Nodejs实现的一个简单udp广播服务器、客户端

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

server.bind(41234);

var socket = dgram.createSocket("udp4");
socket.bind(function () {
  socket.setBroadcast(true);
});

var message = new Buffer("Hi");
socket.send(message, 0, message.length, 41234, '255.255.255.255', function(err, bytes) {
  socket.close();
});