public async Task <byte[]> ProcessUnconfirmedDataUp(byte[] data)
{
byte[] returnvalue = null;
var unconfirmeddataup = _lora.UnmarshalUnconfirmedDataUp(data);
var session = await _dal.GetSessionOnNwkIdNwkAddrActive(unconfirmeddataup.Fhdr.DevAddr.NwkId, unconfirmeddataup.Fhdr.DevAddr.NwkAddr);
var validatedunconfirmeddataup = _lora.UnmarshalUnconfirmedDataUpAndValidate(StringToByteArray(session.NwkSKey), data);
if (validatedunconfirmeddataup.FRMPayload != null)
{
if (validatedunconfirmeddataup.FPort > 0)
{
var value = _lora.DecryptFRMPayload(StringToByteArray(session.AppSKey), validatedunconfirmeddataup);
log.Info("Data received: " + System.Text.Encoding.Default.GetString(value));
}
}
return(returnvalue);
}
public async Task Process(UdpReceiveResult message, UdpClient client)
{
var now = DateTime.UtcNow;
try {
switch (_semtech.GetIdentifier(message.Buffer))
{
case Identifier.PUSH_DATA:
Log.Info(log, "PUSH_DATA from " + message.RemoteEndPoint.Address.ToString() + ":" + message.RemoteEndPoint.Port.ToString(), now);
var pushdata = _semtech.UnmarshalPushData(message.Buffer);
IPEndPoint ep = null;
Broker broker = null;
if (_gateways.TryGetValue(ByteArrayToString(pushdata.GatewayMACAddress), out ep))
{
var pushack = _semtech.MarshalPushAck(pushdata.RandomToken);
client.SendAsync(pushack, pushack.Length, ep);
Log.Info(log, "PUSH_ACK to " + ep.Address.ToString() + ":" + ep.Port.ToString(), now);
foreach (var rxpk in pushdata.Json.Rxpks)
{
var data = Convert.FromBase64String(rxpk.Data);
switch (_lora.GetMType(data[0]))
{
case MType.JoinRequest:
var joinrequest = _lora.UnmarshalJoinRequest(data);
broker = await _brokerclient.GetBrokerOnAppEUI(ByteArrayToString(joinrequest.AppEUI));
var joinaccept = await _brokerclient.SendMessage(broker.Endpoint, new Message()
{
Rxpk = rxpk
});
var pullresp = _semtech.MarshalPullResp(new PullResp()
{
ProtocolVersion = 1,
Identifier = Identifier.PULL_RESP,
Txpk = joinaccept.Txpk
});
client.SendAsync(pullresp, pullresp.Length, ep);
Log.Info(log, "PULL_RESP to " + ep.Address.ToString() + ":" + ep.Port.ToString(), now);
break;
case MType.ConfirmedDataUp:
// TODO
var confirmeddataup = _lora.UnmarshalUnconfirmedDataUp(data);
broker = await _brokerclient.GetBrokerOnDevAddr(ByteArrayToString(_lora.MarshalDevAddr(confirmeddataup.Fhdr.DevAddr)));
await _brokerclient.SendMessage(broker.Endpoint, new Message()
{
Rxpk = rxpk
});
break;
case MType.UnconfirmedDataUp:
var unconfirmeddataup = _lora.UnmarshalUnconfirmedDataUp(data);
broker = await _brokerclient.GetBrokerOnDevAddr(ByteArrayToString(_lora.MarshalDevAddr(unconfirmeddataup.Fhdr.DevAddr)));
await _brokerclient.SendMessage(broker.Endpoint, new Message()
{
Rxpk = rxpk
});
break;
}
}
}
break;
case Identifier.PULL_DATA:
Log.Info(log, "PULL_DATA from " + message.RemoteEndPoint.Address.ToString() + ":" + message.RemoteEndPoint.Port.ToString(), now);
var pulldata = _semtech.UnmarshalPullData(message.Buffer);
_gateways[ByteArrayToString(pulldata.GatewayMACAddress)] = message.RemoteEndPoint;
var pullack = _semtech.MarshalPullAck(pulldata.RandomToken);
client.SendAsync(pullack, pullack.Length, message.RemoteEndPoint);
Log.Info(log, "PULL_ACK to " + message.RemoteEndPoint.Address.ToString() + ":" + message.RemoteEndPoint.Port.ToString(), now);
break;
}
}
catch (Exception e) {
Log.Error(log, e.Message, now, e);
}
}
