<?php

/*
 * PHP.updateDNS (OPNsense version)
 *
 * +====================================================+
 *  Services Supported:
 *    - DynDns (dyndns.org) [dynamic, static, custom]
 *    - DHSDns (dhs.org)
 *    - No-IP (no-ip.com)
 *    - EasyDNS (easydns.com)
 *    - DHS (www.dhs.org)
 *    - HN (hn.org) -- incomplete checking!
 *    - DynS (dyns.org)
 *    - ZoneEdit (zoneedit.com)
 *    - FreeDNS (freedns.afraid.org)
 *    - Loopia (loopia.se)
 *    - StaticCling (staticcling.org)
 *    - DNSexit (dnsexit.com)
 *    - OpenDNS (opendns.com)
 *    - Namecheap (namecheap.com)
 *    - HE.net (dns.he.net)
 *    - HE.net IPv6 (dns.he.net)
 *    - HE.net Tunnelbroker IP update (ipv4.tunnelbroker.net)
 *    - SelfHost (selfhost.de)
 *    - Amazon Route 53 (aws.amazon.com)
 *    - DNS-O-Matic (dnsomatic.com)
 *    - Custom dynamic DNS (any URL)
 *    - Custom dynamic DNS IPv6 (any URL)
 *    - CloudFlare (www.cloudflare.com)
 *    - Eurodns (eurodns.com)
 *    - GratisDNS (gratisdns.dk)
 *    - City Network (citynetwork.se)
 *    - Duck DNS (duckdns.org)
 *    - Google Domains (domains.google.com)
 * +----------------------------------------------------+
 *  Requirements:
 *    - PHP version 4.0.2 or higher with the CURL Library and the PCRE Library
 * +----------------------------------------------------+
 *  Public Functions
 *    - updatedns()
 *
 *  Private Functions
 *    - _update()
 *    - _checkStatus()
 *    - _error()
 *    - _detectChange()
 *    - _debug()
 *    - _checkIP()
 * +----------------------------------------------------+
 *  DynDNS Dynamic - Last Tested: 12 July 2005
 *  DynDNS Static  - Last Tested: NEVER
 *  DynDNS Custom  - Last Tested: NEVER
 *  No-IP          - Last Tested: 20 July 2008
 *  HN.org         - Last Tested: 12 July 2005
 *  EasyDNS        - Last Tested: 20 July 2008
 *  DHS            - Last Tested: 12 July 2005
 *  ZoneEdit       - Last Tested: NEVER
 *  Dyns           - Last Tested: NEVER
 *  ODS            - Last Tested: 02 August 2005
 *  FreeDNS        - Last Tested: 23 Feb 2011
 *  Loopia         - Last Tested: NEVER
 *  StaticCling    - Last Tested: 27 April 2006
 *  DNSexit       - Last Tested: 20 July 2008
 *  OpenDNS       - Last Tested: 4 August 2008
 *  Namecheap       - Last Tested: 31 August 2010
 *  HE.net         - Last Tested: 7 July 2013
 *  HE.net IPv6    - Last Tested: 7 July 2013
 *  HE.net Tunnel  - Last Tested: 28 June 2011
 *  SelfHost       - Last Tested: 26 December 2011
 *  Amazon Route 53 - Last tested: 01 April 2012
 *  DNS-O-Matic       - Last Tested: 9 September 2010
 *  CloudFlare     - Last Tested: 30 May 2013
 *  Eurodns       - Last Tested: 27 June 2013
 *  GratisDNS      - Last Tested: 15 August 2012
 *  OVH DynHOST       - Last Tested: NEVER
 *  City Network   - Last Tested: 13 November 2013
 *  Duck DNS       - Last Tested: 04 March 2015
 *  Google Domains - Last Tested: 20 February 2017
 * +====================================================+
 *
 * @author    E.Kristensen
 * @link    http://www.idylldesigns.com/projects/phpdns/
 * @version    0.8
 * @updated    13 October 05 at 21:02:42 GMT
 *
 * DNSexit/OpenDNS support and multiwan extension for pfSense by Ermal Luci
 * Custom DNS support by Matt Corallo
 *
 */

class updatedns {
    var $_cacheFile;
    var $_cacheFile_v6;
    var $_debugFile;
    var $_UserAgent = 'User-Agent: phpDynDNS/0.7';
    var $_errorVerbosity = 0;
    var $_dnsService;
    var $_dnsUser;
    var $_dnsPass;
    var $_dnsHost;
    var $_dnsIP;
    var $_dnsWildcard;
    var $_dnsMX;
    var $_dnsBackMX;
    var $_dnsServer;
    var $_dnsPort;
    var $_dnsUpdateURL;
    var $_dnsZoneID;
    var $_dnsTTL;
    var $status;
    var $_debugID;
    var $_if;
    var $_dnsResultMatch;
    var $_dnsRequestIf;
    var $_dnsRequestIfIP;
    var $_dnsVerboseLog;
    var $_curlIpresolveV4;
    var $_curlSslVerifypeer;
    var $_dnsMaxCacheAgeDays;
    var $_dnsDummyUpdateDone;
    var $_forceUpdateNeeded;
    var $_useIPv6;

    /*
     * Public Constructor Function (added 12 July 05) [beta]
     *   - Gets the dice rolling for the update.
     *   - $dnsResultMatch should only be used with $dnsService = 'custom'
     *   -  $dnsResultMatch is parsed for '%IP%', which is the IP the provider was updated to,
     *   -  it is otherwise expected to be exactly identical to what is returned by the Provider.
     *   - $dnsUser, and $dnsPass indicate HTTP Auth for custom DNS, if they are needed in the URL (GET Variables), include them in $dnsUpdateURL.
     *   - $For custom requests, $dnsUpdateURL is parsed for '%IP%', which is replaced with the new IP.
     */
    function updatedns ($dnsService = '', $dnsHost = '', $dnsUser = '', $dnsPass = '',
                $dnsWildcard = 'OFF', $dnsMX = '', $dnsIf = '', $dnsBackMX = '',
                $dnsServer = '', $dnsPort = '', $dnsUpdateURL = '', $forceUpdate = false,
                $dnsZoneID ='', $dnsTTL='', $dnsResultMatch = '', $dnsRequestIf = '',
                $dnsID = '', $dnsVerboseLog = false, $curlIpresolveV4 = false, $curlSslVerifypeer = true) {

        /* XXX because the call stack is upside down we need to reassemble config parts here... */
        $conf = array('host' => $dnsHost, 'id' => $dnsID, 'interface' => $dnsIf);
        $this->_cacheFile = dyndns_cache_file($conf, 4);
        $this->_cacheFile_v6 = dyndns_cache_file($conf, 6);
        $this->_debugFile = dyndns_cache_file($conf, 4) . '.debug';

        $this->_curlIpresolveV4 = $curlIpresolveV4;
        $this->_curlSslVerifypeer = $curlSslVerifypeer;
        $this->_dnsVerboseLog = $dnsVerboseLog;
        if ($this->_dnsVerboseLog)
            log_error("Dynamic DNS: updatedns() starting");

        $dyndnslck = lock("DDNS".$dnsID, LOCK_EX);

        if (!$dnsService) $this->_error(2);
        switch ($dnsService) {
        case 'freedns':
            if (!$dnsHost) $this->_error(5);
            break;
        case 'namecheap':
            if (!$dnsPass) $this->_error(4);
            if (!$dnsHost) $this->_error(5);
            break;
        case 'route53':
            if (!$dnsZoneID) $this->_error(8);
            if (!$dnsTTL) $this->_error(9);
            break;
        case 'custom':
            if (!$dnsUpdateURL) $this->_error(7);
            break;
        case 'duckdns':
            if (!$dnsUser) $this->_error(3);
            if (!$dnsHost) $this->_error(5);
            break;
        default:
            if (!$dnsUser) $this->_error(3);
            if (!$dnsPass) $this->_error(4);
            if (!$dnsHost) $this->_error(5);
            break;
        }

        switch ($dnsService) {
        case 'he-net-v6':
        case 'custom-v6':
            $this->_useIPv6 = true;
            break;
        default:
            $this->_useIPv6 = false;
        }
        $this->_dnsService = strtolower($dnsService);
        $this->_dnsUser = $dnsUser;
        $this->_dnsPass = $dnsPass;
        $this->_dnsHost = $dnsHost;
        $this->_dnsServer = $dnsServer;
        $this->_dnsPort = $dnsPort;
        $this->_dnsWildcard = $dnsWildcard;
        $this->_dnsMX = $dnsMX;
        $this->_dnsZoneID = $dnsZoneID;
        $this->_dnsTTL = $dnsTTL;
        $this->_if = get_failover_interface($dnsIf);
        $this->_checkIP();
        $this->_dnsUpdateURL = $dnsUpdateURL;
        $this->_dnsResultMatch = $dnsResultMatch;
        $this->_dnsRequestIf = get_failover_interface($dnsRequestIf);
        if ($this->_dnsVerboseLog)
            log_error("Dynamic DNS ({$this->_dnsHost}): running get_failover_interface for {$dnsRequestIf}. found {$this->_dnsRequestIf}");
        $this->_dnsRequestIfIP = get_interface_ip($dnsRequestIf);
        $this->_dnsMaxCacheAgeDays = 25;
        $this->_dnsDummyUpdateDone = false;
        $this->_forceUpdateNeeded = $forceUpdate;

