354be95608
IP:isInRange() performs several moderately expensive tests via regular
expression matching that can cause unwanted load with a sufficiently
complicated runtime configuration. Check the $wgSquidServersNoPurge
value to see if it includes the CIDR mask separator token ('/') before
continuing on to perform those more expensive tests.
Follows up Ia81bed7d8b42a2d2b200a3ce45a74e3784cdca2a
Bug: 52829
Change-Id: Ia557cb54f3a1bf67c8282140ab748369faa83028
100 lines
2.8 KiB
PHP
100 lines
2.8 KiB
PHP
<?php
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/**
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* Functions for dealing with proxies.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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* http://www.gnu.org/copyleft/gpl.html
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*
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* @file
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*/
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/**
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* Extracts the XFF string from the request header
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* Note: headers are spoofable
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*
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* @deprecated in 1.19; use $wgRequest->getHeader( 'X-Forwarded-For' ) instead.
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* @return string
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*/
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function wfGetForwardedFor() {
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wfDeprecated( __METHOD__, '1.19' );
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global $wgRequest;
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return $wgRequest->getHeader( 'X-Forwarded-For' );
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}
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/**
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* Returns the browser/OS data from the request header
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* Note: headers are spoofable
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*
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* @deprecated in 1.18; use $wgRequest->getHeader( 'User-Agent' ) instead.
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* @return string
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*/
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function wfGetAgent() {
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wfDeprecated( __METHOD__, '1.18' );
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global $wgRequest;
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return $wgRequest->getHeader( 'User-Agent' );
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}
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/**
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* Work out the IP address based on various globals
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* For trusted proxies, use the XFF client IP (first of the chain)
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*
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* @deprecated in 1.19; call $wgRequest->getIP() directly.
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* @return string
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*/
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function wfGetIP() {
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wfDeprecated( __METHOD__, '1.19' );
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global $wgRequest;
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return $wgRequest->getIP();
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}
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/**
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* Checks if an IP is a trusted proxy provider.
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* Useful to tell if X-Forwarded-For data is possibly bogus.
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* Squid cache servers for the site are whitelisted.
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*
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* @param $ip String
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* @return bool
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*/
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function wfIsTrustedProxy( $ip ) {
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$trusted = wfIsConfiguredProxy( $ip );
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wfRunHooks( 'IsTrustedProxy', array( &$ip, &$trusted ) );
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return $trusted;
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}
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/**
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* Checks if an IP matches a proxy we've configured.
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* @param $ip String
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* @return bool
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* @since 1.23 Supports CIDR ranges in $wgSquidServersNoPurge
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*/
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function wfIsConfiguredProxy( $ip ) {
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global $wgSquidServers, $wgSquidServersNoPurge;
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// quick check of known proxy servers
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$trusted = in_array( $ip, $wgSquidServers )
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|| in_array( $ip, $wgSquidServersNoPurge );
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if ( !$trusted ) {
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// slightly slower check to see if the ip is listed directly or in a CIDR
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// block in $wgSquidServersNoPurge
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foreach ( $wgSquidServersNoPurge as $block ) {
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if ( strpos( $block, '/' ) !== false && IP::isInRange( $ip, $block ) ) {
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$trusted = true;
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break;
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}
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}
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}
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return $trusted;
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}
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