protected void readDataPacket(SocketAsyncEventArgs args)
{
ReceiveUserToken token = (ReceiveUserToken)args.UserToken;
bool bDataPacketReaded = false;
int nProcessedDataCount = 0;
IDataPacketHeader dph = _dataProcessor.CreateDataPacketHeader();
IDataPacket dp = _dataProcessor.CreateDataPacket();
if (!token.IsHeaderReaded)
{
if (args.BytesTransferred >= _nPacketHeaderSize)
{
if (args.Buffer != null)
{
byte[] newdata = new byte[args.Count];
Buffer.BlockCopy(args.Buffer, args.Offset, newdata, 0, args.Count);
dph.Deserialize(newdata);
if (_dataProcessor.IsValidHeader(dph))
{
token.IsHeaderReaded = true;
token.ProcessedDataCount += _nPacketHeaderSize;
nProcessedDataCount += _nPacketHeaderSize;
token.DataPacketHeader = dph;
}
}
}
}
else
{
dph = token.DataPacketHeader;
}
if (token.IsHeaderReaded)
{
if (args.BytesTransferred >= token.ProcessedDataCount + dph.DataPacketSize)
{
if (args.Buffer != null)
{
byte[] buffer = new byte[dph.DataPacketSize];
Buffer.BlockCopy(args.Buffer, args.Offset + _dataProcessor.DataPacketHeaderSize, buffer, 0,
dph.DataPacketSize);
dp.Deserialize(buffer);
bDataPacketReaded = true;
}
}
else
{
if (args.Buffer != null)
{
if (token.ReadData == null)
{
byte[] buffer = new byte[dph.DataPacketSize];
token.ReadData = buffer;
}
int nCount = args.BytesTransferred - nProcessedDataCount;
nCount = nCount > (dph.DataPacketSize - token.ReadDataOffset)
? dph.DataPacketSize - token.ReadDataOffset
: nCount;
Buffer.BlockCopy(args.Buffer, args.Offset + nProcessedDataCount, token.ReadData,
token.ReadDataOffset, nCount);
token.ReadDataOffset += args.BytesTransferred - nProcessedDataCount;
token.ProcessedDataCount += args.BytesTransferred - nProcessedDataCount;
if (token.ProcessedDataCount >= dph.DataPacketSize + _nPacketHeaderSize)
{
dp.Deserialize(token.ReadData);
bDataPacketReaded = true;
}
}
}
}
if (bDataPacketReaded)
{
token.Reset();
onDataPacketReaded(args, dp);
}
}
