/// <summary>
/// Get available Webservices
/// </summary>
///
internal async Task <int> GetAvailableWSEndpointsInternal()
{
int ret = 0;
try
{
this.Status = -2;
m_endPoints.Clear();
IsNotWorking = false;
using (var socket = new Windows.Networking.Sockets.DatagramSocket())
{
// Set the callback for servers' responses
// await m_MessageReceive.WaitAsync();
socket.MessageReceived += SocketOnMessageReceived;
// Start listening for servers' responses
await socket.BindServiceNameAsync(m_ListenPort.ToString());
// Send a search message
await SendMessage(socket);
bool bTimeOut = false;
ThreadPoolTimer timer = ThreadPoolTimer.CreateTimer((t) =>
{
bTimeOut = true;
m_signal.Release();
}, TimeSpan.FromSeconds(m_timeOut + 2)); // Timeout +2
await m_signal.WaitAsync();
timer.Cancel();
timer = null;
if (bTimeOut)
{
ret = -1;
await socket.CancelIOAsync();
}
else
{
ret = 1;
}
}
}
catch (Exception)
{
m_signal.Release();
ret = -1;
}
IsNotWorking = true;
this.Status = ret;
return(ret);
}
private async void Search(string st, TimeSpan? timeout = null)
{
Log("Search - " + st);
var ssdp_data = new StringBuilder()
.Append("M-SEARCH * HTTP/1.1").Append("\r\n")
.Append("HOST: ").Append(MULTICAST_ADDRESS).Append(":").Append(SSDP_PORT.ToString()).Append("\r\n")
.Append("MAN: ").Append("\"ssdp:discover\"").Append("\r\n")
.Append("MX: ").Append(MX.ToString()).Append("\r\n")
.Append("ST: ").Append(st).Append("\r\n")
.Append("\r\n")
.ToString();
var adapters = TargetNetworkAdapters ?? await GetActiveAdaptersAsync().ConfigureAwait(false);
await Task.WhenAll(adapters.Select(async adapter =>
{
using (var socket = new DatagramSocket())
{
socket.Control.DontFragment = true;
socket.MessageReceived += OnDatagramSocketMessageReceived;
try
{
await socket.BindServiceNameAsync("", adapter);
using (var output = await socket.GetOutputStreamAsync(MULTICAST_HOST, SSDP_PORT.ToString()))
{
using (var writer = new DataWriter(output))
{
writer.WriteString(ssdp_data);
await writer.StoreAsync();
}
}
await Task.Delay(timeout ?? DEFAULT_TIMEOUT).ConfigureAwait(false);
Log("Search Timeout");
await socket.CancelIOAsync();
}
catch (Exception e)
{
Log("Failed to send multicast: " + e.StackTrace);
}
socket.MessageReceived -= OnDatagramSocketMessageReceived;
}
})).ConfigureAwait(false);
Finished?.Invoke(this, new EventArgs());
}
