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wp-content/plugins/woocommerce-payments/vendor/automattic/jetpack-ip/CHANGELOG.md
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# Changelog
All notable changes to this project will be documented in this file.
The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/)
and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
## [0.4.1] - 2024-11-25
### Changed
- Updated package dependencies. [#40258]
## [0.4.0] - 2024-11-14
### Removed
- General: Update minimum PHP version to 7.2. [#40147]
## [0.3.1] - 2024-11-04
### Added
- Enable test coverage. [#39961]
### Fixed
- Fix PHPUnit coverage warnings. [#39989]
## [0.3.0] - 2024-09-23
### Added
- IP Utils: added support for CIDR ranges. [#39425]
## [0.2.3] - 2024-08-23
### Changed
- Updated package dependencies. [#39004]
## [0.2.2] - 2024-03-12
### Changed
- Internal updates.
## [0.2.1] - 2023-11-21
### Changed
- Added a note of non-usage of PHP8+ functions yet. [#34137]
## [0.2.0] - 2023-11-20
### Changed
- Updated required PHP version to >= 7.0. [#34192]
## [0.1.6] - 2023-09-19
- Minor internal updates.
## [0.1.5] - 2023-08-23
### Changed
- Updated package dependencies. [#32605]
## [0.1.4] - 2023-05-29
### Changed
- Internal updates.
## [0.1.3] - 2023-05-11
- Updated package dependencies
## [0.1.2] - 2023-04-10
### Added
- Add Jetpack Autoloader package suggestion. [#29988]
## [0.1.1] - 2023-03-28
### Changed
- Update README.md [#28401]
## 0.1.0 - 2023-02-28
### Added
- Added a utility function to extract an array of IP addresses from a given string. [#29131]
- Add jetpack-ip package functionality [#28846]
- Initialized the package. [#28765]
[0.4.1]: https://github.com/automattic/jetpack-ip/compare/v0.4.0...v0.4.1
[0.4.0]: https://github.com/automattic/jetpack-ip/compare/v0.3.1...v0.4.0
[0.3.1]: https://github.com/automattic/jetpack-ip/compare/v0.3.0...v0.3.1
[0.3.0]: https://github.com/automattic/jetpack-ip/compare/v0.2.3...v0.3.0
[0.2.3]: https://github.com/automattic/jetpack-ip/compare/v0.2.2...v0.2.3
[0.2.2]: https://github.com/automattic/jetpack-ip/compare/v0.2.1...v0.2.2
[0.2.1]: https://github.com/automattic/jetpack-ip/compare/v0.2.0...v0.2.1
[0.2.0]: https://github.com/automattic/jetpack-ip/compare/v0.1.6...v0.2.0
[0.1.6]: https://github.com/automattic/jetpack-ip/compare/v0.1.5...v0.1.6
[0.1.5]: https://github.com/automattic/jetpack-ip/compare/v0.1.4...v0.1.5
[0.1.4]: https://github.com/automattic/jetpack-ip/compare/v0.1.3...v0.1.4
[0.1.3]: https://github.com/automattic/jetpack-ip/compare/v0.1.2...v0.1.3
[0.1.2]: https://github.com/automattic/jetpack-ip/compare/v0.1.1...v0.1.2
[0.1.1]: https://github.com/automattic/jetpack-ip/compare/v0.1.0...v0.1.1
wp-content/plugins/woocommerce-payments/vendor/automattic/jetpack-ip/LICENSE.txt
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This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
===================================
GNU GENERAL PUBLIC LICENSE
Version 2, June 1991
Copyright (C) 1989, 1991 Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
Everyone is permitted to copy and distribute verbatim copies
of this license document, but changing it is not allowed.
Preamble
The licenses for most software are designed to take away your
freedom to share and change it. By contrast, the GNU General Public
License is intended to guarantee your freedom to share and change free
software--to make sure the software is free for all its users. This
General Public License applies to most of the Free Software
Foundation's software and to any other program whose authors commit to
using it. (Some other Free Software Foundation software is covered by
the GNU Lesser General Public License instead.) You can apply it to
your programs, too.
