<?php

/*
 * Observium Network Management and Monitoring System
 * Copyright (C) 2006-2011, Observium Developers - http://www.observium.org
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * See COPYING for more details.
 */


function discover_new_device($hostname, $device='', $method='', $interface='') {
    global $config, $debug;

    if (!empty($config['mydomain']) && isDomainResolves($hostname.'.'.$config['mydomain'])) {
        $dst_host = $hostname.'.'.$config['mydomain'];
    }
    else {
        $dst_host = $hostname;
    }

    if ($debug) {
        echo "discovering $dst_host\n";
    }

    $ip = gethostbyname($dst_host);
    if (filter_var($ip, FILTER_VALIDATE_IP, FILTER_FLAG_IPV4) === false && filter_var($ip, FILTER_VALIDATE_IP, FILTER_FLAG_IPV6) === false) {
        // $ip isn't a valid IP so it must be a name.
        if ($ip == $dst_host) {
            if ($debug) {
                echo "name lookup of $dst_host failed\n";
            }

            return false;
        }
    }

    if ($debug) {
        echo "ip lookup result: $ip\n";
    }

    $dst_host = rtrim($dst_host, '.');
    // remove trailing dot
    if (match_network($config['autodiscovery']['nets-exclude'], $ip)) {
        if ($debug) {
            echo "$ip in an excluded network - skipping\n";
        }

        return false;
    }

    if (match_network($config['nets'], $ip)) {
        $remote_device_id = addHost($dst_host, '', '161', 'udp', '0', $config['distributed_poller_group']);
        if ($remote_device_id) {
            $remote_device = device_by_id_cache($remote_device_id, 1);
            echo '+['.$remote_device['hostname'].'('.$remote_device['device_id'].')]';
            discover_device($remote_device);
            device_by_id_cache($remote_device_id, 1);
            if ($remote_device_id && is_array($device) && !empty($method)) {
                $extra_log = '';
                $int       = ifNameDescr($interface);
                if (is_array($int)) {
                    $extra_log = ' (port '.$int['label'].') ';
                }

                log_event('Device $'.$remote_device['hostname']." ($ip) $extra_log autodiscovered through $method on ".$device['hostname'], $remote_device_id, 'system');
            }
            else {
                log_event("$method discovery of ".$remote_device['hostname']." ($ip) failed - check ping and SNMP access", $device['device_id'], 'system');
            }

            return $remote_device_id;
        }
    }
    else {
        if ($debug) {
            echo "$ip not in a matched network - skipping\n";
        }
    }//end if

}//end discover_new_device()


function discover_device($device, $options=null) {
    global $config, $valid;

    $valid = array();
    // Reset $valid array
    $attribs = get_dev_attribs($device['device_id']);

    $device_start = utime();
    // Start counting device poll time
    echo $device['hostname'].' '.$device['device_id'].' '.$device['os'].' ';

    if ($device['os'] == 'generic') {
        // verify if OS has changed from generic
        $device['os'] = getHostOS($device);
        if ($device['os'] != 'generic') {
            echo "\nDevice os was updated to ".$device['os'].'!';
            dbUpdate(array('os' => $device['os']), 'devices', '`device_id` = ?', array($device['device_id']));
        }
    }

    if ($config['os'][$device['os']]['group']) {
        $device['os_group'] = $config['os'][$device['os']]['group'];
        echo ' ('.$device['os_group'].')';
    }

    echo "\n";

    // If we've specified modules, use them, else walk the modules array
    if ($options['m']) {
        foreach (explode(',', $options['m']) as $module) {
            if (is_file("includes/discovery/$module.inc.php")) {
                include "includes/discovery/$module.inc.php";
            }
        }
    }
    else {
        foreach ($config['discovery_modules'] as $module => $module_status) {
            if ($attribs['discover_'.$module] || ( $module_status && !isset($attribs['discover_'.$module]))) {
                include 'includes/discovery/'.$module.'.inc.php';
            }
            else if (isset($attribs['discover_'.$module]) && $attribs['discover_'.$module] == '0') {
                echo "Module [ $module ] disabled on host.\n";
            }
            else {
                echo "Module [ $module ] disabled globally.\n";
            }
        }
    }

