pinebuds/services/ble_profiles/find/findl/src/findl_task.c

/**
 ****************************************************************************************
 * @addtogroup FINDLTASK
 * @{
 ****************************************************************************************
 */

/*
 * INCLUDE FILES
 ****************************************************************************************
 */

#include "rwip_config.h"

#if (BLE_FINDME_LOCATOR)
#include "co_utils.h"
#include "findl.h"
#include "findl_task.h"
#include "gap.h"
#include "gapc.h"
#include "gapc_task.h"
#include "gattc_task.h"
#include "prf_utils.h"
#include <stdint.h>

#include "ke_mem.h"

/// table used to retrieve immediate alert service characteristics information
const struct prf_char_def findl_ias_char[FINDL_IAS_CHAR_MAX] = {
    [FINDL_ALERT_LVL_CHAR] = {ATT_CHAR_ALERT_LEVEL, ATT_MANDATORY,
                              ATT_CHAR_PROP_WR_NO_RESP},
};

/*
 * FUNCTION DEFINITIONS
 ****************************************************************************************
 */

/**
 ****************************************************************************************
 * @brief Handles reception of the @ref FINDL_ENABLE_REQ message.
 * The handler enables the Find Me profile - Locator Role.
 * @param[in] msgid Id of the message received (probably unused).
 * @param[in] param Pointer to the parameters of the message.
 * @param[in] dest_id ID of the receiving task instance (probably unused).
 * @param[in] src_id ID of the sending task instance.
 * @return If the message was consumed or not.
 ****************************************************************************************
 */
__STATIC int findl_enable_req_handler(ke_msg_id_t const msgid,
                                      struct findl_enable_req const *param,
                                      ke_task_id_t const dest_id,
                                      ke_task_id_t const src_id) {
  // Status
  uint8_t status = GAP_ERR_NO_ERROR;

  uint8_t state = ke_state_get(dest_id);
  uint8_t conidx = KE_IDX_GET(dest_id);
  // Find me Locator Role Task Environment
  struct findl_env_tag *findl_env = PRF_ENV_GET(FINDL, findl);

  ASSERT_INFO(findl_env != NULL, dest_id, src_id);
  if ((state == FINDL_IDLE) && (findl_env->env[conidx] == NULL)) {
    // allocate environment variable for task instance
    findl_env->env[conidx] = (struct findl_cnx_env *)ke_malloc(
        sizeof(struct findl_cnx_env), KE_MEM_ATT_DB);
    memset(findl_env->env[conidx], 0, sizeof(struct findl_cnx_env));

    // Config connection, start discovering
    if (param->con_type == PRF_CON_DISCOVERY) {
      // start discovering IAS on peer
      prf_disc_svc_send(&(findl_env->prf_env), conidx, ATT_SVC_IMMEDIATE_ALERT);

      // Go to DISCOVERING state
      ke_state_set(dest_id, FINDL_DISCOVERING);
    }
    // normal connection, get saved att details
    else {
      findl_env->env[conidx]->ias = param->ias;

      // send APP confirmation that can start normal connection to TH
      findl_enable_rsp_send(findl_env, conidx, GAP_ERR_NO_ERROR);
    }
  } else if (state != FINDL_FREE) {
    status = PRF_ERR_REQ_DISALLOWED;
  }

  // send an error if request fails
  if (status != GAP_ERR_NO_ERROR) {
    findl_enable_rsp_send(findl_env, conidx, status);
  }

  return (KE_MSG_CONSUMED);
}

/**
 ****************************************************************************************
 * @brief Handles reception of the @ref GATTC_SDP_SVC_IND_HANDLER message.
 * The handler stores the found service details for service discovery.
 * @param[in] msgid Id of the message received (probably unused).
 * @param[in] param Pointer to the parameters of the message.
 * @param[in] dest_id ID of the receiving task instance (probably unused).
 * @param[in] src_id ID of the sending task instance.
 * @return If the message was consumed or not.
 ****************************************************************************************
 */
__STATIC int gattc_sdp_svc_ind_handler(ke_msg_id_t const msgid,
                                       struct gattc_sdp_svc_ind const *ind,
                                       ke_task_id_t const dest_id,
                                       ke_task_id_t const src_id) {
  uint8_t state = ke_state_get(dest_id);

  if (state == FINDL_DISCOVERING) {
    uint8_t conidx = KE_IDX_GET(dest_id);
    // Get the address of the environment
    struct findl_env_tag *findl_env = PRF_ENV_GET(FINDL, findl);

    ASSERT_INFO(findl_env != NULL, dest_id, src_id);
    ASSERT_INFO(findl_env->env[conidx] != NULL, dest_id, src_id);

    if (findl_env->env[conidx]->nb_svc == 0) {
      // Retrieve IAS characteristic
      prf_extract_svc_info(ind, FINDL_IAS_CHAR_MAX, &findl_ias_char[0],
                           &(findl_env->env[conidx]->ias.alert_lvl_char), 0,
                           NULL, NULL);

