2 * Copyright (c) 2016 Pantheon Technologies s.r.o. and others. All rights reserved.
4 * This program and the accompanying materials are made available under the
5 * terms of the Eclipse Public License v1.0 which accompanies this distribution,
6 * and is available at http://www.eclipse.org/legal/epl-v10.html
8 package org.opendaylight.mdsal.model.ietf.util;
10 import static com.google.common.base.Preconditions.checkArgument;
11 import static java.util.Objects.requireNonNull;
13 import com.google.common.annotations.Beta;
14 import com.google.common.net.InetAddresses;
15 import java.net.Inet4Address;
16 import java.net.Inet6Address;
17 import java.net.InetAddress;
18 import java.net.UnknownHostException;
19 import java.util.AbstractMap.SimpleImmutableEntry;
20 import java.util.Map.Entry;
21 import org.eclipse.jdt.annotation.NonNull;
22 import org.eclipse.jdt.annotation.Nullable;
23 import org.opendaylight.mdsal.binding.spec.reflect.StringValueObjectFactory;
26 * A set of utility methods to efficiently instantiate various ietf-inet-types DTOs.
29 @SuppressWarnings("checkstyle:classTypeParameterName")
30 public abstract class AbstractIetfInetUtil<A4, A4NZ extends A4, P4, A6, A6NZ extends A6, P6, A, ANZ, P> {
31 private static final int INET4_LENGTH = 4;
32 private static final int INET6_LENGTH = 16;
34 private final StringValueObjectFactory<A4> address4Factory;
35 private final StringValueObjectFactory<A4NZ> address4NoZoneFactory;
36 private final StringValueObjectFactory<P4> prefix4Factory;
37 private final StringValueObjectFactory<A6> address6Factory;
38 private final StringValueObjectFactory<A6NZ> address6NoZoneFactory;
39 private final StringValueObjectFactory<P6> prefix6Factory;
40 private final Class<A4NZ> addr4nzClass;
41 private final Class<A6NZ> addr6nzClass;
43 protected AbstractIetfInetUtil(final Class<A4> addr4Class, final Class<A4NZ> addr4nzClass,
44 final Class<P4> prefix4Class, final Class<A6> addr6Class, final Class<A6NZ> addr6nzClass,
45 final Class<P6> prefix6Class) {
46 this.addr4nzClass = requireNonNull(addr4nzClass);
47 this.addr6nzClass = requireNonNull(addr6nzClass);
48 this.address4Factory = StringValueObjectFactory.create(addr4Class, "0.0.0.0");
49 this.address4NoZoneFactory = StringValueObjectFactory.create(addr4nzClass, "0.0.0.0");
50 this.prefix4Factory = StringValueObjectFactory.create(prefix4Class, "0.0.0.0/0");
51 this.address6Factory = StringValueObjectFactory.create(addr6Class, "::0");
52 this.address6NoZoneFactory = StringValueObjectFactory.create(addr6nzClass, "::0");
53 this.prefix6Factory = StringValueObjectFactory.create(prefix6Class, "::0/0");
56 protected abstract @NonNull A ipv4Address(@NonNull A4 addr);
58 protected abstract @NonNull ANZ ipv4AddressNoZone(@NonNull A4NZ addr);
60 protected abstract @NonNull A ipv6Address(@NonNull A6 addr);
62 protected abstract @NonNull ANZ ipv6AddressNoZone(@NonNull A6NZ addr);
64 protected abstract @Nullable A4 maybeIpv4Address(@NonNull A addr);
66 protected abstract @Nullable A4NZ maybeIpv4AddressNoZone(@NonNull ANZ addr);
68 protected abstract @Nullable A6 maybeIpv6Address(@NonNull A addr);
70 protected abstract @Nullable A6NZ maybeIpv6AddressNoZone(@NonNull ANZ addr);
72 protected abstract @NonNull P ipv4Prefix(@NonNull P4 addr);
74 protected abstract @NonNull P ipv6Prefix(@NonNull P6 addr);
76 protected abstract @NonNull String ipv4AddressString(@NonNull A4 addr);
78 protected abstract @NonNull String ipv6AddressString(@NonNull A6 addr);
80 protected abstract @NonNull String ipv4PrefixString(@NonNull P4 prefix);
82 protected abstract @NonNull String ipv6PrefixString(@NonNull P6 prefix);
85 * Create an IpAddress by interpreting input bytes as an IPv4 or IPv6 address, based on array length.
