WebRTC revisions and updates including the addition of secure connections.

domain-server/resources/describe-settings.json

@@ -1,5 +1,5 @@
 {
-  "version": 2.5,
+  "version": 2.6,
   "settings": [
     {
       "name": "metaverse",
@@ -73,6 +73,28 @@
         }
       ]
     },
+    {
+      "name": "webrtc",
+      "label": "Networking / WebRTC",
+      "settings": [
+        {
+          "name": "enable_webrtc",
+          "label": "Enable WebRTC Client Connections",
+          "help": "Allow web clients to connect over WebRTC data channels.",
+          "type": "checkbox",
+          "default": false,
+          "advanced": true
+        },
+        {
+            "name": "enable_webrtc_websocket_ssl",
+            "label": "Enable WebRTC WebSocket SSL",
+            "help": "Use secure WebSocket (wss:// protocol) for WebRTC signaling channel. If \"on\", the key, cert, and CA files are expected to be in the local Vircadia app directory, in a /domain-server/ subdirectory with filenames vircadia-cert.key, vircadia-cert.crt, and vircadia-crt-ca.crt.",
+            "type": "checkbox",
+            "default": false,
+            "advanced": true
+        }
+      ]
+    },
     {
       "name": "authentication",
       "label": "Networking / WordPress OAuth2",

domain-server/src/DomainServer.cpp

@@ -196,10 +196,6 @@ DomainServer::DomainServer(int argc, char* argv[]) :
     _gatekeeper(this),
     _httpManager(QHostAddress::AnyIPv4, DOMAIN_SERVER_HTTP_PORT,
         QString("%1/resources/web/").arg(QCoreApplication::applicationDirPath()), this)
-#if defined(WEBRTC_DATA_CHANNELS)
-    ,
-    _webrtcSignalingServer(this)
-#endif
 {
     if (_parentPID != -1) {
         watchParentProcess(_parentPID);
@@ -275,14 +271,30 @@ DomainServer::DomainServer(int argc, char* argv[]) :
 
     _settingsManager.apiRefreshGroupInformation();
 
+#if defined(WEBRTC_DATA_CHANNELS)
+    const QString WEBRTC_ENABLE = "webrtc.enable_webrtc";
+    bool isWebRTCEnabled = _settingsManager.valueForKeyPath(WEBRTC_ENABLE).toBool();
+    qCDebug(domain_server) << "WebRTC enabled:" << isWebRTCEnabled;
+    // The domain server's WebRTC signaling server is used by the domain server and the assignment clients, so disabling it
+    // disables WebRTC for the server as a whole.
+    if (isWebRTCEnabled) {
+        const QString WEBRTC_WSS_ENABLE = "webrtc.enable_webrtc_websocket_ssl";
+        bool isWebRTCEnabled = _settingsManager.valueForKeyPath(WEBRTC_WSS_ENABLE).toBool();
+        qCDebug(domain_server) << "WebRTC WSS enabled:" << isWebRTCEnabled;
+        _webrtcSignalingServer.reset(new WebRTCSignalingServer(this, isWebRTCEnabled));
+    }
+#endif
+
     setupNodeListAndAssignments();
 
     updateReplicatedNodes();
     updateDownstreamNodes();
     updateUpstreamNodes();
 
 #if defined(WEBRTC_DATA_CHANNELS)
-    setUpWebRTCSignalingServer();
+    if (isWebRTCEnabled) {
+        setUpWebRTCSignalingServer();
+    }
 #endif
 
     if (_type != NonMetaverse) {
@@ -889,7 +901,7 @@ void DomainServer::setupNodeListAndAssignments() {
 // Sets up the WebRTC signaling server that's hosted by the domain server.
 void DomainServer::setUpWebRTCSignalingServer() {
     // Bind the WebRTC signaling server's WebSocket to its port.
-    bool isBound = _webrtcSignalingServer.bind(QHostAddress::AnyIPv4, DEFAULT_DOMAIN_SERVER_WS_PORT);
+    bool isBound = _webrtcSignalingServer->bind(QHostAddress::AnyIPv4, DEFAULT_DOMAIN_SERVER_WS_PORT);
     if (!isBound) {
         qWarning() << "WebRTC signaling server not bound to port. WebRTC connections are not supported.";
         return;
@@ -898,21 +910,22 @@ void DomainServer::setUpWebRTCSignalingServer() {
     auto limitedNodeList = DependencyManager::get<LimitedNodeList>();
 
     // Route inbound WebRTC signaling messages received from user clients.
-    connect(&_webrtcSignalingServer, &WebRTCSignalingServer::messageReceived, 
+    connect(_webrtcSignalingServer.get(), &WebRTCSignalingServer::messageReceived, 
         this, &DomainServer::routeWebRTCSignalingMessage);
 
