BauSystem_Main/src/de/steamwar/bausystem/features/other/NoClipCommand.java

@@ -19,23 +19,20 @@
 
 package de.steamwar.bausystem.features.other;
 
-import com.comphenix.protocol.PacketType;
-import com.comphenix.protocol.ProtocolLibrary;
-import com.comphenix.protocol.events.PacketAdapter;
-import com.comphenix.protocol.events.PacketContainer;
-import com.comphenix.protocol.events.PacketEvent;
 import com.comphenix.protocol.wrappers.EnumWrappers;
 import com.comphenix.protocol.wrappers.PlayerInfoData;
 import com.comphenix.protocol.wrappers.WrappedChatComponent;
 import com.comphenix.protocol.wrappers.WrappedGameProfile;
+import com.comphenix.tinyprotocol.Reflection;
 import de.steamwar.bausystem.BauSystem;
 import de.steamwar.bausystem.features.tpslimit.TPSUtils;
 import de.steamwar.bausystem.linkage.LinkageType;
 import de.steamwar.bausystem.linkage.Linked;
+import de.steamwar.bausystem.utils.ProtocolAPI;
 import de.steamwar.command.SWCommand;
 import de.steamwar.core.VersionedRunnable;
 import lombok.Getter;
-import org.bukkit.Bukkit;
+import net.minecraft.server.v1_15_R1.PacketPlayOutPlayerInfo;
 import org.bukkit.GameMode;
 import org.bukkit.craftbukkit.v1_15_R1.entity.CraftPlayer;
 import org.bukkit.entity.Player;
@@ -46,42 +43,59 @@ import org.bukkit.event.player.PlayerGameModeChangeEvent;
 import org.bukkit.event.player.PlayerTeleportEvent;
 import org.bukkit.event.player.PlayerToggleFlightEvent;
 
-import java.lang.reflect.InvocationTargetException;
 import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
-import java.util.logging.Level;
+import java.util.function.BiFunction;
 
 @Linked(LinkageType.COMMAND)
 @Linked(LinkageType.LISTENER)
 public class NoClipCommand extends SWCommand implements Listener {
 
+    public static final Class<?> playerInfo = Reflection.getClass("{nms}.PacketPlayOutPlayerInfo");
+    private static final Reflection.FieldAccessor<PacketPlayOutPlayerInfo.EnumPlayerInfoAction> playerInfoAction = Reflection.getField(playerInfo, PacketPlayOutPlayerInfo.EnumPlayerInfoAction.class, 0);
+    private static final Reflection.FieldAccessor playerInfoDataList = Reflection.getField(playerInfo, "b", List.class);
+
+    public static final Class<?> gameStateChange = Reflection.getClass("{nms}.PacketPlayOutGameStateChange");
+    private static final Reflection.FieldAccessor<Integer> integerFieldAccessor = Reflection.getField(gameStateChange, int.class, 0);
+    private static final Reflection.FieldAccessor<Float> floatFieldAccessor = Reflection.getField(gameStateChange, float.class, 0);
+
+    public static final Class<?> position = Reflection.getClass("{nms}.PacketPlayInFlying$PacketPlayInPosition");
+    public static final Class<?> positionLook = Reflection.getClass("{nms}.PacketPlayInFlying$PacketPlayInPositionLook");
+    public static final Class<?> useItem = Reflection.getClass("{nms}.PacketPlayInUseItem");
+    public static final Class<?> blockDig = Reflection.getClass("{nms}.PacketPlayInBlockDig");
+    public static final Class<?> windowClick = Reflection.getClass("{nms}.PacketPlayInWindowClick");
+
     @Getter
     private static final List<Player> NOCLIPS = new ArrayList<>();
     private static final Map<Player, Long> LAST_TICKS = new HashMap<>();
 
