1 files changed, 56 insertions, 0 deletions
diff --git a/openbsc/src/libmsc/msc_api.c b/openbsc/src/libmsc/msc_api.c
new file mode 100644
index 000000000..f02b4c669
--- /dev/null
+++ b/openbsc/src/libmsc/msc_api.c
@@ -0,0 +1,56 @@
+/* Implementations for receiving or sending MM|CC|... messages from/to the
+ * BSC|RNC direction, regardless of which particular external interface is
+ * actually involved (A or IuCS). */
+
+/* (C) 2016 by sysmocom s.m.f.c GmbH <info@sysmocom.de>
+ *
+ * Based on parts of osmo_msc.c:
+ * (C) 2010,2013 by Holger Hans Peter Freyther <zecke@selfish.org>
+ * (C) 2010 by On-Waves
+ *
+ * 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 <osmocom/core/logging.h>
+
+#include <openbsc/debug.h>
+
+#include <openbsc/msc_api.h>
+#include <openbsc/gsm_data.h>
+#include <openbsc/transaction.h>
+
+int msc_compl_l3(struct gsm_subscriber_connection *conn, struct msgb *msg,
+		 uint16_t chosen_channel)
+{
+	gsm0408_new_conn(conn);
+	gsm0408_dispatch(conn, msg);
+
+	/*
+	 * If this is a silent call we want the channel to remain open as long as
+	 * possible and this is why we accept this connection regardless of any
+	 * pending transaction or ongoing operation.
+	 */
+	if (conn->silent_call)
+		return MSC_CONN_ACCEPT;
+	if (conn->loc_operation || conn->sec_operation || conn->anch_operation)
+		return MSC_CONN_ACCEPT;
+	if (trans_has_conn(conn))
+		return MSC_CONN_ACCEPT;
+
+	LOGP(DRR, LOGL_INFO, "MSC Complete L3: Rejecting connection.\n");
+	return MSC_CONN_REJECT;
+}
+