mirror of
https://github.com/jellyfin/jellyfin.git
synced 2024-08-31 00:24:45 +02:00
660 lines
26 KiB
C#
660 lines
26 KiB
C#
using System;
|
|
using System.Collections.Generic;
|
|
using System.Collections.ObjectModel;
|
|
using System.Linq;
|
|
using System.Net;
|
|
using System.Threading;
|
|
using System.Threading.Tasks;
|
|
using MediaBrowser.Common.Net;
|
|
|
|
namespace Rssdp.Infrastructure
|
|
{
|
|
/// <summary>
|
|
/// Provides the platform independent logic for publishing SSDP devices (notifications and search responses).
|
|
/// </summary>
|
|
public class SsdpDevicePublisher : DisposableManagedObjectBase, ISsdpDevicePublisher
|
|
{
|
|
private readonly INetworkManager _networkManager;
|
|
|
|
private ISsdpCommunicationsServer _CommsServer;
|
|
private string _OSName;
|
|
private string _OSVersion;
|
|
private bool _sendOnlyMatchedHost;
|
|
|
|
private bool _SupportPnpRootDevice;
|
|
|
|
private IList<SsdpRootDevice> _Devices;
|
|
private IReadOnlyList<SsdpRootDevice> _ReadOnlyDevices;
|
|
|
|
private Timer _RebroadcastAliveNotificationsTimer;
|
|
|
|
private IDictionary<string, SearchRequest> _RecentSearchRequests;
|
|
|
|
private Random _Random;
|
|
|
|
private const string ServerVersion = "1.0";
|
|
|
|
/// <summary>
|
|
/// Default constructor.
|
|
/// </summary>
|
|
public SsdpDevicePublisher(ISsdpCommunicationsServer communicationsServer, INetworkManager networkManager,
|
|
string osName, string osVersion, bool sendOnlyMatchedHost)
|
|
{
|
|
if (communicationsServer == null)
|
|
{
|
|
throw new ArgumentNullException(nameof(communicationsServer));
|
|
}
|
|
|
|
if (networkManager == null)
|
|
{
|
|
throw new ArgumentNullException(nameof(networkManager));
|
|
}
|
|
|
|
if (osName == null)
|
|
{
|
|
throw new ArgumentNullException(nameof(osName));
|
|
}
|
|
|
|
if (osName.Length == 0)
|
|
{
|
|
throw new ArgumentException("osName cannot be an empty string.", nameof(osName));
|
|
}
|
|
|
|
if (osVersion == null)
|
|
{
|
|
throw new ArgumentNullException(nameof(osVersion));
|
|
}
|
|
|
|
if (osVersion.Length == 0)
|
|
{
|
|
throw new ArgumentException("osVersion cannot be an empty string.", nameof(osName));
|
|
}
|
|
|
|
_SupportPnpRootDevice = true;
|
|
_Devices = new List<SsdpRootDevice>();
|
|
_ReadOnlyDevices = new ReadOnlyCollection<SsdpRootDevice>(_Devices);
|
|
_RecentSearchRequests = new Dictionary<string, SearchRequest>(StringComparer.OrdinalIgnoreCase);
|
|
_Random = new Random();
|
|
|
|
_networkManager = networkManager;
|
|
_CommsServer = communicationsServer;
|
|
_CommsServer.RequestReceived += CommsServer_RequestReceived;
|
|
_OSName = osName;
|
|
_OSVersion = osVersion;
|
|
_sendOnlyMatchedHost = sendOnlyMatchedHost;
|
|
|
|
_CommsServer.BeginListeningForBroadcasts();
|
|
}
|
|
|
|
public void StartBroadcastingAliveMessages(TimeSpan interval)
|
|
{
|
|
_RebroadcastAliveNotificationsTimer = new Timer(SendAllAliveNotifications, null, TimeSpan.FromSeconds(5), interval);
|
|
}
|
|
|
|
/// <summary>
|
|
/// Adds a device (and it's children) to the list of devices being published by this server, making them discoverable to SSDP clients.
