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; |
Andreas Eversberg | 0aed654 | 2012-06-23 10:33:16 +0200 | [diff] [blame^] | 27 | LLIST_HEAD(block_queue); |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 28 | |
| 29 | int tfi_alloc() |
| 30 | { |
| 31 | struct gprs_rlcmac_tbf *tbf; |
| 32 | uint32_t tfi_map = 0; |
| 33 | uint32_t tfi_ind = 0; |
| 34 | uint32_t mask = 1; |
| 35 | uint8_t i; |
| 36 | |
| 37 | llist_for_each_entry(tbf, &gprs_rlcmac_tbfs, list) { |
| 38 | tfi_ind = 1 << tbf->tfi; |
| 39 | tfi_map = tfi_map|tfi_ind; |
| 40 | } |
| 41 | |
| 42 | for (i = 0; i < 32; i++) { |
| 43 | if(((tfi_map >> i) & mask) == 0) { |
| 44 | return i; |
| 45 | } |
| 46 | } |
| 47 | return -1; |
| 48 | } |
| 49 | |
| 50 | /* lookup TBF Entity (by TFI) */ |
Andreas Eversberg | 0aed654 | 2012-06-23 10:33:16 +0200 | [diff] [blame^] | 51 | struct gprs_rlcmac_tbf *tbf_by_tfi(uint8_t tfi) |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 52 | { |
| 53 | struct gprs_rlcmac_tbf *tbf; |
| 54 | |
| 55 | llist_for_each_entry(tbf, &gprs_rlcmac_tbfs, list) { |
| 56 | if (tbf->tfi == tfi) |
| 57 | return tbf; |
| 58 | } |
| 59 | return NULL; |
| 60 | } |
| 61 | |
Andreas Eversberg | 0aed654 | 2012-06-23 10:33:16 +0200 | [diff] [blame^] | 62 | struct gprs_rlcmac_tbf *tbf_by_tlli(uint32_t tlli) |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 63 | { |
| 64 | struct gprs_rlcmac_tbf *tbf; |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 65 | llist_for_each_entry(tbf, &gprs_rlcmac_tbfs, list) { |
| 66 | if ((tbf->tlli == tlli)&&(tbf->direction == GPRS_RLCMAC_UL_TBF)) |
| 67 | return tbf; |
| 68 | } |
| 69 | return NULL; |
| 70 | } |
| 71 | |
Andreas Eversberg | 0aed654 | 2012-06-23 10:33:16 +0200 | [diff] [blame^] | 72 | struct gprs_rlcmac_tbf *tbf_alloc(uint8_t tfi, uint8_t trx, uint8_t ts) |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 73 | { |
| 74 | struct gprs_rlcmac_tbf *tbf; |
| 75 | |
| 76 | tbf = talloc_zero(rlcmac_tall_ctx, struct gprs_rlcmac_tbf); |
| 77 | if (!tbf) |
| 78 | return NULL; |
| 79 | |
| 80 | tbf->tfi = tfi; |
Andreas Eversberg | 0aed654 | 2012-06-23 10:33:16 +0200 | [diff] [blame^] | 81 | tbf->trx = trx; |
| 82 | tbf->ts = ts; |
| 83 | tbf->arfcn = pcu_l1if_bts.trx[trx].arfcn; |
| 84 | tbf->tsc = pcu_l1if_bts.trx[trx].ts[ts].tsc; |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 85 | llist_add(&tbf->list, &gprs_rlcmac_tbfs); |
| 86 | |
| 87 | return tbf; |
| 88 | } |
| 89 | |
Andreas Eversberg | 0aed654 | 2012-06-23 10:33:16 +0200 | [diff] [blame^] | 90 | void tbf_free(struct gprs_rlcmac_tbf *tbf) |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 91 | { |
| 92 | llist_del(&tbf->list); |
| 93 | talloc_free(tbf); |
| 94 | } |
| 95 | |
Ivan Kluchnikov | 61a33f7 | 2012-04-12 15:22:06 +0400 | [diff] [blame] | 96 | |
| 97 | static void tbf_timer_cb(void *_tbf) |
| 98 | { |
| 99 | struct gprs_rlcmac_tbf *tbf = (struct gprs_rlcmac_tbf *)_tbf; |
| 100 | |
| 101 | tbf->num_T_exp++; |
| 102 | |
| 103 | switch (tbf->T) { |
| 104 | case 1111: |
| 105 | // TODO: We should add timers for TBF. |
| 106 | break; |
| 107 | default: |
Ivan Kluchnikov | 856221f | 2012-06-15 09:31:29 +0400 | [diff] [blame] | 108 | 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] | 109 | } |
| 110 | } |
| 111 | |
| 112 | static void tbf_timer_start(struct gprs_rlcmac_tbf *tbf, unsigned int T, |
| 113 | unsigned int seconds) |
| 114 | { |
| 115 | if (osmo_timer_pending(&tbf->timer)) |
Ivan Kluchnikov | 856221f | 2012-06-15 09:31:29 +0400 | [diff] [blame] | 116 | LOGP(DRLCMAC, LOGL_NOTICE, "Starting TBF timer %u while old timer %u pending \n", T, tbf->T); |
| 117 | |
Ivan Kluchnikov | 61a33f7 | 2012-04-12 15:22:06 +0400 | [diff] [blame] | 118 | tbf->T = T; |
| 119 | tbf->num_T_exp = 0; |
| 120 | |
| 121 | /* FIXME: we should do this only once ? */ |
| 122 | tbf->timer.data = tbf; |
| 123 | tbf->timer.cb = &tbf_timer_cb; |
| 124 | |
| 125 | osmo_timer_schedule(&tbf->timer, seconds, 0); |
| 126 | } |
| 127 | |
| 128 | |
| 129 | static void tbf_gsm_timer_cb(void *_tbf) |
| 130 | { |
| 131 | struct gprs_rlcmac_tbf *tbf = (struct gprs_rlcmac_tbf *)_tbf; |
| 132 | |
| 133 | tbf->num_fT_exp++; |
| 134 | |
| 135 | switch (tbf->fT) { |
| 136 | case 0: |
| 137 | // This is timer for delay RLC/MAC data sending after Downlink Immediate Assignment on CCCH. |
| 138 | gprs_rlcmac_segment_llc_pdu(tbf); |
Ivan Kluchnikov | a9f1ff2 | 2012-05-24 22:25:06 +0400 | [diff] [blame] | 139 | LOGP(DRLCMAC, LOGL_NOTICE, "TBF: [DOWNLINK] END TFI: %u TLLI: 0x%08x \n", tbf->tfi, tbf->tlli); |
Ivan Kluchnikov | 9c795ab | 2012-05-24 23:12:59 +0400 | [diff] [blame] | 140 | tbf_free(tbf); |
Ivan Kluchnikov | 61a33f7 | 2012-04-12 15:22:06 +0400 | [diff] [blame] | 141 | break; |
| 142 | default: |
Ivan Kluchnikov | 856221f | 2012-06-15 09:31:29 +0400 | [diff] [blame] | 143 | 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] | 144 | } |
| 145 | } |
| 146 | |
| 147 | static void tbf_gsm_timer_start(struct gprs_rlcmac_tbf *tbf, unsigned int fT, |
| 148 | int frames) |
| 149 | { |
| 150 | if (osmo_gsm_timer_pending(&tbf->gsm_timer)) |
Ivan Kluchnikov | 856221f | 2012-06-15 09:31:29 +0400 | [diff] [blame] | 151 | 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] | 152 | tbf->fT = fT; |
| 153 | tbf->num_fT_exp = 0; |
| 154 | |
| 155 | /* FIXME: we should do this only once ? */ |
| 156 | tbf->gsm_timer.data = tbf; |
| 157 | tbf->gsm_timer.cb = &tbf_gsm_timer_cb; |
| 158 | |
| 159 | osmo_gsm_timer_schedule(&tbf->gsm_timer, frames); |
| 160 | } |
| 161 | |
Andreas Eversberg | 0aed654 | 2012-06-23 10:33:16 +0200 | [diff] [blame^] | 162 | static void gprs_rlcmac_enqueue_block(bitvec *block, int len) |
| 163 | { |
| 164 | struct msgb *msg = msgb_alloc(len, "rlcmac_dl"); |
| 165 | bitvec_pack(block, msgb_put(msg, len)); |
| 166 | msgb_enqueue(&block_queue, msg); |
| 167 | } |
| 168 | |
Ivan Kluchnikov | 0b450c1 | 2012-05-24 22:47:12 +0400 | [diff] [blame] | 169 | 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] | 170 | { |
| 171 | // TODO We should use our implementation of encode RLC/MAC Control messages. |
| 172 | unsigned wp = 0; |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 173 | bitvec_write_field(dest, wp,0x1,2); // Payload Type |
| 174 | bitvec_write_field(dest, wp,0x0,2); // Uplink block with TDMA framenumber |
| 175 | bitvec_write_field(dest, wp,0x1,1); // Suppl/Polling Bit |
| 176 | bitvec_write_field(dest, wp,0x1,3); // Uplink state flag |
| 177 | bitvec_write_field(dest, wp,0x2,6); // MESSAGE TYPE |
