<?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/
 * 
 *
*/

/**
 * UPnP port forwarding support. Only for Windows
 */
namespace pocketmine\network\upnp;

use pocketmine\utils\Utils;

abstract class UPnP{
	public static function PortForward($port){
		if(Utils::$online === \false){
			return \false;
		}
		if(Utils::getOS() != "win" or !\class_exists("COM")){
			return \false;
		}
		$port = (int) $port;
		$myLocalIP = \gethostbyname(\trim(`hostname`));
		try{
			$com = new \COM("HNetCfg.NATUPnP");
			if($com === \false or !\is_object($com->StaticPortMappingCollection)){
				return \false;
			}
			$com->StaticPortMappingCollection->Add($port, "UDP", $port, $myLocalIP, \true, "PocketMine-MP");
		}catch(\Exception $e){
			return \false;
		}

		return \true;
	}

	public static function RemovePortForward($port){
		if(Utils::$online === \false){
			return \false;
		}
		if(Utils::getOS() != "win" or !\class_exists("COM")){
			return \false;
		}
		$port = (int) $port;
		try{
			$com = new \COM("HNetCfg.NATUPnP") or \false;
			if($com === \false or !\is_object($com->StaticPortMappingCollection)){
				return \false;
			}
			$com->StaticPortMappingCollection->Remove($port, "UDP");
		}catch(\Exception $e){
			return \false;
		}

		return \true;
	}
}