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Anuken
426
core/src/mindustry/net/ArcNetProvider.java
Normal file
426
core/src/mindustry/net/ArcNetProvider.java
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package mindustry.net;
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import arc.*;
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import arc.struct.*;
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import arc.func.*;
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import arc.net.*;
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import arc.net.FrameworkMessage.*;
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import arc.util.*;
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import arc.util.async.*;
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import arc.util.pooling.*;
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import mindustry.net.Net.*;
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import mindustry.net.Packets.*;
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import java.io.*;
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import java.net.*;
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import java.nio.*;
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import java.nio.channels.*;
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import java.util.concurrent.*;
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import static mindustry.Vars.*;
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public class ArcNetProvider implements NetProvider{
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final Client client;
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final Prov<DatagramPacket> packetSupplier = () -> new DatagramPacket(new byte[256], 256);
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final Server server;
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final CopyOnWriteArrayList<ArcConnection> connections = new CopyOnWriteArrayList<>();
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Thread serverThread;
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public ArcNetProvider(){
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client = new Client(8192, 4096, new PacketSerializer());
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client.setDiscoveryPacket(packetSupplier);
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client.addListener(new NetListener(){
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@Override
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public void connected(Connection connection){
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Connect c = new Connect();
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c.addressTCP = connection.getRemoteAddressTCP().getAddress().getHostAddress();
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if(connection.getRemoteAddressTCP() != null) c.addressTCP = connection.getRemoteAddressTCP().toString();
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Core.app.post(() -> net.handleClientReceived(c));
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}
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@Override
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public void disconnected(Connection connection, DcReason reason){
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if(connection.getLastProtocolError() != null){
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netClient.setQuiet();
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}
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Disconnect c = new Disconnect();
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c.reason = reason.toString();
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Core.app.post(() -> net.handleClientReceived(c));
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}
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@Override
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public void received(Connection connection, Object object){
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if(object instanceof FrameworkMessage) return;
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Core.app.post(() -> {
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try{
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net.handleClientReceived(object);
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}catch(Exception e){
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handleException(e);
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}
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});
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}
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});
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server = new Server(4096 * 2, 4096, new PacketSerializer());
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server.setMulticast(multicastGroup, multicastPort);
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server.setDiscoveryHandler((address, handler) -> {
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ByteBuffer buffer = NetworkIO.writeServerData();
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buffer.position(0);
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handler.respond(buffer);
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});
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server.addListener(new NetListener(){
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@Override
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public void connected(Connection connection){
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String ip = connection.getRemoteAddressTCP().getAddress().getHostAddress();
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ArcConnection kn = new ArcConnection(ip, connection);
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Connect c = new Connect();
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c.addressTCP = ip;
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Log.debug("&bRecieved connection: {0}", c.addressTCP);
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connections.add(kn);
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Core.app.post(() -> net.handleServerReceived(kn, c));
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}
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@Override
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public void disconnected(Connection connection, DcReason reason){
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ArcConnection k = getByArcID(connection.getID());
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if(k == null) return;
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Disconnect c = new Disconnect();
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c.reason = reason.toString();
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Core.app.post(() -> {
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net.handleServerReceived(k, c);
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connections.remove(k);
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});
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}
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@Override
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public void received(Connection connection, Object object){
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ArcConnection k = getByArcID(connection.getID());
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if(object instanceof FrameworkMessage || k == null) return;
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Core.app.post(() -> {
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try{
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net.handleServerReceived(k, object);
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}catch(RuntimeException e){
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if(e.getCause() instanceof ValidateException){
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ValidateException v = (ValidateException)e.getCause();
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Log.err("Validation failed: {0} ({1})", v.player.name, v.getMessage());
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}else{
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e.printStackTrace();
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}
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}catch(Exception e){
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e.printStackTrace();
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}
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});
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}
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});
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}
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private static boolean isLocal(InetAddress addr){
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if(addr.isAnyLocalAddress() || addr.isLoopbackAddress()) return true;
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try{
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return NetworkInterface.getByInetAddress(addr) != null;
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}catch(Exception e){
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return false;
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}
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}
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@Override
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public void connectClient(String ip, int port, Runnable success){
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Threads.daemon(() -> {
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try{
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//just in case
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client.stop();
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Threads.daemon("Net Client", () -> {
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try{
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client.run();
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}catch(Exception e){
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if(!(e instanceof ClosedSelectorException)) handleException(e);
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}
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});
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client.connect(5000, ip, port, port);
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success.run();
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}catch(Exception e){
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handleException(e);
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}
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});
