2 * Copyright (c) 2013 Cisco Systems, Inc. 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.protocol.util;
10 import com.google.common.base.Preconditions;
11 import com.google.common.net.InetAddresses;
12 import com.google.common.primitives.UnsignedBytes;
13 import io.netty.buffer.ByteBuf;
14 import io.netty.buffer.Unpooled;
15 import java.net.InetAddress;
16 import java.net.InetSocketAddress;
17 import java.util.ArrayList;
18 import java.util.Arrays;
19 import java.util.Collections;
20 import java.util.List;
22 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev100924.IetfInetUtil;
23 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev100924.IpAddress;
24 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev100924.Ipv4Address;
25 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev100924.Ipv4Prefix;
26 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev100924.PortNumber;
29 * Util class for creating generated Ipv4Address.
31 public final class Ipv4Util {
32 public static final int IP4_LENGTH = 4;
33 public static final int IP4_BITS_LENGTH = 32;
34 private static final Ipv4Prefix EMPTY_PREFIX = new Ipv4Prefix("0.0.0.0/0");
37 throw new UnsupportedOperationException();
41 * Reads from ByteBuf buffer and converts bytes to Ipv4Address.
43 * @param buffer containing Ipv4 address, starting at reader index
46 public static Ipv4Address addressForByteBuf(final ByteBuf buffer) {
47 return IetfInetUtil.INSTANCE.ipv4AddressFor(ByteArray.readBytes(buffer, IP4_LENGTH));
51 * From string ipAddress creates an InetAddress and puts it into ByteBuf.
52 * @param ipAddress Ipv4 address
53 * @return ByteBuf with filled in bytes from ipAddress
55 public static ByteBuf byteBufForAddress(final Ipv4Address ipAddress) {
56 return Unpooled.wrappedBuffer(bytesForAddress(ipAddress));
60 * Converts Ipv4Address to byte array.
62 * @param address Ipv4Address to be converted
65 public static byte[] bytesForAddress(final Ipv4Address address) {
66 return IetfInetUtil.INSTANCE.ipv4AddressBytes(address);
69 public static int prefixBitsToBytes(final int bits) {
70 if (bits % Byte.SIZE != 0) {
71 return (bits / Byte.SIZE) + 1;
73 return bits / Byte.SIZE;
77 * Returns number of minimum bytes needed to cover all bits of prefix.
82 public static int getPrefixLengthBytes(final String prefix) {
83 return prefixBitsToBytes(Ipv4Util.getPrefixLength(prefix));
87 * Converts Ipv4Prefix to byte array. Prefix length at the end.
89 * @param prefix Ipv4Prefix to be converted
90 * @return byte array with prefix length at the end
92 public static byte[] bytesForPrefix(final Ipv4Prefix prefix) {
93 return IetfInetUtil.INSTANCE.ipv4PrefixToBytes(prefix);
97 * Converts Ipv4Prefix to byte array. Prefix length at the beginning.
98 * Prefix bytes are trimmed from the end to match prefix length.
100 * @param prefix Ipv4Prefix to be converted
101 * @return byte array with the prefix length at the beginning
103 * @deprecated This is inefficient, refactor code to use {@link #bytesForAddress(Ipv4Address)} or
104 * {@link ByteBufWriteUtil#writeMinimalPrefix(Ipv4Prefix, ByteBuf)}.
107 public static byte[] bytesForPrefixBegin(final Ipv4Prefix prefix) {
108 final byte[] addrWithPrefix = bytesForPrefix(prefix);
109 return prefixedBytes(addrWithPrefix[IP4_LENGTH], addrWithPrefix);
112 static byte[] prefixedBytes(final byte prefixBits, final byte[] address) {
113 if (prefixBits != 0) {
114 final int prefixBytes = prefixBitsToBytes(Byte.toUnsignedInt(prefixBits));
115 final byte[] ret = new byte[prefixBytes + 1];
117 System.arraycopy(address, 0, ret, 1, prefixBytes);
120 return new byte[] { 0 };
125 * Creates an Ipv4Prefix object from given byte array.