     // Route domain server signaling messages.
     auto webrtcSocket = limitedNodeList->getWebRTCSocket();
     connect(this, &DomainServer::webrtcSignalingMessageForDomainServer, webrtcSocket, &WebRTCSocket::onSignalingMessage);
-    connect(webrtcSocket, &WebRTCSocket::sendSignalingMessage, &_webrtcSignalingServer, &WebRTCSignalingServer::sendMessage);
+    connect(webrtcSocket, &WebRTCSocket::sendSignalingMessage,
+        _webrtcSignalingServer.get(), &WebRTCSignalingServer::sendMessage);
 
     // Forward signaling messages received from assignment clients to user client.
     PacketReceiver& packetReceiver = limitedNodeList->getPacketReceiver();
     packetReceiver.registerListener(PacketType::WebRTCSignaling,
         PacketReceiver::makeUnsourcedListenerReference<DomainServer>(this, 
             &DomainServer::forwardAssignmentClientSignalingMessageToUserClient));
     connect(this, &DomainServer::webrtcSignalingMessageForUserClient, 
-        &_webrtcSignalingServer, &WebRTCSignalingServer::sendMessage);
+        _webrtcSignalingServer.get(), &WebRTCSignalingServer::sendMessage);
 }
 
 // Routes an inbound WebRTC signaling message received from a client app to the appropriate recipient.

domain-server/src/DomainServer.h

@@ -333,7 +333,7 @@ private slots:
     QThread _assetClientThread;
 
 #if defined(WEBRTC_DATA_CHANNELS)
-    WebRTCSignalingServer _webrtcSignalingServer;
+    std::unique_ptr<WebRTCSignalingServer> _webrtcSignalingServer { nullptr };
 #endif
 };
 

domain-server/src/DomainServerSettingsManager.cpp

@@ -551,6 +551,8 @@ void DomainServerSettingsManager::setupConfigMap(const QString& userConfigFilena
             packPermissions();
         }
 
+        // No migration needed to version 2.6.
+
         // write the current description version to our settings
         *versionVariant = _descriptionVersion;
 

interface/src/avatar/OtherAvatar.cpp

@@ -64,7 +64,11 @@ void OtherAvatar::removeOrb() {
 void OtherAvatar::updateOrbPosition() {
     if (!_otherAvatarOrbMeshPlaceholderID.isNull()) {
         EntityItemProperties properties;
-        properties.setPosition(getHead()->getPosition());
+        glm::vec3 headPosition;
+        if (!_skeletonModel->getHeadPosition(headPosition)) {
+            headPosition = getWorldPosition();
+        }
+        properties.setPosition(headPosition);
         DependencyManager::get<EntityScriptingInterface>()->editEntity(_otherAvatarOrbMeshPlaceholderID, properties);
     }
 }

libraries/networking/src/webrtc/WebRTCDataChannels.cpp

@@ -20,7 +20,12 @@
 // - https://webrtc.github.io/webrtc-org/native-code/native-apis/
 // - https://webrtc.googlesource.com/src/+/master/api/peer_connection_interface.h
 
-const std::string ICE_SERVER_URI = "stun://ice.vircadia.com:7337";
+// FIXME: stun:ice.vircadia.com:7337 doesn't work for WebRTC.
+// Firefox warns: "WebRTC: Using more than two STUN/TURN servers slows down discovery"
+const std::list<std::string> ICE_SERVER_URIS = {
+    "stun:stun1.l.google.com:19302",
+    "stun:stun.schlund.de"
+};
 const int MAX_WEBRTC_BUFFER_SIZE = 16777216;  // 16MB
 
 // #define WEBRTC_DEBUG
@@ -66,15 +71,15 @@ WDCPeerConnectionObserver::WDCPeerConnectionObserver(WDCConnection* parent) :
 
 void WDCPeerConnectionObserver::OnSignalingChange(PeerConnectionInterface::SignalingState newState) {
 #ifdef WEBRTC_DEBUG
-    QStringList states{
+    QStringList states {
         "Stable",
         "HaveLocalOffer",
         "HaveLocalPrAnswer",
         "HaveRemoteOffer",
         "HaveRemotePrAnswer",
         "Closed"
     };
-    qCDebug(networking_webrtc) << "WDCPeerConnectionObserver::OnSignalingChange()" << newState << states[newState];
+    qCDebug(networking_webrtc) << "WDCPeerConnectionObserver::OnSignalingChange() :" << newState << states[newState];
 #endif
 }
 
