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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 Badcow\DNS\Parser\Tokens; |
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/** |
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* {@link https://tools.ietf.org/html/rfc7553}. |
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*/ |
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class URI implements RdataInterface |
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{ |
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use RdataTrait; |
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const TYPE = 'URI'; |
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const TYPE_CODE = 256; |
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const MAX_PRIORITY = 65535; |
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const MAX_WEIGHT = 65535; |
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/** |
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* This field holds the priority of the target URI in this RR. Its |
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* range is 0-65535. A client MUST attempt to contact the URI with the |
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* lowest-numbered priority it can reach; URIs with the same priority |
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* SHOULD be selected according to probabilities defined by the weight |
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* field. |
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* |
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* @var int |
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*/ |
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private $priority; |
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/** |
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* This field holds the server selection mechanism. The weight field |
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* specifies a relative weight for entries with the same priority. |
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* Larger weights SHOULD be given a proportionately higher probability |
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* of being selected. The range of this number is 0-65535. |
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* |
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* @var int |
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*/ |
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private $weight; |
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/** |
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* @var string |
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*/ |
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private $target; |
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/** |
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* @return int |
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*/ |
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public function getPriority(): ?int |
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{ |
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return $this->priority; |
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} |
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/** |
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* @param int $priority |
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* |
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* @throws \InvalidArgumentException |
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*/ |
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public function setPriority(int $priority): void |
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{ |
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if ($priority < 0 || $priority > static::MAX_PRIORITY) { |
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throw new \InvalidArgumentException('Priority must be an unsigned integer on the range [0-65535]'); |
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} |
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$this->priority = $priority; |
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} |
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/** |
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* @return int |
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*/ |
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public function getWeight(): ?int |
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{ |
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return $this->weight; |
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} |
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/** |
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* @param int $weight |
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* |
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* @throws \InvalidArgumentException |
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*/ |
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public function setWeight(int $weight): void |
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{ |
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if ($weight < 0 || $weight > static::MAX_WEIGHT) { |
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throw new \InvalidArgumentException('Weight must be an unsigned integer on the range [0-65535]'); |
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} |
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$this->weight = $weight; |
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} |
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/** |
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* @return string |
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*/ |
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public function getTarget(): ?string |
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{ |
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return $this->target; |
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} |
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/** |
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* @param string $target |
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*/ |
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public function setTarget(string $target): void |
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{ |
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if (false === filter_var($target, FILTER_VALIDATE_URL)) { |
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throw new \InvalidArgumentException(sprintf('The target "%s" is not a valid URI.', $target)); |
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} |
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$this->target = $target; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function toText(): string |
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{ |
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return sprintf('%d %d "%s"', |
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$this->priority, |
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$this->weight, |
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$this->target |
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); |
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} |
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public function toWire(): string |
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{ |
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return pack('nn', $this->priority, $this->weight).$this->target; |
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} |
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public static function fromText(string $text): RdataInterface |
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{ |
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$rdata = explode(Tokens::SPACE, $text); |
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$uri = new self(); |
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$uri->setPriority((int) array_shift($rdata)); |
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$uri->setWeight((int) array_shift($rdata)); |
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$target = implode(' ', $rdata); |
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$uri->setTarget(trim($target, '"')); |
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return $uri; |
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} |
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public static function fromWire(string $rdata): RdataInterface |
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{ |
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$integers = unpack('npriority/nweight', $rdata); |
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$uri = new self(); |
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$uri->setTarget(substr($rdata, 4)); |
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$uri->setPriority($integers['priority']); |
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$uri->setWeight($integers['weight']); |
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return $uri; |
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} |
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} |
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Badcow /
DNS
