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> |
| 22 | #include <Threads.h> |
| 23 | #include <gprs_rlcmac.h> |
Ivan Kluchnikov | 5310d45 | 2012-04-17 22:00:31 +0400 | [diff] [blame] | 24 | #include <gsmL1prim.h> |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 25 | |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 26 | LLIST_HEAD(gprs_rlcmac_tbfs); |
| 27 | void *rlcmac_tall_ctx; |
| 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) */ |
| 51 | static struct gprs_rlcmac_tbf *tbf_by_tfi(uint8_t tfi) |
| 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 | |
Ivan Kluchnikov | c320d86 | 2012-03-18 15:04:48 +0400 | [diff] [blame] | 62 | static 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 | |
| 72 | struct gprs_rlcmac_tbf *tbf_alloc(uint8_t tfi) |
| 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; |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 81 | llist_add(&tbf->list, &gprs_rlcmac_tbfs); |
| 82 | |
| 83 | return tbf; |
| 84 | } |
| 85 | |
| 86 | static void tbf_free(struct gprs_rlcmac_tbf *tbf) |
| 87 | { |
| 88 | llist_del(&tbf->list); |
| 89 | talloc_free(tbf); |
| 90 | } |
| 91 | |
Ivan Kluchnikov | 61a33f7 | 2012-04-12 15:22:06 +0400 | [diff] [blame] | 92 | |
| 93 | static void tbf_timer_cb(void *_tbf) |
| 94 | { |
| 95 | struct gprs_rlcmac_tbf *tbf = (struct gprs_rlcmac_tbf *)_tbf; |
| 96 | |
| 97 | tbf->num_T_exp++; |
| 98 | |
| 99 | switch (tbf->T) { |
| 100 | case 1111: |
| 101 | // TODO: We should add timers for TBF. |
| 102 | break; |
| 103 | default: |
| 104 | COUT("Timer expired in unknown mode" << tbf->T); |
| 105 | } |
| 106 | } |
| 107 | |
| 108 | static void tbf_timer_start(struct gprs_rlcmac_tbf *tbf, unsigned int T, |
| 109 | unsigned int seconds) |
| 110 | { |
| 111 | if (osmo_timer_pending(&tbf->timer)) |
| 112 | COUT("Starting TBF timer %u while old timer %u pending" << T << tbf->T); |
| 113 | tbf->T = T; |
| 114 | tbf->num_T_exp = 0; |
| 115 | |
| 116 | /* FIXME: we should do this only once ? */ |
| 117 | tbf->timer.data = tbf; |
| 118 | tbf->timer.cb = &tbf_timer_cb; |
| 119 | |
| 120 | osmo_timer_schedule(&tbf->timer, seconds, 0); |
| 121 | } |
| 122 | |
| 123 | |
| 124 | static void tbf_gsm_timer_cb(void *_tbf) |
| 125 | { |
| 126 | struct gprs_rlcmac_tbf *tbf = (struct gprs_rlcmac_tbf *)_tbf; |
| 127 | |
| 128 | tbf->num_fT_exp++; |
| 129 | |
| 130 | switch (tbf->fT) { |
| 131 | case 0: |
| 132 | // This is timer for delay RLC/MAC data sending after Downlink Immediate Assignment on CCCH. |
| 133 | gprs_rlcmac_segment_llc_pdu(tbf); |
Ivan Kluchnikov | a9f1ff2 | 2012-05-24 22:25:06 +0400 | [diff] [blame] | 134 | 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] | 135 | tbf_free(tbf); |
Ivan Kluchnikov | 61a33f7 | 2012-04-12 15:22:06 +0400 | [diff] [blame] | 136 | break; |
| 137 | default: |
| 138 | COUT("Timer expired in unknown mode" << tbf->fT); |
| 139 | } |
| 140 | } |
| 141 | |
| 142 | static void tbf_gsm_timer_start(struct gprs_rlcmac_tbf *tbf, unsigned int fT, |
| 143 | int frames) |
| 144 | { |
| 145 | if (osmo_gsm_timer_pending(&tbf->gsm_timer)) |
| 146 | COUT("Starting TBF timer %u while old timer %u pending" << fT << tbf->fT); |
| 147 | tbf->fT = fT; |
| 148 | tbf->num_fT_exp = 0; |
| 149 | |
| 150 | /* FIXME: we should do this only once ? */ |
| 151 | tbf->gsm_timer.data = tbf; |
| 152 | tbf->gsm_timer.cb = &tbf_gsm_timer_cb; |
| 153 | |
| 154 | osmo_gsm_timer_schedule(&tbf->gsm_timer, frames); |
| 155 | } |
| 156 | |
Ivan Kluchnikov | 0b450c1 | 2012-05-24 22:47:12 +0400 | [diff] [blame] | 157 | 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] | 158 | { |
| 159 | // TODO We should use our implementation of encode RLC/MAC Control messages. |
| 160 | unsigned wp = 0; |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 161 | bitvec_write_field(dest, wp,0x1,2); // Payload Type |
| 162 | bitvec_write_field(dest, wp,0x0,2); // Uplink block with TDMA framenumber |
| 163 | bitvec_write_field(dest, wp,0x1,1); // Suppl/Polling Bit |
| 164 | bitvec_write_field(dest, wp,0x1,3); // Uplink state flag |
| 165 | bitvec_write_field(dest, wp,0x2,6); // MESSAGE TYPE |
| 166 | bitvec_write_field(dest, wp,0x0,2); // Page Mode |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 167 | |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 168 | bitvec_write_field(dest, wp,0x0,1); // switch PERSIST_LEVEL: off |
Ivan Kluchnikov | 0b450c1 | 2012-05-24 22:47:12 +0400 | [diff] [blame] | 169 | bitvec_write_field(dest, wp,0x0,1); // switch TFI : on |
| 170 | bitvec_write_field(dest, wp,0x0,1); // switch UPLINK TFI : on |
| 171 | bitvec_write_field(dest, wp,tfi-1,5); // TFI |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 172 | |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 173 | bitvec_write_field(dest, wp,0x0,1); // Message escape |
| 174 | bitvec_write_field(dest, wp,0x0,2); // Medium Access Method: Dynamic Allocation |
