public async Task <List <IoTHubDeviceInfo> > GetDeviceList(string devEUI, string gatewayId, string devNonce, string devAddr, ILogger log = null)
{
var results = new List <IoTHubDeviceInfo>();
if (devEUI != null)
{
var joinInfo = await this.TryGetJoinInfoAndValidateAsync(devEUI, gatewayId, log);
// OTAA join
using (var deviceCache = new LoRaDeviceCache(this.cacheStore, devEUI, gatewayId))
{
var cacheKeyDevNonce = string.Concat(devEUI, ":", devNonce);
var lockKeyDevNonce = string.Concat(cacheKeyDevNonce, ":joinlockdevnonce");
if (this.cacheStore.StringSet(cacheKeyDevNonce, devNonce, TimeSpan.FromMinutes(5), onlyIfNotExists: true))
{
var iotHubDeviceInfo = new IoTHubDeviceInfo
{
DevEUI = devEUI,
PrimaryKey = joinInfo.PrimaryKey
};
results.Add(iotHubDeviceInfo);
if (await deviceCache.TryToLockAsync())
{
this.cacheStore.KeyDelete(devEUI);
log?.LogDebug("Removed key '{key}':{gwid}", devEUI, gatewayId);
}
else
{
log?.LogWarning("Failed to acquire lock for '{key}'", devEUI);
}
}
else
{
log?.LogDebug("dev nonce already used. Ignore request '{key}':{gwid}", devEUI, gatewayId);
throw new DeviceNonceUsedException();
}
}
}
else if (devAddr != null)
{
// ABP or normal message
// TODO check for sql injection
devAddr = devAddr.Replace('\'', ' ');
var devAddrCache = new LoRaDevAddrCache(this.cacheStore, this.registryManager, log, gatewayId);
if (await devAddrCache.TryTakeDevAddrUpdateLock(devAddr))
{
try
{
if (devAddrCache.TryGetInfo(devAddr, out List <DevAddrCacheInfo> devAddressesInfo))
{
for (int i = 0; i < devAddressesInfo.Count; i++)
{
if (!string.IsNullOrEmpty(devAddressesInfo[i].DevEUI))
{
// device was not yet populated
if (!string.IsNullOrEmpty(devAddressesInfo[i].PrimaryKey))
{
results.Add(devAddressesInfo[i]);
}
else
{
// we need to load the primaryKey from IoTHub
// Add a lock loadPrimaryKey get lock get
devAddressesInfo[i].PrimaryKey = await this.LoadPrimaryKeyAsync(devAddressesInfo[i].DevEUI);
results.Add(devAddressesInfo[i]);
devAddrCache.StoreInfo(devAddressesInfo[i]);
}
// even if we fail to acquire the lock we wont enter in the next condition as devaddressinfo is not null
}
}
}
// if the cache results are null, we query the IoT Hub.
// if the device is not found is the cache we query, if there was something, it is probably not our device.
if (results.Count == 0 && devAddressesInfo == null)
{
if (await devAddrCache.TryTakeDevAddrUpdateLock(devAddr))
{
try
{
var query = this.registryManager.CreateQuery($"SELECT * FROM devices WHERE properties.desired.DevAddr = '{devAddr}' OR properties.reported.DevAddr ='{devAddr}'", 100);
int resultCount = 0;
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 DevAddrCacheInfo
{
DevAddr = devAddr,
DevEUI = twin.DeviceId,
PrimaryKey = device.Authentication.SymmetricKey.PrimaryKey,
GatewayId = twin.GetGatewayID(),
NwkSKey = twin.GetNwkSKey(),
LastUpdatedTwins = twin.Properties.Desired.GetLastUpdated()
};
results.Add(iotHubDeviceInfo);
devAddrCache.StoreInfo((DevAddrCacheInfo)iotHubDeviceInfo);
}
resultCount++;
}
}
// todo save when not our devaddr
if (resultCount == 0)
{
devAddrCache.StoreInfo(new DevAddrCacheInfo()
{
DevAddr = devAddr,
DevEUI = string.Empty
});
}
}
finally
{
devAddrCache.ReleaseDevAddrUpdateLock(devAddr);
}
}
}
}
finally
{
devAddrCache.ReleaseDevAddrUpdateLock(devAddr);
}
}
}
else
{
throw new Exception("Missing devEUI or devAddr");
}
return(results);
}
public SyncDevAddrCache(LoRaDevAddrCache loRaDevAddrCache, RegistryManager registryManager)
{
this.loRaDevAddrCache = loRaDevAddrCache;
this.registryManager = registryManager;
}
public async Task StartAsync(CancellationToken cancellationToken)
{
LoRaDevAddrCache loRaDevAddrCache = new LoRaDevAddrCache(this.cacheStore, this.registryManager, this.logger, null);
await Task.FromResult(0);
}