Merge remote-tracking branch 'upstream/dev/3.0.0'

This reverts commit 11834de220.

.github/workflows/gradle.yml

@@ -14,10 +14,10 @@ jobs:
         persist-credentials: false
     - name: Set up Gradle
       uses: gradle/actions/setup-gradle@v4
-    - name: Set up JDK 17
+    - name: Set up JDK 21
       uses: actions/setup-java@v4
       with:
-        java-version: 17
+        java-version: 21
-        distribution: 'temurin'
+        distribution: 'zulu'
     - name: Build with Gradle
       run: ./gradlew build

api/src/main/java/com/velocitypowered/api/command/CommandManager.java

@@ -7,8 +7,10 @@
 
 package com.velocitypowered.api.command;
 
+import com.mojang.brigadier.suggestion.Suggestions;
 import com.velocitypowered.api.event.command.CommandExecuteEvent;
 import java.util.Collection;
+import java.util.List;
 import java.util.concurrent.CompletableFuture;
 import java.util.function.Predicate;
 import org.checkerframework.checker.nullness.qual.Nullable;
@@ -116,6 +118,27 @@ public interface CommandManager {
    */
   CompletableFuture<Boolean> executeImmediatelyAsync(CommandSource source, String cmdLine);
 
+  /**
+   * Asynchronously collects suggestions to fill in the given command {@code cmdLine}.
+   * Returns only the raw completion suggestions without tooltips.
+   *
+   * @param source  the source to execute the command for
+   * @param cmdLine the partially completed command
+   * @return a {@link CompletableFuture} eventually completed with a {@link List}, possibly empty
+   */
+  CompletableFuture<List<String>> offerSuggestions(CommandSource source, String cmdLine);
+
+  /**
+   * Asynchronously collects suggestions to fill in the given command {@code cmdLine}.
+   * Returns the brigadier {@link Suggestions} with tooltips for each result.
+   *
+   * @param source  the source to execute the command for
+   * @param cmdLine the partially completed command
+   * @return a {@link CompletableFuture} eventually completed with {@link Suggestions}, possibly
+   *         empty
+   */
+  CompletableFuture<Suggestions> offerBrigadierSuggestions(CommandSource source, String cmdLine);
+
   /**
    * Returns an immutable collection of the case-insensitive aliases registered
    * on this manager.

api/src/main/java/com/velocitypowered/api/network/ProtocolVersion.java

@@ -90,7 +90,9 @@ public enum ProtocolVersion implements Ordered<ProtocolVersion> {
   MINECRAFT_1_21(767, "1.21", "1.21.1"),
   MINECRAFT_1_21_2(768, "1.21.2", "1.21.3"),
   MINECRAFT_1_21_4(769, "1.21.4"),
-  MINECRAFT_1_21_5(770, /*1073742067,*/ "1.21.5");
+  MINECRAFT_1_21_5(770, "1.21.5"),
+  MINECRAFT_1_21_6(771, "1.21.6"),
+  MINECRAFT_1_21_7(772, "1.21.7", "1.21.8");
 
   private static final int SNAPSHOT_BIT = 30;
 

api/src/main/java/com/velocitypowered/api/proxy/messages/MinecraftChannelIdentifier.java

@@ -11,7 +11,6 @@ import static com.google.common.base.Preconditions.checkArgument;
 
 import com.google.common.base.Strings;
 import java.util.Objects;
-import java.util.regex.Pattern;
 import net.kyori.adventure.key.Key;
 import org.checkerframework.checker.nullness.qual.Nullable;
 
@@ -21,8 +20,6 @@ import org.checkerframework.checker.nullness.qual.Nullable;
  */
 public final class MinecraftChannelIdentifier implements ChannelIdentifier {
 
-  private static final Pattern VALID_IDENTIFIER_REGEX = Pattern.compile("[a-z0-9/\\-_]*");
-
   private final String namespace;
   private final String name;
 
@@ -39,7 +36,7 @@ public final class MinecraftChannelIdentifier implements ChannelIdentifier {
    * @return a new channel identifier
    */
   public static MinecraftChannelIdentifier forDefaultNamespace(String name) {
-    return new MinecraftChannelIdentifier("minecraft", name);
+    return new MinecraftChannelIdentifier(Key.MINECRAFT_NAMESPACE, name);
   }
 
   /**
@@ -52,14 +49,10 @@ public final class MinecraftChannelIdentifier implements ChannelIdentifier {
   public static MinecraftChannelIdentifier create(String namespace, String name) {
     checkArgument(!Strings.isNullOrEmpty(namespace), "namespace is null or empty");
     checkArgument(name != null, "namespace is null or empty");
-    checkArgument(VALID_IDENTIFIER_REGEX.matcher(namespace).matches(),
+    checkArgument(Key.parseableNamespace(namespace),
-        "namespace is not valid, must match: %s got %s",
+        "namespace is not valid, must match: [a-z0-9_.-] got %s", namespace);
-        VALID_IDENTIFIER_REGEX.toString(),
+    checkArgument(Key.parseableValue(name),
-        namespace);
+        "name is not valid, must match: [a-z0-9/._-] got %s", name);
-    checkArgument(VALID_IDENTIFIER_REGEX.matcher(name).matches(),
-        "name is not valid, must match: %s got %s",
-        VALID_IDENTIFIER_REGEX.toString(),
-        name);
     return new MinecraftChannelIdentifier(namespace, name);
   }
 
@@ -72,10 +65,9 @@ public final class MinecraftChannelIdentifier implements ChannelIdentifier {
   public static MinecraftChannelIdentifier from(String identifier) {
     int colonPos = identifier.indexOf(':');
     if (colonPos == -1) {
-      throw new IllegalArgumentException("Identifier does not contain a colon.");
+      return create(Key.MINECRAFT_NAMESPACE, identifier);
-    }
+    } else if (colonPos == 0) {
-    if (colonPos + 1 == identifier.length()) {
+      return create(Key.MINECRAFT_NAMESPACE, identifier.substring(1));
-      throw new IllegalArgumentException("Identifier is empty.");
     }
     String namespace = identifier.substring(0, colonPos);
     String name = identifier.substring(colonPos + 1);

api/src/main/java/com/velocitypowered/api/proxy/server/ServerPing.java

@@ -31,6 +31,7 @@ public final class ServerPing {
   private final net.kyori.adventure.text.Component description;
   private final @Nullable Favicon favicon;
   private final @Nullable ModInfo modinfo;
+  private final boolean preventsChatReports = true;
 
   public ServerPing(Version version, @Nullable Players players,
       net.kyori.adventure.text.Component description, @Nullable Favicon favicon) {

api/src/test/java/com/velocitypowered/api/proxy/messages/MinecraftChannelIdentifierTest.java

@@ -47,17 +47,25 @@ class MinecraftChannelIdentifierTest {
     create("velocity", "test/test2");
   }
 
+  @Test
+  void fromIdentifierDefaultNamespace() {
+    assertEquals("minecraft", from("test").getNamespace());
+    assertEquals("minecraft", from(":test").getNamespace());
+  }
+
+  @Test
+  void fromIdentifierAllowsEmptyName() {
+    from("minecraft:");
+    from(":");
+    from("");
+  }
+
   @Test
   void fromIdentifierThrowsOnBadValues() {
     assertAll(
-        () -> assertThrows(IllegalArgumentException.class, () -> from("")),
-        () -> assertThrows(IllegalArgumentException.class, () -> from(":")),
-        () -> assertThrows(IllegalArgumentException.class, () -> from(":a")),
-        () -> assertThrows(IllegalArgumentException.class, () -> from("a:")),
         () -> assertThrows(IllegalArgumentException.class, () -> from("hello:$$$$$$")),
+        () -> assertThrows(IllegalArgumentException.class, () -> from("he/llo:wor/ld")),
         () -> assertThrows(IllegalArgumentException.class, () -> from("hello::"))
     );
   }
-
+}
-
-}

build-logic/src/main/kotlin/velocity-init-manifest.gradle.kts

@@ -2,8 +2,15 @@ import org.gradle.jvm.tasks.Jar
 import org.gradle.kotlin.dsl.withType
 import java.io.ByteArrayOutputStream
 
+// This interface is needed as a workaround to get an instance of ExecOperations
+interface Injected {
+    @get:Inject
+    val execOps: ExecOperations
+}
+
 val currentShortRevision = ByteArrayOutputStream().use {
-    exec {
+    val execOps = objects.newInstance<Injected>().execOps
+    execOps.exec {
         executable = "git"
         args = listOf("rev-parse", "HEAD")
         standardOutput = it

build-logic/src/main/kotlin/velocity-publish.gradle.kts

@@ -8,7 +8,7 @@ extensions.configure<PublishingExtension> {
         maven {
             credentials(PasswordCredentials::class.java)
 
-            name = "paper"
+            name = if (version.toString().endsWith("SNAPSHOT")) "paperSnapshots" else "paper" // "paper" is seemingly not defined
             val base = "https://repo.papermc.io/repository/maven"
             val releasesRepoUrl = "$base-releases/"
             val snapshotsRepoUrl = "$base-snapshots/"

build.gradle.kts

@@ -20,11 +20,11 @@ subprojects {
         testImplementation(rootProject.libs.junit)
     }
 
-    tasks {
+    testing.suites.named<JvmTestSuite>("test") {
-        test {
+        useJUnitJupiter()
-            useJUnitPlatform()
+        targets.all {
-            reports {
+            testTask.configure {
-                junitXml.required.set(true)
+                reports.junitXml.required = true
             }
         }
     }

gradle/libs.versions.toml

@@ -2,19 +2,20 @@
 configurate3 = "3.7.3"
 configurate4 = "4.1.2"
 flare = "2.0.1"
-log4j = "2.24.1"
+log4j = "2.24.3"
-netty = "4.1.119.Final"
+netty = "4.2.1.Final"
 
 [plugins]
+fill = "io.papermc.fill.gradle:1.0.3"
 indra-publishing = "net.kyori.indra.publishing:2.0.6"
-shadow = "io.github.goooler.shadow:8.1.5"
+shadow = "com.gradleup.shadow:8.3.6"
 spotless = "com.diffplug.spotless:6.25.0"
 
 [libraries]
-adventure-bom = "net.kyori:adventure-bom:4.19.0"
+adventure-bom = "net.kyori:adventure-bom:4.23.0"
-adventure-text-serializer-json-legacy-impl = "net.kyori:adventure-text-serializer-json-legacy-impl:4.19.0"
+adventure-text-serializer-json-legacy-impl = "net.kyori:adventure-text-serializer-json-legacy-impl:4.23.0"
 adventure-facet = "net.kyori:adventure-platform-facet:4.3.4"
-asm = "org.ow2.asm:asm:9.7.1"
+asm = "org.ow2.asm:asm:9.8"
 auto-service = "com.google.auto.service:auto-service:1.0.1"
 auto-service-annotations = "com.google.auto.service:auto-service-annotations:1.0.1"
 brigadier = "com.velocitypowered:velocity-brigadier:1.0.0-SNAPSHOT"
@@ -33,7 +34,7 @@ disruptor = "com.lmax:disruptor:4.0.0"
 fastutil = "it.unimi.dsi:fastutil:8.5.15"
 flare-core = { module = "space.vectrix.flare:flare", version.ref = "flare" }
 flare-fastutil = { module = "space.vectrix.flare:flare-fastutil", version.ref = "flare" }
-jline = "org.jline:jline-terminal-jansi:3.27.1"
+jline = "org.jline:jline-terminal-jansi:3.30.2"
 jopt = "net.sf.jopt-simple:jopt-simple:5.0.4"
 junit = "org.junit.jupiter:junit-jupiter:5.10.2"
 jspecify = "org.jspecify:jspecify:0.3.0"
@@ -54,8 +55,9 @@ netty-codec-http = { module = "io.netty:netty-codec-http", version.ref = "netty"
 netty-handler = { module = "io.netty:netty-handler", version.ref = "netty" }
 netty-transport-native-epoll = { module = "io.netty:netty-transport-native-epoll", version.ref = "netty" }
 netty-transport-native-kqueue = { module = "io.netty:netty-transport-native-kqueue", version.ref = "netty" }
+netty-transport-native-iouring = { module = "io.netty:netty-transport-native-io_uring", version.ref = "netty" }
 nightconfig = "com.electronwill.night-config:toml:3.6.7"
-slf4j = "org.slf4j:slf4j-api:2.0.12"
+slf4j = "org.slf4j:slf4j-api:2.0.17"
 snakeyaml = "org.yaml:snakeyaml:1.33"
 spotbugs-annotations = "com.github.spotbugs:spotbugs-annotations:4.7.3"
 terminalconsoleappender = "net.minecrell:terminalconsoleappender:1.3.0"

gradle/wrapper/gradle-wrapper.properties

@@ -1,6 +1,6 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-8.11.1-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.14.2-bin.zip
 networkTimeout=10000
 validateDistributionUrl=true
 zipStoreBase=GRADLE_USER_HOME

proxy/build.gradle.kts

@@ -1,9 +1,11 @@
 import com.github.jengelman.gradle.plugins.shadow.transformers.Log4j2PluginsCacheFileTransformer
+import io.papermc.fill.model.BuildChannel
 
 plugins {
     application
     id("velocity-init-manifest")
     alias(libs.plugins.shadow)
+    alias(libs.plugins.fill)
 }
 
 application {
@@ -100,6 +102,7 @@ tasks {
     runShadow {
         workingDir = file("run").also(File::mkdirs)
         standardInput = System.`in`
+        jvmArgs("-Dvelocity.packet-decode-logging=true")
     }
     named<JavaExec>("run") {
         workingDir = file("run").also(File::mkdirs)
@@ -107,6 +110,24 @@ tasks {
     }
 }
 
