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 java.net.Inet4Address;
14 import java.net.Inet6Address;
15 import java.net.InetAddress;
16 import java.net.UnknownHostException;
17 import java.util.AbstractMap.SimpleImmutableEntry;
18 import java.util.Map.Entry;
19 import javax.annotation.Nonnull;
20 import org.opendaylight.yangtools.yang.binding.util.StringValueObjectFactory;
23 * A set of utility methods to efficiently instantiate various ietf-inet-types DTOs.
26 public abstract class AbstractIetfInetUtil<A4, P4, A6, P6, A> {
27 private static final int INET4_LENGTH = 4;
28 private static final int INET6_LENGTH = 16;
29 private final StringValueObjectFactory<A4> address4Factory;
30 private final StringValueObjectFactory<P4> prefix4Factory;
31 private final StringValueObjectFactory<A6> address6Factory;
32 private final StringValueObjectFactory<P6> prefix6Factory;
34 protected AbstractIetfInetUtil(final Class<A4> addr4Class, final Class<P4> prefix4Class,
35 final Class<A6> addr6Class, final Class<P6> prefix6Class) {
36 this.address4Factory = StringValueObjectFactory.create(addr4Class, "0.0.0.0");
37 this.prefix4Factory = StringValueObjectFactory.create(prefix4Class, "0.0.0.0/0");
38 this.address6Factory = StringValueObjectFactory.create(addr6Class, "::0");
39 this.prefix6Factory = StringValueObjectFactory.create(prefix6Class, "::0/0");
42 protected abstract A ipv4Address(A4 addr);
43 protected abstract A ipv6Address(A6 addr);
44 protected abstract String ipv4AddressString(A4 addr);
45 protected abstract String ipv6AddressString(A6 addr);
46 protected abstract String ipv4PrefixString(P4 prefix);
47 protected abstract String ipv6PrefixString(P6 prefix);
49 @Nonnull public final A ipAddressFor(@Nonnull final byte[] bytes) {
50 switch (bytes.length) {
52 return ipv4Address(ipv4AddressFor(bytes));
54 return ipv6Address(ipv6AddressFor(bytes));
56 throw new IllegalArgumentException("Invalid array length " + bytes.length);
60 @Nonnull public final A ipAddressFor(@Nonnull final InetAddress addr) {
61 Preconditions.checkNotNull(addr, "Address must not be null");
62 if (addr instanceof Inet4Address) {
63 return ipv4Address(ipv4AddressFor(addr));
64 } else if (addr instanceof Inet6Address) {
65 return ipv6Address(ipv6AddressFor(addr));
67 throw new IllegalArgumentException("Unhandled address " + addr);
72 * Create an Ipv4Address by interpreting input bytes as an IPv4 address.
74 * @param bytes 4-byte array
75 * @return An Ipv4Address object
76 * @throws IllegalArgumentException if bytes has length different from 4
77 * @throws NullPointerException if bytes is null
79 @Nonnull public final A4 ipv4AddressFor(@Nonnull final byte[] bytes) {
80 return address4Factory.newInstance(addressStringV4(bytes));
84 * Create an Ipv4Address by interpreting an {@link Inet4Address}.
86 * @param addr An {@link Inet4Address}
87 * @return An Ipv4Address object
88 * @throws IllegalArgumentException if addr is not an {@link Inet4Address}
89 * @throws NullPointerException if addr is null
91 @Nonnull public final A4 ipv4AddressFor(@Nonnull final InetAddress addr) {
92 Preconditions.checkNotNull(addr, "Address must not be null");
93 Preconditions.checkArgument(addr instanceof Inet4Address, "Address has to be an Inet4Address");
94 return address4Factory.newInstance(addr.getHostAddress());
97 @Nonnull public final A4 ipv4AddressFrom(@Nonnull final P4 prefix) {
98 return prefixToAddress(address4Factory, ipv4PrefixString(prefix));
101 @Nonnull public final byte[] ipv4AddressBytes(@Nonnull final A4 addr) {
103 * This implementation relies heavily on the input string having been validated to comply with
104 * the Ipv4Address pattern, which may include a zone index.
106 final String str = ipv4AddressString(addr);
107 final byte[] bytes = new byte[INET4_LENGTH];
108 final int percent = str.indexOf('%');
109 Ipv4Utils.fillIpv4Bytes(bytes, 0, str, 0, percent == -1 ? str.length() : percent);
114 * Create a /32 Ipv4Prefix by interpreting input bytes as an IPv4 address.
