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/* 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);
}
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