bridge_basic.c File Reference

Basic bridge class. It is a subclass of struct ast_bridge. More...

#include "asterisk.h"
#include "asterisk/channel.h"
#include "asterisk/utils.h"
#include "asterisk/linkedlists.h"
#include "asterisk/bridge.h"
#include "asterisk/bridge_internal.h"
#include "asterisk/bridge_basic.h"
#include "asterisk/bridge_after.h"
#include "asterisk/astobj2.h"
#include "asterisk/features_config.h"
#include "asterisk/pbx.h"
#include "asterisk/file.h"
#include "asterisk/app.h"
#include "asterisk/dial.h"
#include "asterisk/stasis_bridges.h"
#include "asterisk/stasis_channels.h"
#include "asterisk/features.h"
#include "asterisk/format_cache.h"
#include "asterisk/test.h"

Include dependency graph for bridge_basic.c:

Go to the source code of this file.

Data Structures
struct	attended_transfer_properties
	Collection of data related to an attended transfer attempt. More...
struct	attended_transfer_state_properties
	Properties of an attended transfer state. More...
struct	bridge_basic_personality
	structure that organizes different personalities for basic bridges. More...
struct	dynamic_dtmf_hook_data
struct	dynamic_dtmf_hook_run
struct	personality_details
	Details for specific basic bridge personalities. More...
struct	stimulus_list

Macros
#define	NORMAL_FLAGS
#define	TRANSFER_FLAGS   AST_BRIDGE_FLAG_SMART

Enumerations
enum	attended_transfer_state {   TRANSFER_CALLING_TARGET , TRANSFER_HESITANT , TRANSFER_REBRIDGE , TRANSFER_RESUME ,   TRANSFER_THREEWAY , TRANSFER_CONSULTING , TRANSFER_DOUBLECHECKING , TRANSFER_COMPLETE ,   TRANSFER_BLOND , TRANSFER_BLOND_NONFINAL , TRANSFER_RECALLING , TRANSFER_WAIT_TO_RETRANSFER ,   TRANSFER_RETRANSFER , TRANSFER_WAIT_TO_RECALL , TRANSFER_FAIL }
enum	attended_transfer_state_flags {   TRANSFER_STATE_FLAG_TIMER_RESET = (1 << 0) , TRANSFER_STATE_FLAG_TIMER_LOOP_DELAY = (1 << 1) , TRANSFER_STATE_FLAG_ATXFER_NO_ANSWER = (1 << 2) , TRANSFER_STATE_FLAG_TIMED ,   TRANSFER_STATE_FLAG_TERMINAL = (1 << 3) }
	Flags that indicate properties of attended transfer states. More...
enum	attended_transfer_stimulus {   STIMULUS_NONE , STIMULUS_TRANSFEREE_HANGUP , STIMULUS_TRANSFERER_HANGUP , STIMULUS_TRANSFER_TARGET_HANGUP ,   STIMULUS_TRANSFER_TARGET_ANSWER , STIMULUS_RECALL_TARGET_HANGUP , STIMULUS_RECALL_TARGET_ANSWER , STIMULUS_TIMEOUT ,   STIMULUS_DTMF_ATXFER_ABORT , STIMULUS_DTMF_ATXFER_COMPLETE , STIMULUS_DTMF_ATXFER_THREEWAY , STIMULUS_DTMF_ATXFER_SWAP }
	Stimuli that can cause transfer state changes. More...
enum	attended_transfer_superstate { SUPERSTATE_TRANSFER , SUPERSTATE_RECALL }
	Attended transfer superstates. More...
enum	bridge_basic_personality_type { BRIDGE_BASIC_PERSONALITY_NORMAL , BRIDGE_BASIC_PERSONALITY_ATXFER , BRIDGE_BASIC_PERSONALITY_END }

Functions
static int	add_normal_hooks (struct ast_bridge *bridge, struct ast_bridge_channel *bridge_channel)
static int	add_transferer_role (struct ast_channel *chan, struct ast_bridge_features_attended_transfer *attended_transfer)
struct ast_bridge *	ast_bridge_basic_new (void)
	Create a new basic class bridge. More...
void	ast_bridge_basic_set_flags (struct ast_bridge *bridge, unsigned int flags)
	Set feature flags on a basic bridge. More...
int	ast_bridge_features_ds_append (struct ast_channel *chan, struct ast_flags *flags)
	Append basic bridge DTMF feature flags on the channel. More...
struct ast_flags *	ast_bridge_features_ds_get (struct ast_channel *chan)
	Get DTMF feature flags from the channel. More...
int	ast_bridge_features_ds_get_string (struct ast_channel *chan, char *buffer, size_t buf_size)
	writes a channel's DTMF features to a buffer string More...
int	ast_bridge_features_ds_set (struct ast_channel *chan, struct ast_flags *flags)
	Set basic bridge DTMF feature flags datastore on the channel. More...
int	ast_bridge_features_ds_set_string (struct ast_channel *chan, const char *features)
	Sets the features a channel will use upon being bridged. More...
void	ast_bridging_init_basic (void)
static int	attach_framehook (struct attended_transfer_properties *props, struct ast_channel *channel)
static void *	attended_transfer_monitor_thread (void *data)
	The main loop for the attended transfer monitor thread. More...
static struct attended_transfer_properties *	attended_transfer_properties_alloc (struct ast_channel *transferer, const char *context)
	Allocate and initialize attended transfer properties. More...
static void	attended_transfer_properties_destructor (void *obj)
static void	attended_transfer_properties_shutdown (struct attended_transfer_properties *props)
	Initiate shutdown of attended transfer properties. More...
static int	atxfer_abort (struct ast_bridge_channel *bridge_channel, void *hook_pvt)
	DTMF hook when transferer presses abort sequence. More...
static int	atxfer_complete (struct ast_bridge_channel *bridge_channel, void *hook_pvt)
	DTMF hook when transferer presses complete sequence. More...
static int	atxfer_swap (struct ast_bridge_channel *bridge_channel, void *hook_pvt)
	DTMF hook when transferer presses swap sequence. More...
static int	atxfer_threeway (struct ast_bridge_channel *bridge_channel, void *hook_pvt)
	DTMF hook when transferer presses threeway sequence. More...
static int	atxfer_transferer_hangup (struct ast_bridge_channel *bridge_channel, void *hook_pvt)
	Hangup hook for transferer channel. More...
static int	basic_hangup_hook (struct ast_bridge_channel *bridge_channel, void *hook_pvt)
static void	blind_transfer_cb (struct ast_channel *new_channel, struct transfer_channel_data *user_data_wrapper, enum ast_transfer_type transfer_type)
static int	blond_enter (struct attended_transfer_properties *props)
static int	blond_nonfinal_enter (struct attended_transfer_properties *props)
static enum attended_transfer_state	blond_nonfinal_exit (struct attended_transfer_properties *props, enum attended_transfer_stimulus stimulus)
static void	bridge_basic_change_personality (struct ast_bridge *bridge, enum bridge_basic_personality_type type, void *user_data)
	Change basic bridge personality. More...
static void	bridge_basic_destroy (struct ast_bridge *self)
static struct ast_bridge *	bridge_basic_personality_alloc (struct ast_bridge *bridge)
static void	bridge_basic_pull (struct ast_bridge *self, struct ast_bridge_channel *bridge_channel)
static int	bridge_basic_push (struct ast_bridge *self, struct ast_bridge_channel *bridge_channel, struct ast_bridge_channel *swap)
static int	bridge_basic_setup_features (struct ast_bridge_channel *bridge_channel)
static int	bridge_features_ds_set_full (struct ast_channel *chan, struct ast_flags *flags, int replace)
static void	bridge_hold (struct ast_bridge *bridge)
	Helper method to send a hold frame to all channels in a bridge. More...
static void	bridge_merge (struct ast_bridge *dest, struct ast_bridge *src, struct ast_channel **kick_channels, unsigned int num_channels)
	Wrapper for bridge_do_merge. More...
static void	bridge_move (struct ast_bridge *dest, struct ast_bridge *src, struct ast_channel *channel, struct ast_channel *swap)
	Wrapper for bridge_do_move. More...
static void	bridge_personality_atxfer_pull (struct ast_bridge *self, struct ast_bridge_channel *bridge_channel)
static int	bridge_personality_atxfer_push (struct ast_bridge *self, struct ast_bridge_channel *bridge_channel, struct ast_bridge_channel *swap)
static int	bridge_personality_normal_push (struct ast_bridge *self, struct ast_bridge_channel *bridge_channel, struct ast_bridge_channel *swap)
static void	bridge_ringing (struct ast_bridge *bridge)
	Helper method to send a ringing indication to all channels in a bridge. More...
static void	bridge_unhold (struct ast_bridge *bridge)
	Helper method to send an unhold frame to all channels in a bridge. More...
static int	build_dtmf_features (struct ast_flags *flags, const char *features)
static int	builtin_feature_get_exten (struct ast_channel *chan, const char *feature_name, char *buf, size_t len)
static int	builtin_features_helper (struct ast_bridge_features *features, struct ast_channel *chan, struct ast_flags *flags, unsigned int feature_flag, const char *feature_name, enum ast_bridge_builtin_feature feature_bridge)
static int	calling_target_enter (struct attended_transfer_properties *props)
static enum attended_transfer_state	calling_target_exit (struct attended_transfer_properties *props, enum attended_transfer_stimulus stimulus)
static void	clear_stimulus_queue (struct attended_transfer_properties *props)
	Free backlog of stimuli in the queue. More...
static void	common_recall_channel_setup (struct ast_channel *recall, struct ast_channel *transferer)
static int	complete_enter (struct attended_transfer_properties *props)
static int	consulting_enter (struct attended_transfer_properties *props)
static enum attended_transfer_state	consulting_exit (struct attended_transfer_properties *props, enum attended_transfer_stimulus stimulus)
static void	copy_caller_data (struct ast_channel *dest, struct ast_channel *caller)
static struct ast_channel *	dial_transfer (struct ast_channel *caller, const char *destination)
	Helper function that creates an outgoing channel and returns it immediately. More...
static int	double_checking_enter (struct attended_transfer_properties *props)
static enum attended_transfer_state	double_checking_exit (struct attended_transfer_properties *props, enum attended_transfer_stimulus stimulus)
static int	dtmf_features_flags_to_string (struct ast_flags *feature_flags, char *buffer, size_t buffer_size)
static int	dynamic_dtmf_hook_add (struct ast_bridge_features *features, unsigned int flags, const char *dtmf, const char *feature_name, const char *app_name, const char *app_args, const char *moh_class)
static void	dynamic_dtmf_hook_callback (struct ast_bridge_channel *bridge_channel, const void *payload, size_t payload_size)
static int	dynamic_dtmf_hook_trip (struct ast_bridge_channel *bridge_channel, void *hook_pvt)
static int	fail_enter (struct attended_transfer_properties *props)
static int	feature_attended_transfer (struct ast_bridge_channel *bridge_channel, void *hook_pvt)
	Internal built in feature for attended transfers. More...
static int	feature_blind_transfer (struct ast_bridge_channel *bridge_channel, void *hook_pvt)
	Internal built in feature for blind transfers. More...
static const char *	get_transfer_context (struct ast_channel *transferer, const char *context)
static const char *	get_transfer_exten (struct ast_channel *transferer, const char *exten)
static void	get_transfer_parties (struct ast_channel *transferer, struct ast_bridge *transferee_bridge, struct ast_bridge *target_bridge, struct ast_channel **transferee, struct ast_channel **transfer_target)
	determine transferee and transfer target for an attended transfer More...
static void	get_transfer_parties_transferer_bridge (struct ast_bridge *transferer_bridge, struct ast_bridge *other_bridge, struct ast_channel *transferer, struct ast_channel **transferer_peer, struct ast_channel **other_party)
	Get the transferee and transfer target when the transferer is in a bridge with one of the desired parties. More...
static void	get_transfer_party_non_transferer_bridge (struct ast_bridge *bridge, struct ast_channel **party)
	Get a desired transfer party for a bridge the transferer is not in. More...
static int	grab_transfer (struct ast_channel *chan, char *exten, size_t exten_len, const char *context)
	Helper function that presents dialtone and grabs extension. More...
static int	hesitant_enter (struct attended_transfer_properties *props)
static enum attended_transfer_state	hesitant_exit (struct attended_transfer_properties *props, enum attended_transfer_stimulus stimulus)
static void	hold (struct ast_channel *chan)
	Helper method to place a channel in a bridge on hold. More...
static void	init_details (struct personality_details *details, enum bridge_basic_personality_type type)
static void	on_personality_change_normal (struct ast_bridge *bridge)
static void	personality_destructor (void *obj)
static void	play_failsound (struct ast_channel *chan)
	Helper method to play a fail sound on a channel in a bridge. More...
static void	play_sound (struct ast_channel *chan, const char *sound)
	Helper method to play a sound on a channel in a bridge. More...
static void	publish_transfer_fail (struct attended_transfer_properties *props)
	Send a stasis publication for a failed attended transfer. More...
static void	publish_transfer_success (struct attended_transfer_properties *props, struct ast_channel *transferee_channel, struct ast_channel *target_channel)
	Send a stasis publication for a successful attended transfer. More...
static void	publish_transfer_threeway (struct attended_transfer_properties *props, struct ast_channel *transferee_channel, struct ast_channel *target_channel)
	Send a stasis publication for an attended transfer that ends in a threeway call. More...
static int	rebridge_enter (struct attended_transfer_properties *props)
static void	recall_callback (struct ast_dial *dial)
	Dial callback when attempting to recall the original transferer channel. More...
static void	recall_pull (struct ast_bridge *self, struct ast_bridge_channel *bridge_channel, struct attended_transfer_properties *props)
static int	recalling_enter (struct attended_transfer_properties *props)
static enum attended_transfer_state	recalling_exit (struct attended_transfer_properties *props, enum attended_transfer_stimulus stimulus)
static void	remove_attended_transfer_stimulus (struct attended_transfer_properties *props, enum attended_transfer_stimulus stimulus)
static void	remove_hooks_on_personality_change (struct ast_bridge *bridge)
	Remove appropriate hooks when basic bridge personality changes. More...
static int	resume_enter (struct attended_transfer_properties *props)
static int	retransfer_enter (struct attended_transfer_properties *props)
static enum attended_transfer_state	retransfer_exit (struct attended_transfer_properties *props, enum attended_transfer_stimulus stimulus)
static void	ringing (struct ast_channel *chan)
	Helper method to send a ringing indication to a channel in a bridge. More...
static int	set_feature_flag_from_char (struct ast_flags *feature_flags, char feature)
static int	setup_bridge_features_builtin (struct ast_bridge_features *features, struct ast_channel *chan)
static int	setup_bridge_features_dynamic (struct ast_bridge_features *features, struct ast_channel *chan)
static int	setup_dynamic_feature (void *obj, void *arg, void *data, int flags)
static void	stimulate_attended_transfer (struct attended_transfer_properties *props, enum attended_transfer_stimulus stimulus)
static void	stream_failsound (struct ast_channel *chan)
	Helper method to stream a fail sound on a channel. More...
static int	threeway_enter (struct attended_transfer_properties *props)
static void	transfer_pull (struct ast_bridge *self, struct ast_bridge_channel *bridge_channel, struct attended_transfer_properties *props)
static struct ast_frame *	transfer_target_framehook_cb (struct ast_channel *chan, struct ast_frame *frame, enum ast_framehook_event event, void *data)
	Frame hook for transfer target channel. More...
static int	transfer_target_framehook_consume (void *data, enum ast_frame_type type)
	Callback function which informs upstream if we are consuming a frame of a specific type. More...
static void	transfer_target_framehook_destroy_cb (void *data)
static void	unhold (struct ast_channel *chan)
	Helper method to take a channel in a bridge off hold. More...
static enum attended_transfer_stimulus	wait_for_stimulus (struct attended_transfer_properties *props)
static int	wait_to_recall_enter (struct attended_transfer_properties *props)
static enum attended_transfer_state	wait_to_recall_exit (struct attended_transfer_properties *props, enum attended_transfer_stimulus stimulus)
static int	wait_to_retransfer_enter (struct attended_transfer_properties *props)
static enum attended_transfer_state	wait_to_retransfer_exit (struct attended_transfer_properties *props, enum attended_transfer_stimulus stimulus)

Variables
struct ast_bridge_methods	ast_bridge_basic_v_table
	Bridge basic class virtual method table. More...
static const struct ast_datastore_info	dtmf_features_info
struct ast_bridge_methods	personality_atxfer_v_table
struct ast_bridge_methods	personality_normal_v_table
static const struct attended_transfer_state_properties	state_properties []
const char *	stimulus_strs []
	String representations of the various stimuli. More...

Detailed Description

Basic bridge class. It is a subclass of struct ast_bridge.

Author

Richard Mudgett rmudg.nosp@m.ett@.nosp@m.digiu.nosp@m.m.co.nosp@m.m

See Also:

• CREDITS

Definition in file bridge_basic.c.

Macro Definition Documentation

NORMAL_FLAGS

#define NORMAL_FLAGS

Value:

            (AST_BRIDGE_FLAG_DISSOLVE_HANGUP | AST_BRIDGE_FLAG_DISSOLVE_EMPTY \
            | AST_BRIDGE_FLAG_SMART)

Definition at line 51 of file bridge_basic.c.

TRANSFER_FLAGS

#define TRANSFER_FLAGS   AST_BRIDGE_FLAG_SMART

Definition at line 54 of file bridge_basic.c.

Enumeration Type Documentation

attended_transfer_state

enum attended_transfer_state

The states in the attended transfer state machine.

