Holger Hans Peter Freyther | 857e5e6 | 2009-06-12 07:08:13 +0200 | [diff] [blame] | 1 | /* The concept of a subscriber as seen by the BSC */ |
| 2 | |
| 3 | /* (C) 2008 by Harald Welte <laforge@gnumonks.org> |
Holger Hans Peter Freyther | 66efcbc | 2010-06-30 09:22:31 +0800 | [diff] [blame] | 4 | * (C) 2009-2010 by Holger Hans Peter Freyther <zecke@selfish.org> |
Holger Hans Peter Freyther | 85531cc | 2010-10-06 20:37:09 +0800 | [diff] [blame] | 5 | * (C) 2010 by On-Waves |
Holger Hans Peter Freyther | 857e5e6 | 2009-06-12 07:08:13 +0200 | [diff] [blame] | 6 | * |
| 7 | * All Rights Reserved |
| 8 | * |
| 9 | * This program is free software; you can redistribute it and/or modify |
Harald Welte | 9af6ddf | 2011-01-01 15:25:50 +0100 | [diff] [blame] | 10 | * it under the terms of the GNU Affero General Public License as published by |
| 11 | * the Free Software Foundation; either version 3 of the License, or |
Holger Hans Peter Freyther | 857e5e6 | 2009-06-12 07:08:13 +0200 | [diff] [blame] | 12 | * (at your option) any later version. |
| 13 | * |
| 14 | * This program is distributed in the hope that it will be useful, |
| 15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
Harald Welte | 9af6ddf | 2011-01-01 15:25:50 +0100 | [diff] [blame] | 17 | * GNU Affero General Public License for more details. |
Holger Hans Peter Freyther | 857e5e6 | 2009-06-12 07:08:13 +0200 | [diff] [blame] | 18 | * |
Harald Welte | 9af6ddf | 2011-01-01 15:25:50 +0100 | [diff] [blame] | 19 | * You should have received a copy of the GNU Affero General Public License |
| 20 | * along with this program. If not, see <http://www.gnu.org/licenses/>. |
Holger Hans Peter Freyther | 857e5e6 | 2009-06-12 07:08:13 +0200 | [diff] [blame] | 21 | * |
| 22 | */ |
| 23 | |
| 24 | #include <unistd.h> |
| 25 | #include <stdlib.h> |
| 26 | #include <stdio.h> |
| 27 | #include <string.h> |
| 28 | #include <assert.h> |
| 29 | |
Pablo Neira Ayuso | 136f453 | 2011-03-22 16:47:59 +0100 | [diff] [blame] | 30 | #include <osmocom/core/talloc.h> |
Holger Hans Peter Freyther | 857e5e6 | 2009-06-12 07:08:13 +0200 | [diff] [blame] | 31 | #include <openbsc/gsm_subscriber.h> |
Holger Hans Peter Freyther | 857e5e6 | 2009-06-12 07:08:13 +0200 | [diff] [blame] | 32 | #include <openbsc/debug.h> |
Holger Hans Peter Freyther | 857e5e6 | 2009-06-12 07:08:13 +0200 | [diff] [blame] | 33 | |
| 34 | LLIST_HEAD(active_subscribers); |
| 35 | void *tall_subscr_ctx; |
Holger Hans Peter Freyther | 857e5e6 | 2009-06-12 07:08:13 +0200 | [diff] [blame] | 36 | |
| 37 | /* for the gsm_subscriber.c */ |
| 38 | struct llist_head *subscr_bsc_active_subscriber(void) |
| 39 | { |
| 40 | return &active_subscribers; |
| 41 | } |
| 42 | |
Holger Hans Peter Freyther | 857e5e6 | 2009-06-12 07:08:13 +0200 | [diff] [blame] | 43 | |
Holger Hans Peter Freyther | 0610947 | 2010-06-30 12:56:41 +0800 | [diff] [blame] | 44 | char *subscr_name(struct gsm_subscriber *subscr) |
| 45 | { |
| 46 | if (strlen(subscr->name)) |
| 47 | return subscr->name; |
| 48 | |
| 49 | return subscr->imsi; |
| 50 | } |
| 51 | |
Holger Hans Peter Freyther | 857e5e6 | 2009-06-12 07:08:13 +0200 | [diff] [blame] | 52 | struct gsm_subscriber *subscr_alloc(void) |
| 53 | { |
| 54 | struct gsm_subscriber *s; |
| 55 | |
Holger Hans Peter Freyther | 5ea7313 | 2009-10-29 02:29:45 +0100 | [diff] [blame] | 56 | s = talloc_zero(tall_subscr_ctx, struct gsm_subscriber); |
Holger Hans Peter Freyther | 857e5e6 | 2009-06-12 07:08:13 +0200 | [diff] [blame] | 57 | if (!s) |
| 58 | return NULL; |
| 59 | |
Holger Hans Peter Freyther | 857e5e6 | 2009-06-12 07:08:13 +0200 | [diff] [blame] | 60 | llist_add_tail(&s->entry, &active_subscribers); |
