alshabib | c4901cd | 2014-09-05 16:50:40 -0700 | [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 | * Copyright 2011, Big Switch Networks, Inc. |
| 18 | * Originally created by David Erickson, Stanford University |
| 19 | * |
| 20 | * Licensed under the Apache License, Version 2.0 (the "License"); you may |
| 21 | * not use this file except in compliance with the License. You may obtain |
| 22 | * a copy of the License at |
| 23 | * |
| 24 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 25 | * |
| 26 | * Unless required by applicable law or agreed to in writing, software |
| 27 | * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT |
| 28 | * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the |
| 29 | * License for the specific language governing permissions and limitations |
| 30 | * under the License. |
| 31 | **/ |
| 32 | |
| 33 | /** |
| 34 | * |
| 35 | */ |
| 36 | package org.onlab.packet; |
| 37 | |
| 38 | import java.nio.ByteBuffer; |
| 39 | import java.util.Arrays; |
| 40 | import java.util.Collection; |
| 41 | import java.util.HashMap; |
| 42 | import java.util.Map; |
| 43 | |
| 44 | /** |
alshabib | c4901cd | 2014-09-05 16:50:40 -0700 | [diff] [blame] | 45 | * |
| 46 | */ |
| 47 | public class IPv4 extends BasePacket { |
| 48 | public static final byte PROTOCOL_ICMP = 0x1; |
| 49 | public static final byte PROTOCOL_TCP = 0x6; |
| 50 | public static final byte PROTOCOL_UDP = 0x11; |
| 51 | public static Map<Byte, Class<? extends IPacket>> protocolClassMap; |
| 52 | |
| 53 | static { |
| 54 | IPv4.protocolClassMap = new HashMap<Byte, Class<? extends IPacket>>(); |
| 55 | IPv4.protocolClassMap.put(IPv4.PROTOCOL_ICMP, ICMP.class); |
| 56 | IPv4.protocolClassMap.put(IPv4.PROTOCOL_TCP, TCP.class); |
| 57 | IPv4.protocolClassMap.put(IPv4.PROTOCOL_UDP, UDP.class); |
| 58 | } |
| 59 | |
| 60 | protected byte version; |
| 61 | protected byte headerLength; |
| 62 | protected byte diffServ; |
| 63 | protected short totalLength; |
| 64 | protected short identification; |
| 65 | protected byte flags; |
| 66 | protected short fragmentOffset; |
| 67 | protected byte ttl; |
| 68 | protected byte protocol; |
| 69 | protected short checksum; |
| 70 | protected int sourceAddress; |
| 71 | protected int destinationAddress; |
| 72 | protected byte[] options; |
| 73 | |
| 74 | protected boolean isTruncated; |
| 75 | |
| 76 | /** |
| 77 | * Default constructor that sets the version to 4. |
| 78 | */ |
| 79 | public IPv4() { |
| 80 | super(); |
| 81 | this.version = 4; |
| 82 | this.isTruncated = false; |
| 83 | } |
| 84 | |
| 85 | /** |
| 86 | * @return the version |
| 87 | */ |
| 88 | public byte getVersion() { |
| 89 | return this.version; |
| 90 | } |
| 91 | |
| 92 | /** |
| 93 | * @param version |
| 94 | * the version to set |
| 95 | */ |
| 96 | public IPv4 setVersion(final byte version) { |
| 97 | this.version = version; |
| 98 | return this; |
| 99 | } |
| 100 | |
| 101 | /** |
| 102 | * @return the headerLength |
| 103 | */ |
| 104 | public byte getHeaderLength() { |
| 105 | return this.headerLength; |
| 106 | } |
| 107 | |
| 108 | /** |
| 109 | * @return the diffServ |
| 110 | */ |
| 111 | public byte getDiffServ() { |
| 112 | return this.diffServ; |
| 113 | } |
| 114 | |
| 115 | /** |
| 116 | * @param diffServ |
| 117 | * the diffServ to set |
| 118 | */ |