|
|
/// </summary>
|
|
/// <remarks>
|
|
/// <para>Adding a device causes "alive" notification messages to be sent immediately, or very soon after. Ensure your device/description service is running before adding the device object here.</para>
|
|
/// <para>Devices added here with a non-zero cache life time will also have notifications broadcast periodically.</para>
|
|
/// <para>This method ignores duplicate device adds (if the same device instance is added multiple times, the second and subsequent add calls do nothing).</para>
|
|
/// </remarks>
|
|
/// <param name="device">The <see cref="SsdpDevice"/> instance to add.</param>
|
|
/// <exception cref="ArgumentNullException">Thrown if the <paramref name="device"/> argument is null.</exception>
|
|
/// <exception cref="InvalidOperationException">Thrown if the <paramref name="device"/> contains property values that are not acceptable to the UPnP 1.0 specification.</exception>
|
|
[System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Performance", "CA1804:RemoveUnusedLocals", MessageId = "t", Justification = "Capture task to local variable suppresses compiler warning, but task is not really needed.")]
|
|
public void AddDevice(SsdpRootDevice device)
|
|
{
|
|
if (device == null)
|
|
{
|
|
throw new ArgumentNullException(nameof(device));
|
|
}
|
|
|
|
ThrowIfDisposed();
|
|
|
|
bool wasAdded = false;
|
|
lock (_Devices)
|
|
{
|
|
if (!_Devices.Contains(device))
|
|
{
|
|
_Devices.Add(device);
|
|
wasAdded = true;
|
|
}
|
|
}
|
|
|
|
if (wasAdded)
|
|
{
|
|
WriteTrace("Device Added", device);
|
|
|
|
SendAliveNotifications(device, true, CancellationToken.None);
|
|
}
|
|
}
|
|
|
|
/// <summary>
|
|
/// Removes a device (and it's children) from the list of devices being published by this server, making them undiscoverable.
|
|
/// </summary>
|
|
/// <remarks>
|
|
/// <para>Removing a device causes "byebye" notification messages to be sent immediately, advising clients of the device/service becoming unavailable. We recommend removing the device from the published list before shutting down the actual device/service, if possible.</para>
|
|
/// <para>This method does nothing if the device was not found in the collection.</para>
|
|
/// </remarks>
|
|
/// <param name="device">The <see cref="SsdpDevice"/> instance to add.</param>
|
|
/// <exception cref="ArgumentNullException">Thrown if the <paramref name="device"/> argument is null.</exception>
|
|
public async Task RemoveDevice(SsdpRootDevice device)
|
|
{
|
|
if (device == null)
|
|
{
|
|
throw new ArgumentNullException(nameof(device));
|
|
}
|
|
|
|
bool wasRemoved = false;
|
|
lock (_Devices)
|
|
{
|
|
if (_Devices.Contains(device))
|
|
{
|
|
_Devices.Remove(device);
|
|
wasRemoved = true;
|
|
}
|
|
}
|
|
|
|
if (wasRemoved)
|
|
{
|
|
WriteTrace("Device Removed", device);
|
|
|
|
await SendByeByeNotifications(device, true, CancellationToken.None).ConfigureAwait(false);
|
|
}
|
|
}
|
|
|
|
/// <summary>
|
|
/// Returns a read only list of devices being published by this instance.
|
|
/// </summary>
|
|
public IEnumerable<SsdpRootDevice> Devices
|
|
{
|
|
get
|
|
{
|
|
return _ReadOnlyDevices;
|
|
}
|
|
}
|
|
|
|
/// <summary>
|
|
/// If true (default) treats root devices as both upnp:rootdevice and pnp:rootdevice types.
|
|
/// </summary>
|
|
/// <remarks>
|
|
/// <para>Enabling this option will cause devices to show up in Microsoft Windows Explorer's network screens (if discovery is enabled etc.). Windows Explorer appears to search only for pnp:rootdeivce and not upnp:rootdevice.</para>
|
|
/// <para>If false, the system will only use upnp:rootdevice for notification broadcasts and and search responses, which is correct according to the UPnP/SSDP spec.</para>
|
|
/// </remarks>
|
|
public bool SupportPnpRootDevice
|
|
{
|
|
get { return _SupportPnpRootDevice; }
|
|
|
|
set
|
|
{
|
|
_SupportPnpRootDevice = value;
|
|
}
|
|
}
|
|
|
|
/// <summary>
|
|
/// Stops listening for requests, stops sending periodic broadcasts, disposes all internal resources.
|
|
/// </summary>
|
|
/// <param name="disposing"></param>
|
|
protected override void Dispose(bool disposing)
|
|
{
|
|
if (disposing)
|
|
{
|
|
DisposeRebroadcastTimer();
|
|
|
|
var commsServer = _CommsServer;
|
|
if (commsServer != null)
|
|
{
|
|
commsServer.RequestReceived -= this.CommsServer_RequestReceived;
|
|
}
|
|
|
|
var tasks = Devices.ToList().Select(RemoveDevice).ToArray();
|
|
Task.WaitAll(tasks);
|
|
|
|
_CommsServer = null;
|
|
if (commsServer != null)
|
|
{
|
|
if (!commsServer.IsShared)
|
|
{
|
|
commsServer.Dispose();
|
|
}
|
|
}
|
|
|
|
_RecentSearchRequests = null;
|
|
}
|
|
}
|
|
|
|
private void ProcessSearchRequest(
|
|
string mx,
|
|
string searchTarget,
|
|
IPEndPoint remoteEndPoint,
|
|
IPAddress receivedOnlocalIpAddress,
|
|
CancellationToken cancellationToken)
|
|
{
|
|
if (String.IsNullOrEmpty(searchTarget))
|
|
{
|
|
WriteTrace(String.Format("Invalid search request received From {0}, Target is null/empty.", remoteEndPoint.ToString()));
|
|
return;
|
|
}
|
|
|
|
// WriteTrace(String.Format("Search Request Received From {0}, Target = {1}", remoteEndPoint.ToString(), searchTarget));
|
|
|
|
if (IsDuplicateSearchRequest(searchTarget, remoteEndPoint))
|
|
{
|
|
// WriteTrace("Search Request is Duplicate, ignoring.");
|
|
return;
|
|
}
|
|
|
|
// Wait on random interval up to MX, as per SSDP spec.
|
|
// Also, as per UPnP 1.1/SSDP spec ignore missing/bank MX header. If over 120, assume random value between 0 and 120.
|
|
// Using 16 as minimum as that's often the minimum system clock frequency anyway.
|
|
int maxWaitInterval = 0;
|
|
if (String.IsNullOrEmpty(mx))
|
|
{
|
|
// Windows Explorer is poorly behaved and doesn't supply an MX header value.
|
|
// if (this.SupportPnpRootDevice)
|
|
mx = "1";
|
|
// else
|
|
// return;
|
|
}
|
|
|
|
if (!Int32.TryParse(mx, out maxWaitInterval) || maxWaitInterval <= 0)
|
|
{
|
|
return;
|
|
}
|
|
|
|
if (maxWaitInterval > 120)
|
|
{
|
|
maxWaitInterval = _Random.Next(0, 120);
|
|
}
|
|
|
|
// Do not block synchronously as that may tie up a threadpool thread for several seconds.
|
|
Task.Delay(_Random.Next(16, (maxWaitInterval * 1000))).ContinueWith((parentTask) =>
|
|
{
|
|
// Copying devices to local array here to avoid threading issues/enumerator exceptions.
