text: /*
   * Licensed to the Apache Software Foundation (ASF) under one
   * or more contributor license agreements.  See the NOTICE file
   * distributed with this work for additional information
   * regarding copyright ownership.  The ASF licenses this file
   * to you under the Apache License, Version 2.0 (the
   * "License"); you may not use this file except in compliance
   * with the License.  You may obtain a copy of the License at
   *
   *  http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing,
   * software distributed under the License is distributed on an
   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
   * KIND, either express or implied.  See the License for the
   * specific language governing permissions and limitations
   * under the License.
   */
  
  #ifndef H_BLE_LL_CONN_PRIV_
  #define H_BLE_LL_CONN_PRIV_
  
  #include "controller/ble_ll_conn.h"
  #include "controller/ble_ll_hci.h"
  
  #ifdef __cplusplus
  extern "C" {
  #endif
  
  /*
   * Definitions for min/max RX/TX time/bytes values allowed for connections.
   * Source: Core 5.0 specification, Vol 6, Part B, section 4.5.10
   */
  #define BLE_LL_CONN_SUPP_TIME_MIN           (328)   /* usecs */
  #define BLE_LL_CONN_SUPP_TIME_MAX           (17040) /* usecs */
  #define BLE_LL_CONN_SUPP_TIME_MIN_UNCODED   (328)   /* usecs */
  #define BLE_LL_CONN_SUPP_TIME_MAX_UNCODED   (2120)  /* usecs */
  #define BLE_LL_CONN_SUPP_TIME_MIN_CODED     (2704)  /* usecs */
  #define BLE_LL_CONN_SUPP_TIME_MAX_CODED     (17040) /* usecs */
  #define BLE_LL_CONN_SUPP_BYTES_MIN          (27)    /* bytes */
  #define BLE_LL_CONN_SUPP_BYTES_MAX          (251)   /* bytes */
  
  /* Connection event timing */
  #define BLE_LL_CONN_INITIAL_OFFSET          (1250)
  #define BLE_LL_CONN_ITVL_USECS              (1250)
  #define BLE_LL_CONN_TX_WIN_USECS            (1250)
  #define BLE_LL_CONN_TX_OFF_USECS            (1250)
  #define BLE_LL_CONN_CE_USECS                (625)
  #define BLE_LL_CONN_TX_WIN_MIN              (1)         /* in tx win units */
  #define BLE_LL_CONN_SLAVE_LATENCY_MAX       (499)
  
  /* Connection handle range */
  #define BLE_LL_CONN_MAX_CONN_HANDLE         (0x0EFF)
  
  /* Offset (in bytes) of advertising address in connect request */
  #define BLE_LL_CONN_REQ_ADVA_OFF    (BLE_LL_PDU_HDR_LEN + BLE_DEV_ADDR_LEN)
  
  /* Default authenticated payload timeout (30 seconds; in 10 msecs increments) */
  #define BLE_LL_CONN_DEF_AUTH_PYLD_TMO       (3000)
  #define BLE_LL_CONN_AUTH_PYLD_OS_TMO(x)     ble_npl_time_ms_to_ticks32((x) * 10)
  
  /* Global Link Layer connection parameters */
  struct ble_ll_conn_global_params
  {
      uint8_t master_chan_map[BLE_LL_CONN_CHMAP_LEN];
      uint8_t num_used_chans;
      uint8_t supp_max_tx_octets;
      uint8_t supp_max_rx_octets;
      uint8_t conn_init_max_tx_octets;
      uint8_t sugg_tx_octets;
      uint16_t sugg_tx_time;
      uint16_t conn_init_max_tx_time;
      uint16_t conn_init_max_tx_time_uncoded;
      uint16_t conn_init_max_tx_time_coded;
      uint16_t supp_max_tx_time;
      uint16_t supp_max_rx_time;
  };
  extern struct ble_ll_conn_global_params g_ble_ll_conn_params;
  
  #if MYNEWT_VAL(BLE_LL_CFG_FEAT_LL_PERIODIC_ADV_SYNC_TRANSFER)
  struct ble_ll_conn_sync_transfer_params
  {
      uint32_t sync_timeout_us;
      uint16_t max_skip;
      uint8_t  mode;
  };
  extern struct ble_ll_conn_sync_transfer_params g_ble_ll_conn_sync_transfer_params;
  #endif
  
