Mirror von
https://github.com/ViaVersion/ViaVersion.git
synchronisiert 2024-12-25 15:50:10 +01:00
Using javassist add compatibility for Spigot builds with protocol compatibility (eg. 1.9.1 & 1.9.2)
Also fix issue with protocol passthrough *whew*
Dieser Commit ist enthalten in:
Ursprung
c7ee816aba
Commit
00cc545795
@ -20,6 +20,7 @@ import us.myles.ViaVersion.api.command.ViaVersionCommand;
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import us.myles.ViaVersion.api.data.UserConnection;
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import us.myles.ViaVersion.api.protocol.ProtocolRegistry;
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import us.myles.ViaVersion.boss.ViaBossBar;
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import us.myles.ViaVersion.classgenerator.ClassGenerator;
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import us.myles.ViaVersion.commands.ViaCommandHandler;
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import us.myles.ViaVersion.handlers.ViaVersionInitializer;
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import us.myles.ViaVersion.protocols.base.ProtocolInfo;
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@ -48,6 +49,7 @@ public class ViaVersionPlugin extends JavaPlugin implements ViaVersionAPI, ViaVe
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private List<Pair<Field, Object>> injectedLists = new ArrayList<>();
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private ViaCommandHandler commandHandler;
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private boolean debug = false;
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private boolean compatSpigotBuild = false;
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@Override
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public void onLoad() {
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@ -65,8 +67,16 @@ public class ViaVersionPlugin extends JavaPlugin implements ViaVersionAPI, ViaVe
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}
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}
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// Check if it's a spigot build with a protocol mod
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try {
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compatSpigotBuild = ReflectionUtil.nms("PacketEncoder").getDeclaredField("version") != null;
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} catch (Exception e){
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compatSpigotBuild = false;
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}
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// Generate classes needed (only works if it's compat)
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ClassGenerator.generate();
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getLogger().info("ViaVersion " + getDescription().getVersion() + " is now loaded, injecting.");
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getLogger().info("ViaVersion " + getDescription().getVersion() + (compatSpigotBuild ? "compat" : "") + " is now loaded, injecting.");
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injectPacketHandler();
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}
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@ -348,6 +358,11 @@ public class ViaVersionPlugin extends JavaPlugin implements ViaVersionAPI, ViaVe
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return commandHandler;
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}
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@Override
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public boolean isCompatSpigotBuild() {
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return compatSpigotBuild;
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}
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public boolean isCheckForUpdates() {
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return getConfig().getBoolean("checkforupdates", true);
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}
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@ -174,7 +174,7 @@ public class PacketWrapper {
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readableObjects.clear();
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// If the buffer has readable bytes, copy them.
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if(inputBuffer.readableBytes() > 0){
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read(Type.REMAINING_BYTES);
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passthrough(Type.REMAINING_BYTES);
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}
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}
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@ -318,4 +318,13 @@ public class PacketWrapper {
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PipelineUtil.getContextBefore("decompress", user().getChannel().pipeline()).fireChannelRead(output);
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}
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}
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@Override
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public String toString() {
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return "PacketWrapper{" +
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"packetValues=" + packetValues +
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", readableObjects=" + readableObjects +
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", id=" + id +
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'}';
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}
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}
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@ -101,4 +101,12 @@ public interface ViaVersionAPI {
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* @return command handler
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*/
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ViaVersionCommand getCommandHandler();
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/**
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* Get if this version is a compatibility build for spigot.
