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 final StringValueObjectFactory<A4NZ> address4NoZoneFactory;
32 private final StringValueObjectFactory<P4> prefix4Factory;
33 private final StringValueObjectFactory<A6NZ> address6NoZoneFactory;
34 private final StringValueObjectFactory<P6> prefix6Factory;
35 private final Class<A4NZ> addr4nzClass;
36 private final Class<A6NZ> addr6nzClass;
38 protected AbstractIetfInetUtil(final Class<A4NZ> addr4nzClass, final Class<P4> prefix4Class,
39 final Class<A6NZ> addr6nzClass, final Class<P6> prefix6Class) {
40 this.addr4nzClass = requireNonNull(addr4nzClass);
41 this.addr6nzClass = requireNonNull(addr6nzClass);
42 this.address4NoZoneFactory = StringValueObjectFactory.create(addr4nzClass, "0.0.0.0");
43 this.prefix4Factory = StringValueObjectFactory.create(prefix4Class, "0.0.0.0/0");
44 this.address6NoZoneFactory = StringValueObjectFactory.create(addr6nzClass, "::0");
45 this.prefix6Factory = StringValueObjectFactory.create(prefix6Class, "::0/0");
48 protected abstract @NonNull A ipv4Address(@NonNull A4NZ addr);
50 protected abstract @NonNull ANZ ipv4AddressNoZone(@NonNull A4NZ addr);
52 protected abstract @NonNull A ipv6Address(@NonNull A6NZ addr);
54 protected abstract @NonNull ANZ ipv6AddressNoZone(@NonNull A6NZ addr);
56 protected abstract @Nullable A4 maybeIpv4Address(@NonNull A addr);
58 protected abstract @Nullable A4NZ maybeIpv4AddressNoZone(@NonNull ANZ addr);
60 protected abstract @Nullable A6 maybeIpv6Address(@NonNull A addr);
62 protected abstract @Nullable A6NZ maybeIpv6AddressNoZone(@NonNull ANZ addr);
64 protected abstract @NonNull P ipv4Prefix(@NonNull P4 addr);
66 protected abstract @NonNull P ipv6Prefix(@NonNull P6 addr);
68 protected abstract @NonNull String ipv4AddressString(@NonNull A4 addr);
70 protected abstract @NonNull String ipv6AddressString(@NonNull A6 addr);
72 protected abstract @NonNull String ipv4PrefixString(@NonNull P4 prefix);
74 protected abstract @NonNull String ipv6PrefixString(@NonNull P6 prefix);
77 * Create an IpAddress by interpreting input bytes as an IPv4 or IPv6 address, based on array length.
79 * @param bytes 4-byte (IPv4) or 6-byte (IPv6) array
80 * @return An IpAddress object
81 * @throws IllegalArgumentException if bytes has length different from 4 or 6
82 * @throws NullPointerException if bytes is null
84 public final @NonNull A ipAddressFor(final byte @NonNull[] bytes) {
85 return switch (bytes.length) {
86 case Ipv4Utils.INET4_LENGTH -> ipv4Address(ipv4AddressFor(bytes));
87 case Ipv6Utils.INET6_LENGTH -> ipv6Address(ipv6AddressFor(bytes));
88 default -> throwInvalidArray(bytes);
92 public final @NonNull A ipAddressFor(final @NonNull InetAddress addr) {
94 if (addr instanceof Inet4Address) {
95 return ipv4Address(ipv4AddressFor(addr));
96 } else if (addr instanceof Inet6Address) {
97 return ipv6Address(ipv6AddressFor(addr));
99 throw unhandledAddress(addr);
103 private static <T> @NonNull T requireAddress(final T addr) {
104 return requireNonNull(addr, "Address must not be null");
108 * Create an IpAddress by interpreting input bytes as an IPv4 or IPv6 address, based on array length.
