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209 lines
8.4 KiB
C++
209 lines
8.4 KiB
C++
/**
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*
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* \section COPYRIGHT
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*
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* Copyright 2013-2021 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 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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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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{
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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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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, bool ack_info) 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(uint8_t* payload, uint32_t buffer_size) override;
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void max_retx_attempted(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 setup_ue_erabs(uint16_t rnti, const asn1::s1ap::erab_setup_request_s& msg) override;
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bool has_erab(uint16_t rnti, uint32_t erab_id) const override;
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void modify_erabs(
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uint16_t rnti,
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srsran::const_span<const asn1::s1ap::erab_to_be_modified_item_bearer_mod_req_s*> erabs_to_modify) override;
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bool modify_ue_erab(uint16_t rnti,
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uint8_t erab_id,
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const asn1::s1ap::erab_level_qos_params_s& qos_params,
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const asn1::unbounded_octstring<true>* nas_pdu);
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bool release_erabs(uint32_t rnti) override;
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void release_erabs(uint32_t rnti,
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srsran::const_span<uint16_t> erabs_to_release,
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const asn1::unbounded_octstring<true>* nas_pdu) override;
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void add_paging_id(uint32_t ueid, const asn1::s1ap::ue_paging_id_c& UEPagingID) override;
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void ho_preparation_complete(uint16_t rnti,
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bool is_success,
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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
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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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// 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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uint32_t get_nof_users();
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// logging
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typedef enum { Rx = 0, Tx, toS1AP, fromS1AP } direction_t;
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template <class T>
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void log_rrc_message(const std::string& source,
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const direction_t dir,
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const srsran::byte_buffer_t* pdu,
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const T& msg,
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const std::string& msg_type)
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{
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log_rrc_message(source, dir, srsran::make_span(*pdu), msg, msg_type);
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}
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template <class T>
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void log_rrc_message(const std::string& source,
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const direction_t dir,
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srsran::const_byte_span pdu,
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const T& msg,
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const std::string& msg_type)
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{
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static const char* dir_str[] = {"Rx", "Tx", "S1AP Tx", "S1AP Rx"};
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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(
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pdu.data(), pdu.size(), "%s - %s %s (%zd B)", source.c_str(), dir_str[dir], msg_type.c_str(), pdu.size());
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logger.debug("Content:\n%s", json_writer.to_string().c_str());
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} else if (logger.info.enabled()) {
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logger.info("%s - %s %s (%zd B)", source.c_str(), dir_str[dir], msg_type.c_str(), pdu.size());
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}
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}
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private:
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class ue;
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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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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::map<uint32_t, asn1::rrc::paging_record_s> 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(uint16_t rnti, uint32_t lcid, srsran::unique_byte_buffer_t pdu);
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void parse_ul_ccch(uint16_t rnti, srsran::unique_byte_buffer_t pdu);
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void send_rrc_connection_reject(uint16_t rnti);
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uint32_t paging_tti = INVALID_TTI;
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srsran::byte_buffer_t byte_buf_paging;
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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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typedef struct {
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uint16_t rnti;
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uint32_t lcid;
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srsran::unique_byte_buffer_t pdu;
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} rrc_pdu;
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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_RTX_USER = 0xffff0005;
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const static uint32_t LCID_MAC_KO_USER = 0xffff0006;
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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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std::mutex paging_mutex;
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};
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} // namespace srsenb
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#endif // SRSENB_RRC_H
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