Merge branch 'master' into fix-resharper-warnings

# Conflicts:
#	Emby.Server.Implementations/Net/SocketFactory.cs
#	RSSDP/SsdpCommunicationsServer.cs
#	RSSDP/SsdpDeviceLocator.cs
#	RSSDP/SsdpDevicePublisher.cs

15 files changed, 201 insertions, 141 deletions

diff --git a/Emby.Server.Implementations/ApplicationHost.cs b/Emby.Server.Implementations/ApplicationHost.cs
index 8518b1352..c247178ee 100644
--- a/Emby.Server.Implementations/ApplicationHost.cs
+++ b/Emby.Server.Implementations/ApplicationHost.cs
@@ -101,7 +101,6 @@ using Microsoft.AspNetCore.Mvc;
 using Microsoft.EntityFrameworkCore;
 using Microsoft.Extensions.Configuration;
 using Microsoft.Extensions.DependencyInjection;
-using Microsoft.Extensions.Hosting;
 using Microsoft.Extensions.Logging;
 using Prometheus.DotNetRuntime;
 using static MediaBrowser.Controller.Extensions.ConfigurationExtensions;
@@ -133,7 +132,7 @@ namespace Emby.Server.Implementations
         /// <value>All concrete types.</value>
         private Type[] _allConcreteTypes;
 
-        private bool _disposed = false;
+        private bool _disposed;
 
         /// <summary>
         /// Initializes a new instance of the <see cref="ApplicationHost"/> class.
@@ -184,26 +183,16 @@ namespace Emby.Server.Implementations
 
         public bool CoreStartupHasCompleted { get; private set; }
 
-        public virtual bool CanLaunchWebBrowser => Environment.UserInteractive
-            && !_startupOptions.IsService
-            && (OperatingSystem.IsWindows() || OperatingSystem.IsMacOS());
-
         /// <summary>
         /// Gets the <see cref="INetworkManager"/> singleton instance.
         /// </summary>
         public INetworkManager NetManager { get; private set; }
 
-        /// <summary>
-        /// Gets a value indicating whether this instance has changes that require the entire application to restart.
-        /// </summary>
-        /// <value><c>true</c> if this instance has pending application restart; otherwise, <c>false</c>.</value>
-        public bool HasPendingRestart { get; private set; }
-
         /// <inheritdoc />
-        public bool IsShuttingDown { get; private set; }
+        public bool HasPendingRestart { get; private set; }
 
         /// <inheritdoc />
-        public bool ShouldRestart { get; private set; }
+        public bool ShouldRestart { get; set; }
 
         /// <summary>
         /// Gets the logger.
@@ -461,7 +450,7 @@ namespace Emby.Server.Implementations
 
             ConfigurationManager.AddParts(GetExports<IConfigurationFactory>());
 
-            NetManager = new NetworkManager(ConfigurationManager, LoggerFactory.CreateLogger<NetworkManager>());
+            NetManager = new NetworkManager(ConfigurationManager, _startupConfig, LoggerFactory.CreateLogger<NetworkManager>());
 
             // Initialize runtime stat collection
             if (ConfigurationManager.Configuration.EnableMetrics)
@@ -507,6 +496,8 @@ namespace Emby.Server.Implementations
             serviceCollection.AddSingleton<IFileSystem, ManagedFileSystem>();
             serviceCollection.AddSingleton<IShortcutHandler, MbLinkShortcutHandler>();
 
+            serviceCollection.AddScoped<ISystemManager, SystemManager>();
+
             serviceCollection.AddSingleton<TmdbClientManager>();
 
             serviceCollection.AddSingleton(NetManager);
@@ -850,24 +841,6 @@ namespace Emby.Server.Implementations
             }
         }
 
-        /// <inheritdoc />
-        public void Restart()
-        {
-            ShouldRestart = true;
-            Shutdown();
-        }
-
-        /// <inheritdoc />
-        public void Shutdown()
-        {
-            Task.Run(async () =>
-            {
-                await Task.Delay(100).ConfigureAwait(false);
-                IsShuttingDown = true;
-                Resolve<IHostApplicationLifetime>().StopApplication();
-            });
-        }
-
         /// <summary>
         /// Gets the composable part assemblies.
         /// </summary>
@@ -923,49 +896,6 @@ namespace Emby.Server.Implementations
 
         protected abstract IEnumerable<Assembly> GetAssembliesWithPartsInternal();
 
