public async Task MultipleQuestions_SomeQuestionNoAnswer_AnswerAll()
{
var resolver = new NameServer {
Catalog = dotcom, AnswerAllQuestions = true
};
var request = new Message();
request.Questions.Add(new Question {
Name = "unknown-name.com", Type = DnsType.AAAA
});
request.Questions.Add(new Question {
Name = "unknown-name.example.com", Type = DnsType.AAAA
});
request.Questions.Add(new Question {
Name = "ns.example.com", Type = DnsType.AAAA
});
request.Questions.Add(new Question {
Name = "ns.example.com", Type = DnsType.A
});
var response = await resolver.ResolveAsync(request);
Assert.IsTrue(response.IsResponse);
Assert.AreEqual(MessageStatus.NoError, response.Status);
Assert.IsTrue(response.AA);
Assert.AreEqual(2, response.Answers.Count);
Assert.AreEqual(3, response.AuthorityRecords.Count);
}
public async Task SecureQueryHasSignature()
{
// See https://tools.ietf.org/html/rfc4035#appendix-B.1
var resolver = new NameServer {
Catalog = example
};
var request = new Message().UseDnsSecurity();
request.Questions.Add(new Question {
Name = "x.w.example", Type = DnsType.MX
});
var response = await resolver.ResolveAsync(request);
Assert.IsTrue(response.IsResponse);
Assert.AreEqual(MessageStatus.NoError, response.Status);
Assert.IsTrue(response.AA);
Assert.IsTrue(response.DO);
Assert.AreEqual(2, response.Answers.Count);
Assert.AreEqual(1, response.Answers.OfType <MXRecord>().Count());
Assert.AreEqual(1, response.Answers.OfType <RRSIGRecord>().Count());
Assert.AreEqual(3, response.AuthorityRecords.Count);
Assert.AreEqual(2, response.AuthorityRecords.OfType <NSRecord>().Count());
Assert.AreEqual(1, response.AuthorityRecords.OfType <RRSIGRecord>().Count());
}
public async Task AdditionalRecords_NoDuplicates()
{
var resolver = new NameServer {
Catalog = dotorg, AnswerAllQuestions = true
};
var request = new Message();
request.Questions.Add(new Question {
Name = "example.org", Type = DnsType.NS
});
request.Questions.Add(new Question {
Name = "ns1.example.org", Type = DnsType.A
});
request.Questions.Add(new Question {
Name = "ns2.example.org", Type = DnsType.A
});
var response = await resolver.ResolveAsync(request);
Assert.IsTrue(response.IsResponse);
Assert.AreEqual(MessageStatus.NoError, response.Status);
Assert.IsTrue(response.AA);
Assert.AreEqual(4, response.Answers.Count);
Assert.AreEqual(0, response.AdditionalRecords.Count);
}
public async Task Alias_BadInterZoneTarget()
{
var resolver = new NameServer {
Catalog = dotcom
};
var bad = new Node {
Name = "bad.example.com", Authoritative = true
};
bad.Resources.Add(new CNAMERecord {
Name = bad.Name, Target = "somewhere-else.org"
});
resolver.Catalog.TryAdd(bad.Name, bad);
var question = new Question {
Name = "bad.example.com", Type = DnsType.A
};
var response = await resolver.ResolveAsync(question);
Assert.IsTrue(response.IsResponse);
Assert.IsTrue(response.AA);
Assert.AreEqual(MessageStatus.NameError, response.Status);
Assert.AreEqual(1, response.Answers.Count);
Assert.AreEqual(DnsType.CNAME, response.Answers[0].Type);
Assert.AreEqual(0, response.AuthorityRecords.Count);
}
public async Task Alias_BadZoneTarget()
{
var resolver = new NameServer {
Catalog = dotcom
};
var ftp = new Node {
Name = "ftp.example.com", Authoritative = true
};
ftp.Resources.Add(new CNAMERecord {
Name = ftp.Name, Target = "ftp-server.example.com"
});
resolver.Catalog.TryAdd(ftp.Name, ftp);
var question = new Question {
Name = "ftp.example.com", Type = DnsType.A
};
var response = await resolver.ResolveAsync(question);
Assert.IsTrue(response.IsResponse);
Assert.IsTrue(response.AA);
Assert.AreEqual(MessageStatus.NameError, response.Status);
Assert.AreEqual(1, response.Answers.Count);
Assert.AreEqual(DnsType.CNAME, response.Answers[0].Type);
Assert.AreEqual(1, response.AuthorityRecords.Count);
var authority = response.AuthorityRecords.OfType <SOARecord>().First();
Assert.AreEqual("example.com", authority.Name);
}
public async Task Missing_Class()
{
var resolver = new NameServer {
Catalog = dotcom
};
var question = new Question {
Name = "ns.example.com", Class = DnsClass.CH
};
var response = await resolver.ResolveAsync(question);
Assert.IsTrue(response.IsResponse);
Assert.AreEqual(MessageStatus.NameError, response.Status);
}
public async Task AnyType()
{
var resolver = new NameServer {
Catalog = dotcom
};
var question = new Question {
Name = "ns.example.com", Type = DnsType.ANY
};
var response = await resolver.ResolveAsync(question);
Assert.IsTrue(response.IsResponse);
Assert.AreEqual(MessageStatus.NoError, response.Status);
Assert.IsTrue(response.AA);
