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 com.google.common.annotations.Beta;
11 import com.google.common.base.Preconditions;
12 import com.google.common.net.InetAddresses;
13 import com.google.common.primitives.UnsignedBytes;
14 import java.net.Inet4Address;
15 import java.net.Inet6Address;
16 import java.net.InetAddress;
17 import java.net.UnknownHostException;
18 import java.util.AbstractMap.SimpleImmutableEntry;
19 import java.util.Map.Entry;
20 import javax.annotation.Nonnull;
21 import org.opendaylight.yangtools.yang.binding.util.StringValueObjectFactory;
24 * A set of utility methods to efficiently instantiate various ietf-inet-types DTOs.
27 public abstract class AbstractIetfInetUtil<A4, P4, A6, P6, A> {
28 private static final int INET4_LENGTH = 4;
29 private static final int INET6_LENGTH = 16;
30 private final StringValueObjectFactory<A4> address4Factory;
31 private final StringValueObjectFactory<P4> prefix4Factory;
32 private final StringValueObjectFactory<A6> address6Factory;
33 private final StringValueObjectFactory<P6> prefix6Factory;
35 protected AbstractIetfInetUtil(final Class<A4> addr4Class, final Class<P4> prefix4Class,
36 final Class<A6> addr6Class, final Class<P6> prefix6Class) {
37 this.address4Factory = StringValueObjectFactory.create(addr4Class, "0.0.0.0");
38 this.prefix4Factory = StringValueObjectFactory.create(prefix4Class, "0.0.0.0/0");
39 this.address6Factory = StringValueObjectFactory.create(addr6Class, "::0");
40 this.prefix6Factory = StringValueObjectFactory.create(prefix6Class, "::0/0");
43 protected abstract A ipv4Address(A4 addr);
44 protected abstract A ipv6Address(A6 addr);
45 protected abstract String ipv4AddressString(A4 addr);
46 protected abstract String ipv6AddressString(A6 addr);
47 protected abstract String ipv4PrefixString(P4 prefix);
48 protected abstract String ipv6PrefixString(P6 prefix);
50 @Nonnull public final A ipAddressFor(@Nonnull final byte[] bytes) {
51 switch (bytes.length) {
53 return ipv4Address(ipv4AddressFor(bytes));
55 return ipv6Address(ipv6AddressFor(bytes));
57 throw new IllegalArgumentException("Invalid array length " + bytes.length);
61 @Nonnull public final A ipAddressFor(@Nonnull final InetAddress addr) {
62 Preconditions.checkNotNull(addr, "Address must not be null");
63 if (addr instanceof Inet4Address) {
64 return ipv4Address(ipv4AddressFor(addr));
65 } else if (addr instanceof Inet6Address) {
66 return ipv6Address(ipv6AddressFor(addr));
68 throw new IllegalArgumentException("Unhandled address " + addr);
73 * Create an Ipv4Address by interpreting input bytes as an IPv4 address.
75 * @param bytes 4-byte array
76 * @return An Ipv4Address object
77 * @throws IllegalArgumentException if bytes has length different from 4
78 * @throws NullPointerException if bytes is null
80 @Nonnull public final A4 ipv4AddressFor(@Nonnull final byte[] bytes) {
81 return address4Factory.newInstance(addressStringV4(bytes));
85 * Create an Ipv4Address by interpreting an {@link Inet4Address}.
87 * @param addr An {@link Inet4Address}
88 * @return An Ipv4Address object
89 * @throws IllegalArgumentException if addr is not an {@link Inet4Address}
90 * @throws NullPointerException if addr is null
92 @Nonnull public final A4 ipv4AddressFor(@Nonnull final InetAddress addr) {
93 Preconditions.checkNotNull(addr, "Address must not be null");
94 Preconditions.checkArgument(addr instanceof Inet4Address, "Address has to be an Inet4Address");
95 return address4Factory.newInstance(addr.getHostAddress());
98 @Nonnull public final A4 ipv4AddressFrom(@Nonnull final P4 prefix) {
99 return prefixToAddress(address4Factory, ipv4PrefixString(prefix));
102 @Nonnull public final byte[] ipv4AddressBytes(@Nonnull final A4 addr) {
104 * This implementation relies heavily on the input string having been validated to comply with
105 * the Ipv4Address pattern, which may include a zone index.
107 final String str = ipv4AddressString(addr);
108 final byte[] bytes = new byte[INET4_LENGTH];
109 final int percent = str.indexOf('%');
110 Ipv4Utils.fillIpv4Bytes(bytes, 0, str, 0, percent == -1 ? str.length() : percent);
115 * Create a /32 Ipv4Prefix by interpreting input bytes as an IPv4 address.
