Holger Hans Peter Freyther | 17c31ce | 2013-08-24 18:31:27 +0200 | [diff] [blame] | 1 | /* Copied from gprs_bssgp_pcu.cpp |
| 2 | * |
| 3 | * Copyright (C) 2012 Ivan Klyuchnikov |
Holger Hans Peter Freyther | 8692128 | 2013-08-24 21:26:42 +0200 | [diff] [blame] | 4 | * Copyright (C) 2012 Andreas Eversberg <jolly@eversberg.eu> |
Holger Hans Peter Freyther | 17c31ce | 2013-08-24 18:31:27 +0200 | [diff] [blame] | 5 | * Copyright (C) 2013 by Holger Hans Peter Freyther |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or |
| 8 | * modify it under the terms of the GNU General Public License |
| 9 | * as published by the Free Software Foundation; either version 2 |
| 10 | * of the License, or (at your option) any later version. |
| 11 | * |
| 12 | * This program is distributed in the hope that it will be useful, |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | * GNU General Public License for more details. |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License |
| 18 | * along with this program; if not, write to the Free Software |
| 19 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| 20 | */ |
| 21 | |
Holger Hans Peter Freyther | 67ed34e | 2013-10-17 17:01:54 +0200 | [diff] [blame] | 22 | #include <bts.h> |
Holger Hans Peter Freyther | 17c31ce | 2013-08-24 18:31:27 +0200 | [diff] [blame] | 23 | #include <tbf.h> |
Holger Hans Peter Freyther | d11290b | 2013-10-26 17:32:04 +0200 | [diff] [blame^] | 24 | #include <rlc.h> |
Holger Hans Peter Freyther | 17c31ce | 2013-08-24 18:31:27 +0200 | [diff] [blame] | 25 | #include <gprs_rlcmac.h> |
| 26 | #include <gprs_debug.h> |
| 27 | |
| 28 | extern "C" { |
| 29 | #include <osmocom/core/msgb.h> |
Holger Hans Peter Freyther | 4556130 | 2013-10-16 17:55:57 +0200 | [diff] [blame] | 30 | #include <osmocom/core/talloc.h> |
Holger Hans Peter Freyther | 17c31ce | 2013-08-24 18:31:27 +0200 | [diff] [blame] | 31 | } |
| 32 | |
| 33 | #include <errno.h> |
| 34 | #include <string.h> |
| 35 | |
Holger Hans Peter Freyther | 1702f10 | 2013-10-20 08:44:02 +0200 | [diff] [blame] | 36 | extern "C" { |
| 37 | int bssgp_tx_llc_discarded(struct bssgp_bvc_ctx *bctx, uint32_t tlli, |
| 38 | uint8_t num_frames, uint32_t num_octets); |
| 39 | } |
| 40 | |
Holger Hans Peter Freyther | 7380bab | 2013-10-16 18:09:19 +0200 | [diff] [blame] | 41 | extern void *tall_pcu_ctx; |
| 42 | |
Holger Hans Peter Freyther | d1d114f | 2013-08-24 20:46:18 +0200 | [diff] [blame] | 43 | static inline void tbf_update_ms_class(struct gprs_rlcmac_tbf *tbf, |
| 44 | const uint8_t ms_class) |
| 45 | { |
| 46 | if (!tbf->ms_class && ms_class) |
| 47 | tbf->ms_class = ms_class; |
| 48 | } |
| 49 | |
Holger Hans Peter Freyther | d868928 | 2013-08-24 20:51:06 +0200 | [diff] [blame] | 50 | static inline void tbf_assign_imsi(struct gprs_rlcmac_tbf *tbf, |
| 51 | const char *imsi) |
| 52 | { |
| 53 | strncpy(tbf->meas.imsi, imsi, sizeof(tbf->meas.imsi) - 1); |
| 54 | } |
| 55 | |
Holger Hans Peter Freyther | 34bd8bd | 2013-10-19 21:10:38 +0200 | [diff] [blame] | 56 | static struct gprs_rlcmac_tbf *tbf_lookup_dl(BTS *bts, |
| 57 | const uint32_t tlli, const char *imsi) |
Holger Hans Peter Freyther | 31d0df9 | 2013-08-24 20:42:45 +0200 | [diff] [blame] | 58 | { |
| 59 | /* TODO: look up by IMSI first, then tlli, then old_tlli */ |
Holger Hans Peter Freyther | 34bd8bd | 2013-10-19 21:10:38 +0200 | [diff] [blame] | 60 | return bts->tbf_by_tlli(tlli, GPRS_RLCMAC_DL_TBF); |
Holger Hans Peter Freyther | 31d0df9 | 2013-08-24 20:42:45 +0200 | [diff] [blame] | 61 | } |
| 62 | |
| 63 | static int tbf_append_data(struct gprs_rlcmac_tbf *tbf, |
| 64 | struct gprs_rlcmac_bts *bts, |
| 65 | const uint8_t ms_class, |
| 66 | const uint16_t pdu_delay_csec, |
| 67 | const uint8_t *data, const uint16_t len) |
| 68 | { |
| 69 | LOGP(DRLCMAC, LOGL_INFO, "TBF: APPEND TFI: %u TLLI: 0x%08x\n", tbf->tfi, tbf->tlli); |
Holger Hans Peter Freyther | 1c344e2 | 2013-10-16 18:33:18 +0200 | [diff] [blame] | 70 | if (tbf->state_is(GPRS_RLCMAC_WAIT_RELEASE)) { |
Holger Hans Peter Freyther | 31d0df9 | 2013-08-24 20:42:45 +0200 | [diff] [blame] | 71 | LOGP(DRLCMAC, LOGL_DEBUG, "TBF in WAIT RELEASE state " |
| 72 | "(T3193), so reuse TBF\n"); |
| 73 | memcpy(tbf->llc_frame, data, len); |
| 74 | tbf->llc_length = len; |
| 75 | /* reset rlc states */ |
| 76 | memset(&tbf->dir.dl, 0, sizeof(tbf->dir.dl)); |
| 77 | /* keep to flags */ |
| 78 | tbf->state_flags &= GPRS_RLCMAC_FLAG_TO_MASK; |
| 79 | tbf->state_flags &= ~(1 << GPRS_RLCMAC_FLAG_CCCH); |
Holger Hans Peter Freyther | d1d114f | 2013-08-24 20:46:18 +0200 | [diff] [blame] | 80 | tbf_update_ms_class(tbf, ms_class); |
