/* * Copyright (c) 2004, 2005, 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 sun.net.util;public class IPAddressUtil { private final static int INADDR4SZ = 4; private final static int INADDR16SZ = 16; private final static int INT16SZ = 2; /* * Converts IPv4 address in its textual presentation form * into its numeric binary form. * * @param src a String representing an IPv4 address in standard format * @return a byte array representing the IPv4 numeric address */ public static byte[] textToNumericFormatV4(String src) { if (src.length() == 0) { return null; } byte[] res = new byte[INADDR4SZ]; String[] s = src.split("\\.", -1); long val; try { switch(s.length) { case 1: /* * When only one part is given, the value is stored directly in * the network address without any byte rearrangement. */ val = Long.parseLong(s[0]); if (val < 0 || val > 0xffffffffL) return null; res[0] = (byte) ((val >> 24) & 0xff); res[1] = (byte) (((val & 0xffffff) >> 16) & 0xff); res[2] = (byte) (((val & 0xffff) >> 8) & 0xff); res[3] = (byte) (val & 0xff); break; case 2: /* * When a two part address is supplied, the last part is * interpreted as a 24-bit quantity and placed in the right * most three bytes of the network address. This makes the * two part address format convenient for specifying Class A * network addresses as net.host. */ val = Integer.parseInt(s[0]); if (val < 0 || val > 0xff) return null; res[0] = (byte) (val & 0xff); val = Integer.parseInt(s[1]); if (val < 0 || val > 0xffffff) return null; res[1] = (byte) ((val >> 16) & 0xff); res[2] = (byte) (((val & 0xffff) >> 8) &0xff); res[3] = (byte) (val & 0xff); break; case 3: /* * When a three part address is specified, the last part is * interpreted as a 16-bit quantity and placed in the right * most two bytes of the network address. This makes the * three part address format convenient for specifying * Class B net- work addresses as 128.net.host. */ for (int i = 0; i < 2; i++) { val = Integer.parseInt(s[i]); if (val < 0 || val > 0xff) return null; res[i] = (byte) (val & 0xff); } val = Integer.parseInt(s[2]); if (val < 0 || val > 0xffff) return null; res[2] = (byte) ((val >> 8) & 0xff); res[3] = (byte) (val & 0xff); break; case 4: /* * When four parts are specified, each is interpreted as a * byte of data and assigned, from left to right, to the * four bytes of an IPv4 address. */ for (int i = 0; i < 4; i++) { val = Integer.parseInt(s[i]); if (val < 0 || val > 0xff) return null; res[i] = (byte) (val & 0xff); } break; default: return null; } } catch(NumberFormatException e) { return null; } return res; } /* * Convert IPv6 presentation level address to network order binary form. * credit: * Converted from C code from Solaris 8 (inet_pton) * * Any component of the string following a per-cent % is ignored. * * @param src a String representing an IPv6 address in textual format * @return a byte array representing the IPv6 numeric address */ public static byte[] textToNumericFormatV6(String src) { // Shortest valid string is "::", hence at least 2 chars if (src.length() < 2) { return null; } int colonp; char ch; boolean saw_xdigit; int val; char[] srcb = src.toCharArray(); byte[] dst = new byte[INADDR16SZ]; int srcb_length = srcb.length; int pc = src.indexOf ("%"); if (pc == srcb_length -1) { return null; } if (pc != -1) { srcb_length = pc; } colonp = -1; int i = 0, j = 0; /* Leading :: requires some special handling. */ if (srcb[i] == ':') if (srcb[++i] != ':') return null; int curtok = i; saw_xdigit = false; val = 0; while (i < srcb_length) { ch = srcb[i++]; int chval = Character.digit(ch, 16); if (chval != -1) { val <<= 4; val |= chval; if (val > 0xffff) return null; saw_xdigit = true; continue; } if (ch == ':') { curtok = i; if (!saw_xdigit) { if (colonp != -1) return null; colonp = j; continue; } else if (i == srcb_length) { return null; } if (j + INT16SZ > INADDR16SZ) return null; dst[j++] = (byte) ((val >> 8) & 0xff); dst[j++] = (byte) (val & 0xff); saw_xdigit = false; val = 0; continue; } if (ch == '.' && ((j + INADDR4SZ) <= INADDR16SZ)) { String ia4 = src.substring(curtok, srcb_length); /* check this IPv4 address has 3 dots, ie. A.B.C.D */ int dot_count = 0, index=0; while ((index = ia4.indexOf ('.', index)) != -1) { dot_count ++; index ++; } if (dot_count != 3) { return