Wang Xinglu
High level Bluetooth Low Energy API and radio abstraction layer
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Bluetooth Low Energy
Diff: services/URIBeaconConfigService.h
- Revision:
- 716:11b41f651697
- Parent:
- 715:6d415ac147aa
- Child:
- 717:3129b149a6b2
--- a/services/URIBeaconConfigService.h Thu Jul 02 09:06:11 2015 +0100
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,467 +0,0 @@
-/* mbed Microcontroller Library
- * Copyright (c) 2006-2013 ARM Limited
- *
- * Licensed 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.
- */
-
-#ifndef SERVICES_URIBEACONCONFIGSERVICE_H_
-#define SERVICES_URIBEACONCONFIGSERVICE_H_
-
-#include "BLEDevice.h"
-#include "mbed.h"
-
-extern const uint8_t UUID_URI_BEACON_SERVICE[UUID::LENGTH_OF_LONG_UUID];
-extern const uint8_t UUID_LOCK_STATE_CHAR[UUID::LENGTH_OF_LONG_UUID];
-extern const uint8_t UUID_LOCK_CHAR[UUID::LENGTH_OF_LONG_UUID];
-extern const uint8_t UUID_UNLOCK_CHAR[UUID::LENGTH_OF_LONG_UUID];
-extern const uint8_t UUID_URI_DATA_CHAR[UUID::LENGTH_OF_LONG_UUID];
-extern const uint8_t UUID_FLAGS_CHAR[UUID::LENGTH_OF_LONG_UUID];
-extern const uint8_t UUID_ADV_POWER_LEVELS_CHAR[UUID::LENGTH_OF_LONG_UUID];
-extern const uint8_t UUID_TX_POWER_MODE_CHAR[UUID::LENGTH_OF_LONG_UUID];
-extern const uint8_t UUID_BEACON_PERIOD_CHAR[UUID::LENGTH_OF_LONG_UUID];
-extern const uint8_t UUID_RESET_CHAR[UUID::LENGTH_OF_LONG_UUID];
-
-extern const uint8_t BEACON_UUID[sizeof(UUID::ShortUUIDBytes_t)];
-
-/**
-* @class URIBeaconConfigService
-* @brief UriBeacon Configuration Service. Can be used to set URL, adjust power levels, and set flags.
-* See http://uribeacon.org
-*
-*/
-class URIBeaconConfigService {
- public:
- /**
- * @brief Transmission Power Modes for UriBeacon
- */
- static const uint8_t TX_POWER_MODE_LOWEST = 0; /*!< Lowest TX power mode */
- static const uint8_t TX_POWER_MODE_LOW = 1; /*!< Low TX power mode */
- static const uint8_t TX_POWER_MODE_MEDIUM = 2; /*!< Medium TX power mode */
- static const uint8_t TX_POWER_MODE_HIGH = 3; /*!< High TX power mode */
- static const unsigned NUM_POWER_MODES = 4; /*!< Number of Power Modes defined */
-
- static const int ADVERTISING_INTERVAL_MSEC = 1000; // Advertising interval for config service.
- static const int SERVICE_DATA_MAX = 31; // Maximum size of service data in ADV packets
-
- typedef uint8_t Lock_t[16]; /* 128 bits */
- typedef int8_t PowerLevels_t[NUM_POWER_MODES];
-
- static const int URI_DATA_MAX = 18;
- typedef uint8_t UriData_t[URI_DATA_MAX];
-
- struct Params_t {
- Lock_t lock;
- uint8_t uriDataLength;
- UriData_t uriData;
- uint8_t flags;
- PowerLevels_t advPowerLevels; // Current value of AdvertisedPowerLevels
- uint8_t txPowerMode; // Firmware power levels used with setTxPower()
- uint16_t beaconPeriod;
- };
-
- /**
- * @param[ref] ble
- * BLEDevice object for the underlying controller.
- * @param[in/out] paramsIn
- * Reference to application-visible beacon state, loaded
- * from persistent storage at startup.
- * @paramsP[in] resetToDefaultsFlag
- * Applies to the state of the 'paramsIn' parameter.
