87 Zeilen
3.7 KiB
Java
87 Zeilen
3.7 KiB
Java
package de.steamwar.listener;
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import io.netty.buffer.ByteBuf;
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import net.md_5.bungee.api.connection.PendingConnection;
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import net.md_5.bungee.api.event.PreLoginEvent;
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import net.md_5.bungee.api.plugin.Listener;
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import net.md_5.bungee.connection.InitialHandler;
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import net.md_5.bungee.event.EventHandler;
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import net.md_5.bungee.protocol.Protocol;
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import net.md_5.bungee.protocol.ProtocolConstants;
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import net.md_5.bungee.protocol.packet.Handshake;
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import java.lang.reflect.Array;
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import java.lang.reflect.Field;
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import java.lang.reflect.Method;
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import java.util.Arrays;
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import java.util.function.Supplier;
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public class TestListener implements Listener {
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private Field handShakeField;
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private static class SteamwarHandshake extends Handshake {
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public void read(ByteBuf buf) {
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System.out.println("read");
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setProtocolVersion(readVarInt(buf));
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setHost(readString(buf));
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setPort(buf.readUnsignedShort());
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setRequestedProtocol(readVarInt(buf));
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}
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}
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{
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try {
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Method mapMethod = Protocol.class.getDeclaredMethod("map", int.class, int.class);
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mapMethod.setAccessible(true);
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Object protocolMapping = mapMethod.invoke(null, ProtocolConstants.MINECRAFT_1_8, 0x00);
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Class<?> directionDataClazz = Class.forName("net.md_5.bungee.protocol.Protocol$DirectionData");
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Class<?> protocolMappingClazz = Class.forName("net.md_5.bungee.protocol.Protocol$ProtocolMapping");
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Field field = Protocol.class.getDeclaredField("TO_SERVER");
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field.setAccessible(true);
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Object o = field.get(Protocol.HANDSHAKE);
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Method method = Arrays.stream(directionDataClazz.getDeclaredMethods())
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.filter(m -> m.getName().equals("registerPacket"))
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.filter(m -> m.getParameterCount() == 3)
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.filter(m -> m.getParameterTypes()[0] == Class.class)
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.filter(m -> m.getParameterTypes()[1] == Supplier.class)
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.filter(m -> m.getParameterTypes()[2].isArray())
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.findFirst()
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.orElseThrow(() -> new RuntimeException("Could not find registerPacket method"));
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method.setAccessible(true);
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Object protocolMappingArray = Array.newInstance(protocolMappingClazz, 1);
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Array.set(protocolMappingArray, 0, protocolMapping);
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method.invoke(o, Handshake.class, new Supplier<Handshake>() {
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@Override
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public Handshake get() {
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return new SteamwarHandshake();
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}
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}, protocolMappingArray);
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handShakeField = InitialHandler.class.getDeclaredField("handshake");
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handShakeField.setAccessible(true);
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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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@EventHandler
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public void preLoginEvent(PreLoginEvent preLoginEvent) {
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PendingConnection pendingConnection = preLoginEvent.getConnection();
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System.out.println("PreLoginEvent " + preLoginEvent);
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String address = preLoginEvent.getConnection().getSocketAddress().toString();
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if (address.startsWith("/78.31.71.136:")) {
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SteamwarHandshake handshake;
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try {
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handshake = (SteamwarHandshake) handShakeField.get(pendingConnection);
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} catch (IllegalAccessException e) {
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e.printStackTrace();
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return;
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}
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System.out.println(Arrays.toString(handshake.getHost().split("\0")));
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// 0: host, 1: address, 2: uuid, (3): mojangProfile (properties, so skin data)
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preLoginEvent.getConnection().setOnlineMode(false);
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}
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}
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}
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