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;
41 protected AbstractIetfInetUtil(final Class<A4> addr4Class, final Class<A4NZ> addr4nzClass,
42 final Class<P4> prefix4Class, final Class<A6> addr6Class, final Class<A6NZ> addr6nzClass,
43 final Class<P6> prefix6Class) {
44 this.address4Factory = StringValueObjectFactory.create(addr4Class, "0.0.0.0");
45 this.address4NoZoneFactory = StringValueObjectFactory.create(addr4nzClass, "0.0.0.0");
46 this.prefix4Factory = StringValueObjectFactory.create(prefix4Class, "0.0.0.0/0");
47 this.address6Factory = StringValueObjectFactory.create(addr6Class, "::0");
48 this.address6NoZoneFactory = StringValueObjectFactory.create(addr6nzClass, "::0");
49 this.prefix6Factory = StringValueObjectFactory.create(prefix6Class, "::0/0");
52 protected abstract @NonNull A ipv4Address(@NonNull A4 addr);
54 protected abstract @NonNull ANZ ipv4AddressNoZone(@NonNull A4NZ addr);
56 protected abstract @NonNull A ipv6Address(@NonNull A6 addr);
58 protected abstract @NonNull ANZ ipv6AddressNoZone(@NonNull A6NZ addr);
60 protected abstract @Nullable A4 maybeIpv4Address(@NonNull A addr);
62 protected abstract @Nullable A4NZ maybeIpv4AddressNoZone(@NonNull ANZ addr);
64 protected abstract @Nullable A6 maybeIpv6Address(@NonNull A addr);
66 protected abstract @Nullable A6NZ maybeIpv6AddressNoZone(@NonNull ANZ addr);
68 protected abstract @NonNull P ipv4Prefix(@NonNull P4 addr);
70 protected abstract @NonNull P ipv6Prefix(@NonNull P6 addr);
72 protected abstract @NonNull String ipv4AddressString(@NonNull A4 addr);
74 protected abstract @NonNull String ipv6AddressString(@NonNull A6 addr);
76 protected abstract @NonNull String ipv4PrefixString(@NonNull P4 prefix);
78 protected abstract @NonNull String ipv6PrefixString(@NonNull P6 prefix);
81 * Create an IpAddress by interpreting input bytes as an IPv4 or IPv6 address, based on array length.
83 * @param bytes 4-byte (IPv4) or 6-byte (IPv6) array
84 * @return An IpAddress object
85 * @throws IllegalArgumentException if bytes has length different from 4 or 6
86 * @throws NullPointerException if bytes is null
88 public final @NonNull A ipAddressFor(final byte @NonNull[] bytes) {
89 switch (bytes.length) {
91 return ipv4Address(ipv4AddressFor(bytes));
93 return ipv6Address(ipv6AddressFor(bytes));
95 throw new IllegalArgumentException("Invalid array length " + bytes.length);
99 public final @NonNull A ipAddressFor(final @NonNull InetAddress addr) {
100 requireNonNull(addr, "Address must not be null");
101 if (addr instanceof Inet4Address) {
102 return ipv4Address(ipv4AddressFor(addr));
103 } else if (addr instanceof Inet6Address) {
104 return ipv6Address(ipv6AddressFor(addr));
106 throw new IllegalArgumentException("Unhandled address " + addr);
111 * Create an IpAddress by interpreting input bytes as an IPv4 or IPv6 address, based on array length.
113 * @param bytes 4-byte (IPv4) or 6-byte (IPv6) array
114 * @return A no-zone IpAddress object
115 * @throws IllegalArgumentException if bytes has length different from 4 or 6
116 * @throws NullPointerException if bytes is null
118 public final @NonNull ANZ ipAddressNoZoneFor(final byte @NonNull[] bytes) {
119 switch (bytes.length) {
121 return ipv4AddressNoZone(ipv4AddressNoZoneFor(bytes));
123 return ipv6AddressNoZone(ipv6AddressNoZoneFor(bytes));
125 throw new IllegalArgumentException("Invalid array length " + bytes.length);
129 public final @NonNull ANZ ipAddressNoZoneFor(final @NonNull InetAddress addr) {
130 requireNonNull(addr, "Address must not be null");
131 if (addr instanceof Inet4Address) {
132 return ipv4AddressNoZone(ipv4AddressNoZoneFor(addr));
133 } else if (addr instanceof Inet6Address) {
134 return ipv6AddressNoZone(ipv6AddressNoZoneFor(addr));
136 throw new IllegalArgumentException("Unhandled address " + addr);
141 * Create an IpPrefix by combining the address with a mask. The address
142 * bytes are interpreted as an address and the specified mask is concatenated to
143 * it. The address bytes are not masked.
