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 | 2db7e7e | 2013-10-26 20:45:35 +0200 | [diff] [blame] | 25 | #include <encoding.h> |
Holger Hans Peter Freyther | 17c31ce | 2013-08-24 18:31:27 +0200 | [diff] [blame] | 26 | #include <gprs_rlcmac.h> |
| 27 | #include <gprs_debug.h> |
Holger Hans Peter Freyther | 3dc56a3 | 2013-10-26 21:38:30 +0200 | [diff] [blame] | 28 | #include <gprs_bssgp_pcu.h> |
Holger Hans Peter Freyther | 77e0597 | 2013-11-06 19:16:43 +0100 | [diff] [blame] | 29 | #include <decoding.h> |
Holger Hans Peter Freyther | 17c31ce | 2013-08-24 18:31:27 +0200 | [diff] [blame] | 30 | |
| 31 | extern "C" { |
| 32 | #include <osmocom/core/msgb.h> |
Holger Hans Peter Freyther | 4556130 | 2013-10-16 17:55:57 +0200 | [diff] [blame] | 33 | #include <osmocom/core/talloc.h> |
Holger Hans Peter Freyther | 17c31ce | 2013-08-24 18:31:27 +0200 | [diff] [blame] | 34 | } |
| 35 | |
| 36 | #include <errno.h> |
| 37 | #include <string.h> |
| 38 | |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 39 | /* After sending these frames, we poll for ack/nack. */ |
| 40 | #define POLL_ACK_AFTER_FRAMES 20 |
Holger Hans Peter Freyther | 77e0597 | 2013-11-06 19:16:43 +0100 | [diff] [blame] | 41 | /* After receiving these frames, we send ack/nack. */ |
| 42 | #define SEND_ACK_AFTER_FRAMES 20 |
| 43 | |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 44 | |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 45 | static const struct gprs_rlcmac_cs gprs_rlcmac_cs[] = { |
| 46 | /* frame length data block max payload */ |
| 47 | { 0, 0, 0 }, |
| 48 | { 23, 23, 20 }, /* CS-1 */ |
| 49 | { 34, 33, 30 }, /* CS-2 */ |
| 50 | { 40, 39, 36 }, /* CS-3 */ |
| 51 | { 54, 53, 50 }, /* CS-4 */ |
| 52 | }; |
| 53 | |
Holger Hans Peter Freyther | 1702f10 | 2013-10-20 08:44:02 +0200 | [diff] [blame] | 54 | extern "C" { |
| 55 | int bssgp_tx_llc_discarded(struct bssgp_bvc_ctx *bctx, uint32_t tlli, |
| 56 | uint8_t num_frames, uint32_t num_octets); |
| 57 | } |
| 58 | |
Holger Hans Peter Freyther | 7380bab | 2013-10-16 18:09:19 +0200 | [diff] [blame] | 59 | extern void *tall_pcu_ctx; |
| 60 | |
Holger Hans Peter Freyther | af8094d | 2013-10-26 17:56:15 +0200 | [diff] [blame] | 61 | static void tbf_timer_cb(void *_tbf); |
| 62 | |
Holger Hans Peter Freyther | d9262b3 | 2013-10-26 20:12:59 +0200 | [diff] [blame] | 63 | inline gprs_rlcmac_bts *gprs_rlcmac_tbf::bts_data() const |
| 64 | { |
| 65 | return bts->bts_data(); |
| 66 | } |
| 67 | |
Holger Hans Peter Freyther | d1d114f | 2013-08-24 20:46:18 +0200 | [diff] [blame] | 68 | static inline void tbf_update_ms_class(struct gprs_rlcmac_tbf *tbf, |
| 69 | const uint8_t ms_class) |
| 70 | { |
| 71 | if (!tbf->ms_class && ms_class) |
| 72 | tbf->ms_class = ms_class; |
| 73 | } |
| 74 | |
Holger Hans Peter Freyther | 5464c9b | 2013-10-27 20:57:35 +0100 | [diff] [blame] | 75 | void gprs_rlcmac_tbf::assign_imsi(const char *imsi) |
Holger Hans Peter Freyther | d868928 | 2013-08-24 20:51:06 +0200 | [diff] [blame] | 76 | { |
Holger Hans Peter Freyther | 5464c9b | 2013-10-27 20:57:35 +0100 | [diff] [blame] | 77 | strncpy(m_imsi, imsi, sizeof(m_imsi)); |
| 78 | m_imsi[sizeof(m_imsi) - 1] = '\0'; |
Holger Hans Peter Freyther | d868928 | 2013-08-24 20:51:06 +0200 | [diff] [blame] | 79 | } |
| 80 | |
Holger Hans Peter Freyther | 34bd8bd | 2013-10-19 21:10:38 +0200 | [diff] [blame] | 81 | static struct gprs_rlcmac_tbf *tbf_lookup_dl(BTS *bts, |
| 82 | const uint32_t tlli, const char *imsi) |
Holger Hans Peter Freyther | 31d0df9 | 2013-08-24 20:42:45 +0200 | [diff] [blame] | 83 | { |
| 84 | /* TODO: look up by IMSI first, then tlli, then old_tlli */ |
Daniel Willmann | b59d61b | 2014-07-02 17:58:14 +0200 | [diff] [blame] | 85 | return bts->dl_tbf_by_tlli(tlli); |
Holger Hans Peter Freyther | 31d0df9 | 2013-08-24 20:42:45 +0200 | [diff] [blame] | 86 | } |
| 87 | |
Holger Hans Peter Freyther | a1da251 | 2013-11-07 07:32:51 +0100 | [diff] [blame] | 88 | int gprs_rlcmac_tbf::append_data(const uint8_t ms_class, |
Holger Hans Peter Freyther | 31d0df9 | 2013-08-24 20:42:45 +0200 | [diff] [blame] | 89 | const uint16_t pdu_delay_csec, |
| 90 | const uint8_t *data, const uint16_t len) |
| 91 | { |
Holger Hans Peter Freyther | a1da251 | 2013-11-07 07:32:51 +0100 | [diff] [blame] | 92 | LOGP(DRLCMAC, LOGL_INFO, "%s append\n", tbf_name(this)); |
| 93 | if (state_is(GPRS_RLCMAC_WAIT_RELEASE)) { |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 94 | LOGP(DRLCMAC, LOGL_DEBUG, |
| 95 | "%s in WAIT RELEASE state " |
Holger Hans Peter Freyther | a1da251 | 2013-11-07 07:32:51 +0100 | [diff] [blame] | 96 | "(T3193), so reuse TBF\n", tbf_name(this)); |
Holger Hans Peter Freyther | a1da251 | 2013-11-07 07:32:51 +0100 | [diff] [blame] | 97 | tbf_update_ms_class(this, ms_class); |
Holger Hans Peter Freyther | 55cf994 | 2013-11-13 18:15:45 +0100 | [diff] [blame] | 98 | reuse_tbf(data, len); |
Holger Hans Peter Freyther | 31d0df9 | 2013-08-24 20:42:45 +0200 | [diff] [blame] | 99 | } else { |
| 100 | /* the TBF exists, so we must write it in the queue |
| 101 | * we prepend lifetime in front of PDU */ |
| 102 | struct timeval *tv; |
Daniel Willmann | 9c62389 | 2013-12-04 18:11:47 +0100 | [diff] [blame] | 103 | struct msgb *llc_msg = msgb_alloc(len + sizeof(*tv) * 2, |
Holger Hans Peter Freyther | 31d0df9 | 2013-08-24 20:42:45 +0200 | [diff] [blame] | 104 | "llc_pdu_queue"); |
| 105 | if (!llc_msg) |
| 106 | return -ENOMEM; |
| 107 | tv = (struct timeval *)msgb_put(llc_msg, sizeof(*tv)); |
Holger Hans Peter Freyther | fce431c | 2013-11-13 15:17:12 +0100 | [diff] [blame] | 108 | gprs_llc::calc_pdu_lifetime(bts, pdu_delay_csec, tv); |
Daniel Willmann | 9c62389 | 2013-12-04 18:11:47 +0100 | [diff] [blame] | 109 | tv = (struct timeval *)msgb_put(llc_msg, sizeof(*tv)); |
| 110 | gettimeofday(tv, NULL); |
Holger Hans Peter Freyther | 31d0df9 | 2013-08-24 20:42:45 +0200 | [diff] [blame] | 111 | memcpy(msgb_put(llc_msg, len), data, len); |
Holger Hans Peter Freyther | a1da251 | 2013-11-07 07:32:51 +0100 | [diff] [blame] | 112 | m_llc.enqueue(llc_msg); |
| 113 | tbf_update_ms_class(this, ms_class); |
Holger Hans Peter Freyther | 31d0df9 | 2013-08-24 20:42:45 +0200 | [diff] [blame] | 114 | } |
| 115 | |
| 116 | return 0; |
| 117 | } |
| 118 | |
Holger Hans Peter Freyther | 443c822 | 2013-08-24 20:59:46 +0200 | [diff] [blame] | 119 | static int tbf_new_dl_assignment(struct gprs_rlcmac_bts *bts, |
| 120 | const char *imsi, |
| 121 | const uint32_t tlli, const uint8_t ms_class, |
| 122 | const uint8_t *data, const uint16_t len) |
| 123 | { |
| 124 | uint8_t trx, ta, ss; |
| 125 | int8_t use_trx; |
| 126 | struct gprs_rlcmac_tbf *old_tbf, *tbf; |
| 127 | int8_t tfi; /* must be signed */ |
| 128 | int rc; |
| 129 | |
| 130 | /* check for uplink data, so we copy our informations */ |
Holger Hans Peter Freyther | bb20b2c | 2013-08-24 21:22:16 +0200 | [diff] [blame] | 131 | #warning "Do the same look up for IMSI, TLLI and OLD_TLLI" |
| 132 | #warning "Refactor the below lines... into a new method" |
Daniel Willmann | b59d61b | 2014-07-02 17:58:14 +0200 | [diff] [blame] | 133 | tbf = bts->bts->ul_tbf_by_tlli(tlli); |
Holger Hans Peter Freyther | 443c822 | 2013-08-24 20:59:46 +0200 | [diff] [blame] | 134 | if (tbf && tbf->dir.ul.contention_resolution_done |
| 135 | && !tbf->dir.ul.final_ack_sent) { |
Holger Hans Peter Freyther | ec80f82 | 2013-10-27 13:44:37 +0100 | [diff] [blame] | 136 | use_trx = tbf->trx->trx_no; |
Holger Hans Peter Freyther | 443c822 | 2013-08-24 20:59:46 +0200 | [diff] [blame] | 137 | ta = tbf->ta; |
| 138 | ss = 0; |
| 139 | old_tbf = tbf; |
| 140 | } else { |
| 141 | use_trx = -1; |
| 142 | /* we already have an uplink TBF, so we use that TA */ |
| 143 | if (tbf) |
| 144 | ta = tbf->ta; |
| 145 | else { |
| 146 | /* recall TA */ |
Holger Hans Peter Freyther | 111614a | 2013-10-19 20:04:57 +0200 | [diff] [blame] | 147 | rc = bts->bts->timing_advance()->recall(tlli); |
Holger Hans Peter Freyther | 443c822 | 2013-08-24 20:59:46 +0200 | [diff] [blame] | 148 | if (rc < 0) { |
| 149 | LOGP(DRLCMAC, LOGL_NOTICE, "TA unknown" |
| 150 | ", assuming 0\n"); |
| 151 | ta = 0; |
| 152 | } else |
| 153 | ta = rc; |
| 154 | } |
| 155 | ss = 1; /* PCH assignment only allows one timeslot */ |
| 156 | old_tbf = NULL; |
| 157 | } |
| 158 | |
| 159 | // Create new TBF (any TRX) |
Holger Hans Peter Freyther | bcafdf8 | 2013-08-24 21:13:31 +0200 | [diff] [blame] | 160 | #warning "Copy and paste with alloc_ul_tbf" |
Holger Hans Peter Freyther | 70ddde6 | 2013-10-26 19:17:58 +0200 | [diff] [blame] | 161 | tfi = bts->bts->tfi_find_free(GPRS_RLCMAC_DL_TBF, &trx, use_trx); |
Holger Hans Peter Freyther | 443c822 | 2013-08-24 20:59:46 +0200 | [diff] [blame] | 162 | if (tfi < 0) { |
| 163 | LOGP(DRLCMAC, LOGL_NOTICE, "No PDCH resource\n"); |
| 164 | /* FIXME: send reject */ |
| 165 | return -EBUSY; |
| 166 | } |
| 167 | /* set number of downlink slots according to multislot class */ |
Daniel Willmann | 48aa0b0 | 2014-07-16 18:54:10 +0200 | [diff] [blame] | 168 | tbf = tbf_alloc_dl_tbf(bts, tbf, tfi, trx, ms_class, ss); |
Holger Hans Peter Freyther | 443c822 | 2013-08-24 20:59:46 +0200 | [diff] [blame] | 169 | if (!tbf) { |
Holger Hans Peter Freyther | 90b87ea | 2013-10-27 10:38:31 +0100 | [diff] [blame] | 170 | LOGP(DRLCMAC, LOGL_NOTICE, "No PDCH resource\n"); |
Holger Hans Peter Freyther | 443c822 | 2013-08-24 20:59:46 +0200 | [diff] [blame] | 171 | /* FIXME: send reject */ |
| 172 | return -EBUSY; |
| 173 | } |
Holger Hans Peter Freyther | 474685e | 2013-10-27 17:01:14 +0100 | [diff] [blame] | 174 | tbf->m_tlli = tlli; |
| 175 | tbf->m_tlli_valid = 1; |
Holger Hans Peter Freyther | 443c822 | 2013-08-24 20:59:46 +0200 | [diff] [blame] | 176 | tbf->ta = ta; |
| 177 | |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 178 | LOGP(DRLCMAC, LOGL_DEBUG, "%s [DOWNLINK] START\n", tbf_name(tbf)); |
Holger Hans Peter Freyther | 443c822 | 2013-08-24 20:59:46 +0200 | [diff] [blame] | 179 | |
| 180 | /* new TBF, so put first frame */ |
Holger Hans Peter Freyther | 758dc12 | 2013-11-06 20:39:45 +0100 | [diff] [blame] | 181 | tbf->m_llc.put_frame(data, len); |
Holger Hans Peter Freyther | b3d5ee2 | 2013-11-13 16:43:26 +0100 | [diff] [blame] | 182 | tbf->bts->llc_frame_sched(); |
Holger Hans Peter Freyther | 443c822 | 2013-08-24 20:59:46 +0200 | [diff] [blame] | 183 | |
Holger Hans Peter Freyther | 5464c9b | 2013-10-27 20:57:35 +0100 | [diff] [blame] | 184 | /* Store IMSI for later look-up and PCH retransmission */ |
| 185 | tbf->assign_imsi(imsi); |
| 186 | |
Holger Hans Peter Freyther | 443c822 | 2013-08-24 20:59:46 +0200 | [diff] [blame] | 187 | /* trigger downlink assignment and set state to ASSIGN. |
| 188 | * we don't use old_downlink, so the possible uplink is used |
| 189 | * to trigger downlink assignment. if there is no uplink, |
| 190 | * AGCH is used. */ |
Holger Hans Peter Freyther | 24c1a5b | 2013-10-26 20:27:44 +0200 | [diff] [blame] | 191 | tbf->bts->trigger_dl_ass(tbf, old_tbf, imsi); |
Holger Hans Peter Freyther | 443c822 | 2013-08-24 20:59:46 +0200 | [diff] [blame] | 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 | */ |
Holger Hans Peter Freyther | a1da251 | 2013-11-07 07:32:51 +0100 | [diff] [blame] | 198 | int gprs_rlcmac_tbf::handle(struct gprs_rlcmac_bts *bts, |
Holger Hans Peter Freyther | 17c31ce | 2013-08-24 18:31:27 +0200 | [diff] [blame] | 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) { |
Holger Hans Peter Freyther | a1da251 | 2013-11-07 07:32:51 +0100 | [diff] [blame] | 208 | int rc = tbf->append_data(ms_class, delay_csec, data, len); |
Holger Hans Peter Freyther | 443c822 | 2013-08-24 20:59:46 +0200 | [diff] [blame] | 209 | if (rc >= 0) |
Holger Hans Peter Freyther | 5464c9b | 2013-10-27 20:57:35 +0100 | [diff] [blame] | 210 | tbf->assign_imsi(imsi); |
Holger Hans Peter Freyther | 443c822 | 2013-08-24 20:59:46 +0200 | [diff] [blame] | 211 | return rc; |
| 212 | } |
Holger Hans Peter Freyther | 17c31ce | 2013-08-24 18:31:27 +0200 | [diff] [blame] | 213 | |
Holger Hans Peter Freyther | 443c822 | 2013-08-24 20:59:46 +0200 | [diff] [blame] | 214 | 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] | 215 | } |
Holger Hans Peter Freyther | 8692128 | 2013-08-24 21:26:42 +0200 | [diff] [blame] | 216 | |
Daniel Willmann | 0d12a2f | 2014-07-10 17:44:07 +0200 | [diff] [blame] | 217 | gprs_rlcmac_ul_tbf *tbf_alloc_ul(struct gprs_rlcmac_bts *bts, |
Holger Hans Peter Freyther | 8692128 | 2013-08-24 21:26:42 +0200 | [diff] [blame] | 218 | int8_t use_trx, uint8_t ms_class, |
| 219 | uint32_t tlli, uint8_t ta, struct gprs_rlcmac_tbf *dl_tbf) |
| 220 | { |
| 221 | uint8_t trx; |
Daniel Willmann | 0d12a2f | 2014-07-10 17:44:07 +0200 | [diff] [blame] | 222 | struct gprs_rlcmac_ul_tbf *tbf; |
Holger Hans Peter Freyther | 5697b4c | 2013-11-11 16:22:39 +0100 | [diff] [blame] | 223 | int8_t tfi; /* must be signed */ |
Holger Hans Peter Freyther | 8692128 | 2013-08-24 21:26:42 +0200 | [diff] [blame] | 224 | |
| 225 | #warning "Copy and paste with tbf_new_dl_assignment" |
Holger Hans Peter Freyther | ba26368 | 2013-12-25 19:15:57 +0100 | [diff] [blame] | 226 | /* create new TBF, use same TRX as DL TBF */ |
Holger Hans Peter Freyther | 70ddde6 | 2013-10-26 19:17:58 +0200 | [diff] [blame] | 227 | tfi = bts->bts->tfi_find_free(GPRS_RLCMAC_UL_TBF, &trx, use_trx); |
Holger Hans Peter Freyther | 8692128 | 2013-08-24 21:26:42 +0200 | [diff] [blame] | 228 | if (tfi < 0) { |
Holger Hans Peter Freyther | 90b87ea | 2013-10-27 10:38:31 +0100 | [diff] [blame] | 229 | LOGP(DRLCMAC, LOGL_NOTICE, "No PDCH resource\n"); |
Holger Hans Peter Freyther | 8692128 | 2013-08-24 21:26:42 +0200 | [diff] [blame] | 230 | /* FIXME: send reject */ |
| 231 | return NULL; |
| 232 | } |
| 233 | /* use multislot class of downlink TBF */ |
Daniel Willmann | 48aa0b0 | 2014-07-16 18:54:10 +0200 | [diff] [blame] | 234 | tbf = tbf_alloc_ul_tbf(bts, dl_tbf, tfi, trx, ms_class, 0); |
Holger Hans Peter Freyther | 8692128 | 2013-08-24 21:26:42 +0200 | [diff] [blame] | 235 | if (!tbf) { |
Holger Hans Peter Freyther | 90b87ea | 2013-10-27 10:38:31 +0100 | [diff] [blame] | 236 | LOGP(DRLCMAC, LOGL_NOTICE, "No PDCH resource\n"); |
