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 | |
Daniel Willmann | 2354402 | 2014-07-30 19:12:27 +0200 | [diff] [blame] | 81 | static struct gprs_rlcmac_dl_tbf *tbf_lookup_dl(BTS *bts, |
Holger Hans Peter Freyther | 34bd8bd | 2013-10-19 21:10:38 +0200 | [diff] [blame] | 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 | |
Daniel Willmann | 538ac5b | 2014-07-30 19:12:27 +0200 | [diff] [blame] | 88 | int gprs_rlcmac_dl_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; |
Daniel Willmann | 532a4b5 | 2014-08-07 12:39:26 +0200 | [diff] [blame] | 126 | struct gprs_rlcmac_ul_tbf *ul_tbf, *old_ul_tbf; |
| 127 | struct gprs_rlcmac_dl_tbf *dl_tbf; |
Holger Hans Peter Freyther | 443c822 | 2013-08-24 20:59:46 +0200 | [diff] [blame] | 128 | int8_t tfi; /* must be signed */ |
| 129 | int rc; |
| 130 | |
| 131 | /* check for uplink data, so we copy our informations */ |
Holger Hans Peter Freyther | bb20b2c | 2013-08-24 21:22:16 +0200 | [diff] [blame] | 132 | #warning "Do the same look up for IMSI, TLLI and OLD_TLLI" |
| 133 | #warning "Refactor the below lines... into a new method" |
Daniel Willmann | 532a4b5 | 2014-08-07 12:39:26 +0200 | [diff] [blame] | 134 | ul_tbf = bts->bts->ul_tbf_by_tlli(tlli); |
Daniel Willmann | 7e994e3 | 2014-08-07 15:49:21 +0200 | [diff] [blame] | 135 | if (ul_tbf && ul_tbf->m_contention_resolution_done |
| 136 | && !ul_tbf->m_final_ack_sent) { |
Daniel Willmann | 532a4b5 | 2014-08-07 12:39:26 +0200 | [diff] [blame] | 137 | use_trx = ul_tbf->trx->trx_no; |
| 138 | ta = ul_tbf->ta; |
Holger Hans Peter Freyther | 443c822 | 2013-08-24 20:59:46 +0200 | [diff] [blame] | 139 | ss = 0; |
Daniel Willmann | 532a4b5 | 2014-08-07 12:39:26 +0200 | [diff] [blame] | 140 | old_ul_tbf = ul_tbf; |
Holger Hans Peter Freyther | 443c822 | 2013-08-24 20:59:46 +0200 | [diff] [blame] | 141 | } else { |
| 142 | use_trx = -1; |
| 143 | /* we already have an uplink TBF, so we use that TA */ |
Daniel Willmann | 532a4b5 | 2014-08-07 12:39:26 +0200 | [diff] [blame] | 144 | if (ul_tbf) |
| 145 | ta = ul_tbf->ta; |
Holger Hans Peter Freyther | 443c822 | 2013-08-24 20:59:46 +0200 | [diff] [blame] | 146 | else { |
| 147 | /* recall TA */ |
Holger Hans Peter Freyther | 111614a | 2013-10-19 20:04:57 +0200 | [diff] [blame] | 148 | rc = bts->bts->timing_advance()->recall(tlli); |
Holger Hans Peter Freyther | 443c822 | 2013-08-24 20:59:46 +0200 | [diff] [blame] | 149 | if (rc < 0) { |
| 150 | LOGP(DRLCMAC, LOGL_NOTICE, "TA unknown" |
| 151 | ", assuming 0\n"); |
| 152 | ta = 0; |
| 153 | } else |
| 154 | ta = rc; |
| 155 | } |
| 156 | ss = 1; /* PCH assignment only allows one timeslot */ |
Daniel Willmann | 532a4b5 | 2014-08-07 12:39:26 +0200 | [diff] [blame] | 157 | old_ul_tbf = NULL; |
Holger Hans Peter Freyther | 443c822 | 2013-08-24 20:59:46 +0200 | [diff] [blame] | 158 | } |
| 159 | |
| 160 | // Create new TBF (any TRX) |
Holger Hans Peter Freyther | bcafdf8 | 2013-08-24 21:13:31 +0200 | [diff] [blame] | 161 | #warning "Copy and paste with alloc_ul_tbf" |
Holger Hans Peter Freyther | 70ddde6 | 2013-10-26 19:17:58 +0200 | [diff] [blame] | 162 | 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] | 163 | if (tfi < 0) { |
| 164 | LOGP(DRLCMAC, LOGL_NOTICE, "No PDCH resource\n"); |
| 165 | /* FIXME: send reject */ |
| 166 | return -EBUSY; |
| 167 | } |
| 168 | /* set number of downlink slots according to multislot class */ |
Daniel Willmann | 532a4b5 | 2014-08-07 12:39:26 +0200 | [diff] [blame] | 169 | dl_tbf = tbf_alloc_dl_tbf(bts, ul_tbf, tfi, trx, ms_class, ss); |
| 170 | if (!dl_tbf) { |
Holger Hans Peter Freyther | 90b87ea | 2013-10-27 10:38:31 +0100 | [diff] [blame] | 171 | LOGP(DRLCMAC, LOGL_NOTICE, "No PDCH resource\n"); |
Holger Hans Peter Freyther | 443c822 | 2013-08-24 20:59:46 +0200 | [diff] [blame] | 172 | /* FIXME: send reject */ |
| 173 | return -EBUSY; |
| 174 | } |
Daniel Willmann | 532a4b5 | 2014-08-07 12:39:26 +0200 | [diff] [blame] | 175 | dl_tbf->m_tlli = tlli; |
| 176 | dl_tbf->m_tlli_valid = 1; |
| 177 | dl_tbf->ta = ta; |
Holger Hans Peter Freyther | 443c822 | 2013-08-24 20:59:46 +0200 | [diff] [blame] | 178 | |
Daniel Willmann | 532a4b5 | 2014-08-07 12:39:26 +0200 | [diff] [blame] | 179 | LOGP(DRLCMAC, LOGL_DEBUG, "%s [DOWNLINK] START\n", tbf_name(dl_tbf)); |
Holger Hans Peter Freyther | 443c822 | 2013-08-24 20:59:46 +0200 | [diff] [blame] | 180 | |
| 181 | /* new TBF, so put first frame */ |
Daniel Willmann | 532a4b5 | 2014-08-07 12:39:26 +0200 | [diff] [blame] | 182 | dl_tbf->m_llc.put_frame(data, len); |
| 183 | dl_tbf->bts->llc_frame_sched(); |
Holger Hans Peter Freyther | 443c822 | 2013-08-24 20:59:46 +0200 | [diff] [blame] | 184 | |
Holger Hans Peter Freyther | 5464c9b | 2013-10-27 20:57:35 +0100 | [diff] [blame] | 185 | /* Store IMSI for later look-up and PCH retransmission */ |
Daniel Willmann | 532a4b5 | 2014-08-07 12:39:26 +0200 | [diff] [blame] | 186 | dl_tbf->assign_imsi(imsi); |
Holger Hans Peter Freyther | 5464c9b | 2013-10-27 20:57:35 +0100 | [diff] [blame] | 187 | |
Holger Hans Peter Freyther | 443c822 | 2013-08-24 20:59:46 +0200 | [diff] [blame] | 188 | /* trigger downlink assignment and set state to ASSIGN. |
| 189 | * we don't use old_downlink, so the possible uplink is used |
| 190 | * to trigger downlink assignment. if there is no uplink, |
| 191 | * AGCH is used. */ |
Daniel Willmann | 532a4b5 | 2014-08-07 12:39:26 +0200 | [diff] [blame] | 192 | dl_tbf->bts->trigger_dl_ass(dl_tbf, old_ul_tbf, imsi); |
Holger Hans Peter Freyther | 443c822 | 2013-08-24 20:59:46 +0200 | [diff] [blame] | 193 | return 0; |
| 194 | } |
| 195 | |
Holger Hans Peter Freyther | 17c31ce | 2013-08-24 18:31:27 +0200 | [diff] [blame] | 196 | /** |
| 197 | * TODO: split into unit test-able parts... |
| 198 | */ |
Daniel Willmann | 3016888 | 2014-08-07 12:48:29 +0200 | [diff] [blame] | 199 | int gprs_rlcmac_dl_tbf::handle(struct gprs_rlcmac_bts *bts, |
Holger Hans Peter Freyther | 17c31ce | 2013-08-24 18:31:27 +0200 | [diff] [blame] | 200 | const uint32_t tlli, const char *imsi, |
Holger Hans Peter Freyther | 31d0df9 | 2013-08-24 20:42:45 +0200 | [diff] [blame] | 201 | const uint8_t ms_class, const uint16_t delay_csec, |
Holger Hans Peter Freyther | 17c31ce | 2013-08-24 18:31:27 +0200 | [diff] [blame] | 202 | const uint8_t *data, const uint16_t len) |
| 203 | { |
Daniel Willmann | 2354402 | 2014-07-30 19:12:27 +0200 | [diff] [blame] | 204 | struct gprs_rlcmac_dl_tbf *dl_tbf; |
Holger Hans Peter Freyther | 17c31ce | 2013-08-24 18:31:27 +0200 | [diff] [blame] | 205 | |
| 206 | /* check for existing TBF */ |
Daniel Willmann | 2354402 | 2014-07-30 19:12:27 +0200 | [diff] [blame] | 207 | dl_tbf = tbf_lookup_dl(bts->bts, tlli, imsi); |
| 208 | if (dl_tbf) { |
| 209 | int rc = dl_tbf->append_data(ms_class, delay_csec, data, len); |
Holger Hans Peter Freyther | 443c822 | 2013-08-24 20:59:46 +0200 | [diff] [blame] | 210 | if (rc >= 0) |
Daniel Willmann | 2354402 | 2014-07-30 19:12:27 +0200 | [diff] [blame] | 211 | dl_tbf->assign_imsi(imsi); |
Holger Hans Peter Freyther | 443c822 | 2013-08-24 20:59:46 +0200 | [diff] [blame] | 212 | return rc; |
| 213 | } |
Holger Hans Peter Freyther | 17c31ce | 2013-08-24 18:31:27 +0200 | [diff] [blame] | 214 | |
Holger Hans Peter Freyther | 443c822 | 2013-08-24 20:59:46 +0200 | [diff] [blame] | 215 | return tbf_new_dl_assignment(bts, imsi, tlli, ms_class, data, len); |
Holger Hans Peter Freyther | 17c31ce | 2013-08-24 18:31:27 +0200 | [diff] [blame] | 216 | } |
Holger Hans Peter Freyther | 8692128 | 2013-08-24 21:26:42 +0200 | [diff] [blame] | 217 | |
Daniel Willmann | 0d12a2f | 2014-07-10 17:44:07 +0200 | [diff] [blame] | 218 | 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] | 219 | int8_t use_trx, uint8_t ms_class, |
| 220 | uint32_t tlli, uint8_t ta, struct gprs_rlcmac_tbf *dl_tbf) |
| 221 | { |
| 222 | uint8_t trx; |
Daniel Willmann | 0d12a2f | 2014-07-10 17:44:07 +0200 | [diff] [blame] | 223 | struct gprs_rlcmac_ul_tbf *tbf; |
Holger Hans Peter Freyther | 5697b4c | 2013-11-11 16:22:39 +0100 | [diff] [blame] | 224 | int8_t tfi; /* must be signed */ |
Holger Hans Peter Freyther | 8692128 | 2013-08-24 21:26:42 +0200 | [diff] [blame] | 225 | |
| 226 | #warning "Copy and paste with tbf_new_dl_assignment" |
Holger Hans Peter Freyther | ba26368 | 2013-12-25 19:15:57 +0100 | [diff] [blame] | 227 | /* create new TBF, use same TRX as DL TBF */ |
Holger Hans Peter Freyther | 70ddde6 | 2013-10-26 19:17:58 +0200 | [diff] [blame] | 228 | 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] | 229 | if (tfi < 0) { |
Holger Hans Peter Freyther | 90b87ea | 2013-10-27 10:38:31 +0100 | [diff] [blame] | 230 | LOGP(DRLCMAC, LOGL_NOTICE, "No PDCH resource\n"); |
Holger Hans Peter Freyther | 8692128 | 2013-08-24 21:26:42 +0200 | [diff] [blame] | 231 | /* FIXME: send reject */ |
| 232 | return NULL; |
| 233 | } |
| 234 | /* use multislot class of downlink TBF */ |
Daniel Willmann | 48aa0b0 | 2014-07-16 18:54:10 +0200 | [diff] [blame] | 235 | 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] | 236 | if (!tbf) { |
Holger Hans Peter Freyther | 90b87ea | 2013-10-27 10:38:31 +0100 | [diff] [blame] | 237 | LOGP(DRLCMAC, LOGL_NOTICE, "No PDCH resource\n"); |
Holger Hans Peter Freyther | 8692128 | 2013-08-24 21:26:42 +0200 | [diff] [blame] | 238 | /* FIXME: send reject */ |
| 239 | return NULL; |
| 240 | } |
Holger Hans Peter Freyther | 474685e | 2013-10-27 17:01:14 +0100 | [diff] [blame] | 241 | tbf->m_tlli = tlli; |
| 242 | tbf->m_tlli_valid = 1; /* no contention resolution */ |
Daniel Willmann | 7e994e3 | 2014-08-07 15:49:21 +0200 | [diff] [blame] | 243 | tbf->m_contention_resolution_done = 1; |
Holger Hans Peter Freyther | 8692128 | 2013-08-24 21:26:42 +0200 | [diff] [blame] | 244 | tbf->ta = ta; /* use current TA */ |
| 245 | tbf_new_state(tbf, GPRS_RLCMAC_ASSIGN); |
| 246 | tbf->state_flags |= (1 << GPRS_RLCMAC_FLAG_PACCH); |
| 247 | tbf_timer_start(tbf, 3169, bts->t3169, 0); |
| 248 | |
| 249 | return tbf; |
| 250 | } |
Holger Hans Peter Freyther | 964ddb6 | 2013-10-16 17:53:23 +0200 | [diff] [blame] | 251 | |
Holger Hans Peter Freyther | 4556130 | 2013-10-16 17:55:57 +0200 | [diff] [blame] | 252 | static void tbf_unlink_pdch(struct gprs_rlcmac_tbf *tbf) |
| 253 | { |
Holger Hans Peter Freyther | 4556130 | 2013-10-16 17:55:57 +0200 | [diff] [blame] | 254 | int ts; |
| 255 | |
| 256 | if (tbf->direction == GPRS_RLCMAC_UL_TBF) { |
Holger Hans Peter Freyther | 34f6e5e | 2013-10-27 20:31:47 +0100 | [diff] [blame] | 257 | tbf->trx->ul_tbf[tbf->tfi()] = NULL; |
Daniel Willmann | 17a1d5e | 2014-05-30 20:21:30 +0200 | [diff] [blame] | 258 | for (ts = 0; ts < 8; ts++) |
Holger Hans Peter Freyther | 4556130 | 2013-10-16 17:55:57 +0200 | [diff] [blame] | 259 | tbf->pdch[ts] = NULL; |
Holger Hans Peter Freyther | 4556130 | 2013-10-16 17:55:57 +0200 | [diff] [blame] | 260 | } else { |
Holger Hans Peter Freyther | 34f6e5e | 2013-10-27 20:31:47 +0100 | [diff] [blame] | 261 | tbf->trx->dl_tbf[tbf->tfi()] = NULL; |
Daniel Willmann | 17a1d5e | 2014-05-30 20:21:30 +0200 | [diff] [blame] | 262 | for (ts = 0; ts < 8; ts++) |
Holger Hans Peter Freyther | 4556130 | 2013-10-16 17:55:57 +0200 | [diff] [blame] | 263 | tbf->pdch[ts] = NULL; |
Holger Hans Peter Freyther | 4556130 | 2013-10-16 17:55:57 +0200 | [diff] [blame] | 264 | } |
| 265 | } |
| 266 | |
| 267 | void tbf_free(struct gprs_rlcmac_tbf *tbf) |
| 268 | { |
Holger Hans Peter Freyther | 4556130 | 2013-10-16 17:55:57 +0200 | [diff] [blame] | 269 | /* Give final measurement report */ |
| 270 | gprs_rlcmac_rssi_rep(tbf); |
| 271 | gprs_rlcmac_lost_rep(tbf); |
| 272 | |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 273 | LOGP(DRLCMAC, LOGL_INFO, "%s free\n", tbf_name(tbf)); |
Holger Hans Peter Freyther | 4556130 | 2013-10-16 17:55:57 +0200 | [diff] [blame] | 274 | if (tbf->ul_ass_state != GPRS_RLCMAC_UL_ASS_NONE) |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 275 | LOGP(DRLCMAC, LOGL_ERROR, "%s Software error: Pending uplink " |
Holger Hans Peter Freyther | 4556130 | 2013-10-16 17:55:57 +0200 | [diff] [blame] | 276 | "assignment. This may not happen, because the " |
| 277 | "assignment message never gets transmitted. Please " |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 278 | "be sure not to free in this state. PLEASE FIX!\n", |
| 279 | tbf_name(tbf)); |
Holger Hans Peter Freyther | 4556130 | 2013-10-16 17:55:57 +0200 | [diff] [blame] | 280 | if (tbf->dl_ass_state != GPRS_RLCMAC_DL_ASS_NONE) |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 281 | LOGP(DRLCMAC, LOGL_ERROR, "%s Software error: Pending downlink " |
Holger Hans Peter Freyther | 4556130 | 2013-10-16 17:55:57 +0200 | [diff] [blame] | 282 | "assignment. This may not happen, because the " |
| 283 | "assignment message never gets transmitted. Please " |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 284 | "be sure not to free in this state. PLEASE FIX!\n", |
| 285 | tbf_name(tbf)); |
Holger Hans Peter Freyther | 86300bb | 2013-10-26 18:01:35 +0200 | [diff] [blame] | 286 | tbf->stop_timer(); |
Holger Hans Peter Freyther | 782f6dd | 2013-10-26 18:31:51 +0200 | [diff] [blame] | 287 | #warning "TODO: Could/Should generate bssgp_tx_llc_discarded" |
Holger Hans Peter Freyther | 758dc12 | 2013-11-06 20:39:45 +0100 | [diff] [blame] | 288 | tbf->m_llc.clear(tbf->bts); |
Holger Hans Peter Freyther | 4556130 | 2013-10-16 17:55:57 +0200 | [diff] [blame] | 289 | tbf_unlink_pdch(tbf); |
Daniel Willmann | 1b3864f | 2014-07-30 13:25:19 +0200 | [diff] [blame] | 290 | llist_del(&tbf->list.list); |
Holger Hans Peter Freyther | 1587764 | 2013-10-27 09:50:15 +0100 | [diff] [blame] | 291 | |
| 292 | if (tbf->direction == GPRS_RLCMAC_UL_TBF) |
| 293 | tbf->bts->tbf_ul_freed(); |
| 294 | else |
| 295 | tbf->bts->tbf_dl_freed(); |
| 296 | |
Holger Hans Peter Freyther | 4556130 | 2013-10-16 17:55:57 +0200 | [diff] [blame] | 297 | LOGP(DRLCMAC, LOGL_DEBUG, "********** TBF ends here **********\n"); |
| 298 | talloc_free(tbf); |
| 299 | } |
| 300 | |
