| /* GSM 08.08 like API for OpenBSC. The bridge from MSC to BSC */ |
| |
| /* (C) 2010 by Holger Hans Peter Freyther |
| * (C) 2010 by On Waves |
| * (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 <openbsc/bsc_api.h> |
| #include <openbsc/gsm_data.h> |
| #include <openbsc/signal.h> |
| #include <openbsc/abis_rsl.h> |
| |
| #include <osmocore/talloc.h> |
| |
| int bsc_api_init(struct gsm_network *network, struct bsc_api *api) |
| { |
| network->bsc_api = api; |
| return 0; |
| } |
| |
| int gsm0808_submit_dtap(struct gsm_subscriber_connection *conn, |
| struct msgb *msg, int link_id) |
| { |
| msg->lchan = conn->lchan; |
| msg->trx = msg->lchan->ts->trx; |
| return rsl_data_request(msg, link_id); |
| } |
| |
| /* dequeue messages to layer 4 */ |
| int bsc_upqueue(struct gsm_network *net) |
| { |
| struct gsm_mncc *mncc; |
| struct msgb *msg; |
| int work = 0; |
| |
| if (net) |
| while ((msg = msgb_dequeue(&net->upqueue))) { |
| mncc = (struct gsm_mncc *)msg->data; |
| if (net->mncc_recv) |
| net->mncc_recv(net, mncc->msg_type, mncc); |
| work = 1; /* work done */ |
| talloc_free(msg); |
| } |
| |
| return work; |
| } |
| |
| static int bsc_handle_lchan_signal(unsigned int subsys, unsigned int signal, |
| void *handler_data, void *signal_data) |
| { |
| struct bsc_api *bsc; |
| struct gsm_lchan *lchan; |
| |
| if (subsys != SS_LCHAN || signal != S_LCHAN_UNEXPECTED_RELEASE) |
| return 0; |
| |
| lchan = (struct gsm_lchan *)signal_data; |
| if (!lchan) |
| return 0; |
| |
| |
| bsc = lchan->ts->trx->bts->network->bsc_api; |
| if (!bsc || !bsc->clear_request) |
| return 0; |
| |
| bsc->clear_request(&lchan->conn, 0); |
| return 0; |
| } |
| |
| static __attribute__((constructor)) void on_dso_load_bsc(void) |
| { |
| register_signal_handler(SS_LCHAN, bsc_handle_lchan_signal, NULL); |
| } |