<?php
/**
 * airos-af-ltu.inc.php
 *
 * LibreNMS eth0 port discovery module for Ubiquiti airFiber 5XHD
 *
 * 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.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 *
 * @link       https://www.librenms.org
 *
 * @copyright  2020 Denny Friebe
 * @author     Denny Friebe <denny.friebe@icera-network.de>
 */
$airos_eth_stat = snmpwalk_cache_oid($device, 'afLTUethConnected', [], 'UBNT-AFLTU-MIB', null, '-OteQUsb');

foreach ($port_stats as $index => $afport_stats) {
    if ($afport_stats['ifDescr'] == 'eth0') {
        if (isset($airos_eth_stat[0]['afLTUethConnected'])) {
            $port_stats[$index]['ifOperStatus'] = ($airos_eth_stat[0]['afLTUethConnected'] == 1 ? 'up' : 'down');
        } else {
            /**
             * Ubiquiti uses separate OIDs for ethernet status. Sometimes the devices have difficulties to return
             * a value for the OID "afLTUethConnected".
             * Because "IF-MIB" reads wrong information we remove the existing entry for "eth0" if "afLTUethConnected"
             * could not be read to prevent wrong information from being stored.
             */
            unset($port_stats[$index]);
        }
        break;
    }
}

unset($airos_eth_stat);