-        /// <summary>
-        /// Gets the system status.
-        /// </summary>
-        /// <param name="request">Where this request originated.</param>
-        /// <returns>SystemInfo.</returns>
-        public SystemInfo GetSystemInfo(HttpRequest request)
-        {
-            return new SystemInfo
-            {
-                HasPendingRestart = HasPendingRestart,
-                IsShuttingDown = IsShuttingDown,
-                Version = ApplicationVersionString,
-                WebSocketPortNumber = HttpPort,
-                CompletedInstallations = Resolve<IInstallationManager>().CompletedInstallations.ToArray(),
-                Id = SystemId,
-                ProgramDataPath = ApplicationPaths.ProgramDataPath,
-                WebPath = ApplicationPaths.WebPath,
-                LogPath = ApplicationPaths.LogDirectoryPath,
-                ItemsByNamePath = ApplicationPaths.InternalMetadataPath,
-                InternalMetadataPath = ApplicationPaths.InternalMetadataPath,
-                CachePath = ApplicationPaths.CachePath,
-                CanLaunchWebBrowser = CanLaunchWebBrowser,
-                TranscodingTempPath = ConfigurationManager.GetTranscodePath(),
-                ServerName = FriendlyName,
-                LocalAddress = GetSmartApiUrl(request),
-                SupportsLibraryMonitor = true,
-                PackageName = _startupOptions.PackageName
-            };
-        }
-
-        public PublicSystemInfo GetPublicSystemInfo(HttpRequest request)
-        {
-            return new PublicSystemInfo
-            {
-                Version = ApplicationVersionString,
-                ProductName = ApplicationProductName,
-                Id = SystemId,
-                ServerName = FriendlyName,
-                LocalAddress = GetSmartApiUrl(request),
-                StartupWizardCompleted = ConfigurationManager.CommonConfiguration.IsStartupWizardCompleted
-            };
-        }
-
         /// <inheritdoc/>
         public string GetSmartApiUrl(IPAddress remoteAddr)
         {
@@ -983,7 +913,7 @@ namespace Emby.Server.Implementations
         /// <inheritdoc/>
         public string GetSmartApiUrl(HttpRequest request)
         {
-            // Return the host in the HTTP request as the API url
+            // Return the host in the HTTP request as the API URL if not configured otherwise
             if (ConfigurationManager.GetNetworkConfiguration().EnablePublishedServerUriByRequest)
             {
                 int? requestPort = request.Host.Port;
@@ -1018,7 +948,7 @@ namespace Emby.Server.Implementations
         public string GetApiUrlForLocalAccess(IPAddress ipAddress = null, bool allowHttps = true)
         {
             // With an empty source, the port will be null
-            var smart = NetManager.GetBindAddress(ipAddress, out _, true);
+            var smart = NetManager.GetBindAddress(ipAddress, out _, false);
             var scheme = !allowHttps ? Uri.UriSchemeHttp : null;
             int? port = !allowHttps ? HttpPort : null;
             return GetLocalApiUrl(smart, scheme, port);
diff --git a/Emby.Server.Implementations/EntryPoints/UdpServerEntryPoint.cs b/Emby.Server.Implementations/EntryPoints/UdpServerEntryPoint.cs
index f810bf170..7e4994f1a 100644
--- a/Emby.Server.Implementations/EntryPoints/UdpServerEntryPoint.cs
+++ b/Emby.Server.Implementations/EntryPoints/UdpServerEntryPoint.cs
@@ -18,7 +18,7 @@ using Microsoft.Extensions.Logging;
 namespace Emby.Server.Implementations.EntryPoints
 {
     /// <summary>
-    /// Class UdpServerEntryPoint.
+    /// Class responsible for registering all UDP broadcast endpoints and their handlers.
     /// </summary>
     public sealed class UdpServerEntryPoint : IServerEntryPoint
     {
@@ -35,7 +35,6 @@ namespace Emby.Server.Implementations.EntryPoints
         private readonly IConfiguration _config;
         private readonly IConfigurationManager _configurationManager;
         private readonly INetworkManager _networkManager;
-        private readonly bool _enableMultiSocketBinding;
 
         /// <summary>
         /// The UDP server.
@@ -65,7 +64,6 @@ namespace Emby.Server.Implementations.EntryPoints
             _configurationManager = configurationManager;
             _networkManager = networkManager;
             _udpServers = new List<UdpServer>();
-            _enableMultiSocketBinding = OperatingSystem.IsWindows() || OperatingSystem.IsLinux();
         }
 
         /// <inheritdoc />
@@ -80,14 +78,16 @@ namespace Emby.Server.Implementations.EntryPoints
 
             try
             {
-                if (_enableMultiSocketBinding)
+                // Linux needs to bind to the broadcast addresses to get broadcast traffic
+                // Windows receives broadcast fine when binding to just the interface, it is unable to bind to broadcast addresses
+                if (OperatingSystem.IsLinux())
                 {
-                    // Add global broadcast socket
+                    // Add global broadcast listener
                     var server = new UdpServer(_logger, _appHost, _config, IPAddress.Broadcast, PortNumber);
                     server.Start(_cancellationTokenSource.Token);
                     _udpServers.Add(server);
 
