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Ryujinx/Ryujinx.HLE/HOS/Services/Prepo/IPrepoService.cs

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using Ryujinx.Common.Logging;
using Ryujinx.HLE.Utilities;
using System;
using System.Buffers.Binary;
using System.IO;
using System.Text;
namespace Ryujinx.HLE.HOS.Services.Prepo
{
[Service("prepo:a")]
[Service("prepo:a2")]
[Service("prepo:u")]
class IPrepoService : IpcService
{
public IPrepoService(ServiceCtx context) { }
[Command(10100)] // 1.0.0-5.1.0
// SaveReport(u64, pid, buffer<u8, 9>, buffer<bytes, 5>)
public ResultCode SaveReportOld(ServiceCtx context)
{
// We don't care about the differences since we don't use the play report.
return ProcessReport(context, withUserID: false);
}
[Command(10101)] // 1.0.0-5.1.0
// SaveReportWithUserOld(nn::account::Uid, u64, pid, buffer<u8, 9>, buffer<bytes, 5>)
public ResultCode SaveReportWithUserOld(ServiceCtx context)
{
// We don't care about the differences since we don't use the play report.
return ProcessReport(context, withUserID: true);
}
[Command(10102)] // 6.0.0+
// SaveReport(u64, pid, buffer<u8, 9>, buffer<bytes, 5>)
public ResultCode SaveReport(ServiceCtx context)
{
// We don't care about the differences since we don't use the play report.
return ProcessReport(context, withUserID: false);
}
[Command(10103)] // 6.0.0+
// SaveReportWithUser(nn::account::Uid, u64, pid, buffer<u8, 9>, buffer<bytes, 5>)
public ResultCode SaveReportWithUser(ServiceCtx context)
{
// We don't care about the differences since we don't use the play report.
return ProcessReport(context, withUserID: true);
}
private ResultCode ProcessReport(ServiceCtx context, bool withUserID)
{
UInt128 userId = withUserID ? new UInt128(context.RequestData.ReadBytes(0x10)) : new UInt128();
string gameRoom = StringUtils.ReadUtf8String(context);
if (withUserID)
{
if (userId.IsNull)
{
return ResultCode.InvalidArgument;
}
}
if (gameRoom == string.Empty)
{
return ResultCode.InvalidState;
}
long inputPosition = context.Request.SendBuff[0].Position;
long inputSize = context.Request.SendBuff[0].Size;
if (inputSize == 0)
{
return ResultCode.InvalidBufferSize;
}
byte[] inputBuffer = context.Memory.ReadBytes(inputPosition, inputSize);
Logger.PrintInfo(LogClass.ServicePrepo, ReadReportBuffer(inputBuffer, gameRoom, userId));
return ResultCode.Success;
}
public string ReadReportBuffer(byte[] buffer, string room, UInt128 userId)
{
StringBuilder sb = new StringBuilder();
sb.AppendLine();
sb.AppendLine("PlayReport log:");
if (!userId.IsNull)
{
sb.AppendLine($" UserId: {userId.ToString()}");
}
sb.AppendLine($" Room: {room}");
try
{
using (MemoryStream stream = new MemoryStream(buffer))
using (BinaryReader reader = new BinaryReader(stream))
{
byte unknown1 = reader.ReadByte(); // Version ?
short unknown2 = reader.ReadInt16(); // Size ?
bool isValue = false;
string fieldStr = string.Empty;
while (stream.Position != stream.Length)
{
byte descriptor = reader.ReadByte();
if (!isValue)
{
byte[] key = reader.ReadBytes(descriptor - 0xA0);
fieldStr = $" Key: {Encoding.ASCII.GetString(key)}";
isValue = true;
}
else
{
if (descriptor > 0xD0) // Int value.
{
if (descriptor - 0xD0 == 1)
{
fieldStr += $", Value: {BinaryPrimitives.ReverseEndianness(reader.ReadUInt16())}";
}
else if (descriptor - 0xD0 == 2)
{
fieldStr += $", Value: {BinaryPrimitives.ReverseEndianness(reader.ReadInt32())}";
}
else if (descriptor - 0xD0 == 4)
{
fieldStr += $", Value: {BinaryPrimitives.ReverseEndianness(reader.ReadInt64())}";
}
else
{
// Unknown.
break;
}
}
else if (descriptor > 0xA0 && descriptor < 0xD0) // String value, max size = 0x20 bytes ?
{
int size = descriptor - 0xA0;
string value = string.Empty;
byte[] rawValues = new byte[0];
for (int i = 0; i < size; i++)
{
byte chr = reader.ReadByte();
if (chr >= 0x20 && chr < 0x7f)
{
value += (char)chr;
}
else
{
Array.Resize(ref rawValues, rawValues.Length + 1);
rawValues[rawValues.Length - 1] = chr;
}
}
if (value != string.Empty)
{
fieldStr += $", Value: {value}";
}
// TODO(Ac_K): Determine why there are non-alphanumeric values sometimes.
if (rawValues.Length > 0)
{
fieldStr += $", RawValue: 0x{BitConverter.ToString(rawValues).Replace("-", "")}";
}
}
else // Byte value.
{
fieldStr += $", Value: {descriptor}";
}
sb.AppendLine(fieldStr);
isValue = false;
}
}
}
}
catch (Exception)
{
sb.AppendLine(" Error while parsing the report buffer.");
}
return sb.ToString();
}
}
}