Initial commit

2023-01-04 20:58:09 +01:00 · 2023-01-04 20:58:09 +01:00 · 886fbd9c5e
parent d1acd4fb31
commit 886fbd9c5e
72 changed files with 3804 additions and 0 deletions
--- a/.gitattributes
+++ b/.gitattributes
@ -0,0 +1,9 @@
+#
+# https://help.github.com/articles/dealing-with-line-endings/
+#
+# Linux start script should use lf
+/gradlew        text eol=lf
+
+# These are Windows script files and should use crlf
+*.bat           text eol=crlf
+
--- a/.github/dependabot.yml
+++ b/.github/dependabot.yml
@ -0,0 +1,6 @@
+version: 2
+updates:
+  - package-ecosystem: "gradle"
+    directory: "/"
+    schedule:
+      interval: "daily"
--- a/.gitignore
+++ b/.gitignore
@ -0,0 +1,16 @@
+# Compiled class file
+*.class
+
+# Log file
+*.log
+*.log.gz
+
+# virtual machine crash logs, see http://www.java.com/en/download/help/error_hotspot.xml
+hs_err_pid*
+
+# Project files
+/.idea/
+/.gradle/
+/build/
+/out/
+/run/
--- a/README.md
+++ b/README.md
@ -0,0 +1,25 @@
+# ViaProxy
+Standalone proxy which uses ViaVersion to translate between minecraft versions.
+
+## Supported Server versions
+- Classic (c0.0.15 - c0.30 including [CPE](https://wiki.vg/Classic_Protocol_Extension))
+- Alpha (a1.0.15 - a1.2.6)
+- Beta (b1.0 - b1.8.1)
+- Release (1.0.0 - 1.19.3)
+- April Fools (3D Shareware, 20w14infinite)
+- Combat Snapshots (Combat Test 8c)
+
+## Supported Client versions
+- Release (1.7.2 - 1.19.3)
+- April Fools (3D Shareware)
+
+## Releases
+### Gradle/Maven
+To use ViaProxy with Gradle/Maven you can use this [Maven server](https://maven.lenni0451.net/#/releases/net/raphimc/ViaProxy) or [Jitpack](https://jitpack.io/#RaphiMC/ViaProxy).  
+You can also find instructions how to implement it into your build script there.
+
+### Jar File
+If you just want the latest jar file you can download it from this [Jenkins](https://build.lenni0451.net/job/ViaProxy/).
+
+## Usage
+TODO
--- a/build.gradle
+++ b/build.gradle
@ -0,0 +1,110 @@
+plugins {
+    id "java"
+    id "maven-publish"
+}
+
+java.toolchain.languageVersion = JavaLanguageVersion.of(8)
+compileJava.options.encoding = compileTestJava.options.encoding = javadoc.options.encoding = "UTF-8"
+
+group = project.maven_group
+archivesBaseName = project.maven_name
+version = project.maven_version
+
+configurations {
+    include
+
+    implementation.extendsFrom include
+    api.extendsFrom include
+}
+
+repositories {
+    mavenCentral()
+    maven {
+        name = "Jitpack"
+        url = "https://jitpack.io"
+    }
+    maven {
+        name = "Lenni0451"
+        url "https://maven.lenni0451.net/releases"
+    }
+    maven {
+        name = "ViaVersion"
+        url "https://repo.viaversion.com"
+    }
+}
+
+dependencies {
+    include "com.viaversion:viaversion:4.5.2-SNAPSHOT"
+    include("com.viaversion:viabackwards-common:4.5.2-SNAPSHOT") {
+        exclude group: "com.viaversion", module: "viaversion"
+        exclude group: "io.netty", module: "netty-all"
+        exclude group: "com.google.guava", module: "guava"
+    }
+    include "com.viaversion:viarewind-core:2.0.3-SNAPSHOT"
+    include "net.raphimc:ViaLegacy:2.0.3"
+    include("net.raphimc:ViaProtocolHack:2.0.1") {
+        exclude group: "org.slf4j", module: "slf4j-api"
+    }
+
+    include "com.formdev:flatlaf:3.0"
+    include "com.google.guava:guava:31.1-jre"
+    include "net.sf.jopt-simple:jopt-simple:5.0.4"
+    include "org.apache.logging.log4j:log4j-core:2.19.0"
+    include "org.apache.logging.log4j:log4j-slf4j-impl:2.19.0"
+    include "com.github.GeyserMC:MCAuthLib:1.4"
+    include "net.lenni0451.classtransform:mixinstranslator:1.7.5"
+    include "net.lenni0451.classtransform:mixinsdummy:1.7.5"
+    include "net.lenni0451.classtransform:additionalclassprovider:1.7.5"
+    include "net.lenni0451:Reflect:1.0.2"
+    include "net.lenni0451:LambdaEvents:2.0.3"
+    include "net.raphimc.netminecraft:all:2.2.2"
+}
+
+java {
+    withSourcesJar()
+}
+
+jar {
+    dependsOn configurations.include
+    from {
+        duplicatesStrategy = DuplicatesStrategy.EXCLUDE
+        configurations.include.collect {
+            zipTree(it)
+        }
+    } {
+        exclude "META-INF/*.RSA", "META-INF/*.SF", "META-INF/*.DSA"
+    }
+
+    manifest {
+        attributes(
+                "Main-Class": "net.raphimc.viaproxy.ViaProxy",
+                "Multi-Release": "true"
+        )
+    }
+
+    from("LICENSE") {
+        rename { "${it}_${project.archivesBaseName}" }
+    }
+}
+
+publishing {
+    repositories {
+        maven {
+            name = "reposilite"
+            url = "https://maven.lenni0451.net/releases"
+            credentials(PasswordCredentials)
+            authentication {
+                basic(BasicAuthentication)
+            }
+        }
+    }
+    publications {
+        maven(MavenPublication) {
+            groupId = project.maven_group
+            artifactId = project.maven_name
+            version = project.maven_version
+
+            from components.java
+        }
+    }
+}
--- a/gradle.properties
+++ b/gradle.properties
@ -0,0 +1,9 @@
+# Gradle properties
+org.gradle.daemon=true
+org.gradle.parallel=true
+org.gradle.configureondemand=true
+
+# Project properties
+maven_name=ViaProxy
+maven_group=net.raphimc
+maven_version=3.0.0
--- a/gradle/wrapper/gradle-wrapper.jar
+++ b/gradle/wrapper/gradle-wrapper.jar
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@ -0,0 +1,5 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-7.5.1-bin.zip
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
--- a/240
+++ b/240
@ -0,0 +1,240 @@
+#!/bin/sh
+
+#
+# Copyright © 2015-2021 the original authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+##############################################################################
+#
+#   Gradle start up script for POSIX generated by Gradle.
+#
+#   Important for running:
+#
+#   (1) You need a POSIX-compliant shell to run this script. If your /bin/sh is
+#       noncompliant, but you have some other compliant shell such as ksh or
+#       bash, then to run this script, type that shell name before the whole
+#       command line, like:
+#
+#           ksh Gradle
+#
+#       Busybox and similar reduced shells will NOT work, because this script
+#       requires all of these POSIX shell features:
+#         * functions;
+#         * expansions «$var», «${var}», «${var:-default}», «${var+SET}»,
+#           «${var#prefix}», «${var%suffix}», and «$( cmd )»;
+#         * compound commands having a testable exit status, especially «case»;
+#         * various built-in commands including «command», «set», and «ulimit».
+#
+#   Important for patching:
+#
+#   (2) This script targets any POSIX shell, so it avoids extensions provided
+#       by Bash, Ksh, etc; in particular arrays are avoided.
+#
+#       The "traditional" practice of packing multiple parameters into a
+#       space-separated string is a well documented source of bugs and security
+#       problems, so this is (mostly) avoided, by progressively accumulating
+#       options in "$@", and eventually passing that to Java.
+#
+#       Where the inherited environment variables (DEFAULT_JVM_OPTS, JAVA_OPTS,
+#       and GRADLE_OPTS) rely on word-splitting, this is performed explicitly;
+#       see the in-line comments for details.
+#
+#       There are tweaks for specific operating systems such as AIX, CygWin,
+#       Darwin, MinGW, and NonStop.
+#
+#   (3) This script is generated from the Groovy template
+#       https://github.com/gradle/gradle/blob/master/subprojects/plugins/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt
+#       within the Gradle project.
+#
+#       You can find Gradle at https://github.com/gradle/gradle/.
+#
+##############################################################################
+
+# Attempt to set APP_HOME
+
+# Resolve links: $0 may be a link
+app_path=$0
+
+# Need this for daisy-chained symlinks.
+while
+    APP_HOME=${app_path%"${app_path##*/}"}  # leaves a trailing /; empty if no leading path
+    [ -h "$app_path" ]
+do
+    ls=$( ls -ld "$app_path" )
+    link=${ls#*' -> '}
+    case $link in             #(
+      /*)   app_path=$link ;; #(
+      *)    app_path=$APP_HOME$link ;;
+    esac
+done
+
+APP_HOME=$( cd "${APP_HOME:-./}" && pwd -P ) || exit
+
+APP_NAME="Gradle"
+APP_BASE_NAME=${0##*/}
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD=maximum
+
+warn () {
+    echo "$*"
+} >&2
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+} >&2
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "$( uname )" in                #(
+  CYGWIN* )         cygwin=true  ;; #(
+  Darwin* )         darwin=true  ;; #(
+  MSYS* | MINGW* )  msys=true    ;; #(
+  NONSTOP* )        nonstop=true ;;
+esac
+
+CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD=$JAVA_HOME/jre/sh/java
+    else
+        JAVACMD=$JAVA_HOME/bin/java
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD=java
+    which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+fi
+
+# Increase the maximum file descriptors if we can.
+if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then
+    case $MAX_FD in #(
+      max*)
+        MAX_FD=$( ulimit -H -n ) ||
+            warn "Could not query maximum file descriptor limit"
+    esac
+    case $MAX_FD in  #(
+      '' | soft) :;; #(
+      *)
+        ulimit -n "$MAX_FD" ||
+            warn "Could not set maximum file descriptor limit to $MAX_FD"
+    esac
+fi
+
+# Collect all arguments for the java command, stacking in reverse order:
+#   * args from the command line
+#   * the main class name
+#   * -classpath
+#   * -D...appname settings
+#   * --module-path (only if needed)
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, and GRADLE_OPTS environment variables.
+
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if "$cygwin" || "$msys" ; then
+    APP_HOME=$( cygpath --path --mixed "$APP_HOME" )
+    CLASSPATH=$( cygpath --path --mixed "$CLASSPATH" )
+
+    JAVACMD=$( cygpath --unix "$JAVACMD" )
+
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    for arg do
+        if
+            case $arg in                                #(
+              -*)   false ;;                            # don't mess with options #(
+              /?*)  t=${arg#/} t=/${t%%/*}              # looks like a POSIX filepath
+                    [ -e "$t" ] ;;                      #(
+              *)    false ;;
+            esac
+        then
+            arg=$( cygpath --path --ignore --mixed "$arg" )
+        fi
+        # Roll the args list around exactly as many times as the number of
+        # args, so each arg winds up back in the position where it started, but
+        # possibly modified.
+        #
+        # NB: a `for` loop captures its iteration list before it begins, so
+        # changing the positional parameters here affects neither the number of
+        # iterations, nor the values presented in `arg`.
+        shift                   # remove old arg
+        set -- "$@" "$arg"      # push replacement arg
+    done
+fi
+
+# Collect all arguments for the java command;
+#   * $DEFAULT_JVM_OPTS, $JAVA_OPTS, and $GRADLE_OPTS can contain fragments of
+#     shell script including quotes and variable substitutions, so put them in
+#     double quotes to make sure that they get re-expanded; and
+#   * put everything else in single quotes, so that it's not re-expanded.
+
+set -- \
+        "-Dorg.gradle.appname=$APP_BASE_NAME" \
+        -classpath "$CLASSPATH" \
+        org.gradle.wrapper.GradleWrapperMain \
+        "$@"
+
+# Stop when "xargs" is not available.
+if ! command -v xargs >/dev/null 2>&1
+then
+    die "xargs is not available"
+fi
+
+# Use "xargs" to parse quoted args.
+#
+# With -n1 it outputs one arg per line, with the quotes and backslashes removed.
+#
+# In Bash we could simply go:
+#
+#   readarray ARGS < <( xargs -n1 <<<"$var" ) &&
+#   set -- "${ARGS[@]}" "$@"
+#
+# but POSIX shell has neither arrays nor command substitution, so instead we
+# post-process each arg (as a line of input to sed) to backslash-escape any
+# character that might be a shell metacharacter, then use eval to reverse
+# that process (while maintaining the separation between arguments), and wrap
+# the whole thing up as a single "set" statement.
+#
+# This will of course break if any of these variables contains a newline or
+# an unmatched quote.
+#
+
+eval "set -- $(
+        printf '%s\n' "$DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS" |
+        xargs -n1 |
+        sed ' s~[^-[:alnum:]+,./:=@_]~\\&~g; ' |
+        tr '\n' ' '
+    )" '"$@"'
+
+exec "$JAVACMD" "$@"
--- a/gradlew.bat
+++ b/gradlew.bat
@ -0,0 +1,91 @@
+@rem
+@rem Copyright 2015 the original author or authors.
+@rem
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem You may obtain a copy of the License at
+@rem
+@rem      https://www.apache.org/licenses/LICENSE-2.0
+@rem
+@rem Unless required by applicable law or agreed to in writing, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+@rem
+
+@if "%DEBUG%"=="" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%"=="" set DIRNAME=.
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Resolve any "." and ".." in APP_HOME to make it shorter.
+for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if %ERRORLEVEL% equ 0 goto execute
+
+echo.
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto execute
+
+echo.
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
+
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %*
+
+:end
+@rem End local scope for the variables with windows NT shell
+if %ERRORLEVEL% equ 0 goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+set EXIT_CODE=%ERRORLEVEL%
+if %EXIT_CODE% equ 0 set EXIT_CODE=1
+if not ""=="%GRADLE_EXIT_CONSOLE%" exit %EXIT_CODE%
+exit /b %EXIT_CODE%
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega
--- a/settings.gradle
+++ b/settings.gradle
@ -0,0 +1,8 @@
+pluginManagement {
+    repositories {
+        mavenCentral()
+        gradlePluginPortal()
+    }
+}
+
+rootProject.name = "ViaProxy"
--- a/src/main/java/net/raphimc/viaproxy/ViaProxy.java
+++ b/src/main/java/net/raphimc/viaproxy/ViaProxy.java
@ -0,0 +1,114 @@
+package net.raphimc.viaproxy;
+
+import io.netty.channel.Channel;
+import io.netty.channel.group.ChannelGroup;
+import io.netty.channel.group.DefaultChannelGroup;
+import io.netty.util.ResourceLeakDetector;
+import io.netty.util.concurrent.GlobalEventExecutor;
+import net.lenni0451.classtransform.TransformerManager;
+import net.lenni0451.classtransform.additionalclassprovider.GuavaClassPathProvider;
+import net.lenni0451.classtransform.mixinstranslator.MixinsTranslator;
+import net.lenni0451.classtransform.utils.loader.EnumLoaderPriority;
+import net.lenni0451.classtransform.utils.loader.InjectionClassLoader;
+import net.lenni0451.reflect.ClassLoaders;
+import net.raphimc.netminecraft.constants.MCPipeline;
+import net.raphimc.netminecraft.netty.connection.NetServer;
+import net.raphimc.viaproxy.cli.ConsoleHandler;
+import net.raphimc.viaproxy.cli.options.Options;
+import net.raphimc.viaproxy.plugins.PluginManager;
+import net.raphimc.viaproxy.protocolhack.ProtocolHack;
+import net.raphimc.viaproxy.proxy.ProxyConnection;
+import net.raphimc.viaproxy.proxy.client2proxy.Client2ProxyChannelInitializer;
+import net.raphimc.viaproxy.proxy.client2proxy.Client2ProxyHandler;
+import net.raphimc.viaproxy.ui.ViaProxyUI;
+import net.raphimc.viaproxy.util.logging.Logger;
+
+import javax.swing.*;
+import java.awt.*;
+
+public class ViaProxy {
+
+    public static NetServer currentProxyServer;
+    public static Thread loaderThread;
+    public static ChannelGroup c2pChannels;
+
+    public static void main(String[] args) throws Throwable {
+        final TransformerManager transformerManager = new TransformerManager(new GuavaClassPathProvider());
+        transformerManager.addTransformerPreprocessor(new MixinsTranslator());
+        transformerManager.addTransformer("net.raphimc.viaproxy.injection.transformer.**");
+        transformerManager.addTransformer("net.raphimc.viaproxy.injection.mixins.**");
+        final InjectionClassLoader injectionClassLoader = new InjectionClassLoader(transformerManager, ClassLoaders.getSystemClassPath());
+        injectionClassLoader.setPriority(EnumLoaderPriority.PARENT_FIRST);
+        injectionClassLoader.executeMain(ViaProxy.class.getName(), "injectedMain", args);
+    }
+
+    public static void injectedMain(String[] args) throws InterruptedException {
+        Logger.setup();
+        ConsoleHandler.hookConsole();
+        Logger.LOGGER.info("Initializing ViaProxy...");
+        setNettyParameters();
+        MCPipeline.useOptimizedPipeline();
+        c2pChannels = new DefaultChannelGroup(GlobalEventExecutor.INSTANCE);
+        loaderThread = new Thread(() -> {
+            ProtocolHack.init();
+            PluginManager.loadPlugins();
+        }, "ViaProtocolHack-Loader");
+
+        if (args.length == 0 && !GraphicsEnvironment.isHeadless()) {
+            loaderThread.start();
+            final ViaProxyUI[] ui = new ViaProxyUI[1];
+            SwingUtilities.invokeLater(() -> ui[0] = new ViaProxyUI());
+            loaderThread.join();
+            ui[0].setReady();
+            Logger.LOGGER.info("ViaProxy started successfully!");
+            return;
+        }
+
+        try {
+            Options.parse(args);
+        } catch (Throwable t) {
+            Logger.LOGGER.fatal("[" + t.getClass().getSimpleName() + "] " + t.getMessage());
+            return;
+        }
+
+        loaderThread.start();
+        loaderThread.join();
+        Logger.LOGGER.info("ViaProxy started successfully!");
+        startProxy();
+    }
+
+    public static void startProxy() {
+        if (currentProxyServer != null) {
+            throw new IllegalStateException("Proxy is already running");
+        }
+        currentProxyServer = new NetServer(Client2ProxyHandler::new, Client2ProxyChannelInitializer::new);
+        Logger.LOGGER.info("Binding proxy server to " + Options.BIND_ADDRESS + ":" + Options.BIND_PORT);
+        currentProxyServer.bind(Options.BIND_ADDRESS, Options.BIND_PORT, false);
+    }
+
+    public static void stopProxy() {
+        if (currentProxyServer != null) {
+            Logger.LOGGER.info("Stopping proxy server");
+            currentProxyServer.getChannel().close();
+            currentProxyServer = null;
+
+            for (Channel channel : c2pChannels) {
+                try {
+                    ProxyConnection.fromChannel(channel).kickClient("§cViaProxy has been stopped");
+                } catch (Throwable ignored) {
+                }
+            }
+        }
+    }
+
+    private static void setNettyParameters() {
+        ResourceLeakDetector.setLevel(ResourceLeakDetector.Level.DISABLED);
+        if (System.getProperty("io.netty.allocator.maxOrder") == null) {
+            System.setProperty("io.netty.allocator.maxOrder", "9");
+        }
+        if (Options.NETTY_THREADS > 0) {
+            System.setProperty("io.netty.eventLoopThreads", Integer.toString(Options.NETTY_THREADS));
+        }
+    }
+
+}
--- a/src/main/java/net/raphimc/viaproxy/cli/ConsoleFormatter.java
+++ b/src/main/java/net/raphimc/viaproxy/cli/ConsoleFormatter.java
@ -0,0 +1,87 @@
+package net.raphimc.viaproxy.cli;
+
+public class ConsoleFormatter {
+
+    private static final String PREFIX = "\033[";
+    private static final String SUFFIX = "m";
+
+    public static String convert(final String s) {
+        StringBuilder out = new StringBuilder();
+        char[] chars = s.toCharArray();
+        for (int i = 0; i < chars.length; i++) {
+            char c = chars[i];
+            char next = i + 1 < chars.length ? chars[i + 1] : '\0';
+            if (c == '§') {
+                if (next != '\0') {
+                    if (isColor(next)) out.append(convertToAnsi('r'));
+                    out.append(convertToAnsi(next));
+                    i++;
+                }
+            } else {
+                out.append(c);
+            }
+        }
+        return out + convertToAnsi('r');
+    }
+
+    //The ANSI codes are an approximation. True color is used to get the exact color.
