<?
///////////////////////////////////////////////////////////////////////////
//
//    DNSBL - Spam IP address checker.
//    Copyright (C) 2011 Alexey A.Znayev
//
//    This program is free software: you can redistribute it and/or modify
//    it under the terms of the GNU General Public License as published by
//    the Free Software Foundation, either version 3 of the License, or
//    (at your option) any later version.
//
//    This program is distributed in the hope that it will be useful,
//    but WITHOUT ANY WARRANTY; without even the implied warranty of
//    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
//    GNU General Public License for more details.
//
//    You should have received a copy of the GNU General Public License
//    along with this program.  If not, see <http://www.gnu.org/licenses/>.
//
//    Alexey A.Znayev, znaeff@mail.ru, http://xbsoft.org, http://xbsoft.ru
//
///////////////////////////////////////////////////////////////////////////

// This file contains public class DNSBL

// This class performs IP address check in spam blocking lists as described
// on http://ru.wikipedia.org/wiki/RBL

class DNSBL {

    private $_aCheckers = array(	// list of checkers available for individual checking
	    'spamhaus' 	=> array('.zen.spamhaus.org', true), 	//available for group checking with 'all' key
	    'spamcop' 	=> array('.bl.spamcop.net',   true),	//available for group checking with 'all' key
	    'dsbl' 	=> array('.list.dsbl.org',    false),	//not available for group checking with 'all' key
	    'ordb' 	=> array('.relays.ordb.org',  false),	//not available for group checking with 'all' key
	    'sorbs' 	=> array('.dnsbl.sorbs.net',  false),	//not available for group checking with 'all' key
	    'njabl' 	=> array('.dnsbl.njabl.org',  false)	//not available for group checking with 'all' key
    ); // AZ - 1. Key 'all' is illegal
       // AZ - 2. Most of spammer IP addresses is covered by 'spamhaus' & 'spamcop' (and they are fast),
       //         some of the rest may not work sometimes, you can make them group checking available after individual testing
    
    private $_sDefaultChecker = 'spamhaus';

///////////////////////////////////////////////////////////////////////////
// CheckSpamIP - check IP for spam in checkers : given, default or all available for group checking (may be slow)
// parameters:
// string $ip - ip address
// string $checker - checker name or 'all' or nothing
// returns:
// true when IP exitsts in spam-lists of $checker or at least one of all checkers
// false when not or when ip address is local or not correct
    public function CheckSpamIP($ip, $checker = ''){
	if(empty($ip)) return false;
	if(preg_match('/^\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}$/', $ip) != 1) return false;
	$octets = explode('.', $ip);
	if($octets[0] == '127') return false;
	if($octets[0] == '10') return false;
	if($octets[0] == '192' && $octets[0] == '168') return false;
	if($octets[0] == '169' && $octets[0] == '254') return false;	// ms windows
	if((int)$octets[0] > 255 || (int)$octets[1] > 255 || (int)$octets[2] > 255 || (int)$octets[3] > 255 ) return false;
	$ret_val = false;
	$PTR = implode(array_reverse($octets), '.');
	if($checker === 'all'){
	    foreach(array_values($this->_aCheckers) as $c){
		if($c[1]){
		    $ret_val = $ret_val || $this->_CheckDNSAnswer(dns_get_record($PTR . $c[0], DNS_A));
		}
		if($ret_val) break;
	    }
	}else if(array_key_exists($checker, $this->_aCheckers)){
    	    $ret_val = $this->_CheckDNSAnswer(dns_get_record($PTR . $this->_aCheckers[$checker][0], DNS_A));
	}else{
    	    $ret_val = $this->_CheckDNSAnswer(dns_get_record($PTR . $this->_aCheckers[$this->_sDefaultChecker][0], DNS_A));
	}
	return $ret_val;
    }

///////////////////////////////////////////////////////////////////////////
// GetCheckers - gets list of available checker names
// returns:
// array of strings
    public function GetCheckers(){
	return array_keys($this->_aCheckers);
    }        

///////////////////////////////////////////////////////////////////////////
// GetGroupCheckers - gets list of checker names available for group checking with 'all' key
// returns:
// array of strings
    public function GetGroupCheckers(){
	$ret_val = array();
	foreach(array_keys($this->_aCheckers) as $k) if($this->_aCheckers[$k][1]) array_push($ret_val, $k);
	return $ret_val;
    }        

///////////////////////////////////////////////////////////////////////////
// GetDefaultChecker - gets default checker name
// returns:
// string
    public function GetDefaultChecker(){
	return $this->_sDefaultChecker;
    }

