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 return address4Factory.newInstance(addressStringV4(addr));
252 * Create an Ipv4Address by interpreting input 32 bits as an IPv4 address in big-endian format.
254 * @param bits 32 bits, big endian
255 * @return An Ipv4Address object
257 public final @NonNull A4 ipv4AddressFor(final int bits) {
258 return address4Factory.newInstance(Ipv4Utils.addressString(bits));
262 * Create an Ipv4AddressNoZone by interpreting input bytes as an IPv4 address.
264 * @param bytes 4-byte array
265 * @return An Ipv4AddressNoZone object
266 * @throws IllegalArgumentException if bytes has length different from 4
267 * @throws NullPointerException if bytes is null
269 public final @NonNull A4NZ ipv4AddressNoZoneFor(final byte @NonNull[] bytes) {
270 return address4NoZoneFactory.newInstance(addressStringV4(bytes));
274 * Create an Ipv4AddressNoZone by interpreting an {@link Inet4Address}.
276 * @param addr An {@link Inet4Address}
277 * @return An Ipv4AddressNoZone object
278 * @throws IllegalArgumentException if addr is not an {@link Inet4Address}
279 * @throws NullPointerException if addr is null
281 public final @NonNull A4NZ ipv4AddressNoZoneFor(final @NonNull InetAddress addr) {
282 return address4NoZoneFactory.newInstance(addressStringV4(addr));
286 * Create an Ipv4AddressNoZone by interpreting input 32 bits as an IPv4 address in big-endian format.
288 * @param bits 32 bits, big endian
289 * @return An Ipv4AddressNoZone object
291 public final @NonNull A4NZ ipv4AddressNoZoneFor(final int bits) {
292 return address4NoZoneFactory.newInstance(Ipv4Utils.addressString(bits));
295 public final @NonNull A4 ipv4AddressFrom(final @NonNull P4 prefix) {
296 return prefixToAddress(address4Factory, ipv4PrefixString(prefix));
299 public final @NonNull A4NZ ipv4AddressNoZoneFrom(final @NonNull P4 prefix) {
300 return prefixToAddress(address4NoZoneFactory, ipv4PrefixString(prefix));
303 public final byte @NonNull[] ipv4AddressBytes(final @NonNull A4 addr) {
305 * This implementation relies heavily on the input string having been validated to comply with
306 * the Ipv4Address pattern, which may include a zone index.
308 final String str = ipv4AddressString(addr);
309 final int percent = str.indexOf('%');
310 return Ipv4Utils.addressBytes(str, percent == -1 ? str.length() : percent);
313 public final int ipv4AddressBits(final @NonNull A4 addr) {
314 final String str = ipv4AddressString(addr);
315 final int percent = str.indexOf('%');
316 return Ipv4Utils.addressBits(str, percent == -1 ? str.length() : percent);
319 public final byte @NonNull[] ipv4AddressNoZoneBytes(final @NonNull A4NZ addr) {
321 * This implementation relies heavily on the input string having been validated to comply with
322 * the Ipv4AddressNoZone pattern, which must not include a zone index.
324 final String str = ipv4AddressString(addr);
325 return Ipv4Utils.addressBytes(str, str.length());
328 public final int ipv4AddressNoZoneBits(final @NonNull A4NZ addr) {
329 final String str = ipv4AddressString(addr);
330 return Ipv4Utils.addressBits(str, str.length());
334 * Create a /32 Ipv4Prefix by interpreting input bytes as an IPv4 address.
336 * @param bytes four-byte array
337 * @return An Ipv4Prefix object
338 * @throws IllegalArgumentException if bytes has length different from 4
339 * @throws NullPointerException if bytes is null
341 public final @NonNull P4 ipv4PrefixFor(final byte @NonNull[] bytes) {
342 return prefix4Factory.newInstance(prefixStringV4(bytes));
346 * Create a Ipv4Prefix by combining the address with a mask. The address
347 * bytes are interpreted as an address and the specified mask is concatenated to
348 * it. The address bytes are not masked, hence input <code>address = { 1, 2, 3, 4 }</code>
349 * and <code>mask=24</code> will result in <code>1.2.3.4/24</code>.