Holger Hans Peter Freyther | 9f0c1d2 | 2013-10-19 21:24:34 +0200 | [diff] [blame] | 81 | tbf_update(tbf); |
Holger Hans Peter Freyther | b65e08a | 2013-10-20 17:10:25 +0200 | [diff] [blame] | 82 | gprs_rlcmac_trigger_downlink_assignment(tbf, tbf, NULL); |
Holger Hans Peter Freyther | 31d0df9 | 2013-08-24 20:42:45 +0200 | [diff] [blame] | 83 | } else { |
| 84 | /* the TBF exists, so we must write it in the queue |
| 85 | * we prepend lifetime in front of PDU */ |
| 86 | struct timeval *tv; |
| 87 | struct msgb *llc_msg = msgb_alloc(len + sizeof(*tv), |
| 88 | "llc_pdu_queue"); |
| 89 | if (!llc_msg) |
| 90 | return -ENOMEM; |
| 91 | tv = (struct timeval *)msgb_put(llc_msg, sizeof(*tv)); |
| 92 | |
| 93 | uint16_t delay_csec; |
| 94 | if (bts->force_llc_lifetime) |
| 95 | delay_csec = bts->force_llc_lifetime; |
| 96 | else |
| 97 | delay_csec = pdu_delay_csec; |
| 98 | /* keep timestap at 0 for infinite delay */ |
| 99 | if (delay_csec != 0xffff) { |
| 100 | /* calculate timestamp of timeout */ |
| 101 | gettimeofday(tv, NULL); |
| 102 | tv->tv_usec += (delay_csec % 100) * 10000; |
| 103 | tv->tv_sec += delay_csec / 100; |
| 104 | if (tv->tv_usec > 999999) { |
| 105 | tv->tv_usec -= 1000000; |
| 106 | tv->tv_sec++; |
| 107 | } |
| 108 | } |
| 109 | memcpy(msgb_put(llc_msg, len), data, len); |
| 110 | msgb_enqueue(&tbf->llc_queue, llc_msg); |
Holger Hans Peter Freyther | d1d114f | 2013-08-24 20:46:18 +0200 | [diff] [blame] | 111 | tbf_update_ms_class(tbf, ms_class); |
Holger Hans Peter Freyther | 31d0df9 | 2013-08-24 20:42:45 +0200 | [diff] [blame] | 112 | } |
| 113 | |
| 114 | return 0; |
| 115 | } |
| 116 | |
Holger Hans Peter Freyther | 443c822 | 2013-08-24 20:59:46 +0200 | [diff] [blame] | 117 | static int tbf_new_dl_assignment(struct gprs_rlcmac_bts *bts, |
| 118 | const char *imsi, |
| 119 | const uint32_t tlli, const uint8_t ms_class, |
| 120 | const uint8_t *data, const uint16_t len) |
| 121 | { |
| 122 | uint8_t trx, ta, ss; |
| 123 | int8_t use_trx; |
| 124 | struct gprs_rlcmac_tbf *old_tbf, *tbf; |
| 125 | int8_t tfi; /* must be signed */ |
| 126 | int rc; |
| 127 | |
| 128 | /* check for uplink data, so we copy our informations */ |
Holger Hans Peter Freyther | bb20b2c | 2013-08-24 21:22:16 +0200 | [diff] [blame] | 129 | #warning "Do the same look up for IMSI, TLLI and OLD_TLLI" |
| 130 | #warning "Refactor the below lines... into a new method" |
Holger Hans Peter Freyther | 34bd8bd | 2013-10-19 21:10:38 +0200 | [diff] [blame] | 131 | tbf = bts->bts->tbf_by_tlli(tlli, GPRS_RLCMAC_UL_TBF); |
Holger Hans Peter Freyther | 443c822 | 2013-08-24 20:59:46 +0200 | [diff] [blame] | 132 | if (tbf && tbf->dir.ul.contention_resolution_done |
| 133 | && !tbf->dir.ul.final_ack_sent) { |
Holger Hans Peter Freyther | 96efa70 | 2013-09-29 07:44:39 +0200 | [diff] [blame] | 134 | use_trx = tbf->trx_no; |
Holger Hans Peter Freyther | 443c822 | 2013-08-24 20:59:46 +0200 | [diff] [blame] | 135 | ta = tbf->ta; |
| 136 | ss = 0; |
| 137 | old_tbf = tbf; |
| 138 | } else { |
| 139 | use_trx = -1; |
| 140 | /* we already have an uplink TBF, so we use that TA */ |
| 141 | if (tbf) |
| 142 | ta = tbf->ta; |
| 143 | else { |
| 144 | /* recall TA */ |
Holger Hans Peter Freyther | 111614a | 2013-10-19 20:04:57 +0200 | [diff] [blame] | 145 | rc = bts->bts->timing_advance()->recall(tlli); |
Holger Hans Peter Freyther | 443c822 | 2013-08-24 20:59:46 +0200 | [diff] [blame] | 146 | if (rc < 0) { |
| 147 | LOGP(DRLCMAC, LOGL_NOTICE, "TA unknown" |
| 148 | ", assuming 0\n"); |
| 149 | ta = 0; |
| 150 | } else |
| 151 | ta = rc; |
| 152 | } |
| 153 | ss = 1; /* PCH assignment only allows one timeslot */ |
| 154 | old_tbf = NULL; |
| 155 | } |
| 156 | |
| 157 | // Create new TBF (any TRX) |
Holger Hans Peter Freyther | bcafdf8 | 2013-08-24 21:13:31 +0200 | [diff] [blame] | 158 | #warning "Copy and paste with alloc_ul_tbf" |
Holger Hans Peter Freyther | 443c822 | 2013-08-24 20:59:46 +0200 | [diff] [blame] | 159 | tfi = tfi_find_free(bts, GPRS_RLCMAC_DL_TBF, &trx, use_trx); |
| 160 | if (tfi < 0) { |
| 161 | LOGP(DRLCMAC, LOGL_NOTICE, "No PDCH resource\n"); |
| 162 | /* FIXME: send reject */ |
| 163 | return -EBUSY; |
| 164 | } |
| 165 | /* set number of downlink slots according to multislot class */ |
| 166 | tbf = tbf_alloc(bts, tbf, GPRS_RLCMAC_DL_TBF, tfi, trx, ms_class, ss); |
| 167 | if (!tbf) { |
| 168 | LOGP(DRLCMAC, LOGL_NOTICE, "No PDCH ressource\n"); |
| 169 | /* FIXME: send reject */ |
| 170 | return -EBUSY; |
| 171 | } |
| 172 | tbf->tlli = tlli; |
| 173 | tbf->tlli_valid = 1; |
| 174 | tbf->ta = ta; |
| 175 | |
| 176 | LOGP(DRLCMAC, LOGL_DEBUG, |
| 177 | "TBF: [DOWNLINK] START TFI: %d TLLI: 0x%08x \n", |
| 178 | tbf->tfi, tbf->tlli); |
