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<?php
/**
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
* http://www.gnu.org/copyleft/gpl.html
*
* @file
*/
use Wikimedia\IPSet;
/**
* @since 1.28
*/
class ProxyLookup {
/**
* @var string[]
*/
private $proxyServers;
/**
* @var string[]
*/
private $proxyServersComplex;
/**
* @var IPSet|null
*/
private $proxyIPSet;
/**
* @param string[] $proxyServers Simple list of IPs
* @param string[] $proxyServersComplex Complex list of IPs/ranges
*/
public function __construct( $proxyServers, $proxyServersComplex ) {
$this->proxyServers = $proxyServers;
$this->proxyServersComplex = $proxyServersComplex;
}
/**
* Checks if an IP matches a proxy we've configured
*
* @param string $ip
* @return bool
*/
public function isConfiguredProxy( $ip ) {
// Quick check of known singular proxy servers
if ( in_array( $ip, $this->proxyServers ) ) {
return true;
}
// Check against addresses and CIDR nets in the complex list
if ( !$this->proxyIPSet ) {
$this->proxyIPSet = new IPSet( $this->proxyServersComplex );
}
return $this->proxyIPSet->match( $ip );
}
/**
* Checks if an IP is a trusted proxy provider.
* Useful to tell if X-Forwarded-For data is possibly bogus.
* CDN cache servers for the site are whitelisted.
*
* @param string $ip
* @return bool
*/
public function isTrustedProxy( $ip ) {
$trusted = $this->isConfiguredProxy( $ip );
Hooks::run( 'IsTrustedProxy', [ &$ip, &$trusted ] );
return $trusted;
}
}
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