<?php
	/*
	 * PHP.updateDNS (pfSense 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 Tunnelbroker IP update (ipv4.tunnelbroker.net)
	 *    - SelfHost (selfhost.de)
	 *    - Amazon Route 53 (aws.amazon.com)
	 *    - DNS-O-Matic (dnsomatic.com)
	 *    - Custom DDNS (any URL)
	 * +----------------------------------------------------+
	 *  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: NEVER
	 *  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
	 * +====================================================+
	 *
	 * @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 $_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;
		
		/* 
		 * 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 = '') {
			
			global $config, $g;
			
			$this->_cacheFile = "{$g['conf_path']}/dyndns_{$dnsIf}{$dnsService}" . escapeshellarg($dnsHost) . "{$dnsID}.cache";
			$this->_debugFile = "{$g['varetc_path']}/dyndns_{$dnsIf}{$dnsService}" . escapeshellarg($dnsHost) . "{$dnsID}.debug";

			log_error("DynDns: 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) $this->_error(7);
				break;
			default:
				if (!$dnsUser) $this->_error(3);
				if (!$dnsPass) $this->_error(4);
				if (!$dnsHost) $this->_error(5);
			}
			
			$this->_dnsService = strtolower($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);
			log_error("DynDNS ({$this->_dnsHost}): running get_failover_interface for {$dnsRequestIf}. found {$this->_dnsRequestIf}");
			$this->_dnsRequestIfIP = get_interface_ip($dnsRequestIf);

			// Ensure that we where able to lookup the IP
			if(!is_ipaddr($this->_dnsIP)) {
				log_error("DynDNS ({$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 'easydns':
				case 'hn':
				case 'zoneedit':
				case 'dyns':
				case 'ods':
				case 'freedns':
				case 'loopia':
				case 'staticcling':
				case 'dnsexit':
				case 'custom':
				case 'opendns':
				case 'namecheap':
				case 'he-net':
				case 'selfhost':
				case 'he-net-tunnelbroker':
				case 'route53':
					$this->_update();	
					break;
				default:
					$this->_error(6);
					break;
				}
			}

			unlock($dyndnslck);
		}
			
		/*
		 * Private Function (added 12 July 05) [beta]
		 *   Send Update To Selected Service.
		 */
		function _update() {
		
			log_error("DynDNS ({$this->_dnsHost}): DynDns _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':
					$needsIP = FALSE;
					//log_error("DynDNS ({$this->_dnsHost}) DynDns _update() starting. Dynamic");
					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':
					$needsIP = TRUE;
					$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':
					$needsIP = TRUE;
					curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
					$server = "http://dynupdate.no-ip.com/ducupdate.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) . '&pass=' . urlencode($this->_dnsPass) . '&hostname=' . $this->_dnsHost.'&ip=' . $this->_dnsIP);
					break;
				case 'easydns':
					$needsIP = TRUE;
					curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
					curl_setopt($ch, CURLOPT_USERPWD, $this->_dnsUser.':'.$this->_dnsPass);
					$server = "http://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':
					$needsIP = TRUE;
					curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
					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':
					$needsIP = FALSE;
					curl_setopt($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':
					$needsIP = FALSE;
					$server = "http://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':
					$needsIP = FALSE;
					$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':
					$needIP = FALSE;
					curl_setopt($ch, CURLOPT_URL, 'http://freedns.afraid.org/dynamic/update.php?' . $this->_dnsPass);
					break;
				case 'dnsexit':
					$needsIP = TRUE;
					curl_setopt($ch, CURLOPT_URL, 'http://www.dnsexit.com/RemoteUpdate.sv?login='.$this->_dnsUser. '&password='.$this->_dnsPass.'&host='.$this->_dnsHost.'&myip='.$this->_dnsIP);
					break;
				case 'loopia':
					$needsIP = TRUE;
					curl_setopt($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':
					$needsIP = FALSE;
					if (isset($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://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':
					$needsIP = FALSE;
					curl_setopt($ch, CURLOPT_URL, 'http://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
					*/
					$needsIP = FALSE;
					log_error("DNS-O-Matic: DNS update() starting.");
					if (isset($this->_dnsWildcard) && $this->_dnsWildcard != "OFF") $this->_dnsWildcard = "ON";
					curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
					curl_setopt($ch, CURLOPT_USERPWD, $this->_dnsUser.':'.$this->_dnsPass);
					$server = "https://" . $this->_dnsUser . ":" . $this->_dnsPass . "@updates.dnsomatic.com/nic/update?hostname=";
					if($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]
					*/
					$needsIP = FALSE;
					log_error("Namecheap ({$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':
					$needsIP = FALSE;
					log_error("HE.net ({$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':
					$needsIP = FALSE;
					log_error("HE.net Tunnelbroker: DNS update() starting.");
					$server = "https://ipv4.tunnelbroker.net/ipv4_end.php?";
					curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
					curl_setopt($ch, CURLOPT_USERPWD, $this->_dnsUser . ':' . $this->_dnsPass);
					curl_setopt($ch, CURLOPT_URL, $server . 'tid=' . $this->_dnsHost);
					break;
				case 'selfhost':
					$needsIP = FALSE;
					//log_error("SelfHost: DNS update() starting.");
					if (isset($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://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=' . $this->_dnsMX . '&backmx=NO');
					break;
                               case 'route53':
                                        log_error("Route53 ({$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;

