113 lines
2 KiB
PHP
113 lines
2 KiB
PHP
<?php
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# Object for fast lookup of IP blocks
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# Represents a memcached value, and in some sense, the entire ipblocks table
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class BlockCache
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{
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var $mData = false, $mMemcKey;
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function BlockCache( $deferLoad = false, $dbName = "" )
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{
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global $wgDBname;
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if ( $dbName == "" ) {
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$dbName = $wgDBname;
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}
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$this->mMemcKey = "$dbName:ipblocks";
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if ( !$deferLoad ) {
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$this->load();
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}
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}
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function load()
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{
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global $wgUseMemCached, $wgMemc;
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if ( $this->mData === false) {
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$saveMemc = false;
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# Try memcached
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if ( $wgUseMemCached ) {
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$this->mData = $wgMemc->get( $this->mMemcKey );
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if ( !$this->mData ) {
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$saveMemc = true;
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}
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}
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if ( !is_array( $this->mData ) ) {
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# Load from DB
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$this->mData = array();
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Block::enumBlocks( "wfBlockCacheInsert", "" ); # Calls $this->insert()
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}
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if ( $saveMemc ) {
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$wgMemc->set( $this->mMemcKey, $this->mData, 0 );
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}
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}
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}
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function insert( &$block )
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{
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if ( $block->mUser == 0 ) {
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$nb = $block->getNetworkBits();
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$ipint = $block->getIntegerAddr();
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$index = $ipint >> ( 32 - $nb );
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if ( !array_key_exists( $nb, $this->mData ) ) {
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$this->mData[$nb] = array();
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}
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$this->mData[$nb][$index] = 1;
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}
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}
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function get( $ip )
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{
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$this->load();
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$ipint = ip2long( $ip );
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$blocked = false;
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foreach ( $this->mData as $networkBits => $blockInts ) {
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if ( array_key_exists( $ipint >> ( 32 - $networkBits ), $blockInts ) ) {
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$blocked = true;
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break;
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}
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}
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if ( $blocked ) {
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# Clear low order bits
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if ( $networkBits != 32 ) {
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$ip .= "/$networkBits";
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$ip = Block::normaliseRange( $ip );
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}
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$block = new Block();
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$block->load( $ip );
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} else {
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$block = false;
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}
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return $block;
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}
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function clear()
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{
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global $wgUseMemCached, $wgMemc;
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$this->mData = false;
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if ( $wgUseMemCached ) {
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$wgMemc->delete( $this->mMemcKey );
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}
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}
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function clearLocal()
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{
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$this->mData = false;
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}
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}
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function wfBlockCacheInsert( $block, $tag )
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{
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global $wgBlockCache;
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$wgBlockCache->insert( $block );
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}
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