IPv4Packet.cc

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//
// Copyright (c) 2020 Fraunhofer Institute for Applied Information Technology (FIT)
//                    Network Research Group (NET)
//                    Schloss Birlinghoven, 53754 Sankt Augustin, GERMANY
//                    Contact: support@wiback.org
//
// This file is part of the SENF code tree.
// It is licensed under the 3-clause BSD License (aka New BSD License).
// See LICENSE.txt in the top level directory for details or visit
// https://opensource.org/licenses/BSD-3-Clause
//


#include "IPv4Packet.hh"
//#include "IPv4Packet.ih"

// Custom includes
#include <iomanip>
#include <boost/io/ios_state.hpp>
#include <senf/Utils/IpChecksum.hh>
#include "Registries.hh"

#define prefix_
//-/////////////////////////////////////////////////////////////////////////////////////////////////

SENF_PACKET_REGISTRY_REGISTER( senf::EtherTypes, senf::IPv4PacketType::etherType, senf::IPv4Packet);
SENF_PACKET_REGISTRY_REGISTER( senf::IPTypes,    4,                               senf::IPv4Packet); // IP-in-IP encapsulation

SENF_PACKET_INSTANTIATE_TEMPLATE( senf::IPv4Packet );

//-/////////////////////////////////////////////////////////////////////////////////////////////////
// senf::IPv4PacketParser

prefix_ boost::uint16_t senf::IPv4PacketParser::calcChecksum()
    const
{
    validate(bytes(*this));
    IpChecksum summer;
    summer.feed( i(),                   i()+checksum_offset );
    summer.feed( i()+checksum_offset+2, i()+bytes(*this)    );
    return summer.sum();
}

//-/////////////////////////////////////////////////////////////////////////////////////////////////
// senf::IPv4PacketType

prefix_ void senf::IPv4PacketType::dump(packet p, std::ostream & os)
{
    boost::io::ios_all_saver ias(os);
    os << "Internet protocol Version 4:\n"
       << senf::fieldName("version")          << p->version() << "\n"
       << senf::fieldName("ip header length") << p->ihl() << "\n"
       << senf::fieldName("dscp")             << (p->dscp()) << "\n"
       << senf::fieldName("ecn")              << (p->ecn()) << "\n"
       << senf::fieldName("length")           << p->length() << "\n"
       << senf::fieldName("identifier")       << p->identifier() << "\n"
       << senf::fieldName("dont fragment")    << p->df() << "\n"
       << senf::fieldName("more fragments")   << p->mf() << "\n"
       << senf::fieldName("fragment")         << p->frag() << "\n"
       << senf::fieldName("ttl")              << unsigned(p->ttl()) << "\n"
       << senf::fieldName("protocol")         << unsigned(p->protocol()) << "\n"
       << senf::fieldName("checksum")
       << "0x" << std::hex << std::setw(4) << std::setfill('0') << std::right << p->checksum() << std::dec << "\n"
       << senf::fieldName("source")           << p->source() << "\n"
       << senf::fieldName("destination")      << p->destination() << "\n";
}

prefix_ void senf::IPv4PacketType::finalize(packet p)
{
    p->length()   << p.size();
    p->protocol() << key(p.next(nothrow));
    p->checksum() << p->calcChecksum();
}

//-/////////////////////////////////////////////////////////////////////////////////////////////////
#undef prefix_


// Local Variables:
// mode: c++
// fill-column: 100
// c-file-style: "senf"
// indent-tabs-mode: nil
// ispell-local-dictionary: "american"
// compile-command: "scons -u test"
// comment-column: 40
// End: