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/* jshint moz:true, browser:true */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
"use strict";
const { Services } = ChromeUtils.import("resource://gre/modules/Services.jsm");
ChromeUtils.defineModuleGetter(
this,
"PeerConnectionIdp",
);
const PC_CONTRACT = "@mozilla.org/dom/peerconnection;1";
const PC_OBS_CONTRACT = "@mozilla.org/dom/peerconnectionobserver;1";
const PC_ICE_CONTRACT = "@mozilla.org/dom/rtcicecandidate;1";
const PC_SESSION_CONTRACT = "@mozilla.org/dom/rtcsessiondescription;1";
const PC_STATIC_CONTRACT = "@mozilla.org/dom/peerconnectionstatic;1";
const PC_SENDER_CONTRACT = "@mozilla.org/dom/rtpsender;1";
const PC_TRANSCEIVER_CONTRACT = "@mozilla.org/dom/rtptransceiver;1";
const PC_COREQUEST_CONTRACT = "@mozilla.org/dom/createofferrequest;1";
const PC_CID = Components.ID("{bdc2e533-b308-4708-ac8e-a8bfade6d851}");
const PC_OBS_CID = Components.ID("{d1748d4c-7f6a-4dc5-add6-d55b7678537e}");
const PC_ICE_CID = Components.ID("{02b9970c-433d-4cc2-923d-f7028ac66073}");
const PC_SESSION_CID = Components.ID("{1775081b-b62d-4954-8ffe-a067bbf508a7}");
const PC_MANAGER_CID = Components.ID("{7293e901-2be3-4c02-b4bd-cbef6fc24f78}");
const PC_STATIC_CID = Components.ID("{0fb47c47-a205-4583-a9fc-cbadf8c95880}");
const PC_SENDER_CID = Components.ID("{4fff5d46-d827-4cd4-a970-8fd53977440e}");
const PC_TRANSCEIVER_CID = Components.ID(
"{09475754-103a-41f5-a2d0-e1f27eb0b537}"
);
const PC_COREQUEST_CID = Components.ID(
"{74b2122d-65a8-4824-aa9e-3d664cb75dc2}"
);
function logMsg(msg, file, line, flag, winID) {
let scriptErrorClass = Cc["@mozilla.org/scripterror;1"];
let scriptError = scriptErrorClass.createInstance(Ci.nsIScriptError);
scriptError.initWithWindowID(
`WebRTC: ${msg}`,
file,
null,
line,
0,
flag,
"content javascript",
winID
);
Services.console.logMessage(scriptError);
}
let setupPrototype = (_class, dict) => {
_class.prototype.classDescription = _class.name;
Object.assign(_class.prototype, dict);
};
// Global list of PeerConnection objects, so they can be cleaned up when
// a page is torn down. (Maps inner window ID to an array of PC objects).
class GlobalPCList {
constructor() {
this._list = {};
this._networkdown = false; // XXX Need to query current state somehow
this._lifecycleobservers = {};
this._nextId = 1;
Services.obs.addObserver(this, "inner-window-destroyed", true);
Services.obs.addObserver(this, "profile-change-net-teardown", true);
Services.obs.addObserver(this, "network:offline-about-to-go-offline", true);
Services.obs.addObserver(this, "network:offline-status-changed", true);
Services.obs.addObserver(this, "gmp-plugin-crash", true);
Services.obs.addObserver(this, "PeerConnection:response:allow", true);
Services.obs.addObserver(this, "PeerConnection:response:deny", true);
if (Services.cpmm) {
Services.cpmm.addMessageListener("gmp-plugin-crash", this);
}
}
notifyLifecycleObservers(pc, type) {
for (var key of Object.keys(this._lifecycleobservers)) {
this._lifecycleobservers[key](pc, pc._winID, type);
}
}
addPC(pc) {
let winID = pc._winID;
if (this._list[winID]) {
this._list[winID].push(Cu.getWeakReference(pc));
} else {
this._list[winID] = [Cu.getWeakReference(pc)];
}
pc._globalPCListId = this._nextId++;
this.removeNullRefs(winID);
}
findPC(globalPCListId) {
for (let winId in this._list) {
if (this._list.hasOwnProperty(winId)) {
for (let pcref of this._list[winId]) {
let pc = pcref.get();
if (pc && pc._globalPCListId == globalPCListId) {
return pc;
}
}
}
}
return null;
}
removeNullRefs(winID) {
if (this._list[winID] === undefined) {
return;
}
this._list[winID] = this._list[winID].filter(function(e, i, a) {
return e.get() !== null;
});
if (this._list[winID].length === 0) {
delete this._list[winID];
}
}
handleGMPCrash(data) {
let broadcastPluginCrash = function(list, winID, pluginID, pluginName) {
if (list.hasOwnProperty(winID)) {
list[winID].forEach(function(pcref) {
let pc = pcref.get();
if (pc) {
pc._pc.pluginCrash(pluginID, pluginName);
}
});
}
};
// a plugin crashed; if it's associated with any of our PCs, fire an
// event to the DOM window
for (let winId in this._list) {
broadcastPluginCrash(this._list, winId, data.pluginID, data.pluginName);
}
}
receiveMessage({ name, data }) {
if (name == "gmp-plugin-crash") {
this.handleGMPCrash(data);
}
}
observe(subject, topic, data) {
let cleanupPcRef = function(pcref) {
let pc = pcref.get();
if (pc) {
pc._suppressEvents = true;
pc.close();
}
};
let cleanupWinId = function(list, winID) {
if (list.hasOwnProperty(winID)) {
list[winID].forEach(cleanupPcRef);
delete list[winID];
}
};
if (topic == "inner-window-destroyed") {
let winID = subject.QueryInterface(Ci.nsISupportsPRUint64).data;
cleanupWinId(this._list, winID);
if (this._lifecycleobservers.hasOwnProperty(winID)) {
delete this._lifecycleobservers[winID];
}
} else if (
topic == "profile-change-net-teardown" ||
topic == "network:offline-about-to-go-offline"
) {
// As Necko doesn't prevent us from accessing the network we still need to
// monitor the network offline/online state here. See bug 1326483
this._networkdown = true;
} else if (topic == "network:offline-status-changed") {
if (data == "offline") {
this._networkdown = true;
} else if (data == "online") {
this._networkdown = false;
}
} else if (topic == "gmp-plugin-crash") {
if (subject instanceof Ci.nsIWritablePropertyBag2) {
let pluginID = subject.getPropertyAsUint32("pluginID");
let pluginName = subject.getPropertyAsAString("pluginName");
let data = { pluginID, pluginName };
this.handleGMPCrash(data);
}
} else if (
topic == "PeerConnection:response:allow" ||
topic == "PeerConnection:response:deny"
) {
var pc = this.findPC(data);
if (pc) {
if (topic == "PeerConnection:response:allow") {
pc._settlePermission.allow();
} else {
let err = new pc._win.DOMException(
"The request is not allowed by " +
"the user agent or the platform in the current context.",
"NotAllowedError"
);
pc._settlePermission.deny(err);
}
}
}
}
_registerPeerConnectionLifecycleCallback(winID, cb) {
this._lifecycleobservers[winID] = cb;
}
}
setupPrototype(GlobalPCList, {
QueryInterface: ChromeUtils.generateQI([
"nsIObserver",
"nsISupportsWeakReference",
]),
classID: PC_MANAGER_CID,
_xpcom_factory: {
createInstance(outer, iid) {
if (outer) {
throw Components.Exception("", Cr.NS_ERROR_NO_AGGREGATION);
}
return _globalPCList.QueryInterface(iid);
},
},
});
var _globalPCList = new GlobalPCList();
class RTCIceCandidate {
init(win) {
this._win = win;
}
__init(dict) {
if (dict.sdpMid == null && dict.sdpMLineIndex == null) {
throw new this._win.TypeError(
"Either sdpMid or sdpMLineIndex must be specified"
);
}
Object.assign(this, dict);
}
}
setupPrototype(RTCIceCandidate, {
classID: PC_ICE_CID,
contractID: PC_ICE_CONTRACT,
QueryInterface: ChromeUtils.generateQI(["nsIDOMGlobalPropertyInitializer"]),
});
class RTCSessionDescription {
init(win) {
this._win = win;
this._winID = this._win.windowGlobalChild.innerWindowId;
}
__init({ type, sdp }) {
if (!type) {
throw new this._win.TypeError(
"Missing required 'type' member of RTCSessionDescriptionInit"
);
}
Object.assign(this, { _type: type, _sdp: sdp });
}
get type() {
return this._type;
}
set type(type) {
this.warn();
this._type = type;
}
get sdp() {
return this._sdp;
}
set sdp(sdp) {
this.warn();
this._sdp = sdp;
}
warn() {
if (!this._warned) {
// Warn once per RTCSessionDescription about deprecated writable usage.