| 178 | bitvec_write_field(dest, wp,0x0,2); // Page Mode |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 179 | |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 180 | bitvec_write_field(dest, wp,0x0,1); // switch PERSIST_LEVEL: off |
Ivan Kluchnikov | 0b450c1 | 2012-05-24 22:47:12 +0400 | [diff] [blame] | 181 | bitvec_write_field(dest, wp,0x0,1); // switch TFI : on |
| 182 | bitvec_write_field(dest, wp,0x0,1); // switch UPLINK TFI : on |
| 183 | bitvec_write_field(dest, wp,tfi-1,5); // TFI |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 184 | |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 185 | bitvec_write_field(dest, wp,0x0,1); // Message escape |
| 186 | bitvec_write_field(dest, wp,0x0,2); // Medium Access Method: Dynamic Allocation |
| 187 | bitvec_write_field(dest, wp,0x0,1); // RLC acknowledged mode |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 188 | |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 189 | bitvec_write_field(dest, wp,0x0,1); // the network establishes no new downlink TBF for the mobile station |
| 190 | bitvec_write_field(dest, wp,0x1,8); // timeslot 7 |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 191 | |
Ivan Kluchnikov | 0b450c1 | 2012-05-24 22:47:12 +0400 | [diff] [blame] | 192 | bitvec_write_field(dest, wp,0x1,1); // switch TIMING_ADVANCE_VALUE = on |
| 193 | bitvec_write_field(dest, wp,ta,6); // TIMING_ADVANCE_VALUE |
| 194 | bitvec_write_field(dest, wp,0x0,1); // switch TIMING_ADVANCE_INDEX = off |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 195 | |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 196 | bitvec_write_field(dest, wp,0x0,1); // switch POWER CONTROL = off |
| 197 | bitvec_write_field(dest, wp,0x1,1); // Frequency Parameters information elements = present |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 198 | |
Ivan Kluchnikov | 0b450c1 | 2012-05-24 22:47:12 +0400 | [diff] [blame] | 199 | bitvec_write_field(dest, wp,tsc,3); // Training Sequence Code (TSC) = 2 |
| 200 | bitvec_write_field(dest, wp,0x0,2); // ARFCN = present |
| 201 | bitvec_write_field(dest, wp,599,10); // ARFCN |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 202 | |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 203 | bitvec_write_field(dest, wp,0x1,1); // switch TFI : on |
| 204 | bitvec_write_field(dest, wp,tfi,5);// TFI |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 205 | |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 206 | bitvec_write_field(dest, wp,0x1,1); // Power Control Parameters IE = present |
| 207 | bitvec_write_field(dest, wp,0x0,4); // ALPHA power control parameter |
| 208 | bitvec_write_field(dest, wp,0x0,1); // switch GAMMA_TN0 = off |
| 209 | bitvec_write_field(dest, wp,0x0,1); // switch GAMMA_TN1 = off |
| 210 | bitvec_write_field(dest, wp,0x0,1); // switch GAMMA_TN2 = off |
| 211 | bitvec_write_field(dest, wp,0x0,1); // switch GAMMA_TN3 = off |
| 212 | bitvec_write_field(dest, wp,0x0,1); // switch GAMMA_TN4 = off |
| 213 | bitvec_write_field(dest, wp,0x0,1); // switch GAMMA_TN5 = off |
| 214 | bitvec_write_field(dest, wp,0x0,1); // switch GAMMA_TN6 = off |
| 215 | bitvec_write_field(dest, wp,0x1,1); // switch GAMMA_TN7 = on |
| 216 | bitvec_write_field(dest, wp,0x0,5); // GAMMA_TN7 |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 217 | |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 218 | bitvec_write_field(dest, wp,0x0,1); // TBF Starting TIME IE not present |
| 219 | bitvec_write_field(dest, wp,0x0,1); // Measurement Mapping struct not present |
Ivan Kluchnikov | 0b450c1 | 2012-05-24 22:47:12 +0400 | [diff] [blame] | 220 | bitvec_write_field(dest, wp,0x0,1); |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 221 | } |
| 222 | |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 223 | 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] | 224 | { |
| 225 | // TODO We should use our implementation of encode RLC/MAC Control messages. |
| 226 | unsigned wp = 0; |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 227 | bitvec_write_field(dest, wp,0x1,2); // Payload Type |
| 228 | bitvec_write_field(dest, wp,0x0,2); // Uplink block with TDMA framenumber |
| 229 | bitvec_write_field(dest, wp,0x1,1); // Suppl/Polling Bit |
| 230 | bitvec_write_field(dest, wp,0x1,3); // Uplink state flag |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 231 | |
| 232 | |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 233 | bitvec_write_field(dest, wp,0xa,6); // MESSAGE TYPE |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 234 | |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 235 | bitvec_write_field(dest, wp,0x0,2); // Page Mode |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 236 | |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 237 | bitvec_write_field(dest, wp,0x0,1); // switch PERSIST_LEVEL: off |
| 238 | bitvec_write_field(dest, wp,0x2,2); // switch TLLI : on |
| 239 | bitvec_write_field(dest, wp,tlli,32); // TLLI |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 240 | |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 241 | bitvec_write_field(dest, wp,0x0,1); // Message escape |
| 242 | bitvec_write_field(dest, wp,0x0,2); // CHANNEL_CODING_COMMAND |
| 243 | bitvec_write_field(dest, wp,0x0,1); // TLLI_BLOCK_CHANNEL_CODING |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 244 | |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 245 | bitvec_write_field(dest, wp,0x1,1); // switch TIMING_ADVANCE_VALUE = on |
| 246 | bitvec_write_field(dest, wp,0x0,6); // TIMING_ADVANCE_VALUE |
| 247 | bitvec_write_field(dest, wp,0x0,1); // switch TIMING_ADVANCE_INDEX = off |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 248 | |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 249 | bitvec_write_field(dest, wp,0x0,1); // Frequency Parameters = off |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 250 | |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 251 | bitvec_write_field(dest, wp,0x1,2); // Dynamic Allocation = off |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 252 | |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 253 | bitvec_write_field(dest, wp,0x0,1); // Dynamic Allocation |
| 254 | bitvec_write_field(dest, wp,0x0,1); // P0 = off |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 255 | |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 256 | bitvec_write_field(dest, wp,0x1,1); // USF_GRANULARITY |
| 257 | bitvec_write_field(dest, wp,0x1,1); // switch TFI : on |
| 258 | bitvec_write_field(dest, wp,tfi,5);// TFI |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 259 | |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 260 | bitvec_write_field(dest, wp,0x0,1); // |
