Java tutorial
/******************************************************************************* *Copyright (c) 2009 Eucalyptus Systems, Inc. * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, only version 3 of the License. * * * This file 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 General Public License * for more details. * * You should have received a copy of the GNU General Public License along * with this program. If not, see <http://www.gnu.org/licenses/>. * * Please contact Eucalyptus Systems, Inc., 130 Castilian * Dr., Goleta, CA 93101 USA or visit <http://www.eucalyptus.com/licenses/> * if you need additional information or have any questions. * * This file may incorporate work covered under the following copyright and * permission notice: * * Software License Agreement (BSD License) * * Copyright (c) 2008, Regents of the University of California * All rights reserved. * * Redistribution and use of this software in source and binary forms, with * or without modification, are permitted provided that the following * conditions are met: * * Redistributions of source code must retain the above copyright notice, * this list of conditions and the following disclaimer. * * Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. USERS OF * THIS SOFTWARE ACKNOWLEDGE THE POSSIBLE PRESENCE OF OTHER OPEN SOURCE * LICENSED MATERIAL, COPYRIGHTED MATERIAL OR PATENTED MATERIAL IN THIS * SOFTWARE, AND IF ANY SUCH MATERIAL IS DISCOVERED THE PARTY DISCOVERING * IT MAY INFORM DR. RICH WOLSKI AT THE UNIVERSITY OF CALIFORNIA, SANTA * BARBARA WHO WILL THEN ASCERTAIN THE MOST APPROPRIATE REMEDY, WHICH IN * THE REGENTS DISCRETION MAY INCLUDE, WITHOUT LIMITATION, REPLACEMENT * OF THE CODE SO IDENTIFIED, LICENSING OF THE CODE SO IDENTIFIED, OR * WITHDRAWAL OF THE CODE CAPABILITY TO THE EXTENT NEEDED TO COMPLY WITH * ANY SUCH LICENSES OR RIGHTS. *******************************************************************************/ /* * Author: chris grzegorczyk <grze@eucalyptus.com> */ package com.eucalyptus.util; import java.io.IOException; import java.net.Inet4Address; import java.net.InetAddress; import java.net.InterfaceAddress; import java.net.NetworkInterface; import java.net.SocketException; import java.net.URI; import java.net.URISyntaxException; import java.net.UnknownHostException; import java.util.Collections; import java.util.Enumeration; import java.util.List; import org.apache.log4j.Logger; import com.google.common.base.Predicate; import com.google.common.collect.Iterables; import com.google.common.collect.Lists; public class NetworkUtil { private static Logger LOG = Logger.getLogger(NetworkUtil.class); public static List<String> getAllAddresses() throws SocketException { List<String> addrs = Lists.newArrayList(); Enumeration<NetworkInterface> ifaces = NetworkInterface.getNetworkInterfaces(); while (ifaces.hasMoreElements()) { NetworkInterface iface = ifaces.nextElement(); for (InterfaceAddress iaddr : iface.getInterfaceAddresses()) { InetAddress addr = iaddr.getAddress(); if (addr instanceof Inet4Address) { if (!addr.isMulticastAddress() && !addr.isLoopbackAddress() && !addr.isLinkLocalAddress() && !addr.isSiteLocalAddress() && !"192.168.122.1".equals(addr.getHostAddress())) { addrs.add(addr.getHostAddress()); } } if (addr instanceof Inet4Address) { if (!addr.isMulticastAddress() && !addr.isLoopbackAddress() && !addr.isLinkLocalAddress() && !addrs.contains(addr.getHostAddress()) && !"192.168.122.1".equals(addr.getHostAddress())) { addrs.add(addr.getHostAddress()); } } } } return addrs; } public static boolean testReachability(String addr) throws Exception { Exceptions.ifNullArgument(addr); InetAddress inetAddr = Inet4Address.getByName(addr); return inetAddr.isReachable(10000); } public static InetAddress toAddress(URI uri) { Exceptions.ifNullArgument(uri); try { return InetAddress.getByName(uri.getHost()); } catch (UnknownHostException e) { throw Exceptions.illegalArgument("Failed to resolve address for host: " + uri.getHost(), e); } } public static InetAddress toAddress(String maybeUrlMaybeHostname) { Exceptions.ifNullArgument(maybeUrlMaybeHostname); if (maybeUrlMaybeHostname.startsWith("vm:")) { maybeUrlMaybeHostname = "localhost"; } URI uri = null; String hostAddress = null; try { uri = new URI(maybeUrlMaybeHostname); hostAddress = uri.getHost(); } catch (URISyntaxException e) { hostAddress = maybeUrlMaybeHostname; } InetAddress ret = null; try { ret = InetAddress.getByName(hostAddress); } catch (UnknownHostException e1) { throw Exceptions.fatal("Failed to resolve address for host: " + maybeUrlMaybeHostname, e1); } return ret; } public static boolean testLocal(final InetAddress addr) { Exceptions.ifNullArgument(addr); try { Boolean result = addr.isAnyLocalAddress(); result |= Iterables.any(Collections.list(NetworkInterface.getNetworkInterfaces()), new Predicate<NetworkInterface>() { @Override public boolean apply(NetworkInterface arg0) { return Iterables.any(arg0.getInterfaceAddresses(), new Predicate<InterfaceAddress>() { @Override public boolean apply(InterfaceAddress arg0) { return arg0.getAddress().equals(addr); } }); } }); return result; } catch (Exception e) { return Exceptions.eat(e.getMessage(), e); } } public static boolean testLocal(String address) { Exceptions.ifNullArgument(address); InetAddress addr; try { addr = InetAddress.getByName(address); return testLocal(addr); } catch (UnknownHostException e) { return Exceptions.eat(e.getMessage(), e); } } public static boolean testGoodAddress(String address) throws Exception { InetAddress addr = InetAddress.getByName(address); LOG.debug(addr + " site=" + addr.isSiteLocalAddress()); LOG.debug(addr + " any=" + addr.isAnyLocalAddress()); LOG.debug(addr + " loop=" + addr.isLoopbackAddress()); LOG.debug(addr + " link=" + addr.isLinkLocalAddress()); LOG.debug(addr + " multi=" + addr.isMulticastAddress()); return addr.isSiteLocalAddress() || (!addr.isAnyLocalAddress() && !addr.isLoopbackAddress() && !addr.isLinkLocalAddress() && !addr.isMulticastAddress()); } public static void main(String[] args) throws Exception { for (String addr : NetworkUtil.getAllAddresses()) { System.out.println(addr); } System.out.println("Testing if 192.168.7.8 is reachable: " + NetworkUtil.testReachability("192.168.7.8")); } }