                                        /* Include Route 53 Library Class */
                                        require_once('/etc/inc/r53.class');

                                        /* 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) {
                                                $result = array();
                                                foreach($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 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, $result);
                                                break;
				case 'custom':
					log_error("Custom DDNS ({$this->_dnsHost}): DNS update() starting.");
					if (strstr($this->dnsUpdateURL, "%IP%")) {$needsIP = TRUE;} else {$needsIP = FALSE;}
					if ($this->_dnsUser != '') {
						curl_setopt($ch, CURLOPT_HTTPAUTH, CURLAUTH_ANY); 
						curl_setopt($ch, CURLOPT_USERPWD, "{$this->_dnsUser}:{$this->_dnsPass}");
					}
					$server = str_replace("%IP%", $this->_dnsIP, $this->_dnsUpdateURL);
					log_error("Sending request to: ".$server);
					curl_setopt($ch, CURLOPT_URL, $server);
					break;
				default:
					break;
			}
			if ($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, $data) {
			log_error("DynDNS ({$this->_dnsHost}): DynDns _checkStatus() starting.");
			log_error("DynDNS ({$this->_dnsHost}): Current Service: {$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 'dyndns':
					if (preg_match('/notfqdn/i', $data)) {
						$status = "phpDynDNS ({$this->_dnsHost}): (Error) Not A FQDN!";
					} else if (preg_match('/nochg/i', $data)) {
						$status = "phpDynDNS ({$this->_dnsHost}): (Success) No Change In IP Address";
						$successful_update = true;
					} else if (preg_match('/good/i', $data)) {
						$status = "phpDynDNS ({$this->_dnsHost}): (Success) IP Address Changed Successfully! (".$this->_dnsIP.")";
						$successful_update = true;
					} else if (preg_match('/noauth/i', $data)) {
						$status = "phpDynDNS ({$this->_dnsHost}): (Error) User Authorization Failed";
					} else {
						$status = "phpDynDNS ({$this->_dnsHost}): (Unknown Response)";
						log_error("phpDynDNS ({$this->_dnsHost}): PAYLOAD: {$data}");
						$this->_debug($data);
					}
					break;
				case 'dyndns-static':
					if (preg_match('/notfqdn/i', $data)) {
						$status = "phpDynDNS ({$this->_dnsHost}): (Error) Not A FQDN!";
					} else if (preg_match('/nochg/i', $data)) {
						$status = "phpDynDNS ({$this->_dnsHost}): (Success) No Change In IP Address";
						$successful_update = true;
					} else if (preg_match('/good/i', $data)) {
						$status = "phpDynDNS ({$this->_dnsHost}): (Success) IP Address Changed Successfully!";
						$successful_update = true;
					} else if (preg_match('/noauth/i', $data)) {
						$status = "phpDynDNS ({$this->_dnsHost}): (Error) User Authorization Failed";
					} else {
						$status = "phpDynDNS ({$this->_dnsHost}): (Unknown Response)";
						log_error("phpDynDNS ({$this->_dnsHost}): PAYLOAD: {$data}");
						$this->_debug($data);
					}
					break;
				case 'dyndns-custom':
					if (preg_match('/notfqdn/i', $data)) {
						$status = "phpDynDNS ({$this->_dnsHost}): (Error) Not A FQDN!";
					} else if (preg_match('/nochg/i', $data)) {
						$status = "phpDynDNS: (Success) No Change In IP Address";
						$successful_update = true;
					} else if (preg_match('/good/i', $data)) {
						$status = "phpDynDNS ({$this->_dnsHost}): (Success) IP Address Changed Successfully!";
						$successful_update = true;
					} else if (preg_match('/noauth/i', $data)) {
						$status = "phpDynDNS ({$this->_dnsHost}): (Error) User Authorization Failed";
					} else {
						$status = "phpDynDNS ({$this->_dnsHost}): (Unknown Response)";
						log_error("phpDynDNS ({$this->_dnsHost}): PAYLOAD: {$data}");
						$this->_debug($data);
					}
					break;
				case 'dhs':
					break;
				case 'noip':
					list($ip,$code) = explode(":",$data);
					switch ($code) {
						case 0:
							$status = "phpDynDNS ({$this->_dnsHost}): (Success) IP address is current, no update performed.";
							$successful_update = true;
							break;
						case 1:
							$status = "phpDynDNS ({$this->_dnsHost}): (Success) DNS hostname update successful.";
							$successful_update = true;
							break;
						case 2:
							$status = "phpDynDNS ({$this->_dnsHost}): (Error) Hostname supplied does not exist.";
							break;
						case 3:
							$status = "phpDynDNS ({$this->_dnsHost}): (Error) Invalid Username.";
							break;
						case 4:
							$status = "phpDynDNS ({$this->_dnsHost}): (Error) Invalid Password.";
							break;
						case 5:
							$status = "phpDynDNS ({$this->_dnsHost}): (Error) To many updates sent.";
							break;
						case 6:
							$status = "phpDynDNS ({$this->_dnsHost}): (Error) Account disabled due to violation of No-IP terms of service.";
							break;
						case 7:
							$status = "phpDynDNS ({$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:
							$status = "phpDynDNS ({$this->_dnsHost}): (Error) Disabled / Locked Hostname.";
							break;
						case 9:
							$status = "phpDynDNS ({$this->_dnsHost}): (Error) Host updated is configured as a web redirect and no update was performed.";
