Java ReverseMap类代码示例

import org.xbill.DNS.ReverseMap; //导入依赖的package包/类
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;
}
 

import org.xbill.DNS.ReverseMap; //导入依赖的package包/类
/**
 * 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;
}
 

import org.xbill.DNS.ReverseMap; //导入依赖的package包/类
/**
 * @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];
    }
}
 

import org.xbill.DNS.ReverseMap; //导入依赖的package包/类
private void doUpdate(AdapterOperation op) {
    log().debug("doUpdate: operation: " + op.getType().name());
    for (ReverseDnsRecord record : m_reverseDnsProvisioningAdapterService.get(op.getNodeId()) ) {
        log().debug("doUpdate: ReverseDnsRecord: hostname: " + record.getHostname() + " zone: " + record.getZone() + " ip address: " + record.getIp().getHostAddress());
        try {
            Update update = new Update(Name.fromString(record.getZone()));
            Name ptrRecord=ReverseMap.fromAddress(record.getIp());
            update.replace(ptrRecord, Type.PTR, 3600, record.getHostname());
            m_resolver.send(update);
            m_reverseDnsProvisioningAdapterService.update(op.getNodeId(),record);
        } catch (Exception e) {
            log().error("updateNode: Error handling updated event.", e);
            sendAndThrow(op.getNodeId(), e);
        }
    }
}
 

import org.xbill.DNS.ReverseMap; //导入依赖的package包/类
private static String reverseDnsLookupUsingDnsJavaSimpleResolver(long ipAddress) throws IOException {
    String result = null;
    byte[] address = convertLongAddressToBuf(ipAddress);
    Name name = ReverseMap.fromAddress(InetAddress.getByAddress(address));
    Record record = Record.newRecord(name, Type.PTR, DClass.IN);
    Message query = Message.newQuery(record);
    Message response = simpleResolver.send(query);
    Record[] answers = response.getSectionArray(Section.ANSWER);
    if (answers.length != 0) {
        // If PTR-record exists this will be at index 1 or above (more than one PTR-record may exist)
        Record answer = (answers.length > 1) ? answers[1] : answers[0];  
        result = answer.rdataToString();
        // remove trailing "."
        result = result.endsWith(".") ? result.substring(0, result.length() - 1) : result;
    } else {
        throw new IOException("Empty DNS response.");
    }
    return result;
}
 

import org.xbill.DNS.ReverseMap; //导入依赖的package包/类
/**
 * Performs a reverse DNS lookup.
 * @param addr The ip address to lookup.
 * @return The host name found for the ip address.
 */
public String
getHostByAddr(byte [] addr) throws UnknownHostException {
	Name name = ReverseMap.fromAddress(InetAddress.getByAddress(addr));
	Record [] records = new Lookup(name, Type.PTR).run();
	if (records == null)
		throw new UnknownHostException();
	return ((PTRRecord) records[0]).getTarget().toString();
}
 

import org.xbill.DNS.ReverseMap; //导入依赖的package包/类
/**
 * Performs a reverse DNS lookup.
 * 
 * @param addr
 *            The ip address to lookup.
 * @return The host name found for the ip address.
 */
public String getHostByAddr(byte[] addr) throws UnknownHostException {
	Name name = ReverseMap.fromAddress(InetAddress.getByAddress(addr));
	Record[] records = new Lookup(name, Type.PTR).run();
	if (records == null)
		throw new UnknownHostException();
	return ((PTRRecord) records[0]).getTarget().toString();
}
 

import org.xbill.DNS.ReverseMap; //导入依赖的package包/类
/**
 * @see org.apache.james.dnsservice.api.DNSService#getHostName(java.net.InetAddress)
 */
public String getHostName(InetAddress addr) {
    String result = null;
    Name name = ReverseMap.fromAddress(addr);
    Record[] records = lookupNoException(name.toString(), Type.PTR, "PTR");

    if (records == null) {
        result = addr.getHostAddress();
    } else {
        PTRRecord ptr = (PTRRecord) records[0];
        result = ptr.getTarget().toString();
    }
    return result;
}
 

import org.xbill.DNS.ReverseMap; //导入依赖的package包/类
private static String reverseDnsLookupUsingDnsJavaExtendedResolver(long ipAddress) throws UnknownHostException {
    byte[] address = convertLongAddressToBuf(ipAddress);
    Name name = ReverseMap.fromAddress(InetAddress.getByAddress(address));
    Record[] records = new Lookup(name, Type.PTR).run();
    if (records == null) {
        throw new UnknownHostException();
    }
    String result = ((PTRRecord)records[0]).getTarget().toString();
    // remove trailing "."
    result = result.endsWith(".") ? result.substring(0, result.length() - 1) : result;
    return result;
}