702 lines
18 KiB
PHP
702 lines
18 KiB
PHP
<?php
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/**
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* Blocks and bans object
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*/
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/**
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* The block class
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* All the functions in this class assume the object is either explicitly
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* loaded or filled. It is not load-on-demand. There are no accessors.
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*
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* Globals used: $wgAutoblockExpiry, $wgAntiLockFlags
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*
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* @todo This could be used everywhere, but it isn't.
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*/
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class Block
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{
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/* public*/ var $mAddress, $mUser, $mBy, $mReason, $mTimestamp, $mAuto, $mId, $mExpiry,
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$mRangeStart, $mRangeEnd, $mAnonOnly, $mEnableAutoblock, $mHideName,
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$mBlockEmail;
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/* private */ var $mNetworkBits, $mIntegerAddr, $mForUpdate, $mFromMaster, $mByName;
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const EB_KEEP_EXPIRED = 1;
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const EB_FOR_UPDATE = 2;
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const EB_RANGE_ONLY = 4;
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function __construct( $address = '', $user = 0, $by = 0, $reason = '',
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$timestamp = '' , $auto = 0, $expiry = '', $anonOnly = 0, $createAccount = 0, $enableAutoblock = 0,
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$hideName = 0, $blockEmail = 0 )
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{
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$this->mId = 0;
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# Expand valid IPv6 addresses
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$address = IP::sanitizeIP( $address );
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$this->mAddress = $address;
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$this->mUser = $user;
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$this->mBy = $by;
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$this->mReason = $reason;
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$this->mTimestamp = wfTimestamp(TS_MW,$timestamp);
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$this->mAuto = $auto;
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$this->mAnonOnly = $anonOnly;
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$this->mCreateAccount = $createAccount;
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$this->mExpiry = self::decodeExpiry( $expiry );
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$this->mEnableAutoblock = $enableAutoblock;
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$this->mHideName = $hideName;
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$this->mBlockEmail = $blockEmail;
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$this->mForUpdate = false;
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$this->mFromMaster = false;
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$this->mByName = false;
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$this->initialiseRange();
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}
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static function newFromDB( $address, $user = 0, $killExpired = true )
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{
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$block = new Block();
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$block->load( $address, $user, $killExpired );
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if ( $block->isValid() ) {
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return $block;
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} else {
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return null;
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}
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}
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static function newFromID( $id )
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{
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$dbr = wfGetDB( DB_SLAVE );
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$res = $dbr->resultObject( $dbr->select( 'ipblocks', '*',
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array( 'ipb_id' => $id ), __METHOD__ ) );
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$block = new Block;
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if ( $block->loadFromResult( $res ) ) {
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return $block;
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} else {
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return null;
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}
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}
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function clear()
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{
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$this->mAddress = $this->mReason = $this->mTimestamp = '';
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$this->mId = $this->mAnonOnly = $this->mCreateAccount =
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$this->mEnableAutoblock = $this->mAuto = $this->mUser =
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$this->mBy = $this->mHideName = $this->mBlockEmail = 0;
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$this->mByName = false;
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}
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/**
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* Get the DB object and set the reference parameter to the query options
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*/
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function &getDBOptions( &$options )
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{
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global $wgAntiLockFlags;
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if ( $this->mForUpdate || $this->mFromMaster ) {
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$db = wfGetDB( DB_MASTER );
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if ( !$this->mForUpdate || ($wgAntiLockFlags & ALF_NO_BLOCK_LOCK) ) {
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$options = array();
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} else {
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$options = array( 'FOR UPDATE' );
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}
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} else {
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$db = wfGetDB( DB_SLAVE );
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$options = array();
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}
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return $db;
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}
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/**
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* Get a ban from the DB, with either the given address or the given username
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*
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* @param string $address The IP address of the user, or blank to skip IP blocks
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* @param integer $user The user ID, or zero for anonymous users
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* @param bool $killExpired Whether to delete expired rows while loading
