| /* |
| * 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. |
| */ |
| |
| #include <string.h> |
| #include "host/ble_hs_adv.h" |
| #include "ble_hs_priv.h" |
| |
| #define BLE_IBEACON_MFG_DATA_SIZE 25 |
| |
| /** |
| * Configures the device to advertise iBeacons. |
| * |
| * @param uuid The 128-bit UUID to advertise. |
| * @param major The major version number to include in |
| * iBeacons. |
| * @param minor The minor version number to include in |
| * iBeacons. |
| * @param measured_power The Measured Power (RSSI value at 1 Meter). |
| * |
| * @return 0 on success; |
| * BLE_HS_EBUSY if advertising is in progress; |
| * Other nonzero on failure. |
| */ |
| int |
| ble_ibeacon_set_adv_data(void *uuid128, uint16_t major, |
| uint16_t minor, int8_t measured_power) |
| { |
| struct ble_hs_adv_fields fields; |
| uint8_t buf[BLE_IBEACON_MFG_DATA_SIZE]; |
| int rc; |
| |
| /** Company identifier (Apple). */ |
| buf[0] = 0x4c; |
| buf[1] = 0x00; |
| |
| /** iBeacon indicator. */ |
| buf[2] = 0x02; |
| buf[3] = 0x15; |
| |
| /** UUID. */ |
| memcpy(buf + 4, uuid128, 16); |
| |
| /** Version number. */ |
| put_be16(buf + 20, major); |
| put_be16(buf + 22, minor); |
| |
| /* Measured Power ranging data (Calibrated tx power at 1 meters). */ |
| if (measured_power < -126 || measured_power > 20) { |
| return BLE_HS_EINVAL; |
| } |
| buf[24] = measured_power; |
| |
| memset(&fields, 0, sizeof fields); |
| fields.mfg_data = buf; |
| fields.mfg_data_len = sizeof buf; |
| |
| /* Advertise two flags: |
| * o Discoverability in forthcoming advertisement (general) |
| * o BLE-only (BR/EDR unsupported). |
| */ |
| fields.flags = BLE_HS_ADV_F_DISC_GEN | |
| BLE_HS_ADV_F_BREDR_UNSUP; |
| |
| rc = ble_gap_adv_set_fields(&fields); |
| return rc; |
| } |