Node.js socket.bind() Method

The socket.bind() method is an inbuilt application programming interface of class Socket within dgram module which is used to bind the particular data gram server to a particular port with some required information.

Syntax:

const socket.bind(options[, callback])

Parameters: This method takes the following parameter:

  • option: It can use the following parameters-
    • port: port value.
    • address: address
    • exclusive: Boolean value true or false.
    • fd: Integer value.
  • callback: Callback function for further operation.

Return Value: This method returns the object which contains the address information for the socket.

Example 1: Filename: index.js



Javascript

filter_none

edit
close

play_arrow

link
brightness_4
code

// Node.js program to demonstrate the
// server.bind() method
  
// Importing dgram module
var dgram = require('dgram');
  
// Creating and initializing clinet
// and server socket
var client = dgram.createSocket("udp4");
var server = dgram.createSocket("udp4");
  
// Catching the message event
server.on("message", function (msg) {
  
    // Displaying the client message
    process.stdout.write("UDP String: " + msg + "\n");
  
    // Exiting process
    process.exit();
})
    // Binding server with port
    .bind(1234, () => {
  
        // Getting the address information
        // for the server by using 
        // address() method
        const address = server.address()
  
        // Display the result
        console.log(address);
  
    });
  
// Client sending message to server
client.send("Hello", 0, 7, 1234, "localhost");

chevron_right


Output:

{ address: '0.0.0.0', family: 'IPv4', port: 1234 }
UDP String: Hello

Example 2: Filename: index.js

Javascript

filter_none

edit
close

play_arrow

link
brightness_4
code

// Node.js program to demonstrate the
// server.bind() method
  
// Importing dgram module
var dgram = require('dgram');
  
// Creating and initializing clinet
// and server socket
var client = dgram.createSocket("udp4");
var server = dgram.createSocket("udp4");
  
// Catching the message event
server.on("message", function (msg) {
  
    // Displaying the client message
    process.stdout.write("UDP String: " + msg + "\n");
  
    // Exiting process
    process.exit();
  
});
  
// Catching the listening event
server.on('listening', () => {
  
    // Getting address information for the server
    const address = server.address();
  
    // Display the result
    console.log(`server listening 
        ${address.address}:${address.port}`);
});
  
// Binding server with port address
// by using bind() method
server.bind(1234, () => {
  
    // Adding a multicast address for others to join
    server.addMembership('224.0.0.114');
});
  
// Client sending message to server
client.send("Hello", 0, 7, 1234, "localhost");

chevron_right


Output:

server listening 0.0.0.0:1234
UDP String: Hello

Run the index.js file using the following command:

node index.js

Reference:https://nodejs.org/dist/latest-v12.x/docs/api/dgram.html#dgram_socket_bind_options_callback




My Personal Notes arrow_drop_up

Check out this Author's contributed articles.

If you like GeeksforGeeks and would like to contribute, you can also write an article using contribute.geeksforgeeks.org or mail your article to contribute@geeksforgeeks.org. See your article appearing on the GeeksforGeeks main page and help other Geeks.

Please Improve this article if you find anything incorrect by clicking on the "Improve Article" button below.


Article Tags :

Be the First to upvote.


Please write to us at contribute@geeksforgeeks.org to report any issue with the above content.