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> |
Roman Khassraf | 95c6f9d | 2015-07-12 19:02:32 +0200 | [diff] [blame] | 30 | #include <map> |
Roman Khassraf | 95c6f9d | 2015-07-12 19:02:32 +0200 | [diff] [blame] | 31 | #include <endian.h> |
| 32 | #include <boost/foreach.hpp> |
Roman Khassraf | 5bd14f2 | 2015-06-24 17:59:13 +0200 | [diff] [blame] | 33 | |
| 34 | #include "extract_immediate_assignment_impl.h" |
| 35 | |
| 36 | namespace gr { |
| 37 | namespace gsm { |
| 38 | boost::mutex extract_immediate_assignment_mutex; |
| 39 | |
| 40 | void extract_immediate_assignment_impl::process_message(pmt::pmt_t msg){ |
| 41 | pmt::pmt_t message_plus_header_blob = pmt::cdr(msg); |
| 42 | uint8_t * message_plus_header = (uint8_t *)pmt::blob_data(message_plus_header_blob); |
| 43 | gsmtap_hdr * header = (gsmtap_hdr *)message_plus_header; |
| 44 | uint8_t * msg_elements = (uint8_t *)(message_plus_header+sizeof(gsmtap_hdr)); |
| 45 | uint32_t frame_nr = be32toh(header->frame_number); |
| 46 | |
| 47 | if(msg_elements[2]==0x3f) |
| 48 | { |
Roman Khassraf | 95c6f9d | 2015-07-12 19:02:32 +0200 | [diff] [blame] | 49 | immediate_assignment current; |
Roman Khassraf | 95c6f9d | 2015-07-12 19:02:32 +0200 | [diff] [blame] | 50 | current.frame_nr = frame_nr; |
| 51 | |
Roman Khassraf | 5bd14f2 | 2015-06-24 17:59:13 +0200 | [diff] [blame] | 52 | /* |
| 53 | channel description, see table 10.23 in GSM 04.08 |
| 54 | |
| 55 | msg_elements[4], octet 2 in specs |
| 56 | |
| 57 | 5 bits channel type |
| 58 | ignored in TBF |
| 59 | 00001 TCH/F |
| 60 | 0001T TCH/H, subchannel/TDMA offset T |
| 61 | 001TT SDCCH/4, subchannel/TDMA offset TT |
| 62 | 01TTT SDCCH/8, subchannel/TDMA offset TTT |
| 63 | 3 bits timeslot number TN |
| 64 | */ |
Roman Khassraf | a212ca2 | 2015-07-12 21:19:35 +0200 | [diff] [blame] | 65 | current.timeslot = (msg_elements[4] & 7); |
| 66 | |
Roman Khassraf | 5bd14f2 | 2015-06-24 17:59:13 +0200 | [diff] [blame] | 67 | uint8_t channeltype = (msg_elements[4] >> 3); |
Roman Khassraf | a212ca2 | 2015-07-12 21:19:35 +0200 | [diff] [blame] | 68 | uint8_t mode = msg_elements[3] & (1 << 4); |
Roman Khassraf | 5bd14f2 | 2015-06-24 17:59:13 +0200 | [diff] [blame] | 69 | if (mode == 0) |
| 70 | { |
| 71 | if (channeltype >= 8) |
| 72 | { |
Roman Khassraf | a212ca2 | 2015-07-12 21:19:35 +0200 | [diff] [blame] | 73 | current.channel_type = "SDCCH/8"; |
| 74 | current.subchannel = (channeltype & 7); |
Roman Khassraf | 5bd14f2 | 2015-06-24 17:59:13 +0200 | [diff] [blame] | 75 | } |
| 76 | else if (channeltype >= 4 && channeltype <= 7) |
| 77 | { |
Roman Khassraf | a212ca2 | 2015-07-12 21:19:35 +0200 | [diff] [blame] | 78 | current.channel_type = "SDCCH/4"; |
| 79 | current.subchannel = (channeltype & 3); |
Roman Khassraf | 5bd14f2 | 2015-06-24 17:59:13 +0200 | [diff] [blame] | 80 | } |
