cellular-infrastructure
/
osmo-bsc
mirror of https://gerrit.osmocom.org/osmo-bsc
9
0
Fork 0
Code Issues Releases Wiki Activity
osmo-bsc/include/openbsc/mgcp_internal.h

343 lines
7.9 KiB
C
Raw Blame History

/* MGCP Private Data */
/*
* (C) 2009-2012 by Holger Hans Peter Freyther <zecke@selfish.org>
* (C) 2009-2012 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/>.
*
*/
#pragma once
#include <string.h>
#include <osmocom/core/select.h>
#define CI_UNUSED 0
enum mgcp_connection_mode {
MGCP_CONN_NONE = 0,
MGCP_CONN_RECV_ONLY = 1,
MGCP_CONN_SEND_ONLY = 2,
MGCP_CONN_RECV_SEND = MGCP_CONN_RECV_ONLY | MGCP_CONN_SEND_ONLY,
MGCP_CONN_LOOPBACK = 4 | MGCP_CONN_RECV_SEND,
};
enum mgcp_trunk_type {
MGCP_TRUNK_VIRTUAL,
MGCP_TRUNK_E1,
};
struct mgcp_rtp_stream_state {
uint32_t ssrc;
uint16_t last_seq;
uint32_t last_timestamp;
uint32_t err_ts_counter;
int32_t last_tsdelta;
uint32_t last_arrival_time;
};
struct mgcp_rtp_state {
int initialized;
int patch_ssrc;
uint32_t orig_ssrc;
int seq_offset;
int32_t timestamp_offset;
uint32_t packet_duration;
struct mgcp_rtp_stream_state in_stream;
struct mgcp_rtp_stream_state out_stream;
/* jitter and packet loss calculation */
int stats_initialized;
uint16_t stats_base_seq;
uint16_t stats_max_seq;
uint32_t stats_ssrc;
uint32_t stats_jitter;
int32_t stats_transit;
int stats_cycles;
};
struct mgcp_rtp_codec {
uint32_t rate;
int channels;
uint32_t frame_duration_num;
uint32_t frame_duration_den;
int payload_type;
char *audio_name;
char *subtype_name;
};
struct mgcp_rtp_end {
/* statistics */
unsigned int packets;
unsigned int octets;
unsigned int dropped_packets;
struct in_addr addr;
/* in network byte order */
int rtp_port, rtcp_port;
/* audio codec information */
struct mgcp_rtp_codec codec;
struct mgcp_rtp_codec alt_codec; /* TODO/XXX: make it generic */
/* per endpoint data */
int frames_per_packet;
uint32_t packet_duration_ms;
char *fmtp_extra;
int output_enabled;
int force_output_ptime;
/* RTP patching */
int force_constant_ssrc; /* -1: always, 0: don't, 1: once */
int force_aligned_timing;
void *rtp_process_data;
/*
* Each end has a socket...
*/
struct osmo_fd rtp;
struct osmo_fd rtcp;
int local_port;
int local_alloc;
};
enum {
MGCP_TAP_BTS_IN,
MGCP_TAP_BTS_OUT,
MGCP_TAP_NET_IN,
MGCP_TAP_NET_OUT,
/* last element */
MGCP_TAP_COUNT
};
struct mgcp_rtp_tap {
int enabled;
struct sockaddr_in forward;
};
struct mgcp_lco {
char *string;
char *codec;
int pkt_period_min; /* time in ms */
int pkt_period_max; /* time in ms */
};
enum mgcp_type {
MGCP_RTP_DEFAULT = 0,
MGCP_RTP_TRANSCODED,
MGCP_OSMUX_BSC,
MGCP_OSMUX_BSC_NAT,
};
#include <openbsc/osmux.h>
struct mgcp_endpoint {
int allocated;
uint32_t ci;
char *callid;
struct mgcp_lco local_options;
int conn_mode;
int orig_mode;
/* backpointer */
struct mgcp_config *cfg;
struct mgcp_trunk_config *tcfg;
/* port status for bts/net */
struct mgcp_rtp_end bts_end;
struct mgcp_rtp_end net_end;
/*
* For transcoding we will send from the local_port
* of trans_bts and it will arrive at trans_net from
* where we will forward it to the network.
