<?
	/*
	 * PHP.updateDNS
	 *
	 * +====================================================+
	 *  Services Supported:
	 *    - DynDns (dyndns.org)
	 *    - DHSDns (dhs.org)
	 *    - No-IP (no-ip.com)
	 *    - EasyDNS (easydns.com)
	 * +----------------------------------------------------+
	 *  Requirements:
	 *    - PHP version 4.0.2 or higher with CURL Library
	 * +----------------------------------------------------+
	 *  Public Functions
	 *    - updatedns()
	 *
	 *  Private Functions
	 *    - _update()
	 *    - _checkStatus()
	 *    - _error()
	 *    - _detectChange()
	 *    - _debug()
	 * +----------------------------------------------------+
	 *  DynDNS   - Last Tested: 12 July 2005
	 *  No-IP    - Last Tested: 12 July 2005
	 *  HN.org   - Last Tested: 12 July 2005
	 *  EasyDNS  - Last Tested: NEVER
	 *  DHS      - Last Tested: 12 July 2005
	 *  ZoneEdit - Last Tested: NEVER
	 *  Dyns     - Last Tested: NEVER
	 * +====================================================+
	 *
	 * @author 		E.Kristensen
	 * @link    	http://www.idylldesigns.com/projects/phpdns/
	 * @version 	0.5
	 * @updated		16 July 05 at 17:59:12 GMT
	 *
	 */

	class updatedns {
		var $_changeFile = '/var/etc/dyndns.cache';
		var $_debugFile = '/var/etc/dyndns.debug';
		var $_UserAgent = 'User-Agent: phpDynDNS/0.4';
		var $_errorVerbosity = 0;
		var $_dnsService;
		var $_dnsUser;
		var $_dnsPass;
		var $_dnsHost;
		var $_dnsIP;
		var $_dnsWildcard;
		var $_dnsMX;
		var $status;

		/* 
		 * Public Constructor Function (added 12 July 05) [beta]
		 *   - Gets the dice rolling for the update. 
		 */
		function updatedns ($dnsService = '', $dnsHost = '', $dnsUser = '', $dnsPass = '', $dnsWildcard = '', $dnsMX = '') {
			if (!$dnsService) $this->_error(2);
			if (!$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->_dnsIP = $dnsIP;

			$change = $this->_detectChange();
			if (!$change) $this->_error(10);

			if ($this->_dnsService == 'dyndns' ||
				$this->_dnsService == 'dhs' ||
				$this->_dnsService == 'noip' ||
				$this->_dnsService == 'easydns' ||
				$this->_dnsService == 'hn' ||
				$this->_dnsService == 'zoneedit' ||
				$this->_dnsService == 'dyns')
			{
				$this->_update();
			} else {
				$this->_error(6);
			}
		}


		/*
		 * Private Function (added 12 July 05) [beta]
		 *   Send Update To Selected Service.
		 */
		function _update() {
			$ch = curl_init();
			curl_setopt($ch, CURLOPT_HEADER, 0);
			curl_setopt($ch, CURLOPT_USERAGENT, $this->_UserAgent);
			curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);

			switch ($this->_dnsService) {
				case 'dyndns':
					$needsIP = FALSE;
					curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
					curl_setopt($ch, CURLOPT_USERPWD, $this->_dnsUser.':'.$this->_dnsPass);
					curl_setopt($ch, CURLOPT_URL, 'https://members.dyndns.org/nic/update?hostname='.$this->_dnsHost);
					$data = curl_exec($ch);
					curl_close($ch);
					$this->_checkStatus($data);
					break;
				case 'dhs':
					$needsIP = TRUE;
					curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
					curl_setopt($ch, CURLOPT_URL, 'https://members.dhs.org/nic/hosts');
					curl_setopt($ch, CURLOPT_USERPWD, $this->_dnsUser.':'.$this->_dnsPass);
					curl_setopt($ch, CURLOPT_POSTFIELDS, $post_data);
					$data = curl_exec($ch);
					curl_close($ch);
					$this->_checkStatus($data);
					break;
				case 'noip':
					$needsIP = TRUE;
					curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
					curl_setopt($ch, CURLOPT_URL, 'http://dynupdate.no-ip.com/dns?username='.$this->_dnsUser.'&password='.$this->_dnsPass.'&hostname='.$this->_dnsHost.'&ip='.$this->_dnsIP);
					$data = curl_exec($ch);
					curl_close($ch);
					$this->_checkStatus($data);
					break;
				case 'easydns':
					$needsIP = TRUE;
					curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
					curl_setopt($ch, CURLOPT_USERPWD, $this->_dnsUser.':'.$this->_dnsPass);
					curl_setopt($ch, CURLOPT_URL, 'http://members.easydns.com/dyn/dyndns.php?hostname='.$this->_dnsHost.'&myip='.$this->_dnsIP);
					$data = curl_exec($ch);
					curl_close($ch);
					$this->_checkStatus($data);
					break;
				case 'hn':
					$needsIP = TRUE;
					curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
					curl_setopt($ch, CURLOPT_USERPWD, $this->_dnsUser.':'.$this->_dnsPass);
					curl_setopt($ch, CURLOPT_URL, 'http://dup.hn.org/vanity/update?ver=1&IP='.$this->_dnsIP);
					$data = curl_exec($ch);
					curl_close($ch);
					$this->_checkStatus($data);
					break;
				case 'zoneedit':
					$needsIP = FALSE;
					curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
					curl_setopt($ch, CURLOPT_URL, 'https://dynamic.zoneedit.com/auth/dynamic.html?host='.$this->_dnsHost.'&dnsto='.$this->_dnsIP);
					$data = curl_exec($ch);
					curl_close($ch);
					$this->_checkStatus($data);
					break;
				case 'dyns';
					$needsIP = FALSE;
					curl_setopt($ch, CURLOPT_URL, 'http://www.dyns.cx/postscript011.php?username='.$this->_dnsUser.'&password='.$this->_dnsPass.'&host='.$this->_dnsHost);
					$data = curl_exec($ch);
					curl_close($ch);
					$this->_checkStatus($data);
					break;
				default:
					break;
			}
		}