| 261 | bitvec_write_field(dest, wp,0x0,1); // TBF Starting Time = off |
| 262 | bitvec_write_field(dest, wp,0x0,1); // Timeslot Allocation |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 263 | |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 264 | bitvec_write_field(dest, wp,0x0,5); // USF_TN 0 - 4 |
| 265 | bitvec_write_field(dest, wp,0x1,1); // USF_TN 5 |
| 266 | bitvec_write_field(dest, wp,0x1,3); // USF_TN 5 |
| 267 | bitvec_write_field(dest, wp,0x0,2); // USF_TN 6 - 7 |
| 268 | // bitvec_write_field(dest, wp,0x0,1); // Measurement Mapping struct not present |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 269 | } |
| 270 | |
Ivan Kluchnikov | 5310d45 | 2012-04-17 22:00:31 +0400 | [diff] [blame] | 271 | |
| 272 | // GSM 04.08 9.1.18 Immediate assignment |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 273 | int write_immediate_assignment(bitvec * dest, uint8_t downlink, uint8_t ra, uint32_t fn, |
Andreas Eversberg | 0aed654 | 2012-06-23 10:33:16 +0200 | [diff] [blame^] | 274 | uint8_t ta, uint16_t arfcn, uint8_t ts, uint8_t tsc, uint8_t tfi = 0, uint32_t tlli = 0) |
Ivan Kluchnikov | 5310d45 | 2012-04-17 22:00:31 +0400 | [diff] [blame] | 275 | { |
| 276 | unsigned wp = 0; |
| 277 | |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 278 | bitvec_write_field(dest, wp,0x0,4); // Skip Indicator |
| 279 | bitvec_write_field(dest, wp,0x6,4); // Protocol Discriminator |
| 280 | bitvec_write_field(dest, wp,0x3F,8); // Immediate Assignment Message Type |
Ivan Kluchnikov | 5310d45 | 2012-04-17 22:00:31 +0400 | [diff] [blame] | 281 | |
| 282 | // 10.5.2.25b Dedicated mode or TBF |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 283 | bitvec_write_field(dest, wp,0x0,1); // spare |
| 284 | bitvec_write_field(dest, wp,0x0,1); // TMA : Two-message assignment: No meaning |
| 285 | bitvec_write_field(dest, wp,downlink,1); // Downlink : Downlink assignment to mobile in packet idle mode |
| 286 | 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] | 287 | |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 288 | bitvec_write_field(dest, wp,0x0,4); // Page Mode |
Ivan Kluchnikov | 5310d45 | 2012-04-17 22:00:31 +0400 | [diff] [blame] | 289 | |
| 290 | // GSM 04.08 10.5.2.25a Packet Channel Description |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 291 | bitvec_write_field(dest, wp,0x1,5); // Channel type |
Andreas Eversberg | 0aed654 | 2012-06-23 10:33:16 +0200 | [diff] [blame^] | 292 | bitvec_write_field(dest, wp,ts,3); // TN |
| 293 | bitvec_write_field(dest, wp,tsc,3); // TSC |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 294 | bitvec_write_field(dest, wp,0x0,3); // non-hopping RF channel configuraion |
Andreas Eversberg | 0aed654 | 2012-06-23 10:33:16 +0200 | [diff] [blame^] | 295 | bitvec_write_field(dest, wp,arfcn,10); // ARFCN |
Ivan Kluchnikov | 5310d45 | 2012-04-17 22:00:31 +0400 | [diff] [blame] | 296 | |
| 297 | //10.5.2.30 Request Reference |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 298 | bitvec_write_field(dest, wp,ra,8); // RA |
| 299 | bitvec_write_field(dest, wp,(fn / (26 * 51)) % 32,5); // T1' |
| 300 | bitvec_write_field(dest, wp,fn % 51,6); // T3 |
| 301 | bitvec_write_field(dest, wp,fn % 26,5); // T2 |
Ivan Kluchnikov | 5310d45 | 2012-04-17 22:00:31 +0400 | [diff] [blame] | 302 | |
| 303 | // 10.5.2.40 Timing Advance |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 304 | bitvec_write_field(dest, wp,0x0,2); // spare |
| 305 | bitvec_write_field(dest, wp,ta,6); // Timing Advance value |
Ivan Kluchnikov | 5310d45 | 2012-04-17 22:00:31 +0400 | [diff] [blame] | 306 | |
| 307 | // No mobile allocation in non-hopping systems. |
| 308 | // A zero-length LV. Just write L=0. |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 309 | bitvec_write_field(dest, wp,0,8); |
Ivan Kluchnikov | 5310d45 | 2012-04-17 22:00:31 +0400 | [diff] [blame] | 310 | |
| 311 | if (downlink) |
| 312 | { |
| 313 | // GSM 04.08 10.5.2.16 IA Rest Octets |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 314 | bitvec_write_field(dest, wp, 3, 2); // "HH" |
| 315 | bitvec_write_field(dest, wp, 1, 2); // "01" Packet Downlink Assignment |
| 316 | bitvec_write_field(dest, wp,tlli,32); // TLLI |
| 317 | bitvec_write_field(dest, wp,0x1,1); // switch TFI : on |
| 318 | bitvec_write_field(dest, wp,tfi,5); // TFI |
| 319 | bitvec_write_field(dest, wp,0x0,1); // RLC acknowledged mode |
| 320 | bitvec_write_field(dest, wp,0x0,1); // ALPHA = present |
| 321 | bitvec_write_field(dest, wp,0x0,5); // GAMMA power control parameter |
| 322 | bitvec_write_field(dest, wp,0x0,1); // Polling Bit |
| 323 | bitvec_write_field(dest, wp,0x1,1); // TA_VALID ??? |
| 324 | bitvec_write_field(dest, wp,0x1,1); // switch TIMING_ADVANCE_INDEX = on |
| 325 | bitvec_write_field(dest, wp,0x0,4); // TIMING_ADVANCE_INDEX |
| 326 | bitvec_write_field(dest, wp,0x0,1); // TBF Starting TIME present |
| 327 | bitvec_write_field(dest, wp,0x0,1); // P0 not present |
| 328 | bitvec_write_field(dest, wp,0x1,1); // P0 not present |
| 329 | bitvec_write_field(dest, wp,0xb,4); |
Ivan Kluchnikov | 5310d45 | 2012-04-17 22:00:31 +0400 | [diff] [blame] | 330 | } |
| 331 | else |
| 332 | { |
| 333 | // GMS 04.08 10.5.2.37b 10.5.2.16 |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 334 | bitvec_write_field(dest, wp, 3, 2); // "HH" |
| 335 | bitvec_write_field(dest, wp, 0, 2); // "0" Packet Uplink Assignment |
| 336 | bitvec_write_field(dest, wp, 1, 1); // Block Allocation : Not Single Block Allocation |
| 337 | bitvec_write_field(dest, wp, tfi, 5); // TFI_ASSIGNMENT Temporary Flow Identity |
| 338 | bitvec_write_field(dest, wp, 0, 1); // POLLING |
| 339 | bitvec_write_field(dest, wp, 0, 1); // ALLOCATION_TYPE: dynamic |
| 340 | bitvec_write_field(dest, wp, 1, 3); // USF |
| 341 | bitvec_write_field(dest, wp, 1, 1); // USF_GRANULARITY |
| 342 | bitvec_write_field(dest, wp, 0 , 1); // "0" power control: Not Present |
| 343 | bitvec_write_field(dest, wp, 0, 2); // CHANNEL_CODING_COMMAND |
| 344 | bitvec_write_field(dest, wp, 1, 1); // TLLI_BLOCK_CHANNEL_CODING |
| 345 | bitvec_write_field(dest, wp, 1 , 1); // "1" Alpha : Present |
| 346 | bitvec_write_field(dest, wp, 0, 4); // Alpha |
| 347 | bitvec_write_field(dest, wp, 0, 5); // Gamma |
| 348 | bitvec_write_field(dest, wp, 0, 1); // TIMING_ADVANCE_INDEX_FLAG |
| 349 | bitvec_write_field(dest, wp, 0, 1); // TBF_STARTING_TIME_FLAG |
Ivan Kluchnikov | 5310d45 | 2012-04-17 22:00:31 +0400 | [diff] [blame] | 350 | } |
| 351 | |
| 352 | if (wp%8) |
| 353 | return wp/8+1; |
| 354 | else |
| 355 | return wp/8; |
| 356 | } |