-                    // Add bind address specific broadcast sockets
+                    // Add bind address specific broadcast listeners
                     // IPv6 is currently unsupported
                     var validInterfaces = _networkManager.GetInternalBindAddresses().Where(i => i.AddressFamily == AddressFamily.InterNetwork);
                     foreach (var intf in validInterfaces)
@@ -102,9 +102,18 @@ namespace Emby.Server.Implementations.EntryPoints
                 }
                 else
                 {
-                    var server = new UdpServer(_logger, _appHost, _config, IPAddress.Any, PortNumber);
-                    server.Start(_cancellationTokenSource.Token);
-                    _udpServers.Add(server);
+                    // Add bind address specific broadcast listeners
+                    // IPv6 is currently unsupported
+                    var validInterfaces = _networkManager.GetInternalBindAddresses().Where(i => i.AddressFamily == AddressFamily.InterNetwork);
+                    foreach (var intf in validInterfaces)
+                    {
+                        var intfAddress = intf.Address;
+                        _logger.LogDebug("Binding UDP server to {Address} on port {PortNumber}", intfAddress, PortNumber);
+
+                        var server = new UdpServer(_logger, _appHost, _config, intfAddress, PortNumber);
+                        server.Start(_cancellationTokenSource.Token);
+                        _udpServers.Add(server);
+                    }
                 }
             }
             catch (SocketException ex)
@@ -119,7 +128,7 @@ namespace Emby.Server.Implementations.EntryPoints
         {
             if (_disposed)
             {
-                throw new ObjectDisposedException(this.GetType().Name);
+                throw new ObjectDisposedException(GetType().Name);
             }
         }
 
diff --git a/Emby.Server.Implementations/IO/ManagedFileSystem.cs b/Emby.Server.Implementations/IO/ManagedFileSystem.cs
index 79eca4022..c380d67db 100644
--- a/Emby.Server.Implementations/IO/ManagedFileSystem.cs
+++ b/Emby.Server.Implementations/IO/ManagedFileSystem.cs
@@ -103,15 +103,17 @@ namespace Emby.Server.Implementations.IO
                 return filePath;
             }
 
+            var filePathSpan = filePath.AsSpan();
+
             // relative path
             if (firstChar == '\\')
             {
-                filePath = filePath.Substring(1);
+                filePathSpan = filePathSpan.Slice(1);
             }
 
             try
             {
-                return Path.GetFullPath(Path.Combine(folderPath, filePath));
+                return Path.GetFullPath(Path.Join(folderPath, filePathSpan));
             }
             catch (ArgumentException)
             {
diff --git a/Emby.Server.Implementations/Library/LibraryManager.cs b/Emby.Server.Implementations/Library/LibraryManager.cs
index 6e6c14a51..4f0983564 100644
--- a/Emby.Server.Implementations/Library/LibraryManager.cs
+++ b/Emby.Server.Implementations/Library/LibraryManager.cs
@@ -838,19 +838,12 @@ namespace Emby.Server.Implementations.Library
         {
             var path = Person.GetPath(name);
             var id = GetItemByNameId<Person>(path);
-            if (GetItemById(id) is not Person item)
+            if (GetItemById(id) is Person item)
             {
-                item = new Person
-                {
-                    Name = name,
-                    Id = id,
-                    DateCreated = DateTime.UtcNow,
-                    DateModified = DateTime.UtcNow,
-                    Path = path
-                };
+                return item;
             }
 
-            return item;
+            return null;
         }
 
         /// <summary>
@@ -1161,7 +1154,7 @@ namespace Emby.Server.Implementations.Library
                 Name = Path.GetFileName(dir),
 
                 Locations = _fileSystem.GetFilePaths(dir, false)
-                .Where(i => string.Equals(ShortcutFileExtension, Path.GetExtension(i), StringComparison.OrdinalIgnoreCase))
+                .Where(i => Path.GetExtension(i.AsSpan()).Equals(ShortcutFileExtension, StringComparison.OrdinalIgnoreCase))
                     .Select(i =>
                     {
                         try
@@ -2899,9 +2892,18 @@ namespace Emby.Server.Implementations.Library
                 var saveEntity = false;
                 var personEntity = GetPerson(person.Name);
 
