diff options
Diffstat (limited to 'RSSDP/SsdpDevicePublisher.cs')
| -rw-r--r-- | RSSDP/SsdpDevicePublisher.cs | 191 |
1 files changed, 81 insertions, 110 deletions
diff --git a/RSSDP/SsdpDevicePublisher.cs b/RSSDP/SsdpDevicePublisher.cs index be66f5947..0ac9cc9a1 100644 --- a/RSSDP/SsdpDevicePublisher.cs +++ b/RSSDP/SsdpDevicePublisher.cs @@ -4,9 +4,9 @@ using System.Collections.ObjectModel; using System.Globalization; using System.Linq; using System.Net; +using System.Text; using System.Threading; using System.Threading.Tasks; -using MediaBrowser.Common.Net; namespace Rssdp.Infrastructure { @@ -31,8 +31,6 @@ namespace Rssdp.Infrastructure private Random _Random; - private const string ServerVersion = "1.0"; - /// <summary> /// Default constructor. /// </summary> @@ -42,30 +40,9 @@ namespace Rssdp.Infrastructure string osVersion, bool sendOnlyMatchedHost) { - if (communicationsServer == null) - { - throw new ArgumentNullException(nameof(communicationsServer)); - } - - 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)); - } + ArgumentNullException.ThrowIfNull(communicationsServer); + ArgumentNullException.ThrowIfNullOrEmpty(osName); + ArgumentNullException.ThrowIfNullOrEmpty(osVersion); _SupportPnpRootDevice = true; _Devices = new List<SsdpRootDevice>(); @@ -79,10 +56,13 @@ namespace Rssdp.Infrastructure _OSVersion = osVersion; _sendOnlyMatchedHost = sendOnlyMatchedHost; - _CommsServer.BeginListeningForBroadcasts(); + _CommsServer.BeginListeningForMulticast(); + + // Send alive notification once on creation + SendAllAliveNotifications(null); } - public void StartBroadcastingAliveMessages(TimeSpan interval) + public void StartSendingAliveNotifications(TimeSpan interval) { _RebroadcastAliveNotificationsTimer = new Timer(SendAllAliveNotifications, null, TimeSpan.FromSeconds(5), interval); } @@ -98,10 +78,9 @@ namespace Rssdp.Infrastructure /// <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) + if (device is null) { throw new ArgumentNullException(nameof(device)); } @@ -137,7 +116,7 @@ namespace Rssdp.Infrastructure /// <exception cref="ArgumentNullException">Thrown if the <paramref name="device"/> argument is null.</exception> public async Task RemoveDevice(SsdpRootDevice device) { - if (device == null) + if (device is null) { throw new ArgumentNullException(nameof(device)); } @@ -199,7 +178,7 @@ namespace Rssdp.Infrastructure DisposeRebroadcastTimer(); var commsServer = _CommsServer; - if (commsServer != null) + if (commsServer is not null) { commsServer.RequestReceived -= this.CommsServer_RequestReceived; } @@ -208,7 +187,7 @@ namespace Rssdp.Infrastructure Task.WaitAll(tasks); _CommsServer = null; - if (commsServer != null) + if (commsServer is not null) { if (!commsServer.IsShared) { @@ -224,12 +203,12 @@ namespace Rssdp.Infrastructure string mx, string searchTarget, IPEndPoint remoteEndPoint, - IPAddress receivedOnlocalIpAddress, + IPAddress receivedOnlocalIPAddress, CancellationToken cancellationToken) { - if (String.IsNullOrEmpty(searchTarget)) + if (string.IsNullOrEmpty(searchTarget)) { - WriteTrace(String.Format(CultureInfo.InvariantCulture, "Invalid search request received From {0}, Target is null/empty.", remoteEndPoint.ToString())); + WriteTrace(string.Format(CultureInfo.InvariantCulture, "Invalid search request received From {0}, Target is null/empty.", remoteEndPoint.ToString())); return; } @@ -253,7 +232,7 @@ namespace Rssdp.Infrastructure // return; } - if (!Int32.TryParse(mx, out var maxWaitInterval) || maxWaitInterval <= 0) + if (!int.TryParse(mx, out var maxWaitInterval) || maxWaitInterval <= 0) { return; } @@ -264,47 +243,45 @@ namespace Rssdp.Infrastructure } // Do not block synchronously as that may tie up a threadpool thread for several seconds. - Task.Delay(_Random.Next(16, (maxWaitInterval * 1000))).ContinueWith((parentTask) => + Task.Delay(_Random.Next(16, maxWaitInterval * 1000), cancellationToken).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) + 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)) + else if (string.Compare(SsdpConstants.UpnpDeviceTypeRootDevice, searchTarget, StringComparison.OrdinalIgnoreCase) == 0 || (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(); + devices = GetAllDevicesAsFlatEnumerable().Where(d => string.Compare(d.Uuid, searchTarget.Substring(5), StringComparison.OrdinalIgnoreCase) == 0).