| 179 | |
| 180 | /* new TBF, so put first frame */ |
| 181 | memcpy(tbf->llc_frame, data, len); |
| 182 | tbf->llc_length = len; |
| 183 | |
| 184 | /* trigger downlink assignment and set state to ASSIGN. |
| 185 | * we don't use old_downlink, so the possible uplink is used |
| 186 | * to trigger downlink assignment. if there is no uplink, |
| 187 | * AGCH is used. */ |
Holger Hans Peter Freyther | b65e08a | 2013-10-20 17:10:25 +0200 | [diff] [blame] | 188 | gprs_rlcmac_trigger_downlink_assignment(tbf, old_tbf, imsi); |
Holger Hans Peter Freyther | 443c822 | 2013-08-24 20:59:46 +0200 | [diff] [blame] | 189 | |
| 190 | /* store IMSI for debugging purpose. TODO: it is more than debugging */ |
| 191 | tbf_assign_imsi(tbf, imsi); |
| 192 | return 0; |
| 193 | } |
| 194 | |
Holger Hans Peter Freyther | 17c31ce | 2013-08-24 18:31:27 +0200 | [diff] [blame] | 195 | /** |
| 196 | * TODO: split into unit test-able parts... |
| 197 | */ |
| 198 | int tbf_handle(struct gprs_rlcmac_bts *bts, |
| 199 | const uint32_t tlli, const char *imsi, |
Holger Hans Peter Freyther | 31d0df9 | 2013-08-24 20:42:45 +0200 | [diff] [blame] | 200 | const uint8_t ms_class, const uint16_t delay_csec, |
Holger Hans Peter Freyther | 17c31ce | 2013-08-24 18:31:27 +0200 | [diff] [blame] | 201 | const uint8_t *data, const uint16_t len) |
| 202 | { |
| 203 | struct gprs_rlcmac_tbf *tbf; |
Holger Hans Peter Freyther | 17c31ce | 2013-08-24 18:31:27 +0200 | [diff] [blame] | 204 | |
| 205 | /* check for existing TBF */ |
Holger Hans Peter Freyther | 34bd8bd | 2013-10-19 21:10:38 +0200 | [diff] [blame] | 206 | tbf = tbf_lookup_dl(bts->bts, tlli, imsi); |
Holger Hans Peter Freyther | 31d0df9 | 2013-08-24 20:42:45 +0200 | [diff] [blame] | 207 | if (tbf) { |
| 208 | int rc = tbf_append_data(tbf, bts, ms_class, |
| 209 | delay_csec, data, len); |
Holger Hans Peter Freyther | 443c822 | 2013-08-24 20:59:46 +0200 | [diff] [blame] | 210 | if (rc >= 0) |
| 211 | tbf_assign_imsi(tbf, imsi); |
| 212 | return rc; |
| 213 | } |
Holger Hans Peter Freyther | 17c31ce | 2013-08-24 18:31:27 +0200 | [diff] [blame] | 214 | |
Holger Hans Peter Freyther | 443c822 | 2013-08-24 20:59:46 +0200 | [diff] [blame] | 215 | return tbf_new_dl_assignment(bts, imsi, tlli, ms_class, data, len); |
Holger Hans Peter Freyther | 17c31ce | 2013-08-24 18:31:27 +0200 | [diff] [blame] | 216 | } |
Holger Hans Peter Freyther | 8692128 | 2013-08-24 21:26:42 +0200 | [diff] [blame] | 217 | |
| 218 | struct gprs_rlcmac_tbf *tbf_alloc_ul(struct gprs_rlcmac_bts *bts, |
| 219 | int8_t use_trx, uint8_t ms_class, |
| 220 | uint32_t tlli, uint8_t ta, struct gprs_rlcmac_tbf *dl_tbf) |
| 221 | { |
| 222 | uint8_t trx; |
| 223 | struct gprs_rlcmac_tbf *tbf; |
| 224 | uint8_t tfi; |
| 225 | |
| 226 | #warning "Copy and paste with tbf_new_dl_assignment" |
| 227 | /* create new TBF, use sme TRX as DL TBF */ |
| 228 | tfi = tfi_find_free(bts, GPRS_RLCMAC_UL_TBF, &trx, use_trx); |
| 229 | if (tfi < 0) { |
| 230 | LOGP(DRLCMAC, LOGL_NOTICE, "No PDCH ressource\n"); |
| 231 | /* FIXME: send reject */ |
| 232 | return NULL; |
| 233 | } |
| 234 | /* use multislot class of downlink TBF */ |
| 235 | tbf = tbf_alloc(bts, dl_tbf, GPRS_RLCMAC_UL_TBF, tfi, trx, ms_class, 0); |
| 236 | if (!tbf) { |
| 237 | LOGP(DRLCMAC, LOGL_NOTICE, "No PDCH ressource\n"); |
| 238 | /* FIXME: send reject */ |
| 239 | return NULL; |
| 240 | } |
| 241 | tbf->tlli = tlli; |
| 242 | tbf->tlli_valid = 1; /* no contention resolution */ |
| 243 | tbf->dir.ul.contention_resolution_done = 1; |
| 244 | tbf->ta = ta; /* use current TA */ |
| 245 | tbf_new_state(tbf, GPRS_RLCMAC_ASSIGN); |
| 246 | tbf->state_flags |= (1 << GPRS_RLCMAC_FLAG_PACCH); |
| 247 | tbf_timer_start(tbf, 3169, bts->t3169, 0); |
| 248 | |
| 249 | return tbf; |
| 250 | } |
Holger Hans Peter Freyther | 964ddb6 | 2013-10-16 17:53:23 +0200 | [diff] [blame] | 251 | |
Holger Hans Peter Freyther | 4556130 | 2013-10-16 17:55:57 +0200 | [diff] [blame] | 252 | static void tbf_unlink_pdch(struct gprs_rlcmac_tbf *tbf) |
| 253 | { |
Holger Hans Peter Freyther | 4556130 | 2013-10-16 17:55:57 +0200 | [diff] [blame] | 254 | struct gprs_rlcmac_pdch *pdch; |
| 255 | int ts; |
| 256 | |
| 257 | if (tbf->direction == GPRS_RLCMAC_UL_TBF) { |
Holger Hans Peter Freyther | 173a240 | 2013-10-16 21:47:45 +0200 | [diff] [blame] | 258 | tbf->trx->ul_tbf[tbf->tfi] = NULL; |
Holger Hans Peter Freyther | 4556130 | 2013-10-16 17:55:57 +0200 | [diff] [blame] | 259 | for (ts = 0; ts < 8; ts++) { |
| 260 | pdch = tbf->pdch[ts]; |
| 261 | if (pdch) |
| 262 | pdch->ul_tbf[tbf->tfi] = NULL; |
| 263 | tbf->pdch[ts] = NULL; |
| 264 | } |
| 265 | } else { |