///////////////////////////////////////////////////////////////////////////
// SetDefaultChecker - sets default checker name
// parameters:
// string $new_checker - new default checker name
// returns:
// true when success
// false when failed ($new_checker is not in the list of available checker names)
    public function SetDefaultChecker($new_checker){
	if(array_key_exists($new_checker, $this->_aCheckers)){
	    $this->_sDefaultChecker = $new_checker;
	    return true;
	}else{
	    return false;
	}
    }

///////////////////////////////////////////////////////////////////////////
// EnableGroupChecking - sets checker available for group checking
// parameters:
// string $checker - checker name
// returns:
// true when success ($checker is included)
// false when failed ($checker is not in the list of available checker names)
    public function EnableGroupChecking($checker){
	if(array_key_exists($checker, $this->_aCheckers)){
	    $this->_aCheckers[$checker][1] = true;
	    return true;
	}else{
	    return false;
	}
    }

///////////////////////////////////////////////////////////////////////////
// DisableGroupChecking - sets checker not available for group checking
// parameters:
// string $checker - checker name
// returns:
// true when success ($checker is excluded)
// false when failed ($checker is not in the list of available checker names)
    public function DisableGroupChecking($checker){
	if(array_key_exists($checker, $this->_aCheckers)){
	    $this->_aCheckers[$checker][1] = false;
	    return true;
	}else{
	    return false;
	}
    }

// private methods

///////////////////////////////////////////////////////////////////////////
// _CheckDNSAnswer - checks DNS-server answer for 127.0.0.* values
// returns:
// true when success
// false when failed
    private function _CheckDNSAnswer($dns_answer){
	if(!is_array($dns_answer)) return false;
	$len = count($dns_answer);
	if($len <= 0) return false;
	for($i=0; $i<$len; $i++){
	    $obj = $dns_answer[$i];
	    if(!(is_object($obj) || is_array($obj))) return false;
	    $ip_str = $obj['ip'];
	    if(!is_string($ip_str)) return false;
	    $pos = strpos($ip_str, '127.0.0.');
	    if($pos !== false) return true;
	}
	return false;
    }        

} // end of class DNSBL

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				Monthly Archives: <span>May 2014</span>			</h1>


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			<h2 class="entry-title"><a href="https://blog.fabian-affolter.ch/openvas-7-and-fedora-ii/" title="Permalink to OpenVAS 7 and Fedora II" rel="bookmark">OpenVAS 7 and Fedora II</a></h2>

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				<span class="meta-prep meta-prep-author">Posted on</span> <a href="https://blog.fabian-affolter.ch/openvas-7-and-fedora-ii/" title="21:45" rel="bookmark"><span class="entry-date">May 27, 2014</span></a> <span class="meta-sep">by</span> <span class="author vcard"><a class="url fn n" href="https://blog.fabian-affolter.ch/author/fab/" title="View all posts by Fabian Affolter">Fabian Affolter</a></span>			</div><!-- .entry-meta -->
			
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<p>A while back I talked about the latest OpenVAS release and packages for Fedora. I happy to announce that the packages now are in Fedora Rawhide. We would be happy to get feedback for packages. Thanks. A special thanks goes &hellip; Continue reading &...</a></p>	
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				<span class="meta-prep meta-prep-author">Posted on</span> <a href="https://blog.fabian-affolter.ch/alpine-linux-2-7-8-released/" title="20:58" rel="bookmark"><span class="entry-date">May 21, 2014</span></a> <span class="meta-sep">by</span> <span class="author vcard"><a class="url fn n" href="https://blog.fabian-affolter.ch/author/fab/" title="View all posts by Fabian Affolter">Fabian Affolter</a></span>			</div><!-- .entry-meta -->
			
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<p>The Alpine Linux project is pleased to announce the immediate availability of version 2.7.8 of its Alpine Linux operating system. This is a bugfix release which is based on the 3.10.40 kernel that has some critical security fixes. Download: http://al...</a></p>	
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				<span class="meta-prep meta-prep-author">Posted on</span> <a href="https://blog.fabian-affolter.ch/alpine-linux-2-7-7-released/" title="22:54" rel="bookmark"><span class="entry-date">May 6, 2014</span></a> <span class="meta-sep">by</span> <span class="author vcard"><a class="url fn n" href="https://blog.fabian-affolter.ch/author/fab/" title="View all posts by Fabian Affolter">Fabian Affolter</a></span>			</div><!-- .entry-meta -->
			
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<p>The Alpine Linux project is pleased to announce the immediate availability of version 2.7.7 of its Alpine Linux operating system. This is a bugfix release which is based on the 3.10.38 kernel. Download: http://alpinelinux.org/downloads Documentation:...</a></p>	
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			<h2 class="entry-title"><a href="https://blog.fabian-affolter.ch/htc-one-xl/" title="Permalink to HTC One XL und CyanogenMod" rel="bookmark">HTC One XL und CyanogenMod</a></h2>

