<?php
/**
 * Ios.php - cpcat
 *
 * Cisco IOS
 *
 * 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 <http>.
 *
 * @package    LibreNMS
 * @link       http://librenms.org
 * @copyright  2017 Tony Murray
 * @author     Tony Murray <murraytony>
 */

namespace LibreNMS\OS;

use LibreNMS\Device\WirelessSensor;
use LibreNMS\Interfaces\Discovery\Sensors\WirelessClientsDiscovery;
use LibreNMS\Interfaces\Discovery\Sensors\WirelessRssiDiscovery;
use LibreNMS\OS\Shared\Cisco;

class Ios extends Cisco implements
    WirelessClientsDiscovery,
    WirelessRssiDiscovery
{
//    use CiscoCellular;

    /**
     * @return array Sensors
     */
    public function discoverWirelessClients()
    {
        $device = $this->getDevice();

        if (!starts_with($device['hardware'], 'AIR-') && !str_contains($device['hardware'], 'ciscoAIR')) {
            // unsupported IOS hardware
            return array();
        }

        $data = snmpwalk_cache_oid($device, 'cDot11ActiveBridges', array(), 'CISCO-DOT11-ASSOCIATION-MIB');
        $entPhys = snmpwalk_cache_oid($device, 'entPhysicalDescr', array(), 'ENTITY-MIB');

        // fixup incorrect/missing entPhysicalIndex mapping
        foreach ($data as $index => $_unused) {
            foreach ($entPhys as $entIndex => $ent) {
                $descr = $ent['entPhysicalDescr'];
                unset($entPhys[$entIndex]); // only use each one once

                if (ends_with($descr, 'Radio')) {
                    d_echo("Mapping entPhysicalIndex $entIndex to ifIndex $index\n");
                    $data[$index]['entPhysicalIndex'] = $entIndex;
                    $data[$index]['entPhysicalDescr'] = $descr;
                    break;
                }
            }
        }

        $sensors = array();
        foreach ($data as $index => $entry) {
            $sensors[] = new WirelessSensor(
                'clients',
                $device['device_id'],
                ".1.3.6.1.4.1.9.9.273.1.1.2.1.2.$index",
                'ios',
                $index,
                $entry['entPhysicalDescr'],
                $entry['cDot11ActiveBridges'],
                1,
                1,
                'sum',
                null,
                null,
                0,
                null,
                null,
                $entry['entPhysicalIndex'],
                'ports'
            );
        }
        return $sensors;
    }


    public function discoverWirelessRssi()
    {
        function gen_descr ($index) {
//            $descr = "RSSI: ";
            $raw = explode(".", str_replace ("1.3.6.1.4.1.9.9.273.1.3.1.1.3.", "", $index));
            for ($i=0; $i &lt; $raw[1]; $i++) { // bridge name
                $descr = $descr . chr($raw[$i+2]);
                }
            $descr = $descr . " ";
            for ($i=6; $i > 0; $i--) { // MAC address of client
                $descr = $descr . ($raw[count($raw)-$i] > 15 ? "" : "0") . dechex($raw[count($raw)-$i]);
                }
            return $descr;
            }

        $device = $this->getDevice();

        if (!starts_with($device['hardware'], 'AIR-') && !str_contains($device['hardware'], 'ciscoAIR')) {
            // unsupported IOS hardware
            return array();
        }

        $sensors = array();
        $data = snmpwalk_cache_multi_oid($this->getDevice(), 'cDot11ClientSignalStrength', array(), 'CISCO-DOT11-ASSOCIATION-MIB', null, '-OQUn');

        foreach ($data as $index => $entry) {
            $sensors[] = new WirelessSensor(
                'rssi', // $type
                $device['device_id'], // $device_id
                $index, // $oids
                'ios', // $subtype
                $index, // $index
                gen_descr($index), // $description
                $entry['.1.3.6.1.4.1.9.9.273.1.3.1.1.3.1.1'], // $current
                1, // $multiplier
                1, // $divisor
                'avg', // $aggregator
                null, // $access_point_id
                -10, // $low_limit
                -80, // $high_warn
                -20, // $high_warn
                -70, // $low_warn
            );
        }

        return $sensors;
    }

}