check_dns.php

<?php
/*
 * Check that all appropriate calls for name resolution work under the chroot.
*/

$domain="www.echothrust.com";
$inaddr="172.20.3.1";
// If we run from the CLI we're fine
if(is_array($argv) && count($argv)>1)
{
	$domain=$argv[1];
	if (count($argv)>2) $inaddr=$argv[2];
}
// Set proper encoding so that the format is clean
if(isset($_GET) && is_array($_GET))
	header("Content-Type: text/plain");

// if we run from within fpm
if(isset($_GET['domain']) && !empty($_GET['domain']))
	$domain=$_GET['domain'];

if(isset($_GET['inaddr']) && !empty($_GET['inaddr']))
	$inaddr=$_GET['inaddr'];


check_call("gethostbyaddr",$inaddr);
check_call("gethostbyname","$domain");
check_call("checkdnsrr",$domain);
check_call("checkdnsrr",$domain,"A");
check_call("checkdnsrr",$domain,"NS");
check_call("checkdnsrr",$domain,"TXT");
check_call("checkdnsrr",$domain,"MX");
check_call("checkdnsrr",$domain,"ANY");
check_call("dns_get_record",$domain);

/**
 * Check the return of a call and log output for debuging
 * @param string $func the function to call
 * @param mixed $param1 the first parameter of the call
 * @param mixed $param2 the second parameter of the call if any
 */
function check_call($func,$param1=null,$param2=null)
{
	echo "checking $func with [param1=$param1] and [param2=$param2] => ";
	if($param2==null)
		$ret=call_user_func($func,$param1);
	else
		$ret=call_user_func($func,$param1,$param2);

	if($ret!==false) {
		echo "true ", is_bool($ret) ? "\n" : var_dump($ret);
	}
	else
		echo "false\n";

}