1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
|
<?php
/**
* League.Uri (https://uri.thephpleague.com)
*
* (c) Ignace Nyamagana Butera <nyamsprod@gmail.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
declare(strict_types=1);
namespace League\Uri\IPv6;
use Stringable;
use ValueError;
use function filter_var;
use function implode;
use function inet_pton;
use function str_split;
use function strtolower;
use function unpack;
use const FILTER_FLAG_IPV6;
use const FILTER_VALIDATE_IP;
final class Converter
{
/**
* Significant 10 bits of IP to detect Zone ID regular expression pattern.
*
* @var string
*/
private const HOST_ADDRESS_BLOCK = "\xfe\x80";
public static function compressIp(string $ipAddress): string
{
return match (filter_var($ipAddress, FILTER_VALIDATE_IP, FILTER_FLAG_IPV6)) {
false => throw new ValueError('The submitted IP is not a valid IPv6 address.'),
default => strtolower((string) inet_ntop((string) inet_pton($ipAddress))),
};
}
public static function expandIp(string $ipAddress): string
{
if (false === filter_var($ipAddress, FILTER_VALIDATE_IP, FILTER_FLAG_IPV6)) {
throw new ValueError('The submitted IP is not a valid IPv6 address.');
}
$hex = (array) unpack('H*hex', (string) inet_pton($ipAddress));
return implode(':', str_split(strtolower($hex['hex'] ?? ''), 4));
}
public static function compress(Stringable|string|null $host): ?string
{
$components = self::parse($host);
if (null === $components['ipAddress']) {
return match ($host) {
null => $host,
default => (string) $host,
};
}
$components['ipAddress'] = self::compressIp($components['ipAddress']);
return self::build($components);
}
public static function expand(Stringable|string|null $host): ?string
{
$components = self::parse($host);
if (null === $components['ipAddress']) {
return match ($host) {
null => $host,
default => (string) $host,
};
}
$components['ipAddress'] = self::expandIp($components['ipAddress']);
return self::build($components);
}
private static function build(array $components): string
{
$components['ipAddress'] ??= null;
$components['zoneIdentifier'] ??= null;
if (null === $components['ipAddress']) {
return '';
}
return '['.$components['ipAddress'].match ($components['zoneIdentifier']) {
null => '',
default => '%'.$components['zoneIdentifier'],
}.']';
}
/**]
* @param Stringable|string|null $host
*
* @return array{ipAddress:string|null, zoneIdentifier:string|null}
*/
private static function parse(Stringable|string|null $host): array
{
if (null === $host) {
return ['ipAddress' => null, 'zoneIdentifier' => null];
}
$host = (string) $host;
if ('' === $host) {
return ['ipAddress' => null, 'zoneIdentifier' => null];
}
if (!str_starts_with($host, '[')) {
return ['ipAddress' => null, 'zoneIdentifier' => null];
}
if (!str_ends_with($host, ']')) {
return ['ipAddress' => null, 'zoneIdentifier' => null];
}
[$ipv6, $zoneIdentifier] = explode('%', substr($host, 1, -1), 2) + [1 => null];
if (false === filter_var($ipv6, FILTER_VALIDATE_IP, FILTER_FLAG_IPV6)) {
return ['ipAddress' => null, 'zoneIdentifier' => null];
}
return match (true) {
null === $zoneIdentifier,
is_string($ipv6) && str_starts_with((string)inet_pton($ipv6), self::HOST_ADDRESS_BLOCK) => ['ipAddress' => $ipv6, 'zoneIdentifier' => $zoneIdentifier],
default => ['ipAddress' => null, 'zoneIdentifier' => null],
};
}
}
|
