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gecko/dom/media/PeerConnection.js

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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 {classes: Cc, interfaces: Ci, utils: Cu, results: Cr} = Components;
Cu.import("resource://gre/modules/Services.jsm");
Cu.import("resource://gre/modules/XPCOMUtils.jsm");
XPCOMUtils.defineLazyModuleGetter(this, "PeerConnectionIdp",
"resource://gre/modules/media/PeerConnectionIdp.jsm");
XPCOMUtils.defineLazyModuleGetter(this, "convertToRTCStatsReport",
"resource://gre/modules/media/RTCStatsReport.jsm");
XPCOMUtils.defineLazyModuleGetter(this, "AppConstants",
"resource://gre/modules/AppConstants.jsm");
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_MANAGER_CONTRACT = "@mozilla.org/dom/peerconnectionmanager;1";
const PC_STATS_CONTRACT = "@mozilla.org/dom/rtcstatsreport;1";
const PC_STATIC_CONTRACT = "@mozilla.org/dom/peerconnectionstatic;1";
const PC_SENDER_CONTRACT = "@mozilla.org/dom/rtpsender;1";
const PC_RECEIVER_CONTRACT = "@mozilla.org/dom/rtpreceiver;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_STATS_CID = Components.ID("{7fe6e18b-0da3-4056-bf3b-440ef3809e06}");
const PC_STATIC_CID = Components.ID("{0fb47c47-a205-4583-a9fc-cbadf8c95880}");
const PC_SENDER_CID = Components.ID("{4fff5d46-d827-4cd4-a970-8fd53977440e}");
const PC_RECEIVER_CID = Components.ID("{d974b814-8fde-411c-8c45-b86791b81030}");
const PC_COREQUEST_CID = Components.ID("{74b2122d-65a8-4824-aa9e-3d664cb75dc2}");
// 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).
function GlobalPCList() {
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 (Cc["@mozilla.org/childprocessmessagemanager;1"]) {
let mm = Cc["@mozilla.org/childprocessmessagemanager;1"].getService(Ci.nsIMessageListenerManager);
mm.addMessageListener("gmp-plugin-crash", this);
}
}
GlobalPCList.prototype = {
QueryInterface: XPCOMUtils.generateQI([Ci.nsIObserver,
Ci.nsIMessageListener,
Ci.nsISupportsWeakReference,
Ci.IPeerConnectionManager]),
classID: PC_MANAGER_CID,
_xpcom_factory: {
createInstance: function(outer, iid) {
if (outer) {
throw Cr.NS_ERROR_NO_AGGREGATION;
}
return _globalPCList.QueryInterface(iid);
}
},
notifyLifecycleObservers: function(pc, type) {
for (var key of Object.keys(this._lifecycleobservers)) {
this._lifecycleobservers[key](pc, pc._winID, type);
}
},
addPC: function(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: function(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;
}
}
}
}
},
removeNullRefs: function(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];
}
},
hasActivePeerConnection: function(winID) {
this.removeNullRefs(winID);
return this._list[winID] ? true : false;
},
handleGMPCrash: function(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: function(message) {
if (message.name == "gmp-plugin-crash") {
this.handleGMPCrash(message.data);
}
},
observe: function(subject, topic, data) {
let cleanupPcRef = function(pcref) {
let pc = pcref.get();
if (pc) {
pc._pc.close();
delete pc._observer;
pc._pc = null;
}
};
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") {
// Delete all peerconnections on shutdown - mostly synchronously (we
// need them to be done deleting transports and streams before we
// return)! All socket operations must be queued to STS thread
// before we return to here.
// Also kill them if "Work Offline" is selected - more can be created
// while offline, but attempts to connect them should fail.
for (let winId in this._list) {
cleanupWinId(this._list, winId);
}
this._networkdown = true;
}
else if (topic == "network:offline-status-changed") {
if (data == "offline") {
// this._list shold be empty here
this._networkdown = true;
} else if (data == "online") {
this._networkdown = false;
}
} else if (topic == "network:app-offline-status-changed") {
// App changed offline status. The subject contains the appId for which
// we need to check the status
let appId = subject.QueryInterface(Ci.nsIAppOfflineInfo).appId;
let ios = Cc['@mozilla.org/network/io-service;1'].getService(Ci.nsIIOService);
for (let winId in this._list) {
if (appId != this._list[winId]._appId) {
continue;
}
if (ios.isAppOffline(appId)) {
cleanupWinId(this._list, winId);
}
}
} 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 operation is insecure.",
"SecurityError");
pc._settlePermission.deny(err);
}
}
}
},
_registerPeerConnectionLifecycleCallback: function(winID, cb) {
this._lifecycleobservers[winID] = cb;
},
};
var _globalPCList = new GlobalPCList();
function RTCIceCandidate() {
this.candidate = this.sdpMid = this.sdpMLineIndex = null;
}
RTCIceCandidate.prototype = {
classDescription: "RTCIceCandidate",
classID: PC_ICE_CID,
contractID: PC_ICE_CONTRACT,
QueryInterface: XPCOMUtils.generateQI([Ci.nsISupports,
Ci.nsIDOMGlobalPropertyInitializer]),
init: function(win) { this._win = win; },
__init: function(dict) {
this.candidate = dict.candidate;
this.sdpMid = dict.sdpMid;
this.sdpMLineIndex = ("sdpMLineIndex" in dict)? dict.sdpMLineIndex : null;
}
};
function RTCSessionDescription() {
this.type = this.sdp = null;
}
RTCSessionDescription.prototype = {
classDescription: "RTCSessionDescription",
classID: PC_SESSION_CID,
contractID: PC_SESSION_CONTRACT,
QueryInterface: XPCOMUtils.generateQI([Ci.nsISupports,
Ci.nsIDOMGlobalPropertyInitializer]),
init: function(win) { this._win = win; },
__init: function(dict) {
this.type = dict.type;
this.sdp = dict.sdp;
}
};
function RTCStatsReport(win, dict) {
this._win = win;
this._pcid = dict.pcid;
this._report = convertToRTCStatsReport(dict);
}
RTCStatsReport.prototype = {
classDescription: "RTCStatsReport",
classID: PC_STATS_CID,
contractID: PC_STATS_CONTRACT,
QueryInterface: XPCOMUtils.generateQI([Ci.nsISupports]),
// TODO: Change to use webidl getters once available (Bug 952122)
//
// Since webidl getters are not available, we make the stats available as
// enumerable read-only properties directly on our content-facing object.
