protected void sendDataPacket(SocketAsyncEventArgs sendArgs)
{
SendUserToken token = (SendUserToken)sendArgs.UserToken;
if (token.DataToSend == null)
{
IDataPacket dp = token.DataPacket;
byte[] dataBuffer = dp.Serialize();
IDataPacketHeader dph = _dataProcessor.CreateDataPacketHeader();
dph.DataPacketSize = dataBuffer.Length;
byte[] headerBuffer = dph.Serialize();
int nSize = dataBuffer.Length + headerBuffer.Length;
byte[] packetBuffer = new byte[nSize];
Buffer.BlockCopy(headerBuffer, 0, packetBuffer, 0, headerBuffer.Length);
Buffer.BlockCopy(dataBuffer, 0, packetBuffer, headerBuffer.Length, dataBuffer.Length);
token.DataToSend = packetBuffer;
token.SentDataOffset = 0;
token.ProcessedDataRemains = packetBuffer.Length;
}
if (token.ProcessedDataRemains <= nBufferSize && token.SentDataOffset == 0) //data packet fully fit in send buffer
{
Buffer.BlockCopy(token.DataToSend, 0, sendArgs.Buffer, sendArgs.Offset, token.DataToSend.Length);
token.Reset();
}
else
{// need to separate data packet into several buffers
int nLength = token.ProcessedDataRemains <= nBufferSize ? token.ProcessedDataRemains : nBufferSize;
Buffer.BlockCopy(token.DataToSend, token.SentDataOffset, sendArgs.Buffer,
sendArgs.Offset, nLength);
token.SentDataOffset += nLength;
token.ProcessedDataRemains -= nLength;
if (token.ProcessedDataRemains == 0)
{
token.Reset();
}
}
byte[] testByte2 = new byte[nBufferSize];
Buffer.BlockCopy(sendArgs.Buffer, sendArgs.Offset, testByte2, 0, nBufferSize);
string strOut = Encoding.UTF8.GetString(testByte2);
Debug.WriteLine("Send = {0}", strOut);
if (!sendArgs.AcceptSocket.SendAsync(sendArgs))
{
sendArgs_Completed(sendArgs.AcceptSocket, sendArgs);
}
}
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);
}
}
public bool IsValidHeader(IDataPacketHeader header)
{
DataPacketHeader dph = (DataPacketHeader)header;
return(dph.MagicKey == NMagicKey && dph.Version == NVersion);
}