mirror of
https://github.com/jambonz/sbc-inbound.git
synced 2025-12-19 04:37:43 +00:00
c270c0df43
* Move parseHostPorts to utils and cover with test suite * fix tabs * comment pre commit hook * add test * wip * remove only * fix 2 critical, 12 high vulnerabilities via npm audit fix --------- Co-authored-by: Markus Frindt <m.frindt@cognigy.com>
1139 lines
42 KiB
JavaScript
1139 lines
42 KiB
JavaScript
const Emitter = require('events');
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const SrsClient = require('@jambonz/siprec-client-utils');
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const {
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makeRtpEngineOpts,
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SdpWantsSrtp,
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SdpWantsSDES,
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nudgeCallCounts,
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roundTripTime,
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parseConnectionIp,
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isPrivateVoipNetwork
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} = require('./utils');
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const {forwardInDialogRequests} = require('drachtio-fn-b2b-sugar');
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const {parseUri, stringifyUri, SipError} = require('drachtio-srf');
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const debug = require('debug')('jambonz:sbc-inbound');
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const MS_TEAMS_USER_AGENT = 'Microsoft.PSTNHub.SIPProxy';
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const MS_TEAMS_SIP_ENDPOINT = 'sip.pstnhub.microsoft.com';
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const IMMUTABLE_HEADERS = ['via', 'from', 'to', 'call-id', 'cseq', 'max-forwards', 'content-length'];
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/**
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* this is to make sure the outgoing From has the number in the incoming From
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* and not the incoming PAI
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*/
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const createBLegFromHeader = (req) => {
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const from = req.getParsedHeader('From');
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const uri = parseUri(from.uri);
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const name = from.name;
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const displayName = name ? `${name} ` : '';
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if (uri && uri.user) return `${displayName}<sip:${uri.user}@localhost>`;
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else return `${displayName}<sip:anonymous@localhost>`;
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};
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const createSiprecBody = (headers, sdp, type, content) => {
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const sep = 'uniqueBoundary';
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headers['Content-Type'] = `multipart/mixed;boundary="${sep}"`;
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return `--${sep}\r
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Content-Type: application/sdp\r
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\r
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${sdp}\r
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--${sep}\r
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Content-Type: ${type}\r
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Content-Disposition: recording-session\r
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\r
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${content}`;
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};
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class CallSession extends Emitter {
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constructor(logger, req, res) {
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super();
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this.req = req;
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this.res = res;
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this.srf = req.srf;
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this.logger = logger.child({callId: req.get('Call-ID')});
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this.siprec = req.locals.siprec;
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this.xml = req.locals.xml;
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this.getRtpEngine = req.srf.locals.getRtpEngine;
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this.getFeatureServer = req.srf.locals.getFeatureServer;
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this.stats = this.srf.locals.stats;
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this.writeCdrs = this.srf.locals.writeCdrs;
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this.activeCallIds = this.srf.locals.activeCallIds;
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this.decrKey = req.srf.locals.realtimeDbHelpers.decrKey;
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this._mediaReleased = false;
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this.application_sid = req.locals.application_sid;
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this.account_sid = req.locals.account_sid;
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this.service_provider_sid = req.locals.service_provider_sid;
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this.srsClients = [];
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this.recordingNoAnswerTimeout = (process.env.JAMBONES_RECORDING_NO_ANSWER_TIMEOUT || 2) * 1000;
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}
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get isFromMSTeams() {
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return !!this.req.locals.msTeamsTenantFqdn;
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}
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get privateSipAddress() {
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return this.srf.locals.privateSipAddress;
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}
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get isMediaReleased() {
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return this._mediaReleased;
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}
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get callerIsUsingSrtp() {
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const tp = this.rtpEngineOpts?.uas?.mediaOpts['transport-protocol'];
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return tp && -1 !== tp.indexOf('SAVP');
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}
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get isFive9VoiceStream() {
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return this.req.has('X-Five9-StreamingPairId');
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}
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subscribeForDTMF(dlg) {
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if (!this._subscribedForDTMF) {
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this._subscribedForDTMF = true;
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this.subscribeDTMF(this.logger, this.req.get('Call-ID'), this.rtpEngineOpts.uas.tag,
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this._onDTMF.bind(this, dlg));
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}
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}
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unsubscribeForDTMF() {
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if (this._subscribedForDTMF) {
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this._subscribedForDTMF = false;
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this.unsubscribeDTMF(this.logger, this.req.get('Call-ID'), this.rtpEngineOpts.uas.tag);
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}
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}
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async connect() {
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const {sdp} = this.req.locals;
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this.logger.info('inbound call accepted for routing');
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const engine = this.getRtpEngine();
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if (!engine) {
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this.logger.info('No available rtpengines, rejecting call!');
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const tags = ['accepted:no', 'sipStatus:480', `originator:${this.req.locals.originator}`];
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this.stats.increment('sbc.terminations', tags);
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return this.res.send(480);
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}
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debug(`got engine: ${JSON.stringify(engine)}`);
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const {
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offer,
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answer,
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del,
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query,
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blockMedia,
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unblockMedia,
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blockDTMF,
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unblockDTMF,
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playDTMF,
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subscribeDTMF,
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unsubscribeDTMF,
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subscribeRequest,
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subscribeAnswer,
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unsubscribe
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} = engine;
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this.offer = offer;
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this.answer = answer;
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this.del = del;
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this.query = query;
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this.blockMedia = blockMedia;
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this.unblockMedia = unblockMedia;
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this.blockDTMF = blockDTMF;
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this.unblockDTMF = unblockDTMF;
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this.playDTMF = playDTMF;
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this.subscribeDTMF = subscribeDTMF;
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this.unsubscribeDTMF = unsubscribeDTMF;
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this.subscribeRequest = subscribeRequest;
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this.subscribeAnswer = subscribeAnswer;
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this.unsubscribe = unsubscribe;
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const featureServer = await this.getFeatureServer();
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if (!featureServer) {
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this.logger.info('No available feature servers, rejecting call!');