351 * @param address Input address as a 4-byte array
352 * @param mask Prefix mask
353 * @return An Ipv4Prefix object
354 * @throws IllegalArgumentException if bytes has length different from 4 or if mask is not in range 0-32
355 * @throws NullPointerException if bytes is null
357 public final @NonNull P4 ipv4PrefixFor(final byte @NonNull[] address, final int mask) {
358 return prefix4Factory.newInstance(prefixStringV4(address, mask));
362 * Create a /32 Ipv4Prefix for an {@link Inet4Address}.
364 * @param addr An {@link Inet4Address}
365 * @return An Ipv4Prefix object
366 * @throws IllegalArgumentException if addr is not an Inet4Address
367 * @throws NullPointerException if addr is null
369 public final @NonNull P4 ipv4PrefixFor(final @NonNull InetAddress addr) {
370 return prefix4Factory.newInstance(addressStringV4(addr) + "/32");
374 * Create a Ipv4Prefix by combining the address with a mask. The address bytes are not masked.
376 * @param addr An {@link Inet4Address}
377 * @param mask Prefix mask
378 * @return An Ipv4Prefix object
379 * @throws IllegalArgumentException if addr is not an Inet4Address or if mask is not in range 0-32
380 * @throws NullPointerException if addr is null
382 public final @NonNull P4 ipv4PrefixFor(final @NonNull InetAddress addr, final int mask) {
383 return newIpv4Prefix(addressStringV4(addr), mask);
386 public final @NonNull P4 ipv4PrefixFor(final @NonNull A4 addr) {
387 requireNonNull(addr, "Address must not be null");
388 return prefix4Factory.newInstance(stripZone(ipv4AddressString(addr)) + "/32");
391 public final @NonNull P4 ipv4PrefixFor(final @NonNull A4 addr, final int mask) {
392 requireNonNull(addr, "Address must not be null");
393 return newIpv4Prefix(stripZone(ipv4AddressString(addr)), mask);
396 public final @NonNull P4 ipv4PrefixForNoZone(final @NonNull A4NZ addr) {
397 requireNonNull(addr, "Address must not be null");
398 return prefix4Factory.newInstance(ipv4AddressString(addr) + "/32");
401 public final @NonNull P4 ipv4PrefixForNoZone(final @NonNull A4NZ addr, final int mask) {
402 requireNonNull(addr, "Address must not be null");
403 return newIpv4Prefix(ipv4AddressString(addr), mask);
406 public final @NonNull P4 ipv4PrefixForShort(final byte @NonNull[] address, final int mask) {
408 // Easy case, reuse the template
409 return prefix4Factory.getTemplate();
412 return v4PrefixForShort(address, 0, mask / Byte.SIZE + (mask % Byte.SIZE == 0 ? 0 : 1), mask);
415 public final @NonNull P4 ipv4PrefixForShort(final byte @NonNull[] array, final int startOffset, final int mask) {
417 // Easy case, reuse the template
418 return prefix4Factory.getTemplate();
421 return v4PrefixForShort(array, startOffset, mask / Byte.SIZE + (mask % Byte.SIZE == 0 ? 0 : 1), mask);
424 private static String stripZone(final String str) {
425 final int percent = str.indexOf('%');
426 return percent == -1 ? str : str.substring(0, percent);
429 private @NonNull P4 newIpv4Prefix(final String addr, final int mask) {
430 checkArgument(mask >= 0 && mask <= 32, "Invalid mask %s", mask);
431 return prefix4Factory.newInstance(addr + '/' + mask);
434 public final @NonNull Entry<A4, Integer> splitIpv4Prefix(final @NonNull P4 prefix) {
435 return splitPrefix(address4Factory, ipv4PrefixString(prefix));
438 public final @NonNull Entry<A4NZ, Integer> splitIpv4PrefixNoZone(final @NonNull P4 prefix) {
439 return splitPrefix(address4NoZoneFactory, ipv4PrefixString(prefix));
442 public final byte @NonNull[] ipv4PrefixToBytes(final @NonNull P4 prefix) {
443 final String str = ipv4PrefixString(prefix);
444 final int slash = str.lastIndexOf('/');
446 final byte[] bytes = new byte[INET4_LENGTH + 1];
447 Ipv4Utils.fillIpv4Bytes(bytes, 0, str, 0, slash);
448 bytes[INET4_LENGTH] = (byte)Integer.parseInt(str.substring(slash + 1), 10);
453 * Create an Ipv6Address by interpreting input bytes as an IPv6 address.
