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
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
|
/*
* 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.attr;
import java.util.Objects;
import org.jboss.netty.buffer.ChannelBuffer;
import org.onosproject.bgpio.exceptions.BGPParseException;
import org.onosproject.bgpio.types.BGPErrorType;
import org.onosproject.bgpio.types.BGPValueType;
import org.onosproject.bgpio.util.Validation;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.google.common.base.MoreObjects;
/**
* Implements BGP attribute node flag.
*/
public class BgpAttrNodeFlagBitTlv implements BGPValueType {
protected static final Logger log = LoggerFactory
.getLogger(BgpAttrNodeFlagBitTlv.class);
public static final int ATTRNODE_FLAGBIT = 1024;
/* Node flag bit TLV */
private boolean bOverloadBit;
private boolean bAttachedBit;
private boolean bExternalBit;
private boolean bABRBit;
public static final int BIT_SET = 1;
public static final int FIRST_BIT = 0x80;
public static final int SECOND_BIT = 0x40;
public static final int THIRD_BIT = 0x20;
public static final int FOURTH_BIT = 0x01;
/**
* Constructor to initialize parameters.
*
* @param bOverloadBit Overload bit
* @param bAttachedBit Attached bit
* @param bExternalBit External bit
* @param bABRBit ABR Bit
*/
BgpAttrNodeFlagBitTlv(boolean bOverloadBit, boolean bAttachedBit,
boolean bExternalBit, boolean bABRBit) {
this.bOverloadBit = bOverloadBit;
this.bAttachedBit = bAttachedBit;
this.bExternalBit = bExternalBit;
this.bABRBit = bABRBit;
}
/**
* Reads the Node Flag Bits.
*
* @param cb ChannelBuffer
* @return attribute node flag bit tlv
* @throws BGPParseException while parsing BgpAttrNodeFlagBitTlv
*/
public static BgpAttrNodeFlagBitTlv read(ChannelBuffer cb)
throws BGPParseException {
boolean bOverloadBit = false;
boolean bAttachedBit = false;
boolean bExternalBit = false;
boolean bABRBit = false;
short lsAttrLength = cb.readShort();
if (lsAttrLength != 1) {
Validation.validateLen(BGPErrorType.UPDATE_MESSAGE_ERROR,
BGPErrorType.ATTRIBUTE_LENGTH_ERROR,
lsAttrLength);
}
byte nodeFlagBits = cb.readByte();
bOverloadBit = ((nodeFlagBits & (byte) FIRST_BIT) == FIRST_BIT);
bAttachedBit = ((nodeFlagBits & (byte) SECOND_BIT) == SECOND_BIT);
bExternalBit = ((nodeFlagBits & (byte) THIRD_BIT) == THIRD_BIT);
bABRBit = ((nodeFlagBits & (byte) FOURTH_BIT) == FOURTH_BIT);
return new BgpAttrNodeFlagBitTlv(bOverloadBit, bAttachedBit,
bExternalBit, bABRBit);
}
/**
* Returns Overload Bit.
*
* @return Overload Bit
*/
boolean getOverLoadBit() {
return bOverloadBit;
}
/**
* Returns Attached Bit.
*
* @return Attached Bit
*/
boolean getAttachedBit() {
return bAttachedBit;
}
/**
* Returns External Bit.
*
* @return External Bit
*/
boolean getExternalBit() {
return bExternalBit;
}
/**
* Returns ABR Bit.
*
* @return ABR Bit
*/
boolean getABRBit() {
return bABRBit;
}
@Override
public short getType() {
return ATTRNODE_FLAGBIT;
}
@Override
public int write(ChannelBuffer cb) {
// TODO will be implementing it later
return 0;
}
@Override
public int hashCode() {
return Objects.hash(bOverloadBit, bAttachedBit, bExternalBit, bABRBit);
}
@Override
public boolean equals(Object obj) {
if (this == obj) {
return true;
}
if (obj instanceof BgpAttrNodeFlagBitTlv) {
BgpAttrNodeFlagBitTlv other = (BgpAttrNodeFlagBitTlv) obj;
return Objects.equals(bOverloadBit, other.bOverloadBit)
&& Objects.equals(bAttachedBit, other.bAttachedBit)
&& Objects.equals(bExternalBit, other.bExternalBit)
&& Objects.equals(bABRBit, other.bABRBit);
}
return false;
}
@Override
public String toString() {
return MoreObjects.toStringHelper(getClass())
.add("bOverloadBit", bOverloadBit)
.add("bAttachedBit", bAttachedBit)
.add("bExternalBit", bExternalBit).add("bABRBit", bABRBit)
.toString();
}
}
|