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}
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@Override
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public void disconnectClient(){
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client.close();
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}
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@Override
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public void sendClient(Object object, SendMode mode){
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try{
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if(mode == SendMode.tcp){
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client.sendTCP(object);
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}else{
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client.sendUDP(object);
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}
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//sending things can cause an under/overflow, catch it and disconnect instead of crashing
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}catch(BufferOverflowException | BufferUnderflowException e){
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net.showError(e);
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}
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Pools.free(object);
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}
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@Override
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public void pingHost(String address, int port, Cons<Host> valid, Cons<Exception> invalid){
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Threads.daemon(() -> {
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try{
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DatagramSocket socket = new DatagramSocket();
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socket.send(new DatagramPacket(new byte[]{-2, 1}, 2, InetAddress.getByName(address), port));
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socket.setSoTimeout(2000);
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DatagramPacket packet = packetSupplier.get();
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socket.receive(packet);
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ByteBuffer buffer = ByteBuffer.wrap(packet.getData());
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Host host = NetworkIO.readServerData(packet.getAddress().getHostAddress(), buffer);
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Core.app.post(() -> valid.get(host));
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}catch(Exception e){
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Core.app.post(() -> invalid.get(e));
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}
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});
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}
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@Override
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public void discoverServers(Cons<Host> callback, Runnable done){
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Array<InetAddress> foundAddresses = new Array<>();
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client.discoverHosts(port, multicastGroup, multicastPort, 3000, packet -> {
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Core.app.post(() -> {
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try{
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if(foundAddresses.contains(address -> address.equals(packet.getAddress()) || (isLocal(address) && isLocal(packet.getAddress())))){
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return;
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}
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ByteBuffer buffer = ByteBuffer.wrap(packet.getData());
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Host host = NetworkIO.readServerData(packet.getAddress().getHostAddress(), buffer);
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callback.get(host);
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foundAddresses.add(packet.getAddress());
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}catch(Exception e){
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//don't crash when there's an error pinging a a server or parsing data
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e.printStackTrace();
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}
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});
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}, () -> Core.app.post(done));
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}
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@Override
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public void dispose(){
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disconnectClient();
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closeServer();
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try{
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client.dispose();
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}catch(IOException ignored){
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}
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}
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@Override
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public Iterable<ArcConnection> getConnections(){
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return connections;
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}
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@Override
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public void hostServer(int port) throws IOException{
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connections.clear();
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server.bind(port, port);
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serverThread = new Thread(() -> {
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try{
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server.run();
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}catch(Throwable e){
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if(!(e instanceof ClosedSelectorException)) Threads.throwAppException(e);
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}
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}, "Net Server");
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serverThread.setDaemon(true);
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serverThread.start();
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}
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@Override
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public void closeServer(){
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connections.clear();
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Threads.daemon(server::stop);
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}
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ArcConnection getByArcID(int id){
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for(int i = 0; i < connections.size(); i++){
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ArcConnection con = connections.get(i);
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if(con.connection != null && con.connection.getID() == id){
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return con;
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}
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}
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return null;
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}
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private void handleException(Exception e){
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if(e instanceof ArcNetException){
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Core.app.post(() -> net.showError(new IOException("mismatch")));
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}else if(e instanceof ClosedChannelException){
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Core.app.post(() -> net.showError(new IOException("alreadyconnected")));
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}else{
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Core.app.post(() -> net.showError(e));
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}
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}
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class ArcConnection extends NetConnection{
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public final Connection connection;
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public ArcConnection(String address, Connection connection){
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super(address);
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this.connection = connection;
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}
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@Override
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public boolean isConnected(){
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return connection.isConnected();
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}
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@Override
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public void sendStream(Streamable stream){
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connection.addListener(new InputStreamSender(stream.stream, 512){
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int id;
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@Override
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protected void start(){
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//send an object so the receiving side knows how to handle the following chunks
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StreamBegin begin = new StreamBegin();
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begin.total = stream.stream.available();
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begin.type = Registrator.getID(stream.getClass());
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connection.sendTCP(begin);
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id = begin.id;
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}
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@Override
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protected Object next(byte[] bytes){
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StreamChunk chunk = new StreamChunk();
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chunk.id = id;
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chunk.data = bytes;
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return chunk; //wrap the byte[] with an object so the receiving side knows how to handle it.