Holger Hans Peter Freyther | aa9c326 | 2013-10-26 17:49:36 +0200 | [diff] [blame] | 301 | int gprs_rlcmac_tbf::update() |
Holger Hans Peter Freyther | 4556130 | 2013-10-16 17:55:57 +0200 | [diff] [blame] | 302 | { |
Holger Hans Peter Freyther | 4556130 | 2013-10-16 17:55:57 +0200 | [diff] [blame] | 303 | struct gprs_rlcmac_tbf *ul_tbf = NULL; |
Holger Hans Peter Freyther | aa9c326 | 2013-10-26 17:49:36 +0200 | [diff] [blame] | 304 | struct gprs_rlcmac_bts *bts_data = bts->bts_data(); |
Holger Hans Peter Freyther | 4556130 | 2013-10-16 17:55:57 +0200 | [diff] [blame] | 305 | int rc; |
| 306 | |
| 307 | LOGP(DRLCMAC, LOGL_DEBUG, "********** TBF update **********\n"); |
| 308 | |
Holger Hans Peter Freyther | aa9c326 | 2013-10-26 17:49:36 +0200 | [diff] [blame] | 309 | if (direction != GPRS_RLCMAC_DL_TBF) |
Holger Hans Peter Freyther | 4556130 | 2013-10-16 17:55:57 +0200 | [diff] [blame] | 310 | return -EINVAL; |
| 311 | |
Daniel Willmann | b59d61b | 2014-07-02 17:58:14 +0200 | [diff] [blame] | 312 | ul_tbf = bts->ul_tbf_by_tlli(m_tlli); |
Holger Hans Peter Freyther | 4556130 | 2013-10-16 17:55:57 +0200 | [diff] [blame] | 313 | |
Holger Hans Peter Freyther | aa9c326 | 2013-10-26 17:49:36 +0200 | [diff] [blame] | 314 | tbf_unlink_pdch(this); |
| 315 | 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] | 316 | /* if no resource */ |
Holger Hans Peter Freyther | 4556130 | 2013-10-16 17:55:57 +0200 | [diff] [blame] | 317 | if (rc < 0) { |
Holger Hans Peter Freyther | 90b87ea | 2013-10-27 10:38:31 +0100 | [diff] [blame] | 318 | LOGP(DRLCMAC, LOGL_ERROR, "No resource after update???\n"); |
Holger Hans Peter Freyther | 4556130 | 2013-10-16 17:55:57 +0200 | [diff] [blame] | 319 | return -rc; |
| 320 | } |
| 321 | |
| 322 | return 0; |
| 323 | } |
| 324 | |
| 325 | int tbf_assign_control_ts(struct gprs_rlcmac_tbf *tbf) |
| 326 | { |
| 327 | if (tbf->control_ts == 0xff) |
| 328 | LOGP(DRLCMAC, LOGL_INFO, "- Setting Control TS %d\n", |
| 329 | tbf->first_common_ts); |
| 330 | else if (tbf->control_ts != tbf->first_common_ts) |
| 331 | LOGP(DRLCMAC, LOGL_INFO, "- Changing Control TS %d\n", |
| 332 | tbf->first_common_ts); |
| 333 | tbf->control_ts = tbf->first_common_ts; |
| 334 | |
| 335 | return 0; |
| 336 | } |
| 337 | |
| 338 | static const char *tbf_state_name[] = { |
| 339 | "NULL", |
| 340 | "ASSIGN", |
| 341 | "FLOW", |
| 342 | "FINISHED", |
| 343 | "WAIT RELEASE", |
| 344 | "RELEASING", |
| 345 | }; |
| 346 | |
| 347 | void tbf_new_state(struct gprs_rlcmac_tbf *tbf, |
| 348 | enum gprs_rlcmac_tbf_state state) |
| 349 | { |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 350 | LOGP(DRLCMAC, LOGL_DEBUG, "%s changes state from %s to %s\n", |
| 351 | tbf_name(tbf), |
Holger Hans Peter Freyther | 4556130 | 2013-10-16 17:55:57 +0200 | [diff] [blame] | 352 | tbf_state_name[tbf->state], tbf_state_name[state]); |
Holger Hans Peter Freyther | 1c344e2 | 2013-10-16 18:33:18 +0200 | [diff] [blame] | 353 | tbf->set_state(state); |
Holger Hans Peter Freyther | 4556130 | 2013-10-16 17:55:57 +0200 | [diff] [blame] | 354 | } |
| 355 | |
| 356 | void tbf_timer_start(struct gprs_rlcmac_tbf *tbf, unsigned int T, |
| 357 | unsigned int seconds, unsigned int microseconds) |
| 358 | { |
| 359 | if (!osmo_timer_pending(&tbf->timer)) |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 360 | LOGP(DRLCMAC, LOGL_DEBUG, "%s starting timer %u.\n", |
| 361 | tbf_name(tbf), T); |
Holger Hans Peter Freyther | 4556130 | 2013-10-16 17:55:57 +0200 | [diff] [blame] | 362 | else |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 363 | LOGP(DRLCMAC, LOGL_DEBUG, "%s restarting timer %u " |
Holger Hans Peter Freyther | 4556130 | 2013-10-16 17:55:57 +0200 | [diff] [blame] | 364 | "while old timer %u pending \n", |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 365 | tbf_name(tbf), T, tbf->T); |
Holger Hans Peter Freyther | 4556130 | 2013-10-16 17:55:57 +0200 | [diff] [blame] | 366 | |
| 367 | tbf->T = T; |
| 368 | tbf->num_T_exp = 0; |
| 369 | |
| 370 | /* Tunning timers can be safely re-scheduled. */ |
| 371 | tbf->timer.data = tbf; |
| 372 | tbf->timer.cb = &tbf_timer_cb; |
| 373 | |
| 374 | osmo_timer_schedule(&tbf->timer, seconds, microseconds); |
| 375 | } |
| 376 | |
Holger Hans Peter Freyther | 86300bb | 2013-10-26 18:01:35 +0200 | [diff] [blame] | 377 | void gprs_rlcmac_tbf::stop_t3191() |
Holger Hans Peter Freyther | 4556130 | 2013-10-16 17:55:57 +0200 | [diff] [blame] | 378 | { |
Holger Hans Peter Freyther | 86300bb | 2013-10-26 18:01:35 +0200 | [diff] [blame] | 379 | return stop_timer(); |
| 380 | } |
| 381 | |
| 382 | void gprs_rlcmac_tbf::stop_timer() |
| 383 | { |
| 384 | if (osmo_timer_pending(&timer)) { |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 385 | LOGP(DRLCMAC, LOGL_DEBUG, "%s stopping timer %u.\n", |
| 386 | tbf_name(this), T); |
Holger Hans Peter Freyther | 86300bb | 2013-10-26 18:01:35 +0200 | [diff] [blame] | 387 | osmo_timer_del(&timer); |
Holger Hans Peter Freyther | 4556130 | 2013-10-16 17:55:57 +0200 | [diff] [blame] | 388 | } |
| 389 | } |
| 390 | |
Holger Hans Peter Freyther | d9262b3 | 2013-10-26 20:12:59 +0200 | [diff] [blame] | 391 | void gprs_rlcmac_tbf::poll_timeout() |
| 392 | { |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 393 | LOGP(DRLCMAC, LOGL_NOTICE, "%s poll timeout\n", |
| 394 | tbf_name(this)); |
Holger Hans Peter Freyther | d9262b3 | 2013-10-26 20:12:59 +0200 | [diff] [blame] | 395 | |
| 396 | poll_state = GPRS_RLCMAC_POLL_NONE; |
| 397 | |
| 398 | if (ul_ack_state == GPRS_RLCMAC_UL_ACK_WAIT_ACK) { |
| 399 | if (!(state_flags & (1 << GPRS_RLCMAC_FLAG_TO_UL_ACK))) { |
| 400 | LOGP(DRLCMAC, LOGL_NOTICE, "- Timeout for polling " |
| 401 | "PACKET CONTROL ACK for PACKET UPLINK ACK\n"); |
| 402 | rlcmac_diag(); |
| 403 | state_flags |= (1 << GPRS_RLCMAC_FLAG_TO_UL_ACK); |
| 404 | } |
| 405 | ul_ack_state = GPRS_RLCMAC_UL_ACK_NONE; |
Holger Hans Peter Freyther | d9262b3 | 2013-10-26 20:12:59 +0200 | [diff] [blame] | 406 | if (state_is(GPRS_RLCMAC_FINISHED)) { |
Daniel Willmann | 6a16e0c | 2014-08-07 13:03:35 +0200 | [diff] [blame] | 407 | gprs_rlcmac_ul_tbf *ul_tbf = static_cast<gprs_rlcmac_ul_tbf *>(this); |
Daniel Willmann | 7e994e3 | 2014-08-07 15:49:21 +0200 | [diff] [blame] | 408 | ul_tbf->m_n3103++; |
| 409 | if (ul_tbf->m_n3103 == ul_tbf->bts->bts_data()->n3103) { |
Holger Hans Peter Freyther | d9262b3 | 2013-10-26 20:12:59 +0200 | [diff] [blame] | 410 | LOGP(DRLCMAC, LOGL_NOTICE, |
| 411 | "- N3103 exceeded\n"); |
Daniel Willmann | 6a16e0c | 2014-08-07 13:03:35 +0200 | [diff] [blame] | 412 | tbf_new_state(ul_tbf, GPRS_RLCMAC_RELEASING); |
| 413 | tbf_timer_start(ul_tbf, 3169, ul_tbf->bts->bts_data()->t3169, 0); |
Holger Hans Peter Freyther | d9262b3 | 2013-10-26 20:12:59 +0200 | [diff] [blame] | 414 | return; |
| 415 | } |
| 416 | /* reschedule UL ack */ |
Daniel Willmann | 6a16e0c | 2014-08-07 13:03:35 +0200 | [diff] [blame] | 417 | ul_tbf->ul_ack_state = GPRS_RLCMAC_UL_ACK_SEND_ACK; |
Holger Hans Peter Freyther | d9262b3 | 2013-10-26 20:12:59 +0200 | [diff] [blame] | 418 | } |
| 419 | } else if (ul_ass_state == GPRS_RLCMAC_UL_ASS_WAIT_ACK) { |
| 420 | if (!(state_flags & (1 << GPRS_RLCMAC_FLAG_TO_UL_ASS))) { |
| 421 | LOGP(DRLCMAC, LOGL_NOTICE, "- Timeout for polling " |
| 422 | "PACKET CONTROL ACK for PACKET UPLINK " |
| 423 | "ASSIGNMENT.\n"); |
| 424 | rlcmac_diag(); |
| 425 | state_flags |= (1 << GPRS_RLCMAC_FLAG_TO_UL_ASS); |
| 426 | } |
| 427 | ul_ass_state = GPRS_RLCMAC_UL_ASS_NONE; |
Holger Hans Peter Freyther | d9262b3 | 2013-10-26 20:12:59 +0200 | [diff] [blame] | 428 | n3105++; |
| 429 | if (n3105 == bts_data()->n3105) { |
| 430 | LOGP(DRLCMAC, LOGL_NOTICE, "- N3105 exceeded\n"); |
Holger Hans Peter Freyther | d9262b3 | 2013-10-26 20:12:59 +0200 | [diff] [blame] | 431 | tbf_new_state(this, GPRS_RLCMAC_RELEASING); |
| 432 | tbf_timer_start(this, 3195, bts_data()->t3195, 0); |
| 433 | return; |
| 434 | } |
| 435 | /* reschedule UL assignment */ |
| 436 | ul_ass_state = GPRS_RLCMAC_UL_ASS_SEND_ASS; |
| 437 | } else if (dl_ass_state == GPRS_RLCMAC_DL_ASS_WAIT_ACK) { |
| 438 | if (!(state_flags & (1 << GPRS_RLCMAC_FLAG_TO_DL_ASS))) { |
| 439 | LOGP(DRLCMAC, LOGL_NOTICE, "- Timeout for polling " |
| 440 | "PACKET CONTROL ACK for PACKET DOWNLINK " |
| 441 | "ASSIGNMENT.\n"); |
| 442 | rlcmac_diag(); |
| 443 | state_flags |= (1 << GPRS_RLCMAC_FLAG_TO_DL_ASS); |
| 444 | } |
| 445 | dl_ass_state = GPRS_RLCMAC_DL_ASS_NONE; |
Holger Hans Peter Freyther | d9262b3 | 2013-10-26 20:12:59 +0200 | [diff] [blame] | 446 | n3105++; |
| 447 | if (n3105 == bts->bts_data()->n3105) { |
| 448 | LOGP(DRLCMAC, LOGL_NOTICE, "- N3105 exceeded\n"); |
Holger Hans Peter Freyther | d9262b3 | 2013-10-26 20:12:59 +0200 | [diff] [blame] | 449 | tbf_new_state(this, GPRS_RLCMAC_RELEASING); |
| 450 | tbf_timer_start(this, 3195, bts_data()->t3195, 0); |
| 451 | return; |
| 452 | } |
| 453 | /* reschedule DL assignment */ |
| 454 | dl_ass_state = GPRS_RLCMAC_DL_ASS_SEND_ASS; |
| 455 | } else if (direction == GPRS_RLCMAC_DL_TBF) { |
Daniel Willmann | 6a16e0c | 2014-08-07 13:03:35 +0200 | [diff] [blame] | 456 | gprs_rlcmac_dl_tbf *dl_tbf = static_cast<gprs_rlcmac_dl_tbf *>(this); |
| 457 | |
| 458 | if (!(dl_tbf->state_flags & (1 << GPRS_RLCMAC_FLAG_TO_DL_ACK))) { |
Holger Hans Peter Freyther | d9262b3 | 2013-10-26 20:12:59 +0200 | [diff] [blame] | 459 | LOGP(DRLCMAC, LOGL_NOTICE, "- Timeout for polling " |
| 460 | "PACKET DOWNLINK ACK.\n"); |
Daniel Willmann | 6a16e0c | 2014-08-07 13:03:35 +0200 | [diff] [blame] | 461 | dl_tbf->rlcmac_diag(); |
| 462 | dl_tbf->state_flags |= (1 << GPRS_RLCMAC_FLAG_TO_DL_ACK); |
Holger Hans Peter Freyther | d9262b3 | 2013-10-26 20:12:59 +0200 | [diff] [blame] | 463 | } |
Daniel Willmann | 6a16e0c | 2014-08-07 13:03:35 +0200 | [diff] [blame] | 464 | dl_tbf->n3105++; |
| 465 | if (dl_tbf->n3105 == dl_tbf->bts->bts_data()->n3105) { |
Holger Hans Peter Freyther | d9262b3 | 2013-10-26 20:12:59 +0200 | [diff] [blame] | 466 | LOGP(DRLCMAC, LOGL_NOTICE, "- N3105 exceeded\n"); |
Daniel Willmann | 6a16e0c | 2014-08-07 13:03:35 +0200 | [diff] [blame] | 467 | tbf_new_state(dl_tbf, GPRS_RLCMAC_RELEASING); |
| 468 | tbf_timer_start(dl_tbf, 3195, dl_tbf->bts_data()->t3195, 0); |
Holger Hans Peter Freyther | d9262b3 | 2013-10-26 20:12:59 +0200 | [diff] [blame] | 469 | return; |
| 470 | } |
| 471 | /* resend IMM.ASS on CCCH on timeout */ |
Daniel Willmann | 6a16e0c | 2014-08-07 13:03:35 +0200 | [diff] [blame] | 472 | if ((dl_tbf->state_flags & (1 << GPRS_RLCMAC_FLAG_CCCH)) |
| 473 | && !(dl_tbf->state_flags & (1 << GPRS_RLCMAC_FLAG_DL_ACK))) { |
Holger Hans Peter Freyther | d9262b3 | 2013-10-26 20:12:59 +0200 | [diff] [blame] | 474 | LOGP(DRLCMAC, LOGL_DEBUG, "Re-send dowlink assignment " |
Holger Hans Peter Freyther | 34f6e5e | 2013-10-27 20:31:47 +0100 | [diff] [blame] | 475 | "for %s on PCH (IMSI=%s)\n", |
Daniel Willmann | 6a16e0c | 2014-08-07 13:03:35 +0200 | [diff] [blame] | 476 | tbf_name(dl_tbf), |
Holger Hans Peter Freyther | 5464c9b | 2013-10-27 20:57:35 +0100 | [diff] [blame] | 477 | m_imsi); |
Holger Hans Peter Freyther | d9262b3 | 2013-10-26 20:12:59 +0200 | [diff] [blame] | 478 | /* send immediate assignment */ |
Daniel Willmann | 6a16e0c | 2014-08-07 13:03:35 +0200 | [diff] [blame] | 479 | dl_tbf->bts->snd_dl_ass(dl_tbf, 0, m_imsi); |
Daniel Willmann | 7e994e3 | 2014-08-07 15:49:21 +0200 | [diff] [blame] | 480 | dl_tbf->m_wait_confirm = 1; |
Holger Hans Peter Freyther | d9262b3 | 2013-10-26 20:12:59 +0200 | [diff] [blame] | 481 | } |
| 482 | } else |
| 483 | LOGP(DRLCMAC, LOGL_ERROR, "- Poll Timeout, but no event!\n"); |
| 484 | } |
| 485 | |
Daniel Willmann | 48aa0b0 | 2014-07-16 18:54:10 +0200 | [diff] [blame] | 486 | static int setup_tbf(struct gprs_rlcmac_tbf *tbf, struct gprs_rlcmac_bts *bts, |
| 487 | 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] | 488 | uint8_t ms_class, uint8_t single_slot) |
| 489 | { |
Holger Hans Peter Freyther | 7380bab | 2013-10-16 18:09:19 +0200 | [diff] [blame] | 490 | int rc; |
| 491 | |
Holger Hans Peter Freyther | 7380bab | 2013-10-16 18:09:19 +0200 | [diff] [blame] | 492 | if (trx >= 8 || tfi >= 32) |
Daniel Willmann | 48aa0b0 | 2014-07-16 18:54:10 +0200 | [diff] [blame] | 493 | return -1; |
Daniel Willmann | 078bb71 | 2014-07-10 17:44:06 +0200 | [diff] [blame] | 494 | |
Holger Hans Peter Freyther | 7380bab | 2013-10-16 18:09:19 +0200 | [diff] [blame] | 495 | if (!tbf) |
Daniel Willmann | 48aa0b0 | 2014-07-16 18:54:10 +0200 | [diff] [blame] | 496 | return -1; |
Holger Hans Peter Freyther | 7380bab | 2013-10-16 18:09:19 +0200 | [diff] [blame] | 497 | |
Daniel Willmann | 1b3864f | 2014-07-30 13:25:19 +0200 | [diff] [blame] | 498 | /* Back pointer for PODS llist compatibility */ |
| 499 | tbf->list.back = tbf; |
| 500 | |
Holger Hans Peter Freyther | a004799 | 2014-01-16 10:07:20 +0100 | [diff] [blame] | 501 | tbf->m_created_ts = time(NULL); |
Holger Hans Peter Freyther | 9f0c1d2 | 2013-10-19 21:24:34 +0200 | [diff] [blame] | 502 | tbf->bts = bts->bts; |
Holger Hans Peter Freyther | 34f6e5e | 2013-10-27 20:31:47 +0100 | [diff] [blame] | 503 | tbf->m_tfi = tfi; |
Holger Hans Peter Freyther | 743bafa | 2013-09-29 07:50:50 +0200 | [diff] [blame] | 504 | tbf->trx = &bts->trx[trx]; |
Holger Hans Peter Freyther | 7380bab | 2013-10-16 18:09:19 +0200 | [diff] [blame] | 505 | tbf->ms_class = ms_class; |
Holger Hans Peter Freyther | 7380bab | 2013-10-16 18:09:19 +0200 | [diff] [blame] | 506 | /* select algorithm */ |
| 507 | rc = bts->alloc_algorithm(bts, old_tbf, tbf, bts->alloc_algorithm_curst, |
| 508 | single_slot); |
Holger Hans Peter Freyther | 90b87ea | 2013-10-27 10:38:31 +0100 | [diff] [blame] | 509 | /* if no resource */ |
Holger Hans Peter Freyther | 7380bab | 2013-10-16 18:09:19 +0200 | [diff] [blame] | 510 | if (rc < 0) { |
Daniel Willmann | 48aa0b0 | 2014-07-16 18:54:10 +0200 | [diff] [blame] | 511 | return -1; |
Holger Hans Peter Freyther | 7380bab | 2013-10-16 18:09:19 +0200 | [diff] [blame] | 512 | } |
| 513 | /* assign control ts */ |
| 514 | tbf->control_ts = 0xff; |
| 515 | rc = tbf_assign_control_ts(tbf); |
