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198 lines
7.7 KiB
C++
198 lines
7.7 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_NR_H
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#define SRSENB_RRC_NR_H
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#include "srsenb/hdr/stack/enb_stack_base.h"
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#include "srsenb/hdr/stack/rrc/rrc_config_common.h"
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#include "srsenb/hdr/stack/rrc/rrc_metrics.h"
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#include "srsgnb/hdr/stack/rrc/rrc_nr_config.h"
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#include "srsran/asn1/rrc_nr.h"
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#include "srsran/common/block_queue.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/task_scheduler.h"
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#include "srsran/common/threads.h"
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#include "srsran/common/timeout.h"
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#include "srsran/interfaces/enb_pdcp_interfaces.h"
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#include "srsran/interfaces/enb_rlc_interfaces.h"
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#include "srsran/interfaces/enb_x2_interfaces.h"
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#include "srsran/interfaces/gnb_interfaces.h"
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#include "srsran/interfaces/gnb_mac_interfaces.h"
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#include "srsran/interfaces/gnb_ngap_interfaces.h"
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#include "srsran/interfaces/gnb_rrc_nr_interfaces.h"
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#include <map>
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#include <queue>
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namespace srsenb {
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class enb_bearer_manager;
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enum class rrc_nr_state_t { RRC_IDLE, RRC_INACTIVE, RRC_CONNECTED };
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class rrc_nr final : public rrc_interface_pdcp_nr,
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public rrc_interface_mac_nr,
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public rrc_interface_rlc_nr,
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public rrc_interface_ngap_nr,
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public rrc_nr_interface_rrc
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{
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public:
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explicit rrc_nr(srsran::task_sched_handle task_sched_);
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~rrc_nr();
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int32_t init(const rrc_nr_cfg_t& cfg,
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phy_interface_stack_nr* phy,
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mac_interface_rrc_nr* mac,
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rlc_interface_rrc* rlc,
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pdcp_interface_rrc* pdcp,
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ngap_interface_rrc_nr* ngap_,
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enb_bearer_manager& bearer_mapper_,
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rrc_eutra_interface_rrc_nr* rrc_eutra_);
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void stop();
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void get_metrics(srsenb::rrc_metrics_t& m);
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void config_phy();
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void config_mac();
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int32_t generate_sibs();
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int read_pdu_bcch_bch(const uint32_t tti, srsran::byte_buffer_t& buffer) final;
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int read_pdu_bcch_dlsch(uint32_t sib_index, srsran::byte_buffer_t& buffer) final;
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/// User manegement
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int add_user(uint16_t rnti, const sched_nr_ue_cfg_t& uecfg) final;
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void rem_user(uint16_t rnti);
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int update_user(uint16_t new_rnti, uint16_t old_rnti) final;
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void set_activity_user(uint16_t rnti) final;
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int rrc_release(uint16_t rnti);
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// RLC interface
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// TODO
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void read_pdu_pcch(uint8_t* payload, uint32_t payload_size) final {}
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void max_retx_attempted(uint16_t rnti) final {}
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void protocol_failure(uint16_t rnti) final {}
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const char* get_rb_name(uint32_t lcid) final { return "invalid"; }
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// PDCP interface
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void write_pdu(uint16_t rnti, uint32_t lcid, srsran::unique_byte_buffer_t pdu) final;
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void notify_pdcp_integrity_error(uint16_t rnti, uint32_t lcid) final;
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// Interface for EUTRA RRC
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void sgnb_addition_request(uint16_t rnti, const sgnb_addition_req_params_t& params) final;
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void sgnb_reconfiguration_complete(uint16_t rnti, const asn1::dyn_octstring& reconfig_response) final;
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void sgnb_release_request(uint16_t nr_rnti) final;
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// Interfaces for NGAP
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int ue_set_security_cfg_key(uint16_t rnti, const asn1::fixed_bitstring<256, false, true>& key) final;
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int ue_set_bitrates(uint16_t rnti, const asn1::ngap::ue_aggregate_maximum_bit_rate_s& rates) final;
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int ue_set_security_cfg_capabilities(uint16_t rnti, const asn1::ngap::ue_security_cap_s& caps) final;
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int start_security_mode_procedure(uint16_t rnti, srsran::unique_byte_buffer_t nas_pdu) final;
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int establish_rrc_bearer(uint16_t rnti,
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uint16_t pdu_session_id,
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srsran::const_byte_span nas_pdu,
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uint32_t lcid) final;
