647 lines
20 KiB
JavaScript
Executable File
647 lines
20 KiB
JavaScript
Executable File
import browser from 'browser-detect';
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import BaseAudioBridge from './base';
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import logger from '/imports/startup/client/logger';
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import { fetchStunTurnServers } from '/imports/utils/fetchStunTurnServers';
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import {
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isUnifiedPlan, toUnifiedPlan, toPlanB, stripMDnsCandidates, analyzeSdp,
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} from '/imports/utils/sdpUtils';
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const MEDIA = Meteor.settings.public.media;
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const MEDIA_TAG = MEDIA.mediaTag;
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const CALL_TRANSFER_TIMEOUT = MEDIA.callTransferTimeout;
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const CALL_HANGUP_TIMEOUT = MEDIA.callHangupTimeout;
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const CALL_HANGUP_MAX_RETRIES = MEDIA.callHangupMaximumRetries;
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const RELAY_ONLY_ON_RECONNECT = MEDIA.relayOnlyOnReconnect;
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const IPV4_FALLBACK_DOMAIN = Meteor.settings.public.app.ipv4FallbackDomain;
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const ICE_NEGOTIATION_FAILED = ['iceConnectionFailed'];
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const CALL_CONNECT_TIMEOUT = 20000;
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const ICE_NEGOTIATION_TIMEOUT = 20000;
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const AUDIO_SESSION_NUM_KEY = 'AudioSessionNumber';
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const getAudioSessionNumber = () => {
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let currItem = parseInt(sessionStorage.getItem(AUDIO_SESSION_NUM_KEY), 10);
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if (!currItem) {
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currItem = 0;
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}
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currItem += 1;
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sessionStorage.setItem(AUDIO_SESSION_NUM_KEY, currItem);
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return currItem;
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};
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class SIPSession {
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constructor(user, userData, protocol, hostname,
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baseCallStates, baseErrorCodes, reconnectAttempt) {
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this.user = user;
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this.userData = userData;
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this.protocol = protocol;
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this.hostname = hostname;
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this.baseCallStates = baseCallStates;
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this.baseErrorCodes = baseErrorCodes;
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this.reconnectAttempt = reconnectAttempt;
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}
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static parseDTMF(message) {
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const parse = message.match(/Signal=(.)/);
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if (parse && parse.length === 2) {
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return parse[1];
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}
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return '';
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}
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joinAudio({ isListenOnly, extension, inputStream }, managerCallback) {
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return new Promise((resolve, reject) => {
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const callExtension = extension ? `${extension}${this.userData.voiceBridge}` : this.userData.voiceBridge;
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const callback = (message) => {
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// There will sometimes we erroneous errors put out like timeouts and improper shutdowns,
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// but only the first error ever matters
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if (this.alreadyErrored) {
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logger.info({
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logCode: 'sip_js_absorbing_callback_message',
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extraInfo: { message },
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}, 'Absorbing a redundant callback message.');
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return;
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}
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if (message.status === this.baseCallStates.failed) {
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this.alreadyErrored = true;
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}
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managerCallback(message).then(resolve);
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};
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this.callback = callback;
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// If there's an extension passed it means that we're joining the echo test first
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this.inEchoTest = !!extension;
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return this.doCall({ callExtension, isListenOnly, inputStream })
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.catch((reason) => {
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reject(reason);
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});
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});
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}
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doCall(options) {
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const {
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isListenOnly,
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} = options;
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const {
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userId,
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name,
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sessionToken,
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} = this.user;
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const callerIdName = [
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`${userId}_${getAudioSessionNumber()}`,
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'bbbID',
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isListenOnly ? `LISTENONLY-${name}` : name,
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].join('-').replace(/"/g, "'");
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this.user.callerIdName = callerIdName;
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this.callOptions = options;
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return fetchStunTurnServers(sessionToken)
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.then(this.createUserAgent.bind(this))
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.then(this.inviteUserAgent.bind(this))
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.then(this.setupEventHandlers.bind(this));
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}
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transferCall(onTransferSuccess) {
