97 lines
2.5 KiB
C
97 lines
2.5 KiB
C
/* main MSC management code... */
|
|
|
|
/*
|
|
* (C) 2010 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 General Public License as published by
|
|
* the Free Software Foundation; either version 2 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 General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License along
|
|
* with this program; if not, write to the Free Software Foundation, Inc.,
|
|
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
|
|
*
|
|
*/
|
|
|
|
#include <openbsc/bsc_api.h>
|
|
#include <openbsc/debug.h>
|
|
#include <openbsc/transaction.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 void msc_clear_request(struct gsm_subscriber_connection *conn, uint32_t cause)
|
|
{
|
|
gsm0408_clear_request(conn, cause);
|
|
}
|
|
|
|
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);
|
|
|
|
/* TODO: do better */
|
|
return BSC_API_CONN_POL_ACCEPT;
|
|
}
|
|
|
|
static void msc_dtap(struct gsm_subscriber_connection *conn, struct msgb *msg)
|
|
{
|
|
gsm0408_dispatch(conn, msg);
|
|
}
|
|
|
|
static struct bsc_api msc_handler = {
|
|
.sapi_n_reject = msc_sapi_n_reject,
|
|
.clear_request = msc_clear_request,
|
|
.compl_l3 = msc_compl_l3,
|
|
.dtap = msc_dtap,
|
|
};
|
|
|
|
struct bsc_api *msc_bsc_api() {
|
|
return &msc_handler;
|
|
}
|
|
|
|
/* lchan release handling */
|
|
void msc_release_connection(struct gsm_subscriber_connection *conn)
|
|
{
|
|
struct gsm_trans *trans;
|
|
|
|
/* 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;
|
|
|
|
llist_for_each_entry(trans, &conn->bts->network->trans_list, entry) {
|
|
if (trans->conn == conn)
|
|
return;
|
|
}
|
|
|
|
/* no more connections, asking to release the channel */
|
|
conn->in_release = 1;
|
|
gsm0808_clear(conn);
|
|
subscr_con_free(conn);
|
|
}
|