117 * @param bytes four-byte array
118 * @return An Ipv4Prefix object
119 * @throws IllegalArgumentException if bytes has length different from 4
120 * @throws NullPointerException if bytes is null
122 @Nonnull public final P4 ipv4PrefixFor(@Nonnull final byte[] bytes) {
123 return prefix4Factory.newInstance(prefixStringV4(bytes));
127 * Create a Ipv4Prefix by combining the address with a mask. The address
128 * bytes are interpreted as an address and the specified mask is concatenated to
129 * it. The address bytes are not masked, hence input <code>address = { 1, 2, 3, 4 }</code>
130 * and <code>mask=24</code> will result in <code>1.2.3.4/24</code>.
132 * @param address Input address as a 4-byte array
133 * @param mask Prefix mask
134 * @return An Ipv4Prefix object
135 * @throws IllegalArgumentException if bytes has length different from 4 or if mask is not in range 0-32
136 * @throws NullPointerException if bytes is null
138 @Nonnull public final P4 ipv4PrefixFor(@Nonnull final byte[] address, final int mask) {
139 return prefix4Factory.newInstance(prefixStringV4(address, mask));
142 @Nonnull public final P4 ipv4PrefixForShort(@Nonnull final byte[] address, final int mask) {
144 // Easy case, reuse the template
145 return prefix4Factory.getTemplate();
148 return v4PrefixForShort(address, 0, (mask / Byte.SIZE) + ((mask % Byte.SIZE == 0) ? 0 : 1), mask);
151 @Nonnull public final P4 ipv4PrefixForShort(@Nonnull final byte[] array, final int startOffset, final int mask) {
153 // Easy case, reuse the template
154 return prefix4Factory.getTemplate();
157 return v4PrefixForShort(array, startOffset, (mask / Byte.SIZE) + ((mask % Byte.SIZE == 0) ? 0 : 1), mask);
161 * Create a /32 Ipv4Prefix for an {@link Inet4Address}
163 * @param addr An {@link Inet4Address}
164 * @return An Ipv4Prefix object
165 * @throws IllegalArgumentException if addr is not an Inet4Address
166 * @throws NullPointerException if adds is null
168 @Nonnull public final P4 ipv4PrefixFor(@Nonnull final InetAddress addr) {
169 Preconditions.checkNotNull(addr, "Address must not be null");
170 Preconditions.checkArgument(addr instanceof Inet4Address, "Address has to be an Inet4Address");
171 return prefix4Factory.newInstance(addr.getHostAddress() + "/32");
175 * Create a Ipv4Prefix by combining the address with a mask. The address bytes are not masked.
177 * @param addr An {@link Inet4Address}
178 * @param mask Prefix mask
179 * @return An Ipv4Prefix object
180 * @throws IllegalArgumentException if addr is not an Inet4Address or if mask is not in range 0-32
181 * @throws NullPointerException if addr is null
183 @Nonnull public final P4 ipv4PrefixFor(@Nonnull final InetAddress addr, final int mask) {
184 Preconditions.checkNotNull(addr, "Address must not be null");
185 Preconditions.checkArgument(addr instanceof Inet4Address, "Address has to be an Inet4Address");
186 Preconditions.checkArgument(mask >= 0 && mask <= 32, "Invalid mask %s", mask);
187 return prefix4Factory.newInstance(addr.getHostAddress() + '/' + mask);
190 @Nonnull public final P4 ipv4PrefixFor(@Nonnull final A4 addr) {
191 Preconditions.checkNotNull(addr, "Address must not be null");
192 return prefix4Factory.newInstance(ipv4AddressString(addr) + "/32");
195 @Nonnull public final P4 ipv4PrefixFor(@Nonnull final A4 addr, final int mask) {
196 Preconditions.checkNotNull(addr, "Address must not be null");
197 Preconditions.checkArgument(mask >= 0 && mask <= 32, "Invalid mask %s", mask);
198 return prefix4Factory.newInstance(ipv4AddressString(addr) + '/' + mask);
201 @Nonnull public final Entry<A4, Integer> splitIpv4Prefix(@Nonnull final P4 prefix) {
202 return splitPrefix(address4Factory, ipv4PrefixString(prefix));
205 @Nonnull public final byte[] ipv4PrefixToBytes(@Nonnull final P4 prefix) {
206 final String str = ipv4PrefixString(prefix);
207 final int slash = str.lastIndexOf('/');
209 final byte[] bytes = new byte[INET4_LENGTH + 1];
210 Ipv4Utils.fillIpv4Bytes(bytes, 0, str, 0, slash);
211 bytes[INET4_LENGTH] = (byte)Integer.parseInt(str.substring(slash + 1), 10);
216 * Create an Ipv6Address by interpreting input bytes as an IPv6 address.
