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Merge pull request #1628 from MediaBrowser/dev

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Dev
This commit is contained in:
Luke 2016-04-04 15:17:02 -04:00
commit 2d41760370
3 changed files with 165 additions and 70 deletions
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230
MediaBrowser.Server.Implementations/EntryPoints/ExternalPortForwarding.cs
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@ -3,6 +3,7 @@ using MediaBrowser.Controller.Configuration;
using MediaBrowser.Controller.Dlna;
using MediaBrowser.Controller.Plugins;
using MediaBrowser.Model.Logging;
using Mono.Nat;
using System;
using System.Collections.Generic;
using System.Globalization;
@ -10,9 +11,6 @@ using System.IO;
using System.Net;
using System.Text;
using MediaBrowser.Common.Threading;
using Open.Nat;
using System.Threading;
using System.Threading.Tasks;
namespace MediaBrowser.Server.Implementations.EntryPoints
{
@ -22,8 +20,9 @@ namespace MediaBrowser.Server.Implementations.EntryPoints
private readonly ILogger _logger;
private readonly IServerConfigurationManager _config;
private readonly ISsdpHandler _ssdp;
private CancellationTokenSource _currentCancellationTokenSource;
private TimeSpan _interval = TimeSpan.FromHours(1);
private PeriodicTimer _timer;
private bool _isStarted;
public ExternalPortForwarding(ILogManager logmanager, IServerApplicationHost appHost, IServerConfigurationManager config, ISsdpHandler ssdp)
{
@ -31,78 +30,157 @@ namespace MediaBrowser.Server.Implementations.EntryPoints
_appHost = appHost;
_config = config;
_ssdp = ssdp;
_config.ConfigurationUpdated += _config_ConfigurationUpdated;
}
private void _config_ConfigurationUpdated(object sender, EventArgs e)
private string _lastConfigIdentifier;
private string GetConfigIdentifier()
{
var values = new List<string>();
var config = _config.Configuration;
values.Add(config.EnableUPnP.ToString());
values.Add(config.PublicPort.ToString(CultureInfo.InvariantCulture));
values.Add(_appHost.HttpPort.ToString(CultureInfo.InvariantCulture));
values.Add(_appHost.HttpsPort.ToString(CultureInfo.InvariantCulture));
values.Add(config.EnableHttps.ToString());
values.Add(_appHost.EnableHttps.ToString());
return string.Join("|", values.ToArray());
}
void _config_ConfigurationUpdated(object sender, EventArgs e)
{
if (!string.Equals(_lastConfigIdentifier, GetConfigIdentifier(), StringComparison.OrdinalIgnoreCase))
{
if (_isStarted)
{
DisposeNat();
}
Run();
}
}
public void Run()
{
Discover();
}
private async void Discover()
{
if (!_config.Configuration.EnableUPnP)
{
return;
}
var discoverer = new NatDiscoverer();
var cancellationTokenSource = new CancellationTokenSource(10000);
_currentCancellationTokenSource = cancellationTokenSource;
try
{
var device = await discoverer.DiscoverDeviceAsync(PortMapper.Upnp, cancellationTokenSource).ConfigureAwait(false);
await CreateRules(device).ConfigureAwait(false);
}
catch (OperationCanceledException)
{
}
catch (Exception ex)
{
_logger.ErrorException("Error discovering NAT devices", ex);
}
finally
{
_currentCancellationTokenSource = null;
}
//NatUtility.Logger = new LogWriter(_logger);
if (_config.Configuration.EnableUPnP)
{
await Task.Delay(_interval).ConfigureAwait(false);
Discover();
Start();
}
_config.ConfigurationUpdated -= _config_ConfigurationUpdated;
_config.ConfigurationUpdated += _config_ConfigurationUpdated;
}
private void Start()
{
_logger.Debug("Starting NAT discovery");
NatUtility.EnabledProtocols = new List<NatProtocol>
{
NatProtocol.Pmp
};
NatUtility.DeviceFound += NatUtility_DeviceFound;
// Mono.Nat does never rise this event. The event is there however it is useless.
// You could remove it with no risk.
NatUtility.DeviceLost += NatUtility_DeviceLost;
// it is hard to say what one should do when an unhandled exception is raised
// because there isn't anything one can do about it. Probably save a log or ignored it.
NatUtility.UnhandledException += NatUtility_UnhandledException;
NatUtility.StartDiscovery();
_timer = new PeriodicTimer(s => _createdRules = new List<string>(), null, TimeSpan.FromMinutes(5), TimeSpan.FromMinutes(5));
_ssdp.MessageReceived += _ssdp_MessageReceived;
_lastConfigIdentifier = GetConfigIdentifier();
_isStarted = true;
}
void _ssdp_MessageReceived(object sender, SsdpMessageEventArgs e)
{
var endpoint = e.EndPoint as IPEndPoint;
if (endpoint != null && e.LocalEndPoint != null)
{
NatUtility.Handle(e.LocalEndPoint.Address, e.Message, endpoint, NatProtocol.Upnp);
}
}
private async Task CreateRules(NatDevice device)
void NatUtility_UnhandledException(object sender, UnhandledExceptionEventArgs e)
{
var ex = e.ExceptionObject as Exception;
if (ex == null)
{
//_logger.Error("Unidentified error reported by Mono.Nat");
}
else
{
// Seeing some blank exceptions coming through here
//_logger.ErrorException("Error reported by Mono.Nat: ", ex);
}
}
void NatUtility_DeviceFound(object sender, DeviceEventArgs e)
{
try
{
var device = e.Device;
_logger.Debug("NAT device found: {0}", device.LocalAddress.ToString());
CreateRules(device);
}
catch (Exception ex)
{
// I think it could be a good idea to log the exception because
// you are using permanent portmapping here (never expire) and that means that next time
// CreatePortMap is invoked it can fails with a 718-ConflictInMappingEntry or not. That depends
// on the router's upnp implementation (specs says it should fail however some routers don't do it)
// It also can fail with others like 727-ExternalPortOnlySupportsWildcard, 728-NoPortMapsAvailable
// and those errors (upnp errors) could be useful for diagnosting.
// Commenting out because users are reporting problems out of our control
//_logger.ErrorException("Error creating port forwarding rules", ex);
}
}
private List<string> _createdRules = new List<string>();
private void CreateRules(INatDevice device)
{
// On some systems the device discovered event seems to fire repeatedly
// This check will help ensure we're not trying to port map the same device over and over
await CreatePortMap(device, _appHost.HttpPort, _config.Configuration.PublicPort).ConfigureAwait(false);
await CreatePortMap(device, _appHost.HttpsPort, _config.Configuration.PublicHttpsPort).ConfigureAwait(false);
var address = device.LocalAddress.ToString();
if (!_createdRules.Contains(address))
{
_createdRules.Add(address);
CreatePortMap(device, _appHost.HttpPort, _config.Configuration.PublicPort);
CreatePortMap(device, _appHost.HttpsPort, _config.Configuration.PublicHttpsPort);
}
}
private async Task CreatePortMap(NatDevice device, int privatePort, int publicPort)
private void CreatePortMap(INatDevice device, int privatePort, int publicPort)
{
_logger.Debug("Creating port map on port {0}", privatePort);
device.CreatePortMap(new Mapping(Protocol.Tcp, privatePort, publicPort)
{
Description = _appHost.Name
});
}
try
{
await device.CreatePortMapAsync(new Mapping(Protocol.Tcp, privatePort, publicPort, _appHost.Name)).ConfigureAwait(false);
}
catch (Exception ex)
{
_logger.ErrorException("Error creating port map", ex);
}
// As I said before, this method will be never invoked. You can remove it.
void NatUtility_DeviceLost(object sender, DeviceEventArgs e)
{
var device = e.Device;
_logger.Debug("NAT device lost: {0}", device.LocalAddress.ToString());
}
public void Dispose()
@ -112,17 +190,39 @@ namespace MediaBrowser.Server.Implementations.EntryPoints
private void DisposeNat()
{
if (_currentCancellationTokenSource != null)
_logger.Debug("Stopping NAT discovery");
if (_timer != null)
{
try
{
_currentCancellationTokenSource.Cancel();
}
catch (Exception ex)
{
_logger.ErrorException("Error calling _currentCancellationTokenSource.Cancel", ex);
}
_timer.Dispose();
_timer = null;
}
_ssdp.MessageReceived -= _ssdp_MessageReceived;
try
{
// This is not a significant improvement
NatUtility.StopDiscovery();
NatUtility.DeviceFound -= NatUtility_DeviceFound;
NatUtility.DeviceLost -= NatUtility_DeviceLost;
NatUtility.UnhandledException -= NatUtility_UnhandledException;
}
// Statements in try-block will no fail because StopDiscovery is a one-line
// method that was no chances to fail.
// public static void StopDiscovery ()
// {
// searching.Reset();
// }
// IMO you could remove the catch-block
catch (Exception ex)
{
_logger.ErrorException("Error stopping NAT Discovery", ex);
}
finally
{
_isStarted = false;
}
}
}
}
}

