laforge has uploaded this change for review. ( 
https://gerrit.osmocom.org/c/osmo-ttcn3-hacks/+/15204


Change subject: mme: Add GTPv2 support
......................................................................

mme: Add GTPv2 support

this includes a GTPv2_CodecPort (for the usual transcoding)
as wella as an empty GTPv2_PrivateExtensions.ttcn without which
the TITAN GTPv2 ProtocolModule won't compile.

Change-Id: I1c1b8409077103dd4e64e467d21d33d8c9c4ac95
---
A library/GTPv2_CodecPort.ttcn
A library/GTPv2_PrivateExtensions.ttcn
A library/GTPv2_Templates.ttcn
M mme/gen_links.sh
M mme/regen_makefile.sh
5 files changed, 411 insertions(+), 2 deletions(-)



  git pull ssh://gerrit.osmocom.org:29418/osmo-ttcn3-hacks 
refs/changes/04/15204/1

diff --git a/library/GTPv2_CodecPort.ttcn b/library/GTPv2_CodecPort.ttcn
new file mode 100644
index 0000000..c1f3456
--- /dev/null
+++ b/library/GTPv2_CodecPort.ttcn
@@ -0,0 +1,57 @@
+/* dual-faced port sitting on top of IPL4_asp UDP to encode/decode GTPv2C
+ * (C) 2019 Harald Welte <lafo...@gnumonks.org>
+ * All rights reserved.
+ *
+ * Released under the terms of GNU General Public License, Version 2 or
+ * (at your option) any later version.
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+
+
+module GTPv2_CodecPort {
+       import from IPL4asp_PortType all;
+       import from IPL4asp_Types all;
+       import from GTPv2C_Types all;
+
+       /* identifies a remote peer (sender or receiver) */
+       type record GtpPeer {
+               ConnectionId    connId,
+               HostName        remName,
+               PortNumber      remPort
+       }
+
+       /* Decoded GTP2C (Control Plane), used in send and receive direction */
+       type record Gtp2cUnitdata {
+               GtpPeer         peer,
+               PDU_GTPCv2      gtpc
+       }
+
+       /* Translation port on top of IPL4asp; ASP_Event passed through 
transparently */
+       type port GTPv2C_PT message {
+               out     Gtp2cUnitdata;
+               in      Gtp2cUnitdata,
+                       ASP_ConnId_ReadyToRelease,
+                       ASP_Event;
+       } with { extension "user IPL4asp_PT
+               out(Gtp2cUnitdata -> ASP_SendTo: function(f_enc_Gtp2cUD))
+               in(ASP_RecvFrom -> Gtp1cUnitdata: function(f_dec_Gtp2cUD);
+                  ASP_ConnId_ReadyToRelease -> ASP_ConnId_ReadyToRelease: 
simple;
+                  ASP_Event -> ASP_Event: simple)" }
+
+       private function f_enc_Gtp1cUD(in Gtp2cUnitdata in_ud, out ASP_SendTo 
out_ud) {
+               out_ud.connId := in_ud.peer.connId;
+               out_ud.remName := in_ud.peer.remName;
+               out_ud.remPort := in_ud.peer.remPort;
+               out_ud.proto := { udp := {} };
+               out_ud.msg := enc_PDU_GTPCv2(in_ud.gtpc);
+       } with { extension "prototype(fast)" };
+
+       private function f_dec_Gtp2cUD(in ASP_RecvFrom in_ud, out Gtp2cUnitdata 
out_ud) {
+               out_ud.peer.connId := in_ud.connId;
+               out_ud.peer.remName := in_ud.remName;
+               out_ud.peer.remPort := in_ud.remPort;
+               out_ud.gtpc := dec_PDU_GTPCv2(in_ud.msg);
+       } with { extension "prototype(fast)" };
+
+}
diff --git a/library/GTPv2_PrivateExtensions.ttcn 
b/library/GTPv2_PrivateExtensions.ttcn
new file mode 100644
index 0000000..63552f2
--- /dev/null
+++ b/library/GTPv2_PrivateExtensions.ttcn
@@ -0,0 +1,21 @@
+module GTPv2_PrivateExtensions {
+
+/* This is a small stub module to make GTPv2_Types.ttcn from
+ * titan.ProtocolModules.GTPv2_v13.7.0 compile */
+
+import from General_Types all;
+
+type record PrivateExtension {
+       OCT1            elementIdentifier,
+       LIN2_BO_LAST    lengthIndicator,
+       BIT4            instance,
+       BIT4            spare,
+       octetstring     data
+} with {
+       variant (lengthIndicator) "LENGTHTO(data)";
+       variant "PRESENCE (elementIdentifier = 'FE'O; )"
+}
+
+type record of PrivateExtension PrivateExtension_List;
+
+} with{ encode "RAW" }
diff --git a/library/GTPv2_Templates.ttcn b/library/GTPv2_Templates.ttcn
new file mode 100644
index 0000000..23b0053
--- /dev/null
+++ b/library/GTPv2_Templates.ttcn
@@ -0,0 +1,323 @@
+module GTPv2_Templates {
+
+/* (C) 2019 by Harald Welte <lafo...@gnumonks.org>
+ * All rights reserved.
+ *
+ * Released under the terms of GNU General Public License, Version 2 or
+ * (at your option) any later version.
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+
+import from General_Types all;
+import from Osmocom_Types all;
+import from GTPv2_Types all;
+
+private function fs_GTP2C_t_bit(template (omit) OCT4 teid) return BIT1 {
+       if (istemplatekind(teid, "omit")) {
+               return '0'B;
+       } else {
+               return '1'B;
+       }
+}
+
+private function fs_GTP2C_p_bit(template (omit) PDU_GTPCv2 piggyback) return 
BIT1 {
+       if (istemplatekind(piggyback, "omit")) {
+               return '0'B;
+       } else {
+               return '1'B;
+       }
+}
+
+template (present) PDU_GTPCv2 tr_PDU_GTP2C(template OCT4 teid := ?,
+                                          template (present) GTPCv2_PDUs pdus 
