Your IP : 216.73.216.84
<?php
declare(strict_types=1);
namespace SpomkyLabs\Pki\X509\GeneralName;
use UnexpectedValueException;
use function array_slice;
use function count;
final class IPv6Address extends IPAddress
{
public static function create(string $ip, ?string $mask = null): self
{
return new self($ip, $mask);
}
/**
* Initialize from octets.
*/
public static function fromOctets(string $octets): self
{
$mask = null;
$words = unpack('n*', $octets);
$words = $words === false ? [] : $words;
switch (count($words)) {
case 8:
$ip = self::wordsToIPv6String($words);
break;
case 16:
$ip = self::wordsToIPv6String(array_slice($words, 0, 8));
$mask = self::wordsToIPv6String(array_slice($words, 8, 8));
break;
default:
throw new UnexpectedValueException('Invalid IPv6 octet length.');
}
return self::create($ip, $mask);
}
/**
* Convert an array of 16 bit words to an IPv6 string representation.
*
* @param int[] $words
*/
protected static function wordsToIPv6String(array $words): string
{
$groups = array_map(static fn ($word) => sprintf('%04x', $word), $words);
return implode(':', $groups);
}
protected function octets(): string
{
$words = array_map('hexdec', explode(':', $this->ip));
if (isset($this->mask)) {
$words = array_merge($words, array_map('hexdec', explode(':', $this->mask)));
}
return pack('n*', ...$words);
}
}