internal static uint ProcessExistingDeviceInfo(LoRaDeviceCache deviceCache, DeviceCacheInfo cachedDeviceState, string gatewayId, uint clientFCntUp, uint clientFCntDown)
{
uint newFCntDown = 0;
if (cachedDeviceState != null)
{
// we have a state in the cache matching this device and now we own the lock
if (clientFCntUp > cachedDeviceState.FCntUp)
{
// it is a new message coming up by the first gateway
if (clientFCntDown >= cachedDeviceState.FCntDown)
{
newFCntDown = clientFCntDown + 1;
}
else
{
newFCntDown = cachedDeviceState.FCntDown + 1;
}
cachedDeviceState.FCntUp = clientFCntUp;
cachedDeviceState.FCntDown = newFCntDown;
cachedDeviceState.GatewayId = gatewayId;
deviceCache.StoreInfo(cachedDeviceState);
}
else if (clientFCntUp == cachedDeviceState.FCntUp && gatewayId == cachedDeviceState.GatewayId)
{
// it is a retry message coming up by the same first gateway
newFCntDown = cachedDeviceState.FCntDown + 1;
cachedDeviceState.FCntDown = newFCntDown;
deviceCache.StoreInfo(cachedDeviceState);
}
}
return(newFCntDown);
}
