<?
///////////////////////////////////////////////////////////////////////////
//
//    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>July 2009</span>			</h1>


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			<h2 class="entry-title"><a href="https://blog.fabian-affolter.ch/und-deshalb-ist-open-source-gut/" title="Permalink to Und deshalb ist Open Source gut" rel="bookmark">Und deshalb ist Open Source gut</a></h2>

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				<span class="meta-prep meta-prep-author">Posted on</span> <a href="https://blog.fabian-affolter.ch/und-deshalb-ist-open-source-gut/" title="16:01" rel="bookmark"><span class="entry-date">July 31, 2009</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>Wer Lizenzen für Software bezahlt, sollte die komplette Rechnung machen, nicht so wie eBay. Proprietäres Zeug wird so wie so früher oder später sterben, da ist Skype mit seinen 480 Millionen Benutzerkonten (wieviele sind da wohl aktiv?) schon mal...</a></p>	
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			<h2 class="entry-title"><a href="https://blog.fabian-affolter.ch/uuid-einer-festplatte/" title="Permalink to UUID einer Festplatte" rel="bookmark">UUID einer Festplatte</a></h2>

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				<span class="meta-prep meta-prep-author">Posted on</span> <a href="https://blog.fabian-affolter.ch/uuid-einer-festplatte/" title="14:57" rel="bookmark"><span class="entry-date">July 26, 2009</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>Das Ansprechen einer internen oder externen Festplatte mit ihrer UUID kann praktisch sein, aber wie kriege ich die UUID diesem Datenträgers. [crayon-6632708975cf7576074022/]Die Ausgabe sieht dann in etwa so aus. [crayon-6632708975cfb648592735/]...</a></p>	
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						<span class="entry-utility-prep entry-utility-prep-cat-links">Posted in</span> <a href="https://blog.fabian-affolter.ch/category/fedora/" rel="category tag">Fedora</a>					</span>
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			<h2 class="entry-title"><a href="https://blog.fabian-affolter.ch/echtzeituberwachung/" title="Permalink to Echtzeitüberwachung" rel="bookmark">Echtzeitüberwachung</a></h2>

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				<span class="meta-prep meta-prep-author">Posted on</span> <a href="https://blog.fabian-affolter.ch/echtzeituberwachung/" title="19:06" rel="bookmark"><span class="entry-date">July 15, 2009</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>Die neuen IP-Richtlinie lässt auch bei geringeren Delikte wie Betrug, Drohung gegen Beamte oder Landfriedensbruch eine Überwachung zu. Gegen mutmassliche Sozialhilfebetrüger oder vermutete Teilnehmer einer unbewilligten Demo könnten dann ebenfall...</a></p>	
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			<h2 class="entry-title"><a href="https://blog.fabian-affolter.ch/fruher-war-alles-besser/" title="Permalink to Früher war alles besser&#8230;" rel="bookmark">Früher war alles besser&#8230;</a></h2>

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				<span class="meta-prep meta-prep-author">Posted on</span> <a href="https://blog.fabian-affolter.ch/fruher-war-alles-besser/" title="17:12" rel="bookmark"><span class="entry-date">July 12, 2009</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>Manchmal kann ich nicht ganz verstehen, was der Sinn hinter etwas ist. Aus meiner Sicht ist es sinnlos in Nautilus die eingebundenen Dateisystemen anzuzeigen, denn ich kennen den Inhalt meines LVM schon und wenn sie nicht eingebunden wären, dann hä...</a></p>	
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		<td>6</td><td>7</td><td>8</td><td>9</td><td>10</td><td>11</td><td><a href="https://blog.fabian-affolter.ch/2009/07/12/" aria-label="Posts published on July 12, 2009">12</a></td>
	</tr>
	<tr>
		<td>13</td><td>14</td><td><a href="https://blog.fabian-affolter.ch/2009/07/15/" aria-label="Posts published on July 15, 2009">15</a></td><td>16</td><td>17</td><td>18</td><td>19</td>
	</tr>
	<tr>
		<td>20</td><td>21</td><td>22</td><td>23</td><td>24</td><td>25</td><td><a href="https://blog.fabian-affolter.ch/2009/07/26/" aria-label="Posts published on July 26, 2009">26</a></td>
	</tr>
	<tr>
		<td>27</td><td>28</td><td>29</td><td>30</td><td><a href="https://blog.fabian-affolter.ch/2009/07/31/" aria-label="Posts published on July 31, 2009">31</a></td>
		<td class="pad" colspan="2">&nbsp;</td>
	</tr>
	</tbody>
	</table></div></li><li id="categories-2" class="widget-container widget_categories"><h3 class="widget-title">Categories</h3>		<ul>
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