*/
struct mgcp_rtp_end trans_bts;
struct mgcp_rtp_end trans_net;
enum mgcp_type type;
/* sequence bits */
struct mgcp_rtp_state net_state;
struct mgcp_rtp_state bts_state;
/* fields for re-transmission */
char *last_trans;
char *last_response;
/* tap for the endpoint */
struct mgcp_rtp_tap taps[MGCP_TAP_COUNT];
struct {
/* Osmux state: disabled, activating, active */
enum osmux_state state;
/* Allocated Osmux circuit ID for this endpoint */
int allocated_cid;
/* Used Osmux circuit ID for this endpoint */
uint8_t cid;
/* handle to batch messages */
struct osmux_in_handle *in;
/* handle to unbatch messages */
struct osmux_out_handle out;
/* statistics */
struct {
uint32_t chunks;
uint32_t octets;
} stats;
} osmux;
};
#define for_each_line(line, save) \
for (line = strline_r(NULL, &save); line;\
line = strline_r(NULL, &save))
static inline char *strline_r(char *str, char **saveptr)
{
char *result;
if (str)
*saveptr = str;
result = *saveptr;
if (*saveptr != NULL) {
*saveptr = strpbrk(*saveptr, "\r\n");
if (*saveptr != NULL) {
char *eos = *saveptr;
if ((*saveptr)[0] == '\r' && (*saveptr)[1] == '\n')
(*saveptr)++;
(*saveptr)++;
if ((*saveptr)[0] == '\0')
*saveptr = NULL;
*eos = '\0';
}
}
return result;
}
#define ENDPOINT_NUMBER(endp) abs((int)(endp - endp->tcfg->endpoints))
/**
* Internal structure while parsing a request
*/
struct mgcp_parse_data {
struct mgcp_config *cfg;
struct mgcp_endpoint *endp;
char *trans;
char *save;
int found;
};
int mgcp_send_dummy(struct mgcp_endpoint *endp);
int mgcp_bind_bts_rtp_port(struct mgcp_endpoint *endp, int rtp_port);
int mgcp_bind_net_rtp_port(struct mgcp_endpoint *endp, int rtp_port);
int mgcp_bind_trans_bts_rtp_port(struct mgcp_endpoint *enp, int rtp_port);
int mgcp_bind_trans_net_rtp_port(struct mgcp_endpoint *enp, int rtp_port);
int mgcp_free_rtp_port(struct mgcp_rtp_end *end);
/* For transcoding we need to manage an in and an output that are connected */
static inline int endp_back_channel(int endpoint)
{
return endpoint + 60;
}
struct mgcp_trunk_config *mgcp_trunk_alloc(struct mgcp_config *cfg, int index);
struct mgcp_trunk_config *mgcp_trunk_num(struct mgcp_config *cfg, int index);
void mgcp_rtp_end_config(struct mgcp_endpoint *endp, int expect_ssrc_change,
struct mgcp_rtp_end *rtp);
uint32_t mgcp_rtp_packet_duration(struct mgcp_endpoint *endp,
struct mgcp_rtp_end *rtp);
void mgcp_state_calc_loss(struct mgcp_rtp_state *s, struct mgcp_rtp_end *,
uint32_t *expected, int *loss);
uint32_t mgcp_state_calc_jitter(struct mgcp_rtp_state *);
/* payload processing default functions */
int mgcp_rtp_processing_default(struct mgcp_endpoint *endp, struct mgcp_rtp_end *dst_end,
char *data, int *len, int buf_size);
int mgcp_setup_rtp_processing_default(struct mgcp_endpoint *endp,
struct mgcp_rtp_end *dst_end,
struct mgcp_rtp_end *src_end);
void mgcp_get_net_downlink_format_default(struct mgcp_endpoint *endp,
int *payload_type,
const char**subtype_name,
const char**fmtp_extra);
/* internal RTP Annex A counting */
void mgcp_rtp_annex_count(struct mgcp_endpoint *endp, struct mgcp_rtp_state *state,
const uint16_t seq, const int32_t transit,
const uint32_t ssrc);
int mgcp_set_ip_tos(int fd, int tos);
enum {
MGCP_DEST_NET = 0,
MGCP_DEST_BTS,
};
#define MGCP_DUMMY_LOAD 0x23
/**
* SDP related information
*/
/* Assume audio frame length of 20ms */
#define DEFAULT_RTP_AUDIO_FRAME_DUR_NUM 20
#define DEFAULT_RTP_AUDIO_FRAME_DUR_DEN 1000
#define DEFAULT_RTP_AUDIO_PACKET_DURATION_MS 20
#define DEFAULT_RTP_AUDIO_DEFAULT_RATE 8000
#define DEFAULT_RTP_AUDIO_DEFAULT_CHANNELS 1
#define PTYPE_UNDEFINED (-1)
int mgcp_parse_sdp_data(struct mgcp_endpoint *endp, struct mgcp_rtp_end *rtp, struct mgcp_parse_data *p);
int mgcp_set_audio_info(void *ctx, struct mgcp_rtp_codec *codec,
int payload_type, const char *audio_name);
/**
* Internal network related
*/
static inline const char *mgcp_net_src_addr(struct mgcp_endpoint *endp)
{
if (endp->cfg->net_ports.bind_addr)
return endp->cfg->net_ports.bind_addr;
return endp->cfg->source_addr;
}
static inline const char *mgcp_bts_src_addr(struct mgcp_endpoint *endp)
{
if (endp->cfg->bts_ports.bind_addr)
return endp->cfg->bts_ports.bind_addr;
return endp->cfg->source_addr;
}
View Git Blame Copy Permalink