mirror of
https://github.com/30hours/blah2.git
synced 2024-09-19 11:48:31 +00:00
18 lines
519 B
JavaScript
18 lines
519 B
JavaScript
function is_localhost(ip) {
|
|
|
|
if (ip === 'localhost') {
|
|
return true;
|
|
}
|
|
|
|
const localRanges = ['127.0.0.1', '192.168.0.0/16', '10.0.0.0/8', '172.16.0.0/12'];
|
|
|
|
const ipToInt = ip => ip.split('.').reduce((acc, octet) => (acc << 8) + +octet, 0) >>> 0;
|
|
|
|
return localRanges.some(range => {
|
|
const [rangeStart, rangeSize = 32] = range.split('/');
|
|
const start = ipToInt(rangeStart);
|
|
const end = (start | (1 << (32 - +rangeSize))) >>> 0;
|
|
return ipToInt(ip) >= start && ipToInt(ip) <= end;
|
|
});
|
|
|
|
} |