LAN stuff (WIP)

javascript/eagswebrtc.js

@@ -324,59 +324,137 @@ window.initializeLANClient = (() => {
 	class EaglercraftLANClient {
 
 		constructor() {
-			
+			this.ICEServers = [];
+			this.peerConnection = null;
+			this.dataChannel = null;
+			this.readyState = READYSTATE_CONNECTING;
+			this.iceCandidateHandler = null;
+			this.descriptionHandler = null;
+			this.remoteDataChannelHandler = null;
+			this.remoteDisconnectHandler = null;
+			this.remotePacketHandler = null;
 		}
 		
 		LANClientSupported() {
-			
+			return typeof window.RTCPeerConnection !== "undefined";
 		}
 		
 		initializeClient() {
-			
+			try {
+				if(this.dataChannel != null) {
+					this.dataChannel.close();
+					this.dataChannel = null;
+				}
+				if(this.peerConnection != null) {
+					this.peerConnection.close();
+					this.peerConnection = null;
+				}
+				this.peerConnection = new RTCPeerConnection({ iceServers: this.ICEServers, optional: [ { DtlsSrtpKeyAgreement: true } ] });
+				this.readyState = READYSTATE_CONNECTING;
+			} catch (e) {
+				this.readyState = READYSTATE_INIT_FAILED;
+			}
 		}
 		
 		setICEServers(urls) {
-			
+			this.ICEServers.length = 0;
+			for(var i = 0; i < urls.length; ++i) {
+				var etr = urls[i].split(";");
+				if(etr.length == 1) {
+					this.ICEServers.push({ urls: etr[0] });
+				}else if(etr.length == 3) {
+					this.ICEServers.push({ urls: etr[0], username: etr[1], credential: etr[2] });
+				}
+			}
 		}
 		
 		setICECandidateHandler(cb) {
-			
+			this.iceCandidateHandler = cb;
 		}
 		
 		setDescriptionHandler(cb) {
-			
+			this.descriptionHandler = cb;
 		}
 		
 		setRemoteDataChannelHandler(cb) {
-			
+			this.remoteDataChannelHandler = cb;
 		}
 		
 		setRemoteDisconnectHandler(cb) {
-			
+			this.remoteDisconnectHandler = cb;
 		}
 		
 		setRemotePacketHandler(cb) {
-			
+			this.remotePacketHandler = cb;
 		}
 		
 		getReadyState() {
-			
+			return this.readyState;
 		}
 		
 		sendPacketToServer(buffer) {
-			
+			this.dataChannel.send(buffer);
 		}
 		
 		signalRemoteConnect() {
+			const self = this;
+			this.peerConnection.addEventListener("icecandidate", (evt) => {
+				if(evt.candidate) {
+					self.iceCandidateHandler(JSON.stringify({ sdpMLineIndex: evt.candidate.sdpMLineIndex, candidate: evt.candidate.candidate }));
+				}
+			});
 
+			this.peerConnection.addEventListener("datachannel", (evt) => {
+				self.channel = evt.channel;
+				self.remoteDataChannelHandler(self.channel);
+				evt.channel.addEventListener("message", (evt) => {
+					self.remotePacketHandler(evt.data);
+				});
+			});
+
+			this.peerConnection.createOffer((desc) => {
+				const selfDesc = desc;
+				self.peerConnection.setLocalDescription(selfDesc, () => {
+					self.descriptionHandler(JSON.stringify(selfDesc));
+				}, (err) => {
+					console.error("Failed to set local description! " + err);
+					self.readyState = READYSTATE_FAILED;
+					self.signalRemoteDisconnect();
+				});
+			}, (err) => {
+				console.error("Failed to set create offer! " + err);
+				self.readyState = READYSTATE_FAILED;
+				self.signalRemoteDisconnect();
+			});
+
+			this.peerConnection.addEventListener("connectionstatechange", (evt) => {
+				if(evt.connectionState === 'disconnected') {
+					self.signalRemoteDisconnect();
+				} else if (evt.connectionState === 'connected') {
+					self.readyState = READYSTATE_CONNECTED;
+				} else if (evt.connectionState === 'failed') {
+					self.readyState = READYSTATE_FAILED;
+					self.signalRemoteDisconnect();
+				}
+			});
 		}
 		
 		signalRemoteDescription(descJSON) {
-			
+			this.peerConnection.setRemoteDescription(descJSON);
 		}
 		
 		signalRemoteICECandidate(candidate) {
+			this.peerConnection.addICECandidate(candidate);
+		}
 