145 * @param bytes Input address as a 4-byte (IPv4) or 16-byte (IPv6) array
146 * @param mask Prefix mask
147 * @return An IpPrefix object
148 * @throws IllegalArgumentException if bytes has length different from 4 or 16 or if mask is not
149 * in range 0-32 or 0-128 respectively
150 * @throws NullPointerException if bytes is null
152 public final @NonNull P ipPrefixFor(final byte @NonNull[] bytes, final int mask) {
153 switch (bytes.length) {
155 return ipv4Prefix(ipv4PrefixFor(bytes, mask));
157 return ipv6Prefix(ipv6PrefixFor(bytes, mask));
159 throw new IllegalArgumentException("Invalid array length " + bytes.length);
163 public final @NonNull P ipPrefixFor(final @NonNull InetAddress addr, final int mask) {
164 requireNonNull(addr, "Address must not be null");
165 if (addr instanceof Inet4Address) {
166 return ipv4Prefix(ipv4PrefixFor(addr, mask));
167 } else if (addr instanceof Inet6Address) {
168 return ipv6Prefix(ipv6PrefixFor(addr, mask));
170 throw new IllegalArgumentException("Unhandled address " + addr);
174 public final @NonNull InetAddress inetAddressFor(final @NonNull A addr) {
175 final A4 v4 = maybeIpv4Address(addr);
177 return inet4AddressFor(v4);
179 final A6 v6 = maybeIpv6Address(addr);
180 checkArgument(v6 != null, "Address %s is neither IPv4 nor IPv6", addr);
181 return inet6AddressFor(v6);
184 public final @NonNull InetAddress inetAddressForNoZone(final @NonNull ANZ addr) {
185 final A4NZ v4 = maybeIpv4AddressNoZone(addr);
187 return inet4AddressForNoZone(v4);
189 final A6NZ v6 = maybeIpv6AddressNoZone(addr);
190 checkArgument(v6 != null, "Address %s is neither IPv4 nor IPv6", addr);
191 return inet6AddressForNoZone(v6);
195 public final @NonNull Inet4Address inet4AddressFor(final @NonNull A4 addr) {
197 return (Inet4Address) InetAddress.getByAddress(ipv4AddressBytes(addr));
198 } catch (UnknownHostException e) {
199 throw new IllegalArgumentException("Invalid address " + addr, e);
203 public final @NonNull Inet4Address inet4AddressForNoZone(final @NonNull A4NZ addr) {
205 return (Inet4Address) InetAddress.getByAddress(ipv4AddressNoZoneBytes(addr));
206 } catch (UnknownHostException e) {
207 throw new IllegalArgumentException("Invalid address " + addr, e);
211 public final @NonNull Inet6Address inet6AddressFor(final @NonNull A6 addr) {
213 return (Inet6Address) InetAddress.getByAddress(ipv6AddressBytes(addr));
214 } catch (UnknownHostException e) {
215 throw new IllegalArgumentException("Invalid address " + addr, e);
219 public final @NonNull Inet6Address inet6AddressForNoZone(final @NonNull A6NZ addr) {
221 return (Inet6Address) InetAddress.getByAddress(ipv6AddressNoZoneBytes(addr));
222 } catch (UnknownHostException e) {
223 throw new IllegalArgumentException("Invalid address " + addr, e);
228 * Create an Ipv4Address by interpreting input bytes as an IPv4 address.
230 * @param bytes 4-byte array
231 * @return An Ipv4Address object
232 * @throws IllegalArgumentException if bytes has length different from 4
233 * @throws NullPointerException if bytes is null
235 public final @NonNull A4 ipv4AddressFor(final byte @NonNull[] bytes) {
236 return address4Factory.newInstance(addressStringV4(bytes));
240 * Create an Ipv4Address by interpreting an {@link Inet4Address}.