  /* Some data structures used by other LL routines */
  SLIST_HEAD(ble_ll_conn_active_list, ble_ll_conn_sm);
  STAILQ_HEAD(ble_ll_conn_free_list, ble_ll_conn_sm);
  extern struct ble_ll_conn_active_list g_ble_ll_conn_active_list;
  extern struct ble_ll_conn_free_list g_ble_ll_conn_free_list;
  
  struct ble_ll_conn_create_scan {
      uint8_t filter_policy;
      uint8_t own_addr_type;
      uint8_t peer_addr_type;
      uint8_t peer_addr[BLE_DEV_ADDR_LEN];
  #if MYNEWT_VAL(BLE_LL_CFG_FEAT_LL_EXT_ADV)
      uint8_t init_phy_mask;
  #endif
      struct {
          uint16_t itvl;
          uint16_t window;
      } scan_params[2];
  };
  
  struct ble_ll_conn_create_params {
      uint32_t conn_itvl;
      uint32_t conn_itvl_ticks;
      uint8_t conn_itvl_usecs;
      uint16_t conn_latency;
      uint16_t supervision_timeout;
      uint16_t min_ce_len;
      uint16_t max_ce_len;
  };
  
  struct ble_ll_conn_create_sm {
      struct ble_ll_conn_sm *connsm;
  #if MYNEWT_VAL(BLE_LL_CFG_FEAT_LL_EXT_ADV)
      struct ble_ll_conn_create_params params[3];
  #endif
  };
  
  extern struct ble_ll_conn_create_sm g_ble_ll_conn_create_sm;
  
  /* Generic interface */
  struct ble_ll_len_req;
  struct ble_mbuf_hdr;
  struct ble_ll_adv_sm;
  
  struct hci_create_conn
  {
      uint16_t scan_itvl;
      uint16_t scan_window;
      uint8_t filter_policy;
      uint8_t peer_addr_type;
      uint8_t peer_addr[BLE_DEV_ADDR_LEN];
      uint8_t own_addr_type;
      uint16_t conn_itvl_min;
      uint16_t conn_itvl_max;
      uint16_t conn_latency;
      uint16_t supervision_timeout;
      uint16_t min_ce_len;
      uint16_t max_ce_len;
  };
  
  void ble_ll_conn_sm_new(struct ble_ll_conn_sm *connsm);
  void ble_ll_conn_end(struct ble_ll_conn_sm *connsm, uint8_t ble_err);
  void ble_ll_conn_enqueue_pkt(struct ble_ll_conn_sm *connsm, struct os_mbuf *om,
                               uint8_t hdr_byte, uint16_t length);
  struct ble_ll_conn_sm *ble_ll_conn_sm_get(void);
  void ble_ll_conn_master_init(struct ble_ll_conn_sm *connsm,
                               struct ble_ll_conn_create_scan *cc_scan,
                               struct ble_ll_conn_create_params *cc_params);
  
  struct ble_ll_conn_sm *ble_ll_conn_find_active_conn(uint16_t handle);
  void ble_ll_conn_update_eff_data_len(struct ble_ll_conn_sm *connsm);
  
  /* Advertising interface */
  int ble_ll_conn_slave_start(uint8_t *rxbuf, uint8_t pat,
                              struct ble_mbuf_hdr *rxhdr, bool force_csa2);
  
