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 fillIpv4Bytes(bytes, str, 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));
143 * Create a /32 Ipv4Prefix for an {@link Inet4Address}
145 * @param addr An {@link Inet4Address}
146 * @return An Ipv4Prefix object
147 * @throws IllegalArgumentException if addr is not an Inet4Address
148 * @throws NullPointerException if adds is null
150 @Nonnull public final P4 ipv4PrefixFor(@Nonnull final InetAddress addr) {
151 Preconditions.checkNotNull(addr, "Address must not be null");
152 Preconditions.checkArgument(addr instanceof Inet4Address, "Address has to be an Inet4Address");
153 return prefix4Factory.newInstance(addr.getHostAddress() + "/32");
157 * Create a Ipv4Prefix by combining the address with a mask. The address bytes are not masked.
159 * @param addr An {@link Inet4Address}
160 * @param mask Prefix mask
161 * @return An Ipv4Prefix object
162 * @throws IllegalArgumentException if addr is not an Inet4Address or if mask is not in range 0-32
163 * @throws NullPointerException if addr is null
165 @Nonnull public final P4 ipv4PrefixFor(@Nonnull final InetAddress addr, final int mask) {
166 Preconditions.checkNotNull(addr, "Address must not be null");
167 Preconditions.checkArgument(addr instanceof Inet4Address, "Address has to be an Inet4Address");
168 Preconditions.checkArgument(mask >= 0 && mask <= 32, "Invalid mask %s", mask);
169 return prefix4Factory.newInstance(addr.getHostAddress() + '/' + mask);
172 @Nonnull public final P4 ipv4PrefixFor(@Nonnull final A4 addr) {
173 Preconditions.checkNotNull(addr, "Address must not be null");
174 return prefix4Factory.newInstance(ipv4AddressString(addr) + "/32");
177 @Nonnull public final P4 ipv4PrefixFor(@Nonnull final A4 addr, final int mask) {
178 Preconditions.checkNotNull(addr, "Address must not be null");
179 Preconditions.checkArgument(mask >= 0 && mask <= 32, "Invalid mask %s", mask);
180 return prefix4Factory.newInstance(ipv4AddressString(addr) + '/' + mask);
183 @Nonnull public final Entry<A4, Integer> splitIpv4Prefix(@Nonnull final P4 prefix) {
184 return splitPrefix(address4Factory, ipv4PrefixString(prefix));
187 @Nonnull public final byte[] ipv4PrefixToBytes(@Nonnull final P4 prefix) {
188 final String str = ipv4PrefixString(prefix);
189 final int slash = str.lastIndexOf('/');
191 final byte[] bytes = new byte[INET4_LENGTH + 1];
192 fillIpv4Bytes(bytes, str, slash);
193 bytes[INET4_LENGTH] = (byte)Integer.parseInt(str.substring(slash + 1), 10);
197 private static void fillIpv4Bytes(final byte[] bytes, final String str, final int limit) {
200 for (int i = 0; i < limit; ++i) {
201 final char c = str.charAt(i);
203 bytes[out++] = (byte) val;
206 val = 10 * val + (c - '0');
210 bytes[out] = (byte) val;
214 * Create an Ipv6Address by interpreting input bytes as an IPv6 address.
216 * @param bytes 16-byte array
217 * @return An Ipv6Address object
218 * @throws IllegalArgumentException if bytes has length different from 16
219 * @throws NullPointerException if bytes is null
221 @Nonnull public final A6 ipv6AddressFor(@Nonnull final byte[] bytes) {
222 return address6Factory.newInstance(addressStringV6(bytes));
226 * Create an Ipv6Address by interpreting an {@link Inet6Address}.
228 * @param addr An {@link Inet6Address}
229 * @return An Ipv6Address object
230 * @throws IllegalArgumentException if addr is not an {@link Inet6Address}
231 * @throws NullPointerException if addr is null
233 @Nonnull public final A6 ipv6AddressFor(@Nonnull final InetAddress addr) {
234 Preconditions.checkNotNull(addr, "Address must not be null");
235 Preconditions.checkArgument(addr instanceof Inet6Address, "Address has to be an Inet6Address");
236 return address6Factory.newInstance(addressStringV6(addr));
239 @Nonnull public final A6 ipv6AddressFrom(@Nonnull final P6 prefix) {
240 return prefixToAddress(address6Factory, ipv6PrefixString(prefix));
243 @Nonnull public final byte[] ipv6AddressBytes(@Nonnull final A6 addr) {
244 String str = ipv6AddressString(addr);
245 final int percent = str.indexOf('%');
247 str = str.substring(0, percent);
250 return InetAddresses.forString(str).getAddress();
254 * Create a /128 Ipv6Prefix by interpreting input bytes as an IPv6 address.
256 * @param bytes four-byte array
257 * @return An Ipv6Prefix object
258 * @throws IllegalArgumentException if bytes has length different from 16
259 * @throws NullPointerException if bytes is null
261 @Nonnull public final P6 ipv6PrefixFor(@Nonnull final byte[] bytes) {
262 return prefix6Factory.newInstance(addressStringV6(bytes) + "/128");
266 * Create a Ipv6Prefix by combining the address with a mask. The address
267 * bytes are interpreted as an address and the specified mask is concatenated to
268 * it. The address bytes are not masked.
