move openbsc/* to repos root

This is the first step in creating this repository from the legacy openbsc.git.

Like all other Osmocom repositories, keep the autoconf and automake files in
the repository root. openbsc.git has been the sole exception, which ends now.

Change-Id: I9c6f2a448d9cb1cc088cf1cf6918b69d7e69b4e7

1 files changed, 177 insertions, 0 deletions

diff --git a/src/libmsc/osmo_msc.c b/src/libmsc/osmo_msc.c
new file mode 100644
index 000000000..2389980d3
--- /dev/null
+++ b/src/libmsc/osmo_msc.c
@@ -0,0 +1,177 @@
+/* main MSC management code... */
+
+/*
+ * (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 <openbsc/bsc_api.h>
+#include <openbsc/debug.h>
+#include <openbsc/transaction.h>
+#include <openbsc/db.h>
+
+#include <openbsc/gsm_04_11.h>
+
+static void msc_sapi_n_reject(struct gsm_subscriber_connection *conn, int dlci)
+{
+	int sapi = dlci & 0x7;
+
+	if (sapi == UM_SAPI_SMS)
+		gsm411_sapi_n_reject(conn);
+}
+
+static int msc_clear_request(struct gsm_subscriber_connection *conn, uint32_t cause)
+{
+	gsm0408_clear_request(conn, cause);
+	return 1;
+}
+
+static 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 BSC_API_CONN_POL_ACCEPT;
+	if (conn->loc_operation || conn->sec_operation || conn->anch_operation)
+		return BSC_API_CONN_POL_ACCEPT;
+	if (trans_has_conn(conn))
+		return BSC_API_CONN_POL_ACCEPT;
+
+	LOGP(DRR, LOGL_INFO, "MSC Complete L3: Rejecting connection.\n");
+	return BSC_API_CONN_POL_REJECT;
+}
+
+static void msc_dtap(struct gsm_subscriber_connection *conn, uint8_t link_id, struct msgb *msg)
+{
+	gsm0408_dispatch(conn, msg);
+}
+
+static void msc_assign_compl(struct gsm_subscriber_connection *conn,
+			     uint8_t rr_cause, uint8_t chosen_channel,
+			     uint8_t encr_alg_id, uint8_t speec)
+{
+	LOGP(DRR, LOGL_DEBUG, "MSC assign complete (do nothing).\n");
+}
+
+static void msc_assign_fail(struct gsm_subscriber_connection *conn,
+			    uint8_t cause, uint8_t *rr_cause)
+{
+	LOGP(DRR, LOGL_DEBUG, "MSC assign failure (do nothing).\n");
+}
+
+static void msc_classmark_chg(struct gsm_subscriber_connection *conn,
+			      const uint8_t *cm2, uint8_t cm2_len,
+			      const uint8_t *cm3, uint8_t cm3_len)
+{
+	struct gsm_subscriber *subscr = conn->subscr;
+
+	if (subscr) {
+		subscr->equipment.classmark2_len = cm2_len;
+		memcpy(subscr->equipment.classmark2, cm2, cm2_len);
+		if (cm3) {
+			subscr->equipment.classmark3_len = cm3_len;
+			memcpy(subscr->equipment.classmark3, cm3, cm3_len);
+		}
+		db_sync_equipment(&subscr->equipment);
+	}
+}
+
+static void msc_ciph_m_compl(struct gsm_subscriber_connection *conn,
+			     struct msgb *msg, uint8_t alg_id)
+{
+	gsm_cbfn *cb;
+
+	DEBUGP(DRR, "CIPHERING MODE COMPLETE\n");
+
+	/* Safety check */
+	if (!conn->sec_operation) {
+		DEBUGP(DRR, "No authentication/cipher operation in progress !!!\n");
+		return;
+	}
+
+	/* FIXME: check for MI (if any) */
+
+	/* Call back whatever was in progress (if anything) ... */
+	cb = conn->sec_operation->cb;
+	if (cb) {
+		cb(GSM_HOOK_RR_SECURITY, GSM_SECURITY_SUCCEEDED,
+			NULL, conn, conn->sec_operation->cb_data);
+
+	}
+
+	/* Complete the operation */
+	release_security_operation(conn);
+}
+
+
+
+static struct bsc_api msc_handler = {
+	.sapi_n_reject = msc_sapi_n_reject,
+	.compl_l3 = msc_compl_l3,
+	.dtap = msc_dtap,
+	.clear_request = msc_clear_request,
+	.assign_compl = msc_assign_compl,
+	.assign_fail = msc_assign_fail,
+	.classmark_chg = msc_classmark_chg,
+	.cipher_mode_compl = msc_ciph_m_compl,
+};
+
+struct bsc_api *msc_bsc_api() {
+	return &msc_handler;
+}
+
+/* lchan release handling */
+void msc_release_connection(struct gsm_subscriber_connection *conn)
+{
+	/* skip when we are in release, e.g. due an error */
+	if (conn->in_release)
+		return;
+
+	/* skip releasing of silent calls as they have no transaction */
+	if (conn->silent_call)
+		return;
+
+	/* check if there is a pending operation */
+	if (conn->loc_operation || conn->sec_operation || conn->anch_operation)
+		return;
+
+	if (trans_has_conn(conn))
+		return;
+
+	/* no more connections, asking to release the channel */
+
+	/*
+	 * We had stopped the LU expire timer T3212. Now we are about
+	 * to send the MS back to the idle state and this should lead
+	 * to restarting the timer. Set the new expiration time.
+	 */
+	if (conn->expire_timer_stopped)
+		subscr_update_expire_lu(conn->subscr, conn->bts);
+
+	conn->in_release = 1;
+	gsm0808_clear(conn);
+	msc_subscr_con_free(conn);
+}