Harald Welte | b68899d | 2009-01-06 21:47:18 +0000 | [diff] [blame] | 1 | /* Paging helper and manager.... */ |
| 2 | /* (C) 2009 by Holger Hans Peter Freyther <zecke@selfish.org> |
| 3 | * All Rights Reserved |
| 4 | * |
| 5 | * This program is free software; you can redistribute it and/or modify |
| 6 | * it under the terms of the GNU General Public License as published by |
| 7 | * the Free Software Foundation; either version 2 of the License, or |
| 8 | * (at your option) any later version. |
| 9 | * |
| 10 | * This program is distributed in the hope that it will be useful, |
| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | * GNU General Public License for more details. |
| 14 | * |
| 15 | * You should have received a copy of the GNU General Public License along |
| 16 | * with this program; if not, write to the Free Software Foundation, Inc., |
| 17 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. |
| 18 | * |
| 19 | */ |
| 20 | |
| 21 | /* |
| 22 | * Relevant specs: |
| 23 | * 12.21: |
| 24 | * - 9.4.12 for CCCH Local Threshold |
| 25 | * |
| 26 | * 05.58: |
| 27 | * - 8.5.2 CCCH Load indication |
| 28 | * - 9.3.15 Paging Load |
| 29 | * |
| 30 | * Approach: |
| 31 | * - Send paging command to subscriber |
| 32 | * - On Channel Request we will remember the reason |
| 33 | * - After the ACK we will request the identity |
| 34 | * - Then we will send assign the gsm_subscriber and |
| 35 | * - and call a callback |
| 36 | */ |
| 37 | |
Harald Welte | 2f1311b | 2009-01-06 23:50:39 +0000 | [diff] [blame] | 38 | #include <stdio.h> |
| 39 | #include <stdlib.h> |
Holger Freyther | e36e15e | 2009-02-14 18:05:03 +0000 | [diff] [blame] | 40 | #include <assert.h> |
Harald Welte | 2f1311b | 2009-01-06 23:50:39 +0000 | [diff] [blame] | 41 | |
Harald Welte | b68899d | 2009-01-06 21:47:18 +0000 | [diff] [blame] | 42 | #include <openbsc/paging.h> |
Harald Welte | dfe6c7d | 2010-02-20 16:24:02 +0100 | [diff] [blame] | 43 | #include <osmocore/talloc.h> |
Harald Welte | b68899d | 2009-01-06 21:47:18 +0000 | [diff] [blame] | 44 | #include <openbsc/debug.h> |
Holger Freyther | 4af2b48 | 2009-02-14 22:51:03 +0000 | [diff] [blame] | 45 | #include <openbsc/signal.h> |
Harald Welte | 2f1311b | 2009-01-06 23:50:39 +0000 | [diff] [blame] | 46 | #include <openbsc/abis_rsl.h> |
Holger Freyther | ceb59b7 | 2009-02-06 18:54:00 +0000 | [diff] [blame] | 47 | #include <openbsc/gsm_data.h> |
Holger Hans Peter Freyther | ef81178 | 2010-04-10 00:06:17 +0200 | [diff] [blame] | 48 | #include <openbsc/chan_alloc.h> |
Holger Hans Peter Freyther | c6bb3c4 | 2010-06-17 16:43:24 +0800 | [diff] [blame] | 49 | #include <openbsc/bsc_api.h> |
Harald Welte | b68899d | 2009-01-06 21:47:18 +0000 | [diff] [blame] | 50 | |
Harald Welte (local) | d19e58b | 2009-08-15 02:30:58 +0200 | [diff] [blame] | 51 | void *tall_paging_ctx; |
Harald Welte | 2cf161b | 2009-06-20 22:36:41 +0200 | [diff] [blame] | 52 | |
Holger Freyther | 3aa8d6c | 2009-02-04 02:14:45 +0000 | [diff] [blame] | 53 | static unsigned int calculate_group(struct gsm_bts *bts, struct gsm_subscriber *subscr) |