Holger Hans Peter Freyther | 90b87ea | 2013-10-27 10:38:31 +0100 | [diff] [blame] | 516 | /* if no resource */ |
Holger Hans Peter Freyther | 7380bab | 2013-10-16 18:09:19 +0200 | [diff] [blame] | 517 | if (rc < 0) { |
Daniel Willmann | 48aa0b0 | 2014-07-16 18:54:10 +0200 | [diff] [blame] | 518 | return -1; |
Holger Hans Peter Freyther | 7380bab | 2013-10-16 18:09:19 +0200 | [diff] [blame] | 519 | } |
| 520 | |
| 521 | /* set timestamp */ |
| 522 | gettimeofday(&tbf->meas.dl_bw_tv, NULL); |
| 523 | gettimeofday(&tbf->meas.rssi_tv, NULL); |
| 524 | gettimeofday(&tbf->meas.dl_loss_tv, NULL); |
| 525 | |
Holger Hans Peter Freyther | 758dc12 | 2013-11-06 20:39:45 +0100 | [diff] [blame] | 526 | tbf->m_llc.init(); |
Daniel Willmann | 48aa0b0 | 2014-07-16 18:54:10 +0200 | [diff] [blame] | 527 | return 0; |
| 528 | } |
| 529 | |
| 530 | |
| 531 | struct gprs_rlcmac_ul_tbf *tbf_alloc_ul_tbf(struct gprs_rlcmac_bts *bts, |
| 532 | struct gprs_rlcmac_tbf *old_tbf, uint8_t tfi, uint8_t trx, |
| 533 | uint8_t ms_class, uint8_t single_slot) |
| 534 | { |
| 535 | struct gprs_rlcmac_ul_tbf *tbf; |
| 536 | int rc; |
| 537 | |
| 538 | LOGP(DRLCMAC, LOGL_DEBUG, "********** TBF starts here **********\n"); |
| 539 | LOGP(DRLCMAC, LOGL_INFO, "Allocating %s TBF: TFI=%d TRX=%d " |
| 540 | "MS_CLASS=%d\n", "UL", tfi, trx, ms_class); |
| 541 | |
| 542 | if (trx >= 8 || tfi >= 32) |
| 543 | return NULL; |
| 544 | |
| 545 | tbf = talloc_zero(tall_pcu_ctx, struct gprs_rlcmac_ul_tbf); |
| 546 | |
| 547 | if (!tbf) |
| 548 | return NULL; |
| 549 | |
| 550 | tbf->direction = GPRS_RLCMAC_UL_TBF; |
| 551 | rc = setup_tbf(tbf, bts, old_tbf, tfi, trx, ms_class, single_slot); |
| 552 | /* if no resource */ |
| 553 | if (rc < 0) { |
| 554 | talloc_free(tbf); |
| 555 | return NULL; |
Holger Hans Peter Freyther | 1587764 | 2013-10-27 09:50:15 +0100 | [diff] [blame] | 556 | } |
Holger Hans Peter Freyther | 7380bab | 2013-10-16 18:09:19 +0200 | [diff] [blame] | 557 | |
Daniel Willmann | 1b3864f | 2014-07-30 13:25:19 +0200 | [diff] [blame] | 558 | llist_add(&tbf->list.list, &bts->ul_tbfs); |
Daniel Willmann | 48aa0b0 | 2014-07-16 18:54:10 +0200 | [diff] [blame] | 559 | tbf->bts->tbf_ul_created(); |
| 560 | |
| 561 | return tbf; |
| 562 | } |
| 563 | |
| 564 | struct gprs_rlcmac_dl_tbf *tbf_alloc_dl_tbf(struct gprs_rlcmac_bts *bts, |
| 565 | struct gprs_rlcmac_tbf *old_tbf, uint8_t tfi, uint8_t trx, |
| 566 | uint8_t ms_class, uint8_t single_slot) |
| 567 | { |
| 568 | struct gprs_rlcmac_dl_tbf *tbf; |
| 569 | int rc; |
| 570 | |
| 571 | LOGP(DRLCMAC, LOGL_DEBUG, "********** TBF starts here **********\n"); |
| 572 | LOGP(DRLCMAC, LOGL_INFO, "Allocating %s TBF: TFI=%d TRX=%d " |
| 573 | "MS_CLASS=%d\n", "DL", tfi, trx, ms_class); |
| 574 | |
| 575 | if (trx >= 8 || tfi >= 32) |
| 576 | return NULL; |
| 577 | |
| 578 | tbf = talloc_zero(tall_pcu_ctx, struct gprs_rlcmac_dl_tbf); |
| 579 | |
| 580 | if (!tbf) |
| 581 | return NULL; |
| 582 | |
| 583 | tbf->direction = GPRS_RLCMAC_DL_TBF; |
| 584 | rc = setup_tbf(tbf, bts, old_tbf, tfi, trx, ms_class, single_slot); |
| 585 | /* if no resource */ |
| 586 | if (rc < 0) { |
| 587 | talloc_free(tbf); |
| 588 | return NULL; |
| 589 | } |
| 590 | |
Daniel Willmann | 1b3864f | 2014-07-30 13:25:19 +0200 | [diff] [blame] | 591 | llist_add(&tbf->list.list, &bts->dl_tbfs); |
Daniel Willmann | 48aa0b0 | 2014-07-16 18:54:10 +0200 | [diff] [blame] | 592 | tbf->bts->tbf_dl_created(); |
| 593 | |
Holger Hans Peter Freyther | 7380bab | 2013-10-16 18:09:19 +0200 | [diff] [blame] | 594 | return tbf; |
| 595 | } |
| 596 | |
Holger Hans Peter Freyther | af8094d | 2013-10-26 17:56:15 +0200 | [diff] [blame] | 597 | static void tbf_timer_cb(void *_tbf) |
Holger Hans Peter Freyther | 7380bab | 2013-10-16 18:09:19 +0200 | [diff] [blame] | 598 | { |
| 599 | struct gprs_rlcmac_tbf *tbf = (struct gprs_rlcmac_tbf *)_tbf; |
Holger Hans Peter Freyther | af8094d | 2013-10-26 17:56:15 +0200 | [diff] [blame] | 600 | tbf->handle_timeout(); |
| 601 | } |
Holger Hans Peter Freyther | 7380bab | 2013-10-16 18:09:19 +0200 | [diff] [blame] | 602 | |
Holger Hans Peter Freyther | af8094d | 2013-10-26 17:56:15 +0200 | [diff] [blame] | 603 | void gprs_rlcmac_tbf::handle_timeout() |
| 604 | { |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 605 | LOGP(DRLCMAC, LOGL_DEBUG, "%s timer %u expired.\n", |
| 606 | tbf_name(this), T); |
Holger Hans Peter Freyther | 7380bab | 2013-10-16 18:09:19 +0200 | [diff] [blame] | 607 | |
Holger Hans Peter Freyther | af8094d | 2013-10-26 17:56:15 +0200 | [diff] [blame] | 608 | num_T_exp++; |
Holger Hans Peter Freyther | 7380bab | 2013-10-16 18:09:19 +0200 | [diff] [blame] | 609 | |
Holger Hans Peter Freyther | af8094d | 2013-10-26 17:56:15 +0200 | [diff] [blame] | 610 | switch (T) { |
Holger Hans Peter Freyther | 7380bab | 2013-10-16 18:09:19 +0200 | [diff] [blame] | 611 | case 0: /* assignment */ |
Holger Hans Peter Freyther | af8094d | 2013-10-26 17:56:15 +0200 | [diff] [blame] | 612 | if ((state_flags & (1 << GPRS_RLCMAC_FLAG_PACCH))) { |
| 613 | if (state_is(GPRS_RLCMAC_ASSIGN)) { |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 614 | LOGP(DRLCMAC, LOGL_NOTICE, "%s releasing due to " |
| 615 | "PACCH assignment timeout.\n", tbf_name(this)); |
Holger Hans Peter Freyther | af8094d | 2013-10-26 17:56:15 +0200 | [diff] [blame] | 616 | tbf_free(this); |
Holger Hans Peter Freyther | 3d0cc2f | 2014-01-16 10:09:42 +0100 | [diff] [blame] | 617 | return; |
Holger Hans Peter Freyther | 7380bab | 2013-10-16 18:09:19 +0200 | [diff] [blame] | 618 | } else |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 619 | LOGP(DRLCMAC, LOGL_ERROR, "Error: %s is not " |
| 620 | "in assign state\n", tbf_name(this)); |
Holger Hans Peter Freyther | 7380bab | 2013-10-16 18:09:19 +0200 | [diff] [blame] | 621 | } |
Holger Hans Peter Freyther | af8094d | 2013-10-26 17:56:15 +0200 | [diff] [blame] | 622 | if ((state_flags & (1 << GPRS_RLCMAC_FLAG_CCCH))) { |
Daniel Willmann | 532a4b5 | 2014-08-07 12:39:26 +0200 | [diff] [blame] | 623 | gprs_rlcmac_dl_tbf *dl_tbf = static_cast<gprs_rlcmac_dl_tbf *>(this); |
Daniel Willmann | 7e994e3 | 2014-08-07 15:49:21 +0200 | [diff] [blame] | 624 | dl_tbf->m_wait_confirm = 0; |
Daniel Willmann | 532a4b5 | 2014-08-07 12:39:26 +0200 | [diff] [blame] | 625 | if (dl_tbf->state_is(GPRS_RLCMAC_ASSIGN)) { |
| 626 | tbf_assign_control_ts(dl_tbf); |
Daniel Willmann | cf1fae7 | 2014-05-30 17:58:01 +0200 | [diff] [blame] | 627 | |
Daniel Willmann | 532a4b5 | 2014-08-07 12:39:26 +0200 | [diff] [blame] | 628 | if (!dl_tbf->upgrade_to_multislot) { |
Daniel Willmann | cf1fae7 | 2014-05-30 17:58:01 +0200 | [diff] [blame] | 629 | /* change state to FLOW, so scheduler |
| 630 | * will start transmission */ |
Daniel Willmann | 532a4b5 | 2014-08-07 12:39:26 +0200 | [diff] [blame] | 631 | tbf_new_state(dl_tbf, GPRS_RLCMAC_FLOW); |
Daniel Willmann | cf1fae7 | 2014-05-30 17:58:01 +0200 | [diff] [blame] | 632 | break; |
| 633 | } |
| 634 | |
| 635 | /* This tbf can be upgraded to use multiple DL |
| 636 | * timeslots and now that there is already one |
| 637 | * slot assigned send another DL assignment via |
| 638 | * PDCH. */ |
| 639 | |
| 640 | /* keep to flags */ |
Daniel Willmann | 532a4b5 | 2014-08-07 12:39:26 +0200 | [diff] [blame] | 641 | dl_tbf->state_flags &= GPRS_RLCMAC_FLAG_TO_MASK; |
| 642 | dl_tbf->state_flags &= ~(1 << GPRS_RLCMAC_FLAG_CCCH); |
Daniel Willmann | cf1fae7 | 2014-05-30 17:58:01 +0200 | [diff] [blame] | 643 | |
Daniel Willmann | 532a4b5 | 2014-08-07 12:39:26 +0200 | [diff] [blame] | 644 | dl_tbf->update(); |
Daniel Willmann | cf1fae7 | 2014-05-30 17:58:01 +0200 | [diff] [blame] | 645 | |
Daniel Willmann | 532a4b5 | 2014-08-07 12:39:26 +0200 | [diff] [blame] | 646 | dl_tbf->bts->trigger_dl_ass(dl_tbf, dl_tbf, NULL); |
Holger Hans Peter Freyther | 7380bab | 2013-10-16 18:09:19 +0200 | [diff] [blame] | 647 | } else |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 648 | LOGP(DRLCMAC, LOGL_NOTICE, "%s Continue flow after " |
Daniel Willmann | 532a4b5 | 2014-08-07 12:39:26 +0200 | [diff] [blame] | 649 | "IMM.ASS confirm\n", tbf_name(dl_tbf)); |
Holger Hans Peter Freyther | 7380bab | 2013-10-16 18:09:19 +0200 | [diff] [blame] | 650 | } |
| 651 | break; |
| 652 | case 3169: |
| 653 | case 3191: |
| 654 | case 3195: |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 655 | LOGP(DRLCMAC, LOGL_NOTICE, "%s T%d timeout during " |
| 656 | "transsmission\n", tbf_name(this), T); |
Holger Hans Peter Freyther | af8094d | 2013-10-26 17:56:15 +0200 | [diff] [blame] | 657 | rlcmac_diag(); |
Holger Hans Peter Freyther | 7380bab | 2013-10-16 18:09:19 +0200 | [diff] [blame] | 658 | /* fall through */ |
| 659 | case 3193: |
Holger Hans Peter Freyther | 8d0e489 | 2013-10-27 12:42:58 +0100 | [diff] [blame] | 660 | LOGP(DRLCMAC, LOGL_DEBUG, |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 661 | "%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] | 662 | /* free TBF */ |
Holger Hans Peter Freyther | af8094d | 2013-10-26 17:56:15 +0200 | [diff] [blame] | 663 | tbf_free(this); |
Holger Hans Peter Freyther | 3d0cc2f | 2014-01-16 10:09:42 +0100 | [diff] [blame] | 664 | return; |
Holger Hans Peter Freyther | 7380bab | 2013-10-16 18:09:19 +0200 | [diff] [blame] | 665 | break; |
| 666 | default: |
Holger Hans Peter Freyther | 8d0e489 | 2013-10-27 12:42:58 +0100 | [diff] [blame] | 667 | LOGP(DRLCMAC, LOGL_ERROR, |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 668 | "%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] | 669 | } |
| 670 | } |
| 671 | |
| 672 | int gprs_rlcmac_tbf::rlcmac_diag() |
| 673 | { |
| 674 | if ((state_flags & (1 << GPRS_RLCMAC_FLAG_CCCH))) |
| 675 | LOGP(DRLCMAC, LOGL_NOTICE, "- Assignment was on CCCH\n"); |
| 676 | if ((state_flags & (1 << GPRS_RLCMAC_FLAG_PACCH))) |
| 677 | LOGP(DRLCMAC, LOGL_NOTICE, "- Assignment was on PACCH\n"); |
| 678 | if ((state_flags & (1 << GPRS_RLCMAC_FLAG_UL_DATA))) |
| 679 | LOGP(DRLCMAC, LOGL_NOTICE, "- Uplink data was received\n"); |
| 680 | else if (direction == GPRS_RLCMAC_UL_TBF) |
| 681 | LOGP(DRLCMAC, LOGL_NOTICE, "- No uplink data received yet\n"); |
| 682 | if ((state_flags & (1 << GPRS_RLCMAC_FLAG_DL_ACK))) |
| 683 | LOGP(DRLCMAC, LOGL_NOTICE, "- Downlink ACK was received\n"); |
| 684 | else if (direction == GPRS_RLCMAC_DL_TBF) |
| 685 | LOGP(DRLCMAC, LOGL_NOTICE, "- No downlink ACK received yet\n"); |
| 686 | |
| 687 | return 0; |
| 688 | } |
| 689 | |
Daniel Willmann | cf706b0 | 2014-08-07 17:35:22 +0200 | [diff] [blame^] | 690 | struct msgb *gprs_rlcmac_dl_tbf::llc_dequeue(bssgp_bvc_ctx *bctx) |
Holger Hans Peter Freyther | 1702f10 | 2013-10-20 08:44:02 +0200 | [diff] [blame] | 691 | { |
| 692 | struct msgb *msg; |
| 693 | struct timeval *tv, tv_now; |
| 694 | uint32_t octets = 0, frames = 0; |
| 695 | |
| 696 | gettimeofday(&tv_now, NULL); |
| 697 | |
Holger Hans Peter Freyther | 758dc12 | 2013-11-06 20:39:45 +0100 | [diff] [blame] | 698 | while ((msg = m_llc.dequeue())) { |
Holger Hans Peter Freyther | 1702f10 | 2013-10-20 08:44:02 +0200 | [diff] [blame] | 699 | tv = (struct timeval *)msg->data; |
| 700 | msgb_pull(msg, sizeof(*tv)); |
Daniel Willmann | 9c62389 | 2013-12-04 18:11:47 +0100 | [diff] [blame] | 701 | msgb_pull(msg, sizeof(*tv)); |
Holger Hans Peter Freyther | 51e093b | 2013-11-13 15:35:45 +0100 | [diff] [blame] | 702 | |
Holger Hans Peter Freyther | b1302b0 | 2013-11-13 17:15:26 +0100 | [diff] [blame] | 703 | if (gprs_llc::is_frame_expired(&tv_now, tv)) { |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 704 | LOGP(DRLCMACDL, LOGL_NOTICE, "%s Discarding LLC PDU " |
Holger Hans Peter Freyther | 550bb88 | 2013-12-04 17:10:54 +0100 | [diff] [blame] | 705 | "because lifetime limit reached. Queue size %zu\n", |
| 706 | tbf_name(this), m_llc.m_queue_size); |
Holger Hans Peter Freyther | b3d5ee2 | 2013-11-13 16:43:26 +0100 | [diff] [blame] | 707 | bts->llc_timedout_frame(); |
Holger Hans Peter Freyther | 1702f10 | 2013-10-20 08:44:02 +0200 | [diff] [blame] | 708 | frames++; |
| 709 | octets += msg->len; |
| 710 | msgb_free(msg); |
| 711 | continue; |
| 712 | } |
| 713 | break; |
| 714 | } |
| 715 | |
| 716 | if (frames) { |
| 717 | if (frames > 0xff) |
| 718 | frames = 0xff; |
| 719 | if (octets > 0xffffff) |
| 720 | octets = 0xffffff; |
Holger Hans Peter Freyther | 474685e | 2013-10-27 17:01:14 +0100 | [diff] [blame] | 721 | bssgp_tx_llc_discarded(bctx, m_tlli, frames, octets); |
Holger Hans Peter Freyther | 1702f10 | 2013-10-20 08:44:02 +0200 | [diff] [blame] | 722 | } |
| 723 | |
| 724 | return msg; |
| 725 | } |
| 726 | |
Holger Hans Peter Freyther | d11290b | 2013-10-26 17:32:04 +0200 | [diff] [blame] | 727 | /* |
| 728 | * Store received block data in LLC message(s) and forward to SGSN |
| 729 | * if complete. |
| 730 | */ |
Daniel Willmann | e2732e2 | 2014-08-07 17:32:01 +0200 | [diff] [blame] | 731 | int gprs_rlcmac_ul_tbf::assemble_forward_llc(const gprs_rlc_data *_data) |
Holger Hans Peter Freyther | d11290b | 2013-10-26 17:32:04 +0200 | [diff] [blame] | 732 | { |
Holger Hans Peter Freyther | e5dc2a0 | 2013-11-13 20:10:12 +0100 | [diff] [blame] | 733 | const uint8_t *data = _data->block; |
| 734 | uint8_t len = _data->len; |
| 735 | 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] | 736 | uint8_t e, m; |
| 737 | struct rlc_li_field *li; |
| 738 | uint8_t frame_offset[16], offset = 0, chunk; |
| 739 | int i, frames = 0; |
| 740 | |
| 741 | LOGP(DRLCMACUL, LOGL_DEBUG, "- Assembling frames: (len=%d)\n", len); |
| 742 | |
| 743 | data += 3; |
| 744 | len -= 3; |
| 745 | e = rh->e; /* if extended */ |
| 746 | m = 1; /* more frames, that means: the first frame */ |
| 747 | |
| 748 | /* Parse frame offsets from length indicator(s), if any. */ |
| 749 | while (1) { |
| 750 | if (frames == (int)sizeof(frame_offset)) { |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 751 | LOGP(DRLCMACUL, LOGL_ERROR, "%s too many frames in " |
| 752 | "block\n", tbf_name(this)); |
Holger Hans Peter Freyther | d11290b | 2013-10-26 17:32:04 +0200 | [diff] [blame] | 753 | return -EINVAL; |