+		signalRemoteDisconnect() {
+			if(this.dataChannel != null) {
+				this.dataChannel.close();
+				this.dataChannel = null;
+			}
+			this.peerConnection.close();
+			this.remoteDisconnectHandler();
+			this.readyState = READYSTATE_DISCONNECTED;
 		}
 		
 	};
@@ -397,66 +475,244 @@ window.startLANClient = () => {
 
 window.initializeLANServer = (() => {
 
+	const PEERSTATE_FAILED = 0;
+	const PEERSTATE_SUCCESS = 1;
+	const PEERSTATE_LOADING = 2;
+
+	class EaglercraftLANPeer {
+
+		constructor(client, peerId, peerConnection) {
+			this.client = client;
+			this.peerId = peerId;
+			this.peerConnection = peerConnection;
+			this.dataChannel = null;
+
+			const self = this;
+			this.peerConnection.addEventListener("icecandidate", (evt) => {
+				if(evt.candidate) {
+					self.client.iceCandidateHandler(self.peerId, JSON.stringify({ sdpMLineIndex: evt.candidate.sdpMLineIndex, candidate: evt.candidate.candidate }));
+				}
+			});
+
+			this.dataChannel = this.peerConnection.createDataChannel("lan");
+
+			this.dataChannel.addEventListener("open", (evt) => {
+				self.client.remoteClientDataChannelHandler(self.peerId, this.dataChannel);
+			});
+
+			this.dataChannel.addEventListener("message", (evt) => {
+				self.client.remoteClientPacketHandler(self.peerId, evt.data);
+			});
+
+			this.peerConnection.addEventListener("connectionstatechange", (evt) => {
+				if(evt.connectionState === 'disconnected') {
+					self.client.signalRemoteDisconnect(self.peerId);
+				} else if (evt.connectionState === 'connected') {
+					if (self.client.peerState != PEERSTATE_SUCCESS) self.client.peerState = PEERSTATE_SUCCESS;
+				} else if (evt.connectionState === 'failed') {
+					if (self.client.peerState == PEERSTATE_LOADING) self.client.peerState = PEERSTATE_FAILED;
+					self.client.signalRemoteDisconnect(self.peerId);
+				}
+			});
+
+		}
+
+		disconnect() {
+			if(this.dataChannel != null) {
+				this.dataChannel.close();
+				this.dataChannel = null;
+			}
+			this.peerConnection.close();
+		}
+
+		setRemoteDescription(descJSON) {
+			const self = this;
+			try {
+				const remoteDesc = JSON.parse(descJSON);
+				this.peerConnection.setRemoteDescription(remoteDesc, () => {
+					if(remoteDesc.type == 'offer') {
+						self.peerConnection.createAnswer((desc) => {
+							const selfDesc = desc;
+							self.peerConnection.setLocalDescription(selfDesc, () => {
+								self.client.descriptionHandler(self.peerId, JSON.stringify(selfDesc));
+								if (self.client.peerStateDesc != PEERSTATE_SUCCESS) self.client.peerStateDesc = PEERSTATE_SUCCESS;
+							}, (err) => {
+								console.error("Failed to set local description for \"" + self.peerId + "\"! " + err);
+								if (self.client.peerStateDesc == PEERSTATE_LOADING) self.client.peerStateDesc = PEERSTATE_FAILED;
+								self.client.signalRemoteDisconnect(self.peerId);
+							});
+						}, (err) => {
+							console.error("Failed to create answer for \"" + self.peerId + "\"! " + err);
+							if (self.client.peerStateDesc == PEERSTATE_LOADING) self.client.peerStateDesc = PEERSTATE_FAILED;
+							self.client.signalRemoteDisconnect(self.peerId);
+						});
+					}
+				}, (err) => {
+					console.error("Failed to set remote description for \"" + self.peerId + "\"! " + err);
+					if (self.client.peerStateDesc == PEERSTATE_LOADING) self.client.peerStateDesc = PEERSTATE_FAILED;
+					self.client.signalRemoteDisconnect(self.peerId);
+				});
+			} catch (err) {
+				console.error("Failed to parse remote description for \"" + self.peerId + "\"! " + err);
+				if (self.client.peerStateDesc == PEERSTATE_LOADING) self.client.peerStateDesc = PEERSTATE_FAILED;
+				self.client.signalRemoteDisconnect(self.peerId);
+			}
+		}
+
+		addICECandidate(candidate) {
+			try {
+				this.peerConnection.addIceCandidate(new RTCIceCandidate(JSON.parse(candidate)));
+				if (this.client.peerStateIce != PEERSTATE_SUCCESS) this.client.peerStateIce = PEERSTATE_SUCCESS;
+			} catch (err) {
+				console.error("Failed to parse ice candidate for \"" + this.peerId + "\"! " + err);
+				if (this.client.peerStateIce == PEERSTATE_LOADING) this.client.peerStateIce = PEERSTATE_FAILED;
+				this.client.signalRemoteDisconnect(this.peerId);
+			}
+		}
+
+	}
+	
 	class EaglercraftLANServer {
 		
