| 1 | /******************************************************************************* |
| 2 | * Copyright (c) 2014 Ericsson |
| 3 | * |
| 4 | * All rights reserved. This program and the accompanying materials are |
| 5 | * made available under the terms of the Eclipse Public License v1.0 which |
| 6 | * accompanies this distribution, and is available at |
| 7 | * http://www.eclipse.org/legal/epl-v10.html |
| 8 | * |
| 9 | * Contributors: |
| 10 | * Vincent Perot - Initial API and implementation |
| 11 | *******************************************************************************/ |
| 12 | |
| 13 | package org.eclipse.tracecompass.internal.pcap.core.protocol.tcp; |
| 14 | |
| 15 | import static org.eclipse.tracecompass.common.core.NonNullUtils.checkNotNull; |
| 16 | |
| 17 | import java.nio.ByteBuffer; |
| 18 | import java.nio.ByteOrder; |
| 19 | import java.util.Arrays; |
| 20 | import java.util.Map; |
| 21 | |
| 22 | import org.eclipse.jdt.annotation.Nullable; |
| 23 | import org.eclipse.tracecompass.internal.pcap.core.packet.BadPacketException; |
| 24 | import org.eclipse.tracecompass.internal.pcap.core.packet.Packet; |
| 25 | import org.eclipse.tracecompass.internal.pcap.core.protocol.PcapProtocol; |
| 26 | import org.eclipse.tracecompass.internal.pcap.core.protocol.unknown.UnknownPacket; |
| 27 | import org.eclipse.tracecompass.internal.pcap.core.trace.PcapFile; |
| 28 | import org.eclipse.tracecompass.internal.pcap.core.util.ConversionHelper; |
| 29 | |
| 30 | import com.google.common.collect.ImmutableMap; |
| 31 | import com.google.common.collect.ImmutableMap.Builder; |
| 32 | |
| 33 | /** |
| 34 | * Class that represents a TCP packet. |
| 35 | * |
| 36 | * @author Vincent Perot |
| 37 | */ |
| 38 | public class TCPPacket extends Packet { |
| 39 | |
| 40 | private final @Nullable Packet fChildPacket; |
| 41 | private final @Nullable ByteBuffer fPayload; |
| 42 | |
| 43 | private final int fSourcePort; |
| 44 | private final int fDestinationPort; |
| 45 | private final long fSequenceNumber; |
| 46 | private final long fAcknowledgmentNumber; |
| 47 | private final int fDataOffset; // in 4 bytes block |
| 48 | private final byte fReservedField; |
| 49 | private final boolean fNSFlag; |
| 50 | private final boolean fCWRFlag; |
| 51 | private final boolean fECEFlag; |
| 52 | private final boolean fURGFlag; |
| 53 | private final boolean fACKFlag; |
| 54 | private final boolean fPSHFlag; |
| 55 | private final boolean fRSTFlag; |
| 56 | private final boolean fSYNFlag; |
| 57 | private final boolean fFINFlag; |
| 58 | private final int fWindowSize; |
| 59 | private final int fChecksum; |
| 60 | private final int fUrgentPointer; |
| 61 | private final @Nullable byte[] fOptions; // TODO Interpret options. |
| 62 | |
| 63 | private @Nullable TCPEndpoint fSourceEndpoint; |
| 64 | private @Nullable TCPEndpoint fDestinationEndpoint; |
| 65 | |
| 66 | private @Nullable Map<String, String> fFields; |
| 67 | |
| 68 | /** |
| 69 | * Constructor of the TCP Packet class. |
| 70 | * |
| 71 | * @param file |
| 72 | * The file that contains this packet. |
| 73 | * @param parent |
