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using MediaBrowser.Controller;
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using MediaBrowser.Controller.Configuration;
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using MediaBrowser.Controller.Plugins;
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using MediaBrowser.Model.Logging;
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using Mono.Nat;
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using System;
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using System.IO;
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using System.Text;
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namespace MediaBrowser.Server.Implementations.EntryPoints
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{
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public class ExternalPortForwarding : IServerEntryPoint
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{
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private readonly IServerApplicationHost _appHost;
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private readonly ILogger _logger;
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private readonly IServerConfigurationManager _config;
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private bool _isStarted;
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public ExternalPortForwarding(ILogger logger, IServerApplicationHost appHost, IServerConfigurationManager config)
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{
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_logger = logger;
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_appHost = appHost;
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_config = config;
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_config.ConfigurationUpdated += _config_ConfigurationUpdated;
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}
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void _config_ConfigurationUpdated(object sender, EventArgs e)
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{
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var enable = _config.Configuration.EnableUPnP;
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if (enable && !_isStarted)
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{
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Reload();
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}
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else if (!enable && _isStarted)
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{
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DisposeNat();
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}
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}
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public void Run()
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{
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NatUtility.Logger = new LogWriter(_logger);
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Reload();
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}
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private void Reload()
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{
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if (_config.Configuration.EnableUPnP)
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{
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_logger.Debug("Starting NAT discovery");
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NatUtility.DeviceFound += NatUtility_DeviceFound;
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NatUtility.DeviceLost += NatUtility_DeviceLost;
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NatUtility.UnhandledException += NatUtility_UnhandledException;
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NatUtility.StartDiscovery();
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_isStarted = true;
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}
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}
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void NatUtility_UnhandledException(object sender, UnhandledExceptionEventArgs e)
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{
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var ex = e.ExceptionObject as Exception;
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if (ex == null)
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{
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_logger.Error("Unidentified error reported by Mono.Nat");
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}
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else
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{
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// Seeing some blank exceptions coming through here
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_logger.ErrorException("Error reported by Mono.Nat: ", ex);
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}
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}
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void NatUtility_DeviceFound(object sender, DeviceEventArgs e)
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{
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try
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{
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var device = e.Device;
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_logger.Debug("NAT device found: {0}", device.LocalAddress.ToString());
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CreateRules(device);
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}
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catch (Exception ex)
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{
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_logger.ErrorException("Error creating port forwarding rules", ex);
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}
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}
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private void CreateRules(INatDevice device)
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{
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var info = _appHost.GetSystemInfo();
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CreatePortMap(device, info.HttpServerPortNumber);
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if (info.WebSocketPortNumber != info.HttpServerPortNumber)
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{
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CreatePortMap(device, info.WebSocketPortNumber);
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}
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}
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private void CreatePortMap(INatDevice device, int port)
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{
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_logger.Info("Creating port map on port {0}", port);
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device.CreatePortMap(new Mapping(Protocol.Tcp, port, port)
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{
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Description = "Media Browser Server"
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});
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}
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void NatUtility_DeviceLost(object sender, DeviceEventArgs e)
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{
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var device = e.Device;
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_logger.Debug("NAT device lost: {0}", device.LocalAddress.ToString());
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}
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public void Dispose()
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{
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DisposeNat();
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}
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private void DisposeNat()
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{
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_logger.Debug("Stopping NAT discovery");
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try
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{
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NatUtility.DeviceFound -= NatUtility_DeviceFound;
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NatUtility.DeviceLost -= NatUtility_DeviceLost;
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NatUtility.UnhandledException -= NatUtility_UnhandledException;
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NatUtility.StopDiscovery();
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}
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catch (Exception ex)
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{
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_logger.ErrorException("Error stopping NAT Discovery", ex);
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}
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finally
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{
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_isStarted = false;
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}
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}
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private class LogWriter : TextWriter
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{
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private readonly ILogger _logger;
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public LogWriter(ILogger logger)
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{
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_logger = logger;
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}
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public override Encoding Encoding
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{
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get { return Encoding.UTF8; }
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}
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public override void WriteLine(string format, params object[] arg)
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{
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_logger.Debug(format, arg);
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}
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public override void WriteLine(string value)
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{
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_logger.Debug(value);
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}
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}
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}
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}
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Luke Pulverenti
10 years ago