librenms-librenms/includes/discovery/cisco-entity-sensor.inc.php

<?php

global $valid_sensor;

if ($device['os'] == "ios" || $device['os_group'] == "ios") 
{
  echo("\nCISCO-ENTITY-SENSOR");

  $oids = array();  
  echo("\nCaching OIDs:");

  if(!is_array($entity_array))
  {
    $entity_array = array();
    echo(" entPhysicalDescr");
    $entity_array = snmpwalk_cache_multi_oid($device, "entPhysicalDescr", $entity_array, "CISCO-ENTITY-SENSOR-MIB");
    echo(" entPhysicalName");
    $entity_array = snmpwalk_cache_multi_oid($device, "entPhysicalName", $entity_array, "CISCO-ENTITY-SENSOR-MIB");
  }

  echo("  entSensorType");
  $oids = snmpwalk_cache_multi_oid($device, "entSensorType", $oids, "CISCO-ENTITY-SENSOR-MIB");
  echo(" entSensorScale");
  $oids = snmpwalk_cache_multi_oid($device, "entSensorScale", $oids, "CISCO-ENTITY-SENSOR-MIB");
  echo(" entSensorValue");
  $oids = snmpwalk_cache_multi_oid($device, "entSensorValue", $oids, "CISCO-ENTITY-SENSOR-MIB");
  echo(" entSensorMeasuredEntity");
  $oids = snmpwalk_cache_multi_oid($device, "entSensorMeasuredEntity", $oids, "CISCO-ENTITY-SENSOR-MIB");
  echo(" entSensorPrecision");
  $oids = snmpwalk_cache_multi_oid($device, "entSensorPrecision", $oids, "CISCO-ENTITY-SENSOR-MIB");

  $t_oids = array();
  echo(" entSensorThresholdSeverity");
  $t_oids = snmpwalk_cache_twopart_oid($device, "entSensorThresholdSeverity", $t_oids, "CISCO-ENTITY-SENSOR-MIB");
  echo(" entSensorThresholdRelation");
  $t_oids = snmpwalk_cache_twopart_oid($device, "entSensorThresholdRelation", $t_oids, "CISCO-ENTITY-SENSOR-MIB");
  echo(" entSensorThresholdValue");
  $t_oids = snmpwalk_cache_twopart_oid($device, "entSensorThresholdValue", $t_oids, "CISCO-ENTITY-SENSOR-MIB");

  echo("\nSensors: ");


  if($debug) { print_r($oids); } 

  $entitysensor['voltsDC']   = "voltage";
  $entitysensor['voltsAC']   = "voltage";
  $entitysensor['amperes']   = "current";
  $entitysensor['watt']      = "power";
  $entitysensor['hertz']     = "freq";
  $entitysensor['percentRH'] = "humidity";
  $entitysensor['rpm']       = "fanspeed";
  $entitysensor['celsius']   = "temperature";
  $entitysensor['watts']     = "watts";

  if(is_array($oids))
  {
    foreach($oids as $index => $entry)
    {
      #echo("[" . $entry['entSensorType'] . "|" . $entry['entSensorValue']. "|" . $index . "]");

      if($entitysensor[$entry['entSensorType']] && is_numeric($entry['entSensorValue']) && is_numeric($index))
      {
        $entPhysicalIndex = $index;
	$descr = $entity_array[$index]['entPhysicalName'];
        if($descr || $device['os'] == "iosxr") 
        { 
          $descr = rewrite_entity_descr($descr);
        } else { 
          $descr = $entity_array[$index]['entPhysicalDescr']; 
          $descr = rewrite_entity_descr($descr);
        }

        ## Set description based on measured entity if it exists
        if(is_numeric($entry['entSensorMeasuredEntity']) && $entry['entSensorMeasuredEntity']) {
          $measured_descr = $entity_array[$entry['entSensorMeasuredEntity']]['entPhysicalName'];
          if(!measured_descr) 
          {
            $measured_descr = $entity_array[$entry['entSensorMeasuredEntity']]['entPhysicalDescr'];
          }          
          $descr = $measured_descr . " - " . $descr;
        }

