/// <summary>
/// Try connecting to <paramref name="ep"/> and invokes <code>OnResult</code> event if success.
/// </summary>
protected async void Scan(IPEndPoint ep)
{
try
{
using (Socket client = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp))
{
client.BeginConnect(ep, null, null);
await Task.Delay(Timeout, TokenSource.Token).ConfigureAwait(false);
if (client.Connected)
{
OnResult?.BeginInvoke(this, ep, null, null);
}
}
}
catch
{
}
finally
{
SemaphoreParallelism.Release();
}
}
/// <summary>
/// Scanning loop.
/// </summary>
protected async void Loop()
{
while (!IsStopped)
{
try
{
await SemaphoreScanList.WaitAsync(TokenSource.Token).ConfigureAwait(false);
IPEndPoint ep;
lock (ScanList)
{
ep = ScanList.First.Value;
ScanList.RemoveFirst();
}
await SemaphoreParallelism.WaitAsync(TokenSource.Token).ConfigureAwait(false);
Scan(ep);
}
catch
{
}
}
}
