Returns true if this address is an IPv6 address, is globally routeable - Android Network

Android examples for Network:IP Address

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Description

Returns true if this address is an IPv6 address, is globally routeable

Demo Code

/*****************************************************************************
 *  Project: Android IPv6Config//www .  j a  v a  2 s .  c o m
 *  Description: Android application to change IPv6 kernel configuration
 *  Author: Ren? Mayrhofer
 *  Copyright: Ren? Mayrhofer, 2011-2014
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 3 
 * as published by the Free Software Foundation.
 *****************************************************************************/
//package com.java2s;

import java.net.Inet6Address;
import java.net.InetAddress;

public class Main {
    /** Returns true if this address is an IPv6 address, is globally routeable (i.e.
     * it is not a link- or site-local address), and has been derived from a MAC
     * address using the EUI scheme.
     */
    public static boolean isIPv6GlobalMacDerivedAddress(InetAddress address) {
        if (address == null || !(address instanceof Inet6Address))
            // only check valid IPv6 addresses
            return false;
        Inet6Address addr6 = (Inet6Address) address;

        if (addr6.isLinkLocalAddress())
            // if it's link-local, it may be MAC-derived, but not privacy sensitive
            return false;

        byte[] addrByte = addr6.getAddress();
        // MAC-derivation adds "FFFE" in the middle of the 48 bits MAC
        return addrByte[11] == (byte) 0xff && addrByte[12] == (byte) 0xfe;
    }
}

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