org.openqa.selenium.net.NetworkInterface.java Source code

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Here is the source code for org.openqa.selenium.net.NetworkInterface.java

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// Licensed to the Software Freedom Conservancy (SFC) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The SFC 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.openqa.selenium.net;

import static java.util.Collections.list;

import com.google.common.collect.Iterables;

import java.net.Inet6Address;
import java.net.InetAddress;
import java.net.SocketException;
import java.util.Arrays;
import java.util.Iterator;
import java.util.logging.Level;
import java.util.logging.Logger;

public class NetworkInterface {

    private final String name;
    private java.net.NetworkInterface networkInterface;
    private final Iterable<InetAddress> inetAddresses;
    private Boolean isLoopback;

    public NetworkInterface(java.net.NetworkInterface networkInterface) {
        this(networkInterface.getName(), list(networkInterface.getInetAddresses()));
        this.networkInterface = networkInterface;
    }

    NetworkInterface(String name, Iterable<InetAddress> inetAddresses) {
        this.name = name;
        this.inetAddresses = Iterables.unmodifiableIterable(inetAddresses);
    }

    NetworkInterface(String name, InetAddress... inetAddresses) {
        this(name, Arrays.asList(inetAddresses));
        this.isLoopback = isLoopBackFromINetAddresses(this.inetAddresses);
    }

    public boolean isIp4AddressBindingOnly() {
        return getIp6Address() == null;
    }

    public boolean isLoopBack() {
        if (isLoopback == null) {
            if (networkInterface != null) {
                try {
                    // Issue 1181 : determine whether this NetworkInterface instance is loopback
                    // from java.net.NetworkInterface API
                    isLoopback = networkInterface.isLoopback();
                } catch (SocketException ex) {
                    Logger.getLogger(NetworkInterface.class.getName()).log(Level.WARNING, null, ex);
                }
            }
            // If a SocketException is caught, determine whether this NetworkInterface
            // instance is loopback from computation from its inetAddresses
            if (isLoopback == null) {
                isLoopback = isLoopBackFromINetAddresses(list(networkInterface.getInetAddresses()));
            }
        }
        return isLoopback;
    }

    private boolean isLoopBackFromINetAddresses(Iterable<InetAddress> inetAddresses) {
        // Let's hope there's no such thing as network interfaces with mixed addresses ;)
        Iterator<InetAddress> iterator = inetAddresses.iterator();
        return iterator.hasNext() && iterator.next().isLoopbackAddress();
    }

    public InetAddress getIp4LoopbackOnly() {
        // Goes by the wildly unscientific assumption that if there are more than one set of
        // loopback addresses, firefox will bind to the last one we get.
        // An alternate theory if this fails is that firefox prefers 127.0.0.1
        // Most "normal" boxes don't have multiple addresses so we'll just refine this
        // algorithm until it works.
        // See NetworkUtilsTest#testOpenSuseBoxIssue1181
        // Issue 1181
        if (!isLoopBack()) {
            return null;
        }
        InetAddress lastFound = null;
        for (InetAddress inetAddress : inetAddresses) {
            if (inetAddress.isLoopbackAddress() && !isIpv6(inetAddress)) {
                lastFound = inetAddress;
            }
        }
        return lastFound;
    }

    static boolean isIpv6(InetAddress address) {
        return address instanceof Inet6Address;
    }

    public InetAddress getIp4NonLoopBackOnly() {
        for (InetAddress inetAddress : inetAddresses) {
            if (!inetAddress.isLoopbackAddress() && !isIpv6(inetAddress)) {
                return inetAddress;
            }
        }
        return null;
    }

    public InetAddress getIp6Address() {
        for (InetAddress inetAddress : inetAddresses) {
            if (isIpv6(inetAddress)) {
                return inetAddress;
            }
        }
        return null;
    }

    public Iterable<InetAddress> getInetAddresses() {
        return inetAddresses;
    }

    public String getName() {
        return name;
    }
}