| /* |
| * (C) 2010-2013 by Holger Hans Peter Freyther <zecke@selfish.org> |
| * (C) 2010-2013 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/osmo_bsc_grace.h> |
| #include <openbsc/osmo_bsc_rf.h> |
| #include <openbsc/osmo_msc_data.h> |
| #include <openbsc/gsm_04_80.h> |
| #include <openbsc/gsm_subscriber.h> |
| #include <openbsc/paging.h> |
| #include <openbsc/signal.h> |
| |
| int bsc_grace_allow_new_connection(struct gsm_network *network, struct gsm_bts *bts) |
| { |
| if (bts->excl_from_rf_lock) |
| return 1; |
| return network->bsc_data->rf_ctrl->policy == S_RF_ON; |
| } |
| |
| /** |
| * Try to not page if everything the cell is not on. |
| */ |
| int bsc_grace_paging_request(struct gsm_subscriber *subscr, int chan_needed, |
| struct osmo_msc_data *msc) |
| { |
| struct gsm_bts *bts = NULL; |
| |
| if (subscr->group->net->bsc_data->rf_ctrl->policy == S_RF_ON) |
| goto page; |
| |
| /* |
| * Check if there is any BTS that is on for the given lac. Start |
| * with NULL and iterate through all bts. |
| */ |
| do { |
| bts = gsm_bts_by_lac(subscr->group->net, subscr->lac, bts); |
| if (!bts) |
| break; |
| |
| /* |
| * continue if the BTS is not excluded from the lock |
| */ |
| if (!bts->excl_from_rf_lock) |
| continue; |
| |
| /* |
| * now page on this bts |
| */ |
| paging_request_bts(bts, subscr, chan_needed, NULL, msc); |
| } while (1); |
| |
| /* All bts are either off or in the grace period */ |
| return 0; |
| page: |
| return paging_request(subscr->group->net, subscr, chan_needed, NULL, |
| msc); |
| } |
| |
| static int handle_sub(struct gsm_lchan *lchan, const char *text) |
| { |
| struct gsm_subscriber_connection *conn; |
| |
| /* only send it to TCH */ |
| if (lchan->type != GSM_LCHAN_TCH_H && lchan->type != GSM_LCHAN_TCH_F) |
| return -1; |
| |
| /* only send on the primary channel */ |
| conn = lchan->conn; |
| if (!conn) |
| return -1; |
| |
| if (conn->lchan != lchan) |
| return -1; |
| |
| /* only when active */ |
| if (lchan->state != LCHAN_S_ACTIVE) |
| return -1; |
| |
| gsm0480_send_ussdNotify(conn, 0, text); |
| gsm0480_send_releaseComplete(conn); |
| |
| return 0; |
| } |
| |
| /* |
| * The place to handle the grace mode. Right now we will send |
| * USSD messages to the subscriber, in the future we might start |
| * a timer to have different modes for the grace period. |
| */ |
| static int handle_grace(struct gsm_network *network) |
| { |
| int ts_nr, lchan_nr; |
| struct gsm_bts *bts; |
| struct gsm_bts_trx *trx; |
| |
| if (!network->bsc_data->mid_call_txt) |
| return 0; |
| |
| llist_for_each_entry(bts, &network->bts_list, list) { |
| llist_for_each_entry(trx, &bts->trx_list, list) { |
| for (ts_nr = 0; ts_nr < TRX_NR_TS; ++ts_nr) { |
| struct gsm_bts_trx_ts *ts = &trx->ts[ts_nr]; |
| for (lchan_nr = 0; lchan_nr < TS_MAX_LCHAN; ++lchan_nr) { |
| handle_sub(&ts->lchan[lchan_nr], |
| network->bsc_data->mid_call_txt); |
| } |
| } |
| } |
| } |
| return 0; |
| } |
| |
| static int handle_rf_signal(unsigned int subsys, unsigned int signal, |
| void *handler_data, void *signal_data) |
| { |
| struct rf_signal_data *sig; |
| |
| if (subsys != SS_RF) |
| return -1; |
| |
| sig = signal_data; |
| |
| if (signal == S_RF_GRACE) |
| handle_grace(sig->net); |
| |
| return 0; |
| } |
| |
| static __attribute__((constructor)) void on_dso_load_grace(void) |
| { |
| osmo_signal_register_handler(SS_RF, handle_rf_signal, NULL); |
| } |