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/* GSM silent call feature */
/*
* (C) 2009 by Harald Welte <laforge@gnumonks.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.
*
*/
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <openbsc/msgb.h>
#include <openbsc/signal.h>
#include <openbsc/debug.h>
#include <openbsc/paging.h>
#include <openbsc/gsm_data.h>
#include <openbsc/gsm_subscriber.h>
#include <openbsc/abis_rsl.h>
#include <openbsc/chan_alloc.h>
static int paging_cb_silent(unsigned int hooknum, unsigned int event,
struct msgb *msg, void *_lchan, void *_data)
{
struct gsm_lchan *lchan = _lchan;
struct scall_signal_data sigdata;
int rc;
if (hooknum != GSM_HOOK_RR_PAGING)
return -EINVAL;
DEBUGP(DSMS, "paging_cb_silent: ");
sigdata.lchan = lchan;
sigdata.data = _data;
switch (event) {
case GSM_PAGING_SUCCEEDED:
DEBUGPC(DSMS, "success, using Timeslot %u on ARFCN %u\n",
lchan->ts->nr, lchan->ts->trx->arfcn);
/* increment lchan reference count */
dispatch_signal(SS_SCALL, S_SCALL_SUCCESS, &sigdata);
use_lchan(lchan);
break;
case GSM_PAGING_EXPIRED:
DEBUGP(DSMS, "expired\n");
dispatch_signal(SS_SCALL, S_SCALL_EXPIRED, &sigdata);
break;
default:
rc = -EINVAL;
break;
}
return rc;
}
int gsm_silent_call_start(struct gsm_subscriber *subscr, void *data)
{
int rc;
rc = paging_request(subscr->net, subscr, RSL_CHANNEED_TCH_F,
paging_cb_silent, data);
return rc;
}
int gsm_silent_call_stop(struct gsm_subscriber *subscr)
{
struct gsm_lchan *lchan;
lchan = lchan_for_subscr(subscr);
if (!lchan)
return -EINVAL;
/* FIXME: did we actually establish a silent call for this guy? */
put_lchan(lchan);
return 0;
}
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