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<?php

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namespace Wordfence\MmdbReader;

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use Wordfence\MmdbReader\Exception\InvalidIpAddressException;

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class IpAddress implements IpAddressInterface {

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const TYPE_IPV4 = 4;

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const TYPE_IPV6 = 6;

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const LENGTH_IPV4 = 4;

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const LENGTH_IPV6 = 16;

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const SEPARATOR_IPV4 = '.';

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const SEPARATOR_IPV6 = ':';

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private static $SEPARATORS = array(

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self::SEPARATOR_IPV4,

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self::SEPARATOR_IPV6

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);

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private $humanReadable;

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private $binary;

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private $type;

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protected function __construct($humanReadable, $binary) {

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$this->humanReadable = $humanReadable;

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$this->binary = $binary;

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$this->type = self::resolveType($binary);

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}

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public function getHumanReadable() {

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return $this->humanReadable;

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}

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public function getBinary() {

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return $this->binary;

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}

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public function getType() {

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return $this->type;

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}

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private static function resolveType($binary) {

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return strlen($binary) === self::LENGTH_IPV6 ? self::TYPE_IPV6 : self::TYPE_IPV4;

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}

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/**

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* Create an IpAddress instance from a human-readable string

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* @param string $humanReadable a human readable IP address

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* @return IpAddress

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* @throws InvalidIpAddressException if $humanReadable is not a valid human-readable IP address

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public static function createFromHumanReadable($humanReadable) {

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$binary = inet_pton($humanReadable);

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if ($binary === false)

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throw new InvalidIpAddressException("IP address \"{$humanReadable}\" is malformed");

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return new self($humanReadable, $binary);

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}

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/**

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* Create an IpAddress instance from a binary string

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* @param string $binary a binary IP address

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* @return IpAddress

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* @throws InvalidIpAddressException if $binary is not a valid binary IP address

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public static function createFromBinary($binary) {

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$humanReadable = inet_ntop($binary);

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if ($humanReadable === false)

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throw new InvalidIpAddressException("Binary IP address data is invalid: " . bin2hex($binary));

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return new self($humanReadable, $binary);

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}

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/**

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* Create an IpAddress instance from an unknown string representation

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* @param string $string either a human-readable or binary IP address

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* @return IpAddress

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* @throws InvalidIpAddressException if $string cannot be parsed as a valid IP address

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public static function createFromString($string) {

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foreach (self::$SEPARATORS as $separator) {

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if (strpos($string, $separator) !== false) {

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try {

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return self::createFromHumanReadable($string);

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}

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catch (InvalidIpAddressException $e) {

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break;

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}

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}

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}

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return self::createFromBinary($string);

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}

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public function __toString() {

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return $this->getHumanReadable();

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}

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}

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