public async Task<byte[]> SaveStateAsync ()
{
await MainLoop;
var state = new BEncodedDictionary {
{nameof (Settings), Serializer.Serialize (Settings) },
};
state[nameof (Torrents)] = new BEncodedList (Torrents.Select (t => {
var dict = new BEncodedDictionary {
{ nameof (t.MagnetLink), (BEncodedString) t.MagnetLink.ToV1String () },
{ nameof(t.SavePath), (BEncodedString) t.SavePath },
{ nameof(t.Settings), Serializer.Serialize (t.Settings) },
{ "Streaming", (BEncodedString) (t.StreamProvider != null).ToString ()},
};
if (t.HasMetadata) {
dict[nameof (t.Files)] = new BEncodedList (t.Files.Select (file =>
new BEncodedDictionary {
{ nameof(file.FullPath), (BEncodedString) file.FullPath },
{ nameof(file.Path), (BEncodedString) file.Path },
{ nameof(file.Priority), (BEncodedString) file.Priority.ToString () },
}
));
dict[nameof (t.MetadataPath)] = (BEncodedString) t.MetadataPath;
} else {
}
return dict;
}));
foreach (var v in Torrents)
await v.MaybeWriteFastResumeAsync ();
return state.Encode ();
}
async Task UpdateSettingsAsync(EngineSettings oldSettings, EngineSettings newSettings)
{
await DiskManager.UpdateSettingsAsync(newSettings);
if (newSettings.DiskCacheBytes != oldSettings.DiskCacheBytes)
{
await Task.WhenAll(Torrents.Select(t => DiskManager.FlushAsync(t)));
}
ConnectionManager.Settings = newSettings;
if (oldSettings.AllowPortForwarding != newSettings.AllowPortForwarding)
{
if (newSettings.AllowPortForwarding)
{
await PortForwarder.StartAsync(CancellationToken.None);
}
else
{
await PortForwarder.StopAsync(removeExistingMappings : true, CancellationToken.None);
}
}
if (oldSettings.DhtPort != newSettings.DhtPort)
{
if (DhtListener.EndPoint != null)
{
await PortForwarder.UnregisterMappingAsync(new Mapping (Protocol.Udp, DhtListener.EndPoint.Port), CancellationToken.None);
}
else if (oldSettings.DhtPort > 0)
{
await PortForwarder.UnregisterMappingAsync(new Mapping (Protocol.Udp, oldSettings.DhtPort), CancellationToken.None);
}
DhtListener = DhtListenerFactory.CreateUdp(newSettings.DhtPort);
if (oldSettings.DhtPort == -1)
{
await RegisterDht(DhtEngineFactory.Create(DhtListener));
}
else if (newSettings.DhtPort == -1)
{
await RegisterDht(new NullDhtEngine());
}
DhtEngine.SetListener(DhtListener);
if (IsRunning)
{
DhtListener.Start();
if (Listener is ISocketListener newDhtListener)
{
await PortForwarder.RegisterMappingAsync(new Mapping (Protocol.Udp, newDhtListener.EndPoint.Port));
}
else
{
await PortForwarder.RegisterMappingAsync(new Mapping (Protocol.Udp, newSettings.DhtPort));
}
}
}
if (oldSettings.ListenPort != newSettings.ListenPort)
{
if (Listener is ISocketListener oldListener)
{
await PortForwarder.UnregisterMappingAsync(new Mapping (Protocol.Tcp, oldListener.EndPoint.Port), CancellationToken.None);
}
else if (oldSettings.ListenPort > 0)
{
await PortForwarder.UnregisterMappingAsync(new Mapping (Protocol.Tcp, oldSettings.ListenPort), CancellationToken.None);
}
Listener.Stop();
Listener = PeerListenerFactory.CreateTcp(newSettings.ListenPort);
listenManager.SetListener(Listener);
if (IsRunning)
{
Listener.Start();
// The settings could say to listen at port 0, which means 'choose one dynamically'
if (Listener is ISocketListener peerListener)
{
await PortForwarder.RegisterMappingAsync(new Mapping (Protocol.Tcp, peerListener.EndPoint.Port));
}
else
{
await PortForwarder.RegisterMappingAsync(new Mapping (Protocol.Tcp, newSettings.ListenPort));
}
}
}
// This depends on the Listener binding to it's local port.