-                // if PresentationUniqueKey is empty it's likely a new item.
-                if (string.IsNullOrEmpty(personEntity.PresentationUniqueKey))
+                if (personEntity is null)
                 {
+                    var path = Person.GetPath(person.Name);
+                    personEntity = new Person()
+                    {
+                        Name = person.Name,
+                        Id = GetItemByNameId<Person>(path),
+                        DateCreated = DateTime.UtcNow,
+                        DateModified = DateTime.UtcNow,
+                        Path = path
+                    };
+
                     personEntity.PresentationUniqueKey = personEntity.CreatePresentationUniqueKey();
                     saveEntity = true;
                 }
@@ -3134,7 +3136,7 @@ namespace Emby.Server.Implementations.Library
             }
 
             var shortcut = _fileSystem.GetFilePaths(virtualFolderPath, true)
-                .Where(i => string.Equals(ShortcutFileExtension, Path.GetExtension(i), StringComparison.OrdinalIgnoreCase))
+                .Where(i => Path.GetExtension(i.AsSpan()).Equals(ShortcutFileExtension, StringComparison.OrdinalIgnoreCase))
                 .FirstOrDefault(f => _appHost.ExpandVirtualPath(_fileSystem.ResolveShortcut(f)).Equals(mediaPath, StringComparison.OrdinalIgnoreCase));
 
             if (!string.IsNullOrEmpty(shortcut))
diff --git a/Emby.Server.Implementations/Library/Resolvers/Audio/AudioResolver.cs b/Emby.Server.Implementations/Library/Resolvers/Audio/AudioResolver.cs
index a74f82475..862f144e6 100644
--- a/Emby.Server.Implementations/Library/Resolvers/Audio/AudioResolver.cs
+++ b/Emby.Server.Implementations/Library/Resolvers/Audio/AudioResolver.cs
@@ -94,9 +94,9 @@ namespace Emby.Server.Implementations.Library.Resolvers.Audio
 
             if (AudioFileParser.IsAudioFile(args.Path, _namingOptions))
             {
-                var extension = Path.GetExtension(args.Path);
+                var extension = Path.GetExtension(args.Path.AsSpan());
 
-                if (string.Equals(extension, ".cue", StringComparison.OrdinalIgnoreCase))
+                if (extension.Equals(".cue", StringComparison.OrdinalIgnoreCase))
                 {
                     // if audio file exists of same name, return null
                     return null;
@@ -128,7 +128,7 @@ namespace Emby.Server.Implementations.Library.Resolvers.Audio
 
                 if (item is not null)
                 {
-                    item.IsShortcut = string.Equals(extension, ".strm", StringComparison.OrdinalIgnoreCase);
+                    item.IsShortcut = extension.Equals(".strm", StringComparison.OrdinalIgnoreCase);
 
                     item.IsInMixedFolder = true;
                 }
diff --git a/Emby.Server.Implementations/Library/Resolvers/BaseVideoResolver.cs b/Emby.Server.Implementations/Library/Resolvers/BaseVideoResolver.cs
index 381796d0e..779cfd5be 100644
--- a/Emby.Server.Implementations/Library/Resolvers/BaseVideoResolver.cs
+++ b/Emby.Server.Implementations/Library/Resolvers/BaseVideoResolver.cs
@@ -263,7 +263,7 @@ namespace Emby.Server.Implementations.Library.Resolvers
                 return false;
             }
 
-            return directoryService.GetFilePaths(fullPath).Any(i => string.Equals(Path.GetExtension(i), ".vob", StringComparison.OrdinalIgnoreCase));
+            return directoryService.GetFilePaths(fullPath).Any(i => Path.GetExtension(i.AsSpan()).Equals(".vob", StringComparison.OrdinalIgnoreCase));
         }
 
         /// <summary>
diff --git a/Emby.Server.Implementations/Library/Resolvers/Books/BookResolver.cs b/Emby.Server.Implementations/Library/Resolvers/Books/BookResolver.cs
index 042422c6f..73861ff59 100644
--- a/Emby.Server.Implementations/Library/Resolvers/Books/BookResolver.cs
+++ b/Emby.Server.Implementations/Library/Resolvers/Books/BookResolver.cs
@@ -32,9 +32,9 @@ namespace Emby.Server.Implementations.Library.Resolvers.Books
                 return GetBook(args);
             }
 
-            var extension = Path.GetExtension(args.Path);
+            var extension = Path.GetExtension(args.Path.AsSpan());
 
-            if (extension is not null && _validExtensions.Contains(extension, StringComparison.OrdinalIgnoreCase))
+            if (_validExtensions.Contains(extension, StringComparison.OrdinalIgnoreCase))
             {
                 // It's a book
                 return new Book
@@ -51,12 +51,11 @@ namespace Emby.Server.Implementations.Library.Resolvers.Books
         {
             var bookFiles = args.FileSystemChildren.Where(f =>
             {
-                var fileExtension = Path.GetExtension(f.FullName)
-                    ?? string.Empty;
+                var fileExtension = Path.GetExtension(f.FullName.AsSpan());
 
                 return _validExtensions.Contains(
                     fileExtension,
-                    StringComparer.OrdinalIgnoreCase);
+                    StringComparison.OrdinalIgnoreCase);
             }).ToList();
 
