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<?php
/**
* This file is part of the ramsey/uuid library
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*
* @copyright Copyright (c) Ben Ramsey <ben@benramsey.com>
* @license http://opensource.org/licenses/MIT MIT
*/
declare(strict_types=1);
namespace Ramsey\Uuid\Provider\Node;
use Ramsey\Uuid\Exception\NodeException;
use Ramsey\Uuid\Provider\NodeProviderInterface;
use Ramsey\Uuid\Type\Hexadecimal;
use function array_filter;
use function array_map;
use function array_walk;
use function count;
use function ob_get_clean;
use function ob_start;
use function preg_match;
use function preg_match_all;
use function reset;
use function str_contains;
use function str_replace;
use function strtolower;
use function strtoupper;
use function substr;
use const GLOB_NOSORT;
use const PREG_PATTERN_ORDER;
/**
* SystemNodeProvider retrieves the system node ID, if possible
*
* The system node ID, or host ID, is often the same as the MAC address for a
* network interface on the host.
*/
class SystemNodeProvider implements NodeProviderInterface
{
/**
* Pattern to match nodes in ifconfig and ipconfig output.
*/
private const IFCONFIG_PATTERN = '/[^:]([0-9a-f]{2}([:-])[0-9a-f]{2}(\2[0-9a-f]{2}){4})[^:]/i';
/**
* Pattern to match nodes in sysfs stream output.
*/
private const SYSFS_PATTERN = '/^([0-9a-f]{2}:){5}[0-9a-f]{2}$/i';
public function getNode(): Hexadecimal
{
$node = $this->getNodeFromSystem();
if ($node === '') {
throw new NodeException(
'Unable to fetch a node for this system'
);
}
return new Hexadecimal($node);
}
/**
* Returns the system node, if it can find it
*/
protected function getNodeFromSystem(): string
{
static $node = null;
if ($node !== null) {
return (string) $node;
}
// First, try a Linux-specific approach.
$node = $this->getSysfs();
if ($node === '') {
// Search ifconfig output for MAC addresses & return the first one.
$node = $this->getIfconfig();
}
$node = str_replace([':', '-'], '', $node);
return $node;
}
/**
* Returns the network interface configuration for the system
*
* @codeCoverageIgnore
*/
protected function getIfconfig(): string
{
$disabledFunctions = strtolower((string) ini_get('disable_functions'));
if (str_contains($disabledFunctions, 'passthru')) {
return '';
}
/**
* @psalm-suppress UnnecessaryVarAnnotation
* @var string $phpOs
*/
$phpOs = constant('PHP_OS');
ob_start();
switch (strtoupper(substr($phpOs, 0, 3))) {
case 'WIN':
passthru('ipconfig /all 2>&1');
break;
case 'DAR':
passthru('ifconfig 2>&1');
break;
case 'FRE':
passthru('netstat -i -f link 2>&1');
break;
case 'LIN':
default:
passthru('netstat -ie 2>&1');
break;
}
$ifconfig = (string) ob_get_clean();
if (preg_match_all(self::IFCONFIG_PATTERN, $ifconfig, $matches, PREG_PATTERN_ORDER)) {
foreach ($matches[1] as $iface) {
if ($iface !== '00:00:00:00:00:00' && $iface !== '00-00-00-00-00-00') {
return $iface;
}
}
}
return '';
}
/**
* Returns MAC address from the first system interface via the sysfs interface
*/
protected function getSysfs(): string
{
$mac = '';
/**
* @psalm-suppress UnnecessaryVarAnnotation
* @var string $phpOs
*/
$phpOs = constant('PHP_OS');
if (strtoupper($phpOs) === 'LINUX') {
$addressPaths = glob('/sys/class/net/*/address', GLOB_NOSORT);
if ($addressPaths === false || count($addressPaths) === 0) {
return '';
}
/** @var array<array-key, string> $macs */
$macs = [];
array_walk($addressPaths, function (string $addressPath) use (&$macs): void {
if (is_readable($addressPath)) {
$macs[] = file_get_contents($addressPath);
}
});
/** @var callable $trim */
$trim = 'trim';
$macs = array_map($trim, $macs);
// Remove invalid entries.
$macs = array_filter($macs, function (string $address) {
return $address !== '00:00:00:00:00:00'
&& preg_match(self::SYSFS_PATTERN, $address);
});
/** @var string|bool $mac */
$mac = reset($macs);
}
return (string) $mac;
}
}
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