ipop

IP subnet calculator. One can also use it to check if IP is in subnet.

Install

npm install ipop

Usage

$3

``javascript
var ipop = require('ipop');

// check if IP in subnet
console.log(ipop.ip4incidr('192.168.1.15', '192.168.0.1/24'));
console.log(ipop.ip4incidr('192.168.1.15', '192.168.0.1/16'));
console.log(ipop.ip4incidr('192.168.1.15', '192.168.1.15/32'));

// show subnet info
console.log(ipop.cidr4('87.239.88.1/22'));
`

Output:

`javascript
false
true
true
{ net: '87.239.88.0',
netmask: '255.255.252.0',
broadcast: '87.239.91.255',
low: '87.239.88.1',
high: '87.239.91.254',
hosts: 1022 }
`

Documentation

$3

check if ip is in given cidr. Returns boolean. cidr has to be in format X.X.X.X/X.

$3

cidr4 returns object with info about given cidr:

- net: network address
- netmask: network mask
- broadcast: broadcast address
- low: first usable host address
- high: last usable host address
- hosts`: number of usable hosts