        // Ensure that we were able to lookup the IP
        if(!is_ipaddr($this->_dnsIP)) {
            log_error("Dynamic DNS ({$this->_dnsHost}) There was an error trying to determine the public IP for interface - {$dnsIf}({$this->_if}). Probably interface is not a WAN interface.");
            unlock($dyndnslck);
            return;
        }

        $this->_debugID = rand(1000000, 9999999);

        if ($forceUpdate == false && $this->_detectChange() == false) {
            $this->_error(10);
        } else {
            switch ($this->_dnsService) {
            case 'dnsomatic':
            case 'dyndns':
            case 'dyndns-static':
            case 'dyndns-custom':
            case 'dhs':
            case 'noip':
            case 'noip-free':
            case 'easydns':
            case 'hn':
            case 'zoneedit':
            case 'dyns':
            case 'ods':
            case 'freedns':
            case 'loopia':
            case 'staticcling':
            case 'dnsexit':
            case 'custom':
            case 'custom-v6':
            case 'opendns':
            case 'namecheap':
            case 'he-net':
            case 'he-net-v6':
            case 'selfhost':
            case 'he-net-tunnelbroker':
            case 'route53':
            case 'cloudflare':
            case 'eurodns':
            case 'gratisdns':
            case 'ovh-dynhost':
            case 'googledomains':
            case 'citynetwork':
            case 'duckdns':
                $this->_update();
                if($this->_dnsDummyUpdateDone == true) {
                    // If a dummy update was needed, then sleep a while and do the update again to put the proper address back.
                    // Some providers (e.g. No-IP free accounts) need to have at least 1 address change every month.
                    // If the address has not changed recently, or the user did "Force Update", then the code does
                    // a dummy address change for providers like this.
                    sleep(10);
                    $this->_update();
                }
                break;
            default:
                $this->_error(6);
                break;
            }
        }

        unlock($dyndnslck);
    }

    /*
     * Private Function (added 12 July 05) [beta]
     *   Send Update To Selected Service.
     */
    function _update() {

        if ($this->_dnsVerboseLog)
            log_error("Dynamic DNS ({$this->_dnsHost}): _update() starting.");

        if ($this->_dnsService != 'ods' and $this->_dnsService != 'route53 ') {
            $ch = curl_init();
            curl_setopt($ch, CURLOPT_HEADER, 0);
            curl_setopt($ch, CURLOPT_USERAGENT, $this->_UserAgent);
            curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);
            curl_setopt($ch, CURLOPT_INTERFACE, $this->_dnsRequestIfIP);
            curl_setopt($ch, CURLOPT_TIMEOUT, 120); // Completely empirical
        }

        switch ($this->_dnsService) {
            case 'dyndns':
            case 'dyndns-static':
            case 'dyndns-custom':
                if ($this->_dnsVerboseLog)
                    log_error("Dynamic DNS: ({$this->_dnsHost}) DNS update() starting.");
                if (isset($this->_dnsWildcard) && $this->_dnsWildcard != "OFF") $this->_dnsWildcard = "ON";
                curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
                curl_setopt($ch, CURLOPT_USERPWD, $this->_dnsUser.':'.$this->_dnsPass);
                $server = "https://members.dyndns.org/nic/update";
                $port = "";
                if($this->_dnsServer)
                    $server = $this->_dnsServer;
                if($this->_dnsPort)
                    $port = ":" . $this->_dnsPort;
                curl_setopt($ch, CURLOPT_URL, $server .$port . '?system=dyndns&hostname=' . $this->_dnsHost . '&myip=' . $this->_dnsIP . '&wildcard='.$this->_dnsWildcard . '&mx=' . $this->_dnsMX . '&backmx=NO');
                break;
            case 'dhs':
                $post_data['hostscmd'] = 'edit';
                $post_data['hostscmdstage'] = '2';
                $post_data['type'] = '4';
                $post_data['updatetype'] = 'Online';
                $post_data['mx'] = $this->_dnsMX;
                $post_data['mx2'] = '';
                $post_data['txt'] = '';
                $post_data['offline_url'] = '';
                $post_data['cloak'] = 'Y';
                $post_data['cloak_title'] = '';
                $post_data['ip'] = $this->_dnsIP;
                $post_data['domain'] = 'dyn.dhs.org';
                $post_data['hostname'] = $this->_dnsHost;
                $post_data['submit'] = 'Update';
                curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
                $server = "https://members.dhs.org/nic/hosts";
                $port = "";
                if($this->_dnsServer)
                    $server = $this->_dnsServer;
                if($this->_dnsPort)
                    $port = ":" . $this->_dnsPort;
                curl_setopt($ch, CURLOPT_URL, '{$server}{$port}');
                curl_setopt($ch, CURLOPT_USERPWD, $this->_dnsUser.':'.$this->_dnsPass);
                curl_setopt($ch, CURLOPT_POSTFIELDS, $post_data);
                break;
            case 'noip':
            case 'noip-free':
                curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
                $server = "https://dynupdate.no-ip.com/ducupdate.php";
                $port = "";
                if($this->_dnsServer)
                    $server = $this->_dnsServer;
                if($this->_dnsPort)
                    $port = ":" . $this->_dnsPort;
                if(($this->_dnsService == "noip-free") &&
                   ($this->_forceUpdateNeeded == true) &&
                   ($this->_dnsDummyUpdateDone == false)) {
                    // Update the IP to a dummy value to force No-IP free accounts to see a change.
                    $iptoset = "192.168.1.1";
                    $this->_dnsDummyUpdateDone = true;
                    log_error("Dynamic DNS ({$this->_dnsHost}): Processing dummy update on No-IP free account. IP temporarily set to " . $iptoset);
                } else {
                    $iptoset = $this->_dnsIP;
                }
                curl_setopt($ch, CURLOPT_URL, $server . $port . '?username=' . urlencode($this->_dnsUser) . '&pass=' . urlencode($this->_dnsPass) . '&hostname=' . $this->_dnsHost.'&ip=' . $iptoset);
                break;
            case 'easydns':
                curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, TRUE);
                curl_setopt($ch, CURLOPT_USERPWD, $this->_dnsUser.':'.$this->_dnsPass);
                $server = "https://members.easydns.com/dyn/dyndns.php";
                $port = "";
                if($this->_dnsServer)
                    $server = $this->_dnsServer;
                if($this->_dnsPort)
                    $port = ":" . $this->_dnsPort;
                curl_setopt($ch, CURLOPT_URL, $server . $port . '?hostname=' . $this->_dnsHost . '&myip=' . $this->_dnsIP . '&wildcard=' . $this->_dnsWildcard . '&mx=' . $this->_dnsMX . '&backmx=' . $this->_dnsBackMX);
                break;
            case 'hn':
                curl_setopt($ch, CURLOPT_USERPWD, $this->_dnsUser.':'.$this->_dnsPass);
                $server = "http://dup.hn.org/vanity/update";
                $port = "";
                if($this->_dnsServer)
                    $server = $this->_dnsServer;
                if($this->_dnsPort)
                    $port = ":" . $this->_dnsPort;
                curl_setopt($ch, CURLOPT_URL, $server . $port . '?ver=1&IP=' . $this->_dnsIP);
                break;
            case 'zoneedit':
                curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
                curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, FALSE);
                curl_setopt($ch, CURLOPT_USERPWD, $this->_dnsUser.':'.$this->_dnsPass);

