<?php
/**
* Functions for dealing with proxies
+ *
* @file
*/
* @return string
*/
function wfGetForwardedFor() {
- if( function_exists( 'apache_request_headers' ) ) {
+ $apacheHeaders = function_exists( 'apache_request_headers' ) ? apache_request_headers() : null;
+ if( is_array( $apacheHeaders ) ) {
// More reliable than $_SERVER due to case and -/_ folding
- $set = array ();
- foreach ( apache_request_headers() as $tempName => $tempValue ) {
+ $set = array();
+ foreach ( $apacheHeaders as $tempName => $tempValue ) {
$set[ strtoupper( $tempName ) ] = $tempValue;
}
$index = strtoupper ( 'X-Forwarded-For' );
#Try a couple of headers
if( isset( $set[$index] ) ) {
return $set[$index];
- } else if( isset( $set[$index2] ) ) {
+ } elseif( isset( $set[$index2] ) ) {
return $set[$index2];
} else {
return null;
/**
* 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( __FUNCTION__ );
if( function_exists( 'apache_request_headers' ) ) {
// More reliable than $_SERVER due to case and -/_ folding
- $set = array ();
+ $set = array();
foreach ( apache_request_headers() as $tempName => $tempValue ) {
$set[ strtoupper( $tempName ) ] = $tempValue;
}
* @return string
*/
function wfGetIP() {
- global $wgIP, $wgUsePrivateIPs, $wgCommandLineMode;
+ global $wgUsePrivateIPs, $wgCommandLineMode;
+ static $ip = false;
# Return cached result
- if ( !empty( $wgIP ) ) {
- return $wgIP;
+ if ( !empty( $ip ) ) {
+ return $ip;
}
- $ipchain = array();
- $ip = false;
-
/* collect the originating ips */
# Client connecting to this webserver
if ( isset( $_SERVER['REMOTE_ADDR'] ) ) {
} elseif( $wgCommandLineMode ) {
$ip = '127.0.0.1';
}
- if( $ip ) {
- $ipchain[] = $ip;
- }
- # Append XFF on to $ipchain
+ # Append XFF
$forwardedFor = wfGetForwardedFor();
- if ( isset( $forwardedFor ) ) {
- $xff = array_map( 'trim', explode( ',', $forwardedFor ) );
- $xff = array_reverse( $xff );
- $ipchain = array_merge( $ipchain, $xff );
- }
+ if ( $forwardedFor !== null ) {
+ $ipchain = array_map( 'trim', explode( ',', $forwardedFor ) );
+ $ipchain = array_reverse( $ipchain );
+ if ( $ip ) {
+ array_unshift( $ipchain, $ip );
+ }
- # 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 ) {
- $curIP = IP::canonicalize( $curIP );
- if ( wfIsTrustedProxy( $curIP ) ) {
- if ( isset( $ipchain[$i + 1] ) ) {
- if( $wgUsePrivateIPs || IP::isPublic( $ipchain[$i + 1 ] ) ) {
- $ip = $ipchain[$i + 1];
+ # 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 ) {
+ $curIP = IP::canonicalize( $curIP );
+ if ( wfIsTrustedProxy( $curIP ) ) {
+ if ( isset( $ipchain[$i + 1] ) ) {
+ if( $wgUsePrivateIPs || IP::isPublic( $ipchain[$i + 1 ] ) ) {
+ $ip = $ipchain[$i + 1];
+ }
}
+ } else {
+ break;
}
- } else {
- break;
}
}
+ # Allow extensions to improve our guess
+ wfRunHooks( 'GetIP', array( &$ip ) );
+
if( !$ip ) {
throw new MWException( "Unable to determine IP" );
}
wfDebug( "IP: $ip\n" );
- $wgIP = $ip;
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
+ * @param $ip String
* @return bool
*/
function wfIsTrustedProxy( $ip ) {
global $wgSquidServers, $wgSquidServersNoPurge;
- if ( in_array( $ip, $wgSquidServers ) ||
- in_array( $ip, $wgSquidServersNoPurge )
- ) {
- $trusted = true;
- } else {
- $trusted = false;
- }
+ $trusted = in_array( $ip, $wgSquidServers ) ||
+ in_array( $ip, $wgSquidServersNoPurge );
wfRunHooks( 'IsTrustedProxy', array( &$ip, &$trusted ) );
return $trusted;
}
$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 $wgProxyList;
-
- if ( !$wgProxyList ) {
- return false;
- }
- wfProfileIn( __METHOD__ );
-
- if ( !is_array( $wgProxyList ) ) {
- # Load from the specified file
- $wgProxyList = array_map( 'trim', file( $wgProxyList ) );
- }
-
- if ( !is_array( $wgProxyList ) ) {
- $ret = false;
- } elseif ( array_search( $ip, $wgProxyList ) !== false ) {
- $ret = true;
- } elseif ( array_key_exists( $ip, $wgProxyList ) ) {
- # Old-style flipped proxy list
- $ret = true;
- } else {
- $ret = false;
- }
- wfProfileOut( __METHOD__ );
- return $ret;
-}
-