+val projectVersion = version as String
+fill {
+    project("velocity")
+
+    build {
+        channel = BuildChannel.STABLE
+        versionFamily("3.0.0")
+        version(projectVersion)
+
+        downloads {
+            register("server:default") {
+                file = tasks.shadowJar.flatMap { it.archiveFile }
+                nameResolver.set { project, _, version, build -> "$project-$version-$build.jar" }
+            }
+        }
+    }
+}
+
 dependencies {
     implementation(project(":velocity-api"))
     implementation(project(":velocity-native"))
@@ -121,6 +142,9 @@ dependencies {
     implementation(libs.netty.transport.native.epoll)
     implementation(variantOf(libs.netty.transport.native.epoll) { classifier("linux-x86_64") })
     implementation(variantOf(libs.netty.transport.native.epoll) { classifier("linux-aarch_64") })
+    implementation(libs.netty.transport.native.iouring)
+    implementation(variantOf(libs.netty.transport.native.iouring) { classifier("linux-x86_64") })
+    implementation(variantOf(libs.netty.transport.native.iouring) { classifier("linux-aarch_64") })
     implementation(libs.netty.transport.native.kqueue)
     implementation(variantOf(libs.netty.transport.native.kqueue) { classifier("osx-x86_64") })
     implementation(variantOf(libs.netty.transport.native.kqueue) { classifier("osx-aarch_64") })

proxy/src/main/java/com/velocitypowered/proxy/Velocity.java

@@ -47,6 +47,11 @@ public class Velocity {
       System.setProperty("io.netty.native.workdir", System.getProperty("velocity.natives-tmpdir"));
     }
 
+    // Restore allocator used before Netty 4.2 due to oom issues with the adaptive allocator
+    if (System.getProperty("io.netty.allocator.type") == null) {
+      System.setProperty("io.netty.allocator.type", "pooled");
+    }
+
     // Disable the resource leak detector by default as it reduces performance. Allow the user to
     // override this if desired.
     if (!VelocityProperties.hasProperty("io.netty.leakDetection.level")) {

proxy/src/main/java/com/velocitypowered/proxy/VelocityServer.java

@@ -81,6 +81,7 @@ import java.net.http.HttpClient;
 import java.nio.file.Files;
 import java.nio.file.Path;
 import java.security.KeyPair;
+import java.text.MessageFormat;
 import java.util.ArrayList;
 import java.util.Collection;
 import java.util.Collections;
@@ -104,7 +105,7 @@ import net.kyori.adventure.audience.ForwardingAudience;
 import net.kyori.adventure.key.Key;
 import net.kyori.adventure.text.Component;
 import net.kyori.adventure.translation.GlobalTranslator;
-import net.kyori.adventure.translation.TranslationRegistry;
+import net.kyori.adventure.translation.TranslationStore;
 import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
 import org.bstats.MetricsBase;
@@ -337,8 +338,8 @@ public class VelocityServer implements ProxyServer, ForwardingAudience {
   }
 
   private void registerTranslations() {
-    final TranslationRegistry translationRegistry = TranslationRegistry
+    final TranslationStore.StringBased<MessageFormat> translationRegistry =
-        .create(Key.key("velocity", "translations"));
+            TranslationStore.messageFormat(Key.key("velocity", "translations"));
     translationRegistry.defaultLocale(Locale.US);
     try {
       ResourceUtils.visitResources(VelocityServer.class, path -> {

proxy/src/main/java/com/velocitypowered/proxy/command/VelocityCommandManager.java

@@ -300,27 +300,14 @@ public class VelocityCommandManager implements CommandManager {
     );
   }
 
-  /**
+  @Override
-   * Returns suggestions to fill in the given command.
-   *
-   * @param source  the source to execute the command for
-   * @param cmdLine the partially completed command
-   * @return a {@link CompletableFuture} eventually completed with a {@link List}, possibly empty
-   */
   public CompletableFuture<List<String>> offerSuggestions(final CommandSource source,
       final String cmdLine) {
     return offerBrigadierSuggestions(source, cmdLine)
         .thenApply(suggestions -> Lists.transform(suggestions.getList(), Suggestion::getText));
   }
 
-  /**
+  @Override
-   * Returns suggestions to fill in the given command.
-   *
-   * @param source  the source to execute the command for
-   * @param cmdLine the partially completed command
-   * @return a {@link CompletableFuture} eventually completed with {@link Suggestions}, possibly
-   *         empty
-   */
   public CompletableFuture<Suggestions> offerBrigadierSuggestions(
       final CommandSource source, final String cmdLine) {
     Preconditions.checkNotNull(source, "source");

proxy/src/main/java/com/velocitypowered/proxy/connection/MinecraftConnection.java

@@ -46,6 +46,7 @@ import com.velocitypowered.proxy.protocol.netty.MinecraftCompressDecoder;
 import com.velocitypowered.proxy.protocol.netty.MinecraftCompressorAndLengthEncoder;
 import com.velocitypowered.proxy.protocol.netty.MinecraftDecoder;
 import com.velocitypowered.proxy.protocol.netty.MinecraftEncoder;
+import com.velocitypowered.proxy.protocol.netty.MinecraftVarintFrameDecoder;
 import com.velocitypowered.proxy.protocol.netty.MinecraftVarintLengthEncoder;
 import com.velocitypowered.proxy.protocol.netty.PlayPacketQueueInboundHandler;
 import com.velocitypowered.proxy.protocol.netty.PlayPacketQueueOutboundHandler;
@@ -84,6 +85,7 @@ public class MinecraftConnection extends ChannelInboundHandlerAdapter {
   private static final Logger logger = LogManager.getLogger(MinecraftConnection.class);
 
   private final Channel channel;
+  public boolean pendingConfigurationSwitch = false;
   private SocketAddress remoteAddress;
   private StateRegistry state;
   private Map<StateRegistry, MinecraftSessionHandler> sessionHandlers;
@@ -367,6 +369,11 @@ public class MinecraftConnection extends ChannelInboundHandlerAdapter {
     ensureInEventLoop();
 
     this.state = state;
+    final MinecraftVarintFrameDecoder frameDecoder = this.channel.pipeline()
+        .get(MinecraftVarintFrameDecoder.class);
+    if (frameDecoder != null) {
+      frameDecoder.setState(state);
+    }
     // If the connection is LEGACY (<1.6), the decoder and encoder are not set.
     final MinecraftEncoder minecraftEncoder = this.channel.pipeline()
         .get(MinecraftEncoder.class);

proxy/src/main/java/com/velocitypowered/proxy/connection/backend/BackendPlaySessionHandler.java

@@ -34,6 +34,8 @@ import com.velocitypowered.api.event.player.ServerResourcePackSendEvent;
 import com.velocitypowered.api.event.proxy.ProxyPingEvent;
 import com.velocitypowered.api.network.ProtocolVersion;
 import com.velocitypowered.api.proxy.messages.ChannelIdentifier;
+import com.velocitypowered.api.proxy.messages.LegacyChannelIdentifier;
+import com.velocitypowered.api.proxy.messages.MinecraftChannelIdentifier;
 import com.velocitypowered.api.proxy.player.ResourcePackInfo;
 import com.velocitypowered.proxy.VelocityServer;
 import com.velocitypowered.proxy.command.CommandGraphInjector;
@@ -47,6 +49,7 @@ import com.velocitypowered.proxy.connection.util.ConnectionMessages;
 import com.velocitypowered.proxy.protocol.MinecraftPacket;
 import com.velocitypowered.proxy.protocol.StateRegistry;
 import com.velocitypowered.proxy.protocol.netty.MinecraftDecoder;
+import com.velocitypowered.proxy.protocol.netty.MinecraftVarintFrameDecoder;
 import com.velocitypowered.proxy.protocol.packet.AvailableCommandsPacket;
 import com.velocitypowered.proxy.protocol.packet.BossBarPacket;
 import com.velocitypowered.proxy.protocol.packet.BundleDelimiterPacket;
@@ -149,6 +152,7 @@ public class BackendPlaySessionHandler implements MinecraftSessionHandler {
     MinecraftConnection smc = serverConn.ensureConnected();
     smc.setAutoReading(false);
     // Even when not auto reading messages are still decoded. Decode them with the correct state
+    smc.getChannel().pipeline().get(MinecraftVarintFrameDecoder.class).setState(StateRegistry.CONFIG);
     smc.getChannel().pipeline().get(MinecraftDecoder.class).setState(StateRegistry.CONFIG);
     serverConn.getPlayer().switchToConfigState();
     return true;
@@ -288,31 +292,14 @@ public class BackendPlaySessionHandler implements MinecraftSessionHandler {
       return true;
     }
 
-    // Register and unregister packets are simply forwarded to the server as-is.
-    if (PluginMessageUtil.isRegister(packet) || PluginMessageUtil.isUnregister(packet)) {
-      return false;
-    }
-
-    if (PluginMessageUtil.isMcBrand(packet)) {
-      PluginMessagePacket rewritten = PluginMessageUtil
-              .rewriteMinecraftBrand(packet,
-                      server.getVersion(), playerConnection.getProtocolVersion());
-      playerConnection.write(rewritten);
-      return true;
-    }
-
     if (serverConn.getPhase().handle(serverConn, serverConn.getPlayer(), packet)) {
       // Handled.
       return true;
     }
 
-    ChannelIdentifier id = server.getChannelRegistrar().getFromId(packet.getChannel());
-    if (id == null) {
-      return false;
-    }
-
     byte[] copy = ByteBufUtil.getBytes(packet.content());
-    PluginMessageEvent event = new PluginMessageEvent(serverConn, serverConn.getPlayer(), id, copy);
+    String channel = packet.getChannel();
+    PluginMessageEvent event = new PluginMessageEvent(serverConn, serverConn.getPlayer(), channel.indexOf(':') == -1 ? new LegacyChannelIdentifier(channel) : MinecraftChannelIdentifier.from(channel), copy);
     server.getEventManager().fire(event).thenAcceptAsync(pme -> {
       if (pme.getResult().isAllowed() && !playerConnection.isClosed()) {
         PluginMessagePacket copied = new PluginMessagePacket(

proxy/src/main/java/com/velocitypowered/proxy/connection/backend/ConfigSessionHandler.java

@@ -40,6 +40,7 @@ import com.velocitypowered.proxy.connection.util.ConnectionRequestResults.Impl;
 import com.velocitypowered.proxy.protocol.MinecraftPacket;
 import com.velocitypowered.proxy.protocol.StateRegistry;
 import com.velocitypowered.proxy.protocol.netty.MinecraftDecoder;
+import com.velocitypowered.proxy.protocol.netty.MinecraftVarintFrameDecoder;
 import com.velocitypowered.proxy.protocol.packet.ClientboundCookieRequestPacket;
 import com.velocitypowered.proxy.protocol.packet.ClientboundStoreCookiePacket;
 import com.velocitypowered.proxy.protocol.packet.DisconnectPacket;
@@ -232,6 +233,7 @@ public class ConfigSessionHandler implements MinecraftSessionHandler {
     final ConnectedPlayer player = serverConn.getPlayer();
     final ClientConfigSessionHandler configHandler = (ClientConfigSessionHandler) player.getConnection().getActiveSessionHandler();
 
+    smc.getChannel().pipeline().get(MinecraftVarintFrameDecoder.class).setState(StateRegistry.PLAY);
     smc.getChannel().pipeline().get(MinecraftDecoder.class).setState(StateRegistry.PLAY);
     //noinspection DataFlowIssue
     configHandler.handleBackendFinishUpdate(serverConn).thenRunAsync(() -> {

proxy/src/main/java/com/velocitypowered/proxy/connection/client/ClientConfigSessionHandler.java

@@ -170,7 +170,11 @@ public class ClientConfigSessionHandler implements MinecraftSessionHandler {
   @Override
   public boolean handle(KnownPacksPacket packet) {
     callConfigurationEvent().thenRun(() -> {
-      player.getConnectionInFlightOrConnectedServer().ensureConnected().write(packet);
+      VelocityServerConnection targetServer =
+          player.getConnectionInFlightOrConnectedServer();
+      if (targetServer != null) {
+        targetServer.ensureConnected().write(packet);
+      }
     }).exceptionally(ex -> {
       logger.error("Error forwarding known packs response to backend:", ex);
       return null;

proxy/src/main/java/com/velocitypowered/proxy/connection/client/ClientPlaySessionHandler.java