Enumerator
TRANSFER_CALLING_TARGET	Calling Target state. This state describes the initial state of a transfer. The transferer waits in the transfer target's bridge for the transfer target to answer. Superstate: Transfer Preconditions: 1) Transfer target is RINGING 2) Transferer is in transferee bridge 3) Transferee is on hold Transitions to TRANSFER_CALLING_TARGET: 1) This is the initial state for an attended transfer. 2) TRANSFER_HESITANT: Transferer presses DTMF swap sequence State operation: The transferer is moved from the transferee bridge into the transfer target bridge. Transitions from TRANSFER_CALLING_TARGET: 1) TRANSFER_FAIL: Transferee hangs up. 2) TRANSFER_BLOND: Transferer hangs up or presses DTMF swap sequence and configured atxferdropcall setting is yes. 3) TRANSFER_BLOND_NONFINAL: Transferer hangs up or presses DTMF swap sequence and configured atxferdropcall setting is no. 4) TRANSFER_CONSULTING: Transfer target answers the call. 5) TRANSFER_REBRIDGE: Transfer target hangs up, call to transfer target times out, or transferer presses DTMF abort sequence. 6) TRANSFER_THREEWAY: Transferer presses DTMF threeway sequence. 7) TRANSFER_HESITANT: Transferer presses DTMF swap sequence.
TRANSFER_HESITANT	Hesitant state. This state only arises if when waiting for the transfer target to answer, the transferer presses the DTMF swap sequence. This will cause the transferer to be rebridged with the transferee temporarily. Superstate: Transfer Preconditions: 1) Transfer target is in ringing state 2) Transferer is in transfer target bridge 3) Transferee is on hold Transitions to TRANSFER_HESITANT: 1) TRANSFER_CALLING_TARGET: Transferer presses DTMF swap sequence. State operation: The transferer is moved from the transfer target bridge into the transferee bridge, and the transferee is taken off hold. Transitions from TRANSFER_HESITANT: 1) TRANSFER_FAIL: Transferee hangs up 2) TRANSFER_BLOND: Transferer hangs up or presses DTMF swap sequence and configured atxferdropcall setting is yes. 3) TRANSFER_BLOND_NONFINAL: Transferer hangs up or presses DTMF swap sequence and configured atxferdropcall setting is no. 4) TRANSFER_DOUBLECHECKING: Transfer target answers the call 5) TRANSFER_RESUME: Transfer target hangs up, call to transfer target times out, or transferer presses DTMF abort sequence. 6) TRANSFER_THREEWAY: Transferer presses DTMF threeway sequence. 7) TRANSFER_CALLING_TARGET: Transferer presses DTMF swap sequence.
TRANSFER_REBRIDGE	Rebridge state. This is a terminal state that indicates that the transferer needs to move back to the transferee's bridge. This is a failed attended transfer result. Superstate: Transfer Preconditions: 1) Transferer is in transfer target bridge 2) Transferee is on hold Transitions to TRANSFER_REBRIDGE: 1) TRANSFER_CALLING_TARGET: Transfer target hangs up, call to transfer target times out, or transferer presses DTMF abort sequence. 2) TRANSFER_STATE_CONSULTING: Transfer target hangs up, or transferer presses DTMF abort sequence. State operation: The transferer channel is moved from the transfer target bridge to the transferee bridge. The transferee is taken off hold. A stasis transfer message is published indicating a failed attended transfer. Transitions from TRANSFER_REBRIDGE: None
TRANSFER_RESUME	Resume state. This is a terminal state that indicates that the party bridged with the transferee is the final party to be bridged with that transferee. This state may come about due to a successful recall or due to a failed transfer. Superstate: Transfer or Recall Preconditions: In Transfer Superstate: 1) Transferer is in transferee bridge 2) Transferee is not on hold In Recall Superstate: 1) The recall target is in the transferee bridge 2) Transferee is not on hold Transitions to TRANSFER_RESUME: TRANSFER_HESITANT: Transfer target hangs up, call to transfer target times out, or transferer presses DTMF abort sequence. TRANSFER_DOUBLECHECKING: Transfer target hangs up or transferer presses DTMF abort sequence. TRANSFER_BLOND_NONFINAL: Recall target answers TRANSFER_RECALLING: Recall target answers TRANSFER_RETRANSFER: Recall target answers State operations: None Transitions from TRANSFER_RESUME: None
TRANSFER_THREEWAY	Threeway state. This state results when the transferer wishes to have all parties involved in a transfer to be in the same bridge together. Superstate: Transfer Preconditions: 1) Transfer target state is either RINGING or UP 2) Transferer is in either bridge 3) Transferee is not on hold Transitions to TRANSFER_THREEWAY: 1) TRANSFER_CALLING_TARGET: Transferer presses DTMF threeway sequence. 2) TRANSFER_HESITANT: Transferer presses DTMF threeway sequence. 3) TRANSFER_CONSULTING: Transferer presses DTMF threeway sequence. 4) TRANSFER_DOUBLECHECKING: Transferer presses DTMF threeway sequence. State operation: The transfer target bridge is merged into the transferee bridge. Transitions from TRANSFER_THREEWAY: None.
TRANSFER_CONSULTING	Consulting state. This state describes the case where the transferer and transfer target are able to converse in the transfer target's bridge prior to completing the transfer. Superstate: Transfer Preconditions: 1) Transfer target is UP 2) Transferer is in target bridge 3) Transferee is on hold Transitions to TRANSFER_CONSULTING: 1) TRANSFER_CALLING_TARGET: Transfer target answers. 2) TRANSFER_DOUBLECHECKING: Transferer presses DTMF swap sequence. State operations: None. Transitions from TRANSFER_CONSULTING: TRANSFER_COMPLETE: Transferer hangs up or transferer presses DTMF complete sequence. TRANSFER_REBRIDGE: Transfer target hangs up or transferer presses DTMF abort sequence. TRANSFER_THREEWAY: Transferer presses DTMF threeway sequence. TRANSFER_DOUBLECHECKING: Transferer presses DTMF swap sequence.
TRANSFER_DOUBLECHECKING	Double-checking state. This state describes the case where the transferer and transferee are able to converse in the transferee's bridge prior to completing the transfer. The difference between this and TRANSFER_HESITANT is that the transfer target is UP in this case. Superstate: Transfer Preconditions: 1) Transfer target is UP and on hold 2) Transferer is in transferee bridge 3) Transferee is off hold Transitions to TRANSFER_DOUBLECHECKING: 1) TRANSFER_HESITANT: Transfer target answers. 2) TRANSFER_CONSULTING: Transferer presses DTMF swap sequence. State operations: None. Transitions from TRANSFER_DOUBLECHECKING: 1) TRANSFER_FAIL: Transferee hangs up. 2) TRANSFER_COMPLETE: Transferer hangs up or presses DTMF complete sequence. 3) TRANSFER_RESUME: Transfer target hangs up or transferer presses DTMF abort sequence. 4) TRANSFER_THREEWAY: Transferer presses DTMF threeway sequence. 5) TRANSFER_CONSULTING: Transferer presses the DTMF swap sequence.
TRANSFER_COMPLETE	Complete state. This is a terminal state where a transferer has successfully completed an attended transfer. This state's goal is to get the transfer target and transferee into the same bridge and the transferer off the call. Superstate: Transfer Preconditions: 1) Transfer target is UP and off hold. 2) Transferer is in either bridge. 3) Transferee is off hold. Transitions to TRANSFER_COMPLETE: 1) TRANSFER_CONSULTING: transferer hangs up or presses the DTMF complete sequence. 2) TRANSFER_DOUBLECHECKING: transferer hangs up or presses the DTMF complete sequence. State operation: The transfer target bridge is merged into the transferee bridge. The transferer channel is kicked out of the bridges as part of the merge. State operations: 1) Merge the transfer target bridge into the transferee bridge, excluding the transferer channel from the merge. 2) Publish a stasis transfer message. Exit operations: This is a terminal state, so there are no exit operations.
TRANSFER_BLOND	Blond state. This is a terminal state where a transferer has completed an attended transfer prior to the transfer target answering. This state is only entered if atxferdropcall is set to 'yes'. This is considered to be a successful attended transfer. Superstate: Transfer Preconditions: 1) Transfer target is RINGING. 2) Transferer is in either bridge. 3) Transferee is off hold. Transitions to TRANSFER_BLOND: 1) TRANSFER_CALLING_TARGET: Transferer hangs up or presses the DTMF complete sequence. atxferdropcall is set to 'yes'. 2) TRANSFER_HESITANT: Transferer hangs up or presses the DTMF complete sequence. atxferdropcall is set to 'yes'. State operations: The transfer target bridge is merged into the transferee bridge. The transferer channel is kicked out of the bridges as part of the merge. A stasis transfer publication is sent indicating a successful transfer. Transitions from TRANSFER_BLOND: None
TRANSFER_BLOND_NONFINAL	Blond non-final state. This state is very similar to the TRANSFER_BLOND state, except that this state is entered when atxferdropcall is set to 'no'. This is the initial state of the Recall superstate, so state operations mainly involve moving to the Recall superstate. This means that the transfer target, that is currently ringing is now known as the recall target. Superstate: Recall Preconditions: 1) Recall target is RINGING. 2) Transferee is off hold. Transitions to TRANSFER_BLOND_NONFINAL: 1) TRANSFER_CALLING_TARGET: Transferer hangs up or presses the DTMF complete sequence. atxferdropcall is set to 'no'. 2) TRANSFER_HESITANT: Transferer hangs up or presses the DTMF complete sequence. atxferdropcall is set to 'no'. State operation: The superstate of the attended transfer is changed from Transfer to Recall. The transfer target bridge is merged into the transferee bridge. The transferer channel is kicked out of the bridges as part of the merge. Transitions from TRANSFER_BLOND_NONFINAL: 1) TRANSFER_FAIL: Transferee hangs up 2) TRANSFER_RESUME: Recall target answers 3) TRANSFER_RECALLING: Recall target hangs up or time expires.
TRANSFER_RECALLING	Recalling state. This state is entered if the recall target from the TRANSFER_BLOND_NONFINAL or TRANSFER_RETRANSFER states hangs up or does not answer. The goal of this state is to call back the original transferer in an attempt to recover the original call. Superstate: Recall Preconditions: 1) Recall target is down. 2) Transferee is off hold. Transitions to TRANSFER_RECALLING: 1) TRANSFER_BLOND_NONFINAL: Recall target hangs up or time expires. 2) TRANSFER_RETRANSFER: Recall target hangs up or time expires. atxferloopdelay is non-zero. 3) TRANSFER_WAIT_TO_RECALL: Time expires. State operation: The original transferer becomes the recall target and is called using the Dialing API. Ringing is indicated to the transferee. Transitions from TRANSFER_RECALLING: 1) TRANSFER_FAIL: a) Transferee hangs up. b) Recall target hangs up or time expires, and number of recall attempts exceeds atxfercallbackretries 2) TRANSFER_WAIT_TO_RETRANSFER: Recall target hangs up or time expires. atxferloopdelay is non-zero. 3) TRANSFER_RETRANSFER: Recall target hangs up or time expires. atxferloopdelay is zero. 4) TRANSFER_RESUME: Recall target answers.
TRANSFER_WAIT_TO_RETRANSFER	Wait to Retransfer state. This state is used simply to give a bit of breathing room between attempting to call back the original transferer and attempting to call back the original transfer target. The transferee hears music on hold during this state as an auditory clue that no one is currently being dialed. Superstate: Recall Preconditions: 1) Recall target is down. 2) Transferee is off hold. Transitions to TRANSFER_WAIT_TO_RETRANSFER: 1) TRANSFER_RECALLING: Recall target hangs up or time expires. atxferloopdelay is non-zero. State operation: The transferee is placed on hold. Transitions from TRANSFER_WAIT_TO_RETRANSFER: 1) TRANSFER_FAIL: Transferee hangs up. 2) TRANSFER_RETRANSFER: Time expires.
TRANSFER_RETRANSFER	Retransfer state. This state is used in order to attempt to call back the original transfer target channel from the transfer. The transferee hears ringing during this state as an auditory cue that a party is being dialed. Superstate: Recall Preconditions: 1) Recall target is down. 2) Transferee is off hold. Transitions to TRANSFER_RETRANSFER: 1) TRANSFER_RECALLING: Recall target hangs up or time expires. atxferloopdelay is zero. 2) TRANSFER_WAIT_TO_RETRANSFER: Time expires. State operation: The original transfer target is requested and is set as the recall target. The recall target is called and placed into the transferee bridge. Transitions from TRANSFER_RETRANSFER: 1) TRANSFER_FAIL: Transferee hangs up. 2) TRANSFER_WAIT_TO_RECALL: Recall target hangs up or time expires. atxferloopdelay is non-zero. 3) TRANSFER_RECALLING: Recall target hangs up or time expires. atxferloopdelay is zero.
TRANSFER_WAIT_TO_RECALL	Wait to recall state. This state is used simply to give a bit of breathing room between attempting to call back the original transfer target and attempting to call back the original transferer. The transferee hears music on hold during this state as an auditory clue that no one is currently being dialed. Superstate: Recall Preconditions: 1) Recall target is down. 2) Transferee is off hold. Transitions to TRANSFER_WAIT_TO_RECALL: 1) TRANSFER_RETRANSFER: Recall target hangs up or time expires. atxferloopdelay is non-zero. State operation: Transferee is placed on hold. Transitions from TRANSFER_WAIT_TO_RECALL: 1) TRANSFER_FAIL: Transferee hangs up 2) TRANSFER_RECALLING: Time expires
TRANSFER_FAIL	Fail state. This state indicates that something occurred during the transfer that makes a graceful completion impossible. The most common stimulus for this state is when the transferee hangs up. Superstate: Transfer and Recall Preconditions: None Transitions to TRANSFER_FAIL: 1) TRANSFER_CALLING_TARGET: Transferee hangs up. 2) TRANSFER_HESITANT: Transferee hangs up. 3) TRANSFER_DOUBLECHECKING: Transferee hangs up. 4) TRANSFER_BLOND_NONFINAL: Transferee hangs up. 5) TRANSFER_RECALLING: a) Transferee hangs up. b) Recall target hangs up or time expires, and number of recall attempts exceeds atxfercallbackretries. 6) TRANSFER_WAIT_TO_RETRANSFER: Transferee hangs up. 7) TRANSFER_RETRANSFER: Transferee hangs up. 8) TRANSFER_WAIT_TO_RECALL: Transferee hangs up. State operation: A transfer stasis publication is made indicating a failed transfer. The transferee bridge is destroyed. Transitions from TRANSFER_FAIL: None.

Definition at line 773 of file bridge_basic.c.

                             {
    /*!
     * \brief Calling Target state
     *
     * This state describes the initial state of a transfer. The transferer
     * waits in the transfer target's bridge for the transfer target to answer.
     *
     * Superstate: Transfer
     *
     * Preconditions:
     * 1) Transfer target is RINGING
     * 2) Transferer is in transferee bridge
     * 3) Transferee is on hold
     *
     * Transitions to TRANSFER_CALLING_TARGET:
     * 1) This is the initial state for an attended transfer.
     * 2) TRANSFER_HESITANT: Transferer presses DTMF swap sequence
     *
     * State operation:
     * The transferer is moved from the transferee bridge into the transfer
     * target bridge.
     *
     * Transitions from TRANSFER_CALLING_TARGET:
     * 1) TRANSFER_FAIL: Transferee hangs up.
     * 2) TRANSFER_BLOND: Transferer hangs up or presses DTMF swap sequence
     * and configured atxferdropcall setting is yes.
     * 3) TRANSFER_BLOND_NONFINAL: Transferer hangs up or presses DTMF swap
     * sequence and configured atxferdropcall setting is no.
     * 4) TRANSFER_CONSULTING: Transfer target answers the call.
     * 5) TRANSFER_REBRIDGE: Transfer target hangs up, call to transfer target
     * times out, or transferer presses DTMF abort sequence.
     * 6) TRANSFER_THREEWAY: Transferer presses DTMF threeway sequence.
     * 7) TRANSFER_HESITANT: Transferer presses DTMF swap sequence.
     */
    TRANSFER_CALLING_TARGET,
    /*!
     * \brief Hesitant state
     *
     * This state only arises if when waiting for the transfer target to
     * answer, the transferer presses the DTMF swap sequence. This will
     * cause the transferer to be rebridged with the transferee temporarily.
     *
     * Superstate: Transfer
     *
     * Preconditions:
     * 1) Transfer target is in ringing state
     * 2) Transferer is in transfer target bridge
     * 3) Transferee is on hold
     *
     * Transitions to TRANSFER_HESITANT:
     * 1) TRANSFER_CALLING_TARGET: Transferer presses DTMF swap sequence.
     *
     * State operation:
     * The transferer is moved from the transfer target bridge into the
     * transferee bridge, and the transferee is taken off hold.
     *
     * Transitions from TRANSFER_HESITANT:
     * 1) TRANSFER_FAIL: Transferee hangs up
     * 2) TRANSFER_BLOND: Transferer hangs up or presses DTMF swap sequence
     * and configured atxferdropcall setting is yes.
     * 3) TRANSFER_BLOND_NONFINAL: Transferer hangs up or presses DTMF swap
     * sequence and configured atxferdropcall setting is no.
     * 4) TRANSFER_DOUBLECHECKING: Transfer target answers the call
     * 5) TRANSFER_RESUME: Transfer target hangs up, call to transfer target
     * times out, or transferer presses DTMF abort sequence.
     * 6) TRANSFER_THREEWAY: Transferer presses DTMF threeway sequence.
     * 7) TRANSFER_CALLING_TARGET: Transferer presses DTMF swap sequence.
     */
    TRANSFER_HESITANT,
    /*!
     * \brief Rebridge state
     *
     * This is a terminal state that indicates that the transferer needs
     * to move back to the transferee's bridge. This is a failed attended
     * transfer result.
     *
     * Superstate: Transfer
     *
     * Preconditions:
     * 1) Transferer is in transfer target bridge
     * 2) Transferee is on hold
     *
     * Transitions to TRANSFER_REBRIDGE:
     * 1) TRANSFER_CALLING_TARGET: Transfer target hangs up, call to transfer target
     * times out, or transferer presses DTMF abort sequence.
     * 2) TRANSFER_STATE_CONSULTING: Transfer target hangs up, or transferer presses
     * DTMF abort sequence.
     *
     * State operation:
     * The transferer channel is moved from the transfer target bridge to the
     * transferee bridge. The transferee is taken off hold. A stasis transfer
     * message is published indicating a failed attended transfer.
     *
     * Transitions from TRANSFER_REBRIDGE:
     * None
     */
    TRANSFER_REBRIDGE,
    /*!
     * \brief Resume state
     *
     * This is a terminal state that indicates that the party bridged with the
     * transferee is the final party to be bridged with that transferee. This state
     * may come about due to a successful recall or due to a failed transfer.
     *
     * Superstate: Transfer or Recall
     *
     * Preconditions:
     * In Transfer Superstate:
     * 1) Transferer is in transferee bridge
     * 2) Transferee is not on hold
     * In Recall Superstate:
     * 1) The recall target is in the transferee bridge
     * 2) Transferee is not on hold
     *
     * Transitions to TRANSFER_RESUME:
     * TRANSFER_HESITANT: Transfer target hangs up, call to transfer target times out,
     * or transferer presses DTMF abort sequence.
     * TRANSFER_DOUBLECHECKING: Transfer target hangs up or transferer presses DTMF
     * abort sequence.
     * TRANSFER_BLOND_NONFINAL: Recall target answers
     * TRANSFER_RECALLING: Recall target answers
     * TRANSFER_RETRANSFER: Recall target answers
     *
     * State operations:
     * None
     *
     * Transitions from TRANSFER_RESUME:
     * None
     */
    TRANSFER_RESUME,
    /*!
     * \brief Threeway state
     *
     * This state results when the transferer wishes to have all parties involved
     * in a transfer to be in the same bridge together.
     *
     * Superstate: Transfer
     *
     * Preconditions:
     * 1) Transfer target state is either RINGING or UP
     * 2) Transferer is in either bridge
     * 3) Transferee is not on hold
     *
     * Transitions to TRANSFER_THREEWAY:
     * 1) TRANSFER_CALLING_TARGET: Transferer presses DTMF threeway sequence.
     * 2) TRANSFER_HESITANT: Transferer presses DTMF threeway sequence.
     * 3) TRANSFER_CONSULTING: Transferer presses DTMF threeway sequence.
     * 4) TRANSFER_DOUBLECHECKING: Transferer presses DTMF threeway sequence.
     *
     * State operation:
     * The transfer target bridge is merged into the transferee bridge.
     *
     * Transitions from TRANSFER_THREEWAY:
     * None.
     */
    TRANSFER_THREEWAY,
    /*!
     * \brief Consulting state
     *
     * This state describes the case where the transferer and transfer target
     * are able to converse in the transfer target's bridge prior to completing
     * the transfer.
     *
     * Superstate: Transfer
     *
     * Preconditions:
     * 1) Transfer target is UP
     * 2) Transferer is in target bridge
     * 3) Transferee is on hold
     *
     * Transitions to TRANSFER_CONSULTING:
     * 1) TRANSFER_CALLING_TARGET: Transfer target answers.
     * 2) TRANSFER_DOUBLECHECKING: Transferer presses DTMF swap sequence.
     *
     * State operations:
     * None.
     *
     * Transitions from TRANSFER_CONSULTING:
     * TRANSFER_COMPLETE: Transferer hangs up or transferer presses DTMF complete sequence.
     * TRANSFER_REBRIDGE: Transfer target hangs up or transferer presses DTMF abort sequence.
     * TRANSFER_THREEWAY: Transferer presses DTMF threeway sequence.
     * TRANSFER_DOUBLECHECKING: Transferer presses DTMF swap sequence.
     */
    TRANSFER_CONSULTING,
    /*!
     * \brief Double-checking state
     *
     * This state describes the case where the transferer and transferee are
     * able to converse in the transferee's bridge prior to completing the transfer. The
     * difference between this and TRANSFER_HESITANT is that the transfer target is
     * UP in this case.
     *
     * Superstate: Transfer
     *
     * Preconditions:
     * 1) Transfer target is UP and on hold
     * 2) Transferer is in transferee bridge
     * 3) Transferee is off hold
     *
     * Transitions to TRANSFER_DOUBLECHECKING:
     * 1) TRANSFER_HESITANT: Transfer target answers.
     * 2) TRANSFER_CONSULTING: Transferer presses DTMF swap sequence.
     *
     * State operations:
     * None.
     *
     * Transitions from TRANSFER_DOUBLECHECKING:
     * 1) TRANSFER_FAIL: Transferee hangs up.
     * 2) TRANSFER_COMPLETE: Transferer hangs up or presses DTMF complete sequence.
     * 3) TRANSFER_RESUME: Transfer target hangs up or transferer presses DTMF abort sequence.
     * 4) TRANSFER_THREEWAY: Transferer presses DTMF threeway sequence.
     * 5) TRANSFER_CONSULTING: Transferer presses the DTMF swap sequence.
     */
    TRANSFER_DOUBLECHECKING,
    /*!
     * \brief Complete state
     *
     * This is a terminal state where a transferer has successfully completed an attended
     * transfer. This state's goal is to get the transfer target and transferee into
     * the same bridge and the transferer off the call.
     *
     * Superstate: Transfer
     *
     * Preconditions:
     * 1) Transfer target is UP and off hold.
     * 2) Transferer is in either bridge.
     * 3) Transferee is off hold.
     *
     * Transitions to TRANSFER_COMPLETE:
     * 1) TRANSFER_CONSULTING: transferer hangs up or presses the DTMF complete sequence.
     * 2) TRANSFER_DOUBLECHECKING: transferer hangs up or presses the DTMF complete sequence.
     *
     * State operation:
     * The transfer target bridge is merged into the transferee bridge. The transferer
     * channel is kicked out of the bridges as part of the merge.
     *
     * State operations:
     * 1) Merge the transfer target bridge into the transferee bridge,
     * excluding the transferer channel from the merge.
     * 2) Publish a stasis transfer message.
     *
     * Exit operations:
     * This is a terminal state, so there are no exit operations.
     */
    TRANSFER_COMPLETE,
    /*!
     * \brief Blond state
     *
     * This is a terminal state where a transferer has completed an attended transfer prior
     * to the transfer target answering. This state is only entered if atxferdropcall
     * is set to 'yes'. This is considered to be a successful attended transfer.
     *
     * Superstate: Transfer
     *
     * Preconditions:
     * 1) Transfer target is RINGING.
     * 2) Transferer is in either bridge.
     * 3) Transferee is off hold.
     *
     * Transitions to TRANSFER_BLOND:
     * 1) TRANSFER_CALLING_TARGET: Transferer hangs up or presses the DTMF complete sequence.
     *    atxferdropcall is set to 'yes'.
     * 2) TRANSFER_HESITANT: Transferer hangs up or presses the DTMF complete sequence.
     *    atxferdropcall is set to 'yes'.
     *
     * State operations:
     * The transfer target bridge is merged into the transferee bridge. The transferer
     * channel is kicked out of the bridges as part of the merge. A stasis transfer
     * publication is sent indicating a successful transfer.
     *
     * Transitions from TRANSFER_BLOND:
     * None
     */
    TRANSFER_BLOND,
    /*!
     * \brief Blond non-final state
     *
     * This state is very similar to the TRANSFER_BLOND state, except that
     * this state is entered when atxferdropcall is set to 'no'. This is the
     * initial state of the Recall superstate, so state operations mainly involve
     * moving to the Recall superstate. This means that the transfer target, that
     * is currently ringing is now known as the recall target.
     *
     * Superstate: Recall
     *
     * Preconditions:
     * 1) Recall target is RINGING.
     * 2) Transferee is off hold.
     *
     * Transitions to TRANSFER_BLOND_NONFINAL:
     * 1) TRANSFER_CALLING_TARGET: Transferer hangs up or presses the DTMF complete sequence.
     *    atxferdropcall is set to 'no'.
     * 2) TRANSFER_HESITANT: Transferer hangs up or presses the DTMF complete sequence.
     *    atxferdropcall is set to 'no'.
     *
     * State operation:
     * The superstate of the attended transfer is changed from Transfer to Recall.
     * The transfer target bridge is merged into the transferee bridge. The transferer
     * channel is kicked out of the bridges as part of the merge.
     *
     * Transitions from TRANSFER_BLOND_NONFINAL:
     * 1) TRANSFER_FAIL: Transferee hangs up
     * 2) TRANSFER_RESUME: Recall target answers
     * 3) TRANSFER_RECALLING: Recall target hangs up or time expires.
     */
    TRANSFER_BLOND_NONFINAL,
    /*!
     * \brief Recalling state
     *
     * This state is entered if the recall target from the TRANSFER_BLOND_NONFINAL
     * or TRANSFER_RETRANSFER states hangs up or does not answer. The goal of this
     * state is to call back the original transferer in an attempt to recover the
     * original call.
     *
     * Superstate: Recall
     *
     * Preconditions:
     * 1) Recall target is down.
     * 2) Transferee is off hold.
     *
     * Transitions to TRANSFER_RECALLING:
     * 1) TRANSFER_BLOND_NONFINAL: Recall target hangs up or time expires.
     * 2) TRANSFER_RETRANSFER: Recall target hangs up or time expires.
     *    atxferloopdelay is non-zero.
     * 3) TRANSFER_WAIT_TO_RECALL: Time expires.
     *
     * State operation:
     * The original transferer becomes the recall target and is called using the Dialing API.
     * Ringing is indicated to the transferee.
     *
     * Transitions from TRANSFER_RECALLING:
     * 1) TRANSFER_FAIL:
     *    a) Transferee hangs up.
     *    b) Recall target hangs up or time expires, and number of recall attempts exceeds atxfercallbackretries
     * 2) TRANSFER_WAIT_TO_RETRANSFER: Recall target hangs up or time expires.
     *    atxferloopdelay is non-zero.
     * 3) TRANSFER_RETRANSFER: Recall target hangs up or time expires.
     *    atxferloopdelay is zero.
     * 4) TRANSFER_RESUME: Recall target answers.
     */
    TRANSFER_RECALLING,
    /*!
     * \brief Wait to Retransfer state
     *
     * This state is used simply to give a bit of breathing room between attempting
     * to call back the original transferer and attempting to call back the original
     * transfer target. The transferee hears music on hold during this state as an
     * auditory clue that no one is currently being dialed.
     *
     * Superstate: Recall
     *
     * Preconditions:
     * 1) Recall target is down.
     * 2) Transferee is off hold.
     *
     * Transitions to TRANSFER_WAIT_TO_RETRANSFER:
     * 1) TRANSFER_RECALLING: Recall target hangs up or time expires.
     *    atxferloopdelay is non-zero.
     *
     * State operation:
     * The transferee is placed on hold.
     *
     * Transitions from TRANSFER_WAIT_TO_RETRANSFER:
     * 1) TRANSFER_FAIL: Transferee hangs up.
     * 2) TRANSFER_RETRANSFER: Time expires.
     */
    TRANSFER_WAIT_TO_RETRANSFER,
    /*!
     * \brief Retransfer state
     *
     * This state is used in order to attempt to call back the original
     * transfer target channel from the transfer. The transferee hears
     * ringing during this state as an auditory cue that a party is being
     * dialed.
     *
     * Superstate: Recall
     *
     * Preconditions:
     * 1) Recall target is down.
     * 2) Transferee is off hold.
     *
     * Transitions to TRANSFER_RETRANSFER:
     * 1) TRANSFER_RECALLING: Recall target hangs up or time expires.
     *    atxferloopdelay is zero.
     * 2) TRANSFER_WAIT_TO_RETRANSFER: Time expires.
     *
     * State operation:
     * The original transfer target is requested and is set as the recall target.
     * The recall target is called and placed into the transferee bridge.
     *
     * Transitions from TRANSFER_RETRANSFER:
     * 1) TRANSFER_FAIL: Transferee hangs up.
     * 2) TRANSFER_WAIT_TO_RECALL: Recall target hangs up or time expires.
     *    atxferloopdelay is non-zero.
     * 3) TRANSFER_RECALLING: Recall target hangs up or time expires.
     *    atxferloopdelay is zero.
     */
    TRANSFER_RETRANSFER,
    /*!
     * \brief Wait to recall state
     *
     * This state is used simply to give a bit of breathing room between attempting
     * to call back the original transfer target and attempting to call back the
     * original transferer. The transferee hears music on hold during this state as an
     * auditory clue that no one is currently being dialed.
     *
     * Superstate: Recall
     *
     * Preconditions:
     * 1) Recall target is down.
     * 2) Transferee is off hold.
     *
     * Transitions to TRANSFER_WAIT_TO_RECALL:
     * 1) TRANSFER_RETRANSFER: Recall target hangs up or time expires.
     *    atxferloopdelay is non-zero.
     *
     * State operation:
     * Transferee is placed on hold.
     *
     * Transitions from TRANSFER_WAIT_TO_RECALL:
     * 1) TRANSFER_FAIL: Transferee hangs up
     * 2) TRANSFER_RECALLING: Time expires
     */
    TRANSFER_WAIT_TO_RECALL,
    /*!
     * \brief Fail state
     *
     * This state indicates that something occurred during the transfer that
     * makes a graceful completion impossible. The most common stimulus for this
     * state is when the transferee hangs up.
     *
     * Superstate: Transfer and Recall
     *
     * Preconditions:
     * None
     *
     * Transitions to TRANSFER_FAIL:
     * 1) TRANSFER_CALLING_TARGET: Transferee hangs up.
     * 2) TRANSFER_HESITANT: Transferee hangs up.
     * 3) TRANSFER_DOUBLECHECKING: Transferee hangs up.
     * 4) TRANSFER_BLOND_NONFINAL: Transferee hangs up.
     * 5) TRANSFER_RECALLING:
     *    a) Transferee hangs up.
     *    b) Recall target hangs up or time expires, and number of
     *       recall attempts exceeds atxfercallbackretries.
     * 6) TRANSFER_WAIT_TO_RETRANSFER: Transferee hangs up.
     * 7) TRANSFER_RETRANSFER: Transferee hangs up.
     * 8) TRANSFER_WAIT_TO_RECALL: Transferee hangs up.
     *
     * State operation:
     * A transfer stasis publication is made indicating a failed transfer.
     * The transferee bridge is destroyed.
     *
     * Transitions from TRANSFER_FAIL:
     * None.
     */
    TRANSFER_FAIL,
};

attended_transfer_state_flags

enum attended_transfer_state_flags

Flags that indicate properties of attended transfer states.

Enumerator
TRANSFER_STATE_FLAG_TIMER_RESET	This state requires that the timer be reset when entering the state
TRANSFER_STATE_FLAG_TIMER_LOOP_DELAY	This state's timer uses atxferloopdelay
TRANSFER_STATE_FLAG_ATXFER_NO_ANSWER	This state's timer uses atxfernoanswertimeout
TRANSFER_STATE_FLAG_TIMED	This state has a time limit associated with it
TRANSFER_STATE_FLAG_TERMINAL	This state does not transition to any other states

Definition at line 1949 of file bridge_basic.c.

                                   {
    /*! This state requires that the timer be reset when entering the state */
    TRANSFER_STATE_FLAG_TIMER_RESET = (1 << 0),
    /*! This state's timer uses atxferloopdelay */
    TRANSFER_STATE_FLAG_TIMER_LOOP_DELAY = (1 << 1),
    /*! This state's timer uses atxfernoanswertimeout */
    TRANSFER_STATE_FLAG_ATXFER_NO_ANSWER = (1 << 2),
    /*! This state has a time limit associated with it */
    TRANSFER_STATE_FLAG_TIMED = (TRANSFER_STATE_FLAG_TIMER_RESET |
            TRANSFER_STATE_FLAG_TIMER_LOOP_DELAY | TRANSFER_STATE_FLAG_ATXFER_NO_ANSWER),
    /*! This state does not transition to any other states */
    TRANSFER_STATE_FLAG_TERMINAL = (1 << 3),
};

attended_transfer_stimulus

enum attended_transfer_stimulus

Stimuli that can cause transfer state changes.

Enumerator
STIMULUS_NONE	No stimulus. This literally can never happen.
STIMULUS_TRANSFEREE_HANGUP	All of the transferee channels have been hung up.
STIMULUS_TRANSFERER_HANGUP	The transferer has hung up.
STIMULUS_TRANSFER_TARGET_HANGUP	The transfer target channel has hung up.
STIMULUS_TRANSFER_TARGET_ANSWER	The transfer target channel has answered.
STIMULUS_RECALL_TARGET_HANGUP	The recall target channel has hung up.
STIMULUS_RECALL_TARGET_ANSWER	The recall target channel has answered.
STIMULUS_TIMEOUT	The current state's timer has expired.
STIMULUS_DTMF_ATXFER_ABORT	The transferer pressed the abort DTMF sequence.
STIMULUS_DTMF_ATXFER_COMPLETE	The transferer pressed the complete DTMF sequence.
STIMULUS_DTMF_ATXFER_THREEWAY	The transferer pressed the three-way DTMF sequence.
STIMULUS_DTMF_ATXFER_SWAP	The transferer pressed the swap DTMF sequence.

Definition at line 1235 of file bridge_basic.c.

                                {
    /*! No stimulus. This literally can never happen. */
    STIMULUS_NONE,
    /*! All of the transferee channels have been hung up. */
    STIMULUS_TRANSFEREE_HANGUP,
    /*! The transferer has hung up. */
    STIMULUS_TRANSFERER_HANGUP,
    /*! The transfer target channel has hung up. */
    STIMULUS_TRANSFER_TARGET_HANGUP,
    /*! The transfer target channel has answered. */
    STIMULUS_TRANSFER_TARGET_ANSWER,
    /*! The recall target channel has hung up. */
    STIMULUS_RECALL_TARGET_HANGUP,
    /*! The recall target channel has answered. */
    STIMULUS_RECALL_TARGET_ANSWER,
    /*! The current state's timer has expired. */
    STIMULUS_TIMEOUT,
    /*! The transferer pressed the abort DTMF sequence. */
    STIMULUS_DTMF_ATXFER_ABORT,
    /*! The transferer pressed the complete DTMF sequence. */
    STIMULUS_DTMF_ATXFER_COMPLETE,
    /*! The transferer pressed the three-way DTMF sequence. */
    STIMULUS_DTMF_ATXFER_THREEWAY,
    /*! The transferer pressed the swap DTMF sequence. */
    STIMULUS_DTMF_ATXFER_SWAP,
};

attended_transfer_superstate

enum attended_transfer_superstate

Attended transfer superstates.

An attended transfer's progress is facilitated by a state machine. The individual states of the state machine fall into the realm of one of two superstates.

Enumerator
SUPERSTATE_TRANSFER	Transfer superstate. The attended transfer state machine begins in this superstate. The goal of this state is for a transferer channel to facilitate a transfer from a transferee to a transfer target. There are two bridges used in this superstate. The transferee bridge is the bridge that the transferer and transferee channels originally communicate in, and the target bridge is the bridge where the transfer target is being dialed. The transferer channel is capable of moving between the bridges using the DTMF swap sequence.
SUPERSTATE_RECALL	Recall superstate. The attended transfer state machine moves to this superstate if atxferdropcall is set to "no" and the transferer channel hangs up during a transfer. The goal in this superstate is to call back either the transfer target or transferer and rebridge with the transferee channel(s). In this superstate, there is only a single bridge used, the original transferee bridge. Rather than distinguishing between a transferer and transfer target, all outbound calls are toward a "recall_target" channel.

Definition at line 736 of file bridge_basic.c.

                                  {
    /*!
     * \brief Transfer superstate
     *
     * The attended transfer state machine begins in this superstate. The
     * goal of this state is for a transferer channel to facilitate a
     * transfer from a transferee to a transfer target.
     *
     * There are two bridges used in this superstate. The transferee bridge is
     * the bridge that the transferer and transferee channels originally
     * communicate in, and the target bridge is the bridge where the transfer
     * target is being dialed.
     *
     * The transferer channel is capable of moving between the bridges using
     * the DTMF swap sequence.
     */
    SUPERSTATE_TRANSFER,
    /*!
     * \brief Recall superstate
     *
     * The attended transfer state machine moves to this superstate if
     * atxferdropcall is set to "no" and the transferer channel hangs up
     * during a transfer. The goal in this superstate is to call back either
     * the transfer target or transferer and rebridge with the transferee
     * channel(s).
     *
     * In this superstate, there is only a single bridge used, the original
     * transferee bridge. Rather than distinguishing between a transferer
     * and transfer target, all outbound calls are toward a "recall_target"
     * channel.
     */
    SUPERSTATE_RECALL,
};

bridge_basic_personality_type

enum bridge_basic_personality_type

Enumerator
BRIDGE_BASIC_PERSONALITY_NORMAL	Index for "normal" basic bridge personality
BRIDGE_BASIC_PERSONALITY_ATXFER	Index for attended transfer basic bridge personality
BRIDGE_BASIC_PERSONALITY_END	Indicates end of enum. Must always remain the last element

Definition at line 58 of file bridge_basic.c.

                                   {
    /*! Index for "normal" basic bridge personality */
    BRIDGE_BASIC_PERSONALITY_NORMAL,
    /*! Index for attended transfer basic bridge personality */
    BRIDGE_BASIC_PERSONALITY_ATXFER,
    /*! Indicates end of enum. Must always remain the last element */
    BRIDGE_BASIC_PERSONALITY_END,
};

Function Documentation

add_normal_hooks()

static int add_normal_hooks ( struct ast_bridge *  bridge, struct ast_bridge_channel *  bridge_channel  )

static

Definition at line 640 of file bridge_basic.c.

{
    return ast_bridge_hangup_hook(bridge_channel->features, basic_hangup_hook,
            NULL, NULL, AST_BRIDGE_HOOK_REMOVE_ON_PULL)
        || bridge_basic_setup_features(bridge_channel);
}

References ast_bridge_hangup_hook(), AST_BRIDGE_HOOK_REMOVE_ON_PULL, basic_hangup_hook(), bridge_basic_setup_features(), ast_bridge_channel::features, and NULL.

Referenced by bridge_personality_normal_push(), and on_personality_change_normal().

add_transferer_role()

static int add_transferer_role ( struct ast_channel *  chan, struct ast_bridge_features_attended_transfer *  attended_transfer  )

static

Definition at line 3135 of file bridge_basic.c.

{
    const char *atxfer_abort;
    const char *atxfer_threeway;
    const char *atxfer_complete;
    const char *atxfer_swap;
    struct ast_features_xfer_config *xfer_cfg;
    SCOPED_CHANNELLOCK(lock, chan);
 
    xfer_cfg = ast_get_chan_features_xfer_config(chan);
    if (!xfer_cfg) {
        return -1;
    }
    if (attended_transfer) {
        atxfer_abort = ast_strdupa(S_OR(attended_transfer->abort, xfer_cfg->atxferabort));
        atxfer_threeway = ast_strdupa(S_OR(attended_transfer->threeway, xfer_cfg->atxferthreeway));
        atxfer_complete = ast_strdupa(S_OR(attended_transfer->complete, xfer_cfg->atxfercomplete));
        atxfer_swap = ast_strdupa(S_OR(attended_transfer->swap, xfer_cfg->atxferswap));
    } else {
        atxfer_abort = ast_strdupa(xfer_cfg->atxferabort);
        atxfer_threeway = ast_strdupa(xfer_cfg->atxferthreeway);
        atxfer_complete = ast_strdupa(xfer_cfg->atxfercomplete);
        atxfer_swap = ast_strdupa(xfer_cfg->atxferswap);
    }
    ao2_ref(xfer_cfg, -1);
 
    return ast_channel_add_bridge_role(chan, AST_TRANSFERER_ROLE_NAME) ||
        ast_channel_set_bridge_role_option(chan, AST_TRANSFERER_ROLE_NAME, "abort", atxfer_abort) ||
        ast_channel_set_bridge_role_option(chan, AST_TRANSFERER_ROLE_NAME, "complete", atxfer_complete) ||
        ast_channel_set_bridge_role_option(chan, AST_TRANSFERER_ROLE_NAME, "threeway", atxfer_threeway) ||
        ast_channel_set_bridge_role_option(chan, AST_TRANSFERER_ROLE_NAME, "swap", atxfer_swap);
}

References ast_bridge_features_attended_transfer::abort, ao2_ref, ast_channel_add_bridge_role(), ast_channel_set_bridge_role_option(), ast_get_chan_features_xfer_config(), ast_strdupa, AST_TRANSFERER_ROLE_NAME, atxfer_abort(), atxfer_complete(), atxfer_swap(), atxfer_threeway(), ast_features_xfer_config::atxferabort, ast_features_xfer_config::atxfercomplete, ast_features_xfer_config::atxferswap, ast_features_xfer_config::atxferthreeway, ast_bridge_features_attended_transfer::complete, lock, S_OR, SCOPED_CHANNELLOCK, ast_bridge_features_attended_transfer::swap, and ast_bridge_features_attended_transfer::threeway.

Referenced by feature_attended_transfer().

ast_bridge_basic_new()

struct ast_bridge * ast_bridge_basic_new

(

void

)

Create a new basic class bridge.

Returns

a pointer to a new bridge on success

Return values

NULL	on failure

Example usage:

struct ast_bridge *bridge;
bridge = ast_bridge_basic_new();

This creates a basic two party bridge with any configured DTMF features enabled that will be destroyed once one of the channels hangs up.

Definition at line 3655 of file bridge_basic.c.

{
    struct ast_bridge *bridge;
 
    bridge = bridge_alloc(sizeof(struct ast_bridge), &ast_bridge_basic_v_table);
    bridge = bridge_base_init(bridge,
        AST_BRIDGE_CAPABILITY_NATIVE | AST_BRIDGE_CAPABILITY_1TO1MIX
            | AST_BRIDGE_CAPABILITY_MULTIMIX, NORMAL_FLAGS, NULL, NULL, NULL);
    bridge = bridge_basic_personality_alloc(bridge);
    bridge = bridge_register(bridge);
    return bridge;
}

References ast_bridge_basic_v_table, AST_BRIDGE_CAPABILITY_1TO1MIX, AST_BRIDGE_CAPABILITY_MULTIMIX, AST_BRIDGE_CAPABILITY_NATIVE, bridge_alloc(), bridge_base_init(), bridge_basic_personality_alloc(), bridge_register(), NORMAL_FLAGS, and NULL.

Referenced by action_bridge(), agent_request_exec(), ast_bridge_call_with_flags(), AST_TEST_DEFINE(), bridge_exec(), feature_attended_transfer(), and parked_call_app_exec().

ast_bridge_basic_set_flags()

void ast_bridge_basic_set_flags	(	struct ast_bridge *	bridge,
		unsigned int	flags
	)

Set feature flags on a basic bridge.

