/* Copyright (c) 2010 - 2019, Nordic Semiconductor ASA
*
* All rights reserved.
*
* Use in source and binary forms, redistribution in binary form only, with
* or without modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions in binary form, except as embedded into a Nordic
* Semiconductor ASA integrated circuit in a product or a software update for
* such product, must reproduce the above copyright notice, this list of
* conditions and the following disclaimer in the documentation and/or other
* materials provided with the distribution.
*
* 2. Neither the name of Nordic Semiconductor ASA nor the names of its
* contributors may be used to endorse or promote products derived from this
* software without specific prior written permission.
*
* 3. This software, with or without modification, must only be used with a Nordic
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*
* THIS SOFTWARE IS PROVIDED BY NORDIC SEMICONDUCTOR ASA "AS IS" AND ANY EXPRESS OR
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*/
'use strict';
const EventEmitter = require('events');
const _ = require('underscore');
const AdapterState = require('./adapterState');
const Device = require('./device');
const Service = require('./service');
const Characteristic = require('./characteristic');
const Descriptor = require('./descriptor');
const AdType = require('./util/adType');
const Converter = require('./util/sdConv');
const ToText = require('./util/toText');
const logLevel = require('./util/logLevel');
const Security = require('./security');
const HexConv = require('./util/hexConv');
const MAX_SUPPORTED_ATT_MTU = 247;
/** Class to mediate error conditions. */
class Error {
/**
* Create an error object.
*
* @constructor
* @param {string} userMessage The message to display to the user.
* @param {string} description A detailed description of the error.
*/
constructor(userMessage, description) {
this.message = userMessage;
this.description = description;
}
}
const _makeError = function (userMessage, description) {
return new Error(userMessage, description);
};
/**
* Class representing a transport adapter (SoftDevice RPC module).
*
* @fires Adapter#advertiseTimedOut
* @fires Adapter#attMtuChanged
* @fires Adapter#authKeyRequest
* @fires Adapter#authStatus
* @fires Adapter#characteristicAdded
* @fires Adapter#characteristicValueChanged
* @fires Adapter#closed
* @fires Adapter#connectTimedOut
* @fires Adapter#connParamUpdate
* @fires Adapter#connParamUpdateRequest
* @fires Adapter#connSecUpdate
* @fires Adapter#dataLengthChanged
* @fires Adapter#descriptorAdded
* @fires Adapter#descriptorValueChanged
* @fires Adapter#deviceConnected
* @fires Adapter#deviceDisconnected
* @fires Adapter#deviceDiscovered
* @fires Adapter#deviceNotifiedOrIndicated
* @fires Adapter#error
* @fires Adapter#keyPressed
* @fires Adapter#lescDhkeyRequest
* @fires Adapter#logMessage
* @fires Adapter#opened
* @fires Adapter#passkeyDisplay
* @fires Adapter#scanTimedOut
* @fires Adapter#secInfoRequest
* @fires Adapter#secParamsRequest
* @fires Adapter#securityChanged
* @fires Adapter#securityRequest
* @fires Adapter#securityRequestTimedOut
* @fires Adapter#serviceAdded
* @fires Adapter#stateChanged
* @fires Adapter#status
* @fires Adapter#txComplete
* @fires Adapter#warning
*/
class Adapter extends EventEmitter {
/**
* @summary Create an object representing an adapter.
*
* This constructor is called by `AdapterFactory` and it should not be necessary for the developer to call directly.
*
* @constructor
* @param {Object} bleDriver The driver to use for getting constants from the pc-ble-driver-js AddOn.
* @param {Object} adapter The adapter to use. The adapter is an object received from the pc-ble-driver-js AddOn.
* @param {string} instanceId The unique Id that identifies this Adapter instance.
* @param {string} port The port this adapter uses. For example it can be 'COM1', '/dev/ttyUSB0' or similar.
* @param {string} [serialNumber] The serial number of hardware device this adapter is controlling via serial.
* @param {string} [notSupportedMessage] Message displayed to developer if this adapter is not supported on platform.
*
*/
constructor(bleDriver, adapter, instanceId, port, serialNumber, notSupportedMessage) {
super();
if (bleDriver === undefined) throw new Error('Missing argument bleDriver.');
if (adapter === undefined) throw new Error('Missing argument adapter.');
if (instanceId === undefined) throw new Error('Missing argument instanceId.');
if (port === undefined) throw new Error('Missing argument port.');
this._bleDriver = bleDriver;
this._adapter = adapter;
this._instanceId = instanceId;
this._state = new AdapterState(instanceId, port, serialNumber);
this._security = new Security(this._bleDriver);
this._notSupportedMessage = notSupportedMessage;
this._keys = null;
this._attMtuMap = {};
this._init();
}
_init() {
this._devices = {};
this._services = {};
this._characteristics = {};
this._descriptors = {};
this._converter = new Converter(this._bleDriver, this._adapter);
this._gapOperationsMap = {};
this._gattOperationsMap = {};
this._preparedWritesMap = {};
this._pendingNotificationsAndIndications = {};
}
_getServiceType(service) {
let type;
if (service.type) {
if (service.type === 'primary') {
type = this._bleDriver.BLE_GATTS_SRVC_TYPE_PRIMARY;
} else if (service.type === 'secondary') {
type = this._bleDriver.BLE_GATTS_SRVC_TYPE_SECONDARY;
} else {
throw new Error(`Service type ${service.type} is unknown to me. Must be 'primary' or 'secondary'.`);
}
} else {
throw new Error('Service type is not specified. Must be \'primary\' or \'secondary\'.');
}
return type;
}
/**
* Get the instanceId of this adapter.
* @returns {string} Unique Id of this adapter.
*/
get instanceId() {
return this._instanceId;
}
/**
* Get the state of this adapter. @ref: ./adapterState.js
* @returns {AdapterState} `AdapterState` store object of this adapter.
*/
get state() {
return this._state;
}
/**
* Get the driver of this adapter.
* @returns {Object} The pc-ble-driver to use for this adapter, from the pc-ble-driver-js add-on.
*/
get driver() {
return this._bleDriver;
}
/**
* Get the `notSupportedMessage` of this adapter.
* @returns {string} The error message thrown if this adapter is not supported on the platform/hardware.
*/
get notSupportedMessage() {
return this._notSupportedMessage;
}
_maxReadPayloadSize(deviceInstanceId) {
return this.getCurrentAttMtu(deviceInstanceId) - 1;
}
_maxShortWritePayloadSize(deviceInstanceId) {
return this.getCurrentAttMtu(deviceInstanceId) - 3;
}
_maxLongWritePayloadSize(deviceInstanceId) {
return this.getCurrentAttMtu(deviceInstanceId) - 5;
}
_generateKeyPair() {
if (this._keys === null) {
this._keys = this._security.generateKeyPair();
}
}
/**
* Compute shared secret.
*
* @param {string} [peerPublicKey] Peer public key.
* @returns {string} The computed shared secret generated from this adapter's key-pair.
*/
computeSharedSecret(peerPublicKey) {
this._generateKeyPair();
let publicKey = peerPublicKey;
if (publicKey === null || publicKey === undefined) {
publicKey = this._keys;
}
return this._security.generateSharedSecret(this._keys.sk, publicKey.pk).ss;
}
/**
* Compute public key.
*
* @returns {string} The public key generated from this adapter's key-pair.
*/
computePublicKey() {
this._generateKeyPair();
return this._security.generatePublicKey(this._keys.sk).pk;
}
/**
* Deletes any previously generated key-pair.
*
* The next time `computeSharedSecret` or `computePublicKey` is invoked, a new key-pair will be generated and used.
* @returns {void}
*/
deleteKeys() {
this._keys = null;
}
_checkAndPropagateError(err, userMessage, callback) {
if (err) {
this._emitError(err, userMessage);
if (callback) callback(err);
return true;
}
return false;
}
_emitError(err, userMessage) {
const error = new Error(userMessage, err);
/**
* Error event.
*
* @event Adapter#error
* @type {Object}
* @property {Error} error - Provides information related to an error that occurred.
*/
this.emit('error', error);
}
_changeState(changingStates, swallowEmit) {
let changed = false;
for (const state in changingStates) {
const newValue = changingStates[state];
const previousValue = this._state[state];
// Use isEqual to compare objects
if (!_.isEqual(previousValue, newValue)) {
this._state[state] = newValue;
changed = true;
}
}
if (swallowEmit) {
return;
}
if (changed) {
/**
* Adapter state changed event.
*
* @event Adapter#stateChanged
* @type {Object}
* @property {AdapterState} this._state - The updated adapter's state store.
*/
this.emit('stateChanged', this._state);
}
}
_getDefaultEnableBLEParams() {
if (this._bleDriver.NRF_SD_BLE_API_VERSION === 2) {
return {
gap_enable_params: {
periph_conn_count: 1,
central_conn_count: 7,
central_sec_count: 1,
},
gatts_enable_params: {
service_changed: false,
attr_tab_size: this._bleDriver.BLE_GATTS_ATTR_TAB_SIZE_DEFAULT,
},
common_enable_params: {
conn_bw_counts: null, // tell SD to use default
vs_uuid_count: 10,
},
gatt_enable_params: {
att_mtu: MAX_SUPPORTED_ATT_MTU,
},
};
}
return {
conn_cfg: {
gap_conn_cfg: {
conn_count: 8,
// event_length,
},
gatt_conn_cfg: {
att_mtu: MAX_SUPPORTED_ATT_MTU,
},
// gattc_conn_cfg: {
// write_cmd_tx_queue_size,
// },
// gatts_conn_cfg: {
// hvn_tx_queue_size,
// },
// l2cap_conn_cfg: {
// rx_mps,
// tx_mps,
// rx_queue_size,
// tx_queue_size,
// ch_count,
// },
},
common_cfg: {
vs_uuid_cfg: {
vs_uuid_count: 10,
},
},
gap_cfg: {
role_count_cfg: {
periph_role_count: 1,
central_role_count: 7,
central_sec_count: 1,
},
},
gatts_cfg: {
service_changed: {
service_changed: false,
},
attr_tab_size: {
attr_tab_size: this._bleDriver.BLE_GATTS_ATTR_TAB_SIZE_DEFAULT,
},
},
};
}
/**
* @summary Initialize the adapter.
*
* The serial port will be attempted to be opened with the configured serial port settings in
* adapterOptions.
*
* @param {Object} options Options to initialize/open this adapter with.
* Available adapter open options:
*
* - {number} [baudRate=1000000]: The baud rate this adapter's serial port should be configured with.
*
- {string} [parity='none']: The parity this adapter's serial port should be configured with.
*
- {string} [flowControl='none']: Whether flow control should be configured with this adapter's serial port.
*
- {number} [eventInterval=0]: Interval to use for sending BLE driver events to JavaScript.
* If `0`, events will be sent as soon as they are received from the BLE driver.
*
- {string} [logLevel='info']: The verbosity of logging the developer wants with this adapter.
*
- {number} [retransmissionInterval=250]: The time interval to wait between retransmitted packets.
*
- {number} [responseTimeout=1500]: Response timeout of the data link layer.
*
- {boolean} [enableBLE=true]: Whether the BLE stack should be initialized and enabled.
*
* @param {function(Error)} [callback] Callback signature: err => {}.
* @returns {void}
*/
open(options, callback) {
if (this.state.opening || this.state.available) {
callback(_makeError('Adapter is already open.'));
return;
}
if (this.notSupportedMessage !== undefined) {
const error = new Error(this.notSupportedMessage);
/**
* Warning event.
*
* @event Adapter#warning
* @type {Object}
* @property {Error} error - A non fatal Error.
*/
this.emit('warning', error);
}
if (!options) {
options = {
baudRate: 1000000,
parity: 'none',
flowControl: 'none',
eventInterval: 0,
logLevel: 'info',
retransmissionInterval: 250,
responseTimeout: 1500,
enableBLE: true,
};
} else {
if (!options.baudRate) options.baudRate = 1000000;
if (!options.parity) options.parity = 'none';
if (!options.flowControl) options.flowControl = 'none';
if (!options.eventInterval) options.eventInterval = 0;
if (!options.logLevel) options.logLevel = 'info';
if (!options.retransmissionInterval) options.retransmissionInterval = 250;
if (!options.responseTimeout) options.responseTimeout = 1500;
if (options.enableBLE === undefined) options.enableBLE = true;
}
this._changeState({
opening: true,
baudRate: options.baudRate,
parity: options.parity,
flowControl: options.flowControl,
});
options.logCallback = this._logCallback.bind(this);
options.eventCallback = this._eventCallback.bind(this);
options.statusCallback = this._statusCallback.bind(this);
options.enableBLEParams = options.enableBLEParams || this._getDefaultEnableBLEParams();
this._adapter.open(this._state.port, options, err => {
this._changeState({ opening: false });
if (this._checkAndPropagateError(err, 'Error occurred opening serial port.', callback)) { return; }
this._changeState({ available: true });
/**
* Adapter opened event.
*
* @event Adapter#opened
* @type {Object}
* @property {Adapter} this - An instance of the opened Adapter.
*/
this.emit('opened', this);
if (options.enableBLE) {
this._changeState({ bleEnabled: true });
this.getState(getStateError => {
this._checkAndPropagateError(getStateError, 'Error retrieving adapter state.', callback);
});
}
if (callback) { callback(); }
});
}
/**
* @summary Close the adapter.
*
* This function will close the serial port, release allocated resources and remove event listeners.
* Before closing, a reset command is issued to set the connectivity device to idle state.
*
* @param {function(Error)} [callback] Callback signature: err => {}.
* @returns {void}
*/
close(callback) {
if (!this._state.available) {
if (callback) callback();
return;
}
this.connReset(err => {
if (err) {
this.emit('logMessage', logLevel.DEBUG, `Failed to issue connectivity reset: ${err.message}. Proceeding with close.`);
}
this._changeState({
available: false,
bleEnabled: false,
});
this._adapter.close(error => {
/**
* Adapter closed event.
*
* @event Adapter#closed
* @type {Object}
* @property {Adapter} this - An instance of the closed Adapter.
*/
this.emit('closed', this);
if (callback) callback(error);
});
});
}
/**
* @summary Reset the connectivity device
*
* This function will issue a reset command to the connectivity device.
*
* @param {function(Error)} [callback] Callback signature: err => {}.
* @returns {void}
*/
connReset(callback) {
if (!this.state.available) {
if (callback) callback(_makeError('The adapter is not available.'));
return;
}
this._adapter.connReset(error => {
if (callback) callback(error);
});
}
/**
* This function is for debugging purposes. It will return an object with these members:
*
* - {number} eventCallbackTotalTime
*
- {number} eventCallbackTotalCount
*
- {number} eventCallbackBatchMaxCount
*
- {number} eventCallbackBatchAvgCount
*
*
* @returns {Object} This adapters stats.
*/
getStats() {
return this._adapter.getStats();
}
/**
* @summary Enable the BLE stack.
*
* This call initializes the BLE stack, no other BLE related function can be called before this one.
*
* @param {Object} [options] BLE Initialization parameters. If `undefined` or `null` the BLE stack will be
* initialized with default options (see code for `enableBLE()` below for default values).
* Available BLE enable parameters:
*
* - {Object} gap_enable_params: GAP init parameters
*
* - {number} periph_conn_count: Number of connections acting as a peripheral.
*
- {number} central_conn_count: Number of connections acting as a central.
*
- {number} central_sec_count: Number of SMP instances for all connections acting as a central.
*
* - {Object} gatts_enable_params: GATTS init parameters
*
* - {boolean} service_changed: Include the Service Changed characteristic in the Attribute Table.
*
- {number} attr_tab_size: Attribute Table size in bytes. The size must be a multiple of 4.
*
* - {Object} common_enable_params: Common init parameters
*
* - {null|number} conn_bw_counts: Bandwidth configuration parameters or null for defaults.
*
- {number} vs_uuid_count: Maximum number of 128-bit, Vendor Specific UUID bases to allocate.
*
* - {Object} gatt_enable_params: GATT init parameters
*
* - {number} att_mtu: Maximum size of ATT packet the SoftDevice can send or receive.
* If it is 0 then @ref GATT_MTU_SIZE_DEFAULT will be used.
* Otherwise @ref GATT_MTU_SIZE_DEFAULT is the minimum value.
*
*
* @param {function(Error)} [callback] Callback signature: (err) => {}
* @returns {void}
*/
enableBLE(options, callback) {
if (options === undefined || options === null) {
options = this._getDefaultEnableBLEParams();
}
this._adapter.enableBLE(
options,
err => {
if (this._checkAndPropagateError(err, 'Enabling BLE failed.', callback)) { return; }
this._changeState({ bleEnabled: true });
if (callback) {
callback();
}
});
}
setBleConfig(ble_cfg, callback) {
const { conn_cfg, common_cfg, gap_cfg, gatts_cfg } = ble_cfg;
(async () => {
const setOneCfg = (configId, cfg) => new Promise((resolve, reject) => {
this._adapter.setBleConfig(this._bleDriver[configId], cfg, err => (
this._checkAndPropagateError(err, `Set BLE config ${configId} failed.`, reject) || resolve()
));
});
if (conn_cfg !== undefined) {
const { gap_conn_cfg, gattc_conn_cfg, gatts_conn_cfg, gatt_conn_cfg, l2cap_conn_cfg } = conn_cfg;
if (gap_conn_cfg !== undefined) {
await setOneCfg('BLE_CONN_CFG_GAP', { conn_cfg: { gap_conn_cfg } });
}
if (gattc_conn_cfg !== undefined) {
await setOneCfg('BLE_CONN_CFG_GATTC', { conn_cfg: { gattc_conn_cfg } });
}
if (gatts_conn_cfg !== undefined) {
await setOneCfg('BLE_CONN_CFG_GATTS', { conn_cfg: { gatts_conn_cfg } });
}
if (gatt_conn_cfg !== undefined) {
await setOneCfg('BLE_CONN_CFG_GATT', { conn_cfg: { gatt_conn_cfg } });
}
if (l2cap_conn_cfg !== undefined) {
await setOneCfg('BLE_CONN_CFG_L2CAP', { conn_cfg: { l2cap_conn_cfg } });
}
}
if (common_cfg !== undefined) {
const { vs_uuid_cfg } = common_cfg;
if (vs_uuid_cfg) {
await setOneCfg('BLE_COMMON_CFG_VS_UUID', { common_cfg: { vs_uuid_cfg } });
}
}
if (gap_cfg !== undefined) {
const { role_count_cfg, device_name } = gap_cfg;
if (role_count_cfg !== undefined) {
await setOneCfg('BLE_GAP_CFG_ROLE_COUNT', { gap_cfg: { role_count_cfg } });
}
if (device_name !== undefined) {
await setOneCfg('BLE_GAP_CFG_DEVICE_NAME', { gap_cfg: { device_name } });
}
}
if (gatts_cfg !== undefined) {
const { service_changed, attr_tab_size } = gatts_cfg;
if (service_changed !== undefined) {
await setOneCfg('BLE_GATTS_CFG_SERVICE_CHANGED', { gatts_cfg: { service_changed } });
}
if (attr_tab_size !== undefined) {
await setOneCfg('BLE_GATTS_CFG_ATTR_TAB_SIZE', { gatts_cfg: { attr_tab_size } });
}
}
})().then(callback);
}
_statusCallback(status) {
switch (status.id) {
case this._bleDriver.RESET_PERFORMED:
this._init();
this._changeState(
{
available: false,
bleEnabled: false,
connecting: false,
scanning: false,
advertising: false,
}
);
break;
case this._bleDriver.CONNECTION_ACTIVE:
this._changeState(
{
available: true,
}
);
break;
}
/**
* Status event.
*
* @event Adapter#status
* @type {Object}
* @property {string} status - Human-readable status message.
*/
this.emit('status', status);
}
_logCallback(severity, message) {
/**
* Log message event.
*
* @event Adapter#logMessage
* @type {Object}
* @property {string} severity - Severity of the log event.
* @property {string} message - Human-readable log message.
*/
this.emit('logMessage', severity, message);
}
_eventCallback(eventArray) {
eventArray.forEach(event => {
const text = new ToText(event);
// TODO: set the correct level for different types of events:
this.emit('logMessage', logLevel.DEBUG, text.toString());
switch (event.id) {
case this._bleDriver.BLE_GAP_EVT_CONNECTED:
this._parseConnectedEvent(event);
break;
case this._bleDriver.BLE_GAP_EVT_DISCONNECTED:
this._parseDisconnectedEvent(event);
break;
case this._bleDriver.BLE_GAP_EVT_CONN_PARAM_UPDATE:
this._parseConnectionParameterUpdateEvent(event);
break;
case this._bleDriver.BLE_GAP_EVT_SEC_REQUEST:
this._parseGapSecurityRequestEvent(event);
break;
case this._bleDriver.BLE_GAP_EVT_SEC_PARAMS_REQUEST:
this._parseSecParamsRequestEvent(event);
break;
case this._bleDriver.BLE_GAP_EVT_CONN_SEC_UPDATE:
this._parseConnSecUpdateEvent(event);
break;
case this._bleDriver.BLE_GAP_EVT_AUTH_STATUS:
this._parseAuthStatusEvent(event);
break;
case this._bleDriver.BLE_GAP_EVT_PASSKEY_DISPLAY:
this._parsePasskeyDisplayEvent(event);
break;
case this._bleDriver.BLE_GAP_EVT_AUTH_KEY_REQUEST:
this._parseAuthKeyRequest(event);
break;
case this._bleDriver.BLE_GAP_EVT_KEY_PRESSED:
this._parseGapKeyPressedEvent(event);
break;
case this._bleDriver.BLE_GAP_EVT_LESC_DHKEY_REQUEST:
this._parseLescDhkeyRequest(event);
break;
case this._bleDriver.BLE_GAP_EVT_SEC_INFO_REQUEST:
this._parseSecInfoRequest(event);
break;
case this._bleDriver.BLE_GAP_EVT_TIMEOUT:
this._parseGapTimeoutEvent(event);
break;
case this._bleDriver.BLE_GAP_EVT_RSSI_CHANGED:
this._parseGapRssiChangedEvent(event);
break;
case this._bleDriver.BLE_GAP_EVT_ADV_REPORT:
this._parseGapAdvertismentReportEvent(event);
break;
case this._bleDriver.BLE_GAP_EVT_CONN_PARAM_UPDATE_REQUEST:
this._parseGapConnectionParameterUpdateRequestEvent(event);
break;
case this._bleDriver.BLE_GAP_EVT_SCAN_REQ_REPORT:
// Not needed. Received when a scan request is received.
break;
case this._bleDriver.BLE_GAP_EVT_DATA_LENGTH_UPDATE_REQUEST:
this._parseGapDataLengthUpdateRequestEvent(event);
break;
case this._bleDriver.BLE_GAP_EVT_DATA_LENGTH_UPDATE:
this._parseGapDataLengthUpdateEvent(event);
break;
case this._bleDriver.BLE_GAP_EVT_PHY_UPDATE_REQUEST:
this._parseGapPhyUpdateRequestEvent(event);
break;
case this._bleDriver.BLE_GAP_EVT_PHY_UPDATE:
this._parseGapPhyUpdateEvent(event);
break;
case this._bleDriver.BLE_GATTC_EVT_PRIM_SRVC_DISC_RSP:
this._parseGattcPrimaryServiceDiscoveryResponseEvent(event);
break;
case this._bleDriver.BLE_GATTC_EVT_REL_DISC_RSP:
// Not needed. Used for included services discovery.
break;
case this._bleDriver.BLE_GATTC_EVT_CHAR_DISC_RSP:
this._parseGattcCharacteristicDiscoveryResponseEvent(event);
break;
case this._bleDriver.BLE_GATTC_EVT_DESC_DISC_RSP:
this._parseGattcDescriptorDiscoveryResponseEvent(event);
break;
case this._bleDriver.BLE_GATTC_EVT_CHAR_VAL_BY_UUID_READ_RSP:
// Not needed, service discovery is not using the related function.
break;
case this._bleDriver.BLE_GATTC_EVT_READ_RSP:
this._parseGattcReadResponseEvent(event);
break;
case this._bleDriver.BLE_GATTC_EVT_CHAR_VALS_READ_RSP:
// Not needed, characteristic discovery is not using the related function.
break;
case this._bleDriver.BLE_GATTC_EVT_WRITE_RSP:
this._parseGattcWriteResponseEvent(event);
break;
case this._bleDriver.BLE_GATTC_EVT_HVX:
this._parseGattcHvxEvent(event);
break;
case this._bleDriver.BLE_GATTC_EVT_TIMEOUT:
this._parseGattTimeoutEvent(event);
break;
case this._bleDriver.BLE_GATTC_EVT_EXCHANGE_MTU_RSP:
this._parseGattcExchangeMtuResponseEvent(event);
break;
case this._bleDriver.BLE_GATTS_EVT_WRITE:
this._parseGattsWriteEvent(event);
break;
case this._bleDriver.BLE_GATTS_EVT_RW_AUTHORIZE_REQUEST:
this._parseGattsRWAutorizeRequestEvent(event);
break;
case this._bleDriver.BLE_GATTS_EVT_SYS_ATTR_MISSING:
this._parseGattsSysAttrMissingEvent(event);
break;
case this._bleDriver.BLE_GATTS_EVT_HVC:
this._parseGattsHvcEvent(event);
break;
case this._bleDriver.BLE_GATTS_EVT_SC_CONFIRM:
// Not needed, service changed is not supported currently.
break;
case this._bleDriver.BLE_GATTS_EVT_TIMEOUT:
this._parseGattTimeoutEvent(event);
break;
case this._bleDriver.BLE_GATTS_EVT_EXCHANGE_MTU_REQUEST:
this._parseGattsExchangeMtuRequestEvent(event);
break;
case this._bleDriver.BLE_EVT_USER_MEM_REQUEST:
this._parseMemoryRequestEvent(event);
break;
case this._bleDriver.BLE_EVT_TX_COMPLETE:
case this._bleDriver.BLE_GATTC_EVT_WRITE_CMD_TX_COMPLETE:
case this._bleDriver.BLE_GATTS_EVT_HVN_TX_COMPLETE:
this._parseTxCompleteEvent(event);
break;
default:
this.emit('logMessage', logLevel.INFO, `Unsupported event received from SoftDevice: ${event.id} - ${event.name}`);
break;
}
});
}
_parseConnectedEvent(event) {
// TODO: Update device with connection handle
// TODO: Should 'deviceConnected' event emit the updated device?
const deviceAddress = event.peer_addr;
const connectionParameters = event.conn_params;
let deviceRole;
// If our role is central set the device role to be peripheral.
if (event.role === 'BLE_GAP_ROLE_CENTRAL') {
deviceRole = 'peripheral';
} else if (event.role === 'BLE_GAP_ROLE_PERIPH') {
deviceRole = 'central';
}
const device = new Device(deviceAddress, deviceRole);
device.connectionHandle = event.conn_handle;
device.minConnectionInterval = connectionParameters.min_conn_interval;
device.maxConnectionInterval = connectionParameters.max_conn_interval;
device.slaveLatency = connectionParameters.slave_latency;
device.connectionSupervisionTimeout = connectionParameters.conn_sup_timeout;
device.connected = true;
this._devices[device.instanceId] = device;
this._attMtuMap[device.instanceId] = this.driver.GATT_MTU_SIZE_DEFAULT || this.driver.BLE_GATT_ATT_MTU_DEFAULT;
this._changeState({ connecting: false });
if (deviceRole === 'central') {
this._changeState({ advertising: false });
}
/**
* Connection established.
*
* @event Adapter#deviceConnected
* @type {Object}
* @property {Device} device - The Device instance representing the BLE peer we've connected to.
*/
this.emit('deviceConnected', device);
this._addDeviceToAllPerConnectionValues(device.instanceId);
if (deviceRole === 'peripheral') {
const callback = this._gapOperationsMap.connecting.callback;
delete this._gapOperationsMap.connecting;
if (callback) { callback(undefined, device); }
}
}
_parseDisconnectedEvent(event) {
const device = this._getDeviceByConnectionHandle(event.conn_handle);
if (!device) {
this._emitError('Internal inconsistency: Could not find device with connection handle ' + event.conn_handle, 'Disconnect failed');
const errorObject = _makeError('Disconnect failed', 'Internal inconsistency: Could not find device with connection handle ' + event.conn_handle);
// cannot reach callback when there is no device. The best we can do is emit error and return.
this.emit('error', errorObject);
return;
}
device.connected = false;
if (device.instanceId in this._attMtuMap) delete this._attMtuMap[device.instanceId];
// TODO: Delete all operations for this device.
if (this._gapOperationsMap[device.instanceId]) {
// TODO: How do we know what the callback expects? Check disconnected event reason?
const callback = this._gapOperationsMap[device.instanceId].callback;
delete this._gapOperationsMap[device.instanceId];
if (callback) { callback(undefined, device); }
}
if (this._gattOperationsMap[device.instanceId]) {
const callback = this._gattOperationsMap[device.instanceId].callback;
delete this._gattOperationsMap[device.instanceId];
if (callback) {
callback(_makeError('Device disconnected', 'Device with address ' + device.address + ' disconnected'));
}
}
delete this._devices[device.instanceId];
/**
* Disconnected from peer.
*
* @event Adapter#deviceDisconnected
* @type {Object}
* @property {Device} device - The Device instance representing the BLE peer we've disconnected
* from.
* @property {string} event.reason_name - Human-readable reason for disconnection.
* @property {string} event.reason - HCI status code.
*/
this.emit('deviceDisconnected', device, event.reason_name, event.reason);
this._clearDeviceFromAllPerConnectionValues(device.instanceId);
this._clearDeviceFromDiscoveredServices(device.instanceId);
}
_parseConnectionParameterUpdateEvent(event) {
const device = this._getDeviceByConnectionHandle(event.conn_handle);
if (!device) {
this.emit('error', 'Internal inconsistency: Could not find device with connection handle ' + event.conn_handle);
return;
}
device.minConnectionInterval = event.conn_params.min_conn_interval;
device.maxConnectionInterval = event.conn_params.max_conn_interval;
device.slaveLatency = event.conn_params.slave_latency;
device.connectionSupervisionTimeout = event.conn_params.conn_sup_timeout;
if (this._gapOperationsMap[device.instanceId]) {
const callback = this._gapOperationsMap[device.instanceId].callback;
delete this._gapOperationsMap[device.instanceId];
if (callback) { callback(undefined, device); }
}
const connectionParameters = {
minConnectionInterval: event.conn_params.min_conn_interval,
maxConnectionInterval: event.conn_params.max_conn_interval,
slaveLatency: event.conn_params.slave_latency,
connectionSupervisionTimeout: event.conn_params.conn_sup_timeout,
};
/**
* Connection parameter update event.
*
* @event Adapter#connParamUpdate
* @type {Object}
* @property {Device} device - The Device instance representing the BLE peer we're connected to.
* @property {Object} connectionParameters - The updated connection parameters.
*/
this.emit('connParamUpdate', device, connectionParameters);
}
_parseSecParamsRequestEvent(event) {
const device = this._getDeviceByConnectionHandle(event.conn_handle);
/**
* Request to provide security parameters.
*
* @event Adapter#secParamsRequest
* @type {Object}
* @property {Device} device - The Device instance representing the BLE peer we're connected to.
* @property {Object} event.peer_params - Initiator Security Parameters.
*/
this.emit('secParamsRequest', device, event.peer_params);
}
_parseConnSecUpdateEvent(event) {
const device = this._getDeviceByConnectionHandle(event.conn_handle);
/**
* Connection security updated.
*
* @event Adapter#connSecUpdate
* @type {Object}
* @property {Device} device - The Device instance representing the BLE peer we're connected to.
* @property {Object} event.conn_sec - Connection security level.
*/
this.emit('connSecUpdate', device, event.conn_sec);
const authParamters = {
securityMode: event.conn_sec.sec_mode.sm,
securityLevel: event.conn_sec.sec_mode.lv,
};
/**
* Connection security updated.
*
* @event Adapter#securityChanged
* @type {Object}
* @property {Device} device - The Device instance representing the BLE peer we're connected to.
* @property {Object} authParamters - Connection security level.
*/
this.emit('securityChanged', device, authParamters);
}
_parseAuthStatusEvent(event) {
const device = this._getDeviceByConnectionHandle(event.conn_handle);
device.ownPeriphInitiatedPairingPending = false;
/**
* Authentication procedure completed with status.
*
* @event Adapter#authStatus
* @type {Object}
* @property {Device} device - The Device instance representing the BLE peer we're connected to.
* @property {Object} _ - Authentication status and corresponding parameters.
*/
this.emit('authStatus',
device,
{
auth_status: event.auth_status,
auth_status_name: event.auth_status_name,
error_src: event.error_src,
error_src_name: event.error_src_name,
bonded: event.bonded,
sm1_levels: event.sm1_levels,
sm2_levels: event.sm2_levels,
kdist_own: event.kdist_own,
kdist_peer: event.kdist_peer,
keyset: event.keyset,
}
);
}
_parsePasskeyDisplayEvent(event) {
const device = this._getDeviceByConnectionHandle(event.conn_handle);
/**
* Request to display a passkey to the user.
*
* @event Adapter#passkeyDisplay
* @type {Object}
* @property {Device} device - The Device instance representing the BLE peer we're connected to.
* @property {number} event.match_request - If 1 requires the application to report the match using
replyAuthKey.
* @property {string} event.passkey - 6 digit passkey in ASCII ('0'-'9' digits only).
*/
this.emit('passkeyDisplay', device, event.match_request, event.passkey);
}
_parseAuthKeyRequest(event) {
const device = this._getDeviceByConnectionHandle(event.conn_handle);
/**
* Request to provide an authentication key.
*
* @event Adapter#authKeyRequest
* @type {Object}
* @property {Device} device - The Device instance representing the BLE peer we're connected to.
* @property {string} event.key_type - The GAP Authentication Key Types.
*/
this.emit('authKeyRequest', device, event.key_type);
}
_parseGapKeyPressedEvent(event) {
const device = this._getDeviceByConnectionHandle(event.conn_handle);
/**
* Notify of a key press during an authentication procedure.
*
* @event Adapter#keyPressed
* @type {Object}
* @property {Device} device - The Device instance representing the BLE peer we're connected to.
* @property {string} event.kp_not - The Key press notification type.
*/
this.emit('keyPressed', device, event.kp_not);
}
_parseLescDhkeyRequest(event) {
const device = this._getDeviceByConnectionHandle(event.conn_handle);
/**
* Request to calculate an LE Secure Connections DHKey.
*
* @event Adapter#lescDhkeyRequest
* @type {Object}
* @property {Device} device - The Device instance representing the BLE peer we're connected to.
* @property {Object} event.pk_peer - LE Secure Connections remote P-256 Public Key.
* @property {Object} event.oobd_req - LESC OOB data required. A call to replyLescDhkey is
* required to complete the procedure.
*/
this.emit('lescDhkeyRequest', device, event.pk_peer, event.oobd_req);
}
_parseSecInfoRequest(event) {
const device = this._getDeviceByConnectionHandle(event.conn_handle);
/**
* Request to provide security information.
*
* @event Adapter#secInfoRequest
* @type {Object}
* @property {Device} device - The Device instance representing the BLE peer we're connected to.
* @property {Object} event - Security Information Request Event Parameters
*/
this.emit('secInfoRequest', device, event);
}
_parseGapSecurityRequestEvent(event) {
const device = this._getDeviceByConnectionHandle(event.conn_handle);
/**
* Security Request.
*
* @event Adapter#securityRequest
* @type {Object}
* @property {Device} device - The Device instance representing the BLE peer we're connected to.
* @property {Object} event - Security Request Event Parameters.
*/
this.emit('securityRequest', device, event);
}
_parseGapConnectionParameterUpdateRequestEvent(event) {
const device = this._getDeviceByConnectionHandle(event.conn_handle);
const connectionParameters = {
minConnectionInterval: event.conn_params.min_conn_interval,
maxConnectionInterval: event.conn_params.max_conn_interval,
slaveLatency: event.conn_params.slave_latency,
connectionSupervisionTimeout: event.conn_params.conn_sup_timeout,
};
/**
* Connection Parameter Update Request.
*
* @event Adapter#connParamUpdateRequest
* @type {Object}
* @property {Device} device - The Device instance representing the BLE peer we're connected to.
* @property {Object} connectionParameters - GAP Connection Parameters.
*/
this.emit('connParamUpdateRequest', device, connectionParameters);
}
_parseGapDataLengthUpdateRequestEvent(event) {
const device = this._getDeviceByConnectionHandle(event.conn_handle);
/**
* DataLength Update Request.
*
* @event Adapter#dataLengthUpdateRequest
* @type {Object}
* @property {Device} device - The Device instance representing the BLE peer we're connected to.
* @property {Object} event - DataLength Update Request Event Parameters.
*/
this.emit('dataLengthUpdateRequest', device, {
max_rx_octets: event.peer_params.max_tx_octets,
max_tx_octets: event.peer_params.max_rx_octets,
});
}
_parseGapDataLengthUpdateEvent(event) {
const device = this._getDeviceByConnectionHandle(event.conn_handle);
const {
effective_params: {
max_rx_octets: rx,
max_tx_octets: tx,
},
} = event;
device.dataLength = Math.min(rx, tx);
/**
* DataLength Update.
*
* @event Adapter#dataLengthUpdated
* @type {Object}
* @property {Device} device - The Device instance representing the BLE peer we're connected to.
* @property {Object} event - DataLength Update Event Parameters.
*/
this.emit('dataLengthUpdated', device, event);
}
_parseGapPhyUpdateRequestEvent(event) {
const device = this._getDeviceByConnectionHandle(event.conn_handle);
/**
* PHY Update Request.
*
* @event Adapter#phyUpdateRequest
* @type {Object}
* @property {Device} device - The Device instance representing the BLE peer we're connected to.
* @property {Object} event - PHY Update Request Event Parameters.
*/
this.emit('phyUpdateRequest', device, {
tx_phys: event.peer_preferred_phys.rx_phys,
rx_phys: event.peer_preferred_phys.tx_phys,
});
}
_parseGapPhyUpdateEvent(event) {
const device = this._getDeviceByConnectionHandle(event.conn_handle);
device.rxPhy = event.rx_phy;
device.txPhy = event.tx_phy;
/**
* PHY Update.
*
* @event Adapter#phyUpdated
* @type {Object}
* @property {Device} device - The Device instance representing the BLE peer we're connected to.
* @property {Object} event - PHY Update Event Parameters.
*/
this.emit('phyUpdated', device, event);
}
_parseGapAdvertismentReportEvent(event) {
const address = event.peer_addr;
const discoveredDevice = new Device(address, 'peripheral');
discoveredDevice.processEventData(event);
/**
* Discovered a peripheral BLE device.
*
* @event Adapter#deviceDiscovered
* @type {Object}
* @property {Device} discoveredDevice - The Device instance representing the BLE peer we've
* discovered.
*/
this.emit('deviceDiscovered', discoveredDevice);
}
_parseGapTimeoutEvent(event) {
switch (event.src) {
case this._bleDriver.BLE_GAP_TIMEOUT_SRC_ADVERTISING:
this._changeState({ advertising: false });
/**
* BLE peripheral timed out advertising.
*
* @event Adapter#advertiseTimedOut
* @type {Object}
*/
this.emit('advertiseTimedOut');
break;
case this._bleDriver.BLE_GAP_TIMEOUT_SRC_SCAN:
this._changeState({ scanning: false });
/**
* BLE central timed out scanning.
*
* @event Adapter#scanTimedOut
* @type {Object}
*/
this.emit('scanTimedOut');
break;
case this._bleDriver.BLE_GAP_TIMEOUT_SRC_CONN:
const deviceAddress = this._gapOperationsMap.connecting.deviceAddress;
const errorObject = _makeError('Connect timed out.', deviceAddress);
const connectingCallback = this._gapOperationsMap.connecting.callback;
if (connectingCallback) connectingCallback(errorObject);
delete this._gapOperationsMap.connecting;
this._changeState({ connecting: false });
/**
* BLE peer timed out in connection.
*
* @event Adapter#connectTimedOut
* @type {Object}
* @property {Device} deviceAddress - The device address of the BLE peer our connection timed-out with.
*/
this.emit('connectTimedOut', deviceAddress);
break;
case this._bleDriver.BLE_GAP_TIMEOUT_SRC_SECURITY_REQUEST:
const device = this._getDeviceByConnectionHandle(event.conn_handle);
/**
* BLE peer timed out while waiting for a security request response.
*
* @event Adapter#securityRequestTimedOut
* @type {Object}
* @property {Device} device - The Device instance representing the BLE peer we're connected to.
*/
this.emit('securityRequestTimedOut', device);
this.emit('error', _makeError('Security request timed out.'));
break;
default:
this.emit('logMessage', logLevel.DEBUG, `GAP operation timed out: ${event.src_name} (${event.src}).`);
}
}
_parseGapRssiChangedEvent(event) {
const device = this._getDeviceByConnectionHandle(event.conn_handle);
device.rssi = event.rssi;
// TODO: How do we notify the application of a changed rssi?
//emit('rssiChanged', device);
}
_parseGattcPrimaryServiceDiscoveryResponseEvent(event) {
const device = this._getDeviceByConnectionHandle(event.conn_handle);
const services = event.services;
const gattOperation = this._gattOperationsMap[device.instanceId];
const finishServiceDiscovery = () => {
if (_.isEmpty(gattOperation.pendingHandleReads)) {
// No pending reads to wait for.
const callbackServices = [];
for (let serviceInstanceId in this._services) {
const service = this._services[serviceInstanceId];
if (service.deviceInstanceId === gattOperation.parent.instanceId) {
callbackServices.push(this._services[serviceInstanceId]);
}
}
delete this._gattOperationsMap[device.instanceId];
gattOperation.callback(undefined, callbackServices);
} else {
for (let handle in gattOperation.pendingHandleReads) {
// Just take the first found handle and start the read process.
const handleAsNumber = parseInt(handle, 10);
this._adapter.gattcRead(device.connectionHandle, handleAsNumber, 0, err => {
if (err) {
this.emit('error', err);
gattOperation.callback(_makeError('Error reading attributes', err));
}
});
break;
}
}
};
if (event.count === 0) {
finishServiceDiscovery();
return;
}
services.forEach(service => {
const handle = service.handle_range.start_handle;
let uuid = HexConv.numberTo16BitUuid(service.uuid.uuid);
if (service.uuid.type >= this._bleDriver.BLE_UUID_TYPE_VENDOR_BEGIN) {
uuid = this._converter.lookupVsUuid(service.uuid);
} else if (service.uuid.type === this._bleDriver.BLE_UUID_TYPE_UNKNOWN) {
uuid = null;
}
const newService = new Service(device.instanceId, uuid);
newService.startHandle = service.handle_range.start_handle;
newService.endHandle = service.handle_range.end_handle;
this._services[newService.instanceId] = newService;
if (uuid === null) {
gattOperation.pendingHandleReads[handle] = newService;
} else {
/**
* Service was successfully added to the Adapter's GATT attribute table.
*
* @event Adapter#serviceAdded
* @type {Object}
* @property {Service} newService - The new added service.
*/
this.emit('serviceAdded', newService);
}
});
const nextStartHandle = services[services.length - 1].handle_range.end_handle + 1;
if (nextStartHandle > 0xFFFF) {
finishServiceDiscovery();
return;
}
this._adapter.gattcDiscoverPrimaryServices(device.connectionHandle, nextStartHandle, null, err => {
this._checkAndPropagateError(err, 'Failed to get services', gattOperation.callback);
});
}
_parseGattcCharacteristicDiscoveryResponseEvent(event) {
const device = this._getDeviceByConnectionHandle(event.conn_handle);
const characteristics = event.chars;
const gattOperation = this._gattOperationsMap[device.instanceId];
const finishCharacteristicDiscovery = () => {
if (_.isEmpty(gattOperation.pendingHandleReads)) {
// No pending reads to wait for.
const callbackCharacteristics = [];
for (let characteristicInstanceId in this._characteristics) {
const characteristic = this._characteristics[characteristicInstanceId];
if (characteristic.serviceInstanceId === gattOperation.parent.instanceId) {
callbackCharacteristics.push(characteristic);
}
}
delete this._gattOperationsMap[device.instanceId];
gattOperation.callback(undefined, callbackCharacteristics);
} else {
for (let handle in gattOperation.pendingHandleReads) {
// Only take the first found handle and start the read process.
const handleAsNumber = parseInt(handle, 10);
this._adapter.gattcRead(device.connectionHandle, handleAsNumber, 0, err => {
if (this._checkAndPropagateError(err, `Failed to get characteristic with handle ${handleAsNumber}`, gattOperation.callback)) {
return;
}
});
break;
}
}
};
if (event.count === 0) {
finishCharacteristicDiscovery();
return;
}
// We should only receive characteristics under one service.
const service = this._getServiceByHandle(device.instanceId, characteristics[0].handle_decl);
characteristics.forEach(characteristic => {
const declarationHandle = characteristic.handle_decl;
const valueHandle = characteristic.handle_value;
let uuid = HexConv.numberTo16BitUuid(characteristic.uuid.uuid);
if (characteristic.uuid.type >= this._bleDriver.BLE_UUID_TYPE_VENDOR_BEGIN) {
uuid = this._converter.lookupVsUuid(characteristic.uuid);
} else if (characteristic.uuid.type === this._bleDriver.BLE_UUID_TYPE_UNKNOWN) {
uuid = null;
}
const properties = characteristic.char_props;
const newCharacteristic = new Characteristic(service.instanceId, uuid, [], properties);
newCharacteristic.declarationHandle = characteristic.handle_decl;
newCharacteristic.valueHandle = characteristic.handle_value;
this._characteristics[newCharacteristic.instanceId] = newCharacteristic;
if (uuid === null) {
gattOperation.pendingHandleReads[declarationHandle] = newCharacteristic;
}
// Add pending reads to get characteristics values.
if (properties.read) {
gattOperation.pendingHandleReads[valueHandle] = newCharacteristic;
}
});
const nextStartHandle = characteristics[characteristics.length - 1].handle_decl + 1;
const handleRange = { start_handle: nextStartHandle, end_handle: service.endHandle };
if (service.endHandle <= nextStartHandle) {
finishCharacteristicDiscovery();
return;
}
// Do one more round with discovery of characteristics
this._adapter.gattcDiscoverCharacteristics(device.connectionHandle, handleRange, err => {
if (err) {
this.emit('error', 'Failed to get Characteristics');
// Call getCharacteristics callback??
}
});
}
_parseGattcDescriptorDiscoveryResponseEvent(event) {
const device = this._getDeviceByConnectionHandle(event.conn_handle);
const descriptors = event.descs;
const gattOperation = this._gattOperationsMap[device.instanceId];
const finishDescriptorDiscovery = () => {
if (_.isEmpty(gattOperation.pendingHandleReads)) {
// No pending reads to wait for.
const callbackDescriptors = [];
for (let descriptorInstanceId in this._descriptors) {
const descriptor = this._descriptors[descriptorInstanceId];
if (descriptor.characteristicInstanceId === gattOperation.parent.instanceId) {
callbackDescriptors.push(descriptor);
}
}
delete this._gattOperationsMap[device.instanceId];
gattOperation.callback(undefined, callbackDescriptors);
} else {
for (let handle in gattOperation.pendingHandleReads) {
const handleAsNumber = parseInt(handle, 10);
// Just take the first found handle and start the read process.
this._adapter.gattcRead(device.connectionHandle, handleAsNumber, 0, err => {
if (err) {
this.emit('error', err);
// Call getDescriptors callback??
}
});
break;
}
}
};
if (event.count === 0) {
finishDescriptorDiscovery();
return;
}
// We should only receive descriptors under one characteristic.
const characteristic = gattOperation.parent;
let foundNextServiceOrCharacteristic = false;
descriptors.forEach(descriptor => {
if (foundNextServiceOrCharacteristic) {
return;
}
const handle = descriptor.handle;
let uuid = HexConv.numberTo16BitUuid(descriptor.uuid.uuid);
if (descriptor.uuid.type >= this._bleDriver.BLE_UUID_TYPE_VENDOR_BEGIN) {
uuid = this._converter.lookupVsUuid(descriptor.uuid);
} else if (descriptor.uuid.type === this._bleDriver.BLE_UUID_TYPE_UNKNOWN) {
uuid = 'Unknown 128 bit descriptor uuid ';
}
// TODO: Fix magic number? Primary Service and Characteristic Declaration uuids
if (uuid === '2800' || uuid === '2803') {
// Found a service or characteristic declaration
foundNextServiceOrCharacteristic = true;
return;
}
const newDescriptor = new Descriptor(characteristic.instanceId, uuid, null);
newDescriptor.handle = handle;
this._descriptors[newDescriptor.instanceId] = newDescriptor;
// TODO: We cannot read descriptor 128bit uuid.
gattOperation.pendingHandleReads[handle] = newDescriptor;
});
if (foundNextServiceOrCharacteristic) {
finishDescriptorDiscovery();
return;
}
const service = this._services[gattOperation.parent.serviceInstanceId];
const nextStartHandle = descriptors[descriptors.length - 1].handle + 1;
if (service.endHandle < nextStartHandle) {
finishDescriptorDiscovery();
return;
}
const handleRange = { start_handle: nextStartHandle, end_handle: service.endHandle };
this._adapter.gattcDiscoverDescriptors(device.connectionHandle, handleRange, err => {
this._checkAndPropagateError(err, 'Failed to get Descriptors');
});
}
_parseGattcReadResponseEvent(event) {
const device = this._getDeviceByConnectionHandle(event.conn_handle);
const handle = event.handle;
const data = event.data;
const gattOperation = this._gattOperationsMap[device.instanceId];
if(!gattOperation) {
return;
}
if (gattOperation && gattOperation.pendingHandleReads && !_.isEmpty(gattOperation.pendingHandleReads)) {
const pendingHandleReads = gattOperation.pendingHandleReads;
const attribute = pendingHandleReads[handle];
if (!attribute) {
this.emit('logMessage', logLevel.DEBUG, `Unable to find attribute with handle ${event.handle} ` +
'when parsing GATTC read response event.');
return;
}
delete pendingHandleReads[handle];
if (attribute instanceof Service) {
// TODO: Translate from uuid to name?
attribute.uuid = HexConv.arrayTo128BitUuid(data);
this.emit('serviceAdded', attribute);
if (_.isEmpty(pendingHandleReads)) {
const callbackServices = [];
for (let serviceInstanceId in this._services) {
if (this._services[serviceInstanceId].deviceInstanceId === device.instanceId) {
callbackServices.push(this._services[serviceInstanceId]);
}
}
delete this._gattOperationsMap[device.instanceId];
gattOperation.callback(undefined, callbackServices);
}
} else if (attribute instanceof Characteristic) {
// TODO: Translate from uuid to name?
const emitCharacteristicAdded = () => {
/**
* Characteristic was successfully added to the Adapter's GATT attribute table.
*
* @event Adapter#characteristicAdded
* @type {Object}
* @property {Service} attribute - The new added characteristic.
*/
if (attribute.uuid && attribute.value) {
this.emit('characteristicAdded', attribute);
}
};
if (handle === attribute.declarationHandle) {
attribute.uuid = HexConv.arrayTo128BitUuid(data.slice(3));
emitCharacteristicAdded();
} else if (handle === attribute.valueHandle) {
attribute.value = data;
emitCharacteristicAdded();
}
if (_.isEmpty(pendingHandleReads)) {
const callbackCharacteristics = [];
for (let characteristicInstanceId in this._characteristics) {
if (this._characteristics[characteristicInstanceId].serviceInstanceId === attribute.serviceInstanceId) {
callbackCharacteristics.push(this._characteristics[characteristicInstanceId]);
}
}
delete this._gattOperationsMap[device.instanceId];
gattOperation.callback(undefined, callbackCharacteristics);
}
} else if (attribute instanceof Descriptor) {
attribute.value = data;
if (attribute.uuid && attribute.value) {
/**
* Descriptor was successfully added to the Adapter's GATT attribute table.
*
* @event Adapter#descriptorAdded
* @type {Object}
* @property {Service} attribute - The new added descriptor.
*/
this.emit('descriptorAdded', attribute);
}
if (_.isEmpty(pendingHandleReads)) {
const callbackDescriptors = [];
for (let descriptorInstanceId in this._descriptors) {
if (this._descriptors[descriptorInstanceId].characteristicInstanceId === attribute.characteristicInstanceId) {
callbackDescriptors.push(this._descriptors[descriptorInstanceId]);
}
}
delete this._gattOperationsMap[device.instanceId];
gattOperation.callback(undefined, callbackDescriptors);
}
}
for (let newReadHandle in pendingHandleReads) {
const newReadHandleAsNumber = parseInt(newReadHandle, 10);
// Just take the first found handle and start the read process.
this._adapter.gattcRead(device.connectionHandle, newReadHandleAsNumber, 0, err => {
if (err) {
this.emit('error', err);
// Call getAttributecallback callback??
}
});
break;
}
} else {
if (event.gatt_status !== this._bleDriver.BLE_GATT_STATUS_SUCCESS) {
delete this._gattOperationsMap[device.instanceId];
gattOperation.callback(_makeError(`Read operation failed: ${event.gatt_status_name} (0x${HexConv.numberToHexString(event.gatt_status)})`));
return;
}
gattOperation.readBytes = gattOperation.readBytes ? gattOperation.readBytes.concat(event.data) : event.data;
if (event.data.length < this._maxReadPayloadSize(device.instanceId)) {
delete this._gattOperationsMap[device.instanceId];
gattOperation.callback(undefined, gattOperation.readBytes);
} else if (event.data.length === this._maxReadPayloadSize(device.instanceId)) {
// We need to read more:
this._adapter.gattcRead(event.conn_handle, event.handle, gattOperation.readBytes.length, err => {
if (err) {
delete this._gattOperationsMap[device.instanceId];
this.emit('error', _makeError('Read value failed', err));
gattOperation.callback('Failed reading at byte #' + gattOperation.readBytes.length);
}
});
} else {
delete this._gattOperationsMap[device.instanceId];
this.emit('error', 'Length of Read response is > mtu');
gattOperation.callback('Invalid read response length. (> mtu)');
}
}
}
_parseGattcWriteResponseEvent(event) {
// 1. Check if there is a long write in progress for this device
// 2a. If there is check if it is done after next write
// 2ai. If it is done after next write
// Perform the last write and if success, exec write on fail, cancel write
// callback, delete callback, delete pending write, emit
// 2aii. if not done, issue one more PREPARED_WRITE, update pendingwrite
// TODO: Do more checking of write response?
const device = this._getDeviceByConnectionHandle(event.conn_handle);
const handle = event.handle;
const gattOperation = this._gattOperationsMap[device.instanceId];
if (!device) {
delete this._gattOperationsMap[device.instanceId];
this.emit('error', 'Failed to handle write event, no device with handle ' + device.instanceId + 'found.');
gattOperation.callback(_makeError('Failed to handle write event, no device with connection handle ' + event.conn_handle + 'found'));
return;
}
if (event.write_op === this._bleDriver.BLE_GATT_OP_WRITE_CMD) {
gattOperation.attribute.value = gattOperation.value;
} else if (event.write_op === this._bleDriver.BLE_GATT_OP_PREP_WRITE_REQ) {
const writeParameters = {
write_op: 0,
flags: 0,
handle: handle,
offset: 0,
len: 0,
value: [],
};
if (gattOperation.bytesWritten < gattOperation.value.length) {
const value = gattOperation.value.slice(gattOperation.bytesWritten, gattOperation.bytesWritten + this._maxLongWritePayloadSize(device.instanceId));
writeParameters.write_op = this._bleDriver.BLE_GATT_OP_PREP_WRITE_REQ;
writeParameters.handle = handle;
writeParameters.offset = gattOperation.bytesWritten;
writeParameters.len = value.length;
writeParameters.value = value;
gattOperation.bytesWritten += value.length;
this._adapter.gattcWrite(device.connectionHandle, writeParameters, err => {
if (err) {
this._longWriteCancel(device, gattOperation.attribute);
this.emit('error', _makeError('Failed to write value to device/handle ' + device.instanceId + '/' + handle, err));
return;
}
});
} else {
writeParameters.write_op = this._bleDriver.BLE_GATT_OP_EXEC_WRITE_REQ;
writeParameters.flags = this._bleDriver.BLE_GATT_EXEC_WRITE_FLAG_PREPARED_WRITE;
this._adapter.gattcWrite(device.connectionHandle, writeParameters, err => {
if (err) {
this._longWriteCancel(device, gattOperation.attribute);
this.emit('error', _makeError('Failed to write value to device/handle ' + device.instanceId + '/' + handle, err));
return;
}
});
}
return;
} else if (event.write_op === this._bleDriver.BLE_GATT_OP_WRITE_REQ ||
event.write_op === this._bleDriver.BLE_GATT_OP_EXEC_WRITE_REQ) {
gattOperation.attribute.value = gattOperation.value;
delete this._gattOperationsMap[device.instanceId];
if (event.gatt_status !== this._bleDriver.BLE_GATT_STATUS_SUCCESS) {
gattOperation.callback(_makeError(`Write operation failed: ${event.gatt_status_name} (0x${HexConv.numberToHexString(event.gatt_status)})`));
return;
}
}
this._emitAttributeValueChanged(gattOperation.attribute);
gattOperation.callback(undefined, gattOperation.attribute);
}
_getServiceByHandle(deviceInstanceId, handle) {
let foundService = null;
for (let serviceInstanceId in this._services) {
const service = this._services[serviceInstanceId];
if (!_.isEqual(service.deviceInstanceId, deviceInstanceId)) {
continue;
}
if (service.startHandle <= handle && (!foundService || foundService.startHandle <= service.startHandle)) {
foundService = service;
}
}
return foundService;
}
_getCharacteristicByHandle(deviceInstanceId, handle) {
const service = this._getServiceByHandle(deviceInstanceId, handle);
let foundCharacteristic = null;
for (let characteristicInstanceId in this._characteristics) {
const characteristic = this._characteristics[characteristicInstanceId];
if (characteristic.serviceInstanceId !== service.instanceId) {
continue;
}
if (characteristic.declarationHandle <= handle && (!foundCharacteristic || foundCharacteristic.declarationHandle < characteristic.declarationHandle)) {
foundCharacteristic = characteristic;
}
}
return foundCharacteristic;
}
_getCharacteristicByValueHandle(devinceInstanceId, valueHandle) {
return _.find(this._characteristics, characteristic => this._services[characteristic.serviceInstanceId].deviceInstanceId === devinceInstanceId && characteristic.valueHandle === valueHandle);
}
_getDescriptorByHandle(deviceInstanceId, handle) {
const characteristic = this._getCharacteristicByHandle(deviceInstanceId, handle);
for (let descriptorInstanceId in this._descriptors) {
const descriptor = this._descriptors[descriptorInstanceId];
if (descriptor.characteristicInstanceId !== characteristic.instanceId) {
continue;
}
if (descriptor.handle === handle) {
return descriptor;
}
}
return null;
}
_getAttributeByHandle(deviceInstanceId, handle) {
return this._getDescriptorByHandle(deviceInstanceId, handle) ||
this._getCharacteristicByValueHandle(deviceInstanceId, handle) ||
this._getCharacteristicByHandle(deviceInstanceId, handle) ||
this._getServiceByHandle(deviceInstanceId, handle);
}
_emitAttributeValueChanged(attribute) {
if (attribute instanceof Characteristic) {
/**
* The value of a characteristic in the Adapter's GATT attribute table changed.
*
* @event Adapter#characteristicValueChanged
* @type {Object}
* @property {Characteristic} attribute - The changed characteristic.
*/
this.emit('characteristicValueChanged', attribute);
} else if (attribute instanceof Descriptor) {
/**
* The value of a descriptor in the Adapter's GATT attribute table changed.
*
* @event Adapter#descriptorValueChanged
* @type {Object}
* @property {Descriptor} attribute - The changed descriptor.
*/
this.emit('descriptorValueChanged', attribute);
}
}
_parseGattcHvxEvent(event) {
if (event.type === this._bleDriver.BLE_GATT_HVX_INDICATION) {
this._adapter.gattcConfirmHandleValue(event.conn_handle, event.handle, error => {
if (error) {
this.emit('error', _makeError('Failed to call gattcConfirmHandleValue', error));
}
});
}
const device = this._getDeviceByConnectionHandle(event.conn_handle);
const characteristic = this._getCharacteristicByValueHandle(device.instanceId, event.handle);
if (!characteristic) {
this.emit('logMessage', logLevel.DEBUG, `Cannot handle HVX event. No characteristic value with handle ${event.handle} found.`);
return;
}
characteristic.value = event.data;
this.emit('characteristicValueChanged', characteristic);
}
_parseGattcExchangeMtuResponseEvent(event) {
const device = this._getDeviceByConnectionHandle(event.conn_handle);
const gattOperation = this._gattOperationsMap[device.instanceId];
const previousMtu = this._attMtuMap[device.instanceId];
const newMtu = Math.min(event.server_rx_mtu, gattOperation.clientRxMtu);
this._attMtuMap[device.instanceId] = newMtu;
if (newMtu !== previousMtu) {
device.mtu = newMtu;
/**
* Exchange MTU Response event.
*
* @event Adapter#attMtuChanged
* @type {Object}
* @property {Device} device - The Device instance representing the BLE peer we've connected to.
* @property {number} newMtu - Server RX MTU size.
*/
this.emit('attMtuChanged', device, newMtu);
}
if (gattOperation && gattOperation.callback) {
gattOperation.callback(null, newMtu);
delete this._gattOperationsMap[device.instanceId];
}
}
_parseGattTimeoutEvent(event) {
const device = this._getDeviceByConnectionHandle(event.conn_handle);
const gattOperation = this._gattOperationsMap[device.instanceId];
const error = _makeError('Received a Gatt timeout');
this.emit('error', error);
if (gattOperation) {
if (gattOperation.callback) {
gattOperation.callback(error);
}
delete this._gattOperationsMap[device.instanceId];
}
}
_parseGattsWriteEvent(event) {
// TODO: BLE_GATTS_OP_SIGN_WRITE_CMD not supported?
// TODO: Support auth_required flag
const device = this._getDeviceByConnectionHandle(event.conn_handle);
const attribute = this._getAttributeByHandle('local.server', event.handle);
if (event.op === this._bleDriver.BLE_GATTS_OP_WRITE_REQ ||
event.op === this._bleDriver.BLE_GATTS_OP_WRITE_CMD) {
if (this._instanceIdIsOnLocalDevice(attribute.instanceId) && this._isCCCDDescriptor(attribute.instanceId)) {
this._setDescriptorValue(attribute, event.data, device.instanceId);
this._emitAttributeValueChanged(attribute);
} else {
this._setAttributeValueWithOffset(attribute, event.data, event.offset);
this._emitAttributeValueChanged(attribute);
}
}
}
_parseGattsRWAutorizeRequestEvent(event) {
const device = this._getDeviceByConnectionHandle(event.conn_handle);
let promiseChain = new Promise(resolve => resolve());
let authorizeReplyParams;
const createWritePromise = (handle, data, offset) => {
return new Promise((resolve, reject) => {
const attribute = this._getAttributeByHandle('local.server', handle);
this._writeLocalValue(attribute, data, offset, error => {
if (error) {
this.emit('error', _makeError('Failed to set local attribute value from rwAuthorizeRequest', error));
reject(_makeError('Failed to set local attribute value from rwAuthorizeRequest', error));
} else {
this._emitAttributeValueChanged(attribute);
resolve();
}
});
});
};
if (event.type === this._bleDriver.BLE_GATTS_AUTHORIZE_TYPE_WRITE) {
if (event.write.op === this._bleDriver.BLE_GATTS_OP_WRITE_REQ) {
promiseChain = promiseChain.then(() => {
createWritePromise(event.write.handle, event.write.data, event.write.offset);
});
authorizeReplyParams = {
type: event.type,
write: {
gatt_status: this._bleDriver.BLE_GATT_STATUS_SUCCESS,
update: 1,
offset: event.write.offset,
len: event.write.len,
data: event.write.data,
},
};
} else if (event.write.op === this._bleDriver.BLE_GATTS_OP_PREP_WRITE_REQ) {
if (!this._preparedWritesMap[device.instanceId]) {
this._preparedWritesMap[device.instanceId] = [];
}
let preparedWrites = this._preparedWritesMap[device.instanceId];
preparedWrites = preparedWrites.concat({ handle: event.write.handle, value: event.write.data, offset: event.write.offset });
this._preparedWritesMap[device.instanceId] = preparedWrites;
authorizeReplyParams = {
type: event.type,
write: {
gatt_status: this._bleDriver.BLE_GATT_STATUS_SUCCESS,
update: 1,
offset: event.write.offset,
len: event.write.len,
data: event.write.data,
},
};
} else if (event.write.op === this._bleDriver.BLE_GATTS_OP_EXEC_WRITE_REQ_CANCEL) {
delete this._preparedWritesMap[device.instanceId];
authorizeReplyParams = {
type: event.type,
write: {
gatt_status: this._bleDriver.BLE_GATT_STATUS_SUCCESS,
update: 0,
offset: 0,
len: 0,
data: [],
},
};
} else if (event.write.op === this._bleDriver.BLE_GATTS_OP_EXEC_WRITE_REQ_NOW) {
for (let preparedWrite of this._preparedWritesMap[device.instanceId]) {
promiseChain = promiseChain.then(() => {
createWritePromise(preparedWrite.handle, preparedWrite.value, preparedWrite.offset);
});
}
delete this._preparedWritesMap[device.instanceId];
authorizeReplyParams = {
type: event.type,
write: {
gatt_status: this._bleDriver.BLE_GATT_STATUS_SUCCESS,
update: 0,
offset: 0,
len: 0,
data: [],
},
};
}
} else if (event.type === this._bleDriver.BLE_GATTS_AUTHORIZE_TYPE_READ) {
authorizeReplyParams = {
type: event.type,
read: {
gatt_status: this._bleDriver.BLE_GATT_STATUS_SUCCESS,
update: 0, // 0 = Don't provide data here, read from server.
offset: 0,
len: 0,
data: [],
},
};
}
promiseChain.then(() => {
this._adapter.gattsReplyReadWriteAuthorize(event.conn_handle, authorizeReplyParams, error => {
if (error) {
this.emit('error', _makeError('Failed to call gattsReplyReadWriteAuthorize', error));
}
});
});
}
_parseGattsSysAttrMissingEvent(event) {
this._adapter.gattsSystemAttributeSet(event.conn_handle, null, 0, 0, error => {
if (error) {
this.emit('error', _makeError('Failed to call gattsSystemAttributeSet', error));
}
});
}
_parseGattsHvcEvent(event) {
const remoteDevice = this._getDeviceByConnectionHandle(event.conn_handle);
const characteristic = this._getCharacteristicByHandle('local.server', event.handle);
if (this._pendingNotificationsAndIndications.deviceNotifiedOrIndicated) {
this._pendingNotificationsAndIndications.deviceNotifiedOrIndicated(remoteDevice, characteristic);
}
/**
* Handle Value Notification or Indication event.
*
* @event Adapter#deviceNotifiedOrIndicated
* @type {Object}
* @property {Device} remoteDevice - The Device instance representing the BLE peer we've connected to.
* @property {Characteristic} characteristic - Characteristic to which the HVx operation applies.
*/
this.emit('deviceNotifiedOrIndicated', remoteDevice, characteristic);
this._pendingNotificationsAndIndications.remainingIndicationConfirmations--;
if (this._sendingNotificationsAndIndicationsComplete()) {
this._pendingNotificationsAndIndications.completeCallback(undefined, characteristic);
this._pendingNotificationsAndIndications = {};
}
}
_parseGattsExchangeMtuRequestEvent(event) {
const device = this._getDeviceByConnectionHandle(event.conn_handle);
/**
* ATT MTU Request.
*
* @event Adapter#attMtuRequest
* @type {Object}
* @property {Device} device - The Device instance representing the BLE peer we're connected to.
* @property {Object} mtu - requested ATT MTU.
*/
this.emit('attMtuRequest', device, event.client_rx_mtu);
}
_parseMemoryRequestEvent(event) {
if (event.type === this._bleDriver.BLE_USER_MEM_TYPE_GATTS_QUEUED_WRITES) {
this._adapter.replyUserMemory(event.conn_handle, null, error => {
if (error) {
this.emit('error', _makeError('Failed to call replyUserMemory', error));
}
});
}
}
_parseTxCompleteEvent(event) {
const remoteDevice = this._getDeviceByConnectionHandle(event.conn_handle);
/**
* Transmission Complete.
*
* @event Adapter#txComplete
* @type {Object}
* @property {Device} remoteDevice - The Device instance representing the BLE peer we've connected to.
* @property {number} event.count - Number of packets transmitted.
*/
this.emit('txComplete', remoteDevice, event.count);
}
_setAttributeValueWithOffset(attribute, value, offset) {
attribute.value = attribute.value.slice(0, offset).concat(value);
}
/**
* Gets and updates this adapter's state.
*
* @param {function(Error, AdapterState)} [callback] Callback signature: (err, state) => {} where `state` is an
* instance of `AdapterState` corresponding to this adapter's
* stored state.
