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dnsserver.js
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dnsserver.js
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const named = require('mname')
const geojson = require('./geojson')
const Domain = require('./domain')
module.exports = (config, archiveManager) => {
const server = named.createServer()
server.listen(config.dnsPort, config.host, () => console.log(`DNS server started on port ${config.dnsPort}`))
server.on('query', query => {
let domain = query.name()
let type = query.type()
if (type === 'A') {
query.addAnswer(domain, new named.ARecord(config.httpIP), config.ttl)
return server.send(query)
}
if (type !== 'TXT') return server.send(query)
archiveManager.findArchive(domain, (archiveError, archive) => {
if (archiveError) {
console.log(`${domain} findArchive failed. ${archiveError}`)
return server.send(query)
}
Domain.mode(archive, domain, (error, info) => {
if (error) {
console.log(`${domain} mode failed. ${error}`)
return server.send(query)
}
let datkey = archive.key.toString('hex')
if (info.isCollectionWithIndex) {
return geojson.center(archive, info.isCollectionWithIndex, (err, info) => {
if (err) {
console.log(err)
return server.send(query)
}
query.addAnswer(domain, new named.TXTRecord(`plat=true;collection=true;datkey=${datkey};l=${info.specifiedCenter}`), config.ttl)
server.send(query)
})
} else if (info.isLeaf) {
return geojson.center(archive, info.isLeaf, (err, info) => {
if (err) {
console.log(err)
return server.send(query)
}
query.addAnswer(domain, new named.TXTRecord(`plat=true;datkey=${datkey};l=${info.specifiedCenter}`), config.ttl)
server.send(query)
})
} else if (info.isCollection) {
query.addAnswer(domain, new named.TXTRecord(`plat=true;collection=true;datkey=${datkey}`), config.ttl)
return server.send(query)
}
return server.send(query) // default, not found
})
})
})
return server
}