mirror of
https://github.com/librenms/librenms.git
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90 lines
2.5 KiB
PHP
90 lines
2.5 KiB
PHP
<?php
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/**
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* Dns.php
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*
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* Get version info about LibreNMS and various components/dependencies
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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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* @link http://librenms.org
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*
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* @copyright 2021 Thomas Berberich
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* @author Thomas Berberch <sourcehhdoctor@gmail.com>
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*/
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namespace LibreNMS\Util;
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use App\Models\Device;
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use LibreNMS\Interfaces\Geocoder;
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class Dns implements Geocoder
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{
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protected $resolver;
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public function __construct()
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{
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$this->resolver = new \Net_DNS2_Resolver();
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// Workaround for strlen() null
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// https://github.com/mikepultz/netdns2/blob/master/Net/DNS2/Socket.php#L132
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$this->resolver->local_host = '0';
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}
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public static function lookupIp(Device $device): ?string
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{
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if (IP::isValid($device->hostname)) {
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return $device->hostname;
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}
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try {
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if ($device->transport == 'udp6' || $device->transport == 'tcp6') {
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return dns_get_record($device['hostname'], DNS_AAAA)[0]['ipv6'] ?? null;
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}
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return dns_get_record($device['hostname'], DNS_A)[0]['ip'] ?? null;
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} catch (\Exception $e) {
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return null;
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}
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}
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/**
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* @param string $domain Domain which has to be parsed
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* @param string $record DNS Record which should be searched
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* @return array List of matching records
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*/
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public function getRecord($domain, $record = 'A')
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{
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try {
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$ret = $this->resolver->query($domain, $record);
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return $ret->answer;
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} catch (\Net_DNS2_Exception $e) {
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d_echo('::query() failed: ' . $e->getMessage());
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return [];
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}
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}
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public function getCoordinates($hostname)
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{
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foreach ($this->getRecord($hostname, 'LOC') as $record) {
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return [
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'lat' => $record->latitude ?? null,
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'lng' => $record->longitude ?? null,
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];
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}
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return [];
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}
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}
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