org.xbill.DNS.spi
Class DNSJavaNameService

java.lang.Object
  org.xbill.DNS.spi.DNSJavaNameService

All Implemented Interfaces:

sun.net.spi.nameservice.NameService

public class DNSJavaNameService
extends Object
implements sun.net.spi.nameservice.NameService

This class implements a Name Service Provider, which Java can use (starting with version 1.4), to perform DNS resolutions instead of using the standard calls.

This Name Service Provider uses dnsjava.

To use this provider, you must set the following system propery: sun.net.spi.nameservice.provider.1=dns,dnsjava

Author:

Brian Wellington, Paul Cowan (pwc21@yahoo.com)

Constructor Summary

protected

DNSJavaNameService() Creates a DNSJavaNameService instance.

Method Summary

String	getHostByAddr(byte[] addr) Performs a reverse DNS lookup.
InetAddress[]	lookupAllHostAddr(String host) Performs a forward DNS lookup for the host name.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

DNSJavaNameService

protected DNSJavaNameService()

Creates a DNSJavaNameService instance.

Uses the sun.net.spi.nameservice.nameservers, sun.net.spi.nameservice.domain, and java.net.preferIPv6Addresses properties for configuration.

Method Detail

lookupAllHostAddr

public InetAddress[] lookupAllHostAddr(String host)
                                throws UnknownHostException

Performs a forward DNS lookup for the host name.

Specified by:

lookupAllHostAddr in interface sun.net.spi.nameservice.NameService

Parameters:

host - The host name to resolve.

Returns:

All the ip addresses found for the host name.

Throws:

UnknownHostException

getHostByAddr

public String getHostByAddr(byte[] addr)
                     throws UnknownHostException

Performs a reverse DNS lookup.

Specified by:

getHostByAddr in interface sun.net.spi.nameservice.NameService

Parameters:

addr - The ip address to lookup.

Returns:

The host name found for the ip address.

Throws:

UnknownHostException