<?php
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/*
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Copyright (c) 2005, Till Brehm, Falko Timme, projektfarm Gmbh
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All rights reserved.
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Redistribution and use in source and binary forms, with or without modification,
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are permitted provided that the following conditions are met:
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* Redistributions of source code must retain the above copyright notice,
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this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright notice,
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this list of conditions and the following disclaimer in the documentation
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and/or other materials provided with the distribution.
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* Neither the name of ISPConfig nor the names of its contributors
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may be used to endorse or promote products derived from this software without
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specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
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INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
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EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/**
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* DNS validation
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*
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* @author Falko Timme <ft@falkotimme.com>
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* @copyright Copyright © 2005, Falko Timme
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*/
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class validate_dns {
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function validate_field($field, $area, $zoneid, $wildcard_allowed = 1){
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//$desc: Name, Data, RP mbox, RP txtref, SRV target, Zone origin, Name server, Admin email
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global $app, $conf;
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switch ($area) {
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case "Name":
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$desc = $app->tform->wordbook['name_txt'];
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break;
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case "Data":
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$desc = $app->tform->wordbook['data_txt'];
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break;
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case "RP mbox":
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$desc = $app->tform->wordbook['rp_mbox_txt'];
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break;
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case "RP txtref":
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$desc = $app->tform->wordbook['rp_txtref_txt'];
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break;
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case "SRV target":
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$desc = $app->tform->wordbook['srv_target_txt'];
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break;
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case "Zone origin":
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$desc = $app->tform->wordbook['zone_origin_txt'];
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break;
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case "Name server":
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$desc = $app->tform->wordbook['ns_txt'];
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break;
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case "Admin email":
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$desc = $app->tform->wordbook['mbox_txt'];
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break;
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}
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$error = '';
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$valid_characters = "*ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz1234567890-_";
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if(strlen($field) > 255) $error .= $desc." ".$app->tform->wordbook['error_255_characters']."<br>\r\n";
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$parts = explode(".", $field);
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$i = 0;
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$empty = 0;
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foreach ($parts as $part){
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$i++;
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if(trim($part) == '') $empty += 1;
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if(strlen($part) > 63) $error .= $desc." ".$app->tform->wordbook['error_63_characters']."<br>\r\n";
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if(strspn($part, $valid_characters) != strlen($part)) $error .= $desc." ".$app->tform->wordbook['error_invalid_characters']."<br>\r\n";
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if(substr($part, 0, 1) == '-') $error .= $desc." ".$app->tform->wordbook['error_hyphen_begin']."<br>\r\n";
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if(substr($part, -1) == '-') $error .= $desc." ".$app->tform->wordbook['error_hyphen_end']."<br>\r\n";
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if(strstr($part, "*")){
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if($wildcard_allowed){
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if($i != 1) $error .= $desc." ".$app->tform->wordbook['error_wildcard_non_initial_part']."<br>\r\n";
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if($part != "*") $error .= $desc." ".$app->tform->wordbook['error_wildcard_mix']."<br>\r\n";
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} else {
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$error .= $desc." ".$app->tform->wordbook['error_no_wildcard_allowed']."<br>\r\n";
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}
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}
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}
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if(substr($field, -1) == '.'){
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if($i > 2 && $empty > 1) $error .= $desc." ".$app->tform->wordbook['error_invalid_characters']."<br>\r\n";
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} else {
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if($empty > 0) $error .= $desc." ".$app->tform->wordbook['error_invalid_characters']."<br>\r\n";
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}
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if(substr($field, -1) == '.' && $area == 'Name'){
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$soa = $app->db->queryOneRecord("SELECT * FROM soa WHERE id = ".$zoneid);
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if(substr($field, (strlen($field) - strlen($soa['origin']))) != $soa['origin']) $error .= $desc." ".$app->tform->wordbook['error_out_of_zone']."<br>\r\n";
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}
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return $error;
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}
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function validate_rp_data(&$data, $zoneid){
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global $app, $conf;
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$error = '';
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$fields = explode(" ", trim($data));
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if(count($fields) != 2) return $error .= $app->tform->wordbook['data_txt']." ".$app->tform->wordbook['error_invalid_rp']."<br>\r\n";
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$mbox = $fields[0];
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$txtref = $fields[1];
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$error .= $this->validate_field($mbox, 'RP mbox', $zoneid, 0);
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$error .= $this->validate_field($txtref, 'RP txtref', $zoneid, 0);
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$data = $mbox." ".$txtref;
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return $error;
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}
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function validate_srv_data(&$data, $zoneid){
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global $app, $conf;
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$error = '';
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$fields = explode(" ", trim($data));
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if(count($fields) != 3) return $error .= $app->tform->wordbook['data_txt']." ".$app->tform->wordbook['error_invalid_srv']."<br>\r\n";
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$weight = $fields[0];
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$port = $fields[1];
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$target = $fields[2];
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if($weight < 0 || $weight > 65535) $error .= $app->tform->wordbook['weight_txt']." (\"<i>" . htmlentities($weight)."</i>\") ".$app->tform->wordbook['error_srv_out_of_range']."<br>\r\n";
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if ($port < 0 || $port > 65535) $error .= $app->tform->wordbook['port_txt']." (\"<i>".htmlentities($port)."</i>\") ".$app->tform->wordbook['error_srv_out_of_range']."<br>\r\n";
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$error .= $this->validate_field($target, "SRV target", $zoneid, 0);
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$data = (int)$weight." ".(int)$port." ".$target;
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return $error;
