Roman Khassraf | 5bd14f2 | 2015-06-24 17:59:13 +0200 | [diff] [blame] | 1 | /* -*- c++ -*- */ |
| 2 | /* |
| 3 | * @file |
| 4 | * @author Roman Khassraf <rkhassraf@gmail.com> |
| 5 | * @section LICENSE |
| 6 | * |
| 7 | * Gr-gsm is free software; you can redistribute it and/or modify |
| 8 | * it under the terms of the GNU General Public License as published by |
| 9 | * the Free Software Foundation; either version 3, or (at your option) |
| 10 | * any later version. |
| 11 | * |
| 12 | * Gr-gsm is distributed in the hope that it will be useful, |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | * GNU General Public License for more details. |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License |
| 18 | * along with gr-gsm; see the file COPYING. If not, write to |
| 19 | * the Free Software Foundation, Inc., 51 Franklin Street, |
| 20 | * Boston, MA 02110-1301, USA. |
| 21 | */ |
| 22 | |
| 23 | #ifdef HAVE_CONFIG_H |
| 24 | #include "config.h" |
| 25 | #endif |
| 26 | |
| 27 | #include <gnuradio/io_signature.h> |
| 28 | #include <grgsm/gsmtap.h> |
| 29 | #include <unistd.h> |
| 30 | #include <set> |
Roman Khassraf | 95c6f9d | 2015-07-12 19:02:32 +0200 | [diff] [blame^] | 31 | #include <map> |
Roman Khassraf | 5bd14f2 | 2015-06-24 17:59:13 +0200 | [diff] [blame] | 32 | #include <iterator> |
| 33 | #include <algorithm> |
| 34 | #include <iostream> |
Roman Khassraf | 95c6f9d | 2015-07-12 19:02:32 +0200 | [diff] [blame^] | 35 | #include <endian.h> |
| 36 | #include <boost/foreach.hpp> |
Roman Khassraf | 5bd14f2 | 2015-06-24 17:59:13 +0200 | [diff] [blame] | 37 | |
| 38 | #include "extract_immediate_assignment_impl.h" |
| 39 | |
| 40 | namespace gr { |
| 41 | namespace gsm { |
| 42 | boost::mutex extract_immediate_assignment_mutex; |
| 43 | |
| 44 | void extract_immediate_assignment_impl::process_message(pmt::pmt_t msg){ |
| 45 | pmt::pmt_t message_plus_header_blob = pmt::cdr(msg); |
| 46 | uint8_t * message_plus_header = (uint8_t *)pmt::blob_data(message_plus_header_blob); |
| 47 | gsmtap_hdr * header = (gsmtap_hdr *)message_plus_header; |
| 48 | uint8_t * msg_elements = (uint8_t *)(message_plus_header+sizeof(gsmtap_hdr)); |
| 49 | uint32_t frame_nr = be32toh(header->frame_number); |
| 50 | |
| 51 | if(msg_elements[2]==0x3f) |
| 52 | { |
Roman Khassraf | 95c6f9d | 2015-07-12 19:02:32 +0200 | [diff] [blame^] | 53 | immediate_assignment current; |
Roman Khassraf | 5bd14f2 | 2015-06-24 17:59:13 +0200 | [diff] [blame] | 54 | std::cout << "\n------------------------------------------------------------------\n" << std::endl; |
Roman Khassraf | 5bd14f2 | 2015-06-24 17:59:13 +0200 | [diff] [blame] | 55 | std::cout << "FrameNr: " << (unsigned)frame_nr << std::endl; |
| 56 | |
Roman Khassraf | 95c6f9d | 2015-07-12 19:02:32 +0200 | [diff] [blame^] | 57 | current.frame_nr = frame_nr; |
| 58 | |
Roman Khassraf | 5bd14f2 | 2015-06-24 17:59:13 +0200 | [diff] [blame] | 59 | uint8_t mode = msg_elements[3] & (1 << 4); |
| 60 | |
| 61 | /* |
| 62 | channel description, see table 10.23 in GSM 04.08 |
| 63 | |
| 64 | msg_elements[4], octet 2 in specs |
| 65 | |
| 66 | 5 bits channel type |
| 67 | ignored in TBF |
| 68 | 00001 TCH/F |
| 69 | 0001T TCH/H, subchannel/TDMA offset T |
| 70 | 001TT SDCCH/4, subchannel/TDMA offset TT |
| 71 | 01TTT SDCCH/8, subchannel/TDMA offset TTT |
| 72 | 3 bits timeslot number TN |
| 73 | */ |
| 74 | uint8_t channeltype = (msg_elements[4] >> 3); |
| 75 | uint8_t timeslot = (msg_elements[4] & 7); |
| 76 | uint8_t subchannel; |
| 77 | std::string channel_type; |
| 78 | |
| 79 | std::cout << "Timeslot: " << (unsigned)timeslot << std::endl; |
| 80 | |
| 81 | if (mode == 0) |
| 82 | { |
| 83 | if (channeltype >= 8) |
| 84 | { |
| 85 | channel_type = "SDCCH/8"; |
| 86 | subchannel = (channeltype & 7); |
| 87 | } |
| 88 | else if (channeltype >= 4 && channeltype <= 7) |
| 89 | { |
| 90 | channel_type = "SDCCH/4"; |
| 91 | subchannel = (channeltype & 3); |
| 92 | } |
| 93 | else if (channeltype >= 2 && channeltype <= 3) |
| 94 | { |
| 95 | channel_type = "TCH/H"; |
| 96 | subchannel = (channeltype & 1); |
| 97 | } |
| 98 | else |
| 99 | { |
| 100 | channel_type = "TCH/F"; |
| 101 | subchannel = 0; |
| 102 | } |
| 103 | |
| 104 | std::cout << "Channel type: " << channel_type << std::endl; |
| 105 | std::cout << "Subchannel: " << (unsigned)subchannel << std::endl; |
| 106 | } |
| 107 | else |
| 108 | { |
Roman Khassraf | 95c6f9d | 2015-07-12 19:02:32 +0200 | [diff] [blame^] | 109 | channel_type = "GPRS - Temporary Block Flow TBF"; |
| 110 | subchannel = 0; |
Roman Khassraf | 5bd14f2 | 2015-06-24 17:59:13 +0200 | [diff] [blame] | 111 | std::cout << "Channel type: " << "GPRS - Temporary Block Flow TBF" << std::endl; |
| 112 | } |
| 113 | |
Roman Khassraf | 95c6f9d | 2015-07-12 19:02:32 +0200 | [diff] [blame^] | 114 | current.channel_type = channel_type; |
| 115 | current.timeslot = timeslot; |
| 116 | current.subchannel = subchannel; |
| 117 | |
Roman Khassraf | 5bd14f2 | 2015-06-24 17:59:13 +0200 | [diff] [blame] | 118 | /* |
| 119 | msg_elements[5], msg_elements[6] are octets 3 and 4 in specs |
| 120 | |
| 121 | 3 bits training sequence (we dont process this for the moment) |
| 122 | 1 bit hopping channel H |
| 123 | |
| 124 | if H = 0: |
| 125 | 2 bit spare |
| 126 | 2 bit high part of single channel arfcn |
| 127 | |
| 128 | 8 bit low part of single channel arfcn |
| 129 | |
| 130 | if H = 1: |
| 131 | 4 bit high part of MAIO |
| 132 | |
| 133 | 2 bit low part of MAIO |
| 134 | 6bit HSN |
| 135 | */ |
| 136 | uint8_t hopping = (msg_elements[5] >> 4) & 1; |
Roman Khassraf | 95c6f9d | 2015-07-12 19:02:32 +0200 | [diff] [blame^] | 137 | current.hopping = hopping; |
Roman Khassraf | 5bd14f2 | 2015-06-24 17:59:13 +0200 | [diff] [blame] | 138 | |
| 139 | std::cout << "Hopping: " << (unsigned)hopping << std::endl; |
| 140 | |
| 141 | if (hopping) |
| 142 | { |
| 143 | uint8_t maio = (msg_elements[5] & 0xf) << 2; |
| 144 | maio |= (msg_elements[6] >> 6); |
| 145 | |
| 146 | uint8_t hsn = (msg_elements[6] & 0x3f); |
| 147 | |
Roman Khassraf | 95c6f9d | 2015-07-12 19:02:32 +0200 | [diff] [blame^] | 148 | current.maio = maio; |
| 149 | current.hsn = hsn; |
| 150 | |
Roman Khassraf | 5bd14f2 | 2015-06-24 17:59:13 +0200 | [diff] [blame] | 151 | std::cout << "MAIO: " << (unsigned)maio << std::endl; |
| 152 | std::cout << "HSN: " << (unsigned)hsn << std::endl; |
| 153 | } |
| 154 | else |
| 155 | { |
| 156 | uint16_t arfcn = (msg_elements[5] & 3) << 8; |
| 157 | arfcn |= msg_elements[6]; |
| 158 | |
Roman Khassraf | 95c6f9d | 2015-07-12 19:02:32 +0200 | [diff] [blame^] | 159 | current.arfcn = arfcn; |
| 160 | |