@@ -30,6 +30,8 @@ import com.velocitypowered.api.event.player.TabCompleteEvent;
 import com.velocitypowered.api.event.player.configuration.PlayerEnteredConfigurationEvent;
 import com.velocitypowered.api.network.ProtocolVersion;
 import com.velocitypowered.api.proxy.messages.ChannelIdentifier;
+import com.velocitypowered.api.proxy.messages.LegacyChannelIdentifier;
+import com.velocitypowered.api.proxy.messages.MinecraftChannelIdentifier;
 import com.velocitypowered.proxy.VelocityServer;
 import com.velocitypowered.proxy.connection.ConnectionTypes;
 import com.velocitypowered.proxy.connection.MinecraftConnection;
@@ -72,6 +74,7 @@ import com.velocitypowered.proxy.protocol.packet.config.FinishedUpdatePacket;
 import com.velocitypowered.proxy.protocol.packet.title.GenericTitlePacket;
 import com.velocitypowered.proxy.protocol.util.PluginMessageUtil;
 import com.velocitypowered.proxy.util.CharacterUtil;
+import com.velocitypowered.proxy.util.except.QuietRuntimeException;
 import io.netty.buffer.ByteBuf;
 import io.netty.buffer.ByteBufUtil;
 import io.netty.buffer.Unpooled;
@@ -308,14 +311,17 @@ public class ClientPlaySessionHandler implements MinecraftSessionHandler {
         logger.warn("A plugin message was received while the backend server was not "
             + "ready. Channel: {}. Packet discarded.", packet.getChannel());
       } else if (PluginMessageUtil.isRegister(packet)) {
-        List<ChannelIdentifier> channels = PluginMessageUtil.getChannels(packet, this.player.getProtocolVersion());
+        List<ChannelIdentifier> channels =
+            PluginMessageUtil.getChannels(this.player.getClientsideChannels().size(), packet,
+                this.player.getProtocolVersion());
         player.getClientsideChannels().addAll(channels);
         server.getEventManager()
             .fireAndForget(
                 new PlayerChannelRegisterEvent(player, ImmutableList.copyOf(channels)));
         backendConn.write(packet.retain());
       } else if (PluginMessageUtil.isUnregister(packet)) {
-        player.getClientsideChannels().removeAll(PluginMessageUtil.getChannels(packet, this.player.getProtocolVersion()));
+        player.getClientsideChannels()
+            .removeAll(PluginMessageUtil.getChannels(0, packet, this.player.getProtocolVersion()));
         backendConn.write(packet.retain());
       } else if (PluginMessageUtil.isMcBrand(packet)) {
         String brand = PluginMessageUtil.readBrandMessage(packet.content());
@@ -335,43 +341,25 @@ public class ClientPlaySessionHandler implements MinecraftSessionHandler {
         }
 
         if (!player.getPhase().handle(player, packet, serverConn)) {
-          ChannelIdentifier id = server.getChannelRegistrar().getFromId(packet.getChannel());
+          byte[] copy = ByteBufUtil.getBytes(packet.content());
-          if (id == null) {
+          String channel = packet.getChannel();
-            // We don't have any plugins listening on this channel, process the packet now.
+          PluginMessageEvent event = new PluginMessageEvent(player, serverConn, channel.indexOf(':') == -1 ? new LegacyChannelIdentifier(channel) : MinecraftChannelIdentifier.from(channel), copy);
-            if (!player.getPhase().consideredComplete() || !serverConn.getPhase()
+          server.getEventManager().fire(event).thenAcceptAsync(pme -> {
-                .consideredComplete()) {
+            if (pme.getResult().isAllowed()) {
-              // The client is trying to send messages too early. This is primarily caused by mods,
+              PluginMessagePacket message = new PluginMessagePacket(packet.getChannel(),
-              // but further aggravated by Velocity. To work around these issues, we will queue any
+                      Unpooled.wrappedBuffer(copy));
-              // non-FML handshake messages to be sent once the FML handshake has completed or the
+              if (!player.getPhase().consideredComplete() || !serverConn.getPhase()
-              // JoinGame packet has been received by the proxy, whichever comes first.
+                      .consideredComplete()) {
-              //
+                // We're still processing the connection (see above), enqueue the packet for now.
-              // We also need to make sure to retain these packets, so they can be flushed
+                loginPluginMessages.add(message.retain());
-              // appropriately.
+              } else {
-              loginPluginMessages.add(packet.retain());
+                backendConn.write(message);
-            } else {
-              // The connection is ready, send the packet now.
-              backendConn.write(packet.retain());
-            }
-          } else {
-            byte[] copy = ByteBufUtil.getBytes(packet.content());
-            PluginMessageEvent event = new PluginMessageEvent(player, serverConn, id, copy);
-            server.getEventManager().fire(event).thenAcceptAsync(pme -> {
-              if (pme.getResult().isAllowed()) {
-                PluginMessagePacket message = new PluginMessagePacket(packet.getChannel(),
-                    Unpooled.wrappedBuffer(copy));
-                if (!player.getPhase().consideredComplete() || !serverConn.getPhase()
-                    .consideredComplete()) {
-                  // We're still processing the connection (see above), enqueue the packet for now.
-                  loginPluginMessages.add(message.retain());
-                } else {
-                  backendConn.write(message);
-                }
               }
-            }, backendConn.eventLoop()).exceptionally((ex) -> {
+            }
-              logger.error("Exception while handling plugin message packet for {}", player, ex);
+          }, backendConn.eventLoop()).exceptionally((ex) -> {
-              return null;
+            logger.error("Exception while handling plugin message packet for {}", player, ex);
-            });
+            return null;
-          }
+          });
         }
       }
     }
@@ -389,10 +377,14 @@ public class ClientPlaySessionHandler implements MinecraftSessionHandler {
 
   @Override
   public boolean handle(FinishedUpdatePacket packet) {
+    if (!player.getConnection().pendingConfigurationSwitch) {
+      throw new QuietRuntimeException("Not expecting reconfiguration");
+    }
     // Complete client switch
     player.getConnection().setActiveSessionHandler(StateRegistry.CONFIG);
     VelocityServerConnection serverConnection = player.getConnectedServer();
-    server.getEventManager().fireAndForget(new PlayerEnteredConfigurationEvent(player, serverConnection));
+    server.getEventManager()
+        .fireAndForget(new PlayerEnteredConfigurationEvent(player, serverConnection));
     if (serverConnection != null) {
       MinecraftConnection smc = serverConnection.ensureConnected();
       CompletableFuture.runAsync(() -> {

proxy/src/main/java/com/velocitypowered/proxy/connection/client/ConnectedPlayer.java

@@ -123,6 +123,7 @@ import net.kyori.adventure.permission.PermissionChecker;
 import net.kyori.adventure.platform.facet.FacetPointers;
 import net.kyori.adventure.platform.facet.FacetPointers.Type;
 import net.kyori.adventure.pointer.Pointers;
+import net.kyori.adventure.pointer.PointersSupplier;
 import net.kyori.adventure.resource.ResourcePackInfoLike;
 import net.kyori.adventure.resource.ResourcePackRequest;
 import net.kyori.adventure.resource.ResourcePackRequestLike;
@@ -145,14 +146,23 @@ import org.jetbrains.annotations.NotNull;
 public class ConnectedPlayer implements MinecraftConnectionAssociation, Player, KeyIdentifiable,
     VelocityInboundConnection {
 
-  private static final int MAX_CLIENTSIDE_PLUGIN_CHANNELS = 1024;
+  public static final int MAX_CLIENTSIDE_PLUGIN_CHANNELS = Integer.getInteger("velocity.max-clientside-plugin-channels", 1024);
   private static final PlainTextComponentSerializer PASS_THRU_TRANSLATE =
       PlainTextComponentSerializer.builder().flattener(TranslatableMapper.FLATTENER).build();
   static final PermissionProvider DEFAULT_PERMISSIONS = s -> PermissionFunction.ALWAYS_UNDEFINED;
 
   private static final ComponentLogger logger = ComponentLogger.logger(ConnectedPlayer.class);
 
-  private final Identity identity = new IdentityImpl();
+  private static final @NotNull PointersSupplier<ConnectedPlayer> POINTERS_SUPPLIER =
+          PointersSupplier.<ConnectedPlayer>builder()
+                  .resolving(Identity.UUID, Player::getUniqueId)
+                  .resolving(Identity.NAME, Player::getUsername)
+                  .resolving(Identity.DISPLAY_NAME, player -> Component.text(player.getUsername()))
+                  .resolving(Identity.LOCALE, Player::getEffectiveLocale)
+                  .resolving(PermissionChecker.POINTER, Player::getPermissionChecker)
+                  .resolving(FacetPointers.TYPE, player -> Type.PLAYER)
+                  .build();
+
   /**
    * The actual Minecraft connection. This is actually a wrapper object around the Netty channel.
    */
@@ -181,14 +191,6 @@ public class ConnectedPlayer implements MinecraftConnectionAssociation, Player,
   private final ResourcePackHandler resourcePackHandler;
   private final BundleDelimiterHandler bundleHandler = new BundleDelimiterHandler(this);
 
-  private final @NotNull Pointers pointers =
-      Player.super.pointers().toBuilder()
-          .withDynamic(Identity.UUID, this::getUniqueId)
-          .withDynamic(Identity.NAME, this::getUsername)
-          .withDynamic(Identity.DISPLAY_NAME, () -> Component.text(this.getUsername()))
-          .withDynamic(Identity.LOCALE, this::getEffectiveLocale)
-          .withStatic(PermissionChecker.POINTER, getPermissionChecker())
-          .withStatic(FacetPointers.TYPE, Type.PLAYER).build();
   private @Nullable String clientBrand;
   private @Nullable Locale effectiveLocale;
   private final @Nullable IdentifiedKey playerKey;
@@ -257,7 +259,7 @@ public class ConnectedPlayer implements MinecraftConnectionAssociation, Player,
 
   @Override
   public @NonNull Identity identity() {
-    return this.identity;
+    return Identity.identity(this.getUniqueId());
   }
 
   @Override
@@ -363,7 +365,7 @@ public class ConnectedPlayer implements MinecraftConnectionAssociation, Player,
 
   @Override
   public @NotNull Pointers pointers() {
-    return this.pointers;
+    return POINTERS_SUPPLIER.view(this);
   }
 
   @Override
@@ -396,14 +398,20 @@ public class ConnectedPlayer implements MinecraftConnectionAssociation, Player,
   }
 
   /**
-   * Translates the message in the user's locale.
+   * Translates the message in the user's locale, falling back to the default locale if not set.
    *
    * @param message the message to translate
    * @return the translated message
    */
   public Component translateMessage(Component message) {
-    Locale locale = ClosestLocaleMatcher.INSTANCE
+    Locale locale = this.getEffectiveLocale();
-        .lookupClosest(getEffectiveLocale() == null ? Locale.getDefault() : getEffectiveLocale());
+    if (locale == null && settings != null) {
+      locale = settings.getLocale();
+    }
+    if (locale == null) {
+      locale = Locale.getDefault();
+    }
+    locale = ClosestLocaleMatcher.INSTANCE.lookupClosest(locale);
     return GlobalTranslator.render(message, locale);
   }
 
@@ -1318,6 +1326,7 @@ public class ConnectedPlayer implements MinecraftConnectionAssociation, Player,
             connection.write(BundleDelimiterPacket.INSTANCE);
           }
           connection.write(StartUpdatePacket.INSTANCE);
+          connection.pendingConfigurationSwitch = true;
           connection.getChannel().pipeline().get(MinecraftEncoder.class).setState(StateRegistry.CONFIG);
           // Make sure we don't send any play packets to the player after update start
           connection.addPlayPacketQueueHandler();
@@ -1360,14 +1369,6 @@ public class ConnectedPlayer implements MinecraftConnectionAssociation, Player,
     return playerKey;
   }
 
-  private class IdentityImpl implements Identity {
-
-    @Override
-    public @NonNull UUID uuid() {
-      return ConnectedPlayer.this.getUniqueId();
-    }
-  }
-
   @Override
   public ProtocolState getProtocolState() {
     return connection.getState().toProtocolState();

proxy/src/main/java/com/velocitypowered/proxy/network/BackendChannelInitializer.java

@@ -51,7 +51,7 @@ public class BackendChannelInitializer extends ChannelInitializer<Channel> {
   @Override
   protected void initChannel(Channel ch) {
     ch.pipeline()
-        .addLast(FRAME_DECODER, new MinecraftVarintFrameDecoder())
+        .addLast(FRAME_DECODER, new MinecraftVarintFrameDecoder(ProtocolUtils.Direction.CLIENTBOUND))
         .addLast(READ_TIMEOUT,
             new ReadTimeoutHandler(server.getConfiguration().getReadTimeout(),
                 TimeUnit.MILLISECONDS))

proxy/src/main/java/com/velocitypowered/proxy/network/ServerChannelInitializer.java

@@ -58,7 +58,7 @@ public class ServerChannelInitializer extends ChannelInitializer<Channel> {
   protected void initChannel(final Channel ch) {
     ch.pipeline()
         .addLast(LEGACY_PING_DECODER, new LegacyPingDecoder())
-        .addLast(FRAME_DECODER, new MinecraftVarintFrameDecoder())
+        .addLast(FRAME_DECODER, new MinecraftVarintFrameDecoder(ProtocolUtils.Direction.SERVERBOUND))
         .addLast(READ_TIMEOUT,
             new ReadTimeoutHandler(this.server.getConfiguration().getReadTimeout(),
                 TimeUnit.MILLISECONDS))

proxy/src/main/java/com/velocitypowered/proxy/network/TransportType.java

@@ -20,25 +20,32 @@ package com.velocitypowered.proxy.network;
 import com.velocitypowered.proxy.util.concurrent.VelocityNettyThreadFactory;
 import io.netty.channel.ChannelFactory;
 import io.netty.channel.EventLoopGroup;
+import io.netty.channel.IoHandlerFactory;
+import io.netty.channel.MultiThreadIoEventLoopGroup;
 import io.netty.channel.epoll.Epoll;
 import io.netty.channel.epoll.EpollDatagramChannel;
-import io.netty.channel.epoll.EpollEventLoopGroup;
+import io.netty.channel.epoll.EpollIoHandler;
 import io.netty.channel.epoll.EpollServerSocketChannel;
 import io.netty.channel.epoll.EpollSocketChannel;
 import io.netty.channel.kqueue.KQueue;
 import io.netty.channel.kqueue.KQueueDatagramChannel;
-import io.netty.channel.kqueue.KQueueEventLoopGroup;
+import io.netty.channel.kqueue.KQueueIoHandler;
 import io.netty.channel.kqueue.KQueueServerSocketChannel;
 import io.netty.channel.kqueue.KQueueSocketChannel;
-import io.netty.channel.nio.NioEventLoopGroup;
+import io.netty.channel.nio.NioIoHandler;
 import io.netty.channel.socket.DatagramChannel;
 import io.netty.channel.socket.ServerSocketChannel;
 import io.netty.channel.socket.SocketChannel;
 import io.netty.channel.socket.nio.NioDatagramChannel;
 import io.netty.channel.socket.nio.NioServerSocketChannel;
 import io.netty.channel.socket.nio.NioSocketChannel;
+import io.netty.channel.uring.IoUring;
+import io.netty.channel.uring.IoUringDatagramChannel;
+import io.netty.channel.uring.IoUringIoHandler;
+import io.netty.channel.uring.IoUringServerSocketChannel;
+import io.netty.channel.uring.IoUringSocketChannel;
 import java.util.concurrent.ThreadFactory;
-import java.util.function.BiFunction;
+import java.util.function.Supplier;
 
 /**
  * Enumerates the supported transports for Velocity.
@@ -47,32 +54,36 @@ public enum TransportType {
   NIO("NIO", NioServerSocketChannel::new,
       NioSocketChannel::new,
       NioDatagramChannel::new,
-      (name, type) -> new NioEventLoopGroup(0, createThreadFactory(name, type))),
+      NioIoHandler::newFactory),
   EPOLL("epoll", EpollServerSocketChannel::new,
       EpollSocketChannel::new,
       EpollDatagramChannel::new,
-      (name, type) -> new EpollEventLoopGroup(0, createThreadFactory(name, type))),
+      EpollIoHandler::newFactory),
   KQUEUE("kqueue", KQueueServerSocketChannel::new,
       KQueueSocketChannel::new,
       KQueueDatagramChannel::new,
-      (name, type) -> new KQueueEventLoopGroup(0, createThreadFactory(name, type)));
+      KQueueIoHandler::newFactory),
+  IO_URING("io_uring", IoUringServerSocketChannel::new,
+      IoUringSocketChannel::new,
+      IoUringDatagramChannel::new,
+      IoUringIoHandler::newFactory);
 
   final String name;
   final ChannelFactory<? extends ServerSocketChannel> serverSocketChannelFactory;
   final ChannelFactory<? extends SocketChannel> socketChannelFactory;
   final ChannelFactory<? extends DatagramChannel> datagramChannelFactory;
-  final BiFunction<String, Type, EventLoopGroup> eventLoopGroupFactory;
+  final Supplier<IoHandlerFactory> ioHandlerFactorySupplier;
 
   TransportType(final String name,
       final ChannelFactory<? extends ServerSocketChannel> serverSocketChannelFactory,
       final ChannelFactory<? extends SocketChannel> socketChannelFactory,
       final ChannelFactory<? extends DatagramChannel> datagramChannelFactory,
-      final BiFunction<String, Type, EventLoopGroup> eventLoopGroupFactory) {
+      final Supplier<IoHandlerFactory> ioHandlerFactorySupplier) {
     this.name = name;
     this.serverSocketChannelFactory = serverSocketChannelFactory;
     this.socketChannelFactory = socketChannelFactory;
     this.datagramChannelFactory = datagramChannelFactory;
-    this.eventLoopGroupFactory = eventLoopGroupFactory;
+    this.ioHandlerFactorySupplier = ioHandlerFactorySupplier;
   }
 
   @Override
@@ -80,8 +91,15 @@ public enum TransportType {
     return this.name;
   }
 
+  /**
+   * Creates a new event loop group for the given type.
+   *
+   * @param type the type of event loop group to create
+   * @return the event loop group
+   */
   public EventLoopGroup createEventLoopGroup(final Type type) {
-    return this.eventLoopGroupFactory.apply(this.name, type);
+    return new MultiThreadIoEventLoopGroup(
+        0, createThreadFactory(this.name, type), this.ioHandlerFactorySupplier.get());
   }
 
   private static ThreadFactory createThreadFactory(final String name, final Type type) {
@@ -98,6 +116,10 @@ public enum TransportType {
       return NIO;
     }
 
+    if (IoUring.isAvailable() && Boolean.getBoolean("velocity.enable-iouring-transport")) {
+      return IO_URING;
+    }
+
     if (Epoll.isAvailable()) {
       return EPOLL;
     }

proxy/src/main/java/com/velocitypowered/proxy/protocol/ProtocolUtils.java

@@ -47,7 +47,7 @@ import net.kyori.adventure.nbt.CompoundBinaryTag;
 import net.kyori.adventure.text.serializer.gson.GsonComponentSerializer;
 import net.kyori.adventure.text.serializer.json.JSONOptions;
 import net.kyori.adventure.text.serializer.json.legacyimpl.NBTLegacyHoverEventSerializer;
-import net.kyori.option.OptionState;
+import net.kyori.option.OptionSchema;
 
 /**
  * Utilities for writing and reading data in the Minecraft protocol.
@@ -60,14 +60,17 @@ public enum ProtocolUtils {
           .downsampleColors()
           .legacyHoverEventSerializer(NBTLegacyHoverEventSerializer.get())
           .options(
-              OptionState.optionState()
+              OptionSchema.globalSchema().stateBuilder()
               // before 1.16
               .value(JSONOptions.EMIT_RGB, Boolean.FALSE)
-              .value(JSONOptions.EMIT_HOVER_EVENT_TYPE, JSONOptions.HoverEventValueMode.LEGACY_ONLY)
+              .value(JSONOptions.EMIT_HOVER_EVENT_TYPE, JSONOptions.HoverEventValueMode.VALUE_FIELD)
+              .value(JSONOptions.EMIT_CLICK_EVENT_TYPE, JSONOptions.ClickEventValueMode.CAMEL_CASE)
               // before 1.20.3
               .value(JSONOptions.EMIT_COMPACT_TEXT_COMPONENT, Boolean.FALSE)
               .value(JSONOptions.EMIT_HOVER_SHOW_ENTITY_ID_AS_INT_ARRAY, Boolean.FALSE)
               .value(JSONOptions.VALIDATE_STRICT_EVENTS, Boolean.FALSE)
+              // before 1.21.5
+              .value(JSONOptions.EMIT_CHANGE_PAGE_CLICK_EVENT_PAGE_AS_STRING, Boolean.TRUE)
               .build()
           )
           .build();
@@ -75,14 +78,37 @@ public enum ProtocolUtils {
           GsonComponentSerializer.builder()
           .legacyHoverEventSerializer(NBTLegacyHoverEventSerializer.get())
           .options(
-              OptionState.optionState()
+              OptionSchema.globalSchema().stateBuilder()
               // after 1.16
               .value(JSONOptions.EMIT_RGB, Boolean.TRUE)
-              .value(JSONOptions.EMIT_HOVER_EVENT_TYPE, JSONOptions.HoverEventValueMode.MODERN_ONLY)
+              .value(JSONOptions.EMIT_HOVER_EVENT_TYPE, JSONOptions.HoverEventValueMode.CAMEL_CASE)
+              .value(JSONOptions.EMIT_CLICK_EVENT_TYPE, JSONOptions.ClickEventValueMode.CAMEL_CASE)
+              .value(JSONOptions.EMIT_HOVER_SHOW_ENTITY_KEY_AS_TYPE_AND_UUID_AS_ID, true)
               // before 1.20.3
               .value(JSONOptions.EMIT_COMPACT_TEXT_COMPONENT, Boolean.FALSE)
               .value(JSONOptions.EMIT_HOVER_SHOW_ENTITY_ID_AS_INT_ARRAY, Boolean.FALSE)
               .value(JSONOptions.VALIDATE_STRICT_EVENTS, Boolean.FALSE)
+              // before 1.21.5
+              .value(JSONOptions.EMIT_CHANGE_PAGE_CLICK_EVENT_PAGE_AS_STRING, Boolean.TRUE)
+              .build()
+          )
+          .build();
+  private static final GsonComponentSerializer PRE_1_21_5_SERIALIZER =
+      GsonComponentSerializer.builder()
+          .legacyHoverEventSerializer(NBTLegacyHoverEventSerializer.get())
+          .options(
+              OptionSchema.globalSchema().stateBuilder()
+              // after 1.16
+              .value(JSONOptions.EMIT_RGB, Boolean.TRUE)
+              .value(JSONOptions.EMIT_HOVER_EVENT_TYPE, JSONOptions.HoverEventValueMode.CAMEL_CASE)
+              .value(JSONOptions.EMIT_CLICK_EVENT_TYPE, JSONOptions.ClickEventValueMode.CAMEL_CASE)
+              .value(JSONOptions.EMIT_HOVER_SHOW_ENTITY_KEY_AS_TYPE_AND_UUID_AS_ID, true)
+              // after 1.20.3
+              .value(JSONOptions.EMIT_COMPACT_TEXT_COMPONENT, Boolean.TRUE)
+              .value(JSONOptions.EMIT_HOVER_SHOW_ENTITY_ID_AS_INT_ARRAY, Boolean.TRUE)
+              .value(JSONOptions.VALIDATE_STRICT_EVENTS, Boolean.TRUE)
+              // before 1.21.5
+              .value(JSONOptions.EMIT_CHANGE_PAGE_CLICK_EVENT_PAGE_AS_STRING, Boolean.TRUE)
               .build()
           )
           .build();
@@ -90,14 +116,18 @@ public enum ProtocolUtils {
       GsonComponentSerializer.builder()
           .legacyHoverEventSerializer(NBTLegacyHoverEventSerializer.get())
           .options(
-              OptionState.optionState()
+              OptionSchema.globalSchema().stateBuilder()
               // after 1.16
               .value(JSONOptions.EMIT_RGB, Boolean.TRUE)
-              .value(JSONOptions.EMIT_HOVER_EVENT_TYPE, JSONOptions.HoverEventValueMode.MODERN_ONLY)
+              .value(JSONOptions.EMIT_HOVER_EVENT_TYPE, JSONOptions.HoverEventValueMode.SNAKE_CASE)
+              .value(JSONOptions.EMIT_CLICK_EVENT_TYPE, JSONOptions.ClickEventValueMode.SNAKE_CASE)
               // after 1.20.3
               .value(JSONOptions.EMIT_COMPACT_TEXT_COMPONENT, Boolean.TRUE)
               .value(JSONOptions.EMIT_HOVER_SHOW_ENTITY_ID_AS_INT_ARRAY, Boolean.TRUE)
+              // after 1.21.5
+              .value(JSONOptions.EMIT_HOVER_SHOW_ENTITY_KEY_AS_TYPE_AND_UUID_AS_ID, Boolean.FALSE)
               .value(JSONOptions.VALIDATE_STRICT_EVENTS, Boolean.TRUE)
+              .value(JSONOptions.EMIT_CHANGE_PAGE_CLICK_EVENT_PAGE_AS_STRING, Boolean.FALSE)
               .build()
           )
           .build();
@@ -713,9 +743,12 @@ public enum ProtocolUtils {
    * @return the appropriate {@link GsonComponentSerializer}
    */
   public static GsonComponentSerializer getJsonChatSerializer(ProtocolVersion version) {
-    if (version.noLessThan(ProtocolVersion.MINECRAFT_1_20_3)) {
+    if (version.noLessThan(ProtocolVersion.MINECRAFT_1_21_5)) {
       return MODERN_SERIALIZER;
     }
+    if (version.noLessThan(ProtocolVersion.MINECRAFT_1_20_3)) {
+      return PRE_1_21_5_SERIALIZER;
+    }
     if (version.noLessThan(ProtocolVersion.MINECRAFT_1_16)) {
       return PRE_1_20_3_SERIALIZER;
     }

