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@ -3,345 +3,19 @@
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*
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* Distributable under LGPL license.
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* See terms of license at gnu.org.
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*
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* This file is heavily based on SUN's IPAddressUtil that was distributed under
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* the following license:
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/*
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* Copyright 2004-2005 Sun Microsystems, Inc. All Rights Reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Sun designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Sun in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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* CA 95054 USA or visit www.sun.com if you need additional information or
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* have any questions.
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*/
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package net.java.sip.communicator.util;
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/**
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* Contains utility methods for work with IPv4 and IPv6 addresses.
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* <p>
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* TODO Rewrite to not depend on sun.net.util.IPAddressUtil.
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* </p>
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*
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* @author Alan Kelly
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* @author Lubomir Marinov
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*/
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public class IPAddressUtil
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extends sun.net.util.IPAddressUtil
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{
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private final static int INADDR4SZ = 4;
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private final static int INADDR16SZ = 16;
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private final static int INT16SZ = 2;
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/*
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* Converts IPv4 address in its textual presentation form
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* into its numeric binary form.
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*
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* @param src a String representing an IPv4 address in standard format
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* @return a byte array representing the IPv4 numeric address
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*/
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public static byte[] textToNumericFormatV4(String src)
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{
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if (src.length() == 0)
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{
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return null;
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}
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byte[] res = new byte[INADDR4SZ];
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String[] s = src.split("\\.", -1);
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long val;
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try
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{
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switch(s.length)
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{
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case 1:
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/*
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* When only one part is given, the value is stored directly in
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* the network address without any byte rearrangement.
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*/
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val = Long.parseLong(s[0]);
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if (val < 0 || val > 0xffffffffL)
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return null;
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res[0] = (byte) ((val >> 24) & 0xff);
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res[1] = (byte) (((val & 0xffffff) >> 16) & 0xff);
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res[2] = (byte) (((val & 0xffff) >> 8) & 0xff);
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res[3] = (byte) (val & 0xff);
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break;
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case 2:
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/*
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* When a two part address is supplied, the last part is
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* interpreted as a 24-bit quantity and placed in the right
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* most three bytes of the network address. This makes the
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* two part address format convenient for specifying Class A
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* network addresses as net.host.
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*/
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val = Integer.parseInt(s[0]);
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if (val < 0 || val > 0xff)
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return null;
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res[0] = (byte) (val & 0xff);
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val = Integer.parseInt(s[1]);
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if (val < 0 || val > 0xffffff)
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return null;
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res[1] = (byte) ((val >> 16) & 0xff);
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res[2] = (byte) (((val & 0xffff) >> 8) &0xff);
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res[3] = (byte) (val & 0xff);
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break;
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case 3:
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/*
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* When a three part address is specified, the last part is
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* interpreted as a 16-bit quantity and placed in the right
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* most two bytes of the network address. This makes the
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* three part address format convenient for specifying
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* Class B net- work addresses as 128.net.host.
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*/
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for (int i = 0; i < 2; i++) {
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val = Integer.parseInt(s[i]);
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if (val < 0 || val > 0xff)
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return null;
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res[i] = (byte) (val & 0xff);
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}
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val = Integer.parseInt(s[2]);
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if (val < 0 || val > 0xffff)
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return null;
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res[2] = (byte) ((val >> 8) & 0xff);
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res[3] = (byte) (val & 0xff);
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break;
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case 4:
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/*
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* When four parts are specified, each is interpreted as a
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* byte of data and assigned, from left to right, to the
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* four bytes of an IPv4 address.
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*/
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for (int i = 0; i < 4; i++) {
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val = Integer.parseInt(s[i]);
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if (val < 0 || val > 0xff)
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return null;
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res[i] = (byte) (val & 0xff);
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}
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break;
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default:
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return null;
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}
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}
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catch(NumberFormatException e)
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{
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return null;
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}
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return res;
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}
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/*
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* Convert IPv6 presentation level address to network order binary form.
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* credit:
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* Converted from C code from Solaris 8 (inet_pton)
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*
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* Any component of the string following a per-cent % is ignored.