116 * @param bytes four-byte array
117 * @return An Ipv4Prefix object
118 * @throws IllegalArgumentException if bytes has length different from 4
119 * @throws NullPointerException if bytes is null
121 @Nonnull public final P4 ipv4PrefixFor(@Nonnull final byte[] bytes) {
122 return prefix4Factory.newInstance(prefixStringV4(bytes));
126 * Create a Ipv4Prefix by combining the address with a mask. The address
127 * bytes are interpreted as an address and the specified mask is concatenated to
128 * it. The address bytes are not masked, hence input <code>address = { 1, 2, 3, 4 }</code>
129 * and <code>mask=24</code> will result in <code>1.2.3.4/24</code>.
131 * @param address Input address as a 4-byte array
132 * @param mask Prefix mask
133 * @return An Ipv4Prefix object
134 * @throws IllegalArgumentException if bytes has length different from 4 or if mask is not in range 0-32
135 * @throws NullPointerException if bytes is null
137 @Nonnull public final P4 ipv4PrefixFor(@Nonnull final byte[] address, final int mask) {
138 return prefix4Factory.newInstance(prefixStringV4(address, mask));
141 @Nonnull public final P4 ipv4PrefixForShort(@Nonnull final byte[] address, final int mask) {
143 // Easy case, reuse the template
144 return prefix4Factory.getTemplate();
147 return v4PrefixForShort(address, 0, (mask / Byte.SIZE) + ((mask % Byte.SIZE == 0) ? 0 : 1), mask);
150 @Nonnull public final P4 ipv4PrefixForShort(@Nonnull final byte[] array, final int startOffset, final int mask) {
152 // Easy case, reuse the template
153 return prefix4Factory.getTemplate();
156 return v4PrefixForShort(array, startOffset, (mask / Byte.SIZE) + ((mask % Byte.SIZE == 0) ? 0 : 1), mask);
160 * Create a /32 Ipv4Prefix for an {@link Inet4Address}
162 * @param addr An {@link Inet4Address}
163 * @return An Ipv4Prefix object
164 * @throws IllegalArgumentException if addr is not an Inet4Address
165 * @throws NullPointerException if adds is null
167 @Nonnull public final P4 ipv4PrefixFor(@Nonnull final InetAddress addr) {
168 Preconditions.checkNotNull(addr, "Address must not be null");
169 Preconditions.checkArgument(addr instanceof Inet4Address, "Address has to be an Inet4Address");
170 return prefix4Factory.newInstance(addr.getHostAddress() + "/32");
174 * Create a Ipv4Prefix by combining the address with a mask. The address bytes are not masked.
176 * @param addr An {@link Inet4Address}
177 * @param mask Prefix mask
178 * @return An Ipv4Prefix object
179 * @throws IllegalArgumentException if addr is not an Inet4Address or if mask is not in range 0-32
180 * @throws NullPointerException if addr is null
182 @Nonnull public final P4 ipv4PrefixFor(@Nonnull final InetAddress addr, final int mask) {
183 Preconditions.checkNotNull(addr, "Address must not be null");
184 Preconditions.checkArgument(addr instanceof Inet4Address, "Address has to be an Inet4Address");
185 Preconditions.checkArgument(mask >= 0 && mask <= 32, "Invalid mask %s", mask);
186 return prefix4Factory.newInstance(addr.getHostAddress() + '/' + mask);
189 @Nonnull public final P4 ipv4PrefixFor(@Nonnull final A4 addr) {
190 Preconditions.checkNotNull(addr, "Address must not be null");
191 return prefix4Factory.newInstance(ipv4AddressString(addr) + "/32");
194 @Nonnull public final P4 ipv4PrefixFor(@Nonnull final A4 addr, final int mask) {
195 Preconditions.checkNotNull(addr, "Address must not be null");
196 Preconditions.checkArgument(mask >= 0 && mask <= 32, "Invalid mask %s", mask);
197 return prefix4Factory.newInstance(ipv4AddressString(addr) + '/' + mask);
200 @Nonnull public final Entry<A4, Integer> splitIpv4Prefix(@Nonnull final P4 prefix) {
201 return splitPrefix(address4Factory, ipv4PrefixString(prefix));
204 @Nonnull public final byte[] ipv4PrefixToBytes(@Nonnull final P4 prefix) {
205 final String str = ipv4PrefixString(prefix);
206 final int slash = str.lastIndexOf('/');
208 final byte[] bytes = new byte[INET4_LENGTH + 1];
209 Ipv4Utils.fillIpv4Bytes(bytes, 0, str, 0, slash);
210 bytes[INET4_LENGTH] = (byte)Integer.parseInt(str.substring(slash + 1), 10);
215 * Create an Ipv6Address by interpreting input bytes as an IPv6 address.
