Examples of org.jnetpcap.packet.JPacket

org.jnetpcap.packet.JPacket
A native packet buffer object. This class references both packet data buffer and decoded native packet structure. JPacket class is a subclass of a more general JBuffer providing full access to raw packet buffer data. It also has a reference to JPacket.State object which is peered, associated with, a native packet state structure generated by the packet scanner, the JScanner.
The packet interface provides numerous methods for accessing the decoded information. To check if any particular header is found within the packet's data buffer at the time the packet was scanned, the user can use {@link #hasHeader} methods. The method returns true if a particular header isfound within the packet data buffer, otherwise false. A convenience method {@link #hasHeader(JHeader)} exists that performs both an existance check andinitializes the header instace supplied to point at the header within the packet.

There are also numerous peer and deep copy methods. The peering methods do not copy any buffers but simply re-orient the pointers to point at the source peer structures to destination peer. The deep copy methods do copy physical data out of buffers and entire structures using native copy functions, not in java space.
@author Mark Bednarczyk @author Sly Technologies, Inc.


  /**
   * Test802dot3 trailer.
   */
  public void test802dot3Trailer() {
    JPacket packet =
        new JMemoryPacket(JProtocol.IEEE_802DOT3_ID,
            VariousInMemoryPackets.PACKET_2_TRAILER);
    
//    System.out.println(packet.getHeader(new IEEE802dot3()));
    System.out.println(packet);
    System.out.println(packet.getState().toDebugString());
  }

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  /**
   * Test arp.
   */
  public void testArp() {
    JPacket packet = super.getPcapPacket(VLAN, 189 - 1);
    
    assertTrue(packet.hasHeader(JProtocol.ARP_ID));
    
    Arp arp = new Arp();
    assertTrue(packet.hasHeader(arp));
    assertEquals(Arp.OpCode.REQUEST, arp.operationEnum());
    System.out.println(packet);
  }

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   *           the registry header errors
   */
  public void SKIPtestRip1() throws RegistryHeaderErrors {
    final int RIP1_ID = JRegistry.register(Rip1.class);
    
    JPacket packet = super.getPcapPacket(RIP_V1, 1 - 1);
    
    assertTrue(packet.hasHeader(RIP1_ID));
    
    Rip1 rip = new Rip1();
    
    System.out.println(packet);

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  /**
   * Test ip4 cr c16 pkt1.
   */
  public void testIp4CRC16Pkt1() {


    JPacket packet = super.getPcapPacket(TestUtils.L2TP, 0);
    Ip4 ip = packet.getHeader(new Ip4());


    int computed = Checksum.inChecksum(ip, 0, ip.size());


    System.out.printf("1chunk=%x\n", computed);
    System.out.printf("shoudbe=%x checksum=%x\n", Checksum.inChecksumShouldBe(

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  /**
   * Test ip4 cr c16 pkt2.
   */
  public void testIp4CRC16Pkt2() {


    JPacket packet = super.getPcapPacket(TestUtils.L2TP, 1);
    Ip4 ip = packet.getHeader(new Ip4());


    assertEquals(ip.calculateChecksum(), ip.checksum());
  }

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  /**
   * Test ip4 cr c16 pkt50.
   */
  public void testIp4CRC16Pkt50() {


    JPacket packet = super.getPcapPacket(TestUtils.L2TP, 46 - 1);
    Ip4 ip = packet.getHeader(new Ip4());


    int crc;
    assertEquals(ip.checksum(), ip.calculateChecksum());


    // System.out.printf("ip.crc=%x computed=%x\n", ip.checksum(), crc);

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  /**
   * Test ip4 fragment flag directly.
   */
  public void testIp4FragmentFlagDirectly() {
    JPacket packet = TestUtils.getPcapPacket(TestUtils.REASEMBLY, 1 - 1);
    Ethernet eth = new Ethernet();


    if (packet.hasHeader(eth)) {
      // System.out.println(eth);
      // System.out.printf("flags=%x\n", eth.getState().getFlags());
      assertNotSame(JHeader.State.FLAG_HEADER_FRAGMENTED, (eth.getState()
          .getFlags() & JHeader.State.FLAG_HEADER_FRAGMENTED));
    }


