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openairinterface5g/openair2/COMMON/ngap_messages_def.h
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Guido Casati bc9c59f186 Add NGAP RAN Status Transfer enc/dec and handlers (UL and DL) 
According to 4.9.1.3.3 of 3GPP TS 23.502:

> 2a. - 2c. The S-RAN sends the Uplink RAN Status Transfer message to the S-AMF,
> as specified in TS 36.300 [46] and TS 38.300 [9]. The S-RAN may omit sending
> this message if none of the radio bearers of the UE shall be treated with PDCP status preservation.

TS 38.300 says:
> For DRBs not configured with DAPS, the source gNB sends the SN STATUS TRANSFER message to the target
> gNB to convey the uplink PDCP SN receiver status and the downlink PDCP SN transmitter status of DRBs for
> which PDCP status preservation applies (i.e. for RLC AM). The uplink PDCP SN receiver status includes at
> least the PDCP SN of the first missing UL PDCP SDU and may include a bit map of the receive status of the out
> of sequence UL PDCP SDUs that the UE needs to retransmit in the target cell, if any. The downlink PDCP SN
> transmitter status indicates the next PDCP SN that the target gNB shall assign to new PDCP SDUs, not having a
> PDCP SN yet.

i.e., for DRBs for which PDCP status preservation applies (i.e. for RLC AM), which is is our case.

This commit introduces full support for NG-RAN Status Transfer message handling
(TS 38.413 §9.2.3.13-14) in CU. It enables correct state transfer of PDCP COUNT
values (SN + HFN) during mobility or recovery scenarios.

Summary of changes - NGAP:
* Added encoding/decoding support for UL/DL RAN Status Transfer message
* Defined structures for: ngap_drb_count_value_t, ngap_drb_status_t,
  ngap_ran_status_container_t, ngap_ran_status_transfer_t
2025-09-18 11:34:31 +02:00

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/*
* 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
*/
/*
* ngap_messages_def.h
*
* Created on: 2020
* Author: Yoshio INOUE, Masayuki HARADA
* Email: yoshio.inoue@fujitsu.com,masayuki.harada@fujitsu.com (yoshio.inoue%40fujitsu.com%2cmasayuki.harada%40fujitsu.com)
*/
/* Messages for NGAP logging */
MESSAGE_DEF(NGAP_UPLINK_NAS_LOG , MESSAGE_PRIORITY_MED, IttiMsgText , ngap_uplink_nas_log)
MESSAGE_DEF(NGAP_UE_CAPABILITY_IND_LOG , MESSAGE_PRIORITY_MED, IttiMsgText , ngap_ue_capability_ind_log)
MESSAGE_DEF(NGAP_INITIAL_CONTEXT_SETUP_LOG , MESSAGE_PRIORITY_MED, IttiMsgText , ngap_initial_context_setup_log)
MESSAGE_DEF(NGAP_NAS_NON_DELIVERY_IND_LOG , MESSAGE_PRIORITY_MED, IttiMsgText , ngap_nas_non_delivery_ind_log)
MESSAGE_DEF(NGAP_DOWNLINK_NAS_LOG , MESSAGE_PRIORITY_MED, IttiMsgText , ngap_downlink_nas_log)
MESSAGE_DEF(NGAP_S1_SETUP_LOG , MESSAGE_PRIORITY_MED, IttiMsgText , ngap_s1_setup_log)
MESSAGE_DEF(NGAP_INITIAL_UE_MESSAGE_LOG , MESSAGE_PRIORITY_MED, IttiMsgText , ngap_initial_ue_message_log)
MESSAGE_DEF(NGAP_UE_CONTEXT_RELEASE_REQ_LOG, MESSAGE_PRIORITY_MED, IttiMsgText , ngap_ue_context_release_req_log)
MESSAGE_DEF(NGAP_UE_CONTEXT_RELEASE_COMMAND_LOG, MESSAGE_PRIORITY_MED, IttiMsgText , ngap_ue_context_release_command_log)
MESSAGE_DEF(NGAP_UE_CONTEXT_RELEASE_COMPLETE_LOG, MESSAGE_PRIORITY_MED, IttiMsgText , ngap_ue_context_release_complete_log)
MESSAGE_DEF(NGAP_UE_CONTEXT_RELEASE_LOG , MESSAGE_PRIORITY_MED, IttiMsgText , ngap_ue_context_release_log)
MESSAGE_DEF(NGAP_PDUSESSION_SETUP_REQUEST_LOG , MESSAGE_PRIORITY_MED, IttiMsgText , ngap_pdusession_setup_request_log)
MESSAGE_DEF(NGAP_PDUSESSION_SETUP_RESPONSE_LOG , MESSAGE_PRIORITY_MED, IttiMsgText , ngap_pdusession_setup_response_log)
MESSAGE_DEF(NGAP_PDUSESSION_MODIFY_REQUEST_LOG , MESSAGE_PRIORITY_MED, IttiMsgText , ngap_pdusession_modify_request_log)
MESSAGE_DEF(NGAP_PDUSESSION_MODIFY_RESPONSE_LOG , MESSAGE_PRIORITY_MED, IttiMsgText , ngap_pdusession_modify_response_log)
MESSAGE_DEF(NGAP_PAGING_LOG , MESSAGE_PRIORITY_MED, IttiMsgText , ngap_paging_log)
MESSAGE_DEF(NGAP_PDUSESSION_RELEASE_REQUEST_LOG , MESSAGE_PRIORITY_MED, IttiMsgText , ngap_pdusession_release_request_log)
MESSAGE_DEF(NGAP_PDUSESSION_RELEASE_RESPONSE_LOG , MESSAGE_PRIORITY_MED, IttiMsgText , ngap_pdusession_release_response_log)
MESSAGE_DEF(NGAP_ERROR_INDICATION_LOG , MESSAGE_PRIORITY_MED, IttiMsgText , ngap_error_indication_log)
MESSAGE_DEF(NGAP_PATH_SWITCH_REQ_LOG , MESSAGE_PRIORITY_MED, IttiMsgText , ngap_path_switch_req_log)
MESSAGE_DEF(NGAP_PATH_SWITCH_REQ_ACK_LOG , MESSAGE_PRIORITY_MED, IttiMsgText , ngap_path_switch_req_ack_log)
/* gNB application layer -> NGAP messages */
MESSAGE_DEF(NGAP_REGISTER_GNB_REQ , MESSAGE_PRIORITY_MED, ngap_register_gnb_req_t , ngap_register_gnb_req)
/* NGAP -> gNB application layer messages */
MESSAGE_DEF(NGAP_REGISTER_GNB_CNF , MESSAGE_PRIORITY_MED, ngap_register_gnb_cnf_t , ngap_register_gnb_cnf)
MESSAGE_DEF(NGAP_DEREGISTERED_GNB_IND , MESSAGE_PRIORITY_MED, ngap_deregistered_gnb_ind_t , ngap_deregistered_gnb_ind)
/* RRC -> NGAP messages */
MESSAGE_DEF(NGAP_NAS_FIRST_REQ , MESSAGE_PRIORITY_MED, ngap_nas_first_req_t , ngap_nas_first_req)
MESSAGE_DEF(NGAP_UPLINK_NAS , MESSAGE_PRIORITY_MED, ngap_uplink_nas_t , ngap_uplink_nas)
MESSAGE_DEF(NGAP_UE_CAPABILITIES_IND , MESSAGE_PRIORITY_MED, ngap_ue_cap_info_ind_t , ngap_ue_cap_info_ind)
MESSAGE_DEF(NGAP_INITIAL_CONTEXT_SETUP_RESP, MESSAGE_PRIORITY_MED, ngap_initial_context_setup_resp_t, ngap_initial_context_setup_resp)
MESSAGE_DEF(NGAP_INITIAL_CONTEXT_SETUP_FAIL, MESSAGE_PRIORITY_MED, ngap_initial_context_setup_fail_t, ngap_initial_context_setup_fail)
MESSAGE_DEF(NGAP_NAS_NON_DELIVERY_IND , MESSAGE_PRIORITY_MED, ngap_nas_non_delivery_ind_t , ngap_nas_non_delivery_ind)
MESSAGE_DEF(NGAP_UE_CONTEXT_RELEASE_RESP , MESSAGE_PRIORITY_MED, ngap_ue_release_resp_t , ngap_ue_release_resp)
MESSAGE_DEF(NGAP_UE_CONTEXT_RELEASE_COMPLETE, MESSAGE_PRIORITY_MED, ngap_ue_release_complete_t , ngap_ue_release_complete)
MESSAGE_DEF(NGAP_UE_CTXT_MODIFICATION_RESP , MESSAGE_PRIORITY_MED, ngap_ue_ctxt_modification_resp_t , ngap_ue_ctxt_modification_resp)
MESSAGE_DEF(NGAP_UE_CTXT_MODIFICATION_FAIL , MESSAGE_PRIORITY_MED, ngap_ue_ctxt_modification_fail_t , ngap_ue_ctxt_modification_fail)
MESSAGE_DEF(NGAP_PDUSESSION_SETUP_RESP , MESSAGE_PRIORITY_MED, ngap_pdusession_setup_resp_t , ngap_pdusession_setup_resp)
MESSAGE_DEF(NGAP_PDUSESSION_MODIFY_RESP , MESSAGE_PRIORITY_MED, ngap_pdusession_modify_resp_t , ngap_pdusession_modify_resp)
MESSAGE_DEF(NGAP_PDUSESSION_RELEASE_RESPONSE , MESSAGE_PRIORITY_MED, ngap_pdusession_release_resp_t , ngap_pdusession_release_resp)
MESSAGE_DEF(NGAP_HANDOVER_REQUIRED, MESSAGE_PRIORITY_MED, ngap_handover_required_t, ngap_handover_required)
MESSAGE_DEF(NGAP_HANDOVER_FAILURE, MESSAGE_PRIORITY_MED, ngap_handover_failure_t, ngap_handover_failure)
MESSAGE_DEF(NGAP_HANDOVER_REQUEST_ACKNOWLEDGE, MESSAGE_PRIORITY_MED, ngap_handover_request_ack_t, ngap_handover_request_ack)
MESSAGE_DEF(NGAP_HANDOVER_NOTIFY, MESSAGE_PRIORITY_MED, ngap_handover_notify_t, ngap_handover_notify)
MESSAGE_DEF(NGAP_UL_RAN_STATUS_TRANSFER, MESSAGE_PRIORITY_MED, ngap_ran_status_transfer_t, ngap_ul_ran_status_transfer)
MESSAGE_DEF(NGAP_DL_RAN_STATUS_TRANSFER, MESSAGE_PRIORITY_MED, ngap_ran_status_transfer_t, ngap_dl_ran_status_transfer)
/* NGAP -> RRC messages */
MESSAGE_DEF(NGAP_DOWNLINK_NAS , MESSAGE_PRIORITY_MED, ngap_downlink_nas_t , ngap_downlink_nas )
MESSAGE_DEF(NGAP_INITIAL_CONTEXT_SETUP_REQ , MESSAGE_PRIORITY_MED, ngap_initial_context_setup_req_t , ngap_initial_context_setup_req )
MESSAGE_DEF(NGAP_UE_CTXT_MODIFICATION_REQ , MESSAGE_PRIORITY_MED, ngap_ue_ctxt_modification_req_t , ngap_ue_ctxt_modification_req)
MESSAGE_DEF(NGAP_PAGING_IND , MESSAGE_PRIORITY_MED, ngap_paging_ind_t , ngap_paging_ind )
MESSAGE_DEF(NGAP_PDUSESSION_SETUP_REQ , MESSAGE_PRIORITY_MED, ngap_pdusession_setup_req_t , ngap_pdusession_setup_req )
MESSAGE_DEF(NGAP_PDUSESSION_MODIFY_REQ , MESSAGE_PRIORITY_MED, ngap_pdusession_modify_req_t , ngap_pdusession_modify_req )
MESSAGE_DEF(NGAP_PDUSESSION_RELEASE_COMMAND , MESSAGE_PRIORITY_MED, ngap_pdusession_release_command_t , ngap_pdusession_release_command)
MESSAGE_DEF(NGAP_UE_CONTEXT_RELEASE_COMMAND, MESSAGE_PRIORITY_MED, ngap_ue_release_command_t , ngap_ue_release_command)
MESSAGE_DEF(NGAP_HANDOVER_REQUEST, MESSAGE_PRIORITY_MED, ngap_handover_request_t, ngap_handover_request)
MESSAGE_DEF(NGAP_HANDOVER_COMMAND, MESSAGE_PRIORITY_MED, ngap_handover_command_t, ngap_handover_command)
/* NGAP <-> RRC messages (can be initiated either by MME or gNB) */
MESSAGE_DEF(NGAP_UE_CONTEXT_RELEASE_REQ , MESSAGE_PRIORITY_MED, ngap_ue_release_req_t , ngap_ue_release_req)
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