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const tags = ['accepted:no', 'sipStatus:480', `originator:${this.req.locals.originator}`];
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this.stats.increment('sbc.terminations', tags);
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return this.res.send(480);
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}
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this.logger.debug(`using feature server ${featureServer}`);
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const wantsSrtp = this.req.locals.possibleWebRtcClient = SdpWantsSrtp(sdp);
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const wantsSDES = SdpWantsSDES(sdp);
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this.rtpEngineOpts = makeRtpEngineOpts(this.req, wantsSrtp, false, this.isFromMSTeams || wantsSDES);
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this.rtpEngineResource = {
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destroy: this.del.bind(null, this.rtpEngineOpts.common),
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query: this.query.bind(null, this.rtpEngineOpts.common),
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};
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const obj = parseUri(this.req.uri);
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let proxy, host, uri;
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const scheme = obj.scheme;
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// replace host part of uri if its an ipv4 address, leave it otherwise
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if (/^\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}$/.test(obj.host)) {
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debug(`replacing host: was ${obj.host} is ${featureServer}`);
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host = featureServer;
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}
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else {
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debug(`not replacing host: "${obj.host}"`);
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host = obj.host;
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proxy = `sip:${featureServer}`;
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}
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if (obj.user) uri = `${scheme}:${obj.user}@${host}`;
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else uri = `${scheme}:${host}`;
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this.logger.info(`uri will be: ${uri}, proxy ${proxy}`);
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try {
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const opts = {
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...this.rtpEngineOpts.common,
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...this.rtpEngineOpts.uac.mediaOpts,
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'from-tag': this.rtpEngineOpts.uas.tag,
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direction: [isPrivateVoipNetwork(this.req.source_address) ? 'private' : 'public', 'private'],
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sdp
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};
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const startAt = process.hrtime();
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const response = await this.offer(opts);
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this.rtpengineIp = opts.sdp ? parseConnectionIp(opts.sdp) : 'undefined';
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const rtt = roundTripTime(startAt);
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this.stats.histogram('app.rtpengine.response_time', rtt, [
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'direction:inbound', 'command:offer', `rtpengine:${this.rtpengineIp}`]);
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this.logger.debug({opts, response, rtt, rtpengine: this.rtpengineIp}, 'response from rtpengine to offer');
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if ('ok' !== response.result) {
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this.logger.error({}, `rtpengine offer failed with ${JSON.stringify(response)}`);
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throw new Error('rtpengine failed: answer');
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}
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let headers = {
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'From': createBLegFromHeader(this.req),
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'To': this.req.get('To'),
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'X-Account-Sid': this.req.locals.account_sid,
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'X-CID': this.req.get('Call-ID'),
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'X-Forwarded-For': `${this.req.source_address}`
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};
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if (this.privateSipAddress) headers = {...headers, Contact: `<sip:${this.privateSipAddress}>`};
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const spdOfferB = this.siprec && this.xml ?
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createSiprecBody(headers, response.sdp, this.xml.type, this.xml.content) :
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response.sdp;
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if (this.req.locals.carrier) {
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Object.assign(headers, {
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'X-Originating-Carrier': this.req.locals.carrier,
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'X-Voip-Carrier-Sid': this.req.locals.voip_carrier_sid
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});
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}
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// set Contact header based on scenario, and transport protocol
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let responseHeaders = {};
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if (isPrivateVoipNetwork(this.req.source_address)) {
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this.contactHeader = `<${scheme}:${this.privateSipAddress};transport=${this.req.protocol}>`;
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responseHeaders = {
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...responseHeaders,
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'Contact': this.contactHeader
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};
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} else if (this.req.locals.msTeamsTenantFqdn) {
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Object.assign(headers, {'X-MS-Teams-Tenant-FQDN': this.req.locals.msTeamsTenantFqdn});
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// for Microsoft Teams the Contact header must include the tenant FQDN
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this.contactHeader = `sip:${this.req.locals.msTeamsTenantFqdn}`;
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responseHeaders = {
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...responseHeaders,
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Allow: 'INVITE, ACK, OPTIONS, CANCEL, BYE, NOTIFY, UPDATE, PRACK',
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Contact: this.contactHeader
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};
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}
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else {
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const hostport = this.srf.locals.sbcPublicIpAddress[this.req.protocol];
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this.contactHeader = `<${scheme}:${hostport};transport=${this.req.protocol}>`;
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responseHeaders = {
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...responseHeaders,
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'Contact': this.contactHeader
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};
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}
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if (this.req.locals.application_sid) {
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Object.assign(headers, {'X-Application-Sid': this.req.locals.application_sid});
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}
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if (this.req.authorization) {
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if (this.req.authorization.grant && this.req.authorization.grant.application_sid) {
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Object.assign(headers, {'X-Application-Sid': this.req.authorization.grant.application_sid});
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}
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if (this.req.authorization.challengeResponse) {
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const {username, realm} = this.req.authorization.challengeResponse;
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Object.assign(headers, {'X-Authenticated-User': `${username}@${realm}`});
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}
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}
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if (this.req.canceled) throw new Error('call canceled');
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// now send the INVITE in towards the feature servers
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debug(`sending INVITE to ${proxy} with ${uri}`);
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const {uas, uac} = await this.srf.createB2BUA(this.req, this.res, uri, {
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proxy,
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headers,
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responseHeaders,
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proxyRequestHeaders: [
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'all',
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'-Authorization',
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'-Max-Forwards',
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'-Record-Route',
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'-Session-Expires',
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'-X-Application-Sid',
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'-X-Authenticated-User'
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],
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proxyResponseHeaders: ['all', '-X-Trace-ID'],
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localSdpB: spdOfferB,
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localSdpA: async(sdp, res) => {
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this.rtpEngineOpts.uac.tag = res.getParsedHeader('To').params.tag;
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const opts = {
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...this.rtpEngineOpts.common,
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...this.rtpEngineOpts.uas.mediaOpts,
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'from-tag': this.rtpEngineOpts.uas.tag,
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'to-tag': this.rtpEngineOpts.uac.tag,
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sdp
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};
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const startAt = process.hrtime();
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const response = await this.answer(opts);
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this.logger.debug({response, opts}, 'response from rtpengine to answer');
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const rtt = roundTripTime(startAt);
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this.stats.histogram('app.rtpengine.response_time', rtt, [
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'direction:inbound', 'command:answer', `rtpengine:${this.rtpengineIp}`]);
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if ('ok' !== response.result) {
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this.logger.error(`rtpengine answer failed with ${JSON.stringify(response)}`);
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throw new Error('rtpengine failed: answer');
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}
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/* special case: Five9 Voicestream calls do not advertise a:sendonly, though they should */
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if (this.isFive9VoiceStream) {
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const opts = {
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...this.rtpEngineOpts.common,
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'from-tag':this.rtpEngineOpts.uac.tag
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};
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this.logger.info('Voicestream call from Five9, blocking audio in the reverse direction');
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const response = await Promise.all([this.blockMedia(opts), this.blockDTMF(opts)]);
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this.logger.debug({response}, 'response to blockMedia/blockDTMF');
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}
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return response.sdp;
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}
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});
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// successfully connected
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this.logger.info('call connected successfully to feature server');
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debug('call connected successfully to feature server');
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this._setHandlers({uas, uac});
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return;
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} catch (err) {
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this.rtpEngineResource.destroy().catch((err) => this.logger.info({err}, 'Error destroying rtpe after failure'));
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this.activeCallIds.delete(this.req.get('Call-ID'));
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if (err instanceof SipError) {
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const tags = ['accepted:no', `sipStatus:${err.status}`, `originator:${this.req.locals.originator}`];
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this.stats.increment('sbc.terminations', tags);
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this.logger.info(`call failed to connect to feature server with ${err.status}`);
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this.emit('failed');
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}
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else if (err.message !== 'call canceled') {
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this.logger.error(err, 'unexpected error routing inbound call');
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}
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this.srf.endSession(this.req);
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}
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}
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_setDlgHandlers(dlg) {
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const {callId} = dlg.sip;
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this.activeCallIds.set(callId, this);
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this.subscribeForDTMF(this.uac);
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dlg.on('destroy', () => {
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debug('call ended with normal termination');
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this.logger.info('call ended with normal termination');
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this.rtpEngineResource.destroy().catch((err) => {});
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this.activeCallIds.delete(callId);
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if (dlg.other && dlg.other.connected) dlg.other.destroy().catch((e) => {});
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this._stopRecording();
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this.srf.endSession(this.req);
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});
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//re-invite
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dlg.on('modify', this._onReinvite.bind(this, dlg));
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}
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_startRecordingNoAnswerTimer(res) {
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this._clearRecordingNoAnswerTimer();
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this.recordingNoAnswerTimer = setTimeout(() => {
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this.logger.info('No response from SipRec server, return error to feature server');
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this.isRecordingNoAnswerResponded = true;
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res.send(400);
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}, this.recordingNoAnswerTimeout);
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}
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_clearRecordingNoAnswerTimer() {
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if (this.recordingNoAnswerTimer) {
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clearTimeout(this.recordingNoAnswerTimer);
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this.recordingNoAnswerTimer = null;
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}
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}
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_stopRecording() {
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if (this.srsClients.length) {
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this.srsClients.forEach((c) => c.stop());
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this.srsClients = [];
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}
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}
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_setHandlers({uas, uac}) {
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this.emit('connected');
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const callStart = Date.now();
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const call_sid = uac.res?.get('X-Call-Sid');
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const application_sid = this.application_sid || uac.res?.get('X-Application-Sid');
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const tags = ['accepted:yes', 'sipStatus:200', `originator:${this.req.locals.originator}`];
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this.stats.increment('sbc.terminations', tags);
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this.activeCallIds.set(this.req.get('Call-ID'), this);
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if (this.req.locals.cdr) {
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this.req.locals.cdr = {
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...this.req.locals.cdr,
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answered: true,
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answered_at: callStart,
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...(call_sid && {call_sid}),
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...(application_sid && {application_sid}),
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trace_id: uac.res?.get('X-Trace-ID') || '00000000000000000000000000000000'
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};
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}
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this.uas = uas;
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this.uac = uac;
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[uas, uac].forEach((dlg) => {
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dlg.on('destroy', async(bye) => {
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const other = dlg.other;
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this.rtpEngineResource.destroy().catch((err) => {});
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/* DH: need a better understanding of why query before delete is a good idea
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this.rtpEngineResource.query()
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.then((results) => {
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this.logger.info({results}, 'rtpengine query results');
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return this.rtpEngineResource.destroy();
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})
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.catch((err) => {});
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*/
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this.activeCallIds.delete(this.req.get('Call-ID'));
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try {
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const headers = {};
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Object.keys(bye.headers).forEach((h) => {
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if (!IMMUTABLE_HEADERS.includes(h)) headers[h] = bye.headers[h];
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});
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await other.destroy({headers});
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} catch (err) {}
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this.unsubscribeForDTMF();
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const trackingOn = process.env.JAMBONES_TRACK_ACCOUNT_CALLS ||
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process.env.JAMBONES_TRACK_SP_CALLS ||
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process.env.JAMBONES_TRACK_APP_CALLS;
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if (process.env.JAMBONES_HOSTING || trackingOn) {
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const {writeCallCount, writeCallCountSP, writeCallCountApp} = this.req.srf.locals;
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await nudgeCallCounts(this.logger, {
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service_provider_sid: this.service_provider_sid,
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account_sid: this.account_sid,
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application_sid: this.application_sid
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}, this.decrKey, {writeCallCountSP, writeCallCount, writeCallCountApp})
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.catch((err) => this.logger.error(err, 'Error decrementing call counts'));
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}
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/* write cdr for connected call */
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if (this.req.locals.cdr) {
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const now = Date.now();
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const trunk = ['trunk', 'teams'].includes(this.req.locals.originator) ?