+    private static String convertToAnsi(final char color) {
+        switch (Character.toLowerCase(color)) {
+            case '0': //Black
+                return PREFIX + getColor("30", 0x00_00_00) + SUFFIX;
+            case '1': //Dark Blue
+                return PREFIX + getColor("34", 0x00_00_AA) + SUFFIX;
+            case '2': //Dark Green
+                return PREFIX + getColor("32", 0x00_AA_00) + SUFFIX;
+            case '3': //Dark Aqua
+                return PREFIX + getColor("36", 0x00_AA_AA) + SUFFIX;
+            case '4': //Dark Red
+                return PREFIX + getColor("31", 0xAA_00_00) + SUFFIX;
+            case '5': //Dark Purple
+                return PREFIX + getColor("35", 0xAA_00_AA) + SUFFIX;
+            case '6': //Gold
+                return PREFIX + getColor("33", 0xFF_AA_00) + SUFFIX;
+            case '7': //Gray
+                return PREFIX + getColor("37", 0xAA_AA_AA) + SUFFIX;
+            case '8': //Dark Gray
+                return PREFIX + getColor("90", 0x55_55_55) + SUFFIX;
+            case '9': //Blue
+                return PREFIX + getColor("94", 0x55_55_FF) + SUFFIX;
+            case 'a': //Green
+                return PREFIX + getColor("92", 0x55_FF_55) + SUFFIX;
+            case 'b': //Aqua
+                return PREFIX + getColor("96", 0x55_FF_FF) + SUFFIX;
+            case 'c': //Red
+                return PREFIX + getColor("91", 0xFF_55_55) + SUFFIX;
+            case 'd': //Light Purple
+                return PREFIX + getColor("95", 0xFF_55_FF) + SUFFIX;
+            case 'e': //Yellow
+                return PREFIX + getColor("93", 0xFF_FF_55) + SUFFIX;
+            case 'f': //White
+                return PREFIX + getColor("97", 0xFF_FF_FF) + SUFFIX;
+            case 'k': //Obfuscated
+                return ""; //Not supported in terminal
+            case 'l': //Bold
+                return PREFIX + "1" + SUFFIX;
+            case 'm': //Strikethrough
+                return PREFIX + "9" + SUFFIX;
+            case 'n': //Underline
+                return PREFIX + "4" + SUFFIX;
+            case 'o': //Italic
+                return PREFIX + "3" + SUFFIX;
+            case 'r': //Reset
+            default:
+                return PREFIX + 0 + SUFFIX;
+        }
+    }
+
+    private static boolean isColor(char color) {
+        color = Character.toLowerCase(color);
+        return color >= '0' && color <= '9' || color >= 'a' && color <= 'f';
+    }
+
+    private static String getColor(final String ansi, final int rgb) {
+        return String.format("38;2;%d;%d;%d", (rgb >> 16) & 255, (rgb >> 8) & 255, rgb & 255);
+    }
+
+}
--- a/src/main/java/net/raphimc/viaproxy/cli/ConsoleHandler.java
+++ b/src/main/java/net/raphimc/viaproxy/cli/ConsoleHandler.java
@ -0,0 +1,42 @@
+package net.raphimc.viaproxy.cli;
+
+import com.viaversion.viaversion.api.Via;
+import com.viaversion.viaversion.connection.UserConnectionImpl;
+import net.raphimc.viaprotocolhack.commands.UserCommandSender;
+import net.raphimc.viaproxy.plugins.PluginManager;
+import net.raphimc.viaproxy.plugins.events.ConsoleCommandEvent;
+import net.raphimc.viaproxy.util.ArrayHelper;
+
+import java.util.Arrays;
+import java.util.Scanner;
+
+public class ConsoleHandler {
+
+    public static void hookConsole() {
+        new Thread(ConsoleHandler::listen, "Console-Handler").start();
+    }
+
+    private static void listen() {
+        final Scanner scanner = new Scanner(System.in);
+        while (scanner.hasNextLine()) {
+            final String line = scanner.nextLine();
+            final String[] parts = line.split(" ");
+            if (parts.length == 0) continue;
+            final String command = parts[0];
+            final ArrayHelper args = new ArrayHelper(Arrays.copyOfRange(parts, 1, parts.length));
+
+            if (command.equalsIgnoreCase("gc")) {
+                System.gc();
+                System.out.println("GC Done");
+            } else if (command.equalsIgnoreCase("via")) {
+                Via.getManager().getCommandHandler().onCommand(new UserCommandSender(new UserConnectionImpl(null, true)), args.getAsArray());
+            } else {
+                if (PluginManager.EVENT_MANAGER.call(new ConsoleCommandEvent(command, args.getAsArray())).isCancelled()) continue;
+                System.out.println("Invalid Command!");
+                System.out.println(" via | Run a viaversion command");
+                System.out.println(" gc | Run the garbage collector");
+            }
+        }
+    }
+
+}
--- a/src/main/java/net/raphimc/viaproxy/cli/options/BetterHelpFormatter.java
+++ b/src/main/java/net/raphimc/viaproxy/cli/options/BetterHelpFormatter.java
@ -0,0 +1,21 @@
+package net.raphimc.viaproxy.cli.options;
+
+import joptsimple.BuiltinHelpFormatter;
+import joptsimple.OptionDescriptor;
+import joptsimple.internal.Classes;
+import joptsimple.internal.Strings;
+
+public class BetterHelpFormatter extends BuiltinHelpFormatter {
+
+    public BetterHelpFormatter() {
+        super(250, 4);
+    }
+
+    @Override
+    protected String extractTypeIndicator(OptionDescriptor descriptor) {
+        String indicator = descriptor.argumentTypeIndicator();
+        if (indicator != null && indicator.startsWith("[")) return indicator.substring(1, indicator.length() - 1);
+        return !Strings.isNullOrEmpty(indicator) && !String.class.getName().equals(indicator) ? Classes.shortNameOf(indicator) : "String";
+    }
+
+}
--- a/src/main/java/net/raphimc/viaproxy/cli/options/Options.java
+++ b/src/main/java/net/raphimc/viaproxy/cli/options/Options.java
@ -0,0 +1,72 @@
+package net.raphimc.viaproxy.cli.options;
+
+import joptsimple.*;
+import net.raphimc.vialegacy.util.VersionEnum;
+import net.raphimc.viaproxy.util.logging.Logger;
+
+import java.io.IOException;
+
+import static java.util.Arrays.asList;
+
+public class Options {
+
+    public static String BIND_ADDRESS = "0.0.0.0";
+    public static int BIND_PORT = 25568;
+
+    public static boolean SRV_MODE; // Example: lenni0451.net_25565_1.8.x.viaproxy.127.0.0.1.nip.io
+    public static boolean INTERNAL_SRV_MODE; // Example: ip\7port\7version\7mppass
+    public static boolean ONLINE_MODE;
+    public static int NETTY_THREADS = 0;
+    public static int COMPRESSION_THRESHOLD = 256;
+
+    public static String CONNECT_ADDRESS;
+    public static int CONNECT_PORT;
+    public static VersionEnum PROTOCOL_VERSION;
+
+    public static boolean OPENAUTHMOD_AUTH;
+    public static boolean LOCAL_SOCKET_AUTH;
+    public static boolean BETACRAFT_AUTH;
+
+    public static void parse(final String[] args) throws IOException {
+        VersionEnum.init(); // We need to init the version list already here
+
+        final OptionParser parser = new OptionParser();
+        final OptionSpec<Void> help = parser.acceptsAll(asList("help", "h", "?"), "Get a list of all arguments").forHelp();
+
+        final OptionSpec<String> bindAddress = parser.acceptsAll(asList("bind_address", "bind_ip", "ba"), "The address the proxy should bind to").withRequiredArg().ofType(String.class).defaultsTo(BIND_ADDRESS);
+        final OptionSpec<Integer> bindPort = parser.acceptsAll(asList("bind_port", "bp"), "The port the proxy should bind to").withRequiredArg().ofType(Integer.class).defaultsTo(BIND_PORT);
+        final OptionSpec<Void> srvMode = parser.acceptsAll(asList("srv_mode", "srv", "s"), "Enable srv mode");
+        final OptionSpec<Void> iSrvMode = parser.acceptsAll(asList("internal_srv_mode", "isrv"), "Enable internal srv mode").availableUnless(srvMode);
+        final OptionSpec<Void> onlineMode = parser.acceptsAll(asList("online_mode", "om", "o"), "Enable online mode");
+        final OptionSpec<Integer> nettyThreads = parser.acceptsAll(asList("netty_threads", "t"), "The amount of netty threads to use").withRequiredArg().ofType(Integer.class).defaultsTo(NETTY_THREADS);
+        final OptionSpec<Integer> compressionThreshold = parser.acceptsAll(asList("compression_threshold", "ct", "c"), "The threshold for packet compression").withRequiredArg().ofType(Integer.class).defaultsTo(COMPRESSION_THRESHOLD);
+        final OptionSpec<String> connectAddress = parser.acceptsAll(asList("connect_address", "target_ip", "ca", "a"), "The address of the target server").withRequiredArg().ofType(String.class).required();
+        final OptionSpec<Integer> connectPort = parser.acceptsAll(asList("connect_port", "target_port", "cp", "p"), "The port of the target server").withRequiredArg().ofType(Integer.class).defaultsTo(CONNECT_PORT);
+        final OptionSpec<VersionEnum> version = parser.acceptsAll(asList("version", "v"), "The version of the target server").withRequiredArg().withValuesConvertedBy(new VersionEnumConverter()).required();
+        final OptionSpec<Void> openAuthModAuth = parser.acceptsAll(asList("openauthmod_auth", "oam_auth"), "Enable OpenAuthMod authentication");
+        final OptionSpec<Void> localSocketAuth = parser.accepts("local_socket_auth", "Enable authentication over a local socket");
+        final OptionSpec<Void> betaCraftAuth = parser.accepts("betacraft_auth", "Use BetaCraft authentication servers for classic");
+
+        final OptionSet options = parser.parse(args);
+        if (options.has(help)) {
+            parser.formatHelpWith(new BetterHelpFormatter());
+            parser.printHelpOn(Logger.SYSOUT);
+            System.exit(0);
+        }
+
+        BIND_ADDRESS = options.valueOf(bindAddress);
+        BIND_PORT = options.valueOf(bindPort);
+        SRV_MODE = options.has(srvMode);
+        INTERNAL_SRV_MODE = options.has(iSrvMode);
+        ONLINE_MODE = options.has(onlineMode);
+        NETTY_THREADS = options.valueOf(nettyThreads);
+        CONNECT_ADDRESS = options.valueOf(connectAddress);
+        CONNECT_PORT = options.valueOf(connectPort);
+        PROTOCOL_VERSION = options.valueOf(version);
+        COMPRESSION_THRESHOLD = options.valueOf(compressionThreshold);
+        OPENAUTHMOD_AUTH = options.has(openAuthModAuth);
+        LOCAL_SOCKET_AUTH = options.has(localSocketAuth);
+        BETACRAFT_AUTH = options.has(betaCraftAuth);
+    }
+
+}
--- a/src/main/java/net/raphimc/viaproxy/cli/options/VersionEnumConverter.java
+++ b/src/main/java/net/raphimc/viaproxy/cli/options/VersionEnumConverter.java
@ -0,0 +1,31 @@
+package net.raphimc.viaproxy.cli.options;
+
+import joptsimple.ValueConversionException;
+import joptsimple.ValueConverter;
+import net.raphimc.vialegacy.util.VersionEnum;
+
+public class VersionEnumConverter implements ValueConverter<VersionEnum> {
+
+    @Override
+    public VersionEnum convert(String s) {
+        for (VersionEnum version : VersionEnum.getAllVersions()) {
+            if (version.getName().equalsIgnoreCase(s)) return version;
+        }
+        throw new ValueConversionException("Unable to find version '" + s + "'");
+    }
+
+    @Override
+    public Class<VersionEnum> valueType() {
+        return VersionEnum.class;
+    }
+
+    @Override
+    public String valuePattern() {
+        StringBuilder s = new StringBuilder();
+        for (VersionEnum version : VersionEnum.getAllVersions()) {
+            s.append((s.length() == 0) ? "" : ", ").append(version.getName());
+        }
+        return "[" + s + "]";
+    }
+
+}
--- a/src/main/java/net/raphimc/viaproxy/injection/ClassicWorldHeightInjection.java
+++ b/src/main/java/net/raphimc/viaproxy/injection/ClassicWorldHeightInjection.java
@ -0,0 +1,173 @@
+package net.raphimc.viaproxy.injection;
+
+import com.viaversion.viaversion.api.Via;
+import com.viaversion.viaversion.api.connection.UserConnection;
+import com.viaversion.viaversion.api.minecraft.chunks.Chunk;
+import com.viaversion.viaversion.api.minecraft.chunks.ChunkSection;
+import com.viaversion.viaversion.api.protocol.remapper.PacketRemapper;
+import com.viaversion.viaversion.api.type.Type;
+import com.viaversion.viaversion.libs.opennbt.tag.builtin.*;
+import com.viaversion.viaversion.protocols.protocol1_17to1_16_4.Protocol1_17To1_16_4;
+import com.viaversion.viaversion.protocols.protocol1_17to1_16_4.types.Chunk1_17Type;
+import net.raphimc.vialegacy.protocols.classic.protocola1_0_15toc0_28_30.model.ClassicLevel;
+import net.raphimc.vialegacy.protocols.classic.protocola1_0_15toc0_28_30.providers.ClassicWorldHeightProvider;
+import net.raphimc.vialegacy.protocols.classic.protocola1_0_15toc0_28_30.storage.ClassicLevelStorage;
+import net.raphimc.vialegacy.util.VersionEnum;
+
+import java.util.*;
+
+public class ClassicWorldHeightInjection {
+
+    public static PacketRemapper handleJoinGame(final Protocol1_17To1_16_4 protocol, final PacketRemapper parentRemapper) {
+        return new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                handler(wrapper -> {
+                    parentRemapper.remap(wrapper);
+                    if (wrapper.isCancelled()) return;
+
+                    if (VersionEnum.fromUserConnection(wrapper.user()).isOlderThanOrEqualTo(VersionEnum.c0_28toc0_30)) {
+                        for (Tag dimension : wrapper.get(Type.NBT, 0).<CompoundTag>get("minecraft:dimension_type").<ListTag>get("value")) {
+                            changeDimensionTagHeight(wrapper.user(), ((CompoundTag) dimension).get("element"));
+                        }
+                        changeDimensionTagHeight(wrapper.user(), wrapper.get(Type.NBT, 1));
+                    }
+                });
+            }
+        };
+    }
+
+    public static PacketRemapper handleRespawn(final Protocol1_17To1_16_4 protocol, final PacketRemapper parentRemapper) {
+        return new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                handler(wrapper -> {
+                    parentRemapper.remap(wrapper);
+                    if (wrapper.isCancelled()) return;
+
+                    if (VersionEnum.fromUserConnection(wrapper.user()).isOlderThanOrEqualTo(VersionEnum.c0_28toc0_30)) {
+                        changeDimensionTagHeight(wrapper.user(), wrapper.get(Type.NBT, 0));
+                    }
+                });
+            }
+        };
+    }
+
+    public static PacketRemapper handleChunkData(final Protocol1_17To1_16_4 protocol, final PacketRemapper parentRemapper) {
+        return new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                handler(wrapper -> {
+                    parentRemapper.remap(wrapper);
+                    if (wrapper.isCancelled()) return;
+
+                    if (VersionEnum.fromUserConnection(wrapper.user()).isOlderThanOrEqualTo(VersionEnum.c0_28toc0_30)) {
+                        wrapper.resetReader();
+                        final Chunk chunk = wrapper.read(new Chunk1_17Type(16));
+                        wrapper.write(new Chunk1_17Type(chunk.getSections().length), chunk);
+
+                        final ClassicWorldHeightProvider heightProvider = Via.getManager().getProviders().get(ClassicWorldHeightProvider.class);
+                        if (chunk.getSections().length < heightProvider.getMaxChunkSectionCount(wrapper.user())) { // Increase available sections to match new world height
+                            final ChunkSection[] newArray = new ChunkSection[heightProvider.getMaxChunkSectionCount(wrapper.user())];
+                            System.arraycopy(chunk.getSections(), 0, newArray, 0, chunk.getSections().length);
+                            chunk.setSections(newArray);
+                        }
+
+                        final BitSet chunkMask = new BitSet();
+                        for (int i = 0; i < chunk.getSections().length; i++) {
+                            if (chunk.getSections()[i] != null) chunkMask.set(i);
+                        }
+                        chunk.setChunkMask(chunkMask);
+
+                        final int[] newBiomeData = new int[chunk.getSections().length * 4 * 4 * 4];
+                        System.arraycopy(chunk.getBiomeData(), 0, newBiomeData, 0, chunk.getBiomeData().length);
+                        for (int i = 64; i < chunk.getSections().length * 4; i++) { // copy top layer of old biome data all the way to max world height
+                            System.arraycopy(chunk.getBiomeData(), chunk.getBiomeData().length - 16, newBiomeData, i * 16, 16);
+                        }
+                        chunk.setBiomeData(newBiomeData);
+
+                        chunk.setHeightMap(new CompoundTag()); // rip heightmap :(
+                    }
+                });
+            }
+        };
+    }
+
+    public static PacketRemapper handleUpdateLight(final Protocol1_17To1_16_4 protocol, final PacketRemapper parentRemapper) {
+        final PacketRemapper classicLightHandler = new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                map(Type.VAR_INT); // x
+                map(Type.VAR_INT); // y
+                map(Type.BOOLEAN); // trust edges
+                handler(wrapper -> {
+                    wrapper.read(Type.VAR_INT); // sky light mask
+                    wrapper.read(Type.VAR_INT); // block light mask
+                    final int emptySkyLightMask = wrapper.read(Type.VAR_INT); // empty sky light mask
+                    final int emptyBlockLightMask = wrapper.read(Type.VAR_INT); // empty block light mask
+
+                    final ClassicLevel level = wrapper.user().get(ClassicLevelStorage.class).getClassicLevel();
+                    final ClassicWorldHeightProvider heightProvider = Via.getManager().getProviders().get(ClassicWorldHeightProvider.class);
+
+                    int sectionYCount = level.getSizeY() >> 4;
+                    if (level.getSizeY() % 16 != 0) sectionYCount++;
+                    if (sectionYCount > heightProvider.getMaxChunkSectionCount(wrapper.user())) {
+                        sectionYCount = heightProvider.getMaxChunkSectionCount(wrapper.user());
+                    }
+
+                    final List<byte[]> lightArrays = new ArrayList<>();
+                    while (wrapper.isReadable(Type.BYTE_ARRAY_PRIMITIVE, 0)) {
+                        lightArrays.add(wrapper.read(Type.BYTE_ARRAY_PRIMITIVE));
+                    }
+
+                    int skyLightCount = 16;
+                    int blockLightCount = sectionYCount;
+                    if (lightArrays.size() == 16 + 0 + 2) {
+                        blockLightCount = 0;
+                    } else if (lightArrays.size() == 16 + sectionYCount + 2) {
+                    } else if (lightArrays.size() == sectionYCount + sectionYCount + 2) {
+                        skyLightCount = sectionYCount;
+                    }
+                    skyLightCount += 2; // Chunk below 0 and above 255
+
+                    final BitSet skyLightMask = new BitSet();
+                    final BitSet blockLightMask = new BitSet();
+                    skyLightMask.set(0, skyLightCount);
+                    blockLightMask.set(0, blockLightCount);
+
+                    wrapper.write(Type.LONG_ARRAY_PRIMITIVE, skyLightMask.toLongArray());
+                    wrapper.write(Type.LONG_ARRAY_PRIMITIVE, blockLightMask.toLongArray());
+                    wrapper.write(Type.LONG_ARRAY_PRIMITIVE, new long[emptySkyLightMask]);
+                    wrapper.write(Type.LONG_ARRAY_PRIMITIVE, new long[emptyBlockLightMask]);
+
+                    wrapper.write(Type.VAR_INT, skyLightCount);
+                    for (int i = 0; i < skyLightCount; i++) {
+                        wrapper.write(Type.BYTE_ARRAY_PRIMITIVE, lightArrays.remove(0));
+                    }
+                    wrapper.write(Type.VAR_INT, blockLightCount);
+                    for (int i = 0; i < blockLightCount; i++) {
+                        wrapper.write(Type.BYTE_ARRAY_PRIMITIVE, lightArrays.remove(0));
+                    }
+                });
+            }
+        };
+
+        return new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                handler(wrapper -> {
+                    if (VersionEnum.fromUserConnection(wrapper.user()).isOlderThanOrEqualTo(VersionEnum.c0_28toc0_30)) {
+                        classicLightHandler.remap(wrapper);
+                    } else {
+                        parentRemapper.remap(wrapper);
+                    }
+                });
+            }
+        };
+    }
+
+    private static void changeDimensionTagHeight(final UserConnection user, final CompoundTag tag) {
+        tag.put("height", new IntTag(Via.getManager().getProviders().get(ClassicWorldHeightProvider.class).getMaxChunkSectionCount(user) << 4));
+    }
+
+}
--- a/src/main/java/net/raphimc/viaproxy/injection/mixins/MixinAbstractFenceConnectionHandler.java
