|
1
|
|
|
<?php |
|
2
|
|
|
|
|
3
|
|
|
namespace Thruster\Component\Dns; |
|
4
|
|
|
|
|
5
|
|
|
/** |
|
6
|
|
|
* Class Dumper |
|
7
|
|
|
* |
|
8
|
|
|
* @package Thruster\Component\Dns |
|
9
|
|
|
* @author Aurimas Niekis <[email protected]> |
|
10
|
|
|
*/ |
|
11
|
|
|
class Dumper |
|
12
|
|
|
{ |
|
13
|
|
|
public function toBinary(Message $message) : string |
|
14
|
|
|
{ |
|
15
|
|
|
$data = ''; |
|
16
|
|
|
|
|
17
|
|
|
$data .= $this->headerToBinary($message->header); |
|
18
|
|
|
$data .= $this->questionToBinary($message->questions); |
|
19
|
|
|
|
|
20
|
|
|
return $data; |
|
21
|
|
|
} |
|
22
|
|
|
|
|
23
|
|
|
private function headerToBinary(HeaderBag $header) : string |
|
24
|
|
|
{ |
|
25
|
|
|
$data = ''; |
|
26
|
|
|
|
|
27
|
|
|
$data .= pack('n', $header->get('id')); |
|
28
|
|
|
|
|
29
|
|
|
$flags = 0x00; |
|
30
|
|
|
$flags = ($flags << 1) | $header->get('qr'); |
|
31
|
|
|
$flags = ($flags << 4) | $header->get('opcode'); |
|
32
|
|
|
$flags = ($flags << 1) | $header->get('aa'); |
|
33
|
|
|
$flags = ($flags << 1) | $header->get('tc'); |
|
34
|
|
|
$flags = ($flags << 1) | $header->get('rd'); |
|
35
|
|
|
$flags = ($flags << 1) | $header->get('ra'); |
|
36
|
|
|
$flags = ($flags << 3) | $header->get('z'); |
|
37
|
|
|
$flags = ($flags << 4) | $header->get('rcode'); |
|
38
|
|
|
|
|
39
|
|
|
$data .= pack('n', $flags); |
|
40
|
|
|
|
|
41
|
|
|
$data .= pack('n', $header->get('qdCount')); |
|
42
|
|
|
$data .= pack('n', $header->get('anCount')); |
|
43
|
|
|
$data .= pack('n', $header->get('nsCount')); |
|
44
|
|
|
$data .= pack('n', $header->get('arCount')); |
|
45
|
|
|
|
|
46
|
|
|
return $data; |
|
47
|
|
|
} |
|
48
|
|
|
|
|
49
|
|
|
private function questionToBinary(array $questions) : string |
|
50
|
|
|
{ |
|
51
|
|
|
$data = ''; |
|
52
|
|
|
|
|
53
|
|
|
/** @var Query $question */ |
|
54
|
|
|
foreach ($questions as $question) { |
|
55
|
|
|
$labels = explode('.', $question->getName()); |
|
56
|
|
|
foreach ($labels as $label) { |
|
57
|
|
|
$data .= chr(strlen($label)).$label; |
|
58
|
|
|
} |
|
59
|
|
|
$data .= "\x00"; |
|
60
|
|
|
|
|
61
|
|
|
$data .= pack('n*', $question->getType(), $question->getClass()); |
|
62
|
|
|
} |
|
63
|
|
|
|
|
64
|
|
|
return $data; |
|
65
|
|
|
} |
|
66
|
|
|
} |
|
67
|
|
|
|
ThrusterIO /
dns
