Address gdkchan's comment

This is needed to run Pokemon Legends Arceus 1.1.1 with guest internet enabled.

The game still get stuck at loading screen.

Ryujinx.HLE/HOS/Services/Account/Acc/AccountService/IManagerForApplication.cs

@@ -57,5 +57,19 @@ namespace Ryujinx.HLE.HOS.Services.Account.Acc.AccountService
         {
             return _managerServer.StoreOpenContext(context);
         }
+
+        [CommandHipc(170)] // 6.0.0+
+        // LoadNetworkServiceLicenseKindAsync() -> object<nn::account::detail::IAsyncNetworkServiceLicenseKindContext>
+        public ResultCode LoadNetworkServiceLicenseKindAsync(ServiceCtx context)
+        {
+            ResultCode resultCode = _managerServer.LoadNetworkServiceLicenseKindAsync(context, out IAsyncNetworkServiceLicenseKindContext asyncContext);
+
+            if (resultCode == ResultCode.Success)
+            {
+                MakeObject(context, asyncContext);
+            }
+
+            return resultCode;
+        }
     }
 }

Ryujinx.HLE/HOS/Services/Account/Acc/AccountService/ManagerServer.cs

@@ -166,5 +166,22 @@ namespace Ryujinx.HLE.HOS.Services.Account.Acc.AccountService
 
             return ResultCode.Success;
         }
+
+        public ResultCode LoadNetworkServiceLicenseKindAsync(ServiceCtx context, out IAsyncNetworkServiceLicenseKindContext asyncContext)
+        {
+            KEvent asyncEvent = new KEvent(context.Device.System.KernelContext);
+            AsyncExecution asyncExecution = new AsyncExecution(asyncEvent);
+
+            Logger.Stub?.PrintStub(LogClass.ServiceAcc);
+
+            // NOTE: This is an extension of the data retrieved from the id token cache.
+            asyncExecution.Initialize(1000, EnsureIdTokenCacheAsyncImpl);
+
+            asyncContext = new IAsyncNetworkServiceLicenseKindContext(asyncExecution, NetworkServiceLicenseKind.Subscribed);
+
+            // return ResultCode.NullObject if the IAsyncNetworkServiceLicenseKindContext pointer is null. Doesn't occur in our case.
+
+            return ResultCode.Success;
+        }
     }
 }

Ryujinx.HLE/HOS/Services/Account/Acc/IAsyncContext.cs

@@ -7,18 +7,18 @@ namespace Ryujinx.HLE.HOS.Services.Account.Acc
 {
     class IAsyncContext : IpcService
     {
-        AsyncExecution _asyncExecution;
+        protected AsyncExecution AsyncExecution;
 
         public IAsyncContext(AsyncExecution asyncExecution)
         {
-            _asyncExecution = asyncExecution;
+            AsyncExecution = asyncExecution;
         }
 
         [CommandHipc(0)]
         // GetSystemEvent() -> handle<copy>
         public ResultCode GetSystemEvent(ServiceCtx context)
         {
-            if (context.Process.HandleTable.GenerateHandle(_asyncExecution.SystemEvent.ReadableEvent, out int _systemEventHandle) != KernelResult.Success)
+            if (context.Process.HandleTable.GenerateHandle(AsyncExecution.SystemEvent.ReadableEvent, out int _systemEventHandle) != KernelResult.Success)
             {
                 throw new InvalidOperationException("Out of handles!");
             }
@@ -32,14 +32,14 @@ namespace Ryujinx.HLE.HOS.Services.Account.Acc
         // Cancel()
         public ResultCode Cancel(ServiceCtx context)
         {
-            if (!_asyncExecution.IsInitialized)
+            if (!AsyncExecution.IsInitialized)
             {
                 return ResultCode.AsyncExecutionNotInitialized;
             }
 
-            if (_asyncExecution.IsRunning)
+            if (AsyncExecution.IsRunning)
             {
-                _asyncExecution.Cancel();
+                AsyncExecution.Cancel();
             }
 
             return ResultCode.Success;
@@ -49,12 +49,12 @@ namespace Ryujinx.HLE.HOS.Services.Account.Acc
         // HasDone() -> b8
         public ResultCode HasDone(ServiceCtx context)
         {
-            if (!_asyncExecution.IsInitialized)
+            if (!AsyncExecution.IsInitialized)
             {
                 return ResultCode.AsyncExecutionNotInitialized;
             }
 
-            context.ResponseData.Write(_asyncExecution.SystemEvent.ReadableEvent.IsSignaled());
+            context.ResponseData.Write(AsyncExecution.SystemEvent.ReadableEvent.IsSignaled());
 
             return ResultCode.Success;
         }
@@ -63,12 +63,12 @@ namespace Ryujinx.HLE.HOS.Services.Account.Acc
         // GetResult()
         public ResultCode GetResult(ServiceCtx context)
         {
-            if (!_asyncExecution.IsInitialized)
+            if (!AsyncExecution.IsInitialized)
             {
                 return ResultCode.AsyncExecutionNotInitialized;
             }
 
-            if (!_asyncExecution.SystemEvent.ReadableEvent.IsSignaled())
+            if (!AsyncExecution.SystemEvent.ReadableEvent.IsSignaled())
             {
                 return ResultCode.Unknown41;
             }