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*
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*/
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function load( $address = '', $user = 0, $killExpired = true )
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{
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wfDebug( "Block::load: '$address', '$user', $killExpired\n" );
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$options = array();
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$db =& $this->getDBOptions( $options );
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if ( 0 == $user && $address == '' ) {
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# Invalid user specification, not blocked
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$this->clear();
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return false;
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}
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# Try user block
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if ( $user ) {
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$res = $db->resultObject( $db->select( 'ipblocks', '*', array( 'ipb_user' => $user ),
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__METHOD__, $options ) );
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if ( $this->loadFromResult( $res, $killExpired ) ) {
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return true;
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}
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}
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# Try IP block
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# TODO: improve performance by merging this query with the autoblock one
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# Slightly tricky while handling killExpired as well
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if ( $address ) {
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$conds = array( 'ipb_address' => $address, 'ipb_auto' => 0 );
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$res = $db->resultObject( $db->select( 'ipblocks', '*', $conds, __METHOD__, $options ) );
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if ( $this->loadFromResult( $res, $killExpired ) ) {
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if ( $user && $this->mAnonOnly ) {
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# Block is marked anon-only
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# Whitelist this IP address against autoblocks and range blocks
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$this->clear();
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return false;
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} else {
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return true;
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}
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}
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}
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# Try range block
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if ( $this->loadRange( $address, $killExpired, $user ) ) {
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if ( $user && $this->mAnonOnly ) {
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$this->clear();
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return false;
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} else {
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return true;
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}
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}
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# Try autoblock
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if ( $address ) {
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$conds = array( 'ipb_address' => $address, 'ipb_auto' => 1 );
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if ( $user ) {
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$conds['ipb_anon_only'] = 0;
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}
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$res = $db->resultObject( $db->select( 'ipblocks', '*', $conds, __METHOD__, $options ) );
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if ( $this->loadFromResult( $res, $killExpired ) ) {
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return true;
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}
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}
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# Give up
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$this->clear();
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return false;
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}
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/**
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* Fill in member variables from a result wrapper
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*/
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function loadFromResult( ResultWrapper $res, $killExpired = true )
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{
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$ret = false;
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if ( 0 != $res->numRows() ) {
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# Get first block
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$row = $res->fetchObject();
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$this->initFromRow( $row );
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if ( $killExpired ) {
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# If requested, delete expired rows
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do {
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$killed = $this->deleteIfExpired();
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if ( $killed ) {
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$row = $res->fetchObject();
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if ( $row ) {
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$this->initFromRow( $row );
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}
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}
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} while ( $killed && $row );
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# If there were any left after the killing finished, return true
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if ( $row ) {
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$ret = true;
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}
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} else {
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$ret = true;
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}
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}
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$res->free();
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return $ret;
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}
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/**
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* Search the database for any range blocks matching the given address, and
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* load the row if one is found.
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*/
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function loadRange( $address, $killExpired = true, $user = 0 )
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{
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$iaddr = IP::toHex( $address );
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if ( $iaddr === false ) {
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# Invalid address
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return false;
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}
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# Only scan ranges which start in this /16, this improves search speed
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# Blocks should not cross a /16 boundary.