Using this function instead of setting flags directly will ensure that after operations such as an attended transfer, the bridge will maintain the flags that were set on it.

Parameters

bridge
flags	These are added to the flags already set.

Definition at line 3668 of file bridge_basic.c.

{
    SCOPED_LOCK(lock, bridge, ast_bridge_lock, ast_bridge_unlock);
    struct bridge_basic_personality *personality = bridge->personality;
 
    personality->details[personality->current].bridge_flags |= flags;
    ast_set_flag(&bridge->feature_flags, flags);
}

References ast_bridge_lock, ast_bridge_unlock, ast_set_flag, personality_details::bridge_flags, bridge_basic_personality::current, bridge_basic_personality::details, ast_bridge::feature_flags, lock, ast_bridge::personality, and SCOPED_LOCK.

Referenced by ast_bridge_call_with_flags().

ast_bridge_features_ds_append()

int ast_bridge_features_ds_append	(	struct ast_channel *	chan,
		struct ast_flags *	flags
	)

Append basic bridge DTMF feature flags on the channel.

Since

12.0.0

Parameters

chan	Channel to append DTMF features datastore.
flags	Builtin DTMF feature flags. (ast_bridge_config flags)

Note

The channel must be locked before calling this function.

This function differs from ast_bridge_features_ds_set only in that it won't remove features already set on the channel.

Return values

0	on success.
-1	on error.

Definition at line 263 of file bridge_basic.c.

{
    return bridge_features_ds_set_full(chan, flags, 0);
}

References bridge_features_ds_set_full(), and ast_flags::flags.

Referenced by pre_bridge_setup().

ast_bridge_features_ds_get()

struct ast_flags * ast_bridge_features_ds_get

(

struct ast_channel *

chan

)

Get DTMF feature flags from the channel.

Since

12.0.0

Parameters

chan	Channel to get DTMF features datastore.

Note

The channel should be locked before calling this function.

The channel must remain locked until the flags returned have been consumed.

Returns

flags on success.

Return values

NULL	if the datastore does not exist.

Definition at line 268 of file bridge_basic.c.

{
    struct ast_datastore *datastore;
 
    datastore = ast_channel_datastore_find(chan, &dtmf_features_info, NULL);
    if (!datastore) {
        return NULL;
    }
    return datastore->data;
}

References ast_channel_datastore_find(), ast_datastore::data, dtmf_features_info, and NULL.

Referenced by ast_bridge_features_ds_get_string(), attended_transfer_properties_alloc(), parked_call_retrieve_enable_features(), and setup_bridge_features_builtin().

ast_bridge_features_ds_get_string()

int ast_bridge_features_ds_get_string	(	struct ast_channel *	chan,
		char *	buffer,
		size_t	buf_size
	)

writes a channel's DTMF features to a buffer string

Since

12.0.0

Parameters

chan	channel whose feature flags should be checked
buffer	pointer string buffer where the output should be stored
buf_size	size of the provided buffer (ideally enough for all features, 6+)

Return values

0	on successful write
-1	on failure

Definition at line 208 of file bridge_basic.c.

{
    struct ast_flags *channel_flags;
    struct ast_flags held_copy;
 
    ast_channel_lock(chan);
    if (!(channel_flags = ast_bridge_features_ds_get(chan))) {
        ast_channel_unlock(chan);
        return -1;
    }
    held_copy = *channel_flags;
    ast_channel_unlock(chan);
 
    return dtmf_features_flags_to_string(&held_copy, buffer, buf_size);
}

References ast_bridge_features_ds_get(), ast_channel_lock, ast_channel_unlock, and dtmf_features_flags_to_string().

Referenced by func_channel_read().

ast_bridge_features_ds_set()

int ast_bridge_features_ds_set	(	struct ast_channel *	chan,
		struct ast_flags *	flags
	)

Set basic bridge DTMF feature flags datastore on the channel.

Since

12.0.0

Parameters

chan	Channel to set DTMF features datastore.
flags	Builtin DTMF feature flags. (ast_bridge_config flags)

Note

The channel must be locked before calling this function.

Return values

0	on success.
-1	on error.

Definition at line 258 of file bridge_basic.c.

{
    return bridge_features_ds_set_full(chan, flags, 1);
}

References bridge_features_ds_set_full(), and ast_flags::flags.

Referenced by ast_bridge_features_ds_set_string(), parked_call_retrieve_enable_features(), and recalling_exit().

ast_bridge_features_ds_set_string()

int ast_bridge_features_ds_set_string	(	struct ast_channel *	chan,
		const char *	features
	)

Sets the features a channel will use upon being bridged.

Since

12.0.0

Parameters

chan	Which channel to set features for
features	Which feature codes to set for the channel

Return values

0	on success
-1	on failure

Definition at line 189 of file bridge_basic.c.

{
    struct ast_flags flags = {0};
 
    if (build_dtmf_features(&flags, features)) {
        return -1;
    }
 
    ast_channel_lock(chan);
    if (ast_bridge_features_ds_set(chan, &flags)) {
        ast_channel_unlock(chan);
        ast_log(LOG_ERROR, "Failed to apply features datastore for '%s' to channel '%s'\n", features, ast_channel_name(chan));
        return -1;
    }
    ast_channel_unlock(chan);
 
    return 0;
}

References ast_bridge_features_ds_set(), ast_channel_lock, ast_channel_name(), ast_channel_unlock, ast_log, build_dtmf_features(), ast_flags::flags, and LOG_ERROR.

Referenced by func_channel_write_real().

ast_bridging_init_basic()

void ast_bridging_init_basic

(

void

)

Initialize the basic bridge class for use by the system.

Definition at line 3677 of file bridge_basic.c.

{
    /* Setup bridge basic subclass v_table. */
    ast_bridge_basic_v_table = ast_bridge_base_v_table;
    ast_bridge_basic_v_table.name = "basic";
    ast_bridge_basic_v_table.push = bridge_basic_push;
    ast_bridge_basic_v_table.pull = bridge_basic_pull;
    ast_bridge_basic_v_table.destroy = bridge_basic_destroy;
 
    /*
     * Personality vtables don't have the same rules as
     * normal bridge vtables.  These vtable functions are
     * used as alterations to the ast_bridge_basic_v_table
     * method functionality and are checked for NULL before
     * calling.
     */
    personality_normal_v_table.name = "normal";
    personality_normal_v_table.push = bridge_personality_normal_push;
 
    personality_atxfer_v_table.name = "attended transfer";
    personality_atxfer_v_table.push = bridge_personality_atxfer_push;
    personality_atxfer_v_table.pull = bridge_personality_atxfer_pull;
 
    ast_bridge_features_register(AST_BRIDGE_BUILTIN_ATTENDEDTRANSFER, feature_attended_transfer, NULL);
    ast_bridge_features_register(AST_BRIDGE_BUILTIN_BLINDTRANSFER, feature_blind_transfer, NULL);
}

References ast_bridge_base_v_table, ast_bridge_basic_v_table, AST_BRIDGE_BUILTIN_ATTENDEDTRANSFER, AST_BRIDGE_BUILTIN_BLINDTRANSFER, ast_bridge_features_register(), bridge_basic_destroy(), bridge_basic_pull(), bridge_basic_push(), bridge_personality_atxfer_pull(), bridge_personality_atxfer_push(), bridge_personality_normal_push(), ast_bridge_methods::destroy, feature_attended_transfer(), feature_blind_transfer(), ast_bridge_methods::name, NULL, personality_atxfer_v_table, personality_normal_v_table, ast_bridge_methods::pull, and ast_bridge_methods::push.

Referenced by ast_bridging_init().

attach_framehook()

static int attach_framehook ( struct attended_transfer_properties *  props, struct ast_channel *  channel  )

static

Definition at line 3112 of file bridge_basic.c.

{
    struct ast_framehook_interface target_interface = {
        .version = AST_FRAMEHOOK_INTERFACE_VERSION,
        .event_cb = transfer_target_framehook_cb,
        .destroy_cb = transfer_target_framehook_destroy_cb,
        .consume_cb = transfer_target_framehook_consume,
        .disable_inheritance = 1,
    };
 
    ao2_ref(props, +1);
    target_interface.data = props;
 
    ast_channel_lock(channel);
    props->target_framehook_id = ast_framehook_attach(channel, &target_interface);
    ast_channel_unlock(channel);
    if (props->target_framehook_id == -1) {
        ao2_ref(props, -1);
        return -1;
    }
    return 0;
}

References ao2_ref, ast_channel_lock, ast_channel_unlock, ast_framehook_attach(), AST_FRAMEHOOK_INTERFACE_VERSION, ast_framehook_interface::data, attended_transfer_properties::target_framehook_id, transfer_target_framehook_cb(), transfer_target_framehook_consume(), transfer_target_framehook_destroy_cb(), and ast_framehook_interface::version.

Referenced by feature_attended_transfer(), and retransfer_enter().

attended_transfer_monitor_thread()

static void * attended_transfer_monitor_thread ( void *  data )

static

The main loop for the attended transfer monitor thread.

This loop runs continuously until the attended transfer reaches a terminal state. Stimuli for changes in the attended transfer state are handled in this thread so that all factors in an attended transfer can be handled in an orderly fashion.

Parameters

data	The attended transfer properties

Definition at line 3058 of file bridge_basic.c.

{
    struct attended_transfer_properties *props = data;
    ast_callid callid;
 
    /*
     * Set thread callid to the transferer's callid because we
     * are doing all this on that channel's behalf.
     */
    ast_channel_lock(props->transferer);
    callid = ast_channel_callid(props->transferer);
    ast_channel_unlock(props->transferer);
    if (callid) {
        ast_callid_threadassoc_add(callid);
    }
 
    for (;;) {
        enum attended_transfer_stimulus stimulus;
 
        ast_debug(1, "About to enter state %s for attended transfer %p\n", state_properties[props->state].state_name, props);
 
        if (state_properties[props->state].enter &&
                state_properties[props->state].enter(props)) {
            ast_log(LOG_ERROR, "State %s enter function returned an error for attended transfer %p\n",
                    state_properties[props->state].state_name, props);
            break;
        }
 
        if (state_properties[props->state].flags & TRANSFER_STATE_FLAG_TERMINAL) {
            ast_debug(1, "State %s is a terminal state. Ending attended transfer %p\n",
                    state_properties[props->state].state_name, props);
            break;
        }
 
        stimulus = wait_for_stimulus(props);
 
        ast_debug(1, "Received stimulus %s on attended transfer %p\n", stimulus_strs[stimulus], props);
 
        ast_assert(state_properties[props->state].exit != NULL);
 
        props->state = state_properties[props->state].exit(props, stimulus);
 
        ast_debug(1, "Told to enter state %s exit on attended transfer %p\n", state_properties[props->state].state_name, props);
    }
 
    attended_transfer_properties_shutdown(props);
 
    if (callid) {
        ast_callid_threadassoc_remove();
    }
 
    return NULL;
}

References ast_assert, ast_callid_threadassoc_add(), ast_callid_threadassoc_remove(), ast_channel_callid(), ast_channel_lock, ast_channel_unlock, ast_debug, ast_log, attended_transfer_properties_shutdown(), attended_transfer_state_properties::enter, attended_transfer_state_properties::exit, attended_transfer_state_properties::flags, LOG_ERROR, NULL, attended_transfer_properties::state, attended_transfer_state_properties::state_name, state_properties, stimulus_strs, TRANSFER_STATE_FLAG_TERMINAL, attended_transfer_properties::transferer, and wait_for_stimulus().

Referenced by feature_attended_transfer().

attended_transfer_properties_alloc()

static struct attended_transfer_properties * attended_transfer_properties_alloc ( struct ast_channel *  transferer, const char *  context  )

static

Allocate and initialize attended transfer properties.

Parameters

transferer	The channel performing the attended transfer
context	Suggestion for what context the transfer target extension can be found in

Return values

NULL	Failure to allocate or initialize
non-NULL	Newly allocated properties

Definition at line 1425 of file bridge_basic.c.

{
    struct attended_transfer_properties *props;
    char *tech;
    char *addr;
    char *serial;
    struct ast_features_xfer_config *xfer_cfg;
    struct ast_flags *transferer_features;
 
    props = ao2_alloc(sizeof(*props), attended_transfer_properties_destructor);
    if (!props) {
        ast_log(LOG_ERROR, "Unable to create props - channel %s, context %s\n",
            ast_channel_name(transferer), context);
        return NULL;
    }
 
    ast_cond_init(&props->cond, NULL);
 
    if (ast_string_field_init(props, 64)) {
        ast_log(LOG_ERROR, "Unable to initialize prop fields - channel %s, context %s\n",
            ast_channel_name(transferer), context);
        ao2_ref(props, -1);
        return NULL;
    }
 
    props->target_framehook_id = -1;
    props->transferer = ast_channel_ref(transferer);
 
    ast_channel_lock(props->transferer);
    xfer_cfg = ast_get_chan_features_xfer_config(props->transferer);
    if (!xfer_cfg) {
        ast_log(LOG_ERROR, "Unable to get transfer configuration from channel %s\n", ast_channel_name(props->transferer));
        ast_channel_unlock(props->transferer);
        ao2_ref(props, -1);
        return NULL;
    }
    transferer_features = ast_bridge_features_ds_get(props->transferer);
    if (transferer_features) {
        props->transferer_features = *transferer_features;
    }
    props->atxferdropcall = xfer_cfg->atxferdropcall;
    props->atxfercallbackretries = xfer_cfg->atxfercallbackretries;
    props->atxfernoanswertimeout = xfer_cfg->atxfernoanswertimeout;
    props->atxferloopdelay = xfer_cfg->atxferloopdelay;
    ast_string_field_set(props, context, get_transfer_context(transferer, context));
    ast_string_field_set(props, xfersound, xfer_cfg->xfersound);
    ao2_ref(xfer_cfg, -1);
 
    /*
     * Save the transferee's party information for any recall calls.
     * This is the only piece of information needed that gets overwritten
     * on the transferer channel by the inital call to the transfer target.
     */
    ast_party_connected_line_copy(&props->original_transferer_colp,
        ast_channel_connected(props->transferer));
 
    tech = ast_strdupa(ast_channel_name(props->transferer));
    addr = strchr(tech, '/');
    if (!addr) {
        ast_log(LOG_ERROR, "Transferer channel name does not follow typical channel naming format (tech/address)\n");
        ast_channel_unlock(props->transferer);
        ao2_ref(props, -1);
        return NULL;
    }
    *addr++ = '\0';
    serial = strrchr(addr, '-');
    if (serial) {
        *serial = '\0';
    }
    ast_string_field_set(props, transferer_type, tech);
    ast_string_field_set(props, transferer_addr, addr);
 
    ast_channel_unlock(props->transferer);
 
    ast_debug(1, "Allocated attended transfer properties %p for transfer from %s\n",
            props, ast_channel_name(props->transferer));
    return props;
}

References ao2_alloc, ao2_ref, ast_bridge_features_ds_get(), ast_channel_connected(), ast_channel_lock, ast_channel_name(), ast_channel_ref, ast_channel_unlock, ast_cond_init, ast_debug, ast_get_chan_features_xfer_config(), ast_log, ast_party_connected_line_copy(), ast_strdupa, ast_string_field_init, ast_string_field_set, attended_transfer_properties_destructor(), ast_features_xfer_config::atxfercallbackretries, attended_transfer_properties::atxfercallbackretries, ast_features_xfer_config::atxferdropcall, attended_transfer_properties::atxferdropcall, ast_features_xfer_config::atxferloopdelay, attended_transfer_properties::atxferloopdelay, ast_features_xfer_config::atxfernoanswertimeout, attended_transfer_properties::atxfernoanswertimeout, attended_transfer_properties::cond, voicemailpwcheck::context, get_transfer_context(), LOG_ERROR, NULL, attended_transfer_properties::original_transferer_colp, attended_transfer_properties::target_framehook_id, attended_transfer_properties::transferer, attended_transfer_properties::transferer_features, and ast_features_xfer_config::xfersound.

Referenced by feature_attended_transfer().

attended_transfer_properties_destructor()

static void attended_transfer_properties_destructor ( void *  obj )

static

Definition at line 1352 of file bridge_basic.c.

{
    struct attended_transfer_properties *props = obj;
 
    ast_debug(1, "Destroy attended transfer properties %p\n", props);
 
    ao2_cleanup(props->target_bridge);
    ao2_cleanup(props->transferee_bridge);
    /* Use ast_channel_cleanup() instead of ast_channel_unref() for channels since they may be NULL */
    ast_channel_cleanup(props->transferer);
    ast_channel_cleanup(props->transfer_target);
    ast_channel_cleanup(props->recall_target);
    ast_party_connected_line_free(&props->original_transferer_colp);
    ast_string_field_free_memory(props);
    ast_cond_destroy(&props->cond);
}

References ao2_cleanup, ast_channel_cleanup, ast_cond_destroy, ast_debug, ast_party_connected_line_free(), ast_string_field_free_memory, attended_transfer_properties::cond, attended_transfer_properties::original_transferer_colp, attended_transfer_properties::recall_target, attended_transfer_properties::target_bridge, attended_transfer_properties::transfer_target, attended_transfer_properties::transferee_bridge, and attended_transfer_properties::transferer.

Referenced by attended_transfer_properties_alloc().

attended_transfer_properties_shutdown()

static void attended_transfer_properties_shutdown ( struct attended_transfer_properties *  props )

static

Initiate shutdown of attended transfer properties.

Calling this indicates that the attended transfer properties are no longer needed because the transfer operation has concluded.

Definition at line 1524 of file bridge_basic.c.

{
    ast_debug(1, "Shutting down attended transfer %p\n", props);
 
    if (props->transferee_bridge) {
        bridge_basic_change_personality(props->transferee_bridge,
                BRIDGE_BASIC_PERSONALITY_NORMAL, NULL);
        ast_bridge_merge_inhibit(props->transferee_bridge, -1);
    }
 
    if (props->target_bridge) {
        ast_bridge_destroy(props->target_bridge, 0);
        props->target_bridge = NULL;
    }
 
    if (props->transferer) {
        ast_channel_remove_bridge_role(props->transferer, AST_TRANSFERER_ROLE_NAME);
    }
 
    clear_stimulus_queue(props);
 
    ao2_cleanup(props);
}

References ao2_cleanup, ast_bridge_destroy(), ast_bridge_merge_inhibit(), ast_channel_remove_bridge_role(), ast_debug, AST_TRANSFERER_ROLE_NAME, bridge_basic_change_personality(), BRIDGE_BASIC_PERSONALITY_NORMAL, clear_stimulus_queue(), NULL, attended_transfer_properties::target_bridge, attended_transfer_properties::transferee_bridge, and attended_transfer_properties::transferer.

Referenced by attended_transfer_monitor_thread(), and feature_attended_transfer().

atxfer_abort()

static int atxfer_abort ( struct ast_bridge_channel *  bridge_channel, void *  hook_pvt  )

static

DTMF hook when transferer presses abort sequence.

Sends a stimulus to the attended transfer monitor thread that the abort sequence has been pressed

Definition at line 2755 of file bridge_basic.c.

{
    struct attended_transfer_properties *props = hook_pvt;
 
    ast_debug(1, "Transferer on attended transfer %p pressed abort sequence\n", props);
    stimulate_attended_transfer(props, STIMULUS_DTMF_ATXFER_ABORT);
    return 0;
}

References ast_debug, stimulate_attended_transfer(), and STIMULUS_DTMF_ATXFER_ABORT.

Referenced by add_transferer_role(), and bridge_personality_atxfer_push().

atxfer_complete()

static int atxfer_complete ( struct ast_bridge_channel *  bridge_channel, void *  hook_pvt  )

static

DTMF hook when transferer presses complete sequence.

Sends a stimulus to the attended transfer monitor thread that the complete sequence has been pressed

Definition at line 2769 of file bridge_basic.c.

{
    struct attended_transfer_properties *props = hook_pvt;
 
    ast_debug(1, "Transferer on attended transfer %p pressed complete sequence\n", props);
    stimulate_attended_transfer(props, STIMULUS_DTMF_ATXFER_COMPLETE);
    return 0;
}

References ast_debug, stimulate_attended_transfer(), and STIMULUS_DTMF_ATXFER_COMPLETE.

Referenced by add_transferer_role(), and bridge_personality_atxfer_push().

atxfer_swap()

static int atxfer_swap ( struct ast_bridge_channel *  bridge_channel, void *  hook_pvt  )

static

DTMF hook when transferer presses swap sequence.

Sends a stimulus to the attended transfer monitor thread that the swap sequence has been pressed

Definition at line 2797 of file bridge_basic.c.

