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-rw-r--r--src/libbsc/gsm_subscriber_base.c149
1 files changed, 149 insertions, 0 deletions
diff --git a/src/libbsc/gsm_subscriber_base.c b/src/libbsc/gsm_subscriber_base.c
new file mode 100644
index 00000000..caf84e7b
--- /dev/null
+++ b/src/libbsc/gsm_subscriber_base.c
@@ -0,0 +1,149 @@
+/* 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 <osmocore/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_subscriber(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);
+}
+
+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->net->keep_subscr)
+ subscr_free(subscr);
+ return NULL;
+}
+
+struct gsm_subscriber *subscr_get_or_create(struct gsm_network *net,
+ const char *imsi)
+{
+ struct gsm_subscriber *subscr;
+
+ llist_for_each_entry(subscr, subscr_bsc_active_subscriber(), entry) {
+ if (strcmp(subscr->imsi, imsi) == 0 && subscr->net == net)
+ return subscr_get(subscr);
+ }
+
+ subscr = subscr_alloc();
+ if (!subscr)
+ return NULL;
+
+ strcpy(subscr->imsi, imsi);
+ subscr->net = net;
+ return subscr;
+}
+
+struct gsm_subscriber *subscr_active_by_tmsi(struct gsm_network *net, uint32_t tmsi)
+{
+ struct gsm_subscriber *subscr;
+
+ llist_for_each_entry(subscr, subscr_bsc_active_subscriber(), entry) {
+ if (subscr->tmsi == tmsi && subscr->net == net)
+ return subscr_get(subscr);
+ }
+
+ return NULL;
+}
+
+struct gsm_subscriber *subscr_active_by_imsi(struct gsm_network *net, const char *imsi)
+{
+ struct gsm_subscriber *subscr;
+
+ llist_for_each_entry(subscr, subscr_bsc_active_subscriber(), entry) {
+ if (strcmp(subscr->imsi, imsi) == 0 && subscr->net == net)
+ return subscr_get(subscr);
+ }
+
+ return NULL;
+}
+
+int subscr_purge_inactive(struct gsm_network *net)
+{
+ struct gsm_subscriber *subscr, *tmp;
+ int purged = 0;
+
+ llist_for_each_entry_safe(subscr, tmp, subscr_bsc_active_subscriber(), entry) {
+ if (subscr->net == net && subscr->use_count <= 0) {
+ subscr_free(subscr);
+ purged += 1;
+ }
+ }
+
+ return purged;
+}