Actually fix the login plugin messaging

src/main/java/com/velocitypowered/proxy/config/VelocityConfiguration.java

@@ -67,9 +67,6 @@ public class VelocityConfiguration {
             case NONE:
                 logger.info("IP forwarding is disabled! All players will appear to be connecting from the proxy and will have offline-mode UUIDs.");
                 break;
-            case MODERN:
-                logger.warn("Modern IP forwarding is not currently implemented.");
-                break;
         }
 
         if (servers.isEmpty()) {

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

@@ -171,6 +171,9 @@ public class MinecraftConnection extends ChannelInboundHandlerAdapter {
     }
 
     public void setSessionHandler(MinecraftSessionHandler sessionHandler) {
+        if (this.sessionHandler != null) {
+            this.sessionHandler.deactivated();
+        }
         this.sessionHandler = sessionHandler;
         sessionHandler.activated();
     }

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

@@ -22,6 +22,10 @@ public interface MinecraftSessionHandler {
 
     }
 
+    default void deactivated() {
+
+    }
+
     default void exception(Throwable throwable) {
 
     }

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

@@ -22,7 +22,7 @@ public class BackendPlaySessionHandler implements MinecraftSessionHandler {
                 (ClientPlaySessionHandler) connection.getProxyPlayer().getConnection().getSessionHandler();
         if (packet instanceof KeepAlive) {
             // Forward onto the server
-            connection.getChannel().write(packet);
+            connection.getMinecraftConnection().write(packet);
         } else if (packet instanceof Disconnect) {
             Disconnect original = (Disconnect) packet;
             connection.getProxyPlayer().handleConnectionException(connection.getServerInfo(), original);
@@ -92,7 +92,7 @@ public class BackendPlaySessionHandler implements MinecraftSessionHandler {
     private boolean canForwardPluginMessage(PluginMessage message) {
         ClientPlaySessionHandler playerHandler =
                 (ClientPlaySessionHandler) connection.getProxyPlayer().getConnection().getSessionHandler();
-        if (connection.getChannel().getProtocolVersion() <= ProtocolConstants.MINECRAFT_1_12_2) {
+        if (connection.getMinecraftConnection().getProtocolVersion() <= ProtocolConstants.MINECRAFT_1_12_2) {
             return message.getChannel().startsWith("MC|") ||
                     playerHandler.getClientPluginMsgChannels().contains(message.getChannel());
         } else {

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

@@ -1,29 +1,69 @@
 package com.velocitypowered.proxy.connection.backend;
 
+import com.velocitypowered.proxy.VelocityServer;
+import com.velocitypowered.proxy.config.IPForwardingMode;
+import com.velocitypowered.proxy.connection.VelocityConstants;
 import com.velocitypowered.proxy.connection.client.ClientPlaySessionHandler;
+import com.velocitypowered.proxy.data.GameProfile;
 import com.velocitypowered.proxy.protocol.MinecraftPacket;
+import com.velocitypowered.proxy.protocol.ProtocolUtils;
 import com.velocitypowered.proxy.protocol.StateRegistry;
 import com.velocitypowered.proxy.protocol.packets.*;
 import com.velocitypowered.proxy.connection.MinecraftSessionHandler;
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.Unpooled;
+import net.kyori.text.TextComponent;
+
+import java.util.concurrent.ScheduledFuture;
+import java.util.concurrent.TimeUnit;
 
 public class LoginSessionHandler implements MinecraftSessionHandler {
     private final ServerConnection connection;
-    private int forwardingPacketId = -1;
+    private ScheduledFuture<?> modernForwardingNotice;
 
     public LoginSessionHandler(ServerConnection connection) {
         this.connection = connection;
     }
 
+    @Override
+    public void activated() {
+        if (VelocityServer.getServer().getConfiguration().getIpForwardingMode() == IPForwardingMode.MODERN) {
+            modernForwardingNotice = connection.getMinecraftConnection().getChannel().eventLoop().schedule(() -> {
+                connection.getProxyPlayer().handleConnectionException(connection.getServerInfo(),
+                        TextComponent.of("Your server did not send the forwarding request in time. Is it set up correctly?"));
+            }, 1, TimeUnit.SECONDS);
+        }
+    }
+
     @Override
     public void handle(MinecraftPacket packet) {
         if (packet instanceof EncryptionRequest) {
             throw new IllegalStateException("Backend server is online-mode!");
-        } else if (packet instanceof LoginPluginResponse) {
+        } else if (packet instanceof LoginPluginMessage) {
-            LoginPluginResponse lpr = (LoginPluginResponse) packet;
+            LoginPluginMessage message = (LoginPluginMessage) packet;
-            if (lpr.getId() == forwardingPacketId) {
+            if (VelocityServer.getServer().getConfiguration().getIpForwardingMode() == IPForwardingMode.MODERN &&
-                if (!lpr.isSuccess()) {
+                    message.getChannel().equals(VelocityConstants.VELOCITY_IP_FORWARDING_CHANNEL)) {
-                    throw new IllegalStateException("Unable to forward player information to server! Is it configured properly?");
+                LoginPluginResponse response = new LoginPluginResponse();
+                response.setSuccess(true);
+                response.setId(message.getId());
+                response.setData(createForwardingData(connection.getProxyPlayer().getRemoteAddress().getHostString(),
+                        connection.getProxyPlayer().getProfile()));
+                connection.getMinecraftConnection().write(response);
+                if (modernForwardingNotice != null) {
+                    modernForwardingNotice.cancel(false);
+                    modernForwardingNotice = null;
                 }
+
+                ServerLogin login = new ServerLogin();
+                login.setUsername(connection.getProxyPlayer().getUsername());
+                connection.getMinecraftConnection().write(login);
+            } else {
+                // Don't understand
+                LoginPluginResponse response = new LoginPluginResponse();
+                response.setSuccess(false);
+                response.setId(message.getId());
+                response.setData(Unpooled.EMPTY_BUFFER);
+                connection.getMinecraftConnection().write(response);
             }
         } else if (packet instanceof Disconnect) {
             Disconnect disconnect = (Disconnect) packet;
@@ -31,10 +71,10 @@ public class LoginSessionHandler implements MinecraftSessionHandler {
             connection.getProxyPlayer().handleConnectionException(connection.getServerInfo(), disconnect);
         } else if (packet instanceof SetCompression) {
             SetCompression sc = (SetCompression) packet;
-            connection.getChannel().setCompressionThreshold(sc.getThreshold());
+            connection.getMinecraftConnection().setCompressionThreshold(sc.getThreshold());
         } else if (packet instanceof ServerLoginSuccess) {
             // The player has been logged on to the backend server.
-            connection.getChannel().setState(StateRegistry.PLAY);
+            connection.getMinecraftConnection().setState(StateRegistry.PLAY);
             ServerConnection existingConnection = connection.getProxyPlayer().getConnectedServer();
             if (existingConnection == null) {
                 // Strap on the play session handler
@@ -43,21 +83,41 @@ public class LoginSessionHandler implements MinecraftSessionHandler {
                 // The previous server connection should become obsolete.
                 existingConnection.disconnect();
             }
-            connection.getChannel().setSessionHandler(new BackendPlaySessionHandler(connection));
+            connection.getMinecraftConnection().setSessionHandler(new BackendPlaySessionHandler(connection));
             connection.getProxyPlayer().setConnectedServer(connection);
         }
     }
 
+    @Override
+    public void deactivated() {
+        if (modernForwardingNotice != null) {
+            modernForwardingNotice.cancel(false);
+            modernForwardingNotice = null;
+        }
+    }
+
     @Override
     public void exception(Throwable throwable) {
         connection.getProxyPlayer().handleConnectionException(connection.getServerInfo(), throwable);
     }
 
-    public int getForwardingPacketId() {
+    private static ByteBuf createForwardingData(String address, GameProfile profile) {
-        return forwardingPacketId;
+        ByteBuf buf = Unpooled.buffer();
-    }
+        ProtocolUtils.writeString(buf, address);
-
+        ProtocolUtils.writeString(buf, profile.getName());
-    public void setForwardingPacketId(int forwardingPacketId) {
+        ProtocolUtils.writeUuid(buf, profile.idAsUuid());
-        this.forwardingPacketId = forwardingPacketId;
+        ProtocolUtils.writeVarInt(buf, profile.getProperties().size());
+        for (GameProfile.Property property : profile.getProperties()) {
+            ProtocolUtils.writeString(buf, property.getName());
+            ProtocolUtils.writeString(buf, property.getValue());
+            String signature = property.getSignature();
+            if (signature != null) {
+                buf.writeBoolean(true);
+                ProtocolUtils.writeString(buf, signature);
+            } else {
+                buf.writeBoolean(false);
+            }
+        }
+        return buf;
     }
 }

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

@@ -2,28 +2,21 @@ package com.velocitypowered.proxy.connection.backend;
 
 import com.velocitypowered.proxy.config.IPForwardingMode;
 import com.velocitypowered.proxy.connection.MinecraftConnectionAssociation;
-import com.velocitypowered.proxy.connection.VelocityConstants;
-import com.velocitypowered.proxy.data.GameProfile;
 import com.velocitypowered.proxy.protocol.ProtocolConstants;
-import com.velocitypowered.proxy.protocol.ProtocolUtils;
 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.packets.Handshake;
-import com.velocitypowered.proxy.protocol.packets.LoginPluginMessage;
 import com.velocitypowered.proxy.protocol.packets.ServerLogin;
 import com.velocitypowered.proxy.connection.MinecraftConnection;
 import com.velocitypowered.proxy.protocol.StateRegistry;
 import com.velocitypowered.proxy.data.ServerInfo;
 import com.velocitypowered.proxy.VelocityServer;
 import com.velocitypowered.proxy.connection.client.ConnectedPlayer;
-import io.netty.buffer.ByteBuf;
-import io.netty.buffer.Unpooled;
 import io.netty.channel.*;
 import io.netty.handler.timeout.ReadTimeoutHandler;
 
-import java.util.concurrent.ThreadLocalRandom;
 import java.util.concurrent.TimeUnit;
 
 import static com.velocitypowered.network.Connections.FRAME_DECODER;
@@ -38,7 +31,7 @@ public class ServerConnection implements MinecraftConnectionAssociation {
     private final ServerInfo serverInfo;
     private final ConnectedPlayer proxyPlayer;
     private final VelocityServer server;
-    private MinecraftConnection channel;
+    private MinecraftConnection minecraftConnection;
 
     public ServerConnection(ServerInfo target, ConnectedPlayer proxyPlayer, VelocityServer server) {
         this.serverInfo = target;
@@ -60,7 +53,6 @@ public class ServerConnection implements MinecraftConnectionAssociation {
 
                         MinecraftConnection connection = new MinecraftConnection(ch);
                         connection.setState(StateRegistry.HANDSHAKE);
-                        connection.setSessionHandler(new LoginSessionHandler(ServerConnection.this));
                         connection.setAssociation(ServerConnection.this);
                         ch.pipeline().addLast(HANDLER, connection);
                     }
@@ -70,9 +62,10 @@ public class ServerConnection implements MinecraftConnectionAssociation {
                     @Override
                     public void operationComplete(ChannelFuture future) throws Exception {
                         if (future.isSuccess()) {
-                            channel = future.channel().pipeline().get(MinecraftConnection.class);
+                            minecraftConnection = future.channel().pipeline().get(MinecraftConnection.class);
 
                             // Kick off the connection process
+                            minecraftConnection.setSessionHandler(new LoginSessionHandler(ServerConnection.this));
                             startHandshake();
                         } else {
                             proxyPlayer.handleConnectionException(serverInfo, future.cause());
@@ -102,43 +95,27 @@ public class ServerConnection implements MinecraftConnectionAssociation {
             handshake.setServerAddress(serverInfo.getAddress().getHostString());
         }
         handshake.setPort(serverInfo.getAddress().getPort());
-        channel.write(handshake);
+        minecraftConnection.write(handshake);
 
         int protocolVersion = proxyPlayer.getConnection().getProtocolVersion();
-        channel.setProtocolVersion(protocolVersion);
+        minecraftConnection.setProtocolVersion(protocolVersion);
-        channel.setState(StateRegistry.LOGIN);
+        minecraftConnection.setState(StateRegistry.LOGIN);
 
