1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
|
/*
* Copyright 2014 Open Networking Laboratory
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.onlab.packet;
import java.net.InetAddress;
import java.net.Inet4Address;
import java.net.Inet6Address;
import java.util.Arrays;
import com.google.common.net.InetAddresses;
/**
* A class representing an IPv6 address.
* This class is immutable.
*/
public final class Ip6Address extends IpAddress {
public static final IpAddress.Version VERSION = IpAddress.Version.INET6;
public static final int BYTE_LENGTH = IpAddress.INET6_BYTE_LENGTH;
public static final int BIT_LENGTH = IpAddress.INET6_BIT_LENGTH;
/**
* Constructor for given IP address version and address octets.
*
* @param value the IP address value stored in network byte order
* (i.e., the most significant byte first)
* @throws IllegalArgumentException if the arguments are invalid
*/
private Ip6Address(byte[] value) {
super(VERSION, value);
}
/**
* Converts a byte array into an IPv6 address.
*
* @param value the IPv6 address value stored in network byte order
* (i.e., the most significant byte first)
* @return an IPv6 address
* @throws IllegalArgumentException if the argument is invalid
*/
public static Ip6Address valueOf(byte[] value) {
return new Ip6Address(value);
}
/**
* Converts a byte array and a given offset from the beginning of the
* array into an IPv6 address.
* <p>
* The IP address is stored in network byte order (i.e., the most
* significant byte first).
* </p>
* @param value the value to use
* @param offset the offset in bytes from the beginning of the byte array
* @return an IPv6 address
* @throws IllegalArgumentException if the arguments are invalid
*/
public static Ip6Address valueOf(byte[] value, int offset) {
IpAddress.checkArguments(VERSION, value, offset);
byte[] bc = Arrays.copyOfRange(value, offset, value.length);
return Ip6Address.valueOf(bc);
}
/**
* Converts an InetAddress into an IPv6 address.
*
* @param inetAddress the InetAddress value to use. It must contain an IPv6
* address
* @return an IPv6 address
* @throws IllegalArgumentException if the argument is invalid
*/
public static Ip6Address valueOf(InetAddress inetAddress) {
byte[] bytes = inetAddress.getAddress();
if (inetAddress instanceof Inet6Address) {
return new Ip6Address(bytes);
}
if ((inetAddress instanceof Inet4Address) ||
(bytes.length == INET_BYTE_LENGTH)) {
final String msg = "Invalid IPv6 version address string: " +
inetAddress.toString();
throw new IllegalArgumentException(msg);
}
// Use the number of bytes as a hint
if (bytes.length == INET6_BYTE_LENGTH) {
return new Ip6Address(bytes);
}
final String msg = "Unrecognized IP version address string: " +
inetAddress.toString();
throw new IllegalArgumentException(msg);
}
/**
* Converts an IPv6 string literal (e.g., "1111:2222::8888") into an IP
* address.
*
* @param value an IPv6 address value in string form
* @return an IPv6 address
* @throws IllegalArgumentException if the argument is invalid
*/
public static Ip6Address valueOf(String value) {
InetAddress inetAddress = null;
try {
inetAddress = InetAddresses.forString(value);
} catch (IllegalArgumentException e) {
final String msg = "Invalid IP address string: " + value;
throw new IllegalArgumentException(msg);
}
return valueOf(inetAddress);
}
/**
* Creates an IPv6 network mask prefix.
*
* @param prefixLength the length of the mask prefix. Must be in the
* interval [0, 128]
* @return a new IPv6 address that contains a mask prefix of the
* specified length
* @throws IllegalArgumentException if the arguments are invalid
*/
public static Ip6Address makeMaskPrefix(int prefixLength) {
byte[] mask = IpAddress.makeMaskPrefixArray(VERSION, prefixLength);
return new Ip6Address(mask);
}
/**
* Creates an IPv6 address by masking it with a network mask of given
* mask length.
*
* @param address the address to mask
* @param prefixLength the length of the mask prefix. Must be in the
* interval [0, 128]
* @return a new IPv6 address that is masked with a mask prefix of the
* specified length
* @throws IllegalArgumentException if the prefix length is invalid
*/
public static Ip6Address makeMaskedAddress(final Ip6Address address,
int prefixLength) {
byte[] net = makeMaskedAddressArray(address, prefixLength);
return Ip6Address.valueOf(net);
}
}
|