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this.req.locals.carrier :
|
|
this.req.locals.originator;
|
|
const application = await this.srf.locals.getApplicationBySid(application_sid);
|
|
const isRecording = this.req.locals.account.record_all_calls || (application && application.record_all_calls);
|
|
const day = new Date();
|
|
let recording_url = `/Accounts/${this.account_sid}/RecentCalls/${call_sid}/record`;
|
|
recording_url += `/${day.getFullYear()}/${(day.getMonth() + 1).toString().padStart(2, '0')}`;
|
|
recording_url += `/${day.getDate().toString().padStart(2, '0')}/${this.req.locals.account.record_format}`;
|
|
const cdr = {...this.req.locals.cdr,
|
|
terminated_at: now,
|
|
termination_reason: dlg.type === 'uas' ? 'caller hungup' : 'called party hungup',
|
|
sip_status: 200,
|
|
duration: Math.floor((now - callStart) / 1000),
|
|
trunk,
|
|
...(isRecording && {recording_url})
|
|
};
|
|
this.logger.info({cdr}, 'going to write a cdr now..');
|
|
this.writeCdrs({...this.req.locals.cdr,
|
|
terminated_at: now,
|
|
termination_reason: dlg.type === 'uas' ? 'caller hungup' : 'called party hungup',
|
|
sip_status: 200,
|
|
duration: Math.floor((now - callStart) / 1000),
|
|
trunk,
|
|
...(isRecording && {recording_url})
|
|
})
|
|
.then(() => this.logger.debug('successfully wrote cdr'))
|
|
.catch((err) => this.logger.error({err}, 'Error writing cdr for completed call'));
|
|
}
|
|
/* de-link the 2 Dialogs for GC */
|
|
dlg.removeAllListeners();
|
|
other.removeAllListeners();
|
|
dlg.other = null;
|
|
other.other = null;
|
|
|
|
this._stopRecording();
|
|
|
|
this.logger.info(`call ended with normal termination, there are ${this.activeCallIds.size} active`);
|
|
this.srf.endSession(this.req);
|
|
});
|
|
});
|
|
|
|
this.subscribeForDTMF(uac);
|
|
|
|
uas.on('modify', this._onReinvite.bind(this, uas));
|
|
uac.on('modify', this._onReinvite.bind(this, uac));
|
|
|
|
uac.on('refer', this._onFeatureServerTransfer.bind(this, uac));
|
|
uas.on('refer', this._onRefer.bind(this, uas));
|
|
|
|
uas.on('info', this._onInfo.bind(this, uas));
|
|
uac.on('info', this._onInfo.bind(this, uac));
|
|
|
|
// default forwarding of other request types
|
|
forwardInDialogRequests(uas, ['notify', 'options', 'message']);
|
|
|
|
// we need special handling for invite with null sdp followed by 3pcc re-invite
|
|
if (uas.local.sdp.includes('a=recvonly') || uas.local.sdp.includes('a=inactive')) {
|
|
this.logger.info('incoming call is recvonly or inactive, waiting for re-invite');
|
|
this._recvonly = true;
|
|
}
|
|
}
|
|
|
|
async _onDTMF(dlg, payload) {
|
|
this.logger.info({payload}, '_onDTMF');
|
|
try {
|
|
let dtmf;
|
|
switch (payload.event) {
|
|
case 10:
|
|
dtmf = '*';
|
|
break;
|
|
case 11:
|
|
dtmf = '#';
|
|
break;
|
|
default:
|
|
dtmf = '' + payload.event;
|
|
break;
|
|
}
|
|
await dlg.request({
|
|
method: 'INFO',
|
|
headers: {
|
|
'Content-Type': 'application/dtmf-relay'
|
|
},
|
|
body: `Signal=${dtmf}
|
|
Duration=${payload.duration} `
|
|
});
|
|
} catch (err) {
|
|
this.logger.info({err}, 'Error sending INFO application/dtmf-relay');
|
|
}
|
|
}
|
|
|
|
/**
|
|
* handle INVITE with Replaces header from uas side (this will never come from the feature server)
|
|
* @param {*} req incoming request
|
|
* @param {*} res incoming response
|
|
*/
|
|
async replaces(req, res) {
|
|
try {
|
|
const fromTag = this.rtpEngineOpts.uas.tag;
|
|
const toTag = this.rtpEngineOpts.uac.tag;
|
|
const offerMedia = this.rtpEngineOpts.uac.mediaOpts;
|
|
const answerMedia = this.rtpEngineOpts.uas.mediaOpts;
|
|
const direction = ['public', 'private'];
|
|
let opts = {
|
|
...this.rtpEngineOpts.common,
|
|
...offerMedia,
|
|
'from-tag': fromTag,
|
|
'to-tag': toTag,
|
|
direction,
|
|
sdp: req.body,
|
|
};
|
|
let response = await this.offer(opts);
|
|
if ('ok' !== response.result) {
|
|
res.send(488);
|
|
throw new Error(`replaces: rtpengine failed: offer: ${JSON.stringify(response)}`);
|
|
}
|
|
this.logger.info({opts, response}, 'sent offer for reinvite to rtpengine');
|
|
const sdp = await this.uac.modify(response.sdp);
|
|
opts = {
|
|
...this.rtpEngineOpts.common,
|
|
...answerMedia,
|
|
'from-tag': fromTag,
|
|
'to-tag': toTag,
|
|
sdp
|
|
};
|
|
response = await this.answer(opts);
|
|
if ('ok' !== response.result) {
|
|
res.send(488);
|
|
throw new Error(`replaces: rtpengine failed: ${JSON.stringify(response)}`);
|
|
}
|
|
this.logger.info({opts, response}, 'sent answer for reinvite to rtpengine');
|
|
const headers = {};
|
|
if (this.req.locals.msTeamsTenantFqdn) {
|
|
Object.assign(headers, {'X-MS-Teams-Tenant-FQDN': this.req.locals.msTeamsTenantFqdn});
|
|
|
|
// for Microsoft Teams the Contact header must include the tenant FQDN
|
|
Object.assign(headers, {
|
|