| 119 | public IPv4 setDiffServ(final byte diffServ) { |
| 120 | this.diffServ = diffServ; |
| 121 | return this; |
| 122 | } |
| 123 | |
| 124 | /** |
| 125 | * @return the totalLength |
| 126 | */ |
| 127 | public short getTotalLength() { |
| 128 | return this.totalLength; |
| 129 | } |
| 130 | |
| 131 | /** |
| 132 | * @return the identification |
| 133 | */ |
| 134 | public short getIdentification() { |
| 135 | return this.identification; |
| 136 | } |
| 137 | |
| 138 | public boolean isTruncated() { |
| 139 | return this.isTruncated; |
| 140 | } |
| 141 | |
| 142 | public void setTruncated(final boolean isTruncated) { |
| 143 | this.isTruncated = isTruncated; |
| 144 | } |
| 145 | |
| 146 | /** |
| 147 | * @param identification |
| 148 | * the identification to set |
| 149 | */ |
| 150 | public IPv4 setIdentification(final short identification) { |
| 151 | this.identification = identification; |
| 152 | return this; |
| 153 | } |
| 154 | |
| 155 | /** |
| 156 | * @return the flags |
| 157 | */ |
| 158 | public byte getFlags() { |
| 159 | return this.flags; |
| 160 | } |
| 161 | |
| 162 | /** |
| 163 | * @param flags |
| 164 | * the flags to set |
| 165 | */ |
| 166 | public IPv4 setFlags(final byte flags) { |
| 167 | this.flags = flags; |
| 168 | return this; |
| 169 | } |
| 170 | |
| 171 | /** |
| 172 | * @return the fragmentOffset |
| 173 | */ |
| 174 | public short getFragmentOffset() { |
| 175 | return this.fragmentOffset; |
| 176 | } |
| 177 | |
| 178 | /** |
| 179 | * @param fragmentOffset |
| 180 | * the fragmentOffset to set |
| 181 | */ |
| 182 | public IPv4 setFragmentOffset(final short fragmentOffset) { |
| 183 | this.fragmentOffset = fragmentOffset; |
| 184 | return this; |
| 185 | } |
| 186 | |
| 187 | /** |
| 188 | * @return the ttl |
| 189 | */ |
| 190 | public byte getTtl() { |
| 191 | return this.ttl; |
| 192 | } |
| 193 | |
| 194 | /** |
| 195 | * @param ttl |
| 196 | * the ttl to set |
| 197 | */ |
| 198 | public IPv4 setTtl(final byte ttl) { |
| 199 | this.ttl = ttl; |
| 200 | return this; |
| 201 | } |
| 202 | |
| 203 | /** |
| 204 | * @return the protocol |
| 205 | */ |
| 206 | public byte getProtocol() { |
| 207 | return this.protocol; |
| 208 | } |
| 209 | |
| 210 | /** |
| 211 | * @param protocol |
| 212 | * the protocol to set |
| 213 | */ |
| 214 | public IPv4 setProtocol(final byte protocol) { |
| 215 | this.protocol = protocol; |
| 216 | return this; |
| 217 | } |
| 218 | |
| 219 | /** |
| 220 | * @return the checksum |
| 221 | */ |
| 222 | public short getChecksum() { |
| 223 | return this.checksum; |
| 224 | } |
| 225 | |
| 226 | /** |
| 227 | * @param checksum |
| 228 | * the checksum to set |
| 229 | */ |
| 230 | public IPv4 setChecksum(final short checksum) { |
| 231 | this.checksum = checksum; |
| 232 | return this; |
| 233 | } |
| 234 | |
| 235 | @Override |
| 236 | public void resetChecksum() { |
| 237 | this.checksum = 0; |
| 238 | super.resetChecksum(); |
| 239 | } |
| 240 | |
| 241 | /** |
| 242 | * @return the sourceAddress |
| 243 | */ |
| 244 | public int getSourceAddress() { |
| 245 | return this.sourceAddress; |
| 246 | } |
| 247 | |
| 248 | /** |
| 249 | * @param sourceAddress |
| 250 | * the sourceAddress to set |
| 251 | */ |
| 252 | public IPv4 setSourceAddress(final int sourceAddress) { |
| 253 | this.sourceAddress = sourceAddress; |