| 74 | * The parent packet of this packet (the encapsulating packet). |
| 75 | * @param packet |
| 76 | * The entire packet (header and payload). |
| 77 | * @throws BadPacketException |
| 78 | * Thrown when the packet is erroneous. |
| 79 | */ |
| 80 | public TCPPacket(PcapFile file, @Nullable Packet parent, ByteBuffer packet) throws BadPacketException { |
| 81 | super(file, parent, PcapProtocol.TCP); |
| 82 | |
| 83 | // The endpoints are lazy loaded. They are defined in the get*Endpoint() |
| 84 | // methods. |
| 85 | fSourceEndpoint = null; |
| 86 | fDestinationEndpoint = null; |
| 87 | |
| 88 | fFields = null; |
| 89 | |
| 90 | packet.order(ByteOrder.BIG_ENDIAN); |
| 91 | packet.position(0); |
| 92 | |
| 93 | fSourcePort = ConversionHelper.unsignedShortToInt(packet.getShort()); |
| 94 | fDestinationPort = ConversionHelper.unsignedShortToInt(packet.getShort()); |
| 95 | fSequenceNumber = ConversionHelper.unsignedIntToLong(packet.getInt()); |
| 96 | fAcknowledgmentNumber = ConversionHelper.unsignedIntToLong(packet.getInt()); |
| 97 | |
| 98 | byte storage = packet.get(); |
| 99 | fDataOffset = ((storage & 0b11110000) >>> 4) & 0x000000FF; |
| 100 | fReservedField = (byte) ((storage & 0b00001110) >>> 1); |
| 101 | fNSFlag = isBitSet(storage, 0); |
| 102 | |
| 103 | storage = packet.get(); |
| 104 | fCWRFlag = isBitSet(storage, 7); |
| 105 | fECEFlag = isBitSet(storage, 6); |
| 106 | fURGFlag = isBitSet(storage, 5); |
| 107 | fACKFlag = isBitSet(storage, 4); |
| 108 | fPSHFlag = isBitSet(storage, 3); |
| 109 | fRSTFlag = isBitSet(storage, 2); |
| 110 | fSYNFlag = isBitSet(storage, 1); |
| 111 | fFINFlag = isBitSet(storage, 0); |
| 112 | |
| 113 | fWindowSize = ConversionHelper.unsignedShortToInt(packet.getShort()); |
| 114 | fChecksum = ConversionHelper.unsignedShortToInt(packet.getShort()); |
| 115 | fUrgentPointer = ConversionHelper.unsignedShortToInt(packet.getShort()); |
| 116 | |
| 117 | // Get options if any |
| 118 | if (fDataOffset > TCPValues.DEFAULT_HEADER_LENGTH) { |
| 119 | fOptions = new byte[(fDataOffset - TCPValues.DEFAULT_HEADER_LENGTH) * TCPValues.BLOCK_SIZE]; |
| 120 | packet.get(fOptions); |
| 121 | } else { |
| 122 | fOptions = null; |
| 123 | } |
| 124 | |
| 125 | // Get payload if any. |
| 126 | if (packet.array().length - packet.position() > 0) { |
| 127 | byte[] array = new byte[packet.array().length - packet.position()]; |
| 128 | packet.get(array); |
| 129 | ByteBuffer payload = ByteBuffer.wrap(array); |
| 130 | payload.order(ByteOrder.BIG_ENDIAN); |
| 131 | payload.position(0); |
| 132 | fPayload = payload; |
| 133 | } else { |
| 134 | fPayload = null; |
| 135 | } |
| 136 | |
| 137 | // find child packet |
| 138 | fChildPacket = findChildPacket(); |
| 139 | |
| 140 | } |
| 141 | |
| 142 | @Override |
| 143 | public @Nullable Packet getChildPacket() { |
| 144 | return fChildPacket; |
| 145 | } |
| 146 | |
| 147 | @Override |
| 148 | public @Nullable ByteBuffer getPayload() { |
| 149 | return fPayload; |
| 150 | } |
| 151 | |
| 152 | /** |
| 153 | * {@inheritDoc} |
| 154 | * |
| 155 | * See http://www.iana.org/assignments/service-names-port-numbers/service- |
