JavaScript inet_pton
Converts a human readable IP address to a packed binary string
1 2 3 4 56 7 8 9 1011 12 13 14 1516 17 18 19 2021 22 23 24 2526 27 28 29 3031 32 33 34 3536 37 38 39 4041 42 43 44 4546 47 | function inet_pton (a) { // Converts a human readable IP address to a packed binary string // // version: 1109.2015 // discuss at: http://phpjs.org/functions/inet_pton // + original by: Theriault // * example 1: inet_pton('::'); // * returns 1: '\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0' (binary) // * example 2: inet_pton('127.0.0.1'); // * returns 2: '\x7F\x00\x00\x01' (binary) var r, m, x, i, j, f = String.fromCharCode; m = a.match(/^(?:\d{1,3}(?:\.|$)){4}/); // IPv4 if (m) { m = m[0].split('.'); m = f(m[0]) + f(m[1]) + f(m[2]) + f(m[3]); // Return if 4 bytes, otherwise false. return m.length === 4 ? m : false; } r = /^((?:[\da-f]{1,4}(?::|)){0,8})(::)?((?:[\da-f]{1,4}(?::|)){0,8})$/; m = a.match(r); // IPv6 if (m) { // Translate each hexadecimal value. for (j = 1; j < 4; j++) { // Indice 2 is :: and if no length, continue. if (j === 2 || m[j].length === 0) { continue; } m[j] = m[j].split(':'); for (i = 0; i < m[j].length; i++) { m[j][i] = parseInt(m[j][i], 16); // Would be NaN if it was blank, return false. if (isNaN(m[j][i])) { return false; // Invalid IP. } m[j][i] = f(m[j][i] >> 8) + f(m[j][i] & 0xFF); } m[j] = m[j].join(''); } x = m[1].length + m[3].length; if (x === 16) { return m[1] + m[3]; } else if (x < 16 && m[2].length > 0) { return m[1] + (new Array(16 - x + 1)).join('\x00') + m[3]; } } return false; // Invalid IP. } |
Examples
» Example 1
Running
1 | inet_pton('::'); |
Should return
1 | '\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0' (binary) |
» Example 2
Running
1 | inet_pton('127.0.0.1'); |
Should return
1 | '\x7F\x00\x00\x01' (binary) |
Dependencies
No dependencies, you can use this function standalone.
Open syntax issues
php.js uses JsLint to help us keep our code consistent and prevent some common bugs.
Eventually we want all code to pass or at least take into consideration most fixes suggested by JsLint, following this JsLint configuration we’ve decided on.
Authors
Thanks to the following developers, you get to have inet_pton goodness in JavaScript.
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