126 lines
4.0 KiB
PHP
126 lines
4.0 KiB
PHP
<?php
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// {{{ICINGA_LICENSE_HEADER}}}
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/**
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* This file is part of Icinga Web 2.
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*
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* Icinga Web 2 - Head for multiple monitoring backends.
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* Copyright (C) 2013 Icinga Development Team
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (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, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* @copyright 2013 Icinga Development Team <info@icinga.org>
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* @license http://www.gnu.org/licenses/gpl-2.0.txt GPL, version 2
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* @author Icinga Development Team <info@icinga.org>
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*
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*/
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// {{{ICINGA_LICENSE_HEADER}}}
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namespace Icinga\Protocol;
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/**
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* Discover dns records using regular or reverse lookup
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*/
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class Dns
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{
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/**
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* Discover all service records on a given domain
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*
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* @param string $domain The domain to search
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* @param string $service The type of the service, like for example 'ldaps' or 'ldap'
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* @param string $protocol The transport protocol used by the service, defaults to 'tcp'
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*
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* @return array|null An array of all service domains
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*/
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public static function getSrvRecords($domain, $service, $protocol = 'tcp')
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{
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$records = dns_get_record('_' . $service . '._' . $protocol . '.' . $domain, DNS_SRV);
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if ($records === false) {
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return null;
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}
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$targets = array();
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foreach ($records as $record) {
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if (array_key_exists('target', $record)) {
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$targets[] = $record['target'];
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}
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}
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return $targets;
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}
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/**
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* Get all ldap records for the given domain
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*
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* @param string $query The domain to query
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* @param int $type The type of DNS-entry to fetch, see
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* http://www.php.net/manual/de/function.dns-get-record.php for available types
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*
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* @return array|null An array of record entries
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*/
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public static function records($query, $type = DNS_ANY)
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{
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return dns_get_record($query, $type);
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}
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/**
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* Reverse lookup all host names available on the given ip address
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*
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* @param string $ipAddress
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* @param int $type
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*
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* @return array|null
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*/
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public static function ptr($ipAddress, $type = DNS_ANY)
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{
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$host = gethostbyaddr($ipAddress);
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if ($host === false || $host === $ipAddress) {
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// malformed input or no host found
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return null;
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}
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return self::records($host, $type);
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}
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/**
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* Get the IPv4 address of the given hostname.
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*
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* @param $hostname The hostname to resolve
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*
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* @return string|null The IPv4 address of the given hostname or null, when no entry exists.
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*/
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public static function ipv4($hostname)
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{
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$records = dns_get_record($hostname, DNS_A);
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if ($records !== false && count($records) > 0) {
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return $records[0]['ip'];
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}
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return null;
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}
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/**
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* Get the IPv6 address of the given hostname.
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*
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* @param $hostname The hostname to resolve
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*
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* @return string|null The IPv6 address of the given hostname or null, when no entry exists.
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*/
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public static function ipv6($hostname)
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{
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$records = dns_get_record($hostname, DNS_AAAA);
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if ($records !== false && count($records) > 0) {
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return $records[0]['ip'];
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}
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return null;
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}
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}
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