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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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use Badcow\DNS\Validator; |
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/** |
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* {@link https://tools.ietf.org/html/rfc3403}. |
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*/ |
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class NAPTR implements RdataInterface |
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{ |
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use RdataTrait; |
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const TYPE = 'NAPTR'; |
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const TYPE_CODE = 35; |
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/** |
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* A 16-bit unsigned integer specifying the order in which the NAPTR |
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* records MUST be processed in order to accurately represent the |
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* ordered list of Rules. The ordering is from lowest to highest. |
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* If two records have the same order value then they are considered |
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* to be the same rule and should be selected based on the |
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* combination of the Preference values and Services offered. |
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* |
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* @var int|null |
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*/ |
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private $order; |
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/** |
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* It is a 16-bit unsigned integer that specifies the order in which |
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* NAPTR records with equal Order values SHOULD be processed, low |
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* numbers being processed before high numbers. |
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* |
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* @var int |
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*/ |
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private $preference; |
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/** |
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* A <character-string> containing flags to control aspects of the |
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* rewriting and interpretation of the fields in the record. Flags |
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* are single characters from the set A-Z and 0-9. The case of the |
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* alphabetic characters is not significant. The field can be empty. |
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* |
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* @var string|null |
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*/ |
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private $flags; |
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/** |
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* A <character-string> that specifies the Service Parameters |
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* applicable to this this delegation path. It is up to the |
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* Application Specification to specify the values found in this |
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* field. |
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* |
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* @var string|null |
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*/ |
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private $services; |
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/** |
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* A <character-string> containing a substitution expression that is |
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* applied to the original string held by the client in order to |
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* construct the next domain name to lookup. |
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* |
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* @var string|null |
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*/ |
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private $regexp; |
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/** |
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* A <domain-name> which is the next domain-name to query for |
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* depending on the potential values found in the flags field. This |
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* field is used when the regular expression is a simple replacement |
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* operation. Any value in this field MUST be a fully qualified |
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* domain-name. |
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* |
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* @var string |
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*/ |
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private $replacement; |
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/** |
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* @return int |
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*/ |
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4 |
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public function getOrder(): ?int |
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{ |
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return $this->order; |
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} |
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/** |
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* @param int $order |
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* |
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* @throws \InvalidArgumentException |
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*/ |
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public function setOrder(int $order): void |
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{ |
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if ($order < 0 || $order > 65535) { |
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throw new \InvalidArgumentException(sprintf('$order must be between 0 and 65535. "%d" given.', $order)); |
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} |
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$this->order = $order; |
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} |
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/** |
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* @return int |
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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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* @param int $preference |
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* |
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* @throws \InvalidArgumentException |
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*/ |
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public function setPreference(int $preference): void |
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{ |
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if ($preference < 0 || $preference > 65535) { |
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throw new \InvalidArgumentException(sprintf('$preference must be between 0 and 65535. "%d" given.', $preference)); |
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} |
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$this->preference = $preference; |
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} |
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/** |
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* @return string |
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*/ |
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public function getFlags(): ?string |
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{ |
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return $this->flags; |
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} |
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/** |
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* @param string $flags |
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*/ |
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public function setFlags(?string $flags): void |
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{ |
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$this->flags = $flags; |
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} |
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/** |
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* @return string |
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*/ |
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public function getServices(): ?string |
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{ |
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return $this->services; |
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} |
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/** |
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* @param string $services |
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*/ |
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public function setServices(?string $services): void |
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{ |
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$this->services = $services; |
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} |
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/** |
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* @return string |
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*/ |
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public function getRegexp(): ?string |
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{ |
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return $this->regexp; |
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} |
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/** |
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* @param string $regexp |
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*/ |
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public function setRegexp(?string $regexp): void |
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{ |
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$this->regexp = $regexp; |
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} |
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/** |
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* @return string |
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*/ |
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public function getReplacement(): ?string |
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{ |
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return $this->replacement; |
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} |
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/** |
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* @param string $replacement |
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*/ |
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public function setReplacement(string $replacement): void |
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{ |
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if (!Validator::fullyQualifiedDomainName($replacement)) { |
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throw new \InvalidArgumentException(sprintf('Replacement must be a fully qualified domain name. "%s" given.', $replacement)); |
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} |
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$this->replacement = $replacement; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function toText(): string |
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{ |
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return sprintf('%d %d "%s" "%s" "%s" %s', |
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$this->order, |
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$this->preference, |
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$this->flags ?? '', |
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$this->services ?? '', |
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$this->regexp, |
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$this->replacement |
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); |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function toWire(): string |
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{ |
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$encoded = pack('nn', $this->order, $this->preference); |
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$encoded .= sprintf('"%s""%s""%s"', $this->flags ?? '', $this->services ?? '', $this->regexp); |
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$encoded .= RdataTrait::encodeName($this->replacement); |
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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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* @return NAPTR |
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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, $text); |
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$naptr = new self(); |
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$naptr->setOrder((int) array_shift($rdata)); |
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$naptr->setPreference((int) array_shift($rdata)); |
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$naptr->setFlags(trim((string) array_shift($rdata), Tokens::DOUBLE_QUOTES)); |
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$naptr->setServices(trim((string) array_shift($rdata), Tokens::DOUBLE_QUOTES)); |
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$naptr->setRegexp(trim((string) array_shift($rdata), Tokens::DOUBLE_QUOTES)); |
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$naptr->setReplacement((string) array_shift($rdata)); |
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return $naptr; |
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} |
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/** |
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* {@inheritdoc} |
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* |
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* @return NAPTR |
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*/ |
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public static function fromWire(string $rdata): RdataInterface |
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{ |
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$naptr = new self(); |
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$integers = unpack('nOrder/nPreference', $rdata); |
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$naptr->setOrder($integers['Order']); |
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$naptr->setPreference($integers['Preference']); |
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$offset = 4; |
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$naptr->setFlags(self::extractText($rdata, $offset)); |
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$naptr->setServices(self::extractText($rdata, $offset)); |
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$naptr->setRegexp(self::extractText($rdata, $offset)); |
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$naptr->setReplacement(self::decodeName($rdata, $offset)); |
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return $naptr; |
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} |
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/** |
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* Extract text from within quotation marks and advance the offset. |
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* |
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* @param string $string |
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* @param int $offset |
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* |
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* @return string |
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*/ |
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private static function extractText(string $string, int &$offset): string |
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{ |
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if (Tokens::DOUBLE_QUOTES !== $char = substr($string, $offset, 1)) { |
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throw new \InvalidArgumentException(sprintf('The starting point of $string must be double quotes. "%s" given.', $char)); |
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} |
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$value = ''; |
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++$offset; |
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while (Tokens::DOUBLE_QUOTES !== $char = substr($string, $offset, 1)) { |
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$value .= $char; |
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++$offset; |
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} |
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++$offset; |
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return $value; |
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} |
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} |
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