Examples of org.jnetpcap.packet.JPacket$State

org.jnetpcap.packet.JPacket
map of presence of headers char *pkt_data; // packet data buffer int32_t pkt_header_count; // total number of headers found // Keep track of how many instances of each header we have uint8_t pkt_instance_counts[MAX_ID_COUNT]; header_t pkt_headers[]; // One per header + 1 more for payload } packet_t; and struct header_t
```
 typedef struct header_t { int32_t hdr_id; // header ID uint32_t hdr_offset; // offset into the packet_t->data buffer int32_t hdr_length; // length of the header in packet_t->data buffer } header_t; 
```
The methods in this State provide 3 sets of functions. Looking up global state of the packet found in packet_state_t structure, looking up header information in struct header_t by header ID retrieved from JRegistry and instance numbers, looking up header information by direct indexes into native maps and arrays. Instance numbers specify which instance of the header, if more than 1 exists in a packet. For example if there is a packet with 2 Ip4 headers such as
```
 Ethernet->Ip4->Snmp->Ip4  or  Ethernet->Ip4->Ip4 (IP tunneled IP) 
```
the first Ip4 header is instance 0 and the second Ip4 header is instance 2. You can use the method {@link #getInstanceCount(int)} to learn how manyinstance headers exists. That information is stored in the packet_state_t structure for efficiency.
@author Mark Bednarczyk @author Sly Technologies, Inc.

    Ip4.Timestamp ts = new Ip4.Timestamp();
    Ip4.LooseSourceRoute lsroute = new Ip4.LooseSourceRoute();
    Ip4.StrictSourceRoute ssroute = new Ip4.StrictSourceRoute();
    Ip4.RecordRoute record = new Ip4.RecordRoute();


    JPacket packet =
        TestUtils.getPcapPacket("tests/test-icmp-recordroute-opt.pcap", 0);


    if (packet.hasHeader(ip) && ip.hasSubHeaders()) {


      if (ip.hasSubHeader(lsroute)) {
        System.out.println("LooseSource");
      }

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   * 
   * @throws IOException
   *           Signals that an I/O exception has occurred.
   */
  public void test1() throws IOException {
    JPacket packet =
        TestUtils.getPcapPacket("tests/test-icmp-recordroute-opt.pcap", 0);
    assertNotNull(packet);


    TextFormatter out = new TextFormatter(System.out);
    out.format(packet);


    System.out.println(packet.toString());


    System.out.println(packet.getState().toHexdump());
    System.out.println(packet.getState().toDebugString());
  }

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  /**
   * _test1.
   */
  public void _test1() {


    JPacket packet = TestUtils.getPcapPacket("tests/test-afs.pcap", 0);


    MyHeader my = new MyHeader();


    if (packet.hasHeader(my) && my.version() == 4) {
      System.out.printf("found it id=%d\n", my.getId());


      System.out.println(packet.toString());
    } else {
      System.out.printf("not found id=%d\n", my.getId());
    }
  }

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      System.out.printf("field=%s\n", field.toString());
    }


    Ip4 ip = new Ip4();


    JPacket packet = TestUtils.getPcapPacket("tests/test-afs.pcap", 0);


    if (packet.hasHeader(JProtocol.IP4_ID)) {
      ip = packet.getHeader(ip);
      JFormatter out = new TextFormatter(System.out);
      out.format(ip, Detail.MULTI_LINE_FULL_DETAIL);
    }


  }

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  /**
   * Test peer to j buffer.
   */
  public void testPeerToJBuffer() {
    assertNotNull(VariousInMemoryPackets.PACKET_1);
    JPacket packet = new JMemoryPacket(VariousInMemoryPackets.PACKET_1);
    packet.scan(Ethernet.ID);
    
    System.out.println(packet);
  }

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   *           Signals that an I/O exception has occurred.
   */
  public void testTextFormatter() throws IOException {
    JFormatter out = new TextFormatter(OUT);
    
    JPacket packet = TestUtils.getPcapPacket("tests/test-vlan.pcap", 0);
    try {
      out.format(packet);
      
    } catch (Exception e) {
      e.printStackTrace();

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   *           Signals that an I/O exception has occurred.
   */
  public void testXmlFormatter() throws IOException {
    JFormatter out = new XmlFormatter(OUT);
    
    JPacket packet = TestUtils.getPcapPacket("tests/test-afs.pcap", 0);


    out.format(packet);
  }

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   *           Signals that an I/O exception has occurred.
   */
  public void testXmlIp4RecordRouteOpt() throws IOException {
    JFormatter out = new XmlFormatter(OUT);
    
    JPacket packet = TestUtils.getPcapPacket("tests/test-icmp-recordroute-opt.pcap", 0);


    out.format(packet);
  }

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   *           Signals that an I/O exception has occurred.
   */
  public void testSubHeader() throws IOException {
    JFormatter out = new TextFormatter(OUT);
    
    JPacket packet = TestUtils.getPcapPacket("tests/test-afs.pcap", 0);


    out.format(packet);
  }

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   * 
   * @throws UnknownHostException
   *           the unknown host exception
   */
  public void testSendPacketUsingJBuffer() throws UnknownHostException {
    JPacket packet =
        new JMemoryPacket(JProtocol.ETHERNET_ID,
            "0016b6c13cb10021 5db0456c08004500 "
                + "00340e8e40008006 9c54c0a80165d822 "
                + "b5b1c1cf005020ce 4303000000008002 "
                + "2000d94300000204 05b4010303020101 " + "0402");


    InetAddress dst = InetAddress.getByName("201.1.1.1");
    InetAddress src = InetAddress.getByName("192.168.1.1");


    Ip4 ip = packet.getHeader(new Ip4());
    Tcp tcp = packet.getHeader(new Tcp());


    ip.destination(dst.getAddress());
    ip.source(src.getAddress());


    ip.checksum(ip.calculateChecksum());
    tcp.checksum(tcp.calculateChecksum());
    packet.scan(Ethernet.ID);


    System.out.println(packet);
    List<PcapIf> alldevs = new ArrayList<PcapIf>(); // Will be filled with NICs
    StringBuilder errbuf = new StringBuilder(); // For any error msgs
    /***************************************************************************

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