When we speak of free software, we are referring to freedom, not
price. Our General Public Licenses are designed to make sure that you
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To protect your rights, we need to make restrictions that forbid
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We protect your rights with two steps: (1) copyright the software, and
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The precise terms and conditions for copying, distribution and
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GNU GENERAL PUBLIC LICENSE
TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
0. This License applies to any program or other work which contains
a notice placed by the copyright holder saying it may be distributed
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You may charge a fee for the physical act of transferring a copy, and
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NO WARRANTY
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END OF TERMS AND CONDITIONS
How to Apply These Terms to Your New Programs
If you develop a new program, and you want it to be of the greatest
possible use to the public, the best way to achieve this is to make it
free software which everyone can redistribute and change under these terms.
To do so, attach the following notices to the program. It is safest
to attach them to the start of each source file to most effectively
convey the exclusion of warranty; and each file should have at least
the "copyright" line and a pointer to where the full notice is found.
<one line to give the program's name and a brief idea of what it does.>
Copyright (C) <year> <name of author>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
Also add information on how to contact you by electronic and paper mail.
If the program is interactive, make it output a short notice like this
when it starts in an interactive mode:
Gnomovision version 69, Copyright (C) year name of author
Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
This is free software, and you are welcome to redistribute it
under certain conditions; type `show c' for details.
The hypothetical commands `show w' and `show c' should show the appropriate
parts of the General Public License. Of course, the commands you use may
be called something other than `show w' and `show c'; they could even be
mouse-clicks or menu items--whatever suits your program.
You should also get your employer (if you work as a programmer) or your
school, if any, to sign a "copyright disclaimer" for the program, if
necessary. Here is a sample; alter the names:
Yoyodyne, Inc., hereby disclaims all copyright interest in the program
`Gnomovision' (which makes passes at compilers) written by James Hacker.
<signature of Ty Coon>, 1 April 1989
Ty Coon, President of Vice
This General Public License does not permit incorporating your program into
proprietary programs. If your program is a subroutine library, you may
consider it more useful to permit linking proprietary applications with the
library. If this is what you want to do, use the GNU Lesser General
Public License instead of this License.
wp-content/plugins/woocommerce-payments/vendor/automattic/jetpack-ip/README.md
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# Jetpack IP Package
Utilities for working with IP addresses.
## Usage
```php
use Automattic\Jetpack\IP\Utils;
echo "Your IP address is: " . Utils::get_ip();
```
## Using this package in your WordPress plugin
If you plan on using this package in your WordPress plugin, we would recommend that you use [Jetpack Autoloader](https://packagist.org/packages/automattic/jetpack-autoloader) as your autoloader. This will allow for maximum interoperability with other plugins that use this package as well.
## Security
Need to report a security vulnerability? Go to [https://automattic.com/security/](https://automattic.com/security/) or directly to our security bug bounty site [https://hackerone.com/automattic](https://hackerone.com/automattic).
## License
IP is licensed under [GNU General Public License v2 (or later)](./LICENSE.txt)
wp-content/plugins/woocommerce-payments/vendor/automattic/jetpack-ip/SECURITY.md
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# Security Policy
Full details of the Automattic Security Policy can be found on [automattic.com](https://automattic.com/security/).
## Supported Versions
Generally, only the latest version of Jetpack and its associated plugins have continued support. If a critical vulnerability is found in the current version of a plugin, we may opt to backport any patches to previous versions.
## Reporting a Vulnerability
Our HackerOne program covers the below plugin software, as well as a variety of related projects and infrastructure:
* [Jetpack](https://jetpack.com/)
* Jetpack Backup
* Jetpack Boost
* Jetpack CRM
* Jetpack Protect
* Jetpack Search
* Jetpack Social
* Jetpack VideoPress
**For responsible disclosure of security issues and to be eligible for our bug bounty program, please submit your report via the [HackerOne](https://hackerone.com/automattic) portal.**
Our most critical targets are:
* Jetpack and the Jetpack composer packages (all within this repo)
* Jetpack.com -- the primary marketing site.
* cloud.jetpack.com -- a management site.
* wordpress.com -- the shared management site for both Jetpack and WordPress.com sites.
For more targets, see the `In Scope` section on [HackerOne](https://hackerone.com/automattic).
_Please note that the **WordPress software is a separate entity** from Automattic. Please report vulnerabilities for WordPress through [the WordPress Foundation's HackerOne page](https://hackerone.com/wordpress)._
## Guidelines
We're committed to working with security researchers to resolve the vulnerabilities they discover. You can help us by following these guidelines:
* Follow [HackerOne's disclosure guidelines](https://www.hackerone.com/disclosure-guidelines).
