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'use strict'
const tls = require('tls')
const dnsPacket = require('..')
var response = null
var expectedLength = 0
function getRandomInt (min, max) {
return Math.floor(Math.random() * (max - min + 1)) + min
}
const buf = dnsPacket.streamEncode({
type: 'query',
id: getRandomInt(1, 65534),
flags: dnsPacket.RECURSION_DESIRED,
questions: [{
type: 'A',
name: 'google.com'
}]
})
const context = tls.createSecureContext({
secureProtocol: 'TLSv1_2_method'
})
const options = {
port: 853,
host: 'getdnsapi.net',
secureContext: context
}
const client = tls.connect(options, () => {
console.log('client connected')
client.write(buf)
})
client.on('data', function (data) {
console.log('Received response: %d bytes', data.byteLength)
if (response == null) {
if (data.byteLength > 1) {
const plen = data.readUInt16BE(0)
expectedLength = plen
if (plen < 12) {
throw new Error('below DNS minimum packet length')
}
response = Buffer.from(data)
}
} else {
response = Buffer.concat([response, data])
}
if (response.byteLength >= expectedLength) {
console.log(dnsPacket.streamDecode(response))
client.destroy()
}
})
client.on('end', () => {
console.log('Connection ended')
})