developer.intra2net.com Git - pingcheck/blob - src/ip/ipv4header.h

   1 // Copyright (c) 2003-2010 Christopher M. Kohlhoff
   2 // Modifications (c) 2011 by Guilherme Maciel Ferreira / Intra2net AG
   3 //
   4 // Distributed under the Boost Software License, Version 1.0.
   5 //    (See accompanying file LICENSE_1_0.txt or copy at
   6 //          http://www.boost.org/LICENSE_1_0.txt)
   7 #ifndef IPV4_HEADER_H
   8 #define IPV4_HEADER_H
   9
  10 #include <stdint.h>
  11
  12 #include <boost/asio/ip/address_v4.hpp>
  13
  14 #include "ip/ipheader.h"
  15
  16 //-----------------------------------------------------------------------------
  17 // Ipv4Header
  18 //-----------------------------------------------------------------------------
  19
  20 /**
  21  * @brief This class represents the IP version 4 Packet Header.
  22  *
  23  * The IPv4 header format is:
  24  *
  25  * @code
  26  * 0      3 4     7 8            15 16                           31
  27  * +-------+-------+---------------+------------------------------+      ---
  28  * |       |       |               |                              |       ^
  29  * |version|header | differentiated|    total length in bytes     |       |
  30  * |  (4)  | length|    services   |                              |       |
  31  * +-------+-------+---------------+-+-+-+------------------------+       |
  32  * |                               | | | |                        |       |
  33  * |        identification         |0|D|M|    fragment offset     |       |
  34  * |                               | |F|F|                        |       |
  35  * +---------------+---------------+-+-+-+------------------------+       |
  36  * |               |               |                              |       |
  37  * | time to live  |   protocol    |       header checksum        |   20 bytes
  38  * |               |               |                              |       |
  39  * +---------------+---------------+------------------------------+       |
  40  * |                                                              |       |
  41  * |                      source IPv4 address                     |       |
  42  * |                                                              |       |
  43  * +--------------------------------------------------------------+       |
  44  * |                                                              |       |
  45  * |                   destination IPv4 address                   |       |
  46  * |                                                              |       v
  47  * +--------------------------------------------------------------+      ---
  48  * |                                                              |       ^
  49  * |                                                              |       |
  50  * /                        options (if any)                      /    0 - 40
  51  * /                                                              /     bytes
  52  * |                                                              |       |
  53  * |                                                              |       v
  54  * +--------------------------------------------------------------+      ---
  55  * @endcode
  56  */
  57 class Ipv4Header : public IpHeader
  58 {
  59 public:
  60     Ipv4Header();
  61
  62     uint8_t get_version() const;
  63     uint16_t get_header_length() const;
  64     uint8_t get_differentiated_services() const;
  65     uint16_t get_total_length() const;
  66
  67     uint16_t get_identification() const;
  68     bool dont_fragment() const;
  69     bool more_fragments() const;
  70     uint16_t get_fragment_offset() const;
  71
  72     uint8_t get_time_to_live() const;
  73     uint8_t get_protocol() const;
  74     uint16_t get_header_checksum() const;
  75
  76     boost::asio::ip::address get_source_address() const;
  77     boost::asio::ip::address get_destination_address() const;
  78
  79     friend std::istream &operator>>(
  80             std::istream &is,
  81             Ipv4Header &header
  82     );
  83
  84 };
  85
  86 #endif // IPV4_HEADER_H