public void Discover_AllServices()
{
var service = new ServiceProfile("x", "_sdtest-2._udp", 1024);
var done = new ManualResetEvent(false);
var mdns = new MulticastService();
var sd = new ServiceDiscovery(mdns);
mdns.NetworkInterfaceDiscovered += (s, e) => sd.QueryAllServices();
sd.ServiceDiscovered += (s, serviceName) =>
{
if (serviceName == service.QualifiedServiceName)
{
done.Set();
}
};
try
{
sd.Advertise(service);
mdns.Start();
Assert.IsTrue(done.WaitOne(TimeSpan.FromSeconds(1)), "DNS-SD query timeout");
}
finally
{
sd.Dispose();
mdns.Stop();
}
}
public void TTLs()
{
var service = new ServiceProfile("x", "_sdtest._udp", 1024);
Assert.AreEqual(TimeSpan.FromMinutes(75), service.Resources.OfType <TXTRecord>().First().TTL);
Assert.AreEqual(TimeSpan.FromSeconds(120), service.Resources.OfType <AddressRecord>().First().TTL);
}
public void Discover_ServiceInstance()
{
var service = new ServiceProfile("y", "_sdtest-2._udp", 1024);
var done = new ManualResetEvent(false);
var mdns = new MulticastService();
var sd = new ServiceDiscovery(mdns);
mdns.NetworkInterfaceDiscovered += (s, e) =>
{
sd.QueryServiceInstances(service.ServiceName);
};
sd.ServiceInstanceDiscovered += (s, e) =>
{
if (e.ServiceInstanceName == service.FullyQualifiedName)
{
Assert.IsNotNull(e.Message);
done.Set();
}
};
try
{
sd.Advertise(service);
mdns.Start();
Assert.IsTrue(done.WaitOne(TimeSpan.FromSeconds(1)), "instance not found");
}
finally
{
sd.Dispose();
mdns.Stop();
}
}
public void Announce_SentTwice()
{
var service = new ServiceProfile("z", "_sdtest-4._udp", 1024, new[] { IPAddress.Loopback });
var done = new ManualResetEvent(false);
var nanswers = 0;
var mdns = new MulticastService
{
IgnoreDuplicateMessages = false
};
mdns.AnswerReceived += (s, e) =>
{
var msg = e.Message;
if (msg.Answers.OfType <PTRRecord>().Any(p => p.DomainName == service.FullyQualifiedName))
{
if (++nanswers == 2)
{
done.Set();
}
}
};
try
{
using (var sd = new ServiceDiscovery(mdns))
{
mdns.NetworkInterfaceDiscovered += (s, e) => sd.Announce(service);
mdns.Start();
Assert.IsTrue(done.WaitOne(TimeSpan.FromSeconds(4)), "announce timeout");
}
}
finally
{
mdns.Stop();
}
}
public void Advertises_ServiceInstance_Address()
{
var service = new ServiceProfile("x2", "_sdtest-1._udp", 1024, new[] { IPAddress.Loopback });
var done = new ManualResetEvent(false);
var mdns = new MulticastService();
mdns.NetworkInterfaceDiscovered += (s, e) =>
mdns.SendQuery(service.HostName, DnsClass.IN, DnsType.A);
mdns.AnswerReceived += (s, e) =>
{
var msg = e.Message;
if (msg.Answers.OfType <ARecord>().Any(p => p.Name == service.HostName))
{
done.Set();
}
};
try
{
using (var sd = new ServiceDiscovery(mdns))
{
sd.Advertise(service);
mdns.Start();
Assert.IsTrue(done.WaitOne(TimeSpan.FromSeconds(1)), "query timeout");
}
}
finally
{
mdns.Stop();
}
}
public void Unadvertise()
{
var service = new ServiceProfile("z", "_sdtest-7._udp", 1024);
var done = new ManualResetEvent(false);
var mdns = new MulticastService();
var sd = new ServiceDiscovery(mdns);
mdns.NetworkInterfaceDiscovered += (s, e) => sd.QueryAllServices();
sd.ServiceInstanceShutdown += (s, e) =>
{
if (e.ServiceInstanceName == service.FullyQualifiedName)
{
done.Set();
}
};
try
{
sd.Advertise(service);
mdns.Start();
sd.Unadvertise(service);
Assert.IsTrue(done.WaitOne(TimeSpan.FromSeconds(1)), "goodbye timeout");
}
finally
{
sd.Dispose();
mdns.Stop();
}
}
public void Announce_ContainsResourceRecords()
{
var service = new ServiceProfile("z", "_sdtest-4._udp", 1024, new[] { IPAddress.Loopback });
var done = new ManualResetEvent(false);
var mdns = new MulticastService();
mdns.AnswerReceived += (s, e) =>
{
var msg = e.Message;
foreach (var r in service.Resources)
{
if (!msg.Answers.Contains(r))
{
return;
}
}
done.Set();
};
try
{
using (var sd = new ServiceDiscovery(mdns))
{
mdns.NetworkInterfaceDiscovered += (s, e) => sd.Announce(service);
mdns.Start();
Assert.IsTrue(done.WaitOne(TimeSpan.FromSeconds(3)), "announce timeout");
}
}
finally
{
mdns.Stop();
}
}
public void QualifiedNames()
{
var service = new ServiceProfile("x", "_sdtest._udp", 1024, new [] { IPAddress.Loopback });
Assert.AreEqual("_sdtest._udp.local", service.QualifiedServiceName);
Assert.AreEqual("x._sdtest._udp.local", service.FullyQualifiedName);
}
public void ResourceRecords()
{
var service = new ServiceProfile("x", "_sdtest._udp", 1024, new[] { IPAddress.Loopback });
Assert.IsTrue(service.Resources.OfType <SRVRecord>().Any());
Assert.IsTrue(service.Resources.OfType <TXTRecord>().Any());
Assert.IsTrue(service.Resources.OfType <ARecord>().Any());
}
public void HostName()
{
var service = new ServiceProfile("fred", "_foo._tcp", 1024);
Assert.AreEqual("fred.foo.local", service.HostName);
service = new ServiceProfile("fred", "_foo_bar._tcp", 1024);
Assert.AreEqual("fred.foo-bar.local", service.HostName);
}
public void TXTRecords()
{
var service = new ServiceProfile("x", "_sdtest._udp", 1024);
var txt = service.Resources.OfType <TXTRecord>().First();
txt.Strings.AddRange(new [] { "a=1", "b=2" });
CollectionAssert.Contains(txt.Strings, "txtvers=1");
CollectionAssert.Contains(txt.Strings, "a=1");
CollectionAssert.Contains(txt.Strings, "b=2");
}
/// <summary>
/// Advertise a service profile.
/// </summary>
/// <param name="service">
/// The service profile.
/// </param>
/// <remarks>
/// Any queries for the service or service instance will be answered with
/// information from the profile.
/// </remarks>
public void Advertise(ServiceProfile service)
{
profiles.Add(service);
var catalog = NameServer.Catalog;
catalog.Add(service.instancePtrRecord, authoritative: true);
catalog.Add(service.servicePtrRecord, authoritative: true);
foreach (var r in service.Resources)
{
catalog.Add(r, authoritative: true);
}
}
public void AddProperty()
{
var service = new ServiceProfile
{
InstanceName = "x",
ServiceName = "_sdtest._udp"
};
service.AddProperty("a", "1");
var txt = service.Resources.OfType <TXTRecord>().First();
Assert.AreEqual(service.FullyQualifiedName, txt.Name);
CollectionAssert.Contains(txt.Strings, "a=1");
}
public void Discover_ServiceInstance_WithAnswersContainingAdditionRecords()
{
var service = new ServiceProfile("y", "_sdtest-2._udp", 1024, new[] { IPAddress.Parse("127.1.1.1") });
var done = new ManualResetEvent(false);
using (var mdns = new MulticastService())
using (var sd = new ServiceDiscovery(mdns)
{
AnswersContainsAdditionalRecords = true
})
{
Message discovered = null;
mdns.NetworkInterfaceDiscovered += (s, e) =>
{
sd.QueryServiceInstances(service.ServiceName);
};
sd.ServiceInstanceDiscovered += (s, e) =>
{
if (e.ServiceInstanceName == service.FullyQualifiedName)
{
Assert.IsNotNull(e.Message);
discovered = e.Message;
done.Set();
}
};
sd.Advertise(service);
mdns.Start();