Holger Hans Peter Freyther | 173a240 | 2013-10-16 21:47:45 +0200 | [diff] [blame] | 266 | tbf->trx->dl_tbf[tbf->tfi] = NULL; |
Holger Hans Peter Freyther | 4556130 | 2013-10-16 17:55:57 +0200 | [diff] [blame] | 267 | for (ts = 0; ts < 8; ts++) { |
| 268 | pdch = tbf->pdch[ts]; |
| 269 | if (pdch) |
| 270 | pdch->dl_tbf[tbf->tfi] = NULL; |
| 271 | tbf->pdch[ts] = NULL; |
| 272 | } |
| 273 | } |
| 274 | } |
| 275 | |
| 276 | void tbf_free(struct gprs_rlcmac_tbf *tbf) |
| 277 | { |
| 278 | struct msgb *msg; |
| 279 | |
| 280 | /* Give final measurement report */ |
| 281 | gprs_rlcmac_rssi_rep(tbf); |
| 282 | gprs_rlcmac_lost_rep(tbf); |
| 283 | |
Holger Hans Peter Freyther | 34bd8bd | 2013-10-19 21:10:38 +0200 | [diff] [blame] | 284 | debug_diagram(tbf->bts, tbf->diag, "+---------------+"); |
| 285 | debug_diagram(tbf->bts, tbf->diag, "| THE END |"); |
| 286 | debug_diagram(tbf->bts, tbf->diag, "+---------------+"); |
Holger Hans Peter Freyther | 4556130 | 2013-10-16 17:55:57 +0200 | [diff] [blame] | 287 | LOGP(DRLCMAC, LOGL_INFO, "Free %s TBF=%d with TLLI=0x%08x.\n", |
| 288 | (tbf->direction == GPRS_RLCMAC_UL_TBF) ? "UL" : "DL", tbf->tfi, |
| 289 | tbf->tlli); |
| 290 | if (tbf->ul_ass_state != GPRS_RLCMAC_UL_ASS_NONE) |
| 291 | LOGP(DRLCMAC, LOGL_ERROR, "Software error: Pending uplink " |
| 292 | "assignment. This may not happen, because the " |
| 293 | "assignment message never gets transmitted. Please " |
| 294 | "be shure not to free in this state. PLEASE FIX!\n"); |
| 295 | if (tbf->dl_ass_state != GPRS_RLCMAC_DL_ASS_NONE) |
| 296 | LOGP(DRLCMAC, LOGL_ERROR, "Software error: Pending downlink " |
| 297 | "assignment. This may not happen, because the " |
| 298 | "assignment message never gets transmitted. Please " |
| 299 | "be shure not to free in this state. PLEASE FIX!\n"); |
| 300 | tbf_timer_stop(tbf); |
| 301 | while ((msg = msgb_dequeue(&tbf->llc_queue))) |
| 302 | msgb_free(msg); |
| 303 | tbf_unlink_pdch(tbf); |
| 304 | llist_del(&tbf->list); |
| 305 | LOGP(DRLCMAC, LOGL_DEBUG, "********** TBF ends here **********\n"); |
| 306 | talloc_free(tbf); |
| 307 | } |
| 308 | |
Holger Hans Peter Freyther | 9f0c1d2 | 2013-10-19 21:24:34 +0200 | [diff] [blame] | 309 | int tbf_update(struct gprs_rlcmac_tbf *tbf) |
Holger Hans Peter Freyther | 4556130 | 2013-10-16 17:55:57 +0200 | [diff] [blame] | 310 | { |
Holger Hans Peter Freyther | 4556130 | 2013-10-16 17:55:57 +0200 | [diff] [blame] | 311 | struct gprs_rlcmac_tbf *ul_tbf = NULL; |
Holger Hans Peter Freyther | 9f0c1d2 | 2013-10-19 21:24:34 +0200 | [diff] [blame] | 312 | gprs_rlcmac_bts *bts = tbf->bts->bts_data(); |
Holger Hans Peter Freyther | 4556130 | 2013-10-16 17:55:57 +0200 | [diff] [blame] | 313 | int rc; |
| 314 | |
| 315 | LOGP(DRLCMAC, LOGL_DEBUG, "********** TBF update **********\n"); |
| 316 | |
| 317 | if (tbf->direction != GPRS_RLCMAC_DL_TBF) |
| 318 | return -EINVAL; |
| 319 | |
| 320 | if (!tbf->ms_class) { |
| 321 | LOGP(DRLCMAC, LOGL_DEBUG, "- Cannot update, no class\n"); |
| 322 | return -EINVAL; |
| 323 | } |
| 324 | |
Holger Hans Peter Freyther | 34bd8bd | 2013-10-19 21:10:38 +0200 | [diff] [blame] | 325 | ul_tbf = bts->bts->tbf_by_tlli(tbf->tlli, GPRS_RLCMAC_UL_TBF); |
Holger Hans Peter Freyther | 4556130 | 2013-10-16 17:55:57 +0200 | [diff] [blame] | 326 | |
| 327 | tbf_unlink_pdch(tbf); |
| 328 | rc = bts->alloc_algorithm(bts, ul_tbf, tbf, bts->alloc_algorithm_curst, 0); |
| 329 | /* if no ressource */ |
| 330 | if (rc < 0) { |
| 331 | LOGP(DRLCMAC, LOGL_ERROR, "No ressource after update???\n"); |
| 332 | return -rc; |
| 333 | } |
| 334 | |
| 335 | return 0; |
| 336 | } |
| 337 | |
| 338 | int tbf_assign_control_ts(struct gprs_rlcmac_tbf *tbf) |
| 339 | { |
| 340 | if (tbf->control_ts == 0xff) |
| 341 | LOGP(DRLCMAC, LOGL_INFO, "- Setting Control TS %d\n", |
| 342 | tbf->first_common_ts); |
| 343 | else if (tbf->control_ts != tbf->first_common_ts) |
| 344 | LOGP(DRLCMAC, LOGL_INFO, "- Changing Control TS %d\n", |
| 345 | tbf->first_common_ts); |
| 346 | tbf->control_ts = tbf->first_common_ts; |
| 347 | |
| 348 | return 0; |
| 349 | } |
| 350 | |
| 351 | static const char *tbf_state_name[] = { |
| 352 | "NULL", |
| 353 | "ASSIGN", |
| 354 | "FLOW", |
| 355 | "FINISHED", |
| 356 | "WAIT RELEASE", |
| 357 | "RELEASING", |
| 358 | }; |
| 359 | |
| 360 | void tbf_new_state(struct gprs_rlcmac_tbf *tbf, |
| 361 | enum gprs_rlcmac_tbf_state state) |
| 362 | { |
Holger Hans Peter Freyther | 34bd8bd | 2013-10-19 21:10:38 +0200 | [diff] [blame] | 363 | debug_diagram(tbf->bts, tbf->diag, "->%s", tbf_state_name[state]); |
Holger Hans Peter Freyther | 4556130 | 2013-10-16 17:55:57 +0200 | [diff] [blame] | 364 | LOGP(DRLCMAC, LOGL_DEBUG, "%s TBF=%d changes state from %s to %s\n", |
