Wiselib
wiselib.testing/algorithms/crypto/eschenauer_gligor/eschenauer_gligor_message.h
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00001 /***************************************************************************
00002  ** This file is part of the generic algorithm library Wiselib.           **
00003  ** Copyright (C) 2008,2009 by the Wisebed (www.wisebed.eu) project.      **
00004  **                                                                       **
00005  ** The Wiselib is free software: you can redistribute it and/or modify   **
00006  ** it under the terms of the GNU Lesser General Public License as        **
00007  ** published by the Free Software Foundation, either version 3 of the    **
00008  ** License, or (at your option) any later version.                       **
00009  **                                                                       **
00010  ** The Wiselib is distributed in the hope that it will be useful,        **
00011  ** but WITHOUT ANY WARRANTY; without even the implied warranty of        **
00012  ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         **
00013  ** GNU Lesser General Public License for more details.                   **
00014  **                                                                       **
00015  ** You should have received a copy of the GNU Lesser General Public      **
00016  ** License along with the Wiselib.                                       **
00017  ** If not, see <http://www.gnu.org/licenses/>.                           **
00018  **                                                                       **
00019  ** Improved by: Christoph Knecht, University of Bern 2010                **
00020  ***************************************************************************/
00021 #ifndef ESCHENAUER_GLIGOR_MESSAGE_H
00022 #define ESCHENAUER_GLIGOR_MESSAGE_H
00023 
00024 #include "util/serialization/simple_types.h"
00025 
00026 namespace wiselib
00027 {
00028 
00029    template<typename OsModel_P,
00030             typename Radio_P>
00031    class EschenaurGligorMessage
00032    {
00033    public:
00034       typedef OsModel_P OsModel;
00035       typedef Radio_P Radio;
00036       typedef uint16_t seq_nr_t;
00037       typedef typename Radio::node_id_t node_id_t;
00038       typedef typename Radio::block_data_t block_data_t;
00039       typedef typename Radio::size_t size_t;
00040       typedef typename Radio::message_id_t message_id_t;
00041       // --------------------------------------------------------------------
00042       inline EschenaurGligorMessage();
00043       // --------------------------------------------------------------------
00044       inline message_id_t msg_id()
00045       { return read<OsModel, block_data_t, message_id_t>( buffer ); };
00046       // --------------------------------------------------------------------
00047       inline void set_msg_id( message_id_t id )
00048       { write<OsModel, block_data_t, message_id_t>( buffer, id ); }
00049       // --------------------------------------------------------------------
00050       inline node_id_t node_id()
00051       { return read<OsModel, block_data_t, node_id_t>(buffer + NODE_ID_POS); }
00052       // --------------------------------------------------------------------
00053       inline void set_node_id( node_id_t id )
00054       { write<OsModel, block_data_t, node_id_t>(buffer + NODE_ID_POS, id); }
00055       // --------------------------------------------------------------------
00056       inline node_id_t dest_id()
00057       { return read<OsModel, block_data_t, node_id_t>(buffer + DEST_ID_POS); }
00058       // --------------------------------------------------------------------
00059       inline void set_dest_id( node_id_t id )
00060       { write<OsModel, block_data_t, node_id_t>(buffer + DEST_ID_POS, id); }
00061       // --------------------------------------------------------------------
00062       inline seq_nr_t seq_nr()
00063       { return read<OsModel, block_data_t, seq_nr_t>(buffer + SEQ_NR_POS); }
00064       // --------------------------------------------------------------------
00065       inline void set_seq_nr( seq_nr_t seq )
00066       { write<OsModel, block_data_t, seq_nr_t>(buffer + SEQ_NR_POS, seq); }
00067       // --------------------------------------------------------------------
00068       inline size_t payload_size()
00069       { return read<OsModel, block_data_t, size_t>(buffer + PAYLOAD_POS); }
00070       // --------------------------------------------------------------------
00071       inline block_data_t* payload()
00072       { return buffer + PAYLOAD_POS + sizeof(size_t); }
00073       // --------------------------------------------------------------------
00074       inline void set_payload( size_t len, block_data_t *buf )
00075       {
00076          write<OsModel, block_data_t, size_t>(buffer + PAYLOAD_POS, len);
00077          memcpy( buffer + PAYLOAD_POS + sizeof(size_t), buf, len);
00078       }
00079       // --------------------------------------------------------------------
00080       inline size_t buffer_size()
00081       { return PAYLOAD_POS + sizeof(size_t) + payload_size(); }
00082 
00083    private:
00084       enum data_positions
00085       {
00086          NODE_ID_POS = sizeof(message_id_t),
00087          DEST_ID_POS = NODE_ID_POS + sizeof(node_id_t),
00088          SEQ_NR_POS = DEST_ID_POS + sizeof(node_id_t),
00089          PAYLOAD_POS = SEQ_NR_POS + sizeof(seq_nr_t)
00090       };
00091 
00092       block_data_t buffer[Radio::MAX_MESSAGE_LENGTH];
00093    };
00094    // -----------------------------------------------------------------------
00095    template<typename OsModel_P,
00096             typename Radio_P>
00097    EschenaurGligorMessage<OsModel_P, Radio_P>::
00098    EschenaurGligorMessage()
00099    {
00100       set_msg_id( 0 );
00101       set_node_id( 0 );
00102       size_t len = 0;
00103       write<OsModel, block_data_t, size_t>(buffer + PAYLOAD_POS, len);
00104    }
00105 }
00106 #endif
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