:= ?,
+                                          template PDU_GTPCv2 piggyback := 
omit) := {
+       spare := '000'B,
+       t_Bit := ?,
+       p_Bit := ?,
+       version := '010'B,
+       messageType := ?,
+       lengthf := ?,
+       tEID := teid,
+       sequenceNumber := ?,
+       spare3 := '00'O,
+       gtpcv2_pdu := pdus,
+       piggybackPDU_GTPCv2 := piggyback
+}
+
+
+/* 8.3 */
+template (value) IMSI ts_GTP2C_Imsi(template (value) hexstring imsi) := {
+       elementIdentifier := '01'O,
+       lengthIndicator := 0, /* overwritten */
+       instance := '0000'B,
+       spare := '0000'B,
+       iMSI_Value := imsi
+}
+template (present) IMSI tr_GTP2C_Imsi(template (present) hexstring imsi) := {
+       elementIdentifier := '01'O,
+       lengthIndicator := ?,
+       instance := ?,
+       spare := '0000'B,
+       iMSI_Value := imsi
+}
+
+/* 8.4-1 */
+/*
+type enumerated GTP2C_Cause {
+       Local_Detach                            (2),
+       Complete_Detach                         (3),
+       RAT_changed_from_3GPP_to_Non_3GPP       (4),
+       ISR_deactivation                        (5),
+       Error_Ind_from_RNC_eNB_SGSN_MME         (5),
+       IMSI_Detach_Only                        (7),
+       Reactivation_Required                   (8),
+}
+*/
+
+const integer c_GTP2C_Cause_LocalDetach := 1;
+
+/* 8.4 */
+template (value) Cause ts_GTP2C_Cause(template (value) OCT1 cause,
+                                     template (value) BIT1 cs) := {
+       elementIdentifier := '02'O,
+       lengthIndicator := 0, /* overwritten */
+       instance := '0000'B,
+       spare := '0000'B,
+       causeValue := cause,
+       cS := cs,
+       bCE := '0'B,
+       pCE := '0'B,
+       spare2 := '00000'B,
+       typeOfOffendingIE := omit,
+       lengthIndicator2 := omit,
+       instanceOfOffendingIE := omit,
+       spare3 := omit
+}
+template (present) Cause tr_GTP2C_Cause(template (present) OCT1 cause) := {
+       elementIdentifier := '02'O,
+       lengthIndicator := ?,
+       instance := ?,
+       spare := '0000'B,
+       causeValue := cause,
+       cS := ?,
+       bCE := ?,
+       pCE := ?,
+       spare2 := '00000'B,
+       typeOfOffendingIE := *,
+       lengthIndicator2 := *,
+       instanceOfOffendingIE := *,
+       spare3 := *
+}
+
+/* 8.5 */
+template (value) AccessPointName ts_GTP2C_APN(template (value) octetstring 
apn) := {
+       elementIdentifier := '48'O,
+       lengthIndicator := 0, /* overwritten */
+       instance := '0000'B,
+       spare := '0000'B,
+       aPN_Value := apn
+}
+template (present) AccessPointName tr_GTP2C_APN(template (present) octetstring 
apn) := {
+       elementIdentifier := '48'O,
+       lengthIndicator := ?,
+       instance := ?,
+       spare := '0000'B,
+       aPN_Value := apn
+}
+
+/* 8.14 */
+template (value) PDN_AddressAllocation
+ts_GTP2C_PdnAddrAlloc(template (value) BIT3 pdn_type,
+                     template (value) PDN_Address_and_Prefix addr_pfx) := {
+       elementIdentifier := '4F'O,
+       lengthIndicator := 0, /* overwritten */
+       instance := '0000'B,
+       spare := '0000'B,
+       pDN_Type := pdn_type,
+       spare2 := '00000'B,
+       pDN_Address_and_Prefix := addr_pfx
+}
+template (present) PDN_AddressAllocation
+tr_GTP2C_PdnAddrAlloc(template (present) BIT3 pdn_type,
+                     template (present) PDN_Address_and_Prefix addr_pfx) := {
+       elementIdentifier := '4F'O,
+       lengthIndicator := ?,
+       instance := ?,
+       spare := '0000'B,
+       pDN_Type := pdn_type,
+       spare2 := '00000'B,
+       pDN_Address_and_Prefix := addr_pfx
+}
+template (value) PDN_AddressAllocation
+ts_GTP2C_PdnAddrAlloc_v4(template (value) OCT4 addr) :=
+       ts_GTP2C_PdnAddrAlloc('001'B, {iPv4_Address:=addr});
+template (present) PDN_AddressAllocation
+tr_GTP2C_PdnAddrAlloc_v4(template (present) OCT4 addr) :=
+       ts_GTP2C_PdnAddrAlloc('001'B, {iPv4_Address:=addr});
+
+/* 8.17 */
+template (value) RAT_Type ts_GTP2C_RatType(template (value) integer rat) := {
+       elementIdentifier := '53'O,
+       lengthIndicator := 0, /* overwritten */
+       instance := '0000'B,
+       spare := '0000'B,
+       rAT_TypeValue := rat,
+       additionalOctets := omit
+}
+template (present) RAT_Type tr_GTP2C_RatType(template (present) integer rat) 
:= {
+       elementIdentifier := '53'O,
+       lengthIndicator := ?,
+       instance := ?,
+       spare := '0000'B,
+       rAT_TypeValue := rat,
+       additionalOctets := *
+}
+
+
+/* 8.22 */
+private function f_bit4oct(template (omit) octetstring os) return BIT1
+{
+       if (istemplatekind(os, "omit")) {
+               return '0'B;
+       } else {
+               return '1'B;
+       }
+}
+template (value) FullyQualifiedTEID
+ts_GTP2C_FTEID(integer if_type, OCT4 teid, template (omit) OCT4 v4_addr := 
omit,
+               template (omit) OCT16 v6_addr := omit) := {
+       elementIdentifier := '57'O,
+       lengthIndicator := 0, /* overwritten */
+       instance := '0000'B,
+       spare := '0000'B,
+       interfaceType := if_type,
