diff options
Diffstat (limited to 'src/libmsc/silent_call.c')
| -rw-r--r-- | src/libmsc/silent_call.c | 165 |
1 files changed, 0 insertions, 165 deletions
diff --git a/src/libmsc/silent_call.c b/src/libmsc/silent_call.c deleted file mode 100644 index 7af7a8055..000000000 --- a/src/libmsc/silent_call.c +++ /dev/null @@ -1,165 +0,0 @@ -/* 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 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 <stdlib.h> -#include <unistd.h> -#include <errno.h> - -#include <osmocom/core/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> -#include <openbsc/osmo_msc.h> - -/* paging of the requested subscriber has completed */ -static int paging_cb_silent(unsigned int hooknum, unsigned int event, - struct msgb *msg, void *_conn, void *_data) -{ - struct gsm_subscriber_connection *conn = _conn; - struct scall_signal_data sigdata; - int rc = 0; - - if (hooknum != GSM_HOOK_RR_PAGING) - return -EINVAL; - - DEBUGP(DLSMS, "paging_cb_silent: "); - - sigdata.conn = conn; - sigdata.data = _data; - - switch (event) { - case GSM_PAGING_SUCCEEDED: -#if BEFORE_MSCSPLIT - /* Re-enable this log output once we can obtain this information via - * A-interface, see OS#2391. */ - DEBUGPC(DLSMS, "success, using Timeslot %u on ARFCN %u\n", - conn->lchan->ts->nr, conn->lchan->ts->trx->arfcn); -#endif - conn->silent_call = 1; - msc_subscr_conn_get(conn); - /* increment lchan reference count */ - osmo_signal_dispatch(SS_SCALL, S_SCALL_SUCCESS, &sigdata); - break; - case GSM_PAGING_EXPIRED: - case GSM_PAGING_BUSY: - case GSM_PAGING_OOM: - DEBUGP(DLSMS, "expired\n"); - osmo_signal_dispatch(SS_SCALL, S_SCALL_EXPIRED, &sigdata); - break; - default: - rc = -EINVAL; - break; - } - - return rc; -} - -#if 0 -/* receive a layer 3 message from a silent call */ -int silent_call_rx(struct gsm_subscriber_connection *conn, struct msgb *msg) -{ - /* FIXME: do something like sending it through a UDP port */ - LOGP(DLSMS, LOGL_NOTICE, "Discarding L3 message from a silent call.\n"); - return 0; -} -#endif - -struct msg_match { - uint8_t pdisc; - uint8_t msg_type; -}; - -/* list of messages that are handled inside OpenBSC, even in a silent call */ -static const struct msg_match silent_call_accept[] = { - { GSM48_PDISC_MM, GSM48_MT_MM_LOC_UPD_REQUEST }, - { GSM48_PDISC_MM, GSM48_MT_MM_CM_SERV_REQ }, -}; - -#if 0 -/* decide if we need to reroute a message as part of a silent call */ -int silent_call_reroute(struct gsm_subscriber_connection *conn, struct msgb *msg) -{ - struct gsm48_hdr *gh = msgb_l3(msg); - uint8_t pdisc = gsm48_hdr_pdisc(gh); - uint8_t msg_type = gsm48_hdr_msg_type(gh); - int i; - - /* if we're not part of a silent call, never reroute */ - if (!conn->silent_call) - return 0; - - /* check if we are a special message that is handled in openbsc */ - for (i = 0; i < ARRAY_SIZE(silent_call_accept); i++) { - if (silent_call_accept[i].pdisc == pdisc && - silent_call_accept[i].msg_type == msg_type) - return 0; - } - - /* otherwise, reroute */ - LOGP(DLSMS, LOGL_INFO, "Rerouting L3 message from a silent call.\n"); - return 1; -} -#endif - - -/* initiate a silent call with a given subscriber */ -int gsm_silent_call_start(struct vlr_subscr *vsub, void *data, int type) -{ - struct subscr_request *req; - - /* FIXME the VTY command allows selecting a silent call channel type. - * This doesn't apply to the situation after MSCSPLIT with an - * A-interface. */ - req = subscr_request_conn(vsub, paging_cb_silent, data, - "establish silent call"); - return req != NULL; -} - -/* end a silent call with a given subscriber */ -int gsm_silent_call_stop(struct vlr_subscr *vsub) -{ - struct gsm_subscriber_connection *conn; - - conn = connection_for_subscr(vsub); - if (!conn) - return -EINVAL; - - /* did we actually establish a silent call for this guy? */ - if (!conn->silent_call) - return -EINVAL; - -#if BEFORE_MSCSPLIT - /* Re-enable this log output once we can obtain this information via - * A-interface, see OS#2391. */ - DEBUGPC(DLSMS, "Stopping silent call using Timeslot %u on ARFCN %u\n", - conn->lchan->ts->nr, conn->lchan->ts->trx->arfcn); -#endif - - conn->silent_call = 0; - msc_subscr_conn_put(conn); - - return 0; -} |