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services/URIBeacon2Service.h@148:0072d73e966f, 2014-11-28 (annotated)

Committer:
rgrover1
Date:
Fri Nov 28 14:11:19 2014 +0000
Revision:
148:0072d73e966f
Parent:
147:f772d9b93808
Child:
149:6a7666d72a83
Synchronized with git rev 74849dd9

Author: Rohit Grover

fleshed out encodeURIData to detect prefixes.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
rgrover1 147:f772d9b93808 1 /* mbed Microcontroller Library
rgrover1 147:f772d9b93808 2 * Copyright (c) 2006-2013 ARM Limited
rgrover1 147:f772d9b93808 3 *
rgrover1 147:f772d9b93808 4 * Licensed under the Apache License, Version 2.0 (the "License");
rgrover1 147:f772d9b93808 5 * you may not use this file except in compliance with the License.
rgrover1 147:f772d9b93808 6 * You may obtain a copy of the License at
rgrover1 147:f772d9b93808 7 *
rgrover1 147:f772d9b93808 8 * http://www.apache.org/licenses/LICENSE-2.0
rgrover1 147:f772d9b93808 9 *
rgrover1 147:f772d9b93808 10 * Unless required by applicable law or agreed to in writing, software
rgrover1 147:f772d9b93808 11 * distributed under the License is distributed on an "AS IS" BASIS,
rgrover1 147:f772d9b93808 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
rgrover1 147:f772d9b93808 13 * See the License for the specific language governing permissions and
rgrover1 147:f772d9b93808 14 * limitations under the License.
rgrover1 147:f772d9b93808 15 */
rgrover1 147:f772d9b93808 16
rgrover1 147:f772d9b93808 17 #ifndef __BLE_URI_BEACON_2_SERVICE_H__
rgrover1 147:f772d9b93808 18 #define __BLE_URI_BEACON_2_SERVICE_H__
rgrover1 147:f772d9b93808 19
rgrover1 147:f772d9b93808 20 #include "BLEDevice.h"
rgrover1 147:f772d9b93808 21
rgrover1 147:f772d9b93808 22 class URIBeacon2Service {
rgrover1 147:f772d9b93808 23 public:
rgrover1 147:f772d9b93808 24
rgrover1 147:f772d9b93808 25 // ee0c2080-8786-40ba-ab96-99b91ac981d8
rgrover1 147:f772d9b93808 26
rgrover1 148:0072d73e966f 27 URIBeacon2Service(BLEDevice &ble_, const char *urldata, size_t sizeofURLData) : ble(ble_), payloadIndex(0), payload() {
rgrover1 147:f772d9b93808 28 if ((sizeofURLData + 4) > 24) {
rgrover1 147:f772d9b93808 29 return;
rgrover1 147:f772d9b93808 30 }
rgrover1 147:f772d9b93808 31
rgrover1 147:f772d9b93808 32 const uint8_t BEACON_UUID[] = {0xD8, 0xFE};
rgrover1 147:f772d9b93808 33
rgrover1 148:0072d73e966f 34 payload[payloadIndex++] = BEACON_UUID[0];
rgrover1 148:0072d73e966f 35 payload[payloadIndex++] = BEACON_UUID[1];
rgrover1 148:0072d73e966f 36 payload[payloadIndex++] = 0x00; /* flags */
rgrover1 148:0072d73e966f 37 payload[payloadIndex++] = 0x20; /* power */
rgrover1 148:0072d73e966f 38 size_t encodedBytes = encodeURIData(urldata, sizeofURLData);
rgrover1 147:f772d9b93808 39
rgrover1 147:f772d9b93808 40 ble.accumulateAdvertisingPayload(GapAdvertisingData::COMPLETE_LIST_16BIT_SERVICE_IDS, BEACON_UUID, sizeof(BEACON_UUID));
rgrover1 148:0072d73e966f 41 ble.accumulateAdvertisingPayload(GapAdvertisingData::SERVICE_DATA, payload, encodedBytes + 4);
rgrover1 147:f772d9b93808 42 }
rgrover1 147:f772d9b93808 43
rgrover1 147:f772d9b93808 44 private:
rgrover1 148:0072d73e966f 45 size_t encodeURIData(const char *urldata, size_t sizeofURLData) {
rgrover1 148:0072d73e966f 46 if (sizeofURLData == 0) {
rgrover1 148:0072d73e966f 47 return 0;
rgrover1 148:0072d73e966f 48 }
rgrover1 148:0072d73e966f 49
rgrover1 148:0072d73e966f 50 const char *prefixes[] = {
