rtp_engine.c File Reference

Pluggable RTP Architecture. More...

#include "asterisk.h"
#include <math.h>
#include <sched.h>
#include <sys/time.h>
#include <time.h>
#include "asterisk/_private.h"
#include "asterisk/astobj2.h"
#include "asterisk/channel.h"
#include "asterisk/codec.h"
#include "asterisk/format.h"
#include "asterisk/format_cache.h"
#include "asterisk/format_cap.h"
#include "asterisk/json.h"
#include "asterisk/linkedlists.h"
#include "asterisk/lock.h"
#include "asterisk/logger.h"
#include "asterisk/manager.h"
#include "asterisk/module.h"
#include "asterisk/netsock2.h"
#include "asterisk/options.h"
#include "asterisk/pbx.h"
#include "asterisk/res_srtp.h"
#include "asterisk/rtp_engine.h"
#include "asterisk/stasis.h"
#include "asterisk/stasis_channels.h"
#include "asterisk/strings.h"
#include "asterisk/translate.h"
#include "asterisk/utils.h"
#include "asterisk/vector.h"

Include dependency graph for rtp_engine.c:

Go to the source code of this file.

Data Structures
struct	ast_rtp_instance
struct	ast_rtp_mime_type
struct	engines
struct	glues
struct	rtcp_message_payload
struct	rtp_extmap

Macros
#define	MAX_RTP_MIME_TYPES   128
#define	SET_AST_JSON_OBJ(target, name, obj)
	Set given json object into target with name. More...

Functions
static void	add_static_payload (int payload, struct ast_format *format, int rtp_code)
uintmax_t	ast_debug_category_dtls_id (void)
uintmax_t	ast_debug_category_dtls_packet_id (void)
uintmax_t	ast_debug_category_ice_id (void)
uintmax_t	ast_debug_category_rtcp_id (void)
uintmax_t	ast_debug_category_rtcp_packet_id (void)
uintmax_t	ast_debug_category_rtp_id (void)
uintmax_t	ast_debug_category_rtp_packet_id (void)
int	ast_rtp_codecs_find_payload_code (struct ast_rtp_codecs *codecs, int payload)
	Search for the tx payload type in the ast_rtp_codecs structure. More...
unsigned int	ast_rtp_codecs_get_framing (struct ast_rtp_codecs *codecs)
	Get the framing used for a set of codecs. More...
struct ast_rtp_payload_type *	ast_rtp_codecs_get_payload (struct ast_rtp_codecs *codecs, int payload)
	Retrieve rx payload mapped information by payload type. More...
struct ast_format *	ast_rtp_codecs_get_payload_format (struct ast_rtp_codecs *codecs, int payload)
	Retrieve the actual ast_format stored on the codecs structure for a specific tx payload type. More...
enum ast_media_type	ast_rtp_codecs_get_stream_type (struct ast_rtp_codecs *codecs)
	Determine the type of RTP stream media from the codecs mapped. More...
int	ast_rtp_codecs_payload_code (struct ast_rtp_codecs *codecs, int asterisk_format, struct ast_format *format, int code)
	Retrieve a rx mapped payload type based on whether it is an Asterisk format and the code. More...
int	ast_rtp_codecs_payload_code_tx (struct ast_rtp_codecs *codecs, int asterisk_format, const struct ast_format *format, int code)
	Retrieve a tx mapped payload type based on whether it is an Asterisk format and the code. More...
void	ast_rtp_codecs_payload_formats (struct ast_rtp_codecs *codecs, struct ast_format_cap *astformats, int *nonastformats)
	Retrieve all formats that were found. More...
int	ast_rtp_codecs_payload_replace_format (struct ast_rtp_codecs *codecs, int payload, struct ast_format *format)
	Update the format associated with a tx payload type in a codecs structure. More...
int	ast_rtp_codecs_payload_set_rx (struct ast_rtp_codecs *codecs, int code, struct ast_format *format)
	Set a payload code for use with a specific Asterisk format. More...
void	ast_rtp_codecs_payloads_clear (struct ast_rtp_codecs *codecs, struct ast_rtp_instance *instance)
	Clear rx and tx payload mapping information from an RTP instance. More...
void	ast_rtp_codecs_payloads_copy (struct ast_rtp_codecs *src, struct ast_rtp_codecs *dest, struct ast_rtp_instance *instance)
	Copy payload information from one RTP instance to another. More...
void	ast_rtp_codecs_payloads_destroy (struct ast_rtp_codecs *codecs)
	Destroy the contents of an RTP codecs structure (but not the structure itself) More...
int	ast_rtp_codecs_payloads_initialize (struct ast_rtp_codecs *codecs)
	Initialize an RTP codecs structure. More...
void	ast_rtp_codecs_payloads_set_m_type (struct ast_rtp_codecs *codecs, struct ast_rtp_instance *instance, int payload)
	Record tx payload type information that was seen in an m= SDP line. More...
int	ast_rtp_codecs_payloads_set_rtpmap_type (struct ast_rtp_codecs *codecs, struct ast_rtp_instance *instance, int payload, char *mimetype, char *mimesubtype, enum ast_rtp_options options)
	Record tx payload type information that was seen in an a=rtpmap: SDP line. More...
int	ast_rtp_codecs_payloads_set_rtpmap_type_rate (struct ast_rtp_codecs *codecs, struct ast_rtp_instance *instance, int pt, char *mimetype, char *mimesubtype, enum ast_rtp_options options, unsigned int sample_rate)
	Set tx payload type to a known MIME media type for a codec with a specific sample rate. More...
void	ast_rtp_codecs_payloads_unset (struct ast_rtp_codecs *codecs, struct ast_rtp_instance *instance, int payload)
	Remove tx payload type mapped information. More...
void	ast_rtp_codecs_payloads_xover (struct ast_rtp_codecs *src, struct ast_rtp_codecs *dest, struct ast_rtp_instance *instance)
	Crossover copy the tx payload mapping of src to the rx payload mapping of dest. More...
void	ast_rtp_codecs_set_framing (struct ast_rtp_codecs *codecs, unsigned int framing)
	Set the framing used for a set of codecs. More...
struct ast_json *	ast_rtp_convert_stats_json (const struct ast_rtp_instance_stats *stats)
	Convert given stat instance into json format. More...
void	ast_rtp_dtls_cfg_copy (const struct ast_rtp_dtls_cfg *src_cfg, struct ast_rtp_dtls_cfg *dst_cfg)
	Copy contents of a DTLS configuration structure. More...
void	ast_rtp_dtls_cfg_free (struct ast_rtp_dtls_cfg *dtls_cfg)
	Free contents of a DTLS configuration structure. More...
int	ast_rtp_dtls_cfg_parse (struct ast_rtp_dtls_cfg *dtls_cfg, const char *name, const char *value)
	Parse DTLS related configuration options. More...
int	ast_rtp_dtls_cfg_validate (struct ast_rtp_dtls_cfg *dtls_cfg)
	Validates DTLS related configuration options. More...
struct ast_rtp_payload_type *	ast_rtp_engine_alloc_payload_type (void)
	Allocation routine for ast_rtp_payload_type. More...
int	ast_rtp_engine_init (void)
	initializes the rtp engine arrays More...
int	ast_rtp_engine_load_format (struct ast_format *format)
	Custom formats declared in codecs.conf at startup must be communicated to the rtp_engine so their mime type can payload number can be initialized. More...
int	ast_rtp_engine_register2 (struct ast_rtp_engine *engine, struct ast_module *module)
	Register an RTP engine. More...
int	ast_rtp_engine_register_srtp (struct ast_srtp_res *srtp_res, struct ast_srtp_policy_res *policy_res)
int	ast_rtp_engine_srtp_is_registered (void)
int	ast_rtp_engine_unload_format (struct ast_format *format)
	Formats requiring the use of a format attribute interface must have that interface registered in order for the rtp engine to handle it correctly. If an attribute interface is unloaded, this function must be called to notify the rtp_engine. More...
int	ast_rtp_engine_unregister (struct ast_rtp_engine *engine)
	Unregister an RTP engine. More...
void	ast_rtp_engine_unregister_srtp (void)
int	ast_rtp_get_rate (const struct ast_format *format)
	Retrieve the sample rate of a format according to RTP specifications. More...
int	ast_rtp_glue_register2 (struct ast_rtp_glue *glue, struct ast_module *module)
	Register RTP glue. More...
int	ast_rtp_glue_unregister (struct ast_rtp_glue *glue)
	Unregister RTP glue. More...
int	ast_rtp_instance_activate (struct ast_rtp_instance *instance)
	Indicate to the RTP engine that packets are now expected to be sent/received on the RTP instance. More...
int	ast_rtp_instance_add_srtp_policy (struct ast_rtp_instance *instance, struct ast_srtp_policy *remote_policy, struct ast_srtp_policy *local_policy, int rtcp)
	Add or replace the SRTP policies for the given RTP instance. More...
void	ast_rtp_instance_available_formats (struct ast_rtp_instance *instance, struct ast_format_cap *to_endpoint, struct ast_format_cap *to_asterisk, struct ast_format_cap *result)
	Request the formats that can be transcoded. More...
int	ast_rtp_instance_bundle (struct ast_rtp_instance *child, struct ast_rtp_instance *parent)
	Request that an RTP instance be bundled with another. More...
void	ast_rtp_instance_change_source (struct ast_rtp_instance *instance)
	Indicate a new source of audio has dropped in and the ssrc should change. More...
int	ast_rtp_instance_destroy (struct ast_rtp_instance *instance)
	Destroy an RTP instance. More...
void	ast_rtp_instance_drop_packets (struct ast_rtp_instance *instance, int num)
	Set the number of packets to drop on RTP read. More...
int	ast_rtp_instance_dtmf_begin (struct ast_rtp_instance *instance, char digit)
	Begin sending a DTMF digit. More...
int	ast_rtp_instance_dtmf_end (struct ast_rtp_instance *instance, char digit)
	Stop sending a DTMF digit. More...
int	ast_rtp_instance_dtmf_end_with_duration (struct ast_rtp_instance *instance, char digit, unsigned int duration)
enum ast_rtp_dtmf_mode	ast_rtp_instance_dtmf_mode_get (struct ast_rtp_instance *instance)
	Get the DTMF mode of an RTP instance. More...
int	ast_rtp_instance_dtmf_mode_set (struct ast_rtp_instance *instance, enum ast_rtp_dtmf_mode dtmf_mode)
	Set the DTMF mode that should be used. More...
int	ast_rtp_instance_early_bridge (struct ast_channel *c0, struct ast_channel *c1)
	Early bridge two channels that use RTP instances. More...
void	ast_rtp_instance_early_bridge_make_compatible (struct ast_channel *c_dst, struct ast_channel *c_src)
	Make two channels compatible for early bridging. More...
void	ast_rtp_instance_extmap_clear (struct ast_rtp_instance *instance)
	Clear negotiated RTP extension information. More...
size_t	ast_rtp_instance_extmap_count (struct ast_rtp_instance *instance)
	Get the number of known unique identifiers. More...
int	ast_rtp_instance_extmap_enable (struct ast_rtp_instance *instance, int id, enum ast_rtp_extension extension, enum ast_rtp_extension_direction direction)
	Enable support for an RTP extension on an instance. More...
enum ast_rtp_extension_direction	ast_rtp_instance_extmap_get_direction (struct ast_rtp_instance *instance, int id)
	Retrieve the negotiated direction for an RTP extension id. More...
enum ast_rtp_extension	ast_rtp_instance_extmap_get_extension (struct ast_rtp_instance *instance, int id)
	Retrieve the extension for an RTP extension id. More...
int	ast_rtp_instance_extmap_get_id (struct ast_rtp_instance *instance, enum ast_rtp_extension extension)
	Retrieve the id for an RTP extension. More...
const char *	ast_rtp_instance_extmap_get_uri (struct ast_rtp_instance *instance, int id)
	Retrieve the URI for an RTP extension id. More...
int	ast_rtp_instance_extmap_negotiate (struct ast_rtp_instance *instance, int id, enum ast_rtp_extension_direction direction, const char *uri, const char *attributes)
	Negotiate received RTP extension information. More...
int	ast_rtp_instance_fd (struct ast_rtp_instance *instance, int rtcp)
	Get the file descriptor for an RTP session (or RTCP) More...
struct ast_rtp_glue *	ast_rtp_instance_get_active_glue (struct ast_rtp_instance *instance)
	Get the RTP glue in use on an RTP instance. More...
int	ast_rtp_instance_get_and_cmp_local_address (struct ast_rtp_instance *instance, struct ast_sockaddr *address)
	Get the address of the local endpoint that we are sending RTP to, comparing its address to another. More...
int	ast_rtp_instance_get_and_cmp_requested_target_address (struct ast_rtp_instance *instance, struct ast_sockaddr *address)
	Get the requested target address of the remote endpoint and compare it to the given address. More...
struct ast_rtp_instance *	ast_rtp_instance_get_bridged (struct ast_rtp_instance *instance)
	Get the other RTP instance that an instance is bridged to. More...
const char *	ast_rtp_instance_get_channel_id (struct ast_rtp_instance *instance)
	Get the unique ID of the channel that owns this RTP instance. More...
const char *	ast_rtp_instance_get_cname (struct ast_rtp_instance *rtp)
	Retrieve the CNAME used in RTCP SDES items. More...
struct ast_rtp_codecs *	ast_rtp_instance_get_codecs (struct ast_rtp_instance *instance)
	Get the codecs structure of an RTP instance. More...
void *	ast_rtp_instance_get_data (struct ast_rtp_instance *instance)
	Get the data portion of an RTP instance. More...
struct ast_rtp_engine_dtls *	ast_rtp_instance_get_dtls (struct ast_rtp_instance *instance)
	Obtain a pointer to the DTLS support present on an RTP instance. More...
struct ast_rtp_engine *	ast_rtp_instance_get_engine (struct ast_rtp_instance *instance)
	Get the RTP engine in use on an RTP instance. More...
void *	ast_rtp_instance_get_extended_prop (struct ast_rtp_instance *instance, int property)
	Get the value of an RTP instance extended property. More...
struct ast_rtp_glue *	ast_rtp_instance_get_glue (const char *type)
	Get the RTP glue that binds a channel to the RTP engine. More...
int	ast_rtp_instance_get_hold_timeout (struct ast_rtp_instance *instance)
	Get the RTP timeout value for when an RTP instance is on hold. More...
struct ast_rtp_engine_ice *	ast_rtp_instance_get_ice (struct ast_rtp_instance *instance)
	Obtain a pointer to the ICE support present on an RTP instance. More...
void	ast_rtp_instance_get_incoming_source_address (struct ast_rtp_instance *instance, struct ast_sockaddr *address)
	Get the incoming source address of the remote endpoint. More...
int	ast_rtp_instance_get_keepalive (struct ast_rtp_instance *instance)
	Get the RTP keepalive interval. More...
time_t	ast_rtp_instance_get_last_rx (const struct ast_rtp_instance *rtp)
time_t	ast_rtp_instance_get_last_tx (const struct ast_rtp_instance *rtp)
	Get the last RTP transmission time. More...
void	ast_rtp_instance_get_local_address (struct ast_rtp_instance *instance, struct ast_sockaddr *address)
	Get the local address that we are expecting RTP on. More...
int	ast_rtp_instance_get_prop (struct ast_rtp_instance *instance, enum ast_rtp_property property)
	Get the value of an RTP instance property. More...
char *	ast_rtp_instance_get_quality (struct ast_rtp_instance *instance, enum ast_rtp_instance_stat_field field, char *buf, size_t size)
	Retrieve quality statistics about an RTP instance. More...
size_t	ast_rtp_instance_get_recv_buffer_count (struct ast_rtp_instance *instance)
	Get the current size of the receive buffer. More...
size_t	ast_rtp_instance_get_recv_buffer_max (struct ast_rtp_instance *instance)
	Get the maximum size of the receive buffer. More...
void	ast_rtp_instance_get_requested_target_address (struct ast_rtp_instance *instance, struct ast_sockaddr *address)
	Get the requested target address of the remote endpoint. More...
int	ast_rtp_instance_get_sdes_received (struct ast_rtp_instance *instance)
	Get the value of sdes_received on the test engine. More...
size_t	ast_rtp_instance_get_send_buffer_count (struct ast_rtp_instance *instance)
	Get the current size of the send buffer. More...
struct ast_srtp *	ast_rtp_instance_get_srtp (struct ast_rtp_instance *instance, int rtcp)
	Obtain the SRTP instance associated with an RTP instance. More...
unsigned int	ast_rtp_instance_get_ssrc (struct ast_rtp_instance *rtp)
	Retrieve the local SSRC value that we will be using. More...
int	ast_rtp_instance_get_stats (struct ast_rtp_instance *instance, struct ast_rtp_instance_stats *stats, enum ast_rtp_instance_stat stat)
	Retrieve statistics about an RTP instance. More...
struct ast_json *	ast_rtp_instance_get_stats_all_json (struct ast_rtp_instance *instance)
	Retrieve statistics about an RTP instance in json format. More...
struct ast_rtp_engine_test *	ast_rtp_instance_get_test (struct ast_rtp_instance *instance)
	Obtain a pointer to the test callbacks on an RTP instance. More...
int	ast_rtp_instance_get_timeout (struct ast_rtp_instance *instance)
	Get the RTP timeout value. More...
int	ast_rtp_instance_make_compatible (struct ast_channel *chan, struct ast_rtp_instance *instance, struct ast_channel *peer)
	Request that the underlying RTP engine make two RTP instances compatible with eachother. More...
struct ast_rtp_instance *	ast_rtp_instance_new (const char *engine_name, struct ast_sched_context *sched, const struct ast_sockaddr *sa, void *data)
	Create a new RTP instance. More...
void	ast_rtp_instance_queue_report (struct ast_rtp_instance *instance)
	Sends a SR/RR report the next time RTP would be sent. More...
struct ast_frame *	ast_rtp_instance_read (struct ast_rtp_instance *instance, int rtcp)
	Receive a frame over RTP. More...
void	ast_rtp_instance_reset_test_engine (struct ast_rtp_instance *instance)
	Resets all the fields to default values for the test engine. More...
int	ast_rtp_instance_sendcng (struct ast_rtp_instance *instance, int level)
	Send a comfort noise packet to the RTP instance. More...
void	ast_rtp_instance_set_bridged (struct ast_rtp_instance *instance, struct ast_rtp_instance *bridged)
	Set the other RTP instance that an instance is bridged to. More...
void	ast_rtp_instance_set_channel_id (struct ast_rtp_instance *instance, const char *uniqueid)
	Set the channel that owns this RTP instance. More...
void	ast_rtp_instance_set_data (struct ast_rtp_instance *instance, void *data)
	Set the data portion of an RTP instance. More...
void	ast_rtp_instance_set_extended_prop (struct ast_rtp_instance *instance, int property, void *value)
	Set the value of an RTP instance extended property. More...
void	ast_rtp_instance_set_hold_timeout (struct ast_rtp_instance *instance, int timeout)
	Set the RTP timeout value for when the instance is on hold. More...
int	ast_rtp_instance_set_incoming_source_address (struct ast_rtp_instance *instance, const struct ast_sockaddr *address)
	Set the incoming source address of the remote endpoint that we are sending RTP to. More...
void	ast_rtp_instance_set_keepalive (struct ast_rtp_instance *instance, int interval)
	Set the RTP keepalive interval. More...
void	ast_rtp_instance_set_last_rx (struct ast_rtp_instance *rtp, time_t time)
	Set the last RTP reception time. More...
void	ast_rtp_instance_set_last_tx (struct ast_rtp_instance *rtp, time_t time)
	Set the last RTP transmission time. More...
int	ast_rtp_instance_set_local_address (struct ast_rtp_instance *instance, const struct ast_sockaddr *address)
	Set the address that we are expecting to receive RTP on. More...
void	ast_rtp_instance_set_prop (struct ast_rtp_instance *instance, enum ast_rtp_property property, int value)
	Set the value of an RTP instance property. More...
int	ast_rtp_instance_set_qos (struct ast_rtp_instance *instance, int tos, int cos, const char *desc)
	Set QoS parameters on an RTP session. More...
int	ast_rtp_instance_set_read_format (struct ast_rtp_instance *instance, struct ast_format *format)
	Request that the underlying RTP engine provide audio frames in a specific format. More...
void	ast_rtp_instance_set_remote_ssrc (struct ast_rtp_instance *rtp, unsigned int ssrc)
	Set the remote SSRC for an RTP instance. More...
int	ast_rtp_instance_set_requested_target_address (struct ast_rtp_instance *instance, const struct ast_sockaddr *address)
	Set the requested target address of the remote endpoint. More...
void	ast_rtp_instance_set_schedid (struct ast_rtp_instance *instance, int id)
	Set the schedid for RTCP. More...
void	ast_rtp_instance_set_stats_vars (struct ast_channel *chan, struct ast_rtp_instance *instance)
	Set standard statistics from an RTP instance on a channel. More...
void	ast_rtp_instance_set_stream_num (struct ast_rtp_instance *rtp, int stream_num)
	Set the stream number for an RTP instance. More...
void	ast_rtp_instance_set_timeout (struct ast_rtp_instance *instance, int timeout)
	Set the RTP timeout value. More...
int	ast_rtp_instance_set_write_format (struct ast_rtp_instance *instance, struct ast_format *format)
	Tell underlying RTP engine that audio frames will be provided in a specific format. More...
void	ast_rtp_instance_stop (struct ast_rtp_instance *instance)
	Stop an RTP instance. More...
void	ast_rtp_instance_stun_request (struct ast_rtp_instance *instance, struct ast_sockaddr *suggestion, const char *username)
	Request that the underlying RTP engine send a STUN BIND request. More...
void	ast_rtp_instance_update_source (struct ast_rtp_instance *instance)
	Indicate that the RTP marker bit should be set on an RTP stream. More...
int	ast_rtp_instance_write (struct ast_rtp_instance *instance, struct ast_frame *frame)
	Send a frame out over RTP. More...
char *	ast_rtp_lookup_mime_multiple2 (struct ast_str *buf, struct ast_format_cap *ast_format_capability, int rtp_capability, const int asterisk_format, enum ast_rtp_options options)
	Convert formats into a string and put them into a buffer. More...
const char *	ast_rtp_lookup_mime_subtype2 (const int asterisk_format, const struct ast_format *format, int code, enum ast_rtp_options options)
	Retrieve mime subtype information on a payload. More...
unsigned int	ast_rtp_lookup_sample_rate2 (int asterisk_format, const struct ast_format *format, int code)
	Get the sample rate associated with known RTP payload types. More...
void	ast_rtp_publish_rtcp_message (struct ast_rtp_instance *rtp, struct stasis_message_type *message_type, struct ast_rtp_rtcp_report *report, struct ast_json *blob)
	Publish an RTCP message to Stasis Message Bus API. More...
int	ast_rtp_red_buffer (struct ast_rtp_instance *instance, struct ast_frame *frame)
	Buffer a frame in an RTP instance for RED. More...
int	ast_rtp_red_init (struct ast_rtp_instance *instance, int buffer_time, int *payloads, int generations)
	Initialize RED support on an RTP instance. More...
struct ast_rtp_rtcp_report *	ast_rtp_rtcp_report_alloc (unsigned int report_blocks)
	Allocate an ao2 ref counted instance of ast_rtp_rtcp_report. More...
struct stasis_topic *	ast_rtp_topic (void)
	Stasis Message Bus API topic for RTP and RTCP related messages More...
static int	find_static_payload_type (int asterisk_format, const struct ast_format *format, int code)
static int	find_unused_payload (const struct ast_rtp_codecs *codecs)
static int	find_unused_payload_in_range (const struct ast_rtp_codecs *codecs, int start, int end, struct ast_rtp_payload_type *ignore[])
static void	instance_destructor (void *obj)
static void	payload_mapping_rx_clear_primary (struct ast_rtp_codecs *codecs, struct ast_rtp_payload_type *to_match)
static int	payload_mapping_tx_is_present (const struct ast_rtp_codecs *codecs, const struct ast_rtp_payload_type *to_match)
static void	rtcp_message_payload_dtor (void *obj)
static struct ast_manager_event_blob *	rtcp_report_to_ami (struct stasis_message *msg)
static struct ast_json *	rtcp_report_to_json (struct stasis_message *msg, const struct stasis_message_sanitizer *sanitize)
static int	rtp_codecs_assign_payload_code_rx (struct ast_rtp_codecs *codecs, int asterisk_format, struct ast_format *format, int code, int explicit)
static int	rtp_codecs_find_non_primary_dynamic_rx (struct ast_rtp_codecs *codecs)
static void	rtp_codecs_payload_replace_rx (struct ast_rtp_codecs *codecs, int payload, struct ast_rtp_payload_type *new_type)
static void	rtp_codecs_payloads_copy_rx (struct ast_rtp_codecs *src, struct ast_rtp_codecs *dest, struct ast_rtp_instance *instance)
static void	rtp_codecs_payloads_copy_tx (struct ast_rtp_codecs *src, struct ast_rtp_codecs *dest, struct ast_rtp_instance *instance)
static int	rtp_dtls_wrap_active (struct ast_rtp_instance *instance)
static enum ast_rtp_dtls_connection	rtp_dtls_wrap_get_connection (struct ast_rtp_instance *instance)
static const char *	rtp_dtls_wrap_get_fingerprint (struct ast_rtp_instance *instance)
static enum ast_rtp_dtls_hash	rtp_dtls_wrap_get_fingerprint_hash (struct ast_rtp_instance *instance)
static enum ast_rtp_dtls_setup	rtp_dtls_wrap_get_setup (struct ast_rtp_instance *instance)
static void	rtp_dtls_wrap_reset (struct ast_rtp_instance *instance)
static int	rtp_dtls_wrap_set_configuration (struct ast_rtp_instance *instance, const struct ast_rtp_dtls_cfg *dtls_cfg)
static void	rtp_dtls_wrap_set_fingerprint (struct ast_rtp_instance *instance, enum ast_rtp_dtls_hash hash, const char *fingerprint)
static void	rtp_dtls_wrap_set_setup (struct ast_rtp_instance *instance, enum ast_rtp_dtls_setup setup)
static void	rtp_dtls_wrap_stop (struct ast_rtp_instance *instance)
static void	rtp_engine_mime_type_cleanup (int i)
static void	rtp_engine_shutdown (void)
static enum ast_rtp_extension_direction	rtp_extmap_negotiate_direction (enum ast_rtp_extension_direction ours, enum ast_rtp_extension_direction theirs)
	Helper function which negotiates two RTP extension directions to get our current direction. More...
static void	rtp_ice_wrap_add_remote_candidate (struct ast_rtp_instance *instance, const struct ast_rtp_engine_ice_candidate *candidate)
static void	rtp_ice_wrap_change_components (struct ast_rtp_instance *instance, int num_components)
static struct ao2_container *	rtp_ice_wrap_get_local_candidates (struct ast_rtp_instance *instance)
static const char *	rtp_ice_wrap_get_password (struct ast_rtp_instance *instance)
static const char *	rtp_ice_wrap_get_ufrag (struct ast_rtp_instance *instance)
static void	rtp_ice_wrap_ice_lite (struct ast_rtp_instance *instance)
static void	rtp_ice_wrap_set_authentication (struct ast_rtp_instance *instance, const char *ufrag, const char *password)
static void	rtp_ice_wrap_set_role (struct ast_rtp_instance *instance, enum ast_rtp_ice_role role)
static void	rtp_ice_wrap_start (struct ast_rtp_instance *instance)
static void	rtp_ice_wrap_stop (struct ast_rtp_instance *instance)
static void	rtp_ice_wrap_turn_request (struct ast_rtp_instance *instance, enum ast_rtp_ice_component_type component, enum ast_transport transport, const char *server, unsigned int port, const char *username, const char *password)
static void	rtp_instance_set_incoming_source_address_nolock (struct ast_rtp_instance *instance, const struct ast_sockaddr *address)
static struct ast_rtp_payload_type *	rtp_payload_type_alloc (struct ast_format *format, int payload, int rtp_code, int primary_mapping)
static void	rtp_payload_type_dtor (void *obj)
static void	rtp_rtcp_report_dtor (void *obj)
static void	set_next_mime_type (struct ast_format *format, int rtp_code, const char *type, const char *subtype, unsigned int sample_rate)
static void	unref_instance_cond (struct ast_rtp_instance **instance)
	Conditionally unref an rtp instance. More...
	STASIS_MESSAGE_TYPE_DEFN (ast_rtp_rtcp_sent_type,.to_ami=rtcp_report_to_ami,.to_json=rtcp_report_to_json,)
	Define RTCP/RTP message types. More...
	STASIS_MESSAGE_TYPE_DEFN (ast_rtp_rtcp_received_type,.to_ami=rtcp_report_to_ami,.to_json=rtcp_report_to_json,)