     protected NoClipCommand() {
         super("noclip", "nc");
-        ProtocolLibrary.getProtocolManager().addPacketListener(new PacketAdapter(BauSystem.getInstance(), PacketType.Play.Client.POSITION, PacketType.Play.Client.POSITION_LOOK) {
-            @Override
-            public void onPacketReceiving(PacketEvent event) {
-                if (NOCLIPS.contains(event.getPlayer())) {
-                    if (LAST_TICKS.getOrDefault(event.getPlayer(), -1L).equals(TPSUtils.currentTick.get())) return;
-                    VersionedRunnable.call(new VersionedRunnable(() -> NoClipCommand_15.setGameModeInternal(event.getPlayer(), GameMode.SPECTATOR), 15));
-                    LAST_TICKS.put(event.getPlayer(), TPSUtils.currentTick.get());
-                }
+
+        BiFunction<Player, Object, Object> first = (player, o) -> {
+            if (NOCLIPS.contains(player)) {
+                if (LAST_TICKS.getOrDefault(player, -1L).equals(TPSUtils.currentTick.get())) return o;
+                VersionedRunnable.call(new VersionedRunnable(() -> NoClipCommand_15.setGameModeInternal(player, GameMode.SPECTATOR), 15));
+                LAST_TICKS.put(player, TPSUtils.currentTick.get());
             }
-        });
-        ProtocolLibrary.getProtocolManager().addPacketListener(new PacketAdapter(BauSystem.getInstance(), PacketType.Play.Client.USE_ITEM, PacketType.Play.Client.BLOCK_DIG, PacketType.Play.Client.WINDOW_CLICK) {
-            @Override
-            public void onPacketReceiving(PacketEvent event) {
-                if (NOCLIPS.contains(event.getPlayer())) {
-                    VersionedRunnable.call(new VersionedRunnable(() -> NoClipCommand_15.setGameModeInternal(event.getPlayer(), GameMode.CREATIVE), 15));
-                    LAST_TICKS.put(event.getPlayer(), TPSUtils.currentTick.get());
-                }
+            return o;
+        };
+        ProtocolAPI.setIncomingHandler(position, first);
+        ProtocolAPI.setIncomingHandler(positionLook, first);
+
+        BiFunction<Player, Object, Object> second = (player, o) -> {
+            if (NOCLIPS.contains(player)) {
+                if (LAST_TICKS.getOrDefault(player, -1L).equals(TPSUtils.currentTick.get())) return o;
+                VersionedRunnable.call(new VersionedRunnable(() -> NoClipCommand_15.setGameModeInternal(player, GameMode.SPECTATOR), 15));
+                LAST_TICKS.put(player, TPSUtils.currentTick.get());
             }
-        });
+            return o;
+        };
+        ProtocolAPI.setIncomingHandler(useItem, second);
+        ProtocolAPI.setIncomingHandler(blockDig, second);
+        ProtocolAPI.setIncomingHandler(windowClick, second);
     }
 
     @Register(help = true)
@@ -93,23 +107,21 @@ public class NoClipCommand extends SWCommand implements Listener {
             player.setGameMode(GameMode.SPECTATOR);
             ((CraftPlayer) player).getHandle().abilities.mayBuild = true;
             ((CraftPlayer) player).getHandle().abilities.canInstantlyBuild = true;
-            PacketContainer gm3packet = ProtocolLibrary.getProtocolManager().createPacket(PacketType.Play.Server.PLAYER_INFO);
-            gm3packet.getPlayerInfoAction().write(0, EnumWrappers.PlayerInfoAction.UPDATE_GAME_MODE);
+
+            Object playerInfoObject = Reflection.newInstance(playerInfo);
+            playerInfoAction.set(playerInfoObject, PacketPlayOutPlayerInfo.EnumPlayerInfoAction.UPDATE_GAME_MODE);
             List<PlayerInfoData> playerInfoActions = new ArrayList<>();
             playerInfoActions.add(new PlayerInfoData(WrappedGameProfile.fromPlayer(player), 1, EnumWrappers.NativeGameMode.SPECTATOR, WrappedChatComponent.fromText(player.getDisplayName())));
-            gm3packet.getPlayerInfoDataLists().write(0, playerInfoActions);
-            PacketContainer gm1packet = ProtocolLibrary.getProtocolManager().createPacket(PacketType.Play.Server.GAME_STATE_CHANGE);
-            gm1packet.getIntegers().write(0, 3);
-            gm1packet.getFloat().write(0, 1F);
+            playerInfoDataList.set(playerInfoObject, playerInfoActions);
+
+            Object gameStateChangeObject = Reflection.newInstance(gameStateChange);
+            integerFieldAccessor.set(gameStateChangeObject, 3);
+            floatFieldAccessor.set(gameStateChangeObject, 1F);
+            
             NOCLIPS.add(player);
             BauSystem.MESSAGE.send("OTHER_NOCLIP_SLOT_INFO", player);
-            try {
-                ProtocolLibrary.getProtocolManager().sendServerPacket(player, gm1packet);
-                ProtocolLibrary.getProtocolManager().sendServerPacket(player, gm3packet);
-            } catch (InvocationTargetException e) {
-                Bukkit.getLogger().log(Level.SEVERE, "Invocation target exception", e);
-                player.performCommand("noclip");
-            }
+            ProtocolAPI.tinyProtocol.sendPacket(player, gameStateChangeObject);
+            ProtocolAPI.tinyProtocol.sendPacket(player, playerInfoObject);
         }
     }
 