+++ b/src/main/java/net/raphimc/viaproxy/injection/mixins/MixinAbstractFenceConnectionHandler.java
@ -0,0 +1,34 @@
+package net.raphimc.viaproxy.injection.mixins;
+
+import com.viaversion.viaversion.api.connection.UserConnection;
+import com.viaversion.viaversion.api.minecraft.BlockFace;
+import com.viaversion.viaversion.api.minecraft.Position;
+import com.viaversion.viaversion.protocols.protocol1_13to1_12_2.blockconnections.AbstractFenceConnectionHandler;
+import net.raphimc.vialegacy.util.VersionEnum;
+import org.spongepowered.asm.mixin.*;
+
+@Mixin(value = AbstractFenceConnectionHandler.class, remap = false)
+public abstract class MixinAbstractFenceConnectionHandler {
+
+    @Shadow
+    protected abstract boolean connects(BlockFace side, int blockState, boolean pre1_12);
+
+    @Shadow
+    public abstract int getBlockData(UserConnection user, Position position);
+
+    /**
+     * @author RK_01
+     * @reason Fixes version comparisons
+     */
+    @Overwrite
+    public byte getStates(UserConnection user, Position position, int blockState) {
+        byte states = 0;
+        boolean pre1_12 = VersionEnum.fromUserConnection(user).isOlderThan(VersionEnum.r1_12);
+        if (connects(BlockFace.EAST, getBlockData(user, position.getRelative(BlockFace.EAST)), pre1_12)) states |= 1;
+        if (connects(BlockFace.NORTH, getBlockData(user, position.getRelative(BlockFace.NORTH)), pre1_12)) states |= 2;
+        if (connects(BlockFace.SOUTH, getBlockData(user, position.getRelative(BlockFace.SOUTH)), pre1_12)) states |= 4;
+        if (connects(BlockFace.WEST, getBlockData(user, position.getRelative(BlockFace.WEST)), pre1_12)) states |= 8;
+        return states;
+    }
+
+}
--- a/src/main/java/net/raphimc/viaproxy/injection/mixins/MixinChatItemRewriter.java
+++ b/src/main/java/net/raphimc/viaproxy/injection/mixins/MixinChatItemRewriter.java
@ -0,0 +1,30 @@
+package net.raphimc.viaproxy.injection.mixins;
+
+import com.viaversion.viaversion.api.Via;
+import com.viaversion.viaversion.api.minecraft.nbt.BinaryTagIO;
+import com.viaversion.viaversion.libs.opennbt.tag.builtin.CompoundTag;
+import com.viaversion.viaversion.protocols.protocol1_12to1_11_1.ChatItemRewriter;
+import net.raphimc.vialegacy.util.ViaStringTagReader1_11_2;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Redirect;
+
+import java.util.logging.Level;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+@Mixin(value = ChatItemRewriter.class, remap = false)
+public abstract class MixinChatItemRewriter {
+
+    @Redirect(method = "toClient", at = @At(value = "INVOKE", target = "Ljava/util/regex/Pattern;matcher(Ljava/lang/CharSequence;)Ljava/util/regex/Matcher;"))
+    private static Matcher rewriteShowItem(Pattern pattern, CharSequence input) {
+        try {
+            final CompoundTag tag = ViaStringTagReader1_11_2.getTagFromJson(input.toString());
+            input = BinaryTagIO.writeString(tag);
+        } catch (Throwable e) {
+            Via.getPlatform().getLogger().log(Level.WARNING, "Error converting 1.11.2 nbt to 1.12.2 nbt: '" + input + "'", e);
+        }
+        return Pattern.compile("$^").matcher(input);
+    }
+
+}
--- a/src/main/java/net/raphimc/viaproxy/injection/mixins/MixinChunk1_8Type.java
+++ b/src/main/java/net/raphimc/viaproxy/injection/mixins/MixinChunk1_8Type.java
@ -0,0 +1,37 @@
+package net.raphimc.viaproxy.injection.mixins;
+
+import com.viaversion.viaversion.api.Via;
+import com.viaversion.viaversion.api.minecraft.chunks.*;
+import com.viaversion.viaversion.protocols.protocol1_9to1_8.types.Chunk1_8Type;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.Shadow;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Redirect;
+
+import java.util.ArrayList;
+import java.util.logging.Level;
+
+@Mixin(value = Chunk1_8Type.class, remap = false)
+public abstract class MixinChunk1_8Type {
+
+    @Shadow
+    public static Chunk deserialize(int chunkX, int chunkZ, boolean fullChunk, boolean skyLight, int bitmask, byte[] data) {
+        return null;
+    }
+
+    @Redirect(method = "read(Lio/netty/buffer/ByteBuf;Lcom/viaversion/viaversion/protocols/protocol1_9_3to1_9_1_2/storage/ClientWorld;)Lcom/viaversion/viaversion/api/minecraft/chunks/Chunk;", at = @At(value = "INVOKE", target = "Lcom/viaversion/viaversion/protocols/protocol1_9to1_8/types/Chunk1_8Type;deserialize(IIZZI[B)Lcom/viaversion/viaversion/api/minecraft/chunks/Chunk;"))
+    private Chunk fixAegis(int chunkX, int chunkZ, boolean fullChunk, boolean skyLight, int bitmask, byte[] data) {
+        try {
+            return deserialize(chunkX, chunkZ, fullChunk, skyLight, bitmask, data);
+        } catch (Throwable e) {
+            Via.getPlatform().getLogger().log(Level.WARNING, "The server sent an invalid chunk data packet, returning an empty chunk", e);
+            final ChunkSection[] airSections = new ChunkSection[16];
+            for (int i = 0; i < airSections.length; i++) {
+                airSections[i] = new ChunkSectionImpl(true);
+                airSections[i].palette(PaletteType.BLOCKS).addId(0);
+            }
+            return new BaseChunk(chunkX, chunkZ, fullChunk, false, 65535, airSections, new int[256], new ArrayList<>());
+        }
+    }
+
+}
--- a/src/main/java/net/raphimc/viaproxy/injection/mixins/MixinCommandBlockProvider.java
+++ b/src/main/java/net/raphimc/viaproxy/injection/mixins/MixinCommandBlockProvider.java
@ -0,0 +1,16 @@
+package net.raphimc.viaproxy.injection.mixins;
+
+import com.viaversion.viaversion.protocols.protocol1_9to1_8.providers.CommandBlockProvider;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.injection.Constant;
+import org.spongepowered.asm.mixin.injection.ModifyConstant;
+
+@Mixin(value = CommandBlockProvider.class, remap = false)
+public abstract class MixinCommandBlockProvider {
+
+    @ModifyConstant(method = "sendPermission", constant = @Constant(intValue = 26))
+    private int modifyOpLevel() {
+        return 28; // Op Level 4
+    }
+
+}
--- a/src/main/java/net/raphimc/viaproxy/injection/mixins/MixinCommonBoss.java
+++ b/src/main/java/net/raphimc/viaproxy/injection/mixins/MixinCommonBoss.java
@ -0,0 +1,15 @@
+package net.raphimc.viaproxy.injection.mixins;
+
+import com.viaversion.viaversion.legacy.bossbar.CommonBoss;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Redirect;
+
+@Mixin(value = CommonBoss.class, remap = false)
+public abstract class MixinCommonBoss {
+
+    @Redirect(method = {"<init>", "setHealth"}, at = @At(value = "INVOKE", target = "Lcom/google/common/base/Preconditions;checkArgument(ZLjava/lang/Object;)V"))
+    private void removeBoundChecks(boolean expression, Object errorMessage) {
+    }
+
+}
--- a/src/main/java/net/raphimc/viaproxy/injection/mixins/MixinEntityPackets1_17.java
+++ b/src/main/java/net/raphimc/viaproxy/injection/mixins/MixinEntityPackets1_17.java
@ -0,0 +1,25 @@
+package net.raphimc.viaproxy.injection.mixins;
+
+import com.viaversion.viaversion.api.protocol.Protocol;
+import com.viaversion.viaversion.api.protocol.packet.ClientboundPacketType;
+import com.viaversion.viaversion.api.protocol.remapper.PacketRemapper;
+import com.viaversion.viaversion.protocols.protocol1_16_2to1_16_1.ClientboundPackets1_16_2;
+import com.viaversion.viaversion.protocols.protocol1_17to1_16_4.Protocol1_17To1_16_4;
+import com.viaversion.viaversion.protocols.protocol1_17to1_16_4.packets.EntityPackets;
+import net.raphimc.viaproxy.injection.ClassicWorldHeightInjection;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Redirect;
+
+@Mixin(value = EntityPackets.class, remap = false)
+public abstract class MixinEntityPackets1_17 {
+
+    @Redirect(method = "registerPackets", at = @At(value = "INVOKE", target = "Lcom/viaversion/viaversion/protocols/protocol1_17to1_16_4/Protocol1_17To1_16_4;registerClientbound(Lcom/viaversion/viaversion/api/protocol/packet/ClientboundPacketType;Lcom/viaversion/viaversion/api/protocol/remapper/PacketRemapper;)V"))
+    private void handleClassicWorldHeight(Protocol1_17To1_16_4 instance, ClientboundPacketType packetType, PacketRemapper packetRemapper) {
+        if (packetType == ClientboundPackets1_16_2.JOIN_GAME) packetRemapper = ClassicWorldHeightInjection.handleJoinGame(instance, packetRemapper);
+        if (packetType == ClientboundPackets1_16_2.RESPAWN) packetRemapper = ClassicWorldHeightInjection.handleRespawn(instance, packetRemapper);
+
+        ((Protocol) instance).registerClientbound(packetType, packetRemapper);
+    }
+
+}
--- a/src/main/java/net/raphimc/viaproxy/injection/mixins/MixinEntityPackets_6_1.java
+++ b/src/main/java/net/raphimc/viaproxy/injection/mixins/MixinEntityPackets_6_1.java
@ -0,0 +1,25 @@
+package net.raphimc.viaproxy.injection.mixins;
+
+import com.viaversion.viaversion.api.protocol.packet.PacketWrapper;
+import com.viaversion.viaversion.api.type.Type;
+import com.viaversion.viaversion.protocols.protocol1_9to1_8.Protocol1_9To1_8;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Inject;
+import org.spongepowered.asm.mixin.injection.callback.CallbackInfoReturnable;
+
+@Mixin(targets = "com.viaversion.viaversion.protocols.protocol1_9to1_8.packets.EntityPackets$6$1", remap = false)
+public abstract class MixinEntityPackets_6_1 {
+
+    @SuppressWarnings({"UnresolvedMixinReference", "MixinAnnotationTarget"})
+    @Inject(method = "transform(Lcom/viaversion/viaversion/api/protocol/packet/PacketWrapper;Ljava/lang/Short;)Ljava/lang/Integer;", at = @At(value = "INVOKE", target = "Lcom/viaversion/viaversion/api/data/entity/EntityTracker;clientEntityId()I"), cancellable = true)
+    private void fixOutOfBoundsSlot(PacketWrapper wrapper, Short slot, CallbackInfoReturnable<Integer> cir) throws Exception {
+        final int entityId = wrapper.get(Type.VAR_INT, 0);
+        final int clientPlayerId = wrapper.user().getEntityTracker(Protocol1_9To1_8.class).clientEntityId();
+        if (slot < 0 || slot > 4 || (entityId == clientPlayerId && slot > 3)) {
+            wrapper.cancel();
+            cir.setReturnValue(0);
+        }
+    }
+
+}
--- a/src/main/java/net/raphimc/viaproxy/injection/mixins/MixinEntityTracker1_9.java
+++ b/src/main/java/net/raphimc/viaproxy/injection/mixins/MixinEntityTracker1_9.java
@ -0,0 +1,30 @@
+package net.raphimc.viaproxy.injection.mixins;
+
+import com.viaversion.viaversion.api.minecraft.metadata.Metadata;
+import com.viaversion.viaversion.protocols.protocol1_9to1_8.storage.EntityTracker1_9;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.injection.*;
+
+@Mixin(value = EntityTracker1_9.class, remap = false)
+public abstract class MixinEntityTracker1_9 {
+
+    @Redirect(method = "handleMetadata", at = @At(value = "INVOKE", target = "Ljava/lang/Math;min(FF)F"), slice = @Slice(from = @At(value = "INVOKE", target = "Lcom/viaversion/viaversion/api/configuration/ViaVersionConfig;isBossbarAntiflicker()Z")))
+    private float removeMin(float a, float b) {
+        return a;
+    }
+
+    @Redirect(method = "handleMetadata", at = @At(value = "INVOKE", target = "Ljava/lang/Math;max(FF)F"), slice = @Slice(from = @At(value = "INVOKE", target = "Lcom/viaversion/viaversion/api/configuration/ViaVersionConfig;isBossbarAntiflicker()Z")))
+    private float removeMax(float a, float b) {
+        return b;
+    }
+
+    @Redirect(method = "handleMetadata", at = @At(value = "INVOKE", target = "Lcom/viaversion/viaversion/api/minecraft/metadata/Metadata;getValue()Ljava/lang/Object;"), slice = @Slice(from = @At(value = "INVOKE", target = "Lcom/viaversion/viaversion/api/configuration/ViaVersionConfig;isBossbarAntiflicker()Z")))
+    private Object remapNaNToZero(Metadata instance) {
+        if (instance.getValue() instanceof Float && ((Float) instance.getValue()).isNaN()) {
+            return 0F;
+        }
+
+        return instance.getValue();
+    }
+
+}
--- a/src/main/java/net/raphimc/viaproxy/injection/mixins/MixinGlassConnectionHandler.java
+++ b/src/main/java/net/raphimc/viaproxy/injection/mixins/MixinGlassConnectionHandler.java
@ -0,0 +1,32 @@
+package net.raphimc.viaproxy.injection.mixins;
+
+import com.viaversion.viaversion.api.connection.ProtocolInfo;
+import com.viaversion.viaversion.api.connection.UserConnection;
+import com.viaversion.viaversion.api.minecraft.Position;
+import com.viaversion.viaversion.protocols.protocol1_13to1_12_2.blockconnections.AbstractFenceConnectionHandler;
+import com.viaversion.viaversion.protocols.protocol1_13to1_12_2.blockconnections.GlassConnectionHandler;
+import net.raphimc.vialegacy.util.VersionEnum;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.Overwrite;
+
+@Mixin(value = GlassConnectionHandler.class, remap = false)
+public abstract class MixinGlassConnectionHandler extends AbstractFenceConnectionHandler {
+
+    protected MixinGlassConnectionHandler(String blockConnections) {
+        super(blockConnections);
+    }
+
+    /**
+     * @author RK_01
+     * @reason Fixes version comparisons
+     */
+    @Overwrite
+    public byte getStates(UserConnection user, Position position, int blockState) {
+        byte states = super.getStates(user, position, blockState);
+        if (states != 0) return states;
+
+        ProtocolInfo protocolInfo = user.getProtocolInfo();
+        return VersionEnum.fromUserConnection(user).isOlderThanOrEqualTo(VersionEnum.r1_8) && protocolInfo.getServerProtocolVersion() != -1 ? 0xF : states;
+    }
+
+}
--- a/src/main/java/net/raphimc/viaproxy/injection/mixins/MixinInventoryPackets_3_1.java
+++ b/src/main/java/net/raphimc/viaproxy/injection/mixins/MixinInventoryPackets_3_1.java
@ -0,0 +1,18 @@
+package net.raphimc.viaproxy.injection.mixins;
+
+import com.viaversion.viaversion.api.protocol.packet.PacketWrapper;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Inject;
+import org.spongepowered.asm.mixin.injection.callback.CallbackInfo;
+
+@Mixin(targets = "com.viaversion.viaversion.protocols.protocol1_14to1_13_2.packets.InventoryPackets$3$1", remap = false)
+public abstract class MixinInventoryPackets_3_1 {
+
+    @SuppressWarnings({"UnresolvedMixinReference", "MixinAnnotationTarget"})
+    @Inject(method = "handle", at = @At(value = "FIELD", target = "Lcom/viaversion/viaversion/api/type/Type;BOOLEAN:Lcom/viaversion/viaversion/api/type/types/BooleanType;", ordinal = 2, shift = At.Shift.BEFORE))
+    private void removeExtraData(PacketWrapper wrapper, CallbackInfo ci) {
+        wrapper.clearInputBuffer();
+    }
+
+}
--- a/src/main/java/net/raphimc/viaproxy/injection/mixins/MixinMetadataRewriter1_9To1_8.java
+++ b/src/main/java/net/raphimc/viaproxy/injection/mixins/MixinMetadataRewriter1_9To1_8.java
@ -0,0 +1,25 @@
+package net.raphimc.viaproxy.injection.mixins;
+
+import com.viaversion.viaversion.api.connection.UserConnection;
+import com.viaversion.viaversion.api.minecraft.entities.EntityType;
+import com.viaversion.viaversion.api.minecraft.metadata.Metadata;
+import com.viaversion.viaversion.protocols.protocol1_9to1_8.Protocol1_9To1_8;
+import com.viaversion.viaversion.protocols.protocol1_9to1_8.metadata.MetadataRewriter1_9To1_8;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Inject;
+import org.spongepowered.asm.mixin.injection.callback.CallbackInfo;
+
+import java.util.List;
+
+@Mixin(value = MetadataRewriter1_9To1_8.class, remap = false)
+public abstract class MixinMetadataRewriter1_9To1_8 {
+
+    @Inject(method = "handleMetadata", at = @At(value = "FIELD", target = "Lcom/viaversion/viaversion/protocols/protocol1_9to1_8/metadata/MetaIndex;PLAYER_HAND:Lcom/viaversion/viaversion/protocols/protocol1_9to1_8/metadata/MetaIndex;", ordinal = 0, shift = At.Shift.BEFORE), cancellable = true)
+    private void preventMetadataForClientPlayer(int entityId, EntityType type, Metadata metadata, List<Metadata> metadatas, UserConnection connection, CallbackInfo ci) {
+        if (connection.getEntityTracker(Protocol1_9To1_8.class).clientEntityId() == entityId) {
+            ci.cancel();
+        }
+    }
+
+}
--- a/src/main/java/net/raphimc/viaproxy/injection/mixins/MixinProtocolVersion.java
+++ b/src/main/java/net/raphimc/viaproxy/injection/mixins/MixinProtocolVersion.java
@ -0,0 +1,70 @@
+package net.raphimc.viaproxy.injection.mixins;
+
+import com.google.common.collect.ImmutableSet;
+import com.viaversion.viaversion.api.protocol.version.ProtocolVersion;
+import com.viaversion.viaversion.api.protocol.version.VersionRange;
+import com.viaversion.viaversion.util.Pair;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.Unique;
+import org.spongepowered.asm.mixin.injection.*;
+import org.spongepowered.asm.mixin.injection.callback.CallbackInfo;
+
+import java.util.*;
+
+@Mixin(value = ProtocolVersion.class, remap = false)
+public abstract class MixinProtocolVersion {
+
+    @Unique
+    private static Set<String> skips;
+
+    @Unique
+    private static Map<String, Pair<String, VersionRange>> remaps;
+
+    @Inject(method = "<clinit>", at = @At("HEAD"))
+    private static void initMaps(CallbackInfo ci) {
+        skips = ImmutableSet.of("1.4.6/7", "1.5.1", "1.5.2", "1.6.1", "1.6.2", "1.6.3", "1.6.4");
+        remaps = new HashMap<>();
+        remaps.put("1.7-1.7.5", new Pair<>("1.7.2-1.7.5", new VersionRange("1.7", 2, 5)));
+        remaps.put("1.9.3/4", new Pair<>("1.9.3-1.9.4", null));
+        remaps.put("1.11.1/2", new Pair<>("1.11.1-1.11.2", null));
+        remaps.put("1.16.4/5", new Pair<>("1.16.4-1.16.5", null));
+        remaps.put("1.18/1.18.1", new Pair<>("1.18-1.18.1", null));
+        remaps.put("1.19.1/2", new Pair<>("1.19.1-1.19.2", null));
+    }
+
+    @Redirect(method = "<clinit>", at = @At(value = "INVOKE", target = "Lcom/viaversion/viaversion/api/protocol/version/ProtocolVersion;register(ILjava/lang/String;)Lcom/viaversion/viaversion/api/protocol/version/ProtocolVersion;"))
+    private static ProtocolVersion unregisterAndRenameVersions(int version, String name) {
+        if (skips.contains(name)) return null;
+        final Pair<String, VersionRange> remapEntry = remaps.get(name);
+        if (remapEntry != null) {
+            if (remapEntry.key() != null) name = remapEntry.key();
+        }
+
+        return ProtocolVersion.register(version, name);
+    }
+
+    @SuppressWarnings({"UnresolvedMixinReference", "MixinAnnotationTarget", "InvalidInjectorMethodSignature"}) // Optional injection
+    @Redirect(method = "<clinit>", at = @At(value = "INVOKE", target = "Lcom/viaversion/viaversion/api/protocol/version/ProtocolVersion;register(IILjava/lang/String;)Lcom/viaversion/viaversion/api/protocol/version/ProtocolVersion;"), require = 0)
+    private static ProtocolVersion unregisterAndRenameVersions(int version, int snapshotVersion, String name) {
+        if (skips.contains(name)) return null;
+        final Pair<String, VersionRange> remapEntry = remaps.get(name);
+        if (remapEntry != null) {
+            if (remapEntry.key() != null) name = remapEntry.key();
+        }
+
+        return ProtocolVersion.register(version, snapshotVersion, name);
+    }
+
+    @Redirect(method = "<clinit>", at = @At(value = "INVOKE", target = "Lcom/viaversion/viaversion/api/protocol/version/ProtocolVersion;register(ILjava/lang/String;Lcom/viaversion/viaversion/api/protocol/version/VersionRange;)Lcom/viaversion/viaversion/api/protocol/version/ProtocolVersion;"))
+    private static ProtocolVersion unregisterAndRenameVersions(int version, String name, VersionRange versionRange) {
+        if (skips.contains(name)) return null;
+        final Pair<String, VersionRange> remapEntry = remaps.get(name);
+        if (remapEntry != null) {
+            if (remapEntry.key() != null) name = remapEntry.key();
+            if (remapEntry.value() != null) versionRange = remapEntry.value();
+        }
+
+        return ProtocolVersion.register(version, name, versionRange);
+    }
+
+}
--- a/src/main/java/net/raphimc/viaproxy/injection/mixins/MixinWorldPackets1_13.java
+++ b/src/main/java/net/raphimc/viaproxy/injection/mixins/MixinWorldPackets1_13.java
@ -0,0 +1,17 @@
+package net.raphimc.viaproxy.injection.mixins;
+
+import com.viaversion.viaversion.protocols.protocol1_13to1_12_2.packets.WorldPackets;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Inject;
+import org.spongepowered.asm.mixin.injection.callback.CallbackInfoReturnable;
+
+@Mixin(value = WorldPackets.class, remap = false)
+public abstract class MixinWorldPackets1_13 {
+
+    @Inject(method = "toNewId", at = @At(value = "RETURN", ordinal = 2), cancellable = true)
+    private static void returnAirDefault(int oldId, CallbackInfoReturnable<Integer> cir) {
+        cir.setReturnValue(0);
+    }
+
+}
--- a/src/main/java/net/raphimc/viaproxy/injection/mixins/MixinWorldPackets1_17.java