{
    struct attended_transfer_properties *props = hook_pvt;
 
    ast_debug(1, "Transferer on attended transfer %p pressed swap sequence\n", props);
    stimulate_attended_transfer(props, STIMULUS_DTMF_ATXFER_SWAP);
    return 0;
}

References ast_debug, stimulate_attended_transfer(), and STIMULUS_DTMF_ATXFER_SWAP.

Referenced by add_transferer_role(), and bridge_personality_atxfer_push().

atxfer_threeway()

static int atxfer_threeway ( struct ast_bridge_channel *  bridge_channel, void *  hook_pvt  )

static

DTMF hook when transferer presses threeway sequence.

Sends a stimulus to the attended transfer monitor thread that the threeway sequence has been pressed

Definition at line 2783 of file bridge_basic.c.

{
    struct attended_transfer_properties *props = hook_pvt;
 
    ast_debug(1, "Transferer on attended transfer %p pressed threeway sequence\n", props);
    stimulate_attended_transfer(props, STIMULUS_DTMF_ATXFER_THREEWAY);
    return 0;
}

References ast_debug, stimulate_attended_transfer(), and STIMULUS_DTMF_ATXFER_THREEWAY.

Referenced by add_transferer_role(), and bridge_personality_atxfer_push().

atxfer_transferer_hangup()

static int atxfer_transferer_hangup ( struct ast_bridge_channel *  bridge_channel, void *  hook_pvt  )

static

Hangup hook for transferer channel.

Sends a stimulus to the attended transfer monitor thread that the transferer has hung up.

Definition at line 2811 of file bridge_basic.c.

{
    struct attended_transfer_properties *props = hook_pvt;
 
    ast_debug(1, "Transferer on attended transfer %p hung up\n", props);
    stimulate_attended_transfer(props, STIMULUS_TRANSFERER_HANGUP);
    return 0;
}

References ast_debug, stimulate_attended_transfer(), and STIMULUS_TRANSFERER_HANGUP.

Referenced by bridge_personality_atxfer_push().

basic_hangup_hook()

static int basic_hangup_hook ( struct ast_bridge_channel *  bridge_channel, void *  hook_pvt  )

static

Definition at line 290 of file bridge_basic.c.

{
    int bridge_count = 0;
    struct ast_bridge_channel *iter;
 
    ast_bridge_channel_lock_bridge(bridge_channel);
    AST_LIST_TRAVERSE(&bridge_channel->bridge->channels, iter, entry) {
        if (iter != bridge_channel && iter->state == BRIDGE_CHANNEL_STATE_WAIT) {
            ++bridge_count;
        }
    }
    if (2 <= bridge_count) {
        /* Just allow this channel to leave the multi-party bridge. */
        ast_bridge_channel_leave_bridge(bridge_channel,
            BRIDGE_CHANNEL_STATE_END_NO_DISSOLVE, 0);
    }
    ast_bridge_unlock(bridge_channel->bridge);
    return 0;
}

References ast_bridge_channel_leave_bridge(), ast_bridge_channel_lock_bridge(), ast_bridge_unlock, AST_LIST_TRAVERSE, ast_bridge_channel::bridge, BRIDGE_CHANNEL_STATE_END_NO_DISSOLVE, BRIDGE_CHANNEL_STATE_WAIT, ast_bridge::channels, and ast_bridge_channel::state.

Referenced by add_normal_hooks().

blind_transfer_cb()

static void blind_transfer_cb ( struct ast_channel *  new_channel, struct transfer_channel_data *  user_data_wrapper, enum ast_transfer_type  transfer_type  )

static

Definition at line 3499 of file bridge_basic.c.

{
    struct ast_channel *transferer_channel = user_data_wrapper->data;
 
    if (transfer_type == AST_BRIDGE_TRANSFER_MULTI_PARTY) {
        copy_caller_data(new_channel, transferer_channel);
    }
}

References AST_BRIDGE_TRANSFER_MULTI_PARTY, copy_caller_data(), and transfer_channel_data::data.

Referenced by feature_blind_transfer().

blond_enter()

static int blond_enter ( struct attended_transfer_properties *  props )

static

Definition at line 2338 of file bridge_basic.c.

{
    struct ast_channel *transferee_channel;
    struct ast_channel *target_channel;
 
    get_transfer_parties(props->transferer, props->transferee_bridge, props->target_bridge,
            &transferee_channel, &target_channel);
    bridge_merge(props->transferee_bridge, props->target_bridge, &props->transferer, 1);
    ringing(props->transfer_target);
    publish_transfer_success(props, transferee_channel, target_channel);
 
    ast_channel_cleanup(transferee_channel);
    ast_channel_cleanup(target_channel);
    return 0;
}

References ast_channel_cleanup, bridge_merge(), get_transfer_parties(), publish_transfer_success(), ringing(), attended_transfer_properties::target_bridge, attended_transfer_properties::transfer_target, attended_transfer_properties::transferee_bridge, and attended_transfer_properties::transferer.

Referenced by blond_nonfinal_enter().

blond_nonfinal_enter()

static int blond_nonfinal_enter ( struct attended_transfer_properties *  props )

static

Definition at line 2354 of file bridge_basic.c.

{
    int res;
    props->superstate = SUPERSTATE_RECALL;
    /* move the transfer target to the recall target along with its reference */
    props->recall_target = ast_channel_ref(props->transfer_target);
    res = blond_enter(props);
    props->transfer_target = ast_channel_unref(props->transfer_target);
    return res;
}

References ast_channel_ref, ast_channel_unref, blond_enter(), attended_transfer_properties::recall_target, attended_transfer_properties::superstate, SUPERSTATE_RECALL, and attended_transfer_properties::transfer_target.

blond_nonfinal_exit()

static enum attended_transfer_state blond_nonfinal_exit ( struct attended_transfer_properties *  props, enum attended_transfer_stimulus  stimulus  )

static

Definition at line 2365 of file bridge_basic.c.

{
    switch (stimulus) {
    case STIMULUS_TRANSFEREE_HANGUP:
        return TRANSFER_FAIL;
    case STIMULUS_RECALL_TARGET_ANSWER:
        return TRANSFER_RESUME;
    case STIMULUS_TIMEOUT:
        ast_softhangup(props->recall_target, AST_SOFTHANGUP_EXPLICIT);
        /* It is possible before we hung them up that they queued up a recall target answer
         * so we remove it if present as it should not exist.
         */
        remove_attended_transfer_stimulus(props, STIMULUS_RECALL_TARGET_ANSWER);
    case STIMULUS_RECALL_TARGET_HANGUP:
        props->recall_target = ast_channel_unref(props->recall_target);
        return TRANSFER_RECALLING;
    case STIMULUS_NONE:
    case STIMULUS_DTMF_ATXFER_ABORT:
    case STIMULUS_DTMF_ATXFER_COMPLETE:
    case STIMULUS_DTMF_ATXFER_THREEWAY:
    case STIMULUS_DTMF_ATXFER_SWAP:
    case STIMULUS_TRANSFERER_HANGUP:
    case STIMULUS_TRANSFER_TARGET_HANGUP:
    case STIMULUS_TRANSFER_TARGET_ANSWER:
    default:
        ast_log(LOG_WARNING, "Unexpected stimulus '%s' received in attended transfer state '%s'\n",
                stimulus_strs[stimulus], state_properties[props->state].state_name);
        return props->state;
    }
}

References ast_channel_unref, ast_log, ast_softhangup(), AST_SOFTHANGUP_EXPLICIT, LOG_WARNING, attended_transfer_properties::recall_target, remove_attended_transfer_stimulus(), attended_transfer_properties::state, attended_transfer_state_properties::state_name, state_properties, STIMULUS_DTMF_ATXFER_ABORT, STIMULUS_DTMF_ATXFER_COMPLETE, STIMULUS_DTMF_ATXFER_SWAP, STIMULUS_DTMF_ATXFER_THREEWAY, STIMULUS_NONE, STIMULUS_RECALL_TARGET_ANSWER, STIMULUS_RECALL_TARGET_HANGUP, stimulus_strs, STIMULUS_TIMEOUT, STIMULUS_TRANSFER_TARGET_ANSWER, STIMULUS_TRANSFER_TARGET_HANGUP, STIMULUS_TRANSFEREE_HANGUP, STIMULUS_TRANSFERER_HANGUP, TRANSFER_FAIL, TRANSFER_RECALLING, and TRANSFER_RESUME.

bridge_basic_change_personality()

static void bridge_basic_change_personality ( struct ast_bridge *  bridge, enum bridge_basic_personality_type  type, void *  user_data  )

static

Change basic bridge personality.

Changing personalities allows for the bridge to remain in use but have properties such as its v_table and its flags change.

Parameters

bridge	The bridge
type	The personality to change the bridge to
user_data	Private data to attach to the personality.

Definition at line 3568 of file bridge_basic.c.

{
    struct bridge_basic_personality *personality = bridge->personality;
    SCOPED_LOCK(lock, bridge, ast_bridge_lock, ast_bridge_unlock);
 
    remove_hooks_on_personality_change(bridge);
 
    ao2_cleanup(personality->details[personality->current].pvt);
    personality->details[personality->current].pvt = NULL;
    ast_clear_flag(&bridge->feature_flags, AST_FLAGS_ALL);
 
    personality->current = type;
    if (user_data) {
        ao2_ref(user_data, +1);
    }
    personality->details[personality->current].pvt = user_data;
    ast_set_flag(&bridge->feature_flags, personality->details[personality->current].bridge_flags);
    if (personality->details[personality->current].on_personality_change) {
        personality->details[personality->current].on_personality_change(bridge);
    }
}

References ao2_cleanup, ao2_ref, ast_bridge_lock, ast_bridge_unlock, ast_clear_flag, AST_FLAGS_ALL, ast_set_flag, personality_details::bridge_flags, bridge_basic_personality::current, bridge_basic_personality::details, ast_bridge::feature_flags, lock, NULL, personality_details::on_personality_change, ast_bridge::personality, personality_details::pvt, remove_hooks_on_personality_change(), SCOPED_LOCK, and type.

Referenced by attended_transfer_properties_shutdown(), consulting_exit(), and feature_attended_transfer().

bridge_basic_destroy()

static void bridge_basic_destroy ( struct ast_bridge *  self )

static

Definition at line 702 of file bridge_basic.c.

{
    struct bridge_basic_personality *personality = self->personality;
 
    ao2_cleanup(personality);
 
    ast_bridge_base_v_table.destroy(self);
}

References ao2_cleanup, ast_bridge_base_v_table, ast_bridge_methods::destroy, and ast_bridge::personality.

Referenced by ast_bridging_init_basic().

bridge_basic_personality_alloc()

static struct ast_bridge * bridge_basic_personality_alloc ( struct ast_bridge *  bridge )

static

Definition at line 3632 of file bridge_basic.c.

{
    struct bridge_basic_personality *personality;
    int i;
 
    if (!bridge) {
        return NULL;
    }
 
    personality = ao2_alloc(sizeof(*personality), personality_destructor);
    if (!personality) {
        ao2_ref(bridge, -1);
        return NULL;
    }
    for (i = 0; i < BRIDGE_BASIC_PERSONALITY_END; ++i) {
        init_details(&personality->details[i], i);
    }
    personality->current = BRIDGE_BASIC_PERSONALITY_NORMAL;
    bridge->personality = personality;
 
    return bridge;
}

References ao2_alloc, ao2_ref, BRIDGE_BASIC_PERSONALITY_END, BRIDGE_BASIC_PERSONALITY_NORMAL, bridge_basic_personality::current, bridge_basic_personality::details, init_details(), NULL, ast_bridge::personality, and personality_destructor().

Referenced by ast_bridge_basic_new().

bridge_basic_pull()

static void bridge_basic_pull ( struct ast_bridge *  self, struct ast_bridge_channel *  bridge_channel  )

static

Definition at line 687 of file bridge_basic.c.

{
    struct bridge_basic_personality *personality = self->personality;
 
    ast_assert(personality != NULL);
 
    if (personality->details[personality->current].v_table->pull) {
        personality->details[personality->current].v_table->pull(self, bridge_channel);
    }
 
    ast_bridge_channel_update_accountcodes(NULL, bridge_channel);
 
    ast_bridge_base_v_table.pull(self, bridge_channel);
}

References ast_assert, ast_bridge_base_v_table, ast_bridge_channel_update_accountcodes(), bridge_basic_personality::current, bridge_basic_personality::details, NULL, ast_bridge::personality, ast_bridge_methods::pull, and personality_details::v_table.

Referenced by ast_bridging_init_basic().

bridge_basic_push()

static int bridge_basic_push ( struct ast_bridge *  self, struct ast_bridge_channel *  bridge_channel, struct ast_bridge_channel *  swap  )

static

Definition at line 670 of file bridge_basic.c.

{
    struct bridge_basic_personality *personality = self->personality;
 
    ast_assert(personality != NULL);
 
    if (personality->details[personality->current].v_table->push
        && personality->details[personality->current].v_table->push(self, bridge_channel, swap)) {
        return -1;
    }
 
    ast_bridge_channel_update_linkedids(bridge_channel, swap);
    ast_bridge_channel_update_accountcodes(bridge_channel, swap);
 
    return ast_bridge_base_v_table.push(self, bridge_channel, swap);
}

References ast_assert, ast_bridge_base_v_table, ast_bridge_channel_update_accountcodes(), ast_bridge_channel_update_linkedids(), bridge_basic_personality::current, bridge_basic_personality::details, NULL, ast_bridge::personality, ast_bridge_methods::push, and personality_details::v_table.

Referenced by ast_bridging_init_basic().

bridge_basic_setup_features()

static int bridge_basic_setup_features ( struct ast_bridge_channel *  bridge_channel )

static

Definition at line 630 of file bridge_basic.c.

{
    int res = 0;
 
    res |= setup_bridge_features_builtin(bridge_channel->features, bridge_channel->chan);
    res |= setup_bridge_features_dynamic(bridge_channel->features, bridge_channel->chan);
 
    return res;
}

References ast_bridge_channel::chan, ast_bridge_channel::features, setup_bridge_features_builtin(), and setup_bridge_features_dynamic().

Referenced by add_normal_hooks().

bridge_features_ds_set_full()

static int bridge_features_ds_set_full ( struct ast_channel *  chan, struct ast_flags *  flags, int  replace  )

static

Definition at line 224 of file bridge_basic.c.

{
    struct ast_datastore *datastore;
    struct ast_flags *ds_flags;
 
    datastore = ast_channel_datastore_find(chan, &dtmf_features_info, NULL);
    if (datastore) {
        ds_flags = datastore->data;
        if (replace) {
            *ds_flags = *flags;
        } else {
            flags->flags = flags->flags | ds_flags->flags;
            *ds_flags = *flags;
        }
        return 0;
    }
 
    datastore = ast_datastore_alloc(&dtmf_features_info, NULL);
    if (!datastore) {
        return -1;
    }
 
    ds_flags = ast_malloc(sizeof(*ds_flags));
    if (!ds_flags) {
        ast_datastore_free(datastore);
        return -1;
    }
 
    *ds_flags = *flags;
    datastore->data = ds_flags;
    ast_channel_datastore_add(chan, datastore);
    return 0;
}

References ast_channel_datastore_add(), ast_channel_datastore_find(), ast_datastore_alloc, ast_datastore_free(), ast_malloc, ast_datastore::data, dtmf_features_info, ast_flags::flags, NULL, and replace().

Referenced by ast_bridge_features_ds_append(), and ast_bridge_features_ds_set().

bridge_hold()

static void bridge_hold ( struct ast_bridge *  bridge )

static

Helper method to send a hold frame to all channels in a bridge.

Definition at line 1860 of file bridge_basic.c.

{
    struct ast_frame hold = {
        .frametype = AST_FRAME_CONTROL,
        .subclass.integer = AST_CONTROL_HOLD,
    };
 
    ast_bridge_queue_everyone_else(bridge, NULL, &hold);
}

References ast_bridge_queue_everyone_else(), AST_CONTROL_HOLD, AST_FRAME_CONTROL, hold(), and NULL.

Referenced by wait_to_recall_enter(), and wait_to_retransfer_enter().

bridge_merge()

static void bridge_merge ( struct ast_bridge *  dest, struct ast_bridge *  src, struct ast_channel **  kick_channels, unsigned int  num_channels  )

static

Wrapper for bridge_do_merge.

Definition at line 1913 of file bridge_basic.c.

{
    struct ast_bridge_channel **kick_bridge_channels = num_channels ?
        ast_alloca(num_channels * sizeof(*kick_bridge_channels)) : NULL;
    int i;
    int num_bridge_channels = 0;
 
    ast_bridge_lock_both(dest, src);
 
    for (i = 0; i < num_channels; ++i) {
        struct ast_bridge_channel *kick_bridge_channel;
 
        kick_bridge_channel = bridge_find_channel(src, kick_channels[i]);
        if (!kick_bridge_channel) {
            kick_bridge_channel = bridge_find_channel(dest, kick_channels[i]);
        }
 
        /* It's possible (and fine) for the bridge channel to be NULL at this point if the
         * channel has hung up already. If that happens, we can just remove it from the list
         * of bridge channels to kick from the bridge
         */
        if (!kick_bridge_channel) {
            continue;
        }
 
        kick_bridge_channels[num_bridge_channels++] = kick_bridge_channel;
    }
 
    bridge_do_merge(dest, src, kick_bridge_channels, num_bridge_channels, 0);
    ast_bridge_unlock(dest);
    ast_bridge_unlock(src);
}

References ast_alloca, ast_bridge_lock_both, ast_bridge_unlock, bridge_do_merge(), bridge_find_channel(), and NULL.

Referenced by blond_enter(), complete_enter(), and threeway_enter().

bridge_move()

static void bridge_move ( struct ast_bridge *  dest, struct ast_bridge *  src, struct ast_channel *  channel, struct ast_channel *  swap  )

static

Wrapper for bridge_do_move.

Definition at line 1886 of file bridge_basic.c.

{
    struct ast_bridge_channel *bridge_channel;
 
    ast_bridge_lock_both(src, dest);
 
    ast_channel_lock(channel);
    bridge_channel = ast_channel_get_bridge_channel(channel);
    ast_channel_unlock(channel);
 
    if (bridge_channel) {
        ao2_lock(bridge_channel);
        bridge_channel->swap = swap;
        ao2_unlock(bridge_channel);
 
        bridge_do_move(dest, bridge_channel, 1, 0);
    }
 
    ast_bridge_unlock(dest);
    ast_bridge_unlock(src);
 
    ao2_cleanup(bridge_channel);
}

References ao2_cleanup, ao2_lock, ao2_unlock, ast_bridge_lock_both, ast_bridge_unlock, ast_channel_get_bridge_channel(), ast_channel_lock, ast_channel_unlock, bridge_do_move(), and ast_bridge_channel::swap.

Referenced by calling_target_enter(), consulting_exit(), double_checking_exit(), hesitant_enter(), and rebridge_enter().

bridge_personality_atxfer_pull()

static void bridge_personality_atxfer_pull ( struct ast_bridge *  self, struct ast_bridge_channel *  bridge_channel  )

static

Definition at line 2994 of file bridge_basic.c.

{
    struct bridge_basic_personality *personality = self->personality;
    struct attended_transfer_properties *props = personality->details[personality->current].pvt;
 
    switch (props->superstate) {
    case SUPERSTATE_TRANSFER:
        transfer_pull(self, bridge_channel, props);
        break;
    case SUPERSTATE_RECALL:
        recall_pull(self, bridge_channel, props);
        break;
    }
}

References bridge_basic_personality::current, bridge_basic_personality::details, ast_bridge::personality, personality_details::pvt, recall_pull(), attended_transfer_properties::superstate, SUPERSTATE_RECALL, SUPERSTATE_TRANSFER, and transfer_pull().

Referenced by ast_bridging_init_basic().

bridge_personality_atxfer_push()

static int bridge_personality_atxfer_push ( struct ast_bridge *  self, struct ast_bridge_channel *  bridge_channel, struct ast_bridge_channel *  swap  )

static

Definition at line 2869 of file bridge_basic.c.

