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<?php |
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declare(strict_types=1); |
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5
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namespace Ecodev\Felix\Validator; |
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6
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7
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abstract class IPRange |
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8
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{ |
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9
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22 |
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final public static function matches(string $ip, string $cidr): bool |
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10
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{ |
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22 |
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if (str_contains($ip, ':')) { |
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12
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9 |
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return self::matchesIPv6($ip, $cidr); |
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} |
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14
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15
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return self::matchesIPv4($ip, $cidr); |
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} |
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13 |
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private static function matchesIPv4(string $ip, string $cidr): bool |
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{ |
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13 |
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$mask = 32; |
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$subnet = $cidr; |
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23
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13 |
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if (str_contains($cidr, '/')) { |
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7 |
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[$subnet, $mask] = explode('/', $cidr, 2); |
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7 |
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$mask = (int) $mask; |
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} |
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28
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13 |
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if ($mask < 0 || $mask > 32) { |
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1 |
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return false; |
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} |
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31
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32
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12 |
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$ip = ip2long($ip); |
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33
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12 |
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$subnet = ip2long($subnet); |
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34
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12 |
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if (false === $ip || false === $subnet) { |
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// Invalid data |
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return false; |
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37
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} |
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38
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39
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7 |
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return 0 === substr_compare( |
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40
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sprintf('%032b', $ip), |
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7 |
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sprintf('%032b', $subnet), |
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0, |
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$mask |
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); |
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} |
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46
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47
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9 |
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private static function matchesIPv6(string $ip, string $cidr): bool |
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48
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{ |
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49
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9 |
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$mask = 128; |
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50
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9 |
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$subnet = $cidr; |
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51
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52
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9 |
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if (str_contains($cidr, '/')) { |
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53
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4 |
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[$subnet, $mask] = explode('/', $cidr, 2); |
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4 |
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$mask = (int) $mask; |
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} |
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56
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57
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9 |
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if ($mask < 0 || $mask > 128) { |
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58
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return false; |
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59
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} |
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60
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61
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9 |
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$ip = inet_pton($ip); |
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9 |
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$subnet = inet_pton($subnet); |
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63
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64
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9 |
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if (false === $ip || false === $subnet) { |
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// Invalid data |
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66
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2 |
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return false; |
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67
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} |
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68
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69
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// mask 0: if it's a valid IP, it's valid |
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70
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7 |
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if ($mask === 0) { |
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71
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2 |
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return (bool) unpack('n*', $ip); |
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72
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} |
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73
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74
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/** @see http://stackoverflow.com/questions/7951061/matching-ipv6-address-to-a-cidr-subnet, MW answer */ |
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5 |
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$binMask = str_repeat('f', (int) ($mask / 4)); |
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5 |
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switch ($mask % 4) { |
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5 |
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case 0: |
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3 |
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break; |
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79
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2 |
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case 1: |
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80
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2 |
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$binMask .= '8'; |
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81
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82
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2 |
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break; |
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83
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case 2: |
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84
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$binMask .= 'c'; |
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85
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86
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break; |
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87
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case 3: |
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88
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$binMask .= 'e'; |
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89
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90
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break; |
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91
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} |
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92
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93
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5 |
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$binMask = str_pad($binMask, 32, '0'); |
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94
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5 |
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$binMask = pack('H*', $binMask); |
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95
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96
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5 |
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return ($ip & $binMask) === $subnet; |
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97
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} |
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98
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} |
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99
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Ecodev /
felix
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