this.logWarning(
"RTCSessionDescription's members are readonly! " +
"Writing to them is deprecated and will break soon!"
);
this._warned = true;
}
}
logWarning(msg) {
let err = this._win.Error();
logMsg(
msg,
err.fileName,
err.lineNumber,
Ci.nsIScriptError.warningFlag,
this._winID
);
}
}
setupPrototype(RTCSessionDescription, {
classID: PC_SESSION_CID,
contractID: PC_SESSION_CONTRACT,
QueryInterface: ChromeUtils.generateQI(["nsIDOMGlobalPropertyInitializer"]),
});
// Records PC related telemetry
class PeerConnectionTelemetry {
// ICE connection state enters connected or completed.
recordConnected() {
Services.telemetry.scalarAdd("webrtc.peerconnection.connected", 1);
this.recordConnected = () => {};
}
// DataChannel is created
_recordDataChannelCreated() {
Services.telemetry.scalarAdd(
"webrtc.peerconnection.datachannel_created",
1
);
this._recordDataChannelCreated = () => {};
}
// DataChannel initialized with maxRetransmitTime
_recordMaxRetransmitTime(maxRetransmitTime) {
if (maxRetransmitTime === undefined) {
return false;
}
Services.telemetry.scalarAdd(
"webrtc.peerconnection.datachannel_max_retx_used",
1
);
this._recordMaxRetransmitTime = () => true;
return true;
}
// DataChannel initialized with maxPacketLifeTime
_recordMaxPacketLifeTime(maxPacketLifeTime) {
if (maxPacketLifeTime === undefined) {
return false;
}
Services.telemetry.scalarAdd(
"webrtc.peerconnection.datachannel_max_life_used",
1
);
this._recordMaxPacketLifeTime = () => true;
return true;
}
// DataChannel initialized
recordDataChannelInit(maxRetransmitTime, maxPacketLifeTime) {
const retxUsed = this._recordMaxRetransmitTime(maxRetransmitTime);
if (this._recordMaxPacketLifeTime(maxPacketLifeTime) && retxUsed) {
Services.telemetry.scalarAdd(
"webrtc.peerconnection.datachannel_max_retx_and_life_used",
1
);
this.recordDataChannelInit = () => {};
}
this._recordDataChannelCreated();
}
}
class RTCPeerConnection {
constructor() {
this._transceivers = [];
this._pc = null;
this._closed = false;
// canTrickle == null means unknown; when a remote description is received it
// is set to true or false based on the presence of the "trickle" ice-option
this._canTrickle = null;
this._localUfragsToReplace = new Set();
// So we can record telemetry on state transitions
this._iceConnectionState = "new";
this._hasStunServer = this._hasTurnServer = false;
this._iceGatheredRelayCandidates = false;
// Records telemetry
this._pcTelemetry = new PeerConnectionTelemetry();
}
init(win) {
this._win = win;
}
__init(rtcConfig) {
this._winID = this._win.windowGlobalChild.innerWindowId;
// TODO: Update this code once we support pc.setConfiguration, to track
// setting from content independently from pref (Bug 1181768).
if (
rtcConfig.iceTransportPolicy == "all" &&
Services.prefs.getBoolPref("media.peerconnection.ice.relay_only")
) {
rtcConfig.iceTransportPolicy = "relay";
}
if ("sdpSemantics" in rtcConfig) {
if (rtcConfig.sdpSemantics == "plan-b") {
this.logWarning(
`Outdated and non-standard {sdpSemantics: "plan-b"} is not ` +
`supported! WebRTC may be unreliable. Please update code to ` +
`follow standard "unified-plan".`
);
}
// Don't let it show up in getConfiguration.
delete rtcConfig.sdpSemantics;
}
this._config = Object.assign({}, rtcConfig);
if (
!rtcConfig.iceServers ||
!Services.prefs.getBoolPref(
"media.peerconnection.use_document_iceservers"
)
) {
try {
rtcConfig.iceServers = JSON.parse(
Services.prefs.getCharPref(
"media.peerconnection.default_iceservers"
) || "[]"
);
} catch (e) {
this.logWarning(
"Ignoring invalid media.peerconnection.default_iceservers in about:config"
);
rtcConfig.iceServers = [];
}
try {
this._mustValidateRTCConfiguration(
rtcConfig,
"Ignoring invalid media.peerconnection.default_iceservers in about:config"
);
} catch (e) {
this.logWarning(e.message);
rtcConfig.iceServers = [];
}
} else {
// This gets executed in the typical case when iceServers
// are passed in through the web page.
this._mustValidateRTCConfiguration(
rtcConfig,
"RTCPeerConnection constructor passed invalid RTCConfiguration"
);
}
let certificates = rtcConfig.certificates || [];
if (certificates.some(c => c.expires <= Date.now())) {
throw new this._win.DOMException(
"Unable to create RTCPeerConnection with an expired certificate",
"InvalidAccessError"
);
}
// TODO(bug 1531875): Check origin of certs
// TODO(bug 1176518): Remove this code once we support multiple certs
let certificate;
if (certificates.length == 1) {
certificate = certificates[0];
} else if (certificates.length) {
throw new this._win.DOMException(
"RTCPeerConnection does not currently support multiple certificates",
"NotSupportedError"
);
}
this._documentPrincipal = Cu.getWebIDLCallerPrincipal();
if (_globalPCList._networkdown) {
throw new this._win.DOMException(
"Can't create RTCPeerConnections when the network is down",
"InvalidStateError"
);
}
this.makeGetterSetterEH("ontrack");
this.makeLegacyGetterSetterEH(
"onaddstream",
"Use peerConnection.ontrack instead."