| 254 | return this; |
| 255 | } |
| 256 | |
| 257 | /** |
| 258 | * @param sourceAddress |
| 259 | * the sourceAddress to set |
| 260 | */ |
| 261 | public IPv4 setSourceAddress(final String sourceAddress) { |
| 262 | this.sourceAddress = IPv4.toIPv4Address(sourceAddress); |
| 263 | return this; |
| 264 | } |
| 265 | |
| 266 | /** |
| 267 | * @return the destinationAddress |
| 268 | */ |
| 269 | public int getDestinationAddress() { |
| 270 | return this.destinationAddress; |
| 271 | } |
| 272 | |
| 273 | /** |
| 274 | * @param destinationAddress |
| 275 | * the destinationAddress to set |
| 276 | */ |
| 277 | public IPv4 setDestinationAddress(final int destinationAddress) { |
| 278 | this.destinationAddress = destinationAddress; |
| 279 | return this; |
| 280 | } |
| 281 | |
| 282 | /** |
| 283 | * @param destinationAddress |
| 284 | * the destinationAddress to set |
| 285 | */ |
| 286 | public IPv4 setDestinationAddress(final String destinationAddress) { |
| 287 | this.destinationAddress = IPv4.toIPv4Address(destinationAddress); |
| 288 | return this; |
| 289 | } |
| 290 | |
| 291 | /** |
| 292 | * @return the options |
| 293 | */ |
| 294 | public byte[] getOptions() { |
| 295 | return this.options; |
| 296 | } |
| 297 | |
| 298 | /** |
| 299 | * @param options |
| 300 | * the options to set |
| 301 | */ |
| 302 | public IPv4 setOptions(final byte[] options) { |
| 303 | if (options != null && options.length % 4 > 0) { |
| 304 | throw new IllegalArgumentException( |
| 305 | "Options length must be a multiple of 4"); |
| 306 | } |
| 307 | this.options = options; |
| 308 | return this; |
| 309 | } |
| 310 | |
| 311 | /** |
| 312 | * Serializes the packet. Will compute and set the following fields if they |
| 313 | * are set to specific values at the time serialize is called: -checksum : 0 |
| 314 | * -headerLength : 0 -totalLength : 0 |
| 315 | */ |
| 316 | @Override |
| 317 | public byte[] serialize() { |
| 318 | byte[] payloadData = null; |
| 319 | if (this.payload != null) { |
| 320 | this.payload.setParent(this); |
| 321 | payloadData = this.payload.serialize(); |
| 322 | } |
| 323 | |
| 324 | int optionsLength = 0; |
| 325 | if (this.options != null) { |
| 326 | optionsLength = this.options.length / 4; |
| 327 | } |
| 328 | this.headerLength = (byte) (5 + optionsLength); |
| 329 | |
| 330 | this.totalLength = (short) (this.headerLength * 4 + (payloadData == null ? 0 |
| 331 | : payloadData.length)); |
| 332 | |
| 333 | final byte[] data = new byte[this.totalLength]; |
| 334 | final ByteBuffer bb = ByteBuffer.wrap(data); |
| 335 | |
| 336 | bb.put((byte) ((this.version & 0xf) << 4 | this.headerLength & 0xf)); |
| 337 | bb.put(this.diffServ); |
| 338 | bb.putShort(this.totalLength); |
| 339 | bb.putShort(this.identification); |
| 340 | bb.putShort((short) ((this.flags & 0x7) << 13 | this.fragmentOffset & 0x1fff)); |
| 341 | bb.put(this.ttl); |
| 342 | bb.put(this.protocol); |
| 343 | bb.putShort(this.checksum); |
| 344 | bb.putInt(this.sourceAddress); |
| 345 | bb.putInt(this.destinationAddress); |
| 346 | if (this.options != null) { |
| 347 | bb.put(this.options); |
| 348 | } |
| 349 | if (payloadData != null) { |
| 350 | bb.put(payloadData); |
| 351 | } |
| 352 | |
| 353 | // compute checksum if needed |
| 354 | if (this.checksum == 0) { |
