Node.js socket.address() Method

The socket.address() method is an inbuilt application programming interface of class Socket within dgram module which is used to get the object which contains the address information for the socket.

Syntax:

const socket.address()

Parameters: This method does not accept any parameter.

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

Example 1: In this example, we will see the use of a socket.address() Method

Filename: index.js

Javascript

// Node.js program to demonstrate the
// server.address() method

// Importing dgram module
const dgram = require('dgram');

// Creating and initializing client
// and server socket
let client = dgram.createSocket("udp4");
let 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();
}).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");

Output:

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

Example 2: In this example, we will see the use of a socket.address() Method

Filename: index.js

Javascript

// Node.js program to demonstrate the
// server.address() method

// Importing dgram module
const dgram = require('dgram');

// Creating and initializing client
// and server socket
let client = dgram.createSocket("udp4");
let 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
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");

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_address