// Must be called after our webidl sandwich is made.
makeStatsPublic: function() {
let props = {};
this.forEach(function(stat) {
props[stat.id] = { enumerable: true, configurable: false,
writable: false, value: stat };
});
Object.defineProperties(this.__DOM_IMPL__.wrappedJSObject, props);
},
forEach: function(cb, thisArg) {
for (var key in this._report) {
cb.call(thisArg || this._report, this.get(key), key, this._report);
}
},
get: function(key) {
function publifyReadonly(win, obj) {
let props = {};
for (let k in obj) {
props[k] = {enumerable:true, configurable:false, writable:false, value:obj[k]};
}
let pubobj = Cu.createObjectIn(win);
Object.defineProperties(pubobj, props);
return pubobj;
}
// Return a content object rather than a wrapped chrome one.
return publifyReadonly(this._win, this._report[key]);
},
has: function(key) {
return this._report[key] !== undefined;
},
get mozPcid() { return this._pcid; }
};
function RTCPeerConnection() {
this._senders = [];
this._receivers = [];
this._pc = null;
this._observer = null;
this._closed = false;
this._onCreateOfferSuccess = null;
this._onCreateOfferFailure = null;
this._onCreateAnswerSuccess = null;
this._onCreateAnswerFailure = null;
this._onGetStatsSuccess = null;
this._onGetStatsFailure = null;
this._onReplaceTrackSender = null;
this._onReplaceTrackWithTrack = null;
this._onReplaceTrackSuccess = null;
this._onReplaceTrackFailure = null;
this._localType = null;
this._remoteType = null;
// States
this._iceGatheringState = this._iceConnectionState = "new";
}
RTCPeerConnection.prototype = {
classDescription: "RTCPeerConnection",
classID: PC_CID,
contractID: PC_CONTRACT,
QueryInterface: XPCOMUtils.generateQI([Ci.nsISupports,
Ci.nsIDOMGlobalPropertyInitializer]),
init: function(win) { this._win = win; },
__init: function(rtcConfig) {
this._winID = this._win.QueryInterface(Ci.nsIInterfaceRequestor)
.getInterface(Ci.nsIDOMWindowUtils).currentInnerWindowID;
// 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 (!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",
null, 0);
rtcConfig.iceServers = [];
}
try {
this._mustValidateRTCConfiguration(rtcConfig,
"Ignoring invalid media.peerconnection.default_iceservers in about:config");
} catch (e) {
this.logWarning(e.message, null, 0);
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");
}
// Save the appId
var principal = Cu.getWebIDLCallerPrincipal();
this._appId = principal.appId;
this._isChrome = Services.scriptSecurityManager.isSystemPrincipal(principal);
// Get the offline status for this appId
let appOffline = false;
if (this._appId != Ci.nsIScriptSecurityManager.NO_APP_ID &&
this._appId != Ci.nsIScriptSecurityManager.UNKNOWN_APP_ID) {
let ios = Cc['@mozilla.org/network/io-service;1'].getService(Ci.nsIIOService);
appOffline = ios.isAppOffline(this._appId);
}
if (_globalPCList._networkdown || appOffline) {
throw new this._win.DOMException(
"Can't create RTCPeerConnections when the network is down",
"InvalidStateError");
}
this.makeGetterSetterEH("onaddstream");
this.makeGetterSetterEH("onaddtrack");
this.makeGetterSetterEH("onicecandidate");
this.makeGetterSetterEH("onnegotiationneeded");
this.makeGetterSetterEH("onsignalingstatechange");
this.makeGetterSetterEH("onremovestream");
this.makeGetterSetterEH("ondatachannel");
this.makeGetterSetterEH("oniceconnectionstatechange");
this.makeGetterSetterEH("onidentityresult");
this.makeGetterSetterEH("onpeeridentity");
this.makeGetterSetterEH("onidpassertionerror");
this.makeGetterSetterEH("onidpvalidationerror");
this._pc = new this._win.PeerConnectionImpl();
this._operationsChain = this._win.Promise.resolve();
this.__DOM_IMPL__._innerObject = this;
this._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(this._observer, this._win, rtcConfig,
Services.tm.currentThread);
this._initCertificate(rtcConfig.certificates);
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;
},
_initCertificate: function(certificates) {
let certPromise;
if (certificates && certificates.length > 0) {
if (certificates.length > 1) {
throw new this._win.DOMException(
"RTCPeerConnection does not currently support multiple certificates",
"NotSupportedError");
}
let cert = certificates.find(c => c.expires > Date.now());
if (!cert) {
throw new this._win.DOMException(
"Unable to create RTCPeerConnection with an expired certificate",
"InvalidParameterError");
}
certPromise = Promise.resolve(cert);
} else {
certPromise = this._win.RTCPeerConnection.generateCertificate({
name: "ECDSA", namedCurve: "P-256"
});
}
this._certificateReady = certPromise
.then(cert => this._impl.certificate = cert);
},
_initIdp: function() {
this._peerIdentity = new this._win.Promise((resolve, reject) => {
this._resolvePeerIdentity = resolve;
this._rejectPeerIdentity = reject;
});
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: function(func) {
this._checkClosed(); // out here DOMException line-numbers work.
