mcpi-ping/mcpi.php

54 lines
1.3 KiB
PHP
Raw Normal View History

2023-07-22 18:43:50 +00:00
<?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;
}
}