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$range = substr( $iaddr, 0, 4 );
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$options = array();
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$db =& $this->getDBOptions( $options );
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$conds = array(
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"ipb_range_start LIKE '$range%'",
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"ipb_range_start <= '$iaddr'",
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"ipb_range_end >= '$iaddr'"
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);
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if ( $user ) {
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$conds['ipb_anon_only'] = 0;
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}
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$res = $db->resultObject( $db->select( 'ipblocks', '*', $conds, __METHOD__, $options ) );
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$success = $this->loadFromResult( $res, $killExpired );
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return $success;
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}
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/**
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* Determine if a given integer IPv4 address is in a given CIDR network
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* @deprecated Use IP::isInRange
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*/
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function isAddressInRange( $addr, $range ) {
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return IP::isInRange( $addr, $range );
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}
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function initFromRow( $row )
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{
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$this->mAddress = $row->ipb_address;
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$this->mReason = $row->ipb_reason;
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$this->mTimestamp = wfTimestamp(TS_MW,$row->ipb_timestamp);
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$this->mUser = $row->ipb_user;
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$this->mBy = $row->ipb_by;
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$this->mAuto = $row->ipb_auto;
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$this->mAnonOnly = $row->ipb_anon_only;
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$this->mCreateAccount = $row->ipb_create_account;
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$this->mEnableAutoblock = $row->ipb_enable_autoblock;
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$this->mBlockEmail = $row->ipb_block_email;
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$this->mHideName = $row->ipb_deleted;
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$this->mId = $row->ipb_id;
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$this->mExpiry = self::decodeExpiry( $row->ipb_expiry );
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if ( isset( $row->user_name ) ) {
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$this->mByName = $row->user_name;
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} else {
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$this->mByName = false;
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}
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$this->mRangeStart = $row->ipb_range_start;
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$this->mRangeEnd = $row->ipb_range_end;
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}
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function initialiseRange()
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{
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$this->mRangeStart = '';
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$this->mRangeEnd = '';
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if ( $this->mUser == 0 ) {
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list( $this->mRangeStart, $this->mRangeEnd ) = IP::parseRange( $this->mAddress );
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}
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}
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/**
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* Callback with a Block object for every block
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* @return integer number of blocks;
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*/
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/*static*/ function enumBlocks( $callback, $tag, $flags = 0 )
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{
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global $wgAntiLockFlags;
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$block = new Block();
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if ( $flags & Block::EB_FOR_UPDATE ) {
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$db = wfGetDB( DB_MASTER );
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if ( $wgAntiLockFlags & ALF_NO_BLOCK_LOCK ) {
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$options = '';
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} else {
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$options = 'FOR UPDATE';
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}
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$block->forUpdate( true );
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} else {
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$db = wfGetDB( DB_SLAVE );
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$options = '';
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}
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if ( $flags & Block::EB_RANGE_ONLY ) {
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$cond = " AND ipb_range_start <> ''";
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} else {
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$cond = '';
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}
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$now = wfTimestampNow();
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list( $ipblocks, $user ) = $db->tableNamesN( 'ipblocks', 'user' );
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$sql = "SELECT $ipblocks.*,user_name FROM $ipblocks,$user " .
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"WHERE user_id=ipb_by $cond ORDER BY ipb_timestamp DESC $options";
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$res = $db->query( $sql, 'Block::enumBlocks' );
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$num_rows = $db->numRows( $res );
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while ( $row = $db->fetchObject( $res ) ) {
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$block->initFromRow( $row );
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if ( ( $flags & Block::EB_RANGE_ONLY ) && $block->mRangeStart == '' ) {
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continue;
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}
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if ( !( $flags & Block::EB_KEEP_EXPIRED ) ) {
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if ( $block->mExpiry && $now > $block->mExpiry ) {
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$block->delete();
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} else {
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call_user_func( $callback, $block, $tag );
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}
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} else {
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call_user_func( $callback, $block, $tag );
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}
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}
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$db->freeResult( $res );
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return $num_rows;
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}
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function delete()
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{
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if (wfReadOnly()) {
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return false;
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}
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if ( !$this->mId ) {
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throw new MWException( "Block::delete() now requires that the mId member be filled\n" );
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}
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$dbw = wfGetDB( DB_MASTER );
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$dbw->delete( 'ipblocks', array( 'ipb_id' => $this->mId ), __METHOD__ );
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return $dbw->affectedRows() > 0;
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}
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/**
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* Insert a block into the block table.
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*@return Whether or not the insertion was successful.
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*/
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function insert()
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{
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wfDebug( "Block::insert; timestamp {$this->mTimestamp}\n" );
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$dbw = wfGetDB( DB_MASTER );
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# Unset ipb_anon_only for user blocks, makes no sense
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if ( $this->mUser ) {
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$this->mAnonOnly = 0;
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}
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# Unset ipb_enable_autoblock for IP blocks, makes no sense
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if ( !$this->mUser ) {
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$this->mEnableAutoblock = 0;
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$this->mBlockEmail = 0; //Same goes for email...
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}
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# Don't collide with expired blocks
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Block::purgeExpired();
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$ipb_id = $dbw->nextSequenceValue('ipblocks_ipb_id_val');
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$dbw->insert( 'ipblocks',
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array(
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'ipb_id' => $ipb_id,
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'ipb_address' => $this->mAddress,
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'ipb_user' => $this->mUser,
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'ipb_by' => $this->mBy,
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'ipb_reason' => $this->mReason,
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'ipb_timestamp' => $dbw->timestamp($this->mTimestamp),
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'ipb_auto' => $this->mAuto,
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'ipb_anon_only' => $this->mAnonOnly,
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'ipb_create_account' => $this->mCreateAccount,
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'ipb_enable_autoblock' => $this->mEnableAutoblock,
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'ipb_expiry' => self::encodeExpiry( $this->mExpiry, $dbw ),
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'ipb_range_start' => $this->mRangeStart,
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'ipb_range_end' => $this->mRangeEnd,
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'ipb_deleted' => $this->mHideName,
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'ipb_block_email' => $this->mBlockEmail
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), 'Block::insert', array( 'IGNORE' )
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);
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$affected = $dbw->affectedRows();
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$dbw->commit();
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if ($affected)
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$this->doRetroactiveAutoblock();
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return $affected;
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}
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/**
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* Retroactively autoblocks the last IP used by the user (if it is a user)
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* blocked by this Block.
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*@return Whether or not a retroactive autoblock was made.
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*/
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function doRetroactiveAutoblock() {
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$dbr = wfGetDB( DB_SLAVE );
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#If autoblock is enabled, autoblock the LAST IP used
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# - stolen shamelessly from CheckUser_body.php
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if ($this->mEnableAutoblock && $this->mUser) {
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wfDebug("Doing retroactive autoblocks for " . $this->mAddress . "\n");
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$row = $dbr->selectRow( 'recentchanges', array( 'rc_ip' ), array( 'rc_user_text' => $this->mAddress ),
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__METHOD__ , array( 'ORDER BY' => 'rc_timestamp DESC' ) );
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if ( !$row || !$row->rc_ip ) {
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#No results, don't autoblock anything
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wfDebug("No IP found to retroactively autoblock\n");
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} else {
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#Limit is 1, so no loop needed.
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$retroblockip = $row->rc_ip;
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return $this->doAutoblock( $retroblockip, true );
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}
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}
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}
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/**
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* Autoblocks the given IP, referring to this Block.
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* @param string $autoblockip The IP to autoblock.
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* @param bool $justInserted The main block was just inserted
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* @return bool Whether or not an autoblock was inserted.
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*/
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function doAutoblock( $autoblockip, $justInserted = false ) {
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# If autoblocks are disabled, go away.
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if ( !$this->mEnableAutoblock ) {
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return;
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}
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# Check for presence on the autoblock whitelist
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# TODO cache this?
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$lines = explode( "\n", wfMsgForContentNoTrans( 'autoblock_whitelist' ) );
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$ip = $autoblockip;
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wfDebug("Checking the autoblock whitelist..\n");
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foreach( $lines as $line ) {
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# List items only
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if ( substr( $line, 0, 1 ) !== '*' ) {
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continue;
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}
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$wlEntry = substr($line, 1);
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$wlEntry = trim($wlEntry);
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wfDebug("Checking $ip against $wlEntry...");
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# Is the IP in this range?
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if (IP::isInRange( $ip, $wlEntry )) {
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wfDebug(" IP $ip matches $wlEntry, not autoblocking\n");
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#$autoblockip = null; # Don't autoblock a whitelisted IP.
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return; #This /SHOULD/ introduce a dummy block - but
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# I don't know a safe way to do so. -werdna
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} else {
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wfDebug( " No match\n" );
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}
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}
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# It's okay to autoblock. Go ahead and create/insert the block.
