Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 1 | /* gprs_rlcmac.cpp |
| 2 | * |
| 3 | * Copyright (C) 2012 Ivan Klyuchnikov |
| 4 | * |
| 5 | * This program is free software; you can redistribute it and/or |
| 6 | * modify it under the terms of the GNU General Public License |
| 7 | * as published by the Free Software Foundation; either version 2 |
| 8 | * of the License, or (at your option) any later version. |
| 9 | * |
| 10 | * This program is distributed in the hope that it will be useful, |
| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | * GNU General Public License for more details. |
| 14 | * |
| 15 | * You should have received a copy of the GNU General Public License |
| 16 | * along with this program; if not, write to the Free Software |
| 17 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| 18 | */ |
| 19 | |
| 20 | #include <gprs_bssgp_pcu.h> |
| 21 | #include <pcu_l1_if.h> |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 22 | #include <gprs_rlcmac.h> |
Ivan Kluchnikov | 5310d45 | 2012-04-17 22:00:31 +0400 | [diff] [blame] | 23 | #include <gsmL1prim.h> |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 24 | |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 25 | LLIST_HEAD(gprs_rlcmac_tbfs); |
| 26 | void *rlcmac_tall_ctx; |
| 27 | |
| 28 | int tfi_alloc() |
| 29 | { |
| 30 | struct gprs_rlcmac_tbf *tbf; |
| 31 | uint32_t tfi_map = 0; |
| 32 | uint32_t tfi_ind = 0; |
| 33 | uint32_t mask = 1; |
| 34 | uint8_t i; |
| 35 | |
| 36 | llist_for_each_entry(tbf, &gprs_rlcmac_tbfs, list) { |
| 37 | tfi_ind = 1 << tbf->tfi; |
| 38 | tfi_map = tfi_map|tfi_ind; |
| 39 | } |
| 40 | |
| 41 | for (i = 0; i < 32; i++) { |
| 42 | if(((tfi_map >> i) & mask) == 0) { |
| 43 | return i; |
| 44 | } |
| 45 | } |
| 46 | return -1; |
| 47 | } |
| 48 | |
| 49 | /* lookup TBF Entity (by TFI) */ |
Ivan Kluchnikov | a9e6dc5 | 2012-06-17 08:30:06 +0400 | [diff] [blame^] | 50 | static struct gprs_rlcmac_tbf *tbf_by_tfi(uint8_t tfi, gprs_rlcmac_tbf_direction dir) |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 51 | { |
| 52 | struct gprs_rlcmac_tbf *tbf; |
| 53 | |
| 54 | llist_for_each_entry(tbf, &gprs_rlcmac_tbfs, list) { |
Ivan Kluchnikov | a9e6dc5 | 2012-06-17 08:30:06 +0400 | [diff] [blame^] | 55 | if ((tbf->tfi == tfi)&&(tbf->direction == dir)) |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 56 | return tbf; |
| 57 | } |
| 58 | return NULL; |
| 59 | } |
| 60 | |
Ivan Kluchnikov | a9e6dc5 | 2012-06-17 08:30:06 +0400 | [diff] [blame^] | 61 | static struct gprs_rlcmac_tbf *tbf_by_tlli(uint32_t tlli, gprs_rlcmac_tbf_direction dir) |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 62 | { |
| 63 | struct gprs_rlcmac_tbf *tbf; |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 64 | llist_for_each_entry(tbf, &gprs_rlcmac_tbfs, list) { |
Ivan Kluchnikov | a9e6dc5 | 2012-06-17 08:30:06 +0400 | [diff] [blame^] | 65 | if ((tbf->tlli == tlli)&&(tbf->direction == dir)) |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 66 | return tbf; |
| 67 | } |
| 68 | return NULL; |
| 69 | } |
| 70 | |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 71 | static void tbf_free(struct gprs_rlcmac_tbf *tbf) |
| 72 | { |
| 73 | llist_del(&tbf->list); |
| 74 | talloc_free(tbf); |
| 75 | } |
| 76 | |
Ivan Kluchnikov | a9e6dc5 | 2012-06-17 08:30:06 +0400 | [diff] [blame^] | 77 | /* Lookup LLC PDU in TBF list of LLC PDUs by number. */ |
| 78 | static struct tbf_llc_pdu *tbf_llc_pdu_by_num(struct llist_head llc_pdus, uint8_t num) |
| 79 | { |
| 80 | struct tbf_llc_pdu *llc_pdu; |
| 81 | |
| 82 | llist_for_each_entry(llc_pdu, &llc_pdus, list) { |
| 83 | if (llc_pdu->num == num) |
| 84 | return llc_pdu; |
| 85 | } |
| 86 | return NULL; |
| 87 | } |
| 88 | |
| 89 | /* Add new LLC PDU to the TBF list of LLC PDUs. */ |
| 90 | int tbf_add_llc_pdu(struct gprs_rlcmac_tbf *tbf, uint8_t *data, uint16_t llc_pdu_len) |
| 91 | { |
| 92 | struct tbf_llc_pdu *llc_pdu; |
| 93 | |
| 94 | llc_pdu = talloc_zero(rlcmac_tall_ctx, struct tbf_llc_pdu); |
| 95 | if (!llc_pdu) |
| 96 | return 0; |
| 97 | |
| 98 | llc_pdu->num = tbf->llc_pdu_list_len; |
| 99 | llc_pdu->len = llc_pdu_len; |
| 100 | |
| 101 | LOGP(DBSSGP, LOGL_NOTICE, "LLC PDU = "); |
| 102 | for (unsigned i = 0; i < llc_pdu_len; i++) |
| 103 | { |
| 104 | llc_pdu->data[i] = data[i]; |
| 105 | LOGPC(DBSSGP, LOGL_NOTICE, "%02x", llc_pdu->data[i]); |
| 106 | } |
| 107 | LOGP(DBSSGP, LOGL_NOTICE, "\n"); |
| 108 | |
| 109 | llist_add(&llc_pdu->list, &tbf->llc_pdus); |
| 110 | tbf->llc_pdu_list_len++; |
| 111 | return 1; |
| 112 | } |
| 113 | |
| 114 | struct gprs_rlcmac_tbf *tbf_alloc(gprs_rlcmac_tbf_direction dir, uint32_t tlli) |
| 115 | { |
| 116 | struct gprs_rlcmac_tbf *exist_tbf; |
| 117 | struct gprs_rlcmac_tbf *tbf; |
| 118 | uint8_t tfi; |
| 119 | |
| 120 | // Downlink TDF allocation |
| 121 | if (dir == GPRS_RLCMAC_DL_TBF) |
| 122 | { |
| 123 | // Try to find already exist DL TBF |
| 124 | exist_tbf = tbf_by_tlli(tlli, GPRS_RLCMAC_DL_TBF); |
| 125 | if (exist_tbf) |
| 126 | { |
| 127 | // if DL TBF is in establish or data transfer state, |
| 128 | // send additional LLC PDU during current DL TBF. |
| 129 | if (exist_tbf->stage != TBF_RELEASE) |
| 130 | { |
| 131 | if (exist_tbf->state != FINISH_DATA_TRANSFER) |
| 132 | { |
| 133 | return exist_tbf; |
| 134 | } |
| 135 | } |
| 136 | } |
| 137 | |
| 138 | //Try to find already exist UL TBF |
| 139 | exist_tbf = tbf_by_tlli(tlli, GPRS_RLCMAC_UL_TBF); |
| 140 | if (exist_tbf) |
| 141 | { |
| 142 | // if UL TBF is in data transfer state, |
| 143 | // establish new DL TBF during current UL TBF. |
| 144 | if (exist_tbf->stage == TBF_DATA_TRANSFER && !(exist_tbf->next_tbf)) |
| 145 | { |
| 146 | tbf = talloc_zero(rlcmac_tall_ctx, struct gprs_rlcmac_tbf); |
| 147 | if (tbf) |
| 148 | { |
| 149 | // Create new TBF |
| 150 | tfi = tfi_alloc(); |
| 151 | if (tfi < 0) { |
| 152 | return NULL; |
| 153 | } |
| 154 | tbf->tfi = tfi; |
| 155 | tbf->llc_pdus = LLIST_HEAD_INIT(tbf->llc_pdus); |
| 156 | tbf->llc_pdu_list_len = 0; |
| 157 | tbf->direction = GPRS_RLCMAC_DL_TBF; |
| 158 | tbf->stage = TBF_ESTABLISH; |
| 159 | tbf->state = WAIT_ESTABLISH; |
| 160 | tbf->tlli = tlli; |
| 161 | llist_add(&tbf->list, &gprs_rlcmac_tbfs); |
| 162 | exist_tbf->next_tbf = tbf; |
| 163 | return tbf; |
| 164 | } |
| 165 | else |
| 166 | { |
| 167 | return NULL; |
| 168 | } |
| 169 | } |
| 170 | } |
| 171 | |
| 172 | // No UL and DL TBFs for current TLLI are found. |
| 173 | if (!exist_tbf) |
| 174 | { |
| 175 | tbf = talloc_zero(rlcmac_tall_ctx, struct gprs_rlcmac_tbf); |
| 176 | if (tbf) |
| 177 | { |
| 178 | // Create new TBF |
| 179 | tfi = tfi_alloc(); |
| 180 | if (tfi < 0) { |
| 181 | return NULL; |
| 182 | } |
| 183 | tbf->tfi = tfi; |
| 184 | tbf->llc_pdus = LLIST_HEAD_INIT(tbf->llc_pdus); |
| 185 | tbf->llc_pdu_list_len = 0; |
| 186 | tbf->direction = GPRS_RLCMAC_DL_TBF; |
| 187 | tbf->stage = TBF_ESTABLISH; |
| 188 | tbf->state = CCCH_ESTABLISH; |
| 189 | tbf->tlli = tlli; |
| 190 | llist_add(&tbf->list, &gprs_rlcmac_tbfs); |
| 191 | return tbf; |
| 192 | } |
| 193 | else |
| 194 | { |
| 195 | return NULL; |
| 196 | } |
| 197 | } |
| 198 | } |
| 199 | else |
| 200 | { |
| 201 | // Uplink TBF allocation |
| 202 | tbf = talloc_zero(rlcmac_tall_ctx, struct gprs_rlcmac_tbf); |
| 203 | if (tbf) |
| 204 | { |
| 205 | // Create new TBF |
| 206 | tfi = tfi_alloc(); |
| 207 | if (tfi < 0) { |
| 208 | return NULL; |