Variables
static struct ast_rtp_mime_type	ast_rtp_mime_types [128]
static uintmax_t	debug_category_dtls_id
static uintmax_t	debug_category_dtls_packet_id
static uintmax_t	debug_category_ice_id
static uintmax_t	debug_category_rtcp_id
static uintmax_t	debug_category_rtcp_packet_id
static uintmax_t	debug_category_rtp_id
static uintmax_t	debug_category_rtp_packet_id
static struct engines	engines = { .first = NULL, .last = NULL, .lock = { PTHREAD_RWLOCK_INITIALIZER , NULL, {1, 0} } , }
static struct glues	glues = { .first = NULL, .last = NULL, .lock = { PTHREAD_RWLOCK_INITIALIZER , NULL, {1, 0} } , }
static int	mime_types_len = 0
static ast_rwlock_t	mime_types_lock
struct ast_srtp_res *	res_srtp = NULL
struct ast_srtp_policy_res *	res_srtp_policy = NULL
static struct ast_rtp_engine_dtls	rtp_dtls_wrappers
static const char *const	rtp_extension_uris [AST_RTP_EXTENSION_MAX]
	URIs for known RTP extensions. More...
static struct ast_rtp_engine_ice	rtp_ice_wrappers
static struct stasis_topic *	rtp_topic
	Stasis Message Bus API topic for RTP related messages More...
static struct ast_rtp_payload_type *	static_RTP_PT [AST_RTP_MAX_PT]
	Mapping between Asterisk codecs and rtp payload types. More...
static ast_rwlock_t	static_RTP_PT_lock

Detailed Description

Pluggable RTP Architecture.

Author

Joshua Colp jcolp[email protected]@dig[email protected]ium.c[email protected]om

Definition in file rtp_engine.c.

Macro Definition Documentation

MAX_RTP_MIME_TYPES

#define MAX_RTP_MIME_TYPES   128

Definition at line 247 of file rtp_engine.c.

SET_AST_JSON_OBJ

#define SET_AST_JSON_OBJ	(		target,
			name,
			obj
	)

Set given json object into target with name.

Parameters

target	Target json.
name	key of given object.
obj	Json value will be set.

Definition at line 288 of file rtp_engine.c.

Referenced by ast_rtp_convert_stats_json().

Function Documentation

add_static_payload()

static void add_static_payload ( int  payload, struct ast_format *  format, int  rtp_code  )

static

Definition at line 3183 of file rtp_engine.c.

References ao2_cleanup, ARRAY_LEN, ast_assert, ast_format_get_name(), ast_log, ast_option_rtpusedynamic, ast_rwlock_unlock, ast_rwlock_wrlock, find_unused_payload(), LOG_WARNING, NULL, ast_rtp_payload_type::payload, rtp_payload_type_alloc(), and type.

Referenced by ast_rtp_engine_init(), and ast_rtp_engine_load_format().

{
 struct ast_rtp_payload_type *type;

 /*
 * ARRAY_LEN's result is cast to an int so 'map' is not autocast to a size_t,
 * which if negative would cause an assertion.
 */
 ast_assert(payload < (int)ARRAY_LEN(static_RTP_PT));

 if (ast_option_rtpusedynamic && payload < 0) {
 /*
 * We're going to build dynamic payloads dynamically. An RTP code is
 * required otherwise one will be dynamically allocated per instance.
 */
 return;
 }

 /*
 * Either the given payload is truly a static type, or Asterisk is
 * globally storing the dynamic payloads in the static_RTP_PT object.
 */
 ast_rwlock_wrlock(&static_RTP_PT_lock);

 if (payload < 0) {
 /*
 * This is a dynamic payload that will be stored globally,
 * so find the next available empty slot.
 */
 payload = find_unused_payload(NULL);
 if (payload < 0) {
 ast_log(LOG_WARNING, "No dynamic RTP payload type values available "
 "for %s - %d!\n", format ? ast_format_get_name(format) : "", rtp_code);
 ast_rwlock_unlock(&static_RTP_PT_lock);
 return;
 }
 }

 type = rtp_payload_type_alloc(format, payload, rtp_code, 1);
 if (type) {
 ao2_cleanup(static_RTP_PT[payload]);
 static_RTP_PT[payload] = type;
 }
 ast_rwlock_unlock(&static_RTP_PT_lock);
}

ast_rtp_codecs_find_payload_code()

int ast_rtp_codecs_find_payload_code	(	struct ast_rtp_codecs *	codecs,
		int	payload
	)

Search for the tx payload type in the ast_rtp_codecs structure.

Parameters

codecs	Codecs structure to look in
payload	The payload type format to look for

Return values

Numerical

payload type or -1 if unable to find payload in codecs

Example usage:

int payload = ast_rtp_codecs_find_payload_code(&codecs, 0);

This looks for the numerical payload for ULAW in the codecs structure.

Definition at line 1975 of file rtp_engine.c.

References ast_rwlock_rdlock, ast_rwlock_unlock, AST_VECTOR_GET, AST_VECTOR_SIZE, ast_rtp_codecs::codecs_lock, ast_rtp_payload_type::payload, and type.

Referenced by bridge_p2p_rtp_write().

{
 struct ast_rtp_payload_type *type;
 int res = -1;

 ast_rwlock_rdlock(&codecs->codecs_lock);
 if (payload < AST_VECTOR_SIZE(&codecs->payload_mapping_tx)) {
 type = AST_VECTOR_GET(&codecs->payload_mapping_tx, payload);
 if (type) {
 res = payload;
 }
 }
 ast_rwlock_unlock(&codecs->codecs_lock);

 return res;
}

ast_rtp_codecs_get_framing()

unsigned int ast_rtp_codecs_get_framing

(

struct ast_rtp_codecs *

codecs

)

Get the framing used for a set of codecs.

Parameters

codecs

Codecs structure to get the framing from

Return values

The	framing to be used for the media stream associated with these codecs

Since

13.0.0

Definition at line 1569 of file rtp_engine.c.

References ast_rwlock_rdlock, ast_rwlock_unlock, ast_rtp_codecs::codecs_lock, and ast_rtp_codecs::framing.

Referenced by ast_rtp_write(), create_outgoing_sdp_stream(), multicast_rtp_write(), native_rtp_bridge_compatible_check(), and process_sdp().

{
 unsigned int framing;

 ast_rwlock_rdlock(&codecs->codecs_lock);
 framing = codecs->framing;
 ast_rwlock_unlock(&codecs->codecs_lock);

 return framing;
}

ast_rtp_codecs_get_payload()

struct ast_rtp_payload_type* ast_rtp_codecs_get_payload	(	struct ast_rtp_codecs *	codecs,
		int	payload
	)

Retrieve rx payload mapped information by payload type.

Parameters

codecs	Codecs structure to look in
payload	Numerical payload to look up

Return values

Payload	information.
NULL	if payload does not exist.

Note

The payload returned by this function has its reference count increased. Callers are responsible for decrementing the reference count.

Example usage:

struct ast_rtp_payload_type *payload_type;
payload_type = ast_rtp_codecs_get_payload(&codecs, 0);

This looks up the information for payload '0' from the codecs structure.

Definition at line 1479 of file rtp_engine.c.

References ao2_bump, AST_RTP_MAX_PT, AST_RTP_PT_LAST_STATIC, ast_rwlock_rdlock, ast_rwlock_unlock, AST_VECTOR_GET, AST_VECTOR_SIZE, ast_rtp_codecs::codecs_lock, NULL, and type.

Referenced by ast_rtp_interpret(), and bridge_p2p_rtp_write().

{
 struct ast_rtp_payload_type *type = NULL;

 if (payload < 0 || payload >= AST_RTP_MAX_PT) {
 return NULL;
 }

 ast_rwlock_rdlock(&codecs->codecs_lock);
 if (payload < AST_VECTOR_SIZE(&codecs->payload_mapping_rx)) {
 type = AST_VECTOR_GET(&codecs->payload_mapping_rx, payload);
 ao2_bump(type);
 }
 ast_rwlock_unlock(&codecs->codecs_lock);

 if (!type && payload <= AST_RTP_PT_LAST_STATIC) {
 ast_rwlock_rdlock(&static_RTP_PT_lock);
 type = ao2_bump(static_RTP_PT[payload]);
 ast_rwlock_unlock(&static_RTP_PT_lock);
 }

 return type;
}

ast_rtp_codecs_get_payload_format()

struct ast_format* ast_rtp_codecs_get_payload_format	(	struct ast_rtp_codecs *	codecs,
		int	payload
	)

Retrieve the actual ast_format stored on the codecs structure for a specific tx payload type.

Parameters

codecs	Codecs structure to look in
payload	Numerical payload type to look up

Return values

pointer	to format structure on success
NULL	on failure

Note

The format returned by this function has its reference count increased. Callers are responsible for decrementing the reference count.

Since

10.0

Definition at line 1537 of file rtp_engine.c.

References ao2_bump, AST_RTP_MAX_PT, ast_rwlock_rdlock, ast_rwlock_unlock, AST_VECTOR_GET, AST_VECTOR_SIZE, ast_rtp_payload_type::asterisk_format, ast_rtp_codecs::codecs_lock, format, ast_rtp_payload_type::format, NULL, and type.

Referenced by get_codecs(), process_sdp_a_audio(), and process_sdp_a_video().

{
 struct ast_rtp_payload_type *type;
 struct ast_format *format = NULL;

 if (payload < 0 || payload >= AST_RTP_MAX_PT) {
 return NULL;
 }

 ast_rwlock_rdlock(&codecs->codecs_lock);
 if (payload < AST_VECTOR_SIZE(&codecs->payload_mapping_tx)) {
 type = AST_VECTOR_GET(&codecs->payload_mapping_tx, payload);
 if (type && type->asterisk_format) {
 format = ao2_bump(type->format);
 }
 }
 ast_rwlock_unlock(&codecs->codecs_lock);

 return format;
}

ast_rtp_codecs_get_stream_type()

enum ast_media_type ast_rtp_codecs_get_stream_type

(

struct ast_rtp_codecs *

codecs

)

Determine the type of RTP stream media from the codecs mapped.

Since

13.19.0

Parameters

codecs

Codecs structure to look in

Returns

Media type or AST_MEDIA_TYPE_UNKNOWN if no codecs mapped.

Definition at line 1460 of file rtp_engine.c.

References ast_format_get_type(), AST_MEDIA_TYPE_UNKNOWN, ast_rwlock_rdlock, ast_rwlock_unlock, AST_VECTOR_GET, AST_VECTOR_SIZE, ast_rtp_payload_type::asterisk_format, ast_rtp_codecs::codecs_lock, ast_rtp_payload_type::format, ast_rtp_payload_type::payload, and type.

Referenced by ast_rtp_read().

{
 enum ast_media_type stream_type = AST_MEDIA_TYPE_UNKNOWN;
 int payload;
 struct ast_rtp_payload_type *type;

 ast_rwlock_rdlock(&codecs->codecs_lock);
 for (payload = 0; payload < AST_VECTOR_SIZE(&codecs->payload_mapping_rx); ++payload) {
 type = AST_VECTOR_GET(&codecs->payload_mapping_rx, payload);
 if (type && type->asterisk_format) {
 stream_type = ast_format_get_type(type->format);
 break;
 }
 }
 ast_rwlock_unlock(&codecs->codecs_lock);

 return stream_type;
}

ast_rtp_codecs_payload_code()

int ast_rtp_codecs_payload_code	(	struct ast_rtp_codecs *	codecs,
		int	asterisk_format,
		struct ast_format *	format,
		int	code
	)

Retrieve a rx mapped payload type based on whether it is an Asterisk format and the code.

Parameters

codecs	Codecs structure to look in
asterisk_format	Non-zero if the given Asterisk format is present
format	Asterisk format to look for
code	The format to look for

Find the currently assigned rx mapped payload type based on whether it is an Asterisk format or non-format code. If one is currently not assigned then create a rx payload type mapping.

Return values

Numerical	payload type
-1	if could not assign.

Example usage:

int payload = ast_rtp_codecs_payload_code(&codecs, 1, ast_format_set(&tmp_fmt, AST_FORMAT_ULAW, 0), 0);

This looks for the numerical payload for ULAW in the codecs structure.

Since

1.8

Definition at line 1873 of file rtp_engine.c.