proxy/src/main/java/com/velocitypowered/proxy/protocol/StateRegistry.java

@@ -40,6 +40,7 @@ import static com.velocitypowered.api.network.ProtocolVersion.MINECRAFT_1_21;
 import static com.velocitypowered.api.network.ProtocolVersion.MINECRAFT_1_21_2;
 import static com.velocitypowered.api.network.ProtocolVersion.MINECRAFT_1_21_4;
 import static com.velocitypowered.api.network.ProtocolVersion.MINECRAFT_1_21_5;
+import static com.velocitypowered.api.network.ProtocolVersion.MINECRAFT_1_21_6;
 import static com.velocitypowered.api.network.ProtocolVersion.MINECRAFT_1_7_2;
 import static com.velocitypowered.api.network.ProtocolVersion.MINECRAFT_1_8;
 import static com.velocitypowered.api.network.ProtocolVersion.MINECRAFT_1_9;
@@ -87,6 +88,7 @@ import com.velocitypowered.proxy.protocol.packet.StatusResponsePacket;
 import com.velocitypowered.proxy.protocol.packet.TabCompleteRequestPacket;
 import com.velocitypowered.proxy.protocol.packet.TabCompleteResponsePacket;
 import com.velocitypowered.proxy.protocol.packet.TransferPacket;
+import com.velocitypowered.proxy.protocol.packet.UpdateTeamsPacket;
 import com.velocitypowered.proxy.protocol.packet.UpsertPlayerInfoPacket;
 import com.velocitypowered.proxy.protocol.packet.chat.ChatAcknowledgementPacket;
 import com.velocitypowered.proxy.protocol.packet.chat.PlayerChatCompletionPacket;
@@ -256,7 +258,8 @@ public enum StateRegistry {
           map(0x09, MINECRAFT_1_19_4, false),
           map(0x0A, MINECRAFT_1_20_2, false),
           map(0x0B, MINECRAFT_1_20_5, false),
-          map(0x0D, MINECRAFT_1_21_2, false));
+          map(0x0D, MINECRAFT_1_21_2, false),
+          map(0x0E, MINECRAFT_1_21_6, false));
       serverbound.register(
           LegacyChatPacket.class,
           LegacyChatPacket::new,
@@ -269,7 +272,8 @@ public enum StateRegistry {
           ChatAcknowledgementPacket.class,
           ChatAcknowledgementPacket::new,
           map(0x03, MINECRAFT_1_19_3, false),
-          map(0x04, MINECRAFT_1_21_2, false));
+          map(0x04, MINECRAFT_1_21_2, false),
+          map(0x05, MINECRAFT_1_21_6, false));
       serverbound.register(KeyedPlayerCommandPacket.class, KeyedPlayerCommandPacket::new,
           map(0x03, MINECRAFT_1_19, false),
           map(0x04, MINECRAFT_1_19_1, MINECRAFT_1_19_1, false));
@@ -279,16 +283,19 @@ public enum StateRegistry {
       serverbound.register(SessionPlayerCommandPacket.class, SessionPlayerCommandPacket::new,
           map(0x04, MINECRAFT_1_19_3, false),
           map(0x05, MINECRAFT_1_20_5, false),
-          map(0x06, MINECRAFT_1_21_2, false));
+          map(0x06, MINECRAFT_1_21_2, false),
+          map(0x07, MINECRAFT_1_21_6, false));
       serverbound.register(UnsignedPlayerCommandPacket.class, UnsignedPlayerCommandPacket::new,
           map(0x04, MINECRAFT_1_20_5, false),
-          map(0x05, MINECRAFT_1_21_2, false));
+          map(0x05, MINECRAFT_1_21_2, false),
+          map(0x06, MINECRAFT_1_21_6, false));
       serverbound.register(
           SessionPlayerChatPacket.class,
           SessionPlayerChatPacket::new,
           map(0x05, MINECRAFT_1_19_3, false),
           map(0x06, MINECRAFT_1_20_5, false),
-          map(0x07, MINECRAFT_1_21_2, false));
+          map(0x07, MINECRAFT_1_21_2, false),
+          map(0x08, MINECRAFT_1_21_6, false));
       serverbound.register(
           ClientSettingsPacket.class,
           ClientSettingsPacket::new,
@@ -303,11 +310,13 @@ public enum StateRegistry {
           map(0x08, MINECRAFT_1_19_4, false),
           map(0x09, MINECRAFT_1_20_2, false),
           map(0x0A, MINECRAFT_1_20_5, false),
-          map(0x0C, MINECRAFT_1_21_2, false));
+          map(0x0C, MINECRAFT_1_21_2, false),
+          map(0x0D, MINECRAFT_1_21_6, false));
       serverbound.register(
           ServerboundCookieResponsePacket.class, ServerboundCookieResponsePacket::new,
           map(0x11, MINECRAFT_1_20_5, false),
-          map(0x13, MINECRAFT_1_21_2, false));
+          map(0x13, MINECRAFT_1_21_2, false),
+          map(0x14, MINECRAFT_1_21_6, false));
       serverbound.register(
           PluginMessagePacket.class,
           PluginMessagePacket::new,
@@ -325,7 +334,8 @@ public enum StateRegistry {
           map(0x0F, MINECRAFT_1_20_2, false),
           map(0x10, MINECRAFT_1_20_3, false),
           map(0x12, MINECRAFT_1_20_5, false),
-          map(0x14, MINECRAFT_1_21_2, false));
+          map(0x14, MINECRAFT_1_21_2, false),
+          map(0x15, MINECRAFT_1_21_6, false));
       serverbound.register(
           KeepAlivePacket.class,
           KeepAlivePacket::new,
@@ -344,7 +354,8 @@ public enum StateRegistry {
           map(0x14, MINECRAFT_1_20_2, false),
           map(0x15, MINECRAFT_1_20_3, false),
           map(0x18, MINECRAFT_1_20_5, false),
-          map(0x1A, MINECRAFT_1_21_2, false));
+          map(0x1A, MINECRAFT_1_21_2, false),
+          map(0x1B, MINECRAFT_1_21_6, false));
       serverbound.register(
           ResourcePackResponsePacket.class,
           ResourcePackResponsePacket::new,
@@ -361,12 +372,14 @@ public enum StateRegistry {
           map(0x28, MINECRAFT_1_20_3, false),
           map(0x2B, MINECRAFT_1_20_5, false),
           map(0x2D, MINECRAFT_1_21_2, false),
-          map(0x2F, MINECRAFT_1_21_4, false));
+          map(0x2F, MINECRAFT_1_21_4, false),
+          map(0x30, MINECRAFT_1_21_6, false));
       serverbound.register(
           FinishedUpdatePacket.class, () -> FinishedUpdatePacket.INSTANCE,
           map(0x0B, MINECRAFT_1_20_2, false),
           map(0x0C, MINECRAFT_1_20_5, false),
-          map(0x0E, MINECRAFT_1_21_2, false));
+          map(0x0E, MINECRAFT_1_21_2, false),
+          map(0x0F, MINECRAFT_1_21_6, false));
 
       clientbound.register(
           BossBarPacket.class,
@@ -731,6 +744,22 @@ public enum StateRegistry {
           ClientboundServerLinksPacket::new,
           map(0x7B, MINECRAFT_1_21, false),
           map(0x82, MINECRAFT_1_21_2, false));
+      clientbound.register(UpdateTeamsPacket.class, UpdateTeamsPacket::new,
+              map(0x41, ProtocolVersion.MINECRAFT_1_9, true),
+              map(0x43, ProtocolVersion.MINECRAFT_1_12, true),
+              map(0x44, ProtocolVersion.MINECRAFT_1_12_1, true),
+              map(0x47, ProtocolVersion.MINECRAFT_1_13, true),
+              map(0x4B, ProtocolVersion.MINECRAFT_1_14, true),
+              map(0x4C, ProtocolVersion.MINECRAFT_1_15, true),
+              map(0x55, ProtocolVersion.MINECRAFT_1_17, true),
+              map(0x58, ProtocolVersion.MINECRAFT_1_19_1, true),
+              map(0x56, ProtocolVersion.MINECRAFT_1_19_3, true),
+              map(0x5A, ProtocolVersion.MINECRAFT_1_19_4, true),
+              map(0x5C, ProtocolVersion.MINECRAFT_1_20_2, true),
+              map(0x5E, ProtocolVersion.MINECRAFT_1_20_3, true),
+              map(0x60, ProtocolVersion.MINECRAFT_1_20_5, true),
+              map(0x67, ProtocolVersion.MINECRAFT_1_21_2, true)
+      );
     }
   },
   LOGIN {

proxy/src/main/java/com/velocitypowered/proxy/protocol/netty/MinecraftCompressDecoder.java

@@ -39,6 +39,7 @@ public class MinecraftCompressDecoder extends MessageToMessageDecoder<ByteBuf> {
   private static final int UNCOMPRESSED_CAP =
       Boolean.getBoolean("velocity.increased-compression-cap")
           ? HARD_MAXIMUM_UNCOMPRESSED_SIZE : VANILLA_MAXIMUM_UNCOMPRESSED_SIZE;
+  private static final boolean SKIP_COMPRESSION_VALIDATION = Boolean.getBoolean("velocity.skip-uncompressed-packet-size-validation");
 
   private int threshold;
   private final VelocityCompressor compressor;
@@ -52,9 +53,11 @@ public class MinecraftCompressDecoder extends MessageToMessageDecoder<ByteBuf> {
   protected void decode(ChannelHandlerContext ctx, ByteBuf in, List<Object> out) throws Exception {
     int claimedUncompressedSize = ProtocolUtils.readVarInt(in);
     if (claimedUncompressedSize == 0) {
-      int actualUncompressedSize = in.readableBytes();
+      if (!SKIP_COMPRESSION_VALIDATION) {
-      checkFrame(actualUncompressedSize < threshold, "Actual uncompressed size %s is greater than"
+        int actualUncompressedSize = in.readableBytes();
-              + " threshold %s", actualUncompressedSize, threshold);
+        checkFrame(actualUncompressedSize < threshold, "Actual uncompressed size %s is greater than"
+            + " threshold %s", actualUncompressedSize, threshold);
+      }
       // This message is not compressed.
       out.add(in.retain());
       return;

proxy/src/main/java/com/velocitypowered/proxy/protocol/netty/MinecraftDecoder.java

@@ -135,7 +135,7 @@ public class MinecraftDecoder extends ChannelInboundHandlerAdapter {
 
   private String getExtraConnectionDetail(int packetId) {
     return "Direction " + direction + " Protocol " + registry.version + " State " + state
-        + " ID " + Integer.toHexString(packetId);
+        + " ID 0x" + Integer.toHexString(packetId);
   }
 
   public void setProtocolVersion(ProtocolVersion protocolVersion) {

proxy/src/main/java/com/velocitypowered/proxy/protocol/netty/MinecraftVarintFrameDecoder.java

@@ -19,21 +19,51 @@ package com.velocitypowered.proxy.protocol.netty;
 
 import static io.netty.util.ByteProcessor.FIND_NON_NUL;
 
+import com.velocitypowered.api.network.ProtocolVersion;
+import com.velocitypowered.proxy.protocol.MinecraftPacket;
+import com.velocitypowered.proxy.protocol.ProtocolUtils;
+import com.velocitypowered.proxy.protocol.StateRegistry;
 import com.velocitypowered.proxy.util.except.QuietDecoderException;
+import com.velocitypowered.proxy.util.except.QuietRuntimeException;
 import io.netty.buffer.ByteBuf;
 import io.netty.channel.ChannelHandlerContext;
 import io.netty.handler.codec.ByteToMessageDecoder;
+import io.netty.handler.codec.CorruptedFrameException;
 import java.util.List;
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
 
 /**
  * Frames Minecraft server packets which are prefixed by a 21-bit VarInt encoding.
  */
 public class MinecraftVarintFrameDecoder extends ByteToMessageDecoder {
 
+  private static final Logger LOGGER = LogManager.getLogger(MinecraftVarintFrameDecoder.class);
+  private static final QuietRuntimeException FRAME_DECODER_FAILED =
+      new QuietRuntimeException("A packet frame decoder failed. For more information, launch "
+          + "Velocity with -Dvelocity.packet-decode-logging=true to see more.");
   private static final QuietDecoderException BAD_PACKET_LENGTH =
       new QuietDecoderException("Bad packet length");
   private static final QuietDecoderException VARINT_TOO_BIG =
       new QuietDecoderException("VarInt too big");
+  private static final QuietDecoderException UNKNOWN_PACKET =
+      new QuietDecoderException("Unknown packet");
+
+  private final ProtocolUtils.Direction direction;
+  private final StateRegistry.PacketRegistry.ProtocolRegistry registry;
+  private StateRegistry state;
+
+  /**
+   * Creates a new {@code MinecraftVarintFrameDecoder} decoding packets from the specified {@code Direction}.
+   *
+   * @param direction the direction from which we decode from
+   */
+  public MinecraftVarintFrameDecoder(ProtocolUtils.Direction direction) {
+    this.direction = direction;
+    this.registry = StateRegistry.HANDSHAKE.getProtocolRegistry(
+        direction, ProtocolVersion.MINIMUM_VERSION);
+    this.state = StateRegistry.HANDSHAKE;
+  }
 
   @Override
   protected void decode(ChannelHandlerContext ctx, ByteBuf in, List<Object> out)
@@ -62,6 +92,43 @@ public class MinecraftVarintFrameDecoder extends ByteToMessageDecoder {
       throw BAD_PACKET_LENGTH;
     }
 
+    if (length > 0) {
+      if (state == StateRegistry.HANDSHAKE && direction == ProtocolUtils.Direction.SERVERBOUND) {
+        StateRegistry.PacketRegistry.ProtocolRegistry registry =
+            state.getProtocolRegistry(direction, ProtocolVersion.MINIMUM_VERSION);
+
+        final int index = in.readerIndex();
+        final int packetId = readRawVarInt21(in);
+        // Index hasn't changed, we've read nothing
+        if (index == in.readerIndex()) {
+          in.resetReaderIndex();
+          return;
+        }
+        final int payloadLength = length - ProtocolUtils.varIntBytes(packetId);
+
+        MinecraftPacket packet = registry.createPacket(packetId);
+
+        // We handle every packet in this phase, if you said something we don't know, something is really wrong
+        if (packet == null) {
+          throw UNKNOWN_PACKET;
+        }
+
+        // We 'technically' have the incoming bytes of a payload here, and so, these can actually parse
+        // the packet if needed, so, we'll take advantage of the existing methods
+        int expectedMinLen = packet.expectedMinLength(in, direction, registry.version);
+        int expectedMaxLen = packet.expectedMaxLength(in, direction, registry.version);
+        if (expectedMaxLen != -1 && payloadLength > expectedMaxLen) {
+          throw handleOverflow(packet, expectedMaxLen, in.readableBytes());
+        }
+        if (payloadLength < expectedMinLen) {
+          throw handleUnderflow(packet, expectedMaxLen, in.readableBytes());
+        }
+
+
+        in.readerIndex(index);
+      }
+    }
+
     // note that zero-length packets are ignored
     if (length > 0) {
       if (in.readableBytes() < length) {
@@ -72,6 +139,16 @@ public class MinecraftVarintFrameDecoder extends ByteToMessageDecoder {
     }
   }
 
+  @Override
+  public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception {
+    if (MinecraftDecoder.DEBUG) {
+      LOGGER.atWarn()
+          .withThrowable(cause)
+          .log("Exception caught while decoding frame for {}", ctx.channel().remoteAddress());
+    }
+    super.exceptionCaught(ctx, cause);
+  }
+
   /**
    * Reads a VarInt from the buffer of up to 21 bits in size.
    *
@@ -141,4 +218,26 @@ public class MinecraftVarintFrameDecoder extends ByteToMessageDecoder {
     }
     return result | (tmp & 0x7F) << 14;
   }
+
+  private Exception handleOverflow(MinecraftPacket packet, int expected, int actual) {
+    if (MinecraftDecoder.DEBUG) {
+      return new CorruptedFrameException("Packet sent for " + packet.getClass() + " was too "
+          + "big (expected " + expected + " bytes, got " + actual + " bytes)");
+    } else {
+      return FRAME_DECODER_FAILED;
+    }
+  }
+
+  private Exception handleUnderflow(MinecraftPacket packet, int expected, int actual) {
+    if (MinecraftDecoder.DEBUG) {
+      return new CorruptedFrameException("Packet sent for " + packet.getClass() + " was too "
+          + "small (expected " + expected + " bytes, got " + actual + " bytes)");
+    } else {
+      return FRAME_DECODER_FAILED;
+    }
+  }
+
+  public void setState(StateRegistry stateRegistry) {
+    this.state = stateRegistry;
+  }
 }

proxy/src/main/java/com/velocitypowered/proxy/protocol/packet/AvailableCommandsPacket.java