Holger Hans Peter Freyther | 8692128 | 2013-08-24 21:26:42 +0200 | [diff] [blame] | 237 | /* FIXME: send reject */ |
| 238 | return NULL; |
| 239 | } |
Holger Hans Peter Freyther | 474685e | 2013-10-27 17:01:14 +0100 | [diff] [blame] | 240 | tbf->m_tlli = tlli; |
| 241 | tbf->m_tlli_valid = 1; /* no contention resolution */ |
Holger Hans Peter Freyther | 8692128 | 2013-08-24 21:26:42 +0200 | [diff] [blame] | 242 | tbf->dir.ul.contention_resolution_done = 1; |
| 243 | tbf->ta = ta; /* use current TA */ |
| 244 | tbf_new_state(tbf, GPRS_RLCMAC_ASSIGN); |
| 245 | tbf->state_flags |= (1 << GPRS_RLCMAC_FLAG_PACCH); |
| 246 | tbf_timer_start(tbf, 3169, bts->t3169, 0); |
| 247 | |
| 248 | return tbf; |
| 249 | } |
Holger Hans Peter Freyther | 964ddb6 | 2013-10-16 17:53:23 +0200 | [diff] [blame] | 250 | |
Holger Hans Peter Freyther | 4556130 | 2013-10-16 17:55:57 +0200 | [diff] [blame] | 251 | static void tbf_unlink_pdch(struct gprs_rlcmac_tbf *tbf) |
| 252 | { |
Holger Hans Peter Freyther | 4556130 | 2013-10-16 17:55:57 +0200 | [diff] [blame] | 253 | int ts; |
| 254 | |
| 255 | if (tbf->direction == GPRS_RLCMAC_UL_TBF) { |
Holger Hans Peter Freyther | 34f6e5e | 2013-10-27 20:31:47 +0100 | [diff] [blame] | 256 | tbf->trx->ul_tbf[tbf->tfi()] = NULL; |
Daniel Willmann | 17a1d5e | 2014-05-30 20:21:30 +0200 | [diff] [blame] | 257 | for (ts = 0; ts < 8; ts++) |
Holger Hans Peter Freyther | 4556130 | 2013-10-16 17:55:57 +0200 | [diff] [blame] | 258 | tbf->pdch[ts] = NULL; |
Holger Hans Peter Freyther | 4556130 | 2013-10-16 17:55:57 +0200 | [diff] [blame] | 259 | } else { |
Holger Hans Peter Freyther | 34f6e5e | 2013-10-27 20:31:47 +0100 | [diff] [blame] | 260 | tbf->trx->dl_tbf[tbf->tfi()] = NULL; |
Daniel Willmann | 17a1d5e | 2014-05-30 20:21:30 +0200 | [diff] [blame] | 261 | for (ts = 0; ts < 8; ts++) |
Holger Hans Peter Freyther | 4556130 | 2013-10-16 17:55:57 +0200 | [diff] [blame] | 262 | tbf->pdch[ts] = NULL; |
Holger Hans Peter Freyther | 4556130 | 2013-10-16 17:55:57 +0200 | [diff] [blame] | 263 | } |
| 264 | } |
| 265 | |
| 266 | void tbf_free(struct gprs_rlcmac_tbf *tbf) |
| 267 | { |
Holger Hans Peter Freyther | 4556130 | 2013-10-16 17:55:57 +0200 | [diff] [blame] | 268 | /* Give final measurement report */ |
| 269 | gprs_rlcmac_rssi_rep(tbf); |
| 270 | gprs_rlcmac_lost_rep(tbf); |
| 271 | |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 272 | LOGP(DRLCMAC, LOGL_INFO, "%s free\n", tbf_name(tbf)); |
Holger Hans Peter Freyther | 4556130 | 2013-10-16 17:55:57 +0200 | [diff] [blame] | 273 | if (tbf->ul_ass_state != GPRS_RLCMAC_UL_ASS_NONE) |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 274 | LOGP(DRLCMAC, LOGL_ERROR, "%s Software error: Pending uplink " |
Holger Hans Peter Freyther | 4556130 | 2013-10-16 17:55:57 +0200 | [diff] [blame] | 275 | "assignment. This may not happen, because the " |
| 276 | "assignment message never gets transmitted. Please " |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 277 | "be sure not to free in this state. PLEASE FIX!\n", |
| 278 | tbf_name(tbf)); |
Holger Hans Peter Freyther | 4556130 | 2013-10-16 17:55:57 +0200 | [diff] [blame] | 279 | if (tbf->dl_ass_state != GPRS_RLCMAC_DL_ASS_NONE) |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 280 | LOGP(DRLCMAC, LOGL_ERROR, "%s Software error: Pending downlink " |
Holger Hans Peter Freyther | 4556130 | 2013-10-16 17:55:57 +0200 | [diff] [blame] | 281 | "assignment. This may not happen, because the " |
| 282 | "assignment message never gets transmitted. Please " |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 283 | "be sure not to free in this state. PLEASE FIX!\n", |
| 284 | tbf_name(tbf)); |
Holger Hans Peter Freyther | 86300bb | 2013-10-26 18:01:35 +0200 | [diff] [blame] | 285 | tbf->stop_timer(); |
Holger Hans Peter Freyther | 782f6dd | 2013-10-26 18:31:51 +0200 | [diff] [blame] | 286 | #warning "TODO: Could/Should generate bssgp_tx_llc_discarded" |
Holger Hans Peter Freyther | 758dc12 | 2013-11-06 20:39:45 +0100 | [diff] [blame] | 287 | tbf->m_llc.clear(tbf->bts); |
Holger Hans Peter Freyther | 4556130 | 2013-10-16 17:55:57 +0200 | [diff] [blame] | 288 | tbf_unlink_pdch(tbf); |
Daniel Willmann | 1b3864f | 2014-07-30 13:25:19 +0200 | [diff] [blame^] | 289 | llist_del(&tbf->list.list); |
Holger Hans Peter Freyther | 1587764 | 2013-10-27 09:50:15 +0100 | [diff] [blame] | 290 | |
| 291 | if (tbf->direction == GPRS_RLCMAC_UL_TBF) |
| 292 | tbf->bts->tbf_ul_freed(); |
| 293 | else |
| 294 | tbf->bts->tbf_dl_freed(); |
| 295 | |
Holger Hans Peter Freyther | 4556130 | 2013-10-16 17:55:57 +0200 | [diff] [blame] | 296 | LOGP(DRLCMAC, LOGL_DEBUG, "********** TBF ends here **********\n"); |
| 297 | talloc_free(tbf); |
| 298 | } |
| 299 | |
Holger Hans Peter Freyther | aa9c326 | 2013-10-26 17:49:36 +0200 | [diff] [blame] | 300 | int gprs_rlcmac_tbf::update() |
Holger Hans Peter Freyther | 4556130 | 2013-10-16 17:55:57 +0200 | [diff] [blame] | 301 | { |
Holger Hans Peter Freyther | 4556130 | 2013-10-16 17:55:57 +0200 | [diff] [blame] | 302 | struct gprs_rlcmac_tbf *ul_tbf = NULL; |
Holger Hans Peter Freyther | aa9c326 | 2013-10-26 17:49:36 +0200 | [diff] [blame] | 303 | struct gprs_rlcmac_bts *bts_data = bts->bts_data(); |
Holger Hans Peter Freyther | 4556130 | 2013-10-16 17:55:57 +0200 | [diff] [blame] | 304 | int rc; |
| 305 | |
| 306 | LOGP(DRLCMAC, LOGL_DEBUG, "********** TBF update **********\n"); |
| 307 | |
Holger Hans Peter Freyther | aa9c326 | 2013-10-26 17:49:36 +0200 | [diff] [blame] | 308 | if (direction != GPRS_RLCMAC_DL_TBF) |
Holger Hans Peter Freyther | 4556130 | 2013-10-16 17:55:57 +0200 | [diff] [blame] | 309 | return -EINVAL; |
| 310 | |
Daniel Willmann | b59d61b | 2014-07-02 17:58:14 +0200 | [diff] [blame] | 311 | ul_tbf = bts->ul_tbf_by_tlli(m_tlli); |
Holger Hans Peter Freyther | 4556130 | 2013-10-16 17:55:57 +0200 | [diff] [blame] | 312 | |
Holger Hans Peter Freyther | aa9c326 | 2013-10-26 17:49:36 +0200 | [diff] [blame] | 313 | tbf_unlink_pdch(this); |
| 314 | rc = bts_data->alloc_algorithm(bts_data, ul_tbf, this, bts_data->alloc_algorithm_curst, 0); |
Holger Hans Peter Freyther | 90b87ea | 2013-10-27 10:38:31 +0100 | [diff] [blame] | 315 | /* if no resource */ |
Holger Hans Peter Freyther | 4556130 | 2013-10-16 17:55:57 +0200 | [diff] [blame] | 316 | if (rc < 0) { |
Holger Hans Peter Freyther | 90b87ea | 2013-10-27 10:38:31 +0100 | [diff] [blame] | 317 | LOGP(DRLCMAC, LOGL_ERROR, "No resource after update???\n"); |
Holger Hans Peter Freyther | 4556130 | 2013-10-16 17:55:57 +0200 | [diff] [blame] | 318 | return -rc; |
| 319 | } |
| 320 | |
| 321 | return 0; |
| 322 | } |
| 323 | |
| 324 | int tbf_assign_control_ts(struct gprs_rlcmac_tbf *tbf) |
| 325 | { |
| 326 | if (tbf->control_ts == 0xff) |
| 327 | LOGP(DRLCMAC, LOGL_INFO, "- Setting Control TS %d\n", |
| 328 | tbf->first_common_ts); |
| 329 | else if (tbf->control_ts != tbf->first_common_ts) |
| 330 | LOGP(DRLCMAC, LOGL_INFO, "- Changing Control TS %d\n", |
| 331 | tbf->first_common_ts); |
| 332 | tbf->control_ts = tbf->first_common_ts; |
| 333 | |
| 334 | return 0; |
| 335 | } |
| 336 | |
| 337 | static const char *tbf_state_name[] = { |
| 338 | "NULL", |
| 339 | "ASSIGN", |
| 340 | "FLOW", |
| 341 | "FINISHED", |
| 342 | "WAIT RELEASE", |
| 343 | "RELEASING", |
| 344 | }; |
| 345 | |
| 346 | void tbf_new_state(struct gprs_rlcmac_tbf *tbf, |
| 347 | enum gprs_rlcmac_tbf_state state) |
| 348 | { |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 349 | LOGP(DRLCMAC, LOGL_DEBUG, "%s changes state from %s to %s\n", |
| 350 | tbf_name(tbf), |
Holger Hans Peter Freyther | 4556130 | 2013-10-16 17:55:57 +0200 | [diff] [blame] | 351 | tbf_state_name[tbf->state], tbf_state_name[state]); |
Holger Hans Peter Freyther | 1c344e2 | 2013-10-16 18:33:18 +0200 | [diff] [blame] | 352 | tbf->set_state(state); |
Holger Hans Peter Freyther | 4556130 | 2013-10-16 17:55:57 +0200 | [diff] [blame] | 353 | } |
| 354 | |
| 355 | void tbf_timer_start(struct gprs_rlcmac_tbf *tbf, unsigned int T, |
| 356 | unsigned int seconds, unsigned int microseconds) |
| 357 | { |
| 358 | if (!osmo_timer_pending(&tbf->timer)) |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 359 | LOGP(DRLCMAC, LOGL_DEBUG, "%s starting timer %u.\n", |
| 360 | tbf_name(tbf), T); |
Holger Hans Peter Freyther | 4556130 | 2013-10-16 17:55:57 +0200 | [diff] [blame] | 361 | else |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 362 | LOGP(DRLCMAC, LOGL_DEBUG, "%s restarting timer %u " |
Holger Hans Peter Freyther | 4556130 | 2013-10-16 17:55:57 +0200 | [diff] [blame] | 363 | "while old timer %u pending \n", |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 364 | tbf_name(tbf), T, tbf->T); |
Holger Hans Peter Freyther | 4556130 | 2013-10-16 17:55:57 +0200 | [diff] [blame] | 365 | |
| 366 | tbf->T = T; |
| 367 | tbf->num_T_exp = 0; |
| 368 | |
| 369 | /* Tunning timers can be safely re-scheduled. */ |
| 370 | tbf->timer.data = tbf; |
| 371 | tbf->timer.cb = &tbf_timer_cb; |
| 372 | |
| 373 | osmo_timer_schedule(&tbf->timer, seconds, microseconds); |
| 374 | } |
| 375 | |
Holger Hans Peter Freyther | 86300bb | 2013-10-26 18:01:35 +0200 | [diff] [blame] | 376 | void gprs_rlcmac_tbf::stop_t3191() |
Holger Hans Peter Freyther | 4556130 | 2013-10-16 17:55:57 +0200 | [diff] [blame] | 377 | { |
Holger Hans Peter Freyther | 86300bb | 2013-10-26 18:01:35 +0200 | [diff] [blame] | 378 | return stop_timer(); |
| 379 | } |
| 380 | |
| 381 | void gprs_rlcmac_tbf::stop_timer() |
| 382 | { |
| 383 | if (osmo_timer_pending(&timer)) { |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 384 | LOGP(DRLCMAC, LOGL_DEBUG, "%s stopping timer %u.\n", |
| 385 | tbf_name(this), T); |
Holger Hans Peter Freyther | 86300bb | 2013-10-26 18:01:35 +0200 | [diff] [blame] | 386 | osmo_timer_del(&timer); |
Holger Hans Peter Freyther | 4556130 | 2013-10-16 17:55:57 +0200 | [diff] [blame] | 387 | } |
| 388 | } |
| 389 | |
Holger Hans Peter Freyther | d9262b3 | 2013-10-26 20:12:59 +0200 | [diff] [blame] | 390 | void gprs_rlcmac_tbf::poll_timeout() |
| 391 | { |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 392 | LOGP(DRLCMAC, LOGL_NOTICE, "%s poll timeout\n", |
| 393 | tbf_name(this)); |
Holger Hans Peter Freyther | d9262b3 | 2013-10-26 20:12:59 +0200 | [diff] [blame] | 394 | |
| 395 | poll_state = GPRS_RLCMAC_POLL_NONE; |
| 396 | |
| 397 | if (ul_ack_state == GPRS_RLCMAC_UL_ACK_WAIT_ACK) { |
| 398 | if (!(state_flags & (1 << GPRS_RLCMAC_FLAG_TO_UL_ACK))) { |
| 399 | LOGP(DRLCMAC, LOGL_NOTICE, "- Timeout for polling " |
| 400 | "PACKET CONTROL ACK for PACKET UPLINK ACK\n"); |
| 401 | rlcmac_diag(); |
| 402 | state_flags |= (1 << GPRS_RLCMAC_FLAG_TO_UL_ACK); |
| 403 | } |
| 404 | ul_ack_state = GPRS_RLCMAC_UL_ACK_NONE; |
Holger Hans Peter Freyther | d9262b3 | 2013-10-26 20:12:59 +0200 | [diff] [blame] | 405 | if (state_is(GPRS_RLCMAC_FINISHED)) { |
| 406 | dir.ul.n3103++; |
| 407 | if (dir.ul.n3103 == bts->bts_data()->n3103) { |
| 408 | LOGP(DRLCMAC, LOGL_NOTICE, |
| 409 | "- N3103 exceeded\n"); |
Holger Hans Peter Freyther | d9262b3 | 2013-10-26 20:12:59 +0200 | [diff] [blame] | 410 | tbf_new_state(this, GPRS_RLCMAC_RELEASING); |
| 411 | tbf_timer_start(this, 3169, bts->bts_data()->t3169, 0); |
| 412 | return; |
| 413 | } |
| 414 | /* reschedule UL ack */ |
| 415 | ul_ack_state = GPRS_RLCMAC_UL_ACK_SEND_ACK; |
| 416 | } |
| 417 | } else if (ul_ass_state == GPRS_RLCMAC_UL_ASS_WAIT_ACK) { |
| 418 | if (!(state_flags & (1 << GPRS_RLCMAC_FLAG_TO_UL_ASS))) { |
| 419 | LOGP(DRLCMAC, LOGL_NOTICE, "- Timeout for polling " |
| 420 | "PACKET CONTROL ACK for PACKET UPLINK " |
| 421 | "ASSIGNMENT.\n"); |
| 422 | rlcmac_diag(); |
| 423 | state_flags |= (1 << GPRS_RLCMAC_FLAG_TO_UL_ASS); |
| 424 | } |
| 425 | ul_ass_state = GPRS_RLCMAC_UL_ASS_NONE; |
Holger Hans Peter Freyther | d9262b3 | 2013-10-26 20:12:59 +0200 | [diff] [blame] | 426 | n3105++; |
| 427 | if (n3105 == bts_data()->n3105) { |
| 428 | LOGP(DRLCMAC, LOGL_NOTICE, "- N3105 exceeded\n"); |
Holger Hans Peter Freyther | d9262b3 | 2013-10-26 20:12:59 +0200 | [diff] [blame] | 429 | tbf_new_state(this, GPRS_RLCMAC_RELEASING); |
| 430 | tbf_timer_start(this, 3195, bts_data()->t3195, 0); |
| 431 | return; |
| 432 | } |
| 433 | /* reschedule UL assignment */ |
| 434 | ul_ass_state = GPRS_RLCMAC_UL_ASS_SEND_ASS; |
| 435 | } else if (dl_ass_state == GPRS_RLCMAC_DL_ASS_WAIT_ACK) { |
| 436 | if (!(state_flags & (1 << GPRS_RLCMAC_FLAG_TO_DL_ASS))) { |
| 437 | LOGP(DRLCMAC, LOGL_NOTICE, "- Timeout for polling " |
| 438 | "PACKET CONTROL ACK for PACKET DOWNLINK " |
| 439 | "ASSIGNMENT.\n"); |
| 440 | rlcmac_diag(); |
| 441 | state_flags |= (1 << GPRS_RLCMAC_FLAG_TO_DL_ASS); |
| 442 | } |
| 443 | dl_ass_state = GPRS_RLCMAC_DL_ASS_NONE; |
Holger Hans Peter Freyther | d9262b3 | 2013-10-26 20:12:59 +0200 | [diff] [blame] | 444 | n3105++; |
| 445 | if (n3105 == bts->bts_data()->n3105) { |
| 446 | LOGP(DRLCMAC, LOGL_NOTICE, "- N3105 exceeded\n"); |
Holger Hans Peter Freyther | d9262b3 | 2013-10-26 20:12:59 +0200 | [diff] [blame] | 447 | tbf_new_state(this, GPRS_RLCMAC_RELEASING); |
| 448 | tbf_timer_start(this, 3195, bts_data()->t3195, 0); |
| 449 | return; |
| 450 | } |
| 451 | /* reschedule DL assignment */ |
| 452 | dl_ass_state = GPRS_RLCMAC_DL_ASS_SEND_ASS; |
| 453 | } else if (direction == GPRS_RLCMAC_DL_TBF) { |
| 454 | if (!(state_flags & (1 << GPRS_RLCMAC_FLAG_TO_DL_ACK))) { |
| 455 | LOGP(DRLCMAC, LOGL_NOTICE, "- Timeout for polling " |
| 456 | "PACKET DOWNLINK ACK.\n"); |
| 457 | rlcmac_diag(); |
| 458 | state_flags |= (1 << GPRS_RLCMAC_FLAG_TO_DL_ACK); |
| 459 | } |
Holger Hans Peter Freyther | d9262b3 | 2013-10-26 20:12:59 +0200 | [diff] [blame] | 460 | n3105++; |
| 461 | if (n3105 == bts->bts_data()->n3105) { |
| 462 | LOGP(DRLCMAC, LOGL_NOTICE, "- N3105 exceeded\n"); |
Holger Hans Peter Freyther | d9262b3 | 2013-10-26 20:12:59 +0200 | [diff] [blame] | 463 | tbf_new_state(this, GPRS_RLCMAC_RELEASING); |
| 464 | tbf_timer_start(this, 3195, bts_data()->t3195, 0); |
| 465 | return; |
| 466 | } |
| 467 | /* resend IMM.ASS on CCCH on timeout */ |
| 468 | if ((state_flags & (1 << GPRS_RLCMAC_FLAG_CCCH)) |
| 469 | && !(state_flags & (1 << GPRS_RLCMAC_FLAG_DL_ACK))) { |
| 470 | LOGP(DRLCMAC, LOGL_DEBUG, "Re-send dowlink assignment " |
