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62 lines
1.4 KiB
PHP
62 lines
1.4 KiB
PHP
<?php
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declare(strict_types=1);
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/**
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* SPDX-FileCopyrightText: 2022 Nextcloud GmbH and Nextcloud contributors
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* SPDX-License-Identifier: AGPL-3.0-or-later
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*/
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namespace OC\Net;
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use IPLib\Address\IPv6;
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use IPLib\Factory;
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use IPLib\ParseStringFlag;
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use Symfony\Component\HttpFoundation\IpUtils;
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use function filter_var;
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/**
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* Classifier for IP addresses
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*
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* @internal
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*/
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class IpAddressClassifier {
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private const LOCAL_ADDRESS_RANGES = [
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'100.64.0.0/10', // See RFC 6598
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'192.0.0.0/24', // See RFC 6890
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];
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/**
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* Check host identifier for local IPv4 and IPv6 address ranges
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*
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* Hostnames are not considered local. Use the HostnameClassifier for those.
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*/
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public function isLocalAddress(string $ip): bool {
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$parsedIp = Factory::parseAddressString(
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$ip,
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ParseStringFlag::IPV4_MAYBE_NON_DECIMAL | ParseStringFlag::IPV4ADDRESS_MAYBE_NON_QUAD_DOTTED | ParseStringFlag::MAY_INCLUDE_ZONEID
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);
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if ($parsedIp === null) {
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/* Not an IP */
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return false;
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}
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/* Replace by normalized form */
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if ($parsedIp instanceof IPv6) {
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$ip = (string)($parsedIp->toIPv4() ?? $parsedIp);
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} else {
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$ip = (string)$parsedIp;
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}
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if (!filter_var($ip, FILTER_VALIDATE_IP, FILTER_FLAG_NO_PRIV_RANGE | FILTER_FLAG_NO_RES_RANGE)) {
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/* Range address */
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return true;
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}
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if (IpUtils::checkIp($ip, self::LOCAL_ADDRESS_RANGES)) {
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/* Within local range */
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return true;
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}
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return false;
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}
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}
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