<?php
/**
- * Functions for dealing with proxies
- * @package MediaWiki
+ * Functions for dealing with proxies.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ * http://www.gnu.org/copyleft/gpl.html
+ *
+ * @file
*/
-class ProxyTools {
- function getForwardedFor() {
- if( function_exists( 'apache_request_headers' ) ) {
- // More reliable than $_SERVER due to case and -/_ folding
- $set = apache_request_headers();
- $index = 'X-Forwarded-For';
- } else {
- // Subject to spoofing with headers like X_Forwarded_For
- $set = $_SERVER;
- $index = 'HTTP_X_FORWARDED_FOR';
- }
- if( isset( $set[$index] ) ) {
- return $set[$index];
- } else {
- return null;
- }
- }
-
- /** Work out the IP address based on various globals */
- function getIP() {
- global $wgSquidServers, $wgSquidServersNoPurge, $wgIP;
-
- # Return cached result
- if ( !empty( $wgIP ) ) {
- return $wgIP;
- }
-
- /* collect the originating ips */
- # Client connecting to this webserver
- if ( isset( $_SERVER['REMOTE_ADDR'] ) ) {
- $ipchain = array( $_SERVER['REMOTE_ADDR'] );
- } else {
- # Running on CLI?
- $ipchain = array( '127.0.0.1' );
- }
- $ip = $ipchain[0];
-
- # Get list of trusted proxies
- # Flipped for quicker access
- $trustedProxies = array_flip( array_merge( $wgSquidServers, $wgSquidServersNoPurge ) );
- if ( count( $trustedProxies ) ) {
- # Append XFF on to $ipchain
- $forwardedFor = ProxyTools::getForwardedFor();
- 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 ) {
- if ( array_key_exists( $curIP, $trustedProxies ) ) {
- if ( isset( $ipchain[$i + 1] ) && ProxyTools::isIPPublic( $ipchain[$i + 1] ) ) {
- $ip = $ipchain[$i + 1];
- }
- } else {
- break;
- }
- }
- }
-
- wfDebug( "IP: $ip\n" );
- $wgIP = $ip;
- return $ip;
- }
-
- /**
- * Given an IP address in dotted-quad notation, returns an unsigned integer.
- * Like ip2long() except that it actually works and has a consistent error return value.
- */
- function IP2Unsigned( $ip ) {
- $n = ip2long( $ip );
- if ( $n == -1 || $n === false ) { # Return value on error depends on PHP version
- $n = false;
- } elseif ( $n < 0 ) {
- $n += pow( 2, 32 );
- }
- return $n;
- }
-
- /**
- * Return a zero-padded hexadecimal representation of an IP address
- */
- function IP2Hex( $ip ) {
- $n = ProxyTools::IP2Unsigned( $ip );
- if ( $n !== false ) {
- $n = sprintf( '%08X', $n );
- }
- return $n;
- }
-
- /**
- * Determine if an IP address really is an IP address, and if it is public,
- * i.e. not RFC 1918 or similar
- */
- function isIPPublic( $ip ) {
- $n = ProxyTools::IP2Unsigned( $ip );
- if ( !$n ) {
- return false;
- }
-
- // ip2long accepts incomplete addresses, as well as some addresses
- // followed by garbage characters. Check that it's really valid.
- if( $ip != long2ip( $n ) ) {
- return false;
- }
-
- static $privateRanges = false;
- if ( !$privateRanges ) {
- $privateRanges = array(
- array( '10.0.0.0', '10.255.255.255' ), # RFC 1918 (private)
- array( '172.16.0.0', '172.31.255.255' ), # "
- array( '192.168.0.0', '192.168.255.255' ), # "
- array( '0.0.0.0', '0.255.255.255' ), # this network
- array( '127.0.0.0', '127.255.255.255' ), # loopback
- );
- }
-
- foreach ( $privateRanges as $r ) {
- $start = ProxyTools::IP2Unsigned( $r[0] );
- $end = ProxyTools::IP2Unsigned( $r[1] );
- if ( $n >= $start && $n <= $end ) {
- return false;
- }
- }
- return true;
- }
-
- /**
- * 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 proxyCheck() {
- global $wgBlockOpenProxies, $wgProxyPorts, $wgProxyScriptPath;
- global $wgUseMemCached, $wgMemc, $wgDBname, $wgProxyMemcExpiry;
- global $wgProxyKey;
+/**
+ * Extracts the XFF string from the request header
+ * Note: headers are spoofable
+ *
+ * @deprecated in 1.19; use $wgRequest->getHeader( 'X-Forwarded-For' ) instead.
