4 // Fraunhofer Institute for Open Communication Systems (FOKUS)
5 // Competence Center NETwork research (NET), St. Augustin, GERMANY
6 // Christian Niephaus <cni@berlios.de>
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.
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.
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.
24 \brief Radiotap header \n
25 <b>Radiotap uses least significant bit byte order</b>
28 #ifndef HH_SENF_Packets_80211Bundle_RadiotapPacket_
29 #define HH_SENF_Packets_80211Bundle_RadiotapPacket_ 1
31 #include "../../Packets/Packets.hh"
36 /** \brief Parse Flag field in Radiotap header
37 * <b>Re-ordering of bits due to LSB byte order</b>
38 * (see http://www.radiotap.org/)
41 struct RadiotapPacketParser_Flags : public senf::PacketParserBase
43 # include SENF_FIXED_PARSER()
45 SENF_PARSER_BITFIELD ( shortGI, 1, bool );
46 SENF_PARSER_BITFIELD ( badFCS, 1, bool );
47 SENF_PARSER_BITFIELD ( padding, 1, bool );
48 SENF_PARSER_BITFIELD ( fcsPresent, 1, bool );
49 SENF_PARSER_BITFIELD ( fragmentation, 1, bool );
50 SENF_PARSER_BITFIELD ( wep, 1, bool );
51 SENF_PARSER_BITFIELD ( shortPreamble, 1, bool );
52 SENF_PARSER_BITFIELD ( cfp, 1, bool );
54 SENF_PARSER_FINALIZE ( RadiotapPacketParser_Flags );
57 /** \brief Parse in Radiotap Header channel frequency and flag field
59 <b>Re-ordering of bits due to LSB byte order</b>
61 struct RadiotapPacketParser_ChannelOptions : public senf::PacketParserBase
63 # include SENF_FIXED_PARSER()
65 SENF_PARSER_FIELD ( freq, UInt16LSBParser );
67 SENF_PARSER_BITFIELD ( flag2ghz, 1, bool );
68 SENF_PARSER_BITFIELD ( ofdm, 1, bool );
69 SENF_PARSER_BITFIELD ( cck, 1, bool );
70 SENF_PARSER_BITFIELD ( turbo, 1, bool );
71 SENF_PARSER_SKIP_BITS ( 4 ); //currently unused in radiotap
72 SENF_PARSER_BITFIELD ( quarterRateChannel, 1, bool );
73 SENF_PARSER_BITFIELD ( halfRateChannel, 1, bool );
74 SENF_PARSER_BITFIELD ( gsm, 1, bool );
75 SENF_PARSER_BITFIELD ( staticTurbo, 1, bool );
76 SENF_PARSER_BITFIELD ( gfsk, 1, bool );
77 SENF_PARSER_BITFIELD ( cckOfdm, 1, bool );
78 SENF_PARSER_BITFIELD ( passive, 1, bool );
79 SENF_PARSER_BITFIELD ( flag5ghz, 1, bool );
81 SENF_PARSER_FINALIZE ( RadiotapPacketParser_ChannelOptions );
84 /** \brief Parse an Radiotap header
86 Parser implementing the Radiotap header
88 Radiotap requires that all fields in the radiotap header
89 are aligned to natural boundaries. For radiotap,
90 that means all 8-, 16-, 32-, and 64-bit fields
91 must begin on 8-, 16-, 32-, and 64-bit boundaries, respectively.
92 In this way, generators and parsers can avoid unaligned
93 accesses to radiotap capture fields. Radiotap-compliant
94 generators must insert padding before a capture field
95 to ensure its natural alignment.
97 \see <a href="http://www.radiotap.org">Radiotap.org</a>
99 \todo extended present field (bit 31 of present field is set)
101 struct RadiotapPacketParser : public senf::PacketParserBase
103 # include SENF_PARSER()
108 SENF_PARSER_FIELD ( version, UInt8Parser );
109 //padding bits, currently unused, it simply aligns the fields onto natural word boundaries.