* Pen-testing Production:
* Please **setup a local environment** instead whenever possible. Most of our code is open source (see above).
* If that's not possible, **limit any data access/modification** to the bare minimum necessary to reproduce a PoC.
* **_Don't_ automate form submissions!** That's very annoying for us, because it adds extra work for the volunteers who manage those systems, and reduces the signal/noise ratio in our communication channels.
* To be eligible for a bounty, all of these guidelines must be followed.
* Be Patient - Give us a reasonable time to correct the issue before you disclose the vulnerability.
We also expect you to comply with all applicable laws. You're responsible to pay any taxes associated with your bounties.
wp-content/plugins/woocommerce-payments/vendor/automattic/jetpack-ip/composer.json
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{
"name": "automattic/jetpack-ip",
"description": "Utilities for working with IP addresses.",
"type": "jetpack-library",
"license": "GPL-2.0-or-later",
"require": {
"php": ">=7.2"
},
"require-dev": {
"brain/monkey": "^2.6.2",
"yoast/phpunit-polyfills": "^1.1.1",
"automattic/jetpack-changelogger": "^5.1.0"
},
"suggest": {
"automattic/jetpack-autoloader": "Allow for better interoperability with other plugins that use this package."
},
"autoload": {
"classmap": [
"src/"
]
},
"scripts": {
"phpunit": [
"./vendor/phpunit/phpunit/phpunit --colors=always"
],
"test-coverage": [
"php -dpcov.directory=. ./vendor/bin/phpunit --coverage-php \"$COVERAGE_DIR/php.cov\""
],
"test-php": [
"@composer phpunit"
]
},
"minimum-stability": "dev",
"prefer-stable": true,
"extra": {
"autotagger": true,
"mirror-repo": "Automattic/jetpack-ip",
"changelogger": {
"link-template": "https://github.com/automattic/jetpack-ip/compare/v${old}...v${new}"
},
"branch-alias": {
"dev-trunk": "0.4.x-dev"
},
"textdomain": "jetpack-ip",
"version-constants": {
"::PACKAGE_VERSION": "src/class-utils.php"
}
}
}
wp-content/plugins/woocommerce-payments/vendor/automattic/jetpack-ip/src/class-utils.php
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<?php
/**
* Utils class file.
*
* @package automattic/jetpack-ip
*/
namespace Automattic\Jetpack\IP;
/**
* Class that provides static methods for working with IP addresses.
*/
class Utils {
const PACKAGE_VERSION = '0.4.1';
/**
* Get the current user's IP address.
*
* @return string|false IP address.
*/
public static function get_ip() {
$trusted_header_data = get_site_option( 'trusted_ip_header' );
if ( isset( $trusted_header_data->trusted_header ) && isset( $_SERVER[ $trusted_header_data->trusted_header ] ) ) {
$ip = wp_unslash( $_SERVER[ $trusted_header_data->trusted_header ] ); // phpcs:ignore WordPress.Security.ValidatedSanitizedInput.InputNotSanitized -- clean_ip does it below.
$segments = $trusted_header_data->segments;
$reverse_order = $trusted_header_data->reverse;
} else {
$ip = isset( $_SERVER['REMOTE_ADDR'] ) ? wp_unslash( $_SERVER['REMOTE_ADDR'] ) : null; // phpcs:ignore WordPress.Security.ValidatedSanitizedInput.InputNotSanitized -- clean_ip does it below.
}
if ( ! $ip ) {
return false;
}
$ips = explode( ',', $ip );
if ( ! isset( $segments ) || ! $segments ) {
$segments = 1;
}
if ( isset( $reverse_order ) && $reverse_order ) {
$ips = array_reverse( $ips );
}
$ip_count = count( $ips );
if ( 1 === $ip_count ) {
return self::clean_ip( $ips[0] );
} elseif ( $ip_count >= $segments ) {
$the_one = $ip_count - $segments;
return self::clean_ip( $ips[ $the_one ] );
} else {
return self::clean_ip( isset( $_SERVER['REMOTE_ADDR'] ) ? wp_unslash( $_SERVER['REMOTE_ADDR'] ) : null ); // phpcs:ignore WordPress.Security.ValidatedSanitizedInput.InputNotSanitized -- clean_ip does it.
