Janus core (headers) More...

#include <inttypes.h>
#include <stdlib.h>
#include <stdint.h>
#include <stdio.h>
#include <string.h>
#include <ctype.h>
#include <unistd.h>
#include <jansson.h>
#include "mutex.h"
#include "ice.h"
#include "refcount.h"
#include "transports/transport.h"
#include "events/eventhandler.h"
#include "loggers/logger.h"
#include "plugins/plugin.h"

Include dependency graph for janus.h:

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Go to the source code of this file.

Data Structures
struct	janus_session
	Janus Core-Client session. More...

struct	janus_request
	Helper to address requests and their sources (e.g., a specific HTTP connection, websocket, RabbitMQ or others) More...

Typedefs
typedef struct janus_request	janus_request
	Helper to address requests and their sources (e.g., a specific HTTP connection, websocket, RabbitMQ or others)

typedef struct janus_session	janus_session
	Janus Core-Client session.

Functions
gchar *	janus_get_server_pem (void)
	Helper method to return the path to the provided server certificate.

gchar *	janus_get_server_key (void)
	Helper method to return the path to the provided server certificate key.

gchar *	janus_get_local_ip (void)
	Helper method to return the local IP address (autodetected by default)

gchar *	janus_get_public_ip (guint index)
	Helper method to return a given public IP address to use in the SDP (if multiple are configured for 1-1 NAT)

guint	janus_get_public_ip_count (void)
	Helper method to return the number of public IP addresses (if configured for 1-1 NAT)

void	janus_add_public_ip (const char *ip)
	Helper method to add an IP address to use in the SDP.

gboolean	janus_has_public_ipv4_ip (void)
	Helper method to check if we have at least one manually passed public IPv4 address (for 1-1 NAT management)

gboolean	janus_has_public_ipv6_ip (void)
	Helper method to check if we have at least one manually passed public IPv6 address (for 1-1 NAT management)

gint	janus_is_stopping (void)
	Helper method to check whether the server is being shut down.

gboolean	janus_is_webrtc_encryption_enabled (void)
	Helper method to check whether WebRTC encryption is (as it should) enabled.

Janus Core-Client session methods
janus_session *	janus_session_create (guint64 session_id)
	Method to create a new Janus Core-Client session.

janus_session *	janus_session_find (guint64 session_id)
	Method to find an existing Janus Core-Client session from its ID.

void	janus_session_notify_event (janus_session session, json_t event)
	Method to add an event to notify to the queue of notifications for this session.

gint	janus_session_destroy (janus_session *session)
	Method to destroy a Janus Core-Client session.

janus_ice_handle *	janus_session_handles_find (janus_session *session, guint64 handle_id)
	Method to find an existing Janus ICE handle from its ID.

void	janus_session_handles_insert (janus_session session, janus_ice_handle handle)
	Method to insert a Janus ICE handle in a session.

gint	janus_session_handles_remove (janus_session session, janus_ice_handle handle)
	Method to remove a Janus ICE handle from a session.

void	janus_session_handles_clear (janus_session *session)
	Method to remove all Janus ICE handles from a session.

json_t *	janus_session_handles_list_json (janus_session *session)
	Method to list the IDs of all Janus ICE handles of a session as JSON.

Janus request processing
Since messages may come from different sources (plain HTTP, WebSockets, RabbitMQ and potentially even more in the future), we have a shared way to process messages: a method to process a request, and helper methods to return a success or an error message.
janus_request *	janus_request_new (janus_transport transport, janus_transport_session instance, void request_id, gboolean admin, json_t message, json_error_t *error)
	Helper to allocate a janus_request instance.

void	janus_request_destroy (janus_request *request)
	Helper to destroy a janus_request instance.

int	janus_process_incoming_request (janus_request *request)
	Helper to process an incoming request, no matter where it comes from.

int	janus_process_incoming_admin_request (janus_request *request)
	Helper to process an incoming admin/monitor request, no matter where it comes from.

int	janus_process_success (janus_request request, json_t payload)
	Method to return a successful Janus response message (JSON) to the browser.

int	janus_process_error (janus_request request, uint64_t session_id, const char transaction, gint error, const char *format,...) G_GNUC_PRINTF(5
	Method to return an error Janus response message (JSON) to the browser.

Janus transport plugin management
The core doesn't support any transport for the Janus API by default. In order to be able to with external clients, transport plugins are needed, e.g., to provide support for REST HTTP/HTTPS, WebSockets, RabbitMQ or others. These transport plugins are shared objects that need to implement the interfaces defined in transport.h and as such are dynamically loaded by the server at startup, and unloaded when the server closes.
void	janus_transport_close (void key, void value, void *user_data)
	Callback (g_hash_table_foreach) invoked when it's time to destroy a transport instance.

void	janus_transportso_close (void key, void value, void *user_data)
	Callback (g_hash_table_foreach) invoked when it's time to close a transport plugin.