References ast_format_cmp(), AST_FORMAT_CMP_EQUAL, ast_rwlock_rdlock, ast_rwlock_unlock, AST_VECTOR_GET, AST_VECTOR_SIZE, ast_rtp_payload_type::asterisk_format, ast_rtp_codecs::codecs_lock, ast_rtp_payload_type::format, ast_rtp_payload_type::payload, ast_rtp_payload_type::primary_mapping, ast_rtp_payload_type::rtp_code, rtp_codecs_assign_payload_code_rx(), and type.

Referenced by add_codec_to_sdp(), add_noncodec_to_sdp(), add_sdp(), add_tcodec_to_sdp(), add_vcodec_to_sdp(), apply_cap_to_bundled(), create_outgoing_sdp_stream(), and jingle_add_payloads_to_description().

{
 struct ast_rtp_payload_type *type;
 int idx;
 int payload = -1;

 ast_rwlock_rdlock(&static_RTP_PT_lock);
 if (!asterisk_format) {
 ast_rwlock_rdlock(&codecs->codecs_lock);
 for (idx = 0; idx < AST_VECTOR_SIZE(&codecs->payload_mapping_rx); ++idx) {
 type = AST_VECTOR_GET(&codecs->payload_mapping_rx, idx);
 if (!type) {
 continue;
 }

 if (!type->asterisk_format
 && type->primary_mapping
 && type->rtp_code == code) {
 payload = idx;
 break;
 }
 }
 ast_rwlock_unlock(&codecs->codecs_lock);
 } else if (format) {
 ast_rwlock_rdlock(&codecs->codecs_lock);
 for (idx = 0; idx < AST_VECTOR_SIZE(&codecs->payload_mapping_rx); ++idx) {
 type = AST_VECTOR_GET(&codecs->payload_mapping_rx, idx);
 if (!type) {
 continue;
 }

 if (type->asterisk_format
 && type->primary_mapping
 && ast_format_cmp(format, type->format) == AST_FORMAT_CMP_EQUAL) {
 payload = idx;
 break;
 }
 }
 ast_rwlock_unlock(&codecs->codecs_lock);
 }

 if (payload < 0) {
 payload = rtp_codecs_assign_payload_code_rx(codecs, asterisk_format, format,
 code, 0);
 }
 ast_rwlock_unlock(&static_RTP_PT_lock);

 return payload;
}

ast_rtp_codecs_payload_code_tx()

int ast_rtp_codecs_payload_code_tx	(	struct ast_rtp_codecs *	codecs,
		int	asterisk_format,
		const struct ast_format *	format,
		int	code
	)

Retrieve a tx mapped payload type based on whether it is an Asterisk format and the code.

Since

14.0.0

Parameters

codecs	Codecs structure to look in
asterisk_format	Non-zero if the given Asterisk format is present
format	Asterisk format to look for
code	The format to look for

Return values

Numerical	payload type
-1	if not found.

Definition at line 1928 of file rtp_engine.c.

References ast_format_cmp(), AST_FORMAT_CMP_EQUAL, ast_rwlock_rdlock, ast_rwlock_unlock, AST_VECTOR_GET, AST_VECTOR_SIZE, ast_rtp_payload_type::asterisk_format, ast_rtp_codecs::codecs_lock, find_static_payload_type(), ast_rtp_payload_type::format, ast_rtp_payload_type::payload, ast_rtp_payload_type::rtp_code, and type.

Referenced by ast_rtp_dtmf_begin(), ast_rtp_sendcng(), ast_rtp_write(), bridge_p2p_rtp_write(), multicast_rtp_write(), and send_start_rtp().

{
 struct ast_rtp_payload_type *type;
 int idx;
 int payload = -1;

 if (!asterisk_format) {
 ast_rwlock_rdlock(&codecs->codecs_lock);
 for (idx = 0; idx < AST_VECTOR_SIZE(&codecs->payload_mapping_tx); ++idx) {
 type = AST_VECTOR_GET(&codecs->payload_mapping_tx, idx);
 if (!type) {
 continue;
 }

 if (!type->asterisk_format
 && type->rtp_code == code) {
 payload = idx;
 break;
 }
 }
 ast_rwlock_unlock(&codecs->codecs_lock);
 } else if (format) {
 ast_rwlock_rdlock(&codecs->codecs_lock);
 for (idx = 0; idx < AST_VECTOR_SIZE(&codecs->payload_mapping_tx); ++idx) {
 type = AST_VECTOR_GET(&codecs->payload_mapping_tx, idx);
 if (!type) {
 continue;
 }

 if (type->asterisk_format
 && ast_format_cmp(format, type->format) == AST_FORMAT_CMP_EQUAL) {
 payload = idx;
 break;
 }
 }
 ast_rwlock_unlock(&codecs->codecs_lock);
 }

 if (payload < 0) {
 ast_rwlock_rdlock(&static_RTP_PT_lock);
 payload = find_static_payload_type(asterisk_format, format, code);
 ast_rwlock_unlock(&static_RTP_PT_lock);
 }

 return payload;
}

ast_rtp_codecs_payload_formats()

void ast_rtp_codecs_payload_formats	(	struct ast_rtp_codecs *	codecs,
		struct ast_format_cap *	astformats,
		int *	nonastformats
	)

Retrieve all formats that were found.

Parameters

codecs	Codecs structure to look in
astformats	A capabilities structure to put the Asterisk formats in.
nonastformats	An integer to put the non-Asterisk formats in

Example usage:

struct ast_format_cap *astformats = ast_format_cap_alloc_nolock()
int nonastformats;
ast_rtp_codecs_payload_formats(&codecs, astformats, &nonastformats);

This retrieves all the formats known about in the codecs structure and puts the Asterisk ones in the integer pointed to by astformats and the non-Asterisk ones in the integer pointed to by nonastformats.

Since

1.8

Definition at line 1580 of file rtp_engine.c.

References ast_format_cap_append, ast_format_cap_remove_by_type(), ast_format_cap_set_framing(), AST_MEDIA_TYPE_UNKNOWN, ast_rwlock_rdlock, ast_rwlock_unlock, AST_VECTOR_GET, AST_VECTOR_SIZE, ast_rtp_payload_type::asterisk_format, ast_rtp_codecs::codecs_lock, ast_rtp_payload_type::format, ast_rtp_codecs::framing, ast_rtp_payload_type::rtp_code, and type.

Referenced by jingle_interpret_description(), process_sdp(), set_caps(), and set_incoming_call_offer_cap().

{
 int idx;

 ast_format_cap_remove_by_type(astformats, AST_MEDIA_TYPE_UNKNOWN);
 *nonastformats = 0;

 ast_rwlock_rdlock(&codecs->codecs_lock);

 for (idx = 0; idx < AST_VECTOR_SIZE(&codecs->payload_mapping_tx); ++idx) {
 struct ast_rtp_payload_type *type;

 type = AST_VECTOR_GET(&codecs->payload_mapping_tx, idx);
 if (!type) {
 continue;
 }

 if (type->asterisk_format) {
 ast_format_cap_append(astformats, type->format, 0);
 } else {
 *nonastformats |= type->rtp_code;
 }
 }
 if (codecs->framing) {
 ast_format_cap_set_framing(astformats, codecs->framing);
 }

 ast_rwlock_unlock(&codecs->codecs_lock);
}

ast_rtp_codecs_payload_replace_format()

int ast_rtp_codecs_payload_replace_format	(	struct ast_rtp_codecs *	codecs,
		int	payload,
		struct ast_format *	format
	)

Update the format associated with a tx payload type in a codecs structure.

Parameters

codecs	Codecs structure to operate on
payload	Numerical payload type to look up
format	The format to replace the existing one

Return values

0	success
-1	failure

Since

13

Definition at line 1503 of file rtp_engine.c.

References ao2_cleanup, ao2_ref, ast_rtp_engine_alloc_payload_type(), AST_RTP_MAX_PT, ast_rwlock_unlock, ast_rwlock_wrlock, AST_VECTOR_GET, AST_VECTOR_REPLACE, AST_VECTOR_SIZE, ast_rtp_payload_type::asterisk_format, ast_rtp_codecs::codecs_lock, format, ast_rtp_payload_type::format, ast_rtp_payload_type::payload, payload_mapping_tx_is_present(), ast_rtp_payload_type::primary_mapping, and type.

Referenced by get_codecs(), process_sdp_a_audio(), and process_sdp_a_video().

{
 struct ast_rtp_payload_type *type;

 if (payload < 0 || payload >= AST_RTP_MAX_PT || !format) {
 return -1;
 }

 type = ast_rtp_engine_alloc_payload_type();
 if (!type) {
 return -1;
 }
 ao2_ref(format, +1);
 type->format = format;
 type->asterisk_format = 1;
 type->payload = payload;
 type->primary_mapping = 1;

 ast_rwlock_wrlock(&codecs->codecs_lock);
 if (!payload_mapping_tx_is_present(codecs, type)) {
 if (payload < AST_VECTOR_SIZE(&codecs->payload_mapping_tx)) {
 ao2_cleanup(AST_VECTOR_GET(&codecs->payload_mapping_tx, payload));
 }
 if (AST_VECTOR_REPLACE(&codecs->payload_mapping_tx, payload, type)) {
 ao2_ref(type, -1);
 }
 } else {
 ao2_ref(type, -1);
 }
 ast_rwlock_unlock(&codecs->codecs_lock);

 return 0;
}

ast_rtp_codecs_payload_set_rx()

int ast_rtp_codecs_payload_set_rx	(	struct ast_rtp_codecs *	codecs,
		int	code,
		struct ast_format *	format
	)

Set a payload code for use with a specific Asterisk format.

Parameters

codecs	Codecs structure to manipulate
code	The payload code
format	Asterisk format

Return values

0	Payload was set to the given format
-1	Payload was in use or could not be set

Since

15.0.0

Definition at line 1923 of file rtp_engine.c.

References rtp_codecs_assign_payload_code_rx().

Referenced by apply_cap_to_bundled(), and create_outgoing_sdp_stream().

{
 return rtp_codecs_assign_payload_code_rx(codecs, 1, format, code, 1);
}

ast_rtp_codecs_payloads_clear()

void ast_rtp_codecs_payloads_clear	(	struct ast_rtp_codecs *	codecs,
		struct ast_rtp_instance *	instance
	)

Clear rx and tx payload mapping information from an RTP instance.

Parameters

codecs	The codecs structure that payloads will be cleared from
instance	Optionally the instance that the codecs structure belongs to

Example usage:

struct ast_rtp_codecs codecs;
ast_rtp_codecs_payloads_clear(&codecs, NULL);

This clears the codecs structure and puts it into a pristine state.

Since

1.8

Definition at line 994 of file rtp_engine.c.

References ao2_lock, ao2_unlock, ast_rtp_codecs_payloads_destroy(), ast_rtp_codecs_payloads_initialize(), AST_RTP_MAX_PT, ast_rtp_instance::engine, NULL, and ast_rtp_engine::payload_set.

{
 ast_rtp_codecs_payloads_destroy(codecs);
 ast_rtp_codecs_payloads_initialize(codecs);

 if (instance && instance->engine && instance->engine->payload_set) {
 int i;

 ao2_lock(instance);
 for (i = 0; i < AST_RTP_MAX_PT; i++) {
 instance->engine->payload_set(instance, i, 0, NULL, 0);
 }
 ao2_unlock(instance);
 }
}

ast_rtp_codecs_payloads_copy()

void ast_rtp_codecs_payloads_copy	(	struct ast_rtp_codecs *	src,
		struct ast_rtp_codecs *	dest,
		struct ast_rtp_instance *	instance
	)

Copy payload information from one RTP instance to another.

Parameters

src	The source codecs structure
dest	The destination codecs structure that the values from src will be copied to
instance	Optionally the instance that the dst codecs structure belongs to

Example usage:

ast_rtp_codecs_payloads_copy(&codecs0, &codecs1, NULL);

This copies the payloads from the codecs0 structure to the codecs1 structure, overwriting any current values.

Since

1.8

Definition at line 1224 of file rtp_engine.c.

References ao2_t_cleanup, ast_rwlock_tryrdlock, ast_rwlock_unlock, ast_rwlock_wrlock, AST_VECTOR_GET, AST_VECTOR_REPLACE, AST_VECTOR_SIZE, ast_rtp_codecs::codecs_lock, ast_rtp_codecs::framing, NULL, rtp_codecs_payloads_copy_rx(), rtp_codecs_payloads_copy_tx(), and type.

Referenced by jingle_interpret_description(), process_sdp(), set_caps(), and set_incoming_call_offer_cap().

{
 int idx;
 struct ast_rtp_payload_type *type;

 ast_rwlock_wrlock(&dest->codecs_lock);

 /* Deadlock avoidance because of held write lock. */
 while (ast_rwlock_tryrdlock(&src->codecs_lock)) {
 ast_rwlock_unlock(&dest->codecs_lock);
 sched_yield();
 ast_rwlock_wrlock(&dest->codecs_lock);
 }

 /*
 * This represents a completely new mapping of what the remote party is
 * expecting for payloads, so we clear out the entire tx payload mapping
 * vector and replace it.
 */
 for (idx = 0; idx < AST_VECTOR_SIZE(&dest->payload_mapping_tx); ++idx) {
 type = AST_VECTOR_GET(&dest->payload_mapping_tx, idx);
 ao2_t_cleanup(type, "destroying ast_rtp_codec tx mapping");
 AST_VECTOR_REPLACE(&dest->payload_mapping_tx, idx, NULL);
 }

 rtp_codecs_payloads_copy_rx(src, dest, instance);
 rtp_codecs_payloads_copy_tx(src, dest, instance);
 dest->framing = src->framing;

 ast_rwlock_unlock(&src->codecs_lock);
 ast_rwlock_unlock(&dest->codecs_lock);
}

ast_rtp_codecs_payloads_destroy()

void ast_rtp_codecs_payloads_destroy

(

struct ast_rtp_codecs *

codecs

)

Destroy the contents of an RTP codecs structure (but not the structure itself)

Parameters

codecs

The codecs structure to destroy the contents of

Example usage:

struct ast_rtp_codecs codecs;
ast_rtp_codecs_payloads_destroy(&codecs);

Since

11

Definition at line 974 of file rtp_engine.c.

References ao2_t_cleanup, ast_rwlock_destroy, AST_VECTOR_FREE, AST_VECTOR_GET, AST_VECTOR_SIZE, ast_rtp_codecs::codecs_lock, and type.

Referenced by ast_rtp_codecs_payloads_clear(), ast_stream_free(), ast_stream_set_rtp_codecs(), instance_destructor(), jingle_interpret_description(), process_sdp(), set_caps(), and set_incoming_call_offer_cap().

{
 int idx;
 struct ast_rtp_payload_type *type;

 for (idx = 0; idx < AST_VECTOR_SIZE(&codecs->payload_mapping_rx); ++idx) {
 type = AST_VECTOR_GET(&codecs->payload_mapping_rx, idx);
 ao2_t_cleanup(type, "destroying ast_rtp_codec rx mapping");
 }
 AST_VECTOR_FREE(&codecs->payload_mapping_rx);

 for (idx = 0; idx < AST_VECTOR_SIZE(&codecs->payload_mapping_tx); ++idx) {
 type = AST_VECTOR_GET(&codecs->payload_mapping_tx, idx);
 ao2_t_cleanup(type, "destroying ast_rtp_codec tx mapping");
 }
 AST_VECTOR_FREE(&codecs->payload_mapping_tx);

 ast_rwlock_destroy(&codecs->codecs_lock);
}

ast_rtp_codecs_payloads_initialize()

int ast_rtp_codecs_payloads_initialize

(

struct ast_rtp_codecs *

codecs

)

Initialize an RTP codecs structure.

Parameters

codecs

The codecs structure to initialize

Return values

0	success
-1	failure

Example usage:

struct ast_rtp_codecs codecs;
ast_rtp_codecs_payloads_initialize(&codecs);

Since

11

Definition at line 958 of file rtp_engine.c.

References AST_RTP_MAX_PT, ast_rwlock_init, AST_VECTOR_FREE, AST_VECTOR_INIT, ast_rtp_codecs::codecs_lock, and ast_rtp_codecs::framing.

Referenced by ast_rtp_codecs_payloads_clear(), ast_rtp_instance_new(), get_codecs(), jingle_interpret_description(), and process_sdp().

{
 int res;

 codecs->framing = 0;
 ast_rwlock_init(&codecs->codecs_lock);
 res = AST_VECTOR_INIT(&codecs->payload_mapping_rx, AST_RTP_MAX_PT);
 res |= AST_VECTOR_INIT(&codecs->payload_mapping_tx, AST_RTP_MAX_PT);
 if (res) {
 AST_VECTOR_FREE(&codecs->payload_mapping_rx);
 AST_VECTOR_FREE(&codecs->payload_mapping_tx);
 }

 return res;
}

ast_rtp_codecs_payloads_set_m_type()

void ast_rtp_codecs_payloads_set_m_type	(	struct ast_rtp_codecs *	codecs,
		struct ast_rtp_instance *	instance,
		int	payload
	)

Record tx payload type information that was seen in an m= SDP line.

Parameters

codecs	The codecs structure to muck with
instance	Optionally the instance that the codecs structure belongs to
payload	Numerical payload that was seen in the m= SDP line

Example usage:

ast_rtp_codecs_payloads_set_m_type(&codecs, NULL, 0);

This records that the numerical payload '0' was seen in the codecs structure.

Since

1.8

Definition at line 1301 of file rtp_engine.c.

References ao2_bump, ao2_lock, ao2_ref, ao2_t_cleanup, ao2_unlock, ast_debug, AST_RTP_MAX_PT, AST_RTP_PT_LAST_STATIC, ast_rwlock_rdlock, ast_rwlock_unlock, ast_rwlock_wrlock, AST_VECTOR_GET, AST_VECTOR_REPLACE, AST_VECTOR_SIZE, ast_rtp_payload_type::asterisk_format, ast_rtp_codecs::codecs_lock, ast_rtp_instance::engine, ast_rtp_payload_type::format, 10aedae86a32_add_outgoing_enum_va::new_type, payload_mapping_tx_is_present(), ast_rtp_engine::payload_set, and ast_rtp_payload_type::rtp_code.

Referenced by get_codecs(), and process_sdp().

{
 struct ast_rtp_payload_type *new_type;

 if (payload < 0 || payload >= AST_RTP_MAX_PT || payload > AST_RTP_PT_LAST_STATIC) {
 return;
 }

 ast_rwlock_rdlock(&static_RTP_PT_lock);
 new_type = ao2_bump(static_RTP_PT[payload]);
 ast_rwlock_unlock(&static_RTP_PT_lock);
 if (!new_type) {
 ast_debug(1, "Don't have a default tx payload type %d format for m type on %p\n",
 payload, codecs);
 return;
 }

 ast_debug(1, "Setting tx payload type %d based on m type on %p\n",
 payload, codecs);

 ast_rwlock_wrlock(&codecs->codecs_lock);

 if (!payload_mapping_tx_is_present(codecs, new_type)) {
 if (payload < AST_VECTOR_SIZE(&codecs->payload_mapping_tx)) {
 ao2_t_cleanup(AST_VECTOR_GET(&codecs->payload_mapping_tx, payload),
 "cleaning up replaced tx payload type");
 }

 if (AST_VECTOR_REPLACE(&codecs->payload_mapping_tx, payload, new_type)) {
 ao2_ref(new_type, -1);
 } else if (instance && instance->engine && instance->engine->payload_set) {
 ao2_lock(instance);
 instance->engine->payload_set(instance, payload, new_type->asterisk_format, new_type->format, new_type->rtp_code);
 ao2_unlock(instance);
 }
 } else {
 ao2_ref(new_type, -1);
 }

 ast_rwlock_unlock(&codecs->codecs_lock);
}

ast_rtp_codecs_payloads_set_rtpmap_type()

int ast_rtp_codecs_payloads_set_rtpmap_type	(	struct ast_rtp_codecs *	codecs,
		struct ast_rtp_instance *	instance,
		int	payload,
		char *	mimetype,
		char *	mimesubtype,
		enum ast_rtp_options	options
	)

Record tx payload type information that was seen in an a=rtpmap: SDP line.

Parameters

codecs	The codecs structure to muck with
instance	Optionally the instance that the codecs structure belongs to
payload	Numerical payload that was seen in the a=rtpmap: SDP line
mimetype	The string mime type that was seen
mimesubtype	The strin mime sub type that was seen
options	Optional options that may change the behavior of this specific payload

Return values

0	success
-1	failure, invalid payload numbe
-2	failure, unknown mimetype

Example usage:

ast_rtp_codecs_payloads_set_rtpmap_type(&codecs, NULL, 0, "audio", "PCMU", 0);

This records that the numerical payload '0' was seen with mime type 'audio' and sub mime type 'PCMU' in the codecs structure.