| 156 | * names-port-numbers.xhtml or |
| 157 | * http://en.wikipedia.org/wiki/List_of_TCP_and_UDP_port_numbers |
| 158 | */ |
| 159 | @Override |
| 160 | protected @Nullable Packet findChildPacket() throws BadPacketException { |
| 161 | // TODO implement further protocols and update this |
| 162 | ByteBuffer payload = fPayload; |
| 163 | if (payload == null) { |
| 164 | return null; |
| 165 | } |
| 166 | |
| 167 | return new UnknownPacket(getPcapFile(), this, payload); |
| 168 | } |
| 169 | |
| 170 | @Override |
| 171 | public String toString() { |
| 172 | final ByteBuffer payload = fPayload; |
| 173 | int length = 0; |
| 174 | if (payload != null) { |
| 175 | length = payload.array().length; |
| 176 | } |
| 177 | |
| 178 | String flagString = ""; // TODO Finish it. Im just too lazy. //$NON-NLS-1$ |
| 179 | String string = getProtocol().getName() + ", Source Port: " + fSourcePort + ", Destination Port: " + fDestinationPort + //$NON-NLS-1$ //$NON-NLS-2$ |
| 180 | "\nSequence Number: " + fSequenceNumber + ", Acknowledgment Number: " + fAcknowledgmentNumber + //$NON-NLS-1$ //$NON-NLS-2$ |
| 181 | "\nHeader length: " + fDataOffset * TCPValues.BLOCK_SIZE + " bytes, Data length: " + length + //$NON-NLS-1$ //$NON-NLS-2$ |
| 182 | "\n" + flagString + "Window size value: " + fWindowSize + ", Urgent Pointer: " + String.format("%s%04x", "0x", fUrgentPointer) + //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$ //$NON-NLS-4$ //$NON-NLS-5$ |
| 183 | "\nChecksum: " + String.format("%s%04x", "0x", fChecksum) + "\n"; //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$ //$NON-NLS-4$ |
| 184 | final Packet child = fChildPacket; |
| 185 | if (child != null) { |
| 186 | return string + child.toString(); |
| 187 | } |
| 188 | return string; |
| 189 | } |
| 190 | |
| 191 | /** |
| 192 | * Getter method that returns the TCP Source Port. |
| 193 | * |
| 194 | * @return The source Port. |
| 195 | */ |
| 196 | public int getSourcePort() { |
| 197 | return fSourcePort; |
| 198 | } |
| 199 | |
| 200 | /** |
| 201 | * Getter method that returns the TCP Destination Port. |
| 202 | * |
| 203 | * @return The destination Port. |
| 204 | */ |
| 205 | public int getDestinationPort() { |
| 206 | return fDestinationPort; |
| 207 | } |
| 208 | |
| 209 | /** |
| 210 | * Getter method that returns the Sequence Number. The sequence number has a |
| 211 | * dual role: |
| 212 | * <ul> |
| 213 | * <li>If the SYN flag is set (1), then this is the initial sequence number. |
| 214 | * The sequence number of the actual first data byte and the acknowledged |
| 215 | * number in the corresponding ACK are then this sequence number plus 1.</li> |
| 216 | * <li>If the SYN flag is clear (0), then this is the accumulated sequence |
| 217 | * number of the first data byte of this segment for the current session.</li> |
| 218 | * </ul> |
| 219 | * |
| 220 | * Source: http://en.wikipedia.org/wiki/Transmission_Control_Protocol |
| 221 | * |
| 222 | * @return The Sequence Number. |
| 223 | */ |
| 224 | public long getSequenceNumber() { |
| 225 | return fSequenceNumber; |
| 226 | } |
| 227 | |
| 228 | /** |
