Robert Schmidt
4c2bfe7a1f
To allow to send F1 messages to multiple DUs from the CU, we need to send these messages via different assoc_id (SCTP association ID, basically akin to a file descriptor). Currently, the assoc_id is stored in a context at the F1 module and retrieved in f1ap_itti_send_sctp_data_req(). To facilitate a later change towards indicating (from the RRC) to which assoc_id (hence, DU) to send a message, we refactor all CU_send_*()/DU_send_*() functions to take the assoc_id as a parameter to which to send messages. In this commit, we then pass the assoc_id from the context. A later commit changes this (at the CU) to pass the assoc_id from the message to be sent.
281 lines
12 KiB
C
281 lines
12 KiB
C
/*
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* Licensed to the OpenAirInterface (OAI) Software Alliance under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership.
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* The OpenAirInterface Software Alliance licenses this file to You under
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* the OAI Public License, Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.openairinterface.org/?page_id=698
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*-------------------------------------------------------------------------------
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* For more information about the OpenAirInterface (OAI) Software Alliance:
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* contact@openairinterface.org
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*/
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/*! \file f1ap_du_rrc_message_transfer.c
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* \brief f1ap rrc message transfer for DU
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* \author EURECOM/NTUST
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* \date 2018
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* \version 0.1
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* \company Eurecom
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* \email: navid.nikaein@eurecom.fr, bing-kai.hong@eurecom.fr
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* \note
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* \warning
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*/
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#include "f1ap_common.h"
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#include "f1ap_encoder.h"
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#include "f1ap_itti_messaging.h"
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#include "f1ap_du_rrc_message_transfer.h"
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#include "uper_decoder.h"
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#include "NR_DL-CCCH-Message.h"
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#include "NR_UL-CCCH-Message.h"
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#include "NR_DL-DCCH-Message.h"
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#include "NR_UL-DCCH-Message.h"
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// for SRB1_logicalChannelConfig_defaultValue
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#include "rrc_extern.h"
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#include "common/ran_context.h"
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#include "openair2/RRC/NR/rrc_gNB_UE_context.h"
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#include "asn1_msg.h"
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#include "intertask_interface.h"
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#include "LAYER2/NR_MAC_gNB/mac_proto.h"
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#include <openair3/ocp-gtpu/gtp_itf.h>
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#include "openair2/LAYER2/NR_MAC_gNB/mac_rrc_dl_handler.h"
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/* DL RRC Message Transfer */
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int DU_handle_DL_RRC_MESSAGE_TRANSFER(instance_t instance, sctp_assoc_t assoc_id, uint32_t stream, F1AP_F1AP_PDU_t *pdu)
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{
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F1AP_DLRRCMessageTransfer_t *container;
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F1AP_DLRRCMessageTransferIEs_t *ie;
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int executeDuplication;
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//uint64_t subscriberProfileIDforRFP;
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//uint64_t rAT_FrequencySelectionPriority;
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DevAssert(pdu != NULL);
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container = &pdu->choice.initiatingMessage->value.choice.DLRRCMessageTransfer;
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/* GNB_CU_UE_F1AP_ID */
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F1AP_FIND_PROTOCOLIE_BY_ID(F1AP_DLRRCMessageTransferIEs_t, ie, container,
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F1AP_ProtocolIE_ID_id_gNB_CU_UE_F1AP_ID, true);
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uint32_t cu_ue_f1ap_id = ie->value.choice.GNB_CU_UE_F1AP_ID;
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/* GNB_DU_UE_F1AP_ID */
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F1AP_FIND_PROTOCOLIE_BY_ID(F1AP_DLRRCMessageTransferIEs_t, ie, container,
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F1AP_ProtocolIE_ID_id_gNB_DU_UE_F1AP_ID, true);
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uint32_t du_ue_f1ap_id = ie->value.choice.GNB_DU_UE_F1AP_ID;
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/* optional */
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/* oldgNB_DU_UE_F1AP_ID */
