoChangeNotificationRequest.imsi.digits;
+	} else if (ischosen(gtp.gtpc_pdu.mS_InfoChangeNotificationResponse)) {
+		return gtp.gtpc_pdu.mS_InfoChangeNotificationResponse.imsi.digits;
+	} else {
+		return omit;
+	}
+}
+
+private function f_init(GtpEmulationCfg cfg) runs on GTP_Emulation_CT {
+	var Result res;
+
+	map(self:GTPC, system:GTPC);
+	res := GTP_CodecPort_CtrlFunct.f_IPL4_listen(GTPC, cfg.gtpc_bind_ip,
+						     cfg.gtpc_bind_port, {udp:={}});
+	g_gtpc_id := res.connId;
+
+	map(self:GTPU, system:GTPU);
+	res := GTP_CodecPort_CtrlFunct.f_GTPU_listen(GTPU, cfg.gtpu_bind_ip,
+						     cfg.gtpu_bind_port, {udp:={}});
+	g_gtpu_id := res.connId;
+
+	g_restart_ctr := f_rnd_octstring(1);
+	g_c_seq_nr := f_rnd_int(65535);
+	g_u_seq_nr := f_rnd_int(65535);
+	g_gtp_cfg := cfg;
+}
+
+function main(GtpEmulationCfg cfg) runs on GTP_Emulation_CT {
+	var Gtp1cUnitdata g1c_ud;
+	var Gtp1uUnitdata g1u_ud;
+	var GTP_ConnHdlr vc_conn;
+	var hexstring imsi;
+	var OCT4 teid;
+
+	f_init(cfg);
+
+	while (true) {
+	alt {
+	/* route inbound GTP-C based on IMSI or TEID */
+	[] GTPC.receive(Gtp1cUnitdata:?) -> value g1c_ud {
+		var template hexstring imsi_t := f_gtpc_extract_imsi(g1c_ud.gtpc);
+		if (isvalue(imsi_t)) {
+			vc_conn := f_comp_by_imsi(valueof(imsi_t));
+		} else {
+			vc_conn := f_comp_by_teid(g1c_ud.gtpc.teid);
+		}
+		CLIENT.send(g1c_ud) to vc_conn;
+		}
+	[] GTPU.receive(Gtp1uUnitdata:?) -> value g1u_ud {
+		vc_conn := f_comp_by_teid(g1u_ud.gtpu.teid);
+		CLIENT.send(g1u_ud) to vc_conn;
+		}
+
+	/* transparently forward any GTP-C / GTP-U from clients to peer[s] */
+	[] CLIENT.receive(Gtp1cUnitdata:?) -> value g1c_ud sender vc_conn {
+		GTPC.send(g1c_ud);
+		}
+	[] CLIENT.receive(Gtp1uUnitdata:?) -> value g1u_ud sender vc_conn {
+		GTPU.send(g1u_ud);
+		}
+
+
+	[] CLIENT_PROC.getcall(GTPEM_register_imsi:{?}) -> param(imsi) sender vc_conn {
+		f_imsi_tbl_add(imsi, vc_conn);
+		CLIENT_PROC.reply(GTPEM_register_imsi:{imsi});
+		}
+
+	[] CLIENT_PROC.getcall(GTPEM_register_teid:{?}) -> param(teid) sender vc_conn {
+		f_tid_tbl_add(teid, vc_conn);
+		CLIENT_PROC.reply(GTPEM_register_teid:{teid});
+		}
+
+	}
+	}
+}
+
+
+/***********************************************************************
+ * Interaction between Main and Client Components
+ ***********************************************************************/
+type port GTPEM_PT message {
+	inout Gtp1cUnitdata, Gtp1uUnitdata;
+} with { extension "internal" };
+
+signature GTPEM_register_imsi(hexstring imsi);
+signature GTPEM_register_teid(OCT4 teid);
+
+type port GTPEM_PROC_PT procedure {
+	inout GTPEM_register_imsi, GTPEM_register_teid;
+} with { extension "internal" };
+
+/***********************************************************************
+ * Client Compoennt
+ ***********************************************************************/
+
+type component GTP_ConnHdlr {
+	port GTPEM_PT GTP;
+	port GTPEM_PROC_PT GTP_PROC;
+};
+
+function f_gtp_register_imsi(hexstring imsi) runs on GTP_ConnHdlr {
+	GTP_PROC.call(GTPEM_register_imsi:{imsi}) {
+		[] GTP_PROC.getreply(GTPEM_register_imsi:{imsi});
+	}
+}
+
+function f_gtp_register_teid(OCT4 teid) runs on GTP_ConnHdlr {
+	GTP_PROC.call(GTPEM_register_teid:{teid}) {
+		[] GTP_PROC.getreply(GTPEM_register_teid:{teid});
+	}
+}
+
+}
diff --git a/library/GTP_Templates.ttcn b/library/GTP_Templates.ttcn
new file mode 100644
index 0000000..02a31b6
--- /dev/null
+++ b/library/GTP_Templates.ttcn
@@ -0,0 +1,518 @@
+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;
+
+	/* 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)
+	}
+
+	/* 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 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);
+		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) });
+
+	function f_teardown_ind_IE(in template BIT1 ind) return template TearDownInd {
+/*
+		if (not isvalue(ind)) {
+			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 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 BIT1 teardown_ind) := {
+		peer := peer,
+		gtpc := ts_GTP1C_PDU(deletePDPContextRequest, teid,
+					valueof(ts_DeletePdpPDU(nsapi, teardown_ind)), 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
+	}
+
+	/* generalized GTP-U send template */
+	template PDU_GTPU ts_GTP1U_PDU(OCT1 msg_type, 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'. */
+		s_bit := '1'B, 	/* we assume the encoder overwrites this if an optional part is given */
+		/* 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 :=  {
+			sequenceNumber := int2oct(seq, 2),
+			npduNumber := '00'O,
+			nextExtHeader := '00'O,
+			gTPU_extensionHeader_List := omit
+		},
+		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)))
+	}
+
+	/* master template for sending a GTP-U user plane data */
+	template Gtp1uUnitdata ts_GTP1U_GPDU(GtpPeer peer, uint16_t seq, OCT4 teid, octetstring data) := {
+		peer := peer,
+		gtpu := ts_GTP1U_PDU('FF'O, seq, teid, { g_PDU_IEs := { data := data }})
+	}
+}

-- 
To view, visit https://gerrit.osmocom.org/6567
To unsubscribe, visit https://gerrit.osmocom.org/settings

Gerrit-MessageType: merged
Gerrit-Change-Id: I384e59738a9e0fc0186b69f0806f217a2a8d8a4b
Gerrit-PatchSet: 1
Gerrit-Project: osmo-ttcn3-hacks
Gerrit-Branch: master
Gerrit-Owner: Harald Welte <laforge at gnumonks.org>
Gerrit-Reviewer: Harald Welte <laforge at gnumonks.org>
Gerrit-Reviewer: Jenkins Builder


More information about the gerrit-log mailing list