    // Set type to a predefined type for the OS if it's not already set
    if ($device['type'] == 'unknown' || $device['type'] == '') {
        if ($config['os'][$device['os']]['type']) {
            $device['type'] = $config['os'][$device['os']]['type'];
        }
    }

    $device_end  = utime();
    $device_run  = ($device_end - $device_start);
    $device_time = substr($device_run, 0, 5);

    dbUpdate(array('last_discovered' => array('NOW()'), 'type' => $device['type'], 'last_discovered_timetaken' => $device_time), 'devices', '`device_id` = ?', array($device['device_id']));

    echo "Discovered in $device_time seconds\n";

    global $discovered_devices;

    echo "\n";
    $discovered_devices++;

}//end discover_device()


// Discover sensors


function discover_sensor(&$valid, $class, $device, $oid, $index, $type, $descr, $divisor='1', $multiplier='1', $low_limit=null, $low_warn_limit=null, $warn_limit=null, $high_limit=null, $current=null, $poller_type='snmp', $entPhysicalIndex=null, $entPhysicalIndex_measured=null) {
    global $config, $debug;

    if ($debug) {
        echo "Discover sensor: $oid, $index, $type, $descr, $poller_type, $precision, $entPhysicalIndex\n";
    }

    if (is_null($low_warn_limit) && !is_null($warn_limit)) {
        // Warn limits only make sense when we have both a high and a low limit
        $low_warn_limit = null;
        $warn_limit     = null;
    }
    else if ($low_warn_limit > $warn_limit) {
        // Fix high/low thresholds (i.e. on negative numbers)
        list($warn_limit, $low_warn_limit) = array($low_warn_limit, $warn_limit);
    }

    if (dbFetchCell('SELECT COUNT(sensor_id) FROM `sensors` WHERE `poller_type`= ? AND `sensor_class` = ? AND `device_id` = ? AND sensor_type = ? AND `sensor_index` = ?', array($poller_type, $class, $device['device_id'], $type, $index)) == '0') {
        if (!$high_limit) {
            $high_limit = sensor_limit($class, $current);
        }

        if (!$low_limit) {
            $low_limit = sensor_low_limit($class, $current);
        }

        if ($low_limit > $high_limit) {
            // Fix high/low thresholds (i.e. on negative numbers)
            list($high_limit, $low_limit) = array($low_limit, $high_limit);
        }

        $insert = array(
            'poller_type'               => $poller_type,
            'sensor_class'              => $class,
            'device_id'                 => $device['device_id'],
            'sensor_oid'                => $oid,
            'sensor_index'              => $index,
            'sensor_type'               => $type,
            'sensor_descr'              => $descr,
            'sensor_divisor'            => $divisor,
            'sensor_multiplier'         => $multiplier,
            'sensor_limit'              => $high_limit,
            'sensor_limit_warn'         => $warn_limit,
            'sensor_limit_low'          => $low_limit,
            'sensor_limit_low_warn'     => $low_warn_limit,
            'sensor_current'            => $current,
            'entPhysicalIndex'          => $entPhysicalIndex,
            'entPhysicalIndex_measured' => $entPhysicalIndex_measured,
        );

        foreach ($insert as $key => $val_check) {
            if (!isset($val_check)) {
                unset($insert[$key]);
            }
        }

        $inserted = dbInsert($insert, 'sensors');

        if ($debug) {
            echo "( $inserted inserted )\n";
        }

        echo '+';
        log_event('Sensor Added: '.mres($class).' '.mres($type).' '.mres($index).' '.mres($descr), $device, 'sensor', $inserted);
    }
    else {
        $sensor_entry = dbFetchRow('SELECT * FROM `sensors` WHERE `sensor_class` = ? AND `device_id` = ? AND `sensor_type` = ? AND `sensor_index` = ?', array($class, $device['device_id'], $type, $index));

        if (!isset($high_limit)) {
            if (!$sensor_entry['sensor_limit']) {
                // Calculate a reasonable limit
                $high_limit = sensor_limit($class, $current);
            }
            else {
                // Use existing limit
                $high_limit = $sensor_entry['sensor_limit'];
            }
        }

        if (!isset($low_limit)) {
            if (!$sensor_entry['sensor_limit_low']) {
                // Calculate a reasonable limit
                $low_limit = sensor_low_limit($class, $current);
            }
            else {
                // Use existing limit
                $low_limit = $sensor_entry['sensor_limit_low'];
            }
        }

