30 lines
639 B
TypeScript
30 lines
639 B
TypeScript
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import { lookup } from 'dns'
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import { parse as parseIP } from 'ipaddr.js'
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function dnsLookupAll (hostname: string) {
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return new Promise<string[]>((res, rej) => {
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lookup(hostname, { family: 0, all: true }, (err, adresses) => {
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if (err) return rej(err)
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return res(adresses.map(a => a.address))
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})
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})
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}
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async function isResolvingToUnicastOnly (hostname: string) {
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const addresses = await dnsLookupAll(hostname)
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for (const address of addresses) {
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const parsed = parseIP(address)
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if (parsed.range() !== 'unicast') return false
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}
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return true
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}
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export {
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dnsLookupAll,
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isResolvingToUnicastOnly
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}
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