Dhruv Dhody | e64b93e | 2016-04-20 19:26:55 +0530 | [diff] [blame] | 1 | /* |
Brian O'Connor | a09fe5b | 2017-08-03 21:12:30 -0700 | [diff] [blame] | 2 | * Copyright 2016-present Open Networking Foundation |
Dhruv Dhody | e64b93e | 2016-04-20 19:26:55 +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 | package org.onosproject.isis.io.isispacket.pdu; |
| 17 | |
| 18 | import com.google.common.base.MoreObjects; |
| 19 | import com.google.common.base.Objects; |
| 20 | import com.google.common.primitives.Bytes; |
| 21 | import org.jboss.netty.buffer.ChannelBuffer; |
| 22 | import org.onosproject.isis.io.isispacket.IsisHeader; |
| 23 | import org.onosproject.isis.io.isispacket.tlv.IsisTlv; |
| 24 | import org.onosproject.isis.io.isispacket.tlv.TlvFinder; |
| 25 | import org.onosproject.isis.io.isispacket.tlv.TlvHeader; |
| 26 | import org.onosproject.isis.io.isispacket.tlv.TlvType; |
| 27 | import org.onosproject.isis.io.isispacket.tlv.TlvsToBytes; |
| 28 | import org.onosproject.isis.io.util.IsisUtil; |
| 29 | |
| 30 | import java.util.ArrayList; |
| 31 | import java.util.List; |
| 32 | |
| 33 | /** |
| 34 | * Representation of partial sequence number PDU. |
| 35 | */ |
| 36 | public class Psnp extends IsisHeader { |
| 37 | /* |
| 38 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| 39 | | Intradomain Routing Protocol Discriminator | |
| 40 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| 41 | | Length Indicator | |
| 42 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| 43 | | Version/Protocol ID Extension | |
| 44 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| 45 | | ID Length | |
| 46 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| 47 | | R | R | R | PDU Type | |
| 48 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| 49 | | Version | |
| 50 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| 51 | | Reserved | |
| 52 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| 53 | | Maximum area address | |
| 54 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| 55 | | PDU Length | |
| 56 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| 57 | | Source ID | |
| 58 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| 59 | | Start LSP ID | |
| 60 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| 61 | | End LSP ID | |
| 62 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| 63 | | Variable Lengths Fields | |
| 64 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| 65 | |
| 66 | Hello Message Format |
| 67 | REFERENCE : ISO/IECĀ 10589 |
| 68 | */ |
| 69 | private int pduLength; |
| 70 | private String sourceId; |
| 71 | private List<IsisTlv> variableLengths = new ArrayList<>(); |
| 72 | |
| 73 | /** |
| 74 | * Creates the instance for this class. |
| 75 | * |
| 76 | * @param isisHeader ISIS header |
| 77 | */ |
| 78 | public Psnp(IsisHeader isisHeader) { |
| 79 | populateHeader(isisHeader); |
| 80 | } |
| 81 | |
nicklesh adlakha | 90bfa6a | 2016-04-28 20:38:33 +0530 | [diff] [blame] | 82 | /** |
| 83 | * Adds the TLV to list. |
| 84 | * |
| 85 | * @param isisTlv ISIS TLV instance |
| 86 | */ |
Dhruv Dhody | e64b93e | 2016-04-20 19:26:55 +0530 | [diff] [blame] | 87 | public void addTlv(IsisTlv isisTlv) { |
| 88 | variableLengths.add(isisTlv); |
| 89 | } |
| 90 | |
| 91 | /** |
nicklesh adlakha | 90bfa6a | 2016-04-28 20:38:33 +0530 | [diff] [blame] | 92 | * Returns the list of all tlvs. |
| 93 | * |
| 94 | * @return variableLengths list of tlvs |
| 95 | */ |
| 96 | public List<IsisTlv> getAllTlv() { |
| 97 | return variableLengths; |
| 98 | } |
| 99 | |
| 100 | /** |
Dhruv Dhody | e64b93e | 2016-04-20 19:26:55 +0530 | [diff] [blame] | 101 | * Returns the source ID of csnp. |
| 102 | * |
| 103 | * @return sourceId source ID |
| 104 | */ |
| 105 | public String sourceId() { |
| 106 | return sourceId; |
| 107 | } |
| 108 | |
| 109 | /** |
| 110 | * Sets the source ID for csnp. |
| 111 | * |
| 112 | * @param sourceId source ID |
| 113 | */ |
| 114 | public void setSourceId(String sourceId) { |
| 115 | this.sourceId = sourceId; |
| 116 | } |
| 117 | |
| 118 | /** |
| 119 | * Returns the packet data unit length of link state packet. |