        // Fix high/low thresholds (i.e. on negative numbers)
        if ($low_limit > $high_limit) {
            list($high_limit, $low_limit) = array($low_limit, $high_limit);
        }

        if ($high_limit != $sensor_entry['sensor_limit'] && $sensor_entry['sensor_custom'] == 'No') {
            $update  = array('sensor_limit' => ($high_limit == null ? array('NULL') : $high_limit));
            $updated = dbUpdate($update, 'sensors', '`sensor_id` = ?', array($sensor_entry['sensor_id']));
            if ($debug) {
                echo "( $updated updated )\n";
            }

            echo 'H';
            log_event('Sensor High Limit Updated: '.mres($class).' '.mres($type).' '.mres($index).' '.mres($descr).' ('.$high_limit.')', $device, 'sensor', $sensor_id);
        }

        if ($sensor_entry['sensor_limit_low'] != $low_limit && $sensor_entry['sensor_custom'] == 'No') {
            $update  = array('sensor_limit_low' => ($low_limit == null ? array('NULL') : $low_limit));
            $updated = dbUpdate($update, 'sensors', '`sensor_id` = ?', array($sensor_entry['sensor_id']));
            if ($debug) {
                echo "( $updated updated )\n";
            }

            echo 'L';
            log_event('Sensor Low Limit Updated: '.mres($class).' '.mres($type).' '.mres($index).' '.mres($descr).' ('.$low_limit.')', $device, 'sensor', $sensor_id);
        }

        if ($warn_limit != $sensor_entry['sensor_limit_warn'] && $sensor_entry['sensor_custom'] == 'No') {
            $update  = array('sensor_limit_warn' => ($warn_limit == null ? array('NULL') : $warn_limit));
            $updated = dbUpdate($update, 'sensors', '`sensor_id` = ?', array($sensor_entry['sensor_id']));
            if ($debug) {
                echo "( $updated updated )\n";
            }

            echo 'WH';
            log_event('Sensor Warn High Limit Updated: '.mres($class).' '.mres($type).' '.mres($index).' '.mres($descr).' ('.$warn_limit.')', $device, 'sensor', $sensor_id);
        }

        if ($sensor_entry['sensor_limit_low_warn'] != $low_warn_limit && $sensor_entry['sensor_custom'] == 'No') {
            $update  = array('sensor_limit_low_warn' => ($low_warn_limit == null ? array('NULL') : $low_warn_limit));
            $updated = dbUpdate($update, 'sensors', '`sensor_id` = ?', array($sensor_entry['sensor_id']));
            if ($debug) {
                echo "( $updated updated )\n";
            }

            echo 'WL';
            log_event('Sensor Warn Low Limit Updated: '.mres($class).' '.mres($type).' '.mres($index).' '.mres($descr).' ('.$low_warn_limit.')', $device, 'sensor', $sensor_id);
        }

        if ($oid == $sensor_entry['sensor_oid'] && $descr == $sensor_entry['sensor_descr'] && $multiplier == $sensor_entry['sensor_multiplier'] && $divisor == $sensor_entry['sensor_divisor'] && $entPhysicalIndex_measured == $sensor_entry['entPhysicalIndex_measured'] && $entPhysicalIndex == $sensor_entry['entPhysicalIndex']) {
            echo '.';
        }
        else {
            $update  = array(
                'sensor_oid'                => $oid,
                'sensor_descr'              => $descr,
                'sensor_multiplier'         => $multiplier,
                'sensor_divisor'            => $divisor,
                'entPhysicalIndex'          => $entPhysicalIndex,
                'entPhysicalIndex_measured' => $entPhysicalIndex_measured,
            );
            $updated = dbUpdate($update, 'sensors', '`sensor_id` = ?', array($sensor_entry['sensor_id']));
            echo 'U';
            log_event('Sensor Updated: '.mres($class).' '.mres($type).' '.mres($index).' '.mres($descr), $device, 'sensor', $sensor_id);
            if ($debug) {
                echo "( $updated updated )\n";
            }
        }
    }//end if
    $valid[$class][$type][$index] = 1;

