| /* 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 <inttypes.h> |
| #include <osmocom/core/select.h> |
| #include <osmocom/mgcp/mgcp.h> |
| #include <osmocom/core/linuxlist.h> |
| #include <osmocom/core/counter.h> |
| #include <osmocom/core/rate_ctr.h> |
| |
| #define CI_UNUSED 0 |
| |
| struct mgcp_rtp_stream_state { |
| uint32_t ssrc; |
| uint16_t last_seq; |
| uint32_t last_timestamp; |
| struct rate_ctr *err_ts_ctr; |
| int32_t last_tsdelta; |
| uint32_t last_arrival_time; |
| }; |
| |
| struct mgcp_rtp_state { |
| /* has this state structure been initialized? */ |
| int initialized; |
| |
| struct { |
| /* are we patching the SSRC value? */ |
| int patch_ssrc; |
| /* original SSRC (to which we shall patch any different SSRC) */ |
| uint32_t orig_ssrc; |
| /* offset to apply on the sequence number */ |
| int seq_offset; |
| /* offset to apply on the timestamp number */ |
| int32_t timestamp_offset; |
| } patch; |
| |
| /* duration of a packet (FIXME: in which unit?) */ |
| uint32_t packet_duration; |
| |
| struct mgcp_rtp_stream_state in_stream; |
| struct mgcp_rtp_stream_state out_stream; |
| |
| /* jitter and packet loss calculation */ |
| struct { |
| int initialized; |
| uint16_t base_seq; |
| uint16_t max_seq; |
| uint32_t ssrc; |
| uint32_t jitter; |
| int32_t transit; |
| int cycles; |
| } stats; |
| |
| 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; |
| |
| bool param_present; |
| struct mgcp_codec_param param; |
| }; |
| |
| /* 'mgcp_rtp_end': basically a wrapper around the RTP+RTCP ports */ |
| struct mgcp_rtp_end { |
| /* local IP address of the RTP socket */ |
| struct in_addr addr; |
| |
| /* in network byte order */ |
| int rtp_port, rtcp_port; |
| |
| /* currently selected audio codec */ |
| struct mgcp_rtp_codec *codec; |
| |
| /* array with assigned audio codecs to choose from (SDP) */ |
| struct mgcp_rtp_codec codecs[MGCP_MAX_CODECS]; |
| |
| /* number of assigned audio codecs (SDP) */ |
| unsigned int codecs_assigned; |
| |
| /* per endpoint data */ |
| int frames_per_packet; |
| uint32_t packet_duration_ms; |
| int maximum_packet_time; /* -1: not set */ |
| char *fmtp_extra; |
| /* are we transmitting packets (1) or dropping (0) outbound packets */ |
| int output_enabled; |
| /* FIXME: This parameter can be set + printed, but is nowhere used! */ |
| int force_output_ptime; |
| |
| /* RTP patching */ |
| int force_constant_ssrc; /* -1: always, 0: don't, 1: once */ |
| /* should we perform align_rtp_timestamp_offset() (1) or not (0) */ |
| int force_aligned_timing; |
| bool rfc5993_hr_convert; |
| |
| /* Each end has a separate socket for RTP and RTCP */ |
| struct osmo_fd rtp; |
| struct osmo_fd rtcp; |
| |
| /* local UDP port number of the RTP socket; RTCP is +1 */ |
| int local_port; |
| }; |
| |
| struct mgcp_rtp_tap { |
| /* is this tap active (1) or not (0) */ |
| int enabled; |
| /* IP/port to which we're forwarding the tapped data */ |
| 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 */ |
| }; |
| |
| /* Specific rtp connection type (see struct mgcp_conn_rtp) */ |
| enum mgcp_conn_rtp_type { |
| MGCP_RTP_DEFAULT = 0, |
| MGCP_OSMUX_BSC, |
| MGCP_OSMUX_BSC_NAT, |
| }; |
| |
| #include <osmocom/mgcp/osmux.h> |
| |
| /* MGCP connection (RTP) */ |
| struct mgcp_conn_rtp { |
| |
| /* Backpointer to conn struct */ |
| struct mgcp_conn *conn; |
| |
| /* Specific connection type */ |
| enum mgcp_conn_rtp_type type; |
| |
| /* Port status */ |
| struct mgcp_rtp_end end; |
| |
| /* Sequence bits */ |
| struct mgcp_rtp_state state; |
| |
| /* taps for the rtp connection; one per direction */ |
| struct mgcp_rtp_tap tap_in; |
| struct mgcp_rtp_tap tap_out; |
| |
| /* Osmux states (optional) */ |
| struct { |
| /* Osmux state: disabled, activating, active */ |
| enum osmux_state state; |
| /* Is cid holding valid data? is it allocated from pool? */ |
| bool cid_allocated; |
| /* Allocated Osmux circuit ID for this conn */ |
| 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; |
| |
| struct rate_ctr_group *rate_ctr_group; |
| }; |
| |
| #include <osmocom/mgcp/mgcp_conn.h> |
| |
| /** |
| * Internal structure while parsing a request |
| */ |
| struct mgcp_parse_data { |
| struct mgcp_config *cfg; |
| struct mgcp_endpoint *endp; |
| char *trans; |
| char *save; |
| }; |
| |
| int mgcp_send(struct mgcp_endpoint *endp, int is_rtp, struct sockaddr_in *addr, |
| char *buf, int rc, struct mgcp_conn_rtp *conn_src, |
| struct mgcp_conn_rtp *conn_dst); |
| int mgcp_send_dummy(struct mgcp_endpoint *endp, struct mgcp_conn_rtp *conn); |
| int mgcp_dispatch_rtp_bridge_cb(int proto, struct sockaddr_in *addr, char *buf, |
| unsigned int buf_size, struct mgcp_conn *conn); |
| void mgcp_cleanup_rtp_bridge_cb(struct mgcp_endpoint *endp, struct mgcp_conn *conn); |
| int mgcp_dispatch_e1_bridge_cb(int proto, struct sockaddr_in *addr, char *buf, |
| unsigned int buf_size, struct mgcp_conn *conn); |
| void mgcp_cleanup_e1_bridge_cb(struct mgcp_endpoint *endp, struct mgcp_conn *conn); |
| int mgcp_bind_net_rtp_port(struct mgcp_endpoint *endp, int rtp_port, |
| struct mgcp_conn_rtp *conn); |
| void 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; |
| } |
| |
| char *get_lco_identifier(const char *options); |
| int check_local_cx_options(void *ctx, const char *options); |
| 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); |
| |
| /* 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_conn_rtp *conn_dst, |
| struct mgcp_conn_rtp *conn_src); |
| |
| void mgcp_get_net_downlink_format_default(struct mgcp_endpoint *endp, |
| const struct mgcp_rtp_codec **codec, |
| const char **fmtp_extra, |
| struct mgcp_conn_rtp *conn); |
| |
| /* 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); |
| |
| /* Was conn configured to handle Osmux? */ |
| static inline bool mgcp_conn_rtp_is_osmux(const struct mgcp_conn_rtp *conn) { |
| return conn->type == MGCP_OSMUX_BSC || conn->type == MGCP_OSMUX_BSC_NAT; |
| } |
| |
| 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) |
| |
| void mgcp_get_local_addr(char *addr, struct mgcp_conn_rtp *conn); |
| void mgcp_conn_watchdog_kick(struct mgcp_conn *conn); |