org.wildfly.naming.client.util.NetworkUtils Maven / Gradle / Ivy
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This artifact provides a single jar that contains all classes required to use remote EJB and JMS, including
all dependencies. It is intended for use by those not using maven, maven users should just import the EJB and
JMS BOM's instead (shaded JAR's cause lots of problems with maven, as it is very easy to inadvertently end up
with different versions on classes on the class path).
/*
* JBoss, Home of Professional Open Source.
* Copyright 2011, Red Hat, Inc., and individual contributors
* as indicated by the @author tags. See the copyright.txt file in the
* distribution for a full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.wildfly.naming.client.util;
import java.net.Inet4Address;
import java.net.Inet6Address;
import java.net.InetAddress;
import java.net.InetSocketAddress;
import java.util.Arrays;
import java.util.Locale;
import org.wildfly.security.manager.WildFlySecurityManager;
/**
* Utility methods related to networking.
*
* @author Brian Stansberry (c) 2011 Red Hat Inc.
*/
public class NetworkUtils {
private static final int MAX_GROUP_LENGTH = 4;
private static final int IPV6_LEN = 8;
private static final boolean can_bind_to_mcast_addr; // are we running on Linux ?
static {
can_bind_to_mcast_addr = checkForLinux() || checkForSolaris() || checkForHp();
}
public static String formatPossibleIpv6Address(String address) {
if(address == null) {
return null;
}
String ipv6Address;
if (address.startsWith("[") && address.endsWith("]")) {
ipv6Address = address.substring(0, address.lastIndexOf(']')).substring(1);
} else {
ipv6Address = address;
}
// Definitely not an IPv6, return untouched input.
if (!mayBeIPv6Address(ipv6Address)) {
return ipv6Address;
}
return '[' + canonize(ipv6Address) + ']';
}
/**
* Convert IPv6 adress into RFC 5952 form.
* E.g. 2001:db8:0:1:0:0:0:1 -> 2001:db8:0:1::1
*
* Method is null safe, and if IPv4 address or host name is passed to the
* method it is returned wihout any processing.
*
* Method also supports IPv4 in IPv6 (e.g. 0:0:0:0:0:ffff:192.0.2.1 ->
* ::ffff:192.0.2.1), and zone ID (e.g. fe80:0:0:0:f0f0:c0c0:1919:1234%4
* -> fe80::f0f0:c0c0:1919:1234%4).
*
* @param ipv6Address String representing valid IPv6 address.
* @return String representing IPv6 in canonical form.
* @throws IllegalArgumentException if IPv6 format is unacceptable.
*/
public static String canonize(String ipv6Address) throws IllegalArgumentException {
if (ipv6Address == null) {
return null;
}
// Definitely not an IPv6, return untouched input.
if (!mayBeIPv6Address(ipv6Address)) {
return ipv6Address;
}
// Length without zone ID (%zone) or IPv4 address
int ipv6AddressLength = ipv6Address.length();
if (isIPv4AddressInIPv6(ipv6Address)) {
// IPv4 in IPv6
// e.g. 0:0:0:0:0:FFFF:127.0.0.1
int lastColonPos = ipv6Address.lastIndexOf(":");
int lastColonsPos = ipv6Address.lastIndexOf("::");
if (lastColonsPos >= 0 && lastColonPos == lastColonsPos + 1) {
// IPv6 part ends with two consecutive colons, last colon is part of IPv6 format.
// e.g. ::127.0.0.1
ipv6AddressLength = lastColonPos + 1;
} else {
// IPv6 part ends with only one colon, last colon is not part of IPv6 format.
// e.g. ::FFFF:127.0.0.1
ipv6AddressLength = lastColonPos;
}
} else if (ipv6Address.contains(":") && ipv6Address.contains("%")) {
// Zone ID
// e.g. fe80:0:0:0:f0f0:c0c0:1919:1234%4
ipv6AddressLength = ipv6Address.lastIndexOf("%");
}
StringBuilder result = new StringBuilder();
char [][] groups = new char[IPV6_LEN][MAX_GROUP_LENGTH];
int groupCounter = 0;
int charInGroupCounter = 0;
// Index of the current zeroGroup, -1 means not found.
int zeroGroupIndex = -1;
int zeroGroupLength = 0;
// maximum length zero group, if there is more then one, then first one
int maxZeroGroupIndex = -1;
int maxZeroGroupLength = 0;
boolean isZero = true;
boolean groupStart = true;
/*
* Two consecutive colons, initial expansion.
