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/*
* Handle the connection to the MSC. This include ping/timeout/reconnect
* (C) 2008-2018 by Harald Welte <laforge@gnumonks.org>
* (C) 2009-2015 by Holger Hans Peter Freyther <zecke@selfish.org>
* (C) 2009-2015 by On-Waves
* 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 <osmocom/ctrl/control_cmd.h>
#include <osmocom/ctrl/control_if.h>
#include <osmocom/crypt/auth.h>
#include <osmocom/bsc/debug.h>
#include <osmocom/bsc/gsm_data.h>
#include <osmocom/bsc/ipaccess.h>
#include <osmocom/bsc/bsc_msc_data.h>
#include <osmocom/bsc/osmo_bsc_sigtran.h>
#include <osmocom/bsc/signal.h>
#include <osmocom/core/talloc.h>
#include <osmocom/core/socket.h>
#include <osmocom/gsm/gsm0808.h>
#include <osmocom/abis/ipa.h>
#include <osmocom/mgcp_client/mgcp_client.h>
#include <sys/socket.h>
#include <netinet/tcp.h>
#include <unistd.h>
int osmo_bsc_msc_init(struct bsc_msc_data *msc)
{
struct gsm_network *net = msc->network;
uint16_t mgw_port;
int rc;
/* FIXME: This is a leftover from the old architecture that used
* sccp-lite with osmocom specific authentication. Since we now
* changed to AoIP the connected status and the authentication
* status is managed differently. However osmo_bsc_filter.c still
* needs the flags to be set to one. See also: OS#3112 */
msc->is_authenticated = 1;
if (net->mgw.conf->remote_port == -1)
mgw_port = 2427;
else
mgw_port = net->mgw.conf->remote_port;
rc = osmo_sock_init2_ofd(&msc->mgcp_ipa.ofd, AF_INET, SOCK_DGRAM, IPPROTO_UDP,
msc->mgcp_ipa.local_addr, msc->mgcp_ipa.local_port,
net->mgw.conf->remote_addr, mgw_port,
OSMO_SOCK_F_BIND | OSMO_SOCK_F_CONNECT);
if (rc < 0) {
LOGP(DMSC, LOGL_ERROR, "msc %u: Could not create/connect/bind MGCP proxy socket: %d\n",
msc->nr, rc);
return rc;
}
return 0;
}
struct bsc_msc_data *osmo_msc_data_find(struct gsm_network *net, int nr)
{
struct bsc_msc_data *msc_data;
llist_for_each_entry(msc_data, &net->bsc_data->mscs, entry)
if (msc_data->nr == nr)
return msc_data;
return NULL;
}
struct bsc_msc_data *osmo_msc_data_alloc(struct gsm_network *net, int nr)
{
struct bsc_msc_data *msc_data;
/* check if there is already one */
msc_data = osmo_msc_data_find(net, nr);
if (msc_data)
return msc_data;
msc_data = talloc_zero(net, struct bsc_msc_data);
if (!msc_data)
return NULL;
llist_add_tail(&msc_data->entry, &net->bsc_data->mscs);
/* Init back pointer */
msc_data->network = net;
msc_data->core_plmn = (struct osmo_plmn_id){
.mcc = GSM_MCC_MNC_INVALID,
.mnc = GSM_MCC_MNC_INVALID,
};
msc_data->core_ci = -1;
msc_data->core_lac = -1;
msc_data->rtp_base = 4000;
msc_data->nr = nr;
msc_data->allow_emerg = 1;
msc_data->a.asp_proto = OSMO_SS7_ASP_PROT_M3UA;
/* Defaults for the audio setup */
msc_data->amr_conf.m5_90 = 1;
osmo_fd_setup(&msc_data->mgcp_ipa.ofd, -1, BSC_FD_READ, &bsc_sccplite_mgcp_proxy_cb, msc_data, 0);
msc_data->mgcp_ipa.local_addr = talloc_strdup(msc_data, "0.0.0.0");
msc_data->mgcp_ipa.local_port = 0; /* dynamic */
return msc_data;
}
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