218 * @param bytes 16-byte array
219 * @return An Ipv6Address object
220 * @throws IllegalArgumentException if bytes has length different from 16
221 * @throws NullPointerException if bytes is null
223 @Nonnull public final A6 ipv6AddressFor(@Nonnull final byte[] bytes) {
224 return address6Factory.newInstance(addressStringV6(bytes));
228 * Create an Ipv6Address by interpreting an {@link Inet6Address}.
230 * @param addr An {@link Inet6Address}
231 * @return An Ipv6Address object
232 * @throws IllegalArgumentException if addr is not an {@link Inet6Address}
233 * @throws NullPointerException if addr is null
235 @Nonnull public final A6 ipv6AddressFor(@Nonnull final InetAddress addr) {
236 Preconditions.checkNotNull(addr, "Address must not be null");
237 Preconditions.checkArgument(addr instanceof Inet6Address, "Address has to be an Inet6Address");
238 return address6Factory.newInstance(addressStringV6(addr));
241 @Nonnull public final A6 ipv6AddressFrom(@Nonnull final P6 prefix) {
242 return prefixToAddress(address6Factory, ipv6PrefixString(prefix));
245 @Nonnull public final byte[] ipv6AddressBytes(@Nonnull final A6 addr) {
246 String str = ipv6AddressString(addr);
247 final int percent = str.indexOf('%');
249 str = str.substring(0, percent);
252 return InetAddresses.forString(str).getAddress();
256 * Create a /128 Ipv6Prefix by interpreting input bytes as an IPv6 address.
258 * @param bytes four-byte array
259 * @return An Ipv6Prefix object
260 * @throws IllegalArgumentException if bytes has length different from 16
261 * @throws NullPointerException if bytes is null
263 @Nonnull public final P6 ipv6PrefixFor(@Nonnull final byte[] bytes) {
264 return prefix6Factory.newInstance(addressStringV6(bytes) + "/128");
268 * Create a Ipv6Prefix by combining the address with a mask. The address
269 * bytes are interpreted as an address and the specified mask is concatenated to
270 * it. The address bytes are not masked.
272 * @param address Input address as a 4-byte array
273 * @param mask Prefix mask
274 * @return An Ipv6Prefix object
275 * @throws IllegalArgumentException if bytes has length different from 16 or if mask is not in range 0-128
276 * @throws NullPointerException if bytes is null
278 @Nonnull public final P6 ipv6PrefixFor(@Nonnull final byte[] address, final int mask) {
279 Preconditions.checkArgument(mask >= 0 && mask <= 128, "Invalid mask %s", mask);
280 return prefix6Factory.newInstance(addressStringV6(address) + '/' + mask);
283 @Nonnull public final P6 ipv6PrefixForShort(@Nonnull final byte[] address, final int mask) {
284 return ipv6PrefixForShort(address, 0, mask);
287 @Nonnull public final P6 ipv6PrefixForShort(@Nonnull final byte[] array, final int startOffset, final int mask) {
289 // Easy case, reuse the template
290 return prefix6Factory.getTemplate();
293 Preconditions.checkArgument(mask > 0 && mask <= 128, "Invalid mask %s", mask);
294 final int size = (mask / Byte.SIZE) + ((mask % Byte.SIZE == 0) ? 0 : 1);
296 // Until we can instantiate an IPv6 address for a partial array, use a temporary buffer
297 byte[] tmp = new byte[INET6_LENGTH];
298 System.arraycopy(array, startOffset, tmp, 0, size);
299 return ipv6PrefixFor(tmp, mask);
303 * Create a /128 Ipv6Prefix by interpreting input bytes as an IPv4 address.
305 * @param addr an {@link Inet6Address}
306 * @return An Ipv6Prefix object
307 * @throws IllegalArgumentException if addr is not an Inet6Address or if mask is not in range 0-128
308 * @throws NullPointerException if addr is null
310 @Nonnull public final P6 ipv6PrefixFor(@Nonnull final InetAddress addr) {
311 return prefix6Factory.newInstance(addressStringV6(addr) + "/128");
315 * Create a Ipv6Prefix by combining the address with a mask. The address
316 * bytes are interpreted as an address and the specified mask is concatenated to
317 * it. The address bytes are not masked.
