inc/dns.inc.php
author rejo
Fri, 28 Mar 2008 21:57:43 +0000
changeset 107 fee925b9bdef
parent 97 090be08858db
child 119 f74e4f88b680
permissions -rwxr-xr-x
[feladat @ 207] Bugfix. The letters shown just above the list of zones was showing clickable letters, even if there were no zones starting with such a letter.
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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<?php
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/*  PowerAdmin, a friendly web-based admin tool for PowerDNS.
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 *  See <https://rejo.zenger.nl/poweradmin> for more details.
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 *
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 *  Copyright 2007, 2008  Rejo Zenger <rejo@zenger.nl>
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 *
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 *  This program is free software: you can redistribute it and/or modify
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 *  it under the terms of the GNU General Public License as published by
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 *  the Free Software Foundation, either version 3 of the License, or
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 *  (at your option) any later version.
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 *
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 *  This program is distributed in the hope that it will be useful,
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 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
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 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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 *  GNU General Public License for more details.
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 *
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 *  You should have received a copy of the GNU General Public License
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 *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
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 */
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/*
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 * Validates an IPv4 IP.
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 * returns true if valid.
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 */
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function validate_input($zoneid, $type, &$content, &$name, &$prio, &$ttl)
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{
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	global $db;
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	// Has to validate content first then it can do the rest
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	// Since if content is invalid already it can aswell be just removed
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	// Check first if content is IPv4, IPv6 or Hostname
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	// We accomplish this by just running all tests over it
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	// We start with IPv6 since its not able to have these ip's in domains.
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	//
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	// <TODO>
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	// The nocheck has to move to the configuration file
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	// </TODO>
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	//
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	$domain = get_domain_name_from_id($zoneid);
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	$nocheck = array('SOA', 'HINFO', 'NAPTR', 'URL', 'MBOXFW', 'TXT');
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	$hostname = false;
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	$ip4 = false;
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	$ip6 = false;
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	if(!in_array(strtoupper($type), $nocheck)) {
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		if(!is_valid_ip6($content)) {
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			if(!is_valid_ip($content)) {
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				if(!is_valid_hostname($content)) {
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					error(ERR_DNS_CONTENT);
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					return false;
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				} else {
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					$hostname = true;
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				}
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			} else {
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				$ip4 = true;
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			}
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		} else {
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			$ip6 = true;
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		}
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	}
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	// Prepare total hostname.
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	if ($name == '*') {
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		$wildcard = true;
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	} else {
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		$wildcard = false;
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	}
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	if (preg_match("/@/", $name)) {
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		$name = $domain ;
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	} elseif ( !(preg_match("/$domain$/i", $name))) {
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		if ( isset($name) && $name != "" ) {
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			$name = $name . "." . $domain ;
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		} else {
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			$name = $domain ;
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		}
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	}
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	if(!$wildcard) {
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		if(!is_valid_hostname($name)) {
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			error(ERR_DNS_HOSTNAME);
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			return false;
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		}
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	}
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	// Check record type (if it exists in our allowed list.
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	if (!in_array(strtoupper($type), get_record_types())) {
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		error(ERR_DNS_RECORDTYPE);
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		return false;
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	}
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	// Start handling the demands for the functions.
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	// Validation for IN A records. Can only have an IP. Nothing else.
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	if ($type == 'A' && !$ip4) {
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		error(ERR_DNS_IPV4);
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		return false;
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	}
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	if ($type == 'AAAA' && !$ip6) {
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		error(ERR_DNS_IPV6);
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		return false;
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	}
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	if ($type == 'CNAME' && $hostname) {
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		if(!is_valid_cname($name)) {
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			error(ERR_DNS_CNAME);
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			return false;
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		}
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	}
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	if ($type == 'NS') {
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		$status = is_valid_ns($content, $hostname);
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		if($status == -1) {
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			error(ERR_DNS_NS_HNAME);
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			return false;
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		}
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		elseif($status == -2) {
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			error(ERR_DNS_NS_CNAME);
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			return false;
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		}
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	}
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	if ($type == 'SOA') {
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		$status = is_valid_soa($content, $zoneid);
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		if($status == -1) {
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			error(ERR_DNS_SOA_UNIQUE);
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		} elseif($status == -2) {
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			error(ERR_DNS_SOA_NUMERIC);
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			return false;
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		}
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	}
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	// HINFO and TXT require no validation.
