| /* SMS queue to continously attempt to deliver SMS */ |
| /* |
| * (C) 2010 by Holger Hans Peter Freyther <zecke@selfish.org> |
| * 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. |
| * |
| */ |
| |
| /** |
| * The difficulty of such a queue is to send a lot of SMS without |
| * overloading the paging subsystem and the database and other users |
| * of the MSC. To make the best use we would need to know the number |
| * of pending paging requests, then throttle the number of SMS we |
| * want to send and such. |
| * We will start with a very simple SMS Queue and then try to speed |
| * things up by collecting data from other parts of the system. |
| */ |
| |
| #include <openbsc/sms_queue.h> |
| #include <openbsc/chan_alloc.h> |
| #include <openbsc/db.h> |
| #include <openbsc/debug.h> |
| #include <openbsc/gsm_data.h> |
| #include <openbsc/gsm_04_11.h> |
| #include <openbsc/signal.h> |
| |
| #include <osmocore/talloc.h> |
| |
| |
| struct gsm_sms_queue { |
| struct gsm_network *network; |
| int max_pending; |
| int pending; |
| }; |
| |
| |
| int sms_queue_start(struct gsm_network *network, int max_pending) |
| { |
| struct gsm_sms_queue *sms = talloc_zero(network, struct gsm_sms_queue); |
| if (!sms) { |
| LOGP(DMSC, LOGL_ERROR, "Failed to create the SMS queue.\n"); |
| return -1; |
| } |
| |
| network->sms_queue = sms; |
| sms->network = network; |
| sms->max_pending = max_pending; |
| |
| return 0; |
| } |
| |
| static int sub_ready_for_sm(struct gsm_subscriber *subscr) |
| { |
| struct gsm_subscriber_connection *conn; |
| struct gsm_sms *sms; |
| |
| /* A subscriber has attached. Check if there are |
| * any pending SMS for him to be delivered */ |
| conn = connection_for_subscr(subscr); |
| if (!conn) |
| return -1; |
| sms = db_sms_get_unsent_for_subscr(subscr); |
| if (!sms) |
| return -1; |
| gsm411_send_sms(conn, sms); |
| return 0; |
| } |
| |
| static int sms_subscr_cb(unsigned int subsys, unsigned int signal, |
| void *handler_data, void *signal_data) |
| { |
| struct gsm_subscriber *subscr = signal_data; |
| |
| if (signal != S_SUBSCR_ATTACHED) |
| return 0; |
| |
| /* this is readyForSM */ |
| return sub_ready_for_sm(subscr); |
| } |
| |
| static __attribute__((constructor)) void on_dso_load_sms(void) |
| { |
| register_signal_handler(SS_SUBSCR, sms_subscr_cb, NULL); |
| } |