| 81 | else if (channeltype >= 2 && channeltype <= 3) |
| 82 | { |
Roman Khassraf | a212ca2 | 2015-07-12 21:19:35 +0200 | [diff] [blame] | 83 | current.channel_type = "TCH/H"; |
| 84 | current.subchannel = (channeltype & 1); |
Roman Khassraf | 5bd14f2 | 2015-06-24 17:59:13 +0200 | [diff] [blame] | 85 | } |
| 86 | else |
| 87 | { |
Roman Khassraf | a212ca2 | 2015-07-12 21:19:35 +0200 | [diff] [blame] | 88 | current.channel_type = "TCH/F"; |
Roman Khassraf | 5bd14f2 | 2015-06-24 17:59:13 +0200 | [diff] [blame] | 89 | } |
Roman Khassraf | 5bd14f2 | 2015-06-24 17:59:13 +0200 | [diff] [blame] | 90 | } |
| 91 | else |
| 92 | { |
Roman Khassraf | 2b5ca48 | 2015-07-13 10:28:17 +0200 | [diff] [blame^] | 93 | // We return if ignore_gprs is set true |
| 94 | if (d_ignore_gprs) |
| 95 | { |
| 96 | return; |
| 97 | } |
Roman Khassraf | a212ca2 | 2015-07-12 21:19:35 +0200 | [diff] [blame] | 98 | current.channel_type = "GPRS - Temporary Block Flow TBF"; |
Roman Khassraf | 5bd14f2 | 2015-06-24 17:59:13 +0200 | [diff] [blame] | 99 | } |
| 100 | |
| 101 | /* |
| 102 | msg_elements[5], msg_elements[6] are octets 3 and 4 in specs |
| 103 | |
| 104 | 3 bits training sequence (we dont process this for the moment) |
| 105 | 1 bit hopping channel H |
| 106 | |
| 107 | if H = 0: |
| 108 | 2 bit spare |
| 109 | 2 bit high part of single channel arfcn |
| 110 | |
| 111 | 8 bit low part of single channel arfcn |
| 112 | |
| 113 | if H = 1: |
| 114 | 4 bit high part of MAIO |
| 115 | |
| 116 | 2 bit low part of MAIO |
| 117 | 6bit HSN |
| 118 | */ |
Roman Khassraf | a212ca2 | 2015-07-12 21:19:35 +0200 | [diff] [blame] | 119 | current.hopping = (msg_elements[5] >> 4) & 1; |
| 120 | if (current.hopping) |
Roman Khassraf | 5bd14f2 | 2015-06-24 17:59:13 +0200 | [diff] [blame] | 121 | { |
| 122 | uint8_t maio = (msg_elements[5] & 0xf) << 2; |
| 123 | maio |= (msg_elements[6] >> 6); |
Roman Khassraf | 95c6f9d | 2015-07-12 19:02:32 +0200 | [diff] [blame] | 124 | current.maio = maio; |
Roman Khassraf | a212ca2 | 2015-07-12 21:19:35 +0200 | [diff] [blame] | 125 | current.hsn = (msg_elements[6] & 0x3f); |
Roman Khassraf | 5bd14f2 | 2015-06-24 17:59:13 +0200 | [diff] [blame] | 126 | } |
| 127 | else |
| 128 | { |
| 129 | uint16_t arfcn = (msg_elements[5] & 3) << 8; |
| 130 | arfcn |= msg_elements[6]; |
Roman Khassraf | 95c6f9d | 2015-07-12 19:02:32 +0200 | [diff] [blame] | 131 | current.arfcn = arfcn; |
Roman Khassraf | 5bd14f2 | 2015-06-24 17:59:13 +0200 | [diff] [blame] | 132 | } |
| 133 | |
Roman Khassraf | a212ca2 | 2015-07-12 21:19:35 +0200 | [diff] [blame] | 134 | // TODO: add option where request reference is set as ID, |
| 135 | // so we get only one immediate assignment per reference |
Roman Khassraf | 5bd14f2 | 2015-06-24 17:59:13 +0200 | [diff] [blame] | 136 | /* |
| 137 | msg_elements[7 - 9], octets 5 - 7 in specs : request reference, maybe later |
| 138 | |
| 139 | msg_elements[10]: timing advance |
| 140 | */ |
Roman Khassraf | a212ca2 | 2015-07-12 21:19:35 +0200 | [diff] [blame] | 141 | current.timing_advance = msg_elements[10]; |
Roman Khassraf | 95c6f9d | 2015-07-12 19:02:32 +0200 | [diff] [blame] | 142 | |
Roman Khassraf | 5bd14f2 | 2015-06-24 17:59:13 +0200 | [diff] [blame] | 143 | /* |
Roman Khassraf | a212ca2 | 2015-07-12 21:19:35 +0200 | [diff] [blame] | 144 | msg_elements[11 - 20]: mobile allocation, flexible length, see 10.5.2.21 |
Roman Khassraf | 5bd14f2 | 2015-06-24 17:59:13 +0200 | [diff] [blame] | 145 | */ |
Roman Khassraf | 5bd14f2 | 2015-06-24 17:59:13 +0200 | [diff] [blame] | 146 | uint8_t mobile_allocation_len = msg_elements[11]; |
| 147 | if (mobile_allocation_len > 0) |
| 148 | { |
Roman Khassraf | 95c6f9d | 2015-07-12 19:02:32 +0200 | [diff] [blame] | 149 | std::string ma; |
Roman Khassraf | 5bd14f2 | 2015-06-24 17:59:13 +0200 | [diff] [blame] | 150 | for (int i=0; i<mobile_allocation_len; i++) |
| 151 | { |
Roman Khassraf | 95c6f9d | 2015-07-12 19:02:32 +0200 | [diff] [blame] | 152 | for (int j=0; j<8; j++) |
| 153 | { |
Roman Khassraf | a212ca2 | 2015-07-12 21:19:35 +0200 | [diff] [blame] | 154 | ma.push_back('0' + ((msg_elements[12 + i] >> (7-j)) & 0x1)); |
Roman Khassraf | 95c6f9d | 2015-07-12 19:02:32 +0200 | [diff] [blame] | 155 | } |
Roman Khassraf | 5bd14f2 | 2015-06-24 17:59:13 +0200 | [diff] [blame] | 156 | } |
Roman Khassraf | 95c6f9d | 2015-07-12 19:02:32 +0200 | [diff] [blame] | 157 | current.mobile_allocation = ma; |
Roman Khassraf | 5bd14f2 | 2015-06-24 17:59:13 +0200 | [diff] [blame] | 158 | } |
Roman Khassraf | 95c6f9d | 2015-07-12 19:02:32 +0200 | [diff] [blame] | 159 | |
| 160 | d_assignment_map[current.frame_nr] = current; |
Roman Khassraf | a212ca2 | 2015-07-12 21:19:35 +0200 | [diff] [blame] | 161 | |
| 162 | if (d_print_immediate_assignments) |
| 163 | { |
| 164 | std::cout << "\n------------------------------------------------\n" << std::endl; |
| 165 | std::cout << "FrameNr: " << (unsigned)current.frame_nr << std::endl; |
| 166 | std::cout << "Channel type: " << current.channel_type << std::endl; |
| 167 | std::cout << "Timeslot: " << (unsigned)current.timeslot << std::endl; |
| 168 | // Dont print subchannel if mode == 1 or if the assigned channel is TCH/F |
| 169 | if (mode == 0 && channeltype >= 2) |
| 170 | { |
| 171 | std::cout << "Subchannel: " << (unsigned)current.subchannel << std::endl; |
| 172 | } |
| 173 | std::cout << "Hopping: " << (unsigned)current.hopping << std::endl; |
| 174 | if (current.hopping) |
| 175 | { |
| 176 | std::cout << "MAIO: " << (unsigned)current.maio << std::endl; |
| 177 | std::cout << "HSN: " << (unsigned)current.hsn << std::endl; |
| 178 | std::cout << "Mobile Allocation: " << current.mobile_allocation << std::endl; |