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return new Promise((resolve, reject) => {
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this.inEchoTest = false;
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const timeout = setInterval(() => {
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clearInterval(timeout);
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logger.error({ logCode: 'sip_js_transfer_timed_out' }, 'Timeout on transferring from echo test to conference');
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this.callback({
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status: this.baseCallStates.failed,
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error: 1008,
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bridgeError: 'Timeout on call transfer',
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});
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this.exitAudio();
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reject(this.baseErrorCodes.REQUEST_TIMEOUT);
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}, CALL_TRANSFER_TIMEOUT);
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// This is is the call transfer code ask @chadpilkey
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this.currentSession.dtmf(1);
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this.currentSession.on('dtmf', (event) => {
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if (event.body && (typeof event.body === 'string')) {
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const key = SIPSession.parseDTMF(event.body);
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if (key === '7') {
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clearInterval(timeout);
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onTransferSuccess();
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resolve();
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}
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}
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});
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});
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}
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exitAudio() {
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return new Promise((resolve, reject) => {
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let hangupRetries = 0;
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let hangup = false;
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const { mediaHandler } = this.currentSession;
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this.userRequestedHangup = true;
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// Removing termination events to avoid triggering an error
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ICE_NEGOTIATION_FAILED.forEach(e => mediaHandler.off(e));
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const tryHangup = () => {
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if (this.currentSession.endTime) {
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hangup = true;
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return resolve();
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}
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this.currentSession.bye();
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this.userAgent.stop();
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hangupRetries += 1;
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setTimeout(() => {
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if (hangupRetries > CALL_HANGUP_MAX_RETRIES) {
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this.callback({
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status: this.baseCallStates.failed,
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error: 1006,
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bridgeError: 'Timeout on call hangup',
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});
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return reject(this.baseErrorCodes.REQUEST_TIMEOUT);
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}
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if (!hangup) return tryHangup();
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return resolve();
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}, CALL_HANGUP_TIMEOUT);
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};
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this.currentSession.on('bye', () => {
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hangup = true;
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resolve();
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});
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return tryHangup();
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});
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}
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createUserAgent({ stun, turn }) {
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return new Promise((resolve, reject) => {
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const {
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hostname,
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protocol,
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} = this;
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const {
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callerIdName,
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} = this.user;
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// WebView safari needs a transceiver to be added. Made it a SIP.js hack.
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// Don't like the UA picking though, we should straighten everything to user
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// transceivers - prlanzarin 2019/05/21
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const browserUA = window.navigator.userAgent.toLocaleLowerCase();
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const isSafariWebview = ((browserUA.indexOf('iphone') > -1
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|| browserUA.indexOf('ipad') > -1) && browserUA.indexOf('safari') === -1);
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// Second UA check to get all Safari browsers to enable Unified Plan <-> PlanB
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// translation
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const isSafari = browser().name === 'safari';
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logger.debug({ logCode: 'sip_js_creating_user_agent' }, 'Creating the user agent');
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if (this.userAgent && this.userAgent.isConnected()) {
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if (this.userAgent.configuration.hostPortParams === this.hostname) {
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logger.debug({ logCode: 'sip_js_reusing_user_agent' }, 'Reusing the user agent');
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resolve(this.userAgent);
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return;
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}
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logger.debug({ logCode: 'sip_js_different_host_name' }, 'Different host name. need to kill');
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}
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const localSdpCallback = (sdp) => {
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// For now we just need to call the utils function to parse and log the different pieces.
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// In the future we're going to want to be tracking whether there were TURN candidates
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// and IPv4 candidates to make informed decisions about what to do on fallbacks/reconnects.