- * If true, it indicates that paramsIn is potentially
- * un-initialized, and default values should be used
- * instead. Otherwise, paramsIn overrides the defaults.
- * @param[in] defaultUriDataIn
- * Default un-encoded URI; applies only if the resetToDefaultsFlag is true.
- * @param[in] defaultAdvPowerLevelsIn
- * Default power-levels array; applies only if the resetToDefaultsFlag is true.
- */
- URIBeaconConfigService(BLEDevice &bleIn,
- Params_t ¶msIn,
- bool resetToDefaultsFlag,
- const char *defaultURIDataIn,
- PowerLevels_t &defaultAdvPowerLevelsIn) :
- ble(bleIn),
- params(paramsIn),
- defaultUriDataLength(),
- defaultUriData(),
- defaultAdvPowerLevels(defaultAdvPowerLevelsIn),
- initSucceeded(false),
- resetFlag(),
- lockedStateChar(UUID_LOCK_STATE_CHAR, &lockedState),
- lockChar(UUID_LOCK_CHAR, ¶ms.lock),
- uriDataChar(UUID_URI_DATA_CHAR, params.uriData, 0, URI_DATA_MAX,
- GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_READ | GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_WRITE),
- unlockChar(UUID_UNLOCK_CHAR, ¶ms.lock),
- flagsChar(UUID_FLAGS_CHAR, ¶ms.flags),
- advPowerLevelsChar(UUID_ADV_POWER_LEVELS_CHAR, ¶ms.advPowerLevels),
- txPowerModeChar(UUID_TX_POWER_MODE_CHAR, ¶ms.txPowerMode),
- beaconPeriodChar(UUID_BEACON_PERIOD_CHAR, ¶ms.beaconPeriod),
- resetChar(UUID_RESET_CHAR, &resetFlag) {
-
- encodeURI(defaultURIDataIn, defaultUriData, defaultUriDataLength);
- if (defaultUriDataLength > URI_DATA_MAX) {
- return;
- }
-
- if (!resetToDefaultsFlag && (params.uriDataLength > URI_DATA_MAX)) {
- resetToDefaultsFlag = true;
- }
- if (resetToDefaultsFlag) {
- resetToDefaults();
- } else {
- updateCharacteristicValues();
- }
-
- lockedState = isLocked();
-
- lockChar.setWriteAuthorizationCallback(this, &URIBeaconConfigService::lockAuthorizationCallback);
- unlockChar.setWriteAuthorizationCallback(this, &URIBeaconConfigService::unlockAuthorizationCallback);
- uriDataChar.setWriteAuthorizationCallback(this, &URIBeaconConfigService::uriDataWriteAuthorizationCallback);
- flagsChar.setWriteAuthorizationCallback(this, &URIBeaconConfigService::basicAuthorizationCallback<uint8_t>);
- advPowerLevelsChar.setWriteAuthorizationCallback(this, &URIBeaconConfigService::basicAuthorizationCallback<PowerLevels_t>);
- txPowerModeChar.setWriteAuthorizationCallback(this, &URIBeaconConfigService::powerModeAuthorizationCallback);
- beaconPeriodChar.setWriteAuthorizationCallback(this, &URIBeaconConfigService::basicAuthorizationCallback<uint16_t>);
- resetChar.setWriteAuthorizationCallback(this, &URIBeaconConfigService::basicAuthorizationCallback<uint8_t>);
-
- static GattCharacteristic *charTable[] = {
- &lockedStateChar, &lockChar, &unlockChar, &uriDataChar,
- &flagsChar, &advPowerLevelsChar, &txPowerModeChar, &beaconPeriodChar, &resetChar
- };
-
- GattService configService(UUID_URI_BEACON_SERVICE, charTable, sizeof(charTable) / sizeof(GattCharacteristic *));
-
- ble.addService(configService);
- ble.onDataWritten(this, &URIBeaconConfigService::onDataWrittenCallback);
-
- setupURIBeaconConfigAdvertisements(); /* Setup advertising for the configService. */
-
- initSucceeded = true;
- }
-
- bool configuredSuccessfully(void) const {
- return initSucceeded;
- }
-
- /* Start out by advertising the configService for a limited time after
- * startup; and switch to the normal non-connectible beacon functionality
- * afterwards. */
- void setupURIBeaconConfigAdvertisements()
- {
- const char DEVICE_NAME[] = "mUriBeacon Config";
-
- ble.clearAdvertisingPayload();
-
- ble.accumulateAdvertisingPayload(GapAdvertisingData::BREDR_NOT_SUPPORTED | GapAdvertisingData::LE_GENERAL_DISCOVERABLE);
-
- // UUID is in different order in the ADV frame (!)
