/*
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* Licensed to the Apache Software Foundation (ASF) under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. The ASF licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing,
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* software distributed under the License is distributed on an
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* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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* KIND, either express or implied. See the License for the
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* specific language governing permissions and limitations
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* under the License.
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*/
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#include <string.h>
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#include "host/ble_hs_adv.h"
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#include "host/ble_ibeacon.h"
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#include "ble_hs_priv.h"
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#define BLE_IBEACON_MFG_DATA_SIZE 25
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/**
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* Configures the device to advertise iBeacons.
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*
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* @param uuid The 128-bit UUID to advertise.
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* @param major The major version number to include in
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* iBeacons.
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* @param minor The minor version number to include in
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* iBeacons.
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* @param measured_power The Measured Power (RSSI value at 1 Meter).
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*
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* @return 0 on success;
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* BLE_HS_EBUSY if advertising is in progress;
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* Other nonzero on failure.
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*/
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int
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ble_ibeacon_set_adv_data(void *uuid128, uint16_t major,
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uint16_t minor, int8_t measured_power)
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{
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struct ble_hs_adv_fields fields;
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uint8_t buf[BLE_IBEACON_MFG_DATA_SIZE];
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int rc;
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/** Company identifier (Apple). */
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buf[0] = 0x4c;
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buf[1] = 0x00;
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/** iBeacon indicator. */
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buf[2] = 0x02;
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buf[3] = 0x15;
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/** UUID. */
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memcpy(buf + 4, uuid128, 16);
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/** Version number. */
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put_be16(buf + 20, major);
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put_be16(buf + 22, minor);
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/* Measured Power ranging data (Calibrated tx power at 1 meters). */
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if (measured_power < -126 || measured_power > 20) {
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return BLE_HS_EINVAL;
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}
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buf[24] = measured_power;
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memset(&fields, 0, sizeof fields);
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fields.mfg_data = buf;
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fields.mfg_data_len = sizeof buf;
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/* Advertise two flags:
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* o Discoverability in forthcoming advertisement (general)
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* o BLE-only (BR/EDR unsupported).
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*/
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fields.flags = BLE_HS_ADV_F_DISC_GEN |
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BLE_HS_ADV_F_BREDR_UNSUP;
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rc = ble_gap_adv_set_fields(&fields);
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return rc;
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}
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