3 * Functions for dealing with proxies.
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License along
16 * with this program; if not, write to the Free Software Foundation, Inc.,
17 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
18 * http://www.gnu.org/copyleft/gpl.html
24 * Extracts the XFF string from the request header
25 * Note: headers are spoofable
27 * @deprecated in 1.19; use $wgRequest->getHeader( 'X-Forwarded-For' ) instead.
30 function wfGetForwardedFor() {
31 wfDeprecated( __METHOD__
, '1.19' );
33 return $wgRequest->getHeader( 'X-Forwarded-For' );
37 * Returns the browser/OS data from the request header
38 * Note: headers are spoofable
40 * @deprecated in 1.18; use $wgRequest->getHeader( 'User-Agent' ) instead.
43 function wfGetAgent() {
44 wfDeprecated( __METHOD__
, '1.18' );
46 return $wgRequest->getHeader( 'User-Agent' );
50 * Work out the IP address based on various globals
51 * For trusted proxies, use the XFF client IP (first of the chain)
53 * @deprecated in 1.19; call $wgRequest->getIP() directly.
57 wfDeprecated( __METHOD__
, '1.19' );
59 return $wgRequest->getIP();
63 * Checks if an IP is a trusted proxy provider.
64 * Useful to tell if X-Forwarded-For data is possibly bogus.
65 * Squid cache servers for the site are whitelisted.
70 function wfIsTrustedProxy( $ip ) {
71 $trusted = wfIsConfiguredProxy( $ip );
72 wfRunHooks( 'IsTrustedProxy', array( &$ip, &$trusted ) );
77 * Checks if an IP matches a proxy we've configured.
81 function wfIsConfiguredProxy( $ip ) {
82 global $wgSquidServers, $wgSquidServersNoPurge;
84 // quick check of known proxy servers
85 $trusted = in_array( $ip, $wgSquidServers );
88 // slightly slower check to see if the ip is listed directly or in a CIDR
89 // block in $wgSquidServersNoPurge
90 foreach ( $wgSquidServersNoPurge as $block ) {
91 if ( IP
::isInRange( $ip, $block ) ) {