455 * @param bytes 16-byte array
456 * @return An Ipv6Address object
457 * @throws IllegalArgumentException if bytes has length different from 16
458 * @throws NullPointerException if bytes is null
460 public final @NonNull A6 ipv6AddressFor(final byte @NonNull[] bytes) {
461 return address6Factory.newInstance(addressStringV6(bytes));
465 * Create an Ipv6Address by interpreting an {@link Inet6Address}.
467 * @param addr An {@link Inet6Address}
468 * @return An Ipv6Address object
469 * @throws IllegalArgumentException if addr is not an {@link Inet6Address}
470 * @throws NullPointerException if addr is null
472 public final @NonNull A6 ipv6AddressFor(final @NonNull InetAddress addr) {
473 return address6Factory.newInstance(addressStringV6(addr));
477 * Create an Ipv6AddressNoZone by interpreting input bytes as an IPv6 address.
479 * @param bytes 16-byte array
480 * @return An Ipv6Address object
481 * @throws IllegalArgumentException if bytes has length different from 16
482 * @throws NullPointerException if bytes is null
484 public final @NonNull A6NZ ipv6AddressNoZoneFor(final byte @NonNull[] bytes) {
485 return address6NoZoneFactory.newInstance(addressStringV6(bytes));
489 * Create an Ipv6AddressNoZone by interpreting an {@link Inet6Address}.
491 * @param addr An {@link Inet6Address}
492 * @return An Ipv6AddressNoZone object
493 * @throws IllegalArgumentException if addr is not an {@link Inet6Address}
494 * @throws NullPointerException if addr is null
496 public final @NonNull A6NZ ipv6AddressNoZoneFor(final @NonNull InetAddress addr) {
497 return address6NoZoneFactory.newInstance(addressStringV6(addr));
500 public final @NonNull A6 ipv6AddressFrom(final @NonNull P6 prefix) {
501 return prefixToAddress(address6Factory, ipv6PrefixString(prefix));
504 public final @NonNull A6NZ ipv6AddressNoZoneFrom(final @NonNull P6 prefix) {
505 return prefixToAddress(address6NoZoneFactory, ipv6PrefixString(prefix));
508 public final byte @NonNull[] ipv6AddressBytes(final @NonNull A6 addr) {
509 final String str = ipv6AddressString(addr);
510 final int percent = str.indexOf('%');
511 return ipv6StringBytes(str, percent == -1 ? str.length() : percent);
514 public final byte @NonNull[] ipv6AddressNoZoneBytes(final @NonNull A6NZ addr) {
515 final String str = ipv6AddressString(addr);
516 return ipv6StringBytes(str, str.length());
519 private static byte @NonNull[] ipv6StringBytes(final @NonNull String str, final int limit) {
520 final byte[] bytes = new byte[INET6_LENGTH];
521 Ipv6Utils.fillIpv6Bytes(bytes, str, limit);
526 * Create a /128 Ipv6Prefix by interpreting input bytes as an IPv6 address.
528 * @param bytes four-byte array
529 * @return An Ipv6Prefix object
530 * @throws IllegalArgumentException if bytes has length different from 16
531 * @throws NullPointerException if bytes is null
533 public final @NonNull P6 ipv6PrefixFor(final byte @NonNull[] bytes) {
534 return prefix6Factory.newInstance(addressStringV6(bytes) + "/128");
538 * Create a Ipv6Prefix by combining the address with a mask. The address
539 * bytes are interpreted as an address and the specified mask is concatenated to
540 * it. The address bytes are not masked.
