private void ProcessReceivedData(ref MessageAccumulator msgAccumulator, byte[] rawData, int dataLength)
{
byte[] workingBuffer;
int readIndex;
//int newDataLength;
bool hasMoreData;
hasMoreData = false;
readIndex = 0;
do
{
workingBuffer = (msgAccumulator.Stage == MessageAccumulator.AccumatingStage.HEADER) ? msgAccumulator.Header : msgAccumulator.Payload;
int neededBytes = msgAccumulator.DesiredBytes - msgAccumulator.ReceivedBytes;
int bytesToCopy = (dataLength > neededBytes) ? neededBytes : dataLength;
Array.Copy(rawData, readIndex, workingBuffer, msgAccumulator.ReceivedBytes, bytesToCopy);
msgAccumulator.ReceivedBytes += bytesToCopy;
readIndex += bytesToCopy;
dataLength -= bytesToCopy;
hasMoreData = dataLength != 0;
if (msgAccumulator.ReceivedBytes == msgAccumulator.DesiredBytes)
{
if (msgAccumulator.Stage == MessageAccumulator.AccumatingStage.HEADER)
{
DecodeHeader(msgAccumulator.MessageHeader, msgAccumulator.Header);
msgAccumulator.Payload = new byte[msgAccumulator.MessageHeader.Length];
msgAccumulator.Stage = MessageAccumulator.AccumatingStage.BODY;
msgAccumulator.DesiredBytes = msgAccumulator.MessageHeader.Length;
msgAccumulator.ReceivedBytes = 0;
}
else
{
OnMessageReceived(msgAccumulator.MessageHeader.EncodingType, msgAccumulator.MessageHeader.EncodingVersion, msgAccumulator.Payload);
msgAccumulator = new MessageAccumulator();
}
}
} while (hasMoreData);
}
private void ReadCallback(IAsyncResult asyncResult)
{
try
{
ReadContext readContext = (ReadContext)asyncResult.AsyncState;
byte[] rawData = readContext.Data;
int bytesReceived = 0;
try
{
bytesReceived = ReadStream.EndRead(asyncResult);
}
catch (Exception)
{
bytesReceived = 0;
}
if (bytesReceived == 0)
{
// Read as failed (bytes received == 0 or exception in EndRead)
ReadFailed(readContext);
return;
}
MessageAccumulator msgAcc = readContext.Accumulator;
ProcessReceivedData(ref msgAcc, rawData, bytesReceived);
readContext.Accumulator = msgAcc;
//continue to read if it's not closed.
lock (this)
{
if (closed)
{
return;
}
}
ReadStream.BeginRead(readContext.Data, 0, readContext.Data.Length, new AsyncCallback(ReadCallback), readContext);
}
catch (Exception e)
{
log.Error(e);
}
}
public ReadContext(int dataBufferLength, long connectionVersion)
{
msgAccumulator = new MessageAccumulator();
rawData = new byte[dataBufferLength];
this.connectionVersion = connectionVersion;
}
private void ProcessReceivedData(ref MessageAccumulator msgAccumulator, byte[] rawData, int dataLength)
{
byte[] workingBuffer;
int readIndex;
//int newDataLength;
bool hasMoreData;
hasMoreData = false;
readIndex = 0;
do
{
workingBuffer = (msgAccumulator.Stage == MessageAccumulator.AccumatingStage.HEADER) ? msgAccumulator.Header : msgAccumulator.Payload;
int neededBytes = msgAccumulator.DesiredBytes - msgAccumulator.ReceivedBytes;
int bytesToCopy = (dataLength > neededBytes) ? neededBytes : dataLength;
Array.Copy(rawData, readIndex, workingBuffer, msgAccumulator.ReceivedBytes, bytesToCopy);
msgAccumulator.ReceivedBytes += bytesToCopy;
readIndex += bytesToCopy;
dataLength -= bytesToCopy;
hasMoreData = dataLength != 0;
if (msgAccumulator.ReceivedBytes == msgAccumulator.DesiredBytes)
{
if (msgAccumulator.Stage == MessageAccumulator.AccumatingStage.HEADER)
{
DecodeHeader(msgAccumulator.MessageHeader, msgAccumulator.Header);
msgAccumulator.Payload = new byte[msgAccumulator.MessageHeader.Length];
msgAccumulator.Stage = MessageAccumulator.AccumatingStage.BODY;
msgAccumulator.DesiredBytes = msgAccumulator.MessageHeader.Length;
msgAccumulator.ReceivedBytes = 0;
}
else
{
OnMessageReceived(msgAccumulator.MessageHeader.EncodingType, msgAccumulator.MessageHeader.EncodingVersion, msgAccumulator.Payload);
msgAccumulator = new MessageAccumulator();
}
}
} while (hasMoreData);
}
private void DecodeHeader(MessageAccumulator.DecodedMessageHeader decodedMessageHeader, byte[] encodedMessageHeader)
{
short protocolTypeNet = BitConverter.ToInt16(encodedMessageHeader, 0);
short protocolVerionNet = BitConverter.ToInt16(encodedMessageHeader, 2);
int messageLengthNet = BitConverter.ToInt32(encodedMessageHeader, 4);
decodedMessageHeader.EncodingType = IPAddress.NetworkToHostOrder(protocolTypeNet);
decodedMessageHeader.EncodingVersion = IPAddress.NetworkToHostOrder(protocolVerionNet);
decodedMessageHeader.Length = IPAddress.NetworkToHostOrder(messageLengthNet);
}
public ReadContext(int dataBufferLength, long connectionVersion)
{
msgAccumulator = new MessageAccumulator();
rawData = new byte[dataBufferLength];
this.connectionVersion = connectionVersion;
}