+++ b/src/main/java/net/raphimc/viaproxy/injection/mixins/MixinWorldPackets1_17.java
@ -0,0 +1,25 @@
+package net.raphimc.viaproxy.injection.mixins;
+
+import com.viaversion.viaversion.api.protocol.Protocol;
+import com.viaversion.viaversion.api.protocol.packet.ClientboundPacketType;
+import com.viaversion.viaversion.api.protocol.remapper.PacketRemapper;
+import com.viaversion.viaversion.protocols.protocol1_16_2to1_16_1.ClientboundPackets1_16_2;
+import com.viaversion.viaversion.protocols.protocol1_17to1_16_4.Protocol1_17To1_16_4;
+import com.viaversion.viaversion.protocols.protocol1_17to1_16_4.packets.WorldPackets;
+import net.raphimc.viaproxy.injection.ClassicWorldHeightInjection;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Redirect;
+
+@Mixin(value = WorldPackets.class, remap = false)
+public abstract class MixinWorldPackets1_17 {
+
+    @Redirect(method = "register", at = @At(value = "INVOKE", target = "Lcom/viaversion/viaversion/protocols/protocol1_17to1_16_4/Protocol1_17To1_16_4;registerClientbound(Lcom/viaversion/viaversion/api/protocol/packet/ClientboundPacketType;Lcom/viaversion/viaversion/api/protocol/remapper/PacketRemapper;)V"))
+    private static void handleClassicWorldHeight(Protocol1_17To1_16_4 instance, ClientboundPacketType packetType, PacketRemapper packetRemapper) {
+        if (packetType == ClientboundPackets1_16_2.CHUNK_DATA) packetRemapper = ClassicWorldHeightInjection.handleChunkData(instance, packetRemapper);
+        if (packetType == ClientboundPackets1_16_2.UPDATE_LIGHT) packetRemapper = ClassicWorldHeightInjection.handleUpdateLight(instance, packetRemapper);
+
+        ((Protocol) instance).registerClientbound(packetType, packetRemapper);
+    }
+
+}
--- a/src/main/java/net/raphimc/viaproxy/injection/mixins/MixinWorldPackets_2.java
+++ b/src/main/java/net/raphimc/viaproxy/injection/mixins/MixinWorldPackets_2.java
@ -0,0 +1,15 @@
+package net.raphimc.viaproxy.injection.mixins;
+
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.injection.Constant;
+import org.spongepowered.asm.mixin.injection.ModifyConstant;
+
+@Mixin(targets = "com.viaversion.viaversion.protocols.protocol1_16_2to1_16_1.packets.WorldPackets$2", remap = false)
+public abstract class MixinWorldPackets_2 {
+
+    @ModifyConstant(method = "lambda$registerMap$0", constant = @Constant(intValue = 16))
+    private static int modifySectionCountToSupportClassicWorldHeight() {
+        return 64;
+    }
+
+}
--- a/src/main/java/net/raphimc/viaproxy/injection/transformer/ConnectionDataTransformer.java
+++ b/src/main/java/net/raphimc/viaproxy/injection/transformer/ConnectionDataTransformer.java
@ -0,0 +1,52 @@
+package net.raphimc.viaproxy.injection.transformer;
+
+import com.viaversion.viaversion.protocols.protocol1_13to1_12_2.blockconnections.ConnectionData;
+import net.lenni0451.classtransform.annotations.CTransformer;
+import net.lenni0451.classtransform.annotations.injection.CASM;
+import org.objectweb.asm.Opcodes;
+import org.objectweb.asm.tree.*;
+
+@CTransformer(ConnectionData.class)
+public abstract class ConnectionDataTransformer {
+
+    @CASM("update")
+    public static void preventBlockChangeSpam1(MethodNode method) {
+        LabelNode continueLabel = new LabelNode();
+        InsnList checkCode = new InsnList();
+        checkCode.add(new VarInsnNode(Opcodes.ILOAD, 7));
+        checkCode.add(new VarInsnNode(Opcodes.ILOAD, 9));
+        checkCode.add(new JumpInsnNode(Opcodes.IF_ICMPEQ, continueLabel));
+
+        for (AbstractInsnNode insn : method.instructions.toArray()) {
+            if (checkCode != null && insn.getOpcode() == Opcodes.ISTORE) {
+                VarInsnNode varInsn = (VarInsnNode) insn;
+                if (varInsn.var == 9) {
+                    method.instructions.insert(insn, checkCode);
+                    checkCode = null;
+                }
+            } else if (continueLabel != null && insn.getOpcode() == Opcodes.IINC) {
+                method.instructions.insertBefore(insn, continueLabel);
+                continueLabel = null;
+            }
+        }
+    }
+
+    @CASM("updateBlock")
+    public static void preventBlockChangeSpam2(MethodNode method) {
+        LabelNode addLabel = new LabelNode();
+        InsnList checkCode = new InsnList();
+        checkCode.add(new VarInsnNode(Opcodes.ILOAD, 3));
+        checkCode.add(new VarInsnNode(Opcodes.ILOAD, 5));
+        checkCode.add(new JumpInsnNode(Opcodes.IF_ICMPNE, addLabel));
+        checkCode.add(new InsnNode(Opcodes.RETURN));
+        checkCode.add(addLabel);
+
+        for (AbstractInsnNode insn : method.instructions.toArray()) {
+            if (insn.getOpcode() == Opcodes.INVOKEINTERFACE) {
+                method.instructions.insertBefore(insn, checkCode);
+                break;
+            }
+        }
+    }
+
+}
--- a/src/main/java/net/raphimc/viaproxy/injection/transformer/MovementTrackerTransformer.java
+++ b/src/main/java/net/raphimc/viaproxy/injection/transformer/MovementTrackerTransformer.java
@ -0,0 +1,13 @@
+package net.raphimc.viaproxy.injection.transformer;
+
+import com.viaversion.viaversion.protocols.protocol1_9to1_8.storage.MovementTracker;
+import net.lenni0451.classtransform.annotations.CShadow;
+import net.lenni0451.classtransform.annotations.CTransformer;
+
+@CTransformer(MovementTracker.class)
+public abstract class MovementTrackerTransformer {
+
+    @CShadow
+    private boolean ground = false;
+
+}
--- a/src/main/java/net/raphimc/viaproxy/plugins/PluginManager.java
+++ b/src/main/java/net/raphimc/viaproxy/plugins/PluginManager.java
@ -0,0 +1,64 @@
+package net.raphimc.viaproxy.plugins;
+
+import net.lenni0451.lambdaevents.LambdaManager;
+import net.lenni0451.lambdaevents.generator.LambdaMetaFactoryGenerator;
+import org.yaml.snakeyaml.Yaml;
+
+import java.io.File;
+import java.io.InputStream;
+import java.net.URL;
+import java.net.URLClassLoader;
+import java.util.*;
+
+public class PluginManager {
+
+    public static final LambdaManager EVENT_MANAGER = LambdaManager.threadSafe(new LambdaMetaFactoryGenerator());
+
+    private static final Yaml YAML = new Yaml();
+    private static final File PLUGINS_DIR = new File("plugins");
+    private static final List<ViaProxyPlugin> PLUGINS = new ArrayList<>();
+
+    public static void loadPlugins() {
+        if (!PLUGINS_DIR.exists() || !PLUGINS_DIR.isDirectory()) return;
+
+        File[] files = PLUGINS_DIR.listFiles();
+        if (files == null) return;
+
+        for (File file : files) {
+            if (!file.getName().toLowerCase().endsWith(".jar")) continue;
+            try {
+                loadAndScanJar(file);
+            } catch (Throwable t) {
+                new Exception("Unable to load plugin '" + file.getName() + "'", t).printStackTrace();
+            }
+        }
+    }
+
+    private static void loadAndScanJar(final File file) throws Throwable {
+        URLClassLoader loader = new URLClassLoader(new URL[]{new URL("jar:file:" + file.getAbsolutePath() + "!/")}, PluginManager.class.getClassLoader());
+        InputStream viaproxyYml = loader.getResourceAsStream("viaproxy.yml");
+        if (viaproxyYml == null)
+            throw new IllegalStateException("Plugin '" + file.getName() + "' does not have a viaproxy.yml");
+        Map<String, Object> yaml = YAML.load(viaproxyYml);
+        if (!yaml.containsKey("name"))
+            throw new IllegalStateException("Plugin '" + file.getName() + "' does not have a name attribute in the viaproxy.yml");
+        if (!yaml.containsKey("author"))
+            throw new IllegalStateException("Plugin '" + file.getName() + "' does not have a author attribute in the viaproxy.yml");
+        if (!yaml.containsKey("version"))
+            throw new IllegalStateException("Plugin '" + file.getName() + "' does not have a version attribute in the viaproxy.yml");
+        if (!yaml.containsKey("main"))
+            throw new IllegalStateException("Plugin '" + file.getName() + "' does not have a main attribute in the viaproxy.yml");
+
+        String main = (String) yaml.get("main");
+
+        Class<?> mainClass = loader.loadClass(main);
+        if (!ViaProxyPlugin.class.isAssignableFrom(mainClass))
+            throw new IllegalStateException("Class '" + mainClass.getName() + "' from '" + file.getName() + "' does not extend ViaProxyPlugin");
+        Object instance = mainClass.newInstance();
+        ViaProxyPlugin plugin = (ViaProxyPlugin) instance;
+        PLUGINS.add(plugin);
+
+        plugin.onEnable();
+    }
+
+}
--- a/src/main/java/net/raphimc/viaproxy/plugins/ViaProxyPlugin.java
+++ b/src/main/java/net/raphimc/viaproxy/plugins/ViaProxyPlugin.java
@ -0,0 +1,7 @@
+package net.raphimc.viaproxy.plugins;
+
+public abstract class ViaProxyPlugin {
+
+    public abstract void onEnable();
+
+}
--- a/src/main/java/net/raphimc/viaproxy/plugins/events/Client2ProxyChannelInitializeEvent.java
+++ b/src/main/java/net/raphimc/viaproxy/plugins/events/Client2ProxyChannelInitializeEvent.java
@ -0,0 +1,39 @@
+package net.raphimc.viaproxy.plugins.events;
+
+import io.netty.channel.socket.SocketChannel;
+import net.raphimc.viaproxy.plugins.events.types.ICancellable;
+import net.raphimc.viaproxy.plugins.events.types.ITyped;
+
+public class Client2ProxyChannelInitializeEvent implements ICancellable, ITyped {
+
+    private final Type type;
+    private final SocketChannel channel;
+
+    private boolean cancelled;
+
+    public Client2ProxyChannelInitializeEvent(final Type type, final SocketChannel channel) {
+        this.type = type;
+        this.channel = channel;
+    }
+
+    public SocketChannel getChannel() {
+        return this.channel;
+    }
+
+
+    @Override
+    public boolean isCancelled() {
+        return this.cancelled;
+    }
+
+    @Override
+    public void setCancelled(boolean cancelled) {
+        this.cancelled = cancelled;
+    }
+
+    @Override
+    public Type getType() {
+        return this.type;
+    }
+
+}
--- a/src/main/java/net/raphimc/viaproxy/plugins/events/ConsoleCommandEvent.java
+++ b/src/main/java/net/raphimc/viaproxy/plugins/events/ConsoleCommandEvent.java
@ -0,0 +1,34 @@
+package net.raphimc.viaproxy.plugins.events;
+
+import net.raphimc.viaproxy.plugins.events.types.ICancellable;
+
+public class ConsoleCommandEvent implements ICancellable {
+
+    private final String command;
+    private final String[] args;
+    private boolean cancelled;
+
+    public ConsoleCommandEvent(final String command, final String[] args) {
+        this.command = command;
+        this.args = args;
+    }
+
+    public String getCommand() {
+        return this.command;
+    }
+
+    public String[] getArgs() {
+        return this.args;
+    }
+
+    @Override
+    public void setCancelled(boolean cancelled) {
+        this.cancelled = cancelled;
+    }
+
+    @Override
+    public boolean isCancelled() {
+        return this.cancelled;
+    }
+
+}
--- a/src/main/java/net/raphimc/viaproxy/plugins/events/PreConnectEvent.java
+++ b/src/main/java/net/raphimc/viaproxy/plugins/events/PreConnectEvent.java
@ -0,0 +1,59 @@
+package net.raphimc.viaproxy.plugins.events;
+
+import io.netty.channel.Channel;
+import net.raphimc.netminecraft.util.ServerAddress;
+import net.raphimc.vialegacy.util.VersionEnum;
+import net.raphimc.viaproxy.plugins.events.types.ICancellable;
+
+public class PreConnectEvent implements ICancellable {
+
+    private final ServerAddress serverAddress;
+    private final VersionEnum serverVersion;
+    private final VersionEnum clientVersion;
+    private final Channel clientChannel;
+
+    private boolean cancelled;
+    private String cancelMessage = "§cCould not connect to the backend server! (Server is blacklisted)";
+
+    public PreConnectEvent(final ServerAddress serverAddress, final VersionEnum serverVersion, final VersionEnum clientVersion, final Channel clientChannel) {
+        this.serverAddress = serverAddress;
+        this.serverVersion = serverVersion;
+        this.clientVersion = clientVersion;
+        this.clientChannel = clientChannel;
+    }
+
+    public ServerAddress getServerAddress() {
+        return this.serverAddress;
+    }
+
+    public VersionEnum getServerVersion() {
+        return this.serverVersion;
+    }
+
+    public VersionEnum getClientVersion() {
+        return this.clientVersion;
+    }
+
+    public Channel getClientChannel() {
+        return this.clientChannel;
+    }
+
+    @Override
+    public void setCancelled(boolean cancelled) {
+        this.cancelled = cancelled;
+    }
+
+    @Override
+    public boolean isCancelled() {
+        return this.cancelled;
+    }
+
+    public String getCancelMessage() {
+        return this.cancelMessage;
+    }
+
+    public void setCancelMessage(final String cancelMessage) {
+        this.cancelMessage = cancelMessage;
+    }
+
+}
--- a/src/main/java/net/raphimc/viaproxy/plugins/events/Proxy2ServerChannelInitializeEvent.java
+++ b/src/main/java/net/raphimc/viaproxy/plugins/events/Proxy2ServerChannelInitializeEvent.java
@ -0,0 +1,39 @@
+package net.raphimc.viaproxy.plugins.events;
+
+import io.netty.channel.socket.SocketChannel;
+import net.raphimc.viaproxy.plugins.events.types.ICancellable;
+import net.raphimc.viaproxy.plugins.events.types.ITyped;
+
+public class Proxy2ServerChannelInitializeEvent implements ICancellable, ITyped {
+
+    private final Type type;
+    private final SocketChannel channel;
+
+    private boolean cancelled;
+
+    public Proxy2ServerChannelInitializeEvent(final Type type, final SocketChannel channel) {
+        this.type = type;
+        this.channel = channel;
+    }
+
+    public SocketChannel getChannel() {
+        return this.channel;
+    }
+
+
+    @Override
+    public boolean isCancelled() {
+        return this.cancelled;
+    }
+
+    @Override
+    public void setCancelled(boolean cancelled) {
+        this.cancelled = cancelled;
+    }
+
+    @Override
+    public Type getType() {
+        return this.type;
+    }
+
+}
--- a/src/main/java/net/raphimc/viaproxy/plugins/events/types/ICancellable.java
+++ b/src/main/java/net/raphimc/viaproxy/plugins/events/types/ICancellable.java
@ -0,0 +1,9 @@
+package net.raphimc.viaproxy.plugins.events.types;
+
+public interface ICancellable {
+
+    void setCancelled(final boolean cancelled);
+
+    boolean isCancelled();
+
+}
--- a/src/main/java/net/raphimc/viaproxy/plugins/events/types/ITyped.java
+++ b/src/main/java/net/raphimc/viaproxy/plugins/events/types/ITyped.java
@ -0,0 +1,12 @@
+package net.raphimc.viaproxy.plugins.events.types;
+
+public interface ITyped {
+
+    Type getType();
+
+
+    enum Type {
+        PRE, POST
+    }
+
+}
--- a/src/main/java/net/raphimc/viaproxy/protocolhack/ProtocolHack.java
+++ b/src/main/java/net/raphimc/viaproxy/protocolhack/ProtocolHack.java
@ -0,0 +1,14 @@
+package net.raphimc.viaproxy.protocolhack;
+
+import net.raphimc.viaprotocolhack.ViaProtocolHack;
+import net.raphimc.viaprotocolhack.impl.platform.*;
+import net.raphimc.viaproxy.protocolhack.impl.ViaProxyVPLoader;
+import net.raphimc.viaproxy.protocolhack.impl.ViaProxyViaVersionPlatformImpl;
+
+public class ProtocolHack {
+
+    public static void init() {
+        ViaProtocolHack.init(new ViaProxyViaVersionPlatformImpl(), new ViaProxyVPLoader(), null, null, ViaBackwardsPlatformImpl::new, ViaRewindPlatformImpl::new, ViaLegacyPlatformImpl::new);
+    }
+
+}
--- a/src/main/java/net/raphimc/viaproxy/protocolhack/impl/ViaProxyVPLoader.java
+++ b/src/main/java/net/raphimc/viaproxy/protocolhack/impl/ViaProxyVPLoader.java
@ -0,0 +1,32 @@
+package net.raphimc.viaproxy.protocolhack.impl;
+
+import com.viaversion.viaversion.api.Via;
+import com.viaversion.viaversion.api.protocol.version.VersionProvider;
+import com.viaversion.viaversion.protocols.protocol1_9to1_8.providers.CompressionProvider;
+import com.viaversion.viaversion.protocols.protocol1_9to1_8.providers.HandItemProvider;
+import net.raphimc.vialegacy.protocols.classic.protocola1_0_15toc0_28_30.providers.*;
+import net.raphimc.vialegacy.protocols.release.protocol1_3_1_2to1_2_4_5.providers.OldAuthProvider;
+import net.raphimc.vialegacy.protocols.release.protocol1_7_2_5to1_6_4.providers.EncryptionProvider;
+import net.raphimc.vialegacy.protocols.release.protocol1_8to1_7_6_10.providers.GameProfileFetcher;
+import net.raphimc.viaprotocolhack.impl.viaversion.VPLoader;
+import net.raphimc.viaproxy.protocolhack.providers.*;
+
+public class ViaProxyVPLoader extends VPLoader {
+
+    @Override
+    public void load() {
+        super.load();
+
+        Via.getManager().getProviders().use(CompressionProvider.class, new ViaProxyCompressionProvider());
+        Via.getManager().getProviders().use(HandItemProvider.class, new ViaProxyHandItemProvider());
+        Via.getManager().getProviders().use(VersionProvider.class, new ViaProxyVersionProvider());
+
+        Via.getManager().getProviders().use(GameProfileFetcher.class, new ViaProxyGameProfileFetcher());
+        Via.getManager().getProviders().use(EncryptionProvider.class, new ViaProxyEncryptionProvider());
+        Via.getManager().getProviders().use(OldAuthProvider.class, new ViaProxyOldAuthProvider());
+        Via.getManager().getProviders().use(ClassicWorldHeightProvider.class, new ViaProxyClassicWorldHeightProvider());
+        Via.getManager().getProviders().use(ClassicCustomCommandProvider.class, new ViaProxyClassicCustomCommandProvider());
+        Via.getManager().getProviders().use(ClassicMPPassProvider.class, new ViaProxyClassicMPPassProvider());
+    }
+
+}
--- a/src/main/java/net/raphimc/viaproxy/protocolhack/impl/ViaProxyViaDecodeHandler.java
+++ b/src/main/java/net/raphimc/viaproxy/protocolhack/impl/ViaProxyViaDecodeHandler.java
@ -0,0 +1,30 @@
+package net.raphimc.viaproxy.protocolhack.impl;
+
+import com.viaversion.viaversion.api.connection.UserConnection;
+import com.viaversion.viaversion.exception.CancelCodecException;
+import com.viaversion.viaversion.util.PipelineUtil;
+import io.netty.buffer.ByteBuf;
+import io.netty.channel.ChannelHandlerContext;
+import net.raphimc.viaprotocolhack.netty.ViaDecodeHandler;
+import net.raphimc.viaproxy.util.logging.Logger;
+
+import java.util.List;
+
+public class ViaProxyViaDecodeHandler extends ViaDecodeHandler {
+
+    public ViaProxyViaDecodeHandler(final UserConnection info) {
+        super(info);
+    }
+
+    @Override
+    protected void decode(ChannelHandlerContext ctx, ByteBuf bytebuf, List<Object> out) throws Exception {
+        try {
+            super.decode(ctx, bytebuf, out);
+        } catch (Throwable e) {
+            if (PipelineUtil.containsCause(e, CancelCodecException.class)) throw e;
+            Logger.LOGGER.error("ProtocolHack Packet Error occurred", e);
+            Logger.u_err("ProtocolHack Error", this.user, "Caught unhandled exception: " + e.getClass().getSimpleName());
+        }
+    }
+
+}
--- a/src/main/java/net/raphimc/viaproxy/protocolhack/impl/ViaProxyViaVersionPlatformImpl.java
+++ b/src/main/java/net/raphimc/viaproxy/protocolhack/impl/ViaProxyViaVersionPlatformImpl.java
@ -0,0 +1,19 @@
+package net.raphimc.viaproxy.protocolhack.impl;
+
+import net.raphimc.viaprotocolhack.impl.platform.ViaVersionPlatformImpl;
+import net.raphimc.viaproxy.cli.ConsoleFormatter;
+
+import java.util.UUID;
+
+public class ViaProxyViaVersionPlatformImpl extends ViaVersionPlatformImpl {
+
+    public ViaProxyViaVersionPlatformImpl() {
+        super(null);
+    }
+
+    @Override
+    public void sendMessage(UUID uuid, String msg) {
+        super.sendMessage(uuid, ConsoleFormatter.convert(msg));
+    }
+
+}
--- a/src/main/java/net/raphimc/viaproxy/protocolhack/providers/ViaProxyClassicCustomCommandProvider.java
+++ b/src/main/java/net/raphimc/viaproxy/protocolhack/providers/ViaProxyClassicCustomCommandProvider.java
@ -0,0 +1,41 @@
+package net.raphimc.viaproxy.protocolhack.providers;
+
+import com.viaversion.viaversion.api.connection.UserConnection;
+import net.raphimc.vialegacy.ViaLegacy;
+import net.raphimc.vialegacy.protocols.alpha.protocola1_0_17_1_0_17_4toa1_0_16_2.storage.TimeLockStorage;
+import net.raphimc.vialegacy.protocols.classic.protocola1_0_15toc0_28_30.providers.ClassicCustomCommandProvider;
+
+import java.util.logging.Level;
+
+public class ViaProxyClassicCustomCommandProvider extends ClassicCustomCommandProvider {
+
+    @Override
+    public boolean handleChatMessage(UserConnection user, String message) {
+        try {
+            if (message.startsWith("/")) {
+                message = message.substring(1);
+                final String[] args = message.split(" ");
+                if (args.length <= 0) return super.handleChatMessage(user, message);