Holger Hans Peter Freyther | 34f6e5e | 2013-10-27 20:31:47 +0100 | [diff] [blame] | 471 | "for %s on PCH (IMSI=%s)\n", |
| 472 | tbf_name(this), |
Holger Hans Peter Freyther | 5464c9b | 2013-10-27 20:57:35 +0100 | [diff] [blame] | 473 | m_imsi); |
Holger Hans Peter Freyther | d9262b3 | 2013-10-26 20:12:59 +0200 | [diff] [blame] | 474 | /* send immediate assignment */ |
Holger Hans Peter Freyther | 5464c9b | 2013-10-27 20:57:35 +0100 | [diff] [blame] | 475 | bts->snd_dl_ass(this, 0, m_imsi); |
Holger Hans Peter Freyther | d9262b3 | 2013-10-26 20:12:59 +0200 | [diff] [blame] | 476 | dir.dl.wait_confirm = 1; |
| 477 | } |
| 478 | } else |
| 479 | LOGP(DRLCMAC, LOGL_ERROR, "- Poll Timeout, but no event!\n"); |
| 480 | } |
| 481 | |
Daniel Willmann | 48aa0b0 | 2014-07-16 18:54:10 +0200 | [diff] [blame] | 482 | static int setup_tbf(struct gprs_rlcmac_tbf *tbf, struct gprs_rlcmac_bts *bts, |
| 483 | struct gprs_rlcmac_tbf *old_tbf, uint8_t tfi, uint8_t trx, |
Holger Hans Peter Freyther | 7380bab | 2013-10-16 18:09:19 +0200 | [diff] [blame] | 484 | uint8_t ms_class, uint8_t single_slot) |
| 485 | { |
Holger Hans Peter Freyther | 7380bab | 2013-10-16 18:09:19 +0200 | [diff] [blame] | 486 | int rc; |
| 487 | |
Holger Hans Peter Freyther | 7380bab | 2013-10-16 18:09:19 +0200 | [diff] [blame] | 488 | if (trx >= 8 || tfi >= 32) |
Daniel Willmann | 48aa0b0 | 2014-07-16 18:54:10 +0200 | [diff] [blame] | 489 | return -1; |
Daniel Willmann | 078bb71 | 2014-07-10 17:44:06 +0200 | [diff] [blame] | 490 | |
Holger Hans Peter Freyther | 7380bab | 2013-10-16 18:09:19 +0200 | [diff] [blame] | 491 | if (!tbf) |
Daniel Willmann | 48aa0b0 | 2014-07-16 18:54:10 +0200 | [diff] [blame] | 492 | return -1; |
Holger Hans Peter Freyther | 7380bab | 2013-10-16 18:09:19 +0200 | [diff] [blame] | 493 | |
Daniel Willmann | 1b3864f | 2014-07-30 13:25:19 +0200 | [diff] [blame^] | 494 | /* Back pointer for PODS llist compatibility */ |
| 495 | tbf->list.back = tbf; |
| 496 | |
Holger Hans Peter Freyther | a004799 | 2014-01-16 10:07:20 +0100 | [diff] [blame] | 497 | tbf->m_created_ts = time(NULL); |
Holger Hans Peter Freyther | 9f0c1d2 | 2013-10-19 21:24:34 +0200 | [diff] [blame] | 498 | tbf->bts = bts->bts; |
Holger Hans Peter Freyther | 34f6e5e | 2013-10-27 20:31:47 +0100 | [diff] [blame] | 499 | tbf->m_tfi = tfi; |
Holger Hans Peter Freyther | 743bafa | 2013-09-29 07:50:50 +0200 | [diff] [blame] | 500 | tbf->trx = &bts->trx[trx]; |
Holger Hans Peter Freyther | 7380bab | 2013-10-16 18:09:19 +0200 | [diff] [blame] | 501 | tbf->ms_class = ms_class; |
Holger Hans Peter Freyther | 7380bab | 2013-10-16 18:09:19 +0200 | [diff] [blame] | 502 | /* select algorithm */ |
| 503 | rc = bts->alloc_algorithm(bts, old_tbf, tbf, bts->alloc_algorithm_curst, |
| 504 | single_slot); |
Holger Hans Peter Freyther | 90b87ea | 2013-10-27 10:38:31 +0100 | [diff] [blame] | 505 | /* if no resource */ |
Holger Hans Peter Freyther | 7380bab | 2013-10-16 18:09:19 +0200 | [diff] [blame] | 506 | if (rc < 0) { |
Daniel Willmann | 48aa0b0 | 2014-07-16 18:54:10 +0200 | [diff] [blame] | 507 | return -1; |
Holger Hans Peter Freyther | 7380bab | 2013-10-16 18:09:19 +0200 | [diff] [blame] | 508 | } |
| 509 | /* assign control ts */ |
| 510 | tbf->control_ts = 0xff; |
| 511 | rc = tbf_assign_control_ts(tbf); |
Holger Hans Peter Freyther | 90b87ea | 2013-10-27 10:38:31 +0100 | [diff] [blame] | 512 | /* if no resource */ |
Holger Hans Peter Freyther | 7380bab | 2013-10-16 18:09:19 +0200 | [diff] [blame] | 513 | if (rc < 0) { |
Daniel Willmann | 48aa0b0 | 2014-07-16 18:54:10 +0200 | [diff] [blame] | 514 | return -1; |
Holger Hans Peter Freyther | 7380bab | 2013-10-16 18:09:19 +0200 | [diff] [blame] | 515 | } |
| 516 | |
| 517 | /* set timestamp */ |
| 518 | gettimeofday(&tbf->meas.dl_bw_tv, NULL); |
| 519 | gettimeofday(&tbf->meas.rssi_tv, NULL); |
| 520 | gettimeofday(&tbf->meas.dl_loss_tv, NULL); |
| 521 | |
Holger Hans Peter Freyther | 758dc12 | 2013-11-06 20:39:45 +0100 | [diff] [blame] | 522 | tbf->m_llc.init(); |
Daniel Willmann | 48aa0b0 | 2014-07-16 18:54:10 +0200 | [diff] [blame] | 523 | return 0; |
| 524 | } |
| 525 | |
| 526 | |
| 527 | struct gprs_rlcmac_ul_tbf *tbf_alloc_ul_tbf(struct gprs_rlcmac_bts *bts, |
| 528 | struct gprs_rlcmac_tbf *old_tbf, uint8_t tfi, uint8_t trx, |
| 529 | uint8_t ms_class, uint8_t single_slot) |
| 530 | { |
| 531 | struct gprs_rlcmac_ul_tbf *tbf; |
| 532 | int rc; |
| 533 | |
| 534 | LOGP(DRLCMAC, LOGL_DEBUG, "********** TBF starts here **********\n"); |
| 535 | LOGP(DRLCMAC, LOGL_INFO, "Allocating %s TBF: TFI=%d TRX=%d " |
| 536 | "MS_CLASS=%d\n", "UL", tfi, trx, ms_class); |
| 537 | |
| 538 | if (trx >= 8 || tfi >= 32) |
| 539 | return NULL; |
| 540 | |
| 541 | tbf = talloc_zero(tall_pcu_ctx, struct gprs_rlcmac_ul_tbf); |
| 542 | |
| 543 | if (!tbf) |
| 544 | return NULL; |
| 545 | |
| 546 | tbf->direction = GPRS_RLCMAC_UL_TBF; |
| 547 | rc = setup_tbf(tbf, bts, old_tbf, tfi, trx, ms_class, single_slot); |
| 548 | /* if no resource */ |
| 549 | if (rc < 0) { |
| 550 | talloc_free(tbf); |
| 551 | return NULL; |
Holger Hans Peter Freyther | 1587764 | 2013-10-27 09:50:15 +0100 | [diff] [blame] | 552 | } |
Holger Hans Peter Freyther | 7380bab | 2013-10-16 18:09:19 +0200 | [diff] [blame] | 553 | |
Daniel Willmann | 1b3864f | 2014-07-30 13:25:19 +0200 | [diff] [blame^] | 554 | llist_add(&tbf->list.list, &bts->ul_tbfs); |
Daniel Willmann | 48aa0b0 | 2014-07-16 18:54:10 +0200 | [diff] [blame] | 555 | tbf->bts->tbf_ul_created(); |
| 556 | |
| 557 | return tbf; |
| 558 | } |
| 559 | |
| 560 | struct gprs_rlcmac_dl_tbf *tbf_alloc_dl_tbf(struct gprs_rlcmac_bts *bts, |
| 561 | struct gprs_rlcmac_tbf *old_tbf, uint8_t tfi, uint8_t trx, |
| 562 | uint8_t ms_class, uint8_t single_slot) |
| 563 | { |
| 564 | struct gprs_rlcmac_dl_tbf *tbf; |
| 565 | int rc; |
| 566 | |
| 567 | LOGP(DRLCMAC, LOGL_DEBUG, "********** TBF starts here **********\n"); |
| 568 | LOGP(DRLCMAC, LOGL_INFO, "Allocating %s TBF: TFI=%d TRX=%d " |
| 569 | "MS_CLASS=%d\n", "DL", tfi, trx, ms_class); |
| 570 | |
| 571 | if (trx >= 8 || tfi >= 32) |
| 572 | return NULL; |
| 573 | |
| 574 | tbf = talloc_zero(tall_pcu_ctx, struct gprs_rlcmac_dl_tbf); |
| 575 | |
| 576 | if (!tbf) |
| 577 | return NULL; |
| 578 | |
| 579 | tbf->direction = GPRS_RLCMAC_DL_TBF; |
| 580 | rc = setup_tbf(tbf, bts, old_tbf, tfi, trx, ms_class, single_slot); |
| 581 | /* if no resource */ |
| 582 | if (rc < 0) { |
| 583 | talloc_free(tbf); |
| 584 | return NULL; |
| 585 | } |
| 586 | |
Daniel Willmann | 1b3864f | 2014-07-30 13:25:19 +0200 | [diff] [blame^] | 587 | llist_add(&tbf->list.list, &bts->dl_tbfs); |
Daniel Willmann | 48aa0b0 | 2014-07-16 18:54:10 +0200 | [diff] [blame] | 588 | tbf->bts->tbf_dl_created(); |
| 589 | |
Holger Hans Peter Freyther | 7380bab | 2013-10-16 18:09:19 +0200 | [diff] [blame] | 590 | return tbf; |
| 591 | } |
| 592 | |
Holger Hans Peter Freyther | af8094d | 2013-10-26 17:56:15 +0200 | [diff] [blame] | 593 | static void tbf_timer_cb(void *_tbf) |
Holger Hans Peter Freyther | 7380bab | 2013-10-16 18:09:19 +0200 | [diff] [blame] | 594 | { |
| 595 | struct gprs_rlcmac_tbf *tbf = (struct gprs_rlcmac_tbf *)_tbf; |
Holger Hans Peter Freyther | af8094d | 2013-10-26 17:56:15 +0200 | [diff] [blame] | 596 | tbf->handle_timeout(); |
| 597 | } |
Holger Hans Peter Freyther | 7380bab | 2013-10-16 18:09:19 +0200 | [diff] [blame] | 598 | |
Holger Hans Peter Freyther | af8094d | 2013-10-26 17:56:15 +0200 | [diff] [blame] | 599 | void gprs_rlcmac_tbf::handle_timeout() |
| 600 | { |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 601 | LOGP(DRLCMAC, LOGL_DEBUG, "%s timer %u expired.\n", |
| 602 | tbf_name(this), T); |
Holger Hans Peter Freyther | 7380bab | 2013-10-16 18:09:19 +0200 | [diff] [blame] | 603 | |
Holger Hans Peter Freyther | af8094d | 2013-10-26 17:56:15 +0200 | [diff] [blame] | 604 | num_T_exp++; |
Holger Hans Peter Freyther | 7380bab | 2013-10-16 18:09:19 +0200 | [diff] [blame] | 605 | |
Holger Hans Peter Freyther | af8094d | 2013-10-26 17:56:15 +0200 | [diff] [blame] | 606 | switch (T) { |
Holger Hans Peter Freyther | 7380bab | 2013-10-16 18:09:19 +0200 | [diff] [blame] | 607 | case 0: /* assignment */ |
Holger Hans Peter Freyther | af8094d | 2013-10-26 17:56:15 +0200 | [diff] [blame] | 608 | if ((state_flags & (1 << GPRS_RLCMAC_FLAG_PACCH))) { |
| 609 | if (state_is(GPRS_RLCMAC_ASSIGN)) { |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 610 | LOGP(DRLCMAC, LOGL_NOTICE, "%s releasing due to " |
| 611 | "PACCH assignment timeout.\n", tbf_name(this)); |
Holger Hans Peter Freyther | af8094d | 2013-10-26 17:56:15 +0200 | [diff] [blame] | 612 | tbf_free(this); |
Holger Hans Peter Freyther | 3d0cc2f | 2014-01-16 10:09:42 +0100 | [diff] [blame] | 613 | return; |
Holger Hans Peter Freyther | 7380bab | 2013-10-16 18:09:19 +0200 | [diff] [blame] | 614 | } else |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 615 | LOGP(DRLCMAC, LOGL_ERROR, "Error: %s is not " |
| 616 | "in assign state\n", tbf_name(this)); |
Holger Hans Peter Freyther | 7380bab | 2013-10-16 18:09:19 +0200 | [diff] [blame] | 617 | } |
Holger Hans Peter Freyther | af8094d | 2013-10-26 17:56:15 +0200 | [diff] [blame] | 618 | if ((state_flags & (1 << GPRS_RLCMAC_FLAG_CCCH))) { |
Holger Hans Peter Freyther | af8094d | 2013-10-26 17:56:15 +0200 | [diff] [blame] | 619 | dir.dl.wait_confirm = 0; |
| 620 | if (state_is(GPRS_RLCMAC_ASSIGN)) { |
Holger Hans Peter Freyther | af8094d | 2013-10-26 17:56:15 +0200 | [diff] [blame] | 621 | tbf_assign_control_ts(this); |
Daniel Willmann | cf1fae7 | 2014-05-30 17:58:01 +0200 | [diff] [blame] | 622 | |
| 623 | if (!upgrade_to_multislot) { |
| 624 | /* change state to FLOW, so scheduler |
| 625 | * will start transmission */ |
| 626 | tbf_new_state(this, GPRS_RLCMAC_FLOW); |
| 627 | break; |
| 628 | } |
| 629 | |
| 630 | /* This tbf can be upgraded to use multiple DL |
| 631 | * timeslots and now that there is already one |
| 632 | * slot assigned send another DL assignment via |
| 633 | * PDCH. */ |
| 634 | |
| 635 | /* keep to flags */ |
| 636 | state_flags &= GPRS_RLCMAC_FLAG_TO_MASK; |
| 637 | state_flags &= ~(1 << GPRS_RLCMAC_FLAG_CCCH); |
| 638 | |
| 639 | update(); |
| 640 | |
| 641 | bts->trigger_dl_ass(this, this, NULL); |
Holger Hans Peter Freyther | 7380bab | 2013-10-16 18:09:19 +0200 | [diff] [blame] | 642 | } else |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 643 | LOGP(DRLCMAC, LOGL_NOTICE, "%s Continue flow after " |
| 644 | "IMM.ASS confirm\n", tbf_name(this)); |
Holger Hans Peter Freyther | 7380bab | 2013-10-16 18:09:19 +0200 | [diff] [blame] | 645 | } |
| 646 | break; |
| 647 | case 3169: |
| 648 | case 3191: |
| 649 | case 3195: |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 650 | LOGP(DRLCMAC, LOGL_NOTICE, "%s T%d timeout during " |
| 651 | "transsmission\n", tbf_name(this), T); |
Holger Hans Peter Freyther | af8094d | 2013-10-26 17:56:15 +0200 | [diff] [blame] | 652 | rlcmac_diag(); |
Holger Hans Peter Freyther | 7380bab | 2013-10-16 18:09:19 +0200 | [diff] [blame] | 653 | /* fall through */ |
| 654 | case 3193: |
Holger Hans Peter Freyther | 8d0e489 | 2013-10-27 12:42:58 +0100 | [diff] [blame] | 655 | LOGP(DRLCMAC, LOGL_DEBUG, |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 656 | "%s will be freed due to timeout\n", tbf_name(this)); |
Holger Hans Peter Freyther | 7380bab | 2013-10-16 18:09:19 +0200 | [diff] [blame] | 657 | /* free TBF */ |
Holger Hans Peter Freyther | af8094d | 2013-10-26 17:56:15 +0200 | [diff] [blame] | 658 | tbf_free(this); |
Holger Hans Peter Freyther | 3d0cc2f | 2014-01-16 10:09:42 +0100 | [diff] [blame] | 659 | return; |
Holger Hans Peter Freyther | 7380bab | 2013-10-16 18:09:19 +0200 | [diff] [blame] | 660 | break; |
| 661 | default: |
Holger Hans Peter Freyther | 8d0e489 | 2013-10-27 12:42:58 +0100 | [diff] [blame] | 662 | LOGP(DRLCMAC, LOGL_ERROR, |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 663 | "%s timer expired in unknown mode: %u\n", tbf_name(this), T); |
Holger Hans Peter Freyther | 7380bab | 2013-10-16 18:09:19 +0200 | [diff] [blame] | 664 | } |
| 665 | } |
| 666 | |
| 667 | int gprs_rlcmac_tbf::rlcmac_diag() |
| 668 | { |
| 669 | if ((state_flags & (1 << GPRS_RLCMAC_FLAG_CCCH))) |
| 670 | LOGP(DRLCMAC, LOGL_NOTICE, "- Assignment was on CCCH\n"); |
| 671 | if ((state_flags & (1 << GPRS_RLCMAC_FLAG_PACCH))) |
| 672 | LOGP(DRLCMAC, LOGL_NOTICE, "- Assignment was on PACCH\n"); |
| 673 | if ((state_flags & (1 << GPRS_RLCMAC_FLAG_UL_DATA))) |
| 674 | LOGP(DRLCMAC, LOGL_NOTICE, "- Uplink data was received\n"); |
| 675 | else if (direction == GPRS_RLCMAC_UL_TBF) |
| 676 | LOGP(DRLCMAC, LOGL_NOTICE, "- No uplink data received yet\n"); |
| 677 | if ((state_flags & (1 << GPRS_RLCMAC_FLAG_DL_ACK))) |
| 678 | LOGP(DRLCMAC, LOGL_NOTICE, "- Downlink ACK was received\n"); |
| 679 | else if (direction == GPRS_RLCMAC_DL_TBF) |
| 680 | LOGP(DRLCMAC, LOGL_NOTICE, "- No downlink ACK received yet\n"); |
| 681 | |
| 682 | return 0; |
| 683 | } |
| 684 | |
Holger Hans Peter Freyther | 1702f10 | 2013-10-20 08:44:02 +0200 | [diff] [blame] | 685 | struct msgb *gprs_rlcmac_tbf::llc_dequeue(bssgp_bvc_ctx *bctx) |
| 686 | { |
| 687 | struct msgb *msg; |
| 688 | struct timeval *tv, tv_now; |
| 689 | uint32_t octets = 0, frames = 0; |
| 690 | |
| 691 | gettimeofday(&tv_now, NULL); |
| 692 | |
Holger Hans Peter Freyther | 758dc12 | 2013-11-06 20:39:45 +0100 | [diff] [blame] | 693 | while ((msg = m_llc.dequeue())) { |
Holger Hans Peter Freyther | 1702f10 | 2013-10-20 08:44:02 +0200 | [diff] [blame] | 694 | tv = (struct timeval *)msg->data; |
| 695 | msgb_pull(msg, sizeof(*tv)); |
Daniel Willmann | 9c62389 | 2013-12-04 18:11:47 +0100 | [diff] [blame] | 696 | msgb_pull(msg, sizeof(*tv)); |
Holger Hans Peter Freyther | 51e093b | 2013-11-13 15:35:45 +0100 | [diff] [blame] | 697 | |
Holger Hans Peter Freyther | b1302b0 | 2013-11-13 17:15:26 +0100 | [diff] [blame] | 698 | if (gprs_llc::is_frame_expired(&tv_now, tv)) { |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 699 | LOGP(DRLCMACDL, LOGL_NOTICE, "%s Discarding LLC PDU " |
Holger Hans Peter Freyther | 550bb88 | 2013-12-04 17:10:54 +0100 | [diff] [blame] | 700 | "because lifetime limit reached. Queue size %zu\n", |
