private static ScanNetworkResult ScanEndpoint(CancellationToken userToken, DnsResolverBase resolver, Protocol protocol, IPEndpoint endpoint)
{
var status = Ping.PerformPing(endpoint, protocol);
var hostName = status ? GetHostName(resolver, endpoint) : null;
var result = new ScanNetworkResult(protocol, endpoint, hostName, status);
return result;
}
private static string GetHostName(DnsResolverBase resolver, IPEndpoint endpoint)
{
if (resolver == null)
{
return null;
}
var result = resolver.GetHostName(endpoint.Address);
#if SCREENSHOT
if (result != null)
{
result = result.Replace("example.com", "my-domain-name");
}
#endif
return result;
}
public static void ScanNetwork(CancellationToken userToken, DnsResolverBase resolver, IPAddressRange addresses, INetworkServiceCore[] networkServices, IProgress<ScanNetworkBatch> progress)
{
if (resolver == null)
{
throw new ArgumentNullException("resolver");
}
if (addresses == null)
{
throw new ArgumentNullException("addresses");
}
if (networkServices == null)
{
throw new ArgumentNullException("networkServices");
}
if (progress == null)
{
throw new ArgumentNullException("progress");
}
var nestedTasks = new List<Task>();
var chunkSize = GetChunkSize(addresses);
foreach (var addressChunk in addresses.Chunk(chunkSize))
{
userToken.ThrowIfCancellationRequested();
var nestedTask = Task.Factory.StartNew(() =>
{
foreach (var address in addressChunk)
{
var results = new List<ScanNetworkResult>();
foreach (var networkService in networkServices)
{
userToken.ThrowIfCancellationRequested();
var endpoint = new IPEndpoint(address, networkService.Port);
var result = ScanEndpoint(userToken, resolver, networkService.Protocol, endpoint);
results.Add(result);
}
progress.Report(new ScanNetworkBatch(results.ToArray()));
}
});
nestedTasks.Add(nestedTask);
}
Task.WaitAll(nestedTasks.ToArray(), userToken);
}
