mirror of https://github.com/PentHertz/srsLTE.git
396 lines
11 KiB
C++
396 lines
11 KiB
C++
/**
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* Copyright 2013-2022 Software Radio Systems Limited
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*
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* This file is part of srsRAN.
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*
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* srsRAN is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as
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* published by the Free Software Foundation, either version 3 of
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* the License, or (at your option) any later version.
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*
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* srsRAN is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* A copy of the GNU Affero General Public License can be found in
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* the LICENSE file in the top-level directory of this distribution
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* and at http://www.gnu.org/licenses/.
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*
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*/
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#include "srsran/upper/pdcp.h"
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#include "srsran/upper/pdcp_entity_nr.h"
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namespace srsran {
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pdcp::pdcp(srsran::task_sched_handle task_sched_, const char* logname) :
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task_sched(task_sched_), logger(srslog::fetch_basic_logger(logname))
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{}
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pdcp::~pdcp()
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{
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{
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std::lock_guard<std::mutex> lock(cache_mutex);
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valid_lcids_cached.clear();
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}
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// destroy all remaining entities
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pdcp_array.clear();
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pdcp_array_mrb.clear();
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}
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void pdcp::init(srsue::rlc_interface_pdcp* rlc_, srsue::rrc_interface_pdcp* rrc_, srsue::gw_interface_pdcp* gw_)
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{
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rlc = rlc_;
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rrc = rrc_;
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gw = gw_;
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}
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void pdcp::stop() {}
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void pdcp::reestablish()
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{
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for (auto& lcid_it : pdcp_array) {
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lcid_it.second->reestablish();
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}
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}
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void pdcp::reestablish(uint32_t lcid)
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{
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if (valid_lcid(lcid)) {
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pdcp_array.at(lcid)->reestablish();
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}
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}
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void pdcp::reset()
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{
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{
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std::lock_guard<std::mutex> lock(cache_mutex);
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valid_lcids_cached.clear();
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}
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// destroy all bearers
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pdcp_array.clear();
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}
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void pdcp::set_enabled(uint32_t lcid, bool enabled)
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{
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if (valid_lcid(lcid)) {
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pdcp_array.at(lcid)->set_enabled(enabled);
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} else {
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logger.warning("LCID %d doesn't exist while setting enabled", lcid);
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}
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}
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/*******************************************************************************
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RRC/GW interface
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*******************************************************************************/
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// NOTE: Called from separate thread
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bool pdcp::is_lcid_enabled(uint32_t lcid)
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{
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std::lock_guard<std::mutex> lock(cache_mutex);
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return valid_lcids_cached.count(lcid) > 0;
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}
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void pdcp::write_sdu(uint32_t lcid, unique_byte_buffer_t sdu, int sn)
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{
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if (valid_lcid(lcid)) {
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pdcp_array.at(lcid)->write_sdu(std::move(sdu), sn);
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} else {
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logger.warning("LCID %d doesn't exist. Deallocating SDU", lcid);
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}
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}
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void pdcp::write_sdu_mch(uint32_t lcid, unique_byte_buffer_t sdu)
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{
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if (valid_mch_lcid(lcid)) {
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pdcp_array_mrb.at(lcid)->write_sdu(std::move(sdu));
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}
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}
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int pdcp::add_bearer(uint32_t lcid, const pdcp_config_t& cfg)
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{
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if (valid_lcid(lcid)) {
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return pdcp_array[lcid]->configure(cfg) ? SRSRAN_SUCCESS : SRSRAN_ERROR;
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}
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std::unique_ptr<pdcp_entity_base> entity;
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// For now we create an pdcp entity lte for nr due to it's maturity
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if (cfg.rat == srsran::srsran_rat_t::lte) {
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entity.reset(new pdcp_entity_lte{rlc, rrc, gw, task_sched, logger, lcid});
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} else if (cfg.rat == srsran::srsran_rat_t::nr) {
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entity.reset(new pdcp_entity_nr{rlc, rrc, gw, task_sched, logger, lcid});
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}
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if (not entity->configure(cfg)) {
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logger.error("Can not configure PDCP entity");
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return SRSRAN_ERROR;
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}
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if (not pdcp_array.insert(std::make_pair(lcid, std::move(entity))).second) {
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logger.error("Error inserting PDCP entity in to array.");
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return SRSRAN_ERROR;
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}
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{
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std::lock_guard<std::mutex> lock(cache_mutex);
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valid_lcids_cached.insert(lcid);
