source: trunk/Modules/NetworkConfigLinux/Generators/Latency.php

<?php

class ConfigLatency extends NetworkConfigItem
{
  function PingHosts(): void
  {
    $Timeout = 2000; // ms
    $RetryLimit = 1;
    $Hosts = array();
    $HostInterface = array();
    $Time = time();
    $DbResult = $this->Database->query('SELECT `NetworkInterface`.`Id`, '.
      '`NetworkInterface`.`LocalIP` '.
      'FROM `NetworkInterface` '.
      'WHERE (`NetworkInterface`.`Enabled`=1) AND (`NetworkInterface`.`LocalIP` !="")');
    while ($DbRow = $DbResult->fetch_assoc())
    {
      $Hosts[] = $DbRow['LocalIP'];
      $HostInterface[$DbRow['LocalIP']] = $DbRow['Id'];
    }

    exec('fping -e -r '.$RetryLimit.' -t '.$Timeout.' -a '.implode(' ', $Hosts).' 2>/dev/null', $Output);

    $Queries = array();
    foreach ($Output as $Index => $Line)
    {
      $IP = substr($Line, 0, strPos($Line, ' '));
      $Line = substr($Line, strpos($Line, '(') + 1);
      $Value = substr($Line, 0, strpos($Line, ' '));
      $Queries[] = $this->Database->GetInsert('NetworkInterfaceLatency', array('Interface' => $HostInterface[$IP],
        'Value' => $Value, 'Time' => TimeToMysqlDateTime($Time)));
    }
    $this->Database->Transaction($Queries);
  }

  function Run(): void
  {
    RepeatFunction(10 * 60, array($this, 'PingHosts'));
  }
}