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127 lines
3.8 KiB
C++
127 lines
3.8 KiB
C++
/**
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*
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* \section COPYRIGHT
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*
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* Copyright 2013-2020 Software Radio Systems Limited
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*
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* By using this file, you agree to the terms and conditions set
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* forth in the LICENSE file which can be found at the top level of
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* the distribution.
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*
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*/
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#ifndef SRSLTE_PDCP_ENTITY_LTE_H
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#define SRSLTE_PDCP_ENTITY_LTE_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/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 "srslte/interfaces/ue_interfaces.h"
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#include "srslte/upper/pdcp_entity_base.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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/****************************************************************************
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* LTE PDCP Entity
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* Class for LTE PDCP entities
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***************************************************************************/
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class pdcp_entity_lte final : public pdcp_entity_base
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{
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public:
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pdcp_entity_lte(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::task_sched_handle task_sched_,
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srslog::basic_logger& logger,
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uint32_t lcid_,
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pdcp_config_t cfg_);
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~pdcp_entity_lte() override;
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void reset() override;
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void reestablish() override;
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// GW/RRC interface
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void write_sdu(unique_byte_buffer_t sdu, int sn = -1) override;
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// RLC interface
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void write_pdu(unique_byte_buffer_t pdu) override;
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void notify_delivery(const std::vector<uint32_t>& pdcp_sns) override;
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// Config helpers
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bool check_valid_config();
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// TX SDU queue helper
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bool store_sdu(uint32_t tx_count, const unique_byte_buffer_t& pdu);
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// Getter for unacknowledged PDUs. Used for handover
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std::map<uint32_t, srslte::unique_byte_buffer_t> get_buffered_pdus() override;
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// Status report helper(s)
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void send_status_report() override;
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void handle_status_report_pdu(srslte::unique_byte_buffer_t pdu);
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// Internal state getters/setters
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void get_bearer_state(pdcp_lte_state_t* state) override;
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void set_bearer_state(const pdcp_lte_state_t& state) override;
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// Getter for the number of discard timers. Used for debugging.
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uint32_t nof_discard_timers() const;
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// Metrics helpers
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pdcp_bearer_metrics_t get_metrics() override;
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void reset_metrics() override;
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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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// State variables, as defined in TS 36 323, section 7.1
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pdcp_lte_state_t st = {};
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uint32_t reordering_window = 0;
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uint32_t maximum_pdcp_sn = 0;
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// Discard callback (discardTimer)
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class discard_callback;
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std::vector<unique_timer> discard_timers;
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unique_timer* get_discard_timer(uint32_t sn);
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void stop_discard_timer(uint32_t sn);
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// TX Queue
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uint32_t maximum_allocated_sns_window = 2048;
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std::map<uint32_t, unique_byte_buffer_t> undelivered_sdus_queue;
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void handle_control_pdu(srslte::unique_byte_buffer_t pdu);
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void handle_srb_pdu(srslte::unique_byte_buffer_t pdu);
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void handle_um_drb_pdu(srslte::unique_byte_buffer_t pdu);
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void handle_am_drb_pdu(srslte::unique_byte_buffer_t pdu);
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};
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// Discard callback (discardTimer)
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class pdcp_entity_lte::discard_callback
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{
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public:
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discard_callback(pdcp_entity_lte* parent_, uint32_t sn_)
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{
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parent = parent_;
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discard_sn = sn_;
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};
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void operator()(uint32_t timer_id);
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private:
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pdcp_entity_lte* parent;
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uint32_t discard_sn;
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};
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} // namespace srslte
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#endif // SRSLTE_PDCP_ENTITY_LTE_H
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