242 * @param addr An {@link Inet4Address}
243 * @return An Ipv4Address object
244 * @throws IllegalArgumentException if addr is not an {@link Inet4Address}
245 * @throws NullPointerException if addr is null
247 public final @NonNull A4 ipv4AddressFor(final @NonNull InetAddress addr) {
248 requireNonNull(addr, "Address must not be null");
249 checkArgument(addr instanceof Inet4Address, "Address has to be an Inet4Address");
250 return address4Factory.newInstance(addr.getHostAddress());
254 * Create an Ipv4Address by interpreting input 32 bits as an IPv4 address in big-endian format.
256 * @param bits 32 bits, big endian
257 * @return An Ipv4Address object
259 public final @NonNull A4 ipv4AddressFor(final int bits) {
260 return address4Factory.newInstance(addressString(bits));
264 * Create an Ipv4AddressNoZone by interpreting input bytes as an IPv4 address.
266 * @param bytes 4-byte array
267 * @return An Ipv4AddressNoZone object
268 * @throws IllegalArgumentException if bytes has length different from 4
269 * @throws NullPointerException if bytes is null
271 public final @NonNull A4NZ ipv4AddressNoZoneFor(final byte @NonNull[] bytes) {
272 return address4NoZoneFactory.newInstance(addressStringV4(bytes));
276 * Create an Ipv4AddressNoZone by interpreting an {@link Inet4Address}.
278 * @param addr An {@link Inet4Address}
279 * @return An Ipv4AddressNoZone object
280 * @throws IllegalArgumentException if addr is not an {@link Inet4Address}
281 * @throws NullPointerException if addr is null
283 public final @NonNull A4NZ ipv4AddressNoZoneFor(final @NonNull InetAddress addr) {
284 requireNonNull(addr, "Address must not be null");
285 checkArgument(addr instanceof Inet4Address, "Address has to be an Inet4Address");
286 return address4NoZoneFactory.newInstance(addr.getHostAddress());
290 * Create an Ipv4AddressNoZone by interpreting input 32 bits as an IPv4 address in big-endian format.
292 * @param bits 32 bits, big endian
293 * @return An Ipv4AddressNoZone object
295 public final @NonNull A4NZ ipv4AddressNoZoneFor(final int bits) {
296 return address4NoZoneFactory.newInstance(addressString(bits));
299 public final @NonNull A4 ipv4AddressFrom(final @NonNull P4 prefix) {
300 return prefixToAddress(address4Factory, ipv4PrefixString(prefix));
303 public final @NonNull A4NZ ipv4AddressNoZoneFrom(final @NonNull P4 prefix) {
304 return prefixToAddress(address4NoZoneFactory, ipv4PrefixString(prefix));
307 public final byte @NonNull[] ipv4AddressBytes(final @NonNull A4 addr) {
309 * This implementation relies heavily on the input string having been validated to comply with
310 * the Ipv4Address pattern, which may include a zone index.
312 final String str = ipv4AddressString(addr);
313 final int percent = str.indexOf('%');
314 return ipv4StringBytes(str, percent == -1 ? str.length() : percent);
317 public final int ipv4AddressBits(final @NonNull A4 addr) {
318 final String str = ipv4AddressString(addr);
319 final int percent = str.indexOf('%');
320 return ipv4StringBits(str, percent == -1 ? str.length() : percent);
323 public final byte @NonNull[] ipv4AddressNoZoneBytes(final @NonNull A4NZ addr) {
325 * This implementation relies heavily on the input string having been validated to comply with
326 * the Ipv4AddressNoZone pattern, which must not include a zone index.
328 final String str = ipv4AddressString(addr);
329 return ipv4StringBytes(str, str.length());
332 public final int ipv4AddressNoZoneBits(final @NonNull A4NZ addr) {
333 final String str = ipv4AddressString(addr);
334 return ipv4StringBits(str, str.length());
337 private static byte @NonNull[] ipv4StringBytes(final String str, final int limit) {
338 final byte[] bytes = new byte[INET4_LENGTH];
339 Ipv4Utils.fillIpv4Bytes(bytes, 0, str, 0, limit);
343 private static int ipv4StringBits(final String str, final int limit) {
346 for (int i = 0, shift = 24; i < limit; ++i) {
347 final char c = str.charAt(i);
349 prev |= current << shift;
353 current = 10 * current + c - '0';
356 return prev | current;
360 * Create a /32 Ipv4Prefix by interpreting input bytes as an IPv4 address.
