150 lines
3.5 KiB
C
150 lines
3.5 KiB
C
/* The concept of a subscriber as seen by the BSC */
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/* (C) 2008 by Harald Welte <laforge@gnumonks.org>
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* (C) 2009-2010 by Holger Hans Peter Freyther <zecke@selfish.org>
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* (C) 2010 by On-Waves
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*
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* All Rights Reserved
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#include <unistd.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <assert.h>
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#include <osmocore/talloc.h>
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#include <openbsc/gsm_subscriber.h>
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#include <openbsc/debug.h>
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LLIST_HEAD(active_subscribers);
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void *tall_subscr_ctx;
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/* for the gsm_subscriber.c */
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struct llist_head *subscr_bsc_active_subscriber(void)
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{
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return &active_subscribers;
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}
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char *subscr_name(struct gsm_subscriber *subscr)
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{
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if (strlen(subscr->name))
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return subscr->name;
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return subscr->imsi;
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}
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struct gsm_subscriber *subscr_alloc(void)
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{
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struct gsm_subscriber *s;
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s = talloc_zero(tall_subscr_ctx, struct gsm_subscriber);
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if (!s)
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return NULL;
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llist_add_tail(&s->entry, &active_subscribers);
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s->use_count = 1;
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s->tmsi = GSM_RESERVED_TMSI;
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INIT_LLIST_HEAD(&s->requests);
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return s;
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}
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static void subscr_free(struct gsm_subscriber *subscr)
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{
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llist_del(&subscr->entry);
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talloc_free(subscr);
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}
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struct gsm_subscriber *subscr_get(struct gsm_subscriber *subscr)
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{
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subscr->use_count++;
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DEBUGP(DREF, "subscr %s usage increases usage to: %d\n",
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subscr->extension, subscr->use_count);
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return subscr;
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}
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struct gsm_subscriber *subscr_put(struct gsm_subscriber *subscr)
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{
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subscr->use_count--;
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DEBUGP(DREF, "subscr %s usage decreased usage to: %d\n",
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subscr->extension, subscr->use_count);
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if (subscr->use_count <= 0 && !subscr->net->keep_subscr)
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subscr_free(subscr);
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return NULL;
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}
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struct gsm_subscriber *subscr_get_or_create(struct gsm_network *net,
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const char *imsi)
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{
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struct gsm_subscriber *subscr;
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llist_for_each_entry(subscr, subscr_bsc_active_subscriber(), entry) {
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if (strcmp(subscr->imsi, imsi) == 0 && subscr->net == net)
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return subscr_get(subscr);
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}
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subscr = subscr_alloc();
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if (!subscr)
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return NULL;
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strcpy(subscr->imsi, imsi);
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subscr->net = net;
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return subscr;
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}
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struct gsm_subscriber *subscr_active_by_tmsi(struct gsm_network *net, uint32_t tmsi)
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{
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struct gsm_subscriber *subscr;
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llist_for_each_entry(subscr, subscr_bsc_active_subscriber(), entry) {
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if (subscr->tmsi == tmsi && subscr->net == net)
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return subscr_get(subscr);
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}
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return NULL;
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}
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struct gsm_subscriber *subscr_active_by_imsi(struct gsm_network *net, const char *imsi)
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{
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struct gsm_subscriber *subscr;
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llist_for_each_entry(subscr, subscr_bsc_active_subscriber(), entry) {
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if (strcmp(subscr->imsi, imsi) == 0 && subscr->net == net)
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return subscr_get(subscr);
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}
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return NULL;
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}
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int subscr_purge_inactive(struct gsm_network *net)
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{
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struct gsm_subscriber *subscr, *tmp;
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int purged = 0;
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llist_for_each_entry_safe(subscr, tmp, subscr_bsc_active_subscriber(), entry) {
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if (subscr->net == net && subscr->use_count <= 0) {
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subscr_free(subscr);
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purged += 1;
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}
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}
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return purged;
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}
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