@@ -86,7 +91,12 @@ void WDCPeerConnectionObserver::OnRenegotiationNeeded() {
 
 void WDCPeerConnectionObserver::OnIceGatheringChange(PeerConnectionInterface::IceGatheringState newState) {
 #ifdef WEBRTC_DEBUG
-    qCDebug(networking_webrtc) << "WDCPeerConnectionObserver::OnIceGatheringChange()" << newState;
+    QStringList states {
+        "New",
+        "Gathering",
+        "Complete"
+    };
+    qCDebug(networking_webrtc) << "WDCPeerConnectionObserver::OnIceGatheringChange() :" << newState << states[newState];
 #endif
 }
 
@@ -97,6 +107,39 @@ void WDCPeerConnectionObserver::OnIceCandidate(const IceCandidateInterface* cand
     _parent->sendIceCandidate(candidate);
 }
 
+void WDCPeerConnectionObserver::OnIceConnectionChange(PeerConnectionInterface::IceConnectionState newState) {
+#ifdef WEBRTC_DEBUG
+    QStringList states {
+        "New",
+        "Checking",
+        "Connected",
+        "Completed",
+        "Failed",
+        "Disconnected",
+        "Closed",
+        "Max"
+    };
+    qCDebug(networking_webrtc) << "WDCPeerConnectionObserver::OnIceConnectionChange() :" << newState << states[newState];
+#endif
+}
+
+void WDCPeerConnectionObserver::OnStandardizedIceConnectionChange(PeerConnectionInterface::IceConnectionState newState) {
+#ifdef WEBRTC_DEBUG
+    QStringList states {
+        "New",
+        "Checking",
+        "Connected",
+        "Completed",
+        "Failed",
+        "Disconnected",
+        "Closed",
+        "Max"
+    };
+    qCDebug(networking_webrtc) << "WDCPeerConnectionObserver::OnStandardizedIceConnectionChange() :" << newState
+        << states[newState];
+#endif
+}
+
 void WDCPeerConnectionObserver::OnDataChannel(rtc::scoped_refptr<DataChannelInterface> dataChannel) {
 #ifdef WEBRTC_DEBUG
     qCDebug(networking_webrtc) << "WDCPeerConnectionObserver::OnDataChannel()";
@@ -106,7 +149,16 @@ void WDCPeerConnectionObserver::OnDataChannel(rtc::scoped_refptr<DataChannelInte
 
 void WDCPeerConnectionObserver::OnConnectionChange(PeerConnectionInterface::PeerConnectionState newState) {
 #ifdef WEBRTC_DEBUG
-    qCDebug(networking_webrtc) << "WDCPeerConnectionObserver::OnConnectionChange()" << (uint)newState;
+    QStringList states {
+        "New",
+        "Connecting",
+        "Connected",
+        "Disconnected",
+        "Failed",
+        "Closed"
+    };
+    qCDebug(networking_webrtc) << "WDCPeerConnectionObserver::OnConnectionChange() :" << (uint)newState
+        << states[(uint)newState];
 #endif
     _parent->onPeerConnectionStateChanged(newState);
 }
@@ -262,15 +314,15 @@ void WDCConnection::sendIceCandidate(const IceCandidateInterface* candidate) {
 
 void WDCConnection::onPeerConnectionStateChanged(PeerConnectionInterface::PeerConnectionState state) {
 #ifdef WEBRTC_DEBUG
-    const char* STATES[] = {
+    QStringList states {
         "New",
         "Connecting",
         "Connected",
         "Disconnected",
         "Failed",
         "Closed"
     };
-    qCDebug(networking_webrtc) << "WDCConnection::onPeerConnectionStateChanged() :" << (int)state << STATES[(int)state];
+    qCDebug(networking_webrtc) << "WDCConnection::onPeerConnectionStateChanged() :" << (int)state << states[(int)state];
 #endif
 }
 
@@ -303,13 +355,11 @@ void WDCConnection::onDataChannelStateChanged() {
         << DataChannelInterface::DataStateString(state);
 #endif
     if (state == DataChannelInterface::kClosed) {
-        // Close data channel.
+        // Finish with the data channel.
         _dataChannel->UnregisterObserver();
+        // Don't set _dataChannel = nullptr because it is a scoped_refptr.
         _dataChannelObserver = nullptr;
-        _dataChannel = nullptr;
-#ifdef WEBRTC_DEBUG
-        qCDebug(networking_webrtc) << "Disposed of data channel";
-#endif
+
         // Close peer connection.
         _parent->closePeerConnection(this);
     }
@@ -344,17 +394,21 @@ qint64 WDCConnection::getBufferedAmount() const {
 #ifdef WEBRTC_DEBUG
     qCDebug(networking_webrtc) << "WDCConnection::getBufferedAmount()";
 #endif
-    return _dataChannel ? _dataChannel->buffered_amount() : 0;
+    return _dataChannel && _dataChannel->state() != DataChannelInterface::kClosing 
+            && _dataChannel->state() != DataChannelInterface::kClosed 
+        ? _dataChannel->buffered_amount() : 0;
 }
 
