54 lines
1.3 KiB
PHP
54 lines
1.3 KiB
PHP
<?php
|
|
|
|
class mcpi{
|
|
|
|
private const packet = "\x02\x00\x00\x00\x00\x00\x01\xbe\xdb\x00\xff\xff\x00\xfe\xfe\xfe\xfe\xfd\xfd\xfd\xfd\x12\x34\x56\x78";
|
|
|
|
public function ping(string $ip, int $port = 19132, int $timeout = 3){
|
|
|
|
if(!($sock = socket_create(AF_INET, SOCK_DGRAM, 0))){
|
|
|
|
throw new Exception("Failed to connect");
|
|
}
|
|
|
|
if(!socket_sendto($sock, mcpi::packet, strlen(mcpi::packet), 0, $ip, $port)){
|
|
|
|
throw new Exception("Failed to send data");
|
|
}
|
|
|
|
socket_set_option($sock, SOL_SOCKET, SO_RCVTIMEO, ["sec" => $timeout, "usec" => 0]);
|
|
|
|
// get string size
|
|
// for some reason, not using msg_peek makes the second
|
|
// socket_recv call hang
|
|
if(socket_recv($sock, $strlen, 36, MSG_PEEK | MSG_WAITALL) === false){
|
|
|
|
throw new Exception("Failed to receive datalen");
|
|
}
|
|
|
|
$strlen = unpack("c", substr($strlen, 34, 35))[1];
|
|
|
|
if(socket_recv($sock, $reply, (35 + $strlen), MSG_WAITALL) === false){
|
|
|
|
throw new Exception("Failed to receive string");
|
|
}
|
|
|
|
$reply = substr($reply, 35, (35 + $strlen));
|
|
|
|
$reply = explode(";", $reply);
|
|
|
|
if(count($reply) !== 3){
|
|
|
|
throw new Exception("Received malformed string");
|
|
}
|
|
|
|
$reply = [
|
|
"game" => $reply[0],
|
|
"type" => $reply[1],
|
|
"name" => $reply[2]
|
|
];
|
|
|
|
return $reply;
|
|
}
|
|
}
|