/// <summary>
/// Initializes a new instance of the <see cref="LoRaPayload"/> class.
/// Constructor used by the simulator
/// </summary>
public static bool TryCreateLoRaPayloadForSimulator(Txpk txpk, string appKey, out LoRaPayload loRaPayload)
{
if (txpk.Data != null)
{
byte[] convertedInputMessage = Convert.FromBase64String(txpk.Data);
switch ((LoRaMessageType)convertedInputMessage[0])
{
case LoRaMessageType.JoinRequest:
loRaPayload = new LoRaPayloadJoinRequest();
return(true);
case LoRaMessageType.JoinAccept:
loRaPayload = new LoRaPayloadJoinAccept(convertedInputMessage, appKey);
return(true);
case LoRaMessageType.UnconfirmedDataDown:
case LoRaMessageType.UnconfirmedDataUp:
case LoRaMessageType.ConfirmedDataUp:
case LoRaMessageType.ConfirmedDataDown:
loRaPayload = new LoRaPayloadData();
return(true);
}
}
loRaPayload = null;
return(false);
}
public void JoinRequest_Should_Succeed_Mic_Check()
{
var appEUIText = "0005100000000004";
var appEUIBytes = ConversionHelper.StringToByteArray(appEUIText);
var devEUIText = "0005100000000004";
var devEUIBytes = ConversionHelper.StringToByteArray(devEUIText);
var devNonceText = "ABCD";
var devNonceBytes = ConversionHelper.StringToByteArray(devNonceText);
var appKey = "00000000000000000005100000000004";
var joinRequest = new LoRaPayloadJoinRequest(appEUIText, devEUIText, devNonceBytes);
joinRequest.SetMic(appKey);
Assert.True(joinRequest.CheckMic(appKey));
Assert.True(joinRequest.CheckMic(appKey)); // ensure multiple calls work!
var rxpk = new LoRaTools.LoRaPhysical.Rxpk()
{
Chan = 7,
Rfch = 1,
Freq = 903.700000,
Stat = 1,
Modu = "LORA",
Datr = "SF10BW125",
Codr = "4/5",
Rssi = -17,
Lsnr = 12.0f,
};
var data = joinRequest.GetByteMessage();
rxpk.Data = Convert.ToBase64String(data);
rxpk.Size = (uint)data.Length;
byte[] decodedJoinRequestBytes = Convert.FromBase64String(rxpk.Data);
var decodedJoinRequest = new LoRaTools.LoRaMessage.LoRaPayloadJoinRequest(decodedJoinRequestBytes);
Assert.True(decodedJoinRequest.CheckMic(appKey));
}
public static bool TryCreateLoRaPayload(Rxpk rxpk, out LoRaPayload loRaPayloadMessage)
{
byte[] convertedInputMessage = Convert.FromBase64String(rxpk.Data);
var messageType = convertedInputMessage[0];
switch (messageType)
{
case (int)LoRaMessageType.UnconfirmedDataUp:
case (int)LoRaMessageType.ConfirmedDataUp:
loRaPayloadMessage = new LoRaPayloadData(convertedInputMessage);
break;
case (int)LoRaMessageType.JoinRequest:
loRaPayloadMessage = new LoRaPayloadJoinRequest(convertedInputMessage);
break;
default:
loRaPayloadMessage = null;
return(false);
}
loRaPayloadMessage.LoRaMessageType = (LoRaMessageType)messageType;
return(true);
}
/// <summary>
/// This contructor is used in case of uplink message, hence we don't know the message type yet
/// </summary>
/// <param name="inputMessage"></param>
public LoRaMessageWrapper(byte[] inputMessage, bool server = false, string AppKey = "")
{
// packet normally sent by the gateway as heartbeat. TODO find more elegant way to integrate.
PhysicalPayload = new PhysicalPayload(inputMessage, server);
if (PhysicalPayload.message != null)
{
var payload = Encoding.Default.GetString(PhysicalPayload.message);
// todo ronnie implement a better logging by message type
if (!payload.StartsWith("{\"stat"))
{
Logger.Log($"Physical dataUp {payload}", Logger.LoggingLevel.Full);
// Deserialized for uplink messages
var payloadObject = JsonConvert.DeserializeObject <UplinkPktFwdMessage>(payload);
PktFwdPayload = payloadObject;
// set up the parts of the raw message
// status message
if (PktFwdPayload != null)
{
// if there is no packet, then it maybe a downlink message
if (PktFwdPayload.GetPktFwdMessage().Rxpks.Count > 0)
{
if (PktFwdPayload.GetPktFwdMessage().Rxpks[0].data != null)
{
byte[] convertedInputMessage = Convert.FromBase64String(PktFwdPayload.GetPktFwdMessage().Rxpks[0].data);
var messageType = convertedInputMessage[0] >> 5;
LoRaMessageType = (LoRaMessageType)messageType;
// Uplink Message
if (messageType == (int)LoRaMessageType.UnconfirmedDataUp)
{
LoRaPayloadMessage = new LoRaPayloadData(convertedInputMessage);
}
else if (messageType == (int)LoRaMessageType.ConfirmedDataUp)
{
LoRaPayloadMessage = new LoRaPayloadData(convertedInputMessage);
}
else if (messageType == (int)LoRaMessageType.JoinRequest)
{
LoRaPayloadMessage = new LoRaPayloadJoinRequest(convertedInputMessage);
}
IsLoRaMessage = true;
}
}
else
{
// deselrialize for a downlink message
var payloadDownObject = JsonConvert.DeserializeObject <DownlinkPktFwdMessage>(payload);
if (payloadDownObject != null)
{
if (payloadDownObject.txpk != null)
{
// if we have data, it is a downlink message
if (payloadDownObject.txpk.data != null)
{
byte[] convertedInputMessage = Convert.FromBase64String(payloadDownObject.txpk.data);
var messageType = convertedInputMessage[0] >> 5;
LoRaMessageType = (LoRaMessageType)messageType;
if (messageType == (int)LoRaMessageType.JoinAccept)
{
LoRaPayloadMessage = new LoRaPayloadJoinAccept(convertedInputMessage, AppKey);
}
IsLoRaMessage = true;
}
}
else
{
Logger.Log("Error: " + payload, Logger.LoggingLevel.Full);
}
}
}
}
}
else
{
Logger.Log($"Statistic: {payload}", Logger.LoggingLevel.Full);
IsLoRaMessage = false;
}
}
else
{
IsLoRaMessage = false;
}
}