                $server = "https://dynamic.zoneedit.com/auth/dynamic.html";
                $port = "";
                if($this->_dnsServer)
                    $server = $this->_dnsServer;
                if($this->_dnsPort)
                    $port = ":" . $this->_dnsPort;
                curl_setopt($ch, CURLOPT_URL, "{$server}{$port}?host=" .$this->_dnsHost);
                break;
            case 'dyns':
                $server = "https://www.dyns.cx/postscript011.php";
                $port = "";
                if($this->_dnsServer)
                    $server = $this->_dnsServer;
                if($this->_dnsPort)
                    $port = ":" . $this->_dnsPort;
                curl_setopt($ch, CURLOPT_URL, $server . $port . '?username=' . urlencode($this->_dnsUser) . '&password=' . $this->_dnsPass . '&host=' . $this->_dnsHost);
                break;
            case 'ods':
                $misc_errno = 0;
                $misc_error = "";
                $server = "ods.org";
                $port = "";
                if($this->_dnsServer)
                    $server = $this->_dnsServer;
                if($this->_dnsPort)
                    $port = ":" . $this->_dnsPort;
                $this->con['socket'] = fsockopen("{$server}{$port}", "7070", $misc_errno, $misc_error, 30);
                /* Check that we have connected */
                if (!$this->con['socket']) {
                    print "error! could not connect.";
                    break;
                }
                /* Here is the loop. Read the incoming data (from the socket connection) */
                while (!feof($this->con['socket'])) {
                    $this->con['buffer']['all'] = trim(fgets($this->con['socket'], 4096));
                    $code = substr($this->con['buffer']['all'], 0, 3);
                    sleep(1);
                    switch($code) {
                        case 100:
                            fputs($this->con['socket'], "LOGIN ".$this->_dnsUser." ".$this->_dnsPass."\n");
                            break;
                        case 225:
                            fputs($this->con['socket'], "DELRR ".$this->_dnsHost." A\n");
                            break;
                        case 901:
                            fputs($this->con['socket'], "ADDRR ".$this->_dnsHost." A ".$this->_dnsIP."\n");
                            break;
                        case 795:
                            fputs($this->con['socket'], "QUIT\n");
                            break;
                    }
                }
                $this->_checkStatus(0, $code);
                break;
            case 'freedns':
                curl_setopt($ch, CURLOPT_URL, 'https://freedns.afraid.org/dynamic/update.php?' . $this->_dnsPass);
                break;
            case 'dnsexit':
                curl_setopt($ch, CURLOPT_URL, 'https://www.dnsexit.com/RemoteUpdate.sv?login='.$this->_dnsUser. '&password='.$this->_dnsPass.'&host='.$this->_dnsHost.'&myip='.$this->_dnsIP);
                break;
            case 'loopia':
                curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
                curl_setopt($ch, CURLOPT_USERPWD, $this->_dnsUser.':'.$this->_dnsPass);
                curl_setopt($ch, CURLOPT_URL, 'https://dns.loopia.se/XDynDNSServer/XDynDNS.php?hostname='.$this->_dnsHost.'&myip='.$this->_dnsIP);
                break;
            case 'opendns':
                if (isset($this->_dnsWildcard) && $this->_dnsWildcard != "OFF") $this->_dnsWildcard = "ON";
                curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, TRUE);
                curl_setopt($ch, CURLOPT_USERPWD, $this->_dnsUser.':'.$this->_dnsPass);
                $server = "https://updates.opendns.com/nic/update?hostname=". $this->_dnsHost;
                $port = "";
                if($this->_dnsServer)
                    $server = $this->_dnsServer;
                if($this->_dnsPort)
                    $port = ":" . $this->_dnsPort;
                curl_setopt($ch, CURLOPT_URL, $server .$port);
                break;

            case 'staticcling':
                curl_setopt($ch, CURLOPT_URL, 'https://www.staticcling.org/update.html?login='.$this->_dnsUser.'&pass='.$this->_dnsPass);
                break;
            case 'dnsomatic':
                /* Example syntax
                    https://username:password@updates.dnsomatic.com/nic/update?hostname=yourhostname&myip=ipaddress&wildcard=NOCHG&mx=NOCHG&backmx=NOCHG
                */
                if ($this->_dnsVerboseLog)
                    log_error("DNS-O-Matic: DNS update() starting.");
                if (isset($this->_dnsWildcard) && $this->_dnsWildcard != "OFF") $this->_dnsWildcard = "ON";
                curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
                /*
                Reference: https://www.dnsomatic.com/wiki/api
                    DNS-O-Matic usernames are 3-25 characters.
                    DNS-O-Matic passwords are 6-20 characters.
                    All ASCII letters and numbers accepted.
                    Dots, dashes, and underscores allowed, but not at the beginning or end of the string.
                Required: "rawurlencode" http://www.php.net/manual/en/function.rawurlencode.php
                    Encodes the given string according to RFC 3986.
                */
                $server = "https://" . rawurlencode($this->_dnsUser) . ":" . rawurlencode($this->_dnsPass) . "@updates.dnsomatic.com/nic/update?hostname=";
                if($this->_dnsServer)
                    $server = $this->_dnsServer;
                if($this->_dnsPort)
                    $port = ":" . $this->_dnsPort;
                curl_setopt($ch, CURLOPT_URL, $server . $this->_dnsHost . '&myip=' . $this->_dnsIP . '&wildcard='.$this->_dnsWildcard . '&mx=' . $this->_dnsMX . '&backmx=NOCHG');
                break;
            case 'namecheap':
                /* Example:
                    https://dynamicdns.park-your-domain.com/update?host=[host_name]&domain=[domain.com]&password=[domain_password]&ip=[your_ip]
                */
                if ($this->_dnsVerboseLog)
                    log_error("Namecheap ({$this->_dnsHost}): DNS update() starting.");
                curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
                $dparts = explode(".", trim($this->_dnsHost));
                $domain_part_count = ($dparts[count($dparts)-1] == "uk") ? 3 : 2;
                $domain_offset = count($dparts) - $domain_part_count;
                $hostname = implode(".", array_slice($dparts, 0, $domain_offset));
                $domain = implode(".", array_slice($dparts, $domain_offset));
                $dnspass = trim($this->_dnsPass);
                $server = "https://dynamicdns.park-your-domain.com/update?host={$hostname}&domain={$domain}&password={$dnspass}&ip={$this->_dnsIP}";
                curl_setopt($ch, CURLOPT_URL, $server);
                break;
            case 'he-net':
            case 'he-net-v6':
                if ($this->_dnsVerboseLog)
                    log_error("HE.net ({$this->_dnsHost}): DNS update() starting.");
                $server = "https://dyn.dns.he.net/nic/update?";
                curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
                curl_setopt($ch, CURLOPT_IPRESOLVE, CURL_IPRESOLVE_V4 );
                curl_setopt($ch, CURLOPT_URL, $server . 'hostname=' . $this->_dnsHost . '&password=' . $this->_dnsPass . '&myip=' . $this->_dnsIP);
                break;
            case 'he-net-tunnelbroker':
                if ($this->_dnsVerboseLog)
                    log_error("HE.net Tunnelbroker: DNS update() starting.");
                $server = "https://ipv4.tunnelbroker.net/ipv4_end.php?";
                curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, TRUE);
                curl_setopt($ch, CURLOPT_USERPWD, $this->_dnsUser . ':' . $this->_dnsPass);
                curl_setopt($ch, CURLOPT_URL, $server . 'tid=' . $this->_dnsHost);
                break;
            case 'selfhost':
                if ($this->_dnsVerboseLog)
                    log_error("SelfHost: DNS update() starting.");
                if (isset($this->_dnsWildcard) && $this->_dnsWildcard != "OFF") $this->_dnsWildcard = "ON";
                curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, TRUE);
                curl_setopt($ch, CURLOPT_USERPWD, $this->_dnsUser.':'.$this->_dnsPass);
                $server = "https://carol.selfhost.de/nic/update";
                $port = "";
                if($this->_dnsServer)
                    $server = $this->_dnsServer;
                if($this->_dnsPort)
                    $port = ":" . $this->_dnsPort;
                curl_setopt($ch, CURLOPT_URL, $server .$port . '?system=dyndns&hostname=' . $this->_dnsHost . '&myip=' . $this->_dnsIP . '&wildcard='.$this->_dnsWildcard . '&mx=' . $this->_dnsMX . '&backmx=NO');
                break;
            case 'route53':
                if ($this->_dnsVerboseLog)
                    log_error("Route53 ({$this->_dnsHost}): DNS update() starting.");

                /* Setting Variables */
                $hostname = "{$this->_dnsHost}.";
                $ZoneID = $this->_dnsZoneID;
                $AccessKeyId=$this->_dnsUser;
                $SecretAccessKey=$this->_dnsPass;
                $NewIP=$this->_dnsIP;
                $NewTTL=$this->_dnsTTL;

                /* Set Amazon AWS Credentials for this record */
                $r53 = new Route53($AccessKeyId, $SecretAccessKey);

                /* Function to find old values of records in Route 53 */
                if(!function_exists('Searchrecords')) {
                    function SearchRecords($records, $name) {
                        if (!is_array($records)) {
                            return false;
                        }
                        $result = array();
                        foreach($records as $record) {
                            if(strtolower($record['Name']) == strtolower($name)) {
                                $result [] = $record;
                            }
                        }
                        return ($result) ? $result : false;
                    }
                }