362 * @param bytes four-byte array
363 * @return An Ipv4Prefix object
364 * @throws IllegalArgumentException if bytes has length different from 4
365 * @throws NullPointerException if bytes is null
367 public final @NonNull P4 ipv4PrefixFor(final byte @NonNull[] bytes) {
368 return prefix4Factory.newInstance(prefixStringV4(bytes));
372 * Create a Ipv4Prefix by combining the address with a mask. The address
373 * bytes are interpreted as an address and the specified mask is concatenated to
374 * it. The address bytes are not masked, hence input <code>address = { 1, 2, 3, 4 }</code>
375 * and <code>mask=24</code> will result in <code>1.2.3.4/24</code>.
377 * @param address Input address as a 4-byte array
378 * @param mask Prefix mask
379 * @return An Ipv4Prefix object
380 * @throws IllegalArgumentException if bytes has length different from 4 or if mask is not in range 0-32
381 * @throws NullPointerException if bytes is null
383 public final @NonNull P4 ipv4PrefixFor(final byte @NonNull[] address, final int mask) {
384 return prefix4Factory.newInstance(prefixStringV4(address, mask));
388 * Create a /32 Ipv4Prefix for an {@link Inet4Address}.
390 * @param addr An {@link Inet4Address}
391 * @return An Ipv4Prefix object
392 * @throws IllegalArgumentException if addr is not an Inet4Address
393 * @throws NullPointerException if addr is null
395 public final @NonNull P4 ipv4PrefixFor(final @NonNull InetAddress addr) {
396 requireNonNull(addr, "Address must not be null");
397 checkArgument(addr instanceof Inet4Address, "Address has to be an Inet4Address");
398 return prefix4Factory.newInstance(addr.getHostAddress() + "/32");
402 * Create a Ipv4Prefix by combining the address with a mask. The address bytes are not masked.
404 * @param addr An {@link Inet4Address}
405 * @param mask Prefix mask
406 * @return An Ipv4Prefix object
407 * @throws IllegalArgumentException if addr is not an Inet4Address or if mask is not in range 0-32
408 * @throws NullPointerException if addr is null
410 public final @NonNull P4 ipv4PrefixFor(final @NonNull InetAddress addr, final int mask) {
411 requireNonNull(addr, "Address must not be null");
412 checkArgument(addr instanceof Inet4Address, "Address has to be an Inet4Address");
413 return newIpv4Prefix(addr.getHostAddress(), mask);
416 public final @NonNull P4 ipv4PrefixFor(final @NonNull A4 addr) {
417 requireNonNull(addr, "Address must not be null");
418 return prefix4Factory.newInstance(stripZone(ipv4AddressString(addr)) + "/32");
421 public final @NonNull P4 ipv4PrefixFor(final @NonNull A4 addr, final int mask) {
422 requireNonNull(addr, "Address must not be null");
423 return newIpv4Prefix(stripZone(ipv4AddressString(addr)), mask);
426 public final @NonNull P4 ipv4PrefixForNoZone(final @NonNull A4NZ addr) {
427 requireNonNull(addr, "Address must not be null");
428 return prefix4Factory.newInstance(ipv4AddressString(addr) + "/32");
431 public final @NonNull P4 ipv4PrefixForNoZone(final @NonNull A4NZ addr, final int mask) {
432 requireNonNull(addr, "Address must not be null");
433 return newIpv4Prefix(ipv4AddressString(addr), mask);
436 public final @NonNull P4 ipv4PrefixForShort(final byte @NonNull[] address, final int mask) {
438 // Easy case, reuse the template
439 return prefix4Factory.getTemplate();
442 return v4PrefixForShort(address, 0, mask / Byte.SIZE + (mask % Byte.SIZE == 0 ? 0 : 1), mask);
445 public final @NonNull P4 ipv4PrefixForShort(final byte @NonNull[] array, final int startOffset, final int mask) {
447 // Easy case, reuse the template
448 return prefix4Factory.getTemplate();
451 return v4PrefixForShort(array, startOffset, mask / Byte.SIZE + (mask % Byte.SIZE == 0 ? 0 : 1), mask);
454 private static String stripZone(final String str) {
455 final int percent = str.indexOf('%');
456 return percent == -1 ? str : str.substring(0, percent);
459 private @NonNull P4 newIpv4Prefix(final String addr, final int mask) {
460 checkArgument(mask >= 0 && mask <= 32, "Invalid mask %s", mask);
461 return prefix4Factory.newInstance(addr + '/' + mask);
464 public final @NonNull Entry<A4, Integer> splitIpv4Prefix(final @NonNull P4 prefix) {
465 return splitPrefix(address4Factory, ipv4PrefixString(prefix));
468 public final @NonNull Entry<A4NZ, Integer> splitIpv4PrefixNoZone(final @NonNull P4 prefix) {
469 return splitPrefix(address4NoZoneFactory, ipv4PrefixString(prefix));
472 public final byte @NonNull[] ipv4PrefixToBytes(final @NonNull P4 prefix) {
473 final String str = ipv4PrefixString(prefix);
474 final int slash = str.lastIndexOf('/');
476 final byte[] bytes = new byte[INET4_LENGTH + 1];
477 Ipv4Utils.fillIpv4Bytes(bytes, 0, str, 0, slash);
478 bytes[INET4_LENGTH] = (byte)Integer.parseInt(str.substring(slash + 1), 10);
483 * Create an Ipv6Address by interpreting input bytes as an IPv6 address.