| 701 | tbf_name(this), m_llc.m_queue_size); |
Holger Hans Peter Freyther | b3d5ee2 | 2013-11-13 16:43:26 +0100 | [diff] [blame] | 702 | bts->llc_timedout_frame(); |
Holger Hans Peter Freyther | 1702f10 | 2013-10-20 08:44:02 +0200 | [diff] [blame] | 703 | frames++; |
| 704 | octets += msg->len; |
| 705 | msgb_free(msg); |
| 706 | continue; |
| 707 | } |
| 708 | break; |
| 709 | } |
| 710 | |
| 711 | if (frames) { |
| 712 | if (frames > 0xff) |
| 713 | frames = 0xff; |
| 714 | if (octets > 0xffffff) |
| 715 | octets = 0xffffff; |
Holger Hans Peter Freyther | 474685e | 2013-10-27 17:01:14 +0100 | [diff] [blame] | 716 | bssgp_tx_llc_discarded(bctx, m_tlli, frames, octets); |
Holger Hans Peter Freyther | 1702f10 | 2013-10-20 08:44:02 +0200 | [diff] [blame] | 717 | } |
| 718 | |
| 719 | return msg; |
| 720 | } |
| 721 | |
Holger Hans Peter Freyther | d11290b | 2013-10-26 17:32:04 +0200 | [diff] [blame] | 722 | /* |
| 723 | * Store received block data in LLC message(s) and forward to SGSN |
| 724 | * if complete. |
| 725 | */ |
Holger Hans Peter Freyther | e5dc2a0 | 2013-11-13 20:10:12 +0100 | [diff] [blame] | 726 | int gprs_rlcmac_tbf::assemble_forward_llc(const gprs_rlc_data *_data) |
Holger Hans Peter Freyther | d11290b | 2013-10-26 17:32:04 +0200 | [diff] [blame] | 727 | { |
Holger Hans Peter Freyther | e5dc2a0 | 2013-11-13 20:10:12 +0100 | [diff] [blame] | 728 | const uint8_t *data = _data->block; |
| 729 | uint8_t len = _data->len; |
| 730 | const struct rlc_ul_header *rh = (const struct rlc_ul_header *) data; |
Holger Hans Peter Freyther | d11290b | 2013-10-26 17:32:04 +0200 | [diff] [blame] | 731 | uint8_t e, m; |
| 732 | struct rlc_li_field *li; |
| 733 | uint8_t frame_offset[16], offset = 0, chunk; |
| 734 | int i, frames = 0; |
| 735 | |
| 736 | LOGP(DRLCMACUL, LOGL_DEBUG, "- Assembling frames: (len=%d)\n", len); |
| 737 | |
| 738 | data += 3; |
| 739 | len -= 3; |
| 740 | e = rh->e; /* if extended */ |
| 741 | m = 1; /* more frames, that means: the first frame */ |
| 742 | |
| 743 | /* Parse frame offsets from length indicator(s), if any. */ |
| 744 | while (1) { |
| 745 | if (frames == (int)sizeof(frame_offset)) { |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 746 | LOGP(DRLCMACUL, LOGL_ERROR, "%s too many frames in " |
| 747 | "block\n", tbf_name(this)); |
Holger Hans Peter Freyther | d11290b | 2013-10-26 17:32:04 +0200 | [diff] [blame] | 748 | return -EINVAL; |
| 749 | } |
| 750 | frame_offset[frames++] = offset; |
| 751 | LOGP(DRLCMACUL, LOGL_DEBUG, "-- Frame %d starts at offset " |
| 752 | "%d\n", frames, offset); |
| 753 | if (!len) |
| 754 | break; |
| 755 | /* M == 0 and E == 0 is not allowed in this version. */ |
| 756 | if (!m && !e) { |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 757 | LOGP(DRLCMACUL, LOGL_NOTICE, "%s UL DATA " |
Holger Hans Peter Freyther | d11290b | 2013-10-26 17:32:04 +0200 | [diff] [blame] | 758 | "ignored, because M='0' and E='0'.\n", |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 759 | tbf_name(this)); |
Holger Hans Peter Freyther | d11290b | 2013-10-26 17:32:04 +0200 | [diff] [blame] | 760 | return 0; |
| 761 | } |
| 762 | /* no more frames in this segment */ |
| 763 | if (e) { |
| 764 | break; |
| 765 | } |
| 766 | /* There is a new frame and an LI that delimits it. */ |
| 767 | if (m) { |
| 768 | li = (struct rlc_li_field *)data; |
| 769 | LOGP(DRLCMACUL, LOGL_DEBUG, "-- Delimiter len=%d\n", |
| 770 | li->li); |
| 771 | /* Special case: LI == 0 |
| 772 | * If the last segment would fit precisely into the |
| 773 | * rest of the RLC MAC block, there would be no way |
| 774 | * to delimit that this segment ends and is not |
| 775 | * continued in the next block. |
| 776 | * The special LI (0) is used to force the segment to |
| 777 | * extend into the next block, so it is delimited there. |
| 778 | * This LI must be skipped. Also it is the last LI. |
| 779 | */ |
| 780 | if (li->li == 0) { |
| 781 | data++; |
| 782 | len--; |
| 783 | m = 1; /* M is ignored, we know there is more */ |
| 784 | break; /* handle E as '1', so we break! */ |
| 785 | } |
| 786 | e = li->e; |
| 787 | m = li->m; |
| 788 | offset += li->li; |
| 789 | data++; |
| 790 | len--; |
| 791 | continue; |
| 792 | } |
| 793 | } |
| 794 | if (!m) { |
| 795 | LOGP(DRLCMACUL, LOGL_DEBUG, "- Last frame carries spare " |
| 796 | "data\n"); |
| 797 | } |
| 798 | |
| 799 | LOGP(DRLCMACUL, LOGL_DEBUG, "- Data length after length fields: %d\n", |
| 800 | len); |
| 801 | /* TLLI */ |
| 802 | if (rh->ti) { |
| 803 | if (len < 4) { |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 804 | LOGP(DRLCMACUL, LOGL_NOTICE, "%s UL DATA TLLI out of " |
| 805 | "frame border\n", tbf_name(this)); |
Holger Hans Peter Freyther | d11290b | 2013-10-26 17:32:04 +0200 | [diff] [blame] | 806 | return -EINVAL; |
| 807 | } |
| 808 | data += 4; |
| 809 | len -= 4; |
| 810 | LOGP(DRLCMACUL, LOGL_DEBUG, "- Length after skipping TLLI: " |
| 811 | "%d\n", len); |
| 812 | } |
| 813 | |
| 814 | /* PFI */ |
| 815 | if (rh->pi) { |
| 816 | LOGP(DRLCMACUL, LOGL_ERROR, "ERROR: PFI not supported, " |
| 817 | "please disable in SYSTEM INFORMATION\n"); |
| 818 | if (len < 1) { |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 819 | LOGP(DRLCMACUL, LOGL_NOTICE, "%s UL DATA PFI out of " |
| 820 | "frame border\n", tbf_name(this)); |
Holger Hans Peter Freyther | d11290b | 2013-10-26 17:32:04 +0200 | [diff] [blame] | 821 | return -EINVAL; |
| 822 | } |
| 823 | data++; |
| 824 | len--; |
| 825 | LOGP(DRLCMACUL, LOGL_DEBUG, "- Length after skipping PFI: " |
| 826 | "%d\n", len); |
| 827 | } |
| 828 | |
| 829 | /* Now we have: |
| 830 | * - a list of frames offsets: frame_offset[] |
| 831 | * - number of frames: i |
| 832 | * - m == 0: Last frame carries spare data (end of TBF). |
| 833 | */ |
| 834 | |
| 835 | /* Check if last offset would exceed frame. */ |
| 836 | if (offset > len) { |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 837 | LOGP(DRLCMACUL, LOGL_NOTICE, "%s UL DATA ignored, " |
Holger Hans Peter Freyther | d11290b | 2013-10-26 17:32:04 +0200 | [diff] [blame] | 838 | "because LI delimits data that exceeds block size.\n", |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 839 | tbf_name(this)); |
Holger Hans Peter Freyther | d11290b | 2013-10-26 17:32:04 +0200 | [diff] [blame] | 840 | return -EINVAL; |
| 841 | } |
| 842 | |
| 843 | /* create LLC frames */ |
| 844 | for (i = 0; i < frames; i++) { |
| 845 | /* last frame ? */ |
| 846 | if (i == frames - 1) { |
| 847 | /* no more data in last frame */ |
| 848 | if (!m) |
| 849 | break; |
| 850 | /* data until end of frame */ |
| 851 | chunk = len - frame_offset[i]; |
| 852 | } else { |
| 853 | /* data until next frame */ |
| 854 | chunk = frame_offset[i + 1] - frame_offset[i]; |
| 855 | } |
Holger Hans Peter Freyther | e231026 | 2013-11-13 16:56:15 +0100 | [diff] [blame] | 856 | if (!m_llc.fits_in_current_frame(chunk)) { |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 857 | LOGP(DRLCMACUL, LOGL_NOTICE, "%s LLC frame exceeds " |
Holger Hans Peter Freyther | e231026 | 2013-11-13 16:56:15 +0100 | [diff] [blame] | 858 | "maximum size %u.\n", tbf_name(this), |
| 859 | m_llc.remaining_space()); |
| 860 | chunk = m_llc.remaining_space(); |
Holger Hans Peter Freyther | d11290b | 2013-10-26 17:32:04 +0200 | [diff] [blame] | 861 | } |
Holger Hans Peter Freyther | e231026 | 2013-11-13 16:56:15 +0100 | [diff] [blame] | 862 | m_llc.append_frame(data + frame_offset[i], chunk); |
| 863 | m_llc.consume(chunk); |
Holger Hans Peter Freyther | d11290b | 2013-10-26 17:32:04 +0200 | [diff] [blame] | 864 | /* not last frame. */ |
| 865 | if (i != frames - 1) { |
| 866 | /* send frame to SGSN */ |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 867 | LOGP(DRLCMACUL, LOGL_INFO, "%s complete UL frame len=%d\n", |
Holger Hans Peter Freyther | e231026 | 2013-11-13 16:56:15 +0100 | [diff] [blame] | 868 | tbf_name(this) , m_llc.frame_length()); |
Holger Hans Peter Freyther | 9948514 | 2013-11-06 20:08:42 +0100 | [diff] [blame] | 869 | snd_ul_ud(); |
Holger Hans Peter Freyther | e231026 | 2013-11-13 16:56:15 +0100 | [diff] [blame] | 870 | m_llc.reset(); |
Holger Hans Peter Freyther | d11290b | 2013-10-26 17:32:04 +0200 | [diff] [blame] | 871 | /* also check if CV==0, because the frame may fill up the |
| 872 | * block precisely, then it is also complete. normally the |
| 873 | * frame would be extended into the next block with a 0-length |
| 874 | * delimiter added to this block. */ |
| 875 | } else if (rh->cv == 0) { |
| 876 | /* send frame to SGSN */ |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 877 | LOGP(DRLCMACUL, LOGL_INFO, "%s complete UL frame " |
| 878 | "that fits precisely in last block: " |
Holger Hans Peter Freyther | e231026 | 2013-11-13 16:56:15 +0100 | [diff] [blame] | 879 | "len=%d\n", tbf_name(this), m_llc.frame_length()); |
Holger Hans Peter Freyther | 9948514 | 2013-11-06 20:08:42 +0100 | [diff] [blame] | 880 | snd_ul_ud(); |
Holger Hans Peter Freyther | e231026 | 2013-11-13 16:56:15 +0100 | [diff] [blame] | 881 | m_llc.reset(); |
Holger Hans Peter Freyther | d11290b | 2013-10-26 17:32:04 +0200 | [diff] [blame] | 882 | } |
| 883 | } |
| 884 | |
| 885 | return 0; |
| 886 | } |
| 887 | |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 888 | /* |
| 889 | * Create DL data block |
| 890 | * The messages are fragmented and forwarded as data blocks. |
| 891 | */ |
| 892 | struct msgb *gprs_rlcmac_tbf::create_dl_acked_block(uint32_t fn, uint8_t ts) |
| 893 | { |
Holger Hans Peter Freyther | 34f6e5e | 2013-10-27 20:31:47 +0100 | [diff] [blame] | 894 | LOGP(DRLCMACDL, LOGL_DEBUG, "%s downlink (V(A)==%d .. " |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 895 | "V(S)==%d)\n", tbf_name(this), |
| 896 | dir.dl.window.v_a(), dir.dl.window.v_s()); |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 897 | |
| 898 | do_resend: |
| 899 | /* check if there is a block with negative acknowledgement */ |
Daniel Willmann | 146514e | 2013-12-28 18:24:42 +0100 | [diff] [blame] | 900 | int resend_bsn = dir.dl.window.resend_needed(); |
Holger Hans Peter Freyther | 1577779 | 2013-11-24 00:18:47 +0100 | [diff] [blame] | 901 | if (resend_bsn >= 0) { |
| 902 | LOGP(DRLCMACDL, LOGL_DEBUG, "- Resending BSN %d\n", resend_bsn); |
Holger Hans Peter Freyther | 1577779 | 2013-11-24 00:18:47 +0100 | [diff] [blame] | 903 | /* re-send block with negative aknowlegement */ |
Daniel Willmann | 146514e | 2013-12-28 18:24:42 +0100 | [diff] [blame] | 904 | dir.dl.window.m_v_b.mark_unacked(resend_bsn); |
Holger Hans Peter Freyther | 1577779 | 2013-11-24 00:18:47 +0100 | [diff] [blame] | 905 | bts->rlc_resent(); |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 906 | return create_dl_acked_block(fn, ts, resend_bsn, false); |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 907 | } |
| 908 | |
| 909 | /* if the window has stalled, or transfer is complete, |
| 910 | * send an unacknowledged block */ |
Holger Hans Peter Freyther | c03e382 | 2013-11-24 00:21:32 +0100 | [diff] [blame] | 911 | if (state_is(GPRS_RLCMAC_FINISHED) || dl_window_stalled()) { |
Holger Hans Peter Freyther | ef93bdb | 2013-11-24 00:01:50 +0100 | [diff] [blame] | 912 | if (state_is(GPRS_RLCMAC_FINISHED)) { |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 913 | LOGP(DRLCMACDL, LOGL_DEBUG, "- Restarting at BSN %d, " |
| 914 | "because all blocks have been transmitted.\n", |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 915 | dir.dl.window.v_a()); |
Holger Hans Peter Freyther | ef93bdb | 2013-11-24 00:01:50 +0100 | [diff] [blame] | 916 | bts->rlc_restarted(); |
| 917 | } else { |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 918 | LOGP(DRLCMACDL, LOGL_NOTICE, "- Restarting at BSN %d, " |
| 919 | "because all window is stalled.\n", |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 920 | dir.dl.window.v_a()); |
Holger Hans Peter Freyther | c70aae4 | 2013-11-19 17:09:37 +0100 | [diff] [blame] | 921 | bts->rlc_stalled(); |
| 922 | } |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 923 | /* If V(S) == V(A) and finished state, we would have received |
| 924 | * acknowledgement of all transmitted block. In this case we |
| 925 | * would have transmitted the final block, and received ack |
| 926 | * from MS. But in this case we did not receive the final ack |
| 927 | * indication from MS. This should never happen if MS works |
| 928 | * correctly. */ |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 929 | if (dir.dl.window.window_empty()) { |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 930 | LOGP(DRLCMACDL, LOGL_DEBUG, "- MS acked all blocks, " |
| 931 | "so we re-transmit final block!\n"); |
| 932 | /* we just send final block again */ |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 933 | int16_t index = dir.dl.window.v_s_mod(-1); |
Holger Hans Peter Freyther | e9429b5 | 2013-11-13 19:36:57 +0100 | [diff] [blame] | 934 | bts->rlc_resent(); |
Holger Hans Peter Freyther | a6ba67c | 2013-11-24 00:44:21 +0100 | [diff] [blame] | 935 | return create_dl_acked_block(fn, ts, index, false); |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 936 | } |
| 937 | |
| 938 | /* cycle through all unacked blocks */ |
Daniel Willmann | 146514e | 2013-12-28 18:24:42 +0100 | [diff] [blame] | 939 | int resend = dir.dl.window.mark_for_resend(); |
Holger Hans Peter Freyther | 8b16ae3 | 2013-11-24 00:38:54 +0100 | [diff] [blame] | 940 | |
| 941 | /* At this point there should be at least one unacked block |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 942 | * to be resent. If not, this is an software error. */ |
| 943 | if (resend == 0) { |
| 944 | LOGP(DRLCMACDL, LOGL_ERROR, "Software error: " |
| 945 | "There are no unacknowledged blocks, but V(A) " |
| 946 | " != V(S). PLEASE FIX!\n"); |
| 947 | /* we just send final block again */ |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 948 | int16_t index = dir.dl.window.v_s_mod(-1); |
Holger Hans Peter Freyther | a6ba67c | 2013-11-24 00:44:21 +0100 | [diff] [blame] | 949 | return create_dl_acked_block(fn, ts, index, false); |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 950 | } |
