+++ /dev/null
-<?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 = 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];
- } else if( isset( $set[$index2] ) ) {
- return $set[$index2];
- } else {
- return null;
- }
-}
-
-/**
- * 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 = 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;
- $index = 'HTTP_USER_AGENT';
- }
- if( isset( $set[$index] ) ) {
- return $set[$index];
- } else {
- return '';
- }
-}
-
-/**
- * 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, $wgUsePrivateIPs;
-
- # Return cached result
- if ( !empty( $wgIP ) ) {
- return $wgIP;
- }
-
- /* collect the originating ips */
- # Client connecting to this webserver
- if ( isset( $_SERVER['REMOTE_ADDR'] ) ) {
- $ipchain = array( IP::canonicalize( $_SERVER['REMOTE_ADDR'] ) );
- } else {
- # Running on CLI?
- $ipchain = array( '127.0.0.1' );
- }
- $ip = $ipchain[0];
-
- # Append XFF on to $ipchain
- $forwardedFor = wfGetForwardedFor();
- if ( isset( $forwardedFor ) ) {
- $xff = array_map( 'trim', explode( ',', $forwardedFor ) );
- $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 ) {
- $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;
- }
- }
-
- 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
- * @return bool
- */
-function wfIsTrustedProxy( $ip ) {
- global $wgSquidServers, $wgSquidServersNoPurge;
-
- if ( in_array( $ip, $wgSquidServers ) ||
- in_array( $ip, $wgSquidServersNoPurge )
- ) {
- $trusted = true;
- } else {
- $trusted = false;
- }
- wfRunHooks( 'IsTrustedProxy', array( &$ip, &$trusted ) );
- 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;
- global $wgProxyKey;
-
- if ( !$wgBlockOpenProxies ) {
- return;
- }
-
- $ip = wfGetIP();
-
- # 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 = $title->getFullURL( 'ip='.$iphash );
-
- foreach ( $wgProxyPorts as $port ) {
- $params = implode( ' ', array(
- escapeshellarg( $wgProxyScriptPath ),
- escapeshellarg( $ip ),
- escapeshellarg( $port ),
- escapeshellarg( $url )
- ));
- exec( "php $params &>/dev/null &" );
- }
- # Set MemCached key
- $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;
- $fname = 'wfIsLocallyBlockedProxy';
-
- if ( !$wgProxyList ) {
- return false;
- }
- wfProfileIn( $fname );
-
- 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( $fname );
- return $ret;
-}
-
scripts.mit.edu / autoinstallsdev / mediawiki.git / blobdiff