270 * @param address Input address as a 4-byte array
271 * @param mask Prefix mask
272 * @return An Ipv6Prefix object
273 * @throws IllegalArgumentException if bytes has length different from 16 or if mask is not in range 0-128
274 * @throws NullPointerException if bytes is null
276 @Nonnull public final P6 ipv6PrefixFor(@Nonnull final byte[] address, final int mask) {
277 Preconditions.checkArgument(mask >= 0 && mask <= 128, "Invalid mask %s", mask);
278 return prefix6Factory.newInstance(addressStringV6(address) + '/' + mask);
282 * Create a /128 Ipv6Prefix by interpreting input bytes as an IPv4 address.
284 * @param addr an {@link Inet6Address}
285 * @return An Ipv6Prefix object
286 * @throws IllegalArgumentException if addr is not an Inet6Address or if mask is not in range 0-128
287 * @throws NullPointerException if addr is null
289 @Nonnull public final P6 ipv6PrefixFor(@Nonnull final InetAddress addr) {
290 return prefix6Factory.newInstance(addressStringV6(addr) + "/128");
294 * Create a Ipv6Prefix by combining the address with a mask. The address
295 * bytes are interpreted as an address and the specified mask is concatenated to
296 * it. The address bytes are not masked.
298 * @param addr Input address
299 * @param mask Prefix mask
300 * @return An Ipv6Prefix object
301 * @throws IllegalArgumentException if addr is not an Inet6Address or if mask is not in range 0-128
302 * @throws NullPointerException if addr is null
304 @Nonnull public final P6 ipv6PrefixFor(@Nonnull final InetAddress addr, final int mask) {
305 Preconditions.checkNotNull(addr, "Address must not be null");
306 Preconditions.checkArgument(addr instanceof Inet6Address, "Address has to be an Inet6Address");
307 Preconditions.checkArgument(mask >= 0 && mask <= 128, "Invalid mask %s", mask);
308 return prefix6Factory.newInstance(addressStringV6(addr) + '/' + mask);
311 @Nonnull public final P6 ipv6PrefixFor(@Nonnull final A6 addr) {
312 Preconditions.checkNotNull(addr, "Address must not be null");
313 return prefix6Factory.newInstance(ipv6AddressString(addr) + "/128");
316 @Nonnull public final P6 ipv6PrefixFor(@Nonnull final A6 addr, final int mask) {
317 Preconditions.checkNotNull(addr, "Address must not be null");
318 Preconditions.checkArgument(mask >= 0 && mask <= 128, "Invalid mask %s", mask);
319 return prefix6Factory.newInstance(ipv6AddressString(addr) + '/' + mask);
322 @Nonnull public final Entry<A6, Integer> splitIpv6Prefix(@Nonnull final P6 prefix) {
323 return splitPrefix(address6Factory, ipv6PrefixString(prefix));
326 private static <T> T prefixToAddress(final StringValueObjectFactory<T> factory, final String str) {
327 return factory.newInstance(str.substring(0, str.lastIndexOf('/')));
330 private static <T> Entry<T, Integer> splitPrefix(final StringValueObjectFactory<T> factory, final String str) {
331 final int slash = str.lastIndexOf('/');
332 return new SimpleImmutableEntry<>(factory.newInstance(str.substring(0, slash)),
333 Integer.valueOf(str.substring(slash + 1)));
336 @Nonnull public final byte[] ipv6PrefixToBytes(@Nonnull final P6 prefix) {
337 final String str = ipv6PrefixString(prefix);
338 final int slash = str.lastIndexOf('/');
340 final byte[] bytes = new byte[INET6_LENGTH + 1];
341 System.arraycopy(InetAddresses.forString(str.substring(0, slash)).getAddress(), 0, bytes, 0, INET6_LENGTH);
342 bytes[INET6_LENGTH] = (byte)Integer.parseInt(str.substring(slash + 1), 10);
346 private static void appendIpv4String(final StringBuilder sb, final byte[] bytes) {
347 Preconditions.checkArgument(bytes.length == INET4_LENGTH, "IPv4 address length is 4 bytes");
349 sb.append(UnsignedBytes.toInt(bytes[0]));
350 for (int i = 1; i < INET4_LENGTH; ++i) {
352 sb.append(UnsignedBytes.toInt(bytes[i]));
356 private static String addressStringV4(final byte[] bytes) {
357 final StringBuilder sb = new StringBuilder(15);
358 appendIpv4String(sb, bytes);
359 return sb.toString();
362 private static String addressStringV6(final byte[] bytes) {
363 Preconditions.checkArgument(bytes.length == INET6_LENGTH, "IPv6 address length is 16 bytes");
366 return addressStringV6(Inet6Address.getByAddress(bytes));
367 } catch (UnknownHostException e) {
368 throw new IllegalArgumentException(String.format("Invalid input %s", bytes), e);
372 private static String addressStringV6(final InetAddress addr) {
373 return InetAddresses.toAddrString(addr);
376 private static String prefixStringV4(final byte[] bytes) {
377 final StringBuilder sb = new StringBuilder(18);
378 appendIpv4String(sb, bytes);
380 return sb.toString();
383 private static String prefixStringV4(final byte[] bytes, final int mask) {
384 Preconditions.checkArgument(mask >= 0 && mask <= 32, "Invalid mask %s", mask);
386 final StringBuilder sb = new StringBuilder(18);
387 appendIpv4String(sb, bytes);
390 return sb.toString();