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   1  <?php
   2  /**
   3   * This file is part of the ramsey/uuid library
   4   *
   5   * For the full copyright and license information, please view the LICENSE
   6   * file that was distributed with this source code.
   7   *
   8   * @copyright Copyright (c) Ben Ramsey <[email protected]>
   9   * @license http://opensource.org/licenses/MIT MIT
  10   * @link https://benramsey.com/projects/ramsey-uuid/ Documentation
  11   * @link https://packagist.org/packages/ramsey/uuid Packagist
  12   * @link https://github.com/ramsey/uuid GitHub
  13   */
  14  
  15  namespace Ramsey\Uuid\Provider\Node;
  16  
  17  use Ramsey\Uuid\Provider\NodeProviderInterface;
  18  
  19  /**
  20   * SystemNodeProvider provides functionality to get the system node ID (MAC
  21   * address) using external system calls
  22   */
  23  class SystemNodeProvider implements NodeProviderInterface
  24  {
  25      /**
  26       * Returns the system node ID
  27       *
  28       * @return string|false System node ID as a hexadecimal string, or false if it is not found
  29       */
  30      public function getNode()
  31      {
  32          static $node = null;
  33  
  34          if ($node !== null) {
  35              return $node;
  36          }
  37  
  38          $pattern = '/[^:]([0-9A-Fa-f]{2}([:-])[0-9A-Fa-f]{2}(\2[0-9A-Fa-f]{2}){4})[^:]/';
  39          $matches = [];
  40  
  41          // first try a  linux specific way
  42          $node = $this->getSysfs();
  43  
  44          // Search the ifconfig output for all MAC addresses and return
  45          // the first one found
  46          if ($node === false) {
  47              if (preg_match_all($pattern, $this->getIfconfig(), $matches, PREG_PATTERN_ORDER)) {
  48                  $node = $matches[1][0];
  49              }
  50          }
  51          if ($node !== false) {
  52              $node = str_replace([':', '-'], '', $node);
  53          }
  54          return $node;
  55      }
  56  
  57      /**
  58       * Returns the network interface configuration for the system
  59       *
  60       * @codeCoverageIgnore
  61       * @return string
  62       */
  63      protected function getIfconfig()
  64      {
  65          if (strpos(strtolower(ini_get('disable_functions')), 'passthru') !== false) {
  66              return '';
  67          }
  68  
  69          ob_start();
  70          switch (strtoupper(substr(constant('PHP_OS'), 0, 3))) {
  71              case 'WIN':
  72                  passthru('ipconfig /all 2>&1');
  73                  break;
  74              case 'DAR':
  75                  passthru('ifconfig 2>&1');
  76                  break;
  77              case 'FRE':
  78                  passthru('netstat -i -f link 2>&1');
  79                  break;
  80              case 'LIN':
  81              default:
  82                  passthru('netstat -ie 2>&1');
  83                  break;
  84          }
  85  
  86          return ob_get_clean();
  87      }
  88  
  89      /**
  90       * Returns mac address from the first system interface via the sysfs interface
  91       *
  92       * @return string|bool
  93       */
  94      protected function getSysfs()
  95      {
  96          $mac = false;
  97  
  98          if (strtoupper(constant('PHP_OS')) === 'LINUX') {
  99              $addressPaths = glob('/sys/class/net/*/address', GLOB_NOSORT);
 100  
 101              if (empty($addressPaths)) {
 102                  return false;
 103              }
 104  
 105              $macs = [];
 106              array_walk($addressPaths, function ($addressPath) use (&$macs) {
 107                  if (is_readable($addressPath)) {
 108                      $macs[] = file_get_contents($addressPath);
 109                  }
 110              });
 111  
 112              $macs = array_map('trim', $macs);
 113  
 114              // remove invalid entries
 115              $macs = array_filter($macs, function ($mac) {
 116                  return
 117                      // localhost adapter
 118                      $mac !== '00:00:00:00:00:00' &&
 119                      // must match  mac adress
 120                      preg_match('/^([0-9a-f]{2}:){5}[0-9a-f]{2}$/i', $mac);
 121              });
 122  
 123              $mac = reset($macs);
 124          }
 125  
 126          return $mac;
 127      }
 128  }