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analyzeSdp(sdp);
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};
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let userAgentConnected = false;
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this.userAgent = new window.SIP.UA({
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uri: `sip:${encodeURIComponent(callerIdName)}@${hostname}`,
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wsServers: `${(protocol === 'https:' ? 'wss://' : 'ws://')}${hostname}/ws`,
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displayName: callerIdName,
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register: false,
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traceSip: true,
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autostart: false,
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userAgentString: 'BigBlueButton',
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stunServers: stun,
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turnServers: turn,
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hackPlanBUnifiedPlanTranslation: isSafari,
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hackAddAudioTransceiver: isSafariWebview,
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relayOnlyOnReconnect: this.reconnectAttempt && RELAY_ONLY_ON_RECONNECT,
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localSdpCallback,
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});
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const handleUserAgentConnection = () => {
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userAgentConnected = true;
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resolve(this.userAgent);
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};
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const handleUserAgentDisconnection = () => {
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if (this.userAgent) {
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this.userAgent.removeAllListeners();
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this.userAgent.stop();
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this.userAgent = null;
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}
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let error;
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let bridgeError;
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if (this.userRequestedHangup) return;
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if (userAgentConnected) {
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error = 1001;
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bridgeError = 'Websocket disconnected';
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} else {
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error = 1002;
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bridgeError = 'Websocket failed to connect';
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}
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this.callback({
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status: this.baseCallStates.failed,
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error,
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bridgeError,
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});
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reject(this.baseErrorCodes.CONNECTION_ERROR);
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};
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this.userAgent.on('connected', handleUserAgentConnection);
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this.userAgent.on('disconnected', handleUserAgentDisconnection);
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this.userAgent.start();
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});
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}
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inviteUserAgent(userAgent) {
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const {
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hostname,
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} = this;
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const {
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inputStream,
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callExtension,
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} = this.callOptions;
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const options = {
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media: {
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stream: inputStream,
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constraints: {
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audio: true,
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video: false,
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},
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render: {
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remote: document.querySelector(MEDIA_TAG),
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},
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},
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RTCConstraints: {
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offerToReceiveAudio: true,
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offerToReceiveVideo: false,
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},
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};
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return userAgent.invite(`sip:${callExtension}@${hostname}`, options);
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}
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setupEventHandlers(currentSession) {
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return new Promise((resolve) => {
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const { mediaHandler } = currentSession;
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let iceCompleted = false;
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let fsReady = false;
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this.currentSession = currentSession;
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let connectionCompletedEvents = ['iceConnectionCompleted', 'iceConnectionConnected'];
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// Edge sends a connected first and then a completed, but the call isn't ready until
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// the completed comes in. Due to the way that we have the listeners set up, the only
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// way to ignore one status is to not listen for it.
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if (browser().name === 'edge') {
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connectionCompletedEvents = ['iceConnectionCompleted'];
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}
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const checkIfCallReady = () => {
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if (iceCompleted && fsReady) {
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this.webrtcConnected = true;
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this.callback({ status: this.baseCallStates.started });
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resolve();
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}
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};
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// Sometimes FreeSWITCH just won't respond with anything and hangs. This timeout is to
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// avoid that issue
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const callTimeout = setTimeout(() => {
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this.callback({
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status: this.baseCallStates.failed,
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error: 1006,
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bridgeError: `Call timed out on start after ${CALL_CONNECT_TIMEOUT / 1000}s`,
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});
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this.exitAudio();
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}, CALL_CONNECT_TIMEOUT);