| 209 | } |
| 210 | tbf->tfi = tfi; |
| 211 | tbf->llc_pdus = LLIST_HEAD_INIT(tbf->llc_pdus); |
| 212 | tbf->llc_pdu_list_len = 0; |
| 213 | tbf->direction = GPRS_RLCMAC_UL_TBF; |
| 214 | tbf->stage = TBF_ESTABLISH; |
| 215 | tbf->state = WAIT_ESTABLISH; |
| 216 | tbf->next_tbf = NULL; |
| 217 | llist_add(&tbf->list, &gprs_rlcmac_tbfs); |
| 218 | return tbf; |
| 219 | } |
| 220 | else |
| 221 | { |
| 222 | return NULL; |
| 223 | } |
| 224 | } |
| 225 | } |
| 226 | |
| 227 | /* Management of uplink TBF establishment. */ |
| 228 | int tbf_ul_establish(struct gprs_rlcmac_tbf *tbf, uint8_t ra, uint32_t Fn, uint16_t ta) |
| 229 | { |
| 230 | if (tbf->direction != GPRS_RLCMAC_UL_TBF) |
| 231 | { |
| 232 | return -1; |
| 233 | } |
| 234 | |
| 235 | if (tbf->stage == TBF_ESTABLISH) |
| 236 | { |
| 237 | switch (tbf->state) { |
| 238 | case WAIT_ESTABLISH: |
| 239 | { |
| 240 | LOGP(DRLCMAC, LOGL_NOTICE, "TBF: [UPLINK] START TFI: %u\n", tbf->tfi); |
| 241 | LOGP(DRLCMAC, LOGL_NOTICE, "RX: [PCU <- BTS] TFI: %u RACH\n", tbf->tfi); |
| 242 | LOGP(DRLCMAC, LOGL_NOTICE, "TX: [PCU -> BTS] TFI: %u Packet Immidiate Assignment\n", tbf->tfi); |
| 243 | bitvec *immediate_assignment = bitvec_alloc(23); |
| 244 | bitvec_unhex(immediate_assignment, "2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b"); |
| 245 | int len = write_immediate_assignment(immediate_assignment, 0, ra, Fn, ta, tbf->tfi); |
| 246 | pcu_l1if_tx(immediate_assignment, GsmL1_Sapi_Agch, len); |
| 247 | bitvec_free(immediate_assignment); |
| 248 | tbf->state = FINISH_ESTABLISH; |
| 249 | } |
| 250 | break; |
| 251 | default: |
| 252 | LOGP(DRLCMAC, LOGL_NOTICE, "TBF: [UPLINK] TFI: %u Unexpected TBF state = %u for stage = %u \n", |
| 253 | tbf->tfi, tbf->state, tbf->stage); |
| 254 | break; |
| 255 | } |
| 256 | } |
| 257 | else |
| 258 | { |
| 259 | return -1; |
| 260 | } |
| 261 | |
| 262 | return 1; |
| 263 | } |
| 264 | |
| 265 | /* Management of downlink TBF establishment. */ |
| 266 | int tbf_dl_establish(struct gprs_rlcmac_tbf *tbf, uint8_t *imsi) |
| 267 | { |
| 268 | if (tbf->direction != GPRS_RLCMAC_DL_TBF) |
| 269 | { |
| 270 | return -1; |
| 271 | } |
| 272 | |
| 273 | if (tbf->stage == TBF_ESTABLISH) |
| 274 | { |
| 275 | switch (tbf->state) { |
| 276 | case WAIT_ESTABLISH: |
| 277 | // Wait while UL TBF establishes DL TBF. |
| 278 | LOGP(DRLCMAC, LOGL_NOTICE, "TBF: [DOWNLINK] TFI: Wait DL TBF establishment by UL TBF", tbf->tfi); |
| 279 | break; |
| 280 | case CCCH_ESTABLISH: |
| 281 | if (imsi) |
| 282 | { |
| 283 | // Downlink TBF Establishment on CCCH ( Paging procedure ) |
| 284 | // TODO: Implement paging procedure on CCCH. |
| 285 | LOGP(DRLCMAC, LOGL_NOTICE, "TBF: [DOWNLINK] TFI: Paging procedure on CCCH : Not implemented yet", tbf->tfi); |
| 286 | } |
| 287 | else |
| 288 | { |
| 289 | // Downlink TBF Establishment on CCCH ( Immediate Assignment ) |
| 290 | gprs_rlcmac_downlink_assignment(tbf); |
| 291 | } |
| 292 | tbf->state = FINISH_ESTABLISH; |
| 293 | break; |
| 294 | case PACCH_ESTABLISH: |
| 295 | // Downlink TBF Establishment on PACCH ( Packet Immediate Assignment ) |
| 296 | gprs_rlcmac_packet_downlink_assignment(tbf); |
| 297 | tbf->state = FINISH_ESTABLISH; |
| 298 | break; |
| 299 | default: |
| 300 | LOGP(DRLCMAC, LOGL_NOTICE, "TBF: [DOWNLINK] TFI: %u Unexpected TBF state = %u for stage = %u \n", |
| 301 | tbf->tfi, tbf->state, tbf->stage); |
| 302 | break; |
| 303 | } |
| 304 | } |
| 305 | return 1; |
| 306 | } |
| 307 | |
| 308 | /* Management of uplink TBF data transfer. */ |
| 309 | int tbf_ul_data_transfer(struct gprs_rlcmac_tbf *tbf, RlcMacUplinkDataBlock_t * ul_data_block) |
| 310 | { |
| 311 | if ((tbf->stage == TBF_RELEASE)||(tbf->direction != GPRS_RLCMAC_UL_TBF)) |
| 312 | { |
| 313 | return -1; |
| 314 | } |
| 315 | |
| 316 | if (tbf->stage == TBF_ESTABLISH) |
| 317 | { |
| 318 | tbf->stage = TBF_DATA_TRANSFER; |
| 319 | tbf->state = WAIT_DATA_TRANSFER; |
| 320 | } |
| 321 | |
| 322 | if (ul_data_block->TI == 1) |
| 323 | { |
| 324 | tbf->tlli = ul_data_block->TLLI; |
| 325 | // TODO: Kill all other UL TBFs with this TLLI. |
| 326 | } |
| 327 | |
| 328 | switch (tbf->state) { |
| 329 | case WAIT_DATA_TRANSFER: |
| 330 | if (ul_data_block->BSN == 0) |
| 331 | { |
| 332 | tbf->data_index = 0; |
| 333 | gprs_rlcmac_data_block_parse(tbf, ul_data_block); |
| 334 | gprs_rlcmac_tx_ul_ack(tbf->tfi, tbf->tlli, ul_data_block); |
| 335 | if (ul_data_block->CV == 0) |
| 336 | { |
| 337 | // Recieved last Data Block in this sequence. |
| 338 | tbf->state = FINISH_DATA_TRANSFER; |
| 339 | gprs_rlcmac_tx_ul_ud(tbf); |
| 340 | } |
| 341 | else |
| 342 | { |
| 343 | tbf->bsn = ul_data_block->BSN; |
| 344 | tbf->state = DATA_TRANSFER; |
| 345 | } |
| 346 | } |
| 347 | break; |
| 348 | case DATA_TRANSFER: |
| 349 | if (tbf->bsn == (ul_data_block->BSN - 1)) |
| 350 | { |
| 351 | gprs_rlcmac_data_block_parse(tbf, ul_data_block); |
| 352 | gprs_rlcmac_tx_ul_ack(tbf->tfi, tbf->tlli, ul_data_block); |
| 353 | if (ul_data_block->CV == 0) |
| 354 | { |
| 355 | // Recieved last Data Block in this sequence. |
| 356 | tbf->state = FINISH_DATA_TRANSFER; |
| 357 | gprs_rlcmac_tx_ul_ud(tbf); |
| 358 | } |
| 359 | else |
| 360 | { |
| 361 | tbf->bsn = ul_data_block->BSN; |
| 362 | } |
| 363 | } |
| 364 | break; |
| 365 | case FINISH_DATA_TRANSFER: |
| 366 | // Now we just ignore all Data Blocks and wait release of TBF. |
| 367 | break; |
| 368 | default: |
| 369 | LOGP(DRLCMAC, LOGL_NOTICE, "TBF: [UPLINK] TFI: %u Unexpected TBF state = %u for stage = %u \n", |
| 370 | tbf->tfi, tbf->state, tbf->stage); |
| 371 | break; |
| 372 | } |
| 373 | |
| 374 | if ((tbf->state == FINISH_DATA_TRANSFER) && (tbf->next_tbf)) |
| 375 | { |
| 376 | // Establish DL TBF, if it is required. |
| 377 | if ((tbf->next_tbf)->state == WAIT_ESTABLISH) |
| 378 | { |
| 379 | (tbf->next_tbf)->state = PACCH_ESTABLISH; |
| 380 | tbf_dl_establish(tbf->next_tbf); |
| 381 | } |
| 382 | } |
| 383 | |
| 384 | return 1; |
| 385 | } |
| 386 | |
| 387 | /* Management of downlink TBF data transfer. */ |
| 388 | int tbf_dl_data_transfer(struct gprs_rlcmac_tbf *tbf, uint8_t *llc_pdu, uint16_t llc_pdu_len) |
| 389 | { |
| 390 | if ((tbf->stage == TBF_RELEASE) || (tbf->direction != GPRS_RLCMAC_DL_TBF)) |
| 391 | { |
| 392 | return -1; |
| 393 | } |
| 394 | |
| 395 | if (llc_pdu_len > 0) |
| 396 | { |
| 397 | tbf_add_llc_pdu(tbf, llc_pdu, llc_pdu_len); |
| 398 | } |
| 399 | |
| 400 | if (tbf->stage == TBF_ESTABLISH) |
| 401 | { |
| 402 | if (tbf->state == FINISH_ESTABLISH) |
| 403 | { |
| 404 | tbf->stage = TBF_DATA_TRANSFER; |
| 405 | tbf->state = DATA_TRANSFER; |
| 406 | } |
| 407 | } |
| 408 | |
| 409 | if (tbf->stage == TBF_DATA_TRANSFER) |
| 410 | { |
| 411 | switch (tbf->state) { |
| 412 | case DATA_TRANSFER: |
| 413 | gprs_rlcmac_tx_llc_pdus(tbf); |
| 414 | tbf->state = FINISH_DATA_TRANSFER; |
| 415 | break; |
| 416 | default: |
| 417 | LOGP(DRLCMAC, LOGL_NOTICE, "TBF: [DOWNLINK] TFI: %u Unexpected TBF state = %u for stage = %u \n", |
| 418 | tbf->tfi, tbf->state, tbf->stage); |
| 419 | break; |
| 420 | } |
| 421 | } |
| 422 | |
| 423 | return 1; |
| 424 | } |
| 425 | |
| 426 | /* Management of uplink TBF release. */ |
| 427 | int tbf_ul_release(struct gprs_rlcmac_tbf *tbf) |
| 428 | { |
| 429 | if (tbf->direction != GPRS_RLCMAC_UL_TBF) |
| 430 | { |
| 431 | return -1; |
| 432 | } |
| 433 | |
| 434 | if (tbf->next_tbf) |
| 435 | { |
