srsRAN_4G/lib/include/srsran/interfaces/gnb_ngap_interfaces.h

/**
 * Copyright 2013-2022 Software Radio Systems Limited
 *
 * This file is part of srsRAN.
 *
 * srsRAN 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.
 *
 * srsRAN 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 SRSRAN_GNB_NGAP_INTERFACES_H
#define SRSRAN_GNB_NGAP_INTERFACES_H

#include "srsran/asn1/ngap_utils.h"

namespace srsenb {

const static int SRSRAN_NUM_SLICE = 3;
struct nssai_t {
  bool     active = false;
  uint64_t sst;
  uint64_t sd;
};

struct ngap_args_t {
  uint32_t    gnb_id                  = 0; // 20-bit id (lsb bits)
  uint8_t     cell_id                 = 0; // 8-bit cell id
  uint16_t    tac                     = 0; // 16-bit tac
  uint16_t    mcc                     = 0; // BCD-coded with 0xF filler
  uint16_t    mnc                     = 0; // BCD-coded with 0xF filler
  std::array<nssai_t, 3> nssai                   = {{{true, 1, 0}, {false, 2, 0}, {false, 3, 0}}};
  std::string            amf_addr                = "";
  std::string            gtp_bind_addr           = "";
  std::string            gtp_advertise_addr      = "";
  std::string            ngc_bind_addr           = "";
  std::string            gnb_name                = "";
};

// NGAP interface for RRC
class ngap_interface_rrc_nr
{
public:
  virtual void initial_ue(uint16_t                             rnti,
                          uint32_t                             gnb_cc_idx,
                          asn1::ngap::rrcestablishment_cause_e cause,
                          srsran::const_byte_span              pdu) = 0;
  virtual void initial_ue(uint16_t                             rnti,
                          uint32_t                             gnb_cc_idx,
                          asn1::ngap::rrcestablishment_cause_e cause,
                          srsran::const_byte_span              pdu,
                          uint32_t                             m_tmsi)             = 0;

  virtual void write_pdu(uint16_t rnti, srsran::const_byte_span pdu)                              = 0;
  virtual bool user_exists(uint16_t rnti)                                                         = 0;
  virtual void user_mod(uint16_t old_rnti, uint16_t new_rnti)                                     = 0;
  virtual void user_release_request(uint16_t rnti, asn1::ngap::cause_radio_network_e cause_radio) = 0;
  virtual bool is_amf_connected()                                                                 = 0;
  virtual void ue_notify_rrc_reconf_complete(uint16_t rnti, bool outcome)                         = 0;
};

} // namespace srsenb

#endif // SRSRAN_GNB_NGAP_INTERFACES_H