146 lines
3.3 KiB
C
146 lines
3.3 KiB
C
/* MGCP Private Data */
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/*
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* (C) 2009-2010 by Holger Hans Peter Freyther <zecke@selfish.org>
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* (C) 2009-2010 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 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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#ifndef OPENBSC_MGCP_DATA_H
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#define OPENBSC_MGCP_DATA_H
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#include <osmocore/select.h>
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#define CI_UNUSED 0
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enum mgcp_connection_mode {
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MGCP_CONN_NONE = 0,
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MGCP_CONN_RECV_ONLY = 1,
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MGCP_CONN_SEND_ONLY = 2,
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MGCP_CONN_RECV_SEND = MGCP_CONN_RECV_ONLY | MGCP_CONN_SEND_ONLY,
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MGCP_CONN_LOOPBACK = 4,
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};
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struct mgcp_rtp_state {
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int initialized;
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int patch;
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uint32_t orig_ssrc;
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uint32_t ssrc;
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uint16_t seq_no;
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int lost_no;
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int seq_offset;
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uint32_t last_timestamp;
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int32_t timestamp_offset;
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};
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struct mgcp_rtp_end {
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/* statistics */
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unsigned int packets;
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struct in_addr addr;
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/* in network byte order */
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int rtp_port, rtcp_port;
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int payload_type;
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/*
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* Each end has a socket...
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*/
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struct bsc_fd rtp;
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struct bsc_fd rtcp;
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int local_port;
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int local_alloc;
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};
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enum {
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MGCP_TAP_BTS_IN,
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MGCP_TAP_BTS_OUT,
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MGCP_TAP_NET_IN,
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MGCP_TAP_NET_OUT,
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/* last element */
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MGCP_TAP_COUNT
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};
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struct mgcp_rtp_tap {
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int enabled;
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struct sockaddr_in forward;
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};
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struct mgcp_endpoint {
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int allocated;
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uint32_t ci;
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char *callid;
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char *local_options;
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int conn_mode;
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int orig_mode;
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/* backpointer */
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struct mgcp_config *cfg;
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/* port status for bts/net */
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struct mgcp_rtp_end bts_end;
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struct mgcp_rtp_end net_end;
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/*
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* For transcoding we will send from the local_port
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* of trans_bts and it will arrive at trans_net from
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* where we will forward it to the network.
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*/
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struct mgcp_rtp_end trans_bts;
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struct mgcp_rtp_end trans_net;
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int is_transcoded;
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/* sequence bits */
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struct mgcp_rtp_state net_state;
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struct mgcp_rtp_state bts_state;
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/* SSRC/seq/ts patching for loop */
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int allow_patch;
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/* tap for the endpoint */
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struct mgcp_rtp_tap taps[MGCP_TAP_COUNT];
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};
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#define ENDPOINT_NUMBER(endp) abs(endp - endp->cfg->endpoints)
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struct mgcp_msg_ptr {
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unsigned int start;
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unsigned int length;
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};
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int mgcp_analyze_header(struct mgcp_config *cfg, struct msgb *msg,
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struct mgcp_msg_ptr *ptr, int size,
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const char **transaction_id, struct mgcp_endpoint **endp);
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int mgcp_send_dummy(struct mgcp_endpoint *endp);
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int mgcp_bind_bts_rtp_port(struct mgcp_endpoint *endp, int rtp_port);
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int mgcp_bind_net_rtp_port(struct mgcp_endpoint *endp, int rtp_port);
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int mgcp_bind_trans_bts_rtp_port(struct mgcp_endpoint *enp, int rtp_port);
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int mgcp_bind_trans_net_rtp_port(struct mgcp_endpoint *enp, int rtp_port);
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int mgcp_free_rtp_port(struct mgcp_rtp_end *end);
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/* For transcoding we need to manage an in and an output that are connected */
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static inline int endp_back_channel(int endpoint)
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{
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return endpoint + 60;
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}
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#endif
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