init

.gitignore

@@ -0,0 +1,12 @@
+### Idea Gradle template
+### IDEA ###
+.idea
+*.iml
+
+### Gradle ###
+.gradle
+build
+
+
+### Other ###
+run

build.gradle.kts

@@ -0,0 +1,24 @@
+plugins {
+    kotlin("jvm") version "1.6.10"
+    id("io.papermc.paperweight.userdev") version "1.3.3"
+    id("xyz.jpenilla.run-paper") version "1.0.6" // Adds runServer and runMojangMappedServer tasks for testing
+    id("net.minecrell.plugin-yml.bukkit") version "0.5.1" // Generates plugin.yml
+}
+
+group = "cc.maxmc.sample"
+version = "1.0-XIEYAN"
+
+repositories {
+    mavenCentral()
+}
+
+dependencies {
+    paperDevBundle("1.18.1-R0.1-SNAPSHOT")
+    implementation(kotlin("stdlib"))
+}
+
+bukkit {
+    main = "cc.maxmc.sample.PacketSample"
+    apiVersion = "1.18"
+    authors = listOf("Author")
+}

gradle.properties

@@ -0,0 +1 @@
+kotlin.code.style=official

gradle/wrapper/gradle-wrapper.properties

@@ -0,0 +1,5 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-7.2-bin.zip
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists

gradlew

@@ -0,0 +1,185 @@
+#!/usr/bin/env sh
+
+#
+# Copyright 2015 the original author or 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 UN*X
+##
+##############################################################################
+
+# Attempt to set APP_HOME
+# Resolve links: $0 may be a link
+PRG="$0"
+# Need this for relative symlinks.
+while [ -h "$PRG" ] ; do
+    ls=`ls -ld "$PRG"`
+    link=`expr "$ls" : '.*-> \(.*\)$'`
+    if expr "$link" : '/.*' > /dev/null; then
+        PRG="$link"
+    else
+        PRG=`dirname "$PRG"`"/$link"
+    fi
+done
+SAVED="`pwd`"
+cd "`dirname \"$PRG\"`/" >/dev/null
+APP_HOME="`pwd -P`"
+cd "$SAVED" >/dev/null
+
+APP_NAME="Gradle"
+APP_BASE_NAME=`basename "$0"`
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD="maximum"
+
+warn () {
+    echo "$*"
+}
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+}
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "`uname`" in
+  CYGWIN* )
+    cygwin=true
+    ;;
+  Darwin* )
+    darwin=true
+    ;;
+  MSYS* | MINGW* )
+    msys=true
+    ;;
+  NONSTOP* )
+    nonstop=true
+    ;;
+esac
+
+CLASSPATH=$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" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ] ; then
+    MAX_FD_LIMIT=`ulimit -H -n`
+    if [ $? -eq 0 ] ; then
+        if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then
+            MAX_FD="$MAX_FD_LIMIT"
+        fi
+        ulimit -n $MAX_FD
+        if [ $? -ne 0 ] ; then
+            warn "Could not set maximum file descriptor limit: $MAX_FD"
+        fi
+    else
+        warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT"
+    fi
+fi
+
+# For Darwin, add options to specify how the application appears in the dock
+if $darwin; then
+    GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
+fi
+
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if [ "$cygwin" = "true" -o "$msys" = "true" ] ; then
+    APP_HOME=`cygpath --path --mixed "$APP_HOME"`
+    CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
+
+    JAVACMD=`cygpath --unix "$JAVACMD"`
+
+    # We build the pattern for arguments to be converted via cygpath
+    ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null`
+    SEP=""
+    for dir in $ROOTDIRSRAW ; do
+        ROOTDIRS="$ROOTDIRS$SEP$dir"
+        SEP="|"
+    done
+    OURCYGPATTERN="(^($ROOTDIRS))"
+    # Add a user-defined pattern to the cygpath arguments
+    if [ "$GRADLE_CYGPATTERN" != "" ] ; then
+        OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)"
+    fi
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    i=0
+    for arg in "$@" ; do
+        CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -`
+        CHECK2=`echo "$arg"|egrep -c "^-"`                                 ### Determine if an option
+
+        if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then                    ### Added a condition
+            eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"`
+        else
+            eval `echo args$i`="\"$arg\""
+        fi
+        i=`expr $i + 1`
+    done
+    case $i in
+        0) set -- ;;
+        1) set -- "$args0" ;;
+        2) set -- "$args0" "$args1" ;;
+        3) set -- "$args0" "$args1" "$args2" ;;
+        4) set -- "$args0" "$args1" "$args2" "$args3" ;;
+        5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
+        6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
+        7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
+        8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
+        9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
+    esac
+fi
+
+# Escape application args
+save () {
+    for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done
+    echo " "
+}
+APP_ARGS=`save "$@"`
+
+# Collect all arguments for the java command, following the shell quoting and substitution rules
+eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS"
+
+exec "$JAVACMD" "$@"

