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using Microsoft.IO;
using Ryujinx.Common;
using Ryujinx.Common.Memory;
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.IO;
namespace Ryujinx.HLE.HOS.Ipc
{
class IpcMessage
{
public IpcMessageType Type { get; set; }
public IpcHandleDesc HandleDesc { get; set; }
public List<IpcPtrBuffDesc> PtrBuff { get; private set; }
public List<IpcBuffDesc> SendBuff { get; private set; }
public List<IpcBuffDesc> ReceiveBuff { get; private set; }
public List<IpcBuffDesc> ExchangeBuff { get; private set; }
public List<IpcRecvListBuffDesc> RecvListBuff { get; private set; }
public List<int> ObjectIds { get; private set; }
public byte[] RawData { get; set; }
public IpcMessage()
{
PtrBuff = new List<IpcPtrBuffDesc>(0);
SendBuff = new List<IpcBuffDesc>(0);
ReceiveBuff = new List<IpcBuffDesc>(0);
ExchangeBuff = new List<IpcBuffDesc>(0);
RecvListBuff = new List<IpcRecvListBuffDesc>(0);
ObjectIds = new List<int>(0);
}
public IpcMessage(ReadOnlySpan<byte> data, long cmdPtr)
{
using RecyclableMemoryStream ms = MemoryStreamManager.Shared.GetStream(data);
BinaryReader reader = new(ms);
int word0 = reader.ReadInt32();
int word1 = reader.ReadInt32();
Type = (IpcMessageType)(word0 & 0xffff);
int ptrBuffCount = (word0 >> 16) & 0xf;
int sendBuffCount = (word0 >> 20) & 0xf;
int recvBuffCount = (word0 >> 24) & 0xf;
int xchgBuffCount = (word0 >> 28) & 0xf;
int rawDataSize = (word1 >> 0) & 0x3ff;
int recvListFlags = (word1 >> 10) & 0xf;
bool hndDescEnable = ((word1 >> 31) & 0x1) != 0;
if (hndDescEnable)
{
HandleDesc = new IpcHandleDesc(reader);
}
PtrBuff = new List<IpcPtrBuffDesc>(ptrBuffCount);
for (int index = 0; index < ptrBuffCount; index++)
{
PtrBuff.Add(new IpcPtrBuffDesc(reader));
}
static List<IpcBuffDesc> ReadBuff(BinaryReader reader, int count)
{
List<IpcBuffDesc> buff = new(count);
for (int index = 0; index < count; index++)
{
buff.Add(new IpcBuffDesc(reader));
}
return buff;
}
SendBuff = ReadBuff(reader, sendBuffCount);
ReceiveBuff = ReadBuff(reader, recvBuffCount);
ExchangeBuff = ReadBuff(reader, xchgBuffCount);
rawDataSize *= 4;
long recvListPos = reader.BaseStream.Position + rawDataSize;
// Only CMIF has the padding requirements.
if (Type < IpcMessageType.TipcCloseSession)
{
long pad0 = GetPadSize16(reader.BaseStream.Position + cmdPtr);
if (rawDataSize != 0)
{
rawDataSize -= (int)pad0;
}
reader.BaseStream.Seek(pad0, SeekOrigin.Current);
}
int recvListCount = recvListFlags - 2;
if (recvListCount == 0)
{
recvListCount = 1;
}
else if (recvListCount < 0)
{
recvListCount = 0;
}
RawData = reader.ReadBytes(rawDataSize);
reader.BaseStream.Seek(recvListPos, SeekOrigin.Begin);
RecvListBuff = new List<IpcRecvListBuffDesc>(recvListCount);
for (int index = 0; index < recvListCount; index++)
{
RecvListBuff.Add(new IpcRecvListBuffDesc(reader.ReadUInt64()));
}
ObjectIds = new List<int>(0);
}
public RecyclableMemoryStream GetStream(long cmdPtr, ulong recvListAddr)
{
RecyclableMemoryStream ms = MemoryStreamManager.Shared.GetStream();
int word0;
int word1;
word0 = (int)Type;
word0 |= (PtrBuff.Count & 0xf) << 16;
word0 |= (SendBuff.Count & 0xf) << 20;
word0 |= (ReceiveBuff.Count & 0xf) << 24;
word0 |= (ExchangeBuff.Count & 0xf) << 28;
using RecyclableMemoryStream handleDataStream = HandleDesc?.GetStream();
int dataLength = RawData?.Length ?? 0;
dataLength = (dataLength + 3) & ~3;
int rawLength = dataLength;
int pad0 = (int)GetPadSize16(cmdPtr + 8 + (handleDataStream?.Length ?? 0) + PtrBuff.Count * 8);
// Apparently, padding after Raw Data is 16 bytes, however when there is
// padding before Raw Data too, we need to subtract the size of this padding.
// This is the weirdest padding I've seen so far...
int pad1 = 0x10 - pad0;
dataLength = (dataLength + pad0 + pad1) / 4;
word1 = (dataLength & 0x3ff) | (2 << 10);
if (HandleDesc != null)
{
word1 |= 1 << 31;
}
ms.Write(word0);
ms.Write(word1);
if (handleDataStream != null)
{
ms.Write(handleDataStream);
}
foreach (IpcPtrBuffDesc ptrBuffDesc in PtrBuff)
{
ms.Write(ptrBuffDesc.GetWord0());
ms.Write(ptrBuffDesc.GetWord1());
}
ms.WriteByte(0, pad0);
if (RawData != null)
{
ms.Write(RawData);
ms.WriteByte(0, rawLength - RawData.Length);
}
ms.WriteByte(0, pad1);
ms.Write(recvListAddr);
ms.Position = 0;
return ms;
}
public RecyclableMemoryStream GetStreamTipc()
{
Debug.Assert(PtrBuff.Count == 0);
RecyclableMemoryStream ms = MemoryStreamManager.Shared.GetStream();
int word0;
int word1;
word0 = (int)Type;
word0 |= (SendBuff.Count & 0xf) << 20;
word0 |= (ReceiveBuff.Count & 0xf) << 24;
word0 |= (ExchangeBuff.Count & 0xf) << 28;
using RecyclableMemoryStream handleDataStream = HandleDesc?.GetStream();
int dataLength = RawData?.Length ?? 0;
dataLength = ((dataLength + 3) & ~3) / 4;
word1 = (dataLength & 0x3ff);
if (HandleDesc != null)
{
word1 |= 1 << 31;
}
ms.Write(word0);
ms.Write(word1);
if (handleDataStream != null)
{
ms.Write(handleDataStream);
}
if (RawData != null)
{
ms.Write(RawData);
}
return ms;
}
private static long GetPadSize16(long position)
{
if ((position & 0xf) != 0)
{
return 0x10 - (position & 0xf);
}
return 0;
}
// ReSharper disable once InconsistentNaming
public (ulong Position, ulong Size) GetBufferType0x21(int index = 0)
{
if (PtrBuff.Count > index && PtrBuff[index].Position != 0)
{
return (PtrBuff[index].Position, PtrBuff[index].Size);
}
if (SendBuff.Count > index)
{
return (SendBuff[index].Position, SendBuff[index].Size);
}
return (0, 0);
}
// ReSharper disable once InconsistentNaming
public (ulong Position, ulong Size) GetBufferType0x22(int index = 0)
{
if (RecvListBuff.Count > index && RecvListBuff[index].Position != 0)
{
return (RecvListBuff[index].Position, RecvListBuff[index].Size);
}
if (ReceiveBuff.Count > index)
{
return (ReceiveBuff[index].Position, ReceiveBuff[index].Size);
}
return (0, 0);
}
}
}
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