320 lines
10 KiB
JavaScript
320 lines
10 KiB
JavaScript
import { NativeModules } from 'react-native';
|
|
import { RTCPeerConnection, RTCSessionDescription } from 'react-native-webrtc';
|
|
|
|
// XXX At the time of this writing extending RTCPeerConnection using ES6 'class'
|
|
// and 'extends' causes a runtime error related to the attempt to define the
|
|
// onaddstream property setter. The error mentions that babelHelpers.set is
|
|
// undefined which appears to be a thing inside React Native's packager. As a
|
|
// workaround, extend using the pre-ES6 way.
|
|
|
|
/**
|
|
* The RTCPeerConnection provided by react-native-webrtc fires onaddstream
|
|
* before it remembers remotedescription (and thus makes it available to API
|
|
* clients). Because that appears to be a problem for lib-jitsi-meet which has
|
|
* been successfully running on Chrome, Firefox, Temasys, etc. for a very long
|
|
* time, attempt to meets its expectations (by extending RTCPPeerConnection).
|
|
*
|
|
* @class
|
|
*/
|
|
export default function _RTCPeerConnection(...args) {
|
|
|
|
/* eslint-disable no-invalid-this */
|
|
|
|
RTCPeerConnection.apply(this, args);
|
|
|
|
this.onaddstream = (...args) => // eslint-disable-line no-shadow
|
|
(this._onaddstreamQueue
|
|
? this._queueOnaddstream
|
|
: this._invokeOnaddstream)
|
|
.apply(this, args);
|
|
|
|
// Shadow RTCPeerConnection's onaddstream but after _RTCPeerConnection has
|
|
// assigned to the property in question. Defining the property on
|
|
// _RTCPeerConnection's prototype may (or may not, I don't know) work but I
|
|
// don't want to try because the following approach appears to work and I
|
|
// understand it.
|
|
Object.defineProperty(this, 'onaddstream', {
|
|
configurable: true,
|
|
enumerable: true,
|
|
get() {
|
|
return this._onaddstream;
|
|
},
|
|
set(value) {
|
|
this._onaddstream = value;
|
|
}
|
|
});
|
|
|
|
/* eslint-enable no-invalid-this */
|
|
}
|
|
|
|
_RTCPeerConnection.prototype = Object.create(RTCPeerConnection.prototype);
|
|
_RTCPeerConnection.prototype.constructor = _RTCPeerConnection;
|
|
|
|
_RTCPeerConnection.prototype._invokeOnaddstream = function(...args) {
|
|
const onaddstream = this._onaddstream;
|
|
|
|
return onaddstream && onaddstream.apply(this, args);
|
|
};
|
|
|
|
_RTCPeerConnection.prototype._invokeQueuedOnaddstream = function(q) {
|
|
q && q.forEach(args => {
|
|
try {
|
|
this._invokeOnaddstream(...args);
|
|
} catch (e) {
|
|
// TODO Determine whether the combination of the standard
|
|
// setRemoteDescription and onaddstream results in a similar
|
|
// swallowing of errors.
|
|
_LOGE(e);
|
|
}
|
|
});
|
|
};
|
|
|
|
_RTCPeerConnection.prototype._queueOnaddstream = function(...args) {
|
|
this._onaddstreamQueue.push(Array.from(args));
|
|
};
|
|
|
|
_RTCPeerConnection.prototype.setRemoteDescription = function(
|
|
sessionDescription,
|
|
successCallback,
|
|
errorCallback) {
|
|
// If the deprecated callback-based version is used, translate it to the
|
|
// Promise-based version.
|
|
if (typeof successCallback !== 'undefined'
|
|
|| typeof errorCallback !== 'undefined') {
|
|
// XXX Returning a Promise is not necessary. But I don't see why it'd
|
|
// hurt (much).
