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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\StringIterator; |
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use Badcow\DNS\Parser\Tokens; |
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/** |
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* @see https://tools.ietf.org/html/rfc1035#section-3.3.14 |
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*/ |
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class TXT implements RdataInterface |
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{ |
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use RdataTrait; |
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const TYPE = 'TXT'; |
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const TYPE_CODE = 16; |
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/** |
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* @var string|null |
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*/ |
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private $text; |
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/** |
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* @param string|null $text |
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*/ |
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public function setText(?string $text): void |
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{ |
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if (null === $text) { |
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$this->text = null; |
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return; |
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} |
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$this->text = stripslashes($text); |
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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 getText(): ?string |
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{ |
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return (string) $this->text ?? ''; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function toText(): string |
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{ |
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return sprintf('"%s"', addslashes($this->text ?? '')); |
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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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return $this->text ?? ''; |
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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 $rdata, int &$offset = 0, ?int $rdLength = null): RdataInterface |
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{ |
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$rdLength = $rdLength ?? strlen($rdata); |
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$txt = new static(); |
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$txt->setText(substr($rdata, $offset, $rdLength)); |
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$offset += $rdLength; |
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return $txt; |
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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 $text): RdataInterface |
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{ |
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$string = new StringIterator($text); |
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$txt = new StringIterator(); |
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while ($string->valid()) { |
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self::handleTxt($string, $txt); |
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$string->next(); |
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} |
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$rdata = new static(); |
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$rdata->setText((string) $txt); |
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return $rdata; |
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} |
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/** |
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* @param StringIterator $string |
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* @param StringIterator $txt |
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*/ |
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public static function handleTxt(StringIterator $string, StringIterator $txt): void |
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{ |
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if ($string->isNot(Tokens::DOUBLE_QUOTES)) { |
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return; |
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} |
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$string->next(); |
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while ($string->isNot(Tokens::DOUBLE_QUOTES) && $string->valid()) { |
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if ($string->is(Tokens::BACKSLASH)) { |
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$string->next(); |
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} |
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$txt->append($string->current()); |
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$string->next(); |
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} |
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} |
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} |
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Badcow /
DNS