| 365 | (tbf->direction == GPRS_RLCMAC_UL_TBF) ? "UL" : "DL", tbf->tfi, |
| 366 | tbf_state_name[tbf->state], tbf_state_name[state]); |
Holger Hans Peter Freyther | 1c344e2 | 2013-10-16 18:33:18 +0200 | [diff] [blame] | 367 | tbf->set_state(state); |
Holger Hans Peter Freyther | 4556130 | 2013-10-16 17:55:57 +0200 | [diff] [blame] | 368 | } |
| 369 | |
| 370 | void tbf_timer_start(struct gprs_rlcmac_tbf *tbf, unsigned int T, |
| 371 | unsigned int seconds, unsigned int microseconds) |
| 372 | { |
| 373 | if (!osmo_timer_pending(&tbf->timer)) |
| 374 | LOGP(DRLCMAC, LOGL_DEBUG, "Starting %s TBF=%d timer %u.\n", |
| 375 | (tbf->direction == GPRS_RLCMAC_UL_TBF) ? "UL" : "DL", |
| 376 | tbf->tfi, T); |
| 377 | else |
| 378 | LOGP(DRLCMAC, LOGL_DEBUG, "Restarting %s TBF=%d timer %u " |
| 379 | "while old timer %u pending \n", |
| 380 | (tbf->direction == GPRS_RLCMAC_UL_TBF) ? "UL" : "DL", |
| 381 | tbf->tfi, T, tbf->T); |
| 382 | |
| 383 | tbf->T = T; |
| 384 | tbf->num_T_exp = 0; |
| 385 | |
| 386 | /* Tunning timers can be safely re-scheduled. */ |
| 387 | tbf->timer.data = tbf; |
| 388 | tbf->timer.cb = &tbf_timer_cb; |
| 389 | |
| 390 | osmo_timer_schedule(&tbf->timer, seconds, microseconds); |
| 391 | } |
| 392 | |
| 393 | void tbf_timer_stop(struct gprs_rlcmac_tbf *tbf) |
| 394 | { |
| 395 | if (osmo_timer_pending(&tbf->timer)) { |
| 396 | LOGP(DRLCMAC, LOGL_DEBUG, "Stopping %s TBF=%d timer %u.\n", |
| 397 | (tbf->direction == GPRS_RLCMAC_UL_TBF) ? "UL" : "DL", |
| 398 | tbf->tfi, tbf->T); |
| 399 | osmo_timer_del(&tbf->timer); |
| 400 | } |
| 401 | } |
| 402 | |
Holger Hans Peter Freyther | 7380bab | 2013-10-16 18:09:19 +0200 | [diff] [blame] | 403 | /* lookup TBF Entity (by TFI) */ |
| 404 | struct gprs_rlcmac_tbf *tbf_by_tfi(struct gprs_rlcmac_bts *bts, |
| 405 | uint8_t tfi, uint8_t trx, enum gprs_rlcmac_tbf_direction dir) |
| 406 | { |
| 407 | struct gprs_rlcmac_tbf *tbf; |
| 408 | |
| 409 | if (tfi >= 32 || trx >= 8) |
| 410 | return NULL; |
| 411 | |
| 412 | if (dir == GPRS_RLCMAC_UL_TBF) |
| 413 | tbf = bts->trx[trx].ul_tbf[tfi]; |
| 414 | else |
| 415 | tbf = bts->trx[trx].dl_tbf[tfi]; |
| 416 | if (!tbf) |
| 417 | return NULL; |
| 418 | |
Holger Hans Peter Freyther | 1c344e2 | 2013-10-16 18:33:18 +0200 | [diff] [blame] | 419 | if (tbf->state_is_not(GPRS_RLCMAC_RELEASING)) |
Holger Hans Peter Freyther | 7380bab | 2013-10-16 18:09:19 +0200 | [diff] [blame] | 420 | return tbf; |
| 421 | |
| 422 | return NULL; |
| 423 | } |
| 424 | |
Holger Hans Peter Freyther | 7380bab | 2013-10-16 18:09:19 +0200 | [diff] [blame] | 425 | struct gprs_rlcmac_tbf *tbf_alloc(struct gprs_rlcmac_bts *bts, |
| 426 | struct gprs_rlcmac_tbf *old_tbf, enum gprs_rlcmac_tbf_direction dir, |
| 427 | uint8_t tfi, uint8_t trx, |
| 428 | uint8_t ms_class, uint8_t single_slot) |
| 429 | { |
| 430 | struct gprs_rlcmac_tbf *tbf; |
| 431 | int rc; |
| 432 | |
| 433 | #ifdef DEBUG_DIAGRAM |
| 434 | /* hunt for first free number in diagram */ |
| 435 | int diagram_num; |
| 436 | for (diagram_num = 0; ; diagram_num++) { |
Holger Hans Peter Freyther | 34bd8bd | 2013-10-19 21:10:38 +0200 | [diff] [blame] | 437 | llist_for_each_entry(tbf, &bts->ul_tbfs, list) { |
Holger Hans Peter Freyther | 7380bab | 2013-10-16 18:09:19 +0200 | [diff] [blame] | 438 | if (tbf->diag == diagram_num) |
| 439 | goto next_diagram; |
| 440 | } |
Holger Hans Peter Freyther | 34bd8bd | 2013-10-19 21:10:38 +0200 | [diff] [blame] | 441 | llist_for_each_entry(tbf, &bts->dl_tbfs, list) { |
Holger Hans Peter Freyther | 7380bab | 2013-10-16 18:09:19 +0200 | [diff] [blame] | 442 | if (tbf->diag == diagram_num) |
| 443 | goto next_diagram; |
| 444 | } |
| 445 | break; |
| 446 | next_diagram: |
| 447 | continue; |
| 448 | } |
| 449 | #endif |
| 450 | |
| 451 | LOGP(DRLCMAC, LOGL_DEBUG, "********** TBF starts here **********\n"); |
| 452 | LOGP(DRLCMAC, LOGL_INFO, "Allocating %s TBF: TFI=%d TRX=%d " |
| 453 | "MS_CLASS=%d\n", (dir == GPRS_RLCMAC_UL_TBF) ? "UL" : "DL", |
| 454 | tfi, trx, ms_class); |
| 455 | |
| 456 | if (trx >= 8 || tfi >= 32) |
| 457 | return NULL; |
| 458 | |
| 459 | tbf = talloc_zero(tall_pcu_ctx, struct gprs_rlcmac_tbf); |
| 460 | if (!tbf) |
| 461 | return NULL; |
| 462 | |
Holger Hans Peter Freyther | 9f0c1d2 | 2013-10-19 21:24:34 +0200 | [diff] [blame] | 463 | tbf->bts = bts->bts; |
Holger Hans Peter Freyther | 7380bab | 2013-10-16 18:09:19 +0200 | [diff] [blame] | 464 | #ifdef DEBUG_DIAGRAM |
| 465 | tbf->diag = diagram_num; |
| 466 | #endif |
| 467 | tbf->direction = dir; |
| 468 | tbf->tfi = tfi; |
Holger Hans Peter Freyther | 96efa70 | 2013-09-29 07:44:39 +0200 | [diff] [blame] | 469 | tbf->trx_no = trx; |
