librenms/includes/discovery/ipv4-addresses.inc.php

<?php

echo("IPv4 Addresses : ");

$oids = trim(snmp_walk($device,"ipAdEntIfIndex","-Osq","IP-MIB"));
$oids = str_replace("ipAdEntIfIndex.", "", $oids);
foreach (explode("\n", $oids) as $data)
{
  $data = trim($data);
  list($oid,$ifIndex) = explode(" ", $data);
  $mask = trim(snmp_get($device,"ipAdEntNetMask.$oid","-Oqv","IP-MIB"));
  $addr = Net_IPv4::parseAddress("$oid/$mask");
  $network = $addr->network . "/" . $addr->bitmask;
  $cidr = $addr->bitmask;

  if (dbFetchCell("SELECT COUNT(*) FROM `ports` WHERE device_id = ? AND `ifIndex` = ?",array($device['device_id'], $ifIndex)) != '0' && $oid != "0.0.0.0" && $oid != 'ipAdEntIfIndex')
  {
    $port_id = dbFetchCell("SELECT `port_id` FROM `ports` WHERE `device_id` = ? AND `ifIndex` = ?",array($device['device_id'], $ifIndex));

    if (dbFetchCell("SELECT COUNT(*) FROM `ipv4_networks` WHERE `ipv4_network` = ?",array($network)) < '1')
    {
      dbInsert(array('ipv4_network' => $network), 'ipv4_networks');
      #echo("Create Subnet $network\n");
      echo("S");
    }

    $ipv4_network_id = dbFetchCell("SELECT `ipv4_network_id` FROM `ipv4_networks` WHERE `ipv4_network` = ?",array($network));

    if (dbFetchCell("SELECT COUNT(*) FROM `ipv4_addresses` WHERE `ipv4_address` = ? AND `ipv4_prefixlen` = ? AND `port_id` = ?",array($oid,$cidr,$port_id)) == '0')
    {
      dbInsert(array('ipv4_address' => $oid, 'ipv4_prefixlen' => $cidr, 'ipv4_network_id' => $ipv4_network_id,'port_id' => $port_id), 'ipv4_addresses');
      #echo("Added $oid/$cidr to $port_id ( $hostname $ifIndex )\n $i_query\n");
      echo("+");
    } else { echo("."); }

    $full_address = "$oid/$cidr|$ifIndex";
    $valid_v4[$full_address] = 1;
  } else { echo("!"); }
}

$sql   = "SELECT * FROM ipv4_addresses AS A, ports AS I WHERE I.device_id = '".$device['device_id']."' AND  A.port_id = I.port_id";
foreach (dbFetchRows($sql) as $row)
{
  $full_address = $row['ipv4_address'] . "/" . $row['ipv4_prefixlen'] . "|" . $row['ifIndex'];

  if (!$valid_v4[$full_address])
  {
    echo("-");
    $query = dbDelete('ipv4_addresses', '`ipv4_address_id` = ?', array($row['ipv4_address_id']));
    if (!dbFetchCell("SELECT COUNT(*) FROM `ipv4_addresses` WHERE `ipv4_network_id` = ?",array($row['ipv4_network_id'])))
    {
      $query = dbDelete('ipv4_networks', '`ipv4_network_id` = ?', array($row['ipv4_network_id']));
    }
  }
}

echo("\n");

unset($valid_v4);

?>