v1.2.73 (#231)

Significant changes include LDN functionality from @Vudjun (no more
separate build!) and an XCI trimmer from @amurgshere.

Merged PRs in this release (in the order they were merged): 
#183, #150, #105, #160, #188, #98, #158, #13, #216, #73, #217, #122,
#228, #65, #226, #236, #247, #243, #249, #242, #260, #273, #272, #262,
#259, #241

## Versioning:
There now exists "stable" (release branch) and ["canary" (master
branch)](https://github.com/GreemDev/Ryujinx-Canary/releases) versions.
Instead of everyone using the same emulator, getting updates for every
code change, you now *opt-in* to the more frequent updates by using the
Canary version. Use stable and you'll get about an update a week, but
that update will be MUCH more significant as it's the entire previous
week's changes & PR merges.

## LDN
LDN functionality is now merged! Use
[this](https://github.com/GreemDev/Ryujinx/wiki/Multiplayer%E2%80%90(LDN%E2%80%90Local%E2%80%90Wireless)%E2%80%90Guide)
to get started.
Please note that LDN is only for local wireless; **this is not a
Nintendo Switch Online emulation feature**.

## UI
  - Added an XCI trimmer (#105).
- You can use this feature to trim dead bytes & the embedded firmware
out of your dumped XCIs, to make them smaller.
- If you right-click an XCI and the trim button it is greyed out, that
means your XCI is already as small as possible.
  - Fix for fullscreen not being really fullscreen (#150)
  - Fix window sizing calculations when Show Title Bar is enabled (#247)
- The "Install/Uninstall file types" buttons will be enabled/disabled
depending on which one you contextually need; install will be clickable
when they aren't installed, and vice versa.
- Fix for showing default config screen when swapping players in
controller settings (#122)
- Command-line argument to prevent update checking `--hide-updates`
(#272)
  - # RPC: 
    - Added a LOT of game images to Discord RPC.
    - Play time will now show the time unit hours at a maximum.

## Localization
- Update outdated/incorrect & added missing translations for zh-TW
(#158)
  - Add many missing locale strings to all languages (#160)
  - Update & improve Korean translation (#226)
  - Minor fixes & add missing translations to Spanish translation (#242)

## Headless
- Added `ignore-controller-applet` as an option you can configure via
headless command-line options.

## Graphics Backend
  - ### Vulkan
    - fix divide-by-zero when recovering from missed draw (#235) 
      - fixes crash in 'Baldo: The Guardian Owls' opening cutscene
    
## Horizon
- fix crash that occurs when launching an NSP forwarder generated by
Nro2Nsp (#237)

# Nerd Zone
Slightly more technical information. If you don't understand what's
under here, no worry.

- Updater now uses the release's Tag Name instead of its Name for
version checking.
- Baked in value change logging into ReactiveObject.
- Split ConfigurationState into 3, smaller partial classes of the same
name.
- Specify if the current version is Canary in the version log line

---------

Co-authored-by: James Duarte <GarnetSunset@users.noreply.github.com>
Co-authored-by: Luke Warner <65521430+LukeWarnut@users.noreply.github.com>
Co-authored-by: TheToid <amurgshere@gmail.com>
Co-authored-by: GabCoolGuy <gabrielfreville@proton.me>
Co-authored-by: Kekschen <52585984+Kek5chen@users.noreply.github.com>
Co-authored-by: WilliamWsyHK <WilliamWsyHK@users.noreply.github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Jacobwasbeast <38381609+Jacobwasbeast@users.noreply.github.com>
Co-authored-by: Piplup <100526773+piplup55@users.noreply.github.com>
Co-authored-by: Vladimir Sokolov <tehnicalmailone@gmail.com>
Co-authored-by: Jonas Henriksson <gr3ger@gmail.com>
Co-authored-by: Vudjun <Vudjun@users.noreply.github.com>
Co-authored-by: extherian <extherian@gmail.com>
Co-authored-by: Hack茶ん <120134269+Hackjjang@users.noreply.github.com>
Co-authored-by: EmulationEnjoyer <144477224+EmulationEnjoyer@users.noreply.github.com>
Co-authored-by: Nicola <61830443+nicola02nb@users.noreply.github.com>
Co-authored-by: jzumaran <juan.zumaran@gitz.cl>
Co-authored-by: Pitchoune <yrigaud@icloud.com>
Co-authored-by: Narugakuruga <31060534+Narugakuruga@users.noreply.github.com>

src/ARMeilleure/Translation/Dominance.cs

@@ -77,7 +77,7 @@ namespace ARMeilleure.Translation
                 {
                     continue;
                 }
-
+                
                 for (int pBlkIndex = 0; pBlkIndex < block.Predecessors.Count; pBlkIndex++)
                 {
                     BasicBlock current = block.Predecessors[pBlkIndex];

src/ARMeilleure/Translation/PTC/Ptc.cs

@@ -13,6 +13,7 @@ using System.Collections.Generic;
 using System.Diagnostics;
 using System.IO;
 using System.IO.Compression;
+using System.Linq;
 using System.Runtime;
 using System.Runtime.CompilerServices;
 using System.Runtime.InteropServices;
@@ -848,18 +849,15 @@ namespace ARMeilleure.Translation.PTC
                 }
             }
 
-            List<Thread> threads = new();
 
-            for (int i = 0; i < degreeOfParallelism; i++)
-            {
-                Thread thread = new(TranslateFuncs)
-                {
-                    IsBackground = true,
-                    Name = "Ptc.TranslateThread." + i
-                };
-
-                threads.Add(thread);
-            }
+            List<Thread> threads = Enumerable.Range(0, degreeOfParallelism)
+                .Select(idx => 
+                    new Thread(TranslateFuncs)
+                    {
+                        IsBackground = true, 
+                        Name = "Ptc.TranslateThread." + idx 
+                    }
+                ).ToList();
 
             Stopwatch sw = Stopwatch.StartNew();
 

src/Ryujinx.Common/Configuration/Multiplayer/MultiplayerMode.cs

@@ -3,6 +3,7 @@ namespace Ryujinx.Common.Configuration.Multiplayer
     public enum MultiplayerMode
     {
         Disabled,
+        LdnRyu,
         LdnMitm,
     }
 }

src/Ryujinx.Common/Logging/LogClass.cs

@@ -72,5 +72,6 @@ namespace Ryujinx.Common.Logging
         TamperMachine,
         UI,
         Vic,
+        XCIFileTrimmer
     }
 }

src/Ryujinx.Common/Logging/Targets/AsyncLogTargetWrapper.cs

@@ -30,10 +30,10 @@ namespace Ryujinx.Common.Logging.Targets
         string ILogTarget.Name { get => _target.Name; }
 
         public AsyncLogTargetWrapper(ILogTarget target)
-            : this(target, -1, AsyncLogTargetOverflowAction.Block)
+            : this(target, -1)
         { }
 
-        public AsyncLogTargetWrapper(ILogTarget target, int queueLimit, AsyncLogTargetOverflowAction overflowAction)
+        public AsyncLogTargetWrapper(ILogTarget target, int queueLimit = -1, AsyncLogTargetOverflowAction overflowAction = AsyncLogTargetOverflowAction.Block)
         {
             _target = target;
             _messageQueue = new BlockingCollection<LogEventArgs>(queueLimit);

src/Ryujinx.Common/Logging/Targets/FileLogTarget.cs

@@ -47,7 +47,7 @@ namespace Ryujinx.Common.Logging.Targets
             }
 
             // Clean up old logs, should only keep 3
-            FileInfo[] files = logDir.GetFiles("*.log").OrderBy((info => info.CreationTime)).ToArray();
+            FileInfo[] files = logDir.GetFiles("*.log").OrderBy(info => info.CreationTime).ToArray();
             for (int i = 0; i < files.Length - 2; i++)
             {
                 try

src/Ryujinx.Common/Logging/XCIFileTrimmerLog.cs

@@ -0,0 +1,30 @@
+using Ryujinx.Common.Utilities;
+
+namespace Ryujinx.Common.Logging
+{
+    public class XCIFileTrimmerLog : XCIFileTrimmer.ILog
+    {
+        public virtual void Progress(long current, long total, string text, bool complete)
+        {
+        }
+
+        public void Write(XCIFileTrimmer.LogType logType, string text)
+        {
+            switch (logType)
+            {
+                case XCIFileTrimmer.LogType.Info:
+                    Logger.Notice.Print(LogClass.XCIFileTrimmer, text);
+                    break;
+                case XCIFileTrimmer.LogType.Warn:
+                    Logger.Warning?.Print(LogClass.XCIFileTrimmer, text);
+                    break;
+                case XCIFileTrimmer.LogType.Error:
+                    Logger.Error?.Print(LogClass.XCIFileTrimmer, text);
+                    break;
+                case XCIFileTrimmer.LogType.Progress:
+                    Logger.Info?.Print(LogClass.XCIFileTrimmer, text);
+                    break;
+            }
+        }
+    }
+}

src/Ryujinx.Common/Memory/StructArrayHelpers.cs

@@ -803,18 +803,6 @@ namespace Ryujinx.Common.Memory
         public Span<T> AsSpan() => MemoryMarshal.CreateSpan(ref _e0, Length);
     }
 
-    public struct Array256<T> : IArray<T> where T : unmanaged
-    {
-        T _e0;
-        Array128<T> _other;
-        Array127<T> _other2;
-        public readonly int Length => 256;
-        public ref T this[int index] => ref AsSpan()[index];
-
-        [Pure]
-        public Span<T> AsSpan() => MemoryMarshal.CreateSpan(ref _e0, Length);
-    }
-
     public struct Array140<T> : IArray<T> where T : unmanaged
     {
         T _e0;
@@ -828,6 +816,18 @@ namespace Ryujinx.Common.Memory
         public Span<T> AsSpan() => MemoryMarshal.CreateSpan(ref _e0, Length);
     }
 
+    public struct Array256<T> : IArray<T> where T : unmanaged
+    {
+        T _e0;
+        Array128<T> _other;
+        Array127<T> _other2;
+        public readonly int Length => 256;
+        public ref T this[int index] => ref AsSpan()[index];
+
+        [Pure]
+        public Span<T> AsSpan() => MemoryMarshal.CreateSpan(ref _e0, Length);
+    }
+
     public struct Array384<T> : IArray<T> where T : unmanaged
     {
         T _e0;

src/Ryujinx.Common/ReactiveObject.cs

@@ -1,11 +1,13 @@
+using Ryujinx.Common.Logging;
 using System;
+using System.Globalization;
 using System.Threading;
 
 namespace Ryujinx.Common
 {
     public class ReactiveObject<T>
     {
-        private readonly ReaderWriterLockSlim _readerWriterLock = new();
+        private readonly ReaderWriterLockSlim _rwLock = new();
         private bool _isInitialized;
         private T _value;
 
@@ -15,15 +17,15 @@ namespace Ryujinx.Common
         {
             get
             {
-                _readerWriterLock.EnterReadLock();
+                _rwLock.EnterReadLock();
                 T value = _value;
-                _readerWriterLock.ExitReadLock();
+                _rwLock.ExitReadLock();
 
                 return value;
             }
             set
             {
-                _readerWriterLock.EnterWriteLock();
+                _rwLock.EnterWriteLock();
 
                 T oldValue = _value;
 
@@ -32,7 +34,7 @@ namespace Ryujinx.Common
                 _isInitialized = true;
                 _value = value;
 
-                _readerWriterLock.ExitWriteLock();
+                _rwLock.ExitWriteLock();
 
                 if (!oldIsInitialized || oldValue == null || !oldValue.Equals(_value))
                 {
@@ -40,12 +42,22 @@ namespace Ryujinx.Common
                 }
             }
         }
+        
+        public void LogChangesToValue(string valueName, LogClass logClass = LogClass.Configuration) 
+            => Event += (_, e) => ReactiveObjectHelper.LogValueChange(logClass, e, valueName);
 
         public static implicit operator T(ReactiveObject<T> obj) => obj.Value;
     }
 
     public static class ReactiveObjectHelper
     {
+        public static void LogValueChange<T>(LogClass logClass, ReactiveEventArgs<T> eventArgs, string valueName)
+        {
+            string message = string.Create(CultureInfo.InvariantCulture, $"{valueName} set to: {eventArgs.NewValue}");
+
+            Logger.Info?.Print(logClass, message);
+        }
+        
         public static void Toggle(this ReactiveObject<bool> rBoolean) => rBoolean.Value = !rBoolean.Value;
     }
 

src/Ryujinx.Common/ReleaseInformation.cs

@@ -5,7 +5,9 @@ namespace Ryujinx.Common
     // DO NOT EDIT, filled by CI
     public static class ReleaseInformation
     {
-        private const string FlatHubChannelOwner = "flathub";
+        private const string FlatHubChannel = "flathub";
+        private const string CanaryChannel = "canary";
+        private const string ReleaseChannel = "release";
 
         private const string BuildVersion = "%%RYUJINX_BUILD_VERSION%%";
         public const string BuildGitHash = "%%RYUJINX_BUILD_GIT_HASH%%";
@@ -13,6 +15,7 @@ namespace Ryujinx.Common
         private const string ConfigFileName = "%%RYUJINX_CONFIG_FILE_NAME%%";
 
         public const string ReleaseChannelOwner = "%%RYUJINX_TARGET_RELEASE_CHANNEL_OWNER%%";
+        public const string ReleaseChannelSourceRepo = "%%RYUJINX_TARGET_RELEASE_CHANNEL_SOURCE_REPO%%";
         public const string ReleaseChannelRepo = "%%RYUJINX_TARGET_RELEASE_CHANNEL_REPO%%";
 
         public static string ConfigName => !ConfigFileName.StartsWith("%%") ? ConfigFileName : "Config.json";
@@ -21,10 +24,15 @@ namespace Ryujinx.Common
             !BuildGitHash.StartsWith("%%") &&
             !ReleaseChannelName.StartsWith("%%") &&
             !ReleaseChannelOwner.StartsWith("%%") &&
+            !ReleaseChannelSourceRepo.StartsWith("%%") &&
             !ReleaseChannelRepo.StartsWith("%%") &&
             !ConfigFileName.StartsWith("%%");
 
-        public static bool IsFlatHubBuild => IsValid && ReleaseChannelOwner.Equals(FlatHubChannelOwner);
+        public static bool IsFlatHubBuild => IsValid && ReleaseChannelOwner.Equals(FlatHubChannel);
+
+        public static bool IsCanaryBuild => IsValid && ReleaseChannelName.Equals(CanaryChannel);
+        
+        public static bool IsReleaseBuild => IsValid && ReleaseChannelName.Equals(ReleaseChannel);
 
         public static string Version => IsValid ? BuildVersion : Assembly.GetEntryAssembly()!.GetCustomAttribute<AssemblyInformationalVersionAttribute>()?.InformationalVersion;
     }

src/Ryujinx.Common/Utilities/NetworkHelpers.cs

@@ -1,6 +1,7 @@
 using System.Buffers.Binary;
 using System.Net;
 using System.Net.NetworkInformation;
+using System.Runtime.InteropServices;
 
 namespace Ryujinx.Common.Utilities
 {
@@ -65,6 +66,11 @@ namespace Ryujinx.Common.Utilities
             return (targetProperties, targetAddressInfo);
         }
 
+        public static bool SupportsDynamicDns()
+        {
+            return RuntimeInformation.IsOSPlatform(OSPlatform.Windows);
+        }
+
         public static uint ConvertIpv4Address(IPAddress ipAddress)
         {
             return BinaryPrimitives.ReadUInt32BigEndian(ipAddress.GetAddressBytes());

src/Ryujinx.Common/Utilities/XCIFileTrimmer.cs

@@ -0,0 +1,524 @@
+// Uncomment the line below to ensure XCIFileTrimmer does not modify files
+//#define XCI_TRIMMER_READ_ONLY_MODE
+
+using Gommon;
+using System;
+using System.Collections.Generic;
+using System.Diagnostics;
+using System.IO;
+using System.Linq;
+using System.Threading;
+
+namespace Ryujinx.Common.Utilities
+{
+    public sealed class XCIFileTrimmer
+    {
+        private const long BytesInAMegabyte = 1024 * 1024;
+        private const int BufferSize = 8 * (int)BytesInAMegabyte;
+
+        private const long CartSizeMBinFormattedGB = 952;
+        private const int CartKeyAreaSize = 0x1000;
+        private const byte PaddingByte = 0xFF;
+        private const int HeaderFilePos = 0x100;
+        private const int CartSizeFilePos = 0x10D;
+        private const int DataSizeFilePos = 0x118;
+        private const string HeaderMagicValue = "HEAD";
+
+        /// <summary>
+        /// Cartridge Sizes (ByteIdentifier, SizeInGB)
+        /// </summary>
+        private static readonly Dictionary<byte, long> _cartSizesGB = new()
+        {
+            { 0xFA, 1 },
+            { 0xF8, 2 },
+            { 0xF0, 4 },
+            { 0xE0, 8 },
+            { 0xE1, 16 },
+            { 0xE2, 32 }
+        };
+
+        private static long RecordsToByte(long records)
+        {
+            return 512 + (records * 512);
+        }
+
+        public static bool CanTrim(string filename, ILog log = null)
+        {
+            if (Path.GetExtension(filename).Equals(".XCI", StringComparison.InvariantCultureIgnoreCase))
+            {
+                var trimmer = new XCIFileTrimmer(filename, log);
+                return trimmer.CanBeTrimmed;
+            }
+
+            return false;
+        }
+
+        public static bool CanUntrim(string filename, ILog log = null)
+        {
+            if (Path.GetExtension(filename).Equals(".XCI", StringComparison.InvariantCultureIgnoreCase))
+            {
+                var trimmer = new XCIFileTrimmer(filename, log);
+                return trimmer.CanBeUntrimmed;
+            }
+
+            return false;
+        }
+
+        private ILog _log;
+        private string _filename;
+        private FileStream _fileStream;
+        private BinaryReader _binaryReader;
+        private long _offsetB, _dataSizeB, _cartSizeB, _fileSizeB;
+        private bool _fileOK = true;
+        private bool _freeSpaceChecked = false;
+        private bool _freeSpaceValid = false;
+
+        public enum OperationOutcome
+        {
+            Undetermined,
+            InvalidXCIFile,
+            NoTrimNecessary,
+            NoUntrimPossible,
+            FreeSpaceCheckFailed,
+            FileIOWriteError,
+            ReadOnlyFileCannotFix,
+            FileSizeChanged,
+            Successful,
+            Cancelled
+        }
+
+        public enum LogType
+        {
+            Info,
+            Warn,
+            Error,
+            Progress
+        }
+
+        public interface ILog
+        {
+            public void Write(LogType logType, string text);
+            public void Progress(long current, long total, string text, bool complete);
+        }
+
+        public bool FileOK => _fileOK;
+        public bool Trimmed => _fileOK && FileSizeB < UntrimmedFileSizeB;
+        public bool ContainsKeyArea => _offsetB != 0;
+        public bool CanBeTrimmed => _fileOK && FileSizeB > TrimmedFileSizeB;
+        public bool CanBeUntrimmed => _fileOK && FileSizeB < UntrimmedFileSizeB;
+        public bool FreeSpaceChecked => _fileOK && _freeSpaceChecked;
+        public bool FreeSpaceValid => _fileOK && _freeSpaceValid;
+        public long DataSizeB => _dataSizeB;
+        public long CartSizeB => _cartSizeB;
+        public long FileSizeB => _fileSizeB;
+        public long DiskSpaceSavedB => CartSizeB - FileSizeB;
+        public long DiskSpaceSavingsB => CartSizeB - DataSizeB;
+        public long TrimmedFileSizeB => _offsetB + _dataSizeB;
+        public long UntrimmedFileSizeB => _offsetB + _cartSizeB;
+
+        public ILog Log
+        {
+            get => _log;
+            set => _log = value;
+        }
+
+        public String Filename
+        {
+            get => _filename;
+            set
+            {
+                _filename = value;
+                Reset();
+            }
+        }
+
+        public long Pos
+        {
+            get => _fileStream.Position;
+            set => _fileStream.Position = value;
+        }
+
+        public XCIFileTrimmer(string path, ILog log = null)
+        {
+            Log = log;
+            Filename = path;
+            ReadHeader();
+        }
+
+        public void CheckFreeSpace(CancellationToken? cancelToken = null)
+        {
+            if (FreeSpaceChecked)
+                return;
+
+            try
+            {
+                if (CanBeTrimmed)
+                {
+                    _freeSpaceValid = false;
+
+                    OpenReaders();
+
+                    try
+                    {
+                        Pos = TrimmedFileSizeB;
+                        bool freeSpaceValid = true;
+                        long readSizeB = FileSizeB - TrimmedFileSizeB;
+
+                        Stopwatch timedSw = Lambda.Timed(() =>
+                        {
+                            freeSpaceValid = CheckPadding(readSizeB, cancelToken);
+                        });
+
+                        if (timedSw.Elapsed.TotalSeconds > 0)
+                        {
+                            Log?.Write(LogType.Info, $"Checked at {readSizeB / (double)XCIFileTrimmer.BytesInAMegabyte / timedSw.Elapsed.TotalSeconds:N} Mb/sec");
+                        }
+
+                        if (freeSpaceValid)
+                            Log?.Write(LogType.Info, "Free space is valid");
+
+                        _freeSpaceValid = freeSpaceValid;
+                    }
+                    finally
+                    {
+                        CloseReaders();
+                    }
+
+                }
+                else
+                {
+                    Log?.Write(LogType.Warn, "There is no free space to check.");
+                    _freeSpaceValid = false;
+                }
+            }
+            finally
+            {
+                _freeSpaceChecked = true;
+            }
+        }
+
+        private bool CheckPadding(long readSizeB, CancellationToken? cancelToken = null)
+        {
+            long maxReads = readSizeB / XCIFileTrimmer.BufferSize;
+            long read = 0;
+            var buffer = new byte[BufferSize];
+
+            while (true)
+            {
+                if (cancelToken.HasValue && cancelToken.Value.IsCancellationRequested) 
+                {
+                    return false;
+                }
+
+                int bytes = _fileStream.Read(buffer, 0, XCIFileTrimmer.BufferSize);
+                if (bytes == 0)
+                    break;
+
+                Log?.Progress(read, maxReads, "Verifying file can be trimmed", false);
+                if (buffer.Take(bytes).AsParallel().Any(b => b != XCIFileTrimmer.PaddingByte))
+                {
+                    Log?.Write(LogType.Warn, "Free space is NOT valid");
+                    return false;
+                }
+
+                read++;
+            }
+
+            return true;
+        }
+
+        private void Reset()
+        {
+            _freeSpaceChecked = false;
+            _freeSpaceValid = false;
+            ReadHeader();
+        }
+
+        public OperationOutcome Trim(CancellationToken? cancelToken = null)
+        {
+            if (!FileOK)
+            {
+                return OperationOutcome.InvalidXCIFile;
+            }
+
+            if (!CanBeTrimmed)
+            {
+                return OperationOutcome.NoTrimNecessary;
+            }
+
+            if (!FreeSpaceChecked)
+            {
+                CheckFreeSpace(cancelToken);
+            }
+
+            if (!FreeSpaceValid)
+            {
+                if (cancelToken.HasValue && cancelToken.Value.IsCancellationRequested)
+                {
+                    return OperationOutcome.Cancelled;
+                }
+                else 
+                {
+                    return OperationOutcome.FreeSpaceCheckFailed;
+                }
+            }
+
+            Log?.Write(LogType.Info, "Trimming...");
+
+            try
+            {
+                var info = new FileInfo(Filename);
+                if ((info.Attributes & FileAttributes.ReadOnly) == FileAttributes.ReadOnly)
+                {
+                    try
+                    {
+                        Log?.Write(LogType.Info, "Attempting to remove ReadOnly attribute");
+                        File.SetAttributes(Filename, info.Attributes & ~FileAttributes.ReadOnly);
+                    }
+                    catch (Exception e)
+                    {
+                        Log?.Write(LogType.Error, e.ToString());
+                        return OperationOutcome.ReadOnlyFileCannotFix;
+                    }
+                }
+
+                if (info.Length != FileSizeB)
+                {
+                    Log?.Write(LogType.Error, "File size has changed, cannot safely trim.");
+                    return OperationOutcome.FileSizeChanged;
+                }
+
+                var outfileStream = new FileStream(_filename, FileMode.Open, FileAccess.Write, FileShare.Write);
+
+                try
+                {
+
+#if !XCI_TRIMMER_READ_ONLY_MODE
+                        outfileStream.SetLength(TrimmedFileSizeB);
+#endif
+                    return OperationOutcome.Successful;
+                }
+                finally
+                {
+                    outfileStream.Close();
+                    Reset();
+                }
+            }
+            catch (Exception e)
+            {
+                Log?.Write(LogType.Error, e.ToString());
+                return OperationOutcome.FileIOWriteError;
+            }
+        }
+
+        public OperationOutcome Untrim(CancellationToken? cancelToken = null)
+        {
+            if (!FileOK)
+            {
+                return OperationOutcome.InvalidXCIFile;
+            }
+
+            if (!CanBeUntrimmed)
+            {
+                return OperationOutcome.NoUntrimPossible;
+            }
+
+            try
+            {
+                Log?.Write(LogType.Info, "Untrimming...");
+
+                var info = new FileInfo(Filename);
+                if ((info.Attributes & FileAttributes.ReadOnly) == FileAttributes.ReadOnly)
+                {
+                    try
+                    {
+                        Log?.Write(LogType.Info, "Attempting to remove ReadOnly attribute");
+                        File.SetAttributes(Filename, info.Attributes & ~FileAttributes.ReadOnly);
+                    }
+                    catch (Exception e)
+                    {
+                        Log?.Write(LogType.Error, e.ToString());
+                        return OperationOutcome.ReadOnlyFileCannotFix;
+                    }
+                }
+
+                if (info.Length != FileSizeB)
+                {
+                    Log?.Write(LogType.Error, "File size has changed, cannot safely untrim.");
+                    return OperationOutcome.FileSizeChanged;
+                }
+
+                var outfileStream = new FileStream(_filename, FileMode.Append, FileAccess.Write, FileShare.Write);
+                long bytesToWriteB = UntrimmedFileSizeB - FileSizeB;
+
+                try
+                {
+                    Stopwatch timedSw = Lambda.Timed(() =>
+                    {
+                        WritePadding(outfileStream, bytesToWriteB, cancelToken);
+                    });
+
+                    if (timedSw.Elapsed.TotalSeconds > 0)
+                    {
+                        Log?.Write(LogType.Info, $"Wrote at {bytesToWriteB / (double)XCIFileTrimmer.BytesInAMegabyte / timedSw.Elapsed.TotalSeconds:N} Mb/sec");
+                    }
+
+                    if (cancelToken.HasValue && cancelToken.Value.IsCancellationRequested)
+                    {
+                        return OperationOutcome.Cancelled;
+                    }
+                    else 
+                    {
+                        return OperationOutcome.Successful;
+                    }
+                }
+                finally
+                {
+                    outfileStream.Close();
+                    Reset();
+                }
+            }
+            catch (Exception e)
+            {
+                Log?.Write(LogType.Error, e.ToString());
+                return OperationOutcome.FileIOWriteError;
+            }
+        }
+
+        private void WritePadding(FileStream outfileStream, long bytesToWriteB, CancellationToken? cancelToken = null)
+        {
+            long bytesLeftToWriteB = bytesToWriteB;
+            long writes = bytesLeftToWriteB / XCIFileTrimmer.BufferSize;
+            int write = 0;
+
+            try
+            {
+                var buffer = new byte[BufferSize];
+                Array.Fill<byte>(buffer, XCIFileTrimmer.PaddingByte);
+
+                while (bytesLeftToWriteB > 0)
+                {
+                    if (cancelToken.HasValue && cancelToken.Value.IsCancellationRequested)
+                    {
+                        return;
+                    }
+
+                    long bytesToWrite = Math.Min(XCIFileTrimmer.BufferSize, bytesLeftToWriteB);
+                    
+#if !XCI_TRIMMER_READ_ONLY_MODE
+                        outfileStream.Write(buffer, 0, (int)bytesToWrite);
+#endif
+
+                    bytesLeftToWriteB -= bytesToWrite;
+                    Log?.Progress(write, writes, "Writing padding data...", false);
+                    write++;
+                }
+            }
+            finally
+            {
+                Log?.Progress(write, writes, "Writing padding data...", true);
+            }
+        }
+
+        private void OpenReaders()
+        {
+            if (_binaryReader == null)
+            {
+                _fileStream = new FileStream(_filename, FileMode.Open, FileAccess.Read, FileShare.Read);
+                _binaryReader = new BinaryReader(_fileStream);
+            }
+        }
+
+        private void CloseReaders()
+        {
+            if (_binaryReader != null && _binaryReader.BaseStream != null)
+                _binaryReader.Close();
+            _binaryReader = null;
+            _fileStream = null;
+            GC.Collect();
+        }
+
+        private void ReadHeader()
+        {
+            try
+            {
+                OpenReaders();
+
+                try
+                {
+                    // Attempt without key area
+                    bool success = CheckAndReadHeader(false);
+
+                    if (!success)
+                    {
+                        // Attempt with key area
+                        success = CheckAndReadHeader(true);
+                    }
+
+                    _fileOK = success;
+                }
+                finally
+                {
+                    CloseReaders();
+                }
+            }
+            catch (Exception ex)
+            {
+                Log?.Write(LogType.Error, ex.Message);
+                _fileOK = false;
+                _dataSizeB = 0;
+                _cartSizeB = 0;
+                _fileSizeB = 0;
+                _offsetB = 0;
+            }
+        }
+
+        private bool CheckAndReadHeader(bool assumeKeyArea)
+        {
+            // Read file size
+            _fileSizeB = _fileStream.Length;
+            if (_fileSizeB < 32 * 1024)
+            {
+                Log?.Write(LogType.Error, "The source file doesn't look like an XCI file as the data size is too small");
+                return false;
+            }
+
+            // Setup offset
+            _offsetB = (long)(assumeKeyArea ? XCIFileTrimmer.CartKeyAreaSize : 0);
+
+            // Check header
+            Pos = _offsetB + XCIFileTrimmer.HeaderFilePos;
+            string head = System.Text.Encoding.ASCII.GetString(_binaryReader.ReadBytes(4));
+            if (head != XCIFileTrimmer.HeaderMagicValue)
+            {
+                if (!assumeKeyArea)
+                {
+                    Log?.Write(LogType.Warn, $"Incorrect header found, file mat contain a key area...");
+                }
+                else
+                {
+                    Log?.Write(LogType.Error, "The source file doesn't look like an XCI file as the header is corrupted");
+                }
+
+                return false;
+            }
+
+            // Read Cart Size
+            Pos = _offsetB + XCIFileTrimmer.CartSizeFilePos;
+            byte cartSizeId = _binaryReader.ReadByte();
+            if (!_cartSizesGB.TryGetValue(cartSizeId, out long cartSizeNGB))
+            {
+                Log?.Write(LogType.Error, $"The source file doesn't look like an XCI file as the Cartridge Size is incorrect (0x{cartSizeId:X2})");
+                return false;
+            }
+            _cartSizeB = cartSizeNGB * XCIFileTrimmer.CartSizeMBinFormattedGB * XCIFileTrimmer.BytesInAMegabyte;
+
+            // Read data size
+            Pos = _offsetB + XCIFileTrimmer.DataSizeFilePos;
+            long records = (long)BitConverter.ToUInt32(_binaryReader.ReadBytes(4), 0);
+            _dataSizeB = RecordsToByte(records);
+
+            return true;
+        }
+    }
+}

src/Ryujinx.Graphics.GAL/IRenderer.cs

@@ -13,7 +13,7 @@ namespace Ryujinx.Graphics.GAL
         IPipeline Pipeline { get; }
 
         IWindow Window { get; }
-        
+
         uint ProgramCount { get; }
 
         void BackgroundContextAction(Action action, bool alwaysBackground = false);

src/Ryujinx.Graphics.OpenGL/OpenGLRenderer.cs

@@ -97,7 +97,7 @@ namespace Ryujinx.Graphics.OpenGL
         public IProgram CreateProgram(ShaderSource[] shaders, ShaderInfo info)
         {
             ProgramCount++;
-            
+
             return new Program(shaders, info.FragmentOutputMap);
         }
 

src/Ryujinx.Graphics.Vulkan/VertexBufferState.cs

@@ -55,8 +55,10 @@ namespace Ryujinx.Graphics.Vulkan
             if (_handle != BufferHandle.Null)
             {
                 // May need to restride the vertex buffer.
-
-                if (gd.NeedsVertexBufferAlignment(AttributeScalarAlignment, out int alignment) && (_stride % alignment) != 0)
+                //
+                // Fix divide by zero when recovering from missed draw (Oct. 16 2024)
+                // (fixes crash in 'Baldo: The Guardian Owls' opening cutscene)
+                if (gd.NeedsVertexBufferAlignment(AttributeScalarAlignment, out int alignment) && alignment != 0 && (_stride % alignment) != 0)
                 {
                     autoBuffer = gd.BufferManager.GetAlignedVertexBuffer(cbs, _handle, _offset, _size, _stride, alignment);
 

src/Ryujinx.Graphics.Vulkan/VulkanRenderer.cs

@@ -549,7 +549,7 @@ namespace Ryujinx.Graphics.Vulkan
         public IProgram CreateProgram(ShaderSource[] sources, ShaderInfo info)
         {
             ProgramCount++;
-            
+
             bool isCompute = sources.Length == 1 && sources[0].Stage == ShaderStage.Compute;
 
             if (info.State.HasValue || isCompute)

src/Ryujinx.HLE.Generators/IpcServiceGenerator.cs

@@ -13,6 +13,7 @@ namespace Ryujinx.HLE.Generators
             var syntaxReceiver = (ServiceSyntaxReceiver)context.SyntaxReceiver;
             CodeGenerator generator = new CodeGenerator();
 
+            generator.AppendLine("#nullable enable");
             generator.AppendLine("using System;");
             generator.EnterScope($"namespace Ryujinx.HLE.HOS.Services.Sm");
             generator.EnterScope($"partial class IUserInterface");
@@ -58,6 +59,7 @@ namespace Ryujinx.HLE.Generators
 
             generator.LeaveScope();
             generator.LeaveScope();
+            generator.AppendLine("#nullable disable");            
             context.AddSource($"IUserInterface.g.cs", generator.ToString());
         }
 

src/Ryujinx.HLE/HLEConfiguration.cs

@@ -164,6 +164,21 @@ namespace Ryujinx.HLE
         /// </summary>
         public MultiplayerMode MultiplayerMode { internal get; set; }
 
+        /// <summary>
+        /// Disable P2P mode
+        /// </summary>
+        public bool MultiplayerDisableP2p { internal get; set; }
+
+        /// <summary>
+        /// Multiplayer Passphrase
+        /// </summary>
+        public string MultiplayerLdnPassphrase { internal get; set; }
+
+        /// <summary>
+        /// LDN Server
+        /// </summary>
+        public string MultiplayerLdnServer { internal get; set; }
+
         /// <summary>
         /// An action called when HLE force a refresh of output after docked mode changed.
         /// </summary>
@@ -194,7 +209,10 @@ namespace Ryujinx.HLE
                                 float audioVolume,
                                 bool useHypervisor,
                                 string multiplayerLanInterfaceId,
-                                MultiplayerMode multiplayerMode)
+                                MultiplayerMode multiplayerMode,
+                                bool multiplayerDisableP2p,
+                                string multiplayerLdnPassphrase,
+                                string multiplayerLdnServer)
         {
             VirtualFileSystem = virtualFileSystem;
             LibHacHorizonManager = libHacHorizonManager;
@@ -222,6 +240,9 @@ namespace Ryujinx.HLE
             UseHypervisor = useHypervisor;
             MultiplayerLanInterfaceId = multiplayerLanInterfaceId;
             MultiplayerMode = multiplayerMode;
+            MultiplayerDisableP2p = multiplayerDisableP2p;
+            MultiplayerLdnPassphrase = multiplayerLdnPassphrase;
+            MultiplayerLdnServer = multiplayerLdnServer;
         }
     }
 }

src/Ryujinx.HLE/HOS/Applets/AppletManager.cs

@@ -1,4 +1,6 @@
+using Ryujinx.Common.Logging;
 using Ryujinx.HLE.HOS.Applets.Browser;
+using Ryujinx.HLE.HOS.Applets.Dummy;
 using Ryujinx.HLE.HOS.Applets.Error;
 using Ryujinx.HLE.HOS.Services.Am.AppletAE;
 using System;
@@ -26,9 +28,13 @@ namespace Ryujinx.HLE.HOS.Applets
                     return new BrowserApplet(system);
                 case AppletId.LibAppletOff:
                     return new BrowserApplet(system);
+                case AppletId.MiiEdit:
+                    Logger.Warning?.Print(LogClass.Application, $"Please use the MiiEdit inside File/Open Applet");
+                    return new DummyApplet(system);
             }
 
