Cedric Roux
10e021e96d
The code is forced to use nea2, no matter what the UE supports. After 2^18 PDCP packets, it will fail to work (we don't use HFN yet). These limitations will be fixed in later commits. The existing security function was not reused, because it does too much memory allocation and initializes the security context at each ciphering. So here comes nr_pdcp_security_nea2_cipher(). And also the ciphering is done inplace. To be changed if necessary.
106 lines
3.6 KiB
C
106 lines
3.6 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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#include "nr_pdcp_entity.h"
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#include "nr_pdcp_entity_drb_am.h"
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#include "nr_pdcp_security_nea2.h"
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#include "LOG/log.h"
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nr_pdcp_entity_t *new_nr_pdcp_entity_srb(
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int is_gnb, int rb_id,
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void (*deliver_sdu)(void *deliver_sdu_data, struct nr_pdcp_entity_t *entity,
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char *buf, int size),
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void *deliver_sdu_data,
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void (*deliver_pdu)(void *deliver_pdu_data, struct nr_pdcp_entity_t *entity,
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char *buf, int size, int sdu_id),
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void *deliver_pdu_data)
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{
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abort();
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}
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nr_pdcp_entity_t *new_nr_pdcp_entity_drb_am(
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int is_gnb, int rb_id,
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void (*deliver_sdu)(void *deliver_sdu_data, struct nr_pdcp_entity_t *entity,
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char *buf, int size),
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void *deliver_sdu_data,
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void (*deliver_pdu)(void *deliver_pdu_data, struct nr_pdcp_entity_t *entity,
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char *buf, int size, int sdu_id),
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void *deliver_pdu_data,
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int sn_size,
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int t_reordering,
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int discard_timer,
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int ciphering_algorithm,
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int integrity_algorithm,
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unsigned char *ciphering_key,
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unsigned char *integrity_key)
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{
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nr_pdcp_entity_drb_am_t *ret;
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ret = calloc(1, sizeof(nr_pdcp_entity_drb_am_t));
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if (ret == NULL) {
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LOG_E(PDCP, "%s:%d:%s: out of memory\n", __FILE__, __LINE__, __FUNCTION__);
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exit(1);
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}
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ret->common.recv_pdu = nr_pdcp_entity_drb_am_recv_pdu;
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ret->common.recv_sdu = nr_pdcp_entity_drb_am_recv_sdu;
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ret->common.set_integrity_key = nr_pdcp_entity_drb_am_set_integrity_key;
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ret->common.delete = nr_pdcp_entity_drb_am_delete;
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ret->common.deliver_sdu = deliver_sdu;
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ret->common.deliver_sdu_data = deliver_sdu_data;
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ret->common.deliver_pdu = deliver_pdu;
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ret->common.deliver_pdu_data = deliver_pdu_data;
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ret->rb_id = rb_id;
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ret->sn_size = sn_size;
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ret->t_reordering = t_reordering;
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ret->discard_timer = discard_timer;
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ret->common.maximum_nr_pdcp_sn = (1 << sn_size) - 1;
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if (ciphering_key != NULL && ciphering_algorithm != 0) {
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if (ciphering_algorithm != 2) {
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LOG_E(PDCP, "FATAL: only nea2 supported for the moment\n");
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exit(1);
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}
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ret->common.has_ciphering = 1;
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ret->common.ciphering_algorithm = ciphering_algorithm;
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memcpy(ret->common.ciphering_key, ciphering_key, 16);
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ret->common.security_context = nr_pdcp_security_nea2_init(ciphering_key);
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ret->common.cipher = nr_pdcp_security_nea2_cipher;
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ret->common.free_security = nr_pdcp_security_nea2_free_security;
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}
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ret->common.is_gnb = is_gnb;
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if (integrity_key != NULL) {
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printf("%s:%d:%s: TODO\n", __FILE__, __LINE__, __FUNCTION__);
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exit(1);
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}
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return (nr_pdcp_entity_t *)ret;
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}
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