20 lines
628 B
TypeScript
20 lines
628 B
TypeScript
/*
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* SPDX-FileCopyrightText: syuilo and misskey-project
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* SPDX-License-Identifier: AGPL-3.0-only
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*/
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import IPCIDR from 'ip-cidr';
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export function getIpHash(ip: string): string {
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try {
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// because a single person may control many IPv6 addresses,
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// only a /64 subnet prefix of any IP will be taken into account.
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// (this means for IPv4 the entire address is used)
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const prefix = IPCIDR.createAddress(ip).mask(64);
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return 'ip-' + BigInt('0b' + prefix).toString(36);
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} catch (e) {
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const prefix = IPCIDR.createAddress(ip.replace(/:[0-9]+$/, '')).mask(64);
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return 'ip-' + BigInt('0b' + prefix).toString(36);
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}
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}
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