__ __ __ __ _____ _ _ _____ _ _ _
| \/ | \ \ / / | __ \ (_) | | / ____| | | | |
| \ / |_ __\ V / | |__) | __ ___ ____ _| |_ ___ | (___ | |__ ___| | |
| |\/| | '__|> < | ___/ '__| \ \ / / _` | __/ _ \ \___ \| '_ \ / _ \ | |
| | | | |_ / . \ | | | | | |\ 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;
class Codes
{
public const LLQ = 1;
public const UL = 2;
public const NSID = 3;
public const DAU = 5;
public const DHU = 6;
public const N3U = 7;
public const CLIENT_SUBNET = 8;
public const EXPIRE = 9;
public const COOKIE = 10;
public const TCP_KEEPALIVE = 11;
public const PADDING = 12;
public const CHAIN = 13;
public const KEY_CHAIN = 14;
public const DNS_ERROR = 15;
public const CLIENT_TAG = 16;
public const SERVER_TAG = 17;
/**
* @var array
*/
public static $names = [
self::LLQ => 'LLQ',
self::UL => 'UL',
self::NSID => 'NSID',
self::DAU => 'DAU',
self::DHU => 'DHU',
self::N3U => 'N3U',
self::CLIENT_SUBNET => 'CLIENT_SUBNET',
self::EXPIRE => 'EXPIRE',
self::COOKIE => 'COOKIE',
self::TCP_KEEPALIVE => 'TCP_KEEPALIVE',
self::PADDING => 'PADDING',
self::CHAIN => 'CHAIN',
self::KEY_CHAIN => 'KEY_CHAIN',
self::DNS_ERROR => 'DNS_ERROR',
self::CLIENT_TAG => 'CLIENT_TAG',
self::SERVER_TAG => 'SERVER_TAG',
];
/**
* @param int|string $option either the option name (string) or the option code (integer)
*/
public static function isValid($option): bool
{
if (is_int($option)) {
return array_key_exists($option, self::$names);
}
return in_array($option, self::$names);
}
/**
* Get the name of an Option code. E.g. Codes::getName(8) return 'CLIENT_SUBNET'.
*
* @param int $code The index of the code
*
* @throws UnsupportedOptionException
*/
public static function getName(int $code): string
{
if (!self::isValid($code)) {
throw new UnsupportedOptionException(sprintf('The integer "%d" does not correspond to a supported code.', $code));
}
return self::$names[$code];
}
}