542 * @param address Input address as a 16-byte array
543 * @param mask Prefix mask
544 * @return An Ipv6Prefix object
545 * @throws IllegalArgumentException if bytes has length different from 16 or if mask is not in range 0-128
546 * @throws NullPointerException if bytes is null
548 public final @NonNull P6 ipv6PrefixFor(final byte @NonNull[] address, final int mask) {
549 checkArgument(mask >= 0 && mask <= 128, "Invalid mask %s", mask);
550 return prefix6Factory.newInstance(addressStringV6(address) + '/' + mask);
554 * Create a /128 Ipv6Prefix by interpreting input bytes as an IPv6 address.
556 * @param addr an {@link Inet6Address}
557 * @return An Ipv6Prefix object
558 * @throws IllegalArgumentException if addr is not an Inet6Address
559 * @throws NullPointerException if addr is null
561 public final @NonNull P6 ipv6PrefixFor(final @NonNull InetAddress addr) {
562 return prefix6Factory.newInstance(addressStringV6(addr) + "/128");
566 * Create a Ipv6Prefix by combining the address with a mask. The address
567 * bytes are interpreted as an address and the specified mask is concatenated to
568 * it. The address bytes are not masked.
570 * @param addr Input address
571 * @param mask Prefix mask
572 * @return An Ipv6Prefix object
573 * @throws IllegalArgumentException if addr is not an Inet6Address or if mask is not in range 0-128
574 * @throws NullPointerException if addr is null
576 public final @NonNull P6 ipv6PrefixFor(final @NonNull InetAddress addr, final int mask) {
577 checkArgument(mask >= 0 && mask <= 128, "Invalid mask %s", mask);
578 return prefix6Factory.newInstance(addressStringV6(addr) + '/' + mask);
581 public final @NonNull P6 ipv6PrefixFor(final @NonNull A6 addr) {
582 requireNonNull(addr, "Address must not be null");
583 return prefix6Factory.newInstance(stripZone(ipv6AddressString(addr)) + "/128");
586 public final @NonNull P6 ipv6PrefixFor(final @NonNull A6 addr, final int mask) {
587 requireNonNull(addr, "Address must not be null");
588 return newIpv6Prefix(stripZone(ipv6AddressString(addr)), mask);
591 public final @NonNull P6 ipv6PrefixForNoZone(final @NonNull A6NZ addr) {
592 requireNonNull(addr, "Address must not be null");
593 return prefix6Factory.newInstance(ipv6AddressString(addr) + "/128");
596 public final @NonNull P6 ipv6PrefixForNoZone(final @NonNull A6NZ addr, final int mask) {
597 requireNonNull(addr, "Address must not be null");
598 return newIpv6Prefix(ipv6AddressString(addr), mask);
601 public final @NonNull P6 ipv6PrefixForShort(final byte @NonNull[] address, final int mask) {
602 return ipv6PrefixForShort(address, 0, mask);
605 public final @NonNull P6 ipv6PrefixForShort(final byte @NonNull[] array, final int startOffset, final int mask) {
607 // Easy case, reuse the template
608 return prefix6Factory.getTemplate();
611 checkArgument(mask > 0 && mask <= 128, "Invalid mask %s", mask);
612 final int size = mask / Byte.SIZE + (mask % Byte.SIZE == 0 ? 0 : 1);
614 // Until we can instantiate an IPv6 address for a partial array, use a temporary buffer
615 byte[] tmp = new byte[INET6_LENGTH];
616 System.arraycopy(array, startOffset, tmp, 0, size);
617 return ipv6PrefixFor(tmp, mask);
620 private P6 newIpv6Prefix(final String addr, final int mask) {
621 checkArgument(mask >= 0 && mask <= 128, "Invalid mask %s", mask);
622 return prefix6Factory.newInstance(addr + '/' + mask);
625 public final @NonNull Entry<A6, Integer> splitIpv6Prefix(final @NonNull P6 prefix) {
626 return splitPrefix(address6Factory, ipv6PrefixString(prefix));
629 public final @NonNull Entry<A6NZ, Integer> splitIpv6PrefixNoZone(final @NonNull P6 prefix) {
