217 lines
4.9 KiB
C
217 lines
4.9 KiB
C
/* MGCP Private Data */
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/*
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* (C) 2009-2012 by Holger Hans Peter Freyther <zecke@selfish.org>
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* (C) 2009-2012 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 <osmocom/core/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 | MGCP_CONN_RECV_SEND,
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};
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enum mgcp_trunk_type {
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MGCP_TRUNK_VIRTUAL,
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MGCP_TRUNK_E1,
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};
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struct mgcp_rtp_stream_state {
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uint32_t ssrc;
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uint16_t last_seq;
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uint32_t last_timestamp;
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uint32_t err_ts_counter;
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int32_t last_tsdelta;
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uint32_t last_arrival_time;
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};
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struct mgcp_rtp_state {
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int initialized;
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int patch_ssrc;
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uint32_t orig_ssrc;
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uint16_t base_seq;
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int seq_offset;
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int cycles;
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int32_t timestamp_offset;
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uint32_t packet_duration;
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uint32_t jitter;
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int32_t transit;
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struct mgcp_rtp_stream_state in_stream;
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struct mgcp_rtp_stream_state out_stream;
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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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unsigned int octets;
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unsigned int dropped_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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/* per endpoint data */
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int payload_type;
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uint32_t rate;
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uint32_t frame_duration_num;
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uint32_t frame_duration_den;
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int frames_per_packet;
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uint32_t packet_duration_ms;
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char *fmtp_extra;
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int output_enabled;
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/* RTP patching */
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int force_constant_ssrc; /* -1: always, 0: don't, 1: once */
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int force_aligned_timing;
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/*
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* Each end has a socket...
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*/
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struct osmo_fd rtp;
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struct osmo_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_lco {
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char *string;
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int pkt_period_min; /* time in ms */
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int pkt_period_max; /* time in ms */
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};
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enum mgcp_type {
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MGCP_RTP_DEFAULT = 0,
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MGCP_RTP_TRANSCODED,
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MGCP_OSMUX_BSC,
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MGCP_OSMUX_BSC_NAT,
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};
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#include <openbsc/osmux.h>
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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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struct mgcp_lco 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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struct mgcp_trunk_config *tcfg;
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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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enum mgcp_type type;
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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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/* fields for re-transmission */
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char *last_trans;
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char *last_response;
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/* tap for the endpoint */
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struct mgcp_rtp_tap taps[MGCP_TAP_COUNT];
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/* osmux is enabled/disabled */
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int osmux;
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/* osmux internal to unbatch messages for this endpoint */
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struct osmux_out_handle osmux_out;
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};
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#define ENDPOINT_NUMBER(endp) abs(endp - endp->tcfg->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_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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struct mgcp_trunk_config *mgcp_trunk_alloc(struct mgcp_config *cfg, int index);
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struct mgcp_trunk_config *mgcp_trunk_num(struct mgcp_config *cfg, int index);
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void mgcp_rtp_end_config(struct mgcp_endpoint *endp, int expect_ssrc_change,
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struct mgcp_rtp_end *rtp);
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uint32_t mgcp_rtp_packet_duration(struct mgcp_endpoint *endp,
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struct mgcp_rtp_end *rtp);
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void mgcp_state_calc_loss(struct mgcp_rtp_state *s, struct mgcp_rtp_end *,
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uint32_t *expected, int *loss);
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uint32_t mgcp_state_calc_jitter(struct mgcp_rtp_state *);
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enum {
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MGCP_DEST_NET = 0,
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MGCP_DEST_BTS,
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};
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#define MGCP_DUMMY_LOAD 0x23
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#endif
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