| 754 | } |
| 755 | frame_offset[frames++] = offset; |
| 756 | LOGP(DRLCMACUL, LOGL_DEBUG, "-- Frame %d starts at offset " |
| 757 | "%d\n", frames, offset); |
| 758 | if (!len) |
| 759 | break; |
| 760 | /* M == 0 and E == 0 is not allowed in this version. */ |
| 761 | if (!m && !e) { |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 762 | LOGP(DRLCMACUL, LOGL_NOTICE, "%s UL DATA " |
Holger Hans Peter Freyther | d11290b | 2013-10-26 17:32:04 +0200 | [diff] [blame] | 763 | "ignored, because M='0' and E='0'.\n", |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 764 | tbf_name(this)); |
Holger Hans Peter Freyther | d11290b | 2013-10-26 17:32:04 +0200 | [diff] [blame] | 765 | return 0; |
| 766 | } |
| 767 | /* no more frames in this segment */ |
| 768 | if (e) { |
| 769 | break; |
| 770 | } |
| 771 | /* There is a new frame and an LI that delimits it. */ |
| 772 | if (m) { |
| 773 | li = (struct rlc_li_field *)data; |
| 774 | LOGP(DRLCMACUL, LOGL_DEBUG, "-- Delimiter len=%d\n", |
| 775 | li->li); |
| 776 | /* Special case: LI == 0 |
| 777 | * If the last segment would fit precisely into the |
| 778 | * rest of the RLC MAC block, there would be no way |
| 779 | * to delimit that this segment ends and is not |
| 780 | * continued in the next block. |
| 781 | * The special LI (0) is used to force the segment to |
| 782 | * extend into the next block, so it is delimited there. |
| 783 | * This LI must be skipped. Also it is the last LI. |
| 784 | */ |
| 785 | if (li->li == 0) { |
| 786 | data++; |
| 787 | len--; |
| 788 | m = 1; /* M is ignored, we know there is more */ |
| 789 | break; /* handle E as '1', so we break! */ |
| 790 | } |
| 791 | e = li->e; |
| 792 | m = li->m; |
| 793 | offset += li->li; |
| 794 | data++; |
| 795 | len--; |
| 796 | continue; |
| 797 | } |
| 798 | } |
| 799 | if (!m) { |
| 800 | LOGP(DRLCMACUL, LOGL_DEBUG, "- Last frame carries spare " |
| 801 | "data\n"); |
| 802 | } |
| 803 | |
| 804 | LOGP(DRLCMACUL, LOGL_DEBUG, "- Data length after length fields: %d\n", |
| 805 | len); |
| 806 | /* TLLI */ |
| 807 | if (rh->ti) { |
| 808 | if (len < 4) { |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 809 | LOGP(DRLCMACUL, LOGL_NOTICE, "%s UL DATA TLLI out of " |
| 810 | "frame border\n", tbf_name(this)); |
Holger Hans Peter Freyther | d11290b | 2013-10-26 17:32:04 +0200 | [diff] [blame] | 811 | return -EINVAL; |
| 812 | } |
| 813 | data += 4; |
| 814 | len -= 4; |
| 815 | LOGP(DRLCMACUL, LOGL_DEBUG, "- Length after skipping TLLI: " |
| 816 | "%d\n", len); |
| 817 | } |
| 818 | |
| 819 | /* PFI */ |
| 820 | if (rh->pi) { |
| 821 | LOGP(DRLCMACUL, LOGL_ERROR, "ERROR: PFI not supported, " |
| 822 | "please disable in SYSTEM INFORMATION\n"); |
| 823 | if (len < 1) { |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 824 | LOGP(DRLCMACUL, LOGL_NOTICE, "%s UL DATA PFI out of " |
| 825 | "frame border\n", tbf_name(this)); |
Holger Hans Peter Freyther | d11290b | 2013-10-26 17:32:04 +0200 | [diff] [blame] | 826 | return -EINVAL; |
| 827 | } |
| 828 | data++; |
| 829 | len--; |
| 830 | LOGP(DRLCMACUL, LOGL_DEBUG, "- Length after skipping PFI: " |
| 831 | "%d\n", len); |
| 832 | } |
| 833 | |
| 834 | /* Now we have: |
| 835 | * - a list of frames offsets: frame_offset[] |
| 836 | * - number of frames: i |
| 837 | * - m == 0: Last frame carries spare data (end of TBF). |
| 838 | */ |
| 839 | |
| 840 | /* Check if last offset would exceed frame. */ |
| 841 | if (offset > len) { |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 842 | LOGP(DRLCMACUL, LOGL_NOTICE, "%s UL DATA ignored, " |
Holger Hans Peter Freyther | d11290b | 2013-10-26 17:32:04 +0200 | [diff] [blame] | 843 | "because LI delimits data that exceeds block size.\n", |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 844 | tbf_name(this)); |
Holger Hans Peter Freyther | d11290b | 2013-10-26 17:32:04 +0200 | [diff] [blame] | 845 | return -EINVAL; |
| 846 | } |
| 847 | |
| 848 | /* create LLC frames */ |
| 849 | for (i = 0; i < frames; i++) { |
| 850 | /* last frame ? */ |
| 851 | if (i == frames - 1) { |
| 852 | /* no more data in last frame */ |
| 853 | if (!m) |
| 854 | break; |
| 855 | /* data until end of frame */ |
| 856 | chunk = len - frame_offset[i]; |
| 857 | } else { |
| 858 | /* data until next frame */ |
| 859 | chunk = frame_offset[i + 1] - frame_offset[i]; |
| 860 | } |
Holger Hans Peter Freyther | e231026 | 2013-11-13 16:56:15 +0100 | [diff] [blame] | 861 | if (!m_llc.fits_in_current_frame(chunk)) { |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 862 | LOGP(DRLCMACUL, LOGL_NOTICE, "%s LLC frame exceeds " |
Holger Hans Peter Freyther | e231026 | 2013-11-13 16:56:15 +0100 | [diff] [blame] | 863 | "maximum size %u.\n", tbf_name(this), |
| 864 | m_llc.remaining_space()); |
| 865 | chunk = m_llc.remaining_space(); |
Holger Hans Peter Freyther | d11290b | 2013-10-26 17:32:04 +0200 | [diff] [blame] | 866 | } |
Holger Hans Peter Freyther | e231026 | 2013-11-13 16:56:15 +0100 | [diff] [blame] | 867 | m_llc.append_frame(data + frame_offset[i], chunk); |
| 868 | m_llc.consume(chunk); |
Holger Hans Peter Freyther | d11290b | 2013-10-26 17:32:04 +0200 | [diff] [blame] | 869 | /* not last frame. */ |
| 870 | if (i != frames - 1) { |
| 871 | /* send frame to SGSN */ |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 872 | 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] | 873 | tbf_name(this) , m_llc.frame_length()); |
Holger Hans Peter Freyther | 9948514 | 2013-11-06 20:08:42 +0100 | [diff] [blame] | 874 | snd_ul_ud(); |
Holger Hans Peter Freyther | e231026 | 2013-11-13 16:56:15 +0100 | [diff] [blame] | 875 | m_llc.reset(); |
Holger Hans Peter Freyther | d11290b | 2013-10-26 17:32:04 +0200 | [diff] [blame] | 876 | /* also check if CV==0, because the frame may fill up the |
| 877 | * block precisely, then it is also complete. normally the |
| 878 | * frame would be extended into the next block with a 0-length |
| 879 | * delimiter added to this block. */ |
| 880 | } else if (rh->cv == 0) { |
| 881 | /* send frame to SGSN */ |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 882 | LOGP(DRLCMACUL, LOGL_INFO, "%s complete UL frame " |
| 883 | "that fits precisely in last block: " |
Holger Hans Peter Freyther | e231026 | 2013-11-13 16:56:15 +0100 | [diff] [blame] | 884 | "len=%d\n", tbf_name(this), m_llc.frame_length()); |
Holger Hans Peter Freyther | 9948514 | 2013-11-06 20:08:42 +0100 | [diff] [blame] | 885 | snd_ul_ud(); |
Holger Hans Peter Freyther | e231026 | 2013-11-13 16:56:15 +0100 | [diff] [blame] | 886 | m_llc.reset(); |
Holger Hans Peter Freyther | d11290b | 2013-10-26 17:32:04 +0200 | [diff] [blame] | 887 | } |
| 888 | } |
| 889 | |
| 890 | return 0; |
| 891 | } |
| 892 | |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 893 | /* |
| 894 | * Create DL data block |
| 895 | * The messages are fragmented and forwarded as data blocks. |
| 896 | */ |
Daniel Willmann | b8f2601 | 2014-07-30 19:12:28 +0200 | [diff] [blame] | 897 | struct msgb *gprs_rlcmac_dl_tbf::create_dl_acked_block(uint32_t fn, uint8_t ts) |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 898 | { |
Holger Hans Peter Freyther | 34f6e5e | 2013-10-27 20:31:47 +0100 | [diff] [blame] | 899 | LOGP(DRLCMACDL, LOGL_DEBUG, "%s downlink (V(A)==%d .. " |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 900 | "V(S)==%d)\n", tbf_name(this), |
Daniel Willmann | 7e994e3 | 2014-08-07 15:49:21 +0200 | [diff] [blame] | 901 | m_window.v_a(), m_window.v_s()); |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 902 | |
| 903 | do_resend: |
| 904 | /* check if there is a block with negative acknowledgement */ |
Daniel Willmann | 7e994e3 | 2014-08-07 15:49:21 +0200 | [diff] [blame] | 905 | int resend_bsn = m_window.resend_needed(); |
Holger Hans Peter Freyther | 1577779 | 2013-11-24 00:18:47 +0100 | [diff] [blame] | 906 | if (resend_bsn >= 0) { |
| 907 | LOGP(DRLCMACDL, LOGL_DEBUG, "- Resending BSN %d\n", resend_bsn); |
Holger Hans Peter Freyther | 1577779 | 2013-11-24 00:18:47 +0100 | [diff] [blame] | 908 | /* re-send block with negative aknowlegement */ |
Daniel Willmann | 7e994e3 | 2014-08-07 15:49:21 +0200 | [diff] [blame] | 909 | m_window.m_v_b.mark_unacked(resend_bsn); |
Holger Hans Peter Freyther | 1577779 | 2013-11-24 00:18:47 +0100 | [diff] [blame] | 910 | bts->rlc_resent(); |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 911 | return create_dl_acked_block(fn, ts, resend_bsn, false); |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 912 | } |
| 913 | |
| 914 | /* if the window has stalled, or transfer is complete, |
| 915 | * send an unacknowledged block */ |
Holger Hans Peter Freyther | c03e382 | 2013-11-24 00:21:32 +0100 | [diff] [blame] | 916 | if (state_is(GPRS_RLCMAC_FINISHED) || dl_window_stalled()) { |
Holger Hans Peter Freyther | ef93bdb | 2013-11-24 00:01:50 +0100 | [diff] [blame] | 917 | if (state_is(GPRS_RLCMAC_FINISHED)) { |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 918 | LOGP(DRLCMACDL, LOGL_DEBUG, "- Restarting at BSN %d, " |
| 919 | "because all blocks have been transmitted.\n", |
Daniel Willmann | 7e994e3 | 2014-08-07 15:49:21 +0200 | [diff] [blame] | 920 | m_window.v_a()); |
Holger Hans Peter Freyther | ef93bdb | 2013-11-24 00:01:50 +0100 | [diff] [blame] | 921 | bts->rlc_restarted(); |
| 922 | } else { |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 923 | LOGP(DRLCMACDL, LOGL_NOTICE, "- Restarting at BSN %d, " |
| 924 | "because all window is stalled.\n", |
Daniel Willmann | 7e994e3 | 2014-08-07 15:49:21 +0200 | [diff] [blame] | 925 | m_window.v_a()); |
Holger Hans Peter Freyther | c70aae4 | 2013-11-19 17:09:37 +0100 | [diff] [blame] | 926 | bts->rlc_stalled(); |
| 927 | } |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 928 | /* If V(S) == V(A) and finished state, we would have received |
| 929 | * acknowledgement of all transmitted block. In this case we |
| 930 | * would have transmitted the final block, and received ack |
| 931 | * from MS. But in this case we did not receive the final ack |
| 932 | * indication from MS. This should never happen if MS works |
| 933 | * correctly. */ |
Daniel Willmann | 7e994e3 | 2014-08-07 15:49:21 +0200 | [diff] [blame] | 934 | if (m_window.window_empty()) { |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 935 | LOGP(DRLCMACDL, LOGL_DEBUG, "- MS acked all blocks, " |
| 936 | "so we re-transmit final block!\n"); |
| 937 | /* we just send final block again */ |
Daniel Willmann | 7e994e3 | 2014-08-07 15:49:21 +0200 | [diff] [blame] | 938 | int16_t index = m_window.v_s_mod(-1); |
Holger Hans Peter Freyther | e9429b5 | 2013-11-13 19:36:57 +0100 | [diff] [blame] | 939 | bts->rlc_resent(); |
Holger Hans Peter Freyther | a6ba67c | 2013-11-24 00:44:21 +0100 | [diff] [blame] | 940 | return create_dl_acked_block(fn, ts, index, false); |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 941 | } |
| 942 | |
| 943 | /* cycle through all unacked blocks */ |
Daniel Willmann | 7e994e3 | 2014-08-07 15:49:21 +0200 | [diff] [blame] | 944 | int resend = m_window.mark_for_resend(); |
Holger Hans Peter Freyther | 8b16ae3 | 2013-11-24 00:38:54 +0100 | [diff] [blame] | 945 | |
| 946 | /* 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] | 947 | * to be resent. If not, this is an software error. */ |
| 948 | if (resend == 0) { |
| 949 | LOGP(DRLCMACDL, LOGL_ERROR, "Software error: " |
| 950 | "There are no unacknowledged blocks, but V(A) " |
| 951 | " != V(S). PLEASE FIX!\n"); |
| 952 | /* we just send final block again */ |
Daniel Willmann | 7e994e3 | 2014-08-07 15:49:21 +0200 | [diff] [blame] | 953 | int16_t index = m_window.v_s_mod(-1); |
Holger Hans Peter Freyther | a6ba67c | 2013-11-24 00:44:21 +0100 | [diff] [blame] | 954 | return create_dl_acked_block(fn, ts, index, false); |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 955 | } |
| 956 | goto do_resend; |
| 957 | } |
| 958 | |
Holger Hans Peter Freyther | a6ba67c | 2013-11-24 00:44:21 +0100 | [diff] [blame] | 959 | return create_new_bsn(fn, ts); |
| 960 | } |
| 961 | |
Daniel Willmann | b8f2601 | 2014-07-30 19:12:28 +0200 | [diff] [blame] | 962 | struct msgb *gprs_rlcmac_dl_tbf::create_new_bsn(const uint32_t fn, const uint8_t ts) |
Holger Hans Peter Freyther | a6ba67c | 2013-11-24 00:44:21 +0100 | [diff] [blame] | 963 | { |
| 964 | struct rlc_dl_header *rh; |
| 965 | struct rlc_li_field *li; |
| 966 | struct msgb *msg; |
Holger Hans Peter Freyther | a6ba67c | 2013-11-24 00:44:21 +0100 | [diff] [blame] | 967 | uint8_t *delimiter, *data, *e_pointer; |
| 968 | uint16_t space, chunk; |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 969 | gprs_rlc_data *rlc_data; |
Holger Hans Peter Freyther | a6ba67c | 2013-11-24 00:44:21 +0100 | [diff] [blame] | 970 | bool first_fin_ack = false; |
Daniel Willmann | 7e994e3 | 2014-08-07 15:49:21 +0200 | [diff] [blame] | 971 | const uint16_t bsn = m_window.v_s(); |
Holger Hans Peter Freyther | a6ba67c | 2013-11-24 00:44:21 +0100 | [diff] [blame] | 972 | |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 973 | LOGP(DRLCMACDL, LOGL_DEBUG, "- Sending new block at BSN %d\n", |
Daniel Willmann | 7e994e3 | 2014-08-07 15:49:21 +0200 | [diff] [blame] | 974 | m_window.v_s()); |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 975 | |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 976 | #warning "Selection of the CS doesn't belong here" |
| 977 | if (cs == 0) { |
| 978 | cs = bts_data()->initial_cs_dl; |
| 979 | if (cs < 1 || cs > 4) |
| 980 | cs = 1; |
| 981 | } |
Holger Hans Peter Freyther | 58db60c | 2013-11-13 20:45:40 +0100 | [diff] [blame] | 982 | /* total length of block, including spare bits */ |
| 983 | const uint8_t block_length = gprs_rlcmac_cs[cs].block_length; |
| 984 | /* length of usable data of block, w/o spare bits, inc. MAC */ |
| 985 | const uint8_t block_data_len = gprs_rlcmac_cs[cs].block_data; |
| 986 | |
| 987 | /* 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] | 988 | rlc_data = m_rlc.block(bsn); |