gradlew.bat

@@ -0,0 +1,89 @@
+@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%" == "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%"=="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!
+if  not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
+exit /b 1
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega

settings.gradle.kts

@@ -0,0 +1,8 @@
+pluginManagement {
+    repositories {
+        gradlePluginPortal()
+        maven("https://papermc.io/repo/repository/maven-public/")
+    }
+}
+
+rootProject.name = "PacketSample"

src/main/java/cc/maxmc/sample/PacketSample.java

@@ -0,0 +1,18 @@
+package cc.maxmc.sample;
+
+import cc.maxmc.sample.listener.ChatListener;
+import cc.maxmc.sample.packet.listener.HandleInjectListener;
+import org.bukkit.Bukkit;
+import org.bukkit.plugin.java.JavaPlugin;
+
+public class PacketSample extends JavaPlugin {
+
+    @Override
+    public void onEnable() {
+        Bukkit.getConsoleSender().sendMessage("§b| §7注入数据包监听器...");
+        Bukkit.getPluginManager().registerEvents(new HandleInjectListener(), this);
+        Bukkit.getConsoleSender().sendMessage("§a| §7成功注入数据包监听器.");
+
+        Bukkit.getPluginManager().registerEvents(new ChatListener(), this);
+    }
+}

src/main/java/cc/maxmc/sample/listener/ChatListener.java

@@ -0,0 +1,17 @@
+package cc.maxmc.sample.listener;
+
+import cc.maxmc.sample.packet.events.PacketPlayOutEvent;
+import net.minecraft.network.protocol.game.ClientboundChatPacket;
+import org.bukkit.event.EventHandler;
+import org.bukkit.event.Listener;
+
+public class ChatListener implements Listener {
+    @EventHandler
+    public void onChatPacket(PacketPlayOutEvent packetEvent) {
+        if (!(packetEvent.getPacket() instanceof ClientboundChatPacket packet)) return;
+        var name = packetEvent.getPlayer().getName();
+        System.out.println(name);
+        System.out.println("msg: " + packet.getMessage());
+        System.out.println("aMsg: " + packet.adventure$message);
+    }
+}

src/main/java/cc/maxmc/sample/packet/PacketHandler.java

@@ -0,0 +1,40 @@
+package cc.maxmc.sample.packet;
+
+import cc.maxmc.sample.packet.events.PacketPlayInEvent;
+import cc.maxmc.sample.packet.events.PacketPlayOutEvent;
+import io.netty.channel.ChannelDuplexHandler;
+import io.netty.channel.ChannelHandlerContext;
+import io.netty.channel.ChannelPromise;
+import org.bukkit.Bukkit;
+import org.bukkit.entity.Player;
+
+public class PacketHandler extends ChannelDuplexHandler {
+    private Player player;
+    public Player getPlayer() {
+        return player;
+    }
+
+    public PacketHandler(Player player) {
+        this.player = player;
+    }
+
+    @Override
+    public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {
+        var event = new PacketPlayInEvent(player, msg);
+        Bukkit.getPluginManager().callEvent(event);
+        if (event.isCancelled()) {
+            return;
+        }
+        super.channelRead(ctx, msg);
+    }
+
+    @Override
+    public void write(ChannelHandlerContext ctx, Object msg, ChannelPromise promise) throws Exception {
+        var event = new PacketPlayOutEvent(player, msg);
+        Bukkit.getPluginManager().callEvent(event);
+        if (event.isCancelled()) {
+            return;
+        }
+        super.write(ctx, event.getPacket(), promise);
+    }
+}