110 * @param bytes 4-byte (IPv4) or 6-byte (IPv6) array
111 * @return A no-zone IpAddress object
112 * @throws IllegalArgumentException if bytes has length different from 4 or 6
113 * @throws NullPointerException if bytes is null
115 public final @NonNull ANZ ipAddressNoZoneFor(final byte @NonNull[] bytes) {
116 return switch (bytes.length) {
117 case Ipv4Utils.INET4_LENGTH -> ipv4AddressNoZone(ipv4AddressFor(bytes));
118 case Ipv6Utils.INET6_LENGTH -> ipv6AddressNoZone(ipv6AddressFor(bytes));
119 default -> throwInvalidArray(bytes);
123 public final @NonNull ANZ ipAddressNoZoneFor(final @NonNull InetAddress addr) {
124 requireAddress(addr);
125 if (addr instanceof Inet4Address) {
126 return ipv4AddressNoZone(ipv4AddressFor(addr));
127 } else if (addr instanceof Inet6Address) {
128 return ipv6AddressNoZone(ipv6AddressFor(addr));
130 throw unhandledAddress(addr);
134 private static <T> T throwInvalidArray(final byte[] bytes) {
135 throw new IllegalArgumentException("Invalid array length " + bytes.length);
138 private static IllegalArgumentException unhandledAddress(final InetAddress addr) {
139 return new IllegalArgumentException("Unhandled address " + addr);
143 * Create an IpPrefix by combining the address with a mask. The address
144 * bytes are interpreted as an address and the specified mask is concatenated to
145 * it. The address bytes are not masked.
147 * @param bytes Input address as a 4-byte (IPv4) or 16-byte (IPv6) array
148 * @param mask Prefix mask
149 * @return An IpPrefix object
150 * @throws IllegalArgumentException if bytes has length different from 4 or 16 or if mask is not
151 * in range 0-32 or 0-128 respectively
152 * @throws NullPointerException if bytes is null
154 public final @NonNull P ipPrefixFor(final byte @NonNull[] bytes, final int mask) {
155 return switch (bytes.length) {
156 case Ipv4Utils.INET4_LENGTH -> ipv4Prefix(ipv4PrefixFor(bytes, mask));
157 case Ipv6Utils.INET6_LENGTH -> ipv6Prefix(ipv6PrefixFor(bytes, mask));
158 default -> throwInvalidArray(bytes);
162 public final @NonNull P ipPrefixFor(final @NonNull InetAddress addr, final int mask) {
163 requireAddress(addr);
164 if (addr instanceof Inet4Address) {
165 return ipv4Prefix(ipv4PrefixFor(addr, mask));
166 } else if (addr instanceof Inet6Address) {
167 return ipv6Prefix(ipv6PrefixFor(addr, mask));
169 throw unhandledAddress(addr);
173 public final @NonNull P ipPrefixFor(final @NonNull A addr) {
174 final A4 v4 = maybeIpv4Address(addr);
175 return v4 != null ? ipv4Prefix(ipv4PrefixFor(v4)) : ipv6Prefix(ipv6PrefixFor(coerceIpv6Address(addr)));
178 public final @NonNull P ipPrefixForNoZone(final @NonNull ANZ addr) {
179 final A4NZ v4 = maybeIpv4AddressNoZone(addr);
180 return v4 != null ? ipv4Prefix(ipv4PrefixFor(inet4AddressForNoZone(v4)))
181 : ipv6Prefix(ipv6PrefixFor(coerceIpv6AddressNoZone(addr)));
184 public final @NonNull InetAddress inetAddressFor(final @NonNull A addr) {
185 final A4 v4 = maybeIpv4Address(addr);
186 return v4 != null ? inet4AddressFor(v4) : inet6AddressFor(coerceIpv6Address(addr));
189 public final @NonNull InetAddress inetAddressForNoZone(final @NonNull ANZ addr) {
190 final A4NZ v4 = maybeIpv4AddressNoZone(addr);
191 return v4 != null ? inet4AddressForNoZone(v4) : inet6AddressForNoZone(coerceIpv6AddressNoZone(addr));
194 public final @NonNull Inet4Address inet4AddressFor(final @NonNull A4 addr) {
196 return (Inet4Address) InetAddress.getByAddress(ipv4AddressBytes(addr));
197 } catch (UnknownHostException e) {
198 throw new IllegalArgumentException("Invalid address " + addr, e);
202 public final @NonNull Inet4Address inet4AddressForNoZone(final @NonNull A4NZ addr) {
204 return (Inet4Address) InetAddress.getByAddress(ipv4AddressNoZoneBytes(addr));
205 } catch (UnknownHostException e) {
206 throw new IllegalArgumentException("Invalid address " + addr, e);
210 public final @NonNull Inet6Address inet6AddressFor(final @NonNull A6 addr) {
212 return (Inet6Address) InetAddress.getByAddress(ipv6AddressBytes(addr));
213 } catch (UnknownHostException e) {
214 throw new IllegalArgumentException("Invalid address " + addr, e);
218 public final @NonNull Inet6Address inet6AddressForNoZone(final @NonNull A6NZ addr) {
220 return (Inet6Address) InetAddress.getByAddress(ipv6AddressNoZoneBytes(addr));
221 } catch (UnknownHostException e) {
222 throw new IllegalArgumentException("Invalid address " + addr, e);
227 * Create an Ipv4AddressNoZone by interpreting input bytes as an IPv4 address.