Since

1.8

Definition at line 1428 of file rtp_engine.c.

References ast_rtp_codecs_payloads_set_rtpmap_type_rate().

Referenced by configure_local_rtp(), jingle_interpret_description(), ooh323_set_write_format(), process_sdp(), and setup_rtp_connection().

{
 return ast_rtp_codecs_payloads_set_rtpmap_type_rate(codecs, instance, payload, mimetype, mimesubtype, options, 0);
}

ast_rtp_codecs_payloads_set_rtpmap_type_rate()

int ast_rtp_codecs_payloads_set_rtpmap_type_rate	(	struct ast_rtp_codecs *	codecs,
		struct ast_rtp_instance *	instance,
		int	pt,
		char *	mimetype,
		char *	mimesubtype,
		enum ast_rtp_options	options,
		unsigned int	sample_rate
	)

Set tx payload type to a known MIME media type for a codec with a specific sample rate.

Parameters

codecs	RTP structure to modify
instance	Optionally the instance that the codecs structure belongs to
pt	Payload type entry to modify
mimetype	top-level MIME type of media stream (typically "audio", "video", "text", etc.)
mimesubtype	MIME subtype of media stream (typically a codec name)
options	Zero or more flags from the ast_rtp_options enum
sample_rate	The sample rate of the media stream

This function 'fills in' an entry in the list of possible formats for a media stream associated with an RTP structure.

Return values

0	on success
-1	if the payload type is out of range
-2	if the mimeType/mimeSubtype combination was not found

Since

1.8

Definition at line 1343 of file rtp_engine.c.

References ao2_lock, ao2_ref, ao2_t_cleanup, ao2_unlock, ast_format_cmp(), AST_FORMAT_CMP_EQUAL, ast_format_g726, ast_format_g726_aal2, ast_format_parse_sdp_fmtp(), ast_rtp_engine_alloc_payload_type(), AST_RTP_MAX_PT, ast_rtp_mime_types, AST_RTP_OPT_G726_NONSTANDARD, ast_rwlock_rdlock, ast_rwlock_unlock, ast_rwlock_wrlock, AST_VECTOR_GET, AST_VECTOR_REPLACE, AST_VECTOR_SIZE, ast_rtp_payload_type::asterisk_format, ast_rtp_codecs::codecs_lock, ast_rtp_instance::engine, ast_rtp_payload_type::format, mime_types_len, 10aedae86a32_add_outgoing_enum_va::new_type, ast_rtp_payload_type::payload, payload_mapping_tx_is_present(), ast_rtp_engine::payload_set, ast_rtp_mime_type::payload_type, ast_rtp_payload_type::primary_mapping, ast_rtp_payload_type::rtp_code, ast_rtp_mime_type::sample_rate, ast_rtp_mime_type::subtype, and ast_rtp_mime_type::type.

Referenced by ast_rtp_codecs_payloads_set_rtpmap_type(), get_codecs(), jingle_interpret_description(), process_sdp_a_audio(), process_sdp_a_text(), and process_sdp_a_video().

{
 unsigned int idx;
 int found = 0;

 if (pt < 0 || pt >= AST_RTP_MAX_PT) {
 return -1; /* bogus payload type */
 }

 ast_rwlock_rdlock(&mime_types_lock);
 ast_rwlock_wrlock(&codecs->codecs_lock);

 for (idx = 0; idx < mime_types_len; ++idx) {
 const struct ast_rtp_mime_type *t = &ast_rtp_mime_types[idx];
 struct ast_rtp_payload_type *new_type;

 if (strcasecmp(mimesubtype, t->subtype)) {
 continue;
 }

 if (strcasecmp(mimetype, t->type)) {
 continue;
 }

 /* if both sample rates have been supplied, and they don't match,
 * then this not a match; if one has not been supplied, then the
 * rates are not compared */
 if (sample_rate && t->sample_rate &&
 (sample_rate != t->sample_rate)) {
 continue;
 }

 found = 1;

 new_type = ast_rtp_engine_alloc_payload_type();
 if (!new_type) {
 continue;
 }

 new_type->asterisk_format = t->payload_type.asterisk_format;
 new_type->rtp_code = t->payload_type.rtp_code;
 new_type->payload = pt;
 new_type->primary_mapping = 1;
 if (t->payload_type.asterisk_format
 && ast_format_cmp(t->payload_type.format, ast_format_g726) == AST_FORMAT_CMP_EQUAL
 && (options & AST_RTP_OPT_G726_NONSTANDARD)) {
 new_type->format = ast_format_g726_aal2;
 } else {
 new_type->format = t->payload_type.format;
 }

 if (new_type->format) {
 /* SDP parsing automatically increases the reference count */
 new_type->format = ast_format_parse_sdp_fmtp(new_type->format, "");
 }

 if (!payload_mapping_tx_is_present(codecs, new_type)) {
 if (pt < AST_VECTOR_SIZE(&codecs->payload_mapping_tx)) {
 ao2_t_cleanup(AST_VECTOR_GET(&codecs->payload_mapping_tx, pt),
 "cleaning up replaced tx payload type");
 }

 if (AST_VECTOR_REPLACE(&codecs->payload_mapping_tx, pt, new_type)) {
 ao2_ref(new_type, -1);
 } else if (instance && instance->engine && instance->engine->payload_set) {
 ao2_lock(instance);
 instance->engine->payload_set(instance, pt, new_type->asterisk_format, new_type->format, new_type->rtp_code);
 ao2_unlock(instance);
 }
 } else {
 ao2_ref(new_type, -1);
 }

 break;
 }

 ast_rwlock_unlock(&codecs->codecs_lock);
 ast_rwlock_unlock(&mime_types_lock);

 return (found ? 0 : -2);
}

ast_rtp_codecs_payloads_unset()

void ast_rtp_codecs_payloads_unset	(	struct ast_rtp_codecs *	codecs,
		struct ast_rtp_instance *	instance,
		int	payload
	)

Remove tx payload type mapped information.

Parameters

codecs	The codecs structure to muck with
instance	Optionally the instance that the codecs structure belongs to
payload	Numerical payload to unset

Example usage:

ast_rtp_codecs_payloads_unset(&codecs, NULL, 0);

This clears the payload '0' from the codecs structure. It will be as if it was never set.

Since

1.8

Definition at line 1433 of file rtp_engine.c.

References ao2_cleanup, ao2_lock, ao2_unlock, ast_debug, AST_RTP_MAX_PT, ast_rwlock_unlock, ast_rwlock_wrlock, AST_VECTOR_GET, AST_VECTOR_REPLACE, AST_VECTOR_SIZE, ast_rtp_codecs::codecs_lock, ast_rtp_instance::engine, NULL, ast_rtp_engine::payload_set, and type.

Referenced by process_sdp_a_audio(), and process_sdp_a_video().

{
 struct ast_rtp_payload_type *type;

 if (payload < 0 || payload >= AST_RTP_MAX_PT) {
 return;
 }

 ast_debug(2, "Unsetting payload %d on %p\n", payload, codecs);

 ast_rwlock_wrlock(&codecs->codecs_lock);

 if (payload < AST_VECTOR_SIZE(&codecs->payload_mapping_tx)) {
 type = AST_VECTOR_GET(&codecs->payload_mapping_tx, payload);
 ao2_cleanup(type);
 AST_VECTOR_REPLACE(&codecs->payload_mapping_tx, payload, NULL);
 }

 if (instance && instance->engine && instance->engine->payload_set) {
 ao2_lock(instance);
 instance->engine->payload_set(instance, payload, 0, NULL, 0);
 ao2_unlock(instance);
 }

 ast_rwlock_unlock(&codecs->codecs_lock);
}

ast_rtp_codecs_payloads_xover()

void ast_rtp_codecs_payloads_xover	(	struct ast_rtp_codecs *	src,
		struct ast_rtp_codecs *	dest,
		struct ast_rtp_instance *	instance
	)

Crossover copy the tx payload mapping of src to the rx payload mapping of dest.

Since

14.0.0

Parameters

src	The source codecs structure
dest	The destination codecs structure that the values from src will be copied to
instance	Optionally the instance that the dst codecs structure belongs to

Returns

Nothing

Definition at line 1257 of file rtp_engine.c.

References ao2_lock, ao2_unlock, ast_assert, ast_debug, ast_rwlock_tryrdlock, ast_rwlock_unlock, ast_rwlock_wrlock, AST_VECTOR_GET, AST_VECTOR_SIZE, ast_rtp_payload_type::asterisk_format, ast_rtp_codecs::codecs_lock, ast_rtp_instance::engine, ast_rtp_payload_type::format, ast_rtp_codecs::framing, ast_rtp_engine::payload_set, ast_rtp_payload_type::primary_mapping, ast_rtp_payload_type::rtp_code, rtp_codecs_payload_replace_rx(), and type.

Referenced by ast_rtp_instance_early_bridge_make_compatible(), process_sdp(), set_caps(), and set_incoming_call_offer_cap().

{
 int idx;
 struct ast_rtp_payload_type *type;

 ast_rwlock_wrlock(&dest->codecs_lock);
 if (src != dest) {
 /* Deadlock avoidance because of held write lock. */
 while (ast_rwlock_tryrdlock(&src->codecs_lock)) {
 ast_rwlock_unlock(&dest->codecs_lock);
 sched_yield();
 ast_rwlock_wrlock(&dest->codecs_lock);
 }
 }

 /* Crossover copy payload type tx mapping to rx mapping. */
 for (idx = 0; idx < AST_VECTOR_SIZE(&src->payload_mapping_tx); ++idx) {
 type = AST_VECTOR_GET(&src->payload_mapping_tx, idx);
 if (!type) {
 continue;
 }

 /* All tx mapping elements should have the primary flag set. */
 ast_assert(type->primary_mapping);

 ast_debug(2, "Crossover copying tx to rx payload mapping %d (%p) from %p to %p\n",
 idx, type, src, dest);
 rtp_codecs_payload_replace_rx(dest, idx, type);

 if (instance && instance->engine && instance->engine->payload_set) {
 ao2_lock(instance);
 instance->engine->payload_set(instance, idx, type->asterisk_format, type->format, type->rtp_code);
 ao2_unlock(instance);
 }
 }

 dest->framing = src->framing;

 if (src != dest) {
 ast_rwlock_unlock(&src->codecs_lock);
 }
 ast_rwlock_unlock(&dest->codecs_lock);
}

ast_rtp_codecs_set_framing()

void ast_rtp_codecs_set_framing	(	struct ast_rtp_codecs *	codecs,
		unsigned int	framing
	)

Set the framing used for a set of codecs.

Parameters

codecs	Codecs structure to set framing on
framing	The framing value to set on the codecs

Since

13.0.0

Definition at line 1558 of file rtp_engine.c.

References ast_rwlock_unlock, ast_rwlock_wrlock, ast_rtp_codecs::codecs_lock, and ast_rtp_codecs::framing.

Referenced by add_sdp(), check_peer_ok(), configure_local_rtp(), create_addr_from_peer(), get_codecs(), jingle_enable_video(), jingle_new(), process_sdp(), process_sdp_a_audio(), and start_rtp().

{
 if (!framing) {
 return;
 }

 ast_rwlock_wrlock(&codecs->codecs_lock);
 codecs->framing = framing;
 ast_rwlock_unlock(&codecs->codecs_lock);
}

ast_rtp_dtls_cfg_copy()

void ast_rtp_dtls_cfg_copy	(	const struct ast_rtp_dtls_cfg *	src_cfg,
		struct ast_rtp_dtls_cfg *	dst_cfg
	)

Copy contents of a DTLS configuration structure.

Parameters

src_cfg	source DTLS configuration structure
dst_cfg	destination DTLS configuration structure

Definition at line 3113 of file rtp_engine.c.

References ast_rtp_dtls_cfg_free(), ast_strdup, ast_rtp_dtls_cfg::cafile, ast_rtp_dtls_cfg::capath, ast_rtp_dtls_cfg::certfile, ast_rtp_dtls_cfg::cipher, ast_rtp_dtls_cfg::default_setup, ast_rtp_dtls_cfg::enabled, ast_rtp_dtls_cfg::ephemeral_cert, ast_rtp_dtls_cfg::hash, ast_rtp_dtls_cfg::pvtfile, ast_rtp_dtls_cfg::rekey, ast_rtp_dtls_cfg::suite, and ast_rtp_dtls_cfg::verify.

Referenced by build_peer(), check_peer_ok(), and create_addr_from_peer().

{
 ast_rtp_dtls_cfg_free(dst_cfg); /* Prevent a double-call leaking memory via ast_strdup */

 dst_cfg->enabled = src_cfg->enabled;
 dst_cfg->verify = src_cfg->verify;
 dst_cfg->rekey = src_cfg->rekey;
 dst_cfg->suite = src_cfg->suite;
 dst_cfg->hash = src_cfg->hash;
 dst_cfg->ephemeral_cert = src_cfg->ephemeral_cert;
 dst_cfg->certfile = ast_strdup(src_cfg->certfile);
 dst_cfg->pvtfile = ast_strdup(src_cfg->pvtfile);
 dst_cfg->cipher = ast_strdup(src_cfg->cipher);
 dst_cfg->cafile = ast_strdup(src_cfg->cafile);
 dst_cfg->capath = ast_strdup(src_cfg->capath);
 dst_cfg->default_setup = src_cfg->default_setup;
}

ast_rtp_dtls_cfg_free()

void ast_rtp_dtls_cfg_free

(

struct ast_rtp_dtls_cfg *

dtls_cfg

)

Free contents of a DTLS configuration structure.

Parameters

dtls_cfg

a DTLS configuration structure

Definition at line 3131 of file rtp_engine.c.

References ast_free, ast_rtp_dtls_cfg::cafile, ast_rtp_dtls_cfg::capath, ast_rtp_dtls_cfg::certfile, ast_rtp_dtls_cfg::cipher, NULL, and ast_rtp_dtls_cfg::pvtfile.

Referenced by ast_rtp_dtls_cfg_copy(), build_peer(), media_configuration_destroy(), reload_config(), sip_destroy_peer(), sip_pvt_dtor(), and unload_module().

{
 ast_free(dtls_cfg->certfile);
 dtls_cfg->certfile = NULL;
 ast_free(dtls_cfg->pvtfile);
 dtls_cfg->pvtfile = NULL;
 ast_free(dtls_cfg->cipher);
 dtls_cfg->cipher = NULL;
 ast_free(dtls_cfg->cafile);
 dtls_cfg->cafile = NULL;
 ast_free(dtls_cfg->capath);
 dtls_cfg->capath = NULL;
}

ast_rtp_dtls_cfg_parse()

int ast_rtp_dtls_cfg_parse	(	struct ast_rtp_dtls_cfg *	dtls_cfg,
		const char *	name,
		const char *	value
	)

Parse DTLS related configuration options.

Parameters

dtls_cfg	a DTLS configuration structure
name	name of the configuration option
value	value of the configuration option

Return values

0	if handled
-1	if not handled

Definition at line 3020 of file rtp_engine.c.

References ast_file_is_readable(), ast_free, ast_log, AST_RTP_DTLS_HASH_SHA1, AST_RTP_DTLS_HASH_SHA256, AST_RTP_DTLS_SETUP_ACTIVE, AST_RTP_DTLS_SETUP_ACTPASS, AST_RTP_DTLS_SETUP_PASSIVE, AST_RTP_DTLS_VERIFY_CERTIFICATE, AST_RTP_DTLS_VERIFY_FINGERPRINT, AST_RTP_DTLS_VERIFY_NONE, ast_strdup, ast_strlen_zero, ast_true(), ast_rtp_dtls_cfg::cafile, ast_rtp_dtls_cfg::capath, ast_rtp_dtls_cfg::certfile, ast_rtp_dtls_cfg::cipher, ast_rtp_dtls_cfg::default_setup, ast_rtp_dtls_cfg::enabled, ast_rtp_dtls_cfg::ephemeral_cert, ast_rtp_dtls_cfg::hash, LOG_ERROR, ast_rtp_dtls_cfg::pvtfile, ast_rtp_dtls_cfg::rekey, and ast_rtp_dtls_cfg::verify.

Referenced by build_peer(), dtls_handler(), media_encryption_handler(), and reload_config().

{
 if (!strcasecmp(name, "dtlsenable")) {
 dtls_cfg->enabled = ast_true(value) ? 1 : 0;
 } else if (!strcasecmp(name, "dtlsverify")) {
 if (!strcasecmp(value, "yes")) {
 dtls_cfg->verify = AST_RTP_DTLS_VERIFY_FINGERPRINT | AST_RTP_DTLS_VERIFY_CERTIFICATE;
 } else if (!strcasecmp(value, "fingerprint")) {
 dtls_cfg->verify = AST_RTP_DTLS_VERIFY_FINGERPRINT;
 } else if (!strcasecmp(value, "certificate")) {
 dtls_cfg->verify = AST_RTP_DTLS_VERIFY_CERTIFICATE;
 } else if (!strcasecmp(value, "no")) {
 dtls_cfg->verify = AST_RTP_DTLS_VERIFY_NONE;
 } else {
 return -1;
 }
 } else if (!strcasecmp(name, "dtlsrekey")) {
 if (sscanf(value, "%30u", &dtls_cfg->rekey) != 1) {
 return -1;
 }
 } else if (!strcasecmp(name, "dtlsautogeneratecert")) {
 dtls_cfg->ephemeral_cert = ast_true(value) ? 1 : 0;
 } else if (!strcasecmp(name, "dtlscertfile")) {
 if (!ast_strlen_zero(value) && !ast_file_is_readable(value)) {
 ast_log(LOG_ERROR, "%s file %s does not exist or is not readable\n", name, value);
 return -1;
 }
 ast_free(dtls_cfg->certfile);
 dtls_cfg->certfile = ast_strdup(value);
 } else if (!strcasecmp(name, "dtlsprivatekey")) {
 if (!ast_strlen_zero(value) && !ast_file_is_readable(value)) {
 ast_log(LOG_ERROR, "%s file %s does not exist or is not readable\n", name, value);
 return -1;
 }
 ast_free(dtls_cfg->pvtfile);
 dtls_cfg->pvtfile = ast_strdup(value);
 } else if (!strcasecmp(name, "dtlscipher")) {
 ast_free(dtls_cfg->cipher);
 dtls_cfg->cipher = ast_strdup(value);
 } else if (!strcasecmp(name, "dtlscafile")) {
 if (!ast_strlen_zero(value) && !ast_file_is_readable(value)) {
 ast_log(LOG_ERROR, "%s file %s does not exist or is not readable\n", name, value);
 return -1;
 }
 ast_free(dtls_cfg->cafile);
 dtls_cfg->cafile = ast_strdup(value);
 } else if (!strcasecmp(name, "dtlscapath") || !strcasecmp(name, "dtlscadir")) {
 if (!ast_strlen_zero(value) && !ast_file_is_readable(value)) {
 ast_log(LOG_ERROR, "%s file %s does not exist or is not readable\n", name, value);
 return -1;
 }
 ast_free(dtls_cfg->capath);
 dtls_cfg->capath = ast_strdup(value);
 } else if (!strcasecmp(name, "dtlssetup")) {
 if (!strcasecmp(value, "active")) {
 dtls_cfg->default_setup = AST_RTP_DTLS_SETUP_ACTIVE;
 } else if (!strcasecmp(value, "passive")) {
 dtls_cfg->default_setup = AST_RTP_DTLS_SETUP_PASSIVE;
 } else if (!strcasecmp(value, "actpass")) {
 dtls_cfg->default_setup = AST_RTP_DTLS_SETUP_ACTPASS;
 }
 } else if (!strcasecmp(name, "dtlsfingerprint")) {
 if (!strcasecmp(value, "sha-256")) {
 dtls_cfg->hash = AST_RTP_DTLS_HASH_SHA256;
 } else if (!strcasecmp(value, "sha-1")) {
 dtls_cfg->hash = AST_RTP_DTLS_HASH_SHA1;
 }
 } else {
 return -1;
 }

 return 0;
}

ast_rtp_dtls_cfg_validate()

int ast_rtp_dtls_cfg_validate

(

struct ast_rtp_dtls_cfg *

dtls_cfg

)

Validates DTLS related configuration options.

Parameters

dtls_cfg

a DTLS configuration structure

Return values

0	if valid
-1	if invalid

Definition at line 3094 of file rtp_engine.c.

References ast_log, ast_strlen_zero, ast_rtp_dtls_cfg::cafile, ast_rtp_dtls_cfg::capath, ast_rtp_dtls_cfg::certfile, ast_rtp_dtls_cfg::ephemeral_cert, LOG_ERROR, LOG_NOTICE, and ast_rtp_dtls_cfg::pvtfile.

