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@md-5
Created August 19, 2012 01:24
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Shows your Bukkit server to the LAN
package com.md_5;
import java.io.IOException;
import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.InetSocketAddress;
import java.util.logging.Level;
import org.bukkit.plugin.java.JavaPlugin;
public class LanBukkit extends JavaPlugin implements Runnable {
private DatagramSocket socket;
private InetSocketAddress broadcastAddr = new InetSocketAddress("224.0.2.60", 4445);
@Override
public void onEnable() {
try {
socket = new DatagramSocket();
getServer().getScheduler().scheduleAsyncRepeatingTask(this, this, 0, 30);
} catch (IOException ex) {
getLogger().severe("Could not start LAN server broadcaster");
}
}
@Override
public void onDisable() {
if (socket != null) {
socket.close();
}
getServer().getScheduler().cancelTasks(this);
}
public void run() {
try {
byte[] broadcast = ("[MOTD]" + getServer().getMotd() + "[/MOTD][AD]" + getServer().getIp() + ":" + getServer().getPort() + "[/AD]").getBytes();
socket.send(new DatagramPacket(broadcast, broadcast.length, broadcastAddr));
} catch (IOException ex) {
getLogger().log(Level.SEVERE, "Caught exception, shutting down", ex);
}
}
}
@w1553
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w1553 commented Sep 17, 2012

where do you put this?

@zhuowei
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zhuowei commented Oct 18, 2012

getServer().getIp() only gets the bound IP specified in server.properties; would be nice if this automagically detected your local IP.

@md-5
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md-5 commented Oct 27, 2012

Thanks for letting me know, I will add that, gist doesnt seem to give me alerts.

@md-5
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md-5 commented Oct 27, 2012

Try: byte[] broadcast = ("[MOTD]" + getServer().getMotd() + "[/MOTD][AD]" + InetAddress.getLocalHost() + ":" + getServer().getPort() + "[/AD]").getBytes();

@zhuowei
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zhuowei commented Oct 27, 2012

That's what Minecraft itself uses pretty much and what I use in my slightly modified version, but thanks again.

@Tsaukpaetra
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For certain linux machines, InetAddress.getLocalHost() does not work and generates an error. For my implementation, I just put a question mark (or other invalid host name), and it works correctly to get the IP address.
Also, line 13 should have a broadcast IP address, I just use 255.255.255.255 for simplicity (for some reason I was unable to get broadcasts without it...).
Other than that, it seems to work flawlessly!

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