srsRAN_4G/lib/include/srslte/upper/pdcp.h

/**
 *
 * \section COPYRIGHT
 *
 * Copyright 2013-2015 Software Radio Systems Limited
 *
 * \section LICENSE
 *
 * This file is part of the srsUE library.
 *
 * 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 PDCP_H
#define PDCP_H

#include "srslte/common/log.h"
#include "srslte/common/common.h"
#include "srslte/interfaces/ue_interfaces.h"
#include "srslte/upper/pdcp_entity.h"

namespace srslte {

class pdcp
    :public srsue::pdcp_interface_gw
    ,public srsue::pdcp_interface_rlc
    ,public srsue::pdcp_interface_rrc
{
public:
  pdcp();
  virtual ~pdcp(){}
  void init(srsue::rlc_interface_pdcp *rlc_,
            srsue::rrc_interface_pdcp *rrc_,
            srsue::gw_interface_pdcp *gw_,
            log *pdcp_log_,
            uint32_t lcid_,
            uint8_t direction_);
  void stop();

  // GW interface
  bool is_drb_enabled(uint32_t lcid);

  // RRC interface
  void reestablish();
  void reset();
  void write_sdu(uint32_t lcid, byte_buffer_t *sdu);
  void add_bearer(uint32_t lcid, srslte_pdcp_config_t cnfg = srslte_pdcp_config_t());
  void config_security(uint32_t lcid,
                       uint8_t *k_enc,
                       uint8_t *k_int,
                       CIPHERING_ALGORITHM_ID_ENUM cipher_algo,
                       INTEGRITY_ALGORITHM_ID_ENUM integ_algo);
  void config_security_all(uint8_t *k_enc,
                           uint8_t *k_int,
                           CIPHERING_ALGORITHM_ID_ENUM cipher_algo,
                           INTEGRITY_ALGORITHM_ID_ENUM integ_algo);
  void enable_integrity(uint32_t lcid);
  void enable_encryption(uint32_t lcid);

  // RLC interface
  void write_pdu(uint32_t lcid, byte_buffer_t *sdu);
  void write_pdu_bcch_bch(byte_buffer_t *sdu);
  void write_pdu_bcch_dlsch(byte_buffer_t *sdu);
  void write_pdu_pcch(byte_buffer_t *sdu);

private:
  srsue::rlc_interface_pdcp *rlc;
  srsue::rrc_interface_pdcp *rrc;
  srsue::gw_interface_pdcp  *gw;

  log                       *pdcp_log;
  pdcp_entity                pdcp_array[SRSLTE_N_RADIO_BEARERS];
  uint32_t                   lcid; // default LCID that is maintained active by PDCP instance
  uint8_t                    direction;

  bool valid_lcid(uint32_t lcid);
};

} // namespace srsue


#endif // PDCP_H