<?php
/**
 * Observium
 *
 *   This file is part of Observium.
 *
 * @package    observium
 * @subpackage discovery
 * @copyright  (C) 2006-2013 Adam Armstrong, (C) 2013-2020 Observium Limited
 *
 */

// mtxrNeighborIpAddress.1 = IpAddress: 192.168.4.27
// mtxrNeighborMacAddress.1 = STRING: 0:23:ac:53:3:28
// mtxrNeighborVersion.1 = STRING: Cisco IOS Software, C2960 Software (C2960-LANBASEK9-M), Version 15.0(1)SE2, RELEASE SOFTWARE (fc3)
// Technical Support: http://www.cisco.com/techsupport
// Copyright (c) 1986-2011 by Cisco Systems, Inc.
// Compiled Thu 22-Dec-11 00:46 by prod_rel_team
// mtxrNeighborPlatform.1 = STRING: cisco WS-C2960G-48TC-L
// mtxrNeighborIdentity.1 = STRING: switch.example.com
// mtxrNeighborSoftwareID.1 = STRING:
// mtxrNeighborInterfaceID.1 = INTEGER: 2

/*
MIKROTIK-MIB:
[1502] => array(
  [mtxrNeighborIpAddress]   => string(11) "10.24.99.65"
  [mtxrNeighborMacAddress]  => string(15) "0:4:56:ef:f1:c9"
  [mtxrNeighborVersion]     => string(5) "3.5.2"
  [mtxrNeighborPlatform]    => string(18) "5G Force 200 (ROW)"
  [mtxrNeighborIdentity]    => string(20) "Fortuna_Skladskaya28"
  [mtxrNeighborSoftwareID]  => string(10) "MAC-Telnet"
  [mtxrNeighborInterfaceID] => string(1) "9"
)

LLDP-MIB:
[1502] => array(
  [lldpRemChassisIdSubtype] => string(10) "macAddress"
  [lldpRemChassisId]        => string(17) "00:04:56:EF:F1:C9"
  [lldpRemPortIdSubtype]    => string(13) "interfaceName"
  [lldpRemPortId]           => string(9) "br-lan.98"
  [lldpRemSysName]          => string(20) "Fortuna_Skladskaya28"
  [lldpRemManAddr]          => string(11) "10.24.99.65"
  [lldpRemSysDesc]          => string(0) ""
)
 */
$mtxr_array = snmpwalk_cache_oid($device, "mtxrNeighbor", array(), "MIKROTIK-MIB", NULL, OBS_SNMP_ALL | OBS_SNMP_CONCAT);

if ($mtxr_array)
{
  print_debug_vars($mtxr_array);

  // Extend remote port names by discovery in LLDP-MIB (but do not use this MIB self, mikrotik not reports local port there)
  $lldp_array = snmpwalk_cache_oid($device, 'lldpRemChassisId', [], "LLDP-MIB");
  if (snmp_status())
  {
    $lldp_array = snmpwalk_cache_oid($device, 'lldpRemPortIdSubtype', $lldp_array, "LLDP-MIB");
    $lldp_array = snmpwalk_cache_oid($device, 'lldpRemPortId', $lldp_array, "LLDP-MIB");
    $lldp_array = snmpwalk_cache_oid($device, 'lldpRemSysDesc', $lldp_array, "LLDP-MIB", NULL, OBS_SNMP_ALL_MULTILINE);
    print_debug_vars($lldp_array);
  }

  foreach ($mtxr_array as $key => $entry)
  {
    if (isset($lldp_array[$key]))
    {
      // older fw versions
      $entry = array_merge($entry, $lldp_array[$key]);
    }
    elseif (isset($lldp_array['0.0.'.$key]))
    {
      // latest fw versions
      $entry = array_merge($entry, $lldp_array['0.0.'.$key]);
    }

    // Need to straighten out the MAC first for use later. Mikrotik does not pad the numbers! (i.e. 0:12:23:3:5c:6b)
    //$remote_mac = mac_zeropad($entry['mtxrNeighborMacAddress']);
    $entry['mtxrNeighborMacAddress'] = format_mac($entry['mtxrNeighborMacAddress']);

