Add basic E1 functionality

With contributions from * Sakthivel Velumani <velumani@eurecom.fr> * Robert Schmidt <robert.schmidt@openairinterface.org> Squashed commit of the following: commit e8488acbcdaef6ee1688dc233c9e48e85b0fbfc8 Merge: f09468eb13 5d58645a85 Author: laurent <laurent Thomas> Date: Sat Jan 21 15:03:40 2023 +0100 merge develop commit f09468eb13f729c49830786150918b03ae2d7524 Author: laurent <laurent Thomas> Date: Fri Jan 20 10:43:51 2023 +0100 continue e1AP development commit 76545cfbfc7ec5031633b1b0ec599c3560c1e5a7 Author: laurent <laurent Thomas> Date: Wed Jan 18 14:18:47 2023 +0100 fix regressions after merge develop commit 7071c480a6c433eb94501c49f4a7694ba77f4f6d Merge: 569b9fc5f3 214aa50595 Author: laurent <laurent Thomas> Date: Mon Jan 16 15:51:50 2023 +0100 merge develop commit 569b9fc5f37b9947b722885e423572a211d658da Author: laurent <laurent Thomas> Date: Wed Jan 4 17:07:01 2023 +0100 fix srb2 addition, simplify and remove dead code, fix one race commit 9fa89151c0f9b4a16a79d0685cc04d8cf2adfa44 Author: Sakthivel Velumani <velumani@eurecom.fr> Date: Wed Jan 4 20:02:05 2023 +0530 Bearer context release decoder and encoder commit 7011cb518ed6df015ace536e9a08b2d1865188d9 Author: Sakthivel Velumani <velumani@eurecom.fr> Date: Wed Jan 4 13:43:58 2023 +0530 Update documentation commit 3e8899fc962cb16fc1ded49590ca5dddede54978 Author: Sakthivel Velumani <velumani@eurecom.fr> Date: Wed Jan 4 10:14:11 2023 +0530 Fix function arguments and warnings commit 989ad183a8d66961facaa6719fa7793b9d40d5b4 Author: Sakthivel Velumani <velumani@eurecom.fr> Date: Tue Jan 3 20:18:31 2023 +0530 Moved E1-design.md to doc/ commit 04a8633dd509d9525755c5f3abfad976a1ba704e Author: Sakthivel Velumani <velumani@eurecom.fr> Date: Tue Jan 3 20:13:46 2023 +0530 Make libraries lower case in CMakeLists commit 033ec174c1f48a0e745a2a2e1c367aa361f5ae76 Author: Sakthivel Velumani <velumani@eurecom.fr> Date: Tue Jan 3 17:55:25 2023 +0530 Renamed and updated cucp cuup config files commit f76a6913352bd8b2bb73ac25f225140cf05f93f2 Author: Sakthivel Velumani <velumani@eurecom.fr> Date: Tue Jan 3 13:31:19 2023 +0530 Removed CU-UP checks from nr-softmodem commit ae70afe44c84ac16b977b388c63e80e24803c43c Author: laurent <laurent Thomas> Date: Mon Jan 2 13:01:45 2023 +0100 fix for gcc version hat doesnt accept declarations in switch commit 6a7a01043bf1e6e0ee9ac40b4d85ced7cdf6dcf4 Author: laurent <laurent Thomas> Date: Tue Dec 27 15:59:28 2022 +0100 first functional commit standalone cu-up commit 0caa4690f9e1acbe578d4de5a82ba62f45444a12 Merge: 3619f9550e 1a0c0cd1c9 Author: Sakthivel Velumani <velumani@eurecom.fr> Date: Fri Dec 23 14:21:00 2022 +0530 Merge remote-tracking branch 'origin/develop' into e1-implementation-wip commit 3619f9550e4d3e78815334150ff8443db914f738 Merge: 1bcf8d5e00 cfe698eb70 Author: Sakthivel Velumani <velumani@eurecom.fr> Date: Wed Dec 21 15:47:40 2022 +0530 Merge remote-tracking branch 'origin/develop' into e1-implementation-wip commit 1bcf8d5e00a9b9ce440d825f83ddc1b48086daa8 Author: Sakthivel Velumani <velumani@eurecom.fr> Date: Tue Sep 13 02:10:34 2022 -0400 Fix GTP rnti to ue_id after rebase commit 23075ff8b7ef5d56df844c05e0a7100fe7bd35de Author: Sakthivel Velumani <velumani@eurecom.fr> Date: Tue Sep 6 00:32:12 2022 -0400 Added documentation commit 28f6e507f74d3fb069441e05da523378dee0f6ed Author: Sakthivel Velumani <velumani@eurecom.fr> Date: Mon Sep 5 15:02:02 2022 -0400 Header cleaups and unitary simulators build fixes commit e665dbab28c49327066cff72aed22e1de7797b59 Author: Sakthivel Velumani <velumani@eurecom.fr> Date: Thu Sep 1 17:52:07 2022 -0400 Common interface between CUCP & CUUP for E1 and non E1 modes commit 5dcc1bf59a37ed87d7d32a617cfcd663d6415757 Author: Sakthivel Velumani <velumani@eurecom.fr> Date: Thu Sep 1 13:53:49 2022 -0400 Allocate stack where ever possible Free memory after ASN encode commit 793a5379539a3a2b6c42cd327d8cef79fe21fb55 Author: Sakthivel Velumani <velumani@eurecom.fr> Date: Thu Sep 1 10:41:50 2022 -0400 Fixes for build issues commit 0d3564f25a0d8746b0fc550ed371ce21e08cd05a Author: Sakthivel Velumani <velumani@eurecom.fr> Date: Wed Aug 31 20:57:14 2022 -0400 Fixed uesoftmodem linkage error commit 34adf865820f09900a5efed693ada1ccf6f0f1ad Author: Sakthivel Velumani <velumani@eurecom.fr> Date: Wed Aug 31 19:31:50 2022 -0400 Removed RRC thread from CUUP commit 536741910aff90a86ba3a60612f943b412c5ab40 Author: Sakthivel Velumani <velumani@eurecom.fr> Date: Wed Aug 31 14:21:31 2022 -0400 Add header guard in one of E1AP header commit 22e9d9b6dea5d84d259ee2dc1aaa7cb943e55b08 Author: Sakthivel Velumani <velumani@eurecom.fr> Date: Wed Aug 31 14:00:47 2022 -0400 Fix bug in PDCP ue_id commit 4c65339b07d347003ed89d5e00f49a62e9b21483 Author: Sakthivel Velumani <velumani@eurecom.fr> Date: Tue Aug 30 18:04:59 2022 -0400 Linked E1AP lib to L2_NR target E1AP builds for nr-softmodem commit 014fe30ac93c84d810e0209bc7f0d3b7a1bbaee3 Author: Sakthivel Velumani <velumani@eurecom.fr> Date: Tue Aug 30 15:49:27 2022 -0400 Remove xer prints from e1ap and gcc warning fixes commit 71f0c9126bbb91bc595b66d57e1e91db676d3b9d Author: Sakthivel Velumani <velumani@eurecom.fr> Date: Tue Aug 30 15:42:30 2022 -0400 Fixed bug in integrity protection config commit 4e393ef9528c2b14d670a341b52fc63262abf894 Author: Sakthivel Velumani <velumani@eurecom.fr> Date: Tue Aug 30 14:34:37 2022 -0400 GTP init with only local address IP traffic works both directions in Mono, F1 and E1 commit ec3bde2c5deb99f554afc2053e351b9f79525e96 Author: Sakthivel Velumani <velumani@eurecom.fr> Date: Tue Aug 30 00:16:03 