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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
*/
#ifndef _NR_PDCP_ENTITY_H_
#define _NR_PDCP_ENTITY_H_
#include <stdint.h>
#include "nr_pdcp_sdu.h"
typedef enum {
NR_PDCP_DRB_AM,
NR_PDCP_DRB_UM,
NR_PDCP_SRB
} nr_pdcp_entity_type_t;
typedef struct nr_pdcp_entity_t {
nr_pdcp_entity_type_t type;
/* functions provided by the PDCP module */
void (*recv_pdu)(struct nr_pdcp_entity_t *entity, char *buffer, int size);
void (*recv_sdu)(struct nr_pdcp_entity_t *entity, char *buffer, int size,
int sdu_id);
void (*delete)(struct nr_pdcp_entity_t *entity);
/* set_security: pass -1 to integrity_algorithm / ciphering_algorithm
* to keep the current algorithm
* pass NULL to integrity_key / ciphering_key
* to keep the current key
*/
void (*set_security)(struct nr_pdcp_entity_t *entity,
int integrity_algorithm,
char *integrity_key,
int ciphering_algorithm,
char *ciphering_key);
void (*set_time)(struct nr_pdcp_entity_t *entity, uint64_t now);
/* callbacks provided to the PDCP module */
void (*deliver_sdu)(void *deliver_sdu_data, struct nr_pdcp_entity_t *entity,
char *buf, int size);
void *deliver_sdu_data;
void (*deliver_pdu)(void *deliver_pdu_data, struct nr_pdcp_entity_t *entity,
char *buf, int size, int sdu_id);
void *deliver_pdu_data;
/* configuration variables */
int rb_id;
int pdusession_id;
int has_sdap;
int has_sdapULheader;
int has_sdapDLheader;
int sn_size; /* SN size, in bits */
int t_reordering; /* unit: ms */
int discard_timer; /* unit: ms */
int sn_max; /* (2^SN_size) - 1 */
int window_size; /* 2^(SN_size - 1) */
/* state variables */
uint32_t tx_next;
uint32_t rx_next;
uint32_t rx_deliv;
uint32_t rx_reord;
/* set to the latest know time by the user of the module. Unit: ms */
uint64_t t_current;
/* timers (stores the ms of activation, 0 means not active) */
int t_reordering_start;
/* security */
int has_ciphering;
int has_integrity;
int ciphering_algorithm;
int integrity_algorithm;
unsigned char ciphering_key[16];
unsigned char integrity_key[16];
void *security_context;
void (*cipher)(void *security_context,
unsigned char *buffer, int length,
int bearer, int count, int direction);
void (*free_security)(void *security_context);
void *integrity_context;
void (*integrity)(void *integrity_context, unsigned char *out,
unsigned char *buffer, int length,
int bearer, int count, int direction);
void (*free_integrity)(void *integrity_context);
/* security/integrity algorithms need to know uplink/downlink information
* which is reverse for gnb and ue, so we need to know if this
* pdcp entity is for a gnb or an ue
*/
int is_gnb;
/* rx management */
nr_pdcp_sdu_t *rx_list;
int rx_size;
int rx_maxsize;
} nr_pdcp_entity_t;
nr_pdcp_entity_t *new_nr_pdcp_entity(
nr_pdcp_entity_type_t type,
int is_gnb, int rb_id, int pdusession_id,int has_sdap,
int has_sdapULheader,int has_sdapDLheader,
void (*deliver_sdu)(void *deliver_sdu_data, struct nr_pdcp_entity_t *entity,
char *buf, int size),
void *deliver_sdu_data,
void (*deliver_pdu)(void *deliver_pdu_data, struct nr_pdcp_entity_t *entity,
char *buf, int size, int sdu_id),
void *deliver_pdu_data,
int sn_size,
int t_reordering,
int discard_timer,
int ciphering_algorithm,
int integrity_algorithm,
unsigned char *ciphering_key,
unsigned char *integrity_key);
void nr_DRB_preconfiguration(uint16_t crnti);
#endif /* _NR_PDCP_ENTITY_H_ */