/// <summary>
/// Helper method that calls the API GetDevice method.
/// </summary>
private async Task <SearchDevicesResult> SearchDevicesAsync(string gatewayID = null, DevAddr?devAddr = null, DevEui?devEui = null, string appEUI = null, DevNonce?devNonce = null)
{
this.deviceLoadRequests?.Add(1);
var client = this.serviceFacadeHttpClientProvider.GetHttpClient();
var url = BuildUri("GetDevice", new Dictionary <string, string>
{
["code"] = AuthCode,
["GateWayId"] = gatewayID,
["DevAddr"] = devAddr?.ToString(),
["DevEUI"] = devEui?.ToString(),
["AppEUI"] = appEUI,
["DevNonce"] = devNonce?.ToString()
});
var response = await client.GetAsync(url);
if (!response.IsSuccessStatusCode)
{
if (response.StatusCode == System.Net.HttpStatusCode.BadRequest)
{
var badReqResult = await response.Content.ReadAsStringAsync();
if (string.Equals(badReqResult, "UsedDevNonce", StringComparison.OrdinalIgnoreCase))
{
return(new SearchDevicesResult
{
IsDevNonceAlreadyUsed = true,
});
}
if (badReqResult != null && badReqResult.StartsWith("JoinRefused", StringComparison.OrdinalIgnoreCase))
{
return(new SearchDevicesResult()
{
RefusedMessage = badReqResult
});
}
}
this.logger.LogError($"{devAddr} error calling get device function api: {response.ReasonPhrase}, status: {response.StatusCode}, check the azure function log");
// TODO: FBE check if we return null or throw exception
return(new SearchDevicesResult());
}
var result = await response.Content.ReadAsStringAsync();
var devices = (List <IoTHubDeviceInfo>)JsonConvert.DeserializeObject(result, typeof(List <IoTHubDeviceInfo>));
return(new SearchDevicesResult(devices));
}
public async Task <List <IoTHubDeviceInfo> > GetDeviceList(DevEui?devEUI, string gatewayId, DevNonce?devNonce, DevAddr?devAddr, ILogger log = null)
{
var results = new List <IoTHubDeviceInfo>();
if (devEUI is { } someDevEui)
{
var joinInfo = await TryGetJoinInfoAndValidateAsync(someDevEui, gatewayId, log);
// OTAA join
using var deviceCache = new LoRaDeviceCache(this.cacheStore, someDevEui, gatewayId);
var cacheKeyDevNonce = string.Concat(devEUI, ":", devNonce);
if (this.cacheStore.StringSet(cacheKeyDevNonce, devNonce?.ToString(), TimeSpan.FromMinutes(5), onlyIfNotExists: true))
{
var iotHubDeviceInfo = new IoTHubDeviceInfo
{
DevEUI = someDevEui,
PrimaryKey = joinInfo.PrimaryKey
};
results.Add(iotHubDeviceInfo);
if (await deviceCache.TryToLockAsync())
{
deviceCache.ClearCache(); // clear the fcnt up/down after the join
log?.LogDebug("Removed key '{key}':{gwid}", someDevEui, gatewayId);
}
else
{
log?.LogWarning("Failed to acquire lock for '{key}'", someDevEui);
}
}
else
{
log?.LogDebug("dev nonce already used. Ignore request '{key}':{gwid}", someDevEui, gatewayId);
throw new DeviceNonceUsedException();
}
}