pinebuds/services/ble_profiles/prf/prf_utils_128.c

/**
 ****************************************************************************************
 * @addtogroup PRF_UTILS
 * @{
 ****************************************************************************************
 */

/*
 * INCLUDE FILES
 ****************************************************************************************
 */
#include "rwip_config.h"

#if (BLE_CLIENT_PRF)
#include "attm.h"
#include "co_error.h"
#include "gap.h"
#include "gapc.h"
#include "gattc_task.h"
#include "ke_mem.h"
#include "ke_task.h"
#include "prf_utils_128.h"
#include <stdbool.h>
#include <stdint.h>
#endif //(BLE_CLIENT_PRF)

#if (BLE_CLIENT_PRF)

void prf_disc_svc_send_128(prf_env_t *prf_env, uint8_t conidx,
                           uint8_t *uuid_128) {
  // send GATT discover primary services by UUID request: find by type request
  struct gattc_disc_cmd *svc_req = KE_MSG_ALLOC_DYN(
      GATTC_SDP_SVC_DISC_CMD, KE_BUILD_ID(TASK_GATTC, conidx),
      prf_src_task_get(prf_env, conidx), gattc_disc_cmd, ATT_UUID_128_LEN);

  // gatt request type: by UUID
  svc_req->operation = GATTC_SDP_DISC_SVC;
  // start handle;
  svc_req->start_hdl = ATT_1ST_REQ_START_HDL;
  // end handle
  svc_req->end_hdl = ATT_1ST_REQ_END_HDL;

  // UUID search
  svc_req->uuid_len = ATT_UUID_128_LEN;

  // set 128 bit UUID for searching
  memcpy(&svc_req->uuid[0], uuid_128, (sizeof(uint8_t) * ATT_UUID_128_LEN));

  // send the message to GATT, which will send back the response when it gets it
  ke_msg_send(svc_req);
}

uint8_t
prf_check_svc_char_validity_128(uint8_t nb_chars,
                                const struct prf_char_inf *chars,
                                const struct prf_char_def_128 *chars_req) {
  uint8_t status = GAP_ERR_NO_ERROR;
  uint8_t i;

  for (i = 0; ((i < nb_chars) && (status == GAP_ERR_NO_ERROR)); i++) {
    if (chars[i].char_hdl == ATT_INVALID_HANDLE) {
      // If Characteristic is not present, check requirements
      if (chars_req[i].req_flag == ATT_MANDATORY) {
        status = PRF_ERR_STOP_DISC_CHAR_MISSING;
      }
    } else {
      // If Characteristic is present, check properties
      if ((chars[i].prop & chars_req[i].prop_mand) != chars_req[i].prop_mand) {
        status = PRF_ERR_STOP_DISC_WRONG_CHAR_PROP;
      }
    }
  }

  return status;
}

void prf_extract_svc_info_128(const struct gattc_sdp_svc_ind *param,
                              uint8_t nb_chars,
                              const struct prf_char_def_128 *chars_req,
                              struct prf_char_inf *chars, uint8_t nb_descs,
                              const struct prf_char_desc_def *descs_req,
                              struct prf_char_desc_inf *descs) {
  // Counters
  uint8_t svc_char;
  uint8_t svc_desc;
  uint8_t fnd_att;

  for (fnd_att = 0; fnd_att < (param->end_hdl - param->start_hdl); fnd_att++) {
    if (param->info[fnd_att].att_type == GATTC_SDP_ATT_CHAR) {
      uint16_t char_hdl = param->start_hdl + 1 + fnd_att;
      uint16_t val_hdl = param->info[fnd_att].att_char.handle;
      uint8_t val_prop = param->info[fnd_att].att_char.prop;
      uint8_t char_idx = fnd_att;

      // check that value handle is in a valid range
      if ((val_hdl <= param->end_hdl) &&
          (val_hdl > (param->start_hdl + fnd_att))) {
        // retrieve value index
        uint8_t val_idx = (val_hdl - param->start_hdl - 1);

        // Look over requested characteristics
        for (svc_char = 0; svc_char < nb_chars; svc_char++) {
          // check if attribute is valid
          if ((chars[svc_char].char_hdl == ATT_INVALID_HDL) &&
              attm_uuid_comp(
                  (uint8_t *)param->info[val_idx].att.uuid, ATT_UUID_128_LEN,
                  (uint8_t *)chars_req[svc_char].uuid, ATT_UUID_128_LEN)) {
            // Save properties and handles
            chars[svc_char].char_hdl = char_hdl;
            chars[svc_char].val_hdl = val_hdl;
            chars[svc_char].prop = val_prop;

            // find end of characteristic handle and discover descriptors
            do {
              fnd_att++;

              // found a descriptor
              if (param->info[fnd_att].att_type == GATTC_SDP_ATT_DESC) {
                // Retrieve characteristic descriptor handle using UUID
                for (svc_desc = 0; svc_desc < nb_descs; svc_desc++) {
                  // check if it's expected descriptor
                  if ((descs[svc_desc].desc_hdl == ATT_INVALID_HANDLE) &&
                      (descs_req[svc_desc].char_code == svc_char) &&
                      (attm_uuid16_comp(
                          (uint8_t *)param->info[fnd_att].att.uuid,
                          param->info[fnd_att].att.uuid_len,
                          descs_req[svc_desc].uuid))) {
                    descs[svc_desc].desc_hdl = param->start_hdl + 1 + fnd_att;
                    // search for next descriptor
                    break;
                  }
                }
              }
            } while (((param->start_hdl + 1 + fnd_att) <= param->end_hdl) &&
                     (param->info[fnd_att].att_type != GATTC_SDP_ATT_CHAR) &&
                     (param->info[fnd_att].att_type != GATTC_SDP_INC_SVC));

            // return to previous valid value
            fnd_att--;
            // previous handle was end of the characteristic
            chars[svc_char].char_ehdl_off = fnd_att - char_idx;

            // search next characteristic
            break;
          }
        }
      }
    }
  }
}

#endif /*(BLE_SAMPLE128_CLIENT) */

/// @} PRF_UTILS