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uint32_t *old_gNB_DU_ue_id = NULL;
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uint32_t old_gNB_DU_ue_id_stack = 0;
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F1AP_FIND_PROTOCOLIE_BY_ID(F1AP_DLRRCMessageTransferIEs_t, ie, container,
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F1AP_ProtocolIE_ID_id_oldgNB_DU_UE_F1AP_ID, false);
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if (ie) {
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/* strange: it is not named OLD_GNB_DU_UE... */
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old_gNB_DU_ue_id_stack = ie->value.choice.GNB_DU_UE_F1AP_ID_1;
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old_gNB_DU_ue_id = &old_gNB_DU_ue_id_stack;
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gtpv1u_update_ue_id(getCxt(instance)->gtpInst, old_gNB_DU_ue_id_stack, du_ue_f1ap_id);
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}
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/* mandatory */
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/* SRBID */
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F1AP_FIND_PROTOCOLIE_BY_ID(F1AP_DLRRCMessageTransferIEs_t, ie, container,
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F1AP_ProtocolIE_ID_id_SRBID, true);
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uint64_t srb_id = ie->value.choice.SRBID;
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LOG_D(F1AP, "srb_id %lu \n", srb_id);
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/* optional */
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/* ExecuteDuplication */
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if (0) {
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F1AP_FIND_PROTOCOLIE_BY_ID(F1AP_DLRRCMessageTransferIEs_t, ie, container,
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F1AP_ProtocolIE_ID_id_ExecuteDuplication, true);
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executeDuplication = ie->value.choice.ExecuteDuplication;
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LOG_D(F1AP, "ExecuteDuplication %d \n", executeDuplication);
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}
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// issue in here
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/* mandatory */
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/* RRC Container */
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F1AP_FIND_PROTOCOLIE_BY_ID(F1AP_DLRRCMessageTransferIEs_t, ie, container,
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F1AP_ProtocolIE_ID_id_RRCContainer, true);
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/* optional */
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/* RAT_FrequencyPriorityInformation */
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if (0) {
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F1AP_FIND_PROTOCOLIE_BY_ID(F1AP_DLRRCMessageTransferIEs_t, ie, container,
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F1AP_ProtocolIE_ID_id_RAT_FrequencyPriorityInformation, true);
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switch(ie->value.choice.RAT_FrequencyPriorityInformation.present) {
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case F1AP_RAT_FrequencyPriorityInformation_PR_eNDC:
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//subscriberProfileIDforRFP = ie->value.choice.RAT_FrequencyPriorityInformation.choice.subscriberProfileIDforRFP;
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break;
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case F1AP_RAT_FrequencyPriorityInformation_PR_nGRAN:
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//rAT_FrequencySelectionPriority = ie->value.choice.RAT_FrequencyPriorityInformation.choice.rAT_FrequencySelectionPriority;
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break;
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default:
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LOG_W(F1AP, "unhandled IE RAT_FrequencyPriorityInformation.present\n");
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break;
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}
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}
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f1ap_dl_rrc_message_t dl_rrc = {
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.gNB_CU_ue_id = cu_ue_f1ap_id,
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.gNB_DU_ue_id = du_ue_f1ap_id,
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.old_gNB_DU_ue_id = old_gNB_DU_ue_id,
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.rrc_container_length = ie->value.choice.RRCContainer.size,
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.rrc_container = ie->value.choice.RRCContainer.buf,
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.srb_id = srb_id
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};
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dl_rrc_message_transfer(&dl_rrc);
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return 0;
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}
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/* UL RRC Message Transfer */
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int DU_send_INITIAL_UL_RRC_MESSAGE_TRANSFER(sctp_assoc_t assoc_id, const f1ap_initial_ul_rrc_message_t *msg)
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{
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F1AP_F1AP_PDU_t pdu= {0};
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F1AP_InitialULRRCMessageTransfer_t *out;
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uint8_t *buffer=NULL;
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uint32_t len=0;
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/* Create */
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/* 0. Message Type */
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pdu.present = F1AP_F1AP_PDU_PR_initiatingMessage;
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asn1cCalloc(pdu.choice.initiatingMessage, tmp);
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tmp->procedureCode = F1AP_ProcedureCode_id_InitialULRRCMessageTransfer;
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tmp->criticality = F1AP_Criticality_ignore;
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tmp->value.present = F1AP_InitiatingMessage__value_PR_InitialULRRCMessageTransfer;
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out = &tmp->value.choice.InitialULRRCMessageTransfer;
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/* mandatory */
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/* c1. GNB_DU_UE_F1AP_ID */
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asn1cSequenceAdd(out->protocolIEs.list, F1AP_InitialULRRCMessageTransferIEs_t, ie1);
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ie1->id = F1AP_ProtocolIE_ID_id_gNB_DU_UE_F1AP_ID;
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ie1->criticality = F1AP_Criticality_reject;
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ie1->value.present = F1AP_InitialULRRCMessageTransferIEs__value_PR_GNB_DU_UE_F1AP_ID;
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ie1->value.choice.GNB_DU_UE_F1AP_ID = msg->gNB_DU_ue_id;
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/* mandatory */
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/* c2. NRCGI */
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asn1cSequenceAdd(out->protocolIEs.list, F1AP_InitialULRRCMessageTransferIEs_t, ie2);
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ie2->id = F1AP_ProtocolIE_ID_id_NRCGI;
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ie2->criticality = F1AP_Criticality_reject;
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ie2->value.present = F1AP_InitialULRRCMessageTransferIEs__value_PR_NRCGI;
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//Fixme: takes always the first cell
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addnRCGI(ie2->value.choice.NRCGI, &getCxt(0)->setupReq.cell[0].info);
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/* mandatory */
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/* c3. C_RNTI */ // 16
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asn1cSequenceAdd(out->protocolIEs.list, F1AP_InitialULRRCMessageTransferIEs_t, ie3);
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ie3->id = F1AP_ProtocolIE_ID_id_C_RNTI;
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ie3->criticality = F1AP_Criticality_reject;
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ie3->value.present = F1AP_InitialULRRCMessageTransferIEs__value_PR_C_RNTI;
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ie3->value.choice.C_RNTI = msg->crnti;
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/* mandatory */
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/* c4. RRCContainer */
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asn1cSequenceAdd(out->protocolIEs.list, F1AP_InitialULRRCMessageTransferIEs_t, ie4);
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ie4->id = F1AP_ProtocolIE_ID_id_RRCContainer;
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ie4->criticality = F1AP_Criticality_reject;
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ie4->value.present = F1AP_InitialULRRCMessageTransferIEs__value_PR_RRCContainer;
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OCTET_STRING_fromBuf(&ie4->value.choice.RRCContainer, (const char *)msg->rrc_container, msg->rrc_container_length);
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/* optional */
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/* c5. DUtoCURRCContainer */
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if (msg->du2cu_rrc_container != NULL) {
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asn1cSequenceAdd(out->protocolIEs.list, F1AP_InitialULRRCMessageTransferIEs_t, ie5);
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ie5->id = F1AP_ProtocolIE_ID_id_DUtoCURRCContainer;
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ie5->criticality = F1AP_Criticality_reject;
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ie5->value.present = F1AP_InitialULRRCMessageTransferIEs__value_PR_DUtoCURRCContainer;
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OCTET_STRING_fromBuf(&ie5->value.choice.DUtoCURRCContainer,
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(const char *)msg->du2cu_rrc_container,
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msg->du2cu_rrc_container_length);
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}
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/* mandatory */
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/* c6. Transaction ID (integer value) */
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asn1cSequenceAdd(out->protocolIEs.list, F1AP_InitialULRRCMessageTransferIEs_t, ie6);
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ie6->id = F1AP_ProtocolIE_ID_id_TransactionID;
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ie6->criticality = F1AP_Criticality_ignore;
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ie6->value.present = F1AP_InitialULRRCMessageTransferIEs__value_PR_TransactionID;
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ie6->value.choice.TransactionID = F1AP_get_next_transaction_identifier(0, 0);
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/* encode */
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if (f1ap_encode_pdu(&pdu, &buffer, &len) < 0) {
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LOG_E(F1AP, "Failed to encode F1 INITIAL UL RRC MESSAGE TRANSFER\n");
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return -1;
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}