}//end discover_sensor()


function sensor_low_limit($class, $current) {
    $limit = null;

    switch ($class) {
    case 'temperature':
        $limit = ($current * 0.7);
        break;

    case 'voltage':
        if ($current < 0) {
            $limit = ($current * (1 + (sgn($current) * 0.15)));
        }
        else {
            $limit = ($current * (1 - (sgn($current) * 0.15)));
        }
        break;

    case 'humidity':
        $limit = '70';
        break;

    case 'frequency':
        $limit = ($current * 0.95);
        break;

    case 'current':
        $limit = null;
        break;

    case 'fanspeed':
        $limit = ($current * 0.80);
        break;

    case 'power':
        $limit = null;
        break;
    }//end switch

    return $limit;

}//end sensor_low_limit()


function sensor_limit($class, $current) {
    $limit = null;

    switch ($class) {
    case 'temperature':
        $limit = ($current * 1.60);
        break;

    case 'voltage':
        if ($current < 0) {
            $limit = ($current * (1 - (sgn($current) * 0.15)));
        }
        else {
            $limit = ($current * (1 + (sgn($current) * 0.15)));
        }
        break;

    case 'humidity':
        $limit = '70';
        break;

    case 'frequency':
        $limit = ($current * 1.05);
        break;

    case 'current':
        $limit = ($current * 1.50);
        break;

    case 'fanspeed':
        $limit = ($current * 1.80);
        break;

    case 'power':
        $limit = ($current * 1.50);
        break;
    }//end switch

    return $limit;

}//end sensor_limit()


function check_valid_sensors($device, $class, $valid, $poller_type='snmp') {
    $entries = dbFetchRows('SELECT * FROM sensors AS S, devices AS D WHERE S.sensor_class=? AND S.device_id = D.device_id AND D.device_id = ? AND S.poller_type = ?', array($class, $device['device_id'], $poller_type));

    if (count($entries)) {
        foreach ($entries as $entry) {
            $index = $entry['sensor_index'];
            $type  = $entry['sensor_type'];
            if ($debug) {
                echo $index.' -> '.$type."\n";
            }

            if (!$valid[$class][$type][$index]) {
                echo '-';
                dbDelete('sensors', '`sensor_id` =  ?', array($entry['sensor_id']));
                log_event('Sensor Deleted: '.$entry['sensor_class'].' '.$entry['sensor_type'].' '.$entry['sensor_index'].' '.$entry['sensor_descr'], $device, 'sensor', $sensor_id);
            }

            unset($oid);
            unset($type);
        }
    }

}//end check_valid_sensors()


function discover_juniAtmVp(&$valid, $port_id, $vp_id, $vp_descr) {
    global $config, $debug;

    if (dbFetchCell('SELECT COUNT(*) FROM `juniAtmVp` WHERE `port_id` = ? AND `vp_id` = ?', array($port_id, $vp_id)) == '0') {
        $inserted = dbInsert(array('port_id' => $port_id, 'vp_id' => $vp_id, 'vp_descr' => $vp_descr), 'juniAtmVp');
        if ($debug) {
            echo "( $inserted inserted )\n";
        }

        // FIXME vv no $device!
        log_event('Juniper ATM VP Added: port '.mres($port_id).' vp '.mres($vp_id).' descr'.mres($vp_descr), 'juniAtmVp', $inserted);
    }
    else {
        echo '.';
    }

    $valid[$port_id][$vp_id] = 1;

}//end discover_juniAtmVp()


function discover_link($local_port_id, $protocol, $remote_port_id, $remote_hostname, $remote_port, $remote_platform, $remote_version, $local_device_id, $remote_device_id) {
    global $config, $debug, $link_exists;

    if ($debug) {
        echo "\n";
        var_dump($local_port_id, $protocol, $remote_port_id, $remote_hostname, $remote_port, $remote_platform, $remote_version);
    }

    if (dbFetchCell(
        'SELECT COUNT(*) FROM `links` WHERE `remote_hostname` = ? AND `local_port_id` = ? AND `protocol` = ? AND `remote_port` = ?',
        array(
            $remote_hostname,
            $local_port_id,
            $protocol,
            $remote_port,
        )
    ) == '0') {
        $insert_data = array(
            'local_port_id'    => $local_port_id,
            'local_device_id'  => $local_device_id,
            'protocol'         => $protocol,
            'remote_hostname'  => $remote_hostname,
            'remote_device_id' => $remote_device_id,
            'remote_port'      => $remote_port,
            'remote_platform'  => $remote_platform,
            'remote_version'   => $remote_version,
        );

        if (!empty($remote_port_id)) {
            $insert_data['remote_port_id'] = $remote_port_id;
        }

