private void TryProcessMessage(MqttClientConnection clientConnection, SocketAsyncEventArgs receiveSendEventArgs)
{
int lastProcessedByteByCompleteMessage = -1;
int remainingBytesToProcess = clientConnection.PreviouslyReceivedBytes + receiveSendEventArgs.BytesTransferred;
var bufferOffset = clientConnection.ReceiveSocketOffset;
while (remainingBytesToProcess > 0)
{
try
{
var messageType = GetMessageType(receiveSendEventArgs.Buffer, ref bufferOffset, ref remainingBytesToProcess);
var payloadLength = GetPayloadLength(receiveSendEventArgs.Buffer, ref bufferOffset, ref remainingBytesToProcess);
if (payloadLength <= remainingBytesToProcess)
{
var rawMessage = rawMessageManager.GetRawMessageWithData(clientConnection, messageType, receiveSendEventArgs.Buffer, bufferOffset, payloadLength);
clientConnection.EnqueueRawMessage(rawMessage);
bufferOffset += payloadLength;
remainingBytesToProcess -= payloadLength;
lastProcessedByteByCompleteMessage = bufferOffset - clientConnection.ReceiveSocketOffset;
}
else
{
throw new AggregateException();
}
}
catch (AggregateException)
{
var unprocessedStart = lastProcessedByteByCompleteMessage + 1;
var totalUnprocessedBytes = (clientConnection.PreviouslyReceivedBytes + receiveSendEventArgs.BytesTransferred) - unprocessedStart;
if (lastProcessedByteByCompleteMessage > 0)
{
Buffer.BlockCopy(receiveSendEventArgs.Buffer, clientConnection.ReceiveSocketOffset + unprocessedStart, receiveSendEventArgs.Buffer, clientConnection.ReceiveSocketOffset, totalUnprocessedBytes);
}
receiveSendEventArgs.SetBuffer(clientConnection.ReceiveSocketOffset + totalUnprocessedBytes, clientConnection.ReceiveSocketBufferSize - totalUnprocessedBytes);
clientConnection.PreviouslyReceivedBytes = totalUnprocessedBytes;
return;
}
}
receiveSendEventArgs.SetBuffer(clientConnection.ReceiveSocketOffset, clientConnection.ReceiveSocketBufferSize);
}