private void ReceiveData(Object sender, DataReceivedEventArgs e)
{
_executor.Start(() => ReceiveData(e));
}
private void ReceiveData(DataReceivedEventArgs e)
{
IMessageDecoder decoder = Spec.NewMessageDecoder(e.Data);
if (decoder.IsRequest)
{
Request request;
try
{
request = decoder.DecodeRequest();
}
catch (Exception)
{
if (decoder.IsReply)
{
if (log.IsWarnEnabled)
log.Warn("Message format error caused by " + e.EndPoint);
}
else
{
// manually build RST from raw information
EmptyMessage rst = new EmptyMessage(MessageType.RST);
rst.Destination = e.EndPoint;
rst.ID = decoder.ID;
_channel.Send(Serialize(rst), rst.Destination);
if (log.IsWarnEnabled)
log.Warn("Message format error caused by " + e.EndPoint + " and reseted.");
}
return;
}
request.Source = e.EndPoint;
Exchange exchange = _matcher.ReceiveRequest(request);
if (exchange != null)
{
exchange.EndPoint = this;
_coapStack.ReceiveRequest(exchange, request);
}
}
else if (decoder.IsResponse)
{
Response response = decoder.DecodeResponse();
response.Source = e.EndPoint;
Exchange exchange = _matcher.ReceiveResponse(response);
if (exchange != null)
{
response.RTT = (DateTime.Now - exchange.Timestamp).TotalMilliseconds;
exchange.EndPoint = this;
_coapStack.ReceiveResponse(exchange, response);
}
else if (response.Type != MessageType.ACK)
{
if (log.IsDebugEnabled)
log.Debug("Rejecting unmatchable response from " + e.EndPoint);
Reject(response);
}
}
else if (decoder.IsEmpty)
{
EmptyMessage message = decoder.DecodeEmptyMessage();
message.Source = e.EndPoint;
// CoAP Ping
if (message.Type == MessageType.CON || message.Type == MessageType.NON)
{
if (log.IsDebugEnabled)
log.Debug("Responding to ping by " + e.EndPoint);
Reject(message);
}
else
{
Exchange exchange = _matcher.ReceiveEmptyMessage(message);
if (exchange != null)
{
exchange.EndPoint = this;
_coapStack.ReceiveEmptyMessage(exchange, message);
}
}
}
else if (log.IsDebugEnabled)
{
log.Debug("Silently ignoring non-CoAP message from " + e.EndPoint);
}
}
private void FireDataReceived(object sender, DataReceivedEventArgs e)
{
if (DataReceived != null)
DataReceived(this, e);
}