/** * * \section COPYRIGHT * * Copyright 2013-2021 Software Radio Systems Limited * * By using this file, you agree to the terms and conditions set * forth in the LICENSE file which can be found at the top level of * the distribution. * */ #ifndef SRSENB_RRC_H #define SRSENB_RRC_H #include "rrc_bearer_cfg.h" #include "rrc_cell_cfg.h" #include "rrc_metrics.h" #include "srsenb/hdr/common/common_enb.h" #include "srsenb/hdr/common/rnti_pool.h" #include "srsran/adt/circular_buffer.h" #include "srsran/common/buffer_pool.h" #include "srsran/common/common.h" #include "srsran/common/stack_procedure.h" #include "srsran/common/task_scheduler.h" #include "srsran/common/timeout.h" #include "srsran/interfaces/enb_rrc_interfaces.h" #include "srsran/srslog/srslog.h" #include namespace srsenb { class s1ap_interface_rrc; class pdcp_interface_rrc; class rlc_interface_rrc; class mac_interface_rrc; class phy_interface_rrc_lte; static const char rrc_state_text[RRC_STATE_N_ITEMS][100] = {"IDLE", "WAIT FOR CON SETUP COMPLETE", "WAIT FOR SECURITY MODE COMPLETE", "WAIT FOR UE CAPABILITIY INFORMATION", "WAIT FOR CON RECONF COMPLETE", "RRC CONNECTED", "RELEASE REQUEST"}; class rrc final : public rrc_interface_pdcp, public rrc_interface_mac, public rrc_interface_rlc, public rrc_interface_s1ap { public: explicit rrc(srsran::task_sched_handle task_sched_); ~rrc(); int32_t init(const rrc_cfg_t& cfg_, phy_interface_rrc_lte* phy, mac_interface_rrc* mac, rlc_interface_rrc* rlc, pdcp_interface_rrc* pdcp, s1ap_interface_rrc* s1ap, gtpu_interface_rrc* gtpu); void stop(); void get_metrics(rrc_metrics_t& m); void tti_clock(); // rrc_interface_mac int add_user(uint16_t rnti, const sched_interface::ue_cfg_t& init_ue_cfg) override; void upd_user(uint16_t new_rnti, uint16_t old_rnti) override; void set_activity_user(uint16_t rnti, bool ack_info) override; bool is_paging_opportunity(uint32_t tti, uint32_t* payload_len) override; uint8_t* read_pdu_bcch_dlsch(const uint8_t cc_idx, const uint32_t sib_index) override; // rrc_interface_rlc void read_pdu_pcch(uint8_t* payload, uint32_t buffer_size) override; void max_retx_attempted(uint16_t rnti) override; // rrc_interface_s1ap void write_dl_info(uint16_t rnti, srsran::unique_byte_buffer_t sdu) override; void release_ue(uint16_t rnti) override; bool setup_ue_ctxt(uint16_t rnti, const asn1::s1ap::init_context_setup_request_s& msg) override; bool modify_ue_ctxt(uint16_t rnti, const asn1::s1ap::ue_context_mod_request_s& msg) override; bool setup_ue_erabs(uint16_t rnti, const asn1::s1ap::erab_setup_request_s& msg) override; bool has_erab(uint16_t rnti, uint32_t erab_id) const override; void modify_erabs( uint16_t rnti, srsran::const_span erabs_to_modify) override; bool modify_ue_erab(uint16_t rnti, uint8_t erab_id, const asn1::s1ap::erab_level_qos_params_s& qos_params, const asn1::unbounded_octstring* nas_pdu); bool release_erabs(uint32_t rnti) override; void release_erabs(uint32_t rnti, srsran::const_span erabs_to_release, const asn1::unbounded_octstring* nas_pdu) override; void add_paging_id(uint32_t ueid, const asn1::s1ap::ue_paging_id_c& UEPagingID) override; void ho_preparation_complete(uint16_t rnti, bool is_success, const