srsRAN_4G/lib/include/srslte/interfaces/ue_interfaces.h

/*
 * Copyright 2013-2019 Software Radio Systems Limited
 *
 * This file is part of srsLTE.
 *
 * srsLTE 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.
 *
 * srsLTE 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/.
 *
 */

/******************************************************************************
 * File:        interfaces.h
 * Description: Abstract base class interfaces provided by layers
 *              to other layers.
 *****************************************************************************/

#ifndef SRSLTE_UE_INTERFACES_H
#define SRSLTE_UE_INTERFACES_H

#include <string>

#include "rrc_interface_types.h"
#include "srslte/asn1/liblte_mme.h"
#include "srslte/common/common.h"
#include "srslte/common/interfaces_common.h"
#include "srslte/common/security.h"
#include "srslte/common/stack_procedure.h"
#include "srslte/interfaces/rrc_interface_types.h"
#include "srslte/phy/channel/channel.h"
#include "srslte/phy/rf/rf.h"

namespace srsue {

typedef enum {
  AUTH_OK,
  AUTH_FAILED,
  AUTH_SYNCH_FAILURE
} auth_result_t;

// USIM interface for NAS
class usim_interface_nas
{
public:
  virtual std::string get_imsi_str() = 0;
  virtual std::string get_imei_str() = 0;
  virtual bool get_imsi_vec(uint8_t* imsi_, uint32_t n) = 0;
  virtual bool get_imei_vec(uint8_t* imei_, uint32_t n) = 0;
  virtual bool          get_home_plmn_id(srslte::plmn_id_t* home_plmn_id)                 = 0;
  virtual auth_result_t generate_authentication_response(uint8_t  *rand,
                                                uint8_t  *autn_enb,
                                                uint16_t  mcc,
                                                uint16_t  mnc,
                                                uint8_t  *res,
                                                int      *res_len,
                                                uint8_t  *k_asme) = 0;
  virtual void generate_nas_keys(uint8_t *k_asme,
                                 uint8_t *k_nas_enc,
                                 uint8_t *k_nas_int,
                                 srslte::CIPHERING_ALGORITHM_ID_ENUM cipher_algo,
                                 srslte::INTEGRITY_ALGORITHM_ID_ENUM integ_algo) = 0;
};

// USIM interface for RRC
class usim_interface_rrc
{
public:
  virtual void generate_as_keys(uint8_t *k_asme,
                                uint32_t count_ul,
                                uint8_t *k_rrc_enc,
                                uint8_t *k_rrc_int,
                                uint8_t *k_up_enc,
                                uint8_t *k_up_int,
                                srslte::CIPHERING_ALGORITHM_ID_ENUM cipher_algo,
                                srslte::INTEGRITY_ALGORITHM_ID_ENUM integ_algo) = 0;
  virtual void generate_as_keys_ho(uint32_t pci,
                                   uint32_t earfcn,
                                   int ncc,
                                   uint8_t *k_rrc_enc,
                                   uint8_t *k_rrc_int,
                                   uint8_t *k_up_enc,
                                   uint8_t *k_up_int,
                                   srslte::CIPHERING_ALGORITHM_ID_ENUM cipher_algo,
                                   srslte::INTEGRITY_ALGORITHM_ID_ENUM integ_algo) = 0;
};

// GW interface for NAS
class gw_interface_nas
{
public:
  virtual int setup_if_addr(uint32_t lcid, uint8_t pdn_type, uint32_t ip_addr, uint8_t* ipv6_if_id, char* err_str) = 0;
  virtual int apply_traffic_flow_template(const uint8_t&                                 eps_bearer_id,
                                          const uint8_t&                                 lcid,
                                          const LIBLTE_MME_TRAFFIC_FLOW_TEMPLATE_STRUCT* tft)                      = 0;
};

// GW interface for RRC
class gw_interface_rrc
{
public:
  virtual void add_mch_port(uint32_t lcid, uint32_t port) = 0;
};

// GW interface for PDCP
class gw_interface_pdcp
{
public:
  virtual void write_pdu(uint32_t lcid, srslte::unique_byte_buffer_t pdu)     = 0;
  virtual void write_pdu_mch(uint32_t lcid, srslte::unique_byte_buffer_t pdu) = 0;
};