    Ip4 ip = new Ip4();
    if (packet.hasHeader(ip)) {
      // System.out.println(ip);
      // System.out.printf("flags=%x\n", ip.getState().getFlags());
      assertEquals(JHeader.State.FLAG_HEADER_FRAGMENTED, (ip.getState()
          .getFlags() & JHeader.State.FLAG_HEADER_FRAGMENTED));
    }


    Icmp icmp = new Icmp();
    if (packet.hasHeader(icmp)) {
      // System.out.println(icmp);
      // System.out.printf("flags=%x\n", icmp.getState().getFlags());
      assertEquals(JHeader.State.FLAG_HEADER_FRAGMENTED, (icmp.getState()
          .getFlags() & JHeader.State.FLAG_HEADER_FRAGMENTED));
    }

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  /**
   * Test j header is fragmented.
   */
  public void testJHeaderIsFragmented() {
    JPacket packet = TestUtils.getPcapPacket(TestUtils.REASEMBLY, 1 - 1);
    Ethernet eth = new Ethernet();


    if (packet.hasHeader(eth)) {
      assertFalse(eth.isFragmented());
    }


    Ip4 ip = new Ip4();
    if (packet.hasHeader(ip)) {
      assertTrue(ip.isFragmented());
    }


    Icmp icmp = new Icmp();
    if (packet.hasHeader(icmp)) {
      assertTrue(ip.isFragmented());
    }


  }

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  /**
   * Test tcp options.
   */
  public void testTcpOptions() {
    JPacket packet = TestUtils.getPcapPacket(SMALL_IMAP, 1 - 1);
    System.out.println(packet.toString());
    
    Tcp tcp = packet.getHeader(new Tcp());
    Tcp.Timestamp ts = new Tcp.Timestamp();
    
    if (tcp.hasSubHeader(ts)) {
      System.out.printf("tsval=%d tsecr=%d%n", ts.tsval(), ts.tsecr());
    }

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            + "31 04 69 61  67 72 03 6e  65 74 00 00  01 00 01 c0"
            + "17 00 06 00  01 00 00 2a  30 00 2f 05  70 64 6e 73"
            + "31 08 75 6c  74 72 61 64  6e 73 c0 1c  07 6b 67 72"
            + "61 75 65 72  c0 17 77 bf  dd f5 00 00  2a 30 00 00"
            + "0e 10 00 27  8d 00 00 01  51 80" + "";
    final JPacket packet = new JMemoryPacket(JProtocol.ETHERNET_ID, data);


    // final String TEMP_CAP = "tests/temp.pcap";
    // final File TEMP_CAP_FILE = new File(TEMP_CAP);
    // if (TEMP_CAP_FILE.exists()) {
    // TEMP_CAP_FILE.delete();
    // }
    // FormatUtils.createPcapFile(TEMP_CAP, data);


    // System.out.println(packet);
    System.out.println(packet.getHeader(new Ethernet()));
    System.out.println(packet.getHeader(new Ip4()));
    System.out.println(packet.getHeader(new Udp()));
    System.out.println(packet.getState().toDebugString());


  }

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Related Classes of org.jnetpcap.packet.JPacket

org.jnetpcap.bugs.Bug2818101_RtpHeaderLength_Invalid

org.jnetpcap.format.TestFormatter

org.jnetpcap.header.TestAnotatedDefinition

org.jnetpcap.header.TestPeering

org.jnetpcap.header.TestSubHeader

org.jnetpcap.newstuff.IEEE802dot11_RADIOTAP

org.jnetpcap.newstuff.TestHttp2

org.jnetpcap.protocol.lan.Ethernet

org.jnetpcap.protocol.lan.IEEE802dot3

org.jnetpcap.protocol.TestLan

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