librenms-librenms/includes/discovery/ports.inc.php

<?php

# Discover ports

echo("Ports : ");

$ports = snmp_walk($device, "ifDescr", "-Onsq", "IF-MIB");

$ports = str_replace("\"", "", $ports);
$ports = str_replace("ifDescr.", "", $ports);
#$ports = str_replace(" ", "||", $ports);

$interface_ignored = 0;
$interface_added   = 0;

foreach (explode("\n", $ports) as $entry)
{
  $entry = trim($entry);
  list($ifIndex, $ifDescr) = explode(" ", $entry, 2);
  if (!strstr($entry, "irtual"))
  {
    $if = trim(strtolower($ifDescr));
    $nullintf = 0;
    foreach ($config['bad_if'] as $bi)
    {
      if (strstr($if, $bi))
      {
        $nullintf = 1;
        if($debug) { echo("ignored : $bi : $if"); }
      }
    }
    if (is_array($config['bad_if_regexp']))
    {
      foreach ($config['bad_if_regexp'] as $bi)
      {
        if (preg_match($bi ."i", $if))
        {
          $nullintf = 1;
          if($debug) { echo("ignored : $bi : $if"); }
        }
      }
    }

    if (empty($ifDescr)) { $nullintf = 1; }
    if ($device['os'] == "catos" && strstr($if, "vlan")) { $nullintf = 1; }
    if ($device['os'] == "vmware" && preg_match("/Device ([a-z0-9]+) at .*/", $ifDescr, $matches)) { $ifDescr = $matches[1]; }
    $ifDescr = fixifName($ifDescr);
    if ($debug) echo("\n $if ");
    if ($nullintf == 0)
    {
      if (mysql_result(mysql_query("SELECT COUNT(*) FROM `ports` WHERE `device_id` = '".$device['device_id']."' AND `ifIndex` = '$ifIndex'"), 0) == '0')
      {
        mysql_query("INSERT INTO `ports` (`device_id`,`ifIndex`,`ifDescr`) VALUES ('".$device['device_id']."','$ifIndex','".mres($ifDescr)."')");
        # Add Interface
        echo("+");
      } else {
        mysql_query("UPDATE `ports` SET `deleted` = '0' WHERE `device_id` = '".$device['device_id']."' AND `ifIndex` = '$ifIndex'");
        echo(".");
      }
      $int_exists[] = "$ifIndex";
    } else {
      # Ignored Interface
      if (mysql_result(mysql_query("SELECT COUNT(*) FROM `ports` WHERE `device_id` = '".$device['device_id']."' AND `ifIndex` = '$ifIndex'"), 0) != '0')
      {
        mysql_query("UPDATE `ports` SET `deleted` = '1' WHERE `device_id` = '".$device['device_id']."' AND `ifIndex` = '$ifIndex'");
        # Delete Interface
        echo("-"); ## Deleted Interface
      } else {
        echo("X"); ## Ignored Interface
      }
    }
  }
}

$sql = "SELECT * FROM `ports` WHERE `device_id`  = '".$device['device_id']."' AND `deleted` = '0'";
$query = mysql_query($sql);

while ($test_if = mysql_fetch_assoc($query))
{
  unset($exists);
  $i = 0;
  while ($i < count($int_exists) && !isset($exists))
  {
    $this_if = $test_if['ifIndex'];
    if ($int_exists[$i] == $this_if) { $exists = 1; }
    $i++;
  }
  if (!$exists)
  {
    echo("-");
    mysql_query("UPDATE `ports` SET `deleted` = '1' WHERE interface_id = '" . $test_if['interface_id'] . "'");
  }
}

unset($temp_exists);
echo("\n");

?>