NodeJS UDP/IPv6 simple send message example

udp_send.js

//var HOST = 'ip6-localhost';
var HOST = 'fdd5::1';

var REMOTE_PORT = 4000;
var LOCAL_PORT  = 4001;

var dgram = require('dgram');

var message = new Buffer('(data)');

var client = dgram.createSocket('udp6');
client.bind(LOCAL_PORT);

client.send(message, 0, message.length, REMOTE_PORT, HOST,
  function(error, bytes) { 
    if (error) throw error;
    console.log('Message sent to host: "' + HOST + '", port: ' + REMOTE_PORT);
    client.close();
  } 
);