+                if (args[0].equals("settime")) {
+                    try {
+                        if (args.length > 1) {
+                            final long time = Long.parseLong(args[1]) % 24_000L;
+                            user.get(TimeLockStorage.class).setTime(time);
+                            this.sendFeedback(user, "§aTime has been set to §6" + time);
+                        } else {
+                            throw new RuntimeException("Invalid usage");
+                        }
+                    } catch (Throwable ignored) {
+                        this.sendFeedback(user, "§cUsage: /settime <Time (Long)>");
+                    }
+                    return true;
+                }
+            }
+        } catch (Throwable e) {
+            ViaLegacy.getPlatform().getLogger().log(Level.WARNING, "Error handling custom classic command", e);
+        }
+
+        return super.handleChatMessage(user, message);
+    }
+
+}
--- a/src/main/java/net/raphimc/viaproxy/protocolhack/providers/ViaProxyClassicMPPassProvider.java
+++ b/src/main/java/net/raphimc/viaproxy/protocolhack/providers/ViaProxyClassicMPPassProvider.java
@ -0,0 +1,46 @@
+package net.raphimc.viaproxy.protocolhack.providers;
+
+import com.google.common.hash.Hashing;
+import com.google.common.io.Resources;
+import com.viaversion.viaversion.api.Via;
+import com.viaversion.viaversion.api.connection.UserConnection;
+import net.raphimc.vialegacy.protocols.classic.protocola1_0_15toc0_28_30.providers.ClassicMPPassProvider;
+import net.raphimc.vialegacy.protocols.release.protocol1_3_1_2to1_2_4_5.providers.OldAuthProvider;
+import net.raphimc.vialegacy.protocols.release.protocol1_7_2_5to1_6_4.storage.HandshakeStorage;
+import net.raphimc.viaproxy.cli.options.Options;
+import net.raphimc.viaproxy.proxy.ProxyConnection;
+
+import java.net.InetAddress;
+import java.net.URL;
+import java.nio.charset.StandardCharsets;
+import java.util.logging.Level;
+
+public class ViaProxyClassicMPPassProvider extends ClassicMPPassProvider {
+
+    @Override
+    public String getMpPass(UserConnection user) {
+        final String mppass = ProxyConnection.fromUserConnection(user).getClassicMpPass();
+        if (mppass != null && !mppass.isEmpty() && !mppass.equals("0")) {
+            return mppass;
+        } else if (Options.BETACRAFT_AUTH) {
+            final HandshakeStorage handshakeStorage = user.get(HandshakeStorage.class);
+            return getBetacraftMpPass(user, user.getProtocolInfo().getUsername(), handshakeStorage.getHostname(), handshakeStorage.getPort());
+        } else {
+            return super.getMpPass(user);
+        }
+    }
+
+    private static String getBetacraftMpPass(final UserConnection user, final String username, final String serverIp, final int port) {
+        try {
+            final String server = InetAddress.getByName(serverIp).getHostAddress() + ":" + port;
+            Via.getManager().getProviders().get(OldAuthProvider.class).sendAuthRequest(user, Hashing.sha1().hashBytes(server.getBytes()).toString());
+            final String mppass = Resources.toString(new URL("http://api.betacraft.uk/getmppass.jsp?user=" + username + "&server=" + server), StandardCharsets.UTF_8);
+            if (mppass.contains("FAILED") || mppass.contains("SERVER NOT FOUND")) return "0";
+            return mppass;
+        } catch (Throwable e) {
+            Via.getPlatform().getLogger().log(Level.WARNING, "An unknown error occurred while authenticating with BetaCraft", e);
+        }
+        return "0";
+    }
+
+}
--- a/src/main/java/net/raphimc/viaproxy/protocolhack/providers/ViaProxyClassicWorldHeightProvider.java
+++ b/src/main/java/net/raphimc/viaproxy/protocolhack/providers/ViaProxyClassicWorldHeightProvider.java
@ -0,0 +1,18 @@
+package net.raphimc.viaproxy.protocolhack.providers;
+
+import com.viaversion.viaversion.api.connection.UserConnection;
+import net.raphimc.vialegacy.protocols.classic.protocola1_0_15toc0_28_30.providers.ClassicWorldHeightProvider;
+import net.raphimc.vialegacy.util.VersionEnum;
+import net.raphimc.viaproxy.proxy.ProxyConnection;
+
+public class ViaProxyClassicWorldHeightProvider extends ClassicWorldHeightProvider {
+
+    @Override
+    public short getMaxChunkSectionCount(UserConnection user) {
+        if (ProxyConnection.fromUserConnection(user).getClientVersion().isNewerThanOrEqualTo(VersionEnum.r1_17)) {
+            return 64;
+        }
+        return 16;
+    }
+
+}
--- a/src/main/java/net/raphimc/viaproxy/protocolhack/providers/ViaProxyCompressionProvider.java
+++ b/src/main/java/net/raphimc/viaproxy/protocolhack/providers/ViaProxyCompressionProvider.java
@ -0,0 +1,17 @@
+package net.raphimc.viaproxy.protocolhack.providers;
+
+import com.viaversion.viaversion.api.connection.UserConnection;
+import com.viaversion.viaversion.protocols.protocol1_9to1_8.providers.CompressionProvider;
+import net.raphimc.netminecraft.constants.MCPipeline;
+
+public class ViaProxyCompressionProvider extends CompressionProvider {
+
+    @Override
+    public void handlePlayCompression(UserConnection user, int threshold) {
+        if (!user.isClientSide()) {
+            throw new IllegalStateException("PLAY state Compression packet is unsupported");
+        }
+        user.getChannel().attr(MCPipeline.COMPRESSION_THRESHOLD_ATTRIBUTE_KEY).set(threshold);
+    }
+
+}
--- a/src/main/java/net/raphimc/viaproxy/protocolhack/providers/ViaProxyEncryptionProvider.java
+++ b/src/main/java/net/raphimc/viaproxy/protocolhack/providers/ViaProxyEncryptionProvider.java
@ -0,0 +1,18 @@
+package net.raphimc.viaproxy.protocolhack.providers;
+
+import com.viaversion.viaversion.api.connection.UserConnection;
+import net.raphimc.vialegacy.protocols.release.protocol1_7_2_5to1_6_4.providers.EncryptionProvider;
+import net.raphimc.viaproxy.proxy.ProxyConnection;
+
+public class ViaProxyEncryptionProvider extends EncryptionProvider {
+
+    @Override
+    public void enableDecryption(UserConnection user) {
+        try {
+            ProxyConnection.fromUserConnection(user).enablePreNettyEncryption();
+        } catch (Throwable e) {
+            throw new RuntimeException(e);
+        }
+    }
+
+}
--- a/src/main/java/net/raphimc/viaproxy/protocolhack/providers/ViaProxyGameProfileFetcher.java
+++ b/src/main/java/net/raphimc/viaproxy/protocolhack/providers/ViaProxyGameProfileFetcher.java
@ -0,0 +1,51 @@
+package net.raphimc.viaproxy.protocolhack.providers;
+
+import com.github.steveice10.mc.auth.exception.profile.ProfileException;
+import com.github.steveice10.mc.auth.exception.profile.ProfileNotFoundException;
+import com.github.steveice10.mc.auth.service.ProfileService;
+import com.github.steveice10.mc.auth.service.SessionService;
+import net.raphimc.vialegacy.protocols.release.protocol1_8to1_7_6_10.model.GameProfile;
+import net.raphimc.vialegacy.protocols.release.protocol1_8to1_7_6_10.providers.GameProfileFetcher;
+
+import java.util.UUID;
+import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.ExecutionException;
+
+public class ViaProxyGameProfileFetcher extends GameProfileFetcher {
+
+    public static SessionService sessionService = new SessionService();
+    public static ProfileService profileService = new ProfileService();
+
+    @Override
+    public UUID loadMojangUUID(String playerName) throws ExecutionException, InterruptedException {
+        final CompletableFuture<com.github.steveice10.mc.auth.data.GameProfile> future = new CompletableFuture<>();
+        profileService.findProfilesByName(new String[]{playerName}, new ProfileService.ProfileLookupCallback() {
+            @Override
+            public void onProfileLookupSucceeded(com.github.steveice10.mc.auth.data.GameProfile profile) {
+                future.complete(profile);
+            }
+
+            @Override
+            public void onProfileLookupFailed(com.github.steveice10.mc.auth.data.GameProfile profile, Exception e) {
+                future.completeExceptionally(e);
+            }
+        });
+        if (!future.isDone()) {
+            future.completeExceptionally(new ProfileNotFoundException());
+        }
+        return future.get().getId();
+    }
+
+    @Override
+    public GameProfile loadGameProfile(UUID uuid) throws ProfileException {
+        final com.github.steveice10.mc.auth.data.GameProfile inProfile = new com.github.steveice10.mc.auth.data.GameProfile(uuid, null);
+        final com.github.steveice10.mc.auth.data.GameProfile mojangProfile = sessionService.fillProfileProperties(inProfile);
+
+        final GameProfile gameProfile = new GameProfile(mojangProfile.getName(), mojangProfile.getId());
+        for (com.github.steveice10.mc.auth.data.GameProfile.Property prop : mojangProfile.getProperties()) {
+            gameProfile.addProperty(new GameProfile.Property(prop.getName(), prop.getValue(), prop.getSignature()));
+        }
+        return gameProfile;
+    }
+
+}
--- a/src/main/java/net/raphimc/viaproxy/protocolhack/providers/ViaProxyHandItemProvider.java
+++ b/src/main/java/net/raphimc/viaproxy/protocolhack/providers/ViaProxyHandItemProvider.java
@ -0,0 +1,14 @@
+package net.raphimc.viaproxy.protocolhack.providers;
+
+import com.viaversion.viaversion.api.connection.UserConnection;
+import com.viaversion.viaversion.api.minecraft.item.Item;
+import com.viaversion.viaversion.protocols.protocol1_9to1_8.providers.HandItemProvider;
+
+public class ViaProxyHandItemProvider extends HandItemProvider {
+
+    @Override
+    public Item getHandItem(final UserConnection info) {
+        return null;
+    }
+
+}
--- a/src/main/java/net/raphimc/viaproxy/protocolhack/providers/ViaProxyOldAuthProvider.java
+++ b/src/main/java/net/raphimc/viaproxy/protocolhack/providers/ViaProxyOldAuthProvider.java
@ -0,0 +1,15 @@
+package net.raphimc.viaproxy.protocolhack.providers;
+
+import com.viaversion.viaversion.api.connection.UserConnection;
+import net.raphimc.vialegacy.protocols.release.protocol1_3_1_2to1_2_4_5.providers.OldAuthProvider;
+import net.raphimc.viaproxy.proxy.CustomPayloadInterface;
+import net.raphimc.viaproxy.proxy.ProxyConnection;
+
+public class ViaProxyOldAuthProvider extends OldAuthProvider {
+
+    @Override
+    public void sendAuthRequest(final UserConnection user, final String serverId) throws Throwable {
+        CustomPayloadInterface.joinServer(serverId, ProxyConnection.fromUserConnection(user));
+    }
+
+}
--- a/src/main/java/net/raphimc/viaproxy/protocolhack/providers/ViaProxyVersionProvider.java
+++ b/src/main/java/net/raphimc/viaproxy/protocolhack/providers/ViaProxyVersionProvider.java
@ -0,0 +1,15 @@
+package net.raphimc.viaproxy.protocolhack.providers;
+
+import com.viaversion.viaversion.api.connection.UserConnection;
+import com.viaversion.viaversion.protocols.base.BaseVersionProvider;
+import net.raphimc.viaproxy.proxy.ProxyConnection;
+
+public class ViaProxyVersionProvider extends BaseVersionProvider {
+
+    @Override
+    public int getClosestServerProtocol(UserConnection connection) throws Exception {
+        if (connection.isClientSide()) return ProxyConnection.fromUserConnection(connection).getServerVersion().getVersion();
+        return super.getClosestServerProtocol(connection);
+    }
+
+}
--- a/src/main/java/net/raphimc/viaproxy/proxy/CustomPayloadInterface.java
+++ b/src/main/java/net/raphimc/viaproxy/proxy/CustomPayloadInterface.java
@ -0,0 +1,66 @@
+package net.raphimc.viaproxy.proxy;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.Unpooled;
+import net.raphimc.netminecraft.packet.PacketTypes;
+import net.raphimc.netminecraft.packet.impl.login.C2SLoginKeyPacket1_19;
+import net.raphimc.viaproxy.cli.options.Options;
+import net.raphimc.viaproxy.util.LocalSocketClient;
+import net.raphimc.viaproxy.util.logging.Logger;
+
+import java.math.BigInteger;
+import java.nio.charset.StandardCharsets;
+import java.util.Base64;
+import java.util.concurrent.*;
+
+public class CustomPayloadInterface {
+
+    public static final String OPENAUTHMOD_BASE_CHANNEL = "oam:";
+    public static final byte[] OPENAUTHMOD_LEGACY_MAGIC_BYTES = new byte[]{2, 20, 12, 3}; // 1.8 - 1.12.2
+    public static final String OPENAUTHMOD_LEGACY_MAGIC_STRING = new String(OPENAUTHMOD_LEGACY_MAGIC_BYTES, StandardCharsets.UTF_8); // 1.8 - 1.12.2
+    public static final int OPENAUTHMOD_LEGACY_MAGIC_INT = new BigInteger(OPENAUTHMOD_LEGACY_MAGIC_BYTES).intValueExact(); // 1.8 - 1.12.2
+
+    // Request
+    public static final String OPENAUTHMOD_JOIN_CHANNEL = OPENAUTHMOD_BASE_CHANNEL + "join"; // 1.8 - latest
+    public static final String OPENAUTHMOD_SIGN_NONCE_CHANNEL = OPENAUTHMOD_BASE_CHANNEL + "sign_nonce"; // 1.19 - latest
+
+    // Response
+    public static final String OPENAUTHMOD_DATA_CHANNEL = OPENAUTHMOD_BASE_CHANNEL + "data"; // 1.8 - latest
+
+    public static void joinServer(final String serverIdHash, final ProxyConnection proxyConnection) throws InterruptedException, ExecutionException {
+        Logger.u_info("auth", proxyConnection.getC2P().remoteAddress(), proxyConnection.getGameProfile(), "Trying to join online mode server");
+        if (Options.OPENAUTHMOD_AUTH) {
+            try {
+                final ByteBuf response = proxyConnection.sendCustomPayload(OPENAUTHMOD_JOIN_CHANNEL, PacketTypes.writeString(Unpooled.buffer(), serverIdHash)).get(6, TimeUnit.SECONDS);
+                if (response == null) throw new TimeoutException();
+                if (response.isReadable() && !response.readBoolean()) throw new TimeoutException();
+            } catch (TimeoutException e) {
+                proxyConnection.kickClient("§cAuthentication cancelled! You need to install OpenAuthMod in order to join this server.");
+            }
+        } else if (Options.LOCAL_SOCKET_AUTH) {
+            new LocalSocketClient(48941).request("authenticate", serverIdHash);
+        }
+    }
+
+    public static void signNonce(final byte[] nonce, final C2SLoginKeyPacket1_19 packet, final ProxyConnection proxyConnection) throws InterruptedException, ExecutionException {
+        Logger.u_info("auth", proxyConnection.getC2P().remoteAddress(), proxyConnection.getGameProfile(), "Requesting nonce signature");
+        if (Options.OPENAUTHMOD_AUTH) {
+            try {
+                final ByteBuf response = proxyConnection.sendCustomPayload(OPENAUTHMOD_SIGN_NONCE_CHANNEL, PacketTypes.writeByteArray(Unpooled.buffer(), nonce)).get(4, TimeUnit.SECONDS);
+                if (response == null) throw new TimeoutException();
+                if (!response.readBoolean()) throw new TimeoutException();
+                packet.salt = response.readLong();
+                packet.signature = PacketTypes.readByteArray(response);
+            } catch (TimeoutException e) {
+                proxyConnection.kickClient("§cAuthentication cancelled! You need to install OpenAuthMod in order to join this server.");
+            }
+        } else if (Options.LOCAL_SOCKET_AUTH) {
+            final String[] response = new LocalSocketClient(48941).request("sign_nonce", Base64.getEncoder().encodeToString(nonce));
+            if (response != null && response[0].equals("success")) {
+                packet.salt = Long.valueOf(response[1]);
+                packet.signature = Base64.getDecoder().decode(response[2]);
+            }
+        }
+    }
+
+}
--- a/src/main/java/net/raphimc/viaproxy/proxy/LoginState.java
+++ b/src/main/java/net/raphimc/viaproxy/proxy/LoginState.java
@ -0,0 +1,9 @@
+package net.raphimc.viaproxy.proxy;
+
+public enum LoginState {
+
+    FIRST_PACKET,
+    SENT_HELLO,
+    SENT_KEY
+
+}
--- a/src/main/java/net/raphimc/viaproxy/proxy/ProxyConnection.java
+++ b/src/main/java/net/raphimc/viaproxy/proxy/ProxyConnection.java
@ -0,0 +1,248 @@
+package net.raphimc.viaproxy.proxy;
+
+import com.github.steveice10.mc.auth.data.GameProfile;
+import com.viaversion.viaversion.api.connection.UserConnection;
+import com.viaversion.viaversion.libs.gson.JsonObject;
+import com.viaversion.viaversion.libs.gson.JsonPrimitive;
+import io.netty.bootstrap.Bootstrap;
+import io.netty.buffer.*;
+import io.netty.channel.*;
+import io.netty.channel.socket.SocketChannel;
+import io.netty.util.AttributeKey;
+import net.raphimc.netminecraft.constants.*;
+import net.raphimc.netminecraft.netty.connection.NetClient;
+import net.raphimc.netminecraft.netty.crypto.AESEncryption;
+import net.raphimc.netminecraft.packet.PacketTypes;
+import net.raphimc.netminecraft.packet.impl.login.*;
+import net.raphimc.netminecraft.packet.impl.status.S2CStatusResponsePacket;
+import net.raphimc.netminecraft.packet.registry.PacketRegistryUtil;
+import net.raphimc.netminecraft.util.ServerAddress;
+import net.raphimc.vialegacy.util.VersionEnum;
+import net.raphimc.viaproxy.proxy.util.CloseAndReturn;
+import net.raphimc.viaproxy.util.logging.Logger;
+
+import java.security.GeneralSecurityException;
+import java.security.Key;
+import java.util.Base64;
+import java.util.Map;
+import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.atomic.AtomicInteger;
+import java.util.function.Function;
+import java.util.function.Supplier;
+
+public class ProxyConnection extends NetClient {
+
+    public static final AttributeKey<ProxyConnection> PROXY_CONNECTION_ATTRIBUTE_KEY = AttributeKey.valueOf("proxy_connection");
+
+    private final SocketChannel c2p;
+    private final AtomicInteger customPayloadId = new AtomicInteger(0);
+    private final Map<Integer, CompletableFuture<ByteBuf>> customPayloadListener = new ConcurrentHashMap<>();
+
+    private ServerAddress serverAddress;
+    private VersionEnum serverVersion;
+
+    private VersionEnum clientVersion;
+    private GameProfile gameProfile;
+    private C2SLoginHelloPacket1_7 loginHelloPacket;
+    private UserConnection userConnection;
+    private ConnectionState connectionState = ConnectionState.HANDSHAKING;
+
+    private Key storedSecretKey;
+    private String classicMpPass;
+
+    public ProxyConnection(final Supplier<ChannelHandler> handlerSupplier, final Function<Supplier<ChannelHandler>, ChannelInitializer<SocketChannel>> channelInitializerSupplier, final SocketChannel c2p) {
+        super(handlerSupplier, channelInitializerSupplier);
+        this.c2p = c2p;
+    }
+
+    public static ProxyConnection fromChannel(final Channel channel) {
+        return channel.attr(PROXY_CONNECTION_ATTRIBUTE_KEY).get();
+    }
+
+    public static ProxyConnection fromUserConnection(final UserConnection userConnection) {
+        return fromChannel(userConnection.getChannel());
+    }
+
+    @Override
+    @Deprecated
+    public void connect(final ServerAddress serverAddress) {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public void initialize(final Bootstrap bootstrap) {
+        bootstrap.option(ChannelOption.CONNECT_TIMEOUT_MILLIS, 4_000);
+        bootstrap.attr(ProxyConnection.PROXY_CONNECTION_ATTRIBUTE_KEY, this);
+        super.initialize(bootstrap);
+    }
+
+    public void connectToServer(final ServerAddress serverAddress, final VersionEnum targetVersion) {
+        this.serverAddress = serverAddress;
+        this.serverVersion = targetVersion;
+        super.connect(serverAddress);
+    }
+
+    public SocketChannel getC2P() {
+        return this.c2p;
+    }
+
+    public ServerAddress getServerAddress() {
+        return this.serverAddress;
+    }
+
+    public VersionEnum getServerVersion() {
+        return this.serverVersion;
+    }
+
+    public void setKeyForPreNettyEncryption(Key key) {
+        this.storedSecretKey = key;
+    }
+
+    public void enablePreNettyEncryption() throws GeneralSecurityException {
+        this.getChannel().attr(MCPipeline.ENCRYPTION_ATTRIBUTE_KEY).set(new AESEncryption(this.storedSecretKey));
+    }
+
+    public void setClientVersion(VersionEnum clientVersion) {
+        this.clientVersion = clientVersion;
+    }
+
+    public VersionEnum getClientVersion() {
+        return this.clientVersion;
+    }
+
+    public void setGameProfile(GameProfile gameProfile) {
+        this.gameProfile = gameProfile;
+    }
+
+    public GameProfile getGameProfile() {
+        return this.gameProfile;
+    }
+
+    public void setLoginHelloPacket(final C2SLoginHelloPacket1_7 loginHelloPacket) {
+        this.loginHelloPacket = loginHelloPacket;
+    }
+
+    public C2SLoginHelloPacket1_7 getLoginHelloPacket() {
+        return this.loginHelloPacket;
+    }
+
+    public void setUserConnection(UserConnection userConnection) {
+        this.userConnection = userConnection;
+    }
+
+    public UserConnection getUserConnection() {
+        return this.userConnection;
+    }
+