485 * @param bytes 16-byte array
486 * @return An Ipv6Address object
487 * @throws IllegalArgumentException if bytes has length different from 16
488 * @throws NullPointerException if bytes is null
490 public final @NonNull A6 ipv6AddressFor(final byte @NonNull[] bytes) {
491 return address6Factory.newInstance(addressStringV6(bytes));
495 * Create an Ipv6Address by interpreting an {@link Inet6Address}.
497 * @param addr An {@link Inet6Address}
498 * @return An Ipv6Address object
499 * @throws IllegalArgumentException if addr is not an {@link Inet6Address}
500 * @throws NullPointerException if addr is null
502 public final @NonNull A6 ipv6AddressFor(final @NonNull InetAddress addr) {
503 requireNonNull(addr, "Address must not be null");
504 checkArgument(addr instanceof Inet6Address, "Address has to be an Inet6Address");
505 return address6Factory.newInstance(addressStringV6(addr));
509 * Create an Ipv6AddressNoZone by interpreting input bytes as an IPv6 address.
511 * @param bytes 16-byte array
512 * @return An Ipv6Address object
513 * @throws IllegalArgumentException if bytes has length different from 16
514 * @throws NullPointerException if bytes is null
516 public final @NonNull A6NZ ipv6AddressNoZoneFor(final byte @NonNull[] bytes) {
517 return address6NoZoneFactory.newInstance(addressStringV6(bytes));
521 * Create an Ipv6AddressNoZone by interpreting an {@link Inet6Address}.
523 * @param addr An {@link Inet6Address}
524 * @return An Ipv6AddressNoZone object
525 * @throws IllegalArgumentException if addr is not an {@link Inet6Address}
526 * @throws NullPointerException if addr is null
528 public final @NonNull A6NZ ipv6AddressNoZoneFor(final @NonNull InetAddress addr) {
529 requireNonNull(addr, "Address must not be null");
530 checkArgument(addr instanceof Inet6Address, "Address has to be an Inet6Address");
531 return address6NoZoneFactory.newInstance(addressStringV6(addr));
534 public final @NonNull A6 ipv6AddressFrom(final @NonNull P6 prefix) {
535 return prefixToAddress(address6Factory, ipv6PrefixString(prefix));
538 public final @NonNull A6NZ ipv6AddressNoZoneFrom(final @NonNull P6 prefix) {
539 return prefixToAddress(address6NoZoneFactory, ipv6PrefixString(prefix));
542 public final byte @NonNull[] ipv6AddressBytes(final @NonNull A6 addr) {
543 final String str = ipv6AddressString(addr);
544 final int percent = str.indexOf('%');
545 return ipv6StringBytes(str, percent == -1 ? str.length() : percent);
548 public final byte @NonNull[] ipv6AddressNoZoneBytes(final @NonNull A6NZ addr) {
549 final String str = ipv6AddressString(addr);
550 return ipv6StringBytes(str, str.length());
553 private static byte @NonNull[] ipv6StringBytes(final @NonNull String str, final int limit) {
554 final byte[] bytes = new byte[INET6_LENGTH];
555 Ipv6Utils.fillIpv6Bytes(bytes, str, limit);
560 * Create a /128 Ipv6Prefix by interpreting input bytes as an IPv6 address.