* @returns {void}
*/
getState(callback) {
const changedStates = {};
this._adapter.getVersion((version, err) => {
if (this._checkAndPropagateError(
err,
'Failed to retrieve softdevice firmwareVersion.',
callback)) return;
changedStates.firmwareVersion = version;
this._adapter.gapGetDeviceName((name, err) => {
if (this._checkAndPropagateError(
err,
'Failed to retrieve driver version.',
callback)) return;
changedStates.name = name;
this._adapter.gapGetAddress((address, err) => {
if (this._checkAndPropagateError(
err,
'Failed to retrieve device address.',
callback)) return;
changedStates.address = address;
changedStates.available = true;
changedStates.bleEnabled = true;
this._changeState(changedStates);
if (callback) { callback(undefined, this._state); }
});
});
});
}
/**
* Sets this adapter's BLE device's GAP name.
*
* @param {string} name GAP device name.
* @param {function(Error)} [callback] Callback signature: err => {}.
* @returns {void}
*/
setName(name, callback) {
let _name = name.split();
this._adapter.gapSetDeviceName({ sm: 0, lv: 0 }, _name, err => {
if (err) {
this.emit('error', _makeError('Failed to set name to adapter', err));
} else if (this._state.name !== name) {
this._state.name = name;
this._changeState({ name: name });
}
if (callback) { callback(err); }
});
}
_getAddressStruct(address, type) {
return { address: address, type: type };
}
/**
* @summary Sets this adapter's BLE device's local Bluetooth identity address.
*
* The local Bluetooth identity address is the address that identifies this device to other peers.
* The address type must be either `BLE_GAP_ADDR_TYPE_PUBLIC` or 'BLE_GAP_ADDR_TYPE_RANDOM_STATIC'.
* The identity address cannot be changed while roles are running.
*
* @param {string} address The local Bluetooth identity address.
* @param {string} type The address type. 'BLE_GAP_ADDR_TYPE_RANDOM_STATIC' or `BLE_GAP_ADDR_TYPE_PUBLIC`.
* @param {function(Error)} [callback] Callback signature: err => {}.
* @returns {void}
*/
setAddress(address, type, callback) {
// TODO: if privacy is active use this._bleDriver.BLE_GAP_ADDR_CYCLE_MODE_AUTO?
const cycleMode = this._bleDriver.BLE_GAP_ADDR_CYCLE_MODE_NONE;
const addressStruct = this._getAddressStruct(address, type);
this._adapter.gapSetAddress(cycleMode, addressStruct, err => {
if (err) {
this.emit('error', _makeError('Failed to set address', err));
} else if (this._state.address !== address) {
this._changeState({ address: address });
}
if (callback) { callback(err); }
});
}
_setDeviceName(deviceName, security, callback) {
const convertedSecurity = Converter.securityModeToDriver(security);
this._adapter.gapSetDeviceName(convertedSecurity, deviceName, err => {
if (err) {
this.emit('error', _makeError('Failed to set device name', err));
}
if (callback) { callback(err); }
});
}
_setDeviceNameFromArray(valueArray, writePerm, callback) {
const nameArray = valueArray.concat(0);
this._setDeviceName(nameArray, writePerm, callback);
}
_setAppearance(appearance, callback) {
this._adapter.gapSetAppearance(appearance, err => {
if (err) {
this.emit('error', _makeError('Failed to set appearance', err));
}
if (callback) { callback(err); }
});
}
_setAppearanceFromArray(valueArray, callback) {
const appearanceValue = valueArray[0] + (valueArray[1] << 8);
this._setAppearance(appearanceValue, callback);
}
_setPPCP(ppcp, callback) {
this._adapter.gapSetPPCP(ppcp, err => {
if (err) {
this.emit('error', _makeError('Failed to set PPCP', err));
}
if (callback) { callback(err); }
});
}
_setPPCPFromArray(valueArray, callback) {
// TODO: Fix addon parameter check to also accept arrays? Atleast avoid converting twice
const ppcpParameter = {
min_conn_interval: (valueArray[0] + (valueArray[1] << 8)) * (1250 / 1000),
max_conn_interval: (valueArray[2] + (valueArray[3] << 8)) * (1250 / 1000),
slave_latency: (valueArray[4] + (valueArray[5] << 8)),
conn_sup_timeout: (valueArray[6] + (valueArray[7] << 8)) * (10000 / 1000),
};
this._setPPCP(ppcpParameter, callback);
}
/**
* Get this adapter's connected device/devices.
* @returns {Device[]} An array of this adapter's connected device/devices.
*/
getDevices() {
return this._devices;
}
/**
* Get a device connected to this adapter by its instanceId.
*
* @param {string} deviceInstanceId The device's unique Id.
* @returns {null|Device} The device connected to this adapter corresponding to `deviceInstanceId`.
*/
getDevice(deviceInstanceId) {
return this._devices[deviceInstanceId];
}
_getDeviceByConnectionHandle(connectionHandle) {
const foundDeviceId = Object.keys(this._devices).find(deviceId => {
return this._devices[deviceId].connectionHandle === connectionHandle;
});
return this._devices[foundDeviceId];
}
_getDeviceByAddress(address) {
const foundDeviceId = Object.keys(this._devices).find(deviceId => {
return this._devices[deviceId].address === address;
});
return this._devices[foundDeviceId];
}
/**
* @summary Start scanning (GAP Discovery procedure, Observer Procedure).
*
* @param {Object} options The GAP scanning parameters.
* Available scan parameters:
*
* - {boolean} active If 1, perform active scanning (scan requests).
*
- {number} interval Scan interval between 0x0004 and 0x4000 in 0.625ms units (2.5ms to 10.24s).
*
- {number} window Scan window between 0x0004 and 0x4000 in 0.625ms units (2.5ms to 10.24s).
*
- {number} timeout Scan timeout between 0x0001 and 0xFFFF in seconds, 0x0000 disables timeout.
*
- {number} use_whitelist If 1, filter advertisers using current active whitelist.
*
- {number} adv_dir_report If 1, also report directed advertisements where the initiator field is set to a
* private resolvable address, even if the address did not resolve to an entry in the
* device identity list. A report will be generated even if the peer is not in the whitelist.
*
* @param {function(Error)} [callback] Callback signature: err => {}.
* @returns {void}
*/
startScan(options, callback) {
this._adapter.gapStartScan(options, err => {
if (err) {
this.emit('error', _makeError('Error occured when starting scan', err));
} else {
this._changeState({ scanning: true });
}
if (callback) { callback(err); }
});
}
/**
* Stop scanning (GAP Discovery procedure, Observer Procedure).
*
* @param {function(Error)} [callback] Callback signature: err => {}.
* @returns {void}
*/
stopScan(callback) {
this._adapter.gapStopScan(err => {
if (err) {
// TODO: probably is state already set to false, but should we make sure? if yes, emit stateChanged?
this.emit('error', _makeError('Error occured when stopping scanning', err));
} else {
this._changeState({ scanning: false });
}
if (callback) { callback(err); }
});
}
/**
* @summary Create a connection (GAP Link Establishment).
*
* If a scanning procedure is currently in progress it will be automatically stopped when calling this function.
*
* The application will be informed of a connection being established with a event:DeviceConnectedEvent.
*
* @param {string|Object} deviceAddress The peer address. If the use_whitelist bit is set in scanParams,
* then this is ignored. If given as a string,
* `address.type='BLE_GAP_ADDR_TYPE_RANDOM_STATIC'` by default. Else,
* an Object with members: { address: {string}, type: {string} } must be given.
* @param {Object} options The scan and connection parameters.
* Available options:
*
* - {Object} scanParams:
*
* - {boolean} active: If 1, perform active scanning (scan requests).
*
- {number} interval: Scan interval between 0x0004 and 0x4000 in 0.625ms units (2.5ms to 10.24s).
*
- {number} window: Scan window between 0x0004 and 0x4000 in 0.625ms units (2.5ms to 10.24s).
*
- {number} timeout: Scan timeout between 0x0001 and 0xFFFF in seconds, 0x0000 disables timeout.
*
- {number} use_whitelist: If 1, filter advertisers using current active whitelist.
*
- {number} adv_dir_report: If 1, also report directed advertisements where the initiator field is set to a
* private resolvable address, even if the address did not resolve to an entry in the
* device identity list. A report will be generated even if the peer is not in the whitelist.
*
* - {Object} connParams:
*
* - {number} min_conn_interval: Minimum Connection Interval in 1.25 ms units.
*
- {number} max_conn_interval: Maximum Connection Interval in 1.25 ms units.
*
- {number} slave_latency: Slave Latency in number of connection events.
*
- {number} conn_sup_timeout: Connection Supervision Timeout in 10 ms units.
*
*
* @param {function(Error)} [callback] Callback signature: err => {}.
* @returns {void}
*/
connect(deviceAddress, options, callback) {
if (!_.isEmpty(this._gapOperationsMap)) {
const errorObject = _makeError('Could not connect. Another connect is in progress.');
this.emit('error', errorObject);
if (callback) callback(errorObject);
return;
}
var address = {};
if (typeof deviceAddress === 'string') {
address.address = deviceAddress;
address.type = 'BLE_GAP_ADDR_TYPE_RANDOM_STATIC';
} else {
address = deviceAddress;
}
this._changeState({ scanning: false, connecting: true });
this._adapter.gapConnect(address, options.scanParams, options.connParams, err => {
if (err) {
this._changeState({ connecting: false });
const errorMsg = (err.errcode === 'NRF_ERROR_CONN_COUNT') ?
_makeError(`Could not connect. Max number of connections reached.`, err)
: _makeError(`Could not connect to ${deviceAddress.address}`, err);
this.emit('error', errorMsg);
if (callback) { callback(errorMsg); }
} else {
this._gapOperationsMap.connecting = { deviceAddress: address, callback: callback };
}
});
}
/**
* Cancel a connection establishment.
*
* @param {function(Error)} [callback] Callback signature: err => {}.
* @returns {void}
*/
cancelConnect(callback) {
this._adapter.gapCancelConnect(err => {
if (err) {
// TODO: log more
const newError = _makeError('Error occured when canceling connection', err);
this.emit('error', newError);
if (callback) { callback(newError); }
} else {
const errorObject = _makeError('Connection canceled.');
const connectingCallback = this._gapOperationsMap.connecting.callback;
if (connectingCallback) connectingCallback(errorObject);
delete this._gapOperationsMap.connecting;
this._changeState({ connecting: false });
if (callback) { callback(); }
}
});
}
// Enable the client role and starts advertising
_getAdvertisementParams(params) {
var retval = {};
retval.channel_mask = {};
retval.channel_mask.ch_37_off = false;
retval.channel_mask.ch_38_off = false;
retval.channel_mask.ch_39_off = false;
if (params.channelMask) {
for (let channel in params.channelMask) {
switch (params.channelMask[channel]) {
case 'ch37off':
retval.channel_mask.ch_37_off = true;
break;
case 'ch38off':
retval.channel_mask.ch_38_off = true;
break;
case 'ch39off':
retval.channel_mask.ch_39_off = true;
break;
default:
throw new Error(`Channel ${channel} is not possible to switch off during advertising.`);
}
}
}
if (params.interval) {
retval.interval = params.interval;
} else {
throw new Error('You have to provide an interval.');
}
if (params.timeout || params.timeout === 0) {
retval.timeout = params.timeout;
} else {
throw new Error('You have to provide a timeout.');
}
// TOOD: fix fp logic later
retval.fp = this._bleDriver.BLE_GAP_ADV_FP_ANY;
// Default value is that device is connectable undirected.
retval.type = this._bleDriver.BLE_GAP_ADV_TYPE_ADV_IND;
// TODO: we do not support directed connectable mode yet
if (params.connectable !== undefined) {
if (!params.connectable) {
retval.type |= this._bleDriver.BLE_GAP_ADV_TYPE_NONCONN_IND;
}
}
if (params.scannable !== undefined) {
if (params.scannable) {
retval.type |= this._bleDriver.BLE_GAP_ADV_TYPE_ADV_SCAN_IND;
}
}
return retval;
}
/**
* @summary Start advertising (GAP Discoverable, Connectable modes, Broadcast Procedure).
*
* An application can start an advertising procedure for broadcasting purposes while a connection
* is active. After a BLE_GAP_EVT_CONNECTED event is received, this function may therefore
* be called to start a broadcast advertising procedure. The advertising procedure
* cannot however be connectable (it must be of type BLE_GAP_ADV_TYPE_ADV_SCAN_IND or
* BLE_GAP_ADV_TYPE_ADV_NONCONN_IND).
*
* Only one advertiser may be active at any time.
* @param {Object} options GAP advertising parameters.
* Available GAP advertising parameters:
*
* - {number} channelMask: Channel mask for RF channels used in advertising. Default: all channels on.
*
- {number} interval: GAP Advertising interval. Required: an interval must be provided.
*
- {number} timeout: Maximum advertising time in limited discoverable mode. Required: a timeout must be provided.
*
- {boolean} connectable: GAP Advertising type connectable. Default: The device is connectable.
*
- {boolean} scannable: GAP Advertising type scannable. Default: The device is undirected.
*
* @param {function(Error)} [callback] Callback signature: err => {}.
* @returns {void}
*/
startAdvertising(options, callback) {
const advParams = this._getAdvertisementParams(options);
this._adapter.gapStartAdvertising(advParams, err => {
if (this._checkAndPropagateError(err, 'Failed to start advertising.', callback)) return;
this._changeState({ advertising: true });
if (callback) { callback(); }
});
}
/**
* @summary Set, clear or update advertising and scan response data.
* The format of the advertising data will be checked by this call to ensure interoperability.
* Limitations imposed by this API call to the data provided include having a flags data type in the scan response data and
* duplicating the local name in the advertising data and scan response data.
*
* To clear the advertising data and set it to a 0-length packet, simply provide a null `advData`/`scanRespData` parameter.
*
* The call will fail if `advData` and `scanRespData` are both null since this would have no effect.
*
* See @ref: ./util/adType.js for possible advertisement object parameters.
* Note: should multiple custom properties be required in the advData or scanRespData,
* it is possible to append 'custom' key with colon plus anything, like 'custom:1'.
*
* @param {Object} advData Advertising packet
* @param {Object} scanRespData Scan response packet.
*
* @param {function(Error)} [callback] Callback signature: err => {}.
* @returns {void}
*/
setAdvertisingData(advData, scanRespData, callback) {
const advDataStruct = Array.from(AdType.convertToBuffer(advData));
const scanRespDataStruct = Array.from(AdType.convertToBuffer(scanRespData));
this._adapter.gapSetAdvertisingData(
advDataStruct,
scanRespDataStruct,
err => {
if (this._checkAndPropagateError(err, 'Failed to set advertising data.', callback)) return;
if (callback) { callback(); }
}
);
}
/**
* Stop advertising (GAP Discoverable, Connectable modes, Broadcast Procedure).
*
* @param {function(Error)} [callback] Callback signature: err => {}.
* @returns {void}
*/
stopAdvertising(callback) {
this._adapter.gapStopAdvertising(err => {
if (this._checkAndPropagateError(err, 'Failed to stop advertising.', callback)) return;
this._changeState({ advertising: false });
if (callback) { callback(); }
});
}
/**
* @summary Disconnect (GAP Link Termination).
* This call initiates the disconnection procedure, and its completion will be communicated to the application
* with a `BLE_GAP_EVT_DISCONNECTED` event upon which `callback` will be called.
*
* @param {string} deviceInstanceId The device's unique Id.
* @param {function(Error)} [callback] Callback signature: err => {}.
* @returns {void}
*/
disconnect(deviceInstanceId, callback) {
const device = this.getDevice(deviceInstanceId);
if (!device) {
const errorObject = _makeError('Failed to disconnect', 'Failed to find device with id ' + deviceInstanceId);
this.emit('error', errorObject);
if (callback) callback(errorObject);
return;
}
const hciStatusCode = this._bleDriver.BLE_HCI_REMOTE_USER_TERMINATED_CONNECTION;
this._gapOperationsMap[deviceInstanceId] = {
callback: callback,
};
this._adapter.gapDisconnect(device.connectionHandle, hciStatusCode, err => {
if (err) {
const errorObject = _makeError('Failed to disconnect', err);
delete this._gapOperationsMap[deviceInstanceId];
this.emit('error', errorObject);
if (callback) { callback(errorObject); }
} else {
// Expect a disconnect event down the road
}
});
}
_getConnectionUpdateParams(options) {
return {
min_conn_interval: options.minConnectionInterval,
max_conn_interval: options.maxConnectionInterval,
slave_latency: options.slaveLatency,
conn_sup_timeout: options.connectionSupervisionTimeout,
};
}
/**
* @summary Update connection parameters.
*
* In the central role this will initiate a Link Layer connection parameter update procedure,
* otherwise in the peripheral role, this will send the corresponding L2CAP request and wait for
* the central to perform the procedure. In both cases, and regardless of success or failure, the application
* will be informed of the result with a event:connParamUpdateEvent.
*
* @param {string} deviceInstanceId The device's unique Id.
* @param {Object} options GAP Connection Parameters.
* Available GAP Connection Parameters:
*
* - {number} min_conn_interval: Minimum Connection Interval in 1.25 ms units.
*
- {number} max_conn_interval: Maximum Connection Interval in 1.25 ms units.
*
- {number} slave_latency: Slave Latency in number of connection events.
*
- {number} conn_sup_timeout: Connection Supervision Timeout in 10 ms units.