                $records = $r53->listResourceRecordSets("/hostedzone/$ZoneID");

                /* Get IP for your hostname in Route 53 */
                if(false !== ($a_result = SearchRecords($records['ResourceRecordSets'], "$hostname"))) {
                    $OldTTL=$a_result[0][TTL];
                    $OldIP=$a_result[0][ResourceRecords][0];
                } else {
                    $OldIP="";
                }

                /* Check if we need to update DNS Record */
                if ($OldIP !== $NewIP) {
                    if(!empty($OldIP)) {
                        /* Your Hostname already exists, deleting and creating it again */
                        $changes = array();
                        $changes[] = $r53->prepareChange(DELETE, $hostname, A, $OldTTL, $OldIP);
                        $changes[] = $r53->prepareChange(CREATE, $hostname, A, $NewTTL, $NewIP);
                        $result = $r53->changeResourceRecordSets("/hostedzone/$ZoneID", $changes);
                    } else {
                        /* Your Hostname does not exist yet, creating it */
                        $changes = $r53->prepareChange(CREATE, $hostname, A, $NewTTL, $NewIP);
                        $result = $r53->changeResourceRecordSets("/hostedzone/$ZoneID", $changes);
                    }
                }
                $this->_checkStatus(0, $result);
                break;
            case 'custom':
            case 'custom-v6':
                if ($this->_dnsVerboseLog)
                    log_error("Custom dynamic DNS ({$this->_dnsHost}): DNS update() starting.");
                if ($this->_dnsUser != '') {
                    if ($this->_curlIpresolveV4)
                        curl_setopt($ch, CURLOPT_IPRESOLVE, CURL_IPRESOLVE_V4 );
                    if ($this->_curlSslVerifypeer)
                        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, TRUE);
                    else
                        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
                    curl_setopt($ch, CURLOPT_HTTPAUTH, CURLAUTH_ANY);
                    curl_setopt($ch, CURLOPT_USERPWD, "{$this->_dnsUser}:{$this->_dnsPass}");
                }
                $server = str_replace("%IP%", $this->_dnsIP, $this->_dnsUpdateURL);
                if ($this->_dnsVerboseLog)
                    log_error("Sending request to: ".$server);
                curl_setopt($ch, CURLOPT_URL, $server);
                break;
            case 'cloudflare':
                $dnsServer ='api.cloudflare.com';
                $dnsHost = str_replace(' ','', $this->_dnsHost);
                $host_names = explode('.', $dnsHost);
                $bottom_host_name = $host_names[count($host_names) - 2] . '.' . $host_names[count($host_names) - 1];

                curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
                curl_setopt($ch, CURLOPT_HTTPHEADER, array(
                    'X-Auth-Email: '.$this->_dnsUser.'',
                    'X-Auth-Key: '.$this->_dnsPass.'',
                    'Content-Type: application/json'
                ));

                // Get zone ID
                $getZoneId = "https://{$dnsServer}/client/v4/zones/?name={$bottom_host_name}";
                curl_setopt($ch, CURLOPT_URL, $getZoneId);
                $output = json_decode(curl_exec($ch));
                $zone = $output->result[0]->id;
                if ($zone){ // If zone ID was found get host ID
                    $getHostId = "https://{$dnsServer}/client/v4/zones/{$zone}/dns_records?name={$this->_dnsHost}";
                    curl_setopt($ch, CURLOPT_URL, $getHostId);
                    $output = json_decode(curl_exec($ch));
                    $host = $output->result[0]->id;
                    if ($host){ // If host ID was found update host
                        $hostData = array(
                            "content" => "{$this->_dnsIP}",
                            "type" => "A",
                            "name" => "{$this->_dnsHost}",
                            "proxiable" => false,
                            "proxied" => false
                        );
                        $data_json = json_encode($hostData);
                        $updateHostId = "https://{$dnsServer}/client/v4/zones/{$zone}/dns_records/{$host}";
                        curl_setopt($ch, CURLOPT_URL, $updateHostId);
                        curl_setopt($ch, CURLOPT_CUSTOMREQUEST, 'PUT');
                        curl_setopt($ch, CURLOPT_POSTFIELDS, $data_json);
                    }
                }
                break;
            case 'eurodns':
                if ($this->_dnsVerboseLog)
                    log_error("EuroDNS ({$this->_dnsHost}) DNS update() starting.");
                curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
                curl_setopt($ch, CURLOPT_USERPWD, $this->_dnsUser.':'.$this->_dnsPass);
                $server = "https://eurodyndns.org/update/";
                $port = "";
                if($this->_dnsPort)
                    $port = ":" . $this->_dnsPort;
                curl_setopt($ch, CURLOPT_URL, $server .$port . '?hostname=' . $this->_dnsHost . '&myip=' . $this->_dnsIP);
                break;
            case 'gratisdns':
                if ($this->_dnsVerboseLog)
                    log_error("GratisDNS.dk ({$this->_dnsHost}): DNS update() starting.");
                $server = "https://ssl.gratisdns.dk/ddns.phtml";
                curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, TRUE);
                list($hostname, $domain) = explode(".", $this->_dnsHost, 2);
                curl_setopt($ch, CURLOPT_URL, $server . '?u=' . $this->_dnsUser . '&p=' . $this->_dnsPass . '&h=' . $this->_dnsHost . '&d=' . $domain);
                break;
            case 'ovh-dynhost':
                if ($this->_dnsVerboseLog)
                    log_error("OVH DynHOST: ({$this->_dnsHost}) DNS update() starting.");
                if (isset($this->_dnsWildcard) && $this->_dnsWildcard != "OFF") $this->_dnsWildcard = "ON";
                curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, TRUE);
                curl_setopt($ch, CURLOPT_USERPWD, $this->_dnsUser.':'.$this->_dnsPass);
                $server = "https://www.ovh.com/nic/update";
                $port = "";
                if($this->_dnsServer)
                    $server = $this->_dnsServer;
                if($this->_dnsPort)
                    $port = ":" . $this->_dnsPort;
                curl_setopt($ch, CURLOPT_URL, $server .$port . '?system=dyndns&hostname=' . $this->_dnsHost . '&myip=' . $this->_dnsIP . '&wildcard='.$this->_dnsWildcard . '&mx=' . $this->_dnsMX . '&backmx=NO');
                break;
            case 'citynetwork':
                if ($this->_dnsVerboseLog)
                    log_error("City Network: ({$this->_dnsHost}) DNS update() starting.");
                curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, TRUE);
                curl_setopt($ch, CURLOPT_USERPWD, $this->_dnsUser.':'.$this->_dnsPass);
                $server = 'https://dyndns.citynetwork.se/nic/update';
                $port = "";
                if($this->_dnsServer)
                    $server = $this->_dnsServer;
                if($this->_dnsPort)
                    $port = ":" . $this->_dnsPort;
                curl_setopt($ch, CURLOPT_URL, $server .$port . '?hostname=' . $this->_dnsHost . '&myip=' . $this->_dnsIP);
                break;
            case 'duckdns':
                if ($this->_dnsVerboseLog)
                    log_error("Duck DNS ({$this->_dnsHost}): DNS update() starting.");
                $server = "https://www.duckdns.org/update";
                curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, TRUE);
                curl_setopt($ch, CURLOPT_URL, $server . '?domains=' . str_replace('.duckdns.org', '', $this->_dnsHost) . '&token=' . $this->_dnsUser);
                break;
            case 'googledomains':
                if ($this->_dnsVerboseLog)
                    log_error("Google Domains: ({$this->_dnsHost}): DNS update() starting.");
                $server = "https://domains.google.com/nic/update";
                $post_data['hostname'] = $this->_dnsHost;
                $post_data['myip'] = $this->_dnsIP;
                $post_data['offline'] = 'no';
                curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, TRUE);
                curl_setopt($ch, CURLOPT_USERPWD, $this->_dnsUser.':'.$this->_dnsPass);
                curl_setopt($ch, CURLOPT_POSTFIELDS, $post_data);
                curl_setopt($ch, CURLOPT_URL, $server);
                curl_setopt($ch, CURLOPT_IPRESOLVE, CURL_IPRESOLVE_V4);
                break;
            default:
                break;
        }
        if ($this->_dnsService != 'ods' and $this->_dnsService != 'route53') {
            $data = curl_exec($ch);
            $this->_checkStatus($ch, $data);
            @curl_close($ch);
        }
    }

