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242 lines
10 KiB
C++
242 lines
10 KiB
C++
/**
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* Copyright 2013-2021 Software Radio Systems Limited
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*
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* This file is part of srsRAN.
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*
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* srsRAN 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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* srsRAN 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 SRSENB_RRC_H
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#define SRSENB_RRC_H
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#include "rrc_bearer_cfg.h"
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#include "rrc_cell_cfg.h"
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#include "rrc_metrics.h"
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#include "srsenb/hdr/common/common_enb.h"
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#include "srsenb/hdr/common/rnti_pool.h"
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#include "srsran/adt/circular_buffer.h"
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#include "srsran/common/buffer_pool.h"
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#include "srsran/common/common.h"
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#include "srsran/common/stack_procedure.h"
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#include "srsran/common/task_scheduler.h"
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#include "srsran/common/timeout.h"
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#include "srsran/interfaces/enb_rrc_interfaces.h"
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#include "srsran/srslog/srslog.h"
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#include <map>
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namespace srsenb {
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class s1ap_interface_rrc;
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class pdcp_interface_rrc;
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class rlc_interface_rrc;
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class mac_interface_rrc;
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class phy_interface_rrc_lte;
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class paging_manager;
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static const char rrc_state_text[RRC_STATE_N_ITEMS][100] = {"IDLE",
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"WAIT FOR CON SETUP COMPLETE",
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"WAIT FOR SECURITY MODE COMPLETE",
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"WAIT FOR UE CAPABILITIY INFORMATION",
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"WAIT FOR CON RECONF COMPLETE",
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"RRC CONNECTED",
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"RELEASE REQUEST"};
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class rrc final : public rrc_interface_pdcp,
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public rrc_interface_mac,
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public rrc_interface_rlc,
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public rrc_interface_s1ap,
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public rrc_eutra_interface_rrc_nr
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{
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public:
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explicit rrc(srsran::task_sched_handle task_sched_);
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~rrc();
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int32_t init(const rrc_cfg_t& cfg_,
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phy_interface_rrc_lte* phy,
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mac_interface_rrc* mac,
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rlc_interface_rrc* rlc,
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pdcp_interface_rrc* pdcp,
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s1ap_interface_rrc* s1ap,
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gtpu_interface_rrc* gtpu);
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int32_t init(const rrc_cfg_t& cfg_,
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phy_interface_rrc_lte* phy,
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mac_interface_rrc* mac,
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rlc_interface_rrc* rlc,
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pdcp_interface_rrc* pdcp,
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s1ap_interface_rrc* s1ap,
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gtpu_interface_rrc* gtpu,
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rrc_nr_interface_rrc* rrc_nr);
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void stop();
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void get_metrics(rrc_metrics_t& m);
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void tti_clock();
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// rrc_interface_mac
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int add_user(uint16_t rnti, const sched_interface::ue_cfg_t& init_ue_cfg) override;
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void upd_user(uint16_t new_rnti, uint16_t old_rnti) override;
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void set_activity_user(uint16_t rnti) override;
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void set_radiolink_dl_state(uint16_t rnti, bool crc_res) override;
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void set_radiolink_ul_state(uint16_t rnti, bool crc_res) override;
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bool is_paging_opportunity(uint32_t tti, uint32_t* payload_len) override;
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uint8_t* read_pdu_bcch_dlsch(const uint8_t cc_idx, const uint32_t sib_index) override;
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// rrc_interface_rlc
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void read_pdu_pcch(uint32_t tti_tx_dl, uint8_t* payload, uint32_t buffer_size) override;
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void max_retx_attempted(uint16_t rnti) override;
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void protocol_failure(uint16_t rnti) override;
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// rrc_interface_s1ap
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void write_dl_info(uint16_t rnti, srsran::unique_byte_buffer_t sdu) override;
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void release_ue(uint16_t rnti) override;
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bool setup_ue_ctxt(uint16_t rnti, const asn1::s1ap::init_context_setup_request_s& msg) override;
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bool modify_ue_ctxt(uint16_t rnti, const asn1::s1ap::ue_context_mod_request_s& msg) override;
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bool has_erab(uint16_t rnti, uint32_t erab_id) const override;
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int get_erab_addr_in(uint16_t rnti, uint16_t erab_id, transp_addr_t& addr_in, uint32_t& teid_in) const override;
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void set_aggregate_max_bitrate(uint16_t rnti, const asn1::s1ap::ue_aggregate_maximum_bitrate_s& bitrate) override;
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int setup_erab(uint16_t rnti,
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uint16_t erab_id,
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const asn1::s1ap::erab_level_qos_params_s& qos_params,
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srsran::const_span<uint8_t> nas_pdu,
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const asn1::bounded_bitstring<1, 160, true, true>& addr,
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uint32_t gtpu_teid_out,
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asn1::s1ap::cause_c& cause) override;
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int modify_erab(uint16_t rnti,
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uint16_t erab_id,
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const asn1::s1ap::erab_level_qos_params_s& qos_params,
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srsran::const_span<uint8_t> nas_pdu,
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asn1::s1ap::cause_c& cause) override;
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bool release_erabs(uint32_t rnti) override;
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int release_erab(uint16_t rnti, uint16_t erab_id) override;
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void add_paging_id(uint32_t ueid, const asn1::s1ap::ue_paging_id_c& ue_paging_id) override;
