/// <summary>
/// Method to receive async
/// </summary>
/// <param name="client">the udp client</param>
/// <returns>the result task</returns>
private async Task ReceiveAsync(UdpClient client, Action <FritzDevice> deviceCallback)
{
IPEndPoint endpoint = new IPEndPoint(IPAddress.Any, 1900);
// delay for 20 seconds
Task waitTask = Task.Delay(TimeSpan.FromSeconds(10));
var getDeviceInfoTasks = new List <Task <Tr64Description> >();
Dictionary <IPAddress, FritzDevice> discovered = new Dictionary <IPAddress, FritzDevice>();
var tr64DataReader = new Tr64DataReader();
while (!waitTask.IsCompleted)
{
var receiveTask = SafeReceiveAsync(client);
// check wat for tasks
Task finishedTask = await Task.WhenAny(receiveTask, waitTask);
if (finishedTask == receiveTask)
{
UdpReceiveResult result = await receiveTask;
// if there is data in buffer read and pars it
if (result.Buffer != null && result.Buffer.Length > 0)
{
string response = Encoding.ASCII.GetString(result.Buffer, 0, result.Buffer.Length);
// create device by endpoint data
FritzDevice device = FritzDevice.ParseResponse(result.RemoteEndPoint.Address, response);
if (!discovered.ContainsKey(result.RemoteEndPoint.Address))
{
if (device != null && device.Location != null && device.Location.Scheme != "unknown")
{
// fetch the device info
deviceCallback?.Invoke(device);
getDeviceInfoTasks.Add(tr64DataReader.ReadDeviceInfoAsync(device));
discovered.Add(result.RemoteEndPoint.Address, device);
}
}
}
}
}
if (getDeviceInfoTasks.Count > 0)
{
foreach (var task in getDeviceInfoTasks)
{
try
{
var description = await task;
description.Device.ParseTR64Desc(description.Data);
} catch (FritzDeviceException e)
{
Console.WriteLine(e.Message);
}
}
}
}
/// <summary>
/// Creates a single <see cref="FritzDevice"/>.
/// </summary>
/// <param name="address">The address the device can be found under.</param>
/// <returns>The ready-to-use device.</returns>
/// <exception cref="FritzDeviceException">Thrown if a device can not be created or if the data is incomplete.</exception>
public async Task <FritzDevice> CreateDeviceAsync(IPAddress address)
{
var locationBuilder = new UriBuilder("http", address.ToString(), _dataQueryPort);
var device = new FritzDevice(address, locationBuilder.Uri);
var tr64Reader = new Tr64DataReader();
var tr64Data = await tr64Reader.ReadDeviceInfoAsync(device);
device.ParseTR64Desc(tr64Data.Data);
return(device);
}