    /*
     * Private Function (added 12 July 2005) [beta]
     *   Retrieve Update Status
     */
    function _checkStatus($ch, $data) {
        if ($this->_dnsVerboseLog) {
            log_error("Dynamic DNS ({$this->_dnsHost}): _checkStatus() starting.");
            log_error("Dynamic DNS ({$this->_dnsHost}): Current Service: {$this->_dnsService}");
        }
        $successful_update = false;
        if ($this->_dnsService != 'ods' and $this->_dnsService != 'route53' && @curl_error($ch)) {
            $status = "Curl error occurred: " . curl_error($ch);
            log_error($status);
            $this->status = $status;
            return;
        }
        switch ($this->_dnsService) {
            case 'dnsomatic':
                if (preg_match('/badauth/i', $data)) {
                    $status = "DNS-O-Matic ({$this->_dnsHost}): The DNS-O-Matic username or password specified are incorrect. No updates will be distributed to services until this is resolved.";
                } else if (preg_match('/notfqdn /i', $data)) {
                    $status = "DNS-O-Matic ({$this->_dnsHost}): The hostname specified is not a fully-qualified domain name. If no hostnames included, notfqdn will be returned once.";
                } else if (preg_match('/nohost/i', $data)) {
                    $status = "DNS-O-Matic ({$this->_dnsHost}): The hostname passed could not be matched to any services configured. The service field will be blank in the return code.";
                } else if (preg_match('/numhost/i', $data)) {
                    $status = "DNS-O-Matic ({$this->_dnsHost}): You may update up to 20 hosts. numhost is returned if you try to update more than 20 or update a round-robin.";
                } else if (preg_match('/abuse/i', $data)) {
                    $status = "DNS-O-Matic ({$this->_dnsHost}): The hostname is blocked for update abuse.";
                } else if (preg_match('/good/i', $data)) {
                    $status = "DNS-O-Matic ({$this->_dnsHost}): (Success) IP Address Changed Successfully! (".$this->_dnsIP.")";
                    $successful_update = true;
                } else if (preg_match('/dnserr/i', $data)) {
                    $status = "DNS-O-Matic ({$this->_dnsHost}): DNS error encountered. Stop updating for 30 minutes.";
                } else {
                    $status = "DNS-O-Matic ({$this->_dnsHost}): (Unknown Response)";
                    log_error("DNS-O-Matic ({$this->_dnsHost}): PAYLOAD: {$data}");
                    $this->_debug($data);
                }
                break;
            case 'citynetwork':
                if (preg_match('/notfqdn/i', $data)) {
                    $status = "Dynamic DNS ({$this->_dnsHost}): (Error) Not A FQDN!";
                } else if (preg_match('/nohost/i', $data)) {
                    $status = "Dynamic DNS ({$this->_dnsHost}): (Error) No such host";
                } else if (preg_match('/nochg/i', $data)) {
                    $status = "Dynamic DNS ({$this->_dnsHost}): (Success) No Change In IP Address";
                    $successful_update = true;
                } else if (preg_match('/good/i', $data)) {
                    $status = "Dynamic DNS ({$this->_dnsHost}): (Success) IP Address Changed Successfully! (".$this->_dnsIP.")";
                    $successful_update = true;
                } else if (preg_match('/badauth/i', $data)) {
                    $status = "Dynamic DNS ({$this->_dnsHost}): (Error) User Authorization Failed";
                } else {
                    $status = "Dynamic DNS ({$this->_dnsHost}): (Unknown Response)";
                    log_error("Dynamic DNS ({$this->_dnsHost}): PAYLOAD: {$data}");
                    $this->_debug($data);
                }
                break;
            case 'ovh-dynhost':
            case 'dyndns':
                if (preg_match('/notfqdn/i', $data)) {
                    $status = "Dynamic DNS ({$this->_dnsHost}): (Error) Not A FQDN!";
                } else if (preg_match('/nochg/i', $data)) {
                    $status = "Dynamic DNS ({$this->_dnsHost}): (Success) No Change In IP Address";
                    $successful_update = true;
                } else if (preg_match('/good/i', $data)) {
                    $status = "Dynamic DNS ({$this->_dnsHost}): (Success) IP Address Changed Successfully! (".$this->_dnsIP.")";
                    $successful_update = true;
                } else if (preg_match('/noauth/i', $data)) {
                    $status = "Dynamic DNS ({$this->_dnsHost}): (Error) User Authorization Failed";
                } else {
                    $status = "Dynamic DNS ({$this->_dnsHost}): (Unknown Response)";
                    log_error("Dynamic DNS ({$this->_dnsHost}): PAYLOAD: {$data}");
                    $this->_debug($data);
                }
                break;
            case 'dyndns-static':
                if (preg_match('/notfqdn/i', $data)) {
                    $status = "Dynamic DNS ({$this->_dnsHost}): (Error) Not A FQDN!";
                } else if (preg_match('/nochg/i', $data)) {
                    $status = "Dynamic DNS ({$this->_dnsHost}): (Success) No Change In IP Address";
                    $successful_update = true;
                } else if (preg_match('/good/i', $data)) {
                    $status = "Dynamic DNS ({$this->_dnsHost}): (Success) IP Address Changed Successfully!";
                    $successful_update = true;
                } else if (preg_match('/noauth/i', $data)) {
                    $status = "Dynamic DNS ({$this->_dnsHost}): (Error) User Authorization Failed";
                } else {
                    $status = "Dynamic DNS ({$this->_dnsHost}): (Unknown Response)";
                    log_error("Dynamic DNS ({$this->_dnsHost}): PAYLOAD: {$data}");
                    $this->_debug($data);
                }
                break;
            case 'dyndns-custom':
                if (preg_match('/notfqdn/i', $data)) {
                    $status = "Dynamic DNS ({$this->_dnsHost}): (Error) Not A FQDN!";
                } else if (preg_match('/nochg/i', $data)) {
                    $status = "Dynamic DNS: (Success) No Change In IP Address";
                    $successful_update = true;
                } else if (preg_match('/good/i', $data)) {
                    $status = "Dynamic DNS ({$this->_dnsHost}): (Success) IP Address Changed Successfully!";
                    $successful_update = true;
                } else if (preg_match('/noauth/i', $data)) {
                    $status = "Dynamic DNS ({$this->_dnsHost}): (Error) User Authorization Failed";
                } else {
                    $status = "Dynamic DNS ({$this->_dnsHost}): (Unknown Response)";
                    log_error("Dynamic DNS ({$this->_dnsHost}): PAYLOAD: {$data}");
                    $this->_debug($data);
                }
                break;
            case 'dhs':
                break;
            case 'noip':
            case 'noip-free':
                list($ip,$code) = explode(":",$data);
                switch ($code) {
                    case 0:
                        $status = "Dynamic DNS ({$this->_dnsHost}): (Success) IP address is current, no update performed.";
                        $successful_update = true;
                        break;
                    case 1:
                        $status = "Dynamic DNS ({$this->_dnsHost}): (Success) DNS hostname update successful.";
                        $successful_update = true;
                        break;
                    case 2:
                        $status = "Dynamic DNS ({$this->_dnsHost}): (Error) Hostname supplied does not exist.";
                        break;
                    case 3:
                        $status = "Dynamic DNS ({$this->_dnsHost}): (Error) Invalid Username.";
                        break;
                    case 4:
                        $status = "Dynamic DNS ({$this->_dnsHost}): (Error) Invalid Password.";
                        break;
                    case 5:
                        $status = "Dynamic DNS ({$this->_dnsHost}): (Error) To many updates sent.";
                        break;
                    case 6:
                        $status = "Dynamic DNS ({$this->_dnsHost}): (Error) Account disabled due to violation of No-IP terms of service.";
                        break;
                    case 7:
                        $status = "Dynamic DNS ({$this->_dnsHost}): (Error) Invalid IP. IP Address submitted is improperly formatted or is a private IP address or is on a blacklist.";
                        break;
                    case 8:
                        $status = "Dynamic DNS ({$this->_dnsHost}): (Error) Disabled / Locked Hostname.";
                        break;
                    case 9:
                        $status = "Dynamic DNS ({$this->_dnsHost}): (Error) Host updated is configured as a web redirect and no update was performed.";
                        break;
                    case 10:
                        $status = "Dynamic DNS ({$this->_dnsHost}): (Error) Group supplied does not exist.";
                        break;
                    case 11:
                        $status = "Dynamic DNS ({$this->_dnsHost}): (Success) DNS group update is successful.";
                        $successful_update = true;
                        break;
                    case 12:
                        $status = "Dynamic DNS ({$this->_dnsHost}): (Success) DNS group is current, no update performed.";
                        $successful_update = true;
                        break;
                    case 13:
                        $status = "Dynamic DNS ({$this->_dnsHost}): (Error) Update client support not available for supplied hostname or group.";
                        break;
                    case 14:
                        $status = "Dynamic DNS ({$this->_dnsHost}): (Error) Hostname supplied does not have offline settings configured.";
                        break;
                    case 99:
                        $status = "Dynamic DNS ({$this->_dnsHost}): (Error) Client disabled. Client should exit and not perform any more updates without user intervention.";
                        break;
                    case 100:
                        $status = "Dynamic DNS ({$this->_dnsHost}): (Error) Client disabled. Client should exit and not perform any more updates without user intervention.";
                        break;
                    default:
                        $status = "Dynamic DNS ({$this->_dnsHost}): (Unknown Response)";
                        $this->_debug("Unknown Response: ".$data);
                        break;
                }
                break;
            case 'easydns':
                if (preg_match('/NOACCESS/i', $data)) {
                    $status = "Dynamic DNS ({$this->_dnsHost}): (Error) Authentication Failed: Username and/or Password was Incorrect.";
                } else if (preg_match('/NOSERVICE/i', $data)) {
                    $status = "Dynamic DNS ({$this->_dnsHost}): (Error) No Service: Dynamic DNS Service has been disabled for this domain.";
                } else if (preg_match('/ILLEGAL INPUT/i', $data)) {
                    $status = "Dynamic DNS ({$this->_dnsHost}): (Error) Illegal Input: Self-Explanatory";
                } else if (preg_match('/TOOSOON/i', $data)) {
                    $status = "Dynamic DNS ({$this->_dnsHost}): (Error) Too Soon: Not Enough Time Has Elapsed Since Last Update";
                } else if (preg_match('/NOERROR/i', $data)) {
                    $status = "Dynamic DNS ({$this->_dnsHost}): (Success) IP Updated Successfully!";
                    $successful_update = true;
                } else {
                    $status = "Dynamic DNS ({$this->_dnsHost}): (Unknown Response)";
                    log_error("Dynamic DNS ({$this->_dnsHost}): PAYLOAD: {$data}");
                    $this->_debug($data);
                }
                break;
            case 'hn':
                /* FIXME: add checks */
                break;
            case 'zoneedit':
                if (preg_match('/799/i', $data)) {
                    $status = "Dynamic DNS ({$this->_dnsHost}): (Error 799) Update Failed!";
                } else if (preg_match('/700/i', $data)) {
                    $status = "Dynamic DNS ({$this->_dnsHost}): (Error 700) Update Failed!";
                } else if (preg_match('/200/i', $data)) {
                    $status = "Dynamic DNS ({$this->_dnsHost}): (Success) IP Address Updated Successfully!";
                    $successful_update = true;
                } else if (preg_match('/201/i', $data)) {
                    $status = "Dynamic DNS ({$this->_dnsHost}): (Success) IP Address Updated Successfully!";
                    $successful_update = true;
                } else {
                    $status = "Dynamic DNS ({$this->_dnsHost}): (Unknown Response)";
                    log_error("Dynamic DNS ({$this->_dnsHost}): PAYLOAD: {$data}");
                    $this->_debug($data);
                }
                break;
            case 'dyns':
                if (preg_match("/400/i", $data)) {
                    $status = "Dynamic DNS ({$this->_dnsHost}): (Error) Bad Request - The URL was malformed. Required parameters were not provided.";
                } else if (preg_match('/402/i', $data)) {
                    $status = "Dynamic DNS ({$this->_dnsHost}): (Error) Update Too Soon - You have tried updating to quickly since last change.";
                } else if (preg_match('/403/i', $data)) {
                    $status = "Dynamic DNS ({$this->_dnsHost}): (Error) Database Error - There was a server-sided database error.";
                } else if (preg_match('/405/i', $data)) {
                    $status = "Dynamic DNS ({$this->_dnsHost}): (Error) Hostname Error - The hostname (".$this->_dnsHost.") doesn't belong to you.";
                } else if (preg_match('/200/i', $data)) {
                    $status = "Dynamic DNS ({$this->_dnsHost}): (Success) IP Address Updated Successfully!";
                    $successful_update = true;
                } else {
                    $status = "Dynamic DNS ({$this->_dnsHost}): (Unknown Response)";
                    log_error("Dynamic DNS ({$this->_dnsHost}): PAYLOAD: {$data}");
                    $this->_debug($data);
                }
                break;
            case 'ods':
                if (preg_match("/299/i", $data)) {
                    $status = "Dynamic DNS ({$this->_dnsHost}): (Success) IP Address Updated Successfully!";
                    $successful_update = true;
                } else {
                    $status = "Dynamic DNS ({$this->_dnsHost}): (Unknown Response)";
                    log_error("Dynamic DNS ({$this->_dnsHost}): PAYLOAD: {$data}");
                    $this->_debug($data);
                }
                break;
            case 'freedns':
                if (preg_match("/has not changed./i", $data)) {
                    $status = "Dynamic DNS ({$this->_dnsHost}): (Success) No Change In IP Address";
                    $successful_update = true;
                } else if (preg_match("/Updated/i", $data)) {
                    $status = "Dynamic DNS ({$this->_dnsHost}): (Success) IP Address Changed Successfully!";
                    $successful_update = true;
                } else {
                    $status = "Dynamic DNS ({$this->_dnsHost}): (Unknown Response)";
                    log_error("Dynamic DNS ({$this->_dnsHost}): PAYLOAD: {$data}");
                    $this->_debug($data);
                }
                break;
            case 'dnsexit':
                if (preg_match("/is the same/i", $data)) {
                    $status = "Dynamic DNS ({$this->_dnsHost}): (Success) No Change In IP Address";
                    $successful_update = true;
                } else if (preg_match("/Success/i", $data)) {
                    $status = "Dynamic DNS ({$this->_dnsHost}): (Success) IP Address Changed Successfully!";
                    $successful_update = true;
                } else {
                    $status = "Dynamic DNS ({$this->_dnsHost}): (Unknown Response)";
                    log_error("Dynamic DNS ({$this->_dnsHost}): PAYLOAD: {$data}");
                    $this->_debug($data);
                }
                break;
            case 'loopia':
                if (preg_match("/nochg/i", $data)) {
                    $status = "Dynamic DNS ({$this->_dnsHost}): (Success) No Change In IP Address";
                    $successful_update = true;
                } else if (preg_match("/good/i", $data)) {
                    $status = "Dynamic DNS ({$this->_dnsHost}): (Success) IP Address Changed Successfully!";
                    $successful_update = true;
                } else if (preg_match('/badauth/i', $data)) {
                    $status = "Dynamic DNS ({$this->_dnsHost}): (Error) User Authorization Failed";
                } else {
                    $status = "Dynamic DNS ({$this->_dnsHost}): (Unknown Response)";
                    log_error("Dynamic DNS ({$this->_dnsHost}): PAYLOAD: {$data}");
                    $this->_debug($data);
                }
                break;
            case 'opendns':
                if (preg_match('/badauth/i', $data)) {
                    $status = "Dynamic DNS({$this->_dnsHost}): (Error) Not a valid username or password!";
                } else if (preg_match('/nohost/i', $data)) {
                    $status = "Dynamic DNS ({$this->_dnsHost}): (Error) Hostname you are trying to update does not exist.";
                    $successful_update = true;
                } else if (preg_match('/good/i', $data)) {
                    $status = "Dynamic DNS ({$this->_dnsHost}): (Success) IP Address Changed Successfully! (".$this->_dnsIP.")";
                    $successful_update = true;
                } else if (preg_match('/yours/i', $data)) {
                    $status = "Dynamic DNS ({$this->_dnsHost}): (Error) hostname specified exists, but not under the username specified.";
                } else if (preg_match('/abuse/i', $data)) {
                    $status = "Dynamic DNS ({$this->_dnsHost}): (Error) Updating too frequently, considered abuse.";
                } else {
                    $status = "Dynamic DNS ({$this->_dnsHost}): (Unknown Response)";
                    log_error("Dynamic DNS ({$this->_dnsHost}): PAYLOAD: {$data}");
                    $this->_debug($data);
                }
                break;
            case 'staticcling':
                if (preg_match("/invalid ip/i", $data)) {
                    $status = "Dynamic DNS ({$this->_dnsHost}): (Error) Bad Request - The IP provided was invalid.";
                } else if (preg_match('/required info missing/i', $data)) {
                    $status = "Dynamic DNS ({$this->_dnsHost}): (Error) Bad Request - Required parameters were not provided.";
                } else if (preg_match('/invalid characters/i', $data)) {
                    $status = "Dynamic DNS ({$this->_dnsHost}): (Error) Bad Request - Illegal characters in either the username or the password.";
                } else if (preg_match('/bad password/i', $data)) {
                    $status = "Dynamic DNS ({$this->_dnsHost}): (Error) Invalid password.";
                } else if (preg_match('/account locked/i', $data)) {
                    $status = "Dynamic DNS ({$this->_dnsHost}): (Error) This account has been administratively locked.";
                } else if (preg_match('/update too frequent/i', $data)) {
                    $status = "Dynamic DNS ({$this->_dnsHost}): (Error) Updating too frequently.";
                } else if (preg_match('/DB error/i', $data)) {
                    $status = "Dynamic DNS ({$this->_dnsHost}): (Error) Server side error.";
                } else if (preg_match('/success/i', $data)) {
                    $status = "Dynamic DNS ({$this->_dnsHost}): (Success) IP Address Updated Successfully!";
                    $successful_update = true;
                } else {
                    $status = "Dynamic DNS ({$this->_dnsHost}): (Unknown Response)";
                    log_error("Dynamic DNS ({$this->_dnsHost}): PAYLOAD: {$data}");
                    $this->_debug($data);
                }
                break;
            case 'namecheap':
                $tmp = str_replace("^M", "", $data);
                $ncresponse = @xml2array($tmp);
                if (preg_match("/internal server error/i", $data)) {
                    $status = "Dynamic DNS: (Error) Server side error.";
                } else if (preg_match("/request is badly formed/i", $data)) {
                    $status = "Dynamic DNS: (Error) Badly Formed Request (check your settings).";
                } else if ($ncresponse['interface-response']['ErrCount'] === "0") {
                    $status = "Dynamic DNS: (Success) IP Address Updated Successfully!";
                    $successful_update = true;
                } else if (is_numeric($ncresponse['interface-response']['ErrCount']) && ($ncresponse['interface-response']['ErrCount'] > 0)) {
                    $status = "Dynamic DNS: (Error) " . implode(", ", $ncresponse["interface-response"]["errors"]);
                    $successful_update = true;
                } else {
                    $status = "Dynamic DNS: (Unknown Response)";
                    log_error("Dynamic DNS: PAYLOAD: {$data}");
                    $this->_debug($data);
                }
                break;

