Jump to content

[1.8.9] Error receiving packet from Spigot Server [solved?]


JoelGodOfWar

Recommended Posts

I can send a packet to my Spigot plugin, and can send one back to my Forge mod, but when the mod tries to decode the message i get an error. The client message to the server is simply 1234567890, the response from the plugin is AaBbCcDdEe. I feel like i'm missing something simple. I've searched google for days, and there are a lot of tutorials on sending packets, but none on receiving them. The plugin is receiving, and sending on channel "JSCM|INIT".

 

Error

[22:51:17] [Netty Client IO #1/ERROR] [FML]: FMLIndexedMessageCodec exception caught
io.netty.handler.codec.DecoderException: java.lang.NullPointerException: Undefined message for discriminator 48 in channel JSCM|INIT
at io.netty.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:99) ~[MessageToMessageDecoder.class:4.0.23.Final]
at io.netty.handler.codec.MessageToMessageCodec.channelRead(MessageToMessageCodec.java:111) ~[MessageToMessageCodec.class:4.0.23.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:333) [AbstractChannelHandlerContext.class:4.0.23.Final]
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:319) [AbstractChannelHandlerContext.class:4.0.23.Final]
at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:787) [DefaultChannelPipeline.class:4.0.23.Final]
at io.netty.channel.embedded.EmbeddedChannel.writeInbound(EmbeddedChannel.java:169) [EmbeddedChannel.class:4.0.23.Final]
at net.minecraftforge.fml.common.network.internal.FMLProxyPacket.processPacket(FMLProxyPacket.java:90) [FMLProxyPacket.class:?]
at net.minecraft.network.NetworkManager.channelRead0(NetworkManager.java:158) [NetworkManager.class:?]
at net.minecraft.network.NetworkManager.channelRead0(NetworkManager.java:54) [NetworkManager.class:?]
at io.netty.channel.SimpleChannelInboundHandler.channelRead(SimpleChannelInboundHandler.java:105) [simpleChannelInboundHandler.class:4.0.23.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:333) [AbstractChannelHandlerContext.class:4.0.23.Final]
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:319) [AbstractChannelHandlerContext.class:4.0.23.Final]
at net.minecraftforge.fml.common.network.handshake.NetworkDispatcher.handleClientSideCustomPacket(NetworkDispatcher.java:389) [NetworkDispatcher.class:?]
at net.minecraftforge.fml.common.network.handshake.NetworkDispatcher.channelRead0(NetworkDispatcher.java:255) [NetworkDispatcher.class:?]
at net.minecraftforge.fml.common.network.handshake.NetworkDispatcher.channelRead0(NetworkDispatcher.java:53) [NetworkDispatcher.class:?]
at io.netty.channel.SimpleChannelInboundHandler.channelRead(SimpleChannelInboundHandler.java:105) [simpleChannelInboundHandler.class:4.0.23.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:333) [AbstractChannelHandlerContext.class:4.0.23.Final]
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:319) [AbstractChannelHandlerContext.class:4.0.23.Final]
at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:163) [byteToMessageDecoder.class:4.0.23.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:333) [AbstractChannelHandlerContext.class:4.0.23.Final]
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:319) [AbstractChannelHandlerContext.class:4.0.23.Final]
at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:163) [byteToMessageDecoder.class:4.0.23.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:333) [AbstractChannelHandlerContext.class:4.0.23.Final]
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:319) [AbstractChannelHandlerContext.class:4.0.23.Final]
at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:163) [byteToMessageDecoder.class:4.0.23.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:333) [AbstractChannelHandlerContext.class:4.0.23.Final]
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:319) [AbstractChannelHandlerContext.class:4.0.23.Final]
at io.netty.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:103) [MessageToMessageDecoder.class:4.0.23.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:333) [AbstractChannelHandlerContext.class:4.0.23.Final]
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:319) [AbstractChannelHandlerContext.class:4.0.23.Final]
at io.netty.handler.timeout.ReadTimeoutHandler.channelRead(ReadTimeoutHandler.java:150) [ReadTimeoutHandler.class:4.0.23.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:333) [AbstractChannelHandlerContext.class:4.0.23.Final]
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:319) [AbstractChannelHandlerContext.class:4.0.23.Final]
at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:787) [DefaultChannelPipeline.class:4.0.23.Final]
at io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:130) [AbstractNioByteChannel$NioByteUnsafe.class:4.0.23.Final]
at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:511) [NioEventLoop.class:4.0.23.Final]
at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:468) [NioEventLoop.class:4.0.23.Final]
at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:382) [NioEventLoop.class:4.0.23.Final]
at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:354) [NioEventLoop.class:4.0.23.Final]
at io.netty.util.concurrent.SingleThreadEventExecutor$2.run(SingleThreadEventExecutor.java:116) [singleThreadEventExecutor$2.class:4.0.23.Final]
at java.lang.Thread.run(Unknown Source) [?:1.7.0_79]

