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[Emu][onos-2603] - Implement LinkState Link attributes-Prefix Attribute
Change-Id: I87884b14b22495bb4e8f716765d4bb634f5cb270
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1 | +/* | ||
2 | + * Copyright 2015 Open Networking Laboratory | ||
3 | + * | ||
4 | + * Licensed under the Apache License, Version 2.0 (the "License"); | ||
5 | + * you may not use this file except in compliance with the License. | ||
6 | + * You may obtain a copy of the License at | ||
7 | + * | ||
8 | + * http://www.apache.org/licenses/LICENSE-2.0 | ||
9 | + * | ||
10 | + * Unless required by applicable law or agreed to in writing, software | ||
11 | + * distributed under the License is distributed on an "AS IS" BASIS, | ||
12 | + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
13 | + * See the License for the specific language governing permissions and | ||
14 | + * limitations under the License. | ||
15 | + */ | ||
16 | +package org.onosproject.bgpio.types.attr; | ||
17 | + | ||
18 | +import java.util.Objects; | ||
19 | + | ||
20 | +import org.jboss.netty.buffer.ChannelBuffer; | ||
21 | +import org.onosproject.bgpio.exceptions.BGPParseException; | ||
22 | +import org.onosproject.bgpio.types.BGPErrorType; | ||
23 | +import org.onosproject.bgpio.types.BGPValueType; | ||
24 | +import org.onosproject.bgpio.util.Validation; | ||
25 | +import org.slf4j.Logger; | ||
26 | +import org.slf4j.LoggerFactory; | ||
27 | + | ||
28 | +import com.google.common.base.MoreObjects; | ||
29 | + | ||
30 | +/** | ||
31 | + * Implements BGP prefix metric attribute. | ||
32 | + */ | ||
33 | +public class BgpPrefixAttrMetric implements BGPValueType { | ||
34 | + | ||
35 | + protected static final Logger log = LoggerFactory | ||
36 | + .getLogger(BgpPrefixAttrMetric.class); | ||
37 | + | ||
38 | + public static final int ATTR_PREFIX_METRIC = 1155; | ||
39 | + public static final int ATTR_PREFIX_LEN = 4; | ||
40 | + | ||
41 | + /* TE Default Metric */ | ||
42 | + private final int linkPfxMetric; | ||
43 | + | ||
44 | + /** | ||
45 | + * Constructor to initialize value. | ||
46 | + * | ||
47 | + * @param linkPfxMetric Prefix Metric | ||
48 | + */ | ||
49 | + public BgpPrefixAttrMetric(int linkPfxMetric) { | ||
50 | + this.linkPfxMetric = linkPfxMetric; | ||
51 | + } | ||
52 | + | ||
53 | + /** | ||
54 | + * Returns object of this class with specified values. | ||
55 | + * | ||
56 | + * @param linkPfxMetric Prefix Metric | ||
57 | + * @return object of BgpPrefixAttrMetric | ||
58 | + */ | ||
59 | + public static BgpPrefixAttrMetric of(final int linkPfxMetric) { | ||
60 | + return new BgpPrefixAttrMetric(linkPfxMetric); | ||
61 | + } | ||
62 | + | ||
63 | + /** | ||
64 | + * Reads the Prefix Metric. | ||
65 | + * | ||
66 | + * @param cb ChannelBuffer | ||
67 | + * @return object of BgpPrefixAttrMetric | ||
68 | + * @throws BGPParseException while parsing BgpPrefixAttrMetric | ||
69 | + */ | ||
70 | + public static BgpPrefixAttrMetric read(ChannelBuffer cb) | ||
71 | + throws BGPParseException { | ||
72 | + int linkPfxMetric; | ||
73 | + | ||
74 | + short lsAttrLength = cb.readShort(); // 4 Bytes | ||
75 | + | ||
76 | + if ((lsAttrLength != ATTR_PREFIX_LEN) | ||
77 | + || (cb.readableBytes() < lsAttrLength)) { | ||
78 | + Validation.validateLen(BGPErrorType.UPDATE_MESSAGE_ERROR, | ||
79 | + BGPErrorType.ATTRIBUTE_LENGTH_ERROR, | ||
80 | + lsAttrLength); | ||
81 | + } | ||
82 | + | ||
83 | + linkPfxMetric = cb.readInt(); | ||
84 | + | ||
85 | + return BgpPrefixAttrMetric.of(linkPfxMetric); | ||
86 | + } | ||
87 | + | ||
88 | + /** | ||
89 | + * Returns the Prefix Metric. | ||
90 | + * | ||
91 | + * @return Prefix Metric | ||
92 | + */ | ||
93 | + public int attrPfxMetric() { | ||
94 | + return linkPfxMetric; | ||
95 | + } | ||
96 | + | ||
97 | + @Override | ||
98 | + public short getType() { | ||
99 | + return ATTR_PREFIX_METRIC; | ||
100 | + } | ||
101 | + | ||
102 | + @Override | ||
103 | + public int hashCode() { | ||
104 | + return Objects.hash(linkPfxMetric); | ||
105 | + } | ||
106 | + | ||
107 | + @Override | ||
108 | + public boolean equals(Object obj) { | ||
109 | + if (this == obj) { | ||
110 | + return true; | ||
111 | + } | ||
112 | + | ||
113 | + if (obj instanceof BgpPrefixAttrMetric) { | ||
114 | + BgpPrefixAttrMetric other = (BgpPrefixAttrMetric) obj; | ||
115 | + return Objects.equals(linkPfxMetric, other.linkPfxMetric); | ||
116 | + } | ||
117 | + return false; | ||
118 | + } | ||
119 | + | ||
120 | + @Override | ||
121 | + public int write(ChannelBuffer cb) { | ||
122 | + // TODO This will be implemented in the next version | ||
123 | + return 0; | ||
124 | + } | ||
125 | + | ||
126 | + @Override | ||
127 | + public String toString() { | ||
128 | + return MoreObjects.toStringHelper(getClass()) | ||
129 | + .add("linkPfxMetric", linkPfxMetric).toString(); | ||
130 | + } | ||
131 | +} |
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