562 * @param bytes four-byte array
563 * @return An Ipv6Prefix object
564 * @throws IllegalArgumentException if bytes has length different from 16
565 * @throws NullPointerException if bytes is null
567 public final @NonNull P6 ipv6PrefixFor(final byte @NonNull[] bytes) {
568 return prefix6Factory.newInstance(addressStringV6(bytes) + "/128");
572 * Create a Ipv6Prefix by combining the address with a mask. The address
573 * bytes are interpreted as an address and the specified mask is concatenated to
574 * it. The address bytes are not masked.
576 * @param address Input address as a 16-byte array
577 * @param mask Prefix mask
578 * @return An Ipv6Prefix object
579 * @throws IllegalArgumentException if bytes has length different from 16 or if mask is not in range 0-128
580 * @throws NullPointerException if bytes is null
582 public final @NonNull P6 ipv6PrefixFor(final byte @NonNull[] address, final int mask) {
583 checkArgument(mask >= 0 && mask <= 128, "Invalid mask %s", mask);
584 return prefix6Factory.newInstance(addressStringV6(address) + '/' + mask);
588 * Create a /128 Ipv6Prefix by interpreting input bytes as an IPv4 address.
590 * @param addr an {@link Inet6Address}
591 * @return An Ipv6Prefix object
592 * @throws IllegalArgumentException if addr is not an Inet6Address or if mask is not in range 0-128
593 * @throws NullPointerException if addr is null
595 public final @NonNull P6 ipv6PrefixFor(final @NonNull InetAddress addr) {
596 return prefix6Factory.newInstance(addressStringV6(addr) + "/128");
600 * Create a Ipv6Prefix by combining the address with a mask. The address
601 * bytes are interpreted as an address and the specified mask is concatenated to
602 * it. The address bytes are not masked.
604 * @param addr Input address
605 * @param mask Prefix mask
606 * @return An Ipv6Prefix object
607 * @throws IllegalArgumentException if addr is not an Inet6Address or if mask is not in range 0-128
608 * @throws NullPointerException if addr is null
610 public final @NonNull P6 ipv6PrefixFor(final @NonNull InetAddress addr, final int mask) {
611 requireNonNull(addr, "Address must not be null");
612 checkArgument(addr instanceof Inet6Address, "Address has to be an Inet6Address");
613 checkArgument(mask >= 0 && mask <= 128, "Invalid mask %s", mask);
614 return prefix6Factory.newInstance(addressStringV6(addr) + '/' + mask);
617 public final @NonNull P6 ipv6PrefixFor(final @NonNull A6 addr) {
618 requireNonNull(addr, "Address must not be null");
619 return prefix6Factory.newInstance(stripZone(ipv6AddressString(addr)) + "/128");
622 public final @NonNull P6 ipv6PrefixFor(final @NonNull A6 addr, final int mask) {
623 requireNonNull(addr, "Address must not be null");
624 return newIpv6Prefix(stripZone(ipv6AddressString(addr)), mask);
627 public final @NonNull P6 ipv6PrefixForNoZone(final @NonNull A6NZ addr) {
628 requireNonNull(addr, "Address must not be null");
629 return prefix6Factory.newInstance(ipv6AddressString(addr) + "/128");
632 public final @NonNull P6 ipv6PrefixForNoZone(final @NonNull A6NZ addr, final int mask) {
633 requireNonNull(addr, "Address must not be null");
634 return newIpv6Prefix(ipv6AddressString(addr), mask);
637 public final @NonNull P6 ipv6PrefixForShort(final byte @NonNull[] address, final int mask) {
638 return ipv6PrefixForShort(address, 0, mask);
641 public final @NonNull P6 ipv6PrefixForShort(final byte @NonNull[] array, final int startOffset, final int mask) {
643 // Easy case, reuse the template
644 return prefix6Factory.getTemplate();
647 checkArgument(mask > 0 && mask <= 128, "Invalid mask %s", mask);
648 final int size = mask / Byte.SIZE + (mask % Byte.SIZE == 0 ? 0 : 1);
650 // Until we can instantiate an IPv6 address for a partial array, use a temporary buffer
651 byte[] tmp = new byte[INET6_LENGTH];
