<?php
/**
 * Observium
 *
 *   This file is part of Observium.
 *
 * @package        observium
 * @subpackage     discovery
 * @copyright  (C) Adam Armstrong
 *
 */

// CISCO-STACKWISE-MIB::cswSwitchNumCurrent.1001 = Gauge32: 1
// CISCO-STACKWISE-MIB::cswSwitchNumNextReload.1001 = Gauge32: 1
// CISCO-STACKWISE-MIB::cswSwitchRole.1001 = INTEGER: master(1)
// CISCO-STACKWISE-MIB::cswSwitchSwPriority.1001 = Gauge32: 1
// CISCO-STACKWISE-MIB::cswSwitchHwPriority.1001 = Gauge32: 5
// CISCO-STACKWISE-MIB::cswSwitchState.1001 = INTEGER: ready(4)
// CISCO-STACKWISE-MIB::cswSwitchMacAddress.1001 = STRING: 3c:5e:c3:cb:d3:0
// CISCO-STACKWISE-MIB::cswSwitchSoftwareImage.1001 = STRING: C2960X-UNIVERSALK9-M
// CISCO-STACKWISE-MIB::cswSwitchPowerBudget.1001 = Gauge32: 0 Watts
// CISCO-STACKWISE-MIB::cswSwitchPowerCommited.1001 = Gauge32: 0 Watts
// CISCO-STACKWISE-MIB::cswSwitchSystemPowerPriority.1001 = Gauge32: 0
// CISCO-STACKWISE-MIB::cswSwitchPoeDevicesLowPriority.1001 = Gauge32: 0
// CISCO-STACKWISE-MIB::cswSwitchPoeDevicesHighPriority.1001 = Gauge32: 0
// CISCO-STACKWISE-MIB::cswStackPortOperStatus.5180 = INTEGER: down(2)
// CISCO-STACKWISE-MIB::cswStackPortOperStatus.5181 = INTEGER: down(2)
// CISCO-STACKWISE-MIB::cswStackPortNeighbor.5180 = INTEGER: 0
// CISCO-STACKWISE-MIB::cswStackPortNeighbor.5181 = INTEGER: 0
$device_tmp = $device;
// Disable snmp bulk and retries, because some 2960S freeze on this walks
$device_tmp['snmp_retries'] = 1;
$device_tmp['snmp_nobulk']  = TRUE;
$stackredundant             = snmp_get_oid($device_tmp, 'cswRingRedundant.0', 'CISCO-STACKWISE-MIB');
if (snmp_status()) {
    $stackstatus   = snmpwalk_cache_oid($device_tmp, 'cswSwitchInfoEntry', [], 'CISCO-STACKWISE-MIB');
    $stackportoper = snmpwalk_cache_oid($device_tmp, 'cswStackPortOperStatus', [], 'CISCO-STACKWISE-MIB');

    $ports_down = 0;
    foreach ($stackportoper as $entry) {
        // Count down ports for check if stack exist
        if ($entry['cswStackPortOperStatus'] === 'down') {
            $ports_down++;
        }
    }

    $stack_count = count($stackstatus); // Count stack members
    foreach ($stackstatus as $index => $entry) {
        $roleoid    = '.1.3.6.1.4.1.9.9.500.1.2.1.1.3.' . $index;
        $roledescr  = 'Switch ' . $entry['cswSwitchNumCurrent'] . ' stacking role';
        $stateoid   = '.1.3.6.1.4.1.9.9.500.1.2.1.1.6.' . $index;
        $statedescr = 'Switch ' . $entry['cswSwitchNumCurrent'] . ' stacking state';

        if ($stack_count === 1 && $entry['cswSwitchNumCurrent'] == 1 && $stackredundant === 'false' &&
            $ports_down === 2 && $entry['cswSwitchRole'] === 'master' && $entry['cswSwitchState'] === 'ready') {
            // Heh, on IOS 15.x stacking is always enabled and does not have any way to detect if stack module exists and stacking is configured
            $stack_count = 0;
            print_debug("Stacking exists, but not configured and not active.");
            break; // exit foreach
        }

        if (!empty($entry['cswSwitchRole'])) {
            discover_status_ng($device, $mib, 'cswSwitchRole', $roleoid, $index, 'cisco-stackwise-member-state', $roledescr, $entry['cswSwitchRole'], ['entPhysicalClass' => 'stack', 'entPhysicalIndex' => $index]);
            discover_status_ng($device, $mib, 'cswSwitchState', $stateoid, $index, 'cisco-stackwise-switch-state', $statedescr, $entry['cswSwitchState'], ['entPhysicalClass' => 'stack', 'entPhysicalIndex' => $index]);
        }
    }

    if ($stack_count) {
        $oid   = '.1.3.6.1.4.1.9.9.500.1.1.3.0';
        $descr = 'Stackports in redundant ring';
        discover_status_ng($device, $mib, 'cswRingRedundant', $oid, '0', 'cisco-stackwise-redundant-state', $descr, $stackredundant, ['entPhysicalClass' => 'stack']);

        foreach ($stackportoper as $index => $entry) {
            $oid   = '.1.3.6.1.4.1.9.9.500.1.2.2.1.1.' . $index;
            $port  = get_port_by_index_cache($device, $index);
            $descr = 'Stackport ' . $port['port_label'];

            if (!empty($entry['cswStackPortOperStatus'])) {
                $options = ['entPhysicalClass' => 'port', 'entPhysicalIndex' => $index, 'measured_class' => 'port', 'measured_entity' => $port['port_id']];
                discover_status_ng($device, $mib, 'cswStackPortOperStatus', $oid, $index, 'cisco-stackwise-port-oper-state', $descr, $entry['cswStackPortOperStatus'], $options);
            }
        }
    } else {
        echo "No stacking detected.";
    }
}

unset($device_tmp);

// EOF