<?php
+/**
+ * Functions for dealing with proxies
+ *
+ * @file
+ */
-if ( !defined( 'MEDIAWIKI' ) ) {
- die();
+/**
+ * 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' );
}
/**
- * Functions for dealing with proxies
+ * 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' );
+}
/**
* 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()
-{
- global $wgSquidServers, $wgSquidServersNoPurge;
-
- /* 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
- if ( isset( $_SERVER['HTTP_X_FORWARDED_FOR'] ) ) {
- $ipchain = array_merge( $ipchain, array_map( 'trim', explode( ',', $_SERVER['HTTP_X_FORWARDED_FOR'] ) ) );
- }
- # 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] ) && wfIsIPPublic( $ipchain[$i + 1] ) ) {
- $ip = $ipchain[$i + 1];
- }
- } else {
- break;
- }
- }
- }
+function wfGetIP() {
+ wfDeprecated( __METHOD__, '1.19' );
+ global $wgRequest;
+ return $wgRequest->getIP();
+}
- 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 are whitelisted.
+ *
+ * @param $ip String
+ * @return bool
+ */
+function wfIsTrustedProxy( $ip ) {
+ $trusted = wfIsConfiguredProxy( $ip );
+ wfRunHooks( 'IsTrustedProxy', array( &$ip, &$trusted ) );
+ return $trusted;
}
-function wfIP2Unsigned( $ip )
-{
- $n = ip2long( $ip );
- if ( $n == -1 ) {
- $n = false;
- } elseif ( $n < 0 ) {
- $n += pow( 2, 32 );
- }
- return $n;
+/**
+ * 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;
}
/**
- * Determine if an IP address really is an IP address, and if it is public,
- * i.e. not RFC 1918 or similar
+ * 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 wfIsIPPublic( $ip )
-{
- $n = wfIP2Unsigned( $ip );
- if ( !$n ) {
- return false;
- }
+function wfProxyCheck() {
+ global $wgBlockOpenProxies, $wgProxyPorts, $wgProxyScriptPath;
+ global $wgMemc, $wgProxyMemcExpiry, $wgRequest;
+ global $wgProxyKey;
- static $privateRanges = false;
- if ( !$privateRanges ) {
- $privateRanges = array(
- array( '10.0.0.0', '10.255.255.255' ), # RFC 1918 (private)
- array( '172.16.0.0', '172.31.255.255' ), # "
- array( '192.168.0.0', '192.168.255.255' ), # "
- array( '0.0.0.0', '0.255.255.255' ), # this network
- array( '127.0.0.0', '127.255.255.255' ), # loopback
- );
+ if ( !$wgBlockOpenProxies ) {
+ return;
}
- foreach ( $privateRanges as $r ) {
- $start = wfIP2Unsigned( $r[0] );
- $end = wfIP2Unsigned( $r[1] );
- if ( $n >= $start && $n <= $end ) {
- return false;
+ $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 );
}
- return true;
}
-
-?>
dépôts / lhc / web / wiklou.git / blobdiff