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.rev130715.IetfInetUtil;
23 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.IpAddress;
24 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.Ipv4Address;
25 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.Ipv4Prefix;
26 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.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.
53 * @param ipAddress Ipv4 address
54 * @return ByteBuf with filled in bytes from ipAddress
56 public static ByteBuf byteBufForAddress(final Ipv4Address ipAddress) {
57 return Unpooled.wrappedBuffer(bytesForAddress(ipAddress));
61 * Converts Ipv4Address to byte array.
63 * @param address Ipv4Address to be converted
66 public static byte[] bytesForAddress(final Ipv4Address address) {
67 return IetfInetUtil.INSTANCE.ipv4AddressBytes(address);
70 public static int prefixBitsToBytes(final int bits) {
71 if (bits % Byte.SIZE != 0) {
72 return (bits / Byte.SIZE) + 1;
74 return bits / Byte.SIZE;
78 * Returns number of minimum bytes needed to cover all bits of prefix.
80 public static int getPrefixLengthBytes(final String prefix) {
81 return prefixBitsToBytes(Ipv4Util.getPrefixLength(prefix));
85 * Converts Ipv4Prefix to byte array. Prefix length at the end.
87 * @param prefix Ipv4Prefix to be converted
88 * @return byte array with prefix length at the end
90 public static byte[] bytesForPrefix(final Ipv4Prefix prefix) {
91 return IetfInetUtil.INSTANCE.ipv4PrefixToBytes(prefix);
95 * Creates an Ipv4Prefix object from given byte array.
97 * @param bytes IPv4 address
98 * @param length prefix length
99 * @return Ipv4Prefix object
101 public static Ipv4Prefix prefixForBytes(final byte[] bytes, final int length) {
102 Preconditions.checkArgument(length <= bytes.length * Byte.SIZE);
105 if (bytes.length != IP4_LENGTH) {
106 tmp = Arrays.copyOfRange(bytes, 0, IP4_LENGTH);
111 return IetfInetUtil.INSTANCE.ipv4PrefixFor(tmp, length);
115 * Creates an Ipv4Prefix object from given ByteBuf. Prefix length is assumed to
116 * be in the left most byte of the buffer.
118 * @param buf Buffer containing serialized prefix
119 * @return Ipv4Prefix object
121 public static Ipv4Prefix prefixForByteBuf(final ByteBuf buf) {
122 final int prefixLength = UnsignedBytes.toInt(buf.readByte());
123 final int size = prefixLength / Byte.SIZE + ((prefixLength % Byte.SIZE == 0) ? 0 : 1);
124 final int readable = buf.readableBytes();
125 Preconditions.checkArgument(size <= readable, "Illegal length of IP prefix: %s/%s", size, readable);
127 final byte[] bytes = new byte[IP4_LENGTH];
128 buf.readBytes(bytes, 0, size);
129 return IetfInetUtil.INSTANCE.ipv4PrefixFor(bytes, prefixLength);
133 * Creates a list of Ipv4 Prefixes from given byte array.
135 * @param bytes to be converted to List of Ipv4Prefixes.
136 * @return A list of Ipv4Prefixes
138 public static List<Ipv4Prefix> prefixListForBytes(final byte[] bytes) {
139 if (bytes.length == 0) {
140 return Collections.emptyList();
142 final List<Ipv4Prefix> list = new ArrayList<>();
144 while (byteOffset < bytes.length) {
145 final int bitLength = UnsignedBytes.toInt(bytes[byteOffset]);
147 // if length == 0, default route will be added
148 if (bitLength == 0) {
149 list.add(EMPTY_PREFIX);
153 list.add(IetfInetUtil.INSTANCE.ipv4PrefixForShort(bytes, byteOffset, bitLength));
154 byteOffset += bitLength / Byte.SIZE;
155 if (bitLength % Byte.SIZE != 0) {
164 * Obtains prefix length from given string prefix.
166 * @param prefixValue value of prefix
167 * @return prefix length
169 protected static int getPrefixLength(final String prefixValue) {
170 final int sep = prefixValue.indexOf('/');
171 return Integer.parseInt(prefixValue.substring(sep + 1, prefixValue.length()));
175 * Converts InetAddress to IpAddress.
177 * @param inetAddress address
180 public static IpAddress getIpAddress(final InetAddress inetAddress) {
181 return IetfInetUtil.INSTANCE.ipAddressFor(inetAddress);
185 * Converts IpAddress and PortNumber to InetSocketAddress.
187 * @param ipAddress address
189 * @return InetSocketAddress
191 public static InetSocketAddress toInetSocketAddress(final IpAddress ipAddress, final PortNumber port) {
192 final String ipString = toStringIP(ipAddress);
193 return new InetSocketAddress(InetAddresses.forString(ipString), port.getValue());
199 * @param ipv4Address String containing Ipv4Address
200 * @return String containing Ipv4Address incremented by 1
202 public static String incrementIpv4Address(final String ipv4Address) {
203 return InetAddresses.increment(InetAddresses.forString(ipv4Address)).getHostAddress();
209 * @param ipv4Address ipv4 address to be incremented
210 * @return new ipv4 address
212 public static Ipv4Address incrementIpv4Address(final Ipv4Address ipv4Address) {
213 return new Ipv4Address(incrementIpv4Address(ipv4Address.getValue()));
216 public static Ipv4Prefix incrementIpv4Prefix(final Ipv4Prefix ipv4Prefix) {
217 final Map.Entry<Ipv4Address, Integer> splitIpv4Prefix = IetfInetUtil.INSTANCE.splitIpv4Prefix(ipv4Prefix);
218 return IetfInetUtil.INSTANCE.ipv4PrefixFor(incrementIpv4Address(splitIpv4Prefix.getKey()),
219 splitIpv4Prefix.getValue());
223 * Get string representation of IpAddress.
225 * @param ipAddress address
226 * @return String value of Ipv4Address or Ipv6Address
228 public static String toStringIP(final IpAddress ipAddress) {
229 if (ipAddress.getIpv4Address() != null) {
230 return ipAddress.getIpv4Address().getValue();
232 return ipAddress.getIpv6Address().getValue();