diff options
Diffstat (limited to 'openbsc/src/libmsc')
| -rw-r--r-- | openbsc/src/libmsc/Makefile.am | 2 | ||||
| -rw-r--r-- | openbsc/src/libmsc/iucs_ranap.c | 119 |
2 files changed, 121 insertions, 0 deletions
diff --git a/openbsc/src/libmsc/Makefile.am b/openbsc/src/libmsc/Makefile.am index 9e13ca5af..a320f7d28 100644 --- a/openbsc/src/libmsc/Makefile.am +++ b/openbsc/src/libmsc/Makefile.am @@ -12,6 +12,7 @@ AM_CFLAGS = \ $(COVERAGE_CFLAGS) \ $(LIBCRYPTO_CFLAGS) \ $(LIBSMPP34_CFLAGS) \ + $(LIBASN1C_CFLAGS) \ $(NULL) noinst_HEADERS = \ @@ -32,6 +33,7 @@ libmsc_a_SOURCES = \ gsm_04_80.c \ gsm_subscriber.c \ iucs.c \ + iucs_ranap.c \ mncc.c \ mncc_builtin.c \ mncc_sock.c \ diff --git a/openbsc/src/libmsc/iucs_ranap.c b/openbsc/src/libmsc/iucs_ranap.c new file mode 100644 index 000000000..b16eebc47 --- /dev/null +++ b/openbsc/src/libmsc/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 <openbsc/vlr.h> +#include <openbsc/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", + vlr_subscr_name(conn->vsub), rab_id); + + return 0; +} + +int iucs_rx_sec_mode_compl(struct gsm_subscriber_connection *conn, + RANAP_SecurityModeCompleteIEs_t *ies) +{ + gsm_cbfn *cb; + + OSMO_ASSERT(conn->via_ran == RAN_UTRAN_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", vlr_subscr_name(conn->vsub)); + return -EINVAL; + } + + /* TODO evalute ies */ + + if (conn->iu.integrity_protection) + LOGP(DIUCS, LOGL_NOTICE, "Integrity Protection" + " was already enabled for %s\n", + vlr_subscr_name(conn->vsub)); + + 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", + vlr_subscr_name(conn->vsub)); + gsm0408_clear_request(conn, 0); + return 0; + + case IU_EVENT_SECURITY_MODE_COMPLETE: + LOGP(DIUCS, LOGL_INFO, "IuCS security mode complete for %s\n", + vlr_subscr_name(conn->vsub)); + 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; + } +} |