-            throw new NotImplementedException($"{applet} applet is not implemented.");
+            Logger.Warning?.Print(LogClass.Application, $"Applet {applet} not implemented!");
+            return new DummyApplet(system);
         }
     }
 }

src/Ryujinx.HLE/HOS/Applets/Dummy/DummyApplet.cs

@@ -0,0 +1,43 @@
+using Ryujinx.Common.Logging;
+using Ryujinx.Common.Memory;
+using Ryujinx.HLE.HOS.Applets;
+using Ryujinx.HLE.HOS.Services.Am.AppletAE;
+using System;
+using System.IO;
+using System.Runtime.InteropServices;
+namespace Ryujinx.HLE.HOS.Applets.Dummy
+{
+    internal class DummyApplet : IApplet
+    {
+        private readonly Horizon _system;
+        private AppletSession _normalSession;
+        public event EventHandler AppletStateChanged;
+        public DummyApplet(Horizon system)
+        {
+            _system = system;
+        }
+        public ResultCode Start(AppletSession normalSession, AppletSession interactiveSession)
+        {
+            _normalSession = normalSession;
+            _normalSession.Push(BuildResponse());
+            AppletStateChanged?.Invoke(this, null);
+            _system.ReturnFocus();
+            return ResultCode.Success;
+        }
+        private static T ReadStruct<T>(byte[] data) where T : struct
+        {
+            return MemoryMarshal.Read<T>(data.AsSpan());
+        }
+        private static byte[] BuildResponse()
+        {
+            using MemoryStream stream = MemoryStreamManager.Shared.GetStream();
+            using BinaryWriter writer = new(stream);
+            writer.Write((ulong)ResultCode.Success);
+            return stream.ToArray();
+        }
+        public ResultCode GetResult()
+        {
+            return ResultCode.Success;
+        }
+    }
+}

src/Ryujinx.HLE/HOS/Diagnostics/Demangler/Demangler.cs

@@ -2463,7 +2463,7 @@ namespace Ryujinx.HLE.HOS.Diagnostics.Demangler
                     return ParseIntegerLiteral("unsigned short");
                 case 'i':
                     _position++;
-                    return ParseIntegerLiteral("");
+                    return ParseIntegerLiteral(string.Empty);
                 case 'j':
                     _position++;
                     return ParseIntegerLiteral("u");

src/Ryujinx.HLE/HOS/ModLoader.cs

@@ -116,18 +116,13 @@ namespace Ryujinx.HLE.HOS
         private readonly Dictionary<ulong, ModCache> _appMods; // key is ApplicationId
         private PatchCache _patches;
 
-        private static readonly EnumerationOptions _dirEnumOptions;
-
-        static ModLoader()
+        private static readonly EnumerationOptions _dirEnumOptions = new()
         {
-            _dirEnumOptions = new EnumerationOptions
-            {
-                MatchCasing = MatchCasing.CaseInsensitive,
-                MatchType = MatchType.Simple,
-                RecurseSubdirectories = false,
-                ReturnSpecialDirectories = false,
-            };
-        }
+            MatchCasing = MatchCasing.CaseInsensitive,
+            MatchType = MatchType.Simple,
+            RecurseSubdirectories = false,
+            ReturnSpecialDirectories = false,
+        };
 
         public ModLoader()
         {
@@ -169,7 +164,7 @@ namespace Ryujinx.HLE.HOS
             foreach (var modDir in dir.EnumerateDirectories())
             {
                 types.Clear();
-                Mod<DirectoryInfo> mod = new("", null, true);
+                Mod<DirectoryInfo> mod = new(string.Empty, null, true);
 
                 if (StrEquals(RomfsDir, modDir.Name))
                 {

src/Ryujinx.HLE/HOS/Services/Am/AppletAE/IAllSystemAppletProxiesService.cs

@@ -1,4 +1,5 @@
 using Ryujinx.HLE.HOS.Services.Am.AppletAE.AllSystemAppletProxiesService;
+using Ryujinx.HLE.HOS.Services.Am.AppletOE.ApplicationProxyService;
 
 namespace Ryujinx.HLE.HOS.Services.Am.AppletAE
 {
@@ -25,5 +26,14 @@ namespace Ryujinx.HLE.HOS.Services.Am.AppletAE
 
             return ResultCode.Success;
         }
+
+        [CommandCmif(350)]
+        // OpenSystemApplicationProxy(u64, pid, handle<copy>) -> object<nn::am::service::IApplicationProxy>
+        public ResultCode OpenSystemApplicationProxy(ServiceCtx context)
+        {
+            MakeObject(context, new IApplicationProxy(context.Request.HandleDesc.PId));
+
+            return ResultCode.Success;
+        }
     }
 }

src/Ryujinx.HLE/HOS/Services/Ldn/Types/NetworkConfig.cs

@@ -3,7 +3,7 @@ using System.Runtime.InteropServices;
 
 namespace Ryujinx.HLE.HOS.Services.Ldn.Types
 {
-    [StructLayout(LayoutKind.Sequential, Size = 0x20)]
+    [StructLayout(LayoutKind.Sequential, Size = 0x20, Pack = 8)]
     struct NetworkConfig
     {
         public IntentId IntentId;

src/Ryujinx.HLE/HOS/Services/Ldn/Types/ScanFilter.cs

@@ -3,7 +3,7 @@ using System.Runtime.InteropServices;
 
 namespace Ryujinx.HLE.HOS.Services.Ldn.Types
 {
-    [StructLayout(LayoutKind.Sequential, Size = 0x60)]
+    [StructLayout(LayoutKind.Sequential, Size = 0x60, Pack = 8)]
     struct ScanFilter
     {
         public NetworkId NetworkId;

src/Ryujinx.HLE/HOS/Services/Ldn/Types/SecurityConfig.cs

@@ -3,7 +3,7 @@ using System.Runtime.InteropServices;
 
 namespace Ryujinx.HLE.HOS.Services.Ldn.Types
 {
-    [StructLayout(LayoutKind.Sequential, Size = 0x44)]
+    [StructLayout(LayoutKind.Sequential, Size = 0x44, Pack = 2)]
     struct SecurityConfig
     {
         public SecurityMode SecurityMode;

src/Ryujinx.HLE/HOS/Services/Ldn/Types/SecurityParameter.cs

@@ -3,7 +3,7 @@ using System.Runtime.InteropServices;
 
 namespace Ryujinx.HLE.HOS.Services.Ldn.Types
 {
-    [StructLayout(LayoutKind.Sequential, Size = 0x20)]
+    [StructLayout(LayoutKind.Sequential, Size = 0x20, Pack = 1)]
     struct SecurityParameter
     {
         public Array16<byte> Data;

src/Ryujinx.HLE/HOS/Services/Ldn/Types/UserConfig.cs

@@ -3,7 +3,7 @@ using System.Runtime.InteropServices;
 
 namespace Ryujinx.HLE.HOS.Services.Ldn.Types
 {
-    [StructLayout(LayoutKind.Sequential, Size = 0x30)]
+    [StructLayout(LayoutKind.Sequential, Size = 0x30, Pack = 1)]
     struct UserConfig
     {
         public Array33<byte> UserName;

src/Ryujinx.HLE/HOS/Services/Ldn/UserServiceCreator/AccessPoint.cs

@@ -15,6 +15,8 @@ namespace Ryujinx.HLE.HOS.Services.Ldn.UserServiceCreator
         public Array8<NodeLatestUpdate> LatestUpdates = new();
         public bool Connected { get; private set; }
 
+        public ProxyConfig Config => _parent.NetworkClient.Config;
+
         public AccessPoint(IUserLocalCommunicationService parent)
         {
             _parent = parent;
@@ -24,9 +26,12 @@ namespace Ryujinx.HLE.HOS.Services.Ldn.UserServiceCreator
 
         public void Dispose()
         {
-            _parent.NetworkClient.DisconnectNetwork();
+            if (_parent?.NetworkClient != null)
+            {
+                _parent.NetworkClient.DisconnectNetwork();
 
-            _parent.NetworkClient.NetworkChange -= NetworkChanged;
+                _parent.NetworkClient.NetworkChange -= NetworkChanged;
+            }
         }
 
         private void NetworkChanged(object sender, NetworkChangeEventArgs e)

src/Ryujinx.HLE/HOS/Services/Ldn/UserServiceCreator/INetworkClient.cs

@@ -6,6 +6,7 @@ namespace Ryujinx.HLE.HOS.Services.Ldn.UserServiceCreator
 {
     interface INetworkClient : IDisposable
     {
+        ProxyConfig Config { get; }
         bool NeedsRealId { get; }
 
         event EventHandler<NetworkChangeEventArgs> NetworkChange;

src/Ryujinx.HLE/HOS/Services/Ldn/UserServiceCreator/IUserLocalCommunicationService.cs

@@ -9,6 +9,8 @@ using Ryujinx.HLE.HOS.Ipc;
 using Ryujinx.HLE.HOS.Kernel.Threading;
 using Ryujinx.HLE.HOS.Services.Ldn.Types;
 using Ryujinx.HLE.HOS.Services.Ldn.UserServiceCreator.LdnMitm;
+using Ryujinx.HLE.HOS.Services.Ldn.UserServiceCreator.LdnRyu;
+using Ryujinx.HLE.HOS.Services.Ldn.UserServiceCreator.Types;
 using Ryujinx.Horizon.Common;
 using Ryujinx.Memory;
 using System;
@@ -21,6 +23,9 @@ namespace Ryujinx.HLE.HOS.Services.Ldn.UserServiceCreator
 {
     class IUserLocalCommunicationService : IpcService, IDisposable
     {
+        public static string DefaultLanPlayHost = "ryuldn.vudjun.com";
+        public static short LanPlayPort = 30456;
+
         public INetworkClient NetworkClient { get; private set; }
 
         private const int NifmRequestID = 90;
@@ -175,19 +180,37 @@ namespace Ryujinx.HLE.HOS.Services.Ldn.UserServiceCreator
 
             if (_state == NetworkState.AccessPointCreated || _state == NetworkState.StationConnected)
             {
-                (_, UnicastIPAddressInformation unicastAddress) = NetworkHelpers.GetLocalInterface(context.Device.Configuration.MultiplayerLanInterfaceId);
-
-                if (unicastAddress == null)
+                ProxyConfig config = _state switch
                 {
-                    context.ResponseData.Write(NetworkHelpers.ConvertIpv4Address(DefaultIPAddress));
-                    context.ResponseData.Write(NetworkHelpers.ConvertIpv4Address(DefaultSubnetMask));
+                    NetworkState.AccessPointCreated => _accessPoint.Config,
+                    NetworkState.StationConnected => _station.Config,
+
+                    _ => default
+                };
+
+                if (config.ProxyIp == 0)
+                {
+                    (_, UnicastIPAddressInformation unicastAddress) = NetworkHelpers.GetLocalInterface(context.Device.Configuration.MultiplayerLanInterfaceId);
+
+                    if (unicastAddress == null)
+                    {
+                        context.ResponseData.Write(NetworkHelpers.ConvertIpv4Address(DefaultIPAddress));
+                        context.ResponseData.Write(NetworkHelpers.ConvertIpv4Address(DefaultSubnetMask));
+                    }
+                    else
+                    {
+                        Logger.Info?.Print(LogClass.ServiceLdn, $"Console's LDN IP is \"{unicastAddress.Address}\".");
+
+                        context.ResponseData.Write(NetworkHelpers.ConvertIpv4Address(unicastAddress.Address));
+                        context.ResponseData.Write(NetworkHelpers.ConvertIpv4Address(unicastAddress.IPv4Mask));
+                    }
                 }
                 else
                 {
-                    Logger.Info?.Print(LogClass.ServiceLdn, $"Console's LDN IP is \"{unicastAddress.Address}\".");
+                    Logger.Info?.Print(LogClass.ServiceLdn, $"LDN obtained proxy IP.");
 
-                    context.ResponseData.Write(NetworkHelpers.ConvertIpv4Address(unicastAddress.Address));
-                    context.ResponseData.Write(NetworkHelpers.ConvertIpv4Address(unicastAddress.IPv4Mask));
+                    context.ResponseData.Write(config.ProxyIp);
+                    context.ResponseData.Write(config.ProxySubnetMask);
                 }
             }
             else
@@ -1066,6 +1089,27 @@ namespace Ryujinx.HLE.HOS.Services.Ldn.UserServiceCreator
 
                         switch (mode)
                         {
+                            case MultiplayerMode.LdnRyu:
+                                try
+                                {
+                                    string ldnServer = context.Device.Configuration.MultiplayerLdnServer;
+                                    if (string.IsNullOrEmpty(ldnServer))
+                                    {
+                                        ldnServer = DefaultLanPlayHost;
+                                    }
+                                    if (!IPAddress.TryParse(ldnServer, out IPAddress ipAddress))
+                                    {
+                                        ipAddress = Dns.GetHostEntry(ldnServer).AddressList[0];
+                                    }
+                                    NetworkClient = new LdnMasterProxyClient(ipAddress.ToString(), LanPlayPort, context.Device.Configuration);
+                                }
+                                catch (Exception ex)
+                                {
+                                    Logger.Error?.Print(LogClass.ServiceLdn, "Could not locate LdnRyu server. Defaulting to stubbed wireless.");
+                                    Logger.Error?.Print(LogClass.ServiceLdn, ex.Message);
+                                    NetworkClient = new LdnDisabledClient();
+                                }
+                                break;
                             case MultiplayerMode.LdnMitm:
                                 NetworkClient = new LdnMitmClient(context.Device.Configuration);
                                 break;
@@ -1103,7 +1147,7 @@ namespace Ryujinx.HLE.HOS.Services.Ldn.UserServiceCreator
             _accessPoint?.Dispose();
             _accessPoint = null;
 
-            NetworkClient?.Dispose();
+            NetworkClient?.DisconnectAndStop();
             NetworkClient = null;
         }
     }

src/Ryujinx.HLE/HOS/Services/Ldn/UserServiceCreator/LdnDisabledClient.cs

@@ -1,3 +1,4 @@
+using Ryujinx.Common.Logging;
 using Ryujinx.HLE.HOS.Services.Ldn.Types;
 using Ryujinx.HLE.HOS.Services.Ldn.UserServiceCreator.Types;
 using System;
@@ -6,12 +7,14 @@ namespace Ryujinx.HLE.HOS.Services.Ldn.UserServiceCreator
 {
     class LdnDisabledClient : INetworkClient
     {
+        public ProxyConfig Config { get; }
         public bool NeedsRealId => true;
 
         public event EventHandler<NetworkChangeEventArgs> NetworkChange;
 
         public NetworkError Connect(ConnectRequest request)
         {
+            Logger.Warning?.PrintMsg(LogClass.ServiceLdn, "Attempted to connect to a network, but Multiplayer is disabled!");
             NetworkChange?.Invoke(this, new NetworkChangeEventArgs(new NetworkInfo(), false));
 
             return NetworkError.None;
@@ -19,6 +22,7 @@ namespace Ryujinx.HLE.HOS.Services.Ldn.UserServiceCreator
 
         public NetworkError ConnectPrivate(ConnectPrivateRequest request)
         {
+            Logger.Warning?.PrintMsg(LogClass.ServiceLdn, "Attempted to connect to a network, but Multiplayer is disabled!");
             NetworkChange?.Invoke(this, new NetworkChangeEventArgs(new NetworkInfo(), false));
 
             return NetworkError.None;
@@ -26,6 +30,7 @@ namespace Ryujinx.HLE.HOS.Services.Ldn.UserServiceCreator
 
         public bool CreateNetwork(CreateAccessPointRequest request, byte[] advertiseData)
         {
+            Logger.Warning?.PrintMsg(LogClass.ServiceLdn, "Attempted to create a network, but Multiplayer is disabled!");
             NetworkChange?.Invoke(this, new NetworkChangeEventArgs(new NetworkInfo(), false));
 
             return true;
@@ -33,6 +38,7 @@ namespace Ryujinx.HLE.HOS.Services.Ldn.UserServiceCreator
 
         public bool CreateNetworkPrivate(CreateAccessPointPrivateRequest request, byte[] advertiseData)
         {
+            Logger.Warning?.PrintMsg(LogClass.ServiceLdn, "Attempted to create a network, but Multiplayer is disabled!");
             NetworkChange?.Invoke(this, new NetworkChangeEventArgs(new NetworkInfo(), false));
 
             return true;
@@ -49,6 +55,7 @@ namespace Ryujinx.HLE.HOS.Services.Ldn.UserServiceCreator
 
         public NetworkInfo[] Scan(ushort channel, ScanFilter scanFilter)
         {
+            Logger.Warning?.PrintMsg(LogClass.ServiceLdn, "Attempted to scan for networks, but Multiplayer is disabled!");
             return Array.Empty<NetworkInfo>();
         }
 

src/Ryujinx.HLE/HOS/Services/Ldn/UserServiceCreator/LdnMitm/LdnMitmClient.cs

@@ -12,6 +12,7 @@ namespace Ryujinx.HLE.HOS.Services.Ldn.UserServiceCreator.LdnMitm
     /// </summary>
     internal class LdnMitmClient : INetworkClient
     {
+        public ProxyConfig Config { get; }
         public bool NeedsRealId => false;
 
         public event EventHandler<NetworkChangeEventArgs> NetworkChange;

src/Ryujinx.HLE/HOS/Services/Ldn/UserServiceCreator/LdnRyu/IProxyClient.cs

@@ -0,0 +1,7 @@
+namespace Ryujinx.HLE.HOS.Services.Ldn.UserServiceCreator.LdnRyu
+{
+    interface IProxyClient
+    {
+        bool SendAsync(byte[] buffer);
+    }
+}

src/Ryujinx.HLE/HOS/Services/Ldn/UserServiceCreator/LdnRyu/LdnMasterProxyClient.cs

@@ -0,0 +1,645 @@
+using Ryujinx.Common.Logging;
+using Ryujinx.Common.Utilities;
+using Ryujinx.HLE.HOS.Services.Ldn.Types;
+using Ryujinx.HLE.HOS.Services.Ldn.UserServiceCreator.LdnRyu.Proxy;
+using Ryujinx.HLE.HOS.Services.Ldn.UserServiceCreator.LdnRyu.Types;
+using Ryujinx.HLE.HOS.Services.Ldn.UserServiceCreator.Types;
+using Ryujinx.HLE.HOS.Services.Sockets.Bsd.Proxy;
+using Ryujinx.HLE.Utilities;
+using System;
+using System.Collections.Generic;
+using System.Net;
+using System.Net.NetworkInformation;
+using System.Net.Sockets;
+using System.Text;
+using System.Threading;
+using System.Threading.Tasks;
+using TcpClient = NetCoreServer.TcpClient;
+
+namespace Ryujinx.HLE.HOS.Services.Ldn.UserServiceCreator.LdnRyu
+{
+    class LdnMasterProxyClient : TcpClient, INetworkClient, IProxyClient
+    {
+        public bool NeedsRealId => true;
+
+        private static InitializeMessage InitializeMemory = new InitializeMessage();
+
+        private const int InactiveTimeout = 6000;
+        private const int FailureTimeout = 4000;
+        private const int ScanTimeout = 1000;
+
+        private bool _useP2pProxy;
+        private NetworkError _lastError;
+
+        private readonly ManualResetEvent _connected = new ManualResetEvent(false);
+        private readonly ManualResetEvent _error = new ManualResetEvent(false);
+        private readonly ManualResetEvent _scan = new ManualResetEvent(false);
+        private readonly ManualResetEvent _reject = new ManualResetEvent(false);
+        private readonly AutoResetEvent _apConnected = new AutoResetEvent(false);
+
+        private readonly RyuLdnProtocol _protocol;
+        private readonly NetworkTimeout _timeout;
+
+        private readonly List<NetworkInfo> _availableGames = new List<NetworkInfo>();
+        private DisconnectReason _disconnectReason;
+
+        private P2pProxyServer _hostedProxy;
+        private P2pProxyClient _connectedProxy;
+
+        private bool _networkConnected;
+
+        private string _passphrase;
+        private byte[] _gameVersion = new byte[0x10];
+
+        private readonly HLEConfiguration _config;
+
+        public event EventHandler<NetworkChangeEventArgs> NetworkChange;
+
+        public ProxyConfig Config { get; private set; }
+
+        public LdnMasterProxyClient(string address, int port, HLEConfiguration config) : base(address, port)
+        {
+            if (ProxyHelpers.SupportsNoDelay())
+            {
+                OptionNoDelay = true;
+            }
+
+            _protocol = new RyuLdnProtocol();
+            _timeout = new NetworkTimeout(InactiveTimeout, TimeoutConnection);
+
+            _protocol.Initialize += HandleInitialize;
+            _protocol.Connected += HandleConnected;
+            _protocol.Reject += HandleReject;
+            _protocol.RejectReply += HandleRejectReply;
+            _protocol.SyncNetwork += HandleSyncNetwork;
+            _protocol.ProxyConfig += HandleProxyConfig;
+            _protocol.Disconnected += HandleDisconnected;
+
+            _protocol.ScanReply += HandleScanReply;
+            _protocol.ScanReplyEnd += HandleScanReplyEnd;
+            _protocol.ExternalProxy += HandleExternalProxy;
+
+            _protocol.Ping += HandlePing;
+            _protocol.NetworkError += HandleNetworkError;
+
+            _config = config;
+            _useP2pProxy = !config.MultiplayerDisableP2p;
+        }
+
+        private void TimeoutConnection()
+        {
+            _connected.Reset();
+
+            DisconnectAsync();
+
+            while (IsConnected)
+            {
+                Thread.Yield();
+            }
+        }
+
+        private bool EnsureConnected()
+        {
+            if (IsConnected)
+            {
+                return true;
+            }
+
+            _error.Reset();
+
+            ConnectAsync();
+
+            int index = WaitHandle.WaitAny(new WaitHandle[] { _connected, _error }, FailureTimeout);
+
+            if (IsConnected)
+            {
+                SendAsync(_protocol.Encode(PacketId.Initialize, InitializeMemory));
+            }
+
+            return index == 0 && IsConnected;
+        }
+
+        private void UpdatePassphraseIfNeeded()
+        {
+            string passphrase = _config.MultiplayerLdnPassphrase ?? "";
+            if (passphrase != _passphrase)
+            {
+                _passphrase = passphrase;
+
+                SendAsync(_protocol.Encode(PacketId.Passphrase, StringUtils.GetFixedLengthBytes(passphrase, 0x80, Encoding.UTF8)));
+            }
+        }
+
+        protected override void OnConnected()
+        {
+            Logger.Info?.PrintMsg(LogClass.ServiceLdn, $"LDN TCP client connected a new session with Id {Id}");
+
+            UpdatePassphraseIfNeeded();
+
+            _connected.Set();
+        }
+
+        protected override void OnDisconnected()
+        {
+            Logger.Info?.PrintMsg(LogClass.ServiceLdn, $"LDN TCP client disconnected a session with Id {Id}");
+
+            _passphrase = null;
+
+            _connected.Reset();
+
+            if (_networkConnected)
+            {
+                DisconnectInternal();
+            }
+        }
+
+        public void DisconnectAndStop()
+        {
+            _timeout.Dispose();
+
+            DisconnectAsync();
+
+            while (IsConnected)
+            {
+                Thread.Yield();
+            }
+
+            Dispose();
+        }
+
+        protected override void OnReceived(byte[] buffer, long offset, long size)
+        {
+            _protocol.Read(buffer, (int)offset, (int)size);
+        }
+
+        protected override void OnError(SocketError error)
+        {
+            Logger.Info?.PrintMsg(LogClass.ServiceLdn, $"LDN TCP client caught an error with code {error}");
+
+            _error.Set();
+        }
+
+
+
+        private void HandleInitialize(LdnHeader header, InitializeMessage initialize)
+        {
+            InitializeMemory = initialize;
+        }
+
+        private void HandleExternalProxy(LdnHeader header, ExternalProxyConfig config)
+        {
+            int length = config.AddressFamily switch
+            {
+                AddressFamily.InterNetwork => 4,
+                AddressFamily.InterNetworkV6 => 16,
+                _ => 0
+            };
+
+            if (length == 0)
+            {
+                return; // Invalid external proxy.
+            }
+
+            IPAddress address = new(config.ProxyIp.AsSpan()[..length].ToArray());
+            P2pProxyClient proxy = new(address.ToString(), config.ProxyPort);
+
+            _connectedProxy = proxy;
+
+            bool success = proxy.PerformAuth(config);
+
+            if (!success)
+            {
+                DisconnectInternal();
+            }
+        }
+
+        private void HandlePing(LdnHeader header, PingMessage ping)
+        {
+            if (ping.Requester == 0) // Server requested.
+            {
+                // Send the ping message back.
+
+                SendAsync(_protocol.Encode(PacketId.Ping, ping));
+            }
+        }
+
+        private void HandleNetworkError(LdnHeader header, NetworkErrorMessage error)
+        {
+            if (error.Error == NetworkError.PortUnreachable)
+            {
+                _useP2pProxy = false;
+            }
+            else
+            {
+                _lastError = error.Error;
+            }
+        }
+
+        private NetworkError ConsumeNetworkError()
+        {
+            NetworkError result = _lastError;
+
+            _lastError = NetworkError.None;
+
+            return result;
+        }
+
+        private void HandleSyncNetwork(LdnHeader header, NetworkInfo info)
+        {
+            NetworkChange?.Invoke(this, new NetworkChangeEventArgs(info, true));
+        }
+
+        private void HandleConnected(LdnHeader header, NetworkInfo info)
+        {
+            _networkConnected = true;
+            _disconnectReason = DisconnectReason.None;
+
+            _apConnected.Set();
+
+            NetworkChange?.Invoke(this, new NetworkChangeEventArgs(info, true));
+        }
+
+        private void HandleDisconnected(LdnHeader header, DisconnectMessage message)
+        {
+            DisconnectInternal();
+        }
+
+        private void HandleReject(LdnHeader header, RejectRequest reject)
+        {
+            // When the client receives a Reject request, we have been rejected and will be disconnected shortly.
+            _disconnectReason = reject.DisconnectReason;
+        }
+
+        private void HandleRejectReply(LdnHeader header)
+        {
+            _reject.Set();
+        }
+
+        private void HandleScanReply(LdnHeader header, NetworkInfo info)
+        {
+            _availableGames.Add(info);
+        }
+
+        private void HandleScanReplyEnd(LdnHeader obj)
+        {
+            _scan.Set();
+        }
+
+        private void DisconnectInternal()
+        {
+            if (_networkConnected)
+            {
+                _networkConnected = false;
+
+                _hostedProxy?.Dispose();
+                _hostedProxy = null;
+
+                _connectedProxy?.Dispose();
+                _connectedProxy = null;
+
+                _apConnected.Reset();
+
+                NetworkChange?.Invoke(this, new NetworkChangeEventArgs(new NetworkInfo(), false, _disconnectReason));
+
+                if (IsConnected)
+                {
+                    _timeout.RefreshTimeout();
+                }
+            }
+        }
+
+        public void DisconnectNetwork()
+        {
+            if (_networkConnected)
+            {
+                SendAsync(_protocol.Encode(PacketId.Disconnect, new DisconnectMessage()));
+
+                DisconnectInternal();
+            }
+        }
+
+        public ResultCode Reject(DisconnectReason disconnectReason, uint nodeId)
+        {
+            if (_networkConnected)
+            {
+                _reject.Reset();
+
+                SendAsync(_protocol.Encode(PacketId.Reject, new RejectRequest(disconnectReason, nodeId)));
+
+                int index = WaitHandle.WaitAny(new WaitHandle[] { _reject, _error }, InactiveTimeout);
+
+                if (index == 0)
+                {
+                    return (ConsumeNetworkError() != NetworkError.None) ? ResultCode.InvalidState : ResultCode.Success;
+                }
+            }
+
+            return ResultCode.InvalidState;
+        }
+
+        public void SetAdvertiseData(byte[] data)
+        {
+            // TODO: validate we're the owner (the server will do this anyways tho)
+            if (_networkConnected)
+            {
+                SendAsync(_protocol.Encode(PacketId.SetAdvertiseData, data));
+            }
+        }
+
+        public void SetGameVersion(byte[] versionString)
+        {
+            _gameVersion = versionString;
+
+            if (_gameVersion.Length < 0x10)
+            {
+                Array.Resize(ref _gameVersion, 0x10);
+            }
+        }
+
+        public void SetStationAcceptPolicy(AcceptPolicy acceptPolicy)
+        {
+            // TODO: validate we're the owner (the server will do this anyways tho)
+            if (_networkConnected)
+            {
+                SendAsync(_protocol.Encode(PacketId.SetAcceptPolicy, new SetAcceptPolicyRequest
+                {
+                    StationAcceptPolicy = acceptPolicy
+                }));
+            }
+        }
+
+        private void DisposeProxy()
+        {
+            _hostedProxy?.Dispose();
+            _hostedProxy = null;
+        }
+
+        private void ConfigureAccessPoint(ref RyuNetworkConfig request)
+        {
+            _gameVersion.AsSpan().CopyTo(request.GameVersion.AsSpan());
+
+            if (_useP2pProxy)
+            {
+                // Before sending the request, attempt to set up a proxy server.
+                // This can be on a range of private ports, which can be exposed on a range of public
+                // ports via UPnP. If any of this fails, we just fall back to using the master server.
+
+                int i = 0;
+                for (; i < P2pProxyServer.PrivatePortRange; i++)
+                {
+                    _hostedProxy = new P2pProxyServer(this, (ushort)(P2pProxyServer.PrivatePortBase + i), _protocol);
+
+                    try
+                    {
+                        _hostedProxy.Start();
+
+                        break;
+                    }
+                    catch (SocketException e)
+                    {
+                        _hostedProxy.Dispose();
+                        _hostedProxy = null;
+
+                        if (e.SocketErrorCode != SocketError.AddressAlreadyInUse)
+                        {
+                            i = P2pProxyServer.PrivatePortRange; // Immediately fail.
+                        }
+                    }
+                }
+
+                bool openSuccess = i < P2pProxyServer.PrivatePortRange;
+
+                if (openSuccess)
+                {
+                    Task<ushort> natPunchResult = _hostedProxy.NatPunch();
+
+                    try
+                    {
+                        if (natPunchResult.Result != 0)
+                        {
+                            // Tell the server that we are hosting the proxy.
+                            request.ExternalProxyPort = natPunchResult.Result;
+                        }
+                    }
+                    catch (Exception) { }
+
+                    if (request.ExternalProxyPort == 0)
+                    {
+                        Logger.Warning?.Print(LogClass.ServiceLdn, "Failed to open a port with UPnP for P2P connection. Proxying through the master server instead. Expect higher latency.");
+                        _hostedProxy.Dispose();
+                    }
+                    else
+                    {
+                        Logger.Info?.Print(LogClass.ServiceLdn, $"Created a wireless P2P network on port {request.ExternalProxyPort}.");
+                        _hostedProxy.Start();
+
+                        (_, UnicastIPAddressInformation unicastAddress) = NetworkHelpers.GetLocalInterface();
+
+                        unicastAddress.Address.GetAddressBytes().AsSpan().CopyTo(request.PrivateIp.AsSpan());
+                        request.InternalProxyPort = _hostedProxy.PrivatePort;
+                        request.AddressFamily = unicastAddress.Address.AddressFamily;
+                    }
+                }
+                else
+                {
+                    Logger.Warning?.Print(LogClass.ServiceLdn, "Cannot create a P2P server. Proxying through the master server instead. Expect higher latency.");
+                }
+            }
+        }
+
+        private bool CreateNetworkCommon()
+        {
+            bool signalled = _apConnected.WaitOne(FailureTimeout);
+
+            if (!_useP2pProxy && _hostedProxy != null)
+            {
+                Logger.Warning?.Print(LogClass.ServiceLdn, "Locally hosted proxy server was not externally reachable. Proxying through the master server instead. Expect higher latency.");
+
+                DisposeProxy();
+            }
+
+            if (signalled && _connectedProxy != null)
+            {
+                _connectedProxy.EnsureProxyReady();
+
+                Config = _connectedProxy.ProxyConfig;
+            }
+            else
+            {
+                DisposeProxy();
+            }
+
+            return signalled;
+        }
+
+        public bool CreateNetwork(CreateAccessPointRequest request, byte[] advertiseData)
+        {
+            _timeout.DisableTimeout();
+
+            ConfigureAccessPoint(ref request.RyuNetworkConfig);
+
+            if (!EnsureConnected())
+            {
+                DisposeProxy();
+
+                return false;
+            }
+
+            UpdatePassphraseIfNeeded();
+
+            SendAsync(_protocol.Encode(PacketId.CreateAccessPoint, request, advertiseData));
+
+            // Send a network change event with dummy data immediately. Necessary to avoid crashes in some games
+            var networkChangeEvent = new NetworkChangeEventArgs(new NetworkInfo()
+            {
+                Common = new CommonNetworkInfo()
+                {
+                    MacAddress = InitializeMemory.MacAddress,
+                    Channel = request.NetworkConfig.Channel,
+                    LinkLevel = 3,
+                    NetworkType = 2,
+                    Ssid = new Ssid()
+                    {
+                        Length = 32
+                    }
+                },
+                Ldn = new LdnNetworkInfo()
+                {
+                    AdvertiseDataSize = (ushort)advertiseData.Length,
+                    AuthenticationId = 0,
+                    NodeCount = 1,
+                    NodeCountMax = request.NetworkConfig.NodeCountMax,
+                    SecurityMode = (ushort)request.SecurityConfig.SecurityMode
+                }
+            }, true);
+            networkChangeEvent.Info.Ldn.Nodes[0] = new NodeInfo()
+            {
+                Ipv4Address = 175243265,
+                IsConnected = 1,
+                LocalCommunicationVersion = request.NetworkConfig.LocalCommunicationVersion,
+                MacAddress = InitializeMemory.MacAddress,
+                NodeId = 0,
+                UserName = request.UserConfig.UserName
+            };
+            "12345678123456781234567812345678"u8.ToArray().CopyTo(networkChangeEvent.Info.Common.Ssid.Name.AsSpan());
+            NetworkChange?.Invoke(this, networkChangeEvent);
+
+            return CreateNetworkCommon();
+        }
+
+        public bool CreateNetworkPrivate(CreateAccessPointPrivateRequest request, byte[] advertiseData)
+        {
+            _timeout.DisableTimeout();
+
+            ConfigureAccessPoint(ref request.RyuNetworkConfig);
+
+            if (!EnsureConnected())
+            {
+                DisposeProxy();
+
+                return false;
+            }
+
+            UpdatePassphraseIfNeeded();
+
+            SendAsync(_protocol.Encode(PacketId.CreateAccessPointPrivate, request, advertiseData));
+
+            return CreateNetworkCommon();
+        }
+
+        public NetworkInfo[] Scan(ushort channel, ScanFilter scanFilter)
+        {
+            if (!_networkConnected)
+            {
+                _timeout.RefreshTimeout();
+            }
+
+            _availableGames.Clear();
+
+            int index = -1;
+
+            if (EnsureConnected())
+            {
+                UpdatePassphraseIfNeeded();
+
+                _scan.Reset();
+
+                SendAsync(_protocol.Encode(PacketId.Scan, scanFilter));
+
+                index = WaitHandle.WaitAny(new WaitHandle[] { _scan, _error }, ScanTimeout);
+            }
+
+            if (index != 0)
+            {
+                // An error occurred or timeout. Write 0 games.
+                return Array.Empty<NetworkInfo>();
+            }
+
+            return _availableGames.ToArray();
+        }
+
+        private NetworkError ConnectCommon()
+        {
+            bool signalled = _apConnected.WaitOne(FailureTimeout);
+
+            NetworkError error = ConsumeNetworkError();
+
+            if (error != NetworkError.None)
+            {
+                return error;
+            }
+
+            if (signalled && _connectedProxy != null)
+            {
+                _connectedProxy.EnsureProxyReady();
+
+                Config = _connectedProxy.ProxyConfig;
+            }
+
+            return signalled ? NetworkError.None : NetworkError.ConnectTimeout;
+        }
+
+        public NetworkError Connect(ConnectRequest request)
+        {
+            _timeout.DisableTimeout();
+
+            if (!EnsureConnected())
+            {
+                return NetworkError.Unknown;
+            }
+
+            SendAsync(_protocol.Encode(PacketId.Connect, request));
+
+            var networkChangeEvent = new NetworkChangeEventArgs(new NetworkInfo()
+            {
+                Common = request.NetworkInfo.Common,
+                Ldn = request.NetworkInfo.Ldn
+            }, true);
+
+            NetworkChange?.Invoke(this, networkChangeEvent);
+
+            return ConnectCommon();
+        }
+
+        public NetworkError ConnectPrivate(ConnectPrivateRequest request)
+        {
+            _timeout.DisableTimeout();
+
+            if (!EnsureConnected())
+            {
+                return NetworkError.Unknown;
+            }
+
+            SendAsync(_protocol.Encode(PacketId.ConnectPrivate, request));
+
+            return ConnectCommon();
+        }
+
+        private void HandleProxyConfig(LdnHeader header, ProxyConfig config)
+        {
+            Config = config;
+
+            SocketHelpers.RegisterProxy(new LdnProxy(config, this, _protocol));
+        }
+    }
+}

src/Ryujinx.HLE/HOS/Services/Ldn/UserServiceCreator/LdnRyu/NetworkTimeout.cs

@@ -0,0 +1,83 @@
+using System;
+using System.Threading;
+using System.Threading.Tasks;
+
+namespace Ryujinx.HLE.HOS.Services.Ldn.UserServiceCreator.LdnRyu
+{
+    class NetworkTimeout : IDisposable
+    {
+        private readonly int _idleTimeout;
+        private readonly Action _timeoutCallback;
+        private CancellationTokenSource _cancel;
+
+        private readonly object _lock = new object();
+
+        public NetworkTimeout(int idleTimeout, Action timeoutCallback)
+        {
+            _idleTimeout = idleTimeout;
+            _timeoutCallback = timeoutCallback;
+        }
+
+        private async Task TimeoutTask()
+        {
+            CancellationTokenSource cts;
+
+            lock (_lock)
+            {
+                cts = _cancel;
+            }
+
+            if (cts == null)
+            {
+                return;
+            }
+
+            try
+            {
+                await Task.Delay(_idleTimeout, cts.Token);
+            }
+            catch (TaskCanceledException)
+            {
+                return; // Timeout cancelled.
+            }
+
+            lock (_lock)
+            {
+                // Run the timeout callback. If the cancel token source has been replaced, we have _just_ been cancelled.
+                if (cts == _cancel)
+                {
+                    _timeoutCallback();
+                }
+            }
+        }
+
+        public bool RefreshTimeout()
+        {
+            lock (_lock)
+            {
+                _cancel?.Cancel();
+
+                _cancel = new CancellationTokenSource();
+
+                Task.Run(TimeoutTask);
+            }
+
+            return true;
+        }
+
+        public void DisableTimeout()
+        {
+            lock (_lock)
+            {
+                _cancel?.Cancel();
+
+                _cancel = new CancellationTokenSource();
+            }
+        }
+
+        public void Dispose()
+        {
+            DisableTimeout();
+        }
+    }
+}

src/Ryujinx.HLE/HOS/Services/Ldn/UserServiceCreator/LdnRyu/Proxy/EphemeralPortPool.cs

