87 lines
3.0 KiB
C
87 lines
3.0 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 ngap_gNB_ue_context.c
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* \brief ngap UE context management within gNB
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* \author Yoshio INOUE, Masayuki HARADA
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* \date 2020
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* \version 0.1
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* \email: yoshio.inoue@fujitsu.com,masayuki.harada@fujitsu.com (yoshio.inoue%40fujitsu.com%2cmasayuki.harada%40fujitsu.com)
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*/
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#include "ngap_gNB_ue_context.h"
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#include <stdint.h>
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#include <stdio.h>
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#include "PHY/defs_common.h"
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#include "T.h"
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#include "common/utils/T/T.h"
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#include "ngap_common.h"
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#include "tree.h"
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/* Tree of UE ordered by gNB_ue_ngap_id's
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* NO INSTANCE, the 32 bits id is large enough to handle all UEs, regardless the cell, gNB, ...
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*/
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static RB_HEAD(ngap_ue_map, ngap_gNB_ue_context_s) ngap_ue_head = RB_INITIALIZER(&ngap_ue_head);
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/* Generate the tree management functions prototypes */
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RB_PROTOTYPE(ngap_ue_map, ngap_gNB_ue_context_s, entries, ngap_gNB_compare_gNB_ue_ngap_id);
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static int ngap_gNB_compare_gNB_ue_ngap_id(struct ngap_gNB_ue_context_s *p1, struct ngap_gNB_ue_context_s *p2)
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{
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if (p1->gNB_ue_ngap_id > p2->gNB_ue_ngap_id) {
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return 1;
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}
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if (p1->gNB_ue_ngap_id < p2->gNB_ue_ngap_id) {
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return -1;
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}
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return 0;
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}
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/* Generate the tree management functions */
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RB_GENERATE(ngap_ue_map, ngap_gNB_ue_context_s, entries,
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ngap_gNB_compare_gNB_ue_ngap_id);
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void ngap_store_ue_context(struct ngap_gNB_ue_context_s *ue_desc_p)
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{
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if (RB_INSERT(ngap_ue_map, &ngap_ue_head, ue_desc_p))
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LOG_E(NGAP, "Bug in UE uniq number allocation %u, we try to add a existing UE\n", ue_desc_p->gNB_ue_ngap_id);
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return;
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}
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struct ngap_gNB_ue_context_s *ngap_get_ue_context(uint32_t gNB_ue_ngap_id)
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{
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ngap_gNB_ue_context_t temp = {.gNB_ue_ngap_id = gNB_ue_ngap_id};
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return RB_FIND(ngap_ue_map, &ngap_ue_head, &temp);
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}
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struct ngap_gNB_ue_context_s *ngap_detach_ue_context(uint32_t gNB_ue_ngap_id)
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{
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struct ngap_gNB_ue_context_s *tmp = ngap_get_ue_context(gNB_ue_ngap_id);
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if (tmp == NULL) {
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NGAP_ERROR("Trying to free a NULL UE context, %u\n", gNB_ue_ngap_id);
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return NULL;
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}
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RB_REMOVE(ngap_ue_map, &ngap_ue_head, tmp);
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return tmp;
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}
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