}
}
/**
* Clean IP address.
*
* @param string $ip The IP address to clean.
* @return string|false The cleaned IP address.
*/
public static function clean_ip( $ip ) {
// Some misconfigured servers give back extra info, which comes after "unless".
$ips = explode( ' unless ', $ip );
$ip = $ips[0];
$ip = strtolower( trim( $ip ) );
// Check for IPv4 with port.
if ( preg_match( '/^(\d+\.\d+\.\d+\.\d+):\d+$/', $ip, $matches ) ) {
$ip = $matches[1];
}
// Check for IPv6 (or IPvFuture) with brackets and optional port.
if ( preg_match( '/^\[([a-z0-9\-._~!$&\'()*+,;=:]+)\](?::\d+)?$/', $ip, $matches ) ) {
$ip = $matches[1];
}
// Check for IPv4 IP cast as IPv6.
if ( preg_match( '/^::ffff:(\d+\.\d+\.\d+\.\d+)$/', $ip, $matches ) ) {
$ip = $matches[1];
}
// Validate and return.
return filter_var( $ip, FILTER_VALIDATE_IP ) ? $ip : false;
}
/**
* Checks an IP to see if it is within a private range.
*
* @param int $ip IP address.
* @return bool True if IP address is private, false otherwise.
*/
public static function ip_is_private( $ip ) {
// We are dealing with ipv6, so we can simply rely on filter_var.
// Note: str_contains() is not used here, as wp-includes/compat.php may not be loaded in this file.
if ( false === strpos( $ip, '.' ) ) {
return ! filter_var( $ip, FILTER_VALIDATE_IP, FILTER_FLAG_NO_PRIV_RANGE | FILTER_FLAG_NO_RES_RANGE );
}
// We are dealing with ipv4.
$private_ip4_addresses = array(
'10.0.0.0|10.255.255.255', // Single class A network.
'172.16.0.0|172.31.255.255', // 16 contiguous class B network.
'192.168.0.0|192.168.255.255', // 256 contiguous class C network.
'169.254.0.0|169.254.255.255', // Link-local address also referred to as Automatic Private IP Addressing.
'127.0.0.0|127.255.255.255', // localhost.
);
$long_ip = ip2long( $ip );
if ( -1 !== $long_ip ) {
foreach ( $private_ip4_addresses as $pri_addr ) {
list ( $start, $end ) = explode( '|', $pri_addr );
if ( $long_ip >= ip2long( $start ) && $long_ip <= ip2long( $end ) ) {
return true;
}
}
}
return false;
}
/**
* Validate an IP address.
*
* @param string $ip IP address.
* @return bool True if valid, false otherwise.
*/
private static function validate_ip_address( string $ip ) {
return filter_var( $ip, FILTER_VALIDATE_IP );
}
/**
* Validate an array of IP addresses.
*
* @param array $ips List of IP addresses.
* @return bool True if all IPs are valid, false otherwise.
*/
private static function validate_ip_addresses( array $ips ) {
foreach ( $ips as $ip ) {
if ( ! self::validate_ip_address( $ip ) ) {
return false;
}
}
return true;
}
/**
* Uses inet_pton if available to convert an IP address to a binary string.
* Returns false if an invalid IP address is given.
*
* @param mixed $ip IP address.
* @return int|string|bool
*/
public static function convert_ip_address( $ip ) {
return inet_pton( $ip );
}
/**
* Determines the IP version of the given IP address.
*
* @param string $ip IP address.
* @return string|false 'ipv4', 'ipv6', or false if invalid.
*/
public static function get_ip_version( $ip ) {
if ( filter_var( $ip, FILTER_VALIDATE_IP, FILTER_FLAG_IPV4 ) ) {
return 'ipv4';
} elseif ( filter_var( $ip, FILTER_VALIDATE_IP, FILTER_FLAG_IPV6 ) ) {
return 'ipv6';
} else {
return false;
}
}
/**
* Extracts IP addresses from a given string.
*
* Supports IPv4 and IPv6 ranges in both hyphen and CIDR notation.
*
* @param string $ips List of IPs.
* @return array List of valid IP addresses or ranges.