| 229 | * Getter method that returns the Acknowledgment Number. |
| 230 | * |
| 231 | * If the ACK flag is set then the value of this field is the next sequence |
| 232 | * number that the receiver is expecting. This acknowledges receipt of all |
| 233 | * prior bytes (if any). The first ACK sent by each end acknowledges the |
| 234 | * other end's initial sequence number itself, but no data. |
| 235 | * |
| 236 | * Source: http://en.wikipedia.org/wiki/Transmission_Control_Protocol |
| 237 | * |
| 238 | * @return The Acknowledgment Number. |
| 239 | */ |
| 240 | public long getAcknowledgmentNumber() { |
| 241 | return fAcknowledgmentNumber; |
| 242 | } |
| 243 | |
| 244 | /** |
| 245 | * Getter method that returns the size of the TCP header in 4 bytes data |
| 246 | * block. The minimum size is 5 words and the maximum is 15 words. |
| 247 | * |
| 248 | * @return The Data Offset. |
| 249 | */ |
| 250 | public int getDataOffset() { |
| 251 | return fDataOffset; |
| 252 | } |
| 253 | |
| 254 | /** |
| 255 | * Getter method that returns the Reserved field. This field is for future |
| 256 | * use and should always be zero. In this library, it is used as a mean to |
| 257 | * verify the validity of a TCP packet. |
| 258 | * |
| 259 | * @return The Reserved Field. |
| 260 | */ |
| 261 | public byte getReservedField() { |
| 262 | return fReservedField; |
| 263 | } |
| 264 | |
| 265 | /** |
| 266 | * Getter method that returns the state of the NS flag. |
| 267 | * |
| 268 | * @return The state of the NS flag. |
| 269 | */ |
| 270 | public boolean isNSFlagSet() { |
| 271 | return fNSFlag; |
| 272 | } |
| 273 | |
| 274 | /** |
| 275 | * Getter method that returns the state of the CWR flag. |
| 276 | * |
| 277 | * @return The state of the CWR flag. |
| 278 | */ |
| 279 | public boolean isCongestionWindowReducedFlagSet() { |
| 280 | return fCWRFlag; |
| 281 | } |
| 282 | |
| 283 | /** |
| 284 | * Getter method that returns the state of the ECE flag. |
| 285 | * |
| 286 | * @return The state of the ECE flag. |
| 287 | */ |
| 288 | public boolean isECNEchoFlagSet() { |
| 289 | return fECEFlag; |
| 290 | } |
| 291 | |
| 292 | /** |
| 293 | * Getter method that returns the state of the URG flag. |
| 294 | * |
| 295 | * @return The state of the URG flag. |
| 296 | */ |
| 297 | public boolean isUrgentFlagSet() { |
| 298 | return fURGFlag; |
| 299 | } |
| 300 | |
| 301 | /** |
| 302 | * Getter method that returns the state of the ACK flag. |
| 303 | * |
| 304 | * @return The state of the ACK flag. |
| 305 | */ |
| 306 | public boolean isAcknowledgeFlagSet() { |
| 307 | return fACKFlag; |
| 308 | } |
| 309 | |
| 310 | /** |
| 311 | * Getter method that returns the state of the PSH flag. |
| 312 | * |
| 313 | * @return The state of the PSH flag. |
| 314 | */ |
| 315 | public boolean isPushFlagSet() { |
| 316 | return fPSHFlag; |
| 317 | } |
| 318 | |
| 319 | /** |
| 320 | * Getter method that returns the state of the RST flag. |
| 321 | * |
| 322 | * @return The state of the RST flag. |
| 323 | */ |
| 324 | public boolean isResetFlagSet() { |
| 325 | return fRSTFlag; |
| 326 | } |
| 327 | |
