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Edit File : IpUtils.php \| Size : 5.58 KB
<?php /* * This file is part of the Symfony package. * * (c) Fabien Potencier <fabien@symfony.com> * * For the full copyright and license information, please view the LICENSE * file that was distributed with this source code. / namespace Symfony\Component\HttpFoundation; /* * Http utility functions. * * @author Fabien Potencier <fabien@symfony.com> / class IpUtils { private static $checkedIps = []; /* * This class should not be instantiated. / private function __construct() { } /* * Checks if an IPv4 or IPv6 address is contained in the list of given IPs or subnets. * * @param string $requestIp IP to check * @param string\|array $ips List of IPs or subnets (can be a string if only a single one) * * @return bool Whether the IP is valid / public static function checkIp($requestIp, $ips) { if (!\is_array($ips)) { $ips = [$ips]; } $method = substr_count($requestIp, ':') > 1 ? 'checkIp6' : 'checkIp4'; foreach ($ips as $ip) { if (self::$method($requestIp, $ip)) { return true; } } return false; } /* * Compares two IPv4 addresses. * In case a subnet is given, it checks if it contains the request IP. * * @param string $requestIp IPv4 address to check * @param string $ip IPv4 address or subnet in CIDR notation * * @return bool Whether the request IP matches the IP, or whether the request IP is within the CIDR subnet / public static function checkIp4($requestIp, $ip) { $cacheKey = $requestIp.'-'.$ip; if (isset(self::$checkedIps[$cacheKey])) { return self::$checkedIps[$cacheKey]; } if (!filter_var($requestIp, FILTER_VALIDATE_IP, FILTER_FLAG_IPV4)) { return self::$checkedIps[$cacheKey] = false; } if (false !== strpos($ip, '/')) { list($address, $netmask) = explode('/', $ip, 2); if ('0' === $netmask) { return self::$checkedIps[$cacheKey] = filter_var($address, FILTER_VALIDATE_IP, FILTER_FLAG_IPV4); } if ($netmask < 0 \|\| $netmask > 32) { return self::$checkedIps[$cacheKey] = false; } } else { $address = $ip; $netmask = 32; } if (false === ip2long($address)) { return self::$checkedIps[$cacheKey] = false; } return self::$checkedIps[$cacheKey] = 0 === substr_compare(sprintf('%032b', ip2long($requestIp)), sprintf('%032b', ip2long($address)), 0, $netmask); } /* * Compares two IPv6 addresses. * In case a subnet is given, it checks if it contains the request IP. * * @author David Soria Parra <dsp at php dot net> * * @see https://github.com/dsp/v6tools * * @param string $requestIp IPv6 address to check * @param string $ip IPv6 address or subnet in CIDR notation * * @return bool Whether the IP is valid * * @throws \RuntimeException When IPV6 support is not enabled / public static function checkIp6($requestIp, $ip) { $cacheKey = $requestIp.'-'.$ip; if (isset(self::$checkedIps[$cacheKey])) { return self::$checkedIps[$cacheKey]; } if (!((\extension_loaded('sockets') && \defined('AF_INET6')) \|\| @inet_pton('::1'))) { throw new \RuntimeException('Unable to check Ipv6. Check that PHP was not compiled with option "disable-ipv6".'); } if (false !== strpos($ip, '/')) { list($address, $netmask) = explode('/', $ip, 2); if ('0' === $netmask) { return (bool) unpack('n', @inet_pton($address)); } if ($netmask < 1 \|\| $netmask > 128) { return self::$checkedIps[$cacheKey] = false; } } else { $address = $ip; $netmask = 128; } $bytesAddr = unpack('n', @inet_pton($address)); $bytesTest = unpack('n', @inet_pton($requestIp)); if (!$bytesAddr \|\| !$bytesTest) { return self::$checkedIps[$cacheKey] = false; } for ($i = 1, $ceil = ceil($netmask / 16); $i <= $ceil; ++$i) { $left = $netmask - 16 * ($i - 1); $left = ($left <= 16) ? $left : 16; $mask = ~(0xffff >> $left) & 0xffff; if (($bytesAddr[$i] & $mask) != ($bytesTest[$i] & $mask)) { return self::$checkedIps[$cacheKey] = false; } } return self::$checkedIps[$cacheKey] = true; } /** * Anonymizes an IP/IPv6. * * Removes the last byte for v4 and the last 8 bytes for v6 IPs */ public static function anonymize(string $ip): string { $wrappedIPv6 = false; if ('[' === substr($ip, 0, 1) && ']' === substr($ip, -1, 1)) { $wrappedIPv6 = true; $ip = substr($ip, 1, -1); } $packedAddress = inet_pton($ip); if (4 === \strlen($packedAddress)) { $mask = '255.255.255.0'; } elseif ($ip === inet_ntop($packedAddress & inet_pton('::ffff:ffff:ffff'))) { $mask = '::ffff:ffff:ff00'; } elseif ($ip === inet_ntop($packedAddress & inet_pton('::ffff:ffff'))) { $mask = '::ffff:ff00'; } else { $mask = 'ffff:ffff:ffff:ffff:0000:0000:0000:0000'; } $ip = inet_ntop($packedAddress & inet_pton($mask)); if ($wrappedIPv6) { $ip = '['.$ip.']'; } return $ip; } } Back

Edit File : IpUtils.php | Size : 5.58 KB

<?php

/*
 * This file is part of the Symfony package.
 *
 * (c) Fabien Potencier <fabien@symfony.com>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Symfony\Component\HttpFoundation;

