mirror of https://github.com/pvnis/srsRAN_4G.git
You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
143 lines
4.6 KiB
C++
143 lines
4.6 KiB
C++
/*
|
|
* Copyright 2013-2019 Software Radio Systems Limited
|
|
*
|
|
* This file is part of srsLTE.
|
|
*
|
|
* srsLTE is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU Affero General Public License as
|
|
* published by the Free Software Foundation, either version 3 of
|
|
* the License, or (at your option) any later version.
|
|
*
|
|
* srsLTE is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU Affero General Public License for more details.
|
|
*
|
|
* A copy of the GNU Affero General Public License can be found in
|
|
* the LICENSE file in the top-level directory of this distribution
|
|
* and at http://www.gnu.org/licenses/.
|
|
*
|
|
*/
|
|
|
|
#ifndef SRSLTE_PDCP_ENTITY_BASE_H
|
|
#define SRSLTE_PDCP_ENTITY_BASE_H
|
|
|
|
#include "srslte/common/buffer_pool.h"
|
|
#include "srslte/common/common.h"
|
|
#include "srslte/common/log.h"
|
|
#include "srslte/common/security.h"
|
|
#include "srslte/common/threads.h"
|
|
#include "srslte/interfaces/ue_interfaces.h"
|
|
#include <mutex>
|
|
|
|
namespace srslte {
|
|
|
|
/****************************************************************************
|
|
* Structs and Defines common to both LTE and NR
|
|
* Ref: 3GPP TS 36.323 v10.1.0 and TS 38.323 v15.2.0
|
|
***************************************************************************/
|
|
|
|
#define PDCP_PDU_TYPE_PDCP_STATUS_REPORT 0x0
|
|
#define PDCP_PDU_TYPE_INTERSPERSED_ROHC_FEEDBACK_PACKET 0x1
|
|
|
|
// Maximum supported PDCP SDU size is 9000 bytes.
|
|
// See TS 38.323 v15.2.0, section 4.3.1
|
|
#define PDCP_MAX_SDU_SIZE 9000
|
|
|
|
typedef enum {
|
|
PDCP_D_C_CONTROL_PDU = 0,
|
|
PDCP_D_C_DATA_PDU,
|
|
PDCP_D_C_N_ITEMS,
|
|
} pdcp_d_c_t;
|
|
static const char pdcp_d_c_text[PDCP_D_C_N_ITEMS][20] = {"Control PDU", "Data PDU"};
|
|
|
|
/****************************************************************************
|
|
* PDCP Entity interface
|
|
* Common interface for LTE and NR PDCP entities
|
|
***************************************************************************/
|
|
class pdcp_entity_base
|
|
{
|
|
public:
|
|
pdcp_entity_base(srslte::timer_handler* timers_, srslte::log* log_);
|
|
virtual ~pdcp_entity_base();
|
|
virtual void reset() = 0;
|
|
virtual void reestablish() = 0;
|
|
|
|
bool is_active() { return active; }
|
|
bool is_srb() { return cfg.rb_type == PDCP_RB_IS_SRB; }
|
|
bool is_drb() { return cfg.rb_type == PDCP_RB_IS_DRB; }
|
|
|
|
// RRC interface
|
|
void enable_integrity() { do_integrity = true; }
|
|
void enable_encryption() { do_encryption = true; }
|
|
|
|
void config_security(uint8_t* k_rrc_enc_,
|
|
uint8_t* k_rrc_int_,
|
|
uint8_t* k_up_enc_,
|
|
uint8_t* k_up_int_, // NR Only, pass nullptr in LTE
|
|
CIPHERING_ALGORITHM_ID_ENUM cipher_algo_,
|
|
INTEGRITY_ALGORITHM_ID_ENUM integ_algo_);
|
|
|
|
// GW/SDAP/RRC interface
|
|
void write_sdu(unique_byte_buffer_t sdu, bool blocking);
|
|
|
|
// RLC interface
|
|
void write_pdu(unique_byte_buffer_t pdu);
|
|
|
|
// COUNT, HFN and SN helpers
|
|
uint32_t HFN(uint32_t count);
|
|
uint32_t SN(uint32_t count);
|
|
uint32_t COUNT(uint32_t hfn, uint32_t sn);
|
|
|
|
protected:
|
|
srslte::log* log = nullptr;
|
|
srslte::timer_handler* timers = nullptr;
|
|
|
|
bool active = false;
|
|
uint32_t lcid = 0;
|
|
bool do_integrity = false;
|
|
bool do_encryption = false;
|
|
|
|
pdcp_config_t cfg = {1,
|
|
PDCP_RB_IS_DRB,
|
|
SECURITY_DIRECTION_DOWNLINK,
|
|
SECURITY_DIRECTION_UPLINK,
|
|
PDCP_SN_LEN_12,
|
|
pdcp_t_reordering_t::ms500,
|
|
pdcp_discard_timer_t::infinity};
|
|
|
|
std::mutex mutex;
|
|
|
|
uint8_t k_rrc_enc[32] = {};
|
|
uint8_t k_rrc_int[32] = {};
|
|
uint8_t k_up_enc[32] = {};
|
|
uint8_t k_up_int[32] = {};
|
|
|
|
CIPHERING_ALGORITHM_ID_ENUM cipher_algo = CIPHERING_ALGORITHM_ID_EEA0;
|
|
INTEGRITY_ALGORITHM_ID_ENUM integ_algo = INTEGRITY_ALGORITHM_ID_EIA0;
|
|
|
|
void integrity_generate(uint8_t* msg, uint32_t msg_len, uint32_t count, uint8_t* mac);
|
|
bool integrity_verify(uint8_t* msg, uint32_t msg_len, uint32_t count, uint8_t* mac);
|
|
void cipher_encrypt(uint8_t* msg, uint32_t msg_len, uint32_t count, uint8_t* ct);
|
|
void cipher_decrypt(uint8_t* ct, uint32_t ct_len, uint32_t count, uint8_t* msg);
|
|
};
|
|
|
|
inline uint32_t pdcp_entity_base::HFN(uint32_t count)
|
|
{
|
|
return (count >> cfg.sn_len);
|
|
}
|
|
|
|
inline uint32_t pdcp_entity_base::SN(uint32_t count)
|
|
{
|
|
return count & (0xFFFFFFFF >> (32 - cfg.sn_len));
|
|
}
|
|
|
|
inline uint32_t pdcp_entity_base::COUNT(uint32_t hfn, uint32_t sn)
|
|
{
|
|
return (hfn << cfg.sn_len) | sn;
|
|
}
|
|
|
|
} // namespace srslte
|
|
|
|
#endif // SRSLTE_PDCP_ENTITY_BASE_H
|