aboutsummaryrefslogtreecommitdiffstats
path: root/src/libmsc/iucs.c
diff options
context:
space:
mode:
Diffstat (limited to 'src/libmsc/iucs.c')
-rw-r--r--src/libmsc/iucs.c249
1 files changed, 0 insertions, 249 deletions
diff --git a/src/libmsc/iucs.c b/src/libmsc/iucs.c
deleted file mode 100644
index 974ddb3f7..000000000
--- a/src/libmsc/iucs.c
+++ /dev/null
@@ -1,249 +0,0 @@
-/* Code to manage MSC RAN connections over IuCS interface */
-
-/*
- * (C) 2016,2017 by sysmocom s.f.m.c. GmbH <info@sysmocom.de>
- *
- * Author: Neels Hofmeyr <nhofmeyr@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 <inttypes.h>
-
-#include <osmocom/core/logging.h>
-#include <osmocom/ranap/iu_client.h>
-#include <osmocom/msc/debug.h>
-
-#include <osmocom/msc/gsm_data.h>
-#include <osmocom/msc/gsm_subscriber.h>
-#include <osmocom/msc/transaction.h>
-#include <osmocom/msc/vlr.h>
-#include <osmocom/core/byteswap.h>
-
-#include "../../bscconfig.h"
-
-#ifdef BUILD_IU
-#include <osmocom/ranap/iu_client.h>
-extern struct msgb *ranap_new_msg_rab_assign_voice(uint8_t rab_id,
- uint32_t rtp_ip,
- uint16_t rtp_port,
- bool use_x213_nsap);
-#else
-#include <osmocom/msc/iu_dummy.h>
-#endif /* BUILD_IU */
-
-/* For A-interface see libbsc/bsc_api.c subscr_con_allocate() */
-static struct ran_conn *ran_conn_allocate_iu(struct gsm_network *network,
- struct ranap_ue_conn_ctx *ue,
- uint16_t lac)
-{
- struct ran_conn *conn;
-
- DEBUGP(DIUCS, "Allocating IuCS RAN conn: lac %d, conn_id %" PRIx32 "\n",
- lac, ue->conn_id);
-
- conn = ran_conn_alloc(network, OSMO_RAT_UTRAN_IU, lac);
- if (!conn)
- return NULL;
-
- conn->iu.ue_ctx = ue;
- conn->iu.ue_ctx->rab_assign_addr_enc = network->iu.rab_assign_addr_enc;
- return conn;
-}
-
-static int same_ue_conn(struct ranap_ue_conn_ctx *a, struct ranap_ue_conn_ctx *b)
-{
- if (a == b)
- return 1;
- return (a->conn_id == b->conn_id);
-}
-
-static inline void log_subscribers(struct gsm_network *network)
-{
- if (!log_check_level(DIUCS, LOGL_DEBUG))
- return;
-
- struct ran_conn *conn;
- int i = 0;
- llist_for_each_entry(conn, &network->ran_conns, entry) {
- DEBUGP(DIUCS, "%3d: %s", i, vlr_subscr_name(conn->vsub));
- switch (conn->via_ran) {
- case OSMO_RAT_UTRAN_IU:
- DEBUGPC(DIUCS, " Iu");
- if (conn->iu.ue_ctx) {
- DEBUGPC(DIUCS, " conn_id %d",
- conn->iu.ue_ctx->conn_id
- );
- }
- break;
- case OSMO_RAT_GERAN_A:
- DEBUGPC(DIUCS, " A");
- /* TODO log A-interface connection details */
- break;
- case OSMO_RAT_UNKNOWN:
- DEBUGPC(DIUCS, " ?");
- break;
- default:
- DEBUGPC(DIUCS, " invalid");
- break;
- }
- DEBUGPC(DIUCS, "\n");
- i++;
- }
- DEBUGP(DIUCS, "subscribers registered: %d\n", i);
-}
-
-/* Return an existing IuCS RAN connection record for the given
- * connection IDs, or return NULL if not found. */
-struct ran_conn *ran_conn_lookup_iu(
- struct gsm_network *network,
- struct ranap_ue_conn_ctx *ue)
-{
- struct ran_conn *conn;
-
- DEBUGP(DIUCS, "Looking for IuCS subscriber: conn_id %" PRIx32 "\n",
- ue->conn_id);
- log_subscribers(network);
-
- llist_for_each_entry(conn, &network->ran_conns, entry) {
- if (conn->via_ran != OSMO_RAT_UTRAN_IU)
- continue;
- if (!same_ue_conn(conn->iu.ue_ctx, ue))
- continue;
- DEBUGP(DIUCS, "Found IuCS subscriber for conn_id %" PRIx32 "\n",
- ue->conn_id);
- return conn;
- }
- DEBUGP(DIUCS, "No IuCS subscriber found for conn_id %" PRIx32 "\n",
- ue->conn_id);
- return NULL;
-}
-
-/* Receive MM/CC/... message from IuCS (SCCP user SAP).
- * msg->dst must reference a struct ranap_ue_conn_ctx, which identifies the peer that
- * sent the msg.
- *
- * For A-interface see libbsc/bsc_api.c gsm0408_rcvmsg(). */
-int gsm0408_rcvmsg_iucs(struct gsm_network *network, struct msgb *msg,
- uint16_t *lac)
-{
- struct ranap_ue_conn_ctx *ue_ctx;
- struct ran_conn *conn;
-
- ue_ctx = (struct ranap_ue_conn_ctx*)msg->dst;
-
- /* TODO: are there message types that could allow us to skip this
- * search? */
- conn = ran_conn_lookup_iu(network, ue_ctx);
-
- if (conn && lac && (conn->lac != *lac)) {
- LOGP(DIUCS, LOGL_ERROR, "IuCS subscriber has changed LAC"
- " within the same connection, discarding connection:"
- " %s from LAC %d to %d\n",
- vlr_subscr_name(conn->vsub), conn->lac, *lac);
- /* Deallocate conn with previous LAC */
- ran_conn_close(conn, GSM_CAUSE_INV_MAND_INFO);
- /* At this point we could be tolerant and allocate a new
- * connection, but changing the LAC within the same connection
- * is shifty. Rather cancel everything. */
- return -1;
- }
-
- if (conn) {
- /* Make sure we don't receive RR over IuCS; otherwise all
- * messages handled by gsm0408_dispatch() are of interest (CC,
- * MM, SMS, NS_SS, maybe even MM_GPRS and SM_GPRS). */
- struct gsm48_hdr *gh = msgb_l3(msg);
- uint8_t pdisc = gh->proto_discr & 0x0f;
- OSMO_ASSERT(pdisc != GSM48_PDISC_RR);
-
- ran_conn_dtap(conn, msg);
- } else {
- /* allocate a new connection */
-
- if (!lac) {
- LOGP(DIUCS, LOGL_ERROR, "New IuCS subscriber"
- " but no LAC available. Expecting an InitialUE"
- " message containing a LAI IE."
- " Dropping connection.\n");
- return -1;
- }
-
- conn = ran_conn_allocate_iu(network, ue_ctx, *lac);
- if (!conn)
- abort();
-
- /* ownership of conn hereby goes to the MSC: */
- ran_conn_compl_l3(conn, msg, 0);
- }
-
- return 0;
-}
-
-int iu_rab_act_cs(struct gsm_trans *trans)
-{
- struct ran_conn *conn;
- struct msgb *msg;
- bool use_x213_nsap;
- uint32_t conn_id;
- struct ranap_ue_conn_ctx *uectx;
- uint8_t rab_id;
- uint32_t rtp_ip;
- uint16_t rtp_port;
-
- conn = trans->conn;
- uectx = conn->iu.ue_ctx;
- rab_id = conn->iu.rab_id;
- rtp_ip = osmo_htonl(inet_addr(conn->rtp.local_addr_ran));
- rtp_port = conn->rtp.local_port_ran;
- conn_id = uectx->conn_id;
-
- if (rtp_ip == INADDR_NONE) {
- LOGP(DIUCS, LOGL_DEBUG,
- "Assigning RAB: conn_id=%u, rab_id=%d, invalid RTP IP-Address\n",
- conn_id, rab_id);
- return -EINVAL;
- }
- if (rtp_port == 0) {
- LOGP(DIUCS, LOGL_DEBUG,
- "Assigning RAB: conn_id=%u, rab_id=%d, invalid RTP Port\n",
- conn_id, rab_id);
- return -EINVAL;
- }
-
- use_x213_nsap =
- (uectx->rab_assign_addr_enc == RANAP_NSAP_ADDR_ENC_X213);
-
- LOGP(DIUCS, LOGL_DEBUG,
- "Assigning RAB: conn_id=%u, rab_id=%d, rtp=%x:%u, use_x213_nsap=%d\n",
- conn_id, rab_id, rtp_ip, rtp_port, use_x213_nsap);
-
- msg = ranap_new_msg_rab_assign_voice(rab_id, rtp_ip, rtp_port,
- use_x213_nsap);
- msg->l2h = msg->data;
-
- if (ranap_iu_rab_act(uectx, msg))
- LOGP(DIUCS, LOGL_ERROR,
- "Failed to send RAB Assignment: conn_id=%d rab_id=%d rtp=%x:%u\n",
- conn_id, rab_id, rtp_ip, rtp_port);
- return 0;
-}
-
-uint32_t iu_get_conn_id(const struct ranap_ue_conn_ctx *ue)
-{
- return ue->conn_id;
-}
generated by cgit v1.2.3 (git 2.25.1) at 2024-04-23 16:19:32 +0000