/**
 * Http utility functions.
 *
 * @author Fabien Potencier <fabien@symfony.com>
 */
class IpUtils
{
    private static $checkedIps = [];

/**
     * This class should not be instantiated.
     */
    private function __construct()
    {
    }

/**
     * Checks if an IPv4 or IPv6 address is contained in the list of given IPs or subnets.
     *
     * @param string       $requestIp IP to check
     * @param string|array $ips       List of IPs or subnets (can be a string if only a single one)
     *
     * @return bool Whether the IP is valid
     */
    public static function checkIp($requestIp, $ips)
    {
        if (!\is_array($ips)) {
            $ips = [$ips];
        }

$method = substr_count($requestIp, ':') > 1 ? 'checkIp6' : 'checkIp4';

foreach ($ips as $ip) {
            if (self::$method($requestIp, $ip)) {
                return true;
            }
        }

return false;
    }

/**
     * Compares two IPv4 addresses.
     * In case a subnet is given, it checks if it contains the request IP.
     *
     * @param string $requestIp IPv4 address to check
     * @param string $ip        IPv4 address or subnet in CIDR notation
     *
     * @return bool Whether the request IP matches the IP, or whether the request IP is within the CIDR subnet
     */
    public static function checkIp4($requestIp, $ip)
    {
        $cacheKey = $requestIp.'-'.$ip;
        if (isset(self::$checkedIps[$cacheKey])) {
            return self::$checkedIps[$cacheKey];
        }

if (!filter_var($requestIp, FILTER_VALIDATE_IP, FILTER_FLAG_IPV4)) {
            return self::$checkedIps[$cacheKey] = false;
        }

if (false !== strpos($ip, '/')) {
            list($address, $netmask) = explode('/', $ip, 2);

if ('0' === $netmask) {
                return self::$checkedIps[$cacheKey] = filter_var($address, FILTER_VALIDATE_IP, FILTER_FLAG_IPV4);
            }

if ($netmask < 0 || $netmask > 32) {
                return self::$checkedIps[$cacheKey] = false;
            }
        } else {
            $address = $ip;
            $netmask = 32;
        }

if (false === ip2long($address)) {
            return self::$checkedIps[$cacheKey] = false;
        }

return self::$checkedIps[$cacheKey] = 0 === substr_compare(sprintf('%032b', ip2long($requestIp)), sprintf('%032b', ip2long($address)), 0, $netmask);
    }

/**
     * Compares two IPv6 addresses.
     * In case a subnet is given, it checks if it contains the request IP.
     *
     * @author David Soria Parra <dsp at php dot net>
     *
     * @see https://github.com/dsp/v6tools
     *
     * @param string $requestIp IPv6 address to check
     * @param string $ip        IPv6 address or subnet in CIDR notation
     *
     * @return bool Whether the IP is valid
     *
     * @throws \RuntimeException When IPV6 support is not enabled
     */
    public static function checkIp6($requestIp, $ip)
    {
        $cacheKey = $requestIp.'-'.$ip;
        if (isset(self::$checkedIps[$cacheKey])) {
            return self::$checkedIps[$cacheKey];
        }

if (!((\extension_loaded('sockets') && \defined('AF_INET6')) || @inet_pton('::1'))) {
            throw new \RuntimeException('Unable to check Ipv6. Check that PHP was not compiled with option "disable-ipv6".');
        }

if (false !== strpos($ip, '/')) {
            list($address, $netmask) = explode('/', $ip, 2);

if ('0' === $netmask) {
                return (bool) unpack('n*', @inet_pton($address));
            }

if ($netmask < 1 || $netmask > 128) {
                return self::$checkedIps[$cacheKey] = false;
            }
        } else {
            $address = $ip;
            $netmask = 128;
        }

$bytesAddr = unpack('n*', @inet_pton($address));
        $bytesTest = unpack('n*', @inet_pton($requestIp));

if (!$bytesAddr || !$bytesTest) {
            return self::$checkedIps[$cacheKey] = false;
        }

for ($i = 1, $ceil = ceil($netmask / 16); $i <= $ceil; ++$i) {
            $left = $netmask - 16 * ($i - 1);
            $left = ($left <= 16) ? $left : 16;
            $mask = ~(0xffff >> $left) & 0xffff;
            if (($bytesAddr[$i] & $mask) != ($bytesTest[$i] & $mask)) {
                return self::$checkedIps[$cacheKey] = false;
            }
        }

return self::$checkedIps[$cacheKey] = true;
    }

/**
     * Anonymizes an IP/IPv6.
     *
     * Removes the last byte for v4 and the last 8 bytes for v6 IPs
     */
    public static function anonymize(string $ip): string
    {
        $wrappedIPv6 = false;
        if ('[' === substr($ip, 0, 1) && ']' === substr($ip, -1, 1)) {
            $wrappedIPv6 = true;
            $ip = substr($ip, 1, -1);
        }

$packedAddress = inet_pton($ip);
        if (4 === \strlen($packedAddress)) {
            $mask = '255.255.255.0';
        } elseif ($ip === inet_ntop($packedAddress & inet_pton('::ffff:ffff:ffff'))) {
            $mask = '::ffff:ffff:ff00';
        } elseif ($ip === inet_ntop($packedAddress & inet_pton('::ffff:ffff'))) {
            $mask = '::ffff:ff00';
        } else {
            $mask = 'ffff:ffff:ffff:ffff:0000:0000:0000:0000';
        }
        $ip = inet_ntop($packedAddress & inet_pton($mask));

if ($wrappedIPv6) {
            $ip = '['.$ip.']';
        }

return $ip;
    }
}

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