public uint GetNextFCntDown(string devEUI, string gatewayId, uint clientFCntUp, uint clientFCntDown)
{
uint newFCntDown = 0;
using (var deviceCache = new LoRaDeviceCache(this.deviceCache, devEUI, gatewayId))
{
if (deviceCache.TryToLock())
{
if (deviceCache.TryGetInfo(out DeviceCacheInfo serverStateForDeviceInfo))
{
newFCntDown = ProcessExistingDeviceInfo(deviceCache, serverStateForDeviceInfo, gatewayId, clientFCntUp, clientFCntDown);
}
else
{
var state = deviceCache.Initialize(clientFCntUp, clientFCntDown + 1);
newFCntDown = state.FCntDown;
}
}
}
return(newFCntDown);
}
public async Task <List <IoTHubDeviceInfo> > GetDeviceList(string devEUI, string gatewayId, string devNonce, string devAddr)
{
var results = new List <IoTHubDeviceInfo>();
if (devEUI != null)
{
// OTAA join
string cacheKey = devEUI + devNonce;
using (var deviceCache = new LoRaDeviceCache(this.cacheStore, devEUI, gatewayId, cacheKey))
{
if (deviceCache.HasValue())
{
throw new DeviceNonceUsedException();
}
if (deviceCache.TryToLock(cacheKey + "joinlock"))
{
if (deviceCache.HasValue())
{
throw new DeviceNonceUsedException();
}
deviceCache.SetValue(devNonce, TimeSpan.FromMinutes(1));
var device = await this.registryManager.GetDeviceAsync(devEUI);
if (device != null)
{
var iotHubDeviceInfo = new IoTHubDeviceInfo
{
DevEUI = devEUI,
PrimaryKey = device.Authentication.SymmetricKey.PrimaryKey
};
results.Add(iotHubDeviceInfo);
this.cacheStore.KeyDelete(devEUI);
}
}
else
{
throw new DeviceNonceUsedException();
}
}
}
else if (devAddr != null)
{
// ABP or normal message
// TODO check for sql injection
devAddr = devAddr.Replace('\'', ' ');
var query = this.registryManager.CreateQuery($"SELECT * FROM devices WHERE properties.desired.DevAddr = '{devAddr}' OR properties.reported.DevAddr ='{devAddr}'", 100);
while (query.HasMoreResults)
{
var page = await query.GetNextAsTwinAsync();
foreach (var twin in page)
{
if (twin.DeviceId != null)
{
var device = await this.registryManager.GetDeviceAsync(twin.DeviceId);
var iotHubDeviceInfo = new IoTHubDeviceInfo
{
DevAddr = devAddr,
DevEUI = twin.DeviceId,
PrimaryKey = device.Authentication.SymmetricKey.PrimaryKey
};
results.Add(iotHubDeviceInfo);
}
}
}
}
else
{
throw new Exception("Missing devEUI or devAddr");
}
return(results);
}