let p = this._operationsChain.then(() => {
// Don't _checkClosed() inside the chain, because it throws, and spec
// behavior as of this writing is to NOT reject outstanding promises on
// close. This is what happens most of the time anyways, as the c++ code
// stops calling us once closed, hanging the chain. However, c++ may
// already have queued tasks on us, so if we're one of those then sit back.
if (!this._closed) {
return func();
}
});
// don't propagate errors in the operations chain (this is a fork of p).
this._operationsChain = p.catch(() => {});
return p;
},
// This wrapper helps implement 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.
_legacyCatch: function(onSuccess, onError, func) {
if (!onSuccess) {
return func();
}
try {
return func().then(this._wrapLegacyCallback(onSuccess),
this._wrapLegacyCallback(onError));
} catch (e) {
this._wrapLegacyCallback(onError)(e);
return this._win.Promise.resolve(); // avoid webidl TypeError
}
},
_wrapLegacyCallback: function(func) {
return result => {
try {
func && func(result);
} catch (e) {
this.logErrorAndCallOnError(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: function(rtcConfig, msg) {
// Normalize iceServers input
rtcConfig.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.", null, 0);
}
});
let ios = Cc['@mozilla.org/network/io-service;1'].getService(Ci.nsIIOService);
let nicerNewURI = uriStr => {
try {
return ios.newURI(uriStr, null, null);
} catch (e if (e.result == Cr.NS_ERROR_MALFORMED_URI)) {
throw new this._win.DOMException(msg + " - malformed URI: " + uriStr,
"SyntaxError");
}
};
rtcConfig.iceServers.forEach(server => {
if (!server.urls) {
throw new this._win.DOMException(msg + " - missing urls", "InvalidAccessError");
}
server.urls.forEach(urlStr => {
let url = nicerNewURI(urlStr);
if (url.scheme in { turn:1, turns:1 }) {
if (!server.username) {
throw new this._win.DOMException(msg + " - missing username: " + urlStr,
"InvalidAccessError");
}
if (!server.credential) {
throw new this._win.DOMException(msg + " - missing credential: " + urlStr,
"InvalidAccessError");
}
}
else if (!(url.scheme in { stun:1, stuns:1 })) {
throw new this._win.DOMException(msg + " - improper scheme: " + url.scheme,
"SyntaxError");
}
if (url.scheme in { stuns:1, turns:1 }) {
this.logWarning(url.scheme.toUpperCase() + " is not yet supported.", null, 0);
}
});
});
},
// 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: function() {
if (this._closed) {
throw new this._win.DOMException("Peer connection is closed",
"InvalidStateError");
}
},
dispatchEvent: function(event) {
// PC can close while events are firing if there is an async dispatch
// in c++ land
if (!this._closed) {
this.__DOM_IMPL__.dispatchEvent(event);
}
},
// Log error message to web console and window.onerror, if present.
logErrorAndCallOnError: function(e) {
this.logMsg(e.message, e.fileName, e.lineNumber, Ci.nsIScriptError.exceptionFlag);
// 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.logError(e.message, e.fileName, e.lineNumber);
} catch(e) {}
}
},
logError: function(msg, file, line) {
this.logMsg(msg, file, line, Ci.nsIScriptError.errorFlag);
},
logWarning: function(msg, file, line) {
this.logMsg(msg, file, line, Ci.nsIScriptError.warningFlag);
},
logMsg: function(msg, file, line, flag) {
let scriptErrorClass = Cc["@mozilla.org/scripterror;1"];
let scriptError = scriptErrorClass.createInstance(Ci.nsIScriptError);
scriptError.initWithWindowID(msg, file, null, line, 0, flag,
"content javascript", this._winID);
let console = Cc["@mozilla.org/consoleservice;1"].