2022 -0400 Fix bug in pdcp config and GTP instance UL iperf still not works. Can see packets in wireshark. commit be8df4435eeae0a0755e2ac658f33caa2a3e3c94 Author: Sakthivel Velumani <velumani@eurecom.fr> Date: Sat Aug 27 20:15:04 2022 -0400 Fixes in node config after rebase commit 6f42ff88de7f1615f87c46771fd6617a5fdfc48f Author: Sakthivel Velumani <velumani@eurecom.fr> Date: Sat Aug 27 01:38:21 2022 -0400 Added N3 tunnel address in config params fixed bug in address length feild commit b5e132041994344ebb5c2c59ca392612a32658fd Author: Sakthivel Velumani <velumani@eurecom.fr> Date: Fri Aug 26 20:38:47 2022 -0400 Send UL UP address via F1 UE cxt mod msg commit ecfd0fe260aee6aad78c291368c246f88b6bffcf Author: Sakthivel Velumani <velumani@eurecom.fr> Date: Fri Aug 26 15:08:53 2022 -0400 Update GTP remote address from response message Modified GTP tunnel update function accordingly Put GTP tunnel update out of F1AP F1 split works commit 14a37e414de3d653f25ccef1a790bc5b08fc7dc2 Author: Sakthivel Velumani <velumani@eurecom.fr> Date: Sat Aug 20 01:17:36 2022 -0400 Moved GTP tunnel creation out of F1AP message sending commit cdd58ab96e84f48cc8ab8f0fe6b3133081ff02f7 Author: Sakthivel Velumani <velumani@eurecom.fr> Date: Fri Aug 19 17:40:43 2022 -0400 Moved DRB config out of RRCReconfig complete Monolithic and F1 split works commit 61d66e490a1b61aa2b6ce18d993bb90d112d6374 Author: Sakthivel Velumani <velumani@eurecom.fr> Date: Thu Aug 11 01:30:10 2022 -0400 Allow CUUP to have RRC inst without error commit dd7ae889372bb9fdf9e96be87c28eed0d9461d7f Author: Sakthivel Velumani <velumani@eurecom.fr> Date: Thu Aug 11 01:29:21 2022 -0400 Added missing IEs in bearer cxt response handler commit a6f1fe5fd254ccb36a54ede5b652161cb5e542e8 Author: Sakthivel Velumani <velumani@eurecom.fr> Date: Wed Aug 10 21:02:30 2022 -0400 Unified bearer context message transfer for E1 and non-E1 mode compiles, to be tested commit f245ace285632edcc28d669123746b9bf458bc38 Author: laurent <laurent Thomas> Date: Tue Aug 9 17:46:52 2022 +0200 remove log_i() of fatal errors commit d2a0f3c8620981f3b65a136f0169e3be9c549742 Author: laurent <laurent Thomas> Date: Fri Aug 5 15:01:39 2022 +0200 fix rnti/ue_id for ue commit 7b52c6cd9e675c28cb9d6347d122f77234ec6542 Author: Sakthivel Velumani <velumani@eurecom.fr> Date: Thu Aug 4 19:14:46 2022 -0400 Created separate functions in PDCP for E1 mode commit 46680d2b3d221e675c3aeb675137f45318e31acb Author: Sakthivel Velumani <velumani@eurecom.fr> Date: Thu Aug 4 19:13:10 2022 -0400 Bug fixes in bearer context setup response commit 3d091bfd31b7aba625e4ba4b4f0f337cf2c1f6db Author: laurent <laurent Thomas> Date: Thu Aug 4 15:42:11 2022 +0200 add missing file from previous commit commit 21838572196dec947da99f350f20c4d9408c3c17 Author: Sakthivel Velumani <velumani@eurecom.fr> Date: Wed Aug 3 16:59:16 2022 -0400 Minor bug fixes commit 34eb73fbc6f9d33098850d62b4808e54c80bb4ca Author: Sakthivel Velumani <velumani@eurecom.fr> Date: Tue Aug 2 23:16:47 2022 -0400 Added config files for testing To be renamed or removed later commit a7e9c6fb9332295ad42585eb4338a6f9ff0ae7c0 Author: Sakthivel Velumani <velumani@eurecom.fr> Date: Tue Aug 2 23:15:21 2022 -0400 Made rrc_gNB_get_ue_context_from_ngap_ids() non static commit 028f0407571466ff24cf72b5c3814e42c346ae81 Author: Sakthivel Velumani <velumani@eurecom.fr> Date: Tue Aug 2 23:12:16 2022 -0400 Completed bearer context setup cycle To be tested: Handling of bearer context setup response and subsequent UE context modifition msg to F1AP task commit 4481d11324b13efa73ab0b5f4f156012485661ae Author: Sakthivel Velumani <velumani@eurecom.fr> Date: Tue Aug 2 23:01:50 2022 -0400 Fixed E1AP PPID (wireshark fixed) commit 7a22573f3e7e16960e3310609dea2783ddf404a2 Author: laurent <laurent Thomas> Date: Fri Jul 29 13:03:31 2022 +0200 fix compile issues, simplify gtp send function commit 0209011aa75a16e4c9c1eb36ebcf4fe0ff93aba2 Author: laurent <laurent Thomas> Date: Thu Jul 28 11:51:18 2022 +0200 restore compilation capability, gtp replacement of rnti by ueid commit ce3b886fd7f11322a8d37b924d1752e6a6adf777 Author: Sakthivel Velumani <velumani@eurecom.fr> Date: Fri Jul 22 08:35:31 2022 -0400 Included missing IEs in bearer cxt setup message commit 1208ae0d6fe4b25341c9036dde111fd4d00fd6e9 Author: Cedric Roux <cedric.roux@eurecom.fr> Date: Tue Jul 19 10:53:35 2022 +0200 replace rnti by ue_id in pdcp some sdap and gtp files had to be touched, the work is not finished in there some changes in nr_pdcp_oai_api.c simply assume ue_id is indeed rnti (will functions in this file be used by cu-up?) commit e67d1c88c786267458194e4de516919d0b5d1002 Author: Sakthivel Velumani <velumani@eurecom.fr> Date: Tue Jul 19 10:08:39 2022 +0200 Replace RNTI with UE ID in GTP files (half done. Laurent to change ctxt_t) commit 7a141e8e941e5c2624a47da7c764531c03b8f617 Author: Sakthivel Velumani <velumani@eurecom.fr> Date: Tue Jul 19 10:04:15 2022 +0200 Added RRC handler for bearer cxt setup in CUUP commit fe2106676bf9144347f30969a1bfd351136f536a Author: laurent <laurent Thomas> Date: Mon Jul 11 13:30:30 2022 +0200 fix race in startup procedure (config before starting threads that use the config) commit 3197baab60e53459928da30cea7a4e0514a074e3 Author: Sakthivel Velumani <velumani@eurecom.fr> Date: Sun Jul 10 11:30:31 2022 +0200 Fixed bugs in bearer creation commit 26be61167dec9068e572e08a21ddc96a0f2a7731 Author: laurent <laurent Thomas> Date: Sun Jul 10 10:50:57 2022 +0200 fix a race, add asn1c debug method commit 26750d1818aa206c4c56ada6dbed9bb66dfe3811 Author: laurent <laurent Thomas> Date: Wed Jul 6 22:34:10 2022 +0200 e1ap bearer setup encoding invalid commit d092788aa3f8229eb5c938a41534dfb318955135 Author: laurent <laurent Thomas> Date: Wed Jul 6 14:18:39 2022 +0200 fix regression with F1, some basic cleaning in NGAP commit 41a135734a33b284808d4c5049c431dbc0ff1c46 Author: laurent <laurent Thomas> Date: Wed Jul 6 11:24:52 2022 +0200 fix some ngap regressions commit 460acd840dd58fd46a995219cb9da8fda103668e Author: laurent <laurent Thomas> Date: Tue Jul 5 21:19:13 2022 +0200 build, run in F1 mode until UE connect but pdu session still fails commit 7c067095df287cc7a542be53e9a1471c11ec5af8 Author: Sakthivel Velumani <velumani@eurecom.fr> Date: Sat Jun 25 22:45:46 2022 +0530 Populate PDU and DRB paramenters from NGAP commit c4ada56a8c31b4c07fc1498e15b0954d9b1ad2f6 Author: Sakthivel Velumani <velumani@eurecom.fr> Date: Tue Jun 7 22:16:58 2022 +0530 setup resp decoding success commit a2f41597c7438934a203ccf3cced35b6b65e8cee Author: Sakthivel Velumani <velumani@eurecom.fr> Date: Sat Jun 4 13:50:55 2022 +0530 Fixed bugs in E1 setup procedure E1 setup request decoding successful commit 6106207ba74c74579b5f375d572930a609abe3a9 Author: Sakthivel Velumani <velumani@eurecom.fr> Date: Thu May 26 20:13:14 2022 +0530 Fixing build issues commit 67235fac01aaca4c17da13bf658144ffe6bd12df Author: Robert Schmidt <robert.schmidt@openairinterface.org> Date: Mon May 23 12:04:22 2022 +0200 Make nr-softmodem depend on E1AP module commit 391cee938e8250c355b6b914e747f2004c795817 Author: Robert Schmidt <robert.schmidt@openairinterface.org> Date: Mon May 23 11:57:15 2022 +0200 Fix ITTI errors in E1AP target commit db4146e4a0432b7e3759d71efbeb450754c1f0d3 Author: Sakthivel Velumani <velumani@eurecom.fr> Date: Wed May 18 06:59:03 2022 +0530 CP UP task created commit 3058d2fc445acf5681a09f70409023718294d093 Author: Sakthivel Velumani <velumani@eurecom.fr> Date: Tue May 10 08:12:19 2022 +0530 Bearer context setup response message commit b911e9db2a4d0a35eb9a449ef02acefff30b558f Author: Sakthivel Velumani <velumani@eurecom.fr> Date: Tue May 3 16:52:49 2022 +0530 Bearer context setup c structs commit d0f4d5f3539803253b9a995a90a47b3d825ea0ca Author: Sakthivel Velumani <velumani@eurecom.fr> Date: Thu Apr 28 02:21:50 2022 +0530 Bearer context setup message commit 489a5358fa0e199314254561a2d52c1a93f7803e Author: Sakthivel Velumani <velumani@eurecom.fr> Date: Thu Apr 21 10:11:03 2022 +0530 Started with CUUP task commit b416061f5a237cbabbe09c6d81fe92df9e33fd72 Author: Sakthivel Velumani <velumani@eurecom.fr> Date: Fri Apr 15 18:46:27 2022 +0530 Setup request and response messages commit faca4b97dba92be857bd8442193365fc2c8ed122 Author: Robert Schmidt <robert.schmidt@openairinterface.org> Date: Mon Apr 11 15:01:48 2022 +0200 Fixup for cmake execution commit ecfd9f7608a5820ae85278939e9bbaf7f1245dd6 Author: Robert Schmidt <robert.schmidt@eurecom.fr> Date: Tue Nov 24 21:39:20 2020 +0100 Move CMakeLists.txt into root commit 9f41f7c52b3c7a185e5e34bb1591b0eb66459837 Author: Robert Schmidt <robert.schmidt@openairinterface.org> Date: Tue Apr 12 12:07:18 2022 +0200 Remove hwlat refs in build_oai: targets don't exist anymore commit e666cf5eedc67695febd33de1397331d6b7b2320 Author: Robert Schmidt <robert.schmidt@openairinterface.org> Date: Mon Apr 11 14:37:32 2022 +0200 Create CMake E1AP_RELEASE variable from E1AP_VERSION commit 1f8413361c1b99ea46ee613da035803a1387f65c Author: Robert Schmidt <robert.schmidt@openairinterface.org> Date: Sun Apr 10 14:25:38 2022 +0200 Add E1AP lib commit 7465cea49243fd6eb9869035b18860dface57098 Author: Robert Schmidt <robert.schmidt@openairinterface.org> Date: Sun Apr 10 14:48:40 2022 +0200 Add E1AP Grammar and build ASN.1 lib at build time commit cde22f83032a199387ae1eae6b702f44ed154f3e Author: Robert Schmidt <robert.schmidt@openairinterface.org> Date: Fri Apr 22 13:42:51 2022 +0200 Accept higher vers. nums in make_version/MAKE_VERSION commit d5127b23608240374a439d1d9c2ff6d53c4b527c Author: Robert Schmidt <robert.schmidt@eurecom.fr> Date: Tue Nov 24 21:39:20 2020 +0100 Move CMakeLists.txt into root
2023-02-11 12:32:34 +01:00
parent f984f49310
commit 553f1d1a52
80 changed files with 4652 additions and 1422 deletions
@@ -1,7 +1,7 @@
 add_subdirectory(MESSAGES)

-add_library(E1AP e1ap.c)
-target_link_libraries(E1AP
-                        PUBLIC asn1_e1ap
-                        PRIVATE UTIL asn1_nr_rrc asn1_lte_rrc)
-target_include_directories(E1AP PUBLIC ${CMAKE_CURRENT_DIR})
+add_library(e1ap e1ap.c e1ap_common.c e1ap_api.c)
+target_link_libraries(e1ap
+                      PUBLIC asn1_e1ap f1ap
+                      PRIVATE asn1_nr_rrc asn1_lte_rrc asn1_f1ap UTIL e1_pdcp_if e1_if)
+target_include_directories(e1ap PUBLIC ${CMAKE_CURRENT_DIR})
@@ -24,11 +24,33 @@
 #ifndef __E1AP_H_
 #define __E1AP_H_

-#include <common/utils/LOG/log.h>
-#include "common/openairinterface5g_limits.h"
-#include <openair2/RRC/NR/MESSAGES/asn1_msg.h>
+#include "openair2/COMMON/e1ap_messages_types.h"
+#include "e1ap_asnc.h"
+#include "openair2/E1AP/e1ap_common.h"

-#include <E1AP_Cause.h>
-#include <E1AP_InitiatingMessage.h>
-#include <E1AP_E1AP-PDU.h>
+int e1apCUCP_handle_SETUP_REQUEST(e1ap_upcp_inst_t *inst, const E1AP_E1AP_PDU_t *pdu);
+
+int e1apCUUP_handle_SETUP_RESPONSE(e1ap_upcp_inst_t *inst, const E1AP_E1AP_PDU_t *pdu);
+
+int e1apCUUP_handle_SETUP_FAILURE(e1ap_upcp_inst_t *inst, const E1AP_E1AP_PDU_t *pdu);
+
+int e1apCUUP_handle_BEARER_CONTEXT_SETUP_REQUEST(e1ap_upcp_inst_t *inst, const E1AP_E1AP_PDU_t *pdu);
+
+int e1apCUCP_handle_BEARER_CONTEXT_SETUP_RESPONSE(e1ap_upcp_inst_t *inst, const E1AP_E1AP_PDU_t *pdu);
