PocketMine-MP/src/network/Network.php
2022-12-28 20:42:33 +00:00

217 lines
6.1 KiB
PHP

<?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);
/**
* Network-related classes
*/
namespace pocketmine\network;
use pocketmine\event\server\NetworkInterfaceRegisterEvent;
use pocketmine\event\server\NetworkInterfaceUnregisterEvent;
use pocketmine\utils\Utils;
use function base64_encode;
use function get_class;
use function preg_match;
use function spl_object_id;
use function time;
use const PHP_INT_MAX;
class Network{
/** @var NetworkInterface[] */
private array $interfaces = [];
/** @var AdvancedNetworkInterface[] */
private array $advancedInterfaces = [];
/** @var RawPacketHandler[] */
private array $rawPacketHandlers = [];
/**
* @var int[]
* @phpstan-var array<string, int>
*/
private array $bannedIps = [];
private BidirectionalBandwidthStatsTracker $bandwidthTracker;
private string $name;
private NetworkSessionManager $sessionManager;
public function __construct(
private \Logger $logger
){
$this->sessionManager = new NetworkSessionManager();
$this->bandwidthTracker = new BidirectionalBandwidthStatsTracker(5);
}
public function getBandwidthTracker() : BidirectionalBandwidthStatsTracker{ return $this->bandwidthTracker; }
/**
* @return NetworkInterface[]
*/
public function getInterfaces() : array{
return $this->interfaces;
}
public function getSessionManager() : NetworkSessionManager{
return $this->sessionManager;
}
public function getConnectionCount() : int{
return $this->sessionManager->getSessionCount();
}
public function getValidConnectionCount() : int{
return $this->sessionManager->getValidSessionCount();
}
public function tick() : void{
foreach($this->interfaces as $interface){
$interface->tick();
}
$this->sessionManager->tick();
}
/**
* @throws NetworkInterfaceStartException
*/
public function registerInterface(NetworkInterface $interface) : bool{
$ev = new NetworkInterfaceRegisterEvent($interface);
$ev->call();
if(!$ev->isCancelled()){
$interface->start();
$this->interfaces[$hash = spl_object_id($interface)] = $interface;
if($interface instanceof AdvancedNetworkInterface){
$this->advancedInterfaces[$hash] = $interface;
$interface->setNetwork($this);
foreach(Utils::stringifyKeys($this->bannedIps) as $ip => $until){
$interface->blockAddress($ip);
}
foreach($this->rawPacketHandlers as $handler){
$interface->addRawPacketFilter($handler->getPattern());
}
}
$interface->setName($this->name);
return true;
}
return false;
}
/**
* @throws \InvalidArgumentException
*/
public function unregisterInterface(NetworkInterface $interface) : void{
if(!isset($this->interfaces[$hash = spl_object_id($interface)])){
throw new \InvalidArgumentException("Interface " . get_class($interface) . " is not registered on this network");
}
(new NetworkInterfaceUnregisterEvent($interface))->call();
unset($this->interfaces[$hash], $this->advancedInterfaces[$hash]);
$interface->shutdown();
}
/**
* Sets the server name shown on each interface Query
*/
public function setName(string $name) : void{
$this->name = $name;
foreach($this->interfaces as $interface){
$interface->setName($this->name);
}
}
public function getName() : string{
return $this->name;
}
public function updateName() : void{
foreach($this->interfaces as $interface){
$interface->setName($this->name);
}
}
public function sendPacket(string $address, int $port, string $payload) : void{
foreach($this->advancedInterfaces as $interface){
$interface->sendRawPacket($address, $port, $payload);
}
}
/**
* Blocks an IP address from the main interface. Setting timeout to -1 will block it forever
*/
public function blockAddress(string $address, int $timeout = 300) : void{
$this->bannedIps[$address] = $timeout > 0 ? time() + $timeout : PHP_INT_MAX;
foreach($this->advancedInterfaces as $interface){
$interface->blockAddress($address, $timeout);
}
}
public function unblockAddress(string $address) : void{
unset($this->bannedIps[$address]);
foreach($this->advancedInterfaces as $interface){
$interface->unblockAddress($address);
}
}
/**
* Registers a raw packet handler on the network.
*/
public function registerRawPacketHandler(RawPacketHandler $handler) : void{
$this->rawPacketHandlers[spl_object_id($handler)] = $handler;
$regex = $handler->getPattern();
foreach($this->advancedInterfaces as $interface){
$interface->addRawPacketFilter($regex);
}
}
/**
* Unregisters a previously-registered raw packet handler.
*/
public function unregisterRawPacketHandler(RawPacketHandler $handler) : void{
unset($this->rawPacketHandlers[spl_object_id($handler)]);
}
public function processRawPacket(AdvancedNetworkInterface $interface, string $address, int $port, string $packet) : void{
if(isset($this->bannedIps[$address]) && time() < $this->bannedIps[$address]){
$this->logger->debug("Dropped raw packet from banned address $address $port");
return;
}
$handled = false;
foreach($this->rawPacketHandlers as $handler){
if(preg_match($handler->getPattern(), $packet) === 1){
try{
$handled = $handler->handle($interface, $address, $port, $packet);
}catch(PacketHandlingException $e){
$handled = true;
$this->logger->error("Bad raw packet from /$address:$port: " . $e->getMessage());
$this->blockAddress($address, 600);
break;
}
}
}
if(!$handled){
$this->logger->debug("Unhandled raw packet from /$address:$port: " . base64_encode($packet));
}
}
}