| 175 | bitvec_write_field(dest, wp,0x0,1); // RLC acknowledged mode |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 176 | |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 177 | bitvec_write_field(dest, wp,0x0,1); // the network establishes no new downlink TBF for the mobile station |
| 178 | bitvec_write_field(dest, wp,0x1,8); // timeslot 7 |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 179 | |
Ivan Kluchnikov | 0b450c1 | 2012-05-24 22:47:12 +0400 | [diff] [blame] | 180 | bitvec_write_field(dest, wp,0x1,1); // switch TIMING_ADVANCE_VALUE = on |
| 181 | bitvec_write_field(dest, wp,ta,6); // TIMING_ADVANCE_VALUE |
| 182 | bitvec_write_field(dest, wp,0x0,1); // switch TIMING_ADVANCE_INDEX = off |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 183 | |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 184 | bitvec_write_field(dest, wp,0x0,1); // switch POWER CONTROL = off |
| 185 | bitvec_write_field(dest, wp,0x1,1); // Frequency Parameters information elements = present |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 186 | |
Ivan Kluchnikov | 0b450c1 | 2012-05-24 22:47:12 +0400 | [diff] [blame] | 187 | bitvec_write_field(dest, wp,tsc,3); // Training Sequence Code (TSC) = 2 |
| 188 | bitvec_write_field(dest, wp,0x0,2); // ARFCN = present |
| 189 | bitvec_write_field(dest, wp,599,10); // ARFCN |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 190 | |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 191 | bitvec_write_field(dest, wp,0x1,1); // switch TFI : on |
| 192 | bitvec_write_field(dest, wp,tfi,5);// TFI |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 193 | |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 194 | bitvec_write_field(dest, wp,0x1,1); // Power Control Parameters IE = present |
| 195 | bitvec_write_field(dest, wp,0x0,4); // ALPHA power control parameter |
| 196 | bitvec_write_field(dest, wp,0x0,1); // switch GAMMA_TN0 = off |
| 197 | bitvec_write_field(dest, wp,0x0,1); // switch GAMMA_TN1 = off |
| 198 | bitvec_write_field(dest, wp,0x0,1); // switch GAMMA_TN2 = off |
| 199 | bitvec_write_field(dest, wp,0x0,1); // switch GAMMA_TN3 = off |
| 200 | bitvec_write_field(dest, wp,0x0,1); // switch GAMMA_TN4 = off |
| 201 | bitvec_write_field(dest, wp,0x0,1); // switch GAMMA_TN5 = off |
| 202 | bitvec_write_field(dest, wp,0x0,1); // switch GAMMA_TN6 = off |
| 203 | bitvec_write_field(dest, wp,0x1,1); // switch GAMMA_TN7 = on |
| 204 | bitvec_write_field(dest, wp,0x0,5); // GAMMA_TN7 |
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,0x0,1); // TBF Starting TIME IE not present |
| 207 | bitvec_write_field(dest, wp,0x0,1); // Measurement Mapping struct not present |
Ivan Kluchnikov | 0b450c1 | 2012-05-24 22:47:12 +0400 | [diff] [blame] | 208 | bitvec_write_field(dest, wp,0x0,1); |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 209 | } |
| 210 | |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 211 | 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] | 212 | { |
| 213 | // TODO We should use our implementation of encode RLC/MAC Control messages. |
| 214 | unsigned wp = 0; |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 215 | bitvec_write_field(dest, wp,0x1,2); // Payload Type |
| 216 | bitvec_write_field(dest, wp,0x0,2); // Uplink block with TDMA framenumber |
| 217 | bitvec_write_field(dest, wp,0x1,1); // Suppl/Polling Bit |
| 218 | bitvec_write_field(dest, wp,0x1,3); // Uplink state flag |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 219 | |
| 220 | |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 221 | bitvec_write_field(dest, wp,0xa,6); // MESSAGE TYPE |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 222 | |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 223 | bitvec_write_field(dest, wp,0x0,2); // Page Mode |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 224 | |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 225 | bitvec_write_field(dest, wp,0x0,1); // switch PERSIST_LEVEL: off |
| 226 | bitvec_write_field(dest, wp,0x2,2); // switch TLLI : on |
| 227 | bitvec_write_field(dest, wp,tlli,32); // TLLI |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 228 | |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 229 | bitvec_write_field(dest, wp,0x0,1); // Message escape |
| 230 | bitvec_write_field(dest, wp,0x0,2); // CHANNEL_CODING_COMMAND |
| 231 | bitvec_write_field(dest, wp,0x0,1); // TLLI_BLOCK_CHANNEL_CODING |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 232 | |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 233 | bitvec_write_field(dest, wp,0x1,1); // switch TIMING_ADVANCE_VALUE = on |
| 234 | bitvec_write_field(dest, wp,0x0,6); // TIMING_ADVANCE_VALUE |
| 235 | bitvec_write_field(dest, wp,0x0,1); // switch TIMING_ADVANCE_INDEX = off |
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); // Frequency Parameters = off |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 238 | |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 239 | bitvec_write_field(dest, wp,0x1,2); // Dynamic Allocation = off |
