#2 Fix!

LiveSigns/src/aliuly/livesigns/common/getMotd.php

@@ -0,0 +1,78 @@
+<?php
+
+namespace aliuly\livesigns\common;
+use pocketmine\utils\Binary;
+
+/**
+ * Get MOTD style data from Minecraft PE servers
+ */
+abstract class GetMotd {
+  /** @const str - Magic string */
+  const MAGIC = "\x00\xff\xff\x00\xfe\xfe\xfe\xfe\xfd\xfd\xfd\xfd\x12\x34\x56\x78";
+  /** @const int - Ping Open connection packet id */
+	const PING_OPEN_CONNECTION = 0x01;
+  /** @const int - Pong Open connection packet id */
+	const PONG_OPEN_CONNECTION = 0x1c;
+	/** Query server
+	 * @param str $Ip - IP or hostname to query
+	 * @param int $Port - Port to connect to
+	 * @param int $Timeout - Timeout in seconds
+	 * @return str|array - string with error on array with results
+	 */
+	static public function query( $Ip, $Port = 19132, $Timeout = 3 ) {
+		if( !is_int( $Timeout ) || $Timeout < 0 )	return "Invalid timeout value";
+		$sock = @fsockopen( 'udp://' . $Ip, (int)$Port, $ErrNo, $ErrStr, $Timeout );
+
+		if( $ErrNo || $sock === false ) return "socket error: " . $ErrStr;
+		Stream_Set_Timeout( $sock, $Timeout );
+		Stream_Set_Blocking( $sock, true );
+
+		$res = self::pingServer($sock);
+		fclose($sock);
+		return $res;
+	}
+  /**
+   * Run protocol to get MOTD data
+   *
+   * @param resource $sock
+   * @return str|array - string with error or array with results
+   */
+	static protected function pingServer($sock) {
+		$pkt = chr(self::PING_OPEN_CONNECTION).
+					Binary::writeLong(microtime(true)*1000).
+					self::MAGIC;
+		$len  = strlen($pkt);
+		if ($len !== fwrite($sock,$pkt,$len)) return "error writing socket";
+		$reply = fread( $sock, 4096 );
+		if ($reply === false) return "error reading socket";
+		/*
+			0 - id
+			1 - ping-id
+			9 - server-id
+			17 - magic
+			33 - string Length
+			35 - payload Length
+			37 - payload string
+			*/
+		if (strlen($reply) < 35
+				|| $reply{0} != chr(self::PONG_OPEN_CONNECTION)
+				|| substr($reply,17,16) != self::MAGIC) return "invalid response";
+		$res = [
+			"latency" => intval(microtime(true)*1000 - Binary::readLong(substr($reply,1,8))),
+			"serverId" => Binary::readLong(substr($reply,9,8)),
+		];
+		$plen = Binary::readShort(substr($reply,35,2));
+		$payload = substr($reply,37);
+		if (strlen($payload) > $plen) $payload = substr($payload,$plen);
+		$val = explode(";",$payload);
+    foreach (["mccpp", "motd", "protocol", "client-version", "players",
+              "max-players"] as $i) {
+      if (count($val)) {
+        $res[$i] = array_shift($val);
+      } else {
+        break;
+      }
+    }
+		return $res;
+	}
+}