mirror of https://codeberg.org/pzp/pzp-net.git
100 lines
3.1 KiB
JavaScript
100 lines
3.1 KiB
JavaScript
const IP = require('ip')
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const Multiaddr = {
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/**
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* Converts (legacy) [multiserver](https://github.com/ssbc/multiserver-address)
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* addresses to [multiaddr](https://multiformats.io/multiaddr/) (modern).
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* @param {string} msaddr
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* @returns {`/${string}`}
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*/
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fromMs(msaddr) {
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const [msTransport, msTransform] = msaddr.split('~')
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const [label1, ...pieces] = msTransport.split(':')
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/**@type {string}*/
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let soFar
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if (label1 === 'tunnel') {
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const [hubPubkey, targetPubkey] = pieces
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soFar = `tunnel/${hubPubkey}.${targetPubkey}`
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} else {
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const transport = label1 === 'net' ? 'tcp' : label1 === 'ws' ? 'ws' : null
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if (!transport) throw new Error(`Unknown transport "${label1}"`)
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const [host, port] = pieces
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const hostFormat = IP.isV4Format(host)
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? 'ip4'
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: IP.isV6Format('ipv6')
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? 'ip6'
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: 'dns'
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soFar = `${hostFormat}/${host}/${transport}/${port}`
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}
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if (msTransform) {
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const [label2, pubkey, token] = msTransform.split(':')
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if (label2 !== 'shse') throw new Error(`Unknown transform "${label2}"`)
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if (token) {
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return `/${soFar}/shse/${pubkey}.${token}`
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} else {
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return `/${soFar}/shse/${pubkey}`
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}
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} else {
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return `/${soFar}`
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}
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},
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/**
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* Converts [multiaddr](https://multiformats.io/multiaddr/) (modern) to
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* [multiserver](https://github.com/ssbc/multiserver-address) address (legacy).
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* @param {`/${string}`} multiaddr
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* @returns {string}
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*/
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toMs(multiaddr) {
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if (!multiaddr.startsWith('/')) {
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// prettier-ignore
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throw new Error(`Invalid multiaddr "${multiaddr}"`)
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}
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const pieces = multiaddr.split('/')
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// Parse tunnel multiaddr
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if (pieces[1] === 'tunnel') {
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const [, , pubkeys, transform, cred] = pieces
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const [hubPubkey, targetPubkey] = pubkeys.split('.')
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// prettier-ignore
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if (!hubPubkey || !targetPubkey) throw new Error(`Invalid tunnel multiaddr "${multiaddr}"`)
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const soFar = `tunnel:${hubPubkey}:${targetPubkey}`
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if (transform) {
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// prettier-ignore
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if (transform !== 'shse') throw new Error(`Unknown transform "${transform}"`)
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const [pubkey, token] = cred.split('.')
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if (token) {
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return `${soFar}~shse:${pubkey}:${token}`
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} else {
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return `${soFar}~shse:${pubkey}`
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}
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} else {
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return soFar
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}
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}
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// Parse host+transport multiaddr
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const [, , host, transport, port, transform, cred] = pieces
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const label1 =
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transport === 'tcp' ? 'net' : transport === 'ws' ? 'ws' : null
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if (!label1) throw new Error(`Unknown transport "${transport}"`)
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const soFar = `${label1}:${host}:${port}`
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if (transform) {
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// prettier-ignore
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if (transform !== 'shse') throw new Error(`Unknown transform "${transform}"`)
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const [pubkey, token] = cred.split('.')
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if (token) {
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return `${soFar}~shse:${pubkey}:${token}`
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} else {
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return `${soFar}~shse:${pubkey}`
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}
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} else {
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return soFar
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}
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},
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}
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module.exports = Multiaddr
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