Holger Hans Peter Freyther | 743bafa | 2013-09-29 07:50:50 +0200 | [diff] [blame] | 470 | tbf->trx = &bts->trx[trx]; |
Holger Hans Peter Freyther | 7380bab | 2013-10-16 18:09:19 +0200 | [diff] [blame] | 471 | tbf->arfcn = bts->trx[trx].arfcn; |
| 472 | tbf->ms_class = ms_class; |
| 473 | tbf->ws = 64; |
| 474 | tbf->sns = 128; |
| 475 | /* select algorithm */ |
| 476 | rc = bts->alloc_algorithm(bts, old_tbf, tbf, bts->alloc_algorithm_curst, |
| 477 | single_slot); |
| 478 | /* if no ressource */ |
| 479 | if (rc < 0) { |
| 480 | talloc_free(tbf); |
| 481 | return NULL; |
| 482 | } |
| 483 | /* assign control ts */ |
| 484 | tbf->control_ts = 0xff; |
| 485 | rc = tbf_assign_control_ts(tbf); |
| 486 | /* if no ressource */ |
| 487 | if (rc < 0) { |
| 488 | talloc_free(tbf); |
| 489 | return NULL; |
| 490 | } |
| 491 | |
| 492 | /* set timestamp */ |
| 493 | gettimeofday(&tbf->meas.dl_bw_tv, NULL); |
| 494 | gettimeofday(&tbf->meas.rssi_tv, NULL); |
| 495 | gettimeofday(&tbf->meas.dl_loss_tv, NULL); |
| 496 | |
| 497 | INIT_LLIST_HEAD(&tbf->llc_queue); |
| 498 | if (dir == GPRS_RLCMAC_UL_TBF) |
Holger Hans Peter Freyther | 34bd8bd | 2013-10-19 21:10:38 +0200 | [diff] [blame] | 499 | llist_add(&tbf->list, &bts->ul_tbfs); |
Holger Hans Peter Freyther | 7380bab | 2013-10-16 18:09:19 +0200 | [diff] [blame] | 500 | else |
Holger Hans Peter Freyther | 34bd8bd | 2013-10-19 21:10:38 +0200 | [diff] [blame] | 501 | llist_add(&tbf->list, &bts->dl_tbfs); |
Holger Hans Peter Freyther | 7380bab | 2013-10-16 18:09:19 +0200 | [diff] [blame] | 502 | |
Holger Hans Peter Freyther | 34bd8bd | 2013-10-19 21:10:38 +0200 | [diff] [blame] | 503 | debug_diagram(bts->bts, tbf->diag, "+-----------------+"); |
| 504 | debug_diagram(bts->bts, tbf->diag, "|NEW %s TBF TFI=%2d|", |
Holger Hans Peter Freyther | 7380bab | 2013-10-16 18:09:19 +0200 | [diff] [blame] | 505 | (dir == GPRS_RLCMAC_UL_TBF) ? "UL" : "DL", tfi); |
Holger Hans Peter Freyther | 34bd8bd | 2013-10-19 21:10:38 +0200 | [diff] [blame] | 506 | debug_diagram(bts->bts, tbf->diag, "+-----------------+"); |
Holger Hans Peter Freyther | 7380bab | 2013-10-16 18:09:19 +0200 | [diff] [blame] | 507 | |
| 508 | return tbf; |
| 509 | } |
| 510 | |
| 511 | void tbf_timer_cb(void *_tbf) |
| 512 | { |
| 513 | struct gprs_rlcmac_tbf *tbf = (struct gprs_rlcmac_tbf *)_tbf; |
| 514 | |
| 515 | LOGP(DRLCMAC, LOGL_DEBUG, "%s TBF=%d timer %u expired.\n", |
| 516 | (tbf->direction == GPRS_RLCMAC_UL_TBF) ? "UL" : "DL", tbf->tfi, |
| 517 | tbf->T); |
| 518 | |
| 519 | tbf->num_T_exp++; |
| 520 | |
| 521 | switch (tbf->T) { |
| 522 | #ifdef DEBUG_DL_ASS_IDLE |
| 523 | case 1234: |
| 524 | gprs_rlcmac_trigger_downlink_assignment(tbf, NULL, debug_imsi); |
| 525 | break; |
| 526 | #endif |
| 527 | case 0: /* assignment */ |
| 528 | if ((tbf->state_flags & (1 << GPRS_RLCMAC_FLAG_PACCH))) { |
Holger Hans Peter Freyther | 1c344e2 | 2013-10-16 18:33:18 +0200 | [diff] [blame] | 529 | if (tbf->state_is(GPRS_RLCMAC_ASSIGN)) { |
Holger Hans Peter Freyther | 7380bab | 2013-10-16 18:09:19 +0200 | [diff] [blame] | 530 | LOGP(DRLCMAC, LOGL_NOTICE, "Releasing due to " |
| 531 | "PACCH assignment timeout.\n"); |
| 532 | tbf_free(tbf); |
| 533 | } else |
| 534 | LOGP(DRLCMAC, LOGL_ERROR, "Error: TBF is not " |
| 535 | "in assign state\n"); |
| 536 | } |
| 537 | if ((tbf->state_flags & (1 << GPRS_RLCMAC_FLAG_CCCH))) { |
| 538 | /* change state to FLOW, so scheduler will start transmission */ |
| 539 | tbf->dir.dl.wait_confirm = 0; |
Holger Hans Peter Freyther | 1c344e2 | 2013-10-16 18:33:18 +0200 | [diff] [blame] | 540 | if (tbf->state_is(GPRS_RLCMAC_ASSIGN)) { |
Holger Hans Peter Freyther | 7380bab | 2013-10-16 18:09:19 +0200 | [diff] [blame] | 541 | tbf_new_state(tbf, GPRS_RLCMAC_FLOW); |
| 542 | tbf_assign_control_ts(tbf); |
| 543 | } else |
| 544 | LOGP(DRLCMAC, LOGL_NOTICE, "Continue flow after " |
| 545 | "IMM.ASS confirm\n"); |
| 546 | } |
| 547 | break; |
| 548 | case 3169: |
| 549 | case 3191: |
| 550 | case 3195: |
| 551 | LOGP(DRLCMAC, LOGL_NOTICE, "TBF T%d timeout during " |
| 552 | "transsmission\n", tbf->T); |
| 553 | tbf->rlcmac_diag(); |
| 554 | /* fall through */ |
| 555 | case 3193: |
| 556 | if (tbf->T == 3193) |
Holger Hans Peter Freyther | 34bd8bd | 2013-10-19 21:10:38 +0200 | [diff] [blame] | 557 | debug_diagram(tbf->bts, tbf->diag, "T3193 timeout"); |
Holger Hans Peter Freyther | 7380bab | 2013-10-16 18:09:19 +0200 | [diff] [blame] | 558 | LOGP(DRLCMAC, LOGL_DEBUG, "TBF will be freed due to timeout\n"); |
| 559 | /* free TBF */ |
| 560 | tbf_free(tbf); |
| 561 | break; |
| 562 | default: |
| 563 | LOGP(DRLCMAC, LOGL_ERROR, "Timer expired in unknown mode: %u\n", |
