Examples with ExtendedResolver org.xbill.DNS.ExtendedResolver used on opensource projects

Example 6 with ExtendedResolver

use of org.xbill.DNS.ExtendedResolver in project nhin-d by DirectProject.

the class DNSConnectionTest method performLookup.

private static void performLookup() throws Exception {
    // turn on debug settings for the DNS client
    Options.set("verbose", "true");
    Cache ch = Lookup.getDefaultCache(DClass.IN);
    ch.clearCache();
    if (servers == null || servers.length == 0)
        servers = ResolverConfig.getCurrentConfig().servers();
    System.out.println("\r\nConfigure DNS resolvers:");
    for (String server : servers) {
        System.out.println("\t" + server);
    }
    System.out.println("\r\nLookup up record " + lookupRec);
    Lookup lu = new Lookup(new Name(lookupRec), recType);
    ExtendedResolver resolver = new ExtendedResolver(servers);
    resolver.setTCP(useTCP);
    lu.setResolver(resolver);
    Record[] retRecords = lu.run();
    if (retRecords != null && retRecords.length > 0)
        System.out.println(retRecords.length + " records found.");
    else
        System.out.println("No records found.");
}

Example 7 with ExtendedResolver

use of org.xbill.DNS.ExtendedResolver in project opennms by OpenNMS.

the class DNSResolutionMonitor method poll.

@Override
public PollStatus poll(MonitoredService svc, Map<String, Object> parameters) {
    // Get the name to query for
    final Name name;
    try {
        name = new Name(svc.getNodeLabel());
    } catch (final TextParseException e) {
        return PollStatus.unavailable("Invalid record name '" + svc.getNodeLabel() + "': " + e.getMessage());
    }
    // Determine if records for IPv4 and/or IPv6 re required
    final String resolutionType = ParameterMap.getKeyedString(parameters, PARM_RESOLUTION_TYPE, PARM_RESOLUTION_TYPE_DEFAULT);
    final boolean ipv4Required = PARM_RESOLUTION_TYPE_V4.equalsIgnoreCase(resolutionType) || PARM_RESOLUTION_TYPE_BOTH.equals(resolutionType);
    final boolean ipv6Required = PARM_RESOLUTION_TYPE_V6.equalsIgnoreCase(resolutionType) || PARM_RESOLUTION_TYPE_BOTH.equals(resolutionType);
    // Build a resolver object used for lookups
    final String nameserver = ParameterMap.getKeyedString(parameters, PARM_NAMESERVER, null);
    final Resolver resolver;
    try {
        if (nameserver == null) {
            // Use system-defined resolvers
            resolver = new ExtendedResolver();
        } else {
            resolver = new SimpleResolver(nameserver);
        }
    } catch (final UnknownHostException e) {
        return PollStatus.unavailable("Unable to resolve nameserver '" + nameserver + "': " + e.getMessage());
    }
    // Start resolving the records
    final long start = System.currentTimeMillis();
    // Resolve the name
    final boolean ipv4Found = resolve(name, resolver, Type.A);
    final boolean ipv6Found = resolve(name, resolver, Type.AAAA);
    // Resolving succeeded - checking results
    final long end = System.currentTimeMillis();
    // Check if result is valid
    if (!ipv4Found && !ipv6Found) {
        return PollStatus.unavailable("Unable to resolve host '" + name + "'");
    } else if (ipv4Required && !ipv4Found) {
        return PollStatus.unavailable("'" + name + "' could be resolved to an IPv6 address (AAAA record) but not an IPv4 address (A record)");
    } else if (ipv6Required && !ipv6Found) {
        return PollStatus.unavailable("'" + name + "' could be resolved to an IPv4 address (A record) but not an IPv6 address (AAAA record)");
    } else {
        return PollStatus.available((double) (end - start));
    }
}

Example 8 with ExtendedResolver

use of org.xbill.DNS.ExtendedResolver in project jmeter by apache.

the class DNSCacheManager method createResolver.

/**
     * @return {@link Resolver}
     */
private Resolver createResolver() {
    CollectionProperty dnsServers = getServers();
    try {
        String[] serverNames = new String[dnsServers.size()];
        int index = 0;
        for (JMeterProperty jMeterProperty : dnsServers) {
            serverNames[index] = jMeterProperty.getStringValue();
            index++;
        }
        ExtendedResolver result = new ExtendedResolver(serverNames);
        if (log.isDebugEnabled()) {
            log.debug("Using DNS Resolvers: {}", Arrays.asList((result).getResolvers()));
        }
        // resolvers will be chosen via round-robin
        result.setLoadBalance(true);
        return result;
    } catch (UnknownHostException uhe) {
        this.initFailed = true;
        log.warn("Failed to create Extended resolver: {}", uhe.getMessage(), uhe);
        return null;
    }
}

Example 9 with ExtendedResolver

use of org.xbill.DNS.ExtendedResolver in project camel by apache.

the class DnsRecordConverter method toRecord.

/**
     * @param ip, like "192.168.1.1"
     * @return the complete DNS record for that IP.
     */
@Converter
public static Record toRecord(String ip) throws IOException {
    Resolver res = new ExtendedResolver();
    Name name = ReverseMap.fromAddress(ip);
    int type = Type.PTR;
    int dclass = DClass.IN;
    Record rec = Record.newRecord(name, type, dclass);
    Message query = Message.newQuery(rec);
    Message response = res.send(query);
    Record[] answers = response.getSectionArray(Section.ANSWER);
    if (answers.length == 0) {
        return null;
    } else {
        return answers[0];
    }
}

Example 10 with ExtendedResolver

use of org.xbill.DNS.ExtendedResolver in project nhin-d by DirectProject.

the class DNSConnectionTest method testDNSSocketConnectionUDPWithProxyStore.

public void testDNSSocketConnectionUDPWithProxyStore() throws Exception {
    DNSServerSettings settings = new DNSServerSettings();
    settings.setPort(AvailablePortFinder.getNextAvailable(1024));
    DNSServer server = new DNSServer(new ProxyDNSStore(), settings);
    server.start();
    // give the server a couple seconds to start
    Thread.sleep(2000);
    // turn on debug settings for the DNS client
    Options.set("verbose", "true");
    Lookup lu = new Lookup(new Name("google.com"), Type.A);
    ExtendedResolver resolver = new ExtendedResolver(IPUtils.getDNSLocalIps());
    resolver.setTCP(false);
    resolver.setPort(settings.getPort());
    // default retries is 3, limite to 2
    lu.setResolver(resolver);
    Record[] retRecords = lu.run();
    assertNotNull(retRecords);
    server.stop();
    Thread.sleep(2000);
}