217 * @param bytes 16-byte array
218 * @return An Ipv6Address object
219 * @throws IllegalArgumentException if bytes has length different from 16
220 * @throws NullPointerException if bytes is null
222 @Nonnull public final A6 ipv6AddressFor(@Nonnull final byte[] bytes) {
223 return address6Factory.newInstance(addressStringV6(bytes));
227 * Create an Ipv6Address by interpreting an {@link Inet6Address}.
229 * @param addr An {@link Inet6Address}
230 * @return An Ipv6Address object
231 * @throws IllegalArgumentException if addr is not an {@link Inet6Address}
232 * @throws NullPointerException if addr is null
234 @Nonnull public final A6 ipv6AddressFor(@Nonnull final InetAddress addr) {
235 Preconditions.checkNotNull(addr, "Address must not be null");
236 Preconditions.checkArgument(addr instanceof Inet6Address, "Address has to be an Inet6Address");
237 return address6Factory.newInstance(addressStringV6(addr));
240 @Nonnull public final A6 ipv6AddressFrom(@Nonnull final P6 prefix) {
241 return prefixToAddress(address6Factory, ipv6PrefixString(prefix));
244 @Nonnull public final byte[] ipv6AddressBytes(@Nonnull final A6 addr) {
245 String str = ipv6AddressString(addr);
246 final int percent = str.indexOf('%');
248 str = str.substring(0, percent);
251 return InetAddresses.forString(str).getAddress();
255 * Create a /128 Ipv6Prefix by interpreting input bytes as an IPv6 address.
257 * @param bytes four-byte array
258 * @return An Ipv6Prefix object
259 * @throws IllegalArgumentException if bytes has length different from 16
260 * @throws NullPointerException if bytes is null
262 @Nonnull public final P6 ipv6PrefixFor(@Nonnull final byte[] bytes) {
263 return prefix6Factory.newInstance(addressStringV6(bytes) + "/128");
267 * Create a Ipv6Prefix by combining the address with a mask. The address
268 * bytes are interpreted as an address and the specified mask is concatenated to
269 * it. The address bytes are not masked.
271 * @param address Input address as a 4-byte array
272 * @param mask Prefix mask
273 * @return An Ipv6Prefix object
274 * @throws IllegalArgumentException if bytes has length different from 16 or if mask is not in range 0-128
275 * @throws NullPointerException if bytes is null
277 @Nonnull public final P6 ipv6PrefixFor(@Nonnull final byte[] address, final int mask) {
278 Preconditions.checkArgument(mask >= 0 && mask <= 128, "Invalid mask %s", mask);
279 return prefix6Factory.newInstance(addressStringV6(address) + '/' + mask);
282 @Nonnull public final P6 ipv6PrefixForShort(@Nonnull final byte[] address, final int mask) {
283 return ipv6PrefixForShort(address, 0, mask);
286 @Nonnull public final P6 ipv6PrefixForShort(@Nonnull final byte[] array, final int startOffset, final int mask) {
288 // Easy case, reuse the template
289 return prefix6Factory.getTemplate();
292 Preconditions.checkArgument(mask > 0 && mask <= 128, "Invalid mask %s", mask);
293 final int size = (mask / Byte.SIZE) + ((mask % Byte.SIZE == 0) ? 0 : 1);
295 // Until we can instantiate an IPv6 address for a partial array, use a temporary buffer
296 byte[] tmp = new byte[INET6_LENGTH];
297 System.arraycopy(array, startOffset, tmp, 0, size);
298 return ipv6PrefixFor(tmp, mask);
302 * Create a /128 Ipv6Prefix by interpreting input bytes as an IPv4 address.
304 * @param addr an {@link Inet6Address}
305 * @return An Ipv6Prefix object
306 * @throws IllegalArgumentException if addr is not an Inet6Address or if mask is not in range 0-128
307 * @throws NullPointerException if addr is null
309 @Nonnull public final P6 ipv6PrefixFor(@Nonnull final InetAddress addr) {
310 return prefix6Factory.newInstance(addressStringV6(addr) + "/128");
314 * Create a Ipv6Prefix by combining the address with a mask. The address
315 * bytes are interpreted as an address and the specified mask is concatenated to
316 * it. The address bytes are not masked.