Referenced by build_peer(), reload_config(), and sip_endpoint_apply_handler().

{
 if (dtls_cfg->ephemeral_cert) {
 if (!ast_strlen_zero(dtls_cfg->certfile)) {
 ast_log(LOG_ERROR, "You cannot request automatically generated certificates"
 " (dtls_auto_generate_cert) and also specify a certificate file"
 " (dtls_cert_file) at the same time\n");
 return -1;
 } else if (!ast_strlen_zero(dtls_cfg->pvtfile)
 || !ast_strlen_zero(dtls_cfg->cafile)
 || !ast_strlen_zero(dtls_cfg->capath)) {
 ast_log(LOG_NOTICE, "dtls_pvt_file, dtls_cafile, and dtls_ca_path are"
 " ignored when dtls_auto_generate_cert is enabled\n");
 }
 }

 return 0;
}

ast_rtp_engine_alloc_payload_type()

struct ast_rtp_payload_type* ast_rtp_engine_alloc_payload_type

(

void

)

Allocation routine for ast_rtp_payload_type.

Return values

NULL	on error
An	ao2 ref counted ast_rtp_payload_type on success.

Note

The ast_rtp_payload_type returned by this function is an ao2 ref counted object.

Definition at line 325 of file rtp_engine.c.

References NULL, and rtp_payload_type_alloc().

Referenced by ast_rtp_codecs_payload_replace_format(), ast_rtp_codecs_payloads_set_rtpmap_type_rate(), and payload_mapping_rx_clear_primary().

{
 return rtp_payload_type_alloc(NULL, 0, 0, 0);
}

ast_rtp_engine_init()

int ast_rtp_engine_init

(

void

)

initializes the rtp engine arrays

Definition at line 3622 of file rtp_engine.c.

References add_static_payload(), ast_debug_category_register(), ast_format_adpcm, ast_format_alaw, ast_format_g719, ast_format_g722, ast_format_g723, ast_format_g726, ast_format_g726_aal2, ast_format_g729, ast_format_gsm, ast_format_h261, ast_format_h263, ast_format_h263p, ast_format_h264, ast_format_h265, ast_format_ilbc, ast_format_jpeg, ast_format_lpc10, ast_format_mp4, ast_format_opus, ast_format_png, ast_format_siren14, ast_format_siren7, ast_format_slin, ast_format_slin12, ast_format_slin16, ast_format_slin192, ast_format_slin24, ast_format_slin32, ast_format_slin44, ast_format_slin48, ast_format_slin96, ast_format_speex, ast_format_speex16, ast_format_speex32, ast_format_t140, ast_format_t140_red, ast_format_ulaw, ast_format_vp8, ast_format_vp9, AST_LOG_CATEGORY_DTLS, AST_LOG_CATEGORY_DTLS_PACKET, AST_LOG_CATEGORY_ICE, AST_LOG_CATEGORY_RTCP, AST_LOG_CATEGORY_RTCP_PACKET, AST_LOG_CATEGORY_RTP, AST_LOG_CATEGORY_RTP_PACKET, ast_register_cleanup(), AST_RTP_CISCO_DTMF, AST_RTP_CN, AST_RTP_DTMF, ast_rtp_rtcp_received_type(), ast_rtp_rtcp_sent_type(), ast_rwlock_init, debug_category_dtls_id, debug_category_dtls_packet_id, debug_category_ice_id, debug_category_rtcp_id, debug_category_rtcp_packet_id, debug_category_rtp_id, debug_category_rtp_packet_id, NULL, rtp_engine_shutdown(), set_next_mime_type(), STASIS_MESSAGE_TYPE_INIT, and stasis_topic_create().

Referenced by asterisk_daemon().

{
 ast_rwlock_init(&mime_types_lock);
 ast_rwlock_init(&static_RTP_PT_lock);

 rtp_topic = stasis_topic_create("rtp:all");
 if (!rtp_topic) {
 return -1;
 }
 STASIS_MESSAGE_TYPE_INIT(ast_rtp_rtcp_sent_type);
 STASIS_MESSAGE_TYPE_INIT(ast_rtp_rtcp_received_type);
 ast_register_cleanup(rtp_engine_shutdown);

 /* Define all the RTP mime types available */
 set_next_mime_type(ast_format_g723, 0, "audio", "G723", 8000);
 set_next_mime_type(ast_format_gsm, 0, "audio", "GSM", 8000);
 set_next_mime_type(ast_format_ulaw, 0, "audio", "PCMU", 8000);
 set_next_mime_type(ast_format_ulaw, 0, "audio", "G711U", 8000);
 set_next_mime_type(ast_format_alaw, 0, "audio", "PCMA", 8000);
 set_next_mime_type(ast_format_alaw, 0, "audio", "G711A", 8000);
 set_next_mime_type(ast_format_g726, 0, "audio", "G726-32", 8000);
 set_next_mime_type(ast_format_adpcm, 0, "audio", "DVI4", 8000);
 set_next_mime_type(ast_format_slin, 0, "audio", "L16", 8000);
 set_next_mime_type(ast_format_slin16, 0, "audio", "L16", 16000);
 set_next_mime_type(ast_format_slin16, 0, "audio", "L16-256", 16000);
 set_next_mime_type(ast_format_slin12, 0, "audio", "L16", 12000);
 set_next_mime_type(ast_format_slin24, 0, "audio", "L16", 24000);
 set_next_mime_type(ast_format_slin32, 0, "audio", "L16", 32000);
 set_next_mime_type(ast_format_slin44, 0, "audio", "L16", 44000);
 set_next_mime_type(ast_format_slin48, 0, "audio", "L16", 48000);
 set_next_mime_type(ast_format_slin96, 0, "audio", "L16", 96000);
 set_next_mime_type(ast_format_slin192, 0, "audio", "L16", 192000);
 set_next_mime_type(ast_format_lpc10, 0, "audio", "LPC", 8000);
 set_next_mime_type(ast_format_g729, 0, "audio", "G729", 8000);
 set_next_mime_type(ast_format_g729, 0, "audio", "G729A", 8000);
 set_next_mime_type(ast_format_g729, 0, "audio", "G.729", 8000);
 set_next_mime_type(ast_format_speex, 0, "audio", "speex", 8000);
 set_next_mime_type(ast_format_speex16, 0, "audio", "speex", 16000);
 set_next_mime_type(ast_format_speex32, 0, "audio", "speex", 32000);
 set_next_mime_type(ast_format_ilbc, 0, "audio", "iLBC", 8000);
 /* this is the sample rate listed in the RTP profile for the G.722 codec, *NOT* the actual sample rate of the media stream */
 set_next_mime_type(ast_format_g722, 0, "audio", "G722", 8000);
 set_next_mime_type(ast_format_g726_aal2, 0, "audio", "AAL2-G726-32", 8000);
 set_next_mime_type(NULL, AST_RTP_DTMF, "audio", "telephone-event", 8000);
 set_next_mime_type(NULL, AST_RTP_CISCO_DTMF, "audio", "cisco-telephone-event", 8000);
 set_next_mime_type(NULL, AST_RTP_CN, "audio", "CN", 8000);
 set_next_mime_type(ast_format_jpeg, 0, "video", "JPEG", 90000);
 set_next_mime_type(ast_format_png, 0, "video", "PNG", 90000);
 set_next_mime_type(ast_format_h261, 0, "video", "H261", 90000);
 set_next_mime_type(ast_format_h263, 0, "video", "H263", 90000);
 set_next_mime_type(ast_format_h263p, 0, "video", "h263-1998", 90000);
 set_next_mime_type(ast_format_h264, 0, "video", "H264", 90000);
 set_next_mime_type(ast_format_h265, 0, "video", "H265", 90000);
 set_next_mime_type(ast_format_mp4, 0, "video", "MP4V-ES", 90000);
 set_next_mime_type(ast_format_t140_red, 0, "text", "RED", 1000);
 set_next_mime_type(ast_format_t140, 0, "text", "T140", 1000);
 set_next_mime_type(ast_format_siren7, 0, "audio", "G7221", 16000);
 set_next_mime_type(ast_format_siren14, 0, "audio", "G7221", 32000);
 set_next_mime_type(ast_format_g719, 0, "audio", "G719", 48000);
 /* Opus, VP8, and VP9 */
 set_next_mime_type(ast_format_opus, 0, "audio", "opus", 48000);
 set_next_mime_type(ast_format_vp8, 0, "video", "VP8", 90000);
 set_next_mime_type(ast_format_vp9, 0, "video", "VP9", 90000);

 /* Define the static rtp payload mappings */
 add_static_payload(0, ast_format_ulaw, 0);
 #ifdef USE_DEPRECATED_G726
 add_static_payload(2, ast_format_g726, 0);/* Technically this is G.721, but if Cisco can do it, so can we... */
 #endif
 add_static_payload(3, ast_format_gsm, 0);
 add_static_payload(4, ast_format_g723, 0);
 add_static_payload(5, ast_format_adpcm, 0);/* 8 kHz */
 add_static_payload(6, ast_format_adpcm, 0); /* 16 kHz */
 add_static_payload(7, ast_format_lpc10, 0);
 add_static_payload(8, ast_format_alaw, 0);
 add_static_payload(9, ast_format_g722, 0);
 add_static_payload(10, ast_format_slin, 0); /* 2 channels */
 add_static_payload(11, ast_format_slin, 0); /* 1 channel */
 add_static_payload(13, NULL, AST_RTP_CN);
 add_static_payload(16, ast_format_adpcm, 0); /* 11.025 kHz */
 add_static_payload(17, ast_format_adpcm, 0); /* 22.050 kHz */
 add_static_payload(18, ast_format_g729, 0);
 add_static_payload(19, NULL, AST_RTP_CN); /* Also used for CN */
 add_static_payload(26, ast_format_jpeg, 0);
 add_static_payload(31, ast_format_h261, 0);
 add_static_payload(34, ast_format_h263, 0);

 /*
 * Dynamic payload types - Even when dynamically assigning them we'll fall
 * back to using the statically declared values as the default number.
 */
 add_static_payload(96, ast_format_slin192, 0);
 add_static_payload(97, ast_format_ilbc, 0);

 add_static_payload(99, ast_format_h264, 0);
 add_static_payload(100, ast_format_vp8, 0);
 add_static_payload(101, NULL, AST_RTP_DTMF);
 add_static_payload(102, ast_format_siren7, 0);
 add_static_payload(103, ast_format_h263p, 0);
 add_static_payload(104, ast_format_mp4, 0);
 add_static_payload(105, ast_format_t140_red, 0); /* Real time text chat (with redundancy encoding) */
 add_static_payload(106, ast_format_t140, 0); /* Real time text chat */
 add_static_payload(107, ast_format_opus, 0);
 add_static_payload(108, ast_format_vp9, 0);
 add_static_payload(109, ast_format_h265, 0);

 add_static_payload(110, ast_format_speex, 0);
 add_static_payload(111, ast_format_g726, 0);
 add_static_payload(112, ast_format_g726_aal2, 0);

 add_static_payload(115, ast_format_siren14, 0);
 add_static_payload(116, ast_format_g719, 0);
 add_static_payload(117, ast_format_speex16, 0);
 add_static_payload(118, ast_format_slin16, 0); /* 16 Khz signed linear */
 add_static_payload(119, ast_format_speex32, 0);

 add_static_payload(121, NULL, AST_RTP_CISCO_DTMF); /* Must be type 121 */
 add_static_payload(122, ast_format_slin12, 0);
 add_static_payload(123, ast_format_slin24, 0);
 add_static_payload(124, ast_format_slin32, 0);
 add_static_payload(125, ast_format_slin44, 0);
 add_static_payload(126, ast_format_slin48, 0);
 add_static_payload(127, ast_format_slin96, 0);
 /* payload types above 127 are not valid */

 debug_category_rtp_id = ast_debug_category_register(AST_LOG_CATEGORY_RTP);
 debug_category_rtp_packet_id = ast_debug_category_register(AST_LOG_CATEGORY_RTP_PACKET);
 debug_category_rtcp_id = ast_debug_category_register(AST_LOG_CATEGORY_RTCP);
 debug_category_rtcp_packet_id = ast_debug_category_register(AST_LOG_CATEGORY_RTCP_PACKET);
 debug_category_dtls_id = ast_debug_category_register(AST_LOG_CATEGORY_DTLS);
 debug_category_dtls_packet_id = ast_debug_category_register(AST_LOG_CATEGORY_DTLS_PACKET);
 debug_category_ice_id = ast_debug_category_register(AST_LOG_CATEGORY_ICE);

 return 0;
}

ast_rtp_engine_load_format()

int ast_rtp_engine_load_format

(

struct ast_format *

format

)

Custom formats declared in codecs.conf at startup must be communicated to the rtp_engine so their mime type can payload number can be initialized.

Definition at line 3229 of file rtp_engine.c.

References add_static_payload(), ast_codec_media_type2str(), ast_format_get_codec_name(), ast_format_get_sample_rate(), ast_format_get_type(), ast_str_to_upper(), ast_strdupa, and set_next_mime_type().

Referenced by load_module().

{
 char *codec_name = ast_strdupa(ast_format_get_codec_name(format));

 codec_name = ast_str_to_upper(codec_name);

 set_next_mime_type(format,
 0,
 ast_codec_media_type2str(ast_format_get_type(format)),
 codec_name,
 ast_format_get_sample_rate(format));
 add_static_payload(-1, format, 0);

 return 0;
}

ast_rtp_engine_register2()

int ast_rtp_engine_register2	(	struct ast_rtp_engine *	engine,
		struct ast_module *	module
	)

Register an RTP engine.

Parameters

engine	Structure of the RTP engine to register
module	Module that the RTP engine is part of

Return values

0	success
-1	failure

Example usage:

ast_rtp_engine_register2(&example_rtp_engine, NULL);

This registers the RTP engine declared as example_rtp_engine with the RTP engine core, but does not associate a module with it.

Note

It is recommended that you use the ast_rtp_engine_register macro so that the module is associated with the RTP engine and use counting is performed.

Since

1.8

Definition at line 330 of file rtp_engine.c.

References ast_log, AST_RWLIST_INSERT_TAIL, AST_RWLIST_TRAVERSE, AST_RWLIST_UNLOCK, AST_RWLIST_WRLOCK, ast_strlen_zero, ast_verb, ast_rtp_engine::destroy, LOG_WARNING, ast_rtp_engine::mod, ast_rtp_engine::name, ast_rtp_engine::new, ast_rtp_engine::read, and ast_rtp_engine::write.

{
 struct ast_rtp_engine *current_engine;

 /* Perform a sanity check on the engine structure to make sure it has the basics */
 if (ast_strlen_zero(engine->name) || !engine->new || !engine->destroy || !engine->write || !engine->read) {
 ast_log(LOG_WARNING, "RTP Engine '%s' failed sanity check so it was not registered.\n", !ast_strlen_zero(engine->name) ? engine->name : "Unknown");
 return -1;
 }

 /* Link owner module to the RTP engine for reference counting purposes */
 engine->mod = module;

 AST_RWLIST_WRLOCK(&engines);

 /* Ensure that no two modules with the same name are registered at the same time */
 AST_RWLIST_TRAVERSE(&engines, current_engine, entry) {
 if (!strcmp(current_engine->name, engine->name)) {
 ast_log(LOG_WARNING, "An RTP engine with the name '%s' has already been registered.\n", engine->name);
 AST_RWLIST_UNLOCK(&engines);
 return -1;
 }
 }

 /* The engine survived our critique. Off to the list it goes to be used */
 AST_RWLIST_INSERT_TAIL(&engines, engine, entry);

 AST_RWLIST_UNLOCK(&engines);

 ast_verb(2, "Registered RTP engine '%s'\n", engine->name);

 return 0;
}

ast_rtp_engine_register_srtp()

int ast_rtp_engine_register_srtp	(	struct ast_srtp_res *	srtp_res,
		struct ast_srtp_policy_res *	policy_res
	)

Definition at line 2710 of file rtp_engine.c.

References policy_res, and srtp_res.

Referenced by res_srtp_init().

{
 if (res_srtp || res_srtp_policy) {
 return -1;
 }
 if (!srtp_res || !policy_res) {
 return -1;
 }

 res_srtp = srtp_res;
 res_srtp_policy = policy_res;

 return 0;
}

ast_rtp_engine_srtp_is_registered()

int ast_rtp_engine_srtp_is_registered

(

void

)

Definition at line 2731 of file rtp_engine.c.

References res_srtp_policy.

Referenced by ast_sdp_srtp_alloc(), and dialog_initialize_dtls_srtp().

{
 return res_srtp && res_srtp_policy;
}

ast_rtp_engine_unload_format()

int ast_rtp_engine_unload_format

(

struct ast_format *

format

)

Formats requiring the use of a format attribute interface must have that interface registered in order for the rtp engine to handle it correctly. If an attribute interface is unloaded, this function must be called to notify the rtp_engine.

Definition at line 3245 of file rtp_engine.c.

References ao2_ref, ast_format_cmp(), AST_FORMAT_CMP_EQUAL, AST_RTP_MAX_PT, ast_rtp_mime_types, ast_rwlock_unlock, ast_rwlock_wrlock, mime_types_len, NULL, and rtp_engine_mime_type_cleanup().

Referenced by unload_module().

{
 int x;
 int y = 0;

 ast_rwlock_wrlock(&static_RTP_PT_lock);
 /* remove everything pertaining to this format id from the lists */
 for (x = 0; x < AST_RTP_MAX_PT; x++) {
 if (static_RTP_PT[x]
 && ast_format_cmp(static_RTP_PT[x]->format, format) == AST_FORMAT_CMP_EQUAL) {
 ao2_ref(static_RTP_PT[x], -1);
 static_RTP_PT[x] = NULL;
 }
 }
 ast_rwlock_unlock(&static_RTP_PT_lock);

 ast_rwlock_wrlock(&mime_types_lock);
 /* rebuild the list skipping the items matching this id */
 for (x = 0; x < mime_types_len; x++) {
 if (ast_format_cmp(ast_rtp_mime_types[x].payload_type.format, format) == AST_FORMAT_CMP_EQUAL) {
 rtp_engine_mime_type_cleanup(x);
 continue;
 }
 if (x != y) {
 ast_rtp_mime_types[y] = ast_rtp_mime_types[x];
 }
 y++;
 }
 mime_types_len = y;
 ast_rwlock_unlock(&mime_types_lock);
 return 0;
}

ast_rtp_engine_unregister()

int ast_rtp_engine_unregister

(

struct ast_rtp_engine *

engine

)

Unregister an RTP engine.

Parameters

engine

Structure of the RTP engine to unregister

Return values

0	success
-1	failure

Example usage:

ast_rtp_engine_unregister(&example_rtp_engine);

This unregisters the RTP engine declared as example_rtp_engine from the RTP engine core. If a module reference was provided when it was registered then this will only be called once the RTP engine is no longer in use.

Since

1.8

Definition at line 364 of file rtp_engine.c.

References AST_RWLIST_REMOVE, AST_RWLIST_UNLOCK, AST_RWLIST_WRLOCK, ast_verb, ast_rtp_engine::name, and NULL.

Referenced by AST_TEST_DEFINE(), load_module(), and unload_module().

{
 struct ast_rtp_engine *current_engine = NULL;

 AST_RWLIST_WRLOCK(&engines);

 if ((current_engine = AST_RWLIST_REMOVE(&engines, engine, entry))) {
 ast_verb(2, "Unregistered RTP engine '%s'\n", engine->name);
 }

 AST_RWLIST_UNLOCK(&engines);

 return current_engine ? 0 : -1;
}

ast_rtp_engine_unregister_srtp()

void ast_rtp_engine_unregister_srtp

(

void

)

Definition at line 2725 of file rtp_engine.c.

References NULL.

Referenced by res_srtp_shutdown().

{
 res_srtp = NULL;
 res_srtp_policy = NULL;
}

ast_rtp_glue_register2()

int ast_rtp_glue_register2	(	struct ast_rtp_glue *	glue,
		struct ast_module *	module
	)

Register RTP glue.

Parameters

glue	The glue to register
module	Module that the RTP glue is part of

Return values

0	success
-1	failure

Example usage:

ast_rtp_glue_register2(&example_rtp_glue, NULL);

This registers the RTP glue declared as example_rtp_glue with the RTP engine core, but does not associate a module with it.

Note

It is recommended that you use the ast_rtp_glue_register macro so that the module is associated with the RTP glue and use counting is performed.

Since

1.8

Definition at line 379 of file rtp_engine.c.

References ast_log, AST_RWLIST_INSERT_TAIL, AST_RWLIST_TRAVERSE, AST_RWLIST_UNLOCK, AST_RWLIST_WRLOCK, ast_strlen_zero, ast_verb, LOG_WARNING, ast_rtp_glue::mod, NULL, and ast_rtp_glue::type.