| 357 | |
| 358 | |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 359 | 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] | 360 | { |
Ivan Kluchnikov | 5310d45 | 2012-04-17 22:00:31 +0400 | [diff] [blame] | 361 | // GSM 04.08 10.5.2.16 |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 362 | unsigned wp = 0; |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 363 | bitvec_write_field(dest, wp, 3, 2); // "HH" |
| 364 | bitvec_write_field(dest, wp, 1, 2); // "01" Packet Downlink Assignment |
| 365 | bitvec_write_field(dest, wp,tlli,32); // TLLI |
| 366 | bitvec_write_field(dest, wp,0x1,1); // switch TFI : on |
| 367 | bitvec_write_field(dest, wp,tfi,5); // TFI |
| 368 | bitvec_write_field(dest, wp,0x0,1); // RLC acknowledged mode |
| 369 | bitvec_write_field(dest, wp,0x0,1); // ALPHA = present |
| 370 | bitvec_write_field(dest, wp,0x0,5); // GAMMA power control parameter |
| 371 | bitvec_write_field(dest, wp,0x0,1); // Polling Bit |
| 372 | bitvec_write_field(dest, wp,0x1,1); // TA_VALID ??? |
| 373 | bitvec_write_field(dest, wp,0x1,1); // switch TIMING_ADVANCE_INDEX = on |
| 374 | bitvec_write_field(dest, wp,0x0,4); // TIMING_ADVANCE_INDEX |
| 375 | bitvec_write_field(dest, wp,0x0,1); // TBF Starting TIME present |
| 376 | bitvec_write_field(dest, wp,0x0,1); // P0 not present |
| 377 | bitvec_write_field(dest, wp,0x1,1); // P0 not present |
| 378 | bitvec_write_field(dest, wp,0xb,4); |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 379 | } |
| 380 | |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 381 | 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] | 382 | { |
| 383 | // TODO We should use our implementation of encode RLC/MAC Control messages. |
| 384 | unsigned wp = 0; |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 385 | bitvec_write_field(dest, wp,0x1,2); // payload |
| 386 | bitvec_write_field(dest, wp,0x0,2); // Uplink block with TDMA framenumber |
| 387 | if (cv == 0) bitvec_write_field(dest, wp,0x1,1); // Suppl/Polling Bit |
| 388 | else bitvec_write_field(dest, wp,0x0,1); //Suppl/Polling Bit |
| 389 | bitvec_write_field(dest, wp,0x1,3); // Uplink state flag |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 390 | |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 391 | //bitvec_write_field(dest, wp,0x0,1); // Reduced block sequence number |
| 392 | //bitvec_write_field(dest, wp,BSN+6,5); // Radio transaction identifier |
| 393 | //bitvec_write_field(dest, wp,0x1,1); // Final segment |
| 394 | //bitvec_write_field(dest, wp,0x1,1); // Address control |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 395 | |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 396 | //bitvec_write_field(dest, wp,0x0,2); // Power reduction: 0 |
| 397 | //bitvec_write_field(dest, wp,TFI,5); // Temporary flow identifier |
| 398 | //bitvec_write_field(dest, wp,0x1,1); // Direction |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 399 | |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 400 | bitvec_write_field(dest, wp,0x09,6); // MESSAGE TYPE |
| 401 | bitvec_write_field(dest, wp,0x0,2); // Page Mode |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 402 | |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 403 | bitvec_write_field(dest, wp,0x0,2); |
| 404 | bitvec_write_field(dest, wp,tfi,5); // Uplink TFI |
| 405 | bitvec_write_field(dest, wp,0x0,1); |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 406 | |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 407 | bitvec_write_field(dest, wp,0x0,2); // CS1 |
| 408 | if (cv == 0) bitvec_write_field(dest, wp,0x1,1); // FINAL_ACK_INDICATION |
| 409 | else bitvec_write_field(dest, wp,0x0,1); // FINAL_ACK_INDICATION |
| 410 | bitvec_write_field(dest, wp,bsn + 1,7); // STARTING_SEQUENCE_NUMBER |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 411 | // RECEIVE_BLOCK_BITMAP |
| 412 | for (unsigned i=0; i<8; i++) { |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 413 | bitvec_write_field(dest, wp,0xff,8); |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 414 | } |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 415 | bitvec_write_field(dest, wp,0x1,1); // CONTENTION_RESOLUTION_TLLI = present |
| 416 | bitvec_write_field(dest, wp,tlli,8*4); |
| 417 | bitvec_write_field(dest, wp,0x00,4); //spare |
Ivan Kluchnikov | 0b450c1 | 2012-05-24 22:47:12 +0400 | [diff] [blame] | 418 | bitvec_write_field(dest, wp,0x5,4); //0101 |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 419 | } |
| 420 | |
| 421 | void gprs_rlcmac_tx_ul_ack(uint8_t tfi, uint32_t tlli, RlcMacUplinkDataBlock_t * ul_data_block) |
| 422 | { |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 423 | bitvec *packet_uplink_ack_vec = bitvec_alloc(23); |
| 424 | bitvec_unhex(packet_uplink_ack_vec, "2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b"); |
| 425 | 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] | 426 | 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] | 427 | RlcMacDownlink_t * packet_uplink_ack = (RlcMacDownlink_t *)malloc(sizeof(RlcMacDownlink_t)); |
Ivan Kluchnikov | a9f1ff2 | 2012-05-24 22:25:06 +0400 | [diff] [blame] | 428 | LOGP(DRLCMAC, LOGL_NOTICE, "+++++++++++++++++++++++++ TX : Packet Uplink Ack +++++++++++++++++++++++++\n"); |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 429 | decode_gsm_rlcmac_downlink(packet_uplink_ack_vec, packet_uplink_ack); |
Ivan Kluchnikov | a9f1ff2 | 2012-05-24 22:25:06 +0400 | [diff] [blame] | 430 | LOGPC(DRLCMAC, LOGL_NOTICE, "\n"); |
| 431 | LOGP(DRLCMAC, LOGL_NOTICE, "------------------------- TX : Packet Uplink Ack -------------------------\n"); |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 432 | free(packet_uplink_ack); |
Andreas Eversberg | 0aed654 | 2012-06-23 10:33:16 +0200 | [diff] [blame^] | 433 | gprs_rlcmac_enqueue_block(packet_uplink_ack_vec, 23); |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 434 | bitvec_free(packet_uplink_ack_vec); |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 435 | } |
| 436 | |
| 437 | void gprs_rlcmac_data_block_parse(gprs_rlcmac_tbf* tbf, RlcMacUplinkDataBlock_t * ul_data_block) |
| 438 | { |
Ivan Kluchnikov | bceb3fb | 2012-06-05 16:56:27 +0400 | [diff] [blame] | 439 | // 1. Count the number of octets in header and number of LLC PDU in uplink data block. |
| 440 | unsigned data_block_hdr_len = 3; // uplink data block header length: 3 mandatory octets |
| 441 | unsigned llc_pdu_num = 0; // number of LLC PDU in data block |
| 442 | |
| 443 | |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 444 | if (ul_data_block->E_1 == 0) // Extension octet follows immediately |