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$ipblock = Block::newFromDB( $autoblockip );
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if ( $ipblock ) {
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# If the user is already blocked. Then check if the autoblock would
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# exceed the user block. If it would exceed, then do nothing, else
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# prolong block time
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if ($this->mExpiry &&
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($this->mExpiry < Block::getAutoblockExpiry($ipblock->mTimestamp))) {
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return;
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}
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# Just update the timestamp
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if ( !$justInserted ) {
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$ipblock->updateTimestamp();
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}
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return;
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} else {
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$ipblock = new Block;
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}
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# Make a new block object with the desired properties
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wfDebug( "Autoblocking {$this->mAddress}@" . $autoblockip . "\n" );
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$ipblock->mAddress = $autoblockip;
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$ipblock->mUser = 0;
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$ipblock->mBy = $this->mBy;
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$ipblock->mReason = wfMsgForContent( 'autoblocker', $this->mAddress, $this->mReason );
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$ipblock->mTimestamp = wfTimestampNow();
|
|
$ipblock->mAuto = 1;
|
|
$ipblock->mCreateAccount = $this->mCreateAccount;
|
|
# Continue suppressing the name if needed
|
|
$ipblock->mHideName = $this->mHideName;
|
|
|
|
# If the user is already blocked with an expiry date, we don't
|
|
# want to pile on top of that!
|
|
if($this->mExpiry) {
|
|
$ipblock->mExpiry = min ( $this->mExpiry, Block::getAutoblockExpiry( $this->mTimestamp ));
|
|
} else {
|
|
$ipblock->mExpiry = Block::getAutoblockExpiry( $this->mTimestamp );
|
|
}
|
|
# Insert it
|
|
return $ipblock->insert();
|
|
}
|
|
|
|
function deleteIfExpired()
|
|
{
|
|
$fname = 'Block::deleteIfExpired';
|
|
wfProfileIn( $fname );
|
|
if ( $this->isExpired() ) {
|
|
wfDebug( "Block::deleteIfExpired() -- deleting\n" );
|
|
$this->delete();
|
|
$retVal = true;
|
|
} else {
|
|
wfDebug( "Block::deleteIfExpired() -- not expired\n" );
|
|
$retVal = false;
|
|
}
|
|
wfProfileOut( $fname );
|
|
return $retVal;
|
|
}
|
|
|
|
function isExpired()
|
|
{
|
|
wfDebug( "Block::isExpired() checking current " . wfTimestampNow() . " vs $this->mExpiry\n" );
|
|
if ( !$this->mExpiry ) {
|
|
return false;
|
|
} else {
|
|
return wfTimestampNow() > $this->mExpiry;
|
|
}
|
|
}
|
|
|
|
function isValid()
|
|
{
|
|
return $this->mAddress != '';
|
|
}
|
|
|
|
function updateTimestamp()
|
|
{
|
|
if ( $this->mAuto ) {
|
|
$this->mTimestamp = wfTimestamp();
|
|
$this->mExpiry = Block::getAutoblockExpiry( $this->mTimestamp );
|
|
|
|
$dbw = wfGetDB( DB_MASTER );
|
|
$dbw->update( 'ipblocks',
|
|
array( /* SET */
|
|
'ipb_timestamp' => $dbw->timestamp($this->mTimestamp),
|
|
'ipb_expiry' => $dbw->timestamp($this->mExpiry),
|
|
), array( /* WHERE */
|
|
'ipb_address' => $this->mAddress
|
|
), 'Block::updateTimestamp'
|
|
);
|
|
}
|
|
}
|
|
|
|
/*
|
|
function getIntegerAddr()
|
|
{
|
|
return $this->mIntegerAddr;
|
|
}
|
|
|
|
function getNetworkBits()
|
|
{
|
|
return $this->mNetworkBits;
|
|
}*/
|
|
|
|
/**
|
|
* @return The blocker user ID.
|
|
*/
|
|
public function getBy() {
|
|
return $this->mBy;
|
|
}
|
|
|
|
/**
|
|
* @return The blocker user name.
