/*
* $Id$
*
* Copyright (C) 2003-2015 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.command.net;
import java.io.PrintWriter;
import java.net.InetAddress;
import java.net.UnknownHostException;
import javax.naming.NameNotFoundException;
import org.jnode.driver.ApiNotFoundException;
import org.jnode.driver.Device;
import org.jnode.driver.DeviceManager;
import org.jnode.driver.DeviceNotFoundException;
import org.jnode.driver.net.NetDeviceAPI;
import org.jnode.driver.net.NetworkException;
import org.jnode.naming.InitialNaming;
import org.jnode.net.ProtocolAddressInfo;
import org.jnode.net.ethernet.EthernetConstants;
import org.jnode.net.ipv4.config.IPv4ConfigurationService;
import org.jnode.shell.AbstractCommand;
import org.jnode.shell.syntax.Argument;
import org.jnode.shell.syntax.DeviceArgument;
/**
* @author markhale
* @author crawley@jnode.org
*/
public class DhcpCommand extends AbstractCommand {
private static final String help_device = "the network interface device to be configured";
private static final String help_super = "Configure a network interface using DHCP";
private static final String err_loopback = "The loopback network device is not bound to IP address 127.0.0.1%n" +
"Run 'ifconfig loopback 127.0.0.1 255.255.255.255' to fix this.%n";
private static final String fmt_config = "Configuring network device %s...%n";
private final DeviceArgument argDevice;
public DhcpCommand() {
super(help_super);
argDevice = new DeviceArgument("device", Argument.MANDATORY, help_device, NetDeviceAPI.class);
registerArguments(argDevice);
}
public static void main(String[] args) throws Exception {
new DhcpCommand().execute(args);
}
public void execute() throws DeviceNotFoundException, NameNotFoundException, ApiNotFoundException,
UnknownHostException, NetworkException {
final Device dev = argDevice.getValue();
// The DHCP network configuration process will attempt to configure the DNS. This will only work if
// the IP address 127.0.0.1 is bound to the loopback network interface. And if there isn't, JNode's
// network layer is left in a state that will require a reboot to unjam it (AFAIK).
//
// So, check that loopback is correctly bound ...
Device loopback = (InitialNaming.lookup(DeviceManager.NAME)).getDevice("loopback");
NetDeviceAPI api = loopback.getAPI(NetDeviceAPI.class);
ProtocolAddressInfo info = api.getProtocolAddressInfo(EthernetConstants.ETH_P_IP);
if (info == null || !info.contains(InetAddress.getByAddress(new byte[]{127, 0, 0, 1}))) {
PrintWriter err = getError().getPrintWriter();
err.format(err_loopback);
exit(1);
}
// Now it should be safe to do the DHCP configuration.
getOutput().getPrintWriter().format(fmt_config, dev.getId());
final IPv4ConfigurationService cfg = InitialNaming.lookup(IPv4ConfigurationService.NAME);
cfg.configureDeviceDhcp(dev, true);
}
}