47 lines
1.0 KiB
JavaScript
47 lines
1.0 KiB
JavaScript
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import assertString from './util/assertString';
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import isIP from './isIP';
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var subnetMaybe = /^\d{1,3}$/;
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var v4Subnet = 32;
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var v6Subnet = 128;
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export default function isIPRange(str) {
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var version = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : '';
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assertString(str);
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var parts = str.split('/'); // parts[0] -> ip, parts[1] -> subnet
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if (parts.length !== 2) {
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return false;
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}
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if (!subnetMaybe.test(parts[1])) {
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return false;
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} // Disallow preceding 0 i.e. 01, 02, ...
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if (parts[1].length > 1 && parts[1].startsWith('0')) {
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return false;
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}
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var isValidIP = isIP(parts[0], version);
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if (!isValidIP) {
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return false;
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} // Define valid subnet according to IP's version
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var expectedSubnet = null;
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switch (String(version)) {
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case '4':
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expectedSubnet = v4Subnet;
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break;
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case '6':
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expectedSubnet = v6Subnet;
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break;
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default:
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expectedSubnet = isIP(parts[0], '6') ? v6Subnet : v4Subnet;
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}
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return parts[1] <= expectedSubnet && parts[1] >= 0;
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}
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