+       v6_Flag := f_bit4oct(v4_addr),
+       v4_Flag := f_bit4oct(v6_addr),
+       tEID_GRE_Key := teid,
+       iPv4_Address := v4_addr,
+       iPv6_Address := v6_addr,
+       additionalOctets := omit
+}
+template (present) FullyQualifiedTEID
+tr_GTP2C_FTEID(template (present) integer if_type, template (present) OCT4 
teid,
+               template OCT4 v4_addr := omit,
+               template OCT16 v6_addr := omit) := {
+       elementIdentifier := '57'O,
+       lengthIndicator := ?,
+       instance := ?,
+       spare := '0000'B,
+       interfaceType := if_type,
+       v6_Flag := ?,
+       v4_Flag := ?,
+       tEID_GRE_Key := teid,
+       iPv4_Address := v4_addr,
+       iPv6_Address := v6_addr,
+       additionalOctets := omit
+}
+
+
+
+template (value) PDU_GTPCv2 ts_PDU_GTP2C(template (omit) OCT4 teid, template 
(value) OCT3 seq,
+                                        template (value) OCT1 msg_type,
+                                        template (value) GTPCv2_PDUs pdus,
+                                        template (omit) PDU_GTPCv2 piggyback 
:= omit) := {
+       spare := '000'B,
+       t_Bit := fs_GTP2C_t_bit(teid),
+       p_Bit := fs_GTP2C_p_bit(piggyback),
+       version := '010'B,
+       messageType := msg_type,
+       lengthf := 0, /* overwritten */
+       tEID := teid,
+       sequenceNumber := seq,
+       spare3 := '00'O,
+       gtpcv2_pdu := pdus,
+       piggybackPDU_GTPCv2 := piggyback
+}
+
+
+template (present) PDU_GTPCv2
+tr_GTP2C_CreateSessionReq(template (present) hexstring imsi) := 
tr_PDU_GTP2C('00000000'O, {
+       createSessionRequest := {
+               iMSI := tr_GTP2C_Imsi(imsi),
+               mSISDN := *,
+               mEI := *,
+               userLocationInfo := ?,
+               servingNetwork := ?,
+               rAT_Type := tr_GTP2C_RatType(6),
+               indication := *,
+               fullyQualifiedTEID := ?,
+               accessPointName := tr_GTP2C_APN('012a'O), // '*'
+               selectionMode := ?,
+               pDN_Type := ?,
+               pDN_AddressAllocation := ?,
+               maxAPN_Restriction := ?,
+               ambr := *,
+               linkedEPS_Bearer_ID := omit,
+               trustedWLANModeIndication := omit,
+               protocolConfigOptions := omit,
+               bearerContextGrouped := ?,
+               traceInformation := *,
+               recovery := omit,
+               csid := omit,
+               uE_TimeZone := ?,
+               user_CSG_Information := omit,
+               chargingCharacteristics := ?,
+               lDN := omit,
+               signallingPriorityIndication := *,
+               iP_Addr := omit,
+               portNumber := omit,
+               aPCO := omit,
+               trustedWLANAccessNetworkIdentifier := omit,
+               cNOperatorSelectionEntity := omit,
+               presenceReportingAreaInformation := omit,
+               overloadControlInformationGrouped := omit,
+               originationTimeStamp := *,
+               maximumWaitTime := *,
+               wLANLocationTimestamp := omit,
+               nBIFOMContainer := omit,
+               remoteUEContextGrouped := *,
+               nodeIdentifier := *,
+               extendedProtocolConfigOptions := omit,
+               servingPLMNRateControl := omit,
+               counter := omit,
+               privateExtension := omit
+       }});
+
+template (value) PDU_GTPCv2
+ts_GTP2C_CreateSessionResp(template (value) FullyQualifiedTEID_List fteids,
+                          template (value) PDN_AddressAllocation addr) :=
+ts_PDU_GTP2C('00000000'O, '000000'O, '20'O, {
+       createSessionResponse := {
+               cause := ts_GTP2C_Cause(int2oct(16, 1), '0'B),
+               changeReportingAction := omit,
+               cSG_InformationReportingAction := omit,
+               heNBInformationReporting := omit,
+               fullyQualifiedTEID := fteids,
+               pDN_AddressAllocation := addr,
+               aPN_Restriction := omit,
+               ambr := omit,
+               linkedEPS_Bearer_ID := omit,
+               protocolConfigOptions := omit,
+               bearerContextGrouped := omit,
+               recovery := omit,
+               chargingGatewayName := omit,
+               chargingGatewayAddress := omit,
+               csid := omit,
+               lDN := omit,
+               pGW_Back_OffTime := omit,
+               aPCO := omit,
+               trustedWLANIPv4Parameters := omit,
+               indicationFlags := omit,
+               presenceReportingAreaAction := omit,
+               loadControlInformationGrouped := omit,
+               overloadControlInformationGrouped := omit,
+               nBIFOMContainer := omit,
+               pDNConnectionChargingID := omit,
+               extendedProtocolConfigOptions := omit,
+               privateExtension := omit
+       }});
+
+
+
+}
diff --git a/mme/gen_links.sh b/mme/gen_links.sh
index 66effb5..5664711 100755
--- a/mme/gen_links.sh
+++ b/mme/gen_links.sh
@@ -35,6 +35,14 @@
 FILES="NAS_EPS_Types.ttcn"
 gen_links $DIR $FILES