| 564 | tbf->T); |
| 565 | } |
| 566 | } |
| 567 | |
| 568 | int gprs_rlcmac_tbf::rlcmac_diag() |
| 569 | { |
| 570 | if ((state_flags & (1 << GPRS_RLCMAC_FLAG_CCCH))) |
| 571 | LOGP(DRLCMAC, LOGL_NOTICE, "- Assignment was on CCCH\n"); |
| 572 | if ((state_flags & (1 << GPRS_RLCMAC_FLAG_PACCH))) |
| 573 | LOGP(DRLCMAC, LOGL_NOTICE, "- Assignment was on PACCH\n"); |
| 574 | if ((state_flags & (1 << GPRS_RLCMAC_FLAG_UL_DATA))) |
| 575 | LOGP(DRLCMAC, LOGL_NOTICE, "- Uplink data was received\n"); |
| 576 | else if (direction == GPRS_RLCMAC_UL_TBF) |
| 577 | LOGP(DRLCMAC, LOGL_NOTICE, "- No uplink data received yet\n"); |
| 578 | if ((state_flags & (1 << GPRS_RLCMAC_FLAG_DL_ACK))) |
| 579 | LOGP(DRLCMAC, LOGL_NOTICE, "- Downlink ACK was received\n"); |
| 580 | else if (direction == GPRS_RLCMAC_DL_TBF) |
| 581 | LOGP(DRLCMAC, LOGL_NOTICE, "- No downlink ACK received yet\n"); |
| 582 | |
| 583 | return 0; |
| 584 | } |
| 585 | |
Holger Hans Peter Freyther | 1702f10 | 2013-10-20 08:44:02 +0200 | [diff] [blame] | 586 | struct msgb *gprs_rlcmac_tbf::llc_dequeue(bssgp_bvc_ctx *bctx) |
| 587 | { |
| 588 | struct msgb *msg; |
| 589 | struct timeval *tv, tv_now; |
| 590 | uint32_t octets = 0, frames = 0; |
| 591 | |
| 592 | gettimeofday(&tv_now, NULL); |
| 593 | |
| 594 | while ((msg = msgb_dequeue(&llc_queue))) { |
| 595 | tv = (struct timeval *)msg->data; |
| 596 | msgb_pull(msg, sizeof(*tv)); |
| 597 | if (tv->tv_sec /* not infinite */ |
| 598 | && (tv_now.tv_sec > tv->tv_sec /* and secs expired */ |
| 599 | || (tv_now.tv_sec == tv->tv_sec /* .. or if secs equal .. */ |
| 600 | && tv_now.tv_usec > tv->tv_usec))) { /* .. usecs expired */ |
| 601 | LOGP(DRLCMACDL, LOGL_NOTICE, "Discarding LLC PDU of " |
| 602 | "DL TBF=%d, because lifetime limit reached\n", |
| 603 | tfi); |
| 604 | frames++; |
| 605 | octets += msg->len; |
| 606 | msgb_free(msg); |
| 607 | continue; |
| 608 | } |
| 609 | break; |
| 610 | } |
| 611 | |
| 612 | if (frames) { |
| 613 | if (frames > 0xff) |
| 614 | frames = 0xff; |
| 615 | if (octets > 0xffffff) |
| 616 | octets = 0xffffff; |
| 617 | bssgp_tx_llc_discarded(bctx, tlli, frames, octets); |
| 618 | } |
| 619 | |
| 620 | return msg; |
| 621 | } |
| 622 | |
| 623 | void gprs_rlcmac_tbf::update_llc_frame(struct msgb *msg) |
| 624 | { |
| 625 | /* TODO: bounds check */ |
| 626 | memcpy(llc_frame, msg->data, msg->len); |
| 627 | llc_length = msg->len; |
| 628 | } |
| 629 | |
Holger Hans Peter Freyther | d11290b | 2013-10-26 17:32:04 +0200 | [diff] [blame^] | 630 | /* |
| 631 | * Store received block data in LLC message(s) and forward to SGSN |
| 632 | * if complete. |
| 633 | */ |
| 634 | int gprs_rlcmac_tbf::assemble_forward_llc(uint8_t *data, uint8_t len) |
| 635 | { |
| 636 | struct rlc_ul_header *rh = (struct rlc_ul_header *)data; |
| 637 | uint8_t e, m; |
| 638 | struct rlc_li_field *li; |
| 639 | uint8_t frame_offset[16], offset = 0, chunk; |
| 640 | int i, frames = 0; |
| 641 | |
| 642 | LOGP(DRLCMACUL, LOGL_DEBUG, "- Assembling frames: (len=%d)\n", len); |
| 643 | |
| 644 | data += 3; |
| 645 | len -= 3; |
| 646 | e = rh->e; /* if extended */ |
| 647 | m = 1; /* more frames, that means: the first frame */ |
| 648 | |
| 649 | /* Parse frame offsets from length indicator(s), if any. */ |
| 650 | while (1) { |
| 651 | if (frames == (int)sizeof(frame_offset)) { |
| 652 | LOGP(DRLCMACUL, LOGL_ERROR, "Too many frames in " |
| 653 | "block\n"); |
| 654 | return -EINVAL; |
| 655 | } |
| 656 | frame_offset[frames++] = offset; |
| 657 | LOGP(DRLCMACUL, LOGL_DEBUG, "-- Frame %d starts at offset " |
| 658 | "%d\n", frames, offset); |
| 659 | if (!len) |
| 660 | break; |
| 661 | /* M == 0 and E == 0 is not allowed in this version. */ |
| 662 | if (!m && !e) { |
| 663 | LOGP(DRLCMACUL, LOGL_NOTICE, "UL DATA TBF=%d " |
| 664 | "ignored, because M='0' and E='0'.\n", |
| 665 | this->tfi); |
| 666 | return 0; |
| 667 | } |
| 668 | /* no more frames in this segment */ |
| 669 | if (e) { |
| 670 | break; |
| 671 | } |
| 672 | /* There is a new frame and an LI that delimits it. */ |
| 673 | if (m) { |
| 674 | li = (struct rlc_li_field *)data; |
| 675 | LOGP(DRLCMACUL, LOGL_DEBUG, "-- Delimiter len=%d\n", |
| 676 | li->li); |
| 677 | /* Special case: LI == 0 |
| 678 | * If the last segment would fit precisely into the |
| 679 | * rest of the RLC MAC block, there would be no way |
| 680 | * to delimit that this segment ends and is not |
| 681 | * continued in the next block. |
| 682 | * The special LI (0) is used to force the segment to |
| 683 | * extend into the next block, so it is delimited there. |
| 684 | * This LI must be skipped. Also it is the last LI. |
