/// <summary>
/// Browse domains
/// </summary>
static async Task <List <string> > BrowseDomainsAsync(int period)
{
Console.WriteLine($"Browsing for domains for {period} ms...");
var cts = new CancellationTokenSource(period);
var domains = new List <string>();
try {
using (var browser = await Dns.BrowseAsync(cts.Token)) {
cts.Token.ThrowIfCancellationRequested();
while (await browser.MoveNextAsync(cts.Token))
{
cts.Token.ThrowIfCancellationRequested();
Console.WriteLine($"{DateTime.Now}: Domain {browser.Current.Domain} on {browser.Current.Interface} " +
(browser.Current.Removed ? "removed" : "found"));
if (browser.Current.Removed)
{
domains.Remove(browser.Current.Domain);
}
else
{
domains.Add(browser.Current.Domain);
}
}
}
}
catch (OperationCanceledException) { }
return(domains);
}
/// <summary>
/// Browse service names or types
/// </summary>
static async Task <IEnumerable <DnsServiceEntry> > ResolveServiceAsync(DnsServiceRecord record,
int period, bool fromCache)
{
Console.WriteLine($"Resolving {record} for {period} ms...");
var entries = new HashSet <DnsServiceEntry>();
var cts = new CancellationTokenSource(period);
try {
using (var browser = await Dns.BrowseAsync(record, fromCache, cts.Token)) {
cts.Token.ThrowIfCancellationRequested();
while (await browser.MoveNextAsync(cts.Token))
{
cts.Token.ThrowIfCancellationRequested();
Console.WriteLine($"{DateTime.Now}: {browser.Current}");
entries.Add(browser.Current);
}
}
}
catch (OperationCanceledException) { }
return(entries);
}
/// <summary>
/// Browse service names or types
/// </summary>
static async Task <IEnumerable <DnsServiceRecord> > BrowseServicesAsync(string type, string domain,
int period, bool fromCache)
{
if (type != null)
{
Console.WriteLine($"Browsing for service names for type {type} in {domain ?? "local."} for {period} ms...");
}
else
{
Console.WriteLine($"Browsing for service types in {domain ?? "local."} for {period} ms...");
}
var records = new HashSet <DnsServiceRecord>();
var cts = new CancellationTokenSource(period);
try {
using (var browser = await Dns.BrowseAsync(type, domain, fromCache, cts.Token)) {
cts.Token.ThrowIfCancellationRequested();
while (await browser.MoveNextAsync(cts.Token))
{
cts.Token.ThrowIfCancellationRequested();
Console.WriteLine($"{DateTime.Now}: {browser.Current} " +
(browser.Current.Removed ? "removed" : "found"));
if (browser.Current.Removed)
{
records.Remove(browser.Current);
}
else
{
records.Add(browser.Current);
}
}
}
}
catch (OperationCanceledException) { }
return(records);
}
