|
1
|
|
|
<?php |
|
2
|
|
|
|
|
3
|
|
|
namespace Yiisoft\NetworkUtilities; |
|
4
|
|
|
|
|
5
|
|
|
class IpHelper |
|
6
|
|
|
{ |
|
7
|
|
|
public const IPV4 = 4; |
|
8
|
|
|
public const IPV6 = 6; |
|
9
|
|
|
|
|
10
|
|
|
/** |
|
11
|
|
|
* The length of IPv6 address in bits |
|
12
|
|
|
*/ |
|
13
|
|
|
private const IPV6_ADDRESS_LENGTH = 128; |
|
14
|
|
|
/** |
|
15
|
|
|
* The length of IPv4 address in bits |
|
16
|
|
|
*/ |
|
17
|
|
|
private const IPV4_ADDRESS_LENGTH = 32; |
|
18
|
|
|
|
|
19
|
|
|
|
|
20
|
|
|
/** |
|
21
|
|
|
* Gets the IP version. Does not perform IP address validation. |
|
22
|
|
|
* |
|
23
|
|
|
* @param string $ip the valid IPv4 or IPv6 address. |
|
24
|
|
|
* @return int [[IPV4]] or [[IPV6]] |
|
25
|
|
|
*/ |
|
26
|
37 |
|
public static function getIpVersion(string $ip): int |
|
27
|
|
|
{ |
|
28
|
37 |
|
return strpos($ip, ':') === false ? self::IPV4 : self::IPV6; |
|
29
|
|
|
} |
|
30
|
|
|
|
|
31
|
|
|
/** |
|
32
|
|
|
* Checks whether IP address or subnet $subnet is contained by $subnet. |
|
33
|
|
|
* |
|
34
|
|
|
* For example, the following code checks whether subnet `192.168.1.0/24` is in subnet `192.168.0.0/22`: |
|
35
|
|
|
* |
|
36
|
|
|
* ```php |
|
37
|
|
|
* IpHelper::inRange('192.168.1.0/24', '192.168.0.0/22'); // true |
|
38
|
|
|
* ``` |
|
39
|
|
|
* |
|
40
|
|
|
* In case you need to check whether a single IP address `192.168.1.21` is in the subnet `192.168.1.0/24`, |
|
41
|
|
|
* you can use any of theses examples: |
|
42
|
|
|
* |
|
43
|
|
|
* ```php |
|
44
|
|
|
* IpHelper::inRange('192.168.1.21', '192.168.1.0/24'); // true |
|
45
|
|
|
* IpHelper::inRange('192.168.1.21/32', '192.168.1.0/24'); // true |
|
46
|
|
|
* ``` |
|
47
|
|
|
* |
|
48
|
|
|
* @param string $subnet the valid IPv4 or IPv6 address or CIDR range, e.g.: `10.0.0.0/8` or `2001:af::/64` |
|
49
|
|
|
* @param string $range the valid IPv4 or IPv6 CIDR range, e.g. `10.0.0.0/8` or `2001:af::/64` |
|
50
|
|
|
* @return bool whether $subnet is contained by $range |
|
51
|
|
|
* |
|
52
|
|
|
* @see https://en.wikipedia.org/wiki/Classless_Inter-Domain_Routing |
|
53
|
|
|
*/ |
|
54
|
10 |
|
public static function inRange(string $subnet, string $range): bool |
|
55
|
|
|
{ |
|
56
|
10 |
|
[$ip, $mask] = array_pad(explode('/', $subnet), 2, null); |
|
57
|
10 |
|
[$net, $netMask] = array_pad(explode('/', $range), 2, null); |
|
58
|
|
|
|
|
59
|
10 |
|
$ipVersion = static::getIpVersion($ip); |
|
60
|
10 |
|
$netVersion = static::getIpVersion($net); |
|
61
|
10 |
|
if ($ipVersion !== $netVersion) { |
|
62
|
|
|
return false; |
|
63
|
|
|
} |
|
64
|
|
|
|
|
65
|
10 |
|
$maxMask = $ipVersion === self::IPV4 ? self::IPV4_ADDRESS_LENGTH : self::IPV6_ADDRESS_LENGTH; |
|
66
|
10 |
|
$mask = $mask ?? $maxMask; |
|
67
|
10 |
|
$netMask = $netMask ?? $maxMask; |
|
68
|
|
|
|
|
69
|
10 |
|
$binIp = static::ip2bin($ip); |
|
70
|
10 |
|
$binNet = static::ip2bin($net); |
|
71
|
10 |
|
$masked = substr($binNet, 0, $netMask); |
|
72
|
|
|
|
|
73
|
10 |
|
return ($masked === '' || strpos($binIp, $masked) === 0) && $mask >= $netMask; |
|
74
|
|
|
} |
|
75
|
|
|
|
|
76
|
|
|
/** |
|
77
|
|