87 * @param bytes 4-byte (IPv4) or 6-byte (IPv6) array
88 * @return An IpAddress object
89 * @throws IllegalArgumentException if bytes has length different from 4 or 6
90 * @throws NullPointerException if bytes is null
92 public final @NonNull A ipAddressFor(final byte @NonNull[] bytes) {
93 switch (bytes.length) {
95 return ipv4Address(ipv4AddressFor(bytes));
97 return ipv6Address(ipv6AddressFor(bytes));
99 throw new IllegalArgumentException("Invalid array length " + bytes.length);
103 public final @NonNull A ipAddressFor(final @NonNull InetAddress addr) {
104 requireNonNull(addr, "Address must not be null");
105 if (addr instanceof Inet4Address) {
106 return ipv4Address(ipv4AddressFor(addr));
107 } else if (addr instanceof Inet6Address) {
108 return ipv6Address(ipv6AddressFor(addr));
110 throw new IllegalArgumentException("Unhandled address " + addr);
115 * Create an IpAddress by interpreting input bytes as an IPv4 or IPv6 address, based on array length.
117 * @param bytes 4-byte (IPv4) or 6-byte (IPv6) array
118 * @return A no-zone IpAddress object
119 * @throws IllegalArgumentException if bytes has length different from 4 or 6
120 * @throws NullPointerException if bytes is null
122 public final @NonNull ANZ ipAddressNoZoneFor(final byte @NonNull[] bytes) {
123 switch (bytes.length) {
125 return ipv4AddressNoZone(ipv4AddressNoZoneFor(bytes));
127 return ipv6AddressNoZone(ipv6AddressNoZoneFor(bytes));
129 throw new IllegalArgumentException("Invalid array length " + bytes.length);
133 public final @NonNull ANZ ipAddressNoZoneFor(final @NonNull InetAddress addr) {
134 requireNonNull(addr, "Address must not be null");
135 if (addr instanceof Inet4Address) {
136 return ipv4AddressNoZone(ipv4AddressNoZoneFor(addr));
137 } else if (addr instanceof Inet6Address) {
138 return ipv6AddressNoZone(ipv6AddressNoZoneFor(addr));
140 throw new IllegalArgumentException("Unhandled address " + addr);
145 * Create an IpPrefix by combining the address with a mask. The address
146 * bytes are interpreted as an address and the specified mask is concatenated to
147 * it. The address bytes are not masked.
149 * @param bytes Input address as a 4-byte (IPv4) or 16-byte (IPv6) array
150 * @param mask Prefix mask
151 * @return An IpPrefix object
152 * @throws IllegalArgumentException if bytes has length different from 4 or 16 or if mask is not
153 * in range 0-32 or 0-128 respectively
154 * @throws NullPointerException if bytes is null
156 public final @NonNull P ipPrefixFor(final byte @NonNull[] bytes, final int mask) {
157 switch (bytes.length) {
159 return ipv4Prefix(ipv4PrefixFor(bytes, mask));
161 return ipv6Prefix(ipv6PrefixFor(bytes, mask));
163 throw new IllegalArgumentException("Invalid array length " + bytes.length);
167 public final @NonNull P ipPrefixFor(final @NonNull InetAddress addr, final int mask) {
168 requireNonNull(addr, "Address must not be null");
169 if (addr instanceof Inet4Address) {
170 return ipv4Prefix(ipv4PrefixFor(addr, mask));
171 } else if (addr instanceof Inet6Address) {
172 return ipv6Prefix(ipv6PrefixFor(addr, mask));
174 throw new IllegalArgumentException("Unhandled address " + addr);
178 public final @NonNull InetAddress inetAddressFor(final @NonNull A addr) {
179 final A4 v4 = maybeIpv4Address(addr);
181 return inet4AddressFor(v4);
183 final A6 v6 = maybeIpv6Address(addr);