| 120 | * Entire length of this PDU, in octets |
| 121 | * |
| 122 | * @return pduLength packte date unit length |
| 123 | */ |
| 124 | public int pduLength() { |
| 125 | return pduLength; |
| 126 | } |
| 127 | |
| 128 | /** |
| 129 | * Sets the packet data unit length for link state packet. |
| 130 | * Entire Length of this PDU, in octets |
| 131 | * |
| 132 | * @param pduLength packte data length |
| 133 | */ |
| 134 | public void setPduLength(int pduLength) { |
| 135 | this.pduLength = pduLength; |
| 136 | } |
| 137 | |
| 138 | @Override |
| 139 | public void readFrom(ChannelBuffer channelBuffer) { |
| 140 | this.setPduLength(channelBuffer.readUnsignedShort()); |
| 141 | //source id + 2 value |
| 142 | byte[] tempByteArray = new byte[IsisUtil.ID_PLUS_ONE_BYTE]; |
| 143 | channelBuffer.readBytes(tempByteArray, 0, IsisUtil.ID_PLUS_ONE_BYTE); |
| 144 | this.setSourceId(IsisUtil.systemIdPlus(tempByteArray)); |
| 145 | //tlv here |
| 146 | while (channelBuffer.readableBytes() > 0) { |
| 147 | TlvHeader tlvHeader = new TlvHeader(); |
| 148 | tlvHeader.setTlvType(channelBuffer.readUnsignedByte()); |
| 149 | tlvHeader.setTlvLength(channelBuffer.readUnsignedByte()); |
| 150 | TlvType tlvValue = TlvType.get(tlvHeader.tlvType()); |
| 151 | if (tlvValue != null) { |
| 152 | IsisTlv tlv = TlvFinder.findTlv(tlvHeader, channelBuffer.readBytes(tlvHeader.tlvLength())); |
nicklesh adlakha | 90bfa6a | 2016-04-28 20:38:33 +0530 | [diff] [blame] | 153 | if (tlv != null) { |
| 154 | this.variableLengths.add(tlv); |
| 155 | } |
Dhruv Dhody | e64b93e | 2016-04-20 19:26:55 +0530 | [diff] [blame] | 156 | } else { |
| 157 | channelBuffer.readBytes(tlvHeader.tlvLength()); |
| 158 | } |
| 159 | } |
| 160 | } |
| 161 | |
| 162 | |
| 163 | @Override |
| 164 | public byte[] asBytes() { |
| 165 | byte[] psnpMessage = null; |
| 166 | byte[] isisPduHeader = isisPduHeader(); |
| 167 | byte[] psnpBody = partialSequenceNumberPduBody(); |
| 168 | psnpMessage = Bytes.concat(isisPduHeader, psnpBody); |
| 169 | return psnpMessage; |
| 170 | } |
| 171 | |
| 172 | /** |
| 173 | * Builds the ISIS PDU header. |
| 174 | * |
| 175 | * @return headerList ISIS PDU header |
| 176 | */ |
| 177 | public byte[] isisPduHeader() { |
| 178 | List<Byte> headerList = new ArrayList<>(); |
| 179 | headerList.add(this.irpDiscriminator()); |
| 180 | headerList.add((byte) IsisUtil.getPduHeaderLength(this.pduType())); |
| 181 | headerList.add(this.version()); |
| 182 | headerList.add(this.idLength()); |
| 183 | headerList.add((byte) this.pduType()); |
| 184 | headerList.add(this.version2()); |
| 185 | headerList.add(this.reserved()); |
| 186 | headerList.add(this.maximumAreaAddresses()); |
| 187 | return Bytes.toArray(headerList); |
| 188 | } |
| 189 | |
| 190 | /** |
| 191 | * Builds the partial sequence number PDU body. |
| 192 | * |
| 193 | * @return bodyList partial sequence number PDU body |
| 194 | */ |
| 195 | public byte[] partialSequenceNumberPduBody() { |
| 196 | List<Byte> bodyList = new ArrayList<>(); |
| 197 | bodyList.addAll(Bytes.asList(IsisUtil.convertToTwoBytes(this.pduLength()))); |
| 198 | bodyList.addAll(IsisUtil.sourceAndLanIdToBytes(this.sourceId())); |
| 199 | for (IsisTlv isisTlv : variableLengths) { |
| 200 | bodyList.addAll(TlvsToBytes.tlvToBytes(isisTlv)); |
| 201 | } |
| 202 | return Bytes.toArray(bodyList); |
| 203 | } |
| 204 | |
| 205 | @Override |
| 206 | public String toString() { |
| 207 | return MoreObjects.toStringHelper(getClass()) |
| 208 | .omitNullValues() |
| 209 | .add("pduLength", pduLength) |
| 210 | .add("sourceId", sourceId) |
| 211 | .toString(); |
| 212 | } |
| 213 | |
| 214 | @Override |
| 215 | public boolean equals(Object o) { |
| 216 | if (this == o) { |
| 217 | return true; |
| 218 | } |
| 219 | if (o == null || getClass() != o.getClass()) { |
| 220 | return false; |
| 221 | } |
| 222 | Psnp that = (Psnp) o; |
| 223 | return Objects.equal(pduLength, that.pduLength); |
| 224 | } |
| 225 | |
| 226 | @Override |
| 227 | public int hashCode() { |
| 228 | return Objects.hashCode(sourceId, pduLength); |
| 229 | } |
| 230 | } |