getService(Ci.nsIConsoleService);
console.logMessage(scriptError);
},
getEH: function(type) {
return this.__DOM_IMPL__.getEventHandler(type);
},
setEH: function(type, handler) {
this.__DOM_IMPL__.setEventHandler(type, handler);
},
makeGetterSetterEH: function(name) {
Object.defineProperty(this, name,
{
get:function() { return this.getEH(name); },
set:function(h) { return this.setEH(name, h); }
});
},
_addIdentityAssertion: function(sdpPromise, origin) {
if (!this._localIdp.enabled) {
return sdpPromise;
}
return Promise.all([
this._certificateReady
.then(() => this._localIdp.getIdentityAssertion(this._impl.fingerprint,
origin)),
sdpPromise
]).then(([,sdp]) => this._localIdp.addIdentityAttribute(sdp));
},
createOffer: function(optionsOrOnSuccess, onError, options) {
// This entry-point handles both new and legacy call sig. Decipher which one
let onSuccess;
if (typeof optionsOrOnSuccess == "function") {
onSuccess = optionsOrOnSuccess;
} else {
options = optionsOrOnSuccess;
}
return this._legacyCatch(onSuccess, onError, () => {
// TODO: Remove error on constraint-like RTCOptions next cycle (1197021).
// Note that webidl bindings make o.mandatory implicit but not o.optional.
function convertLegacyOptions(o) {
// Detect (mandatory OR optional) AND no other top-level members.
let lcy = ((o.mandatory && Object.keys(o.mandatory).length) || o.optional) &&
Object.keys(o).length == (o.mandatory? 1 : 0) + (o.optional? 1 : 0);
if (!lcy) {
return false;
}
let old = o.mandatory || {};
if (o.mandatory) {
delete o.mandatory;
}
if (o.optional) {
o.optional.forEach(one => {
// The old spec had optional as an array of objects w/1 attribute each.
// Assumes our JS-webidl bindings only populate passed-in properties.
let key = Object.keys(one)[0];
if (key && old[key] === undefined) {
old[key] = one[key];
}
});
delete o.optional;
}
o.offerToReceiveAudio = old.OfferToReceiveAudio;
o.offerToReceiveVideo = old.OfferToReceiveVideo;
o.mozDontOfferDataChannel = old.MozDontOfferDataChannel;
o.mozBundleOnly = old.MozBundleOnly;
Object.keys(o).forEach(k => {
if (o[k] === undefined) {
delete o[k];
}
});
return true;
}
if (options && convertLegacyOptions(options)) {
this.logError(
"Mandatory/optional in createOffer options no longer works! Use " +
JSON.stringify(options) + " instead (note the case difference)!",
null, 0);
options = {};
}
let origin = Cu.getWebIDLCallerPrincipal().origin;
return this._chain(() => {
let p = Promise.all([this.getPermission(), this._certificateReady])
.then(() => new this._win.Promise((resolve, reject) => {
this._onCreateOfferSuccess = resolve;
this._onCreateOfferFailure = reject;
this._impl.createOffer(options);
}));
p = this._addIdentityAssertion(p, origin);
return p.then(
sdp => new this._win.RTCSessionDescription({ type: "offer", sdp: sdp }));
});
});
},
createAnswer: function(optionsOrOnSuccess, onError) {
// This entry-point handles both new and legacy call sig. Decipher which one
let onSuccess, options;
if (typeof optionsOrOnSuccess == "function") {
onSuccess = optionsOrOnSuccess;
} else {
options = optionsOrOnSuccess;
}
return this._legacyCatch(onSuccess, onError, () => {
let origin = Cu.getWebIDLCallerPrincipal().origin;
return this._chain(() => {
let p = Promise.all([this.getPermission(), this._certificateReady])
.then(() => new this._win.Promise((resolve, reject) => {
// We give up line-numbers in errors by doing this here, but do all
// state-checks inside the chain, to support the legacy feature that
// callers don't have to wait for setRemoteDescription to finish.
if (!this.remoteDescription) {
throw new this._win.DOMException("setRemoteDescription not called",
"InvalidStateError");
}
if (this.remoteDescription.type != "offer") {
throw new this._win.DOMException("No outstanding offer",
"InvalidStateError");
}
this._onCreateAnswerSuccess = resolve;
this._onCreateAnswerFailure = reject;
this._impl.createAnswer();
}));
p = this._addIdentityAssertion(p, origin);
return p.then(sdp => {
return new this._win.RTCSessionDescription({ type: "answer", sdp: sdp });
});
});
});
},
getPermission: function() {
if (this._havePermission) {
return this._havePermission;
}
if (this._isChrome ||
AppConstants.MOZ_B2G ||
Services.prefs.getBoolPref("media.navigator.permission.disabled")) {
return this._havePermission = Promise.resolve();
}
return this._havePermission = new Promise((resolve, reject) => {
this._settlePermission = { allow: resolve, deny: reject };
let outerId = this._win.QueryInterface(Ci.nsIInterfaceRequestor).