229 * @param bytes 4-byte array
230 * @return An Ipv4AddressNoZone object
231 * @throws IllegalArgumentException if bytes has length different from 4
232 * @throws NullPointerException if bytes is null
234 public final @NonNull A4NZ ipv4AddressFor(final byte @NonNull[] bytes) {
235 return address4NoZoneFactory.newInstance(Ipv4Utils.addressString(bytes));
239 * Create an Ipv4AddressNoZone by interpreting an {@link Inet4Address}.
241 * @param addr An {@link Inet4Address}
242 * @return An Ipv4AddressNoZone object
243 * @throws IllegalArgumentException if addr is not an {@link Inet4Address}
244 * @throws NullPointerException if addr is null
246 public final @NonNull A4NZ ipv4AddressFor(final @NonNull InetAddress addr) {
247 return address4NoZoneFactory.newInstance(addressStringV4(addr));
251 * Create an Ipv4AddressNoZone by interpreting input 32 bits as an IPv4 address in big-endian format.
253 * @param bits 32 bits, big endian
254 * @return An Ipv4AddressNoZone object
256 public final @NonNull A4NZ ipv4AddressFor(final int bits) {
257 return address4NoZoneFactory.newInstance(Ipv4Utils.addressString(bits));
261 * Create an Ipv4AddressNoZone by interpreting an Ipv4Address.
263 * @param addr An Ipv4Address
264 * @return An Ipv4AddressNoZone object
265 * @throws NullPointerException if addr is null
267 public final @NonNull A4NZ ipv4AddressNoZoneFor(final @NonNull A4 addr) {
268 requireAddress(addr);
269 return addr4nzClass.isInstance(addr) ? addr4nzClass.cast(addr)
270 : address4NoZoneFactory.newInstance(stripZone(ipv4AddressString(addr)));
273 public final @NonNull A4NZ ipv4AddressFrom(final @NonNull P4 prefix) {
274 return prefixToAddress(address4NoZoneFactory, ipv4PrefixString(prefix));
277 public final byte @NonNull[] ipv4AddressBytes(final @NonNull A4 addr) {
279 * This implementation relies heavily on the input string having been validated to comply with
280 * the Ipv4Address pattern, which may include a zone index.
282 final String str = ipv4AddressString(addr);
283 final int percent = str.indexOf('%');
284 return Ipv4Utils.addressBytes(str, percent == -1 ? str.length() : percent);
287 public final int ipv4AddressBits(final @NonNull A4 addr) {
288 final String str = ipv4AddressString(addr);
289 final int percent = str.indexOf('%');
290 return Ipv4Utils.addressBits(str, percent == -1 ? str.length() : percent);
293 public final byte @NonNull[] ipv4AddressNoZoneBytes(final @NonNull A4NZ addr) {
295 * This implementation relies heavily on the input string having been validated to comply with
296 * the Ipv4AddressNoZone pattern, which must not include a zone index.
298 final String str = ipv4AddressString(addr);
299 return Ipv4Utils.addressBytes(str, str.length());
302 public final int ipv4AddressNoZoneBits(final @NonNull A4NZ addr) {
303 final String str = ipv4AddressString(addr);
304 return Ipv4Utils.addressBits(str, str.length());
308 * Create a /32 Ipv4Prefix by interpreting input bytes as an IPv4 address.
310 * @param bytes four-byte array
311 * @return An Ipv4Prefix object
312 * @throws IllegalArgumentException if bytes has length different from 4
313 * @throws NullPointerException if bytes is null
315 public final @NonNull P4 ipv4PrefixFor(final byte @NonNull[] bytes) {
316 return prefix4Factory.newInstance(prefixStringV4(bytes));
320 * Create a Ipv4Prefix by combining the address with a mask. The address
321 * bytes are interpreted as an address and the specified mask is concatenated to
322 * it. The address bytes are not masked, hence input <code>address = { 1, 2, 3, 4 }</code>
323 * and <code>mask=24</code> will result in <code>1.2.3.4/24</code>.
325 * @param address Input address as a 4-byte array
326 * @param mask Prefix mask
327 * @return An Ipv4Prefix object
328 * @throws IllegalArgumentException if bytes has length different from 4 or if mask is not in range 0-32
329 * @throws NullPointerException if bytes is null
331 public final @NonNull P4 ipv4PrefixFor(final byte @NonNull[] address, final int mask) {
332 return prefix4Factory.newInstance(prefixStringV4(address, mask));
336 * Create a /32 Ipv4Prefix for an {@link Inet4Address}.
338 * @param addr An {@link Inet4Address}
339 * @return An Ipv4Prefix object
340 * @throws IllegalArgumentException if addr is not an Inet4Address
341 * @throws NullPointerException if addr is null
343 public final @NonNull P4 ipv4PrefixFor(final @NonNull InetAddress addr) {
344 return prefix4Factory.newInstance(addressStringV4(addr) + "/32");
348 * Create a Ipv4Prefix by combining the address with a mask. The address bytes are not masked.
350 * @param addr An {@link Inet4Address}
351 * @param mask Prefix mask
352 * @return An Ipv4Prefix object
353 * @throws IllegalArgumentException if addr is not an Inet4Address or if mask is not in range 0-32
354 * @throws NullPointerException if addr is null
356 public final @NonNull P4 ipv4PrefixFor(final @NonNull InetAddress addr, final int mask) {
357 return newIpv4Prefix(addressStringV4(addr), mask);
360 public final @NonNull P4 ipv4PrefixFor(final @NonNull A4 addr) {
361 return prefix4Factory.newInstance(stripZone(ipv4AddressString(requireAddress(addr))) + "/32");
364 public final @NonNull P4 ipv4PrefixFor(final @NonNull A4 addr, final int mask) {
365 return newIpv4Prefix(stripZone(ipv4AddressString(requireAddress(addr))), mask);
368 public final @NonNull P4 ipv4PrefixForNoZone(final @NonNull A4NZ addr) {
369 return prefix4Factory.newInstance(ipv4AddressString(requireAddress(addr)) + "/32");
372 public final @NonNull P4 ipv4PrefixForNoZone(final @NonNull A4NZ addr, final int mask) {
373 return newIpv4Prefix(ipv4AddressString(requireAddress(addr)), mask);
376 public final @NonNull P4 ipv4PrefixForShort(final byte @NonNull[] address, final int mask) {
378 // Easy case, reuse the template
379 return prefix4Factory.getTemplate();
382 return v4PrefixForShort(address, 0, mask / Byte.SIZE + (mask % Byte.SIZE == 0 ? 0 : 1), mask);
385 public final @NonNull P4 ipv4PrefixForShort(final byte @NonNull[] array, final int startOffset, final int mask) {
387 // Easy case, reuse the template
388 return prefix4Factory.getTemplate();
391 return v4PrefixForShort(array, startOffset, mask / Byte.SIZE + (mask % Byte.SIZE == 0 ? 0 : 1), mask);