- uint8_t reversedServiceUUID[sizeof(UUID_URI_BEACON_SERVICE)];
- for (unsigned int i = 0; i < sizeof(UUID_URI_BEACON_SERVICE); i++) {
- reversedServiceUUID[i] = UUID_URI_BEACON_SERVICE[sizeof(UUID_URI_BEACON_SERVICE) - i - 1];
- }
- ble.accumulateAdvertisingPayload(GapAdvertisingData::COMPLETE_LIST_128BIT_SERVICE_IDS, reversedServiceUUID, sizeof(reversedServiceUUID));
- ble.accumulateAdvertisingPayload(GapAdvertisingData::GENERIC_TAG);
- ble.accumulateScanResponse(GapAdvertisingData::COMPLETE_LOCAL_NAME, reinterpret_cast<const uint8_t *>(&DEVICE_NAME), sizeof(DEVICE_NAME));
- ble.accumulateScanResponse(GapAdvertisingData::TX_POWER_LEVEL,
- reinterpret_cast<uint8_t *>(&defaultAdvPowerLevels[URIBeaconConfigService::TX_POWER_MODE_LOW]),
- sizeof(uint8_t));
-
- ble.setTxPower(params.advPowerLevels[params.txPowerMode]);
- ble.setDeviceName(reinterpret_cast<const uint8_t *>(&DEVICE_NAME));
- ble.setAdvertisingType(GapAdvertisingParams::ADV_CONNECTABLE_UNDIRECTED);
- ble.setAdvertisingInterval(Gap::MSEC_TO_ADVERTISEMENT_DURATION_UNITS(ADVERTISING_INTERVAL_MSEC));
- }
-
- /* Helper function to switch to the non-connectible normal mode for URIBeacon. This gets called after a timeout. */
- void setupURIBeaconAdvertisements()
- {
- uint8_t serviceData[SERVICE_DATA_MAX];
- unsigned serviceDataLen = 0;
-
- /* Reinitialize the BLE stack. This will clear away the existing services and advertising state. */
- ble.shutdown();
- ble.init();
-
- // Fields from the Service
- unsigned beaconPeriod = params.beaconPeriod;
- unsigned txPowerMode = params.txPowerMode;
- unsigned uriDataLength = params.uriDataLength;
- URIBeaconConfigService::UriData_t &uriData = params.uriData;
- URIBeaconConfigService::PowerLevels_t &advPowerLevels = params.advPowerLevels;
- uint8_t flags = params.flags;
-
- extern void saveURIBeaconConfigParams(const Params_t *paramsP); /* forward declaration; necessary to avoid a circular dependency. */
- saveURIBeaconConfigParams(¶ms);
-
- ble.clearAdvertisingPayload();
- ble.setTxPower(params.advPowerLevels[params.txPowerMode]);
- ble.setAdvertisingType(GapAdvertisingParams::ADV_NON_CONNECTABLE_UNDIRECTED);
- ble.setAdvertisingInterval(beaconPeriod);
- ble.accumulateAdvertisingPayload(GapAdvertisingData::BREDR_NOT_SUPPORTED | GapAdvertisingData::LE_GENERAL_DISCOVERABLE);
- ble.accumulateAdvertisingPayload(GapAdvertisingData::COMPLETE_LIST_16BIT_SERVICE_IDS, BEACON_UUID, sizeof(BEACON_UUID));
-
- serviceData[serviceDataLen++] = BEACON_UUID[0];
- serviceData[serviceDataLen++] = BEACON_UUID[1];
- serviceData[serviceDataLen++] = flags;
- serviceData[serviceDataLen++] = advPowerLevels[txPowerMode];
- for (unsigned j = 0; j < uriDataLength; j++) {
- serviceData[serviceDataLen++] = uriData[j];
- }
- ble.accumulateAdvertisingPayload(GapAdvertisingData::SERVICE_DATA, serviceData, serviceDataLen);
- }
-
- private:
- // True if the lock bits are non-zero
- bool isLocked() {
- Lock_t testLock;
- memset(testLock, 0, sizeof(Lock_t));
- return memcmp(params.lock, testLock, sizeof(Lock_t));
- }
-
- /*
- * This callback is invoked when a GATT client attempts to modify any of the
- * characteristics of this service. Attempts to do so are also applied to
- * the internal state of this service object.
- */
- void onDataWrittenCallback(const GattCharacteristicWriteCBParams *writeParams) {
- uint16_t handle = writeParams->charHandle;
-
- if (handle == lockChar.getValueHandle()) {
- // Validated earlier
- memcpy(params.lock, writeParams->data, sizeof(Lock_t));
- // use isLocked() in case bits are being set to all 0's
- lockedState = isLocked();
- } else if (handle == unlockChar.getValueHandle()) {
- // Validated earlier
- memset(params.lock, 0, sizeof(Lock_t));
- lockedState = false;
- } else if (handle == uriDataChar.getValueHandle()) {
- params.uriDataLength = writeParams->len;
- memcpy(params.uriData, writeParams->data, params.uriDataLength);
- } else if (handle == flagsChar.getValueHandle()) {
- params.flags = *(writeParams->data);
- } else if (handle == advPowerLevelsChar.getValueHandle()) {
- memcpy(params.advPowerLevels, writeParams->data, sizeof(PowerLevels_t));
- } else if (handle == txPowerModeChar.getValueHandle()) {
- params.txPowerMode = *(writeParams->data);
- } else if (handle == beaconPeriodChar.getValueHandle()) {
- params.beaconPeriod = *((uint16_t *)(writeParams->data));
-
- /* Re-map beaconPeriod to within permissible bounds if necessary. */
- if (params.beaconPeriod != 0) {
- bool paramsUpdated = false;
- if (params.beaconPeriod < ble.getMinAdvertisingInterval()) {
- params.beaconPeriod = ble.getMinAdvertisingInterval();
- paramsUpdated = true;
- } else if (params.beaconPeriod > ble.getMaxAdvertisingInterval()) {
- params.beaconPeriod = ble.getMaxAdvertisingInterval();
- paramsUpdated = true;
- }
- if (paramsUpdated) {
- ble.updateCharacteristicValue(beaconPeriodChar.getValueHandle(), reinterpret_cast<uint8_t *>(¶ms.beaconPeriod), sizeof(uint16_t));
- }
- }
- } else if (handle == resetChar.getValueHandle()) {
- resetToDefaults();
- }
- }
-
- /*
- * Reset the default values.
- */
- void resetToDefaults(void) {
- lockedState = false;
- memset(params.lock, 0, sizeof(Lock_t));
- memcpy(params.uriData, defaultUriData, URI_DATA_MAX);
- params.uriDataLength = defaultUriDataLength;
- params.flags = 0;
- memcpy(params.advPowerLevels, defaultAdvPowerLevels, sizeof(PowerLevels_t));
- params.txPowerMode = TX_POWER_MODE_LOW;
- params.beaconPeriod = 1000;
- updateCharacteristicValues();
- }
-
- /*
- * Internal helper function used to update the GATT database following any
- * change to the internal state of the service object.
- */
- void updateCharacteristicValues(void) {
- ble.updateCharacteristicValue(lockedStateChar.getValueHandle(), &lockedState, 1);
- ble.updateCharacteristicValue(uriDataChar.getValueHandle(), params.uriData, params.uriDataLength);
- ble.updateCharacteristicValue(flagsChar.getValueHandle(), ¶ms.flags, 1);
- ble.updateCharacteristicValue(beaconPeriodChar.getValueHandle(),
- reinterpret_cast<uint8_t *>(¶ms.beaconPeriod), sizeof(uint16_t));
- ble.updateCharacteristicValue(txPowerModeChar.getValueHandle(), ¶ms.txPowerMode, 1);
- ble.updateCharacteristicValue(advPowerLevelsChar.getValueHandle(),
- reinterpret_cast<uint8_t *>(params.advPowerLevels), sizeof(PowerLevels_t));
- }
-
- private:
- void lockAuthorizationCallback(GattCharacteristicWriteAuthCBParams *authParams) {
- if (lockedState) {
- authParams->authorizationReply = AUTH_CALLBACK_REPLY_ATTERR_INSUF_AUTHORIZATION;
- } else if (authParams->len != sizeof(Lock_t)) {
- authParams->authorizationReply = AUTH_CALLBACK_REPLY_ATTERR_INVALID_ATT_VAL_LENGTH;
- } else if (authParams->offset != 0) {
- authParams->authorizationReply = AUTH_CALLBACK_REPLY_ATTERR_INVALID_OFFSET;
- } else {
- authParams->authorizationReply = AUTH_CALLBACK_REPLY_SUCCESS;
- }
- }
-
-
- void unlockAuthorizationCallback(GattCharacteristicWriteAuthCBParams *authParams) {
- if (!lockedState) {
- authParams->authorizationReply = AUTH_CALLBACK_REPLY_SUCCESS;
- } else if (authParams->len != sizeof(Lock_t)) {
- authParams->authorizationReply = AUTH_CALLBACK_REPLY_ATTERR_INVALID_ATT_VAL_LENGTH;
- } else if (authParams->offset != 0) {
- authParams->authorizationReply = AUTH_CALLBACK_REPLY_ATTERR_INVALID_OFFSET;
- } else if (memcmp(authParams->data, params.lock, sizeof(Lock_t)) != 0) {
- authParams->authorizationReply = AUTH_CALLBACK_REPLY_ATTERR_INSUF_AUTHORIZATION;
- } else {
- authParams->authorizationReply = AUTH_CALLBACK_REPLY_SUCCESS;
- }
- }
-
- void uriDataWriteAuthorizationCallback(GattCharacteristicWriteAuthCBParams *authParams) {
- if (lockedState) {
- authParams->authorizationReply = AUTH_CALLBACK_REPLY_ATTERR_INSUF_AUTHORIZATION;
- } else if (authParams->offset != 0) {
- authParams->authorizationReply = AUTH_CALLBACK_REPLY_ATTERR_INVALID_OFFSET;
- } else {
- authParams->authorizationReply = AUTH_CALLBACK_REPLY_SUCCESS;
- }
- }
-
- void powerModeAuthorizationCallback(GattCharacteristicWriteAuthCBParams *authParams) {
- if (lockedState) {
- authParams->authorizationReply = AUTH_CALLBACK_REPLY_ATTERR_INSUF_AUTHORIZATION;
- } else if (authParams->len != sizeof(uint8_t)) {
- authParams->authorizationReply = AUTH_CALLBACK_REPLY_ATTERR_INVALID_ATT_VAL_LENGTH;
- } else if (authParams->offset != 0) {
- authParams->authorizationReply = AUTH_CALLBACK_REPLY_ATTERR_INVALID_OFFSET;
- } else if (*((uint8_t *)authParams->data) >= NUM_POWER_MODES) {
- authParams->authorizationReply = AUTH_CALLBACK_REPLY_ATTERR_WRITE_NOT_PERMITTED;
- } else {
- authParams->authorizationReply = AUTH_CALLBACK_REPLY_SUCCESS;
- }
- }
-
- template <typename T>
- void basicAuthorizationCallback(GattCharacteristicWriteAuthCBParams *authParams) {
- if (lockedState) {
- authParams->authorizationReply = AUTH_CALLBACK_REPLY_ATTERR_INSUF_AUTHORIZATION;
- } else if (authParams->len != sizeof(T)) {
- authParams->authorizationReply = AUTH_CALLBACK_REPLY_ATTERR_INVALID_ATT_VAL_LENGTH;
- } else if (authParams->offset != 0) {
- authParams->authorizationReply = AUTH_CALLBACK_REPLY_ATTERR_INVALID_OFFSET;
- } else {
- authParams->authorizationReply = AUTH_CALLBACK_REPLY_SUCCESS;
- }
- }
-
- BLEDevice &ble;
- Params_t ¶ms;
-
- size_t defaultUriDataLength; // Default value that is restored on reset
- UriData_t defaultUriData; // Default value that is restored on reset
- PowerLevels_t &defaultAdvPowerLevels; // Default value that is restored on reset
-
- uint8_t lockedState;
- bool initSucceeded;
- uint8_t resetFlag;
-
- ReadOnlyGattCharacteristic<uint8_t> lockedStateChar;
- WriteOnlyGattCharacteristic<Lock_t> lockChar;
- GattCharacteristic uriDataChar;
- WriteOnlyGattCharacteristic<Lock_t> unlockChar;
- ReadWriteGattCharacteristic<uint8_t> flagsChar;
- ReadWriteGattCharacteristic<PowerLevels_t> advPowerLevelsChar;
- ReadWriteGattCharacteristic<uint8_t> txPowerModeChar;
- ReadWriteGattCharacteristic<uint16_t> beaconPeriodChar;
- WriteOnlyGattCharacteristic<uint8_t> resetChar;
-
- public:
- /*
- * Encode a human-readable URI into the binary format defined by URIBeacon spec (https://github.com/google/uribeacon/tree/master/specification).
- */
- static void encodeURI(const char *uriDataIn, UriData_t uriDataOut, size_t &sizeofURIDataOut) {
- const char *prefixes[] = {
- "http://www.",
- "https://www.",
- "http://",
- "https://",
- "urn:uuid:"
- };
- const size_t NUM_PREFIXES = sizeof(prefixes) / sizeof(char *);
- const char *suffixes[] = {
- ".com/",
- ".org/",
- ".edu/",
- ".net/",
- ".info/",
- ".biz/",
- ".gov/",
- ".com",
- ".org",
- ".edu",
- ".net",
- ".info",
- ".biz",
- ".gov"
- };
- const size_t NUM_SUFFIXES = sizeof(suffixes) / sizeof(char *);
-
- sizeofURIDataOut = 0;
- memset(uriDataOut, 0, sizeof(UriData_t));
-
- if ((uriDataIn == NULL) || (strlen(uriDataIn) == 0)) {
- return;
- }
-
- /*
- * handle prefix
- */
- for (unsigned i = 0; i < NUM_PREFIXES; i++) {
- size_t prefixLen = strlen(prefixes[i]);
- if (strncmp(uriDataIn, prefixes[i], prefixLen) == 0) {
- uriDataOut[sizeofURIDataOut++] = i;
- uriDataIn += prefixLen;
- break;
- }
- }
-
- /*
- * handle suffixes
- */
- while (*uriDataIn && (sizeofURIDataOut < URI_DATA_MAX)) {
- /* check for suffix match */
- unsigned i;
- for (i = 0; i < NUM_SUFFIXES; i++) {
- size_t suffixLen = strlen(suffixes[i]);
- if (strncmp(uriDataIn, suffixes[i], suffixLen) == 0) {
- uriDataOut[sizeofURIDataOut++] = i;
- uriDataIn += suffixLen;
- break; /* from the for loop for checking against suffixes */
- }
- }
- /* This is the default case where we've got an ordinary character which doesn't match a suffix. */
- if (i == NUM_SUFFIXES) {
- uriDataOut[sizeofURIDataOut++] = *uriDataIn;
- ++uriDataIn;
- }
- }
- }
-};
-
-#endif // SERVICES_URIBEACONCONFIGSERVICE_H_
\ No newline at end of file