Acquire NetClientHandler for packets sent before the Player and World are established.

codechicken/lib/packet/PacketCustom.java

@@ -14,6 +14,7 @@ import codechicken.lib.vec.BlockCoord;
 import cpw.mods.fml.relauncher.Side;
 import cpw.mods.fml.relauncher.SideOnly;
 import cpw.mods.fml.common.network.FMLNetworkHandler;
+import cpw.mods.fml.common.network.IConnectionHandler;
 import cpw.mods.fml.common.network.IPacketHandler;
 import cpw.mods.fml.common.network.ITinyPacketHandler;
 import cpw.mods.fml.common.network.NetworkModHandler;
@@ -28,10 +29,12 @@ import net.minecraft.item.ItemStack;
 import net.minecraft.nbt.CompressedStreamTools;
 import net.minecraft.nbt.NBTTagCompound;
 import net.minecraft.network.INetworkManager;
+import net.minecraft.network.NetLoginHandler;
 import net.minecraft.network.NetServerHandler;
 import net.minecraft.network.packet.NetHandler;
 import net.minecraft.network.packet.Packet;
 import net.minecraft.network.packet.Packet131MapData;
+import net.minecraft.network.packet.Packet1Login;
 import net.minecraft.network.packet.Packet250CustomPayload;
 import net.minecraft.server.MinecraftServer;
 import net.minecraft.server.management.PlayerInstance;
@@ -148,6 +151,7 @@ public final class PacketCustom implements MCDataInput, MCDataOutput
         public ClientPacketHandler(String channel) 
         {
             super(channel);
+            NetClientHandlerHelper.register();
         }
 
         @Override
@@ -159,7 +163,7 @@ public final class PacketCustom implements MCDataInput, MCDataOutput
         @Override
         public void handle(ICustomPacketHandler handler, PacketCustom packet, Player player) 
         {
-            ((IClientPacketHandler)handler).handlePacket(packet, Minecraft.getMinecraft().getNetHandler(), Minecraft.getMinecraft());
+            ((IClientPacketHandler)handler).handlePacket(packet, NetClientHandlerHelper.handler, Minecraft.getMinecraft());
         }
     }
     
@@ -254,6 +258,54 @@ public final class PacketCustom implements MCDataInput, MCDataOutput
         }
     }
     
+    private static class NetClientHandlerHelper implements IConnectionHandler
+    {
+        private static boolean registered = false;
+        public static NetClientHandler handler;
+        
+        public static void register()
+        {
+            if(registered)
+                return;
+            
+            NetworkRegistry.instance().registerConnectionHandler(new NetClientHandlerHelper());
+            registered = true;
+        }
+        
+        @Override
+        public void connectionOpened(NetHandler netClientHandler, MinecraftServer server, INetworkManager manager)
+        {
+            handler = (NetClientHandler) netClientHandler;
+        }
+        
+        @Override
+        public void connectionOpened(NetHandler netClientHandler, String server, int port, INetworkManager manager)
+        {
+            handler = (NetClientHandler) netClientHandler;
+        }
+        
+        @Override
+        public void connectionClosed(INetworkManager manager)
+        {
+        }
+        
+        @Override
+        public String connectionReceived(NetLoginHandler netHandler, INetworkManager manager)
+        {
+            return null;
+        }
+        
+        @Override
+        public void clientLoggedIn(NetHandler clientHandler, INetworkManager manager, Packet1Login login)
+        {
+        }
+        
+        @Override
+        public void playerLoggedIn(Player player, NetHandler netHandler, INetworkManager manager)
+        {
+        }
+    }
+    
     public static interface IPacketCarrier
     {
         public int readType(Packet packet);