184 checkArgument(v6 != null, "Address %s is neither IPv4 nor IPv6", addr);
185 return inet6AddressFor(v6);
188 public final @NonNull InetAddress inetAddressForNoZone(final @NonNull ANZ addr) {
189 final A4NZ v4 = maybeIpv4AddressNoZone(addr);
191 return inet4AddressForNoZone(v4);
193 final A6NZ v6 = maybeIpv6AddressNoZone(addr);
194 checkArgument(v6 != null, "Address %s is neither IPv4 nor IPv6", addr);
195 return inet6AddressForNoZone(v6);
199 public final @NonNull Inet4Address inet4AddressFor(final @NonNull A4 addr) {
201 return (Inet4Address) InetAddress.getByAddress(ipv4AddressBytes(addr));
202 } catch (UnknownHostException e) {
203 throw new IllegalArgumentException("Invalid address " + addr, e);
207 public final @NonNull Inet4Address inet4AddressForNoZone(final @NonNull A4NZ addr) {
209 return (Inet4Address) InetAddress.getByAddress(ipv4AddressNoZoneBytes(addr));
210 } catch (UnknownHostException e) {
211 throw new IllegalArgumentException("Invalid address " + addr, e);
215 public final @NonNull Inet6Address inet6AddressFor(final @NonNull A6 addr) {
217 return (Inet6Address) InetAddress.getByAddress(ipv6AddressBytes(addr));
218 } catch (UnknownHostException e) {
219 throw new IllegalArgumentException("Invalid address " + addr, e);
223 public final @NonNull Inet6Address inet6AddressForNoZone(final @NonNull A6NZ addr) {
225 return (Inet6Address) InetAddress.getByAddress(ipv6AddressNoZoneBytes(addr));
226 } catch (UnknownHostException e) {
227 throw new IllegalArgumentException("Invalid address " + addr, e);
232 * Create an Ipv4Address by interpreting input bytes as an IPv4 address.
234 * @param bytes 4-byte array
235 * @return An Ipv4Address object
236 * @throws IllegalArgumentException if bytes has length different from 4
237 * @throws NullPointerException if bytes is null
239 public final @NonNull A4 ipv4AddressFor(final byte @NonNull[] bytes) {
240 return address4Factory.newInstance(addressStringV4(bytes));
244 * Create an Ipv4Address by interpreting an {@link Inet4Address}.
246 * @param addr An {@link Inet4Address}
247 * @return An Ipv4Address object
248 * @throws IllegalArgumentException if addr is not an {@link Inet4Address}
249 * @throws NullPointerException if addr is null
251 public final @NonNull A4 ipv4AddressFor(final @NonNull InetAddress addr) {
252 requireNonNull(addr, "Address must not be null");
253 checkArgument(addr instanceof Inet4Address, "Address has to be an Inet4Address");
254 return address4Factory.newInstance(addr.getHostAddress());
258 * Create an Ipv4Address by interpreting input 32 bits as an IPv4 address in big-endian format.
260 * @param bits 32 bits, big endian
261 * @return An Ipv4Address object
263 public final @NonNull A4 ipv4AddressFor(final int bits) {
264 return address4Factory.newInstance(Ipv4Utils.addressString(bits));
268 * Create an Ipv4AddressNoZone by interpreting input bytes as an IPv4 address.
270 * @param bytes 4-byte array
271 * @return An Ipv4AddressNoZone object
272 * @throws IllegalArgumentException if bytes has length different from 4
273 * @throws NullPointerException if bytes is null
275 public final @NonNull A4NZ ipv4AddressNoZoneFor(final byte @NonNull[] bytes) {
276 return address4NoZoneFactory.newInstance(addressStringV4(bytes));
280 * Create an Ipv4AddressNoZone by interpreting an {@link Inet4Address}.
