INet4Address.cci

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// $Id: INet4Address.cci 1742 2010-11-04 14:51:56Z g0dil $
//
// Copyright (C) 2007
// Fraunhofer (FOKUS)
// Competence Center NETwork research (NET), St. Augustin, GERMANY
//     Stefan Bund <g0dil@berlios.de>
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the
// Free Software Foundation, Inc.,
// 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.

// Custom includes

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

//-/////////////////////////////////////////////////////////////////////////////////////////////////
// senf::INet4Address

prefix_ senf::INet4Address::INet4Address()
{
    std::fill(begin(), end(), 0u);
}

prefix_ senf::INet4Address::INet4Address(senf::NoInit_t)
{}

prefix_ senf::INet4Address senf::INet4Address::from_inaddr(inaddr_type v)
{
    return INet4Address(v,IsInAddr);
}

prefix_ senf::INet4Address::inaddr_type & senf::INet4Address::iref()
{
    return *static_cast<inaddr_type *>(static_cast<void *>((&(*this)[0])));
}

prefix_ senf::INet4Address::inaddr_type senf::INet4Address::iref()
    const
{
    return *static_cast<inaddr_type const *>(static_cast<void const *>(&(*this)[0]));
}

prefix_ senf::INet4Address::inaddr_type senf::INet4Address::inaddr()
    const
{
    return iref();
}

prefix_ senf::INet4Address::INet4Address(inaddr_type addr, InAddr_t)
{
    iref() = addr;
}

prefix_ bool senf::INet4Address::broadcast()
    const
{
    return inaddr() == 0xFFFFFFFFu;
}

prefix_ bool senf::INet4Address::boolean_test()
    const
{
    return inaddr();
}

//-/////////////////////////////////////////////////////////////////////////////////////////////////
// senf::INet4Network

prefix_ unsigned senf::INet4Network::prefix_len()
    const
{
    return prefix_len_;
}

//-/////////////////////////////////////////////////////////////////////////////////////////////////
// private members

prefix_ boost::uint32_t senf::INet4Network::mask()
    const
{
    // This is correct as long as the system is using 2-complement arithmetic ...
    return (~((boost::uint32_t(1u)<<(32u-prefix_len()))-1u)) & 0xFFFFFFFFu;
}

//-/////////////////////////////////////////////////////////////////////////////////////////////////
// public members

prefix_ senf::INet4Network::INet4Network()
    : prefix_len_(), address_()
{}

prefix_ senf::INet4Network::INet4Network(INet4Address const & address, unsigned prefix_len)
    : prefix_len_(prefix_len), address_(INet4Address(address.address() & mask()))
{}

prefix_ senf::INet4Address const & senf::INet4Network::address()
    const
{
    return address_;
}

prefix_ bool senf::INet4Network::boolean_test()
    const
{
    return address() || prefix_len();
}

prefix_ bool senf::INet4Network::operator==(INet4Network const & other)
    const
{
    return address() == other.address() && prefix_len() == other.prefix_len();
}

prefix_ bool senf::INet4Network::match(INet4Address const & addr)
    const
{
    return (addr.address() & mask()) == address_.address();
}

prefix_ bool senf::INet4Network::match(INet4Network const & net)
    const
{
    return net.prefix_len() >= prefix_len() && match(net.address());
}

prefix_ senf::INet4Address senf::INet4Network::host(boost::uint32_t number)
{
    return INet4Address(address_.address() | (number & ~mask()));
}

prefix_ senf::INet4Network senf::INet4Network::subnet(boost::uint32_t net, unsigned prefix_len)
{
    return INet4Network(host(net << (32-prefix_len)),prefix_len);
}

//-/////////////////////////////////////////////////////////////////////////////////////////////////
// namespace members

prefix_ std::ostream & senf::operator<<(std::ostream & os, INet4Network const & addr)
{
    os << addr.address() << '/' << addr.prefix_len();
    return os;
}

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


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