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