@@ -0,0 +1,53 @@
+using System.Collections.Generic;
+
+namespace Ryujinx.HLE.HOS.Services.Ldn.UserServiceCreator.LdnRyu.Proxy
+{
+    public class EphemeralPortPool
+    {
+        private const ushort EphemeralBase = 49152;
+
+        private readonly List<ushort> _ephemeralPorts = new List<ushort>();
+
+        private readonly object _lock = new object();
+
+        public ushort Get()
+        {
+            ushort port = EphemeralBase;
+            lock (_lock)
+            {
+                // Starting at the ephemeral port base, return an ephemeral port that is not in use.
+                // Returns 0 if the range is exhausted.
+
+                for (int i = 0; i < _ephemeralPorts.Count; i++)
+                {
+                    ushort existingPort = _ephemeralPorts[i];
+
+                    if (existingPort > port)
+                    {
+                        // The port was free - take it.
+                        _ephemeralPorts.Insert(i, port);
+
+                        return port;
+                    }
+
+                    port++;
+                }
+
+                if (port != 0)
+                {
+                    _ephemeralPorts.Add(port);
+                }
+
+                return port;
+            }
+        }
+
+        public void Return(ushort port)
+        {
+            lock (_lock)
+            {
+                _ephemeralPorts.Remove(port);
+            }
+        }
+    }
+}

src/Ryujinx.HLE/HOS/Services/Ldn/UserServiceCreator/LdnRyu/Proxy/LdnProxy.cs

@@ -0,0 +1,254 @@
+using Ryujinx.Common.Logging;
+using Ryujinx.HLE.HOS.Services.Ldn.UserServiceCreator.LdnRyu.Types;
+using Ryujinx.HLE.HOS.Services.Ldn.UserServiceCreator.Types;
+using System;
+using System.Collections.Generic;
+using System.Net;
+using System.Net.Sockets;
+
+namespace Ryujinx.HLE.HOS.Services.Ldn.UserServiceCreator.LdnRyu.Proxy
+{
+    class LdnProxy : IDisposable
+    {
+        public EndPoint LocalEndpoint { get; }
+        public IPAddress LocalAddress { get; }
+
+        private readonly List<LdnProxySocket> _sockets = new List<LdnProxySocket>();
+        private readonly Dictionary<ProtocolType, EphemeralPortPool> _ephemeralPorts = new Dictionary<ProtocolType, EphemeralPortPool>();
+
+        private readonly IProxyClient _parent;
+        private RyuLdnProtocol _protocol;
+        private readonly uint _subnetMask;
+        private readonly uint _localIp;
+        private readonly uint _broadcast;
+
+        public LdnProxy(ProxyConfig config, IProxyClient client, RyuLdnProtocol protocol)
+        {
+            _parent = client;
+            _protocol = protocol;
+
+            _ephemeralPorts[ProtocolType.Udp] = new EphemeralPortPool();
+            _ephemeralPorts[ProtocolType.Tcp] = new EphemeralPortPool();
+
+            byte[] address = BitConverter.GetBytes(config.ProxyIp);
+            Array.Reverse(address);
+            LocalAddress = new IPAddress(address);
+
+            _subnetMask = config.ProxySubnetMask;
+            _localIp = config.ProxyIp;
+            _broadcast = _localIp | (~_subnetMask);
+
+            RegisterHandlers(protocol);
+        }
+
+        public bool Supported(AddressFamily domain, SocketType type, ProtocolType protocol)
+        {
+            if (protocol == ProtocolType.Tcp)
+            {
+                Logger.Error?.PrintMsg(LogClass.ServiceLdn, "Tcp proxy networking is untested. Please report this game so that it can be tested.");
+            }
+            return domain == AddressFamily.InterNetwork && (protocol == ProtocolType.Tcp || protocol == ProtocolType.Udp);
+        }
+
+        private void RegisterHandlers(RyuLdnProtocol protocol)
+        {
+            protocol.ProxyConnect += HandleConnectionRequest;
+            protocol.ProxyConnectReply += HandleConnectionResponse;
+            protocol.ProxyData += HandleData;
+            protocol.ProxyDisconnect += HandleDisconnect;
+
+            _protocol = protocol;
+        }
+
+        public void UnregisterHandlers(RyuLdnProtocol protocol)
+        {
+            protocol.ProxyConnect -= HandleConnectionRequest;
+            protocol.ProxyConnectReply -= HandleConnectionResponse;
+            protocol.ProxyData -= HandleData;
+            protocol.ProxyDisconnect -= HandleDisconnect;
+        }
+
+        public ushort GetEphemeralPort(ProtocolType type)
+        {
+            return _ephemeralPorts[type].Get();
+        }
+
+        public void ReturnEphemeralPort(ProtocolType type, ushort port)
+        {
+            _ephemeralPorts[type].Return(port);
+        }
+
+        public void RegisterSocket(LdnProxySocket socket)
+        {
+            lock (_sockets)
+            {
+                _sockets.Add(socket);
+            }
+        }
+
+        public void UnregisterSocket(LdnProxySocket socket)
+        {
+            lock (_sockets)
+            {
+                _sockets.Remove(socket);
+            }
+        }
+
+        private void ForRoutedSockets(ProxyInfo info, Action<LdnProxySocket> action)
+        {
+            lock (_sockets)
+            {
+                foreach (LdnProxySocket socket in _sockets)
+                {
+                    // Must match protocol and destination port.
+                    if (socket.ProtocolType != info.Protocol || socket.LocalEndPoint is not IPEndPoint endpoint || endpoint.Port != info.DestPort)
+                    {
+                        continue;
+                    }
+
+                    // We can assume packets routed to us have been sent to our destination.
+                    // They will either be sent to us, or broadcast packets.
+
+                    action(socket);
+                }
+            }
+        }
+
+        public void HandleConnectionRequest(LdnHeader header, ProxyConnectRequest request)
+        {
+            ForRoutedSockets(request.Info, (socket) =>
+            {
+                socket.HandleConnectRequest(request);
+            });
+        }
+
+        public void HandleConnectionResponse(LdnHeader header, ProxyConnectResponse response)
+        {
+            ForRoutedSockets(response.Info, (socket) =>
+            {
+                socket.HandleConnectResponse(response);
+            });
+        }
+
+        public void HandleData(LdnHeader header, ProxyDataHeader proxyHeader, byte[] data)
+        {
+            ProxyDataPacket packet = new ProxyDataPacket() { Header = proxyHeader, Data = data };
+
+            ForRoutedSockets(proxyHeader.Info, (socket) =>
+            {
+                socket.IncomingData(packet);
+            });
+        }
+
+        public void HandleDisconnect(LdnHeader header, ProxyDisconnectMessage disconnect)
+        {
+            ForRoutedSockets(disconnect.Info, (socket) =>
+            {
+                socket.HandleDisconnect(disconnect);
+            });
+        }
+
+        private uint GetIpV4(IPEndPoint endpoint)
+        {
+            if (endpoint.AddressFamily != AddressFamily.InterNetwork)
+            {
+                throw new NotSupportedException();
+            }
+
+            byte[] address = endpoint.Address.GetAddressBytes();
+            Array.Reverse(address);
+
+            return BitConverter.ToUInt32(address);
+        }
+
+        private ProxyInfo MakeInfo(IPEndPoint localEp, IPEndPoint remoteEP, ProtocolType type)
+        {
+            return new ProxyInfo
+            {
+                SourceIpV4 = GetIpV4(localEp),
+                SourcePort = (ushort)localEp.Port,
+
+                DestIpV4 = GetIpV4(remoteEP),
+                DestPort = (ushort)remoteEP.Port,
+
+                Protocol = type
+            };
+        }
+
+        public void RequestConnection(IPEndPoint localEp, IPEndPoint remoteEp, ProtocolType type)
+        {
+            // We must ask the other side to initialize a connection, so they can accept a socket for us.
+
+            ProxyConnectRequest request = new ProxyConnectRequest
+            {
+                Info = MakeInfo(localEp, remoteEp, type)
+            };
+
+            _parent.SendAsync(_protocol.Encode(PacketId.ProxyConnect, request));
+        }
+
+        public void SignalConnected(IPEndPoint localEp, IPEndPoint remoteEp, ProtocolType type)
+        {
+            // We must tell the other side that we have accepted their request for connection.
+
+            ProxyConnectResponse request = new ProxyConnectResponse
+            {
+                Info = MakeInfo(localEp, remoteEp, type)
+            };
+
+            _parent.SendAsync(_protocol.Encode(PacketId.ProxyConnectReply, request));
+        }
+
+        public void EndConnection(IPEndPoint localEp, IPEndPoint remoteEp, ProtocolType type)
+        {
+            // We must tell the other side that our connection is dropped.
+
+            ProxyDisconnectMessage request = new ProxyDisconnectMessage
+            {
+                Info = MakeInfo(localEp, remoteEp, type),
+                DisconnectReason = 0 // TODO
+            };
+
+            _parent.SendAsync(_protocol.Encode(PacketId.ProxyDisconnect, request));
+        }
+
+        public int SendTo(ReadOnlySpan<byte> buffer, SocketFlags flags, IPEndPoint localEp, IPEndPoint remoteEp, ProtocolType type)
+        {
+            // We send exactly as much as the user wants us to, currently instantly.
+            // TODO: handle over "virtual mtu" (we have a max packet size to worry about anyways). fragment if tcp? throw if udp?
+
+            ProxyDataHeader request = new ProxyDataHeader
+            {
+                Info = MakeInfo(localEp, remoteEp, type),
+                DataLength = (uint)buffer.Length
+            };
+
+            _parent.SendAsync(_protocol.Encode(PacketId.ProxyData, request, buffer.ToArray()));
+
+            return buffer.Length;
+        }
+
+        public bool IsBroadcast(uint ip)
+        {
+            return ip == _broadcast;
+        }
+
+        public bool IsMyself(uint ip)
+        {
+            return ip == _localIp;
+        }
+
+        public void Dispose()
+        {
+            UnregisterHandlers(_protocol);
+
+            lock (_sockets)
+            {
+                foreach (LdnProxySocket socket in _sockets)
+                {
+                    socket.ProxyDestroyed();
+                }
+            }
+        }
+    }
+}

src/Ryujinx.HLE/HOS/Services/Ldn/UserServiceCreator/LdnRyu/Proxy/LdnProxySocket.cs

@@ -0,0 +1,797 @@
+using Ryujinx.HLE.HOS.Services.Ldn.UserServiceCreator.LdnRyu.Types;
+using Ryujinx.HLE.HOS.Services.Sockets.Bsd.Impl;
+using Ryujinx.HLE.HOS.Services.Sockets.Bsd.Proxy;
+using System;
+using System.Collections.Generic;
+using System.Net;
+using System.Net.Sockets;
+using System.Threading;
+
+namespace Ryujinx.HLE.HOS.Services.Ldn.UserServiceCreator.LdnRyu.Proxy
+{
+    /// <summary>
+    /// This socket is forwarded through a TCP stream that goes through the Ldn server.
+    /// The Ldn server will then route the packets we send (or need to receive) within the virtual adhoc network.
+    /// </summary>
+    class LdnProxySocket : ISocketImpl
+    {
+        private readonly LdnProxy _proxy;
+
+        private bool _isListening;
+        private readonly List<LdnProxySocket> _listenSockets = new List<LdnProxySocket>();
+
+        private readonly Queue<ProxyConnectRequest> _connectRequests = new Queue<ProxyConnectRequest>();
+
+        private readonly AutoResetEvent _acceptEvent = new AutoResetEvent(false);
+        private readonly int _acceptTimeout = -1;
+
+        private readonly Queue<int> _errors = new Queue<int>();
+
+        private readonly AutoResetEvent _connectEvent = new AutoResetEvent(false);
+        private ProxyConnectResponse _connectResponse;
+
+        private int _receiveTimeout = -1;
+        private readonly AutoResetEvent _receiveEvent = new AutoResetEvent(false);
+        private readonly Queue<ProxyDataPacket> _receiveQueue = new Queue<ProxyDataPacket>();
+
+        // private int _sendTimeout = -1; // Sends are techically instant right now, so not _really_ used.
+
+        private bool _connecting;
+        private bool _broadcast;
+        private bool _readShutdown;
+        // private bool _writeShutdown;
+        private bool _closed;
+
+        private readonly Dictionary<SocketOptionName, int> _socketOptions = new Dictionary<SocketOptionName, int>()
+        {
+            { SocketOptionName.Broadcast,       0 }, //TODO: honor this value
+            { SocketOptionName.DontLinger,      0 },
+            { SocketOptionName.Debug,           0 },
+            { SocketOptionName.Error,           0 },
+            { SocketOptionName.KeepAlive,       0 },
+            { SocketOptionName.OutOfBandInline, 0 },
+            { SocketOptionName.ReceiveBuffer,   131072 },
+            { SocketOptionName.ReceiveTimeout,  -1 },
+            { SocketOptionName.SendBuffer,      131072 },
+            { SocketOptionName.SendTimeout,     -1 },
+            { SocketOptionName.Type,            0 },
+            { SocketOptionName.ReuseAddress,    0 } //TODO: honor this value
+        };
+
+        public EndPoint RemoteEndPoint { get; private set; }
+
+        public EndPoint LocalEndPoint { get; private set; }
+
+        public bool Connected { get; private set; }
+
+        public bool IsBound { get; private set; }
+
+        public AddressFamily AddressFamily { get; }
+
+        public SocketType SocketType { get; }
+
+        public ProtocolType ProtocolType { get; }
+
+        public bool Blocking { get; set; }
+
+        public int Available
+        {
+            get
+            {
+                int result = 0;
+
+                lock (_receiveQueue)
+                {
+                    foreach (ProxyDataPacket data in _receiveQueue)
+                    {
+                        result += data.Data.Length;
+                    }
+                }
+
+                return result;
+            }
+        }
+
+        public bool Readable
+        {
+            get
+            {
+                if (_isListening)
+                {
+                    lock (_connectRequests)
+                    {
+                        return _connectRequests.Count > 0;
+                    }
+                }
+                else
+                {
+                    if (_readShutdown)
+                    {
+                        return true;
+                    }
+
+                    lock (_receiveQueue)
+                    {
+                        return _receiveQueue.Count > 0;
+                    }
+                }
+
+            }
+        }
+        public bool Writable => Connected || ProtocolType == ProtocolType.Udp;
+        public bool Error => false;
+
+        public LdnProxySocket(AddressFamily addressFamily, SocketType socketType, ProtocolType protocolType, LdnProxy proxy)
+        {
+            AddressFamily = addressFamily;
+            SocketType = socketType;
+            ProtocolType = protocolType;
+
+            _proxy = proxy;
+            _socketOptions[SocketOptionName.Type] = (int)socketType;
+
+            proxy.RegisterSocket(this);
+        }
+
+        private IPEndPoint EnsureLocalEndpoint(bool replace)
+        {
+            if (LocalEndPoint != null)
+            {
+                if (replace)
+                {
+                    _proxy.ReturnEphemeralPort(ProtocolType, (ushort)((IPEndPoint)LocalEndPoint).Port);
+                }
+                else
+                {
+                    return (IPEndPoint)LocalEndPoint;
+                }
+            }
+
+            IPEndPoint localEp = new IPEndPoint(_proxy.LocalAddress, _proxy.GetEphemeralPort(ProtocolType));
+            LocalEndPoint = localEp;
+
+            return localEp;
+        }
+
+        public LdnProxySocket AsAccepted(IPEndPoint remoteEp)
+        {
+            Connected = true;
+            RemoteEndPoint = remoteEp;
+
+            IPEndPoint localEp = EnsureLocalEndpoint(true);
+
+            _proxy.SignalConnected(localEp, remoteEp, ProtocolType);
+
+            return this;
+        }
+
+        private void SignalError(WsaError error)
+        {
+            lock (_errors)
+            {
+                _errors.Enqueue((int)error);
+            }
+        }
+
+        private IPEndPoint GetEndpoint(uint ipv4, ushort port)
+        {
+            byte[] address = BitConverter.GetBytes(ipv4);
+            Array.Reverse(address);
+
+            return new IPEndPoint(new IPAddress(address), port);
+        }
+
+        public void IncomingData(ProxyDataPacket packet)
+        {
+            bool isBroadcast = _proxy.IsBroadcast(packet.Header.Info.DestIpV4);
+
+            if (!_closed && (_broadcast || !isBroadcast))
+            {
+                lock (_receiveQueue)
+                {
+                    _receiveQueue.Enqueue(packet);
+                }
+            }
+        }
+
+        public ISocketImpl Accept()
+        {
+            if (!_isListening)
+            {
+                throw new InvalidOperationException();
+            }
+
+            // Accept a pending request to this socket.
+
+            lock (_connectRequests)
+            {
+                if (!Blocking && _connectRequests.Count == 0)
+                {
+                    throw new SocketException((int)WsaError.WSAEWOULDBLOCK);
+                }
+            }
+
+            while (true)
+            {
+                _acceptEvent.WaitOne(_acceptTimeout);
+
+                lock (_connectRequests)
+                {
+                    while (_connectRequests.Count > 0)
+                    {
+                        ProxyConnectRequest request = _connectRequests.Dequeue();
+
+                        if (_connectRequests.Count > 0)
+                        {
+                            _acceptEvent.Set(); // Still more accepts to do.
+                        }
+
+                        // Is this request made for us?
+                        IPEndPoint endpoint = GetEndpoint(request.Info.DestIpV4, request.Info.DestPort);
+
+                        if (Equals(endpoint, LocalEndPoint))
+                        {
+                            // Yes - let's accept.
+                            IPEndPoint remoteEndpoint = GetEndpoint(request.Info.SourceIpV4, request.Info.SourcePort);
+
+                            LdnProxySocket socket = new LdnProxySocket(AddressFamily, SocketType, ProtocolType, _proxy).AsAccepted(remoteEndpoint);
+
+                            lock (_listenSockets)
+                            {
+                                _listenSockets.Add(socket);
+                            }
+
+                            return socket;
+                        }
+                    }
+                }
+            }
+        }
+
+        public void Bind(EndPoint localEP)
+        {
+            ArgumentNullException.ThrowIfNull(localEP);
+
+            if (LocalEndPoint != null)
+            {
+                _proxy.ReturnEphemeralPort(ProtocolType, (ushort)((IPEndPoint)LocalEndPoint).Port);
+            }
+            var asIPEndpoint = (IPEndPoint)localEP;
+            if (asIPEndpoint.Port == 0)
+            {
+                asIPEndpoint.Port = (ushort)_proxy.GetEphemeralPort(ProtocolType);
+            }
+
+            LocalEndPoint = (IPEndPoint)localEP;
+
+            IsBound = true;
+        }
+
+        public void Close()
+        {
+            _closed = true;
+
+            _proxy.UnregisterSocket(this);
+
+            if (Connected)
+            {
+                Disconnect(false);
+            }
+
+            lock (_listenSockets)
+            {
+                foreach (LdnProxySocket socket in _listenSockets)
+                {
+                    socket.Close();
+                }
+            }
+
+            _isListening = false;
+        }
+
+        public void Connect(EndPoint remoteEP)
+        {
+            if (_isListening || !IsBound)
+            {
+                throw new InvalidOperationException();
+            }
+
+            if (remoteEP is not IPEndPoint)
+            {
+                throw new NotSupportedException();
+            }
+
+            IPEndPoint localEp = EnsureLocalEndpoint(true);
+
+            _connecting = true;
+
+            _proxy.RequestConnection(localEp, (IPEndPoint)remoteEP, ProtocolType);
+
+            if (!Blocking && ProtocolType == ProtocolType.Tcp)
+            {
+                throw new SocketException((int)WsaError.WSAEWOULDBLOCK);
+            }
+
+            _connectEvent.WaitOne(); //timeout?
+
+            if (_connectResponse.Info.SourceIpV4 == 0)
+            {
+                throw new SocketException((int)WsaError.WSAECONNREFUSED);
+            }
+
+            _connectResponse = default;
+        }
+
+        public void HandleConnectResponse(ProxyConnectResponse obj)
+        {
+            if (!_connecting)
+            {
+                return;
+            }
+
+            _connecting = false;
+
+            if (_connectResponse.Info.SourceIpV4 != 0)
+            {
+                IPEndPoint remoteEp = GetEndpoint(obj.Info.SourceIpV4, obj.Info.SourcePort);
+                RemoteEndPoint = remoteEp;
+
+                Connected = true;
+            }
+            else
+            {
+                // Connection failed
+
+                SignalError(WsaError.WSAECONNREFUSED);
+            }
+        }
+
+        public void Disconnect(bool reuseSocket)
+        {
+            if (Connected)
+            {
+                ConnectionEnded();
+
+                // The other side needs to be notified that connection ended.
+                _proxy.EndConnection(LocalEndPoint as IPEndPoint, RemoteEndPoint as IPEndPoint, ProtocolType);
+            }
+        }
+
+        private void ConnectionEnded()
+        {
+            if (Connected)
+            {
+                RemoteEndPoint = null;
+                Connected = false;
+            }
+        }
+
+        public void GetSocketOption(SocketOptionLevel optionLevel, SocketOptionName optionName, byte[] optionValue)
+        {
+            if (optionLevel != SocketOptionLevel.Socket)
+            {
+                throw new NotImplementedException();
+            }
+
+            if (_socketOptions.TryGetValue(optionName, out int result))
+            {
+                byte[] data = BitConverter.GetBytes(result);
+                Array.Copy(data, 0, optionValue, 0, Math.Min(data.Length, optionValue.Length));
+            }
+            else
+            {
+                throw new NotImplementedException();
+            }
+        }
+
+        public void Listen(int backlog)
+        {
+            if (!IsBound)
+            {
+                throw new SocketException();
+            }
+
+            _isListening = true;
+        }
+
+        public void HandleConnectRequest(ProxyConnectRequest obj)
+        {
+            lock (_connectRequests)
+            {
+                _connectRequests.Enqueue(obj);
+            }
+
+            _connectEvent.Set();
+        }
+
+        public void HandleDisconnect(ProxyDisconnectMessage message)
+        {
+            Disconnect(false);
+        }
+
+        public int Receive(Span<byte> buffer)
+        {
+            EndPoint dummy = new IPEndPoint(IPAddress.Any, 0);
+
+            return ReceiveFrom(buffer, SocketFlags.None, ref dummy);
+        }
+
+        public int Receive(Span<byte> buffer, SocketFlags flags)
+        {
+            EndPoint dummy = new IPEndPoint(IPAddress.Any, 0);
+
+            return ReceiveFrom(buffer, flags, ref dummy);
+        }
+
+        public int Receive(Span<byte> buffer, SocketFlags flags, out SocketError socketError)
+        {
+            EndPoint dummy = new IPEndPoint(IPAddress.Any, 0);
+
+            return ReceiveFrom(buffer, flags, out socketError, ref dummy);
+        }
+
+        public int ReceiveFrom(Span<byte> buffer, SocketFlags flags, ref EndPoint remoteEp)
+        {
+            // We just receive all packets meant for us anyways regardless of EP in the actual implementation.
+            // The point is mostly to return the endpoint that we got the data from.
+
+            if (!Connected && ProtocolType == ProtocolType.Tcp)
+            {
+                throw new SocketException((int)WsaError.WSAECONNRESET);
+            }
+
+            lock (_receiveQueue)
+            {
+                if (_receiveQueue.Count > 0)
+                {
+                    return ReceiveFromQueue(buffer, flags, ref remoteEp);
+                }
+                else if (_readShutdown)
+                {
+                    return 0;
+                }
+                else if (!Blocking)
+                {
+                    throw new SocketException((int)WsaError.WSAEWOULDBLOCK);
+                }
+            }
+
+            int timeout = _receiveTimeout;
+
+            _receiveEvent.WaitOne(timeout == 0 ? -1 : timeout);
+
+            if (!Connected && ProtocolType == ProtocolType.Tcp)
+            {
+                throw new SocketException((int)WsaError.WSAECONNRESET);
+            }
+
+            lock (_receiveQueue)
+            {
+                if (_receiveQueue.Count > 0)
+                {
+                    return ReceiveFromQueue(buffer, flags, ref remoteEp);
+                }
+                else if (_readShutdown)
+                {
+                    return 0;
+                }
+                else
+                {
+                    throw new SocketException((int)WsaError.WSAETIMEDOUT);
+                }
+            }
+        }
+
+        public int ReceiveFrom(Span<byte> buffer, SocketFlags flags, out SocketError socketError, ref EndPoint remoteEp)
+        {
+            // We just receive all packets meant for us anyways regardless of EP in the actual implementation.
+            // The point is mostly to return the endpoint that we got the data from.
+
+            if (!Connected && ProtocolType == ProtocolType.Tcp)
+            {
+                socketError = SocketError.ConnectionReset;
+                return -1;
+            }
+
+            lock (_receiveQueue)
+            {
+                if (_receiveQueue.Count > 0)
+                {
+                    return ReceiveFromQueue(buffer, flags, out socketError, ref remoteEp);
+                }
+                else if (_readShutdown)
+                {
+                    socketError = SocketError.Success;
+                    return 0;
+                }
+                else if (!Blocking)
+                {
+                    throw new SocketException((int)WsaError.WSAEWOULDBLOCK);
+                }
+            }
+
+            int timeout = _receiveTimeout;
+
+            _receiveEvent.WaitOne(timeout == 0 ? -1 : timeout);
+
+            if (!Connected && ProtocolType == ProtocolType.Tcp)
+            {
+                throw new SocketException((int)WsaError.WSAECONNRESET);
+            }
+
+            lock (_receiveQueue)
+            {
+                if (_receiveQueue.Count > 0)
+                {
+                    return ReceiveFromQueue(buffer, flags, out socketError, ref remoteEp);
+                }
+                else if (_readShutdown)
+                {
+                    socketError = SocketError.Success;
+                    return 0;
+                }
+                else
+                {
+                    socketError = SocketError.TimedOut;
+                    return -1;
+                }
+            }
+        }
+
+        private int ReceiveFromQueue(Span<byte> buffer, SocketFlags flags, ref EndPoint remoteEp)
+        {
+            int size = buffer.Length;
+
+            // Assumes we have the receive queue lock, and at least one item in the queue.
+            ProxyDataPacket packet = _receiveQueue.Peek();
+
+            remoteEp = GetEndpoint(packet.Header.Info.SourceIpV4, packet.Header.Info.SourcePort);
+
+            bool peek = (flags & SocketFlags.Peek) != 0;
+
+            int read;
+
+            if (packet.Data.Length > size)
+            {
+                read = size;
+
+                // Cannot fit in the output buffer. Copy up to what we've got.
+                packet.Data.AsSpan(0, size).CopyTo(buffer);
+
+                if (ProtocolType == ProtocolType.Udp)
+                {
+                    // Udp overflows, loses the data, then throws an exception.
+
+                    if (!peek)
+                    {
+                        _receiveQueue.Dequeue();
+                    }
+
+                    throw new SocketException((int)WsaError.WSAEMSGSIZE);
+                }
+                else if (ProtocolType == ProtocolType.Tcp)
+                {
+                    // Split the data at the buffer boundary. It will stay on the recieve queue.
+
+                    byte[] newData = new byte[packet.Data.Length - size];
+                    Array.Copy(packet.Data, size, newData, 0, newData.Length);
+
+                    packet.Data = newData;
+                }
+            }
+            else
+            {
+                read = packet.Data.Length;
+
+                packet.Data.AsSpan(0, packet.Data.Length).CopyTo(buffer);
+
+                if (!peek)
+                {
+                    _receiveQueue.Dequeue();
+                }
+            }
+
+            return read;
+        }
+
+        private int ReceiveFromQueue(Span<byte> buffer, SocketFlags flags, out SocketError socketError, ref EndPoint remoteEp)
+        {
+            int size = buffer.Length;
+
+            // Assumes we have the receive queue lock, and at least one item in the queue.
+            ProxyDataPacket packet = _receiveQueue.Peek();
+
+            remoteEp = GetEndpoint(packet.Header.Info.SourceIpV4, packet.Header.Info.SourcePort);
+
+            bool peek = (flags & SocketFlags.Peek) != 0;
+
+            int read;
+
+            if (packet.Data.Length > size)
+            {
+                read = size;
+
+                // Cannot fit in the output buffer. Copy up to what we've got.
+                packet.Data.AsSpan(0, size).CopyTo(buffer);
+
+                if (ProtocolType == ProtocolType.Udp)
+                {
+                    // Udp overflows, loses the data, then throws an exception.
+
+                    if (!peek)
+                    {
+                        _receiveQueue.Dequeue();
+                    }
+
+                    socketError = SocketError.MessageSize;
+                    return -1;
+                }
+                else if (ProtocolType == ProtocolType.Tcp)
+                {
+                    // Split the data at the buffer boundary. It will stay on the recieve queue.
+
+                    byte[] newData = new byte[packet.Data.Length - size];
+                    Array.Copy(packet.Data, size, newData, 0, newData.Length);
+
+                    packet.Data = newData;
+                }
+            }
+            else
+            {
+                read = packet.Data.Length;
+
+                packet.Data.AsSpan(0, packet.Data.Length).CopyTo(buffer);
+
+                if (!peek)
+                {
+                    _receiveQueue.Dequeue();
+                }
+            }
+
+            socketError = SocketError.Success;
+
+            return read;
+        }
+
+        public int Send(ReadOnlySpan<byte> buffer)
+        {
+            // Send to the remote host chosen when we "connect" or "accept".
+            if (!Connected)
+            {
+                throw new SocketException();
+            }
+
+            return SendTo(buffer, SocketFlags.None, RemoteEndPoint);
+        }
+
+        public int Send(ReadOnlySpan<byte> buffer, SocketFlags flags)
+        {
+            // Send to the remote host chosen when we "connect" or "accept".
+            if (!Connected)
+            {
+                throw new SocketException();
+            }
+
+            return SendTo(buffer, flags, RemoteEndPoint);
+        }
+
+        public int Send(ReadOnlySpan<byte> buffer, SocketFlags flags, out SocketError socketError)
+        {
+            // Send to the remote host chosen when we "connect" or "accept".
+            if (!Connected)
+            {
+                throw new SocketException();
+            }
+
+            return SendTo(buffer, flags, out socketError, RemoteEndPoint);
+        }
+
+        public int SendTo(ReadOnlySpan<byte> buffer, SocketFlags flags, EndPoint remoteEP)
+        {
+            if (!Connected && ProtocolType == ProtocolType.Tcp)
+            {
+                throw new SocketException((int)WsaError.WSAECONNRESET);
+            }
+
+            IPEndPoint localEp = EnsureLocalEndpoint(false);
+
+            if (remoteEP is not IPEndPoint)
+            {
+                throw new NotSupportedException();
+            }
+
+            return _proxy.SendTo(buffer, flags, localEp, (IPEndPoint)remoteEP, ProtocolType);
+        }
+
+        public int SendTo(ReadOnlySpan<byte> buffer, SocketFlags flags, out SocketError socketError, EndPoint remoteEP)
+        {
+            if (!Connected && ProtocolType == ProtocolType.Tcp)
+            {
+                socketError = SocketError.ConnectionReset;
+                return -1;
+            }
+
+            IPEndPoint localEp = EnsureLocalEndpoint(false);
+
+            if (remoteEP is not IPEndPoint)
+            {
+                // throw new NotSupportedException();
+                socketError = SocketError.OperationNotSupported;
+                return -1;
+            }
+
+            socketError = SocketError.Success;
+
+            return _proxy.SendTo(buffer, flags, localEp, (IPEndPoint)remoteEP, ProtocolType);
+        }
+
+        public bool Poll(int microSeconds, SelectMode mode)
+        {
+            return mode switch
+            {
+                SelectMode.SelectRead => Readable,
+                SelectMode.SelectWrite => Writable,
+                SelectMode.SelectError => Error,
+                _ => false
+            };
+        }
+
+        public void SetSocketOption(SocketOptionLevel optionLevel, SocketOptionName optionName, int optionValue)
+        {
+            if (optionLevel != SocketOptionLevel.Socket)
+            {
+                throw new NotImplementedException();
+            }
+
+            switch (optionName)
+            {
+                case SocketOptionName.SendTimeout:
+                    //_sendTimeout = optionValue;
+                    break;
+                case SocketOptionName.ReceiveTimeout:
+                    _receiveTimeout = optionValue;
+                    break;
+                case SocketOptionName.Broadcast:
+                    _broadcast = optionValue != 0;
+                    break;
+            }
+
+            lock (_socketOptions)
+            {
+                _socketOptions[optionName] = optionValue;
+            }
+        }
+
+        public void SetSocketOption(SocketOptionLevel optionLevel, SocketOptionName optionName, object optionValue)
+        {
+            // Just linger uses this for now in BSD, which we ignore.
+        }
+
+        public void Shutdown(SocketShutdown how)
+        {
+            switch (how)
+            {
+                case SocketShutdown.Both:
+                    _readShutdown = true;
+                    // _writeShutdown = true;
+                    break;
+                case SocketShutdown.Receive:
+                    _readShutdown = true;
+                    break;
+                case SocketShutdown.Send:
+                    // _writeShutdown = true;
+                    break;
+            }
+        }
+
+        public void ProxyDestroyed()
+        {
+            // Do nothing, for now. Will likely be more useful with TCP.
+        }
+
+        public void Dispose()
+        {
+
+        }
+    }
+}

src/Ryujinx.HLE/HOS/Services/Ldn/UserServiceCreator/LdnRyu/Proxy/P2pProxyClient.cs

