subscr: Add method to find an active subscriber

This is used by the paging code of the osmo_bsc. When we get
a paging response there should be an active subscriber with
the TMSI or IMSI and we can stop paging. There is no need to
allocate a new subscriber.

1 files changed, 24 insertions, 0 deletions

diff --git a/openbsc/src/gsm_subscriber_base.c b/openbsc/src/gsm_subscriber_base.c
index f5fb16c5a..caa22a313 100644
--- a/openbsc/src/gsm_subscriber_base.c
+++ b/openbsc/src/gsm_subscriber_base.c
@@ -237,3 +237,27 @@ struct gsm_subscriber *subscr_get_or_create(struct gsm_network *net,
 	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;
+}