BauSystem_Main/src/de/steamwar/bausystem/utils/ProtocolAPI.java

@@ -0,0 +1,140 @@
+/*
+ * This file is a part of the SteamWar software.
+ *
+ * Copyright (C) 2021  SteamWar.de-Serverteam
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package de.steamwar.bausystem.utils;
+
+import com.comphenix.tinyprotocol.TinyProtocol;
+import de.steamwar.bausystem.BauSystem;
+import io.netty.channel.Channel;
+import lombok.experimental.UtilityClass;
+import org.bukkit.Bukkit;
+import org.bukkit.entity.Player;
+
+import java.lang.reflect.Array;
+import java.lang.reflect.Field;
+import java.lang.reflect.Modifier;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.function.BiConsumer;
+import java.util.function.BiFunction;
+import java.util.function.UnaryOperator;
+
+@UtilityClass
+public class ProtocolAPI {
+
+    private static final Map<Class<?>, BiFunction<Player, Object, Object>> outgoingHandler = new HashMap<>();
+    private static final Map<Class<?>, BiFunction<Player, Object, Object>> incomingHandler = new HashMap<>();
+
+    public static final TinyProtocol tinyProtocol = new TinyProtocol(BauSystem.getInstance()) {
+        @Override
+        public Object onPacketOutAsync(Player receiver, Channel channel, Object packet) {
+            BiFunction<Player, Object, Object> handler = outgoingHandler.get(packet.getClass());
+            if (handler == null)
+                return packet;
+            return handler.apply(receiver, packet);
+        }
+
+        @Override
+        public Object onPacketInAsync(Player sender, Channel channel, Object packet) {
+            BiFunction<Player, Object, Object> handler = incomingHandler.get(packet.getClass());
+            if (handler == null)
+                return packet;
+            return handler.apply(sender, packet);
+        }
+    };
+
+    public static void setOutgoingHandler(Class<?> packetClass, BiFunction<Player, Object, Object> handler) {
+        outgoingHandler.put(packetClass, handler);
+    }
+
+    public static void removeOutgoingHandler(Class<?> packetClass) {
+        outgoingHandler.remove(packetClass);
+    }
+
+    public static void setIncomingHandler(Class<?> packetClass, BiFunction<Player, Object, Object> handler) {
+        incomingHandler.put(packetClass, handler);
+    }
+
+    public static void removeIncomingHandler(Class<?> packetClass) {
+        incomingHandler.remove(packetClass);
+    }
+
+    public static void broadcastPacket(Object packet) {
+        Bukkit.getOnlinePlayers().stream().map(tinyProtocol::getChannel).filter(tinyProtocol::hasInjected).forEach(channel -> tinyProtocol.sendPacket(channel, packet));
+    }
+
+    public static BiFunction<Object, UnaryOperator<Object>, Object> arrayCloneGenerator(Class<?> elementClass) {
+        return (array, worker) -> {
+            int length = Array.getLength(array);
+            Object result = Array.newInstance(elementClass, length);
+
+            for (int i = 0; i < length; i++)
+                Array.set(result, i, worker.apply(Array.get(array, i)));
+
+            return result;
+        };
+    }
+
+    public static UnaryOperator<Object> shallowCloneGenerator(Class<?> clazz) {
+        BiConsumer<Object, Object> filler = shallowFill(clazz);
+
+        return source -> {
+            Object clone;
+            try {
+                clone = clazz.newInstance();
+            } catch (InstantiationException | IllegalAccessException e) {
+                throw new IllegalStateException("Could not clone " + clazz.getName(), e);
+            }
+            filler.accept(source, clone);
+            return clone;
+        };
+    }
+
+    private static BiConsumer<Object, Object> shallowFill(Class<?> clazz) {
+        if (clazz == null)
+            return (source, clone) -> {
+            };
+
+        BiConsumer<Object, Object> superFiller = shallowFill(clazz.getSuperclass());
+
+        Field[] fds = clazz.getDeclaredFields();
+        List<Field> fields = new ArrayList<>();
+        for (Field field : fds) {
+            if (Modifier.isStatic(field.getModifiers()))
+                continue;
+
+            field.setAccessible(true);
+            fields.add(field);
+        }
+
+        return (source, clone) -> {
+            superFiller.accept(source, clone);
+            try {
+                for (Field field : fields) {
+                    field.set(clone, field.get(source));
+                }
+            } catch (IllegalAccessException e) {
+                throw new IllegalStateException("Could not set field", e);
+            }
+
+        };
+    }
+}