// RRC interface for MAC
class rrc_interface_mac_common
{
public:
  virtual void ra_problem() = 0;
};

class rrc_interface_mac : public rrc_interface_mac_common
{
public:
  virtual void ho_ra_completed(bool ra_successful) = 0;
  virtual void release_pucch_srs() = 0;
};

// RRC interface for PHY
class rrc_interface_phy_lte
{
public:
  virtual void in_sync() = 0;
  virtual void out_of_sync() = 0;
  virtual void new_phy_meas(float rsrp, float rsrq, uint32_t tti, int earfcn = -1, int pci = -1) = 0;
};

// RRC interface for NAS
class rrc_interface_nas
{
public:
  typedef struct {
    srslte::plmn_id_t    plmn_id;
    uint16_t             tac;
  } found_plmn_t;

  const static int MAX_FOUND_PLMNS = 16;

  virtual void        write_sdu(srslte::unique_byte_buffer_t sdu)                           = 0;
  virtual uint16_t    get_mcc()                                                             = 0;
  virtual uint16_t    get_mnc()                                                             = 0;
  virtual void        enable_capabilities()                                                 = 0;
  virtual bool        plmn_search()                                                         = 0;
  virtual void        plmn_select(srslte::plmn_id_t plmn_id)                                = 0;
  virtual bool        connection_request(srslte::establishment_cause_t cause,
                                         srslte::unique_byte_buffer_t     dedicatedInfoNAS) = 0;
  virtual void        set_ue_identity(srslte::s_tmsi_t s_tmsi)                              = 0;
  virtual bool        is_connected()                                                        = 0;
  virtual void        paging_completed(bool outcome)                                        = 0;
  virtual std::string get_rb_name(uint32_t lcid)                                            = 0;
  virtual uint32_t    get_lcid_for_eps_bearer(const uint32_t& eps_bearer_id)                = 0;
};

// RRC interface for PDCP
class rrc_interface_pdcp
{
public:
  virtual void        write_pdu(uint32_t lcid, srslte::unique_byte_buffer_t pdu)     = 0;
  virtual void        write_pdu_bcch_bch(srslte::unique_byte_buffer_t pdu)           = 0;
  virtual void        write_pdu_bcch_dlsch(srslte::unique_byte_buffer_t pdu)         = 0;
  virtual void        write_pdu_pcch(srslte::unique_byte_buffer_t pdu)               = 0;
  virtual void        write_pdu_mch(uint32_t lcid, srslte::unique_byte_buffer_t pdu) = 0;
  virtual std::string get_rb_name(uint32_t lcid)                                     = 0;
};

// RRC interface for RLC
class rrc_interface_rlc
{
public:
  virtual void        max_retx_attempted()                                       = 0;
  virtual std::string get_rb_name(uint32_t lcid)                                 = 0;
  virtual void        write_pdu(uint32_t lcid, srslte::unique_byte_buffer_t pdu) = 0;
};

// NAS interface for RRC
class nas_interface_rrc
{
public:
  typedef enum { BARRING_NONE = 0, BARRING_MO_DATA, BARRING_MO_SIGNALLING, BARRING_MT, BARRING_ALL } barring_t;
  virtual void     left_rrc_connected()                                       = 0;
  virtual void     set_barring(barring_t barring)                             = 0;
  virtual bool     paging(srslte::s_tmsi_t* ue_identity)                      = 0;
  virtual bool     is_attached()                                              = 0;
  virtual void     write_pdu(uint32_t lcid, srslte::unique_byte_buffer_t pdu) = 0;
  virtual uint32_t get_k_enb_count()                                          = 0;
  virtual bool     get_k_asme(uint8_t* k_asme_, uint32_t n)                   = 0;
  virtual uint32_t get_ipv4_addr()                                            = 0;
  virtual bool     get_ipv6_addr(uint8_t* ipv6_addr)                          = 0;
  virtual void
               plmn_search_completed(const rrc_interface_nas::found_plmn_t found_plmns[rrc_interface_nas::MAX_FOUND_PLMNS],
                                     int                                   nof_plmns)       = 0;
  virtual bool connection_request_completed(bool outcome) = 0;
  virtual void run_tti(uint32_t tti)                      = 0;
};

// NAS interface for UE
class nas_interface_ue
{
public:
  virtual void start_attach_request(srslte::proc_state_t* proc_result, srslte::establishment_cause_t cause_) = 0;
  virtual bool detach_request(const bool switch_off)                                                         = 0;
};

