/*
* $Id$
*
* Copyright (C) 2003-2014 JNode.org
*
* This library 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 2.1 of the License, or
* (at your option) any later version.
*
* This library 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 this library; If not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
package org.jnode.net.ipv4.config.impl;
import java.net.UnknownHostException;
import java.util.Collection;
import org.jnode.driver.ApiNotFoundException;
import org.jnode.driver.Device;
import org.jnode.driver.DeviceUtils;
import org.jnode.driver.net.NetDeviceAPI;
import org.jnode.driver.net.NetworkException;
import org.jnode.net.ethernet.EthernetConstants;
import org.jnode.net.ipv4.IPv4Address;
import org.jnode.net.ipv4.IPv4ProtocolAddressInfo;
/**
* Utility class for implementing ifconfig.
*
* @author epr
*/
final class Ifconfig {
/**
* Sets the default IP address of a network device
*
* @param device
* @param address
* @param netmask
*/
public static void setDefault(Device device, IPv4Address address, IPv4Address netmask)
throws NetworkException {
final NetDeviceAPI api;
try {
api = device.getAPI(NetDeviceAPI.class);
} catch (ApiNotFoundException ex) {
throw new NetworkException("Device is not a network device", ex);
}
if (netmask == null) {
netmask = address.getDefaultSubnetmask();
}
IPv4ProtocolAddressInfo addrInfo =
(IPv4ProtocolAddressInfo) api.getProtocolAddressInfo(EthernetConstants.ETH_P_IP);
if (addrInfo == null) {
addrInfo = new IPv4ProtocolAddressInfo(address, netmask);
api.setProtocolAddressInfo(EthernetConstants.ETH_P_IP, addrInfo);
} else {
addrInfo.add(address, netmask);
addrInfo.setDefaultAddress(address, netmask);
}
}
/**
* Gets the default address of the first configured network device.
*
* @return The local address
* @throws UnknownHostException No local address could be found
*/
public static IPv4Address getLocalAddress() throws UnknownHostException {
final Collection<Device> devices = DeviceUtils.getDevicesByAPI(NetDeviceAPI.class);
for (Device dev : devices) {
try {
final NetDeviceAPI api = dev.getAPI(NetDeviceAPI.class);
final IPv4ProtocolAddressInfo addrInfo =
(IPv4ProtocolAddressInfo) api.getProtocolAddressInfo(EthernetConstants.ETH_P_IP);
if (addrInfo != null) {
final IPv4Address addr = (IPv4Address) addrInfo.getDefaultAddress();
if (addr != null) {
return addr;
}
}
} catch (ApiNotFoundException ex) {
// Strange, but ignore
}
}
throw new UnknownHostException("No configured address found");
}
}