Java 实用程序例程，检查InetAddress是否是IPv4映射的IPv6地址。

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实用程序例程，检查InetAddress是否是IPv4映射的IPv6地址。

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* 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.  Oracle designates this

* particular file as subject to the "Classpath" exception as provided

* by Oracle in the LICENSE file that accompanied this code.

* 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.

* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

* or visit www.oracle.com if you need additional information or have any

* questions.

//package com.nowjava;

public class Main {/** n  o  w  j  a  v  a . c o m 提 供 **/

public static void main(String[] argv) throws Exception {

byte[] addr = new byte[] { 34, 35, 36, 37, 37, 37, 67, 68, 69 };

System.out.println(isIPv4MappedAddress(addr));

}

private static final int INADDR16SZ = 16;

/**

* Utility routine to check if the InetAddress is an

* IPv4 mapped IPv6 address.

* @return a <code>boolean</code> indicating if the InetAddress is

* an IPv4 mapped IPv6 address; or false if address is IPv4 address.

private static boolean isIPv4MappedAddress(byte[] addr) {

if (addr.length < INADDR16SZ) {

return false;

}

if ((addr[0] == 0x00) && (addr[1] == 0x00) && (addr[2] == 0x00)

&& (addr[3] == 0x00) && (addr[4] == 0x00)
/**代码未完, 请加载全部代码(NowJava.com).**/

​x
 
​
/*
​
 * Copyright (c) 2004, 2015, 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.  Oracle designates this
​
 * particular file as subject to the "Classpath" exception as provided
​
 * by Oracle in the LICENSE file that accompanied this code.
​
 *
​
 * 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.
​
 *
​
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
​
 * or visit www.oracle.com if you need additional information or have any
​
 * questions.
​
 */
​
//package com.nowjava;
​
​
public class Main {/** n  o  w  j  a  v  a . c o m 提 供 **/
​
    public static void main(String[] argv) throws Exception {
​
        byte[] addr = new byte[] { 34, 35, 36, 37, 37, 37, 67, 68, 69 };
​
        System.out.println(isIPv4MappedAddress(addr));
​
    }
​
​
    private static final int INADDR16SZ = 16;
​
​
    /**
​
     * Utility routine to check if the InetAddress is an
​
     * IPv4 mapped IPv6 address.
​
     *
​
     * @return a <code>boolean</code> indicating if the InetAddress is
​
     * an IPv4 mapped IPv6 address; or false if address is IPv4 address.
​
     */
​
    private static boolean isIPv4MappedAddress(byte[] addr) {
​
        if (addr.length < INADDR16SZ) {
​
            return false;
​
        }
​
        if ((addr[0] == 0x00) && (addr[1] == 0x00) && (addr[2] == 0x00)
​
                && (addr[3] == 0x00) && (addr[4] == 0x00)
/**代码未完, 请加载全部代码(NowJava.com).**/