| 54 | { |
| 55 | int ccch_conf; |
| 56 | int bs_cc_chans; |
| 57 | int blocks; |
| 58 | unsigned int group; |
| 59 | |
Harald Welte | a43f789 | 2009-12-01 18:04:30 +0530 | [diff] [blame] | 60 | ccch_conf = bts->si_common.chan_desc.ccch_conf; |
Holger Freyther | 3aa8d6c | 2009-02-04 02:14:45 +0000 | [diff] [blame] | 61 | bs_cc_chans = rsl_ccch_conf_to_bs_cc_chans(ccch_conf); |
| 62 | /* code word + 2, as 2 channels equals 0x0 */ |
Holger Freyther | 152a147 | 2009-02-04 13:38:26 +0000 | [diff] [blame] | 63 | blocks = rsl_number_of_paging_subchannels(bts); |
Holger Freyther | 3aa8d6c | 2009-02-04 02:14:45 +0000 | [diff] [blame] | 64 | group = get_paging_group(str_to_imsi(subscr->imsi), |
| 65 | bs_cc_chans, blocks); |
| 66 | return group; |
| 67 | } |
| 68 | |
Harald Welte | 38c2f13 | 2009-01-06 23:10:57 +0000 | [diff] [blame] | 69 | /* |
| 70 | * Kill one paging request update the internal list... |
| 71 | */ |
Holger Freyther | 1fd3414 | 2009-02-09 23:42:03 +0000 | [diff] [blame] | 72 | static void paging_remove_request(struct gsm_bts_paging_state *paging_bts, |
Holger Freyther | ceb59b7 | 2009-02-06 18:54:00 +0000 | [diff] [blame] | 73 | struct gsm_paging_request *to_be_deleted) |
Holger Freyther | 3d94924 | 2009-02-06 18:08:18 +0000 | [diff] [blame] | 74 | { |
Harald Welte | ff117a8 | 2009-05-23 05:22:08 +0000 | [diff] [blame] | 75 | bsc_del_timer(&to_be_deleted->T3113); |
Harald Welte | 38c2f13 | 2009-01-06 23:10:57 +0000 | [diff] [blame] | 76 | llist_del(&to_be_deleted->entry); |
Harald Welte | 51cce1e | 2009-02-10 17:35:04 +0000 | [diff] [blame] | 77 | subscr_put(to_be_deleted->subscr); |
Harald Welte | 2cf161b | 2009-06-20 22:36:41 +0200 | [diff] [blame] | 78 | talloc_free(to_be_deleted); |
Harald Welte | 38c2f13 | 2009-01-06 23:10:57 +0000 | [diff] [blame] | 79 | } |
| 80 | |
Holger Freyther | 33ba752 | 2009-02-06 22:33:25 +0000 | [diff] [blame] | 81 | static void page_ms(struct gsm_paging_request *request) |
| 82 | { |
Harald Welte | 2f1311b | 2009-01-06 23:50:39 +0000 | [diff] [blame] | 83 | u_int8_t mi[128]; |
Harald Welte | 2f1311b | 2009-01-06 23:50:39 +0000 | [diff] [blame] | 84 | unsigned int mi_len; |
Holger Freyther | 33ba752 | 2009-02-06 22:33:25 +0000 | [diff] [blame] | 85 | unsigned int page_group; |
| 86 | |
Holger Hans Peter Freyther | c50b836 | 2010-04-09 22:02:39 +0200 | [diff] [blame] | 87 | LOGP(DPAG, LOGL_INFO, "Going to send paging commands: imsi: '%s' tmsi: '0x%x'\n", |
Holger Hans Peter Freyther | b28285d | 2009-08-21 14:55:57 +0200 | [diff] [blame] | 88 | request->subscr->imsi, request->subscr->tmsi); |
| 89 | |
| 90 | if (request->subscr->tmsi == GSM_RESERVED_TMSI) |
| 91 | mi_len = gsm48_generate_mid_from_imsi(mi, request->subscr->imsi); |
| 92 | else |
| 93 | mi_len = gsm48_generate_mid_from_tmsi(mi, request->subscr->tmsi); |
Holger Freyther | 33ba752 | 2009-02-06 22:33:25 +0000 | [diff] [blame] | 94 | |
| 95 | page_group = calculate_group(request->bts, request->subscr); |
Holger Hans Peter Freyther | 7700846 | 2010-06-16 14:10:45 +0800 | [diff] [blame] | 96 | gsm0808_page(request->bts, page_group, mi_len, mi, request->chan_type); |
