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dns-suite.js
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fixed how to

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Daplie 2017-01-13 20:04:21 -07:00
parent 086caf48e5
commit a4d4d55f34
1 changed files with 45 additions and 1 deletions
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howto.md
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@ -9,6 +9,50 @@ npm init
how to duplicate DNS crash:
```
cd ~/dns_test
```
How to print out hex and binary values of the message?
```
node listen.js
```
```
dig @224.0.0.251 -p 5353 -t PTR _cloud._tcp.local
```
The output is then:
```
START DNS PACKET
/home/daplie/dns_test/node_modules/dns-js/lib/bufferconsumer.js:52
throw new Error('Buffer overflow')
^
Error: Buffer overflow
at BufferConsumer.slice (/home/daplie/dns_test/node_modules/dns-js/lib/bufferconsumer.js:52:13)
s at Function.DNSRecord.parse (/home/daplie/dns_test/node_modules/dns-js/lib/dnsrecord.js:237:46)
at /home/daplie/dns_test/node_modules/dns-js/lib/dnspacket.js:164:30
at Array.forEach (native)
at Function.DNSPacket.parse (/home/daplie/dns_test/node_modules/dns-js/lib/dnspacket.js:159:17)
at /home/daplie/dns_test/cloud-respond.js:86:31
at Array.forEach (native)
at /home/daplie/dns_test/cloud-respond.js:11:21
at Array.forEach (native)
at Object.module.exports.respond (/home/daplie/dns_test/cloud-respond.js:10:11)
```
How to print out hex values of the DNS message?
```javascript
socket.on('message', function (message, rinfo) {
console.log('Received %d bytes from %s:%d\n',
message.length, rinfo.address, rinfo.port);
//console.log(msg.toString('utf8'));
console.log(message.toString('hex'));
```