|
|
IEnumerable<SsdpDevice> devices = null;
|
|
lock (_Devices)
|
|
{
|
|
if (String.Compare(SsdpConstants.SsdpDiscoverAllSTHeader, searchTarget, StringComparison.OrdinalIgnoreCase) == 0)
|
|
{
|
|
devices = GetAllDevicesAsFlatEnumerable().ToArray();
|
|
}
|
|
else if (String.Compare(SsdpConstants.UpnpDeviceTypeRootDevice, searchTarget, StringComparison.OrdinalIgnoreCase) == 0 || (this.SupportPnpRootDevice && String.Compare(SsdpConstants.PnpDeviceTypeRootDevice, searchTarget, StringComparison.OrdinalIgnoreCase) == 0))
|
|
{
|
|
devices = _Devices.ToArray();
|
|
}
|
|
else if (searchTarget.Trim().StartsWith("uuid:", StringComparison.OrdinalIgnoreCase))
|
|
{
|
|
devices = (from device in GetAllDevicesAsFlatEnumerable() where String.Compare(device.Uuid, searchTarget.Substring(5), StringComparison.OrdinalIgnoreCase) == 0 select device).ToArray();
|
|
}
|
|
else if (searchTarget.StartsWith("urn:", StringComparison.OrdinalIgnoreCase))
|
|
{
|
|
devices = (from device in GetAllDevicesAsFlatEnumerable() where String.Compare(device.FullDeviceType, searchTarget, StringComparison.OrdinalIgnoreCase) == 0 select device).ToArray();
|
|
}
|
|
}
|
|
|
|
if (devices != null)
|
|
{
|
|
var deviceList = devices.ToList();
|
|
// WriteTrace(String.Format("Sending {0} search responses", deviceList.Count));
|
|
|
|
foreach (var device in deviceList)
|
|
{
|
|
var root = device.ToRootDevice();
|
|
var source = new IPNetAddress(root.Address, root.PrefixLength);
|
|
var destination = new IPNetAddress(remoteEndPoint.Address, root.PrefixLength);
|
|
if (!_sendOnlyMatchedHost || source.NetworkAddress.Equals(destination.NetworkAddress))
|
|
{
|
|
SendDeviceSearchResponses(device, remoteEndPoint, receivedOnlocalIpAddress, cancellationToken);
|
|
}
|
|
}
|
|
}
|
|
});
|
|
}
|
|
|
|
private IEnumerable<SsdpDevice> GetAllDevicesAsFlatEnumerable()
|
|
{
|
|
return _Devices.Union(_Devices.SelectManyRecursive<SsdpDevice>((d) => d.Devices));
|
|
}
|
|
|
|
private void SendDeviceSearchResponses(
|
|
SsdpDevice device,
|
|
IPEndPoint endPoint,
|
|
IPAddress receivedOnlocalIpAddress,
|
|
CancellationToken cancellationToken)
|
|
{
|
|
bool isRootDevice = (device as SsdpRootDevice) != null;
|
|
if (isRootDevice)
|
|
{
|
|
SendSearchResponse(SsdpConstants.UpnpDeviceTypeRootDevice, device, GetUsn(device.Udn, SsdpConstants.UpnpDeviceTypeRootDevice), endPoint, receivedOnlocalIpAddress, cancellationToken);
|
|
if (this.SupportPnpRootDevice)
|
|
{
|
|
SendSearchResponse(SsdpConstants.PnpDeviceTypeRootDevice, device, GetUsn(device.Udn, SsdpConstants.PnpDeviceTypeRootDevice), endPoint, receivedOnlocalIpAddress, cancellationToken);
|
|
}
|
|
}
|
|
|
|
SendSearchResponse(device.Udn, device, device.Udn, endPoint, receivedOnlocalIpAddress, cancellationToken);
|
|
|
|
SendSearchResponse(device.FullDeviceType, device, GetUsn(device.Udn, device.FullDeviceType), endPoint, receivedOnlocalIpAddress, cancellationToken);
|
|
}
|
|
|
|
private string GetUsn(string udn, string fullDeviceType)
|
|
{
|
|
