/* * Copyright 2013-2019 Software Radio Systems Limited * * This file is part of srsLTE. * * srsLTE is free software: you can redistribute it and/or modify * it under the terms of the GNU Affero General Public License as * published by the Free Software Foundation, either version 3 of * the License, or (at your option) any later version. * * srsLTE is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU Affero General Public License for more details. * * A copy of the GNU Affero General Public License can be found in * the LICENSE file in the top-level directory of this distribution * and at http://www.gnu.org/licenses/. * */ #ifndef SRSENB_RRC_H #define SRSENB_RRC_H #include "rrc_metrics.h" #include "srsenb/hdr/stack/upper/common_enb.h" #include "srslte/asn1/rrc_asn1.h" #include "srslte/common/block_queue.h" #include "srslte/common/buffer_pool.h" #include "srslte/common/common.h" #include "srslte/common/log.h" #include "srslte/common/stack_procedure.h" #include "srslte/common/threads.h" #include "srslte/common/timeout.h" #include "srslte/interfaces/enb_interfaces.h" #include #include namespace srsenb { struct rrc_cfg_sr_t { uint32_t period; asn1::rrc::sched_request_cfg_c::setup_s_::dsr_trans_max_e_ dsr_max; uint32_t nof_prb; uint32_t sf_mapping[80]; uint32_t nof_subframes; }; typedef enum { RRC_CFG_CQI_MODE_PERIODIC = 0, RRC_CFG_CQI_MODE_APERIODIC, RRC_CFG_CQI_MODE_N_ITEMS } rrc_cfg_cqi_mode_t; static const char rrc_cfg_cqi_mode_text[RRC_CFG_CQI_MODE_N_ITEMS][20] = {"periodic", "aperiodic"}; typedef struct { uint32_t sf_mapping[80]; uint32_t nof_subframes; uint32_t nof_prb; uint32_t period; uint32_t m_ri; bool simultaneousAckCQI; rrc_cfg_cqi_mode_t mode; } rrc_cfg_cqi_t; typedef struct { bool configured; asn1::rrc::lc_ch_cfg_s::ul_specific_params_s_ lc_cfg; asn1::rrc::pdcp_cfg_s pdcp_cfg; asn1::rrc::rlc_cfg_c rlc_cfg; } rrc_cfg_qci_t; // structure used to parse the cfg file. struct meas_cell_cfg_t { uint32_t earfcn; uint16_t pci; uint32_t cell_id; float q_offset; }; // neigh measurement Cell info struct rrc_meas_cfg_t { std::vector meas_cells; std::vector meas_reports; asn1::rrc::quant_cfg_eutra_s quant_cfg; // uint32_t nof_meas_ids; // srslte::rrc_meas_id_t meas_ids[LIBLTE_RRC_MAX_MEAS_ID]; // FIXME: Add blacklist cells // FIXME: Add multiple meas configs }; #define MAX_NOF_QCI 10 struct rrc_cfg_t { asn1::rrc::sib_type1_s sib1; asn1::rrc::sib_info_item_c sibs[ASN1_RRC_MAX_SIB]; asn1::rrc::mac_main_cfg_s mac_cnfg; asn1::rrc::pusch_cfg_ded_s pusch_cfg; asn1::rrc::ant_info_ded_s antenna_info; asn1::rrc::pdsch_cfg_ded_s::p_a_e_ pdsch_cfg; rrc_cfg_sr_t sr_cfg; rrc_cfg_cqi_t cqi_cfg; rrc_cfg_qci_t qci_cfg[MAX_NOF_QCI]; srslte_cell_t cell; bool enable_mbsfn; uint32_t inactivity_timeout_ms; srslte::CIPHERING_ALGORITHM_ID_ENUM eea_preference_list[srslte::CIPHERING_ALGORITHM_ID_N_ITEMS]; srslte::INTEGRITY_ALGORITHM_ID_ENUM eia_preference_list[srslte::INTEGRITY_ALGORITHM_ID_N_ITEMS]; bool meas_cfg_present = false; rrc_meas_cfg_t meas_cfg; uint32_t pci; // TODO: add this to srslte_cell_t? uint32_t dl_earfcn; // TODO: add this to srslte_cell_t? }; 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 : public rrc_interface_pdcp, public rrc_interface_mac, public rrc_interface_rlc, public rrc_interface_s1ap, public thread { public: rrc(); ~rrc(); void init(rrc_cfg_t* cfg, phy_interface_stack_lte* phy, mac_interface_rrc* mac, rlc_interface_rrc* rlc, pdcp_interface_rrc* pdcp, s1ap_interface_rrc* s1ap, gtpu_interface_rrc* gtpu, srslte::log* log_rrc); void stop(); void get_metrics(rrc_metrics_t &m); // rrc_interface_mac void rl_failure(uint16_t rnti); void add_user(uint16_t rnti); void