// PDCP interface for RRC
class pdcp_interface_rrc
{
public:
  virtual void reestablish()                                                                    = 0;
  virtual void reestablish(uint32_t lcid)                                                       = 0;
  virtual void reset()                                                                          = 0;
  virtual void write_sdu(uint32_t lcid, srslte::unique_byte_buffer_t sdu, bool blocking = true) = 0;
  virtual void add_bearer(uint32_t lcid, srslte::pdcp_config_t cnfg)                            = 0;
  virtual void change_lcid(uint32_t old_lcid, uint32_t new_lcid)                                = 0;
  virtual void config_security(uint32_t                            lcid,
                               uint8_t*                            k_rrc_enc_,
                               uint8_t*                            k_rrc_int_,
                               uint8_t*                            k_up_enc_,
                               srslte::CIPHERING_ALGORITHM_ID_ENUM cipher_algo_,
                               srslte::INTEGRITY_ALGORITHM_ID_ENUM integ_algo_)                 = 0;
  virtual void config_security_all(uint8_t*                            k_rrc_enc_,
                                   uint8_t*                            k_rrc_int_,
                                   uint8_t*                            k_up_enc_,
                                   srslte::CIPHERING_ALGORITHM_ID_ENUM cipher_algo_,
                                   srslte::INTEGRITY_ALGORITHM_ID_ENUM integ_algo_)             = 0;
  virtual void enable_integrity(uint32_t lcid)                                                  = 0;
  virtual void enable_encryption(uint32_t lcid)                                                 = 0;
};

// PDCP interface for RLC
class pdcp_interface_rlc
{
public:
  /* RLC calls PDCP to push a PDCP PDU. */
  virtual void write_pdu(uint32_t lcid, srslte::unique_byte_buffer_t sdu)     = 0;
  virtual void write_pdu_bcch_bch(srslte::unique_byte_buffer_t sdu)           = 0;
  virtual void write_pdu_bcch_dlsch(srslte::unique_byte_buffer_t sdu)         = 0;
  virtual void write_pdu_pcch(srslte::unique_byte_buffer_t sdu)               = 0;
  virtual void write_pdu_mch(uint32_t lcid, srslte::unique_byte_buffer_t sdu) = 0;
};

class pdcp_interface_gw
{
public:
  virtual void write_sdu(uint32_t lcid, srslte::unique_byte_buffer_t sdu, bool blocking) = 0;
  virtual bool is_lcid_enabled(uint32_t lcid)                                            = 0;
};

// RLC interface for RRC
class rlc_interface_rrc
{
public:
  virtual void reset()                                                                          = 0;
  virtual void reestablish()                                                                    = 0;
  virtual void reestablish(uint32_t lcid)                                                       = 0;
  virtual void add_bearer(uint32_t lcid, srslte::rlc_config_t cnfg)                             = 0;
  virtual void add_bearer_mrb(uint32_t lcid)                                                    = 0;
  virtual void del_bearer(uint32_t lcid)                                                        = 0;
  virtual void suspend_bearer(uint32_t lcid)                                                    = 0;
  virtual void resume_bearer(uint32_t lcid)                                = 0;
  virtual void change_lcid(uint32_t old_lcid, uint32_t new_lcid)                                = 0;
  virtual bool has_bearer(uint32_t lcid)                                                        = 0;
  virtual bool has_data(const uint32_t lcid)                               = 0;
  virtual void write_sdu(uint32_t lcid, srslte::unique_byte_buffer_t sdu, bool blocking = true) = 0;
};

// RLC interface for PDCP
class rlc_interface_pdcp
{
public:
  /* PDCP calls RLC to push an RLC SDU. SDU gets placed into the RLC buffer and MAC pulls
   * RLC PDUs according to TB size. */
  virtual void write_sdu(uint32_t lcid, srslte::unique_byte_buffer_t sdu, bool blocking = true) = 0;
  virtual void discard_sdu(uint32_t discard_sn)                                                 = 0;
  virtual bool rb_is_um(uint32_t lcid)                                                          = 0;
};

//RLC interface for MAC
class rlc_interface_mac : public srslte::read_pdu_interface
{
public:
  /* MAC calls has_data() to query whether a logical channel has data to transmit (without
   * knowing how much. This function should return quickly. */
  virtual bool has_data(const uint32_t lcid) = 0;