{
    const char *abort_dtmf;
    const char *complete_dtmf;
    const char *threeway_dtmf;
    const char *swap_dtmf;
    struct bridge_basic_personality *personality = self->personality;
 
    if (!ast_channel_has_role(bridge_channel->chan, AST_TRANSFERER_ROLE_NAME)) {
        return 0;
    }
 
    abort_dtmf = ast_channel_get_role_option(bridge_channel->chan, AST_TRANSFERER_ROLE_NAME, "abort");
    complete_dtmf = ast_channel_get_role_option(bridge_channel->chan, AST_TRANSFERER_ROLE_NAME, "complete");
    threeway_dtmf = ast_channel_get_role_option(bridge_channel->chan, AST_TRANSFERER_ROLE_NAME, "threeway");
    swap_dtmf = ast_channel_get_role_option(bridge_channel->chan, AST_TRANSFERER_ROLE_NAME, "swap");
 
    if (!ast_strlen_zero(abort_dtmf) && ast_bridge_dtmf_hook(bridge_channel->features,
            abort_dtmf, atxfer_abort, personality->details[personality->current].pvt, NULL,
            AST_BRIDGE_HOOK_REMOVE_ON_PERSONALITY_CHANGE | AST_BRIDGE_HOOK_REMOVE_ON_PULL)) {
        return -1;
    }
    if (!ast_strlen_zero(complete_dtmf) && ast_bridge_dtmf_hook(bridge_channel->features,
            complete_dtmf, atxfer_complete, personality->details[personality->current].pvt, NULL,
            AST_BRIDGE_HOOK_REMOVE_ON_PERSONALITY_CHANGE | AST_BRIDGE_HOOK_REMOVE_ON_PULL)) {
        return -1;
    }
    if (!ast_strlen_zero(threeway_dtmf) && ast_bridge_dtmf_hook(bridge_channel->features,
            threeway_dtmf, atxfer_threeway, personality->details[personality->current].pvt, NULL,
            AST_BRIDGE_HOOK_REMOVE_ON_PERSONALITY_CHANGE | AST_BRIDGE_HOOK_REMOVE_ON_PULL)) {
        return -1;
    }
    if (!ast_strlen_zero(swap_dtmf) && ast_bridge_dtmf_hook(bridge_channel->features,
            swap_dtmf, atxfer_swap, personality->details[personality->current].pvt, NULL,
            AST_BRIDGE_HOOK_REMOVE_ON_PERSONALITY_CHANGE | AST_BRIDGE_HOOK_REMOVE_ON_PULL)) {
        return -1;
    }
    if (ast_bridge_hangup_hook(bridge_channel->features, atxfer_transferer_hangup,
            personality->details[personality->current].pvt, NULL,
            AST_BRIDGE_HOOK_REMOVE_ON_PERSONALITY_CHANGE | AST_BRIDGE_HOOK_REMOVE_ON_PULL)) {
        return -1;
    }
 
    return 0;
}

References ast_bridge_dtmf_hook(), ast_bridge_hangup_hook(), AST_BRIDGE_HOOK_REMOVE_ON_PERSONALITY_CHANGE, AST_BRIDGE_HOOK_REMOVE_ON_PULL, ast_channel_get_role_option(), ast_channel_has_role(), ast_strlen_zero(), AST_TRANSFERER_ROLE_NAME, atxfer_abort(), atxfer_complete(), atxfer_swap(), atxfer_threeway(), atxfer_transferer_hangup(), ast_bridge_channel::chan, bridge_basic_personality::current, bridge_basic_personality::details, ast_bridge_channel::features, NULL, ast_bridge::personality, and personality_details::pvt.

Referenced by ast_bridging_init_basic().

bridge_personality_normal_push()

static int bridge_personality_normal_push ( struct ast_bridge *  self, struct ast_bridge_channel *  bridge_channel, struct ast_bridge_channel *  swap  )

static

Definition at line 661 of file bridge_basic.c.

{
    if (add_normal_hooks(self, bridge_channel)) {
        return -1;
    }
 
    return 0;
}

References add_normal_hooks().

Referenced by ast_bridging_init_basic().

bridge_ringing()

static void bridge_ringing ( struct ast_bridge *  bridge )

static

Helper method to send a ringing indication to all channels in a bridge.

Definition at line 1847 of file bridge_basic.c.

{
    struct ast_frame ringing = {
        .frametype = AST_FRAME_CONTROL,
        .subclass.integer = AST_CONTROL_RINGING,
    };
 
    ast_bridge_queue_everyone_else(bridge, NULL, &ringing);
}

References ast_bridge_queue_everyone_else(), AST_CONTROL_RINGING, AST_FRAME_CONTROL, NULL, and ringing().

Referenced by recalling_enter().

bridge_unhold()

static void bridge_unhold ( struct ast_bridge *  bridge )

static

Helper method to send an unhold frame to all channels in a bridge.

Definition at line 1873 of file bridge_basic.c.

{
    struct ast_frame unhold = {
        .frametype = AST_FRAME_CONTROL,
        .subclass.integer = AST_CONTROL_UNHOLD,
    };
 
    ast_bridge_queue_everyone_else(bridge, NULL, &unhold);
}

References ast_bridge_queue_everyone_else(), AST_CONTROL_UNHOLD, AST_FRAME_CONTROL, NULL, and unhold().

Referenced by calling_target_exit(), consulting_exit(), double_checking_exit(), wait_to_recall_exit(), and wait_to_retransfer_exit().

build_dtmf_features()

static int build_dtmf_features ( struct ast_flags *  flags, const char *  features  )

static

Definition at line 162 of file bridge_basic.c.

{
    const char *feature;
 
    char missing_features[strlen(features) + 1];
    size_t number_of_missing_features = 0;
 
    for (feature = features; *feature; feature++) {
        if (!isupper(*feature)) {
            ast_log(LOG_ERROR, "Features string '%s' rejected because it contains non-uppercase feature.\n", features);
            return -1;
        }
 
        if (set_feature_flag_from_char(flags, *feature)) {
            missing_features[number_of_missing_features++] = *feature;
        }
    }
 
    missing_features[number_of_missing_features] = '\0';
 
    if (number_of_missing_features) {
        ast_log(LOG_WARNING, "Features '%s' from features string '%s' can not be applied.\n", missing_features, features);
    }
 
    return 0;
}

References ast_log, LOG_ERROR, LOG_WARNING, and set_feature_flag_from_char().

Referenced by ast_bridge_features_ds_set_string().

builtin_feature_get_exten()

static int builtin_feature_get_exten ( struct ast_channel *  chan, const char *  feature_name, char *  buf, size_t  len  )

static

Definition at line 346 of file bridge_basic.c.

{
    SCOPED_CHANNELLOCK(lock, chan);
 
    return ast_get_builtin_feature(chan, feature_name, buf, len);
}

References ast_get_builtin_feature(), buf, len(), lock, and SCOPED_CHANNELLOCK.

Referenced by builtin_features_helper().

builtin_features_helper()

static int builtin_features_helper ( struct ast_bridge_features *  features, struct ast_channel *  chan, struct ast_flags *  flags, unsigned int  feature_flag, const char *  feature_name, enum ast_bridge_builtin_feature  feature_bridge  )

static

Definition at line 368 of file bridge_basic.c.

{
    char dtmf[AST_FEATURE_MAX_LEN];
    int res;
 
    res = 0;
    if (ast_test_flag(flags, feature_flag)
        && !builtin_feature_get_exten(chan, feature_name, dtmf, sizeof(dtmf))
        && !ast_strlen_zero(dtmf)) {
        res = ast_bridge_features_enable(features, feature_bridge, dtmf, NULL, NULL,
            AST_BRIDGE_HOOK_REMOVE_ON_PULL | AST_BRIDGE_HOOK_REMOVE_ON_PERSONALITY_CHANGE);
        if (res) {
            ast_log(LOG_ERROR, "Channel %s: Requested DTMF feature %s not available.\n",
                ast_channel_name(chan), feature_name);
        }
    }
 
    return res;
}

References ast_bridge_features_enable(), AST_BRIDGE_HOOK_REMOVE_ON_PERSONALITY_CHANGE, AST_BRIDGE_HOOK_REMOVE_ON_PULL, ast_channel_name(), AST_FEATURE_MAX_LEN, ast_log, ast_strlen_zero(), ast_test_flag, builtin_feature_get_exten(), LOG_ERROR, and NULL.

Referenced by setup_bridge_features_builtin().

calling_target_enter()

static int calling_target_enter ( struct attended_transfer_properties *  props )

static

Definition at line 2116 of file bridge_basic.c.

{
    bridge_move(props->target_bridge, props->transferee_bridge, props->transferer, NULL);
    return 0;
}

References bridge_move(), NULL, attended_transfer_properties::target_bridge, attended_transfer_properties::transferee_bridge, and attended_transfer_properties::transferer.

calling_target_exit()

static enum attended_transfer_state calling_target_exit ( struct attended_transfer_properties *  props, enum attended_transfer_stimulus  stimulus  )

static

Definition at line 2122 of file bridge_basic.c.

{
    switch (stimulus) {
    case STIMULUS_TRANSFEREE_HANGUP:
        play_failsound(props->transferer);
        publish_transfer_fail(props);
        return TRANSFER_FAIL;
    case STIMULUS_DTMF_ATXFER_COMPLETE:
    case STIMULUS_TRANSFERER_HANGUP:
        bridge_unhold(props->transferee_bridge);
        return props->atxferdropcall ? TRANSFER_BLOND : TRANSFER_BLOND_NONFINAL;
    case STIMULUS_TRANSFER_TARGET_ANSWER:
        return TRANSFER_CONSULTING;
    case STIMULUS_TRANSFER_TARGET_HANGUP:
    case STIMULUS_TIMEOUT:
    case STIMULUS_DTMF_ATXFER_ABORT:
        play_failsound(props->transferer);
        return TRANSFER_REBRIDGE;
    case STIMULUS_DTMF_ATXFER_THREEWAY:
        bridge_unhold(props->transferee_bridge);
        return TRANSFER_THREEWAY;
    case STIMULUS_DTMF_ATXFER_SWAP:
        return TRANSFER_HESITANT;
    case STIMULUS_NONE:
    case STIMULUS_RECALL_TARGET_ANSWER:
    case STIMULUS_RECALL_TARGET_HANGUP:
    default:
        ast_log(LOG_WARNING, "Unexpected stimulus '%s' received in attended transfer state '%s'\n",
                stimulus_strs[stimulus], state_properties[props->state].state_name);
        return props->state;
    }
}

References ast_log, attended_transfer_properties::atxferdropcall, bridge_unhold(), LOG_WARNING, play_failsound(), publish_transfer_fail(), attended_transfer_properties::state, attended_transfer_state_properties::state_name, state_properties, STIMULUS_DTMF_ATXFER_ABORT, STIMULUS_DTMF_ATXFER_COMPLETE, STIMULUS_DTMF_ATXFER_SWAP, STIMULUS_DTMF_ATXFER_THREEWAY, STIMULUS_NONE, STIMULUS_RECALL_TARGET_ANSWER, STIMULUS_RECALL_TARGET_HANGUP, stimulus_strs, STIMULUS_TIMEOUT, STIMULUS_TRANSFER_TARGET_ANSWER, STIMULUS_TRANSFER_TARGET_HANGUP, STIMULUS_TRANSFEREE_HANGUP, STIMULUS_TRANSFERER_HANGUP, TRANSFER_BLOND, TRANSFER_BLOND_NONFINAL, TRANSFER_CONSULTING, TRANSFER_FAIL, TRANSFER_HESITANT, TRANSFER_REBRIDGE, TRANSFER_THREEWAY, attended_transfer_properties::transferee_bridge, and attended_transfer_properties::transferer.

clear_stimulus_queue()

static void clear_stimulus_queue ( struct attended_transfer_properties *  props )

static

Free backlog of stimuli in the queue.

Definition at line 1508 of file bridge_basic.c.

{
    struct stimulus_list *list;
    SCOPED_AO2LOCK(lock, props);
 
    while ((list = AST_LIST_REMOVE_HEAD(&props->stimulus_queue, next))) {
        ast_free(list);
    }
}

References ast_free, AST_LIST_REMOVE_HEAD, lock, stimulus_list::next, SCOPED_AO2LOCK, and attended_transfer_properties::stimulus_queue.

Referenced by attended_transfer_properties_shutdown().

common_recall_channel_setup()

static void common_recall_channel_setup ( struct ast_channel *  recall, struct ast_channel *  transferer  )

static

Definition at line 2447 of file bridge_basic.c.

{
    ast_callid callid;
 
    callid = ast_read_threadstorage_callid();
    if (callid) {
        ast_channel_callid_set(recall, callid);
    }
 
    ast_channel_inherit_variables(transferer, recall);
    ast_channel_datastore_inherit(transferer, recall);
 
    /*
     * Stage a snapshot to ensure that a snapshot is always done
     * on the recall channel so earlier COLP and CLID setup will
     * get published.
     */
    ast_channel_stage_snapshot(recall);
    ast_channel_req_accountcodes(recall, transferer, AST_CHANNEL_REQUESTOR_REPLACEMENT);
    ast_channel_stage_snapshot_done(recall);
}

References ast_channel_callid_set(), ast_channel_datastore_inherit(), ast_channel_inherit_variables(), ast_channel_req_accountcodes(), AST_CHANNEL_REQUESTOR_REPLACEMENT, ast_channel_stage_snapshot(), ast_channel_stage_snapshot_done(), ast_read_threadstorage_callid(), and attended_transfer_properties::transferer.

Referenced by recalling_enter(), and retransfer_enter().

complete_enter()

static int complete_enter ( struct attended_transfer_properties *  props )

static

Definition at line 2322 of file bridge_basic.c.

{
    struct ast_channel *transferee_channel;
    struct ast_channel *target_channel;
 
    get_transfer_parties(props->transferer, props->transferee_bridge, props->target_bridge,
            &transferee_channel, &target_channel);
    bridge_merge(props->transferee_bridge, props->target_bridge, &props->transferer, 1);
    play_sound(props->transfer_target, props->xfersound);
    publish_transfer_success(props, transferee_channel, target_channel);
 
    ast_channel_cleanup(transferee_channel);
    ast_channel_cleanup(target_channel);
    return 0;
}

References ast_channel_cleanup, bridge_merge(), get_transfer_parties(), play_sound(), publish_transfer_success(), attended_transfer_properties::target_bridge, attended_transfer_properties::transfer_target, attended_transfer_properties::transferee_bridge, attended_transfer_properties::transferer, and attended_transfer_properties::xfersound.

consulting_enter()

static int consulting_enter ( struct attended_transfer_properties *  props )

static

Definition at line 2225 of file bridge_basic.c.

{
    return 0;
}

consulting_exit()

static enum attended_transfer_state consulting_exit ( struct attended_transfer_properties *  props, enum attended_transfer_stimulus  stimulus  )

static

Definition at line 2230 of file bridge_basic.c.

{
    switch (stimulus) {
    case STIMULUS_TRANSFEREE_HANGUP:
        /* This is a one-of-a-kind event. The transferer and transfer target are talking in
         * one bridge, and the transferee has hung up in a separate bridge. In this case, we
         * will change the personality of the transfer target bridge back to normal, and play
         * a sound to the transferer to indicate the transferee is gone.
         */
        bridge_basic_change_personality(props->target_bridge, BRIDGE_BASIC_PERSONALITY_NORMAL, NULL);
        play_failsound(props->transferer);
        ast_bridge_merge_inhibit(props->target_bridge, -1);
        /* These next two lines are here to ensure that our reference to the target bridge
         * is cleaned up properly and that the target bridge is not destroyed when the
         * monitor thread exits
         */
        ao2_ref(props->target_bridge, -1);
        props->target_bridge = NULL;
        return TRANSFER_FAIL;
    case STIMULUS_TRANSFERER_HANGUP:
    case STIMULUS_DTMF_ATXFER_COMPLETE:
        /* We know the transferer is in the target_bridge, so take the other bridge off hold */
        bridge_unhold(props->transferee_bridge);
        return TRANSFER_COMPLETE;
    case STIMULUS_TRANSFER_TARGET_HANGUP:
        return TRANSFER_REBRIDGE;
    case STIMULUS_DTMF_ATXFER_ABORT:
        play_failsound(props->transferer);
        return TRANSFER_REBRIDGE;
    case STIMULUS_DTMF_ATXFER_THREEWAY:
        bridge_unhold(props->transferee_bridge);
        return TRANSFER_THREEWAY;
    case STIMULUS_DTMF_ATXFER_SWAP:
        hold(props->transferer);
        bridge_move(props->transferee_bridge, props->target_bridge, props->transferer, NULL);
        unhold(props->transferer);
        return TRANSFER_DOUBLECHECKING;
    case STIMULUS_NONE:
    case STIMULUS_TIMEOUT:
    case STIMULUS_TRANSFER_TARGET_ANSWER:
    case STIMULUS_RECALL_TARGET_HANGUP:
    case STIMULUS_RECALL_TARGET_ANSWER:
    default:
        ast_log(LOG_WARNING, "Unexpected stimulus '%s' received in attended transfer state '%s'\n",
                stimulus_strs[stimulus], state_properties[props->state].state_name);
        return props->state;
    }
}

References ao2_ref, ast_bridge_merge_inhibit(), ast_log, bridge_basic_change_personality(), BRIDGE_BASIC_PERSONALITY_NORMAL, bridge_move(), bridge_unhold(), hold(), LOG_WARNING, NULL, play_failsound(), attended_transfer_properties::state, attended_transfer_state_properties::state_name, state_properties, STIMULUS_DTMF_ATXFER_ABORT, STIMULUS_DTMF_ATXFER_COMPLETE, STIMULUS_DTMF_ATXFER_SWAP, STIMULUS_DTMF_ATXFER_THREEWAY, STIMULUS_NONE, STIMULUS_RECALL_TARGET_ANSWER, STIMULUS_RECALL_TARGET_HANGUP, stimulus_strs, STIMULUS_TIMEOUT, STIMULUS_TRANSFER_TARGET_ANSWER, STIMULUS_TRANSFER_TARGET_HANGUP, STIMULUS_TRANSFEREE_HANGUP, STIMULUS_TRANSFERER_HANGUP, attended_transfer_properties::target_bridge, TRANSFER_COMPLETE, TRANSFER_DOUBLECHECKING, TRANSFER_FAIL, TRANSFER_REBRIDGE, TRANSFER_THREEWAY, attended_transfer_properties::transferee_bridge, attended_transfer_properties::transferer, and unhold().

copy_caller_data()

static void copy_caller_data ( struct ast_channel *  dest, struct ast_channel *  caller  )

static

Definition at line 3276 of file bridge_basic.c.

{
    ast_channel_lock_both(caller, dest);
    ast_connected_line_copy_from_caller(ast_channel_connected(dest), ast_channel_caller(caller));
    ast_channel_inherit_variables(caller, dest);
    ast_channel_datastore_inherit(caller, dest);
    ast_channel_unlock(dest);
    ast_channel_unlock(caller);
}

References ast_channel_caller(), ast_channel_connected(), ast_channel_datastore_inherit(), ast_channel_inherit_variables(), ast_channel_lock_both, ast_channel_unlock, and ast_connected_line_copy_from_caller().

Referenced by blind_transfer_cb(), and dial_transfer().

dial_transfer()

static struct ast_channel * dial_transfer ( struct ast_channel *  caller, const char *  destination  )

static

Helper function that creates an outgoing channel and returns it immediately.

Definition at line 3287 of file bridge_basic.c.

{
    struct ast_channel *chan;
    int cause;
    struct ast_format_cap *caps;
 
    ast_channel_lock(caller);
    caps = ao2_bump(ast_channel_nativeformats(caller));
    ast_channel_unlock(caller);
 
    /* Now we request a local channel to prepare to call the destination */
    chan = ast_request("Local", caps, NULL, caller, destination, &cause);
 
    ao2_cleanup(caps);
 
    if (!chan) {
        return NULL;
    }
 
    ast_channel_lock_both(chan, caller);
 
    ast_channel_req_accountcodes(chan, caller, AST_CHANNEL_REQUESTOR_BRIDGE_PEER);
 
    /* Who is transferring the call. */
    pbx_builtin_setvar_helper(chan, "TRANSFERERNAME", ast_channel_name(caller));
 
    ast_bridge_set_transfer_variables(chan, ast_channel_name(caller), 1);
 
    ast_channel_unlock(chan);
    ast_channel_unlock(caller);
 
    /* Before we actually dial out let's inherit appropriate information. */
    copy_caller_data(chan, caller);
 
    return chan;
}

References ao2_bump, ao2_cleanup, ast_bridge_set_transfer_variables(), ast_channel_lock, ast_channel_lock_both, ast_channel_name(), ast_channel_nativeformats(), ast_channel_req_accountcodes(), AST_CHANNEL_REQUESTOR_BRIDGE_PEER, ast_channel_unlock, ast_request(), copy_caller_data(), NULL, and pbx_builtin_setvar_helper().

Referenced by feature_attended_transfer().

double_checking_enter()

static int double_checking_enter ( struct attended_transfer_properties *  props )

static

Definition at line 2280 of file bridge_basic.c.

{
    return 0;
}

double_checking_exit()

static enum attended_transfer_state double_checking_exit ( struct attended_transfer_properties *  props, enum attended_transfer_stimulus  stimulus  )

static

Definition at line 2285 of file bridge_basic.c.

