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.concepts;
10 import java.net.Inet6Address;
11 import java.net.InetAddress;
12 import java.net.UnknownHostException;
13 import java.util.Arrays;
14 import java.util.Collections;
15 import java.util.List;
17 import org.opendaylight.protocol.util.ByteArray;
18 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev100924.Ipv6Address;
19 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev100924.Ipv6Prefix;
21 import com.google.common.base.Preconditions;
22 import com.google.common.collect.Lists;
23 import com.google.common.net.InetAddresses;
24 import com.google.common.primitives.Bytes;
25 import com.google.common.primitives.UnsignedBytes;
28 * Util class for creating generated Ipv6Address.
30 public class Ipv6Util {
34 public static final int IPV6_LENGTH = 16;
36 private static InetAddress getAddress(final byte[] bytes) {
38 return Inet6Address.getByAddress(bytes);
39 } catch (UnknownHostException e) {
40 throw new IllegalArgumentException("Failed to construct IPv6 address", e);
44 public static Ipv6Address addressForBytes(final byte[] bytes) {
45 return new Ipv6Address(InetAddresses.toAddrString(getAddress(bytes)));
48 public static byte[] bytesForAddress(final Ipv6Address address) {
49 final InetAddress a = InetAddresses.forString(address.getValue());
50 Preconditions.checkArgument(a instanceof Inet6Address);
51 return a.getAddress();
54 public static byte[] bytesForPrefix(final Ipv6Prefix prefix) {
55 final String p = prefix.getValue();
56 final int sep = p.indexOf("/");
57 final InetAddress a = InetAddresses.forString(p.substring(0, sep));
58 Preconditions.checkArgument(a instanceof Inet6Address);
59 final byte[] bytes = a.getAddress();
60 return Bytes.concat(bytes, new byte[] { Byte.valueOf(p.substring(sep + 1, p.length())) });
63 public static Ipv6Prefix prefixForBytes(final byte[] bytes, final int length) {
64 Preconditions.checkArgument(length <= bytes.length * 8);
65 final byte[] tmp = Arrays.copyOfRange(bytes, 0, 16);
66 final InetAddress a = getAddress(tmp);
67 return new Ipv6Prefix(InetAddresses.toAddrString(a) + "/" + length);
70 public static List<Ipv6Prefix> prefixListForBytes(final byte[] bytes) {
71 if (bytes.length == 0) {
72 return Collections.emptyList();
75 final List<Ipv6Prefix> list = Lists.newArrayList();
77 while (byteOffset < bytes.length) {
78 final int bitLength = UnsignedBytes.toInt(ByteArray.subByte(bytes, byteOffset, 1)[0]);
80 final int byteCount = (bitLength % 8 != 0) ? (bitLength / 8) + 1 : bitLength / 8;
81 list.add(prefixForBytes(ByteArray.subByte(bytes, byteOffset, byteCount), bitLength));
82 byteOffset += byteCount;