 

My code is below

import io.netty.buffer.ByteBuf;
import net.minecraft.client.Minecraft;
import net.minecraftforge.fml.common.network.ByteBufUtils;
import net.minecraftforge.fml.common.network.simpleimpl.IMessage;
import net.minecraftforge.fml.common.network.simpleimpl.IMessageHandler;
import net.minecraftforge.fml.common.network.simpleimpl.MessageContext;
import net.minecraftforge.fml.relauncher.Side;

public class MyMessage implements IMessage {
   
private String text;

    public MyMessage() { }

    public MyMessage(String text) {
        this.text = text;
    }

    @Override
    public void fromBytes(ByteBuf buf) {
        text = ByteBufUtils.readUTF8String(buf); // this class is very useful in general for writing more complex objects
    	
    }

    @Override
    public void toBytes(ByteBuf buf) {
        ByteBufUtils.writeUTF8String(buf, text);
    	
    }

    public static class Handler implements IMessageHandler<MyMessage, IMessage> {
        @Override
        public IMessage onMessage(final MyMessage message, final MessageContext ctx) {
            //IThreadListener mainThread = (WorldServer) ctx.getServerHandler().playerEntity.worldObj; // or Minecraft.getMinecraft() on the client
        	
        	if (ctx.side != Side.CLIENT) {
        	      System.err.println("TargetEffectMessageToClient received on wrong side:" + ctx.side);
        	      return null;
        	    }else{
        	    	System.out.println("MyMessage else triggered.................................................................");
        	    	Minecraft minecraft = Minecraft.getMinecraft();
        	minecraft.addScheduledTask(new Runnable() {
                @Override
                public void run() {
                	System.out.println("Run has been triggered.................................................................");
                	System.out.println(String.format("Received %s from %s", message.text, ctx.getServerHandler().playerEntity.getDisplayName()));
                }
            });
            return null; // no response in this case
        }}	
    }
}

 

PreInit

network = NetworkRegistry.INSTANCE.newSimpleChannel("JSCM|INIT");
    network.registerMessage(MyMessage.Handler.class, MyMessage.class, 0, Side.CLIENT);

 

Link to comment
Share on other sites

Forge packets start with discriminator (packet id). All packets sent from or received on spigot plugin must add that value on encoding/decoding.

Readup callbacks (when packet is sent).

1.7.10 is no longer supported by forge, you are on your own.

Link to comment
Share on other sites

Ok i messed up when trying to thank Ernio and diesieben07, and removed my previous post about the discriminator byte.

 

Anyways, i have got the code working by sending 50 characters to the Spigot plugin, then grabbing the discriminator, parse the message to send back to the client, then remove the length of the response from 50, adding extra 0's until the length is 50.

 

I then send the message to the client, with the discriminator, and the 50 character response, allowing me to remove the extra 0's, and then parse the message, for action by the mod.

 

After i clean up the code, i will post it here, for review, or help of others.

Link to comment
Share on other sites

  • 1 month later...

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Unfortunately, your content contains terms that we do not allow. Please edit your content to remove the highlighted words below.
Reply to this topic...

×   Pasted as rich text.   Restore formatting

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.