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}
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logger.info("Add %s%d (lcid=%d, sn_len=%dbits)",
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cfg.rb_type == PDCP_RB_IS_DRB ? "DRB" : "SRB",
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cfg.bearer_id,
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lcid,
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cfg.sn_len);
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return SRSRAN_SUCCESS;
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}
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void pdcp::add_bearer_mrb(uint32_t lcid, const pdcp_config_t& cfg)
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{
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if (not valid_mch_lcid(lcid)) {
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std::unique_ptr<pdcp_entity_lte> entity;
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entity.reset(new pdcp_entity_lte{rlc, rrc, gw, task_sched, logger, lcid});
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if (not entity->configure(cfg)) {
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logger.error("Can not configure PDCP entity");
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return;
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}
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if (not pdcp_array_mrb.insert(std::make_pair(lcid, std::move(entity))).second) {
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logger.error("Error inserting PDCP entity in to array.");
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return;
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}
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logger.info(
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"Add %s (lcid=%d, bearer_id=%d, sn_len=%dbits)", rrc->get_rb_name(lcid), lcid, cfg.bearer_id, cfg.sn_len);
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} else {
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logger.warning("Bearer %s already configured. Reconfiguration not supported", rrc->get_rb_name(lcid));
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}
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}
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void pdcp::del_bearer(uint32_t lcid)
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{
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{
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std::lock_guard<std::mutex> lock(cache_mutex);
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valid_lcids_cached.erase(lcid);
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}
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if (valid_lcid(lcid)) {
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logger.info("Deleted PDCP bearer %s", pdcp_array[lcid]->get_rb_name());
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pdcp_array.erase(lcid);
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} else {
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logger.warning("Can't delete bearer with LCID=%s. Cause: bearer doesn't exist.", lcid);
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}
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}
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void pdcp::change_lcid(uint32_t old_lcid, uint32_t new_lcid)
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{
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// make sure old LCID exists and new LCID is still free
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if (valid_lcid(old_lcid) && not valid_lcid(new_lcid)) {
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// insert old PDCP entity into new LCID
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std::lock_guard<std::mutex> lock(cache_mutex);
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auto it = pdcp_array.find(old_lcid);
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std::unique_ptr<pdcp_entity_base> pdcp_entity = std::move(it->second);
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if (not pdcp_array.insert(std::make_pair(new_lcid, std::move(pdcp_entity))).second) {
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logger.error("Error inserting PDCP entity into array.");
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return;
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}
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// erase from old position
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pdcp_array.erase(it);
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valid_lcids_cached.erase(old_lcid);
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valid_lcids_cached.insert(new_lcid);
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logger.warning("Changed LCID of PDCP bearer from %d to %d", old_lcid, new_lcid);
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} else {
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logger.error("Can't change PDCP of bearer %s from %d to %d. Bearer doesn't exist or new LCID already occupied.",
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rrc->get_rb_name(old_lcid),
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old_lcid,
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new_lcid);
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}
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}
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void pdcp::config_security(uint32_t lcid, const as_security_config_t& sec_cfg)
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{
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if (valid_lcid(lcid)) {
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pdcp_array.at(lcid)->config_security(sec_cfg);
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}
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}
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void pdcp::config_security_all(const as_security_config_t& sec_cfg)
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{
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for (auto& it : pdcp_array) {
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it.second->config_security(sec_cfg);
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}
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}
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void pdcp::enable_integrity(uint32_t lcid, srsran_direction_t direction)
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{
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if (valid_lcid(lcid)) {
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pdcp_array.at(lcid)->enable_integrity(direction);
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}
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}
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void pdcp::enable_encryption(uint32_t lcid, srsran_direction_t direction)
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{
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if (valid_lcid(lcid)) {
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pdcp_array.at(lcid)->enable_encryption(direction);
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}
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}
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void pdcp::enable_security_timed(uint32_t lcid, srsran_direction_t direction, uint32_t sn)
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{
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if (valid_lcid(lcid)) {
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pdcp_array.at(lcid)->enable_security_timed(direction, sn);
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}
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}
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void pdcp::send_status_report()
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{
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for (auto& lcid_it : pdcp_array) {
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lcid_it.second->send_status_report();
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}
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}
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void pdcp::send_status_report(uint32_t lcid)
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{
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if (valid_lcid(lcid)) {
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pdcp_array.at(lcid)->send_status_report();
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}
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}
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bool pdcp::get_bearer_state(uint32_t lcid, srsran::pdcp_lte_state_t* state)
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{
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if (not valid_lcid(lcid)) {
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return false;
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}
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pdcp_array[lcid]->get_bearer_state(state);
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return true;