4
MediaBrowser.Server.Implementations/MediaBrowser.Server.Implementations.csproj
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@ -62,10 +62,6 @@
<Reference Include="MoreLinq">
<HintPath>..\packages\morelinq.1.4.0\lib\net35\MoreLinq.dll</HintPath>
</Reference>
<Reference Include="Open.Nat, Version=2.0.15.0, Culture=neutral, PublicKeyToken=f22a6a4582336c76, processorArchitecture=MSIL">
<HintPath>..\packages\Open.NAT.2.0.15.0\lib\net45\Open.Nat.dll</HintPath>
<Private>True</Private>
</Reference>
<Reference Include="Patterns.Logging">
<HintPath>..\packages\Patterns.Logging.1.0.0.2\lib\portable-net45+sl4+wp71+win8+wpa81\Patterns.Logging.dll</HintPath>
</Reference>

1
MediaBrowser.Server.Implementations/packages.config
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@ -7,7 +7,6 @@
<package id="MediaBrowser.Naming" version="1.0.0.49" targetFramework="net45" />
<package id="Mono.Nat" version="1.2.24.0" targetFramework="net45" />
<package id="morelinq" version="1.4.0" targetFramework="net45" />
<package id="Open.NAT" version="2.0.15.0" targetFramework="net45" />
<package id="Patterns.Logging" version="1.0.0.2" targetFramework="net45" />
<package id="SocketHttpListener" version="1.0.0.29" targetFramework="net45" />
</packages>