| /* 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; |
| } |