| 436 | // UL TBF data transfer is finished, start DL TBF data transfer. |
| 437 | tbf_dl_data_transfer(tbf->next_tbf); |
| 438 | } |
| 439 | tbf->stage = TBF_RELEASE; |
| 440 | tbf->state = RELEASE; |
| 441 | LOGP(DRLCMAC, LOGL_NOTICE, "TBF: [UPLINK] END TFI: %u TLLI: 0x%08x \n", tbf->tfi, tbf->tlli); |
| 442 | tbf_free(tbf); |
| 443 | return 1; |
| 444 | } |
| 445 | |
| 446 | /* Management of downlink TBF release. */ |
| 447 | int tbf_dl_release(struct gprs_rlcmac_tbf *tbf) |
| 448 | { |
| 449 | if (tbf->direction != GPRS_RLCMAC_DL_TBF) |
| 450 | { |
| 451 | return -1; |
| 452 | } |
| 453 | |
| 454 | tbf->stage = TBF_RELEASE; |
| 455 | tbf->state = RELEASE; |
| 456 | LOGP(DRLCMAC, LOGL_NOTICE, "TBF: [DOWNLINK] END TFI: %u TLLI: 0x%08x \n", tbf->tfi, tbf->tlli); |
| 457 | tbf_free(tbf); |
| 458 | return 1; |
| 459 | } |
Ivan Kluchnikov | 61a33f7 | 2012-04-12 15:22:06 +0400 | [diff] [blame] | 460 | |
| 461 | static void tbf_timer_cb(void *_tbf) |
| 462 | { |
| 463 | struct gprs_rlcmac_tbf *tbf = (struct gprs_rlcmac_tbf *)_tbf; |
| 464 | |
| 465 | tbf->num_T_exp++; |
| 466 | |
| 467 | switch (tbf->T) { |
| 468 | case 1111: |
| 469 | // TODO: We should add timers for TBF. |
| 470 | break; |
| 471 | default: |
Ivan Kluchnikov | 856221f | 2012-06-15 09:31:29 +0400 | [diff] [blame] | 472 | LOGP(DRLCMAC, LOGL_NOTICE, "Timer expired in unknown mode: %u \n", tbf->T); |
Ivan Kluchnikov | 61a33f7 | 2012-04-12 15:22:06 +0400 | [diff] [blame] | 473 | } |
| 474 | } |
| 475 | |
| 476 | static void tbf_timer_start(struct gprs_rlcmac_tbf *tbf, unsigned int T, |
| 477 | unsigned int seconds) |
| 478 | { |
| 479 | if (osmo_timer_pending(&tbf->timer)) |
Ivan Kluchnikov | 856221f | 2012-06-15 09:31:29 +0400 | [diff] [blame] | 480 | LOGP(DRLCMAC, LOGL_NOTICE, "Starting TBF timer %u while old timer %u pending \n", T, tbf->T); |
Ivan Kluchnikov | 61a33f7 | 2012-04-12 15:22:06 +0400 | [diff] [blame] | 481 | tbf->T = T; |
| 482 | tbf->num_T_exp = 0; |
| 483 | |
| 484 | /* FIXME: we should do this only once ? */ |
| 485 | tbf->timer.data = tbf; |
| 486 | tbf->timer.cb = &tbf_timer_cb; |
| 487 | |
| 488 | osmo_timer_schedule(&tbf->timer, seconds, 0); |
| 489 | } |
| 490 | |
| 491 | |
| 492 | static void tbf_gsm_timer_cb(void *_tbf) |
| 493 | { |
| 494 | struct gprs_rlcmac_tbf *tbf = (struct gprs_rlcmac_tbf *)_tbf; |
| 495 | |
| 496 | tbf->num_fT_exp++; |
| 497 | |
| 498 | switch (tbf->fT) { |
Ivan Kluchnikov | a9e6dc5 | 2012-06-17 08:30:06 +0400 | [diff] [blame^] | 499 | case 2: |
| 500 | tbf_dl_data_transfer(tbf); |
Ivan Kluchnikov | 61a33f7 | 2012-04-12 15:22:06 +0400 | [diff] [blame] | 501 | break; |
| 502 | default: |
Ivan Kluchnikov | 856221f | 2012-06-15 09:31:29 +0400 | [diff] [blame] | 503 | LOGP(DRLCMAC, LOGL_NOTICE, "Timer expired in unknown mode: %u \n", tbf->fT); |
Ivan Kluchnikov | 61a33f7 | 2012-04-12 15:22:06 +0400 | [diff] [blame] | 504 | } |
| 505 | } |
| 506 | |
| 507 | static void tbf_gsm_timer_start(struct gprs_rlcmac_tbf *tbf, unsigned int fT, |
| 508 | int frames) |
| 509 | { |
| 510 | if (osmo_gsm_timer_pending(&tbf->gsm_timer)) |
Ivan Kluchnikov | 856221f | 2012-06-15 09:31:29 +0400 | [diff] [blame] | 511 | LOGP(DRLCMAC, LOGL_NOTICE, "Starting TBF timer %u while old timer %u pending \n", fT, tbf->fT); |
Ivan Kluchnikov | 61a33f7 | 2012-04-12 15:22:06 +0400 | [diff] [blame] | 512 | tbf->fT = fT; |
| 513 | tbf->num_fT_exp = 0; |
| 514 | |
| 515 | /* FIXME: we should do this only once ? */ |
| 516 | tbf->gsm_timer.data = tbf; |
| 517 | tbf->gsm_timer.cb = &tbf_gsm_timer_cb; |
| 518 | |
| 519 | osmo_gsm_timer_schedule(&tbf->gsm_timer, frames); |
| 520 | } |
| 521 | |
Ivan Kluchnikov | 0b450c1 | 2012-05-24 22:47:12 +0400 | [diff] [blame] | 522 | void write_packet_downlink_assignment(bitvec * dest, uint8_t tfi, uint32_t tlli, uint8_t tn, uint8_t ta, uint8_t tsc) |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 523 | { |
| 524 | // TODO We should use our implementation of encode RLC/MAC Control messages. |
| 525 | unsigned wp = 0; |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 526 | bitvec_write_field(dest, wp,0x1,2); // Payload Type |
| 527 | bitvec_write_field(dest, wp,0x0,2); // Uplink block with TDMA framenumber |
| 528 | bitvec_write_field(dest, wp,0x1,1); // Suppl/Polling Bit |
| 529 | bitvec_write_field(dest, wp,0x1,3); // Uplink state flag |
| 530 | bitvec_write_field(dest, wp,0x2,6); // MESSAGE TYPE |
| 531 | bitvec_write_field(dest, wp,0x0,2); // Page Mode |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 532 | |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 533 | bitvec_write_field(dest, wp,0x0,1); // switch PERSIST_LEVEL: off |
Ivan Kluchnikov | 0b450c1 | 2012-05-24 22:47:12 +0400 | [diff] [blame] | 534 | bitvec_write_field(dest, wp,0x0,1); // switch TFI : on |
| 535 | bitvec_write_field(dest, wp,0x0,1); // switch UPLINK TFI : on |
| 536 | bitvec_write_field(dest, wp,tfi-1,5); // TFI |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 537 | |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 538 | bitvec_write_field(dest, wp,0x0,1); // Message escape |
| 539 | bitvec_write_field(dest, wp,0x0,2); // Medium Access Method: Dynamic Allocation |
| 540 | bitvec_write_field(dest, wp,0x0,1); // RLC acknowledged mode |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 541 | |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 542 | bitvec_write_field(dest, wp,0x0,1); // the network establishes no new downlink TBF for the mobile station |
| 543 | bitvec_write_field(dest, wp,0x1,8); // timeslot 7 |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 544 | |
Ivan Kluchnikov | 0b450c1 | 2012-05-24 22:47:12 +0400 | [diff] [blame] | 545 | bitvec_write_field(dest, wp,0x1,1); // switch TIMING_ADVANCE_VALUE = on |
| 546 | bitvec_write_field(dest, wp,ta,6); // TIMING_ADVANCE_VALUE |
| 547 | bitvec_write_field(dest, wp,0x0,1); // switch TIMING_ADVANCE_INDEX = off |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 548 | |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 549 | bitvec_write_field(dest, wp,0x0,1); // switch POWER CONTROL = off |
| 550 | bitvec_write_field(dest, wp,0x1,1); // Frequency Parameters information elements = present |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 551 | |
Ivan Kluchnikov | 0b450c1 | 2012-05-24 22:47:12 +0400 | [diff] [blame] | 552 | bitvec_write_field(dest, wp,tsc,3); // Training Sequence Code (TSC) = 2 |
| 553 | bitvec_write_field(dest, wp,0x0,2); // ARFCN = present |
| 554 | bitvec_write_field(dest, wp,599,10); // ARFCN |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 555 | |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 556 | bitvec_write_field(dest, wp,0x1,1); // switch TFI : on |
| 557 | bitvec_write_field(dest, wp,tfi,5);// TFI |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 558 | |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 559 | bitvec_write_field(dest, wp,0x1,1); // Power Control Parameters IE = present |
| 560 | bitvec_write_field(dest, wp,0x0,4); // ALPHA power control parameter |
| 561 | bitvec_write_field(dest, wp,0x0,1); // switch GAMMA_TN0 = off |
| 562 | bitvec_write_field(dest, wp,0x0,1); // switch GAMMA_TN1 = off |
| 563 | bitvec_write_field(dest, wp,0x0,1); // switch GAMMA_TN2 = off |
| 564 | bitvec_write_field(dest, wp,0x0,1); // switch GAMMA_TN3 = off |
| 565 | bitvec_write_field(dest, wp,0x0,1); // switch GAMMA_TN4 = off |
| 566 | bitvec_write_field(dest, wp,0x0,1); // switch GAMMA_TN5 = off |