*
* @param {function(Error)} [callback] Callback signature: err => {}.
* @returns {void}
*/
updateConnectionParameters(deviceInstanceId, options, callback) {
const device = this.getDevice(deviceInstanceId);
if (!device) {
throw new Error('No device with instance id: ' + deviceInstanceId);
}
const connectionParamsStruct = this._getConnectionUpdateParams(options);
this._adapter.gapUpdateConnectionParameters(device.connectionHandle, connectionParamsStruct, err => {
if (err) {
const errorObject = _makeError('Failed to update connection parameters', err);
this.emit('error', errorObject);
if (callback) { callback(errorObject); }
} else {
this._gapOperationsMap[deviceInstanceId] = {
callback,
};
}
});
}
/**
* Reject a GAP connection parameters update request.
*
* @param {string} deviceInstanceId The device's unique Id.
* @param {function(Error)} [callback] Callback signature: err => {}.
* @returns {void}
*/
rejectConnParams(deviceInstanceId, callback) {
const connectionHandle = this.getDevice(deviceInstanceId).connectionHandle;
// TODO: Does the AddOn support undefined second parameter?
this._adapter.gapUpdateConnectionParameters(connectionHandle, null, err => {
if (this._checkAndPropagateError(err, 'Failed to reject connection parameters', callback)) {
return;
}
if (callback) { callback(err); }
});
}
/**
* Get the current ATT_MTU size.
*
* @param {string} deviceInstanceId The device's unique Id.
* @returns {undefined|number} The current ATT_MTU size.
*/
getCurrentAttMtu(deviceInstanceId) {
if (!(deviceInstanceId in this._attMtuMap)) {
return;
}
return this._attMtuMap[deviceInstanceId];
}
/**
* @summary Start an ATT_MTU exchange by sending an Exchange MTU Request to the server.
*
* The SoftDevice sets ATT_MTU to the minimum of:
*
* - The Client RX MTU value, and
*
- The Server RX MTU value from `BLE_GATTC_EVT_EXCHANGE_MTU_RSP`.
*
*
* However, the SoftDevice never sets ATT_MTU lower than `GATT_MTU_SIZE_DEFAULT` == 23.
*
* @param {string} deviceInstanceId The device's unique Id.
* @param {number} mtu Requested ATT_MTU. Default ATT_MTU is 23. Valid range is between 24 and 247.
* @param {function(Error, number)} [callback] Callback signature: (err, mtu) => {} where `mtu` is the updated
* ATT_MTU value.
* @returns {void}
*/
requestAttMtu(deviceInstanceId, mtu, callback) {
if (this._bleDriver.NRF_SD_BLE_API_VERSION <= 2) {
if (callback) callback(null, this._bleDriver.GATT_MTU_SIZE_DEFAULT);
return;
}
const device = this.getDevice(deviceInstanceId);
if (!device) {
const errorObject = _makeError(`Failed to request att mtu. Failed to find device with id ${deviceInstanceId}`);
if (callback) callback(errorObject);
return;
}
if (this._gattOperationsMap[device.instanceId]) {
this.emit('error', _makeError('Failed to request att mtu. A GATT operation already in progress.'));
return;
}
this._adapter.gattcExchangeMtuRequest(device.connectionHandle, mtu, err => {
if (err) {
const errorObject = _makeError(`Failed to request att mtu: ${err.message}`);
if (callback) callback(errorObject);
return;
}
this._gattOperationsMap[device.instanceId] = { callback, clientRxMtu: mtu };
});
}
/**
* @summary Reply to ATT_MTU exchange request
*
* @param {string} deviceInstanceId The device's unique Id.
* @param {number} mtu Requested ATT_MTU. Default ATT_MTU is 23. Valid range is between 24 and 247.
* @param {function(Error, number)} [callback] Callback signature: (err, mtu) => {} where `mtu` is the updated
* ATT_MTU value.
* @returns {void}
*/
attMtuReply(deviceInstanceId, mtu, callback) {
const device = this.getDevice(deviceInstanceId);
if (!device) {
throw new Error('No device with instance id: ' + deviceInstanceId);
}
/* Make sure the requested mtu does not exceed the max supported size */
const newMtu = Math.min(mtu, MAX_SUPPORTED_ATT_MTU);
this._adapter.gattsExchangeMtuReply(device.connectionHandle, newMtu, error => {
if (error) {
const errorObject = _makeError('Failed to call gattsExchangeMtuReply', error);
this.emit('error', errorObject);
if (callback) { callback(errorObject); }
return;
}
this._attMtuMap[deviceInstanceId] = newMtu;
if (callback) { callback(); }
});
}
/**
* @summary Initiate the GAP Authentication procedure.
*
* In the central role, this function will send an SMP Pairing Request (or an SMP Pairing Failed if rejected),
* otherwise in the peripheral role, an SMP Security Request will be sent.
*
* @param {string} deviceInstanceId The device's unique Id.
* @param {object} secParams The security parameters to be used during the pairing or bonding procedure.
* In the peripheral role, only the bond, mitm, lesc and keypress fields of this Object are used.
* In the central role, this pointer may be NULL to reject a Security Request.
* Available GAP security parameters:
*
* - {boolean} bond Perform bonding.
*
- {boolean} lesc Enable LE Secure Connection pairing.
*
- {boolean} keypress Enable generation of keypress notifications.
*
- {Object} io_caps IO capabilities, see @ref BLE_GAP_IO_CAPS.
*
- {boolean} oob Out Of Band data available.
*
- {number} min_key_size Minimum encryption key size in octets between 7 and 16. If 0 then not applicable in this instance.
*
- {number} max_key_size Maximum encryption key size in octets between min_key_size and 16.
*
- {Object} kdist_own Key distribution bitmap: keys that the local device will distribute.
*
* - {boolean} enc Long Term Key and Master Identification.
*
- {boolean} id Identity Resolving Key and Identity Address Information.
*
- {boolean} sign Connection Signature Resolving Key.
*
- {boolean} link Derive the Link Key from the LTK.
*
* - {Object} kdist_peer Key distribution bitmap: keys that the remote device will distribute.
*
* - ^^ Same as properties as `kdist_own` above. ^^
*
*
* @param {function(Error)} [callback] Callback signature: err => {}.
* @returns {void}
*/
authenticate(deviceInstanceId, secParams, callback) {
const device = this.getDevice(deviceInstanceId);
if (!device) {
const errorObject = _makeError('Failed to authenticate', 'Failed to find device with id ' + deviceInstanceId);
this.emit('error', errorObject);
if (callback) { callback(errorObject); }
return;
}
if (device.role === 'central') {
device.ownPeriphInitiatedPairingPending = true;
}
this._adapter.gapAuthenticate(device.connectionHandle, secParams, err => {
if (this._checkAndPropagateError(err, 'Failed to authenticate', callback)) {
if (device.role === 'central') {
device.ownPeriphInitiatedPairingPending = false;
}
return;
}
if (callback) { callback(); }
});
}
/**
* @summary Reply with GAP security parameters.
*
* This function is only used to reply to a `BLE_GAP_EVT_SEC_PARAMS_REQUEST`, calling it at other times will result in an `NRF_ERROR_INVALID_STATE`.
* If the call returns an error code, the request is still pending, and the reply call may be repeated with corrected parameters.
*
* @param {string} deviceInstanceId The device's unique Id.
* @param {string} secStatus Security status, see `BLE_GAP_SEC_STATUS`.
* @param {Object} secParams Security parameters object. In the central role this must be set to null, as the parameters have
* already been provided during a previous call to `this.authenticate()`.
* @param {Object} secKeyset security key set object.
*
* - {Object} kdist_own Key distribution bitmap: keys that the local device will distribute.
*
* - {boolean} enc Long Term Key and Master Identification.
*
- {boolean} id Identity Resolving Key and Identity Address Information.
*
- {boolean} sign Connection Signature Resolving Key.
*
- {boolean} link Derive the Link Key from the LTK.
*
* - {Object} kdist_peer Key distribution bitmap: keys that the remote device will distribute.
*
* - ^^ Same as properties as `kdist_own` above. ^^
*
*
* @param {function(Error, Object)} [callback] Callback signature: (err, secKeyset) => {} where `secKeyset` is a
* security key set object as described above.
* @returns {void}
*/
replySecParams(deviceInstanceId, secStatus, secParams, secKeyset, callback) {
const device = this.getDevice(deviceInstanceId);
if (!device) {
const errorObject = _makeError('Failed to reply security parameters', 'Failed to find device with id ' + deviceInstanceId);
this.emit('error', errorObject);
if (callback) { callback(errorObject); }
return;
}
this._adapter.gapReplySecurityParameters(device.connectionHandle, secStatus, secParams, secKeyset, (err, secKeyset) => {
if (this._checkAndPropagateError(err, 'Failed to reply security parameters.', callback)) { return; }
if (callback) { callback(err, secKeyset); }
});
}
/**
* @summary Reply with an authentication key.
*
* This function is only used to reply to a `BLE_GAP_EVT_AUTH_KEY_REQUEST `or a `BLE_GAP_EVT_PASSKEY_DISPLAY`, calling it at other times will result in an `NRF_ERROR_INVALID_STATE`.
* If the call returns an error code, the request is still pending, and the reply call may be repeated with corrected parameters.
*
* @param {string} deviceInstanceId The device's unique Id.
* @param {Object} keyType No key, 6-digit Passkey or Out Of Band data.
* @param {null|Array|string} key If key type is `BLE_GAP_AUTH_KEY_TYPE_NONE`, then null.
* If key type is `BLE_GAP_AUTH_KEY_TYPE_PASSKEY`, then a 6-byte array (digit 0..9 only)
* or null when confirming LE Secure Connections Numeric Comparison.
* If key type is `BLE_GAP_AUTH_KEY_TYPE_OOB`, then a 16-byte OOB key value in Little Endian format.
* @param {function(Error)} [callback] Callback signature: err => {}.
* @returns {void}
*/
replyAuthKey(deviceInstanceId, keyType, key, callback) {
const device = this.getDevice(deviceInstanceId);
if (!device) {
const errorObject = _makeError('Failed to reply authenticate key', 'Failed to find device with id ' + deviceInstanceId);
this.emit('error', errorObject);
if (callback) { callback(errorObject); }
return;
}
// If the key is a string we split it into an array before we call gapReplyAuthKey
if (key && key.constructor === String) {
key = Array.from(key);
}
this._adapter.gapReplyAuthKey(device.connectionHandle, keyType, key, err => {
if (this._checkAndPropagateError(err, 'Failed to reply authenticate key.', callback)) { return; }
if (callback) { callback(); }
});
}
/**
* @summary Reply with an LE Secure connections DHKey.
*
* This function is only used to reply to a `BLE_GAP_EVT_LESC_DHKEY_REQUEST`, calling it at other times will result in an `NRF_ERROR_INVALID_STATE`.
* If the call returns an error code, the request is still pending, and the reply call may be repeated with corrected parameters.
*
* @param {string} deviceInstanceId The device's unique Id.
* @param {Object} dhkey LE Secure Connections DHKey.
* @param {function(Error)} [callback] Callback signature: err => {}.
* @returns {void}
*/
replyLescDhkey(deviceInstanceId, dhkey, callback) {
const device = this.getDevice(deviceInstanceId);
if (!device) {
const errorObject = _makeError('Failed to reply lesc dh key', 'Failed to find device with id ' + deviceInstanceId);
this.emit('error', errorObject);
if (callback) { callback(errorObject); }
return;
}
this._adapter.gapReplyLescDhKey(device.connectionHandle, dhkey, err => {
if (this._checkAndPropagateError(err, 'Failed to reply lesc dh key.', callback)) { return; }
if (callback) { callback(); }
});
}
/**
* @summary Notify the peer of a local keypress.
*
* This function can only be used when an authentication procedure using LE Secure Connection is in progress. Calling it at other times will result in an `NRF_ERROR_INVALID_STATE`.
*
* @param {string} deviceInstanceId The device's unique Id.
* @param {number} notificationType See `adapter.driver.BLE_GAP_KP_NOT_TYPES`.
* @param {function(Error)} [callback] Callback signature: err => {}.
* @returns {void}
*/
notifyKeypress(deviceInstanceId, notificationType, callback) {
const device = this.getDevice(deviceInstanceId);
if (!device) {
const errorObject = _makeError('Failed to notify keypress', 'Failed to find device with id ' + deviceInstanceId);
this.emit('error', errorObject);
if (callback) { callback(errorObject); }
return;
}
this._adapter.gapNotifyKeypress(device.connectionHandle, notificationType, err => {
if (this._checkAndPropagateError(err, 'Failed to notify keypress.', callback)) { return; }
if (callback) { callback(); }
});
}
/**
* @summary Generate a set of OOB data to send to a peer out of band.
*
* The `ble_gap_addr_t` included in the OOB data returned will be the currently active one (or, if a connection has already been established,
* the one used during connection setup). The application may manually overwrite it with an updated value.
*
* @param {string} deviceInstanceId The device's unique Id.
* @param {string} ownPublicKey LE Secure Connections local P-256 Public Key.
* @param {function(Error)} [callback] Callback signature: err => {}.
* @returns {void}
*/
getLescOobData(deviceInstanceId, ownPublicKey, callback) {
const device = this.getDevice(deviceInstanceId);
if (!device) {
const errorObject = _makeError('Failed to get lesc oob data', 'Failed to find device with id ' + deviceInstanceId);
this.emit('error', errorObject);
if (callback) { callback(errorObject); }
return;
}
this._adapter.gapGetLescOobData(device.connectionHandle, ownPublicKey, (err, ownOobData) => {
let errorObject;
if (err) {
errorObject = _makeError('Failed to get lesc oob data');
this.emit('error', errorObject);
}
if (callback) { callback(errorObject, ownOobData); }
});
}
/**
* @summary Provide the OOB data sent/received out of band.
*
* At least one of the 2 data objects provided must not be null.
* An authentication procedure with OOB selected as an algorithm must be in progress when calling this function.
* A `BLE_GAP_EVT_LESC_DHKEY_REQUEST` event with the oobd_req set to 1 must have been received prior to calling this function.
*
* @param {string} deviceInstanceId The device's unique Id.
* @param {string} ownOobData The OOB data sent out of band to a peer or NULL if none sent.
* @param {string} peerOobData The OOB data received out of band from a peer or NULL if none received.
* @param {function(Error)} [callback] Callback signature: err => {}.
* @returns {void}
*/
setLescOobData(deviceInstanceId, ownOobData, peerOobData, callback) {
const device = this.getDevice(deviceInstanceId);
if (!device) {
const errorObject = _makeError('Failed to set lesc oob data', 'Failed to find device with id ' + deviceInstanceId);
this.emit('error', errorObject);
if (callback) { callback(errorObject); }
return;
}
this._adapter.gapSetLescOobData(device.connectionHandle, ownOobData, peerOobData, err => {
this._checkAndPropagateError(err, 'Failed to set lesc oob data.', callback);
});
if (callback) { callback(); }
}
/**
* @summary Initiate GAP Encryption procedure.
*
* In the central role, this function will initiate the encryption procedure using the encryption information provided.
*
* @param {string} deviceInstanceId The device's unique Id.
* @param {Object} masterId Master identification structure. TODO
* @param {Object} encInfo Encryption information structure. TODO
* @param {function(Error)} [callback] Callback signature: err => {}.
* @returns {void}
*/
encrypt(deviceInstanceId, masterId, encInfo, callback) {
const device = this.getDevice(deviceInstanceId);
if (!device) {
const errorObject = _makeError('Failed to encrypt', 'Failed to find device with id ' + deviceInstanceId);
this.emit('error', errorObject);
if (callback) { callback(errorObject); }
return;
}
this._adapter.gapEncrypt(device.connectionHandle, masterId, encInfo, err => {
let errorObject;
if (err) {
errorObject = _makeError('Failed to encrypt');
this.emit('error', errorObject);
}
if (callback) { callback(errorObject); }
});
}
/**
* @summary Reply with GAP security information.
*
* This function is only used to reply to a `BLE_GAP_EVT_SEC_INFO_REQUEST`, calling it at other times will result in `NRF_ERROR_INVALID_STATE`.
* If the call returns an error code, the request is still pending, and the reply call may be repeated with corrected parameters.
* Data signing is not yet supported, and signInfo must therefore be null.
*
* @param {string} deviceInstanceId The device's unique Id.
* @param {Object} encInfo Encryption information structure. May be null to signal none is available.
* @param {Object} idInfo Identity information structure. May be null to signal none is available.
* @param {Object} signInfo Pointer to a signing information structure. May be null to signal none is available.
* @param {function(Error)} [callback] Callback signature: err => {}.
* @returns {void}
*/
secInfoReply(deviceInstanceId, encInfo, idInfo, signInfo, callback) {
const device = this.getDevice(deviceInstanceId);
if (!device) {
const errorObject = _makeError('Failed to encrypt', 'Failed to find device with id ' + deviceInstanceId);
this.emit('error', errorObject);
if (callback) { callback(errorObject); }
return;
}
this._adapter.gapReplySecurityInfo(device.connectionHandle, encInfo, idInfo, signInfo, err => {
let errorObject;
if (err) {
errorObject = _makeError('Failed to encrypt');
this.emit('error', errorObject);
}
if (callback) { callback(errorObject); }
});
}
/**
* Set the services in the BLE peripheral device's GATT attribute table.
*
* @param {Service[]} services An array of `Service` objects to be set.
