include/wipal/wifi/unique_id/hash.hh

/*
 * WiPal - A library and a set of tools to manipulate wireless traces.
 * Copyright (C) 2008, 2009  Universite Pierre et Marie Curie - Paris 6
 *
 * 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., 51 Franklin Street, Fifth Floor, Boston,
 * MA  02110-1301  USA
 *
 * Author: Thomas Claveirole <thomas.claveirole@lip6.fr>
 */
#ifndef WIFI_HASH_HH_
# define WIFI_HASH_HH_

# include <openssl/md5.h>
# include <boost/array.hpp>

# include <wipal/wifi/unique_id/unique_id.hh>
# include <wipal/proto/udp.hh>
# include <wipal/proto/icmp6.hh>
# include <wipal/proto/ip4.hh>
# include <wipal/proto/ip6.hh>

namespace wpl
{

  namespace wifi
  {

    namespace internals
    {

      struct hash_value: public boost::array<unsigned char, MD5_DIGEST_LENGTH>
      {
        hash_value(const void* data, size_t len);
      };

      bool      unique_udp(const   udp::header*   const, const size_t);
      bool      unique_icmp6(const icmp6::header* const, const size_t);

      bool      unique_ip4(const ip4::header* const     header,
                           const size_t                 caplen,
                           const ip4::addr* const       ignore = 0);

      bool      unique_ip6(const ip6::header* const     header,
                           const size_t                 caplen,
                           const ip6::addr* const       ignore = 0);

      struct hsh_80211_tag      {};
      struct hsh_80211_x_tag    {};
      struct hsh_en2_tag        {};

    } // End of namespace wpl::wifi::internals.

    typedef     unique_id<internals::hash_value,
                          internals::empty<internals::hsh_80211_tag> >
                hsh_80211_id;

    typedef     unique_id<internals::hash_value,
                          internals::empty<internals::hsh_80211_x_tag> >
                hsh_80211_x_id;

    typedef     unique_id<internals::hash_value,
                          internals::empty<internals::hsh_en2_tag> >
                hsh_en2_id;

    template <>
    struct unique_id_factory<hsh_80211_id>
    {
      template <class HeaderType, class S>
      boost::optional<hsh_80211_id>
      build(const pkt::packet<S>&       packet,
            addr_mapping&               mapping);
    };

    template <>
    struct unique_id_factory<hsh_80211_x_id>
    {
      template <class HeaderType, class S>
      boost::optional<hsh_80211_x_id>
      build(const pkt::packet<S>&       packet,
            addr_mapping&               mapping);
    };

    template <>
    struct unique_id_factory<hsh_en2_id>
    {
      template <class HeaderType, class S>
      boost::optional<hsh_en2_id>
      build(const pkt::packet<S>&       packet,
            addr_mapping&               mapping);
    };

  } // End of namespace wpl::wifi.

} // End of namespace wpl.

WP_HASH_NAMESPACE_BEGIN

  template <>
  struct hash< wpl::wifi::internals::hash_value >
  {
    size_t
    operator () (const wpl::wifi::internals::hash_value&) const;
  };

WP_HASH_NAMESPACE_END

# include "hash.hxx"

#endif // ! WIFI_HASH_HH_

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