Assert.IsTrue(done.WaitOne(TimeSpan.FromSeconds(3)), "instance not found");
var additionalRecordsCount =
1 + // SRVRecord
1 + // TXTRecord
1; // AddressRecord
var answersCount = additionalRecordsCount +
1; // PTRRecord
Assert.AreEqual(0, discovered.AdditionalRecords.Count);
Assert.AreEqual(answersCount, discovered.Answers.Count);
}
}
public void ResourceRecords()
{
var profile = new ServiceProfile("me", "_myservice._udp", 1234, new IPAddress[] { IPAddress.Loopback });
profile.Subtypes.Add("apiv2");
profile.AddProperty("someprop", "somevalue");
using (var sd = new ServiceDiscovery())
{
sd.Advertise(profile);
var resourceRecords = sd.NameServer.Catalog.Values.SelectMany(node => node.Resources);
foreach (var r in resourceRecords)
{
Console.WriteLine(r.ToString());
}
}
}
public void ReverseAddressMapping()
{
var service = new ServiceProfile("x9", "_sdtest-1._udp", 1024, new[] { IPAddress.Loopback, IPAddress.IPv6Loopback });
var arpaAddress = IPAddress.Loopback.GetArpaName();
var done = new ManualResetEvent(false);
var mdns = new MulticastService();
Message response = null;
mdns.NetworkInterfaceDiscovered += (s, e) =>
mdns.SendQuery(arpaAddress, DnsClass.IN, DnsType.PTR);
mdns.AnswerReceived += (s, e) =>
{
var msg = e.Message;
if (msg.Answers.OfType <PTRRecord>().Any(p => p.Name == arpaAddress))
{
response = msg;
done.Set();
}
};
try
{
using (var sd = new ServiceDiscovery(mdns))
{
sd.Advertise(service);
mdns.Start();
Assert.IsTrue(done.WaitOne(TimeSpan.FromSeconds(1)), "query timeout");
var answers = response.Answers
.OfType <PTRRecord>()
.Where(ptr => service.HostName == ptr.DomainName);
foreach (var answer in answers)
{
Assert.AreEqual(arpaAddress, answer.Name);
Assert.IsTrue(answer.TTL > TimeSpan.Zero);
Assert.AreEqual(DnsClass.IN, answer.Class);
}
}
}
finally
{
mdns.Stop();
}
}
/// <summary>
/// Sends a goodbye message for the provided
/// profile and removes its pointer from the name sever.
/// </summary>
/// <param name="profile">The profile to send a goodbye message for.</param>
public void Unadvertise(ServiceProfile profile)
{
var message = new Message {
QR = true
};
var ptrRecord = new PTRRecord {
Name = profile.QualifiedServiceName, DomainName = profile.FullyQualifiedName
};
ptrRecord.TTL = TimeSpan.Zero;
message.Answers.Add(ptrRecord);
profile.Resources.ForEach((resource) =>
{
resource.TTL = TimeSpan.Zero;
message.AdditionalRecords.Add(resource);
});
Mdns.SendAnswer(message);
NameServer.Catalog.TryRemove(profile.QualifiedServiceName, out Node _);
}
public void Discover_ServiceInstance_WithAnswersContainingAdditionRecords()
{
var service = new ServiceProfile("y", "_sdtest-2._udp", 1024);
var done = new ManualResetEvent(false);
var mdns = new MulticastService();
var sd = new ServiceDiscovery(mdns)
{
AnswersContainsAdditionalRecords = true
};
Message discovered = null;
mdns.NetworkInterfaceDiscovered += (s, e) =>
{
sd.QueryServiceInstances(service.ServiceName);
};
sd.ServiceInstanceDiscovered += (s, e) =>
{
if (e.ServiceInstanceName == service.FullyQualifiedName)
{
Assert.IsNotNull(e.Message);
discovered = e.Message;
done.Set();
}
};
try
{
sd.Advertise(service);
mdns.Start();
Assert.IsTrue(done.WaitOne(TimeSpan.FromSeconds(1)), "instance not found");
Assert.AreEqual(0, discovered.AdditionalRecords.Count);
Assert.IsTrue(discovered.Answers.Count > 1);
}
finally
{
sd.Dispose();
mdns.Stop();
}
}
/// <summary>
/// Advertise a service profile.
