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/*
* JBoss, Home of Professional Open Source.
* Copyright 2014 Red Hat, Inc., and individual contributors
* as indicated by the @author tags.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package io.undertow.util;
import io.undertow.UndertowMessages;
import java.io.IOException;
import java.net.Inet4Address;
import java.net.InetAddress;
/**
* @author Stuart Douglas
* @author baranowb
*/
public class NetworkUtils {
public static final String IP4_EXACT = "(?:\\d{1,3}\\.){3}\\d{1,3}";
/**
* IPV6 match. ?: - unnamed groups are used for performance reasons.
* Requirements:
* - match full or partial IPV6 ( sliding '::')
* - match end to start - ^$ to ensure it does not match part of some random (\d:){n,m}
* - IPv4-Embedded IPv6 Address
*
* NO:
* - IPv4 mapped/translated into IPv6
*
* ^(?:([0-9a-fA-F]{1,4}:){7,7}(?:[0-9a-fA-F]){1,4} - full address
* |(?:([0-9a-fA-F]{1,4}:)){1,7}(?:(:)) - last compressed
* |(?:([0-9a-fA-F]{1,4}:)){1,6}(?:(:[0-9a-fA-F]){1,4}) - second to last
* |(?:([0-9a-fA-F]{1,4}:)){1,5}(?:(:[0-9a-fA-F]{1,4})){1,2} - etc
* |(?:([0-9a-fA-F]{1,4}:)){1,4}(?:(:[0-9a-fA-F]{1,4})){1,3}
* |(?:([0-9a-fA-F]{1,4}:)){1,3}(?:(:[0-9a-fA-F]{1,4})){1,4}
* |(?:([0-9a-fA-F]{1,4}:)){1,2}(?:(:[0-9a-fA-F]{1,4})){1,5}
* |(?:([0-9a-fA-F]{1,4}:))(?:(:[0-9a-fA-F]{1,4})){1,6}
* |(?:(:))(?:((:[0-9a-fA-F]{1,4}){1,7}|(?:(:)))))$ - all the way compressed
*/
public static final String IP6_EXACT = "^(?:([0-9a-fA-F]{1,4}:){7,7}(?:[0-9a-fA-F]){1,4}|(?:([0-9a-fA-F]{1,4}:)){1,7}(?:(:))|(?:([0-9a-fA-F]{1,4}:)){1,6}(?:(:[0-9a-fA-F]){1,4})|(?:([0-9a-fA-F]{1,4}:)){1,5}(?:(:[0-9a-fA-F]{1,4})){1,2}|(?:([0-9a-fA-F]{1,4}:)){1,4}(?:(:[0-9a-fA-F]{1,4})){1,3}|(?:([0-9a-fA-F]{1,4}:)){1,3}(?:(:[0-9a-fA-F]{1,4})){1,4}|(?:([0-9a-fA-F]{1,4}:)){1,2}(?:(:[0-9a-fA-F]{1,4})){1,5}|(?:([0-9a-fA-F]{1,4}:))(?:(:[0-9a-fA-F]{1,4})){1,6}|(?:(:))(?:((:[0-9a-fA-F]{1,4}){1,7}|(?:(:)))))$";
public static String formatPossibleIpv6Address(String address) {
if (address == null) {
return null;
}
if (!address.contains(":")) {
return address;
}
if (address.startsWith("[") && address.endsWith("]")) {
return address;
}
return "[" + address + "]";
}
public static InetAddress parseIpv4Address(String addressString) throws IOException {
String[] parts = addressString.split("\\.");
if (parts.length != 4) {
throw UndertowMessages.MESSAGES.invalidIpAddress(addressString);
}
byte[] data = new byte[4];
for (int i = 0; i < 4; ++i) {
String part = parts[i];
if (part.length() == 0 || (part.charAt(0) == '0' && part.length() > 1)) {
//leading zeros are not allowed
throw UndertowMessages.MESSAGES.invalidIpAddress(addressString);
}
data[i] = (byte) Integer.parseInt(part);
}
return InetAddress.getByAddress(data);
}
public static InetAddress parseIpv6Address(final String addressString) throws IOException {
return InetAddress.getByAddress(parseIpv6AddressToBytes(addressString));
}
public static byte[] parseIpv6AddressToBytes(final String addressString) throws IOException {
boolean startsWithColon = addressString.startsWith(":");
if (startsWithColon && !addressString.startsWith("::")) {
throw UndertowMessages.MESSAGES.invalidIpAddress(addressString);
}
String[] parts = (startsWithColon ? addressString.substring(1) : addressString).split(":"); //because of the way split works we want to change a leading double colon to a single one. We have already verified that the address does not actually start with a single colon
byte[] data = new byte[16];
int partOffset = 0;
boolean seenEmpty = false;
if (parts.length > 8) {
throw UndertowMessages.MESSAGES.invalidIpAddress(addressString);
}
for (int i = 0; i < parts.length; ++i) {
String part = parts[i];
if (part.length() > 4) {
throw UndertowMessages.MESSAGES.invalidIpAddress(addressString);
} else if (part.isEmpty()) {
if (seenEmpty) {
throw UndertowMessages.MESSAGES.invalidIpAddress(addressString);
}
seenEmpty = true;
int off = 8 - parts.length;//this works because of the empty part that represents the double colon, so the parts list is one larger than the number of digits
if (off < 0) {
throw UndertowMessages.MESSAGES.invalidIpAddress(addressString);
}
partOffset = off * 2;
} else if (part.length() > 1 && part.charAt(0) == '0') {
//leading zeros are not allowed
throw UndertowMessages.MESSAGES.invalidIpAddress(addressString);
} else {
int num = Integer.parseInt(part, 16);
data[i * 2 + partOffset] = (byte) (num >> 8);
data[i * 2 + partOffset + 1] = (byte) (num);
}
}
if (parts.length < 8 && !seenEmpty) {
//address was too small
throw UndertowMessages.MESSAGES.invalidIpAddress(addressString);
}
return data;
}
public static String toObfuscatedString(InetAddress address) {
if (address == null) {
return null;
}
String s = address.getHostAddress();
if (address instanceof Inet4Address) {
// IPv4 addresses: cut off last byte
return s.substring(0, s.lastIndexOf(".")+1);
}
// IPv6 addresses: cut off at second colon
return s.substring(0, s.indexOf(":", s.indexOf(":")+1)+1);
}
private NetworkUtils() {
}
}
