Tons of Solutions Engineering work done today for the rest of the CS team! Headway, Howard Hanna, Engels, Brighton, etc. Also completed Datasnippers auth flow and worked on Anthology's script. Cloned Anthology's courses (900..) and will clone Full Story on Monday.
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# IP
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[](https://www.npmjs.com/package/ip)
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IP address utilities for node.js
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## Installation
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### npm
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```shell
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npm install ip
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```
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### git
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```shell
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git clone https://github.com/indutny/node-ip.git
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```
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## Usage
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Get your ip address, compare ip addresses, validate ip addresses, etc.
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```js
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var ip = require('ip');
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ip.address() // my ip address
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ip.isEqual('::1', '::0:1'); // true
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ip.toBuffer('127.0.0.1') // Buffer([127, 0, 0, 1])
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ip.toString(new Buffer([127, 0, 0, 1])) // 127.0.0.1
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ip.fromPrefixLen(24) // 255.255.255.0
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ip.mask('192.168.1.134', '255.255.255.0') // 192.168.1.0
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ip.cidr('192.168.1.134/26') // 192.168.1.128
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ip.not('255.255.255.0') // 0.0.0.255
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ip.or('192.168.1.134', '0.0.0.255') // 192.168.1.255
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ip.isPrivate('127.0.0.1') // true
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ip.isV4Format('127.0.0.1'); // true
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ip.isV6Format('::ffff:127.0.0.1'); // true
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// operate on buffers in-place
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var buf = new Buffer(128);
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var offset = 64;
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ip.toBuffer('127.0.0.1', buf, offset); // [127, 0, 0, 1] at offset 64
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ip.toString(buf, offset, 4); // '127.0.0.1'
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// subnet information
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ip.subnet('192.168.1.134', '255.255.255.192')
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// { networkAddress: '192.168.1.128',
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// firstAddress: '192.168.1.129',
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// lastAddress: '192.168.1.190',
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// broadcastAddress: '192.168.1.191',
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// subnetMask: '255.255.255.192',
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// subnetMaskLength: 26,
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// numHosts: 62,
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// length: 64,
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// contains: function(addr){...} }
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ip.cidrSubnet('192.168.1.134/26')
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// Same as previous.
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// range checking
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ip.cidrSubnet('192.168.1.134/26').contains('192.168.1.190') // true
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// ipv4 long conversion
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ip.toLong('127.0.0.1'); // 2130706433
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ip.fromLong(2130706433); // '127.0.0.1'
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```
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### License
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This software is licensed under the MIT License.
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Copyright Fedor Indutny, 2012.
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Permission is hereby granted, free of charge, to any person obtaining a
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copy of this software and associated documentation files (the
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"Software"), to deal in the Software without restriction, including
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without limitation the rights to use, copy, modify, merge, publish,
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distribute, sublicense, and/or sell copies of the Software, and to permit
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persons to whom the Software is furnished to do so, subject to the
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following conditions:
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The above copyright notice and this permission notice shall be included
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in all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
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NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
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DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
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OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
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USE OR OTHER DEALINGS IN THE SOFTWARE.
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