  • Recently Browsing

    • No registered users viewing this page.
  • Posts

    • java.lang.RuntimeException: Could not execute entrypoint stage 'main' due to errors, provided by 'terrablender'!     at net.fabricmc.loader.impl.FabricLoaderImpl.lambda$invokeEntrypoints$2(FabricLoaderImpl.java:388) ~[fabric-loader-0.15.11.jar:?]     at net.fabricmc.loader.impl.util.ExceptionUtil.gatherExceptions(ExceptionUtil.java:33) ~[fabric-loader-0.15.11.jar:?]     at net.fabricmc.loader.impl.FabricLoaderImpl.invokeEntrypoints(FabricLoaderImpl.java:386) ~[fabric-loader-0.15.11.jar:?]     at net.fabricmc.loader.impl.game.minecraft.Hooks.startServer(Hooks.java:63) ~[fabric-loader-0.15.11.jar:?]     at net.minecraft.server.Main.main(Main.java:112) ~[server-intermediary.jar:?]     at net.fabricmc.loader.impl.game.minecraft.MinecraftGameProvider.launch(MinecraftGameProvider.java:470) ~[fabric-loader-0.15.11.jar:?]     at net.fabricmc.loader.impl.launch.knot.Knot.launch(Knot.java:74) ~[fabric-loader-0.15.11.jar:?]     at net.fabricmc.loader.impl.launch.knot.KnotServer.main(KnotServer.java:23) ~[fabric-loader-0.15.11.jar:?]     at net.fabricmc.loader.impl.launch.server.FabricServerLauncher.main(FabricServerLauncher.java:69) ~[fabric-loader-0.15.11.jar:?] Caused by: java.lang.NoSuchFieldError: Class me.lortseam.completeconfig.data.BooleanEntry does not have member field 'boolean checkbox'     at me.lortseam.completeconfig.data.BooleanEntry.<init>(BooleanEntry.java:25) ~[completeconfig-base-2.5.0-cd5950f26b406f27.jar:?]     at me.lortseam.completeconfig.data.Entry.create(Entry.java:42) ~[completeconfig-base-2.5.0-cd5950f26b406f27.jar:?]     at me.lortseam.completeconfig.data.EntrySet.lambda$resolve$1(EntrySet.java:31) ~[completeconfig-base-2.5.0-cd5950f26b406f27.jar:?]     at java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:212) ~[?:?]     at java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:194) ~[?:?]     at java.util.Spliterators$ArraySpliterator.forEachRemaining(Spliterators.java:1024) ~[?:?]     at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:556) ~[?:?]     at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:546) ~[?:?]     at java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:151) ~[?:?]     at java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:174) ~[?:?]     at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:265) ~[?:?]     at java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:611) ~[?:?]     at me.lortseam.completeconfig.data.EntrySet.resolve(EntrySet.java:32) ~[completeconfig-base-2.5.0-cd5950f26b406f27.jar:?]     at me.lortseam.completeconfig.data.Parent.resolveContainer(Parent.java:58) ~[completeconfig-base-2.5.0-cd5950f26b406f27.jar:?]     at me.lortseam.completeconfig.data.Parent.resolve(Parent.java:110) ~[completeconfig-base-2.5.0-cd5950f26b406f27.jar:?]     at me.lortseam.completeconfig.data.Config.lambda$new$0(Config.java:51) ~[completeconfig-base-2.5.0-cd5950f26b406f27.jar:?]     at me.lortseam.completeconfig.data.Config.deserialize(Config.java:94) ~[completeconfig-base-2.5.0-cd5950f26b406f27.jar:?]     at me.lortseam.completeconfig.data.Config.load(Config.java:121) ~[completeconfig-base-2.5.0-cd5950f26b406f27.jar:?]     at io.github.uhq_games.regions_unexplored.RegionsUnexplored.onTerraBlenderInitialized(RegionsUnexplored.java:70) ~[RegionsUnexploredFabric-0.5.31.20.1.jar:?]     at terrablender.core.TerraBlenderFabric.lambda$onInitialize$0(TerraBlenderFabric.java:40) ~[TerraBlender-fabric-1.20.1-3.0.1.7.jar:?]     at java.util.ArrayList.forEach(ArrayList.java:1597) ~[?:?]     at terrablender.core.TerraBlenderFabric.onInitialize(TerraBlenderFabric.java:38) ~[TerraBlender-fabric-1.20.1-3.0.1.7.jar:?]     at net.fabricmc.loader.impl.FabricLoaderImpl.invokeEntrypoints(FabricLoaderImpl.java:384) ~[fabric-loader-0.15.11.jar:?]  
    • Hi, I have the oficial launcher using the version 1.21, and forge 51.0.13, as soon as I start the installation the games crashes and gives me "exit code: 1", I haven't put any mods yet in the folder. Its the second time that uninstall and install everything and nothing works, checket my graphics and they are updated. https://pastebin.com/STPgEiVs   thanks!
    • Ty very much it worked
    • no clue what is going on, you guys seem more knowledgeable than I am. So here's my log as well as my mod list. Error Folder On Google Drive  
  • Topics

  • Who's Online (See full list)

    • There are no registered users currently online
×
×
  • Create New...

Important Information

By using this site, you agree to our Terms of Use.