/// </summary>
/// <param name="service">
/// The service profile.
/// </param>
/// <remarks>
/// Any queries for the service or service instance will be answered with
/// information from the profile.
/// </remarks>
public void Advertise(ServiceProfile service)
{
profiles.Add(service);
var catalog = NameServer.Catalog;
catalog.Add(
new PTRRecord {
Name = ServiceName, DomainName = service.QualifiedServiceName
},
authoritative: true);
catalog.Add(
new PTRRecord {
Name = service.QualifiedServiceName, DomainName = service.FullyQualifiedName
},
authoritative: true);
foreach (var r in service.Resources)
{
catalog.Add(r, authoritative: true);
}
}
/// <summary>
/// Sends an unsolicited MDNS response describing the
/// service profile.
/// </summary>
/// <param name="profile">
/// The profile to describe.
/// </param>
/// <remarks>
/// Sends a MDNS response <see cref="Message"/> containing the pointer
/// and resource records of the <paramref name="profile"/>.
/// <para>
/// To provide increased robustness against packet loss,
/// two unsolicited responses are sent one second apart.
/// </para>
/// </remarks>
public void Announce(ServiceProfile profile)
{
var message = new Message {
QR = true
};
// Add the shared records.
var ptrRecord = new PTRRecord {
Name = profile.QualifiedServiceName, DomainName = profile.FullyQualifiedName
};
message.Answers.Add(ptrRecord);
// Add the resource records.
profile.Resources.ForEach((resource) =>
{
message.Answers.Add(resource);
});
Mdns.SendAnswer(message, checkDuplicate: false);
Task.Delay(1000).Wait();
Mdns.SendAnswer(message, checkDuplicate: false);
}
/// <summary>
/// Advertise a service profile.
/// </summary>
/// <param name="service">
/// The service profile.
/// </param>
/// <remarks>
/// Any queries for the service or service instance will be answered with
/// information from the profile.
/// <para>
/// Besides adding the profile's resource records to the <see cref="Catalog"/> PTR records are
/// created to support DNS-SD and reverse address mapping (DNS address lookup).
/// </para>
/// </remarks>
public void Advertise(ServiceProfile service)
{
profiles.Add(service);
var catalog = NameServer.Catalog;
catalog.Add(
new PTRRecord {
Name = ServiceName, DomainName = service.QualifiedServiceName
},
authoritative: true);
catalog.Add(
new PTRRecord {
Name = service.QualifiedServiceName, DomainName = service.FullyQualifiedName
},
authoritative: true);
foreach (var subtype in service.Subtypes)
{
var ptr = new PTRRecord
{
Name = DomainName.Join(
new DomainName(subtype),
SubName,
service.QualifiedServiceName),
DomainName = service.FullyQualifiedName
};
catalog.Add(ptr, authoritative: true);
}
foreach (var r in service.Resources)
{
catalog.Add(r, authoritative: true);
}
catalog.IncludeReverseLookupRecords();
}
public void Subtypes()
{
var service = new ServiceProfile("x", "_sdtest._udp", 1024);
Assert.AreEqual(0, service.Subtypes.Count);
}
public void Defaults()
{
var service = new ServiceProfile();
Assert.IsNotNull(service.Resources);
}
public void Addresses_Default()
{
var service = new ServiceProfile("x", "_sdtest._udp", 1024);
Assert.IsTrue(service.Resources.Any(r => r.Type == DnsType.A || r.Type == DnsType.AAAA));
}
public void Addresses_IPv6()
{
var service = new ServiceProfile("x", "_sdtest._udp", 1024, new[] { IPAddress.IPv6Loopback });
Assert.IsTrue(service.Resources.Any(r => r.Type == DnsType.AAAA));
}