							break;
						case 10:
							$status = "phpDynDNS ({$this->_dnsHost}): (Error) Group supplied does not exist.";
							break;
						case 11:
							$status = "phpDynDNS ({$this->_dnsHost}): (Success) DNS group update is successful.";
							$successful_update = true;
							break;
						case 12:
							$status = "phpDynDNS ({$this->_dnsHost}): (Success) DNS group is current, no update performed.";
							$successful_update = true;
							break;
						case 13:
							$status = "phpDynDNS ({$this->_dnsHost}): (Error) Update client support not available for supplied hostname or group.";
							break;
						case 14:
							$status = "phpDynDNS ({$this->_dnsHost}): (Error) Hostname supplied does not have offline settings configured.";
							break;
						case 99:
							$status = "phpDynDNS ({$this->_dnsHost}): (Error) Client disabled. Client should exit and not perform any more updates without user intervention.";
							break;
						case 100:
							$status = "phpDynDNS ({$this->_dnsHost}): (Error) Client disabled. Client should exit and not perform any more updates without user intervention.";
							break;
						default:
							$status = "phpDynDNS ({$this->_dnsHost}): (Unknown Response)";
							$this->_debug("Unknown Response: ".$data);
							break;
					}
					break;
				case 'easydns':
					if (preg_match('/NOACCESS/i', $data)) {
						$status = "phpDynDNS ({$this->_dnsHost}): (Error) Authentication Failed: Username and/or Password was Incorrect.";
					} else if (preg_match('/NOSERVICE/i', $data)) {
						$status = "phpDynDNS ({$this->_dnsHost}): (Error) No Service: Dynamic DNS Service has been disabled for this domain.";
					} else if (preg_match('/ILLEGAL INPUT/i', $data)) {
						$status = "phpDynDNS ({$this->_dnsHost}): (Error) Illegal Input: Self-Explantory";
					} else if (preg_match('/TOOSOON/i', $data)) {
						$status = "phpDynDNS ({$this->_dnsHost}): (Error) Too Soon: Not Enough Time Has Elapsed Since Last Update";
					} else if (preg_match('/NOERROR/i', $data)) {
						$status = "phpDynDNS ({$this->_dnsHost}): (Success) IP Updated Successfully!";
						$successful_update = true;
					} else {
						$status = "phpDynDNS ({$this->_dnsHost}): (Unknown Response)";
						log_error("phpDynDNS ({$this->_dnsHost}): PAYLOAD: {$data}");
						$this->_debug($data);
					}
					break;
				case 'hn':
					/* FIXME: add checks */
					break;
				case 'zoneedit':
					if (preg_match('/799/i', $data)) {
						$status = "phpDynDNS ({$this->_dnsHost}): (Error 799) Update Failed!";				
					} else if (preg_match('/700/i', $data)) {
						$status = "phpDynDNS ({$this->_dnsHost}): (Error 700) Update Failed!";
					} else if (preg_match('/200/i', $data)) {
						$status = "phpDynDNS ({$this->_dnsHost}): (Success) IP Address Updated Successfully!";
						$successful_update = true;
					} else if (preg_match('/201/i', $data)) {
						$status = "phpDynDNS ({$this->_dnsHost}): (Success) IP Address Updated Successfully!";
						$successful_update = true;						
					} else {
						$status = "phpDynDNS ({$this->_dnsHost}): (Unknown Response)";
						log_error("phpDynDNS ({$this->_dnsHost}): PAYLOAD: {$data}");
						$this->_debug($data);
					}
					break;
				case 'dyns':
					if (preg_match("/400/i", $data)) {
						$status = "phpDynDNS ({$this->_dnsHost}): (Error) Bad Request - The URL was malformed. Required parameters were not provided.";
					} else if (preg_match('/402/i', $data)) {
						$status = "phpDynDNS ({$this->_dnsHost}): (Error) Update Too Soon - You have tried updating to quickly since last change.";
					} else if (preg_match('/403/i', $data)) {
						$status = "phpDynDNS ({$this->_dnsHost}): (Error) Database Error - There was a server-sided database error.";
					} else if (preg_match('/405/i', $data)) {
						$status = "phpDynDNS ({$this->_dnsHost}): (Error) Hostname Error - The hostname (".$this->_dnsHost.") doesn't belong to you.";
					} else if (preg_match('/200/i', $data)) {
						$status = "phpDynDNS ({$this->_dnsHost}): (Success) IP Address Updated Successfully!";
						$successful_update = true;
					} else {
						$status = "phpDynDNS ({$this->_dnsHost}): (Unknown Response)";
						log_error("phpDynDNS ({$this->_dnsHost}): PAYLOAD: {$data}");
						$this->_debug($data);
					}
					break;
				case 'ods':
					if (preg_match("/299/i", $data)) {
						$status = "phpDynDNS ({$this->_dnsHost}): (Success) IP Address Updated Successfully!";
						$successful_update = true;
					} else {
						$status = "phpDynDNS ({$this->_dnsHost}): (Unknown Response)";
						log_error("phpDynDNS ({$this->_dnsHost}): PAYLOAD: {$data}");
						$this->_debug($data);
					}
					break;
				case 'freedns':
					if (preg_match("/has not changed./i", $data)) {
						$status = "phpDynDNS ({$this->_dnsHost}): (Success) No Change In IP Address";
						$successful_update = true;
					} else if (preg_match("/Updated/i", $data)) {
						$status = "phpDynDNS ({$this->_dnsHost}): (Success) IP Address Changed Successfully!";
						$successful_update = true;
					} else {
