102 lines
2.3 KiB
C#
102 lines
2.3 KiB
C#
#region Copyright & License Information
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/*
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* Copyright 2007-2021 The OpenRA Developers (see AUTHORS)
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* This file is part of OpenRA, which is free software. It is made
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* available to you under the terms of the GNU General Public License
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* as published by the Free Software Foundation, either version 3 of
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* the License, or (at your option) any later version. For more
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* information, see COPYING.
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*/
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#endregion
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using System;
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using System.Threading;
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using Mono.Nat;
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namespace OpenRA.Network
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{
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public enum NatStatus { Enabled, Disabled, NotSupported }
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public class Nat
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{
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public static NatStatus Status => NatUtility.IsSearching ? natDevice != null ? NatStatus.Enabled : NatStatus.NotSupported : NatStatus.Disabled;
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static Mapping mapping;
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static INatDevice natDevice;
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static bool initialized;
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public static void Initialize()
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{
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if (initialized)
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return;
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if (Game.Settings.Server.DiscoverNatDevices)
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{
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NatUtility.DeviceFound += DeviceFound;
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NatUtility.StartDiscovery();
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}
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initialized = true;
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}
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static readonly SemaphoreSlim Locker = new SemaphoreSlim(1, 1);
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static async void DeviceFound(object sender, DeviceEventArgs args)
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{
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await Locker.WaitAsync();
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try
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{
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// Only interact with one at a time. Some support both UPnP and NAT-PMP.
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natDevice = args.Device;
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Log.Write("nat", "Device found: {0}", natDevice.DeviceEndpoint);
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Log.Write("nat", "Type: {0}", natDevice.NatProtocol);
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}
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finally
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{
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Locker.Release();
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}
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}
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public static bool TryForwardPort(int listen, int external)
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{
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if (natDevice == null)
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return false;
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var lifetime = Game.Settings.Server.NatPortMappingLifetime;
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mapping = new Mapping(Protocol.Tcp, listen, external, lifetime, "OpenRA");
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try
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{
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natDevice.CreatePortMap(mapping);
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}
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catch (Exception e)
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{
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Console.WriteLine("Port forwarding failed: {0}", e.Message);
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Log.Write("nat", e.StackTrace);
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return false;
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}
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return true;
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}
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public static bool TryRemovePortForward()
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{
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if (natDevice == null)
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return false;
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try
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{
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natDevice.DeletePortMap(mapping);
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}
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catch (Exception e)
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{
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Console.WriteLine("Port removal failed: {0}", e.Message);
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Log.Write("nat", e.StackTrace);
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return false;
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}
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return true;
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}
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}
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}
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