Node.js socket.bind() Method - GeeksforGeeks

02 Jul, 2021
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: addressexclusive: Boolean value true or false.fd: Integer value.
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
// Node.js program to demonstrate the// server.bind() method // Importing dgram modulevar dgram = require('dgram'); // Creating and initializing client// and server socketvar client = dgram.createSocket("udp4");var server = dgram.createSocket("udp4"); // Catching the message eventserver.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 serverclient.send("Hello", 0, 7, 1234, "localhost");
Output:
{ address: '0.0.0.0', family: 'IPv4', port: 1234 }
UDP String: Hello
Example 2: Filename: index.js
Javascript
// Node.js program to demonstrate the// server.bind() method // Importing dgram modulevar dgram = require('dgram'); // Creating and initializing client// and server socketvar client = dgram.createSocket("udp4");var server = dgram.createSocket("udp4"); // Catching the message eventserver.on("message", function (msg) {     // Displaying the client message    process.stdout.write("UDP String: " + msg + "\n");     // Exiting process    process.exit(); }); // Catching the listening eventserver.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() methodserver.bind(1234, () => {     // Adding a multicast address for others to join    server.addMembership('224.0.0.114');}); // Client sending message to serverclient.send("Hello", 0, 7, 1234, "localhost");
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
sagartomar9927
Node.js-Methods
Node.js
Web Technologies
Writing code in comment?
Please use ide.geeksforgeeks.org,
generate link and share the link here.
How to update Node.js and NPM to next version ?
Node.js fs.readFileSync() Method
Node.js fs.writeFile() Method
How to update NPM ?
Difference between promise and async await in Node.js
Remove elements from a JavaScript Array
Convert a string to an integer in JavaScript
How to fetch data from an API in ReactJS ?
How to insert spaces/tabs in text using HTML/CSS?
Difference between var, let and const keywords in JavaScript