*/
public static function get_ip_addresses_from_string( $ips ) {
// Split the string by spaces, commas, and semicolons.
$ips = preg_split( '/[\s,;]/', (string) $ips );
$result = array();
foreach ( $ips as $ip ) {
$ip = trim( $ip );
// Check for CIDR notation
if ( strpos( $ip, '/' ) !== false ) {
if ( self::validate_cidr( $ip ) ) {
$result[] = $ip;
}
continue;
}
// Validate both IP values from the hyphen range.
$range = explode( '-', $ip );
if ( count( $range ) === 2 ) {
if ( self::validate_ip_range( $range[0], $range[1] ) ) {
$result[] = $ip;
}
continue;
}
// Validate the single IP value.
if ( filter_var( $ip, FILTER_VALIDATE_IP ) !== false ) {
$result[] = $ip;
}
}
return $result;
}
/**
* Validates CIDR notation for IPv4 and IPv6 addresses.
*
* @param string $cidr CIDR notation IP address.
* @return bool True if valid, false otherwise.
*/
public static function validate_cidr( $cidr ) {
// Split the CIDR notation into IP address and prefix length using the '/' separator.
$parts = explode( '/', $cidr );
if ( count( $parts ) !== 2 ) {
return false; // Invalid CIDR notation if it doesn't contain exactly one '/'.
}
list( $ip, $netmask ) = $parts;
// Validate the IP address.
if ( ! filter_var( $ip, FILTER_VALIDATE_IP ) ) {
return false;
}
$ip_version = self::get_ip_version( $ip );
if ( ! $ip_version ) {
return false; // Invalid IP address.
}
// Validate the netmask based on the IP version.
if ( ! self::validate_netmask( $netmask, $ip_version ) ) {
return false;
}
return true;
}
/**
* Checks if an IP address is within a CIDR range.
* Supports both IPv4 and IPv6.
*
* @param string $ip IP address.
* @param string $cidr CIDR notation IP range.
* @return bool True if IP is within the range, false otherwise.
*/
public static function ip_in_cidr( $ip, $cidr ) {
// Parse the CIDR notation to extract the base IP address and netmask prefix length.
$parsed_cidr = self::parse_cidr( $cidr );
if ( ! $parsed_cidr ) {
return false;
}
list( $range, $netmask ) = $parsed_cidr;
// Determine the IP version (IPv4 or IPv6) of both the input IP and the CIDR range IP.
$ip_version = self::get_ip_version( $ip );
$range_version = self::get_ip_version( $range );
// Ensure both IP addresses are valid and of the same IP version.
if ( ! $ip_version || ! $range_version || $ip_version !== $range_version ) {
return false;
}
// Validate the netmask based on the IP version.
if ( ! self::validate_netmask( $netmask, $ip_version ) ) {
return false;
}
if ( $ip_version === 'ipv4' ) {
return self::ip_in_ipv4_cidr( $ip, $range, $netmask );
} else {
return self::ip_in_ipv6_cidr( $ip, $range, $netmask );
}
}
/**
* Parses the CIDR notation into network address and netmask.
*
* @param string $cidr CIDR notation IP range.
* @return array|false Array containing network address and netmask, or false on failure.
*/
public static function parse_cidr( $cidr ) {
$cidr_parts = explode( '/', $cidr, 2 );
if ( count( $cidr_parts ) !== 2 ) {
return false; // Invalid CIDR notation
}
list( $range, $netmask ) = $cidr_parts;
// Determine IP version
$ip_version = self::get_ip_version( $range );
if ( ! $ip_version ) {
return false; // Invalid IP address
}
// Validate netmask range
if ( ! self::validate_netmask( $netmask, $ip_version ) ) {
return false; // Netmask out of range
}
return array( $range, (int) $netmask );
}
/**
* Validates the netmask based on IP version.
*
* @param string|int $netmask Netmask value.
* @param string $ip_version 'ipv4' or 'ipv6'.
* @return bool True if valid, false otherwise.
*/
public static function validate_netmask( $netmask, $ip_version ) {
// Ensure that $netmask is an integer
if ( ! ctype_digit( (string) $netmask ) ) {
return false;
}
$netmask = (int) $netmask;
// Validate the netmask based on the IP version.
if ( $ip_version === 'ipv4' ) {
return ( $netmask >= 0 && $netmask <= 32 );
} elseif ( $ip_version === 'ipv6' ) {
return ( $netmask >= 0 && $netmask <= 128 );
} else {
return false;
}
}
/**
* Checks if an IPv4 address is within a CIDR range.
