37 lines
2.1 KiB
JavaScript
37 lines
2.1 KiB
JavaScript
'use strict';
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const word = '[a-fA-F\\d:]';
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const b = options => options && options.includeBoundaries ?
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`(?:(?<=\\s|^)(?=${word})|(?<=${word})(?=\\s|$))` :
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'';
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const v4 = '(?:25[0-5]|2[0-4]\\d|1\\d\\d|[1-9]\\d|\\d)(?:\\.(?:25[0-5]|2[0-4]\\d|1\\d\\d|[1-9]\\d|\\d)){3}';
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const v6seg = '[a-fA-F\\d]{1,4}';
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const v6 = `
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(?:
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(?:${v6seg}:){7}(?:${v6seg}|:)| // 1:2:3:4:5:6:7:: 1:2:3:4:5:6:7:8
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(?:${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
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(?:${v6seg}:){5}(?::${v4}|(?::${v6seg}){1,2}|:)| // 1:2:3:4:5:: 1:2:3:4:5::7:8 1:2:3:4:5::8 1:2:3:4:5::7:1.2.3.4
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(?:${v6seg}:){4}(?:(?::${v6seg}){0,1}:${v4}|(?::${v6seg}){1,3}|:)| // 1:2:3:4:: 1:2:3:4::6:7:8 1:2:3:4::8 1:2:3:4::6:7:1.2.3.4
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(?:${v6seg}:){3}(?:(?::${v6seg}){0,2}:${v4}|(?::${v6seg}){1,4}|:)| // 1:2:3:: 1:2:3::5:6:7:8 1:2:3::8 1:2:3::5:6:7:1.2.3.4
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(?:${v6seg}:){2}(?:(?::${v6seg}){0,3}:${v4}|(?::${v6seg}){1,5}|:)| // 1:2:: 1:2::4:5:6:7:8 1:2::8 1:2::4:5:6:7:1.2.3.4
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(?:${v6seg}:){1}(?:(?::${v6seg}){0,4}:${v4}|(?::${v6seg}){1,6}|:)| // 1:: 1::3:4:5:6:7:8 1::8 1::3:4:5:6:7:1.2.3.4
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(?::(?:(?::${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
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)(?:%[0-9a-zA-Z]{1,})? // %eth0 %1
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`.replace(/\s*\/\/.*$/gm, '').replace(/\n/g, '').trim();
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// Pre-compile only the exact regexes because adding a global flag make regexes stateful
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const v46Exact = new RegExp(`(?:^${v4}$)|(?:^${v6}$)`);
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const v4exact = new RegExp(`^${v4}$`);
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const v6exact = new RegExp(`^${v6}$`);
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const ip = options => options && options.exact ?
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v46Exact :
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new RegExp(`(?:${b(options)}${v4}${b(options)})|(?:${b(options)}${v6}${b(options)})`, 'g');
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ip.v4 = options => options && options.exact ? v4exact : new RegExp(`${b(options)}${v4}${b(options)}`, 'g');
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ip.v6 = options => options && options.exact ? v6exact : new RegExp(`${b(options)}${v6}${b(options)}`, 'g');
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module.exports = ip;
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