  /* Link Layer interface */
  void ble_ll_conn_module_init(void);
  void ble_ll_conn_set_global_chanmap(uint8_t num_used_chans, const uint8_t *chanmap);
  void ble_ll_conn_module_reset(void);
  void ble_ll_conn_tx_pkt_in(struct os_mbuf *om, uint16_t handle, uint16_t len);
  int ble_ll_conn_rx_isr_start(struct ble_mbuf_hdr *rxhdr, uint32_t aa);
  int ble_ll_conn_rx_isr_end(uint8_t *rxbuf, struct ble_mbuf_hdr *rxhdr);
  void ble_ll_conn_rx_data_pdu(struct os_mbuf *rxpdu, struct ble_mbuf_hdr *hdr);
  void ble_ll_conn_wfr_timer_exp(void);
  int ble_ll_conn_is_lru(struct ble_ll_conn_sm *s1, struct ble_ll_conn_sm *s2);
  uint32_t ble_ll_conn_get_ce_end_time(void);
  void ble_ll_conn_event_halt(void);
  /* HCI */
  void ble_ll_disconn_comp_event_send(struct ble_ll_conn_sm *connsm,
                                      uint8_t reason);
  void ble_ll_auth_pyld_tmo_event_send(struct ble_ll_conn_sm *connsm);
  int ble_ll_conn_hci_disconnect_cmd(const struct ble_hci_lc_disconnect_cp *cmd);
  int ble_ll_conn_hci_rd_rem_ver_cmd(const uint8_t *cmdbuf, uint8_t len);
  int ble_ll_conn_hci_create(const uint8_t *cmdbuf, uint8_t len);
  int ble_ll_conn_hci_update(const uint8_t *cmdbuf, uint8_t len);
  int ble_ll_conn_hci_set_chan_class(const uint8_t *cmdbuf, uint8_t len);
  int ble_ll_conn_hci_param_rr(const uint8_t *cmdbuf, uint8_t len,
                               uint8_t *rspbuf, uint8_t *rsplen);
  int ble_ll_conn_hci_param_nrr(const uint8_t *cmdbuf, uint8_t len,
                               uint8_t *rspbuf, uint8_t *rsplen);
  int ble_ll_conn_create_cancel(ble_ll_hci_post_cmd_complete_cb *post_cmd_cb);
  void ble_ll_conn_num_comp_pkts_event_send(struct ble_ll_conn_sm *connsm);
  void ble_ll_conn_comp_event_send(struct ble_ll_conn_sm *connsm, uint8_t status,
                                   uint8_t *evbuf, struct ble_ll_adv_sm *advsm);
  void ble_ll_conn_timeout(struct ble_ll_conn_sm *connsm, uint8_t ble_err);
  int ble_ll_conn_hci_chk_conn_params(uint16_t itvl_min, uint16_t itvl_max,
                                      uint16_t latency, uint16_t spvn_tmo);
  int ble_ll_conn_hci_read_rem_features(const uint8_t *cmdbuf, uint8_t len);
  int ble_ll_conn_hci_rd_rssi(const uint8_t *cmdbuf, uint8_t len, uint8_t *rspbuf,
                              uint8_t *rsplen);
  int ble_ll_conn_hci_rd_chan_map(const uint8_t *cmdbuf, uint8_t len,
                                  uint8_t *rspbuf, uint8_t *rsplen);
  int ble_ll_conn_hci_set_data_len(const uint8_t *cmdbuf, uint8_t len,
                                   uint8_t *rspbuf, uint8_t *rsplen);
  int ble_ll_conn_hci_le_start_encrypt(const uint8_t *cmdbuf, uint8_t len);
  int ble_ll_conn_hci_le_ltk_reply(const uint8_t *cmdbuf, uint8_t len,
                                   uint8_t *rspbuf, uint8_t *rsplen);
  int ble_ll_conn_hci_le_ltk_neg_reply(const uint8_t *cmdbuf, uint8_t len,
                                       uint8_t *rspbuf, uint8_t *rsplen);
  int ble_ll_conn_hci_wr_auth_pyld_tmo(const uint8_t *cmdbuf, uint8_t len,
                                       uint8_t *rspbuf, uint8_t *rsplen);
  int ble_ll_conn_hci_rd_auth_pyld_tmo(const uint8_t *cmdbuf, uint8_t len,
                                       uint8_t *rspbuf, uint8_t *rsplen);
  #if MYNEWT_VAL(BLE_LL_CFG_FEAT_LL_SCA_UPDATE)
  int ble_ll_conn_req_peer_sca(const uint8_t *cmdbuf, uint8_t len,
                               uint8_t *rspbuf, uint8_t *rsplen);
  #endif
  
  #if MYNEWT_VAL(BLE_LL_CFG_FEAT_LE_PING)
  void ble_ll_conn_auth_pyld_timer_start(struct ble_ll_conn_sm *connsm);
  #else
  #define ble_ll_conn_auth_pyld_timer_start(x)
  #endif
  
  #if MYNEWT_VAL(BLE_LL_CFG_FEAT_CTRL_TO_HOST_FLOW_CONTROL)
  void ble_ll_conn_cth_flow_set_buffers(uint16_t num_buffers);
  bool ble_ll_conn_cth_flow_enable(bool enabled);
  void ble_ll_conn_cth_flow_process_cmd(const uint8_t *cmdbuf);
  #endif
  
  void ble_ll_conn_itvl_to_ticks(uint32_t itvl,
                                 uint32_t *itvl_ticks, uint8_t *itvl_usecs);
  
  int ble_ll_hci_cmd_rx(uint8_t *cmd, void *arg);
  int ble_ll_hci_acl_rx(struct os_mbuf *om, void *arg);
  
  int ble_ll_conn_hci_le_rd_phy(const uint8_t *cmdbuf, uint8_t len,
                                uint8_t *rsp, uint8_t *rsplen);
  int ble_ll_conn_hci_le_set_phy(const uint8_t *cmdbuf, uint8_t len);
  int ble_ll_conn_chk_phy_upd_start(struct ble_ll_conn_sm *connsm);
  #if MYNEWT_VAL(BLE_LL_CFG_FEAT_LL_EXT_ADV)
  int ble_ll_conn_hci_ext_create(const uint8_t *cmdbuf, uint8_t len);
  #endif
  
  #if MYNEWT_VAL(BLE_LL_CFG_FEAT_LL_PERIODIC_ADV_SYNC_TRANSFER)
  int ble_ll_set_sync_transfer_params(const uint8_t *cmdbuf, uint8_t len,
                                      uint8_t *rspbuf, uint8_t *rsplen);
  int ble_ll_set_default_sync_transfer_params(const uint8_t *cmdbuf, uint8_t len);
  #endif
  
  #ifdef __cplusplus
  }
  #endif
  
  #endif /* H_BLE_LL_CONN_PRIV_ */
  