return String.Format("{0}::{1}", udn, fullDeviceType);
|
|
}
|
|
|
|
private async void SendSearchResponse(
|
|
string searchTarget,
|
|
SsdpDevice device,
|
|
string uniqueServiceName,
|
|
IPEndPoint endPoint,
|
|
IPAddress receivedOnlocalIpAddress,
|
|
CancellationToken cancellationToken)
|
|
{
|
|
var rootDevice = device.ToRootDevice();
|
|
|
|
// var additionalheaders = FormatCustomHeadersForResponse(device);
|
|
|
|
const string header = "HTTP/1.1 200 OK";
|
|
|
|
var values = new Dictionary<string, string>(StringComparer.OrdinalIgnoreCase);
|
|
|
|
values["EXT"] = "";
|
|
values["DATE"] = DateTime.UtcNow.ToString("r");
|
|
values["CACHE-CONTROL"] = "max-age = " + rootDevice.CacheLifetime.TotalSeconds;
|
|
values["ST"] = searchTarget;
|
|
values["SERVER"] = string.Format("{0}/{1} UPnP/1.0 RSSDP/{2}", _OSName, _OSVersion, ServerVersion);
|
|
values["USN"] = uniqueServiceName;
|
|
values["LOCATION"] = rootDevice.Location.ToString();
|
|
|
|
var message = BuildMessage(header, values);
|
|
|
|
try
|
|
{
|
|
await _CommsServer.SendMessage(
|
|
System.Text.Encoding.UTF8.GetBytes(message),
|
|
endPoint,
|
|
receivedOnlocalIpAddress,
|
|
cancellationToken)
|
|
.ConfigureAwait(false);
|
|
}
|
|
catch (Exception)
|
|
{
|
|
}
|
|
|
|
// WriteTrace(String.Format("Sent search response to " + endPoint.ToString()), device);
|
|
}
|
|
|
|
private bool IsDuplicateSearchRequest(string searchTarget, IPEndPoint endPoint)
|
|
{
|
|
var isDuplicateRequest = false;
|
|
|
|
var newRequest = new SearchRequest() { EndPoint = endPoint, SearchTarget = searchTarget, Received = DateTime.UtcNow };
|
|
lock (_RecentSearchRequests)
|
|
{
|
|
if (_RecentSearchRequests.ContainsKey(newRequest.Key))
|
|
{
|
|
var lastRequest = _RecentSearchRequests[newRequest.Key];
|
|
if (lastRequest.IsOld())
|
|
{
|
|
_RecentSearchRequests[newRequest.Key] = newRequest;
|
|
}
|
|
else
|
|
{
|
|
isDuplicateRequest = true;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
_RecentSearchRequests.Add(newRequest.Key, newRequest);
|
|
if (_RecentSearchRequests.Count > 10)
|
|
{
|
|
CleanUpRecentSearchRequestsAsync();
|
|
}
|
|
}
|
|
}
|
|
|
|
return isDuplicateRequest;
|
|
}
|
|
|
|
private void CleanUpRecentSearchRequestsAsync()
|
|
{
|
|
lock (_RecentSearchRequests)
|
|
{
|
|
foreach (var requestKey in (from r in _RecentSearchRequests where r.Value.IsOld() select r.Key).ToArray())
|
|
{
|
|
_RecentSearchRequests.Remove(requestKey);
|
|
}
|
|
}
|
|
}
|
|
|
|
private void SendAllAliveNotifications(object state)
|
|
{
|
|
try
|
|
{
|
|
if (IsDisposed)
|
|
{
|
|
return;
|
|
}
|
|
|
|
// WriteTrace("Begin Sending Alive Notifications For All Devices");
|
|
|
|
SsdpRootDevice[] devices;
|
|
lock (_Devices)
|
|
{
|
|
devices = _Devices.ToArray();
|
|
}
|
|
|
|
foreach (var device in devices)
|
|
{
|
|
if (IsDisposed)
|
|
{
|
|
return;
|
|
}
|
|
|
|
SendAliveNotifications(device, true, CancellationToken.None);
|
|
}
|
|
|
|
// WriteTrace("Completed Sending Alive Notifications For All Devices");
|
|
}
|
|
catch (ObjectDisposedException ex)
|
