mirror of https://github.com/PentHertz/srsLTE.git
73 lines
2.1 KiB
C++
73 lines
2.1 KiB
C++
/**
|
|
*
|
|
* \section COPYRIGHT
|
|
*
|
|
* Copyright 2013-2021 Software Radio Systems Limited
|
|
*
|
|
* By using this file, you agree to the terms and conditions set
|
|
* forth in the LICENSE file which can be found at the top level of
|
|
* the distribution.
|
|
*
|
|
*/
|
|
|
|
#ifndef SRSUE_BEARER_MANAGER_H
|
|
#define SRSUE_BEARER_MANAGER_H
|
|
|
|
#include "srsran/common/common.h"
|
|
#include "srsran/common/rwlock_guard.h"
|
|
#include "srsran/srslog/srslog.h"
|
|
#include <map>
|
|
#include <stdint.h>
|
|
|
|
namespace srsue {
|
|
|
|
/**
|
|
* @brief Helper class to manage the mapping between EPS bearer and radio bearer
|
|
*
|
|
* The class maps EPS bearers that are known to NAS and GW and radio bearer (RB) that
|
|
* are only known to RRC. Since the lifetime of a EPS bearer is usually longer
|
|
* than the lifetime of a RB, the GW needs to query the Stack to check whether a
|
|
* given EPS bearer is active, i.e. a DRB is established, or not.
|
|
*
|
|
* The class also maps between RATs since each LCID can exist on either EUTRA or NR RATs, or both.
|
|
*
|
|
* Since the access of this class is happening from two different threads (GW+RRC/Stack)
|
|
* it's public interface is protected.
|
|
*
|
|
*/
|
|
class bearer_manager
|
|
{
|
|
public:
|
|
bearer_manager();
|
|
~bearer_manager();
|
|
|
|
// RRC interface
|
|
/// Registers EPS bearer with PDCP RAT type and LCID
|
|
void add_eps_bearer(uint8_t eps_bearer_id, srsran::srsran_rat_t rat, uint32_t lcid);
|
|
|
|
/// Single EPS bearer is removed from map when the associated DRB is deleted
|
|
void remove_eps_bearer(uint8_t eps_bearer_id);
|
|
|
|
/// All registered bearer are removed (e.g. after connection release)
|
|
void reset();
|
|
|
|
// GW interface
|
|
bool has_active_radio_bearer(uint32_t eps_bearer_id);
|
|
|
|
// Stack interface to retrieve active RB
|
|
struct radio_bearer_t {
|
|
srsran::srsran_rat_t rat;
|
|
uint32_t lcid;
|
|
};
|
|
radio_bearer_t& get_radio_bearer(uint32_t eps_bearer_id);
|
|
|
|
private:
|
|
pthread_rwlock_t rwlock = {}; /// RW lock to protect access from RRC/GW threads
|
|
srslog::basic_logger& logger;
|
|
std::map<uint32_t, radio_bearer_t> eps_rb_map;
|
|
radio_bearer_t invalid_rb = {srsran::srsran_rat_t::nulltype, 0};
|
|
};
|
|
|
|
} // namespace srsue
|
|
|
|
#endif // SRSUE_BEARER_MANAGER_H
|