* @param {function(Error)} [callback] Callback signature: err => {}.
* @returns {void}
*/
setServices(services, callback) {
let decodeUUID = (uuid, data) => {
return new Promise((resolve, reject) => {
const length = uuid.length === 32 ? 16 : 2;
this._adapter.decodeUUID(length, uuid, (err, _uuid) => {
if (err) {
// If the UUID is not found it is a 128-bit UUID
// so we have to add it to the SD and try again
if (err.errno === this._bleDriver.NRF_ERROR_NOT_FOUND && length === 16) {
this._converter.uuidToDriver(uuid, (err, type) => {
if (err) {
reject(_makeError(`Unable to add UUID ${uuid} to SoftDevice`, err));
} else {
this._adapter.decodeUUID(length, uuid, (err, _uuid) => {
if (err) {
reject(_makeError(`Unable to decode UUID ${uuid}`, err));
} else {
data.decoded_uuid = _uuid;
resolve(data);
}
});
}
});
} else {
reject(_makeError(`Unable to decode UUID ${uuid}`, err));
}
} else {
data.decoded_uuid = _uuid;
resolve(data);
}
});
});
};
let addService = (service, type, data) => {
return new Promise((resolve, reject) => {
var p = Promise.resolve(data);
var decode = decodeUUID.bind(undefined, service.uuid);
p.then(decode).then(data => {
this._adapter.gattsAddService(type, data.decoded_uuid, (err, serviceHandle) => {
if (err) {
reject(_makeError('Error occurred adding service.', err));
} else {
data.serviceHandle = serviceHandle;
service.startHandle = serviceHandle;
this._services[service.instanceId] = service; // TODO: what if we fail later on this service ?
resolve(data);
}
});
}).catch(err => {
reject(err);
});
});
};
let addCharacteristic = (characteristic, data) => {
return new Promise((resolve, reject) => {
this._converter.characteristicToDriver(characteristic, (err, characteristicForDriver) => {
if (err) {
reject(_makeError('Error converting characteristic to driver.', err));
} else {
this._adapter.gattsAddCharacteristic(
data.serviceHandle,
characteristicForDriver.metadata,
characteristicForDriver.attribute,
(err, handles) => {
if (err) {
reject(_makeError('Error occurred adding characteristic.', err));
} else {
characteristic.valueHandle = data.characteristicHandle = handles.value_handle;
characteristic.declarationHandle = characteristic.valueHandle - 1; // valueHandle is always directly after declarationHandle
this._characteristics[characteristic.instanceId] = characteristic; // TODO: what if we fail later on this ?
resolve(data);
if (!characteristic._factory_descriptors) {
return;
}
const findDescriptor = uuid => {
return characteristic._factory_descriptors.find(descriptor => {
return descriptor.uuid === uuid;
});
};
if (handles.user_desc_handle) {
const userDescriptionDescriptor = findDescriptor('2901');
this._descriptors[userDescriptionDescriptor.instanceId] = userDescriptionDescriptor;
userDescriptionDescriptor.handle = handles.user_desc_handle;
}
if (handles.cccd_handle) {
const cccdDescriptor = findDescriptor('2902');
this._descriptors[cccdDescriptor.instanceId] = cccdDescriptor;
cccdDescriptor.handle = handles.cccd_handle;
cccdDescriptor.value = {};
for (let deviceInstanceId in this._devices) {
this._setDescriptorValue(cccdDescriptor, [0, 0], deviceInstanceId);
}
}
if (handles.sccd_handle) {
const sccdDescriptor = findDescriptor('2903');
this._descriptors[sccdDescriptor.instanceId] = sccdDescriptor;
sccdDescriptor.handle = handles.sccd_handle;
}
}
}
);
}
});
});
};
let addDescriptor = (descriptor, data) => {
return new Promise((resolve, reject) => {
this._converter.descriptorToDriver(descriptor, (err, descriptorForDriver) => {
if (err) {
reject(_makeError('Error converting descriptor.', err));
} else if (descriptorForDriver) {
this._adapter.gattsAddDescriptor(
data.characteristicHandle,
descriptorForDriver,
(err, handle) => {
if (err) {
reject(_makeError(err, 'Error adding descriptor.'));
} else {
descriptor.handle = data.descriptorHandle = handle;
this._descriptors[descriptor.instanceId] = descriptor; // TODO: what if we fail later on this ?
resolve(data);
}
}
);
}
});
});
};
let promiseSequencer = (list, data) => {
var p = Promise.resolve(data);
return list.reduce((previousP, nextP) => {
return previousP.then(nextP);
}, p);
};
let applyGapServiceCharacteristics = gapService => {
for (let characteristic of gapService._factory_characteristics) {
// TODO: Fix Device Name uuid magic number
if (characteristic.uuid === '2A00') {
// TODO: At some point addon should accept string.
this._setDeviceNameFromArray(characteristic.value, characteristic.writePerm, err => {
if (!err) {
characteristic.declarationHandle = 2;
characteristic.valueHandle = 3;
this._characteristics[characteristic.instanceId] = characteristic;
}
});
}
// TODO: Fix Appearance uuid magic number
if (characteristic.uuid === '2A01') {
this._setAppearanceFromArray(characteristic.value, err => {
if (!err) {
characteristic.declarationHandle = 4;
characteristic.valueHandle = 5;
this._characteristics[characteristic.instanceId] = characteristic;
}
});
}
// TODO: Fix Peripheral Preferred Connection Parameters uuid magic number
if (characteristic.uuid === '2A04') {
this._setPPCPFromArray(characteristic.value, err => {
if (!err) {
characteristic.declarationHandle = 6;
characteristic.valueHandle = 7;
this._characteristics[characteristic.instanceId] = characteristic;
}
});
}
}
};
// Create array of function objects to call in sequence.
var promises = [];
for (let service of services) {
var p;
if (service.uuid === '1800') {
service.startHandle = 1;
service.endHandle = 7;
applyGapServiceCharacteristics(service);
this._services[service.instanceId] = service;
continue;
} else if (service.uuid === '1801') {
service.startHandle = 8;
service.endHandle = 8;
this._services[service.instanceId] = service;
continue;
}
p = addService.bind(undefined, service, this._getServiceType(service));
promises.push(p);
if (service._factory_characteristics) {
for (let characteristic of service._factory_characteristics) {
p = addCharacteristic.bind(undefined, characteristic);
promises.push(p);
if (characteristic._factory_descriptors) {
for (let descriptor of characteristic._factory_descriptors) {
if (!this._converter.isSpecialUUID(descriptor.uuid)) {
p = addDescriptor.bind(undefined, descriptor);
promises.push(p);
}
}
}
}
}
}
// Execute the promises in sequence, start with an empty object that
// is propagated to all promises.
promiseSequencer(promises, {}).then(data => {
// TODO: Ierate over all servicses, descriptors, characterstics from parameter services
if (callback) { callback(); }
}).catch(err => {
this.emit('error', err);
if (callback) { callback(err); }
});
}
/**
* Get a `Service` instance by its instanceId.
*
* @param {string} serviceInstanceId The unique Id of this service.
* @returns {Service} The service.
*/
getService(serviceInstanceId) {
return this._services[serviceInstanceId];
}
/**
* Initiate or continue a GATT Primary Service Discovery procedure.
*
* @param {string} deviceInstanceId The device's unique Id.
* @param {function(Error, Service[])} [callback] Callback signature: (err, services) => {} where `services` is an
* array of `Service` instances corresponding to the discovered GATT
* primary services.
* @returns {void}
*/
getServices(deviceInstanceId, callback) {
// TODO: Implement something for when device is local
const device = this.getDevice(deviceInstanceId);
if (this._gattOperationsMap[device.instanceId]) {
this.emit('error', _makeError('Failed to get services, a GATT operation already in progress'));
return;
}
// TODO: Should we remove old services and do new discovery?
const alreadyFoundServices = _.filter(this._services, service => {
return deviceInstanceId === service.deviceInstanceId;
});
if (!_.isEmpty(alreadyFoundServices)) {
if (callback) { callback(undefined, alreadyFoundServices); }
return;
}
this._gattOperationsMap[device.instanceId] = { callback: callback, pendingHandleReads: {}, parent: device };
this._adapter.gattcDiscoverPrimaryServices(device.connectionHandle, 1, null, (err, services) => {
if (err) {
this.emit('error', _makeError('Failed to get services', err));
if (callback) { callback(err); }
return;
}
});
}
/**
* Get a `Characteristic` instance by its instanceId.
*
* @param {string} characteristicId The unique Id of this characteristic.
* @returns {Characteristic} The characteristic.
*/
getCharacteristic(characteristicId) {
return this._characteristics[characteristicId];
}
/**
* Initiate or continue a GATT Characteristic Discovery procedure.
*
*
* @param {string} serviceId Unique ID of of the GATT service.
* @param {function(Error, Characteristic[])} [callback] Callback signature: (err, characteristics) => {} where
* `characteristics` is an array of `Characteristic` instances
* corresponding to the discovered GATT characteristics attached to
* the service.
* @returns {void}
*/
getCharacteristics(serviceId, callback) {
// TODO: Implement something for when device is local
const service = this.getService(serviceId);
if (!service) {
throw new Error(_makeError('Failed to get characteristics.', 'Could not find service with id: ' + serviceId));
}
const device = this.getDevice(service.deviceInstanceId);
if (this._gattOperationsMap[device.instanceId]) {
this._checkAndPropagateError(undefined, 'Failed to get characteristics, a gatt operation already in progress', callback);
return;
}
const alreadyFoundCharacteristics = _.filter(this._characteristics, characteristic => {
return serviceId === characteristic.serviceInstanceId;
});
if (!_.isEmpty(alreadyFoundCharacteristics)) {
if (callback) { callback(undefined, alreadyFoundCharacteristics); }
return;
}
const handleRange = {
start_handle: service.startHandle,
end_handle: service.endHandle
};
this._gattOperationsMap[device.instanceId] = {
callback: callback,
pendingHandleReads: {},
parent: service
};
this._adapter.gattcDiscoverCharacteristics(device.connectionHandle, handleRange, err => {
if (this._checkAndPropagateError(err, 'Failed to get Characteristics', callback)) {
return;
}
});
}
/**
* Get a `Descriptor` instance by its instanceId.
*
* @param {string} descriptorId The unique Id of this descriptor.
* @returns {Descriptor} The descriptor.
*/
getDescriptor(descriptorId) {
return this._descriptors[descriptorId];
}
_isDescriptorPerConnectionBased(descriptor) {
return this._isCCCDDescriptor(descriptor.instanceId);
}
_setDescriptorValue(descriptor, value, deviceInstanceId) {
if (this._isDescriptorPerConnectionBased(descriptor)) {
descriptor.value[deviceInstanceId] = value;
} else {
descriptor.value = value;
}
}
_getDescriptorValue(descriptor, deviceInstanceId) {
if (this._isDescriptorPerConnectionBased(descriptor)) {
return descriptor.value[deviceInstanceId];
}
return descriptor.value;
}
_addDeviceToAllPerConnectionValues(deviceId) {
for (const descriptorInstanceId in this._descriptors) {
const descriptor = this._descriptors[descriptorInstanceId];
if (this._instanceIdIsOnLocalDevice(descriptorInstanceId) &&
this._isDescriptorPerConnectionBased(descriptor)) {
this._setDescriptorValue(descriptor, [0, 0], deviceId);
this.emit('descriptorValueChanged', descriptor);
}
}
}
_clearDeviceFromAllPerConnectionValues(deviceId) {
for (const descriptorInstanceId in this._descriptors) {
const descriptor = this._descriptors[descriptorInstanceId];
if (this._instanceIdIsOnLocalDevice(descriptorInstanceId) &&
this._isDescriptorPerConnectionBased(descriptor)) {
delete descriptor.value[deviceId];
this.emit('descriptorValueChanged', descriptor);
}
}
}
_clearDeviceFromDiscoveredServices(deviceId) {
this._services = this._filterObject(this._services, value => value.indexOf(deviceId) < 0);
this._characteristics = this._filterObject(this._characteristics, value => value.indexOf(deviceId) < 0);
this._descriptors = this._filterObject(this._descriptors, value => value.indexOf(deviceId) < 0);
}
_filterObject(collection, predicate) {
const newCollection = {};
for (let key in collection) {
if (predicate(key)) {
newCollection[key] = collection[key];
}
}
return newCollection;
}
/**
* Initiate or continue a GATT Characteristic Descriptor Discovery procedure.
*
* @param {string} characteristicId Unique ID of of the GATT characteristic.
* @param {function(Error, Descriptor[])} [callback] Callback signature: (err, descriptors) => {} where
* `descriptors` is an array of `Descriptor` instances corresponding to the
* discovered GATT descriptors attached to the characteristic.
* @returns {void}
*/
getDescriptors(characteristicId, callback) {
const characteristic = this.getCharacteristic(characteristicId);
const service = this.getService(characteristic.serviceInstanceId);
const device = this.getDevice(service.deviceInstanceId);
if (this._gattOperationsMap[device.instanceId]) {
this.emit('error', _makeError('Failed to get descriptors, a gatt operation already in progress', undefined));
return;
}
const alreadyFoundDescriptor = _.filter(this._descriptors, descriptor => {
return characteristicId === descriptor.characteristicInstanceId;
});
if (!_.isEmpty(alreadyFoundDescriptor)) {
if (callback) { callback(undefined, alreadyFoundDescriptor); }
return;
}
const handleRange = { start_handle: characteristic.valueHandle + 1, end_handle: service.endHandle };
this._gattOperationsMap[device.instanceId] = { callback, pendingHandleReads: {}, parent: characteristic };
this._adapter.gattcDiscoverDescriptors(device.connectionHandle, handleRange, err => {
//this._checkAndPropagateError('Failed to get descriptors', err, callback);
});
}
_getDescriptorsPromise() {
return (data, serviceId, characteristicId) => {
return new Promise((resolve, reject) => {
this.getDescriptors(
characteristicId, (error, descriptors) => {
if (error) {
reject(error);
return;
}
data.services[serviceId].characteristics[characteristicId].descriptors = descriptors;
resolve(data);
}
);
});
};
}
_getCharacteristicsPromise() {
return (data, service) => {
return new Promise((resolve, reject) => {
this.getCharacteristics(service.instanceId, (error, characteristics) => {
if (error) {
reject(error);
return;
}
data.services[service.instanceId].characteristics = {};
let promise = Promise.resolve(data);
for (let characteristic of characteristics) {
data.services[service.instanceId].characteristics[characteristic.instanceId] = characteristic;
promise = promise.then(data => {
return this._getDescriptorsPromise()(
data,
service.instanceId,
characteristic.instanceId);
});
}
promise.then(data => {
resolve(data);
}).catch(error => {
reject(error);
});
});
});
};
}
_getServicesPromise(deviceInstanceId) {
return new Promise((resolve, reject) => {
this.getServices(
deviceInstanceId,
(error, services) => {
if (error) {
reject(error);
return;
}
resolve(services);
});
});
}
/**
* Discovers information about a range of attributes on a GATT server.
*
* @param {string} deviceInstanceId The device's unique Id.
* @param {function(Error, Object)} [callback] Callback signature: (err, attributes) => {} where `attributes` contains
* the device's GATT attributes (services, characteristics and
* descriptors).
* @returns {void}
*/
getAttributes(deviceInstanceId, callback) {
let data = { 'services': {} };
this._getServicesPromise(deviceInstanceId).then(services => {
let p = Promise.resolve(data);
for (let service of services) {
data.services[service.instanceId] = service;
p = p.then(data => {
return this._getCharacteristicsPromise()(data, service);
});
}
return p;
})
.then(data => { if (callback) callback(undefined, data); })
.catch(error => { if (callback) callback(error); });
}
/**
* Reads the value of a GATT characteristic.
*
* @param {string} characteristicId Unique ID of of the GATT characteristic.
* @param {function(Error, number[])} [callback] Callback signature: (err, readBytes) => {} where `readBytes` is an
* array of numbers corresponding to the value of the GATT
* characteristic.
* @returns {void}
*/
readCharacteristicValue(characteristicId, callback) {
const characteristic = this.getCharacteristic(characteristicId);
if (!characteristic) {
throw new Error('Characteristic value read failed: Could not get characteristic with id ' + characteristicId);
}
if (this._instanceIdIsOnLocalDevice(characteristicId)) {
this._readLocalValue(characteristic, callback);
return;
}
const device = this._getDeviceByCharacteristicId(characteristicId);
if (!device) {
throw new Error('Characteristic value read failed: Could not get device');
}
if (this._gattOperationsMap[device.instanceId]) {
throw new Error('Characteristic value read failed: A gatt operation already in progress with device id ' + device.instanceId);
}
this._gattOperationsMap[device.instanceId] = { callback: callback, readBytes: [] };
this._adapter.gattcRead(device.connectionHandle, characteristic.valueHandle, 0, err => {
if (err) {
this.emit('error', _makeError('Read characteristic value failed', err));
}
});
}
/**
* Writes the value of a GATT characteristic.
*
* @param {string} characteristicId Unique ID of the GATT characteristic.
* @param {array} value The value (array of bytes) to be written.
* @param {boolean} ack Require acknowledge from device, irrelevant in GATTS role.
