/*
* $Id$
*
* 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.dhcp;
import java.io.IOException;
import java.net.URL;
import java.security.AccessController;
import java.security.PrivilegedAction;
import java.security.PrivilegedActionException;
import java.security.PrivilegedExceptionAction;
import javax.naming.NameNotFoundException;
import org.apache.log4j.Logger;
import org.jnode.driver.ApiNotFoundException;
import org.jnode.driver.Device;
import org.jnode.driver.net.NetDeviceAPI;
import org.jnode.driver.net.NetworkException;
import org.jnode.naming.InitialNaming;
import org.jnode.net.NetPermission;
import org.jnode.net.ipv4.IPv4Address;
import org.jnode.net.ipv4.bootp.BOOTPHeader;
import org.jnode.net.ipv4.config.IPv4ConfigurationService;
import org.jnode.net.ipv4.util.ResolverImpl;
import org.jnode.plugin.PluginManager;
import org.jnode.plugin.URLPluginLoader;
/**
* Console DHCP client.
*
* @author markhale
* @author Martin Husted Hartvig (hagar@jnode.org)
*/
public class DHCPClient extends AbstractDHCPClient {
private static final Logger log = Logger.getLogger(DHCPClient.class);
private Device device;
private NetDeviceAPI api;
/**
* Configure the given device using BOOTP
*
* @param device
*/
public final void configureDevice(final Device device) throws IOException {
this.device = device;
final SecurityManager sm = System.getSecurityManager();
if (sm != null) {
sm.checkPermission(new NetPermission("dhcpClient"));
}
try {
AccessController.doPrivileged(new PrivilegedExceptionAction<Object>() {
public Object run() throws IOException {
// Get the API.
try {
api = device.getAPI(NetDeviceAPI.class);
} catch (ApiNotFoundException ex) {
throw new NetworkException("Device is not a network device", ex);
}
configureDevice(device.getId(), api.getAddress());
return null;
}
});
} catch (PrivilegedActionException ex) {
throw (IOException) ex.getException();
}
this.api = null;
this.device = null;
}
/**
* Performs the actual configuration of a network device based on the
* settings in a DHCP message.
*/
protected void doConfigure(DHCPMessage msg) throws IOException {
super.doConfigure(msg);
final IPv4ConfigurationService cfg;
try {
cfg = InitialNaming.lookup(IPv4ConfigurationService.NAME);
} catch (NameNotFoundException ex) {
throw new NetworkException(ex);
}
BOOTPHeader hdr = msg.getHeader();
cfg.configureDeviceStatic(device, new IPv4Address(hdr
.getYourIPAddress()), null, false);
final IPv4Address serverAddr = new IPv4Address(hdr.getServerIPAddress());
final IPv4Address networkAddress = serverAddr.and(serverAddr.getDefaultSubnetmask());
if (hdr.getGatewayIPAddress().isAnyLocalAddress()) {
cfg.addRoute(serverAddr, null, device, false);
cfg.addRoute(networkAddress, null, device, false);
} else {
cfg.addRoute(networkAddress, new IPv4Address(hdr.getGatewayIPAddress()), device, false);
}
byte[] routerValue = msg.getOption(DHCPMessage.ROUTER_OPTION);
if (routerValue != null && routerValue.length >= 4) {
IPv4Address routerIP = new IPv4Address(routerValue, 0);
log.info("Got Router IP address : " + routerIP);
cfg.addRoute(IPv4Address.ANY, routerIP, device, false);
}
// find the dns servers and add to the resolver
final byte[] dnsValue = msg.getOption(DHCPMessage.DNS_OPTION);
if (dnsValue != null) {
for (int i = 0; i < dnsValue.length; i += 4) {
final IPv4Address dnsIP = new IPv4Address(dnsValue, i);
log.info("Got Dns IP address : " + dnsIP);
try {
ResolverImpl.addDnsServer(dnsIP);
} catch (Throwable ex) {
log.error("Failed to configure DNS server");
log.debug("Failed to configure DNS server", ex);
}
}
}
// Find the plugin loader option
final byte[] pluginLoaderValue = msg.getOption(DHCPMessage.PLUGIN_LOADER_OPTION);
if (pluginLoaderValue != null) {
final String pluginLoaderURL = new String(pluginLoaderValue, "UTF8");
log.info("Got plugin loader url : " + pluginLoaderURL);
AccessController.doPrivileged(new PrivilegedAction<Object>() {
public Object run() {
try {
final PluginManager pm = InitialNaming.lookup(PluginManager.class);
pm.getLoaderManager().addPluginLoader(new URLPluginLoader(new URL(pluginLoaderURL)));
} catch (Throwable ex) {
log.error("Failed to configure plugin loader");
log.debug("Failed to configure plugin loader", ex);
}
return null;
}
});
}
}
}