getInterface(Ci.nsIDOMWindowUtils).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", null);
});
},
setLocalDescription: function(desc, onSuccess, onError) {
return this._legacyCatch(onSuccess, onError, () => {
this._localType = desc.type;
let type;
switch (desc.type) {
case "offer":
type = Ci.IPeerConnection.kActionOffer;
break;
case "answer":
type = Ci.IPeerConnection.kActionAnswer;
break;
case "pranswer":
throw new this._win.DOMException("pranswer not yet implemented",
"NotSupportedError");
case "rollback":
type = Ci.IPeerConnection.kActionRollback;
break;
default:
throw new this._win.DOMException(
"Invalid type " + desc.type + " provided to setLocalDescription",
"InvalidParameterError");
}
if (desc.type !== "rollback" && !desc.sdp) {
throw new this._win.DOMException(
"Empty or null SDP provided to setLocalDescription",
"InvalidParameterError");
}
return this._chain(() => this.getPermission()
.then(() => new this._win.Promise((resolve, reject) => {
this._onSetLocalDescriptionSuccess = resolve;
this._onSetLocalDescriptionFailure = reject;
this._impl.setLocalDescription(type, desc.sdp);
})));
});
},
_validateIdentity: function(sdp, origin) {
let expectedIdentity;
// 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().
let validation = this._lastIdentityValidation
.then(() => this._remoteIdp.verifyIdentityFromSDP(sdp, origin))
.then(msg => {
expectedIdentity = this._impl.peerIdentity;
// If this pc has an identity already, then the identity in sdp must match
if (expectedIdentity && (!msg || msg.identity !== expectedIdentity)) {
this.close();
throw new this._win.DOMException(
"Peer Identity mismatch, expected: " + expectedIdentity,
"IncompatibleSessionDescriptionError");
}
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));
}
})
.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._peerIdentity = new this._win.Promise((resolve, reject) => {
this._resolvePeerIdentity = resolve;
this._rejectPeerIdentity = reject;
});
}
throw e;
});
this._lastIdentityValidation = validation.catch(() => {});
// Only wait for IdP validation if we need identity matching
return expectedIdentity ? validation : this._win.Promise.resolve();
},
setRemoteDescription: function(desc, onSuccess, onError) {
return this._legacyCatch(onSuccess, onError, () => {
this._remoteType = desc.type;
let type;
switch (desc.type) {
case "offer":
type = Ci.IPeerConnection.kActionOffer;
break;
case "answer":
type = Ci.IPeerConnection.kActionAnswer;
break;
case "pranswer":
throw new this._win.DOMException("pranswer not yet implemented",
"NotSupportedError");
case "rollback":
type = Ci.IPeerConnection.kActionRollback;
break;
default:
throw new this._win.DOMException(
"Invalid type " + desc.type + " provided to setRemoteDescription",
"InvalidParameterError");
}
if (!desc.sdp && desc.type !== "rollback") {
throw new this._win.DOMException(
"Empty or null SDP provided to setRemoteDescription",
"InvalidParameterError");
}
// Get caller's origin before hitting the promise chain
let origin = Cu.getWebIDLCallerPrincipal().origin;
return this._chain(() => {
let setRem = this.getPermission()
.then(() => new this._win.Promise((resolve, reject) => {
this._onSetRemoteDescriptionSuccess = resolve;
this._onSetRemoteDescriptionFailure = reject;
this._impl.setRemoteDescription(type, desc.sdp);
}));
if (desc.type === "rollback") {
return setRem;
}
// Do setRemoteDescription and identity validation in parallel
let validId = this._validateIdentity(desc.sdp, origin);
return this._win.Promise.all([setRem, validId])
.then(() => {}); // must return undefined
});
});
},
setIdentityProvider: function(provider, protocol, username) {
this._checkClosed();
this._localIdp.setIdentityProvider(provider, protocol, username);
},
getIdentityAssertion: function() {
let origin = Cu.getWebIDLCallerPrincipal().origin;
return this._chain(
() => this._certificateReady.then(
() => this._localIdp.getIdentityAssertion(this._impl.fingerprint, origin)
)
);
},
updateIce: function(config) {
throw new this._win.DOMException("updateIce not yet implemented",
"NotSupportedError");
},
addIceCandidate: function(c, onSuccess, onError) {
return this._legacyCatch(onSuccess, onError, () => {
if (!c.candidate && !c.sdpMLineIndex) {
throw new this._win.DOMException("Invalid candidate passed to addIceCandidate!",
"InvalidParameterError");
}
return this._chain(() => new this._win.Promise((resolve, reject) => {
this._onAddIceCandidateSuccess = resolve;
this._onAddIceCandidateError = reject;
this._impl.addIceCandidate(c.candidate, c.sdpMid || "", c.sdpMLineIndex);
}));
});
},
addStream: function(stream) {
stream.getTracks().forEach(track => this.addTrack(track, stream));
},
removeStream: function(stream) {
// Bug 844295: Not implementing this functionality.