| 179 | } |
| 180 | else |
| 181 | { |
| 182 | std::cout << "ARFCN: " << (unsigned)current.arfcn << std::endl; |
| 183 | } |
| 184 | std::cout << "Timing Advance: " << (unsigned)current.timing_advance << std::endl; |
| 185 | } |
Roman Khassraf | 5bd14f2 | 2015-06-24 17:59:13 +0200 | [diff] [blame] | 186 | } |
| 187 | } |
| 188 | |
Roman Khassraf | 95c6f9d | 2015-07-12 19:02:32 +0200 | [diff] [blame] | 189 | std::vector<int> extract_immediate_assignment_impl::get_frame_numbers() |
| 190 | { |
| 191 | std::vector<int> fnrs; |
| 192 | BOOST_FOREACH(immediate_assignment_map::value_type &i, d_assignment_map) |
| 193 | { |
| 194 | fnrs.push_back(i.second.frame_nr); |
| 195 | } |
| 196 | return fnrs; |
| 197 | } |
| 198 | |
| 199 | std::vector<std::string> extract_immediate_assignment_impl::get_channel_types() |
| 200 | { |
| 201 | std::vector<std::string> types; |
| 202 | BOOST_FOREACH(immediate_assignment_map::value_type &i, d_assignment_map) |
| 203 | { |
| 204 | types.push_back(i.second.channel_type); |
| 205 | } |
| 206 | return types; |
| 207 | } |
| 208 | |
| 209 | std::vector<int> extract_immediate_assignment_impl::get_timeslots() |
| 210 | { |
| 211 | std::vector<int> timeslots; |
| 212 | BOOST_FOREACH(immediate_assignment_map::value_type &i, d_assignment_map) |
| 213 | { |
| 214 | timeslots.push_back(i.second.timeslot); |
| 215 | } |
| 216 | return timeslots; |
| 217 | } |
| 218 | |
| 219 | std::vector<int> extract_immediate_assignment_impl::get_subchannels() |
| 220 | { |
| 221 | std::vector<int> subchannels; |
| 222 | BOOST_FOREACH(immediate_assignment_map::value_type &i, d_assignment_map) |
| 223 | { |
| 224 | subchannels.push_back(i.second.subchannel); |
| 225 | } |
| 226 | return subchannels; |
| 227 | } |
| 228 | |
| 229 | std::vector<int> extract_immediate_assignment_impl::get_hopping() |
| 230 | { |
| 231 | std::vector<int> hopping; |
| 232 | BOOST_FOREACH(immediate_assignment_map::value_type &i, d_assignment_map) |
| 233 | { |
| 234 | hopping.push_back(i.second.hopping); |
| 235 | } |
| 236 | return hopping; |
| 237 | } |
| 238 | |
| 239 | std::vector<int> extract_immediate_assignment_impl::get_maios() |
| 240 | { |
| 241 | std::vector<int> maios; |
| 242 | BOOST_FOREACH(immediate_assignment_map::value_type &i, d_assignment_map) |
| 243 | { |
| 244 | maios.push_back(i.second.maio); |
| 245 | } |
| 246 | return maios; |
| 247 | } |
| 248 | |
| 249 | std::vector<int> extract_immediate_assignment_impl::get_hsns() |
| 250 | { |
| 251 | std::vector<int> hsns; |
| 252 | BOOST_FOREACH(immediate_assignment_map::value_type &i, d_assignment_map) |
| 253 | { |
| 254 | hsns.push_back(i.second.hsn); |
| 255 | } |
| 256 | return hsns; |
| 257 | } |
| 258 | |
| 259 | std::vector<int> extract_immediate_assignment_impl::get_arfcns() |
| 260 | { |
| 261 | std::vector<int> arfcns; |