* e.g. 2001:db8:0:0:1::1 -> 2001:db8:0:0:1:0:0:1
*/
StringBuilder expanded = new StringBuilder(ipv6Address);
int colonsPos = ipv6Address.indexOf("::");
int length = ipv6AddressLength;
int change = 0;
if (colonsPos >= 0 && colonsPos < ipv6AddressLength - 2) {
int colonCounter = 0;
for (int i = 0; i < ipv6AddressLength; i++) {
if (ipv6Address.charAt(i) == ':') {
colonCounter++;
}
}
if (colonsPos == 0) {
expanded.insert(0, "0");
change = change + 1;
}
for (int i = 0; i < IPV6_LEN - colonCounter; i++) {
expanded.insert(colonsPos + 1, "0:");
change = change + 2;
}
if (colonsPos == ipv6AddressLength - 2) {
expanded.setCharAt(colonsPos + change + 1, '0');
} else {
expanded.deleteCharAt(colonsPos + change + 1);
change = change - 1;
}
length = length + change;
}
// Processing one char at the time
for (int charCounter = 0; charCounter < length; charCounter++) {
char c = expanded.charAt(charCounter);
if (c >= 'A' && c <= 'F') {
c = (char) (c + 32);
}
if (c != ':') {
groups[groupCounter][charInGroupCounter] = c;
if (!(groupStart && c == '0')) {
++charInGroupCounter;
groupStart = false;
}
if (c != '0') {
isZero = false;
}
}
if (c == ':' || charCounter == (length - 1)) {
// We reached end of current group
if (isZero) {
++zeroGroupLength;
if (zeroGroupIndex == -1) {
zeroGroupIndex = groupCounter;
}
}
if (!isZero || charCounter == (length - 1)) {
// We reached end of zero group
if (zeroGroupLength > maxZeroGroupLength) {
maxZeroGroupLength = zeroGroupLength;
maxZeroGroupIndex = zeroGroupIndex;
}
zeroGroupLength = 0;
zeroGroupIndex = -1;
}
++groupCounter;
charInGroupCounter = 0;
isZero = true;
groupStart = true;
}
}
int numberOfGroups = groupCounter;
// Output results
for (groupCounter = 0; groupCounter < numberOfGroups; groupCounter++) {
if (maxZeroGroupLength <= 1 || groupCounter < maxZeroGroupIndex
|| groupCounter >= maxZeroGroupIndex + maxZeroGroupLength) {
for (int j = 0; j < MAX_GROUP_LENGTH; j++) {
if (groups[groupCounter][j] != 0) {
result.append(groups[groupCounter][j]);
}
}
if (groupCounter < (numberOfGroups - 1)
&& (groupCounter != maxZeroGroupIndex - 1
|| maxZeroGroupLength <= 1)) {
result.append(':');
}
} else if (groupCounter == maxZeroGroupIndex) {
result.append("::");
}
}
// Solve problem with three colons in IPv4 in IPv6 format
// e.g. 0:0:0:0:0:0:127.0.0.1 -> :::127.0.0.1 -> ::127.0.0.1
int resultLength = result.length();
if (result.charAt(resultLength - 1) == ':' && ipv6AddressLength < ipv6Address.length()
&& ipv6Address.charAt(ipv6AddressLength) == ':') {
result.delete(resultLength - 1, resultLength);
}
/*
* Append IPv4 from IPv4-in-IPv6 format or Zone ID
*/
for (int i = ipv6AddressLength; i < ipv6Address.length(); i++) {
result.append(ipv6Address.charAt(i));
}
return result.toString();
}
/**
* Heuristic check if string might be an IPv6 address.
*
* @param input Any string or null
* @return true, if input string contains only hex digits and at least two colons, before '.' or '%' character.