+    public void setConnectionState(ConnectionState connectionState) {
+        this.connectionState = connectionState;
+        switch (this.connectionState) {
+            case HANDSHAKING:
+                if (this.getChannel() != null)
+                    this.getChannel().attr(MCPipeline.PACKET_REGISTRY_ATTRIBUTE_KEY).set(PacketRegistryUtil.getHandshakeRegistry(true));
+                this.c2p.attr(MCPipeline.PACKET_REGISTRY_ATTRIBUTE_KEY).set(PacketRegistryUtil.getHandshakeRegistry(false));
+                break;
+            case STATUS:
+                if (this.getChannel() != null)
+                    this.getChannel().attr(MCPipeline.PACKET_REGISTRY_ATTRIBUTE_KEY).set(PacketRegistryUtil.getStatusRegistry(true));
+                this.c2p.attr(MCPipeline.PACKET_REGISTRY_ATTRIBUTE_KEY).set(PacketRegistryUtil.getStatusRegistry(false));
+                break;
+            case LOGIN:
+                if (this.getChannel() != null)
+                    this.getChannel().attr(MCPipeline.PACKET_REGISTRY_ATTRIBUTE_KEY).set(PacketRegistryUtil.getLoginRegistry(true, this.clientVersion.getVersion()));
+                this.c2p.attr(MCPipeline.PACKET_REGISTRY_ATTRIBUTE_KEY).set(PacketRegistryUtil.getLoginRegistry(false, this.clientVersion.getVersion()));
+                break;
+            case PLAY:
+                if (this.getChannel() != null)
+                    this.getChannel().attr(MCPipeline.PACKET_REGISTRY_ATTRIBUTE_KEY).set(PacketRegistryUtil.getPlayRegistry(true, this.clientVersion.getVersion()));
+                this.c2p.attr(MCPipeline.PACKET_REGISTRY_ATTRIBUTE_KEY).set(PacketRegistryUtil.getPlayRegistry(false, this.clientVersion.getVersion()));
+                break;
+        }
+    }
+
+    public ConnectionState getConnectionState() {
+        return this.connectionState;
+    }
+
+    public CompletableFuture<ByteBuf> sendCustomPayload(final String channel, final ByteBuf data) {
+        if (channel.length() > 20) throw new IllegalStateException("Channel name can't be longer than 20 characters");
+        final CompletableFuture<ByteBuf> future = new CompletableFuture<>();
+        final int id = this.customPayloadId.getAndIncrement();
+
+        switch (this.connectionState) {
+            case LOGIN:
+                if (this.clientVersion.isNewerThanOrEqualTo(VersionEnum.r1_13)) {
+                    this.c2p.writeAndFlush(new S2CLoginCustomPayloadPacket(id, channel, PacketTypes.readReadableBytes(data))).addListener(ChannelFutureListener.FIRE_EXCEPTION_ON_FAILURE);
+                } else {
+                    final ByteBuf disconnectPacketData = Unpooled.buffer();
+                    PacketTypes.writeString(disconnectPacketData, channel);
+                    PacketTypes.writeVarInt(disconnectPacketData, id);
+                    disconnectPacketData.writeBytes(data);
+                    this.c2p.writeAndFlush(new S2CLoginDisconnectPacket(messageToJson("§cYou need to install OpenAuthMod in order to join this server.§k\n" + Base64.getEncoder().encodeToString(ByteBufUtil.getBytes(disconnectPacketData)) + "\n" + CustomPayloadInterface.OPENAUTHMOD_LEGACY_MAGIC_STRING))).addListener(ChannelFutureListener.FIRE_EXCEPTION_ON_FAILURE);
+                }
+                break;
+            case PLAY:
+                final ByteBuf customPayloadPacket = Unpooled.buffer();
+                PacketTypes.writeVarInt(customPayloadPacket, MCPackets.S2C_PLUGIN_MESSAGE.getId(this.clientVersion.getVersion()));
+                PacketTypes.writeString(customPayloadPacket, channel); // channel
+                PacketTypes.writeVarInt(customPayloadPacket, id);
+                customPayloadPacket.writeBytes(data);
+                this.c2p.writeAndFlush(customPayloadPacket).addListener(ChannelFutureListener.FIRE_EXCEPTION_ON_FAILURE);
+                break;
+            default:
+                throw new IllegalStateException("Can't send a custom payload packet during " + this.connectionState);
+        }
+
+        this.customPayloadListener.put(id, future);
+        return future;
+    }
+
+    public boolean handleCustomPayload(final int id, final ByteBuf data) {
+        if (this.customPayloadListener.containsKey(id)) {
+            this.customPayloadListener.remove(id).complete(data);
+            return true;
+        }
+        return false;
+    }
+
+    public void setClassicMpPass(final String classicMpPass) {
+        this.classicMpPass = classicMpPass;
+    }
+
+    public String getClassicMpPass() {
+        return this.classicMpPass;
+    }
+
+    public void kickClient(final String message) throws InterruptedException, CloseAndReturn {
+        Logger.u_err("kick", this.c2p.remoteAddress(), this.getGameProfile(), message.replaceAll("§.", ""));
+
+        final ChannelFuture future;
+        if (this.connectionState == ConnectionState.LOGIN) {
+            future = this.c2p.writeAndFlush(new S2CLoginDisconnectPacket(messageToJson(message)));
+        } else if (this.connectionState == ConnectionState.PLAY) {
+            final ByteBuf disconnectPacket = Unpooled.buffer();
+            PacketTypes.writeVarInt(disconnectPacket, MCPackets.S2C_DISCONNECT.getId(this.clientVersion.getVersion()));
+            PacketTypes.writeString(disconnectPacket, messageToJson(message));
+            future = this.c2p.writeAndFlush(disconnectPacket);
+        } else if (this.connectionState == ConnectionState.STATUS) {
+            future = this.c2p.writeAndFlush(new S2CStatusResponsePacket("{\"players\":{\"max\":0,\"online\":0},\"description\":" + new JsonPrimitive(message) + ",\"version\":{\"protocol\":-1,\"name\":\"ViaProxy\"}}"));
+        } else {
+            future = this.c2p.newSucceededFuture();
+        }
+
+        future.await().channel().close();
+        throw CloseAndReturn.INSTANCE;
+    }
+
+    public boolean isClosed() {
+        return !this.c2p.isOpen() || (this.getChannel() != null && !this.getChannel().isOpen());
+    }
+
+    private static String messageToJson(final String message) {
+        final JsonObject obj = new JsonObject();
+        obj.addProperty("text", message);
+        return obj.toString();
+    }
+
+}
--- a/src/main/java/net/raphimc/viaproxy/proxy/client2proxy/Client2ProxyChannelInitializer.java
+++ b/src/main/java/net/raphimc/viaproxy/proxy/client2proxy/Client2ProxyChannelInitializer.java
@ -0,0 +1,35 @@
+package net.raphimc.viaproxy.proxy.client2proxy;
+
+import io.netty.channel.ChannelHandler;
+import io.netty.channel.socket.SocketChannel;
+import net.raphimc.netminecraft.constants.MCPipeline;
+import net.raphimc.netminecraft.netty.connection.MinecraftChannelInitializer;
+import net.raphimc.netminecraft.packet.registry.PacketRegistryUtil;
+import net.raphimc.viaproxy.plugins.PluginManager;
+import net.raphimc.viaproxy.plugins.events.Client2ProxyChannelInitializeEvent;
+import net.raphimc.viaproxy.plugins.events.types.ITyped;
+
+import java.util.function.Supplier;
+
+public class Client2ProxyChannelInitializer extends MinecraftChannelInitializer {
+
+    public Client2ProxyChannelInitializer(final Supplier<ChannelHandler> handlerSupplier) {
+        super(handlerSupplier);
+    }
+
+    @Override
+    protected void initChannel(SocketChannel socketChannel) {
+        if (PluginManager.EVENT_MANAGER.call(new Client2ProxyChannelInitializeEvent(ITyped.Type.PRE, socketChannel)).isCancelled()) {
+            socketChannel.close();
+            return;
+        }
+
+        super.initChannel(socketChannel);
+        socketChannel.attr(MCPipeline.PACKET_REGISTRY_ATTRIBUTE_KEY).set(PacketRegistryUtil.getHandshakeRegistry(false));
+
+        if (PluginManager.EVENT_MANAGER.call(new Client2ProxyChannelInitializeEvent(ITyped.Type.POST, socketChannel)).isCancelled()) {
+            socketChannel.close();
+        }
+    }
+
+}
--- a/src/main/java/net/raphimc/viaproxy/proxy/client2proxy/Client2ProxyHandler.java
+++ b/src/main/java/net/raphimc/viaproxy/proxy/client2proxy/Client2ProxyHandler.java
@ -0,0 +1,292 @@
+package net.raphimc.viaproxy.proxy.client2proxy;
+
+import com.github.steveice10.mc.auth.data.GameProfile;
+import com.github.steveice10.mc.auth.util.UUIDSerializer;
+import com.viaversion.viaversion.api.protocol.version.ProtocolVersion;
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.Unpooled;
+import io.netty.channel.*;
+import io.netty.channel.socket.SocketChannel;
+import net.raphimc.netminecraft.constants.*;
+import net.raphimc.netminecraft.netty.crypto.AESEncryption;
+import net.raphimc.netminecraft.netty.crypto.CryptUtil;
+import net.raphimc.netminecraft.packet.*;
+import net.raphimc.netminecraft.packet.impl.handshake.C2SHandshakePacket;
+import net.raphimc.netminecraft.packet.impl.login.*;
+import net.raphimc.netminecraft.util.ServerAddress;
+import net.raphimc.vialegacy.util.VersionEnum;
+import net.raphimc.viaproxy.ViaProxy;
+import net.raphimc.viaproxy.cli.options.Options;
+import net.raphimc.viaproxy.plugins.PluginManager;
+import net.raphimc.viaproxy.plugins.events.PreConnectEvent;
+import net.raphimc.viaproxy.protocolhack.providers.ViaProxyGameProfileFetcher;
+import net.raphimc.viaproxy.proxy.*;
+import net.raphimc.viaproxy.proxy.proxy2server.Proxy2ServerChannelInitializer;
+import net.raphimc.viaproxy.proxy.proxy2server.Proxy2ServerHandler;
+import net.raphimc.viaproxy.proxy.util.CloseAndReturn;
+import net.raphimc.viaproxy.proxy.util.ExceptionUtil;
+import net.raphimc.viaproxy.util.ArrayHelper;
+import net.raphimc.viaproxy.util.LocalSocketClient;
+import net.raphimc.viaproxy.util.logging.Logger;
+
+import javax.crypto.SecretKey;
+import java.math.BigInteger;
+import java.nio.charset.StandardCharsets;
+import java.security.*;
+import java.security.spec.InvalidKeySpecException;
+import java.security.spec.X509EncodedKeySpec;
+import java.time.Instant;
+import java.util.*;
+import java.util.regex.Pattern;
+
+public class Client2ProxyHandler extends SimpleChannelInboundHandler<IPacket> {
+
+    private static final KeyPair KEY_PAIR;
+    private static final Random RANDOM = new Random();
+
+    static {
+        if (Options.ONLINE_MODE) {
+            KEY_PAIR = CryptUtil.generateKeyPair();
+        } else {
+            KEY_PAIR = null;
+        }
+    }
+
+    private ProxyConnection proxyConnection;
+    private LoginState loginState = LoginState.FIRST_PACKET;
+
+    private final byte[] verifyToken = new byte[4];
+    private int customPayloadPacketId = -1;
+    private int chatSessionUpdatePacketId = -1;
+
+    @Override
+    public void channelActive(ChannelHandlerContext ctx) throws Exception {
+        super.channelActive(ctx);
+
+        if (Options.ONLINE_MODE) RANDOM.nextBytes(this.verifyToken);
+        this.proxyConnection = new ProxyConnection(Proxy2ServerHandler::new, Proxy2ServerChannelInitializer::new, (SocketChannel) ctx.channel());
+        ctx.channel().attr(ProxyConnection.PROXY_CONNECTION_ATTRIBUTE_KEY).set(this.proxyConnection);
+
+        ViaProxy.c2pChannels.add(ctx.channel());
+    }
+
+    @Override
+    public void channelInactive(ChannelHandlerContext ctx) throws Exception {
+        super.channelInactive(ctx);
+
+        try {
+            this.proxyConnection.getChannel().close();
+        } catch (Throwable ignored) {
+        }
+    }
+
+    @Override
+    protected void channelRead0(ChannelHandlerContext ctx, IPacket packet) throws Exception {
+        if (this.proxyConnection.isClosed()) return;
+
+        switch (this.proxyConnection.getConnectionState()) {
+            case HANDSHAKING:
+                if (packet instanceof C2SHandshakePacket) this.handleHandshake((C2SHandshakePacket) packet);
+                else break;
+
+                return;
+            case LOGIN:
+                if (packet instanceof C2SLoginHelloPacket1_7) this.handleLoginHello((C2SLoginHelloPacket1_7) packet);
+                else if (packet instanceof C2SLoginKeyPacket1_7) this.handleLoginKey((C2SLoginKeyPacket1_7) packet);
+                else if (packet instanceof C2SLoginCustomPayloadPacket) this.handleLoginCustomPayload((C2SLoginCustomPayloadPacket) packet);
+                else break;
+
+                return;
+            case PLAY:
+                final UnknownPacket unknownPacket = (UnknownPacket) packet;
+                if (unknownPacket.packetId == this.customPayloadPacketId) {
+                    if (this.handlePlayCustomPayload(Unpooled.wrappedBuffer(unknownPacket.data))) return;
+                } else if (unknownPacket.packetId == this.chatSessionUpdatePacketId && this.proxyConnection.getChannel().attr(MCPipeline.ENCRYPTION_ATTRIBUTE_KEY).get() == null) {
+                    return;
+                }
+                break;
+        }
+
+        this.proxyConnection.getChannel().writeAndFlush(packet).addListener(ChannelFutureListener.FIRE_EXCEPTION_ON_FAILURE);
+    }
+
+    @Override
+    public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) {
+        ExceptionUtil.handleNettyException(ctx, cause, this.proxyConnection);
+    }
+
+    private void handleHandshake(final C2SHandshakePacket packet) throws InterruptedException {
+        String address = packet.address.split("\0")[0];
+        final VersionEnum clientVersion = VersionEnum.fromProtocolVersion(ProtocolVersion.getProtocol(packet.protocolVersion));
+
+        if (ConnectionState.LOGIN.equals(packet.intendedState)) {
+            if (clientVersion == VersionEnum.UNKNOWN) throw CloseAndReturn.INSTANCE;
+        } else if (!ConnectionState.STATUS.equals(packet.intendedState)) {
+            throw CloseAndReturn.INSTANCE;
+        }
+        this.proxyConnection.setClientVersion(clientVersion);
+        this.proxyConnection.setConnectionState(packet.intendedState);
+
+        this.customPayloadPacketId = MCPackets.C2S_PLUGIN_MESSAGE.getId(clientVersion.getVersion());
+        this.chatSessionUpdatePacketId = MCPackets.C2S_CHAT_SESSION_UPDATE.getId(clientVersion.getVersion());
+
+        String connectIP = Options.CONNECT_ADDRESS;
+        int connectPort = Options.CONNECT_PORT;
+        VersionEnum serverVersion = Options.PROTOCOL_VERSION;
+
+        if (Options.INTERNAL_SRV_MODE) {
+            final ArrayHelper arrayHelper = ArrayHelper.instanceOf(address.split("\7"));
+            connectIP = arrayHelper.get(0);
+            connectPort = arrayHelper.getInteger(1);
+            final String versionString = arrayHelper.get(2);
+            if (arrayHelper.isIndexValid(3)) {
+                this.proxyConnection.setClassicMpPass(arrayHelper.getString(3));
+            }
+            for (VersionEnum v : VersionEnum.getAllVersions()) {
+                if (v.getName().equalsIgnoreCase(versionString)) {
+                    serverVersion = v;
+                    break;
+                }
+            }
+            if (serverVersion == null) throw CloseAndReturn.INSTANCE;
+        } else if (Options.SRV_MODE) {
+            try {
+                if (address.toLowerCase().contains(".viaproxy.")) {
+                    address = address.substring(0, address.toLowerCase().lastIndexOf(".viaproxy."));
+                } else {
+                    throw CloseAndReturn.INSTANCE;
+                }
+                final ArrayHelper arrayHelper = ArrayHelper.instanceOf(address.split(Pattern.quote("_")));
+                if (arrayHelper.getLength() < 3) {
+                    throw CloseAndReturn.INSTANCE;
+                }
+                connectIP = arrayHelper.getAsString(0, arrayHelper.getLength() - 3, "_");
+                connectPort = arrayHelper.getInteger(arrayHelper.getLength() - 2);
+                final String versionString = arrayHelper.get(arrayHelper.getLength() - 1);
+                for (VersionEnum v : VersionEnum.getAllVersions()) {
+                    if (v.getName().replace(" ", "-").equalsIgnoreCase(versionString)) {
+                        serverVersion = v;
+                        break;
+                    }
+                }
+                if (serverVersion == null) throw CloseAndReturn.INSTANCE;
+            } catch (CloseAndReturn e) {
+                this.proxyConnection.kickClient("§cWrong SRV syntax! §6Please use:\n§7ip_port_version.viaproxy.hostname");
+            }
+        }
+
+        final ServerAddress serverAddress;
+        if (serverVersion.isOlderThan(VersionEnum.r1_3_1tor1_3_2)) {
+            serverAddress = new ServerAddress(connectIP, connectPort);
+        } else {
+            serverAddress = ServerAddress.fromSRV(connectIP + ":" + connectPort);
+        }
+
+        final PreConnectEvent preConnectEvent = new PreConnectEvent(serverAddress, serverVersion, clientVersion, this.proxyConnection.getC2P());
+        if (PluginManager.EVENT_MANAGER.call(preConnectEvent).isCancelled()) {
+            this.proxyConnection.kickClient(preConnectEvent.getCancelMessage());
+        }
+
+        Logger.u_info("connect", this.proxyConnection.getC2P().remoteAddress(), this.proxyConnection.getGameProfile(), "[" + clientVersion.getName() + " <-> " + serverVersion.getName() + "] Connecting to " + serverAddress.getAddress() + ":" + serverAddress.getPort());
+        try {
+            this.proxyConnection.connectToServer(serverAddress, serverVersion);
+            this.proxyConnection.getChannel().writeAndFlush(new C2SHandshakePacket(clientVersion.getOriginalVersion(), serverAddress.getAddress(), serverAddress.getPort(), packet.intendedState)).await().addListener(ChannelFutureListener.FIRE_EXCEPTION_ON_FAILURE);
+            this.proxyConnection.setConnectionState(packet.intendedState);
+        } catch (Throwable e) {
+            this.proxyConnection.kickClient("§cCould not connect to the backend server!\n§cTry again in a few seconds.");
+        }
+    }
+
+    private void handleLoginHello(C2SLoginHelloPacket1_7 packet) throws NoSuchAlgorithmException, InvalidKeySpecException {
+        if (this.loginState != LoginState.FIRST_PACKET) throw CloseAndReturn.INSTANCE;
+        this.loginState = LoginState.SENT_HELLO;
+
+        if (packet instanceof C2SLoginHelloPacket1_19) {
+            final C2SLoginHelloPacket1_19 packet1_19 = (C2SLoginHelloPacket1_19) packet;
+            if (packet1_19.expiresAt != null && packet1_19.expiresAt.isBefore(Instant.now())) {
+                throw new IllegalStateException("Expired public key");
+            }
+        }
+
+        this.proxyConnection.setLoginHelloPacket(packet);
+        this.proxyConnection.setGameProfile(new GameProfile((UUID) null, packet.name));
+
+        if (Options.ONLINE_MODE) {
+            this.proxyConnection.getC2P().writeAndFlush(new S2CLoginKeyPacket1_8("", KEY_PAIR.getPublic().getEncoded(), this.verifyToken)).addListener(ChannelFutureListener.FIRE_EXCEPTION_ON_FAILURE);
+        } else {
+            if (Options.LOCAL_SOCKET_AUTH) {
+                String[] response = new LocalSocketClient(48941).request("getusername");
+                if (response != null && response[0].equals("success")) {
+                    this.proxyConnection.setGameProfile(new GameProfile((UUID) null, response[1]));
+                }
+                response = new LocalSocketClient(48941).request("get_public_key_data");
+                if (response != null && response[0].equals("success")) {
+                    final UUID uuid = UUIDSerializer.fromString(response[1].replaceFirst("(\\p{XDigit}{8})(\\p{XDigit}{4})(\\p{XDigit}{4})(\\p{XDigit}{4})(\\p{XDigit}+)", "$1-$2-$3-$4-$5"));
+                    final PublicKey publicKey = KeyFactory.getInstance("RSA").generatePublic(new X509EncodedKeySpec(Base64.getDecoder().decode(response[2])));
+                    packet = new C2SLoginHelloPacket1_19_3(packet.name, Instant.ofEpochMilli(Long.parseLong(response[4])), publicKey, Base64.getDecoder().decode(response[3]), uuid);
+                }
+            }
+
+            this.proxyConnection.getChannel().writeAndFlush(packet).addListener(ChannelFutureListener.FIRE_EXCEPTION_ON_FAILURE);
+        }
+    }
+
+    private void handleLoginKey(final C2SLoginKeyPacket1_7 packet) throws GeneralSecurityException, InterruptedException {
+        if (this.proxyConnection.getClientVersion().isOlderThanOrEqualTo(VersionEnum.r1_12_2) && new String(packet.encryptedNonce, StandardCharsets.UTF_8).equals(CustomPayloadInterface.OPENAUTHMOD_DATA_CHANNEL)) { // 1.8-1.12.2 OpenAuthMod response handling
+            final ByteBuf byteBuf = Unpooled.wrappedBuffer(packet.encryptedSecretKey);
+            this.proxyConnection.handleCustomPayload(PacketTypes.readVarInt(byteBuf), byteBuf);
+            return;
+        }
+
+        if (this.loginState != LoginState.SENT_HELLO) throw CloseAndReturn.INSTANCE;