@@ -0,0 +1,93 @@
+using Ryujinx.Common.Logging;
+using Ryujinx.HLE.HOS.Services.Ldn.UserServiceCreator.LdnRyu.Types;
+using Ryujinx.HLE.HOS.Services.Ldn.UserServiceCreator.Types;
+using Ryujinx.HLE.HOS.Services.Sockets.Bsd.Proxy;
+using System.Net.Sockets;
+using System.Threading;
+using TcpClient = NetCoreServer.TcpClient;
+
+namespace Ryujinx.HLE.HOS.Services.Ldn.UserServiceCreator.LdnRyu.Proxy
+{
+    class P2pProxyClient : TcpClient, IProxyClient
+    {
+        private const int FailureTimeout = 4000;
+
+        public ProxyConfig ProxyConfig { get; private set; }
+
+        private readonly RyuLdnProtocol _protocol;
+
+        private readonly ManualResetEvent _connected = new ManualResetEvent(false);
+        private readonly ManualResetEvent _ready = new ManualResetEvent(false);
+        private readonly AutoResetEvent _error = new AutoResetEvent(false);
+
+        public P2pProxyClient(string address, int port) : base(address, port)
+        {
+            if (ProxyHelpers.SupportsNoDelay())
+            {
+                OptionNoDelay = true;
+            }
+
+            _protocol = new RyuLdnProtocol();
+
+            _protocol.ProxyConfig += HandleProxyConfig;
+
+            ConnectAsync();
+        }
+
+        protected override void OnConnected()
+        {
+            Logger.Info?.PrintMsg(LogClass.ServiceLdn, $"Proxy TCP client connected a new session with Id {Id}");
+
+            _connected.Set();
+        }
+
+        protected override void OnDisconnected()
+        {
+            Logger.Info?.PrintMsg(LogClass.ServiceLdn, $"Proxy TCP client disconnected a session with Id {Id}");
+
+            SocketHelpers.UnregisterProxy();
+
+            _connected.Reset();
+        }
+
+        protected override void OnReceived(byte[] buffer, long offset, long size)
+        {
+            _protocol.Read(buffer, (int)offset, (int)size);
+        }
+
+        protected override void OnError(SocketError error)
+        {
+            Logger.Info?.PrintMsg(LogClass.ServiceLdn, $"Proxy TCP client caught an error with code {error}");
+
+            _error.Set();
+        }
+
+        private void HandleProxyConfig(LdnHeader header, ProxyConfig config)
+        {
+            ProxyConfig = config;
+
+            SocketHelpers.RegisterProxy(new LdnProxy(config, this, _protocol));
+
+            _ready.Set();
+        }
+
+        public bool EnsureProxyReady()
+        {
+            return _ready.WaitOne(FailureTimeout);
+        }
+
+        public bool PerformAuth(ExternalProxyConfig config)
+        {
+            bool signalled = _connected.WaitOne(FailureTimeout);
+
+            if (!signalled)
+            {
+                return false;
+            }
+
+            SendAsync(_protocol.Encode(PacketId.ExternalProxy, config));
+
+            return true;
+        }
+    }
+}

src/Ryujinx.HLE/HOS/Services/Ldn/UserServiceCreator/LdnRyu/Proxy/P2pProxyServer.cs

@@ -0,0 +1,388 @@
+using NetCoreServer;
+using Open.Nat;
+using Ryujinx.Common.Logging;
+using Ryujinx.HLE.HOS.Services.Ldn.UserServiceCreator.LdnRyu.Types;
+using Ryujinx.HLE.HOS.Services.Ldn.UserServiceCreator.Types;
+using System;
+using System.Collections.Generic;
+using System.Diagnostics;
+using System.Linq;
+using System.Net;
+using System.Net.Sockets;
+using System.Threading;
+using System.Threading.Tasks;
+
+namespace Ryujinx.HLE.HOS.Services.Ldn.UserServiceCreator.LdnRyu.Proxy
+{
+    class P2pProxyServer : TcpServer, IDisposable
+    {
+        public const ushort PrivatePortBase = 39990;
+        public const int PrivatePortRange = 10;
+
+        private const ushort PublicPortBase = 39990;
+        private const int PublicPortRange = 10;
+
+        private const ushort PortLeaseLength = 60;
+        private const ushort PortLeaseRenew = 50;
+
+        private const ushort AuthWaitSeconds = 1;
+
+        private readonly ReaderWriterLockSlim _lock = new ReaderWriterLockSlim(LockRecursionPolicy.SupportsRecursion);
+
+        public ushort PrivatePort { get; }
+
+        private ushort _publicPort;
+
+        private bool _disposed;
+        private readonly CancellationTokenSource _disposedCancellation = new CancellationTokenSource();
+
+        private NatDevice _natDevice;
+        private Mapping _portMapping;
+
+        private readonly List<P2pProxySession> _players = new List<P2pProxySession>();
+
+        private readonly List<ExternalProxyToken> _waitingTokens = new List<ExternalProxyToken>();
+        private readonly AutoResetEvent _tokenEvent = new AutoResetEvent(false);
+
+        private uint _broadcastAddress;
+
+        private readonly LdnMasterProxyClient _master;
+        private readonly RyuLdnProtocol _masterProtocol;
+        private readonly RyuLdnProtocol _protocol;
+
+        public P2pProxyServer(LdnMasterProxyClient master, ushort port, RyuLdnProtocol masterProtocol) : base(IPAddress.Any, port)
+        {
+            if (ProxyHelpers.SupportsNoDelay())
+            {
+                OptionNoDelay = true;
+            }
+
+            PrivatePort = port;
+
+            _master = master;
+            _masterProtocol = masterProtocol;
+
+            _masterProtocol.ExternalProxyState += HandleStateChange;
+            _masterProtocol.ExternalProxyToken += HandleToken;
+
+            _protocol = new RyuLdnProtocol();
+        }
+
+        private void HandleToken(LdnHeader header, ExternalProxyToken token)
+        {
+            _lock.EnterWriteLock();
+
+            _waitingTokens.Add(token);
+
+            _lock.ExitWriteLock();
+
+            _tokenEvent.Set();
+        }
+
+        private void HandleStateChange(LdnHeader header, ExternalProxyConnectionState state)
+        {
+            if (!state.Connected)
+            {
+                _lock.EnterWriteLock();
+
+                _waitingTokens.RemoveAll(token => token.VirtualIp == state.IpAddress);
+
+                _players.RemoveAll(player =>
+                {
+                    if (player.VirtualIpAddress == state.IpAddress)
+                    {
+                        player.DisconnectAndStop();
+
+                        return true;
+                    }
+
+                    return false;
+                });
+
+                _lock.ExitWriteLock();
+            }
+        }
+
+        public void Configure(ProxyConfig config)
+        {
+            _broadcastAddress = config.ProxyIp | (~config.ProxySubnetMask);
+        }
+
+        public async Task<ushort> NatPunch()
+        {
+            NatDiscoverer discoverer = new NatDiscoverer();
+            CancellationTokenSource cts = new CancellationTokenSource(1000);
+
+            NatDevice device;
+
+            try
+            {
+                device = await discoverer.DiscoverDeviceAsync(PortMapper.Upnp, cts);
+            }
+            catch (NatDeviceNotFoundException)
+            {
+                return 0;
+            }
+
+            _publicPort = PublicPortBase;
+
+            for (int i = 0; i < PublicPortRange; i++)
+            {
+                try
+                {
+                    _portMapping = new Mapping(Protocol.Tcp, PrivatePort, _publicPort, PortLeaseLength, "Ryujinx Local Multiplayer");
+
+                    await device.CreatePortMapAsync(_portMapping);
+
+                    break;
+                }
+                catch (MappingException)
+                {
+                    _publicPort++;
+                }
+                catch (Exception)
+                {
+                    return 0;
+                }
+
+                if (i == PublicPortRange - 1)
+                {
+                    _publicPort = 0;
+                }
+            }
+
+            if (_publicPort != 0)
+            {
+                _ = Task.Delay(PortLeaseRenew * 1000, _disposedCancellation.Token).ContinueWith((task) => Task.Run(RefreshLease));
+            }
+
+            _natDevice = device;
+
+            return _publicPort;
+        }
+
+        // Proxy handlers
+
+        private void RouteMessage(P2pProxySession sender, ref ProxyInfo info, Action<P2pProxySession> action)
+        {
+            if (info.SourceIpV4 == 0)
+            {
+                // If they sent from a connection bound on 0.0.0.0, make others see it as them.
+                info.SourceIpV4 = sender.VirtualIpAddress;
+            }
+            else if (info.SourceIpV4 != sender.VirtualIpAddress)
+            {
+                // Can't pretend to be somebody else.
+                return;
+            }
+
+            uint destIp = info.DestIpV4;
+
+            if (destIp == 0xc0a800ff)
+            {
+                destIp = _broadcastAddress;
+            }
+
+            bool isBroadcast = destIp == _broadcastAddress;
+
+            _lock.EnterReadLock();
+
+            if (isBroadcast)
+            {
+                _players.ForEach(player =>
+                {
+                    action(player);
+                });
+            }
+            else
+            {
+                P2pProxySession target = _players.FirstOrDefault(player => player.VirtualIpAddress == destIp);
+
+                if (target != null)
+                {
+                    action(target);
+                }
+            }
+
+            _lock.ExitReadLock();
+        }
+
+        public void HandleProxyDisconnect(P2pProxySession sender, LdnHeader header, ProxyDisconnectMessage message)
+        {
+            RouteMessage(sender, ref message.Info, (target) =>
+            {
+                target.SendAsync(sender.Protocol.Encode(PacketId.ProxyDisconnect, message));
+            });
+        }
+
+        public void HandleProxyData(P2pProxySession sender, LdnHeader header, ProxyDataHeader message, byte[] data)
+        {
+            RouteMessage(sender, ref message.Info, (target) =>
+            {
+                target.SendAsync(sender.Protocol.Encode(PacketId.ProxyData, message, data));
+            });
+        }
+
+        public void HandleProxyConnectReply(P2pProxySession sender, LdnHeader header, ProxyConnectResponse message)
+        {
+            RouteMessage(sender, ref message.Info, (target) =>
+            {
+                target.SendAsync(sender.Protocol.Encode(PacketId.ProxyConnectReply, message));
+            });
+        }
+
+        public void HandleProxyConnect(P2pProxySession sender, LdnHeader header, ProxyConnectRequest message)
+        {
+            RouteMessage(sender, ref message.Info, (target) =>
+            {
+                target.SendAsync(sender.Protocol.Encode(PacketId.ProxyConnect, message));
+            });
+        }
+
+        // End proxy handlers
+
+        private async Task RefreshLease()
+        {
+            if (_disposed || _natDevice == null)
+            {
+                return;
+            }
+
+            try
+            {
+                await _natDevice.CreatePortMapAsync(_portMapping);
+            }
+            catch (Exception)
+            {
+
+            }
+
+            _ = Task.Delay(PortLeaseRenew, _disposedCancellation.Token).ContinueWith((task) => Task.Run(RefreshLease));
+        }
+
+        public bool TryRegisterUser(P2pProxySession session, ExternalProxyConfig config)
+        {
+            _lock.EnterWriteLock();
+
+            // Attempt to find matching configuration. If we don't find one, wait for a bit and try again.
+            // Woken by new tokens coming in from the master server.
+
+            IPAddress address = (session.Socket.RemoteEndPoint as IPEndPoint).Address;
+            byte[] addressBytes = ProxyHelpers.AddressTo16Byte(address);
+
+            long time;
+            long endTime = Stopwatch.GetTimestamp() + Stopwatch.Frequency * AuthWaitSeconds;
+
+            do
+            {
+                for (int i = 0; i < _waitingTokens.Count; i++)
+                {
+                    ExternalProxyToken waitToken = _waitingTokens[i];
+
+                    // Allow any client that has a private IP to connect. (indicated by the server as all 0 in the token)
+
+                    bool isPrivate = waitToken.PhysicalIp.AsSpan().SequenceEqual(new byte[16]);
+                    bool ipEqual = isPrivate || waitToken.AddressFamily == address.AddressFamily && waitToken.PhysicalIp.AsSpan().SequenceEqual(addressBytes);
+
+                    if (ipEqual && waitToken.Token.AsSpan().SequenceEqual(config.Token.AsSpan()))
+                    {
+                        // This is a match.
+
+                        _waitingTokens.RemoveAt(i);
+
+                        session.SetIpv4(waitToken.VirtualIp);
+
+                        ProxyConfig pconfig = new ProxyConfig
+                        {
+                            ProxyIp = session.VirtualIpAddress,
+                            ProxySubnetMask = 0xFFFF0000 // TODO: Use from server.
+                        };
+
+                        if (_players.Count == 0)
+                        {
+                            Configure(pconfig);
+                        }
+
+                        _players.Add(session);
+
+                        session.SendAsync(_protocol.Encode(PacketId.ProxyConfig, pconfig));
+
+                        _lock.ExitWriteLock();
+
+                        return true;
+                    }
+                }
+
+                // Couldn't find the token.
+                // It may not have arrived yet, so wait for one to arrive.
+
+                _lock.ExitWriteLock();
+
+                time = Stopwatch.GetTimestamp();
+                int remainingMs = (int)((endTime - time) / (Stopwatch.Frequency / 1000));
+
+                if (remainingMs < 0)
+                {
+                    remainingMs = 0;
+                }
+
+                _tokenEvent.WaitOne(remainingMs);
+
+                _lock.EnterWriteLock();
+
+            } while (time < endTime);
+
+            _lock.ExitWriteLock();
+
+            return false;
+        }
+
+        public void DisconnectProxyClient(P2pProxySession session)
+        {
+            _lock.EnterWriteLock();
+
+            bool removed = _players.Remove(session);
+
+            if (removed)
+            {
+                _master.SendAsync(_masterProtocol.Encode(PacketId.ExternalProxyState, new ExternalProxyConnectionState
+                {
+                    IpAddress = session.VirtualIpAddress,
+                    Connected = false
+                }));
+            }
+
+            _lock.ExitWriteLock();
+        }
+
+        public new void Dispose()
+        {
+            base.Dispose();
+
+            _disposed = true;
+            _disposedCancellation.Cancel();
+
+            try
+            {
+                Task delete = _natDevice?.DeletePortMapAsync(new Mapping(Protocol.Tcp, PrivatePort, _publicPort, 60, "Ryujinx Local Multiplayer"));
+
+                // Just absorb any exceptions.
+                delete?.ContinueWith((task) => { });
+            }
+            catch (Exception)
+            {
+                // Fail silently.
+            }
+        }
+
+        protected override TcpSession CreateSession()
+        {
+            return new P2pProxySession(this);
+        }
+
+        protected override void OnError(SocketError error)
+        {
+            Logger.Info?.PrintMsg(LogClass.ServiceLdn, $"Proxy TCP server caught an error with code {error}");
+        }
+    }
+}

src/Ryujinx.HLE/HOS/Services/Ldn/UserServiceCreator/LdnRyu/Proxy/P2pProxySession.cs

@@ -0,0 +1,90 @@
+using NetCoreServer;
+using Ryujinx.HLE.HOS.Services.Ldn.UserServiceCreator.LdnRyu.Types;
+using System;
+
+namespace Ryujinx.HLE.HOS.Services.Ldn.UserServiceCreator.LdnRyu.Proxy
+{
+    class P2pProxySession : TcpSession
+    {
+        public uint VirtualIpAddress { get; private set; }
+        public RyuLdnProtocol Protocol { get; }
+
+        private readonly P2pProxyServer _parent;
+
+        private bool _masterClosed;
+
+        public P2pProxySession(P2pProxyServer server) : base(server)
+        {
+            _parent = server;
+
+            Protocol = new RyuLdnProtocol();
+
+            Protocol.ProxyDisconnect += HandleProxyDisconnect;
+            Protocol.ProxyData += HandleProxyData;
+            Protocol.ProxyConnectReply += HandleProxyConnectReply;
+            Protocol.ProxyConnect += HandleProxyConnect;
+
+            Protocol.ExternalProxy += HandleAuthentication;
+        }
+
+        private void HandleAuthentication(LdnHeader header, ExternalProxyConfig token)
+        {
+            if (!_parent.TryRegisterUser(this, token))
+            {
+                Disconnect();
+            }
+        }
+
+        public void SetIpv4(uint ip)
+        {
+            VirtualIpAddress = ip;
+        }
+
+        public void DisconnectAndStop()
+        {
+            _masterClosed = true;
+
+            Disconnect();
+        }
+
+        protected override void OnDisconnected()
+        {
+            if (!_masterClosed)
+            {
+                _parent.DisconnectProxyClient(this);
+            }
+        }
+
+        protected override void OnReceived(byte[] buffer, long offset, long size)
+        {
+            try
+            {
+                Protocol.Read(buffer, (int)offset, (int)size);
+            }
+            catch (Exception)
+            {
+                Disconnect();
+            }
+        }
+
+        private void HandleProxyDisconnect(LdnHeader header, ProxyDisconnectMessage message)
+        {
+            _parent.HandleProxyDisconnect(this, header, message);
+        }
+
+        private void HandleProxyData(LdnHeader header, ProxyDataHeader message, byte[] data)
+        {
+            _parent.HandleProxyData(this, header, message, data);
+        }
+
+        private void HandleProxyConnectReply(LdnHeader header, ProxyConnectResponse data)
+        {
+            _parent.HandleProxyConnectReply(this, header, data);
+        }
+
+        private void HandleProxyConnect(LdnHeader header, ProxyConnectRequest message)
+        {
+            _parent.HandleProxyConnect(this, header, message);
+        }
+    }
+}

src/Ryujinx.HLE/HOS/Services/Ldn/UserServiceCreator/LdnRyu/Proxy/ProxyHelpers.cs

@@ -0,0 +1,24 @@
+using System;
+using System.Net;
+using System.Runtime.InteropServices;
+
+namespace Ryujinx.HLE.HOS.Services.Ldn.UserServiceCreator.LdnRyu.Proxy
+{
+    static class ProxyHelpers
+    {
+        public static byte[] AddressTo16Byte(IPAddress address)
+        {
+            byte[] ipBytes = new byte[16];
+            byte[] srcBytes = address.GetAddressBytes();
+
+            Array.Copy(srcBytes, 0, ipBytes, 0, srcBytes.Length);
+
+            return ipBytes;
+        }
+
+        public static bool SupportsNoDelay()
+        {
+            return RuntimeInformation.IsOSPlatform(OSPlatform.Windows);
+        }
+    }
+}

src/Ryujinx.HLE/HOS/Services/Ldn/UserServiceCreator/LdnRyu/RyuLdnProtocol.cs

@@ -0,0 +1,380 @@
+using Ryujinx.Common.Utilities;
+using Ryujinx.HLE.HOS.Services.Ldn.Types;
+using Ryujinx.HLE.HOS.Services.Ldn.UserServiceCreator.LdnRyu.Types;
+using Ryujinx.HLE.HOS.Services.Ldn.UserServiceCreator.Types;
+using System;
+using System.Runtime.InteropServices;
+
+namespace Ryujinx.HLE.HOS.Services.Ldn.UserServiceCreator.LdnRyu
+{
+    class RyuLdnProtocol
+    {
+        private const byte CurrentProtocolVersion = 1;
+        private const int Magic = ('R' << 0) | ('L' << 8) | ('D' << 16) | ('N' << 24);
+        private const int MaxPacketSize = 131072;
+
+        private readonly int _headerSize = Marshal.SizeOf<LdnHeader>();
+
+        private readonly byte[] _buffer = new byte[MaxPacketSize];
+        private int _bufferEnd = 0;
+
+        // Client Packets.
+        public event Action<LdnHeader, InitializeMessage> Initialize;
+        public event Action<LdnHeader, PassphraseMessage> Passphrase;
+        public event Action<LdnHeader, NetworkInfo> Connected;
+        public event Action<LdnHeader, NetworkInfo> SyncNetwork;
+        public event Action<LdnHeader, NetworkInfo> ScanReply;
+        public event Action<LdnHeader> ScanReplyEnd;
+        public event Action<LdnHeader, DisconnectMessage> Disconnected;
+
+        // External Proxy Packets.
+        public event Action<LdnHeader, ExternalProxyConfig> ExternalProxy;
+        public event Action<LdnHeader, ExternalProxyConnectionState> ExternalProxyState;
+        public event Action<LdnHeader, ExternalProxyToken> ExternalProxyToken;
+
+        // Server Packets.
+        public event Action<LdnHeader, CreateAccessPointRequest, byte[]> CreateAccessPoint;
+        public event Action<LdnHeader, CreateAccessPointPrivateRequest, byte[]> CreateAccessPointPrivate;
+        public event Action<LdnHeader, RejectRequest> Reject;
+        public event Action<LdnHeader> RejectReply;
+        public event Action<LdnHeader, SetAcceptPolicyRequest> SetAcceptPolicy;
+        public event Action<LdnHeader, byte[]> SetAdvertiseData;
+        public event Action<LdnHeader, ConnectRequest> Connect;
+        public event Action<LdnHeader, ConnectPrivateRequest> ConnectPrivate;
+        public event Action<LdnHeader, ScanFilter> Scan;
+
+        // Proxy Packets.
+        public event Action<LdnHeader, ProxyConfig> ProxyConfig;
+        public event Action<LdnHeader, ProxyConnectRequest> ProxyConnect;
+        public event Action<LdnHeader, ProxyConnectResponse> ProxyConnectReply;
+        public event Action<LdnHeader, ProxyDataHeader, byte[]> ProxyData;
+        public event Action<LdnHeader, ProxyDisconnectMessage> ProxyDisconnect;
+
+        // Lifecycle Packets.
+        public event Action<LdnHeader, NetworkErrorMessage> NetworkError;
+        public event Action<LdnHeader, PingMessage> Ping;
+
+        public RyuLdnProtocol() { }
+
+        public void Reset()
+        {
+            _bufferEnd = 0;
+        }
+
+        public void Read(byte[] data, int offset, int size)
+        {
+            int index = 0;
+
+            while (index < size)
+            {
+                if (_bufferEnd < _headerSize)
+                {
+                    // Assemble the header first.
+
+                    int copyable = Math.Min(size - index, Math.Min(size, _headerSize - _bufferEnd));
+
+                    Array.Copy(data, index + offset, _buffer, _bufferEnd, copyable);
+
+                    index += copyable;
+                    _bufferEnd += copyable;
+                }
+
+                if (_bufferEnd >= _headerSize)
+                {
+                    // The header is available. Make sure we received all the data (size specified in the header)
+
+                    LdnHeader ldnHeader = MemoryMarshal.Cast<byte, LdnHeader>(_buffer)[0];
+
+                    if (ldnHeader.Magic != Magic)
+                    {
+                        throw new InvalidOperationException("Invalid magic number in received packet.");
+                    }
+
+                    if (ldnHeader.Version != CurrentProtocolVersion)
+                    {
+                        throw new InvalidOperationException($"Protocol version mismatch. Expected ${CurrentProtocolVersion}, was ${ldnHeader.Version}.");
+                    }
+
+                    int finalSize = _headerSize + ldnHeader.DataSize;
+
+                    if (finalSize >= MaxPacketSize)
+                    {
+                        throw new InvalidOperationException($"Max packet size {MaxPacketSize} exceeded.");
+                    }
+
+                    int copyable = Math.Min(size - index, Math.Min(size, finalSize - _bufferEnd));
+
+                    Array.Copy(data, index + offset, _buffer, _bufferEnd, copyable);
+
+                    index += copyable;
+                    _bufferEnd += copyable;
+
+                    if (finalSize == _bufferEnd)
+                    {
+                        // The full packet has been retrieved. Send it to be decoded.
+
+                        byte[] ldnData = new byte[ldnHeader.DataSize];
+
+                        Array.Copy(_buffer, _headerSize, ldnData, 0, ldnData.Length);
+
+                        DecodeAndHandle(ldnHeader, ldnData);
+
+                        Reset();
+                    }
+                }
+            }
+        }
+
+        private (T, byte[]) ParseWithData<T>(byte[] data) where T : struct
+        {
+            T str = default;
+            int size = Marshal.SizeOf(str);
+
+            byte[] remainder = new byte[data.Length - size];
+
+            if (remainder.Length > 0)
+            {
+                Array.Copy(data, size, remainder, 0, remainder.Length);
+            }
+
+            return (MemoryMarshal.Read<T>(data), remainder);
+        }
+
+        private void DecodeAndHandle(LdnHeader header, byte[] data)
+        {
+            switch ((PacketId)header.Type)
+            {
+                // Client Packets.
+                case PacketId.Initialize:
+                    {
+                        Initialize?.Invoke(header, MemoryMarshal.Read<InitializeMessage>(data));
+
+                        break;
+                    }
+                case PacketId.Passphrase:
+                    {
+                        Passphrase?.Invoke(header, MemoryMarshal.Read<PassphraseMessage>(data));
+
+                        break;
+                    }
+                case PacketId.Connected:
+                    {
+                        Connected?.Invoke(header, MemoryMarshal.Read<NetworkInfo>(data));
+
+                        break;
+                    }
+                case PacketId.SyncNetwork:
+                    {
+                        SyncNetwork?.Invoke(header, MemoryMarshal.Read<NetworkInfo>(data));
+
+                        break;
+                    }
+                case PacketId.ScanReply:
+                    {
+                        ScanReply?.Invoke(header, MemoryMarshal.Read<NetworkInfo>(data));
+
+                        break;
+                    }
+
+                case PacketId.ScanReplyEnd:
+                    {
+                        ScanReplyEnd?.Invoke(header);
+
+                        break;
+                    }
+                case PacketId.Disconnect:
+                    {
+                        Disconnected?.Invoke(header, MemoryMarshal.Read<DisconnectMessage>(data));
+
+                        break;
+                    }
+
+                // External Proxy Packets.
+                case PacketId.ExternalProxy:
+                    {
+                        ExternalProxy?.Invoke(header, MemoryMarshal.Read<ExternalProxyConfig>(data));
+
+                        break;
+                    }
+                case PacketId.ExternalProxyState:
+                    {
+                        ExternalProxyState?.Invoke(header, MemoryMarshal.Read<ExternalProxyConnectionState>(data));
+
+                        break;
+                    }
+                case PacketId.ExternalProxyToken:
+                    {
+                        ExternalProxyToken?.Invoke(header, MemoryMarshal.Read<ExternalProxyToken>(data));
+
+                        break;
+                    }
+
+                // Server Packets.
+                case PacketId.CreateAccessPoint:
+                    {
+                        (CreateAccessPointRequest packet, byte[] extraData) = ParseWithData<CreateAccessPointRequest>(data);
+                        CreateAccessPoint?.Invoke(header, packet, extraData);
+                        break;
+                    }
+                case PacketId.CreateAccessPointPrivate:
+                    {
+                        (CreateAccessPointPrivateRequest packet, byte[] extraData) = ParseWithData<CreateAccessPointPrivateRequest>(data);
+                        CreateAccessPointPrivate?.Invoke(header, packet, extraData);
+                        break;
+                    }
+                case PacketId.Reject:
+                    {
+                        Reject?.Invoke(header, MemoryMarshal.Read<RejectRequest>(data));
+
+                        break;
+                    }
+                case PacketId.RejectReply:
+                    {
+                        RejectReply?.Invoke(header);
+
+                        break;
+                    }
+                case PacketId.SetAcceptPolicy:
+                    {
+                        SetAcceptPolicy?.Invoke(header, MemoryMarshal.Read<SetAcceptPolicyRequest>(data));
+
+                        break;
+                    }
+                case PacketId.SetAdvertiseData:
+                    {
+                        SetAdvertiseData?.Invoke(header, data);
+
+                        break;
+                    }
+                case PacketId.Connect:
+                    {
+                        Connect?.Invoke(header, MemoryMarshal.Read<ConnectRequest>(data));
+
+                        break;
+                    }
+                case PacketId.ConnectPrivate:
+                    {
+                        ConnectPrivate?.Invoke(header, MemoryMarshal.Read<ConnectPrivateRequest>(data));
+
+                        break;
+                    }
+                case PacketId.Scan:
+                    {
+                        Scan?.Invoke(header, MemoryMarshal.Read<ScanFilter>(data));
+
+                        break;
+                    }
+
+                // Proxy Packets
+                case PacketId.ProxyConfig:
+                    {
+                        ProxyConfig?.Invoke(header, MemoryMarshal.Read<ProxyConfig>(data));
+
+                        break;
+                    }
+                case PacketId.ProxyConnect:
+                    {
+                        ProxyConnect?.Invoke(header, MemoryMarshal.Read<ProxyConnectRequest>(data));
+
+                        break;
+                    }
+                case PacketId.ProxyConnectReply:
+                    {
+                        ProxyConnectReply?.Invoke(header, MemoryMarshal.Read<ProxyConnectResponse>(data));
+
+                        break;
+                    }
+                case PacketId.ProxyData:
+                    {
+                        (ProxyDataHeader packet, byte[] extraData) = ParseWithData<ProxyDataHeader>(data);
+
+                        ProxyData?.Invoke(header, packet, extraData);
+
+                        break;
+                    }
+                case PacketId.ProxyDisconnect:
+                    {
+                        ProxyDisconnect?.Invoke(header, MemoryMarshal.Read<ProxyDisconnectMessage>(data));
+
+                        break;
+                    }
+
+                // Lifecycle Packets.
+                case PacketId.Ping:
+                    {
+                        Ping?.Invoke(header, MemoryMarshal.Read<PingMessage>(data));
+
+                        break;
+                    }
+                case PacketId.NetworkError:
+                    {
+                        NetworkError?.Invoke(header, MemoryMarshal.Read<NetworkErrorMessage>(data));
+
+                        break;
+                    }
+
+                default:
+                    break;
+            }
+        }
+
+        private static LdnHeader GetHeader(PacketId type, int dataSize)
+        {
+            return new LdnHeader()
+            {
+                Magic = Magic,
+                Version = CurrentProtocolVersion,
+                Type = (byte)type,
+                DataSize = dataSize
+            };
+        }
+
+        public byte[] Encode(PacketId type)
+        {
+            LdnHeader header = GetHeader(type, 0);
+
+            return SpanHelpers.AsSpan<LdnHeader, byte>(ref header).ToArray();
+        }
+
+        public byte[] Encode(PacketId type, byte[] data)
+        {
+            LdnHeader header = GetHeader(type, data.Length);
+
+            byte[] result = SpanHelpers.AsSpan<LdnHeader, byte>(ref header).ToArray();
+
+            Array.Resize(ref result, result.Length + data.Length);
+            Array.Copy(data, 0, result, Marshal.SizeOf<LdnHeader>(), data.Length);
+
+            return result;
+        }
+
+        public byte[] Encode<T>(PacketId type, T packet) where T : unmanaged
+        {
+            byte[] packetData = SpanHelpers.AsSpan<T, byte>(ref packet).ToArray();
+
+            LdnHeader header = GetHeader(type, packetData.Length);
+
+            byte[] result = SpanHelpers.AsSpan<LdnHeader, byte>(ref header).ToArray();
+
+            Array.Resize(ref result, result.Length + packetData.Length);
+            Array.Copy(packetData, 0, result, Marshal.SizeOf<LdnHeader>(), packetData.Length);
+
+            return result;
+        }
+
+        public byte[] Encode<T>(PacketId type, T packet, byte[] data) where T : unmanaged
+        {
+            byte[] packetData = SpanHelpers.AsSpan<T, byte>(ref packet).ToArray();
+
+            LdnHeader header = GetHeader(type, packetData.Length + data.Length);
+
+            byte[] result = SpanHelpers.AsSpan<LdnHeader, byte>(ref header).ToArray();
+
+            Array.Resize(ref result, result.Length + packetData.Length + data.Length);
+            Array.Copy(packetData, 0, result, Marshal.SizeOf<LdnHeader>(), packetData.Length);
+            Array.Copy(data, 0, result, Marshal.SizeOf<LdnHeader>() + packetData.Length, data.Length);
+
+            return result;
+        }
+    }
+}

src/Ryujinx.HLE/HOS/Services/Ldn/UserServiceCreator/LdnRyu/Types/DisconnectMessage.cs

@@ -0,0 +1,10 @@
+using System.Runtime.InteropServices;
+
+namespace Ryujinx.HLE.HOS.Services.Ldn.UserServiceCreator.LdnRyu.Types
+{
+    [StructLayout(LayoutKind.Sequential, Size = 0x4)]
+    struct DisconnectMessage
+    {
+        public uint DisconnectIP;
+    }
+}

src/Ryujinx.HLE/HOS/Services/Ldn/UserServiceCreator/LdnRyu/Types/ExternalProxyConfig.cs

@@ -0,0 +1,19 @@
+using Ryujinx.Common.Memory;
+using System.Net.Sockets;
+using System.Runtime.InteropServices;
+
+namespace Ryujinx.HLE.HOS.Services.Ldn.UserServiceCreator.LdnRyu.Types
+{
+    /// <summary>
+    /// Sent by the server to point a client towards an external server being used as a proxy.
+    /// The client then forwards this to the external proxy after connecting, to verify the connection worked.
+    /// </summary>
+    [StructLayout(LayoutKind.Sequential, Size = 0x26, Pack = 1)]
+    struct ExternalProxyConfig
+    {
+        public Array16<byte> ProxyIp;
+        public AddressFamily AddressFamily;
+        public ushort ProxyPort;
+        public Array16<byte> Token;
+    }
+}

src/Ryujinx.HLE/HOS/Services/Ldn/UserServiceCreator/LdnRyu/Types/ExternalProxyConnectionState.cs

@@ -0,0 +1,18 @@
+using System.Runtime.InteropServices;
+
+namespace Ryujinx.HLE.HOS.Services.Ldn.UserServiceCreator.LdnRyu.Types
+{
+    /// <summary>
+    /// Indicates a change in connection state for the given client.
+    /// Is sent to notify the master server when connection is first established.
+    /// Can be sent by the external proxy to the master server to notify it of a proxy disconnect.
+    /// Can be sent by the master server to notify the external proxy of a user leaving a room.
+    /// Both will result in a force kick.
+    /// </summary>
+    [StructLayout(LayoutKind.Sequential, Size = 0x8, Pack = 4)]
+    struct ExternalProxyConnectionState
+    {
+        public uint IpAddress;
+        public bool Connected;
+    }
+}

src/Ryujinx.HLE/HOS/Services/Ldn/UserServiceCreator/LdnRyu/Types/ExternalProxyToken.cs

@@ -0,0 +1,20 @@
+using Ryujinx.Common.Memory;
+using System.Net.Sockets;
+using System.Runtime.InteropServices;
+
+namespace Ryujinx.HLE.HOS.Services.Ldn.UserServiceCreator.LdnRyu.Types
+{
+    /// <summary>
+    /// Sent by the master server to an external proxy to tell them someone is going to connect.
+    /// This drives authentication, and lets the proxy know what virtual IP to give to each joiner,
+    /// as these are managed by the master server.
+    /// </summary>
+    [StructLayout(LayoutKind.Sequential, Size = 0x28)]
+    struct ExternalProxyToken
+    {
+        public uint VirtualIp;
+        public Array16<byte> Token;
+        public Array16<byte> PhysicalIp;
+        public AddressFamily AddressFamily;
+    }
+}

src/Ryujinx.HLE/HOS/Services/Ldn/UserServiceCreator/LdnRyu/Types/InitializeMessage.cs

