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ryujinx-final/Ryujinx.HLE/HOS/Ipc/IpcMessage.cs

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using System.Collections.Generic;
using System.IO;
namespace Ryujinx.HLE.HOS.Ipc
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{
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; }
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public List<int> ObjectIds { get; private set; }
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public byte[] RawData { get; set; }
public IpcMessage()
{
PtrBuff = new List<IpcPtrBuffDesc>();
SendBuff = new List<IpcBuffDesc>();
ReceiveBuff = new List<IpcBuffDesc>();
ExchangeBuff = new List<IpcBuffDesc>();
RecvListBuff = new List<IpcRecvListBuffDesc>();
ObjectIds = new List<int>();
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}
public IpcMessage(byte[] data, long cmdPtr) : this()
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{
using (MemoryStream ms = new MemoryStream(data))
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{
BinaryReader reader = new BinaryReader(ms);
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Initialize(reader, cmdPtr);
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}
}
private void Initialize(BinaryReader reader, long cmdPtr)
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{
int word0 = reader.ReadInt32();
int word1 = reader.ReadInt32();
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Type = (IpcMessageType)(word0 & 0xffff);
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int ptrBuffCount = (word0 >> 16) & 0xf;
int sendBuffCount = (word0 >> 20) & 0xf;
int recvBuffCount = (word0 >> 24) & 0xf;
int xchgBuffCount = (word0 >> 28) & 0xf;
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int rawDataSize = (word1 >> 0) & 0x3ff;
int recvListFlags = (word1 >> 10) & 0xf;
bool hndDescEnable = ((word1 >> 31) & 0x1) != 0;
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if (hndDescEnable)
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{
HandleDesc = new IpcHandleDesc(reader);
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}
for (int index = 0; index < ptrBuffCount; index++)
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{
PtrBuff.Add(new IpcPtrBuffDesc(reader));
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}
void ReadBuff(List<IpcBuffDesc> buff, int count)
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{
for (int index = 0; index < count; index++)
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{
buff.Add(new IpcBuffDesc(reader));
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}
}
ReadBuff(SendBuff, sendBuffCount);
ReadBuff(ReceiveBuff, recvBuffCount);
ReadBuff(ExchangeBuff, xchgBuffCount);
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rawDataSize *= 4;
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long recvListPos = reader.BaseStream.Position + rawDataSize;
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// only HIPC have 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);
}
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int recvListCount = recvListFlags - 2;
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if (recvListCount == 0)
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{
recvListCount = 1;
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}
else if (recvListCount < 0)
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{
recvListCount = 0;
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}
RawData = reader.ReadBytes(rawDataSize);
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reader.BaseStream.Seek(recvListPos, SeekOrigin.Begin);
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for (int index = 0; index < recvListCount; index++)
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{
RecvListBuff.Add(new IpcRecvListBuffDesc(reader));
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}
}
public byte[] GetBytes(long cmdPtr, ulong recvListAddr)
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{
using (MemoryStream ms = new MemoryStream())
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{
BinaryWriter writer = new BinaryWriter(ms);
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int word0;
int word1;
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word0 = (int)Type;
word0 |= (PtrBuff.Count & 0xf) << 16;
word0 |= (SendBuff.Count & 0xf) << 20;
word0 |= (ReceiveBuff.Count & 0xf) << 24;
word0 |= (ExchangeBuff.Count & 0xf) << 28;
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byte[] handleData = new byte[0];
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if (HandleDesc != null)
{
handleData = HandleDesc.GetBytes();
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}
int dataLength = RawData?.Length ?? 0;
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dataLength = (dataLength + 3) & ~3;
int rawLength = dataLength;
int pad0 = (int)GetPadSize16(cmdPtr + 8 + handleData.Length + PtrBuff.Count * 8);
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// 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;
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dataLength = (dataLength + pad0 + pad1) / 4;
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word1 = (dataLength & 0x3ff) | (2 << 10);
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if (HandleDesc != null)
{
word1 |= 1 << 31;
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}
writer.Write(word0);
writer.Write(word1);
writer.Write(handleData);
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for (int index = 0; index < PtrBuff.Count; index++)
{
writer.Write(PtrBuff[index].GetWord0());
writer.Write(PtrBuff[index].GetWord1());
}
ms.Seek(pad0, SeekOrigin.Current);
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if (RawData != null)
{
writer.Write(RawData);
ms.Seek(rawLength - RawData.Length, SeekOrigin.Current);
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}
writer.Write(new byte[pad1]);
writer.Write(recvListAddr);
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return ms.ToArray();
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}
}
private long GetPadSize16(long position)
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{
if ((position & 0xf) != 0)
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{
return 0x10 - (position & 0xf);
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}
return 0;
}
// ReSharper disable once InconsistentNaming
public (long Position, long Size) GetBufferType0x21(int index = 0)
{
if (PtrBuff.Count > index &&
PtrBuff[index].Position != 0 &&
PtrBuff[index].Size != 0)
{
return (PtrBuff[index].Position, PtrBuff[index].Size);
}
if (SendBuff.Count > index &&
SendBuff[index].Position != 0 &&
SendBuff[index].Size != 0)
{
return (SendBuff[index].Position, SendBuff[index].Size);
}
return (0, 0);
}
// ReSharper disable once InconsistentNaming
public (long Position, long Size) GetBufferType0x22(int index = 0)
{
if (RecvListBuff.Count > index &&
RecvListBuff[index].Position != 0 &&
RecvListBuff[index].Size != 0)
{
return (RecvListBuff[index].Position, RecvListBuff[index].Size);
}
if (ReceiveBuff.Count > index &&
ReceiveBuff[index].Position != 0 &&
ReceiveBuff[index].Size != 0)
{
return (ReceiveBuff[index].Position, ReceiveBuff[index].Size);
}
return (0, 0);
}
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}
}