/*
* Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code 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
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
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*/
/* @test
* @bug 7003398
* @run main/othervm Equals
*/
import java.io.ByteArrayOutputStream;
import java.io.PrintStream;
import java.net.InetAddress;
import java.net.NetworkInterface;
import java.net.SocketException;
import java.util.Arrays;
import java.util.Collections;
import java.util.Enumeration;
import java.util.HashMap;
public class Equals {
public static void main(String args[]) throws Exception {
ByteArrayOutputStream baos = new ByteArrayOutputStream();
PrintStream bufferedOut = new PrintStream(baos);
Enumeration<NetworkInterface> nifs1 = NetworkInterface.getNetworkInterfaces();
HashMap<String,Integer> hashes = new HashMap<>();
HashMap<String,NetworkInterface> nicMap = new HashMap<>();
while (nifs1.hasMoreElements()) {
NetworkInterface ni = nifs1.nextElement();
hashes.put(ni.getName(),ni.hashCode());
nicMap.put(ni.getName(),ni);
displayInterfaceInformation(ni, bufferedOut);
bufferedOut.flush();
}
System.setSecurityManager(new SecurityManager());
Enumeration<NetworkInterface> nifs2 = NetworkInterface.getNetworkInterfaces();
while (nifs2.hasMoreElements()) {
NetworkInterface ni = nifs2.nextElement();
NetworkInterface niOrig = nicMap.get(ni.getName());
int h = ni.hashCode();
if (h != hashes.get(ni.getName())) {
System.out.printf("%nSystem information:%n");
System.out.printf("%s", baos.toString("UTF8"));
System.out.printf("%nni.hashCode() returned %d, expected %d, for:%n",
h, hashes.get(ni.getName()));
displayInterfaceInformation(ni, System.out);
throw new RuntimeException("Hashcodes different for " +
ni.getName());
}
if (!ni.equals(niOrig)) {
System.out.printf("%nSystem information:%n");
System.out.printf("%s", baos.toString("UTF8"));
System.out.printf("%nExpected the following interfaces to be the same:%n");
displayInterfaceInformation(niOrig, System.out);
displayInterfaceInformation(ni, System.out);
throw new RuntimeException("equality different for " +
ni.getName());
}
}
}
static void displayInterfaceInformation(NetworkInterface netint,
PrintStream out) throws SocketException {
out.printf("Display name: %s%n", netint.getDisplayName());
out.printf("Name: %s%n", netint.getName());
Enumeration<InetAddress> inetAddresses = netint.getInetAddresses();
for (InetAddress inetAddress : Collections.list(inetAddresses))
out.printf("InetAddress: %s%n", inetAddress);
out.printf("Up? %s%n", netint.isUp());
out.printf("Loopback? %s%n", netint.isLoopback());
out.printf("PointToPoint? %s%n", netint.isPointToPoint());
out.printf("Supports multicast? %s%n", netint.supportsMulticast());
out.printf("Virtual? %s%n", netint.isVirtual());
out.printf("Hardware address: %s%n",
Arrays.toString(netint.getHardwareAddress()));
out.printf("MTU: %s%n", netint.getMTU());
out.printf("Index: %s%n", netint.getIndex());
out.printf("%n");
}
}