Charles M.C. Chan | 93b7fb0 | 2014-12-28 03:59:36 +0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2014 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 | |
| 17 | |
| 18 | |
| 19 | package org.onlab.packet; |
| 20 | |
| 21 | import java.nio.ByteBuffer; |
| 22 | import java.util.Arrays; |
| 23 | import java.util.HashMap; |
| 24 | import java.util.Map; |
| 25 | |
| 26 | /** |
| 27 | * |
| 28 | */ |
| 29 | public class IPv6 extends BasePacket { |
| 30 | public static final byte FIXED_HEADER_LENGTH = 40; // bytes |
| 31 | |
| 32 | // TODO: Implement extension header. |
| 33 | public static final byte PROTOCOL_TCP = 0x6; |
| 34 | public static final byte PROTOCOL_UDP = 0x11; |
| 35 | public static final byte PROTOCOL_ICMP6 = 0x3A; |
| 36 | public static final Map<Byte, Class<? extends IPacket>> PROTOCOL_CLASS_MAP = |
| 37 | new HashMap<>(); |
| 38 | |
| 39 | static { |
| 40 | IPv6.PROTOCOL_CLASS_MAP.put(IPv6.PROTOCOL_ICMP6, ICMP6.class); |
| 41 | IPv6.PROTOCOL_CLASS_MAP.put(IPv6.PROTOCOL_TCP, TCP.class); |
| 42 | IPv6.PROTOCOL_CLASS_MAP.put(IPv6.PROTOCOL_UDP, UDP.class); |
| 43 | } |
| 44 | |
| 45 | protected byte version; |
| 46 | protected byte diffServ; |
| 47 | protected int flowLabel; |
| 48 | protected short payloadLength; |
| 49 | protected byte nextHeader; |
| 50 | protected byte hopLimit; |
| 51 | protected byte[] sourceAddress = new byte[Ip6Address.BYTE_LENGTH]; |
| 52 | protected byte[] destinationAddress = new byte[Ip6Address.BYTE_LENGTH]; |
| 53 | |
| 54 | /** |
| 55 | * Default constructor that sets the version to 4. |
| 56 | */ |
| 57 | public IPv6() { |
| 58 | super(); |
| 59 | this.version = 6; |
| 60 | } |
| 61 | |
| 62 | /** |
| 63 | * @return the version |
| 64 | */ |
| 65 | public byte getVersion() { |
| 66 | return this.version; |
| 67 | } |
| 68 | |
| 69 | /** |
| 70 | * @param version |
| 71 | * the version to set |
| 72 | * @return this |
| 73 | */ |
| 74 | public IPv6 setVersion(final byte version) { |
| 75 | this.version = version; |
| 76 | return this; |
| 77 | } |
| 78 | |
| 79 | /** |
| 80 | * @return the diffServ |
| 81 | */ |
| 82 | public byte getDiffServ() { |
| 83 | return this.diffServ; |
| 84 | } |
| 85 | |
| 86 | /** |
| 87 | * @param diffServ |
| 88 | * the diffServ to set |
| 89 | * @return this |
| 90 | */ |
| 91 | public IPv6 setDiffServ(final byte diffServ) { |
| 92 | this.diffServ = diffServ; |
| 93 | return this; |
| 94 | } |
| 95 | |
| 96 | /** |
| 97 | * @return the flowLabel |
| 98 | */ |
| 99 | public int getFlowLabel() { |
| 100 | return this.flowLabel; |
| 101 | } |
| 102 | |
| 103 | /** |
| 104 | * @param flowLabel |
| 105 | * the flowLabel to set |
| 106 | * @return this |
| 107 | */ |
| 108 | public IPv6 setFlowLabel(final int flowLabel) { |
| 109 | this.flowLabel = flowLabel; |
| 110 | return this; |
| 111 | } |
| 112 | |
| 113 | /** |
| 114 | * @return the nextHeader |
| 115 | */ |
| 116 | public byte getNextHeader() { |
| 117 | return this.nextHeader; |
| 118 | } |
| 119 | |
| 120 | /** |
| 121 | * @param nextHeader |