282 * @param addr An {@link Inet4Address}
283 * @return An Ipv4AddressNoZone object
284 * @throws IllegalArgumentException if addr is not an {@link Inet4Address}
285 * @throws NullPointerException if addr is null
287 public final @NonNull A4NZ ipv4AddressNoZoneFor(final @NonNull InetAddress addr) {
288 requireNonNull(addr, "Address must not be null");
289 checkArgument(addr instanceof Inet4Address, "Address has to be an Inet4Address");
290 return address4NoZoneFactory.newInstance(addr.getHostAddress());
294 * Create an Ipv4AddressNoZone by interpreting input 32 bits as an IPv4 address in big-endian format.
296 * @param bits 32 bits, big endian
297 * @return An Ipv4AddressNoZone object
299 public final @NonNull A4NZ ipv4AddressNoZoneFor(final int bits) {
300 return address4NoZoneFactory.newInstance(Ipv4Utils.addressString(bits));
304 * Create an Ipv4AddressNoZone by interpreting an Ipv4Address.
306 * @param addr An Ipv4Address
307 * @return An Ipv4AddressNoZone object
308 * @throws NullPointerException if addr is null
310 public final @NonNull A4NZ ipv4AddressNoZoneFor(final @NonNull A4 addr) {
311 requireNonNull(addr, "Address must not be null");
312 return addr4nzClass.isInstance(addr) ? addr4nzClass.cast(addr)
313 : address4NoZoneFactory.newInstance(stripZone(ipv4AddressString(addr)));
316 public final @NonNull A4 ipv4AddressFrom(final @NonNull P4 prefix) {
317 return prefixToAddress(address4Factory, ipv4PrefixString(prefix));
320 public final @NonNull A4NZ ipv4AddressNoZoneFrom(final @NonNull P4 prefix) {
321 return prefixToAddress(address4NoZoneFactory, ipv4PrefixString(prefix));
324 public final byte @NonNull[] ipv4AddressBytes(final @NonNull A4 addr) {
326 * This implementation relies heavily on the input string having been validated to comply with
327 * the Ipv4Address pattern, which may include a zone index.
329 final String str = ipv4AddressString(addr);
330 final int percent = str.indexOf('%');
331 return Ipv4Utils.addressBytes(str, percent == -1 ? str.length() : percent);
334 public final int ipv4AddressBits(final @NonNull A4 addr) {
335 final String str = ipv4AddressString(addr);
336 final int percent = str.indexOf('%');
337 return Ipv4Utils.addressBits(str, percent == -1 ? str.length() : percent);
340 public final byte @NonNull[] ipv4AddressNoZoneBytes(final @NonNull A4NZ addr) {
342 * This implementation relies heavily on the input string having been validated to comply with
343 * the Ipv4AddressNoZone pattern, which must not include a zone index.
345 final String str = ipv4AddressString(addr);
346 return Ipv4Utils.addressBytes(str, str.length());
349 public final int ipv4AddressNoZoneBits(final @NonNull A4NZ addr) {
350 final String str = ipv4AddressString(addr);
351 return Ipv4Utils.addressBits(str, str.length());
355 * Create a /32 Ipv4Prefix by interpreting input bytes as an IPv4 address.
357 * @param bytes four-byte array
358 * @return An Ipv4Prefix object
359 * @throws IllegalArgumentException if bytes has length different from 4
360 * @throws NullPointerException if bytes is null
362 public final @NonNull P4 ipv4PrefixFor(final byte @NonNull[] bytes) {
363 return prefix4Factory.newInstance(prefixStringV4(bytes));
367 * Create a Ipv4Prefix by combining the address with a mask. The address
368 * bytes are interpreted as an address and the specified mask is concatenated to
369 * it. The address bytes are not masked, hence input <code>address = { 1, 2, 3, 4 }</code>
370 * and <code>mask=24</code> will result in <code>1.2.3.4/24</code>.
372 * @param address Input address as a 4-byte array
373 * @param mask Prefix mask
374 * @return An Ipv4Prefix object
375 * @throws IllegalArgumentException if bytes has length different from 4 or if mask is not in range 0-32
376 * @throws NullPointerException if bytes is null
378 public final @NonNull P4 ipv4PrefixFor(final byte @NonNull[] address, final int mask) {
379 return prefix4Factory.newInstance(prefixStringV4(address, mask));
383 * Create a /32 Ipv4Prefix for an {@link Inet4Address}.