@@ -0,0 +1,20 @@
+using Ryujinx.Common.Memory;
+using System.Runtime.InteropServices;
+
+namespace Ryujinx.HLE.HOS.Services.Ldn.UserServiceCreator.LdnRyu.Types
+{
+    /// <summary>
+    /// This message is first sent by the client to identify themselves.
+    /// If the server has a token+mac combo that matches the submission, then they are returned their new ID and mac address. (the mac is also reassigned to the new id)
+    /// Otherwise, they are returned a random mac address.
+    /// </summary>
+    [StructLayout(LayoutKind.Sequential, Size = 0x16)]
+    struct InitializeMessage
+    {
+        // All 0 if we don't have an ID yet.
+        public Array16<byte> Id;
+
+        // All 0 if we don't have a mac yet.
+        public Array6<byte> MacAddress;
+    }
+}

src/Ryujinx.HLE/HOS/Services/Ldn/UserServiceCreator/LdnRyu/Types/LdnHeader.cs

@@ -0,0 +1,13 @@
+using System.Runtime.InteropServices;
+
+namespace Ryujinx.HLE.HOS.Services.Ldn.UserServiceCreator.LdnRyu.Types
+{
+    [StructLayout(LayoutKind.Sequential, Size = 0xA)]
+    struct LdnHeader
+    {
+        public uint Magic;
+        public byte Type;
+        public byte Version;
+        public int DataSize;
+    }
+}

src/Ryujinx.HLE/HOS/Services/Ldn/UserServiceCreator/LdnRyu/Types/PacketId.cs

@@ -0,0 +1,36 @@
+namespace Ryujinx.HLE.HOS.Services.Ldn.UserServiceCreator.LdnRyu.Types
+{
+    enum PacketId
+    {
+        Initialize,
+        Passphrase,
+
+        CreateAccessPoint,
+        CreateAccessPointPrivate,
+        ExternalProxy,
+        ExternalProxyToken,
+        ExternalProxyState,
+        SyncNetwork,
+        Reject,
+        RejectReply,
+        Scan,
+        ScanReply,
+        ScanReplyEnd,
+        Connect,
+        ConnectPrivate,
+        Connected,
+        Disconnect,
+
+        ProxyConfig,
+        ProxyConnect,
+        ProxyConnectReply,
+        ProxyData,
+        ProxyDisconnect,
+
+        SetAcceptPolicy,
+        SetAdvertiseData,
+
+        Ping = 254,
+        NetworkError = 255
+    }
+}

src/Ryujinx.HLE/HOS/Services/Ldn/UserServiceCreator/LdnRyu/Types/PassphraseMessage.cs

@@ -0,0 +1,11 @@
+using Ryujinx.Common.Memory;
+using System.Runtime.InteropServices;
+
+namespace Ryujinx.HLE.HOS.Services.Ldn.UserServiceCreator.LdnRyu.Types
+{
+    [StructLayout(LayoutKind.Sequential, Size = 0x80)]
+    struct PassphraseMessage
+    {
+        public Array128<byte> Passphrase;
+    }
+}

src/Ryujinx.HLE/HOS/Services/Ldn/UserServiceCreator/LdnRyu/Types/PingMessage.cs

@@ -0,0 +1,11 @@
+using System.Runtime.InteropServices;
+
+namespace Ryujinx.HLE.HOS.Services.Ldn.UserServiceCreator.LdnRyu.Types
+{
+    [StructLayout(LayoutKind.Sequential, Size = 0x2)]
+    struct PingMessage
+    {
+        public byte Requester;
+        public byte Id;
+    }
+}

src/Ryujinx.HLE/HOS/Services/Ldn/UserServiceCreator/LdnRyu/Types/ProxyConnectRequest.cs

@@ -0,0 +1,10 @@
+using System.Runtime.InteropServices;
+
+namespace Ryujinx.HLE.HOS.Services.Ldn.UserServiceCreator.LdnRyu.Types
+{
+    [StructLayout(LayoutKind.Sequential, Size = 0x10)]
+    struct ProxyConnectRequest
+    {
+        public ProxyInfo Info;
+    }
+}

src/Ryujinx.HLE/HOS/Services/Ldn/UserServiceCreator/LdnRyu/Types/ProxyConnectResponse.cs

@@ -0,0 +1,10 @@
+using System.Runtime.InteropServices;
+
+namespace Ryujinx.HLE.HOS.Services.Ldn.UserServiceCreator.LdnRyu.Types
+{
+    [StructLayout(LayoutKind.Sequential, Size = 0x10)]
+    struct ProxyConnectResponse
+    {
+        public ProxyInfo Info;
+    }
+}

src/Ryujinx.HLE/HOS/Services/Ldn/UserServiceCreator/LdnRyu/Types/ProxyDataHeader.cs

@@ -0,0 +1,14 @@
+using System.Runtime.InteropServices;
+
+namespace Ryujinx.HLE.HOS.Services.Ldn.UserServiceCreator.LdnRyu.Types
+{
+    /// <summary>
+    /// Represents data sent over a transport layer.
+    /// </summary>
+    [StructLayout(LayoutKind.Sequential, Size = 0x14)]
+    struct ProxyDataHeader
+    {
+        public ProxyInfo Info;
+        public uint DataLength; // Followed by the data with the specified byte length.
+    }
+}

src/Ryujinx.HLE/HOS/Services/Ldn/UserServiceCreator/LdnRyu/Types/ProxyDataPacket.cs

@@ -0,0 +1,8 @@
+namespace Ryujinx.HLE.HOS.Services.Ldn.UserServiceCreator.LdnRyu.Types
+{
+    class ProxyDataPacket
+    {
+        public ProxyDataHeader Header;
+        public byte[] Data;
+    }
+}

src/Ryujinx.HLE/HOS/Services/Ldn/UserServiceCreator/LdnRyu/Types/ProxyDisconnectMessage.cs

@@ -0,0 +1,11 @@
+using System.Runtime.InteropServices;
+
+namespace Ryujinx.HLE.HOS.Services.Ldn.UserServiceCreator.LdnRyu.Types
+{
+    [StructLayout(LayoutKind.Sequential, Size = 0x14)]
+    struct ProxyDisconnectMessage
+    {
+        public ProxyInfo Info;
+        public int DisconnectReason;
+    }
+}

src/Ryujinx.HLE/HOS/Services/Ldn/UserServiceCreator/LdnRyu/Types/ProxyInfo.cs

@@ -0,0 +1,20 @@
+using System.Net.Sockets;
+using System.Runtime.InteropServices;
+
+namespace Ryujinx.HLE.HOS.Services.Ldn.UserServiceCreator.LdnRyu.Types
+{
+    /// <summary>
+    /// Information included in all proxied communication.
+    /// </summary>
+    [StructLayout(LayoutKind.Sequential, Size = 0x10, Pack = 1)]
+    struct ProxyInfo
+    {
+        public uint SourceIpV4;
+        public ushort SourcePort;
+
+        public uint DestIpV4;
+        public ushort DestPort;
+
+        public ProtocolType Protocol;
+    }
+}

src/Ryujinx.HLE/HOS/Services/Ldn/UserServiceCreator/LdnRyu/Types/RejectRequest.cs

@@ -0,0 +1,18 @@
+using Ryujinx.HLE.HOS.Services.Ldn.Types;
+using System.Runtime.InteropServices;
+
+namespace Ryujinx.HLE.HOS.Services.Ldn.UserServiceCreator.LdnRyu.Types
+{
+    [StructLayout(LayoutKind.Sequential, Size = 0x8)]
+    struct RejectRequest
+    {
+        public uint NodeId;
+        public DisconnectReason DisconnectReason;
+
+        public RejectRequest(DisconnectReason disconnectReason, uint nodeId)
+        {
+            DisconnectReason = disconnectReason;
+            NodeId = nodeId;
+        }
+    }
+}

src/Ryujinx.HLE/HOS/Services/Ldn/UserServiceCreator/LdnRyu/Types/RyuNetworkConfig.cs

@@ -0,0 +1,23 @@
+using Ryujinx.Common.Memory;
+using System.Net.Sockets;
+using System.Runtime.InteropServices;
+
+namespace Ryujinx.HLE.HOS.Services.Ldn.UserServiceCreator.LdnRyu.Types
+{
+    [StructLayout(LayoutKind.Sequential, Size = 0x28, Pack = 1)]
+    struct RyuNetworkConfig
+    {
+        public Array16<byte> GameVersion;
+
+        // PrivateIp is included for external proxies for the case where a client attempts to join from
+        // their own LAN. UPnP forwarding can fail when connecting devices on the same network over the public IP,
+        // so if their public IP is identical, the internal address should be sent instead.
+
+        // The fields below are 0 if not hosting a p2p proxy.
+
+        public Array16<byte> PrivateIp;
+        public AddressFamily AddressFamily;
+        public ushort ExternalProxyPort;
+        public ushort InternalProxyPort;
+    }
+}

src/Ryujinx.HLE/HOS/Services/Ldn/UserServiceCreator/LdnRyu/Types/SetAcceptPolicyRequest.cs

@@ -0,0 +1,11 @@
+using Ryujinx.HLE.HOS.Services.Ldn.Types;
+using System.Runtime.InteropServices;
+
+namespace Ryujinx.HLE.HOS.Services.Ldn.UserServiceCreator.LdnRyu.Types
+{
+    [StructLayout(LayoutKind.Sequential, Size = 0x1, Pack = 1)]
+    struct SetAcceptPolicyRequest
+    {
+        public AcceptPolicy StationAcceptPolicy;
+    }
+}

src/Ryujinx.HLE/HOS/Services/Ldn/UserServiceCreator/Station.cs

@@ -14,6 +14,8 @@ namespace Ryujinx.HLE.HOS.Services.Ldn.UserServiceCreator
 
         public bool Connected { get; private set; }
 
+        public ProxyConfig Config => _parent.NetworkClient.Config;
+
         public Station(IUserLocalCommunicationService parent)
         {
             _parent = parent;
@@ -48,9 +50,12 @@ namespace Ryujinx.HLE.HOS.Services.Ldn.UserServiceCreator
 
         public void Dispose()
         {
-            _parent.NetworkClient.DisconnectNetwork();
+            if (_parent.NetworkClient != null)
+            {
+                _parent.NetworkClient.DisconnectNetwork();
 
-            _parent.NetworkClient.NetworkChange -= NetworkChanged;
+                _parent.NetworkClient.NetworkChange -= NetworkChanged;
+            }
         }
 
         private ResultCode NetworkErrorToResult(NetworkError error)

src/Ryujinx.HLE/HOS/Services/Ldn/UserServiceCreator/Types/CreateAccessPointPrivateRequest.cs

@@ -1,4 +1,5 @@
 using Ryujinx.HLE.HOS.Services.Ldn.Types;
+using Ryujinx.HLE.HOS.Services.Ldn.UserServiceCreator.LdnRyu.Types;
 using System.Runtime.InteropServices;
 
 namespace Ryujinx.HLE.HOS.Services.Ldn.UserServiceCreator.Types
@@ -14,5 +15,7 @@ namespace Ryujinx.HLE.HOS.Services.Ldn.UserServiceCreator.Types
         public UserConfig UserConfig;
         public NetworkConfig NetworkConfig;
         public AddressList AddressList;
+
+        public RyuNetworkConfig RyuNetworkConfig;
     }
 }

src/Ryujinx.HLE/HOS/Services/Ldn/UserServiceCreator/Types/CreateAccessPointRequest.cs

@@ -1,4 +1,5 @@
 using Ryujinx.HLE.HOS.Services.Ldn.Types;
+using Ryujinx.HLE.HOS.Services.Ldn.UserServiceCreator.LdnRyu.Types;
 using System.Runtime.InteropServices;
 
 namespace Ryujinx.HLE.HOS.Services.Ldn.UserServiceCreator.Types
@@ -6,11 +7,13 @@ namespace Ryujinx.HLE.HOS.Services.Ldn.UserServiceCreator.Types
     /// <remarks>
     /// Advertise data is appended separately (remaining data in the buffer).
     /// </remarks>
-    [StructLayout(LayoutKind.Sequential, Size = 0x94, CharSet = CharSet.Ansi)]
+    [StructLayout(LayoutKind.Sequential, Size = 0xBC, Pack = 1)]
     struct CreateAccessPointRequest
     {
         public SecurityConfig SecurityConfig;
         public UserConfig UserConfig;
         public NetworkConfig NetworkConfig;
+
+        public RyuNetworkConfig RyuNetworkConfig;
     }
 }

src/Ryujinx.HLE/HOS/Services/Ldn/UserServiceCreator/Types/ProxyConfig.cs

@@ -0,0 +1,11 @@
+using System.Runtime.InteropServices;
+
+namespace Ryujinx.HLE.HOS.Services.Ldn.UserServiceCreator.Types
+{
+    [StructLayout(LayoutKind.Sequential, Size = 0x8)]
+    struct ProxyConfig
+    {
+        public uint ProxyIp;
+        public uint ProxySubnetMask;
+    }
+}

src/Ryujinx.HLE/HOS/Services/Nfc/Nfp/NfpManager/Types/VirtualAmiiboFile.cs

@@ -8,6 +8,7 @@ namespace Ryujinx.HLE.HOS.Services.Nfc.Nfp.NfpManager
         public uint FileVersion { get; set; }
         public byte[] TagUuid { get; set; }
         public string AmiiboId { get; set; }
+        public string NickName { get; set; }
         public DateTime FirstWriteDate { get; set; }
         public DateTime LastWriteDate { get; set; }
         public ushort WriteCounter { get; set; }

src/Ryujinx.HLE/HOS/Services/Nfc/Nfp/VirtualAmiibo.cs

@@ -64,16 +64,17 @@ namespace Ryujinx.HLE.HOS.Services.Nfc.Nfp
             };
         }
 
-        public static RegisterInfo GetRegisterInfo(ITickSource tickSource, string amiiboId, string nickname)
+        public static RegisterInfo GetRegisterInfo(ITickSource tickSource, string amiiboId, string userName)
         {
             VirtualAmiiboFile amiiboFile = LoadAmiiboFile(amiiboId);
-
+            string nickname = amiiboFile.NickName ?? "Ryujinx";
             UtilityImpl utilityImpl = new(tickSource);
             CharInfo charInfo = new();
 
             charInfo.SetFromStoreData(StoreData.BuildDefault(utilityImpl, 0));
 
-            charInfo.Nickname = Nickname.FromString(nickname);
+            // This is the player's name
+            charInfo.Nickname = Nickname.FromString(userName);
 
             RegisterInfo registerInfo = new()
             {
@@ -85,7 +86,9 @@ namespace Ryujinx.HLE.HOS.Services.Nfc.Nfp
                 Reserved1 = new Array64<byte>(),
                 Reserved2 = new Array58<byte>(),
             };
-            "Ryujinx"u8.CopyTo(registerInfo.Nickname.AsSpan());
+            // This is the amiibo's name
+            byte[] nicknameBytes = System.Text.Encoding.UTF8.GetBytes(nickname);
+            nicknameBytes.CopyTo(registerInfo.Nickname.AsSpan());
 
             return registerInfo;
         }

src/Ryujinx.HLE/HOS/Services/Sockets/Bsd/IClient.cs

@@ -95,7 +95,7 @@ namespace Ryujinx.HLE.HOS.Services.Sockets.Bsd
                 }
             }
 
-            ISocket newBsdSocket = new ManagedSocket(netDomain, (SocketType)type, protocol)
+            ISocket newBsdSocket = new ManagedSocket(netDomain, (SocketType)type, protocol, context.Device.Configuration.MultiplayerLanInterfaceId)
             {
                 Blocking = !creationFlags.HasFlag(BsdSocketCreationFlags.NonBlocking),
             };

src/Ryujinx.HLE/HOS/Services/Sockets/Bsd/Impl/ManagedSocket.cs

@@ -1,4 +1,5 @@
 using Ryujinx.Common.Logging;
+using Ryujinx.HLE.HOS.Services.Sockets.Bsd.Proxy;
 using Ryujinx.HLE.HOS.Services.Sockets.Bsd.Types;
 using System;
 using System.Collections.Generic;
@@ -21,21 +22,21 @@ namespace Ryujinx.HLE.HOS.Services.Sockets.Bsd.Impl
 
         public bool Blocking { get => Socket.Blocking; set => Socket.Blocking = value; }
 
-        public nint Handle => Socket.Handle;
+        public nint Handle => IntPtr.Zero;
 
         public IPEndPoint RemoteEndPoint => Socket.RemoteEndPoint as IPEndPoint;
 
         public IPEndPoint LocalEndPoint => Socket.LocalEndPoint as IPEndPoint;
 
-        public Socket Socket { get; }
+        public ISocketImpl Socket { get; }
 
-        public ManagedSocket(AddressFamily addressFamily, SocketType socketType, ProtocolType protocolType)
+        public ManagedSocket(AddressFamily addressFamily, SocketType socketType, ProtocolType protocolType, string lanInterfaceId)
         {
-            Socket = new Socket(addressFamily, socketType, protocolType);
+            Socket = SocketHelpers.CreateSocket(addressFamily, socketType, protocolType, lanInterfaceId);
             Refcount = 1;
         }
 
-        private ManagedSocket(Socket socket)
+        private ManagedSocket(ISocketImpl socket)
         {
             Socket = socket;
             Refcount = 1;
@@ -185,6 +186,8 @@ namespace Ryujinx.HLE.HOS.Services.Sockets.Bsd.Impl
             }
         }
 
+        bool hasEmittedBlockingWarning = false;
+
         public LinuxError Receive(out int receiveSize, Span<byte> buffer, BsdSocketFlags flags)
         {
             LinuxError result;
@@ -199,6 +202,12 @@ namespace Ryujinx.HLE.HOS.Services.Sockets.Bsd.Impl
                     shouldBlockAfterOperation = true;
                 }
 
+                if (Blocking && !hasEmittedBlockingWarning)
+                {
+                    Logger.Warning?.PrintMsg(LogClass.ServiceBsd, "Blocking socket operations are not yet working properly. Expect network errors.");
+                    hasEmittedBlockingWarning = true;
+                }
+
                 receiveSize = Socket.Receive(buffer, ConvertBsdSocketFlags(flags));
 
                 result = LinuxError.SUCCESS;
@@ -236,6 +245,12 @@ namespace Ryujinx.HLE.HOS.Services.Sockets.Bsd.Impl
                     shouldBlockAfterOperation = true;
                 }
 
+                if (Blocking && !hasEmittedBlockingWarning)
+                {
+                    Logger.Warning?.PrintMsg(LogClass.ServiceBsd, "Blocking socket operations are not yet working properly. Expect network errors.");
+                    hasEmittedBlockingWarning = true;
+                }
+
                 if (!Socket.IsBound)
                 {
                     receiveSize = -1;
@@ -313,7 +328,7 @@ namespace Ryujinx.HLE.HOS.Services.Sockets.Bsd.Impl
                     Logger.Warning?.Print(LogClass.ServiceBsd, $"Unsupported GetSockOpt Option: {option} Level: {level}");
                     optionValue.Clear();
 
-                    return LinuxError.SUCCESS;
+                    return LinuxError.EOPNOTSUPP;
                 }
 
                 byte[] tempOptionValue = new byte[optionValue.Length];
@@ -347,7 +362,7 @@ namespace Ryujinx.HLE.HOS.Services.Sockets.Bsd.Impl
                 {
                     Logger.Warning?.Print(LogClass.ServiceBsd, $"Unsupported SetSockOpt Option: {option} Level: {level}");
 
-                    return LinuxError.SUCCESS;
+                    return LinuxError.EOPNOTSUPP;
                 }
 
                 int value = optionValue.Length >= 4 ? MemoryMarshal.Read<int>(optionValue) : MemoryMarshal.Read<byte>(optionValue);
@@ -493,7 +508,7 @@ namespace Ryujinx.HLE.HOS.Services.Sockets.Bsd.Impl
 
             try
             {
-                int receiveSize = Socket.Receive(ConvertMessagesToBuffer(message), ConvertBsdSocketFlags(flags), out SocketError socketError);
+                int receiveSize = (Socket as DefaultSocket).BaseSocket.Receive(ConvertMessagesToBuffer(message), ConvertBsdSocketFlags(flags), out SocketError socketError);
 
                 if (receiveSize > 0)
                 {
@@ -531,7 +546,7 @@ namespace Ryujinx.HLE.HOS.Services.Sockets.Bsd.Impl
 
             try
             {
-                int sendSize = Socket.Send(ConvertMessagesToBuffer(message), ConvertBsdSocketFlags(flags), out SocketError socketError);
+                int sendSize = (Socket as DefaultSocket).BaseSocket.Send(ConvertMessagesToBuffer(message), ConvertBsdSocketFlags(flags), out SocketError socketError);
 
                 if (sendSize > 0)
                 {

src/Ryujinx.HLE/HOS/Services/Sockets/Bsd/Impl/ManagedSocketPollManager.cs

@@ -1,4 +1,5 @@
 using Ryujinx.Common.Logging;
+using Ryujinx.HLE.HOS.Services.Sockets.Bsd.Proxy;
 using Ryujinx.HLE.HOS.Services.Sockets.Bsd.Types;
 using System.Collections.Generic;
 using System.Net.Sockets;
@@ -26,45 +27,46 @@ namespace Ryujinx.HLE.HOS.Services.Sockets.Bsd.Impl
 
         public LinuxError Poll(List<PollEvent> events, int timeoutMilliseconds, out int updatedCount)
         {
-            List<Socket> readEvents = new();
-            List<Socket> writeEvents = new();
-            List<Socket> errorEvents = new();
+            List<ISocketImpl> readEvents = new();
+            List<ISocketImpl> writeEvents = new();
+            List<ISocketImpl> errorEvents = new();
 
             updatedCount = 0;
 
             foreach (PollEvent evnt in events)
             {
-                ManagedSocket socket = (ManagedSocket)evnt.FileDescriptor;
-
-                bool isValidEvent = evnt.Data.InputEvents == 0;
-
-                errorEvents.Add(socket.Socket);
-
-                if ((evnt.Data.InputEvents & PollEventTypeMask.Input) != 0)
+                if (evnt.FileDescriptor is ManagedSocket ms)
                 {
-                    readEvents.Add(socket.Socket);
+                    bool isValidEvent = evnt.Data.InputEvents == 0;
 
-                    isValidEvent = true;
-                }
+                    errorEvents.Add(ms.Socket);
 
-                if ((evnt.Data.InputEvents & PollEventTypeMask.UrgentInput) != 0)
-                {
-                    readEvents.Add(socket.Socket);
+                    if ((evnt.Data.InputEvents & PollEventTypeMask.Input) != 0)
+                    {
+                        readEvents.Add(ms.Socket);
 
-                    isValidEvent = true;
-                }
+                        isValidEvent = true;
+                    }
 
-                if ((evnt.Data.InputEvents & PollEventTypeMask.Output) != 0)
-                {
-                    writeEvents.Add(socket.Socket);
+                    if ((evnt.Data.InputEvents & PollEventTypeMask.UrgentInput) != 0)
+                    {
+                        readEvents.Add(ms.Socket);
 
-                    isValidEvent = true;
-                }
+                        isValidEvent = true;
+                    }
 
-                if (!isValidEvent)
-                {
-                    Logger.Warning?.Print(LogClass.ServiceBsd, $"Unsupported Poll input event type: {evnt.Data.InputEvents}");
-                    return LinuxError.EINVAL;
+                    if ((evnt.Data.InputEvents & PollEventTypeMask.Output) != 0)
+                    {
+                        writeEvents.Add(ms.Socket);
+
+                        isValidEvent = true;
+                    }
+
+                    if (!isValidEvent)
+                    {
+                        Logger.Warning?.Print(LogClass.ServiceBsd, $"Unsupported Poll input event type: {evnt.Data.InputEvents}");
+                        return LinuxError.EINVAL;
+                    }
                 }
             }
 
@@ -72,7 +74,7 @@ namespace Ryujinx.HLE.HOS.Services.Sockets.Bsd.Impl
             {
                 int actualTimeoutMicroseconds = timeoutMilliseconds == -1 ? -1 : timeoutMilliseconds * 1000;
 
-                Socket.Select(readEvents, writeEvents, errorEvents, actualTimeoutMicroseconds);
+                SocketHelpers.Select(readEvents, writeEvents, errorEvents, actualTimeoutMicroseconds);
             }
             catch (SocketException exception)
             {
@@ -81,34 +83,37 @@ namespace Ryujinx.HLE.HOS.Services.Sockets.Bsd.Impl
 
             foreach (PollEvent evnt in events)
             {
-                Socket socket = ((ManagedSocket)evnt.FileDescriptor).Socket;
-
-                PollEventTypeMask outputEvents = evnt.Data.OutputEvents & ~evnt.Data.InputEvents;
-
-                if (errorEvents.Contains(socket))
+                if (evnt.FileDescriptor is ManagedSocket ms)
                 {
-                    outputEvents |= PollEventTypeMask.Error;
+                    ISocketImpl socket = ms.Socket;
 
-                    if (!socket.Connected || !socket.IsBound)
+                    PollEventTypeMask outputEvents = evnt.Data.OutputEvents & ~evnt.Data.InputEvents;
+
+                    if (errorEvents.Contains(ms.Socket))
                     {
-                        outputEvents |= PollEventTypeMask.Disconnected;
-                    }
-                }
+                        outputEvents |= PollEventTypeMask.Error;
 
-                if (readEvents.Contains(socket))
-                {
-                    if ((evnt.Data.InputEvents & PollEventTypeMask.Input) != 0)
+                        if (!socket.Connected || !socket.IsBound)
+                        {
+                            outputEvents |= PollEventTypeMask.Disconnected;
+                        }
+                    }
+
+                    if (readEvents.Contains(ms.Socket))
                     {
-                        outputEvents |= PollEventTypeMask.Input;
+                        if ((evnt.Data.InputEvents & PollEventTypeMask.Input) != 0)
+                        {
+                            outputEvents |= PollEventTypeMask.Input;
+                        }
                     }
-                }
 
-                if (writeEvents.Contains(socket))
-                {
-                    outputEvents |= PollEventTypeMask.Output;
-                }
+                    if (writeEvents.Contains(ms.Socket))
+                    {
+                        outputEvents |= PollEventTypeMask.Output;
+                    }
 
-                evnt.Data.OutputEvents = outputEvents;
+                    evnt.Data.OutputEvents = outputEvents;
+                }
             }
 
             updatedCount = readEvents.Count + writeEvents.Count + errorEvents.Count;
@@ -118,53 +123,55 @@ namespace Ryujinx.HLE.HOS.Services.Sockets.Bsd.Impl
 
         public LinuxError Select(List<PollEvent> events, int timeout, out int updatedCount)
         {
-            List<Socket> readEvents = new();
-            List<Socket> writeEvents = new();
-            List<Socket> errorEvents = new();
+            List<ISocketImpl> readEvents = new();
+            List<ISocketImpl> writeEvents = new();
+            List<ISocketImpl> errorEvents = new();
 
             updatedCount = 0;
 
             foreach (PollEvent pollEvent in events)
             {
-                ManagedSocket socket = (ManagedSocket)pollEvent.FileDescriptor;
-
-                if (pollEvent.Data.InputEvents.HasFlag(PollEventTypeMask.Input))
+                if (pollEvent.FileDescriptor is ManagedSocket ms)
                 {
-                    readEvents.Add(socket.Socket);
-                }
+                    if (pollEvent.Data.InputEvents.HasFlag(PollEventTypeMask.Input))
+                    {
+                        readEvents.Add(ms.Socket);
+                    }
 
-                if (pollEvent.Data.InputEvents.HasFlag(PollEventTypeMask.Output))
-                {
-                    writeEvents.Add(socket.Socket);
-                }
+                    if (pollEvent.Data.InputEvents.HasFlag(PollEventTypeMask.Output))
+                    {
+                        writeEvents.Add(ms.Socket);
+                    }
 
-                if (pollEvent.Data.InputEvents.HasFlag(PollEventTypeMask.Error))
-                {
-                    errorEvents.Add(socket.Socket);
+                    if (pollEvent.Data.InputEvents.HasFlag(PollEventTypeMask.Error))
+                    {
+                        errorEvents.Add(ms.Socket);
+                    }
                 }
             }
 
-            Socket.Select(readEvents, writeEvents, errorEvents, timeout);
+            SocketHelpers.Select(readEvents, writeEvents, errorEvents, timeout);
 
             updatedCount = readEvents.Count + writeEvents.Count + errorEvents.Count;
 
             foreach (PollEvent pollEvent in events)
             {
-                ManagedSocket socket = (ManagedSocket)pollEvent.FileDescriptor;
-
-                if (readEvents.Contains(socket.Socket))
+                if (pollEvent.FileDescriptor is ManagedSocket ms)
                 {
-                    pollEvent.Data.OutputEvents |= PollEventTypeMask.Input;
-                }
+                    if (readEvents.Contains(ms.Socket))
+                    {
+                        pollEvent.Data.OutputEvents |= PollEventTypeMask.Input;
+                    }
 
-                if (writeEvents.Contains(socket.Socket))
-                {
-                    pollEvent.Data.OutputEvents |= PollEventTypeMask.Output;
-                }
+                    if (writeEvents.Contains(ms.Socket))
+                    {
+                        pollEvent.Data.OutputEvents |= PollEventTypeMask.Output;
+                    }
 
-                if (errorEvents.Contains(socket.Socket))
-                {
-                    pollEvent.Data.OutputEvents |= PollEventTypeMask.Error;
+                    if (errorEvents.Contains(ms.Socket))
+                    {
+                        pollEvent.Data.OutputEvents |= PollEventTypeMask.Error;
+                    }
                 }
             }
 

src/Ryujinx.HLE/HOS/Services/Sockets/Bsd/Proxy/DefaultSocket.cs

@@ -0,0 +1,178 @@
+using Ryujinx.Common.Utilities;
+using System;
+using System.Net;
+using System.Net.NetworkInformation;
+using System.Net.Sockets;
+
+namespace Ryujinx.HLE.HOS.Services.Sockets.Bsd.Proxy
+{
+    class DefaultSocket : ISocketImpl
+    {
+        public Socket BaseSocket { get; }
+
+        public EndPoint RemoteEndPoint => BaseSocket.RemoteEndPoint;
+
+        public EndPoint LocalEndPoint => BaseSocket.LocalEndPoint;
+
+        public bool Connected => BaseSocket.Connected;
+
+        public bool IsBound => BaseSocket.IsBound;
+
+        public AddressFamily AddressFamily => BaseSocket.AddressFamily;
+
+        public SocketType SocketType => BaseSocket.SocketType;
+
+        public ProtocolType ProtocolType => BaseSocket.ProtocolType;
+
+        public bool Blocking { get => BaseSocket.Blocking; set => BaseSocket.Blocking = value; }
+
+        public int Available => BaseSocket.Available;
+
+        private readonly string _lanInterfaceId;
+
+        public DefaultSocket(Socket baseSocket, string lanInterfaceId)
+        {
+            _lanInterfaceId = lanInterfaceId;
+
+            BaseSocket = baseSocket;
+        }
+
+        public DefaultSocket(AddressFamily domain, SocketType type, ProtocolType protocol, string lanInterfaceId)
+        {
+            _lanInterfaceId = lanInterfaceId;
+
+            BaseSocket = new Socket(domain, type, protocol);
+        }
+
+        private void EnsureNetworkInterfaceBound()
+        {
+            if (_lanInterfaceId != "0" && !BaseSocket.IsBound)
+            {
+                (_, UnicastIPAddressInformation ipInfo) = NetworkHelpers.GetLocalInterface(_lanInterfaceId);
+
+                BaseSocket.Bind(new IPEndPoint(ipInfo.Address, 0));
+            }
+        }
+
+        public ISocketImpl Accept()
+        {
+            return new DefaultSocket(BaseSocket.Accept(), _lanInterfaceId);
+        }
+
+        public void Bind(EndPoint localEP)
+        {
+            // NOTE: The guest is able to receive on 0.0.0.0 without it being limited to the chosen network interface.
+            // This is because it must get loopback traffic as well. This could allow other network traffic to leak in.
+
+            BaseSocket.Bind(localEP);
+        }
+
+        public void Close()
+        {
+            BaseSocket.Close();
+        }
+
+        public void Connect(EndPoint remoteEP)
+        {
+            EnsureNetworkInterfaceBound();
+
+            BaseSocket.Connect(remoteEP);
+        }
+
+        public void Disconnect(bool reuseSocket)
+        {
+            BaseSocket.Disconnect(reuseSocket);
+        }
+
+        public void GetSocketOption(SocketOptionLevel optionLevel, SocketOptionName optionName, byte[] optionValue)
+        {
+            BaseSocket.GetSocketOption(optionLevel, optionName, optionValue);
+        }
+
+        public void Listen(int backlog)
+        {
+            BaseSocket.Listen(backlog);
+        }
+
+        public int Receive(Span<byte> buffer)
+        {
+            EnsureNetworkInterfaceBound();
+
+            return BaseSocket.Receive(buffer);
+        }
+
+        public int Receive(Span<byte> buffer, SocketFlags flags)
+        {
+            EnsureNetworkInterfaceBound();
+
+            return BaseSocket.Receive(buffer, flags);
+        }
+
+        public int Receive(Span<byte> buffer, SocketFlags flags, out SocketError socketError)
+        {
+            EnsureNetworkInterfaceBound();
+
+            return BaseSocket.Receive(buffer, flags, out socketError);
+        }
+
+        public int ReceiveFrom(Span<byte> buffer, SocketFlags flags, ref EndPoint remoteEP)
+        {
+            EnsureNetworkInterfaceBound();
+
+            return BaseSocket.ReceiveFrom(buffer, flags, ref remoteEP);
+        }
+
+        public int Send(ReadOnlySpan<byte> buffer)
+        {
+            EnsureNetworkInterfaceBound();
+
+            return BaseSocket.Send(buffer);
+        }
+
+        public int Send(ReadOnlySpan<byte> buffer, SocketFlags flags)
+        {
+            EnsureNetworkInterfaceBound();
+
+            return BaseSocket.Send(buffer, flags);
+        }
+
+        public int Send(ReadOnlySpan<byte> buffer, SocketFlags flags, out SocketError socketError)
+        {
+            EnsureNetworkInterfaceBound();
+
+            return BaseSocket.Send(buffer, flags, out socketError);
+        }
+
+        public int SendTo(ReadOnlySpan<byte> buffer, SocketFlags flags, EndPoint remoteEP)
+        {
+            EnsureNetworkInterfaceBound();
+
+            return BaseSocket.SendTo(buffer, flags, remoteEP);
+        }
+
+        public bool Poll(int microSeconds, SelectMode mode)
+        {
+            return BaseSocket.Poll(microSeconds, mode);
+        }
+
+        public void SetSocketOption(SocketOptionLevel optionLevel, SocketOptionName optionName, int optionValue)
+        {
+            BaseSocket.SetSocketOption(optionLevel, optionName, optionValue);
+        }
+
+        public void SetSocketOption(SocketOptionLevel optionLevel, SocketOptionName optionName, object optionValue)
+        {
+            BaseSocket.SetSocketOption(optionLevel, optionName, optionValue);
+        }
+
+        public void Shutdown(SocketShutdown how)
+        {
+            BaseSocket.Shutdown(how);
+        }
+
+        public void Dispose()
+        {
+            BaseSocket.Dispose();
+        }
+    }
+}

src/Ryujinx.HLE/HOS/Services/Sockets/Bsd/Proxy/ISocket.cs

@@ -0,0 +1,47 @@
+using System;
+using System.Net;
+using System.Net.Sockets;
+
+namespace Ryujinx.HLE.HOS.Services.Sockets.Bsd.Proxy
+{
+    interface ISocketImpl : IDisposable
+    {
+        EndPoint RemoteEndPoint { get; }
+        EndPoint LocalEndPoint { get; }
+        bool Connected { get; }
+        bool IsBound { get; }
+
+        AddressFamily AddressFamily { get; }
+        SocketType SocketType { get; }
+        ProtocolType ProtocolType { get; }
+
+        bool Blocking { get; set; }
+        int Available { get; }
+
+        int Receive(Span<byte> buffer);
+        int Receive(Span<byte> buffer, SocketFlags flags);
+        int Receive(Span<byte> buffer, SocketFlags flags, out SocketError socketError);
+        int ReceiveFrom(Span<byte> buffer, SocketFlags flags, ref EndPoint remoteEP);
+
+        int Send(ReadOnlySpan<byte> buffer);
+        int Send(ReadOnlySpan<byte> buffer, SocketFlags flags);
+        int Send(ReadOnlySpan<byte> buffer, SocketFlags flags, out SocketError socketError);
+        int SendTo(ReadOnlySpan<byte> buffer, SocketFlags flags, EndPoint remoteEP);
+
+        bool Poll(int microSeconds, SelectMode mode);
+
+        ISocketImpl Accept();
+
+        void Bind(EndPoint localEP);
+        void Connect(EndPoint remoteEP);
+        void Listen(int backlog);
+
+        void GetSocketOption(SocketOptionLevel optionLevel, SocketOptionName optionName, byte[] optionValue);
+        void SetSocketOption(SocketOptionLevel optionLevel, SocketOptionName optionName, int optionValue);
+        void SetSocketOption(SocketOptionLevel optionLevel, SocketOptionName optionName, object optionValue);
+
+        void Shutdown(SocketShutdown how);
+        void Disconnect(bool reuseSocket);
+        void Close();
+    }
+}

src/Ryujinx.HLE/HOS/Services/Sockets/Bsd/Proxy/SocketHelpers.cs

@@ -0,0 +1,74 @@
+using Ryujinx.HLE.HOS.Services.Ldn.UserServiceCreator.LdnRyu.Proxy;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Net.Sockets;
+
+namespace Ryujinx.HLE.HOS.Services.Sockets.Bsd.Proxy
+{
+    static class SocketHelpers
+    {
+        private static LdnProxy _proxy;
+
+        public static void Select(List<ISocketImpl> readEvents, List<ISocketImpl> writeEvents, List<ISocketImpl> errorEvents, int timeout)
+        {
+            var readDefault = readEvents.Select(x => (x as DefaultSocket)?.BaseSocket).Where(x => x != null).ToList();
+            var writeDefault = writeEvents.Select(x => (x as DefaultSocket)?.BaseSocket).Where(x => x != null).ToList();
+            var errorDefault = errorEvents.Select(x => (x as DefaultSocket)?.BaseSocket).Where(x => x != null).ToList();
+
+            if (readDefault.Count != 0 || writeDefault.Count != 0 || errorDefault.Count != 0)
+            {
+                Socket.Select(readDefault, writeDefault, errorDefault, timeout);
+            }
+
+            void FilterSockets(List<ISocketImpl> removeFrom, List<Socket> selectedSockets, Func<LdnProxySocket, bool> ldnCheck)
+            {
+                removeFrom.RemoveAll(socket =>
+                {
+                    switch (socket)
+                    {
+                        case DefaultSocket dsocket:
+                            return !selectedSockets.Contains(dsocket.BaseSocket);
+                        case LdnProxySocket psocket:
+                            return !ldnCheck(psocket);
+                        default:
+                            throw new NotImplementedException();
+                    }
+                });
+            };
+
+            FilterSockets(readEvents, readDefault, (socket) => socket.Readable);
+            FilterSockets(writeEvents, writeDefault, (socket) => socket.Writable);
+            FilterSockets(errorEvents, errorDefault, (socket) => socket.Error);
+        }
+
+        public static void RegisterProxy(LdnProxy proxy)
+        {
+            if (_proxy != null)
+            {
+                UnregisterProxy();
+            }
+
+            _proxy = proxy;
+        }
+
+        public static void UnregisterProxy()
+        {
+            _proxy?.Dispose();
+            _proxy = null;
+        }
+
+        public static ISocketImpl CreateSocket(AddressFamily domain, SocketType type, ProtocolType protocol, string lanInterfaceId)
+        {
+            if (_proxy != null)
+            {
+                if (_proxy.Supported(domain, type, protocol))
+                {
+                    return new LdnProxySocket(domain, type, protocol, _proxy);
+                }
+            }
+
+            return new DefaultSocket(domain, type, protocol, lanInterfaceId);
+        }
+    }
+}

src/Ryujinx.HLE/HOS/Services/Sockets/Sfdnsres/IResolver.cs

@@ -292,7 +292,7 @@ namespace Ryujinx.HLE.HOS.Services.Sockets.Sfdnsres
         {
             string host = MemoryHelper.ReadAsciiString(context.Memory, inputBufferPosition, (int)inputBufferSize);
 