@@ -50,12 +50,14 @@ import java.util.Deque;
 import java.util.Iterator;
 import java.util.Queue;
 import java.util.concurrent.CompletableFuture;
+import java.util.function.Predicate;
 import org.checkerframework.checker.nullness.qual.MonotonicNonNull;
 import org.checkerframework.checker.nullness.qual.Nullable;
 
 public class AvailableCommandsPacket implements MinecraftPacket {
 
   private static final Command<CommandSource> PLACEHOLDER_COMMAND = source -> 0;
+  private static final Predicate<CommandSource> PLACEHOLDER_REQUIREMENT = source -> true;
 
   private static final byte NODE_TYPE_ROOT = 0x00;
   private static final byte NODE_TYPE_LITERAL = 0x01;
@@ -65,6 +67,7 @@ public class AvailableCommandsPacket implements MinecraftPacket {
   private static final byte FLAG_EXECUTABLE = 0x04;
   private static final byte FLAG_IS_REDIRECT = 0x08;
   private static final byte FLAG_HAS_SUGGESTIONS = 0x10;
+  private static final byte FLAG_IS_RESTRICTED = 0x20;
 
   private @MonotonicNonNull RootCommandNode<CommandSource> rootNode;
 
@@ -146,6 +149,9 @@ public class AvailableCommandsPacket implements MinecraftPacket {
     if (node.getCommand() != null) {
       flags |= FLAG_EXECUTABLE;
     }
+    if (node.getRequirement() == PLACEHOLDER_REQUIREMENT) {
+      flags |= FLAG_IS_RESTRICTED;
+    }
 
     if (node instanceof LiteralCommandNode<?>) {
       flags |= NODE_TYPE_LITERAL;
@@ -289,6 +295,11 @@ public class AvailableCommandsPacket implements MinecraftPacket {
             args.executes(PLACEHOLDER_COMMAND);
           }
 
+          // If restricted, add empty requirement
+          if ((flags & FLAG_IS_RESTRICTED) != 0) {
+            args.requires(PLACEHOLDER_REQUIREMENT);
+          }
+
           this.built = args.build();
         }
       }

proxy/src/main/java/com/velocitypowered/proxy/protocol/packet/HandshakePacket.java

@@ -106,4 +106,16 @@ public class HandshakePacket implements MinecraftPacket {
   public boolean handle(MinecraftSessionHandler handler) {
     return handler.handle(this);
   }
+
+  @Override
+  public int expectedMinLength(ByteBuf buf, ProtocolUtils.Direction direction,
+                               ProtocolVersion version) {
+    return 7;
+  }
+
+  @Override
+  public int expectedMaxLength(ByteBuf buf, ProtocolUtils.Direction direction,
+                               ProtocolVersion version) {
+    return 9 + (MAXIMUM_HOSTNAME_LENGTH * 3);
+  }
 }

proxy/src/main/java/com/velocitypowered/proxy/protocol/packet/UpdateTeamsPacket.java

@@ -0,0 +1,233 @@
+/*
+ *   This file is a part of the SteamWar software.
+ *
+ *   Copyright (C) 2024  SteamWar.de-Serverteam
+ *
+ *   This program is free software: you can redistribute it and/or modify
+ *   it under the terms of the GNU Affero General Public License as published by
+ *   the Free Software Foundation, either version 3 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ *   GNU Affero General Public License for more details.
+ *
+ *   You should have received a copy of the GNU Affero General Public License
+ *   along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package com.velocitypowered.proxy.protocol.packet;
+
+import com.velocitypowered.api.network.ProtocolVersion;
+import com.velocitypowered.api.proxy.Player;
+import com.velocitypowered.proxy.connection.MinecraftSessionHandler;
+import com.velocitypowered.proxy.protocol.MinecraftPacket;
+import com.velocitypowered.proxy.protocol.ProtocolUtils;
+import com.velocitypowered.proxy.protocol.packet.chat.ComponentHolder;
+import io.netty.buffer.ByteBuf;
+import net.kyori.adventure.text.Component;
+
+import java.util.List;
+
+public class UpdateTeamsPacket implements MinecraftPacket {
+    private String name;
+    private Mode mode;
+
+    private Component displayName;
+    private Component prefix;
+    private Component suffix;
+    private NameTagVisibility nameTagVisibility;
+    private CollisionRule collisionRule;
+    private int color;
+    private byte friendlyFlags;
+
+    private List<String> players;
+
+    public UpdateTeamsPacket(String name, Mode mode, Component displayName, Component prefix, Component suffix, NameTagVisibility nameTagVisibility, CollisionRule collisionRule, int color, byte friendlyFlags, List<String> players) {
+        this.name = name;
+        this.mode = mode;
+        this.displayName = displayName;
+        this.prefix = prefix;
+        this.suffix = suffix;
+        this.nameTagVisibility = nameTagVisibility;
+        this.collisionRule = collisionRule;
+        this.color = color;
+        this.friendlyFlags = friendlyFlags;
+        this.players = players;
+    }
+
+    public UpdateTeamsPacket() {
+    }
+
+    @Override
+    public void decode(ByteBuf byteBuf, ProtocolUtils.Direction direction, ProtocolVersion protocolVersion) {
+        throw new UnsupportedOperationException("Packet is not implemented");
+    }
+
+    @Override
+    public boolean handle(MinecraftSessionHandler minecraftSessionHandler) {
+        return false;
+    }
+
+    @Override
+    public void encode(ByteBuf byteBuf, ProtocolUtils.Direction direction, ProtocolVersion protocolVersion) {
+        ProtocolUtils.writeString(byteBuf, name);
+        byteBuf.writeByte(mode.ordinal());
+
+        switch (mode) {
+            case CREATE, UPDATE:
+                new ComponentHolder(protocolVersion, displayName).write(byteBuf);
+                if (protocolVersion.lessThan(ProtocolVersion.MINECRAFT_1_13)) {
+                    new ComponentHolder(protocolVersion, prefix).write(byteBuf);
+                    new ComponentHolder(protocolVersion, suffix).write(byteBuf);
+                }
+                byteBuf.writeByte(friendlyFlags);
+                ProtocolUtils.writeString(byteBuf, nameTagVisibility.getValue());
+                ProtocolUtils.writeString(byteBuf, collisionRule.getValue());
+                if (protocolVersion.greaterThan(ProtocolVersion.MINECRAFT_1_12_2)) {
+                    ProtocolUtils.writeVarInt(byteBuf, color);
+                    new ComponentHolder(protocolVersion, prefix).write(byteBuf);
+                    new ComponentHolder(protocolVersion, suffix).write(byteBuf);
+                } else {
+                    byteBuf.writeByte((byte) color);
+                }
+
+                ProtocolUtils.writeVarInt(byteBuf, players.size());
+                for (String player : players) {
+                    ProtocolUtils.writeString(byteBuf, player);
+                }
+                break;
+            case ADD_PLAYER, REMOVE_PLAYER:
+                ProtocolUtils.writeVarInt(byteBuf, players.size());
+                for (String player : players) {
+                    ProtocolUtils.writeString(byteBuf, player);
+                }
+                break;
+            case REMOVE:
+                break;
+        }
+    }
+
+    public enum Mode {
+        CREATE,
+        REMOVE,
+        UPDATE,
+        ADD_PLAYER,
+        REMOVE_PLAYER,
+    }
+
+    public enum NameTagVisibility {
+        ALWAYS("always"),
+        NEVER("never"),
+        HIDE_FOR_OTHER_TEAMS("hideForOtherTeams"),
+        HIDE_FOR_OWN_TEAM("hideForOwnTeam");
+
+        private final String value;
+
+        NameTagVisibility(String value) {
+            this.value = value;
+        }
+
+        public String getValue() {
+            return value;
+        }
+    }
+
+    public enum CollisionRule {
+        ALWAYS("always"),
+        NEVER("never"),
+        PUSH_OTHER_TEAMS("pushOtherTeams"),
+        PUSH_OWN_TEAM("pushOwnTeam");
+
+        private final String value;
+
+        CollisionRule(String value) {
+            this.value = value;
+        }
+
+        public String getValue() {
+            return value;
+        }
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public Mode getMode() {
+        return mode;
+    }
+
+    public Component getDisplayName() {
+        return displayName;
+    }
+
+    public Component getPrefix() {
+        return prefix;
+    }
+
+    public Component getSuffix() {
+        return suffix;
+    }
+
+    public NameTagVisibility getNameTagVisibility() {
+        return nameTagVisibility;
+    }
+
+    public CollisionRule getCollisionRule() {
+        return collisionRule;
+    }
+
+    public int getColor() {
+        return color;
+    }
+
+    public byte getFriendlyFlags() {
+        return friendlyFlags;
+    }
+
+    public List<String> getPlayers() {
+        return players;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public void setMode(Mode mode) {
+        this.mode = mode;
+    }
+
+    public void setDisplayName(Component displayName) {
+        this.displayName = displayName;
+    }
+
+    public void setPrefix(Component prefix) {
+        this.prefix = prefix;
+    }
+
+    public void setSuffix(Component suffix) {
+        this.suffix = suffix;
+    }
+
+    public void setNameTagVisibility(NameTagVisibility nameTagVisibility) {
+        this.nameTagVisibility = nameTagVisibility;
+    }
+
+    public void setCollisionRule(CollisionRule collisionRule) {
+        this.collisionRule = collisionRule;
+    }
+
+    public void setColor(int color) {
+        this.color = color;
+    }
+
+    public void setFriendlyFlags(byte friendlyFlags) {
+        this.friendlyFlags = friendlyFlags;
+    }
+
+    public void setPlayers(List<String> players) {
+        this.players = players;
+    }
+}

proxy/src/main/java/com/velocitypowered/proxy/protocol/packet/brigadier/ArgumentPropertyRegistry.java