|
|
return (
|
|
_RTCPeerConnection.prototype.setRemoteDescription.call(
|
|
this,
|
|
sessionDescription)
|
|
.then(successCallback, errorCallback));
|
|
}
|
|
|
|
return (
|
|
_synthesizeIPv6Addresses(sessionDescription)
|
|
.catch(reason => {
|
|
reason && _LOGE(reason);
|
|
|
|
return sessionDescription;
|
|
})
|
|
.then(value => _setRemoteDescription.bind(this)(value)));
|
|
|
|
};
|
|
|
|
/**
|
|
* Logs at error level.
|
|
*
|
|
* @private
|
|
* @returns {void}
|
|
*/
|
|
function _LOGE(...args) {
|
|
console && console.error && console.error(...args);
|
|
}
|
|
|
|
/**
|
|
* Adapts react-native-webrtc's {@link RTCPeerConnection#setRemoteDescription}
|
|
* implementation which uses the deprecated, callback-based version to the
|
|
* <tt>Promise</tt>-based version.
|
|
*
|
|
* @param {RTCSessionDescription} sessionDescription - The RTCSessionDescription
|
|
* which specifies the configuration of the remote end of the connection.
|
|
* @private
|
|
* @private
|
|
* @returns {Promise}
|
|
*/
|
|
function _setRemoteDescription(sessionDescription) {
|
|
return new Promise((resolve, reject) => {
|
|
|
|
/* eslint-disable no-invalid-this */
|
|
|
|
// Ensure I'm not remembering onaddstream invocations from previous
|
|
// setRemoteDescription calls. I shouldn't be but... anyway.
|
|
this._onaddstreamQueue = [];
|
|
|
|
RTCPeerConnection.prototype.setRemoteDescription.call(
|
|
this,
|
|
sessionDescription,
|
|
(...args) => {
|
|
let q;
|
|
|
|
try {
|
|
resolve(...args);
|
|
} finally {
|
|
q = this._onaddstreamQueue;
|
|
this._onaddstreamQueue = undefined;
|
|
}
|
|
|
|
this._invokeQueuedOnaddstream(q);
|
|
},
|
|
(...args) => {
|
|
this._onaddstreamQueue = undefined;
|
|
|
|
reject(...args);
|
|
});
|
|
|
|
/* eslint-enable no-invalid-this */
|
|
});
|
|
}
|
|
|
|
/**
|
|
* Synthesize IPv6 addresses on iOS in order to support IPv6 NAT64 networks.
|
|
*
|
|
* @param {RTCSessionDescription} sdp - The RTCSessionDescription which
|
|
* specifies the configuration of the remote end of the connection.
|
|
* @private
|
|
* @returns {Promise}
|
|
*/
|
|
function _synthesizeIPv6Addresses(sdp) {
|
|
// The synthesis of IPv6 addresses is implemented on iOS only at the time of
|
|
// this writing.
|
|
if (!NativeModules.POSIX) {
|
|
return Promise.resolve(sdp);
|
|
}
|
|
|
|
return (
|
|
new Promise(resolve => resolve(_synthesizeIPv6Addresses0(sdp)))
|
|
.then(({ ips, lines }) =>
|
|
Promise.all(Array.from(ips.values()))
|
|
.then(() => _synthesizeIPv6Addresses1(sdp, ips, lines))
|
|
));
|
|
}
|
|
|
|
/* eslint-disable max-depth */
|
|
|
|
/**
|
|
* Implements the initial phase of the synthesis of IPv6 addresses.
|
|
*
|
|
* @param {RTCSessionDescription} sessionDescription - The RTCSessionDescription
|
|
* for which IPv6 addresses will be synthesized.
|
|
* @private
|
|
* @returns {{
|
|
* ips: Map,
|
|
* lines: Array
|
|
* }}
|
|
*/
|
|
function _synthesizeIPv6Addresses0(sessionDescription) {
|
|
const sdp = sessionDescription.sdp;
|
|
let start = 0;
|
|
const lines = [];
|
|
const ips = new Map();
|
|
const getaddrinfo = NativeModules.POSIX.getaddrinfo;
|
|
|
|
do {
|
|
const end = sdp.indexOf('\r\n', start);
|
|
let line;
|
|
|
|
if (end === -1) {
|
|
line = sdp.substring(start);
|
|
|
|
// Break out of the loop at the end of the iteration.