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int release_bearers(uint16_t rnti) final;
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void release_user(uint16_t rnti) final;
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void write_dl_info(uint16_t rnti, srsran::unique_byte_buffer_t sdu) final;
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int set_aggregate_max_bitrate(uint16_t rnti, const asn1::ngap::ue_aggregate_maximum_bit_rate_s& rates) final;
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int allocate_lcid(uint16_t rnti) final;
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// logging
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typedef enum { Rx = 0, Tx } direction_t;
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template <class T>
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void log_rrc_message(const char* 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 char* msg_type);
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class ue;
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private:
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static constexpr uint32_t UE_PSCELL_CC_IDX = 0; // first NR cell is always Primary Secondary Cell for UE
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rrc_nr_cfg_t cfg = {};
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// interfaces
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phy_interface_stack_nr* phy = nullptr;
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mac_interface_rrc_nr* mac = nullptr;
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rlc_interface_rrc* rlc = nullptr;
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pdcp_interface_rrc* pdcp = nullptr;
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ngap_interface_rrc_nr* ngap = nullptr;
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rrc_eutra_interface_rrc_nr* rrc_eutra = nullptr;
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enb_bearer_manager* bearer_mapper = nullptr;
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// args
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srsran::task_sched_handle task_sched;
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// derived
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uint32_t slot_dur_ms = 0;
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srslog::basic_logger& logger;
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asn1::rrc_nr::sp_cell_cfg_s base_sp_cell_cfg;
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// vars
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struct cell_ctxt_t {
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asn1::rrc_nr::mib_s mib;
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asn1::rrc_nr::sib1_s sib1;
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asn1::rrc_nr::sys_info_ies_s::sib_type_and_info_l_ sibs;
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srsran::unique_byte_buffer_t mib_buffer = nullptr;
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std::vector<srsran::unique_byte_buffer_t> sib_buffer;
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std::unique_ptr<const asn1::rrc_nr::cell_group_cfg_s> master_cell_group;
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};
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std::unique_ptr<cell_ctxt_t> cell_ctxt;
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rnti_map_t<std::unique_ptr<ue> > users;
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bool running = false;
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/// Private Methods
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void handle_pdu(uint16_t rnti, uint32_t lcid, srsran::const_byte_span pdu);
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void handle_ul_ccch(uint16_t rnti, srsran::const_byte_span pdu);
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void handle_ul_dcch(uint16_t rnti, uint32_t lcid, srsran::const_byte_span pdu);
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// TS 38.331, 5.3.3 - RRC connection establishment
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void handle_rrc_setup_request(uint16_t rnti, const asn1::rrc_nr::rrc_setup_request_s& msg);
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// TS 38.331, 5.3.7 RRC connection reestablishment
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void handle_rrc_reest_request(uint16_t rnti, const asn1::rrc_nr::rrc_reest_request_s& msg);
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/// This gets called by rrc_nr::sgnb_addition_request and WILL NOT TRIGGER the RX MSG3 activity timer
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int add_user(uint16_t rnti, const sched_nr_ue_cfg_t& uecfg, bool start_msg3_timer);
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// Helper to create PDU from RRC message
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template <class T>
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srsran::unique_byte_buffer_t pack_into_pdu(const T& msg, const char* context_name = nullptr)
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{
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context_name = context_name == nullptr ? __FUNCTION__ : context_name;
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// Allocate a new PDU buffer and pack the
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srsran::unique_byte_buffer_t pdu = srsran::make_byte_buffer();
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if (pdu == nullptr) {
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logger.error("Couldn't allocate PDU in %s.", context_name);
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return nullptr;
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}
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asn1::bit_ref bref(pdu->msg, pdu->get_tailroom());
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if (msg.pack(bref) == asn1::SRSASN_ERROR_ENCODE_FAIL) {
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logger.error("Failed to pack message in %s. Discarding it.", context_name);
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return nullptr;
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}
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pdu->N_bytes = bref.distance_bytes();
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return pdu;
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}
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void log_rx_pdu_fail(uint16_t rnti,
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uint32_t lcid,
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srsran::const_byte_span pdu,
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const char* cause_str,
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bool log_hex = true);
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};
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} // namespace srsenb
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#endif // SRSENB_RRC_NR_H
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