upd_user(uint16_t new_rnti, uint16_t old_rnti); void set_activity_user(uint16_t rnti); bool is_paging_opportunity(uint32_t tti, uint32_t *payload_len); // rrc_interface_rlc void read_pdu_bcch_dlsch(uint32_t sib_idx, uint8_t *payload); void read_pdu_pcch(uint8_t *payload, uint32_t buffer_size); void max_retx_attempted(uint16_t rnti); // rrc_interface_s1ap void write_dl_info(uint16_t rnti, srslte::unique_byte_buffer_t sdu); void release_complete(uint16_t rnti); bool setup_ue_ctxt(uint16_t rnti, LIBLTE_S1AP_MESSAGE_INITIALCONTEXTSETUPREQUEST_STRUCT* msg); bool modify_ue_ctxt(uint16_t rnti, LIBLTE_S1AP_MESSAGE_UECONTEXTMODIFICATIONREQUEST_STRUCT* msg); bool setup_ue_erabs(uint16_t rnti, LIBLTE_S1AP_MESSAGE_E_RABSETUPREQUEST_STRUCT* msg); bool release_erabs(uint32_t rnti); void add_paging_id(uint32_t ueid, LIBLTE_S1AP_UEPAGINGID_STRUCT UEPagingID); // rrc_interface_pdcp void write_pdu(uint16_t rnti, uint32_t lcid, srslte::unique_byte_buffer_t pdu); void parse_sibs(); uint32_t get_nof_users(); // logging typedef enum { Rx = 0, Tx } direction_t; template void log_rrc_message(const std::string& source, direction_t dir, const srslte::byte_buffer_t* pdu, const T& msg); // Notifier for user connect class connect_notifier { public: virtual void user_connected(uint16_t rnti) = 0; }; void set_connect_notifer(connect_notifier *cnotifier); class activity_monitor : public thread { public: activity_monitor(rrc* parent_); void stop(); private: rrc* parent; bool running; void run_thread(); }; class ue { public: class rrc_mobility; ue(rrc* outer_rrc, uint16_t rnti); bool is_connected(); bool is_idle(); bool is_timeout(); void set_activity(); uint32_t rl_failure(); rrc_state_t get_state(); void send_connection_setup(bool is_setup = true); void send_connection_reest(); void send_connection_reject(); void send_connection_release(); void send_connection_reest_rej(); void send_connection_reconf(srslte::unique_byte_buffer_t sdu); void send_connection_reconf_new_bearer(LIBLTE_S1AP_E_RABTOBESETUPLISTBEARERSUREQ_STRUCT *e); void send_connection_reconf_upd(srslte::unique_byte_buffer_t pdu); void send_security_mode_command(); void send_ue_cap_enquiry(); void parse_ul_dcch(uint32_t lcid, srslte::unique_byte_buffer_t pdu); void handle_rrc_con_req(asn1::rrc::rrc_conn_request_s* msg); void handle_rrc_con_reest_req(asn1::rrc::rrc_conn_reest_request_r8_ies_s* msg); void handle_rrc_con_setup_complete(asn1::rrc::rrc_conn_setup_complete_s* msg, srslte::unique_byte_buffer_t pdu); void handle_rrc_reconf_complete(asn1::rrc::rrc_conn_recfg_complete_s* msg, srslte::unique_byte_buffer_t pdu); void handle_security_mode_complete(asn1::rrc::security_mode_complete_s* msg); void handle_security_mode_failure(asn1::rrc::security_mode_fail_s* msg); bool handle_ue_cap_info(asn1::rrc::ue_cap_info_s* msg); void set_bitrates(LIBLTE_S1AP_UEAGGREGATEMAXIMUMBITRATE_STRUCT *rates); void set_security_capabilities(LIBLTE_S1AP_UESECURITYCAPABILITIES_STRUCT *caps); void set_security_key(uint8_t* key, uint32_t length); bool setup_erabs(LIBLTE_S1AP_E_RABTOBESETUPLISTCTXTSUREQ_STRUCT* e); bool setup_erabs(LIBLTE_S1AP_E_RABTOBESETUPLISTBEARERSUREQ_STRUCT* e); void setup_erab(uint8_t id, LIBLTE_S1AP_E_RABLEVELQOSPARAMETERS_STRUCT* qos, LIBLTE_S1AP_TRANSPORTLAYERADDRESS_STRUCT* addr, uint32_t teid_out, LIBLTE_S1AP_NAS_PDU_STRUCT* nas_pdu); bool release_erabs(); void notify_s1ap_ue_ctxt_setup_complete(); void notify_s1ap_ue_erab_setup_response(LIBLTE_S1AP_E_RABTOBESETUPLISTBEARERSUREQ_STRUCT* e); int sr_allocate(uint32_t period, uint8_t* I_sr, uint16_t* N_pucch_sr); void sr_get(uint8_t* I_sr, uint16_t* N_pucch_sr); int sr_free(); int cqi_allocate(uint32_t