-            if (!context.Device.Configuration.EnableInternetAccess)
+            if (host != "localhost" && !context.Device.Configuration.EnableInternetAccess)
             {
                 Logger.Info?.Print(LogClass.ServiceSfdnsres, $"Guest network access disabled, DNS Blocked: {host}");
 

src/Ryujinx.HLE/HOS/Services/Ssl/SslService/SslManagedSocketConnection.cs

@@ -1,5 +1,6 @@
 using Ryujinx.HLE.HOS.Services.Sockets.Bsd;
 using Ryujinx.HLE.HOS.Services.Sockets.Bsd.Impl;
+using Ryujinx.HLE.HOS.Services.Sockets.Bsd.Proxy;
 using Ryujinx.HLE.HOS.Services.Ssl.Types;
 using System;
 using System.IO;
@@ -116,7 +117,7 @@ namespace Ryujinx.HLE.HOS.Services.Ssl.SslService
         public ResultCode Handshake(string hostName)
         {
             StartSslOperation();
-            _stream = new SslStream(new NetworkStream(((ManagedSocket)Socket).Socket, false), false, null, null);
+            _stream = new SslStream(new NetworkStream(((DefaultSocket)((ManagedSocket)Socket).Socket).BaseSocket, false), false, null, null);
             hostName = RetrieveHostName(hostName);
             _stream.AuthenticateAsClient(hostName, null, TranslateSslVersion(_sslVersion), false);
             EndSslOperation();

src/Ryujinx.HLE/Loaders/Processes/ProcessResult.cs

@@ -85,8 +85,8 @@ namespace Ryujinx.HLE.Loaders.Processes
             }
 
             // TODO: LibHac npdm currently doesn't support version field.
-            string version = ProgramId > 0x0100000000007FFF 
-                ? DisplayVersion 
+            string version = ProgramId > 0x0100000000007FFF
+                ? DisplayVersion
                 : device.System.ContentManager.GetCurrentFirmwareVersion()?.VersionString ?? "?";
 
             Logger.Info?.Print(LogClass.Loader, $"Application Loaded: {Name} v{version} [{ProgramIdText}] [{(Is64Bit ? "64-bit" : "32-bit")}]");

src/Ryujinx.HLE/Ryujinx.HLE.csproj

@@ -29,6 +29,7 @@
     <PackageReference Include="SkiaSharp" />
     <PackageReference Include="SkiaSharp.NativeAssets.Linux" />
     <PackageReference Include="NetCoreServer" />
+    <PackageReference Include="Open.NAT.Core" />
   </ItemGroup>
 
   <ItemGroup>

src/Ryujinx.Headless.SDL2/OpenGL/OpenGLWindow.cs

@@ -117,8 +117,9 @@ namespace Ryujinx.Headless.SDL2.OpenGL
             GraphicsDebugLevel glLogLevel,
             AspectRatio aspectRatio,
             bool enableMouse,
-            HideCursorMode hideCursorMode)
-            : base(inputManager, glLogLevel, aspectRatio, enableMouse, hideCursorMode)
+            HideCursorMode hideCursorMode,
+            bool ignoreControllerApplet)
+            : base(inputManager, glLogLevel, aspectRatio, enableMouse, hideCursorMode, ignoreControllerApplet)
         {
             _glLogLevel = glLogLevel;
         }

src/Ryujinx.Headless.SDL2/Options.cs

@@ -225,6 +225,9 @@ namespace Ryujinx.Headless.SDL2
 
         [Option("ignore-missing-services", Required = false, Default = false, HelpText = "Enable ignoring missing services.")]
         public bool IgnoreMissingServices { get; set; }
+        
+        [Option("ignore-controller-applet", Required = false, Default = false, HelpText = "Enable ignoring the controller applet when your game loses connection to your controller.")]
+        public bool IgnoreControllerApplet { get; set; }
 
         // Values
 

src/Ryujinx.Headless.SDL2/Program.cs

@@ -444,8 +444,7 @@ namespace Ryujinx.Headless.SDL2
                 {
                     Logger.AddTarget(new AsyncLogTargetWrapper(
                         new FileLogTarget("file", logFile),
-                        1000,
-                        AsyncLogTargetOverflowAction.Block
+                        1000
                     ));
                 }
                 else
@@ -506,8 +505,8 @@ namespace Ryujinx.Headless.SDL2
         private static WindowBase CreateWindow(Options options)
         {
             return options.GraphicsBackend == GraphicsBackend.Vulkan
-                ? new VulkanWindow(_inputManager, options.LoggingGraphicsDebugLevel, options.AspectRatio, options.EnableMouse, options.HideCursorMode)
-                : new OpenGLWindow(_inputManager, options.LoggingGraphicsDebugLevel, options.AspectRatio, options.EnableMouse, options.HideCursorMode);
+                ? new VulkanWindow(_inputManager, options.LoggingGraphicsDebugLevel, options.AspectRatio, options.EnableMouse, options.HideCursorMode, options.IgnoreControllerApplet)
+                : new OpenGLWindow(_inputManager, options.LoggingGraphicsDebugLevel, options.AspectRatio, options.EnableMouse, options.HideCursorMode, options.IgnoreControllerApplet);
         }
 
         private static IRenderer CreateRenderer(Options options, WindowBase window)
@@ -578,7 +577,10 @@ namespace Ryujinx.Headless.SDL2
                 options.AudioVolume,
                 options.UseHypervisor ?? true,
                 options.MultiplayerLanInterfaceId,
-                Common.Configuration.Multiplayer.MultiplayerMode.Disabled);
+                Common.Configuration.Multiplayer.MultiplayerMode.Disabled,
+                false,
+                "",
+                "");
 
             return new Switch(configuration);
         }

src/Ryujinx.Headless.SDL2/Ryujinx.Headless.SDL2.csproj

@@ -1,4 +1,4 @@
-<Project Sdk="Microsoft.NET.Sdk">
+<Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
     <TargetFramework>net8.0</TargetFramework>
@@ -17,7 +17,7 @@
   </ItemGroup>
 
   <Target Name="PostBuild" AfterTargets="PostBuildEvent" Condition="$([MSBuild]::IsOSPlatform('OSX'))">
-    <Exec Command="codesign --entitlements '$(ProjectDir)..\..\distribution\macos\entitlements.xml' -f --deep -s $(SigningCertificate) '$(TargetDir)$(TargetName)'" />
+    <Exec Command="codesign --entitlements '$(ProjectDir)..\..\distribution\macos\entitlements.xml' -f -s $(SigningCertificate) '$(TargetDir)$(TargetName)'" />
   </Target>
 
   <ItemGroup>

src/Ryujinx.Headless.SDL2/Vulkan/VulkanWindow.cs

@@ -17,8 +17,9 @@ namespace Ryujinx.Headless.SDL2.Vulkan
             GraphicsDebugLevel glLogLevel,
             AspectRatio aspectRatio,
             bool enableMouse,
-            HideCursorMode hideCursorMode)
-            : base(inputManager, glLogLevel, aspectRatio, enableMouse, hideCursorMode)
+            HideCursorMode hideCursorMode,
+            bool ignoreControllerApplet)
+            : base(inputManager, glLogLevel, aspectRatio, enableMouse, hideCursorMode, ignoreControllerApplet)
         {
             _glLogLevel = glLogLevel;
         }

src/Ryujinx.Headless.SDL2/WindowBase.cs

@@ -86,13 +86,15 @@ namespace Ryujinx.Headless.SDL2
 
         private readonly AspectRatio _aspectRatio;
         private readonly bool _enableMouse;
+        private readonly bool _ignoreControllerApplet;
 
         public WindowBase(
             InputManager inputManager,
             GraphicsDebugLevel glLogLevel,
             AspectRatio aspectRatio,
             bool enableMouse,
-            HideCursorMode hideCursorMode)
+            HideCursorMode hideCursorMode,
+            bool ignoreControllerApplet)
         {
             MouseDriver = new SDL2MouseDriver(hideCursorMode);
             _inputManager = inputManager;
@@ -108,6 +110,7 @@ namespace Ryujinx.Headless.SDL2
             _gpuDoneEvent = new ManualResetEvent(false);
             _aspectRatio = aspectRatio;
             _enableMouse = enableMouse;
+            _ignoreControllerApplet = ignoreControllerApplet;
             HostUITheme = new HeadlessHostUiTheme();
 
             SDL2Driver.Instance.Initialize();
@@ -484,6 +487,8 @@ namespace Ryujinx.Headless.SDL2
 
         public bool DisplayMessageDialog(ControllerAppletUIArgs args)
         {
+            if (_ignoreControllerApplet) return false;
+            
             string playerCount = args.PlayerCountMin == args.PlayerCountMax ? $"exactly {args.PlayerCountMin}" : $"{args.PlayerCountMin}-{args.PlayerCountMax}";
 
             string message = $"Application requests {playerCount} {"player".ToQuantity(args.PlayerCountMin + args.PlayerCountMax, ShowQuantityAs.None)} with:\n\n"

src/Ryujinx.Input.SDL2/SDL2GamepadDriver.cs

@@ -115,7 +115,10 @@ namespace Ryujinx.Input.SDL2
                 {
                     lock (_lock)
                     {
-                        _gamepadsIds.Insert(joystickDeviceId, id);
+                        if (joystickDeviceId <= _gamepadsIds.FindLastIndex(_ => true))
+                            _gamepadsIds.Insert(joystickDeviceId, id);
+                        else
+                            _gamepadsIds.Add(id);
                     }
 
                     OnGamepadConnected?.Invoke(id);

src/Ryujinx.UI.Common/App/ApplicationData.cs

@@ -27,6 +27,8 @@ namespace Ryujinx.UI.App.Common
         public ulong Id { get; set; }
         public string Developer { get; set; } = "Unknown";
         public string Version { get; set; } = "0";
+        public int PlayerCount { get; set; }
+        public int GameCount { get; set; }
         public TimeSpan TimePlayed { get; set; }
         public DateTime? LastPlayed { get; set; }
         public string FileExtension { get; set; }

src/Ryujinx.UI.Common/App/ApplicationLibrary.cs

@@ -12,6 +12,7 @@ using LibHac.Tools.Fs;
 using LibHac.Tools.FsSystem;
 using LibHac.Tools.FsSystem.NcaUtils;
 using Ryujinx.Common.Configuration;
+using Ryujinx.Common.Configuration.Multiplayer;
 using Ryujinx.Common.Logging;
 using Ryujinx.Common.Utilities;
 using Ryujinx.HLE.FileSystem;
@@ -27,10 +28,12 @@ using System;
 using System.Collections.Generic;
 using System.IO;
 using System.Linq;
+using System.Net.Http;
 using System.Reflection;
 using System.Text;
 using System.Text.Json;
 using System.Threading;
+using System.Threading.Tasks;
 using ContentType = LibHac.Ncm.ContentType;
 using MissingKeyException = LibHac.Common.Keys.MissingKeyException;
 using Path = System.IO.Path;
@@ -41,8 +44,10 @@ namespace Ryujinx.UI.App.Common
 {
     public class ApplicationLibrary
     {
+        public static string DefaultLanPlayWebHost = "ryuldnweb.vudjun.com";
         public Language DesiredLanguage { get; set; }
         public event EventHandler<ApplicationCountUpdatedEventArgs> ApplicationCountUpdated;
+        public event EventHandler<LdnGameDataReceivedEventArgs> LdnGameDataReceived;
 
         public readonly IObservableCache<ApplicationData, ulong> Applications;
         public readonly IObservableCache<(TitleUpdateModel TitleUpdate, bool IsSelected), TitleUpdateModel> TitleUpdates;
@@ -62,6 +67,7 @@ namespace Ryujinx.UI.App.Common
         private readonly SourceCache<(DownloadableContentModel Dlc, bool IsEnabled), DownloadableContentModel> _downloadableContents = new(it => it.Dlc);
 
         private static readonly ApplicationJsonSerializerContext _serializerContext = new(JsonHelper.GetDefaultSerializerOptions());
+        private static readonly LdnGameDataSerializerContext _ldnDataSerializerContext = new(JsonHelper.GetDefaultSerializerOptions());
 
         public ApplicationLibrary(VirtualFileSystem virtualFileSystem, IntegrityCheckLevel checkLevel)
         {
@@ -687,7 +693,7 @@ namespace Ryujinx.UI.App.Common
                                 (Path.GetExtension(file).ToLower() is ".pfs0" && ConfigurationState.Instance.UI.ShownFileTypes.PFS0) ||
                                 (Path.GetExtension(file).ToLower() is ".xci" && ConfigurationState.Instance.UI.ShownFileTypes.XCI) ||
                                 (Path.GetExtension(file).ToLower() is ".nca" && ConfigurationState.Instance.UI.ShownFileTypes.NCA) ||
-                                (Path.GetExtension(file).ToLower() is ".nro" && ConfigurationState.Instance.UI.ShownFileTypes.NRO) || 
+                                (Path.GetExtension(file).ToLower() is ".nro" && ConfigurationState.Instance.UI.ShownFileTypes.NRO) ||
                                 (Path.GetExtension(file).ToLower() is ".nso" && ConfigurationState.Instance.UI.ShownFileTypes.NSO)
                             );
 
@@ -719,6 +725,7 @@ namespace Ryujinx.UI.App.Common
                     }
                 }
 
+
                 // Loops through applications list, creating a struct and then firing an event containing the struct for each application
                 foreach (string applicationPath in applicationPaths)
                 {
@@ -775,6 +782,46 @@ namespace Ryujinx.UI.App.Common
             }
         }
 
+        public async Task RefreshLdn()
+        {
+
+            if (ConfigurationState.Instance.Multiplayer.Mode == MultiplayerMode.LdnRyu)
+            {
+                try
+                {
+                    string ldnWebHost = ConfigurationState.Instance.Multiplayer.LdnServer;
+                    if (string.IsNullOrEmpty(ldnWebHost))
+                    {
+                        ldnWebHost = DefaultLanPlayWebHost;
+                    }
+                    IEnumerable<LdnGameData> ldnGameDataArray = Array.Empty<LdnGameData>();
+                    using HttpClient httpClient = new HttpClient();
+                    string ldnGameDataArrayString = await httpClient.GetStringAsync($"https://{ldnWebHost}/api/public_games");
+                    ldnGameDataArray = JsonHelper.Deserialize(ldnGameDataArrayString, _ldnDataSerializerContext.IEnumerableLdnGameData);
+                    var evt = new LdnGameDataReceivedEventArgs
+                    {
+                        LdnData = ldnGameDataArray
+                    };
+                    LdnGameDataReceived?.Invoke(null, evt);
+                }
+                catch (Exception ex)
+                {
+                    Logger.Warning?.Print(LogClass.Application, $"Failed to fetch the public games JSON from the API. Player and game count in the game list will be unavailable.\n{ex.Message}");
+                    LdnGameDataReceived?.Invoke(null, new LdnGameDataReceivedEventArgs()
+                    {
+                        LdnData = Array.Empty<LdnGameData>()
+                    });
+                }
+            }
+            else
+            {
+                LdnGameDataReceived?.Invoke(null, new LdnGameDataReceivedEventArgs()
+                {
+                    LdnData = Array.Empty<LdnGameData>()
+                });
+            }
+        }
+
         // Replace the currently stored DLC state for the game with the provided DLC state.
         public void SaveDownloadableContentsForGame(ApplicationData application, List<(DownloadableContentModel, bool IsEnabled)> dlcs)
         {

src/Ryujinx.UI.Common/App/LdnGameData.cs

@@ -0,0 +1,16 @@
+using System.Collections.Generic;
+
+namespace Ryujinx.UI.App.Common
+{
+    public struct LdnGameData
+    {
+        public string Id { get; set; }
+        public int PlayerCount { get; set; }
+        public int MaxPlayerCount { get; set; }
+        public string GameName { get; set; }
+        public string TitleId { get; set; }
+        public string Mode { get; set; }
+        public string Status { get; set; }
+        public IEnumerable<string> Players { get; set; }
+    }
+}

src/Ryujinx.UI.Common/App/LdnGameDataReceivedEventArgs.cs

@@ -0,0 +1,10 @@
+using System;
+using System.Collections.Generic;
+
+namespace Ryujinx.UI.App.Common
+{
+    public class LdnGameDataReceivedEventArgs : EventArgs
+    {
+        public IEnumerable<LdnGameData> LdnData { get; set; }
+    }
+}

src/Ryujinx.UI.Common/App/LdnGameDataSerializerContext.cs

@@ -0,0 +1,11 @@
+using System.Collections.Generic;
+using System.Text.Json.Serialization;
+
+namespace Ryujinx.UI.App.Common
+{
+    [JsonSerializable(typeof(IEnumerable<LdnGameData>))]
+    internal partial class LdnGameDataSerializerContext : JsonSerializerContext
+    {
+
+    }
+}

src/Ryujinx.UI.Common/Configuration/ConfigurationFileFormat.cs

@@ -392,6 +392,21 @@ namespace Ryujinx.UI.Common.Configuration
         /// </summary>
         public string MultiplayerLanInterfaceId { get; set; }
 
+        /// <summary>
+        /// Disable P2p Toggle
+        /// </summary>
+        public bool MultiplayerDisableP2p { get; set; }
+
+        /// <summary>
+        /// Local network passphrase, for private networks.
+        /// </summary>
+        public string MultiplayerLdnPassphrase { get; set; }
+
+        /// <summary>
+        /// Custom LDN Server
+        /// </summary>
+        public string LdnServer { get; set; }
+
         /// <summary>
         /// Uses Hypervisor over JIT if available
         /// </summary>

