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#nullable disable
#pragma warning disable CS1591
using System;
using System.Collections.Generic;
using System.Linq;
using Jellyfin.Data.Events;
using MediaBrowser.Controller.Configuration;
using MediaBrowser.Model.Dlna;
using Rssdp;
using Rssdp.Infrastructure;
namespace Emby.Dlna.Ssdp
{
public sealed class DeviceDiscovery : IDeviceDiscovery, IDisposable
{
private readonly object _syncLock = new object();
private readonly IServerConfigurationManager _config;
private SsdpDeviceLocator _deviceLocator;
private ISsdpCommunicationsServer _commsServer;
private int _listenerCount;
private bool _disposed;
public DeviceDiscovery(IServerConfigurationManager config)
{
_config = config;
}
private event EventHandler<GenericEventArgs<UpnpDeviceInfo>> DeviceDiscoveredInternal;
/// <inheritdoc />
public event EventHandler<GenericEventArgs<UpnpDeviceInfo>> DeviceDiscovered
{
add
{
lock (_syncLock)
{
_listenerCount++;
DeviceDiscoveredInternal += value;
}
StartInternal();
}
remove
{
lock (_syncLock)
{
_listenerCount--;
DeviceDiscoveredInternal -= value;
}
}
}
/// <inheritdoc />
public event EventHandler<GenericEventArgs<UpnpDeviceInfo>> DeviceLeft;
// Call this method from somewhere in your code to start the search.
public void Start(ISsdpCommunicationsServer communicationsServer)
{
_commsServer = communicationsServer;
StartInternal();
}
private void StartInternal()
{
lock (_syncLock)
{
if (_listenerCount > 0 && _deviceLocator is null && _commsServer is not null)
{
_deviceLocator = new SsdpDeviceLocator(
_commsServer,
Environment.OSVersion.Platform.ToString(),
// Can not use VersionString here since that includes OS and version
Environment.OSVersion.Version.ToString());
// (Optional) Set the filter so we only see notifications for devices we care about
// (can be any search target value i.e device type, uuid value etc - any value that appears in the
// DiscoverdSsdpDevice.NotificationType property or that is used with the searchTarget parameter of the Search method).
// _DeviceLocator.NotificationFilter = "upnp:rootdevice";
// Connect our event handler so we process devices as they are found
_deviceLocator.DeviceAvailable += OnDeviceLocatorDeviceAvailable;
_deviceLocator.DeviceUnavailable += OnDeviceLocatorDeviceUnavailable;
var dueTime = TimeSpan.FromSeconds(5);
var interval = TimeSpan.FromSeconds(_config.GetDlnaConfiguration().ClientDiscoveryIntervalSeconds);
_deviceLocator.RestartBroadcastTimer(dueTime, interval);
}
}
}
// Process each found device in the event handler
private void OnDeviceLocatorDeviceAvailable(object sender, DeviceAvailableEventArgs e)
{
var originalHeaders = e.DiscoveredDevice.ResponseHeaders;
var headerDict = originalHeaders is null ? new Dictionary<string, KeyValuePair<string, IEnumerable<string>>>() : originalHeaders.ToDictionary(i => i.Key, StringComparer.OrdinalIgnoreCase);
var headers = headerDict.ToDictionary(i => i.Key, i => i.Value.Value.FirstOrDefault(), StringComparer.OrdinalIgnoreCase);
var args = new GenericEventArgs<UpnpDeviceInfo>(
new UpnpDeviceInfo
{
Location = e.DiscoveredDevice.DescriptionLocation,
Headers = headers,
RemoteIPAddress = e.RemoteIPAddress
});
DeviceDiscoveredInternal?.Invoke(this, args);
}
private void OnDeviceLocatorDeviceUnavailable(object sender, DeviceUnavailableEventArgs e)
{
var originalHeaders = e.DiscoveredDevice.ResponseHeaders;
var headerDict = originalHeaders is null ? new Dictionary<string, KeyValuePair<string, IEnumerable<string>>>() : originalHeaders.ToDictionary(i => i.Key, StringComparer.OrdinalIgnoreCase);
var headers = headerDict.ToDictionary(i => i.Key, i => i.Value.Value.FirstOrDefault(), StringComparer.OrdinalIgnoreCase);
var args = new GenericEventArgs<UpnpDeviceInfo>(
new UpnpDeviceInfo
{
Location = e.DiscoveredDevice.DescriptionLocation,
Headers = headers
});
DeviceLeft?.Invoke(this, args);
}
/// <inheritdoc />
public void Dispose()
{
if (!_disposed)
{
_disposed = true;
if (_deviceLocator is not null)
{
_deviceLocator.Dispose();
_deviceLocator = null;
}
}
}
}
}
|