+
+int e1apCUCP_handle_BEARER_CONTEXT_SETUP_FAILURE(e1ap_upcp_inst_t *inst, const E1AP_E1AP_PDU_t *pdu);
+
+int e1apCUUP_handle_BEARER_CONTEXT_MODIFICATION_REQUEST(e1ap_upcp_inst_t *inst, const E1AP_E1AP_PDU_t *pdu);
+
+void e1apCUUP_send_BEARER_CONTEXT_SETUP_RESPONSE(e1ap_upcp_inst_t *inst, e1ap_bearer_setup_resp_t *const resp);
+
+int e1apCUUP_handle_BEARER_CONTEXT_RELEASE_COMMAND(e1ap_upcp_inst_t *inst, const E1AP_E1AP_PDU_t *pdu);
+
+int e1apCUCP_handle_BEARER_CONTEXT_RELEASE_COMPLETE(e1ap_upcp_inst_t *inst, const E1AP_E1AP_PDU_t *pdu);
+
+int e1apCUUP_send_BEARER_CONTEXT_RELEASE_COMPLETE(e1ap_upcp_inst_t *inst, e1ap_bearer_release_cmd_t *const cmd);
+
+void *E1AP_CUUP_task(void *arg);
+
+void *E1AP_CUCP_task(void *arg);
 #endif
@@ -0,0 +1,195 @@
+/*
+ * Licensed to the OpenAirInterface (OAI) Software Alliance under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The OpenAirInterface Software Alliance licenses this file to You under
+ * the OAI Public License, Version 1.1  (the "License"); you may not use this file
+ * except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.openairinterface.org/?page_id=698
+ *
+ * Author and copyright: Laurent Thomas, open-cells.com
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *-------------------------------------------------------------------------------
+ * For more information about the OpenAirInterface (OAI) Software Alliance:
+ *      contact@openairinterface.org
+ */
+
+#include <arpa/inet.h>
+#include "e1ap_api.h"
+#include "UTIL/OSA/osa_defs.h"
+#include "nr_pdcp/nr_pdcp_entity.h"
+#include "openair2/LAYER2/nr_pdcp/nr_pdcp_e1_api.h"
+#include "openair2/RRC/NR/cucp_cuup_if.h"
+#include "openair2/RRC/LTE/MESSAGES/asn1_msg.h"
+#include "openair3/ocp-gtpu/gtp_itf.h"
+#include "e1ap_asnc.h"
+#include "e1ap_common.h"
+#include "e1ap.h"
+
+struct NR_DRB_ToAddMod;
+static void fill_DRB_configList_e1(NR_DRB_ToAddModList_t *DRB_configList, pdu_session_to_setup_t *pdu) {
+
+  for (int i=0; i < pdu->numDRB2Setup; i++) {
+    DRB_nGRAN_to_setup_t *drb = pdu->DRBnGRanList + i;
+    asn1cSequenceAdd(DRB_configList->list, struct NR_DRB_ToAddMod, ie);
+    ie->drb_Identity = drb->id;
+    ie->cnAssociation = CALLOC(1, sizeof(*ie->cnAssociation));
+    ie->cnAssociation->present = NR_DRB_ToAddMod__cnAssociation_PR_sdap_Config;
+
+    // sdap_Config
+    asn1cCalloc(ie->cnAssociation->choice.sdap_Config, sdap_config);
+    sdap_config->pdu_Session = pdu->sessionId;
+    sdap_config->sdap_HeaderDL = drb->sDAP_Header_DL;
+    sdap_config->sdap_HeaderUL = drb->sDAP_Header_UL;
+    sdap_config->defaultDRB = drb->defaultDRB;
+
+    asn1cCalloc(sdap_config->mappedQoS_FlowsToAdd, FlowsToAdd);
+    for (int j=0; j < drb->numQosFlow2Setup; j++) {
+      asn1cSequenceAdd(FlowsToAdd->list, NR_QFI_t, qfi);
+      *qfi = drb->qosFlows[j].fiveQI;
+    }
+    sdap_config->mappedQoS_FlowsToRelease = NULL;
+
+    // pdcp_Config
+    ie->reestablishPDCP = NULL;
+    ie->recoverPDCP = NULL;
+    asn1cCalloc(ie->pdcp_Config, pdcp_config);
+    asn1cCalloc(pdcp_config->drb, drbCfg);
+    asn1cCallocOne(drbCfg->discardTimer, drb->discardTimer);
+    asn1cCallocOne(drbCfg->pdcp_SN_SizeUL, drb->pDCP_SN_Size_UL);
+    asn1cCallocOne(drbCfg->pdcp_SN_SizeDL, drb->pDCP_SN_Size_DL);
+    drbCfg->headerCompression.present = NR_PDCP_Config__drb__headerCompression_PR_notUsed;
+    drbCfg->headerCompression.choice.notUsed = 0;
+
+    drbCfg->integrityProtection = NULL;
+    drbCfg->statusReportRequired = NULL;
+    drbCfg->outOfOrderDelivery = NULL;
+    pdcp_config->moreThanOneRLC = NULL;
+
+    pdcp_config->t_Reordering = calloc(1, sizeof(*pdcp_config->t_Reordering));
+    *pdcp_config->t_Reordering = drb->reorderingTimer;
+    pdcp_config->ext1 = NULL;
+
+    if (pdu->integrityProtectionIndication == 0 || // Required
+        pdu->integrityProtectionIndication == 1) { // Preferred
+      asn1cCallocOne(drbCfg->integrityProtection, NR_PDCP_Config__drb__integrityProtection_enabled);
+    }
+
+    if (pdu->confidentialityProtectionIndication == 0 || // Required
+        pdu->confidentialityProtectionIndication == 1) { // Preferred
+      asn1cCalloc(pdcp_config->ext1, ext1);
+      asn1cCallocOne(ext1->cipheringDisabled, NR_PDCP_Config__ext1__cipheringDisabled_true);
+    }
+  }
+}
+
+static int drb_config_N3gtpu_create(e1ap_bearer_setup_req_t * const req,
+                                    gtpv1u_gnb_create_tunnel_resp_t *create_tunnel_resp,
+                                    instance_t instance) {
+
+  gtpv1u_gnb_create_tunnel_req_t create_tunnel_req={0};
+
+  NR_DRB_ToAddModList_t DRB_configList = {0};
+  for (int i=0; i < req->numPDUSessions; i++) {
+    pdu_session_to_setup_t *const pdu = &req->pduSession[i];
+    create_tunnel_req.pdusession_id[i] = pdu->sessionId;
+    create_tunnel_req.incoming_rb_id[i] = pdu->DRBnGRanList[0].id; // taking only the first DRB. TODO:change this
+    memcpy(&create_tunnel_req.dst_addr[i].buffer,
+           &pdu->tlAddress,
+           sizeof(uint8_t)*4);
+    create_tunnel_req.dst_addr[i].length = 32; // 8bits * 4bytes
+    create_tunnel_req.outgoing_teid[i] = pdu->teId;
+    fill_DRB_configList_e1(&DRB_configList, pdu);
+  }
+  create_tunnel_req.num_tunnels = req->numPDUSessions;
+  create_tunnel_req.ue_id = (req->gNB_cu_cp_ue_id & 0xFFFF);
+
+  // Create N3 tunnel
+  int ret = gtpv1u_create_ngu_tunnel(instance,
+                                     &create_tunnel_req,
+                                     create_tunnel_resp);
+  if (ret != 0) {