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}
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function is_integer($value, $fieldname, $zero_allowed = 0){
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global $app, $conf;
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$error = '';
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if(intval($value) != $value || !is_numeric($value)) $error .= $fieldname." ".$app->tform->wordbook['error_must_be_integer']."<br>\r\n";
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if($value > 2147483647) $error .= $fieldname." ".$app->tform->wordbook['error_must_not_be_greater_than_2147483647']."<br>\r\n";
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if(!$zero_allowed){
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if($value <= 0) $error .= $fieldname." ".$app->tform->wordbook['error_must_be_positive']."<br>\r\n";
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} else {
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if($value < 0) $error .= $fieldname." ".$app->tform->wordbook['error_must_not_be_negative']."<br>\r\n";
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}
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return $error;
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}
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function validate_rr(&$rr){
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global $app, $conf;
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$error = '';
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$tmp_rr = $rr;
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foreach($tmp_rr as $key => $val){
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$rr[$key] = trim($val);
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}
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unset($tmp_rr);
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$error .= $this->validate_field($rr['name'], 'Name', $rr['zone'], 1);
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switch ($rr['type']) {
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case "A":
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$ip_parts = explode(".", $rr['data']);
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if(count($ip_parts) != 4){
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$error .= $app->tform->wordbook['data_txt']." ".$app->tform->wordbook['error_a']."<br>\r\n";
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} else {
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for($n = 0; $n < 4; $n++){
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$q = $ip_parts[$n];
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if(!is_numeric($q) || (int)$q < 0 || (int)$q > 255 || trim($q) !== $q) $error .= $app->tform->wordbook['data_txt']." ".$app->tform->wordbook['error_a']."<br>\r\n";
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}
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}
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$rr['data'] = (int)$ip_parts[0].".".(int)$ip_parts[1].".".(int)$ip_parts[2].".".(int)$ip_parts[3];
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break;
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case "AAAA":
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$valid_chars = "ABCDEFabcdef1234567890:";
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if(strspn($rr['data'], $valid_chars) != strlen($rr['data'])) $error .= $app->tform->wordbook['data_txt']." ".$app->tform->wordbook['error_aaaa']."<br>\r\n";
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break;
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case "ALIAS":
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$error .= $this->validate_field($rr['data'], 'Data', $rr['zone'], 0);
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break;
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case "CNAME":
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$error .= $this->validate_field($rr['data'], 'Data', $rr['zone'], 0);
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break;
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case "HINFO":
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if(!strchr($rr['data'], ' ')) $error .= $app->tform->wordbook['data_txt']." ".$app->tform->wordbook['error_hinfo']."<br>\r\n";
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break;
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case "MX":
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$error .= $this->validate_field($rr['data'], 'Data', $rr['zone'], 0);
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$error .= $this->is_integer($rr['aux'], $app->tform->wordbook['aux_txt'], 1);
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break;
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case "NS":
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$error .= $this->validate_field($rr['data'], 'Data', $rr['zone'], 0);
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break;
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case "PTR":
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$error .= $this->validate_field($rr['data'], 'Data', $rr['zone'], 0);
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if(substr($rr['data'], -1) != '.') $error .= $app->tform->wordbook['data_txt']." ".$app->tform->wordbook['error_ptr']."<br>\r\n";
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break;
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case "RP":
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$error .= $this->validate_rp_data($rr['data'], $rr['zone']);
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break;
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case "SRV":
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$error .= $this->validate_srv_data($rr['data'], $rr['zone']);
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$error .= $this->is_integer($rr['aux'], $app->tform->wordbook['aux_txt'], 1);
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break;
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case "TXT":
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break;
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}
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$error .= $this->is_integer($rr['ttl'], $app->tform->wordbook['ttl_txt']);
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return $error;
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}
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function validate_soa(&$soa){
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global $app, $conf;
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$error = '';
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$tmp_soa = $soa;
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foreach($tmp_soa as $key => $val){
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if($key != 'active') $soa[$key] = trim($val);
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}
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unset($tmp_soa);
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if($soa['origin'] == '') $error .= $app->tform->wordbook['origin_txt']." ".$app->tform->wordbook['error_empty']."<br>\r\n";
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if(substr($soa['origin'], -1) != '.') $error .= $app->tform->wordbook['origin_txt']." ".$app->tform->wordbook['error_dot']."<br>\r\n";
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$error .= $this->validate_field($soa['origin'], "Zone origin", $soa['id'], 0);
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$error .= $this->is_integer($soa['ttl'], $app->tform->wordbook['ttl_txt']);
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if($soa['ns'] == '') $error .= $app->tform->wordbook['ns_txt']." ".$app->tform->wordbook['error_empty']."<br>\r\n";
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$error .= $this->validate_field($soa['ns'], "Name server", $soa['id'], 0);
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if($soa['mbox'] == '') $error .= $app->tform->wordbook['mbox_txt']." ".$app->tform->wordbook['error_empty']."<br>\r\n";
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$error .= $this->validate_field($soa['mbox'], "Admin email", $soa['id'], 0);
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$error .= $this->is_integer($soa['refresh'], $app->tform->wordbook['refresh_txt']);
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$error .= $this->is_integer($soa['retry'], $app->tform->wordbook['retry_txt']);
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$error .= $this->is_integer($soa['expire'], $app->tform->wordbook['expire_txt']);
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$error .= $this->is_integer($soa['minimum'], $app->tform->wordbook['minimum_txt']);
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return $error;
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}
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function increase_serial($serial){
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global $app, $conf;
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// increase serial
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$serial_date = substr($serial, 0, 8);
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$count = intval(substr($serial, 8, 2));
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$current_date = date("Ymd");
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if($serial_date >= $current_date){
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$count += 1;
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$count = str_pad($count, 2, "0", STR_PAD_LEFT);
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$new_serial = $serial_date.$count;
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} else {
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$new_serial = $current_date.'01';
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}
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return $new_serial;
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}
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}
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