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srsLTE
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srsLTE/srsenb/hdr/stack/rrc/rrc.h

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/*
* Copyright 2013-2020 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_bearer_cfg.h"
#include "rrc_cell_cfg.h"
#include "rrc_metrics.h"
#include "srsenb/hdr/stack/upper/common_enb.h"
#include "srslte/common/block_queue.h"
#include "srslte/common/buffer_pool.h"
#include "srslte/common/common.h"
#include "srslte/common/logmap.h"
#include "srslte/common/stack_procedure.h"
#include "srslte/common/timeout.h"
#include "srslte/interfaces/enb_interfaces.h"
#include <map>
#include <queue>
namespace srsenb {
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:
rrc();
~rrc();
void 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,
srslte::timer_handler* timers_);
void stop();
void get_metrics(rrc_metrics_t& m);
void tti_clock();
// rrc_interface_mac
void rl_failure(uint16_t rnti) override;
void 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) 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, srslte::unique_byte_buffer_t sdu) override;
void release_complete(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 release_erabs(uint32_t rnti) 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, srslte::unique_byte_buffer_t rrc_container) override;
// rrc_interface_pdcp
void write_pdu(uint16_t rnti, uint32_t lcid, srslte::unique_byte_buffer_t pdu) override;
uint32_t get_nof_users();
// logging
typedef enum { Rx = 0, Tx } direction_t;
template <class T>
void log_rrc_message(const std::string& source,
const direction_t dir,
const srslte::byte_buffer_t* pdu,
const T& msg,
const std::string& msg_type)
{
if (rrc_log->get_level() == srslte::LOG_LEVEL_INFO) {
rrc_log->info("%s - %s %s (%d B)\n", source.c_str(), dir == Tx ? "Tx" : "Rx", msg_type.c_str(), pdu->N_bytes);
} else if (rrc_log->get_level() >= srslte::LOG_LEVEL_DEBUG) {
asn1::json_writer json_writer;
msg.to_json(json_writer);
rrc_log->debug_hex(pdu->msg,
pdu->N_bytes,
"%s - %s %s (%d B)\n",
source.c_str(),
dir == Tx ? "Tx" : "Rx",
msg_type.c_str(),
pdu->N_bytes);
rrc_log->debug_long("Content:\n%s\n", json_writer.to_string().c_str());
}
}
private:
class ue;
// args
srslte::timer_handler* timers = nullptr;
srslte::byte_buffer_pool* pool = nullptr;
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;
srslte::log_ref rrc_log;
// derived params
std::unique_ptr<cell_info_common_list> cell_common_list;
// state
std::unique_ptr<freq_res_common_list> pucch_res_list;
std::map<uint16_t, std::unique_ptr<ue> > users; // NOTE: has to have fixed addr
std::map<uint32_t, asn1::rrc::paging_record_s> pending_paging;
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);
srslte::byte_buffer_t byte_buf_paging;
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 = false;
static const int RRC_THREAD_PRIO = 65;
srslte::block_queue<rrc_pdu> 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;
class enb_mobility_handler;
std::unique_ptr<enb_mobility_handler> enb_mobility_cfg;
void rem_user_thread(uint16_t rnti);
std::mutex paging_mutex;
};
} // namespace srsenb
#endif // SRSENB_RRC_H
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