385 * @param addr An {@link Inet4Address}
386 * @return An Ipv4Prefix object
387 * @throws IllegalArgumentException if addr is not an Inet4Address
388 * @throws NullPointerException if addr is null
390 public final @NonNull P4 ipv4PrefixFor(final @NonNull InetAddress addr) {
391 requireNonNull(addr, "Address must not be null");
392 checkArgument(addr instanceof Inet4Address, "Address has to be an Inet4Address");
393 return prefix4Factory.newInstance(addr.getHostAddress() + "/32");
397 * Create a Ipv4Prefix by combining the address with a mask. The address bytes are not masked.
399 * @param addr An {@link Inet4Address}
400 * @param mask Prefix mask
401 * @return An Ipv4Prefix object
402 * @throws IllegalArgumentException if addr is not an Inet4Address or if mask is not in range 0-32
403 * @throws NullPointerException if addr is null
405 public final @NonNull P4 ipv4PrefixFor(final @NonNull InetAddress addr, final int mask) {
406 requireNonNull(addr, "Address must not be null");
407 checkArgument(addr instanceof Inet4Address, "Address has to be an Inet4Address");
408 return newIpv4Prefix(addr.getHostAddress(), mask);
411 public final @NonNull P4 ipv4PrefixFor(final @NonNull A4 addr) {
412 requireNonNull(addr, "Address must not be null");
413 return prefix4Factory.newInstance(stripZone(ipv4AddressString(addr)) + "/32");
416 public final @NonNull P4 ipv4PrefixFor(final @NonNull A4 addr, final int mask) {
417 requireNonNull(addr, "Address must not be null");
418 return newIpv4Prefix(stripZone(ipv4AddressString(addr)), mask);
421 public final @NonNull P4 ipv4PrefixForNoZone(final @NonNull A4NZ addr) {
422 requireNonNull(addr, "Address must not be null");
423 return prefix4Factory.newInstance(ipv4AddressString(addr) + "/32");
426 public final @NonNull P4 ipv4PrefixForNoZone(final @NonNull A4NZ addr, final int mask) {
427 requireNonNull(addr, "Address must not be null");
428 return newIpv4Prefix(ipv4AddressString(addr), mask);
431 public final @NonNull P4 ipv4PrefixForShort(final byte @NonNull[] address, final int mask) {
433 // Easy case, reuse the template
434 return prefix4Factory.getTemplate();
437 return v4PrefixForShort(address, 0, mask / Byte.SIZE + (mask % Byte.SIZE == 0 ? 0 : 1), mask);
440 public final @NonNull P4 ipv4PrefixForShort(final byte @NonNull[] array, final int startOffset, final int mask) {
442 // Easy case, reuse the template
443 return prefix4Factory.getTemplate();
446 return v4PrefixForShort(array, startOffset, mask / Byte.SIZE + (mask % Byte.SIZE == 0 ? 0 : 1), mask);
449 private static String stripZone(final String str) {
450 final int percent = str.indexOf('%');
451 return percent == -1 ? str : str.substring(0, percent);
454 private @NonNull P4 newIpv4Prefix(final String addr, final int mask) {
455 checkArgument(mask >= 0 && mask <= 32, "Invalid mask %s", mask);
456 return prefix4Factory.newInstance(addr + '/' + mask);
459 public final @NonNull Entry<A4, Integer> splitIpv4Prefix(final @NonNull P4 prefix) {
460 return splitPrefix(address4Factory, ipv4PrefixString(prefix));
463 public final @NonNull Entry<A4NZ, Integer> splitIpv4PrefixNoZone(final @NonNull P4 prefix) {
464 return splitPrefix(address4NoZoneFactory, ipv4PrefixString(prefix));
467 public final byte @NonNull[] ipv4PrefixToBytes(final @NonNull P4 prefix) {
468 final String str = ipv4PrefixString(prefix);
469 final int slash = str.lastIndexOf('/');
471 final byte[] bytes = new byte[INET4_LENGTH + 1];
472 Ipv4Utils.fillIpv4Bytes(bytes, 0, str, 0, slash);
473 bytes[INET4_LENGTH] = (byte)Integer.parseInt(str.substring(slash + 1), 10);
478 * Create an Ipv6Address by interpreting input bytes as an IPv6 address.