394 private static String stripZone(final String str) {
395 final int percent = str.indexOf('%');
396 return percent == -1 ? str : str.substring(0, percent);
399 private @NonNull P4 newIpv4Prefix(final String addr, final int mask) {
400 checkArgument(mask >= 0 && mask <= 32, "Invalid mask %s", mask);
401 return prefix4Factory.newInstance(addr + '/' + mask);
404 public final @NonNull Entry<A4NZ, Integer> splitIpv4Prefix(final @NonNull P4 prefix) {
405 return splitPrefix(address4NoZoneFactory, ipv4PrefixString(prefix));
408 public final byte @NonNull[] ipv4PrefixToBytes(final @NonNull P4 prefix) {
409 final String str = ipv4PrefixString(prefix);
410 final int slash = str.lastIndexOf('/');
412 final byte[] bytes = new byte[Ipv4Utils.INET4_LENGTH + 1];
413 Ipv4Utils.fillIpv4Bytes(bytes, 0, str, 0, slash);
414 bytes[Ipv4Utils.INET4_LENGTH] = (byte)Integer.parseInt(str.substring(slash + 1), 10);
419 * Create an Ipv6Address by interpreting input bytes as an IPv6 address.
421 * @param bytes 16-byte array
422 * @return An Ipv6Address object
423 * @throws IllegalArgumentException if bytes has length different from 16
424 * @throws NullPointerException if bytes is null
426 public final @NonNull A6NZ ipv6AddressFor(final byte @NonNull[] bytes) {
427 return address6NoZoneFactory.newInstance(addressStringV6(bytes));
431 * Create an Ipv6Address by interpreting an {@link Inet6Address}.
433 * @param addr An {@link Inet6Address}
434 * @return An Ipv6Address object
435 * @throws IllegalArgumentException if addr is not an {@link Inet6Address}
436 * @throws NullPointerException if addr is null
438 public final @NonNull A6NZ ipv6AddressFor(final @NonNull InetAddress addr) {
439 return address6NoZoneFactory.newInstance(addressStringV6(addr));
443 * Create an Ipv6AddressNoZone by interpreting an Ipv6Address.
445 * @param addr An Ipv6Address
446 * @return An Ipv6AddressNoZone object
447 * @throws NullPointerException if addr is null
449 public final @NonNull A6NZ ipv6AddressNoZoneFor(final @NonNull A6 addr) {
450 requireAddress(addr);
451 return addr6nzClass.isInstance(addr) ? addr6nzClass.cast(addr)
452 : address6NoZoneFactory.newInstance(stripZone(ipv6AddressString(addr)));
455 public final @NonNull A6NZ ipv6AddressFrom(final @NonNull P6 prefix) {
456 return prefixToAddress(address6NoZoneFactory, ipv6PrefixString(prefix));
459 public final byte @NonNull[] ipv6AddressBytes(final @NonNull A6 addr) {
460 final String str = ipv6AddressString(addr);
461 final int percent = str.indexOf('%');
462 return ipv6StringBytes(str, percent == -1 ? str.length() : percent);
465 public final byte @NonNull[] ipv6AddressNoZoneBytes(final @NonNull A6NZ addr) {
466 final String str = ipv6AddressString(addr);
467 return ipv6StringBytes(str, str.length());
470 private static byte @NonNull[] ipv6StringBytes(final @NonNull String str, final int limit) {
471 final byte[] bytes = new byte[Ipv6Utils.INET6_LENGTH];
472 Ipv6Utils.fillIpv6Bytes(bytes, str, limit);
477 * Create a /128 Ipv6Prefix by interpreting input bytes as an IPv6 address.
479 * @param bytes four-byte array
480 * @return An Ipv6Prefix object
481 * @throws IllegalArgumentException if bytes has length different from 16
482 * @throws NullPointerException if bytes is null
484 public final @NonNull P6 ipv6PrefixFor(final byte @NonNull[] bytes) {
485 return prefix6Factory.newInstance(addressStringV6(bytes) + "/128");
489 * Create a Ipv6Prefix by combining the address with a mask. The address
490 * bytes are interpreted as an address and the specified mask is concatenated to
491 * it. The address bytes are not masked.
