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<?php |
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declare(strict_types=1); |
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/* |
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* This file is part of Badcow DNS Library. |
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* |
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* (c) Samuel Williams <[email protected]> |
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* |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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*/ |
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namespace Badcow\DNS\Rdata; |
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use PhpIP\IPBlock; |
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use PhpIP\IPv4Block; |
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use PhpIP\IPv6Block; |
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/** |
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* @see https://tools.ietf.org/html/rfc3123 |
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*/ |
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class APL implements RdataInterface |
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{ |
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use RdataTrait; |
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const TYPE = 'APL'; |
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const TYPE_CODE = 42; |
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/** |
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* @var IPBlock[] |
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*/ |
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private $includedAddressRanges = []; |
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/** |
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* @var IPBlock[] |
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*/ |
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private $excludedAddressRanges = []; |
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/** |
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* @param IPBlock $ipBlock |
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* @param bool $included True if the resource exists within the range, False if the resource |
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* is not within the range. I.E. the negation. |
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*/ |
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public function addAddressRange(IPBlock $ipBlock, $included = true): void |
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{ |
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if ($included) { |
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$this->includedAddressRanges[] = $ipBlock; |
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} else { |
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$this->excludedAddressRanges[] = $ipBlock; |
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} |
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} |
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/** |
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* @return IPBlock[] |
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*/ |
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public function getIncludedAddressRanges(): array |
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{ |
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return $this->includedAddressRanges; |
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} |
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/** |
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* @return IPBlock[] |
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*/ |
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public function getExcludedAddressRanges(): array |
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{ |
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return $this->excludedAddressRanges; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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2 |
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public function toText(): string |
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{ |
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$string = ''; |
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foreach ($this->includedAddressRanges as $ipBlock) { |
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$string .= (4 === $ipBlock->getVersion()) ? '1:' : '2:'; |
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$string .= (string) $ipBlock.' '; |
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} |
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foreach ($this->excludedAddressRanges as $ipBlock) { |
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$string .= (4 === $ipBlock->getVersion()) ? '!1:' : '!2:'; |
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$string .= (string) $ipBlock.' '; |
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} |
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return rtrim($string, ' '); |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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1 |
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public function toWire(): string |
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{ |
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$encoded = ''; |
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foreach ($this->includedAddressRanges as $ipBlock) { |
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$encoded .= pack('nCC', |
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(4 === $ipBlock->getVersion()) ? 1 : 2, |
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$ipBlock->getPrefix(), |
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$ipBlock->getGivenIp()::NB_BYTES |
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).inet_pton((string) $ipBlock->getGivenIp()); |
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} |
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foreach ($this->excludedAddressRanges as $ipBlock) { |
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$encoded .= pack('nCCC*', |
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(4 === $ipBlock->getVersion()) ? 1 : 2, |
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$ipBlock->getPrefix(), |
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$ipBlock->getGivenIp()::NB_BYTES | 0b10000000 |
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).inet_pton((string) $ipBlock->getGivenIp()); |
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} |
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return $encoded; |
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} |
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/** |
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* {@inheritdoc} |
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* |
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* @throws \Exception |
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*/ |
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public static function fromText(string $text): RdataInterface |
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{ |
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$iterator = new \ArrayIterator(explode(' ', $text)); |
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$apl = new self(); |
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while ($iterator->valid()) { |
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$matches = []; |
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if (1 !== preg_match('/^(?<negate>!)?[1-2]:(?<block>.+)$/i', $iterator->current(), $matches)) { |
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throw new \Exception(sprintf('"%s" is not a valid IP range.', $iterator->current())); |
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} |
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$ipBlock = IPBlock::create($matches['block']); |
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$apl->addAddressRange($ipBlock, '!' !== $matches['negate']); |
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$iterator->next(); |
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} |
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return $apl; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public static function fromWire(string $rdata): RdataInterface |
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{ |
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$apl = new self(); |
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$rdLength = strlen($rdata); |
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$offset = 0; |
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while ($offset < $rdLength) { |
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$apItem = unpack('nfamily/Cprefix/Clength', $rdata, $offset); |
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$isExcluded = (bool) ($apItem['length'] & 0b10000000); |
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$len = $apItem['length'] & 0b01111111; |
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$version = (1 === $apItem['family']) ? 4 : 6; |
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$offset += 4; |
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$address = substr($rdata, $offset, $len); |
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$address = inet_ntop($address); |
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$offset += $len; |
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$ipBlock = (4 === $version) ? new IPv4Block($address, $apItem['prefix']) : new IPv6Block($address, $apItem['prefix']); |
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$apl->addAddressRange($ipBlock, !$isExcluded); |
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} |
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return $apl; |
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} |
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} |
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Badcow /
DNS