        $inserted = dbInsert($insert_data, 'links');

        echo '+';
        if ($debug) {
            echo "( $inserted inserted )";
        }
    }
    else {
        $data = dbFetchRow('SELECT * FROM `links` WHERE `remote_hostname` = ? AND `local_port_id` = ? AND `protocol` = ? AND `remote_port` = ?', array($remote_hostname, $local_port_id, $protocol, $remote_port));
        if ($data['remote_port_id'] == $remote_port_id && $data['remote_platform'] == $remote_platform && $remote_version == $remote_version && $data['local_device_id'] > 0 && $data['remote_device_id'] > 0) {
            echo '.';
        }
        else {
            $update_data = array(
                'remote_platform'  => $remote_platform,
                'remote_version'   => $remote_version,
                'remote_version'   => $remote_version,
                'local_device_id'  => $local_device_id,
                'remote_device_id' => $remote_device_id,
            );

            if (!empty($remote_port_id)) {
                $update_data['remote_port_id'] = $remote_port_id;
            }

            $updated = dbUpdate($update_data, 'links', '`id` = ?', array($data['id']));
            echo 'U';
            if ($debug) {
                echo "( $updated updated )";
            }
        }//end if
    }//end if
    $link_exists[$local_port_id][$remote_hostname][$remote_port] = 1;

}//end discover_link()


function discover_storage(&$valid, $device, $index, $type, $mib, $descr, $size, $units, $used=null) {
    global $config, $debug;

    if ($debug) {
        echo "$device, $index, $type, $mib, $descr, $units, $used, $size\n";
    }

    if ($descr && $size > '0') {
        $storage = dbFetchRow('SELECT * FROM `storage` WHERE `storage_index` = ? AND `device_id` = ? AND `storage_mib` = ?', array($index, $device['device_id'], $mib));
        if ($storage === false || !count($storage)) {
            $insert = dbInsert(
                array(
                    'device_id'     => $device['device_id'],
                    'storage_descr' => $descr,
                    'storage_index' => $index,
                    'storage_mib'   => $mib,
                    'storage_type'  => $type,
                    'storage_units' => $units,
                    'storage_size'  => $size,
                    'storage_used'  => $used,
                ),
                'storage'
            );
            if ($debug) {
                mysql_error();
            }

            echo '+';
        }
        else {
            $updated = dbUpdate(array('storage_descr' => $descr, 'storage_type' => $type, 'storage_units' => $units, 'storage_size' => $size), 'storage', '`device_id` = ? AND `storage_index` = ? AND `storage_mib` = ?', array($device['device_id'], $index, $mib));
            if ($updated) {
                echo 'U';
            }
            else {
                echo '.';
            }
        }//end if

        $valid[$mib][$index] = 1;
    }//end if

}//end discover_storage()


function discover_processor(&$valid, $device, $oid, $index, $type, $descr, $precision='1', $current=null, $entPhysicalIndex=null, $hrDeviceIndex=null) {
    global $config, $debug;

    if ($debug) {
        echo "$device, $oid, $index, $type, $descr, $precision, $current, $entPhysicalIndex, $hrDeviceIndex\n";
    }

    if ($descr) {
        $descr = trim(str_replace('"', '', $descr));
        if (dbFetchCell('SELECT COUNT(processor_id) FROM `processors` WHERE `processor_index` = ? AND `device_id` = ? AND `processor_type` = ?', array($index, $device['device_id'], $type)) == '0') {
            $insert_data = array(
                'device_id'           => $device['device_id'],
                'processor_descr'     => $descr,
                'processor_index'     => $index,
                'processor_oid'       => $oid,
                'processor_usage'     => $current,
                'processor_type'      => $type,
                'processor_precision' => $precision,
            );
            if (!empty($hrDeviceIndex)) {
                $insert_data['hrDeviceIndex'] = $hrDeviceIndex;
            }

            if (!empty($entPhysicalIndex)) {
                $insert_data['entPhysicalIndex'] = $entPhysicalIndex;
            }

