71 lines
2.2 KiB
C
71 lines
2.2 KiB
C
/* A Media Gateway Control Protocol Media Gateway: RFC 3435 */
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/*
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* (C) 2009 by Holger Hans Peter Freyther <zecke@selfish.org>
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* (C) 2009 by On-Waves
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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 General Public License as published by
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* the Free Software Foundation; either version 2 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 General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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*/
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#ifndef OPENBSC_MGCP_H
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#define OPENBSC_MGCP_H
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#include <osmocore/msgb.h>
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#define RTP_PORT_DEFAULT 4000
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extern unsigned int rtp_base_port;
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/**
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* Calculate the RTP audio port for the given multiplex
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* and the direction. This allows a semi static endpoint
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* to port calculation removing the need for the BSC
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* and the MediaGateway to communicate.
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*
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* Port usage explained:
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* base + (multiplex * 2) + 0 == local port to wait for network packets
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* base + (multiplex * 2) + 1 == local port for rtcp
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*
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* The above port will receive packets from the BTS that need
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* to be patched and forwarded to the network.
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* The above port will receive packets from the network that
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* need to be patched and forwarded to the BTS.
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*
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* We assume to have a static BTS IP address so we can differentiate
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* network and BTS.
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*
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*/
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static inline int rtp_calculate_port(int multiplex, int base)
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{
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return base + (multiplex * 2);
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}
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int mgcp_parse_config(const char *config_file, struct gsm_network *dummy_network);
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struct msgb *mgcp_handle_message(struct msgb *msg);
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struct msgb *mgcp_create_rsip(void);
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int mgcp_vty_init(void);
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/* endpoint managed */
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#define MGCP_ENDP_CRCX 1
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#define MGCP_ENDP_DLCX 2
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#define MGCP_ENDP_MDCX 3
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typedef int (*mgcp_change)(int endpoint, int state, int local_rtp, void *);
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void mgcp_set_change_cb(mgcp_change cb, void *data);
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#endif
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