| 328 | /** |
| 329 | * Getter method that returns the state of the SYN flag. |
| 330 | * |
| 331 | * @return The state of the SYN flag. |
| 332 | */ |
| 333 | public boolean isSynchronizationFlagSet() { |
| 334 | return fSYNFlag; |
| 335 | } |
| 336 | |
| 337 | /** |
| 338 | * Getter method that returns the state of the FIN flag. |
| 339 | * |
| 340 | * @return The state of the FIN flag. |
| 341 | */ |
| 342 | public boolean isFinalFlagSet() { |
| 343 | return fFINFlag; |
| 344 | } |
| 345 | |
| 346 | /** |
| 347 | * Getter method that returns the size of the windows, in windows size unit |
| 348 | * (by default, bytes), that the sender of this packet is willing to |
| 349 | * receive. |
| 350 | * |
| 351 | * @return The Window Size. |
| 352 | */ |
| 353 | public int getWindowSize() { |
| 354 | return fWindowSize; |
| 355 | } |
| 356 | |
| 357 | /** |
| 358 | * Getter method that returns the checksum of this packet. This checksum may |
| 359 | * be wrong if the packet is erroneous. |
| 360 | * |
| 361 | * @return The data and header checksum. |
| 362 | */ |
| 363 | public int getChecksum() { |
| 364 | return fChecksum; |
| 365 | } |
| 366 | |
| 367 | /** |
| 368 | * Getter method that returns the Urgent Pointer. If the URG flag is set, |
| 369 | * this field is an offset from the sequence number indicating the last |
| 370 | * urgent data byte. |
| 371 | * |
| 372 | * @return The Urgent Pointer. |
| 373 | */ |
| 374 | public int getUrgentPointer() { |
| 375 | return fUrgentPointer; |
| 376 | } |
| 377 | |
| 378 | /** |
| 379 | * Getter method that returns the options. This method returns null if no |
| 380 | * options are present. |
| 381 | * |
| 382 | * @return The options of the packet. |
| 383 | */ |
| 384 | public @Nullable byte[] getOptions() { |
| 385 | byte[] options = fOptions; |
| 386 | if (options == null) { |
| 387 | return null; |
| 388 | } |
| 389 | return Arrays.copyOf(options, options.length); |
| 390 | } |
| 391 | |
| 392 | @Override |
| 393 | public boolean validate() { |
| 394 | // Not yet implemented. ATM, we consider that all packets are valid. |
| 395 | // This is the case for all packets. |
| 396 | // TODO Implement it. |
| 397 | return true; |
| 398 | } |
| 399 | |
| 400 | @Override |
| 401 | public TCPEndpoint getSourceEndpoint() { |
| 402 | @Nullable |
| 403 | TCPEndpoint endpoint = fSourceEndpoint; |
| 404 | if (endpoint == null) { |
| 405 | endpoint = new TCPEndpoint(this, true); |
| 406 | } |
| 407 | fSourceEndpoint = endpoint; |
| 408 | return fSourceEndpoint; |
| 409 | } |
| 410 | |
| 411 | @Override |
| 412 | public TCPEndpoint getDestinationEndpoint() { |
| 413 | @Nullable |
| 414 | TCPEndpoint endpoint = fDestinationEndpoint; |
| 415 | |
| 416 | if (endpoint == null) { |
| 417 | endpoint = new TCPEndpoint(this, false); |
| 418 | } |
| 419 | fDestinationEndpoint = endpoint; |
| 420 | return fDestinationEndpoint; |
| 421 | } |
| 422 | |
| 423 | @Override |
| 424 | public Map<String, String> getFields() { |
| 425 | Map<String, String> map = fFields; |
| 426 | if (map == null) { |
| 427 | Builder<String, String> builder = ImmutableMap.<String, String> builder() |