-        // 1.13 stuff
+        // Send the server login packet for <=1.12.2 and for 1.13+ servers not using "modern" forwarding.
-        if (protocolVersion >= ProtocolConstants.MINECRAFT_1_13) {
+        if (protocolVersion <= ProtocolConstants.MINECRAFT_1_12_2 ||
-            if (VelocityServer.getServer().getConfiguration().getIpForwardingMode() == IPForwardingMode.MODERN) {
+                VelocityServer.getServer().getConfiguration().getIpForwardingMode() != IPForwardingMode.MODERN) {
-                // Velocity's IP forwarding includes the player's IP address and their game profile.
+            ServerLogin login = new ServerLogin();
-                GameProfile profile = proxyPlayer.getProfile();
+            login.setUsername(proxyPlayer.getUsername());
-                ByteBuf buf = createForwardingData(proxyPlayer.getRemoteAddress().getHostString(), profile);
+            minecraftConnection.write(login);
-
-                // Send the message on
-                LoginPluginMessage forwarding = new LoginPluginMessage();
-                forwarding.setId(ThreadLocalRandom.current().nextInt());
-                forwarding.setChannel(VelocityConstants.VELOCITY_IP_FORWARDING_CHANNEL);
-                forwarding.setData(buf);
-
-                LoginSessionHandler lsh = (LoginSessionHandler) channel.getSessionHandler();
-                lsh.setForwardingPacketId(forwarding.getId());
-                channel.write(forwarding);
-            }
         }
-
-        // Login
-        ServerLogin login = new ServerLogin();
-        login.setUsername(proxyPlayer.getUsername());
-        channel.write(login);
     }
 
     public ConnectedPlayer getProxyPlayer() {
         return proxyPlayer;
     }
 
-    public MinecraftConnection getChannel() {
+    public MinecraftConnection getMinecraftConnection() {
-        return channel;
+        return minecraftConnection;
     }
 
     public ServerInfo getServerInfo() {
@@ -146,32 +123,12 @@ public class ServerConnection implements MinecraftConnectionAssociation {
     }
 
     public void disconnect() {
-        channel.close();
+        minecraftConnection.close();
-        channel = null;
+        minecraftConnection = null;
     }
 
     @Override
     public String toString() {
         return "[server connection] " + proxyPlayer.getProfile().getName() + " -> " + serverInfo.getName();
     }
-
-    private static ByteBuf createForwardingData(String address, GameProfile profile) {
-        ByteBuf buf = Unpooled.buffer();
-        ProtocolUtils.writeString(buf, address);
-        ProtocolUtils.writeString(buf, profile.getName());
-        ProtocolUtils.writeUuid(buf, profile.idAsUuid());
-        ProtocolUtils.writeVarInt(buf, profile.getProperties().size());
-        for (GameProfile.Property property : profile.getProperties()) {
-            ProtocolUtils.writeString(buf, property.getName());
-            ProtocolUtils.writeString(buf, property.getValue());
-            String signature = property.getSignature();
-            if (signature != null) {
-                buf.writeBoolean(true);
-                ProtocolUtils.writeString(buf, signature);
-            } else {
-                buf.writeBoolean(false);
-            }
-        }
-        return buf;
-    }
 }

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

@@ -93,18 +93,18 @@ public class ClientPlaySessionHandler implements MinecraftSessionHandler {
         }
 
         // If we don't want to handle this packet, just forward it on.
-        player.getConnectedServer().getChannel().write(packet);
+        player.getConnectedServer().getMinecraftConnection().write(packet);
     }
 
     @Override
     public void handleUnknown(ByteBuf buf) {
         ByteBuf remapped = idRemapper.remap(buf, ProtocolConstants.Direction.SERVERBOUND);
-        player.getConnectedServer().getChannel().write(remapped);
+        player.getConnectedServer().getMinecraftConnection().write(remapped);
     }
 
     @Override
     public void disconnected() {
-        player.getConnectedServer().disconnect();
+        player.teardown();
 
         if (pingTask != null && !pingTask.isCancelled()) {
             pingTask.cancel(false);
@@ -150,7 +150,7 @@ public class ClientPlaySessionHandler implements MinecraftSessionHandler {
         // Resend client settings packet to remote server if we have it, this preserves client settings across
         // transitions.
         if (player.getClientSettings() != null) {
-            player.getConnectedServer().getChannel().delayedWrite(player.getClientSettings());
+            player.getConnectedServer().getMinecraftConnection().delayedWrite(player.getClientSettings());
         }
 
