Packets/MPEGDVBBundle/TLVPacket.hh

   1 // $Id: SNDUPacket.hh 423 2007-08-31 22:05:37Z g0dil $
   2 //
   3 // Copyright (C) 2007
   4 // Fraunhofer Institut fuer offene Kommunikationssysteme (FOKUS)
   5 // Kompetenzzentrum fuer Satelitenkommunikation (SatCom)
   6 //     Thorsten Horstmann <thorsten.horstmann@fokus.fraunhofer.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 SNDUPacket public header */
  25
  26 #ifndef HH_TLVPacket_
  27 #define HH_TLVPacket_ 1
  28
  29 // Custom includes
  30 #include <algorithm>
  31 #include "../../Packets/PacketType.hh"
  32 #include "../../Packets/ParseInt.hh"
  33 #include "../../Packets/PacketParser.hh"
  34
  35 //#include "TLVPacket.mpp"
  36 ///////////////////////////////hh.p////////////////////////////////////////
  37
  38 namespace senf {
  39
  40
  41     struct UnsuportedTLVPacketException : public std::exception
  42     {
  43         virtual char const * what() const throw() {
  44             return "length of length can be max. 4 bytes. Sorry.";
  45         }
  46     };
  47
  48     struct Parse_TLVPacketLength
  49         : public detail::packet::ParseIntOps<Parse_TLVPacketLength, boost::uint32_t>,
  50           public PacketParserBase
  51     {
  52 #       ifndef DOXYGEN
  53
  54         SENF_PACKET_PARSER_NO_INIT(Parse_TLVPacketLength);
  55
  56         typedef Parse_Flag      <    0 > Parse_extended_length_flag;
  57         typedef Parse_UIntField < 1, 8 > Parse_fixed_length;
  58
  59         SENF_PACKET_PARSER_DEFINE_FIXED_FIELDS(
  60             ((OverlayField)( extended_length_flag, Parse_extended_length_flag ))
  61             ((Field       )( fixed_length_field,   Parse_fixed_length         ))
  62         );
  63
  64 #       endif
  65
  66         typedef boost::uint32_t value_type;
  67
  68         value_type value() const {
  69             switch( bytes() ) {
  70                 case 1:
  71                     return fixed_length_field().value();
  72                 case 2:
  73                     return parse<Parse_UInt8>( 1 ).value();
  74                 case 3:
  75                     return parse<Parse_UInt16>( 1 ).value();
  76                 case 4:
  77                     return parse<Parse_UInt24>( 1 ).value();
  78                 case 5:
  79                     return parse<Parse_UInt32>( 1 ).value();
  80                 default:
  81                     throw(UnsuportedTLVPacketException());
  82             };
  83         }
  84
  85         size_type bytes() const {
  86             if ( extended_length_flag() )
  87                 return 1 + fixed_length_field();
  88             else
  89                 return 1;
  90         }
  91
  92         void init() const {
  93             defaultInit();
  94             extended_length_flag() = 0;
  95         }
  96
  97     };
  98
  99     /** \brief parse TLVPacket Packet
 100
 101         XXX
 102
 103         \see TLVPacketType
 104      */
 105     struct Parse_TLVPacket : public PacketParserBase
 106     {
 107 #       ifndef DOXYGEN
 108
 109         SENF_PACKET_PARSER_INIT(Parse_TLVPacket);
 110
 111         SENF_PACKET_PARSER_DEFINE_FIXED_FIELDS(
 112             ((Field)( type,   Parse_UInt32          ))
 113             ((Field)( length, Parse_TLVPacketLength ))
 114         );
 115
 116 #       endif
 117
 118 //        Parse_UInt32 type() const {
 119 //            return parse<Parse_UInt32>( 0 );
 120 //        }
 121
 122 //        Parse_TLVPacketLength length() const {
 123 //            return parse<Parse_TLVPacketLength>( 4 );
 124 //        }
 125
 126         PacketParserBase::size_type bytes() const;
 127
 128         static const size_type init_bytes = 4+1; // 4 bytes type + 1 byte length
 129
 130     };
 131
 132     /** \brief TLV Packet
 133
 134         \par Packet type (typedef):
 135             \ref TLVPacket
 136
 137         \par Fields:
 138             \ref Parse_TLVPacket
 139
 140         \ingroup protocolbundle_mpegdvb
 141      */
 142     struct TLVPacketType
 143         : public PacketTypeBase,
 144           public PacketTypeMixin<TLVPacketType>
 145     {
 146         typedef PacketTypeMixin<TLVPacketType> mixin;
 147         typedef ConcretePacket<TLVPacketType> packet;
 148         typedef Parse_TLVPacket parser;
 149
 150         using mixin::nextPacketRange;
 151         using mixin::init;
 152
 153
 154         static void dump(packet p, std::ostream & os);
 155
 156         static PacketParserBase::size_type initSize();
 157         static PacketParserBase::size_type initHeadSize();
 158     };
 159
 160     typedef TLVPacketType::packet TLVPacket;
 161
 162 }
 163
 164
 165 ///////////////////////////////hh.e////////////////////////////////////////
 166 //#include "TLVPacket.cci"
 167 //#include "TLVPacket.ct"
 168 //#include "TLVPacket.cti"
 169 #endif
 170
 171 \f
 172 // Local Variables:
 173 // mode: c++
 174 // fill-column: 100
 175 // c-file-style: "senf"
 176 // indent-tabs-mode: nil
 177 // ispell-local-dictionary: "american"
 178 // compile-command: "scons -u test"
 179 // comment-column: 40
 180 // End: