2 * Copyright (c) 2015 Brocade, Communications Systems, Inc
3 * Copyright (c) 2015 Cisco Systems, Inc. and others. All rights reserved.
5 * This program and the accompanying materials are made available under the
6 * terms of the Eclipse Public License v1.0 which accompanies this distribution,
7 * and is available at http://www.eclipse.org/legal/epl-v10.html
10 package org.opendaylight.openflowplugin.openflow.md.core.sal.convertor;
12 import com.google.common.base.Preconditions;
13 import com.google.common.base.Splitter;
14 import com.google.common.collect.Iterators;
15 import com.google.common.net.InetAddresses;
16 import com.google.common.primitives.UnsignedBytes;
17 import java.net.Inet4Address;
18 import java.net.InetAddress;
19 import java.net.UnknownHostException;
20 import java.util.Arrays;
21 import java.util.Iterator;
22 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev100924.Ipv4Address;
23 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev100924.Ipv4Prefix;
24 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev100924.Ipv6Address;
25 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev100924.Ipv6Prefix;
29 * Created by Martin Bobak <mbobak@cisco.com> on 5.3.2015.
30 * v6 routines added by Anton Ivanov on 14.6.2015
32 public final class IpConversionUtil {
34 public static final String PREFIX_SEPARATOR = "/";
35 public static final Splitter PREFIX_SPLITTER = Splitter.on('/');
36 private static final int INADDR4SZ = 4;
37 private static final int INADDR6SZ = 16;
38 private static final int INT16SZ = 2;
40 private IpConversionUtil() {
41 throw new UnsupportedOperationException("This class should not be instantiated.");
44 public static Iterator<String> splitToParts(final Ipv4Prefix ipv4Prefix) {
45 return PREFIX_SPLITTER.split(ipv4Prefix.getValue()).iterator();
48 public static Iterator<String> splitToParts(final Ipv4Address ipv4Address) {
49 /* Invalid (Ab)use of ip address as prefix!!! */
50 String [] tempPrefix = {ipv4Address.getValue(), "32"};
51 return Iterators.forArray(tempPrefix);
54 public static Iterator<String> splitToParts(final Ipv6Prefix ipv6Prefix) {
55 return PREFIX_SPLITTER.split(ipv6Prefix.getValue()).iterator();
58 public static Iterator<String> splitToParts(final Ipv6Address ipv6Address) {
59 /* Invalid (Ab)use of ip address as prefix!!! */
60 String [] tempPrefix = {ipv6Address.getValue(), "128"};
61 return Iterators.forArray(tempPrefix);
65 /* This forest of functions has a purpose:
67 * 1. There are multiple coding styles around the plugin, this is necessary in order to have
68 * one mechanism to convert them all, one mechanism to find them...
69 * 2. I hope that one day yangtools will actually deliver code fit for purpose in a packet
70 * processing application (presently it is not. When this happens, these can be optimized
71 * for "side-load" of pre-vetted data. Example. IP Address (v4 or v6) is prevetted left of the
72 * prefix. It should be loadable into Prefix without _RERUNNING_ 100ms+ of regexps. When (and if)
73 * that happens, it will be a simple fix here without chasing it across the whole plugin.
76 public static Ipv4Prefix createPrefix(final Ipv4Address ipv4Address){
77 return new Ipv4Prefix(ipv4Address.getValue() + PREFIX_SEPARATOR + 32);
80 public static Ipv4Prefix createPrefix(final Ipv4Address ipv4Address, final String mask){
82 * Ipv4Address has already validated the address part of the prefix,
83 * It is mandated to comply to the same regexp as the address
84 * There is absolutely no point rerunning additional checks vs this
85 * Note - there is no canonical form check here!!!
