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<?php |
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namespace Bavix\IP; |
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class RangeUtil |
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{ |
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/** |
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* @var array |
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*/ |
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protected $checked = []; |
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/** |
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* @var array |
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*/ |
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protected $results = []; |
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/** |
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* @var string |
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*/ |
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protected $lastIP; |
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/** |
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* @return RangeUtil |
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*/ |
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public static function sharedInstance(): self |
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{ |
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static $object; |
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if (!$object) { |
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$object = new static(); |
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} |
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return $object; |
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} |
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/** |
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* @param string $ip |
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* @param string $subnet |
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* @return bool |
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*/ |
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protected function has(string $ip, string $subnet): bool |
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{ |
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return isset($this->checked[$subnet][$ip]); |
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} |
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/** |
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* @param string $ip |
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* @param string $subnet |
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* @return bool |
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*/ |
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protected function get(string $ip, string $subnet): bool |
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{ |
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return $this->results[$subnet][$ip]; |
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} |
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/** |
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* @param string $ip |
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* @param string $subnet |
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* @param bool $value |
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* @return bool |
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*/ |
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protected function set(string $ip, string $subnet, bool $value): bool |
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{ |
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$this->checked[$subnet][$ip] = true; |
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$this->results[$subnet][$ip] = $value; |
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return $value; |
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} |
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/** |
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* @param string $subnet |
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* @param int $max |
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* |
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* @return int |
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*/ |
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protected function netMask(string $subnet, int $max): int |
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{ |
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$netMask = $max; |
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$parts = \explode('/', $subnet, 2); |
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if (\count($parts) === 2) { |
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$netMask = (int)\array_pop($parts); |
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} |
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$this->lastIP = \array_pop($parts); |
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return \max(1, \min($max, $netMask)); |
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} |
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/** |
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* @param string $ip |
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* @param string $subnet |
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* |
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* @return bool |
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*/ |
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protected function ipv4(string $ip, string $subnet): bool |
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{ |
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$max = 32; |
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$netMask = $this->netMask($subnet, $max); |
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$ipSubnet = $this->lastIP; |
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$networkLong = \ip2long($ipSubnet); |
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$mask = 0xffffffff << ($max - $netMask); |
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$ipLong = \ip2long($ip); |
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return ($ipLong & $mask) === ($networkLong & $mask); |
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} |
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/** |
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* @param string $ip |
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* @param string $subnet |
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* |
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* @return bool |
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*/ |
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protected function ipv6(string $ip, string $subnet): bool |
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{ |
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$max = 128; |
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$netMask = $this->netMask($subnet, $max); |
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$ipSubnet = $this->lastIP; |
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$bytesSubnet = \unpack('n*', @\inet_pton($ipSubnet)); |
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$bytesAddress = \unpack('n*', @\inet_pton($ip)); |
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if (empty($bytesSubnet) || empty($bytesAddress)) { |
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return false; |
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} |
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for ($i = 1, $ceil = \ceil($netMask / 16); $i <= $ceil; ++$i) { |
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$left = $netMask - 16 * ($i - 1); |
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$left = ($left <= 16) ? $left : 16; |
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$mask = ~(0xffff >> $left) & 0xffff; |
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if (($bytesSubnet[$i] & $mask) !== ($bytesAddress[$i] & $mask)) { |
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return false; |
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} |
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} |
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return true; |
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} |
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/** |
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* @param string $ip |
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* @param string $subnet |
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* @return bool |
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*/ |
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public function check(string $ip, string $subnet): bool |
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{ |
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if ($this->has($ip, $subnet)) { |
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return $this->get($ip, $subnet); |
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} |
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if (\strpos($ip, '.')) { |
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return $this->set( |
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$ip, |
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$subnet, |
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$this->ipv4($ip, $subnet) |
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); |
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} |
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return $this->set( |
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$ip, |
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$subnet, |
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$this->ipv6($ip, $subnet) |
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); |
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} |
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166
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} |
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bavix /
ip
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