480 * @param bytes 16-byte array
481 * @return An Ipv6Address object
482 * @throws IllegalArgumentException if bytes has length different from 16
483 * @throws NullPointerException if bytes is null
485 public final @NonNull A6 ipv6AddressFor(final byte @NonNull[] bytes) {
486 return address6Factory.newInstance(addressStringV6(bytes));
490 * Create an Ipv6Address by interpreting an {@link Inet6Address}.
492 * @param addr An {@link Inet6Address}
493 * @return An Ipv6Address object
494 * @throws IllegalArgumentException if addr is not an {@link Inet6Address}
495 * @throws NullPointerException if addr is null
497 public final @NonNull A6 ipv6AddressFor(final @NonNull InetAddress addr) {
498 return address6Factory.newInstance(addressStringV6(addr));
502 * Create an Ipv6AddressNoZone by interpreting input bytes as an IPv6 address.
504 * @param bytes 16-byte array
505 * @return An Ipv6Address object
506 * @throws IllegalArgumentException if bytes has length different from 16
507 * @throws NullPointerException if bytes is null
509 public final @NonNull A6NZ ipv6AddressNoZoneFor(final byte @NonNull[] bytes) {
510 return address6NoZoneFactory.newInstance(addressStringV6(bytes));
514 * Create an Ipv6AddressNoZone by interpreting an {@link Inet6Address}.
516 * @param addr An {@link Inet6Address}
517 * @return An Ipv6AddressNoZone object
518 * @throws IllegalArgumentException if addr is not an {@link Inet6Address}
519 * @throws NullPointerException if addr is null
521 public final @NonNull A6NZ ipv6AddressNoZoneFor(final @NonNull InetAddress addr) {
522 return address6NoZoneFactory.newInstance(addressStringV6(addr));
526 * Create an Ipv6AddressNoZone by interpreting an Ipv6Address.
528 * @param addr An Ipv6Address
529 * @return An Ipv6AddressNoZone object
530 * @throws NullPointerException if addr is null
532 public final @NonNull A6NZ ipv6AddressNoZoneFor(final @NonNull A6 addr) {
533 requireNonNull(addr, "Address must not be null");
534 return addr6nzClass.isInstance(addr) ? addr6nzClass.cast(addr)
535 : address6NoZoneFactory.newInstance(stripZone(ipv6AddressString(addr)));
538 public final @NonNull A6 ipv6AddressFrom(final @NonNull P6 prefix) {
539 return prefixToAddress(address6Factory, ipv6PrefixString(prefix));
542 public final @NonNull A6NZ ipv6AddressNoZoneFrom(final @NonNull P6 prefix) {
543 return prefixToAddress(address6NoZoneFactory, ipv6PrefixString(prefix));
546 public final byte @NonNull[] ipv6AddressBytes(final @NonNull A6 addr) {
547 final String str = ipv6AddressString(addr);
548 final int percent = str.indexOf('%');
549 return ipv6StringBytes(str, percent == -1 ? str.length() : percent);
552 public final byte @NonNull[] ipv6AddressNoZoneBytes(final @NonNull A6NZ addr) {
553 final String str = ipv6AddressString(addr);
554 return ipv6StringBytes(str, str.length());
557 private static byte @NonNull[] ipv6StringBytes(final @NonNull String str, final int limit) {
558 final byte[] bytes = new byte[INET6_LENGTH];
559 Ipv6Utils.fillIpv6Bytes(bytes, str, limit);
564 * Create a /128 Ipv6Prefix by interpreting input bytes as an IPv6 address.
566 * @param bytes four-byte array
567 * @return An Ipv6Prefix object
568 * @throws IllegalArgumentException if bytes has length different from 16
569 * @throws NullPointerException if bytes is null
571 public final @NonNull P6 ipv6PrefixFor(final byte @NonNull[] bytes) {
572 return prefix6Factory.newInstance(addressStringV6(bytes) + "/128");
576 * Create a Ipv6Prefix by combining the address with a mask. The address
577 * bytes are interpreted as an address and the specified mask is concatenated to
578 * it. The address bytes are not masked.
580 * @param address Input address as a 16-byte array
581 * @param mask Prefix mask
582 * @return An Ipv6Prefix object
583 * @throws IllegalArgumentException if bytes has length different from 16 or if mask is not in range 0-128
584 * @throws NullPointerException if bytes is null
586 public final @NonNull P6 ipv6PrefixFor(final byte @NonNull[] address, final int mask) {
587 checkArgument(mask >= 0 && mask <= 128, "Invalid mask %s", mask);
588 return prefix6Factory.newInstance(addressStringV6(address) + '/' + mask);
592 * Create a /128 Ipv6Prefix by interpreting input bytes as an IPv6 address.
594 * @param addr an {@link Inet6Address}
595 * @return An Ipv6Prefix object
596 * @throws IllegalArgumentException if addr is not an Inet6Address
597 * @throws NullPointerException if addr is null
599 public final @NonNull P6 ipv6PrefixFor(final @NonNull InetAddress addr) {
600 return prefix6Factory.newInstance(addressStringV6(addr) + "/128");
604 * Create a Ipv6Prefix by combining the address with a mask. The address
605 * bytes are interpreted as an address and the specified mask is concatenated to
606 * it. The address bytes are not masked.
608 * @param addr Input address
609 * @param mask Prefix mask
610 * @return An Ipv6Prefix object
611 * @throws IllegalArgumentException if addr is not an Inet6Address or if mask is not in range 0-128
612 * @throws NullPointerException if addr is null
614 public final @NonNull P6 ipv6PrefixFor(final @NonNull InetAddress addr, final int mask) {
615 checkArgument(mask >= 0 && mask <= 128, "Invalid mask %s", mask);
616 return prefix6Factory.newInstance(addressStringV6(addr) + '/' + mask);
619 public final @NonNull P6 ipv6PrefixFor(final @NonNull A6 addr) {
620 requireNonNull(addr, "Address must not be null");
621 return prefix6Factory.newInstance(stripZone(ipv6AddressString(addr)) + "/128");
624 public final @NonNull P6 ipv6PrefixFor(final @NonNull A6 addr, final int mask) {
625 requireNonNull(addr, "Address must not be null");
626 return newIpv6Prefix(stripZone(ipv6AddressString(addr)), mask);
629 public final @NonNull P6 ipv6PrefixForNoZone(final @NonNull A6NZ addr) {
630 requireNonNull(addr, "Address must not be null");
631 return prefix6Factory.newInstance(ipv6AddressString(addr) + "/128");
634 public final @NonNull P6 ipv6PrefixForNoZone(final @NonNull A6NZ addr, final int mask) {
635 requireNonNull(addr, "Address must not be null");
636 return newIpv6Prefix(ipv6AddressString(addr), mask);
639 public final @NonNull P6 ipv6PrefixForShort(final byte @NonNull[] address, final int mask) {
640 return ipv6PrefixForShort(address, 0, mask);
643 public final @NonNull P6 ipv6PrefixForShort(final byte @NonNull[] array, final int startOffset, final int mask) {
645 // Easy case, reuse the template
646 return prefix6Factory.getTemplate();
649 checkArgument(mask > 0 && mask <= 128, "Invalid mask %s", mask);
650 final int size = mask / Byte.SIZE + (mask % Byte.SIZE == 0 ? 0 : 1);
652 // Until we can instantiate an IPv6 address for a partial array, use a temporary buffer
653 byte[] tmp = new byte[INET6_LENGTH];
654 System.arraycopy(array, startOffset, tmp, 0, size);
655 return ipv6PrefixFor(tmp, mask);
658 private P6 newIpv6Prefix(final String addr, final int mask) {
659 checkArgument(mask >= 0 && mask <= 128, "Invalid mask %s", mask);
660 return prefix6Factory.newInstance(addr + '/' + mask);
663 public final @NonNull Entry<A6, Integer> splitIpv6Prefix(final @NonNull P6 prefix) {