throw new this._win.DOMException("removeStream not yet implemented",
"NotSupportedError");
},
getStreamById: function(id) {
throw new this._win.DOMException("getStreamById not yet implemented",
"NotSupportedError");
},
addTrack: function(track, stream) {
if (stream.currentTime === undefined) {
throw new this._win.DOMException("invalid stream.", "InvalidParameterError");
}
if (stream.getTracks().indexOf(track) < 0) {
throw new this._win.DOMException("track is not in stream.",
"InvalidParameterError");
}
this._checkClosed();
this._senders.forEach(sender => {
if (sender.track == track) {
throw new this._win.DOMException("already added.",
"InvalidParameterError");
}
});
this._impl.addTrack(track, stream);
let sender = this._win.RTCRtpSender._create(this._win,
new RTCRtpSender(this, track,
stream));
this._senders.push(sender);
return sender;
},
removeTrack: function(sender) {
this._checkClosed();
var i = this._senders.indexOf(sender);
if (i >= 0) {
this._senders.splice(i, 1);
this._impl.removeTrack(sender.track); // fires negotiation needed
}
},
_replaceTrack: function(sender, withTrack) {
// TODO: Do a (sender._stream.getTracks().indexOf(track) < 0) check
// on both track args someday.
//
// The proposed API will be that both tracks must already be in the same
// stream. However, since our MediaStreams currently are limited to one
// track per type, we allow replacement with an outside track not already
// in the same stream.
//
// Since a track may be replaced more than once, the track being replaced
// may not be in the stream either, so we check neither arg right now.
return new this._win.Promise((resolve, reject) => {
this._onReplaceTrackSender = sender;
this._onReplaceTrackWithTrack = withTrack;
this._onReplaceTrackSuccess = resolve;
this._onReplaceTrackFailure = reject;
this._impl.replaceTrack(sender.track, withTrack);
});
},
close: function() {
if (this._closed) {
return;
}
this.changeIceConnectionState("closed");
this._localIdp.close();
this._remoteIdp.close();
this._impl.close();
this._closed = true;
},
getLocalStreams: function() {
this._checkClosed();
return this._impl.getLocalStreams();
},
getRemoteStreams: function() {
this._checkClosed();
return this._impl.getRemoteStreams();
},
getSenders: function() {
return this._senders;
},
getReceivers: function() {
return this._receivers;
},
get localDescription() {
this._checkClosed();
let sdp = this._impl.localDescription;
if (sdp.length == 0) {
return null;
}
sdp = this._localIdp.addIdentityAttribute(sdp);
return new this._win.RTCSessionDescription({ type: this._localType,
sdp: sdp });
},
get remoteDescription() {
this._checkClosed();
let sdp = this._impl.remoteDescription;
if (sdp.length == 0) {
return null;
}
return new this._win.RTCSessionDescription({ type: this._remoteType,
sdp: 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._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 {
"SignalingInvalid": "",
"SignalingStable": "stable",
"SignalingHaveLocalOffer": "have-local-offer",
"SignalingHaveRemoteOffer": "have-remote-offer",
"SignalingHaveLocalPranswer": "have-local-pranswer",
"SignalingHaveRemotePranswer": "have-remote-pranswer",
"SignalingClosed": "closed"
}[this._impl.signalingState];
},
changeIceGatheringState: function(state) {
this._iceGatheringState = state;
_globalPCList.notifyLifecycleObservers(this, "icegatheringstatechange");
},
changeIceConnectionState: function(state) {
this._iceConnectionState = state;
_globalPCList.notifyLifecycleObservers(this, "iceconnectionstatechange");
this.dispatchEvent(new this._win.Event("iceconnectionstatechange"));
},
getStats: function(selector, onSuccess, onError) {
return this._legacyCatch(onSuccess, onError, () => {
return this._chain(() => new this._win.Promise((resolve, reject) => {
this._onGetStatsSuccess = resolve;
this._onGetStatsFailure = reject;
this._impl.getStats(selector);
}));
});
},
createDataChannel: function(label, dict) {
this._checkClosed();
if (dict == undefined) {
dict = {};
}
if (dict.maxRetransmitNum != undefined) {
dict.maxRetransmits = dict.maxRetransmitNum;
this.logWarning("Deprecated RTCDataChannelInit dictionary entry maxRetransmitNum used!", null, 0);
}
if (dict.outOfOrderAllowed != undefined) {
dict.ordered = !dict.outOfOrderAllowed; // the meaning is swapped with
// the name change
this.logWarning("Deprecated RTCDataChannelInit dictionary entry outOfOrderAllowed used!", null, 0);
}
if (dict.preset != undefined) {
dict.negotiated = dict.preset;
this.logWarning("Deprecated RTCDataChannelInit dictionary entry preset used!", null, 0);
}
if (dict.stream != undefined) {
dict.id = dict.stream;
this.logWarning("Deprecated RTCDataChannelInit dictionary entry stream used!", null, 0);
}
if (dict.maxRetransmitTime !== null && dict.maxRetransmits !== null) {
throw new this._win.DOMException(
"Both maxRetransmitTime and maxRetransmits cannot be provided",
"InvalidParameterError");
}
let protocol;
if (dict.protocol == undefined) {
protocol = "";
} else {
protocol = dict.protocol;
}
// Must determine the type where we still know if entries are undefined.
let type;
if (dict.maxRetransmitTime != undefined) {
type = Ci.IPeerConnection.kDataChannelPartialReliableTimed;
} else if (dict.maxRetransmits != undefined) {
type = Ci.IPeerConnection.kDataChannelPartialReliableRexmit;
} else {
type = Ci.IPeerConnection.kDataChannelReliable;
}
// Synchronous since it doesn't block.
