/** * * \section COPYRIGHT * * Copyright 2013-2017 Software Radio Systems Limited * * \section LICENSE * * This file is part of srsLTE. * * srsUE 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. * * srsUE 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 RRC_H #define RRC_H #include #include #include "srslte/common/buffer_pool.h" #include "srslte/common/common.h" #include "srslte/common/block_queue.h" #include "srslte/common/threads.h" #include "srslte/common/timeout.h" #include "srslte/common/log.h" #include "srslte/interfaces/enb_interfaces.h" #include "upper/common_enb.h" #include "rrc_metrics.h" namespace srsenb { typedef struct { uint32_t period; LIBLTE_RRC_DSR_TRANS_MAX_ENUM dsr_max; uint32_t nof_prb; uint32_t sf_mapping[80]; uint32_t nof_subframes; } rrc_cfg_sr_t; 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; bool simultaneousAckCQI; rrc_cfg_cqi_mode_t mode; } rrc_cfg_cqi_t; typedef struct { bool configured; LIBLTE_RRC_UL_SPECIFIC_PARAMETERS_STRUCT lc_cfg; LIBLTE_RRC_PDCP_CONFIG_STRUCT pdcp_cfg; LIBLTE_RRC_RLC_CONFIG_STRUCT rlc_cfg; } rrc_cfg_qci_t; #define MAX_NOF_QCI 10 typedef struct { LIBLTE_RRC_SYS_INFO_BLOCK_TYPE_STRUCT sibs[LIBLTE_RRC_MAX_SIB]; LIBLTE_RRC_MAC_MAIN_CONFIG_STRUCT mac_cnfg; LIBLTE_RRC_PUSCH_CONFIG_DEDICATED_STRUCT pusch_cfg; LIBLTE_RRC_ANTENNA_INFO_DEDICATED_STRUCT antenna_info; 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; uint32_t inactivity_timeout_ms; }rrc_cfg_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() : act_monitor(this), cnotifier(NULL) {} void init(rrc_cfg_t *cfg, phy_interface_rrc *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::byte_buffer_t *sdu); void release_complete(uint16_t rnti); bool setup_ue_ctxt(uint16_t rnti, LIBLTE_S1AP_MESSAGE_INITIALCONTEXTSETUPREQUEST_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::byte_buffer_t *pdu); void parse_sibs(); uint32_t get_nof_users(); // 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: ue(); bool is_connected(); bool is_idle(); bool is_timeout(); void set_activity(); rrc_state_t get_state(); void send_connection_setup(bool is_setup = true); void send_connection_reest(); void send_connection_release(); void send_connection_reest_rej(); void send_connection_reconf(srslte::byte_buffer_t *sdu); void send_connection_reconf_new_bearer(LIBLTE_S1AP_E_RABTOBESETUPLISTBEARERSUREQ_STRUCT *e); void send_connection_reconf_upd(srslte::byte_buffer_t *pdu); void send_security_mode_command(); void send_ue_cap_enquiry(); void parse_ul_dcch(uint32_t lcid, srslte::byte_buffer_t* pdu); void handle_rrc_con_req(LIBLTE_RRC_CONNECTION_REQUEST_STRUCT *msg); void handle_rrc_con_reest_req(LIBLTE_RRC_CONNECTION_REESTABLISHMENT_REQUEST_STRUCT *msg); void handle_rrc_con_setup_complete(LIBLTE_RRC_CONNECTION_SETUP_COMPLETE_STRUCT *msg, srslte::byte_buffer_t *pdu); void handle_security_mode_complete(LIBLTE_RRC_SECURITY_MODE_COMPLETE_STRUCT *msg); void handle_security_mode_failure(LIBLTE_RRC_SECURITY_MODE_FAILURE_STRUCT *msg); void handle_ue_cap_info(LIBLTE_RRC_UE_CAPABILITY_INFORMATION_STRUCT *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, uint32_t *I_sr, uint32_t *N_pucch_sr); void sr_get(uint32_t *I_sr, uint32_t *N_pucch_sr); int sr_free(); int cqi_allocate(uint32_t period, uint32_t *pmi_idx, uint32_t *n_pucch); void cqi_get(uint32_t *pmi_idx, uint32_t *n_pucch); int cqi_free(); void send_dl_ccch(LIBLTE_RRC_DL_CCCH_MSG_STRUCT *dl_ccch_msg); void send_dl_dcch(LIBLTE_RRC_DL_DCCH_MSG_STRUCT *dl_dcch_msg, srslte::byte_buffer_t *pdu = NULL); uint16_t rnti; rrc *parent; bool connect_notified; private: struct timeval t_last_activity; // S-TMSI for this UE bool has_tmsi; uint32_t m_tmsi; uint8_t mmec; 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; LIBLTE_RRC_UE_EUTRA_CAPABILITY_STRUCT 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(LIBLTE_RRC_DRB_TO_ADD_MOD_STRUCT *drb, int drbid); }; private: std::map users; std::map pending_paging; activity_monitor act_monitor; LIBLTE_BYTE_MSG_STRUCT sib_buffer[LIBLTE_RRC_MAX_SIB]; // user connect notifier connect_notifier *cnotifier; void rem_user(uint16_t rnti); uint32_t generate_sibs(); void config_mac(); void parse_ul_dcch(uint16_t rnti, uint32_t lcid, srslte::byte_buffer_t *pdu); void parse_ul_ccch(uint16_t rnti, srslte::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); srslte::byte_buffer_pool *pool; srslte::bit_buffer_t bit_buf; srslte::bit_buffer_t bit_buf_paging; srslte::byte_buffer_t erab_info; phy_interface_rrc *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::byte_buffer_t* pdu; }rrc_pdu; const static uint32_t LCID_REM_USER = 0xffff0001; bool running; static const int RRC_THREAD_PRIO = 7; srslte::block_queue rx_pdu_queue; typedef struct { uint32_t nof_users[100][80]; } sr_sched_t; sr_sched_t sr_sched; sr_sched_t cqi_sched; rrc_cfg_t cfg; uint32_t nof_si_messages; LIBLTE_RRC_SYS_INFO_BLOCK_TYPE_2_STRUCT sib2; void run_thread(); void rem_user_thread(uint16_t rnti); pthread_mutex_t user_mutex; pthread_mutex_t paging_mutex; }; } // namespace srsenb #endif // RRC_H