Roman Khassraf | 5bd14f2 | 2015-06-24 17:59:13 +0200 | [diff] [blame] | 161 | std::cout << "ARFCN: " << (unsigned)arfcn << std::endl; |
| 162 | } |
| 163 | |
| 164 | // request reference as ID in set, so we get only one immediate assignment per reference |
| 165 | /* |
| 166 | msg_elements[7 - 9], octets 5 - 7 in specs : request reference, maybe later |
| 167 | |
| 168 | msg_elements[10]: timing advance |
| 169 | */ |
| 170 | uint8_t timing_advance = msg_elements[10]; |
| 171 | std::cout << "TA: " << (unsigned)timing_advance << std::endl; |
| 172 | |
Roman Khassraf | 95c6f9d | 2015-07-12 19:02:32 +0200 | [diff] [blame^] | 173 | current.timing_advance = timing_advance; |
| 174 | |
| 175 | |
Roman Khassraf | 5bd14f2 | 2015-06-24 17:59:13 +0200 | [diff] [blame] | 176 | /* |
| 177 | msg_elements[11] - 20: mobile allocation, flexible length, see 10.5.2.21 |
| 178 | */ |
Roman Khassraf | 5bd14f2 | 2015-06-24 17:59:13 +0200 | [diff] [blame] | 179 | uint8_t mobile_allocation_len = msg_elements[11]; |
| 180 | if (mobile_allocation_len > 0) |
| 181 | { |
| 182 | uint8_t mobile_allocation[mobile_allocation_len]; |
Roman Khassraf | 95c6f9d | 2015-07-12 19:02:32 +0200 | [diff] [blame^] | 183 | std::string ma; |
| 184 | |
Roman Khassraf | 5bd14f2 | 2015-06-24 17:59:13 +0200 | [diff] [blame] | 185 | for (int i=0; i<mobile_allocation_len; i++) |
| 186 | { |
| 187 | mobile_allocation[i] = msg_elements[12 + i]; |
Roman Khassraf | 95c6f9d | 2015-07-12 19:02:32 +0200 | [diff] [blame^] | 188 | |
| 189 | for (int j=0; j<8; j++) |
| 190 | { |
| 191 | ma.push_back('0' + ((mobile_allocation[i] >> (7-j)) & 0x1)); |
| 192 | } |
| 193 | |
| 194 | // std::cout << "MA: " << (unsigned)mobile_allocation[i] << std::endl; |
| 195 | std::cout << "MA: " << ma << std::endl; |
Roman Khassraf | 5bd14f2 | 2015-06-24 17:59:13 +0200 | [diff] [blame] | 196 | } |
Roman Khassraf | 95c6f9d | 2015-07-12 19:02:32 +0200 | [diff] [blame^] | 197 | |
| 198 | current.mobile_allocation = ma; |
Roman Khassraf | 5bd14f2 | 2015-06-24 17:59:13 +0200 | [diff] [blame] | 199 | } |
Roman Khassraf | 95c6f9d | 2015-07-12 19:02:32 +0200 | [diff] [blame^] | 200 | |
| 201 | d_assignment_map[current.frame_nr] = current; |
Roman Khassraf | 5bd14f2 | 2015-06-24 17:59:13 +0200 | [diff] [blame] | 202 | } |
| 203 | } |
| 204 | |
Roman Khassraf | 95c6f9d | 2015-07-12 19:02:32 +0200 | [diff] [blame^] | 205 | std::vector<int> extract_immediate_assignment_impl::get_frame_numbers() |
| 206 | { |
| 207 | std::vector<int> fnrs; |
| 208 | BOOST_FOREACH(immediate_assignment_map::value_type &i, d_assignment_map) |
| 209 | { |
| 210 | fnrs.push_back(i.second.frame_nr); |
| 211 | } |
| 212 | return fnrs; |
| 213 | } |
| 214 | |
| 215 | std::vector<std::string> extract_immediate_assignment_impl::get_channel_types() |
| 216 | { |
| 217 | std::vector<std::string> types; |
| 218 | BOOST_FOREACH(immediate_assignment_map::value_type &i, d_assignment_map) |
| 219 | { |
| 220 | types.push_back(i.second.channel_type); |
| 221 | } |
| 222 | return types; |
| 223 | } |
| 224 | |
| 225 | std::vector<int> extract_immediate_assignment_impl::get_timeslots() |
| 226 | { |
| 227 | std::vector<int> timeslots; |
| 228 | BOOST_FOREACH(immediate_assignment_map::value_type &i, d_assignment_map) |
| 229 | { |
| 230 | timeslots.push_back(i.second.timeslot); |
| 231 | } |
| 232 | return timeslots; |
| 233 | } |
| 234 | |