            case 'he-net':
            case 'he-net-v6':
                if (preg_match("/badip/i", $data)) {
                    $status = "Dynamic DNS: (Error) Bad Request - The IP provided was invalid.";
                } else if (preg_match('/nohost/i', $data)) {
                    $status = "Dynamic DNS: (Error) Bad Request - A hostname was not provided.";
                } else if (preg_match('/badauth/i', $data)) {
                    $status = "Dynamic DNS: (Error) Invalid username or password.";
                } else if (preg_match('/good/i', $data)) {
                    $status = "Dynamic DNS: (Success) IP Address Updated Successfully!";
                    $successful_update = true;
                } else if (preg_match('/nochg/i', $data)) {
                    $status = "Dynamic DNS: (Success) No Change In IP Address.";
                    $successful_update = true;
                } else {
                    $status = "Dynamic DNS: (Unknown Response)";
                    log_error("Dynamic DNS: PAYLOAD: {$data}");
                    $this->_debug($data);
                }
                break;
            case 'he-net-tunnelbroker':
                /*
                -ERROR: Missing parameter(s).
                -ERROR: Invalid API key or password
                -ERROR: Tunnel not found
                -ERROR: Another tunnel exists for this IP.
                -ERROR: This tunnel is already associated with this IP address
                +OK: Tunnel endpoint updated to: x.x.x.x
                */
                if (preg_match("/Missing parameter/i", $data)) {
                    $status = "Dynamic DNS: (Error) Bad Request - Missing/Invalid Parameters.";
                } else if (preg_match('/Tunnel not found/i', $data)) {
                    $status = "Dynamic DNS: (Error) Bad Request - Invalid Tunnel ID.";
                } else if (preg_match('/Invalid API key or password/i', $data)) {
                    $status = "Dynamic DNS: (Error) Invalid username or password.";
                } else if (preg_match('/OK:/i', $data)) {
                    $status = "Dynamic DNS: (Success) IP Address Updated Successfully!";
                    $successful_update = true;
                } else if (preg_match('/This tunnel is already associated with this IP address/i', $data)) {
                    $status = "Dynamic DNS: (Success) No Change In IP Address.";
                    $successful_update = true;
                } else {
                    $status = "Dynamic DNS: (Unknown Response)";
                    log_error("Dynamic DNS: PAYLOAD: {$data}");
                    $this->_debug($data);
                }
                break;
            case 'selfhost':
                if (preg_match('/notfqdn/i', $data)) {
                    $status = "Dynamic DNS: (Error) Not A FQDN!";
                } else if (preg_match('/nochg/i', $data)) {
                    $status = "Dynamic DNS: (Success) No Change In IP Address";
                    $successful_update = true;
                } else if (preg_match('/good/i', $data)) {
                    $status = "Dynamic DNS: (Success) IP Address Changed Successfully! (".$this->_dnsIP.")";
                    $successful_update = true;
                } else if (preg_match('/noauth/i', $data)) {
                    $status = "Dynamic DNS: (Error) User Authorization Failed";
                } else {
                    $status = "Dynamic DNS: (Unknown Response)";
                    log_error("Dynamic DNS: PAYLOAD: {$data}");
                    $this->_debug($data);
                }
                break;
            case 'route53':
                $successful_update = true;
                break;
            case 'custom':
            case 'custom-v6':
                $successful_update = false;
                if ($this->_dnsResultMatch == "") {
                    $successful_update = true;
                }else {
                    $this->_dnsResultMatch = str_replace("%IP%", $this->_dnsIP, $this->_dnsResultMatch);
                    $matches = preg_split("/(?<!\\\\)\\|/", $this->_dnsResultMatch);
                    foreach($matches as $match) {
                        $match= str_replace("\\|", "|", $match);
                        if(strcmp($match, trim($data, "\t\n\r")) == 0)
                            $successful_update = true;
                    }
                    unset ($matches);
                }
                if ($successful_update == true)
                    $status = "Dynamic DNS: (Success) IP Address Updated Successfully!";
                else
                    $status = "Dynamic DNS: (Error) Result did not match.";
                break;
            case 'cloudflare':
                $output = json_decode($data);
                if ($output->result->content === $this->_dnsIP){
                    $status = "Dynamic DNS: (Success) {$this->_dnsHost} updated to {$this->_dnsIP}";
                    $successful_update = true;
                }
                elseif ($output->errors[0]->code === 9103){
                    $status = "Dynamic DNS ({$this->_dnsHost}): ERROR - Invalid Credentials! Don't forget to use API Key for password field with CloudFlare.";
                }
                elseif (($output->success) && (!$output->result[0]->id)) {
                    $status = "Dynamic DNS ({$this->_dnsHost}): ERROR - Zone or Host ID was not found, check your hostname.";
                }
                else {
                    $status = "Dynamic DNS ({$this->_dnsHost}): UNKNOWN ERROR - {$output->errors[0]->message}";
                    log_error("Dynamic DNS ({$this->_dnsHost}): PAYLOAD: {$data}");
                }
                break;
            case 'eurodns':
                if (preg_match('/notfqdn/i', $data)) {
                    $status = "Dynamic DNS: (Error) Not A FQDN!";
                } else if (preg_match('/nochg/i', $data)) {
                    $status = "Dynamic DNS: (Success) No Change In IP Address";
                    $successful_update = true;
                } else if (preg_match('/good/i', $data)) {
                    $status = "Dynamic DNS: (Success) IP Address Changed Successfully! (".$this->_dnsIP.")";
                    $successful_update = true;
                } else if (preg_match('/badauth/i', $data)) {
                    $status = "Dynamic DNS: (Error) User Authorization Failed";
                } else {
                    $status = "Dynamic DNS: (Unknown Response)";
                    log_error("Dynamic DNS: PAYLOAD: {$data}");
                    $this->_debug($data);
                }
                break;
            case 'gratisdns':
                if (preg_match('/Forkerte værdier/i', $data)) {
                        $status = "Dynamic DNS: (Error) Wrong values - Update could not be completed.";
                } else if (preg_match('/Bruger login: Bruger eksistere ikke/i', $data)) {
                        $status = "Dynamic DNS: (Error) Unknown username - User does not exist.";
                } else if (preg_match('/Bruger login: 1Fejl i kodeord/i', $data)) {
                        $status = "Dynamic DNS: (Error) Wrong password - Remember password is case sensitive.";
                } else if (preg_match('/Domæne kan IKKE administreres af bruger/i', $data)) {
                        $status = "Dynamic DNS: (Error) User unable to administer the selected domain.";
                } else if (preg_match('/OK/i', $data)) {
                        $status = "Dynamic DNS: (Success) IP Address Updated Successfully!";
                        $successful_update = true;
                } else {
                        $status = "Dynamic DNS: (Unknown Response)";
                        log_error("Dynamic DNS: PAYLOAD: {$data}");
                        $this->_debug($data);
                }
                break;
            case 'duckdns':
                if (preg_match('/OK/i', $data)) {
                        $status = "Dynamic DNS: (Success) IP Address Updated Successfully!";
                        $successful_update = true;
                } else {
                        $status = "Dynamic DNS: (Unknown Response)";
                        log_error("Dynamic DNS: PAYLOAD: {$data}");
                        $this->_debug($data);
                }
                break;
            case 'googledomains':
                if (preg_match('/notfqdn/i', $data)) {
                    $status = "Dynamic DNS: (Error) Not a FQDN";
                } else if (preg_match('/nochg/i', $data)) {
                    $status = "Dynamic DNS: (Success) No change in IP address";
                    $successful_update = true;
                } else if (preg_match('/good/i', $data)) {
                    $status = "Dynamic DNS: (Success) IP address updated successfully";
                    $successful_update = true;
                } else if (preg_match('/badauth/i', $data)) {
                    $status = "Dynamic DNS: (Error) Authentication failed";
                } else if (preg_match('/nohost/i', $data)) {
                    $status = "Dynamic DNS: (Error) Hostname does not exist or does not have dynamic DNS enabled";
                } else if (preg_match('/badagent/i', $data)) {
                    $status = "Dynamic DNS: (Error) Bad request";
                } else if (preg_match('/abuse/i', $data)) {
                    $status = "Dynamic DNS: (Error) Access has been blocked for abuse";
                } else if (preg_match('/911/i', $data)) {
                    $status = "Dynamic DNS: (Error) Server-side error or maintenance";
                } else {
                    $status = "Dynamic DNS: (Unknown Response)";
                    log_error("Dynamic DNS: PAYLOAD: {$data}");
                    $this->_debug($data);
                }
        }