630 return splitPrefix(address6NoZoneFactory, ipv6PrefixString(prefix));
633 private static <T> @NonNull T prefixToAddress(final StringValueObjectFactory<T> factory, final String str) {
634 return factory.newInstance(str.substring(0, str.lastIndexOf('/')));
637 private static <T> @NonNull Entry<T, Integer> splitPrefix(final StringValueObjectFactory<T> factory,
639 final int slash = str.lastIndexOf('/');
640 return new SimpleImmutableEntry<>(factory.newInstance(str.substring(0, slash)),
641 Integer.valueOf(str.substring(slash + 1)));
644 public final byte @NonNull[] ipv6PrefixToBytes(final @NonNull P6 prefix) {
645 final String str = ipv6PrefixString(prefix);
646 final byte[] bytes = new byte[INET6_LENGTH + 1];
647 final int slash = str.lastIndexOf('/');
648 Ipv6Utils.fillIpv6Bytes(bytes, str, slash);
649 bytes[INET6_LENGTH] = (byte)Integer.parseInt(str.substring(slash + 1), 10);
653 private static void appendIpv4String(final StringBuilder sb, final byte @NonNull[] bytes) {
654 checkArgument(bytes.length == INET4_LENGTH, "IPv4 address length is 4 bytes");
656 sb.append(Byte.toUnsignedInt(bytes[0]));
657 for (int i = 1; i < INET4_LENGTH; ++i) {
658 sb.append('.').append(Byte.toUnsignedInt(bytes[i]));
662 static String addressStringV4(final byte @NonNull[] bytes) {
663 final StringBuilder sb = new StringBuilder(15);
664 appendIpv4String(sb, bytes);
665 return sb.toString();
668 private static @NonNull String addressStringV4(final InetAddress addr) {
669 requireNonNull(addr, "Address must not be null");
670 checkArgument(addr instanceof Inet4Address, "Address has to be an Inet4Address");
671 return addr.getHostAddress();
674 private static String addressStringV6(final byte @NonNull[] bytes) {
675 checkArgument(bytes.length == INET6_LENGTH, "IPv6 address length is 16 bytes");
678 return addressStringV6(Inet6Address.getByAddress(null, bytes, null));
679 } catch (UnknownHostException e) {
680 throw new IllegalArgumentException(String.format("Invalid input %s", bytes), e);
684 private static String addressStringV6(final InetAddress addr) {
685 requireNonNull(addr, "Address must not be null");
686 checkArgument(addr instanceof Inet6Address, "Address has to be an Inet6Address");
687 return addressStringV6((Inet6Address) addr);
690 private static String addressStringV6(final Inet6Address addr) {
691 return InetAddresses.toAddrString(addr);
694 private static String prefixStringV4(final byte @NonNull[] bytes) {
695 final StringBuilder sb = new StringBuilder(18);
696 appendIpv4String(sb, bytes);
697 return sb.append("/32").toString();
700 private static String prefixStringV4(final byte @NonNull[] bytes, final int mask) {
701 checkArgument(mask >= 0 && mask <= 32, "Invalid mask %s", mask);
703 final StringBuilder sb = new StringBuilder(18);
704 appendIpv4String(sb, bytes);
705 return sb.append('/').append(mask).toString();
708 private P4 v4PrefixForShort(final byte @NonNull[] array, final int startOffset, final int size, final int mask) {
709 if (startOffset == 0 && size == INET4_LENGTH && array.length == INET4_LENGTH) {
710 // Easy case, fall back to non-short
711 return ipv4PrefixFor(array, mask);
714 final StringBuilder sb = new StringBuilder(18);
717 sb.append(Byte.toUnsignedInt(array[startOffset]));
718 for (int i = 1; i < size; i++) {
719 sb.append('.').append(Byte.toUnsignedInt(array[startOffset + i]));
723 for (int i = size; i < INET4_LENGTH; i++) {
728 checkArgument(mask > 0 && mask <= 32, "Invalid mask %s", mask);
729 sb.append('/').append(mask);
731 return prefix4Factory.newInstance(sb.toString());