| 235 | std::vector<int> extract_immediate_assignment_impl::get_subchannels() |
| 236 | { |
| 237 | std::vector<int> subchannels; |
| 238 | BOOST_FOREACH(immediate_assignment_map::value_type &i, d_assignment_map) |
| 239 | { |
| 240 | subchannels.push_back(i.second.subchannel); |
| 241 | } |
| 242 | return subchannels; |
| 243 | } |
| 244 | |
| 245 | std::vector<int> extract_immediate_assignment_impl::get_hopping() |
| 246 | { |
| 247 | std::vector<int> hopping; |
| 248 | BOOST_FOREACH(immediate_assignment_map::value_type &i, d_assignment_map) |
| 249 | { |
| 250 | hopping.push_back(i.second.hopping); |
| 251 | } |
| 252 | return hopping; |
| 253 | } |
| 254 | |
| 255 | std::vector<int> extract_immediate_assignment_impl::get_maios() |
| 256 | { |
| 257 | std::vector<int> maios; |
| 258 | BOOST_FOREACH(immediate_assignment_map::value_type &i, d_assignment_map) |
| 259 | { |
| 260 | maios.push_back(i.second.maio); |
| 261 | } |
| 262 | return maios; |
| 263 | } |
| 264 | |
| 265 | std::vector<int> extract_immediate_assignment_impl::get_hsns() |
| 266 | { |
| 267 | std::vector<int> hsns; |
| 268 | BOOST_FOREACH(immediate_assignment_map::value_type &i, d_assignment_map) |
| 269 | { |
| 270 | hsns.push_back(i.second.hsn); |
| 271 | } |
| 272 | return hsns; |
| 273 | } |
| 274 | |
| 275 | std::vector<int> extract_immediate_assignment_impl::get_arfcns() |
| 276 | { |
| 277 | std::vector<int> arfcns; |
| 278 | BOOST_FOREACH(immediate_assignment_map::value_type &i, d_assignment_map) |
| 279 | { |
| 280 | arfcns.push_back(i.second.arfcn); |
| 281 | } |
| 282 | return arfcns; |
| 283 | } |
| 284 | |
| 285 | std::vector<int> extract_immediate_assignment_impl::get_timing_advances() |
| 286 | { |
| 287 | std::vector<int> tas; |
| 288 | BOOST_FOREACH(immediate_assignment_map::value_type &i, d_assignment_map) |
| 289 | { |
| 290 | tas.push_back(i.second.timing_advance); |
| 291 | } |
| 292 | return tas; |
| 293 | } |
| 294 | |
| 295 | std::vector<std::string> extract_immediate_assignment_impl::get_mobile_allocations() |
| 296 | { |
| 297 | std::vector<std::string> mobile_allocations; |
| 298 | BOOST_FOREACH(immediate_assignment_map::value_type &i, d_assignment_map) |
| 299 | { |
| 300 | mobile_allocations.push_back(i.second.mobile_allocation); |
| 301 | } |
| 302 | return mobile_allocations; |
| 303 | } |
| 304 | |
Roman Khassraf | 5bd14f2 | 2015-06-24 17:59:13 +0200 | [diff] [blame] | 305 | extract_immediate_assignment::sptr |
| 306 | extract_immediate_assignment::make() |
| 307 | { |
| 308 | return gnuradio::get_initial_sptr |
| 309 | (new extract_immediate_assignment_impl()); |
| 310 | } |
| 311 | |
| 312 | /* |
| 313 | * The private constructor |
| 314 | */ |
| 315 | extract_immediate_assignment_impl::extract_immediate_assignment_impl() |
| 316 | : gr::block("extract_immediate_assignment", |
| 317 | gr::io_signature::make(0, 0, 0), |
| 318 | gr::io_signature::make(0, 0, 0)) |
| 319 | { |
| 320 | message_port_register_in(pmt::mp("msgs")); |
| 321 | set_msg_handler(pmt::mp("msgs"), boost::bind(&extract_immediate_assignment_impl::process_message, this, _1)); |
| 322 | } |
| 323 | |
| 324 | /* |
| 325 | * Our virtual destructor. |
| 326 | */ |
| 327 | extract_immediate_assignment_impl::~extract_immediate_assignment_impl() |
| 328 | { |
| 329 | } |
| 330 | } /* namespace gsm */ |
| 331 | } /* namespace gr */ |
| 332 | |