136 lines
3.7 KiB
C
136 lines
3.7 KiB
C
/* The concept of a subscriber for the MSC, roughly HLR/VLR functionality */
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/* (C) 2008 by Harald Welte <laforge@gnumonks.org>
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* (C) 2009,2013 by Holger Hans Peter Freyther <zecke@selfish.org>
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*
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* All Rights Reserved
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#include <unistd.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <assert.h>
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#include <time.h>
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#include <stdbool.h>
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#include <osmocom/core/talloc.h>
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#include <osmocom/vty/vty.h>
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#include <openbsc/gsm_subscriber.h>
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#include <openbsc/gsm_04_08.h>
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#include <openbsc/debug.h>
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#include <openbsc/paging.h>
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#include <openbsc/signal.h>
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#include <openbsc/db.h>
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#include <openbsc/chan_alloc.h>
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#include <openbsc/vlr.h>
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int subscr_paging_dispatch(unsigned int hooknum, unsigned int event,
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struct msgb *msg, void *data, void *param)
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{
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struct subscr_request *request, *tmp;
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struct gsm_subscriber_connection *conn = data;
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struct vlr_subscr *vsub = param;
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struct paging_signal_data sig_data;
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OSMO_ASSERT(vsub && vsub->cs.is_paging);
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/* FIXME: implement stop paging in libmsc;
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* faking it for the unit tests to still work */
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msc_fake_paging_request_stop(vsub);
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/* Inform parts of the system we don't know */
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sig_data.vsub = vsub;
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sig_data.bts = conn ? conn->bts : NULL;
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sig_data.conn = conn;
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sig_data.paging_result = event;
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osmo_signal_dispatch(
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SS_PAGING,
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event == GSM_PAGING_SUCCEEDED ?
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S_PAGING_SUCCEEDED : S_PAGING_EXPIRED,
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&sig_data
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);
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llist_for_each_entry_safe(request, tmp, &vsub->cs.requests, entry) {
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llist_del(&request->entry);
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request->cbfn(hooknum, event, msg, data, request->param);
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talloc_free(request);
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}
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/* balanced with the moment we start paging */
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vsub->cs.is_paging = false;
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vlr_subscr_put(vsub);
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return 0;
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}
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struct subscr_request *subscr_request_conn(struct vlr_subscr *vsub, int channel_type, gsm_cbfn *cbfn,
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void *param)
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{
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int rc;
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struct subscr_request *request;
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/* Start paging.. we know it is async so we can do it before */
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if (!vsub->cs.is_paging) {
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LOGP(DMM, LOGL_DEBUG, "Subscriber %s not paged yet.\n",
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vlr_subscr_name(vsub));
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/* FIXME: implement paging in libmsc;
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* faking it for the unit tests to still work */
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rc = msc_fake_paging_request(vsub);
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if (rc <= 0) {
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LOGP(DMM, LOGL_ERROR, "Subscriber %s paging failed: %d\n",
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vlr_subscr_name(vsub), rc);
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return NULL;
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}
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/* reduced on the first paging callback */
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vlr_subscr_get(vsub);
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vsub->cs.is_paging = true;
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}
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/* TODO: Stop paging in case of memory allocation failure */
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request = talloc_zero(vsub, struct subscr_request);
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if (!request)
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return NULL;
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request->cbfn = cbfn;
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request->param = param;
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llist_add_tail(&request->entry, &vsub->cs.requests);
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return request;
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}
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void subscr_remove_request(struct subscr_request *request)
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{
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llist_del(&request->entry);
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talloc_free(request);
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}
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struct gsm_subscriber_connection *connection_for_subscr(struct vlr_subscr *vsub)
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{
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struct gsm_network *net = vsub->vlr->user_ctx;
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struct gsm_subscriber_connection *conn;
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llist_for_each_entry(conn, &net->subscr_conns, entry) {
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if (conn->vsub == vsub)
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return conn;
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}
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return NULL;
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}
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