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90 lines
2.7 KiB
PHP
90 lines
2.7 KiB
PHP
<?php
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/* Icinga Web 2 | (c) 2013-2015 Icinga Development Team | GPLv2+ */
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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 $protocol The transport protocol used by the service, defaults to 'tcp'
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*
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* @return array An array of all found service records
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*/
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public static function getSrvRecords($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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return $records === false ? array() : $records;
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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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