87 if (null != mask && !mask.isEmpty()) {
88 return new Ipv4Prefix(ipv4Address.getValue() + PREFIX_SEPARATOR + mask);
90 return new Ipv4Prefix(ipv4Address.getValue() + PREFIX_SEPARATOR + "32");
94 public static Ipv4Prefix createPrefix(final Ipv4Address ipv4Address, final int intmask){
95 return createPrefix(ipv4Address, String.valueOf(intmask));
98 public static Ipv4Prefix createPrefix(final Ipv4Address ipv4Address, final byte [] bytemask){
99 return createPrefix(ipv4Address, String.valueOf(countBits(bytemask)));
102 public static Ipv6Prefix createPrefix(final Ipv6Address ipv6Address){
103 return new Ipv6Prefix(ipv6Address.getValue() + PREFIX_SEPARATOR + 128);
106 public static Ipv6Prefix createPrefix(final Ipv6Address ipv6Address, final String mask){
108 * Ipv6Address has already validated the address part of the prefix,
109 * It is mandated to comply to the same regexp as the address
110 * There is absolutely no point rerunning additional checks vs this
111 * Note - there is no canonical form check here!!!
113 if (null != mask && !mask.isEmpty()) {
114 return new Ipv6Prefix(ipv6Address.getValue() + PREFIX_SEPARATOR + mask);
116 return new Ipv6Prefix(ipv6Address.getValue() + PREFIX_SEPARATOR + "128");
120 public static Ipv6Prefix createPrefix(final Ipv6Address ipv6Address, final int intmask){
121 return createPrefix(ipv6Address, String.valueOf(intmask));
124 public static Ipv6Prefix createPrefix(final Ipv6Address ipv6Address, final byte [] bytemask){
126 * Ipv4Address has already validated the address part of the prefix,
127 * It is mandated to comply to the same regexp as the address
128 * There is absolutely no point rerunning additional checks vs this
129 * Note - there is no canonical form check here!!!
131 return createPrefix(ipv6Address, String.valueOf(countBits(bytemask)));
134 public static Integer extractPrefix(final Ipv4Prefix ipv4Prefix) {
135 Iterator<String> addressParts = splitToParts(ipv4Prefix);
137 Integer retval = null;
138 if (addressParts.hasNext()) {
139 retval = Integer.parseInt(addressParts.next());
144 public static Integer extractPrefix(final Ipv6Prefix ipv6Prefix) {
145 Iterator<String> addressParts = splitToParts(ipv6Prefix);
147 Integer retval = null;
148 if (addressParts.hasNext()) {
149 retval = Integer.parseInt(addressParts.next());
154 public static Integer extractPrefix(final Ipv4Address ipv4Prefix) {
158 public static Integer extractPrefix(final Ipv6Address ipv6Prefix) {
164 * Read all of the following before you touch any v6 code or decide to
165 * optimize it by invoking a "simple" Guava call
167 * Java IPv6 is fundamentally broken and Google libraries do not fix it.
168 * 1. Java will allways implicitly rewrite v4 mapped into v6 as a v4 address
169 * and there is absolutely no way to override this behaviour
170 * 2. Guava libraries cannot parse non-canonical IPv6. They will throw an
171 * exception. Even if they did, they re-use the same broken java code
174 * This is why we have to parse v6 by ourselves.
176 * The following conversion code is based on inet_cidr_pton_ipv6 in NetBSD
178 * The original BSD code is licensed under standard BSD license. While we
179 * are not obliged to provide an attribution, credit where credit is due.
180 * As far as why it is similar to Sun's sun.net.util please ask Sun why
181 * their code has the same variable names, comments and code flow.
187 * Convert Ipv6Address object to a valid Canonical v6 address in byte format
189 * @param ipv6Address - v6 Address object
190 * @return - byte array of size 16. Last byte contains netmask
194 public static byte[] canonicalBinaryV6Address(final Ipv6Address ipv6Address) {
196 * Do not modify this routine to take direct strings input!!!
197 * Key checks have been removed based on the assumption that
198 * the input is validated via regexps in Ipv6Prefix()
201 String [] address = (ipv6Address.getValue()).split("%");
207 /* Isn't it fun - the above variable names are the same in BSD and Sun sources */
211 char[] src = address[0].toCharArray();
213 byte[] dst = new byte[INADDR6SZ];
215 int src_length = src.length;
220 /* Leading :: requires some special handling. */
222 /* Isn't it fun - the above comment is again the same in BSD and Sun sources,
223 * We will derive our code from BSD. Shakespear always sounds better
224 * in original Clingon. So does Dilbert.