		/*
		 * Private Function (added 12 July 2005) [beta]
		 *   Retrieve Update Status
		 */
		function _checkStatus($data) {
			switch ($this->_dnsService) {
				case 'dyndns':
					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";
					} else if (preg_match('/good/i', $data)) {
						$status = "phpDynDNS: (Success) IP Address Changed Successfully!";
					} else if (preg_match('/noauth/i', $data)) {
						$status = "phpDynDNS: (Error) User Authorization Failed";
					} else {
						$status = "phpDynDNS: (Unknown Response)";
						$this->_debug($data);
					}
					break;
				case 'dhs':
					break;
				case 'noip':
					list($ip,$code) = split(":",$data);
					switch ($code) {
						case 0:
							$status = "phpDynDNS: (Success) IP address is current, no update performed.";
							break;
						case 1:
							$status = "phpDynDNS: (Success) DNS hostname update successful.";
							break;
						case 2:
							$status = "phpDynDNS: (Error) Hostname supplied does not exist.";
							break;
						case 3:
							$status = "phpDynDNS: (Error) Invalid Username.";
							break;
						case 4:
							$status = "phpDynDNS: (Error) Invalid Password.";
							break;
						case 5:
							$status = "phpDynDNS: (Error) To many updates sent.";
							break;
						case 6:
							$status = "phpDynDNS: (Error) Account disabled due to violation of No-IP terms of service.";
							break;
						case 7:
							$status = "phpDynDNS: (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: (Error) Disabled / Locked Hostname.";
							break;
						case 9:
							$status = "phpDynDNS: (Error) Host updated is configured as a web redirect and no update was performed.";
							break;
						case 10:
							$status = "phpDynDNS: (Error) Group supplied does not exist.";
							break;
						case 11:
							$status = "phpDynDNS: (Success) DNS group update is successful.";
							break;
						case 12:
							$status = "phpDynDNS: (Success) DNS group is current, no update performed.";
							break;
						case 13:
							$status = "phpDynDNS: (Error) Update client support not available for supplied hostname or group.";
							break;
						case 14:
							$status = "phpDynDNS: (Error) Hostname supplied does not have offline settings configured.";
							break;
						case 99:
							$status = "phpDynDNS: (Error) Client disabled. Client should exit and not perform any more updates without user intervention.";
							break;
						case 100:
							$status = "phpDynDNS: (Error) Client disabled. Client should exit and not perform any more updates without user intervention.";
							break;
						default:
							$status = "phpDynDNS: (Unknown Response)";
							$this->_debug($data);
							break;
					}
					break;
				case 'easydns':
					if (preg_match('/NOACCESS/i', $data)) {
						$status = "phpDynDNS: (Error) Authentication Failed: Username and/or Password was Incorrect.";
					} else if (preg_match('/NOSERVICE/i', $data)) {
						$status = "phpDynDNS: (Error) No Service: Dynamic DNS Service has been disabled for this domain.";
					} else if (preg_match('/ILLEGAL INPUT/i', $data)) {
						$status = "phpDynDNS: (Error) Illegal Input: Self-Explantory";
					} else if (preg_match('/TOOSOON/i', $data)) {
						$status = "phpDynDNS: (Error) Too Soon: Not Enough Time Has Elapsed Since Last Update";
					} else if (preg_match('/NOERROR/i', $data)) {
						$status = "phpDynDNS: (Success) IP Updated Successfully!";					
					} else {
						$status = "phpDynDNS: (Unknown Response)";
						$this->_debug($data);
					}
					break;
				case 'hn':
					break;
				case 'zoneedit':
					if (preg_match('/{700,799}/i', $data)) {
						$status = "phpDynDNS: (Error) Update Failed!";
					} else if (preg_match('/{200,201}/i', $data)) {
						$status = "phpDynDNS: (Success) IP Address Updated Successfully!";
					} else {
						$status = "phpDynDNS: (Unknown Response)";
						$this->_debug($data);
					}
					break;
				case 'dyns':
					if (preg_match("/400/i", $data)) {
						$status = "phpDynDNS: (Error) Bad Request - The URL was malformed. Required parameters were not provided.";
					} else if (preg_match('/402/i', $data)) {
						$status = "phpDynDNS: (Error) Update Too Soon - You have tried updating to quickly since last change.";
					} else if (preg_match('/403/i', $data)) {
						$status = "phpDynDNS: (Error) Database Error - There was a server-sided database error.";
					} else if (preg_match('/405/i', $data)) {
						$status = "phpDynDNS: (Error) Hostname Error - The hostname (".$this->_dnsHost.") doesn't belong to you.";
					} else if (preg_match('/200/i', $data)) {
						$status = "phpDynDNS: (Success) IP Address Updated Successfully!";
					} else {
						$status = "phpDynDNS: (Unknown Response)";
						$this->_debug($data);
					}
					break;
			}
			$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:
					$this->lastError = 'phpDynDNS: (ERROR!) No Dynamic DNS Service provider was selected.';
					if ($this->_errorVerbosity)
						print "You did not select a Dynamic DNS service!";
					break;
				case 3:
					$this->lastError = 'phpDynDNS: (ERROR!) No Username Provided.';
					if ($this->_errorVerbosity)
						print "Error! - No Username Was Provided!";
					break;
				case 4:
					$this->lastError = 'phpDynDNS: (ERROR!) No Password Provided.';
					if ($this->_errorVerbosity)
						print "Error! - No Password Was Provided!";
					break;
				case 5:
					$this->lastError = 'phpDynDNS: (ERROR!) No Hostname Provided.';
					if ($this->_errorVerbosity)
						print "Error - No Hostname Was Provided!";
					break;
				case 6:
					$this->lastError = 'phpDynDNS: (ERROR!) The Dynamic DNS Service provided is not yet supported.';
					if ($this->_errorVerbosity)
						print 'Dynamic DNS Service selected is not supported!';
					break;
				case 10:
					$this->lastError = 'phpDynDNS: (ERROR!) No Change Was Made. Not Updating Dynamic DNS Entry.';
					if ($this->_errorVerbosity)
						print 'There was no change in the WAN IP address and default timelimit has not expired. Dynamic DNS entry was not updated.';
					break;
				default:
					$this->lastError = "phpDynDNS: (ERROR!) Unknown Response.";
					$this->_debug($data);
					break;
			}
			log_error($this->lasterror);
		}