664 return splitPrefix(address6Factory, ipv6PrefixString(prefix));
667 public final @NonNull Entry<A6NZ, Integer> splitIpv6PrefixNoZone(final @NonNull P6 prefix) {
668 return splitPrefix(address6NoZoneFactory, ipv6PrefixString(prefix));
671 private static <T> @NonNull T prefixToAddress(final StringValueObjectFactory<T> factory, final String str) {
672 return factory.newInstance(str.substring(0, str.lastIndexOf('/')));
675 private static <T> @NonNull Entry<T, Integer> splitPrefix(final StringValueObjectFactory<T> factory,
677 final int slash = str.lastIndexOf('/');
678 return new SimpleImmutableEntry<>(factory.newInstance(str.substring(0, slash)),
679 Integer.valueOf(str.substring(slash + 1)));
682 public final byte @NonNull[] ipv6PrefixToBytes(final @NonNull P6 prefix) {
683 final String str = ipv6PrefixString(prefix);
684 final byte[] bytes = new byte[INET6_LENGTH + 1];
685 final int slash = str.lastIndexOf('/');
686 Ipv6Utils.fillIpv6Bytes(bytes, str, slash);
687 bytes[INET6_LENGTH] = (byte)Integer.parseInt(str.substring(slash + 1), 10);
691 private static void appendIpv4String(final StringBuilder sb, final byte @NonNull[] bytes) {
692 checkArgument(bytes.length == INET4_LENGTH, "IPv4 address length is 4 bytes");
694 sb.append(Byte.toUnsignedInt(bytes[0]));
695 for (int i = 1; i < INET4_LENGTH; ++i) {
696 sb.append('.').append(Byte.toUnsignedInt(bytes[i]));
700 static String addressStringV4(final byte @NonNull[] bytes) {
701 final StringBuilder sb = new StringBuilder(15);
702 appendIpv4String(sb, bytes);
703 return sb.toString();
706 private static String addressStringV6(final byte @NonNull[] bytes) {
707 checkArgument(bytes.length == INET6_LENGTH, "IPv6 address length is 16 bytes");
710 return addressStringV6(Inet6Address.getByAddress(null, bytes, null));
711 } catch (UnknownHostException e) {
712 throw new IllegalArgumentException(String.format("Invalid input %s", bytes), e);
716 private static String addressStringV6(final InetAddress addr) {
717 requireNonNull(addr, "Address must not be null");
718 checkArgument(addr instanceof Inet6Address, "Address has to be an Inet6Address");
719 return addressStringV6((Inet6Address) addr);
722 private static String addressStringV6(final Inet6Address addr) {
723 return InetAddresses.toAddrString(addr);
726 private static String prefixStringV4(final byte @NonNull[] bytes) {
727 final StringBuilder sb = new StringBuilder(18);
728 appendIpv4String(sb, bytes);
729 return sb.append("/32").toString();
732 private static String prefixStringV4(final byte @NonNull[] bytes, final int mask) {
733 checkArgument(mask >= 0 && mask <= 32, "Invalid mask %s", mask);
735 final StringBuilder sb = new StringBuilder(18);
736 appendIpv4String(sb, bytes);
737 return sb.append('/').append(mask).toString();
740 private P4 v4PrefixForShort(final byte @NonNull[] array, final int startOffset, final int size, final int mask) {
741 if (startOffset == 0 && size == INET4_LENGTH && array.length == INET4_LENGTH) {
742 // Easy case, fall back to non-short
743 return ipv4PrefixFor(array, mask);
746 final StringBuilder sb = new StringBuilder(18);
749 sb.append(Byte.toUnsignedInt(array[startOffset]));
750 for (int i = 1; i < size; i++) {
751 sb.append('.').append(Byte.toUnsignedInt(array[startOffset + i]));
755 for (int i = size; i < INET4_LENGTH; i++) {
760 checkArgument(mask > 0 && mask <= 32, "Invalid mask %s", mask);
761 sb.append('/').append(mask);
763 return prefix4Factory.newInstance(sb.toString());