|
{
|
|
WriteTrace("Publisher stopped, exception " + ex.Message);
|
|
Dispose();
|
|
}
|
|
}
|
|
|
|
private void SendAliveNotifications(SsdpDevice device, bool isRoot, CancellationToken cancellationToken)
|
|
{
|
|
if (isRoot)
|
|
{
|
|
SendAliveNotification(device, SsdpConstants.UpnpDeviceTypeRootDevice, GetUsn(device.Udn, SsdpConstants.UpnpDeviceTypeRootDevice), cancellationToken);
|
|
if (this.SupportPnpRootDevice)
|
|
{
|
|
SendAliveNotification(device, SsdpConstants.PnpDeviceTypeRootDevice, GetUsn(device.Udn, SsdpConstants.PnpDeviceTypeRootDevice), cancellationToken);
|
|
}
|
|
}
|
|
|
|
SendAliveNotification(device, device.Udn, device.Udn, cancellationToken);
|
|
SendAliveNotification(device, device.FullDeviceType, GetUsn(device.Udn, device.FullDeviceType), cancellationToken);
|
|
|
|
foreach (var childDevice in device.Devices)
|
|
{
|
|
SendAliveNotifications(childDevice, false, cancellationToken);
|
|
}
|
|
}
|
|
|
|
private void SendAliveNotification(SsdpDevice device, string notificationType, string uniqueServiceName, CancellationToken cancellationToken)
|
|
{
|
|
var rootDevice = device.ToRootDevice();
|
|
|
|
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["DATE"] = DateTime.UtcNow.ToString("r");
|
|
values["CACHE-CONTROL"] = "max-age = " + rootDevice.CacheLifetime.TotalSeconds;
|
|
values["LOCATION"] = rootDevice.Location.ToString();
|
|
values["SERVER"] = string.Format("{0}/{1} UPnP/1.0 RSSDP/{2}", _OSName, _OSVersion, ServerVersion);
|
|
values["NTS"] = "ssdp:alive";
|
|
values["NT"] = notificationType;
|
|
values["USN"] = uniqueServiceName;
|
|
|
|
var message = BuildMessage(header, values);
|
|
|
|
_CommsServer.SendMulticastMessage(message, _sendOnlyMatchedHost ? rootDevice.Address : null, cancellationToken);
|
|
|
|
// WriteTrace(String.Format("Sent alive notification"), device);
|
|
}
|
|
|
|
private Task SendByeByeNotifications(SsdpDevice device, bool isRoot, CancellationToken cancellationToken)
|
|
{
|
|
var tasks = new List<Task>();
|
|
if (isRoot)
|
|
{
|
|
tasks.Add(SendByeByeNotification(device, SsdpConstants.UpnpDeviceTypeRootDevice, GetUsn(device.Udn, SsdpConstants.UpnpDeviceTypeRootDevice), cancellationToken));
|
|
if (this.SupportPnpRootDevice)
|
|
{
|
|
tasks.Add(SendByeByeNotification(device, "pnp:rootdevice", GetUsn(device.Udn, "pnp:rootdevice"), cancellationToken));
|
|
}
|
|
}
|
|
|
|
tasks.Add(SendByeByeNotification(device, device.Udn, device.Udn, cancellationToken));
|
|
tasks.Add(SendByeByeNotification(device, String.Format("urn:{0}", device.FullDeviceType), GetUsn(device.Udn, device.FullDeviceType), cancellationToken));
|
|
|
|
foreach (var childDevice in device.Devices)
|
|
{
|
|
tasks.Add(SendByeByeNotifications(childDevice, false, cancellationToken));
|
|
}
|
|
|
|
return Task.WhenAll(tasks);
|
|
}
|
|
|
|
[System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Naming", "CA2204:Literals should be spelled correctly", MessageId = "byebye", Justification = "Correct value for this type of notification in SSDP.")]
