NODEJS's socket broadcast

Nodejs send UDP broadcast is quite simple, we first write a server to receive broadcast data, the code is as follows:

varDgram = require ("Dgram");varServer = Dgram.createsocket ("UDP4"); Server.on ("Error",function(Err) {Console.log ("Server error:\n" +err.stack); Server.close ();}); Server.on ("Message",function(msg, rinfo) {Console.log ("Server Got:" + msg + "from" +rinfo.address+ ":" +rinfo.port);}); Server.on ("Listening",function () {  varAddress =server.address (); Console.log ("Server Listening" +address.address+ ":" +address.port);}); Server.bind (41234);

Then write a client program, send a broadcast message, the code is as follows:

var dgram = require ("Dgram"); var socket = Dgram.createsocket ("UDP4"); Socket.bind (function  () {  Socket.setbroadcast (true);}); var New Buffer ("Hi"function(err, bytes) {  socket.close ();});

It is important to note that Socket.setbroadcast (true) must not be called until the socket is successfully bound, otherwise it will be reported error:setbroadcast EBADF error.

It is quite simple for the client to send the broadcast, and it is OK to set up the data and ports that need to be sent.