127 * @param bytes IPv4 address
128 * @param length prefix length
129 * @return Ipv4Prefix object
131 public static Ipv4Prefix prefixForBytes(final byte[] bytes, final int length) {
132 Preconditions.checkArgument(length <= bytes.length * Byte.SIZE);
135 if (bytes.length != IP4_LENGTH) {
136 tmp = Arrays.copyOfRange(bytes, 0, IP4_LENGTH);
141 return IetfInetUtil.INSTANCE.ipv4PrefixFor(tmp, length);
145 * Creates an Ipv4Prefix object from given ByteBuf. Prefix length is assumed to
146 * be in the left most byte of the buffer.
148 * @param buf Buffer containing serialized prefix
149 * @return Ipv4Prefix object
151 public static Ipv4Prefix prefixForByteBuf(final ByteBuf buf) {
152 final int prefixLength = buf.readByte();
153 final int size = prefixLength / Byte.SIZE + ((prefixLength % Byte.SIZE == 0) ? 0 : 1);
154 final int readable = buf.readableBytes();
155 Preconditions.checkArgument(size <= readable, "Illegal length of IP prefix: %s/%s", size, readable);
157 final byte[] bytes = new byte[IP4_LENGTH];
158 buf.readBytes(bytes, 0, size);
159 return IetfInetUtil.INSTANCE.ipv4PrefixFor(bytes, prefixLength);
163 * Creates a list of Ipv4 Prefixes from given byte array.
165 * @param bytes to be converted to List of Ipv4Prefixes.
166 * @return A list of Ipv4Prefixes
168 public static List<Ipv4Prefix> prefixListForBytes(final byte[] bytes) {
169 if (bytes.length == 0) {
170 return Collections.emptyList();
172 final List<Ipv4Prefix> list = new ArrayList<>();
174 while (byteOffset < bytes.length) {
175 final int bitLength = UnsignedBytes.toInt(bytes[byteOffset]);
177 // if length == 0, default route will be added
178 if (bitLength == 0) {
179 list.add(EMPTY_PREFIX);
183 list.add(IetfInetUtil.INSTANCE.ipv4PrefixForShort(bytes, byteOffset, bitLength));
184 byteOffset += bitLength / Byte.SIZE;
185 if (bitLength % Byte.SIZE != 0) {
194 * Obtains prefix length from given string prefix.
196 * @param prefixValue value of prefix
197 * @return prefix length
199 protected static int getPrefixLength(final String prefixValue) {
200 final int sep = prefixValue.indexOf('/');
201 return Integer.parseInt(prefixValue.substring(sep + 1, prefixValue.length()));
205 * Converts InetAddress to IpAddress.
210 public static IpAddress getIpAddress(final InetAddress inetAddress) {
211 return IetfInetUtil.INSTANCE.ipAddressFor(inetAddress);
215 * Converts IpAddress and PortNumber to InetSocketAddress
219 * @return InetSocketAddress
221 public static InetSocketAddress toInetSocketAddress(final IpAddress ipAddress, final PortNumber port) {
222 final String ipString;
223 if (ipAddress.getIpv4Address() != null) {
224 ipString = ipAddress.getIpv4Address().getValue();
226 ipString = ipAddress.getIpv6Address().getValue();
228 return new InetSocketAddress(InetAddresses.forString(ipString), port.getValue());
234 * @param ipv4Address String containing Ipv4Address
235 * @return String containing Ipv4Address incremented by 1
237 public static String incrementIpv4Address(final String ipv4Address) {
238 return InetAddresses.increment(InetAddresses.forString(ipv4Address)).getHostAddress();
244 * @param ipv4Address ipv4 address to be incremented
245 * @return new ipv4 address
247 public static Ipv4Address incrementIpv4Address(final Ipv4Address ipv4Address) {
248 return new Ipv4Address(incrementIpv4Address(ipv4Address.getValue()));
251 public static Ipv4Prefix incrementIpv4Prefix(final Ipv4Prefix ipv4Prefix) {
252 final Map.Entry<Ipv4Address, Integer> splitIpv4Prefix = IetfInetUtil.INSTANCE.splitIpv4Prefix(ipv4Prefix);
253 return IetfInetUtil.INSTANCE.ipv4PrefixFor(incrementIpv4Address(splitIpv4Prefix.getKey()), splitIpv4Prefix.getValue());