subscr: Add the subscr_get_or_create from the on-waves/bsc-master branch

Create a subscriber based on a known IMSI, search the list of
active subscribers if there is already someone like this.

2 files changed, 20 insertions, 0 deletions

diff --git a/openbsc/include/openbsc/gsm_subscriber.h b/openbsc/include/openbsc/gsm_subscriber.h
index 781629c0c..2cf8d8c53 100644
--- a/openbsc/include/openbsc/gsm_subscriber.h
+++ b/openbsc/include/openbsc/gsm_subscriber.h
@@ -77,6 +77,8 @@ struct gsm_subscriber *subscr_get_by_extension(struct gsm_network *net,
 					       const char *ext);
 struct gsm_subscriber *subscr_get_by_id(struct gsm_network *net,
 					unsigned long long id);
+struct gsm_subscriber *subscr_get_or_create(struct gsm_network *net,
+					const char *imsi);
 int subscr_update(struct gsm_subscriber *s, struct gsm_bts *bts, int reason);
 void subscr_put_channel(struct gsm_subscriber_connection *conn);
 void subscr_get_channel(struct gsm_subscriber *subscr,
diff --git a/openbsc/src/gsm_subscriber_base.c b/openbsc/src/gsm_subscriber_base.c
index 4027cd6e9..f5fb16c5a 100644
--- a/openbsc/src/gsm_subscriber_base.c
+++ b/openbsc/src/gsm_subscriber_base.c
@@ -219,3 +219,21 @@ void subscr_put_channel(struct gsm_subscriber_connection *conn)
 		subscr_send_paging_request(conn->subscr);
 }
 
+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;
+}