senf/Packets/DefaultBundle/IPv4Packet.cc

   1 // $Id$
   2 //
   3 // Copyright (C) 2006
   4 // Fraunhofer Institute for Open Communication Systems (FOKUS)
   5 // Competence Center NETwork research (NET), St. Augustin, GERMANY
   6 //     Stefan Bund <g0dil@berlios.de>
   7 //
   8 // This program is free software; you can redistribute it and/or modify
   9 // it under the terms of the GNU General Public License as published by
  10 // the Free Software Foundation; either version 2 of the License, or
  11 // (at your option) any later version.
  12 //
  13 // This program is distributed in the hope that it will be useful,
  14 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 // GNU General Public License for more details.
  17 //
  18 // You should have received a copy of the GNU General Public License
  19 // along with this program; if not, write to the
  20 // Free Software Foundation, Inc.,
  21 // 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  22
  23 /** \file
  24     \brief IPv4Packet non-inline non-template implementation */
  25
  26 #include "IPv4Packet.hh"
  27 //#include "IPv4Packet.ih"
  28
  29 // Custom includes
  30 #include <iomanip>
  31 #include <sys/socket.h>
  32 #include <netinet/in.h>
  33 #include <arpa/inet.h>
  34 #include <boost/io/ios_state.hpp>
  35 #include <senf/Utils/IpChecksum.hh>
  36 #include "EthernetPacket.hh"
  37
  38 #define prefix_
  39 ///////////////////////////////cc.p////////////////////////////////////////
  40
  41 namespace {
  42     SENF_PACKET_REGISTRY_REGISTER( senf::EtherTypes, 0x0800, senf::IPv4Packet);
  43     SENF_PACKET_REGISTRY_REGISTER( senf::IpTypes,    4,      senf::IPv4Packet); // IP-in-IP encapsulation
  44 }
  45
  46 ///////////////////////////////////////////////////////////////////////////
  47 // senf::IPv4PacketParser
  48
  49 prefix_ boost::uint16_t senf::IPv4PacketParser::calcChecksum()
  50     const
  51 {
  52     validate(bytes(*this));
  53     IpChecksum summer;
  54     summer.feed( i(),                   i()+checksum_offset );
  55     summer.feed( i()+checksum_offset+2, i()+bytes(*this)    );
  56     return summer.sum();
  57 }
  58
  59 ///////////////////////////////////////////////////////////////////////////
  60 // senf::IPv4PacketType
  61
  62 prefix_ void senf::IPv4PacketType::dump(packet p, std::ostream & os)
  63 {
  64     boost::io::ios_all_saver ias(os);
  65     os << "Internet protocol Version 4:\n"
  66        << senf::fieldName("version")                   << p->version() << "\n"
  67        << senf::fieldName("ip header length")          << p->ihl() << "\n"
  68        << senf::fieldName("tos")                       << unsigned(p->tos()) << "\n"
  69        << senf::fieldName("length")                    << p->length() << "\n"
  70        << senf::fieldName("identifier")                << p->identifier() << "\n"
  71        << senf::fieldName("dont fragment")             << p->df() << "\n"
  72        << senf::fieldName("more fragments")            << p->mf() << "\n"
  73        << senf::fieldName("fragment")                  << p->frag() << "\n"
  74        << senf::fieldName("ttl")                       << unsigned(p->ttl()) << "\n"
  75        << senf::fieldName("protocol")                  << unsigned(p->protocol()) << "\n"
  76        << senf::fieldName("checksum")
  77        << "0x" << std::hex << std::setw(4) << std::setfill('0') << p->checksum() << std::dec << "\n"
  78        << senf::fieldName("source")                    << p->source() << "\n"
  79        << senf::fieldName("destination")               << p->destination() << "\n";
  80 }
  81
  82 prefix_ void senf::IPv4PacketType::finalize(packet p)
  83 {
  84     p->length()   << p.size();
  85     p->protocol() << key(p.next(nothrow));
  86     p->checksum() << p->calcChecksum();
  87 }
  88
  89 ///////////////////////////////cc.e////////////////////////////////////////
  90 #undef prefix_
  91
  92 \f
  93 // Local Variables:
  94 // mode: c++
  95 // fill-column: 100
  96 // c-file-style: "senf"
  97 // indent-tabs-mode: nil
  98 // ispell-local-dictionary: "american"
  99 // compile-command: "scons -u test"
 100 // comment-column: 40
 101 // End: