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Add IpFilter class that can handle CIDR, IPv6, wildcard ranges

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Kijin Sung 2016-02-02 09:14:31 +09:00
parent cca5e7cf6b
commit 409ab63276
1 changed files with 175 additions and 0 deletions
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175
common/framework/ipfilter.php Normal file
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<?php
namespace Rhymix\Framework;
/**
* The IP filter class.
*/
class IpFilter
{
/**
* Check whether the given IP address belongs to a range.
*
* @param string $ip
* @param string $range
* @return bool
*/
public static function inRange($ip, $range)
{
// Determine the type of the IP address.
if (preg_match('/[0-9]+\.[0-9]+\.[0-9]+\.[0-9]+$/', $ip, $matches))
{
$ip = $matches[0];
$ip_type = 4;
}
elseif (preg_match('/^[0-9a-f:]+$/i', $ip))
{
$ip = strtolower($ip);
$ip_type = 6;
}
// Determine the type of the range.
if ($ip_type === 6 && strpos($range, ':') !== false)
{
$range_type = 'ipv6_cidr';
}
elseif ($ip_type === 4 && strpos($range, '*') !== false)
{
$range_type = 'ipv4_wildcard';
}
elseif ($ip_type === 4 && strpos($range, '-') !== false)
{
$range_type = 'ipv4_hyphen';
}
elseif ($ip_type === 4 && strpos($range, '.') !== false)
{
$range_type = 'ipv4_cidr';
}
else
{
$range_type = 'unknown';
}
// Check!
switch ($range_type)
{
case 'ipv4_cidr':
return self::_checkIPv4CIDR($ip, $range);
case 'ipv6_cidr':
return self::_checkIPv6CIDR($ip, $range);
case 'ipv4_wildcard':
return self::_checkIPv4Wildcard($ip, $range);
case 'ipv4_hyphen':
return self::_checkIPv4Hyphen($ip, $range);
default:
return false;
}
}
/**
* Check whether a range definition is valid.
*
* @param string $range
* @return bool
*/
public static function validateRange($range)
{
$regexes = array(
'/^\d+\.\d+\.\d+\.\d+(\/\d+)?$/',
'/^\d+\.(\d+|\*)(\.(\d+|\*)(\.(\d+|\*))?)?$/',
'/^\d+\.\d+\.\d+\.\d+-\d+\.\d+\.\d+\.\d+$/',
'/^[0-9a-f:]+(\/\d+)?$/i',
);
foreach ($regexes as $regex)
{
if (preg_match($regex, $range))
{
return true;
}
}
return false;
}
/**
* Check whether the given IPv4 address belongs to a IPv4 CIDR range with mask.
*
* Example: 172.16.0.0/12
*
* @param string $ip
* @param string $range
* @return bool
*/
protected static function _checkIPv4CIDR($ip, $range)
{
if (strpos($range, '/') === false) $range .= '/32';
list($range, $mask) = explode('/', $range);
$ip = ip2long($ip) & (0xffffffff << (32 - $mask));
$range = ip2long($range) & (0xffffffff << (32 - $mask));
return $ip === $range;
}
/**
* Check whether the given IPv4 address belongs to a IPv6 CIDR range with mask.
*
* Example: 2400:cb00::/32
*
* @param string $ip
* @param string $range
* @return bool
*/
protected static function _checkIPv6CIDR($ip, $range)
{
if (function_exists('inet_pton'))
{
if (strpos($range, '/') === false) $range .= '/128';
list($range, $mask) = explode('/', $range);
$ip = substr(bin2hex(inet_pton($ip)), 0, intval($mask / 4));
$range = substr(bin2hex(inet_pton($range)), 0, intval($mask / 4));
return $ip === $range;
}
else
{
return false;
}
}
/**
* Check whether the given IPv4 address belongs to a IPv4 wildcard range.
*
* Example: 192.168.*.*
*
* @param string $ip
* @param string $range
* @return bool
*/
protected static function _checkIPv4Wildcard($ip, $range)
{
$count = count(explode('.', $range));
if ($count < 4)
{
$range .= str_repeat('.*', 4 - $count);
}
$range = str_replace(array('.', '*'), array('\\.', '\\d+'), trim($range));
var_dump($ip, $range);
return preg_match("/^$range$/", $ip) ? true : false;
}
/**
* Check whether the given IPv4 address belongs to a IPv4 hyphen range.
*
* Example: 192.168.0.0-192.168.255.255
*
* @param string $ip
* @param string $range
* @return bool
*/
protected static function _checkIPv4Hyphen($ip, $range)
{
$ip = sprintf('%u', ip2long($ip));
list($range_start, $range_end) = explode('-', $range);
$range_start = sprintf('%u', ip2long(trim($range_start)));
$range_end = sprintf('%u', ip2long(trim($range_end)));
return ($ip >= $range_start && $ip <= $range_end);
}
}