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				<span class="meta-prep meta-prep-author">Posted on</span> <a href="https://blog.fabian-affolter.ch/htc-one-xl/" title="22:58" rel="bookmark"><span class="entry-date">May 2, 2014</span></a> <span class="meta-sep">by</span> <span class="author vcard"><a class="url fn n" href="https://blog.fabian-affolter.ch/author/fab/" title="View all posts by Fabian Affolter">Fabian Affolter</a></span>			</div><!-- .entry-meta -->
			
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<p>Wie immer&#8230;gibt es nur selten zeitnah offizielle Updates für mein HTC One XL von meinem Provider. CyanogenMod ist mit Android 4.4.2 verfügbar. Ich will auch die volle Kontrolle über mein Telefon haben. Viele installierte Standard-Applikatione...</a></p>	
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		<td colspan="3" class="pad">&nbsp;</td><td>1</td><td><a href="https://blog.fabian-affolter.ch/2014/05/02/" aria-label="Posts published on May 2, 2014">2</a></td><td>3</td><td>4</td>
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		<td>5</td><td><a href="https://blog.fabian-affolter.ch/2014/05/06/" aria-label="Posts published on May 6, 2014">6</a></td><td>7</td><td>8</td><td>9</td><td>10</td><td>11</td>
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	</tr>
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		<td>19</td><td>20</td><td><a href="https://blog.fabian-affolter.ch/2014/05/21/" aria-label="Posts published on May 21, 2014">21</a></td><td>22</td><td>23</td><td>24</td><td>25</td>
	</tr>
	<tr>
		<td>26</td><td><a href="https://blog.fabian-affolter.ch/2014/05/27/" aria-label="Posts published on May 27, 2014">27</a></td><td>28</td><td>29</td><td>30</td><td>31</td>
		<td class="pad" colspan="1">&nbsp;</td>
	</tr>
	</tbody>
	</table></div></li><li id="categories-2" class="widget-container widget_categories"><h3 class="widget-title">Categories</h3>		<ul>
	<li class="cat-item cat-item-16"><a href="https://blog.fabian-affolter.ch/category/alpine-linux/" >Alpine Linux</a>
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	<li><a href='https://blog.fabian-affolter.ch/2007/12/'>December 2007</a>&nbsp;(19)</li>
	<li><a href='https://blog.fabian-affolter.ch/2007/11/'>November 2007</a>&nbsp;(27)</li>
	<li><a href='https://blog.fabian-affolter.ch/2007/10/'>October 2007</a>&nbsp;(36)</li>
	<li><a href='https://blog.fabian-affolter.ch/2007/09/'>September 2007</a>&nbsp;(26)</li>
	<li><a href='https://blog.fabian-affolter.ch/2007/08/'>August 2007</a>&nbsp;(27)</li>
	<li><a href='https://blog.fabian-affolter.ch/2007/07/'>July 2007</a>&nbsp;(32)</li>
	<li><a href='https://blog.fabian-affolter.ch/2007/06/'>June 2007</a>&nbsp;(28)</li>
	<li><a href='https://blog.fabian-affolter.ch/2007/05/'>May 2007</a>&nbsp;(32)</li>
	<li><a href='https://blog.fabian-affolter.ch/2007/04/'>April 2007</a>&nbsp;(17)</li>
	<li><a href='https://blog.fabian-affolter.ch/2007/03/'>March 2007</a>&nbsp;(13)</li>
	<li><a href='https://blog.fabian-affolter.ch/2007/02/'>February 2007</a>&nbsp;(5)</li>
	<li><a href='https://blog.fabian-affolter.ch/2007/01/'>January 2007</a>&nbsp;(2)</li>
	<li><a href='https://blog.fabian-affolter.ch/2006/11/'>November 2006</a>&nbsp;(4)</li>
	<li><a href='https://blog.fabian-affolter.ch/2006/10/'>October 2006</a>&nbsp;(7)</li>
	<li><a href='https://blog.fabian-affolter.ch/2006/09/'>September 2006</a>&nbsp;(7)</li>
	<li><a href='https://blog.fabian-affolter.ch/2006/08/'>August 2006</a>&nbsp;(2)</li>
	<li><a href='https://blog.fabian-affolter.ch/2006/07/'>July 2006</a>&nbsp;(1)</li>
	<li><a href='https://blog.fabian-affolter.ch/2006/06/'>June 2006</a>&nbsp;(3)</li>
	<li><a href='https://blog.fabian-affolter.ch/2006/05/'>May 2006</a>&nbsp;(5)</li>
	<li><a href='https://blog.fabian-affolter.ch/2006/04/'>April 2006</a>&nbsp;(3)</li>
	<li><a href='https://blog.fabian-affolter.ch/2006/03/'>March 2006</a>&nbsp;(2)</li>
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