| 445 | { |
Ivan Kluchnikov | bceb3fb | 2012-06-05 16:56:27 +0400 | [diff] [blame] | 446 | unsigned i = -1; |
| 447 | do |
Ivan Kluchnikov | b2b8100 | 2012-06-04 21:57:02 +0400 | [diff] [blame] | 448 | { |
Ivan Kluchnikov | bceb3fb | 2012-06-05 16:56:27 +0400 | [diff] [blame] | 449 | i++; |
| 450 | data_block_hdr_len += 1; |
| 451 | llc_pdu_num++; |
Ivan Kluchnikov | 2f69acd | 2012-06-12 12:42:16 +0400 | [diff] [blame] | 452 | |
| 453 | // Singular case, TS 44.060 10.4.14 |
| 454 | if (ul_data_block->LENGTH_INDICATOR[i] == 0) |
| 455 | { |
| 456 | break; |
| 457 | } |
| 458 | |
Ivan Kluchnikov | bceb3fb | 2012-06-05 16:56:27 +0400 | [diff] [blame] | 459 | // New LLC PDU starts after the current LLC PDU and continues until |
| 460 | // the end of the RLC information field, no more extension octets. |
| 461 | 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] | 462 | { |
Ivan Kluchnikov | bceb3fb | 2012-06-05 16:56:27 +0400 | [diff] [blame] | 463 | llc_pdu_num++; |
Ivan Kluchnikov | b2b8100 | 2012-06-04 21:57:02 +0400 | [diff] [blame] | 464 | } |
Ivan Kluchnikov | bceb3fb | 2012-06-05 16:56:27 +0400 | [diff] [blame] | 465 | } 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] | 466 | } |
| 467 | else |
| 468 | { |
Ivan Kluchnikov | bceb3fb | 2012-06-05 16:56:27 +0400 | [diff] [blame] | 469 | llc_pdu_num++; |
| 470 | } |
| 471 | if(ul_data_block->TI == 1) // TLLI field is present |
| 472 | { |
| 473 | tbf->tlli = ul_data_block->TLLI; |
| 474 | data_block_hdr_len += 4; // TLLI length : 4 octets |
| 475 | 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] | 476 | { |
Ivan Kluchnikov | bceb3fb | 2012-06-05 16:56:27 +0400 | [diff] [blame] | 477 | data_block_hdr_len += 1; // PFI length : 1 octet |
| 478 | } |
| 479 | } |
| 480 | |
| 481 | // 2. Extract all LLC PDU from uplink data block and send them to SGSN. |
| 482 | unsigned llc_pdu_len = 0; |
| 483 | unsigned data_octet_num = 0; |
| 484 | |
| 485 | for (unsigned num = 0; num < llc_pdu_num; num ++) |
| 486 | { |
| 487 | if (ul_data_block->E_1 == 0) // Extension octet follows immediately |
| 488 | { |
Ivan Kluchnikov | 2f69acd | 2012-06-12 12:42:16 +0400 | [diff] [blame] | 489 | // Singular case, TS 44.060 10.4.14 |
| 490 | if (ul_data_block->LENGTH_INDICATOR[num] == 0) |
| 491 | { |
| 492 | llc_pdu_len = UL_RLC_DATA_BLOCK_LEN - data_block_hdr_len; |
| 493 | } |
| 494 | else |
| 495 | { |
| 496 | llc_pdu_len = ul_data_block->LENGTH_INDICATOR[num]; |
| 497 | } |
Ivan Kluchnikov | bceb3fb | 2012-06-05 16:56:27 +0400 | [diff] [blame] | 498 | } |
| 499 | else |
| 500 | { |
| 501 | llc_pdu_len = UL_RLC_DATA_BLOCK_LEN - data_block_hdr_len; |
| 502 | } |
| 503 | |
| 504 | for (unsigned i = tbf->data_index; i < tbf->data_index + llc_pdu_len; i++) |
| 505 | { |
| 506 | tbf->rlc_data[i] = ul_data_block->RLC_DATA[data_octet_num]; |
| 507 | data_octet_num++; |
| 508 | } |
| 509 | tbf->data_index += llc_pdu_len; |
| 510 | |
| 511 | if (ul_data_block->E_1 == 0) // Extension octet follows immediately |
| 512 | { |
| 513 | // New LLC PDU starts after the current LLC PDU |
| 514 | if (ul_data_block->M[num] == 1) |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 515 | { |
Ivan Kluchnikov | bceb3fb | 2012-06-05 16:56:27 +0400 | [diff] [blame] | 516 | gprs_rlcmac_tx_ul_ud(tbf); |
| 517 | tbf->data_index = 0; |
| 518 | // New LLC PDU continues until the end of the RLC information field, no more extension octets. |
| 519 | if ((ul_data_block->E[num] == 1)) |
| 520 | { |
| 521 | llc_pdu_len = UL_RLC_DATA_BLOCK_LEN - data_block_hdr_len - data_octet_num; |
| 522 | for (unsigned i = tbf->data_index; i < tbf->data_index + llc_pdu_len; i++) |
| 523 | { |
| 524 | tbf->rlc_data[i] = ul_data_block->RLC_DATA[data_octet_num]; |
| 525 | data_octet_num++; |
| 526 | } |
| 527 | tbf->data_index += llc_pdu_len; |
| 528 | num++; |
| 529 | } |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 530 | } |
| 531 | } |
| 532 | } |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 533 | } |
| 534 | |
| 535 | /* Received Uplink RLC data block. */ |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 536 | int gprs_rlcmac_rcv_data_block(bitvec *rlc_block) |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 537 | { |
| 538 | struct gprs_rlcmac_tbf *tbf; |
| 539 | |
Ivan Kluchnikov | a9f1ff2 | 2012-05-24 22:25:06 +0400 | [diff] [blame] | 540 | LOGP(DRLCMAC, LOGL_NOTICE, "RX: [PCU <- BTS] Uplink Data Block\n"); |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 541 | RlcMacUplinkDataBlock_t * ul_data_block = (RlcMacUplinkDataBlock_t *)malloc(sizeof(RlcMacUplinkDataBlock_t)); |
Ivan Kluchnikov | a9f1ff2 | 2012-05-24 22:25:06 +0400 | [diff] [blame] | 542 | LOGP(DRLCMAC, LOGL_NOTICE, "+++++++++++++++++++++++++ RX : Uplink Data Block +++++++++++++++++++++++++\n"); |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 543 | decode_gsm_rlcmac_uplink_data(rlc_block, ul_data_block); |
Ivan Kluchnikov | a9f1ff2 | 2012-05-24 22:25:06 +0400 | [diff] [blame] | 544 | LOGP(DRLCMAC, LOGL_NOTICE, "------------------------- RX : Uplink Data Block -------------------------\n"); |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 545 | tbf = tbf_by_tfi(ul_data_block->TFI); |
| 546 | if (!tbf) { |
Ivan Kluchnikov | 5310d45 | 2012-04-17 22:00:31 +0400 | [diff] [blame] | 547 | return 0; |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 548 | } |
Ivan Kluchnikov | b2b8100 | 2012-06-04 21:57:02 +0400 | [diff] [blame] | 549 | |
| 550 | if (ul_data_block->TI == 1) |
| 551 | { |
| 552 | tbf->tlli = ul_data_block->TLLI; |
| 553 | } |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 554 | |
| 555 | switch (tbf->state) { |
| 556 | case GPRS_RLCMAC_WAIT_DATA_SEQ_START: |
| 557 | if (ul_data_block->BSN == 0) { |
| 558 | tbf->data_index = 0; |
| 559 | gprs_rlcmac_data_block_parse(tbf, ul_data_block); |
| 560 | gprs_rlcmac_tx_ul_ack(tbf->tfi, tbf->tlli, ul_data_block); |
Ivan Kluchnikov | 9c795ab | 2012-05-24 23:12:59 +0400 | [diff] [blame] | 561 | if (ul_data_block->CV == 0) { |
| 562 | // Recieved last Data Block in this sequence. |
Ivan Kluchnikov | 6347711 | 2012-06-12 18:14:49 +0400 | [diff] [blame] | 563 | tbf->state = GPRS_RLCMAC_WAIT_NEXT_DATA_SEQ; |
Ivan Kluchnikov | 9c795ab | 2012-05-24 23:12:59 +0400 | [diff] [blame] | 564 | gprs_rlcmac_tx_ul_ud(tbf); |
| 565 | } else { |
| 566 | tbf->bsn = ul_data_block->BSN; |
| 567 | tbf->state = GPRS_RLCMAC_WAIT_NEXT_DATA_BLOCK; |
| 568 | } |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 569 | } |
| 570 | break; |
| 571 | case GPRS_RLCMAC_WAIT_NEXT_DATA_BLOCK: |
| 572 | if (tbf->bsn == (ul_data_block->BSN - 1)) { |
