/includes/ProxyTools.php
PHP | 126 lines | 54 code | 11 blank | 61 comment | 2 complexity | 3f6363b5c8427ecdfcfda06c5ca2817b MD5 | raw file
Possible License(s): GPL-2.0, Apache-2.0, LGPL-3.0
- <?php
- /**
- * Functions for dealing with proxies.
- *
- * 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
- */
- /**
- * Extracts the XFF string from the request header
- * Note: headers are spoofable
- *
- * @deprecated in 1.19; use $wgRequest->getHeader( 'X-Forwarded-For' ) instead.
- * @return string
- */
- function wfGetForwardedFor() {
- wfDeprecated( __METHOD__, '1.19' );
- global $wgRequest;
- return $wgRequest->getHeader( 'X-Forwarded-For' );
- }
- /**
- * Returns the browser/OS data from the request header
- * Note: headers are spoofable
- *
- * @deprecated in 1.18; use $wgRequest->getHeader( 'User-Agent' ) instead.
- * @return string
- */
- function wfGetAgent() {
- wfDeprecated( __METHOD__, '1.18' );
- global $wgRequest;
- return $wgRequest->getHeader( 'User-Agent' );
- }
- /**
- * Work out the IP address based on various globals
- * For trusted proxies, use the XFF client IP (first of the chain)
- *
- * @deprecated in 1.19; call $wgRequest->getIP() directly.
- * @return string
- */
- function wfGetIP() {
- wfDeprecated( __METHOD__, '1.19' );
- global $wgRequest;
- return $wgRequest->getIP();
- }
- /**
- * Checks if an IP is a trusted proxy providor.
- * Useful to tell if X-Fowarded-For data is possibly bogus.
- * Squid cache servers for the site are whitelisted.
- *
- * @param $ip String
- * @return bool
- */
- function wfIsTrustedProxy( $ip ) {
- $trusted = wfIsConfiguredProxy( $ip );
- wfRunHooks( 'IsTrustedProxy', array( &$ip, &$trusted ) );
- return $trusted;
- }
- /**
- * Checks if an IP matches a proxy we've configured.
- * @param $ip String
- * @return bool
- */
- function wfIsConfiguredProxy( $ip ) {
- global $wgSquidServers, $wgSquidServersNoPurge;
- $trusted = in_array( $ip, $wgSquidServers ) ||
- in_array( $ip, $wgSquidServersNoPurge );
- return $trusted;
- }
- /**
- * Forks processes to scan the originating IP for an open proxy server
- * MemCached can be used to skip IPs that have already been scanned
- */
- function wfProxyCheck() {
- global $wgBlockOpenProxies, $wgProxyPorts, $wgProxyScriptPath;
- global $wgMemc, $wgProxyMemcExpiry, $wgRequest;
- global $wgProxyKey;
- if ( !$wgBlockOpenProxies ) {
- return;
- }
- $ip = $wgRequest->getIP();
- # Get MemCached key
- $mcKey = wfMemcKey( 'proxy', 'ip', $ip );
- $mcValue = $wgMemc->get( $mcKey );
- $skip = (bool)$mcValue;
- # Fork the processes
- if ( !$skip ) {
- $title = SpecialPage::getTitleFor( 'Blockme' );
- $iphash = md5( $ip . $wgProxyKey );
- $url = wfExpandUrl( $title->getFullURL( 'ip='.$iphash ), PROTO_HTTP );
- foreach ( $wgProxyPorts as $port ) {
- $params = implode( ' ', array(
- escapeshellarg( $wgProxyScriptPath ),
- escapeshellarg( $ip ),
- escapeshellarg( $port ),
- escapeshellarg( $url )
- ));
- exec( "php $params >" . wfGetNull() . " 2>&1 &" );
- }
- # Set MemCached key
- $wgMemc->set( $mcKey, 1, $wgProxyMemcExpiry );
- }
- }