22 lines
534 B
JavaScript
22 lines
534 B
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{1,2}$/;
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export default function isIPRange(str) {
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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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return isIP(parts[0], 4) && parts[1] <= 32 && parts[1] >= 0;
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}
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