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f1ap_itti_send_sctp_data_req(assoc_id, buffer, len);
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return 0;
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}
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int DU_send_UL_NR_RRC_MESSAGE_TRANSFER(sctp_assoc_t assoc_id, const f1ap_ul_rrc_message_t *msg)
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{
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F1AP_F1AP_PDU_t pdu= {0};
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F1AP_ULRRCMessageTransfer_t *out;
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uint8_t *buffer = NULL;
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uint32_t len;
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LOG_D(F1AP,
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"size %d UE RNTI %x in SRB %d\n",
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msg->rrc_container_length,
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msg->gNB_DU_ue_id,
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msg->srb_id);
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//for (int i = 0;i < msg->rrc_container_length; i++)
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// printf("%02x ", msg->rrc_container[i]);
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//printf("\n");
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/* Create */
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/* 0. Message Type */
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pdu.present = F1AP_F1AP_PDU_PR_initiatingMessage;
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asn1cCalloc(pdu.choice.initiatingMessage, tmp);
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tmp->procedureCode = F1AP_ProcedureCode_id_ULRRCMessageTransfer;
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tmp->criticality = F1AP_Criticality_ignore;
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tmp->value.present = F1AP_InitiatingMessage__value_PR_ULRRCMessageTransfer;
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out = &tmp->value.choice.ULRRCMessageTransfer;
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/* mandatory */
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/* c1. GNB_CU_UE_F1AP_ID */
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asn1cSequenceAdd(out->protocolIEs.list, F1AP_ULRRCMessageTransferIEs_t, ie1);
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ie1->id = F1AP_ProtocolIE_ID_id_gNB_CU_UE_F1AP_ID;
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ie1->criticality = F1AP_Criticality_reject;
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ie1->value.present = F1AP_ULRRCMessageTransferIEs__value_PR_GNB_CU_UE_F1AP_ID;
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ie1->value.choice.GNB_CU_UE_F1AP_ID = msg->gNB_CU_ue_id;
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/* mandatory */
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/* c2. GNB_DU_UE_F1AP_ID */
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asn1cSequenceAdd(out->protocolIEs.list, F1AP_ULRRCMessageTransferIEs_t, ie2);
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ie2->id = F1AP_ProtocolIE_ID_id_gNB_DU_UE_F1AP_ID;
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ie2->criticality = F1AP_Criticality_reject;
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ie2->value.present = F1AP_ULRRCMessageTransferIEs__value_PR_GNB_DU_UE_F1AP_ID;
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ie2->value.choice.GNB_DU_UE_F1AP_ID = msg->gNB_DU_ue_id;
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/* mandatory */
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/* c3. SRBID */
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asn1cSequenceAdd(out->protocolIEs.list, F1AP_ULRRCMessageTransferIEs_t, ie3);
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ie3->id = F1AP_ProtocolIE_ID_id_SRBID;
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ie3->criticality = F1AP_Criticality_reject;
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ie3->value.present = F1AP_ULRRCMessageTransferIEs__value_PR_SRBID;
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ie3->value.choice.SRBID = msg->srb_id;
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// issue in here
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/* mandatory */
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/* c4. RRCContainer */
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asn1cSequenceAdd(out->protocolIEs.list, F1AP_ULRRCMessageTransferIEs_t, ie4);
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ie4->id = F1AP_ProtocolIE_ID_id_RRCContainer;
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ie4->criticality = F1AP_Criticality_reject;
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ie4->value.present = F1AP_ULRRCMessageTransferIEs__value_PR_RRCContainer;
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OCTET_STRING_fromBuf(&ie4->value.choice.RRCContainer,
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(const char *) msg->rrc_container,
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msg->rrc_container_length);
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/* encode */
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if (f1ap_encode_pdu(&pdu, &buffer, &len) < 0) {
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LOG_E(F1AP, "Failed to encode F1 UL RRC MESSAGE TRANSFER \n");
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return -1;
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}
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f1ap_itti_send_sctp_data_req(assoc_id, buffer, len);
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return 0;
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}
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