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* Eg. 1.9.1 / 1.9.2 allow certain versions to connect
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*
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* @return True if it is
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*/
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boolean isCompatSpigotBuild();
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}
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@ -1,12 +1,9 @@
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package us.myles.ViaVersion.api.data;
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import com.google.gson.Gson;
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import io.netty.buffer.ByteBuf;
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import io.netty.channel.ChannelHandler;
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import io.netty.channel.socket.SocketChannel;
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import lombok.Data;
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import lombok.Getter;
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import lombok.Setter;
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import org.bukkit.Bukkit;
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import org.bukkit.ChatColor;
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import org.bukkit.entity.Player;
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@ -0,0 +1,20 @@
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package us.myles.ViaVersion.classgenerator;
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import io.netty.handler.codec.ByteToMessageDecoder;
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import io.netty.handler.codec.MessageToByteEncoder;
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import us.myles.ViaVersion.api.data.UserConnection;
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import us.myles.ViaVersion.classgenerator.HandlerConstructor;
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import us.myles.ViaVersion.handlers.ViaDecodeHandler;
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import us.myles.ViaVersion.handlers.ViaEncodeHandler;
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public class BasicHandlerConstructor implements HandlerConstructor {
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@Override
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public ViaEncodeHandler newEncodeHandler(UserConnection info, MessageToByteEncoder minecraftEncoder) {
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return new ViaEncodeHandler(info, minecraftEncoder);
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}
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@Override
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public ViaDecodeHandler newDecodeHandler(UserConnection info, ByteToMessageDecoder minecraftDecoder) {
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return new ViaDecodeHandler(info, minecraftDecoder);
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}
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}
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88
src/main/java/us/myles/ViaVersion/classgenerator/ClassGenerator.java
Normale Datei
88
src/main/java/us/myles/ViaVersion/classgenerator/ClassGenerator.java
Normale Datei
@ -0,0 +1,88 @@
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package us.myles.ViaVersion.classgenerator;
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import javassist.*;
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import javassist.expr.ConstructorCall;
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import javassist.expr.ExprEditor;
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import us.myles.ViaVersion.api.ViaVersion;
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import us.myles.ViaVersion.handlers.ViaDecodeHandler;
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import us.myles.ViaVersion.handlers.ViaEncodeHandler;
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import us.myles.ViaVersion.util.ReflectionUtil;
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public class ClassGenerator {
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private static HandlerConstructor constructor = new BasicHandlerConstructor();
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public static HandlerConstructor getConstructor() {
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return constructor;
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}
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public static void generate() {
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if(!ViaVersion.getInstance().isCompatSpigotBuild()) return; // Use Basic Handler as not needed.
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try {
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ClassPool pool = ClassPool.getDefault();
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pool.insertClassPath(new LoaderClassPath(ClassGenerator.class.getClassLoader()));
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// Generate the classes
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transformSuperclass(pool, ViaDecodeHandler.class, ReflectionUtil.nms("PacketDecoder"));
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transformSuperclass(pool, ViaEncodeHandler.class, ReflectionUtil.nms("PacketEncoder"));
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// Implement Constructor
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CtClass generated = pool.makeClass("us.myles.ViaVersion.classgenerator.generated.GeneratedConstructor");
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CtClass handlerInterface = pool.get(HandlerConstructor.class.getName());
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generated.setInterfaces(new CtClass[]{handlerInterface});
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// Import required classes
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pool.importPackage("us.myles.ViaVersion.classgenerator.generated");
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pool.importPackage("us.myles.ViaVersion.classgenerator");
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pool.importPackage("us.myles.ViaVersion.api.data");
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pool.importPackage("io.netty.handler.codec");
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// Implement Methods
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generated.addMethod(CtMethod.make("public MessageToByteEncoder newEncodeHandler(UserConnection info, MessageToByteEncoder minecraftEncoder) {\n" +
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" return new ViaEncodeHandler(info, minecraftEncoder);\n" +
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" }", generated));
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generated.addMethod(CtMethod.make("public ByteToMessageDecoder newDecodeHandler(UserConnection info, ByteToMessageDecoder minecraftDecoder) {\n" +
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" return new ViaDecodeHandler(info, minecraftDecoder);\n" +
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" }", generated));
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constructor = (HandlerConstructor) generated.toClass(HandlerConstructor.class.getClassLoader()).newInstance();
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} catch (ClassNotFoundException e) {
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e.printStackTrace();
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} catch (CannotCompileException e) {
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e.printStackTrace();
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} catch (NotFoundException e) {
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e.printStackTrace();
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} catch (InstantiationException e) {
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e.printStackTrace();
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} catch (IllegalAccessException e) {
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e.printStackTrace();
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}
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}
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private static Class transformSuperclass(ClassPool pool, Class input, Class superclass) {
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String newName = "us.myles.ViaVersion.classgenerator.generated." + input.getSimpleName();
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try {
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CtClass toExtend = pool.get(superclass.getName());
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CtClass generated = pool.getAndRename(input.getName(), newName);
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generated.setSuperclass(toExtend);
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// Modify constructor to call super
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if(generated.getConstructors().length != 0) {
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generated.getConstructors()[0].instrument(new ExprEditor() {
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@Override
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public void edit(ConstructorCall c) throws CannotCompileException {
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if (c.isSuper()) {
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// Constructor for both has a stats thing.