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); // Dynamic Allocation |
| 242 | bitvec_write_field(dest, wp,0x0,1); // P0 = off |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 243 | |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 244 | bitvec_write_field(dest, wp,0x1,1); // USF_GRANULARITY |
| 245 | bitvec_write_field(dest, wp,0x1,1); // switch TFI : on |
| 246 | bitvec_write_field(dest, wp,tfi,5);// TFI |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 247 | |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 248 | bitvec_write_field(dest, wp,0x0,1); // |
| 249 | bitvec_write_field(dest, wp,0x0,1); // TBF Starting Time = off |
| 250 | bitvec_write_field(dest, wp,0x0,1); // Timeslot Allocation |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 251 | |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 252 | bitvec_write_field(dest, wp,0x0,5); // USF_TN 0 - 4 |
| 253 | bitvec_write_field(dest, wp,0x1,1); // USF_TN 5 |
| 254 | bitvec_write_field(dest, wp,0x1,3); // USF_TN 5 |
| 255 | bitvec_write_field(dest, wp,0x0,2); // USF_TN 6 - 7 |
| 256 | // bitvec_write_field(dest, wp,0x0,1); // Measurement Mapping struct not present |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 257 | } |
| 258 | |
Ivan Kluchnikov | 5310d45 | 2012-04-17 22:00:31 +0400 | [diff] [blame] | 259 | |
| 260 | // GSM 04.08 9.1.18 Immediate assignment |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 261 | int write_immediate_assignment(bitvec * dest, uint8_t downlink, uint8_t ra, uint32_t fn, |
Ivan Kluchnikov | 5310d45 | 2012-04-17 22:00:31 +0400 | [diff] [blame] | 262 | uint8_t ta, uint8_t tfi = 0, uint32_t tlli = 0) |
| 263 | { |
| 264 | unsigned wp = 0; |
| 265 | |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 266 | bitvec_write_field(dest, wp,0x0,4); // Skip Indicator |
| 267 | bitvec_write_field(dest, wp,0x6,4); // Protocol Discriminator |
| 268 | bitvec_write_field(dest, wp,0x3F,8); // Immediate Assignment Message Type |
Ivan Kluchnikov | 5310d45 | 2012-04-17 22:00:31 +0400 | [diff] [blame] | 269 | |
| 270 | // 10.5.2.25b Dedicated mode or TBF |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 271 | bitvec_write_field(dest, wp,0x0,1); // spare |
| 272 | bitvec_write_field(dest, wp,0x0,1); // TMA : Two-message assignment: No meaning |
| 273 | bitvec_write_field(dest, wp,downlink,1); // Downlink : Downlink assignment to mobile in packet idle mode |
| 274 | 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] | 275 | |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 276 | bitvec_write_field(dest, wp,0x0,4); // Page Mode |
Ivan Kluchnikov | 5310d45 | 2012-04-17 22:00:31 +0400 | [diff] [blame] | 277 | |
| 278 | // GSM 04.08 10.5.2.25a Packet Channel Description |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 279 | bitvec_write_field(dest, wp,0x1,5); // Channel type |
| 280 | bitvec_write_field(dest, wp,(l1fh->fl1h)->channel_info.tn,3); // TN |
| 281 | bitvec_write_field(dest, wp,(l1fh->fl1h)->channel_info.tsc,3); // TSC |
| 282 | bitvec_write_field(dest, wp,0x0,3); // non-hopping RF channel configuraion |
| 283 | bitvec_write_field(dest, wp,(l1fh->fl1h)->channel_info.arfcn,10); // ARFCN |
Ivan Kluchnikov | 5310d45 | 2012-04-17 22:00:31 +0400 | [diff] [blame] | 284 | |
| 285 | //10.5.2.30 Request Reference |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 286 | bitvec_write_field(dest, wp,ra,8); // RA |
| 287 | bitvec_write_field(dest, wp,(fn / (26 * 51)) % 32,5); // T1' |
| 288 | bitvec_write_field(dest, wp,fn % 51,6); // T3 |
| 289 | bitvec_write_field(dest, wp,fn % 26,5); // T2 |
Ivan Kluchnikov | 5310d45 | 2012-04-17 22:00:31 +0400 | [diff] [blame] | 290 | |
| 291 | // 10.5.2.40 Timing Advance |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 292 | bitvec_write_field(dest, wp,0x0,2); // spare |
| 293 | bitvec_write_field(dest, wp,ta,6); // Timing Advance value |
Ivan Kluchnikov | 5310d45 | 2012-04-17 22:00:31 +0400 | [diff] [blame] | 294 | |
| 295 | // No mobile allocation in non-hopping systems. |
| 296 | // A zero-length LV. Just write L=0. |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 297 | bitvec_write_field(dest, wp,0,8); |
Ivan Kluchnikov | 5310d45 | 2012-04-17 22:00:31 +0400 | [diff] [blame] | 298 | |
| 299 | if (downlink) |
| 300 | { |
| 301 | // GSM 04.08 10.5.2.16 IA Rest Octets |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 302 | bitvec_write_field(dest, wp, 3, 2); // "HH" |
| 303 | bitvec_write_field(dest, wp, 1, 2); // "01" Packet Downlink Assignment |
| 304 | bitvec_write_field(dest, wp,tlli,32); // TLLI |
| 305 | bitvec_write_field(dest, wp,0x1,1); // switch TFI : on |
| 306 | bitvec_write_field(dest, wp,tfi,5); // TFI |
| 307 | bitvec_write_field(dest, wp,0x0,1); // RLC acknowledged mode |
| 308 | bitvec_write_field(dest, wp,0x0,1); // ALPHA = present |
| 309 | bitvec_write_field(dest, wp,0x0,5); // GAMMA power control parameter |
| 310 | bitvec_write_field(dest, wp,0x0,1); // Polling Bit |
