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85 lines
2.3 KiB
PHP
85 lines
2.3 KiB
PHP
<?php
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//
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// Observium module to do device discovery by ARP table contents.
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//
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// Needs to be run after the ARP table discovery, because it uses the
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// data gathered by the ARP table discovery module. Keeps a cache of
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// seen hosts, and will not attempt re-discovery of the same IP (whether
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// discovery failed or succeed) during the same discovery run.
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//
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// Copyright (c) 2012-2013 Gear Consulting Pty Ltd <http://libertysys.com.au/>
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//
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// Author: Paul Gear <librenms@libertysys.com.au>
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// License: GPLv3
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//
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echo 'ARP Discovery: ';
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$hostname = $device['hostname'];
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$deviceid = $device['device_id'];
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// Find all IPv4 addresses in the MAC table that haven't been discovered on monitored devices.
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$sql = '
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SELECT *
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FROM ipv4_mac as m, ports as i
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WHERE m.port_id = i.port_id
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AND i.device_id = ?
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AND i.deleted = 0
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AND NOT EXISTS (
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SELECT * FROM ipv4_addresses a
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WHERE a.ipv4_address = m.ipv4_address
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)
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GROUP BY ipv4_address
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ORDER BY ipv4_address
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';
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// FIXME: Observium now uses ip_mac.ip_address in place of ipv4_mac.ipv4_address - why?
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$names = array();
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$ips = array();
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foreach (dbFetchRows($sql, array($deviceid)) as $entry) {
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global $config;
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$ip = $entry['ipv4_address'];
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$mac = $entry['mac_address'];
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$if = $entry['port_id'];
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$int = ifLabel($if);
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$label = $int['label'];
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// Even though match_network is done inside discover_new_device, we do it here
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// as well in order to skip unnecessary reverse DNS lookups on discovered IPs.
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if (match_network($config['autodiscovery']['nets-exclude'], $ip)) {
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echo 'x';
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continue;
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}
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if (!match_network($config['nets'], $ip)) {
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echo 'i';
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log_event("Ignored $ip", $deviceid, 'interface', $if);
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continue;
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}
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// Attempt discovery of each IP only once per run.
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if (object_is_cached('arp_discovery', $ip)) {
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echo '.';
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continue;
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}
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object_add_cache('arp_discovery', $ip);
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$name = gethostbyaddr($ip);
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echo '+';
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$names[] = $name;
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$ips[$name] = $ip;
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}
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echo "\n";
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// Run device discovery on each of the devices we've detected so far.
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foreach ($names as $name) {
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$remote_device_id = discover_new_device($name, $device, 'ARP');
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}
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unset($names);
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unset($ips);
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