Java 类org.xbill.DNS.Type 实例源码

项目：xTun-android 文件：Utils.java

public static String resolve(String host, int addrType) {
    try {
        Lookup lookup = new Lookup(host, addrType);
        SimpleResolver resolver = new SimpleResolver("114.114.114.114");
        resolver.setTimeout(5);
        lookup.setResolver(resolver);
        Record[] result = lookup.run();
        if (result == null) return null;

        List<Record> records = java.util.Arrays.asList(result);
        java.util.Collections.shuffle(records);
        for (Record record : records) {
            if (addrType == Type.A) {
                return ((ARecord) record).getAddress().getHostAddress();
            } else if (addrType == Type.AAAA) {
                return ((AAAARecord) record).getAddress().getHostAddress();
            }
        }

    } catch (Exception ex) {
        return null;
    }

    return null;
}

项目：open-rmbt 文件：Helperfunctions.java

public static String reverseDNSLookup(final InetAddress adr)
{
    try
    {
        final Name name = ReverseMap.fromAddress(adr);

        final Lookup lookup = new Lookup(name, Type.PTR);
        lookup.setResolver(new SimpleResolver());
        lookup.setCache(null);
        final Record[] records = lookup.run();
        if (lookup.getResult() == Lookup.SUCCESSFUL)
            for (final Record record : records)
                if (record instanceof PTRRecord)
                {
                    final PTRRecord ptr = (PTRRecord) record;
                    return ptr.getTarget().toString();
                }
    }
    catch (final Exception e)
    {
    }
    return null;
}

项目：openvisualtraceroute 文件：DNSLookupService.java

/**
 * Dns lookup more efficient than the INetAddress.getHostName(ip)
 *
 * @param hostIp
 * @return
 * @throws IOException
 */
public String dnsLookup(final String hostIp) {
    try {
        final Name name = ReverseMap.fromAddress(hostIp);
        final int type = Type.PTR;
        final int dclass = DClass.IN;
        final Record rec = Record.newRecord(name, type, dclass);
        final Message query = Message.newQuery(rec);

        final Message response = _resolver.send(query);

        final Record[] answers = response.getSectionArray(Section.ANSWER);
        if (answers.length > 0) {
            String ret = answers[0].rdataToString();
            if (ret.endsWith(".")) {
                ret = ret.substring(0, ret.length() - 1);
            }
            return ret;
        }
    } catch (final IOException e) {
        LOGGER.warn("Failed to resolve hostname for " + hostIp, e);
    }
    return UNKNOWN_HOST;
}

项目：carrier 文件：MailResolverService.java

/**
 * Attempts to resolve an SMTP server address, given the destination e-mail address.
 *
 * @param email The e-mail address used for the lookup.
 * @return An optional, potentially containing
 */
protected Optional<String> resolve(String email) {
    Optional<String> domainOptional = extractDomain(email);

    if (!domainOptional.isPresent()) {
        return Optional.empty();
    }

    String mailDomain = domainOptional.get();

    try {
        Lookup dnsLookup = new Lookup(mailDomain, Type.MX);
        List<Record> records = Arrays.asList(dnsLookup.run());

        if (records.isEmpty()) {
            return Optional.empty();
        }

        return chooseBestRecord(records);

    } catch (TextParseException e) {
        e.printStackTrace();
    }

    return Optional.empty();
}

项目：Dream-Catcher 文件：DnsJavaResolver.java

@Override
public Collection<InetAddress> resolveRemapped(String remappedHost) {
    // special case for IP literals: return the InetAddress without doing a dnsjava lookup. dnsjava seems to handle ipv4 literals
    // reasonably well, but does not handle ipv6 literals (with or without [] brackets) correctly.
    // note this does not work properly for ipv6 literals with a scope identifier, which is a known issue for InetAddresses.isInetAddress().
    // (dnsjava also handles the situation incorrectly)
    if (InetAddresses.isInetAddress(remappedHost)) {
        return Collections.singletonList(InetAddresses.forString(remappedHost));
    }

    // retrieve IPv4 addresses, then retrieve IPv6 addresses only if no IPv4 addresses are found. the current implementation always uses the
    // first returned address, so there is no need to look for IPv6 addresses if an IPv4 address is found.
    Collection<InetAddress> ipv4addresses = resolveHostByType(remappedHost, Type.A);

    if (!ipv4addresses.isEmpty()) {
        return ipv4addresses;
    } else {
        return resolveHostByType(remappedHost, Type.AAAA);
    }
}