493 * @param address Input address as a 16-byte array
494 * @param mask Prefix mask
495 * @return An Ipv6Prefix object
496 * @throws IllegalArgumentException if bytes has length different from 16 or if mask is not in range 0-128
497 * @throws NullPointerException if bytes is null
499 public final @NonNull P6 ipv6PrefixFor(final byte @NonNull[] address, final int mask) {
500 checkArgument(mask >= 0 && mask <= 128, "Invalid mask %s", mask);
501 return prefix6Factory.newInstance(addressStringV6(address) + '/' + mask);
505 * Create a /128 Ipv6Prefix by interpreting input bytes as an IPv6 address.
507 * @param addr an {@link Inet6Address}
508 * @return An Ipv6Prefix object
509 * @throws IllegalArgumentException if addr is not an Inet6Address
510 * @throws NullPointerException if addr is null
512 public final @NonNull P6 ipv6PrefixFor(final @NonNull InetAddress addr) {
513 return prefix6Factory.newInstance(addressStringV6(addr) + "/128");
517 * Create a Ipv6Prefix by combining the address with a mask. The address
518 * bytes are interpreted as an address and the specified mask is concatenated to
519 * it. The address bytes are not masked.
521 * @param addr Input address
522 * @param mask Prefix mask
523 * @return An Ipv6Prefix object
524 * @throws IllegalArgumentException if addr is not an Inet6Address or if mask is not in range 0-128
525 * @throws NullPointerException if addr is null
527 public final @NonNull P6 ipv6PrefixFor(final @NonNull InetAddress addr, final int mask) {
528 checkArgument(mask >= 0 && mask <= 128, "Invalid mask %s", mask);
529 return prefix6Factory.newInstance(addressStringV6(addr) + '/' + mask);
532 public final @NonNull P6 ipv6PrefixFor(final @NonNull A6 addr) {
533 return prefix6Factory.newInstance(stripZone(ipv6AddressString(requireAddress(addr))) + "/128");
536 public final @NonNull P6 ipv6PrefixFor(final @NonNull A6 addr, final int mask) {
537 return newIpv6Prefix(stripZone(ipv6AddressString(requireAddress(addr))), mask);
540 public final @NonNull P6 ipv6PrefixForNoZone(final @NonNull A6NZ addr) {
541 return prefix6Factory.newInstance(ipv6AddressString(requireAddress(addr)) + "/128");
544 public final @NonNull P6 ipv6PrefixForNoZone(final @NonNull A6NZ addr, final int mask) {
545 return newIpv6Prefix(ipv6AddressString(requireAddress(addr)), mask);
548 public final @NonNull P6 ipv6PrefixForShort(final byte @NonNull[] address, final int mask) {
549 return ipv6PrefixForShort(address, 0, mask);
552 public final @NonNull P6 ipv6PrefixForShort(final byte @NonNull[] array, final int startOffset, final int mask) {
554 // Easy case, reuse the template
555 return prefix6Factory.getTemplate();
558 checkArgument(mask > 0 && mask <= 128, "Invalid mask %s", mask);
559 final int size = mask / Byte.SIZE + (mask % Byte.SIZE == 0 ? 0 : 1);
561 // Until we can instantiate an IPv6 address for a partial array, use a temporary buffer
562 byte[] tmp = new byte[Ipv6Utils.INET6_LENGTH];
563 System.arraycopy(array, startOffset, tmp, 0, size);
564 return ipv6PrefixFor(tmp, mask);
567 private P6 newIpv6Prefix(final String addr, final int mask) {
568 checkArgument(mask >= 0 && mask <= 128, "Invalid mask %s", mask);
569 return prefix6Factory.newInstance(addr + '/' + mask);
572 public final @NonNull Entry<A6NZ, Integer> splitIpv6Prefix(final @NonNull P6 prefix) {
573 return splitPrefix(address6NoZoneFactory, ipv6PrefixString(prefix));
