0d073fa89e
- Add GETTING_STARTED.md with quick start guide and development modes - Add INSTALL.sh automated installation script - Add INSTALLATION_CHECKLIST.md, INSTALLATION_SUCCESS.md, and INSTALLATION_SUMMARY.md - Add QUICK_REFERENCE.md for common commands - Add SETUP_GUIDE.md with detailed setup instructions - Update README.md with improved project overview - Add did-wallet app dependencies and node_modules
51 lines
1.1 KiB
JavaScript
51 lines
1.1 KiB
JavaScript
import * as dnsPacket from '@leichtgewicht/dns-packet'
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import net from 'net'
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let response = null
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let expectedLength = 0
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function getRandomInt (min, max) {
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return Math.floor(Math.random() * (max - min + 1)) + min
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}
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const buf = dnsPacket.streamEncode({
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type: 'query',
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id: getRandomInt(1, 65534),
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flags: dnsPacket.RECURSION_DESIRED,
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questions: [{
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type: 'A',
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name: 'google.com'
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}]
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})
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const client = new net.Socket()
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client.connect(53, '8.8.8.8', function () {
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console.log('Connected')
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client.write(buf)
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})
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client.on('data', function (data) {
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console.log('Received response: %d bytes', data.byteLength)
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if (response == null) {
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if (data.byteLength > 1) {
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const plen = data.readUInt16BE(0)
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expectedLength = plen
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if (plen < 12) {
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throw new Error('below DNS minimum packet length')
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}
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response = Buffer.from(data)
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}
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} else {
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response = Buffer.concat([response, data])
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}
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if (response.byteLength >= expectedLength) {
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console.log(dnsPacket.streamDecode(response))
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client.destroy()
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}
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})
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client.on('close', function () {
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console.log('Connection closed')
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})
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