libmsc: Track and update the location update expiry
Set the subscriber expiry timeout to twice the duration of the location
update period and provide functions subscr_expire() and
db_subscriber_expire() to mark subscribers offline that have missed two
location update periods.
This patch increases the DB revision to 3, so the hlr will be
incompatible with prior versions.
We should allow 0 for T3212 as well to disable the location update
period. In that case we will need a way to indicate that in the
database.
diff --git a/openbsc/src/libmsc/gsm_subscriber.c b/openbsc/src/libmsc/gsm_subscriber.c
index 0889400..3e65176 100644
--- a/openbsc/src/libmsc/gsm_subscriber.c
+++ b/openbsc/src/libmsc/gsm_subscriber.c
@@ -25,6 +25,7 @@
#include <stdio.h>
#include <string.h>
#include <assert.h>
+#include <time.h>
#include <osmocom/core/talloc.h>
@@ -333,6 +334,21 @@
s->net = bts->network;
/* Indicate "attached to LAC" */
s->lac = bts->location_area_code;
+
+ /* FIXME: We should allow 0 for T3212 as well to disable the
+ * location update period. In that case we will need a way to
+ * indicate that in the database and then reenable that value in
+ * VTY.
+ */
+
+ /* Table 10.5.33: The T3212 timeout value field is coded as the
+ * binary representation of the timeout value for
+ * periodic updating in decihours. Mark the subscriber as
+ * inactive if it missed two consecutive location updates.
+ * Timeout is twice the t3212 value plus one minute */
+ s->expire_lu = time(NULL) +
+ (bts->si_common.chan_desc.t3212 * 60 * 6 * 2) + 60;
+
LOGP(DMM, LOGL_INFO, "Subscriber %s ATTACHED LAC=%u\n",
subscr_name(s), s->lac);
rc = db_sync_subscriber(s);
@@ -364,6 +380,25 @@
db_subscriber_update(sub);
}
+static void subscr_expire_callback(void *data, long long unsigned int id)
+{
+ struct gsm_network *net = data;
+ struct gsm_subscriber *s =
+ subscr_get_by_id(net, id);
+
+ LOGP(DMM, LOGL_NOTICE, "Expiring inactive subscriber %s (ID %i)\n",
+ subscr_name(s), id);
+ s->lac = GSM_LAC_RESERVED_DETACHED;
+ db_sync_subscriber(s);
+
+ subscr_put(s);
+}
+
+void subscr_expire(struct gsm_network *net)
+{
+ db_subscriber_expire(net, subscr_expire_callback);
+}
+
int subscr_pending_requests(struct gsm_subscriber *sub)
{
struct subscr_request *req;