Allow: 'INVITE, ACK, OPTIONS, CANCEL, BYE, NOTIFY',
|
|
Contact: `sip:${this.req.locals.msTeamsTenantFqdn}`
|
|
});
|
|
}
|
|
|
|
this.unsubscribeForDTMF();
|
|
|
|
const uas = await this.srf.createUAS(req, res, {
|
|
localSdp: response.sdp,
|
|
headers
|
|
});
|
|
this.logger.info('successfully connected new INVITE w/replaces, hanging up leg being replaced');
|
|
this.uas.destroy();
|
|
this.req = req;
|
|
this.uas = uas;
|
|
this.uas.other = this.uac;
|
|
this.uac.other = this.uas;
|
|
this.activeCallIds.delete(this.req.get('Call-ID'));
|
|
this._setDlgHandlers(uas);
|
|
} catch (err) {
|
|
this.logger.error(err, 'Error handling invite with replaces');
|
|
res.send(err.status || 500);
|
|
}
|
|
}
|
|
|
|
async _onReinvite(dlg, req, res) {
|
|
const fromTag = dlg.type === 'uas' ? this.rtpEngineOpts.uas.tag : this.rtpEngineOpts.uac.tag;
|
|
const toTag = dlg.type === 'uas' ? this.rtpEngineOpts.uac.tag : this.rtpEngineOpts.uas.tag;
|
|
const reason = req.get('X-Reason');
|
|
const isReleasingMedia = reason && dlg.type === 'uac' && ['release-media', 'anchor-media'].includes(reason);
|
|
const offerMedia = dlg.type === 'uas' ? this.rtpEngineOpts.uac.mediaOpts : this.rtpEngineOpts.uas.mediaOpts;
|
|
const answerMedia = dlg.type === 'uas' ? this.rtpEngineOpts.uas.mediaOpts : this.rtpEngineOpts.uac.mediaOpts;
|
|
const direction = dlg.type === 'uas' ? ['public', 'private'] : ['private', 'public'];
|
|
|
|
try {
|
|
/* check for re-invite with no SDP -- seen that from BT when they provide UUI info */
|
|
if (!req.body) {
|
|
if (dlg.type === 'uas' && this._recvonly) {
|
|
/* seen this from Broadworks - initial INVITE has no SDP, then reINVITE with SDP */
|
|
this._recvonly = false; //one-time only
|
|
const myMungedSdp = dlg.local.sdp.replace('a=recvonly', 'a=sendrecv').replace('a=inactive', 'a=sendrecv');
|
|
this.logger.info({myMungedSdp}, '_onReinvite (3gpp): got a reINVITE with no SDP while in recvonly mode');
|
|
res.send(200,
|
|
{
|
|
body: myMungedSdp
|
|
},
|
|
(err, req) => {},
|
|
async(ack) => {
|
|
const remoteOffer = ack.body;
|
|
this.logger.info({remoteOffer}, '_onReinvite (3gpp): got ACK for reINVITE with SDP');
|
|
let opts = {
|
|
...this.rtpEngineOpts.common,
|
|
...offerMedia,
|
|
'from-tag': fromTag,
|
|
'to-tag': toTag,
|
|
direction,
|
|
sdp: remoteOffer,
|
|
};
|
|
let response = await this.offer(opts);
|
|
if ('ok' !== response.result) {
|
|
res.send(488);
|
|
throw new Error(`_onReinvite (3gpp): rtpengine failed: offer: ${JSON.stringify(response)}`);
|
|
}
|
|
this.logger.info({response}, '_onReinvite (3gpp): response from rtpengine for offer');
|
|
const fsSdp = await dlg.other.modify(response.sdp);
|
|
opts = {
|
|
...this.rtpEngineOpts.common,
|
|
...answerMedia,
|
|
'from-tag': fromTag,
|
|
'to-tag': toTag,
|
|
sdp: fsSdp
|
|
};
|
|
response = await this.answer(opts);
|
|
if ('ok' !== response.result) {
|
|
res.send(488);
|
|
throw new Error(`_onReinvite(3gpp): rtpengine failed answer: ${JSON.stringify(response)}`);
|
|
}
|
|
}
|
|
);
|
|
}
|
|
else {
|
|
this.logger.info('got a reINVITE with no SDP; just respond with our current offer');
|
|
res.send(200, {
|
|
headers: {
|
|
'Contact': this.contactHeader
|
|
},
|
|
body: dlg.local.sdp
|
|
});
|
|
}
|
|
return;
|
|
}
|
|
const offeredSdp = Array.isArray(req.payload) && req.payload.length > 1 ?
|
|
req.payload.find((p) => p.type === 'application/sdp').content :
|
|
req.body;
|
|
|
|
if (isReleasingMedia) {
|
|
if (!offerMedia.flags.includes('asymmetric')) offerMedia.flags.push('asymmetric');
|
|
offerMedia.flags = offerMedia.flags.filter((f) => f !== 'media handover');
|
|
}
|
|
let opts = {
|
|
...this.rtpEngineOpts.common,
|
|
...offerMedia,
|
|
'from-tag': fromTag,
|
|
'to-tag': toTag,
|
|
direction,
|
|
sdp: offeredSdp,
|
|
};
|
|
// Dont reset ICE - causes audiocodes webrtrc to fail with "missing ice-ufrag and ice-pwd in re-invite"
|
|
// if (reason && opts.flags && !opts.flags.includes('reset')) opts.flags.push('reset');
|
|
|
|
let response = await this.offer(opts);
|
|
if ('ok' !== response.result) {
|
|
res.send(488);
|
|
throw new Error(`_onReinvite: rtpengine failed: offer: ${JSON.stringify(response)}`);
|
|
}
|
|
|
|
/* if this is a re-invite from the FS to change media anchoring, avoid sending the reinvite out */
|
|
let sdp;
|
|
if (isReleasingMedia && !this.callerIsUsingSrtp) {
|
|
this.logger.info({response}, `got a reinvite from FS to ${reason}`);
|
|
sdp = dlg.other.remote.sdp;
|
|
if (!answerMedia.flags.includes('asymmetric')) answerMedia.flags.push('asymmetric');
|
|
answerMedia.flags = answerMedia.flags.filter((f) => f !== 'media handover');
|
|
this._mediaReleased = 'release-media' === reason;
|
|
}
|
|
else {
|
|
sdp = await dlg.other.modify(response.sdp);
|
|
}
|
|
opts = {
|
|
...this.rtpEngineOpts.common,
|
|