576 private static <T> @NonNull T prefixToAddress(final StringValueObjectFactory<T> factory, final String str) {
577 return factory.newInstance(str.substring(0, str.lastIndexOf('/')));
580 private static <T> @NonNull Entry<T, Integer> splitPrefix(final StringValueObjectFactory<T> factory,
582 final int slash = str.lastIndexOf('/');
583 return new SimpleImmutableEntry<>(factory.newInstance(str.substring(0, slash)),
584 Integer.valueOf(str.substring(slash + 1)));
587 public final byte @NonNull[] ipv6PrefixToBytes(final @NonNull P6 prefix) {
588 final String str = ipv6PrefixString(prefix);
589 final byte[] bytes = new byte[Ipv6Utils.INET6_LENGTH + 1];
590 final int slash = str.lastIndexOf('/');
591 Ipv6Utils.fillIpv6Bytes(bytes, str, slash);
592 bytes[Ipv6Utils.INET6_LENGTH] = (byte)Integer.parseInt(str.substring(slash + 1), 10);
596 private static @NonNull String addressStringV4(final InetAddress addr) {
597 requireAddress(addr);
598 checkArgument(addr instanceof Inet4Address, "Address has to be an Inet4Address");
599 return addr.getHostAddress();
602 private static String addressStringV6(final byte @NonNull[] bytes) {
603 checkArgument(bytes.length == Ipv6Utils.INET6_LENGTH, "IPv6 address length is 16 bytes");
606 return addressStringV6(Inet6Address.getByAddress(null, bytes, null));
607 } catch (UnknownHostException e) {
608 throw new IllegalArgumentException(String.format("Invalid input %s", bytes), e);
612 private static String addressStringV6(final InetAddress addr) {
613 requireAddress(addr);
614 checkArgument(addr instanceof Inet6Address, "Address has to be an Inet6Address");
615 return addressStringV6((Inet6Address) addr);
618 private static String addressStringV6(final Inet6Address addr) {
619 return InetAddresses.toAddrString(addr);
622 private static String prefixStringV4(final byte @NonNull[] bytes) {
623 final StringBuilder sb = new StringBuilder(18);
624 Ipv4Utils.appendIpv4String(sb, bytes);
625 return sb.append("/32").toString();
628 private static String prefixStringV4(final byte @NonNull[] bytes, final int mask) {
629 checkArgument(mask >= 0 && mask <= 32, "Invalid mask %s", mask);
631 final StringBuilder sb = new StringBuilder(18);
632 Ipv4Utils.appendIpv4String(sb, bytes);
633 return sb.append('/').append(mask).toString();
636 private P4 v4PrefixForShort(final byte @NonNull[] array, final int startOffset, final int size, final int mask) {
637 if (startOffset == 0 && size == Ipv4Utils.INET4_LENGTH && array.length == Ipv4Utils.INET4_LENGTH) {
638 // Easy case, fall back to non-short
639 return ipv4PrefixFor(array, mask);
642 final StringBuilder sb = new StringBuilder(18);
645 sb.append(Byte.toUnsignedInt(array[startOffset]));
646 for (int i = 1; i < size; i++) {
647 sb.append('.').append(Byte.toUnsignedInt(array[startOffset + i]));
651 for (int i = size; i < Ipv4Utils.INET4_LENGTH; i++) {
656 checkArgument(mask > 0 && mask <= 32, "Invalid mask %s", mask);
657 sb.append('/').append(mask);
659 return prefix4Factory.newInstance(sb.toString());
662 private @NonNull A6 coerceIpv6Address(final @NonNull A addr) {
663 final A6 ret = maybeIpv6Address(addr);
664 checkArgument(ret != null, "Address %s is neither IPv4 nor IPv6", addr);
668 private @NonNull A6NZ coerceIpv6AddressNoZone(final @NonNull ANZ addr) {
669 final A6NZ ret = maybeIpv6AddressNoZone(addr);
670 checkArgument(ret != null, "Address %s is neither IPv4 nor IPv6", addr);