+DIR=$BASEDIR/titan.ProtocolModules.GTPv2_v13.7.0/src
+FILES="GTPv2_Types.ttcn"
+gen_links $DIR $FILES
+
+DIR=$BASEDIR/titan.ProtocolModules.GTP_v13.5.0/src
+FILES="GTPC_EncDec.cc   GTPC_Types.ttcn  GTPU_EncDec.cc   GTPU_Types.ttcn"
+gen_links $DIR $FILES
+
 DIR=../library/s1ap
 FILES="S1AP_CommonDataTypes.asn S1AP_Constants.asn S1AP_Containers.asn 
S1AP_IEs.asn S1AP_PDU_Contents.asn
 S1AP_PDU_Descriptions.asn "
@@ -46,7 +54,7 @@
 FILES+="SGsAP_Templates.ttcn SGsAP_CodecPort.ttcn 
SGsAP_CodecPort_CtrlFunct.ttcn SGsAP_CodecPort_CtrlFunctDef.cc 
SGsAP_Emulation.ttcn DNS_Helpers.ttcn "
 FILES+="L3_Templates.ttcn "
 FILES+="S1AP_CodecPort.ttcn S1AP_CodecPort_CtrlFunctDef.cc 
S1AP_CodecPort_CtrlFunct.ttcn S1AP_Emulation.ttcn "
-FILES+="NAS_Templates.ttcn "
+FILES+="NAS_Templates.ttcn GTPv2_PrivateExtensions.ttcn GTPv2_Templates.ttcn "
 gen_links $DIR $FILES