| 573 | gprs_rlcmac_data_block_parse(tbf, ul_data_block); |
| 574 | gprs_rlcmac_tx_ul_ack(tbf->tfi, tbf->tlli, ul_data_block); |
| 575 | if (ul_data_block->CV == 0) { |
| 576 | // Recieved last Data Block in this sequence. |
Ivan Kluchnikov | 6347711 | 2012-06-12 18:14:49 +0400 | [diff] [blame] | 577 | tbf->state = GPRS_RLCMAC_WAIT_NEXT_DATA_SEQ; |
Ivan Kluchnikov | 9c795ab | 2012-05-24 23:12:59 +0400 | [diff] [blame] | 578 | gprs_rlcmac_tx_ul_ud(tbf); |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 579 | } else { |
| 580 | tbf->bsn = ul_data_block->BSN; |
| 581 | tbf->state = GPRS_RLCMAC_WAIT_NEXT_DATA_BLOCK; |
| 582 | } |
| 583 | } else { |
| 584 | // Recieved Data Block with unexpected BSN. |
| 585 | // We should try to find nesessary Data Block. |
| 586 | tbf->state = GPRS_RLCMAC_WAIT_NEXT_DATA_BLOCK; |
| 587 | } |
| 588 | break; |
| 589 | case GPRS_RLCMAC_WAIT_NEXT_DATA_SEQ: |
| 590 | // Now we just ignore all Data Blocks and wait next Uplink TBF |
| 591 | break; |
| 592 | } |
| 593 | |
| 594 | free(ul_data_block); |
| 595 | return 1; |
| 596 | } |
| 597 | |
| 598 | /* Received Uplink RLC control block. */ |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 599 | int gprs_rlcmac_rcv_control_block(bitvec *rlc_block) |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 600 | { |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 601 | uint8_t tfi = 0; |
| 602 | uint32_t tlli = 0; |
| 603 | struct gprs_rlcmac_tbf *tbf; |
Andreas Eversberg | 0aed654 | 2012-06-23 10:33:16 +0200 | [diff] [blame^] | 604 | // struct gprs_rlcmac_tbf *ul_tbf; |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 605 | |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 606 | RlcMacUplink_t * ul_control_block = (RlcMacUplink_t *)malloc(sizeof(RlcMacUplink_t)); |
Ivan Kluchnikov | a9f1ff2 | 2012-05-24 22:25:06 +0400 | [diff] [blame] | 607 | LOGP(DRLCMAC, LOGL_NOTICE, "+++++++++++++++++++++++++ RX : Uplink Control Block +++++++++++++++++++++++++\n"); |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 608 | decode_gsm_rlcmac_uplink(rlc_block, ul_control_block); |
Ivan Kluchnikov | a9f1ff2 | 2012-05-24 22:25:06 +0400 | [diff] [blame] | 609 | LOGPC(DRLCMAC, LOGL_NOTICE, "\n"); |
| 610 | LOGP(DRLCMAC, LOGL_NOTICE, "------------------------- RX : Uplink Control Block -------------------------\n"); |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 611 | switch (ul_control_block->u.MESSAGE_TYPE) { |
| 612 | case MT_PACKET_CONTROL_ACK: |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 613 | tlli = ul_control_block->u.Packet_Control_Acknowledgement.TLLI; |
| 614 | tbf = tbf_by_tlli(tlli); |
| 615 | if (!tbf) { |
| 616 | return 0; |
| 617 | } |
Ivan Kluchnikov | 9c795ab | 2012-05-24 23:12:59 +0400 | [diff] [blame] | 618 | LOGP(DRLCMAC, LOGL_NOTICE, "RX: [PCU <- BTS] TFI: %u TLLI: 0x%08x Packet Control Ack\n", tbf->tfi, tbf->tlli); |
| 619 | LOGP(DRLCMAC, LOGL_NOTICE, "TBF: [UPLINK] END TFI: %u TLLI: 0x%08x \n", tbf->tfi, tbf->tlli); |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 620 | tbf_free(tbf); |
| 621 | break; |
| 622 | case MT_PACKET_DOWNLINK_ACK_NACK: |
| 623 | tfi = ul_control_block->u.Packet_Downlink_Ack_Nack.DOWNLINK_TFI; |
| 624 | tbf = tbf_by_tfi(tfi); |
| 625 | if (!tbf) { |
| 626 | return 0; |
| 627 | } |
Ivan Kluchnikov | 9c795ab | 2012-05-24 23:12:59 +0400 | [diff] [blame] | 628 | LOGP(DRLCMAC, LOGL_NOTICE, "RX: [PCU <- BTS] TFI: %u TLLI: 0x%08x Packet Downlink Ack/Nack\n", tbf->tfi, tbf->tlli); |
| 629 | tlli = tbf->tlli; |
| 630 | LOGP(DRLCMAC, LOGL_NOTICE, "TBF: [DOWNLINK] END TFI: %u TLLI: 0x%08x \n", tbf->tfi, tbf->tlli); |
| 631 | tbf_free(tbf); |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 632 | break; |
| 633 | } |
| 634 | free(ul_control_block); |
| 635 | return 1; |
| 636 | } |
| 637 | |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 638 | void gprs_rlcmac_rcv_block(bitvec *rlc_block) |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 639 | { |
| 640 | unsigned readIndex = 0; |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 641 | unsigned payload = bitvec_read_field(rlc_block, readIndex, 2); |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 642 | |
| 643 | switch (payload) { |
| 644 | case GPRS_RLCMAC_DATA_BLOCK: |
| 645 | gprs_rlcmac_rcv_data_block(rlc_block); |
| 646 | break; |
| 647 | case GPRS_RLCMAC_CONTROL_BLOCK: |
| 648 | gprs_rlcmac_rcv_control_block(rlc_block); |
| 649 | break; |
| 650 | case GPRS_RLCMAC_CONTROL_BLOCK_OPT: |
Ivan Kluchnikov | 856221f | 2012-06-15 09:31:29 +0400 | [diff] [blame] | 651 | 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] | 652 | default: |
Ivan Kluchnikov | 856221f | 2012-06-15 09:31:29 +0400 | [diff] [blame] | 653 | LOGP(DRLCMAC, LOGL_NOTICE, "Unknown RLCMAC block payload.\n"); |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 654 | } |
| 655 | } |
| 656 | |
Andreas Eversberg | 0aed654 | 2012-06-23 10:33:16 +0200 | [diff] [blame^] | 657 | struct msgb *gen_dummy_msg(void) |
| 658 | { |
| 659 | struct msgb *msg = msgb_alloc(23, "rlcmac_dl_idle"); |
| 660 | // RLC/MAC filler with USF=1 |
| 661 | bitvec *filler = bitvec_alloc(23); |
| 662 | bitvec_unhex(filler, "41942b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b"); |
| 663 | bitvec_pack(filler, msgb_put(msg, 23)); |
| 664 | bitvec_free(filler); |
| 665 | return msg; |
| 666 | } |
| 667 | |
| 668 | void gprs_rlcmac_rcv_rts_block(uint8_t trx, uint8_t ts, uint16_t arfcn, |
| 669 | uint32_t fn, uint8_t block_nr) |
| 670 | { |
| 671 | struct msgb *msg; |
| 672 | |
| 673 | set_current_fn(fn); |
| 674 | msg = msgb_dequeue(&block_queue); |
| 675 | if (!msg) |
| 676 | msg = gen_dummy_msg(); |
| 677 | pcu_l1if_tx_pdtch(msg, trx, ts, arfcn, fn, block_nr); |
| 678 | } |
| 679 | |
| 680 | int select_pdch(uint8_t *_trx, uint8_t *_ts) |
| 681 | { |
| 682 | uint8_t trx, ts; |
| 683 | |
| 684 | for (trx = 0; trx < 8; trx++) { |
| 685 | for (ts = 0; ts < 8; ts++) { |
| 686 | if (pcu_l1if_bts.trx[trx].ts[ts].enable) { |
| 687 | *_trx = trx; |
| 688 | *_ts = ts; |
| 689 | return 0; |
| 690 | } |
| 691 | } |
| 692 | } |
| 693 | |
| 694 | return -EBUSY; |
| 695 | } |
| 696 | |
| 697 | int gprs_rlcmac_rcv_rach(uint8_t ra, uint32_t Fn, int16_t qta) |
Ivan Kluchnikov | 5310d45 | 2012-04-17 22:00:31 +0400 | [diff] [blame] | 698 | { |
| 699 | struct gprs_rlcmac_tbf *tbf; |
Andreas Eversberg | 0aed654 | 2012-06-23 10:33:16 +0200 | [diff] [blame^] | 700 | uint8_t trx, ts; |
Ivan Kluchnikov | 5310d45 | 2012-04-17 22:00:31 +0400 | [diff] [blame] | 701 | |
Andreas Eversberg | 0aed654 | 2012-06-23 10:33:16 +0200 | [diff] [blame^] | 702 | if (select_pdch(&trx, &ts)) { |
