151 lines
4.7 KiB
C++
151 lines
4.7 KiB
C++
/*
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* Copyright 2013-2019 Software Radio Systems Limited
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*
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* This file is part of srsLTE.
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*
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* srsLTE is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as
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* published by the Free Software Foundation, either version 3 of
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* the License, or (at your option) any later version.
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*
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* srsLTE is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* A copy of the GNU Affero General Public License can be found in
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* the LICENSE file in the top-level directory of this distribution
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* and at http://www.gnu.org/licenses/.
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*
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*/
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#ifndef SRSLTE_PDCP_ENTITY_H
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#define SRSLTE_PDCP_ENTITY_H
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#include "srslte/common/buffer_pool.h"
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#include "srslte/common/log.h"
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#include "srslte/common/common.h"
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#include "srslte/interfaces/ue_interfaces.h"
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#include "srslte/common/security.h"
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#include "srslte/common/threads.h"
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#include "pdcp_interface.h"
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namespace srslte {
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/****************************************************************************
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* Structs and Defines
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* Ref: 3GPP TS 36.323 v10.1.0
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***************************************************************************/
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#define PDCP_CONTROL_MAC_I 0x00000000
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#define PDCP_PDU_TYPE_PDCP_STATUS_REPORT 0x0
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#define PDCP_PDU_TYPE_INTERSPERSED_ROHC_FEEDBACK_PACKET 0x1
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typedef enum{
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PDCP_D_C_CONTROL_PDU = 0,
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PDCP_D_C_DATA_PDU,
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PDCP_D_C_N_ITEMS,
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}pdcp_d_c_t;
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static const char pdcp_d_c_text[PDCP_D_C_N_ITEMS][20] = {"Control PDU",
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"Data PDU"};
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/****************************************************************************
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* PDCP Entity interface
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* Common interface for all PDCP entities
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***************************************************************************/
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class pdcp_entity : public pdcp_entity_interface
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{
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public:
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pdcp_entity();
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~pdcp_entity();
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void init(srsue::rlc_interface_pdcp *rlc_,
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srsue::rrc_interface_pdcp *rrc_,
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srsue::gw_interface_pdcp *gw_,
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srslte::log *log_,
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uint32_t lcid_,
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srslte_pdcp_config_t cfg_);
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void reset();
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void reestablish();
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bool is_active();
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// RRC interface
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void write_sdu(unique_byte_buffer sdu, bool blocking);
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void config_security(uint8_t *k_rrc_enc_,
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uint8_t *k_rrc_int_,
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uint8_t *k_up_enc_,
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CIPHERING_ALGORITHM_ID_ENUM cipher_algo_,
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INTEGRITY_ALGORITHM_ID_ENUM integ_algo_);
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void enable_integrity();
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void enable_encryption();
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uint32_t get_dl_count();
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uint32_t get_ul_count();
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// RLC interface
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void write_pdu(unique_byte_buffer pdu);
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private:
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byte_buffer_pool *pool;
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srslte::log *log;
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srsue::rlc_interface_pdcp *rlc;
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srsue::rrc_interface_pdcp *rrc;
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srsue::gw_interface_pdcp *gw;
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bool active;
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uint32_t lcid;
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srslte_pdcp_config_t cfg;
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uint8_t sn_len_bytes;
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bool do_integrity;
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bool do_encryption;
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uint32_t rx_count;
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uint32_t tx_count;
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uint8_t k_rrc_enc[32];
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uint8_t k_rrc_int[32];
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uint8_t k_up_enc[32];
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CIPHERING_ALGORITHM_ID_ENUM cipher_algo;
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INTEGRITY_ALGORITHM_ID_ENUM integ_algo;
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pthread_mutex_t mutex;
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void integrity_generate(uint8_t *msg,
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uint32_t msg_len,
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uint8_t *mac);
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bool integrity_verify(uint8_t *msg,
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uint32_t count,
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uint32_t msg_len,
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uint8_t *mac);
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void cipher_encrypt(uint8_t *msg,
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uint32_t msg_len,
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uint8_t *ct);
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void cipher_decrypt(uint8_t *ct,
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uint32_t count,
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uint32_t ct_len,
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uint8_t *msg);
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};
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/****************************************************************************
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* Pack/Unpack helper functions
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* Ref: 3GPP TS 36.323 v10.1.0
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***************************************************************************/
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void pdcp_pack_control_pdu(uint32_t sn, byte_buffer_t *sdu);
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void pdcp_unpack_control_pdu(byte_buffer_t *sdu, uint32_t *sn);
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void pdcp_pack_data_pdu_short_sn(uint32_t sn, byte_buffer_t *sdu);
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void pdcp_unpack_data_pdu_short_sn(byte_buffer_t *sdu, uint32_t *sn);
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void pdcp_pack_data_pdu_long_sn(uint32_t sn, byte_buffer_t *sdu);
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void pdcp_unpack_data_pdu_long_sn(byte_buffer_t *sdu, uint32_t *sn);
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} // namespace srslte
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#endif // SRSLTE_PDCP_ENTITY_H
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