{
 struct ast_rtp_glue *current_glue = NULL;

 if (ast_strlen_zero(glue->type)) {
 return -1;
 }

 glue->mod = module;

 AST_RWLIST_WRLOCK(&glues);

 AST_RWLIST_TRAVERSE(&glues, current_glue, entry) {
 if (!strcasecmp(current_glue->type, glue->type)) {
 ast_log(LOG_WARNING, "RTP glue with the name '%s' has already been registered.\n", glue->type);
 AST_RWLIST_UNLOCK(&glues);
 return -1;
 }
 }

 AST_RWLIST_INSERT_TAIL(&glues, glue, entry);

 AST_RWLIST_UNLOCK(&glues);

 ast_verb(2, "Registered RTP glue '%s'\n", glue->type);

 return 0;
}

ast_rtp_glue_unregister()

int ast_rtp_glue_unregister

(

struct ast_rtp_glue *

glue

)

Unregister RTP glue.

Parameters

glue	The glue to unregister

Return values

0	success
-1	failure

Example usage:

ast_rtp_glue_unregister(&example_rtp_glue);

This unregisters the RTP glue declared as example_rtp_gkue from the RTP engine core. If a module reference was provided when it was registered then this will only be called once the RTP engine is no longer in use.

Since

1.8

Definition at line 408 of file rtp_engine.c.

References AST_RWLIST_REMOVE, AST_RWLIST_UNLOCK, AST_RWLIST_WRLOCK, ast_verb, NULL, and ast_rtp_glue::type.

Referenced by load_module(), and unload_module().

{
 struct ast_rtp_glue *current_glue = NULL;

 AST_RWLIST_WRLOCK(&glues);

 if ((current_glue = AST_RWLIST_REMOVE(&glues, glue, entry))) {
 ast_verb(2, "Unregistered RTP glue '%s'\n", glue->type);
 }

 AST_RWLIST_UNLOCK(&glues);

 return current_glue ? 0 : -1;
}

ast_rtp_instance_activate()

int ast_rtp_instance_activate

(

struct ast_rtp_instance *

instance

)

Indicate to the RTP engine that packets are now expected to be sent/received on the RTP instance.

Parameters

instance

The RTP instance

Return values

0	success
-1	failure

Example usage:

ast_rtp_instance_activate(instance);

This tells the underlying RTP engine of instance that packets will now flow.

Since

1.8

Definition at line 2647 of file rtp_engine.c.

References ast_rtp_engine::activate, ao2_lock, ao2_unlock, and ast_rtp_instance::engine.

Referenced by apply_negotiated_sdp_stream(), handle_response_invite(), rtp_call(), test_init_rtp_instances(), and transmit_response_with_sdp().

{
 int res;

 if (instance->engine->activate) {
 ao2_lock(instance);
 res = instance->engine->activate(instance);
 ao2_unlock(instance);
 } else {
 res = 0;
 }
 return res;
}

ast_rtp_instance_add_srtp_policy()

int ast_rtp_instance_add_srtp_policy	(	struct ast_rtp_instance *	instance,
		struct ast_srtp_policy *	remote_policy,
		struct ast_srtp_policy *	local_policy,
		int	rtcp
	)

Add or replace the SRTP policies for the given RTP instance.

Parameters

instance	the RTP instance
remote_policy	the remote endpoint's policy
local_policy	our policy for this RTP instance's remote endpoint
rtcp	1 for dedicated RTCP policies

Return values

0	Success
non-zero	Failure

Note

If no remote policy is provided any existing SRTP policies are left and the new local policy is added

Definition at line 2736 of file rtp_engine.c.

References ast_srtp_res::add_stream, ao2_lock, ao2_unlock, ast_srtp_res::create, ast_srtp_res::replace, ast_rtp_instance::rtcp_srtp, and ast_rtp_instance::srtp.

Referenced by crypto_activate(), and rtcp_debug_test_addr().

{
 int res = 0;
 struct ast_srtp **srtp;

 if (!res_srtp) {
 return -1;
 }

 ao2_lock(instance);

 srtp = rtcp ? &instance->rtcp_srtp : &instance->srtp;

 if (!*srtp) {
 res = res_srtp->create(srtp, instance, remote_policy);
 } else if (remote_policy) {
 res = res_srtp->replace(srtp, instance, remote_policy);
 }
 if (!res) {
 res = res_srtp->add_stream(*srtp, local_policy);
 }

 ao2_unlock(instance);

 return res;
}

ast_rtp_instance_available_formats()

void ast_rtp_instance_available_formats	(	struct ast_rtp_instance *	instance,
		struct ast_format_cap *	to_endpoint,
		struct ast_format_cap *	to_asterisk,
		struct ast_format_cap *	result
	)

Request the formats that can be transcoded.

Parameters

instance	The RTP instance
to_endpoint	Formats being sent/received towards the endpoint
to_asterisk	Formats being sent/received towards Asterisk
result	capabilities structure to store and return supported formats in.

Example usage:

ast_rtp_instance_available_formats(instance, to_capabilities, from_capabilities, result_capabilities);

This sees if it is possible to have ulaw communicated to the endpoint but signed linear received into Asterisk.

Since

1.8

Definition at line 2633 of file rtp_engine.c.

References ao2_lock, ao2_unlock, ast_format_cap_count(), ast_translate_available_formats(), ast_rtp_engine::available_formats, and ast_rtp_instance::engine.

Referenced by sip_call().

{
 if (instance->engine->available_formats) {
 ao2_lock(instance);
 instance->engine->available_formats(instance, to_endpoint, to_asterisk, result);
 ao2_unlock(instance);
 if (ast_format_cap_count(result)) {
 return;
 }
 }

 ast_translate_available_formats(to_endpoint, to_asterisk, result);
}

ast_rtp_instance_bundle()

int ast_rtp_instance_bundle	(	struct ast_rtp_instance *	child,
		struct ast_rtp_instance *	parent
	)

Request that an RTP instance be bundled with another.

Since

15.0.0

Parameters

child	The child RTP instance
parent	The parent RTP instance the child should be bundled with

Return values

0	success
-1	failure

Definition at line 3804 of file rtp_engine.c.

References ao2_lock, ao2_unlock, ast_rtp_engine::bundle, and ast_rtp_instance::engine.

Referenced by apply_negotiated_sdp_stream(), and negotiate_incoming_sdp_stream().

{
 int res = -1;

 if (parent && (child->engine != parent->engine)) {
 return -1;
 }

 ao2_lock(child);
 if (child->engine->bundle) {
 res = child->engine->bundle(child, parent);
 }
 ao2_unlock(child);

 return res;
}

ast_rtp_instance_change_source()

void ast_rtp_instance_change_source

(

struct ast_rtp_instance *

instance

)

Indicate a new source of audio has dropped in and the ssrc should change.

Parameters

instance

Instance that the new media source is feeding into

Example usage:

ast_rtp_instance_change_source(instance);

This indicates that the source of media that is feeding the instance pointed to by instance has changed and that the marker bit should be set and the SSRC updated.

Since

1.8

Definition at line 2160 of file rtp_engine.c.

References ao2_lock, ao2_unlock, ast_rtp_engine::change_source, and ast_rtp_instance::engine.

Referenced by create_outgoing_sdp_stream(), jingle_indicate(), mgcp_indicate(), ooh323_indicate(), sip_indicate(), skinny_indicate(), and unistim_indicate().

{
 if (instance->engine->change_source) {
 ao2_lock(instance);
 instance->engine->change_source(instance);
 ao2_unlock(instance);
 }
}

ast_rtp_instance_destroy()

int ast_rtp_instance_destroy

(

struct ast_rtp_instance *

instance

)

Destroy an RTP instance.

Parameters

instance

The RTP instance to destroy

Return values

0	success
-1	failure

Example usage:

ast_rtp_instance_destroy(instance);

This destroys the RTP instance pointed to by instance. Once this function returns instance no longer points to valid memory and may not be used again.

Since

1.8

Definition at line 458 of file rtp_engine.c.

References ao2_cleanup.

Referenced by AST_TEST_DEFINE(), destroy_endpoint(), destroy_rtp(), dialog_clean_rtp(), jingle_session_destructor(), mgcp_hangup(), multicast_rtp_request(), ooh323_destroy(), rtp_hangup(), sip_new(), start_rtp(), stream_destroy(), unalloc_sub(), unicast_rtp_request(), and unistim_hangup_clean().

{
 ao2_cleanup(instance);

 return 0;
}

ast_rtp_instance_dtmf_begin()

int ast_rtp_instance_dtmf_begin	(	struct ast_rtp_instance *	instance,
		char	digit
	)

Begin sending a DTMF digit.

Parameters

instance	The RTP instance to send the DTMF on
digit	What DTMF digit to send

Return values

0	success
-1	failure

Example usage:

ast_rtp_instance_dtmf_begin(instance, '1');

This starts sending the DTMF '1' on the RTP instance pointed to by instance. It will continue being sent until it is ended.

Since

1.8

Definition at line 2081 of file rtp_engine.c.

References ao2_lock, ao2_unlock, ast_rtp_engine::dtmf_begin, and ast_rtp_instance::engine.

Referenced by chan_pjsip_digit_begin(), jingle_digit_begin(), mgcp_senddigit_begin(), ooh323_digit_begin(), and sip_senddigit_begin().

{
 int res;

 if (instance->engine->dtmf_begin) {
 ao2_lock(instance);
 res = instance->engine->dtmf_begin(instance, digit);
 ao2_unlock(instance);
 } else {
 res = -1;
 }
 return res;
}

ast_rtp_instance_dtmf_end()

int ast_rtp_instance_dtmf_end	(	struct ast_rtp_instance *	instance,
		char	digit
	)

Stop sending a DTMF digit.

Parameters

instance	The RTP instance to stop the DTMF on
digit	What DTMF digit to stop

Return values

0	success
-1	failure

Example usage:

ast_rtp_instance_dtmf_end(instance, '1');

This stops sending the DTMF '1' on the RTP instance pointed to by instance.

Since

1.8

Definition at line 2095 of file rtp_engine.c.

References ao2_lock, ao2_unlock, ast_rtp_engine::dtmf_end, and ast_rtp_instance::engine.

Referenced by mgcp_senddigit_end(), and ooh323_digit_end().

{
 int res;

 if (instance->engine->dtmf_end) {
 ao2_lock(instance);
 res = instance->engine->dtmf_end(instance, digit);
 ao2_unlock(instance);
 } else {
 res = -1;
 }
 return res;
}

ast_rtp_instance_dtmf_end_with_duration()

int ast_rtp_instance_dtmf_end_with_duration	(	struct ast_rtp_instance *	instance,
		char	digit,
		unsigned int	duration
	)

Definition at line 2109 of file rtp_engine.c.

References ao2_lock, ao2_unlock, ast_rtp_engine::dtmf_end_with_duration, and ast_rtp_instance::engine.

Referenced by chan_pjsip_digit_end(), jingle_digit_end(), and sip_senddigit_end().

{
 int res;

 if (instance->engine->dtmf_end_with_duration) {
 ao2_lock(instance);
 res = instance->engine->dtmf_end_with_duration(instance, digit, duration);
 ao2_unlock(instance);
 } else {
 res = -1;
 }
 return res;
}

ast_rtp_instance_dtmf_mode_get()

enum ast_rtp_dtmf_mode ast_rtp_instance_dtmf_mode_get

(

struct ast_rtp_instance *

instance

)

Get the DTMF mode of an RTP instance.

Parameters

instance

The RTP instance to get the DTMF mode of

Return values

DTMF

mode

Example usage:

enum ast_rtp_dtmf_mode dtmf_mode = ast_rtp_instance_dtmf_mode_get(instance);

This gets the DTMF mode set on the RTP instance pointed to by 'instance'.

Since

1.8

Definition at line 2137 of file rtp_engine.c.

References ao2_lock, ao2_unlock, ast_rtp_engine::dtmf_mode_get, and ast_rtp_instance::engine.

Referenced by chan_pjsip_digit_begin(), chan_pjsip_digit_end(), native_rtp_bridge_compatible_check(), pjsip_acf_dtmf_mode_write(), and set_caps().

{
 int res;

 if (instance->engine->dtmf_mode_get) {
 ao2_lock(instance);
 res = instance->engine->dtmf_mode_get(instance);
 ao2_unlock(instance);
 } else {
 res = 0;
 }
 return res;
}

ast_rtp_instance_dtmf_mode_set()

int ast_rtp_instance_dtmf_mode_set	(	struct ast_rtp_instance *	instance,
		enum ast_rtp_dtmf_mode	dtmf_mode
	)

Set the DTMF mode that should be used.

Parameters

instance	the RTP instance to set DTMF mode on
dtmf_mode	The DTMF mode that is in use

Return values

0	success
-1	failure

Example usage:

ast_rtp_instance_dtmf_mode_set(instance, AST_RTP_DTMF_MODE_RFC2833);

This sets the RTP instance to use RFC2833 for DTMF transmission and receiving.

Since

1.8

Definition at line 2123 of file rtp_engine.c.

References ao2_lock, ao2_unlock, ast_rtp_engine::dtmf_mode_set, and ast_rtp_instance::engine.

Referenced by create_rtp(), enable_dsp_detect(), get_codecs(), pjsip_acf_dtmf_mode_write(), and sip_new().

{
 int res;

 if (instance->engine->dtmf_mode_set) {
 ao2_lock(instance);
 res = instance->engine->dtmf_mode_set(instance, dtmf_mode);
 ao2_unlock(instance);
 } else {
 res = -1;
 }
 return res;
}

ast_rtp_instance_early_bridge()

int ast_rtp_instance_early_bridge	(	struct ast_channel *	c0,
		struct ast_channel *	c1
	)

Early bridge two channels that use RTP instances.

Parameters

c0	First channel part of the bridge
c1	Second channel part of the bridge

Return values

0	success
-1	failure

Note

This should only be used by channel drivers in their technology declaration.

Since

1.8

Definition at line 2337 of file rtp_engine.c.

References ao2_cleanup, ast_channel_lock_both, ast_channel_name(), ast_channel_tech(), ast_channel_unlock, ast_debug, ast_format_cap_alloc, AST_FORMAT_CAP_FLAG_DEFAULT, ast_format_cap_iscompatible(), ast_log, AST_RTP_GLUE_RESULT_FORBID, AST_RTP_GLUE_RESULT_REMOTE, ast_rtp_instance_get_glue(), done, ast_rtp_glue::get_codec, ast_rtp_glue::get_rtp_info, ast_rtp_glue::get_vrtp_info, LOG_WARNING, NULL, type, unref_instance_cond(), and ast_rtp_glue::update_peer.

{
 struct ast_rtp_instance *instance0 = NULL, *instance1 = NULL,
 *vinstance0 = NULL, *vinstance1 = NULL,
 *tinstance0 = NULL, *tinstance1 = NULL;
 struct ast_rtp_glue *glue0, *glue1;
 enum ast_rtp_glue_result audio_glue0_res = AST_RTP_GLUE_RESULT_FORBID, video_glue0_res = AST_RTP_GLUE_RESULT_FORBID;
 enum ast_rtp_glue_result audio_glue1_res = AST_RTP_GLUE_RESULT_FORBID, video_glue1_res = AST_RTP_GLUE_RESULT_FORBID;
 struct ast_format_cap *cap0 = ast_format_cap_alloc(AST_FORMAT_CAP_FLAG_DEFAULT);
 struct ast_format_cap *cap1 = ast_format_cap_alloc(AST_FORMAT_CAP_FLAG_DEFAULT);

 /* If there is no second channel just immediately bail out, we are of no use in that scenario */
 if (!c1 || !cap1 || !cap0) {
 ao2_cleanup(cap0);
 ao2_cleanup(cap1);
 return -1;
 }

 /* Lock both channels so we can look for the glue that binds them together */
 ast_channel_lock_both(c0, c1);

 /* Grab glue that binds each channel to something using the RTP engine */
 if (!(glue0 = ast_rtp_instance_get_glue(ast_channel_tech(c0)->type)) || !(glue1 = ast_rtp_instance_get_glue(ast_channel_tech(c1)->type))) {
 ast_log(LOG_WARNING, "Can't find native functions for channel '%s'\n", glue0 ? ast_channel_name(c1) : ast_channel_name(c0));
 goto done;
 }

 audio_glue0_res = glue0->get_rtp_info(c0, &instance0);
 video_glue0_res = glue0->get_vrtp_info ? glue0->get_vrtp_info(c0, &vinstance0) : AST_RTP_GLUE_RESULT_FORBID;

 audio_glue1_res = glue1->get_rtp_info(c1, &instance1);
 video_glue1_res = glue1->get_vrtp_info ? glue1->get_vrtp_info(c1, &vinstance1) : AST_RTP_GLUE_RESULT_FORBID;

 /* If we are carrying video, and both sides are not going to remotely bridge... fail the native bridge */
 if (video_glue0_res != AST_RTP_GLUE_RESULT_FORBID && (audio_glue0_res != AST_RTP_GLUE_RESULT_REMOTE || video_glue0_res != AST_RTP_GLUE_RESULT_REMOTE)) {
 audio_glue0_res = AST_RTP_GLUE_RESULT_FORBID;
 }
 if (video_glue1_res != AST_RTP_GLUE_RESULT_FORBID && (audio_glue1_res != AST_RTP_GLUE_RESULT_REMOTE || video_glue1_res != AST_RTP_GLUE_RESULT_REMOTE)) {
 audio_glue1_res = AST_RTP_GLUE_RESULT_FORBID;
 }
 if (audio_glue0_res == AST_RTP_GLUE_RESULT_REMOTE && (video_glue0_res == AST_RTP_GLUE_RESULT_FORBID || video_glue0_res == AST_RTP_GLUE_RESULT_REMOTE) && glue0->get_codec) {
 glue0->get_codec(c0, cap0);
 }
 if (audio_glue1_res == AST_RTP_GLUE_RESULT_REMOTE && (video_glue1_res == AST_RTP_GLUE_RESULT_FORBID || video_glue1_res == AST_RTP_GLUE_RESULT_REMOTE) && glue1->get_codec) {
 glue1->get_codec(c1, cap1);
 }

 /* If any sort of bridge is forbidden just completely bail out and go back to generic bridging */
 if (audio_glue0_res != AST_RTP_GLUE_RESULT_REMOTE || audio_glue1_res != AST_RTP_GLUE_RESULT_REMOTE) {
 goto done;
 }

 /* Make sure we have matching codecs */
 if (!ast_format_cap_iscompatible(cap0, cap1)) {
 goto done;
 }

 /* Bridge media early */
 if (glue0->update_peer(c0, instance1, vinstance1, tinstance1, cap1, 0)) {
 ast_log(LOG_WARNING, "Channel '%s' failed to setup early bridge to '%s'\n", ast_channel_name(c0), c1 ? ast_channel_name(c1) : "<unspecified>");
 }

done:
 ast_channel_unlock(c0);
 ast_channel_unlock(c1);

 ao2_cleanup(cap0);
 ao2_cleanup(cap1);

 unref_instance_cond(&instance0);
 unref_instance_cond(&instance1);
 unref_instance_cond(&vinstance0);
 unref_instance_cond(&vinstance1);
 unref_instance_cond(&tinstance0);
 unref_instance_cond(&tinstance1);

 ast_debug(1, "Setting early bridge SDP of '%s' with that of '%s'\n", ast_channel_name(c0), c1 ? ast_channel_name(c1) : "<unspecified>");

 return 0;
}

ast_rtp_instance_early_bridge_make_compatible()

void ast_rtp_instance_early_bridge_make_compatible	(	struct ast_channel *	c_dst,
		struct ast_channel *	c_src
	)

Make two channels compatible for early bridging.

Parameters

c_dst	Destination channel to copy to
c_src	Source channel to copy from

Since

1.8

Definition at line 2251 of file rtp_engine.c.

References ao2_cleanup, ast_channel_lock_both, ast_channel_name(), ast_channel_tech(), ast_channel_unlock, ast_debug, ast_format_cap_alloc, AST_FORMAT_CAP_FLAG_DEFAULT, ast_format_cap_iscompatible(), ast_log, ast_rtp_codecs_payloads_xover(), AST_RTP_GLUE_RESULT_FORBID, AST_RTP_GLUE_RESULT_REMOTE, ast_rtp_instance_get_glue(), ast_rtp_instance::codecs, done, ast_rtp_glue::get_codec, ast_rtp_glue::get_rtp_info, ast_rtp_glue::get_vrtp_info, LOG_WARNING, NULL, type, unref_instance_cond(), and ast_rtp_glue::update_peer.