| 311 | bitvec_write_field(dest, wp,0x1,1); // TA_VALID ??? |
| 312 | bitvec_write_field(dest, wp,0x1,1); // switch TIMING_ADVANCE_INDEX = on |
| 313 | bitvec_write_field(dest, wp,0x0,4); // TIMING_ADVANCE_INDEX |
| 314 | bitvec_write_field(dest, wp,0x0,1); // TBF Starting TIME present |
| 315 | bitvec_write_field(dest, wp,0x0,1); // P0 not present |
| 316 | bitvec_write_field(dest, wp,0x1,1); // P0 not present |
| 317 | bitvec_write_field(dest, wp,0xb,4); |
Ivan Kluchnikov | 5310d45 | 2012-04-17 22:00:31 +0400 | [diff] [blame] | 318 | } |
| 319 | else |
| 320 | { |
| 321 | // GMS 04.08 10.5.2.37b 10.5.2.16 |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 322 | bitvec_write_field(dest, wp, 3, 2); // "HH" |
| 323 | bitvec_write_field(dest, wp, 0, 2); // "0" Packet Uplink Assignment |
| 324 | bitvec_write_field(dest, wp, 1, 1); // Block Allocation : Not Single Block Allocation |
| 325 | bitvec_write_field(dest, wp, tfi, 5); // TFI_ASSIGNMENT Temporary Flow Identity |
| 326 | bitvec_write_field(dest, wp, 0, 1); // POLLING |
| 327 | bitvec_write_field(dest, wp, 0, 1); // ALLOCATION_TYPE: dynamic |
| 328 | bitvec_write_field(dest, wp, 1, 3); // USF |
| 329 | bitvec_write_field(dest, wp, 1, 1); // USF_GRANULARITY |
| 330 | bitvec_write_field(dest, wp, 0 , 1); // "0" power control: Not Present |
| 331 | bitvec_write_field(dest, wp, 0, 2); // CHANNEL_CODING_COMMAND |
| 332 | bitvec_write_field(dest, wp, 1, 1); // TLLI_BLOCK_CHANNEL_CODING |
| 333 | bitvec_write_field(dest, wp, 1 , 1); // "1" Alpha : Present |
| 334 | bitvec_write_field(dest, wp, 0, 4); // Alpha |
| 335 | bitvec_write_field(dest, wp, 0, 5); // Gamma |
| 336 | bitvec_write_field(dest, wp, 0, 1); // TIMING_ADVANCE_INDEX_FLAG |
| 337 | bitvec_write_field(dest, wp, 0, 1); // TBF_STARTING_TIME_FLAG |
Ivan Kluchnikov | 5310d45 | 2012-04-17 22:00:31 +0400 | [diff] [blame] | 338 | } |
| 339 | |
| 340 | if (wp%8) |
| 341 | return wp/8+1; |
| 342 | else |
| 343 | return wp/8; |
| 344 | } |
| 345 | |
| 346 | |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 347 | 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] | 348 | { |
Ivan Kluchnikov | 5310d45 | 2012-04-17 22:00:31 +0400 | [diff] [blame] | 349 | // GSM 04.08 10.5.2.16 |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 350 | unsigned wp = 0; |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 351 | bitvec_write_field(dest, wp, 3, 2); // "HH" |
| 352 | bitvec_write_field(dest, wp, 1, 2); // "01" Packet Downlink Assignment |
| 353 | bitvec_write_field(dest, wp,tlli,32); // TLLI |
| 354 | bitvec_write_field(dest, wp,0x1,1); // switch TFI : on |
| 355 | bitvec_write_field(dest, wp,tfi,5); // TFI |
| 356 | bitvec_write_field(dest, wp,0x0,1); // RLC acknowledged mode |
| 357 | bitvec_write_field(dest, wp,0x0,1); // ALPHA = present |
| 358 | bitvec_write_field(dest, wp,0x0,5); // GAMMA power control parameter |
| 359 | bitvec_write_field(dest, wp,0x0,1); // Polling Bit |
| 360 | bitvec_write_field(dest, wp,0x1,1); // TA_VALID ??? |
| 361 | bitvec_write_field(dest, wp,0x1,1); // switch TIMING_ADVANCE_INDEX = on |
| 362 | bitvec_write_field(dest, wp,0x0,4); // TIMING_ADVANCE_INDEX |
| 363 | bitvec_write_field(dest, wp,0x0,1); // TBF Starting TIME present |
| 364 | bitvec_write_field(dest, wp,0x0,1); // P0 not present |
| 365 | bitvec_write_field(dest, wp,0x1,1); // P0 not present |
| 366 | bitvec_write_field(dest, wp,0xb,4); |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 367 | } |
| 368 | |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 369 | 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] | 370 | { |
| 371 | // TODO We should use our implementation of encode RLC/MAC Control messages. |
| 372 | unsigned wp = 0; |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 373 | bitvec_write_field(dest, wp,0x1,2); // payload |
| 374 | bitvec_write_field(dest, wp,0x0,2); // Uplink block with TDMA framenumber |
| 375 | if (cv == 0) bitvec_write_field(dest, wp,0x1,1); // Suppl/Polling Bit |
| 376 | else bitvec_write_field(dest, wp,0x0,1); //Suppl/Polling Bit |
| 377 | bitvec_write_field(dest, wp,0x1,3); // Uplink state flag |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 378 | |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 379 | //bitvec_write_field(dest, wp,0x0,1); // Reduced block sequence number |
| 380 | //bitvec_write_field(dest, wp,BSN+6,5); // Radio transaction identifier |
| 381 | //bitvec_write_field(dest, wp,0x1,1); // Final segment |
| 382 | //bitvec_write_field(dest, wp,0x1,1); // Address control |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 383 | |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 384 | //bitvec_write_field(dest, wp,0x0,2); // Power reduction: 0 |
| 385 | //bitvec_write_field(dest, wp,TFI,5); // Temporary flow identifier |
| 386 | //bitvec_write_field(dest, wp,0x1,1); // Direction |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 387 | |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 388 | bitvec_write_field(dest, wp,0x09,6); // MESSAGE TYPE |
