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    <p>One thing is sending data and the other thing is receiveing it. Since UDP protocol is bidirectional, then actually there is no strict difference between client and server. So your server and client code will be almost the same, the difference is that actually one will send packets and other will only respond. Also note that you have an infinite loop, because your probably using <code>.send</code> with <code>PORT</code> and <code>HOST</code> variables and you have to send to different host/port pair.</p> <p>Here's an example:</p> <p><strong>server</strong></p> <pre><code>var host = "127.0.0.1", port = 33333; var dgram = require( "dgram" ); var server = dgram.createSocket( "udp4" ); server.on( "message", function( msg, rinfo ) { console.log( rinfo.address + ':' + rinfo.port + ' - ' + msg ); server.send( msg, 0, msg.length, rinfo.port, rinfo.address ); // added missing bracket }); server.bind( port, host ); </code></pre> <p><strong>client</strong></p> <pre><code>// NOTE: the port is different var host = "127.0.0.1", port = 33334; var dgram = require( "dgram" ); var client = dgram.createSocket( "udp4" ); client.on( "message", function( msg, rinfo ) { console.log( "The packet came back" ); }); // client listens on a port as well in order to receive ping client.bind( port, host ); // proper message sending // NOTE: the host/port pair points at server var message = new Buffer( "My KungFu is Good!" ); client.send(message, 0, message.length, 33333, "127.0.0.1" ); </code></pre>
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    1. USfreakish
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    1. COThanks! That really helped. But I have another question. Let's say I want to send the packet in a specific number of bytes. I would replace 'message.length' with 1000 for 1kb right? But I get an error 'throw new Error('Offset + length beyond buffer length');' I don't quite understand why.
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      1. USCarlos Mendoza
    2. CObecause your buffer is 18 bytes long ("My KungFu is Good!".length, default codec is is ascii/binary byte per character). Create your message with `var message = new Buffer(1000);` to send 1000 bytes
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      1. USAndrey Sidorov
 

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