         // Remove old boss bars.
@@ -169,19 +169,19 @@ public class ClientPlaySessionHandler implements MinecraftSessionHandler {
         if (!clientPluginMsgChannels.isEmpty()) {
             String channel = player.getConnection().getProtocolVersion() >= ProtocolConstants.MINECRAFT_1_13 ?
                     "minecraft:register" : "REGISTER";
-            player.getConnectedServer().getChannel().delayedWrite(
+            player.getConnectedServer().getMinecraftConnection().delayedWrite(
                     PluginMessageUtil.constructChannelsPacket(channel, clientPluginMsgChannels));
         }
 
         // Tell the server the client's brand
         if (brandMessage != null) {
             brandMessage.getData().retain();
-            player.getConnectedServer().getChannel().delayedWrite(brandMessage);
+            player.getConnectedServer().getMinecraftConnection().delayedWrite(brandMessage);
         }
 
         // Flush everything
         player.getConnection().flush();
-        player.getConnectedServer().getChannel().flush();
+        player.getConnectedServer().getMinecraftConnection().flush();
     }
 
     public void setCurrentDimension(int currentDimension) {
@@ -213,7 +213,7 @@ public class ClientPlaySessionHandler implements MinecraftSessionHandler {
                 if (actuallyRegistered.size() > 0) {
                     logger.info("Rewritten register packet: {}", actuallyRegistered);
                     PluginMessage newRegisterPacket = PluginMessageUtil.constructChannelsPacket(packet.getChannel(), actuallyRegistered);
-                    player.getConnectedServer().getChannel().write(newRegisterPacket);
+                    player.getConnectedServer().getMinecraftConnection().write(newRegisterPacket);
                 }
 
                 return;
@@ -242,7 +242,7 @@ public class ClientPlaySessionHandler implements MinecraftSessionHandler {
                 packet.getData().retain();
             }
 
-            player.getConnectedServer().getChannel().write(packet);
+            player.getConnectedServer().getMinecraftConnection().write(packet);
         } finally {
             ReferenceCountUtil.release(original.getData());
         }

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

@@ -21,6 +21,7 @@ import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
 
 import java.net.InetSocketAddress;
+import java.util.Collection;
 import java.util.List;
 import java.util.Optional;
 import java.util.UUID;
@@ -35,6 +36,7 @@ public class ConnectedPlayer implements MinecraftConnectionAssociation {
     private int tryIndex = 0;
     private ServerConnection connectedServer;
     private ClientSettings clientSettings;
+    private ServerConnection connectionInFlight;
 
     public ConnectedPlayer(GameProfile profile, MinecraftConnection connection) {
         this.profile = profile;
@@ -101,7 +103,7 @@ public class ConnectedPlayer implements MinecraftConnectionAssociation {
         handleConnectionException(info, disconnectReason);
     }
 
-    private void handleConnectionException(ServerInfo info, Component disconnectReason) {
+    public void handleConnectionException(ServerInfo info, Component disconnectReason) {
         if (connectedServer == null || connectedServer.getServerInfo().equals(info)) {
             // The player isn't yet connected to a server or they are already connected to the server
             // they're disconnected from.
@@ -124,7 +126,9 @@ public class ConnectedPlayer implements MinecraftConnectionAssociation {
 
     public void connect(ServerInfo info) {
         Preconditions.checkNotNull(info, "info");
+        Preconditions.checkState(connectionInFlight == null, "A connection is already active!");
         ServerConnection connection = new ServerConnection(info, this, VelocityServer.getServer());
+        connectionInFlight = connection;
         connection.connect();
     }
 
@@ -139,6 +143,15 @@ public class ConnectedPlayer implements MinecraftConnectionAssociation {
         connection.closeWith(Disconnect.create(reason));
     }
 