|
|
private Task SendByeByeNotification(SsdpDevice device, string notificationType, string uniqueServiceName, CancellationToken cancellationToken)
|
|
{
|
|
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["DATE"] = DateTime.UtcNow.ToString("r");
|
|
values["SERVER"] = string.Format("{0}/{1} UPnP/1.0 RSSDP/{2}", _OSName, _OSVersion, ServerVersion);
|
|
values["NTS"] = "ssdp:byebye";
|
|
values["NT"] = notificationType;
|
|
values["USN"] = uniqueServiceName;
|
|
|
|
var message = BuildMessage(header, values);
|
|
|
|
var sendCount = IsDisposed ? 1 : 3;
|
|
WriteTrace(String.Format("Sent byebye notification"), device);
|
|
return _CommsServer.SendMulticastMessage(message, sendCount, _sendOnlyMatchedHost ? device.ToRootDevice().Address : null, cancellationToken);
|
|
}
|
|
|
|
private void DisposeRebroadcastTimer()
|
|
{
|
|
var timer = _RebroadcastAliveNotificationsTimer;
|
|
_RebroadcastAliveNotificationsTimer = null;
|
|
if (timer != null)
|
|
{
|
|
timer.Dispose();
|
|
}
|
|
}
|
|
|
|
private TimeSpan GetMinimumNonZeroCacheLifetime()
|
|
{
|
|
var nonzeroCacheLifetimesQuery = (
|
|
from device
|
|
in _Devices
|
|
where device.CacheLifetime != TimeSpan.Zero
|
|
select device.CacheLifetime).ToList();
|
|
|
|
if (nonzeroCacheLifetimesQuery.Any())
|
|
{
|
|
return nonzeroCacheLifetimesQuery.Min();
|
|
}
|
|
else
|
|
{
|
|
return TimeSpan.Zero;
|
|
}
|
|
}
|
|
|
|
private string GetFirstHeaderValue(System.Net.Http.Headers.HttpRequestHeaders httpRequestHeaders, string headerName)
|
|
{
|
|
string retVal = null;
|
|
IEnumerable<String> values = null;
|
|
if (httpRequestHeaders.TryGetValues(headerName, out values) && values != null)
|
|
{
|
|
retVal = values.FirstOrDefault();
|
|
}
|
|
|
|
return retVal;
|
|
}
|
|
|
|
public Action<string> LogFunction { get; set; }
|
|
|
|
private void WriteTrace(string text)
|
|
{
|
|
if (LogFunction != null)
|
|
{
|
|
LogFunction(text);
|
|
}
|
|
// System.Diagnostics.Debug.WriteLine(text, "SSDP Publisher");
|
|
}
|
|
|
|
private void WriteTrace(string text, SsdpDevice device)
|
|
{
|
|
var rootDevice = device as SsdpRootDevice;
|
|
if (rootDevice != null)
|
|
{
|
|
WriteTrace(text + " " + device.DeviceType + " - " + device.Uuid + " - " + rootDevice.Location);
|
|
}
|
|
else
|
|
{
|
|
WriteTrace(text + " " + device.DeviceType + " - " + device.Uuid);
|
|
}
|
|
}
|
|
|
|
private void CommsServer_RequestReceived(object sender, RequestReceivedEventArgs e)
|
|
{
|
|
if (this.IsDisposed)
|
|
{
|
|
return;
|
|
}
|
|
|
|
if (string.Equals(e.Message.Method.Method, SsdpConstants.MSearchMethod, StringComparison.OrdinalIgnoreCase))
|
|
{
|
|
// According to SSDP/UPnP spec, ignore message if missing these headers.
|
|
// Edit: But some devices do it anyway
|
|
// if (!e.Message.Headers.Contains("MX"))
|
|
// WriteTrace("Ignoring search request - missing MX header.");
|
|
// else if (!e.Message.Headers.Contains("MAN"))
|
|
// WriteTrace("Ignoring search request - missing MAN header.");
|
|
// else
|
|
ProcessSearchRequest(GetFirstHeaderValue(e.Message.Headers, "MX"), GetFirstHeaderValue(e.Message.Headers, "ST"), e.ReceivedFrom, e.LocalIpAddress, CancellationToken.None);
|
|
}
|
|
}
|
|
|
|
private class SearchRequest
|
|
{
|
|
public IPEndPoint EndPoint { get; set; }
|
|
|
|
public DateTime Received { get; set; }
|
|
|
|
public string SearchTarget { get; set; }
|
|
|
|
public string Key
|
|
{
|
|
get { return this.SearchTarget + ":" + this.EndPoint.ToString(); }
|
|
}
|
|
|
|
public bool IsOld()
|
|
{
|
|
return DateTime.UtcNow.Subtract(this.Received).TotalMilliseconds > 500;
|
|
}
|
|
}
|
|
}
|
|
}
|