| 567 | bitvec_write_field(dest, wp,0x0,1); // switch GAMMA_TN6 = off |
| 568 | bitvec_write_field(dest, wp,0x1,1); // switch GAMMA_TN7 = on |
| 569 | bitvec_write_field(dest, wp,0x0,5); // GAMMA_TN7 |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 570 | |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 571 | bitvec_write_field(dest, wp,0x0,1); // TBF Starting TIME IE not present |
| 572 | bitvec_write_field(dest, wp,0x0,1); // Measurement Mapping struct not present |
Ivan Kluchnikov | 0b450c1 | 2012-05-24 22:47:12 +0400 | [diff] [blame] | 573 | bitvec_write_field(dest, wp,0x0,1); |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 574 | } |
| 575 | |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 576 | void write_packet_uplink_assignment(bitvec * dest, uint8_t tfi, uint32_t tlli) |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 577 | { |
| 578 | // TODO We should use our implementation of encode RLC/MAC Control messages. |
| 579 | unsigned wp = 0; |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 580 | bitvec_write_field(dest, wp,0x1,2); // Payload Type |
| 581 | bitvec_write_field(dest, wp,0x0,2); // Uplink block with TDMA framenumber |
| 582 | bitvec_write_field(dest, wp,0x1,1); // Suppl/Polling Bit |
| 583 | bitvec_write_field(dest, wp,0x1,3); // Uplink state flag |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 584 | |
| 585 | |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 586 | bitvec_write_field(dest, wp,0xa,6); // MESSAGE TYPE |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 587 | |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 588 | bitvec_write_field(dest, wp,0x0,2); // Page Mode |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 589 | |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 590 | bitvec_write_field(dest, wp,0x0,1); // switch PERSIST_LEVEL: off |
| 591 | bitvec_write_field(dest, wp,0x2,2); // switch TLLI : on |
| 592 | bitvec_write_field(dest, wp,tlli,32); // TLLI |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 593 | |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 594 | bitvec_write_field(dest, wp,0x0,1); // Message escape |
| 595 | bitvec_write_field(dest, wp,0x0,2); // CHANNEL_CODING_COMMAND |
| 596 | bitvec_write_field(dest, wp,0x0,1); // TLLI_BLOCK_CHANNEL_CODING |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 597 | |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 598 | bitvec_write_field(dest, wp,0x1,1); // switch TIMING_ADVANCE_VALUE = on |
| 599 | bitvec_write_field(dest, wp,0x0,6); // TIMING_ADVANCE_VALUE |
| 600 | bitvec_write_field(dest, wp,0x0,1); // switch TIMING_ADVANCE_INDEX = off |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 601 | |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 602 | bitvec_write_field(dest, wp,0x0,1); // Frequency Parameters = off |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 603 | |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 604 | bitvec_write_field(dest, wp,0x1,2); // Dynamic Allocation = off |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 605 | |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 606 | bitvec_write_field(dest, wp,0x0,1); // Dynamic Allocation |
| 607 | bitvec_write_field(dest, wp,0x0,1); // P0 = off |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 608 | |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 609 | bitvec_write_field(dest, wp,0x1,1); // USF_GRANULARITY |
| 610 | bitvec_write_field(dest, wp,0x1,1); // switch TFI : on |
| 611 | bitvec_write_field(dest, wp,tfi,5);// TFI |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 612 | |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 613 | bitvec_write_field(dest, wp,0x0,1); // |
| 614 | bitvec_write_field(dest, wp,0x0,1); // TBF Starting Time = off |
| 615 | bitvec_write_field(dest, wp,0x0,1); // Timeslot Allocation |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 616 | |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 617 | bitvec_write_field(dest, wp,0x0,5); // USF_TN 0 - 4 |
| 618 | bitvec_write_field(dest, wp,0x1,1); // USF_TN 5 |
| 619 | bitvec_write_field(dest, wp,0x1,3); // USF_TN 5 |
| 620 | bitvec_write_field(dest, wp,0x0,2); // USF_TN 6 - 7 |
| 621 | // bitvec_write_field(dest, wp,0x0,1); // Measurement Mapping struct not present |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 622 | } |
| 623 | |
Ivan Kluchnikov | 5310d45 | 2012-04-17 22:00:31 +0400 | [diff] [blame] | 624 | // GSM 04.08 9.1.18 Immediate assignment |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 625 | int write_immediate_assignment(bitvec * dest, uint8_t downlink, uint8_t ra, uint32_t fn, |
Ivan Kluchnikov | a9e6dc5 | 2012-06-17 08:30:06 +0400 | [diff] [blame^] | 626 | uint8_t ta, uint8_t tfi, uint32_t tlli) |
Ivan Kluchnikov | 5310d45 | 2012-04-17 22:00:31 +0400 | [diff] [blame] | 627 | { |
| 628 | unsigned wp = 0; |
| 629 | |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 630 | bitvec_write_field(dest, wp,0x0,4); // Skip Indicator |
| 631 | bitvec_write_field(dest, wp,0x6,4); // Protocol Discriminator |
| 632 | bitvec_write_field(dest, wp,0x3F,8); // Immediate Assignment Message Type |
Ivan Kluchnikov | 5310d45 | 2012-04-17 22:00:31 +0400 | [diff] [blame] | 633 | |
| 634 | // 10.5.2.25b Dedicated mode or TBF |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 635 | bitvec_write_field(dest, wp,0x0,1); // spare |
| 636 | bitvec_write_field(dest, wp,0x0,1); // TMA : Two-message assignment: No meaning |
| 637 | bitvec_write_field(dest, wp,downlink,1); // Downlink : Downlink assignment to mobile in packet idle mode |
| 638 | bitvec_write_field(dest, wp,0x1,1); // T/D : TBF or dedicated mode: this message assigns a Temporary Block Flow (TBF). |
Ivan Kluchnikov | 5310d45 | 2012-04-17 22:00:31 +0400 | [diff] [blame] | 639 | |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 640 | bitvec_write_field(dest, wp,0x0,4); // Page Mode |
Ivan Kluchnikov | 5310d45 | 2012-04-17 22:00:31 +0400 | [diff] [blame] | 641 | |
| 642 | // GSM 04.08 10.5.2.25a Packet Channel Description |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 643 | bitvec_write_field(dest, wp,0x1,5); // Channel type |
| 644 | bitvec_write_field(dest, wp,(l1fh->fl1h)->channel_info.tn,3); // TN |
| 645 | bitvec_write_field(dest, wp,(l1fh->fl1h)->channel_info.tsc,3); // TSC |
| 646 | bitvec_write_field(dest, wp,0x0,3); // non-hopping RF channel configuraion |
| 647 | bitvec_write_field(dest, wp,(l1fh->fl1h)->channel_info.arfcn,10); // ARFCN |
Ivan Kluchnikov | 5310d45 | 2012-04-17 22:00:31 +0400 | [diff] [blame] | 648 | |
| 649 | //10.5.2.30 Request Reference |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 650 | bitvec_write_field(dest, wp,ra,8); // RA |
| 651 | bitvec_write_field(dest, wp,(fn / (26 * 51)) % 32,5); // T1' |
| 652 | bitvec_write_field(dest, wp,fn % 51,6); // T3 |
| 653 | bitvec_write_field(dest, wp,fn % 26,5); // T2 |
Ivan Kluchnikov | 5310d45 | 2012-04-17 22:00:31 +0400 | [diff] [blame] | 654 | |
| 655 | // 10.5.2.40 Timing Advance |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 656 | bitvec_write_field(dest, wp,0x0,2); // spare |
| 657 | bitvec_write_field(dest, wp,ta,6); // Timing Advance value |
Ivan Kluchnikov | 5310d45 | 2012-04-17 22:00:31 +0400 | [diff] [blame] | 658 | |
| 659 | // No mobile allocation in non-hopping systems. |
| 660 | // A zero-length LV. Just write L=0. |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 661 | bitvec_write_field(dest, wp,0,8); |
