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 final StringValueObjectFactory<A4> address4Factory;
29 private final StringValueObjectFactory<P4> prefix4Factory;
30 private final StringValueObjectFactory<A6> address6Factory;
31 private final StringValueObjectFactory<P6> prefix6Factory;
33 protected AbstractIetfInetUtil(final Class<A4> addr4Class, final Class<P4> prefix4Class,
34 final Class<A6> addr6Class, final Class<P6> prefix6Class) {
35 this.address4Factory = StringValueObjectFactory.create(addr4Class, "0.0.0.0");
36 this.prefix4Factory = StringValueObjectFactory.create(prefix4Class, "0.0.0.0/0");
37 this.address6Factory = StringValueObjectFactory.create(addr6Class, "::0");
38 this.prefix6Factory = StringValueObjectFactory.create(prefix6Class, "::0/0");
41 protected abstract A ipv4Address(A4 addr);
42 protected abstract A ipv6Address(A6 addr);
43 protected abstract String ipv4AddressString(A4 addr);
44 protected abstract String ipv6AddressString(A6 addr);
45 protected abstract String ipv4PrefixString(P4 prefix);
46 protected abstract String ipv6PrefixString(P6 prefix);
48 @Nonnull public final A ipAddressFor(@Nonnull final byte[] bytes) {
49 switch (bytes.length) {
51 return ipv4Address(ipv4AddressFor(bytes));
53 return ipv6Address(ipv6AddressFor(bytes));
55 throw new IllegalArgumentException("Invalid array length " + bytes.length);
59 @Nonnull public final A ipAddressFor(@Nonnull final InetAddress addr) {
60 Preconditions.checkNotNull(addr, "Address must not be null");
61 if (addr instanceof Inet4Address) {
62 return ipv4Address(ipv4AddressFor(addr));
63 } else if (addr instanceof Inet6Address) {
64 return ipv6Address(ipv6AddressFor(addr));
66 throw new IllegalArgumentException("Unhandled address " + addr);
71 * Create an Ipv4Address by interpreting input bytes as an IPv4 address.
73 * @param bytes 4-byte array
74 * @return An Ipv4Address object
75 * @throws IllegalArgumentException if bytes has length different from 4
76 * @throws NullPointerException if bytes is null
78 @Nonnull public final A4 ipv4AddressFor(@Nonnull final byte[] bytes) {
79 return address4Factory.newInstance(addressStringV4(bytes));
83 * Create an Ipv4Address by interpreting an {@link Inet4Address}.
85 * @param addr An {@link Inet4Address}
86 * @return An Ipv4Address object
87 * @throws IllegalArgumentException if addr is not an {@link Inet4Address}
88 * @throws NullPointerException if addr is null
90 @Nonnull public final A4 ipv4AddressFor(@Nonnull final InetAddress addr) {
91 Preconditions.checkNotNull(addr, "Address must not be null");
92 Preconditions.checkArgument(addr instanceof Inet4Address, "Address has to be an Inet4Address");
93 return address4Factory.newInstance(addr.getHostAddress());
96 @Nonnull public final A4 ipv4AddressFrom(@Nonnull final P4 prefix) {
97 return prefixToAddress(address4Factory, ipv4PrefixString(prefix));
100 @Nonnull public final byte[] ipv4AddressBytes(@Nonnull final A4 addr) {
102 * This implementation relies heavily on the input string having been validated to comply with
103 * the Ipv4Address pattern, which may include a zone index.
105 final String str = ipv4AddressString(addr);
106 final byte[] bytes = new byte[4];
110 for (int i = 0; i < str.length(); ++i) {
111 final char c = str.charAt(i);
114 } else if (c == '.') {
115 bytes[out++] = (byte) val;
118 val = 10 * val + (c - '0');
122 bytes[out] = (byte) val;
127 * Create a /32 Ipv4Prefix by interpreting input bytes as an IPv4 address.
129 * @param bytes four-byte array
130 * @return An Ipv4Prefix object
131 * @throws IllegalArgumentException if bytes has length different from 4
132 * @throws NullPointerException if bytes is null
134 @Nonnull public final P4 ipv4PrefixFor(@Nonnull final byte[] bytes) {
135 return prefix4Factory.newInstance(prefixStringV4(bytes));
139 * Create a Ipv4Prefix by combining the address with a mask. The address
140 * bytes are interpreted as an address and the specified mask is concatenated to
141 * it. The address bytes are not masked, hence input <code>address = { 1, 2, 3, 4 }</code>
142 * and <code>mask=24</code> will result in <code>1.2.3.4/24</code>.
