Fix finding the player injector with newer ProtocolLib versions

Fixes #1210

README.md

@@ -64,7 +64,7 @@ Possible values: `Premium`, `Cracked`, `Unknown`
 * Server software in offlinemode:
   * Spigot (or a fork e.g. Paper) 1.8.8+
     * Protocol plugin:
-      * [ProtocolLib 5.2+](https://www.spigotmc.org/resources/protocollib.1997/) or
+      * [ProtocolLib 5.3+ with development build above 720](https://www.spigotmc.org/resources/protocollib.1997/) or
       * [ProtocolSupport](https://www.spigotmc.org/resources/protocolsupport.7201/)
   * Latest BungeeCord (or a fork e.g. Waterfall) or Velocity proxy
 * An auth plugin.

bukkit/pom.xml

@@ -126,9 +126,6 @@
         <repository>
             <id>dmulloy2-repo</id>
             <url>https://repo.dmulloy2.net/repository/public/</url>
-            <snapshots>
-                <enabled>false</enabled>
-            </snapshots>
         </repository>
 
         <!-- AuthMe Reloaded, xAuth and LoginSecurity -->
@@ -211,7 +208,7 @@
         <dependency>
             <groupId>com.comphenix.protocol</groupId>
             <artifactId>ProtocolLib</artifactId>
-            <version>5.1.0</version>
+            <version>5.3.0-SNAPSHOT</version>
             <scope>provided</scope>
             <exclusions>
                 <exclusion>

bukkit/src/main/java/com/github/games647/fastlogin/bukkit/listener/protocollib/ProtocolLibListener.java

@@ -30,12 +30,11 @@ import com.comphenix.protocol.ProtocolLibrary;
 import com.comphenix.protocol.events.PacketAdapter;
 import com.comphenix.protocol.events.PacketContainer;
 import com.comphenix.protocol.events.PacketEvent;
-import com.comphenix.protocol.injector.PacketFilterManager;
-import com.comphenix.protocol.injector.player.PlayerInjectionHandler;
+import com.comphenix.protocol.injector.netty.channel.NettyChannelInjector;
+import com.comphenix.protocol.injector.temporary.TemporaryPlayerFactory;
 import com.comphenix.protocol.reflect.FieldAccessException;
 import com.comphenix.protocol.reflect.FuzzyReflection;
 import com.comphenix.protocol.reflect.accessors.Accessors;
-import com.comphenix.protocol.reflect.accessors.FieldAccessor;
 import com.comphenix.protocol.utility.MinecraftVersion;
 import com.comphenix.protocol.wrappers.BukkitConverters;
 import com.comphenix.protocol.wrappers.Converters;
@@ -75,7 +74,6 @@ import static com.comphenix.protocol.PacketType.Login.Client.START;
 public class ProtocolLibListener extends PacketAdapter {
 
     private final FastLoginBukkit plugin;
-    private final PlayerInjectionHandler handler;
 
     //just create a new once on plugin enable. This used for verify token generation
     private final SecureRandom random = new SecureRandom();
@@ -94,7 +92,6 @@ public class ProtocolLibListener extends PacketAdapter {
         this.plugin = plugin;
         this.antiBotService = antiBotService;
         this.verifyClientKeys = verifyClientKeys;
-        this.handler = getHandler();
     }
 
     public static void register(FastLoginBukkit plugin, AntiBotService antiBotService, boolean verifyClientKeys) {
@@ -297,18 +294,19 @@ public class ProtocolLibListener extends PacketAdapter {
         return profile.getName();
     }
 
-    private static PlayerInjectionHandler getHandler() {
-        PacketFilterManager manager = (PacketFilterManager) ProtocolLibrary.getProtocolManager();
-        FieldAccessor accessor = Accessors.getFieldAccessor(manager.getClass(), PlayerInjectionHandler.class, true);
-        return (PlayerInjectionHandler) accessor.get(manager);
-    }
-
     private FloodgatePlayer getFloodgatePlayer(Player player) {
-        Channel channel = handler.getChannel(player);
+        Channel channel = getChannel(player);
         AttributeKey<FloodgatePlayer> floodgateAttribute = AttributeKey.valueOf("floodgate-player");
         return channel.attr(floodgateAttribute).get();
     }
 
+    private static Channel getChannel(Player player) {
+        NettyChannelInjector injector = (NettyChannelInjector) Accessors.getMethodAccessorOrNull(
+                        TemporaryPlayerFactory.class, "getInjectorFromPlayer", Player.class
+                ).invoke(null, player);
+        return injector.getWrappedChannel();
+    }
+
     /**
      * Reimplementation of the tasks injected Floodgate in ProtocolLib that are not run due to a bug
      * @see <a href="https://github.com/GeyserMC/Floodgate/issues/143">Issue Floodgate#143</a>
@@ -325,7 +323,7 @@ public class ProtocolLibListener extends PacketAdapter {
         }
 
         // kick the player, if necessary
-        Channel channel = handler.getChannel(packetEvent.getPlayer());
+        Channel channel = getChannel(packetEvent.getPlayer());
         AttributeKey<String> kickMessageAttribute = AttributeKey.valueOf("floodgate-kick-message");
         String kickMessage = channel.attr(kickMessageAttribute).get();
         if (kickMessage != null) {

bukkit/src/main/java/com/github/games647/fastlogin/bukkit/listener/protocollib/VerifyResponseTask.java

@@ -28,6 +28,7 @@ package com.github.games647.fastlogin.bukkit.listener.protocollib;
 import com.comphenix.protocol.ProtocolLibrary;
 import com.comphenix.protocol.events.PacketContainer;
 import com.comphenix.protocol.events.PacketEvent;
+import com.comphenix.protocol.injector.netty.channel.NettyChannelInjector;
 import com.comphenix.protocol.injector.packet.PacketRegistry;
 import com.comphenix.protocol.injector.temporary.TemporaryPlayerFactory;
 import com.comphenix.protocol.reflect.EquivalentConverter;
@@ -218,15 +219,14 @@ public class VerifyResponseTask implements Runnable {
 
     //try to get the networkManager from ProtocolLib
     private Object getNetworkManager() throws ClassNotFoundException {
-        Object injectorContainer = TemporaryPlayerFactory.getInjectorFromPlayer(player);
+        NettyChannelInjector injectorContainer = (NettyChannelInjector) Accessors.getMethodAccessorOrNull(
+                TemporaryPlayerFactory.class, "getInjectorFromPlayer", Player.class
+        ).invoke(null, player);
 
-        // ChannelInjector
-        Class<?> injectorClass = Class.forName("com.comphenix.protocol.injector.netty.Injector");
-        Object rawInjector = FuzzyReflection.getFieldValue(injectorContainer, injectorClass, true);
-
-        Class<?> rawInjectorClass = rawInjector.getClass();
-        FieldAccessor accessor = Accessors.getFieldAccessorOrNull(rawInjectorClass, "networkManager", Object.class);
-        return accessor.get(rawInjector);
+        FieldAccessor accessor = Accessors.getFieldAccessorOrNull(
+                NettyChannelInjector.class, "networkManager", Object.class
+        );
+        return accessor.get(injectorContainer);
     }
 
     private boolean enableEncryption(SecretKey loginKey) throws IllegalArgumentException {