  /* MAC calls RLC to get the buffer state for a logical channel. */
  virtual uint32_t get_buffer_state(const uint32_t lcid) = 0;

  const static int MAX_PDU_SEGMENTS = 20;

  /* MAC calls RLC to get RLC segment of nof_bytes length.
   * Segmentation happens in this function. RLC PDU is stored in payload. */
  virtual int     read_pdu(uint32_t lcid, uint8_t *payload, uint32_t nof_bytes) = 0;

  /* MAC calls RLC to push an RLC PDU. This function is called from an independent MAC thread.
   * PDU gets placed into the buffer and higher layer thread gets notified. */
  virtual void write_pdu(uint32_t lcid, uint8_t *payload, uint32_t nof_bytes) = 0;
  virtual void write_pdu_bcch_bch(uint8_t *payload, uint32_t nof_bytes) = 0;
  virtual void write_pdu_bcch_dlsch(uint8_t *payload, uint32_t nof_bytes) = 0;
  virtual void write_pdu_pcch(uint8_t *payload, uint32_t nof_bytes) = 0;
  virtual void write_pdu_mch(uint32_t lcid, uint8_t *payload, uint32_t nof_bytes) = 0;
};

/** MAC interface 
 *
 */
/* Interface PHY -> MAC */
class mac_interface_phy_lte
{
public:
  typedef struct {
    uint32_t nof_mbsfn_services;
  } mac_phy_cfg_mbsfn_t;

  typedef struct {
    uint32_t tbs;
    bool     ndi;
    bool     ndi_present;
    int      rv;
  } mac_tb_t;

  typedef struct {
    mac_tb_t tb[SRSLTE_MAX_TB];
    uint32_t pid;
    uint16_t rnti;
    bool     is_sps_release;
    uint32_t tti;
  } mac_grant_dl_t;

  typedef struct {
    mac_tb_t tb;
    uint32_t pid;
    uint16_t rnti;
    bool     phich_available;
    bool     hi_value;
    uint32_t tti_tx;
  } mac_grant_ul_t;

  typedef struct {
    bool     enabled;
    uint32_t rv;
    uint8_t* payload;
    union {
      srslte_softbuffer_rx_t* rx;
      srslte_softbuffer_tx_t* tx;
    } softbuffer;
  } tb_action_t;

  typedef struct {
    tb_action_t tb[SRSLTE_MAX_TB];

    bool generate_ack;
  } tb_action_dl_t;

  typedef struct {
    tb_action_t             tb;
    uint32_t                current_tx_nb;
    bool                    expect_ack;
  } tb_action_ul_t;

  /* Query the MAC for the current RNTI to look for
   */
  virtual uint16_t get_dl_sched_rnti(uint32_t tti) = 0;
  virtual uint16_t get_ul_sched_rnti(uint32_t tti) = 0;

  /* Indicate reception of UL dci.
   * payload_ptr points to memory where MAC PDU must be written by MAC layer */
  virtual void new_grant_ul(uint32_t cc_idx, mac_grant_ul_t grant, tb_action_ul_t* action) = 0;

  /* Indicate reception of DL dci. */
  virtual void new_grant_dl(uint32_t cc_idx, mac_grant_dl_t grant, tb_action_dl_t* action) = 0;

  /* Indicate successful decoding of PDSCH AND PCH TB. */
  virtual void tb_decoded(uint32_t cc_idx, mac_grant_dl_t grant, bool ack[SRSLTE_MAX_CODEWORDS]) = 0;

  /* Indicate successful decoding of BCH TB through PBCH */
  virtual void bch_decoded_ok(uint8_t* payload, uint32_t len) = 0;

  /* Indicate successful decoding of MCH TB through PMCH */
  virtual void mch_decoded(uint32_t len, bool crc) = 0;

  /* Obtain action for a new MCH subframe. */
  virtual void new_mch_dl(srslte_pdsch_grant_t phy_grant, tb_action_dl_t* action) = 0;

  /* Communicate the number of mbsfn services available  */
  virtual void set_mbsfn_config(uint32_t nof_mbsfn_services) = 0;

  /* Indicate new TTI */
  virtual void run_tti(const uint32_t tti) = 0;
};