+    LOG_E(NR_RRC,"rrc_gNB_process_NGAP_PDUSESSION_SETUP_REQ : gtpv1u_create_ngu_tunnel failed,start to release UE id %ld\n",
+          create_tunnel_req.ue_id);
+    return ret;
+  }
+
+  // Configure DRBs
+  uint8_t *kUPenc = NULL;
+  uint8_t *kUPint = NULL;
+
+  nr_derive_key(UP_ENC_ALG, req->cipheringAlgorithm, (uint8_t *)req->encryptionKey, &kUPenc);
+
+  nr_derive_key(UP_INT_ALG, req->integrityProtectionAlgorithm, (uint8_t *)req->integrityProtectionKey, &kUPint);
+
+  nr_pdcp_e1_add_drbs(true, // set this to notify PDCP that his not UE
+                      create_tunnel_req.ue_id,
+                      &DRB_configList,
+                      (req->integrityProtectionAlgorithm << 4) | req->cipheringAlgorithm,
+                      kUPenc,
+                      kUPint);
+  return ret;
+}
+
+void process_e1_bearer_context_setup_req(instance_t instance, e1ap_bearer_setup_req_t *const req)
+{
+  e1ap_upcp_inst_t *inst = getCxtE1(instance);
+  AssertFatal(inst, "");
+  gtpv1u_gnb_create_tunnel_resp_t create_tunnel_resp_N3={0};
+
+  // GTP tunnel for UL
+  drb_config_N3gtpu_create(req, &create_tunnel_resp_N3, inst->gtpInstN3);
+
+  MessageDef *msg = itti_alloc_new_message(TASK_CUCP_E1, 0, E1AP_BEARER_CONTEXT_SETUP_RESP);
+  e1ap_bearer_setup_resp_t *resp = &E1AP_BEARER_CONTEXT_SETUP_RESP(msg);
+
+  in_addr_t my_addr;
+  if (inet_pton(AF_INET, inst->setupReq.localAddressF1U, &my_addr) != 1)
+    LOG_E(E1AP, "can't use the F1-U local interface: %s\n", inst->setupReq.localAddressF1U);
+  fill_e1ap_bearer_setup_resp(resp, req, inst->gtpInstF1U, req->gNB_cu_cp_ue_id, inst->setupReq.remotePortF1U, my_addr);
+
+  resp->gNB_cu_cp_ue_id = req->gNB_cu_cp_ue_id;
+  resp->numPDUSessions = req->numPDUSessions;
+  for (int i=0; i < req->numPDUSessions; i++) {
+    pdu_session_setup_t *pduSetup = resp->pduSession + i;
+    pdu_session_to_setup_t *pdu2Setup = req->pduSession + i;
+
+    pduSetup->id = pdu2Setup->sessionId;
+    if (inet_pton(AF_INET, inst->setupReq.localAddressN3, &pduSetup->tlAddress) != 1)
+      LOG_E(E1AP, "can't use the N3 local interface: %s\n", inst->setupReq.localAddressN3);
+    pduSetup->teId = create_tunnel_resp_N3.gnb_NGu_teid[i];
+    pduSetup->numDRBSetup = pdu2Setup->numDRB2Setup;
+
+    // At this point we don't have a way to know the DRBs that failed to setup
+    // We assume all DRBs to setup have are setup successfully so we always send successful outcome in response
+    // TODO: Modify nr_pdcp_add_drbs() to return DRB list that failed to setup to support E1AP
+    pduSetup->numDRBFailed = 0;
+  }
+
+  e1apCUUP_send_BEARER_CONTEXT_SETUP_RESPONSE(inst, resp);
+}
+
+void CUUP_process_bearer_context_mod_req(instance_t instance, e1ap_bearer_setup_req_t *const req)
+{
+  e1ap_upcp_inst_t *inst = getCxtE1(instance);
+  AssertFatal(inst, "");
+  // assume we receive modification of F1-U but it is wrong, we can also get modification of N3 when HO will occur
+  CU_update_UP_DL_tunnel(req, inst->gtpInstF1U, req->gNB_cu_cp_ue_id);
+  // TODO: send bearer cxt mod response
+}
+
+void CUUP_process_bearer_release_command(instance_t instance, e1ap_bearer_release_cmd_t *const cmd)
+{
+  e1ap_upcp_inst_t *inst = getCxtE1(instance);
+  AssertFatal(inst, "");
+  newGtpuDeleteAllTunnels(inst->gtpInstN3, cmd->gNB_cu_up_ue_id);
+  newGtpuDeleteAllTunnels(inst->gtpInstF1U, cmd->gNB_cu_up_ue_id);
+  e1apCUUP_send_BEARER_CONTEXT_RELEASE_COMPLETE(inst, cmd);
+}
@@ -0,0 +1,35 @@
+/*
+ * Licensed to the OpenAirInterface (OAI) Software Alliance under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The OpenAirInterface Software Alliance licenses this file to You under
+ * the OAI Public License, Version 1.1  (the "License"); you may not use this file
+ * except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.openairinterface.org/?page_id=698
+ *
+ * Author and copyright: Laurent Thomas, open-cells.com
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *-------------------------------------------------------------------------------
+ * For more information about the OpenAirInterface (OAI) Software Alliance:
+ *      contact@openairinterface.org
+ */
+
+#ifndef E1AP_API_H
+#define E1AP_API_H
+
+#include "platform_types.h"
+#include "openair2/COMMON/e1ap_messages_types.h"
+#include "openair2/E1AP/e1ap_common.h"
+void cuup_init_n3(instance_t instance);
+void process_e1_bearer_context_setup_req(instance_t, e1ap_bearer_setup_req_t *const req);
+void CUUP_process_bearer_context_mod_req(instance_t, e1ap_bearer_setup_req_t *const req);
+
+void CUUP_process_bearer_release_command(instance_t, e1ap_bearer_release_cmd_t *const cmd);
+#endif
@@ -0,0 +1,65 @@
+/*
+ * Licensed to the OpenAirInterface (OAI) Software Alliance under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The OpenAirInterface Software Alliance licenses this file to You under
+ * the OAI Public License, Version 1.1  (the "License"); you may not use this file
+ * except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.openairinterface.org/?page_id=698
+ *
+ * Author and copyright: Laurent Thomas, open-cells.com
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *-------------------------------------------------------------------------------
+ * For more information about the OpenAirInterface (OAI) Software Alliance:
+ *      contact@openairinterface.org
+ */
+
+#ifndef E1AP_ASNC_H
+#define E1AP_ASNC_H
+
+#include <E1AP_Cause.h>
+#include <E1AP_InitiatingMessage.h>
+#include <E1AP_E1AP-PDU.h>
+#include <E1AP_ProtocolIE-Field.h>
+#include <E1AP_SupportedPLMNs-Item.h>
+#include <E1AP_SuccessfulOutcome.h>
+#include <E1AP_ProtocolIE-Field.h>
