Package org.dspace.statistics.util

Class DnsLookup

java.lang.Object

org.dspace.statistics.util.DnsLookup

public class DnsLookup
extends Object

XBill DNS resolver to retrieve host names for client IP addresses. TODO: deal with IPv6 addresses.

Author:

kevinvandevelde at atmire.com, ben at atmire.com

Method Summary

Modifier and Type	Method	Description
static String	forward(String hostname)	Resolve a host name to an IPv4 address.
static String	reverseDns(String hostIp)	Resolve an IP address to a host name.

Methods inherited from class java.lang.Object

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

Method Details

reverseDns

public static String reverseDns(String hostIp)
                         throws IOException

Resolve an IP address to a host name.

Parameters:

hostIp - dotted decimal IPv4 address.

Returns:

name if resolved, or the address.

Throws:

IOException - from infrastructure.

forward

public static String forward(String hostname)
                      throws IOException

Resolve a host name to an IPv4 address.

Parameters:

hostname - hostname to resolve to IP

Returns:

IPv4 address

Throws:

IOException - from infrastructure or no resolution.