META-INF.modules.java.base.classes.sun.net.util.IPAddressUtil Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of java.base Show documentation
Show all versions of java.base Show documentation
Bytecoder java.base Module
/*
* 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 sun.net.util;
import java.io.IOException;
import java.io.UncheckedIOException;
import java.net.Inet6Address;
import java.net.InetAddress;
import java.net.InetSocketAddress;
import java.net.NetworkInterface;
import java.net.SocketException;
import java.net.URL;
import java.security.AccessController;
import java.security.PrivilegedExceptionAction;
import java.security.PrivilegedActionException;
import java.util.Arrays;
import java.util.List;
import java.util.concurrent.ConcurrentHashMap;
import java.util.stream.Collectors;
public class IPAddressUtil {
private static final int INADDR4SZ = 4;
private static final int INADDR16SZ = 16;
private static final 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
*/
@SuppressWarnings("fallthrough")
public static byte[] textToNumericFormatV4(String src)
{
byte[] res = new byte[INADDR4SZ];
long tmpValue = 0;
int currByte = 0;
boolean newOctet = true;
int len = src.length();
if (len == 0 || len > 15) {
return null;
}
/*
* When only one part is given, the value is stored directly in
* the network address without any byte rearrangement.
*
* 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.
*
* 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.
*
* 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.
*
* We determine and parse the leading parts, if any, as single
* byte values in one pass directly into the resulting byte[],
* then the remainder is treated as a 8-to-32-bit entity and
* translated into the remaining bytes in the array.
*/
for (int i = 0; i < len; i++) {
char c = src.charAt(i);
if (c == '.') {
if (newOctet || tmpValue < 0 || tmpValue > 0xff || currByte == 3) {
return null;
}
res[currByte++] = (byte) (tmpValue & 0xff);
tmpValue = 0;
newOctet = true;
} else {
int digit = Character.digit(c, 10);
if (digit < 0) {
return null;
}
tmpValue *= 10;
tmpValue += digit;
newOctet = false;
}
}
if (newOctet || tmpValue < 0 || tmpValue >= (1L << ((4 - currByte) * 8))) {
return null;
}
switch (currByte) {
case 0:
res[0] = (byte) ((tmpValue >> 24) & 0xff);
case 1:
res[1] = (byte) ((tmpValue >> 16) & 0xff);
case 2:
res[2] = (byte) ((tmpValue >> 8) & 0xff);
case 3:
res[3] = (byte) ((tmpValue >> 0) & 0xff);
}
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, i.e. 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 boolean 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;
}
/**
* Mapping from unscoped local Inet(6)Address to the same address
* including the correct scope-id, determined from NetworkInterface.
*/
private final static ConcurrentHashMap
cache = new ConcurrentHashMap<>();
/**
* Returns a scoped version of the supplied local, link-local ipv6 address
* if that scope-id can be determined from local NetworkInterfaces.
* If the address already has a scope-id or if the address is not local, ipv6
* or link local, then the original address is returned.
*
* @param addr
* @exception SocketException if the given ipv6 link local address is found
* on more than one local interface
* @return
*/
public static InetAddress toScopedAddress(InetAddress address)
throws SocketException {
if (address instanceof Inet6Address && address.isLinkLocalAddress()
&& ((Inet6Address) address).getScopeId() == 0) {
InetAddress cached = null;
try {
cached = cache.computeIfAbsent(address, k -> findScopedAddress(k));
} catch (UncheckedIOException e) {
throw (SocketException)e.getCause();
}
return cached != null ? cached : address;
} else {
return address;
}
}
/**
* Same as above for InetSocketAddress
*/
public static InetSocketAddress toScopedAddress(InetSocketAddress address)
throws SocketException {
InetAddress addr;
InetAddress orig = address.getAddress();
if ((addr = toScopedAddress(orig)) == orig) {
return address;
} else {
return new InetSocketAddress(addr, address.getPort());
}
}
private static InetAddress findScopedAddress(InetAddress address) {
PrivilegedExceptionAction> pa = () -> NetworkInterface.networkInterfaces()
.flatMap(NetworkInterface::inetAddresses)
.filter(a -> (a instanceof Inet6Address)
&& address.equals(a)
&& ((Inet6Address) a).getScopeId() != 0)
.collect(Collectors.toList());
List result;
try {
result = AccessController.doPrivileged(pa);
var sz = result.size();
if (sz == 0)
return null;
if (sz > 1)
throw new UncheckedIOException(new SocketException(
"Duplicate link local addresses: must specify scope-id"));
return result.get(0);
} catch (PrivilegedActionException pae) {
return null;
}
}
// See java.net.URI for more details on how to generate these
// masks.