rgrover1 148:0072d73e966f 51 "http://www.",
rgrover1 148:0072d73e966f 52 "https://www.",
rgrover1 148:0072d73e966f 53 "http://",
rgrover1 148:0072d73e966f 54 "https://",
rgrover1 148:0072d73e966f 55 "urn:uuid:"
rgrover1 148:0072d73e966f 56 };
rgrover1 148:0072d73e966f 57 size_t encodedBytes = 0;
rgrover1 148:0072d73e966f 58
rgrover1 148:0072d73e966f 59 const size_t NUM_PREFIXES = sizeof(prefixes) / sizeof(char *);
rgrover1 148:0072d73e966f 60 for (unsigned i = 0; i < NUM_PREFIXES; i++) {
rgrover1 148:0072d73e966f 61 size_t prefixLen = strlen(prefixes[i]);
rgrover1 148:0072d73e966f 62 if (strncmp(urldata, prefixes[i], prefixLen) == 0) {
rgrover1 148:0072d73e966f 63 payload[payloadIndex++] = i;
rgrover1 148:0072d73e966f 64 ++encodedBytes;
rgrover1 148:0072d73e966f 65
rgrover1 148:0072d73e966f 66 urldata += prefixLen;
rgrover1 148:0072d73e966f 67 sizeofURLData -= prefixLen;
rgrover1 148:0072d73e966f 68 break;
rgrover1 148:0072d73e966f 69 }
rgrover1 148:0072d73e966f 70 }
rgrover1 148:0072d73e966f 71
rgrover1 148:0072d73e966f 72 memcpy(&payload[payloadIndex], urldata, sizeofURLData);
rgrover1 148:0072d73e966f 73 encodedBytes += sizeofURLData;
rgrover1 148:0072d73e966f 74
rgrover1 148:0072d73e966f 75 return encodedBytes;
rgrover1 147:f772d9b93808 76 }
rgrover1 147:f772d9b93808 77
rgrover1 148:0072d73e966f 78 // size_t encodePrefix(const char *&urldata, )
rgrover1 148:0072d73e966f 79
rgrover1 147:f772d9b93808 80 // URIBeacon2Service(BLEDevice &_ble, uint8_t level = 100) :
rgrover1 147:f772d9b93808 81 // ble(_ble),
rgrover1 147:f772d9b93808 82 // batteryLevel(level),
rgrover1 147:f772d9b93808 83 // batteryLevelCharacteristic(GattCharacteristic::UUID_BATTERY_LEVEL_CHAR, &batteryLevel, sizeof(batteryLevel), sizeof(batteryLevel),
rgrover1 147:f772d9b93808 84 // GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_READ | GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_NOTIFY) {
rgrover1 147:f772d9b93808 85
rgrover1 147:f772d9b93808 86 // static bool serviceAdded = false; /* We should only ever need to add the heart rate service once. */
rgrover1 147:f772d9b93808 87 // if (serviceAdded) {
rgrover1 147:f772d9b93808 88 // return;
rgrover1 147:f772d9b93808 89 // }
rgrover1 147:f772d9b93808 90
rgrover1 147:f772d9b93808 91 // GattCharacteristic *charTable[] = {&batteryLevelCharacteristic};
rgrover1 147:f772d9b93808 92 // GattService batteryService(GattService::UUID_BATTERY_SERVICE, charTable, sizeof(charTable) / sizeof(GattCharacteristic *));
rgrover1 147:f772d9b93808 93
rgrover1 147:f772d9b93808 94 // ble.addService(batteryService);
rgrover1 147:f772d9b93808 95 // serviceAdded = true;
rgrover1 147:f772d9b93808 96 // }
rgrover1 147:f772d9b93808 97 //
rgrover1 147:f772d9b93808 98
rgrover1 147:f772d9b93808 99 private:
rgrover1 147:f772d9b93808 100 static const size_t MAX_SIZEOF_PAYLOAD = 32; /* TODO */
rgrover1 147:f772d9b93808 101
rgrover1 147:f772d9b93808 102 private:
rgrover1 147:f772d9b93808 103 BLEDevice &ble;
rgrover1 148:0072d73e966f 104
rgrover1 148:0072d73e966f 105 size_t payloadIndex;
rgrover1 147:f772d9b93808 106 uint8_t payload[MAX_SIZEOF_PAYLOAD];
rgrover1 147:f772d9b93808 107 // uint8_t batteryLevel;
rgrover1 147:f772d9b93808 108 // GattCharacteristic batteryLevelCharacteristic;
rgrover1 147:f772d9b93808 109 };
rgrover1 147:f772d9b93808 110
rgrover1 147:f772d9b93808 111 #endif /* #ifndef __BLE_URI_BEACON_2_SERVICE_H__*/