 		constructor() {
-			
+			this.ICEServers = [];
+			this.hasInit = false;
+			this.peerList = new Map();
+			this.readyState = READYSTATE_NONE;
+			this.peerState = PEERSTATE_LOADING;
+			this.peerStateConnect = PEERSTATE_LOADING;
+			this.peerStateInitial = PEERSTATE_LOADING;
+			this.peerStateDesc = PEERSTATE_LOADING;
+			this.peerStateIce = PEERSTATE_LOADING;
+			this.iceCandidateHandler = null;
+			this.descriptionHandler = null;
+			this.remoteClientDataChannelHandler = null;
+			this.remoteClientDisconnectHandler = null;
+			this.remoteClientPacketHandler = null;
 		}
 		
 		LANServerSupported() {
-			
+			return typeof window.RTCPeerConnection !== "undefined";
 		}
 		
 		initializeServer() {
-			
+			// nothing to do!
 		}
 		
 		setRecieveCodeHandler(cb) {
-			
+			// not yet implemented!
 		}
 		
 		setICEServers(urls) {
-			
+			this.ICEServers.length = 0;
+			for(var i = 0; i < urls.length; ++i) {
+				var etr = urls[i].split(";");
+				if(etr.length == 1) {
+					this.ICEServers.push({ urls: etr[0] });
+				}else if(etr.length == 3) {
+					this.ICEServers.push({ urls: etr[0], username: etr[1], credential: etr[2] });
+				}
+			}
 		}
 		
 		setICECandidateHandler(cb) {
-			
+			this.iceCandidateHandler = cb;
 		}
 		
 		setDescriptionHandler(cb) {
-			
+			this.descriptionHandler = cb;
 		}
 		
 		setRemoteClientDataChannelHandler(cb) {
-			
+			this.remoteClientDataChannelHandler = cb;
 		}
 		
 		setRemoteClientDisconnectHandler(cb) {
-			
+			this.remoteClientDisconnectHandler = cb;
 		}
 		
 		setRemoteClientPacketHandler(cb) {
-			
+			this.remoteClientPacketHandler = cb;
 		}
 		
 		sendPacketToRemoteClient(peerId, buffer) {
+			var thePeer = this.peerList.get(peerId);
+			if((typeof thePeer !== "undefined") && thePeer !== null) {
+				thePeer.dataChannel.send(buffer);
+			}
+		}
 