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c.replace("super(null);");
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}
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super.edit(c);
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}
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});
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}
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return generated.toClass(HandlerConstructor.class.getClassLoader());
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} catch (NotFoundException e) {
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e.printStackTrace();
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} catch (CannotCompileException e) {
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e.printStackTrace();
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}
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return null;
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}
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}
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@ -0,0 +1,10 @@
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package us.myles.ViaVersion.classgenerator;
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import io.netty.handler.codec.ByteToMessageDecoder;
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import io.netty.handler.codec.MessageToByteEncoder;
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import us.myles.ViaVersion.api.data.UserConnection;
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public interface HandlerConstructor {
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public MessageToByteEncoder newEncodeHandler(UserConnection info, MessageToByteEncoder minecraftEncoder);
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public ByteToMessageDecoder newDecodeHandler(UserConnection info, ByteToMessageDecoder minecraftDecoder);
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}
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@ -4,6 +4,7 @@ import io.netty.buffer.ByteBuf;
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import io.netty.channel.ChannelHandlerContext;
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import io.netty.handler.codec.MessageToByteEncoder;
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import us.myles.ViaVersion.api.PacketWrapper;
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import us.myles.ViaVersion.api.ViaVersion;
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import us.myles.ViaVersion.api.data.UserConnection;
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import us.myles.ViaVersion.api.type.Type;
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import us.myles.ViaVersion.exception.CancelException;
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@ -11,6 +12,7 @@ import us.myles.ViaVersion.packets.Direction;
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import us.myles.ViaVersion.protocols.base.ProtocolInfo;
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import us.myles.ViaVersion.util.PipelineUtil;
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import java.lang.reflect.Field;
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import java.lang.reflect.InvocationTargetException;
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public class ViaEncodeHandler extends MessageToByteEncoder {
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@ -25,6 +27,11 @@ public class ViaEncodeHandler extends MessageToByteEncoder {
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@Override
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protected void encode(final ChannelHandlerContext ctx, Object o, final ByteBuf bytebuf) throws Exception {
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if (ViaVersion.getInstance().isCompatSpigotBuild()) {
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Field ver = minecraftEncoder.getClass().getDeclaredField("version");
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ver.setAccessible(true);
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ver.set(minecraftEncoder, ver.get(this));
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}
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// handle the packet type
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if (!(o instanceof ByteBuf)) {
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// call minecraft encoder
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@ -7,6 +7,8 @@ import io.netty.handler.codec.ByteToMessageDecoder;
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import io.netty.handler.codec.MessageToByteEncoder;
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import us.myles.ViaVersion.api.data.UserConnection;
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import us.myles.ViaVersion.api.protocol.ProtocolPipeline;
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import us.myles.ViaVersion.classgenerator.ClassGenerator;
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import us.myles.ViaVersion.classgenerator.HandlerConstructor;
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import java.lang.reflect.Method;
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@ -36,9 +38,11 @@ public class ViaVersionInitializer extends ChannelInitializer<SocketChannel> {
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new ProtocolPipeline(info);
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// Add originals
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this.method.invoke(this.original, socketChannel);
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HandlerConstructor constructor = ClassGenerator.getConstructor();
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// Add our transformers
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ViaEncodeHandler encoder = new ViaEncodeHandler(info, (MessageToByteEncoder) socketChannel.pipeline().get("encoder"));
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ViaDecodeHandler decoder = new ViaDecodeHandler(info, (ByteToMessageDecoder) socketChannel.pipeline().get("decoder"));
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MessageToByteEncoder encoder = constructor.newEncodeHandler(info, (MessageToByteEncoder) socketChannel.pipeline().get("encoder"));
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ByteToMessageDecoder decoder = constructor.newDecodeHandler(info, (ByteToMessageDecoder) socketChannel.pipeline().get("decoder"));
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ViaPacketHandler chunkHandler = new ViaPacketHandler(info);
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socketChannel.pipeline().replace("encoder", "encoder", encoder);
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