ryujinx/Ryujinx.HLE/HOS/Services/Mnpp/IServiceForApplication.cs

using Ryujinx.Common;
using Ryujinx.Common.Logging;
using Ryujinx.Cpu;
using Ryujinx.HLE.HOS.Services.Account.Acc;

namespace Ryujinx.HLE.HOS.Services.Mnpp
{
    [Service("mnpp:app")] // 13.0.0+
    class IServiceForApplication : IpcService
    {
        public IServiceForApplication(ServiceCtx context) { }

        [CommandHipc(0)]
        // Initialize(pid)
        public ResultCode Initialize(ServiceCtx context)
        {
            // Pid placeholder
            context.RequestData.ReadInt64();
            ulong pid = context.Request.HandleDesc.PId;

            // TODO: Service calls set:sys GetPlatformRegion.
            //       If the result == 1 (China) it calls arp:r GetApplicationInstanceId and GetApplicationLaunchProperty to get the title id and store it internally.
            //       If not, it does nothing.

            Logger.Stub?.PrintStub(LogClass.ServiceMnpp, new { pid });

            return ResultCode.Success;
        }

        [CommandHipc(1)]
        // SendRawTelemetryData(nn::account::Uid user_id, buffer<bytes, 5> title_id)
        public ResultCode SendRawTelemetryData(ServiceCtx context)
        {
            ulong titleIdInputPosition = context.Request.SendBuff[0].Position;
            ulong titleIdInputSize     = context.Request.SendBuff[0].Size;

            UserId userId = context.RequestData.ReadStruct<UserId>();

            // TODO: Service calls set:sys GetPlatformRegion.
            //       If the result != 1 (China) it returns ResultCode.Success.

            if (userId.IsNull)
            {
                return ResultCode.InvalidArgument;
            }

            if (titleIdInputSize <= 64)
            {
                string titleId = MemoryHelper.ReadAsciiString(context.Memory, titleIdInputPosition, (long)titleIdInputSize);

                // TODO: The service stores the titleId internally and seems proceed to some telemetry for China, which is not needed here.

                Logger.Stub?.PrintStub(LogClass.ServiceMnpp, new { userId, titleId });

                return ResultCode.Success;
            }

            Logger.Stub?.PrintStub(LogClass.ServiceMnpp, new { userId });

            return ResultCode.InvalidBufferSize;
        }
    }
}