);
this.makeLegacyGetterSetterEH(
"onaddtrack",
"Use peerConnection.ontrack instead."
);
this.makeGetterSetterEH("onicecandidate");
this.makeGetterSetterEH("onnegotiationneeded");
this.makeGetterSetterEH("onsignalingstatechange");
this.makeGetterSetterEH("ondatachannel");
this.makeGetterSetterEH("oniceconnectionstatechange");
this.makeGetterSetterEH("onicegatheringstatechange");
this.makeGetterSetterEH("onidentityresult");
this.makeGetterSetterEH("onpeeridentity");
this.makeGetterSetterEH("onidpassertionerror");
this.makeGetterSetterEH("onidpvalidationerror");
this._pc = new this._win.PeerConnectionImpl();
this._operations = [];
this._updateNegotiationNeededOnEmptyChain = false;
this.__DOM_IMPL__._innerObject = this;
const observer = new this._win.PeerConnectionObserver(this.__DOM_IMPL__);
// Add a reference to the PeerConnection to global list (before init).
_globalPCList.addPC(this);
this._impl.initialize(
observer,
this._win,
rtcConfig,
Services.tm.currentThread
);
this._certificateReady = this._initCertificate(certificate);
this._initIdp();
_globalPCList.notifyLifecycleObservers(this, "initialized");
}
get _impl() {
if (!this._pc) {
throw new this._win.DOMException(
"RTCPeerConnection is gone (did you enter Offline mode?)",
"InvalidStateError"
);
}
return this._pc;
}
getConfiguration() {
return this._config;
}
async _initCertificate(certificate) {
if (!certificate) {
certificate = await this._win.RTCPeerConnection.generateCertificate({
name: "ECDSA",
namedCurve: "P-256",
});
}
// Is the PC still around after the await?
if (!this._closed) {
this._impl.certificate = certificate;
}
}
_resetPeerIdentityPromise() {
this._peerIdentity = new this._win.Promise((resolve, reject) => {
this._resolvePeerIdentity = resolve;
this._rejectPeerIdentity = reject;
});
}
_initIdp() {
this._resetPeerIdentityPromise();
this._lastIdentityValidation = this._win.Promise.resolve();
let prefName = "media.peerconnection.identity.timeout";
let idpTimeout = Services.prefs.getIntPref(prefName);
this._localIdp = new PeerConnectionIdp(this._win, idpTimeout);
this._remoteIdp = new PeerConnectionIdp(this._win, idpTimeout);
}
// Add a function to the internal operations chain.
_chain(operation) {
let resolveP, rejectP;
const p = new Promise((r, e) => {
resolveP = r;
rejectP = e;
});
this._operations.push(() => {
operation().then(resolveP, rejectP);
const doNextOperation = () => {
if (this._closed) {
return;
}
this._operations.shift();
if (this._operations.length) {
this._operations[0]();
} else if (this._updateNegotiationNeededOnEmptyChain) {
this._updateNegotiationNeededOnEmptyChain = false;
this.updateNegotiationNeeded();
}
};
p.then(doNextOperation, doNextOperation);
});
if (this._operations.length == 1) {
this._operations[0]();
}
return p;
}
// It's basically impossible to use async directly in JSImplemented code,
// because the implicit promise must be wrapped to the right type for content.
//
// The _async wrapper takes care of this. The _legacy wrapper implements
// legacy callbacks in a manner that produces correct line-numbers in errors,
// provided that methods validate their inputs before putting themselves on
// the pc's operations chain.
//
// These wrappers also serve as guards against settling promises past close().
_async(func) {
return this._win.Promise.resolve(this._closeWrapper(func));
}
_legacy(...args) {
return this._win.Promise.resolve(this._legacyCloseWrapper(...args));
}
_auto(onSucc, onErr, func) {
return typeof onSucc == "function"
? this._legacy(onSucc, onErr, func)
: this._async(func);
}
async _closeWrapper(func) {
let closed = this._closed;
try {
let result = await func();
if (!closed && this._closed) {
await new Promise(() => {});
}
return result;
} catch (e) {
if (!closed && this._closed) {
await new Promise(() => {});
}
throw e;
}
}
async _legacyCloseWrapper(onSucc, onErr, func) {
let wrapCallback = cb => result => {
try {
cb && cb(result);
} catch (e) {
this.logErrorAndCallOnError(e);
}
};
try {
wrapCallback(onSucc)(await func());
} catch (e) {
wrapCallback(onErr)(e);
}
}
// This implements the fairly common "Queue a task" logic
async _queueTaskWithClosedCheck(func) {
const pc = this;
return new this._win.Promise((resolve, reject) => {
Services.tm.dispatchToMainThread({
run() {
try {
if (!pc._closed) {
func();
resolve();
}
} catch (e) {
reject(e);
}
},
});
});
}
/**
* An RTCConfiguration may look like this:
*
* { "iceServers": [ { urls: "stun:stun.example.org", },
* { url: "stun:stun.example.org", }, // deprecated version
* { urls: ["turn:turn1.x.org", "turn:turn2.x.org"],
* username:"jib", credential:"mypass"} ] }
*
* This function normalizes the structure of the input for rtcConfig.iceServers for us,
* so we test well-formed stun/turn urls before passing along to C++.
* msg - Error message to detail which array-entry failed, if any.
