Priyanka B | 21f4b73 | 2016-03-21 20:54:12 +0530 | [diff] [blame] | 1 | /* |
Brian O'Connor | 5ab426f | 2016-04-09 01:19:45 -0700 | [diff] [blame] | 2 | * Copyright 2016-present Open Networking Laboratory |
Priyanka B | 21f4b73 | 2016-03-21 20:54:12 +0530 | [diff] [blame] | 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 | |
| 17 | package org.onosproject.pcepio.types; |
| 18 | |
| 19 | import java.util.Objects; |
| 20 | |
| 21 | import org.jboss.netty.buffer.ChannelBuffer; |
| 22 | import org.onosproject.pcepio.protocol.PcepVersion; |
| 23 | import org.slf4j.Logger; |
| 24 | import org.slf4j.LoggerFactory; |
| 25 | |
| 26 | import com.google.common.base.MoreObjects; |
| 27 | |
| 28 | /** |
| 29 | * Provides SR PCE Capability Tlv. |
| 30 | */ |
| 31 | public class SrPceCapabilityTlv implements PcepValueType { |
| 32 | |
| 33 | /* |
| 34 | * |
| 35 | reference : draft-ietf-pce-segment-routing-06, section 5.1.1 |
| 36 | |
| 37 | 0 1 2 3 |
| 38 | 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 |
| 39 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| 40 | | Type=TBD | Length=4 | |
| 41 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| 42 | | Reserved | Flags | MSD | |
| 43 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| 44 | fig: SR-PCE-CAPABILITY TLV format |
| 45 | */ |
| 46 | protected static final Logger log = LoggerFactory.getLogger(SrPceCapabilityTlv.class); |
| 47 | |
| 48 | public static final short TYPE = 26; |
| 49 | public static final short LENGTH = 4; |
| 50 | |
| 51 | private final byte msd; |
| 52 | |
| 53 | /** |
| 54 | * Constructor to initialize its parameter. |
| 55 | * |
| 56 | * @param msd maximum SID depth |
| 57 | */ |
| 58 | public SrPceCapabilityTlv(byte msd) { |
| 59 | this.msd = msd; |
| 60 | } |
| 61 | |
| 62 | /** |
| 63 | * Obtains newly created SrPceCapabilityTlv object. |
| 64 | * |
| 65 | * @param msd maximum SID depth |
| 66 | * @return object of SrPceCapabilityTlv |
| 67 | */ |
| 68 | public static SrPceCapabilityTlv of(final byte msd) { |
| 69 | return new SrPceCapabilityTlv(msd); |
| 70 | } |
| 71 | |
| 72 | /** |
| 73 | * Obtains msd. |
| 74 | * |
| 75 | * @return msd |
| 76 | */ |
| 77 | public byte msd() { |
| 78 | return msd; |
| 79 | } |
| 80 | |
| 81 | @Override |
| 82 | public PcepVersion getVersion() { |
| 83 | return PcepVersion.PCEP_1; |
| 84 | } |
| 85 | |
| 86 | @Override |
| 87 | public short getType() { |
| 88 | return TYPE; |
| 89 | } |
| 90 | |
| 91 | @Override |
| 92 | public short getLength() { |
| 93 | return LENGTH; |
| 94 | } |
| 95 | |
| 96 | @Override |
| 97 | public int hashCode() { |
| 98 | return Objects.hash(msd); |
| 99 | } |
| 100 | |
| 101 | @Override |
| 102 | public boolean equals(Object obj) { |
| 103 | if (this == obj) { |
| 104 | return true; |
| 105 | } |
| 106 | if (obj instanceof SrPceCapabilityTlv) { |
| 107 | SrPceCapabilityTlv other = (SrPceCapabilityTlv) obj; |
| 108 | return Objects.equals(msd, other.msd); |
| 109 | } |
| 110 | return false; |
| 111 | } |
| 112 | |
| 113 | @Override |
| 114 | public int write(ChannelBuffer c) { |
| 115 | int iLenStartIndex = c.writerIndex(); |
| 116 | c.writeShort(TYPE); |
| 117 | c.writeShort(LENGTH); |
| 118 | c.writeInt(msd); |
| 119 | return c.writerIndex() - iLenStartIndex; |
| 120 | } |
| 121 | |
| 122 | /** |
| 123 | * Reads the channel buffer and returns object of SrPceCapabilityTlv. |
| 124 | * |
| 125 | * @param cb channel buffer |
| 126 | * @return object of Gmpls-Capability-Tlv |
| 127 | */ |
| 128 | public static SrPceCapabilityTlv read(ChannelBuffer cb) { |
| 129 | //read reserved bits |
| 130 | cb.readShort(); |
| 131 | //read flags |
| 132 | cb.readByte(); |
| 133 | return SrPceCapabilityTlv.of(cb.readByte()); |
| 134 | } |
| 135 | |
| 136 | @Override |
| 137 | public String toString() { |
| 138 | return MoreObjects.toStringHelper(getClass()) |
| 139 | .add("Type", TYPE) |
| 140 | .add("Length", LENGTH) |
| 141 | .add("msd", msd) |
| 142 | .toString(); |
| 143 | } |
| 144 | } |