| 989 | data = rlc_data->prepare(block_data_len); |
Holger Hans Peter Freyther | 58db60c | 2013-11-13 20:45:40 +0100 | [diff] [blame] | 990 | |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 991 | rh = (struct rlc_dl_header *)data; |
| 992 | rh->pt = 0; /* Data Block */ |
| 993 | rh->rrbp = rh->s_p = 0; /* Polling, set later, if required */ |
| 994 | rh->usf = 7; /* will be set at scheduler */ |
| 995 | rh->pr = 0; /* FIXME: power reduction */ |
Holger Hans Peter Freyther | 34f6e5e | 2013-10-27 20:31:47 +0100 | [diff] [blame] | 996 | rh->tfi = m_tfi; /* TFI */ |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 997 | rh->fbi = 0; /* Final Block Indicator, set late, if true */ |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 998 | rh->bsn = bsn; /* Block Sequence Number */ |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 999 | rh->e = 0; /* Extension bit, maybe set later */ |
| 1000 | e_pointer = data + 2; /* points to E of current chunk */ |
Holger Hans Peter Freyther | 58db60c | 2013-11-13 20:45:40 +0100 | [diff] [blame] | 1001 | data += sizeof(*rh); |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 1002 | delimiter = data; /* where next length header would be stored */ |
Holger Hans Peter Freyther | 58db60c | 2013-11-13 20:45:40 +0100 | [diff] [blame] | 1003 | space = block_data_len - sizeof(*rh); |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 1004 | while (1) { |
Holger Hans Peter Freyther | acb5427 | 2013-11-07 08:15:58 +0100 | [diff] [blame] | 1005 | chunk = m_llc.chunk_size(); |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 1006 | /* if chunk will exceed block limit */ |
| 1007 | if (chunk > space) { |
| 1008 | LOGP(DRLCMACDL, LOGL_DEBUG, "-- Chunk with length %d " |
| 1009 | "larger than space (%d) left in block: copy " |
| 1010 | "only remaining space, and we are done\n", |
| 1011 | chunk, space); |
| 1012 | /* block is filled, so there is no extension */ |
| 1013 | *e_pointer |= 0x01; |
| 1014 | /* fill only space */ |
Holger Hans Peter Freyther | acb5427 | 2013-11-07 08:15:58 +0100 | [diff] [blame] | 1015 | m_llc.consume(data, space); |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 1016 | /* return data block as message */ |
| 1017 | break; |
| 1018 | } |
| 1019 | /* if FINAL chunk would fit precisely in space left */ |
Holger Hans Peter Freyther | 28e5378 | 2013-11-06 20:23:56 +0100 | [diff] [blame] | 1020 | if (chunk == space && llist_empty(&m_llc.queue)) { |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 1021 | LOGP(DRLCMACDL, LOGL_DEBUG, "-- Chunk with length %d " |
| 1022 | "would exactly fit into space (%d): because " |
| 1023 | "this is a final block, we don't add length " |
| 1024 | "header, and we are done\n", chunk, space); |
| 1025 | LOGP(DRLCMACDL, LOGL_INFO, "Complete DL frame for " |
Holger Hans Peter Freyther | 34f6e5e | 2013-10-27 20:31:47 +0100 | [diff] [blame] | 1026 | "%s that fits precisely in last block: " |
Holger Hans Peter Freyther | e231026 | 2013-11-13 16:56:15 +0100 | [diff] [blame] | 1027 | "len=%d\n", tbf_name(this), m_llc.frame_length()); |
| 1028 | gprs_rlcmac_dl_bw(this, m_llc.frame_length()); |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 1029 | /* block is filled, so there is no extension */ |
| 1030 | *e_pointer |= 0x01; |
| 1031 | /* fill space */ |
Holger Hans Peter Freyther | acb5427 | 2013-11-07 08:15:58 +0100 | [diff] [blame] | 1032 | m_llc.consume(data, space); |
Holger Hans Peter Freyther | 758dc12 | 2013-11-06 20:39:45 +0100 | [diff] [blame] | 1033 | m_llc.reset(); |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 1034 | /* final block */ |
| 1035 | rh->fbi = 1; /* we indicate final block */ |
| 1036 | tbf_new_state(this, GPRS_RLCMAC_FINISHED); |
| 1037 | /* return data block as message */ |
| 1038 | break; |
| 1039 | } |
| 1040 | /* if chunk would fit exactly in space left */ |
| 1041 | if (chunk == space) { |
| 1042 | LOGP(DRLCMACDL, LOGL_DEBUG, "-- Chunk with length %d " |
| 1043 | "would exactly fit into space (%d): add length " |
| 1044 | "header with LI=0, to make frame extend to " |
| 1045 | "next block, and we are done\n", chunk, space); |
| 1046 | /* make space for delimiter */ |
| 1047 | if (delimiter != data) |
Daniel Willmann | c3d5325 | 2013-11-13 20:27:21 +0100 | [diff] [blame] | 1048 | memmove(delimiter + 1, delimiter, |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 1049 | data - delimiter); |
| 1050 | data++; |
| 1051 | space--; |
| 1052 | /* add LI with 0 length */ |
| 1053 | li = (struct rlc_li_field *)delimiter; |
| 1054 | li->e = 1; /* not more extension */ |
| 1055 | li->m = 0; /* shall be set to 0, in case of li = 0 */ |
| 1056 | li->li = 0; /* chunk fills the complete space */ |
| 1057 | // no need to set e_pointer nor increase delimiter |
| 1058 | /* fill only space, which is 1 octet less than chunk */ |
Holger Hans Peter Freyther | acb5427 | 2013-11-07 08:15:58 +0100 | [diff] [blame] | 1059 | m_llc.consume(data, space); |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 1060 | /* return data block as message */ |
| 1061 | break; |
| 1062 | } |
| 1063 | LOGP(DRLCMACDL, LOGL_DEBUG, "-- Chunk with length %d is less " |
| 1064 | "than remaining space (%d): add length header to " |
| 1065 | "to delimit LLC frame\n", chunk, space); |
| 1066 | /* the LLC frame chunk ends in this block */ |
| 1067 | /* make space for delimiter */ |
| 1068 | if (delimiter != data) |
Daniel Willmann | c3d5325 | 2013-11-13 20:27:21 +0100 | [diff] [blame] | 1069 | memmove(delimiter + 1, delimiter, data - delimiter); |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 1070 | data++; |
| 1071 | space--; |
| 1072 | /* add LI to delimit frame */ |
| 1073 | li = (struct rlc_li_field *)delimiter; |
| 1074 | li->e = 0; /* Extension bit, maybe set later */ |
| 1075 | li->m = 0; /* will be set later, if there is more LLC data */ |
| 1076 | li->li = chunk; /* length of chunk */ |
| 1077 | e_pointer = delimiter; /* points to E of current delimiter */ |
| 1078 | delimiter++; |
Holger Hans Peter Freyther | acb5427 | 2013-11-07 08:15:58 +0100 | [diff] [blame] | 1079 | /* copy (rest of) LLC frame to space and reset later */ |
| 1080 | m_llc.consume(data, chunk); |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 1081 | data += chunk; |
| 1082 | space -= chunk; |
Holger Hans Peter Freyther | 34f6e5e | 2013-10-27 20:31:47 +0100 | [diff] [blame] | 1083 | LOGP(DRLCMACDL, LOGL_INFO, "Complete DL frame for %s" |
Holger Hans Peter Freyther | e231026 | 2013-11-13 16:56:15 +0100 | [diff] [blame] | 1084 | "len=%d\n", tbf_name(this), m_llc.frame_length()); |
| 1085 | gprs_rlcmac_dl_bw(this, m_llc.frame_length()); |
Holger Hans Peter Freyther | 758dc12 | 2013-11-06 20:39:45 +0100 | [diff] [blame] | 1086 | m_llc.reset(); |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 1087 | /* dequeue next LLC frame, if any */ |
| 1088 | msg = llc_dequeue(gprs_bssgp_pcu_current_bctx()); |
| 1089 | if (msg) { |
| 1090 | LOGP(DRLCMACDL, LOGL_INFO, "- Dequeue next LLC for " |
Holger Hans Peter Freyther | 34f6e5e | 2013-10-27 20:31:47 +0100 | [diff] [blame] | 1091 | "%s (len=%d)\n", tbf_name(this), msg->len); |
Holger Hans Peter Freyther | 857281f | 2013-11-13 14:56:55 +0100 | [diff] [blame] | 1092 | m_llc.put_frame(msg->data, msg->len); |
Holger Hans Peter Freyther | b3d5ee2 | 2013-11-13 16:43:26 +0100 | [diff] [blame] | 1093 | bts->llc_frame_sched(); |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 1094 | msgb_free(msg); |
| 1095 | } |
| 1096 | /* if we have more data and we have space left */ |
Holger Hans Peter Freyther | e231026 | 2013-11-13 16:56:15 +0100 | [diff] [blame] | 1097 | if (space > 0 && m_llc.frame_length()) { |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 1098 | li->m = 1; /* we indicate more frames to follow */ |
| 1099 | continue; |
| 1100 | } |
| 1101 | /* if we don't have more LLC frames */ |
Holger Hans Peter Freyther | e231026 | 2013-11-13 16:56:15 +0100 | [diff] [blame] | 1102 | if (!m_llc.frame_length()) { |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 1103 | LOGP(DRLCMACDL, LOGL_DEBUG, "-- Final block, so we " |
| 1104 | "done.\n"); |
| 1105 | li->e = 1; /* we cannot extend */ |
| 1106 | rh->fbi = 1; /* we indicate final block */ |
Holger Hans Peter Freyther | b784046 | 2013-11-07 07:50:26 +0100 | [diff] [blame] | 1107 | first_fin_ack = true; |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 1108 | /* + 1 indicates: first final ack */ |
| 1109 | tbf_new_state(this, GPRS_RLCMAC_FINISHED); |
| 1110 | break; |
| 1111 | } |
| 1112 | /* we have no space left */ |
| 1113 | LOGP(DRLCMACDL, LOGL_DEBUG, "-- No space left, so we are " |
| 1114 | "done.\n"); |
| 1115 | li->e = 1; /* we cannot extend */ |
| 1116 | break; |
| 1117 | } |
| 1118 | LOGP(DRLCMACDL, LOGL_DEBUG, "data block: %s\n", |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 1119 | osmo_hexdump(rlc_data->block, block_length)); |
Holger Hans Peter Freyther | 58db60c | 2013-11-13 20:45:40 +0100 | [diff] [blame] | 1120 | #warning "move this up?" |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 1121 | rlc_data->len = block_length; |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 1122 | /* raise send state and set ack state array */ |
Daniel Willmann | 7e994e3 | 2014-08-07 15:49:21 +0200 | [diff] [blame] | 1123 | m_window.m_v_b.mark_unacked(bsn); |
| 1124 | m_window.increment_send(); |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 1125 | |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 1126 | 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] | 1127 | } |
| 1128 | |
Daniel Willmann | b8f2601 | 2014-07-30 19:12:28 +0200 | [diff] [blame] | 1129 | struct msgb *gprs_rlcmac_dl_tbf::create_dl_acked_block( |
Holger Hans Peter Freyther | b784046 | 2013-11-07 07:50:26 +0100 | [diff] [blame] | 1130 | const uint32_t fn, const uint8_t ts, |
| 1131 | const int index, const bool first_fin_ack) |
| 1132 | { |
| 1133 | uint8_t *data; |
| 1134 | struct rlc_dl_header *rh; |
| 1135 | struct msgb *dl_msg; |
| 1136 | uint8_t len; |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 1137 | |
| 1138 | /* get data and header from current block */ |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 1139 | data = m_rlc.block(index)->block; |
| 1140 | len = m_rlc.block(index)->len; |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 1141 | rh = (struct rlc_dl_header *)data; |
| 1142 | |
| 1143 | /* Clear Polling, if still set in history buffer */ |
| 1144 | rh->s_p = 0; |
| 1145 | |
| 1146 | /* poll after POLL_ACK_AFTER_FRAMES frames, or when final block is tx. |
| 1147 | */ |
Daniel Willmann | 7e994e3 | 2014-08-07 15:49:21 +0200 | [diff] [blame] | 1148 | if (m_tx_counter >= POLL_ACK_AFTER_FRAMES || first_fin_ack) { |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 1149 | if (first_fin_ack) { |
| 1150 | LOGP(DRLCMACDL, LOGL_DEBUG, "- Scheduling Ack/Nack " |
| 1151 | "polling, because first final block sent.\n"); |
| 1152 | } else { |
| 1153 | LOGP(DRLCMACDL, LOGL_DEBUG, "- Scheduling Ack/Nack " |
| 1154 | "polling, because %d blocks sent.\n", |
| 1155 | POLL_ACK_AFTER_FRAMES); |
| 1156 | } |
| 1157 | /* scheduling not possible, because: */ |
| 1158 | if (poll_state != GPRS_RLCMAC_POLL_NONE) |
Holger Hans Peter Freyther | e5109ba | 2014-01-16 10:11:22 +0100 | [diff] [blame] | 1159 | LOGP(DRLCMACDL, LOGL_DEBUG, "Polling is already " |
Holger Hans Peter Freyther | 34f6e5e | 2013-10-27 20:31:47 +0100 | [diff] [blame] | 1160 | "sheduled for %s, so we must wait for " |
| 1161 | "requesting downlink ack\n", tbf_name(this)); |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 1162 | else if (control_ts != ts) |
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 in this TS %d, waiting for " |
| 1165 | "TS %d\n", ts, control_ts); |
Holger Hans Peter Freyther | 58db60c | 2013-11-13 20:45:40 +0100 | [diff] [blame] | 1166 | #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] | 1167 | 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] | 1168 | LOGP(DRLCMACDL, LOGL_DEBUG, "Polling cannot be " |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 1169 | "sheduled, because single block alllocation " |
| 1170 | "already exists\n"); |
| 1171 | else { |
Holger Hans Peter Freyther | e5109ba | 2014-01-16 10:11:22 +0100 | [diff] [blame] | 1172 | LOGP(DRLCMACDL, LOGL_DEBUG, "Polling sheduled in this " |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 1173 | "TS %d\n", ts); |
Daniel Willmann | 7e994e3 | 2014-08-07 15:49:21 +0200 | [diff] [blame] | 1174 | m_tx_counter = 0; |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 1175 | /* start timer whenever we send the final block */ |
| 1176 | if (rh->fbi == 1) |
| 1177 | tbf_timer_start(this, 3191, bts_data()->t3191, 0); |
| 1178 | |
| 1179 | /* schedule polling */ |
| 1180 | poll_state = GPRS_RLCMAC_POLL_SCHED; |
| 1181 | poll_fn = (fn + 13) % 2715648; |
| 1182 | |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 1183 | /* set polling in header */ |
| 1184 | rh->rrbp = 0; /* N+13 */ |
| 1185 | rh->s_p = 1; /* Polling */ |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 1186 | } |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 1187 | } |
| 1188 | |
| 1189 | /* return data block as message */ |
| 1190 | dl_msg = msgb_alloc(len, "rlcmac_dl_data"); |
| 1191 | if (!dl_msg) |
| 1192 | return NULL; |
Holger Hans Peter Freyther | 64b49bc | 2013-11-23 23:16:07 +0100 | [diff] [blame] | 1193 | |
| 1194 | /* Increment TX-counter */ |
Daniel Willmann | 7e994e3 | 2014-08-07 15:49:21 +0200 | [diff] [blame] | 1195 | m_tx_counter++; |
Holger Hans Peter Freyther | 64b49bc | 2013-11-23 23:16:07 +0100 | [diff] [blame] | 1196 | |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 1197 | memcpy(msgb_put(dl_msg, len), data, len); |
Holger Hans Peter Freyther | e9429b5 | 2013-11-13 19:36:57 +0100 | [diff] [blame] | 1198 | bts->rlc_sent(); |
Holger Hans Peter Freyther | 61a0a04 | 2013-10-26 21:48:38 +0200 | [diff] [blame] | 1199 | |
| 1200 | return dl_msg; |