            $inserted = dbInsert($insert_data, 'processors');
            echo '+';
            log_event('Processor added: type '.mres($type).' index '.mres($index).' descr '.mres($descr), $device, 'processor', $inserted);
        }
        else {
            echo '.';
            $update_data = array(
                'processor_descr'     => $descr,
                'processor_oid'       => $oid,
                'processor_usage'     => $current,
                'processor_precision' => $precision,
            );
            dbUpdate($update_data, 'processors', '`device_id`=? AND `processor_index`=? AND `processor_type`=?', array($device['device_id'], $index, $type));
            if ($debug) {
                print $query."\n";
            }
        }//end if
        $valid[$type][$index] = 1;
    }//end if

}//end discover_processor()


function discover_mempool(&$valid, $device, $index, $type, $descr, $precision='1', $entPhysicalIndex=null, $hrDeviceIndex=null) {
    global $config, $debug;

    if ($debug) {
        echo "$device, $oid, $index, $type, $descr, $precision, $current, $entPhysicalIndex, $hrDeviceIndex\n";
    }

    // FIXME implement the mempool_perc, mempool_used, etc.
    if ($descr) {
        if (dbFetchCell('SELECT COUNT(mempool_id) FROM `mempools` WHERE `mempool_index` = ? AND `device_id` = ? AND `mempool_type` = ?', array($index, $device['device_id'], $type)) == '0') {
            $insert_data = array(
                'device_id'         => $device['device_id'],
                'mempool_descr'     => $descr,
                'mempool_index'     => $index,
                'mempool_type'      => $type,
                'mempool_precision' => $precision,
                'mempool_perc'      => 0,
                'mempool_used'      => 0,
                'mempool_free'      => 0,
                'mempool_total'     => 0,
            );

            if (!empty($entPhysicalIndex)) {
                $insert_data['entPhysicalIndex'] = $entPhysicalIndex;
            }

            if (!empty($hrDeviceIndex)) {
                $insert_data['hrDeviceIndex'] = $hrDeviceIndex;
            }

            $inserted = dbInsert($insert_data, 'mempools');
            echo '+';
            log_event('Memory pool added: type '.mres($type).' index '.mres($index).' descr '.mres($descr), $device, 'mempool', $inserted);
        }
        else {
            echo '.';
            $update_data['mempool_descr'] = $descr;

            if (!empty($entPhysicalIndex)) {
                $update_data['entPhysicalIndex'] = $entPhysicalIndex;
            }

            if (!empty($hrDeviceIndex)) {
                $update_data['hrDeviceIndex'] = $hrDeviceIndex;
            }

            dbUpdate($update_data, 'mempools', 'device_id=? AND mempool_index=? AND mempool_type=?', array($device['device_id'], $index, $type));
            if ($debug) {
                print $query."\n";
            }
        }//end if
        $valid[$type][$index] = 1;
    }//end if

}//end discover_mempool()


function discover_toner(&$valid, $device, $oid, $index, $type, $descr, $capacity_oid=null, $capacity=null, $current=null) {
    global $config, $debug;

    if ($debug) {
        echo "$oid, $index, $type, $descr, $capacity, $capacity_oid\n";
    }