Janus event handler plugin management
The core doesn't notify anyone, except session originators, and only then only about stuff relevant to them. In order to allow for a more apt management of core and plugin related events on a broader sense, event handler plugins are needed. These event handler plugins are shared objects that need to implement the interfaces defined in eventhandler.h and as such are dynamically loaded by the server at startup, and unloaded when the server closes.
void	janus_eventhandler_close (void key, void value, void *user_data)
	Callback (g_hash_table_foreach) invoked when it's time to destroy an eventhandler instance.

void	janus_eventhandlerso_close (void key, void value, void *user_data)
	Callback (g_hash_table_foreach) invoked when it's time to close an eventhandler plugin.

Janus external logger plugin management
By default, Janus has integrated support for logging to stdout and to a static file. Custom and advanced logging can be accomplished using additional logger plugins. These logger plugins are shared objects that need to implement the interfaces defined in logger.h and as such are dynamically loaded by the server at startup, and unloaded when the server closes.
void	janus_logger_close (void key, void value, void *user_data)
	Callback (g_hash_table_foreach) invoked when it's time to destroy a logger instance.

void	janus_loggerso_close (void key, void value, void *user_data)
	Callback (g_hash_table_foreach) invoked when it's time to close a logger plugin.

Janus plugin management
As anticipated, the server doesn't provide any specific feature: it takes care of WebRTC-related stuff, and of sending and receiving JSON-based messages. To implement applications based on these foundations, plugins can be used. These plugins are shared objects that need to implement the interfaces defined in plugin.h and as such are dynamically loaded by the server at startup, and unloaded when the server closes.
void	janus_plugin_close (void key, void value, void *user_data)
	Callback (g_hash_table_foreach) invoked when it's time to destroy a plugin instance.

void	janus_pluginso_close (void key, void value, void *user_data)
	Callback (g_hash_table_foreach) invoked when it's time to close a plugin.

janus_plugin *	janus_plugin_find (const gchar *package)
	Method to return a registered plugin instance out of its package name.

Detailed Description

Janus core (headers)

Author: Lorenzo Miniero loren.nosp@m.zo@m.nosp@m.eetec.nosp@m.ho.c.nosp@m.om

Copyright: GNU General Public License v3

Implementation of the Janus core. This code takes care of the server initialization (command line/configuration) and setup, and makes use of the available transport plugins (by default HTTP, WebSockets, RabbitMQ, if compiled) and Janus protocol (a JSON-based protocol) to interact with the applications, whether they're web based or not. The core also takes care of bridging peers and plugins accordingly, in terms of both messaging and real-time media transfer via WebRTC.

Core

Typedef Documentation

◆ janus_request

typedef struct janus_request janus_request

Helper to address requests and their sources (e.g., a specific HTTP connection, websocket, RabbitMQ or others)

◆ janus_session

typedef struct janus_session janus_session

Janus Core-Client session.

Function Documentation

◆ janus_add_public_ip()

void janus_add_public_ip ( const char * ip )

Helper method to add an IP address to use in the SDP.

◆ janus_eventhandler_close()

void janus_eventhandler_close	(	void *	key,
		void *	value,
		void *	user_data )

Callback (g_hash_table_foreach) invoked when it's time to destroy an eventhandler instance.

Parameters

[in]	key	Key of the events hash table (package name)
[in]	value	The janus_eventhandler instance to destroy
[in]	user_data	User provided data (unused)

◆ janus_eventhandlerso_close()

void janus_eventhandlerso_close	(	void *	key,
		void *	value,
		void *	user_data )

Callback (g_hash_table_foreach) invoked when it's time to close an eventhandler plugin.

Parameters

[in]	key	Key of the events hash table (package name)
[in]	value	The janus_eventhandler instance to close
[in]	user_data	User provided data (unused)

◆ janus_get_local_ip()

gchar * janus_get_local_ip ( void )

Helper method to return the local IP address (autodetected by default)

◆ janus_get_public_ip()

gchar * janus_get_public_ip ( guint index )

Helper method to return a given public IP address to use in the SDP (if multiple are configured for 1-1 NAT)

◆ janus_get_public_ip_count()

guint janus_get_public_ip_count ( void )

Helper method to return the number of public IP addresses (if configured for 1-1 NAT)

◆ janus_get_server_key()

gchar * janus_get_server_key ( void )

Helper method to return the path to the provided server certificate key.

◆ janus_get_server_pem()

gchar * janus_get_server_pem ( void )

Helper method to return the path to the provided server certificate.