| 122 | * the nextHeader to set |
| 123 | * @return this |
| 124 | */ |
| 125 | public IPv6 setNextHeader(final byte nextHeader) { |
| 126 | this.nextHeader = nextHeader; |
| 127 | return this; |
| 128 | } |
| 129 | |
| 130 | /** |
| 131 | * @return the hopLimit |
| 132 | */ |
| 133 | public byte getHopLimit() { |
| 134 | return this.hopLimit; |
| 135 | } |
| 136 | |
| 137 | /** |
| 138 | * @param hopLimit |
| 139 | * the hopLimit to set |
| 140 | * @return this |
| 141 | */ |
| 142 | public IPv6 setHopLimit(final byte hopLimit) { |
| 143 | this.hopLimit = hopLimit; |
| 144 | return this; |
| 145 | } |
| 146 | |
| 147 | /** |
| 148 | * @return the sourceAddress |
| 149 | */ |
| 150 | public byte[] getSourceAddress() { |
| 151 | return this.sourceAddress; |
| 152 | } |
| 153 | |
| 154 | /** |
| 155 | * @param sourceAddress |
| 156 | * the sourceAddress to set |
| 157 | * @return this |
| 158 | */ |
| 159 | public IPv6 setSourceAddress(final byte[] sourceAddress) { |
| 160 | this.sourceAddress = Arrays.copyOfRange(sourceAddress, 0, Ip6Address.BYTE_LENGTH); |
| 161 | return this; |
| 162 | } |
| 163 | |
| 164 | /** |
| 165 | * @return the destinationAddress |
| 166 | */ |
| 167 | public byte[] getDestinationAddress() { |
| 168 | return this.destinationAddress; |
| 169 | } |
| 170 | |
| 171 | /** |
| 172 | * @param destinationAddress |
| 173 | * the destinationAddress to set |
| 174 | * @return this |
| 175 | */ |
| 176 | public IPv6 setDestinationAddress(final byte[] destinationAddress) { |
| 177 | this.destinationAddress = Arrays.copyOfRange(destinationAddress, 0, Ip6Address.BYTE_LENGTH); |
| 178 | return this; |
| 179 | } |
| 180 | |
| 181 | @Override |
| 182 | public byte[] serialize() { |
| 183 | byte[] payloadData = null; |
| 184 | if (this.payload != null) { |
| 185 | this.payload.setParent(this); |
| 186 | payloadData = this.payload.serialize(); |
| 187 | } |
| 188 | |
| 189 | this.payloadLength = payloadData == null ? 0 : (short) payloadData.length; |
| 190 | |
| 191 | final byte[] data = new byte[FIXED_HEADER_LENGTH + payloadLength]; |
| 192 | final ByteBuffer bb = ByteBuffer.wrap(data); |
| 193 | |
| 194 | bb.putInt((this.version & 0xf) << 28 | (this.diffServ & 0xff) << 20 | this.flowLabel & 0xfffff); |
| 195 | bb.putShort(this.payloadLength); |
| 196 | bb.put(this.nextHeader); |
| 197 | bb.put(this.hopLimit); |
| 198 | bb.put(this.sourceAddress, 0, Ip6Address.BYTE_LENGTH); |
| 199 | bb.put(this.destinationAddress, 0, Ip6Address.BYTE_LENGTH); |
| 200 | |
| 201 | if (payloadData != null) { |
| 202 | bb.put(payloadData); |
| 203 | } |
| 204 | |
| 205 | return data; |
| 206 | } |
| 207 | |
| 208 | @Override |
| 209 | public IPacket deserialize(final byte[] data, final int offset, |
| 210 | final int length) { |
| 211 | final ByteBuffer bb = ByteBuffer.wrap(data, offset, length); |
| 212 | int iscratch; |
| 213 | |
| 214 | iscratch = bb.getInt(); |
| 215 | this.version = (byte) (iscratch >> 28 & 0xf); |
| 216 | this.diffServ = (byte) (iscratch >> 20 & 0xff); |
| 217 | this.flowLabel = iscratch & 0xfffff; |