    if (dbFetchCell('SELECT COUNT(toner_id) FROM `toner` WHERE device_id = ? AND toner_type = ? AND `toner_index` = ? AND `toner_capacity_oid` =?', array($device['device_id'], $type, $index, $capacity_oid)) == '0') {
        $inserted = dbInsert(array('device_id' => $device['device_id'], 'toner_oid' => $oid, 'toner_capacity_oid' => $capacity_oid, 'toner_index' => $index, 'toner_type' => $type, 'toner_descr' => $descr, 'toner_capacity' => $capacity, 'toner_current' => $current), 'toner');
        echo '+';
        log_event('Toner added: type '.mres($type).' index '.mres($index).' descr '.mres($descr), $device, 'toner', $inserted);
    }
    else {
        $toner_entry = dbFetchRow('SELECT * FROM `toner` WHERE `device_id` = ? AND `toner_type` = ? AND `toner_index` =?', array($device['device_id'], $type, $index));
        if ($oid == $toner_entry['toner_oid'] && $descr == $toner_entry['toner_descr'] && $capacity == $toner_entry['toner_capacity'] && $capacity_oid == $toner_entry['toner_capacity_oid']) {
            echo '.';
        }
        else {
            dbUpdate(array('toner_descr' => $descr, 'toner_oid' => $oid, 'toner_capacity_oid' => $capacity_oid, 'toner_capacity' => $capacity), 'toner', 'device_id=? AND toner_type=? AND `toner_index`=?', array($device['device_id'], $type, $index));
            echo 'U';
        }
    }

    $valid[$type][$index] = 1;

}//end discover_toner()


function discover_process_ipv6(&$valid, $ifIndex, $ipv6_address, $ipv6_prefixlen, $ipv6_origin) {
    global $device,$config;

    $ipv6_network    = Net_IPv6::getNetmask("$ipv6_address/$ipv6_prefixlen").'/'.$ipv6_prefixlen;
    $ipv6_compressed = Net_IPv6::compress($ipv6_address);

    if (Net_IPv6::getAddressType($ipv6_address) == NET_IPV6_LOCAL_LINK) {
        // ignore link-locals (coming from IPV6-MIB)
        return;
    }

    if (dbFetchCell('SELECT COUNT(*) FROM `ports` WHERE device_id = ? AND `ifIndex` = ?', array($device['device_id'], $ifIndex)) != '0' && $ipv6_prefixlen > '0' && $ipv6_prefixlen < '129' && $ipv6_compressed != '::1') {
        $port_id = dbFetchCell('SELECT port_id FROM `ports` WHERE device_id = ? AND ifIndex = ?', array($device['device_id'], $ifIndex));
        if (dbFetchCell('SELECT COUNT(*) FROM `ipv6_networks` WHERE `ipv6_network` = ?', array($ipv6_network)) < '1') {
            dbInsert(array('ipv6_network' => $ipv6_network), 'ipv6_networks');
            echo 'N';
        }

        // Below looks like a duplicate of the above FIXME
        if (dbFetchCell('SELECT COUNT(*) FROM `ipv6_networks` WHERE `ipv6_network` = ?', array($ipv6_network)) < '1') {
            dbInsert(array('ipv6_network' => $ipv6_network), 'ipv6_networks');
            echo 'N';
        }

        $ipv6_network_id = dbFetchCell('SELECT `ipv6_network_id` FROM `ipv6_networks` WHERE `ipv6_network` = ?', array($ipv6_network));

        if (dbFetchCell('SELECT COUNT(*) FROM `ipv6_addresses` WHERE `ipv6_address` = ? AND `ipv6_prefixlen` = ? AND `port_id` = ?', array($ipv6_address, $ipv6_prefixlen, $port_id)) == '0') {
            dbInsert(array('ipv6_address' => $ipv6_address, 'ipv6_compressed' => $ipv6_compressed, 'ipv6_prefixlen' => $ipv6_prefixlen, 'ipv6_origin' => $ipv6_origin, 'ipv6_network_id' => $ipv6_network_id, 'port_id' => $port_id), 'ipv6_addresses');
            echo '+';
        }
        else {
            echo '.';
        }

        $full_address                  = "$ipv6_address/$ipv6_prefixlen";
        $valid_address                 = $full_address.'-'.$port_id;
        $valid['ipv6'][$valid_address] = 1;
    }//end if

}//end discover_process_ipv6()


// maintain a simple cache of seen IPs during ARP discovery


function arp_discovery_add_cache($ip) {
    global $arp_discovery;
    $arp_discovery[$ip] = true;

}//end arp_discovery_add_cache()


function arp_discovery_is_cached($ip) {
    global $arp_discovery;
    if (array_key_exists($ip, $arp_discovery)) {
        return $arp_discovery[$ip];
    }
    else {
        return false;
    }

}//end arp_discovery_is_cached()