| 685 | */ |
| 686 | if (li->li == 0) { |
| 687 | data++; |
| 688 | len--; |
| 689 | m = 1; /* M is ignored, we know there is more */ |
| 690 | break; /* handle E as '1', so we break! */ |
| 691 | } |
| 692 | e = li->e; |
| 693 | m = li->m; |
| 694 | offset += li->li; |
| 695 | data++; |
| 696 | len--; |
| 697 | continue; |
| 698 | } |
| 699 | } |
| 700 | if (!m) { |
| 701 | LOGP(DRLCMACUL, LOGL_DEBUG, "- Last frame carries spare " |
| 702 | "data\n"); |
| 703 | } |
| 704 | |
| 705 | LOGP(DRLCMACUL, LOGL_DEBUG, "- Data length after length fields: %d\n", |
| 706 | len); |
| 707 | /* TLLI */ |
| 708 | if (rh->ti) { |
| 709 | if (len < 4) { |
| 710 | LOGP(DRLCMACUL, LOGL_NOTICE, "UL DATA TLLI out of " |
| 711 | "frame border\n"); |
| 712 | return -EINVAL; |
| 713 | } |
| 714 | data += 4; |
| 715 | len -= 4; |
| 716 | LOGP(DRLCMACUL, LOGL_DEBUG, "- Length after skipping TLLI: " |
| 717 | "%d\n", len); |
| 718 | } |
| 719 | |
| 720 | /* PFI */ |
| 721 | if (rh->pi) { |
| 722 | LOGP(DRLCMACUL, LOGL_ERROR, "ERROR: PFI not supported, " |
| 723 | "please disable in SYSTEM INFORMATION\n"); |
| 724 | if (len < 1) { |
| 725 | LOGP(DRLCMACUL, LOGL_NOTICE, "UL DATA PFI out of " |
| 726 | "frame border\n"); |
| 727 | return -EINVAL; |
| 728 | } |
| 729 | data++; |
| 730 | len--; |
| 731 | LOGP(DRLCMACUL, LOGL_DEBUG, "- Length after skipping PFI: " |
| 732 | "%d\n", len); |
| 733 | } |
| 734 | |
| 735 | /* Now we have: |
| 736 | * - a list of frames offsets: frame_offset[] |
| 737 | * - number of frames: i |
| 738 | * - m == 0: Last frame carries spare data (end of TBF). |
| 739 | */ |
| 740 | |
| 741 | /* Check if last offset would exceed frame. */ |
| 742 | if (offset > len) { |
| 743 | LOGP(DRLCMACUL, LOGL_NOTICE, "UL DATA TBF=%d ignored, " |
| 744 | "because LI delimits data that exceeds block size.\n", |
| 745 | this->tfi); |
| 746 | return -EINVAL; |
| 747 | } |
| 748 | |
| 749 | /* create LLC frames */ |
| 750 | for (i = 0; i < frames; i++) { |
| 751 | /* last frame ? */ |
| 752 | if (i == frames - 1) { |
| 753 | /* no more data in last frame */ |
| 754 | if (!m) |
| 755 | break; |
| 756 | /* data until end of frame */ |
| 757 | chunk = len - frame_offset[i]; |
| 758 | } else { |
| 759 | /* data until next frame */ |
| 760 | chunk = frame_offset[i + 1] - frame_offset[i]; |
| 761 | } |
| 762 | LOGP(DRLCMACUL, LOGL_DEBUG, "-- Appending chunk (len=%d) to " |
| 763 | "frame at %d.\n", chunk, this->llc_index); |
| 764 | if (this->llc_index + chunk > LLC_MAX_LEN) { |
| 765 | LOGP(DRLCMACUL, LOGL_NOTICE, "LLC frame exceeds " |
| 766 | "maximum size.\n"); |
| 767 | chunk = LLC_MAX_LEN - this->llc_index; |
| 768 | } |
| 769 | memcpy(this->llc_frame + this->llc_index, data + frame_offset[i], |
| 770 | chunk); |
| 771 | this->llc_index += chunk; |
| 772 | /* not last frame. */ |
| 773 | if (i != frames - 1) { |
| 774 | /* send frame to SGSN */ |
| 775 | LOGP(DRLCMACUL, LOGL_INFO, "Complete UL frame for " |
| 776 | "TBF=%d: len=%d\n", this->tfi, this->llc_index); |
| 777 | gprs_rlcmac_tx_ul_ud(this); |
| 778 | this->llc_index = 0; /* reset frame space */ |
| 779 | /* also check if CV==0, because the frame may fill up the |
| 780 | * block precisely, then it is also complete. normally the |
| 781 | * frame would be extended into the next block with a 0-length |
| 782 | * delimiter added to this block. */ |
| 783 | } else if (rh->cv == 0) { |
| 784 | /* send frame to SGSN */ |
| 785 | LOGP(DRLCMACUL, LOGL_INFO, "Complete UL frame for " |
| 786 | "TBF=%d that fits precisely in last block: " |
| 787 | "len=%d\n", this->tfi, this->llc_index); |
| 788 | gprs_rlcmac_tx_ul_ud(this); |
| 789 | this->llc_index = 0; /* reset frame space */ |
| 790 | } |
| 791 | } |
| 792 | |
| 793 | return 0; |
| 794 | } |
| 795 | |
Holger Hans Peter Freyther | 964ddb6 | 2013-10-16 17:53:23 +0200 | [diff] [blame] | 796 | void gprs_rlcmac_tbf::free_all(struct gprs_rlcmac_trx *trx) |
| 797 | { |
| 798 | for (uint8_t tfi = 0; tfi < 32; tfi++) { |
| 799 | struct gprs_rlcmac_tbf *tbf; |
| 800 | |
| 801 | tbf = trx->ul_tbf[tfi]; |
| 802 | if (tbf) |
| 803 | tbf_free(tbf); |
| 804 | tbf = trx->dl_tbf[tfi]; |
| 805 | if (tbf) |
| 806 | tbf_free(tbf); |
| 807 | } |
| 808 | } |
Holger Hans Peter Freyther | 4f6a4e5d | 2013-10-16 17:58:46 +0200 | [diff] [blame] | 809 | |
| 810 | void gprs_rlcmac_tbf::free_all(struct gprs_rlcmac_pdch *pdch) |
| 811 | { |
| 812 | for (uint8_t tfi = 0; tfi < 32; tfi++) { |
| 813 | struct gprs_rlcmac_tbf *tbf; |
| 814 | |
| 815 | tbf = pdch->ul_tbf[tfi]; |
| 816 | if (tbf) |
| 817 | tbf_free(tbf); |
| 818 | tbf = pdch->dl_tbf[tfi]; |
| 819 | if (tbf) |
| 820 | tbf_free(tbf); |
| 821 | } |
| 822 | } |