| 1201 | } |
| 1202 | |
Holger Hans Peter Freyther | 2db7e7e | 2013-10-26 20:45:35 +0200 | [diff] [blame] | 1203 | struct msgb *gprs_rlcmac_tbf::create_dl_ass(uint32_t fn) |
| 1204 | { |
| 1205 | struct msgb *msg; |
Daniel Willmann | b2886f1 | 2014-08-07 14:48:20 +0200 | [diff] [blame] | 1206 | struct gprs_rlcmac_dl_tbf *new_dl_tbf; |
Holger Hans Peter Freyther | 9977e15 | 2013-11-24 22:52:10 +0100 | [diff] [blame] | 1207 | int poll_ass_dl = 1; |
Holger Hans Peter Freyther | 2db7e7e | 2013-10-26 20:45:35 +0200 | [diff] [blame] | 1208 | |
Holger Hans Peter Freyther | 9977e15 | 2013-11-24 22:52:10 +0100 | [diff] [blame] | 1209 | 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] | 1210 | LOGP(DRLCMAC, LOGL_NOTICE, "Cannot poll for downlink " |
| 1211 | "assigment, because MS cannot reply. (control TS=%d, " |
| 1212 | "first common TS=%d)\n", control_ts, |
| 1213 | first_common_ts); |
| 1214 | poll_ass_dl = 0; |
| 1215 | } |
| 1216 | if (poll_ass_dl) { |
| 1217 | if (poll_state != GPRS_RLCMAC_POLL_NONE) { |
| 1218 | LOGP(DRLCMAC, LOGL_DEBUG, "Polling is already sheduled " |
Holger Hans Peter Freyther | 34f6e5e | 2013-10-27 20:31:47 +0100 | [diff] [blame] | 1219 | "for %s, so we must wait for downlink " |
| 1220 | "assignment...\n", tbf_name(this)); |
Holger Hans Peter Freyther | 2db7e7e | 2013-10-26 20:45:35 +0200 | [diff] [blame] | 1221 | return NULL; |
| 1222 | } |
Holger Hans Peter Freyther | ec80f82 | 2013-10-27 13:44:37 +0100 | [diff] [blame] | 1223 | 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] | 1224 | LOGP(DRLCMACUL, LOGL_DEBUG, "Polling is already " |
| 1225 | "scheduled for single block allocation...\n"); |
| 1226 | return NULL; |
| 1227 | } |
| 1228 | } |
| 1229 | |
| 1230 | /* on uplink TBF we get the downlink TBF to be assigned. */ |
| 1231 | if (direction == GPRS_RLCMAC_UL_TBF) { |
Daniel Willmann | b2886f1 | 2014-08-07 14:48:20 +0200 | [diff] [blame] | 1232 | gprs_rlcmac_ul_tbf *ul_tbf = static_cast<gprs_rlcmac_ul_tbf *>(this); |
| 1233 | |
Holger Hans Peter Freyther | 2db7e7e | 2013-10-26 20:45:35 +0200 | [diff] [blame] | 1234 | /* be sure to check first, if contention resolution is done, |
| 1235 | * otherwise we cannot send the assignment yet */ |
Daniel Willmann | 7e994e3 | 2014-08-07 15:49:21 +0200 | [diff] [blame] | 1236 | if (!ul_tbf->m_contention_resolution_done) { |
Holger Hans Peter Freyther | 2db7e7e | 2013-10-26 20:45:35 +0200 | [diff] [blame] | 1237 | LOGP(DRLCMAC, LOGL_DEBUG, "Cannot assign DL TBF now, " |
| 1238 | "because contention resolution is not " |
| 1239 | "finished.\n"); |
| 1240 | return NULL; |
| 1241 | } |
| 1242 | #warning "THIS should probably go over the IMSI too" |
Daniel Willmann | b2886f1 | 2014-08-07 14:48:20 +0200 | [diff] [blame] | 1243 | new_dl_tbf = ul_tbf->bts->dl_tbf_by_tlli(m_tlli); |
Holger Hans Peter Freyther | 2db7e7e | 2013-10-26 20:45:35 +0200 | [diff] [blame] | 1244 | } else |
Daniel Willmann | b2886f1 | 2014-08-07 14:48:20 +0200 | [diff] [blame] | 1245 | new_dl_tbf = static_cast<gprs_rlcmac_dl_tbf *>(this); |
| 1246 | if (!new_dl_tbf) { |
Holger Hans Peter Freyther | 2db7e7e | 2013-10-26 20:45:35 +0200 | [diff] [blame] | 1247 | LOGP(DRLCMACDL, LOGL_ERROR, "We have a schedule for downlink " |
Holger Hans Peter Freyther | 34f6e5e | 2013-10-27 20:31:47 +0100 | [diff] [blame] | 1248 | "assignment at uplink %s, but there is no downlink " |
| 1249 | "TBF\n", tbf_name(this)); |
Holger Hans Peter Freyther | 2db7e7e | 2013-10-26 20:45:35 +0200 | [diff] [blame] | 1250 | dl_ass_state = GPRS_RLCMAC_DL_ASS_NONE; |
| 1251 | return NULL; |
| 1252 | } |
| 1253 | |
| 1254 | msg = msgb_alloc(23, "rlcmac_dl_ass"); |
| 1255 | if (!msg) |
| 1256 | return NULL; |
| 1257 | bitvec *ass_vec = bitvec_alloc(23); |
| 1258 | if (!ass_vec) { |
| 1259 | msgb_free(msg); |
| 1260 | return NULL; |
| 1261 | } |
| 1262 | bitvec_unhex(ass_vec, |
| 1263 | "2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b"); |
Daniel Willmann | b2886f1 | 2014-08-07 14:48:20 +0200 | [diff] [blame] | 1264 | LOGP(DRLCMAC, LOGL_INFO, "%s start Packet Downlink Assignment (PACCH)\n", tbf_name(new_dl_tbf)); |
Holger Hans Peter Freyther | 2db7e7e | 2013-10-26 20:45:35 +0200 | [diff] [blame] | 1265 | 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] | 1266 | Encoding::write_packet_downlink_assignment(mac_control_block, m_tfi, |
Daniel Willmann | b2886f1 | 2014-08-07 14:48:20 +0200 | [diff] [blame] | 1267 | (direction == GPRS_RLCMAC_DL_TBF), new_dl_tbf, |
Holger Hans Peter Freyther | 2db7e7e | 2013-10-26 20:45:35 +0200 | [diff] [blame] | 1268 | poll_ass_dl, bts_data()->alpha, bts_data()->gamma, -1, 0); |
| 1269 | LOGP(DRLCMAC, LOGL_DEBUG, "+++++++++++++++++++++++++ TX : Packet Downlink Assignment +++++++++++++++++++++++++\n"); |
| 1270 | encode_gsm_rlcmac_downlink(ass_vec, mac_control_block); |
| 1271 | LOGPC(DCSN1, LOGL_NOTICE, "\n"); |
| 1272 | LOGP(DRLCMAC, LOGL_DEBUG, "------------------------- TX : Packet Downlink Assignment -------------------------\n"); |
| 1273 | bitvec_pack(ass_vec, msgb_put(msg, 23)); |
| 1274 | bitvec_free(ass_vec); |
| 1275 | talloc_free(mac_control_block); |
| 1276 | |
| 1277 | if (poll_ass_dl) { |
| 1278 | poll_state = GPRS_RLCMAC_POLL_SCHED; |
| 1279 | poll_fn = (fn + 13) % 2715648; |
| 1280 | dl_ass_state = GPRS_RLCMAC_DL_ASS_WAIT_ACK; |
| 1281 | } else { |
| 1282 | dl_ass_state = GPRS_RLCMAC_DL_ASS_NONE; |
Daniel Willmann | b2886f1 | 2014-08-07 14:48:20 +0200 | [diff] [blame] | 1283 | tbf_new_state(new_dl_tbf, GPRS_RLCMAC_FLOW); |
| 1284 | tbf_assign_control_ts(new_dl_tbf); |
Holger Hans Peter Freyther | 2db7e7e | 2013-10-26 20:45:35 +0200 | [diff] [blame] | 1285 | /* stop pending assignment timer */ |
Daniel Willmann | b2886f1 | 2014-08-07 14:48:20 +0200 | [diff] [blame] | 1286 | new_dl_tbf->stop_timer(); |
Holger Hans Peter Freyther | 2db7e7e | 2013-10-26 20:45:35 +0200 | [diff] [blame] | 1287 | |
| 1288 | } |
Holger Hans Peter Freyther | 2db7e7e | 2013-10-26 20:45:35 +0200 | [diff] [blame] | 1289 | |
| 1290 | return msg; |
| 1291 | } |
| 1292 | |
Holger Hans Peter Freyther | ae03f22 | 2013-10-26 21:20:51 +0200 | [diff] [blame] | 1293 | struct msgb *gprs_rlcmac_tbf::create_ul_ass(uint32_t fn) |
| 1294 | { |
| 1295 | struct msgb *msg; |
Daniel Willmann | 350f64d | 2014-08-07 14:54:11 +0200 | [diff] [blame] | 1296 | struct gprs_rlcmac_ul_tbf *new_tbf; |
Holger Hans Peter Freyther | ae03f22 | 2013-10-26 21:20:51 +0200 | [diff] [blame] | 1297 | |
Holger Hans Peter Freyther | ae03f22 | 2013-10-26 21:20:51 +0200 | [diff] [blame] | 1298 | if (poll_state != GPRS_RLCMAC_POLL_NONE) { |
| 1299 | LOGP(DRLCMACUL, LOGL_DEBUG, "Polling is already " |
Holger Hans Peter Freyther | 34f6e5e | 2013-10-27 20:31:47 +0100 | [diff] [blame] | 1300 | "sheduled for %s, so we must wait for uplink " |
| 1301 | "assignment...\n", tbf_name(this)); |
Holger Hans Peter Freyther | ae03f22 | 2013-10-26 21:20:51 +0200 | [diff] [blame] | 1302 | return NULL; |
| 1303 | } |
Holger Hans Peter Freyther | ec80f82 | 2013-10-27 13:44:37 +0100 | [diff] [blame] | 1304 | 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] | 1305 | LOGP(DRLCMACUL, LOGL_DEBUG, "Polling is already scheduled for " |
| 1306 | "single block allocation...\n"); |
| 1307 | return NULL; |
| 1308 | } |
Holger Hans Peter Freyther | ae03f22 | 2013-10-26 21:20:51 +0200 | [diff] [blame] | 1309 | |
| 1310 | /* on down TBF we get the uplink TBF to be assigned. */ |
| 1311 | #warning "Probably want to find by IMSI too" |
| 1312 | if (direction == GPRS_RLCMAC_DL_TBF) |
Daniel Willmann | b59d61b | 2014-07-02 17:58:14 +0200 | [diff] [blame] | 1313 | new_tbf = bts->ul_tbf_by_tlli(m_tlli); |
Holger Hans Peter Freyther | ae03f22 | 2013-10-26 21:20:51 +0200 | [diff] [blame] | 1314 | else |
Daniel Willmann | 350f64d | 2014-08-07 14:54:11 +0200 | [diff] [blame] | 1315 | new_tbf = static_cast<gprs_rlcmac_ul_tbf *>(this); |
Holger Hans Peter Freyther | ae03f22 | 2013-10-26 21:20:51 +0200 | [diff] [blame] | 1316 | |
| 1317 | if (!new_tbf) { |
| 1318 | LOGP(DRLCMACUL, LOGL_ERROR, "We have a schedule for uplink " |
Holger Hans Peter Freyther | 34f6e5e | 2013-10-27 20:31:47 +0100 | [diff] [blame] | 1319 | "assignment at downlink %s, but there is no uplink " |
| 1320 | "TBF\n", tbf_name(this)); |
Holger Hans Peter Freyther | ae03f22 | 2013-10-26 21:20:51 +0200 | [diff] [blame] | 1321 | ul_ass_state = GPRS_RLCMAC_UL_ASS_NONE; |
| 1322 | return NULL; |
| 1323 | } |
| 1324 | |
| 1325 | msg = msgb_alloc(23, "rlcmac_ul_ass"); |
| 1326 | if (!msg) |
| 1327 | return NULL; |
Holger Hans Peter Freyther | 474685e | 2013-10-27 17:01:14 +0100 | [diff] [blame] | 1328 | 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] | 1329 | bitvec *ass_vec = bitvec_alloc(23); |
| 1330 | if (!ass_vec) { |
| 1331 | msgb_free(msg); |
| 1332 | return NULL; |
| 1333 | } |
| 1334 | bitvec_unhex(ass_vec, |
| 1335 | "2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b"); |
Holger Hans Peter Freyther | 34f6e5e | 2013-10-27 20:31:47 +0100 | [diff] [blame] | 1336 | 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] | 1337 | (direction == GPRS_RLCMAC_DL_TBF), m_tlli, |
Holger Hans Peter Freyther | 9977e15 | 2013-11-24 22:52:10 +0100 | [diff] [blame] | 1338 | m_tlli_valid, new_tbf, 1, bts_data()->alpha, |
Holger Hans Peter Freyther | ae03f22 | 2013-10-26 21:20:51 +0200 | [diff] [blame] | 1339 | bts_data()->gamma, -1); |
| 1340 | bitvec_pack(ass_vec, msgb_put(msg, 23)); |
| 1341 | RlcMacDownlink_t * mac_control_block = (RlcMacDownlink_t *)talloc_zero(tall_pcu_ctx, RlcMacDownlink_t); |
| 1342 | LOGP(DRLCMAC, LOGL_DEBUG, "+++++++++++++++++++++++++ TX : Packet Uplink Assignment +++++++++++++++++++++++++\n"); |
| 1343 | decode_gsm_rlcmac_downlink(ass_vec, mac_control_block); |
| 1344 | LOGPC(DCSN1, LOGL_NOTICE, "\n"); |
| 1345 | LOGP(DRLCMAC, LOGL_DEBUG, "------------------------- TX : Packet Uplink Assignment -------------------------\n"); |
| 1346 | bitvec_free(ass_vec); |
| 1347 | talloc_free(mac_control_block); |
| 1348 | |
Holger Hans Peter Freyther | ae03f22 | 2013-10-26 21:20:51 +0200 | [diff] [blame] | 1349 | poll_state = GPRS_RLCMAC_POLL_SCHED; |
| 1350 | poll_fn = (fn + 13) % 2715648; |
| 1351 | ul_ass_state = GPRS_RLCMAC_UL_ASS_WAIT_ACK; |
Holger Hans Peter Freyther | ae03f22 | 2013-10-26 21:20:51 +0200 | [diff] [blame] | 1352 | |
| 1353 | return msg; |
| 1354 | } |
| 1355 | |
Daniel Willmann | 350f64d | 2014-08-07 14:54:11 +0200 | [diff] [blame] | 1356 | struct msgb *gprs_rlcmac_ul_tbf::create_ul_ack(uint32_t fn) |
Holger Hans Peter Freyther | 46bcb8d | 2013-10-26 21:04:28 +0200 | [diff] [blame] | 1357 | { |
| 1358 | int final = (state_is(GPRS_RLCMAC_FINISHED)); |
| 1359 | struct msgb *msg; |
| 1360 | |
| 1361 | if (final) { |
| 1362 | if (poll_state != GPRS_RLCMAC_POLL_NONE) { |
| 1363 | LOGP(DRLCMACUL, LOGL_DEBUG, "Polling is already " |
Holger Hans Peter Freyther | 34f6e5e | 2013-10-27 20:31:47 +0100 | [diff] [blame] | 1364 | "sheduled for %s, so we must wait for " |
| 1365 | "final uplink ack...\n", tbf_name(this)); |
Holger Hans Peter Freyther | 46bcb8d | 2013-10-26 21:04:28 +0200 | [diff] [blame] | 1366 | return NULL; |
| 1367 | } |
Holger Hans Peter Freyther | ec80f82 | 2013-10-27 13:44:37 +0100 | [diff] [blame] | 1368 | 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] | 1369 | LOGP(DRLCMACUL, LOGL_DEBUG, "Polling is already " |
| 1370 | "scheduled for single block allocation...\n"); |
| 1371 | return NULL; |
| 1372 | } |
| 1373 | } |
| 1374 | |
| 1375 | msg = msgb_alloc(23, "rlcmac_ul_ack"); |
| 1376 | if (!msg) |
| 1377 | return NULL; |
| 1378 | bitvec *ack_vec = bitvec_alloc(23); |
| 1379 | if (!ack_vec) { |
| 1380 | msgb_free(msg); |
| 1381 | return NULL; |
| 1382 | } |
| 1383 | bitvec_unhex(ack_vec, |
| 1384 | "2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b"); |
| 1385 | RlcMacDownlink_t * mac_control_block = (RlcMacDownlink_t *)talloc_zero(tall_pcu_ctx, RlcMacDownlink_t); |
| 1386 | Encoding::write_packet_uplink_ack(bts_data(), mac_control_block, this, final); |
| 1387 | encode_gsm_rlcmac_downlink(ack_vec, mac_control_block); |
| 1388 | bitvec_pack(ack_vec, msgb_put(msg, 23)); |
| 1389 | bitvec_free(ack_vec); |
| 1390 | talloc_free(mac_control_block); |
| 1391 | |
| 1392 | /* 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] | 1393 | * TBF on PACCH. it is only allowed when TLLI is acknowledged. */ |
Daniel Willmann | 7e994e3 | 2014-08-07 15:49:21 +0200 | [diff] [blame] | 1394 | m_contention_resolution_done = 1; |
Holger Hans Peter Freyther | 46bcb8d | 2013-10-26 21:04:28 +0200 | [diff] [blame] | 1395 | |
| 1396 | if (final) { |
| 1397 | poll_state = GPRS_RLCMAC_POLL_SCHED; |
| 1398 | poll_fn = (fn + 13) % 2715648; |
| 1399 | /* waiting for final acknowledge */ |
| 1400 | ul_ack_state = GPRS_RLCMAC_UL_ACK_WAIT_ACK; |
Daniel Willmann | 7e994e3 | 2014-08-07 15:49:21 +0200 | [diff] [blame] | 1401 | m_final_ack_sent = 1; |
Holger Hans Peter Freyther | 46bcb8d | 2013-10-26 21:04:28 +0200 | [diff] [blame] | 1402 | } else |
| 1403 | ul_ack_state = GPRS_RLCMAC_UL_ACK_NONE; |
Holger Hans Peter Freyther | 46bcb8d | 2013-10-26 21:04:28 +0200 | [diff] [blame] | 1404 | |
| 1405 | return msg; |
| 1406 | } |
| 1407 | |
Daniel Willmann | 3016888 | 2014-08-07 12:48:29 +0200 | [diff] [blame] | 1408 | int gprs_rlcmac_dl_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] | 1409 | { |
Holger Hans Peter Freyther | 3dc56a3 | 2013-10-26 21:38:30 +0200 | [diff] [blame] | 1410 | int16_t dist; /* must be signed */ |
Holger Hans Peter Freyther | 86dc355 | 2013-11-24 17:28:49 +0100 | [diff] [blame] | 1411 | uint16_t lost = 0, received = 0; |
Holger Hans Peter Freyther | 86dc355 | 2013-11-24 17:28:49 +0100 | [diff] [blame] | 1412 | char show_rbb[65]; |
| 1413 | char show_v_b[RLC_MAX_SNS + 1]; |
Daniel Willmann | 7e994e3 | 2014-08-07 15:49:21 +0200 | [diff] [blame] | 1414 | const uint16_t mod_sns = m_window.mod_sns(); |
Holger Hans Peter Freyther | 86dc355 | 2013-11-24 17:28:49 +0100 | [diff] [blame] | 1415 | |
| 1416 | Decoding::extract_rbb(rbb, show_rbb); |