| 61 | s->use_count = 1; |
Holger Hans Peter Freyther | 2223025 | 2009-08-19 12:53:57 +0200 | [diff] [blame] | 62 | s->tmsi = GSM_RESERVED_TMSI; |
Holger Hans Peter Freyther | 857e5e6 | 2009-06-12 07:08:13 +0200 | [diff] [blame] | 63 | |
| 64 | INIT_LLIST_HEAD(&s->requests); |
| 65 | |
| 66 | return s; |
| 67 | } |
| 68 | |
| 69 | static void subscr_free(struct gsm_subscriber *subscr) |
| 70 | { |
| 71 | llist_del(&subscr->entry); |
| 72 | talloc_free(subscr); |
| 73 | } |
| 74 | |
| 75 | struct gsm_subscriber *subscr_get(struct gsm_subscriber *subscr) |
| 76 | { |
| 77 | subscr->use_count++; |
Harald Welte | d0c1914 | 2009-12-24 11:46:44 +0100 | [diff] [blame] | 78 | DEBUGP(DREF, "subscr %s usage increases usage to: %d\n", |
Holger Hans Peter Freyther | 857e5e6 | 2009-06-12 07:08:13 +0200 | [diff] [blame] | 79 | subscr->extension, subscr->use_count); |
| 80 | return subscr; |
| 81 | } |
| 82 | |
| 83 | struct gsm_subscriber *subscr_put(struct gsm_subscriber *subscr) |
| 84 | { |
| 85 | subscr->use_count--; |
Harald Welte | d0c1914 | 2009-12-24 11:46:44 +0100 | [diff] [blame] | 86 | DEBUGP(DREF, "subscr %s usage decreased usage to: %d\n", |
Holger Hans Peter Freyther | 857e5e6 | 2009-06-12 07:08:13 +0200 | [diff] [blame] | 87 | subscr->extension, subscr->use_count); |
Holger Hans Peter Freyther | daee5ca | 2010-12-22 12:34:39 +0100 | [diff] [blame] | 88 | if (subscr->use_count <= 0 && !subscr->net->keep_subscr) |
Holger Hans Peter Freyther | 857e5e6 | 2009-06-12 07:08:13 +0200 | [diff] [blame] | 89 | subscr_free(subscr); |
| 90 | return NULL; |
| 91 | } |
| 92 | |
Holger Hans Peter Freyther | d740b68 | 2010-11-15 09:15:01 +0100 | [diff] [blame] | 93 | struct gsm_subscriber *subscr_get_or_create(struct gsm_network *net, |
| 94 | const char *imsi) |
| 95 | { |
| 96 | struct gsm_subscriber *subscr; |
| 97 | |
| 98 | llist_for_each_entry(subscr, subscr_bsc_active_subscriber(), entry) { |
| 99 | if (strcmp(subscr->imsi, imsi) == 0 && subscr->net == net) |
| 100 | return subscr_get(subscr); |
| 101 | } |
| 102 | |
| 103 | subscr = subscr_alloc(); |
| 104 | if (!subscr) |
| 105 | return NULL; |
| 106 | |
| 107 | strcpy(subscr->imsi, imsi); |
| 108 | subscr->net = net; |
| 109 | return subscr; |
| 110 | } |
Holger Hans Peter Freyther | 8dfd241 | 2010-11-15 13:32:33 +0100 | [diff] [blame] | 111 | |
| 112 | struct gsm_subscriber *subscr_active_by_tmsi(struct gsm_network *net, uint32_t tmsi) |
| 113 | { |
| 114 | struct gsm_subscriber *subscr; |
| 115 | |
| 116 | llist_for_each_entry(subscr, subscr_bsc_active_subscriber(), entry) { |
| 117 | if (subscr->tmsi == tmsi && subscr->net == net) |
| 118 | return subscr_get(subscr); |
| 119 | } |
| 120 | |
| 121 | return NULL; |
| 122 | } |
| 123 | |
| 124 | struct gsm_subscriber *subscr_active_by_imsi(struct gsm_network *net, const char *imsi) |
| 125 | { |
| 126 | struct gsm_subscriber *subscr; |
| 127 | |
| 128 | llist_for_each_entry(subscr, subscr_bsc_active_subscriber(), entry) { |
| 129 | if (strcmp(subscr->imsi, imsi) == 0 && subscr->net == net) |
| 130 | return subscr_get(subscr); |
| 131 | } |
| 132 | |
| 133 | return NULL; |
| 134 | } |
Holger Hans Peter Freyther | f694d5f | 2010-12-22 14:31:34 +0100 | [diff] [blame] | 135 | |
| 136 | int subscr_purge_inactive(struct gsm_network *net) |
| 137 | { |
| 138 | struct gsm_subscriber *subscr, *tmp; |
| 139 | int purged = 0; |
| 140 | |
| 141 | llist_for_each_entry_safe(subscr, tmp, subscr_bsc_active_subscriber(), entry) { |
| 142 | if (subscr->net == net && subscr->use_count <= 0) { |
| 143 | subscr_free(subscr); |
| 144 | purged += 1; |
| 145 | } |
| 146 | } |
| 147 | |
| 148 | return purged; |
| 149 | } |