144 * @param address Input address as a 4-byte array
145 * @param mask Prefix mask
146 * @return An Ipv4Prefix object
147 * @throws IllegalArgumentException if bytes has length different from 4 or if mask is not in range 0-32
148 * @throws NullPointerException if bytes is null
150 @Nonnull public final P4 ipv4PrefixFor(@Nonnull final byte[] address, final int mask) {
151 return prefix4Factory.newInstance(prefixStringV4(address, mask));
155 * Create a /32 Ipv4Prefix for an {@link Inet4Address}
157 * @param addr An {@link Inet4Address}
158 * @return An Ipv4Prefix object
159 * @throws IllegalArgumentException if addr is not an Inet4Address
160 * @throws NullPointerException if adds is null
162 @Nonnull public final P4 ipv4PrefixFor(@Nonnull final InetAddress addr) {
163 Preconditions.checkNotNull(addr, "Address must not be null");
164 Preconditions.checkArgument(addr instanceof Inet4Address, "Address has to be an Inet4Address");
165 return prefix4Factory.newInstance(addr.getHostAddress() + "/32");
169 * Create a Ipv4Prefix by combining the address with a mask. The address bytes are not masked.
171 * @param addr An {@link Inet4Address}
172 * @param mask Prefix mask
173 * @return An Ipv4Prefix object
174 * @throws IllegalArgumentException if addr is not an Inet4Address or if mask is not in range 0-32
175 * @throws NullPointerException if addr is null
177 @Nonnull public final P4 ipv4PrefixFor(@Nonnull final InetAddress addr, final int mask) {
178 Preconditions.checkNotNull(addr, "Address must not be null");
179 Preconditions.checkArgument(addr instanceof Inet4Address, "Address has to be an Inet4Address");
180 Preconditions.checkArgument(mask >= 0 && mask <= 32, "Invalid mask %s", mask);
181 return prefix4Factory.newInstance(addr.getHostAddress() + '/' + mask);
184 @Nonnull public final P4 ipv4PrefixFor(@Nonnull final A4 addr) {
185 Preconditions.checkNotNull(addr, "Address must not be null");
186 return prefix4Factory.newInstance(ipv4AddressString(addr) + "/32");
189 @Nonnull public final P4 ipv4PrefixFor(@Nonnull final A4 addr, final int mask) {
190 Preconditions.checkNotNull(addr, "Address must not be null");
191 Preconditions.checkArgument(mask >= 0 && mask <= 32, "Invalid mask %s", mask);
192 return prefix4Factory.newInstance(ipv4AddressString(addr) + '/' + mask);
195 @Nonnull public final Entry<A4, Integer> splitIpv4Prefix(@Nonnull final P4 prefix) {
196 return splitPrefix(address4Factory, ipv4PrefixString(prefix));
200 * Create an Ipv6Address by interpreting input bytes as an IPv6 address.
202 * @param bytes 16-byte array
203 * @return An Ipv6Address object
204 * @throws IllegalArgumentException if bytes has length different from 16
205 * @throws NullPointerException if bytes is null
207 @Nonnull public final A6 ipv6AddressFor(@Nonnull final byte[] bytes) {
208 return address6Factory.newInstance(addressStringV6(bytes));
212 * Create an Ipv6Address by interpreting an {@link Inet6Address}.
214 * @param addr An {@link Inet6Address}
215 * @return An Ipv6Address object
216 * @throws IllegalArgumentException if addr is not an {@link Inet6Address}
217 * @throws NullPointerException if addr is null
219 @Nonnull public final A6 ipv6AddressFor(@Nonnull final InetAddress addr) {
220 Preconditions.checkNotNull(addr, "Address must not be null");
221 Preconditions.checkArgument(addr instanceof Inet6Address, "Address has to be an Inet6Address");
222 return address6Factory.newInstance(addressStringV6(addr));
225 @Nonnull public final A6 ipv6AddressFrom(@Nonnull final P6 prefix) {
226 return prefixToAddress(address6Factory, ipv6PrefixString(prefix));
229 @Nonnull public final byte[] ipv6AddressBytes(@Nonnull final A6 addr) {
230 String str = ipv6AddressString(addr);
231 final int percent = str.indexOf('%');
233 str = str.substring(0, percent);
236 return InetAddresses.forString(str).getAddress();
240 * Create a /128 Ipv6Prefix by interpreting input bytes as an IPv6 address.
242 * @param bytes four-byte array
243 * @return An Ipv6Prefix object
244 * @throws IllegalArgumentException if bytes has length different from 16
245 * @throws NullPointerException if bytes is null
247 @Nonnull public final P6 ipv6PrefixFor(@Nonnull final byte[] bytes) {
248 return prefix6Factory.newInstance(addressStringV6(bytes) + "/128");
252 * Create a Ipv6Prefix by combining the address with a mask. The address
253 * bytes are interpreted as an address and the specified mask is concatenated to
254 * it. The address bytes are not masked.