+		resetPeerStates() {
+			this.peerState = this.peerStateConnect = this.peerStateInitial = this.peerStateDesc = this.peerStateIce = PEERSTATE_LOADING;
+		}
+
+		getPeerState() {
+			return this.peerState;
+		}
+
+		getPeerStateConnect() {
+			return this.peerStateConnect;
+		}
+
+		getPeerStateInitial() {
+			return this.peerStateInitial;
+		}
+
+		getPeerStateDesc() {
+			return this.peerStateDesc;
+		}
+
+		getPeerStateIce() {
+			return this.peerStateIce;
 		}
 
 		signalRemoteConnect(peerId) {
-			
+			try {
+				const peerConnection = new RTCPeerConnection({ iceServers: this.ICEServers, optional: [ { DtlsSrtpKeyAgreement: true } ] });
+				const peerInstance = new EaglercraftLANPeer(this, peerId, peerConnection);
+				this.peerList.set(peerId, peerInstance);
+				if (this.peerStateConnect != PEERSTATE_SUCCESS) this.peerStateConnect = PEERSTATE_SUCCESS;
+			} catch (e) {
+				if (this.peerStateConnect == PEERSTATE_LOADING) this.peerStateConnect = PEERSTATE_FAILED;
+			}
 		}
 
 		signalRemoteDescription(peerId, descJSON) {
-			
+			var thePeer = this.peerList.get(peerId);
+			if((typeof thePeer !== "undefined") && thePeer !== null) {
+				thePeer.setRemoteDescription(descJSON);
+			}
 		}
 
 		signalRemoteICECandidate(peerId, candidate) {
-			
+			var thePeer = this.peerList.get(peerId);
+			if((typeof thePeer !== "undefined") && thePeer !== null) {
+				thePeer.addICECandidate(candidate);
+			}
 		}
 
-		disconnectRemotePeer(peerId) {
+		signalRemoteDisconnect(peerId) {
-			
+			if(peerId.length == 0) {
+				for(const thePeer of this.peerList.values()) {
+                	if((typeof thePeer !== "undefined") && thePeer !== null) {
+						this.peerList.delete(thePeer);
+						try {
+							thePeer.disconnect();
+						}catch(e) {}
+						this.remoteClientDisconnectHandler(peerId, quiet);
+					}
+                }
+                this.peerList.clear();
+				return;
+			}
+			var thePeer = this.peerList.get(peerId);
+			if((typeof thePeer !== "undefined") && thePeer !== null) {
+				this.peerList.delete(thePeer);
+				try {
+					thePeer.disconnect();
+				}catch(e) {}
+				this.remoteClientDisconnectHandler(peerId, quiet);
+			}
 		}
 		
 	};

src/teavm/java/net/lax1dude/eaglercraft/adapter/EaglerAdapterImpl2.java

@@ -2934,11 +2934,14 @@ public class EaglerAdapterImpl2 {
 		return !isLittleEndian;
 	}
 
-	private static EaglercraftLANClient rtcLANClient = null; //TODO
+	private static EaglercraftLANClient rtcLANClient = null;
 	
 	@JSBody(params = { }, script = "return window.startLANClient();")
 	private static native EaglercraftLANClient startRTCLANClient();
 
+	private static boolean clientLANinit = false;
+	private static final List<byte[]> clientLANPacketBuffer = new ArrayList<>();
+	
 	public static final int LAN_CLIENT_INIT_FAILED = -2;
 	public static final int LAN_CLIENT_FAILED = -1;
 	public static final int LAN_CLIENT_DISCONNECTED = 0;
@@ -2946,27 +2949,67 @@ public class EaglerAdapterImpl2 {
 	public static final int LAN_CLIENT_CONNECTED = 2;
 	
 	public static final boolean clientLANSupported() {
-		return true;
+		return rtcLANClient.LANClientSupported();
 	}
 	
 	public static final void clientLANSetServer(String relay, String peerId) {
+		if(!clientLANinit) {
+			clientLANinit = true;
+			rtcLANClient.setDescriptionHandler(new EaglercraftLANClient.DescriptionHandler() {
+				@Override
+				public void call(String description) {
 