Ivan Kluchnikov | 5310d45 | 2012-04-17 22:00:31 +0400 | [diff] [blame] | 662 | |
| 663 | if (downlink) |
| 664 | { |
| 665 | // GSM 04.08 10.5.2.16 IA Rest Octets |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 666 | bitvec_write_field(dest, wp, 3, 2); // "HH" |
| 667 | bitvec_write_field(dest, wp, 1, 2); // "01" Packet Downlink Assignment |
| 668 | bitvec_write_field(dest, wp,tlli,32); // TLLI |
| 669 | bitvec_write_field(dest, wp,0x1,1); // switch TFI : on |
| 670 | bitvec_write_field(dest, wp,tfi,5); // TFI |
| 671 | bitvec_write_field(dest, wp,0x0,1); // RLC acknowledged mode |
| 672 | bitvec_write_field(dest, wp,0x0,1); // ALPHA = present |
| 673 | bitvec_write_field(dest, wp,0x0,5); // GAMMA power control parameter |
| 674 | bitvec_write_field(dest, wp,0x0,1); // Polling Bit |
| 675 | bitvec_write_field(dest, wp,0x1,1); // TA_VALID ??? |
| 676 | bitvec_write_field(dest, wp,0x1,1); // switch TIMING_ADVANCE_INDEX = on |
| 677 | bitvec_write_field(dest, wp,0x0,4); // TIMING_ADVANCE_INDEX |
| 678 | bitvec_write_field(dest, wp,0x0,1); // TBF Starting TIME present |
| 679 | bitvec_write_field(dest, wp,0x0,1); // P0 not present |
| 680 | bitvec_write_field(dest, wp,0x1,1); // P0 not present |
| 681 | bitvec_write_field(dest, wp,0xb,4); |
Ivan Kluchnikov | 5310d45 | 2012-04-17 22:00:31 +0400 | [diff] [blame] | 682 | } |
| 683 | else |
| 684 | { |
| 685 | // GMS 04.08 10.5.2.37b 10.5.2.16 |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 686 | bitvec_write_field(dest, wp, 3, 2); // "HH" |
| 687 | bitvec_write_field(dest, wp, 0, 2); // "0" Packet Uplink Assignment |
| 688 | bitvec_write_field(dest, wp, 1, 1); // Block Allocation : Not Single Block Allocation |
| 689 | bitvec_write_field(dest, wp, tfi, 5); // TFI_ASSIGNMENT Temporary Flow Identity |
| 690 | bitvec_write_field(dest, wp, 0, 1); // POLLING |
| 691 | bitvec_write_field(dest, wp, 0, 1); // ALLOCATION_TYPE: dynamic |
| 692 | bitvec_write_field(dest, wp, 1, 3); // USF |
| 693 | bitvec_write_field(dest, wp, 1, 1); // USF_GRANULARITY |
| 694 | bitvec_write_field(dest, wp, 0 , 1); // "0" power control: Not Present |
| 695 | bitvec_write_field(dest, wp, 0, 2); // CHANNEL_CODING_COMMAND |
| 696 | bitvec_write_field(dest, wp, 1, 1); // TLLI_BLOCK_CHANNEL_CODING |
| 697 | bitvec_write_field(dest, wp, 1 , 1); // "1" Alpha : Present |
| 698 | bitvec_write_field(dest, wp, 0, 4); // Alpha |
| 699 | bitvec_write_field(dest, wp, 0, 5); // Gamma |
| 700 | bitvec_write_field(dest, wp, 0, 1); // TIMING_ADVANCE_INDEX_FLAG |
| 701 | bitvec_write_field(dest, wp, 0, 1); // TBF_STARTING_TIME_FLAG |
Ivan Kluchnikov | 5310d45 | 2012-04-17 22:00:31 +0400 | [diff] [blame] | 702 | } |
| 703 | |
| 704 | if (wp%8) |
| 705 | return wp/8+1; |
| 706 | else |
| 707 | return wp/8; |
| 708 | } |
| 709 | |
| 710 | |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 711 | void write_ia_rest_octets_downlink_assignment(bitvec * dest, uint8_t tfi, uint32_t tlli) |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 712 | { |
Ivan Kluchnikov | 5310d45 | 2012-04-17 22:00:31 +0400 | [diff] [blame] | 713 | // GSM 04.08 10.5.2.16 |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 714 | unsigned wp = 0; |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 715 | bitvec_write_field(dest, wp, 3, 2); // "HH" |
| 716 | bitvec_write_field(dest, wp, 1, 2); // "01" Packet Downlink Assignment |
| 717 | bitvec_write_field(dest, wp,tlli,32); // TLLI |
| 718 | bitvec_write_field(dest, wp,0x1,1); // switch TFI : on |
| 719 | bitvec_write_field(dest, wp,tfi,5); // TFI |
| 720 | bitvec_write_field(dest, wp,0x0,1); // RLC acknowledged mode |
| 721 | bitvec_write_field(dest, wp,0x0,1); // ALPHA = present |
| 722 | bitvec_write_field(dest, wp,0x0,5); // GAMMA power control parameter |
| 723 | bitvec_write_field(dest, wp,0x0,1); // Polling Bit |
| 724 | bitvec_write_field(dest, wp,0x1,1); // TA_VALID ??? |
| 725 | bitvec_write_field(dest, wp,0x1,1); // switch TIMING_ADVANCE_INDEX = on |
| 726 | bitvec_write_field(dest, wp,0x0,4); // TIMING_ADVANCE_INDEX |
| 727 | bitvec_write_field(dest, wp,0x0,1); // TBF Starting TIME present |
| 728 | bitvec_write_field(dest, wp,0x0,1); // P0 not present |
| 729 | bitvec_write_field(dest, wp,0x1,1); // P0 not present |
| 730 | bitvec_write_field(dest, wp,0xb,4); |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 731 | } |
| 732 | |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 733 | void write_packet_uplink_ack(bitvec * dest, uint8_t tfi, uint32_t tlli, unsigned cv, unsigned bsn) |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 734 | { |
| 735 | // TODO We should use our implementation of encode RLC/MAC Control messages. |
| 736 | unsigned wp = 0; |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 737 | bitvec_write_field(dest, wp,0x1,2); // payload |
| 738 | bitvec_write_field(dest, wp,0x0,2); // Uplink block with TDMA framenumber |
| 739 | if (cv == 0) bitvec_write_field(dest, wp,0x1,1); // Suppl/Polling Bit |
| 740 | else bitvec_write_field(dest, wp,0x0,1); //Suppl/Polling Bit |
| 741 | bitvec_write_field(dest, wp,0x1,3); // Uplink state flag |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 742 | |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 743 | //bitvec_write_field(dest, wp,0x0,1); // Reduced block sequence number |
| 744 | //bitvec_write_field(dest, wp,BSN+6,5); // Radio transaction identifier |
| 745 | //bitvec_write_field(dest, wp,0x1,1); // Final segment |
| 746 | //bitvec_write_field(dest, wp,0x1,1); // Address control |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 747 | |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 748 | //bitvec_write_field(dest, wp,0x0,2); // Power reduction: 0 |
| 749 | //bitvec_write_field(dest, wp,TFI,5); // Temporary flow identifier |
| 750 | //bitvec_write_field(dest, wp,0x1,1); // Direction |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 751 | |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 752 | bitvec_write_field(dest, wp,0x09,6); // MESSAGE TYPE |
| 753 | bitvec_write_field(dest, wp,0x0,2); // Page Mode |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 754 | |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 755 | bitvec_write_field(dest, wp,0x0,2); |
| 756 | bitvec_write_field(dest, wp,tfi,5); // Uplink TFI |
| 757 | bitvec_write_field(dest, wp,0x0,1); |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 758 | |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 759 | bitvec_write_field(dest, wp,0x0,2); // CS1 |
| 760 | if (cv == 0) bitvec_write_field(dest, wp,0x1,1); // FINAL_ACK_INDICATION |
| 761 | else bitvec_write_field(dest, wp,0x0,1); // FINAL_ACK_INDICATION |
| 762 | bitvec_write_field(dest, wp,bsn + 1,7); // STARTING_SEQUENCE_NUMBER |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 763 | // RECEIVE_BLOCK_BITMAP |
| 764 | for (unsigned i=0; i<8; i++) { |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 765 | bitvec_write_field(dest, wp,0xff,8); |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 766 | } |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 767 | bitvec_write_field(dest, wp,0x1,1); // CONTENTION_RESOLUTION_TLLI = present |
| 768 | bitvec_write_field(dest, wp,tlli,8*4); |
| 769 | bitvec_write_field(dest, wp,0x00,4); //spare |
Ivan Kluchnikov | 0b450c1 | 2012-05-24 22:47:12 +0400 | [diff] [blame] | 770 | bitvec_write_field(dest, wp,0x5,4); //0101 |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 771 | } |