| 428 | .put("Source Port", String.valueOf(fSourcePort)) //$NON-NLS-1$ |
| 429 | .put("Destination Port", String.valueOf(fDestinationPort)) //$NON-NLS-1$ |
| 430 | .put("Sequence Number", String.valueOf(fSequenceNumber)) //$NON-NLS-1$ |
| 431 | .put("Acknowledgement Number", String.valueOf(fAcknowledgmentNumber)) //$NON-NLS-1$ |
| 432 | .put("Length", String.valueOf(fDataOffset * TCPValues.BLOCK_SIZE) + " bytes") //$NON-NLS-1$ //$NON-NLS-2$ |
| 433 | .put("ECN-Nonce Flag", String.valueOf(fNSFlag)) //$NON-NLS-1$ |
| 434 | .put("Congestion Window Reduced Flag", String.valueOf(fCWRFlag)) //$NON-NLS-1$ |
| 435 | .put("ECN-Echo Flag", String.valueOf(fECEFlag)) //$NON-NLS-1$ |
| 436 | .put("Urgent Flag", String.valueOf(fURGFlag)) //$NON-NLS-1$ |
| 437 | .put("ACK Flag", String.valueOf(fACKFlag)) //$NON-NLS-1$ |
| 438 | .put("PSH Flag", String.valueOf(fPSHFlag)) //$NON-NLS-1$ |
| 439 | .put("RST Flag", String.valueOf(fRSTFlag)) //$NON-NLS-1$ |
| 440 | .put("SYN Flag", String.valueOf(fSYNFlag)) //$NON-NLS-1$ |
| 441 | .put("FIN Flag", String.valueOf(fFINFlag)) //$NON-NLS-1$ |
| 442 | .put("Window Size Value", String.valueOf(fWindowSize)) //$NON-NLS-1$ |
| 443 | .put("Checksum", String.format("%s%04x", "0x", fChecksum)) //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$ |
| 444 | .put("Urgent Pointer", String.format("%s%04x", "0x", fUrgentPointer)); //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$ |
| 445 | byte[] options = fOptions; |
| 446 | if (options == null) { |
| 447 | builder.put("Options", EMPTY_STRING); //$NON-NLS-1$ |
| 448 | } else { |
| 449 | builder.put("Options", ConversionHelper.bytesToHex(options, true)); //$NON-NLS-1$ |
| 450 | |
| 451 | } |
| 452 | fFields = checkNotNull(builder.build()); |
| 453 | return fFields; |
| 454 | } |
| 455 | return map; |
| 456 | } |
| 457 | |
| 458 | @Override |
| 459 | public String getLocalSummaryString() { |
| 460 | return "Src Port: " + fSourcePort + ", Dst Port: " + fDestinationPort + //$NON-NLS-1$ //$NON-NLS-2$ |
| 461 | ", Seq: " + fSequenceNumber + ", Ack: " + fAcknowledgmentNumber + //$NON-NLS-1$ //$NON-NLS-2$ |
| 462 | ", Len: " + (fDataOffset * TCPValues.BLOCK_SIZE); //$NON-NLS-1$ } |
| 463 | } |
| 464 | |
| 465 | @Override |
| 466 | protected String getSignificationString() { |
| 467 | StringBuilder sb = new StringBuilder(); |
| 468 | sb.append(fSourcePort) |
| 469 | .append(" > ") //$NON-NLS-1$ |
| 470 | .append(fDestinationPort); |
| 471 | |
| 472 | if (!(generateFlagString().equals(EMPTY_STRING))) { |
| 473 | sb.append(' ') |
| 474 | .append('[') |
| 475 | .append(generateFlagString()) |
| 476 | .append(']'); |
| 477 | } |
| 478 | sb.append(" Seq=") //$NON-NLS-1$ |
| 479 | .append(fSequenceNumber); |
| 480 | |
| 481 | if (fACKFlag) { |
| 482 | sb.append(" Ack=") //$NON-NLS-1$ |
| 483 | .append(fAcknowledgmentNumber); |
| 484 | } |
| 485 | |
| 486 | sb.append(" Len=") //$NON-NLS-1$ |
| 487 | .append((fDataOffset * TCPValues.BLOCK_SIZE)); |
| 488 | |
| 489 | String string = sb.toString(); |
| 490 | if (string == null) { |
| 491 | return EMPTY_STRING; |
| 492 | } |
| 493 | return string; |