+    public void teardown() {
+        if (connectionInFlight != null) {
+            connectionInFlight.disconnect();
+        }
+        if (connectedServer != null) {
+            connectedServer.disconnect();
+        }
+    }
+
     @Override
     public String toString() {
         return "[connected player] " + getProfile().getName() + " (" + getRemoteAddress() + ")";

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

@@ -18,6 +18,6 @@ public class InitialConnectSessionHandler implements MinecraftSessionHandler {
     @Override
     public void disconnected() {
         // the user cancelled the login process
-        player.getConnectedServer().disconnect();
+        player.teardown();
     }
 }

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

@@ -4,6 +4,7 @@ import com.google.common.base.Preconditions;
 import com.velocitypowered.proxy.connection.VelocityConstants;
 import com.velocitypowered.proxy.data.GameProfile;
 import com.velocitypowered.proxy.protocol.MinecraftPacket;
+import com.velocitypowered.proxy.protocol.ProtocolConstants;
 import com.velocitypowered.proxy.protocol.StateRegistry;
 import com.velocitypowered.proxy.protocol.packets.*;
 import com.velocitypowered.proxy.connection.MinecraftConnection;
@@ -35,27 +36,33 @@ public class LoginSessionHandler implements MinecraftSessionHandler {
     private final MinecraftConnection inbound;
     private ServerLogin login;
     private byte[] verify;
+    private int playerInfoId;
 
     public LoginSessionHandler(MinecraftConnection inbound) {
         this.inbound = Preconditions.checkNotNull(inbound, "inbound");
     }
 
+    @Override
+    public void activated() {
+        if (inbound.getProtocolVersion() >= ProtocolConstants.MINECRAFT_1_13) {
+            LoginPluginMessage message = new LoginPluginMessage();
+            playerInfoId = ThreadLocalRandom.current().nextInt();
+            message.setId(playerInfoId);
+            message.setChannel(VelocityConstants.VELOCITY_IP_FORWARDING_CHANNEL);
+            message.setData(Unpooled.EMPTY_BUFFER);
+            inbound.write(message);
+        }
+    }
+
     @Override
     public void handle(MinecraftPacket packet) throws Exception {
-        if (packet instanceof LoginPluginMessage) {
+        if (packet instanceof LoginPluginResponse) {
-            LoginPluginMessage lpm = (LoginPluginMessage) packet;
+            LoginPluginResponse lpr = (LoginPluginResponse) packet;
-            if (lpm.getChannel().equals(VelocityConstants.VELOCITY_IP_FORWARDING_CHANNEL)) {
+            if (lpr.getId() == playerInfoId && lpr.isSuccess()) {
                 // Uh oh, someone's trying to run Velocity behind Velocity. We don't want that happening.
                 inbound.closeWith(Disconnect.create(
                         TextComponent.of("Running Velocity behind Velocity isn't supported.", TextColor.RED)
                 ));
-            } else {
-                // We don't know what this message is.
-                LoginPluginResponse response = new LoginPluginResponse();
-                response.setId(lpm.getId());
-                response.setSuccess(false);
-                response.setData(Unpooled.EMPTY_BUFFER);
-                inbound.write(response);
             }
         } else if (packet instanceof ServerLogin) {
             this.login = (ServerLogin) packet;

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

@@ -108,7 +108,7 @@ public enum StateRegistry {
                     genericMappings(0x00));
             SERVERBOUND.register(EncryptionResponse.class, EncryptionResponse::new,
                     genericMappings(0x01));
-            SERVERBOUND.register(LoginPluginMessage.class, LoginPluginMessage::new,
+            SERVERBOUND.register(LoginPluginResponse.class, LoginPluginResponse::new,
                     map(0x02, MINECRAFT_1_13));
 
             CLIENTBOUND.register(Disconnect.class, Disconnect::new,
@@ -119,7 +119,7 @@ public enum StateRegistry {
                     genericMappings(0x02));
             CLIENTBOUND.register(SetCompression.class, SetCompression::new,
                     genericMappings(0x03));
-            CLIENTBOUND.register(LoginPluginResponse.class, LoginPluginResponse::new,
+            CLIENTBOUND.register(LoginPluginMessage.class, LoginPluginMessage::new,
                     map(0x04, MINECRAFT_1_13));
         }
     };