mirror of https://github.com/pvnis/srsRAN_4G.git
You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
92 lines
2.9 KiB
C
92 lines
2.9 KiB
C
3 years ago
|
/**
|
||
|
|
*
|
||
|
|
* \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 SRSRAN_BEARER_MANAGER_H
|
||
|
|
#define SRSRAN_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 srsran {
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @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 (UE) or GTPU (eNB)
|
||
|
|
* to 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/GTPU 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.
|
||
|
|
*
|
||
|
|
* The class provides two interfaces to be used with RNTI or without. The version without
|
||
|
|
* RNTI is used by the UE. The version with RNTI in the interface is intented to be
|
||
|
|
* used by the eNB.
|
||
|
|
*
|
||
|
|
*/
|
||
|
|
class bearer_manager
|
||
|
|
{
|
||
|
|
public:
|
||
|
|
bearer_manager();
|
||
|
|
~bearer_manager();
|
||
|
|
|
||
|
|
struct radio_bearer_t {
|
||
|
|
srsran::srsran_rat_t rat;
|
||
|
|
uint32_t lcid;
|
||
|
|
};
|
||
|
|
|
||
|
|
/// Single user interface (for UE)
|
||
|
|
|
||
|
|
// 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
|
||
|
|
radio_bearer_t get_radio_bearer(uint32_t eps_bearer_id);
|
||
|
|
|
||
|
|
/// Multi-user interface (see comments above)
|
||
|
|
void add_eps_bearer(uint16_t rnti, uint8_t eps_bearer_id, srsran::srsran_rat_t rat, uint32_t lcid);
|
||
|
|
void remove_eps_bearer(uint16_t rnti, uint8_t eps_bearer_id);
|
||
|
|
void reset(uint16_t rnti);
|
||
|
|
bool has_active_radio_bearer(uint16_t rnti, uint32_t eps_bearer_id);
|
||
|
|
radio_bearer_t get_radio_bearer(uint16_t rnti, uint32_t eps_bearer_id);
|
||
|
|
|
||
|
|
private:
|
||
|
|
pthread_rwlock_t rwlock = {}; /// RW lock to protect access from RRC/GW threads
|
||
|
|
srslog::basic_logger& logger;
|
||
|
|
|
||
|
|
typedef std::map<uint32_t, radio_bearer_t> eps_rb_map_t;
|
||
|
|
std::map<uint16_t, eps_rb_map_t> users_map;
|
||
|
|
|
||
|
|
const uint16_t default_key = 0xffff; // dummy RNTI used for public interface without explicit RNTI
|
||
|
|
radio_bearer_t invalid_rb = {srsran::srsran_rat_t::nulltype, 0};
|
||
|
|
};
|
||
|
|
|
||
|
|
} // namespace srsran
|
||
|
|
|
||
|
|
#endif // SRSRAN_BEARER_MANAGER_H
|