             // Don't return a Book if there is more (or less) than one document in the directory
diff --git a/Emby.Server.Implementations/Localization/Core/ml.json b/Emby.Server.Implementations/Localization/Core/ml.json
index 0620fbcdb..0b50fa529 100644
--- a/Emby.Server.Implementations/Localization/Core/ml.json
+++ b/Emby.Server.Implementations/Localization/Core/ml.json
@@ -121,5 +121,7 @@
     "TaskOptimizeDatabaseDescription": "ഡാറ്റാബേസ് ചുരുക്കുകയും സ്വതന്ത്ര ഇടം വെട്ടിച്ചുരുക്കുകയും ചെയ്യുന്നു. ലൈബ്രറി സ്‌കാൻ ചെയ്‌തതിനുശേഷം അല്ലെങ്കിൽ ഡാറ്റാബേസ് പരിഷ്‌ക്കരണങ്ങളെ സൂചിപ്പിക്കുന്ന മറ്റ് മാറ്റങ്ങൾ ചെയ്‌തതിന് ശേഷം ഈ ടാസ്‌ക് പ്രവർത്തിപ്പിക്കുന്നത് പ്രകടനം മെച്ചപ്പെടുത്തും.",
     "TaskOptimizeDatabase": "ഡാറ്റാബേസ് ഒപ്റ്റിമൈസ് ചെയ്യുക",
     "HearingImpaired": "കേൾവി തകരാറുകൾ",
-    "External": "പുറമേയുള്ള"
+    "External": "പുറമേയുള്ള",
+    "TaskKeyframeExtractorDescription": "കൂടുതൽ കൃത്യമായ HLS പ്ലേലിസ്റ്റുകൾ സൃഷ്‌ടിക്കുന്നതിന് വീഡിയോ ഫയലുകളിൽ നിന്ന് കീഫ്രെയിമുകൾ എക്‌സ്‌ട്രാക്‌റ്റ് ചെയ്യുന്നു. ഈ പ്രവർത്തനം പൂർത്തിയാവാൻ കുറച്ചധികം സമയം എടുത്തേക്കാം.",
+    "TaskKeyframeExtractor": "കീഫ്രെയിം എക്സ്ട്രാക്റ്റർ"
 }
diff --git a/Emby.Server.Implementations/Localization/Core/sk.json b/Emby.Server.Implementations/Localization/Core/sk.json
index 858cc40dd..c231d76fe 100644
--- a/Emby.Server.Implementations/Localization/Core/sk.json
+++ b/Emby.Server.Implementations/Localization/Core/sk.json
@@ -124,5 +124,5 @@
     "TaskKeyframeExtractorDescription": "Extrahuje kľúčové snímky z video súborov na vytvorenie presnejších HLS playlistov. Táto úloha môže trvať dlhšiu dobu.",
     "TaskKeyframeExtractor": "Extraktor kľúčových snímkov",
     "External": "Externé",
-    "HearingImpaired": "Sluchovo Postihnutý"
+    "HearingImpaired": "Sluchovo postihnutí"
 }
diff --git a/Emby.Server.Implementations/MediaEncoder/EncodingManager.cs b/Emby.Server.Implementations/MediaEncoder/EncodingManager.cs
index 7732e32d0..896f47923 100644
--- a/Emby.Server.Implementations/MediaEncoder/EncodingManager.cs
+++ b/Emby.Server.Implementations/MediaEncoder/EncodingManager.cs
@@ -222,7 +222,7 @@ namespace Emby.Server.Implementations.MediaEncoder
         {
             var deadImages = images
                 .Except(chapters.Select(i => i.ImagePath).Where(i => !string.IsNullOrEmpty(i)), StringComparer.OrdinalIgnoreCase)
-                .Where(i => BaseItem.SupportedImageExtensions.Contains(Path.GetExtension(i), StringComparison.OrdinalIgnoreCase))
+                .Where(i => BaseItem.SupportedImageExtensions.Contains(Path.GetExtension(i.AsSpan()), StringComparison.OrdinalIgnoreCase))
                 .ToList();
 