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}
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});
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}
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@Override
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public void send(Object object, SendMode mode){
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try{
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if(mode == SendMode.tcp){
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connection.sendTCP(object);
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}else{
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connection.sendUDP(object);
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}
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}catch(Exception e){
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Log.err(e);
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Log.info("Error sending packet. Disconnecting invalid client!");
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connection.close(DcReason.error);
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ArcConnection k = getByArcID(connection.getID());
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if(k != null) connections.remove(k);
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}
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}
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@Override
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public void close(){
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if(connection.isConnected()) connection.close(DcReason.closed);
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}
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}
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@SuppressWarnings("unchecked")
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public static class PacketSerializer implements NetSerializer{
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static Cons2<Packet, ByteBuffer> writer = Packet::write;
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@Override
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public Object read(ByteBuffer byteBuffer){
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byte id = byteBuffer.get();
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if(id == -2){
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return readFramework(byteBuffer);
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}else{
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Packet packet = Pools.obtain((Class<Packet>)Registrator.getByID(id).type, (Prov<Packet>)Registrator.getByID(id).constructor);
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packet.read(byteBuffer);
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return packet;
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}
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}
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@Override
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public void write(ByteBuffer byteBuffer, Object o){
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if(o instanceof FrameworkMessage){
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byteBuffer.put((byte)-2); //code for framework message
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writeFramework(byteBuffer, (FrameworkMessage)o);
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}else{
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if(!(o instanceof Packet))
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throw new RuntimeException("All sent objects must implement be Packets! Class: " + o.getClass());
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byte id = Registrator.getID(o.getClass());
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if(id == -1)
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throw new RuntimeException("Unregistered class: " + o.getClass());
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byteBuffer.put(id);
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writer.get((Packet)o, byteBuffer);
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}
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}
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public void writeFramework(ByteBuffer buffer, FrameworkMessage message){
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if(message instanceof Ping){
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Ping p = (Ping)message;
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buffer.put((byte)0);
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buffer.putInt(p.id);
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buffer.put(p.isReply ? 1 : (byte)0);
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}else if(message instanceof DiscoverHost){
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buffer.put((byte)1);
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}else if(message instanceof KeepAlive){
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buffer.put((byte)2);
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}else if(message instanceof RegisterUDP){
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RegisterUDP p = (RegisterUDP)message;
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buffer.put((byte)3);
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buffer.putInt(p.connectionID);
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}else if(message instanceof RegisterTCP){
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RegisterTCP p = (RegisterTCP)message;
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buffer.put((byte)4);
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buffer.putInt(p.connectionID);
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}
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}
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public FrameworkMessage readFramework(ByteBuffer buffer){
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byte id = buffer.get();
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if(id == 0){
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Ping p = new Ping();
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p.id = buffer.getInt();
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p.isReply = buffer.get() == 1;
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return p;
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}else if(id == 1){
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return new DiscoverHost();
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}else if(id == 2){
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return new KeepAlive();
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}else if(id == 3){
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RegisterUDP p = new RegisterUDP();
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p.connectionID = buffer.getInt();
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return p;
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}else if(id == 4){
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RegisterTCP p = new RegisterTCP();
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p.connectionID = buffer.getInt();
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return p;
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}else{
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throw new RuntimeException("Unknown framework message!");
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}
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}
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}
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}
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