| 355 | bb.rewind(); |
| 356 | int accumulation = 0; |
| 357 | for (int i = 0; i < this.headerLength * 2; ++i) { |
| 358 | accumulation += 0xffff & bb.getShort(); |
| 359 | } |
| 360 | accumulation = (accumulation >> 16 & 0xffff) |
| 361 | + (accumulation & 0xffff); |
| 362 | this.checksum = (short) (~accumulation & 0xffff); |
| 363 | bb.putShort(10, this.checksum); |
| 364 | } |
| 365 | return data; |
| 366 | } |
| 367 | |
| 368 | @Override |
| 369 | public IPacket deserialize(final byte[] data, final int offset, |
| 370 | final int length) { |
| 371 | final ByteBuffer bb = ByteBuffer.wrap(data, offset, length); |
| 372 | short sscratch; |
| 373 | |
| 374 | this.version = bb.get(); |
| 375 | this.headerLength = (byte) (this.version & 0xf); |
| 376 | this.version = (byte) (this.version >> 4 & 0xf); |
| 377 | this.diffServ = bb.get(); |
| 378 | this.totalLength = bb.getShort(); |
| 379 | this.identification = bb.getShort(); |
| 380 | sscratch = bb.getShort(); |
| 381 | this.flags = (byte) (sscratch >> 13 & 0x7); |
| 382 | this.fragmentOffset = (short) (sscratch & 0x1fff); |
| 383 | this.ttl = bb.get(); |
| 384 | this.protocol = bb.get(); |
| 385 | this.checksum = bb.getShort(); |
| 386 | this.sourceAddress = bb.getInt(); |
| 387 | this.destinationAddress = bb.getInt(); |
| 388 | |
| 389 | if (this.headerLength > 5) { |
| 390 | final int optionsLength = (this.headerLength - 5) * 4; |
| 391 | this.options = new byte[optionsLength]; |
| 392 | bb.get(this.options); |
| 393 | } |
| 394 | |
| 395 | IPacket payload; |
| 396 | if (IPv4.protocolClassMap.containsKey(this.protocol)) { |
| 397 | final Class<? extends IPacket> clazz = IPv4.protocolClassMap |
| 398 | .get(this.protocol); |
| 399 | try { |
| 400 | payload = clazz.newInstance(); |
| 401 | } catch (final Exception e) { |
| 402 | throw new RuntimeException( |
| 403 | "Error parsing payload for IPv4 packet", e); |
| 404 | } |
| 405 | } else { |
| 406 | payload = new Data(); |
| 407 | } |
| 408 | this.payload = payload.deserialize(data, bb.position(), |
| 409 | bb.limit() - bb.position()); |
| 410 | this.payload.setParent(this); |
| 411 | |
| 412 | if (this.totalLength != length) { |
| 413 | this.isTruncated = true; |
| 414 | } else { |
| 415 | this.isTruncated = false; |
| 416 | } |
| 417 | |
| 418 | return this; |
| 419 | } |
| 420 | |
| 421 | /** |
| 422 | * Accepts an IPv4 address of the form xxx.xxx.xxx.xxx, ie 192.168.0.1 and |
| 423 | * returns the corresponding 32 bit integer. |
| 424 | * |
tom | 5f18cf3 | 2014-09-13 14:10:57 -0700 | [diff] [blame] | 425 | * @param ipAddress ip address in string form |
| 426 | * @return int ip address value |
alshabib | c4901cd | 2014-09-05 16:50:40 -0700 | [diff] [blame] | 427 | */ |
| 428 | public static int toIPv4Address(final String ipAddress) { |
| 429 | if (ipAddress == null) { |
| 430 | throw new IllegalArgumentException("Specified IPv4 address must" |
| 431 | + "contain 4 sets of numerical digits separated by periods"); |
| 432 | } |
| 433 | final String[] octets = ipAddress.split("\\."); |
| 434 | if (octets.length != 4) { |
| 435 | throw new IllegalArgumentException("Specified IPv4 address must" |
| 436 | + "contain 4 sets of numerical digits separated by periods"); |
| 437 | } |
| 438 | |
| 439 | int result = 0; |
| 440 | for (int i = 0; i < 4; ++i) { |
