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90 lines
3.0 KiB
C++
90 lines
3.0 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_NR_H
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#define SRSLTE_PDCP_ENTITY_NR_H
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#include "pdcp_entity_base.h"
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#include "srslte/common/buffer_pool.h"
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#include "srslte/common/common.h"
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#include "srslte/common/interfaces_common.h"
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#include "srslte/common/log.h"
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#include "srslte/common/security.h"
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#include "srslte/common/threads.h"
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#include <map>
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namespace srslte {
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/****************************************************************************
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* NR PDCP Entity
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* PDCP entity for 5G NR
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***************************************************************************/
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class pdcp_entity_nr : public pdcp_entity_base
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{
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public:
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pdcp_entity_nr();
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~pdcp_entity_nr();
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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::timers* timers_,
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srslte::log* log_,
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uint32_t lcid_,
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pdcp_config_t cfg_);
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void reset();
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void reestablish();
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// RRC interface
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void write_sdu(unique_byte_buffer_t sdu, bool blocking);
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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_t pdu);
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private:
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srsue::rlc_interface_pdcp* rlc = nullptr;
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srsue::rrc_interface_pdcp* rrc = nullptr;
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srsue::gw_interface_pdcp* gw = nullptr;
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// Reordering Queue
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std::map<uint32_t, unique_byte_buffer_t> reorder_queue;
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// State variables: 3GPP TS 38.323 v15.2.0, section 7.1
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uint32_t tx_next = 0; // COUNT value of next SDU to be transmitted.
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uint32_t rx_next = 0; // COUNT value of next SDU expected to be received.
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uint32_t rx_deliv = 0; // COUNT value of first SDU not delivered to upper layers, but still waited for.
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uint32_t rx_reord = 0; // COUNT value following the COUNT value of PDCP Data PDU which triggered t-Reordering.
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// Constants: 3GPP TS 38.323 v15.2.0, section 7.2
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uint32_t window_size = 0;
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// Packing/Unpacking Helper functions
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uint32_t read_data_header(const unique_byte_buffer_t& sdu);
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void write_data_header(const unique_byte_buffer_t& sdu, uint32_t sn);
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void extract_mac(const unique_byte_buffer_t& sdu, uint8_t* mac);
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void append_mac(const unique_byte_buffer_t& sdu, uint8_t* mac);
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};
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} // namespace srslte
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#endif // SRSLTE_PDCP_ENTITY_NR_H
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