Refactoring HOS folder structure (#771)

* Refactoring HOS folder structure

Refactoring HOS folder structure:

- Added some subfolders when needed (Following structure decided in private).
- Added some `Types` folders when needed.
- Little cleanup here and there.
- Add services placeholders for every HOS services (close #766 and #753).

* Remove Types namespaces

Ryujinx.HLE/HOS/Services/Nifm/StaticService/IGeneralService.cs

@@ -0,0 +1,93 @@
+using Ryujinx.Common.Logging;
+using Ryujinx.HLE.HOS.Services.Nifm.StaticService.GeneralService;
+using System;
+using System.Linq;
+using System.Net;
+using System.Net.NetworkInformation;
+using System.Net.Sockets;
+
+namespace Ryujinx.HLE.HOS.Services.Nifm.StaticService
+{
+    class IGeneralService : IpcService, IDisposable
+    {
+        private GeneralServiceDetail _generalServiceDetail;
+
+        public IGeneralService()
+        {
+            _generalServiceDetail = new GeneralServiceDetail
+            {
+                ClientId                     = GeneralServiceManager.Count,
+                IsAnyInternetRequestAccepted = true // NOTE: Why not accept any internet request?
+            };
+
+            GeneralServiceManager.Add(_generalServiceDetail);
+        }
+
+        [Command(1)]
+        // GetClientId() -> buffer<nn::nifm::ClientId, 0x1a, 4>
+        public ResultCode GetClientId(ServiceCtx context)
+        {
+            long position = context.Request.RecvListBuff[0].Position;
+            long size     = context.Request.RecvListBuff[0].Size;
+
+            context.Memory.WriteInt32(position, _generalServiceDetail.ClientId);
+
+            return ResultCode.Success;
+        }
+
+        [Command(4)]
+        // CreateRequest(u32 version) -> object<nn::nifm::detail::IRequest>
+        public ResultCode CreateRequest(ServiceCtx context)
+        {
+            uint version = context.RequestData.ReadUInt32();
+
+            MakeObject(context, new IRequest(context.Device.System, version));
+
+            // Doesn't occur in our case.
+            // return ResultCode.ObjectIsNull;
+
+            Logger.PrintStub(LogClass.ServiceNifm, new { version });
+
+            return ResultCode.Success;
+        }
+
+        [Command(12)]
+        // GetCurrentIpAddress() -> nn::nifm::IpV4Address
+        public ResultCode GetCurrentIpAddress(ServiceCtx context)
+        {
+            if (!NetworkInterface.GetIsNetworkAvailable())
+            {
+                return ResultCode.NoInternetConnection;
+            }
+
+            IPHostEntry host = Dns.GetHostEntry(Dns.GetHostName());
+
+            IPAddress address = host.AddressList.FirstOrDefault(a => a.AddressFamily == AddressFamily.InterNetwork);
+
+            context.ResponseData.Write(BitConverter.ToUInt32(address.GetAddressBytes()));
+
+            Logger.PrintInfo(LogClass.ServiceNifm, $"Console's local IP is \"{address}\".");
+
+            return ResultCode.Success;
+        }
+
+        [Command(21)]
+        // IsAnyInternetRequestAccepted(buffer<nn::nifm::ClientId, 0x19, 4>) -> bool
+        public ResultCode IsAnyInternetRequestAccepted(ServiceCtx context)
+        {
+            long position = context.Request.PtrBuff[0].Position;
+            long size     = context.Request.PtrBuff[0].Size;
+
+            int clientId = context.Memory.ReadInt32(position);
+
+            context.ResponseData.Write(GeneralServiceManager.Get(clientId).IsAnyInternetRequestAccepted);
+
+            return ResultCode.Success;
+        }
+
+        public void Dispose()
+        {
+            GeneralServiceManager.Remove(_generalServiceDetail.ClientId);
+        }
+    }
+}