Holger Freyther | 33ba752 | 2009-02-06 22:33:25 +0000 | [diff] [blame] | 97 | } |
| 98 | |
Holger Hans Peter Freyther | 6410d93 | 2010-04-19 19:41:26 +0800 | [diff] [blame^] | 99 | static void paging_give_credit(void *data) |
| 100 | { |
| 101 | struct gsm_bts_paging_state *paging_bts = data; |
| 102 | |
| 103 | LOGP(DPAG, LOGL_NOTICE, "No slots available on bts nr %d\n", paging_bts->bts->nr); |
| 104 | paging_bts->available_slots = 20; |
| 105 | } |
| 106 | |
Holger Freyther | e36e15e | 2009-02-14 18:05:03 +0000 | [diff] [blame] | 107 | /* |
| 108 | * This is kicked by the periodic PAGING LOAD Indicator |
| 109 | * coming from abis_rsl.c |
| 110 | * |
| 111 | * We attempt to iterate once over the list of items but |
| 112 | * only upto available_slots. |
| 113 | */ |
Holger Freyther | b1ffbb6 | 2009-02-11 01:49:15 +0000 | [diff] [blame] | 114 | static void paging_handle_pending_requests(struct gsm_bts_paging_state *paging_bts) |
| 115 | { |
Holger Freyther | e36e15e | 2009-02-14 18:05:03 +0000 | [diff] [blame] | 116 | struct gsm_paging_request *initial_request = NULL; |
| 117 | struct gsm_paging_request *current_request = NULL; |
Harald Welte | 38c2f13 | 2009-01-06 23:10:57 +0000 | [diff] [blame] | 118 | |
Holger Freyther | e36e15e | 2009-02-14 18:05:03 +0000 | [diff] [blame] | 119 | /* |
| 120 | * Determine if the pending_requests list is empty and |
| 121 | * return then. |
| 122 | */ |
Harald Welte | 75a1fa8 | 2009-02-17 01:39:41 +0000 | [diff] [blame] | 123 | if (llist_empty(&paging_bts->pending_requests)) { |
Harald Welte | 75a1fa8 | 2009-02-17 01:39:41 +0000 | [diff] [blame] | 124 | /* since the list is empty, no need to reschedule the timer */ |
Harald Welte | 38c2f13 | 2009-01-06 23:10:57 +0000 | [diff] [blame] | 125 | return; |
| 126 | } |
| 127 | |
Holger Hans Peter Freyther | 19722d4 | 2010-04-09 18:38:06 +0200 | [diff] [blame] | 128 | /* |
Holger Hans Peter Freyther | 6410d93 | 2010-04-19 19:41:26 +0800 | [diff] [blame^] | 129 | * In case the BTS does not provide us with load indication and we |
| 130 | * ran out of slots, call an autofill routine. It might be that the |
| 131 | * BTS did not like our paging messages and then we have counted down |
| 132 | * to zero and we do not get any messages. |
Holger Hans Peter Freyther | 19722d4 | 2010-04-09 18:38:06 +0200 | [diff] [blame] | 133 | */ |
| 134 | if (paging_bts->available_slots == 0) { |
Holger Hans Peter Freyther | 6410d93 | 2010-04-19 19:41:26 +0800 | [diff] [blame^] | 135 | paging_bts->credit_timer.cb = paging_give_credit; |
| 136 | paging_bts->credit_timer.data = paging_bts; |
| 137 | bsc_schedule_timer(&paging_bts->credit_timer, 5, 0); |
| 138 | return; |
Holger Hans Peter Freyther | 19722d4 | 2010-04-09 18:38:06 +0200 | [diff] [blame] | 139 | } |
| 140 | |
Holger Hans Peter Freyther | 754e801 | 2010-04-09 21:53:35 +0200 | [diff] [blame] | 141 | initial_request = llist_entry(paging_bts->pending_requests.next, |
| 142 | struct gsm_paging_request, entry); |