      // Even if we get multiple responses we only store 1 range
      findl_env->env[conidx]->ias.svc.shdl = ind->start_hdl;
      findl_env->env[conidx]->ias.svc.ehdl = ind->end_hdl;
    }

    findl_env->env[conidx]->nb_svc++;
  }

  return (KE_MSG_CONSUMED);
}

/**
 ****************************************************************************************
 * @brief Handles reception of the @ref FINDL_SET_ALERT_REQ message.
 * The handler disables the Find Me profile - Target Role.
 * @param[in] msgid Id of the message received (probably unused).
 * @param[in] param Pointer to the parameters of the message.
 * @param[in] dest_id ID of the receiving task instance (probably unused).
 * @param[in] src_id ID of the sending task instance.
 * @return If the message was consumed or not.
 ****************************************************************************************
 */
__STATIC int findl_set_alert_req_handler(
    ke_msg_id_t const msgid, struct findl_set_alert_req const *param,
    ke_task_id_t const dest_id, ke_task_id_t const src_id) {
  // Status
  uint8_t status = GAP_ERR_NO_ERROR;
  // Get the address of the environment
  struct findl_env_tag *findl_env = PRF_ENV_GET(FINDL, findl);
  uint8_t conidx = KE_IDX_GET(dest_id);
  uint8_t state = ke_state_get(dest_id);
  int msg_status = KE_MSG_CONSUMED;

  if (state == FINDL_IDLE) {
    // check if discovery performed
    if (findl_env->env[conidx] == NULL) {
      status = PRF_ERR_REQ_DISALLOWED;
    }
    // Check we're sending a correct value
    else if ((param->alert_lvl == FINDL_ALERT_NONE) ||
             (param->alert_lvl == FINDL_ALERT_MILD) ||
             (param->alert_lvl == FINDL_ALERT_HIGH)) {
      if (findl_env->env[conidx]->ias.alert_lvl_char.char_hdl != 0x0000) {
        // Send GATT Write Request
        prf_gatt_write(&findl_env->prf_env, conidx,
                       findl_env->env[conidx]->ias.alert_lvl_char.val_hdl,
                       (uint8_t *)&param->alert_lvl, sizeof(uint8_t),
                       GATTC_WRITE_NO_RESPONSE);
        // wait for end of write request
        ke_state_set(dest_id, FINDL_BUSY);
      } else {
        // cannot set alert level because have no char handle for it
        status = PRF_ERR_INEXISTENT_HDL;
      }
    } else {
      // wrong level - not one of the possible 3
      status = PRF_ERR_INVALID_PARAM;
    }

    struct findl_set_alert_rsp *rsp =
        KE_MSG_ALLOC(FINDL_SET_ALERT_RSP, src_id, dest_id, findl_set_alert_rsp);
    // set error status
    rsp->status = status;

    ke_msg_send(rsp);
  } else if (state != FINDL_FREE) {
    msg_status = KE_MSG_SAVED;
    ;
  }
  // else nothing to do - ignore message

  return (msg_status);
}

/**
 ****************************************************************************************
 * @brief Handles reception of the @ref GATTC_CMP_EVT message.
 * This generic event is received for different requests, so need to keep track.
 * @param[in] msgid Id of the message received (probably unused).
 * @param[in] param Pointer to the parameters of the message.
 * @param[in] dest_id ID of the receiving task instance (probably unused).
 * @param[in] src_id ID of the sending task instance.
 * @return If the message was consumed or not.
 ****************************************************************************************
 */
__STATIC int gattc_cmp_evt_handler(ke_msg_id_t const msgid,
                                   struct gattc_cmp_evt const *param,
                                   ke_task_id_t const dest_id,
                                   ke_task_id_t const src_id) {
  uint8_t state = ke_state_get(dest_id);
  // Get the address of the environment
  struct findl_env_tag *findl_env = PRF_ENV_GET(FINDL, findl);
  uint8_t conidx = KE_IDX_GET(dest_id);

  if (state == FINDL_DISCOVERING) {
    uint8_t status = param->status;

    if (param->status == ATT_ERR_NO_ERROR) {
      if (findl_env->env[conidx]->nb_svc == 1) {
        status = prf_check_svc_char_validity(
            FINDL_IAS_CHAR_MAX, &(findl_env->env[conidx]->ias.alert_lvl_char),
            findl_ias_char);
      }
      // too much services
      else if (findl_env->env[conidx]->nb_svc > 1) {
        status = PRF_ERR_MULTIPLE_SVC;
      }
      // no services found
      else {
        status = PRF_ERR_INVALID_PARAM;
      }
    }

    findl_enable_rsp_send(findl_env, conidx, status);
  } else if (state == FINDL_BUSY) {
    ke_state_set(dest_id, FINDL_IDLE);
  }

  return (KE_MSG_CONSUMED);
}

/*
 * GLOBAL VARIABLE DEFINITIONS
 ****************************************************************************************
 */

/// Default State handlers definition
KE_MSG_HANDLER_TAB(findl){
    {FINDL_ENABLE_REQ, (ke_msg_func_t)findl_enable_req_handler},
    {GATTC_CMP_EVT, (ke_msg_func_t)gattc_cmp_evt_handler},
    {GATTC_SDP_SVC_IND, (ke_msg_func_t)gattc_sdp_svc_ind_handler},
    {FINDL_SET_ALERT_REQ, (ke_msg_func_t)findl_set_alert_req_handler},
};

void findl_task_init(struct ke_task_desc *task_desc) {
  // Get the address of the environment
  struct findl_env_tag *findl_env = PRF_ENV_GET(FINDL, findl);

  task_desc->msg_handler_tab = findl_msg_handler_tab;
  task_desc->msg_cnt = ARRAY_LEN(findl_msg_handler_tab);
  task_desc->state = findl_env->state;
  task_desc->idx_max = FINDL_IDX_MAX;
}

#endif // BLE_FINDME_LOCATOR

/// @} FINDLTASK