var localPort = newSettings.ListenPort;
if (Listener is ISocketListener newListener)
{
localPort = newListener.EndPoint.Port;
}
if ((oldSettings.AllowLocalPeerDiscovery != newSettings.AllowLocalPeerDiscovery) ||
(oldSettings.ListenPort != newSettings.ListenPort))
{
RegisterLocalPeerDiscovery(newSettings.AllowLocalPeerDiscovery && localPort > 0 ? new LocalPeerDiscovery(localPort) : null);
}
}
async Task UpdateSettingsAsync(EngineSettings oldSettings, EngineSettings newSettings)
{
await DiskManager.UpdateSettingsAsync(newSettings);
if (newSettings.DiskCacheBytes != oldSettings.DiskCacheBytes)
{
await Task.WhenAll(Torrents.Select(t => DiskManager.FlushAsync(t)));
}
ConnectionManager.Settings = newSettings;
if (oldSettings.UsePartialFiles != newSettings.UsePartialFiles)
{
foreach (var manager in Torrents)
{
await manager.UpdateUsePartialFiles(newSettings.UsePartialFiles);
}
}
if (oldSettings.AllowPortForwarding != newSettings.AllowPortForwarding)
{
if (newSettings.AllowPortForwarding)
{
await PortForwarder.StartAsync(CancellationToken.None);
}
else
{
await PortForwarder.StopAsync(removeExistingMappings : true, CancellationToken.None);
}
}
if (oldSettings.DhtEndPoint != newSettings.DhtEndPoint)
{
if (DhtListener.LocalEndPoint != null)
{
await PortForwarder.UnregisterMappingAsync(new Mapping (Protocol.Udp, DhtListener.LocalEndPoint.Port), CancellationToken.None);
}
DhtListener.Stop();
if (newSettings.DhtEndPoint == null)
{
DhtListener = new NullDhtListener();
await RegisterDht(new NullDhtEngine());
}
else
{
DhtListener = Factories.CreateDhtListener(Settings.DhtEndPoint) ?? new NullDhtListener();
if (IsRunning)
{
DhtListener.Start();
}
if (oldSettings.DhtEndPoint == null)
{
var dht = Factories.CreateDht();
await dht.SetListenerAsync(DhtListener);
await RegisterDht(dht);
}
else
{
await DhtEngine.SetListenerAsync(DhtListener);
}
}
if (DhtListener.LocalEndPoint != null)
{
await PortForwarder.RegisterMappingAsync(new Mapping (Protocol.Udp, DhtListener.LocalEndPoint.Port));
}
}
if (!Equals(oldSettings.ListenEndPoint, newSettings.ListenEndPoint))
{
if (PeerListener.LocalEndPoint != null)
{
await PortForwarder.UnregisterMappingAsync(new Mapping (Protocol.Tcp, PeerListener.LocalEndPoint.Port), CancellationToken.None);
}
PeerListener.Stop();
PeerListener = (newSettings.ListenEndPoint == null ? null : Factories.CreatePeerConnectionListener(newSettings.ListenEndPoint)) ?? new NullPeerListener();
listenManager.SetListener(PeerListener);
if (IsRunning)
{
PeerListener.Start();
// The settings could say to listen at port 0, which means 'choose one dynamically'
if (PeerListener.LocalEndPoint != null)
{
await PortForwarder.RegisterMappingAsync(new Mapping (Protocol.Tcp, PeerListener.LocalEndPoint.Port));
}
}
}
if (oldSettings.AllowLocalPeerDiscovery != newSettings.AllowLocalPeerDiscovery)
{
RegisterLocalPeerDiscovery(!newSettings.AllowLocalPeerDiscovery ? null : Factories.CreateLocalPeerDiscovery());
}
}