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/*
* ipaccess audio handling
*
* (C) 2009-2010 by Holger Hans Peter Freyther <zecke@selfish.org>
* (C) 2009-2010 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/bsc/bsc_msc_data.h>
#include <osmocom/bsc/osmo_bsc.h>
#include <osmocom/bsc/abis_rsl.h>
#include <osmocom/bsc/gsm_data.h>
#include <osmocom/bsc/debug.h>
#include <osmocom/bsc/signal.h>
#include <osmocom/gsm/gsm0808.h>
#include <osmocom/gsm/gsm0808_utils.h>
#include <osmocom/bsc/osmo_bsc_sigtran.h>
#include <osmocom/bsc/osmo_bsc_mgcp.h>
#include <arpa/inet.h>
static int handle_abisip_signal(unsigned int subsys, unsigned int signal,
void *handler_data, void *signal_data)
{
struct gsm_subscriber_connection *con;
struct gsm_lchan *lchan = signal_data;
int rc;
uint32_t rtp_ip;
if (subsys != SS_ABISIP)
return 0;
con = lchan->conn;
if (!con || !con->sccp_con)
return 0;
switch (signal) {
case S_ABISIP_CRCX_ACK:
/*
* TODO: handle handover here... then the audio should go to
* the old mgcp port..
*/
/* we can ask it to connect now */
LOGP(DMSC, LOGL_DEBUG, "Connecting BTS to port: %d conn: %d\n",
con->sccp_con->user_plane.rtp_port, lchan->abis_ip.conn_id);
/* If AoIP is in use, the rtp_ip, which has been communicated
* via the A interface as connect_ip */
if(con->sccp_con->user_plane.rtp_ip)
rtp_ip = con->sccp_con->user_plane.rtp_ip;
else
rtp_ip = ntohl(INADDR_ANY);
rc = rsl_ipacc_mdcx(lchan, rtp_ip,
con->sccp_con->user_plane.rtp_port,
lchan->abis_ip.rtp_payload2);
if (rc < 0) {
LOGP(DMSC, LOGL_ERROR, "Failed to send MDCX: %d\n", rc);
return rc;
}
break;
case S_ABISIP_MDCX_ACK:
if (con->ho_lchan) {
/* NOTE: When an ho_lchan exists, the MDCX is part of an
* handover operation (intra-bsc). This means we will not
* inform the MSC about the event, which means that no
* assignment complete message is transmitted, we just
* inform the logic that controls the MGW about the new
* connection info */
LOGP(DMSC, LOGL_INFO,"RTP connection handover initiated...\n");
mgcp_handover(con->sccp_con->user_plane.mgcp_ctx, con->ho_lchan);
} else if (is_ipaccess_bts(con->bts) && con->sccp_con->user_plane.rtp_ip) {
/* NOTE: This is only relevant on AoIP networks with
* IPA based base stations. See also osmo_bsc_api.c,
* function bsc_assign_compl() */
LOGP(DMSC, LOGL_INFO, "Tx MSC ASSIGN COMPL (POSTPONED)\n");
mgcp_ass_complete(con->sccp_con->user_plane.mgcp_ctx, lchan);
}
break;
}
return 0;
}
int osmo_bsc_audio_init(struct gsm_network *net)
{
osmo_signal_register_handler(SS_ABISIP, handle_abisip_signal, net);
return 0;
}
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