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
|
/*
* Copyright 2014-2015 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.onosproject.routing;
import com.google.common.base.MoreObjects;
import org.onlab.packet.IpAddress;
import org.onlab.packet.IpPrefix;
import java.util.Objects;
import static com.google.common.base.Preconditions.checkNotNull;
/**
* Represents a route entry for an IP prefix.
*/
public class RouteEntry {
private final IpPrefix prefix; // The IP prefix
private final IpAddress nextHop; // Next-hop IP address
/**
* Class constructor.
*
* @param prefix the IP prefix of the route
* @param nextHop the next hop IP address for the route
*/
public RouteEntry(IpPrefix prefix, IpAddress nextHop) {
this.prefix = checkNotNull(prefix);
this.nextHop = checkNotNull(nextHop);
}
/**
* Returns the IP version of the route.
*
* @return the IP version of the route
*/
public IpAddress.Version version() {
return nextHop.version();
}
/**
* Tests whether the IP version of this address is IPv4.
*
* @return true if the IP version of this address is IPv4, otherwise false.
*/
public boolean isIp4() {
return nextHop.isIp4();
}
/**
* Tests whether the IP version of this address is IPv6.
*
* @return true if the IP version of this address is IPv6, otherwise false.
*/
public boolean isIp6() {
return nextHop.isIp6();
}
/**
* Returns the IP prefix of the route.
*
* @return the IP prefix of the route
*/
public IpPrefix prefix() {
return prefix;
}
/**
* Returns the next hop IP address for the route.
*
* @return the next hop IP address for the route
*/
public IpAddress nextHop() {
return nextHop;
}
/**
* Creates the binary string representation of an IP prefix.
* The prefix can be either IPv4 or IPv6.
* The string length is equal to the prefix length.
*
* @param ipPrefix the IP prefix to use
* @return the binary string representation
*/
public static String createBinaryString(IpPrefix ipPrefix) {
if (ipPrefix.prefixLength() == 0) {
return "";
}
byte[] octets = ipPrefix.address().toOctets();
StringBuilder result = new StringBuilder(ipPrefix.prefixLength());
for (int i = 0; i < ipPrefix.prefixLength(); i++) {
int byteOffset = i / Byte.SIZE;
int bitOffset = i % Byte.SIZE;
int mask = 1 << (Byte.SIZE - 1 - bitOffset);
byte value = octets[byteOffset];
boolean isSet = ((value & mask) != 0);
result.append(isSet ? "1" : "0");
}
return result.toString();
}
@Override
public boolean equals(Object other) {
if (this == other) {
return true;
}
//
// NOTE: Subclasses are considered as change of identity, hence
// equals() will return false if the class type doesn't match.
//
if (other == null || getClass() != other.getClass()) {
return false;
}
RouteEntry otherRoute = (RouteEntry) other;
return Objects.equals(this.prefix, otherRoute.prefix) &&
Objects.equals(this.nextHop, otherRoute.nextHop);
}
@Override
public int hashCode() {
return Objects.hash(prefix, nextHop);
}
@Override
public String toString() {
return MoreObjects.toStringHelper(getClass())
.add("prefix", prefix)
.add("nextHop", nextHop)
.toString();
}
}
|