|
* Expands an IPv6 address to it's full notation. |
|
78
|
|
|
* |
|
79
|
|
|
* For example `2001:db8::1` will be expanded to `2001:0db8:0000:0000:0000:0000:0000:0001` |
|
80
|
|
|
* |
|
81
|
|
|
* @param string $ip the original valid IPv6 address |
|
82
|
|
|
* @return string the expanded IPv6 address |
|
83
|
|
|
*/ |
|
84
|
3 |
|
public static function expandIPv6(string $ip): string |
|
85
|
|
|
{ |
|
86
|
3 |
|
$ipRaw = @inet_pton($ip); |
|
87
|
3 |
|
if ($ipRaw === false) { |
|
88
|
1 |
|
if (@inet_pton('::1') === false) { |
|
89
|
|
|
throw new \RuntimeException('IPv6 is not supported by inet_pton()!'); |
|
90
|
|
|
} |
|
91
|
1 |
|
throw new \InvalidArgumentException("Unrecognized address $ip"); |
|
92
|
|
|
} |
|
93
|
2 |
|
$hex = unpack('H*hex', $ipRaw); |
|
94
|
2 |
|
return substr(preg_replace('/([a-f0-9]{4})/i', '$1:', $hex['hex']), 0, -1); |
|
95
|
|
|
} |
|
96
|
|
|
|
|
97
|
|
|
/** |
|
98
|
|
|
* Converts IP address to bits representation. |
|
99
|
|
|
* |
|
100
|
|
|
* @param string $ip the valid IPv4 or IPv6 address |
|
101
|
|
|
* @return string bits as a string |
|
102
|
|
|
*/ |
|
103
|
15 |
|
public static function ip2bin(string $ip): string |
|
104
|
|
|
{ |
|
105
|
15 |
|
$ipBinary = null; |
|
106
|
15 |
|
if (static::getIpVersion($ip) === self::IPV4) { |
|
107
|
8 |
|
$ipBinary = pack('N', ip2long($ip)); |
|
108
|
7 |
|
} elseif (@inet_pton('::1') === false) { |
|
109
|
|
|
throw new \RuntimeException('IPv6 is not supported by inet_pton()!'); |
|
110
|
|
|
} else { |
|
111
|
7 |
|
$ipBinary = inet_pton($ip); |
|
112
|
|
|
} |
|
113
|
|
|
|
|
114
|
15 |
|
$result = ''; |
|
115
|
15 |
|
for ($i = 0, $iMax = strlen($ipBinary); $i < $iMax; $i += 4) { |
|
116
|
15 |
|
$result .= str_pad(decbin(unpack('N', substr($ipBinary, $i, 4))[1]), 32, '0', STR_PAD_LEFT); |
|
117
|
|
|
} |
|
118
|
15 |
|
return $result; |
|
119
|
|
|
} |
|
120
|
|
|
|
|
121
|
|
|
/** |
|
122
|
|
|
* Gets the bits from CIDR Notation. |
|
123
|
|
|
* |
|
124
|
|
|
* @param string $ip IP or IP with CIDR Notation (`127.0.0.1`, `2001:db8:a::123/64`) |
|
125
|
|
|
*/ |
|
126
|
19 |
|
public static function getCidrBits(string $ip): int |
|
127
|
|
|
{ |
|
128
|
19 |
|
if (preg_match('/^(?<ip>.{2,}?)(?:\/(?<bits>-?\d+))?$/', $ip, $matches) === 0) { |
|
129
|
2 |
|
throw new \InvalidArgumentException("Unrecognized address $ip", 1); |
|
130
|
|
|
} |
|
131
|
17 |
|
$ipVersion = static::getIpVersion($matches['ip']); |
|
132
|
17 |
|
$maxBits = $ipVersion === self::IPV6 ? self::IPV6_ADDRESS_LENGTH : self::IPV4_ADDRESS_LENGTH; |
|
133
|
17 |
|
$bits = $matches['bits'] ?? null; |
|
134
|
17 |
|
if ($bits === null) { |
|
135
|
4 |
|
return $maxBits; |
|
136
|
|
|
} |
|
137
|
13 |
|
$bits = (int)$bits; |
|
138
|
13 |
|
if ($bits < 0) { |
|
139
|
2 |
|
throw new \InvalidArgumentException('The number of CIDR bits cannot be negative', 2); |
|
140
|
|
|
} |
|
141
|
11 |
|
if ($bits > $maxBits) { |
|
142
|
2 |
|
throw new \InvalidArgumentException("CIDR bits is greater than $bits", 3); |
|
143
|
|
|
} |
|
144
|
9 |
|
return $bits; |
|
145
|
|
|
} |
|
146
|
|
|
} |
|
147
|
|
|
|
yiisoft /
network-utilities
