sgsn: Add gprs_subscriber.c
This patch adds GPRS specific functions for gsm_subscriber objects
(allocation, retrieval, deletion) and subscriber data
requests/updates. The sgsn_update_subscriber_data callback is used to
notify the sgsn about updates and is extended by a parameter that
passes a reference to a gsm_subscriber.
Sponsored-by: On-Waves ehf
diff --git a/openbsc/src/gprs/gprs_subscriber.c b/openbsc/src/gprs/gprs_subscriber.c
new file mode 100644
index 0000000..78fa3e1
--- /dev/null
+++ b/openbsc/src/gprs/gprs_subscriber.c
@@ -0,0 +1,144 @@
+/* MS subscriber data handling */
+
+/* (C) 2014 by sysmocom s.f.m.c. GmbH
+ *
+ * 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 <openbsc/gsm_subscriber.h>
+
+#include <openbsc/sgsn.h>
+#include <openbsc/gprs_sgsn.h>
+#include <openbsc/gprs_gmm.h>
+
+#include <openbsc/debug.h>
+
+extern void *tall_bsc_ctx;
+
+void gprs_subscr_init(struct sgsn_instance *sgi)
+{
+}
+
+struct gsm_subscriber *gprs_subscr_get_or_create(const char *imsi)
+{
+ struct gsm_subscriber *subscr;
+
+ subscr = subscr_get_or_create(NULL, imsi);
+ if (!subscr)
+ return NULL;
+
+ subscr->keep_in_ram = 1;
+
+ return subscr;
+}
+
+struct gsm_subscriber *gprs_subscr_get_by_imsi(const char *imsi)
+{
+ return subscr_active_by_imsi(NULL, imsi);
+}
+
+void gprs_subscr_delete(struct gsm_subscriber *subscr)
+{
+ if (subscr->mm) {
+ subscr_put(subscr->mm->subscr);
+ subscr->mm->subscr = NULL;
+ subscr->mm = NULL;
+ }
+
+ if ((subscr->flags & GPRS_SUBSCRIBER_CANCELLED) ||
+ (subscr->flags & GSM_SUBSCRIBER_FIRST_CONTACT))
+ subscr->keep_in_ram = 0;
+
+ subscr_put(subscr);
+}
+
+void gprs_subscr_put_and_cancel(struct gsm_subscriber *subscr)
+{
+ subscr->authorized = 0;
+ subscr->flags |= GPRS_SUBSCRIBER_CANCELLED;
+
+ gprs_subscr_update(subscr);
+
+ gprs_subscr_delete(subscr);
+}
+
+int gprs_subscr_query(struct gsm_subscriber *subscr)
+{
+ /* TODO: Implement remote query to MSC, ... */
+
+ LOGMMCTXP(LOGL_INFO, subscr->mm,
+ "subscriber data is not available (remote query NYI)\n");
+ return -ENOTSUP;
+}
+
+void gprs_subscr_update(struct gsm_subscriber *subscr)
+{
+ LOGMMCTXP(LOGL_DEBUG, subscr->mm, "Updating subscriber data\n");
+
+ subscr->flags &= ~GPRS_SUBSCRIBER_UPDATE_PENDING;
+ subscr->flags &= ~GSM_SUBSCRIBER_FIRST_CONTACT;
+
+ sgsn_update_subscriber_data(subscr->mm, subscr);
+}
+
+int gprs_subscr_request_update(struct sgsn_mm_ctx *mmctx)
+{
+ struct gsm_subscriber *subscr = NULL;
+ int need_update = 0;
+ int rc;
+
+ LOGMMCTXP(LOGL_DEBUG, mmctx, "Requesting subscriber data update\n");
+
+ if (mmctx->subscr) {
+ subscr = subscr_get(mmctx->subscr);
+ } else if (mmctx->imsi[0]) {
+ subscr = gprs_subscr_get_by_imsi(mmctx->imsi);
+ need_update = 1;
+ }
+
+ if (!subscr) {
+ subscr = gprs_subscr_get_or_create(mmctx->imsi);
+ subscr->flags |= GSM_SUBSCRIBER_FIRST_CONTACT;
+ need_update = 1;
+ }
+
+ if (strcpy(subscr->equipment.imei, mmctx->imei) != 0) {
+ strncpy(subscr->equipment.imei, mmctx->imei, GSM_IMEI_LENGTH-1);
+ subscr->equipment.imei[GSM_IMEI_LENGTH-1] = 0;
+ need_update = 1;
+ }
+
+ if (subscr->lac != mmctx->ra.lac) {
+ subscr->lac = mmctx->ra.lac;
+ need_update = 1;
+ }
+
+ if (need_update) {
+ subscr->flags |= GPRS_SUBSCRIBER_UPDATE_PENDING;
+ if (!mmctx->subscr) {
+ subscr->mm = mmctx;
+ mmctx->subscr = subscr_get(subscr);
+ }
+
+ rc = gprs_subscr_query(subscr);
+ subscr_put(subscr);
+ return rc;
+ }
+ gprs_subscr_update(subscr);
+ subscr_put(subscr);
+ return 0;
+}