| 441 | result |= Integer.valueOf(octets[i]) << (3 - i) * 8; |
| 442 | } |
| 443 | return result; |
| 444 | } |
| 445 | |
| 446 | /** |
| 447 | * Accepts an IPv4 address in a byte array and returns the corresponding |
| 448 | * 32-bit integer value. |
| 449 | * |
tom | 5f18cf3 | 2014-09-13 14:10:57 -0700 | [diff] [blame] | 450 | * @param ipAddress ip address in byte form |
| 451 | * @return int ip address value |
alshabib | c4901cd | 2014-09-05 16:50:40 -0700 | [diff] [blame] | 452 | */ |
| 453 | public static int toIPv4Address(final byte[] ipAddress) { |
| 454 | int ip = 0; |
| 455 | for (int i = 0; i < 4; i++) { |
| 456 | final int t = (ipAddress[i] & 0xff) << (3 - i) * 8; |
| 457 | ip |= t; |
| 458 | } |
| 459 | return ip; |
| 460 | } |
| 461 | |
| 462 | /** |
| 463 | * Accepts an IPv4 address and returns of string of the form xxx.xxx.xxx.xxx, |
| 464 | * e.g., 192.168.0.1. |
| 465 | * |
tom | 5f18cf3 | 2014-09-13 14:10:57 -0700 | [diff] [blame] | 466 | * @param ipAddress ip address in form |
| 467 | * @return string form of ip address |
alshabib | c4901cd | 2014-09-05 16:50:40 -0700 | [diff] [blame] | 468 | */ |
| 469 | public static String fromIPv4Address(final int ipAddress) { |
| 470 | final StringBuffer sb = new StringBuffer(); |
| 471 | int result = 0; |
| 472 | for (int i = 0; i < 4; ++i) { |
| 473 | result = ipAddress >> (3 - i) * 8 & 0xff; |
alshabib | 638dc71 | 2014-09-05 18:03:45 -0700 | [diff] [blame] | 474 | sb.append(Integer.valueOf(result).toString()); |
| 475 | if (i != 3) { |
| 476 | sb.append("."); |
| 477 | } |
alshabib | c4901cd | 2014-09-05 16:50:40 -0700 | [diff] [blame] | 478 | } |
| 479 | return sb.toString(); |
| 480 | } |
| 481 | |
| 482 | /** |
| 483 | * Accepts a collection of IPv4 addresses as integers and returns a single |
| 484 | * String useful in toString method's containing collections of IP |
| 485 | * addresses. |
| 486 | * |
| 487 | * @param ipAddresses |
| 488 | * collection |
tom | 5f18cf3 | 2014-09-13 14:10:57 -0700 | [diff] [blame] | 489 | * @return ip addresses in comma-separated string form |
alshabib | c4901cd | 2014-09-05 16:50:40 -0700 | [diff] [blame] | 490 | */ |
| 491 | public static String fromIPv4AddressCollection( |
| 492 | final Collection<Integer> ipAddresses) { |
| 493 | if (ipAddresses == null) { |
| 494 | return "null"; |
| 495 | } |
| 496 | final StringBuffer sb = new StringBuffer(); |
| 497 | sb.append("["); |
| 498 | for (final Integer ip : ipAddresses) { |
| 499 | sb.append(IPv4.fromIPv4Address(ip)); |
| 500 | sb.append(","); |
| 501 | } |
| 502 | sb.replace(sb.length() - 1, sb.length(), "]"); |
| 503 | return sb.toString(); |
| 504 | } |
| 505 | |
| 506 | /** |
| 507 | * Accepts an IPv4 address of the form xxx.xxx.xxx.xxx, ie 192.168.0.1 and |
| 508 | * returns the corresponding byte array. |
| 509 | * |
| 510 | * @param ipAddress |
| 511 | * The IP address in the form xx.xxx.xxx.xxx. |
| 512 | * @return The IP address separated into bytes |
| 513 | */ |
| 514 | public static byte[] toIPv4AddressBytes(final String ipAddress) { |
| 515 | final String[] octets = ipAddress.split("\\."); |
| 516 | if (octets.length != 4) { |
| 517 | throw new IllegalArgumentException("Specified IPv4 address must" |
| 518 | + "contain 4 sets of numerical digits separated by periods"); |
| 519 | } |
| 520 | |
| 521 | final byte[] result = new byte[4]; |
