ip

What is ip?

The 'ip' npm package is a utility module for IP address manipulation. It provides functions for various IP address-related operations such as formatting, parsing, subnetting, and CIDR manipulation.

What are ip's main functionalities?

IP address conversion and formatting

Converts IP addresses to buffer objects and back to string representation.

const ip = require('ip');
console.log(ip.toBuffer('127.0.0.1'));
console.log(ip.toString(ip.toBuffer('::1')));

Subnet information

Provides information about the subnet, such as network address, subnet mask, and broadcast address.

const ip = require('ip');
console.log(ip.subnet('192.168.1.134', '255.255.255.0'));

CIDR manipulation

Provides information about the CIDR range, including network address and subnet mask.

const ip = require('ip');
console.log(ip.cidrSubnet('192.168.1.134/26'));

IP address comparison

Compares IP addresses to check for equality and checks if an IP address is within a private range.

const ip = require('ip');
console.log(ip.isEqual('::1', '::0:1'));
console.log(ip.isPrivate('192.168.1.134'));

Other packages similar to ip

netmask

The 'netmask' package parses and manipulates network ranges in CIDR notation. It provides similar subnetting and CIDR manipulation features but with a focus on network masks.

cidr-regex

The 'cidr-regex' package offers regular expressions to match CIDR IP addresses. It is more specialized than 'ip' and is used primarily for validation rather than manipulation.

ip6

The 'ip6' package is specifically designed for manipulating IPv6 addresses. It offers functionality similar to 'ip' but is tailored for the IPv6 protocol.

ip-address

The 'ip-address' package provides classes for working with IPv4 and IPv6 addresses, including parsing, validation, and subnet calculations. It offers a more object-oriented approach compared to 'ip'.

README

IP

IP address utilities for node.js

Usage

Get your ip address, compare ip addresses, validate ip addresses, etc.

var ip = require('ip');

ip.address() // my ip address
ip.isEqual('::1', '::0:1'); // true
ip.toBuffer('127.0.0.1') // Buffer([127, 0, 0, 1])
ip.toString(new Buffer([127, 0, 0, 1])) // 127.0.0.1
ip.fromPrefixLen(24) // 255.255.255.0
ip.mask('192.168.1.134', '255.255.255.0') // 192.168.1.0
ip.cidr('192.168.1.134/26') // 192.168.1.128
ip.not('255.255.255.0') // 0.0.0.255
ip.or('192.168.1.134', '0.0.0.255') // 192.168.1.255
ip.isPrivate('127.0.0.1') // true

// operate on buffers in-place
var buf = new Buffer(128);
var offset = 64;
ip.toBuffer('127.0.0.1', buf, offset);  // [127, 0, 0, 1] at offset 64
ip.toString(buf, offset, 4);            // '127.0.0.1'

// subnet information
ip.subnet('192.168.1.134', '255.255.255.192')
// { networkAddress: '192.168.1.128',
//   firstAddress: '192.168.1.129',
//   lastAddress: '192.168.1.190',
//   broadcastAddress: '192.168.1.191',
//   subnetMask: '255.255.255.192',
//   subnetMaskLength: 26,
//   numHosts: 62,
//   length: 64 }
ip.cidrSubnet('192.168.1.134/26')
// Same as previous.

// ipv4 long conversion
ip.toLong('127.0.0.1'); // 2130706433
ip.fromLong(2130706433); // '127.0.0.1'

License

This software is licensed under the MIT License.

Copyright Fedor Indutny, 2012.

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.