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let iceNegotiationTimeout;
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const handleSessionAccepted = () => {
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logger.info({ logCode: 'sip_js_session_accepted' }, 'Audio call session accepted');
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clearTimeout(callTimeout);
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currentSession.off('accepted', handleSessionAccepted);
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// If ICE isn't connected yet then start timeout waiting for ICE to finish
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if (!iceCompleted) {
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iceNegotiationTimeout = setTimeout(() => {
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this.callback({
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status: this.baseCallStates.failed,
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error: 1010,
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bridgeError: `ICE negotiation timeout after ${ICE_NEGOTIATION_TIMEOUT / 1000}s`,
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});
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this.exitAudio();
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}, ICE_NEGOTIATION_TIMEOUT);
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}
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};
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currentSession.on('accepted', handleSessionAccepted);
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const handleSessionProgress = (update) => {
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logger.info({ logCode: 'sip_js_session_progress' }, 'Audio call session progress update');
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clearTimeout(callTimeout);
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currentSession.off('progress', handleSessionProgress);
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};
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currentSession.on('progress', handleSessionProgress);
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const handleConnectionCompleted = (peer) => {
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logger.info({
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logCode: 'sip_js_ice_connection_success',
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extraInfo: { currentState: peer.iceConnectionState },
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}, `ICE connection success. Current state - ${peer.iceConnectionState}`);
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clearTimeout(callTimeout);
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clearTimeout(iceNegotiationTimeout);
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connectionCompletedEvents.forEach(e => mediaHandler.off(e, handleConnectionCompleted));
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iceCompleted = true;
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checkIfCallReady();
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};
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connectionCompletedEvents.forEach(e => mediaHandler.on(e, handleConnectionCompleted));
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const handleSessionTerminated = (message, cause) => {
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clearTimeout(callTimeout);
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clearTimeout(iceNegotiationTimeout);
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currentSession.off('terminated', handleSessionTerminated);
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if (!message && !cause && !!this.userRequestedHangup) {
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return this.callback({
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status: this.baseCallStates.ended,
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});
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}
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logger.error({
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logCode: 'sip_js_call_terminated',
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extraInfo: { cause },
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}, `Audio call terminated. cause=${cause}`);
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let mappedCause;
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if (!iceCompleted) {
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mappedCause = '1004';
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} else {
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mappedCause = '1005';
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}
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return this.callback({
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status: this.baseCallStates.failed,
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error: mappedCause,
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bridgeError: cause,
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});
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};
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currentSession.on('terminated', handleSessionTerminated);
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const handleIceNegotiationFailed = (peer) => {
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if (iceCompleted) {
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logger.error({ logCode: 'sipjs_ice_failed_after' }, 'ICE connection failed after success');
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} else {
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logger.error({ logCode: 'sipjs_ice_failed_before' }, 'ICE connection failed before success');
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}
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clearTimeout(callTimeout);
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clearTimeout(iceNegotiationTimeout);
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ICE_NEGOTIATION_FAILED.forEach(e => mediaHandler.off(e, handleIceNegotiationFailed));
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this.callback({
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status: this.baseCallStates.failed,
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error: 1007,
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bridgeError: `ICE negotiation failed. Current state - ${peer.iceConnectionState}`,
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});
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};
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ICE_NEGOTIATION_FAILED.forEach(e => mediaHandler.on(e, handleIceNegotiationFailed));
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const handleIceConnectionTerminated = (peer) => {
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['iceConnectionClosed'].forEach(e => mediaHandler.off(e, handleIceConnectionTerminated));
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if (!this.userRequestedHangup) {
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logger.error({ logCode: 'sipjs_ice_closed' }, 'ICE connection closed');
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}
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/*
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this.callback({
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status: this.baseCallStates.failed,
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error: 1012,
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bridgeError: "ICE connection closed. Current state - " + peer.iceConnectionState,
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});
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*/
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};
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['iceConnectionClosed'].forEach(e => mediaHandler.on(e, handleIceConnectionTerminated));
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const inEchoDTMF = (event) => {
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if (event.body && typeof event.body === 'string') {
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const dtmf = SIPSession.parseDTMF(event.body);
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if (dtmf === '0') {
