public void Roundtrip_Master()
{
var a = new PTRRecord
{
Name = "emanon.org",
DomainName = "somewhere.else.org"
};
var b = (PTRRecord) new ResourceRecord().Read(a.ToString());
Assert.AreEqual(a.Name, b.Name);
Assert.AreEqual(a.Class, b.Class);
Assert.AreEqual(a.Type, b.Type);
Assert.AreEqual(a.TTL, b.TTL);
Assert.AreEqual(a.DomainName, b.DomainName);
}
public void Equality()
{
var a = new PTRRecord
{
Name = "emanon.org",
DomainName = "somewhere.else.org"
};
var b = new PTRRecord
{
Name = "emanon.org",
DomainName = "somewhere.org"
};
Assert.IsTrue(a.Equals(a));
Assert.IsFalse(a.Equals(b));
Assert.IsFalse(a.Equals(null));
}
/// <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 _);
}
/// <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 ServiceProfile(string instanceName, string serviceName, string domainName, ushort port, short ttl, IEnumerable <IPAddress> addresses = null)
{
InstanceName = instanceName;
ServiceName = serviceName;
Domain = domainName;
var fqn = FullyQualifiedName;
var simpleServiceName = ServiceName
.Replace("._tcp", "")
.Replace("._udp", "")
.TrimStart('_');
HostName = $"{InstanceName}.{simpleServiceName}.{Domain}";
Resources.Add(new SRVRecord
{
Name = fqn,
Port = port,
Target = HostName
});
Resources.Add(new TXTRecord
{
Name = fqn,
Strings = { "txtvers=1" }
});
foreach (var address in addresses ?? MulticastService.GetLinkLocalAddresses())
{
Resources.Add(AddressRecord.Create(HostName, address));
}
servicePtrRecord = new PTRRecord {
Name = ServiceName, DomainName = QualifiedServiceName, TTL = TimeSpan.FromSeconds(ttl)
};
instancePtrRecord = new PTRRecord {
Name = QualifiedServiceName, DomainName = FullyQualifiedName, TTL = TimeSpan.FromSeconds(ttl)
};
}