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| |\/| | '__|> < | ___/ '__| \ \ / / _` | __/ _ \ \___ \| '_ \ / _ \ | |
| | | | |_ / . \ | | | | | |\ V / (_| | || __/ ____) | | | | __/ | |
|_| |_|_(_)_/ \_\ |_| |_| |_| \_/ \__,_|\__\___| |_____/|_| |_|\___V 2.1
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<?php
declare(strict_types=1);
/*
* This file is part of Badcow DNS Library.
*
* (c) Samuel Williams <sam@badcow.co>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Badcow\DNS\Edns\Option;
/**
* @see https://www.rfc-editor.org/rfc/rfc7828.html#section-3.1
*/
class TCP_KEEPALIVE implements OptionInterface
{
use OptionTrait;
public const NAME = 'TCP_KEEPALIVE';
public const CODE = 11;
/**
* @var int|null
*/
protected $timeout;
public function getTimeout(): ?int
{
return $this->timeout;
}
public function setTimeout(?int $timeout): void
{
$this->timeout = $timeout;
}
public function toWire(): string
{
if (null === $this->timeout) {
return '';
}
return pack('n', $this->timeout);
}
public function fromWire(string $optionValue, int &$offset = 0, ?int $optionLength = null): void
{
$optionLength = $optionLength ?? strlen($optionValue);
if (0 !== $optionLength and 2 !== $optionLength) {
throw new DecodeException(self::NAME, $optionValue);
}
if (2 === $optionLength) {
$integers = unpack('ntimeout', $optionValue, $offset);
if (false === $integers) {
throw new DecodeException(self::NAME, $optionValue);
}
$offset += 2;
$this->timeout = $integers['timeout'];
}
}
}