Referenced by dial_exec_full(), and do_forward().

{
 struct ast_rtp_instance *instance_dst = NULL, *instance_src = NULL,
 *vinstance_dst = NULL, *vinstance_src = NULL,
 *tinstance_dst = NULL, *tinstance_src = NULL;
 struct ast_rtp_glue *glue_dst, *glue_src;
 enum ast_rtp_glue_result audio_glue_dst_res = AST_RTP_GLUE_RESULT_FORBID, video_glue_dst_res = AST_RTP_GLUE_RESULT_FORBID;
 enum ast_rtp_glue_result audio_glue_src_res = AST_RTP_GLUE_RESULT_FORBID, video_glue_src_res = AST_RTP_GLUE_RESULT_FORBID;
 struct ast_format_cap *cap_dst = ast_format_cap_alloc(AST_FORMAT_CAP_FLAG_DEFAULT);
 struct ast_format_cap *cap_src = ast_format_cap_alloc(AST_FORMAT_CAP_FLAG_DEFAULT);

 /* Lock both channels so we can look for the glue that binds them together */
 ast_channel_lock_both(c_dst, c_src);

 if (!cap_src || !cap_dst) {
 goto done;
 }

 /* Grab glue that binds each channel to something using the RTP engine */
 if (!(glue_dst = ast_rtp_instance_get_glue(ast_channel_tech(c_dst)->type)) || !(glue_src = ast_rtp_instance_get_glue(ast_channel_tech(c_src)->type))) {
 ast_debug(1, "Can't find native functions for channel '%s'\n", glue_dst ? ast_channel_name(c_src) : ast_channel_name(c_dst));
 goto done;
 }

 audio_glue_dst_res = glue_dst->get_rtp_info(c_dst, &instance_dst);
 video_glue_dst_res = glue_dst->get_vrtp_info ? glue_dst->get_vrtp_info(c_dst, &vinstance_dst) : AST_RTP_GLUE_RESULT_FORBID;

 audio_glue_src_res = glue_src->get_rtp_info(c_src, &instance_src);
 video_glue_src_res = glue_src->get_vrtp_info ? glue_src->get_vrtp_info(c_src, &vinstance_src) : AST_RTP_GLUE_RESULT_FORBID;

 /* If we are carrying video, and both sides are not going to remotely bridge... fail the native bridge */
 if (video_glue_dst_res != AST_RTP_GLUE_RESULT_FORBID && (audio_glue_dst_res != AST_RTP_GLUE_RESULT_REMOTE || video_glue_dst_res != AST_RTP_GLUE_RESULT_REMOTE)) {
 audio_glue_dst_res = AST_RTP_GLUE_RESULT_FORBID;
 }
 if (video_glue_src_res != AST_RTP_GLUE_RESULT_FORBID && (audio_glue_src_res != AST_RTP_GLUE_RESULT_REMOTE || video_glue_src_res != AST_RTP_GLUE_RESULT_REMOTE)) {
 audio_glue_src_res = AST_RTP_GLUE_RESULT_FORBID;
 }
 if (audio_glue_dst_res == AST_RTP_GLUE_RESULT_REMOTE && (video_glue_dst_res == AST_RTP_GLUE_RESULT_FORBID || video_glue_dst_res == AST_RTP_GLUE_RESULT_REMOTE) && glue_dst->get_codec) {
  glue_dst->get_codec(c_dst, cap_dst);
 }
 if (audio_glue_src_res == AST_RTP_GLUE_RESULT_REMOTE && (video_glue_src_res == AST_RTP_GLUE_RESULT_FORBID || video_glue_src_res == AST_RTP_GLUE_RESULT_REMOTE) && glue_src->get_codec) {
 glue_src->get_codec(c_src, cap_src);
 }

 /* If any sort of bridge is forbidden just completely bail out and go back to generic bridging */
 if (audio_glue_dst_res != AST_RTP_GLUE_RESULT_REMOTE || audio_glue_src_res != AST_RTP_GLUE_RESULT_REMOTE) {
 goto done;
 }

 /* Make sure we have matching codecs */
 if (!ast_format_cap_iscompatible(cap_dst, cap_src)) {
 goto done;
 }

 ast_rtp_codecs_payloads_xover(&instance_src->codecs, &instance_dst->codecs, instance_dst);

 if (vinstance_dst && vinstance_src) {
 ast_rtp_codecs_payloads_xover(&vinstance_src->codecs, &vinstance_dst->codecs, vinstance_dst);
 }
 if (tinstance_dst && tinstance_src) {
 ast_rtp_codecs_payloads_xover(&tinstance_src->codecs, &tinstance_dst->codecs, tinstance_dst);
 }

 if (glue_dst->update_peer(c_dst, instance_src, vinstance_src, tinstance_src, cap_src, 0)) {
 ast_log(LOG_WARNING, "Channel '%s' failed to setup early bridge to '%s'\n",
 ast_channel_name(c_dst), ast_channel_name(c_src));
 } else {
 ast_debug(1, "Seeded SDP of '%s' with that of '%s'\n",
 ast_channel_name(c_dst), ast_channel_name(c_src));
 }

done:
 ast_channel_unlock(c_dst);
 ast_channel_unlock(c_src);

 ao2_cleanup(cap_dst);
 ao2_cleanup(cap_src);

 unref_instance_cond(&instance_dst);
 unref_instance_cond(&instance_src);
 unref_instance_cond(&vinstance_dst);
 unref_instance_cond(&vinstance_src);
 unref_instance_cond(&tinstance_dst);
 unref_instance_cond(&tinstance_src);
}

ast_rtp_instance_extmap_clear()

void ast_rtp_instance_extmap_clear

(

struct ast_rtp_instance *

instance

)

Clear negotiated RTP extension information.

Parameters

instance

The RTP instance to clear negotiated extension information on

Definition at line 862 of file rtp_engine.c.

References ao2_lock, ao2_unlock, AST_RTP_EXTENSION_DIRECTION_NONE, AST_RTP_EXTENSION_UNSUPPORTED, AST_VECTOR_REPLACE, AST_VECTOR_SIZE, and rtp_extmap::extension.

Referenced by process_extmap_attributes().

{
 static const struct rtp_extmap extmap_none = {
 .extension = AST_RTP_EXTENSION_UNSUPPORTED,
 .direction = AST_RTP_EXTENSION_DIRECTION_NONE,
 };
 int idx;

 ao2_lock(instance);

 /* Clear both the known unique ids and the negotiated extensions as we are about to have
 * new results set on us.
 */
 for (idx = 0; idx < AST_VECTOR_SIZE(&instance->extmap_unique_ids); ++idx) {
 AST_VECTOR_REPLACE(&instance->extmap_unique_ids, idx, extmap_none);
 }

 for (idx = 0; idx < AST_VECTOR_SIZE(&instance->extmap_negotiated); ++idx) {
 AST_VECTOR_REPLACE(&instance->extmap_negotiated, idx, -1);
 }

 ao2_unlock(instance);
}

ast_rtp_instance_extmap_count()

size_t ast_rtp_instance_extmap_count

(

struct ast_rtp_instance *

instance

)

Get the number of known unique identifiers.

Parameters

instance

The RTP instance to retrieve the count from

Returns

the number of known unique identifiers

Since

15.5.0

Definition at line 899 of file rtp_engine.c.

References ao2_lock, ao2_unlock, and AST_VECTOR_SIZE.

Referenced by add_extmap_to_stream(), and enable_rtp_extension().

{
 size_t count;

 ao2_lock(instance);
 count = AST_VECTOR_SIZE(&instance->extmap_unique_ids);
 ao2_unlock(instance);

 return count;
}

ast_rtp_instance_extmap_enable()

int ast_rtp_instance_extmap_enable	(	struct ast_rtp_instance *	instance,
		int	id,
		enum ast_rtp_extension	extension,
		enum ast_rtp_extension_direction	direction
	)

Enable support for an RTP extension on an instance.

Parameters

instance	The RTP instance to enable the extension on
id	The unique local identifier to use for this extension (-1 to have one auto selected)
extension	The RTP extension
direction	The initial direction that the RTP extension should be used in

Return values

0	success
-1	failure

Since

15.5.0

Definition at line 732 of file rtp_engine.c.

References ao2_lock, ao2_unlock, AST_RTP_EXTENSION_DIRECTION_NONE, AST_RTP_EXTENSION_UNSUPPORTED, AST_VECTOR_APPEND, AST_VECTOR_REPLACE, AST_VECTOR_SIZE, rtp_extmap::direction, ast_rtp_instance::engine, rtp_extmap::extension, and ast_rtp_engine::extension_enable.

Referenced by enable_rtp_extension().

{
 struct rtp_extmap extmap = {
 .extension = extension,
 .direction = direction,
 };

 ao2_lock(instance);

 if (!instance->engine->extension_enable || !instance->engine->extension_enable(instance, extension)) {
 ao2_unlock(instance);
 return 0;
 }

 /* We store enabled extensions separately so we can easily do negotiation */
 if (AST_VECTOR_REPLACE(&instance->extmap_enabled, extension, direction)) {
 ao2_unlock(instance);
 return -1;
 }

 if (id <= 0) {
 /* We find a free unique identifier for this extension by just appending it to the
 * vector of unique ids. The size of the vector will become its unique identifier.
 * As well when we are asking for information on the extensions it will be returned,
 * allowing it to be added to the SDP offer.
 */
 if (AST_VECTOR_APPEND(&instance->extmap_unique_ids, extmap)) {
 AST_VECTOR_REPLACE(&instance->extmap_enabled, extension, AST_RTP_EXTENSION_DIRECTION_NONE);
 ao2_unlock(instance);
 return -1;
 }
 id = AST_VECTOR_SIZE(&instance->extmap_unique_ids);
 } else {
 /* Otherwise we put it precisely where they want it */
 if (AST_VECTOR_REPLACE(&instance->extmap_unique_ids, id - 1, extmap)) {
 AST_VECTOR_REPLACE(&instance->extmap_enabled, extension, AST_RTP_EXTENSION_DIRECTION_NONE);
 ao2_unlock(instance);
 return -1;
 }
 }

 /* Now that we have an id add the extension to here */
 if (AST_VECTOR_REPLACE(&instance->extmap_negotiated, extension, id)) {
 extmap.extension = AST_RTP_EXTENSION_UNSUPPORTED;
 extmap.direction = AST_RTP_EXTENSION_DIRECTION_NONE;
 AST_VECTOR_REPLACE(&instance->extmap_enabled, extension, AST_RTP_EXTENSION_DIRECTION_NONE);
 AST_VECTOR_REPLACE(&instance->extmap_unique_ids, id - 1, extmap);
 ao2_unlock(instance);
 return -1;
 }

 ao2_unlock(instance);

 return 0;
}

ast_rtp_instance_extmap_get_direction()

enum ast_rtp_extension_direction ast_rtp_instance_extmap_get_direction	(	struct ast_rtp_instance *	instance,
		int	id
	)

Retrieve the negotiated direction for an RTP extension id.

Parameters

instance	The RTP instance to retrieve the direction from
id	The negotiated RTP extension id

Return values

direction

the direction that has been negotiated

Since

15.5.0

Definition at line 930 of file rtp_engine.c.

References ao2_lock, ao2_unlock, AST_RTP_EXTENSION_DIRECTION_NONE, AST_VECTOR_GET_ADDR, AST_VECTOR_SIZE, and rtp_extmap::direction.

Referenced by add_extmap_to_stream().

{
 enum ast_rtp_extension_direction direction = AST_RTP_EXTENSION_DIRECTION_NONE;

 ao2_lock(instance);

 if (0 < id && id <= AST_VECTOR_SIZE(&instance->extmap_unique_ids)) {
 struct rtp_extmap *extmap = AST_VECTOR_GET_ADDR(&instance->extmap_unique_ids, id - 1);

 direction = extmap->direction;
 }
 ao2_unlock(instance);

 return direction;
}

ast_rtp_instance_extmap_get_extension()

enum ast_rtp_extension ast_rtp_instance_extmap_get_extension	(	struct ast_rtp_instance *	instance,
		int	id
	)

Retrieve the extension for an RTP extension id.

Parameters

instance	The RTP instance to retrieve the extension from
id	The negotiated RTP extension id

Return values

extension

the extension that maps to the id

Since

15.5.0

Note

This will return AST_RTP_EXTENSION_UNSUPPORTED if an extension was proposed for this unique identifier but it is not supported or if the unique identifier is unused.

Definition at line 910 of file rtp_engine.c.

References ao2_lock, ao2_unlock, AST_RTP_EXTENSION_UNSUPPORTED, AST_VECTOR_GET_ADDR, AST_VECTOR_SIZE, and rtp_extmap::extension.

Referenced by add_extmap_to_stream(), and ast_rtp_instance_extmap_get_uri().

{
 enum ast_rtp_extension extension = AST_RTP_EXTENSION_UNSUPPORTED;

 ao2_lock(instance);

 /* The local unique identifier starts at '1' so the highest unique identifier
 * can be the actual size of the vector. We compensate (as it is 0 index based)
 * by dropping it down to 1 to get the correct information.
 */
 if (0 < id && id <= AST_VECTOR_SIZE(&instance->extmap_unique_ids)) {
 struct rtp_extmap *extmap = AST_VECTOR_GET_ADDR(&instance->extmap_unique_ids, id - 1);

 extension = extmap->extension;
 }
 ao2_unlock(instance);

 return extension;
}

ast_rtp_instance_extmap_get_id()

int ast_rtp_instance_extmap_get_id	(	struct ast_rtp_instance *	instance,
		enum ast_rtp_extension	extension
	)

Retrieve the id for an RTP extension.

Parameters

instance	The RTP instance to retrieve the id from
extension	The RTP extension

Return values

-1	not negotiated
id	if negotiated

Since

15.5.0

Definition at line 886 of file rtp_engine.c.

References ao2_lock, ao2_unlock, AST_VECTOR_GET, AST_VECTOR_SIZE, and id.

Referenced by ast_rtp_rtcp_handle_nack(), enable_rtp_extension(), rtp_instance_parse_extmap_extensions(), and rtp_raw_write().

{
 int id = -1;

 ao2_lock(instance);
 if (extension < AST_VECTOR_SIZE(&instance->extmap_negotiated)) {
 id = AST_VECTOR_GET(&instance->extmap_negotiated, extension);
 }
 ao2_unlock(instance);

 return id;
}

ast_rtp_instance_extmap_get_uri()

const char* ast_rtp_instance_extmap_get_uri	(	struct ast_rtp_instance *	instance,
		int	id
	)

Retrieve the URI for an RTP extension id.

Parameters

instance	The RTP instance to retrieve the direction from
id	The negotiated RTP extension id

Return values

uri	The URI for the RTP extension

Since

15.5.0

Definition at line 946 of file rtp_engine.c.

References ARRAY_LEN, AST_RTP_EXTENSION_UNSUPPORTED, ast_rtp_instance_extmap_get_extension(), rtp_extmap::extension, NULL, and rtp_extension_uris.

Referenced by add_extmap_to_stream().

{
 enum ast_rtp_extension extension = ast_rtp_instance_extmap_get_extension(instance, id);

 if (extension == AST_RTP_EXTENSION_UNSUPPORTED ||
 (unsigned int)extension >= ARRAY_LEN(rtp_extension_uris)) {
 return NULL;
 }

 return rtp_extension_uris[extension];
}

ast_rtp_instance_extmap_negotiate()

int ast_rtp_instance_extmap_negotiate	(	struct ast_rtp_instance *	instance,
		int	id,
		enum ast_rtp_extension_direction	direction,
		const char *	uri,
		const char *	attributes
	)

Negotiate received RTP extension information.

Parameters

instance	The RTP instance to set the extension on
id	The local identifier for the extension
direction	The direction that the extension should be used in
uri	The unique URI for the extension
attributes	Attributes specific to this extension (if NULL or empty then no attributes)

Return values

0	success
-1	failure

Since

15.5.0

Definition at line 818 of file rtp_engine.c.

References ao2_lock, ao2_unlock, ARRAY_LEN, AST_RTP_EXTENSION_DIRECTION_NONE, AST_RTP_EXTENSION_UNSUPPORTED, AST_VECTOR_GET, AST_VECTOR_REPLACE, AST_VECTOR_SIZE, rtp_extmap::direction, rtp_extmap::extension, rtp_extension_uris, and rtp_extmap_negotiate_direction().

Referenced by process_extmap_attributes().

{
 /* 'attributes' is currently unused but exists in the API to ensure it does not need to be altered
 * in the future in case we need to use it.
 */
 int idx;
 enum ast_rtp_extension extension = AST_RTP_EXTENSION_UNSUPPORTED;

 /* Per the RFC the identifier has to be 1 or above */
 if (id < 1) {
 return -1;
 }

 /* Convert the provided URI to the internal representation */
 for (idx = 0; idx < ARRAY_LEN(rtp_extension_uris); ++idx) {
 if (!strcasecmp(rtp_extension_uris[idx], uri)) {
 extension = idx;
 break;
 }
 }

 ao2_lock(instance);
 /* We only accept the extension if it is enabled */
 if (extension < AST_VECTOR_SIZE(&instance->extmap_enabled) &&
 AST_VECTOR_GET(&instance->extmap_enabled, extension) != AST_RTP_EXTENSION_DIRECTION_NONE) {
 struct rtp_extmap extmap = {
 .extension = extension,
 .direction = rtp_extmap_negotiate_direction(AST_VECTOR_GET(&instance->extmap_enabled, extension), direction),
 };

 /* If the direction negotiation failed then don't accept or use this extension */
 if (extmap.direction != AST_RTP_EXTENSION_DIRECTION_NONE) {
 if (extension != AST_RTP_EXTENSION_UNSUPPORTED) {
 AST_VECTOR_REPLACE(&instance->extmap_negotiated, extension, id);
 }
 AST_VECTOR_REPLACE(&instance->extmap_unique_ids, id - 1, extmap);
 }
 }
 ao2_unlock(instance);

 return 0;
}

ast_rtp_instance_fd()

int ast_rtp_instance_fd	(	struct ast_rtp_instance *	instance,
		int	rtcp
	)

Get the file descriptor for an RTP session (or RTCP)

Parameters

instance	Instance to get the file descriptor for
rtcp	Whether to retrieve the file descriptor for RTCP or not

Return values

fd	success
-1	failure

Example usage:

int rtp_fd = ast_rtp_instance_fd(instance, 0);

This retrieves the file descriptor for the socket carrying media on the instance pointed to by instance.

Since

1.8

Definition at line 2192 of file rtp_engine.c.

References ao2_lock, ao2_unlock, ast_rtp_instance::engine, and ast_rtp_engine::fd.

Referenced by apply_negotiated_sdp_stream(), check_for_rtp_changes(), configure_local_rtp(), configure_rtcp(), jingle_enable_video(), jingle_new(), mgcp_new(), rtp_find_rtcp_fd_position(), sip_new(), sip_set_rtp_peer(), skinny_new(), start_rtp(), transmit_reinvite_with_sdp(), unicast_rtp_request(), and unistim_new().

{
 int res;

 if (instance->engine->fd) {
 ao2_lock(instance);
 res = instance->engine->fd(instance, rtcp);
 ao2_unlock(instance);
 } else {
 res = -1;
 }
 return res;
}

ast_rtp_instance_get_active_glue()

struct ast_rtp_glue* ast_rtp_instance_get_active_glue

(

struct ast_rtp_instance *

instance

)

Get the RTP glue in use on an RTP instance.

Parameters

instance

The RTP instance

Return values

pointer

to the glue

Example:

struct ast_rtp_glue *glue = ast_rtp_instance_get_active_glue(instance);

This gets the RTP glue currently in use on the RTP instance pointed to by 'instance'.

Since

1.8

Definition at line 2705 of file rtp_engine.c.

References ast_rtp_instance::glue.

{
 return instance->glue;
}

ast_rtp_instance_get_and_cmp_local_address()

int ast_rtp_instance_get_and_cmp_local_address	(	struct ast_rtp_instance *	instance,
		struct ast_sockaddr *	address
	)

Get the address of the local endpoint that we are sending RTP to, comparing its address to another.

Parameters

instance	The instance that we want to get the local address for
address	An initialized address that may be overwritten if the local address is different

Return values

0	address was not changed
1	address was changed Example usage:

struct ast_sockaddr address;
int ret;
ret = ast_rtp_instance_get_and_cmp_local_address(instance, &address);

This retrieves the current local address set on the instance pointed to by instance and puts the value into the address structure.

Since

1.8

Definition at line 629 of file rtp_engine.c.

References ao2_lock, ao2_unlock, ast_sockaddr_cmp(), ast_sockaddr_copy(), and ast_rtp_instance::local_address.