319 * @param addr Input address
320 * @param mask Prefix mask
321 * @return An Ipv6Prefix object
322 * @throws IllegalArgumentException if addr is not an Inet6Address or if mask is not in range 0-128
323 * @throws NullPointerException if addr is null
325 @Nonnull public final P6 ipv6PrefixFor(@Nonnull final InetAddress addr, final int mask) {
326 Preconditions.checkNotNull(addr, "Address must not be null");
327 Preconditions.checkArgument(addr instanceof Inet6Address, "Address has to be an Inet6Address");
328 Preconditions.checkArgument(mask >= 0 && mask <= 128, "Invalid mask %s", mask);
329 return prefix6Factory.newInstance(addressStringV6(addr) + '/' + mask);
332 @Nonnull public final P6 ipv6PrefixFor(@Nonnull final A6 addr) {
333 Preconditions.checkNotNull(addr, "Address must not be null");
334 return prefix6Factory.newInstance(ipv6AddressString(addr) + "/128");
337 @Nonnull public final P6 ipv6PrefixFor(@Nonnull final A6 addr, final int mask) {
338 Preconditions.checkNotNull(addr, "Address must not be null");
339 Preconditions.checkArgument(mask >= 0 && mask <= 128, "Invalid mask %s", mask);
340 return prefix6Factory.newInstance(ipv6AddressString(addr) + '/' + mask);
343 @Nonnull public final Entry<A6, Integer> splitIpv6Prefix(@Nonnull final P6 prefix) {
344 return splitPrefix(address6Factory, ipv6PrefixString(prefix));
347 private static <T> T prefixToAddress(final StringValueObjectFactory<T> factory, final String str) {
348 return factory.newInstance(str.substring(0, str.lastIndexOf('/')));
351 private static <T> Entry<T, Integer> splitPrefix(final StringValueObjectFactory<T> factory, final String str) {
352 final int slash = str.lastIndexOf('/');
353 return new SimpleImmutableEntry<>(factory.newInstance(str.substring(0, slash)),
354 Integer.valueOf(str.substring(slash + 1)));
357 @Nonnull public final byte[] ipv6PrefixToBytes(@Nonnull final P6 prefix) {
358 final String str = ipv6PrefixString(prefix);
359 final int slash = str.lastIndexOf('/');
361 final byte[] bytes = new byte[INET6_LENGTH + 1];
362 System.arraycopy(InetAddresses.forString(str.substring(0, slash)).getAddress(), 0, bytes, 0, INET6_LENGTH);
363 bytes[INET6_LENGTH] = (byte)Integer.parseInt(str.substring(slash + 1), 10);
367 private static void appendIpv4String(final StringBuilder sb, final byte[] bytes) {
368 Preconditions.checkArgument(bytes.length == INET4_LENGTH, "IPv4 address length is 4 bytes");
370 sb.append(UnsignedBytes.toInt(bytes[0]));
371 for (int i = 1; i < INET4_LENGTH; ++i) {
373 sb.append(UnsignedBytes.toInt(bytes[i]));
377 private static String addressStringV4(final byte[] bytes) {
378 final StringBuilder sb = new StringBuilder(15);
379 appendIpv4String(sb, bytes);
380 return sb.toString();
383 private static String addressStringV6(final byte[] bytes) {
384 Preconditions.checkArgument(bytes.length == INET6_LENGTH, "IPv6 address length is 16 bytes");
387 return addressStringV6(Inet6Address.getByAddress(bytes));
388 } catch (UnknownHostException e) {
389 throw new IllegalArgumentException(String.format("Invalid input %s", bytes), e);
393 private static String addressStringV6(final InetAddress addr) {
394 return InetAddresses.toAddrString(addr);
397 private static String prefixStringV4(final byte[] bytes) {
398 final StringBuilder sb = new StringBuilder(18);
399 appendIpv4String(sb, bytes);
401 return sb.toString();
404 private static String prefixStringV4(final byte[] bytes, final int mask) {
405 Preconditions.checkArgument(mask >= 0 && mask <= 32, "Invalid mask %s", mask);
407 final StringBuilder sb = new StringBuilder(18);
408 appendIpv4String(sb, bytes);
411 return sb.toString();
414 private P4 v4PrefixForShort(@Nonnull final byte[] array, final int startOffset, final int size, final int mask) {
415 if (startOffset == 0 && size == INET4_LENGTH && array.length == INET4_LENGTH) {
416 // Easy case, fall back to non-short
417 return ipv4PrefixFor(array, mask);
420 final StringBuilder sb = new StringBuilder(18);
423 sb.append(UnsignedBytes.toInt(array[startOffset]));
424 for (int i = 1; i < size; i++) {
426 sb.append(UnsignedBytes.toInt(array[startOffset + i]));
430 for (int i = size; i < INET4_LENGTH; i++) {
435 Preconditions.checkArgument(mask > 0 && mask <= 32, "Invalid mask %s", mask);
439 return prefix4Factory.newInstance(sb.toString());