Merge branch 'minor-next' of github.com:pmmp/PocketMine-MP into minor-next

src/event/server/DataPacketPreReceiveEvent.php

@@ -0,0 +1,54 @@
+<?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/
+ *
+ *
+ */
+
+declare(strict_types=1);
+
+namespace pocketmine\event\server;
+
+use pocketmine\event\Cancellable;
+use pocketmine\event\CancellableTrait;
+use pocketmine\network\mcpe\NetworkSession;
+
+/**
+ * Called before a packet is decoded and handled by the network session.
+ * Cancelling this event will drop the packet without decoding it, minimizing wasted CPU time.
+ */
+class DataPacketPreReceiveEvent extends ServerEvent implements Cancellable{
+	use CancellableTrait;
+
+	public function __construct(
+		private NetworkSession $origin,
+		private int $packetId,
+		private string $packetBuffer
+	){}
+
+	public function getOrigin() : NetworkSession{
+		return $this->origin;
+	}
+
+	public function getPacketId() : int{
+		return $this->packetId;
+	}
+
+	public function getPacketBuffer() : string{
+		return $this->packetBuffer;
+	}
+}

src/network/mcpe/NetworkSession.php

@@ -25,6 +25,7 @@ namespace pocketmine\network\mcpe;
 
 use pocketmine\entity\effect\EffectInstance;
 use pocketmine\event\player\PlayerDuplicateLoginEvent;
+use pocketmine\event\server\DataPacketPreReceiveEvent;
 use pocketmine\event\server\DataPacketReceiveEvent;
 use pocketmine\event\server\DataPacketSendEvent;
 use pocketmine\form\Form;
@@ -412,6 +413,12 @@ class NetworkSession{
 		$timings->startTiming();
 
 		try{
+			$ev = new DataPacketPreReceiveEvent($this, $packet->pid(), $buffer);
+			$ev->call();
+			if($ev->isCancelled()){
+				return;
+			}
+
 			$decodeTimings = Timings::getDecodeDataPacketTimings($packet);
 			$decodeTimings->startTiming();
 			try{