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));
142 * Create a /32 Ipv4Prefix for an {@link Inet4Address}
144 * @param addr An {@link Inet4Address}
145 * @return An Ipv4Prefix object
146 * @throws IllegalArgumentException if addr is not an Inet4Address
147 * @throws NullPointerException if adds is null
149 @Nonnull public final P4 ipv4PrefixFor(@Nonnull final InetAddress addr) {
150 Preconditions.checkNotNull(addr, "Address must not be null");
151 Preconditions.checkArgument(addr instanceof Inet4Address, "Address has to be an Inet4Address");
152 return prefix4Factory.newInstance(addr.getHostAddress() + "/32");
156 * Create a Ipv4Prefix by combining the address with a mask. The address bytes are not masked.
158 * @param addr An {@link Inet4Address}
159 * @param mask Prefix mask
160 * @return An Ipv4Prefix object
161 * @throws IllegalArgumentException if addr is not an Inet4Address or if mask is not in range 0-32
162 * @throws NullPointerException if addr is null
164 @Nonnull public final P4 ipv4PrefixFor(@Nonnull final InetAddress addr, final int mask) {
165 Preconditions.checkNotNull(addr, "Address must not be null");
166 Preconditions.checkArgument(addr instanceof Inet4Address, "Address has to be an Inet4Address");
167 Preconditions.checkArgument(mask >= 0 && mask <= 32, "Invalid mask %s", mask);
168 return prefix4Factory.newInstance(addr.getHostAddress() + '/' + mask);
171 @Nonnull public final P4 ipv4PrefixFor(@Nonnull final A4 addr) {
172 Preconditions.checkNotNull(addr, "Address must not be null");
173 return prefix4Factory.newInstance(ipv4AddressString(addr) + "/32");
176 @Nonnull public final P4 ipv4PrefixFor(@Nonnull final A4 addr, final int mask) {
177 Preconditions.checkNotNull(addr, "Address must not be null");
178 Preconditions.checkArgument(mask >= 0 && mask <= 32, "Invalid mask %s", mask);
179 return prefix4Factory.newInstance(ipv4AddressString(addr) + '/' + mask);
182 @Nonnull public final Entry<A4, Integer> splitIpv4Prefix(@Nonnull final P4 prefix) {
183 return splitPrefix(address4Factory, ipv4PrefixString(prefix));
186 @Nonnull public final byte[] ipv4PrefixToBytes(@Nonnull final P4 prefix) {
187 final String str = ipv4PrefixString(prefix);
188 final int slash = str.lastIndexOf('/');
190 final byte[] bytes = new byte[INET4_LENGTH + 1];
191 Ipv4Utils.fillIpv4Bytes(bytes, 0, str, 0, slash);
192 bytes[INET4_LENGTH] = (byte)Integer.parseInt(str.substring(slash + 1), 10);
197 * Create an Ipv6Address by interpreting input bytes as an IPv6 address.
199 * @param bytes 16-byte array
200 * @return An Ipv6Address object
201 * @throws IllegalArgumentException if bytes has length different from 16
202 * @throws NullPointerException if bytes is null
204 @Nonnull public final A6 ipv6AddressFor(@Nonnull final byte[] bytes) {
205 return address6Factory.newInstance(addressStringV6(bytes));
209 * Create an Ipv6Address by interpreting an {@link Inet6Address}.
211 * @param addr An {@link Inet6Address}
212 * @return An Ipv6Address object
213 * @throws IllegalArgumentException if addr is not an {@link Inet6Address}
214 * @throws NullPointerException if addr is null
216 @Nonnull public final A6 ipv6AddressFor(@Nonnull final InetAddress addr) {
217 Preconditions.checkNotNull(addr, "Address must not be null");
218 Preconditions.checkArgument(addr instanceof Inet6Address, "Address has to be an Inet6Address");
219 return address6Factory.newInstance(addressStringV6(addr));
222 @Nonnull public final A6 ipv6AddressFrom(@Nonnull final P6 prefix) {
223 return prefixToAddress(address6Factory, ipv6PrefixString(prefix));
226 @Nonnull public final byte[] ipv6AddressBytes(@Nonnull final A6 addr) {
227 String str = ipv6AddressString(addr);
228 final int percent = str.indexOf('%');
230 str = str.substring(0, percent);
233 return InetAddresses.forString(str).getAddress();
237 * Create a /128 Ipv6Prefix by interpreting input bytes as an IPv6 address.
239 * @param bytes four-byte array
240 * @return An Ipv6Prefix object
241 * @throws IllegalArgumentException if bytes has length different from 16
242 * @throws NullPointerException if bytes is null
244 @Nonnull public final P6 ipv6PrefixFor(@Nonnull final byte[] bytes) {
245 return prefix6Factory.newInstance(addressStringV6(bytes) + "/128");
249 * Create a Ipv6Prefix by combining the address with a mask. The address
250 * bytes are interpreted as an address and the specified mask is concatenated to
251 * it. The address bytes are not masked.
