jellyfin/MediaBrowser.Dlna/Ssdp/SsdpHandler.cs
2016-09-11 03:33:53 -04:00

329 lines
10 KiB
C#

using MediaBrowser.Common;
using MediaBrowser.Common.Configuration;
using MediaBrowser.Common.Events;
using MediaBrowser.Controller.Configuration;
using MediaBrowser.Controller.Dlna;
using MediaBrowser.Dlna.Server;
using MediaBrowser.Model.Logging;
using System;
using System.Collections.Generic;
using System.Globalization;
using System.Linq;
using System.Net;
using System.Net.Sockets;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using Microsoft.Win32;
namespace MediaBrowser.Dlna.Ssdp
{
public class SsdpHandler : IDisposable, ISsdpHandler
{
private Socket _multicastSocket;
private readonly ILogger _logger;
private readonly IServerConfigurationManager _config;
const string SSDPAddr = "239.255.255.250";
const int SSDPPort = 1900;
private readonly string _serverSignature;
private readonly IPAddress _ssdpIp = IPAddress.Parse(SSDPAddr);
private readonly IPEndPoint _ssdpEndp = new IPEndPoint(IPAddress.Parse(SSDPAddr), SSDPPort);
private Timer _notificationTimer;
private bool _isDisposed;
private readonly Dictionary<string, List<UpnpDevice>> _devices = new Dictionary<string, List<UpnpDevice>>();
private readonly IApplicationHost _appHost;
private readonly int _unicastPort = 1901;
private UdpClient _unicastClient;
public SsdpHandler(ILogger logger, IServerConfigurationManager config, IApplicationHost appHost)
{
_logger = logger;
_config = config;
_appHost = appHost;
_config.NamedConfigurationUpdated += _config_ConfigurationUpdated;
_serverSignature = GenerateServerSignature();
}
private string GenerateServerSignature()
{
var os = Environment.OSVersion;
var pstring = os.Platform.ToString();
switch (os.Platform)
{
case PlatformID.Win32NT:
case PlatformID.Win32S:
case PlatformID.Win32Windows:
pstring = "WIN";
break;
}
return String.Format(
"{0}{1}/{2}.{3} UPnP/1.0 DLNADOC/1.5 Emby/{4}",
pstring,
IntPtr.Size * 8,
os.Version.Major,
os.Version.Minor,
_appHost.ApplicationVersion
);
}
void _config_ConfigurationUpdated(object sender, ConfigurationUpdateEventArgs e)
{
if (string.Equals(e.Key, "dlna", StringComparison.OrdinalIgnoreCase))
{
ReloadAliveNotifier();
}
}
public IEnumerable<UpnpDevice> RegisteredDevices
{
get
{
lock (_devices)
{
var devices = _devices.ToList();
return devices.SelectMany(i => i.Value).ToList();
}
}
}
public void Start()
{
DisposeSocket();
StopAliveNotifier();
RestartSocketListener();
ReloadAliveNotifier();
SystemEvents.PowerModeChanged -= SystemEvents_PowerModeChanged;
SystemEvents.PowerModeChanged += SystemEvents_PowerModeChanged;
}
void SystemEvents_PowerModeChanged(object sender, PowerModeChangedEventArgs e)
{
if (e.Mode == PowerModes.Resume)
{
Start();
}
}
public async void SendDatagram(string msg,
EndPoint endpoint,
EndPoint localAddress,
bool isBroadcast,
int sendCount = 3)
{
var enableDebugLogging = _config.GetDlnaConfiguration().EnableDebugLog;
for (var i = 0; i < sendCount; i++)
{
if (i > 0)
{
await Task.Delay(500).ConfigureAwait(false);
}
var dgram = new Datagram(endpoint, localAddress, _logger, msg, isBroadcast, enableDebugLogging);
dgram.Send();
}
}
private void RestartSocketListener()
{
if (_isDisposed)
{
return;
}
try
{
_multicastSocket = CreateMulticastSocket();
_logger.Info("MultiCast socket created");
}
catch (Exception ex)
{
_logger.ErrorException("Error creating MultiCast socket", ex);
//StartSocketRetryTimer();
}
}
public void Dispose()
{
_config.NamedConfigurationUpdated -= _config_ConfigurationUpdated;
SystemEvents.PowerModeChanged -= SystemEvents_PowerModeChanged;
_isDisposed = true;