let channel = this._impl.createDataChannel(
label, protocol, type, !dict.ordered, dict.maxRetransmitTime,
dict.maxRetransmits, dict.negotiated ? true : false,
dict.id != undefined ? dict.id : 0xFFFF
);
return channel;
}
};
// This is a separate object because we don't want to expose it to DOM.
function PeerConnectionObserver() {
this._dompc = null;
}
PeerConnectionObserver.prototype = {
classDescription: "PeerConnectionObserver",
classID: PC_OBS_CID,
contractID: PC_OBS_CONTRACT,
QueryInterface: XPCOMUtils.generateQI([Ci.nsISupports,
Ci.nsIDOMGlobalPropertyInitializer]),
init: function(win) { this._win = win; },
__init: function(dompc) {
this._dompc = dompc._innerObject;
},
newError: function(message, code) {
// These strings must match those defined in the WebRTC spec.
const reasonName = [
"",
"InternalError",
"InvalidCandidateError",
"InvalidParameterError",
"InvalidStateError",
"InvalidSessionDescriptionError",
"IncompatibleSessionDescriptionError",
"InternalError",
"IncompatibleMediaStreamTrackError",
"InternalError"
];
let name = reasonName[Math.min(code, reasonName.length - 1)];
return new this._dompc._win.DOMException(message, name);
},
dispatchEvent: function(event) {
this._dompc.dispatchEvent(event);
},
onCreateOfferSuccess: function(sdp) {
this._dompc._onCreateOfferSuccess(sdp);
},
onCreateOfferError: function(code, message) {
this._dompc._onCreateOfferFailure(this.newError(message, code));
},
onCreateAnswerSuccess: function(sdp) {
this._dompc._onCreateAnswerSuccess(sdp);
},
onCreateAnswerError: function(code, message) {
this._dompc._onCreateAnswerFailure(this.newError(message, code));
},
onSetLocalDescriptionSuccess: function() {
this._dompc._onSetLocalDescriptionSuccess();
},
onSetRemoteDescriptionSuccess: function() {
this._dompc._onSetRemoteDescriptionSuccess();
},
onSetLocalDescriptionError: function(code, message) {
this._localType = null;
this._dompc._onSetLocalDescriptionFailure(this.newError(message, code));
},
onSetRemoteDescriptionError: function(code, message) {
this._remoteType = null;
this._dompc._onSetRemoteDescriptionFailure(this.newError(message, code));
},
onAddIceCandidateSuccess: function() {
this._dompc._onAddIceCandidateSuccess();
},
onAddIceCandidateError: function(code, message) {
this._dompc._onAddIceCandidateError(this.newError(message, code));
},
onIceCandidate: function(level, mid, candidate) {
if (candidate == "") {
this.foundIceCandidate(null);
} else {
this.foundIceCandidate(new this._dompc._win.RTCIceCandidate(
{
candidate: candidate,
sdpMid: mid,
sdpMLineIndex: level
}
));
}
},
onNegotiationNeeded: function() {
this.dispatchEvent(new this._win.Event("negotiationneeded"));
},
// This method is primarily responsible for updating iceConnectionState.
// This state is defined in the WebRTC specification as follows:
//
// iceConnectionState:
// -------------------
// new The ICE Agent is gathering addresses and/or waiting for
// remote candidates to be supplied.
//
// checking The ICE Agent has received remote candidates on at least
// one component, and is checking candidate pairs but has not
// yet found a connection. In addition to checking, it may
// also still be gathering.
//
// connected The ICE Agent has found a usable connection for all
// components but is still checking other candidate pairs to
// see if there is a better connection. It may also still be
// gathering.
//
// completed The ICE Agent has finished gathering and checking and found
// a connection for all components. Open issue: it is not
// clear how the non controlling ICE side knows it is in the
// state.
//
// failed The ICE Agent is finished checking all candidate pairs and
// failed to find a connection for at least one component.
// Connections may have been found for some components.
//
// disconnected Liveness checks have failed for one or more components.
// This is more aggressive than failed, and may trigger
// intermittently (and resolve itself without action) on a
// flaky network.
//
// closed The ICE Agent has shut down and is no longer responding to
// STUN requests.
handleIceConnectionStateChange: function(iceConnectionState) {
var histogram = Services.telemetry.getHistogramById("WEBRTC_ICE_SUCCESS_RATE");
if (iceConnectionState === 'failed') {
histogram.add(false);
this._dompc.logError("ICE failed, see about:webrtc for more details", null, 0);
}
if (this._dompc.iceConnectionState === 'checking' &&
(iceConnectionState === 'completed' ||
iceConnectionState === 'connected')) {
histogram.add(true);
}
this._dompc.changeIceConnectionState(iceConnectionState);
},
// This method is responsible for updating iceGatheringState. This
// state is defined in the WebRTC specification as follows:
//
// iceGatheringState:
// ------------------
// new The object was just created, and no networking has occurred
// yet.
//
// gathering The ICE engine is in the process of gathering candidates for
// this RTCPeerConnection.
//
// complete The ICE engine has completed gathering. Events such as adding
// a new interface or a new TURN server will cause the state to
// go back to gathering.