|
|
start = undefined;
|
|
} else {
|
|
line = sdp.substring(start, end);
|
|
start = end + 2;
|
|
}
|
|
|
|
if (line.startsWith('a=candidate:')) {
|
|
const candidate = line.split(' ');
|
|
|
|
if (candidate.length >= 10 && candidate[6] === 'typ') {
|
|
const ip4s = [ candidate[4] ];
|
|
let abort = false;
|
|
|
|
for (let i = 8; i < candidate.length; ++i) {
|
|
if (candidate[i] === 'raddr') {
|
|
ip4s.push(candidate[++i]);
|
|
break;
|
|
}
|
|
}
|
|
|
|
for (const ip of ip4s) {
|
|
if (ip.indexOf(':') === -1) {
|
|
ips.has(ip)
|
|
|| ips.set(ip, new Promise((resolve, reject) => {
|
|
const v = ips.get(ip);
|
|
|
|
if (v && typeof v === 'string') {
|
|
resolve(v);
|
|
} else {
|
|
getaddrinfo(ip).then(
|
|
value => {
|
|
if (value.indexOf(':') === -1
|
|
|| value === ips.get(ip)) {
|
|
ips.delete(ip);
|
|
} else {
|
|
ips.set(ip, value);
|
|
}
|
|
resolve(value);
|
|
},
|
|
reject);
|
|
}
|
|
}));
|
|
} else {
|
|
abort = true;
|
|
break;
|
|
}
|
|
}
|
|
if (abort) {
|
|
ips.clear();
|
|
break;
|
|
}
|
|
|
|
line = candidate;
|
|
}
|
|
}
|
|
|
|
lines.push(line);
|
|
} while (start);
|
|
|
|
return {
|
|
ips,
|
|
lines
|
|
};
|
|
}
|
|
|
|
/* eslint-enable max-depth */
|
|
|
|
/**
|
|
* Implements the initial phase of the synthesis of IPv6 addresses.
|
|
*
|
|
* @param {RTCSessionDescription} sessionDescription - The RTCSessionDescription
|
|
* for which IPv6 addresses are being synthesized.
|
|
* @param {Map} ips - A Map of IPv4 addresses found in the specified
|
|
* sessionDescription to synthesized IPv6 addresses.
|
|
* @param {Array} lines - The lines of the specified sessionDescription.
|
|
* @private
|
|
* @returns {RTCSessionDescription} A RTCSessionDescription that represents the
|
|
* result of the synthesis of IPv6 addresses.
|
|
*/
|
|
function _synthesizeIPv6Addresses1(sessionDescription, ips, lines) {
|
|
if (ips.size === 0) {
|
|
return sessionDescription;
|
|
}
|
|
|
|
for (let l = 0; l < lines.length; ++l) {
|
|
const candidate = lines[l];
|
|
|
|
if (typeof candidate !== 'string') {
|
|
let ip4 = candidate[4];
|
|
let ip6 = ips.get(ip4);
|
|
|
|
ip6 && (candidate[4] = ip6);
|
|
|
|
for (let i = 8; i < candidate.length; ++i) {
|
|
if (candidate[i] === 'raddr') {
|
|
ip4 = candidate[++i];
|
|
(ip6 = ips.get(ip4)) && (candidate[i] = ip6);
|
|
break;
|
|
}
|
|
}
|
|
|
|
lines[l] = candidate.join(' ');
|
|
}
|
|
}
|
|
|
|
return new RTCSessionDescription({
|
|
sdp: lines.join('\r\n'),
|
|
type: sessionDescription.type
|
|
});
|
|
}
|