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							- # IP  
 
- [](https://www.npmjs.com/package/ip)  
 
- IP address utilities for node.js
 
- ## Installation
 
- ###  npm
 
- ```shell
 
- npm install ip
 
- ```
 
- ### git
 
- ```shell
 
- git clone https://github.com/indutny/node-ip.git
 
- ```
 
-   
 
- ## Usage
 
- Get your ip address, compare ip addresses, validate ip addresses, etc.
 
- ```js
 
- 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
 
- ip.isV4Format('127.0.0.1'); // true
 
- ip.isV6Format('::ffff: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,
 
- //   contains: function(addr){...} }
 
- ip.cidrSubnet('192.168.1.134/26')
 
- // Same as previous.
 
- // range checking
 
- ip.cidrSubnet('192.168.1.134/26').contains('192.168.1.190') // true
 
- // 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.
 
 
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