librenms-librenms/includes/polling/netstats-tcp.inc.php

<?php

if ($device['os'] != "Snom")
{
  echo(" TCP");

  $oids = array ('tcpActiveOpens', 'tcpPassiveOpens', 'tcpAttemptFails', 'tcpEstabResets', 'tcpCurrEstab',
  'tcpInSegs', 'tcpOutSegs', 'tcpRetransSegs', 'tcpInErrs', 'tcpOutRsts');

#  $oids['tcp_collect'] = $oids['tcp'];
#  $oids['tcp_collect'][] = 'tcpHCInSegs';
#  $oids['tcp_collect'][] = 'tcpHCOutSegs';

  unset($snmpstring, $rrdupdate, $snmpdata, $snmpdata_cmd, $rrd_create);
  $rrd_file = $config['rrd_dir'] . "/" . $device['hostname'] . "/netstats-tcp.rrd";

  $rrd_create = "RRA:AVERAGE:0.5:1:600 RRA:AVERAGE:0.5:6:700 RRA:AVERAGE:0.5:24:775 RRA:AVERAGE:0.5:288:797 RRA:MAX:0.5:1:600 \
                 RRA:MAX:0.5:6:700 RRA:MAX:0.5:24:775 RRA:MAX:0.5:288:797";

  foreach ($oids as $oid)
  {
    $oid_ds = truncate($oid, 19, '');
    $rrd_create .= " DS:$oid_ds:COUNTER:600:U:10000000"; ## Limit to 10MPPS
    $snmpstring .= " $oid.0";
  }

  $snmpstring .= " tcpHCInSegs.0";
  $snmpstring .= " tcpHCOutSegs.0";

  $data = snmp_get_multi($device, $snmpstring);

  $rrdupdate = "N";

  foreach ($oids as $oid)
  {
    if (is_numeric($data[0][$oid]))
    {
      $value = $data[0][$oid];
    } else {
      $value = "0";
    }
    $rrdupdate .= ":$value";
  }

  unset($snmpstring);

  if (isset($data[0]['tcpInSegs']) && isset($data[0]['tcpOutSegs']))
  {
    if (!file_exists($rrd_file)) { rrdtool_create($rrd_file, $rrd_create); }
    rrdtool_update($rrd_file, $rrdupdate);
    $graphs['netstat_tcp'] = TRUE;
  }

  unset($oids, $data, $data_array, $oid, $protos);
}

?>