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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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/** |
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* @see https://tools.ietf.org/html/rfc1035#section-3.3.9 |
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*/ |
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class MX implements RdataInterface |
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{ |
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use RdataTrait; |
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const TYPE = 'MX'; |
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const TYPE_CODE = 15; |
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/** |
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* @var int|null |
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*/ |
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private $preference; |
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/** |
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* @var string|null |
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*/ |
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private $exchange; |
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/** |
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* @param string $exchange |
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*/ |
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public function setExchange(string $exchange): void |
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{ |
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$this->exchange = $exchange; |
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} |
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/** |
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* @return string|null |
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*/ |
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public function getExchange(): ?string |
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{ |
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return $this->exchange; |
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} |
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/** |
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* @param int $preference |
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*/ |
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public function setPreference(int $preference): void |
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{ |
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$this->preference = $preference; |
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} |
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/** |
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* @return int|null |
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*/ |
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public function getPreference(): ?int |
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{ |
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return $this->preference; |
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} |
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/** |
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* {@inheritdoc} |
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* |
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* @throws \InvalidArgumentException throws exception if preference or exchange have not been set |
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*/ |
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public function toText(): string |
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{ |
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if (null === $this->preference) { |
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throw new \InvalidArgumentException('No preference has been set on MX object.'); |
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} |
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if (null === $this->exchange) { |
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throw new \InvalidArgumentException('No exchange has been set on MX object.'); |
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} |
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return $this->preference.' '.$this->exchange; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function toWire(): string |
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{ |
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if (null === $this->preference) { |
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throw new \InvalidArgumentException('No preference has been set on MX object.'); |
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} |
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if (null === $this->exchange) { |
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throw new \InvalidArgumentException('No exchange has been set on MX object.'); |
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} |
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return pack('n', $this->preference).self::encodeName($this->exchange); |
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} |
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/** |
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* {@inheritdoc} |
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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(' ', $text); |
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$mx = new self(); |
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$mx->setPreference((int) $rdata[0]); |
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$mx->setExchange($rdata[1]); |
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return $mx; |
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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 $rdata): RdataInterface |
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{ |
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$offset = 2; |
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$mx = new self(); |
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$mx->setPreference(unpack('n', $rdata)[1]); |
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$mx->setExchange(self::decodeName($rdata, $offset)); |
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return $mx; |
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} |
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} |
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Badcow /
DNS