| 522 | for (int i = 0; i < 4; ++i) { |
| 523 | result[i] = Integer.valueOf(octets[i]).byteValue(); |
| 524 | } |
| 525 | return result; |
| 526 | } |
| 527 | |
| 528 | /** |
| 529 | * Accepts an IPv4 address in the form of an integer and returns the |
| 530 | * corresponding byte array. |
| 531 | * |
| 532 | * @param ipAddress |
| 533 | * The IP address as an integer. |
| 534 | * @return The IP address separated into bytes. |
| 535 | */ |
| 536 | public static byte[] toIPv4AddressBytes(final int ipAddress) { |
| 537 | return new byte[] {(byte) (ipAddress >>> 24), |
| 538 | (byte) (ipAddress >>> 16), (byte) (ipAddress >>> 8), |
| 539 | (byte) ipAddress}; |
| 540 | } |
| 541 | |
| 542 | /* |
| 543 | * (non-Javadoc) |
| 544 | * |
| 545 | * @see java.lang.Object#hashCode() |
| 546 | */ |
| 547 | @Override |
| 548 | public int hashCode() { |
| 549 | final int prime = 2521; |
| 550 | int result = super.hashCode(); |
| 551 | result = prime * result + this.checksum; |
| 552 | result = prime * result + this.destinationAddress; |
| 553 | result = prime * result + this.diffServ; |
| 554 | result = prime * result + this.flags; |
| 555 | result = prime * result + this.fragmentOffset; |
| 556 | result = prime * result + this.headerLength; |
| 557 | result = prime * result + this.identification; |
| 558 | result = prime * result + Arrays.hashCode(this.options); |
| 559 | result = prime * result + this.protocol; |
| 560 | result = prime * result + this.sourceAddress; |
| 561 | result = prime * result + this.totalLength; |
| 562 | result = prime * result + this.ttl; |
| 563 | result = prime * result + this.version; |
| 564 | return result; |
| 565 | } |
| 566 | |
| 567 | /* |
| 568 | * (non-Javadoc) |
| 569 | * |
| 570 | * @see java.lang.Object#equals(java.lang.Object) |
| 571 | */ |
| 572 | @Override |
| 573 | public boolean equals(final Object obj) { |
| 574 | if (this == obj) { |
| 575 | return true; |
| 576 | } |
| 577 | if (!super.equals(obj)) { |
| 578 | return false; |
| 579 | } |
| 580 | if (!(obj instanceof IPv4)) { |
| 581 | return false; |
| 582 | } |
| 583 | final IPv4 other = (IPv4) obj; |
| 584 | if (this.checksum != other.checksum) { |
| 585 | return false; |
| 586 | } |
| 587 | if (this.destinationAddress != other.destinationAddress) { |
| 588 | return false; |
| 589 | } |
| 590 | if (this.diffServ != other.diffServ) { |
| 591 | return false; |
| 592 | } |
| 593 | if (this.flags != other.flags) { |
| 594 | return false; |
| 595 | } |
| 596 | if (this.fragmentOffset != other.fragmentOffset) { |
| 597 | return false; |
| 598 | } |
| 599 | if (this.headerLength != other.headerLength) { |
| 600 | return false; |
| 601 | } |
| 602 | if (this.identification != other.identification) { |
| 603 | return false; |
| 604 | } |
| 605 | if (!Arrays.equals(this.options, other.options)) { |
| 606 | return false; |
| 607 | } |
| 608 | if (this.protocol != other.protocol) { |
| 609 | return false; |
| 610 | } |
| 611 | if (this.sourceAddress != other.sourceAddress) { |
| 612 | return false; |
| 613 | } |
| 614 | if (this.totalLength != other.totalLength) { |
| 615 | return false; |
| 616 | } |
| 617 | if (this.ttl != other.ttl) { |
| 618 | return false; |
| 619 | } |
| 620 | if (this.version != other.version) { |
| 621 | return false; |
| 622 | } |
| 623 | return true; |
| 624 | } |
| 625 | } |