| /* 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_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; |
| bool patched_first_rtp_payload; /* FIXME: drop this, see OS#2459 */ |
| }; |
| |
| 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; |
| } |
| |
| int mgcp_msg_terminate_nul(struct msgb *msg); |