| 389 | bitvec_write_field(dest, wp,0x0,2); // Page Mode |
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,0x0,2); |
| 392 | bitvec_write_field(dest, wp,tfi,5); // Uplink TFI |
| 393 | bitvec_write_field(dest, wp,0x0,1); |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 394 | |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 395 | bitvec_write_field(dest, wp,0x0,2); // CS1 |
| 396 | if (cv == 0) bitvec_write_field(dest, wp,0x1,1); // FINAL_ACK_INDICATION |
| 397 | else bitvec_write_field(dest, wp,0x0,1); // FINAL_ACK_INDICATION |
| 398 | bitvec_write_field(dest, wp,bsn + 1,7); // STARTING_SEQUENCE_NUMBER |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 399 | // RECEIVE_BLOCK_BITMAP |
| 400 | for (unsigned i=0; i<8; i++) { |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 401 | bitvec_write_field(dest, wp,0xff,8); |
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,0x1,1); // CONTENTION_RESOLUTION_TLLI = present |
| 404 | bitvec_write_field(dest, wp,tlli,8*4); |
| 405 | bitvec_write_field(dest, wp,0x00,4); //spare |
Ivan Kluchnikov | 0b450c1 | 2012-05-24 22:47:12 +0400 | [diff] [blame] | 406 | bitvec_write_field(dest, wp,0x5,4); //0101 |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 407 | } |
| 408 | |
| 409 | void gprs_rlcmac_tx_ul_ack(uint8_t tfi, uint32_t tlli, RlcMacUplinkDataBlock_t * ul_data_block) |
| 410 | { |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 411 | bitvec *packet_uplink_ack_vec = bitvec_alloc(23); |
| 412 | bitvec_unhex(packet_uplink_ack_vec, "2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b"); |
| 413 | 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] | 414 | 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] | 415 | RlcMacDownlink_t * packet_uplink_ack = (RlcMacDownlink_t *)malloc(sizeof(RlcMacDownlink_t)); |
Ivan Kluchnikov | a9f1ff2 | 2012-05-24 22:25:06 +0400 | [diff] [blame] | 416 | LOGP(DRLCMAC, LOGL_NOTICE, "+++++++++++++++++++++++++ TX : Packet Uplink Ack +++++++++++++++++++++++++\n"); |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 417 | decode_gsm_rlcmac_downlink(packet_uplink_ack_vec, packet_uplink_ack); |
Ivan Kluchnikov | a9f1ff2 | 2012-05-24 22:25:06 +0400 | [diff] [blame] | 418 | LOGPC(DRLCMAC, LOGL_NOTICE, "\n"); |
| 419 | LOGP(DRLCMAC, LOGL_NOTICE, "------------------------- TX : Packet Uplink Ack -------------------------\n"); |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 420 | free(packet_uplink_ack); |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 421 | pcu_l1if_tx(packet_uplink_ack_vec, GsmL1_Sapi_Pacch); |
| 422 | bitvec_free(packet_uplink_ack_vec); |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 423 | } |
| 424 | |
| 425 | void gprs_rlcmac_data_block_parse(gprs_rlcmac_tbf* tbf, RlcMacUplinkDataBlock_t * ul_data_block) |
| 426 | { |
| 427 | unsigned block_data_len = 0; |
| 428 | unsigned data_octet_num = 0; |
| 429 | |
| 430 | if (ul_data_block->E_1 == 0) // Extension octet follows immediately |
| 431 | { |
| 432 | // TODO We should implement case with several LLC PDU in one data block. |
| 433 | block_data_len = ul_data_block->LENGTH_INDICATOR[0]; |
| 434 | } |
| 435 | else |
| 436 | { |
| 437 | block_data_len = 20; // RLC data length without 3 header octets. |
| 438 | if(ul_data_block->TI == 1) // TLLI field is present |
| 439 | { |
| 440 | tbf->tlli = ul_data_block->TLLI; |
| 441 | block_data_len -= 4; // TLLI length |
| 442 | if (ul_data_block->PI == 1) // PFI is present if TI field indicates presence of TLLI |
| 443 | { |
| 444 | block_data_len -= 1; // PFI length |
| 445 | } |
| 446 | } |
| 447 | } |
| 448 | |
| 449 | for (unsigned i = tbf->data_index; i < tbf->data_index + block_data_len; i++) |
| 450 | { |
| 451 | tbf->rlc_data[i] = ul_data_block->RLC_DATA[data_octet_num]; |
| 452 | data_octet_num++; |
| 453 | } |
| 454 | tbf->data_index += block_data_len; |
| 455 | } |
| 456 | |
| 457 | /* Received Uplink RLC data block. */ |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 458 | int gprs_rlcmac_rcv_data_block(bitvec *rlc_block) |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 459 | { |
| 460 | struct gprs_rlcmac_tbf *tbf; |
| 461 | |
Ivan Kluchnikov | a9f1ff2 | 2012-05-24 22:25:06 +0400 | [diff] [blame] | 462 | LOGP(DRLCMAC, LOGL_NOTICE, "RX: [PCU <- BTS] Uplink Data Block\n"); |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 463 | RlcMacUplinkDataBlock_t * ul_data_block = (RlcMacUplinkDataBlock_t *)malloc(sizeof(RlcMacUplinkDataBlock_t)); |
Ivan Kluchnikov | a9f1ff2 | 2012-05-24 22:25:06 +0400 | [diff] [blame] | 464 | LOGP(DRLCMAC, LOGL_NOTICE, "+++++++++++++++++++++++++ RX : Uplink Data Block +++++++++++++++++++++++++\n"); |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 465 | decode_gsm_rlcmac_uplink_data(rlc_block, ul_data_block); |