*
* @param string $ip IPv4 address to check.
* @param string $range IPv4 network address.
* @param int $netmask Netmask value.
* @return bool True if IP is within the range, false otherwise.
*/
public static function ip_in_ipv4_cidr( $ip, $range, $netmask ) {
// Validate arguments.
if ( ! self::validate_ip_addresses( array( $ip, $range ) ) || ! self::validate_netmask( $netmask, 'ipv4' ) ) {
return false; // Invalid IP address or netmask.
}
// Convert IP addresses from their dotted representation to 32-bit unsigned integers.
$ip_long = ip2long( $ip );
$range_long = ip2long( $range );
// Check if the conversion was successful.
if ( $ip_long === false || $range_long === false ) {
return false; // One of the IP addresses is invalid.
}
/**
* Create the subnet mask as a 32-bit unsigned integer.
*
* Explanation:
* - (32 - $netmask) calculates the number of host bits (the bits not used for the network address).
* - (1 << (32 - $netmask)) shifts the number 1 left by the number of host bits.
* This results in a number where there is a single 1 followed by zeros equal to the number of host bits.
* - Subtracting 1 gives us a number where the host bits are all 1s.
* - Applying the bitwise NOT operator (~) inverts the bits, turning all host bits to 0 and network bits to 1.
* This results in the subnet mask having 1s in the network portion and 0s in the host portion.
*
* Example for netmask = 24:
* - (32 - 24) = 8
* - (1 << 8) = 256 (binary: 00000000 00000000 00000001 00000000)
* - 256 - 1 = 255 (binary: 00000000 00000000 00000000 11111111)
* - ~255 = 4294967040 (binary: 11111111 11111111 11111111 00000000)
*/
$mask = ~ ( ( 1 << ( 32 - $netmask ) ) - 1 );
/**
* Use bitwise AND to apply the subnet mask to both the IP address and the network address.
* - ($ip_long & $mask) isolates the network portion of the IP address.
* - ($range_long & $mask) isolates the network portion of the CIDR range.
* - If both network portions are equal, the IP address belongs to the same subnet and is within the CIDR range.
*/
return ( $ip_long & $mask ) === ( $range_long & $mask );
}
/**
* Checks if an IPv6 address is within a CIDR range.
*
* @param string $ip IPv6 address to check.
* @param string $range IPv6 network address.
* @param int $netmask Netmask value.
* @return bool True if IP is within the range, false otherwise.
*/
public static function ip_in_ipv6_cidr( $ip, $range, $netmask ) {
// Validate arguments.
if ( ! self::validate_ip_addresses( array( $ip, $range ) ) || ! self::validate_netmask( $netmask, 'ipv6' ) ) {
return false; // Invalid IP address or netmask.
}
// Convert IP addresses from their textual representation to binary strings.
$ip_bin = inet_pton( $ip );
$range_bin = inet_pton( $range );
// Check if the conversion was successful.
if ( $ip_bin === false || $range_bin === false ) {
return false; // One of the IP addresses is invalid.
}
/**
* Calculate the subnet mask in binary form.
*
* IPv6 addresses are 128 bits long.
* The netmask defines how many bits are set to 1 in the subnet mask.
*
* - $netmask_full_bytes: Number of full bytes (each 8 bits) that are all 1s.
* - $netmask_remainder_bits: Remaining bits (less than 8) that need to be set to 1.
*
* For example, if $netmask = 65:
* - $netmask_full_bytes = floor(65 / 8) = 8 (since 8 * 8 = 64 bits)
* - $netmask_remainder_bits = 65 % 8 = 1 (1 bit remaining)
*
* We'll construct the subnet mask by:
* - Starting with $netmask_full_bytes of 0xff (11111111 in binary).
* - Adding a byte where the first $netmask_remainder_bits bits are 1, rest are 0.
* - Padding the rest with zeros to make it 16 bytes (128 bits) long.
*/
// Number of full bytes (each full byte is 8 bits) in the netmask.
$netmask_full_bytes = (int) ( $netmask / 8 );
// Number of remaining bits in the last byte of the netmask.
$netmask_remainder_bits = $netmask % 8;
// Start with a string of $netmask_full_bytes of 0xff bytes (each byte is 8 bits set to 1).
$netmask_bin = str_repeat( "\xff", $netmask_full_bytes );
if ( $netmask_remainder_bits > 0 ) {
// Create the last byte with $netmask_remainder_bits bits set to 1 from the left.
// - str_repeat('1', $netmask_remainder_bits): creates a string with the required number of '1's.
// - str_pad(...): pads the string on the right with '0's to make it 8 bits.
// - bindec(...): converts the binary string to a decimal number.
// - chr(...): gets the character corresponding to the byte value.
$last_byte = chr( bindec( str_pad( str_repeat( '1', $netmask_remainder_bits ), 8, '0', STR_PAD_RIGHT ) ) );
// Append the last byte to the netmask binary string.
$netmask_bin .= $last_byte;
}
// Pad the netmask binary string to 16 bytes (128 bits) with zeros (\x00).
$netmask_bin = str_pad( $netmask_bin, 16, "\x00" );
/**
* Use bitwise AND to apply the subnet mask to both the IP address and the network address.
* - ($ip_bin & $netmask_bin) isolates the network portion of the IP address.
* - ($range_bin & $netmask_bin) isolates the network portion of the CIDR range.
* - If both network portions are equal, the IP address belongs to the same subnet and is within the CIDR range.
*/
return ( $ip_bin & $netmask_bin ) === ( $range_bin & $netmask_bin );
}
/**
* Validates the low and high IP addresses of a range.
*
* Now supports IPv6 addresses.
*
* @param string $range_low Low IP address.
* @param string $range_high High IP address.
* @return bool True if the range is valid, false otherwise.
*/
public static function validate_ip_range( $range_low, $range_high ) {
// Validate that both IP addresses are valid.
if ( self::validate_ip_addresses( array( $range_low, $range_high ) ) === false ) {
return false;
}
// Ensure both IPs are of the same version
$range_low_ip_version = self::get_ip_version( $range_low );
$range_high_ip_version = self::get_ip_version( $range_high );
if ( $range_low_ip_version !== $range_high_ip_version || ! $range_low_ip_version || ! $range_high_ip_version ) {
return false; // Invalid or mixed IP versions.
}
// Convert IP addresses to their packed binary representation.
$ip_low = inet_pton( $range_low );
$ip_high = inet_pton( $range_high );
// Check if the conversion was successful.
if ( false === $ip_low || false === $ip_high ) {
return false;
}
// Compare the binary representations to ensure the low IP is not greater than the high IP.
if ( strcmp( $ip_low, $ip_high ) > 0 ) {
return false;
}
return true;
}
/**
* Checks that a given IP address is within a given range.
*
* Supports CIDR notation and hyphenated ranges for both IPv4 and IPv6.
*
* @param string $ip IP address.
* @param string $range_low Range low or CIDR notation.
* @param null|string $range_high Optional. Range high. Not used if $range_low is CIDR notation.
* @return bool
*/
public static function ip_address_is_in_range( $ip, $range_low, $range_high = null ) {
// Validate that all provided IP addresses are valid.
if ( $range_high !== null && ! self::validate_ip_addresses( array( $ip, $range_low, $range_high ) ) ) {
return false;
} else {
$range_low_parsed = self::parse_cidr( $range_low );
if ( $range_low_parsed && ! self::validate_ip_addresses( array( $ip, $range_low_parsed[0] ) ) ) {
return false;
}
}
if ( strpos( $range_low, '/' ) !== false ) {
// CIDR notation
if ( $range_high !== null ) {
// Invalid usage: CIDR notation with range high parameter
return false;
}
return self::ip_in_cidr( $ip, $range_low );
}
// Hyphenated range
if ( $range_high === null ) {
return false; // Invalid parameters
}
$ip_num = inet_pton( $ip );
$ip_low = inet_pton( $range_low );
$ip_high = inet_pton( $range_high );
if ( $ip_num && $ip_low && $ip_high && strcmp( $ip_num, $ip_low ) >= 0 && strcmp( $ip_num, $ip_high ) <= 0 ) {
return true;
}
return false;
}
}