Adapted for Minecraft 1.12.2

Author: TheAndrey

.editorconfig

@@ -22,9 +22,9 @@ ij_java_space_before_synchronized_parentheses = true
 ij_java_space_after_type_cast = true
 ij_java_spaces_within_array_initializer_braces = true
 ij_java_space_before_array_initializer_left_brace = true
-ij_java_class_brace_style = next_line
-ij_java_method_brace_style = next_line
-ij_java_block_brace_style = next_line
+ij_java_class_brace_style = end_of_line
+ij_java_method_brace_style = end_of_line
+ij_java_block_brace_style = end_of_line
 ij_java_else_on_new_line = true
 ij_java_imports_layout = unset
 ij_java_class_count_to_use_import_on_demand = 10

build.gradle

@@ -7,26 +7,31 @@ buildscript {
 		}
 	}
 	dependencies {
-		classpath('com.anatawa12.forge:ForgeGradle:1.2-1.1.+') {
+		classpath('com.anatawa12.forge:ForgeGradle:2.3-1.0.+') {
 			changing = true
 		}
 	}
 }
 
-apply plugin: 'forge'
+apply plugin: 'net.minecraftforge.gradle.forge'
 
 tasks.withType(JavaCompile).configureEach {
 	options.encoding = 'UTF-8'
 }
 
 minecraft {
-	version = "1.7.10-10.13.4.1614-1.7.10"
+	version = '1.12.2-14.23.5.2847' // Max forge for FG v2.3
+	mappings = 'stable_39'
 	runDir = "run"
+	makeObfSourceJar = false
 
 	replace '@VERSION@', project.mod_version
 	replaceIn 'CoreMod.java'
+
 }
 
+// Project settings
+sourceCompatibility = targetCompatibility = JavaVersion.VERSION_1_8
 version = minecraft.version + '-' + project.mod_version
 
 jar {

gradle.properties

@@ -1,4 +1,4 @@
 # Project
 group=com.gamerforea
-mod_version=1.1
+mod_version=1.0
 core_mod_class=com.gamerforea.packetunlimiter.CoreMod

src/main/java/com/gamerforea/packetunlimiter/CoreMod.java

@@ -3,10 +3,10 @@
 import java.io.File;
 import java.util.Map;
 
-import cpw.mods.fml.relauncher.IFMLLoadingPlugin;
 import net.minecraftforge.common.config.Configuration;
+import net.minecraftforge.fml.relauncher.IFMLLoadingPlugin;
 
-@IFMLLoadingPlugin.MCVersion("1.7.10")
+@IFMLLoadingPlugin.MCVersion("1.12.2")
 @IFMLLoadingPlugin.Name(CoreMod.NAME)
 @IFMLLoadingPlugin.SortingIndex(1001)
 public final class CoreMod implements IFMLLoadingPlugin
@@ -18,17 +18,13 @@ public final class CoreMod implements IFMLLoadingPlugin
 	public static boolean isObfuscated = false;
 	public static boolean bigPacketWarning = true;
 	public static boolean readNbtLimit = false;
-	public static boolean writeNbtLimit = false;
-	public static boolean unpackNbtLimit = false;
 
 	public CoreMod()
 	{
 		Configuration config = new Configuration(new File("config", NAME + ".cfg"));
 		config.load();
 		bigPacketWarning = config.getBoolean("bigPacketWarning", "general", bigPacketWarning, "Включить оповещение при превышении стандартного лимита (2 MB)");
 		readNbtLimit = config.getBoolean("readNbtLimit", "general", readNbtLimit, "Включить ограничение чтения NBT");
-		writeNbtLimit = config.getBoolean("writeNbtLimit", "general", writeNbtLimit, "Включить ограничение записи NBT");
-		unpackNbtLimit = config.getBoolean("unpackNbtLimit", "general", unpackNbtLimit, "Включить ограничение распаковки NBT");
 		config.save();
 	}
 

src/main/java/com/gamerforea/packetunlimiter/ModContainer.java

@@ -6,9 +6,9 @@
 
 import com.google.common.eventbus.EventBus;
 
-import cpw.mods.fml.common.DummyModContainer;
-import cpw.mods.fml.common.LoadController;
-import cpw.mods.fml.common.ModMetadata;
+import net.minecraftforge.fml.common.DummyModContainer;
+import net.minecraftforge.fml.common.LoadController;
+import net.minecraftforge.fml.common.ModMetadata;
 
 public final class ModContainer extends DummyModContainer
 {

src/main/java/com/gamerforea/packetunlimiter/asm/ASMHelper.java

@@ -1,64 +1,70 @@
 package com.gamerforea.packetunlimiter.asm;
 
+import net.minecraftforge.fml.relauncher.FMLRelaunchLog;
 import org.objectweb.asm.ClassReader;
 import org.objectweb.asm.ClassWriter;
 import org.objectweb.asm.Opcodes;
+import org.objectweb.asm.tree.AbstractInsnNode;
 import org.objectweb.asm.tree.ClassNode;
-import org.objectweb.asm.tree.InsnList;
-import org.objectweb.asm.tree.InsnNode;
+import org.objectweb.asm.tree.LdcInsnNode;
 import org.objectweb.asm.tree.MethodInsnNode;
 import org.objectweb.asm.tree.MethodNode;
-import org.objectweb.asm.tree.VarInsnNode;
 
 import com.gamerforea.packetunlimiter.CoreMod;
 
 import net.minecraft.launchwrapper.IClassTransformer;
+import java.util.ListIterator;
 
-public final class ASMTransformer implements IClassTransformer, Opcodes
-{
+public final class ASMTransformer implements IClassTransformer, Opcodes {
 	@Override
-	public byte[] transform(String name, String transformedName, byte[] basicClass)
-	{
+	public byte[] transform(String name, String transformedName, byte[] basicClass) {
 		if (transformedName.equals("net.minecraft.network.PacketBuffer"))
 			return patchPacketBuffer(basicClass);
 
 		return basicClass;
 	}
 
-	private static byte[] patchPacketBuffer(byte[] basicClass)
-	{
+	private static byte[] patchPacketBuffer(byte[] basicClass) {
+		boolean patched = false;
+		String readNbt = CoreMod.isObfuscated ? "func_150793_b" : "readCompoundTag";
+
 		ClassNode cNode = new ClassNode();
 		new ClassReader(basicClass).accept(cNode, 0);
 
-		String writeNbt = ASMHelper.getMethod("net.minecraft.network.PacketBuffer.writeNBTTagCompoundToBuffer");
-		String readNbt = ASMHelper.getMethod("net.minecraft.network.PacketBuffer.readNBTTagCompoundFromBuffer");
 		for (MethodNode mNode : cNode.methods)
-			if (mNode.name.equals(writeNbt) && mNode.desc.equals("(Lnet/minecraft/nbt/NBTTagCompound;)V"))
-			{
-				if (CoreMod.writeNbtLimit)
-					continue;
-
-				InsnList insn = new InsnList();
-				insn.add(new VarInsnNode(ALOAD, 0));
-				insn.add(new VarInsnNode(ALOAD, 1));
-				insn.add(new MethodInsnNode(INVOKESTATIC, "com/gamerforea/packetunlimiter/asm/PacketBufferPatch", "writeNBTTagCompoundToBuffer", "(Lnet/minecraft/network/PacketBuffer;Lnet/minecraft/nbt/NBTTagCompound;)V", false));
-				insn.add(new InsnNode(RETURN));
-				mNode.instructions = insn;
-			}
-			else if (mNode.name.equals(readNbt) && mNode.desc.equals("()Lnet/minecraft/nbt/NBTTagCompound;"))
-			{
+			if (mNode.name.equals(readNbt) && mNode.desc.equals("()Lnet/minecraft/nbt/NBTTagCompound;")) {
 				if (CoreMod.readNbtLimit)
 					continue;
 
-				InsnList insn = new InsnList();
-				insn.add(new VarInsnNode(ALOAD, 0));
-				insn.add(new MethodInsnNode(INVOKESTATIC, "com/gamerforea/packetunlimiter/asm/PacketBufferPatch", "readNBTTagCompoundFromBuffer", "(Lnet/minecraft/network/PacketBuffer;)Lnet/minecraft/nbt/NBTTagCompound;", false));
-				insn.add(new InsnNode(ARETURN));
-				mNode.instructions = insn;
+				ListIterator<AbstractInsnNode> it = mNode.instructions.iterator();
+				while (it.hasNext()) {
+					AbstractInsnNode insn = it.next();
+
+					if (insn.getType() == AbstractInsnNode.LDC_INSN) {
+						LdcInsnNode ldcNode = (LdcInsnNode) insn;
+						AbstractInsnNode next = insn.getNext();
+
+						if (next.getType() == AbstractInsnNode.METHOD_INSN) {
+							MethodInsnNode methodNode = (MethodInsnNode) next;
+
+							if ("net/minecraft/nbt/NBTSizeTracker".equals(methodNode.owner)) {
+								ldcNode.cst = Long.MAX_VALUE;
+								patched = true;
+								break;
+							}
+						}
+					}
+				}
 			}
 
-		ClassWriter cWriter = new ClassWriter(ClassWriter.COMPUTE_MAXS);
-		cNode.accept(cWriter);
-		return cWriter.toByteArray();
+		if (patched) {
+			FMLRelaunchLog.info("[PacketUnlimiter] PacketBuffer successfully patched!");
+
+			ClassWriter cWriter = new ClassWriter(0);
+			cNode.accept(cWriter);
+			return cWriter.toByteArray();
+		}
+
+		return basicClass;
 	}
 }