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(); + devices = GetAllDevicesAsFlatEnumerable().Where(d => string.Compare(d.FullDeviceType, searchTarget, StringComparison.OrdinalIgnoreCase) == 0).ToArray(); } } - if (devices != null) + if (devices is not null) { - var deviceList = devices.ToList(); // WriteTrace(String.Format("Sending {0} search responses", deviceList.Count)); - foreach (var device in deviceList) + foreach (var device in devices) { 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)) + + if (!_sendOnlyMatchedHost || root.Address.Equals(receivedOnlocalIPAddress)) { - SendDeviceSearchResponses(device, remoteEndPoint, receivedOnlocalIpAddress, cancellationToken); + SendDeviceSearchResponses(device, remoteEndPoint, receivedOnlocalIPAddress, cancellationToken); } } } - }); + }, cancellationToken); } private IEnumerable<SsdpDevice> GetAllDevicesAsFlatEnumerable() @@ -315,27 +292,27 @@ namespace Rssdp.Infrastructure private void SendDeviceSearchResponses( SsdpDevice device, IPEndPoint endPoint, - IPAddress receivedOnlocalIpAddress, + IPAddress receivedOnlocalIPAddress, CancellationToken cancellationToken) { - bool isRootDevice = (device as SsdpRootDevice) != null; + bool isRootDevice = (device as SsdpRootDevice) is not null; if (isRootDevice) { - SendSearchResponse(SsdpConstants.UpnpDeviceTypeRootDevice, device, GetUsn(device.Udn, SsdpConstants.UpnpDeviceTypeRootDevice), endPoint, receivedOnlocalIpAddress, cancellationToken); - if (this.SupportPnpRootDevice) + SendSearchResponse(SsdpConstants.UpnpDeviceTypeRootDevice, device, GetUsn(device.Udn, SsdpConstants.UpnpDeviceTypeRootDevice), endPoint, receivedOnlocalIPAddress, cancellationToken); + if (SupportPnpRootDevice) { - SendSearchResponse(SsdpConstants.PnpDeviceTypeRootDevice, device, GetUsn(device.Udn, SsdpConstants.PnpDeviceTypeRootDevice), endPoint, receivedOnlocalIpAddress, cancellationToken); + SendSearchResponse(SsdpConstants.PnpDeviceTypeRootDevice, device, GetUsn(device.Udn, SsdpConstants.PnpDeviceTypeRootDevice), endPoint, receivedOnlocalIPAddress, cancellationToken); } } - SendSearchResponse(device.Udn, device, device.Udn, endPoint, receivedOnlocalIpAddress, cancellationToken); + SendSearchResponse(device.Udn, device, device.Udn, endPoint, receivedOnlocalIPAddress, cancellationToken); - SendSearchResponse(device.FullDeviceType, device, GetUsn(device.Udn, device.FullDeviceType), 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(CultureInfo.InvariantCulture, "{0}::{1}", udn, fullDeviceType); + return string.Format(CultureInfo.InvariantCulture, "{0}::{1}", udn, fullDeviceType); } private async void SendSearchResponse( @@ -343,33 +320,32 @@ namespace Rssdp.Infrastructure SsdpDevice device, string uniqueServiceName, IPEndPoint endPoint, - IPAddress receivedOnlocalIpAddress, + 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(CultureInfo.InvariantCulture, "{0}/{1} UPnP/1.0 RSSDP/{2}", _OSName, _OSVersion, ServerVersion); - values["USN"] = uniqueServiceName; - values["LOCATION"] = rootDevice.Location.ToString(); + var rootDevice = device.ToRootDevice(); + var values = new Dictionary<string, string>(StringComparer.OrdinalIgnoreCase) + { + ["EXT"] = "", + ["DATE"] = DateTime.UtcNow.ToString("r"), + ["HOST"] = string.Format(CultureInfo.InvariantCulture, "{0}:{1}", SsdpConstants.MulticastLocalAdminAddress, SsdpConstants.MulticastPort), + ["CACHE-CONTROL"] = "max-age = " + rootDevice.CacheLifetime.TotalSeconds, + ["ST"] = searchTarget, + ["SERVER"] = string.Format(CultureInfo.InvariantCulture, "{0}/{1} UPnP/1.0 RSSDP/{2}", _OSName, _OSVersion, SsdpConstants.ServerVersion), + ["USN"] = uniqueServiceName, + ["LOCATION"] = rootDevice.Location.ToString() + }; var message = BuildMessage(header, values); try { await _CommsServer.SendMessage( - System.Text.Encoding.UTF8.GetBytes(message), + Encoding.UTF8.GetBytes(message), endPoint, - receivedOnlocalIpAddress, + receivedOnlocalIPAddress, cancellationToken) .ConfigureAwait(false); } @@ -464,7 +440,7 @@ namespace Rssdp.Infrastructure if (isRoot) { SendAliveNotification(device, SsdpConstants.UpnpDeviceTypeRootDevice, GetUsn(device.Udn, SsdpConstants.UpnpDeviceTypeRootDevice), cancellationToken); - if (this.SupportPnpRootDevice) + if (SupportPnpRootDevice) { SendAliveNotification(device, SsdpConstants.PnpDeviceTypeRootDevice, GetUsn(device.Udn, SsdpConstants.PnpDeviceTypeRootDevice), cancellationToken); } @@ -485,17 +461,18 @@ namespace Rssdp.Infrastructure 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(CultureInfo.InvariantCulture, "{0}/{1} UPnP/1.0 RSSDP/{2}", _OSName, _OSVersion, ServerVersion); - values["NTS"] = "ssdp:alive"; - values["NT"] = notificationType; - values["USN"] = uniqueServiceName; + var values = new Dictionary<string, string>(StringComparer.OrdinalIgnoreCase) + { + // If needed later for non-server devices, these headers will need to be dynamic + ["HOST"] = string.Format(CultureInfo.InvariantCulture, "{0}:{1}", SsdpConstants.MulticastLocalAdminAddress, SsdpConstants.MulticastPort), + ["DATE"] = DateTime.UtcNow.ToString("r"), + ["CACHE-CONTROL"] = "max-age = " + rootDevice.CacheLifetime.TotalSeconds, + ["LOCATION"] = rootDevice.Location.ToString(), + ["SERVER"] = string.Format(CultureInfo.InvariantCulture, "{0}/{1} UPnP/1.0 RSSDP/{2}", _OSName, _OSVersion, SsdpConstants.ServerVersion), + ["NTS"] = "ssdp:alive", + ["NT"] = notificationType, + ["USN"] = uniqueServiceName + }; var message = BuildMessage(header, values); @@ -510,7 +487,7 @@ namespace Rssdp.Infrastructure if (isRoot) { tasks.Add(SendByeByeNotification(device, SsdpConstants.UpnpDeviceTypeRootDevice, GetUsn(device.Udn, SsdpConstants.UpnpDeviceTypeRootDevice), cancellationToken)); - if (this.SupportPnpRootDevice) + if (SupportPnpRootDevice) { tasks.Add(SendByeByeNotification(device, "pnp:rootdevice", GetUsn(device.Udn, "pnp:rootdevice"), cancellationToken)); } @@ -527,25 +504,25 @@ namespace Rssdp.Infrastructure 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(CultureInfo.InvariantCulture, "{0}/{1} UPnP/1.0 RSSDP/{2}", _OSName, _OSVersion, ServerVersion); - values["NTS"] = "ssdp:byebye"; - values["NT"] = notificationType; - values["USN"] = uniqueServiceName; + var values = new Dictionary<string, string>(StringComparer.OrdinalIgnoreCase) + { + // If needed later for non-server devices, these headers will need to be dynamic + ["HOST"] = string.Format(CultureInfo.InvariantCulture, "{0}:{1}", SsdpConstants.MulticastLocalAdminAddress, SsdpConstants.MulticastPort), + ["DATE"] = DateTime.UtcNow.ToString("r"), + ["SERVER"] = string.Format(CultureInfo.InvariantCulture, "{0}/{1} UPnP/1.0 RSSDP/{2}", _OSName, _OSVersion, SsdpConstants.ServerVersion), + ["NTS"] = "ssdp:byebye", + ["NT"] = notificationType, + ["USN"] = uniqueServiceName + }; var message = BuildMessage(header, values); var sendCount = IsDisposed ? 1 : 3; - WriteTrace(String.Format(CultureInfo.InvariantCulture, "Sent byebye notification"), device); + WriteTrace(string.Format(CultureInfo.InvariantCulture, "Sent byebye notification"), device); return _CommsServer.SendMulticastMessage(message, sendCount, _sendOnlyMatchedHost ? device.ToRootDevice().Address : null, cancellationToken); } @@ -553,10 +530,7 @@ namespace Rssdp.Infrastructure { var timer = _RebroadcastAliveNotificationsTimer; _RebroadcastAliveNotificationsTimer = null; - if (timer != null) - { - timer.Dispose(); - } + timer?.Dispose(); } private TimeSpan GetMinimumNonZeroCacheLifetime() @@ -578,7 +552,7 @@ namespace Rssdp.Infrastructure private string GetFirstHeaderValue(System.Net.Http.Headers.HttpRequestHeaders httpRequestHeaders, string headerName) { string retVal = null; - if (httpRequestHeaders.TryGetValues(headerName, out var values) && values != null) + if (httpRequestHeaders.TryGetValues(headerName, out var values) && values is not null) { retVal = values.FirstOrDefault(); } @@ -590,17 +564,14 @@ namespace Rssdp.Infrastructure private void WriteTrace(string text) { - if (LogFunction != null) - { - LogFunction(text); - } + LogFunction?.Invoke(text); // System.Diagnostics.Debug.WriteLine(text, "SSDP Publisher"); } private void WriteTrace(string text, SsdpDevice device) { var rootDevice = device as SsdpRootDevice; - if (rootDevice != null) + if (rootDevice is not null) { WriteTrace(text + " " + device.DeviceType + " - " + device.Uuid + " - " + rootDevice.Location); } @@ -626,7 +597,7 @@ namespace Rssdp.Infrastructure // 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); + ProcessSearchRequest(GetFirstHeaderValue(e.Message.Headers, "MX"), GetFirstHeaderValue(e.Message.Headers, "ST"), e.ReceivedFrom, e.LocalIPAddress, CancellationToken.None); } } |