{
 ao2_lock(instance);
 if (ast_sockaddr_cmp(address, &instance->local_address) != 0) {
 ast_sockaddr_copy(address, &instance->local_address);
 ao2_unlock(instance);
 return 1;
 }
 ao2_unlock(instance);

 return 0;
}

ast_rtp_instance_get_and_cmp_requested_target_address()

int ast_rtp_instance_get_and_cmp_requested_target_address	(	struct ast_rtp_instance *	instance,
		struct ast_sockaddr *	address
	)

Get the requested target address of the remote endpoint and compare it to the given address.

Parameters

instance	The instance that we want to get the remote address for
address	An initialized address that may be overwritten addresses differ

Return values

0	address was not changed
1	address was changed

Definition at line 651 of file rtp_engine.c.

References ao2_lock, ao2_unlock, ast_sockaddr_cmp(), ast_sockaddr_copy(), and ast_rtp_instance::requested_target_address.

{
 ao2_lock(instance);
 if (ast_sockaddr_cmp(address, &instance->requested_target_address) != 0) {
 ast_sockaddr_copy(address, &instance->requested_target_address);
 ao2_unlock(instance);
 return 1;
 }
 ao2_unlock(instance);

 return 0;
}

ast_rtp_instance_get_bridged()

struct ast_rtp_instance* ast_rtp_instance_get_bridged

(

struct ast_rtp_instance *

instance

)

Get the other RTP instance that an instance is bridged to.

Parameters

instance

The RTP instance that we want

Return values

non-NULL	success
NULL	failure

Example usage:

struct ast_rtp_instance *bridged = ast_rtp_instance_get_bridged(instance0);

This gets the RTP instance that instance0 is bridged to.

Since

1.8

Definition at line 2234 of file rtp_engine.c.

References ao2_lock, ao2_unlock, and ast_rtp_instance::bridged.

Referenced by ast_rtp_interpret(), and dialog_needdestroy().

{
 struct ast_rtp_instance *bridged;

 ao2_lock(instance);
 bridged = instance->bridged;
 ao2_unlock(instance);
 return bridged;
}

ast_rtp_instance_get_channel_id()

const char* ast_rtp_instance_get_channel_id

(

struct ast_rtp_instance *

instance

)

Get the unique ID of the channel that owns this RTP instance.

Note that this should remain valid for the lifetime of the RTP instance.

Parameters

instance

The RTP instance

Return values

The	unique ID of the channel
Empty	string if no channel owns this RTP instance

Since

12

Definition at line 548 of file rtp_engine.c.

References ast_rtp_instance::channel_uniqueid.

Referenced by ast_rtp_get_stat(), rtp_check_timeout(), and rtp_transport_wide_cc_feedback_produce().

{
 return instance->channel_uniqueid;
}

ast_rtp_instance_get_cname()

const char* ast_rtp_instance_get_cname

(

struct ast_rtp_instance *

rtp

)

Retrieve the CNAME used in RTCP SDES items.

This is a pointer directly into the RTP struct, not a copy.

Parameters

rtp	The RTP instance

Returns

the CNAME

Definition at line 3791 of file rtp_engine.c.

References ao2_lock, ao2_unlock, ast_rtp_engine::cname_get, and ast_rtp_instance::engine.

Referenced by add_ssrc_to_stream().

{
 const char *cname = "";

 ao2_lock(rtp);
 if (rtp->engine->cname_get) {
 cname = rtp->engine->cname_get(rtp);
 }
 ao2_unlock(rtp);

 return cname;
}

ast_rtp_instance_get_codecs()

struct ast_rtp_codecs* ast_rtp_instance_get_codecs

(

struct ast_rtp_instance *

instance

)

Get the codecs structure of an RTP instance.

Parameters

instance

The RTP instance to get the codecs structure from

Example usage:

struct ast_rtp_codecs *codecs = ast_rtp_instance_get_codecs(instance);

This gets the codecs structure on the RTP instance pointed to by 'instance'.

Since

1.8

Definition at line 727 of file rtp_engine.c.

References ast_rtp_instance::codecs.

Referenced by add_codec_to_sdp(), add_noncodec_to_sdp(), add_sdp(), add_tcodec_to_sdp(), add_vcodec_to_sdp(), apply_cap_to_bundled(), ast_rtp_dtmf_begin(), ast_rtp_interpret(), ast_rtp_read(), ast_rtp_sendcng(), ast_rtp_write(), bridge_p2p_rtp_write(), check_peer_ok(), configure_local_rtp(), create_addr_from_peer(), create_outgoing_sdp_stream(), jingle_add_payloads_to_description(), jingle_enable_video(), jingle_interpret_description(), jingle_new(), multicast_rtp_write(), native_rtp_bridge_compatible_check(), ooh323_set_write_format(), process_sdp(), send_start_rtp(), set_caps(), set_incoming_call_offer_cap(), setup_rtp_connection(), and start_rtp().

{
 return &instance->codecs;
}

ast_rtp_instance_get_data()

void* ast_rtp_instance_get_data

(

struct ast_rtp_instance *

instance

)

Get the data portion of an RTP instance.

Parameters

instance

The RTP instance we want the data portion from

Example usage:

 struct *blob = ast_rtp_instance_get_data(instance);
( 

This gets the data pointer on the RTP instance pointed to by 'instance'.

Since

1.8

Definition at line 563 of file rtp_engine.c.

References ast_rtp_instance::data.

Referenced by __rtp_recvfrom(), __rtp_sendto(), ast_rtcp_calculate_sr_rr_statistics(), ast_rtcp_generate_nack(), ast_rtcp_generate_report(), ast_rtcp_generate_sdes(), ast_rtcp_interpret(), ast_rtcp_read(), ast_rtcp_write(), ast_rtp_bundle(), ast_rtp_change_source(), ast_rtp_destroy(), ast_rtp_dtmf_begin(), ast_rtp_dtmf_continuation(), ast_rtp_dtmf_end_with_duration(), ast_rtp_dtmf_mode_get(), ast_rtp_dtmf_mode_set(), ast_rtp_fd(), ast_rtp_get_cname(), ast_rtp_get_ssrc(), ast_rtp_get_stat(), ast_rtp_ice_add_remote_candidate(), ast_rtp_ice_change_components(), ast_rtp_ice_get_local_candidates(), ast_rtp_ice_get_password(), ast_rtp_ice_get_ufrag(), ast_rtp_ice_lite(), ast_rtp_ice_set_authentication(), ast_rtp_ice_set_role(), ast_rtp_ice_start(), ast_rtp_ice_start_media(), ast_rtp_ice_stop(), ast_rtp_ice_turn_request(), ast_rtp_interpret(), ast_rtp_local_bridge(), ast_rtp_on_ice_rx_data(), ast_rtp_on_ice_tx_pkt(), ast_rtp_on_turn_rtcp_state(), ast_rtp_on_turn_rtp_state(), ast_rtp_on_turn_rx_rtcp_data(), ast_rtp_on_turn_rx_rtp_data(), ast_rtp_prop_set(), ast_rtp_qos_set(), ast_rtp_read(), ast_rtp_remote_address_set(), ast_rtp_rtcp_handle_nack(), ast_rtp_sendcng(), ast_rtp_set_remote_ssrc(), ast_rtp_set_stream_num(), ast_rtp_stop(), ast_rtp_stun_request(), ast_rtp_update_source(), ast_rtp_write(), bridge_p2p_rtp_write(), create_dtmf_frame(), get_recv_buffer_count(), get_recv_buffer_max(), get_send_buffer_count(), ice_create(), ice_reset_session(), multicast_rtp_activate(), multicast_rtp_destroy(), multicast_rtp_write(), process_cn_rfc3389(), process_dtmf_cisco(), process_dtmf_rfc2833(), red_write(), rtcp_debug_test_addr(), rtp_instance_parse_transport_wide_cc(), rtp_raw_write(), rtp_red_buffer(), rtp_red_init(), rtp_sendto(), rtp_transport_wide_cc_feedback_produce(), set_rtp_rtcp_schedid(), and test_sip_rtpqos_1_get_stat().

{
 return instance->data;
}

ast_rtp_instance_get_dtls()

struct ast_rtp_engine_dtls* ast_rtp_instance_get_dtls

(

struct ast_rtp_instance *

instance

)

Obtain a pointer to the DTLS support present on an RTP instance.

Parameters

instance

the RTP instance

Return values

DTLS	support if present
NULL	if no DTLS support available

Definition at line 3011 of file rtp_engine.c.

References ast_rtp_engine::dtls, ast_rtp_instance::engine, NULL, and rtp_dtls_wrappers.

Referenced by add_crypto_to_stream(), add_dtls_to_sdp(), apply_dtls_attrib(), ast_sdp_get_rtp_profile(), dialog_initialize_dtls_srtp(), process_crypto(), process_sdp(), process_sdp_a_dtls(), and setup_dtls_srtp().

{
 if (instance->engine->dtls) {
 return &rtp_dtls_wrappers;
 }
 /* DTLS not available */
 return NULL;
}

ast_rtp_instance_get_engine()

struct ast_rtp_engine* ast_rtp_instance_get_engine

(

struct ast_rtp_instance *

instance

)

Get the RTP engine in use on an RTP instance.

Parameters

instance

The RTP instance

Return values

pointer

to the engine

Example usage:

struct ast_rtp_engine *engine = ast_rtp_instance_get_engine(instance);

This gets the RTP engine currently in use on the RTP instance pointed to by 'instance'.

Since

1.8

Definition at line 2700 of file rtp_engine.c.

References ast_rtp_instance::engine.

Referenced by native_rtp_bridge_compatible_check(), native_rtp_bridge_start(), and native_rtp_bridge_stop().

{
 return instance->engine;
}

ast_rtp_instance_get_extended_prop()

void* ast_rtp_instance_get_extended_prop	(	struct ast_rtp_instance *	instance,
		int	property
	)

Get the value of an RTP instance extended property.

Parameters

instance	The RTP instance to get the extended property on
property	The extended property to get

Since

1.8

Definition at line 690 of file rtp_engine.c.

References ao2_lock, ao2_unlock, ast_rtp_instance::engine, ast_rtp_engine::extended_prop_get, and NULL.

{
 void *prop;

 if (instance->engine->extended_prop_get) {
 ao2_lock(instance);
 prop = instance->engine->extended_prop_get(instance, property);
 ao2_unlock(instance);
 } else {
 prop = NULL;
 }

 return prop;
}

ast_rtp_instance_get_glue()

struct ast_rtp_glue* ast_rtp_instance_get_glue

(

const char *

type

)

Get the RTP glue that binds a channel to the RTP engine.

Parameters

type	Name of the glue we want

Return values

non-NULL	success
NULL	failure

Example usage:

struct ast_rtp_glue *glue = ast_rtp_instance_get_glue("Example");

This retrieves the RTP glue that has the name 'Example'.

Since

1.8

Definition at line 2206 of file rtp_engine.c.

References AST_RWLIST_RDLOCK, AST_RWLIST_TRAVERSE, AST_RWLIST_UNLOCK, NULL, and ast_rtp_glue::type.

Referenced by ast_ari_channels_rtpstatistics(), ast_rtp_instance_early_bridge(), ast_rtp_instance_early_bridge_make_compatible(), ast_rtp_instance_make_compatible(), and rtp_glue_data_get().

{
 struct ast_rtp_glue *glue = NULL;

 AST_RWLIST_RDLOCK(&glues);

 AST_RWLIST_TRAVERSE(&glues, glue, entry) {
 if (!strcasecmp(glue->type, type)) {
 break;
 }
 }

 AST_RWLIST_UNLOCK(&glues);

 return glue;
}

ast_rtp_instance_get_hold_timeout()

int ast_rtp_instance_get_hold_timeout

(

struct ast_rtp_instance *

instance

)

Get the RTP timeout value for when an RTP instance is on hold.

Parameters

instance

The RTP instance

Return values

timeout

value

Example usage:

int timeout = ast_rtp_instance_get_hold_timeout(instance);

This gets the RTP hold timeout value for the RTP instance pointed to by 'instance'.

Since

1.8

Definition at line 2690 of file rtp_engine.c.

References ast_rtp_instance::holdtimeout.

Referenced by check_rtp_timeout().

{
 return instance->holdtimeout;
}

ast_rtp_instance_get_ice()

struct ast_rtp_engine_ice* ast_rtp_instance_get_ice

(

struct ast_rtp_instance *

instance

)

Obtain a pointer to the ICE support present on an RTP instance.

Parameters

instance

the RTP instance

Return values

ICE	support if present
NULL	if no ICE support available

Definition at line 2891 of file rtp_engine.c.

References ast_rtp_instance::engine, ast_rtp_engine::ice, NULL, and rtp_ice_wrappers.

Referenced by add_ice_to_sdp(), add_ice_to_stream(), check_ice_support(), create_rtp(), dialog_initialize_rtp(), jingle_add_google_candidates_to_transport(), jingle_add_ice_udp_candidates_to_transport(), jingle_enable_video(), jingle_interpret_google_transport(), jingle_interpret_ice_udp_transport(), jingle_new(), jingle_outgoing_hook(), jingle_request(), process_ice_attributes(), process_ice_auth_attrb(), process_sdp_a_ice(), set_ice_components(), and start_ice().

{
 if (instance->engine->ice) {
 return &rtp_ice_wrappers;
 }
 /* ICE not available */
 return NULL;
}

ast_rtp_instance_get_incoming_source_address()

void ast_rtp_instance_get_incoming_source_address	(	struct ast_rtp_instance *	instance,
		struct ast_sockaddr *	address
	)

Get the incoming source address of the remote endpoint.

This returns the remote address the engine is sending RTP to. Usually this will be the same as the requested target address, however in the case where the engine "learns" the address (for instance, symmetric RTP enabled) this will then contain the learned address.

Parameters

instance	The instance that we want to get the incoming source address for
address	A structure to put the address into

Definition at line 665 of file rtp_engine.c.

References ao2_lock, ao2_unlock, ast_sockaddr_copy(), and ast_rtp_instance::incoming_source_address.

{
 ao2_lock(instance);
 ast_sockaddr_copy(address, &instance->incoming_source_address);
 ao2_unlock(instance);
}

ast_rtp_instance_get_keepalive()

int ast_rtp_instance_get_keepalive

(

struct ast_rtp_instance *

instance

)

Get the RTP keepalive interval.

Parameters

instance

The RTP instance

Return values

period

Keepalive interval value

Example usage:

int interval = ast_rtp_instance_get_keepalive(instance);

This gets the RTP keepalive interval value for the RTP instance pointed to by 'instance'.

Since

1.8

Definition at line 2695 of file rtp_engine.c.

References ast_rtp_instance::keepalive.

Referenced by check_rtp_timeout(), and send_keepalive().

{
 return instance->keepalive;
}

ast_rtp_instance_get_last_rx()

time_t ast_rtp_instance_get_last_rx

(

const struct ast_rtp_instance *

rtp

)

Definition at line 3768 of file rtp_engine.c.

References ast_rtp_instance::last_rx.

Referenced by rtp_check_timeout().

{
 return rtp->last_rx;
}

ast_rtp_instance_get_last_tx()

time_t ast_rtp_instance_get_last_tx

(

const struct ast_rtp_instance *

rtp

)

Get the last RTP transmission time.

Parameters

rtp	The instance from which to get the last transmission time

Returns

The last RTP transmission time

Definition at line 3758 of file rtp_engine.c.

References ast_rtp_instance::last_tx.

Referenced by send_keepalive().

{
 return rtp->last_tx;
}

ast_rtp_instance_get_local_address()

void ast_rtp_instance_get_local_address	(	struct ast_rtp_instance *	instance,
		struct ast_sockaddr *	address
	)

Get the local address that we are expecting RTP on.

Parameters

instance	The RTP instance to get the address from
address	The variable to store the address in

Example usage:

struct ast_sockaddr address;
ast_rtp_instance_get_local_address(instance, &address);

This gets the local address that we are expecting RTP on and stores it in the 'address' structure.

Since

1.8

Definition at line 643 of file rtp_engine.c.

References ao2_lock, ao2_unlock, ast_sockaddr_copy(), and ast_rtp_instance::local_address.

Referenced by add_sdp(), ast_rtp_ice_turn_request(), ast_rtp_prop_set(), ast_rtp_remote_address_set(), channel_read_rtp(), configure_local_rtp(), create_outgoing_sdp_stream(), get_our_media_address(), handle_open_receive_channel_ack_message(), multicast_send_control_packet(), send_start_rtp(), sip_acf_channel_read(), sip_allow_anyrtp_remote(), skinny_set_rtp_peer(), test_init_rtp_instances(), unicast_rtp_request(), and unistim_set_rtp_peer().

{
 ao2_lock(instance);
 ast_sockaddr_copy(address, &instance->local_address);
 ao2_unlock(instance);
}

ast_rtp_instance_get_prop()

int ast_rtp_instance_get_prop	(	struct ast_rtp_instance *	instance,
		enum ast_rtp_property	property
	)

Get the value of an RTP instance property.

Parameters

instance	The RTP instance to get the property from
property	The property to get

Return values

Current

value of the property

Example usage:

ast_rtp_instance_get_prop(instance, AST_RTP_PROPERTY_NAT);

This returns the current value of the NAT property on the instance pointed to by instance.

Since

1.8

Definition at line 716 of file rtp_engine.c.

References ao2_lock, ao2_unlock, and ast_rtp_instance::properties.

Referenced by ast_rtcp_interpret(), ast_rtp_dtmf_compatible(), ast_rtp_read(), bridge_p2p_rtp_write(), process_dtmf_cisco(), process_dtmf_rfc2833(), rtp_raw_write(), and rtp_write_rtcp_psfb().

{
 int prop;

 ao2_lock(instance);
 prop = instance->properties[property];
 ao2_unlock(instance);

 return prop;
}

ast_rtp_instance_get_quality()

char* ast_rtp_instance_get_quality	(	struct ast_rtp_instance *	instance,
		enum ast_rtp_instance_stat_field	field,
		char *	buf,
		size_t	size
	)

Retrieve quality statistics about an RTP instance.

Parameters

instance	Instance to get statistics on
field	What quality statistic to retrieve
buf	What buffer to put the result into
size	Size of the above buffer

Return values

non-NULL	success
NULL	failure

Example usage:

char quality[AST_MAX_USER_FIELD];
ast_rtp_instance_get_quality(instance, AST_RTP_INSTANCE_STAT_FIELD_QUALITY, &buf, sizeof(buf));

This retrieves general quality statistics and places a text representation into the buf pointed to by buf.

Since

1.8

Definition at line 2460 of file rtp_engine.c.

References ast_rtp_instance_get_stats(), AST_RTP_INSTANCE_STAT_ALL, AST_RTP_INSTANCE_STAT_COMBINED_JITTER, AST_RTP_INSTANCE_STAT_COMBINED_LOSS, AST_RTP_INSTANCE_STAT_COMBINED_RTT, AST_RTP_INSTANCE_STAT_FIELD_QUALITY, AST_RTP_INSTANCE_STAT_FIELD_QUALITY_JITTER, AST_RTP_INSTANCE_STAT_FIELD_QUALITY_LOSS, AST_RTP_INSTANCE_STAT_FIELD_QUALITY_RTT, buf, ast_rtp_instance_stats::local_maxjitter, ast_rtp_instance_stats::local_maxrxploss, ast_rtp_instance_stats::local_minjitter, ast_rtp_instance_stats::local_minrxploss, ast_rtp_instance_stats::local_normdevjitter, ast_rtp_instance_stats::local_normdevrxploss, ast_rtp_instance_stats::local_ssrc, ast_rtp_instance_stats::local_stdevjitter, ast_rtp_instance_stats::local_stdevrxploss, ast_rtp_instance_stats::maxrtt, ast_rtp_instance_stats::minrtt, ast_rtp_instance_stats::normdevrtt, NULL, ast_rtp_instance_stats::remote_maxjitter, ast_rtp_instance_stats::remote_maxrxploss, ast_rtp_instance_stats::remote_minjitter, ast_rtp_instance_stats::remote_minrxploss, ast_rtp_instance_stats::remote_normdevjitter, ast_rtp_instance_stats::remote_normdevrxploss, ast_rtp_instance_stats::remote_ssrc, ast_rtp_instance_stats::remote_stdevjitter, ast_rtp_instance_stats::remote_stdevrxploss, ast_rtp_instance_stats::rtt, ast_rtp_instance_stats::rxcount, ast_rtp_instance_stats::rxjitter, ast_rtp_instance_stats::rxploss, ast_rtp_instance_stats::stdevrtt, ast_rtp_instance_stats::txcount, ast_rtp_insta