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 public static Ipv6Address addressForBytes(final byte[] bytes) {
38 return new Ipv6Address(InetAddresses.toAddrString(Inet6Address.getByAddress(bytes)));
39 } catch (final UnknownHostException e) {
40 throw new IllegalArgumentException(e.getMessage());
44 public static byte[] bytesForAddress(final Ipv6Address address) {
47 a = (Inet6Address) InetAddress.getByName(address.getValue());
48 } catch (final UnknownHostException e) {
49 throw new IllegalArgumentException(e.getMessage());
51 return a.getAddress();
54 public static byte[] bytesForPrefix(final Ipv6Prefix prefix) {
55 final String p = prefix.getValue();
56 final int sep = p.indexOf("/");
58 final byte[] bytes = Inet6Address.getByName(p.substring(0, sep)).getAddress();
59 return Bytes.concat(bytes, new byte[] { Byte.valueOf(p.substring(sep + 1, p.length() - 1)) });
60 } catch (final UnknownHostException e) {
61 throw new IllegalArgumentException(e.getMessage());
65 public static Ipv6Prefix prefixForBytes(final byte[] bytes, final int length) {
66 Preconditions.checkArgument(length <= bytes.length * 8);
67 final byte[] tmp = Arrays.copyOfRange(bytes, 0, 16);
70 a = InetAddress.getByAddress(tmp);
71 } catch (final UnknownHostException e) {
72 throw new IllegalArgumentException(e.getMessage());
74 return new Ipv6Prefix(InetAddresses.toAddrString(a) + "/" + length);
77 public static List<Ipv6Prefix> prefixListForBytes(final byte[] bytes) {
78 if (bytes.length == 0) {
79 return Collections.emptyList();
82 final List<Ipv6Prefix> list = Lists.newArrayList();
84 while (byteOffset < bytes.length) {
85 final int bitLength = UnsignedBytes.toInt(ByteArray.subByte(bytes, byteOffset, 1)[0]);
87 final int byteCount = (bitLength % 8 != 0) ? (bitLength / 8) + 1 : bitLength / 8;
88 list.add(prefixForBytes(ByteArray.subByte(bytes, byteOffset, byteCount), bitLength));
89 byteOffset += byteCount;