| 494 | } |
| 495 | |
| 496 | private String generateFlagString() { |
| 497 | StringBuilder sb = new StringBuilder(); |
| 498 | boolean start = true; |
| 499 | |
| 500 | if (fSYNFlag) { |
| 501 | if (!start) { |
| 502 | sb.append(", "); //$NON-NLS-1$ |
| 503 | } |
| 504 | sb.append("SYN"); //$NON-NLS-1$ |
| 505 | start = false; |
| 506 | } |
| 507 | if (fACKFlag) { |
| 508 | if (!start) { |
| 509 | sb.append(", "); //$NON-NLS-1$ |
| 510 | } |
| 511 | sb.append("ACK"); //$NON-NLS-1$ |
| 512 | start = false; |
| 513 | } |
| 514 | if (fFINFlag) { |
| 515 | if (!start) { |
| 516 | sb.append(", "); //$NON-NLS-1$ |
| 517 | } |
| 518 | sb.append("FIN"); //$NON-NLS-1$ |
| 519 | start = false; |
| 520 | } |
| 521 | if (fRSTFlag) { |
| 522 | if (!start) { |
| 523 | sb.append(", "); //$NON-NLS-1$ |
| 524 | } |
| 525 | sb.append("RST"); //$NON-NLS-1$ |
| 526 | start = false; |
| 527 | } |
| 528 | if (fPSHFlag) { |
| 529 | if (!start) { |
| 530 | sb.append(", "); //$NON-NLS-1$ |
| 531 | } |
| 532 | sb.append("PSH"); //$NON-NLS-1$ |
| 533 | start = false; |
| 534 | } |
| 535 | if (fURGFlag) { |
| 536 | if (!start) { |
| 537 | sb.append(", "); //$NON-NLS-1$ |
| 538 | } |
| 539 | sb.append("URG"); //$NON-NLS-1$ |
| 540 | start = false; |
| 541 | } |
| 542 | if (fNSFlag) { |
| 543 | if (!start) { |
| 544 | sb.append(", "); //$NON-NLS-1$ |
| 545 | } |
| 546 | sb.append("NS"); //$NON-NLS-1$ |
| 547 | start = false; |
| 548 | } |
| 549 | if (fCWRFlag) { |
| 550 | if (!start) { |
| 551 | sb.append(", "); //$NON-NLS-1$ |
| 552 | } |
| 553 | sb.append("CWR"); //$NON-NLS-1$ |
| 554 | start = false; |
| 555 | } |
| 556 | if (fECEFlag) { |
| 557 | if (!start) { |
| 558 | sb.append(", "); //$NON-NLS-1$ |
| 559 | } |
| 560 | sb.append("ECE"); //$NON-NLS-1$ |
| 561 | start = false; |
| 562 | } |
| 563 | String string = sb.toString(); |
| 564 | if (string == null) { |
| 565 | return EMPTY_STRING; |
| 566 | } |
| 567 | return string; |
| 568 | } |
| 569 | |
| 570 | @Override |
| 571 | public int hashCode() { |
| 572 | final int prime = 31; |
| 573 | int result = 1; |
| 574 | result = prime * result + (fACKFlag ? 1231 : 1237); |
| 575 | result = prime * result + (int) (fAcknowledgmentNumber ^ (fAcknowledgmentNumber >>> 32)); |
| 576 | result = prime * result + (fCWRFlag ? 1231 : 1237); |
| 577 | result = prime * result + fChecksum; |
| 578 | final Packet child = fChildPacket; |
| 579 | if (child != null) { |
| 580 | result = prime * result + child.hashCode(); |
| 581 | } else { |
| 582 | result = prime * result; |
| 583 | } |
| 584 | result = prime * result + fDataOffset; |
| 585 | result = prime * result + fDestinationPort; |
| 586 | result = prime * result + (fECEFlag ? 1231 : 1237); |
| 587 | result = prime * result + (fFINFlag ? 1231 : 1237); |
| 588 | result = prime * result + (fNSFlag ? 1231 : 1237); |
| 589 | result = prime * result + Arrays.hashCode(fOptions); |
| 590 | result = prime * result + (fPSHFlag ? 1231 : 1237); |
| 591 | final ByteBuffer payload = fPayload; |
| 592 | if (payload != null) { |
| 593 | result = prime * result + payload.hashCode(); |
| 594 | } else { |
| 595 | result = prime * result; |
