1 files changed, 79 insertions, 0 deletions
diff --git a/openbsc/src/libmsc/a_iface.c b/openbsc/src/libmsc/a_iface.c
new file mode 100644
index 000000000..faf2adada
--- /dev/null
+++ b/openbsc/src/libmsc/a_iface.c
@@ -0,0 +1,79 @@
+/* A-interface implementation, from MSC to BSC */
+
+/* (C) 2016 by sysmocom s.m.f.c GmbH <info@sysmocom.de>
+ *
+ * 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/msgb.h>
+#include <osmocom/core/logging.h>
+
+#include <openbsc/debug.h>
+
+#include <openbsc/gsm_data.h>
+
+int gsm0808_submit_dtap(struct gsm_subscriber_connection *conn,
+			struct msgb *msg, int link_id, int allow_sacch)
+{
+	LOGP(DMSC, LOGL_ERROR, "gsm0808_submit_dtap(): message to be sent to"
+	     " BSC, but A interface not yet implemented.\n%s\n",
+	     osmo_hexdump(msg->data, msg->len)
+	     );
+	return -1;
+}
+
+int gsm0808_cipher_mode(struct gsm_subscriber_connection *conn, int cipher,
+			const uint8_t *key, int len, int include_imeisv)
+{
+
+	LOGP(DMSC, LOGL_ERROR, "gsm0808_cipher_mode(): message to be sent to"
+	     " BSC, but A interface not yet implemented.\n");
+	return -1;
+}
+
+/* from gsm_04_08_utils.c *****/
+
+/* 9.2.5 CM service accept */
+int gsm48_tx_mm_serv_ack(struct gsm_subscriber_connection *conn)
+{
+	struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 SERV ACK");
+	struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh));
+
+	gh->proto_discr = GSM48_PDISC_MM;
+	gh->msg_type = GSM48_MT_MM_CM_SERV_ACC;
+
+	DEBUGP(DMM, "-> CM SERVICE ACK\n");
+
+	return gsm0808_submit_dtap(conn, msg, 0, 0);
+}
+
+/* 9.2.6 CM service reject */
+int gsm48_tx_mm_serv_rej(struct gsm_subscriber_connection *conn,
+			 enum gsm48_reject_value value)
+{
+	struct msgb *msg;
+
+	msg = gsm48_create_mm_serv_rej(value);
+	if (!msg) {
+		LOGP(DMM, LOGL_ERROR, "Failed to allocate CM Service Reject.\n");
+		return -1;
+	}
+
+	DEBUGP(DMM, "-> CM SERVICE Reject cause: %d\n", value);
+
+	return gsm0808_submit_dtap(conn, msg, 0, 0);
+}