*/
_mustValidateRTCConfiguration({ iceServers }, msg) {
// Normalize iceServers input
iceServers.forEach(server => {
if (typeof server.urls === "string") {
server.urls = [server.urls];
} else if (!server.urls && server.url) {
// TODO: Remove support for legacy iceServer.url eventually (Bug 1116766)
server.urls = [server.url];
this.logWarning("RTCIceServer.url is deprecated! Use urls instead.");
}
});
let nicerNewURI = uriStr => {
try {
return Services.io.newURI(uriStr);
} catch (e) {
if (e.result == Cr.NS_ERROR_MALFORMED_URI) {
throw new this._win.DOMException(
`${msg} - malformed URI: ${uriStr}`,
"SyntaxError"
);
}
throw e;
}
};
var stunServers = 0;
iceServers.forEach(({ urls, username, credential, credentialType }) => {
if (!urls) {
// TODO: Remove once url is deprecated (Bug 1369563)
throw new this._win.TypeError(
"Missing required 'urls' member of RTCIceServer"
);
}
if (urls.length == 0) {
throw new this._win.DOMException(
`${msg} - urls is empty`,
"SyntaxError"
);
}
urls
.map(url => nicerNewURI(url))
.forEach(({ scheme, spec }) => {
if (scheme in { turn: 1, turns: 1 }) {
if (username == undefined) {
throw new this._win.DOMException(
`${msg} - missing username: ${spec}`,
"InvalidAccessError"
);
}
if (username.length > 512) {
throw new this._win.DOMException(
`${msg} - username longer then 512 bytes: ${username}`,
"InvalidAccessError"
);
}
if (credential == undefined) {
throw new this._win.DOMException(
`${msg} - missing credential: ${spec}`,
"InvalidAccessError"
);
}
if (credentialType != "password") {
this.logWarning(
`RTCConfiguration TURN credentialType \"${credentialType}\"` +
" is not yet implemented. Treating as password." +
);
}
this._hasTurnServer = true;
stunServers += 1;
} else if (scheme in { stun: 1, stuns: 1 }) {
this._hasStunServer = true;
stunServers += 1;
} else {
throw new this._win.DOMException(
`${msg} - improper scheme: ${scheme}`,
"SyntaxError"
);
}
if (scheme in { stuns: 1 }) {
this.logWarning(scheme.toUpperCase() + " is not yet supported.");
}
if (stunServers >= 5) {
this.logError(
"Using five or more STUN/TURN servers causes problems"
);
} else if (stunServers > 2) {
this.logWarning(
"Using more than two STUN/TURN servers slows down discovery"
);
}
});
});
}
// Ideally, this should be of the form _checkState(state),
// where the state is taken from an enumeration containing
// the valid peer connection states defined in the WebRTC
// spec. See Bug 831756.
_checkClosed() {
if (this._closed) {
throw new this._win.DOMException(
"Peer connection is closed",
"InvalidStateError"
);
}
}
dispatchEvent(event) {
// PC can close while events are firing if there is an async dispatch
// in c++ land. But let through "closed" signaling and ice connection events.
if (!this._suppressEvents) {
this.__DOM_IMPL__.dispatchEvent(event);
}
}
// Log error message to web console and window.onerror, if present.
logErrorAndCallOnError(e) {
this.logMsg(
e.message,
e.fileName,
e.lineNumber,
Ci.nsIScriptError.errorFlag
);
// Safely call onerror directly if present (necessary for testing)
try {
if (typeof this._win.onerror === "function") {
this._win.onerror(e.message, e.fileName, e.lineNumber);
}
} catch (e) {
// If onerror itself throws, service it.
try {
this.logMsg(
e.message,
e.fileName,
e.lineNumber,
Ci.nsIScriptError.errorFlag
);
} catch (e) {}
}
}
logError(msg) {
this.logStackMsg(msg, Ci.nsIScriptError.errorFlag);
}
logWarning(msg) {
this.logStackMsg(msg, Ci.nsIScriptError.warningFlag);
}
logStackMsg(msg, flag) {
let err = this._win.Error();
this.logMsg(msg, err.fileName, err.lineNumber, flag);
}
logMsg(msg, file, line, flag) {
return logMsg(msg, file, line, flag, this._winID);
}
getEH(type) {
return this.__DOM_IMPL__.getEventHandler(type);
}
setEH(type, handler) {
this.__DOM_IMPL__.setEventHandler(type, handler);
}
makeGetterSetterEH(name) {
Object.defineProperty(this, name, {
get() {
return this.getEH(name);
},
set(h) {
return this.setEH(name, h);
},
});
}
makeLegacyGetterSetterEH(name, msg) {
Object.defineProperty(this, name, {
get() {
return this.getEH(name);
},
set(h) {
this.logWarning(name + " is deprecated! " + msg);
return this.setEH(name, h);
},
});
}
createOffer(optionsOrOnSucc, onErr, options) {
let onSuccess = null;
if (typeof optionsOrOnSucc == "function") {
onSuccess = optionsOrOnSucc;
} else {
options = optionsOrOnSucc;
}
if (this._localUfragsToReplace.size > 0) {
options.iceRestart = true;
}
// This entry-point handles both new and legacy call sig. Decipher which one
if (onSuccess) {
return this._legacy(onSuccess, onErr, () => this._createOffer(options));
}
return this._async(() => this._createOffer(options));
}
// Ensures that we have at least one transceiver of |kind| that is
// configured to receive. It will create one if necessary.
_ensureOfferToReceive(kind) {
let hasRecv = this._transceivers.some(
transceiver =>
transceiver.getKind() == kind &&
(transceiver.direction == "sendrecv" ||
transceiver.direction == "recvonly") &&
!transceiver.stopped
);
if (!hasRecv) {
this._addTransceiverNoEvents(kind, { direction: "recvonly" });
}
}
// Handles offerToReceiveAudio/Video
_ensureTransceiversForOfferToReceive(options) {
if (options.offerToReceiveAudio) {
this._ensureOfferToReceive("audio");
}
if (options.offerToReceiveVideo) {
this._ensureOfferToReceive("video");
}
this._transceivers
.filter(transceiver => {
return (
(options.offerToReceiveVideo === false &&
transceiver.receiver.track.kind == "video") ||
(options.offerToReceiveAudio === false &&
transceiver.receiver.track.kind == "audio")
);
})
.forEach(transceiver => {
if (transceiver.direction == "sendrecv") {
transceiver.setDirectionInternal("sendonly");
} else if (transceiver.direction == "recvonly") {
transceiver.setDirectionInternal("inactive");
}
});
}
_createOffer(options) {
this._checkClosed();
this._ensureTransceiversForOfferToReceive(options);
this._syncTransceivers();
return this._chain(() => this._createAnOffer(options));
}
async _createAnOffer(options = {}) {
switch (this.signalingState) {
case "stable":
case "have-local-offer":
break;
default:
throw new this._win.DOMException(
`Cannot create offer in ${this.signalingState}`,
"InvalidStateError"
);
}
let haveAssertion;
if (this._localIdp.enabled) {
haveAssertion = this._getIdentityAssertion();
}
await this._getPermission();
await this._certificateReady;
let sdp = await new Promise((resolve, reject) => {
this._onCreateOfferSuccess = resolve;
this._onCreateOfferFailure = reject;
this._impl.createOffer(options);
});
if (haveAssertion) {
await haveAssertion;
sdp = this._localIdp.addIdentityAttribute(sdp);
}
return Cu.cloneInto({ type: "offer", sdp }, this._win);
}
createAnswer(optionsOrOnSucc, onErr) {
// This entry-point handles both new and legacy call sig. Decipher which one
if (typeof optionsOrOnSucc == "function") {
return this._legacy(optionsOrOnSucc, onErr, () => this._createAnswer({}));
}
return this._async(() => this._createAnswer(optionsOrOnSucc));
}
_createAnswer(options) {
this._checkClosed();
this._syncTransceivers();
return this._chain(() => this._createAnAnswer());
}
async _createAnAnswer() {
if (this.signalingState != "have-remote-offer") {
throw new this._win.DOMException(
`Cannot create answer in ${this.signalingState}`,
"InvalidStateError"
);
}
let haveAssertion;
if (this._localIdp.enabled) {
haveAssertion = this._getIdentityAssertion();
}
await this._getPermission();
await this._certificateReady;
let sdp = await new Promise((resolve, reject) => {
this._onCreateAnswerSuccess = resolve;
this._onCreateAnswerFailure = reject;
this._impl.createAnswer();
});
if (haveAssertion) {
await haveAssertion;
sdp = this._localIdp.addIdentityAttribute(sdp);
}
return Cu.cloneInto({ type: "answer", sdp }, this._win);
}
async _getPermission() {
if (!this._havePermission) {
const privileged =
this._documentPrincipal.isSystemPrincipal ||
Services.prefs.getBoolPref("media.navigator.permission.disabled");
if (privileged) {
this._havePermission = Promise.resolve();
} else {
this._havePermission = new Promise((resolve, reject) => {
this._settlePermission = { allow: resolve, deny: reject };
let outerId = this._win.docShell.outerWindowID;
let chrome = new CreateOfferRequest(
outerId,
this._winID,
this._globalPCListId,
false
);
let request = this._win.CreateOfferRequest._create(this._win, chrome);
Services.obs.notifyObservers(request, "PeerConnection:request");
});
}
}
return this._havePermission;
}
_sanityCheckSdp(sdp) {
// The fippo butter finger filter AKA non-ASCII chars
// Note: SDP allows non-ASCII character in the subject (who cares?)