| 772 | |
| 773 | void gprs_rlcmac_tx_ul_ack(uint8_t tfi, uint32_t tlli, RlcMacUplinkDataBlock_t * ul_data_block) |
| 774 | { |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 775 | bitvec *packet_uplink_ack_vec = bitvec_alloc(23); |
| 776 | bitvec_unhex(packet_uplink_ack_vec, "2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b"); |
| 777 | write_packet_uplink_ack(packet_uplink_ack_vec, tfi, tlli, ul_data_block->CV, ul_data_block->BSN); |
Ivan Kluchnikov | a9f1ff2 | 2012-05-24 22:25:06 +0400 | [diff] [blame] | 778 | LOGP(DRLCMAC, LOGL_NOTICE, "TX: [PCU -> BTS] TFI: %u TLLI: 0x%08x Packet Uplink Ack\n", tfi, tlli); |
Ivan Kluchnikov | 192e9c1 | 2012-04-12 15:27:39 +0400 | [diff] [blame] | 779 | RlcMacDownlink_t * packet_uplink_ack = (RlcMacDownlink_t *)malloc(sizeof(RlcMacDownlink_t)); |
Ivan Kluchnikov | a9f1ff2 | 2012-05-24 22:25:06 +0400 | [diff] [blame] | 780 | LOGP(DRLCMAC, LOGL_NOTICE, "+++++++++++++++++++++++++ TX : Packet Uplink Ack +++++++++++++++++++++++++\n"); |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 781 | decode_gsm_rlcmac_downlink(packet_uplink_ack_vec, packet_uplink_ack); |
Ivan Kluchnikov | a9f1ff2 | 2012-05-24 22:25:06 +0400 | [diff] [blame] | 782 | LOGPC(DRLCMAC, LOGL_NOTICE, "\n"); |
| 783 | LOGP(DRLCMAC, LOGL_NOTICE, "------------------------- TX : Packet Uplink Ack -------------------------\n"); |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 784 | free(packet_uplink_ack); |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 785 | pcu_l1if_tx(packet_uplink_ack_vec, GsmL1_Sapi_Pacch); |
| 786 | bitvec_free(packet_uplink_ack_vec); |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 787 | } |
| 788 | |
| 789 | void gprs_rlcmac_data_block_parse(gprs_rlcmac_tbf* tbf, RlcMacUplinkDataBlock_t * ul_data_block) |
| 790 | { |
Ivan Kluchnikov | bceb3fb | 2012-06-05 16:56:27 +0400 | [diff] [blame] | 791 | // 1. Count the number of octets in header and number of LLC PDU in uplink data block. |
| 792 | unsigned data_block_hdr_len = 3; // uplink data block header length: 3 mandatory octets |
| 793 | unsigned llc_pdu_num = 0; // number of LLC PDU in data block |
| 794 | |
| 795 | |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 796 | if (ul_data_block->E_1 == 0) // Extension octet follows immediately |
| 797 | { |
Ivan Kluchnikov | bceb3fb | 2012-06-05 16:56:27 +0400 | [diff] [blame] | 798 | unsigned i = -1; |
| 799 | do |
Ivan Kluchnikov | b2b8100 | 2012-06-04 21:57:02 +0400 | [diff] [blame] | 800 | { |
Ivan Kluchnikov | bceb3fb | 2012-06-05 16:56:27 +0400 | [diff] [blame] | 801 | i++; |
| 802 | data_block_hdr_len += 1; |
| 803 | llc_pdu_num++; |
Ivan Kluchnikov | 2f69acd | 2012-06-12 12:42:16 +0400 | [diff] [blame] | 804 | |
| 805 | // Singular case, TS 44.060 10.4.14 |
| 806 | if (ul_data_block->LENGTH_INDICATOR[i] == 0) |
| 807 | { |
| 808 | break; |
| 809 | } |
| 810 | |
Ivan Kluchnikov | bceb3fb | 2012-06-05 16:56:27 +0400 | [diff] [blame] | 811 | // New LLC PDU starts after the current LLC PDU and continues until |
| 812 | // the end of the RLC information field, no more extension octets. |
| 813 | if ((ul_data_block->M[i] == 1)&&(ul_data_block->E[i] == 1)) |
Ivan Kluchnikov | b2b8100 | 2012-06-04 21:57:02 +0400 | [diff] [blame] | 814 | { |
Ivan Kluchnikov | bceb3fb | 2012-06-05 16:56:27 +0400 | [diff] [blame] | 815 | llc_pdu_num++; |
Ivan Kluchnikov | b2b8100 | 2012-06-04 21:57:02 +0400 | [diff] [blame] | 816 | } |
Ivan Kluchnikov | bceb3fb | 2012-06-05 16:56:27 +0400 | [diff] [blame] | 817 | } while(ul_data_block->E[i] == 0); // there is another extension octet, which delimits the new LLC PDU |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 818 | } |
| 819 | else |
| 820 | { |
Ivan Kluchnikov | bceb3fb | 2012-06-05 16:56:27 +0400 | [diff] [blame] | 821 | llc_pdu_num++; |
| 822 | } |
| 823 | if(ul_data_block->TI == 1) // TLLI field is present |
| 824 | { |
| 825 | tbf->tlli = ul_data_block->TLLI; |
| 826 | data_block_hdr_len += 4; // TLLI length : 4 octets |
| 827 | if (ul_data_block->PI == 1) // PFI is present if TI field indicates presence of TLLI |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 828 | { |
Ivan Kluchnikov | bceb3fb | 2012-06-05 16:56:27 +0400 | [diff] [blame] | 829 | data_block_hdr_len += 1; // PFI length : 1 octet |
| 830 | } |
| 831 | } |
| 832 | |
| 833 | // 2. Extract all LLC PDU from uplink data block and send them to SGSN. |
| 834 | unsigned llc_pdu_len = 0; |
| 835 | unsigned data_octet_num = 0; |
| 836 | |
| 837 | for (unsigned num = 0; num < llc_pdu_num; num ++) |
| 838 | { |
| 839 | if (ul_data_block->E_1 == 0) // Extension octet follows immediately |
| 840 | { |
Ivan Kluchnikov | 2f69acd | 2012-06-12 12:42:16 +0400 | [diff] [blame] | 841 | // Singular case, TS 44.060 10.4.14 |
| 842 | if (ul_data_block->LENGTH_INDICATOR[num] == 0) |
| 843 | { |
| 844 | llc_pdu_len = UL_RLC_DATA_BLOCK_LEN - data_block_hdr_len; |
| 845 | } |
| 846 | else |
| 847 | { |
| 848 | llc_pdu_len = ul_data_block->LENGTH_INDICATOR[num]; |
| 849 | } |
Ivan Kluchnikov | bceb3fb | 2012-06-05 16:56:27 +0400 | [diff] [blame] | 850 | } |
| 851 | else |
| 852 | { |
| 853 | llc_pdu_len = UL_RLC_DATA_BLOCK_LEN - data_block_hdr_len; |
| 854 | } |
| 855 | |
| 856 | for (unsigned i = tbf->data_index; i < tbf->data_index + llc_pdu_len; i++) |
| 857 | { |
| 858 | tbf->rlc_data[i] = ul_data_block->RLC_DATA[data_octet_num]; |
| 859 | data_octet_num++; |
| 860 | } |
| 861 | tbf->data_index += llc_pdu_len; |
| 862 | |
| 863 | if (ul_data_block->E_1 == 0) // Extension octet follows immediately |
| 864 | { |
| 865 | // New LLC PDU starts after the current LLC PDU |
| 866 | if (ul_data_block->M[num] == 1) |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 867 | { |
Ivan Kluchnikov | bceb3fb | 2012-06-05 16:56:27 +0400 | [diff] [blame] | 868 | gprs_rlcmac_tx_ul_ud(tbf); |
| 869 | tbf->data_index = 0; |
| 870 | // New LLC PDU continues until the end of the RLC information field, no more extension octets. |
| 871 | if ((ul_data_block->E[num] == 1)) |
| 872 | { |
| 873 | llc_pdu_len = UL_RLC_DATA_BLOCK_LEN - data_block_hdr_len - data_octet_num; |
| 874 | for (unsigned i = tbf->data_index; i < tbf->data_index + llc_pdu_len; i++) |
| 875 | { |
| 876 | tbf->rlc_data[i] = ul_data_block->RLC_DATA[data_octet_num]; |
| 877 | data_octet_num++; |
| 878 | } |
| 879 | tbf->data_index += llc_pdu_len; |
| 880 | num++; |
| 881 | } |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 882 | } |
| 883 | } |
| 884 | } |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 885 | } |
| 886 | |
| 887 | /* Received Uplink RLC data block. */ |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 888 | int gprs_rlcmac_rcv_data_block(bitvec *rlc_block) |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 889 | { |
| 890 | struct gprs_rlcmac_tbf *tbf; |
Ivan Kluchnikov | a9e6dc5 | 2012-06-17 08:30:06 +0400 | [diff] [blame^] | 891 | int rc = 0; |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 892 | |
Ivan Kluchnikov | a9f1ff2 | 2012-05-24 22:25:06 +0400 | [diff] [blame] | 893 | LOGP(DRLCMAC, LOGL_NOTICE, "RX: [PCU <- BTS] Uplink Data Block\n"); |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 894 | RlcMacUplinkDataBlock_t * ul_data_block = (RlcMacUplinkDataBlock_t *)malloc(sizeof(RlcMacUplinkDataBlock_t)); |
