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<?php
/**
* Piwik - Open source web analytics
*
* @link http://piwik.org
* @license http://www.gnu.org/licenses/gpl-3.0.html GPL v3 or later
*
* @category Piwik_Plugins
* @package AnonymizeIP
*/
namespace Piwik\Plugins\AnonymizeIP;
use Piwik\Common;
use Piwik\Config;
use Piwik\IP;
use Piwik\Version;
/**
* Anonymize visitor IP addresses to comply with the privacy laws/guidelines in countries, such as Germany.
*
* @package AnonymizeIP
*/
class AnonymizeIP extends \Piwik\Plugin
{
/**
* @see Piwik_Plugin::getInformation
*/
public function getInformation()
{
return array(
'description' => Piwik_Translate('AnonymizeIP_PluginDescription'),
'author' => 'Piwik',
'author_homepage' => 'http://piwik.org/',
'version' => Version::VERSION,
);
}
/**
* @see Piwik_Plugin::getListHooksRegistered
*/
public function getListHooksRegistered()
{
return array(
'Tracker.setVisitorIp' => 'setVisitorIpAddress',
);
}
/**
* Internal function to mask portions of the visitor IP address
*
* @param string $ip IP address in network address format
* @param int $maskLength Number of octets to reset
* @return string
*/
public static function applyIPMask($ip, $maskLength)
{
// IPv4 or mapped IPv4 in IPv6
if(IP::isIPv4($ip)) {
$i = Common::strlen($ip);
if ($maskLength > $i) {
$maskLength = $i;
}
while ($maskLength-- > 0) {
$ip[--$i] = chr(0);
}
} else {
$masks = array(
'ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff',
'ffff:ffff:ffff:ffff::',
'ffff:ffff:ffff:0000::',
'ffff:ff00:0000:0000::'
);
return $ip & pack('a16', inet_pton($masks[$maskLength]));
}
return $ip;
}
/**
* Hook on Tracker.Visit.setVisitorIp to anomymize visitor IP addresses
*/
public function setVisitorIpAddress(&$ip)
{
$ip = self::applyIPMask($ip, Config::getInstance()->Tracker['ip_address_mask_length']);
}
}
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