//
// square brackets
private static final long L_IPV6_DELIMS = 0x0L; // "[]"
private static final long H_IPV6_DELIMS = 0x28000000L; // "[]"
// RFC 3986 gen-delims
private static final long L_GEN_DELIMS = 0x8400800800000000L; // ":/?#[]@"
private static final long H_GEN_DELIMS = 0x28000001L; // ":/?#[]@"
// These gen-delims can appear in authority
private static final long L_AUTH_DELIMS = 0x400000000000000L; // "@[]:"
private static final long H_AUTH_DELIMS = 0x28000001L; // "@[]:"
// colon is allowed in userinfo
private static final long L_COLON = 0x400000000000000L; // ":"
private static final long H_COLON = 0x0L; // ":"
// slash should be encoded in authority
private static final long L_SLASH = 0x800000000000L; // "/"
private static final long H_SLASH = 0x0L; // "/"
// backslash should always be encoded
private static final long L_BACKSLASH = 0x0L; // "\"
private static final long H_BACKSLASH = 0x10000000L; // "\"
// ASCII chars 0-31 + 127 - various controls + CRLF + TAB
private static final long L_NON_PRINTABLE = 0xffffffffL;
private static final long H_NON_PRINTABLE = 0x8000000000000000L;
// All of the above
private static final long L_EXCLUDE = 0x84008008ffffffffL;
private static final long H_EXCLUDE = 0x8000000038000001L;
private static final char[] OTHERS = {
8263,8264,8265,8448,8449,8453,8454,10868,
65109,65110,65119,65131,65283,65295,65306,65311,65312
};
// Tell whether the given character is found by the given mask pair
public static boolean match(char c, long lowMask, long highMask) {
if (c < 64)
return ((1L << c) & lowMask) != 0;
if (c < 128)
return ((1L << (c - 64)) & highMask) != 0;
return false; // other non ASCII characters are not filtered
}
// returns -1 if the string doesn't contain any characters
// from the mask, the index of the first such character found
// otherwise.
public static int scan(String s, long lowMask, long highMask) {
int i = -1, len;
if (s == null || (len = s.length()) == 0) return -1;
boolean match = false;
while (++i < len && !(match = match(s.charAt(i), lowMask, highMask)));
if (match) return i;
return -1;
}
public static int scan(String s, long lowMask, long highMask, char[] others) {
int i = -1, len;
if (s == null || (len = s.length()) == 0) return -1;
boolean match = false;
char c, c0 = others[0];
while (++i < len && !(match = match((c=s.charAt(i)), lowMask, highMask))) {
if (c >= c0 && (Arrays.binarySearch(others, c) > -1)) {
match = true; break;
}
}
if (match) return i;
return -1;
}
private static String describeChar(char c) {
if (c < 32 || c == 127) {
if (c == '\n') return "LF";
if (c == '\r') return "CR";
return "control char (code=" + (int)c + ")";
}
if (c == '\\') return "'\\'";
return "'" + c + "'";
}
private static String checkUserInfo(String str) {
// colon is permitted in user info
int index = scan(str, L_EXCLUDE & ~L_COLON,
H_EXCLUDE & ~H_COLON);
if (index >= 0) {
return "Illegal character found in user-info: "
+ describeChar(str.charAt(index));
}
return null;
}
private static String checkHost(String str) {
int index;
if (str.startsWith("[") && str.endsWith("]")) {
str = str.substring(1, str.length() - 1);
if (isIPv6LiteralAddress(str)) {
index = str.indexOf('%');
if (index >= 0) {
index = scan(str = str.substring(index),
L_NON_PRINTABLE | L_IPV6_DELIMS,
H_NON_PRINTABLE | H_IPV6_DELIMS);
if (index >= 0) {
return "Illegal character found in IPv6 scoped address: "
+ describeChar(str.charAt(index));
}
}
return null;
}
return "Unrecognized IPv6 address format";
} else {
index = scan(str, L_EXCLUDE, H_EXCLUDE);
if (index >= 0) {
return "Illegal character found in host: "
+ describeChar(str.charAt(index));
}
}
return null;
}
private static String checkAuth(String str) {
int index = scan(str,
L_EXCLUDE & ~L_AUTH_DELIMS,
H_EXCLUDE & ~H_AUTH_DELIMS);
if (index >= 0) {
return "Illegal character found in authority: "
+ describeChar(str.charAt(index));
}
return null;
}
// check authority of hierarchical URL. Appropriate for
// HTTP-like protocol handlers
public static String checkAuthority(URL url) {
String s, u, h;
if (url == null) return null;
if ((s = checkUserInfo(u = url.getUserInfo())) != null) {
return s;
}
if ((s = checkHost(h = url.getHost())) != null) {
return s;
}
if (h == null && u == null) {
return checkAuth(url.getAuthority());
}
return null;
}
// minimal syntax checks - deeper check may be performed
// by the appropriate protocol handler
public static String checkExternalForm(URL url) {
String s;
if (url == null) return null;
int index = scan(s = url.getUserInfo(),
L_NON_PRINTABLE | L_SLASH,
H_NON_PRINTABLE | H_SLASH);
if (index >= 0) {
return "Illegal character found in authority: "
+ describeChar(s.charAt(index));
}
if ((s = checkHostString(url.getHost())) != null) {
return s;
}
return null;
}
public static String checkHostString(String host) {
if (host == null) return null;
int index = scan(host,
L_NON_PRINTABLE | L_SLASH,
H_NON_PRINTABLE | H_SLASH,
OTHERS);
if (index >= 0) {
return "Illegal character found in host: "
+ describeChar(host.charAt(index));
}
return null;
}
}
© 2015 - 2025 Weber Informatics LLC | Privacy Policy