256 * @param address Input address as a 4-byte array
257 * @param mask Prefix mask
258 * @return An Ipv6Prefix object
259 * @throws IllegalArgumentException if bytes has length different from 16 or if mask is not in range 0-128
260 * @throws NullPointerException if bytes is null
262 @Nonnull public final P6 ipv6PrefixFor(@Nonnull final byte[] address, final int mask) {
263 Preconditions.checkArgument(mask >= 0 && mask <= 128, "Invalid mask %s", mask);
264 return prefix6Factory.newInstance(addressStringV6(address) + '/' + mask);
268 * Create a /128 Ipv6Prefix by interpreting input bytes as an IPv4 address.
270 * @param addr an {@link Inet6Address}
271 * @return An Ipv6Prefix object
272 * @throws IllegalArgumentException if addr is not an Inet6Address or if mask is not in range 0-128
273 * @throws NullPointerException if addr is null
275 @Nonnull public final P6 ipv6PrefixFor(@Nonnull final InetAddress addr) {
276 return prefix6Factory.newInstance(addressStringV6(addr) + "/128");
280 * Create a Ipv6Prefix by combining the address with a mask. The address
281 * bytes are interpreted as an address and the specified mask is concatenated to
282 * it. The address bytes are not masked.
284 * @param addr Input address
285 * @param mask Prefix mask
286 * @return An Ipv6Prefix object
287 * @throws IllegalArgumentException if addr is not an Inet6Address or if mask is not in range 0-128
288 * @throws NullPointerException if addr is null
290 @Nonnull public final P6 ipv6PrefixFor(@Nonnull final InetAddress addr, final int mask) {
291 Preconditions.checkNotNull(addr, "Address must not be null");
292 Preconditions.checkArgument(addr instanceof Inet6Address, "Address has to be an Inet6Address");
293 Preconditions.checkArgument(mask >= 0 && mask <= 128, "Invalid mask %s", mask);
294 return prefix6Factory.newInstance(addressStringV6(addr) + '/' + mask);
297 @Nonnull public final P6 ipv6PrefixFor(@Nonnull final A6 addr) {
298 Preconditions.checkNotNull(addr, "Address must not be null");
299 return prefix6Factory.newInstance(ipv6AddressString(addr) + "/128");
302 @Nonnull public final P6 ipv6PrefixFor(@Nonnull final A6 addr, final int mask) {
303 Preconditions.checkNotNull(addr, "Address must not be null");
304 Preconditions.checkArgument(mask >= 0 && mask <= 128, "Invalid mask %s", mask);
305 return prefix6Factory.newInstance(ipv6AddressString(addr) + '/' + mask);
308 @Nonnull public final Entry<A6, Integer> splitIpv6Prefix(@Nonnull final P6 prefix) {
309 return splitPrefix(address6Factory, ipv6PrefixString(prefix));
312 private static <T> T prefixToAddress(final StringValueObjectFactory<T> factory, final String str) {
313 return factory.newInstance(str.substring(0, str.lastIndexOf('/')));
316 private static <T> Entry<T, Integer> splitPrefix(final StringValueObjectFactory<T> factory, final String str) {
317 final int slash = str.lastIndexOf('/');
318 return new SimpleImmutableEntry<>(factory.newInstance(str.substring(0, slash)),
319 Integer.valueOf(str.substring(slash + 1)));
322 private static void appendIpv4String(final StringBuilder sb, final byte[] bytes) {
323 Preconditions.checkArgument(bytes.length == 4, "IPv4 address length is 4 bytes");
325 sb.append(UnsignedBytes.toInt(bytes[0]));
326 for (int i = 1; i < 4; ++i) {
328 sb.append(UnsignedBytes.toInt(bytes[i]));
332 private static String addressStringV4(final byte[] bytes) {
333 final StringBuilder sb = new StringBuilder(15);
334 appendIpv4String(sb, bytes);
335 return sb.toString();
338 private static String addressStringV6(final byte[] bytes) {
339 Preconditions.checkArgument(bytes.length == 16, "IPv6 address length is 16 bytes");
342 return addressStringV6(Inet6Address.getByAddress(bytes));
343 } catch (UnknownHostException e) {
344 throw new IllegalArgumentException(String.format("Invalid input %s", bytes), e);
348 private static String addressStringV6(final InetAddress addr) {
349 return InetAddresses.toAddrString(addr);
352 private static String prefixStringV4(final byte[] bytes) {
353 final StringBuilder sb = new StringBuilder(18);
354 appendIpv4String(sb, bytes);
356 return sb.toString();
359 private static String prefixStringV4(final byte[] bytes, final int mask) {
360 Preconditions.checkArgument(mask >= 0 && mask <= 32, "Invalid mask %s", mask);
362 final StringBuilder sb = new StringBuilder(18);
363 appendIpv4String(sb, bytes);
366 return sb.toString();