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	if ($type == 'URL') {
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		if(!is_valid_url($content)) {
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			error(ERR_INV_URL);
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			return false;
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		}
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	}
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	if ($type == 'MBOXFW') 	{
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		if(!is_valid_mboxfw($content)) {
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			error(ERR_INV_EMAIL);
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			return false;
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		}
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	}
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	// NAPTR has to be done.
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	// Do we want that?
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	// http://www.ietf.org/rfc/rfc2915.txt
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	// http://www.zvon.org/tmRFC/RFC2915/Output/chapter2.html
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	// http://www.zvon.org/tmRFC/RFC3403/Output/chapter4.html
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	// See if the prio field is valid and if we have one.
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	// If we dont have one and the type is MX record, give it value '10'
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	if($type == 'NAPTR') {
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	}
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	if($type == 'MX') {
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		if($hostname) {
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			$status = is_valid_mx($content, $prio);
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			if($status == -1) {
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				error(ERR_DNS_MX_CNAME);
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				return false;
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			}
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			elseif($status == -2) {
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				error(ERR_DNS_MX_PRIO);
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				return false;
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			}
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		} else {
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			error( _('If you specify an MX record it must be a hostname.') ); // TODO make error
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			return false;
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		}
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	} else {
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		$prio=0;
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	}
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	// Validate the TTL, it has to be numeric.
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	$ttl = (!isset($ttl) || !is_numeric($ttl)) ? $DEFAULT_TTL : $ttl;
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	return true;
1
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}
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parents:
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parents:
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		/****************************************
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   189
		 *					*
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   190
		 * RECORD VALIDATING PART.		*
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   191
		 * CHANGES HERE SHOULD BE CONSIDERED	*
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   192
		 * THEY REQUIRE KNOWLEDGE ABOUT THE 	*
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   193
		 * DNS SPECIFICATIONS			*
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   194
		 *					*
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   195
		 ***************************************/
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   196
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parents:
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/*
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 * Validatis a CNAME record by the name it will have and its destination
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 *
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 */
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   202
function is_valid_cname($dest)
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{
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	/*
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	 * This is really EVIL.
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	 * If the new record (a CNAME) record is being pointed to by a MX record or NS record we have to bork.
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	 * this is the idea.
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   208
	 *
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   209
	 * MX record: blaat.nl MX mail.blaat.nl
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   210
	 * Now we look what mail.blaat.nl is
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   211
	 * We discover the following:
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   212
	 * mail.blaat.nl CNAME bork.blaat.nl
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   213
	 * This is NOT allowed! mail.onthanet.nl can not be a CNAME!
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   214
	 * The same goes for NS. mail.blaat.nl must have a normal IN A record.
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   215
	 * It MAY point to a CNAME record but its not wished. Lets not support it.
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parents:
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   216
	 */
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   217
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   218
	global $db;
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   219
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   220
	// Check if there are other records with this information of the following types.
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parents:
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   221
	// P.S. we might add CNAME to block CNAME recursion and chains.
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   222
	$blockedtypes = " AND (type='MX' OR type='NS')";
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   223
65
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   224
	$cnamec = "SELECT type, content FROM records WHERE content=".$db->quote($dest) . $blockedtypes;
1
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   225
	$result = $db->query($cnamec);
58094faf794d [feladat @ 2]
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parents:
diff changeset
   226
58094faf794d [feladat @ 2]
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parents:
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   227
	if($result->numRows() > 0)
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parents:
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   228
	{
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   229
		return false;
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parents:
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   230
		// Lets inform the user he is doing something EVIL.
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parents:
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   231
		// Ok we found a record that has our content field in their content field.
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parents:
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   232
	}
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   233
	return true;
58094faf794d [feladat @ 2]
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parents:
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   234
}
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parents:
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   235
58094faf794d [feladat @ 2]
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parents:
diff changeset
   236
58094faf794d [feladat @ 2]
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parents:
diff changeset
   237
/*
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parents:
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   238
 * Checks if something is a valid domain.
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parents:
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   239
 * Checks for domainname with the allowed characters <a,b,...z,A,B,...Z> and - and _.