+#include <E1AP_UnsuccessfulOutcome.h>
+#include <E1AP_GNB-CU-UP-E1SetupFailure.h>
+#include <E1AP_GNB-CU-UP-ConfigurationUpdate.h>
+#include <E1AP_GNB-CU-UP-TNLA-To-Remove-Item.h>
+#include <E1AP_CP-TNL-Information.h>
+#include <E1AP_UP-Parameters-Item.h>
+#include <E1AP_UP-TNL-Information.h>
+#include <E1AP_PDU-Session-Resource-Setup-Item.h>
+#include <E1AP_DRB-Setup-Item-EUTRAN.h>
+#include <E1AP_DRB-Setup-Item-NG-RAN.h>
+#include <E1AP_QoS-Flow-QoS-Parameter-Item.h>
+#include <E1AP_QoS-Flow-Item.h>
+#include <E1AP_DRB-Failed-List-NG-RAN.h>
+#include <E1AP_DRB-Failed-Item-NG-RAN.h>
+#include <E1AP_BearerContextSetupResponse.h>
+#include <E1AP_BearerContextSetupRequest.h>
+#include <E1AP_DRB-To-Setup-Item-EUTRAN.h>
+#include <E1AP_DRB-To-Setup-Item-NG-RAN.h>
+#include <E1AP_Cell-Group-Information-Item.h>
+#include <E1AP_PDU-Session-Resource-To-Setup-Item.h>
+#include <E1AP_PDU-Session-Resource-To-Modify-List.h>
+#include <E1AP_PDU-Session-Resource-To-Modify-Item.h>
+#include <E1AP_DRB-To-Modify-List-NG-RAN.h>
+#include <E1AP_DRB-To-Modify-Item-NG-RAN.h>
+#include <E1AP_GTPTunnel.h>
+#include <E1AP_Non-Dynamic5QIDescriptor.h>
+#include <E1AP_Dynamic5QIDescriptor.h>
+#include <E1AP_T-ReorderingTimer.h>
+#include <E1AP_SDAP-Configuration.h>
+#include <E1AP_PDCP-Configuration.h>
+
+#endif
@@ -0,0 +1,235 @@
+/*
+ * Licensed to the OpenAirInterface (OAI) Software Alliance under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The OpenAirInterface Software Alliance licenses this file to You under
+ * the OAI Public License, Version 1.1  (the "License"); you may not use this file
+ * except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.openairinterface.org/?page_id=698
+ *
+ * Author and copyright: Laurent Thomas, open-cells.com
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *-------------------------------------------------------------------------------
+ * For more information about the OpenAirInterface (OAI) Software Alliance:
+ *      contact@openairinterface.org
+ */
+
+#include <time.h>
+#include <stdlib.h>
+#include "e1ap_common.h"
+#include "e1ap_default_values.h"
+#include "e1ap_asnc.h"
+#include "common/openairinterface5g_limits.h"
+#include "common/utils/ocp_itti/intertask_interface.h"
+
+static e1ap_upcp_inst_t *e1ap_inst[NUMBER_OF_gNB_MAX] = {0};
+
+e1ap_upcp_inst_t *getCxtE1(instance_t instance)
+{
+  AssertFatal(instance < sizeofArray(e1ap_inst), "instance exceeds limit\n");
+  return e1ap_inst[instance];
+}
+
+int e1ap_assoc_id(E1_t type, instance_t instance) {
+  AssertFatal(e1ap_inst[instance] != NULL, "Trying to access uninitiated instance of CUCP\n");
+  return e1ap_inst[instance]->setupReq.assoc_id;
+}
+
+void createE1inst(E1_t type, instance_t instance, e1ap_setup_req_t *req) {
+  AssertFatal(e1ap_inst[instance] == NULL, "Double call to E1 instance %d\n", (int)instance);
+  e1ap_inst[instance] = calloc(1, sizeof(e1ap_upcp_inst_t));
+  e1ap_inst[instance]->type = type;
+  e1ap_inst[instance]->instance = instance;
+  if (req)
+    memcpy(&e1ap_inst[instance]->setupReq, req, sizeof(*req));
+  e1ap_inst[instance]->gtpInstN3 = -1;
+  e1ap_inst[instance]->gtpInstF1U = -1;
+}
+
+E1AP_TransactionID_t transacID[E1AP_MAX_NUM_TRANSAC_IDS] = {0}; 
+
+void e1ap_common_init() {
+  srand(time(NULL));
+}
+
+bool check_transac_id(E1AP_TransactionID_t id, int *freeIdx) {
+
+  bool isFreeIdxSet = false;
+  for (int i=0; i < E1AP_MAX_NUM_TRANSAC_IDS; i++) {
+    if (id == transacID[i])
+      return false;
+    else if (!isFreeIdxSet && (transacID[i] == 0)) {
+      *freeIdx = i;
+      isFreeIdxSet = true;
+    }
+  }
+
+  return true;
+}
+
+E1AP_TransactionID_t E1AP_get_next_transaction_identifier() {
+  E1AP_TransactionID_t genTransacId;
+  bool isTransacIdValid = false;
+  int freeIdx;
+
+  while (!isTransacIdValid) {
+    genTransacId = rand() & 255;
+    isTransacIdValid = check_transac_id(genTransacId, &freeIdx);
+  }
+
+  AssertFatal(freeIdx < E1AP_MAX_NUM_TRANSAC_IDS, "Free Index exceeds array length\n");
+  transacID[freeIdx] = genTransacId;
+  return genTransacId;
+}
+
+void E1AP_free_transaction_identifier(E1AP_TransactionID_t id) {
+
+  for (int i=0; i < E1AP_MAX_NUM_TRANSAC_IDS; i++) {
+    if (id == transacID[i]) {
+      transacID[i] = 0;
+      return;
+    }
+  }
+  LOG_E(E1AP, "Couldn't find transaction ID %ld in list\n", id);
+}
+
+int e1ap_decode_initiating_message(E1AP_E1AP_PDU_t *pdu) {
+  DevAssert(pdu != NULL);
+
+  switch(pdu->choice.initiatingMessage->procedureCode) {
+    case E1AP_ProcedureCode_id_gNB_CU_UP_E1Setup:
+      break;
+
+    case E1AP_ProcedureCode_id_gNB_CU_UP_ConfigurationUpdate:
+      break;
+
+    case E1AP_ProcedureCode_id_bearerContextSetup:
+      break;
+
+    case E1AP_ProcedureCode_id_bearerContextModification:
+      break;
+
+    default:
+      LOG_E(E1AP, "Unsupported procedure code (%d) for initiating message\n",
+            (int)pdu->choice.initiatingMessage->procedureCode);
+      return -1;
+  }
+  return 0;
+}
+
+int e1ap_decode_successful_outcome(E1AP_E1AP_PDU_t *pdu) {
+  DevAssert(pdu != NULL);
+  switch(pdu->choice.successfulOutcome->procedureCode) {
+    case E1AP_ProcedureCode_id_gNB_CU_UP_E1Setup:
+      break;
+
+    case E1AP_ProcedureCode_id_bearerContextSetup:
+      break;
+
+    default:
+      LOG_E(E1AP, "Unsupported procedure code (%d) for successful message\n",
+            (int)pdu->choice.successfulOutcome->procedureCode);
+      return -1;
+  }
+  return 0;
+}
+
+int e1ap_decode_unsuccessful_outcome(E1AP_E1AP_PDU_t *pdu) {
+  DevAssert(pdu != NULL);
+  switch(pdu->choice.unsuccessfulOutcome->procedureCode) {
