/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.hadoop.net;
import org.junit.Test;
import org.mortbay.log.Log;
import static org.junit.Assert.*;
import java.net.InetAddress;
import java.net.NetworkInterface;
import java.net.Socket;
import java.net.ConnectException;
import java.net.InetSocketAddress;
import java.net.SocketException;
import java.util.Enumeration;
import org.apache.hadoop.conf.Configuration;
public class TestNetUtils {
/**
* Test that we can't accidentally connect back to the connecting socket due
* to a quirk in the TCP spec.
*
* This is a regression test for HADOOP-6722.
*/
@Test
public void testAvoidLoopbackTcpSockets() throws Exception {
Configuration conf = new Configuration();
Socket socket = NetUtils.getDefaultSocketFactory(conf)
.createSocket();
socket.bind(new InetSocketAddress("127.0.0.1", 0));
System.err.println("local address: " + socket.getLocalAddress());
System.err.println("local port: " + socket.getLocalPort());
try {
NetUtils.connect(socket,
new InetSocketAddress(socket.getLocalAddress(), socket.getLocalPort()),
20000);
socket.close();
fail("Should not have connected");
} catch (ConnectException ce) {
System.err.println("Got exception: " + ce);
assertTrue(ce.getMessage().contains("resulted in a loopback"));
} catch (SocketException se) {
System.err.println("Got exception: " + se);
assertTrue(se.getMessage().startsWith("Invalid argument"));
}
}
/**
* Test local host check.
*/
@Test
public void testLocalhostCheck() throws Exception {
assertTrue(NetUtils.isLocalAddress(InetAddress.getLocalHost()));
Enumeration<NetworkInterface> ifaces = NetworkInterface.getNetworkInterfaces();
while (ifaces.hasMoreElements()) {
NetworkInterface iface = ifaces.nextElement();
Enumeration<InetAddress> addresses = iface.getInetAddresses();
while (addresses.hasMoreElements()) {
InetAddress addr = addresses.nextElement();
assertTrue(NetUtils.isLocalAddress(addr));
}
}
assertTrue(NetUtils.isLocalAddress(InetAddress.getByName("localhost")));
assertTrue(NetUtils.isLocalAddress(InetAddress.getByName("127.0.0.1")));
assertFalse(NetUtils.isLocalAddress(InetAddress.getByName("google.com")));
}
/**
* Test local host check.
*/
@Test
public void testLocalhostCheckWithCaching() throws Exception {
assertTrue(NetUtils.isLocalAddressWithCaching(InetAddress.getLocalHost()));
Enumeration<NetworkInterface> ifaces = NetworkInterface.getNetworkInterfaces();
while (ifaces.hasMoreElements()) {
NetworkInterface iface = ifaces.nextElement();
Enumeration<InetAddress> addresses = iface.getInetAddresses();
while (addresses.hasMoreElements()) {
InetAddress addr = addresses.nextElement();
assertTrue(NetUtils.isLocalAddressWithCaching(addr));
}
}
assertTrue(NetUtils.knownLocalAddrs.containsKey(InetAddress.getLocalHost()));
while (ifaces.hasMoreElements()) {
NetworkInterface iface = ifaces.nextElement();
Enumeration<InetAddress> addresses = iface.getInetAddresses();
while (addresses.hasMoreElements()) {
InetAddress addr = addresses.nextElement();
assertTrue(NetUtils.knownLocalAddrs.containsKey(NetUtils.isLocalAddressWithCaching(addr)));
}
}
assertTrue(NetUtils.isLocalAddressWithCaching(InetAddress.getByName("localhost")));
assertTrue(NetUtils.isLocalAddressWithCaching(InetAddress.getByName("127.0.0.1")));
assertFalse(NetUtils.isLocalAddressWithCaching(InetAddress.getByName("facebook.com")));
}
}