| 218 | this.payloadLength = bb.getShort(); |
| 219 | this.nextHeader = bb.get(); |
| 220 | this.hopLimit = bb.get(); |
| 221 | bb.get(this.sourceAddress, 0, Ip6Address.BYTE_LENGTH); |
| 222 | bb.get(this.destinationAddress, 0, Ip6Address.BYTE_LENGTH); |
| 223 | |
| 224 | IPacket payload; |
| 225 | if (IPv6.PROTOCOL_CLASS_MAP.containsKey(this.nextHeader)) { |
| 226 | final Class<? extends IPacket> clazz = IPv6.PROTOCOL_CLASS_MAP |
| 227 | .get(this.nextHeader); |
| 228 | try { |
| 229 | payload = clazz.newInstance(); |
| 230 | } catch (final Exception e) { |
| 231 | throw new RuntimeException( |
| 232 | "Error parsing payload for IPv6 packet", e); |
| 233 | } |
| 234 | } else { |
| 235 | payload = new Data(); |
| 236 | } |
| 237 | this.payload = payload.deserialize(data, bb.position(), |
| 238 | bb.limit() - bb.position()); |
| 239 | this.payload.setParent(this); |
| 240 | |
| 241 | return this; |
| 242 | } |
| 243 | |
| 244 | /* |
| 245 | * (non-Javadoc) |
| 246 | * |
| 247 | * @see java.lang.Object#hashCode() |
| 248 | */ |
| 249 | @Override |
| 250 | public int hashCode() { |
| 251 | final int prime = 2521; |
| 252 | int result = super.hashCode(); |
| 253 | ByteBuffer bb; |
| 254 | bb = ByteBuffer.wrap(this.destinationAddress); |
| 255 | for (int i = 0; i < 4; i++) { |
| 256 | result = prime * result + bb.getInt(); |
| 257 | } |
| 258 | result = prime * result + this.diffServ; |
| 259 | result = prime * result + this.flowLabel; |
| 260 | result = prime * result + this.hopLimit; |
| 261 | result = prime * result + this.nextHeader; |
| 262 | result = prime * result + this.payloadLength; |
| 263 | bb = ByteBuffer.wrap(this.sourceAddress); |
| 264 | for (int i = 0; i < 4; i++) { |
| 265 | result = prime * result + bb.getInt(); |
| 266 | } |
| 267 | result = prime * result + this.version; |
| 268 | return result; |
| 269 | } |
| 270 | |
| 271 | /* |
| 272 | * (non-Javadoc) |
| 273 | * |
| 274 | * @see java.lang.Object#equals(java.lang.Object) |
| 275 | */ |
| 276 | @Override |
| 277 | public boolean equals(final Object obj) { |
| 278 | if (this == obj) { |
| 279 | return true; |
| 280 | } |
| 281 | if (!super.equals(obj)) { |
| 282 | return false; |
| 283 | } |
| 284 | if (!(obj instanceof IPv6)) { |
| 285 | return false; |
| 286 | } |
| 287 | final IPv6 other = (IPv6) obj; |
| 288 | if (!Arrays.equals(this.destinationAddress, other.destinationAddress)) { |
| 289 | return false; |
| 290 | } |
| 291 | if (this.diffServ != other.diffServ) { |
| 292 | return false; |
| 293 | } |
| 294 | if (this.flowLabel != other.flowLabel) { |
| 295 | return false; |
| 296 | } |
| 297 | if (this.hopLimit != other.hopLimit) { |
| 298 | return false; |
| 299 | } |
| 300 | if (this.nextHeader != other.nextHeader) { |
| 301 | return false; |
| 302 | } |
| 303 | if (this.payloadLength != other.payloadLength) { |
| 304 | return false; |
| 305 | } |
| 306 | if (!Arrays.equals(this.sourceAddress, other.sourceAddress)) { |
| 307 | return false; |
| 308 | } |
| 309 | return true; |
| 310 | } |
| 311 | } |