Basically done with login

protocol/src/main/java/net/md_5/bungee/protocol/AbstractPacketHandler.java

@@ -19,10 +19,25 @@ import net.md_5.bungee.protocol.packet.Handshake;
 import net.md_5.bungee.protocol.packet.EncryptionResponse;
 import net.md_5.bungee.protocol.packet.LoginRequest;
 import net.md_5.bungee.protocol.packet.LoginSuccess;
+import net.md_5.bungee.protocol.packet.PingPacket;
+import net.md_5.bungee.protocol.packet.StatusRequest;
+import net.md_5.bungee.protocol.packet.StatusResponse;
 
 public abstract class AbstractPacketHandler
 {
 
+    public void handle(PingPacket ping) throws Exception
+    {
+    }
+
+    public void handle(StatusRequest statusRequest) throws Exception
+    {
+    }
+
+    public void handle(StatusResponse statusResponse) throws Exception
+    {
+    }
+
     public void handle(Handshake handshake) throws Exception
     {
     }

protocol/src/main/java/net/md_5/bungee/protocol/MinecraftCodec.java

@@ -23,6 +23,8 @@ public class MinecraftCodec extends MessageToMessageCodec<ByteBuf, DefinedPacket
         ByteBuf buf = ctx.alloc().buffer();
         DefinedPacket.writeVarInt( prot.getId( msg.getClass() ), buf );
         msg.write( buf );
+        
+        out.add( buf );
     }
 
     @Override

protocol/src/main/java/net/md_5/bungee/protocol/Protocol.java

@@ -1,5 +1,6 @@
 package net.md_5.bungee.protocol;
 
+import com.google.common.base.Preconditions;
 import gnu.trove.map.TObjectIntMap;
 import gnu.trove.map.hash.TObjectIntHashMap;
 import java.lang.reflect.Constructor;
@@ -13,12 +14,15 @@ import net.md_5.bungee.protocol.packet.Kick;
 import net.md_5.bungee.protocol.packet.Login;
 import net.md_5.bungee.protocol.packet.LoginRequest;
 import net.md_5.bungee.protocol.packet.LoginSuccess;
+import net.md_5.bungee.protocol.packet.PingPacket;
 import net.md_5.bungee.protocol.packet.PlayerListItem;
 import net.md_5.bungee.protocol.packet.PluginMessage;
 import net.md_5.bungee.protocol.packet.Respawn;
 import net.md_5.bungee.protocol.packet.ScoreboardDisplay;
 import net.md_5.bungee.protocol.packet.ScoreboardObjective;
 import net.md_5.bungee.protocol.packet.ScoreboardScore;
+import net.md_5.bungee.protocol.packet.StatusRequest;
+import net.md_5.bungee.protocol.packet.StatusResponse;
 import net.md_5.bungee.protocol.packet.TabComplete;
 import net.md_5.bungee.protocol.packet.Team;
 
@@ -63,6 +67,11 @@ public enum Protocol
     {
         
         {
+            TO_CLIENT.registerPacket( 0x00, StatusResponse.class );
+            TO_CLIENT.registerPacket( 0x01, PingPacket.class );
+
+            TO_SERVER.registerPacket( 0x00, StatusRequest.class );
+            TO_SERVER.registerPacket( 0x01, PingPacket.class );
         }
     },
     //2
@@ -140,6 +149,8 @@ public enum Protocol
 
         final int getId(Class<? extends DefinedPacket> packet)
         {
+            Preconditions.checkArgument( packetMap.containsKey( packet ), "Cannot get ID for packet " + packet );
+
             return packetMap.get( packet );
         }
     }

protocol/src/main/java/net/md_5/bungee/protocol/Varint21LengthFieldPrepender.java

@@ -17,7 +17,7 @@ public class Varint21LengthFieldPrepender extends MessageToByteEncoder<ByteBuf>
         out.ensureWritable( headerLen + bodyLen );
 
         DefinedPacket.writeVarInt( bodyLen, out );
-        out.writeBytes( msg, msg.readerIndex(), bodyLen );
+        out.writeBytes( msg );
     }
 
     private static int varintSize(int paramInt)

protocol/src/main/java/net/md_5/bungee/protocol/packet/PingPacket.java

@@ -0,0 +1,37 @@
+package net.md_5.bungee.protocol.packet;
+
+import io.netty.buffer.ByteBuf;
+import lombok.AllArgsConstructor;
+import lombok.Data;
+import lombok.EqualsAndHashCode;
+import lombok.NoArgsConstructor;
+import net.md_5.bungee.protocol.AbstractPacketHandler;
+import net.md_5.bungee.protocol.DefinedPacket;
+
+@Data
+@NoArgsConstructor
+@AllArgsConstructor
+@EqualsAndHashCode(callSuper = false)
+public class PingPacket extends DefinedPacket
+{
+
+    private long time;
+
+    @Override
+    public void read(ByteBuf buf)
+    {
+        time = buf.readLong();
+    }
+
+    @Override
+    public void write(ByteBuf buf)
+    {
+        buf.writeLong( time );
+    }
+
+    @Override
+    public void handle(AbstractPacketHandler handler) throws Exception
+    {
+        handler.handle( this );
+    }
+}

protocol/src/main/java/net/md_5/bungee/protocol/packet/StatusRequest.java

@@ -0,0 +1,31 @@
+package net.md_5.bungee.protocol.packet;
+
+import io.netty.buffer.ByteBuf;
+import lombok.Data;
+import lombok.EqualsAndHashCode;
+import lombok.NoArgsConstructor;
+import net.md_5.bungee.protocol.AbstractPacketHandler;
+import net.md_5.bungee.protocol.DefinedPacket;
+
+@Data
+@NoArgsConstructor
+@EqualsAndHashCode(callSuper = false)
+public class StatusRequest extends DefinedPacket
+{
+
+    @Override
+    public void read(ByteBuf buf)
+    {
+    }
+
+    @Override
+    public void write(ByteBuf buf)
+    {
+    }
+
+    @Override
+    public void handle(AbstractPacketHandler handler) throws Exception
+    {
+        handler.handle( this );
+    }
+}

protocol/src/main/java/net/md_5/bungee/protocol/packet/StatusResponse.java

@@ -0,0 +1,37 @@
+package net.md_5.bungee.protocol.packet;
+
+import io.netty.buffer.ByteBuf;
+import lombok.AllArgsConstructor;
+import lombok.Data;
+import lombok.EqualsAndHashCode;
+import lombok.NoArgsConstructor;
+import net.md_5.bungee.protocol.AbstractPacketHandler;
+import net.md_5.bungee.protocol.DefinedPacket;
+
+@Data
+@NoArgsConstructor
+@AllArgsConstructor
+@EqualsAndHashCode(callSuper = false)
+public class StatusResponse extends DefinedPacket
+{
+
+    private String response;
+
+    @Override
+    public void read(ByteBuf buf)
+    {
+        response = readString( buf );
+    }
+
+    @Override
+    public void write(ByteBuf buf)
+    {
+        writeString( response, buf );
+    }
+
+    @Override
+    public void handle(AbstractPacketHandler handler) throws Exception
+    {
+        handler.handle( this );
+    }
+}