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authorNeels Hofmeyr <nhofmeyr@sysmocom.de>2016-05-30 14:57:14 +0200
committerNeels Hofmeyr <nhofmeyr@sysmocom.de>2017-03-16 15:32:31 +0100
commit4418ca90dd5856124b26a0ec4916b1c3ef8285c7 (patch)
tree896a6031145dd3d3423ef024607211cea72d3ce2 /openbsc/src/osmo-msc/iucs_ranap.c
parent2892f20f6a3b7c24a907b3af4571e82a0e067366 (diff)
osmo-nitb becomes osmo-msc
Diffstat (limited to 'openbsc/src/osmo-msc/iucs_ranap.c')
-rw-r--r--openbsc/src/osmo-msc/iucs_ranap.c119
1 files changed, 119 insertions, 0 deletions
diff --git a/openbsc/src/osmo-msc/iucs_ranap.c b/openbsc/src/osmo-msc/iucs_ranap.c
new file mode 100644
index 000000000..34f5bfe59
--- /dev/null
+++ b/openbsc/src/osmo-msc/iucs_ranap.c
@@ -0,0 +1,119 @@
+/* Implementation of RANAP messages to/from an MSC via an Iu-CS interface.
+ * This keeps direct RANAP dependencies out of libmsc. */
+
+/* (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/logging.h>
+
+#include <osmocom/ranap/ranap_ies_defs.h>
+
+#include <openbsc/debug.h>
+#include <openbsc/gsm_data.h>
+#include <openbsc/gsm_subscriber.h>
+#include <openbsc/iu.h>
+#include <openbsc/iucs.h>
+
+#include "iucs_ranap.h"
+
+/* To continue authorization after a Security Mode Complete */
+int gsm0408_authorize(struct gsm_subscriber_connection *conn);
+
+static int iucs_rx_rab_assign(struct gsm_subscriber_connection *conn,
+ RANAP_RAB_SetupOrModifiedItemIEs_t *setup_ies)
+{
+ uint8_t rab_id;
+ RANAP_RAB_SetupOrModifiedItem_t *item = &setup_ies->raB_SetupOrModifiedItem;
+
+ rab_id = item->rAB_ID.buf[0];
+
+ LOGP(DIUCS, LOGL_NOTICE, "Received RAB assignment event for %s"
+ " rab_id=%hhd\n", subscr_name(conn->subscr), rab_id);
+ /* TODO do stuff like in sgsn_ranap_rab_ass_resp() */
+
+ return 0;
+}
+
+int iucs_rx_sec_mode_compl(struct gsm_subscriber_connection *conn,
+ RANAP_SecurityModeCompleteIEs_t *ies)
+{
+ gsm_cbfn *cb;
+
+ OSMO_ASSERT(conn->via_iface == IFACE_IU);
+
+ if (!conn->sec_operation) {
+ LOGP(DIUCS, LOGL_ERROR,
+ "Received Security Mode Complete message, but no"
+ " authentication/cipher operation in progress"
+ " for subscr %s\n", subscr_name(conn->subscr));
+ return -EINVAL;
+ }
+
+ /* TODO evalute ies */
+
+ if (conn->iu.integrity_protection)
+ LOGP(DIUCS, LOGL_NOTICE, "Integrity Protection"
+ " was already enabled for %s\n",
+ subscr_name(conn->subscr));
+
+ conn->iu.integrity_protection = INTEGRITY_PROTECTION_IK;
+
+ cb = conn->sec_operation->cb;
+ if (cb)
+ cb(GSM_HOOK_RR_SECURITY, GSM_SECURITY_SUCCEEDED, NULL,
+ conn, conn->sec_operation->cb_data);
+ release_security_operation(conn);
+ return 0;
+}
+
+int iucs_rx_ranap_event(struct gsm_network *network,
+ struct ue_conn_ctx *ue_ctx, int type, void *data)
+{
+ struct gsm_subscriber_connection *conn;
+
+ conn = subscr_conn_lookup_iu(network, ue_ctx);
+
+ if (!conn) {
+ LOGP(DRANAP, LOGL_ERROR, "Cannot find subscriber for IU event %u\n", type);
+ return -1;
+ }
+
+ switch (type) {
+ case IU_EVENT_IU_RELEASE:
+ case IU_EVENT_LINK_INVALIDATED:
+ LOGP(DIUCS, LOGL_INFO, "IuCS release for %s\n",
+ subscr_name(conn->subscr));
+ gsm0408_clear_request(conn, 0);
+ return 0;
+
+ case IU_EVENT_SECURITY_MODE_COMPLETE:
+ LOGP(DIUCS, LOGL_INFO, "IuCS security mode complete for %s\n",
+ subscr_name(conn->subscr));
+ return iucs_rx_sec_mode_compl(conn,
+ (RANAP_SecurityModeCompleteIEs_t*)data);
+ case IU_EVENT_RAB_ASSIGN:
+ return iucs_rx_rab_assign(conn,
+ (RANAP_RAB_SetupOrModifiedItemIEs_t*)data);
+ default:
+ LOGP(DIUCS, LOGL_NOTICE, "Unknown message received:"
+ " RANAP event: %i\n", type);
+ return -1;
+ }
+}