DisposeSocket();
StopAliveNotifier();
}
private void DisposeSocket()
{
if (_multicastSocket != null)
{
_multicastSocket.Close();
_multicastSocket.Dispose();
_multicastSocket = null;
}
}
private Socket CreateMulticastSocket()
{
var socket = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
socket.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.Broadcast, true);
socket.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.ReuseAddress, true);
socket.SetSocketOption(SocketOptionLevel.IP, SocketOptionName.MulticastTimeToLive, 4);
socket.SetSocketOption(SocketOptionLevel.IP, SocketOptionName.AddMembership, new MulticastOption(_ssdpIp, 0));
socket.Bind(new IPEndPoint(IPAddress.Any, SSDPPort));
return socket;
}
private void NotifyAll()
{
var enableDebugLogging = _config.GetDlnaConfiguration().EnableDebugLog;
if (enableDebugLogging)
{
_logger.Debug("Sending alive notifications");
}
foreach (var d in RegisteredDevices)
{
NotifyDevice(d, "alive", enableDebugLogging);
}
}
private void NotifyDevice(UpnpDevice dev, string type, bool logMessage)
{
const string header = "NOTIFY * HTTP/1.1";
var values = new Dictionary<string, string>(StringComparer.OrdinalIgnoreCase);
// If needed later for non-server devices, these headers will need to be dynamic
values["HOST"] = "239.255.255.250:1900";
values["CACHE-CONTROL"] = "max-age = 600";
values["LOCATION"] = dev.Descriptor.ToString();
values["SERVER"] = _serverSignature;
values["NTS"] = "ssdp:" + type;
values["NT"] = dev.Type;
values["USN"] = dev.USN;
if (logMessage)
{
_logger.Debug("{0} said {1}", dev.USN, type);
}
var msg = new SsdpMessageBuilder().BuildMessage(header, values);
SendDatagram(msg, _ssdpEndp, new IPEndPoint(dev.Address, 0), true, 2);
//SendUnicastRequest(msg, 1);
}
public void RegisterNotification(string uuid, Uri descriptionUri, IPAddress address, IEnumerable<string> services)
{
lock (_devices)
{
List<UpnpDevice> list;
List<UpnpDevice> dl;
if (_devices.TryGetValue(uuid, out dl))
{
list = dl;
}
else
{
list = new List<UpnpDevice>();
_devices[uuid] = list;
}
list.AddRange(services.Select(i => new UpnpDevice(uuid, i, descriptionUri, address)));
NotifyAll();
_logger.Debug("Registered mount {0} at {1}", uuid, descriptionUri);
}
}
public void UnregisterNotification(string uuid)
{
lock (_devices)
{
List<UpnpDevice> dl;
if (_devices.TryGetValue(uuid, out dl))
{
_devices.Remove(uuid);
foreach (var d in dl.ToList())
{
NotifyDevice(d, "byebye", true);
}
_logger.Debug("Unregistered mount {0}", uuid);
}
}
}
private readonly object _notificationTimerSyncLock = new object();
private int _aliveNotifierIntervalMs;
private void ReloadAliveNotifier()
{
var config = _config.GetDlnaConfiguration();
if (!config.BlastAliveMessages)
{
StopAliveNotifier();
return;
}
var intervalMs = config.BlastAliveMessageIntervalSeconds * 1000;
if (_notificationTimer == null || _aliveNotifierIntervalMs != intervalMs)
{
lock (_notificationTimerSyncLock)
{
if (_notificationTimer == null)
{
_logger.Debug("Starting alive notifier");
const int initialDelayMs = 3000;
_notificationTimer = new Timer(state => NotifyAll(), null, initialDelayMs, intervalMs);
}
else
{
_logger.Debug("Updating alive notifier");
_notificationTimer.Change(intervalMs, intervalMs);
}
_aliveNotifierIntervalMs = intervalMs;
}
}
}
private void StopAliveNotifier()
{
lock (_notificationTimerSyncLock)
{
if (_notificationTimer != null)
{
_logger.Debug("Stopping alive notifier");
_notificationTimer.Dispose();
_notificationTimer = null;
}
}
}
public class UdpState
{
public UdpClient UdpClient;
public IPEndPoint EndPoint;
}
}
}