Added new reserved IP check
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-40
@@ -76,46 +76,6 @@ export function gravatar(email: string, def='mp') {
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return `https://www.gravatar.com/avatar/${md5(email)}?d=${def}`;
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}
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/**
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* Check if IP address falls within CIDR range
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* @param {string} ip IPV4 to check (192.168.0.12)
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* @param {string} cidr IP range to check against (example: 192.168.0.0/24)
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* @returns {boolean} Whether IP address is within range
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*/
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export function matchesCidr(ip: string, cidr: string): boolean {
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if(!cidr) return true;
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if(!ip) return false;
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if(!cidr?.includes('/')) return ip === cidr; // Single IP
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const [range, bits] = cidr.split('/');
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const mask = ~(2 ** (32 - parseInt(bits)) - 1);
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const ipToInt = (str: string) => str.split('.')
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.reduce((int, octet) => (int << 8) + parseInt(octet), 0) >>> 0;
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return (ipToInt(ip) & mask) === (ipToInt(range) & mask);
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}
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/**
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* Convert IPv6 to v4 because who uses that, NAT4Life
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* @param {string} ip IPv6 address, e.g. 2001:0db8:85a3:0000:0000:8a2e:0370:7334
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* @returns {string | null} IPv4 address, e.g. 172.16.58.3
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*/
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export function ipV6ToV4(ip: string) {
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if(!ip) return null;
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const ipv4 = ip.split(':').splice(-1)[0];
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if(ipv4 == '1') return '127.0.0.1';
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return ipv4;
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}
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/**
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* Check if IP is reserved, e.g. localhost, private IPs, etc.
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* @param {string} ip
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* @returns {boolean}
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*/
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export function reservedIp(ip: string): boolean {
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if(ip == 'localhost' || ip == '127.0.0.1') return true;
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return /\b(10\.(?:[0-9]{1,3}\.){2}[0-9]{1,3})\b|\b(172\.(?:1[6-9]|2[0-9]|3[0-1])\.(?:[0-9]{1,3}\.)[0-9]{1,3})\b|\b(192\.168\.(?:[0-9]{1,3}\.)[0-9]{1,3})\b/.test(ip);
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}
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/**
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* Represents a function that listens for events and handles them accordingly.
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*
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