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void ho_preparation_complete(uint16_t rnti,
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rrc::ho_prep_result result,
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const asn1::s1ap::ho_cmd_s& msg,
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srsran::unique_byte_buffer_t rrc_container) override;
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uint16_t start_ho_ue_resource_alloc(const asn1::s1ap::ho_request_s& msg,
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const asn1::s1ap::sourceenb_to_targetenb_transparent_container_s& container,
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asn1::s1ap::cause_c& failure_cause) override;
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void set_erab_status(uint16_t rnti, const asn1::s1ap::bearers_subject_to_status_transfer_list_l& erabs) override;
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int notify_ue_erab_updates(uint16_t rnti, srsran::const_byte_span nas_pdu) override;
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// rrc_eutra_interface_rrc_nr
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void sgnb_addition_ack(uint16_t rnti,
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const asn1::dyn_octstring& nr_secondary_cell_group_cfg_r15,
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const asn1::dyn_octstring& nr_radio_bearer_cfg1_r15) override;
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void sgnb_addition_reject(uint16_t rnti) override;
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// rrc_interface_pdcp
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void write_pdu(uint16_t rnti, uint32_t lcid, srsran::unique_byte_buffer_t pdu) override;
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void notify_pdcp_integrity_error(uint16_t rnti, uint32_t lcid) override;
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uint32_t get_nof_users();
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// logging
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enum direction_t { Rx = 0, Tx, toS1AP, fromS1AP };
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template <class T>
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void log_rrc_message(const direction_t dir,
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uint16_t rnti,
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uint32_t lcid,
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srsran::const_byte_span pdu,
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const T& msg,
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const char* msg_type)
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{
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log_rxtx_pdu_impl(dir, rnti, lcid, pdu, msg_type);
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if (logger.debug.enabled()) {
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asn1::json_writer json_writer;
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msg.to_json(json_writer);
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logger.debug("Content:\n%s", json_writer.to_string().c_str());
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}
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}
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template <class T>
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void log_broadcast_rrc_message(uint16_t rnti, srsran::const_byte_span pdu, const T& msg, const char* msg_type)
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{
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log_rrc_message(Tx, rnti, -1, pdu, msg, msg_type);
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}
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class ue;
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private:
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// args
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srsran::task_sched_handle task_sched;
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phy_interface_rrc_lte* phy = nullptr;
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mac_interface_rrc* mac = nullptr;
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rlc_interface_rrc* rlc = nullptr;
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pdcp_interface_rrc* pdcp = nullptr;
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gtpu_interface_rrc* gtpu = nullptr;
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s1ap_interface_rrc* s1ap = nullptr;
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rrc_nr_interface_rrc* rrc_nr = nullptr;
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srslog::basic_logger& logger;
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// derived params
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std::unique_ptr<enb_cell_common_list> cell_common_list;
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// state
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std::unique_ptr<freq_res_common_list> cell_res_list;
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std::map<uint16_t, unique_rnti_ptr<ue> > users; // NOTE: has to have fixed addr
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std::unique_ptr<paging_manager> pending_paging;
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void process_release_complete(uint16_t rnti);
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void rem_user(uint16_t rnti);
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uint32_t generate_sibs();
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void configure_mbsfn_sibs();
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int pack_mcch();
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void config_mac();
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void parse_ul_dcch(ue& ue, uint32_t lcid, srsran::unique_byte_buffer_t pdu);
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void parse_ul_ccch(ue& ue, srsran::unique_byte_buffer_t pdu);
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void send_rrc_connection_reject(uint16_t rnti);
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const static int mcch_payload_len = 3000;
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int current_mcch_length = 0;
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uint8_t mcch_payload_buffer[mcch_payload_len] = {};
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struct rrc_pdu {
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uint16_t rnti;
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uint32_t lcid;
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uint32_t arg;
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srsran::unique_byte_buffer_t pdu;
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};
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void log_rx_pdu_fail(uint16_t rnti, uint32_t lcid, srsran::const_byte_span pdu, const char* cause);
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void
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log_rxtx_pdu_impl(direction_t dir, uint16_t rnti, uint32_t lcid, srsran::const_byte_span pdu, const char* msg_type);
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const static uint32_t LCID_EXIT = 0xffff0000;
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const static uint32_t LCID_REM_USER = 0xffff0001;
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const static uint32_t LCID_REL_USER = 0xffff0002;
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const static uint32_t LCID_ACT_USER = 0xffff0004;
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const static uint32_t LCID_RLC_RTX = 0xffff0005;
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const static uint32_t LCID_RADLINK_DL = 0xffff0006;
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const static uint32_t LCID_RADLINK_UL = 0xffff0007;
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const static uint32_t LCID_PROT_FAIL = 0xffff0008;
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bool running = false;
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srsran::dyn_blocking_queue<rrc_pdu> rx_pdu_queue;
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asn1::rrc::mcch_msg_s mcch;
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bool enable_mbms = false;
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rrc_cfg_t cfg = {};
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uint32_t nof_si_messages = 0;
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asn1::rrc::sib_type7_s sib7;
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void rem_user_thread(uint16_t rnti);
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};
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} // namespace srsenb
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#endif // SRSENB_RRC_H
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