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66 lines
1.7 KiB
C
66 lines
1.7 KiB
C
/*
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* Copyright (C) 2018 Freie Universität Berlin
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*
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* This file is subject to the terms and conditions of the GNU Lesser
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* General Public License v2.1. See the file LICENSE in the top level
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* directory for more details.
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*/
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/**
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* @ingroup ble_skald_ibeacon
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* @{
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*
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* @file
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* @brief Skald's iBeacon implementation
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*
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* @author Hauke Petersen <hauke.petersen@fu-berlin.de>
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*
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* @}
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*/
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#include <string.h>
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#include "byteorder.h"
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#include "net/skald/ibeacon.h"
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#define PREFIX_LEN (9U)
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/**
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* @brief PDU format for iBeacon packets
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*/
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typedef struct __attribute__((packed)) {
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uint8_t txadd[BLE_ADDR_LEN];
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uint8_t prefix[PREFIX_LEN];
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skald_uuid_t uuid;
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be_uint16_t major;
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be_uint16_t minor;
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uint8_t txpower;
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} ibeacon_t;
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/* constant GAP type value fields, fixed for the iBeacon format */
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static const uint8_t prefix[PREFIX_LEN] = { 0x02, 0x01, 0x06, 0x1a, 0xff,
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0x4c, 0x00, 0x02, 0x15 };
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void skald_ibeacon_advertise(skald_ctx_t *ctx, const skald_uuid_t *uuid,
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uint16_t major, uint16_t minor, uint8_t txpower,
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uint32_t adv_itvl_ms)
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{
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/* configure the iBeacon PDU */
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ibeacon_t *pdu = (ibeacon_t *)ctx->pkt.pdu;
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ctx->pkt.len = (uint8_t)sizeof(ibeacon_t);
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ctx->adv_itvl_ms = adv_itvl_ms;
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skald_generate_random_addr(pdu->txadd);
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memcpy(pdu->prefix, prefix, PREFIX_LEN);
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memcpy(&pdu->uuid, uuid, sizeof(skald_uuid_t));
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be_uint16_t tmp = byteorder_htons(major);
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memcpy(&pdu->major, &tmp, sizeof(uint16_t));
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tmp = byteorder_htons(minor);
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memcpy(&pdu->minor, &tmp, sizeof(uint16_t));
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pdu->txpower = txpower;
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skald_adv_start(ctx);
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}
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