*/
private static boolean mayBeIPv6Address(String input) {
if (input == null) {
return false;
}
boolean result = false;
int colonsCounter = 0;
int length = input.length();
for (int i = 0; i < length; i++) {
char c = input.charAt(i);
if (c == '.' || c == '%') {
// IPv4 in IPv6 or Zone ID detected, end of checking.
break;
}
if (!((c >= '0' && c <= '9') || (c >= 'a' && c <= 'f')
|| (c >= 'A' && c <= 'F') || c == ':')) {
return false;
} else if (c == ':') {
colonsCounter++;
}
}
if (colonsCounter >= 2) {
result = true;
}
return result;
}
/**
* Check if it is an IPv4 in IPv6 format.
* e.g. 0:0:0:0:0:FFFF:127.0.0.1
*
* @param ipv6Address the address
* @return true, if input string is an IPv4 address in IPv6 format.
*/
private static boolean isIPv4AddressInIPv6(String ipv6Address) {
return (ipv6Address.contains(":") && ipv6Address.contains("."));
}
/**
* Formats input address. For IPV4 returns simply host address, for IPV6 formats address according to RFC5952 rules. It embeds IPV6 address in '[', ']'.
*
* @param inet
* @return
*/
public static String formatIPAddressForURI(InetAddress inet){
if(inet == null){
throw new IllegalArgumentException();
}
if(inet instanceof Inet4Address){
return inet.getHostAddress();
} else if (inet instanceof Inet6Address){
return '[' + formatAddress(inet) + ']';
} else {
return inet.getHostAddress();
}
}
/**
* Formats input address. For IPV4 returns simply host address, for IPV6 formats address according to RFC5952 rules. It does not embed IPV6 address in '[', ']', since those are part of IPV6 URI literal.
*
* @param inet
* @return
*/
public static String formatAddress(InetAddress inet){
if(inet == null){
throw new IllegalArgumentException();
}
if(inet instanceof Inet4Address){
return inet.getHostAddress();
} else if (inet instanceof Inet6Address){
byte[] byteRepresentation = inet.getAddress();
int[] hexRepresentation = new int[IPV6_LEN];
for(int i=0;i < hexRepresentation.length;i++){
hexRepresentation[i] = ( byteRepresentation[2*i] & 0xFF) << 8 | ( byteRepresentation[2*i+1] & 0xFF );
}
compactLongestZeroSequence(hexRepresentation);
return formatAddress6(hexRepresentation);
} else {
return inet.getHostAddress();
}
}
/**
* Converts socket address into string literal, which has form: 'address:port'. Example:
*
* - 127.0.0.1:8080
* - dns.name.com:8080
* - [0fe:1::20]:8080
* - [::1]:8080
*
* @param inet
* @return
*/
public static String formatAddress(InetSocketAddress inet){
if(inet == null){
throw new NullPointerException();
}
StringBuilder result = new StringBuilder();
if(inet.isUnresolved()){
result.append(inet.getHostName());
}else{
result.append(formatPossibleIpv6Address(formatAddress(inet.getAddress())));
}
result.append(":").append(inet.getPort());
return result.toString();
}
/**
* Converts IPV6 int[] representation into valid IPV6 string literal. Sequence of '-1' values are converted into '::'.
* @param hexRepresentation
* @return
*/
private static String formatAddress6(int[] hexRepresentation){
if(hexRepresentation == null){
throw new NullPointerException();
}
if(hexRepresentation.length != IPV6_LEN){
throw new IllegalArgumentException();
}
StringBuilder stringBuilder = new StringBuilder();
boolean inCompressedSection = false;
for(int i = 0;i bestRunLen){
bestRunStart = runStart;
bestRunLen = runLen;
}
}
}
}
}
if(bestRunStart >=0){
Arrays.fill(hexRepresentatoin, bestRunStart, bestRunStart + bestRunLen, -1);
}
}
private static boolean checkForLinux() {
return checkForPresence("os.name", "linux");
}
private static boolean checkForHp() {
return checkForPresence("os.name", "hp");
}
private static boolean checkForSolaris() {
return checkForPresence("os.name", "sun");
}
private static boolean checkForWindows() {
return checkForPresence("os.name", "win");
}
public static boolean checkForMac() {
return checkForPresence("os.name", "mac");
}
private static boolean checkForPresence(final String key, final String value) {
final String tmp = WildFlySecurityManager.getPropertyPrivileged(key, value);
try {
return tmp != null && tmp.trim().toLowerCase(Locale.ENGLISH).startsWith(value);
} catch (Throwable t) {
return false;
}
}
// No instantiation
private NetworkUtils() {
}
}