// Scan a range of ports asynchronously
public async void ExecuteRangeAsync(string hostname, int portMin, int portMax, int timeout, ScanMode scanMode, MainWindow.ExecuteOnceAsyncCallback callback, CancellationToken ct)
{
// Instantiate a PortScanner
InstantiatePortScanner(scanMode);
// Assign first values
portScanner.Hostname = hostname;
portScanner.Timeout = timeout;
bool isLast = false;
bool cancelled = false;
for (int i = portMin; i <= portMax && !cancelled; i++)
{
if (i == portMax)
{
isLast = true;
}
portScanner.Port = i;
var task = portScanner.CheckOpenAsync(ct);
await task;
cancelled = ct.IsCancellationRequested;
callback(i, task.Result, cancelled, isLast);
}
}
// Scan one port asynchronously
public async void ExecuteOnceAsync(string hostname, int port, int timeout, ScanMode scanMode, MainWindow.ExecuteOnceAsyncCallback callback, CancellationToken ct)
{
// Instantiate a PortScanner
InstantiatePortScanner(scanMode);
// Assign values
portScanner.Hostname = hostname;
portScanner.Port = port;
portScanner.Timeout = timeout;
// Await for the result of this operation
var task = portScanner.CheckOpenAsync(ct);
await task;
// If a cancellation request has been triggered through CancellationToken ct, we must advise the callback function
bool cancelled = ct.IsCancellationRequested;
// Callback with the result and the port
callback(port, task.Result, cancelled, true);
}