src/Ryujinx.UI.Common/Configuration/ConfigurationState.Migration.cs

@@ -0,0 +1,718 @@
+using Ryujinx.Common.Configuration;
+using Ryujinx.Common.Configuration.Hid;
+using Ryujinx.Common.Configuration.Hid.Controller;
+using Ryujinx.Common.Configuration.Hid.Keyboard;
+using Ryujinx.Common.Configuration.Multiplayer;
+using Ryujinx.Common.Logging;
+using Ryujinx.HLE;
+using Ryujinx.UI.Common.Configuration.System;
+using Ryujinx.UI.Common.Configuration.UI;
+using System;
+using System.Collections.Generic;
+
+namespace Ryujinx.UI.Common.Configuration
+{
+    public partial class ConfigurationState
+    {
+        public void Load(ConfigurationFileFormat configurationFileFormat, string configurationFilePath)
+        {
+            bool configurationFileUpdated = false;
+
+            if (configurationFileFormat.Version is < 0 or > ConfigurationFileFormat.CurrentVersion)
+            {
+                Ryujinx.Common.Logging.Logger.Warning?.Print(LogClass.Application, $"Unsupported configuration version {configurationFileFormat.Version}, loading default.");
+
+                LoadDefault();
+            }
+
+            if (configurationFileFormat.Version < 2)
+            {
+                Ryujinx.Common.Logging.Logger.Warning?.Print(LogClass.Application, $"Outdated configuration version {configurationFileFormat.Version}, migrating to version 2.");
+
+                configurationFileFormat.SystemRegion = Region.USA;
+
+                configurationFileUpdated = true;
+            }
+
+            if (configurationFileFormat.Version < 3)
+            {
+                Ryujinx.Common.Logging.Logger.Warning?.Print(LogClass.Application, $"Outdated configuration version {configurationFileFormat.Version}, migrating to version 3.");
+
+                configurationFileFormat.SystemTimeZone = "UTC";
+
+                configurationFileUpdated = true;
+            }
+
+            if (configurationFileFormat.Version < 4)
+            {
+                Ryujinx.Common.Logging.Logger.Warning?.Print(LogClass.Application, $"Outdated configuration version {configurationFileFormat.Version}, migrating to version 4.");
+
+                configurationFileFormat.MaxAnisotropy = -1;
+
+                configurationFileUpdated = true;
+            }
+
+            if (configurationFileFormat.Version < 5)
+            {
+                Ryujinx.Common.Logging.Logger.Warning?.Print(LogClass.Application, $"Outdated configuration version {configurationFileFormat.Version}, migrating to version 5.");
+
+                configurationFileFormat.SystemTimeOffset = 0;
+
+                configurationFileUpdated = true;
+            }
+
+            if (configurationFileFormat.Version < 8)
+            {
+                Ryujinx.Common.Logging.Logger.Warning?.Print(LogClass.Application, $"Outdated configuration version {configurationFileFormat.Version}, migrating to version 8.");
+
+                configurationFileFormat.EnablePtc = true;
+
+                configurationFileUpdated = true;
+            }
+
+            if (configurationFileFormat.Version < 9)
+            {
+                Ryujinx.Common.Logging.Logger.Warning?.Print(LogClass.Application, $"Outdated configuration version {configurationFileFormat.Version}, migrating to version 9.");
+
+                configurationFileFormat.ColumnSort = new ColumnSort
+                {
+                    SortColumnId = 0,
+                    SortAscending = false,
+                };
+
+                configurationFileFormat.Hotkeys = new KeyboardHotkeys
+                {
+                    ToggleVsync = Key.F1,
+                };
+
+                configurationFileUpdated = true;
+            }
+
+            if (configurationFileFormat.Version < 10)
+            {
+                Ryujinx.Common.Logging.Logger.Warning?.Print(LogClass.Application, $"Outdated configuration version {configurationFileFormat.Version}, migrating to version 10.");
+
+                configurationFileFormat.AudioBackend = AudioBackend.OpenAl;
+
+                configurationFileUpdated = true;
+            }
+
+            if (configurationFileFormat.Version < 11)
+            {
+                Ryujinx.Common.Logging.Logger.Warning?.Print(LogClass.Application, $"Outdated configuration version {configurationFileFormat.Version}, migrating to version 11.");
+
+                configurationFileFormat.ResScale = 1;
+                configurationFileFormat.ResScaleCustom = 1.0f;
+
+                configurationFileUpdated = true;
+            }
+
+            if (configurationFileFormat.Version < 12)
+            {
+                Ryujinx.Common.Logging.Logger.Warning?.Print(LogClass.Application, $"Outdated configuration version {configurationFileFormat.Version}, migrating to version 12.");
+
+                configurationFileFormat.LoggingGraphicsDebugLevel = GraphicsDebugLevel.None;
+
+                configurationFileUpdated = true;
+            }
+
+            // configurationFileFormat.Version == 13 -> LDN1
+
+            if (configurationFileFormat.Version < 14)
+            {
+                Ryujinx.Common.Logging.Logger.Warning?.Print(LogClass.Application, $"Outdated configuration version {configurationFileFormat.Version}, migrating to version 14.");
+
+                configurationFileFormat.CheckUpdatesOnStart = true;
+
+                configurationFileUpdated = true;
+            }
+
+            if (configurationFileFormat.Version < 16)
+            {
+                Ryujinx.Common.Logging.Logger.Warning?.Print(LogClass.Application, $"Outdated configuration version {configurationFileFormat.Version}, migrating to version 16.");
+
+                configurationFileFormat.EnableShaderCache = true;
+
+                configurationFileUpdated = true;
+            }
+
+            if (configurationFileFormat.Version < 17)
+            {
+                Ryujinx.Common.Logging.Logger.Warning?.Print(LogClass.Application, $"Outdated configuration version {configurationFileFormat.Version}, migrating to version 17.");
+
+                configurationFileFormat.StartFullscreen = false;
+
+                configurationFileUpdated = true;
+            }
+
+            if (configurationFileFormat.Version < 18)
+            {
+                Ryujinx.Common.Logging.Logger.Warning?.Print(LogClass.Application, $"Outdated configuration version {configurationFileFormat.Version}, migrating to version 18.");
+
+                configurationFileFormat.AspectRatio = AspectRatio.Fixed16x9;
+
+                configurationFileUpdated = true;
+            }
+
+            // configurationFileFormat.Version == 19 -> LDN2
+
+            if (configurationFileFormat.Version < 20)
+            {
+                Ryujinx.Common.Logging.Logger.Warning?.Print(LogClass.Application, $"Outdated configuration version {configurationFileFormat.Version}, migrating to version 20.");
+
+                configurationFileFormat.ShowConfirmExit = true;
+
+                configurationFileUpdated = true;
+            }
+
+            if (configurationFileFormat.Version < 21)
+            {
+                Ryujinx.Common.Logging.Logger.Warning?.Print(LogClass.Application, $"Outdated configuration version {configurationFileFormat.Version}, migrating to version 21.");
+
+                // Initialize network config.
+
+                configurationFileFormat.MultiplayerMode = MultiplayerMode.Disabled;
+                configurationFileFormat.MultiplayerLanInterfaceId = "0";
+
+                configurationFileUpdated = true;
+            }
+
+            if (configurationFileFormat.Version < 22)
+            {
+                Ryujinx.Common.Logging.Logger.Warning?.Print(LogClass.Application, $"Outdated configuration version {configurationFileFormat.Version}, migrating to version 22.");
+
+                configurationFileFormat.HideCursor = HideCursorMode.Never;
+
+                configurationFileUpdated = true;
+            }
+
+            if (configurationFileFormat.Version < 24)
+            {
+                Ryujinx.Common.Logging.Logger.Warning?.Print(LogClass.Application, $"Outdated configuration version {configurationFileFormat.Version}, migrating to version 24.");
+
+                configurationFileFormat.InputConfig = new List<InputConfig>
+                {
+                    new StandardKeyboardInputConfig
+                    {
+                        Version = InputConfig.CurrentVersion,
+                        Backend = InputBackendType.WindowKeyboard,
+                        Id = "0",
+                        PlayerIndex = PlayerIndex.Player1,
+                        ControllerType = ControllerType.ProController,
+                        LeftJoycon = new LeftJoyconCommonConfig<Key>
+                        {
+                            DpadUp = Key.Up,
+                            DpadDown = Key.Down,
+                            DpadLeft = Key.Left,
+                            DpadRight = Key.Right,
+                            ButtonMinus = Key.Minus,
+                            ButtonL = Key.E,
+                            ButtonZl = Key.Q,
+                            ButtonSl = Key.Unbound,
+                            ButtonSr = Key.Unbound,
+                        },
+                        LeftJoyconStick = new JoyconConfigKeyboardStick<Key>
+                        {
+                            StickUp = Key.W,
+                            StickDown = Key.S,
+                            StickLeft = Key.A,
+                            StickRight = Key.D,
+                            StickButton = Key.F,
+                        },
+                        RightJoycon = new RightJoyconCommonConfig<Key>
+                        {
+                            ButtonA = Key.Z,
+                            ButtonB = Key.X,
+                            ButtonX = Key.C,
+                            ButtonY = Key.V,
+                            ButtonPlus = Key.Plus,
+                            ButtonR = Key.U,
+                            ButtonZr = Key.O,
+                            ButtonSl = Key.Unbound,
+                            ButtonSr = Key.Unbound,
+                        },
+                        RightJoyconStick = new JoyconConfigKeyboardStick<Key>
+                        {
+                            StickUp = Key.I,
+                            StickDown = Key.K,
+                            StickLeft = Key.J,
+                            StickRight = Key.L,
+                            StickButton = Key.H,
+                        },
+                    },
+                };
+
+                configurationFileUpdated = true;
+            }
+
+            if (configurationFileFormat.Version < 25)
+            {
+                Ryujinx.Common.Logging.Logger.Warning?.Print(LogClass.Application, $"Outdated configuration version {configurationFileFormat.Version}, migrating to version 25.");
+
+                configurationFileUpdated = true;
+            }
+
+            if (configurationFileFormat.Version < 26)
+            {
+                Ryujinx.Common.Logging.Logger.Warning?.Print(LogClass.Application, $"Outdated configuration version {configurationFileFormat.Version}, migrating to version 26.");
+
+                configurationFileFormat.MemoryManagerMode = MemoryManagerMode.HostMappedUnsafe;
+
+                configurationFileUpdated = true;
+            }
+
+            if (configurationFileFormat.Version < 27)
+            {
+                Ryujinx.Common.Logging.Logger.Warning?.Print(LogClass.Application, $"Outdated configuration version {configurationFileFormat.Version}, migrating to version 27.");
+
+                configurationFileFormat.EnableMouse = false;
+
+                configurationFileUpdated = true;
+            }
+
+            if (configurationFileFormat.Version < 28)
+            {
+                Ryujinx.Common.Logging.Logger.Warning?.Print(LogClass.Application, $"Outdated configuration version {configurationFileFormat.Version}, migrating to version 28.");
+
+                configurationFileFormat.Hotkeys = new KeyboardHotkeys
+                {
+                    ToggleVsync = Key.F1,
+                    Screenshot = Key.F8,
+                };
+
+                configurationFileUpdated = true;
+            }
+
+            if (configurationFileFormat.Version < 29)
+            {
+                Ryujinx.Common.Logging.Logger.Warning?.Print(LogClass.Application, $"Outdated configuration version {configurationFileFormat.Version}, migrating to version 29.");
+
+                configurationFileFormat.Hotkeys = new KeyboardHotkeys
+                {
+                    ToggleVsync = Key.F1,
+                    Screenshot = Key.F8,
+                    ShowUI = Key.F4,
+                };
+
+                configurationFileUpdated = true;
+            }
+
+            if (configurationFileFormat.Version < 30)
+            {
+                Ryujinx.Common.Logging.Logger.Warning?.Print(LogClass.Application, $"Outdated configuration version {configurationFileFormat.Version}, migrating to version 30.");
+
+                foreach (InputConfig config in configurationFileFormat.InputConfig)
+                {
+                    if (config is StandardControllerInputConfig controllerConfig)
+                    {
+                        controllerConfig.Rumble = new RumbleConfigController
+                        {
+                            EnableRumble = false,
+                            StrongRumble = 1f,
+                            WeakRumble = 1f,
+                        };
+                    }
+                }
+
+                configurationFileUpdated = true;
+            }
+
+            if (configurationFileFormat.Version < 31)
+            {
+                Ryujinx.Common.Logging.Logger.Warning?.Print(LogClass.Application, $"Outdated configuration version {configurationFileFormat.Version}, migrating to version 31.");
+
+                configurationFileFormat.BackendThreading = BackendThreading.Auto;
+
+                configurationFileUpdated = true;
+            }
+
+            if (configurationFileFormat.Version < 32)
+            {
+                Ryujinx.Common.Logging.Logger.Warning?.Print(LogClass.Application, $"Outdated configuration version {configurationFileFormat.Version}, migrating to version 32.");
+
+                configurationFileFormat.Hotkeys = new KeyboardHotkeys
+                {
+                    ToggleVsync = configurationFileFormat.Hotkeys.ToggleVsync,
+                    Screenshot = configurationFileFormat.Hotkeys.Screenshot,
+                    ShowUI = configurationFileFormat.Hotkeys.ShowUI,
+                    Pause = Key.F5,
+                };
+
+                configurationFileUpdated = true;
+            }
+
+            if (configurationFileFormat.Version < 33)
+            {
+                Ryujinx.Common.Logging.Logger.Warning?.Print(LogClass.Application, $"Outdated configuration version {configurationFileFormat.Version}, migrating to version 33.");
+
+                configurationFileFormat.Hotkeys = new KeyboardHotkeys
+                {
+                    ToggleVsync = configurationFileFormat.Hotkeys.ToggleVsync,
+                    Screenshot = configurationFileFormat.Hotkeys.Screenshot,
+                    ShowUI = configurationFileFormat.Hotkeys.ShowUI,
+                    Pause = configurationFileFormat.Hotkeys.Pause,
+                    ToggleMute = Key.F2,
+                };
+
+                configurationFileFormat.AudioVolume = 1;
+
+                configurationFileUpdated = true;
+            }
+
+            if (configurationFileFormat.Version < 34)
+            {
+                Ryujinx.Common.Logging.Logger.Warning?.Print(LogClass.Application, $"Outdated configuration version {configurationFileFormat.Version}, migrating to version 34.");
+
+                configurationFileFormat.EnableInternetAccess = false;
+
+                configurationFileUpdated = true;
+            }
+
+            if (configurationFileFormat.Version < 35)
+            {
+                Ryujinx.Common.Logging.Logger.Warning?.Print(LogClass.Application, $"Outdated configuration version {configurationFileFormat.Version}, migrating to version 35.");
+
+                foreach (InputConfig config in configurationFileFormat.InputConfig)
+                {
+                    if (config is StandardControllerInputConfig controllerConfig)
+                    {
+                        controllerConfig.RangeLeft = 1.0f;
+                        controllerConfig.RangeRight = 1.0f;
+                    }
+                }
+
+                configurationFileUpdated = true;
+            }
+
+            if (configurationFileFormat.Version < 36)
+            {
+                Ryujinx.Common.Logging.Logger.Warning?.Print(LogClass.Application, $"Outdated configuration version {configurationFileFormat.Version}, migrating to version 36.");
+
+                configurationFileFormat.LoggingEnableTrace = false;
+
+                configurationFileUpdated = true;
+            }
+
+            if (configurationFileFormat.Version < 37)
+            {
+                Ryujinx.Common.Logging.Logger.Warning?.Print(LogClass.Application, $"Outdated configuration version {configurationFileFormat.Version}, migrating to version 37.");
+
+                configurationFileFormat.ShowConsole = true;
+
+                configurationFileUpdated = true;
+            }
+
+            if (configurationFileFormat.Version < 38)
+            {
+                Ryujinx.Common.Logging.Logger.Warning?.Print(LogClass.Application, $"Outdated configuration version {configurationFileFormat.Version}, migrating to version 38.");
+
+                configurationFileFormat.BaseStyle = "Dark";
+                configurationFileFormat.GameListViewMode = 0;
+                configurationFileFormat.ShowNames = true;
+                configurationFileFormat.GridSize = 2;
+                configurationFileFormat.LanguageCode = "en_US";
+
+                configurationFileUpdated = true;
+            }
+
+            if (configurationFileFormat.Version < 39)
+            {
+                Ryujinx.Common.Logging.Logger.Warning?.Print(LogClass.Application, $"Outdated configuration version {configurationFileFormat.Version}, migrating to version 39.");
+
+                configurationFileFormat.Hotkeys = new KeyboardHotkeys
+                {
+                    ToggleVsync = configurationFileFormat.Hotkeys.ToggleVsync,
+                    Screenshot = configurationFileFormat.Hotkeys.Screenshot,
+                    ShowUI = configurationFileFormat.Hotkeys.ShowUI,
+                    Pause = configurationFileFormat.Hotkeys.Pause,
+                    ToggleMute = configurationFileFormat.Hotkeys.ToggleMute,
+                    ResScaleUp = Key.Unbound,
+                    ResScaleDown = Key.Unbound,
+                };
+
+                configurationFileUpdated = true;
+            }
+
+            if (configurationFileFormat.Version < 40)
+            {
+                Ryujinx.Common.Logging.Logger.Warning?.Print(LogClass.Application, $"Outdated configuration version {configurationFileFormat.Version}, migrating to version 40.");
+
+                configurationFileFormat.GraphicsBackend = GraphicsBackend.OpenGl;
+
+                configurationFileUpdated = true;
+            }
+
+            if (configurationFileFormat.Version < 41)
+            {
+                Ryujinx.Common.Logging.Logger.Warning?.Print(LogClass.Application, $"Outdated configuration version {configurationFileFormat.Version}, migrating to version 41.");
+
+                configurationFileFormat.Hotkeys = new KeyboardHotkeys
+                {
+                    ToggleVsync = configurationFileFormat.Hotkeys.ToggleVsync,
+                    Screenshot = configurationFileFormat.Hotkeys.Screenshot,
+                    ShowUI = configurationFileFormat.Hotkeys.ShowUI,
+                    Pause = configurationFileFormat.Hotkeys.Pause,
+                    ToggleMute = configurationFileFormat.Hotkeys.ToggleMute,
+                    ResScaleUp = configurationFileFormat.Hotkeys.ResScaleUp,
+                    ResScaleDown = configurationFileFormat.Hotkeys.ResScaleDown,
+                    VolumeUp = Key.Unbound,
+                    VolumeDown = Key.Unbound,
+                };
+            }
+
+            if (configurationFileFormat.Version < 42)
+            {
+                Ryujinx.Common.Logging.Logger.Warning?.Print(LogClass.Application, $"Outdated configuration version {configurationFileFormat.Version}, migrating to version 42.");
+
+                configurationFileFormat.EnableMacroHLE = true;
+            }
+
+            if (configurationFileFormat.Version < 43)
+            {
+                Ryujinx.Common.Logging.Logger.Warning?.Print(LogClass.Application, $"Outdated configuration version {configurationFileFormat.Version}, migrating to version 43.");
+
+                configurationFileFormat.UseHypervisor = true;
+            }
+
+            if (configurationFileFormat.Version < 44)
+            {
+                Ryujinx.Common.Logging.Logger.Warning?.Print(LogClass.Application, $"Outdated configuration version {configurationFileFormat.Version}, migrating to version 44.");
+
+                configurationFileFormat.AntiAliasing = AntiAliasing.None;
+                configurationFileFormat.ScalingFilter = ScalingFilter.Bilinear;
+                configurationFileFormat.ScalingFilterLevel = 80;
+
+                configurationFileUpdated = true;
+            }
+
+            if (configurationFileFormat.Version < 45)
+            {
+                Ryujinx.Common.Logging.Logger.Warning?.Print(LogClass.Application, $"Outdated configuration version {configurationFileFormat.Version}, migrating to version 45.");
+
+                configurationFileFormat.ShownFileTypes = new ShownFileTypes
+                {
+                    NSP = true,
+                    PFS0 = true,
+                    XCI = true,
+                    NCA = true,
+                    NRO = true,
+                    NSO = true,
+                };
+
+                configurationFileUpdated = true;
+            }
+
+            if (configurationFileFormat.Version < 46)
+            {
+                Ryujinx.Common.Logging.Logger.Warning?.Print(LogClass.Application, $"Outdated configuration version {configurationFileFormat.Version}, migrating to version 46.");
+
+                configurationFileFormat.MultiplayerLanInterfaceId = "0";
+
+                configurationFileUpdated = true;
+            }
+
+            if (configurationFileFormat.Version < 47)
+            {
+                Ryujinx.Common.Logging.Logger.Warning?.Print(LogClass.Application, $"Outdated configuration version {configurationFileFormat.Version}, migrating to version 47.");
+
+                configurationFileFormat.WindowStartup = new WindowStartup
+                {
+                    WindowPositionX = 0,
+                    WindowPositionY = 0,
+                    WindowSizeHeight = 760,
+                    WindowSizeWidth = 1280,
+                    WindowMaximized = false,
+                };
+
+                configurationFileUpdated = true;
+            }
+
+            if (configurationFileFormat.Version < 48)
+            {
+                Ryujinx.Common.Logging.Logger.Warning?.Print(LogClass.Application, $"Outdated configuration version {configurationFileFormat.Version}, migrating to version 48.");
+
+                configurationFileFormat.EnableColorSpacePassthrough = false;
+
+                configurationFileUpdated = true;
+            }
+
+            if (configurationFileFormat.Version < 49)
+            {
+                Ryujinx.Common.Logging.Logger.Warning?.Print(LogClass.Application, $"Outdated configuration version {configurationFileFormat.Version}, migrating to version 49.");
+
+                if (OperatingSystem.IsMacOS())
+                {
+                    AppDataManager.FixMacOSConfigurationFolders();
+                }
+
+                configurationFileUpdated = true;
+            }
+
+            if (configurationFileFormat.Version < 50)
+            {
+                Ryujinx.Common.Logging.Logger.Warning?.Print(LogClass.Application, $"Outdated configuration version {configurationFileFormat.Version}, migrating to version 50.");
+
+                configurationFileFormat.EnableHardwareAcceleration = true;
+
+                configurationFileUpdated = true;
+            }
+
+            if (configurationFileFormat.Version < 51)
+            {
+                Ryujinx.Common.Logging.Logger.Warning?.Print(LogClass.Application, $"Outdated configuration version {configurationFileFormat.Version}, migrating to version 51.");
+
+                configurationFileFormat.RememberWindowState = true;
+
+                configurationFileUpdated = true;
+            }
+
+            if (configurationFileFormat.Version < 52)
+            {
+                Ryujinx.Common.Logging.Logger.Warning?.Print(LogClass.Application, $"Outdated configuration version {configurationFileFormat.Version}, migrating to version 52.");
+
+                configurationFileFormat.AutoloadDirs = [];
+
+                configurationFileUpdated = true;
+            }
+
+            if (configurationFileFormat.Version < 53)
+            {
+                Ryujinx.Common.Logging.Logger.Warning?.Print(LogClass.Application, $"Outdated configuration version {configurationFileFormat.Version}, migrating to version 53.");
+
+                configurationFileFormat.EnableLowPowerPtc = false;
+
+                configurationFileUpdated = true;
+            }
+
+            if (configurationFileFormat.Version < 54)
+            {
+                Ryujinx.Common.Logging.Logger.Warning?.Print(LogClass.Application, $"Outdated configuration version {configurationFileFormat.Version}, migrating to version 54.");
+
+                configurationFileFormat.DramSize = MemoryConfiguration.MemoryConfiguration4GiB;
+
+                configurationFileUpdated = true;
+            }
+
+            if (configurationFileFormat.Version < 55)
+            {
+                Ryujinx.Common.Logging.Logger.Warning?.Print(LogClass.Application, $"Outdated configuration version {configurationFileFormat.Version}, migrating to version 55.");
+
+                configurationFileFormat.IgnoreApplet = false;
+
+                configurationFileUpdated = true;
+            }
+
+            if (configurationFileFormat.Version < 56)
+            {
+                Ryujinx.Common.Logging.Logger.Warning?.Print(LogClass.Application, $"Outdated configuration version {configurationFileFormat.Version}, migrating to version 56.");
+
+                configurationFileFormat.ShowTitleBar = !OperatingSystem.IsWindows();
+
+                configurationFileUpdated = true;
+            }
+
+            Logger.EnableFileLog.Value = configurationFileFormat.EnableFileLog;
+            Graphics.ResScale.Value = configurationFileFormat.ResScale;
+            Graphics.ResScaleCustom.Value = configurationFileFormat.ResScaleCustom;
+            Graphics.MaxAnisotropy.Value = configurationFileFormat.MaxAnisotropy;
+            Graphics.AspectRatio.Value = configurationFileFormat.AspectRatio;
+            Graphics.ShadersDumpPath.Value = configurationFileFormat.GraphicsShadersDumpPath;
+            Graphics.BackendThreading.Value = configurationFileFormat.BackendThreading;
+            Graphics.GraphicsBackend.Value = configurationFileFormat.GraphicsBackend;
+            Graphics.PreferredGpu.Value = configurationFileFormat.PreferredGpu;
+            Graphics.AntiAliasing.Value = configurationFileFormat.AntiAliasing;
+            Graphics.ScalingFilter.Value = configurationFileFormat.ScalingFilter;
+            Graphics.ScalingFilterLevel.Value = configurationFileFormat.ScalingFilterLevel;
+            Logger.EnableDebug.Value = configurationFileFormat.LoggingEnableDebug;
+            Logger.EnableStub.Value = configurationFileFormat.LoggingEnableStub;
+            Logger.EnableInfo.Value = configurationFileFormat.LoggingEnableInfo;
+            Logger.EnableWarn.Value = configurationFileFormat.LoggingEnableWarn;
+            Logger.EnableError.Value = configurationFileFormat.LoggingEnableError;
+            Logger.EnableTrace.Value = configurationFileFormat.LoggingEnableTrace;
+            Logger.EnableGuest.Value = configurationFileFormat.LoggingEnableGuest;
+            Logger.EnableFsAccessLog.Value = configurationFileFormat.LoggingEnableFsAccessLog;
+            Logger.FilteredClasses.Value = configurationFileFormat.LoggingFilteredClasses;
+            Logger.GraphicsDebugLevel.Value = configurationFileFormat.LoggingGraphicsDebugLevel;
+            System.Language.Value = configurationFileFormat.SystemLanguage;
+            System.Region.Value = configurationFileFormat.SystemRegion;
+            System.TimeZone.Value = configurationFileFormat.SystemTimeZone;
+            System.SystemTimeOffset.Value = configurationFileFormat.SystemTimeOffset;
+            System.EnableDockedMode.Value = configurationFileFormat.DockedMode;
+            EnableDiscordIntegration.Value = configurationFileFormat.EnableDiscordIntegration;
+            CheckUpdatesOnStart.Value = configurationFileFormat.CheckUpdatesOnStart;
+            ShowConfirmExit.Value = configurationFileFormat.ShowConfirmExit;
+            IgnoreApplet.Value = configurationFileFormat.IgnoreApplet;
+            RememberWindowState.Value = configurationFileFormat.RememberWindowState;
+            ShowTitleBar.Value = configurationFileFormat.ShowTitleBar;
+            EnableHardwareAcceleration.Value = configurationFileFormat.EnableHardwareAcceleration;
+            HideCursor.Value = configurationFileFormat.HideCursor;
+            Graphics.EnableVsync.Value = configurationFileFormat.EnableVsync;
+            Graphics.EnableShaderCache.Value = configurationFileFormat.EnableShaderCache;
+            Graphics.EnableTextureRecompression.Value = configurationFileFormat.EnableTextureRecompression;
+            Graphics.EnableMacroHLE.Value = configurationFileFormat.EnableMacroHLE;
+            Graphics.EnableColorSpacePassthrough.Value = configurationFileFormat.EnableColorSpacePassthrough;
+            System.EnablePtc.Value = configurationFileFormat.EnablePtc;
+            System.EnableLowPowerPtc.Value = configurationFileFormat.EnableLowPowerPtc;
+            System.EnableInternetAccess.Value = configurationFileFormat.EnableInternetAccess;
+            System.EnableFsIntegrityChecks.Value = configurationFileFormat.EnableFsIntegrityChecks;
+            System.FsGlobalAccessLogMode.Value = configurationFileFormat.FsGlobalAccessLogMode;
+            System.AudioBackend.Value = configurationFileFormat.AudioBackend;
+            System.AudioVolume.Value = configurationFileFormat.AudioVolume;
+            System.MemoryManagerMode.Value = configurationFileFormat.MemoryManagerMode;
+            System.DramSize.Value = configurationFileFormat.DramSize;
+            System.IgnoreMissingServices.Value = configurationFileFormat.IgnoreMissingServices;
+            System.UseHypervisor.Value = configurationFileFormat.UseHypervisor;
+            UI.GuiColumns.FavColumn.Value = configurationFileFormat.GuiColumns.FavColumn;
+            UI.GuiColumns.IconColumn.Value = configurationFileFormat.GuiColumns.IconColumn;
+            UI.GuiColumns.AppColumn.Value = configurationFileFormat.GuiColumns.AppColumn;
+            UI.GuiColumns.DevColumn.Value = configurationFileFormat.GuiColumns.DevColumn;
+            UI.GuiColumns.VersionColumn.Value = configurationFileFormat.GuiColumns.VersionColumn;
+            UI.GuiColumns.TimePlayedColumn.Value = configurationFileFormat.GuiColumns.TimePlayedColumn;
+            UI.GuiColumns.LastPlayedColumn.Value = configurationFileFormat.GuiColumns.LastPlayedColumn;
+            UI.GuiColumns.FileExtColumn.Value = configurationFileFormat.GuiColumns.FileExtColumn;
+            UI.GuiColumns.FileSizeColumn.Value = configurationFileFormat.GuiColumns.FileSizeColumn;
+            UI.GuiColumns.PathColumn.Value = configurationFileFormat.GuiColumns.PathColumn;
+            UI.ColumnSort.SortColumnId.Value = configurationFileFormat.ColumnSort.SortColumnId;
+            UI.ColumnSort.SortAscending.Value = configurationFileFormat.ColumnSort.SortAscending;
+            UI.GameDirs.Value = configurationFileFormat.GameDirs;
+            UI.AutoloadDirs.Value = configurationFileFormat.AutoloadDirs ?? [];
+            UI.ShownFileTypes.NSP.Value = configurationFileFormat.ShownFileTypes.NSP;
+            UI.ShownFileTypes.PFS0.Value = configurationFileFormat.ShownFileTypes.PFS0;
+            UI.ShownFileTypes.XCI.Value = configurationFileFormat.ShownFileTypes.XCI;
+            UI.ShownFileTypes.NCA.Value = configurationFileFormat.ShownFileTypes.NCA;
+            UI.ShownFileTypes.NRO.Value = configurationFileFormat.ShownFileTypes.NRO;
+            UI.ShownFileTypes.NSO.Value = configurationFileFormat.ShownFileTypes.NSO;
+            UI.LanguageCode.Value = configurationFileFormat.LanguageCode;
+            UI.BaseStyle.Value = configurationFileFormat.BaseStyle;
+            UI.GameListViewMode.Value = configurationFileFormat.GameListViewMode;
+            UI.ShowNames.Value = configurationFileFormat.ShowNames;
+            UI.IsAscendingOrder.Value = configurationFileFormat.IsAscendingOrder;
+            UI.GridSize.Value = configurationFileFormat.GridSize;
+            UI.ApplicationSort.Value = configurationFileFormat.ApplicationSort;
+            UI.StartFullscreen.Value = configurationFileFormat.StartFullscreen;
+            UI.ShowConsole.Value = configurationFileFormat.ShowConsole;
+            UI.WindowStartup.WindowSizeWidth.Value = configurationFileFormat.WindowStartup.WindowSizeWidth;
+            UI.WindowStartup.WindowSizeHeight.Value = configurationFileFormat.WindowStartup.WindowSizeHeight;
+            UI.WindowStartup.WindowPositionX.Value = configurationFileFormat.WindowStartup.WindowPositionX;
+            UI.WindowStartup.WindowPositionY.Value = configurationFileFormat.WindowStartup.WindowPositionY;
+            UI.WindowStartup.WindowMaximized.Value = configurationFileFormat.WindowStartup.WindowMaximized;
+            Hid.EnableKeyboard.Value = configurationFileFormat.EnableKeyboard;
+            Hid.EnableMouse.Value = configurationFileFormat.EnableMouse;
+            Hid.Hotkeys.Value = configurationFileFormat.Hotkeys;
+            Hid.InputConfig.Value = configurationFileFormat.InputConfig ?? [];
+
+            Multiplayer.LanInterfaceId.Value = configurationFileFormat.MultiplayerLanInterfaceId;
+            Multiplayer.Mode.Value = configurationFileFormat.MultiplayerMode;
+            Multiplayer.DisableP2p.Value = configurationFileFormat.MultiplayerDisableP2p;
+            Multiplayer.LdnPassphrase.Value = configurationFileFormat.MultiplayerLdnPassphrase;
+            Multiplayer.LdnServer.Value = configurationFileFormat.LdnServer;
+
+            if (configurationFileUpdated)
+            {
+                ToFileFormat().SaveConfig(configurationFilePath);
+
+                Ryujinx.Common.Logging.Logger.Notice.Print(LogClass.Application, $"Configuration file updated to version {ConfigurationFileFormat.CurrentVersion}");
+            }
+        }
+    }
+}

src/Ryujinx.UI.Common/Configuration/ConfigurationState.Model.cs

@@ -0,0 +1,700 @@
+using ARMeilleure;
+using Ryujinx.Common;
+using Ryujinx.Common.Configuration;
+using Ryujinx.Common.Configuration.Hid;
+using Ryujinx.Common.Configuration.Multiplayer;
+using Ryujinx.Common.Logging;
+using Ryujinx.HLE;
+using Ryujinx.UI.Common.Configuration.System;
+using Ryujinx.UI.Common.Helper;
+using System.Collections.Generic;
+
+namespace Ryujinx.UI.Common.Configuration
+{
+    public partial class ConfigurationState
+    {
+                /// <summary>
+        /// UI configuration section
+        /// </summary>
+        public class UISection
+        {
+            public class Columns
+            {
+                public ReactiveObject<bool> FavColumn { get; private set; }
+                public ReactiveObject<bool> IconColumn { get; private set; }
+                public ReactiveObject<bool> AppColumn { get; private set; }
+                public ReactiveObject<bool> DevColumn { get; private set; }
+                public ReactiveObject<bool> VersionColumn { get; private set; }
+                public ReactiveObject<bool> LdnInfoColumn { get; private set; }
+                public ReactiveObject<bool> TimePlayedColumn { get; private set; }
+                public ReactiveObject<bool> LastPlayedColumn { get; private set; }
+                public ReactiveObject<bool> FileExtColumn { get; private set; }
+                public ReactiveObject<bool> FileSizeColumn { get; private set; }
+                public ReactiveObject<bool> PathColumn { get; private set; }
+
+                public Columns()
+                {
+                    FavColumn = new ReactiveObject<bool>();
+                    IconColumn = new ReactiveObject<bool>();
+                    AppColumn = new ReactiveObject<bool>();
+                    DevColumn = new ReactiveObject<bool>();
+                    VersionColumn = new ReactiveObject<bool>();
+                    LdnInfoColumn = new ReactiveObject<bool>();
+                    TimePlayedColumn = new ReactiveObject<bool>();
+                    LastPlayedColumn = new ReactiveObject<bool>();
+                    FileExtColumn = new ReactiveObject<bool>();
+                    FileSizeColumn = new ReactiveObject<bool>();
+                    PathColumn = new ReactiveObject<bool>();
+                }
+            }
+
+            public class ColumnSortSettings
+            {
+                public ReactiveObject<int> SortColumnId { get; private set; }
+                public ReactiveObject<bool> SortAscending { get; private set; }
+
+                public ColumnSortSettings()
+                {
+                    SortColumnId = new ReactiveObject<int>();
+                    SortAscending = new ReactiveObject<bool>();
+                }
+            }
+
+            /// <summary>
+            /// Used to toggle which file types are shown in the UI
+            /// </summary>
+            public class ShownFileTypeSettings
+            {
+                public ReactiveObject<bool> NSP { get; private set; }
+                public ReactiveObject<bool> PFS0 { get; private set; }
+                public ReactiveObject<bool> XCI { get; private set; }
+                public ReactiveObject<bool> NCA { get; private set; }
+                public ReactiveObject<bool> NRO { get; private set; }
+                public ReactiveObject<bool> NSO { get; private set; }
+
+                public ShownFileTypeSettings()
+                {
+                    NSP = new ReactiveObject<bool>();
+                    PFS0 = new ReactiveObject<bool>();
+                    XCI = new ReactiveObject<bool>();
+                    NCA = new ReactiveObject<bool>();
+                    NRO = new ReactiveObject<bool>();
+                    NSO = new ReactiveObject<bool>();
+                }
+            }
+
+            // <summary>
+            /// Determines main window start-up position, size and state
+            ///<summary>
+            public class WindowStartupSettings
+            {
+                public ReactiveObject<int> WindowSizeWidth { get; private set; }
+                public ReactiveObject<int> WindowSizeHeight { get; private set; }
+                public ReactiveObject<int> WindowPositionX { get; private set; }
+                public ReactiveObject<int> WindowPositionY { get; private set; }
+                public ReactiveObject<bool> WindowMaximized { get; private set; }
+
+                public WindowStartupSettings()
+                {
+                    WindowSizeWidth = new ReactiveObject<int>();
+                    WindowSizeHeight = new ReactiveObject<int>();
+                    WindowPositionX = new ReactiveObject<int>();
+                    WindowPositionY = new ReactiveObject<int>();
+                    WindowMaximized = new ReactiveObject<bool>();
+                }
+            }
+
+            /// <summary>
+            /// Used to toggle columns in the GUI
+            /// </summary>
+            public Columns GuiColumns { get; private set; }
+
+            /// <summary>
+            /// Used to configure column sort settings in the GUI
+            /// </summary>
+            public ColumnSortSettings ColumnSort { get; private set; }
+
+            /// <summary>
+            /// A list of directories containing games to be used to load games into the games list
+            /// </summary>
+            public ReactiveObject<List<string>> GameDirs { get; private set; }
+
+            /// <summary>
+            /// A list of directories containing DLC/updates the user wants to autoload during library refreshes
+            /// </summary>
+            public ReactiveObject<List<string>> AutoloadDirs { get; private set; }
+
+            /// <summary>
+            /// A list of file types to be hidden in the games List
+            /// </summary>
+            public ShownFileTypeSettings ShownFileTypes { get; private set; }
+
+            /// <summary>
+            /// Determines main window start-up position, size and state
+            /// </summary>
+            public WindowStartupSettings WindowStartup { get; private set; }
+
+            /// <summary>
+            /// Language Code for the UI
+            /// </summary>
+            public ReactiveObject<string> LanguageCode { get; private set; }
+
+            /// <summary>
+            /// Selects the base style
+            /// </summary>
+            public ReactiveObject<string> BaseStyle { get; private set; }
+
+            /// <summary>
+            /// Start games in fullscreen mode
+            /// </summary>
+            public ReactiveObject<bool> StartFullscreen { get; private set; }
+
+            /// <summary>
+            /// Hide / Show Console Window
+            /// </summary>
+            public ReactiveObject<bool> ShowConsole { get; private set; }
+
+            /// <summary>
+            /// View Mode of the Game list
+            /// </summary>
+            public ReactiveObject<int> GameListViewMode { get; private set; }
+
+            /// <summary>
+            /// Show application name in Grid Mode
+            /// </summary>
+            public ReactiveObject<bool> ShowNames { get; private set; }
+
+            /// <summary>
+            /// Sets App Icon Size in Grid Mode
+            /// </summary>
+            public ReactiveObject<int> GridSize { get; private set; }
+
+            /// <summary>
+            /// Sorts Apps in Grid Mode
+            /// </summary>
+            public ReactiveObject<int> ApplicationSort { get; private set; }
+
+            /// <summary>
+            /// Sets if Grid is ordered in Ascending Order
+            /// </summary>
+            public ReactiveObject<bool> IsAscendingOrder { get; private set; }
+
+            public UISection()
+            {
+                GuiColumns = new Columns();
+                ColumnSort = new ColumnSortSettings();
+                GameDirs = new ReactiveObject<List<string>>();
+                AutoloadDirs = new ReactiveObject<List<string>>();
+                ShownFileTypes = new ShownFileTypeSettings();
+                WindowStartup = new WindowStartupSettings();
+                BaseStyle = new ReactiveObject<string>();
+                StartFullscreen = new ReactiveObject<bool>();
+                GameListViewMode = new ReactiveObject<int>();
+                ShowNames = new ReactiveObject<bool>();
+                GridSize = new ReactiveObject<int>();
+                ApplicationSort = new ReactiveObject<int>();
+                IsAscendingOrder = new ReactiveObject<bool>();
+                LanguageCode = new ReactiveObject<string>();
+                ShowConsole = new ReactiveObject<bool>();
+                ShowConsole.Event += static (_, e) => ConsoleHelper.SetConsoleWindowState(e.NewValue);
+            }
+        }
+
+        /// <summary>
+        /// Logger configuration section
+        /// </summary>
+        public class LoggerSection
+        {
+            /// <summary>
+            /// Enables printing debug log messages
+            /// </summary>
+            public ReactiveObject<bool> EnableDebug { get; private set; }
+
+            /// <summary>
+            /// Enables printing stub log messages
+            /// </summary>
+            public ReactiveObject<bool> EnableStub { get; private set; }
+
+            /// <summary>
+            /// Enables printing info log messages
+            /// </summary>
+            public ReactiveObject<bool> EnableInfo { get; private set; }
+
+            /// <summary>
+            /// Enables printing warning log messages
+            /// </summary>
+            public ReactiveObject<bool> EnableWarn { get; private set; }
+
+            /// <summary>
+            /// Enables printing error log messages
+            /// </summary>
+            public ReactiveObject<bool> EnableError { get; private set; }
+
+            /// <summary>
+            /// Enables printing trace log messages
+            /// </summary>
+            public ReactiveObject<bool> EnableTrace { get; private set; }
+
+            /// <summary>
+            /// Enables printing guest log messages
+            /// </summary>
+            public ReactiveObject<bool> EnableGuest { get; private set; }
+
+            /// <summary>
+            /// Enables printing FS access log messages
+            /// </summary>
+            public ReactiveObject<bool> EnableFsAccessLog { get; private set; }
+
+            /// <summary>
+            /// Controls which log messages are written to the log targets
+            /// </summary>
+            public ReactiveObject<LogClass[]> FilteredClasses { get; private set; }
+
+            /// <summary>
+            /// Enables or disables logging to a file on disk
+            /// </summary>
+            public ReactiveObject<bool> EnableFileLog { get; private set; }
+
+            /// <summary>
+            /// Controls which OpenGL log messages are recorded in the log
+            /// </summary>
+            public ReactiveObject<GraphicsDebugLevel> GraphicsDebugLevel { get; private set; }
+
+            public LoggerSection()
+            {
+                EnableDebug = new ReactiveObject<bool>();
+                EnableDebug.LogChangesToValue(nameof(EnableDebug));
+                EnableStub = new ReactiveObject<bool>();
+                EnableInfo = new ReactiveObject<bool>();
+                EnableWarn = new ReactiveObject<bool>();
+                EnableError = new ReactiveObject<bool>();
+                EnableTrace = new ReactiveObject<bool>();
+                EnableGuest = new ReactiveObject<bool>();
+                EnableFsAccessLog = new ReactiveObject<bool>();
+                FilteredClasses = new ReactiveObject<LogClass[]>();
+                EnableFileLog = new ReactiveObject<bool>();
+                EnableFileLog.LogChangesToValue(nameof(EnableFileLog));
+                GraphicsDebugLevel = new ReactiveObject<GraphicsDebugLevel>();
+            }
+        }
+
+        /// <summary>
+        /// System configuration section
+        /// </summary>
+        public class SystemSection
+        {
+            /// <summary>
+            /// Change System Language
+            /// </summary>
+            public ReactiveObject<Language> Language { get; private set; }
+
+            /// <summary>
+            /// Change System Region
+            /// </summary>
+            public ReactiveObject<Region> Region { get; private set; }
+
+            /// <summary>
+            /// Change System TimeZone
+            /// </summary>
+            public ReactiveObject<string> TimeZone { get; private set; }
+
+            /// <summary>
+            /// System Time Offset in Seconds
+            /// </summary>
+            public ReactiveObject<long> SystemTimeOffset { get; private set; }
+
+            /// <summary>
+            /// Enables or disables Docked Mode
+            /// </summary>
+            public ReactiveObject<bool> EnableDockedMode { get; private set; }
+
+            /// <summary>
+            /// Enables or disables persistent profiled translation cache
+            /// </summary>
+            public ReactiveObject<bool> EnablePtc { get; private set; }
+
+            /// <summary>
+            /// Enables or disables low-power persistent profiled translation cache loading
+            /// </summary>
+            public ReactiveObject<bool> EnableLowPowerPtc { get; private set; }
+
+            /// <summary>
+            /// Enables or disables guest Internet access
+            /// </summary>
+            public ReactiveObject<bool> EnableInternetAccess { get; private set; }
+
+            /// <summary>
+            /// Enables integrity checks on Game content files
+            /// </summary>
+            public ReactiveObject<bool> EnableFsIntegrityChecks { get; private set; }
+
+            /// <summary>
+            /// Enables FS access log output to the console. Possible modes are 0-3
+            /// </summary>
+            public ReactiveObject<int> FsGlobalAccessLogMode { get; private set; }
+
+            /// <summary>
+            /// The selected audio backend
+            /// </summary>
+            public ReactiveObject<AudioBackend> AudioBackend { get; private set; }
+
+            /// <summary>
+            /// The audio backend volume
+            /// </summary>
+            public ReactiveObject<float> AudioVolume { get; private set; }
+
+            /// <summary>
+            /// The selected memory manager mode
+            /// </summary>
+            public ReactiveObject<MemoryManagerMode> MemoryManagerMode { get; private set; }
+
+            /// <summary>
+            /// Defines the amount of RAM available on the emulated system, and how it is distributed
+            /// </summary>
+            public ReactiveObject<MemoryConfiguration> DramSize { get; private set; }
+
+            /// <summary>
+            /// Enable or disable ignoring missing services
+            /// </summary>
+            public ReactiveObject<bool> IgnoreMissingServices { get; private set; }
+
+            /// <summary>
+            /// Uses Hypervisor over JIT if available
+            /// </summary>
+            public ReactiveObject<bool> UseHypervisor { get; private set; }
+
+            public SystemSection()
+            {
+                Language = new ReactiveObject<Language>();
+                Language.LogChangesToValue(nameof(Language));
+                Region = new ReactiveObject<Region>();
+                Region.LogChangesToValue(nameof(Region));
+                TimeZone = new ReactiveObject<string>();
+                TimeZone.LogChangesToValue(nameof(TimeZone));
+                SystemTimeOffset = new ReactiveObject<long>();
+                SystemTimeOffset.LogChangesToValue(nameof(SystemTimeOffset));
+                EnableDockedMode = new ReactiveObject<bool>();
+                EnableDockedMode.LogChangesToValue(nameof(EnableDockedMode));
+                EnablePtc = new ReactiveObject<bool>();
+                EnablePtc.LogChangesToValue(nameof(EnablePtc));
+                EnableLowPowerPtc = new ReactiveObject<bool>();
+                EnableLowPowerPtc.LogChangesToValue(nameof(EnableLowPowerPtc));
+                EnableLowPowerPtc.Event += (_, evnt) 
+                    => Optimizations.LowPower = evnt.NewValue;
+                EnableInternetAccess = new ReactiveObject<bool>();
+                EnableInternetAccess.LogChangesToValue(nameof(EnableInternetAccess));
+                EnableFsIntegrityChecks = new ReactiveObject<bool>();
+                EnableFsIntegrityChecks.LogChangesToValue(nameof(EnableFsIntegrityChecks));
+                FsGlobalAccessLogMode = new ReactiveObject<int>();
+                FsGlobalAccessLogMode.LogChangesToValue(nameof(FsGlobalAccessLogMode));
+                AudioBackend = new ReactiveObject<AudioBackend>();
+                AudioBackend.LogChangesToValue(nameof(AudioBackend));
+                MemoryManagerMode = new ReactiveObject<MemoryManagerMode>();
+                MemoryManagerMode.LogChangesToValue(nameof(MemoryManagerMode));
+                DramSize = new ReactiveObject<MemoryConfiguration>();
+                DramSize.LogChangesToValue(nameof(DramSize));
+                IgnoreMissingServices = new ReactiveObject<bool>();
+                IgnoreMissingServices.LogChangesToValue(nameof(IgnoreMissingServices));
+                AudioVolume = new ReactiveObject<float>();
+                AudioVolume.LogChangesToValue(nameof(AudioVolume));
+                UseHypervisor = new ReactiveObject<bool>();
+                UseHypervisor.LogChangesToValue(nameof(UseHypervisor));
+            }
+        }
+
+        /// <summary>
+        /// Hid configuration section
+        /// </summary>
+        public class HidSection
+        {
+            /// <summary>
+            /// Enable or disable keyboard support (Independent from controllers binding)
+            /// </summary>
+            public ReactiveObject<bool> EnableKeyboard { get; private set; }
+
+            /// <summary>
+            /// Enable or disable mouse support (Independent from controllers binding)
+            /// </summary>
+            public ReactiveObject<bool> EnableMouse { get; private set; }
+
+            /// <summary>
+            /// Hotkey Keyboard Bindings
+            /// </summary>
+            public ReactiveObject<KeyboardHotkeys> Hotkeys { get; private set; }
+
+            /// <summary>
+            /// Input device configuration.
+            /// NOTE: This ReactiveObject won't issue an event when the List has elements added or removed.
+            /// TODO: Implement a ReactiveList class.
+            /// </summary>
+            public ReactiveObject<List<InputConfig>> InputConfig { get; private set; }
+
+            public HidSection()
+            {
+                EnableKeyboard = new ReactiveObject<bool>();
+                EnableMouse = new ReactiveObject<bool>();
+                Hotkeys = new ReactiveObject<KeyboardHotkeys>();
+                InputConfig = new ReactiveObject<List<InputConfig>>();
+            }
+        }
+
+        /// <summary>
+        /// Graphics configuration section
+        /// </summary>
+        public class GraphicsSection
+        {
+            /// <summary>
+            /// Whether or not backend threading is enabled. The "Auto" setting will determine whether threading should be enabled at runtime.
+            /// </summary>
+            public ReactiveObject<BackendThreading> BackendThreading { get; private set; }
+
+            /// <summary>
+            /// Max Anisotropy. Values range from 0 - 16. Set to -1 to let the game decide.
+            /// </summary>
+            public ReactiveObject<float> MaxAnisotropy { get; private set; }
+
+            /// <summary>
+            /// Aspect Ratio applied to the renderer window.
+            /// </summary>
+            public ReactiveObject<AspectRatio> AspectRatio { get; private set; }
+
+            /// <summary>
+            /// Resolution Scale. An integer scale applied to applicable render targets. Values 1-4, or -1 to use a custom floating point scale instead.
+            /// </summary>
+            public ReactiveObject<int> ResScale { get; private set; }
+
+            /// <summary>
+            /// Custom Resolution Scale. A custom floating point scale applied to applicable render targets. Only active when Resolution Scale is -1.
+            /// </summary>
+            public ReactiveObject<float> ResScaleCustom { get; private set; }
+
+            /// <summary>
+            /// Dumps shaders in this local directory
+            /// </summary>
+            public ReactiveObject<string> ShadersDumpPath { get; private set; }
+
+            /// <summary>
+            /// Enables or disables Vertical Sync
+            /// </summary>
+            public ReactiveObject<bool> EnableVsync { get; private set; }
+
+            /// <summary>
+            /// Enables or disables Shader cache
+            /// </summary>
+            public ReactiveObject<bool> EnableShaderCache { get; private set; }
+
+            /// <summary>
+            /// Enables or disables texture recompression
+            /// </summary>
+            public ReactiveObject<bool> EnableTextureRecompression { get; private set; }
+
+            /// <summary>
+            /// Enables or disables Macro high-level emulation
+            /// </summary>
+            public ReactiveObject<bool> EnableMacroHLE { get; private set; }
+
+            /// <summary>
+            /// Enables or disables color space passthrough, if available.
+            /// </summary>
+            public ReactiveObject<bool> EnableColorSpacePassthrough { get; private set; }
+
+            /// <summary>
+            /// Graphics backend
+            /// </summary>
+            public ReactiveObject<GraphicsBackend> GraphicsBackend { get; private set; }
+
+            /// <summary>
+            /// Applies anti-aliasing to the renderer.
+            /// </summary>
+            public ReactiveObject<AntiAliasing> AntiAliasing { get; private set; }
+
+            /// <summary>
+            /// Sets the framebuffer upscaling type.
+            /// </summary>
+            public ReactiveObject<ScalingFilter> ScalingFilter { get; private set; }
+
+            /// <summary>
+            /// Sets the framebuffer upscaling level.
+            /// </summary>
+            public ReactiveObject<int> ScalingFilterLevel { get; private set; }
+
+            /// <summary>
+            /// Preferred GPU
+            /// </summary>
+            public ReactiveObject<string> PreferredGpu { get; private set; }
+
+            public GraphicsSection()
+            {
+                BackendThreading = new ReactiveObject<BackendThreading>();
+                BackendThreading.LogChangesToValue(nameof(BackendThreading));
+                ResScale = new ReactiveObject<int>();
+                ResScale.LogChangesToValue(nameof(ResScale));
+                ResScaleCustom = new ReactiveObject<float>();
+                ResScaleCustom.LogChangesToValue(nameof(ResScaleCustom));
+                MaxAnisotropy = new ReactiveObject<float>();
+                MaxAnisotropy.LogChangesToValue(nameof(MaxAnisotropy));
+                AspectRatio = new ReactiveObject<AspectRatio>();
+                AspectRatio.LogChangesToValue(nameof(AspectRatio));
+                ShadersDumpPath = new ReactiveObject<string>();
+                EnableVsync = new ReactiveObject<bool>();
+                EnableVsync.LogChangesToValue(nameof(EnableVsync));
+                EnableShaderCache = new ReactiveObject<bool>();
+                EnableShaderCache.LogChangesToValue(nameof(EnableShaderCache));
+                EnableTextureRecompression = new ReactiveObject<bool>();
+                EnableTextureRecompression.LogChangesToValue(nameof(EnableTextureRecompression));
+                GraphicsBackend = new ReactiveObject<GraphicsBackend>();
+                GraphicsBackend.LogChangesToValue(nameof(GraphicsBackend));
+                PreferredGpu = new ReactiveObject<string>();
+                PreferredGpu.LogChangesToValue(nameof(PreferredGpu));
+                EnableMacroHLE = new ReactiveObject<bool>();
+                EnableMacroHLE.LogChangesToValue(nameof(EnableMacroHLE));
+                EnableColorSpacePassthrough = new ReactiveObject<bool>();
+                EnableColorSpacePassthrough.LogChangesToValue(nameof(EnableColorSpacePassthrough));
+                AntiAliasing = new ReactiveObject<AntiAliasing>();
+                AntiAliasing.LogChangesToValue(nameof(AntiAliasing));
+                ScalingFilter = new ReactiveObject<ScalingFilter>();
+                ScalingFilter.LogChangesToValue(nameof(ScalingFilter));
+                ScalingFilterLevel = new ReactiveObject<int>();
+                ScalingFilterLevel.LogChangesToValue(nameof(ScalingFilterLevel));
+            }
+        }
+
+        /// <summary>
+        /// Multiplayer configuration section
+        /// </summary>
+        public class MultiplayerSection
+        {
+            /// <summary>
+            /// GUID for the network interface used by LAN (or 0 for default)
+            /// </summary>
+            public ReactiveObject<string> LanInterfaceId { get; private set; }
+
+            /// <summary>
+            /// Multiplayer Mode
+            /// </summary>
+            public ReactiveObject<MultiplayerMode> Mode { get; private set; }
+
+            /// <summary>
+            /// Disable P2P
+            /// </summary>
+            public ReactiveObject<bool> DisableP2p { get; private set; }
+
+            /// <summary>
+            /// LDN PassPhrase
+            /// </summary>
+            public ReactiveObject<string> LdnPassphrase { get; private set; }
+
+            /// <summary>
+            /// LDN Server
+            /// </summary>
+            public ReactiveObject<string> LdnServer { get; private set; }
+
+            public MultiplayerSection()
+            {
+                LanInterfaceId = new ReactiveObject<string>();
+                Mode = new ReactiveObject<MultiplayerMode>();
+                Mode.LogChangesToValue(nameof(MultiplayerMode));
+                DisableP2p = new ReactiveObject<bool>();
+                DisableP2p.LogChangesToValue(nameof(DisableP2p));
+                LdnPassphrase = new ReactiveObject<string>();
+                LdnPassphrase.LogChangesToValue(nameof(LdnPassphrase));
+                LdnServer = new ReactiveObject<string>();
+                LdnServer.LogChangesToValue(nameof(LdnServer));
+            }
+        }
+
+        /// <summary>
+        /// The default configuration instance
+        /// </summary>
+        public static ConfigurationState Instance { get; private set; }
+
+        /// <summary>
+        /// The UI section
+        /// </summary>
+        public UISection UI { get; private set; }
+
+        /// <summary>
+        /// The Logger section
+        /// </summary>
+        public LoggerSection Logger { get; private set; }
+
+        /// <summary>
+        /// The System section
+        /// </summary>
+        public SystemSection System { get; private set; }
+
+        /// <summary>
+        /// The Graphics section
+        /// </summary>
+        public GraphicsSection Graphics { get; private set; }
+
+        /// <summary>
+        /// The Hid section
+        /// </summary>
+        public HidSection Hid { get; private set; }
+
+        /// <summary>
+        /// The Multiplayer section
+        /// </summary>
+        public MultiplayerSection Multiplayer { get; private set; }
+
+        /// <summary>
+        /// Enables or disables Discord Rich Presence
+        /// </summary>
+        public ReactiveObject<bool> EnableDiscordIntegration { get; private set; }
+
+        /// <summary>
+        /// Checks for updates when Ryujinx starts when enabled
+        /// </summary>
+        public ReactiveObject<bool> CheckUpdatesOnStart { get; private set; }
+
+        /// <summary>
+        /// Show "Confirm Exit" Dialog
+        /// </summary>
+        public ReactiveObject<bool> ShowConfirmExit { get; private set; }
+
+        /// <summary>
+        /// Ignore Applet
+        /// </summary>
+        public ReactiveObject<bool> IgnoreApplet { get; private set; }
+
+        /// <summary>
+        /// Enables or disables save window size, position and state on close.
+        /// </summary>
+        public ReactiveObject<bool> RememberWindowState { get; private set; }
+
+        /// <summary>
+        /// Enables or disables the redesigned title bar
+        /// </summary>
+        public ReactiveObject<bool> ShowTitleBar { get; private set; }
+
+        /// <summary>
+        /// Enables hardware-accelerated rendering for Avalonia
+        /// </summary>
+        public ReactiveObject<bool> EnableHardwareAcceleration { get; private set; }
+
+        /// <summary>
+        /// Hide Cursor on Idle
+        /// </summary>
+        public ReactiveObject<HideCursorMode> HideCursor { get; private set; }
+
+        private ConfigurationState()
+        {
+            UI = new UISection();
+            Logger = new LoggerSection();
+            System = new SystemSection();
+            Graphics = new GraphicsSection();
+            Hid = new HidSection();
+            Multiplayer = new MultiplayerSection();
+            EnableDiscordIntegration = new ReactiveObject<bool>();
+            CheckUpdatesOnStart = new ReactiveObject<bool>();
+            ShowConfirmExit = new ReactiveObject<bool>();
+            IgnoreApplet = new ReactiveObject<bool>();
+            IgnoreApplet.LogChangesToValue(nameof(IgnoreApplet));
+            RememberWindowState = new ReactiveObject<bool>();
+            ShowTitleBar = new ReactiveObject<bool>();
+            EnableHardwareAcceleration = new ReactiveObject<bool>();
+            HideCursor = new ReactiveObject<HideCursorMode>();
+        }
+    }
+}