// eslint-disable-next-line no-control-regex
let pos = sdp.search(/[^\u0000-\u007f]/);
if (pos != -1) {
throw new this._win.DOMException(
"SDP contains non ASCII characters at position " + pos,
"InvalidParameterError"
);
}
}
setLocalDescription(desc, onSucc, onErr) {
return this._auto(onSucc, onErr, () => this._setLocalDescription(desc));
}
_setLocalDescription({ type, sdp }) {
if (type == "pranswer") {
throw new this._win.DOMException(
"pranswer not yet implemented",
"NotSupportedError"
);
}
this._checkClosed();
return this._chain(async () => {
// Avoid Promise.all ahead of synchronous part of spec algorithm, since it
// defers. NOTE: The spec says to return an already-rejected promise in
// some cases, which is difficult to achieve in practice from JS (would
// require avoiding await and then() entirely), but we want to come as
// close as we reasonably can.
const p = this._getPermission();
if (!type) {
switch (this.signalingState) {
case "stable":
case "have-local-offer":
case "have-remote-pranswer":
type = "offer";
break;
default:
type = "answer";
break;
}
}
if (!sdp) {
if (type == "offer") {
await this._createAnOffer();
} else if (type == "answer") {
await this._createAnAnswer();
}
} else {
this._sanityCheckSdp(sdp);
}
await new Promise((resolve, reject) => {
this._onSetDescriptionSuccess = resolve;
this._onSetDescriptionFailure = reject;
this._impl.setLocalDescription(this._actions[type], sdp);
});
await p;
this._negotiationNeeded = false;
if (type == "answer") {
if (this._localUfragsToReplace.size > 0) {
const ufrags = new Set(this._getUfragsWithPwds(sdp));
if (![...this._localUfragsToReplace].some(uf => ufrags.has(uf))) {
this._localUfragsToReplace.clear();
}
}
}
this.updateNegotiationNeeded();
});
}
async _validateIdentity(sdp, origin) {
// Only run a single identity verification at a time. We have to do this to
// avoid problems with the fact that identity validation doesn't block the
// resolution of setRemoteDescription().
const validate = async () => {
await this._lastIdentityValidation;
const msg = await this._remoteIdp.verifyIdentityFromSDP(sdp, origin);
// If this pc has an identity already, then the identity in sdp must match
if (
this._impl.peerIdentity &&
(!msg || msg.identity !== this._impl.peerIdentity)
) {
throw new this._win.DOMException(
"Peer Identity mismatch, expected: " + this._impl.peerIdentity,
"OperationError"
);
}
if (msg) {
// Set new identity and generate an event.
this._impl.peerIdentity = msg.identity;
this._resolvePeerIdentity(
Cu.cloneInto(
{
idp: this._remoteIdp.provider,
name: msg.identity,
},
this._win
)
);
}
};
const haveValidation = validate();
// Always eat errors on this chain
this._lastIdentityValidation = haveValidation.catch(() => {});
// If validation fails, we have some work to do. Fork it so it cannot
// interfere with the validation chain itself, even if the catch function
// throws.
haveValidation.catch(e => {
this._rejectPeerIdentity(e);
// If we don't expect a specific peer identity, failure to get a valid
// peer identity is not a terminal state, so replace the promise to
// allow another attempt.
if (!this._impl.peerIdentity) {
this._resetPeerIdentityPromise();
}
});
// Only wait for IdP validation if we need identity matching
if (this._impl.peerIdentity) {
await haveValidation;
}
}
setRemoteDescription(desc, onSucc, onErr) {
return this._auto(onSucc, onErr, () => this._setRemoteDescription(desc));
}
_setRemoteDescription({ type, sdp }) {
if (!type) {
throw new this._win.TypeError(
"Missing required 'type' member of RTCSessionDescriptionInit"
);
}
if (type == "pranswer") {
throw new this._win.DOMException(
"pranswer not yet implemented",
"NotSupportedError"
);
}
this._checkClosed();
return this._chain(async () => {
const haveSetRemote = (async () => {
if (type == "offer" && this.signalingState == "have-local-offer") {
await new Promise((resolve, reject) => {
this._onSetDescriptionSuccess = resolve;
this._onSetDescriptionFailure = reject;
this._impl.setLocalDescription(
Ci.IPeerConnection.kActionRollback,
""
);
});
this._transceivers = this._transceivers.filter(t => !t.shouldRemove);
this._updateCanTrickle();
}
this._sanityCheckSdp(sdp);
const p = this._getPermission();
await new Promise((resolve, reject) => {
this._onSetDescriptionSuccess = resolve;
this._onSetDescriptionFailure = reject;
this._impl.setRemoteDescription(this._actions[type], sdp);
});
await p;
this._transceivers = this._transceivers.filter(t => !t.shouldRemove);
this._updateCanTrickle();
})();
if (type != "rollback") {
// Do setRemoteDescription and identity validation in parallel
await this._validateIdentity(sdp);
}
await haveSetRemote;
this._negotiationNeeded = false;
if (type == "answer") {
if (this._localUfragsToReplace.size > 0) {
const ufrags = new Set(
this._getUfragsWithPwds(this._impl.currentLocalDescription)
);
if (![...this._localUfragsToReplace].some(uf => ufrags.has(uf))) {
this._localUfragsToReplace.clear();
}
}
}
this.updateNegotiationNeeded();
});
}
setIdentityProvider(provider, { protocol, usernameHint, peerIdentity } = {}) {
this._checkClosed();
peerIdentity = peerIdentity || this._impl.peerIdentity;
this._localIdp.setIdentityProvider(
provider,
protocol,
usernameHint,
peerIdentity
);
}
async _getIdentityAssertion() {
await this._certificateReady;
return this._localIdp.getIdentityAssertion(
this._impl.fingerprint,
this._documentPrincipal.origin
);
}
getIdentityAssertion() {
this._checkClosed();
return this._win.Promise.resolve(
this._chain(() => this._getIdentityAssertion())
);
}
get canTrickleIceCandidates() {
return this._canTrickle;
}
_updateCanTrickle() {
let containsTrickle = section => {
let lines = section.toLowerCase().split(/(?:\r\n?|\n)/);
return lines.some(line => {
let prefix = "a=ice-options:";
if (line.substring(0, prefix.length) !== prefix) {
return false;
}
let tokens = line.substring(prefix.length).split(" ");
return tokens.some(x => x === "trickle");
});
};
let desc = null;
try {
// The getter for remoteDescription can throw if the pc is closed.