/* Interface RRC -> MAC shared between different RATs */
class mac_interface_rrc_common
{
public:
  // Class to handle UE specific RNTIs between RRC and MAC
  typedef struct {
    uint16_t crnti;
    uint16_t rar_rnti;
    uint16_t temp_rnti;
    uint16_t tpc_rnti;
    uint16_t sps_rnti;
    uint64_t contention_id;
  } ue_rnti_t;

};

/* Interface RRC -> MAC */
class mac_interface_rrc : public mac_interface_rrc_common
{
public:
  virtual void clear_rntis() = 0;

  /* Instructs the MAC to start receiving BCCH */
  virtual void bcch_start_rx(int si_window_start, int si_window_length) = 0;
  virtual void bcch_stop_rx()                                           = 0;

  /* Instructs the MAC to start receiving PCCH */
  virtual void pcch_start_rx() = 0;

  /* RRC configures a logical channel */
  virtual void setup_lcid(uint32_t lcid, uint32_t lcg, uint32_t priority, int PBR_x_tti, uint32_t BSD) = 0;

  /* Instructs the MAC to start receiving an MCH */
  virtual void mch_start_rx(uint32_t lcid) = 0;

  virtual uint32_t get_current_tti() = 0;

  virtual void set_config(srslte::mac_cfg_t& mac_cfg) = 0;

  virtual void get_rntis(ue_rnti_t *rntis) = 0;
  virtual void set_contention_id(uint64_t uecri) = 0;
  virtual void set_ho_rnti(uint16_t crnti, uint16_t target_pci) = 0;

  virtual void start_noncont_ho(uint32_t preamble_index, uint32_t prach_mask) = 0;
  virtual void start_cont_ho() = 0;

  virtual void reconfiguration(const uint32_t& cc_idx, const bool& enable) = 0;
  virtual void reset() = 0;
  virtual void wait_uplink() = 0;
  virtual void set_enable_ra_proc(bool en)                                 = 0;
};

/** PHY interface 
 *
 */

typedef struct {
  uint32_t radio_idx;
  uint32_t channel_idx;
} carrier_map_t;

typedef struct {
  std::string    type;
  srslte::phy_log_args_t log;

  std::string           dl_earfcn;   // comma-separated list of EARFCNs
  std::vector<uint32_t> earfcn_list; // vectorized version of dl_earfcn that gets populated during init

  float dl_freq;
  float ul_freq;

  bool  ul_pwr_ctrl_en;
  float prach_gain;
  int   pdsch_max_its;
  bool  attach_enable_64qam;
  int   nof_phy_threads;

  int worker_cpu_mask;
  int sync_cpu_affinity;

  uint32_t      nof_carriers;
  uint32_t      nof_radios;
  uint32_t      nof_rx_ant;
  uint32_t      nof_rf_channels;
  carrier_map_t carrier_map[SRSLTE_MAX_CARRIERS];
  std::string   equalizer_mode;
  int           cqi_max;
  int           cqi_fixed;
  float         snr_ema_coeff;
  std::string   snr_estim_alg;
  bool          agc_enable;
  bool          cfo_is_doppler;
  bool          cfo_integer_enabled;
  float         cfo_correct_tol_hz;
  float         cfo_pss_ema;
  float         cfo_ref_ema;
  float         cfo_loop_bw_pss;
  float         cfo_loop_bw_ref;
  float         cfo_loop_ref_min;
  float         cfo_loop_pss_tol;
  float         sfo_ema;
  uint32_t      sfo_correct_period;
  uint32_t      cfo_loop_pss_conv;
  uint32_t      cfo_ref_mask;
  bool          interpolate_subframe_enabled;
  bool          estimator_fil_auto;
  float         estimator_fil_stddev;
  uint32_t      estimator_fil_order;
  float         snr_to_cqi_offset;
  std::string   sss_algorithm;
  bool          sic_pss_enabled;
  float         rx_gain_offset;
  bool          pdsch_csi_enabled;
  bool          pdsch_8bit_decoder;
  uint32_t      intra_freq_meas_len_ms;
  uint32_t      intra_freq_meas_period_ms;
  bool          pregenerate_signals;
  float         force_ul_amplitude;

  srslte::channel::args_t dl_channel_args;
  srslte::channel::args_t ul_channel_args;
} phy_args_t;

/* RAT agnostic Interface MAC -> PHY */
class phy_interface_mac_common
{
public:
  /* Sets a C-RNTI allowing the PHY to pregenerate signals if necessary */
  virtual void set_crnti(uint16_t rnti) = 0;