Ivan Kluchnikov | a9f1ff2 | 2012-05-24 22:25:06 +0400 | [diff] [blame] | 895 | LOGP(DRLCMAC, LOGL_NOTICE, "+++++++++++++++++++++++++ RX : Uplink Data Block +++++++++++++++++++++++++\n"); |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 896 | decode_gsm_rlcmac_uplink_data(rlc_block, ul_data_block); |
Ivan Kluchnikov | a9f1ff2 | 2012-05-24 22:25:06 +0400 | [diff] [blame] | 897 | LOGP(DRLCMAC, LOGL_NOTICE, "------------------------- RX : Uplink Data Block -------------------------\n"); |
Ivan Kluchnikov | a9e6dc5 | 2012-06-17 08:30:06 +0400 | [diff] [blame^] | 898 | |
| 899 | tbf = tbf_by_tfi(ul_data_block->TFI, GPRS_RLCMAC_UL_TBF); |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 900 | if (!tbf) { |
Ivan Kluchnikov | a9e6dc5 | 2012-06-17 08:30:06 +0400 | [diff] [blame^] | 901 | return -1; |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 902 | } |
Ivan Kluchnikov | a9e6dc5 | 2012-06-17 08:30:06 +0400 | [diff] [blame^] | 903 | |
| 904 | rc = tbf_ul_data_transfer(tbf, ul_data_block); |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 905 | free(ul_data_block); |
Ivan Kluchnikov | a9e6dc5 | 2012-06-17 08:30:06 +0400 | [diff] [blame^] | 906 | return rc; |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 907 | } |
| 908 | |
| 909 | /* Received Uplink RLC control block. */ |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 910 | int gprs_rlcmac_rcv_control_block(bitvec *rlc_block) |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 911 | { |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 912 | uint8_t tfi = 0; |
| 913 | uint32_t tlli = 0; |
| 914 | struct gprs_rlcmac_tbf *tbf; |
| 915 | |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 916 | RlcMacUplink_t * ul_control_block = (RlcMacUplink_t *)malloc(sizeof(RlcMacUplink_t)); |
Ivan Kluchnikov | a9f1ff2 | 2012-05-24 22:25:06 +0400 | [diff] [blame] | 917 | LOGP(DRLCMAC, LOGL_NOTICE, "+++++++++++++++++++++++++ RX : Uplink Control Block +++++++++++++++++++++++++\n"); |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 918 | decode_gsm_rlcmac_uplink(rlc_block, ul_control_block); |
Ivan Kluchnikov | a9f1ff2 | 2012-05-24 22:25:06 +0400 | [diff] [blame] | 919 | LOGPC(DRLCMAC, LOGL_NOTICE, "\n"); |
| 920 | LOGP(DRLCMAC, LOGL_NOTICE, "------------------------- RX : Uplink Control Block -------------------------\n"); |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 921 | switch (ul_control_block->u.MESSAGE_TYPE) { |
| 922 | case MT_PACKET_CONTROL_ACK: |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 923 | tlli = ul_control_block->u.Packet_Control_Acknowledgement.TLLI; |
Ivan Kluchnikov | a9e6dc5 | 2012-06-17 08:30:06 +0400 | [diff] [blame^] | 924 | tbf = tbf_by_tlli(tlli, GPRS_RLCMAC_UL_TBF); |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 925 | if (!tbf) { |
| 926 | return 0; |
| 927 | } |
Ivan Kluchnikov | 9c795ab | 2012-05-24 23:12:59 +0400 | [diff] [blame] | 928 | LOGP(DRLCMAC, LOGL_NOTICE, "RX: [PCU <- BTS] TFI: %u TLLI: 0x%08x Packet Control Ack\n", tbf->tfi, tbf->tlli); |
Ivan Kluchnikov | a9e6dc5 | 2012-06-17 08:30:06 +0400 | [diff] [blame^] | 929 | tbf_ul_release(tbf); |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 930 | break; |
| 931 | case MT_PACKET_DOWNLINK_ACK_NACK: |
| 932 | tfi = ul_control_block->u.Packet_Downlink_Ack_Nack.DOWNLINK_TFI; |
Ivan Kluchnikov | a9e6dc5 | 2012-06-17 08:30:06 +0400 | [diff] [blame^] | 933 | tbf = tbf_by_tfi(tfi, GPRS_RLCMAC_DL_TBF); |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 934 | if (!tbf) { |
| 935 | return 0; |
| 936 | } |
Ivan Kluchnikov | 9c795ab | 2012-05-24 23:12:59 +0400 | [diff] [blame] | 937 | LOGP(DRLCMAC, LOGL_NOTICE, "RX: [PCU <- BTS] TFI: %u TLLI: 0x%08x Packet Downlink Ack/Nack\n", tbf->tfi, tbf->tlli); |
Ivan Kluchnikov | a9e6dc5 | 2012-06-17 08:30:06 +0400 | [diff] [blame^] | 938 | tbf_dl_release(tbf); |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 939 | break; |
| 940 | } |
| 941 | free(ul_control_block); |
| 942 | return 1; |
| 943 | } |
| 944 | |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 945 | void gprs_rlcmac_rcv_block(bitvec *rlc_block) |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 946 | { |
| 947 | unsigned readIndex = 0; |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 948 | unsigned payload = bitvec_read_field(rlc_block, readIndex, 2); |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 949 | |
| 950 | switch (payload) { |
| 951 | case GPRS_RLCMAC_DATA_BLOCK: |
| 952 | gprs_rlcmac_rcv_data_block(rlc_block); |
| 953 | break; |
| 954 | case GPRS_RLCMAC_CONTROL_BLOCK: |
| 955 | gprs_rlcmac_rcv_control_block(rlc_block); |
| 956 | break; |
| 957 | case GPRS_RLCMAC_CONTROL_BLOCK_OPT: |
Ivan Kluchnikov | 856221f | 2012-06-15 09:31:29 +0400 | [diff] [blame] | 958 | LOGP(DRLCMAC, LOGL_NOTICE, "GPRS_RLCMAC_CONTROL_BLOCK_OPT block payload is not supported.\n"); |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 959 | default: |
Ivan Kluchnikov | 856221f | 2012-06-15 09:31:29 +0400 | [diff] [blame] | 960 | LOGP(DRLCMAC, LOGL_NOTICE, "Unknown RLCMAC block payload.\n"); |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 961 | } |
| 962 | } |
| 963 | |
Ivan Kluchnikov | 5310d45 | 2012-04-17 22:00:31 +0400 | [diff] [blame] | 964 | int gprs_rlcmac_rcv_rach(uint8_t ra, uint32_t Fn, uint16_t ta) |
| 965 | { |
| 966 | struct gprs_rlcmac_tbf *tbf; |
| 967 | |
Ivan Kluchnikov | a9e6dc5 | 2012-06-17 08:30:06 +0400 | [diff] [blame^] | 968 | static uint8_t prev_ra = 0; |
| 969 | |
| 970 | if (prev_ra == ra) |
| 971 | { |
| 972 | return -1; |
Ivan Kluchnikov | 5310d45 | 2012-04-17 22:00:31 +0400 | [diff] [blame] | 973 | } |
Ivan Kluchnikov | a9e6dc5 | 2012-06-17 08:30:06 +0400 | [diff] [blame^] | 974 | |
| 975 | tbf = tbf_alloc(GPRS_RLCMAC_UL_TBF); |
| 976 | |
| 977 | return tbf_ul_establish(tbf, ra, Fn, ta); |
Ivan Kluchnikov | 5310d45 | 2012-04-17 22:00:31 +0400 | [diff] [blame] | 978 | } |
| 979 | |
Ivan Kluchnikov | a9e6dc5 | 2012-06-17 08:30:06 +0400 | [diff] [blame^] | 980 | int gprs_rlcmac_tx_llc_pdus(struct gprs_rlcmac_tbf *tbf) |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 981 | { |
| 982 | int fbi = 0; |
Ivan Kluchnikov | e359423 | 2012-06-07 01:12:29 +0400 | [diff] [blame] | 983 | int bsn = 0; |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 984 | |
Ivan Kluchnikov | e359423 | 2012-06-07 01:12:29 +0400 | [diff] [blame] | 985 | |
Ivan Kluchnikov | a9e6dc5 | 2012-06-17 08:30:06 +0400 | [diff] [blame^] | 986 | if (tbf->llc_pdu_list_len == 0) |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 987 | { |
Ivan Kluchnikov | a9e6dc5 | 2012-06-17 08:30:06 +0400 | [diff] [blame^] | 988 | return -1; |
Ivan Kluchnikov | e359423 | 2012-06-07 01:12:29 +0400 | [diff] [blame] | 989 | } |
Ivan Kluchnikov | a9e6dc5 | 2012-06-17 08:30:06 +0400 | [diff] [blame^] | 990 | |
| 991 | bitvec *data_block_vector = bitvec_alloc(BLOCK_LEN); |
| 992 | bitvec_unhex(data_block_vector, "2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b"); |
| 993 | RlcMacDownlinkDataBlock_t * data_block = (RlcMacDownlinkDataBlock_t *)malloc(sizeof(RlcMacDownlinkDataBlock_t)); |
| 994 | |
| 995 | struct tbf_llc_pdu *llc_pdu; |
| 996 | |
| 997 | int data_block_ready = 0; |
| 998 | unsigned data_oct_num = 0; |
| 999 | int llc_pdu_index; |
| 1000 | for (unsigned i = 0; i < tbf->llc_pdu_list_len; i++) |
Ivan Kluchnikov | e359423 | 2012-06-07 01:12:29 +0400 | [diff] [blame] | 1001 | { |
Ivan Kluchnikov | a9e6dc5 | 2012-06-17 08:30:06 +0400 | [diff] [blame^] | 1002 | llc_pdu = tbf_llc_pdu_by_num(tbf->llc_pdus, i); |
