/// <summary>Itearte all ports asynchronously.</summary>
/// <returns>Result of iteration checking.</returns>
private async Task <Port[]> IteratePortsAsync()
{
List <Port> result = new List <Port>();
await Task.Run(() =>
{
lock (_lockObject)
{
// Use all processors
Parallel.ForEach(Ports, _parallelOptions, port =>
{
try
{
_checker = new PortChecker();
_checker.InstallHost(Host);
if (!_aborted)
{
port.ChangeState(_checker.CheckPort(port));
}
result.Add(port);
_scannedPortsCount++;
OnOnePortWasScanned?.Invoke(PortsCount, _scannedPortsCount);
}
catch (ArgumentNullException) // If host not initializes in checker.
{
result = new List <Port>();
return;
}
});
}
});
return(result.ToArray());
}
/// <summary>Scan range of ports.</summary>
/// <param name="from">First port.</param>
/// <param name="to">Last port.</param>
/// <returns>Array with scan results</returns>
/// <exception cref="RangeOfPortsException">Throws when from and to parameters not looks like a range.</exception>
private async Task <Port[]> ScanRange(Port from, Port to)
{
if (from.Value >= to.Value && from.Protocol == to.Protocol)
{
throw new RangeOfPortsException("Ports array are not correct.");
}
List <Port> result = new List <Port>();
ProtocolType protocol = from.Protocol;
await Task.Run(() =>
{
lock (_lockObject)
{
Parallel.For(from.Value, to.Value + 1, _parallelOptions, currentPort =>
{
_checker = new PortChecker();
_checker.InstallHost(Host);
Port portToScan = new Port((ushort)currentPort, protocol);
if (!_aborted)
{
portToScan.ChangeState(_checker.CheckPort(portToScan));
}
result.Add(portToScan);
currentPort++;
_scannedPortsCount++;
OnOnePortWasScanned?.Invoke(PortsCount, _scannedPortsCount);
});
}
});
return(result.ToArray());
}