blob: 0f78ab77103b4d4c43d46c16d6a2b00f2ca49411 (
plain)
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
|
/*
* Copyright 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.bgpio.types;
import java.util.Objects;
import org.jboss.netty.buffer.ChannelBuffer;
import org.onosproject.bgpio.exceptions.BGPParseException;
import org.onosproject.bgpio.util.Constants;
import org.onosproject.bgpio.util.Validation;
import com.google.common.base.MoreObjects;
/**
* Provides implementation of LocalPref BGP Path Attribute.
*/
public class LocalPref implements BGPValueType {
public static final byte LOCAL_PREF_TYPE = 5;
public static final byte LOCAL_PREF_MAX_LEN = 4;
private int localPref;
/**
* Constructor to initialize LocalPref.
*
* @param localPref local preference
*/
public LocalPref(int localPref) {
this.localPref = localPref;
}
/**
* Returns local preference value.
*
* @return local preference value
*/
public int localPref() {
return this.localPref;
}
/**
* Reads the channel buffer and returns object of LocalPref.
*
* @param cb channelBuffer
* @return object of LocalPref
* @throws BGPParseException while parsing localPref attribute
*/
public static LocalPref read(ChannelBuffer cb) throws BGPParseException {
int localPref;
ChannelBuffer tempCb = cb.copy();
Validation parseFlags = Validation.parseAttributeHeader(cb);
if ((parseFlags.getLength() > LOCAL_PREF_MAX_LEN) || cb.readableBytes() < parseFlags.getLength()) {
Validation.validateLen(BGPErrorType.UPDATE_MESSAGE_ERROR, BGPErrorType.ATTRIBUTE_LENGTH_ERROR,
parseFlags.getLength());
}
int len = parseFlags.isShort() ? parseFlags.getLength() +
Constants.TYPE_AND_LEN_AS_SHORT : parseFlags.getLength() + Constants.TYPE_AND_LEN_AS_BYTE;
ChannelBuffer data = tempCb.readBytes(len);
if (parseFlags.getFirstBit()) {
throw new BGPParseException(BGPErrorType.UPDATE_MESSAGE_ERROR, BGPErrorType.ATTRIBUTE_FLAGS_ERROR, data);
}
localPref = cb.readInt();
return new LocalPref(localPref);
}
@Override
public short getType() {
return LOCAL_PREF_TYPE;
}
@Override
public int hashCode() {
return Objects.hash(localPref);
}
@Override
public boolean equals(Object obj) {
if (this == obj) {
return true;
}
if (obj instanceof LocalPref) {
LocalPref other = (LocalPref) obj;
return Objects.equals(localPref, other.localPref);
}
return false;
}
@Override
public String toString() {
return MoreObjects.toStringHelper(getClass())
.add("localPref", localPref)
.toString();
}
@Override
public int write(ChannelBuffer cb) {
//Not to implement as of now
return 0;
}
}
|