Ivan Kluchnikov | a9f1ff2 | 2012-05-24 22:25:06 +0400 | [diff] [blame] | 466 | LOGP(DRLCMAC, LOGL_NOTICE, "------------------------- RX : Uplink Data Block -------------------------\n"); |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 467 | tbf = tbf_by_tfi(ul_data_block->TFI); |
| 468 | if (!tbf) { |
Ivan Kluchnikov | 5310d45 | 2012-04-17 22:00:31 +0400 | [diff] [blame] | 469 | return 0; |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 470 | } |
Ivan Kluchnikov | 9c795ab | 2012-05-24 23:12:59 +0400 | [diff] [blame] | 471 | tbf->tlli = ul_data_block->TLLI; |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 472 | |
| 473 | switch (tbf->state) { |
| 474 | case GPRS_RLCMAC_WAIT_DATA_SEQ_START: |
| 475 | if (ul_data_block->BSN == 0) { |
| 476 | tbf->data_index = 0; |
| 477 | gprs_rlcmac_data_block_parse(tbf, ul_data_block); |
| 478 | gprs_rlcmac_tx_ul_ack(tbf->tfi, tbf->tlli, ul_data_block); |
Ivan Kluchnikov | 9c795ab | 2012-05-24 23:12:59 +0400 | [diff] [blame] | 479 | if (ul_data_block->CV == 0) { |
| 480 | // Recieved last Data Block in this sequence. |
| 481 | gsmtap_send_llc(tbf->rlc_data, tbf->data_index); |
| 482 | tbf->state = GPRS_RLCMAC_WAIT_NEXT_DATA_SEQ; |
| 483 | gprs_rlcmac_tx_ul_ud(tbf); |
| 484 | } else { |
| 485 | tbf->bsn = ul_data_block->BSN; |
| 486 | tbf->state = GPRS_RLCMAC_WAIT_NEXT_DATA_BLOCK; |
| 487 | } |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 488 | } |
| 489 | break; |
| 490 | case GPRS_RLCMAC_WAIT_NEXT_DATA_BLOCK: |
| 491 | if (tbf->bsn == (ul_data_block->BSN - 1)) { |
| 492 | gprs_rlcmac_data_block_parse(tbf, ul_data_block); |
| 493 | gprs_rlcmac_tx_ul_ack(tbf->tfi, tbf->tlli, ul_data_block); |
| 494 | if (ul_data_block->CV == 0) { |
| 495 | // Recieved last Data Block in this sequence. |
| 496 | gsmtap_send_llc(tbf->rlc_data, tbf->data_index); |
| 497 | tbf->state = GPRS_RLCMAC_WAIT_NEXT_DATA_SEQ; |
Ivan Kluchnikov | 9c795ab | 2012-05-24 23:12:59 +0400 | [diff] [blame] | 498 | gprs_rlcmac_tx_ul_ud(tbf); |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 499 | } else { |
| 500 | tbf->bsn = ul_data_block->BSN; |
| 501 | tbf->state = GPRS_RLCMAC_WAIT_NEXT_DATA_BLOCK; |
| 502 | } |
| 503 | } else { |
| 504 | // Recieved Data Block with unexpected BSN. |
| 505 | // We should try to find nesessary Data Block. |
| 506 | tbf->state = GPRS_RLCMAC_WAIT_NEXT_DATA_BLOCK; |
| 507 | } |
| 508 | break; |
| 509 | case GPRS_RLCMAC_WAIT_NEXT_DATA_SEQ: |
| 510 | // Now we just ignore all Data Blocks and wait next Uplink TBF |
| 511 | break; |
| 512 | } |
| 513 | |
| 514 | free(ul_data_block); |
| 515 | return 1; |
| 516 | } |
| 517 | |
| 518 | /* Received Uplink RLC control block. */ |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 519 | int gprs_rlcmac_rcv_control_block(bitvec *rlc_block) |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 520 | { |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 521 | uint8_t tfi = 0; |
| 522 | uint32_t tlli = 0; |
| 523 | struct gprs_rlcmac_tbf *tbf; |
Ivan Kluchnikov | 9c795ab | 2012-05-24 23:12:59 +0400 | [diff] [blame] | 524 | struct gprs_rlcmac_tbf *ul_tbf; |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 525 | |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 526 | RlcMacUplink_t * ul_control_block = (RlcMacUplink_t *)malloc(sizeof(RlcMacUplink_t)); |
Ivan Kluchnikov | a9f1ff2 | 2012-05-24 22:25:06 +0400 | [diff] [blame] | 527 | LOGP(DRLCMAC, LOGL_NOTICE, "+++++++++++++++++++++++++ RX : Uplink Control Block +++++++++++++++++++++++++\n"); |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 528 | decode_gsm_rlcmac_uplink(rlc_block, ul_control_block); |
Ivan Kluchnikov | a9f1ff2 | 2012-05-24 22:25:06 +0400 | [diff] [blame] | 529 | LOGPC(DRLCMAC, LOGL_NOTICE, "\n"); |
| 530 | LOGP(DRLCMAC, LOGL_NOTICE, "------------------------- RX : Uplink Control Block -------------------------\n"); |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 531 | switch (ul_control_block->u.MESSAGE_TYPE) { |
| 532 | case MT_PACKET_CONTROL_ACK: |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 533 | tlli = ul_control_block->u.Packet_Control_Acknowledgement.TLLI; |
| 534 | tbf = tbf_by_tlli(tlli); |
| 535 | if (!tbf) { |
| 536 | return 0; |
| 537 | } |
Ivan Kluchnikov | 9c795ab | 2012-05-24 23:12:59 +0400 | [diff] [blame] | 538 | LOGP(DRLCMAC, LOGL_NOTICE, "RX: [PCU <- BTS] TFI: %u TLLI: 0x%08x Packet Control Ack\n", tbf->tfi, tbf->tlli); |
| 539 | 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] | 540 | tbf_free(tbf); |
| 541 | break; |
| 542 | case MT_PACKET_DOWNLINK_ACK_NACK: |
| 543 | tfi = ul_control_block->u.Packet_Downlink_Ack_Nack.DOWNLINK_TFI; |
| 544 | tbf = tbf_by_tfi(tfi); |
| 545 | if (!tbf) { |
| 546 | return 0; |
| 547 | } |
Ivan Kluchnikov | 9c795ab | 2012-05-24 23:12:59 +0400 | [diff] [blame] | 548 | LOGP(DRLCMAC, LOGL_NOTICE, "RX: [PCU <- BTS] TFI: %u TLLI: 0x%08x Packet Downlink Ack/Nack\n", tbf->tfi, tbf->tlli); |
| 549 | tlli = tbf->tlli; |
| 550 | LOGP(DRLCMAC, LOGL_NOTICE, "TBF: [DOWNLINK] END TFI: %u TLLI: 0x%08x \n", tbf->tfi, tbf->tlli); |