228 Preconditions.checkArgument(src[++i] == ':', "Invalid v6 address");
236 while (i < src_length) {
238 int chval = Character.digit(ch, 16);
240 /* Business as usual - ipv6 address digit.
241 * We can remove all checks from the original BSD code because
242 * the regexp has already verified that we are not being fed
243 * anything bigger than 0xffff between the separators.
258 /* no need to check separator position validity - regexp does that */
263 /* removed overrun check - the regexp checks for valid data */
265 dst[j++] = (byte) ((val >>> 8) & 0xff);
266 dst[j++] = (byte) (val & 0xff);
272 /* frankenstein - v4 attached to v6, mixed notation */
274 if (ch == '.' && ((j + INADDR4SZ) <= INADDR6SZ)) {
276 /* this has passed the regexp so it is fairly safe to parse it
277 * straight away. As v4 addresses do not suffer from the same
278 * defficiencies as the java v6 implementation we can invoke it
279 * straight away and be done with it
282 Preconditions.checkArgument(j != (INADDR6SZ - INADDR4SZ - 1), "Invalid v4 in v6 mapping");
284 InetAddress _inet_form = InetAddresses.forString(address[0].substring(curtok, src_length));
286 Preconditions.checkArgument(_inet_form instanceof Inet4Address);
287 System.arraycopy(_inet_form.getAddress(), 0, dst, j, INADDR4SZ);
293 /* removed parser exit on invalid char - no need to do it, regexp checks it */
296 Preconditions.checkArgument(j + INT16SZ <= INADDR6SZ, "Overrun in v6 parsing, should not occur");
297 dst[j++] = (byte) ((val >> 8) & 0xff);
298 dst[j++] = (byte) (val & 0xff);
304 Preconditions.checkArgument(j != INADDR6SZ, "Overrun in v6 parsing, should not occur");
305 for (i = 1; i <= n; i++) {
306 dst[INADDR6SZ - i] = dst[colonp + n - i];
307 dst[colonp + n - i] = 0;
312 Preconditions.checkArgument(j == INADDR6SZ, "Overrun in v6 parsing, should not occur");
317 public static String byteArrayV6AddressToString (final byte [] _binary_form) throws UnknownHostException{
318 /* DO NOT DIY!!! - InetAddresses will actually print correct canonical
319 * zero compressed form.
321 return InetAddresses.toAddrString(InetAddress.getByAddress(_binary_form));
324 private static int nextNibble(final int mask) {
331 return 0xff << (8 - mask);
335 * Convert Ipv6Prefix object to a valid Canonical v6 prefix in byte format
337 * @param ipv6Prefix - v6 prefix object
338 * @return - byte array of size 16 + 1. Last byte contains netmask
340 public static byte[] canonicalBinaryV6Prefix(final Ipv6Prefix ipv6Prefix) {
342 * Do not modify this routine to take direct strings input!!!
343 * Key checks have been removed based on the assumption that
344 * the input is validated via regexps in Ipv6Prefix()
349 String [] address = null;
351 boolean valid = true;
353 address = (ipv6Prefix.getValue()).split("/");
355 mask = Integer.parseInt(address[1]);
359 } catch (NumberFormatException | ArrayIndexOutOfBoundsException e) {
363 Preconditions.checkArgument(valid, "Supplied netmask in %s is invalid", ipv6Prefix.getValue());
370 /* Isn't it fun - the above variable names are the same in BSD and Sun sources */
374 char[] src = address[0].toCharArray();
376 byte[] dst = new byte[INADDR6SZ + 1];
380 int src_length = src.length;
385 /* Leading :: requires some special handling. */
387 /* Isn't it fun - the above comment is again the same in BSD and Sun sources,
388 * We will derive our code from BSD. Shakespear always sounds better
389 * in original Clingon. So does Dilbert.
393 Preconditions.checkArgument(src[++i] == ':', "Invalid v6 address");
401 while (i < src_length) {
403 int chval = Character.digit(ch, 16);
405 /* Business as usual - ipv6 address digit.
406 * We can remove all checks from the original BSD code because
407 * the regexp has already verified that we are not being fed
408 * anything bigger than 0xffff between the separators.