...answerMedia,
|
|
'from-tag': fromTag,
|
|
'to-tag': toTag,
|
|
sdp
|
|
};
|
|
response = await this.answer(opts);
|
|
if ('ok' !== response.result) {
|
|
res.send(488);
|
|
throw new Error(`_onReinvite: rtpengine failed: ${JSON.stringify(response)}`);
|
|
}
|
|
res.send(200, {
|
|
headers: {
|
|
'Contact': this.contactHeader
|
|
},
|
|
body: response.sdp
|
|
});
|
|
} catch (err) {
|
|
res.send(err.status || 500);
|
|
this.logger.error(err, 'Error handling reinvite');
|
|
}
|
|
}
|
|
|
|
async _onInfo(dlg, req, res) {
|
|
const fromTag = dlg.type === 'uas' ? this.rtpEngineOpts.uas.tag : this.rtpEngineOpts.uac.tag;
|
|
const toTag = dlg.type === 'uas' ? this.rtpEngineOpts.uac.tag : this.rtpEngineOpts.uas.tag;
|
|
const contentType = req.get('Content-Type');
|
|
try {
|
|
if (dlg.type === 'uac' && req.has('X-Reason')) {
|
|
const reason = req.get('X-Reason');
|
|
const opts = {
|
|
...this.rtpEngineOpts.common,
|
|
flags: ['reset'],
|
|
'from-tag': fromTag
|
|
};
|
|
this.logger.info(`_onInfo: got request ${reason}`);
|
|
|
|
if (reason.startsWith('mute')) {
|
|
const response = Promise.all([this.blockMedia(opts), this.blockDTMF(opts)]);
|
|
res.send(200);
|
|
this.logger.info({response}, `_onInfo: response to rtpengine command for ${reason}`);
|
|
}
|
|
else if (reason.startsWith('unmute')) {
|
|
const response = Promise.all([this.unblockMedia(opts), this.unblockDTMF(opts)]);
|
|
res.send(200);
|
|
this.logger.info({response}, `_onInfo: response to rtpengine command for ${reason}`);
|
|
}
|
|
else if (reason.includes('CallRecording')) {
|
|
let succeeded = false;
|
|
const headers = contentType === 'application/json' && req.body ? JSON.parse(req.body) : {};
|
|
if (reason === 'startCallRecording') {
|
|
const from = this.req.getParsedHeader('From');
|
|
const to = this.req.getParsedHeader('To');
|
|
const aorFrom = from.uri;
|
|
const aorTo = to.uri;
|
|
this.logger.info({to, from}, 'startCallRecording request for a call');
|
|
|
|
const srsUrl = req.get('X-Srs-Url');
|
|
const srsRecordingId = req.get('X-Srs-Recording-ID');
|
|
const callSid = req.get('X-Call-Sid');
|
|
const accountSid = req.get('X-Account-Sid');
|
|
const applicationSid = req.get('X-Application-Sid');
|
|
if (this.srsClients.length) {
|
|
res.send(400);
|
|
this.logger.info('discarding duplicate startCallRecording request for a call');
|
|
return;
|
|
}
|
|
if (!srsUrl) {
|
|
this.logger.info('startCallRecording request is missing X-Srs-Url header');
|
|
res.send(400);
|
|
return;
|
|
}
|
|
const arr = srsUrl.split(',');
|
|
this.srsClients = arr.map((url) => new SrsClient(this.logger, {
|
|
srf: dlg.srf,
|
|
direction: 'inbound',
|
|
originalInvite: this.req,
|
|
callingNumber: this.req.callingNumber,
|
|
calledNumber: this.req.calledNumber,
|
|
srsUrl: url,
|
|
srsRecordingId,
|
|
callSid,
|
|
accountSid,
|
|
applicationSid,
|
|
rtpEngineOpts: this.rtpEngineOpts,
|
|
fromTag,
|
|
toTag,
|
|
aorFrom,
|
|
aorTo,
|
|
subscribeRequest: this.subscribeRequest,
|
|
subscribeAnswer: this.subscribeAnswer,
|
|
del: this.del,
|
|
blockMedia: this.blockMedia,
|
|
unblockMedia: this.unblockMedia,
|
|
unsubscribe: this.unsubscribe,
|
|
headers
|
|
}));
|
|
try {
|
|
this._startRecordingNoAnswerTimer(res);
|
|
await Promise.any(this.srsClients.map((c) => c.start()));
|
|
succeeded = true;
|
|
} catch (err) {
|
|
this.logger.error({err}, 'Error starting SipRec call recording');
|
|
succeeded = false;
|
|
}
|
|
}
|
|
else if (reason === 'stopCallRecording') {
|
|
if (!this.srsClients.length || !this.srsClients.some((c) => c.activated)) {
|
|
res.send(400);
|
|
this.logger.info('discarding stopCallRecording request because we are not recording');
|
|
return;
|
|
}
|
|
try {
|
|
this._startRecordingNoAnswerTimer(res);
|
|
await Promise.any(this.srsClients.map((c) => {
|
|
if (c.activated) {
|
|
c.stop();
|
|
}
|
|
}));
|
|
succeeded = true;
|
|
} catch (err) {
|
|
this.logger.error({err}, 'Error stopping SipRec call recording');
|
|
succeeded = false;
|
|
}
|
|
this.srsClients = [];
|
|
}
|
|
else if (reason === 'pauseCallRecording') {
|
|
if (!this.srsClients.length || !this.srsClients.some((c) => c.activated && !c.paused)) {
|
|
this.logger.info('discarding invalid pauseCallRecording request');
|
|
res.send(400);
|
|
return;
|
|
}
|
|
try {
|
|
this._startRecordingNoAnswerTimer(res);
|
|
await Promise.any(this.srsClients.map((c) => {
|
|
if (c.activated && !c.paused) {
|
|
c.pause({headers});
|
|
}
|
|
}));
|
|
succeeded = true;
|
|
} catch (err) {
|
|
this.logger.error({err}, 'Error pausing SipRec call recording');
|
|
succeeded = false;
|
|
}
|
|
}
|
|
else if (reason === 'resumeCallRecording') {
|
|
if (!this.srsClients.length || !this.srsClients.some((c) => c.activated && c.paused)) {
|
|
res.send(400);
|
|