						$status = "phpDynDNS ({$this->_dnsHost}): (Unknown Response)";
						log_error("phpDynDNS ({$this->_dnsHost}): PAYLOAD: {$data}");
						$this->_debug($data);
					} 
					break;
				case 'dnsexit':
					if (preg_match("/is the same/i", $data)) {
						$status = "phpDynDns ({$this->_dnsHost}): (Success) No Change In IP Address";
						$successful_update = true;
					} else if (preg_match("/Success/i", $data)) {
						$status = "phpDynDNS ({$this->_dnsHost}): (Success) IP Address Changed Successfully!";
						$successful_update = true;
					} else {
						$status = "phpDynDNS ({$this->_dnsHost}): (Unknown Response)";
                                                log_error("phpDynDNS ({$this->_dnsHost}): PAYLOAD: {$data}");
                                                $this->_debug($data);
					}
					break;
				case 'loopia':
					if (preg_match("/nochg/i", $data)) {
						$status = "phpDynDNS ({$this->_dnsHost}): (Success) No Change In IP Address";
						$successful_update = true;
					} else if (preg_match("/good/i", $data)) {
						$status = "phpDynDNS ({$this->_dnsHost}): (Success) IP Address Changed Successfully!";
						$successful_update = true;
					} else if (preg_match('/badauth/i', $data)) {
						$status = "phpDynDNS ({$this->_dnsHost}): (Error) User Authorization Failed";
					} else {
						$status = "phpDynDNS ({$this->_dnsHost}): (Unknown Response)";
						log_error("phpDynDNS ({$this->_dnsHost}): PAYLOAD: {$data}");
						$this->_debug($data);
					}
					break;
				case 'opendns':
					if (preg_match('/badauth/i', $data)) {
						$status = "phpDynDNS({$this->_dnsHost}): (Error) Not a valid username or password!";
					} else if (preg_match('/nohost/i', $data)) {
						$status = "phpDynDNS ({$this->_dnsHost}): (Error) Hostname you are trying to update does not exist.";
						$successful_update = true;
					} else if (preg_match('/good/i', $data)) {
						$status = "phpDynDNS ({$this->_dnsHost}): (Success) IP Address Changed Successfully! (".$this->_dnsIP.")";
						$successful_update = true;
					} else if (preg_match('/yours/i', $data)) {
						$status = "phpDynDNS ({$this->_dnsHost}): (Error) hostname specified exists, but not under the username specified.";
					} else if (preg_match('/abuse/i', $data)) {
						$status = "phpDynDns ({$this->_dnsHost}): (Error) Updating too frequently, considered abuse.";
					} else {
						$status = "phpDynDNS ({$this->_dnsHost}): (Unknown Response)";
						log_error("phpDynDNS ({$this->_dnsHost}): PAYLOAD: {$data}");
						$this->_debug($data);
					}
					break;
				case 'staticcling':
					if (preg_match("/invalid ip/i", $data)) {
					        $status = "phpDynDNS ({$this->_dnsHost}): (Error) Bad Request - The IP provided was invalid.";
					} else if (preg_match('/required info missing/i', $data)) {
					        $status = "phpDynDNS ({$this->_dnsHost}): (Error) Bad Request - Required parameters were not provided.";
					} else if (preg_match('/invalid characters/i', $data)) {
					        $status = "phpDynDNS ({$this->_dnsHost}): (Error) Bad Request - Illegal characters in either the username or the password.";
					} else if (preg_match('/bad password/i', $data)) {
					        $status = "phpDynDNS ({$this->_dnsHost}): (Error) Invalid password.";
					} else if (preg_match('/account locked/i', $data)) {
					        $status = "phpDynDNS ({$this->_dnsHost}): (Error) This account has been administratively locked.";
					} else if (preg_match('/update too frequent/i', $data)) {
					        $status = "phpDynDNS ({$this->_dnsHost}): (Error) Updating too frequently.";
					} else if (preg_match('/DB error/i', $data)) {
					        $status = "phpDynDNS ({$this->_dnsHost}): (Error) Server side error.";
					} else if (preg_match('/success/i', $data)) {
					        $status = "phpDynDNS ({$this->_dnsHost}): (Success) IP Address Updated Successfully!";
					        $successful_update = true;
					} else {
					        $status = "phpDynDNS ({$this->_dnsHost}): (Unknown Response)";
					        log_error("phpDynDNS ({$this->_dnsHost}): PAYLOAD: {$data}");
					        $this->_debug($data);
					}
					break;
				case 'namecheap':
					$tmp = str_replace("^M", "", $data);
					$ncresponse = @xml2array($tmp);
					if (preg_match("/internal server error/i", $data)) {
						$status = "phpDynDNS: (Error) Server side error.";
					} else if (preg_match("/request is badly formed/i", $data)) {
						$status = "phpDynDNS: (Error) Badly Formed Request (check your settings).";
					} else if ($ncresponse['interface-response']['ErrCount'] === "0") {
						$status = "phpDynDNS: (Success) IP Address Updated Successfully!";
						$successful_update = true;
					} else if (is_numeric($ncresponse['interface-response']['ErrCount']) && ($ncresponse['interface-response']['ErrCount'] > 0)) {
						$status = "phpDynDNS: (Error) " . implode(", ", $ncresponse["interface-response"]["errors"]);
						$successful_update = true;
					} else {
						$status = "phpDynDNS: (Unknown Response)";
						log_error("phpDynDNS: PAYLOAD: {$data}");
						$this->_debug($data);
					}
					break;
					