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fsReady = true;
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checkIfCallReady();
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}
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}
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currentSession.off('dtmf', inEchoDTMF);
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};
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currentSession.on('dtmf', inEchoDTMF);
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});
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}
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}
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export default class SIPBridge extends BaseAudioBridge {
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constructor(userData) {
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super(userData);
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const {
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userId,
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username,
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sessionToken,
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} = userData;
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this.user = {
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userId,
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sessionToken,
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name: username,
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};
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this.media = {
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inputDevice: {},
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};
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this.protocol = window.document.location.protocol;
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this.hostname = window.document.location.hostname;
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// SDP conversion utilitary methods to be used inside SIP.js
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window.isUnifiedPlan = isUnifiedPlan;
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window.toUnifiedPlan = toUnifiedPlan;
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window.toPlanB = toPlanB;
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window.stripMDnsCandidates = stripMDnsCandidates;
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}
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joinAudio({ isListenOnly, extension, inputStream }, managerCallback) {
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const hasFallbackDomain = typeof IPV4_FALLBACK_DOMAIN === 'string' && IPV4_FALLBACK_DOMAIN !== '';
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return new Promise((resolve, reject) => {
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let { hostname } = this;
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this.activeSession = new SIPSession(this.user, this.userData, this.protocol,
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hostname, this.baseCallStates, this.baseErrorCodes, false);
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const callback = (message) => {
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if (message.status === this.baseCallStates.failed) {
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let shouldTryReconnect = false;
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// Try and get the call to clean up and end on an error
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this.activeSession.exitAudio().catch(() => {});
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if (this.activeSession.webrtcConnected) {
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// webrtc was able to connect so just try again
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message.silenceNotifications = true;
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callback({ status: this.baseCallStates.reconnecting });
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shouldTryReconnect = true;
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} else if (hasFallbackDomain === true && hostname !== IPV4_FALLBACK_DOMAIN) {
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message.silenceNotifications = true;
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logger.info({ logCode: 'sip_js_attempt_ipv4_fallback' }, 'Attempting to fallback to IPv4 domain for audio');
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hostname = IPV4_FALLBACK_DOMAIN;
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shouldTryReconnect = true;
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}
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if (shouldTryReconnect) {
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const fallbackExtension = this.activeSession.inEchoTest ? extension : undefined;
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this.activeSession = new SIPSession(this.user, this.userData, this.protocol,
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hostname, this.baseCallStates, this.baseErrorCodes, true);
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this.activeSession.joinAudio({ isListenOnly, extension: fallbackExtension, inputStream }, callback)
|
|
.then((value) => {
|
|
resolve(value);
|
|
}).catch((reason) => {
|
|
reject(reason);
|
|
});
|
|
}
|
|
}
|
|
|
|
return managerCallback(message);
|
|
};
|
|
|
|
this.activeSession.joinAudio({ isListenOnly, extension, inputStream }, callback)
|
|
.then((value) => {
|
|
resolve(value);
|
|
}).catch((reason) => {
|
|
reject(reason);
|
|
});
|
|
});
|
|
}
|
|
|
|
transferCall(onTransferSuccess) {
|
|
return this.activeSession.transferCall(onTransferSuccess);
|
|
}
|
|
|
|
exitAudio() {
|
|
return this.activeSession.exitAudio();
|
|
}
|
|
|
|
setDefaultInputDevice() {
|
|
const handleMediaSuccess = (mediaStream) => {
|
|
const deviceLabel = mediaStream.getAudioTracks()[0].label;
|
|
window.defaultInputStream = mediaStream.getTracks();
|
|
return navigator.mediaDevices.enumerateDevices().then((mediaDevices) => {
|
|
const device = mediaDevices.find(d => d.label === deviceLabel);
|
|
return this.changeInputDevice(device.deviceId, deviceLabel);
|
|
});
|
|
};
|
|
|
|
return navigator.mediaDevices.getUserMedia({ audio: true }).then(handleMediaSuccess);
|
|
}
|
|
|
|
changeInputDevice(deviceId, deviceLabel) {
|
|
const {
|
|
media,
|
|
} = this;
|
|
if (media.inputDevice.audioContext) {
|
|
const handleAudioContextCloseSuccess = () => {
|
|
media.inputDevice.audioContext = null;
|
|
media.inputDevice.scriptProcessor = null;
|
|
media.inputDevice.source = null;
|
|
return this.changeInputDevice(deviceId);
|
|
};
|
|
|
|
return media.inputDevice.audioContext.close().then(handleAudioContextCloseSuccess);
|
|
}
|
|
|
|
if ('AudioContext' in window) {
|
|
media.inputDevice.audioContext = new window.AudioContext();
|
|
} else {
|
|
media.inputDevice.audioContext = new window.webkitAudioContext();
|
|
}
|
|
|
|
media.inputDevice.id = deviceId;
|
|
media.inputDevice.label = deviceLabel;
|
|
media.inputDevice.scriptProcessor = media.inputDevice.audioContext
|
|
.createScriptProcessor(2048, 1, 1);
|
|
media.inputDevice.source = null;
|
|
|
|
const constraints = {
|
|
audio: {
|
|
deviceId,
|
|
},
|
|
};
|
|
|
|
const handleMediaSuccess = (mediaStream) => {
|
|
media.inputDevice.stream = mediaStream;
|
|
media.inputDevice.source = media.inputDevice.audioContext
|
|
.createMediaStreamSource(mediaStream);
|
|
media.inputDevice.source.connect(media.inputDevice.scriptProcessor);
|
|
media.inputDevice.scriptProcessor.connect(media.inputDevice.audioContext.destination);
|
|
|
|
return this.media.inputDevice;
|
|
};
|
|
|
|
return navigator.mediaDevices.getUserMedia(constraints).then(handleMediaSuccess);
|
|
}
|
|
|
|
async changeOutputDevice(value) {
|
|
const audioContext = document.querySelector(MEDIA_TAG);
|
|
|
|
if (audioContext.setSinkId) {
|
|
try {
|
|
audioContext.srcObject = null;
|
|
await audioContext.setSinkId(value);
|
|
this.media.outputDeviceId = value;
|
|
} catch (err) {
|
|
logger.error({
|
|
logCode: 'audio_sip_changeoutputdevice_error',
|
|
extraInfo: { error: err },
|
|
}, 'Change Output Device error');
|
|
throw new Error(this.baseErrorCodes.MEDIA_ERROR);
|
|
}
|
|
}
|
|
|
|
return this.media.outputDeviceId || value;
|
|
}
|
|
}
|