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<?php | |
/** | |
* This is a PHP client for the Pokemon Online server registry. | |
* Call PORegistry::getServerList() to retrieve the list as an array. | |
* | |
* @author Cathy J. Fitzpatrick <cathy@cathyjf.com> | |
* @licence public domain | |
*/ | |
class POBuffer { | |
private $buffer; | |
private $pointer = 0; | |
public function __construct($buffer) { | |
$this->buffer = $buffer; | |
} | |
private function read($bytes) { | |
$d = substr($this->buffer, $this->pointer, $bytes); | |
$this->pointer += $bytes; | |
return $d; | |
} | |
private function unpack($bytes, $pattern) { | |
$d = $this->read($bytes); | |
$arr = unpack($pattern . 'x', $d); | |
return $arr['x']; | |
} | |
public function readquint8() { | |
return $this->unpack(1, 'C'); | |
} | |
public function readquint16() { | |
return $this->unpack(2, 'n'); | |
} | |
public function readquint32() { | |
return $this->unpack(4, 'N'); | |
} | |
public function readQString() { | |
$length = $this->readquint32(); | |
$data = $this->read($length); | |
return utf8_decode($data); | |
} | |
} | |
class POClient { | |
private $socket; | |
public function __construct($host, $port) { | |
$this->socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP); | |
if (!$this->socket) throw new Exception('Could not create socket'); | |
$ip = gethostbyname($host); | |
if (!$ip) throw new Exception('Could not resolve hostname'); | |
$res = socket_connect($this->socket, $ip, $port); | |
if (!$res) throw new Exception('Could not establish connection'); | |
} | |
public function recvfully($bytes) { | |
$received = 0; | |
$ret = ''; | |
while ($received < $bytes) { | |
$buf = ''; | |
$b = socket_recv($this->socket, $buf, $bytes - $received, MSG_WAITALL); | |
if ($b === FALSE) return FALSE; | |
$received += $b; | |
$ret .= $buf; | |
} | |
return new POBuffer($ret); | |
} | |
public function recvmessage() { | |
$header = $this->recvfully(4); | |
if ($header === FALSE) return FALSE; | |
$length = $header->readquint32(); | |
return $this->recvfully($length); | |
} | |
public function disconnect() { | |
socket_close($this->socket); | |
} | |
} | |
class PORegistry { | |
public static function getServerList() { | |
$client = new POClient('registry.pokemon-online.eu', 5090); | |
$active = true; | |
$servers = array(); | |
while ($active && ($msg = $client->recvmessage())) { | |
// message type constants are defined in `src/Shared/networkcommands.h` | |
$type = $msg->readquint8(); | |
switch ($type) { | |
case 38: // Announcement | |
// ignore this | |
break; | |
case 5: // PlayersList (server entry) | |
// these array index names are copied from the PO source code | |
$entry = array(); | |
$entry['name'] = $msg->readQString(); | |
$entry['desc'] = $msg->readQString(); | |
$entry['numplayers'] = $msg->readquint16(); | |
$entry['ip'] = $msg->readQString(); | |
$entry['max'] = $msg->readquint16(); | |
$entry['port'] = $msg->readquint16(); | |
$entry['passwordProtected'] = !!$msg->readquint8(); | |
$servers[] = $entry; | |
break; | |
case 57: // ServerListEnd | |
$active = false; | |
break; | |
} | |
} | |
$client->disconnect(); | |
usort($servers, function(&$a, &$b) { | |
return $b['numplayers'] - $a['numplayers']; | |
}); | |
return $servers; | |
} | |
public static function updateUserStats() { | |
global $db; | |
$servers = array(); | |
try { | |
$servers = PORegistry::getServerList(); | |
} catch (Exception $e) {} | |
if (count($servers) === 0) return; | |
$maxusers = $servers[0]['numplayers']; | |
$time = time() * 1000; | |
$db->query("INSERT INTO `ntbb_userstatshistory` (`date`, `usercount`, `programid`) VALUES ('" . $db->escape($time) . "', '" . $db->escape($maxusers) . "', 'po')"); | |
} | |
} |
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