tejeshwer degala | 3fe1ed5 | 2016-04-22 17:04:01 +0530 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2016-present 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.isis.io.isispacket.tlv; |
| 17 | |
| 18 | import com.google.common.base.MoreObjects; |
| 19 | import com.google.common.primitives.Bytes; |
| 20 | import org.jboss.netty.buffer.ChannelBuffer; |
| 21 | import org.onosproject.isis.io.isispacket.tlv.subtlv.SubTlvFinder; |
| 22 | import org.onosproject.isis.io.isispacket.tlv.subtlv.SubTlvToBytes; |
| 23 | import org.onosproject.isis.io.isispacket.tlv.subtlv.SubTlvType; |
| 24 | import org.onosproject.isis.io.isispacket.tlv.subtlv.TrafficEngineeringSubTlv; |
| 25 | import org.onosproject.isis.io.util.IsisUtil; |
| 26 | |
| 27 | import java.util.ArrayList; |
| 28 | import java.util.List; |
| 29 | |
| 30 | /** |
| 31 | * Representation of IS extended reachability TLV. |
| 32 | */ |
| 33 | public class IsExtendedReachability extends TlvHeader implements IsisTlv { |
| 34 | |
| 35 | private String neighborId; |
| 36 | private int metric; |
| 37 | private List<TrafficEngineeringSubTlv> trafEnginSubTlv = new ArrayList<>(); |
| 38 | |
| 39 | /** |
| 40 | * Creates an instance of IP external reachability TLV. |
| 41 | * |
| 42 | * @param tlvHeader TLV header |
| 43 | */ |
| 44 | public IsExtendedReachability(TlvHeader tlvHeader) { |
| 45 | this.setTlvType(tlvHeader.tlvType()); |
| 46 | this.setTlvLength(tlvHeader.tlvLength()); |
| 47 | } |
| 48 | |
| 49 | /** |
| 50 | * Returns neighbor ID. |
| 51 | * |
| 52 | * @return neighbor ID |
| 53 | */ |
| 54 | public String neighborId() { |
| 55 | return neighborId; |
| 56 | } |
| 57 | |
| 58 | /** |
| 59 | * Sets neighbor ID. |
| 60 | * |
| 61 | * @param neighborId neighbor ID |
| 62 | */ |
| 63 | public void setNeighborId(String neighborId) { |
| 64 | this.neighborId = neighborId; |
| 65 | } |
| 66 | |
| 67 | /** |
| 68 | * Returns metric. |
| 69 | * |
| 70 | * @return metric |
| 71 | */ |
| 72 | public int metric() { |
| 73 | return metric; |
| 74 | } |
| 75 | |
| 76 | /** |
| 77 | * Sets metric. |
| 78 | * |
| 79 | * @param metric metric |
| 80 | */ |
| 81 | public void setMetric(int metric) { |
| 82 | this.metric = metric; |
| 83 | } |
| 84 | |
| 85 | /** |
| 86 | * Adds the traffic engineering sub TLV to IS extended reachability TLV. |
| 87 | * |
| 88 | * @param trafEnginSubTlv traffic engineering sub TLV |
| 89 | */ |
| 90 | public void addSubTlv(TrafficEngineeringSubTlv trafEnginSubTlv) { |
| 91 | this.trafEnginSubTlv.add(trafEnginSubTlv); |
| 92 | } |
| 93 | |
| 94 | @Override |
| 95 | public void readFrom(ChannelBuffer channelBuffer) { |
| 96 | byte[] tempByteArray = new byte[IsisUtil.ID_SIX_BYTES]; |
| 97 | channelBuffer.readBytes(tempByteArray, 0, IsisUtil.ID_SIX_BYTES); |
| 98 | this.setNeighborId(IsisUtil.systemId(tempByteArray)); |
| 99 | this.setMetric(channelBuffer.readUnsignedMedium()); |
| 100 | while (channelBuffer.readableBytes() > 0) { |
| 101 | TlvHeader tlvHeader = new TlvHeader(); |
| 102 | tlvHeader.setTlvType(channelBuffer.readByte()); |
| 103 | tlvHeader.setTlvLength(channelBuffer.readByte()); |
| 104 | SubTlvType tlvValue = SubTlvType.get(tlvHeader.tlvType()); |
| 105 | if (tlvValue != null) { |
| 106 | this.addSubTlv(SubTlvFinder.findSubTlv(tlvHeader, |
| 107 | channelBuffer.readBytes(tlvHeader.tlvLength()))); |
| 108 | } else { |
| 109 | channelBuffer.readBytes(tlvHeader.tlvLength()); |
| 110 | } |
| 111 | } |
| 112 | } |
| 113 | |
| 114 | @Override |
| 115 | public byte[] asBytes() { |
| 116 | byte[] bytes = null; |
| 117 | byte[] tlvHeader = tlvHeaderAsByteArray(); |
| 118 | byte[] tlvBody = tlvBodyAsBytes(); |
| 119 | tlvHeader[1] = (byte) tlvBody.length; |
| 120 | bytes = Bytes.concat(tlvHeader, tlvBody); |
| 121 | return bytes; |
| 122 | } |
| 123 | |
| 124 | /** |
| 125 | * Returns TLV body of IS extended reachability TLV. |
| 126 | * |
| 127 | * @return byteArray TLV body of IS extended reachability TLV. |
| 128 | */ |
| 129 | private byte[] tlvBodyAsBytes() { |
| 130 | List<Byte> byteList = new ArrayList<>(); |
| 131 | byteList.addAll(IsisUtil.sourceAndLanIdToBytes(this.neighborId())); |
| 132 | byteList.addAll(Bytes.asList(IsisUtil.convertToThreeBytes(this.metric()))); |
| 133 | if (this.trafEnginSubTlv.size() > 0) { |
| 134 | for (TrafficEngineeringSubTlv trafficEngineeringSubTlv : this.trafEnginSubTlv) { |
| 135 | byteList.addAll(SubTlvToBytes.tlvToBytes(trafficEngineeringSubTlv)); |
| 136 | } |
| 137 | } |
| 138 | return Bytes.toArray(byteList); |
| 139 | } |
| 140 | |
| 141 | @Override |
| 142 | public String toString() { |
| 143 | return MoreObjects.toStringHelper(getClass()) |
| 144 | .omitNullValues() |
| 145 | .add("neighborId", neighborId) |
| 146 | .add("metric", metric) |
| 147 | .add("trafEnginSubTlv", trafEnginSubTlv) |
| 148 | .toString(); |
| 149 | } |
| 150 | |
| 151 | } |