| 551 | tbf_free(tbf); |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 552 | break; |
| 553 | } |
| 554 | free(ul_control_block); |
| 555 | return 1; |
| 556 | } |
| 557 | |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 558 | void gprs_rlcmac_rcv_block(bitvec *rlc_block) |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 559 | { |
| 560 | unsigned readIndex = 0; |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 561 | unsigned payload = bitvec_read_field(rlc_block, readIndex, 2); |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 562 | |
| 563 | switch (payload) { |
| 564 | case GPRS_RLCMAC_DATA_BLOCK: |
| 565 | gprs_rlcmac_rcv_data_block(rlc_block); |
| 566 | break; |
| 567 | case GPRS_RLCMAC_CONTROL_BLOCK: |
| 568 | gprs_rlcmac_rcv_control_block(rlc_block); |
| 569 | break; |
| 570 | case GPRS_RLCMAC_CONTROL_BLOCK_OPT: |
| 571 | COUT("GPRS_RLCMAC_CONTROL_BLOCK_OPT block payload is not supported.\n"); |
| 572 | default: |
| 573 | COUT("Unknown RLCMAC block payload.\n"); |
| 574 | } |
| 575 | } |
| 576 | |
Ivan Kluchnikov | 5310d45 | 2012-04-17 22:00:31 +0400 | [diff] [blame] | 577 | int gprs_rlcmac_rcv_rach(uint8_t ra, uint32_t Fn, uint16_t ta) |
| 578 | { |
| 579 | struct gprs_rlcmac_tbf *tbf; |
| 580 | |
| 581 | // Create new TBF |
| 582 | int tfi = tfi_alloc(); |
| 583 | if (tfi < 0) { |
| 584 | return tfi; |
| 585 | } |
| 586 | tbf = tbf_alloc(tfi); |
| 587 | tbf->direction = GPRS_RLCMAC_UL_TBF; |
| 588 | tbf->state = GPRS_RLCMAC_WAIT_DATA_SEQ_START; |
Ivan Kluchnikov | a9f1ff2 | 2012-05-24 22:25:06 +0400 | [diff] [blame] | 589 | LOGP(DRLCMAC, LOGL_NOTICE, "TBF: [UPLINK] START TFI: %u\n", tbf->tfi); |
| 590 | LOGP(DRLCMAC, LOGL_NOTICE, "RX: [PCU <- BTS] TFI: %u RACH\n", tbf->tfi); |
| 591 | 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] | 592 | bitvec *immediate_assignment = bitvec_alloc(23); |
| 593 | bitvec_unhex(immediate_assignment, "2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b"); |
| 594 | int len = write_immediate_assignment(immediate_assignment, 0, ra, Fn, ta, tbf->tfi); |
| 595 | pcu_l1if_tx(immediate_assignment, GsmL1_Sapi_Agch, len); |
| 596 | bitvec_free(immediate_assignment); |
Ivan Kluchnikov | 5310d45 | 2012-04-17 22:00:31 +0400 | [diff] [blame] | 597 | } |
| 598 | |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 599 | // Send RLC data to OpenBTS. |
Ivan Kluchnikov | c320d86 | 2012-03-18 15:04:48 +0400 | [diff] [blame] | 600 | 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] | 601 | { |
| 602 | int spare_len = 0; |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 603 | bitvec *data_block_vector = bitvec_alloc(BLOCK_LEN); |
| 604 | bitvec_unhex(data_block_vector, "2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b"); |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 605 | RlcMacDownlinkDataBlock_t * data_block = (RlcMacDownlinkDataBlock_t *)malloc(sizeof(RlcMacDownlinkDataBlock_t)); |
| 606 | data_block->PAYLOAD_TYPE = 0; |
| 607 | data_block->RRBP = 0; |
| 608 | data_block->SP = 1; |
| 609 | data_block->USF = 1; |
| 610 | data_block->PR = 0; |
Ivan Kluchnikov | c320d86 | 2012-03-18 15:04:48 +0400 | [diff] [blame] | 611 | data_block->TFI = tfi; |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 612 | data_block->FBI = fbi; |
| 613 | data_block->BSN = bsn; |
Ivan Kluchnikov | a21f275 | 2012-05-24 22:35:19 +0400 | [diff] [blame] | 614 | if ((end_index - start_index) < 19) { |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 615 | data_block->E_1 = 0; |
| 616 | data_block->LENGTH_INDICATOR[0] = end_index-start_index; |
| 617 | data_block->M[0] = 0; |
| 618 | data_block->E[0] = 1; |
| 619 | spare_len = 19 - data_block->LENGTH_INDICATOR[0]; |
| 620 | } else { |
| 621 | data_block->E_1 = 1; |
| 622 | } |
| 623 | int j = 0; |
| 624 | int i = 0; |
| 625 | for(i = start_index; i < end_index; i++) { |
| 626 | data_block->RLC_DATA[j] = pdu[i]; |
| 627 | j++; |
| 628 | } |
| 629 | |
| 630 | for(i = j; i < j + spare_len; i++) { |
| 631 | data_block->RLC_DATA[i] = 0x2b; |
| 632 | } |
Ivan Kluchnikov | a9f1ff2 | 2012-05-24 22:25:06 +0400 | [diff] [blame] | 633 | LOGP(DRLCMAC, LOGL_NOTICE, "TX: [PCU -> BTS] Downlink Data Block\n"); |
| 634 | LOGP(DRLCMAC, LOGL_NOTICE, "+++++++++++++++++++++++++ TX : Downlink Data Block +++++++++++++++++++++++++\n"); |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 635 | encode_gsm_rlcmac_downlink_data(data_block_vector, data_block); |
Ivan Kluchnikov | a9f1ff2 | 2012-05-24 22:25:06 +0400 | [diff] [blame] | 636 | LOGP(DRLCMAC, LOGL_NOTICE, "------------------------- TX : Downlink Data Block -------------------------\n"); |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 637 | free(data_block); |
Ivan Kluchnikov | 835f91e | 2012-04-30 18:00:36 +0400 | [diff] [blame] | 638 | pcu_l1if_tx(data_block_vector, GsmL1_Sapi_Pdtch); |
| 639 | bitvec_free(data_block_vector); |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 640 | } |
| 641 | |
| 642 | int gprs_rlcmac_segment_llc_pdu(struct gprs_rlcmac_tbf *tbf) |
