addrs

About

addrs is a package which makes it easier to interact with and manipulate IP addresses and networks. It's heavily inspired by the popular netaddr library for Python. For now the package only supports IPv4 networks, with IPv6 planned to be implemented.

Features

• Get information about an IP network, first and last host, broadcast address, network address
• Check if two IP networks overlap
• Split an IP network in to multiple networks of a specified prefix length
• Get a list of hosts within an IP network

Planned features

• IPv6 support
• Ability to "summerize" a list of networks
• Some tests... :)

Getting started

Installation

npm install addrs

Usage and examples

Import the package:

const addrs = require("addrs");

Creating an IPv4 network

> const netwrk = addrs.Ipv4Network.fromCidr("10.47.0.0/16");
> console.log(netwrk.toString());
10.47.0.0/16

Splitting an IPv4 network

> const netwrk = addrs.Ipv4Network.fromCidr("10.47.0.0/16");
> const splitted = netwrk.split(18);
> console.log(splitted.join(","));
10.47.0.0/18,10.47.64.0/18,10.47.128.0/18,10.47.192.0/18

Checking if networks overlap

> const netwrk = addrs.Ipv4Network.fromCidr("10.47.0.0/16");
> const netwrk2 = addrs.Ipv4Network.fromCidr("10.47.64.0/18");
> const netwrk3 = addrs.Ipv4Network.fromCidr("192.168.1.0/24");
> console.log(netwrk.overlaps(netwrk2));
> console.log(netwrk.overlaps(netwrk3));
true
false