Assert.AreEqual(2, response.Answers.Count);
}
public async Task QueryWithDo()
{
var resolver = new NameServer {
Catalog = example
};
var request = new Message().UseDnsSecurity();
request.Questions.Add(new Question {
Name = "x.w.example", Type = DnsType.MX
});
var response = await resolver.ResolveAsync(request);
Assert.IsTrue(response.IsResponse);
Assert.AreEqual(MessageStatus.NoError, response.Status);
Assert.IsTrue(response.AA);
Assert.IsTrue(response.DO);
}
public async Task Missing_Name()
{
var resolver = new NameServer {
Catalog = dotcom
};
var question = new Question {
Name = "foo.bar.example.com", Type = DnsType.A
};
var response = await resolver.ResolveAsync(question);
Assert.IsTrue(response.IsResponse);
Assert.AreEqual(MessageStatus.NameError, response.Status);
Assert.IsTrue(response.AuthorityRecords.Count > 0);
var authority = response.AuthorityRecords.OfType <SOARecord>().First();
Assert.AreEqual("example.com", authority.Name);
}
public async Task SupportDnssec()
{
var resolver = new NameServer {
Catalog = example
};
var request = new Message();
request.Questions.Add(new Question {
Name = "x.w.example", Type = DnsType.MX
});
var response = await resolver.ResolveAsync(request);
Assert.IsFalse(response.DO);
request.UseDnsSecurity();
response = await resolver.ResolveAsync(request);
Assert.IsTrue(response.DO);
}
public async Task AdditionalRecords_SRV()
{
var resolver = new NameServer {
Catalog = dotorg
};
var request = new Message();
request.Questions.Add(new Question {
Name = "a._http._tcp.example.org", Type = DnsType.SRV
});
var response = await resolver.ResolveAsync(request);
Assert.IsTrue(response.IsResponse);
Assert.AreEqual(MessageStatus.NoError, response.Status);
Assert.IsTrue(response.AA);
Assert.AreEqual(1, response.Answers.Count);
Assert.IsTrue(response.AdditionalRecords.OfType <TXTRecord>().Any());
Assert.IsTrue(response.AdditionalRecords.OfType <ARecord>().Any());
}
public async Task AdditionalRecords_NS()
{
var resolver = new NameServer {
Catalog = dotorg
};
var request = new Message();
request.Questions.Add(new Question {
Name = "example.org", Type = DnsType.NS
});
var response = await resolver.ResolveAsync(request);
Assert.IsTrue(response.IsResponse);
Assert.AreEqual(MessageStatus.NoError, response.Status);
Assert.IsTrue(response.AA);
Assert.AreEqual(2, response.Answers.Count);
Assert.AreEqual(2, response.AdditionalRecords.Count);
Assert.IsTrue(response.AdditionalRecords.All(r => r.Type == DnsType.A));
}
public async Task MultipleQuestions_AnswerAny()
{
var resolver = new NameServer {
Catalog = dotcom
};
var request = new Message();
request.Questions.Add(new Question {
Name = "ns.example.com", Type = DnsType.A
});
request.Questions.Add(new Question {
Name = "ns.example.com", Type = DnsType.AAAA
});
var response = await resolver.ResolveAsync(request);
Assert.IsTrue(response.IsResponse);
Assert.AreEqual(MessageStatus.NoError, response.Status);
Assert.IsTrue(response.AA);
Assert.AreEqual(1, response.Answers.Count);
}
public async Task EscapedDotDomainName()
{
var catalog = new Catalog
{
new ARecord
{
Name = "a.b",
Address = IPAddress.Parse("127.0.0.2")
},
new ARecord
{
Name = @"a\.b",
Address = IPAddress.Parse("127.0.0.3")
}
};
var resolver = new NameServer {
Catalog = catalog
};
var request = new Message();
request.Questions.Add(new Question {
Name = "a.b", Type = DnsType.A
});
var response = await resolver.ResolveAsync(request);
Assert.AreEqual(MessageStatus.NoError, response.Status);
var answer = response.Answers.OfType <ARecord>().First();
Assert.AreEqual("127.0.0.2", answer.Address.ToString());
request = new Message();
request.Questions.Add(new Question {
Name = @"a\.b", Type = DnsType.A
});
response = await resolver.ResolveAsync(request);
Assert.AreEqual(MessageStatus.NoError, response.Status);
answer = response.Answers.OfType <ARecord>().First();
Assert.AreEqual("127.0.0.3", answer.Address.ToString());
}
public async Task AdditionalRecords_PTR_WithAddresses()
{
var resolver = new NameServer {
Catalog = dotorg
};
var request = new Message();
request.Questions.Add(new Question {
Name = "x.example.org", Type = DnsType.PTR
});
var response = await resolver.ResolveAsync(request);
Assert.IsTrue(response.IsResponse);
Assert.AreEqual(MessageStatus.NoError, response.Status);
Assert.IsTrue(response.AA);
Assert.AreEqual(1, response.Answers.Count);
Assert.AreEqual(2, response.AdditionalRecords.Count);
Assert.AreEqual(DnsType.A, response.AdditionalRecords[0].Type);
Assert.AreEqual("ns1.example.org", response.AdditionalRecords[0].Name);
}