| 1417 | /* show received array in debug (bit 64..1) */ |
| 1418 | LOGP(DRLCMACDL, LOGL_DEBUG, "- ack: (BSN=%d)\"%s\"" |
Daniel Willmann | 6f7cb2c | 2013-12-11 14:25:20 +0100 | [diff] [blame] | 1419 | "(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] | 1420 | show_rbb, (ssn - 1) & mod_sns); |
| 1421 | |
| 1422 | /* apply received array to receive state (SSN-64..SSN-1) */ |
| 1423 | /* calculate distance of ssn from V(S) */ |
Daniel Willmann | 7e994e3 | 2014-08-07 15:49:21 +0200 | [diff] [blame] | 1424 | dist = (m_window.v_s() - ssn) & mod_sns; |
Holger Hans Peter Freyther | 86dc355 | 2013-11-24 17:28:49 +0100 | [diff] [blame] | 1425 | /* check if distance is less than distance V(A)..V(S) */ |
Daniel Willmann | 7e994e3 | 2014-08-07 15:49:21 +0200 | [diff] [blame] | 1426 | if (dist >= m_window.distance()) { |
Holger Hans Peter Freyther | 86dc355 | 2013-11-24 17:28:49 +0100 | [diff] [blame] | 1427 | /* this might happpen, if the downlink assignment |
| 1428 | * was not received by ms and the ack refers |
| 1429 | * to previous TBF |
| 1430 | * FIXME: we should implement polling for |
| 1431 | * control ack!*/ |
| 1432 | LOGP(DRLCMACDL, LOGL_NOTICE, "- ack range is out of " |
| 1433 | "V(A)..V(S) range %s Free TBF!\n", tbf_name(this)); |
| 1434 | return 1; /* indicate to free TBF */ |
| 1435 | } |
| 1436 | |
Daniel Willmann | 7e994e3 | 2014-08-07 15:49:21 +0200 | [diff] [blame] | 1437 | m_window.update(bts, show_rbb, ssn, |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 1438 | &lost, &received); |
Holger Hans Peter Freyther | 86dc355 | 2013-11-24 17:28:49 +0100 | [diff] [blame] | 1439 | |
| 1440 | /* report lost and received packets */ |
| 1441 | gprs_rlcmac_received_lost(this, received, lost); |
| 1442 | |
| 1443 | /* raise V(A), if possible */ |
Daniel Willmann | 7e994e3 | 2014-08-07 15:49:21 +0200 | [diff] [blame] | 1444 | m_window.raise(m_window.move_window()); |
Holger Hans Peter Freyther | 86dc355 | 2013-11-24 17:28:49 +0100 | [diff] [blame] | 1445 | |
| 1446 | /* show receive state array in debug (V(A)..V(S)-1) */ |
Daniel Willmann | 7e994e3 | 2014-08-07 15:49:21 +0200 | [diff] [blame] | 1447 | m_window.show_state(show_v_b); |
Holger Hans Peter Freyther | 86dc355 | 2013-11-24 17:28:49 +0100 | [diff] [blame] | 1448 | LOGP(DRLCMACDL, LOGL_DEBUG, "- V(B): (V(A)=%d)\"%s\"" |
| 1449 | "(V(S)-1=%d) A=Acked N=Nacked U=Unacked " |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 1450 | "X=Resend-Unacked I=Invalid\n", |
Daniel Willmann | 7e994e3 | 2014-08-07 15:49:21 +0200 | [diff] [blame] | 1451 | m_window.v_a(), show_v_b, |
| 1452 | m_window.v_s_mod(-1)); |
Holger Hans Peter Freyther | 86dc355 | 2013-11-24 17:28:49 +0100 | [diff] [blame] | 1453 | |
Daniel Willmann | 7e994e3 | 2014-08-07 15:49:21 +0200 | [diff] [blame] | 1454 | if (state_is(GPRS_RLCMAC_FINISHED) && m_window.window_empty()) { |
Holger Hans Peter Freyther | 86dc355 | 2013-11-24 17:28:49 +0100 | [diff] [blame] | 1455 | LOGP(DRLCMACDL, LOGL_NOTICE, "Received acknowledge of " |
| 1456 | "all blocks, but without final ack " |
| 1457 | "inidcation (don't worry)\n"); |
| 1458 | } |
| 1459 | return 0; |
| 1460 | } |
| 1461 | |
| 1462 | |
Daniel Willmann | 3016888 | 2014-08-07 12:48:29 +0200 | [diff] [blame] | 1463 | int gprs_rlcmac_dl_tbf::maybe_start_new_window() |
Holger Hans Peter Freyther | 86dc355 | 2013-11-24 17:28:49 +0100 | [diff] [blame] | 1464 | { |
Holger Hans Peter Freyther | 3dc56a3 | 2013-10-26 21:38:30 +0200 | [diff] [blame] | 1465 | struct msgb *msg; |
Holger Hans Peter Freyther | 9c5539d | 2013-11-24 17:34:17 +0100 | [diff] [blame] | 1466 | uint16_t received; |
Holger Hans Peter Freyther | 3dc56a3 | 2013-10-26 21:38:30 +0200 | [diff] [blame] | 1467 | |
Holger Hans Peter Freyther | 3dc56a3 | 2013-10-26 21:38:30 +0200 | [diff] [blame] | 1468 | LOGP(DRLCMACDL, LOGL_DEBUG, "- Final ACK received.\n"); |
Holger Hans Peter Freyther | 3dc56a3 | 2013-10-26 21:38:30 +0200 | [diff] [blame] | 1469 | /* range V(A)..V(S)-1 */ |
Daniel Willmann | 7e994e3 | 2014-08-07 15:49:21 +0200 | [diff] [blame] | 1470 | received = m_window.count_unacked(); |
Holger Hans Peter Freyther | 3dc56a3 | 2013-10-26 21:38:30 +0200 | [diff] [blame] | 1471 | |
| 1472 | /* report all outstanding packets as received */ |
Holger Hans Peter Freyther | 9c5539d | 2013-11-24 17:34:17 +0100 | [diff] [blame] | 1473 | gprs_rlcmac_received_lost(this, received, 0); |
Holger Hans Peter Freyther | 3dc56a3 | 2013-10-26 21:38:30 +0200 | [diff] [blame] | 1474 | |
Daniel Willmann | 73191a4 | 2014-05-30 17:58:00 +0200 | [diff] [blame] | 1475 | tbf_new_state(this, GPRS_RLCMAC_WAIT_RELEASE); |
| 1476 | |
Holger Hans Peter Freyther | 3dc56a3 | 2013-10-26 21:38:30 +0200 | [diff] [blame] | 1477 | /* check for LLC PDU in the LLC Queue */ |
| 1478 | msg = llc_dequeue(gprs_bssgp_pcu_current_bctx()); |
| 1479 | if (!msg) { |
| 1480 | /* no message, start T3193, change state to RELEASE */ |
Holger Hans Peter Freyther | 86dc355 | 2013-11-24 17:28:49 +0100 | [diff] [blame] | 1481 | 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] | 1482 | /* start T3193 */ |
Holger Hans Peter Freyther | 3dc56a3 | 2013-10-26 21:38:30 +0200 | [diff] [blame] | 1483 | tbf_timer_start(this, 3193, |
| 1484 | bts_data()->t3193_msec / 1000, |
| 1485 | (bts_data()->t3193_msec % 1000) * 1000); |
Holger Hans Peter Freyther | 3dc56a3 | 2013-10-26 21:38:30 +0200 | [diff] [blame] | 1486 | |
| 1487 | return 0; |
| 1488 | } |
Holger Hans Peter Freyther | 3dc56a3 | 2013-10-26 21:38:30 +0200 | [diff] [blame] | 1489 | |
Holger Hans Peter Freyther | 55cf994 | 2013-11-13 18:15:45 +0100 | [diff] [blame] | 1490 | /* we have more data so we will re-use this tbf */ |
| 1491 | reuse_tbf(msg->data, msg->len); |
| 1492 | msgb_free(msg); |
Holger Hans Peter Freyther | 3dc56a3 | 2013-10-26 21:38:30 +0200 | [diff] [blame] | 1493 | return 0; |
| 1494 | } |
| 1495 | |
Daniel Willmann | 6c813fc | 2014-07-30 19:12:27 +0200 | [diff] [blame] | 1496 | int gprs_rlcmac_dl_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] | 1497 | { |
| 1498 | LOGP(DRLCMACDL, LOGL_DEBUG, "%s downlink acknowledge\n", tbf_name(this)); |
| 1499 | |
| 1500 | if (!final_ack) |
| 1501 | return update_window(ssn, rbb); |
| 1502 | return maybe_start_new_window(); |
| 1503 | } |
| 1504 | |
Holger Hans Peter Freyther | 964ddb6 | 2013-10-16 17:53:23 +0200 | [diff] [blame] | 1505 | void gprs_rlcmac_tbf::free_all(struct gprs_rlcmac_trx *trx) |
| 1506 | { |
| 1507 | for (uint8_t tfi = 0; tfi < 32; tfi++) { |
| 1508 | struct gprs_rlcmac_tbf *tbf; |
| 1509 | |
| 1510 | tbf = trx->ul_tbf[tfi]; |
| 1511 | if (tbf) |
| 1512 | tbf_free(tbf); |
| 1513 | tbf = trx->dl_tbf[tfi]; |
| 1514 | if (tbf) |
| 1515 | tbf_free(tbf); |
| 1516 | } |
| 1517 | } |
Holger Hans Peter Freyther | 4f6a4e5d | 2013-10-16 17:58:46 +0200 | [diff] [blame] | 1518 | |
| 1519 | void gprs_rlcmac_tbf::free_all(struct gprs_rlcmac_pdch *pdch) |
| 1520 | { |
| 1521 | for (uint8_t tfi = 0; tfi < 32; tfi++) { |
| 1522 | struct gprs_rlcmac_tbf *tbf; |
| 1523 | |
Daniel Willmann | 17a1d5e | 2014-05-30 20:21:30 +0200 | [diff] [blame] | 1524 | tbf = pdch->ul_tbf_by_tfi(tfi); |
Holger Hans Peter Freyther | 4f6a4e5d | 2013-10-16 17:58:46 +0200 | [diff] [blame] | 1525 | if (tbf) |
| 1526 | tbf_free(tbf); |
Daniel Willmann | 17a1d5e | 2014-05-30 20:21:30 +0200 | [diff] [blame] | 1527 | tbf = pdch->dl_tbf_by_tfi(tfi); |
Holger Hans Peter Freyther | 4f6a4e5d | 2013-10-16 17:58:46 +0200 | [diff] [blame] | 1528 | if (tbf) |
| 1529 | tbf_free(tbf); |
| 1530 | } |
| 1531 | } |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 1532 | |
Holger Hans Peter Freyther | 474685e | 2013-10-27 17:01:14 +0100 | [diff] [blame] | 1533 | void gprs_rlcmac_tbf::tlli_mark_valid() |
| 1534 | { |
| 1535 | m_tlli_valid = true; |
| 1536 | } |
| 1537 | |
| 1538 | void gprs_rlcmac_tbf::update_tlli(uint32_t tlli) |
| 1539 | { |
| 1540 | if (tlli == m_tlli) |
| 1541 | return; |
| 1542 | |
Holger Hans Peter Freyther | b809866 | 2013-10-30 14:50:17 +0100 | [diff] [blame] | 1543 | bool changedUl = false; |
| 1544 | |
| 1545 | /* |
| 1546 | * During a Routing Area Update (due the assignment of a new |
| 1547 | * P-TMSI) the tlli can change. We notice this when receiving |
| 1548 | * a PACKET CONTROL ACK. |
| 1549 | * When we get a TLLI change on the DL we will look if there |
| 1550 | * is a UL TBF and change the tlli there as well. |
| 1551 | * |
| 1552 | * TODO: There could be multiple DL and UL TBFs and we should |
| 1553 | * have a proper way to link all the related TBFs so we can do |
| 1554 | * a group update. |
| 1555 | */ |
| 1556 | if (m_tlli_valid && direction == GPRS_RLCMAC_DL_TBF) { |
| 1557 | gprs_rlcmac_tbf *ul_tbf; |
Daniel Willmann | b59d61b | 2014-07-02 17:58:14 +0200 | [diff] [blame] | 1558 | ul_tbf = bts->ul_tbf_by_tlli(m_tlli); |
Holger Hans Peter Freyther | b809866 | 2013-10-30 14:50:17 +0100 | [diff] [blame] | 1559 | |
| 1560 | if (ul_tbf) { |
| 1561 | ul_tbf->m_tlli = tlli; |
| 1562 | changedUl = true; |
| 1563 | } |
| 1564 | } |
| 1565 | |
Holger Hans Peter Freyther | bc1626e | 2013-10-30 19:50:49 +0100 | [diff] [blame] | 1566 | /* update the timing advance for the new tlli */ |
| 1567 | bts->timing_advance()->update(m_tlli, tlli, ta); |
| 1568 | |
Holger Hans Peter Freyther | b809866 | 2013-10-30 14:50:17 +0100 | [diff] [blame] | 1569 | LOGP(DRLCMAC, LOGL_NOTICE, |
| 1570 | "%s changing tlli from TLLI=0x%08x TLLI=0x%08x ul_changed=%d\n", |
| 1571 | tbf_name(this), m_tlli, tlli, changedUl); |
Holger Hans Peter Freyther | 474685e | 2013-10-27 17:01:14 +0100 | [diff] [blame] | 1572 | m_tlli = tlli; |
| 1573 | } |
| 1574 | |
Holger Hans Peter Freyther | 4c06d91 | 2013-11-25 23:05:26 +0100 | [diff] [blame] | 1575 | int gprs_rlcmac_tbf::extract_tlli(const uint8_t *data, const size_t len) |
| 1576 | { |
| 1577 | struct gprs_rlcmac_tbf *dl_tbf, *ul_tbf; |
| 1578 | struct rlc_ul_header *rh = (struct rlc_ul_header *)data; |
| 1579 | uint32_t new_tlli; |
| 1580 | int rc; |
| 1581 | |
| 1582 | /* no TLLI yet */ |
| 1583 | if (!rh->ti) { |
| 1584 | LOGP(DRLCMACUL, LOGL_NOTICE, "UL DATA TFI=%d without " |
| 1585 | "TLLI, but no TLLI received yet\n", rh->tfi); |
| 1586 | return 0; |
| 1587 | } |
| 1588 | rc = Decoding::tlli_from_ul_data(data, len, &new_tlli); |
| 1589 | if (rc) { |
| 1590 | bts->decode_error(); |
| 1591 | LOGP(DRLCMACUL, LOGL_NOTICE, "Failed to decode TLLI " |
| 1592 | "of UL DATA TFI=%d.\n", rh->tfi); |
| 1593 | return 0; |
| 1594 | } |
| 1595 | update_tlli(new_tlli); |
| 1596 | LOGP(DRLCMACUL, LOGL_INFO, "Decoded premier TLLI=0x%08x of " |
| 1597 | "UL DATA TFI=%d.\n", tlli(), rh->tfi); |
Daniel Willmann | b59d61b | 2014-07-02 17:58:14 +0200 | [diff] [blame] | 1598 | if ((dl_tbf = bts->dl_tbf_by_tlli(tlli()))) { |
Holger Hans Peter Freyther | 4c06d91 | 2013-11-25 23:05:26 +0100 | [diff] [blame] | 1599 | LOGP(DRLCMACUL, LOGL_NOTICE, "Got RACH from " |
| 1600 | "TLLI=0x%08x while %s still exists. " |
| 1601 | "Killing pending DL TBF\n", tlli(), |
| 1602 | tbf_name(dl_tbf)); |
| 1603 | tbf_free(dl_tbf); |
Holger Hans Peter Freyther | 3d0cc2f | 2014-01-16 10:09:42 +0100 | [diff] [blame] | 1604 | dl_tbf = NULL; |
Holger Hans Peter Freyther | 4c06d91 | 2013-11-25 23:05:26 +0100 | [diff] [blame] | 1605 | } |
Daniel Willmann | b59d61b | 2014-07-02 17:58:14 +0200 | [diff] [blame] | 1606 | /* 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] | 1607 | * yet marked valid */ |
Daniel Willmann | b59d61b | 2014-07-02 17:58:14 +0200 | [diff] [blame] | 1608 | if ((ul_tbf = bts->ul_tbf_by_tlli(tlli()))) { |
Holger Hans Peter Freyther | 4c06d91 | 2013-11-25 23:05:26 +0100 | [diff] [blame] | 1609 | LOGP(DRLCMACUL, LOGL_NOTICE, "Got RACH from " |
| 1610 | "TLLI=0x%08x while %s still exists. " |
| 1611 | "Killing pending UL TBF\n", tlli(), |
| 1612 | tbf_name(ul_tbf)); |
| 1613 | tbf_free(ul_tbf); |
Holger Hans Peter Freyther | 3d0cc2f | 2014-01-16 10:09:42 +0100 | [diff] [blame] | 1614 | ul_tbf = NULL; |
Holger Hans Peter Freyther | 4c06d91 | 2013-11-25 23:05:26 +0100 | [diff] [blame] | 1615 | } |
| 1616 | /* mark TLLI valid now */ |
| 1617 | tlli_mark_valid(); |
| 1618 | /* store current timing advance */ |
| 1619 | bts->timing_advance()->remember(tlli(), ta); |
| 1620 | return 1; |
| 1621 | } |
| 1622 | |
Daniel Willmann | 350f64d | 2014-08-07 14:54:11 +0200 | [diff] [blame] | 1623 | int gprs_rlcmac_ul_tbf::rcv_data_block_acknowledged(const uint8_t *data, size_t len, int8_t rssi) |
Holger Hans Peter Freyther | 77e0597 | 2013-11-06 19:16:43 +0100 | [diff] [blame] | 1624 | { |
Holger Hans Peter Freyther | 77e0597 | 2013-11-06 19:16:43 +0100 | [diff] [blame] | 1625 | struct rlc_ul_header *rh = (struct rlc_ul_header *)data; |
| 1626 | int rc; |
| 1627 | |
Daniel Willmann | 7e994e3 | 2014-08-07 15:49:21 +0200 | [diff] [blame] | 1628 | const uint16_t mod_sns = m_window.mod_sns(); |
| 1629 | const uint16_t ws = m_window.ws(); |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 1630 | |
Holger Hans Peter Freyther | 77e0597 | 2013-11-06 19:16:43 +0100 | [diff] [blame] | 1631 | this->state_flags |= (1 << GPRS_RLCMAC_FLAG_UL_DATA); |
| 1632 | |
| 1633 | LOGP(DRLCMACUL, LOGL_DEBUG, "UL DATA TFI=%d received (V(Q)=%d .. " |
Daniel Willmann | 7e994e3 | 2014-08-07 15:49:21 +0200 | [diff] [blame] | 1634 | "V(R)=%d)\n", rh->tfi, this->m_window.v_q(), |
| 1635 | this->m_window.v_r()); |
Holger Hans Peter Freyther | 77e0597 | 2013-11-06 19:16:43 +0100 | [diff] [blame] | 1636 | |
| 1637 | /* process RSSI */ |
| 1638 | gprs_rlcmac_rssi(this, rssi); |
| 1639 | |
| 1640 | /* get TLLI */ |
| 1641 | if (!this->is_tlli_valid()) { |
Holger Hans Peter Freyther | 4c06d91 | 2013-11-25 23:05:26 +0100 | [diff] [blame] | 1642 | if (!extract_tlli(data, len)) |
Holger Hans Peter Freyther | 77e0597 | 2013-11-06 19:16:43 +0100 | [diff] [blame] | 1643 | return 0; |
Holger Hans Peter Freyther | 77e0597 | 2013-11-06 19:16:43 +0100 | [diff] [blame] | 1644 | /* already have TLLI, but we stille get another one */ |
| 1645 | } else if (rh->ti) { |
| 1646 | uint32_t tlli; |
| 1647 | rc = Decoding::tlli_from_ul_data(data, len, &tlli); |
