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<?php
/**
* Zend Framework (http://framework.zend.com/)
*
* @link http://github.com/zendframework/zf2 for the canonical source repository
* @copyright Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
*/
namespace Zend\Validator;
use Traversable;
class Ip extends AbstractValidator
{
const INVALID = 'ipInvalid';
const NOT_IP_ADDRESS = 'notIpAddress';
/**
* @var array
*/
protected $messageTemplates = array(
self::INVALID => 'Invalid type given. String expected',
self::NOT_IP_ADDRESS => "The input does not appear to be a valid IP address",
);
/**
* Internal options
*
* @var array
*/
protected $options = array(
'allowipv4' => true, // Enable IPv4 Validation
'allowipv6' => true, // Enable IPv6 Validation
'allowipvfuture' => false, // Enable IPvFuture Validation
'allowliteral' => true, // Enable IPs in literal format (only IPv6 and IPvFuture)
);
/**
* Sets the options for this validator
*
* @param array|Traversable $options
* @throws Exception\InvalidArgumentException If there is any kind of IP allowed or $options is not an array or Traversable.
* @return AbstractValidator
*/
public function setOptions($options = array())
{
parent::setOptions($options);
if (!$this->options['allowipv4'] && !$this->options['allowipv6'] && !$this->options['allowipvfuture']) {
throw new Exception\InvalidArgumentException('Nothing to validate. Check your options');
}
return $this;
}
/**
* Returns true if and only if $value is a valid IP address
*
* @param mixed $value
* @return bool
*/
public function isValid($value)
{
if (!is_string($value)) {
$this->error(self::INVALID);
return false;
}
$this->setValue($value);
if ($this->options['allowipv4'] && $this->validateIPv4($value)) {
return true;
} else {
if ((bool) $this->options['allowliteral']) {
static $regex = '/^\[(.*)\]$/';
if ((bool) preg_match($regex, $value, $matches)) {
$value = $matches[1];
}
}
if (($this->options['allowipv6'] && $this->validateIPv6($value)) ||
($this->options['allowipvfuture'] && $this->validateIPvFuture($value))
) {
return true;
}
}
$this->error(self::NOT_IP_ADDRESS);
return false;
}
/**
* Validates an IPv4 address
*
* @param string $value
* @return bool
*/
protected function validateIPv4($value)
{
if (preg_match('/^([01]{8}.){3}[01]{8}\z/i', $value)) {
// binary format 00000000.00000000.00000000.00000000
$value = bindec(substr($value, 0, 8)) . '.' . bindec(substr($value, 9, 8)) . '.'
. bindec(substr($value, 18, 8)) . '.' . bindec(substr($value, 27, 8));
} elseif (preg_match('/^([0-9]{3}.){3}[0-9]{3}\z/i', $value)) {
// octet format 777.777.777.777
$value = (int) substr($value, 0, 3) . '.' . (int) substr($value, 4, 3) . '.'
. (int) substr($value, 8, 3) . '.' . (int) substr($value, 12, 3);
} elseif (preg_match('/^([0-9a-f]{2}.){3}[0-9a-f]{2}\z/i', $value)) {
// hex format ff.ff.ff.ff
$value = hexdec(substr($value, 0, 2)) . '.' . hexdec(substr($value, 3, 2)) . '.'
. hexdec(substr($value, 6, 2)) . '.' . hexdec(substr($value, 9, 2));
}
$ip2long = ip2long($value);
if ($ip2long === false) {
return false;
}
return ($value == long2ip($ip2long));
}
/**
* Validates an IPv6 address
*
* @param string $value Value to check against
* @return bool True when $value is a valid ipv6 address
* False otherwise
*/
protected function validateIPv6($value)
{
if (strlen($value) < 3) {
return $value == '::';
}
if (strpos($value, '.')) {
$lastcolon = strrpos($value, ':');
if (!($lastcolon && $this->validateIPv4(substr($value, $lastcolon + 1)))) {
return false;
}
$value = substr($value, 0, $lastcolon) . ':0:0';
}
if (strpos($value, '::') === false) {
return preg_match('/\A(?:[a-f0-9]{1,4}:){7}[a-f0-9]{1,4}\z/i', $value);
}
$colonCount = substr_count($value, ':');
if ($colonCount < 8) {
return preg_match('/\A(?::|(?:[a-f0-9]{1,4}:)+):(?:(?:[a-f0-9]{1,4}:)*[a-f0-9]{1,4})?\z/i', $value);
}
// special case with ending or starting double colon
if ($colonCount == 8) {
return preg_match('/\A(?:::)?(?:[a-f0-9]{1,4}:){6}[a-f0-9]{1,4}(?:::)?\z/i', $value);
}
return false;
}
/**
* Validates an IPvFuture address.
*
* IPvFuture is loosely defined in the Section 3.2.2 of RFC 3986
*
* @param string $value Value to check against
* @return bool True when $value is a valid IPvFuture address
* False otherwise
*/
protected function validateIPvFuture($value)
{
/*
* ABNF:
* IPvFuture = "v" 1*HEXDIG "." 1*( unreserved / sub-delims / ":" )
* unreserved = ALPHA / DIGIT / "-" / "." / "_" / "~"
* sub-delims = "!" / "$" / "&" / "'" / "(" / ")" / "*" / "+" / ","
* / ";" / "="
*/
static $regex = '/^v([[:xdigit:]]+)\.[[:alnum:]\-\._~!\$&\'\(\)\*\+,;=:]+$/';
$result = (bool) preg_match($regex, $value, $matches);
/*
* "As such, implementations must not provide the version flag for the
* existing IPv4 and IPv6 literal address forms described below."
*/
return ($result && $matches[1] != 4 && $matches[1] != 6);
}
}
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