             foreach (var image in deadImages)
diff --git a/Emby.Server.Implementations/Net/SocketFactory.cs b/Emby.Server.Implementations/Net/SocketFactory.cs
index 8478fbc4a..2bcd5eab2 100644
--- a/Emby.Server.Implementations/Net/SocketFactory.cs
+++ b/Emby.Server.Implementations/Net/SocketFactory.cs
@@ -1,12 +1,15 @@
-#pragma warning disable CS1591
-
 using System;
+using System.Linq;
 using System.Net;
+using System.Net.NetworkInformation;
 using System.Net.Sockets;
 using MediaBrowser.Model.Net;
 
 namespace Emby.Server.Implementations.Net
 {
+    /// <summary>
+    /// Factory class to create different kinds of sockets.
+    /// </summary>
     public class SocketFactory : ISocketFactory
     {
         /// <inheritdoc />
@@ -38,7 +41,8 @@ namespace Emby.Server.Implementations.Net
         /// <inheritdoc />
         public Socket CreateSsdpUdpSocket(IPData bindInterface, int localPort)
         {
-            ArgumentNullException.ThrowIfNull(bindInterface.Address);
+            var interfaceAddress = bindInterface.Address;
+            ArgumentNullException.ThrowIfNull(interfaceAddress);
 
             if (localPort < 0)
             {
@@ -49,7 +53,7 @@ namespace Emby.Server.Implementations.Net
             try
             {
                 socket.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.ReuseAddress, true);
-                socket.Bind(new IPEndPoint(bindInterface.Address, localPort));
+                socket.Bind(new IPEndPoint(interfaceAddress, localPort));
 
                 return socket;
             }
@@ -82,16 +86,25 @@ namespace Emby.Server.Implementations.Net
 
             try
             {
-                var interfaceIndex = bindInterface.Index;
-                var interfaceIndexSwapped = IPAddress.HostToNetworkOrder(interfaceIndex);
-
                 socket.MulticastLoopback = false;
                 socket.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.ReuseAddress, true);
                 socket.SetSocketOption(SocketOptionLevel.IP, SocketOptionName.PacketInformation, true);
                 socket.SetSocketOption(SocketOptionLevel.IP, SocketOptionName.MulticastTimeToLive, multicastTimeToLive);
-                socket.SetSocketOption(SocketOptionLevel.IP, SocketOptionName.MulticastInterface, interfaceIndexSwapped);
-                socket.SetSocketOption(SocketOptionLevel.IP, SocketOptionName.AddMembership, new MulticastOption(multicastAddress, interfaceIndex));
-                socket.Bind(new IPEndPoint(multicastAddress, localPort));
+
+                if (OperatingSystem.IsLinux() || OperatingSystem.IsMacOS())
+                {
+                    socket.SetSocketOption(SocketOptionLevel.IP, SocketOptionName.AddMembership, new MulticastOption(multicastAddress));
+                    socket.Bind(new IPEndPoint(multicastAddress, localPort));
+                }
+                else
+                {
+                    // Only create socket if interface supports multicast
+                    var interfaceIndex = bindInterface.Index;
+                    var interfaceIndexSwapped = IPAddress.HostToNetworkOrder(interfaceIndex);
+
+                    socket.SetSocketOption(SocketOptionLevel.IP, SocketOptionName.AddMembership, new MulticastOption(multicastAddress, interfaceIndex));
+                    socket.Bind(new IPEndPoint(bindIPAddress, localPort));
+                }
 
                 return socket;
             }
diff --git a/Emby.Server.Implementations/Playlists/PlaylistManager.cs b/Emby.Server.Implementations/Playlists/PlaylistManager.cs
index 0cb450cdf..649c49924 100644
--- a/Emby.Server.Implementations/Playlists/PlaylistManager.cs
+++ b/Emby.Server.Implementations/Playlists/PlaylistManager.cs
@@ -327,9 +327,9 @@ namespace Emby.Server.Implementations.Playlists
             // this is probably best done as a metadata provider
             // saving a file over itself will require some work to prevent this from happening when not needed
             var playlistPath = item.Path;
-            var extension = Path.GetExtension(playlistPath);
+            var extension = Path.GetExtension(playlistPath.AsSpan());
 
