<?php
/*
 * LibreNMS module to capture Cisco Class-Based QoS Details
 *
 * Copyright (c) 2015 Aaron Daniels <aaron@daniels.id.au>
 *
 * 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.  Please see LICENSE.txt at the top level of
 * the source code distribution for details.
 */

if ($device['os_group'] == "cisco") {

    // Define some error messages
    $error_vpn = array();
    $error_vpn[0] = "Other";
    $error_vpn[1] = "Configuration changed";
    $error_vpn[2] = "Control Group information is unavailable";
    $error_vpn[3] = "Data Group range information is unavailable";
    $error_vpn[4] = "Join or Source interface information is unavailable";
    $error_vpn[5] = "VPN name is unavailable";
    $error_vpn[6] = "IP address is missing for Join Interface";
    $error_vpn[7] = "Join Interface is down";
    $error_vpn[8] = "Overlay is administratively shutdown";
    $error_vpn[9] = "Overlay is in delete hold down phase";
    $error_vpn[10] = "VPN is reinitializing";
    $error_vpn[11] = "Site ID information is unavailable";
    $error_vpn[12] = "Site ID mismatch has occurred";
    $error_vpn[13] = "IP address is missing for Source Interface";
    $error_vpn[14] = "Source interface is down";
    $error_vpn[15] = "Changing site identifier";
    $error_vpn[16] = "Changing control group";
    $error_vpn[17] = "Device ID information is unavailable";
    $error_vpn[18] = "Changing device ID";
    $error_vpn[19] = "Cleanup in progress";

    $error_aed = array();
    $error_aed[0] = "Other";
    $error_aed[1] = "Overlay is Down";
    $error_aed[2] = "Site ID is not configured";
    $error_aed[3] = "Site ID mismatch";
    $error_aed[4] = "Version mismatch";
    $error_aed[5] = "Site VLAN is Down";
    $error_aed[6] = "No extended VLAN is operationally up";
    $error_aed[7] = "No Overlay Adjacency is up";
    $error_aed[8] = "LSPDB sync incomplete";
    $error_aed[9] = "Overlay state down event in progress";
    $error_aed[10] = "ISIS control group sync pending";

    $error_overlay = array();
    $error_overlay[1] = "active";
    $error_overlay[2] = "notInService";
    $error_overlay[3] = "notReady";
    $error_overlay[4] = "createAndGo";
    $error_overlay[5] = "createAndWait";
    $error_overlay[6] = "destroy";

    $module = 'Cisco-OTV';

    require_once 'includes/component.php';
    $component = new component();
    $options['filter']['type'] = array('=',$module);
    $options['filter']['disabled'] = array('=',0);
    $components = $component->getComponents($device['device_id'],$options);

    // We only care about our device id.
    $components = $components[$device['device_id']];

    // Only collect SNMP data if we have enabled components
    if (count($components > 0)) {
        // Let's gather the stats..
        $tblOverlayEntry = snmpwalk_array_num($device, '.1.3.6.1.4.1.9.9.810.1.2.1.1');
        $tblAdjacencyDatabaseEntry = snmpwalk_array_num($device, '.1.3.6.1.4.1.9.9.810.1.3.1.1', 0);
        $tblRouteNextHopAddr = snmpwalk_array_num($device, '.1.3.6.1.4.1.9.9.810.1.5.1.1.8', 0);
        $tblVlanEdgeDevIsAed = snmpwalk_array_num($device, '.1.3.6.1.4.1.9.9.810.1.2.2.1.6', 2);

        // Let's create an array of each remote OTV endpoint and the count of MAC addresses that are reachable via.
        $count_mac = array();
        foreach ($tblRouteNextHopAddr as $k => $v) {
            $count_mac[$v]++;
        }
        // Let's log some debugging
        d_echo("\n\nMAC Addresses: ".print_r($count_mac,TRUE));

        // Loop through the components and extract the data.
        foreach ($components as $key => &$array) {

            if ($array['otvtype'] == 'overlay') {
                // Let's check the various status' of the overlay
                $message = false;
                $vpn_state = $tblOverlayEntry['1.3.6.1.4.1.9.9.810.1.2.1.1.3'][$array['index']];
                if ($vpn_state != 2) {
                    $message .= "VPN Down: ".$error_vpn[$tblOverlayEntry['1.3.6.1.4.1.9.9.810.1.2.1.1.4'][$array['index']]];
                }
                $aed_state = $tblOverlayEntry['1.3.6.1.4.1.9.9.810.1.2.1.1.13'][$array['index']];
                if ($aed_state == 2) {
                    $message .= "AED Down: ".$error_aed[$tblOverlayEntry['1.3.6.1.4.1.9.9.810.1.2.1.1.14'][$array['index']]];
                }
                $overlay_state = $tblOverlayEntry['1.3.6.1.4.1.9.9.810.1.2.1.1.23'][$array['index']];
                if ($overlay_state == 2) {
                    $message .= "Overlay Down: ".$error_overlay[$tblOverlayEntry['1.3.6.1.4.1.9.9.810.1.2.1.1.24'][$array['index']]];
                }

                // If we have set a message, we have an error, activate alert.
                if ($message !== false) {
                    $array['error'] = $message;
                    $array['status'] = 0;
                }
                else {
                    $array['error'] = "";
                    $array['status'] = 1;
                }

                // Time to graph the count of the active VLAN's on this overlay.
                $count_vlan = 0;
                foreach ($tblVlanEdgeDevIsAed['1.3.6.1.4.1.9.9.810.1.2.2.1.6'][$array['index']] as $v) {
                    if ($v == 1) {
                        $count_vlan++;
                    }
                }

                // Let's log some debugging
                d_echo("\n\nOverlay Component: ".$key."\n");
                d_echo("    Label: ".$array['label']."\n");
                d_echo("    Index: ".$array['index']."\n");
                d_echo("    Status: ".$array['status']."\n");
                d_echo("    Message: ".$array['error']."\n");
                d_echo("    VLAN Count: ".$count_vlan."\n");

                $filename = "cisco-otv-".$array['label']."-vlan.rrd";
                $rrd_filename = $config['rrd_dir'] . "/" . $device['hostname'] . "/" . safename ($filename);

                if (!file_exists ($rrd_filename)) {
                    rrdtool_create ($rrd_filename, " DS:count:GAUGE:600:0:U" . $config['rrd_rra']);
                }
                $rrd['count'] = $count_vlan;

                // Update RRD
                rrdtool_update ($rrd_filename, $rrd);

            }
            elseif ($array['otvtype'] == 'adjacency') {
                $array['uptime'] = $tblAdjacencyDatabaseEntry['1.3.6.1.4.1.9.9.810.1.3.1.1.6.'.$array['index'].'.1.4.'.$array['endpoint']];
                $message = false;
                if ($tblAdjacencyDatabaseEntry['1.3.6.1.4.1.9.9.810.1.3.1.1.5.'.$array['index'].'.1.4.'.$array['endpoint']] != 1) {
                    $message .= "Adjacency is Down\n";
                }
                if ($tblAdjacencyDatabaseEntry['1.3.6.1.4.1.9.9.810.1.3.1.1.6.'.$array['index'].'.1.4.'.$array['endpoint']] < $array['uptime']) {
                    $message .= "Adjacency has been reset\n";
                }

                // If we have set a message, we have an error, activate alert.
                if ($message !== false) {
                    $array['error'] = $message;
                    $array['status'] = 0;
                }
                else {
                    $array['error'] = "";
                    $array['status'] = 1;
                }

                // Let's log some debugging
                d_echo("\n\nAdjacency Component: ".$key."\n");
                d_echo("    Label: ".$array['label']."\n");
                d_echo("    Index: ".$array['index']."\n");
                d_echo("    Status: ".$array['status']."\n");
                d_echo("    Message: ".$array['error']."\n");
            }
            elseif ($array['otvtype'] == 'endpoint') {
                if (isset($count_mac[$array['endpoint']])) {
                    $rrd['count'] = $count_mac[$array['endpoint']];
                }
                else {
                    $rrd['count'] = "0";
                }

                // Let's log some debugging
                d_echo("\n\nEndpoint Component: ".$key."\n");
                d_echo("    Label: ".$array['label']."\n");
                d_echo("    MAC Count: ".$rrd['count']."\n");

                $filename = "cisco-otv-".$array['endpoint']."-mac.rrd";
                $rrd_filename = $config['rrd_dir'] . "/" . $device['hostname'] . "/" . safename ($filename);

                if (!file_exists ($rrd_filename)) {
                    rrdtool_create ($rrd_filename, " DS:count:GAUGE:600:0:U" . $config['rrd_rra']);
                }

                // Update RRD
                rrdtool_update ($rrd_filename, $rrd);

            } // End If

        } // End foreach components

        // Write the Components back to the DB.
        $component->setComponentPrefs($device['device_id'],$components);

        echo $module." ";
    } // end if count components

    // Clean-up after yourself!
    unset($components, $component, $module);
}