mirror of
https://github.com/librenms/librenms.git
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107 lines
4.3 KiB
PHP
107 lines
4.3 KiB
PHP
<?php
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/**
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* arp-table.php
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*
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* Collect arp table entries from devices and update the database
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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* @package LibreNMS
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* @link http://librenms.org
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* @copyright 2016 Tony Murray
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* @author Tony Murray <murraytony@gmail.com>
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*/
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if (key_exists('vrf_lite_cisco', $device) && (count($device['vrf_lite_cisco'])!=0)) {
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$vrfs_lite_cisco = $device['vrf_lite_cisco'];
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} else {
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$vrfs_lite_cisco = array(array('context_name'=>null));
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}
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foreach ($vrfs_lite_cisco as $vrf) {
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$context = $vrf['context_name'];
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$device['context_name']=$context;
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$arp_data = snmpwalk_cache_multi_oid($device, 'ipNetToPhysicalPhysAddress', array(), 'IP-MIB');
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$arp_data = snmpwalk_cache_multi_oid($device, 'ipNetToMediaPhysAddress', $arp_data, 'IP-MIB');
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$sql = "SELECT M.* from ipv4_mac AS M, ports AS I WHERE M.port_id=I.port_id AND I.device_id=? AND M.context_name=?";
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$params = array($device['device_id'], $context);
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$existing_data = dbFetchRows($sql, $params);
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$ipv4_addresses = array();
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foreach ($existing_data as $data) {
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$ipv4_addresses[] = $data['ipv4_address'];
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}
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$arp_table = array();
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$insert_data = array();
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foreach ($arp_data as $ip => $data) {
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if (isset($data['ipNetToPhysicalPhysAddress'])) {
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$raw_mac = $data['ipNetToPhysicalPhysAddress'];
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list($if, $ipv, $ip) = explode('.', $ip, 3);
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} elseif (isset($data['ipNetToMediaPhysAddress'])) {
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$raw_mac = $data['ipNetToMediaPhysAddress'];
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list($if, $ip) = explode('.', $ip, 2);
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$ipv = 'ipv4';
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}
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$interface = get_port_by_index_cache($device['device_id'], $if);
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$port_id = $interface['port_id'];
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if (!empty($ip) && $ipv === 'ipv4' && !empty($raw_mac) && $raw_mac != '0:0:0:0:0:0' && !isset($arp_table[$port_id][$ip])) {
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$mac = implode(array_map('zeropad', explode(':', $raw_mac)));
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$arp_table[$port_id][$ip] = $mac;
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$index = array_search($ip, $ipv4_addresses);
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if ($index !== false) {
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$old_mac = $existing_data[$index]['mac_address'];
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if ($mac != $old_mac && $mac != '') {
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d_echo("Changed mac address for $ip from $old_mac to $mac\n");
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log_event("MAC change: $ip : ".mac_clean_to_readable($old_mac).' -> '.mac_clean_to_readable($mac), $device, 'interface', $port_id);
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dbUpdate(array('mac_address' => $mac), 'ipv4_mac', 'port_id=? AND ipv4_address=? AND context_name=?', array($port_id, $ip, $context));
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}
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d_echo(null, '.');
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} elseif (isset($interface['port_id'])) {
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d_echo(null, '+');
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$insert_data[] = array(
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'port_id' => $port_id,
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'mac_address' => $mac,
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'ipv4_address' => $ip,
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'context_name' => $context,
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);
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}
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}
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}
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// add new entries
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if (!empty($insert_data)) {
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dbBulkInsert($insert_data, 'ipv4_mac');
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}
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// remove stale entries
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foreach ($existing_data as $entry) {
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$entry_mac = $entry['mac_address'];
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$entry_if = $entry['port_id'];
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$entry_ip = $entry['ipv4_address'];
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if ($arp_table[$entry_if][$entry_ip] != $entry_mac) {
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dbDelete('ipv4_mac', '`port_id` = ? AND `mac_address`=? AND `ipv4_address`=? AND `context_name`=?', array($entry_if, $entry_mac, $entry_ip, $context));
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d_echo(null, '-');
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}
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}
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echo PHP_EOL;
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unset($existing_data, $arp_table, $insert_data, $sql, $params, $context);
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unset($device['context_name']);
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}
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unset($vrfs_lite_cisco);
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