<?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];
}
/**
- * Locates the client IP within a given XFF string
- * @param string $xff
+ * Returns the browser/OS data from the request header
+ * Note: headers are spoofable
* @return string
*/
-function wfGetClientIPfromXFF( $xff ) {
- if ( !$xff ) return null;
- $xff = substr( $xff, 0, 511 );
- // Just look for the first IP match
- // We might have a mix of IPv4/IPv6
- if ( preg_match('#\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}|:(:[0-9A-Fa-f]{1,4}){1,7}|[0-9A-Fa-f]{1,4}(:{1,2}[0-9A-Fa-f]{1,4}|::$){1,7}#', $xff, $ip) ) {
- // Check if the numbers are valid
- if ( IP::isIPAddress($ip) )
- return $ip;
- }
-
- return null;
-}
-
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;
+ global $wgUsePrivateIPs, $wgCommandLineMode;
+ static $ip = false;
# Return cached result
- if ( !empty( $wgIP ) ) {
- return $wgIP;
+ if ( !empty( $ip ) ) {
+ return $ip;
}
+ $ipchain = array();
+
/* 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 = IP::canonicalize( $_SERVER['REMOTE_ADDR'] );
+ } elseif( $wgCommandLineMode ) {
+ $ip = '127.0.0.1';
+ }
+ if( $ip ) {
+ $ipchain[] = $ip;
}
- $ip = $ipchain[0];
# Append XFF on to $ipchain
$forwardedFor = wfGetForwardedFor();
$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] ) && IP::isPublic( $ipchain[$i + 1] ) ) {
- $ip = $ipchain[$i + 1];
+ if ( isset( $ipchain[$i + 1] ) ) {
+ if( $wgUsePrivateIPs || IP::isPublic( $ipchain[$i + 1 ] ) ) {
+ $ip = $ipchain[$i + 1];
+ }
}
} 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 $ip String
+ * @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 )
) {
$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 ) {
escapeshellarg( $port ),
escapeshellarg( $url )
));
- exec( "php $params &>/dev/null &" );
+ exec( "php $params >" . wfGetNull() . " 2>&1 &" );
}
# 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
+ *
+ * @deprecated Call IP::parseCIDR() directly, will be removed in 1.19
+ * @return array(string, int)
*/
function wfParseCIDR( $range ) {
+ wfDeprecated( __FUNCTION__ );
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 );
+ wfProfileIn( __METHOD__ );
if ( !is_array( $wgProxyList ) ) {
# Load from the specified file
} else {
$ret = false;
}
- wfProfileOut( $fname );
+ wfProfileOut( __METHOD__ );
return $ret;
}
-/**
- * TODO: move this list to the database in a global IP info table incorporating
- * trusted ISP proxies, blocked IP addresses and open proxies.
- */
-function wfIsAOLProxy( $ip ) {
- $ranges = array(
- '64.12.96.0/19',
- '149.174.160.0/20',
- '152.163.240.0/21',
- '152.163.248.0/22',
- '152.163.252.0/23',
- '152.163.96.0/22',
- '152.163.100.0/23',
- '195.93.32.0/22',
- '195.93.48.0/22',
- '195.93.64.0/19',
- '195.93.96.0/19',
- '195.93.16.0/20',
- '198.81.0.0/22',
- '198.81.16.0/20',
- '198.81.8.0/23',
- '202.67.64.128/25',
- '205.188.192.0/20',
- '205.188.208.0/23',
- '205.188.112.0/20',
- '205.188.146.144/30',
- '207.200.112.0/21',
- );
-
- static $parsedRanges;
- if ( is_null( $parsedRanges ) ) {
- $parsedRanges = array();
- foreach ( $ranges as $range ) {
- $parsedRanges[] = IP::parseRange( $range );
- }
- }
-
- $hex = IP::toHex( $ip );
- foreach ( $parsedRanges as $range ) {
- if ( $hex >= $range[0] && $hex <= $range[1] ) {
- return true;
- }
- }
- return false;
-}
-
-
-
-?>
dépôts / lhc / web / wiklou.git / blobdiff