        if($successful_update == true) {
            /* Write WAN IP to cache file */
            $wan_ip = $this->_checkIP();
            if ($this->_useIPv6 == false && $wan_ip > 0) {
                $currentTime = time();
                notify_all_remote(sprintf(gettext("Dynamic DNS updated IP Address on %s (%s) to %s"), convert_real_interface_to_friendly_descr($this->_if), $this->_if, $wan_ip));
                log_error("Dynamic DNS: updating cache file {$this->_cacheFile}: {$wan_ip}");
                @file_put_contents($this->_cacheFile, "{$wan_ip}|{$currentTime}");
            } else
                @unlink($this->_cacheFile);
            if ($this->_useIPv6 == true && $wan_ip > 0) {
                $currentTime = time();
                notify_all_remote(sprintf(gettext("Dynamic DNS updated IPv6 Address on %s (%s) to %s"), convert_real_interface_to_friendly_descr($this->_if), $this->_if, $wan_ip));
                log_error("Dynamic DNS: updating cache file {$this->_cacheFile_v6}: {$wan_ip}");
                @file_put_contents($this->_cacheFile_v6, "{$wan_ip}|{$currentTime}");
            } else
                @unlink($this->_cacheFile_v6);
        }
        $this->status = $status;
        log_error($status);
    }