-            if (string.Equals(".wpl", extension, StringComparison.OrdinalIgnoreCase))
+            if (extension.Equals(".wpl", StringComparison.OrdinalIgnoreCase))
             {
                 var playlist = new WplPlaylist();
                 foreach (var child in item.GetLinkedChildren())
@@ -362,8 +362,7 @@ namespace Emby.Server.Implementations.Playlists
                 string text = new WplContent().ToText(playlist);
                 File.WriteAllText(playlistPath, text);
             }
-
-            if (string.Equals(".zpl", extension, StringComparison.OrdinalIgnoreCase))
+            else if (extension.Equals(".zpl", StringComparison.OrdinalIgnoreCase))
             {
                 var playlist = new ZplPlaylist();
                 foreach (var child in item.GetLinkedChildren())
@@ -396,8 +395,7 @@ namespace Emby.Server.Implementations.Playlists
                 string text = new ZplContent().ToText(playlist);
                 File.WriteAllText(playlistPath, text);
             }
-
-            if (string.Equals(".m3u", extension, StringComparison.OrdinalIgnoreCase))
+            else if (extension.Equals(".m3u", StringComparison.OrdinalIgnoreCase))
             {
                 var playlist = new M3uPlaylist
                 {
@@ -428,8 +426,7 @@ namespace Emby.Server.Implementations.Playlists
                 string text = new M3uContent().ToText(playlist);
                 File.WriteAllText(playlistPath, text);
             }
-
-            if (string.Equals(".m3u8", extension, StringComparison.OrdinalIgnoreCase))
+            else if (extension.Equals(".m3u8", StringComparison.OrdinalIgnoreCase))
             {
                 var playlist = new M3uPlaylist();
                 playlist.IsExtended = true;
@@ -458,8 +455,7 @@ namespace Emby.Server.Implementations.Playlists
                 string text = new M3uContent().ToText(playlist);
                 File.WriteAllText(playlistPath, text);
             }
-
-            if (string.Equals(".pls", extension, StringComparison.OrdinalIgnoreCase))
+            else if (extension.Equals(".pls", StringComparison.OrdinalIgnoreCase))
             {
                 var playlist = new PlsPlaylist();
                 foreach (var child in item.GetLinkedChildren())
diff --git a/Emby.Server.Implementations/SystemManager.cs b/Emby.Server.Implementations/SystemManager.cs
new file mode 100644
index 000000000..af66b62e3
--- /dev/null
+++ b/Emby.Server.Implementations/SystemManager.cs
@@ -0,0 +1,103 @@
+using System;
+using System.Linq;
+using System.Threading.Tasks;
+using MediaBrowser.Common.Configuration;
+using MediaBrowser.Common.Updates;
+using MediaBrowser.Controller;
+using MediaBrowser.Controller.Configuration;
+using MediaBrowser.Model.System;
+using Microsoft.AspNetCore.Http;
+using Microsoft.Extensions.Hosting;
+
+namespace Emby.Server.Implementations;
+
+/// <inheritdoc />
+public class SystemManager : ISystemManager
+{
+    private readonly IHostApplicationLifetime _applicationLifetime;
+    private readonly IServerApplicationHost _applicationHost;
+    private readonly IServerApplicationPaths _applicationPaths;
+    private readonly IServerConfigurationManager _configurationManager;
+    private readonly IStartupOptions _startupOptions;
+    private readonly IInstallationManager _installationManager;
+
+    /// <summary>
+    /// Initializes a new instance of the <see cref="SystemManager"/> class.
+    /// </summary>
+    /// <param name="applicationLifetime">Instance of <see cref="IHostApplicationLifetime"/>.</param>
+    /// <param name="applicationHost">Instance of <see cref="IServerApplicationHost"/>.</param>
+    /// <param name="applicationPaths">Instance of <see cref="IServerApplicationPaths"/>.</param>
+    /// <param name="configurationManager">Instance of <see cref="IServerConfigurationManager"/>.</param>
+    /// <param name="startupOptions">Instance of <see cref="IStartupOptions"/>.</param>
+    /// <param name="installationManager">Instance of <see cref="IInstallationManager"/>.</param>
+    public SystemManager(
+        IHostApplicationLifetime applicationLifetime,
+        IServerApplicationHost applicationHost,
+        IServerApplicationPaths applicationPaths,
+        IServerConfigurationManager configurationManager,
+        IStartupOptions startupOptions,
+        IInstallationManager installationManager)
+    {
+        _applicationLifetime = applicationLifetime;
+        _applicationHost = applicationHost;
+        _applicationPaths = applicationPaths;
+        _configurationManager = configurationManager;
+        _startupOptions = startupOptions;
+        _installationManager = installationManager;
+    }
+
+    /// <inheritdoc />
+    public SystemInfo GetSystemInfo(HttpRequest request)
+    {
+        return new SystemInfo
+        {
+            HasPendingRestart = _applicationHost.HasPendingRestart,
+            IsShuttingDown = _applicationLifetime.ApplicationStopping.IsCancellationRequested,
+            Version = _applicationHost.ApplicationVersionString,
+            WebSocketPortNumber = _applicationHost.HttpPort,
+            CompletedInstallations = _installationManager.CompletedInstallations.ToArray(),
+            Id = _applicationHost.SystemId,
+            ProgramDataPath = _applicationPaths.ProgramDataPath,
+            WebPath = _applicationPaths.WebPath,
+            LogPath = _applicationPaths.LogDirectoryPath,
+            ItemsByNamePath = _applicationPaths.InternalMetadataPath,
+            InternalMetadataPath = _applicationPaths.InternalMetadataPath,
+            CachePath = _applicationPaths.CachePath,
+            TranscodingTempPath = _configurationManager.GetTranscodePath(),
+            ServerName = _applicationHost.FriendlyName,
+            LocalAddress = _applicationHost.GetSmartApiUrl(request),
+            SupportsLibraryMonitor = true,
+            PackageName = _startupOptions.PackageName
+        };
+    }
+
+    /// <inheritdoc />
+    public PublicSystemInfo GetPublicSystemInfo(HttpRequest request)
+    {
+        return new PublicSystemInfo
+        {
+            Version = _applicationHost.ApplicationVersionString,
+            ProductName = _applicationHost.Name,
+            Id = _applicationHost.SystemId,
+            ServerName = _applicationHost.FriendlyName,
+            LocalAddress = _applicationHost.GetSmartApiUrl(request),
+            StartupWizardCompleted = _configurationManager.CommonConfiguration.IsStartupWizardCompleted
+        };
+    }
+
+    /// <inheritdoc />
+    public void Restart() => ShutdownInternal(true);
+
+    /// <inheritdoc />
+    public void Shutdown() => ShutdownInternal(false);
+
+    private void ShutdownInternal(bool restart)
+    {
+        Task.Run(async () =>
+        {
+            await Task.Delay(100).ConfigureAwait(false);
+            _applicationHost.ShouldRestart = restart;
+            _applicationLifetime.StopApplication();
+        });
+    }
+}
diff --git a/Emby.Server.Implementations/Udp/UdpServer.cs b/Emby.Server.Implementations/Udp/UdpServer.cs
index bda2c2f31..2d806c146 100644
--- a/Emby.Server.Implementations/Udp/UdpServer.cs
+++ b/Emby.Server.Implementations/Udp/UdpServer.cs
@@ -52,7 +52,10 @@ namespace Emby.Server.Implementations.Udp
 