Holger Freyther | e36e15e | 2009-02-14 18:05:03 +0000 | [diff] [blame] | 143 | current_request = initial_request; |
| 144 | |
| 145 | do { |
| 146 | /* handle the paging request now */ |
| 147 | page_ms(current_request); |
| 148 | paging_bts->available_slots--; |
| 149 | |
Holger Hans Peter Freyther | 754e801 | 2010-04-09 21:53:35 +0200 | [diff] [blame] | 150 | /* take the current and add it to the back */ |
| 151 | llist_del(¤t_request->entry); |
| 152 | llist_add_tail(¤t_request->entry, &paging_bts->pending_requests); |
| 153 | |
| 154 | /* take the next request */ |
| 155 | current_request = llist_entry(paging_bts->pending_requests.next, |
| 156 | struct gsm_paging_request, entry); |
Holger Freyther | e36e15e | 2009-02-14 18:05:03 +0000 | [diff] [blame] | 157 | } while (paging_bts->available_slots > 0 |
| 158 | && initial_request != current_request); |
Harald Welte | 75a1fa8 | 2009-02-17 01:39:41 +0000 | [diff] [blame] | 159 | |
Holger Hans Peter Freyther | d4e7888 | 2010-01-27 09:10:05 +0100 | [diff] [blame] | 160 | bsc_schedule_timer(&paging_bts->work_timer, 2, 0); |
Harald Welte | 75a1fa8 | 2009-02-17 01:39:41 +0000 | [diff] [blame] | 161 | } |
| 162 | |
| 163 | static void paging_worker(void *data) |
| 164 | { |
| 165 | struct gsm_bts_paging_state *paging_bts = data; |
| 166 | |
| 167 | paging_handle_pending_requests(paging_bts); |
Harald Welte | 38c2f13 | 2009-01-06 23:10:57 +0000 | [diff] [blame] | 168 | } |
| 169 | |
Holger Freyther | 1fd3414 | 2009-02-09 23:42:03 +0000 | [diff] [blame] | 170 | void paging_init(struct gsm_bts *bts) |
Holger Freyther | ceb59b7 | 2009-02-06 18:54:00 +0000 | [diff] [blame] | 171 | { |
| 172 | bts->paging.bts = bts; |
| 173 | INIT_LLIST_HEAD(&bts->paging.pending_requests); |
Harald Welte | 75a1fa8 | 2009-02-17 01:39:41 +0000 | [diff] [blame] | 174 | bts->paging.work_timer.cb = paging_worker; |
| 175 | bts->paging.work_timer.data = &bts->paging; |
Holger Freyther | 392209c | 2009-02-10 00:06:19 +0000 | [diff] [blame] | 176 | |
| 177 | /* Large number, until we get a proper message */ |
Holger Hans Peter Freyther | 1469600 | 2010-04-09 22:55:55 +0200 | [diff] [blame] | 178 | bts->paging.available_slots = 20; |
Holger Freyther | ceb59b7 | 2009-02-06 18:54:00 +0000 | [diff] [blame] | 179 | } |
| 180 | |
Holger Freyther | 1fd3414 | 2009-02-09 23:42:03 +0000 | [diff] [blame] | 181 | static int paging_pending_request(struct gsm_bts_paging_state *bts, |
Harald Welte | b68899d | 2009-01-06 21:47:18 +0000 | [diff] [blame] | 182 | struct gsm_subscriber *subscr) { |
Holger Freyther | ceb59b7 | 2009-02-06 18:54:00 +0000 | [diff] [blame] | 183 | struct gsm_paging_request *req; |
Harald Welte | b68899d | 2009-01-06 21:47:18 +0000 | [diff] [blame] | 184 | |
| 185 | llist_for_each_entry(req, &bts->pending_requests, entry) { |
| 186 | if (subscr == req->subscr) |
| 187 | return 1; |
| 188 | } |
| 189 | |
| 190 | return 0; |
| 191 | } |
| 192 | |
Harald Welte | 51cce1e | 2009-02-10 17:35:04 +0000 | [diff] [blame] | 193 | static void paging_T3113_expired(void *data) |
| 194 | { |
