public void PacketReceived(CoapMessage message)
{
CoapType type = message.CoapType;
if ((message.CoapCode == CoapCode.POST || message.CoapCode == CoapCode.PUT) && type != CoapType.ACKNOWLEDGEMENT)
{
String topic = null;
QOS qos = QOS.AT_MOST_ONCE;
foreach (CoapOption option in message.Options)
{
if (option.Number == (int)CoapOptionType.URI_PATH)
{
topic = Encoding.UTF8.GetString(option.Value);
}
else if (option.Number == (int)CoapOptionType.ACCEPT)
{
qos = (QOS)option.Value[option.Value.Length - 1];
}
}
if (topic == null)
{
List <CoapOption> options = new List <CoapOption>();
byte[] textBytes = Encoding.UTF8.GetBytes("text/plain");
options.Add(new CoapOption((int)CoapOptionType.CONTENT_FORMAT, textBytes.Length, textBytes));
byte[] nodeIdBytes = Encoding.UTF8.GetBytes(_clientID);
options.Add(new CoapOption((int)CoapOptionType.NODE_ID, nodeIdBytes.Length, nodeIdBytes));
CoapMessage ack = new CoapMessage(VERSION, CoapType.ACKNOWLEDGEMENT, CoapCode.BAD_OPTION, message.MessageID, message.Token, options, new byte[0]);
_client.Send(ack);
return;
}
byte[] content = message.Payload;
_dbInterface.StoreMessage(topic, content, 0);
if (_listener != null)
{
_listener.MessageReceived(MessageType.PUBLISH);
}
}
switch (type)
{
case CoapType.CONFIRMABLE:
{
List <CoapOption> options = new List <CoapOption>();
byte[] nodeIdBytes = Encoding.UTF8.GetBytes(_clientID);
options.Add(new CoapOption((int)CoapOptionType.NODE_ID, nodeIdBytes.Length, nodeIdBytes));
CoapMessage ack = new CoapMessage(message.Version, CoapType.ACKNOWLEDGEMENT, message.CoapCode, message.MessageID, message.Token, options, new byte[0]);
_client.Send(ack);
}
break;
case CoapType.NON_CONFIRMABLE:
{
_timers.Remove(message.Token);
}
break;
case CoapType.ACKNOWLEDGEMENT:
{
if (message.CoapCode == CoapCode.GET)
{
Boolean?observe = null;
QOS qos = QOS.AT_MOST_ONCE;
foreach (CoapOption option in message.Options)
{
if (option.Number == (int)CoapOptionType.OBSERVE && option.Value.Length > 0)
{
if (option.Value[option.Value.Length - 1] == 0x00)
{
observe = false;
}
else
{
observe = true;
}
}
else if (option.Number == (int)CoapOptionType.ACCEPT)
{
if (option.Value[option.Value.Length - 1] == 0)
{
qos = QOS.AT_LEAST_ONCE;
}
}
}
if (observe.HasValue)
{
if (!observe.Value)
{
CoapMessage originalMessage = _timers.Remove(message.Token);
if (originalMessage != null)
{
List <String> topics = new List <String>();
foreach (CoapOption option in originalMessage.Options)
{
if (option.Number == (int)CoapOptionType.URI_PATH)
{
topics.Add(Encoding.UTF8.GetString(option.Value));
}
}
for (int i = 0; i < topics.Count; i++)
{
_dbInterface.StoreTopic(topics[i], qos);
}
if (_listener != null)
{
_listener.MessageReceived(MessageType.SUBACK);
}
}
}
else
{
CoapMessage originalMessage = _timers.Remove(message.Token);
if (originalMessage != null)
{
List <String> topics = new List <String>();
foreach (CoapOption option in originalMessage.Options)
{
if (option.Number == (int)CoapOptionType.URI_PATH)
{
topics.Add(Encoding.UTF8.GetString(option.Value));
}
}
for (int i = 0; i < topics.Count; i++)
{
_dbInterface.DeleteTopic(topics[i]);
}
}
if (_listener != null)
{
_listener.MessageReceived(MessageType.UNSUBACK);
}
}
}
}
else
{
_timers.Remove(message.Token);
if (_listener != null)
{
_listener.MessageReceived(MessageType.PUBACK);
}
}
}
break;
case CoapType.RESET:
{
_timers.Remove(message.Token);
}
break;
}
}