110 SENF_PARSER_SKIP ( 1,1 );
111 SENF_PARSER_FIELD ( length, UInt16LSBParser );
115 * indicate which data field are contained in the packet
117 SENF_PARSER_BITFIELD_RO ( lockQualityPresent, 1, bool );
118 SENF_PARSER_BITFIELD_RO ( dbmAntennaNoisePresent, 1, bool );
119 SENF_PARSER_BITFIELD_RO ( dbmAntennaSignalPresent, 1, bool );
120 SENF_PARSER_BITFIELD_RO ( fhssPresent, 1, bool );
121 SENF_PARSER_BITFIELD_RO ( channelOptionsPresent, 1, bool );
122 SENF_PARSER_BITFIELD_RO ( ratePresent, 1, bool );
123 SENF_PARSER_BITFIELD_RO ( flagsPresent, 1, bool );
124 SENF_PARSER_BITFIELD_RO ( tsftPresent, 1, bool );
125 SENF_PARSER_SKIP_BITS ( 1 ); //currently unused bits
126 SENF_PARSER_BITFIELD_RO ( fcsPresent, 1, bool );
127 SENF_PARSER_BITFIELD_RO ( dbAntennaNoisePresent, 1, bool );
128 SENF_PARSER_BITFIELD_RO ( dbAntennaSignalPresent, 1, bool );
129 SENF_PARSER_BITFIELD_RO ( antennaPresent, 1, bool );
130 SENF_PARSER_BITFIELD_RO ( dbmTxAttenuationPresent, 1, bool );
131 SENF_PARSER_BITFIELD_RO ( dbTxAttenuationPresent, 1, bool );
132 SENF_PARSER_BITFIELD_RO ( txAttenuationPresent, 1, bool );
133 SENF_PARSER_SKIP_BITS ( 8 ); //currently unused bits
134 //if bit is set,another 32 bit present flag is attached (not implemented yet)
135 SENF_PARSER_BITFIELD ( extendedBitmaskPresent, 1, bool );
136 SENF_PARSER_SKIP_BITS ( 7 ); //currently unused bits
140 * parsing data according to present flags
142 * PARSER_SKIP required to skip correct length of padding bits
145 /* macro to create required variant parser */
146 #define OPTIONAL_FIELD(name, parser) SENF_PARSER_VARIANT \
147 ( name##_, name##Present, \
148 ( novalue( disable_##name, VoidPacketParser )) \
149 ( id( name, parser )) );
152 #define SKIP_OPTIONAL_PADDING(cond, parser, size) \
154 (cond ? (size - (parser##__offset() + \
155 senf::bytes(parser##_())) % size) % size : 0) , 0 );
157 OPTIONAL_FIELD ( tsft, UInt64LSBParser );
158 OPTIONAL_FIELD ( flags, RadiotapPacketParser_Flags );
159 OPTIONAL_FIELD ( rate, UInt8Parser );
160 SKIP_OPTIONAL_PADDING(channelOptionsPresent(), rate, 2);
161 OPTIONAL_FIELD ( channelOptions, RadiotapPacketParser_ChannelOptions ) ;
162 SKIP_OPTIONAL_PADDING(fhssPresent(), channelOptions, 2);
163 OPTIONAL_FIELD ( fhss, UInt16LSBParser );
164 OPTIONAL_FIELD ( dbmAntennaSignal, Int8Parser );
165 OPTIONAL_FIELD ( dbmAntennaNoise, Int8Parser );
166 SKIP_OPTIONAL_PADDING(lockQualityPresent(), dbmAntennaNoise, 2);
167 OPTIONAL_FIELD ( lockQuality, UInt16LSBParser );
168 SKIP_OPTIONAL_PADDING(txAttenuationPresent(), lockQuality, 2);
169 OPTIONAL_FIELD ( txAttenuation, UInt16LSBParser );
170 SKIP_OPTIONAL_PADDING(dbTxAttenuationPresent(), txAttenuation, 2);
171 OPTIONAL_FIELD ( dbTxAttenuation, UInt16LSBParser );
172 OPTIONAL_FIELD ( dbmTxAttenuation, Int8Parser );
173 OPTIONAL_FIELD ( antenna, UInt8Parser );
174 OPTIONAL_FIELD ( dbAntennaSignal, UInt8Parser );
175 OPTIONAL_FIELD ( dbAntennaNoise, UInt8Parser );
176 SKIP_OPTIONAL_PADDING(fcsPresent(), dbAntennaNoise, 4)
177 OPTIONAL_FIELD ( fcs, UInt32Parser );
183 SENF_PARSER_FINALIZE(RadiotapPacketParser);
186 /** \brief Radiotap packet
188 \par Packet type (typedef):
192 \ref RadiotapPacketParser
194 \ingroup protocolbundle_80211
196 struct RadiotapPacketType
197 : public senf::PacketTypeBase,
198 public senf::PacketTypeMixin<RadiotapPacketType>
200 typedef senf::PacketTypeMixin<RadiotapPacketType> mixin;
201 typedef senf::ConcretePacket<RadiotapPacketType> packet;
202 typedef senf::RadiotapPacketParser parser;
204 using mixin::nextPacketRange;
206 using mixin::initSize;
208 static void dump(packet p, std::ostream &os);
209 static void finalize(packet p);
210 static factory_t nextPacketType(packet p);
214 typedef senf::ConcretePacket<RadiotapPacketType> RadiotapPacket;