Holger Freyther | 83e44b0 | 2009-02-14 18:04:59 +0000 | [diff] [blame] | 195 | struct gsm_paging_request *req = (struct gsm_paging_request *)data; |
Harald Welte | 595ad7b | 2009-02-16 22:05:44 +0000 | [diff] [blame] | 196 | struct paging_signal_data sig_data; |
Holger Hans Peter Freyther | fe9da82 | 2009-11-17 10:16:46 +0100 | [diff] [blame] | 197 | void *cbfn_param; |
| 198 | gsm_cbfn *cbfn; |
Harald Welte | 51cce1e | 2009-02-10 17:35:04 +0000 | [diff] [blame] | 199 | |
Holger Hans Peter Freyther | c50b836 | 2010-04-09 22:02:39 +0200 | [diff] [blame] | 200 | LOGP(DPAG, LOGL_INFO, "T3113 expired for request %p (%s)\n", |
Harald Welte | 51cce1e | 2009-02-10 17:35:04 +0000 | [diff] [blame] | 201 | req, req->subscr->imsi); |
| 202 | |
Holger Hans Peter Freyther | 081c00d | 2009-08-20 06:15:21 +0200 | [diff] [blame] | 203 | sig_data.subscr = req->subscr; |
| 204 | sig_data.bts = req->bts; |
Holger Hans Peter Freyther | 86481c2 | 2010-06-17 15:05:57 +0800 | [diff] [blame] | 205 | sig_data.conn = NULL; |
Holger Freyther | 4af2b48 | 2009-02-14 22:51:03 +0000 | [diff] [blame] | 206 | |
Holger Hans Peter Freyther | fe9da82 | 2009-11-17 10:16:46 +0100 | [diff] [blame] | 207 | /* must be destroyed before calling cbfn, to prevent double free */ |
Holger Hans Peter Freyther | 07d838a | 2010-04-08 16:48:46 +0200 | [diff] [blame] | 208 | counter_inc(req->bts->network->stats.paging.expired); |
Holger Hans Peter Freyther | fe9da82 | 2009-11-17 10:16:46 +0100 | [diff] [blame] | 209 | cbfn_param = req->cbfn_param; |
| 210 | cbfn = req->cbfn; |
Harald Welte | 51cce1e | 2009-02-10 17:35:04 +0000 | [diff] [blame] | 211 | paging_remove_request(&req->bts->paging, req); |
Holger Hans Peter Freyther | fe9da82 | 2009-11-17 10:16:46 +0100 | [diff] [blame] | 212 | |
Harald Welte | 24ff6ee | 2009-12-22 00:41:05 +0100 | [diff] [blame] | 213 | |
Sylvain Munaut | ef24dff | 2009-12-19 12:38:10 +0100 | [diff] [blame] | 214 | dispatch_signal(SS_PAGING, S_PAGING_EXPIRED, &sig_data); |
Holger Hans Peter Freyther | fe9da82 | 2009-11-17 10:16:46 +0100 | [diff] [blame] | 215 | if (cbfn) |
| 216 | cbfn(GSM_HOOK_RR_PAGING, GSM_PAGING_EXPIRED, NULL, NULL, |
| 217 | cbfn_param); |
Harald Welte | 51cce1e | 2009-02-10 17:35:04 +0000 | [diff] [blame] | 218 | } |
| 219 | |
Harald Welte | e903edf | 2009-08-15 03:16:17 +0200 | [diff] [blame] | 220 | static int _paging_request(struct gsm_bts *bts, struct gsm_subscriber *subscr, |
Holger Hans Peter Freyther | 2c45123 | 2009-06-10 02:45:42 +0200 | [diff] [blame] | 221 | int type, gsm_cbfn *cbfn, void *data) |
Harald Welte | 09e38af | 2009-02-16 22:52:23 +0000 | [diff] [blame] | 222 | { |
Holger Freyther | ceb59b7 | 2009-02-06 18:54:00 +0000 | [diff] [blame] | 223 | struct gsm_bts_paging_state *bts_entry = &bts->paging; |
| 224 | struct gsm_paging_request *req; |
Harald Welte | b68899d | 2009-01-06 21:47:18 +0000 | [diff] [blame] | 225 | |
Holger Freyther | 49314f6 | 2009-02-14 23:53:20 +0000 | [diff] [blame] | 226 | if (paging_pending_request(bts_entry, subscr)) { |