 bool WDCConnection::sendDataMessage(const DataBuffer& buffer) {
 #ifdef WEBRTC_DEBUG
     qCDebug(networking_webrtc) << "WDCConnection::sendDataMessage()";
-    if (!_dataChannel) {
+    if (!_dataChannel || _dataChannel->state() == DataChannelInterface::kClosing
+        || _dataChannel->state() == DataChannelInterface::kClosed) {
         qCDebug(networking_webrtc) << "No data channel to send on";
     }
 #endif
-    if (!_dataChannel) {
+    if (!_dataChannel || _dataChannel->state() == DataChannelInterface::kClosing 
+            || _dataChannel->state() == DataChannelInterface::kClosed) {
         // Data channel may have been closed while message to send was being prepared.
         return false;
     } else if (_dataChannel->buffered_amount() + buffer.size() > MAX_WEBRTC_BUFFER_SIZE) {
@@ -367,10 +421,10 @@ bool WDCConnection::sendDataMessage(const DataBuffer& buffer) {
 
 void WDCConnection::closePeerConnection() {
 #ifdef WEBRTC_DEBUG
-    qCDebug(networking_webrtc) << "WDCConnection::closePeerConnection()";
+    qCDebug(networking_webrtc) << "WDCConnection::closePeerConnection() :" << (int)_peerConnection->peer_connection_state();
 #endif
     _peerConnection->Close();
-    _peerConnection = nullptr;
+    // Don't set _peerConnection = nullptr because it is a scoped_refptr.
     _peerConnectionObserver = nullptr;
 #ifdef WEBRTC_DEBUG
     qCDebug(networking_webrtc) << "Disposed of peer connection";
@@ -425,6 +479,9 @@ WebRTCDataChannels::~WebRTCDataChannels() {
 }
 
 void WebRTCDataChannels::reset() {
+#ifdef WEBRTC_DEBUG
+    qCDebug(networking_webrtc) << "WebRTCDataChannels::reset() :" << _connectionsByID.count();
+#endif
     QHashIterator<QString, WDCConnection*> i(_connectionsByID);
     while (i.hasNext()) {
         i.next();
@@ -484,7 +541,8 @@ void WebRTCDataChannels::onSignalingMessage(const QJsonObject& message) {
 
     // Add a remote ICE candidate.
     if (data.contains("candidate")) {
-        connection->addIceCandidate(data);
+        auto candidate = data.value("candidate").toObject();
+        connection->addIceCandidate(candidate);
     }
 
 }
@@ -545,9 +603,11 @@ rtc::scoped_refptr<PeerConnectionInterface> WebRTCDataChannels::createPeerConnec
 #endif
 
     PeerConnectionInterface::RTCConfiguration configuration;
-    PeerConnectionInterface::IceServer iceServer;
-    iceServer.uri = ICE_SERVER_URI;
-    configuration.servers.push_back(iceServer);
+    for (const auto& uri : ICE_SERVER_URIS) {
+        PeerConnectionInterface::IceServer iceServer;
+        iceServer.uri = uri;
+        configuration.servers.push_back(iceServer);
+    }
 
 #ifdef WEBRTC_DEBUG
     qCDebug(networking_webrtc) << "2. Create a new peer connection";

libraries/networking/src/webrtc/WebRTCDataChannels.h

@@ -88,6 +88,14 @@ class WDCPeerConnectionObserver : public webrtc::PeerConnectionObserver {
     /// @param candidate The new ICE candidate.
     void OnIceCandidate(const webrtc::IceCandidateInterface* candidate) override;
 
+    /// @brief Called when the legacy ICE connection state changes.
+    /// @param new_state The new ICE connection state.
+    virtual void OnIceConnectionChange(webrtc::PeerConnectionInterface::IceConnectionState newState) override;
+
+    /// @brief Called when the standards-compliant ICE connection state changes.
+    /// @param new_state The new ICE connection state. 
+    virtual void OnStandardizedIceConnectionChange(webrtc::PeerConnectionInterface::IceConnectionState newState) override;
+
     /// @brief Called when a remote peer opens a data channel.
     /// @param dataChannel The data channel.
     void OnDataChannel(rtc::scoped_refptr<webrtc::DataChannelInterface> dataChannel) override;