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-rw-r--r--openbsc/src/gsm_subscriber.c143
1 files changed, 143 insertions, 0 deletions
diff --git a/openbsc/src/gsm_subscriber.c b/openbsc/src/gsm_subscriber.c
new file mode 100644
index 00000000..3f608ec3
--- /dev/null
+++ b/openbsc/src/gsm_subscriber.c
@@ -0,0 +1,143 @@
+/* Dummy implementation of a subscriber database, roghly HLR/VLR functionality */
+
+/* (C) 2008 by Harald Welte <laforge@gnumonks.org>
+ * (C) 2009 by Holger Hans Peter Freyther <zecke@selfish.org>
+ *
+ * All Rights Reserved
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ */
+
+#include <unistd.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+
+#include <openbsc/gsm_subscriber.h>
+#include <openbsc/debug.h>
+#include <openbsc/db.h>
+
+
+LLIST_HEAD(active_subscribers);
+
+struct gsm_subscriber *subscr_alloc(void)
+{
+ struct gsm_subscriber *s;
+
+ s = malloc(sizeof(struct gsm_subscriber));
+ if (!s)
+ return NULL;
+
+ memset(s, 0, sizeof(*s));
+ llist_add_tail(&s->entry, &active_subscribers);
+ s->use_count = 1;
+
+ return s;
+}
+
+static void subscr_free(struct gsm_subscriber *subscr)
+{
+ llist_del(&subscr->entry);
+ free(subscr);
+}
+
+struct gsm_subscriber *subscr_get_by_tmsi(const char *tmsi)
+{
+ struct gsm_subscriber *subscr;
+
+ /* we might have a record in memory already */
+ llist_for_each_entry(subscr, &active_subscribers, entry) {
+ if (strcmp(subscr->tmsi, tmsi) == 0)
+ return subscr_get(subscr);
+ }
+
+ return db_get_subscriber(GSM_SUBSCRIBER_TMSI, tmsi);
+}
+
+struct gsm_subscriber *subscr_get_by_imsi(const char *imsi)
+{
+ struct gsm_subscriber *subscr;
+
+ llist_for_each_entry(subscr, &active_subscribers, entry) {
+ if (strcmp(subscr->imsi, imsi) == 0)
+ return subscr_get(subscr);
+ }
+
+ return db_get_subscriber(GSM_SUBSCRIBER_IMSI, imsi);
+}
+
+struct gsm_subscriber *subscr_get_by_extension(const char *ext)
+{
+ struct gsm_subscriber *subscr;
+
+ llist_for_each_entry(subscr, &active_subscribers, entry) {
+ if (strcmp(subscr->extension, ext) == 0)
+ return subscr_get(subscr);
+ }
+
+ return db_get_subscriber(GSM_SUBSCRIBER_EXTENSION, ext);
+}
+
+int subscr_update(struct gsm_subscriber *s, struct gsm_bts *bts, int reason)
+{
+ /* FIXME: Migrate pending requests from one BSC to another */
+ switch (reason) {
+ case GSM_SUBSCRIBER_UPDATE_ATTACHED:
+ /* Indicate "attached to LAC" */
+ s->lac = bts->location_area_code;
+ break;
+ case GSM_SUBSCRIBER_UPDATE_DETACHED:
+ /* Only detach if we are currently in this area */
+ if (bts->location_area_code == s->lac)
+ s->lac = 0;
+
+ break;
+ default:
+ fprintf(stderr, "subscr_update with unknown reason: %d\n",
+ reason);
+ break;
+ };
+ return db_sync_subscriber(s);
+}
+
+struct gsm_subscriber *subscr_get(struct gsm_subscriber *subscr)
+{
+ subscr->use_count++;
+ DEBUGP(DCC, "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(DCC, "subscr %s usage decreased usage to: %d\n",
+ subscr->extension, subscr->use_count);
+ if (subscr->use_count <= 0)
+ subscr_free(subscr);
+ return NULL;
+}
+
+void subscr_put_channel(struct gsm_lchan *lchan)
+{
+ /*
+ * FIXME: Continue with other requests now... by checking
+ * the gsm_subscriber inside the gsm_lchan. Drop the ref count
+ * of the lchan after having asked the next requestee to handle
+ * the channel.
+ */
+ put_lchan(lchan);
+}