| 643 | { |
| 644 | int fbi = 0; |
| 645 | int num_blocks = 0; |
| 646 | int i; |
| 647 | |
| 648 | if (tbf->data_index > BLOCK_DATA_LEN + 1) |
| 649 | { |
| 650 | int block_data_len = BLOCK_DATA_LEN; |
| 651 | num_blocks = tbf->data_index/BLOCK_DATA_LEN; |
| 652 | int rest_len = tbf->data_index%BLOCK_DATA_LEN; |
| 653 | int start_index = 0; |
| 654 | int end_index = 0; |
| 655 | if (tbf->data_index%BLOCK_DATA_LEN > 0) |
| 656 | { |
| 657 | num_blocks++; |
| 658 | } |
| 659 | for (i = 0; i < num_blocks; i++) |
| 660 | { |
| 661 | if (i == num_blocks-1) |
| 662 | { |
| 663 | if (rest_len > 0) |
| 664 | { |
| 665 | block_data_len = rest_len; |
| 666 | } |
| 667 | fbi = 1; |
| 668 | } |
| 669 | end_index = start_index + block_data_len; |
Ivan Kluchnikov | c320d86 | 2012-03-18 15:04:48 +0400 | [diff] [blame] | 670 | gprs_rlcmac_tx_dl_data_block(tbf->tlli, tbf->tfi, tbf->rlc_data, start_index, end_index, i, fbi); |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 671 | start_index += block_data_len; |
| 672 | } |
| 673 | } |
| 674 | else |
| 675 | { |
Ivan Kluchnikov | c320d86 | 2012-03-18 15:04:48 +0400 | [diff] [blame] | 676 | gprs_rlcmac_tx_dl_data_block(tbf->tlli, tbf->tfi, tbf->rlc_data, 0, tbf->data_index, 0, 1); |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 677 | } |
| 678 | } |
| 679 | |
| 680 | /* Send Uplink unit-data to SGSN. */ |
| 681 | void gprs_rlcmac_tx_ul_ud(gprs_rlcmac_tbf *tbf) |
| 682 | { |
| 683 | const uint8_t qos_profile = QOS_PROFILE; |
| 684 | struct msgb *llc_pdu; |
| 685 | unsigned msg_len = NS_HDR_LEN + BSSGP_HDR_LEN + tbf->data_index; |
| 686 | |
Ivan Kluchnikov | a9f1ff2 | 2012-05-24 22:25:06 +0400 | [diff] [blame] | 687 | LOGP(DBSSGP, LOGL_DEBUG, "TX: [PCU -> SGSN ] TFI: %u TLLI: 0x%08x DataLen: %u", tbf->tfi, tbf->tlli, tbf->data_index); |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 688 | //for (unsigned i = 0; i < dataLen; i++) |
| 689 | // LOGP(DBSSGP, LOGL_DEBUG, " Data[%u] = %u", i, rlc_data[i]); |
Ivan Kluchnikov | c320d86 | 2012-03-18 15:04:48 +0400 | [diff] [blame] | 690 | |
| 691 | bctx->cell_id = CELL_ID; |
| 692 | bctx->nsei = NSEI; |
| 693 | bctx->ra_id.mnc = MNC; |
| 694 | bctx->ra_id.mcc = MCC; |
| 695 | bctx->ra_id.lac = PCU_LAC; |
| 696 | bctx->ra_id.rac = PCU_RAC; |
| 697 | bctx->bvci = BVCI; |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 698 | |
| 699 | llc_pdu = msgb_alloc_headroom(msg_len, msg_len,"llc_pdu"); |
| 700 | msgb_tvlv_push(llc_pdu, BSSGP_IE_LLC_PDU, sizeof(uint8_t)*tbf->data_index, tbf->rlc_data); |
| 701 | bssgp_tx_ul_ud(bctx, tbf->tlli, &qos_profile, llc_pdu); |
| 702 | } |
| 703 | |
Ivan Kluchnikov | c320d86 | 2012-03-18 15:04:48 +0400 | [diff] [blame] | 704 | void gprs_rlcmac_downlink_assignment(gprs_rlcmac_tbf *tbf) |
| 705 | { |
Ivan Kluchnikov | a9f1ff2 | 2012-05-24 22:25:06 +0400 | [diff] [blame] | 706 | 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] | 707 | bitvec *immediate_assignment = bitvec_alloc(23); |
| 708 | bitvec_unhex(immediate_assignment, "2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b"); |
| 709 | int len = write_immediate_assignment(immediate_assignment, 1, 125, get_current_fn(), (l1fh->fl1h)->channel_info.ta, tbf->tfi, tbf->tlli); |
| 710 | pcu_l1if_tx(immediate_assignment, GsmL1_Sapi_Agch, len); |
| 711 | bitvec_free(immediate_assignment); |
Ivan Kluchnikov | 61a33f7 | 2012-04-12 15:22:06 +0400 | [diff] [blame] | 712 | tbf_gsm_timer_start(tbf, 0, 120); |
Ivan Kluchnikov | c320d86 | 2012-03-18 15:04:48 +0400 | [diff] [blame] | 713 | } |
Ivan Kluchnikov | 9c795ab | 2012-05-24 23:12:59 +0400 | [diff] [blame] | 714 | |
| 715 | void gprs_rlcmac_packet_downlink_assignment(gprs_rlcmac_tbf *tbf) |
| 716 | { |
| 717 | LOGP(DRLCMAC, LOGL_NOTICE, "TX: [PCU -> BTS] TFI: %u TLLI: 0x%08x Packet DL Assignment\n", tbf->tfi, tbf->tlli); |
| 718 | bitvec *packet_downlink_assignment_vec = bitvec_alloc(23); |
| 719 | bitvec_unhex(packet_downlink_assignment_vec, "2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b"); |
| 720 | write_packet_downlink_assignment(packet_downlink_assignment_vec, tbf->tfi, tbf->tlli, (l1fh->fl1h)->channel_info.tn, |
| 721 | (l1fh->fl1h)->channel_info.ta, (l1fh->fl1h)->channel_info.tsc); |
| 722 | RlcMacDownlink_t * packet_downlink_assignment = (RlcMacDownlink_t *)malloc(sizeof(RlcMacDownlink_t)); |
| 723 | LOGP(DRLCMAC, LOGL_NOTICE, "+++++++++++++++++++++++++ TX : Packet Downlink Assignment +++++++++++++++++++++++++\n"); |
| 724 | decode_gsm_rlcmac_downlink(packet_downlink_assignment_vec, packet_downlink_assignment); |
| 725 | LOGPC(DRLCMAC, LOGL_NOTICE, "\n"); |
| 726 | LOGP(DRLCMAC, LOGL_NOTICE, "------------------------- TX : Packet Downlink Assignment -------------------------\n"); |
| 727 | free(packet_downlink_assignment); |
| 728 | pcu_l1if_tx(packet_downlink_assignment_vec, GsmL1_Sapi_Pacch); |
| 729 | bitvec_free(packet_downlink_assignment_vec); |
| 730 | tbf_gsm_timer_start(tbf, 0, 120); |
| 731 | } |