.
//
// 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($pos !== false) return true;
}
return false;
}
} // end of class DNSBL
?>
reprap – Christian Aurich
Yesterday I was coming home and a parcel from the USA was waiting for me – It was of course the kit of my 3D printer 🙂 I could not wait a second to start building it up. So here we are – the video shows about 8h in 3:20 minutes.
At some points you can see me confused for some time and putting unfinished modules aside. This is because a few parts were missing… John got back to me over the night and promised to send the missing parts out today. Well, that means I will wait for these parts to arrive for one or two weeks. In this time I can also order some other missing things like plugs for the motors and glue to hold the temperature sensor in place.
Here is a picture of the machine how it is looking at the moment – without any adjustments because I will have to take some parts out again:
Since a long time I wanted to have one of these fancy 3d printers like makerbot or reprap. I was spending quite a time searching for one that I could afford. Some weeks ago I heard of Makibox, which is quite exactly what I was looking for. It is affordable (350US$) for a student and on top of this it is a neat box that keeps your desktop clean.
Unfortunately it is sold by company like “kickstarter”, that is much less known and does only show a few projects hosted there that are all much cheaper than this 3d printer. Additionaly they seem to not be very open minded. I could not find any manuals or documentation regarding their printer. This was why I decided to ignore this great sounding offer, as I trust them less then for 350 US$.
Dissapointed about that I can not afford a 3d printer for quite a time I had some weeks not thinking about this as I had to write this semesters exams. The written exams were over last week, so I was looking for 3d printers again 😀 This time I found another great deal. It is the SeeMeCNC H1 printer, which is a reprap like machine. It looks like they did a great job in redesigning the printers to make them cost less. Still their machine looks solid and long-lasting compared to other constructions I’ve seen so far. The company manufaturing these bots put much more effort in the documentation and to build a community around the bot, which made me really happy as I saw what type of problems people had with this printers and how good they were helped.
The H1 can be shipped in 3 different combinations: only the Hardware, Hardware and Motors, Hardware and Motors and Electronics. I decided to not take their electronics as they use parallel port for printing. Instead I use the reprap generation 6 electronics. This is a massively compressed pcb, that holds all components you need on it. Unfortunately it is one of the most expensive parts of the printer with about 150€ for what I show in the picture below. The cost of the complete printer will be around 350-400€ – not including a power supply as I have one already.
Gen6 Electronics from cubic-print.com
I ordered this PCB at cubic-print.com (a germany based company) and they shipped it within 3 days, which I found surprisingly fast compared to some other orders I made in the last time. Thumbs up to the owner Wen Li. Now I am waiting for the printer itself coming from the US and the plastic coming from the UK. I will give a new update on this as soon as it arrives.