| 951 | goto do_resend; |
| 952 | } |
| 953 | |
Holger Hans Peter Freyther | a6ba67c | 2013-11-24 00:44:21 +0100 | [diff] [blame] | 954 | return create_new_bsn(fn, ts); |
| 955 | } |
| 956 | |
| 957 | struct msgb *gprs_rlcmac_tbf::create_new_bsn(const uint32_t fn, const uint8_t ts) |
| 958 | { |
| 959 | struct rlc_dl_header *rh; |
| 960 | struct rlc_li_field *li; |
| 961 | struct msgb *msg; |
Holger Hans Peter Freyther | a6ba67c | 2013-11-24 00:44:21 +0100 | [diff] [blame] | 962 | uint8_t *delimiter, *data, *e_pointer; |
| 963 | uint16_t space, chunk; |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 964 | gprs_rlc_data *rlc_data; |
Holger Hans Peter Freyther | a6ba67c | 2013-11-24 00:44:21 +0100 | [diff] [blame] | 965 | bool first_fin_ack = false; |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 966 | const uint16_t bsn = dir.dl.window.v_s(); |
Holger Hans Peter Freyther | a6ba67c | 2013-11-24 00:44:21 +0100 | [diff] [blame] | 967 | |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 968 | LOGP(DRLCMACDL, LOGL_DEBUG, "- Sending new block at BSN %d\n", |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 969 | dir.dl.window.v_s()); |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 970 | |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 971 | #warning "Selection of the CS doesn't belong here" |
| 972 | if (cs == 0) { |
| 973 | cs = bts_data()->initial_cs_dl; |
| 974 | if (cs < 1 || cs > 4) |
| 975 | cs = 1; |
| 976 | } |
Holger Hans Peter Freyther | 58db60c | 2013-11-13 20:45:40 +0100 | [diff] [blame] | 977 | /* total length of block, including spare bits */ |
| 978 | const uint8_t block_length = gprs_rlcmac_cs[cs].block_length; |
| 979 | /* length of usable data of block, w/o spare bits, inc. MAC */ |
| 980 | const uint8_t block_data_len = gprs_rlcmac_cs[cs].block_data; |
| 981 | |
| 982 | /* now we still have untransmitted LLC data, so we fill mac block */ |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 983 | rlc_data = m_rlc.block(bsn); |
| 984 | data = rlc_data->prepare(block_data_len); |
Holger Hans Peter Freyther | 58db60c | 2013-11-13 20:45:40 +0100 | [diff] [blame] | 985 | |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 986 | rh = (struct rlc_dl_header *)data; |
| 987 | rh->pt = 0; /* Data Block */ |
| 988 | rh->rrbp = rh->s_p = 0; /* Polling, set later, if required */ |
| 989 | rh->usf = 7; /* will be set at scheduler */ |
| 990 | rh->pr = 0; /* FIXME: power reduction */ |
Holger Hans Peter Freyther | 34f6e5e | 2013-10-27 20:31:47 +0100 | [diff] [blame] | 991 | rh->tfi = m_tfi; /* TFI */ |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 992 | rh->fbi = 0; /* Final Block Indicator, set late, if true */ |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 993 | rh->bsn = bsn; /* Block Sequence Number */ |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 994 | rh->e = 0; /* Extension bit, maybe set later */ |
| 995 | e_pointer = data + 2; /* points to E of current chunk */ |
Holger Hans Peter Freyther | 58db60c | 2013-11-13 20:45:40 +0100 | [diff] [blame] | 996 | data += sizeof(*rh); |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 997 | delimiter = data; /* where next length header would be stored */ |
Holger Hans Peter Freyther | 58db60c | 2013-11-13 20:45:40 +0100 | [diff] [blame] | 998 | space = block_data_len - sizeof(*rh); |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 999 | while (1) { |
Holger Hans Peter Freyther | acb5427 | 2013-11-07 08:15:58 +0100 | [diff] [blame] | 1000 | chunk = m_llc.chunk_size(); |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 1001 | /* if chunk will exceed block limit */ |
| 1002 | if (chunk > space) { |
| 1003 | LOGP(DRLCMACDL, LOGL_DEBUG, "-- Chunk with length %d " |
| 1004 | "larger than space (%d) left in block: copy " |
| 1005 | "only remaining space, and we are done\n", |
| 1006 | chunk, space); |
| 1007 | /* block is filled, so there is no extension */ |
| 1008 | *e_pointer |= 0x01; |
| 1009 | /* fill only space */ |
Holger Hans Peter Freyther | acb5427 | 2013-11-07 08:15:58 +0100 | [diff] [blame] | 1010 | m_llc.consume(data, space); |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 1011 | /* return data block as message */ |
| 1012 | break; |
| 1013 | } |
| 1014 | /* if FINAL chunk would fit precisely in space left */ |
Holger Hans Peter Freyther | 28e5378 | 2013-11-06 20:23:56 +0100 | [diff] [blame] | 1015 | if (chunk == space && llist_empty(&m_llc.queue)) { |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 1016 | LOGP(DRLCMACDL, LOGL_DEBUG, "-- Chunk with length %d " |
| 1017 | "would exactly fit into space (%d): because " |
| 1018 | "this is a final block, we don't add length " |
| 1019 | "header, and we are done\n", chunk, space); |
| 1020 | LOGP(DRLCMACDL, LOGL_INFO, "Complete DL frame for " |
Holger Hans Peter Freyther | 34f6e5e | 2013-10-27 20:31:47 +0100 | [diff] [blame] | 1021 | "%s that fits precisely in last block: " |
Holger Hans Peter Freyther | e231026 | 2013-11-13 16:56:15 +0100 | [diff] [blame] | 1022 | "len=%d\n", tbf_name(this), m_llc.frame_length()); |
| 1023 | gprs_rlcmac_dl_bw(this, m_llc.frame_length()); |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 1024 | /* block is filled, so there is no extension */ |
| 1025 | *e_pointer |= 0x01; |
| 1026 | /* fill space */ |
Holger Hans Peter Freyther | acb5427 | 2013-11-07 08:15:58 +0100 | [diff] [blame] | 1027 | m_llc.consume(data, space); |
Holger Hans Peter Freyther | 758dc12 | 2013-11-06 20:39:45 +0100 | [diff] [blame] | 1028 | m_llc.reset(); |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 1029 | /* final block */ |
| 1030 | rh->fbi = 1; /* we indicate final block */ |
| 1031 | tbf_new_state(this, GPRS_RLCMAC_FINISHED); |
| 1032 | /* return data block as message */ |
| 1033 | break; |
| 1034 | } |
| 1035 | /* if chunk would fit exactly in space left */ |
| 1036 | if (chunk == space) { |
| 1037 | LOGP(DRLCMACDL, LOGL_DEBUG, "-- Chunk with length %d " |
| 1038 | "would exactly fit into space (%d): add length " |
| 1039 | "header with LI=0, to make frame extend to " |
| 1040 | "next block, and we are done\n", chunk, space); |
| 1041 | /* make space for delimiter */ |
| 1042 | if (delimiter != data) |
Daniel Willmann | c3d5325 | 2013-11-13 20:27:21 +0100 | [diff] [blame] | 1043 | memmove(delimiter + 1, delimiter, |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 1044 | data - delimiter); |
| 1045 | data++; |
| 1046 | space--; |
| 1047 | /* add LI with 0 length */ |
| 1048 | li = (struct rlc_li_field *)delimiter; |
| 1049 | li->e = 1; /* not more extension */ |
| 1050 | li->m = 0; /* shall be set to 0, in case of li = 0 */ |
| 1051 | li->li = 0; /* chunk fills the complete space */ |
| 1052 | // no need to set e_pointer nor increase delimiter |
| 1053 | /* fill only space, which is 1 octet less than chunk */ |
Holger Hans Peter Freyther | acb5427 | 2013-11-07 08:15:58 +0100 | [diff] [blame] | 1054 | m_llc.consume(data, space); |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 1055 | /* return data block as message */ |
| 1056 | break; |
| 1057 | } |
| 1058 | LOGP(DRLCMACDL, LOGL_DEBUG, "-- Chunk with length %d is less " |
| 1059 | "than remaining space (%d): add length header to " |
| 1060 | "to delimit LLC frame\n", chunk, space); |
| 1061 | /* the LLC frame chunk ends in this block */ |
| 1062 | /* make space for delimiter */ |
| 1063 | if (delimiter != data) |
Daniel Willmann | c3d5325 | 2013-11-13 20:27:21 +0100 | [diff] [blame] | 1064 | memmove(delimiter + 1, delimiter, data - delimiter); |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 1065 | data++; |
| 1066 | space--; |
| 1067 | /* add LI to delimit frame */ |
| 1068 | li = (struct rlc_li_field *)delimiter; |
| 1069 | li->e = 0; /* Extension bit, maybe set later */ |
| 1070 | li->m = 0; /* will be set later, if there is more LLC data */ |
| 1071 | li->li = chunk; /* length of chunk */ |
| 1072 | e_pointer = delimiter; /* points to E of current delimiter */ |
| 1073 | delimiter++; |
Holger Hans Peter Freyther | acb5427 | 2013-11-07 08:15:58 +0100 | [diff] [blame] | 1074 | /* copy (rest of) LLC frame to space and reset later */ |
| 1075 | m_llc.consume(data, chunk); |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 1076 | data += chunk; |
| 1077 | space -= chunk; |
Holger Hans Peter Freyther | 34f6e5e | 2013-10-27 20:31:47 +0100 | [diff] [blame] | 1078 | LOGP(DRLCMACDL, LOGL_INFO, "Complete DL frame for %s" |
Holger Hans Peter Freyther | e231026 | 2013-11-13 16:56:15 +0100 | [diff] [blame] | 1079 | "len=%d\n", tbf_name(this), m_llc.frame_length()); |
| 1080 | gprs_rlcmac_dl_bw(this, m_llc.frame_length()); |
Holger Hans Peter Freyther | 758dc12 | 2013-11-06 20:39:45 +0100 | [diff] [blame] | 1081 | m_llc.reset(); |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 1082 | /* dequeue next LLC frame, if any */ |
| 1083 | msg = llc_dequeue(gprs_bssgp_pcu_current_bctx()); |
| 1084 | if (msg) { |
| 1085 | LOGP(DRLCMACDL, LOGL_INFO, "- Dequeue next LLC for " |
Holger Hans Peter Freyther | 34f6e5e | 2013-10-27 20:31:47 +0100 | [diff] [blame] | 1086 | "%s (len=%d)\n", tbf_name(this), msg->len); |
Holger Hans Peter Freyther | 857281f | 2013-11-13 14:56:55 +0100 | [diff] [blame] | 1087 | m_llc.put_frame(msg->data, msg->len); |
Holger Hans Peter Freyther | b3d5ee2 | 2013-11-13 16:43:26 +0100 | [diff] [blame] | 1088 | bts->llc_frame_sched(); |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 1089 | msgb_free(msg); |
| 1090 | } |
| 1091 | /* if we have more data and we have space left */ |
Holger Hans Peter Freyther | e231026 | 2013-11-13 16:56:15 +0100 | [diff] [blame] | 1092 | if (space > 0 && m_llc.frame_length()) { |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 1093 | li->m = 1; /* we indicate more frames to follow */ |
| 1094 | continue; |
| 1095 | } |
| 1096 | /* if we don't have more LLC frames */ |
Holger Hans Peter Freyther | e231026 | 2013-11-13 16:56:15 +0100 | [diff] [blame] | 1097 | if (!m_llc.frame_length()) { |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 1098 | LOGP(DRLCMACDL, LOGL_DEBUG, "-- Final block, so we " |
| 1099 | "done.\n"); |
| 1100 | li->e = 1; /* we cannot extend */ |
| 1101 | rh->fbi = 1; /* we indicate final block */ |
Holger Hans Peter Freyther | b784046 | 2013-11-07 07:50:26 +0100 | [diff] [blame] | 1102 | first_fin_ack = true; |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 1103 | /* + 1 indicates: first final ack */ |
| 1104 | tbf_new_state(this, GPRS_RLCMAC_FINISHED); |
| 1105 | break; |
| 1106 | } |
| 1107 | /* we have no space left */ |
| 1108 | LOGP(DRLCMACDL, LOGL_DEBUG, "-- No space left, so we are " |
| 1109 | "done.\n"); |
| 1110 | li->e = 1; /* we cannot extend */ |
| 1111 | break; |
| 1112 | } |
| 1113 | LOGP(DRLCMACDL, LOGL_DEBUG, "data block: %s\n", |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 1114 | osmo_hexdump(rlc_data->block, block_length)); |
Holger Hans Peter Freyther | 58db60c | 2013-11-13 20:45:40 +0100 | [diff] [blame] | 1115 | #warning "move this up?" |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 1116 | rlc_data->len = block_length; |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 1117 | /* raise send state and set ack state array */ |
Daniel Willmann | 146514e | 2013-12-28 18:24:42 +0100 | [diff] [blame] | 1118 | dir.dl.window.m_v_b.mark_unacked(bsn); |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 1119 | dir.dl.window.increment_send(); |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 1120 | |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 1121 | return create_dl_acked_block(fn, ts, bsn, first_fin_ack); |
Holger Hans Peter Freyther | b784046 | 2013-11-07 07:50:26 +0100 | [diff] [blame] | 1122 | } |
| 1123 | |
| 1124 | struct msgb *gprs_rlcmac_tbf::create_dl_acked_block( |
| 1125 | const uint32_t fn, const uint8_t ts, |
| 1126 | const int index, const bool first_fin_ack) |
| 1127 | { |
| 1128 | uint8_t *data; |
| 1129 | struct rlc_dl_header *rh; |
| 1130 | struct msgb *dl_msg; |
| 1131 | uint8_t len; |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 1132 | |
| 1133 | /* get data and header from current block */ |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 1134 | data = m_rlc.block(index)->block; |
| 1135 | len = m_rlc.block(index)->len; |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 1136 | rh = (struct rlc_dl_header *)data; |
| 1137 | |
| 1138 | /* Clear Polling, if still set in history buffer */ |
| 1139 | rh->s_p = 0; |
| 1140 | |
| 1141 | /* poll after POLL_ACK_AFTER_FRAMES frames, or when final block is tx. |
| 1142 | */ |
| 1143 | if (dir.dl.tx_counter >= POLL_ACK_AFTER_FRAMES || first_fin_ack) { |
| 1144 | if (first_fin_ack) { |
| 1145 | LOGP(DRLCMACDL, LOGL_DEBUG, "- Scheduling Ack/Nack " |
| 1146 | "polling, because first final block sent.\n"); |
| 1147 | } else { |
| 1148 | LOGP(DRLCMACDL, LOGL_DEBUG, "- Scheduling Ack/Nack " |
| 1149 | "polling, because %d blocks sent.\n", |
| 1150 | POLL_ACK_AFTER_FRAMES); |
| 1151 | } |
| 1152 | /* scheduling not possible, because: */ |
| 1153 | if (poll_state != GPRS_RLCMAC_POLL_NONE) |
Holger Hans Peter Freyther | e5109ba | 2014-01-16 10:11:22 +0100 | [diff] [blame] | 1154 | LOGP(DRLCMACDL, LOGL_DEBUG, "Polling is already " |
Holger Hans Peter Freyther | 34f6e5e | 2013-10-27 20:31:47 +0100 | [diff] [blame] | 1155 | "sheduled for %s, so we must wait for " |
| 1156 | "requesting downlink ack\n", tbf_name(this)); |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 1157 | else if (control_ts != ts) |
Holger Hans Peter Freyther | e5109ba | 2014-01-16 10:11:22 +0100 | [diff] [blame] | 1158 | LOGP(DRLCMACDL, LOGL_DEBUG, "Polling cannot be " |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 1159 | "sheduled in this TS %d, waiting for " |
| 1160 | "TS %d\n", ts, control_ts); |
Holger Hans Peter Freyther | 58db60c | 2013-11-13 20:45:40 +0100 | [diff] [blame] | 1161 | #warning "What happens to the first_fin_ack in case something is already scheduled?" |
Holger Hans Peter Freyther | ec80f82 | 2013-10-27 13:44:37 +0100 | [diff] [blame] | 1162 | else if (bts->sba()->find(trx->trx_no, ts, (fn + 13) % 2715648)) |
