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[Emu][onos-2603] - Implement LinkState Link attributes
Change-Id: I452675ab9e3cf884924212b7114659dfc9118ef3
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bgp/bgpio/src/main/java/org/onosproject/bgpio/types/attr/BgpLinkAttrUnRsrvdLinkBandwidth.java
0 → 100644
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.Arrays; | ||
19 | +import java.util.Objects; | ||
20 | + | ||
21 | +import org.jboss.netty.buffer.ChannelBuffer; | ||
22 | +import org.onosproject.bgpio.exceptions.BGPParseException; | ||
23 | +import org.onosproject.bgpio.types.BGPErrorType; | ||
24 | +import org.onosproject.bgpio.types.BGPValueType; | ||
25 | +import org.onosproject.bgpio.util.Validation; | ||
26 | +import org.slf4j.Logger; | ||
27 | +import org.slf4j.LoggerFactory; | ||
28 | + | ||
29 | +import com.google.common.base.MoreObjects; | ||
30 | + | ||
31 | +/** | ||
32 | + * Implements BGP unreserved bandwidth attribute. | ||
33 | + */ | ||
34 | +public class BgpLinkAttrUnRsrvdLinkBandwidth implements BGPValueType { | ||
35 | + | ||
36 | + protected static final Logger log = LoggerFactory | ||
37 | + .getLogger(BgpLinkAttrUnRsrvdLinkBandwidth.class); | ||
38 | + | ||
39 | + public static final int MAX_BANDWIDTH_LEN = 4; | ||
40 | + public static final int NO_OF_BITS = 8; | ||
41 | + public static final int NO_OF_PRIORITY = 8; | ||
42 | + | ||
43 | + public short sType; | ||
44 | + | ||
45 | + /* ISIS administrative group */ | ||
46 | + private float[] maxUnResBandwidth; | ||
47 | + | ||
48 | + /** | ||
49 | + * Constructor to initialize the values. | ||
50 | + * | ||
51 | + * @param maxUnResBandwidth Maximum Unreserved bandwidth | ||
52 | + * @param sType returns the tag value | ||
53 | + */ | ||
54 | + BgpLinkAttrUnRsrvdLinkBandwidth(float[] maxUnResBandwidth, short sType) { | ||
55 | + this.maxUnResBandwidth = Arrays.copyOf(maxUnResBandwidth, | ||
56 | + maxUnResBandwidth.length); | ||
57 | + this.sType = sType; | ||
58 | + } | ||
59 | + | ||
60 | + /** | ||
61 | + * Reads the BGP link attributes of Maximum link bandwidth. | ||
62 | + * | ||
63 | + * @param cb Channel buffer | ||
64 | + * @return object of type BgpLinkAttrMaxLinkBandwidth | ||
65 | + * @throws BGPParseException while parsing BgpLinkAttrMaxLinkBandwidth | ||
66 | + */ | ||
67 | + public static BgpLinkAttrUnRsrvdLinkBandwidth read(ChannelBuffer cb, | ||
68 | + short sType) | ||
69 | + throws BGPParseException { | ||
70 | + float[] maxUnResBandwidth; | ||
71 | + short lsAttrLength = cb.readShort(); | ||
72 | + | ||
73 | + if ((lsAttrLength != MAX_BANDWIDTH_LEN * NO_OF_PRIORITY) | ||
74 | + || (cb.readableBytes() < lsAttrLength)) { | ||
75 | + Validation.validateLen(BGPErrorType.UPDATE_MESSAGE_ERROR, | ||
76 | + BGPErrorType.ATTRIBUTE_LENGTH_ERROR, | ||
77 | + lsAttrLength); | ||
78 | + } | ||
79 | + | ||
80 | + maxUnResBandwidth = new float[NO_OF_PRIORITY]; | ||
81 | + for (int i = 0; i < NO_OF_PRIORITY; i++) { | ||
82 | + maxUnResBandwidth[i] = ieeeToFloatRead(cb.readInt()) * NO_OF_BITS; | ||
83 | + } | ||
84 | + | ||
85 | + return new BgpLinkAttrUnRsrvdLinkBandwidth(maxUnResBandwidth, sType); | ||
86 | + } | ||
87 | + | ||
88 | + /** | ||
89 | + * Returns maximum unreserved bandwidth. | ||
90 | + * | ||
91 | + * @return unreserved bandwidth. | ||
92 | + */ | ||
93 | + float[] getLinkAttrUnRsrvdLinkBandwidth() { | ||
94 | + return maxUnResBandwidth; | ||
95 | + } | ||
96 | + | ||
97 | + /** | ||
98 | + * Parse the IEEE floating point notation and returns it in normal float. | ||
99 | + * | ||
100 | + * @param iVal IEEE floating point number | ||
101 | + * @return normal float | ||
102 | + */ | ||
103 | + static float ieeeToFloatRead(int iVal) { | ||
104 | + iVal = (((iVal & 0xFF) << 24) | ((iVal & 0xFF00) << 8) | ||
105 | + | ((iVal & 0xFF0000) >> 8) | ((iVal >> 24) & 0xFF)); | ||
106 | + | ||
107 | + return Float.intBitsToFloat(iVal); | ||
108 | + } | ||
109 | + | ||
110 | + @Override | ||
111 | + public short getType() { | ||
112 | + return this.sType; | ||
113 | + } | ||
114 | + | ||
115 | + @Override | ||
116 | + public int hashCode() { | ||
117 | + return Objects.hash(maxUnResBandwidth); | ||
118 | + } | ||
119 | + | ||
120 | + @Override | ||
121 | + public boolean equals(Object obj) { | ||
122 | + if (this == obj) { | ||
123 | + return true; | ||
124 | + } | ||
125 | + | ||
126 | + if (obj instanceof BgpLinkAttrUnRsrvdLinkBandwidth) { | ||
127 | + BgpLinkAttrUnRsrvdLinkBandwidth other = (BgpLinkAttrUnRsrvdLinkBandwidth) obj; | ||
128 | + return Objects.equals(maxUnResBandwidth, other.maxUnResBandwidth); | ||
129 | + } | ||
130 | + return false; | ||
131 | + } | ||
132 | + | ||
133 | + @Override | ||
134 | + public int write(ChannelBuffer cb) { | ||
135 | + // TODO This will be implemented in the next version | ||
136 | + return 0; | ||
137 | + } | ||
138 | + | ||
139 | + @Override | ||
140 | + public String toString() { | ||
141 | + return MoreObjects.toStringHelper(getClass()).omitNullValues() | ||
142 | + .add("maxUnResBandwidth", maxUnResBandwidth).toString(); | ||
143 | + } | ||
144 | +} |
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