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Viewing file:     index.js (2.12 KB)      -rw-r--r--

'use strict';

const word = '[a-fA-F\\d:]';
const b = options => options && options.includeBoundaries ?
	`(?:(?<=\\s|^)(?=${word})|(?<=${word})(?=\\s|$))` :
	'';

const v4 = '(?:25[0-5]|2[0-4]\\d|1\\d\\d|[1-9]\\d|\\d)(?:\\.(?:25[0-5]|2[0-4]\\d|1\\d\\d|[1-9]\\d|\\d)){3}';

const v6seg = '[a-fA-F\\d]{1,4}';
const v6 = `
(?:
(?:${v6seg}:){7}(?:${v6seg}|:)|                                    // 1:2:3:4:5:6:7::  1:2:3:4:5:6:7:8
(?:${v6seg}:){6}(?:${v4}|:${v6seg}|:)|                             // 1:2:3:4:5:6::    1:2:3:4:5:6::8   1:2:3:4:5:6::8  1:2:3:4:5:6::1.2.3.4
(?:${v6seg}:){5}(?::${v4}|(?::${v6seg}){1,2}|:)|                   // 1:2:3:4:5::      1:2:3:4:5::7:8   1:2:3:4:5::8    1:2:3:4:5::7:1.2.3.4
(?:${v6seg}:){4}(?:(?::${v6seg}){0,1}:${v4}|(?::${v6seg}){1,3}|:)| // 1:2:3:4::        1:2:3:4::6:7:8   1:2:3:4::8      1:2:3:4::6:7:1.2.3.4
(?:${v6seg}:){3}(?:(?::${v6seg}){0,2}:${v4}|(?::${v6seg}){1,4}|:)| // 1:2:3::          1:2:3::5:6:7:8   1:2:3::8        1:2:3::5:6:7:1.2.3.4
(?:${v6seg}:){2}(?:(?::${v6seg}){0,3}:${v4}|(?::${v6seg}){1,5}|:)| // 1:2::            1:2::4:5:6:7:8   1:2::8          1:2::4:5:6:7:1.2.3.4
(?:${v6seg}:){1}(?:(?::${v6seg}){0,4}:${v4}|(?::${v6seg}){1,6}|:)| // 1::              1::3:4:5:6:7:8   1::8            1::3:4:5:6:7:1.2.3.4
(?::(?:(?::${v6seg}){0,5}:${v4}|(?::${v6seg}){1,7}|:))             // ::2:3:4:5:6:7:8  ::2:3:4:5:6:7:8  ::8             ::1.2.3.4
)(?:%[0-9a-zA-Z]{1,})?                                             // %eth0            %1
`.replace(/\s*\/\/.*$/gm, '').replace(/\n/g, '').trim();

// Pre-compile only the exact regexes because adding a global flag make regexes stateful
const v46Exact = new RegExp(`(?:^${v4}$)|(?:^${v6}$)`);
const v4exact = new RegExp(`^${v4}$`);
const v6exact = new RegExp(`^${v6}$`);

const ip = options => options && options.exact ?
	v46Exact :
	new RegExp(`(?:${b(options)}${v4}${b(options)})|(?:${b(options)}${v6}${b(options)})`, 'g');

ip.v4 = options => options && options.exact ? v4exact : new RegExp(`${b(options)}${v4}${b(options)}`, 'g');
ip.v6 = options => options && options.exact ? v6exact : new RegExp(`${b(options)}${v6}${b(options)}`, 'g');

module.exports = ip;