+        this.loginState = LoginState.SENT_KEY;
+
+        if (packet.encryptedNonce != null) {
+            if (!Arrays.equals(this.verifyToken, CryptUtil.decryptData(KEY_PAIR.getPrivate(), packet.encryptedNonce))) {
+                Logger.u_err("auth", this.proxyConnection.getC2P().remoteAddress(), this.proxyConnection.getGameProfile(), "Invalid verify token");
+                this.proxyConnection.kickClient("§cInvalid verify token!");
+            }
+        } else {
+            final C2SLoginKeyPacket1_19 keyPacket = (C2SLoginKeyPacket1_19) packet;
+            final C2SLoginHelloPacket1_19 helloPacket = (C2SLoginHelloPacket1_19) this.proxyConnection.getLoginHelloPacket();
+            if (helloPacket.key == null || !CryptUtil.verifySignedNonce(helloPacket.key, this.verifyToken, keyPacket.salt, keyPacket.signature)) {
+                Logger.u_err("auth", this.proxyConnection.getC2P().remoteAddress(), this.proxyConnection.getGameProfile(), "Invalid verify token");
+                this.proxyConnection.kickClient("§cInvalid verify token!");
+            }
+        }
+
+        final SecretKey secretKey = CryptUtil.decryptSecretKey(KEY_PAIR.getPrivate(), packet.encryptedSecretKey);
+        this.proxyConnection.getC2P().attr(MCPipeline.ENCRYPTION_ATTRIBUTE_KEY).set(new AESEncryption(secretKey));
+
+        final String userName = this.proxyConnection.getGameProfile().getName();
+
+        try {
+            final String serverHash = new BigInteger(CryptUtil.computeServerIdHash("", KEY_PAIR.getPublic(), secretKey)).toString(16);
+            this.proxyConnection.setGameProfile(ViaProxyGameProfileFetcher.sessionService.getProfileByServer(userName, serverHash));
+            if (this.proxyConnection.getGameProfile() == null) {
+                Logger.u_err("auth", this.proxyConnection.getC2P().remoteAddress(), this.proxyConnection.getGameProfile(), "Invalid session");
+                this.proxyConnection.kickClient("§cInvalid session! Please restart minecraft (and the launcher) and try again.");
+            }
+            Logger.u_info("auth", this.proxyConnection.getC2P().remoteAddress(), this.proxyConnection.getGameProfile(), "Authenticated as " + this.proxyConnection.getGameProfile().getIdAsString());
+        } catch (Throwable e) {
+            throw new RuntimeException("Failed to make session request for user '" + userName + "'!", e);
+        }
+
+        this.proxyConnection.getChannel().writeAndFlush(this.proxyConnection.getLoginHelloPacket()).addListener(ChannelFutureListener.FIRE_EXCEPTION_ON_FAILURE);
+    }
+
+    private void handleLoginCustomPayload(final C2SLoginCustomPayloadPacket packet) {
+        if (packet.response == null || !this.proxyConnection.handleCustomPayload(packet.queryId, Unpooled.wrappedBuffer(packet.response))) {
+            this.proxyConnection.getChannel().writeAndFlush(packet).addListener(ChannelFutureListener.FIRE_EXCEPTION_ON_FAILURE);
+        }
+    }
+
+    private boolean handlePlayCustomPayload(final ByteBuf packet) {
+        final String channel = PacketTypes.readString(packet, Short.MAX_VALUE); // channel
+        if (channel.equals(CustomPayloadInterface.OPENAUTHMOD_DATA_CHANNEL)) {
+            return this.proxyConnection.handleCustomPayload(PacketTypes.readVarInt(packet), packet);
+        }
+        return false;
+    }
+
+}
--- a/src/main/java/net/raphimc/viaproxy/proxy/proxy2server/Proxy2ServerChannelInitializer.java
+++ b/src/main/java/net/raphimc/viaproxy/proxy/proxy2server/Proxy2ServerChannelInitializer.java
@ -0,0 +1,58 @@
+package net.raphimc.viaproxy.proxy.proxy2server;
+
+import com.viaversion.viaversion.api.connection.UserConnection;
+import com.viaversion.viaversion.connection.UserConnectionImpl;
+import com.viaversion.viaversion.protocol.ProtocolPipelineImpl;
+import io.netty.channel.ChannelHandler;
+import io.netty.channel.socket.SocketChannel;
+import net.raphimc.netminecraft.constants.MCPipeline;
+import net.raphimc.netminecraft.netty.connection.MinecraftChannelInitializer;
+import net.raphimc.netminecraft.packet.registry.PacketRegistryUtil;
+import net.raphimc.vialegacy.netty.PreNettyDecoder;
+import net.raphimc.vialegacy.netty.PreNettyEncoder;
+import net.raphimc.vialegacy.protocols.release.protocol1_7_2_5to1_6_4.baseprotocols.PreNettyBaseProtocol;
+import net.raphimc.vialegacy.util.VersionEnum;
+import net.raphimc.viaprotocolhack.netty.ViaEncodeHandler;
+import net.raphimc.viaprotocolhack.netty.ViaPipeline;
+import net.raphimc.viaproxy.plugins.PluginManager;
+import net.raphimc.viaproxy.plugins.events.Proxy2ServerChannelInitializeEvent;
+import net.raphimc.viaproxy.plugins.events.types.ITyped;
+import net.raphimc.viaproxy.protocolhack.impl.ViaProxyViaDecodeHandler;
+import net.raphimc.viaproxy.proxy.ProxyConnection;
+
+import java.util.function.Supplier;
+
+public class Proxy2ServerChannelInitializer extends MinecraftChannelInitializer {
+
+    public Proxy2ServerChannelInitializer(final Supplier<ChannelHandler> handlerSupplier) {
+        super(handlerSupplier);
+    }
+
+    @Override
+    protected void initChannel(SocketChannel socketChannel) {
+        if (PluginManager.EVENT_MANAGER.call(new Proxy2ServerChannelInitializeEvent(ITyped.Type.PRE, socketChannel)).isCancelled()) {
+            socketChannel.close();
+            return;
+        }
+
+        final UserConnection user = new UserConnectionImpl(socketChannel, true);
+        new ProtocolPipelineImpl(user);
+        ProxyConnection.fromChannel(socketChannel).setUserConnection(user);
+
+        super.initChannel(socketChannel);
+        socketChannel.attr(MCPipeline.PACKET_REGISTRY_ATTRIBUTE_KEY).set(PacketRegistryUtil.getHandshakeRegistry(true));
+        socketChannel.pipeline().addBefore(MCPipeline.PACKET_CODEC_HANDLER_NAME, ViaPipeline.HANDLER_ENCODER_NAME, new ViaEncodeHandler(user));
+        socketChannel.pipeline().addBefore(MCPipeline.PACKET_CODEC_HANDLER_NAME, ViaPipeline.HANDLER_DECODER_NAME, new ViaProxyViaDecodeHandler(user));
+
+        if (ProxyConnection.fromChannel(socketChannel).getServerVersion().isOlderThanOrEqualTo(VersionEnum.r1_6_4)) {
+            user.getProtocolInfo().getPipeline().add(PreNettyBaseProtocol.INSTANCE);
+            socketChannel.pipeline().addBefore(MCPipeline.SIZER_HANDLER_NAME, ViaPipeline.HANDLER_PRE_NETTY_ENCODER_NAME, new PreNettyEncoder(user));
+            socketChannel.pipeline().addBefore(MCPipeline.SIZER_HANDLER_NAME, ViaPipeline.HANDLER_PRE_NETTY_DECODER_NAME, new PreNettyDecoder(user));
+        }
+
+        if (PluginManager.EVENT_MANAGER.call(new Proxy2ServerChannelInitializeEvent(ITyped.Type.POST, socketChannel)).isCancelled()) {
+            socketChannel.close();
+        }
+    }
+
+}
--- a/src/main/java/net/raphimc/viaproxy/proxy/proxy2server/Proxy2ServerHandler.java
+++ b/src/main/java/net/raphimc/viaproxy/proxy/proxy2server/Proxy2ServerHandler.java
@ -0,0 +1,117 @@
+package net.raphimc.viaproxy.proxy.proxy2server;
+
+import com.github.steveice10.mc.auth.data.GameProfile;
+import io.netty.channel.*;
+import net.raphimc.netminecraft.constants.ConnectionState;
+import net.raphimc.netminecraft.constants.MCPipeline;
+import net.raphimc.netminecraft.netty.crypto.AESEncryption;
+import net.raphimc.netminecraft.netty.crypto.CryptUtil;
+import net.raphimc.netminecraft.packet.IPacket;
+import net.raphimc.netminecraft.packet.impl.login.*;
+import net.raphimc.vialegacy.protocols.release.protocol1_7_2_5to1_6_4.storage.ProtocolMetadataStorage;
+import net.raphimc.vialegacy.util.VersionEnum;
+import net.raphimc.viaproxy.cli.options.Options;
+import net.raphimc.viaproxy.proxy.CustomPayloadInterface;
+import net.raphimc.viaproxy.proxy.ProxyConnection;
+import net.raphimc.viaproxy.proxy.util.ExceptionUtil;
+import net.raphimc.viaproxy.util.logging.Logger;
+
+import javax.crypto.SecretKey;
+import java.math.BigInteger;
+import java.security.GeneralSecurityException;
+import java.security.PublicKey;
+import java.util.concurrent.ExecutionException;
+
+public class Proxy2ServerHandler extends SimpleChannelInboundHandler<IPacket> {
+
+    private ProxyConnection proxyConnection;
+
+    @Override
+    public void channelActive(ChannelHandlerContext ctx) throws Exception {
+        super.channelActive(ctx);
+
+        this.proxyConnection = ProxyConnection.fromChannel(ctx.channel());
+    }
+
+    @Override
+    public void channelInactive(ChannelHandlerContext ctx) throws Exception {
+        super.channelInactive(ctx);
+
+        Logger.u_info("disconnect", this.proxyConnection.getC2P().remoteAddress(), this.proxyConnection.getGameProfile(), "Connection closed");
+        try {
+            this.proxyConnection.getC2P().close();
+        } catch (Throwable ignored) {
+        }
+    }
+
+    @Override
+    protected void channelRead0(ChannelHandlerContext ctx, IPacket packet) throws Exception {
+        if (this.proxyConnection.isClosed()) return;
+
+        switch (this.proxyConnection.getConnectionState()) {
+            case LOGIN:
+                if (packet instanceof S2CLoginKeyPacket1_7) this.handleLoginKey((S2CLoginKeyPacket1_7) packet);
+                else if (packet instanceof S2CLoginSuccessPacket1_7) this.handleLoginSuccess((S2CLoginSuccessPacket1_7) packet);
+                else if (packet instanceof S2CLoginCompressionPacket) this.handleLoginCompression((S2CLoginCompressionPacket) packet);
+                else break;
+
+                return;
+        }
+
+        this.proxyConnection.getC2P().writeAndFlush(packet).addListener(ChannelFutureListener.FIRE_EXCEPTION_ON_FAILURE);
+    }
+
+    @Override
+    public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) {
+        ExceptionUtil.handleNettyException(ctx, cause, this.proxyConnection);
+    }
+
+    private void handleLoginKey(final S2CLoginKeyPacket1_7 packet) throws InterruptedException, GeneralSecurityException, ExecutionException {
+        final PublicKey publicKey = CryptUtil.decodeRsaPublicKey(packet.publicKey);
+        final SecretKey secretKey = CryptUtil.generateSecretKey();
+        final String serverHash = new BigInteger(CryptUtil.computeServerIdHash(packet.serverId, publicKey, secretKey)).toString(16);
+
+        boolean auth = true;
+        if (this.proxyConnection.getServerVersion().isOlderThanOrEqualTo(VersionEnum.r1_6_4)) {
+            auth = this.proxyConnection.getUserConnection().get(ProtocolMetadataStorage.class).authenticate;
+        }
+        if (auth) {
+            CustomPayloadInterface.joinServer(serverHash, this.proxyConnection);
+        }
+
+        final byte[] encryptedSecretKey = CryptUtil.encryptData(publicKey, secretKey.getEncoded());
+        final byte[] encryptedNonce = CryptUtil.encryptData(publicKey, packet.nonce);
+
+        final C2SLoginKeyPacket1_19_3 loginKey = new C2SLoginKeyPacket1_19_3(encryptedSecretKey, encryptedNonce);
+        if (this.proxyConnection.getLoginHelloPacket() instanceof C2SLoginHelloPacket1_19 && ((C2SLoginHelloPacket1_19) this.proxyConnection.getLoginHelloPacket()).key != null) {
+            CustomPayloadInterface.signNonce(packet.nonce, loginKey, this.proxyConnection);
+        }
+        this.proxyConnection.getChannel().writeAndFlush(loginKey).addListener(ChannelFutureListener.FIRE_EXCEPTION_ON_FAILURE);
+
+        if (this.proxyConnection.getServerVersion().isNewerThanOrEqualTo(VersionEnum.r1_7_2tor1_7_5)) {
+            this.proxyConnection.getChannel().attr(MCPipeline.ENCRYPTION_ATTRIBUTE_KEY).set(new AESEncryption(secretKey));
+        } else {
+            this.proxyConnection.setKeyForPreNettyEncryption(secretKey);
+        }
+    }
+
+    private void handleLoginSuccess(final S2CLoginSuccessPacket1_7 packet) throws Exception {
+        if (this.proxyConnection.getClientVersion().isNewerThanOrEqualTo(VersionEnum.r1_8)) {
+            if (Options.COMPRESSION_THRESHOLD > -1) {
+                this.proxyConnection.getC2P().writeAndFlush(new S2CLoginCompressionPacket(Options.COMPRESSION_THRESHOLD)).addListener(ChannelFutureListener.FIRE_EXCEPTION_ON_FAILURE).await();
+                this.proxyConnection.getC2P().attr(MCPipeline.COMPRESSION_THRESHOLD_ATTRIBUTE_KEY).set(Options.COMPRESSION_THRESHOLD);
+            }
+        }
+
+        this.proxyConnection.setGameProfile(new GameProfile(packet.uuid, packet.name));
+
+        Logger.u_info("connect", this.proxyConnection.getC2P().remoteAddress(), this.proxyConnection.getGameProfile(), "Connected successfully! Switching to PLAY state");
+        this.proxyConnection.getC2P().writeAndFlush(packet).addListener(ChannelFutureListener.FIRE_EXCEPTION_ON_FAILURE).await();
+        this.proxyConnection.setConnectionState(ConnectionState.PLAY);
+    }
+
+    private void handleLoginCompression(final S2CLoginCompressionPacket packet) {
+        this.proxyConnection.getChannel().attr(MCPipeline.COMPRESSION_THRESHOLD_ATTRIBUTE_KEY).set(packet.compressionThreshold);
+    }
+
+}
--- a/src/main/java/net/raphimc/viaproxy/proxy/util/CloseAndReturn.java
+++ b/src/main/java/net/raphimc/viaproxy/proxy/util/CloseAndReturn.java
@ -0,0 +1,20 @@
+package net.raphimc.viaproxy.proxy.util;
+
+public class CloseAndReturn extends RuntimeException {
+
+    public static final CloseAndReturn INSTANCE = new CloseAndReturn();
+
+    CloseAndReturn() {
+    }
+
+    @Override
+    public String toString() {
+        return "";
+    }
+
+    @Override
+    public synchronized Throwable fillInStackTrace() {
+        return this;
+    }
+
+}
--- a/src/main/java/net/raphimc/viaproxy/proxy/util/ExceptionUtil.java
+++ b/src/main/java/net/raphimc/viaproxy/proxy/util/ExceptionUtil.java
@ -0,0 +1,83 @@
+package net.raphimc.viaproxy.proxy.util;
+
+import com.viaversion.viaversion.exception.InformativeException;
+import io.netty.channel.ChannelHandlerContext;
+import io.netty.handler.codec.EncoderException;
+import net.raphimc.viaproxy.proxy.ProxyConnection;
+import net.raphimc.viaproxy.util.logging.Logger;
+
+import java.io.IOException;
+import java.lang.reflect.Field;
+import java.nio.channels.ClosedChannelException;
+import java.util.Iterator;
+import java.util.Map;
+
+public class ExceptionUtil {
+
+    private static Field infoField;
+
+    static {
+        try {
+            infoField = InformativeException.class.getDeclaredField("info");
+            infoField.setAccessible(true);
+        } catch (Throwable e) {
+            e.printStackTrace();
+        }
+    }
+
+    public static void handleNettyException(ChannelHandlerContext ctx, Throwable cause, ProxyConnection proxyConnection) {
+        if (!ctx.channel().isOpen() || !ctx.channel().isActive()) return;
+        if (cause instanceof ClosedChannelException) return;
+        if (cause instanceof IOException) return;
+        if (cause instanceof CloseAndReturn) {
+            ctx.channel().close();
+            return;
+        }
+        Logger.LOGGER.error("Caught unhandled netty exception", cause);
+        try {
+            proxyConnection.kickClient("§cAn unhandled error occurred in your connection and it has been closed.\n§aError details for report:§f" + ExceptionUtil.prettyPrint(cause));
+        } catch (Throwable ignored) {
+        }
+        ctx.channel().close();
+    }
+
+    public static String prettyPrint(Throwable t) {
+        StringBuilder msg = new StringBuilder();
+        if (t instanceof EncoderException) t = t.getCause();
+        while (t != null) {
+            String exceptionMessage = t.getMessage();
+            if (t instanceof InformativeException) {
+                exceptionMessage = getMessageFor((InformativeException) t);
+            }
+            msg.append("\n");
+            msg.append("§c").append(t.getClass().getSimpleName()).append("§7: §f").append(exceptionMessage);
+            t = t.getCause();
+            if (t != null) {
+                msg.append(" §9Caused by");
+            }
+        }
+        return msg.toString();
+    }
+
+    private static String getMessageFor(final InformativeException e) {
+        Map<String, Object> info = null;
+        try {
+            info = (Map<String, Object>) infoField.get(e);
+        } catch (Throwable ignored) {
+        }
+        if (info != null) {
+            final StringBuilder builder = new StringBuilder();
+            boolean first = true;
+            for (Iterator<Map.Entry<String, Object>> var3 = info.entrySet().iterator(); var3.hasNext(); first = false) {
+                Map.Entry<String, Object> entry = var3.next();
+                if (!first) {
+                    builder.append(", ");
+                }
+                builder.append(entry.getKey()).append(": ").append(entry.getValue());
+            }
+            return builder.toString();
+        }
+        return "Unable to get source info";
+    }
+
+}
--- a/src/main/java/net/raphimc/viaproxy/ui/ViaProxyUI.java
+++ b/src/main/java/net/raphimc/viaproxy/ui/ViaProxyUI.java
@ -0,0 +1,238 @@
+package net.raphimc.viaproxy.ui;
+
+import com.formdev.flatlaf.FlatDarkLaf;
+import com.google.common.net.HostAndPort;
+import net.raphimc.vialegacy.util.VersionEnum;
+import net.raphimc.viaproxy.ViaProxy;
+import net.raphimc.viaproxy.cli.options.Options;
+import net.raphimc.viaproxy.util.logging.Logger;
+
+import javax.swing.*;
+import java.awt.*;
+
+public class ViaProxyUI extends JFrame {
+
+    private final JPanel contentPane = new JPanel();
+
+    private ImageIcon icon;
+
+    private JTextField serverAddress;
+    private JComboBox<VersionEnum> serverVersion;
+    private JSpinner bindPort;
+    private JComboBox<String> authMethod;
+    private JCheckBox betaCraftAuth;
+    private JLabel stateLabel;
+    private JButton stateButton;
+
+    public ViaProxyUI() {
+        this.applyDarkFlatLafTheme();
+        this.loadIcons();
+        this.initWindow();
+        this.initElements();
+
+        Thread.setDefaultUncaughtExceptionHandler((t, e) -> {
+            Logger.LOGGER.error("Caught exception in thread " + t.getName(), e);
+            final StringBuilder builder = new StringBuilder("An error occurred:\n");
+            builder.append("[").append(e.getClass().getSimpleName()).append("] ").append(e.getMessage()).append("\n");
+            for (StackTraceElement element : e.getStackTrace()) {
+                builder.append("\tat ").append(element.toString()).append("\n");
+            }
+            this.showError(builder.toString());
+        });
+
+        SwingUtilities.updateComponentTreeUI(this);
+        this.setVisible(true);
+    }
+
+    private void applyDarkFlatLafTheme() {
+        try {
+            UIManager.setLookAndFeel(new FlatDarkLaf());
+        } catch (Throwable t) {
+            t.printStackTrace();
+        }
+    }
+
+    private void loadIcons() {
+        this.icon = new ImageIcon(this.getClass().getClassLoader().getResource("assets/icons/icon.png"));
+    }
+
+    private void initWindow() {
+        this.setTitle("ViaProxy");
+        this.setIconImage(this.icon.getImage());
+        this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+        this.setSize(500, 370);
+        this.setResizable(false);
+        this.setLocationRelativeTo(null);
+        this.setContentPane(this.contentPane);
+    }
+
+    private void initElements() {
+        this.contentPane.setLayout(null);
+        {
+            JLabel titleLabel = new JLabel("ViaProxy");
+            titleLabel.setBounds(0, 0, 500, 50);
+            titleLabel.setHorizontalAlignment(SwingConstants.CENTER);
+            titleLabel.setFont(titleLabel.getFont().deriveFont(30F));
+            this.contentPane.add(titleLabel);
+        }
+        {
+            JLabel addressLabel = new JLabel("Server Address:");
+            addressLabel.setBounds(10, 50, 100, 20);
+            this.contentPane.add(addressLabel);
+
+            this.serverAddress = new JTextField();
+            this.serverAddress.setBounds(10, 70, 465, 20);
+            this.contentPane.add(this.serverAddress);
+        }
+        {
+            JLabel serverVersionLabel = new JLabel("Server Version:");
+            serverVersionLabel.setBounds(10, 100, 100, 20);
+            this.contentPane.add(serverVersionLabel);
+
+            this.serverVersion = new JComboBox<>(VersionEnum.RENDER_VERSIONS.toArray(new VersionEnum[0]));
+            this.serverVersion.setBounds(10, 120, 465, 20);
+            this.serverVersion.setRenderer(new DefaultListCellRenderer() {
+                @Override
+                public Component getListCellRendererComponent(JList<?> list, Object value, int index, boolean isSelected, boolean cellHasFocus) {
+                    if (value instanceof VersionEnum) {
+                        VersionEnum version = (VersionEnum) value;