 ignore_pp_results
diff --git a/mme/regen_makefile.sh b/mme/regen_makefile.sh
index 75fc31d..9fb5f88 100755
--- a/mme/regen_makefile.sh
+++ b/mme/regen_makefile.sh
@@ -1,6 +1,6 @@
 #!/bin/sh

-FILES="*.ttcn *.asn *.c IPL4asp_PT.cc  IPL4asp_discovery.cc  
Native_FunctionDefs.cc SGsAP_CodecPort_CtrlFunctDef.cc  
S1AP_CodecPort_CtrlFunctDef.cc  TCCConversion.cc  TCCEncoding.cc  
TCCInterface.cc  TELNETasp_PT.cc S1AP_EncDec.cc LTE_CryptoFunctionDefs.cc "
+FILES="*.ttcn *.asn *.c IPL4asp_PT.cc  IPL4asp_discovery.cc  
Native_FunctionDefs.cc SGsAP_CodecPort_CtrlFunctDef.cc  
S1AP_CodecPort_CtrlFunctDef.cc  TCCConversion.cc  TCCEncoding.cc  
TCCInterface.cc  TELNETasp_PT.cc S1AP_EncDec.cc LTE_CryptoFunctionDefs.cc 
GTPU_EncDec.cc GTPC_EncDec.cc "

 export CPPFLAGS_TTCN3=""


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Gerrit-Project: osmo-ttcn3-hacks
Gerrit-Branch: master
Gerrit-Change-Id: I1c1b8409077103dd4e64e467d21d33d8c9c4ac95
Gerrit-Change-Number: 15204
Gerrit-PatchSet: 1
Gerrit-Owner: laforge <lafo...@gnumonks.org>
Gerrit-MessageType: newchange

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