<?php
/**
* Functions for dealing with proxies
+ * @file
*/
+/**
+ * Extracts the XFF string from the request header
+ * Checks first for "X-Forwarded-For", then "Client-ip"
+ * Note: headers are spoofable
+ * @return string
+ */
function wfGetForwardedFor() {
if( function_exists( 'apache_request_headers' ) ) {
// More reliable than $_SERVER due to case and -/_ folding
- $set = apache_request_headers();
- $index = 'X-Forwarded-For';
- $index2 = 'Client-ip';
+ $set = array ();
+ foreach ( apache_request_headers() as $tempName => $tempValue ) {
+ $set[ strtoupper( $tempName ) ] = $tempValue;
+ }
+ $index = strtoupper ( 'X-Forwarded-For' );
+ $index2 = strtoupper ( 'Client-ip' );
} else {
// Subject to spoofing with headers like X_Forwarded_For
$set = $_SERVER;
$index = 'HTTP_X_FORWARDED_FOR';
$index2 = 'CLIENT-IP';
}
+
#Try a couple of headers
if( isset( $set[$index] ) ) {
return $set[$index];
}
}
-function wfGetLastIPfromXFF( $xff ) {
- if ( $xff ) {
- // Avoid annoyingly long xff hacks
- $xff = substr( $xff, 0, 511 );
- // Look for the last IP, assuming they are separated by commas or spaces
- $s = ( strrpos($xff, ',') ) ? strrpos($xff, ',') : strrpos($xff, ' ');
- if ( $s !== false ) {
- $last = trim( substr( $xff, $s + 1 ) );
- // Make sure it is an IP
- $m = preg_match('#\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}#', $last, $last_ip4);
- $n = preg_match('#:(:[0-9A-Fa-f]{1,4}){1,7}|[0-9A-Fa-f]{1,4}(:{1,2}[0-9A-Fa-f]{1,4}|::$){1,7}#', $last, $last_ip6);
- if ( $m )
- $xff_ip = $last_ip4;
- else if ( $n )
- $xff_ip = $last_ip6;
- else
- $xff_ip = null;
- } else {
- $xff_ip = null;
- }
- } else {
- $xff_ip = null;
- }
- return $xff_ip;
-}
-
-function wfGetClientIPfromXFF( $xff ) {
- if ( $xff ) {
- // Avoid annoyingly long xff hacks
- $xff = substr( $xff, 0, 511 );
- // Look for the first IP
- $m = preg_match('#\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}#', $xff, $first_ip);
- $n = preg_match('#:(:[0-9A-Fa-f]{1,4}){1,7}|[0-9A-Fa-f]{1,4}(:{1,2}[0-9A-Fa-f]{1,4}|::$){1,7}#', $xff, $first_ip);
- if ( $m )
- $xff_ip = $first_ip4;
- else if ( $n )
- $xff_ip = $first_ip6;
- else
- $xff_ip = null;
- } else {
- $xff_ip = null;
- }
- return $xff_ip;
-}
-
+/**
+ * Returns the browser/OS data from the request header
+ * Note: headers are spoofable
+ * @return string
+ */
function wfGetAgent() {
if( function_exists( 'apache_request_headers' ) ) {
// More reliable than $_SERVER due to case and -/_ folding
- $set = apache_request_headers();
- $index = 'User-Agent';
+ $set = array ();
+ foreach ( apache_request_headers() as $tempName => $tempValue ) {
+ $set[ strtoupper( $tempName ) ] = $tempValue;
+ }
+ $index = strtoupper ( 'User-Agent' );
} else {
// Subject to spoofing with headers like X_Forwarded_For
$set = $_SERVER;
}
}
-/** Work out the IP address based on various globals */
+/**
+ * Work out the IP address based on various globals
+ * For trusted proxies, use the XFF client IP (first of the chain)
+ * @return string
+ */
function wfGetIP() {
global $wgIP;
$xff = array_reverse( $xff );
$ipchain = array_merge( $ipchain, $xff );
}
-
+
# Step through XFF list and find the last address in the list which is a trusted server
# Set $ip to the IP address given by that trusted server, unless the address is not sensible (e.g. private)
foreach ( $ipchain as $i => $curIP ) {
return $ip;
}
+/**
+ * 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 and AOL are whitelisted
+ * @param string $ip
+ * @return bool
+ */
function wfIsTrustedProxy( $ip ) {
global $wgSquidServers, $wgSquidServersNoPurge;
- if ( in_array( $ip, $wgSquidServers ) ||
- in_array( $ip, $wgSquidServersNoPurge ) ||
- wfIsAOLProxy( $ip )
+ if ( in_array( $ip, $wgSquidServers ) ||
+ in_array( $ip, $wgSquidServersNoPurge ) ||
+ wfIsAOLProxy( $ip )
) {
$trusted = true;
} else {
*/
function wfProxyCheck() {
global $wgBlockOpenProxies, $wgProxyPorts, $wgProxyScriptPath;
- global $wgUseMemCached, $wgMemc, $wgProxyMemcExpiry;
+ global $wgMemc, $wgProxyMemcExpiry;
global $wgProxyKey;
if ( !$wgBlockOpenProxies ) {
$ip = wfGetIP();
# Get MemCached key
- $skip = false;
- if ( $wgUseMemCached ) {
- $mcKey = wfMemcKey( 'proxy', 'ip', $ip );
- $mcValue = $wgMemc->get( $mcKey );
- if ( $mcValue ) {
- $skip = true;
- }
- }
+ $mcKey = wfMemcKey( 'proxy', 'ip', $ip );
+ $mcValue = $wgMemc->get( $mcKey );
+ $skip = (bool)$mcValue;
# Fork the processes
if ( !$skip ) {
exec( "php $params &>/dev/null &" );
}
# Set MemCached key
- if ( $wgUseMemCached ) {
- $wgMemc->set( $mcKey, 1, $wgProxyMemcExpiry );
- }
+ $wgMemc->set( $mcKey, 1, $wgProxyMemcExpiry );
}
}
/**
* Convert a network specification in CIDR notation to an integer network and a number of bits
+ * @return array(string, int)
*/
function wfParseCIDR( $range ) {
return IP::parseCIDR( $range );
/**
* Check if an IP address is in the local proxy list
+ * @return bool
*/
function wfIsLocallyBlockedProxy( $ip ) {
global $wgProxyList;
/**
* TODO: move this list to the database in a global IP info table incorporating
* trusted ISP proxies, blocked IP addresses and open proxies.
+ * @return bool
*/
function wfIsAOLProxy( $ip ) {
+ # From http://webmaster.info.aol.com/proxyinfo.html
$ranges = array(
'64.12.96.0/19',
'149.174.160.0/20',
}
return false;
}
-
-
-
-?>
dépôts / lhc / web / wiklou.git / blobdiff