◆ janus_has_public_ipv4_ip()

gboolean janus_has_public_ipv4_ip ( void )

Helper method to check if we have at least one manually passed public IPv4 address (for 1-1 NAT management)

◆ janus_has_public_ipv6_ip()

gboolean janus_has_public_ipv6_ip ( void )

Helper method to check if we have at least one manually passed public IPv6 address (for 1-1 NAT management)

◆ janus_is_stopping()

gint janus_is_stopping ( void )

Helper method to check whether the server is being shut down.

◆ janus_is_webrtc_encryption_enabled()

gboolean janus_is_webrtc_encryption_enabled ( void )

Helper method to check whether WebRTC encryption is (as it should) enabled.

Note: This is required by the ICE and DTLS portions of the code to decide whether to do the DTLS handshake, and whether SRTP encryption is required. Disabling the WebRTC encryption is supposed to be a debugging tool you can use with the Chrome setting with the same name, --disable-webrtc-encryption , and you should NEVER use it otherwise (it would simply not work with regular WebRTC endpoints).

Returns: TRUE if WebRTC encryption is enabled (the default), and FALSE otherwise

◆ janus_logger_close()

void janus_logger_close	(	void *	key,
		void *	value,
		void *	user_data )

Callback (g_hash_table_foreach) invoked when it's time to destroy a logger instance.

Parameters

[in]	key	Key of the loggers hash table (package name)
[in]	value	The janus_logger instance to destroy
[in]	user_data	User provided data (unused)

◆ janus_loggerso_close()

void janus_loggerso_close	(	void *	key,
		void *	value,
		void *	user_data )

Callback (g_hash_table_foreach) invoked when it's time to close a logger plugin.

Parameters

[in]	key	Key of the events hash table (package name)
[in]	value	The janus_logger instance to close
[in]	user_data	User provided data (unused)

◆ janus_plugin_close()

void janus_plugin_close	(	void *	key,
		void *	value,
		void *	user_data )

Callback (g_hash_table_foreach) invoked when it's time to destroy a plugin instance.

Parameters

[in]	key	Key of the plugins hash table (package name)
[in]	value	The janus_plugin plugin instance to destroy
[in]	user_data	User provided data (unused)

◆ janus_plugin_find()

janus_plugin * janus_plugin_find ( const gchar * package )

Method to return a registered plugin instance out of its package name.

Parameters

[in] package The unique package name of the plugin

Returns: The plugin instance

◆ janus_pluginso_close()

void janus_pluginso_close	(	void *	key,
		void *	value,
		void *	user_data )

Callback (g_hash_table_foreach) invoked when it's time to close a plugin.

Parameters

[in]	key	Key of the plugins hash table (package name)
[in]	value	The janus_plugin plugin instance to close
[in]	user_data	User provided data (unused)

◆ janus_process_error()

int janus_process_error	(	janus_request *	request,
		uint64_t	session_id,
		const char *	transaction,
		gint	error,
		const char *	format,
			... )

Method to return an error Janus response message (JSON) to the browser.

Parameters

[in]	request	The request instance and its source
[in]	session_id	Janus session identifier this error refers to
[in]	transaction	The Janus transaction identifier
[in]	error	The error code as defined in apierror.h
[in]	format	The printf format of the reason string, followed by a variable number of arguments, if needed; if format is NULL, a pre-configured string associated with the error code is used

Returns: 0 on success, a negative integer otherwise

◆ janus_process_incoming_admin_request()

int janus_process_incoming_admin_request ( janus_request * request )

Helper to process an incoming admin/monitor request, no matter where it comes from.

Parameters

[in] request The request instance and its source

Returns: 0 on success, a negative integer otherwise

◆ janus_process_incoming_request()

int janus_process_incoming_request ( janus_request * request )

Helper to process an incoming request, no matter where it comes from.

Parameters

[in] request The JSON request

Returns: 0 on success, a negative integer otherwise

◆ janus_process_success()

int janus_process_success	(	janus_request *	request,
		json_t *	payload )

Method to return a successful Janus response message (JSON) to the browser.

Parameters

[in]	request	The request instance and its source
[in]	payload	The payload to return as a JSON object

Returns: 0 on success, a negative integer otherwise

◆ janus_request_destroy()

void janus_request_destroy ( janus_request * request )

Helper to destroy a janus_request instance.

Parameters

[in] request The janus_request instance to destroy

Note: The opaque pointers in the instance are not destroyed, that's up to you

◆ janus_request_new()

janus_request * janus_request_new	(	janus_transport *	transport,
		janus_transport_session *	instance,
		void *	request_id,
		gboolean	admin,
		json_t *	message,
		json_error_t *	error )

Helper to allocate a janus_request instance.

Parameters

[in]	transport	Pointer to the transport
[in]	instance	Pointer to the transport-provided session instance
[in]	request_id	Opaque pointer to the request ID, if available
[in]	admin	Whether this is a Janus API or Admin API request
[in]	message	Opaque pointer to the original request, if available

Returns: A pointer to a janus_request instance if successful, NULL otherwise

◆ janus_session_create()

janus_session * janus_session_create ( guint64 session_id )

Method to create a new Janus Core-Client session.

Parameters

[in] session_id The desired Janus Core-Client session ID, or 0 if it needs to be generated randomly

Returns: The created Janus Core-Client session if successful, NULL otherwise

◆ janus_session_destroy()

gint janus_session_destroy ( janus_session * session )

Method to destroy a Janus Core-Client session.

Parameters

[in] session The Janus Core-Client session to destroy

Returns: 0 in case of success, a negative integer otherwise

◆ janus_session_find()

janus_session * janus_session_find ( guint64 session_id )

Method to find an existing Janus Core-Client session from its ID.

Parameters

[in] session_id The Janus Core-Client session ID

Returns: The created Janus Core-Client session if successful, NULL otherwise

◆ janus_session_handles_clear()

void janus_session_handles_clear ( janus_session * session )

Method to remove all Janus ICE handles from a session.

Parameters

[in] session The Janus Core-Client session

◆ janus_session_handles_find()

janus_ice_handle * janus_session_handles_find	(	janus_session *	session,
		guint64	handle_id )

Method to find an existing Janus ICE handle from its ID.

Parameters

[in]	session	The Janus Core-Client session this ICE handle belongs to
[in]	handle_id	The Janus ICE handle ID

Returns: The Janus ICE handle if successful, NULL otherwise

◆ janus_session_handles_insert()

void janus_session_handles_insert	(	janus_session *	session,
		janus_ice_handle *	handle )

Method to insert a Janus ICE handle in a session.

Parameters

[in]	session	The Janus Core-Client session
[in]	handle	The Janus ICE handle

◆ janus_session_handles_list_json()

json_t * janus_session_handles_list_json ( janus_session * session )

Method to list the IDs of all Janus ICE handles of a session as JSON.

Parameters

[in] session The Janus Core-Client session

Returns: The JSON array

◆ janus_session_handles_remove()

gint janus_session_handles_remove	(	janus_session *	session,
		janus_ice_handle *	handle )

Method to remove a Janus ICE handle from a session.

Parameters

[in]	session	The Janus Core-Client session
[in]	handle	The Janus ICE handle

Returns: The error code of janus_ice_handle_destroy

◆ janus_session_notify_event()

void janus_session_notify_event	(	janus_session *	session,
		json_t *	event )

Method to add an event to notify to the queue of notifications for this session.

Parameters

[in]	session	The Janus Core-Client session this notification is related to
[in]	event	The event to notify as a Jansson JSON object

◆ janus_transport_close()

void janus_transport_close	(	void *	key,
		void *	value,
		void *	user_data )

Callback (g_hash_table_foreach) invoked when it's time to destroy a transport instance.

Parameters

[in]	key	Key of the transports hash table (package name)
[in]	value	The janus_transport instance to destroy
[in]	user_data	User provided data (unused)

◆ janus_transportso_close()

void janus_transportso_close	(	void *	key,
		void *	value,
		void *	user_data )

Callback (g_hash_table_foreach) invoked when it's time to close a transport plugin.

Parameters

[in]	key	Key of the transports hash table (package name)
[in]	value	The janus_transport instance to close
[in]	user_data	User provided data (unused)

Data Structures

Typedefs

Functions

Detailed Description

Typedef Documentation

◆ janus_request

◆ janus_session

Function Documentation

◆ janus_add_public_ip()

◆ janus_eventhandler_close()

◆ janus_eventhandlerso_close()

◆ janus_get_local_ip()

◆ janus_get_public_ip()

◆ janus_get_public_ip_count()

◆ janus_get_server_key()

◆ janus_get_server_pem()

◆ janus_has_public_ipv4_ip()

◆ janus_has_public_ipv6_ip()

◆ janus_is_stopping()

◆ janus_is_webrtc_encryption_enabled()

◆ janus_logger_close()

◆ janus_loggerso_close()

◆ janus_plugin_close()

◆ janus_plugin_find()

◆ janus_pluginso_close()

◆ janus_process_error()

◆ janus_process_incoming_admin_request()

◆ janus_process_incoming_request()

◆ janus_process_success()

◆ janus_request_destroy()

◆ janus_request_new()

◆ janus_session_create()

◆ janus_session_destroy()

◆ janus_session_find()

◆ janus_session_handles_clear()

◆ janus_session_handles_find()

◆ janus_session_handles_insert()

◆ janus_session_handles_list_json()

◆ janus_session_handles_remove()

◆ janus_session_notify_event()

◆ janus_transport_close()

◆ janus_transportso_close()