  /* Time advance commands */
  virtual void set_timeadv_rar(uint32_t ta_cmd) = 0;
  virtual void set_timeadv(uint32_t ta_cmd) = 0;

  /* Activate / Disactivate SCell*/
  virtual void set_activation_deactivation_scell(uint32_t cmd) = 0;

  /* Sets RAR dci payload */
  virtual void set_rar_grant(uint8_t grant_payload[SRSLTE_RAR_GRANT_LEN], uint16_t rnti) = 0;

  virtual uint32_t get_current_tti() = 0;

  virtual float get_phr() = 0;
  virtual float get_pathloss_db() = 0;
};

/* Interface MAC -> PHY */
class phy_interface_mac_lte : public phy_interface_mac_common
{
public:
  typedef struct {
    bool     is_transmitted;
    uint32_t tti_ra;
    uint32_t f_id;
    uint32_t preamble_format;
  } prach_info_t;

  /* Configure PRACH using parameters written by RRC */
  virtual void configure_prach_params() = 0;

  virtual void         prach_send(uint32_t preamble_idx, int allowed_subframe, float target_power_dbm) = 0;
  virtual prach_info_t prach_get_info()                                                                = 0;

  /* Indicates the transmission of a SR signal in the next opportunity */
  virtual void sr_send() = 0;  
  virtual int  sr_last_tx_tti() = 0; 

  virtual void set_mch_period_stop(uint32_t stop) = 0;
};

class phy_interface_rrc_lte
{
public:
  virtual void     get_current_cell(srslte_cell_t* cell, uint32_t* current_earfcn = NULL) = 0;
  virtual uint32_t get_current_earfcn()                                                   = 0;
  virtual uint32_t get_current_pci()                                                      = 0;

  virtual void set_config(srslte::phy_cfg_t& config,
                          uint32_t           cc_idx    = 0,
                          uint32_t           earfcn    = 0,
                          srslte_cell_t*     cell_info = nullptr)                             = 0;
  virtual void set_config_tdd(srslte_tdd_config_t& tdd_config)                            = 0;
  virtual void set_config_mbsfn_sib2(srslte::mbsfn_sf_cfg_t* cfg_list, uint32_t nof_cfgs) = 0;
  virtual void set_config_mbsfn_sib13(const srslte::sib13_t& sib13)                       = 0;
  virtual void set_config_mbsfn_mcch(const srslte::mcch_msg_t& mcch)                      = 0;

  /* Measurements interface */
  virtual void meas_reset()                              = 0;
  virtual int  meas_start(uint32_t earfcn, int pci = -1) = 0;
  virtual int  meas_stop(uint32_t earfcn, int pci = -1) = 0;

  typedef struct {
    enum {CELL_FOUND = 0, CELL_NOT_FOUND, ERROR} found;
    enum { MORE_FREQS = 0, NO_MORE_FREQS } last_freq;
  } cell_search_ret_t;

  typedef struct {
    srslte_cell_t cell;
    uint32_t      earfcn;
  } phy_cell_t;

  /* Cell search and selection procedures */
  virtual cell_search_ret_t  cell_search(phy_cell_t *cell) = 0;
  virtual bool cell_select(phy_cell_t *cell = NULL) = 0;
  virtual bool cell_is_camping() = 0;

  virtual void reset() = 0;

  virtual void enable_pregen_signals(bool enable) = 0;
};

// STACK interface for GW
class stack_interface_gw : public pdcp_interface_gw
{
public:
  virtual bool switch_on() = 0;
};

class gw_interface_stack : public gw_interface_nas, public gw_interface_rrc, public gw_interface_pdcp
{
};

// STACK interface for MAC
class stack_interface_mac
{
public:
  virtual void process_pdus()                    = 0;
  virtual void wait_ra_completion(uint16_t rnti) = 0;
};

// STACK interface for RRC
class stack_interface_rrc
{
public:
  virtual void start_cell_search() = 0;
};

// Combined interface for PHY to access stack (MAC and RRC)
class stack_interface_phy_lte : public mac_interface_phy_lte, public rrc_interface_phy_lte
{
};

// Combined interface for stack (MAC and RRC) to access PHY
class phy_interface_stack_lte : public phy_interface_mac_lte, public phy_interface_rrc_lte
{
};

} // namespace srsue

#endif // SRSLTE_UE_INTERFACES_H