| 703 | LOGP(DRLCMAC, LOGL_NOTICE, "No PDCH ressource\n"); |
| 704 | /* FIXME: send reject */ |
| 705 | return -EBUSY; |
| 706 | } |
Ivan Kluchnikov | 5310d45 | 2012-04-17 22:00:31 +0400 | [diff] [blame] | 707 | // Create new TBF |
| 708 | int tfi = tfi_alloc(); |
| 709 | if (tfi < 0) { |
| 710 | return tfi; |
| 711 | } |
Andreas Eversberg | 0aed654 | 2012-06-23 10:33:16 +0200 | [diff] [blame^] | 712 | tbf = tbf_alloc(tfi, trx, ts); |
| 713 | if (qta < 0) |
| 714 | qta = 0; |
| 715 | if (qta > 252) |
| 716 | qta = 252; |
| 717 | tbf->ta = qta >> 2; |
Ivan Kluchnikov | 5310d45 | 2012-04-17 22:00:31 +0400 | [diff] [blame] | 718 | tbf->direction = GPRS_RLCMAC_UL_TBF; |
| 719 | tbf->state = GPRS_RLCMAC_WAIT_DATA_SEQ_START; |
Ivan Kluchnikov | a9f1ff2 | 2012-05-24 22:25:06 +0400 | [diff] [blame] | 720 | LOGP(DRLCMAC, LOGL_NOTICE, "TBF: [UPLINK] START TFI: %u\n", tbf->tfi); |
Andreas Eversberg | 0aed654 | 2012-06-23 10:33:16 +0200 | [diff] [blame^] | 721 | LOGP(DRLCMAC, LOGL_NOTICE, "RX: [PCU <- BTS] TFI: %u RACH qbit-ta=%d ra=%d, Fn=%d (%d,%d,%d)\n", tbf->tfi, qta, ra, Fn, (Fn / (26 * 51)) % 32, Fn % 51, Fn % 26); |
Ivan Kluchnikov | a9f1ff2 | 2012-05-24 22:25:06 +0400 | [diff] [blame] | 722 | LOGP(DRLCMAC, LOGL_NOTICE, "TX: [PCU -> BTS] TFI: %u Packet Immidiate Assignment\n", tbf->tfi); |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 723 | bitvec *immediate_assignment = bitvec_alloc(23); |
| 724 | bitvec_unhex(immediate_assignment, "2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b"); |
Andreas Eversberg | 0aed654 | 2012-06-23 10:33:16 +0200 | [diff] [blame^] | 725 | int len = write_immediate_assignment(immediate_assignment, 0, ra, Fn, tbf->ta, tbf->arfcn, tbf->ts, tbf->tsc, tbf->tfi); |
| 726 | pcu_l1if_tx_agch(immediate_assignment, len); |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 727 | bitvec_free(immediate_assignment); |
Andreas Eversberg | 0aed654 | 2012-06-23 10:33:16 +0200 | [diff] [blame^] | 728 | |
| 729 | return 0; |
Ivan Kluchnikov | 5310d45 | 2012-04-17 22:00:31 +0400 | [diff] [blame] | 730 | } |
| 731 | |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 732 | // Send RLC data to OpenBTS. |
Ivan Kluchnikov | c320d86 | 2012-03-18 15:04:48 +0400 | [diff] [blame] | 733 | void gprs_rlcmac_tx_dl_data_block(uint32_t tlli, uint8_t tfi, uint8_t *pdu, int start_index, int end_index, uint8_t bsn, uint8_t fbi) |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 734 | { |
| 735 | int spare_len = 0; |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 736 | bitvec *data_block_vector = bitvec_alloc(BLOCK_LEN); |
| 737 | bitvec_unhex(data_block_vector, "2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b"); |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 738 | RlcMacDownlinkDataBlock_t * data_block = (RlcMacDownlinkDataBlock_t *)malloc(sizeof(RlcMacDownlinkDataBlock_t)); |
| 739 | data_block->PAYLOAD_TYPE = 0; |
| 740 | data_block->RRBP = 0; |
| 741 | data_block->SP = 1; |
| 742 | data_block->USF = 1; |
| 743 | data_block->PR = 0; |
Ivan Kluchnikov | c320d86 | 2012-03-18 15:04:48 +0400 | [diff] [blame] | 744 | data_block->TFI = tfi; |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 745 | data_block->FBI = fbi; |
| 746 | data_block->BSN = bsn; |
Ivan Kluchnikov | e359423 | 2012-06-07 01:12:29 +0400 | [diff] [blame] | 747 | |
| 748 | // Last RLC data block of current LLC PDU |
| 749 | if (fbi == 1) |
| 750 | { |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 751 | data_block->E_1 = 0; |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 752 | data_block->M[0] = 0; |
| 753 | data_block->E[0] = 1; |
Ivan Kluchnikov | e359423 | 2012-06-07 01:12:29 +0400 | [diff] [blame] | 754 | // Singular case, TS 44.060 10.4.14 |
| 755 | if ((end_index - start_index) == (BLOCK_LEN - 3)) |
| 756 | { |
| 757 | data_block->FBI = 0; |
| 758 | data_block->LENGTH_INDICATOR[0] = 0; |
| 759 | spare_len = 0; |
| 760 | end_index--; |
| 761 | } |
| 762 | else |
| 763 | { |
| 764 | data_block->LENGTH_INDICATOR[0] = end_index-start_index; |
| 765 | spare_len = BLOCK_LEN - 4 - data_block->LENGTH_INDICATOR[0]; |
| 766 | } |
| 767 | } |
| 768 | else |
| 769 | { |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 770 | data_block->E_1 = 1; |
| 771 | } |
Ivan Kluchnikov | e359423 | 2012-06-07 01:12:29 +0400 | [diff] [blame] | 772 | |
| 773 | int data_oct_num = 0; |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 774 | int i = 0; |
Ivan Kluchnikov | e359423 | 2012-06-07 01:12:29 +0400 | [diff] [blame] | 775 | // Pack LLC PDU into RLC data field |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 776 | for(i = start_index; i < end_index; i++) { |
Ivan Kluchnikov | e359423 | 2012-06-07 01:12:29 +0400 | [diff] [blame] | 777 | data_block->RLC_DATA[data_oct_num] = pdu[i]; |
| 778 | data_oct_num++; |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 779 | } |
Ivan Kluchnikov | e359423 | 2012-06-07 01:12:29 +0400 | [diff] [blame] | 780 | // Fill spare bits |
| 781 | for(i = data_oct_num; i < data_oct_num + spare_len; i++) { |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 782 | data_block->RLC_DATA[i] = 0x2b; |
| 783 | } |
Ivan Kluchnikov | a9f1ff2 | 2012-05-24 22:25:06 +0400 | [diff] [blame] | 784 | LOGP(DRLCMAC, LOGL_NOTICE, "TX: [PCU -> BTS] Downlink Data Block\n"); |
| 785 | LOGP(DRLCMAC, LOGL_NOTICE, "+++++++++++++++++++++++++ TX : Downlink Data Block +++++++++++++++++++++++++\n"); |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 786 | encode_gsm_rlcmac_downlink_data(data_block_vector, data_block); |
Ivan Kluchnikov | a9f1ff2 | 2012-05-24 22:25:06 +0400 | [diff] [blame] | 787 | LOGP(DRLCMAC, LOGL_NOTICE, "------------------------- TX : Downlink Data Block -------------------------\n"); |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 788 | free(data_block); |
Andreas Eversberg | 0aed654 | 2012-06-23 10:33:16 +0200 | [diff] [blame^] | 789 | gprs_rlcmac_enqueue_block(data_block_vector, BLOCK_LEN); |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 790 | bitvec_free(data_block_vector); |
Ivan Kluchnikov | e359423 | 2012-06-07 01:12:29 +0400 | [diff] [blame] | 791 | |
| 792 | // Singular case, TS 44.060 10.4.14 |
| 793 | if ((fbi == 1)&&((end_index + 1 - start_index) == (BLOCK_LEN - 3))) |
| 794 | { |
| 795 | gprs_rlcmac_tx_dl_data_block(tlli, tfi, pdu, end_index, end_index+1, bsn+1, fbi); |
| 796 | } |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 797 | } |
| 798 | |
| 799 | int gprs_rlcmac_segment_llc_pdu(struct gprs_rlcmac_tbf *tbf) |
| 800 | { |
| 801 | int fbi = 0; |