Holger Hans Peter Freyther | e5109ba | 2014-01-16 10:11:22 +0100 | [diff] [blame] | 1163 | LOGP(DRLCMACDL, LOGL_DEBUG, "Polling cannot be " |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 1164 | "sheduled, because single block alllocation " |
| 1165 | "already exists\n"); |
| 1166 | else { |
Holger Hans Peter Freyther | e5109ba | 2014-01-16 10:11:22 +0100 | [diff] [blame] | 1167 | LOGP(DRLCMACDL, LOGL_DEBUG, "Polling sheduled in this " |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 1168 | "TS %d\n", ts); |
| 1169 | dir.dl.tx_counter = 0; |
| 1170 | /* start timer whenever we send the final block */ |
| 1171 | if (rh->fbi == 1) |
| 1172 | tbf_timer_start(this, 3191, bts_data()->t3191, 0); |
| 1173 | |
| 1174 | /* schedule polling */ |
| 1175 | poll_state = GPRS_RLCMAC_POLL_SCHED; |
| 1176 | poll_fn = (fn + 13) % 2715648; |
| 1177 | |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 1178 | /* set polling in header */ |
| 1179 | rh->rrbp = 0; /* N+13 */ |
| 1180 | rh->s_p = 1; /* Polling */ |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 1181 | } |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 1182 | } |
| 1183 | |
| 1184 | /* return data block as message */ |
| 1185 | dl_msg = msgb_alloc(len, "rlcmac_dl_data"); |
| 1186 | if (!dl_msg) |
| 1187 | return NULL; |
Holger Hans Peter Freyther | 64b49bc | 2013-11-23 23:16:07 +0100 | [diff] [blame] | 1188 | |
| 1189 | /* Increment TX-counter */ |
| 1190 | dir.dl.tx_counter++; |
| 1191 | |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 1192 | memcpy(msgb_put(dl_msg, len), data, len); |
Holger Hans Peter Freyther | e9429b5 | 2013-11-13 19:36:57 +0100 | [diff] [blame] | 1193 | bts->rlc_sent(); |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 1194 | |
| 1195 | return dl_msg; |
| 1196 | } |
| 1197 | |
Holger Hans Peter Freyther | 2db7e7e | 2013-10-26 20:45:35 +0200 | [diff] [blame] | 1198 | struct msgb *gprs_rlcmac_tbf::create_dl_ass(uint32_t fn) |
| 1199 | { |
| 1200 | struct msgb *msg; |
| 1201 | struct gprs_rlcmac_tbf *new_tbf; |
Holger Hans Peter Freyther | 9977e15 | 2013-11-24 22:52:10 +0100 | [diff] [blame] | 1202 | int poll_ass_dl = 1; |
Holger Hans Peter Freyther | 2db7e7e | 2013-10-26 20:45:35 +0200 | [diff] [blame] | 1203 | |
Holger Hans Peter Freyther | 9977e15 | 2013-11-24 22:52:10 +0100 | [diff] [blame] | 1204 | if (direction == GPRS_RLCMAC_DL_TBF && control_ts != first_common_ts) { |
Holger Hans Peter Freyther | 2db7e7e | 2013-10-26 20:45:35 +0200 | [diff] [blame] | 1205 | LOGP(DRLCMAC, LOGL_NOTICE, "Cannot poll for downlink " |
| 1206 | "assigment, because MS cannot reply. (control TS=%d, " |
| 1207 | "first common TS=%d)\n", control_ts, |
| 1208 | first_common_ts); |
| 1209 | poll_ass_dl = 0; |
| 1210 | } |
| 1211 | if (poll_ass_dl) { |
| 1212 | if (poll_state != GPRS_RLCMAC_POLL_NONE) { |
| 1213 | LOGP(DRLCMAC, LOGL_DEBUG, "Polling is already sheduled " |
Holger Hans Peter Freyther | 34f6e5e | 2013-10-27 20:31:47 +0100 | [diff] [blame] | 1214 | "for %s, so we must wait for downlink " |
| 1215 | "assignment...\n", tbf_name(this)); |
Holger Hans Peter Freyther | 2db7e7e | 2013-10-26 20:45:35 +0200 | [diff] [blame] | 1216 | return NULL; |
| 1217 | } |
Holger Hans Peter Freyther | ec80f82 | 2013-10-27 13:44:37 +0100 | [diff] [blame] | 1218 | if (bts->sba()->find(trx->trx_no, control_ts, (fn + 13) % 2715648)) { |
Holger Hans Peter Freyther | 2db7e7e | 2013-10-26 20:45:35 +0200 | [diff] [blame] | 1219 | LOGP(DRLCMACUL, LOGL_DEBUG, "Polling is already " |
| 1220 | "scheduled for single block allocation...\n"); |
| 1221 | return NULL; |
| 1222 | } |
| 1223 | } |
| 1224 | |
| 1225 | /* on uplink TBF we get the downlink TBF to be assigned. */ |
| 1226 | if (direction == GPRS_RLCMAC_UL_TBF) { |
| 1227 | /* be sure to check first, if contention resolution is done, |
| 1228 | * otherwise we cannot send the assignment yet */ |
| 1229 | if (!dir.ul.contention_resolution_done) { |
| 1230 | LOGP(DRLCMAC, LOGL_DEBUG, "Cannot assign DL TBF now, " |
| 1231 | "because contention resolution is not " |
| 1232 | "finished.\n"); |
| 1233 | return NULL; |
| 1234 | } |
| 1235 | #warning "THIS should probably go over the IMSI too" |
Daniel Willmann | b59d61b | 2014-07-02 17:58:14 +0200 | [diff] [blame] | 1236 | new_tbf = bts->dl_tbf_by_tlli(m_tlli); |
Holger Hans Peter Freyther | 2db7e7e | 2013-10-26 20:45:35 +0200 | [diff] [blame] | 1237 | } else |
| 1238 | new_tbf = this; |
| 1239 | if (!new_tbf) { |
| 1240 | LOGP(DRLCMACDL, LOGL_ERROR, "We have a schedule for downlink " |
Holger Hans Peter Freyther | 34f6e5e | 2013-10-27 20:31:47 +0100 | [diff] [blame] | 1241 | "assignment at uplink %s, but there is no downlink " |
| 1242 | "TBF\n", tbf_name(this)); |
Holger Hans Peter Freyther | 2db7e7e | 2013-10-26 20:45:35 +0200 | [diff] [blame] | 1243 | dl_ass_state = GPRS_RLCMAC_DL_ASS_NONE; |
| 1244 | return NULL; |
| 1245 | } |
| 1246 | |
| 1247 | msg = msgb_alloc(23, "rlcmac_dl_ass"); |
| 1248 | if (!msg) |
| 1249 | return NULL; |
| 1250 | bitvec *ass_vec = bitvec_alloc(23); |
| 1251 | if (!ass_vec) { |
| 1252 | msgb_free(msg); |
| 1253 | return NULL; |
| 1254 | } |
| 1255 | bitvec_unhex(ass_vec, |
| 1256 | "2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b"); |
Holger Hans Peter Freyther | 474685e | 2013-10-27 17:01:14 +0100 | [diff] [blame] | 1257 | LOGP(DRLCMAC, LOGL_INFO, "%s start Packet Downlink Assignment (PACCH)\n", tbf_name(new_tbf)); |
Holger Hans Peter Freyther | 2db7e7e | 2013-10-26 20:45:35 +0200 | [diff] [blame] | 1258 | RlcMacDownlink_t * mac_control_block = (RlcMacDownlink_t *)talloc_zero(tall_pcu_ctx, RlcMacDownlink_t); |
Holger Hans Peter Freyther | 34f6e5e | 2013-10-27 20:31:47 +0100 | [diff] [blame] | 1259 | Encoding::write_packet_downlink_assignment(mac_control_block, m_tfi, |
Holger Hans Peter Freyther | 2db7e7e | 2013-10-26 20:45:35 +0200 | [diff] [blame] | 1260 | (direction == GPRS_RLCMAC_DL_TBF), new_tbf, |
| 1261 | poll_ass_dl, bts_data()->alpha, bts_data()->gamma, -1, 0); |
| 1262 | LOGP(DRLCMAC, LOGL_DEBUG, "+++++++++++++++++++++++++ TX : Packet Downlink Assignment +++++++++++++++++++++++++\n"); |
| 1263 | encode_gsm_rlcmac_downlink(ass_vec, mac_control_block); |
| 1264 | LOGPC(DCSN1, LOGL_NOTICE, "\n"); |
| 1265 | LOGP(DRLCMAC, LOGL_DEBUG, "------------------------- TX : Packet Downlink Assignment -------------------------\n"); |
| 1266 | bitvec_pack(ass_vec, msgb_put(msg, 23)); |
| 1267 | bitvec_free(ass_vec); |
| 1268 | talloc_free(mac_control_block); |
| 1269 | |
| 1270 | if (poll_ass_dl) { |
| 1271 | poll_state = GPRS_RLCMAC_POLL_SCHED; |
| 1272 | poll_fn = (fn + 13) % 2715648; |
| 1273 | dl_ass_state = GPRS_RLCMAC_DL_ASS_WAIT_ACK; |
| 1274 | } else { |
| 1275 | dl_ass_state = GPRS_RLCMAC_DL_ASS_NONE; |
| 1276 | tbf_new_state(new_tbf, GPRS_RLCMAC_FLOW); |
| 1277 | tbf_assign_control_ts(new_tbf); |
| 1278 | /* stop pending assignment timer */ |
| 1279 | new_tbf->stop_timer(); |
| 1280 | |
| 1281 | } |
Holger Hans Peter Freyther | 2db7e7e | 2013-10-26 20:45:35 +0200 | [diff] [blame] | 1282 | |
| 1283 | return msg; |
| 1284 | } |
| 1285 | |
Holger Hans Peter Freyther | ae03f22 | 2013-10-26 21:20:51 +0200 | [diff] [blame] | 1286 | struct msgb *gprs_rlcmac_tbf::create_ul_ass(uint32_t fn) |
| 1287 | { |
| 1288 | struct msgb *msg; |
| 1289 | struct gprs_rlcmac_tbf *new_tbf; |
| 1290 | |
Holger Hans Peter Freyther | ae03f22 | 2013-10-26 21:20:51 +0200 | [diff] [blame] | 1291 | if (poll_state != GPRS_RLCMAC_POLL_NONE) { |
| 1292 | LOGP(DRLCMACUL, LOGL_DEBUG, "Polling is already " |
Holger Hans Peter Freyther | 34f6e5e | 2013-10-27 20:31:47 +0100 | [diff] [blame] | 1293 | "sheduled for %s, so we must wait for uplink " |
| 1294 | "assignment...\n", tbf_name(this)); |
Holger Hans Peter Freyther | ae03f22 | 2013-10-26 21:20:51 +0200 | [diff] [blame] | 1295 | return NULL; |
| 1296 | } |
Holger Hans Peter Freyther | ec80f82 | 2013-10-27 13:44:37 +0100 | [diff] [blame] | 1297 | if (bts->sba()->find(trx->trx_no, control_ts, (fn + 13) % 2715648)) { |
Holger Hans Peter Freyther | ae03f22 | 2013-10-26 21:20:51 +0200 | [diff] [blame] | 1298 | LOGP(DRLCMACUL, LOGL_DEBUG, "Polling is already scheduled for " |
| 1299 | "single block allocation...\n"); |
| 1300 | return NULL; |
| 1301 | } |
Holger Hans Peter Freyther | ae03f22 | 2013-10-26 21:20:51 +0200 | [diff] [blame] | 1302 | |
| 1303 | /* on down TBF we get the uplink TBF to be assigned. */ |
| 1304 | #warning "Probably want to find by IMSI too" |
| 1305 | if (direction == GPRS_RLCMAC_DL_TBF) |
Daniel Willmann | b59d61b | 2014-07-02 17:58:14 +0200 | [diff] [blame] | 1306 | new_tbf = bts->ul_tbf_by_tlli(m_tlli); |
Holger Hans Peter Freyther | ae03f22 | 2013-10-26 21:20:51 +0200 | [diff] [blame] | 1307 | else |
| 1308 | new_tbf = this; |
| 1309 | |
| 1310 | if (!new_tbf) { |
| 1311 | LOGP(DRLCMACUL, LOGL_ERROR, "We have a schedule for uplink " |
Holger Hans Peter Freyther | 34f6e5e | 2013-10-27 20:31:47 +0100 | [diff] [blame] | 1312 | "assignment at downlink %s, but there is no uplink " |
| 1313 | "TBF\n", tbf_name(this)); |
Holger Hans Peter Freyther | ae03f22 | 2013-10-26 21:20:51 +0200 | [diff] [blame] | 1314 | ul_ass_state = GPRS_RLCMAC_UL_ASS_NONE; |
| 1315 | return NULL; |
| 1316 | } |
| 1317 | |
| 1318 | msg = msgb_alloc(23, "rlcmac_ul_ass"); |
| 1319 | if (!msg) |
| 1320 | return NULL; |
Holger Hans Peter Freyther | 474685e | 2013-10-27 17:01:14 +0100 | [diff] [blame] | 1321 | LOGP(DRLCMAC, LOGL_INFO, "%ss start Packet Uplink Assignment (PACCH)\n", tbf_name(new_tbf)); |
Holger Hans Peter Freyther | ae03f22 | 2013-10-26 21:20:51 +0200 | [diff] [blame] | 1322 | bitvec *ass_vec = bitvec_alloc(23); |
| 1323 | if (!ass_vec) { |
| 1324 | msgb_free(msg); |
| 1325 | return NULL; |
| 1326 | } |
| 1327 | bitvec_unhex(ass_vec, |
| 1328 | "2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b"); |
Holger Hans Peter Freyther | 34f6e5e | 2013-10-27 20:31:47 +0100 | [diff] [blame] | 1329 | Encoding::write_packet_uplink_assignment(bts_data(), ass_vec, m_tfi, |
Holger Hans Peter Freyther | 474685e | 2013-10-27 17:01:14 +0100 | [diff] [blame] | 1330 | (direction == GPRS_RLCMAC_DL_TBF), m_tlli, |
Holger Hans Peter Freyther | 9977e15 | 2013-11-24 22:52:10 +0100 | [diff] [blame] | 1331 | m_tlli_valid, new_tbf, 1, bts_data()->alpha, |
Holger Hans Peter Freyther | ae03f22 | 2013-10-26 21:20:51 +0200 | [diff] [blame] | 1332 | bts_data()->gamma, -1); |
| 1333 | bitvec_pack(ass_vec, msgb_put(msg, 23)); |
| 1334 | RlcMacDownlink_t * mac_control_block = (RlcMacDownlink_t *)talloc_zero(tall_pcu_ctx, RlcMacDownlink_t); |
| 1335 | LOGP(DRLCMAC, LOGL_DEBUG, "+++++++++++++++++++++++++ TX : Packet Uplink Assignment +++++++++++++++++++++++++\n"); |
| 1336 | decode_gsm_rlcmac_downlink(ass_vec, mac_control_block); |
| 1337 | LOGPC(DCSN1, LOGL_NOTICE, "\n"); |
| 1338 | LOGP(DRLCMAC, LOGL_DEBUG, "------------------------- TX : Packet Uplink Assignment -------------------------\n"); |
| 1339 | bitvec_free(ass_vec); |
| 1340 | talloc_free(mac_control_block); |
| 1341 | |
Holger Hans Peter Freyther | ae03f22 | 2013-10-26 21:20:51 +0200 | [diff] [blame] | 1342 | poll_state = GPRS_RLCMAC_POLL_SCHED; |
| 1343 | poll_fn = (fn + 13) % 2715648; |
| 1344 | ul_ass_state = GPRS_RLCMAC_UL_ASS_WAIT_ACK; |
Holger Hans Peter Freyther | ae03f22 | 2013-10-26 21:20:51 +0200 | [diff] [blame] | 1345 | |
| 1346 | return msg; |
| 1347 | } |
| 1348 | |
Holger Hans Peter Freyther | 46bcb8d | 2013-10-26 21:04:28 +0200 | [diff] [blame] | 1349 | struct msgb *gprs_rlcmac_tbf::create_ul_ack(uint32_t fn) |
| 1350 | { |
| 1351 | int final = (state_is(GPRS_RLCMAC_FINISHED)); |
| 1352 | struct msgb *msg; |
| 1353 | |
| 1354 | if (final) { |
| 1355 | if (poll_state != GPRS_RLCMAC_POLL_NONE) { |
| 1356 | LOGP(DRLCMACUL, LOGL_DEBUG, "Polling is already " |
Holger Hans Peter Freyther | 34f6e5e | 2013-10-27 20:31:47 +0100 | [diff] [blame] | 1357 | "sheduled for %s, so we must wait for " |
| 1358 | "final uplink ack...\n", tbf_name(this)); |
Holger Hans Peter Freyther | 46bcb8d | 2013-10-26 21:04:28 +0200 | [diff] [blame] | 1359 | return NULL; |
| 1360 | } |
Holger Hans Peter Freyther | ec80f82 | 2013-10-27 13:44:37 +0100 | [diff] [blame] | 1361 | if (bts->sba()->find(trx->trx_no, control_ts, (fn + 13) % 2715648)) { |
Holger Hans Peter Freyther | 46bcb8d | 2013-10-26 21:04:28 +0200 | [diff] [blame] | 1362 | LOGP(DRLCMACUL, LOGL_DEBUG, "Polling is already " |
| 1363 | "scheduled for single block allocation...\n"); |
| 1364 | return NULL; |
| 1365 | } |
| 1366 | } |
| 1367 | |
| 1368 | msg = msgb_alloc(23, "rlcmac_ul_ack"); |
| 1369 | if (!msg) |
| 1370 | return NULL; |
| 1371 | bitvec *ack_vec = bitvec_alloc(23); |
| 1372 | if (!ack_vec) { |
| 1373 | msgb_free(msg); |
| 1374 | return NULL; |
| 1375 | } |
| 1376 | bitvec_unhex(ack_vec, |
| 1377 | "2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b"); |
| 1378 | RlcMacDownlink_t * mac_control_block = (RlcMacDownlink_t *)talloc_zero(tall_pcu_ctx, RlcMacDownlink_t); |
| 1379 | Encoding::write_packet_uplink_ack(bts_data(), mac_control_block, this, final); |
| 1380 | encode_gsm_rlcmac_downlink(ack_vec, mac_control_block); |
| 1381 | bitvec_pack(ack_vec, msgb_put(msg, 23)); |
| 1382 | bitvec_free(ack_vec); |
| 1383 | talloc_free(mac_control_block); |
| 1384 | |
| 1385 | /* now we must set this flag, so we are allowed to assign downlink |
Holger Hans Peter Freyther | 22b3119 | 2013-10-26 21:07:45 +0200 | [diff] [blame] | 1386 | * TBF on PACCH. it is only allowed when TLLI is acknowledged. */ |
Holger Hans Peter Freyther | 46bcb8d | 2013-10-26 21:04:28 +0200 | [diff] [blame] | 1387 | dir.ul.contention_resolution_done = 1; |
| 1388 | |
| 1389 | if (final) { |
| 1390 | poll_state = GPRS_RLCMAC_POLL_SCHED; |
| 1391 | poll_fn = (fn + 13) % 2715648; |
| 1392 | /* waiting for final acknowledge */ |
| 1393 | ul_ack_state = GPRS_RLCMAC_UL_ACK_WAIT_ACK; |
| 1394 | dir.ul.final_ack_sent = 1; |
| 1395 | } else |
| 1396 | ul_ack_state = GPRS_RLCMAC_UL_ACK_NONE; |
Holger Hans Peter Freyther | 46bcb8d | 2013-10-26 21:04:28 +0200 | [diff] [blame] | 1397 | |
| 1398 | return msg; |
| 1399 | } |
| 1400 | |
Holger Hans Peter Freyther | 86dc355 | 2013-11-24 17:28:49 +0100 | [diff] [blame] | 1401 | int gprs_rlcmac_tbf::update_window(const uint8_t ssn, const uint8_t *rbb) |