| 1648 | if (rc) { |
| 1649 | LOGP(DRLCMACUL, LOGL_NOTICE, "Failed to decode TLLI " |
| 1650 | "of UL DATA TFI=%d.\n", rh->tfi); |
| 1651 | return 0; |
| 1652 | } |
| 1653 | if (tlli != this->tlli()) { |
| 1654 | LOGP(DRLCMACUL, LOGL_NOTICE, "TLLI mismatch on UL " |
| 1655 | "DATA TFI=%d. (Ignoring due to contention " |
| 1656 | "resolution)\n", rh->tfi); |
| 1657 | return 0; |
| 1658 | } |
| 1659 | } |
| 1660 | |
Holger Hans Peter Freyther | 77e0597 | 2013-11-06 19:16:43 +0100 | [diff] [blame] | 1661 | /* restart T3169 */ |
| 1662 | tbf_timer_start(this, 3169, bts_data()->t3169, 0); |
| 1663 | |
| 1664 | /* Increment RX-counter */ |
Daniel Willmann | 7e994e3 | 2014-08-07 15:49:21 +0200 | [diff] [blame] | 1665 | this->m_rx_counter++; |
Holger Hans Peter Freyther | 77e0597 | 2013-11-06 19:16:43 +0100 | [diff] [blame] | 1666 | |
Daniel Willmann | 7e994e3 | 2014-08-07 15:49:21 +0200 | [diff] [blame] | 1667 | if (!m_window.is_in_window(rh->bsn)) { |
Holger Hans Peter Freyther | 77e0597 | 2013-11-06 19:16:43 +0100 | [diff] [blame] | 1668 | LOGP(DRLCMACUL, LOGL_DEBUG, "- BSN %d out of window " |
Holger Hans Peter Freyther | f1593b7 | 2013-11-24 20:36:36 +0100 | [diff] [blame] | 1669 | "%d..%d (it's normal)\n", rh->bsn, |
Daniel Willmann | 7e994e3 | 2014-08-07 15:49:21 +0200 | [diff] [blame] | 1670 | m_window.v_q(), |
| 1671 | (m_window.v_q() + ws - 1) & mod_sns); |
Holger Hans Peter Freyther | 3c95776 | 2013-11-26 21:03:56 +0100 | [diff] [blame] | 1672 | maybe_schedule_uplink_acknack(rh); |
Holger Hans Peter Freyther | 77e0597 | 2013-11-06 19:16:43 +0100 | [diff] [blame] | 1673 | return 0; |
| 1674 | } |
Holger Hans Peter Freyther | 6ab5b24 | 2013-11-24 22:43:03 +0100 | [diff] [blame] | 1675 | |
Holger Hans Peter Freyther | 77e0597 | 2013-11-06 19:16:43 +0100 | [diff] [blame] | 1676 | /* Write block to buffer and set receive state array. */ |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 1677 | m_rlc.block(rh->bsn)->put_data(data, len); |
Holger Hans Peter Freyther | 77e0597 | 2013-11-06 19:16:43 +0100 | [diff] [blame] | 1678 | LOGP(DRLCMACUL, LOGL_DEBUG, "- BSN %d storing in window (%d..%d)\n", |
Daniel Willmann | 7e994e3 | 2014-08-07 15:49:21 +0200 | [diff] [blame] | 1679 | rh->bsn, m_window.v_q(), |
| 1680 | (m_window.v_q() + ws - 1) & mod_sns); |
Holger Hans Peter Freyther | 9977e15 | 2013-11-24 22:52:10 +0100 | [diff] [blame] | 1681 | |
Holger Hans Peter Freyther | 77e0597 | 2013-11-06 19:16:43 +0100 | [diff] [blame] | 1682 | /* Raise V(Q) if possible, and retrieve LLC frames from blocks. |
| 1683 | * This is looped until there is a gap (non received block) or |
| 1684 | * the window is empty.*/ |
Daniel Willmann | 7e994e3 | 2014-08-07 15:49:21 +0200 | [diff] [blame] | 1685 | const uint16_t v_q_beg = m_window.v_q(); |
Daniel Willmann | 5584479 | 2013-12-28 14:41:00 +0100 | [diff] [blame] | 1686 | |
Daniel Willmann | 7e994e3 | 2014-08-07 15:49:21 +0200 | [diff] [blame] | 1687 | const uint16_t count = m_window.receive_bsn(rh->bsn); |
Holger Hans Peter Freyther | 7f3e662 | 2013-11-25 23:51:19 +0100 | [diff] [blame] | 1688 | |
| 1689 | /* Retrieve LLC frames from blocks that are ready */ |
| 1690 | for (uint16_t i = 0; i < count; ++i) { |
Holger Hans Peter Freyther | 3cbf9e0 | 2013-11-26 21:43:58 +0100 | [diff] [blame] | 1691 | uint16_t index = (v_q_beg + i) & mod_sns; |
| 1692 | assemble_forward_llc(m_rlc.block(index)); |
Holger Hans Peter Freyther | 77e0597 | 2013-11-06 19:16:43 +0100 | [diff] [blame] | 1693 | } |
| 1694 | |
| 1695 | /* Check CV of last frame in buffer */ |
| 1696 | if (this->state_is(GPRS_RLCMAC_FLOW) /* still in flow state */ |
Daniel Willmann | 7e994e3 | 2014-08-07 15:49:21 +0200 | [diff] [blame] | 1697 | && this->m_window.v_q() == this->m_window.v_r()) { /* if complete */ |
Holger Hans Peter Freyther | 77e0597 | 2013-11-06 19:16:43 +0100 | [diff] [blame] | 1698 | struct rlc_ul_header *last_rh = (struct rlc_ul_header *) |
Daniel Willmann | 7e994e3 | 2014-08-07 15:49:21 +0200 | [diff] [blame] | 1699 | m_rlc.block((m_window.v_r() - 1) & mod_sns)->block; |
Holger Hans Peter Freyther | 77e0597 | 2013-11-06 19:16:43 +0100 | [diff] [blame] | 1700 | LOGP(DRLCMACUL, LOGL_DEBUG, "- No gaps in received block, " |
| 1701 | "last block: BSN=%d CV=%d\n", last_rh->bsn, |
| 1702 | last_rh->cv); |
| 1703 | if (last_rh->cv == 0) { |
| 1704 | LOGP(DRLCMACUL, LOGL_DEBUG, "- Finished with UL " |
| 1705 | "TBF\n"); |
| 1706 | tbf_new_state(this, GPRS_RLCMAC_FINISHED); |
| 1707 | /* Reset N3103 counter. */ |
Daniel Willmann | 7e994e3 | 2014-08-07 15:49:21 +0200 | [diff] [blame] | 1708 | this->m_n3103 = 0; |
Holger Hans Peter Freyther | 77e0597 | 2013-11-06 19:16:43 +0100 | [diff] [blame] | 1709 | } |
| 1710 | } |
| 1711 | |
| 1712 | /* If TLLI is included or if we received half of the window, we send |
| 1713 | * an ack/nack */ |
Holger Hans Peter Freyther | 3c95776 | 2013-11-26 21:03:56 +0100 | [diff] [blame] | 1714 | maybe_schedule_uplink_acknack(rh); |
| 1715 | |
| 1716 | return 0; |
| 1717 | } |
| 1718 | |
Daniel Willmann | 350f64d | 2014-08-07 14:54:11 +0200 | [diff] [blame] | 1719 | void gprs_rlcmac_ul_tbf::maybe_schedule_uplink_acknack(const rlc_ul_header *rh) |
Holger Hans Peter Freyther | 3c95776 | 2013-11-26 21:03:56 +0100 | [diff] [blame] | 1720 | { |
| 1721 | if (rh->si || rh->ti || state_is(GPRS_RLCMAC_FINISHED) |
Daniel Willmann | 7e994e3 | 2014-08-07 15:49:21 +0200 | [diff] [blame] | 1722 | || (m_rx_counter % SEND_ACK_AFTER_FRAMES) == 0) { |
Holger Hans Peter Freyther | 77e0597 | 2013-11-06 19:16:43 +0100 | [diff] [blame] | 1723 | if (rh->si) { |
| 1724 | LOGP(DRLCMACUL, LOGL_NOTICE, "- Scheduling Ack/Nack, " |
| 1725 | "because MS is stalled.\n"); |
| 1726 | } |
| 1727 | if (rh->ti) { |
| 1728 | LOGP(DRLCMACUL, LOGL_DEBUG, "- Scheduling Ack/Nack, " |
| 1729 | "because TLLI is included.\n"); |
| 1730 | } |
Holger Hans Peter Freyther | 3c95776 | 2013-11-26 21:03:56 +0100 | [diff] [blame] | 1731 | if (state_is(GPRS_RLCMAC_FINISHED)) { |
Holger Hans Peter Freyther | 77e0597 | 2013-11-06 19:16:43 +0100 | [diff] [blame] | 1732 | LOGP(DRLCMACUL, LOGL_DEBUG, "- Scheduling Ack/Nack, " |
| 1733 | "because last block has CV==0.\n"); |
| 1734 | } |
Daniel Willmann | 7e994e3 | 2014-08-07 15:49:21 +0200 | [diff] [blame] | 1735 | if ((m_rx_counter % SEND_ACK_AFTER_FRAMES) == 0) { |
Holger Hans Peter Freyther | 77e0597 | 2013-11-06 19:16:43 +0100 | [diff] [blame] | 1736 | LOGP(DRLCMACUL, LOGL_DEBUG, "- Scheduling Ack/Nack, " |
| 1737 | "because %d frames received.\n", |
| 1738 | SEND_ACK_AFTER_FRAMES); |
| 1739 | } |
Holger Hans Peter Freyther | 3c95776 | 2013-11-26 21:03:56 +0100 | [diff] [blame] | 1740 | if (ul_ack_state == GPRS_RLCMAC_UL_ACK_NONE) { |
Holger Hans Peter Freyther | 77e0597 | 2013-11-06 19:16:43 +0100 | [diff] [blame] | 1741 | /* trigger sending at next RTS */ |
Holger Hans Peter Freyther | 3c95776 | 2013-11-26 21:03:56 +0100 | [diff] [blame] | 1742 | ul_ack_state = GPRS_RLCMAC_UL_ACK_SEND_ACK; |
Holger Hans Peter Freyther | 77e0597 | 2013-11-06 19:16:43 +0100 | [diff] [blame] | 1743 | } else { |
| 1744 | /* already triggered */ |
| 1745 | LOGP(DRLCMACUL, LOGL_DEBUG, "- Sending Ack/Nack is " |
| 1746 | "already triggered, don't schedule!\n"); |
| 1747 | } |
| 1748 | } |
Holger Hans Peter Freyther | 77e0597 | 2013-11-06 19:16:43 +0100 | [diff] [blame] | 1749 | } |
| 1750 | |
Holger Hans Peter Freyther | 9948514 | 2013-11-06 20:08:42 +0100 | [diff] [blame] | 1751 | /* Send Uplink unit-data to SGSN. */ |
Daniel Willmann | e2732e2 | 2014-08-07 17:32:01 +0200 | [diff] [blame] | 1752 | int gprs_rlcmac_ul_tbf::snd_ul_ud() |
Holger Hans Peter Freyther | 9948514 | 2013-11-06 20:08:42 +0100 | [diff] [blame] | 1753 | { |
| 1754 | uint8_t qos_profile[3]; |
| 1755 | struct msgb *llc_pdu; |
Holger Hans Peter Freyther | e231026 | 2013-11-13 16:56:15 +0100 | [diff] [blame] | 1756 | 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] | 1757 | struct bssgp_bvc_ctx *bctx = gprs_bssgp_pcu_current_bctx(); |
| 1758 | |
Holger Hans Peter Freyther | e231026 | 2013-11-13 16:56:15 +0100 | [diff] [blame] | 1759 | 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] | 1760 | if (!bctx) { |
| 1761 | LOGP(DBSSGP, LOGL_ERROR, "No bctx\n"); |
Holger Hans Peter Freyther | 758dc12 | 2013-11-06 20:39:45 +0100 | [diff] [blame] | 1762 | m_llc.reset_frame_space(); |
Holger Hans Peter Freyther | 9948514 | 2013-11-06 20:08:42 +0100 | [diff] [blame] | 1763 | return -EIO; |
| 1764 | } |
| 1765 | |
| 1766 | 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] | 1767 | uint8_t *buf = msgb_push(llc_pdu, TL16V_GROSS_LEN(sizeof(uint8_t)*m_llc.frame_length())); |
| 1768 | 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] | 1769 | qos_profile[0] = QOS_PROFILE >> 16; |
| 1770 | qos_profile[1] = QOS_PROFILE >> 8; |
| 1771 | qos_profile[2] = QOS_PROFILE; |
| 1772 | bssgp_tx_ul_ud(bctx, tlli(), qos_profile, llc_pdu); |
| 1773 | |
Holger Hans Peter Freyther | 758dc12 | 2013-11-06 20:39:45 +0100 | [diff] [blame] | 1774 | m_llc.reset_frame_space(); |
Holger Hans Peter Freyther | 9948514 | 2013-11-06 20:08:42 +0100 | [diff] [blame] | 1775 | return 0; |
| 1776 | } |
| 1777 | |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 1778 | const char *tbf_name(gprs_rlcmac_tbf *tbf) |
| 1779 | { |
| 1780 | static char buf[40]; |
| 1781 | 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] | 1782 | tbf->m_tfi, tbf->m_tlli, |
Holger Hans Peter Freyther | bd449f5 | 2013-10-27 16:39:36 +0100 | [diff] [blame] | 1783 | tbf->direction == GPRS_RLCMAC_UL_TBF ? "UL" : "DL"); |
| 1784 | buf[sizeof(buf) - 1] = '\0'; |
| 1785 | return buf; |
| 1786 | } |
Holger Hans Peter Freyther | 758dc12 | 2013-11-06 20:39:45 +0100 | [diff] [blame] | 1787 | |
Holger Hans Peter Freyther | 55cf994 | 2013-11-13 18:15:45 +0100 | [diff] [blame] | 1788 | |
Daniel Willmann | 3016888 | 2014-08-07 12:48:29 +0200 | [diff] [blame] | 1789 | void gprs_rlcmac_dl_tbf::reuse_tbf(const uint8_t *data, const uint16_t len) |
Holger Hans Peter Freyther | 55cf994 | 2013-11-13 18:15:45 +0100 | [diff] [blame] | 1790 | { |
| 1791 | bts->tbf_reused(); |
| 1792 | m_llc.put_frame(data, len); |
| 1793 | bts->llc_frame_sched(); |
| 1794 | |
| 1795 | /* reset rlc states */ |
Daniel Willmann | 7e994e3 | 2014-08-07 15:49:21 +0200 | [diff] [blame] | 1796 | m_tx_counter = 0; |
| 1797 | m_wait_confirm = 0; |
| 1798 | m_window.reset(); |
Holger Hans Peter Freyther | 55cf994 | 2013-11-13 18:15:45 +0100 | [diff] [blame] | 1799 | |
| 1800 | /* keep to flags */ |
| 1801 | state_flags &= GPRS_RLCMAC_FLAG_TO_MASK; |
| 1802 | state_flags &= ~(1 << GPRS_RLCMAC_FLAG_CCCH); |
| 1803 | |
| 1804 | update(); |
| 1805 | |
| 1806 | LOGP(DRLCMAC, LOGL_DEBUG, "%s Trigger dowlink assignment on PACCH, " |
| 1807 | "because another LLC PDU has arrived in between\n", |
| 1808 | tbf_name(this)); |
| 1809 | bts->trigger_dl_ass(this, this, NULL); |
| 1810 | } |
Holger Hans Peter Freyther | c03e382 | 2013-11-24 00:21:32 +0100 | [diff] [blame] | 1811 | |
Daniel Willmann | 3016888 | 2014-08-07 12:48:29 +0200 | [diff] [blame] | 1812 | bool gprs_rlcmac_dl_tbf::dl_window_stalled() const |
Holger Hans Peter Freyther | c03e382 | 2013-11-24 00:21:32 +0100 | [diff] [blame] | 1813 | { |
Daniel Willmann | 7e994e3 | 2014-08-07 15:49:21 +0200 | [diff] [blame] | 1814 | return m_window.window_stalled(); |
Holger Hans Peter Freyther | c03e382 | 2013-11-24 00:21:32 +0100 | [diff] [blame] | 1815 | } |
Holger Hans Peter Freyther | 7a5f3c2 | 2013-11-26 13:08:12 +0100 | [diff] [blame] | 1816 | |
| 1817 | void gprs_rlcmac_tbf::rotate_in_list() |
| 1818 | { |
Daniel Willmann | 1b3864f | 2014-07-30 13:25:19 +0200 | [diff] [blame] | 1819 | llist_del(&list.list); |
Holger Hans Peter Freyther | 7a5f3c2 | 2013-11-26 13:08:12 +0100 | [diff] [blame] | 1820 | if (direction == GPRS_RLCMAC_UL_TBF) |
Daniel Willmann | 1b3864f | 2014-07-30 13:25:19 +0200 | [diff] [blame] | 1821 | llist_add(&list.list, &bts->bts_data()->ul_tbfs); |
Holger Hans Peter Freyther | 7a5f3c2 | 2013-11-26 13:08:12 +0100 | [diff] [blame] | 1822 | else |
Daniel Willmann | 1b3864f | 2014-07-30 13:25:19 +0200 | [diff] [blame] | 1823 | llist_add(&list.list, &bts->bts_data()->dl_tbfs); |
Holger Hans Peter Freyther | 7a5f3c2 | 2013-11-26 13:08:12 +0100 | [diff] [blame] | 1824 | } |
Holger Hans Peter Freyther | 8f399de | 2013-12-25 20:22:35 +0100 | [diff] [blame] | 1825 | |
| 1826 | uint8_t gprs_rlcmac_tbf::tsc() const |
| 1827 | { |
| 1828 | return trx->pdch[first_ts].tsc; |
| 1829 | } |
Daniel Willmann | afa72f5 | 2014-01-15 17:06:19 +0100 | [diff] [blame] | 1830 | |
| 1831 | void tbf_print_vty_info(struct vty *vty, llist_head *ltbf) |
| 1832 | { |
Daniel Willmann | 1b3864f | 2014-07-30 13:25:19 +0200 | [diff] [blame] | 1833 | gprs_rlcmac_tbf *tbf = llist_pods_entry(ltbf, gprs_rlcmac_tbf); |
Daniel Willmann | afa72f5 | 2014-01-15 17:06:19 +0100 | [diff] [blame] | 1834 | |
Daniel Willmann | 772415f | 2014-01-15 17:06:51 +0100 | [diff] [blame] | 1835 | 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] | 1836 | tbf->tlli(), tbf->is_tlli_valid() ? "valid" : "invalid", |
| 1837 | tbf->direction == GPRS_RLCMAC_UL_TBF ? "UL" : "DL", |
| 1838 | tbf->imsi(), VTY_NEWLINE); |
Daniel Willmann | 80367aa | 2014-01-15 17:40:28 +0100 | [diff] [blame] | 1839 | 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] | 1840 | "MS_CLASS=%d%s", |
Holger Hans Peter Freyther | a004799 | 2014-01-16 10:07:20 +0100 | [diff] [blame] | 1841 | tbf->created_ts(), tbf->state_flags, tbf->first_ts, |
Daniel Willmann | 80367aa | 2014-01-15 17:40:28 +0100 | [diff] [blame] | 1842 | tbf->first_common_ts, tbf->control_ts, tbf->ms_class, |
| 1843 | VTY_NEWLINE); |
Daniel Willmann | afa72f5 | 2014-01-15 17:06:19 +0100 | [diff] [blame] | 1844 | vty_out(vty, " TS_alloc="); |
| 1845 | for (int i = 0; i < 8; i++) { |
| 1846 | if (tbf->pdch[i]) |
| 1847 | vty_out(vty, "%d ", i); |
| 1848 | } |
Daniel Willmann | 772415f | 2014-01-15 17:06:51 +0100 | [diff] [blame] | 1849 | 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] | 1850 | } |