+    case E1AP_ProcedureCode_id_gNB_CU_UP_E1Setup:
+      break;
+
+    default:
+      LOG_E(E1AP, "Unsupported procedure code (%d) for unsuccessful message\n",
+            (int)pdu->choice.unsuccessfulOutcome->procedureCode);
+      return -1;
+  }
+  return 0;
+}
+
+int e1ap_decode_pdu(E1AP_E1AP_PDU_t *pdu, const uint8_t *const buffer, uint32_t length) {
+  asn_dec_rval_t dec_ret;
+  DevAssert(buffer != NULL);
+  dec_ret = aper_decode(NULL,
+                        &asn_DEF_E1AP_E1AP_PDU,
+                        (void **)&pdu,
+                        buffer,
+                        length,
+                        0,
+                        0);
+
+  if (LOG_DEBUGFLAG(DEBUG_ASN1)) {
+    LOG_E(E1AP, "----------------- ASN1 DECODER PRINT START----------------- \n");
+    xer_fprint(stdout, &asn_DEF_E1AP_E1AP_PDU, pdu);
+    LOG_E(E1AP, "----------------- ASN1 DECODER PRINT END ----------------- \n");
+  }
+
+  if (dec_ret.code != RC_OK) {
+    AssertFatal(1==0,"Failed to decode pdu\n");
+    return -1;
+  }
+
+  switch(pdu->present) {
+    case E1AP_E1AP_PDU_PR_initiatingMessage:
+      return e1ap_decode_initiating_message(pdu);
+
+    case E1AP_E1AP_PDU_PR_successfulOutcome:
+      return e1ap_decode_successful_outcome(pdu);
+
+    case E1AP_E1AP_PDU_PR_unsuccessfulOutcome:
+      return e1ap_decode_unsuccessful_outcome(pdu);
+
+    default:
+      LOG_E(E1AP, "Unknown presence (%d) or not implemented\n", (int)pdu->present);
+      break;
+  }
+
+  return -1;
+}
+
+int e1ap_encode_send(E1_t type, e1ap_setup_req_t *setupReq, E1AP_E1AP_PDU_t *pdu, uint16_t stream, const char *func)
+{
+  DevAssert(pdu != NULL);
+
+  if (LOG_DEBUGFLAG(DEBUG_ASN1)) {
+    LOG_E(E1AP, "----------------- ASN1 ENCODER PRINT START ----------------- \n");
+    xer_fprint(stdout, &asn_DEF_E1AP_E1AP_PDU, pdu);
+    LOG_E(E1AP, "----------------- ASN1 ENCODER PRINT END----------------- \n");
+  }
+
+  char errbuf[2048]; /* Buffer for error message */
+  size_t errlen = sizeof(errbuf); /* Size of the buffer */
+  int ret = asn_check_constraints(&asn_DEF_E1AP_E1AP_PDU, pdu, errbuf, &errlen);
+
+  if(ret) {
+    LOG_E(E1AP, "%s: Constraint validation failed: %s\n", func, errbuf);
+  }
+
+  void *buffer = NULL;
+  ssize_t encoded = aper_encode_to_new_buffer(&asn_DEF_E1AP_E1AP_PDU, 0, pdu, &buffer);
+  ASN_STRUCT_FREE_CONTENTS_ONLY(asn_DEF_E1AP_E1AP_PDU, pdu);
+
+  if (encoded < 0) {
+    LOG_E(E1AP, "%s: Failed to encode E1AP message\n", func);
+    return -1;
+  } else {
+    MessageDef *message = itti_alloc_new_message((type==CPtype)?TASK_CUCP_E1:TASK_CUUP_E1, 0, SCTP_DATA_REQ);
+    sctp_data_req_t *s = &message->ittiMsg.sctp_data_req;
+    s->assoc_id = setupReq->assoc_id;
+    s->buffer        = buffer;
+    s->buffer_length = encoded;
+    s->stream        = stream;
+    LOG_I(E1AP, "%s: Sending ITTI message to SCTP Task\n", func);
+    itti_send_msg_to_task(TASK_SCTP, 0 /*unused by callee*/, message);
+  }
+
+  return encoded;
+}
@@ -0,0 +1,64 @@
+/*
+ * Licensed to the OpenAirInterface (OAI) Software Alliance under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The OpenAirInterface Software Alliance licenses this file to You under
+ * the OAI Public License, Version 1.1  (the "License"); you may not use this file
+ * except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.openairinterface.org/?page_id=698
+ *
+ * Author and copyright: Laurent Thomas, open-cells.com
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *-------------------------------------------------------------------------------
+ * For more information about the OpenAirInterface (OAI) Software Alliance:
+ *      contact@openairinterface.org
+ */
+
+#ifndef E1AP_COMMON_H_
+#define E1AP_COMMON_H_
+#include "openair2/COMMON/e1ap_messages_types.h"
+#include "e1ap_asnc.h"
+#include "openair2/COMMON/sctp_messages_types.h"
+#include "common/ngran_types.h"
+
+typedef struct e1ap_upcp_inst_s {
+  bool incoming_sock;
+  instance_t instance;
+  bool same_process;
+  E1_t type;
+  enum sctp_state_e sockState;
+  uint32_t assoc_id;
+  instance_t gtpInstN3;
+  instance_t gtpInstF1U;
+  e1ap_setup_req_t setupReq;
+  e1ap_bearer_setup_req_t bearerSetupReq;
+  e1ap_bearer_setup_resp_t bearerSetupResp;
+} e1ap_upcp_inst_t;
+
+extern int asn1_xer_print;
+
+int e1ap_decode_pdu(E1AP_E1AP_PDU_t *pdu, const uint8_t *const buffer, uint32_t length);
+
+e1ap_upcp_inst_t *getCxtE1(instance_t instance);
+
+E1AP_TransactionID_t E1AP_get_next_transaction_identifier();
+
+void createE1inst(E1_t type, instance_t instance, e1ap_setup_req_t *req);
+
+bool check_transac_id(E1AP_TransactionID_t id, int *freeIdx);
+
+int e1ap_assoc_id(E1_t type, instance_t instance);
+
+int e1ap_encode_send(E1_t type, e1ap_setup_req_t *setupReq, E1AP_E1AP_PDU_t *pdu, uint16_t stream, const char *func);
+
+void e1ap_common_init();
+
+void E1AP_free_transaction_identifier(E1AP_TransactionID_t id);
+#endif /* E1AP_COMMON_H_ */
@@ -0,0 +1,28 @@
+/*
+ * Licensed to the OpenAirInterface (OAI) Software Alliance under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The OpenAirInterface Software Alliance licenses this file to You under
+ * the OAI Public License, Version 1.1  (the "License"); you may not use this file
+ * except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.openairinterface.org/?page_id=698
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *-------------------------------------------------------------------------------
+ * For more information about the OpenAirInterface (OAI) Software Alliance:
+ *      contact@openairinterface.org