null; } byte[] v4addr = textToNumericFormatV4(ia4); if (v4addr == null) { return null; } for (int k = 0; k < INADDR4SZ; k++) { dst[j++] = v4addr[k]; } saw_xdigit = false; break; /* '\0' was seen by inet_pton4(). */ } return null; } if (saw_xdigit) { if (j + INT16SZ > INADDR16SZ) return null; dst[j++] = (byte) ((val >> 8) & 0xff); dst[j++] = (byte) (val & 0xff); } if (colonp != -1) { int n = j - colonp; if (j == INADDR16SZ) return null; for (i = 1; i <= n; i++) { dst[INADDR16SZ - i] = dst[colonp + n - i]; dst[colonp + n - i] = 0; } j = INADDR16SZ; } if (j != INADDR16SZ) return null; byte[] newdst = convertFromIPv4MappedAddress(dst); if (newdst != null) { return newdst; } else { return dst; } } /** * @param src a String representing an IPv4 address in textual format * @return a boolean indicating whether src is an IPv4 literal address */ public static boolean isIPv4LiteralAddress(String src) { return textToNumericFormatV4(src) != null; } /** * @param src a String representing an IPv6 address in textual format * @return a boolean indicating whether src is an IPv6 literal address */ public static boolean isIPv6LiteralAddress(String src) { return textToNumericFormatV6(src) != null; } /* * Convert IPv4-Mapped address to IPv4 address. Both input and * returned value are in network order binary form. * * @param src a String representing an IPv4-Mapped address in textual format * @return a byte array representing the IPv4 numeric address */ public static byte[] convertFromIPv4MappedAddress(byte[] addr) { if (isIPv4MappedAddress(addr)) { byte[] newAddr = new byte[INADDR4SZ]; System.arraycopy(addr, 12, newAddr, 0, INADDR4SZ); return newAddr; } return null; } /** * 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) && (addr[5] == 0x00) && (addr[6] == 0x00) && (addr[7] == 0x00) && (addr[8] == 0x00) && (addr[9] == 0x00) && (addr[10] == (byte)0xff) && (addr[11] == (byte)0xff)) { return true; } return false; }}
/*
* Copyright (c) 2004, 2005, 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 sun.net.util;
public class IPAddressUtil {
private final static int INADDR4SZ = 4;
private final static int INADDR16SZ = 16;
private final static int INT16SZ = 2;
/*
* Converts IPv4 address in its textual presentation form
* into its numeric binary form.
*
* @param src a String representing an IPv4 address in standard format
* @return a byte array representing the IPv4 numeric address
*/
public static byte[] textToNumericFormatV4(String src)
{
if (src.length() == 0) {
return null;
}
byte[] res = new byte[INADDR4SZ];
String[] s = src.split("\\.", -1);
long val;
try {
switch(s.length) {
case 1:
/*
* When only one part is given, the value is stored directly in
* the network address without any byte rearrangement.
*/
val = Long.parseLong(s[0]);
if (val < 0 || val > 0xffffffffL)
return null;
res[0] = (byte) ((val >> 24) & 0xff);
res[1] = (byte) (((val & 0xffffff) >> 16) & 0xff);
res[2] = (byte) (((val & 0xffff) >> 8) & 0xff);
res[3] = (byte) (val & 0xff);
break;
case 2:
/*
* When a two part address is supplied, the last part is
* interpreted as a 24-bit quantity and placed in the right
* most three bytes of the network address. This makes the
* two part address format convenient for specifying Class A
* network addresses as net.host.
*/
val = Integer.parseInt(s[0]);
if (val < 0 || val > 0xff)
return null;
res[0] = (byte) (val & 0xff);
val = Integer.parseInt(s[1]);
if (val < 0 || val > 0xffffff)
return null;
res[1] = (byte) ((val >> 16) & 0xff);
res[2] = (byte) (((val & 0xffff) >> 8) &0xff);
res[3] = (byte) (val & 0xff);
break;
case 3:
/*
* When a three part address is specified, the last part is
* interpreted as a 16-bit quantity and placed in the right
* most two bytes of the network address. This makes the
* three part address format convenient for specifying
* Class B net- work addresses as 128.net.host.
*/
for (int i = 0; i < 2; i++) {
val = Integer.parseInt(s[i]);
if (val < 0 || val > 0xff)
return null;
res[i] = (byte) (val & 0xff);
}
val = Integer.parseInt(s[2]);
if (val < 0 || val > 0xffff)
return null;
res[2] = (byte) ((val >> 8) & 0xff);
res[3] = (byte) (val & 0xff);
break;
case 4:
/*
* When four parts are specified, each is interpreted as a
* byte of data and assigned, from left to right, to the
* four bytes of an IPv4 address.
*/
for (int i = 0; i < 4; i++) {
val = Integer.parseInt(s[i]);
if (val < 0 || val > 0xff)
return null;
res[i] = (byte) (val & 0xff);
}
break;
default:
return null;
}
} catch(NumberFormatException e) {
return null;
}
return res;
}
/*
* Convert IPv6 presentation level address to network order binary form.
* credit:
* Converted from C code from Solaris 8 (inet_pton)
*
* Any component of the string following a per-cent % is ignored.
*
* @param src a String representing an IPv6 address in textual format
* @return a byte array representing the IPv6 numeric address
*/
public static byte[] textToNumericFormatV6(String src)
{
// Shortest valid string is "::", hence at least 2 chars
if (src.length() < 2) {
return null;
}
int colonp;
char ch;
boolean saw_xdigit;
int val;
char[] srcb = src.toCharArray();
byte[] dst = new byte[INADDR16SZ];
int srcb_length = srcb.length;
int pc = src.indexOf ("%");
if (pc == srcb_length -1) {
return null;
}
if (pc != -1) {
srcb_length = pc;
}
colonp = -1;
int i = 0, j = 0;
/* Leading :: requires some special handling. */
if (srcb[i] == ':')
if (srcb[++i] != ':')
return null;
int curtok = i;
saw_xdigit = false;
val = 0;
while (i < srcb_length) {
ch = srcb[i++];
int chval = Character.digit(ch, 16);
if (chval != -1) {
val <<= 4;
val |= chval;
if (val > 0xffff)
return null;
saw_xdigit = true;
continue;
}
if (ch == ':') {
curtok = i;
if (!saw_xdigit) {
if (colonp != -1)
return null;
colonp = j;
continue;
} else if (i == srcb_length) {
return null;
}
if (j + INT16SZ > INADDR16SZ)
return null;
dst[j++] = (byte) ((val >> 8) & 0xff);
dst[j++] = (byte) (val & 0xff);
saw_xdigit = false;
val = 0;
continue;
}
if (ch == '.' && ((j + INADDR4SZ) <= INADDR16SZ)) {
String ia4 = src.substring(curtok, srcb_length);
/* check this IPv4 address has 3 dots, ie. A.B.C.D */
int dot_count = 0, index=0;
while ((index = ia4.indexOf ('.', index)) != -1) {
dot_count ++;
index ++;
}
if (dot_count != 3) {
return null;
}
byte[] v4addr = textToNumericFormatV4(ia4);
if (v4addr == null) {
return null;
}
for (int k = 0; k < INADDR4SZ; k++) {
dst[j++] = v4addr[k];
}
saw_xdigit = false;
break; /* '\0' was seen by inet_pton4(). */
}
return null;
}
if (saw_xdigit) {
if (j + INT16SZ > INADDR16SZ)
return null;
dst[j++] = (byte) ((val >> 8) & 0xff);
dst[j++] = (byte) (val & 0xff);
}
if (colonp != -1) {
int n = j - colonp;
if (j == INADDR16SZ)
return null;
for (i = 1; i <= n; i++) {
dst[INADDR16SZ - i] = dst[colonp + n - i];
dst[colonp + n - i] = 0;
}
j = INADDR16SZ;
}
if (j != INADDR16SZ)
return null;
byte[] newdst = convertFromIPv4MappedAddress(dst);
if (newdst != null) {
return newdst;
} else {
return dst;
}
}
/**
* @param src a String representing an IPv4 address in textual format
* @return a boolean indicating whether src is an IPv4 literal address
*/
public static boolean isIPv4LiteralAddress(String src) {
return textToNumericFormatV4(src) != null;
}
/**
* @param src a String representing an IPv6 address in textual format
* @return a boolean indicating whether src is an IPv6 literal address
*/
public static boolean isIPv6LiteralAddress(String src) {
return textToNumericFormatV6(src) != null;
}
/*
* Convert IPv4-Mapped address to IPv4 address. Both input and
* returned value are in network order binary form.
*
* @param src a String representing an IPv4-Mapped address in textual format
* @return a byte array representing the IPv4 numeric address
*/
public static byte[] convertFromIPv4MappedAddress(byte[] addr) {
if (isIPv4MappedAddress(addr)) {
byte[] newAddr = new byte[INADDR4SZ];
System.arraycopy(addr, 12, newAddr, 0, INADDR4SZ);
return newAddr;
}
return null;
}
/**
* 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) && (addr[5] == 0x00) &&
(addr[6] == 0x00) && (addr[7] == 0x00) &&
(addr[8] == 0x00) && (addr[9] == 0x00) &&
(addr[10] == (byte)0xff) &&
(addr[11] == (byte)0xff)) {
return true;
}
return false;
}
}