				case 'he-net':
					if (preg_match("/badip/i", $data)) {
					        $status = "phpDynDNS: (Error) Bad Request - The IP provided was invalid.";
					} else if (preg_match('/nohost/i', $data)) {
					        $status = "phpDynDNS: (Error) Bad Request - A hostname was not provided.";
					} else if (preg_match('/badauth/i', $data)) {
					        $status = "phpDynDNS: (Error) Invalid username or password.";
					} else if (preg_match('/good/i', $data)) {
					        $status = "phpDynDNS: (Success) IP Address Updated Successfully!";
					        $successful_update = true;
					} else if (preg_match('/nochg/i', $data)) {
							$status = "phpDynDNS: (Success) No Change In IP Address.";
							$successful_update = true;
					} else {
					        $status = "phpDynDNS: (Unknown Response)";
					        log_error("phpDynDNS: PAYLOAD: {$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 = "phpDynDNS: (Error) Bad Request - Missing/Invalid Parameters.";
					} else if (preg_match('/Tunnel not found/i', $data)) {
					        $status = "phpDynDNS: (Error) Bad Request - Invalid Tunnel ID.";
					} else if (preg_match('/Invalid API key or password/i', $data)) {
					        $status = "phpDynDNS: (Error) Invalid username or password.";
					} else if (preg_match('/OK:/i', $data)) {
					        $status = "phpDynDNS: (Success) IP Address Updated Successfully!";
					        $successful_update = true;
					} else if (preg_match('/This tunnel is already associated with this IP address/i', $data)) {
							$status = "phpDynDNS: (Success) No Change In IP Address.";
							$successful_update = true;
					} else {
					        $status = "phpDynDNS: (Unknown Response)";
					        log_error("phpDynDNS: PAYLOAD: {$data}");
					        $this->_debug($data);
					}
					break;
				case 'selfhost':
					if (preg_match('/notfqdn/i', $data)) {
						$status = "phpDynDNS: (Error) Not A FQDN!";
					} else if (preg_match('/nochg/i', $data)) {
						$status = "phpDynDNS: (Success) No Change In IP Address";
						$successful_update = true;
					} else if (preg_match('/good/i', $data)) {
						$status = "phpDynDNS: (Success) IP Address Changed Successfully! (".$this->_dnsIP.")";
						$successful_update = true;
					} else if (preg_match('/noauth/i', $data)) {
						$status = "phpDynDNS: (Error) User Authorization Failed";
					} else {
						$status = "phpDynDNS: (Unknown Response)";
						log_error("phpDynDNS: PAYLOAD: {$data}");
						$this->_debug($data);
					}
					break;
                                case 'route53':
                                        $successful_update = true;
                                        break;
				case 'custom':
					$successful_update = false;
					if ($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 = "phpDynDNS: (Success) IP Address Updated Successfully!";
					else
					        $status = "phpDynDNS: (Error) Result did not match.";
					break;
			}
			