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parents:
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   240
 * This part must be followed by a 2 to 4 character TLD.
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parents:
diff changeset
   241
 */
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   242
function is_valid_domain($domain)
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   243
{
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   244
	if ((eregi("^[0-9a-z]([-.]?[0-9a-z])*\\.[a-z]{2,4}$", $domain)) && (strlen($domain) <= 128))
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parents:
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   245
	{
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parents:
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   246
		return true;
58094faf794d [feladat @ 2]
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parents:
diff changeset
   247
	}
58094faf794d [feladat @ 2]
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parents:
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   248
	return false;
58094faf794d [feladat @ 2]
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parents:
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   249
}
58094faf794d [feladat @ 2]
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parents:
diff changeset
   250
58094faf794d [feladat @ 2]
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parents:
diff changeset
   251
58094faf794d [feladat @ 2]
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parents:
diff changeset
   252
/*
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   253
 * Validates if given hostname is allowed.
58094faf794d [feladat @ 2]
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parents:
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   254
 * returns true if allowed.
58094faf794d [feladat @ 2]
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parents:
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   255
 */
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parents:
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   256
function is_valid_hostname($host)
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parents:
diff changeset
   257
{
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   258
	if(count(explode(".", $host)) == 1)
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parents:
diff changeset
   259
	{
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   260
		return false;
58094faf794d [feladat @ 2]
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parents:
diff changeset
   261
	}
58094faf794d [feladat @ 2]
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parents:
diff changeset
   262
58094faf794d [feladat @ 2]
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parents:
diff changeset
   263
	// Its not perfect (in_addr.int is allowed) but works for now.
58094faf794d [feladat @ 2]
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parents:
diff changeset
   264
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   265
	if(preg_match('!(ip6|in-addr).(arpa|int)$!i', $host))
58094faf794d [feladat @ 2]
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parents:
diff changeset
   266
	{
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parents:
diff changeset
   267
		if(preg_match('!^(([A-Z\d]|[A-Z\d][A-Z\d-]*[A-Z\d])\.)*[A-Z\d]+$!i', $host))
58094faf794d [feladat @ 2]
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parents:
diff changeset
   268
		{
58094faf794d [feladat @ 2]
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parents:
diff changeset
   269
			return true;
58094faf794d [feladat @ 2]
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parents:
diff changeset
   270
		}
58094faf794d [feladat @ 2]
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parents:
diff changeset
   271
		return false;
58094faf794d [feladat @ 2]
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parents:
diff changeset
   272
	}
58094faf794d [feladat @ 2]
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parents:
diff changeset
   273
58094faf794d [feladat @ 2]
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parents:
diff changeset
   274
	// Validate further.
58094faf794d [feladat @ 2]
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diff changeset
   275
	return (preg_match('!^(([A-Z\d]|[A-Z\d][A-Z\d-]*[A-Z\d])\.)*[A-Z\d]+$!i', $host)) ? true : false;
58094faf794d [feladat @ 2]
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parents:
diff changeset
   276
}
58094faf794d [feladat @ 2]
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parents:
diff changeset
   277
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   278
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   279
/*
58094faf794d [feladat @ 2]
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parents:
diff changeset
   280
 * Validates an IPv4 IP.
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   281
 * returns true if valid.
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   282
 */
58094faf794d [feladat @ 2]
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parents:
diff changeset
   283
function is_valid_ip($ip)
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   284
{
58094faf794d [feladat @ 2]
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parents:
diff changeset
   285
	// Stop reading at this point. Scroll down to the next function...
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   286
	// Ok... you didn't stop reading... now you have to rewrite the whole function! enjoy ;-)
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   287
	// Trance unborked it. Twice even!
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   288
	return ($ip == long2ip(ip2long($ip))) ? true : false;
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   289
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   290
}
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   291
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   292
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   293
/*
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   294
 * Validates an IPv6 IP.
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   295
 * returns true if valid.
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   296
 */
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   297
function is_valid_ip6($ip)
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   298
{
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   299
	// Validates if the given IP is truly an IPv6 address.