Holger Hans Peter Freyther | c50b836 | 2010-04-09 22:02:39 +0200 | [diff] [blame] | 227 | LOGP(DPAG, LOGL_INFO, "Paging request already pending for %s\n", subscr->imsi); |
Harald Welte | e903edf | 2009-08-15 03:16:17 +0200 | [diff] [blame] | 228 | return -EEXIST; |
Holger Freyther | 49314f6 | 2009-02-14 23:53:20 +0000 | [diff] [blame] | 229 | } |
| 230 | |
Holger Hans Peter Freyther | c50b836 | 2010-04-09 22:02:39 +0200 | [diff] [blame] | 231 | LOGP(DPAG, LOGL_DEBUG, "Start paging of subscriber %llu on bts %d.\n", |
Harald Welte | f6cea1d | 2009-08-08 15:08:19 +0200 | [diff] [blame] | 232 | subscr->id, bts->nr); |
Harald Welte | 470ec29 | 2009-06-26 20:25:23 +0200 | [diff] [blame] | 233 | req = talloc_zero(tall_paging_ctx, struct gsm_paging_request); |
Harald Welte | b68899d | 2009-01-06 21:47:18 +0000 | [diff] [blame] | 234 | req->subscr = subscr_get(subscr); |
| 235 | req->bts = bts; |
Harald Welte | 38c2f13 | 2009-01-06 23:10:57 +0000 | [diff] [blame] | 236 | req->chan_type = type; |
Harald Welte | 09e38af | 2009-02-16 22:52:23 +0000 | [diff] [blame] | 237 | req->cbfn = cbfn; |
| 238 | req->cbfn_param = data; |
Harald Welte | 51cce1e | 2009-02-10 17:35:04 +0000 | [diff] [blame] | 239 | req->T3113.cb = paging_T3113_expired; |
| 240 | req->T3113.data = req; |
Holger Hans Peter Freyther | 4642d49 | 2009-11-21 21:48:53 +0100 | [diff] [blame] | 241 | bsc_schedule_timer(&req->T3113, bts->network->T3113, 0); |
Holger Freyther | 49314f6 | 2009-02-14 23:53:20 +0000 | [diff] [blame] | 242 | llist_add_tail(&req->entry, &bts_entry->pending_requests); |
Harald Welte | 75a1fa8 | 2009-02-17 01:39:41 +0000 | [diff] [blame] | 243 | |
Harald Welte | ff117a8 | 2009-05-23 05:22:08 +0000 | [diff] [blame] | 244 | if (!bsc_timer_pending(&bts_entry->work_timer)) |
Holger Hans Peter Freyther | d4e7888 | 2010-01-27 09:10:05 +0100 | [diff] [blame] | 245 | bsc_schedule_timer(&bts_entry->work_timer, 2, 0); |
Harald Welte | e903edf | 2009-08-15 03:16:17 +0200 | [diff] [blame] | 246 | |
| 247 | return 0; |
Harald Welte | b68899d | 2009-01-06 21:47:18 +0000 | [diff] [blame] | 248 | } |
Harald Welte | 763da00 | 2009-02-06 12:52:14 +0000 | [diff] [blame] | 249 | |
Harald Welte | e903edf | 2009-08-15 03:16:17 +0200 | [diff] [blame] | 250 | int paging_request(struct gsm_network *network, struct gsm_subscriber *subscr, |
| 251 | int type, gsm_cbfn *cbfn, void *data) |
Holger Hans Peter Freyther | 2c45123 | 2009-06-10 02:45:42 +0200 | [diff] [blame] | 252 | { |
| 253 | struct gsm_bts *bts = NULL; |
Harald Welte (local) | 0abaf33 | 2009-08-15 11:25:45 +0200 | [diff] [blame] | 254 | int num_pages = 0; |
Holger Hans Peter Freyther | 2c45123 | 2009-06-10 02:45:42 +0200 | [diff] [blame] | 255 | |
Harald Welte | ffa55a4 | 2009-12-22 19:07:32 +0100 | [diff] [blame] | 256 | counter_inc(network->stats.paging.attempted); |
Harald Welte | 24ff6ee | 2009-12-22 00:41:05 +0100 | [diff] [blame] | 257 | |
Harald Welte | a1b2858 | 2009-08-01 19:31:47 +0200 | [diff] [blame] | 258 | /* start paging subscriber on all BTS within Location Area */ |
Holger Hans Peter Freyther | 2c45123 | 2009-06-10 02:45:42 +0200 | [diff] [blame] | 259 | do { |
