Example method for implementing UDP multicast in nodejs

As we all know, UDP data transmission methods include unicast, multicast, and broadcast.

Among them, unicast mode is the most commonly used, so I won’t talk about it here, you can search it online.

The following example mainly implements a simple UDP multicast method. UDP data can be sent and received normally.

Server side code

const dgram = require('dgram');
const server = ('udp4');

// const local_ip = "192.168.";
const multicast_ip = "225.0.0.100"; // This must be a multicast address (class D IP address)
('close', ()=&gt;{
  ('close socket');
});

('listening', ()=&gt;{
  ('listening...');
  (true);
  (128);
  (multicast_ip);

  setInterval(()=&gt;{
    send_msg();
  }, 2000);
});

('message', (msg, rinfo)=&gt;{
  (`receive client message from ${}: ${}: ${msg}`);
});

(); // Randomly bind a port of the machine
function send_msg(){
  ('send msg');
  ('hi, im server...', '8062', multicast_ip);
}

Client side code:

const dgram = require('dgram');
var client = ('udp4');

// const local_ip = '192.168.';
const multicast_ip = "225.0.0.100";  // This must be a multicast address (class D IP address)
('close', ()=&gt;{
  ('client closed');
});

('error', (err) =&gt;{
  ('client error' + err);
});

('listening', ()=&gt;{
  ('client listening...');
  (true);
  (128);
  (multicast_ip);
});

('message', (msg, rinfo) =&gt; {
  (`receive server message from ${}: ${}: ${msg}`);
});
('8062'); // Port that monitors multicast data

refer to:

https:///article/
/questions/14130560/nodejs-udp-multicast-how-to

The above is all the content of this article. I hope it will be helpful to everyone's study and I hope everyone will support me more.