desc = this.remoteDescription;
} catch (e) {}
if (!desc) {
this._canTrickle = null;
return;
}
let sections = desc.sdp.split(/(?:\r\n?|\n)m=/);
let topSection = sections.shift();
this._canTrickle =
containsTrickle(topSection) || sections.every(containsTrickle);
}
addIceCandidate(cand, onSucc, onErr) {
if (
cand.candidate != "" &&
cand.sdpMid == null &&
cand.sdpMLineIndex == null
) {
throw new this._win.TypeError(
"Cannot add a candidate without specifying either sdpMid or sdpMLineIndex"
);
}
return this._auto(onSucc, onErr, () => this._addIceCandidate(cand));
}
async _addIceCandidate({
candidate,
sdpMid,
sdpMLineIndex,
usernameFragment,
}) {
this._checkClosed();
return this._chain(async () => {
if (
!this._impl.pendingRemoteDescription.length &&
!this._impl.currentRemoteDescription.length
) {
throw new this._win.DOMException(
"No remoteDescription.",
"InvalidStateError"
);
}
return new Promise((resolve, reject) => {
this._onAddIceCandidateSuccess = resolve;
this._onAddIceCandidateError = reject;
this._impl.addIceCandidate(
candidate,
sdpMid || "",
usernameFragment || "",
sdpMLineIndex
);
});
});
}
restartIce() {
this._localUfragsToReplace = new Set([
...this._getUfragsWithPwds(this._impl.currentLocalDescription),
...this._getUfragsWithPwds(this._impl.pendingLocalDescription),
]);
this.updateNegotiationNeeded();
}
_getUfragsWithPwds(sdp) {
return (
sdp
.split("\r\nm=")
.map(block => block.split("\r\n"))
.map(lines => [
lines.find(l => l.startsWith("a=ice-ufrag:")),
lines.find(l => l.startsWith("a=ice-pwd:")),
])
// Even though our own SDP doesn't currently do this: JSEP says properties
// found in the session (array[0]) apply to all m-lines that don't specify
// them, like default values.
.map(([a, b], i, array) => [a || array[0][0], b || array[0][1]])
.filter(([a, b]) => a && b)
.map(array => array.join())
);
}
addStream(stream) {
stream.getTracks().forEach(track => this.addTrack(track, stream));
}
addTrack(track, ...streams) {
this._checkClosed();
if (
this._transceivers.some(transceiver => transceiver.sender.track == track)
) {
throw new this._win.DOMException(
"This track is already set on a sender.",
"InvalidAccessError"
);
}
let transceiver = this._transceivers.find(transceiver => {
return (
transceiver.sender.track == null &&
transceiver.getKind() == track.kind &&
!transceiver.stopped &&
!transceiver.hasBeenUsedToSend()
);
});
if (transceiver) {
transceiver.sender.setTrack(track);
transceiver.sender.setStreams(streams);
if (transceiver.direction == "recvonly") {
transceiver.setDirectionInternal("sendrecv");
} else if (transceiver.direction == "inactive") {
transceiver.setDirectionInternal("sendonly");
}
} else {
transceiver = this._addTransceiverNoEvents(track, {
streams,
direction: "sendrecv",
});
}
transceiver.setAddTrackMagic();
transceiver.sync();
this.updateNegotiationNeeded();
return transceiver.sender;
}
removeTrack(sender) {
this._checkClosed();
sender.checkWasCreatedByPc(this.__DOM_IMPL__);
let transceiver = this._transceivers.find(
transceiver => !transceiver.stopped && transceiver.sender == sender
);
// If the transceiver was removed due to rollback, let it slide.