@@ -23,6 +23,7 @@ import static com.velocitypowered.api.network.ProtocolVersion.MINECRAFT_1_19_4;
 import static com.velocitypowered.api.network.ProtocolVersion.MINECRAFT_1_20_3;
 import static com.velocitypowered.api.network.ProtocolVersion.MINECRAFT_1_20_5;
 import static com.velocitypowered.api.network.ProtocolVersion.MINECRAFT_1_21_5;
+import static com.velocitypowered.api.network.ProtocolVersion.MINECRAFT_1_21_6;
 import static com.velocitypowered.proxy.protocol.packet.brigadier.ArgumentIdentifier.id;
 import static com.velocitypowered.proxy.protocol.packet.brigadier.ArgumentIdentifier.mapSet;
 import static com.velocitypowered.proxy.protocol.packet.brigadier.DoubleArgumentPropertySerializer.DOUBLE;
@@ -164,6 +165,7 @@ public class ArgumentPropertyRegistry {
           return i;
         }
       }
+      throw new IllegalArgumentException("Argument type identifier " + id + " unknown.");
     } else {
       String identifier = ProtocolUtils.readString(buf);
       for (ArgumentIdentifier i : byIdentifier.keySet()) {
@@ -207,68 +209,79 @@ public class ArgumentPropertyRegistry {
     empty(id("minecraft:item_stack", mapSet(MINECRAFT_1_19, 14)));
     empty(id("minecraft:item_predicate", mapSet(MINECRAFT_1_19, 15)));
     empty(id("minecraft:color", mapSet(MINECRAFT_1_19, 16)));
-    empty(id("minecraft:component", mapSet(MINECRAFT_1_19, 17)));
+    empty(id("minecraft:component", mapSet(MINECRAFT_1_21_6, 18), mapSet(MINECRAFT_1_19, 17)));
-    empty(id("minecraft:style", mapSet(MINECRAFT_1_20_3, 18))); // added 1.20.3
+    empty(id("minecraft:style", mapSet(MINECRAFT_1_21_6, 19), mapSet(MINECRAFT_1_20_3, 18))); // added 1.20.3
-    empty(id("minecraft:message", mapSet(MINECRAFT_1_20_3, 19), mapSet(MINECRAFT_1_19, 18)));
+    empty(id("minecraft:message", mapSet(MINECRAFT_1_21_6, 20), mapSet(MINECRAFT_1_20_3, 19), mapSet(MINECRAFT_1_19, 18)));
-    empty(id("minecraft:nbt_compound_tag", mapSet(MINECRAFT_1_20_3, 20), mapSet(MINECRAFT_1_19, 19))); // added in 1.14
+    empty(id("minecraft:nbt_compound_tag", mapSet(MINECRAFT_1_21_6, 21), mapSet(MINECRAFT_1_20_3, 20), mapSet(MINECRAFT_1_19, 19))); // added in 1.14
-    empty(id("minecraft:nbt_tag", mapSet(MINECRAFT_1_20_3, 21), mapSet(MINECRAFT_1_19, 20))); // added in 1.14
+    empty(id("minecraft:nbt_tag", mapSet(MINECRAFT_1_21_6, 22), mapSet(MINECRAFT_1_20_3, 21), mapSet(MINECRAFT_1_19, 20))); // added in 1.14
-    empty(id("minecraft:nbt_path", mapSet(MINECRAFT_1_20_3, 22), mapSet(MINECRAFT_1_19, 21)));
+    empty(id("minecraft:nbt_path", mapSet(MINECRAFT_1_21_6, 23), mapSet(MINECRAFT_1_20_3, 22), mapSet(MINECRAFT_1_19, 21)));
-    empty(id("minecraft:objective", mapSet(MINECRAFT_1_20_3, 23), mapSet(MINECRAFT_1_19, 22)));
+    empty(id("minecraft:objective", mapSet(MINECRAFT_1_21_6, 24), mapSet(MINECRAFT_1_20_3, 23), mapSet(MINECRAFT_1_19, 22)));
-    empty(id("minecraft:objective_criteria", mapSet(MINECRAFT_1_20_3, 24), mapSet(MINECRAFT_1_19, 23)));
+    empty(id("minecraft:objective_criteria", mapSet(MINECRAFT_1_21_6, 25), mapSet(MINECRAFT_1_20_3, 24), mapSet(MINECRAFT_1_19, 23)));
-    empty(id("minecraft:operation", mapSet(MINECRAFT_1_20_3, 25), mapSet(MINECRAFT_1_19, 24)));
+    empty(id("minecraft:operation", mapSet(MINECRAFT_1_21_6, 26), mapSet(MINECRAFT_1_20_3, 25), mapSet(MINECRAFT_1_19, 24)));
-    empty(id("minecraft:particle", mapSet(MINECRAFT_1_20_3, 26), mapSet(MINECRAFT_1_19, 25)));
+    empty(id("minecraft:particle", mapSet(MINECRAFT_1_21_6, 27), mapSet(MINECRAFT_1_20_3, 26), mapSet(MINECRAFT_1_19, 25)));
-    empty(id("minecraft:angle", mapSet(MINECRAFT_1_20_3, 27), mapSet(MINECRAFT_1_19, 26))); // added in 1.16.2
+    empty(id("minecraft:angle", mapSet(MINECRAFT_1_21_6, 28), mapSet(MINECRAFT_1_20_3, 27), mapSet(MINECRAFT_1_19, 26))); // added in 1.16.2
-    empty(id("minecraft:rotation", mapSet(MINECRAFT_1_20_3, 28), mapSet(MINECRAFT_1_19, 27)));
+    empty(id("minecraft:rotation", mapSet(MINECRAFT_1_21_6, 29), mapSet(MINECRAFT_1_20_3, 28), mapSet(MINECRAFT_1_19, 27)));
-    empty(id("minecraft:scoreboard_slot", mapSet(MINECRAFT_1_20_3, 29), mapSet(MINECRAFT_1_19, 28)));
+    empty(id("minecraft:scoreboard_slot", mapSet(MINECRAFT_1_21_6, 30), mapSet(MINECRAFT_1_20_3, 29), mapSet(MINECRAFT_1_19, 28)));
-    empty(id("minecraft:score_holder", mapSet(MINECRAFT_1_20_3, 30), mapSet(MINECRAFT_1_19, 29)), ByteArgumentPropertySerializer.BYTE);
+    empty(id("minecraft:score_holder", mapSet(MINECRAFT_1_21_6, 31), mapSet(MINECRAFT_1_20_3, 30), mapSet(MINECRAFT_1_19, 29)),
-    empty(id("minecraft:swizzle", mapSet(MINECRAFT_1_20_3, 31), mapSet(MINECRAFT_1_19, 30)));
+        ByteArgumentPropertySerializer.BYTE);
-    empty(id("minecraft:team", mapSet(MINECRAFT_1_20_3, 32), mapSet(MINECRAFT_1_19, 31)));
+    empty(id("minecraft:swizzle", mapSet(MINECRAFT_1_21_6, 32), mapSet(MINECRAFT_1_20_3, 31), mapSet(MINECRAFT_1_19, 30)));
-    empty(id("minecraft:item_slot", mapSet(MINECRAFT_1_20_3, 33), mapSet(MINECRAFT_1_19, 32)));
+    empty(id("minecraft:team", mapSet(MINECRAFT_1_21_6, 33), mapSet(MINECRAFT_1_20_3, 32), mapSet(MINECRAFT_1_19, 31)));
-    empty(id("minecraft:item_slots", mapSet(MINECRAFT_1_20_5, 34))); // added 1.20.5
+    empty(id("minecraft:item_slot", mapSet(MINECRAFT_1_21_6, 34), mapSet(MINECRAFT_1_20_3, 33), mapSet(MINECRAFT_1_19, 32)));
-    empty(id("minecraft:resource_location", mapSet(MINECRAFT_1_20_5, 35), mapSet(MINECRAFT_1_20_3, 34), mapSet(MINECRAFT_1_19, 33)));
+    empty(id("minecraft:item_slots", mapSet(MINECRAFT_1_21_6, 35), mapSet(MINECRAFT_1_20_5, 34))); // added 1.20.5
+    empty(id("minecraft:resource_location", mapSet(MINECRAFT_1_21_6, 36), mapSet(MINECRAFT_1_20_5, 35), mapSet(MINECRAFT_1_20_3, 34),
+        mapSet(MINECRAFT_1_19, 33)));
     empty(id("minecraft:mob_effect", mapSet(MINECRAFT_1_19_3, -1), mapSet(MINECRAFT_1_19, 34)));
-    empty(id("minecraft:function", mapSet(MINECRAFT_1_20_5, 36), mapSet(MINECRAFT_1_20_3, 35), mapSet(MINECRAFT_1_19_3, 34),
+    empty(id("minecraft:function", mapSet(MINECRAFT_1_21_6, 37), mapSet(MINECRAFT_1_20_5, 36), mapSet(MINECRAFT_1_20_3, 35),
-        mapSet(MINECRAFT_1_19, 35)));
+        mapSet(MINECRAFT_1_19_3, 34), mapSet(MINECRAFT_1_19, 35)));
-    empty(id("minecraft:entity_anchor", mapSet(MINECRAFT_1_20_5, 37), mapSet(MINECRAFT_1_20_3, 36), mapSet(MINECRAFT_1_19_3, 35),
+    empty(id("minecraft:entity_anchor", mapSet(MINECRAFT_1_21_6, 38), mapSet(MINECRAFT_1_20_5, 37), mapSet(MINECRAFT_1_20_3, 36),
-        mapSet(MINECRAFT_1_19, 36)));
+        mapSet(MINECRAFT_1_19_3, 35), mapSet(MINECRAFT_1_19, 36)));
-    empty(id("minecraft:int_range", mapSet(MINECRAFT_1_20_5, 38), mapSet(MINECRAFT_1_20_3, 37), mapSet(MINECRAFT_1_19_3, 36),
+    empty(id("minecraft:int_range", mapSet(MINECRAFT_1_21_6, 39), mapSet(MINECRAFT_1_20_5, 38), mapSet(MINECRAFT_1_20_3, 37),
-        mapSet(MINECRAFT_1_19, 37)));
+        mapSet(MINECRAFT_1_19_3, 36), mapSet(MINECRAFT_1_19, 37)));
-    empty(id("minecraft:float_range", mapSet(MINECRAFT_1_20_5, 39), mapSet(MINECRAFT_1_20_3, 38), mapSet(MINECRAFT_1_19_3, 37),
+    empty(id("minecraft:float_range", mapSet(MINECRAFT_1_21_6, 40), mapSet(MINECRAFT_1_20_5, 39), mapSet(MINECRAFT_1_20_3, 38),
-        mapSet(MINECRAFT_1_19, 38)));
+        mapSet(MINECRAFT_1_19_3, 37), mapSet(MINECRAFT_1_19, 38)));
     empty(id("minecraft:item_enchantment", mapSet(MINECRAFT_1_19_3, -1), mapSet(MINECRAFT_1_19, 39)));
     empty(id("minecraft:entity_summon", mapSet(MINECRAFT_1_19_3, -1), mapSet(MINECRAFT_1_19, 40)));
-    empty(id("minecraft:dimension", mapSet(MINECRAFT_1_20_5, 40), mapSet(MINECRAFT_1_20_3, 39), mapSet(MINECRAFT_1_19_3, 38),
+    empty(id("minecraft:dimension", mapSet(MINECRAFT_1_21_6, 41), mapSet(MINECRAFT_1_20_5, 40), mapSet(MINECRAFT_1_20_3, 39),
-        mapSet(MINECRAFT_1_19, 41)));
+        mapSet(MINECRAFT_1_19_3, 38), mapSet(MINECRAFT_1_19, 41)));
-    empty(id("minecraft:gamemode", mapSet(MINECRAFT_1_20_5, 41), mapSet(MINECRAFT_1_20_3, 40), mapSet(MINECRAFT_1_19_3, 39))); // 1.19.3
+    empty(id("minecraft:gamemode", mapSet(MINECRAFT_1_21_6, 42), mapSet(MINECRAFT_1_20_5, 41), mapSet(MINECRAFT_1_20_3, 40),
+        mapSet(MINECRAFT_1_19_3, 39))); // 1.19.3
 
-    empty(id("minecraft:time", mapSet(MINECRAFT_1_20_5, 42), mapSet(MINECRAFT_1_20_3, 41), mapSet(MINECRAFT_1_19_3, 40),
+    empty(id("minecraft:time", mapSet(MINECRAFT_1_21_6, 43), mapSet(MINECRAFT_1_20_5, 42), mapSet(MINECRAFT_1_20_3, 41),
-        mapSet(MINECRAFT_1_19, 42)), TimeArgumentSerializer.TIME); // added in 1.14
+        mapSet(MINECRAFT_1_19_3, 40), mapSet(MINECRAFT_1_19, 42)), TimeArgumentSerializer.TIME); // added in 1.14
 
-    register(id("minecraft:resource_or_tag", mapSet(MINECRAFT_1_20_5, 43), mapSet(MINECRAFT_1_20_3, 42), mapSet(MINECRAFT_1_19_3, 41),
+    register(id("minecraft:resource_or_tag", mapSet(MINECRAFT_1_21_6, 44), mapSet(MINECRAFT_1_20_5, 43), mapSet(MINECRAFT_1_20_3, 42),
-        mapSet(MINECRAFT_1_19, 43)), RegistryKeyArgument.class, RegistryKeyArgumentSerializer.REGISTRY);
+        mapSet(MINECRAFT_1_19_3, 41), mapSet(MINECRAFT_1_19, 43)), RegistryKeyArgument.class, RegistryKeyArgumentSerializer.REGISTRY);
-    register(id("minecraft:resource_or_tag_key", mapSet(MINECRAFT_1_20_5, 44), mapSet(MINECRAFT_1_20_3, 43), mapSet(MINECRAFT_1_19_3, 42)),
+    register(id("minecraft:resource_or_tag_key", mapSet(MINECRAFT_1_21_6, 45), mapSet(MINECRAFT_1_20_5, 44), mapSet(MINECRAFT_1_20_3, 43),
+        mapSet(MINECRAFT_1_19_3, 42)),
         RegistryKeyArgumentList.ResourceOrTagKey.class,
         RegistryKeyArgumentList.ResourceOrTagKey.Serializer.REGISTRY);
-    register(id("minecraft:resource", mapSet(MINECRAFT_1_20_5, 45), mapSet(MINECRAFT_1_20_3, 44), mapSet(MINECRAFT_1_19_3, 43),
+    register(id("minecraft:resource", mapSet(MINECRAFT_1_21_6, 46), mapSet(MINECRAFT_1_20_5, 45), mapSet(MINECRAFT_1_20_3, 44),
-        mapSet(MINECRAFT_1_19, 44)),
+        mapSet(MINECRAFT_1_19_3, 43), mapSet(MINECRAFT_1_19, 44)),
         RegistryKeyArgument.class, RegistryKeyArgumentSerializer.REGISTRY);
-    register(id("minecraft:resource_key", mapSet(MINECRAFT_1_20_5, 46), mapSet(MINECRAFT_1_20_3, 45), mapSet(MINECRAFT_1_19_3, 44)),
+    register(id("minecraft:resource_key", mapSet(MINECRAFT_1_21_6, 47), mapSet(MINECRAFT_1_20_5, 46), mapSet(MINECRAFT_1_20_3, 45),
+        mapSet(MINECRAFT_1_19_3, 44)),
         RegistryKeyArgumentList.ResourceKey.class,
         RegistryKeyArgumentList.ResourceKey.Serializer.REGISTRY);
-    register(id("minecraft:resource_selector", mapSet(MINECRAFT_1_21_5, 47)),
+    register(id("minecraft:resource_selector", mapSet(MINECRAFT_1_21_6, 48), mapSet(MINECRAFT_1_21_5, 47)),
         RegistryKeyArgumentList.ResourceSelector.class,
         RegistryKeyArgumentList.ResourceSelector.Serializer.REGISTRY);
 
-    empty(id("minecraft:template_mirror", mapSet(MINECRAFT_1_21_5, 48), mapSet(MINECRAFT_1_20_5, 47), mapSet(MINECRAFT_1_20_3, 46), mapSet(MINECRAFT_1_19, 45))); // 1.19
+    empty(id("minecraft:template_mirror", mapSet(MINECRAFT_1_21_6, 49), mapSet(MINECRAFT_1_21_5, 48), mapSet(MINECRAFT_1_20_5, 47),
-    empty(id("minecraft:template_rotation", mapSet(MINECRAFT_1_21_5, 49), mapSet(MINECRAFT_1_20_5, 48), mapSet(MINECRAFT_1_20_3, 47), mapSet(MINECRAFT_1_19, 46))); // 1.19
+        mapSet(MINECRAFT_1_20_3, 46), mapSet(MINECRAFT_1_19, 45))); // 1.19
-    empty(id("minecraft:heightmap", mapSet(MINECRAFT_1_21_5, 50), mapSet(MINECRAFT_1_20_3, 49), mapSet(MINECRAFT_1_19_4, 47))); // 1.19.4
+    empty(id("minecraft:template_rotation", mapSet(MINECRAFT_1_21_6, 50), mapSet(MINECRAFT_1_21_5, 49), mapSet(MINECRAFT_1_20_5, 48),
+        mapSet(MINECRAFT_1_20_3, 47), mapSet(MINECRAFT_1_19, 46))); // 1.19
+    empty(id("minecraft:heightmap", mapSet(MINECRAFT_1_21_6, 51), mapSet(MINECRAFT_1_21_5, 50), mapSet(MINECRAFT_1_20_3, 49),
+        mapSet(MINECRAFT_1_19_4, 47))); // 1.19.4
 