423 /* no need to check separator position validity - regexp does that */
428 /* removed overrun check - the regexp checks for valid data */
433 /* stop parsing if we are past the mask */
437 dst[j] = (byte) ((val >> 8) & nextNibble(m)); j++; m = m - 8;
440 /* stop parsing if we are past the mask */
444 dst[j] = (byte) (val & nextNibble(m)); j++; m = m - 8;
450 /* frankenstein - v4 attached to v6, mixed notation */
452 if (ch == '.' && ((j + INADDR4SZ) <= INADDR6SZ)) {
454 /* this has passed the regexp so it is fairly safe to parse it
455 * straight away. As v4 addresses do not suffer from the same
456 * defficiencies as the java v6 implementation we can invoke it
457 * straight away and be done with it
460 Preconditions.checkArgument(j != (INADDR6SZ - INADDR4SZ - 1), "Invalid v4 in v6 mapping");
462 InetAddress _inet_form = InetAddresses.forString(address[0].substring(curtok, src_length));
464 Preconditions.checkArgument(_inet_form instanceof Inet4Address);
465 System.arraycopy(_inet_form.getAddress(), 0, dst, j, INADDR4SZ);
471 /* removed parser exit on ivalid char - no need to do it, regexp checks it */
474 Preconditions.checkArgument(j + INT16SZ <= INADDR6SZ, "Overrun in v6 parsing, should not occur");
475 dst[j] = (byte) ((val >> 8) & nextNibble(m)) ; j++; m = m - 8;
476 dst[j] = (byte) (val & nextNibble(m)); j++; m = m - 8;
479 if ((j < INADDR6SZ) && (m < 0)) {
481 for (i = j; i < INADDR6SZ; i++) {
489 Preconditions.checkArgument(j != INADDR6SZ, "Overrun in v6 parsing, should not occur");
490 for (i = 1; i <= n; i++) {
491 dst[INADDR6SZ - i] = dst[colonp + n - i];
492 dst[colonp + n - i] = 0;
496 Preconditions.checkArgument(j == INADDR6SZ, "Overrun in v6 parsing, should not occur");
499 dst[INADDR6SZ] = (byte) mask;
504 * Print a v6 prefix in byte array + 1 notation
506 * @param _binary_form - prefix, in byte [] form, last byte is netmask
508 public static String byteArrayV6PrefixToString(final byte [] _binary_form) throws UnknownHostException {
509 /* NO DIY!!! - InetAddresses will actually print correct canonical
510 * zero compressed form
512 StringBuilder sb = new StringBuilder();
513 /* Yang RFC specifies that the normalized form is RFC 5952, note - java
514 * core type is not RFC compliant, guava is.
517 InetAddresses.toAddrString(
518 InetAddress.getByAddress(
519 Arrays.copyOfRange(_binary_form, 0, INADDR6SZ)
524 sb.append(_binary_form[INADDR6SZ] & 0xff);
525 return sb.toString();
530 * Canonicalize a v6 prefix while in binary form
532 * @param _prefix - prefix, in byte [] form
533 * @param mask - mask - number of bits
535 public static void canonicalizeIpv6Prefix(final byte [] _prefix, int mask) {
537 for (int i=0; i < INADDR6SZ; i++) {
538 _prefix[i] = (byte) (_prefix[i] & nextNibble(mask));
543 public static byte[] convertIpv6PrefixToByteArray(int prefix) {
544 byte[] mask = new byte[16];
545 for (int count = 0; count < 16; count++) {
546 mask[count] = (byte) nextNibble(prefix);
552 public static Ipv6Address extractIpv6Address(final Ipv6Prefix ipv6Prefix) {
553 Iterator<String> addressParts = PREFIX_SPLITTER.split(ipv6Prefix.getValue()).iterator();
554 return new Ipv6Address(addressParts.next());
557 public static Integer extractIpv6Prefix(final Ipv6Prefix ipv6Prefix) {
558 Iterator<String> addressParts = PREFIX_SPLITTER.split(ipv6Prefix.getValue()).iterator();
561 Integer prefix = null;
562 if (addressParts.hasNext()) {
563 prefix = Integer.parseInt(addressParts.next());
568 public static int countBits(final byte[] mask) {
570 for (byte b : mask) {
571 netmask += Integer.bitCount(UnsignedBytes.toInt(b));