			if($successful_update == true) {
				/* Write WAN IP to cache file */
				$wan_ip = $this->_checkIP();
				conf_mount_rw();
				if ($wan_ip > 0) {
					$currentTime = time();
					notify_all_remote(sprintf(gettext("DynDNS updated IP Address on %s (%s) to %s"), convert_real_interface_to_friendly_descr($this->_if), $this->_if, $wan_ip));
					log_error("phpDynDNS: updating cache file {$this->_cacheFile}: {$wan_ip}");
					@file_put_contents($this->_cacheFile, "{$wan_ip}:{$currentTime}");
				} else
					@unlink($this->_cacheFile);
				conf_mount_ro();
			}
			$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 = 'phpDynDNS: (ERROR!) No Dynamic DNS Service provider was selected.';
					break;
				case 3:
					$error = 'phpDynDNS: (ERROR!) No Username Provided.';
					break;
				case 4:
					$error = 'phpDynDNS: (ERROR!) No Password Provided.';
					break;
				case 5:
					$error = 'phpDynDNS: (ERROR!) No Hostname Provided.';
					break;
				case 6:
					$error = 'phpDynDNS: (ERROR!) The Dynamic DNS Service provided is not yet supported.';
					break;
				case 7:
					$error = 'phpDynDNS: (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 = 'phpDynDNS: No change in my IP address and/or 25 days has not passed. Not updating dynamic DNS entry.';
					break;
				default:
					$error = "phpDynDNS: (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 (pfsense.com) may
		 *      | work with other systems. pfSense base is FreeBSD.
		 */
		function _detectChange() {
			global $debug;