//
handleIceGatheringStateChange: function(gatheringState) {
this._dompc.changeIceGatheringState(gatheringState);
},
onStateChange: function(state) {
switch (state) {
case "SignalingState":
this.dispatchEvent(new this._win.Event("signalingstatechange"));
break;
case "IceConnectionState":
this.handleIceConnectionStateChange(this._dompc._pc.iceConnectionState);
break;
case "IceGatheringState":
this.handleIceGatheringStateChange(this._dompc._pc.iceGatheringState);
break;
case "SdpState":
// No-op
break;
case "ReadyState":
// No-op
break;
case "SipccState":
// No-op
break;
default:
this._dompc.logWarning("Unhandled state type: " + state, null, 0);
break;
}
},
onGetStatsSuccess: function(dict) {
let chromeobj = new RTCStatsReport(this._dompc._win, dict);
let webidlobj = this._dompc._win.RTCStatsReport._create(this._dompc._win,
chromeobj);
chromeobj.makeStatsPublic();
this._dompc._onGetStatsSuccess(webidlobj);
},
onGetStatsError: function(code, message) {
this._dompc._onGetStatsFailure(this.newError(message, code));
},
onAddStream: function(stream) {
let ev = new this._dompc._win.MediaStreamEvent("addstream",
{ stream: stream });
this.dispatchEvent(ev);
},
onRemoveStream: function(stream, type) {
this.dispatchEvent(new this._dompc._win.MediaStreamEvent("removestream",
{ stream: stream }));
},
onAddTrack: function(track) {
let ev = new this._dompc._win.MediaStreamTrackEvent("addtrack",
{ track: track });
this.dispatchEvent(ev);
},
onRemoveTrack: function(track, type) {
this.dispatchEvent(new this._dompc._win.MediaStreamTrackEvent("removetrack",
{ track: track }));
},
onReplaceTrackSuccess: function() {
var pc = this._dompc;
pc._onReplaceTrackSender.track = pc._onReplaceTrackWithTrack;
pc._onReplaceTrackWithTrack = null;
pc._onReplaceTrackSender = null;
pc._onReplaceTrackSuccess();
},
onReplaceTrackError: function(code, message) {
var pc = this._dompc;
pc._onReplaceTrackWithTrack = null;
pc._onReplaceTrackSender = null;
pc._onReplaceTrackFailure(this.newError(message, code));
},
foundIceCandidate: function(cand) {
this.dispatchEvent(new this._dompc._win.RTCPeerConnectionIceEvent("icecandidate",
{ candidate: cand } ));
},
notifyDataChannel: function(channel) {
this.dispatchEvent(new this._dompc._win.RTCDataChannelEvent("datachannel",
{ channel: channel }));
}
};
function RTCPeerConnectionStatic() {
}
RTCPeerConnectionStatic.prototype = {
classDescription: "RTCPeerConnectionStatic",
QueryInterface: XPCOMUtils.generateQI([Ci.nsISupports,
Ci.nsIDOMGlobalPropertyInitializer]),
classID: PC_STATIC_CID,
contractID: PC_STATIC_CONTRACT,
init: function(win) {
this._winID = win.QueryInterface(Ci.nsIInterfaceRequestor)
.getInterface(Ci.nsIDOMWindowUtils).currentInnerWindowID;
},
registerPeerConnectionLifecycleCallback: function(cb) {
_globalPCList._registerPeerConnectionLifecycleCallback(this._winID, cb);
},
};
function RTCRtpSender(pc, track, stream) {
this._pc = pc;
this.track = track;
this._stream = stream;
}
RTCRtpSender.prototype = {
classDescription: "RTCRtpSender",
classID: PC_SENDER_CID,
contractID: PC_SENDER_CONTRACT,
QueryInterface: XPCOMUtils.generateQI([Ci.nsISupports]),
replaceTrack: function(withTrack) {
return this._pc._chain(() => this._pc._replaceTrack(this, withTrack));
}
};
function RTCRtpReceiver(pc, track) {
this.pc = pc;
this.track = track;
}
RTCRtpReceiver.prototype = {
classDescription: "RTCRtpReceiver",
classID: PC_RECEIVER_CID,
contractID: PC_RECEIVER_CONTRACT,
QueryInterface: XPCOMUtils.generateQI([Ci.nsISupports]),
};
function CreateOfferRequest(windowID, innerWindowID, callID, isSecure) {
this.windowID = windowID;
this.innerWindowID = innerWindowID;
this.callID = callID;
this.isSecure = isSecure;
}
CreateOfferRequest.prototype = {
classDescription: "CreateOfferRequest",
classID: PC_COREQUEST_CID,
contractID: PC_COREQUEST_CONTRACT,
QueryInterface: XPCOMUtils.generateQI([Ci.nsISupports]),
};
this.NSGetFactory = XPCOMUtils.generateNSGetFactory(
[GlobalPCList,
RTCIceCandidate,
RTCSessionDescription,
RTCPeerConnection,
RTCPeerConnectionStatic,
RTCRtpReceiver,
RTCRtpSender,
RTCStatsReport,
PeerConnectionObserver,
CreateOfferRequest]
);
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