		/*
		 * 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() {
			$currentTime = time();

			$wan_if = get_real_wan_interface();
			$wan_ip = find_interface_ip($wan_if);
			$this->_dnsIP = $wan_ip;

			if (file_exists($this->_changeFile)) {
				$file = fopen($this->_changeFile, 'r');
				$contents = fread($file, filesize($this->_changeFile));
				fclose($file);
				list($cacheIP,$cacheTime) = split(':', $contents);
			}

			switch ($this->_dnsService) {
				case 'dyndns':
					$time = '2419200';
					break;
				case 'dhs':
					$time = '2419200';
					break;
				case 'easydns':
					$time = '2419200';
					break;
				case 'noip':
					$time = '2419200';
					break;
				case 'hn':
					$time = '2419200';
					break;
				case 'zoneedit':
					$time = '2419200';
					break;
				case 'dyns':
					$time = '2419200';
					break;
			}

			/* If IP addresses are different or 28 days have passed update record */
			if ( ($cacheIP != $wan_ip) || ( ($currentTime - $cacheTime) > $time ) ) {
				/* Write WAN IP to cache file */
				$file = fopen($this->_changeFile, 'w');
				fwrite($file, $wan_ip.':'.$currentTime);
				fclose($file);

				return TRUE;
			} else {
				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) {
			$string = date('m-d-y h:i:s').' - ['.$this->_dnsService.'] - '.$data;
			$file = fopen($this->_debugFile, 'a');
			fwrite($file, $string);
			fclose($file);
		}

	}

?>