+ * @return string
+ */
+function wfGetForwardedFor() {
+ wfDeprecated( __METHOD__, '1.19' );
+ global $wgRequest;
+ return $wgRequest->getHeader( 'X-Forwarded-For' );
+}
- if ( !$wgBlockOpenProxies ) {
- return;
- }
+/**
+ * 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( __METHOD__, '1.18' );
+ global $wgRequest;
+ return $wgRequest->getHeader( 'User-Agent' );
+}
- $ip = ProxyTools::getIP();
+/**
+ * Work out the IP address based on various globals
+ * For trusted proxies, use the XFF client IP (first of the chain)
+ *
+ * @deprecated in 1.19; call $wgRequest->getIP() directly.
+ * @return string
+ */
+function wfGetIP() {
+ wfDeprecated( __METHOD__, '1.19' );
+ global $wgRequest;
+ return $wgRequest->getIP();
+}
- # Get MemCached key
- $skip = false;
- if ( $wgUseMemCached ) {
- $mcKey = "$wgDBname:proxy:ip:$ip";
- $mcValue = $wgMemc->get( $mcKey );
- if ( $mcValue ) {
- $skip = true;
- }
- }
+/**
+ * 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 are whitelisted.
+ *
+ * @param $ip String
+ * @return bool
+ */
+function wfIsTrustedProxy( $ip ) {
+ $trusted = wfIsConfiguredProxy( $ip );
+ wfRunHooks( 'IsTrustedProxy', array( &$ip, &$trusted ) );
+ return $trusted;
+}
- # Fork the processes
- if ( !$skip ) {
- $title = Title::makeTitle( NS_SPECIAL, 'Blockme' );
- $iphash = md5( $ip . $wgProxyKey );
- $url = $title->getFullURL( 'ip='.$iphash );
+/**
+ * Checks if an IP matches a proxy we've configured.
+ * @param $ip String
+ * @return bool
+ */
+function wfIsConfiguredProxy( $ip ) {
+ global $wgSquidServers, $wgSquidServersNoPurge;
+ $trusted = in_array( $ip, $wgSquidServers ) ||
+ in_array( $ip, $wgSquidServersNoPurge );
+ return $trusted;
+}
- foreach ( $wgProxyPorts as $port ) {
- $params = implode( ' ', array(
- escapeshellarg( $wgProxyScriptPath ),
- escapeshellarg( $ip ),
- escapeshellarg( $port ),
- escapeshellarg( $url )
- ));
- exec( "php $params &>/dev/null &" );
- }
- # Set MemCached key
- if ( $wgUseMemCached ) {
- $wgMemc->set( $mcKey, 1, $wgProxyMemcExpiry );
- }
- }
- }
+/**
+ * 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, $wgRequest;
+ global $wgProxyKey;
- /**
- * Convert a network specification in CIDR notation to an integer network and a number of bits
- */
- function parseCIDR( $range ) {
- $parts = explode( '/', $range, 2 );
- if ( count( $parts ) != 2 ) {
- return array( false, false );
- }
- $network = ProxyTools::IP2Unsigned( $parts[0] );
- if ( $network !== false && is_numeric( $parts[1] ) && $parts[1] >= 0 && $parts[1] <= 32 ) {
- $bits = $parts[1];
- } else {
- $network = false;
- $bits = false;
- }
- return array( $network, $bits );
+ if ( !$wgBlockOpenProxies ) {
+ return;
}
- /**
- * Check if an IP address is in the local proxy list
- */
- function isLocallyBlockedProxy( $ip ) {
- global $wgProxyList;
- $fname = 'ProxyTools::isLocallyBlockedProxy';
-
- if ( !$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;
+ $ip = $wgRequest->getIP();
+
+ # 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 = wfExpandUrl( $title->getFullURL( 'ip='.$iphash ), PROTO_HTTP );
+
+ foreach ( $wgProxyPorts as $port ) {
+ $params = implode( ' ', array(
+ escapeshellarg( $wgProxyScriptPath ),
+ escapeshellarg( $ip ),
+ escapeshellarg( $port ),
+ escapeshellarg( $url )
+ ));
+ exec( "php $params >" . wfGetNull() . " 2>&1 &" );
+ }
+ # Set MemCached key
+ $wgMemc->set( $mcKey, 1, $wgProxyMemcExpiry );
}
}
-?>
dépôts / lhc / web / wiklou.git / blobdiff