Holger Hans Peter Freyther | 3dc56a3 | 2013-10-26 21:38:30 +0200 | [diff] [blame] | 1402 | { |
Holger Hans Peter Freyther | 3dc56a3 | 2013-10-26 21:38:30 +0200 | [diff] [blame] | 1403 | int16_t dist; /* must be signed */ |
Holger Hans Peter Freyther | 86dc355 | 2013-11-24 17:28:49 +0100 | [diff] [blame] | 1404 | uint16_t lost = 0, received = 0; |
Holger Hans Peter Freyther | 86dc355 | 2013-11-24 17:28:49 +0100 | [diff] [blame] | 1405 | char show_rbb[65]; |
| 1406 | char show_v_b[RLC_MAX_SNS + 1]; |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 1407 | const uint16_t mod_sns = dir.dl.window.mod_sns(); |
Holger Hans Peter Freyther | 86dc355 | 2013-11-24 17:28:49 +0100 | [diff] [blame] | 1408 | |
| 1409 | Decoding::extract_rbb(rbb, show_rbb); |
| 1410 | /* show received array in debug (bit 64..1) */ |
| 1411 | LOGP(DRLCMACDL, LOGL_DEBUG, "- ack: (BSN=%d)\"%s\"" |
Daniel Willmann | 6f7cb2c | 2013-12-11 14:25:20 +0100 | [diff] [blame] | 1412 | "(BSN=%d) R=ACK I=NACK\n", (ssn - 64) & mod_sns, |
Holger Hans Peter Freyther | 86dc355 | 2013-11-24 17:28:49 +0100 | [diff] [blame] | 1413 | show_rbb, (ssn - 1) & mod_sns); |
| 1414 | |
| 1415 | /* apply received array to receive state (SSN-64..SSN-1) */ |
| 1416 | /* calculate distance of ssn from V(S) */ |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 1417 | dist = (dir.dl.window.v_s() - ssn) & mod_sns; |
Holger Hans Peter Freyther | 86dc355 | 2013-11-24 17:28:49 +0100 | [diff] [blame] | 1418 | /* check if distance is less than distance V(A)..V(S) */ |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 1419 | if (dist >= dir.dl.window.distance()) { |
Holger Hans Peter Freyther | 86dc355 | 2013-11-24 17:28:49 +0100 | [diff] [blame] | 1420 | /* this might happpen, if the downlink assignment |
| 1421 | * was not received by ms and the ack refers |
| 1422 | * to previous TBF |
| 1423 | * FIXME: we should implement polling for |
| 1424 | * control ack!*/ |
| 1425 | LOGP(DRLCMACDL, LOGL_NOTICE, "- ack range is out of " |
| 1426 | "V(A)..V(S) range %s Free TBF!\n", tbf_name(this)); |
| 1427 | return 1; /* indicate to free TBF */ |
| 1428 | } |
| 1429 | |
Daniel Willmann | 146514e | 2013-12-28 18:24:42 +0100 | [diff] [blame] | 1430 | dir.dl.window.update(bts, show_rbb, ssn, |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 1431 | &lost, &received); |
Holger Hans Peter Freyther | 86dc355 | 2013-11-24 17:28:49 +0100 | [diff] [blame] | 1432 | |
| 1433 | /* report lost and received packets */ |
| 1434 | gprs_rlcmac_received_lost(this, received, lost); |
| 1435 | |
| 1436 | /* raise V(A), if possible */ |
Daniel Willmann | 146514e | 2013-12-28 18:24:42 +0100 | [diff] [blame] | 1437 | dir.dl.window.raise(dir.dl.window.move_window()); |
Holger Hans Peter Freyther | 86dc355 | 2013-11-24 17:28:49 +0100 | [diff] [blame] | 1438 | |
| 1439 | /* show receive state array in debug (V(A)..V(S)-1) */ |
Daniel Willmann | 3ce011f | 2014-01-15 12:45:56 +0100 | [diff] [blame] | 1440 | dir.dl.window.show_state(show_v_b); |
Holger Hans Peter Freyther | 86dc355 | 2013-11-24 17:28:49 +0100 | [diff] [blame] | 1441 | LOGP(DRLCMACDL, LOGL_DEBUG, "- V(B): (V(A)=%d)\"%s\"" |
| 1442 | "(V(S)-1=%d) A=Acked N=Nacked U=Unacked " |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 1443 | "X=Resend-Unacked I=Invalid\n", |
| 1444 | dir.dl.window.v_a(), show_v_b, |
| 1445 | dir.dl.window.v_s_mod(-1)); |
Holger Hans Peter Freyther | 86dc355 | 2013-11-24 17:28:49 +0100 | [diff] [blame] | 1446 | |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 1447 | if (state_is(GPRS_RLCMAC_FINISHED) && dir.dl.window.window_empty()) { |
Holger Hans Peter Freyther | 86dc355 | 2013-11-24 17:28:49 +0100 | [diff] [blame] | 1448 | LOGP(DRLCMACDL, LOGL_NOTICE, "Received acknowledge of " |
| 1449 | "all blocks, but without final ack " |
| 1450 | "inidcation (don't worry)\n"); |
| 1451 | } |
| 1452 | return 0; |
| 1453 | } |
| 1454 | |
| 1455 | |
| 1456 | int gprs_rlcmac_tbf::maybe_start_new_window() |
| 1457 | { |
Holger Hans Peter Freyther | 3dc56a3 | 2013-10-26 21:38:30 +0200 | [diff] [blame] | 1458 | struct msgb *msg; |
Holger Hans Peter Freyther | 9c5539d | 2013-11-24 17:34:17 +0100 | [diff] [blame] | 1459 | uint16_t received; |
Holger Hans Peter Freyther | 3dc56a3 | 2013-10-26 21:38:30 +0200 | [diff] [blame] | 1460 | |
Holger Hans Peter Freyther | 3dc56a3 | 2013-10-26 21:38:30 +0200 | [diff] [blame] | 1461 | LOGP(DRLCMACDL, LOGL_DEBUG, "- Final ACK received.\n"); |
Holger Hans Peter Freyther | 3dc56a3 | 2013-10-26 21:38:30 +0200 | [diff] [blame] | 1462 | /* range V(A)..V(S)-1 */ |
Daniel Willmann | 146514e | 2013-12-28 18:24:42 +0100 | [diff] [blame] | 1463 | received = dir.dl.window.count_unacked(); |
Holger Hans Peter Freyther | 3dc56a3 | 2013-10-26 21:38:30 +0200 | [diff] [blame] | 1464 | |
| 1465 | /* report all outstanding packets as received */ |
Holger Hans Peter Freyther | 9c5539d | 2013-11-24 17:34:17 +0100 | [diff] [blame] | 1466 | gprs_rlcmac_received_lost(this, received, 0); |
Holger Hans Peter Freyther | 3dc56a3 | 2013-10-26 21:38:30 +0200 | [diff] [blame] | 1467 | |
Daniel Willmann | 73191a4 | 2014-05-30 17:58:00 +0200 | [diff] [blame] | 1468 | tbf_new_state(this, GPRS_RLCMAC_WAIT_RELEASE); |
| 1469 | |
Holger Hans Peter Freyther | 3dc56a3 | 2013-10-26 21:38:30 +0200 | [diff] [blame] | 1470 | /* check for LLC PDU in the LLC Queue */ |
| 1471 | msg = llc_dequeue(gprs_bssgp_pcu_current_bctx()); |
| 1472 | if (!msg) { |
| 1473 | /* no message, start T3193, change state to RELEASE */ |
Holger Hans Peter Freyther | 86dc355 | 2013-11-24 17:28:49 +0100 | [diff] [blame] | 1474 | LOGP(DRLCMACDL, LOGL_DEBUG, "- No new message, so we release.\n"); |
Holger Hans Peter Freyther | 3dc56a3 | 2013-10-26 21:38:30 +0200 | [diff] [blame] | 1475 | /* start T3193 */ |
Holger Hans Peter Freyther | 3dc56a3 | 2013-10-26 21:38:30 +0200 | [diff] [blame] | 1476 | tbf_timer_start(this, 3193, |
| 1477 | bts_data()->t3193_msec / 1000, |
| 1478 | (bts_data()->t3193_msec % 1000) * 1000); |
Holger Hans Peter Freyther | 3dc56a3 | 2013-10-26 21:38:30 +0200 | [diff] [blame] | 1479 | |
| 1480 | return 0; |
| 1481 | } |
Holger Hans Peter Freyther | 3dc56a3 | 2013-10-26 21:38:30 +0200 | [diff] [blame] | 1482 | |
Holger Hans Peter Freyther | 55cf994 | 2013-11-13 18:15:45 +0100 | [diff] [blame] | 1483 | /* we have more data so we will re-use this tbf */ |
| 1484 | reuse_tbf(msg->data, msg->len); |
| 1485 | msgb_free(msg); |
Holger Hans Peter Freyther | 3dc56a3 | 2013-10-26 21:38:30 +0200 | [diff] [blame] | 1486 | return 0; |
| 1487 | } |
| 1488 | |
Daniel Willmann | fc03bbe | 2014-05-30 17:57:59 +0200 | [diff] [blame] | 1489 | int gprs_rlcmac_tbf::rcvd_dl_ack(uint8_t final_ack, uint8_t ssn, uint8_t *rbb) |
Holger Hans Peter Freyther | 86dc355 | 2013-11-24 17:28:49 +0100 | [diff] [blame] | 1490 | { |
| 1491 | LOGP(DRLCMACDL, LOGL_DEBUG, "%s downlink acknowledge\n", tbf_name(this)); |
| 1492 | |
| 1493 | if (!final_ack) |
| 1494 | return update_window(ssn, rbb); |
| 1495 | return maybe_start_new_window(); |
| 1496 | } |
| 1497 | |
Holger Hans Peter Freyther | 964ddb6 | 2013-10-16 17:53:23 +0200 | [diff] [blame] | 1498 | void gprs_rlcmac_tbf::free_all(struct gprs_rlcmac_trx *trx) |
| 1499 | { |
| 1500 | for (uint8_t tfi = 0; tfi < 32; tfi++) { |
| 1501 | struct gprs_rlcmac_tbf *tbf; |
| 1502 | |
| 1503 | tbf = trx->ul_tbf[tfi]; |
| 1504 | if (tbf) |
| 1505 | tbf_free(tbf); |
| 1506 | tbf = trx->dl_tbf[tfi]; |
| 1507 | if (tbf) |
| 1508 | tbf_free(tbf); |
| 1509 | } |
| 1510 | } |
Holger Hans Peter Freyther | 4f6a4e5d | 2013-10-16 17:58:46 +0200 | [diff] [blame] | 1511 | |
| 1512 | void gprs_rlcmac_tbf::free_all(struct gprs_rlcmac_pdch *pdch) |
| 1513 | { |
| 1514 | for (uint8_t tfi = 0; tfi < 32; tfi++) { |
| 1515 | struct gprs_rlcmac_tbf *tbf; |
| 1516 | |
Daniel Willmann | 17a1d5e | 2014-05-30 20:21:30 +0200 | [diff] [blame] | 1517 | tbf = pdch->ul_tbf_by_tfi(tfi); |
Holger Hans Peter Freyther | 4f6a4e5d | 2013-10-16 17:58:46 +0200 | [diff] [blame] | 1518 | if (tbf) |
| 1519 | tbf_free(tbf); |
Daniel Willmann | 17a1d5e | 2014-05-30 20:21:30 +0200 | [diff] [blame] | 1520 | tbf = pdch->dl_tbf_by_tfi(tfi); |
Holger Hans Peter Freyther | 4f6a4e5d | 2013-10-16 17:58:46 +0200 | [diff] [blame] | 1521 | if (tbf) |
| 1522 | tbf_free(tbf); |
| 1523 | } |
| 1524 | } |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 1525 | |
Holger Hans Peter Freyther | 474685e | 2013-10-27 17:01:14 +0100 | [diff] [blame] | 1526 | void gprs_rlcmac_tbf::tlli_mark_valid() |
| 1527 | { |
| 1528 | m_tlli_valid = true; |
| 1529 | } |
| 1530 | |
| 1531 | void gprs_rlcmac_tbf::update_tlli(uint32_t tlli) |
| 1532 | { |
| 1533 | if (tlli == m_tlli) |
| 1534 | return; |
| 1535 | |
Holger Hans Peter Freyther | b809866 | 2013-10-30 14:50:17 +0100 | [diff] [blame] | 1536 | bool changedUl = false; |
| 1537 | |
| 1538 | /* |
| 1539 | * During a Routing Area Update (due the assignment of a new |
| 1540 | * P-TMSI) the tlli can change. We notice this when receiving |
| 1541 | * a PACKET CONTROL ACK. |
| 1542 | * When we get a TLLI change on the DL we will look if there |
| 1543 | * is a UL TBF and change the tlli there as well. |
| 1544 | * |
| 1545 | * TODO: There could be multiple DL and UL TBFs and we should |
| 1546 | * have a proper way to link all the related TBFs so we can do |
| 1547 | * a group update. |
| 1548 | */ |
| 1549 | if (m_tlli_valid && direction == GPRS_RLCMAC_DL_TBF) { |
| 1550 | gprs_rlcmac_tbf *ul_tbf; |
Daniel Willmann | b59d61b | 2014-07-02 17:58:14 +0200 | [diff] [blame] | 1551 | ul_tbf = bts->ul_tbf_by_tlli(m_tlli); |
Holger Hans Peter Freyther | b809866 | 2013-10-30 14:50:17 +0100 | [diff] [blame] | 1552 | |
| 1553 | if (ul_tbf) { |
| 1554 | ul_tbf->m_tlli = tlli; |
| 1555 | changedUl = true; |
| 1556 | } |
| 1557 | } |
| 1558 | |
Holger Hans Peter Freyther | bc1626e | 2013-10-30 19:50:49 +0100 | [diff] [blame] | 1559 | /* update the timing advance for the new tlli */ |
| 1560 | bts->timing_advance()->update(m_tlli, tlli, ta); |
| 1561 | |
Holger Hans Peter Freyther | b809866 | 2013-10-30 14:50:17 +0100 | [diff] [blame] | 1562 | LOGP(DRLCMAC, LOGL_NOTICE, |
| 1563 | "%s changing tlli from TLLI=0x%08x TLLI=0x%08x ul_changed=%d\n", |
| 1564 | tbf_name(this), m_tlli, tlli, changedUl); |
Holger Hans Peter Freyther | 474685e | 2013-10-27 17:01:14 +0100 | [diff] [blame] | 1565 | m_tlli = tlli; |
| 1566 | } |
| 1567 | |
Holger Hans Peter Freyther | 4c06d91 | 2013-11-25 23:05:26 +0100 | [diff] [blame] | 1568 | int gprs_rlcmac_tbf::extract_tlli(const uint8_t *data, const size_t len) |
| 1569 | { |
| 1570 | struct gprs_rlcmac_tbf *dl_tbf, *ul_tbf; |
| 1571 | struct rlc_ul_header *rh = (struct rlc_ul_header *)data; |
| 1572 | uint32_t new_tlli; |
| 1573 | int rc; |
| 1574 | |
| 1575 | /* no TLLI yet */ |
| 1576 | if (!rh->ti) { |
| 1577 | LOGP(DRLCMACUL, LOGL_NOTICE, "UL DATA TFI=%d without " |
| 1578 | "TLLI, but no TLLI received yet\n", rh->tfi); |
| 1579 | return 0; |
| 1580 | } |
| 1581 | rc = Decoding::tlli_from_ul_data(data, len, &new_tlli); |
| 1582 | if (rc) { |
| 1583 | bts->decode_error(); |
| 1584 | LOGP(DRLCMACUL, LOGL_NOTICE, "Failed to decode TLLI " |
| 1585 | "of UL DATA TFI=%d.\n", rh->tfi); |
| 1586 | return 0; |
| 1587 | } |
| 1588 | update_tlli(new_tlli); |
| 1589 | LOGP(DRLCMACUL, LOGL_INFO, "Decoded premier TLLI=0x%08x of " |
| 1590 | "UL DATA TFI=%d.\n", tlli(), rh->tfi); |
Daniel Willmann | b59d61b | 2014-07-02 17:58:14 +0200 | [diff] [blame] | 1591 | if ((dl_tbf = bts->dl_tbf_by_tlli(tlli()))) { |
Holger Hans Peter Freyther | 4c06d91 | 2013-11-25 23:05:26 +0100 | [diff] [blame] | 1592 | LOGP(DRLCMACUL, LOGL_NOTICE, "Got RACH from " |
| 1593 | "TLLI=0x%08x while %s still exists. " |
| 1594 | "Killing pending DL TBF\n", tlli(), |
| 1595 | tbf_name(dl_tbf)); |
| 1596 | tbf_free(dl_tbf); |
Holger Hans Peter Freyther | 3d0cc2f | 2014-01-16 10:09:42 +0100 | [diff] [blame] | 1597 | dl_tbf = NULL; |
Holger Hans Peter Freyther | 4c06d91 | 2013-11-25 23:05:26 +0100 | [diff] [blame] | 1598 | } |
Daniel Willmann | b59d61b | 2014-07-02 17:58:14 +0200 | [diff] [blame] | 1599 | /* ul_tbf_by_tlli will not find your TLLI, because it is not |
Holger Hans Peter Freyther | 4c06d91 | 2013-11-25 23:05:26 +0100 | [diff] [blame] | 1600 | * yet marked valid */ |
Daniel Willmann | b59d61b | 2014-07-02 17:58:14 +0200 | [diff] [blame] | 1601 | if ((ul_tbf = bts->ul_tbf_by_tlli(tlli()))) { |
Holger Hans Peter Freyther | 4c06d91 | 2013-11-25 23:05:26 +0100 | [diff] [blame] | 1602 | LOGP(DRLCMACUL, LOGL_NOTICE, "Got RACH from " |
| 1603 | "TLLI=0x%08x while %s still exists. " |
| 1604 | "Killing pending UL TBF\n", tlli(), |
| 1605 | tbf_name(ul_tbf)); |
| 1606 | tbf_free(ul_tbf); |
Holger Hans Peter Freyther | 3d0cc2f | 2014-01-16 10:09:42 +0100 | [diff] [blame] | 1607 | ul_tbf = NULL; |
Holger Hans Peter Freyther | 4c06d91 | 2013-11-25 23:05:26 +0100 | [diff] [blame] | 1608 | } |
| 1609 | /* mark TLLI valid now */ |
| 1610 | tlli_mark_valid(); |
| 1611 | /* store current timing advance */ |
| 1612 | bts->timing_advance()->remember(tlli(), ta); |
| 1613 | return 1; |
| 1614 | } |
| 1615 | |
Holger Hans Peter Freyther | 77e0597 | 2013-11-06 19:16:43 +0100 | [diff] [blame] | 1616 | int gprs_rlcmac_tbf::rcv_data_block_acknowledged(const uint8_t *data, size_t len, int8_t rssi) |
| 1617 | { |
Holger Hans Peter Freyther | 77e0597 | 2013-11-06 19:16:43 +0100 | [diff] [blame] | 1618 | struct rlc_ul_header *rh = (struct rlc_ul_header *)data; |
| 1619 | int rc; |
| 1620 | |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 1621 | const uint16_t mod_sns = dir.ul.window.mod_sns(); |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 1622 | const uint16_t ws = dir.ul.window.ws(); |
| 1623 | |
Holger Hans Peter Freyther | 77e0597 | 2013-11-06 19:16:43 +0100 | [diff] [blame] | 1624 | this->state_flags |= (1 << GPRS_RLCMAC_FLAG_UL_DATA); |
| 1625 | |
| 1626 | LOGP(DRLCMACUL, LOGL_DEBUG, "UL DATA TFI=%d received (V(Q)=%d .. " |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 1627 | "V(R)=%d)\n", rh->tfi, this->dir.ul.window.v_q(), |
| 1628 | this->dir.ul.window.v_r()); |
Holger Hans Peter Freyther | 77e0597 | 2013-11-06 19:16:43 +0100 | [diff] [blame] | 1629 | |
| 1630 | /* process RSSI */ |