| 596 | } |
| 597 | result = prime * result + (fRSTFlag ? 1231 : 1237); |
| 598 | result = prime * result + fReservedField; |
| 599 | result = prime * result + (fSYNFlag ? 1231 : 1237); |
| 600 | result = prime * result + (int) (fSequenceNumber ^ (fSequenceNumber >>> 32)); |
| 601 | result = prime * result + fSourcePort; |
| 602 | result = prime * result + (fURGFlag ? 1231 : 1237); |
| 603 | result = prime * result + fUrgentPointer; |
| 604 | result = prime * result + fWindowSize; |
| 605 | return result; |
| 606 | } |
| 607 | |
| 608 | @Override |
| 609 | public boolean equals(@Nullable Object obj) { |
| 610 | if (this == obj) { |
| 611 | return true; |
| 612 | } |
| 613 | if (obj == null) { |
| 614 | return false; |
| 615 | } |
| 616 | if (getClass() != obj.getClass()) { |
| 617 | return false; |
| 618 | } |
| 619 | TCPPacket other = (TCPPacket) obj; |
| 620 | if (fACKFlag != other.fACKFlag) { |
| 621 | return false; |
| 622 | } |
| 623 | if (fAcknowledgmentNumber != other.fAcknowledgmentNumber) { |
| 624 | return false; |
| 625 | } |
| 626 | if (fCWRFlag != other.fCWRFlag) { |
| 627 | return false; |
| 628 | } |
| 629 | if (fChecksum != other.fChecksum) { |
| 630 | return false; |
| 631 | } |
| 632 | final Packet child = fChildPacket; |
| 633 | if (child != null) { |
| 634 | if (!child.equals(other.fChildPacket)) { |
| 635 | return false; |
| 636 | } |
| 637 | } else { |
| 638 | if (other.fChildPacket != null) { |
| 639 | return false; |
| 640 | } |
| 641 | } |
| 642 | |
| 643 | if (fDataOffset != other.fDataOffset) { |
| 644 | return false; |
| 645 | } |
| 646 | if (fDestinationPort != other.fDestinationPort) { |
| 647 | return false; |
| 648 | } |
| 649 | if (fECEFlag != other.fECEFlag) { |
| 650 | return false; |
| 651 | } |
| 652 | if (fFINFlag != other.fFINFlag) { |
| 653 | return false; |
| 654 | } |
| 655 | if (fNSFlag != other.fNSFlag) { |
| 656 | return false; |
| 657 | } |
| 658 | if (!Arrays.equals(fOptions, other.fOptions)) { |
| 659 | return false; |
| 660 | } |
| 661 | if (fPSHFlag != other.fPSHFlag) { |
| 662 | return false; |
| 663 | } |
| 664 | final ByteBuffer fPayload2 = fPayload; |
| 665 | if (fPayload2 != null) { |
| 666 | if (!fPayload2.equals(other.fPayload)) { |
| 667 | return false; |
| 668 | } |
| 669 | } else { |
| 670 | if (other.fPayload != null) { |
| 671 | return false; |
| 672 | } |
| 673 | } |
| 674 | if (fRSTFlag != other.fRSTFlag) { |
| 675 | return false; |
| 676 | } |
| 677 | if (fReservedField != other.fReservedField) { |
| 678 | return false; |
| 679 | } |
| 680 | if (fSYNFlag != other.fSYNFlag) { |
| 681 | return false; |
| 682 | } |
| 683 | if (fSequenceNumber != other.fSequenceNumber) { |
| 684 | return false; |
| 685 | } |
| 686 | if (fSourcePort != other.fSourcePort) { |
| 687 | return false; |
| 688 | } |
| 689 | if (fURGFlag != other.fURGFlag) { |
| 690 | return false; |
| 691 | } |
| 692 | if (fUrgentPointer != other.fUrgentPointer) { |
| 693 | return false; |
| 694 | } |
| 695 | if (fWindowSize != other.fWindowSize) { |
| 696 | return false; |
| 697 | } |
| 698 | return true; |
| 699 | } |
| 700 | |
| 701 | } |