Added handling for unknown packets

src/pocketmine/network/mcpe/NetworkSession.php

@@ -93,6 +93,7 @@ use pocketmine\network\mcpe\protocol\StartGamePacket;
 use pocketmine\network\mcpe\protocol\TakeItemEntityPacket;
 use pocketmine\network\mcpe\protocol\TextPacket;
 use pocketmine\network\mcpe\protocol\TransferPacket;
+use pocketmine\network\mcpe\protocol\UnknownPacket;
 use pocketmine\network\mcpe\protocol\UpdateAttributesPacket;
 use pocketmine\network\mcpe\protocol\UpdateBlockPacket;
 use pocketmine\network\mcpe\protocol\UseItemPacket;
@@ -262,4 +263,6 @@ interface NetworkSession{
 	//public function handleResourcePackChunkRequest(ResourcePackChunkRequestPacket $packet) : bool; //TODO
 
 	public function handleTransfer(TransferPacket $packet) : bool;
+
+	public function handleUnknown(UnknownPacket $packet) : bool;
 }

src/pocketmine/network/mcpe/protocol/UnknownPacket.php

@@ -0,0 +1,53 @@
+<?php
+
+/*
+ *
+ *  ____            _        _   __  __ _                  __  __ ____
+ * |  _ \ ___   ___| | _____| |_|  \/  (_)_ __   ___      |  \/  |  _ \
+ * | |_) / _ \ / __| |/ / _ \ __| |\/| | | '_ \ / _ \_____| |\/| | |_) |
+ * |  __/ (_) | (__|   <  __/ |_| |  | | | | | |  __/_____| |  | |  __/
+ * |_|   \___/ \___|_|\_\___|\__|_|  |_|_|_| |_|\___|     |_|  |_|_|
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * @author PocketMine Team
+ * @link http://www.pocketmine.net/
+ *
+ *
+*/
+
+
+namespace pocketmine\network\mcpe\protocol;
+
+
+use pocketmine\network\mcpe\NetworkSession;
+
+class UnknownPacket extends DataPacket{
+	const NETWORK_ID = -1; //Invalid, do not try to write this
+
+	public $payload;
+
+	public function pid(){
+		if(strlen($this->payload ?? "") > 0){
+			return ord($this->payload{0});
+		}
+		return self::NETWORK_ID;
+	}
+
+	public function decode(){
+		$this->offset -= 1; //Rewind one byte so we can read the PID
+		$this->payload = $this->get(true);
+	}
+
+	public function encode(){
+		//Do not reset the buffer, this class does not have a valid NETWORK_ID constant.
+		$this->put($this->payload);
+	}
+
+	public function handle(NetworkSession $session) : bool{
+		return $session->handleUnknown($this);
+	}
+}