period, uint16_t* pmi_idx, uint16_t* n_pucch); void cqi_get(uint16_t* pmi_idx, uint16_t* n_pucch); int cqi_free(); int ri_get(uint32_t m_ri, uint16_t* ri_idx); bool select_security_algorithms(); void send_dl_ccch(asn1::rrc::dl_ccch_msg_s* dl_ccch_msg); void send_dl_dcch(asn1::rrc::dl_dcch_msg_s* dl_dcch_msg, srslte::unique_byte_buffer_t pdu = srslte::unique_byte_buffer_t()); uint16_t rnti; rrc* parent; bool connect_notified; bool is_csfb; private: srslte::byte_buffer_pool* pool; struct timeval t_last_activity; struct timeval t_ue_init; asn1::rrc::establishment_cause_e establishment_cause; std::unique_ptr mobility_handler; // S-TMSI for this UE bool has_tmsi; uint32_t m_tmsi; uint8_t mmec; uint32_t rlf_cnt; uint8_t transaction_id; rrc_state_t state; std::map srbs; std::map drbs; uint8_t k_enb[32]; // Provided by MME uint8_t k_rrc_enc[32]; uint8_t k_rrc_int[32]; uint8_t k_up_enc[32]; uint8_t k_up_int[32]; // Not used: only for relay nodes (3GPP 33.401 Annex A.7) srslte::CIPHERING_ALGORITHM_ID_ENUM cipher_algo; srslte::INTEGRITY_ALGORITHM_ID_ENUM integ_algo; LIBLTE_S1AP_UEAGGREGATEMAXIMUMBITRATE_STRUCT bitrates; LIBLTE_S1AP_UESECURITYCAPABILITIES_STRUCT security_capabilities; asn1::rrc::ue_eutra_cap_s eutra_capabilities; typedef struct { uint8_t id; LIBLTE_S1AP_E_RABLEVELQOSPARAMETERS_STRUCT qos_params; LIBLTE_S1AP_TRANSPORTLAYERADDRESS_STRUCT address; uint32_t teid_out; uint32_t teid_in; }erab_t; std::map erabs; int sr_sched_sf_idx; int sr_sched_prb_idx; bool sr_allocated; uint32_t sr_N_pucch; uint32_t sr_I; uint32_t cqi_pucch; uint32_t cqi_idx; bool cqi_allocated; int cqi_sched_sf_idx; int cqi_sched_prb_idx; int get_drbid_config(asn1::rrc::drb_to_add_mod_s* drb, int drbid); bool nas_pending; srslte::byte_buffer_t erab_info; }; private: std::map users; std::map pending_paging; activity_monitor act_monitor; std::vector sib_buffer; // user connect notifier connect_notifier *cnotifier; void process_release_complete(uint16_t rnti); void process_rl_failure(uint16_t rnti); void rem_user(uint16_t rnti); uint32_t generate_sibs(); void configure_mbsfn_sibs(asn1::rrc::sib_type2_s* sib2, asn1::rrc::sib_type13_r9_s* sib13); void config_mac(); void parse_ul_dcch(uint16_t rnti, uint32_t lcid, srslte::unique_byte_buffer_t pdu); void parse_ul_ccch(uint16_t rnti, srslte::unique_byte_buffer_t pdu); void configure_security(uint16_t rnti, uint32_t lcid, uint8_t *k_rrc_enc, uint8_t *k_rrc_int, uint8_t *k_up_enc, uint8_t *k_up_int, srslte::CIPHERING_ALGORITHM_ID_ENUM cipher_algo, srslte::INTEGRITY_ALGORITHM_ID_ENUM integ_algo); void enable_integrity(uint16_t rnti, uint32_t lcid); void enable_encryption(uint16_t rnti, uint32_t lcid); srslte::byte_buffer_pool* pool; srslte::byte_buffer_t byte_buf_paging; phy_interface_stack_lte* phy; mac_interface_rrc* mac; rlc_interface_rrc* rlc; pdcp_interface_rrc* pdcp; gtpu_interface_rrc* gtpu; s1ap_interface_rrc* s1ap; srslte::log* rrc_log; typedef struct{ uint16_t rnti; uint32_t lcid; srslte::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_RLF_USER = 0xffff0003; const static uint32_t LCID_ACT_USER = 0xffff0004; bool running; static const int RRC_THREAD_PRIO = 65; srslte::block_queue rx_pdu_queue; struct sr_sched_t { uint32_t nof_users[100][80]; }; sr_sched_t sr_sched; sr_sched_t cqi_sched; asn1::rrc::mcch_msg_s mcch; bool enable_mbms; rrc_cfg_t cfg; uint32_t nof_si_messages; asn1::rrc::sib_type2_s sib2; asn1::rrc::sib_type7_s sib7; class mobility_cfg; std::unique_ptr enb_mobility_cfg; void run_thread(); void rem_user_thread(uint16_t rnti); pthread_mutex_t user_mutex; pthread_mutex_t paging_mutex; }; } // namespace srsenb #endif // SRSENB_RRC_H