Node.js net.SocketAddress() Method

Node.js Net module allows you to create TCP or IPC servers and clients. A TCP client initiates a connection request to a TCP server to establish a connection with the server.

Syntax: Below is the syntax for importing the Net module into your node js project:

const <Variable_Name> = require('node:net');
const Net_Module = require('node:net');

The net.SocketAddress() class provides us with the detailed address of the socket of the network. See the below syntax for calling the SocketAddress() constructor of the class:

Syntax:

const socket = new Net_Module.SocketAddress([options]);

Parameters:

• Options: It consists of the IP address, port, family, and flow label values. It is <object> type, and optional.

Return Value:

• socket.address: <string>  Returns the IP address.
• socket.family:  <string> Returns the family of IP address – ipv4/ipv6.
• socket.flowlabel :  <number> Returns a number that is an ipv6 flow label.
• socket.port: <number> Returns the port number.

Steps to create Node.js Project:

Step 1: Run the following command in your terminal to set up your Node.js project package.json:

npm init

Step 2: Create an app.js file that describes the code.

Step 3: Now import the net module into your project. and start writing your code.

In case the net module is not installed in your system, you may use the below command to install the net module into the project:

npm i net

Example 1: Let’s create an object of the net.SocketAddress() class and print the object.

Javascript

// Program to create an object of SocketAddress class

// Importing the Net Module into project.
const Net_Module = require('node:net');

// Creating an object by calling the constructor
// of the class
const object = new Net_Module.SocketAddress();

// Printing the object
console.log(object);

Output:

SocketAddress { 
    address: '127.0.0.1', 
    port: 0, 
    family: 'ipv4', 
    flowlabel: 0 
}

As you can see from the output, the object of the class consists of four properties and returns the default values for each of the properties. 

Example 2: We are creating a custom option object and passing it to this constructor to know whether it changes the default values for all the properties or not.

Javascript

// Program to create an object of SocketAddress class

// Importing the Net Module into project.
const Net_Module = require('node:net');

// Custom options object
const options = {
    address:'142.38.75.36',
    family:'ipv4',
    port:200
};

// Creating the object by calling the constructor
// of the class and passing the custom options
// object to it
const object = new Net_Module.SocketAddress(options);

// Printing the object.
console.log(object);

Output:

SocketAddress { 
    address: '142.38.75.36', 
    port: 200, 
    family: 'ipv4', 
    flowlabel: 0 
}

We have used a random IP and Port number and generated the Socket address for this Ip address.

Reference: https://nodejs.org/api/net.html#class-netsocketaddress