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   300
	// Precondition: have a string
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   301
	// Postcondition: false: Error in IP
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   302
	//                true: IP is correct
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   303
	// Requires: String
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   304
	// Date: 10-sep-2002
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   305
	if(preg_match('!^[A-F0-9:]{1,39}$!i', $ip) == true)
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   306
	{
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   307
		// Not 3 ":" or more.
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   308
		$p = explode(':::', $ip);
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   309
		if(sizeof($p) > 1)
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   310
		{
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   311
			return false;
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   312
		}
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   313
		// Find if there is only one occurence of "::".
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   314
		$p = explode('::', $ip);
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   315
		if(sizeof($p) > 2)
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   316
		{
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   317
			return false;
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   318
		}
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   319
		// Not more than 8 octects
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   320
		$p = explode(':', $ip);
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   321
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   322
		if(sizeof($p) > 8)
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   323
		{
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   324
			return false;
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   325
		}
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   326
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   327
		// Check octet length
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   328
		foreach($p as $checkPart)
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   329
		{
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   330
			if(strlen($checkPart) > 4)
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   331
			{
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   332
				return false;
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   333
			}
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   334
		}
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   335
		return true;
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   336
	}
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   337
	return false;
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   338
}
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   339
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   340
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   341
/*
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   342
 * FANCY RECORD.
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   343
 * Validates if the fancy record mboxfw is an actual email address.
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   344
 */
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   345
function is_valid_mboxfw($email)
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   346
{
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   347
	return is_valid_email($email);
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   348
}
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   349
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   350
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   351
/*
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   352
 * Validates MX records.
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   353
 * an MX record cant point to a CNAME record. This has to be checked.
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   354
 * this function also sets a proper priority.
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   355
 */
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   356
function is_valid_mx($content, &$prio)
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   357
{
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   358
	global $db;
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   359
	// See if the destination to which this MX is pointing is NOT a CNAME record.
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   360
	// Check inside our dns server.
65
ce1c4d5e1576 [feladat @ 112]
peter
parents: 62
diff changeset
   361
	if($db->queryOne("SELECT count(id) FROM records WHERE name=".$db->quote($content)." AND type='CNAME'") > 0)
1
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   362
	{
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   363
		return -1;
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   364
	}
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   365
	else
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   366
	{
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   367
		// Fix the proper priority for the record.
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   368
		// Bugfix, thanks Oscar :)
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   369
		if(!isset($prio))
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   370
		{
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   371
			$prio = 10;
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   372
		}
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   373
		if(!is_numeric($prio))
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   374
		{
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   375
			if($prio == '')
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   376
			{
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   377
				$prio = 10;
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   378
			}
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   379
			else
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   380
			{
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   381
				return -2;
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   382
			}
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   383
		}
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   384
	}
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   385
	return 1;
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   386
}
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   387
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   388
/*
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   389
 * Validates NS records.
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   390
 * an NS record cant point to a CNAME record. This has to be checked.
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   391
 * $hostname directive means if its a hostname or not (this to avoid that NS records get ip fields)
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   392
 * NS must have a hostname, it is not allowed to have an IP.
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   393
 */
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   394
function is_valid_ns($content, $hostname)
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   395
{
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   396
	global $db;
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   397
	// Check if the field is a hostname, it MUST be a hostname.
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   398
	if(!$hostname)
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   399
	{
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   400
		return -1;
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   401
		// "an IN NS field must be a hostname."
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   402
	}
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   403
65
ce1c4d5e1576 [feladat @ 112]
peter
parents: 62
diff changeset
   404
	if($db->queryOne("SELECT count(id) FROM records WHERE name=".$db->quote($content)." AND type='CNAME'") > 0)
1
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   405
	{
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   406
		return -2;
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   407
		// "You can not point a NS record to a CNAME record. Remove/rename the CNAME record first or take another name."
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   408
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   409
	}
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   410
	return 1;
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   411
}
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   412
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   413
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   414
/*
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   415
 * Function to check the validity of SOA records.
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   416
 * return values: true if succesful
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   417
 */
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   418
function is_valid_soa(&$content, $zoneid)
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   419
{
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   420
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   421
	/*
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   422
	 * SOA (start of authority)
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   423
	 * there is only _ONE_ SOA record allowed in every zone.