if (!transceiver || !sender.track) {
return;
}
sender.setTrack(null);
if (transceiver.direction == "sendrecv") {
transceiver.setDirectionInternal("recvonly");
} else if (transceiver.direction == "sendonly") {
transceiver.setDirectionInternal("inactive");
}
transceiver.sync();
this.updateNegotiationNeeded();
}
_addTransceiverNoEvents(sendTrackOrKind, init) {
let sendTrack = null;
let kind;
if (typeof sendTrackOrKind == "string") {
kind = sendTrackOrKind;
switch (kind) {
case "audio":
case "video":
break;
default:
throw new this._win.TypeError("Invalid media kind");
}
} else {
sendTrack = sendTrackOrKind;
kind = sendTrack.kind;
}
let transceiverImpl = this._impl.createTransceiverImpl(kind, sendTrack);
let transceiver = this._win.RTCRtpTransceiver._create(
this._win,
new RTCRtpTransceiver(this, transceiverImpl, init, kind, sendTrack)
);
transceiver.sync();
this._transceivers.push(transceiver);
return transceiver;
}
_onTransceiverNeeded(kind, transceiverImpl) {
let init = { direction: "recvonly" };
let transceiver = this._win.RTCRtpTransceiver._create(
this._win,
new RTCRtpTransceiver(this, transceiverImpl, init, kind, null)
);
transceiver.sync();
this._transceivers.push(transceiver);
}
addTransceiver(sendTrackOrKind, init) {
this._checkClosed();
let transceiver = this._addTransceiverNoEvents(sendTrackOrKind, init);
this.updateNegotiationNeeded();
return transceiver;
}
_syncTransceivers() {
this._transceivers.forEach(transceiver => transceiver.sync());
}
updateNegotiationNeeded() {
if (this._operations.length) {
this._updateNegotiationNeededOnEmptyChain = true;
return;
}
this._queueTaskWithClosedCheck(() => {
if (this._operations.length) {
this._updateNegotiationNeededOnEmptyChain = true;
return;
}
if (this.signalingState != "stable") {
return;
}
const negotiationNeeded =
this._impl.checkNegotiationNeeded() ||
this._localUfragsToReplace.size > 0;
if (!negotiationNeeded) {
this._negotiationNeeded = false;
return;
}
if (this._negotiationNeeded) {
return;
}
this._negotiationNeeded = true;
this.dispatchEvent(new this._win.Event("negotiationneeded"));
});
}
_replaceTrackNoRenegotiation(transceiverImpl, withTrack) {
this._impl.replaceTrackNoRenegotiation(transceiverImpl, withTrack);
}
close() {
if (this._closed) {
return;
}
this._closed = true;
this.changeIceConnectionState("closed");
if (this._localIdp) {
this._localIdp.close();
}
if (this._remoteIdp) {
this._remoteIdp.close();
}
if (!this._suppressEvents) {
this._transceivers.forEach(t => t.setStopped());
}
this._impl.close();
this._suppressEvents = true;
delete this._pc;
}
getLocalStreams() {
this._checkClosed();
let localStreams = new Set();
this._transceivers.forEach(transceiver => {
transceiver.sender.getStreams().forEach(stream => {
localStreams.add(stream);
});
});
return [...localStreams.values()];
}
getRemoteStreams() {
this._checkClosed();
return this._impl.getRemoteStreams();
}
getSenders() {
return this.getTransceivers()
.filter(transceiver => !transceiver.stopped)
.map(transceiver => transceiver.sender);
}
getReceivers() {
return this.getTransceivers()
.filter(transceiver => !transceiver.stopped)
.map(transceiver => transceiver.receiver);
}
mozSetPacketCallback(callback) {
this._onPacket = callback;
}
mozEnablePacketDump(level, type, sending) {
this._impl.enablePacketDump(level, type, sending);
}
mozDisablePacketDump(level, type, sending) {
this._impl.disablePacketDump(level, type, sending);
}
getTransceivers() {
return this._transceivers;
}
get localDescription() {
return this.pendingLocalDescription || this.currentLocalDescription;
}
get currentLocalDescription() {
this._checkClosed();
const sdp = this._impl.currentLocalDescription;
if (sdp.length == 0) {
return null;
}
const type = this._impl.currentOfferer ? "offer" : "answer";
return new this._win.RTCSessionDescription({ type, sdp });
}
get pendingLocalDescription() {
this._checkClosed();
const sdp = this._impl.pendingLocalDescription;
if (sdp.length == 0) {
return null;
}
const type = this._impl.pendingOfferer ? "offer" : "answer";
return new this._win.RTCSessionDescription({ type, sdp });
}
get remoteDescription() {
return this.pendingRemoteDescription || this.currentRemoteDescription;
}
get currentRemoteDescription() {
this._checkClosed();
const sdp = this._impl.currentRemoteDescription;
if (sdp.length == 0) {
return null;
}
const type = this._impl.currentOfferer ? "answer" : "offer";
return new this._win.RTCSessionDescription({ type, sdp });
}
get pendingRemoteDescription() {
this._checkClosed();
const sdp = this._impl.pendingRemoteDescription;
if (sdp.length == 0) {
return null;
}
const type = this._impl.pendingOfferer ? "answer" : "offer";
return new this._win.RTCSessionDescription({ type, sdp });
}
get peerIdentity() {
return this._peerIdentity;
}
get idpLoginUrl() {
return this._localIdp.idpLoginUrl;
}
get id() {
return this._impl.id;
}
set id(s) {
this._impl.id = s;
}
get iceGatheringState() {
return this._pc.iceGatheringState;
}
get iceConnectionState() {
return this._iceConnectionState;
}
get signalingState() {
// checking for our local pc closed indication
// before invoking the pc methods.
if (this._closed) {
return "closed";
}
return this._impl.signalingState;
}
handleIceGatheringStateChange() {
_globalPCList.notifyLifecycleObservers(this, "icegatheringstatechange");
this.dispatchEvent(new this._win.Event("icegatheringstatechange"));
if (this.iceGatheringState === "complete") {
this.dispatchEvent(
new this._win.RTCPeerConnectionIceEvent("icecandidate", {
candidate: null,
})
);
}
}
changeIceConnectionState(state) {
if (state != this._iceConnectionState) {
this._iceConnectionState = state;
_globalPCList.notifyLifecycleObservers(this, "iceconnectionstatechange");
if (!this._closed) {
this.dispatchEvent(new this._win.Event("iceconnectionstatechange"));
}
}
}
getStats(selector, onSucc, onErr) {
if (selector !== null) {
let matchingSenders = this.getSenders().filter(s => s.track === selector);
let matchingReceivers = this.getReceivers().filter(
r => r.track === selector
);
if (matchingSenders.length + matchingReceivers.length != 1) {
throw new this._win.DOMException(
"track must be associated with a unique sender or receiver, but " +
" is associated with " +
matchingSenders.length +
" senders and " +
matchingReceivers.length +
" receivers.",
"InvalidAccessError"
);
}
}
return this._auto(onSucc, onErr, () => this._impl.getStats(selector));
}
createDataChannel(
label,
{
maxRetransmits,
ordered,
negotiated,
id = null,
maxRetransmitTime,
maxPacketLifeTime,
protocol,
} = {}
) {
this._checkClosed();
this._pcTelemetry.recordDataChannelInit(
maxRetransmitTime,
maxPacketLifeTime
);
if (maxPacketLifeTime === undefined) {
maxPacketLifeTime = maxRetransmitTime;
}
if (maxRetransmitTime !== undefined) {
this.logWarning(
"Use maxPacketLifeTime instead of deprecated maxRetransmitTime which will stop working soon in createDataChannel!"
);
}
if (protocol.length > 32767) {
// At least 65536/2 UTF-16 characters. UTF-8 might be too long.