 				}
+			});
+			rtcLANClient.setICECandidateHandler(new EaglercraftLANClient.ICECandidateHandler() {
+				@Override
+				public void call(String candidate) {
+
+				}
+			});
+			rtcLANClient.setRemoteDataChannelHandler(new EaglercraftLANClient.ClientSignalHandler() {
+				@Override
+				public void call() {
+					// basically useless, ignore for now.
+				}
+			});
+			rtcLANClient.setRemotePacketHandler(new EaglercraftLANClient.RemotePacketHandler() {
+				@Override
+				public void call(ArrayBuffer buffer) {
+					Uint8Array array = Uint8Array.create(buffer);
+					byte[] ret = new byte[array.getByteLength()];
+					for(int i = 0; i < ret.length; ++i) {
+						ret[i] = (byte) array.get(i);
+					}
+					clientLANPacketBuffer.add(ret);
+				}
+			});
+			rtcLANClient.setRemoteDisconnectHandler(new EaglercraftLANClient.ClientSignalHandler() {
+				@Override
+				public void call() {
+					// disconnected
+				}
+			});
+		}
+		// todo: java-side: register with relay and set server
+	}
 	
 	public static final int clientLANReadyState() {
-		return 0;
+		return rtcLANClient.getReadyState();
 	}
 	
 	public static final void clientLANCloseConnection() {
-		
+		rtcLANClient.signalRemoteDisconnect();
 	}
 	
 	public static final void clientLANSendPacket(byte[] pkt) {
-		
+		ArrayBuffer arr = ArrayBuffer.create(pkt.length);
+		Uint8Array.create(arr).set(pkt);
+		rtcLANClient.sendPacketToServer(arr);
 	}
 	
 	public static final byte[] clientLANReadPacket() {
-		return null;
+		return clientLANPacketBuffer.size() > 0 ? clientLANPacketBuffer.remove(0) : null;
 	}
 	
 	private static EaglercraftLANServer rtcLANServer = null;
@@ -2974,11 +3017,60 @@ public class EaglerAdapterImpl2 {
 	@JSBody(params = { }, script = "return window.startLANServer();")
 	private static native EaglercraftLANServer startRTCLANServer();
 
+	private static boolean serverLANinit = false;
+	private static final List<LANPeerPacket> serverLANPacketBuffer = new ArrayList<>();
+	
 	public static final boolean serverLANSupported() {
-		return true;
+		return rtcLANServer.LANServerSupported();
 	}
 	
 	public static final String serverLANInitializeServer(String relay) {
+		rtcLANServer.initializeServer();
+		if(!serverLANinit) {
+			serverLANinit = true;
+			rtcLANServer.setDescriptionHandler(new EaglercraftLANServer.DescriptionHandler() {
+				@Override
+				public void call(String peerId, String candidate) {
+
+				}
+			});
+			rtcLANServer.setICECandidateHandler(new EaglercraftLANServer.ICECandidateHandler() {
+				@Override
+				public void call(String peerId, String candidate) {
+
+				}
+			});
+			rtcLANServer.setRecieveCodeHandler(new EaglercraftLANServer.CodeHandler() {
+				@Override
+				public void call(String code) {
+
+				}
+			});
+			rtcLANServer.setRemoteClientDataChannelHandler(new EaglercraftLANServer.ClientSignalHandler() {
+				@Override
+				public void call() {
+					// unused
+				}
+			});
+			rtcLANServer.setRemoteClientPacketHandler(new EaglercraftLANServer.PeerPacketHandler() {
+				@Override
+				public void call(String peerId, ArrayBuffer buffer) {
+					Uint8Array array = Uint8Array.create(buffer);
+					byte[] ret = new byte[array.getByteLength()];
+					for(int i = 0; i < ret.length; ++i) {
+						ret[i] = (byte) array.get(i);
+					}
+					serverLANPacketBuffer.add(new LANPeerPacket(peerId, ret));
+				}
+			});
+			rtcLANServer.setRemoteClientDisconnectHandler(new EaglercraftLANServer.ClientSignalHandler() {
+				@Override
+				public void call() {
+					// disconnected
+				}
+			});
+		}
+		// todo: java-side: register in relay & return code!!
 		return null;
 	}
 	