src/Ryujinx.UI.Common/Configuration/LoggerModule.cs

@@ -1,4 +1,3 @@
-using Ryujinx.Common;
 using Ryujinx.Common.Configuration;
 using Ryujinx.Common.Logging;
 using Ryujinx.Common.Logging.Targets;
@@ -11,103 +10,69 @@ namespace Ryujinx.UI.Common.Configuration
     {
         public static void Initialize()
         {
-            ConfigurationState.Instance.Logger.EnableDebug.Event += ReloadEnableDebug;
-            ConfigurationState.Instance.Logger.EnableStub.Event += ReloadEnableStub;
-            ConfigurationState.Instance.Logger.EnableInfo.Event += ReloadEnableInfo;
-            ConfigurationState.Instance.Logger.EnableWarn.Event += ReloadEnableWarning;
-            ConfigurationState.Instance.Logger.EnableError.Event += ReloadEnableError;
-            ConfigurationState.Instance.Logger.EnableTrace.Event += ReloadEnableTrace;
-            ConfigurationState.Instance.Logger.EnableGuest.Event += ReloadEnableGuest;
-            ConfigurationState.Instance.Logger.EnableFsAccessLog.Event += ReloadEnableFsAccessLog;
-            ConfigurationState.Instance.Logger.FilteredClasses.Event += ReloadFilteredClasses;
-            ConfigurationState.Instance.Logger.EnableFileLog.Event += ReloadFileLogger;
-        }
-
-        private static void ReloadEnableDebug(object sender, ReactiveEventArgs<bool> e)
-        {
-            Logger.SetEnable(LogLevel.Debug, e.NewValue);
-        }
-
-        private static void ReloadEnableStub(object sender, ReactiveEventArgs<bool> e)
-        {
-            Logger.SetEnable(LogLevel.Stub, e.NewValue);
-        }
-
-        private static void ReloadEnableInfo(object sender, ReactiveEventArgs<bool> e)
-        {
-            Logger.SetEnable(LogLevel.Info, e.NewValue);
-        }
-
-        private static void ReloadEnableWarning(object sender, ReactiveEventArgs<bool> e)
-        {
-            Logger.SetEnable(LogLevel.Warning, e.NewValue);
-        }
-
-        private static void ReloadEnableError(object sender, ReactiveEventArgs<bool> e)
-        {
-            Logger.SetEnable(LogLevel.Error, e.NewValue);
-        }
-
-        private static void ReloadEnableTrace(object sender, ReactiveEventArgs<bool> e)
-        {
-            Logger.SetEnable(LogLevel.Trace, e.NewValue);
-        }
-
-        private static void ReloadEnableGuest(object sender, ReactiveEventArgs<bool> e)
-        {
-            Logger.SetEnable(LogLevel.Guest, e.NewValue);
-        }
-
-        private static void ReloadEnableFsAccessLog(object sender, ReactiveEventArgs<bool> e)
-        {
-            Logger.SetEnable(LogLevel.AccessLog, e.NewValue);
-        }
-
-        private static void ReloadFilteredClasses(object sender, ReactiveEventArgs<LogClass[]> e)
-        {
-            bool noFilter = e.NewValue.Length == 0;
-
-            foreach (var logClass in Enum.GetValues<LogClass>())
+            ConfigurationState.Instance.Logger.EnableDebug.Event += 
+                (_, e) => Logger.SetEnable(LogLevel.Debug, e.NewValue);
+            ConfigurationState.Instance.Logger.EnableStub.Event += 
+                (_, e) => Logger.SetEnable(LogLevel.Stub, e.NewValue);
+            ConfigurationState.Instance.Logger.EnableInfo.Event += 
+                (_, e) => Logger.SetEnable(LogLevel.Info, e.NewValue);
+            ConfigurationState.Instance.Logger.EnableWarn.Event += 
+                (_, e) => Logger.SetEnable(LogLevel.Warning, e.NewValue);
+            ConfigurationState.Instance.Logger.EnableError.Event += 
+                (_, e) => Logger.SetEnable(LogLevel.Error, e.NewValue);
+            ConfigurationState.Instance.Logger.EnableTrace.Event += 
+                (_, e) => Logger.SetEnable(LogLevel.Trace, e.NewValue);
+            ConfigurationState.Instance.Logger.EnableGuest.Event += 
+                (_, e) => Logger.SetEnable(LogLevel.Guest, e.NewValue);
+            ConfigurationState.Instance.Logger.EnableFsAccessLog.Event +=
+                (_, e) => Logger.SetEnable(LogLevel.AccessLog, e.NewValue);
+            
+            ConfigurationState.Instance.Logger.FilteredClasses.Event += (_, e) =>
             {
-                Logger.SetEnable(logClass, noFilter);
-            }
+                bool noFilter = e.NewValue.Length == 0;
 
-            foreach (var logClass in e.NewValue)
-            {
-                Logger.SetEnable(logClass, true);
-            }
-        }
-
-        private static void ReloadFileLogger(object sender, ReactiveEventArgs<bool> e)
-        {
-            if (e.NewValue)
-            {
-                string logDir = AppDataManager.LogsDirPath;
-                FileStream logFile = null;
-
-                if (!string.IsNullOrEmpty(logDir))
+                foreach (var logClass in Enum.GetValues<LogClass>())
                 {
-                    logFile = FileLogTarget.PrepareLogFile(logDir);
+                    Logger.SetEnable(logClass, noFilter);
                 }
 
-                if (logFile == null)
+                foreach (var logClass in e.NewValue)
+                {
+                    Logger.SetEnable(logClass, true);
+                }
+            };
+
+            ConfigurationState.Instance.Logger.EnableFileLog.Event += (_, e) =>
+            {
+                if (e.NewValue)
+                {
+                    string logDir = AppDataManager.LogsDirPath;
+                    FileStream logFile = null;
+
+                    if (!string.IsNullOrEmpty(logDir))
+                    {
+                        logFile = FileLogTarget.PrepareLogFile(logDir);
+                    }
+
+                    if (logFile == null)
+                    {
+                        Logger.Error?.Print(LogClass.Application,
+                            "No writable log directory available. Make sure either the Logs directory, Application Data, or the Ryujinx directory is writable.");
+                        Logger.RemoveTarget("file");
+
+                        return;
+                    }
+
+                    Logger.AddTarget(new AsyncLogTargetWrapper(
+                        new FileLogTarget("file", logFile),
+                        1000
+                    ));
+                }
+                else
                 {
-                    Logger.Error?.Print(LogClass.Application, "No writable log directory available. Make sure either the Logs directory, Application Data, or the Ryujinx directory is writable.");
                     Logger.RemoveTarget("file");
-
-                    return;
                 }
-
-                Logger.AddTarget(new AsyncLogTargetWrapper(
-                    new FileLogTarget("file", logFile),
-                    1000,
-                    AsyncLogTargetOverflowAction.Block
-                ));
-            }
-            else
-            {
-                Logger.RemoveTarget("file");
-            }
+            };
         }
     }
 }

src/Ryujinx.UI.Common/Configuration/UI/GuiColumns.cs

@@ -7,6 +7,7 @@ namespace Ryujinx.UI.Common.Configuration.UI
         public bool AppColumn { get; set; }
         public bool DevColumn { get; set; }
         public bool VersionColumn { get; set; }
+        public bool LdnInfoColumn { get; set; }
         public bool TimePlayedColumn { get; set; }
         public bool LastPlayedColumn { get; set; }
         public bool FileExtColumn { get; set; }

src/Ryujinx.UI.Common/DiscordIntegrationModule.cs

@@ -1,11 +1,10 @@
 using DiscordRPC;
 using Humanizer;
-using LibHac.Bcat;
+using Humanizer.Localisation;
 using Ryujinx.Common;
 using Ryujinx.HLE.Loaders.Processes;
 using Ryujinx.UI.App.Common;
 using Ryujinx.UI.Common.Configuration;
-using System.Collections.Generic;
 using System.Linq;
 using System.Text;
 
@@ -15,9 +14,13 @@ namespace Ryujinx.UI.Common
     {
         public static Timestamps StartedAt { get; set; }
 
-        private static readonly string _description = ReleaseInformation.IsValid
-                ? $"v{ReleaseInformation.Version} {ReleaseInformation.ReleaseChannelOwner}/{ReleaseInformation.ReleaseChannelRepo}@{ReleaseInformation.BuildGitHash}"
-                : "dev build";
+        private static string VersionString
+            => (ReleaseInformation.IsCanaryBuild ? "Canary " : string.Empty) + $"v{ReleaseInformation.Version}"; 
+
+        private static readonly string _description = 
+            ReleaseInformation.IsValid 
+                    ? $"{VersionString} {ReleaseInformation.ReleaseChannelOwner}/{ReleaseInformation.ReleaseChannelSourceRepo}@{ReleaseInformation.BuildGitHash}" 
+                    : "dev build";
 
         private const string ApplicationId = "1293250299716173864";
 
@@ -74,13 +77,13 @@ namespace Ryujinx.UI.Common
                 Assets = new Assets
                 {
                     LargeImageKey = _discordGameAssetKeys.Contains(procRes.ProgramIdText) ? procRes.ProgramIdText : "game",
-                    LargeImageText = TruncateToByteLength($"{appMeta.Title} | {procRes.DisplayVersion}"),
+                    LargeImageText = TruncateToByteLength($"{appMeta.Title} (v{procRes.DisplayVersion})"),
                     SmallImageKey = "ryujinx",
                     SmallImageText = TruncateToByteLength(_description)
                 },
                 Details = TruncateToByteLength($"Playing {appMeta.Title}"),
                 State = appMeta.LastPlayed.HasValue && appMeta.TimePlayed.TotalSeconds > 5
-                    ? $"Total play time: {appMeta.TimePlayed.Humanize(2, false)}"
+                    ? $"Total play time: {appMeta.TimePlayed.Humanize(2, false, maxUnit: TimeUnit.Hour)}"
                     : "Never played",
                 Timestamps = Timestamps.Now
             });
@@ -122,70 +125,146 @@ namespace Ryujinx.UI.Common
 
         private static readonly string[] _discordGameAssetKeys =
         [
-            "01002da013484000", // The Legend of Zelda: Skyward Sword HD
+            "010055d009f78000", // Fire Emblem: Three Houses
+            "0100a12011cc8000", // Fire Emblem: Shadow Dragon
+            "0100a6301214e000", // Fire Emblem Engage
+            "0100f15003e64000", // Fire Emblem Warriors
+            "010071f0143ea000", // Fire Emblem Warriors: Three Hopes
+
+            "01007e3006dda000", // Kirby Star Allies
+            "01004d300c5ae000", // Kirby and the Forgotten Land
+            "01006b601380e000", // Kirby's Return to Dream Land Deluxe
+            "01003fb00c5a8000", // Super Kirby Clash
+            "0100227010460000", // Kirby Fighters 2
+            "0100a8e016236000", // Kirby's Dream Buffet
+
             "01007ef00011e000", // The Legend of Zelda: Breath of the Wild
+            "01006bb00c6f0000", // The Legend of Zelda: Link's Awakening
+            "01002da013484000", // The Legend of Zelda: Skyward Sword HD
             "0100f2c0115b6000", // The Legend of Zelda: Tears of the Kingdom
             "01008cf01baac000", // The Legend of Zelda: Echoes of Wisdom
-            "01006bb00c6f0000", // The Legend of Zelda: Link's Awakening
-
-            "0100000000010000", // SUPER MARIO ODYSSEY
-            "010015100b514000", // Super Mario Bros. Wonder
-            "0100152000022000", // Mario Kart 8 Deluxe
-            "01006fe013472000", // Mario Party Superstars
-            "0100965017338000", // Super Mario Party Jamboree
-            "010049900f546000", // Super Mario 3D All-Stars
-            "010028600ebda000", // Super Mario 3D World + Bowser's Fury
-            "0100ecd018ebe000", // Paper Mario: The Thousand-Year Door
-            "010019401051c000", // Mario Strikers League
-            "0100ea80032ea000", // Super Mario Bros. U Deluxe
-            "0100bc0018138000", // Super Mario RPG
-            "0100bde00862a000", // Mario Tennis Aces
+            "01000b900d8b0000", // Cadence of Hyrule
+            "0100ae00096ea000", // Hyrule Warriors: Definitive Edition
+            "01002b00111a2000", // Hyrule Warriors: Age of Calamity
 
             "010048701995e000", // Luigi's Mansion 2 HD
             "0100dca0064a6000", // Luigi's Mansion 3
 
-            "01008f6008c5e000", // Pokémon Violet
-            "0100abf008968000", // Pokémon Sword
-            "01008db008c2c000", // Pokémon Shield
-            "0100000011d90000", // Pokémon Brilliant Diamond
-            "01001f5010dfa000", // Pokémon Legends: Arceus
+            "010093801237c000", // Metroid Dread
+            "010012101468c000", // Metroid Prime Remastered
+
+            "0100000000010000", // SUPER MARIO ODYSSEY
+            "0100ea80032ea000", // Super Mario Bros. U Deluxe
+            "01009b90006dc000", // Super Mario Maker 2
+            "010049900f546000", // Super Mario 3D All-Stars
+            "010049900F546001", // ^ 64
+            "010049900F546002", // ^ Sunshine
+            "010049900F546003", // ^ Galaxy
+            "010028600ebda000", // Super Mario 3D World + Bowser's Fury
+            "010015100b514000", // Super Mario Bros. Wonder
+            "0100152000022000", // Mario Kart 8 Deluxe
+            "010036b0034e4000", // Super Mario Party
+            "01006fe013472000", // Mario Party Superstars
+            "0100965017338000", // Super Mario Party Jamboree
+            "01006d0017f7a000", // Mario & Luigi: Brothership
+            "010067300059a000", // Mario + Rabbids: Kingdom Battle
+            "0100317013770000", // Mario + Rabbids: Sparks of Hope
+            "0100a3900c3e2000", // Paper Mario: The Origami King
+            "0100ecd018ebe000", // Paper Mario: The Thousand-Year Door
+            "0100bc0018138000", // Super Mario RPG
+            "0100bde00862a000", // Mario Tennis Aces
+            "0100c9c00e25c000", // Mario Golf: Super Rush
+            "010019401051c000", // Mario Strikers: Battle League
+            "010003000e146000", // Mario & Sonic at the Olympic Games Tokyo 2020
+            "0100b99019412000", // Mario vs. Donkey Kong
 
             "0100aa80194b0000", // Pikmin 1
             "0100d680194b2000", // Pikmin 2
             "0100f4c009322000", // Pikmin 3 Deluxe
             "0100b7c00933a000", // Pikmin 4
-            
+
+            "010003f003a34000", // Pokémon: Let's Go Pikachu!
+            "0100187003a36000", // Pokémon: Let's Go Eevee!
+            "0100abf008968000", // Pokémon Sword
+            "01008db008c2c000", // Pokémon Shield
+            "0100000011d90000", // Pokémon Brilliant Diamond
+            "010018e011d92000", // Pokémon Shining Pearl
+            "01001f5010dfa000", // Pokémon Legends: Arceus
+            "0100a3d008c5c000", // Pokémon Scarlet
+            "01008f6008c5e000", // Pokémon Violet
+            "0100b3f000be2000", // Pokkén Tournament DX
+            "0100f4300bf2c000", // New Pokémon Snap
+
+            "01003bc0000a0000", // Splatoon 2 (US)
+            "0100f8f0000a2000", // Splatoon 2 (EU)
+            "01003c700009c000", // Splatoon 2 (JP)
+            "0100c2500fc20000", // Splatoon 3
+            "0100ba0018500000", // Splatoon 3: Splatfest World Premiere
+
+            "010040600c5ce000", // Tetris 99
+            "0100277011f1a000", // Super Mario Bros. 35
+            "0100ad9012510000", // PAC-MAN 99
+            "0100ccf019c8c000", // F-ZERO 99
+            "0100d870045b6000", // NES - Nintendo Switch Online
+            "01008d300c50c000", // SNES - Nintendo Switch Online
+            "0100c9a00ece6000", // N64 - Nintendo Switch Online
+            "0100e0601c632000", // N64 - Nintendo Switch Online 18+
+            "0100c62011050000", // GB - Nintendo Switch Online
+            "010012f017576000", // GBA - Nintendo Switch Online
+
+            "01000320000cc000", // 1-2 Switch
+            "0100300012f2a000", // Advance Wars 1+2: Re-Boot Camp
+            "01006f8002326000", // Animal Crossing: New Horizons
+            "0100620012d6e000", // Big Brain Academy: Brain vs. Brain
+            "010018300d006000", // BOXBOY! + BOXGIRL!
+            "0100c1f0051b6000", // Donkey Kong Country: Tropical Freeze
+            "0100ed000d390000", // Dr. Kawashima's Brain Training
+            "010067b017588000", // Endless Ocean Luminous
+            "0100d2f00d5c0000", // Nintendo Switch Sports
+            "01006b5012b32000", // Part Time UFO
+            "0100704000B3A000", // Snipperclips
+            "01006a800016e000", // Super Smash Bros. Ultimate
+            "0100a9400c9c2000", // Tokyo Mirage Sessions #FE Encore
+
+            "010076f0049a2000", // Bayonetta
+            "01007960049a0000", // Bayonetta 2
+            "01004a4010fea000", // Bayonetta 3
+            "0100cf5010fec000", // Bayonetta Origins: Cereza and the Lost Demon
+
+            "0100dcd01525a000", // Persona 3 Portable
+            "010062b01525c000", // Persona 4 Golden
+            "010075a016a3a000", // Persona 4 Arena Ultimax
+            "01005ca01580e000", // Persona 5 Royal
+            "0100801011c3e000", // Persona 5 Strikers
+            "010087701b092000", // Persona 5 Tactica
+
+            "01009aa000faa000", // Sonic Mania
             "01004ad014bf0000", // Sonic Frontiers
             "01005ea01c0fc000", // SONIC X SHADOW GENERATIONS
             "01005ea01c0fc001", // ^
-            
-            "01004d300c5ae000", // Kirby and the Forgotten Land
-            "01006b601380e000", // Kirby's Return to Dreamland Deluxe
-            "01007e3006dda000", // Kirby Star Allies 
 
-            "0100c2500fc20000", // Splatoon 3
-            "0100ba0018500000", // Splatoon 3: Splatfest World Premiere
-            "01000a10041ea000", // The Elder Scrolls V: Skyrim
-            "01007820196a6000", // Red Dead Redemption
-            "01008c8012920000", // Dying Light Platinum Edition
-            "0100744001588000", // Cars 3: Driven to Win
-            "0100c1f0051b6000", // Donkey Kong Country: Tropical Freeze
-            "01002b00111a2000", // Hyrule Warriors: Age of Calamity
-            "01006f8002326000", // Animal Crossing: New Horizons
-            "0100853015e86000", // No Man's Sky
-            "01008d100d43e000", // Saints Row IV
-            "0100de600beee000", // Saints Row: The Third - The Full Package
-            "0100d7a01b7a2000", // Star Wars: Bounty Hunter
-            "0100dbf01000a000", // Burnout Paradise Remastered
-            "0100e46006708000", // Terraria
             "010056e00853a000", // A Hat in Time
-            "01006a800016e000", // Super Smash Bros. Ultimate
+            "0100dbf01000a000", // Burnout Paradise Remastered
+            "0100744001588000", // Cars 3: Driven to Win
+            "0100b41013c82000", // Cruis'n Blast
+            "01008c8012920000", // Dying Light Platinum Edition
+            "010073c01af34000", // LEGO Horizon Adventures
+            "0100770008dd8000", // Monster Hunter Generations Ultimate
+            "0100b04011742000", // Monster Hunter Rise
+            "0100853015e86000", // No Man's Sky
             "01007bb017812000", // Portal
             "0100abd01785c000", // Portal 2
             "01008e200c5c2000", // Muse Dash
+            "01007820196a6000", // Red Dead Redemption
+            "01002f7013224000", // Rune Factory 5
+            "01008d100d43e000", // Saints Row IV
+            "0100de600beee000", // Saints Row: The Third - The Full Package
             "01001180021fa000", // Shovel Knight: Specter of Torment
-            "010012101468c000", // Metroid Prime Remastered
-            "0100c9a00ece6000", // Nintendo 64 - Nintendo Switch Online
+            "0100d7a01b7a2000", // Star Wars: Bounty Hunter
+            "0100800015926000", // Suika Game
+            "0100e46006708000", // Terraria
+            "01000a10041ea000", // The Elder Scrolls V: Skyrim
+            "010080b00ad66000", // Undertale
         ];
     }
 }

src/Ryujinx.UI.Common/Helper/CommandLineState.cs

@@ -16,6 +16,7 @@ namespace Ryujinx.UI.Common.Helper
         public static string LaunchPathArg { get; private set; }
         public static string LaunchApplicationId { get; private set; }
         public static bool StartFullscreenArg { get; private set; }
+        public static bool HideAvailableUpdates { get; private set; }
 
         public static void ParseArguments(string[] args)
         {
@@ -93,6 +94,9 @@ namespace Ryujinx.UI.Common.Helper
 
                         OverrideHideCursor = args[++i];
                         break;
+                    case "--hide-updates":
+                        HideAvailableUpdates = true;
+                        break;
                     case "--software-gui":
                         OverrideHardwareAcceleration = false;
                         break;

src/Ryujinx.UI.Common/Helper/FileAssociationHelper.cs

@@ -4,6 +4,7 @@ using Ryujinx.Common.Logging;
 using System;
 using System.Diagnostics;
 using System.IO;
+using System.Linq;
 using System.Runtime.InteropServices;
 using System.Runtime.Versioning;
 
@@ -23,6 +24,26 @@ namespace Ryujinx.UI.Common.Helper
         public static partial void SHChangeNotify(uint wEventId, uint uFlags, nint dwItem1, nint dwItem2);
 
         public static bool IsTypeAssociationSupported => (OperatingSystem.IsLinux() || OperatingSystem.IsWindows()) && !ReleaseInformation.IsFlatHubBuild;
+        
+        public static bool AreMimeTypesRegistered
+        {
+            get
+            {
+                if (OperatingSystem.IsLinux())
+                {
+                    return AreMimeTypesRegisteredLinux();
+                }
+
+                if (OperatingSystem.IsWindows())
+                {
+                    return AreMimeTypesRegisteredWindows();
+                }
+
+                // TODO: Add macOS support.
+
+                return false;
+            }
+        }
 
         [SupportedOSPlatform("linux")]
         private static bool AreMimeTypesRegisteredLinux() => File.Exists(Path.Combine(_mimeDbPath, "packages", "Ryujinx.xml"));
@@ -72,6 +93,10 @@ namespace Ryujinx.UI.Common.Helper
         [SupportedOSPlatform("windows")]
         private static bool AreMimeTypesRegisteredWindows()
         {
+            return _fileExtensions.Aggregate(false, 
+                (current, ext) => current | CheckRegistering(ext)
+            );
+            
             static bool CheckRegistering(string ext)
             {
                 RegistryKey key = Registry.CurrentUser.OpenSubKey(@$"Software\Classes\{ext}");
@@ -87,20 +112,20 @@ namespace Ryujinx.UI.Common.Helper
 
                 return keyValue is not null && (keyValue.Contains("Ryujinx") || keyValue.Contains(AppDomain.CurrentDomain.FriendlyName));
             }
-
-            bool registered = false;
-
-            foreach (string ext in _fileExtensions)
-            {
-                registered |= CheckRegistering(ext);
-            }
-
-            return registered;
         }
 
         [SupportedOSPlatform("windows")]
         private static bool InstallWindowsMimeTypes(bool uninstall = false)
         {
+            bool registered = _fileExtensions.Aggregate(false, 
+                (current, ext) => current | RegisterExtension(ext, uninstall)
+            );
+
+            // Notify Explorer the file association has been changed.
+            SHChangeNotify(SHCNE_ASSOCCHANGED, SHCNF_FLUSH, nint.Zero, nint.Zero);
+
+            return registered;
+            
             static bool RegisterExtension(string ext, bool uninstall = false)
             {
                 string keyString = @$"Software\Classes\{ext}";
@@ -127,42 +152,13 @@ namespace Ryujinx.UI.Common.Helper
 
                     Logger.Debug?.Print(LogClass.Application, $"Adding type association {ext}");
                     using var openCmd = key.CreateSubKey(@"shell\open\command");
-                    openCmd.SetValue("", $"\"{Environment.ProcessPath}\" \"%1\"");
+                    openCmd.SetValue(string.Empty, $"\"{Environment.ProcessPath}\" \"%1\"");
                     Logger.Debug?.Print(LogClass.Application, $"Added type association {ext}");
 
                 }
 
                 return true;
             }
-
-            bool registered = false;
-
-            foreach (string ext in _fileExtensions)
-            {
-                registered |= RegisterExtension(ext, uninstall);
-            }
-
-            // Notify Explorer the file association has been changed.
-            SHChangeNotify(SHCNE_ASSOCCHANGED, SHCNF_FLUSH, nint.Zero, nint.Zero);
-
-            return registered;
-        }
-
-        public static bool AreMimeTypesRegistered()
-        {
-            if (OperatingSystem.IsLinux())
-            {
-                return AreMimeTypesRegisteredLinux();
-            }
-
-            if (OperatingSystem.IsWindows())
-            {
-                return AreMimeTypesRegisteredWindows();
-            }
-
-            // TODO: Add macOS support.
-
-            return false;
         }
 
         public static bool Install()

src/Ryujinx.UI.Common/Models/Github/GithubReleasesJsonResponse.cs

@@ -5,6 +5,8 @@ namespace Ryujinx.UI.Common.Models.Github
     public class GithubReleasesJsonResponse
     {
         public string Name { get; set; }
+        
+        public string TagName { get; set; }
         public List<GithubReleaseAssetJsonResponse> Assets { get; set; }
     }
 }