broadcast.js

process.argv.forEach(function (val, index, array) {
  console.log(index + ': ' + val);
});
if(process.argv[2] == 'server'){

var dgram = require("dgram");

 var server = dgram.createSocket("udp4");

 server.on("message", function (msg, rinfo) {
   console.log("server got: " + msg + " from " +
     rinfo.address + ":" + rinfo.port);
 });

 server.on("listening", function () {
   var address = server.address();
   console.log("server listening " + address.address + ":" + address.port);
 });

 server.bind(66699);

} else {


var sys = require('util');
var net = require('net');

var dgram = require('dgram');
var message = new Buffer('message');
var client = dgram.createSocket("udp4");

client.bind(function () {client.setBroadcast(true);});
client.send(message, 0, message.length, 66699, "10.28.27.255", function(err, bytes) {
    client.close();
});
}