652 System.arraycopy(array, startOffset, tmp, 0, size);
653 return ipv6PrefixFor(tmp, mask);
656 private P6 newIpv6Prefix(final String addr, final int mask) {
657 checkArgument(mask >= 0 && mask <= 128, "Invalid mask %s", mask);
658 return prefix6Factory.newInstance(addr + '/' + mask);
661 public final @NonNull Entry<A6, Integer> splitIpv6Prefix(final @NonNull P6 prefix) {
662 return splitPrefix(address6Factory, ipv6PrefixString(prefix));
665 public final @NonNull Entry<A6NZ, Integer> splitIpv6PrefixNoZone(final @NonNull P6 prefix) {
666 return splitPrefix(address6NoZoneFactory, ipv6PrefixString(prefix));
669 private static <T> @NonNull T prefixToAddress(final StringValueObjectFactory<T> factory, final String str) {
670 return factory.newInstance(str.substring(0, str.lastIndexOf('/')));
673 private static <T> @NonNull Entry<T, Integer> splitPrefix(final StringValueObjectFactory<T> factory,
675 final int slash = str.lastIndexOf('/');
676 return new SimpleImmutableEntry<>(factory.newInstance(str.substring(0, slash)),
677 Integer.valueOf(str.substring(slash + 1)));
680 public final byte @NonNull[] ipv6PrefixToBytes(final @NonNull P6 prefix) {
681 final String str = ipv6PrefixString(prefix);
682 final byte[] bytes = new byte[INET6_LENGTH + 1];
683 final int slash = str.lastIndexOf('/');
684 Ipv6Utils.fillIpv6Bytes(bytes, str, slash);
685 bytes[INET6_LENGTH] = (byte)Integer.parseInt(str.substring(slash + 1), 10);
689 private static void appendIpv4String(final StringBuilder sb, final byte @NonNull[] bytes) {
690 checkArgument(bytes.length == INET4_LENGTH, "IPv4 address length is 4 bytes");
692 sb.append(Byte.toUnsignedInt(bytes[0]));
693 for (int i = 1; i < INET4_LENGTH; ++i) {
694 sb.append('.').append(Byte.toUnsignedInt(bytes[i]));
698 private static String addressString(final int bits) {
699 return new StringBuilder(15)
700 .append(bits >>> 24).append('.')
701 .append(bits >>> 16 & 0xFF).append('.')
702 .append(bits >>> 8 & 0xFF).append('.')
707 static String addressStringV4(final byte @NonNull[] bytes) {
708 final StringBuilder sb = new StringBuilder(15);
709 appendIpv4String(sb, bytes);
710 return sb.toString();
713 private static String addressStringV6(final byte @NonNull[] bytes) {
714 checkArgument(bytes.length == INET6_LENGTH, "IPv6 address length is 16 bytes");
717 return addressStringV6(Inet6Address.getByAddress(bytes));
718 } catch (UnknownHostException e) {
719 throw new IllegalArgumentException(String.format("Invalid input %s", bytes), e);
723 private static String addressStringV6(final InetAddress addr) {
724 return InetAddresses.toAddrString(addr);
727 private static String prefixStringV4(final byte @NonNull[] bytes) {
728 final StringBuilder sb = new StringBuilder(18);
729 appendIpv4String(sb, bytes);
730 return sb.append("/32").toString();
733 private static String prefixStringV4(final byte @NonNull[] bytes, final int mask) {
734 checkArgument(mask >= 0 && mask <= 32, "Invalid mask %s", mask);
736 final StringBuilder sb = new StringBuilder(18);
737 appendIpv4String(sb, bytes);
738 return sb.append('/').append(mask).toString();
741 private P4 v4PrefixForShort(final byte @NonNull[] array, final int startOffset, final int size, final int mask) {
742 if (startOffset == 0 && size == INET4_LENGTH && array.length == INET4_LENGTH) {
743 // Easy case, fall back to non-short
744 return ipv4PrefixFor(array, mask);
747 final StringBuilder sb = new StringBuilder(18);
750 sb.append(Byte.toUnsignedInt(array[startOffset]));
751 for (int i = 1; i < size; i++) {
752 sb.append('.').append(Byte.toUnsignedInt(array[startOffset + i]));
756 for (int i = size; i < INET4_LENGTH; i++) {
761 checkArgument(mask > 0 && mask <= 32, "Invalid mask %s", mask);
762 sb.append('/').append(mask);
764 return prefix4Factory.newInstance(sb.toString());