Harald Welte (local) | 0abaf33 | 2009-08-15 11:25:45 +0200 | [diff] [blame] | 260 | int rc; |
| 261 | |
Holger Freyther | 04866d4 | 2009-03-31 04:35:19 +0200 | [diff] [blame] | 262 | bts = gsm_bts_by_lac(network, subscr->lac, bts); |
Holger Hans Peter Freyther | 2c45123 | 2009-06-10 02:45:42 +0200 | [diff] [blame] | 263 | if (!bts) |
| 264 | break; |
Harald Welte (local) | 82ff397 | 2009-12-28 16:36:28 +0100 | [diff] [blame] | 265 | |
| 266 | /* skip all currently inactive TRX */ |
| 267 | if (!trx_is_usable(bts->c0)) |
| 268 | continue; |
| 269 | |
Harald Welte (local) | 0abaf33 | 2009-08-15 11:25:45 +0200 | [diff] [blame] | 270 | num_pages++; |
Holger Hans Peter Freyther | 2c45123 | 2009-06-10 02:45:42 +0200 | [diff] [blame] | 271 | |
Harald Welte | e903edf | 2009-08-15 03:16:17 +0200 | [diff] [blame] | 272 | /* Trigger paging, pass any error to caller */ |
| 273 | rc = _paging_request(bts, subscr, type, cbfn, data); |
| 274 | if (rc < 0) |
| 275 | return rc; |
Holger Hans Peter Freyther | 2c45123 | 2009-06-10 02:45:42 +0200 | [diff] [blame] | 276 | } while (1); |
Harald Welte | e903edf | 2009-08-15 03:16:17 +0200 | [diff] [blame] | 277 | |
Harald Welte | 24ff6ee | 2009-12-22 00:41:05 +0100 | [diff] [blame] | 278 | if (num_pages == 0) |
Harald Welte | ffa55a4 | 2009-12-22 19:07:32 +0100 | [diff] [blame] | 279 | counter_inc(network->stats.paging.detached); |
Harald Welte | 24ff6ee | 2009-12-22 00:41:05 +0100 | [diff] [blame] | 280 | |
Harald Welte (local) | 0abaf33 | 2009-08-15 11:25:45 +0200 | [diff] [blame] | 281 | return num_pages; |
Holger Hans Peter Freyther | 2c45123 | 2009-06-10 02:45:42 +0200 | [diff] [blame] | 282 | } |
| 283 | |
| 284 | |
Harald Welte | 763da00 | 2009-02-06 12:52:14 +0000 | [diff] [blame] | 285 | /* we consciously ignore the type of the request here */ |
Holger Hans Peter Freyther | 2c45123 | 2009-06-10 02:45:42 +0200 | [diff] [blame] | 286 | static void _paging_request_stop(struct gsm_bts *bts, struct gsm_subscriber *subscr, |
Holger Hans Peter Freyther | 86481c2 | 2010-06-17 15:05:57 +0800 | [diff] [blame] | 287 | struct gsm_subscriber_connection *conn) |
Harald Welte | 763da00 | 2009-02-06 12:52:14 +0000 | [diff] [blame] | 288 | { |
Holger Freyther | ceb59b7 | 2009-02-06 18:54:00 +0000 | [diff] [blame] | 289 | struct gsm_bts_paging_state *bts_entry = &bts->paging; |
| 290 | struct gsm_paging_request *req, *req2; |
Harald Welte | 763da00 | 2009-02-06 12:52:14 +0000 | [diff] [blame] | 291 | |
| 292 | llist_for_each_entry_safe(req, req2, &bts_entry->pending_requests, |
| 293 | entry) { |
Holger Freyther | 3d94924 | 2009-02-06 18:08:18 +0000 | [diff] [blame] | 294 | if (req->subscr == subscr) { |
Holger Hans Peter Freyther | 86481c2 | 2010-06-17 15:05:57 +0800 | [diff] [blame] | 295 | if (conn && req->cbfn) { |
Holger Hans Peter Freyther | c50b836 | 2010-04-09 22:02:39 +0200 | [diff] [blame] | 296 | LOGP(DPAG, LOGL_DEBUG, "Stop paging on bts %d, calling cbfn.\n", bts->nr); |
Harald Welte | 09e38af | 2009-02-16 22:52:23 +0000 | [diff] [blame] | 297 | req->cbfn(GSM_HOOK_RR_PAGING, GSM_PAGING_SUCCEEDED, |