@@ -2987,7 +3079,8 @@ public class EaglerAdapterImpl2 {
 	}
 
 	public static final void serverLANCloseServer() {
-		
+		rtcLANServer.signalRemoteDisconnect("");
+		// todo: java-side: disconnect from relay server
 	}
 	
 	public static interface LANConnectionEvent {
@@ -3022,15 +3115,17 @@ public class EaglerAdapterImpl2 {
 	}
 	
 	public static final LANPeerPacket serverLANReadPacket() {
-		return null;
+		return serverLANPacketBuffer.size() > 0 ? serverLANPacketBuffer.remove(0) : null;
 	}
 
 	public static final void serverLANWritePacket(String peer, byte[] data) {
-		
+		ArrayBuffer arr = ArrayBuffer.create(data.length);
+		Uint8Array.create(arr).set(data);
+		rtcLANServer.sendPacketToRemoteClient(peer, arr);
 	}
 	
 	public static final void serverLANDisconnectPeer(String peer) {
-		
+		rtcLANServer.signalRemoteDisconnect(peer);
 	}
 	
 }

src/teavm/java/net/lax1dude/eaglercraft/adapter/teavm/EaglercraftLANClient.java

@@ -38,6 +38,8 @@ public interface EaglercraftLANClient extends JSObject {
 	
 	void signalRemoteICECandidate(String candidate);
 
+	void signalRemoteDisconnect();
+
 	@JSFunctor
 	public static interface ICECandidateHandler extends JSObject {
 		void call(String candidate);
@@ -45,7 +47,7 @@ public interface EaglercraftLANClient extends JSObject {
 	
 	@JSFunctor
 	public static interface DescriptionHandler extends JSObject {
-		void call(String candidate);
+		void call(String description);
 	}
 	
 	@JSFunctor

src/teavm/java/net/lax1dude/eaglercraft/adapter/teavm/EaglercraftLANServer.java

@@ -6,6 +6,10 @@ import org.teavm.jso.typedarrays.ArrayBuffer;
 
 public interface EaglercraftLANServer extends JSObject {
 
+	final int PEERSTATE_FAILED = 0;
+	final int PEERSTATE_SUCCESS = 1;
+	final int PEERSTATE_LOADING = 2;
+	
 	boolean LANServerSupported();
 	
 	void initializeServer();
@@ -24,7 +28,19 @@ public interface EaglercraftLANServer extends JSObject {
 	
 	void setRemoteClientPacketHandler(PeerPacketHandler cb);
 	
-	void ssendPacketToRemoteClient(String peerId, ArrayBuffer buffer);
+	void sendPacketToRemoteClient(String peerId, ArrayBuffer buffer);
+
+	void resetPeerStates();
+
+	int getPeerState();
+
+	int getPeerStateConnect();
+
+	int getPeerStateInitial();
+
+	int getPeerStateDesc();
+
+	int getPeerStateIce();
 	
 	void signalRemoteConnect(String peerId);
 	
@@ -32,7 +48,7 @@ public interface EaglercraftLANServer extends JSObject {
 	
 	void signalRemoteICECandidate(String peerId, String candidate);
 	
-	void disconnectRemotePeer(String peerId);
+	void signalRemoteDisconnect(String peerId);
 
 	@JSFunctor
 	public static interface ICECandidateHandler extends JSObject {