/*
* This file is part of FFMQ.
*
* FFMQ is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* FFMQ is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with FFMQ; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
package net.timewalker.ffmq4.utils;
import java.net.InetAddress;
import java.net.NetworkInterface;
import java.util.Enumeration;
/**
* <p>Inet utilities.</p>
*/
public final class InetUtils
{
public static String findInterfaceAddress( String interfaceName )
{
try
{
Enumeration<NetworkInterface> interfaces = NetworkInterface.getNetworkInterfaces();
if (interfaces != null)
{
while (interfaces.hasMoreElements())
{
NetworkInterface iface = interfaces.nextElement();
if (iface.getName().equals(interfaceName))
{
Enumeration<InetAddress> addresses = iface.getInetAddresses();
if (!addresses.hasMoreElements())
throw new IllegalArgumentException("Network interface "+interfaceName+" has no attached address");
InetAddress address = addresses.nextElement();
return address.getHostAddress();
}
}
}
throw new IllegalArgumentException("No network interface with that name : "+interfaceName);
}
catch (IllegalArgumentException e)
{
throw e;
}
catch (Exception e)
{
throw new IllegalStateException("Cannot find interface address : "+e);
}
}
public static String resolveAutoInterfaceAddress( String address )
{
if (address == null)
return null;
if (address.startsWith("auto:"))
return InetUtils.findInterfaceAddress(address.substring(5));
return address;
}
}