+                        value = version.getName();
+                    }
+                    return super.getListCellRendererComponent(list, value, index, isSelected, cellHasFocus);
+                }
+            });
+            this.contentPane.add(this.serverVersion);
+        }
+        {
+            JLabel bindPortLabel = new JLabel("Bind Port:");
+            bindPortLabel.setBounds(10, 150, 100, 20);
+            this.contentPane.add(bindPortLabel);
+
+            this.bindPort = new JSpinner(new SpinnerNumberModel(25568, 1, 65535, 1));
+            this.bindPort.setBounds(10, 170, 465, 20);
+            this.bindPort.setEditor(new JSpinner.NumberEditor(this.bindPort, "#"));
+            ((JSpinner.DefaultEditor) this.bindPort.getEditor()).getTextField().setHorizontalAlignment(SwingConstants.LEFT);
+            this.contentPane.add(this.bindPort);
+        }
+        {
+            JLabel authMethodLabel = new JLabel("Auth Method:");
+            authMethodLabel.setBounds(10, 200, 100, 20);
+            this.contentPane.add(authMethodLabel);
+
+            this.authMethod = new JComboBox<>(new String[]{"OpenAuthMod"});
+            this.authMethod.setBounds(10, 220, 465, 20);
+            this.contentPane.add(this.authMethod);
+        }
+        {
+            this.betaCraftAuth = new JCheckBox("BetaCraft Auth (Classic)");
+            this.betaCraftAuth.setBounds(10, 250, 465, 20);
+            this.contentPane.add(this.betaCraftAuth);
+        }
+        {
+            this.stateLabel = new JLabel();
+            this.stateLabel.setBounds(14, 280, 465, 20);
+            this.stateLabel.setVisible(false);
+            this.contentPane.add(this.stateLabel);
+        }
+        {
+            this.stateButton = new JButton("Loading ViaProxy...");
+            this.stateButton.setBounds(10, 300, 465, 20);
+            this.stateButton.addActionListener(e -> {
+                if (this.stateButton.getText().equalsIgnoreCase("Start")) this.start();
+                else if (this.stateButton.getText().equalsIgnoreCase("Stop")) this.stop();
+            });
+            this.stateButton.setEnabled(false);
+            this.contentPane.add(this.stateButton);
+        }
+    }
+
+    private void setComponentsEnabled(final boolean state) {
+        this.serverAddress.setEnabled(state);
+        this.serverVersion.setEnabled(state);
+        this.bindPort.setEnabled(state);
+        this.authMethod.setEnabled(state);
+        this.betaCraftAuth.setEnabled(state);
+    }
+
+    private void updateStateLabel() {
+        this.stateLabel.setText("ViaProxy is running! Connect with Minecraft 1.7+ to 127.0.0.1:" + this.bindPort.getValue());
+        this.stateLabel.setVisible(true);
+    }
+
+    private void start() {
+        this.setComponentsEnabled(false);
+        this.stateButton.setEnabled(false);
+        this.stateButton.setText("Starting...");
+
+        new Thread(() -> {
+            final String serverAddress = this.serverAddress.getText();
+            final VersionEnum serverVersion = (VersionEnum) this.serverVersion.getSelectedItem();
+            final int bindPort = (int) this.bindPort.getValue();
+            final String authMethod = (String) this.authMethod.getSelectedItem();
+            final boolean betaCraftAuth = this.betaCraftAuth.isSelected();
+
+            try {
+                final HostAndPort hostAndPort = HostAndPort.fromString(serverAddress);
+
+                Options.BIND_ADDRESS = "127.0.0.1";
+                Options.BIND_PORT = bindPort;
+                Options.CONNECT_ADDRESS = hostAndPort.getHost();
+                Options.CONNECT_PORT = hostAndPort.getPortOrDefault(25565);
+                Options.PROTOCOL_VERSION = serverVersion;
+
+                Options.OPENAUTHMOD_AUTH = true;
+                Options.BETACRAFT_AUTH = betaCraftAuth;
+
+                ViaProxy.startProxy();
+
+                SwingUtilities.invokeLater(() -> {
+                    this.updateStateLabel();
+                    this.stateButton.setEnabled(true);
+                    this.stateButton.setText("Stop");
+                });
+            } catch (Throwable e) {
+                SwingUtilities.invokeLater(() -> {
+                    this.showError("Invalid server address!");
+                    this.setComponentsEnabled(true);
+                    this.stateButton.setEnabled(true);
+                    this.stateButton.setText("Start");
+                    this.stateLabel.setVisible(false);
+                });
+            }
+        }).start();
+    }
+
+    private void stop() {
+        ViaProxy.stopProxy();
+
+        this.stateLabel.setVisible(false);
+        this.stateButton.setText("Start");
+        this.setComponentsEnabled(true);
+    }
+
+
+    public void setReady() {
+        SwingUtilities.invokeLater(() -> {
+            this.stateButton.setText("Start");
+            this.stateButton.setEnabled(true);
+        });
+    }
+
+
+    public void showInfo(final String message) {
+        this.showNotification(message, JOptionPane.INFORMATION_MESSAGE);
+    }
+
+    public void showWarning(final String message) {
+        this.showNotification(message, JOptionPane.WARNING_MESSAGE);
+    }
+
+    public void showError(final String message) {
+        this.showNotification(message, JOptionPane.ERROR_MESSAGE);
+    }
+
+    public void showNotification(final String message, final int type) {
+        JOptionPane.showMessageDialog(this, message, "ViaProxy", type);
+    }
+
+}
--- a/src/main/java/net/raphimc/viaproxy/util/ArrayHelper.java
+++ b/src/main/java/net/raphimc/viaproxy/util/ArrayHelper.java
@ -0,0 +1,353 @@
+package net.raphimc.viaproxy.util;
+
+import java.lang.reflect.Array;
+
+public class ArrayHelper {
+
+    public static ArrayHelper instanceOf(final String... array) {
+        return new ArrayHelper(array);
+    }
+
+
+    private String[] array;
+
+    public ArrayHelper(final String[] array) {
+        this.array = array;
+    }
+
+    public int getLength() {
+        return this.array.length;
+    }
+
+    public boolean isLength(final int length) {
+        return this.getLength() == length;
+    }
+
+    public boolean isSmaller(final int length) {
+        return this.getLength() < length;
+    }
+
+    public boolean isSmallerOrEqual(final int length) {
+        return this.getLength() <= length;
+    }
+
+    public boolean isLarger(final int length) {
+        return this.getLength() > length;
+    }
+
+    public boolean isLargerOrEqual(final int length) {
+        return this.getLength() >= length;
+    }
+
+    public boolean isEmpty() {
+        return this.getLength() == 0;
+    }
+
+    public boolean isIndexValid(final int index) {
+        return index >= 0 && index < this.getLength();
+    }
+
+    public String get(final int index) {
+        if (!this.isIndexValid(index)) {
+            return null;
+        }
+
+        return this.array[index];
+    }
+
+
+    public boolean isString(final int index) {
+        return this.isIndexValid(index);
+    }
+
+    public boolean isBoolean(final int index) {
+        if (!this.isIndexValid(index)) {
+            return false;
+        }
+
+        try {
+            Boolean.valueOf(this.getString(index));
+            return true;
+        } catch (Exception ignored) {
+        }
+
+        return false;
+    }
+
+    public boolean isChar(final int index) {
+        if (!this.isIndexValid(index) || !this.isString(index)) {
+            return false;
+        }
+
+        return this.getString(index).length() == 1;
+    }
+
+    public boolean isShort(final int index) {
+        if (!this.isIndexValid(index)) {
+            return false;
+        }
+
+        try {
+            Short.valueOf(this.get(index));
+            return true;
+        } catch (Exception ignored) {
+        }
+
+        return false;
+    }
+
+    public boolean isInteger(final int index) {
+        if (!this.isIndexValid(index)) {
+            return false;
+        }
+
+        try {
+            Integer.valueOf(this.get(index));
+            return true;
+        } catch (Exception ignored) {
+        }
+
+        return false;
+    }
+
+    public boolean isLong(final int index) {
+        if (!this.isIndexValid(index)) {
+            return false;
+        }
+
+        try {
+            Long.valueOf(this.get(index));
+            return true;
+        } catch (Exception ignored) {
+        }
+
+        return false;
+    }
+
+    public boolean isFloat(final int index) {
+        if (!this.isIndexValid(index)) {
+            return false;
+        }
+
+        try {
+            Float.valueOf(this.get(index));
+            return true;
+        } catch (Exception ignored) {
+        }
+
+        return false;
+    }
+
+    public boolean isDouble(final int index) {
+        if (!this.isIndexValid(index)) {
+            return false;
+        }
+
+        try {
+            Double.valueOf(this.get(index));
+            return true;
+        } catch (Exception ignored) {
+        }
+
+        return false;
+    }
+
+
+    public String getString(final int index, final String standart) {
+        if (!this.isIndexValid(index) || !this.isString(index)) {
+            return standart;
+        }
+
+        return this.get(index);
+    }
+
+    public boolean getBoolean(final int index, final boolean standart) {
+        if (!this.isIndexValid(index) || !this.isBoolean(index)) {
+            return standart;
+        }
+
+        return Boolean.parseBoolean(this.getString(index));
+    }
+
+    public char getChar(final int index, final char standart) {
+        if (!this.isIndexValid(index) || !this.isChar(index)) {
+            return standart;
+        }
+
+        return this.getString(index, String.valueOf(standart)).charAt(0);
+    }
+
+    public short getShort(final int index, final short standart) {
+        if (!this.isIndexValid(index) || !this.isShort(index)) {
+            return standart;
+        }
+
+        return Short.parseShort(this.get(index));
+    }
+
+    public int getInteger(final int index, final int standart) {
+        if (!this.isIndexValid(index) || !this.isInteger(index)) {
+            return standart;
+        }
+
+        return Integer.parseInt(this.get(index));
+    }
+
+    public long getLong(final int index, final long standart) {
+        if (!this.isIndexValid(index) || !this.isLong(index)) {
+            return standart;
+        }
+
+        return Long.parseLong(this.get(index));
+    }
+
+    public float getFloat(final int index, final float standart) {
+        if (!this.isIndexValid(index) || !this.isFloat(index)) {
+            return standart;
+        }
+
+        return Float.parseFloat(this.get(index));
+    }
+
+    public double getDouble(final int index, final double standart) {
+        if (!this.isIndexValid(index) || !this.isDouble(index)) {
+            return standart;
+        }
+
+        return Double.parseDouble(this.get(index));
+    }
+
+
+    public String getString(final int index) {
+        return this.getString(index, "");
+    }
+
+    public boolean getBoolean(final int index) {
+        return this.getBoolean(index, false);
+    }
+
+    public char getChar(final int index) {
+        return this.getChar(index, "A".toCharArray()[0]);
+    }
+
+    public short getShort(final int index) {
+        return this.getShort(index, (short) 0);
+    }
+
+    public int getInteger(final int index) {
+        return this.getInteger(index, 0);
+    }
+
+    public long getLong(final int index) {
+        return this.getLong(index, 0);
+    }
+
+    public float getFloat(final int index) {
+        return this.getFloat(index, 0);
+    }
+
+    public double getDouble(final int index) {
+        return this.getDouble(index, 0);
+    }
+
+    public ArrayHelper add(final String object, final String... objects) {
+        this.array = this.advance(object, objects);
+        return this;
+    }
+
+
+    public String[] advance(final String obToAdd, final String... obs) {
+        String[] newArray = new String[this.getLength() + 1 + obs.length];
+
+        int i = 0;
+        for (String ob : this.array) {
+            Array.set(newArray, i, ob);
+
+            i++;
+        }
+        Array.set(newArray, i, obToAdd);
+        i++;
+        for (String ob : obs) {
+            Array.set(newArray, i, ob);
+            i++;
+        }
+
+        return newArray;
+    }
+
+    public String[] advanceToStrings(final String strToAdd, final String... strs) {
+        String[] newArray = new String[this.getLength() + 1 + strs.length];
+
+        int i = 0;
+        for (Object ob : this.array) {
+            newArray[i] = ob.toString();
+
+            i++;
+        }
+        newArray[i] = strToAdd;
+        i++;
+        for (String str : strs) {
+            newArray[i] = str;
+            i++;
+        }
+
+        return newArray;
+    }
+
+    public String[] getAsArray() {
+        return this.array;
+    }
+
+    public String getAsString() {
+        return this.getAsString(0, " ");
+    }
+
+    public String getAsString(final String combiner) {
+        return this.getAsString(0, combiner);
+    }
+
+    public String getAsString(final int start) {
+        return this.getAsString(start, " ");
+    }
+
+    public String getAsString(final int start, final String combiner) {
+        return this.getAsString(start, this.getLength() - 1, combiner);
+    }
+
+    public String getAsString(final int start, final int end) {
+        return this.getAsString(start, end, " ");
+    }
+
+    public String getAsString(int start, int end, final String combiner) {
+        if (start < 0) {
+            start = 0;
+        }
+        if (end > this.getLength() - 1) {
+            end = this.getLength() - 1;
+        }
+        if (end < start) {
+            return "";
+        }
+
+        String out = "";
+        for (int i = start; i <= end; i++) {
+            if (out.isEmpty()) {
+                out = this.getString(i);
+            } else {
+                out += combiner + this.getString(i);
+            }
+        }
+        return out;
+    }
+
+
+    @Override
+    public String toString() {
+        String complete = "";
+        for (String t : this.array) {
+            complete += (complete.isEmpty() ? "" : ", ") + t;
+        }
+        return "[" + complete + "]";
+    }
+
+}
--- a/src/main/java/net/raphimc/viaproxy/util/LocalSocketClient.java
+++ b/src/main/java/net/raphimc/viaproxy/util/LocalSocketClient.java
@ -0,0 +1,37 @@
+package net.raphimc.viaproxy.util;
+
+import java.io.DataInputStream;
+import java.io.DataOutputStream;
+import java.net.InetSocketAddress;
+import java.net.Socket;
+
+public class LocalSocketClient {
+
+    private final int port;
+
+    public LocalSocketClient(final int port) {
+        this.port = port;
+    }
+
+    public String[] request(final String command, final String... args) {
+        try {
+            final Socket socket = new Socket();
+            socket.setSoTimeout(500);
+            socket.connect(new InetSocketAddress("127.0.0.1", this.port), 500);
+            final DataOutputStream out = new DataOutputStream(socket.getOutputStream());
+            final DataInputStream in = new DataInputStream(socket.getInputStream());
+
+            out.writeUTF(command);
+            out.writeInt(args.length);
+            for (String s : args) out.writeUTF(s);
+
+            final String[] response = new String[in.readInt()];
+            for (int i = 0; i < response.length; i++) response[i] = in.readUTF();
+            socket.close();
+            return response;
+        } catch (Throwable e) {
+            return null;
+        }
+    }
+
+}
--- a/src/main/java/net/raphimc/viaproxy/util/logging/Logger.java
+++ b/src/main/java/net/raphimc/viaproxy/util/logging/Logger.java
@ -0,0 +1,46 @@
+package net.raphimc.viaproxy.util.logging;
+
+import com.github.steveice10.mc.auth.data.GameProfile;
+import com.viaversion.viaversion.api.connection.UserConnection;
+import org.apache.logging.log4j.Level;
+import org.apache.logging.log4j.LogManager;
+
+import java.io.PrintStream;
+import java.net.InetSocketAddress;
+import java.net.SocketAddress;
+import java.util.Locale;
+
+public class Logger {
+
+    public static final org.apache.logging.log4j.Logger LOGGER = LogManager.getLogger("ViaProxy");
+
+    public static final PrintStream SYSOUT = System.out;
+    public static final PrintStream SYSERR = System.err;
+
+    public static void setup() {
+        System.setErr(new LoggerPrintStream("STDERR", SYSERR));
+        System.setOut(new LoggerPrintStream("STDOUT", SYSOUT));
+    }
+
+    public static void u_info(final String title, final SocketAddress address, final GameProfile gameProfile, final String msg) {
+        u_log(Level.INFO, title, address, gameProfile, msg);
+    }
+
+    public static void u_err(final String title, final SocketAddress address, final GameProfile gameProfile, final String msg) {
+        u_log(Level.ERROR, title, address, gameProfile, msg);
+    }
+
+    public static void u_err(final String title, final UserConnection user, final String msg) {
+        GameProfile gameProfile = null;
+        if (user.getProtocolInfo().getUsername() != null) {
+            gameProfile = new GameProfile(user.getProtocolInfo().getUuid(), user.getProtocolInfo().getUsername());
+        }
+        u_log(Level.ERROR, title, user.getChannel().remoteAddress(), gameProfile, msg);
+    }
+
+    public static void u_log(final Level level, final String title, final SocketAddress address, final GameProfile gameProfile, final String msg) {
+        final InetSocketAddress socketAddress = (InetSocketAddress) address;
+        LOGGER.log(level, "[" + title.toUpperCase(Locale.ROOT) + "] (" + socketAddress.getAddress().getHostAddress() + " | " + (gameProfile != null ? gameProfile.getName() : "null") + ") " + msg);
+    }
+
+}
--- a/src/main/java/net/raphimc/viaproxy/util/logging/LoggerPrintStream.java
+++ b/src/main/java/net/raphimc/viaproxy/util/logging/LoggerPrintStream.java
@ -0,0 +1,32 @@
+package net.raphimc.viaproxy.util.logging;
+
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
+
+import java.io.OutputStream;
+import java.io.PrintStream;
+
+public class LoggerPrintStream extends PrintStream {
+
+    protected static final Logger LOGGER = LogManager.getLogger();
+    protected final String name;
+
+    public LoggerPrintStream(final String name, final OutputStream out) {
+        super(out);
+
+        this.name = name;
+    }
+
+    public void println(final String message) {
+        this.log(message);
+    }
+
+    public void println(final Object object) {
+        this.log(String.valueOf(object));
+    }
+
+    protected void log(final String message) {
+        LOGGER.info("[{}]: {}", this.name, message);
+    }
+
+}
--- a/src/main/resources/assets/icons/icon.png
+++ b/src/main/resources/assets/icons/icon.png
--- a/src/main/resources/log4j2.xml
+++ b/src/main/resources/log4j2.xml
@ -0,0 +1,39 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Configuration status="WARN">
+	<Appenders>
+		<!--	System out	-->
+		<Console name="SysOut" target="SYSTEM_OUT">
+			<PatternLayout pattern="%style{[%d{HH:mm:ss}]}{blue} %highlight{[%t/%level]}{FATAL=red, ERROR=red, WARN=yellow, INFO=green, DEBUG=green, TRACE=blue} %style{(%logger{1})}{cyan} %highlight{%msg%n}{FATAL=red, ERROR=red, WARN=normal, INFO=normal, DEBUG=normal, TRACE=normal}" disableAnsi="false"/>
+		</Console>
+
+		<!--	latest.log same as vanilla	-->
+		<RollingRandomAccessFile name="LatestFile" fileName="logs/latest.log" filePattern="logs/%d{yyyy-MM-dd}-%i.log.gz">
+			<PatternLayout pattern="[%d{HH:mm:ss}] [%t/%level] (%logger{1}) %msg{nolookups}%n"/>
+			<Policies>
+				<TimeBasedTriggeringPolicy />
+				<OnStartupTriggeringPolicy />
+			</Policies>
+		</RollingRandomAccessFile>
+
+		<!--	Debug log file	-->
+		<RollingRandomAccessFile name="DebugFile" fileName="logs/debug.log" filePattern="logs/debug-%i.log.gz">
+			<PatternLayout pattern="[%d{HH:mm:ss}] [%t/%level] (%logger) %msg{nolookups}%n"/>
+
+			<!--	Keep 5 files max	-->
+			<DefaultRolloverStrategy max="5" fileIndex="min"/>
+
+			<Policies>
+				<SizeBasedTriggeringPolicy size="200MB"/>
+				<OnStartupTriggeringPolicy />
+			</Policies>
+		</RollingRandomAccessFile>
+	</Appenders>
+
+	<Loggers>
+		<Root level="all">
+			<AppenderRef ref="DebugFile" level="debug"/>
+			<AppenderRef ref="SysOut" level="info"/>
+			<AppenderRef ref="LatestFile" level="info"/>
+		</Root>
+	</Loggers>
+</Configuration>