BungeeCord and Velocity info forwarding support

src/main/java/ru/nanit/limbo/protocol/ByteMessage.java

@@ -66,7 +66,7 @@ public class ByteMessage extends ByteBuf {
         return readString(readVarInt());
     }
 
-    private String readString(int length) {
+    public String readString(int length) {
         String str = buf.toString(buf.readerIndex(), length, StandardCharsets.UTF_8);
         buf.skipBytes(length);
         return str;

src/main/java/ru/nanit/limbo/protocol/packets/login/PacketLoginPluginRequest.java

@@ -0,0 +1,32 @@
+package ru.nanit.limbo.protocol.packets.login;
+
+import io.netty.buffer.ByteBuf;
+import ru.nanit.limbo.protocol.ByteMessage;
+import ru.nanit.limbo.protocol.PacketOut;
+
+public class PacketLoginPluginRequest implements PacketOut {
+
+    private int messageId;
+    private String channel;
+    private ByteBuf data;
+
+    public void setMessageId(int messageId) {
+        this.messageId = messageId;
+    }
+
+    public void setChannel(String channel) {
+        this.channel = channel;
+    }
+
+    public void setData(ByteBuf data) {
+        this.data = data;
+    }
+
+    @Override
+    public void encode(ByteMessage msg) {
+        msg.writeVarInt(messageId);
+        msg.writeString(channel);
+        msg.writeBytes(data);
+    }
+
+}

src/main/java/ru/nanit/limbo/protocol/packets/login/PacketLoginPluginResponse.java

@@ -0,0 +1,35 @@
+package ru.nanit.limbo.protocol.packets.login;
+
+import ru.nanit.limbo.protocol.ByteMessage;
+import ru.nanit.limbo.protocol.PacketIn;
+
+public class PacketLoginPluginResponse implements PacketIn {
+
+    private int messageId;
+    private boolean successful;
+    private ByteMessage data;
+
+    public int getMessageId() {
+        return messageId;
+    }
+
+    public boolean isSuccessful() {
+        return successful;
+    }
+
+    public ByteMessage getData() {
+        return data;
+    }
+
+    @Override
+    public void decode(ByteMessage msg) {
+        messageId = msg.readVarInt();
+        successful = msg.readBoolean();
+
+        if (msg.readableBytes() > 0){
+            int i = msg.readableBytes();
+            data = new ByteMessage(msg.readBytes(i));
+        }
+    }
+
+}

src/main/java/ru/nanit/limbo/protocol/pipeline/PacketDecoder.java

@@ -41,5 +41,4 @@ public class PacketDecoder extends MessageToMessageDecoder<ByteBuf> {
     public void updateState(State state){
         this.mappings = state.serverBound;
     }
-
 }

src/main/java/ru/nanit/limbo/protocol/registry/State.java

@@ -30,8 +30,10 @@ public enum State {
     LOGIN(2){
         {
             serverBound.register(0x00, PacketLoginStart::new);
+            serverBound.register(0x02, PacketLoginPluginResponse::new);
             clientBound.register(0x00, PacketDisconnect::new);
             clientBound.register(0x02, PacketLoginSuccess::new);
+            clientBound.register(0x04, PacketLoginPluginRequest::new);
         }
     },
     PLAY(3){