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/* Implementation for MSC decisions which interface to send messages out on. */
/* (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/msc/debug.h>
#include <osmocom/msc/gsm_data.h>
#include <osmocom/msc/msc_ifaces.h>
#include <osmocom/msc/gsm_subscriber.h>
#include <osmocom/msc/transaction.h>
#include <osmocom/mgcp_client/mgcp_client.h>
#include <osmocom/msc/vlr.h>
#include <osmocom/msc/a_iface.h>
#include <osmocom/msc/gsm_04_08.h>
#include <osmocom/msc/msc_mgcp.h>
#include "../../bscconfig.h"
#ifdef BUILD_IU
#include <osmocom/ranap/iu_client.h>
#else
#include <osmocom/msc/iu_dummy.h>
#endif /* BUILD_IU */
const struct value_string ran_type_names[] = {
OSMO_VALUE_STRING(RAN_UNKNOWN),
OSMO_VALUE_STRING(RAN_GERAN_A),
OSMO_VALUE_STRING(RAN_UTRAN_IU),
{ 0, NULL }
};
static int msc_tx(struct gsm_subscriber_connection *conn, struct msgb *msg)
{
if (!msg)
return -EINVAL;
if (!conn) {
msgb_free(msg);
return -EINVAL;
}
DEBUGP(DMSC, "msc_tx %u bytes to %s via %s\n",
msg->len, vlr_subscr_name(conn->vsub),
ran_type_name(conn->via_ran));
switch (conn->via_ran) {
case RAN_GERAN_A:
msg->dst = conn;
return a_iface_tx_dtap(msg);
case RAN_UTRAN_IU:
msg->dst = conn->iu.ue_ctx;
return ranap_iu_tx(msg, 0);
default:
LOGP(DMSC, LOGL_ERROR,
"msc_tx(): conn->via_ran invalid (%d)\n",
conn->via_ran);
msgb_free(msg);
return -1;
}
}
int msc_tx_dtap(struct gsm_subscriber_connection *conn,
struct msgb *msg)
{
return msc_tx(conn, msg);
}
/* 9.2.5 CM service accept */
int msc_gsm48_tx_mm_serv_ack(struct gsm_subscriber_connection *conn)
{
struct msgb *msg;
struct gsm48_hdr *gh;
if (!conn)
return -EINVAL;
msg = gsm48_msgb_alloc_name("GSM 04.08 SERV ACC");
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 ACCEPT %s\n",
vlr_subscr_name(conn->vsub));
return msc_tx_dtap(conn, msg);
}
/* 9.2.6 CM service reject */
int msc_gsm48_tx_mm_serv_rej(struct gsm_subscriber_connection *conn,
enum gsm48_reject_value value)
{
struct msgb *msg;
if (!conn)
return -EINVAL;
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 msc_tx_dtap(conn, msg);
}
int msc_tx_common_id(struct gsm_subscriber_connection *conn)
{
if (!conn)
return -EINVAL;
/* Common ID is only sent over IuCS */
if (conn->via_ran != RAN_UTRAN_IU) {
LOGP(DMM, LOGL_INFO,
"%s: Asked to transmit Common ID, but skipping"
" because this is not on UTRAN\n",
vlr_subscr_name(conn->vsub));
return 0;
}
DEBUGP(DIUCS, "%s: tx CommonID %s\n",
vlr_subscr_name(conn->vsub), conn->vsub->imsi);
return ranap_iu_tx_common_id(conn->iu.ue_ctx, conn->vsub->imsi);
}
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