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}
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bool pdcp::set_bearer_state(uint32_t lcid, const srsran::pdcp_lte_state_t& state)
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{
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if (not valid_lcid(lcid)) {
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return false;
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}
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pdcp_array[lcid]->set_bearer_state(state, true);
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return true;
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}
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std::map<uint32_t, srsran::unique_byte_buffer_t> pdcp::get_buffered_pdus(uint32_t lcid)
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{
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if (not valid_lcid(lcid)) {
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return {};
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}
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return pdcp_array[lcid]->get_buffered_pdus();
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}
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/*******************************************************************************
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RLC interface
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*******************************************************************************/
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void pdcp::write_pdu(uint32_t lcid, unique_byte_buffer_t pdu)
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{
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if (valid_lcid(lcid)) {
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pdcp_array.at(lcid)->write_pdu(std::move(pdu));
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} else {
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logger.warning("Dropping PDU, lcid=%d doesnt exists", lcid);
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}
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}
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void pdcp::write_pdu_bcch_bch(unique_byte_buffer_t sdu)
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{
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rrc->write_pdu_bcch_bch(std::move(sdu));
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}
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void pdcp::write_pdu_bcch_dlsch(unique_byte_buffer_t sdu)
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{
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rrc->write_pdu_bcch_dlsch(std::move(sdu));
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}
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void pdcp::write_pdu_pcch(unique_byte_buffer_t sdu)
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{
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rrc->write_pdu_pcch(std::move(sdu));
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}
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void pdcp::write_pdu_mch(uint32_t lcid, unique_byte_buffer_t sdu)
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{
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if (0 == lcid) {
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rrc->write_pdu_mch(lcid, std::move(sdu));
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} else {
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gw->write_pdu_mch(lcid, std::move(sdu));
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}
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}
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void pdcp::notify_delivery(uint32_t lcid, const pdcp_sn_vector_t& pdcp_sns)
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{
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if (valid_lcid(lcid)) {
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pdcp_array.at(lcid)->notify_delivery(pdcp_sns);
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} else {
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logger.warning("Could not notify delivery: lcid=%d, nof_sn=%ld.", lcid, pdcp_sns.size());
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}
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}
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void pdcp::notify_failure(uint32_t lcid, const srsran::pdcp_sn_vector_t& pdcp_sns)
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{
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if (valid_lcid(lcid)) {
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pdcp_array.at(lcid)->notify_failure(pdcp_sns);
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} else {
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logger.warning("Could not notify failure: lcid=%d, nof_sn=%ld.", lcid, pdcp_sns.size());
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}
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}
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bool pdcp::valid_lcid(uint32_t lcid)
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{
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if (lcid >= SRSRAN_N_RADIO_BEARERS) {
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logger.error("Radio bearer id must be in [0:%d] - %d", SRSRAN_N_RADIO_BEARERS, lcid);
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return false;
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}
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return pdcp_array.find(lcid) != pdcp_array.end();
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}
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bool pdcp::valid_mch_lcid(uint32_t lcid)
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{
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if (lcid >= SRSRAN_N_MCH_LCIDS) {
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logger.error("Radio bearer id must be in [0:%d] - %d", SRSRAN_N_RADIO_BEARERS, lcid);
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return false;
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}
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return pdcp_array_mrb.find(lcid) != pdcp_array_mrb.end();
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}
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void pdcp::get_metrics(pdcp_metrics_t& m, const uint32_t nof_tti)
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{
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std::chrono::duration<double> secs = std::chrono::high_resolution_clock::now() - metrics_tp;
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for (pdcp_map_t::iterator it = pdcp_array.begin(); it != pdcp_array.end(); ++it) {
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pdcp_bearer_metrics_t metrics = it->second->get_metrics();
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// Rx/Tx rate based on real time
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double rx_rate_mbps_real_time = (metrics.num_rx_pdu_bytes * 8 / (double)1e6) / secs.count();
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double tx_rate_mbps_real_time = (metrics.num_tx_pdu_bytes * 8 / (double)1e6) / secs.count();
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// Rx/Tx rate based on number of TTIs
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double rx_rate_mbps = (nof_tti > 0) ? ((metrics.num_rx_pdu_bytes * 8 / (double)1e6) / (nof_tti / 1000.0)) : 0.0;
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double tx_rate_mbps = (nof_tti > 0) ? ((metrics.num_tx_pdu_bytes * 8 / (double)1e6) / (nof_tti / 1000.0)) : 0.0;
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logger.debug("lcid=%d, rx_rate_mbps=%4.2f (real=%4.2f), tx_rate_mbps=%4.2f (real=%4.2f)",
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it->first,
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rx_rate_mbps,
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rx_rate_mbps_real_time,
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tx_rate_mbps,
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tx_rate_mbps_real_time);
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m.bearer[it->first] = metrics;
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}
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reset_metrics();
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}
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void pdcp::reset_metrics()
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{
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for (pdcp_map_t::iterator it = pdcp_array.begin(); it != pdcp_array.end(); ++it) {
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it->second->reset_metrics();
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}
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metrics_tp = std::chrono::high_resolution_clock::now();
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}
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} // namespace srsran
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