asn1::s1ap::ho_cmd_s& msg, srsran::unique_byte_buffer_t rrc_container) override; uint16_t start_ho_ue_resource_alloc(const asn1::s1ap::ho_request_s& msg, const asn1::s1ap::sourceenb_to_targetenb_transparent_container_s& container, asn1::s1ap::cause_c& failure_cause) override; void set_erab_status(uint16_t rnti, const asn1::s1ap::bearers_subject_to_status_transfer_list_l& erabs) override; // rrc_interface_pdcp void write_pdu(uint16_t rnti, uint32_t lcid, srsran::unique_byte_buffer_t pdu) override; uint32_t get_nof_users(); // logging typedef enum { Rx = 0, Tx, toS1AP, fromS1AP } direction_t; template void log_rrc_message(const std::string& source, const direction_t dir, const srsran::byte_buffer_t* pdu, const T& msg, const std::string& msg_type) { log_rrc_message(source, dir, srsran::make_span(*pdu), msg, msg_type); } template void log_rrc_message(const std::string& source, const direction_t dir, srsran::const_byte_span pdu, const T& msg, const std::string& msg_type) { static const char* dir_str[] = {"Rx", "Tx", "S1AP Tx", "S1AP Rx"}; if (logger.debug.enabled()) { asn1::json_writer json_writer; msg.to_json(json_writer); logger.debug( pdu.data(), pdu.size(), "%s - %s %s (%zd B)", source.c_str(), dir_str[dir], msg_type.c_str(), pdu.size()); logger.debug("Content:\n%s", json_writer.to_string().c_str()); } else if (logger.info.enabled()) { logger.info("%s - %s %s (%zd B)", source.c_str(), dir_str[dir], msg_type.c_str(), pdu.size()); } } private: class ue; // args srsran::task_sched_handle task_sched; phy_interface_rrc_lte* phy = nullptr; mac_interface_rrc* mac = nullptr; rlc_interface_rrc* rlc = nullptr; pdcp_interface_rrc* pdcp = nullptr; gtpu_interface_rrc* gtpu = nullptr; s1ap_interface_rrc* s1ap = nullptr; srslog::basic_logger& logger; // derived params std::unique_ptr cell_common_list; // state std::unique_ptr cell_res_list; std::map > users; // NOTE: has to have fixed addr std::map pending_paging; void process_release_complete(uint16_t rnti); void rem_user(uint16_t rnti); uint32_t generate_sibs(); void configure_mbsfn_sibs(); int pack_mcch(); void config_mac(); void parse_ul_dcch(uint16_t rnti, uint32_t lcid, srsran::unique_byte_buffer_t pdu); void parse_ul_ccch(uint16_t rnti, srsran::unique_byte_buffer_t pdu); void send_rrc_connection_reject(uint16_t rnti); uint32_t paging_tti = INVALID_TTI; srsran::byte_buffer_t byte_buf_paging; const static int mcch_payload_len = 3000; int current_mcch_length = 0; uint8_t mcch_payload_buffer[mcch_payload_len] = {}; typedef struct { uint16_t rnti; uint32_t lcid; srsran::unique_byte_buffer_t pdu; } rrc_pdu; const static uint32_t LCID_EXIT = 0xffff0000; const static uint32_t LCID_REM_USER = 0xffff0001; const static uint32_t LCID_REL_USER = 0xffff0002; const static uint32_t LCID_ACT_USER = 0xffff0004; const static uint32_t LCID_RTX_USER = 0xffff0005; const static uint32_t LCID_MAC_KO_USER = 0xffff0006; bool running = false; srsran::dyn_blocking_queue rx_pdu_queue; asn1::rrc::mcch_msg_s mcch; bool enable_mbms = false; rrc_cfg_t cfg = {}; uint32_t nof_si_messages = 0; asn1::rrc::sib_type7_s sib7; void rem_user_thread(uint16_t rnti); std::mutex paging_mutex; }; } // namespace srsenb #endif // SRSENB_RRC_H