+ */
+
+#ifndef E1AP_DEFAULT_VALUES_H
+#define E1AP_DEFAULT_VALUES_H
+
+#define E1AP_PORT_NUMBER (38462)
+#define E1AP_SCTP_PPID   (64)
+
+#endif
@@ -0,0 +1,129 @@
+/*
+ * Licensed to the OpenAirInterface (OAI) Software Alliance under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The OpenAirInterface Software Alliance licenses this file to You under
+ * the OAI Public License, Version 1.1  (the "License"); you may not use this file
+ * except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.openairinterface.org/?page_id=698
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *-------------------------------------------------------------------------------
+ * For more information about the OpenAirInterface (OAI) Software Alliance:
+ *      contact@openairinterface.org
+ */
+
+#include <string.h>
+#include <inttypes.h>
+#include <arpa/inet.h>
+#include "common/utils/LOG/log.h"
+#include "common/utils/nr/nr_common.h"
+#include "common/utils/LOG/log_extern.h"
+#include "assertions.h"
+#include "common/utils/ocp_itti/intertask_interface.h"
+#include "openair2/GNB_APP/gnb_paramdef.h"
+#include "openair3/ocp-gtpu/gtp_itf.h"
+
+static void get_NGU_S1U_addr(char **addr, uint16_t *port)
+{
+  int num_gnbs = 0;
+  char *gnb_ipv4_address_for_NGU = NULL;
+  uint32_t gnb_port_for_NGU = 0;
+  char *gnb_ipv4_address_for_S1U = NULL;
+  uint32_t gnb_port_for_S1U = 0;
+  char gtpupath[MAX_OPTNAME_SIZE * 2 + 8];
+
+  paramdef_t GNBSParams[] = GNBSPARAMS_DESC;
+  paramdef_t NETParams[] = GNBNETPARAMS_DESC;
+  LOG_I(GTPU, "Configuring GTPu\n");
+
+  /* get number of active eNodeBs */
+  config_get(GNBSParams, sizeof(GNBSParams) / sizeof(paramdef_t), NULL);
+  num_gnbs = GNBSParams[GNB_ACTIVE_GNBS_IDX].numelt;
+  AssertFatal(num_gnbs > 0, "Failed to parse config file no active gNodeBs in %s \n", GNB_CONFIG_STRING_ACTIVE_GNBS);
+
+  sprintf(gtpupath, "%s.[%i].%s", GNB_CONFIG_STRING_GNB_LIST, 0, GNB_CONFIG_STRING_NETWORK_INTERFACES_CONFIG);
+  config_get(NETParams, sizeof(NETParams) / sizeof(paramdef_t), gtpupath);
+  char *address;
+  if (NETParams[1].strptr != NULL) {
+    LOG_I(GTPU, "SA mode \n");
+    address = strdup(gnb_ipv4_address_for_NGU);
+    *port = gnb_port_for_NGU;
+  } else {
+    LOG_I(GTPU, "NSA mode \n");
+    address = strdup(gnb_ipv4_address_for_S1U);
+    *port = gnb_port_for_S1U;
+  }
+  if (strchr(address, '/'))
+    *strchr(address, '/') = 0;
+  *addr = address;
+  return;
+}
+
+MessageDef *RCconfig_NR_CU_E1(bool separate_CUUP_process)
+{
+  MessageDef *msgConfig = itti_alloc_new_message(TASK_GNB_APP, 0, E1AP_SETUP_REQ);
+  if (!msgConfig)
+    return NULL;
+
+  paramdef_t GNBSParams[] = GNBSPARAMS_DESC;
+  paramdef_t GNBParams[] = GNBPARAMS_DESC;
+  paramlist_def_t GNBParamList = {GNB_CONFIG_STRING_GNB_LIST, NULL, 0};
+  config_get(GNBSParams, sizeofArray(GNBSParams), NULL);
+  char aprefix[MAX_OPTNAME_SIZE * 2 + 8];
+  sprintf(aprefix, "%s.[%i]", GNB_CONFIG_STRING_GNB_LIST, 0);
+  int num_gnbs = GNBSParams[GNB_ACTIVE_GNBS_IDX].numelt;
+  AssertFatal(num_gnbs == 1, "Support only one gNB per process\n");
+
+  if (num_gnbs > 0) {
+    config_getlist(&GNBParamList, GNBParams, sizeofArray(GNBParams), NULL);
+    paramdef_t *gnbParms = GNBParamList.paramarray[0];
+    AssertFatal(gnbParms[GNB_GNB_ID_IDX].uptr != NULL, "gNB id %u is not defined in configuration file\n", 0);
+    e1ap_setup_req_t *e1Setup = &E1AP_SETUP_REQ(msgConfig);
+    msgConfig->ittiMsgHeader.destinationInstance = 0;
+    e1Setup->gNB_cu_up_id = *(gnbParms[GNB_GNB_ID_IDX].uptr);
+
+    paramdef_t PLMNParams[] = GNBPLMNPARAMS_DESC;
+    paramlist_def_t PLMNParamList = {GNB_CONFIG_STRING_PLMN_LIST, NULL, 0};
+    /* map parameter checking array instances to parameter definition array instances */
+    checkedparam_t config_check_PLMNParams[] = PLMNPARAMS_CHECK;
+
+    for (int I = 0; I < sizeofArray(PLMNParams); ++I)
+      PLMNParams[I].chkPptr = &(config_check_PLMNParams[I]);
+
+    config_getlist(&PLMNParamList, PLMNParams, sizeofArray(PLMNParams), aprefix);
+    int numPLMNs = PLMNParamList.numelt;
+    e1Setup->supported_plmns = numPLMNs;
+
+    for (int I = 0; I < numPLMNs; I++) {
+      e1Setup->plmns[I].mcc = *PLMNParamList.paramarray[I][GNB_MOBILE_COUNTRY_CODE_IDX].uptr;
+      e1Setup->plmns[I].mnc = *PLMNParamList.paramarray[I][GNB_MOBILE_NETWORK_CODE_IDX].uptr;
+      e1Setup->plmns[I].mnc = *PLMNParamList.paramarray[I][GNB_MNC_DIGIT_LENGTH].u8ptr;
+    }
+
+    e1Setup->remotePortF1U = *(GNBParamList.paramarray[0][GNB_REMOTE_S_PORTD_IDX].uptr);
+    e1Setup->localAddressF1U = strdup(*(GNBParamList.paramarray[0][GNB_LOCAL_S_ADDRESS_IDX].strptr));
+    e1Setup->localPortF1U = *(GNBParamList.paramarray[0][GNB_LOCAL_S_PORTD_IDX].uptr);
+    get_NGU_S1U_addr(&e1Setup->localAddressN3, &e1Setup->localPortN3);
+    e1Setup->remotePortN3 = GTPV1_U_PORT_NUMBER;
+
+    if (separate_CUUP_process) {
+      paramlist_def_t GNBE1ParamList = {GNB_CONFIG_STRING_E1_PARAMETERS, NULL, 0};
+      paramdef_t GNBE1Params[] = GNBE1PARAMS_DESC;
+      config_getlist(&GNBE1ParamList, GNBE1Params, sizeofArray(GNBE1Params), aprefix);
+      paramdef_t *e1Parms = GNBE1ParamList.paramarray[0];
+      strcpy(e1Setup->CUCP_e1_ip_address.ipv4_address, *(e1Parms[GNB_CONFIG_E1_IPV4_ADDRESS_CUCP].strptr));
+      e1Setup->CUCP_e1_ip_address.ipv4 = 1;
+      strcpy(e1Setup->CUUP_e1_ip_address.ipv4_address, *(e1Parms[GNB_CONFIG_E1_IPV4_ADDRESS_CUUP].strptr));
+      e1Setup->CUUP_e1_ip_address.ipv4 = 1;
+      e1Setup->cn_support = *e1Parms[GNB_CONFIG_E1_CN_SUPPORT].uptr;
+    }
+  }
+  return msgConfig;
+}