diff options
Diffstat (limited to 'openbsc/src/libmsc/osmo_msc.c')
-rw-r--r-- | openbsc/src/libmsc/osmo_msc.c | 104 |
1 files changed, 104 insertions, 0 deletions
diff --git a/openbsc/src/libmsc/osmo_msc.c b/openbsc/src/libmsc/osmo_msc.c new file mode 100644 index 000000000..8c86dcc8e --- /dev/null +++ b/openbsc/src/libmsc/osmo_msc.c @@ -0,0 +1,104 @@ +/* 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 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 <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 int msc_clear_request(struct gsm_subscriber_connection *conn, uint32_t cause) +{ + gsm0408_clear_request(conn, cause); + if (conn->put_channel) { + conn->put_channel = 0; + subscr_put_channel(conn->subscr); + } + return 1; +} + +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, uint8_t link_id, 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); + if (conn->put_channel) { + conn->put_channel = 0; + subscr_put_channel(conn->subscr); + } + subscr_con_free(conn); +} |