    // Note, mtxrNeighborInterfaceID really hex number, ie:
    // mtxrNeighborInterfaceID.1 = a
    $ifIndex = hexdec($entry['mtxrNeighborInterfaceID']);
    $remote_platform = strlen($entry['mtxrNeighborPlatform']) ? $entry['mtxrNeighborPlatform'] : $entry['lldpRemSysDesc'];
    $remote_port     = strlen($entry['lldpRemPortId']) ? $entry['lldpRemPortId'] : format_mac($entry['mtxrNeighborMacAddress'], ' ');

    // Get the port using BRIDGE-MIB (Why without Vlan?)
    //$port = dbFetchRow("SELECT * FROM `ports` WHERE `device_id` = ? AND `ifIndex` = ? AND `ifDescr` NOT LIKE 'Vlan%'", array($device['device_id'], $ifIndex));
    $port = get_port_by_index_cache($device, $ifIndex);

    $remote_device_id = NULL;
    $remote_port_id   = NULL;

    // Try find remote device and check if already cached
    $remote_device_id = get_autodiscovery_device_id($device, $entry['mtxrNeighborIdentity'], $entry['mtxrNeighborIpAddress'], $entry['mtxrNeighborMacAddress']);
    if (is_null($remote_device_id) &&                                                         // NULL - never cached in other rounds
        check_autodiscovery($entry['mtxrNeighborIdentity'], $entry['mtxrNeighborIpAddress'])) // Check all previous autodiscovery rounds
    {
      // Neighbour never checked, try autodiscovery
      $remote_device_id = autodiscovery_device($entry['mtxrNeighborIdentity'], $entry['mtxrNeighborIpAddress'], 'MNDP', $remote_platform, $device, $port);
    }

    if ($remote_device_id)
    {
      // Detect remote port by LLDP
      if (strlen($entry['lldpRemPortId']))
      {
        $id = $entry['lldpRemPortId'];
        switch ($entry['lldpRemPortIdSubtype'])
        {
          case 'interfaceAlias':
            $remote_port_id = dbFetchCell("SELECT `port_id` FROM `ports` WHERE `ifAlias` = ? AND `device_id` = ?", [ $id, $remote_device_id ]);
            break;
          case 'interfaceName':
            // Try lldpRemPortId
            $query          = 'SELECT `port_id` FROM `ports` WHERE (`ifName` = ? OR `ifDescr` = ? OR `port_label_short` = ?) AND `device_id` = ?';
            $remote_port_id = dbFetchCell($query, [ $id, $id, $id, $remote_device_id ]);
            break;
          case 'macAddress':
            $remote_port_id = get_port_id_by_mac($remote_device_id, $id);
            break;
          case 'networkAddress':
            $ip_version = get_ip_version($id);
            if ($ip_version)
            {
              $ip             = ip_uncompress($id);
              $remote_port_id = dbFetchCell("SELECT `port_id` FROM `ipv" . $ip_version . "_addresses` LEFT JOIN `ports` USING (`port_id`) WHERE `ipv" . $ip_version . "_address` = ? AND `device_id` = ?",
                                            [ $ip, $remote_device_id ]);
            }
            break;
          case 'local':
            // local not always ifIndex or FIXME (see: http://jira.observium.org/browse/OBSERVIUM-1716)
            if (!ctype_digit($id))
            {
              // Not sure what should be if $id ifName and it just numeric
              $query          = 'SELECT `port_id` FROM `ports` WHERE (`ifName` = ? OR `ifDescr` = ? OR `port_label_short` = ?) AND `device_id` = ?';
              $remote_port_id = dbFetchCell($query, [ $id, $id, $id, $remote_device_id ]);
            }
            break;
        }
      } else {
        // No way to find a remote port other than by MAC address, with the data we're getting from Mikrotik. Only proceed when only one remote port matches...
        $remote_port_id = get_port_id_by_mac($remote_device_id, $entry['mtxrNeighborMacAddress']);
      }
    }

    $neighbour = [
      'remote_port_id'  => $remote_port_id,
      'remote_hostname' => $entry['mtxrNeighborIdentity'],
      'remote_port'     => $remote_port,
      'remote_platform' => $remote_platform,
      'remote_version'  => $entry['mtxrNeighborVersion'],
      'remote_address'  => $entry['mtxrNeighborIpAddress']
    ];
    discover_neighbour($port, 'mndp', $neighbour);

  }
}

// EOF