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*
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* @param src a String representing an IPv6 address in textual format
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* @return a byte array representing the IPv6 numeric address
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*/
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public static byte[] textToNumericFormatV6(String src)
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{
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// Shortest valid string is "::", hence at least 2 chars
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if (src.length() < 2)
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{
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return null;
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}
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int colonp;
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char ch;
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boolean saw_xdigit;
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int val;
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char[] srcb = src.toCharArray();
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byte[] dst = new byte[INADDR16SZ];
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int srcb_length = srcb.length;
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int pc = src.indexOf ("%");
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if (pc == srcb_length -1)
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{
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return null;
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}
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if (pc != -1)
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{
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srcb_length = pc;
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}
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colonp = -1;
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int i = 0, j = 0;
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/* Leading :: requires some special handling. */
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if (srcb[i] == ':')
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if (srcb[++i] != ':')
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return null;
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int curtok = i;
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saw_xdigit = false;
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val = 0;
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while (i < srcb_length)
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{
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ch = srcb[i++];
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int chval = Character.digit(ch, 16);
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if (chval != -1)
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{
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val <<= 4;
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val |= chval;
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if (val > 0xffff)
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return null;
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saw_xdigit = true;
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continue;
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}
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if (ch == ':')
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{
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curtok = i;
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if (!saw_xdigit)
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{
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if (colonp != -1)
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return null;
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colonp = j;
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continue;
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} else if (i == srcb_length) {
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return null;
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}
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if (j + INT16SZ > INADDR16SZ)
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return null;
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dst[j++] = (byte) ((val >> 8) & 0xff);
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dst[j++] = (byte) (val & 0xff);
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saw_xdigit = false;
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val = 0;
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continue;
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}
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if (ch == '.' && ((j + INADDR4SZ) <= INADDR16SZ))
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{
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String ia4 = src.substring(curtok, srcb_length);
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/* check this IPv4 address has 3 dots, ie. A.B.C.D */
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int dot_count = 0, index=0;
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while ((index = ia4.indexOf ('.', index)) != -1)
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{
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dot_count ++;
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index ++;
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}
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if (dot_count != 3)
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{
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return null;
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}
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byte[] v4addr = textToNumericFormatV4(ia4);
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if (v4addr == null)
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{
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return null;
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}
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for (int k = 0; k < INADDR4SZ; k++)
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{
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dst[j++] = v4addr[k];
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}
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saw_xdigit = false;
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break; /* '\0' was seen by inet_pton4(). */
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}
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return null;
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}
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if (saw_xdigit)
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{
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if (j + INT16SZ > INADDR16SZ)
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return null;
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dst[j++] = (byte) ((val >> 8) & 0xff);
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dst[j++] = (byte) (val & 0xff);
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}
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if (colonp != -1)
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{
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int n = j - colonp;
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if (j == INADDR16SZ)
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return null;
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for (i = 1; i <= n; i++)
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{
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dst[INADDR16SZ - i] = dst[colonp + n - i];
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dst[colonp + n - i] = 0;
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}
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j = INADDR16SZ;
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}
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if (j != INADDR16SZ)
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return null;
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byte[] newdst = convertFromIPv4MappedAddress(dst);
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if (newdst != null)
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{
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return newdst;
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}
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else
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{
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return dst;
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}
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}
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/**
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* @param src a String representing an IPv4 address in textual format
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* @return a boolean indicating whether src is an IPv4 literal address
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*/
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public static boolean isIPv4LiteralAddress(String src)
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{
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return textToNumericFormatV4(src) != null;
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}
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/**
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* @param src a String representing an IPv6 address in textual format
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* @return a boolean indicating whether src is an IPv6 literal address
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*/
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public static boolean isIPv6LiteralAddress(String src)
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{
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return textToNumericFormatV6(src) != null;
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}
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/*
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* Convert IPv4-Mapped address to IPv4 address. Both input and
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* returned value are in network order binary form.
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*
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* @param src a String representing an IPv4-Mapped address in textual format
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* @return a byte array representing the IPv4 numeric address
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*/
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public static byte[] convertFromIPv4MappedAddress(byte[] addr)
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{
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if (isIPv4MappedAddress(addr))
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{
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byte[] newAddr = new byte[INADDR4SZ];
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System.arraycopy(addr, 12, newAddr, 0, INADDR4SZ);
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return newAddr;
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}
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return null;
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}
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/**
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* Utility routine to check if the InetAddress is an
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* IPv4 mapped IPv6 address.
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*
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* @return a <code>boolean</code> indicating if the InetAddress is
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* an IPv4 mapped IPv6 address; or false if address is IPv4 address.
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*/
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private static boolean isIPv4MappedAddress(byte[] addr)
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{
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if (addr.length < INADDR16SZ)
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{
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return false;
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}
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if ((addr[0] == 0x00) && (addr[1] == 0x00) &&
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(addr[2] == 0x00) && (addr[3] == 0x00) &&
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(addr[4] == 0x00) && (addr[5] == 0x00) &&
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(addr[6] == 0x00) && (addr[7] == 0x00) &&
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(addr[8] == 0x00) && (addr[9] == 0x00) &&
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(addr[10] == (byte)0xff) &&
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(addr[11] == (byte)0xff)) {
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return true;
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}
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return false;
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}
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}
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Lyubomir Marinov
16 years ago