|
|
*/
|
|
function getByName()
|
|
{
|
|
if ( $this->mByName === false ) {
|
|
$this->mByName = User::whoIs( $this->mBy );
|
|
}
|
|
return $this->mByName;
|
|
}
|
|
|
|
function forUpdate( $x = NULL ) {
|
|
return wfSetVar( $this->mForUpdate, $x );
|
|
}
|
|
|
|
function fromMaster( $x = NULL ) {
|
|
return wfSetVar( $this->mFromMaster, $x );
|
|
}
|
|
|
|
function getRedactedName() {
|
|
if ( $this->mAuto ) {
|
|
return '#' . $this->mId;
|
|
} else {
|
|
return $this->mAddress;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Encode expiry for DB
|
|
*/
|
|
static function encodeExpiry( $expiry, $db ) {
|
|
if ( $expiry == '' || $expiry == Block::infinity() ) {
|
|
return Block::infinity();
|
|
} else {
|
|
return $db->timestamp( $expiry );
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Decode expiry which has come from the DB
|
|
*/
|
|
static function decodeExpiry( $expiry, $timestampType = TS_MW ) {
|
|
if ( $expiry == '' || $expiry == Block::infinity() ) {
|
|
return Block::infinity();
|
|
} else {
|
|
return wfTimestamp( $timestampType, $expiry );
|
|
}
|
|
}
|
|
|
|
static function getAutoblockExpiry( $timestamp )
|
|
{
|
|
global $wgAutoblockExpiry;
|
|
return wfTimestamp( TS_MW, wfTimestamp( TS_UNIX, $timestamp ) + $wgAutoblockExpiry );
|
|
}
|
|
|
|
/**
|
|
* Gets rid of uneeded numbers in quad-dotted/octet IP strings
|
|
* For example, 127.111.113.151/24 -> 127.111.113.0/24
|
|
*/
|
|
static function normaliseRange( $range ) {
|
|
$parts = explode( '/', $range );
|
|
if ( count( $parts ) == 2 ) {
|
|
// IPv6
|
|
if ( IP::isIPv6($range) && $parts[1] >= 64 && $parts[1] <= 128 ) {
|
|
$bits = $parts[1];
|
|
$ipint = IP::toUnsigned6( $parts[0] );
|
|
# Native 32 bit functions WONT work here!!!
|
|
# Convert to a padded binary number
|
|
$network = wfBaseConvert( $ipint, 10, 2, 128 );
|
|
# Truncate the last (128-$bits) bits and replace them with zeros
|
|
$network = str_pad( substr( $network, 0, $bits ), 128, 0, STR_PAD_RIGHT );
|
|
# Convert back to an integer
|
|
$network = wfBaseConvert( $network, 2, 10 );
|
|
# Reform octet address
|
|
$newip = IP::toOctet( $network );
|
|
$range = "$newip/{$parts[1]}";
|
|
} // IPv4
|
|
else if ( IP::isIPv4($range) && $parts[1] >= 16 && $parts[1] <= 32 ) {
|
|
$shift = 32 - $parts[1];
|
|
$ipint = IP::toUnsigned( $parts[0] );
|
|
$ipint = $ipint >> $shift << $shift;
|
|
$newip = long2ip( $ipint );
|
|
$range = "$newip/{$parts[1]}";
|
|
}
|
|
}
|
|
return $range;
|
|
}
|
|
|
|
/**
|
|
* Purge expired blocks from the ipblocks table
|
|
*/
|
|
static function purgeExpired() {
|
|
$dbw = wfGetDB( DB_MASTER );
|
|
$dbw->delete( 'ipblocks', array( 'ipb_expiry < ' . $dbw->addQuotes( $dbw->timestamp() ) ), __METHOD__ );
|
|
}
|
|
|
|
static function infinity() {
|
|
# This is a special keyword for timestamps in PostgreSQL, and
|
|
# works with CHAR(14) as well because "i" sorts after all numbers.
|
|
return 'infinity';
|
|
|
|
/*
|
|
static $infinity;
|
|
if ( !isset( $infinity ) ) {
|
|
$dbr = wfGetDB( DB_SLAVE );
|
|
$infinity = $dbr->bigTimestamp();
|
|
}
|
|
return $infinity;
|
|
*/
|
|
}
|
|
|
|
}
|
|
|