public void Resolve_NoAnswer()
{
var service = Guid.NewGuid().ToString() + ".local";
var query = new Message();
query.Questions.Add(new Question {
Name = service, Type = DnsType.ANY
});
var cancellation = new CancellationTokenSource(500);
using (var mdns = new MulticastService())
{
mdns.Start();
ExceptionAssert.Throws <TaskCanceledException>(() =>
{
var _ = mdns.ResolveAsync(query, cancellation.Token).Result;
});
}
}
public async Task Resolve()
{
var service = Guid.NewGuid().ToString() + ".local";
var query = new Message();
query.Questions.Add(new Question {
Name = service, Type = DnsType.ANY
});
var cancellation = new CancellationTokenSource(2000);
using (var mdns = new MulticastService())
{
mdns.QueryReceived += (s, e) =>
{
var msg = e.Message;
if (msg.Questions.Any(q => q.Name == service))
{
var res = msg.CreateResponse();
res.Answers.Add(new ARecord
{
Name = service,
Address = IPAddress.Parse("127.1.1.1")
});
mdns.SendAnswer(res);
}
};
mdns.Start();
var response = await mdns.ResolveAsync(query, cancellation.Token);
Assert.IsNotNull(response, "no response");
Assert.IsTrue(response.IsResponse);
Assert.AreEqual(MessageStatus.NoError, response.Status);
Assert.IsTrue(response.AA);
var a = (ARecord)response.Answers[0];
Assert.AreEqual(IPAddress.Parse("127.1.1.1"), a.Address);
}
}