this.logger.info('discarding invalid resumeCallRecording request');
|
|
return;
|
|
}
|
|
try {
|
|
this._startRecordingNoAnswerTimer(res);
|
|
await Promise.any(this.srsClients.map((c) => {
|
|
if (c.activated && c.paused) {
|
|
c.resume({headers});
|
|
}
|
|
}));
|
|
succeeded = true;
|
|
} catch (err) {
|
|
this.logger.error({err}, 'Error resuming SipRec call recording');
|
|
succeeded = false;
|
|
}
|
|
}
|
|
if (!this.isRecordingNoAnswerResponded) {
|
|
this._clearRecordingNoAnswerTimer();
|
|
res.send(succeeded ? 200 : 503);
|
|
}
|
|
} else if (reason.includes('Dtmf')) {
|
|
const arr = /Signal=\s*([0-9#*])/.exec(req.body);
|
|
if (!arr) {
|
|
this.logger.info({body: req.body}, '_onInfo: invalid INFO Dtmf');
|
|
throw new Error(`_onInfo: no dtmf in body for ${contentType}`);
|
|
}
|
|
const code = arr[1];
|
|
const arr2 = /Duration=\s*(\d+)/.exec(req.body);
|
|
const duration = arr2 ? arr2[1] : 250;
|
|
const dtmfOpts = {
|
|
...this.rtpEngineOpts.common,
|
|
'from-tag': this.rtpEngineOpts.uac.tag,
|
|
code,
|
|
duration
|
|
};
|
|
const response = await this.playDTMF(dtmfOpts);
|
|
if ('ok' !== response.result) {
|
|
this.logger.info({response}, `rtpengine play Dtmf failed with ${JSON.stringify(response)}`);
|
|
throw new Error('rtpengine failed: answer');
|
|
}
|
|
res.send(200);
|
|
}
|
|
}
|
|
else if (dlg.type === 'uas' && ['application/dtmf-relay', 'application/dtmf'].includes(contentType)) {
|
|
const arr = /Signal=\s*([0-9#*])/.exec(req.body);
|
|
if (!arr) {
|
|
this.logger.info({body: req.body}, '_onInfo: invalid INFO dtmf request');
|
|
throw new Error(`_onInfo: no dtmf in body for ${contentType}`);
|
|
}
|
|
const code = arr[1];
|
|
const arr2 = /Duration=\s*(\d+)/.exec(req.body);
|
|
const duration = arr2 ? arr2[1] : 250;
|
|
|
|
if (this.isMediaReleased) {
|
|
/* just relay on to the feature server */
|
|
this.logger.info({code, duration}, 'got SIP INFO DTMF from caller, relaying to feature server');
|
|
this._onDTMF(dlg.other, {event: code, duration})
|
|
.catch((err) => this.logger.info({err}, 'Error relaying DTMF to feature server'));
|
|
res.send(200);
|
|
}
|
|
else {
|
|
/* else convert SIP INFO to RFC 2833 telephony events */
|
|
this.logger.info({code, duration}, 'got SIP INFO DTMF from caller, converting to RFC 2833');
|
|
const opts = {
|
|
...this.rtpEngineOpts.common,
|
|
'from-tag': this.rtpEngineOpts.uas.tag,
|
|
code,
|
|
duration
|
|
};
|
|
const response = await this.playDTMF(opts);
|
|
if ('ok' !== response.result) {
|
|
this.logger.info({response}, `rtpengine playDTMF failed with ${JSON.stringify(response)}`);
|
|
throw new Error('rtpengine failed: answer');
|
|
}
|
|
res.send(200);
|
|
}
|
|
}
|
|
else {
|
|
const headers = {};
|
|
Object.keys(req.headers).forEach((h) => {
|
|
if (!IMMUTABLE_HEADERS.includes(h)) headers[h] = req.headers[h];
|
|
});
|
|
const response = await dlg.other.request({method: 'INFO', headers, body: req.body});
|
|
const responseHeaders = {};
|
|
if (response.has('Content-Type')) {
|
|
Object.assign(responseHeaders, {'Content-Type': response.get('Content-Type')});
|
|
}
|
|
res.send(response.status, {headers: responseHeaders, body: response.body});
|
|
}
|
|
} catch (err) {
|
|
if (this.srsClients.length) {
|
|
this.srsClients = [];
|
|
}
|
|
res.send(500);
|
|
this.logger.info({err}, `Error handing INFO request on ${dlg.type} leg`);
|
|
}
|
|
}
|
|
|
|
async _onFeatureServerTransfer(dlg, req, res) {
|
|
try {
|
|
const referTo = req.getParsedHeader('Refer-To');
|
|
const uri = parseUri(referTo.uri);
|
|
this.logger.info({uri, referTo, headers: req.headers}, 'received REFER from feature server');
|
|
const arr = /context-(.*)/.exec(uri.user);
|
|
if (!arr) {
|
|
/* call transfer requested */
|
|
const {gateway} = this.req.locals;
|
|
const referredBy = req.getParsedHeader('Referred-By');
|
|
if (!referredBy) return res.send(400);
|
|
const u = parseUri(referredBy.uri);
|
|
const leaveReferToAlone = req.has('X-Refer-To-Leave-Untouched');
|
|
if (leaveReferToAlone) {
|
|
this.logger.debug({referTo}, 'passing Refer-To header through untouched');
|
|
}
|
|
else {
|
|
const isDotDecimal = /^(?:[0-9]{1,3}\.){3}[0-9]{1,3}$/.test(uri.host);
|
|
let selectedGateway = false;
|
|
let e164 = false;
|
|
if (gateway && isDotDecimal) {
|
|
/* host of Refer-to to an outbound gateway */
|
|
const gw = await this.srf.locals.getOutboundGatewayForRefer(gateway.voip_carrier_sid);
|
|
if (gw) {
|
|
selectedGateway = true;
|
|
e164 = gw.e164_leading_plus;
|
|
uri.host = gw.ipv4;
|
|
uri.port = gw.port;
|
|
}
|
|
}
|
|
if (!selectedGateway && isDotDecimal) {
|
|
uri.host = this.req.source_address;
|
|
uri.port = this.req.source_port;
|
|
}
|
|
if (e164 && !uri.user.startsWith('+')) {
|
|
uri.user = `+${uri.user}`;
|
|
}
|
|
}
|
|
// eslint-disable-next-line no-unused-vars