| 262 | BOOST_FOREACH(immediate_assignment_map::value_type &i, d_assignment_map) |
| 263 | { |
| 264 | arfcns.push_back(i.second.arfcn); |
| 265 | } |
| 266 | return arfcns; |
| 267 | } |
| 268 | |
| 269 | std::vector<int> extract_immediate_assignment_impl::get_timing_advances() |
| 270 | { |
| 271 | std::vector<int> tas; |
| 272 | BOOST_FOREACH(immediate_assignment_map::value_type &i, d_assignment_map) |
| 273 | { |
| 274 | tas.push_back(i.second.timing_advance); |
| 275 | } |
| 276 | return tas; |
| 277 | } |
| 278 | |
| 279 | std::vector<std::string> extract_immediate_assignment_impl::get_mobile_allocations() |
| 280 | { |
| 281 | std::vector<std::string> mobile_allocations; |
| 282 | BOOST_FOREACH(immediate_assignment_map::value_type &i, d_assignment_map) |
| 283 | { |
| 284 | mobile_allocations.push_back(i.second.mobile_allocation); |
| 285 | } |
| 286 | return mobile_allocations; |
| 287 | } |
| 288 | |
Roman Khassraf | 5bd14f2 | 2015-06-24 17:59:13 +0200 | [diff] [blame] | 289 | extract_immediate_assignment::sptr |
Roman Khassraf | 2b5ca48 | 2015-07-13 10:28:17 +0200 | [diff] [blame^] | 290 | extract_immediate_assignment::make(bool print_immediate_assignments, bool ignore_gprs) |
Roman Khassraf | 5bd14f2 | 2015-06-24 17:59:13 +0200 | [diff] [blame] | 291 | { |
| 292 | return gnuradio::get_initial_sptr |
Roman Khassraf | 2b5ca48 | 2015-07-13 10:28:17 +0200 | [diff] [blame^] | 293 | (new extract_immediate_assignment_impl(print_immediate_assignments, ignore_gprs)); |
Roman Khassraf | 5bd14f2 | 2015-06-24 17:59:13 +0200 | [diff] [blame] | 294 | } |
| 295 | |
| 296 | /* |
| 297 | * The private constructor |
| 298 | */ |
Roman Khassraf | 2b5ca48 | 2015-07-13 10:28:17 +0200 | [diff] [blame^] | 299 | extract_immediate_assignment_impl::extract_immediate_assignment_impl(bool print_immediate_assignments, bool ignore_gprs) |
Roman Khassraf | 5bd14f2 | 2015-06-24 17:59:13 +0200 | [diff] [blame] | 300 | : gr::block("extract_immediate_assignment", |
| 301 | gr::io_signature::make(0, 0, 0), |
| 302 | gr::io_signature::make(0, 0, 0)) |
| 303 | { |
Roman Khassraf | a212ca2 | 2015-07-12 21:19:35 +0200 | [diff] [blame] | 304 | d_print_immediate_assignments = print_immediate_assignments; |
Roman Khassraf | 2b5ca48 | 2015-07-13 10:28:17 +0200 | [diff] [blame^] | 305 | d_ignore_gprs = ignore_gprs; |
Roman Khassraf | 5bd14f2 | 2015-06-24 17:59:13 +0200 | [diff] [blame] | 306 | message_port_register_in(pmt::mp("msgs")); |
| 307 | set_msg_handler(pmt::mp("msgs"), boost::bind(&extract_immediate_assignment_impl::process_message, this, _1)); |
| 308 | } |
| 309 | |
| 310 | /* |
| 311 | * Our virtual destructor. |
| 312 | */ |
| 313 | extract_immediate_assignment_impl::~extract_immediate_assignment_impl() |
| 314 | { |
| 315 | } |
| 316 | } /* namespace gsm */ |
| 317 | } /* namespace gr */ |
| 318 | |