* @param {function(Error)} completeCallback Callback signature: err => {}
* @param {function} deviceNotifiedOrIndicated TODO
* @returns {void}
*/
writeCharacteristicValue(characteristicId, value, ack, completeCallback, deviceNotifiedOrIndicated) {
const characteristic = this.getCharacteristic(characteristicId);
if (!characteristic) {
throw new Error('Characteristic value write failed: Could not get characteristic with id ' + characteristicId);
}
if (this._instanceIdIsOnLocalDevice(characteristicId)) {
this._writeLocalValue(characteristic, value, 0, completeCallback, deviceNotifiedOrIndicated);
return;
}
const device = this._getDeviceByCharacteristicId(characteristicId);
if (!device) {
throw new Error('Characteristic value write failed: Could not get device');
}
if (this._gattOperationsMap[device.instanceId]) {
throw new Error('Characteristic value write failed: A gatt operation already in progress with device id ' + device.instanceId);
}
this._gattOperationsMap[device.instanceId] = { callback: completeCallback, bytesWritten: 0, value: value.slice(), attribute: characteristic };
if (value.length > this._maxShortWritePayloadSize(device.instanceId)) {
if (!ack) {
delete this._gattOperationsMap[device.instanceId];
throw new Error('Long writes do not support BLE_GATT_OP_WRITE_CMD');
}
this._gattOperationsMap[device.instanceId].bytesWritten = this._maxLongWritePayloadSize(device.instanceId);
this._longWrite(device, characteristic, value, completeCallback);
} else {
this._gattOperationsMap[device.instanceId].bytesWritten = value.length;
this._shortWrite(device, characteristic, value, ack, completeCallback);
}
}
_getDeviceByDescriptorId(descriptorId) {
const descriptor = this._descriptors[descriptorId];
if (!descriptor) {
throw new Error('No descriptor found with descriptor id: ' + descriptorId);
}
return this._getDeviceByCharacteristicId(descriptor.characteristicInstanceId);
}
_getDeviceByCharacteristicId(characteristicId) {
const characteristic = this._characteristics[characteristicId];
if (!characteristic) {
throw new Error('No characteristic found with id: ' + characteristicId);
}
const service = this._services[characteristic.serviceInstanceId];
if (!service) {
throw new Error('No service found with id: ' + characteristic.serviceInstanceId);
}
const device = this._devices[service.deviceInstanceId];
if (!device) {
throw new Error('No device found with id: ' + service.deviceInstanceId);
}
return device;
}
_isCCCDDescriptor(descriptorId) {
const descriptor = this._descriptors[descriptorId];
return descriptor &&
((descriptor.uuid === '0000290200001000800000805F9B34FB') ||
(descriptor.uuid === '2902'));
}
_getCCCDOfCharacteristic(characteristicId) {
return _.find(this._descriptors, descriptor => {
return (descriptor.characteristicInstanceId === characteristicId) &&
(this._isCCCDDescriptor(descriptor.instanceId));
});
}
_instanceIdIsOnLocalDevice(instanceId) {
return instanceId.split('.')[0] === 'local';
}
/**
* Reads the value of a GATT descriptor.
*
* @param {string} descriptorId Unique ID of of the GATT descriptor.
* @param {function(Error, number[])} [callback] Callback signature: (err, readBytes) => {} where `readBytes` is an
* array of numbers corresponding to the value of the GATT
* descriptor.
* @returns {void}
*/
readDescriptorValue(descriptorId, callback) {
const descriptor = this.getDescriptor(descriptorId);
if (!descriptor) {
throw new Error('Descriptor read failed: could not get descriptor with id ' + descriptorId);
}
if (this._instanceIdIsOnLocalDevice(descriptorId)) {
this._readLocalValue(descriptor, callback);
return;
}
const device = this._getDeviceByDescriptorId(descriptorId);
if (!device) {
throw new Error('Descriptor read failed: Could not get device');
}
if (this._gattOperationsMap[device.instanceId]) {
throw new Error('Descriptor read failed: A gatt operation already in progress with device with id ' + device.instanceId);
}
this._gattOperationsMap[device.instanceId] = { callback: callback, readBytes: [] };
this._adapter.gattcRead(device.connectionHandle, descriptor.handle, 0, err => {
if (err) {
this.emit('error', _makeError('Read descriptor value failed', err));
}
});
}
/**
* Writes the value of a GATT descriptor.
*
* @param {string} descriptorId Unique ID of the GATT descriptor.
* @param {array} value The value (array of bytes) to be written.
* @param {boolean} ack Require acknowledge from device, irrelevant in GATTS role.
* @param {function(Error)} [callback] Callback signature: err => {}.
* (not called until ack is received if `requireAck`).
* options: {ack, long, offset}
* @returns {void}
*/
writeDescriptorValue(descriptorId, value, ack, callback) {
// Does not support reliable write
const descriptor = this.getDescriptor(descriptorId);
if (!descriptor) {
throw new Error('Descriptor write failed: could not get descriptor with id ' + descriptorId);
}
if (this._instanceIdIsOnLocalDevice(descriptorId)) {
this._writeLocalValue(descriptor, value, 0, callback);
return;
}
const device = this._getDeviceByDescriptorId(descriptorId);
if (!device) {
throw new Error('Descriptor write failed: Could not get device');
}
if (this._gattOperationsMap[device.instanceId]) {
throw new Error('Descriptor write failed: A gatt operation already in progress with device with id ' + device.instanceId);
}
this._gattOperationsMap[device.instanceId] = { callback: callback, bytesWritten: 0, value: value.slice(), attribute: descriptor };
if (value.length > this._maxShortWritePayloadSize(device.instanceId)) {
if (!ack) {
delete this._gattOperationsMap[device.instanceId];
throw new Error('Long writes do not support BLE_GATT_OP_WRITE_CMD');
}
this._gattOperationsMap[device.instanceId].bytesWritten = this._maxLongWritePayloadSize(device.instanceId);
this._longWrite(device, descriptor, value, callback);
} else {
this._gattOperationsMap[device.instanceId].bytesWritten = value.length;
this._shortWrite(device, descriptor, value, ack, callback);
}
}
_shortWrite(device, attribute, value, ack, callback) {
const writeParameters = {
write_op: ack ? this._bleDriver.BLE_GATT_OP_WRITE_REQ : this._bleDriver.BLE_GATT_OP_WRITE_CMD,
flags: 0, // don't care for WRITE_REQ / WRITE_CMD
handle: attribute.handle,
offset: 0,
len: value.length,
value,
};
Promise.resolve()
.then(() => {
if (ack) {
return this._shortWriteWithResponse(device, writeParameters);
}
return this._shortWriteWithoutResponse(device, writeParameters)
.then(() => {
delete this._gattOperationsMap[device.instanceId];
attribute.value = value;
if (callback) { callback(undefined, attribute); }
});
})
.catch(err => {
delete this._gattOperationsMap[device.instanceId];
const error = _makeError(`Failed to write to attribute with handle: ${attribute.handle}: ${err.message}`);
this.emit('error', error);
if (callback) callback(error);
});
}
_shortWriteWithResponse(device, writeParameters) {
return new Promise((resolve, reject) => {
this._adapter.gattcWrite(device.connectionHandle, writeParameters, err => {
if (err) {
reject(err);
} else {
resolve();
}
});
});
}
_shortWriteWithoutResponse(device, writeParameters) {
let timeoutId;
return Promise.race([
new Promise((resolve, reject) => {
const txCompleteHandler = txCompleteDevice => {
if (device.connectionHandle === txCompleteDevice.connectionHandle) {
this.removeListener('txComplete', txCompleteHandler);
clearTimeout(timeoutId);
resolve();
}
};
this.on('txComplete', txCompleteHandler);
this._adapter.gattcWrite(device.connectionHandle, writeParameters, err => {
if (err) reject(err);
});
}),
new Promise((resolve, reject) => {
timeoutId = setTimeout(() => {
reject(_makeError('Timed out while waiting for BLE_EVT_TX_COMPLETE'));
}, 4000);
}),
]);
}
_longWrite(device, attribute, value, callback) {
if (value.length < this._maxShortWritePayloadSize(device.instanceId)) {
throw new Error('Wrong write method. Use regular write for payload sizes < ' + this._maxShortWritePayloadSize(device.instanceId));
}
const writeParameters = {
write_op: this._bleDriver.BLE_GATT_OP_PREP_WRITE_REQ,
flags: this._bleDriver.BLE_GATT_EXEC_WRITE_FLAG_PREPARED_WRITE,
handle: attribute.handle,
offset: 0,
len: this._maxLongWritePayloadSize(device.instanceId),
value: value.slice(0, this._maxLongWritePayloadSize(device.instanceId)),
};
this._adapter.gattcWrite(device.connectionHandle, writeParameters, err => {
if (err) {
this._longWriteCancel(device, attribute);
this.emit('error', _makeError('Failed to write value to device/handle ' + device.instanceId + '/' + attribute.handle, err));
return;
}
});
}
_longWriteCancel(device, attribute) {
const gattOperation = this._gattOperationsMap[device.instanceId];
const writeParameters = {
write_op: this._bleDriver.BLE_GATT_OP_EXEC_WRITE_REQ,
flags: this._bleDriver.BLE_GATT_EXEC_WRITE_FLAG_PREPARED_CANCEL,
handle: attribute.handle,
offset: 0,
len: 0,
value: [],
};
this._adapter.gattcWrite(device.connectionHandle, writeParameters, err => {
delete this._gattOperationsMap[device.instanceId];
if (err) {
this.emit('error', _makeError('Failed to cancel failed long write', err));
gattOperation.callback('Failed to write and failed to cancel write');
} else {
gattOperation.callback('Failed to write value to device/handle ' + device.instanceId + '/' + attribute.handle);
}
});
}
_sendingNotificationsAndIndicationsComplete() {
return this._pendingNotificationsAndIndications.sentAllNotificationsAndIndications &&
this._pendingNotificationsAndIndications.remainingNotificationCallbacks === 0 &&
this._pendingNotificationsAndIndications.remainingIndicationConfirmations === 0;
}
_writeLocalValue(attribute, value, offset, completeCallback, deviceNotifiedOrIndicated) {
const writeParameters = {
len: value.length,
offset: offset,
value: value,
};
if (!this._instanceIdIsOnLocalDevice(attribute.instanceId)) {
this.emit('error', _makeError('Attribute was not a local attribute'));
return;
}
// TODO: Do we know that the attributes are the correct attributes?
if (attribute.uuid === '2A00') {
// TODO: At some point addon should accept string.
// TODO: Fix write perm to be same as set at server setup.
this._setDeviceNameFromArray(value, ['open'], err => {
if (err) {
completeCallback(err);
}
attribute.value = value;
completeCallback(undefined, attribute);
});
return;
}
// TODO: Fix Appearance uuid magic number
if (attribute.uuid === '2A01') {
this._setAppearanceFromArray(value, err => {
if (err) {
completeCallback(err);
}
attribute.value = value;
completeCallback(undefined, attribute);
});
return;
}
// TODO: Fix Peripheral Preferred Connection Parameters uuid magic number
if (attribute.uuid === '2A04') {
this._setPPCPFromArray(value, err => {
if (err) {
completeCallback(err);
}
attribute.value = value;
completeCallback(undefined, attribute);
});
return;
}
// TODO: Figure out if we should use hvx?
const cccdDescriptor = this._getCCCDOfCharacteristic(attribute.instanceId);
let sentHvx = false;
if (cccdDescriptor) {
// TODO: This is probably way to simple, do we need a map of devices indication is sent to?
this._pendingNotificationsAndIndications = {
completeCallback,
deviceNotifiedOrIndicated,
sentAllNotificationsAndIndications: false,
remainingNotificationCallbacks: 0,
remainingIndicationConfirmations: 0,
};
for (let deviceInstanceId in this._devices) {
const cccdValue = cccdDescriptor.value[deviceInstanceId][0];
const sendIndication = cccdValue & 2;
const sendNotification = !sendIndication && (cccdValue & 1);
if (sendNotification || sendIndication) {
const device = this._devices[deviceInstanceId];
const hvxParams = {
handle: attribute.valueHandle,
type: sendIndication || sendNotification,
offset: offset,
len: value.length,
data: value,
};
sentHvx = true;
if (sendNotification) {
this._pendingNotificationsAndIndications.remainingNotificationCallbacks++;
} else if (sendIndication) {
this._pendingNotificationsAndIndications.remainingIndicationConfirmations++;
}
this._adapter.gattsHVX(device.connectionHandle, hvxParams, err => {
if (err) {
if (sendNotification) {
this._pendingNotificationsAndIndications.remainingNotificationCallbacks--;
} else if (sendIndication) {
this._pendingNotificationsAndIndications.remainingIndicationConfirmations--;
}
this.emit('error', _makeError('Failed to send notification', err));
if (this._sendingNotificationsAndIndicationsComplete()) {
completeCallback(_makeError('Failed to send notification or indication', err));
this._pendingNotificationsAndIndications = {};
}
return;
}
this._setAttributeValueWithOffset(attribute, value, offset);
if (sendNotification) {
if (deviceNotifiedOrIndicated) {
deviceNotifiedOrIndicated(device, attribute);
}
this.emit('deviceNotifiedOrIndicated', device, attribute);
this._pendingNotificationsAndIndications.remainingNotificationCallbacks--;
if (this._sendingNotificationsAndIndicationsComplete()) {
completeCallback(undefined);
this._pendingNotificationsAndIndications = {};
}
} else if (sendIndication) {
return;
}
});
}
}
this._pendingNotificationsAndIndications.sentAllNotificationsAndIndications = true;
}
if (sentHvx) {
if (this._sendingNotificationsAndIndicationsComplete()) {
completeCallback(undefined);
this._pendingNotificationsAndIndications = {};
}
return;
}
this._adapter.gattsSetValue(this._bleDriver.BLE_CONN_HANDLE_INVALID, attribute.handle, writeParameters, (err, writeResult) => {
if (err) {
this.emit('error', _makeError('Failed to write local value', err));
completeCallback(err, undefined);
return;
}
this._setAttributeValueWithOffset(attribute, value, offset);
completeCallback(undefined, attribute);
});
}
_readLocalValue(attribute, callback) {
const readParameters = {
len: 512,
offset: 0,
value: [],
};
this._adapter.gattsGetValue(this._bleDriver.BLE_CONN_HANDLE_INVALID, attribute, readParameters, (err, readResults) => {
if (err) {
this.emit('error', _makeError('Failed to write local value', err));
if (callback) callback(err, undefined);
return;
}
attribute.value = readResults.value;
if (callback) { callback(undefined, attribute); }
});
}
/**
* Starts notifications on a GATT characteristic.
*
* Only for GATT central role.
*
* @param {string} characteristicId Unique ID of the GATT characteristic.
* @param {boolean} requireAck Require all notifications to ack.
* @param {function(Error)} [callback] Callback signature: err => {}.
* (not called until ack is received if `requireAck`).
* @returns {void}
*/
startCharacteristicsNotifications(characteristicId, requireAck, callback) {
// TODO: If CCCD not discovered do a decriptor discovery
const enableNotificationBitfield = requireAck ? 2 : 1;
const characteristic = this._characteristics[characteristicId];
if (!characteristic) {
throw new Error('Start characteristic notifications failed: Could not get characteristic with id ' + characteristicId);
}
const cccdDescriptor = this._getCCCDOfCharacteristic(characteristicId);
if (!cccdDescriptor) {
throw new Error('Start characteristic notifications failed: Could not find CCCD descriptor with parent characteristic id: ' + characteristicId);
}
this.writeDescriptorValue(cccdDescriptor.instanceId, [enableNotificationBitfield, 0], true, err => {
if (err) {
this.emit('error', 'Failed to start characteristics notifications');
}
if (callback) { callback(err); }
});
}
/**
* Disables notifications on a GATT characteristic.
*
* @param {string} characteristicId Unique ID of the GATT characteristic.
* @param {function(Error)} [callback] Callback signature: err => {}.
* @returns {void}
*/
stopCharacteristicsNotifications(characteristicId, callback) {
// TODO: If CCCD not discovered how did we start it?
const disableNotificationBitfield = 0;
const characteristic = this._characteristics[characteristicId];
if (!characteristic) {
throw new Error('Stop characteristic notifications failed: Could not get characteristic with id ' + characteristicId);
}
const cccdDescriptor = this._getCCCDOfCharacteristic(characteristicId);
if (!cccdDescriptor) {
throw new Error('Stop characteristic notifications failed: Could not find CCCD descriptor with parent characteristic id: ' + characteristicId);
}
this.writeDescriptorValue(cccdDescriptor.instanceId, [disableNotificationBitfield, 0], true, err => {
if (err) {
this.emit('error', 'Failed to stop characteristics notifications');
}
if (callback) { callback(err); }
});
}
phyUpdate(deviceInstanceId, phys, callback) {
const device = this.getDevice(deviceInstanceId);
if (!device) {
throw new Error('No device with instance id: ' + deviceInstanceId);
}
this._adapter.gapPhyUpdate(device.connectionHandle, phys, err => {
if (err) {
const errorObject = _makeError('Failed to update phys', err);
this.emit('error', errorObject);
if (callback) { callback(errorObject); }
return;
}
if (callback) { callback(); }
});
}
dataLengthUpdate(deviceInstanceId, params, callback) {
const device = this.getDevice(deviceInstanceId);
if (!device) {
throw new Error('No device with instance id: ' + deviceInstanceId);
}
this._adapter.gapDataLengthUpdate(device.connectionHandle, params, err => {
if (err) {
const errorObject = _makeError('Failed to update data length', err);
this.emit('error', errorObject);
if (callback) { callback(errorObject); }
return;
}
if (callback) { callback(); }
});
}
}
module.exports = Adapter;