| 1631 | gprs_rlcmac_rssi(this, rssi); |
| 1632 | |
| 1633 | /* get TLLI */ |
| 1634 | if (!this->is_tlli_valid()) { |
Holger Hans Peter Freyther | 4c06d91 | 2013-11-25 23:05:26 +0100 | [diff] [blame] | 1635 | if (!extract_tlli(data, len)) |
Holger Hans Peter Freyther | 77e0597 | 2013-11-06 19:16:43 +0100 | [diff] [blame] | 1636 | return 0; |
Holger Hans Peter Freyther | 77e0597 | 2013-11-06 19:16:43 +0100 | [diff] [blame] | 1637 | /* already have TLLI, but we stille get another one */ |
| 1638 | } else if (rh->ti) { |
| 1639 | uint32_t tlli; |
| 1640 | rc = Decoding::tlli_from_ul_data(data, len, &tlli); |
| 1641 | if (rc) { |
| 1642 | LOGP(DRLCMACUL, LOGL_NOTICE, "Failed to decode TLLI " |
| 1643 | "of UL DATA TFI=%d.\n", rh->tfi); |
| 1644 | return 0; |
| 1645 | } |
| 1646 | if (tlli != this->tlli()) { |
| 1647 | LOGP(DRLCMACUL, LOGL_NOTICE, "TLLI mismatch on UL " |
| 1648 | "DATA TFI=%d. (Ignoring due to contention " |
| 1649 | "resolution)\n", rh->tfi); |
| 1650 | return 0; |
| 1651 | } |
| 1652 | } |
| 1653 | |
Holger Hans Peter Freyther | 77e0597 | 2013-11-06 19:16:43 +0100 | [diff] [blame] | 1654 | /* restart T3169 */ |
| 1655 | tbf_timer_start(this, 3169, bts_data()->t3169, 0); |
| 1656 | |
| 1657 | /* Increment RX-counter */ |
| 1658 | this->dir.ul.rx_counter++; |
| 1659 | |
Holger Hans Peter Freyther | 6ab5b24 | 2013-11-24 22:43:03 +0100 | [diff] [blame] | 1660 | if (!dir.ul.window.is_in_window(rh->bsn)) { |
Holger Hans Peter Freyther | 77e0597 | 2013-11-06 19:16:43 +0100 | [diff] [blame] | 1661 | LOGP(DRLCMACUL, LOGL_DEBUG, "- BSN %d out of window " |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 1662 | "%d..%d (it's normal)\n", rh->bsn, |
| 1663 | dir.ul.window.v_q(), |
| 1664 | (dir.ul.window.v_q() + ws - 1) & mod_sns); |
Holger Hans Peter Freyther | 3c95776 | 2013-11-26 21:03:56 +0100 | [diff] [blame] | 1665 | maybe_schedule_uplink_acknack(rh); |
Holger Hans Peter Freyther | 77e0597 | 2013-11-06 19:16:43 +0100 | [diff] [blame] | 1666 | return 0; |
| 1667 | } |
Holger Hans Peter Freyther | 6ab5b24 | 2013-11-24 22:43:03 +0100 | [diff] [blame] | 1668 | |
Holger Hans Peter Freyther | 77e0597 | 2013-11-06 19:16:43 +0100 | [diff] [blame] | 1669 | /* Write block to buffer and set receive state array. */ |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 1670 | m_rlc.block(rh->bsn)->put_data(data, len); |
Holger Hans Peter Freyther | 77e0597 | 2013-11-06 19:16:43 +0100 | [diff] [blame] | 1671 | LOGP(DRLCMACUL, LOGL_DEBUG, "- BSN %d storing in window (%d..%d)\n", |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 1672 | rh->bsn, dir.ul.window.v_q(), |
| 1673 | (dir.ul.window.v_q() + ws - 1) & mod_sns); |
Holger Hans Peter Freyther | 9977e15 | 2013-11-24 22:52:10 +0100 | [diff] [blame] | 1674 | |
Holger Hans Peter Freyther | 77e0597 | 2013-11-06 19:16:43 +0100 | [diff] [blame] | 1675 | /* Raise V(Q) if possible, and retrieve LLC frames from blocks. |
| 1676 | * This is looped until there is a gap (non received block) or |
| 1677 | * the window is empty.*/ |
Holger Hans Peter Freyther | 7f3e662 | 2013-11-25 23:51:19 +0100 | [diff] [blame] | 1678 | const uint16_t v_q_beg = dir.ul.window.v_q(); |
Daniel Willmann | 5584479 | 2013-12-28 14:41:00 +0100 | [diff] [blame] | 1679 | |
| 1680 | const uint16_t count = dir.ul.window.receive_bsn(rh->bsn); |
Holger Hans Peter Freyther | 7f3e662 | 2013-11-25 23:51:19 +0100 | [diff] [blame] | 1681 | |
| 1682 | /* Retrieve LLC frames from blocks that are ready */ |
| 1683 | for (uint16_t i = 0; i < count; ++i) { |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 1684 | uint16_t index = (v_q_beg + i) & mod_sns; |
| 1685 | assemble_forward_llc(m_rlc.block(index)); |
Holger Hans Peter Freyther | 77e0597 | 2013-11-06 19:16:43 +0100 | [diff] [blame] | 1686 | } |
| 1687 | |
| 1688 | /* Check CV of last frame in buffer */ |
| 1689 | if (this->state_is(GPRS_RLCMAC_FLOW) /* still in flow state */ |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 1690 | && this->dir.ul.window.v_q() == this->dir.ul.window.v_r()) { /* if complete */ |
Holger Hans Peter Freyther | 77e0597 | 2013-11-06 19:16:43 +0100 | [diff] [blame] | 1691 | struct rlc_ul_header *last_rh = (struct rlc_ul_header *) |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 1692 | m_rlc.block((dir.ul.window.v_r() - 1) & mod_sns)->block; |
Holger Hans Peter Freyther | 77e0597 | 2013-11-06 19:16:43 +0100 | [diff] [blame] | 1693 | LOGP(DRLCMACUL, LOGL_DEBUG, "- No gaps in received block, " |
| 1694 | "last block: BSN=%d CV=%d\n", last_rh->bsn, |
| 1695 | last_rh->cv); |
| 1696 | if (last_rh->cv == 0) { |
| 1697 | LOGP(DRLCMACUL, LOGL_DEBUG, "- Finished with UL " |
| 1698 | "TBF\n"); |
| 1699 | tbf_new_state(this, GPRS_RLCMAC_FINISHED); |
| 1700 | /* Reset N3103 counter. */ |
| 1701 | this->dir.ul.n3103 = 0; |
| 1702 | } |
| 1703 | } |
| 1704 | |
| 1705 | /* If TLLI is included or if we received half of the window, we send |
| 1706 | * an ack/nack */ |
Holger Hans Peter Freyther | 3c95776 | 2013-11-26 21:03:56 +0100 | [diff] [blame] | 1707 | maybe_schedule_uplink_acknack(rh); |
| 1708 | |
| 1709 | return 0; |
| 1710 | } |
| 1711 | |
| 1712 | void gprs_rlcmac_tbf::maybe_schedule_uplink_acknack(const rlc_ul_header *rh) |
| 1713 | { |
| 1714 | if (rh->si || rh->ti || state_is(GPRS_RLCMAC_FINISHED) |
| 1715 | || (dir.ul.rx_counter % SEND_ACK_AFTER_FRAMES) == 0) { |
Holger Hans Peter Freyther | 77e0597 | 2013-11-06 19:16:43 +0100 | [diff] [blame] | 1716 | if (rh->si) { |
| 1717 | LOGP(DRLCMACUL, LOGL_NOTICE, "- Scheduling Ack/Nack, " |
| 1718 | "because MS is stalled.\n"); |
| 1719 | } |
| 1720 | if (rh->ti) { |
| 1721 | LOGP(DRLCMACUL, LOGL_DEBUG, "- Scheduling Ack/Nack, " |
| 1722 | "because TLLI is included.\n"); |
| 1723 | } |
Holger Hans Peter Freyther | 3c95776 | 2013-11-26 21:03:56 +0100 | [diff] [blame] | 1724 | if (state_is(GPRS_RLCMAC_FINISHED)) { |
Holger Hans Peter Freyther | 77e0597 | 2013-11-06 19:16:43 +0100 | [diff] [blame] | 1725 | LOGP(DRLCMACUL, LOGL_DEBUG, "- Scheduling Ack/Nack, " |
| 1726 | "because last block has CV==0.\n"); |
| 1727 | } |
Holger Hans Peter Freyther | 3c95776 | 2013-11-26 21:03:56 +0100 | [diff] [blame] | 1728 | if ((dir.ul.rx_counter % SEND_ACK_AFTER_FRAMES) == 0) { |
Holger Hans Peter Freyther | 77e0597 | 2013-11-06 19:16:43 +0100 | [diff] [blame] | 1729 | LOGP(DRLCMACUL, LOGL_DEBUG, "- Scheduling Ack/Nack, " |
| 1730 | "because %d frames received.\n", |
| 1731 | SEND_ACK_AFTER_FRAMES); |
| 1732 | } |
Holger Hans Peter Freyther | 3c95776 | 2013-11-26 21:03:56 +0100 | [diff] [blame] | 1733 | if (ul_ack_state == GPRS_RLCMAC_UL_ACK_NONE) { |
Holger Hans Peter Freyther | 77e0597 | 2013-11-06 19:16:43 +0100 | [diff] [blame] | 1734 | /* trigger sending at next RTS */ |
Holger Hans Peter Freyther | 3c95776 | 2013-11-26 21:03:56 +0100 | [diff] [blame] | 1735 | ul_ack_state = GPRS_RLCMAC_UL_ACK_SEND_ACK; |
Holger Hans Peter Freyther | 77e0597 | 2013-11-06 19:16:43 +0100 | [diff] [blame] | 1736 | } else { |
| 1737 | /* already triggered */ |
| 1738 | LOGP(DRLCMACUL, LOGL_DEBUG, "- Sending Ack/Nack is " |
| 1739 | "already triggered, don't schedule!\n"); |
| 1740 | } |
| 1741 | } |
Holger Hans Peter Freyther | 77e0597 | 2013-11-06 19:16:43 +0100 | [diff] [blame] | 1742 | } |
| 1743 | |
Holger Hans Peter Freyther | 9948514 | 2013-11-06 20:08:42 +0100 | [diff] [blame] | 1744 | /* Send Uplink unit-data to SGSN. */ |
| 1745 | int gprs_rlcmac_tbf::snd_ul_ud() |
| 1746 | { |
| 1747 | uint8_t qos_profile[3]; |
| 1748 | struct msgb *llc_pdu; |
Holger Hans Peter Freyther | e231026 | 2013-11-13 16:56:15 +0100 | [diff] [blame] | 1749 | unsigned msg_len = NS_HDR_LEN + BSSGP_HDR_LEN + m_llc.frame_length(); |
Holger Hans Peter Freyther | 9948514 | 2013-11-06 20:08:42 +0100 | [diff] [blame] | 1750 | struct bssgp_bvc_ctx *bctx = gprs_bssgp_pcu_current_bctx(); |
| 1751 | |
Holger Hans Peter Freyther | e231026 | 2013-11-13 16:56:15 +0100 | [diff] [blame] | 1752 | LOGP(DBSSGP, LOGL_INFO, "LLC [PCU -> SGSN] %s len=%d\n", tbf_name(this), m_llc.frame_length()); |
Holger Hans Peter Freyther | 9948514 | 2013-11-06 20:08:42 +0100 | [diff] [blame] | 1753 | if (!bctx) { |
| 1754 | LOGP(DBSSGP, LOGL_ERROR, "No bctx\n"); |
Holger Hans Peter Freyther | 758dc12 | 2013-11-06 20:39:45 +0100 | [diff] [blame] | 1755 | m_llc.reset_frame_space(); |
Holger Hans Peter Freyther | 9948514 | 2013-11-06 20:08:42 +0100 | [diff] [blame] | 1756 | return -EIO; |
| 1757 | } |
| 1758 | |
| 1759 | llc_pdu = msgb_alloc_headroom(msg_len, msg_len,"llc_pdu"); |
Holger Hans Peter Freyther | e231026 | 2013-11-13 16:56:15 +0100 | [diff] [blame] | 1760 | uint8_t *buf = msgb_push(llc_pdu, TL16V_GROSS_LEN(sizeof(uint8_t)*m_llc.frame_length())); |
| 1761 | tl16v_put(buf, BSSGP_IE_LLC_PDU, sizeof(uint8_t)*m_llc.frame_length(), m_llc.frame); |
Holger Hans Peter Freyther | 9948514 | 2013-11-06 20:08:42 +0100 | [diff] [blame] | 1762 | qos_profile[0] = QOS_PROFILE >> 16; |
| 1763 | qos_profile[1] = QOS_PROFILE >> 8; |
| 1764 | qos_profile[2] = QOS_PROFILE; |
| 1765 | bssgp_tx_ul_ud(bctx, tlli(), qos_profile, llc_pdu); |
| 1766 | |
Holger Hans Peter Freyther | 758dc12 | 2013-11-06 20:39:45 +0100 | [diff] [blame] | 1767 | m_llc.reset_frame_space(); |
Holger Hans Peter Freyther | 9948514 | 2013-11-06 20:08:42 +0100 | [diff] [blame] | 1768 | return 0; |
| 1769 | } |
| 1770 | |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 1771 | const char *tbf_name(gprs_rlcmac_tbf *tbf) |
| 1772 | { |
| 1773 | static char buf[40]; |
| 1774 | snprintf(buf, sizeof(buf), "TBF(TFI=%d TLLI=0x%08x DIR=%s)", |
Holger Hans Peter Freyther | 34f6e5e | 2013-10-27 20:31:47 +0100 | [diff] [blame] | 1775 | tbf->m_tfi, tbf->m_tlli, |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 1776 | tbf->direction == GPRS_RLCMAC_UL_TBF ? "UL" : "DL"); |
| 1777 | buf[sizeof(buf) - 1] = '\0'; |
| 1778 | return buf; |
| 1779 | } |
Holger Hans Peter Freyther | 758dc12 | 2013-11-06 20:39:45 +0100 | [diff] [blame] | 1780 | |
Holger Hans Peter Freyther | 55cf994 | 2013-11-13 18:15:45 +0100 | [diff] [blame] | 1781 | |
| 1782 | void gprs_rlcmac_tbf::reuse_tbf(const uint8_t *data, const uint16_t len) |
| 1783 | { |
| 1784 | bts->tbf_reused(); |
| 1785 | m_llc.put_frame(data, len); |
| 1786 | bts->llc_frame_sched(); |
| 1787 | |
| 1788 | /* reset rlc states */ |
| 1789 | memset(&dir.dl, 0, sizeof(dir.dl)); |
Daniel Willmann | 146514e | 2013-12-28 18:24:42 +0100 | [diff] [blame] | 1790 | dir.dl.window.m_v_b.reset(); |
Holger Hans Peter Freyther | 55cf994 | 2013-11-13 18:15:45 +0100 | [diff] [blame] | 1791 | |
| 1792 | /* keep to flags */ |
| 1793 | state_flags &= GPRS_RLCMAC_FLAG_TO_MASK; |
| 1794 | state_flags &= ~(1 << GPRS_RLCMAC_FLAG_CCCH); |
| 1795 | |
| 1796 | update(); |
| 1797 | |
| 1798 | LOGP(DRLCMAC, LOGL_DEBUG, "%s Trigger dowlink assignment on PACCH, " |
| 1799 | "because another LLC PDU has arrived in between\n", |
| 1800 | tbf_name(this)); |
| 1801 | bts->trigger_dl_ass(this, this, NULL); |
| 1802 | } |
Holger Hans Peter Freyther | c03e382 | 2013-11-24 00:21:32 +0100 | [diff] [blame] | 1803 | |
| 1804 | bool gprs_rlcmac_tbf::dl_window_stalled() const |
| 1805 | { |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 1806 | return dir.dl.window.window_stalled(); |
Holger Hans Peter Freyther | c03e382 | 2013-11-24 00:21:32 +0100 | [diff] [blame] | 1807 | } |
Holger Hans Peter Freyther | 7a5f3c2 | 2013-11-26 13:08:12 +0100 | [diff] [blame] | 1808 | |
| 1809 | void gprs_rlcmac_tbf::rotate_in_list() |
| 1810 | { |
Daniel Willmann | 1b3864f | 2014-07-30 13:25:19 +0200 | [diff] [blame^] | 1811 | llist_del(&list.list); |
Holger Hans Peter Freyther | 7a5f3c2 | 2013-11-26 13:08:12 +0100 | [diff] [blame] | 1812 | if (direction == GPRS_RLCMAC_UL_TBF) |
Daniel Willmann | 1b3864f | 2014-07-30 13:25:19 +0200 | [diff] [blame^] | 1813 | llist_add(&list.list, &bts->bts_data()->ul_tbfs); |
Holger Hans Peter Freyther | 7a5f3c2 | 2013-11-26 13:08:12 +0100 | [diff] [blame] | 1814 | else |
Daniel Willmann | 1b3864f | 2014-07-30 13:25:19 +0200 | [diff] [blame^] | 1815 | llist_add(&list.list, &bts->bts_data()->dl_tbfs); |
Holger Hans Peter Freyther | 7a5f3c2 | 2013-11-26 13:08:12 +0100 | [diff] [blame] | 1816 | } |
Holger Hans Peter Freyther | 8f399de | 2013-12-25 20:22:35 +0100 | [diff] [blame] | 1817 | |
| 1818 | uint8_t gprs_rlcmac_tbf::tsc() const |
| 1819 | { |
| 1820 | return trx->pdch[first_ts].tsc; |
| 1821 | } |
Daniel Willmann | afa72f5 | 2014-01-15 17:06:19 +0100 | [diff] [blame] | 1822 | |
| 1823 | void tbf_print_vty_info(struct vty *vty, llist_head *ltbf) |
| 1824 | { |
Daniel Willmann | 1b3864f | 2014-07-30 13:25:19 +0200 | [diff] [blame^] | 1825 | gprs_rlcmac_tbf *tbf = llist_pods_entry(ltbf, gprs_rlcmac_tbf); |
Daniel Willmann | afa72f5 | 2014-01-15 17:06:19 +0100 | [diff] [blame] | 1826 | |
Daniel Willmann | 772415f | 2014-01-15 17:06:51 +0100 | [diff] [blame] | 1827 | vty_out(vty, "TBF: TFI=%d TLLI=0x%08x (%s) DIR=%s IMSI=%s%s", tbf->tfi(), |
Daniel Willmann | afa72f5 | 2014-01-15 17:06:19 +0100 | [diff] [blame] | 1828 | tbf->tlli(), tbf->is_tlli_valid() ? "valid" : "invalid", |
| 1829 | tbf->direction == GPRS_RLCMAC_UL_TBF ? "UL" : "DL", |
| 1830 | tbf->imsi(), VTY_NEWLINE); |
Daniel Willmann | 80367aa | 2014-01-15 17:40:28 +0100 | [diff] [blame] | 1831 | vty_out(vty, " created=%lu state=%08x 1st_TS=%d 1st_cTS=%d ctrl_TS=%d " |
Daniel Willmann | afa72f5 | 2014-01-15 17:06:19 +0100 | [diff] [blame] | 1832 | "MS_CLASS=%d%s", |
Holger Hans Peter Freyther | a004799 | 2014-01-16 10:07:20 +0100 | [diff] [blame] | 1833 | tbf->created_ts(), tbf->state_flags, tbf->first_ts, |
Daniel Willmann | 80367aa | 2014-01-15 17:40:28 +0100 | [diff] [blame] | 1834 | tbf->first_common_ts, tbf->control_ts, tbf->ms_class, |
| 1835 | VTY_NEWLINE); |
Daniel Willmann | afa72f5 | 2014-01-15 17:06:19 +0100 | [diff] [blame] | 1836 | vty_out(vty, " TS_alloc="); |
| 1837 | for (int i = 0; i < 8; i++) { |
| 1838 | if (tbf->pdch[i]) |
| 1839 | vty_out(vty, "%d ", i); |
| 1840 | } |
Daniel Willmann | 772415f | 2014-01-15 17:06:51 +0100 | [diff] [blame] | 1841 | vty_out(vty, " CS=%d%s%s", tbf->cs, VTY_NEWLINE, VTY_NEWLINE); |
Daniel Willmann | afa72f5 | 2014-01-15 17:06:19 +0100 | [diff] [blame] | 1842 | } |