Ryujinx.HLE/HOS/Services/Account/Acc/IAsyncNetworkServiceLicenseKindContext.cs

@@ -0,0 +1,38 @@
+using Ryujinx.HLE.HOS.Services.Account.Acc.AsyncContext;
+
+namespace Ryujinx.HLE.HOS.Services.Account.Acc
+{
+    class IAsyncNetworkServiceLicenseKindContext : IAsyncContext
+    {
+        private NetworkServiceLicenseKind? _serviceLicenseKind;
+
+        public IAsyncNetworkServiceLicenseKindContext(AsyncExecution asyncExecution, NetworkServiceLicenseKind? serviceLicenseKind) : base(asyncExecution)
+        {
+            _serviceLicenseKind = serviceLicenseKind;
+        }
+
+        [CommandHipc(100)]
+        // GetNetworkServiceLicenseKind() -> nn::account::NetworkServiceLicenseKind
+        public ResultCode GetNetworkServiceLicenseKind(ServiceCtx context)
+        {
+            if (!AsyncExecution.IsInitialized)
+            {
+                return ResultCode.AsyncExecutionNotInitialized;
+            }
+
+            if (!AsyncExecution.SystemEvent.ReadableEvent.IsSignaled())
+            {
+                return ResultCode.Unknown41;
+            }
+
+            if (!_serviceLicenseKind.HasValue)
+            {
+                return ResultCode.MissingNetworkServiceLicenseKind;
+            }
+
+            context.ResponseData.Write((uint)_serviceLicenseKind.Value);
+
+            return ResultCode.Success;
+        }
+    }
+}

Ryujinx.HLE/HOS/Services/Account/Acc/Types/NetworkServiceLicenseKind.cs

@@ -0,0 +1,8 @@
+namespace Ryujinx.HLE.HOS.Services.Account.Acc
+{
+    enum NetworkServiceLicenseKind : uint
+    {
+        NoSubscription,
+        Subscribed
+    }
+}

Ryujinx.HLE/HOS/Services/Account/ResultCode.cs

@@ -7,17 +7,18 @@ namespace Ryujinx.HLE.HOS.Services.Account
 
         Success = 0,
 
-        NullArgument                  = (20  << ErrorCodeShift) | ModuleId,
-        InvalidArgument               = (22  << ErrorCodeShift) | ModuleId,
-        NullInputBuffer               = (30  << ErrorCodeShift) | ModuleId,
-        InvalidBufferSize             = (31  << ErrorCodeShift) | ModuleId,
-        InvalidBuffer                 = (32  << ErrorCodeShift) | ModuleId,
-        AsyncExecutionNotInitialized  = (40  << ErrorCodeShift) | ModuleId,
-        Unknown41                     = (41  << ErrorCodeShift) | ModuleId,
-        InternetRequestDenied         = (59  << ErrorCodeShift) | ModuleId,
-        UserNotFound                  = (100 << ErrorCodeShift) | ModuleId,
-        NullObject                    = (302 << ErrorCodeShift) | ModuleId,
-        Unknown341                    = (341 << ErrorCodeShift) | ModuleId,
-        InvalidIdTokenCacheBufferSize = (451 << ErrorCodeShift) | ModuleId
+        NullArgument                     = (20  << ErrorCodeShift) | ModuleId,
+        InvalidArgument                  = (22  << ErrorCodeShift) | ModuleId,
+        NullInputBuffer                  = (30  << ErrorCodeShift) | ModuleId,
+        InvalidBufferSize                = (31  << ErrorCodeShift) | ModuleId,
+        InvalidBuffer                    = (32  << ErrorCodeShift) | ModuleId,
+        AsyncExecutionNotInitialized     = (40  << ErrorCodeShift) | ModuleId,
+        Unknown41                        = (41  << ErrorCodeShift) | ModuleId,
+        InternetRequestDenied            = (59  << ErrorCodeShift) | ModuleId,
+        UserNotFound                     = (100 << ErrorCodeShift) | ModuleId,
+        NullObject                       = (302 << ErrorCodeShift) | ModuleId,
+        Unknown341                       = (341 << ErrorCodeShift) | ModuleId,
+        MissingNetworkServiceLicenseKind = (400 << ErrorCodeShift) | ModuleId,
+        InvalidIdTokenCacheBufferSize    = (451 << ErrorCodeShift) | ModuleId
     }
 }

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

@@ -323,9 +323,14 @@ namespace Ryujinx.HLE.HOS.Services.Sockets.Bsd
 
                 int value = optionValue.Length >= 4 ? MemoryMarshal.Read<int>(optionValue) : MemoryMarshal.Read<byte>(optionValue);
 
-                if (option == BsdSocketOption.SoLinger)
+                if (level == SocketOptionLevel.Socket && option == BsdSocketOption.SoLinger)
                 {
-                    int value2 = MemoryMarshal.Read<int>(optionValue[4..]);
+                    int value2 = 0;
+
+                    if (optionValue.Length >= 8)
+                    {
+                        value2 = MemoryMarshal.Read<int>(optionValue[4..]);
+                    }
 
                     Socket.SetSocketOption(level, SocketOptionName.Linger, new LingerOption(value != 0, value2));
                 }