<?php
/**
 * Observium
 *
 *   This file is part of Observium.
 *
 * @package    observium
 * @subpackage poller
 * @copyright  (C) 2006-2013 Adam Armstrong, (C) 2013-2022 Observium Limited
 *
 */

/**
 * @var array $device
 * @var string $mib
 * @var array $def
 * @var array $entry
 * @var string $bgpLocalAs
 * @var array $peers_data from BGP4-MIB
 * @var array $p_list
 * @var array $peerlist
 * @var bool $check_vrfs
 * @var string $vrf_name
 */

// Common vendor specific
$vendor_mib = $mib;

$vendor_bgp = snmpwalk_cache_oid($device, $def['oids']['PeerRemoteAs']['oid'], [], $vendor_mib, NULL, OBS_SNMP_ALL_NUMERIC_INDEX);
if (safe_empty($vendor_bgp)) {
  $vendor_mib = FALSE; // Unset vendor_mib since not found on device

  return;
}

$v_oids = [
  'PeerState', 'PeerAdminStatus', 'PeerInUpdates', 'PeerOutUpdates',
  'PeerInTotalMessages', 'PeerOutTotalMessages',
  'PeerFsmEstablishedTime', 'PeerInUpdateElapsedTime'
];
foreach ($v_oids as $oid) {
  $vendor_oid = $def['oids'][$oid]['oid'];
  //print_vars($oid);
  if (!isset($def['index'][$vendor_oid]) && !safe_empty($vendor_oid)) {
    $vendor_bgp = snmpwalk_cache_oid($device, $vendor_oid, $vendor_bgp, $vendor_mib, NULL, OBS_SNMP_ALL_NUMERIC_INDEX);
  }
}
// Fetch vendor specific counters
$vendor_counters = [];
$v_oids = [ 'PeerAcceptedPrefixes', 'PeerDeniedPrefixes', 'PeerAdvertisedPrefixes' ];
foreach ($v_oids as $oid) {
  $vendor_oid = $def['oids'][$oid]['oid'];
  //print_vars($oid);
  if (!safe_empty($vendor_oid)) {
    $vendor_counters = snmpwalk_cache_oid($device, $vendor_oid, $vendor_counters, $vendor_mib, NULL, OBS_SNMP_ALL_NUMERIC_INDEX);
  }
}

unset($vendor_oid);

// Collect founded peers and rewrite to pretty array.
foreach ($vendor_bgp as $idx => $vendor_entry) {
  if (!safe_empty($def['index'])) {
    parse_bgp_peer_index($vendor_entry, $idx, $vendor_mib);
  }
  $peer_ip  = hex2ip($vendor_entry[$def['oids']['PeerRemoteAddr']['oid']]);

  //$vendor_entry[$vendor_PeerLocalAddr] = hex2ip($vendor_entry[$vendor_PeerLocalAddr]);
  $vendor_entry['idx'] = $idx;
  $peer_as  = $vendor_entry[$def['oids']['PeerRemoteAs']['oid']];
  $peer = [
    'ip'            => $peer_ip === '0.0.0.0' ? '' : $peer_ip,
    'as'            => $peer_as,
    'admin_status'  => $vendor_entry[$def['oids']['PeerAdminStatus']['oid']]
  ];
  if ($check_vrfs) {
    $peer['virtual_name'] = $vrf_name;
  }

  if (is_bgp_peer_valid($peer, $device)) {
    // Fix possible 32bit ASN for peers from BGP4-MIB
    // Brocade example:
    //                                     BGP4-MIB::bgpPeerRemoteAs.27.122.122.4 = 23456
    //  FOUNDRY-BGPV2-MIB::bgp4V2PeerRemoteAs.1.1.4.27.122.122.5.1.4.27.122.122.4 = 133189
    if (isset($p_list[$peer_ip]) && !isset($p_list[$peer_ip][$peer_as])) {
      unset($p_list[$peer_ip]); // Clean old peer list
      $bgp4_peer_as = $bgp_peers[$peer_ip]['bgpPeerRemoteAs'];  // BGP4-MIB
      if ($peer_as > $bgp4_peer_as) {
        $bgp_peers[$peer_ip]['bgpPeerRemoteAs'] = $peer_as;
      }
    }

    $p_list[$peer_ip][$peer_as] = 1;
    //$vendor_peers[$peer_ip][$peer_as] = $vendor_entry;

    // Unify peer
    $vendor_peers[$peer_ip][$peer_as] = [ 'idx' => $idx ];
    foreach ($bgp_oids as $bgp_oid) {
      $def_oid = str_replace('bgp', '', $bgp_oid); // bgpPeerState -> PeerState
      if (isset($def['oids'][$def_oid]['transform'])) {
        $vendor_peers[$peer_ip][$peer_as][$bgp_oid] = string_transform($vendor_entry[$def['oids'][$def_oid]['oid']], $def['oids'][$def_oid]['transform']);
      } else {
        $vendor_peers[$peer_ip][$peer_as][$bgp_oid] = $vendor_entry[$def['oids'][$def_oid]['oid']];
      }
    }
    if ($check_vrfs) {
      $vendor_peers[$peer_ip][$peer_as]['virtual_name'] = $vrf_name;
    }
  }
}

// EOF