private bool Process(int serverSessionHandle, ulong recvListAddr)
{
KProcess process = KernelStatic.GetCurrentProcess();
KThread thread = KernelStatic.GetCurrentThread();
ulong messagePtr = thread.TlsAddress;
ulong messageSize = 0x100;
byte[] reqData = new byte[messageSize];
process.CpuMemory.Read(messagePtr, reqData);
IpcMessage request = new IpcMessage(reqData, (long)messagePtr);
IpcMessage response = new IpcMessage();
ulong tempAddr = recvListAddr;
int sizesOffset = request.RawData.Length - ((request.RecvListBuff.Count * 2 + 3) & ~3);
bool noReceive = true;
for (int i = 0; i < request.ReceiveBuff.Count; i++)
{
noReceive &= (request.ReceiveBuff[i].Position == 0);
}
if (noReceive)
{
for (int i = 0; i < request.RecvListBuff.Count; i++)
{
ulong size = (ulong)BinaryPrimitives.ReadInt16LittleEndian(request.RawData.AsSpan().Slice(sizesOffset + i * 2, 2));
response.PtrBuff.Add(new IpcPtrBuffDesc(tempAddr, (uint)i, size));
request.RecvListBuff[i] = new IpcRecvListBuffDesc(tempAddr, size);
tempAddr += size;
}
}
bool shouldReply = true;
bool isTipcCommunication = false;
using (MemoryStream raw = new MemoryStream(request.RawData))
{
BinaryReader reqReader = new BinaryReader(raw);
if (request.Type == IpcMessageType.HipcRequest ||
request.Type == IpcMessageType.HipcRequestWithContext)
{
response.Type = IpcMessageType.HipcResponse;
using (MemoryStream resMs = new MemoryStream())
{
BinaryWriter resWriter = new BinaryWriter(resMs);
ServiceCtx context = new ServiceCtx(
_context.Device,
process,
process.CpuMemory,
thread,
request,
response,
reqReader,
resWriter);
_sessions[serverSessionHandle].CallHipcMethod(context);
response.RawData = resMs.ToArray();
}
}
else if (request.Type == IpcMessageType.HipcControl ||
request.Type == IpcMessageType.HipcControlWithContext)
{
uint magic = (uint)reqReader.ReadUInt64();
uint cmdId = (uint)reqReader.ReadUInt64();
switch (cmdId)
{
case 0:
request = FillResponse(response, 0, _sessions[serverSessionHandle].ConvertToDomain());
break;
case 3:
request = FillResponse(response, 0, PointerBufferSize);
break;
// TODO: Whats the difference between IpcDuplicateSession/Ex?
case 2:
case 4:
int unknown = reqReader.ReadInt32();
_context.Syscall.CreateSession(false, 0, out int dupServerSessionHandle, out int dupClientSessionHandle);
AddSessionObj(dupServerSessionHandle, _sessions[serverSessionHandle]);
response.HandleDesc = IpcHandleDesc.MakeMove(dupClientSessionHandle);
request = FillResponse(response, 0);
break;
default: throw new NotImplementedException(cmdId.ToString());
}
}
else if (request.Type == IpcMessageType.HipcCloseSession || request.Type == IpcMessageType.TipcCloseSession)
{
_context.Syscall.CloseHandle(serverSessionHandle);
_sessionHandles.Remove(serverSessionHandle);
IpcService service = _sessions[serverSessionHandle];
if (service is IDisposable disposableObj)
{
disposableObj.Dispose();
}
_sessions.Remove(serverSessionHandle);
shouldReply = false;
}
// If the type is past 0xF, we are using TIPC
else if (request.Type > IpcMessageType.TipcCloseSession)
{
isTipcCommunication = true;
// Response type is always the same as request on TIPC.
response.Type = request.Type;
using (MemoryStream resMs = new MemoryStream())
{
BinaryWriter resWriter = new BinaryWriter(resMs);
ServiceCtx context = new ServiceCtx(
_context.Device,
process,
process.CpuMemory,
thread,
request,
response,
reqReader,
resWriter);
_sessions[serverSessionHandle].CallTipcMethod(context);
response.RawData = resMs.ToArray();
}
process.CpuMemory.Write(messagePtr, response.GetBytesTipc());
}
else
{
throw new NotImplementedException(request.Type.ToString());
}
if (!isTipcCommunication)
{
process.CpuMemory.Write(messagePtr, response.GetBytes((long)messagePtr, recvListAddr | ((ulong)PointerBufferSize << 48)));
}
return(shouldReply);
}
}