             _endpoint = new IPEndPoint(bindAddress, port);
 
-            _udpSocket = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
+            _udpSocket = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp)
+            {
+                MulticastLoopback = false,
+            };
             _udpSocket.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.ReuseAddress, true);
         }
 
@@ -74,6 +77,7 @@ namespace Emby.Server.Implementations.Udp
 
             try
             {
+                _logger.LogDebug("Sending AutoDiscovery response");
                 await _udpSocket.SendToAsync(JsonSerializer.SerializeToUtf8Bytes(response), SocketFlags.None, endpoint, cancellationToken).ConfigureAwait(false);
             }
             catch (SocketException ex)
@@ -99,7 +103,8 @@ namespace Emby.Server.Implementations.Udp
             {
                 try
                 {
-                    var result = await _udpSocket.ReceiveFromAsync(_receiveBuffer, SocketFlags.None, _endpoint, cancellationToken).ConfigureAwait(false);
+                    var endpoint = (EndPoint)new IPEndPoint(IPAddress.Any, 0);
+                    var result = await _udpSocket.ReceiveFromAsync(_receiveBuffer, endpoint, cancellationToken).ConfigureAwait(false);
                     var text = Encoding.UTF8.GetString(_receiveBuffer, 0, result.ReceivedBytes);
                     if (text.Contains("who is JellyfinServer?", StringComparison.OrdinalIgnoreCase))
                     {
@@ -112,7 +117,7 @@ namespace Emby.Server.Implementations.Udp
                 }
                 catch (OperationCanceledException)
                 {
-                    // Don't throw
+                    _logger.LogDebug("Broadcast socket operation cancelled");
                 }
             }
         }
diff --git a/Emby.Server.Implementations/Updates/InstallationManager.cs b/Emby.Server.Implementations/Updates/InstallationManager.cs
index 38c3fb4fa..3b4ecc962 100644
--- a/Emby.Server.Implementations/Updates/InstallationManager.cs
+++ b/Emby.Server.Implementations/Updates/InstallationManager.cs
@@ -504,8 +504,7 @@ namespace Emby.Server.Implementations.Updates
 
         private async Task PerformPackageInstallation(InstallationInfo package, PluginStatus status, CancellationToken cancellationToken)
         {
-            var extension = Path.GetExtension(package.SourceUrl);
-            if (!string.Equals(extension, ".zip", StringComparison.OrdinalIgnoreCase))
+            if (!Path.GetExtension(package.SourceUrl.AsSpan()).Equals(".zip", StringComparison.OrdinalIgnoreCase))
             {
                 _logger.LogError("Only zip packages are supported. {SourceUrl} is not a zip archive.", package.SourceUrl);
                 return;