Added new events for network interface handling, close #1232 (#1250)

Added 
- NetworkInterfaceRegisterEvent (cancellable)
- NetworkInterfaceUnregisterEvent
- NetworkInterfaceCrashEvent

src/pocketmine/Server.php

@@ -1613,7 +1613,6 @@ class Server{
 			register_shutdown_function([$this, "crashDump"]);
 
 			$this->queryRegenerateTask = new QueryRegenerateEvent($this, 5);
-			$this->network->registerInterface(new RakLibInterface($this));
 
 			$this->pluginManager->loadPlugins($this->pluginPath);
 
@@ -1621,6 +1620,9 @@ class Server{
 
 			$this->enablePlugins(PluginLoadOrder::STARTUP);
 
+			$this->network->registerInterface(new RakLibInterface($this));
+
+
 			LevelProviderManager::addProvider(Anvil::class);
 			LevelProviderManager::addProvider(McRegion::class);
 			LevelProviderManager::addProvider(PMAnvil::class);

src/pocketmine/event/server/NetworkInterfaceCrashEvent.php

@@ -0,0 +1,50 @@
+<?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\network\SourceInterface;
+
+/**
+ * Called when a network interface crashes, with relevant crash information.
+ */
+class NetworkInterfaceCrashEvent extends NetworkInterfaceEvent{
+	public static $handlerList = null;
+
+	/**
+	 * @var \Throwable
+	 */
+	private $exception;
+
+	public function __construct(SourceInterface $interface, \Throwable $throwable){
+		parent::__construct($interface);
+		$this->exception = $throwable;
+	}
+
+	/**
+	 * @return \Throwable
+	 */
+	public function getCrashInformation() : \Throwable{
+		return $this->exception;
+	}
+}

src/pocketmine/event/server/NetworkInterfaceEvent.php

@@ -0,0 +1,45 @@
+<?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\network\SourceInterface;
+
+class NetworkInterfaceEvent extends ServerEvent{
+	/** @var SourceInterface */
+	protected $interface;
+
+	/**
+	 * @param SourceInterface $interface
+	 */
+	public function __construct(SourceInterface $interface){
+		$this->interface = $interface;
+	}
+
+	/**
+	 * @return SourceInterface
+	 */
+	public function getInterface() : SourceInterface{
+		return $this->interface;
+	}
+}

src/pocketmine/event/server/NetworkInterfaceRegisterEvent.php

@@ -0,0 +1,35 @@
+<?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\network\SourceInterface;
+
+/**
+ * Called when a network interface is registered into the network, for example the RakLib interface.
+ */
+class NetworkInterfaceRegisterEvent extends NetworkInterfaceEvent implements Cancellable{
+	public static $handlerList = null;
+
+}

src/pocketmine/event/server/NetworkInterfaceUnregisterEvent.php

@@ -0,0 +1,32 @@
+<?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;
+
+/**
+ * Called when a network interface is unregistered
+ */
+class NetworkInterfaceUnregisterEvent extends NetworkInterfaceEvent{
+	public static $handlerList = null;
+
+}

src/pocketmine/network/Network.php

@@ -26,6 +26,9 @@ declare(strict_types=1);
  */
 namespace pocketmine\network;
 
+use pocketmine\event\server\NetworkInterfaceCrashEvent;
+use pocketmine\event\server\NetworkInterfaceRegisterEvent;
+use pocketmine\event\server\NetworkInterfaceUnregisterEvent;
 use pocketmine\network\mcpe\protocol\PacketPool;
 use pocketmine\Server;
 
@@ -90,6 +93,8 @@ class Network{
 					$logger->logException($e);
 				}
 
+				$this->server->getPluginManager()->callEvent(new NetworkInterfaceCrashEvent($interface, $e));
+
 				$interface->emergencyShutdown();
 				$this->unregisterInterface($interface);
 				$logger->critical($this->server->getLanguage()->translateString("pocketmine.server.networkError", [get_class($interface), $e->getMessage()]));
@@ -101,20 +106,24 @@ class Network{
 	 * @param SourceInterface $interface
 	 */
 	public function registerInterface(SourceInterface $interface){
-		$this->interfaces[$hash = spl_object_hash($interface)] = $interface;
-		if($interface instanceof AdvancedSourceInterface){
-			$this->advancedInterfaces[$hash] = $interface;
-			$interface->setNetwork($this);
+		$this->server->getPluginManager()->callEvent($ev = new NetworkInterfaceRegisterEvent($interface));
+		if(!$ev->isCancelled()){
+			$interface->start();
+			$this->interfaces[$hash = spl_object_hash($interface)] = $interface;
+			if($interface instanceof AdvancedSourceInterface){
+				$this->advancedInterfaces[$hash] = $interface;
+				$interface->setNetwork($this);
+			}
+			$interface->setName($this->name);
 		}
-		$interface->setName($this->name);
 	}
 
 	/**
 	 * @param SourceInterface $interface
 	 */
 	public function unregisterInterface(SourceInterface $interface){
-		unset($this->interfaces[$hash = spl_object_hash($interface)],
-			$this->advancedInterfaces[$hash]);
+		$this->server->getPluginManager()->callEvent(new NetworkInterfaceUnregisterEvent($interface));
+		unset($this->interfaces[$hash = spl_object_hash($interface)], $this->advancedInterfaces[$hash]);
 	}
 
 	/**

src/pocketmine/network/SourceInterface.php

@@ -34,6 +34,11 @@ use pocketmine\Player;
  */
 interface SourceInterface{
 
+	/**
+	 * Performs actions needed to start the interface after it is registered.
+	 */
+	public function start();
+
 	/**
 	 * Sends a DataPacket to the interface, returns an unique identifier for the packet if $needACK is true
 	 *

src/pocketmine/network/mcpe/RakLibInterface.php

@@ -67,10 +67,14 @@ class RakLibInterface implements ServerInstance, AdvancedSourceInterface{
 		$this->server = $server;
 		$this->identifiers = [];
 
-		$this->rakLib = new RakLibServer($this->server->getLogger(), $this->server->getLoader(), $this->server->getPort(), $this->server->getIp() === "" ? "0.0.0.0" : $this->server->getIp());
+		$this->rakLib = new RakLibServer($this->server->getLogger(), $this->server->getLoader(), $this->server->getPort(), $this->server->getIp() === "" ? "0.0.0.0" : $this->server->getIp(), false);
 		$this->interface = new ServerHandler($this->rakLib, $this);
 	}
 
+	public function start(){
+		$this->rakLib->start();
+	}
+
 	public function setNetwork(Network $network){
 		$this->network = $network;
 	}