Holger Hans Peter Freyther | 86481c2 | 2010-06-17 15:05:57 +0800 | [diff] [blame] | 298 | NULL, conn, req->cbfn_param); |
Harald Welte | 4bfdfe7 | 2009-06-10 23:11:52 +0800 | [diff] [blame] | 299 | } else |
Holger Hans Peter Freyther | c50b836 | 2010-04-09 22:02:39 +0200 | [diff] [blame] | 300 | LOGP(DPAG, LOGL_DEBUG, "Stop paging on bts %d silently.\n", bts->nr); |
Holger Freyther | 1fd3414 | 2009-02-09 23:42:03 +0000 | [diff] [blame] | 301 | paging_remove_request(&bts->paging, req); |
Holger Freyther | 3d94924 | 2009-02-06 18:08:18 +0000 | [diff] [blame] | 302 | break; |
| 303 | } |
Harald Welte | 763da00 | 2009-02-06 12:52:14 +0000 | [diff] [blame] | 304 | } |
| 305 | } |
Holger Freyther | 392209c | 2009-02-10 00:06:19 +0000 | [diff] [blame] | 306 | |
Holger Hans Peter Freyther | 2c45123 | 2009-06-10 02:45:42 +0200 | [diff] [blame] | 307 | /* Stop paging on all other bts' */ |
| 308 | void paging_request_stop(struct gsm_bts *_bts, struct gsm_subscriber *subscr, |
Holger Hans Peter Freyther | 86481c2 | 2010-06-17 15:05:57 +0800 | [diff] [blame] | 309 | struct gsm_subscriber_connection *conn) |
Holger Hans Peter Freyther | 2c45123 | 2009-06-10 02:45:42 +0200 | [diff] [blame] | 310 | { |
| 311 | struct gsm_bts *bts = NULL; |
| 312 | |
Holger Hans Peter Freyther | 927f056 | 2009-08-21 05:43:44 +0200 | [diff] [blame] | 313 | if (_bts) |
Holger Hans Peter Freyther | 86481c2 | 2010-06-17 15:05:57 +0800 | [diff] [blame] | 314 | _paging_request_stop(_bts, subscr, conn); |
Holger Hans Peter Freyther | fdac4cc | 2009-06-10 11:46:58 +0200 | [diff] [blame] | 315 | |
Holger Hans Peter Freyther | 2c45123 | 2009-06-10 02:45:42 +0200 | [diff] [blame] | 316 | do { |
| 317 | /* |
| 318 | * FIXME: Don't use the lac of the subscriber... |
| 319 | * as it might have magically changed the lac.. use the |
| 320 | * location area of the _bts as reconfiguration of the |
| 321 | * network is probably happening less often. |
| 322 | */ |
Holger Hans Peter Freyther | 927f056 | 2009-08-21 05:43:44 +0200 | [diff] [blame] | 323 | bts = gsm_bts_by_lac(subscr->net, subscr->lac, bts); |
Holger Hans Peter Freyther | 2c45123 | 2009-06-10 02:45:42 +0200 | [diff] [blame] | 324 | if (!bts) |
| 325 | break; |
| 326 | |
| 327 | /* Stop paging */ |
Holger Hans Peter Freyther | a581136 | 2010-04-30 13:32:05 +0800 | [diff] [blame] | 328 | if (bts != _bts) |
Holger Hans Peter Freyther | fdac4cc | 2009-06-10 11:46:58 +0200 | [diff] [blame] | 329 | _paging_request_stop(bts, subscr, NULL); |
Holger Hans Peter Freyther | 2c45123 | 2009-06-10 02:45:42 +0200 | [diff] [blame] | 330 | } while (1); |
| 331 | } |
| 332 | |
Holger Freyther | 392209c | 2009-02-10 00:06:19 +0000 | [diff] [blame] | 333 | void paging_update_buffer_space(struct gsm_bts *bts, u_int16_t free_slots) |
| 334 | { |
Holger Hans Peter Freyther | 6410d93 | 2010-04-19 19:41:26 +0800 | [diff] [blame^] | 335 | bsc_del_timer(&bts->paging.credit_timer); |
Holger Freyther | 392209c | 2009-02-10 00:06:19 +0000 | [diff] [blame] | 336 | bts->paging.available_slots = free_slots; |
| 337 | } |