skx / cidr_match.js

A simple module to test whether a given IPv4 address is within a particular CIDR range.

cidr_match

This is a simple node.js module for determining whether an IPv4 address occurs within a given CIDR range.

Installation

You should be able to install this module by executing:

$ npm install cidr_match

Failing that you can clone the repository, and load the code via:

require( "./cidr_match" );

Examples

 //
 // Use the node.js assert module to validate our code.
 //
 var c      = require( "cidr_match" );
 var assert = require('assert');

 //
 // Does an IP come from within the given range?
 //
 assert(c.cidr_match ("10.0.0.24", "10.0.0.0/24" ) );
 assert(c.cidr_match ("10.0.0.240", "10.0.0.0/24" ) );
 assert(c.cidr_match ("10.0.0.240", "10.0/16" ) );

Notes

We only consider IPv4 addresses, by desgin.

This code was abstracted from the blogspam.js repository.

License

Please consider this licensed under the two-clause BSD license, included in the file LICENSE.

Steve