-    empty(id("minecraft:uuid", mapSet(MINECRAFT_1_21_5, 54),mapSet(MINECRAFT_1_20_5, 53), mapSet(MINECRAFT_1_20_3, 48), mapSet(MINECRAFT_1_19_4, 48),
+    empty(id("minecraft:uuid", mapSet(MINECRAFT_1_21_6, 56), mapSet(MINECRAFT_1_21_5, 54),mapSet(MINECRAFT_1_20_5, 53), mapSet(MINECRAFT_1_20_3, 48),
-        mapSet(MINECRAFT_1_19, 47))); // added in 1.16
+        mapSet(MINECRAFT_1_19_4, 48), mapSet(MINECRAFT_1_19, 47))); // added in 1.16
 
-    empty(id("minecraft:loot_table", mapSet(MINECRAFT_1_21_5, 51), mapSet(MINECRAFT_1_20_5, 50)));
+    empty(id("minecraft:loot_table", mapSet(MINECRAFT_1_21_6, 52), mapSet(MINECRAFT_1_21_5, 51), mapSet(MINECRAFT_1_20_5, 50)));
-    empty(id("minecraft:loot_predicate", mapSet(MINECRAFT_1_21_5, 52), mapSet(MINECRAFT_1_20_5, 51)));
+    empty(id("minecraft:loot_predicate", mapSet(MINECRAFT_1_21_6, 53), mapSet(MINECRAFT_1_21_5, 52), mapSet(MINECRAFT_1_20_5, 51)));
-    empty(id("minecraft:loot_modifier", mapSet(MINECRAFT_1_21_5, 53), mapSet(MINECRAFT_1_20_5, 52)));
+    empty(id("minecraft:loot_modifier", mapSet(MINECRAFT_1_21_6, 54), mapSet(MINECRAFT_1_21_5, 53), mapSet(MINECRAFT_1_20_5, 52)));
+
+    empty(id("minecraft:hex_color", mapSet(MINECRAFT_1_21_6, 17))); // added in 1.21.6
+    empty(id("minecraft:dialog", mapSet(MINECRAFT_1_21_6, 55))); // added in 1.21.6
 
     // Crossstitch support
     register(id("crossstitch:mod_argument", mapSet(MINECRAFT_1_19, -256)), ModArgumentProperty.class, MOD);

proxy/src/main/java/com/velocitypowered/proxy/protocol/packet/chat/keyed/KeyedPlayerChatPacket.java

@@ -116,6 +116,8 @@ public class KeyedPlayerChatPacket implements MinecraftPacket {
             ProtocolUtils.readByteArray(buf));
       }
     }
+
+    unsigned = true;
   }
 
   @Override

proxy/src/main/java/com/velocitypowered/proxy/protocol/packet/chat/keyed/KeyedPlayerCommandPacket.java

@@ -132,6 +132,7 @@ public class KeyedPlayerCommandPacket implements MinecraftPacket {
       unsigned = true;
     }
 
+    unsigned = true;
   }
 
   @Override

proxy/src/main/java/com/velocitypowered/proxy/protocol/packet/chat/session/SessionPlayerChatPacket.java

@@ -69,6 +69,7 @@ public class SessionPlayerChatPacket implements MinecraftPacket {
     this.salt = buf.readLong();
     this.signed = buf.readBoolean();
     if (this.signed) {
+      this.signed = false;
       this.signature = readMessageSignature(buf);
     } else {
       this.signature = new byte[0];

proxy/src/main/java/com/velocitypowered/proxy/protocol/packet/chat/session/SessionPlayerCommandPacket.java

@@ -46,6 +46,8 @@ public class SessionPlayerCommandPacket implements MinecraftPacket {
     this.salt = buf.readLong();
     this.argumentSignatures = new ArgumentSignatures(buf);
     this.lastSeenMessages = new LastSeenMessages(buf, protocolVersion);
+
+    this.argumentSignatures = new ArgumentSignatures();
   }
 
   @Override

proxy/src/main/java/com/velocitypowered/proxy/protocol/packet/config/KnownPacksPacket.java

@@ -36,7 +36,7 @@ public class KnownPacksPacket implements MinecraftPacket {
     public void decode(ByteBuf buf, ProtocolUtils.Direction direction,
                        ProtocolVersion protocolVersion) {
         final int packCount = ProtocolUtils.readVarInt(buf);
-        if (packCount > MAX_LENGTH_PACKS) {
+        if (direction == ProtocolUtils.Direction.SERVERBOUND && packCount > MAX_LENGTH_PACKS) {
           throw TOO_MANY_PACKS;
         }
 

proxy/src/main/java/com/velocitypowered/proxy/protocol/util/PluginMessageUtil.java

@@ -26,6 +26,7 @@ import com.velocitypowered.api.proxy.messages.ChannelIdentifier;
 import com.velocitypowered.api.proxy.messages.LegacyChannelIdentifier;
 import com.velocitypowered.api.proxy.messages.MinecraftChannelIdentifier;
 import com.velocitypowered.api.util.ProxyVersion;
+import com.velocitypowered.proxy.connection.client.ConnectedPlayer;
 import com.velocitypowered.proxy.protocol.ProtocolUtils;
 import com.velocitypowered.proxy.protocol.netty.MinecraftDecoder;
 import com.velocitypowered.proxy.protocol.packet.PluginMessagePacket;
@@ -33,7 +34,6 @@ import com.velocitypowered.proxy.util.except.QuietDecoderException;
 import io.netty.buffer.ByteBuf;
 import io.netty.buffer.Unpooled;
 import java.nio.charset.StandardCharsets;
-import java.util.ArrayList;
 import java.util.Collection;
 import java.util.Iterator;
 import java.util.List;
@@ -97,10 +97,12 @@ public final class PluginMessageUtil {
   /**
    * Fetches all the channels in a register or unregister plugin message.
    *
+   * @param existingChannels the number of channels already registered
    * @param message the message to get the channels from
    * @return the channels, as an immutable list
    */
-  public static List<ChannelIdentifier> getChannels(PluginMessagePacket message,
+  public static List<ChannelIdentifier> getChannels(int existingChannels,
+                                                    PluginMessagePacket message,
                                                     ProtocolVersion protocolVersion) {
     checkNotNull(message, "message");
     checkArgument(isRegister(message) || isUnregister(message), "Unknown channel type %s",
@@ -111,8 +113,11 @@ public final class PluginMessageUtil {
       return ImmutableList.of();
     }
     String payload = message.content().toString(StandardCharsets.UTF_8);
+    checkArgument(payload.length() <= Short.MAX_VALUE, "payload too long: %s", payload.length());
     String[] channels = payload.split("\0");
-    List<ChannelIdentifier> channelIdentifiers = new ArrayList<>();
+    checkArgument(existingChannels + channels.length <= ConnectedPlayer.MAX_CLIENTSIDE_PLUGIN_CHANNELS,
+        "too many channels: %s + %s > %s", existingChannels, channels.length, ConnectedPlayer.MAX_CLIENTSIDE_PLUGIN_CHANNELS);
+    ImmutableList.Builder<ChannelIdentifier> channelIdentifiers = ImmutableList.builderWithExpectedSize(channels.length);
     try {
       for (String channel : channels) {
         if (protocolVersion.noLessThan(ProtocolVersion.MINECRAFT_1_13)) {
@@ -128,7 +133,7 @@ public final class PluginMessageUtil {
         throw ILLEGAL_CHANNEL;
       }
     }
-    return ImmutableList.copyOf(channelIdentifiers);
+    return channelIdentifiers.build();
   }
 
   /**

proxy/src/main/java/com/velocitypowered/proxy/server/VelocityRegisteredServer.java

@@ -114,7 +114,7 @@ public class VelocityRegisteredServer implements RegisteredServer, ForwardingAud
     server.createBootstrap(loop).handler(new ChannelInitializer<>() {
       @Override
       protected void initChannel(Channel ch) {
-        ch.pipeline().addLast(FRAME_DECODER, new MinecraftVarintFrameDecoder())
+        ch.pipeline().addLast(FRAME_DECODER, new MinecraftVarintFrameDecoder(ProtocolUtils.Direction.CLIENTBOUND))
             .addLast(READ_TIMEOUT, new ReadTimeoutHandler(
                 pingOptions.getTimeout() == 0
                     ? server.getConfiguration().getReadTimeout()

proxy/src/main/java/com/velocitypowered/proxy/util/TranslatableMapper.java

@@ -24,9 +24,6 @@ import net.kyori.adventure.text.Component;
 import net.kyori.adventure.text.TranslatableComponent;
 import net.kyori.adventure.text.flattener.ComponentFlattener;
 import net.kyori.adventure.translation.GlobalTranslator;
-import net.kyori.adventure.translation.TranslationRegistry;
-import net.kyori.adventure.translation.Translator;
-import org.jetbrains.annotations.Nullable;
 
 /**
  * Velocity Translation Mapper.
@@ -43,25 +40,9 @@ public enum TranslatableMapper implements BiConsumer<TranslatableComponent, Cons
           final TranslatableComponent translatableComponent,
           final Consumer<Component> componentConsumer
   ) {
-    for (final Translator source : GlobalTranslator.translator().sources()) {
+    final Locale locale = ClosestLocaleMatcher.INSTANCE.lookupClosest(Locale.getDefault());
-      if (source instanceof TranslationRegistry registry
+    if (GlobalTranslator.translator().canTranslate(translatableComponent.key(), locale)) {
-              && registry.contains(translatableComponent.key())) {
+      componentConsumer.accept(GlobalTranslator.render(translatableComponent, locale));
-        componentConsumer.accept(GlobalTranslator.render(translatableComponent,
-                ClosestLocaleMatcher.INSTANCE.lookupClosest(Locale.getDefault())));
-        return;
-      }
-    }
-    final @Nullable String fallback = translatableComponent.fallback();
-    if (fallback == null) {
-      return;
-    }
-    for (final Translator source : GlobalTranslator.translator().sources()) {
-      if (source instanceof TranslationRegistry registry && registry.contains(fallback)) {
-        componentConsumer.accept(
-                GlobalTranslator.render(Component.translatable(fallback),
-                        ClosestLocaleMatcher.INSTANCE.lookupClosest(Locale.getDefault())));
-        return;
-      }
     }
   }
 }

proxy/src/main/resources/com/velocitypowered/proxy/l10n/messages_bg_BG.properties

@@ -35,7 +35,7 @@ velocity.command.generic-error=Възникна грешка при изпълн
 velocity.command.command-does-not-exist=Тази команда не съществува.
 velocity.command.players-only=Само играчи могат да изпълняват тази команда.
 velocity.command.server-does-not-exist=Сървър с името {0} не съществува.
-velocity.command.player-not-found=Този играч {0} не съществува.
+velocity.command.player-not-found=Играч с името {0} не съществува.
 velocity.command.server-current-server=В момента сте свързан към {0}.
 velocity.command.server-too-many=Има прекалено много регистрирани сървъри. Използвайте TAB, за да видите всички налични сървъри.
 velocity.command.server-available=Налични сървъри\:

proxy/src/main/resources/com/velocitypowered/proxy/l10n/messages_es_ES.properties

@@ -29,7 +29,7 @@ velocity.error.modern-forwarding-needs-new-client=Este servidor solo es compatib
 velocity.error.modern-forwarding-failed=El servidor no ha enviado una solicitud de reenvío al proxy. Asegúrate de que tu servidor está configurado para usar el método de reenvío de Velocity.
 velocity.error.moved-to-new-server=Has sido echado de {0}\: {1}
 velocity.error.no-available-servers=No hay servidores disponibles a los que conectarte. Inténtalo de nuevo más tarde o contacta con un administrador.
-velocity.error.illegal-chat-characters=Illegal characters in chat
+velocity.error.illegal-chat-characters=Caracteres no válidos en el chat
 # Commands
 velocity.command.generic-error=Se ha producido un error al ejecutar este comando.
 velocity.command.command-does-not-exist=Este comando no existe.
@@ -60,6 +60,6 @@ velocity.command.dump-success=Se ha creado un informe anónimo que contiene info
 velocity.command.dump-will-expire=Este enlace caducará en unos días.
 velocity.command.dump-server-error=Se ha producido un error en los servidores de Velocity y la subida no se ha podido completar. Notifica al equipo de Velocity sobre este problema y proporciona los detalles sobre este error disponibles en el archivo de registro o la consola de tu servidor Velocity.
 velocity.command.dump-offline=Causa probable\: la configuración DNS del sistema no es válida o no hay conexión a internet
-velocity.command.send-usage=/send <player> <server>
+velocity.command.send-usage=/send <jugador> <servidor>
 # Kick
-velocity.kick.shutdown=Proxy shutting down.
+velocity.kick.shutdown=El proxy se ha apagado.

steamwarci.yml

@@ -0,0 +1,9 @@
+build:
+  - "./gradlew build -x check -x javadoc --no-daemon"
+
+
+artifacts:
+  "/jars/Velocity.jar": "proxy/build/libs/velocity-proxy-3.4.0-SNAPSHOT-all.jar"
+
+release:
+  - "mvn deploy:deploy-file -DgroupId=de.steamwar -DartifactId=velocity -Dversion=RELEASE -Dpackaging=jar -Dfile=/jars/Velocity.jar -Durl=file:///var/www/maven/"