dyndns mit Hostsharing

dyndns.php

<?php

// zum Aktualisieren der IP Adresse: https://dyndns.example.org/dyndns.php?domain=meinedynamische.example.org

if (!isset($_GET['domain'])) {
	die('Die Angabe der Domain fehlt.');
}
$domain = $_GET['domain'];

$filename = "/home/pacs/xyz00/users/dyndns/doms/example.org/etc/pri.example.org";

$current = file_get_contents($filename);

if (strpos($current, $domain) === false) die("<br/><br/>Fehler: Unbekannte Domain $domain");

function resolve_hostname($domain) {
	// see http://www.purplepixie.org/phpdns/ for instructions and download of phpdns
	require("phpdns-1.05/dns.inc.php"); // Require API Source
	$dns_server="dns1.hostsharing.net"; // Our DNS Server
	$dns_query=new DNSQuery($dns_server); // create DNS Query object - there are other options we could pass here

	$question=$domain; // the question we will ask
	$type="A"; // the type of response(s) we want for this question

	$result=$dns_query->Query($question,$type); // do the query

	// Trap Errors
	if ( ($result===false) || ($dns_query->error!=0) ) // error occured
	{
		echo $dns_query->lasterror;
		die();
	}

	//Process Results
	$result_count=$result->count; // number of results returned

	for ($a=0; $a<$result_count; $a++)
	{
		if ($result->results[$a]->typeid=="A") // only after A records
		{
			//echo $question." has IP address ".$result->results[$a]->data."<br>";
			return $result->results[$a]->data;
		}
  	}

	$type = "AAAA";
	$result=$dns_query->Query($question,$type); // do the query

	// Trap Errors
	if ( ($result===false) || ($dns_query->error!=0) ) // error occured
	{
		echo $dns_query->lasterror;
		die();
	}

	//Process Results
	$result_count=$result->count; // number of results returned

	for ($a=0; $a<$result_count; $a++)
	{
		if ($result->results[$a]->typeid=="AAAA") // only after AAAA records
		{
			//echo $question." has IP address ".$result->results[$a]->data."<br>";
			return $result->results[$a]->data;
		}
	}


	die("invalid response from dns query");
}

$current_ip = gethostbyname($domain);
$current_ip = resolve_hostname($domain);

$ip = $_SERVER['REMOTE_ADDR'];
if(filter_var($ip, FILTER_VALIDATE_IP, FILTER_FLAG_IPV4)) {
	echo "Deine IPv4 Adresse: ".$ip."<br/>";
	$A = 'A';
}
if(filter_var($ip, FILTER_VALIDATE_IP, FILTER_FLAG_IPV6)) {
	echo "Deine IPv6 Adresse: ".$ip."<br/>";
	$A = 'AAAA';
}
echo "Momentan ist eingestellt: IP Adresse für ".$domain.": ".$current_ip."<br/>";
echo "Falls die IP Adressen noch nicht übereinstimmen, bitte ein paar Minuten warten, und diese Seite neu laden, um es zu kontrollieren.<br/>";


$content = explode("\n", $current);
$output = '';
foreach ($content as $line)
{
	if (strpos($line, $domain) !== false) {
		$output .= $domain.".	  IN  $A	 ".$_SERVER['REMOTE_ADDR']."\n";
	} else {
		$output .= $line."\n";
	}
}
if (trim($current) != trim($output)) {
	echo "<br/><br/>DNS wurde aktualisiert, bitte noch ein paar Minuten warten!";
	file_put_contents($filename, $output);
}
?>