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);
}
}