//returns false if the message was dropped because the max pending message count was hit.
bool IUdpReceiveHandler.HandleDataReceived(ArraySegment <byte> data, EndPoint remoteEndpoint, int interfaceIndex, Action onMessageDequeuedCallback)
{
BufferManager localBufferManager = this.bufferManager;
bool returnBuffer = true;
string messageHash = null;
Message message = null;
bool continueReceiving = true;
try
{
IPEndPoint remoteIPEndPoint = (IPEndPoint)remoteEndpoint;
if (localBufferManager != null)
{
message = UdpUtility.DecodeMessage(this.duplicateDetector, this.messageEncoderFactory.Encoder,
localBufferManager, data, remoteIPEndPoint, interfaceIndex, true, out messageHash);
if (message != null)
{
// We pass in the length of the message buffer instead of the length of the message to keep track of the amount of memory that's been allocated
continueReceiving = Dispatch(message, data.Array.Length, onMessageDequeuedCallback);
returnBuffer = !continueReceiving;
}
}
else
{
Fx.Assert(this.State != CommunicationState.Opened, "buffer manager should only be null when closing down and the channel instance has taken control of the receive manager.");
IUdpReceiveHandler receiveHandler = (IUdpReceiveHandler)this.channelInstance;
if (receiveHandler != null)
{
returnBuffer = false; //let the channel instance take care of the buffer
continueReceiving = receiveHandler.HandleDataReceived(data, remoteEndpoint, interfaceIndex, onMessageDequeuedCallback);
}
else
{
//both channel and listener are shutting down, so drop the message and stop the receive loop
continueReceiving = false;
}
}
}
catch (Exception e)
{
if (Fx.IsFatal(e))
{
returnBuffer = false;
throw;
}
HandleReceiveException(e);
}
finally
{
if (returnBuffer)
{
if (message != null)
{
if (this.duplicateDetector != null)
{
Fx.Assert(messageHash != null, "message hash should always be available if duplicate detector is enabled");
this.duplicateDetector.RemoveEntry(messageHash);
}
message.Close(); // implicitly returns the buffer
}
else
{
// CSDMain 238600. Both channel and listener are shutting down. There's a race condition happening here
// and the bufferManager is not available at this moment. The data buffer ignored here might introduce
// an issue with buffer manager, but given that we are in the shutting down case here, it should not be a
// big problem.
if (localBufferManager != null)
{
localBufferManager.ReturnBuffer(data.Array);
}
}
}
}
return(continueReceiving);
}
// returns false if the message was dropped because the max pending message count was hit.
bool IUdpReceiveHandler.HandleDataReceived(ArraySegment <byte> data, EndPoint remoteEndpoint, int interfaceIndex, Action onMessageDequeuedCallback)
{
bool returnBuffer = true;
string messageHash = null;
Message message = null;
bool continueReceiving = true;
try
{
IPEndPoint remoteIPEndPoint = (IPEndPoint)remoteEndpoint;
message = UdpUtility.DecodeMessage(
this.DuplicateDetector,
this.Encoder,
this.BufferManager,
data,
remoteIPEndPoint,
interfaceIndex,
this.IgnoreSerializationException,
out messageHash);
if (message != null)
{
// We pass in the length of the message buffer instead of the length of the message to keep track of the amount of memory that's been allocated
continueReceiving = this.EnqueueMessage(message, data.Array.Length, onMessageDequeuedCallback);
returnBuffer = !continueReceiving;
}
}
catch (Exception e)
{
if (Fx.IsFatal(e))
{
returnBuffer = false;
throw;
}
this.HandleReceiveException(e);
}
finally
{
if (returnBuffer)
{
if (message != null)
{
if (this.DuplicateDetector != null)
{
Fx.Assert(messageHash != null, "message hash should always be available if duplicate detector is enabled");
this.DuplicateDetector.RemoveEntry(messageHash);
}
message.Close(); // implicitly returns the buffer
}
else
{
this.BufferManager.ReturnBuffer(data.Array);
}
}
}
return(continueReceiving);
}