|
|
const {via, from, to, 'call-id':callid, cseq, 'max-forwards':maxforwards,
|
|
// eslint-disable-next-line no-unused-vars
|
|
'content-length':contentlength, 'refer-to':_referto, 'referred-by':_referredby,
|
|
// eslint-disable-next-line no-unused-vars
|
|
'X-Refer-To-Leave-Untouched': _leave,
|
|
...customHeaders
|
|
} = req.headers;
|
|
|
|
const response = await this.uas.request({
|
|
method: 'REFER',
|
|
headers: {
|
|
'Refer-To': `<${stringifyUri(uri)}>`,
|
|
'Referred-By': `<${stringifyUri(u)}>`,
|
|
...customHeaders
|
|
}
|
|
});
|
|
return res.send(response.status);
|
|
}
|
|
res.send(202);
|
|
|
|
// invite to new fs
|
|
const headers = {
|
|
...(req.has('X-Retain-Call-Sid') && {'X-Retain-Call-Sid': req.get('X-Retain-Call-Sid')}),
|
|
...(req.has('X-Account-Sid') && {'X-Account-Sid': req.get('X-Account-Sid')})
|
|
};
|
|
const uac = await this.srf.createUAC(referTo.uri, {localSdp: dlg.local.sdp, headers});
|
|
this.uac = uac;
|
|
uac.other = this.uas;
|
|
this.uas.other = uac;
|
|
uac.on('info', this._onInfo.bind(this, uac));
|
|
uac.on('modify', this._onReinvite.bind(this, uac));
|
|
uac.on('refer', this._onFeatureServerTransfer.bind(this, uac));
|
|
uac.on('destroy', () => {
|
|
this.logger.info('call ended with normal termination');
|
|
this.rtpEngineResource.destroy();
|
|
this.activeCallIds.delete(this.req.get('Call-ID'));
|
|
uac.other.destroy();
|
|
this.srf.endSession(this.req);
|
|
});
|
|
|
|
const opts = {
|
|
...this.rtpEngineOpts.common,
|
|
'from-tag': this.rtpEngineOpts.uas.tag,
|
|
'to-tag': this.rtpEngineOpts.uac.tag,
|
|
sdp: uac.remote.sdp,
|
|
flags: ['port latching']
|
|
};
|
|
const response = await this.answer(opts);
|
|
if ('ok' !== response.result) {
|
|
throw new Error(`_onFeatureServerTransfer: rtpengine answer failed: ${JSON.stringify(response)}`);
|
|
}
|
|
dlg.destroy().catch(() => {});
|
|
this.logger.info('successfully moved call to new feature server');
|
|
} catch (err) {
|
|
res.send(488);
|
|
this.logger.error(err, 'Error handling refer from feature server');
|
|
}
|
|
}
|
|
|
|
|
|
async _onRefer(dlg, req, res) {
|
|
const ua = req.get('User-Agent');
|
|
const referTo = req.get('Refer-To');
|
|
const rt = req.getParsedHeader('Refer-To');
|
|
const uri = parseUri(rt.uri);
|
|
this.logger.info({referTo, ua, rt, uri}, 'got a REFER');
|
|
|
|
/**
|
|
* send NOTIFY of INVITE status, return true if call answered
|
|
*/
|
|
const sendNotify = (dlg, body) => {
|
|
const arr = /SIP\/2.0\s+(\d+).*$/.exec(body);
|
|
const status = arr ? parseInt(arr[1]) : null;
|
|
dlg.request({
|
|
method: 'NOTIFY',
|
|
headers: {
|
|
'Content-Type': 'message/sipfrag;version=2.0',
|
|
'Contact': `sip:${this.req.locals.msTeamsTenantFqdn}`
|
|
},
|
|
body
|
|
});
|
|
this.logger.info(`sent NOTIFY for REFER with status ${status}`);
|
|
return status === 200;
|
|
};
|
|
|
|
if (this.isFromMSTeams && ua.startsWith(MS_TEAMS_USER_AGENT) &&
|
|
referTo.startsWith(`<sip:${MS_TEAMS_SIP_ENDPOINT}`) &&
|
|
!uri.user) {
|
|
|
|
// the Refer-To endpoint is within Teams itself, so we can handle
|
|
res.send(202);
|
|
try {
|
|
const dlg = await this.srf.createUAC(rt.uri, {
|
|
localSdp: this.uas.local.sdp.replace(/a=inactive/g, 'a=sendrecv'),
|
|
headers: {
|
|
'From': `sip:${this.req.callingNumber}@${this.req.locals.msTeamsTenantFqdn}`,
|
|
'Contact': `sip:${this.req.callingNumber}@${this.req.locals.msTeamsTenantFqdn}`
|
|
}
|
|
},
|
|
{
|
|
cbRequest: (err, inviteSent) => {
|
|
if (err) return sendNotify(this.uas, `SIP/2.0 ${err.status || '500'}`);
|
|
sendNotify(this.uas, '100 Trying ');
|
|
this.referInvite = inviteSent;
|
|
},
|
|
cbProvisional: (prov) => {
|
|
sendNotify(this.uas, `${prov.status} ${prov.reason}`);
|
|
}
|
|
});
|
|
|
|
// successfully connected
|
|
this.logger.info('successfully connected new call leg for REFER');
|
|
this.unsubscribeForDTMF();
|
|
this.referInvite = null;
|
|
sendNotify(this.uas, '200 OK');
|
|
this.uas.destroy();
|
|
this.uas = dlg;
|
|
this.uas.other = this.uac;
|
|
this.activeCallIds.delete(this.req.get('Call-ID'));
|
|
this._setDlgHandlers(dlg);
|
|
} catch (err) {
|
|
this.logger.error({err}, 'Error creating new call leg for REFER');
|
|
sendNotify(this.uas, `${err.status || 500} ${err.reason || ''}`);
|
|
}
|
|
}
|
|
else {
|
|
/* REFER coming in from a sip device, forward to feature server */
|
|
try {
|
|
const response = await dlg.other.request({
|
|
method: 'REFER',
|
|
headers: {
|
|
'Refer-To': req.get('Refer-To'),
|
|
'Referred-By': req.get('Referred-By'),
|
|
'User-Agent': req.get('User-Agent')
|
|
}
|
|
});
|
|
res.send(response.status, response.reason);
|
|
} catch (err) {
|
|
this.logger.error({err}, 'CallSession:_onRefer: error handling incoming REFER');
|
|
}
|
|
}
|
|
}
|
|
|
|
}
|
|
|
|
module.exports = CallSession;
|