    /*
     * Private Function (added 12 July 05) [beta]
     *   Return Error, Set Last Error, and Die.
     */
    function _error($errorNumber = '1') {
        switch ($errorNumber) {
            case 0:
                break;
            case 2:
                $error = 'Dynamic DNS: (ERROR!) No Dynamic DNS Service provider was selected.';
                break;
            case 3:
                $error = 'Dynamic DNS: (ERROR!) No Username Provided.';
                break;
            case 4:
                $error = 'Dynamic DNS: (ERROR!) No Password Provided.';
                break;
            case 5:
                $error = 'Dynamic DNS: (ERROR!) No Hostname Provided.';
                break;
            case 6:
                $error = 'Dynamic DNS: (ERROR!) The Dynamic DNS Service provided is not yet supported.';
                break;
            case 7:
                $error = 'Dynamic DNS: (ERROR!) No Update URL Provided.';
                break;
            case 8:
                $status = "Route 53: (Error) Invalid ZoneID";
                break;
            case 9:
                $status = "Route 53: (Error) Invalid TTL";
                break;
            case 10:
                $error = "Dynamic DNS ({$this->_dnsHost}): No change in my IP address and/or " . $this->_dnsMaxCacheAgeDays . " days has not passed. Not updating dynamic DNS entry.";
                break;
            default:
                $error = "Dynamic DNS: (ERROR!) Unknown Response.";
                /* FIXME: $data isn't in scope here */
                /* $this->_debug($data); */
                break;
        }
        $this->lastError = $error;
        log_error($error);
    }

    /*
     * Private Function (added 12 July 05) [beta]
     *   - Detect whether or not IP needs to be updated.
     *      | Written Specifically for pfSense (https://www.pfsense.org) may
     *      | work with other systems. pfSense base is FreeBSD.
     */
    function _detectChange() {
        $currentTime = time();

        $wan_ip = $this->_checkIP();
        if ($wan_ip == 0) {
            log_error("Dynamic DNS ({$this->_dnsHost}): Current WAN IP could not be determined, skipping update process.");
            return false;
        }
        $log_error = "Dynamic DNS ({$this->_dnsHost}): Current WAN IP: {$wan_ip} ";

        if ($this->_useIPv6 == true) {
            if (file_exists($this->_cacheFile_v6)) {
                $contents = file_get_contents($this->_cacheFile_v6);
                list($cacheIP,$cacheTime) = explode('|', $contents);
                $this->_debug($cacheIP.'/'.$cacheTime);
                $initial = false;
                $log_error .= "Cached IPv6: {$cacheIP} ";
            } else {
                $cacheIP = '::';
                @file_put_contents($this->_cacheFile, "::|{$currentTime}");
                $cacheTime = $currentTime;
                $initial = true;
                $log_error .= "No Cached IPv6 found.";
            }
        } else {
            if (file_exists($this->_cacheFile)) {
                $contents = file_get_contents($this->_cacheFile);
                list($cacheIP,$cacheTime) = explode('|', $contents);
                $this->_debug($cacheIP.'/'.$cacheTime);
                $initial = false;
                $log_error .= "Cached IP: {$cacheIP} ";
            } else {
                $cacheIP = '0.0.0.0';
                @file_put_contents($this->_cacheFile, "0.0.0.0|{$currentTime}");
                $cacheTime = $currentTime;
                $initial = true;
                $log_error .= "No Cached IP found.";
            }
        }
        if ($this->_dnsVerboseLog)
            log_error($log_error);

        // Convert seconds = days * hr/day * min/hr * sec/min
        $maxCacheAgeSecs = $this->_dnsMaxCacheAgeDays * 24 * 60 * 60;

        $needs_updating = FALSE;
        /* lets determine if the item needs updating */
        if ($cacheIP != $wan_ip) {
            $needs_updating = true;
            $update_reason = "Dynamic DNS: cacheIP != wan_ip.  Updating. ";
            $update_reason .= "Cached IP: {$cacheIP} WAN IP: {$wan_ip} ";
        }
        if (($currentTime - $cacheTime) > $maxCacheAgeSecs) {
            $needs_updating = true;
            $this->_forceUpdateNeeded = true;
            $update_reason = "Dynamic DNS: More than " . $this->_dnsMaxCacheAgeDays . " days.  Updating. ";
            $update_reason .= "{$currentTime} - {$cacheTime} > {$maxCacheAgeSecs} ";
        }
        if ($initial == true) {
            $needs_updating = true;
            $update_reason .= "Initial update. ";
        }

        /*   finally if we need updating then store the
         *   new cache value and return true
         */
        if ($needs_updating == true) {
            if ($this->_dnsVerboseLog)
                log_error("Dynamic DNS ({$this->_dnsHost}): {$update_reason}");
            return true;
        }

        return false;
    }

    /*
     * Private Function (added 16 July 05) [beta]
     *   - Writes debug information to a file.
     *   - This function is only called when a unknown response
     *   - status is returned from a dynamic DNS service provider.
     */
    function _debug($data) {
        $string = date('m-d-y h:i:s').' - ('.$this->_debugID.') - ['.$this->_dnsService.'] - '.$data."\n";
        $file = fopen($this->_debugFile, 'a');
        fwrite($file, $string);
        fclose($file);
    }

    function _checkIP() {
        $ip_address = get_dyndns_ip($this->_if, $his->_useIPv6 ? 6 : 4);
        if (!is_ipaddr($ip_address)) {
            if ($this->_dnsVerboseLog) {
                log_error("Dynamic DNS ({$this->_dnsHost}): IP address could not be extracted from {$hosttocheck}");
            }

            $ip_address = 0;
        } else {
            if ($this->_dnsVerboseLog) {
                log_error("Dynamic DNS ({$this->_dnsHost}): {$ip_address} extracted from {$hosttocheck}");
            }

            $this->_dnsIP = $ip_address;
        }

        return $ip_address;
    }
}