253 * @param address Input address as a 4-byte array
254 * @param mask Prefix mask
255 * @return An Ipv6Prefix object
256 * @throws IllegalArgumentException if bytes has length different from 16 or if mask is not in range 0-128
257 * @throws NullPointerException if bytes is null
259 @Nonnull public final P6 ipv6PrefixFor(@Nonnull final byte[] address, final int mask) {
260 Preconditions.checkArgument(mask >= 0 && mask <= 128, "Invalid mask %s", mask);
261 return prefix6Factory.newInstance(addressStringV6(address) + '/' + mask);
265 * Create a /128 Ipv6Prefix by interpreting input bytes as an IPv4 address.
267 * @param addr an {@link Inet6Address}
268 * @return An Ipv6Prefix object
269 * @throws IllegalArgumentException if addr is not an Inet6Address or if mask is not in range 0-128
270 * @throws NullPointerException if addr is null
272 @Nonnull public final P6 ipv6PrefixFor(@Nonnull final InetAddress addr) {
273 return prefix6Factory.newInstance(addressStringV6(addr) + "/128");
277 * Create a Ipv6Prefix by combining the address with a mask. The address
278 * bytes are interpreted as an address and the specified mask is concatenated to
279 * it. The address bytes are not masked.
281 * @param addr Input address
282 * @param mask Prefix mask
283 * @return An Ipv6Prefix object
284 * @throws IllegalArgumentException if addr is not an Inet6Address or if mask is not in range 0-128
285 * @throws NullPointerException if addr is null
287 @Nonnull public final P6 ipv6PrefixFor(@Nonnull final InetAddress addr, final int mask) {
288 Preconditions.checkNotNull(addr, "Address must not be null");
289 Preconditions.checkArgument(addr instanceof Inet6Address, "Address has to be an Inet6Address");
290 Preconditions.checkArgument(mask >= 0 && mask <= 128, "Invalid mask %s", mask);
291 return prefix6Factory.newInstance(addressStringV6(addr) + '/' + mask);
294 @Nonnull public final P6 ipv6PrefixFor(@Nonnull final A6 addr) {
295 Preconditions.checkNotNull(addr, "Address must not be null");
296 return prefix6Factory.newInstance(ipv6AddressString(addr) + "/128");
299 @Nonnull public final P6 ipv6PrefixFor(@Nonnull final A6 addr, final int mask) {
300 Preconditions.checkNotNull(addr, "Address must not be null");
301 Preconditions.checkArgument(mask >= 0 && mask <= 128, "Invalid mask %s", mask);
302 return prefix6Factory.newInstance(ipv6AddressString(addr) + '/' + mask);
305 @Nonnull public final Entry<A6, Integer> splitIpv6Prefix(@Nonnull final P6 prefix) {
306 return splitPrefix(address6Factory, ipv6PrefixString(prefix));
309 private static <T> T prefixToAddress(final StringValueObjectFactory<T> factory, final String str) {
310 return factory.newInstance(str.substring(0, str.lastIndexOf('/')));
313 private static <T> Entry<T, Integer> splitPrefix(final StringValueObjectFactory<T> factory, final String str) {
314 final int slash = str.lastIndexOf('/');
315 return new SimpleImmutableEntry<>(factory.newInstance(str.substring(0, slash)),
316 Integer.valueOf(str.substring(slash + 1)));
319 @Nonnull public final byte[] ipv6PrefixToBytes(@Nonnull final P6 prefix) {
320 final String str = ipv6PrefixString(prefix);
321 final int slash = str.lastIndexOf('/');
323 final byte[] bytes = new byte[INET6_LENGTH + 1];
324 System.arraycopy(InetAddresses.forString(str.substring(0, slash)).getAddress(), 0, bytes, 0, INET6_LENGTH);
325 bytes[INET6_LENGTH] = (byte)Integer.parseInt(str.substring(slash + 1), 10);
329 private static void appendIpv4String(final StringBuilder sb, final byte[] bytes) {
330 Preconditions.checkArgument(bytes.length == INET4_LENGTH, "IPv4 address length is 4 bytes");
332 sb.append(Byte.toUnsignedInt(bytes[0]));
333 for (int i = 1; i < INET4_LENGTH; ++i) {
335 sb.append(Byte.toUnsignedInt(bytes[i]));
339 private static String addressStringV4(final byte[] bytes) {
340 final StringBuilder sb = new StringBuilder(15);
341 appendIpv4String(sb, bytes);
342 return sb.toString();
345 private static String addressStringV6(final byte[] bytes) {
346 Preconditions.checkArgument(bytes.length == INET6_LENGTH, "IPv6 address length is 16 bytes");
349 return addressStringV6(Inet6Address.getByAddress(bytes));
350 } catch (UnknownHostException e) {
351 throw new IllegalArgumentException(String.format("Invalid input %s", bytes), e);
355 private static String addressStringV6(final InetAddress addr) {
356 return InetAddresses.toAddrString(addr);
359 private static String prefixStringV4(final byte[] bytes) {
360 final StringBuilder sb = new StringBuilder(18);
361 appendIpv4String(sb, bytes);
363 return sb.toString();
366 private static String prefixStringV4(final byte[] bytes, final int mask) {
367 Preconditions.checkArgument(mask >= 0 && mask <= 32, "Invalid mask %s", mask);
369 final StringBuilder sb = new StringBuilder(18);
370 appendIpv4String(sb, bytes);
373 return sb.toString();