. // // 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 ?> octubre 27, 2010

Daily Archives octubre 27, 2010

VoIP, a por Facebook

Facebook está últimamente en el punto de mira de muchos intereses: negocios, fallas de seguridad, cine… y ahora se une otro sector, VoIP.

En Facebook queda todavía un mundo por explotar económicamente, se empezaron por los juegos tipo Farmville el cual mueve una cantidad ingente de ingresos por el simple hecho de estar ahí.

No ha...

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