318 * @param addr Input address
319 * @param mask Prefix mask
320 * @return An Ipv6Prefix object
321 * @throws IllegalArgumentException if addr is not an Inet6Address or if mask is not in range 0-128
322 * @throws NullPointerException if addr is null
324 @Nonnull public final P6 ipv6PrefixFor(@Nonnull final InetAddress addr, final int mask) {
325 Preconditions.checkNotNull(addr, "Address must not be null");
326 Preconditions.checkArgument(addr instanceof Inet6Address, "Address has to be an Inet6Address");
327 Preconditions.checkArgument(mask >= 0 && mask <= 128, "Invalid mask %s", mask);
328 return prefix6Factory.newInstance(addressStringV6(addr) + '/' + mask);
331 @Nonnull public final P6 ipv6PrefixFor(@Nonnull final A6 addr) {
332 Preconditions.checkNotNull(addr, "Address must not be null");
333 return prefix6Factory.newInstance(ipv6AddressString(addr) + "/128");
336 @Nonnull public final P6 ipv6PrefixFor(@Nonnull final A6 addr, final int mask) {
337 Preconditions.checkNotNull(addr, "Address must not be null");
338 Preconditions.checkArgument(mask >= 0 && mask <= 128, "Invalid mask %s", mask);
339 return prefix6Factory.newInstance(ipv6AddressString(addr) + '/' + mask);
342 @Nonnull public final Entry<A6, Integer> splitIpv6Prefix(@Nonnull final P6 prefix) {
343 return splitPrefix(address6Factory, ipv6PrefixString(prefix));
346 private static <T> T prefixToAddress(final StringValueObjectFactory<T> factory, final String str) {
347 return factory.newInstance(str.substring(0, str.lastIndexOf('/')));
350 private static <T> Entry<T, Integer> splitPrefix(final StringValueObjectFactory<T> factory, final String str) {
351 final int slash = str.lastIndexOf('/');
352 return new SimpleImmutableEntry<>(factory.newInstance(str.substring(0, slash)),
353 Integer.valueOf(str.substring(slash + 1)));
356 @Nonnull public final byte[] ipv6PrefixToBytes(@Nonnull final P6 prefix) {
357 final String str = ipv6PrefixString(prefix);
358 final int slash = str.lastIndexOf('/');
360 final byte[] bytes = new byte[INET6_LENGTH + 1];
361 System.arraycopy(InetAddresses.forString(str.substring(0, slash)).getAddress(), 0, bytes, 0, INET6_LENGTH);
362 bytes[INET6_LENGTH] = (byte)Integer.parseInt(str.substring(slash + 1), 10);
366 private static void appendIpv4String(final StringBuilder sb, final byte[] bytes) {
367 Preconditions.checkArgument(bytes.length == INET4_LENGTH, "IPv4 address length is 4 bytes");
369 sb.append(Byte.toUnsignedInt(bytes[0]));
370 for (int i = 1; i < INET4_LENGTH; ++i) {
372 sb.append(Byte.toUnsignedInt(bytes[i]));
376 private static String addressStringV4(final byte[] bytes) {
377 final StringBuilder sb = new StringBuilder(15);
378 appendIpv4String(sb, bytes);
379 return sb.toString();
382 private static String addressStringV6(final byte[] bytes) {
383 Preconditions.checkArgument(bytes.length == INET6_LENGTH, "IPv6 address length is 16 bytes");
386 return addressStringV6(Inet6Address.getByAddress(bytes));
387 } catch (UnknownHostException e) {
388 throw new IllegalArgumentException(String.format("Invalid input %s", bytes), e);
392 private static String addressStringV6(final InetAddress addr) {
393 return InetAddresses.toAddrString(addr);
396 private static String prefixStringV4(final byte[] bytes) {
397 final StringBuilder sb = new StringBuilder(18);
398 appendIpv4String(sb, bytes);
400 return sb.toString();
403 private static String prefixStringV4(final byte[] bytes, final int mask) {
404 Preconditions.checkArgument(mask >= 0 && mask <= 32, "Invalid mask %s", mask);
406 final StringBuilder sb = new StringBuilder(18);
407 appendIpv4String(sb, bytes);
410 return sb.toString();
413 private P4 v4PrefixForShort(@Nonnull final byte[] array, final int startOffset, final int size, final int mask) {
414 if (startOffset == 0 && size == INET4_LENGTH && array.length == INET4_LENGTH) {
415 // Easy case, fall back to non-short
416 return ipv4PrefixFor(array, mask);
419 final StringBuilder sb = new StringBuilder(18);
422 sb.append(Byte.toUnsignedInt(array[startOffset]));
423 for (int i = 1; i < size; i++) {
425 sb.append(Byte.toUnsignedInt(array[startOffset + i]));
429 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());