			if ($debug)
				log_error("DynDns ({$this->_dnsHost}): _detectChange() starting.");
		
			$currentTime = time();

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

			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 {
				conf_mount_rw();
				$cacheIP = '0.0.0.0';
				@file_put_contents($this->_cacheFile, "0.0.0.0:{$currentTime}");
				conf_mount_ro();
				$cacheTime = $currentTime;
				$initial = true;
				$log_error .= "No Cached IP found.";
			}
			log_error($log_error);

			/*   use 2419200 for dyndns, dhs, easydns, noip, hn
			 *   zoneedit, dyns, ods
			 */
			$time = '2160000';

			$needs_updating = FALSE;
			/* lets determine if the item needs updating */
			if ($cacheIP != $wan_ip) {
				$needs_updating = true;
				$update_reason = "DynDns: cacheIP != wan_ip.  Updating. ";
				$update_reason .= "Cached IP: {$cacheIP} WAN IP: {$wan_ip} ";
			}
			if (($currentTime - $cacheTime) > $time ) {
				$needs_updating = true;
				$update_reason = "DynDns: More than 25 days.  Updating. ";
				$update_reason .= "{$currentTime} - {$cacheTime} > {$time} ";
			}
			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 ($needs_updating == true) {
				log_error("DynDns debug information ({$this->_dnsHost}): {$update_reason}");
				return true;
			}

			return false;			
		}

		/*
		 * Private Funcation (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 DynDNS service provider.
		 */
		function _debug($data) {
			global $g;

			if (!$g['debug'])
				return;
			$string = '\n'.date('m-d-y h:i:s').' - ('.$this->_debugID.') - ['.$this->_dnsService.'] - '.$data.'\n';
			conf_mount_rw();
			$file = fopen($this->_debugFile, 'a');
			fwrite($file, $string);
			fclose($file);
			conf_mount_ro();
		}
		function _checkIP() {
			global $debug;

			if ($debug)
				log_error("DynDns ({$this->_dnsHost}): _checkIP() starting.");

			$ip_address = find_interface_ip($this->_if);
			if (!is_ipaddr($ip_address))
				return 0;
			if (is_private_ip($ip_address)) {
				$hosttocheck = "checkip.dyndns.org";
				$try = 0;
				while ($try < 3) {
					$checkip = gethostbyname($hosttocheck);
					if (is_ipaddr($checkip))
						break;
					$try++;
				}
				if ($try >= 3) {
					log_error("Dyndns debug information ({$this->_dnsHost}): Could not resolve {$hosttocheck} to ip using interface ip {$ip_address}.");
					return 0;
				}
				$ip_ch = curl_init("http://{$checkip}");
				curl_setopt($ip_ch, CURLOPT_RETURNTRANSFER, 1);
				curl_setopt($ip_ch, CURLOPT_SSL_VERIFYPEER, FALSE);
				curl_setopt($ip_ch, CURLOPT_INTERFACE, $ip_address);
				curl_setopt($ip_ch, CURLOPT_CONNECTTIMEOUT, '30');
				curl_setopt($ip_ch, CURLOPT_TIMEOUT, 120);
				$ip_result_page = curl_exec($ip_ch);
				curl_close($ip_ch);
				$ip_result_decoded = urldecode($ip_result_page);
				preg_match('/Current IP Address: (.*)<\/body>/', $ip_result_decoded, $matches);
				$ip_address = trim($matches[1]);
				if (is_ipaddr($ip_address))
					log_error("DynDns debug information ({$this->_dnsHost}): {$ip_address} extracted from {$hosttocheck}");
				else {
					log_error("DynDns debug information ({$this->_dnsHost}): IP address could not be extracted from {$hosttocheck}");
					return 0;
				}
			} else
				log_error("DynDns debug information ({$this->_dnsHost}): {$ip_address} extracted from local system.");

			$this->_dnsIP = $ip_address;

			return $ip_address;
		}

	}

?>