// Spec says to check how long |protocol| and |label| are in _bytes_. This
// is a little ambiguous. For now, examine the length of the utf-8 encoding.
const byteCounter = new TextEncoder("utf-8");
if (byteCounter.encode(protocol).length > 65535) {
throw new this._win.TypeError(
"protocol cannot be longer than 65535 bytes"
);
}
}
if (label.length > 32767) {
const byteCounter = new TextEncoder("utf-8");
if (byteCounter.encode(label).length > 65535) {
throw new this._win.TypeError(
"label cannot be longer than 65535 bytes"
);
}
}
if (!negotiated) {
id = null;
} else if (id === null) {
throw new this._win.TypeError("id is required when negotiated is true");
}
if (maxPacketLifeTime !== undefined && maxRetransmits !== undefined) {
throw new this._win.TypeError(
"Both maxPacketLifeTime and maxRetransmits cannot be provided"
);
}
if (id == 65535) {
throw new this._win.TypeError("id cannot be 65535");
}
// Must determine the type where we still know if entries are undefined.
let type;
if (maxPacketLifeTime !== undefined) {
type = Ci.IPeerConnection.kDataChannelPartialReliableTimed;
} else if (maxRetransmits !== undefined) {
type = Ci.IPeerConnection.kDataChannelPartialReliableRexmit;
} else {
type = Ci.IPeerConnection.kDataChannelReliable;
}
// Synchronous since it doesn't block.
let dataChannel;
try {
dataChannel = this._impl.createDataChannel(
label,
protocol,
type,
ordered,
maxPacketLifeTime,
maxRetransmits,
negotiated,
id
);
} catch (e) {
if (e.result != Cr.NS_ERROR_NOT_AVAILABLE) {
throw e;
}
const msg =
id === null ? "No available id could be generated" : "Id is in use";
throw new this._win.DOMException(msg, "OperationError");
}
// Spec says to only do this if this is the first DataChannel created,
// but the c++ code that does the "is negotiation needed" checking will
// only ever return true on the first one.
this.updateNegotiationNeeded();
return dataChannel;
}
}
setupPrototype(RTCPeerConnection, {
classID: PC_CID,
contractID: PC_CONTRACT,
QueryInterface: ChromeUtils.generateQI(["nsIDOMGlobalPropertyInitializer"]),
_actions: {
offer: Ci.IPeerConnection.kActionOffer,
answer: Ci.IPeerConnection.kActionAnswer,
pranswer: Ci.IPeerConnection.kActionPRAnswer,
rollback: Ci.IPeerConnection.kActionRollback,
},
});
// This is a separate class because we don't want to expose it to DOM.
class PeerConnectionObserver {
init(win) {
this._win = win;
}
__init(dompc) {
this._dompc = dompc._innerObject;
}
newError({ message, name }) {
return new this._dompc._win.DOMException(message, name);
}
dispatchEvent(event) {
this._dompc.dispatchEvent(event);
}
onCreateOfferSuccess(sdp) {
this._dompc._onCreateOfferSuccess(sdp);
}
onCreateOfferError(error) {
this._dompc._onCreateOfferFailure(this.newError(error));
}
onCreateAnswerSuccess(sdp) {
this._dompc._onCreateAnswerSuccess(sdp);
}
onCreateAnswerError(error) {
this._dompc._onCreateAnswerFailure(this.newError(error));
}
onSetDescriptionSuccess() {
this._dompc._onSetDescriptionSuccess();
}
onSetDescriptionError(error) {
this._dompc._onSetDescriptionFailure(this.newError(error));
}
onAddIceCandidateSuccess() {
this._dompc._onAddIceCandidateSuccess();
}
onAddIceCandidateError(error) {
this._dompc._onAddIceCandidateError(this.newError(error));
}
onIceCandidate(sdpMLineIndex, sdpMid, candidate, usernameFragment) {
let win = this._dompc._win;
if (candidate || sdpMid || usernameFragment) {
if (candidate.includes(" typ relay ")) {
this._dompc._iceGatheredRelayCandidates = true;
}
candidate = new win.RTCIceCandidate({
candidate,
sdpMid,
sdpMLineIndex,
usernameFragment,
});
}
this.dispatchEvent(
new win.RTCPeerConnectionIceEvent("icecandidate", { candidate })
);
}
// This method is primarily responsible for updating iceConnectionState.
// This state is defined in the WebRTC specification as follows:
//
// iceConnectionState:
// -------------------
// new Any of the RTCIceTransports are in the new state and none
// of them are in the checking, failed or disconnected state.
//
// checking Any of the RTCIceTransports are in the checking state and
// none of them are in the failed or disconnected state.
//
// connected All RTCIceTransports are in the connected, completed or
// closed state and at least one of them is in the connected
// state.
//
// completed All RTCIceTransports are in the completed or closed state
// and at least one of them is in the completed state.
//
// failed Any of the RTCIceTransports are in the failed state.
//
// disconnected Any of the RTCIceTransports are in the disconnected state
// and none of them are in the failed state.
//
// closed All of the RTCIceTransports are in the closed state.
handleIceConnectionStateChange(iceConnectionState) {
let pc = this._dompc;
if (pc.iceConnectionState === iceConnectionState) {
return;
}
if (iceConnectionState === "failed") {
if (!pc._hasStunServer) {
pc.logError(
"ICE failed, add a STUN server and see about:webrtc for more details"
);
} else if (!pc._hasTurnServer) {
pc.logError(
"ICE failed, add a TURN server and see about:webrtc for more details"
);
} else if (pc._hasTurnServer && !pc._iceGatheredRelayCandidates) {
pc.logError(
"ICE failed, your TURN server appears to be broken, see about:webrtc for more details"
);
} else {
pc.logError("ICE failed, see about:webrtc for more details");
}
}
pc.changeIceConnectionState(iceConnectionState);
}
onStateChange(state) {
if (!this._dompc) {
return;
}
if (state == "SignalingState") {
this.dispatchEvent(new this._win.Event("signalingstatechange"));
return;
}
if (!this._dompc._pc) {
return;
}
switch (state) {
case "IceConnectionState":
let connState = this._dompc._pc.iceConnectionState;
this._dompc._queueTaskWithClosedCheck(() => {
this.handleIceConnectionStateChange(connState);
});
break;
case "IceGatheringState":
this._dompc.handleIceGatheringStateChange();
break;
default:
this._dompc.logWarning("Unhandled state type: " + state);
break;
}
}
onTransceiverNeeded(kind, transceiverImpl) {
this._dompc._onTransceiverNeeded(kind, transceiverImpl);
}
notifyDataChannel(channel) {
this.dispatchEvent(
new this._dompc._win.RTCDataChannelEvent("datachannel", { channel })
);
}
fireTrackEvent(receiver, streams) {
const pc = this._dompc;
const transceiver = pc.getTransceivers().find(t => t.receiver == receiver);
if (!transceiver) {
return;
}
const track = receiver.track;
this.dispatchEvent(
new this._win.RTCTrackEvent("track", {
transceiver,
receiver,
track,
streams,
})
);
// Fire legacy event as well for a little bit.
this.dispatchEvent(
new this._win.MediaStreamTrackEvent("addtrack", { track })
);
}
fireStreamEvent(stream) {
const ev = new this._win.MediaStreamEvent("addstream", { stream });
this.dispatchEvent(ev);
}
onPacket(level, type, sending, packet) {
var pc = this._dompc;
if (pc._onPacket) {
pc._onPacket(level, type, sending, packet);
}
}
syncTransceivers() {
this._dompc._syncTransceivers();
}
}
setupPrototype(PeerConnectionObserver, {
classID: PC_OBS_CID,
contractID: PC_OBS_CONTRACT,
QueryInterface: ChromeUtils.generateQI([