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<?php
namespace MediaWiki\Block;
use MediaWiki\DAO\WikiAwareEntity;
use MediaWiki\Page\PageReference;
use MediaWiki\Page\PageReferenceValue;
use StatusValue;
use Wikimedia\IPUtils;
/**
* A block target for an IP address range
*
* @since 1.44
*/
class RangeBlockTarget extends BlockTarget implements BlockTargetWithIp {
private string $cidr;
/**
* @var array The minimum prefix lengths indexed by protocol (IPv4 or IPv6)
*/
private array $limits;
/**
* @param string $cidr The range specification in CIDR notation
* @param array $limits The minimum prefix lengths indexed by protocol (IPv4 or IPv6)
* @param string|false $wikiId The wiki ID
*/
public function __construct( string $cidr, array $limits, $wikiId = WikiAwareEntity::LOCAL ) {
parent::__construct( $wikiId );
$this->cidr = $cidr;
$this->limits = $limits;
}
public function toString(): string {
return $this->cidr;
}
public function getType(): int {
return Block::TYPE_RANGE;
}
public function getLogPage(): PageReference {
return new PageReferenceValue( NS_USER, $this->cidr, $this->wikiId );
}
public function getSpecificity() {
// This is the number of bits that are allowed to vary in the block, give
// or take some floating point errors
[ $ip, $bits ] = explode( '/', $this->cidr, 2 );
$max = IPUtils::isIPv6( $ip ) ? 128 : 32;
$size = $max - (int)$bits;
// Rank a range block covering a single IP equally with a single-IP block
return 2 + ( $size / $max );
}
public function validateForCreation(): StatusValue {
$status = StatusValue::newGood();
[ $ip, $prefixLength ] = explode( '/', $this->cidr, 2 );
if ( IPUtils::isIPv4( $ip ) ) {
$minLength = $this->limits['IPv4'];
$totalLength = 32;
} elseif ( IPUtils::isIPv6( $ip ) ) {
$minLength = $this->limits['IPv6'];
$totalLength = 128;
} else {
// The factory should not have called the constructor with an invalid range
throw new \RuntimeException( 'invalid IP range' );
}
if ( $minLength == $totalLength ) {
// Range block effectively disabled
$status->fatal( 'range_block_disabled' );
} elseif ( $prefixLength > $totalLength ) {
// Such a range cannot exist
$status->fatal( 'ip_range_invalid' );
} elseif ( $prefixLength < $minLength ) {
$status->fatal( 'ip_range_toolarge', $minLength );
}
return $status;
}
public function toHexRange() {
$range = IPUtils::parseRange( $this->cidr );
if ( count( $range ) !== 2 || !is_string( $range[0] ) || !is_string( $range[1] ) ) {
throw new \RuntimeException(
'Failed to parse range: constructor caller should have validated it' );
}
return $range;
}
/**
* Get the start of the range in hexadecimal form.
*
* @return string
*/
public function getHexRangeStart(): string {
return $this->toHexRange()[0];
}
/**
* Get the end of the range in hexadecimal form.
*
* @return string
*/
public function getHexRangeEnd(): string {
return $this->toHexRange()[1];
}
protected function getLegacyUnion() {
return $this->cidr;
}
}