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   424
	 * Validate SOA record
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   425
	 * The Start of Authority record is one of the most complex available. It specifies a lot
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   426
	 * about a domain: the name of the master nameserver ('the primary'), the hostmaster and
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   427
	 * a set of numbers indicating how the data in this domain expires and how often it needs
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   428
	 * to be checked. Further more, it contains a serial number which should rise on each change
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   429
	 * of the domain.
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   430
	 					    2002120902 28800 7200 604800 10800
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   431
	 * The stored format is: primary hostmaster serial refresh retry expire default_ttl
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   432
	 * From the powerdns documentation.
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   433
	 */
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   434
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   435
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   436
	// Check if there already is an occurence of a SOA, if so see if its not the one we are currently changing
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   437
	$return = get_records_by_type_from_domid("SOA", $zoneid);
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   438
	if($return->numRows() > 1)
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   439
	{
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   440
		return -1;
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   441
	}
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   442
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   443
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   444
	$soacontent = explode(" ", $content);
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   445
	// Field is at least one otherwise it wouldnt even get here.
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   446
	if(is_valid_hostname($soacontent[0]))
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   447
	{
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   448
		$totalsoa = $soacontent[0];
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   449
		// It doesnt matter what field 2 contains, but lets check if its there
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   450
		// We assume the 2nd field wont have numbers, otherwise its a TTL field
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   451
		if(count($soacontent) > 1)
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   452
		{
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   453
			if(is_numeric($soacontent[1]))
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   454
			{
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   455
				// its a TTL field, or at least not hostmaster or alike
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   456
				// Set final string to the default hostmaster addy
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   457
				global $HOSTMASTER;
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   458
				$totalsoa .= " ". $HOSTMASTER;
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   459
			}
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   460
			else
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   461
			{
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   462
				$totalsoa .= " ".$soacontent[1];
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   463
			}
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   464
			// For loop to iterate over the numbers
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   465
			$imax = count($soacontent);
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   466
			for($i = 2; ($i < $imax) && ($i < 7); $i++)
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   467
			{
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   468
				if(!is_numeric($soacontent[$i]))
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   469
				{
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   470
					return -2;
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   471
				}
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   472
				else
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   473
				{
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   474
					$totalsoa .= " ".$soacontent[$i];
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   475
				}
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   476
			}
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   477
			if($i > 7)
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   478
			{
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   479
				error(ERR_DNS_SOA_NUMERIC_FIELDS);
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   480
			}
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   481
		}
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   482
	}
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   483
	else
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   484
	{
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   485
		error(ERR_DNS_SOA_HOSTNAME);
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   486
	}
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   487
	$content = $totalsoa;
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   488
	return 1;
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   489
}
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   490
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   491
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   492
function is_valid_url($url)
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   493
{
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   494
	return preg_match('!^(http://)(([A-Z\d]|[A-Z\d][A-Z\d-]*[A-Z\d])\.)*[A-Z\d]+([//]([0-9a-z//~#%&\'_\-+=:?.]*))?$!i',  $url);
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   495
}
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   496
62
ce4919f37489 [feladat @ 109]
rejo
parents: 55
diff changeset
   497
function is_valid_search($holygrail)
ce4919f37489 [feladat @ 109]
rejo
parents: 55
diff changeset
   498
{
ce4919f37489 [feladat @ 109]
rejo
parents: 55
diff changeset
   499
	// Only allow for alphanumeric, numeric, dot, dash, underscore and 
ce4919f37489 [feladat @ 109]
rejo
parents: 55
diff changeset
   500
	// percent in search string. The last two are wildcards for SQL.
ce4919f37489 [feladat @ 109]
rejo
parents: 55
diff changeset
   501
	// Needs extension probably for more usual record types.
ce4919f37489 [feladat @ 109]
rejo
parents: 55
diff changeset
   502
ce4919f37489 [feladat @ 109]
rejo
parents: 55
diff changeset
   503
	return preg_match('/^[a-z0-9.\-%_]+$/i', $holygrail);
ce4919f37489 [feladat @ 109]
rejo
parents: 55
diff changeset
   504
}
ce4919f37489 [feladat @ 109]
rejo
parents: 55
diff changeset
   505
ce4919f37489 [feladat @ 109]
rejo
parents: 55
diff changeset
   506
1
58094faf794d [feladat @ 2]
rejo
parents:
diff changeset
   507
?>