Ivan Kluchnikov | e359423 | 2012-06-07 01:12:29 +0400 | [diff] [blame] | 802 | int bsn = 0; |
| 803 | int num_blocks = 0; // number of RLC data blocks necessary for LLC PDU transmission |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 804 | |
Ivan Kluchnikov | e359423 | 2012-06-07 01:12:29 +0400 | [diff] [blame] | 805 | |
| 806 | // LLC PDU fits into one RLC data block with optional LI field. |
| 807 | if (tbf->data_index < BLOCK_LEN - 4) |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 808 | { |
Ivan Kluchnikov | e359423 | 2012-06-07 01:12:29 +0400 | [diff] [blame] | 809 | fbi = 1; |
| 810 | gprs_rlcmac_tx_dl_data_block(tbf->tlli, tbf->tfi, tbf->rlc_data, 0, tbf->data_index, bsn, fbi); |
| 811 | } |
| 812 | // Necessary several RLC data blocks for transmit LLC PDU. |
| 813 | else |
| 814 | { |
| 815 | // length of RLC data field in block (no optional octets) |
| 816 | int block_data_len = BLOCK_LEN - 3; |
| 817 | |
| 818 | // number of blocks with 20 octets length RLC data field |
| 819 | num_blocks = tbf->data_index/block_data_len; |
| 820 | |
| 821 | // rest of LLC PDU, which doesn't fit into data blocks with 20 octets RLC data field |
| 822 | int rest_len = tbf->data_index%BLOCK_DATA_LEN; |
| 823 | if (rest_len > 0) |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 824 | { |
Ivan Kluchnikov | e359423 | 2012-06-07 01:12:29 +0400 | [diff] [blame] | 825 | // add one block for transmission rest of LLC PDU |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 826 | num_blocks++; |
| 827 | } |
Ivan Kluchnikov | e359423 | 2012-06-07 01:12:29 +0400 | [diff] [blame] | 828 | |
| 829 | int start_index = 0; |
| 830 | int end_index = 0; |
| 831 | |
| 832 | // Transmit all RLC data blocks of current LLC PDU to MS |
| 833 | for (bsn = 0; bsn < num_blocks; bsn++) |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 834 | { |
Ivan Kluchnikov | e359423 | 2012-06-07 01:12:29 +0400 | [diff] [blame] | 835 | if (bsn == num_blocks-1) |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 836 | { |
| 837 | if (rest_len > 0) |
| 838 | { |
| 839 | block_data_len = rest_len; |
| 840 | } |
| 841 | fbi = 1; |
| 842 | } |
| 843 | end_index = start_index + block_data_len; |
Ivan Kluchnikov | e359423 | 2012-06-07 01:12:29 +0400 | [diff] [blame] | 844 | gprs_rlcmac_tx_dl_data_block(tbf->tlli, tbf->tfi, tbf->rlc_data, start_index, end_index, bsn, fbi); |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 845 | start_index += block_data_len; |
| 846 | } |
| 847 | } |
Andreas Eversberg | 0aed654 | 2012-06-23 10:33:16 +0200 | [diff] [blame^] | 848 | |
| 849 | return 0; |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 850 | } |
| 851 | |
| 852 | /* Send Uplink unit-data to SGSN. */ |
| 853 | void gprs_rlcmac_tx_ul_ud(gprs_rlcmac_tbf *tbf) |
| 854 | { |
| 855 | const uint8_t qos_profile = QOS_PROFILE; |
| 856 | struct msgb *llc_pdu; |
| 857 | unsigned msg_len = NS_HDR_LEN + BSSGP_HDR_LEN + tbf->data_index; |
| 858 | |
Ivan Kluchnikov | b2b8100 | 2012-06-04 21:57:02 +0400 | [diff] [blame] | 859 | LOGP(DBSSGP, LOGL_NOTICE, "TX: [PCU -> SGSN ] TFI: %u TLLI: 0x%08x DataLen: %u", tbf->tfi, tbf->tlli, tbf->data_index); |
| 860 | //LOGP(DBSSGP, LOGL_NOTICE, " Data = "); |
| 861 | //for (unsigned i = 0; i < tbf->data_index; i++) |
| 862 | // LOGPC(DBSSGP, LOGL_NOTICE, "%02x ", tbf->rlc_data[i]); |
Ivan Kluchnikov | c320d86 | 2012-03-18 15:04:48 +0400 | [diff] [blame] | 863 | |
| 864 | bctx->cell_id = CELL_ID; |
| 865 | bctx->nsei = NSEI; |
| 866 | bctx->ra_id.mnc = MNC; |
| 867 | bctx->ra_id.mcc = MCC; |
| 868 | bctx->ra_id.lac = PCU_LAC; |
| 869 | bctx->ra_id.rac = PCU_RAC; |
| 870 | bctx->bvci = BVCI; |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 871 | |
| 872 | llc_pdu = msgb_alloc_headroom(msg_len, msg_len,"llc_pdu"); |
| 873 | msgb_tvlv_push(llc_pdu, BSSGP_IE_LLC_PDU, sizeof(uint8_t)*tbf->data_index, tbf->rlc_data); |
| 874 | bssgp_tx_ul_ud(bctx, tbf->tlli, &qos_profile, llc_pdu); |
| 875 | } |
| 876 | |
Ivan Kluchnikov | c320d86 | 2012-03-18 15:04:48 +0400 | [diff] [blame] | 877 | void gprs_rlcmac_downlink_assignment(gprs_rlcmac_tbf *tbf) |
| 878 | { |
Ivan Kluchnikov | a9f1ff2 | 2012-05-24 22:25:06 +0400 | [diff] [blame] | 879 | 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] | 880 | bitvec *immediate_assignment = bitvec_alloc(23); |
| 881 | bitvec_unhex(immediate_assignment, "2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b"); |
Andreas Eversberg | 0aed654 | 2012-06-23 10:33:16 +0200 | [diff] [blame^] | 882 | int len = write_immediate_assignment(immediate_assignment, 1, 125, get_current_fn(), tbf->ta, tbf->arfcn, tbf->ts, tbf->tsc, tbf->tfi, tbf->tlli); |
| 883 | pcu_l1if_tx_agch(immediate_assignment, len); |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 884 | bitvec_free(immediate_assignment); |
Ivan Kluchnikov | 61a33f7 | 2012-04-12 15:22:06 +0400 | [diff] [blame] | 885 | tbf_gsm_timer_start(tbf, 0, 120); |
Ivan Kluchnikov | c320d86 | 2012-03-18 15:04:48 +0400 | [diff] [blame] | 886 | } |
Ivan Kluchnikov | 9c795ab | 2012-05-24 23:12:59 +0400 | [diff] [blame] | 887 | |
| 888 | void gprs_rlcmac_packet_downlink_assignment(gprs_rlcmac_tbf *tbf) |
| 889 | { |
| 890 | LOGP(DRLCMAC, LOGL_NOTICE, "TX: [PCU -> BTS] TFI: %u TLLI: 0x%08x Packet DL Assignment\n", tbf->tfi, tbf->tlli); |
| 891 | bitvec *packet_downlink_assignment_vec = bitvec_alloc(23); |
| 892 | bitvec_unhex(packet_downlink_assignment_vec, "2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b"); |
Andreas Eversberg | 0aed654 | 2012-06-23 10:33:16 +0200 | [diff] [blame^] | 893 | write_packet_downlink_assignment(packet_downlink_assignment_vec, tbf->tfi, tbf->tlli, tbf->ts, tbf->ta, tbf->tsc); |
Ivan Kluchnikov | 9c795ab | 2012-05-24 23:12:59 +0400 | [diff] [blame] | 894 | RlcMacDownlink_t * packet_downlink_assignment = (RlcMacDownlink_t *)malloc(sizeof(RlcMacDownlink_t)); |
| 895 | LOGP(DRLCMAC, LOGL_NOTICE, "+++++++++++++++++++++++++ TX : Packet Downlink Assignment +++++++++++++++++++++++++\n"); |
| 896 | decode_gsm_rlcmac_downlink(packet_downlink_assignment_vec, packet_downlink_assignment); |
| 897 | LOGPC(DRLCMAC, LOGL_NOTICE, "\n"); |
| 898 | LOGP(DRLCMAC, LOGL_NOTICE, "------------------------- TX : Packet Downlink Assignment -------------------------\n"); |
| 899 | free(packet_downlink_assignment); |
Andreas Eversberg | 0aed654 | 2012-06-23 10:33:16 +0200 | [diff] [blame^] | 900 | gprs_rlcmac_enqueue_block(packet_downlink_assignment_vec, 23); |
Ivan Kluchnikov | 9c795ab | 2012-05-24 23:12:59 +0400 | [diff] [blame] | 901 | bitvec_free(packet_downlink_assignment_vec); |
| 902 | tbf_gsm_timer_start(tbf, 0, 120); |
| 903 | } |