82 lines
2.7 KiB
C
82 lines
2.7 KiB
C
#pragma once
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#include <stdint.h>
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#include <stdbool.h>
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#include <osmocom/core/tdef.h>
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struct osmo_fsm_inst;
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struct osmo_sockaddr_str;
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struct osmo_mgcpc_ep;
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struct gsm_network;
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struct gsm_trans;
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struct rtp_stream;
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enum rtp_direction;
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extern struct osmo_tdef g_mgw_tdefs[];
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/* All sides of an MGW endpoint, connecting remote RTP peers via the MGW.
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*
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* BSC MGW PBX
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* CI CI
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* [MGW-endpoint]
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* [--rtp_stream--] [--rtp_stream--]
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* [----------------call_leg----------------]
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*
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*/
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struct call_leg {
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struct osmo_fsm_inst *fi;
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struct osmo_mgcpc_ep *mgw_endpoint;
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/* Array indexed by enum rtp_direction. */
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struct rtp_stream *rtp[2];
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/* Array indexed by enum rtp_direction. */
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enum mgcp_connection_mode crcx_conn_mode[2];
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uint32_t parent_event_rtp_addr_available;
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uint32_t parent_event_rtp_complete;
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uint32_t parent_event_rtp_released;
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/* For internal MNCC, if RTP addresses for endpoints become assigned by the MGW, implicitly notify the other
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* call leg's RTP_TO_CN side rtp_stream with rtp_stream_remote_addr_available(). */
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struct call_leg *local_bridge;
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/* Prevent events from deallocating for certain release code paths, to prevent use-after-free problems. */
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bool deallocating;
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};
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enum call_leg_event {
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CALL_LEG_EV_RTP_STREAM_ADDR_AVAILABLE,
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CALL_LEG_EV_RTP_STREAM_ESTABLISHED,
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CALL_LEG_EV_RTP_STREAM_GONE,
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CALL_LEG_EV_MGW_ENDPOINT_GONE,
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};
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void call_leg_init(struct gsm_network *net);
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struct call_leg *call_leg_alloc(struct osmo_fsm_inst *parent_fi,
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uint32_t parent_event_term,
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uint32_t parent_event_rtp_addr_available,
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uint32_t parent_event_rtp_complete,
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uint32_t parent_event_rtp_released);
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void call_leg_reparent(struct call_leg *cl,
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struct osmo_fsm_inst *parent_fi,
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uint32_t parent_event_term,
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uint32_t parent_event_rtp_addr_available,
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uint32_t parent_event_rtp_complete,
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uint32_t parent_event_rtp_released);
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int call_leg_local_bridge(struct call_leg *cl1, uint32_t call_id1, struct gsm_trans *trans1,
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struct call_leg *cl2, uint32_t call_id2, struct gsm_trans *trans2);
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int call_leg_ensure_rtp_alloc(struct call_leg *cl, enum rtp_direction dir, uint32_t call_id,
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struct gsm_trans *for_trans);
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int call_leg_ensure_ci(struct call_leg *cl, enum rtp_direction dir, uint32_t call_id, struct gsm_trans *for_trans,
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const enum mgcp_codecs *codec_if_known, const struct osmo_sockaddr_str *remote_port_if_known);
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struct osmo_sockaddr_str *call_leg_local_ip(struct call_leg *cl, enum rtp_direction dir);
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void call_leg_rtp_stream_gone(struct call_leg *cl, struct rtp_stream *rtps);
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void call_leg_release(struct call_leg *cl);
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