        ### Bit dirty also, clean later
	$descr = str_replace("Temp: ", "", $descr);
        $descr = str_ireplace("temperature ", "", $descr); 

        $oid = ".1.3.6.1.4.1.9.9.91.1.1.1.1.4.".$index;
        $current = $entry['entSensorValue'];
        $type = $entitysensor[$entry['entSensorType']];

        #echo("$index : ".$entry['entSensorScale']."|");
        ### FIXME this stuff is foul
        if($entry['entSensorScale'] == "nano")  { $divisor = "1000000000"; $multiplier = "1";  }
        if($entry['entSensorScale'] == "micro") { $divisor = "1000000"; $multiplier = "1";  }
        if($entry['entSensorScale'] == "milli") { $divisor = "1000"; $multiplier = "1";  }
        if($entry['entSensorScale'] == "units") { $divisor = "1"; $multiplier = "1";  }
        if($entry['entSensorScale'] == "kilo")  { $divisor = "1"; $multiplier = "1000";  }
        if($entry['entSensorScale'] == "mega")  { $divisor = "1"; $multiplier = "1000000";  }
        if($entry['entSensorScale'] == "giga")  { $divisor = "1"; $multiplier = "1000000000";  }
        if(is_numeric($entry['entSensorPrecision']) && $entry['entSensorPrecision'] > "0") { $divisor = $divisor . str_pad('', $entry['entSensorPrecision'], "0"); }
        $current = $current * $multiplier / $divisor;

        ### Set thresholds to null
        $limit = NULL; $low_limit = NULL; $warn_limit = NULL; $warn_limit_low = NULL;

        ### Check thresholds for this entry (bit dirty, but it works!)
        if(is_array($t_oids[$index])) 
        {
         foreach($t_oids[$index] as $t_index => $entry)
         {
          ### Critical Limit
          if($entry['entSensorThresholdSeverity'] == "major" && $entry['entSensorThresholdRelation'] == "greaterOrEqual")
          {
            $limit = $entry['entSensorThresholdValue'] * $multiplier / $divisor;
          }

          if($entry['entSensorThresholdSeverity'] == "major" && $entry['entSensorThresholdRelation'] == "lessOrEqual")
          {
            $limit_low = $entry['entSensorThresholdValue'] * $multiplier / $divisor;
          }
          ### Warning Limit
          if($entry['entSensorThresholdSeverity'] == "minor" && $entry['entSensorThresholdRelation'] == "greaterOrEqual")
          {
            $warn_limit = $entry['entSensorThresholdValue'] * $multiplier / $divisor;
          }

          if($entry['entSensorThresholdSeverity'] == "minor" && $entry['entSensorThresholdRelation'] == "lessOrEqual")
          {
            $warn_limit_low = $entry['entSensorThresholdValue'] * $multiplier / $divisor;
          }
         }
        }
        ### End Threshold code

        $ok = TRUE;
       
	if($current == "-127") { $ok = FALSE; }                      	## False reading
#        if($type == "temperature" && $current < 1) { $ok = FALSE; }	## False reading. Temperature <1 :)
	if($descr == "") { $ok = FALSE; }				## Invalid description. Lots of these on Nexus

        if($ok) {
#          echo("\n$valid_sensor, $type, $device, $oid, $index, 'cisco-entity-sensor', $descr, $divisor, $multiplier, $limit_low, $warn_limit_low, $limit, $warn_limit, $current");
          discover_sensor($valid_sensor, $type, $device, $oid, $index, 'cisco-entity-sensor', $descr, $divisor, $multiplier, $limit_low, $warn_limit_low, $limit, $warn_limit, $current);
        }
        $cisco_entity_temperature = 1;
        unset($limit, $limit_low, $warn_limit, $warn_limit_low);

      }
    }
  }
}

?>