private void CalcHeaderCrc(ref GamePackHeader header, byte[] dst)
{
int headerCrcSize = Marshal.SizeOf(header.headerCrc32);
int sz = Marshal.SizeOf(header) - headerCrcSize;
mCrc.Crc(dst, headerCrcSize, sz);
header.headerCrc32 = (uint)mCrc.Value;
byte[] crc = BitConverter.GetBytes(header.headerCrc32);
Buffer.BlockCopy(crc, 0, dst, 0, crc.Length);
}
/// <summary>
/// 消息分发
/// </summary>
/// <param name="packet"></param>
private void OnPacketDistributeEvt(GamePacket packet)
{
//校验crc
//headcrc和datacrc都需要校验 TODO
//这里对datacrc校验一下
byte[] data = packet.data;
mCrc.Crc(data);
uint dataCrc = (uint)mCrc.Value;
if (packet.header.dataCrc32 == dataCrc)
{
ByteBuffer buffer = new ByteBuffer();
buffer.WriteBytes(packet.data);
KeyValuePair <int, ByteBuffer> _event = new KeyValuePair <int, ByteBuffer>(packet.header.header, buffer);
//facade.SendMessageCommand(NotiConst.DISPATCH_MESSAGE, _event);
}
else
{
Debug.LogError("发送方，接收方 的数据不一致");
//抛弃还是重新请求？TODO
}
}
public bool Send(string ip, int port, byte[] buf, int packetHandle, int bufSize = -1)
{
if (string.IsNullOrEmpty(ip) || port <= 0)
{
return(false);
}
if (bufSize < 0 && buf != null)
{
bufSize = buf.Length;
}
bool hasBufData = (buf != null) && (bufSize > 0);
GamePackHeader header = new GamePackHeader();
if (hasBufData)
{
header.dataSize = bufSize;
}
else
{
header.dataSize = 0;
}
header.header = packetHandle;
if (hasBufData)
{
mCrc.Crc(buf, bufSize);
header.dataCrc32 = (uint)mCrc.Value;
}
else
{
header.dataCrc32 = 0;
}
int headerSize = Marshal.SizeOf(header);
int dstSize = headerSize;
if (hasBufData)
{
dstSize += bufSize;
}
// 下面注释是未优化代码
//byte[] dstBuffer = new byte[dstSize];
// 此处已优化
var dstStream = NetByteArrayPool.GetByteBufferNode(dstSize);
try
{
byte[] dstBuffer = dstStream.GetBuffer();
// 此处可优化，可以考虑后续使用RINGBUF优化，RINGBUF用完可以自动关闭掉连接
IntPtr pStruct = Marshal.AllocHGlobal(headerSize);
try
{
Marshal.StructureToPtr(header, pStruct, false);
Marshal.Copy(pStruct, dstBuffer, 0, headerSize);
#if USE_NETORDER
// Calc header Crc
CalcHeaderCrc(ref header, dstBuffer);
// used net
header.headerCrc32 = (uint)IPAddress.HostToNetworkOrder(header.headerCrc32);
header.dataCrc32 = (uint)IPAddress.HostToNetworkOrder(header.dataCrc32);
header.header = IPAddress.HostToNetworkOrder(header.header);
header.dataSize = IPAddress.HostToNetworkOrder(header.dataSize);
Marshal.StructureToPtr(header, pStruct, false);
Marshal.Copy(pStruct, dstBuffer, 0, headerSize);
#endif
}
finally
{
Marshal.FreeHGlobal(pStruct);
}
#if USE_NETORDER
#else
// Calc header Crc
// CalcHeaderCrc(ref header, dstBuffer);
#endif
if (hasBufData)
{
Buffer.BlockCopy(buf, 0, dstBuffer, headerSize, bufSize);
}
return(SendBuf(ip, port, dstBuffer, dstSize));
}
finally
{
if (dstStream != null)
{
dstStream.Dispose();
dstStream = null;
}
}
}