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
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
|
/*
* 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.pcepio.types;
import org.jboss.netty.buffer.ChannelBuffer;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.google.common.base.MoreObjects;
/**
* Provides PCEP Object Header which is common for all the objects.
* Reference : RFC 5440.
*/
public class PcepObjectHeader {
/*
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Object-Class | OT |Res|P|I| Object Length (bytes) |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| |
// (Object body) //
| |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
PCEP Common Object Header
*/
protected static final Logger log = LoggerFactory.getLogger(PcepObjectHeader.class);
public static final boolean REQ_OBJ_MUST_PROCESS = true;
public static final boolean REQ_OBJ_OPTIONAL_PROCESS = false;
public static final boolean RSP_OBJ_IGNORED = true;
public static final boolean RSP_OBJ_PROCESSED = false;
public static final int OBJECT_TYPE_SHIFT_VALUE = 4;
public static final byte PFLAG_SET = 0x02;
public static final byte IFLAG_SET = 0x01;
public static final int SET = 1;
private byte objClass;
private byte objType;
private boolean bPFlag;
private boolean bIFlag;
private short objLen;
/**
* Constructor to initialize all the variables in object header.
*
* @param objClass PCEP Object class
* @param objType PCEP Object type
* @param bPFlag P flag
* @param bIFlag I flag
* @param objLen PCEP object length
*/
public PcepObjectHeader(byte objClass, byte objType, boolean bPFlag, boolean bIFlag, short objLen) {
this.objClass = objClass;
this.objType = objType;
this.bPFlag = bPFlag;
this.bIFlag = bIFlag;
this.objLen = objLen;
}
/**
* Sets the Object class.
*
* @param value object class
*/
public void setObjClass(byte value) {
this.objClass = value;
}
/**
* Sets the Object TYPE.
*
* @param value object type
*/
public void setObjType(byte value) {
this.objType = value;
}
/**
* Sets the Object P flag.
*
* @param value p flag
*/
public void setPFlag(boolean value) {
this.bPFlag = value;
}
/**
* Sets the Object I flag.
*
* @param value I flag
*/
public void setIFlag(boolean value) {
this.bIFlag = value;
}
/**
* Sets the Object Length.
*
* @param value object length
*/
public void setObjLen(short value) {
this.objLen = value;
}
/**
* Returns Object's P flag.
*
* @return bPFlag P flag
*/
public boolean getPFlag() {
return this.bPFlag;
}
/**
* Returns Object's i flag.
*
* @return bIFlag I flag
*/
public boolean getIFlag() {
return this.bIFlag;
}
/**
* Returns Object Length.
*
* @return objLen object length
*/
public short getObjLen() {
return this.objLen;
}
/**
* Returns Object class.
*
* @return objClass object class
*/
public byte getObjClass() {
return this.objClass;
}
/**
* Returns Object Type.
*
* @return objType object type
*/
public byte getObjType() {
return this.objType;
}
/**
* Writes Byte stream of PCEP object header to channel buffer.
*
* @param cb output channel buffer
* @return objLenIndex object length index in channel buffer
*/
public int write(ChannelBuffer cb) {
cb.writeByte(this.objClass);
byte temp = (byte) (this.objType << OBJECT_TYPE_SHIFT_VALUE);
if (this.bPFlag) {
temp = (byte) (temp | PFLAG_SET);
}
if (this.bIFlag) {
temp = (byte) (temp | IFLAG_SET);
}
cb.writeByte(temp);
int objLenIndex = cb.writerIndex();
cb.writeShort((short) 0);
return objLenIndex;
}
/**
* Read from channel buffer and Returns PCEP Objects header.
*
* @param cb of type channel buffer
* @return PCEP Object header
*/
public static PcepObjectHeader read(ChannelBuffer cb) {
byte objClass;
byte objType;
boolean bPFlag;
boolean bIFlag;
short objLen;
objClass = cb.readByte();
byte temp = cb.readByte();
bIFlag = (temp & IFLAG_SET) == IFLAG_SET;
bPFlag = (temp & PFLAG_SET) == PFLAG_SET;
objType = (byte) (temp >> OBJECT_TYPE_SHIFT_VALUE);
objLen = cb.readShort();
return new PcepObjectHeader(objClass, objType, bPFlag, bIFlag, objLen);
}
@Override
public String toString() {
return MoreObjects.toStringHelper(getClass())
.add("ObjectClass", objClass)
.add("ObjectType", objType)
.add("ObjectLength", objLen)
.add("PFlag", (bPFlag) ? 1 : 0)
.add("IFlag", (bIFlag) ? 1 : 0)
.toString();
}
}
|