src/main/java/cc/maxmc/sample/packet/events/PacketPlayInEvent.java

@@ -0,0 +1,44 @@
+package cc.maxmc.sample.packet.events;
+
+import org.bukkit.entity.Player;
+import org.bukkit.event.Cancellable;
+import org.bukkit.event.HandlerList;
+import org.bukkit.event.player.PlayerEvent;
+import org.jetbrains.annotations.NotNull;
+
+public class PacketPlayInEvent extends PlayerEvent implements Cancellable {
+    private static final HandlerList handlerList = new HandlerList();
+    private Object packet;
+    private boolean cancelled = false;
+
+    public PacketPlayInEvent(@NotNull Player who, @NotNull Object packet) {
+        super(who, true);
+        this.packet = packet;
+    }
+
+    @Override
+    public @NotNull HandlerList getHandlers() {
+        return handlerList;
+    }
+    public @NotNull static HandlerList getHandlerList() {
+        return handlerList;
+    }
+
+    public Object getPacket() {
+        return packet;
+    }
+
+    public void setPacket(Object packet) {
+        this.packet = packet;
+    }
+
+    @Override
+    public boolean isCancelled() {
+        return cancelled;
+    }
+
+    @Override
+    public void setCancelled(boolean cancelled) {
+        this.cancelled = cancelled;
+    }
+}

src/main/java/cc/maxmc/sample/packet/events/PacketPlayOutEvent.java

@@ -0,0 +1,46 @@
+package cc.maxmc.sample.packet.events;
+
+import org.bukkit.entity.Player;
+import org.bukkit.event.Cancellable;
+import org.bukkit.event.HandlerList;
+import org.bukkit.event.player.PlayerEvent;
+import org.jetbrains.annotations.NotNull;
+
+public class PacketPlayOutEvent extends PlayerEvent implements Cancellable {
+    private static final HandlerList handlerList = new HandlerList();
+    private Object packet;
+    private boolean cancelled;
+
+    public PacketPlayOutEvent(@NotNull Player who, @NotNull Object packet) {
+        super(who, true);
+        this.packet = packet;
+    }
+
+    public @NotNull
+    static HandlerList getHandlerList() {
+        return handlerList;
+    }
+
+    @Override
+    public @NotNull HandlerList getHandlers() {
+        return handlerList;
+    }
+
+    public Object getPacket() {
+        return packet;
+    }
+
+    public void setPacket(Object packet) {
+        this.packet = packet;
+    }
+
+    @Override
+    public boolean isCancelled() {
+        return cancelled;
+    }
+
+    @Override
+    public void setCancelled(boolean cancelled) {
+        this.cancelled = cancelled;
+    }
+}

src/main/java/cc/maxmc/sample/packet/listener/HandleInjectListener.java

@@ -0,0 +1,15 @@
+package cc.maxmc.sample.packet.listener;
+
+import cc.maxmc.sample.packet.PacketHandler;
+import org.bukkit.craftbukkit.v1_18_R1.entity.CraftPlayer;
+import org.bukkit.event.EventHandler;
+import org.bukkit.event.Listener;
+import org.bukkit.event.player.PlayerJoinEvent;
+
+public class HandleInjectListener implements Listener {
+    @EventHandler
+    public void onJoin(PlayerJoinEvent e) {
+        var channel = ((CraftPlayer) e.getPlayer()).getHandle().networkManager.channel;
+        channel.pipeline().addBefore("packet_handler", "taboolib5_packet_handler", new PacketHandler(e.getPlayer()));
+    }
+}