import org.xbill.DNS.NSRecord; //导入依赖的package包/类
private RRset makeNameServerSet(DomainResource domain) {
  RRset nameServerSet = new RRset();
  for (String hostName : domain.loadNameserverFullyQualifiedHostNames()) {
    NSRecord record =
        new NSRecord(
            toAbsoluteName(domain.getFullyQualifiedDomainName()),
            DClass.IN,
            dnsDefaultNsTtl.getStandardSeconds(),
            toAbsoluteName(hostName));
    nameServerSet.addRR(record);
  }
  return nameServerSet;
}
 

import org.xbill.DNS.NSRecord; //导入依赖的package包/类
@Test
public void canResolveRecord() throws Exception {
    AcceptanceTestRunner runner = new AcceptanceTestRunner();
    runner.runUngarded(new AcceptanceScenario() {

        public void run(WebDriver driver, String deployedURL) throws Exception {
            int id = new SecureRandom().nextInt();
            final String systemTestBase = "system-tests.onomate.test";
            final String soaBase = "soa-" + id +"."+ systemTestBase;
            final String ns = "ns." + soaBase;
            final String contactName = "admin." + soaBase;
            final String aTestRecordHost = "record."+soaBase;
            final String aTestRecordNS = "ns.test";

            OnomateAssembly assembly = new OnomateAssembly(driver, deployedURL);
            OnomateAssembly.Dashboard board = assembly.gotoLanding().authenticate().newAuthority(soaBase, ns, contactName);
            board.authorityByZone(soaBase).details().createRecord(aTestRecordHost, OnomateAssembly.RecordType.NS, aTestRecordNS);

            Options.set("verbose");
            
            SimpleResolver resolver = new SimpleResolver();
            resolver.setAddress(InetAddress.getLocalHost());
            resolver.setPort(9101);
            
            Record query = Record.newRecord(Name.fromString(aTestRecordHost + "."), Type.NS, DClass.IN);
            Message question = Message.newQuery(query);
            Message response = resolver.send(question);
            Record responses[] = response.getSectionArray(Section.AUTHORITY);
            NSRecord record = ((NSRecord) responses[0]);
            assertEquals(record.getName().toString(), aTestRecordHost+ ".");
            assertEquals(record.getTarget().toString(), aTestRecordNS + ".");
        }
    });
}
 

import org.xbill.DNS.NSRecord; //导入依赖的package包/类
private Message lookup(Set<Name> stack, String[] addresses, Message query) throws IOException {
	Message msg = getCached(query);
	if (msg != null)
		return msg;

	if (addresses == null)
		return null;
	Resolver resolver = createResolver(addresses);
	try {
		msg = resolver.send(query);
	} catch (IOException e) {
		return null;
	}
	if (msg == null)
		return null;

	// Found the authoritative answer
	if (msg.getHeader().getFlag(Flags.AA))
		return msg;

	Record[] authority = msg.getSectionArray(Section.AUTHORITY);
	for (Record record : authority) {
		if (Type.NS == record.getType()) {
			Name nameserver = ((NSRecord)record).getTarget();

			// Try to find glue for the record first
			Record[] additional = msg.getSectionArray(Section.ADDITIONAL);
			addresses = findAddresses(nameserver, additional);

			if (stack.contains(nameserver)) // Loop - cannot go there
				continue;
			stack.add(nameserver);
			if (stack.size() > MAX_RECURSION_STACK) // Prevent recursion spinning out of control
				return null;

			// No glue found - lookup target recursively
			if (addresses == null)
				addresses = findAddressesRecursive(stack, nameserver);

			// Chase down to the next level
			Message resp = lookup(stack, addresses, query);
			if (resp != null) {
				addCached(resp);
				return resp;
			}
		}
	}

	return null; // Just couldn't do it
}
 

import org.xbill.DNS.NSRecord; //导入依赖的package包/类
/** {@inheritDoc} */
@Override
public void beforeTestMethod(final TestContext testContext) throws Exception {
    super.beforeTestMethod(testContext);

    final JUnitDNSServer config = findTestAnnotation(JUnitDNSServer.class, testContext);

    if (config == null) {
        return;
    }

    LogUtils.infof(this, "initializing DNS on port %d", config.port());

    m_server = new DNSServer();
    m_server.addPort(config.port());

    for (final DNSZone dnsZone : config.zones()) {
        String name = dnsZone.name();
        if (!name.endsWith(".")) {
            name = name + ".";
        }
        final Name zoneName = Name.fromString(name, Name.root);
        LogUtils.debugf(this, "zoneName = %s", zoneName);
        final Zone zone = new Zone(zoneName, new Record[] {
                new SOARecord(zoneName, DClass.IN, DEFAULT_TTL, zoneName, Name.fromString("admin." + name), 1, DEFAULT_TTL, DEFAULT_TTL, DEFAULT_TTL, DEFAULT_TTL),
                new NSRecord(zoneName, DClass.IN, DEFAULT_TTL, Name.fromString("resolver1.opendns.com.")),
                new NSRecord(zoneName, DClass.IN, DEFAULT_TTL, Name.fromString("resolver2.opendns.com.")),
                new ARecord(zoneName, DClass.IN, DEFAULT_TTL, InetAddressUtils.addr(dnsZone.v4address())),
                new AAAARecord(zoneName, DClass.IN, DEFAULT_TTL, InetAddressUtils.addr(dnsZone.v6address()))
        });
        LogUtils.debugf(this, "zone = %s", zone);

        for (final DNSEntry entry : dnsZone.entries()) {
            LogUtils.debugf(this, "adding entry: %s", entry);
            String hostname = entry.hostname();
            final Name recordName = Name.fromString(hostname, zoneName);
            LogUtils.debugf(this, "name = %s", recordName);
            if (entry.ipv6()) {
                zone.addRecord(new AAAARecord(recordName, DClass.IN, DEFAULT_TTL, InetAddressUtils.addr(entry.address())));
            } else {
                zone.addRecord(new ARecord(recordName, DClass.IN, DEFAULT_TTL, InetAddressUtils.addr(entry.address())));
            }
        }

        m_server.addZone(zone);
    }

    LogUtils.debugf(this, "starting DNS server");
    m_server.start();
    try {
        Thread.sleep(50);
    } catch (final InterruptedException e) {
        LogUtils.debugf(this, e, "interrupted while waiting for server to come up");
        Thread.currentThread().interrupt();
    }
}
 

import org.xbill.DNS.NSRecord; //导入依赖的package包/类
public static NSRecord getNSRecord(String domainName) {
    return null;
}
 

import org.xbill.DNS.NSRecord; //导入依赖的package包/类
public NSRecord getNSRecord(String domainName) {
    return null;
}