Ping packet

src/main/java/mc/core/NetStream.java

@@ -4,12 +4,18 @@
  */
 package mc.core;
 
+import lombok.Getter;
+import lombok.Setter;
 import lombok.extern.slf4j.Slf4j;
 
 import java.nio.charset.StandardCharsets;
 
 @Slf4j
 public abstract class NetStream {
+    @Getter
+    @Setter
+    private int expectedSize;
+
     public static int sizeVarInt(final int value) {
         byte size = 0;
         int v = value;
@@ -74,4 +80,6 @@ public abstract class NetStream {
 
     public abstract void writeByte(int value);
     public abstract void writeBytes(byte[] buffer);
+
+
 }

src/main/java/mc/core/netty/PacketDecoder.java

@@ -59,6 +59,7 @@ public class PacketDecoder extends ByteToMessageDecoder {
             }
         } else {
             CSPacket packet = clientSidePacketClass.newInstance();
+            netStream.setExpectedSize(size - NetStream.sizeVarInt(id));
             packet.readSelf(netStream);
             out.add(packet);
         }

src/main/java/mc/core/netty/PacketHandler.java

@@ -12,6 +12,7 @@ import lombok.extern.slf4j.Slf4j;
 import mc.core.CSPacket;
 import mc.core.Config;
 import mc.core.Main;
+import mc.core.netty.packets.PingPacket;
 import mc.core.netty.packets.StatusRequest;
 import mc.core.netty.packets.StatusResponse;
 
@@ -51,4 +52,8 @@ public class PacketHandler extends SimpleChannelInboundHandler<CSPacket> {
 
         channel.writeAndFlush(pkt);
     }
+
+    public void onPingPacket(Channel channel, PingPacket packet) {
+        channel.writeAndFlush(packet);
+    }
 }

src/main/java/mc/core/netty/State.java

@@ -9,6 +9,7 @@ import io.netty.util.AttributeKey;
 import lombok.RequiredArgsConstructor;
 import mc.core.CSPacket;
 import mc.core.SCPacket;
+import mc.core.netty.packets.PingPacket;
 import mc.core.netty.packets.StatusRequest;
 import mc.core.netty.packets.StatusResponse;
 
@@ -21,9 +22,12 @@ public enum State {
     UNKNOWN(0, ImmutableMap.of(), ImmutableMap.of()),
     STATUS(1,
         ImmutableMap.of(
-            0, StatusRequest.class
+            0, StatusRequest.class,
-        ), ImmutableMap.of(
+            1, PingPacket.class
-            StatusResponse.class, 0
+        ),
+        ImmutableMap.of(
+            StatusResponse.class, 0,
+            PingPacket.class, 1
         )
     );
 

src/main/java/mc/core/netty/packets/PingPacket.java

@@ -0,0 +1,24 @@
+/*
+ * DmitriyMX <dimon550@gmail.com>
+ * 2018-04-08
+ */
+package mc.core.netty.packets;
+
+import mc.core.CSPacket;
+import mc.core.NetStream;
+import mc.core.SCPacket;
+
+public class PingPacket implements CSPacket, SCPacket {
+    private byte[] rawData;
+
+    @Override
+    public void readSelf(NetStream netStream) {
+        rawData = new byte[netStream.getExpectedSize()];
+        netStream.readBytes(rawData);
+    }
+
+    @Override
+    public byte[] toByteArray() {
+        return rawData;
+    }
+}