| 1003 | if (!llc_pdu) |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 1004 | { |
Ivan Kluchnikov | a9e6dc5 | 2012-06-17 08:30:06 +0400 | [diff] [blame^] | 1005 | return -1; |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 1006 | } |
Ivan Kluchnikov | e359423 | 2012-06-07 01:12:29 +0400 | [diff] [blame] | 1007 | |
Ivan Kluchnikov | a9e6dc5 | 2012-06-17 08:30:06 +0400 | [diff] [blame^] | 1008 | llc_pdu_index = 0; |
Ivan Kluchnikov | e359423 | 2012-06-07 01:12:29 +0400 | [diff] [blame] | 1009 | |
Ivan Kluchnikov | a9e6dc5 | 2012-06-17 08:30:06 +0400 | [diff] [blame^] | 1010 | do |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 1011 | { |
Ivan Kluchnikov | a9e6dc5 | 2012-06-17 08:30:06 +0400 | [diff] [blame^] | 1012 | data_block->PAYLOAD_TYPE = 0; |
| 1013 | data_block->RRBP = 0; |
| 1014 | data_block->SP = 1; |
| 1015 | data_block->USF = 1; |
| 1016 | data_block->PR = 0; |
| 1017 | data_block->TFI = tbf->tfi; |
| 1018 | data_block->BSN = bsn; |
| 1019 | |
| 1020 | // Write LLC PDU to Data Block |
| 1021 | int j; |
| 1022 | for(j = llc_pdu_index; j < llc_pdu->len; j++) |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 1023 | { |
Ivan Kluchnikov | a9e6dc5 | 2012-06-17 08:30:06 +0400 | [diff] [blame^] | 1024 | data_block->RLC_DATA[data_oct_num] = llc_pdu->data[j]; |
| 1025 | data_oct_num++; |
| 1026 | llc_pdu_index++; |
| 1027 | // RLC data field is completely filled. |
| 1028 | if (data_oct_num == BLOCK_LEN - 3) |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 1029 | { |
Ivan Kluchnikov | a9e6dc5 | 2012-06-17 08:30:06 +0400 | [diff] [blame^] | 1030 | fbi = 0; |
| 1031 | data_block->E_1 = 1; |
| 1032 | data_block_ready = 1; |
| 1033 | break; |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 1034 | } |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 1035 | } |
Ivan Kluchnikov | a9e6dc5 | 2012-06-17 08:30:06 +0400 | [diff] [blame^] | 1036 | if(!data_block_ready) |
| 1037 | { |
| 1038 | data_block->E_1 = 0; |
| 1039 | data_block->LENGTH_INDICATOR[0] = data_oct_num; |
| 1040 | if ((i+1) == tbf->llc_pdu_list_len) |
| 1041 | { |
| 1042 | // Current LLC PDU is last in TBF. |
| 1043 | data_block->M[0] = 0; |
| 1044 | data_block->E[0] = 1; |
| 1045 | fbi = 1; |
| 1046 | for(unsigned k = data_oct_num; k < BLOCK_LEN - 4; k++) |
| 1047 | { |
| 1048 | data_block->RLC_DATA[k] = 0x2b; |
| 1049 | } |
| 1050 | data_block_ready = 1; |
| 1051 | } |
| 1052 | else |
| 1053 | { |
| 1054 | // More LLC PDUs should be transmited in this TBF. |
| 1055 | data_block->M[0] = 1; |
| 1056 | data_block->E[0] = 1; |
| 1057 | data_block_ready = 1; |
| 1058 | break; |
| 1059 | } |
| 1060 | } |
| 1061 | |
| 1062 | data_block->FBI = fbi; |
| 1063 | |
| 1064 | if(data_block_ready) |
| 1065 | { |
| 1066 | LOGP(DRLCMAC, LOGL_NOTICE, "TX: [PCU -> BTS] Downlink Data Block\n"); |
| 1067 | LOGP(DRLCMAC, LOGL_NOTICE, "+++++++++++++++++++++++++ TX : Downlink Data Block +++++++++++++++++++++++++\n"); |
| 1068 | encode_gsm_rlcmac_downlink_data(data_block_vector, data_block); |
| 1069 | LOGP(DRLCMAC, LOGL_NOTICE, "------------------------- TX : Downlink Data Block -------------------------\n"); |
| 1070 | pcu_l1if_tx(data_block_vector, GsmL1_Sapi_Pdtch); |
| 1071 | bitvec_unhex(data_block_vector, "2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b"); |
| 1072 | bsn++; |
| 1073 | data_block_ready = 0; |
| 1074 | data_oct_num = 0; |
| 1075 | } |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 1076 | } |
Ivan Kluchnikov | a9e6dc5 | 2012-06-17 08:30:06 +0400 | [diff] [blame^] | 1077 | while(llc_pdu->len != llc_pdu_index); |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 1078 | } |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 1079 | } |
| 1080 | |
| 1081 | /* Send Uplink unit-data to SGSN. */ |
| 1082 | void gprs_rlcmac_tx_ul_ud(gprs_rlcmac_tbf *tbf) |
| 1083 | { |
| 1084 | const uint8_t qos_profile = QOS_PROFILE; |
| 1085 | struct msgb *llc_pdu; |
| 1086 | unsigned msg_len = NS_HDR_LEN + BSSGP_HDR_LEN + tbf->data_index; |
| 1087 | |
Ivan Kluchnikov | b2b8100 | 2012-06-04 21:57:02 +0400 | [diff] [blame] | 1088 | LOGP(DBSSGP, LOGL_NOTICE, "TX: [PCU -> SGSN ] TFI: %u TLLI: 0x%08x DataLen: %u", tbf->tfi, tbf->tlli, tbf->data_index); |
| 1089 | //LOGP(DBSSGP, LOGL_NOTICE, " Data = "); |
| 1090 | //for (unsigned i = 0; i < tbf->data_index; i++) |
| 1091 | // LOGPC(DBSSGP, LOGL_NOTICE, "%02x ", tbf->rlc_data[i]); |
Ivan Kluchnikov | c320d86 | 2012-03-18 15:04:48 +0400 | [diff] [blame] | 1092 | |
| 1093 | bctx->cell_id = CELL_ID; |
| 1094 | bctx->nsei = NSEI; |
| 1095 | bctx->ra_id.mnc = MNC; |
| 1096 | bctx->ra_id.mcc = MCC; |
| 1097 | bctx->ra_id.lac = PCU_LAC; |
| 1098 | bctx->ra_id.rac = PCU_RAC; |
| 1099 | bctx->bvci = BVCI; |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 1100 | |
| 1101 | llc_pdu = msgb_alloc_headroom(msg_len, msg_len,"llc_pdu"); |
| 1102 | msgb_tvlv_push(llc_pdu, BSSGP_IE_LLC_PDU, sizeof(uint8_t)*tbf->data_index, tbf->rlc_data); |
| 1103 | bssgp_tx_ul_ud(bctx, tbf->tlli, &qos_profile, llc_pdu); |
| 1104 | } |
| 1105 | |
Ivan Kluchnikov | c320d86 | 2012-03-18 15:04:48 +0400 | [diff] [blame] | 1106 | void gprs_rlcmac_downlink_assignment(gprs_rlcmac_tbf *tbf) |
| 1107 | { |
Ivan Kluchnikov | a9f1ff2 | 2012-05-24 22:25:06 +0400 | [diff] [blame] | 1108 | LOGP(DRLCMAC, LOGL_NOTICE, "TX: [PCU -> BTS] TFI: %u TLLI: 0x%08x Immidiate Assignment (CCCH)\n", tbf->tfi, tbf->tlli); |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 1109 | bitvec *immediate_assignment = bitvec_alloc(23); |
| 1110 | bitvec_unhex(immediate_assignment, "2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b"); |
| 1111 | int len = write_immediate_assignment(immediate_assignment, 1, 125, get_current_fn(), (l1fh->fl1h)->channel_info.ta, tbf->tfi, tbf->tlli); |
| 1112 | pcu_l1if_tx(immediate_assignment, GsmL1_Sapi_Agch, len); |
| 1113 | bitvec_free(immediate_assignment); |
Ivan Kluchnikov | c320d86 | 2012-03-18 15:04:48 +0400 | [diff] [blame] | 1114 | } |
Ivan Kluchnikov | 9c795ab | 2012-05-24 23:12:59 +0400 | [diff] [blame] | 1115 | |
| 1116 | void gprs_rlcmac_packet_downlink_assignment(gprs_rlcmac_tbf *tbf) |
| 1117 | { |
| 1118 | LOGP(DRLCMAC, LOGL_NOTICE, "TX: [PCU -> BTS] TFI: %u TLLI: 0x%08x Packet DL Assignment\n", tbf->tfi, tbf->tlli); |
| 1119 | bitvec *packet_downlink_assignment_vec = bitvec_alloc(23); |
| 1120 | bitvec_unhex(packet_downlink_assignment_vec, "2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b"); |
| 1121 | write_packet_downlink_assignment(packet_downlink_assignment_vec, tbf->tfi, tbf->tlli, (l1fh->fl1h)->channel_info.tn, |
| 1122 | (l1fh->fl1h)->channel_info.ta, (l1fh->fl1h)->channel_info.tsc); |
| 1123 | RlcMacDownlink_t * packet_downlink_assignment = (RlcMacDownlink_t *)malloc(sizeof(RlcMacDownlink_t)); |
| 1124 | LOGP(DRLCMAC, LOGL_NOTICE, "+++++++++++++++++++++++++ TX : Packet Downlink Assignment +++++++++++++++++++++++++\n"); |
| 1125 | decode_gsm_rlcmac_downlink(packet_downlink_assignment_vec, packet_downlink_assignment); |
| 1126 | LOGPC(DRLCMAC, LOGL_NOTICE, "\n"); |
| 1127 | LOGP(DRLCMAC, LOGL_NOTICE, "------------------------- TX : Packet Downlink Assignment -------------------------\n"); |
| 1128 | free(packet_downlink_assignment); |
| 1129 | pcu_l1if_tx(packet_downlink_assignment_vec, GsmL1_Sapi_Pacch); |
| 1130 | bitvec_free(packet_downlink_assignment_vec); |
Ivan Kluchnikov | 9c795ab | 2012-05-24 23:12:59 +0400 | [diff] [blame] | 1131 | } |