{
    switch (stimulus) {
    case STIMULUS_TRANSFEREE_HANGUP:
        play_failsound(props->transferer);
        publish_transfer_fail(props);
        return TRANSFER_FAIL;
    case STIMULUS_TRANSFERER_HANGUP:
    case STIMULUS_DTMF_ATXFER_COMPLETE:
        /* We know the transferer is in the transferee, so take the other bridge off hold */
        bridge_unhold(props->target_bridge);
        return TRANSFER_COMPLETE;
    case STIMULUS_TRANSFER_TARGET_HANGUP:
    case STIMULUS_DTMF_ATXFER_ABORT:
        play_failsound(props->transferer);
        return TRANSFER_RESUME;
    case STIMULUS_DTMF_ATXFER_THREEWAY:
        bridge_unhold(props->target_bridge);
        return TRANSFER_THREEWAY;
    case STIMULUS_DTMF_ATXFER_SWAP:
        hold(props->transferer);
        bridge_move(props->target_bridge, props->transferee_bridge, props->transferer, NULL);
        unhold(props->transferer);
        return TRANSFER_CONSULTING;
    case STIMULUS_NONE:
    case STIMULUS_TIMEOUT:
    case STIMULUS_TRANSFER_TARGET_ANSWER:
    case STIMULUS_RECALL_TARGET_HANGUP:
    case STIMULUS_RECALL_TARGET_ANSWER:
    default:
        ast_log(LOG_WARNING, "Unexpected stimulus '%s' received in attended transfer state '%s'\n",
                stimulus_strs[stimulus], state_properties[props->state].state_name);
        return props->state;
    }
}

References ast_log, bridge_move(), bridge_unhold(), hold(), LOG_WARNING, NULL, play_failsound(), publish_transfer_fail(), attended_transfer_properties::state, attended_transfer_state_properties::state_name, state_properties, STIMULUS_DTMF_ATXFER_ABORT, STIMULUS_DTMF_ATXFER_COMPLETE, STIMULUS_DTMF_ATXFER_SWAP, STIMULUS_DTMF_ATXFER_THREEWAY, STIMULUS_NONE, STIMULUS_RECALL_TARGET_ANSWER, STIMULUS_RECALL_TARGET_HANGUP, stimulus_strs, STIMULUS_TIMEOUT, STIMULUS_TRANSFER_TARGET_ANSWER, STIMULUS_TRANSFER_TARGET_HANGUP, STIMULUS_TRANSFEREE_HANGUP, STIMULUS_TRANSFERER_HANGUP, attended_transfer_properties::target_bridge, TRANSFER_COMPLETE, TRANSFER_CONSULTING, TRANSFER_FAIL, TRANSFER_RESUME, TRANSFER_THREEWAY, attended_transfer_properties::transferee_bridge, attended_transfer_properties::transferer, and unhold().

dtmf_features_flags_to_string()

static int dtmf_features_flags_to_string ( struct ast_flags *  feature_flags, char *  buffer, size_t  buffer_size  )

static

Definition at line 133 of file bridge_basic.c.

{
    size_t buffer_expended = 0;
    unsigned int cur_feature;
    static const struct {
        char letter;
        unsigned int flag;
    } associations[] = {
        { 'T', AST_FEATURE_REDIRECT },
        { 'K', AST_FEATURE_PARKCALL },
        { 'H', AST_FEATURE_DISCONNECT },
        { 'W', AST_FEATURE_AUTOMON },
        { 'X', AST_FEATURE_AUTOMIXMON },
    };
 
    for (cur_feature = 0; cur_feature < ARRAY_LEN(associations); cur_feature++) {
        if (ast_test_flag(feature_flags, associations[cur_feature].flag)) {
            if (buffer_expended == buffer_size - 1) {
                buffer[buffer_expended] = '\0';
                return -1;
            }
            buffer[buffer_expended++] = associations[cur_feature].letter;
        }
    }
 
    buffer[buffer_expended] = '\0';
    return 0;
}

References ARRAY_LEN, AST_FEATURE_AUTOMIXMON, AST_FEATURE_AUTOMON, AST_FEATURE_DISCONNECT, AST_FEATURE_PARKCALL, AST_FEATURE_REDIRECT, and ast_test_flag.

Referenced by ast_bridge_features_ds_get_string().

dynamic_dtmf_hook_add()

static int dynamic_dtmf_hook_add ( struct ast_bridge_features *  features, unsigned int  flags, const char *  dtmf, const char *  feature_name, const char *  app_name, const char *  app_args, const char *  moh_class  )

static

Definition at line 543 of file bridge_basic.c.

{
    struct dynamic_dtmf_hook_data *hook_data;
    size_t len_name = strlen(app_name) + 1;
    size_t len_args = ast_strlen_zero(app_args) ? 0 : strlen(app_args) + 1;
    size_t len_moh = ast_strlen_zero(moh_class) ? 0 : strlen(moh_class) + 1;
    size_t len_feature = strlen(feature_name) + 1;
    size_t len_data = sizeof(*hook_data) + len_name + len_args + len_moh + len_feature;
    int res;
 
    /* Fill in application run hook data. */
    hook_data = ast_malloc(len_data);
    if (!hook_data) {
        return -1;
    }
    hook_data->flags = flags;
    hook_data->app_args_offset = len_args ? len_name : 0;
    hook_data->moh_offset = len_moh ? len_name + len_args : 0;
    hook_data->feature_offset = len_name + len_args + len_moh;
    strcpy(hook_data->app_name, app_name);/* Safe */
    if (len_args) {
        strcpy(&hook_data->app_name[hook_data->app_args_offset], app_args);/* Safe */
    }
    if (len_moh) {
        strcpy(&hook_data->app_name[hook_data->moh_offset], moh_class);/* Safe */
    }
    strcpy(&hook_data->app_name[hook_data->feature_offset], feature_name);/* Safe */
 
    res = ast_bridge_dtmf_hook(features, dtmf, dynamic_dtmf_hook_trip, hook_data,
        ast_free_ptr,
        AST_BRIDGE_HOOK_REMOVE_ON_PULL | AST_BRIDGE_HOOK_REMOVE_ON_PERSONALITY_CHANGE);
    if (res) {
        ast_free(hook_data);
    }
    return res;
}

References dynamic_dtmf_hook_data::app_args_offset, app_name(), dynamic_dtmf_hook_data::app_name, ast_bridge_dtmf_hook(), AST_BRIDGE_HOOK_REMOVE_ON_PERSONALITY_CHANGE, AST_BRIDGE_HOOK_REMOVE_ON_PULL, ast_free, ast_free_ptr(), ast_malloc, ast_strlen_zero(), dynamic_dtmf_hook_trip(), dynamic_dtmf_hook_data::feature_offset, dynamic_dtmf_hook_data::flags, and dynamic_dtmf_hook_data::moh_offset.

Referenced by setup_dynamic_feature().

dynamic_dtmf_hook_callback()

static void dynamic_dtmf_hook_callback ( struct ast_bridge_channel *  bridge_channel, const void *  payload, size_t  payload_size  )

static

Definition at line 435 of file bridge_basic.c.

{
    struct ast_channel *chan = bridge_channel->chan;
    const struct dynamic_dtmf_hook_run *run_data = payload;
 
    pbx_builtin_setvar_helper(chan, "DYNAMIC_FEATURENAME",
        &run_data->app_name[run_data->feature_offset]);
    pbx_builtin_setvar_helper(chan, "DYNAMIC_WHO_ACTIVATED",
        &run_data->app_name[run_data->activated_offset]);
 
    ast_bridge_channel_run_app(bridge_channel, run_data->app_name,
        run_data->app_args_offset ? &run_data->app_name[run_data->app_args_offset] : NULL,
        run_data->moh_offset ? &run_data->app_name[run_data->moh_offset] : NULL);
}

References dynamic_dtmf_hook_run::activated_offset, dynamic_dtmf_hook_run::app_args_offset, dynamic_dtmf_hook_run::app_name, ast_bridge_channel_run_app(), ast_channel::bridge_channel, ast_bridge_channel::chan, dynamic_dtmf_hook_run::feature_offset, dynamic_dtmf_hook_run::moh_offset, NULL, and pbx_builtin_setvar_helper().

Referenced by dynamic_dtmf_hook_trip().

dynamic_dtmf_hook_trip()

static int dynamic_dtmf_hook_trip ( struct ast_bridge_channel *  bridge_channel, void *  hook_pvt  )

static

Definition at line 475 of file bridge_basic.c.

{
    struct dynamic_dtmf_hook_data *pvt = hook_pvt;
    struct dynamic_dtmf_hook_run *run_data;
    const char *activated_name;
    size_t len_name;
    size_t len_args;
    size_t len_moh;
    size_t len_feature;
    size_t len_activated;
    size_t len_data;
 
    /* Determine lengths of things. */
    len_name = strlen(pvt->app_name) + 1;
    len_args = pvt->app_args_offset ? strlen(&pvt->app_name[pvt->app_args_offset]) + 1 : 0;
    len_moh = pvt->moh_offset ? strlen(&pvt->app_name[pvt->moh_offset]) + 1 : 0;
    len_feature = strlen(&pvt->app_name[pvt->feature_offset]) + 1;
    ast_channel_lock(bridge_channel->chan);
    activated_name = ast_strdupa(ast_channel_name(bridge_channel->chan));
    ast_channel_unlock(bridge_channel->chan);
    len_activated = strlen(activated_name) + 1;
    len_data = sizeof(*run_data) + len_name + len_args + len_moh + len_feature + len_activated;
 
    /* Fill in dynamic feature run hook data. */
    run_data = ast_alloca(len_data);
    run_data->app_args_offset = len_args ? len_name : 0;
    run_data->moh_offset = len_moh ? len_name + len_args : 0;
    run_data->feature_offset = len_name + len_args + len_moh;
    run_data->activated_offset = len_name + len_args + len_moh + len_feature;
    strcpy(run_data->app_name, pvt->app_name);/* Safe */
    if (len_args) {
        strcpy(&run_data->app_name[run_data->app_args_offset],
            &pvt->app_name[pvt->app_args_offset]);/* Safe */
    }
    if (len_moh) {
        strcpy(&run_data->app_name[run_data->moh_offset],
            &pvt->app_name[pvt->moh_offset]);/* Safe */
    }
    strcpy(&run_data->app_name[run_data->feature_offset],
        &pvt->app_name[pvt->feature_offset]);/* Safe */
    strcpy(&run_data->app_name[run_data->activated_offset], activated_name);/* Safe */
 
    if (ast_test_flag(pvt, AST_FEATURE_FLAG_ONPEER)) {
        ast_bridge_channel_write_callback(bridge_channel,
            AST_BRIDGE_CHANNEL_CB_OPTION_MEDIA,
            dynamic_dtmf_hook_callback, run_data, len_data);
    } else {
        dynamic_dtmf_hook_callback(bridge_channel, run_data, len_data);
    }
    return 0;
}

References dynamic_dtmf_hook_run::activated_offset, dynamic_dtmf_hook_run::app_args_offset, dynamic_dtmf_hook_data::app_args_offset, dynamic_dtmf_hook_run::app_name, dynamic_dtmf_hook_data::app_name, ast_alloca, AST_BRIDGE_CHANNEL_CB_OPTION_MEDIA, ast_bridge_channel_write_callback(), ast_channel_lock, ast_channel_name(), ast_channel_unlock, AST_FEATURE_FLAG_ONPEER, ast_strdupa, ast_test_flag, ast_bridge_channel::chan, dynamic_dtmf_hook_callback(), dynamic_dtmf_hook_run::feature_offset, dynamic_dtmf_hook_data::feature_offset, dynamic_dtmf_hook_run::moh_offset, and dynamic_dtmf_hook_data::moh_offset.

Referenced by dynamic_dtmf_hook_add().

fail_enter()

static int fail_enter ( struct attended_transfer_properties *  props )

static

Definition at line 2741 of file bridge_basic.c.

{
    if (props->transferee_bridge) {
        ast_bridge_destroy(props->transferee_bridge, 0);
        props->transferee_bridge = NULL;
    }
    return 0;
}

References ast_bridge_destroy(), NULL, and attended_transfer_properties::transferee_bridge.

feature_attended_transfer()

static int feature_attended_transfer ( struct ast_bridge_channel *  bridge_channel, void *  hook_pvt  )

static

Internal built in feature for attended transfers.

This hook will set up a thread for monitoring the progress of an attended transfer. For more information about attended transfer progress, see documentation on the transfer state machine.

Parameters

bridge_channel	The channel that pressed the attended transfer DTMF sequence
hook_pvt	Structure with further information about the attended transfer

Definition at line 3334 of file bridge_basic.c.

{
    struct ast_bridge_features_attended_transfer *attended_transfer = hook_pvt;
    struct attended_transfer_properties *props;
    struct ast_bridge *bridge;
    char destination[AST_MAX_EXTENSION + AST_MAX_CONTEXT + 1];
    char exten[AST_MAX_EXTENSION] = "";
    pthread_t thread;
 
    /* Inhibit the bridge before we do anything else. */
    bridge = ast_bridge_channel_merge_inhibit(bridge_channel, +1);
 
    ast_verb(3, "Channel %s: Started DTMF attended transfer.\n",
        ast_channel_name(bridge_channel->chan));
 
    if (strcmp(bridge->v_table->name, "basic")) {
        ast_log(LOG_ERROR, "Channel %s: Attended transfer attempted on unsupported bridge type '%s'.\n",
            ast_channel_name(bridge_channel->chan), bridge->v_table->name);
        ast_bridge_merge_inhibit(bridge, -1);
        ao2_ref(bridge, -1);
        return 0;
    }
 
    /* Was the bridge inhibited before we inhibited it? */
    if (1 < bridge->inhibit_merge) {
        /*
         * The peer likely initiated attended transfer at the same time
         * and we lost the race.
         */
        ast_verb(3, "Channel %s: Bridge '%s' does not permit merging at this time.\n",
            ast_channel_name(bridge_channel->chan), bridge->uniqueid);
        ast_bridge_merge_inhibit(bridge, -1);
        ao2_ref(bridge, -1);
        return 0;
    }
 
    props = attended_transfer_properties_alloc(bridge_channel->chan,
        attended_transfer ? attended_transfer->context : NULL);
    if (!props) {
        ast_log(LOG_ERROR, "Channel %s: Unable to allocate control structure for performing attended transfer.\n",
            ast_channel_name(bridge_channel->chan));
        ast_bridge_merge_inhibit(bridge, -1);
        ao2_ref(bridge, -1);
        return 0;
    }
 
    props->transferee_bridge = bridge;
 
    if (add_transferer_role(props->transferer, attended_transfer)) {
        ast_log(LOG_ERROR, "Channel %s: Unable to set transferrer bridge role.\n",
            ast_channel_name(bridge_channel->chan));
        attended_transfer_properties_shutdown(props);
        return 0;
    }
 
    ast_bridge_channel_write_hold(bridge_channel, NULL);
 
    /* Grab the extension to transfer to */
    if (grab_transfer(bridge_channel->chan, exten, sizeof(exten), props->context)) {
        /*
         * This is a normal exit for when the user fails
         * to specify a valid transfer target.  e.g., The user
         * hungup, didn't dial any digits, or dialed an invalid
         * extension.
         */
        ast_verb(3, "Channel %s: Unable to acquire target extension for attended transfer.\n",
            ast_channel_name(bridge_channel->chan));
        ast_bridge_channel_write_unhold(bridge_channel);
        attended_transfer_properties_shutdown(props);
        return 0;
    }
 
    ast_string_field_set(props, exten, exten);
 
    /* Fill the variable with the extension and context we want to call */
    snprintf(destination, sizeof(destination), "%s@%s", props->exten, props->context);
 
    ast_debug(1, "Channel %s: Attended transfer target '%s'\n",
        ast_channel_name(bridge_channel->chan), destination);
 
    /* Get a channel that is the destination we wish to call */
    props->transfer_target = dial_transfer(bridge_channel->chan, destination);
    if (!props->transfer_target) {
        ast_log(LOG_ERROR, "Channel %s: Unable to request outbound channel for attended transfer target.\n",
            ast_channel_name(bridge_channel->chan));
        stream_failsound(props->transferer);
        ast_bridge_channel_write_unhold(bridge_channel);
        attended_transfer_properties_shutdown(props);
        return 0;
    }
 
 
    /* Create a bridge to use to talk to the person we are calling */
    props->target_bridge = ast_bridge_basic_new();
    if (!props->target_bridge) {
        ast_log(LOG_ERROR, "Channel %s: Unable to create bridge for attended transfer target.\n",
            ast_channel_name(bridge_channel->chan));
        stream_failsound(props->transferer);
        ast_bridge_channel_write_unhold(bridge_channel);
        ast_hangup(props->transfer_target);
        props->transfer_target = NULL;
        attended_transfer_properties_shutdown(props);
        return 0;
    }
    ast_bridge_merge_inhibit(props->target_bridge, +1);
 
    if (attach_framehook(props, props->transfer_target)) {
        ast_log(LOG_ERROR, "Channel %s: Unable to attach framehook to transfer target.\n",
            ast_channel_name(bridge_channel->chan));
        stream_failsound(props->transferer);
        ast_bridge_channel_write_unhold(bridge_channel);
        ast_hangup(props->transfer_target);
        props->transfer_target = NULL;
        attended_transfer_properties_shutdown(props);
        return 0;
    }
 
    bridge_basic_change_personality(props->target_bridge,
            BRIDGE_BASIC_PERSONALITY_ATXFER, props);
    bridge_basic_change_personality(bridge,
            BRIDGE_BASIC_PERSONALITY_ATXFER, props);
 
    if (ast_call(props->transfer_target, destination, 0)) {
        ast_log(LOG_ERROR, "Channel %s: Unable to place outbound call to transfer target.\n",
            ast_channel_name(bridge_channel->chan));
        stream_failsound(props->transferer);
        ast_bridge_channel_write_unhold(bridge_channel);
        ast_hangup(props->transfer_target);
        props->transfer_target = NULL;
        attended_transfer_properties_shutdown(props);
        return 0;
    }
 
    /* We increase the refcount of the transfer target because ast_bridge_impart() will
     * steal the reference we already have. We need to keep a reference, so the only
     * choice is to give it a bump
     */
    ast_channel_ref(props->transfer_target);
    if (ast_bridge_impart(props->target_bridge, props->transfer_target, NULL, NULL,
        AST_BRIDGE_IMPART_CHAN_INDEPENDENT)) {
        ast_log(LOG_ERROR, "Channel %s: Unable to place transfer target into bridge.\n",
            ast_channel_name(bridge_channel->chan));
        stream_failsound(props->transferer);
        ast_bridge_channel_write_unhold(bridge_channel);
        ast_hangup(props->transfer_target);
        props->transfer_target = NULL;
        attended_transfer_properties_shutdown(props);
        return 0;
    }
 
    if (ast_pthread_create_detached(&thread, NULL, attended_transfer_monitor_thread, props)) {
        ast_log(LOG_ERROR, "Channel %s: Unable to create monitoring thread for attended transfer.\n",
            ast_channel_name(bridge_channel->chan));
        stream_failsound(props->transferer);
        ast_bridge_channel_write_unhold(bridge_channel);
        attended_transfer_properties_shutdown(props);
        return 0;
    }
 
    /* Once the monitoring thread has been created, it is responsible for destroying all
     * of the necessary components.
     */
    return 0;
}

References add_transferer_role(), ao2_ref, ast_bridge_basic_new(), ast_bridge_channel_merge_inhibit(), ast_bridge_channel_write_hold(), ast_bridge_channel_write_unhold(), ast_bridge_impart(), AST_BRIDGE_IMPART_CHAN_INDEPENDENT, ast_bridge_merge_inhibit(), ast_call(), ast_channel_name(), ast_channel_ref, ast_debug, ast_hangup(), ast_log, AST_MAX_CONTEXT, AST_MAX_EXTENSION, ast_pthread_create_detached, ast_string_field_set, ast_verb, attach_framehook(), attended_transfer_monitor_thread(), attended_transfer_properties_alloc(), attended_transfer_properties_shutdown(), bridge_basic_change_personality(), BRIDGE_BASIC_PERSONALITY_ATXFER, ast_bridge_channel::chan, ast_bridge_features_attended_transfer::context, attended_transfer_properties::context, dial_transfer(), attended_transfer_properties::exten, grab_transfer(), ast_bridge::inhibit_merge, LOG_ERROR, ast_bridge_methods::name, NULL, stream_failsound(), attended_transfer_properties::target_bridge, thread, attended_transfer_properties::transfer_target, attended_transfer_properties::transferee_bridge, attended_transfer_properties::transferer, ast_bridge::uniqueid, and ast_bridge::v_table.

Referenced by ast_bridging_init_basic().

feature_blind_transfer()

static int feature_blind_transfer ( struct ast_bridge_channel *  bridge_channel, void *  hook_pvt  )

static

Internal built in feature for blind transfers.

Definition at line 3510 of file bridge_basic.c.

{
    char xfer_exten[AST_MAX_EXTENSION] = "";
    struct ast_bridge_features_blind_transfer *blind_transfer = hook_pvt;
    const char *xfer_context;
    char *goto_on_blindxfer;
 
    ast_verb(3, "Channel %s: Started DTMF blind transfer.\n",
        ast_channel_name(bridge_channel->chan));
 
    ast_bridge_channel_write_hold(bridge_channel, NULL);
 
    ast_channel_lock(bridge_channel->chan);
    xfer_context = ast_strdupa(get_transfer_context(bridge_channel->chan,
        blind_transfer ? blind_transfer->context : NULL));
    goto_on_blindxfer = ast_strdupa(S_OR(pbx_builtin_getvar_helper(bridge_channel->chan,
        "GOTO_ON_BLINDXFR"), ""));
    ast_channel_unlock(bridge_channel->chan);
 
    /* Grab the extension to transfer to */
    if (grab_transfer(bridge_channel->chan, xfer_exten, sizeof(xfer_exten), xfer_context)) {
        ast_bridge_channel_write_unhold(bridge_channel);
        return 0;
    }
 
    ast_debug(1, "Channel %s: Blind transfer target '%s@%s'\n",
        ast_channel_name(bridge_channel->chan), xfer_exten, xfer_context);
 
    if (!ast_strlen_zero(goto_on_blindxfer)) {
        const char *chan_context;
        const char *chan_exten;
        int chan_priority;
 
        ast_debug(1, "Channel %s: After transfer, transferrer goes to %s\n",
            ast_channel_name(bridge_channel->chan), goto_on_blindxfer);
 
        ast_channel_lock(bridge_channel->chan);
        chan_context = ast_strdupa(ast_channel_context(bridge_channel->chan));
        chan_exten = ast_strdupa(ast_channel_exten(bridge_channel->chan));
        chan_priority = ast_channel_priority(bridge_channel->chan);
        ast_channel_unlock(bridge_channel->chan);
        ast_bridge_set_after_go_on(bridge_channel->chan,
            chan_context, chan_exten, chan_priority, goto_on_blindxfer);
    }
 
    if (ast_bridge_transfer_blind(0, bridge_channel->chan, xfer_exten, xfer_context,
        blind_transfer_cb, bridge_channel->chan) != AST_BRIDGE_TRANSFER_SUCCESS
        && !ast_strlen_zero(goto_on_blindxfer)) {
        ast_bridge_discard_after_goto(bridge_channel->chan);
    }
 
    return 0;
}

References ast_bridge_channel_write_hold(), ast_bridge_channel_write_unhold(), ast_bridge_discard_after_goto(), ast_bridge_set_after_go_on(), ast_bridge_transfer_blind(), AST_BRIDGE_TRANSFER_SUCCESS, ast_channel_context(), ast_channel_exten(), ast_channel_lock, ast_channel_name(), ast_channel_priority(), ast_channel_unlock, ast_debug, AST_MAX_EXTENSION, ast_strdupa, ast_strlen_zero(), ast_verb, blind_transfer_cb(), ast_bridge_channel::chan, ast_bridge_features_blind_transfer::context, get_transfer_context(), grab_transfer(), NULL, pbx_builtin_getvar_helper(), and S_OR.

Referenced by ast_bridging_init_basic().

get_transfer_context()

static const char * get_transfer_context ( struct ast_channel *  transferer, const char *  context  )

static

Definition at line 1379 of file bridge_basic.c.

{
    if (!ast_strlen_zero(context)) {
        return context;
    }
    context = pbx_builtin_getvar_helper(transferer, "TRANSFER_CONTEXT");
    if (!ast_strlen_zero(context)) {
        return context;
    }
    context = ast_channel_context(transferer);
    if (!ast_strlen_zero(context)) {
        return context;
    }
    return "default";
}

References ast_channel_context(), ast_strlen_zero(), voicemailpwcheck::context, pbx_builtin_getvar_helper(), and attended_transfer_properties::transferer.

Referenced by attended_transfer_properties_alloc(), and feature_blind_transfer().

get_transfer_exten()

static const char * get_transfer_exten ( struct ast_channel *  transferer, const char *  exten  )

static

Definition at line 1404 of file bridge_basic.c.

{
    if (!ast_strlen_zero(exten)) {
        return exten;
    }
    exten = pbx_builtin_getvar_helper(transferer, "TRANSFER_EXTEN");
    if (!ast_strlen_zero(exten)) {
        return exten;
    }
    return ""; /* empty default, to get transfer extension from user now */
}

References ast_strlen_zero(), attended_transfer_properties::exten, pbx_builtin_getvar_helper(), and attended_transfer_properties::transferer.

Referenced by grab_transfer().

get_transfer_parties()

static void get_transfer_parties ( struct ast_channel *  transferer, struct ast_bridge *  transferee_bridge, struct ast_bridge *  target_bridge, struct ast_channel **  transferee, struct ast_channel **  transfer_target  )

static

determine transferee and transfer target for an attended transfer

In builtin attended transfers, there is a single transferer channel that jumps between the two bridges involved. At the time the attended transfer occurs, the transferer could be in either bridge, so determining the parties is a bit more complex than normal.

The method used here is to determine which of the two bridges the transferer is in, and grabbing the peer from that bridge. The other bridge, if it only has a single channel in it, has the other desired channel.

Parameters

	transferer	The channel performing the transfer
	transferee_bridge	The bridge that the transferee is in
	target_bridge	The bridge that the transfer target is in
[out]	transferee	The transferee channel
[out]	transfer_target	The transfer target channel

Definition at line 1634 of file bridge_basic.c.

{
    struct ast_bridge *transferer_bridge;
 
    ast_channel_lock(transferer);
    transferer_bridge = ast_channel_get_bridge(transferer);
    ast_channel_unlock(transferer);
 
    if (transferer_bridge == transferee_bridge) {
        get_transfer_parties_transferer_bridge(transferee_bridge, target_bridge,
                transferer, transferee, transfer_target);
    } else if (transferer_bridge == target_bridge) {
        get_transfer_parties_transferer_bridge(target_bridge, transferee_bridge,
                transferer, transfer_target, transferee);
    } else {
        get_transfer_party_non_transferer_bridge(transferee_bridge, transferee);
        get_transfer_party_non_transferer_bridge(target_bridge, transfer_target);
    }
 
    ao2_cleanup(transferer_bridge);
}

References ao2_cleanup, ast_channel_get_bridge(), ast_channel_lock, ast_channel_unlock, get_transfer_parties_transferer_bridge(), and get_transfer_party_non_transferer_bridge().

Referenced by blond_enter(), complete_enter(), and threeway_enter().

get_transfer_parties_transferer_bridge()

static void get_transfer_parties_transferer_bridge ( struct ast_bridge *  transferer_bridge, struct ast_bridge *  other_bridge, struct ast_channel *  transferer, struct ast_channel **  transferer_peer, struct ast_channel **  other_party  )

static

Get the transferee and transfer target when the transferer is in a bridge with one of the desired parties.

Parameters

	transferer_bridge	The bridge the transferer is in
	other_bridge	The bridge the transferer is not in. May be NULL.
	transferer	The transferer party
[out]	transferer_peer	The party that is in the bridge with the transferer
[out]	other_party	The party that is in the other_bridge

Definition at line 1609 of file bridge_basic.c.

{
    *transferer_peer = ast_bridge_peer(transferer_bridge, transferer);
    get_transfer_party_non_transferer_bridge(other_bridge, other_party);
}

References ast_bridge_peer(), and get_transfer_party_non_transferer_bridge().

Referenced by get_transfer_parties().

get_transfer_party_non_transferer_bridge()

static void get_transfer_party_non_transferer_bridge ( struct ast_bridge *  bridge, struct ast_channel **  party  )

static

Get a desired transfer party for a bridge the transferer is not in.

Parameters

	bridge	The bridge to get the party from. May be NULL.
[out]	party	The lone channel in the bridge. Will be set NULL if bridge is NULL or multiple parties are present.

Definition at line 1589 of file bridge_basic.c.

{
    if (bridge && bridge->num_channels == 1) {
        *party = ast_channel_ref(AST_LIST_FIRST(&bridge->channels)->chan);
    } else {
        *party = NULL;
    }
}

References ast_channel_ref, AST_LIST_FIRST, ast_bridge::channels, NULL, and ast_bridge::num_channels.

Referenced by get_transfer_parties(), and get_transfer_parties_transferer_bridge().

grab_transfer()

static int grab_transfer ( struct ast_channel *  chan, char *  exten, size_t  exten_len, const char *  context  )

static

Helper function that presents dialtone and grabs extension.

Return values

0	on success
-1	on failure

Definition at line 3174 of file bridge_basic.c.

{
    int res;
    int digit_timeout;
    int attempts = 0;
    int max_attempts;
    struct ast_features_xfer_config *xfer_cfg;
    char *announce_sound, *retry_sound, *invalid_sound;
    const char *extenoverride;
 
    ast_channel_lock(chan);
    extenoverride = get_transfer_exten(chan, NULL);
 
    if (!ast_strlen_zero(extenoverride)) {
        int extenres = ast_exists_extension(chan, context, extenoverride, 1,
            S_COR(ast_channel_caller(chan)->id.number.valid, ast_channel_caller(chan)->id.number.str, NULL)) ? 1 : 0;
        if (extenres) {
            ast_copy_string(exten, extenoverride, exten_len);
            ast_channel_unlock(chan);
            ast_verb(3, "Transfering call to '%s@%s'", exten, context);
            return 0;
        }
        ast_log(LOG_WARNING, "Override extension '%s' does not exist in context '%s'\n", extenoverride, context);
        /* since we didn't get a valid extension from the channel, fall back and grab it from the user as usual now */
    }
 
    xfer_cfg = ast_get_chan_features_xfer_config(chan);
    if (!xfer_cfg) {
        ast_log(LOG_ERROR, "Channel %s: Unable to get transfer configuration\n",
            ast_channel_name(chan));
        ast_channel_unlock(chan);
        return -1;
    }
    digit_timeout = xfer_cfg->transferdigittimeout * 1000;
    max_attempts = xfer_cfg->transferdialattempts;
    announce_sound = ast_strdupa(xfer_cfg->transferannouncesound);
    retry_sound = ast_strdupa(xfer_cfg->transferretrysound);
    invalid_sound = ast_strdupa(xfer_cfg->transferinvalidsound);
    ao2_ref(xfer_cfg, -1);
    ast_channel_unlock(chan);
 
    /* Play the simple "transfer" prompt out and wait */
    if (!ast_strlen_zero(announce_sound)) {
        res = ast_stream_and_wait(chan, announce_sound, AST_DIGIT_ANY);
        ast_stopstream(chan);
        if (res < 0) {
            /* Hangup or error */
            return -1;
        }
        if (res) {
            /* Store the DTMF digit that interrupted playback of the file. */
            exten[0] = res;
        }
    }
 
    /* Drop to dialtone so they can enter the extension they want to transfer to */
    do {
        ++attempts;
 
        ast_test_suite_event_notify("TRANSFER_BEGIN_DIAL",
                "Channel: %s\r\n"
                "Attempt: %d",
                ast_channel_name(chan), attempts);
        res = ast_app_dtget(chan, context, exten, exten_len, exten_len - 1, digit_timeout);
        ast_test_suite_event_notify("TRANSFER_DIALLED",
                "Channel: %s\r\n"
                "Attempt: %d\r\n"
                "Dialled: %s\r\n"
                "Result: %s",
                ast_channel_name(chan), attempts, exten, res > 0 ? "Success" : "Failure");
        if (res < 0) {
            /* Hangup or error */
            res = -1;
        } else if (!res) {
            /* 0 for invalid extension dialed. */
            if (ast_strlen_zero(exten)) {
                ast_verb(3, "Channel %s: Dialed no digits.\n", ast_channel_name(chan));
            } else {
                ast_verb(3, "Channel %s: Dialed '%s@%s' does not exist.\n",
                    ast_channel_name(chan), exten, context);
            }
            if (attempts < max_attempts) {
                ast_stream_and_wait(chan, retry_sound, AST_DIGIT_NONE);
            } else {
                ast_stream_and_wait(chan, invalid_sound, AST_DIGIT_NONE);
            }
            memset(exten, 0, exten_len);
            res = 1;
        } else {
            /* Dialed extension is valid. */
            res = 0;
        }
    } while (res > 0 && attempts < max_attempts);
 
    ast_test_suite_event_notify("TRANSFER_DIAL_FINAL",
            "Channel: %s\r\n"
            "Result: %s",
            ast_channel_name(chan), res == 0 ? "Success" : "Failure");
 
    return res ? -1 : 0;
}

References ao2_ref, ast_app_dtget(), ast_channel_caller(), ast_channel_lock, ast_channel_name(), ast_channel_unlock, ast_copy_string(), AST_DIGIT_ANY, AST_DIGIT_NONE, ast_exists_extension(), ast_get_chan_features_xfer_config(), ast_log, ast_stopstream(), ast_strdupa, ast_stream_and_wait(), ast_strlen_zero(), ast_test_suite_event_notify, ast_verb, voicemailpwcheck::context, get_transfer_exten(), LOG_ERROR, LOG_WARNING, NULL, S_COR, ast_features_xfer_config::transferannouncesound, ast_features_xfer_config::transferdialattempts, ast_features_xfer_config::transferdigittimeout, ast_features_xfer_config::transferinvalidsound, and ast_features_xfer_config::transferretrysound.

Referenced by feature_attended_transfer(), and feature_blind_transfer().

hesitant_enter()

static int hesitant_enter ( struct attended_transfer_properties *  props )

static

Definition at line 2156 of file bridge_basic.c.

{
    bridge_move(props->transferee_bridge, props->target_bridge, props->transferer, NULL);
    unhold(props->transferer);
    return 0;
}

References bridge_move(), NULL, attended_transfer_properties::target_bridge, attended_transfer_properties::transferee_bridge, attended_transfer_properties::transferer, and unhold().

hesitant_exit()

static enum attended_transfer_state hesitant_exit ( struct attended_transfer_properties *  props, enum attended_transfer_stimulus  stimulus  )

static

Definition at line 2163 of file bridge_basic.c.

{
    switch (stimulus) {
    case STIMULUS_TRANSFEREE_HANGUP:
        play_failsound(props->transferer);
        publish_transfer_fail(props);
        return TRANSFER_FAIL;
    case STIMULUS_DTMF_ATXFER_COMPLETE:
    case STIMULUS_TRANSFERER_HANGUP:
        return props->atxferdropcall ? TRANSFER_BLOND : TRANSFER_BLOND_NONFINAL;
    case STIMULUS_TRANSFER_TARGET_ANSWER:
        return TRANSFER_DOUBLECHECKING;
    case STIMULUS_TRANSFER_TARGET_HANGUP:
    case STIMULUS_TIMEOUT:
    case STIMULUS_DTMF_ATXFER_ABORT:
        play_failsound(props->transferer);
        return TRANSFER_RESUME;
    case STIMULUS_DTMF_ATXFER_THREEWAY:
        return TRANSFER_THREEWAY;
    case STIMULUS_DTMF_ATXFER_SWAP:
        hold(props->transferer);
        return TRANSFER_CALLING_TARGET;
    case STIMULUS_NONE:
    case STIMULUS_RECALL_TARGET_HANGUP:
    case STIMULUS_RECALL_TARGET_ANSWER:
    default:
        ast_log(LOG_WARNING, "Unexpected stimulus '%s' received in attended transfer state '%s'\n",
                stimulus_strs[stimulus], state_properties[props->state].state_name);
        return props->state;
    }
}

References ast_log, attended_transfer_properties::atxferdropcall, hold(), LOG_WARNING, play_failsound(), publish_transfer_fail(), attended_transfer_properties::state, attended_transfer_state_properties::state_name, state_properties, STIMULUS_DTMF_ATXFER_ABORT, STIMULUS_DTMF_ATXFER_COMPLETE, STIMULUS_DTMF_ATXFER_SWAP, STIMULUS_DTMF_ATXFER_THREEWAY, STIMULUS_NONE, STIMULUS_RECALL_TARGET_ANSWER, STIMULUS_RECALL_TARGET_HANGUP, stimulus_strs, STIMULUS_TIMEOUT, STIMULUS_TRANSFER_TARGET_ANSWER, STIMULUS_TRANSFER_TARGET_HANGUP, STIMULUS_TRANSFEREE_HANGUP, STIMULUS_TRANSFERER_HANGUP, TRANSFER_BLOND, TRANSFER_BLOND_NONFINAL, TRANSFER_CALLING_TARGET, TRANSFER_DOUBLECHECKING, TRANSFER_FAIL, TRANSFER_RESUME, TRANSFER_THREEWAY, and attended_transfer_properties::transferer.

hold()

static void hold ( struct ast_channel *  chan )

static

Helper method to place a channel in a bridge on hold.

Definition at line 1788 of file bridge_basic.c.

{
    struct ast_bridge_channel *bridge_channel;
 
    if (!chan) {
        return;
    }
 
    ast_channel_lock(chan);
    bridge_channel = ast_channel_get_bridge_channel(chan);
    ast_channel_unlock(chan);
 
    if (bridge_channel) {
        ast_bridge_channel_write_hold(bridge_channel, NULL);
        ao2_ref(bridge_channel, -1);
    }
}

References ao2_ref, ast_bridge_channel_write_hold(), ast_channel_get_bridge_channel(), ast_channel_lock, ast_channel_unlock, ast_bridge_channel::chan, and NULL.

Referenced by bridge_hold(), consulting_exit(), double_checking_exit(), hesitant_exit(), and sla_hold_str().

init_details()

static void init_details ( struct personality_details *  details, enum bridge_basic_personality_type  type  )

static

Definition at line 3613 of file bridge_basic.c.

{
    switch (type) {
    case BRIDGE_BASIC_PERSONALITY_NORMAL:
        details->v_table = &personality_normal_v_table;
        details->bridge_flags = NORMAL_FLAGS;
        details->on_personality_change = on_personality_change_normal;
        break;
    case BRIDGE_BASIC_PERSONALITY_ATXFER:
        details->v_table = &personality_atxfer_v_table;
        details->bridge_flags = TRANSFER_FLAGS;
        break;
    default:
        ast_log(LOG_WARNING, "Asked to initialize unexpected basic bridge personality type.\n");
        break;
    }
}

References ast_log, BRIDGE_BASIC_PERSONALITY_ATXFER, BRIDGE_BASIC_PERSONALITY_NORMAL, personality_details::bridge_flags, LOG_WARNING, NORMAL_FLAGS, personality_details::on_personality_change, on_personality_change_normal(), personality_atxfer_v_table, personality_normal_v_table, TRANSFER_FLAGS, type, and personality_details::v_table.

Referenced by bridge_basic_personality_alloc().

on_personality_change_normal()

static void on_personality_change_normal ( struct ast_bridge *  bridge )

static

Definition at line 3601 of file bridge_basic.c.

{
    struct ast_bridge_channel *iter;
 
    AST_LIST_TRAVERSE(&bridge->channels, iter, entry) {
        if (add_normal_hooks(bridge, iter)) {
            ast_log(LOG_WARNING, "Unable to set up bridge hooks for channel %s. Features may not work properly\n",
                    ast_channel_name(iter->chan));
        }
    }
}

References add_normal_hooks(), ast_channel_name(), AST_LIST_TRAVERSE, ast_log, ast_bridge_channel::bridge, ast_bridge_channel::chan, ast_bridge::channels, and LOG_WARNING.

Referenced by init_details().

personality_destructor()

static void personality_destructor ( void *  obj )

static

Definition at line 3591 of file bridge_basic.c.

{
    struct bridge_basic_personality *personality = obj;
    int i;
 
    for (i = 0; i < BRIDGE_BASIC_PERSONALITY_END; ++i) {
        ao2_cleanup(personality->details[i].pvt);
    }
}

References ao2_cleanup, BRIDGE_BASIC_PERSONALITY_END, bridge_basic_personality::details, and personality_details::pvt.

Referenced by bridge_basic_personality_alloc().

play_failsound()

static void play_failsound ( struct ast_channel *  chan )

static

Helper method to play a fail sound on a channel in a bridge.

Parameters

chan	The channel to play the fail sound to

Definition at line 1752 of file bridge_basic.c.

{
    char *sound;
 
    ast_channel_lock(chan);
    sound = ast_get_chan_features_xferfailsound(chan);
    ast_channel_unlock(chan);
 
    if (sound) {
        play_sound(chan, sound);
        ast_free(sound);
    }
}

References ast_channel_lock, ast_channel_unlock, ast_free, ast_get_chan_features_xferfailsound(), ast_bridge_channel::chan, and play_sound().

Referenced by calling_target_exit(), consulting_exit(), double_checking_exit(), and hesitant_exit().

play_sound()

static void play_sound ( struct ast_channel *  chan, const char *  sound  )

static

Helper method to play a sound on a channel in a bridge.

Parameters

chan	The channel to play the sound to
sound	The sound to play

Definition at line 1733 of file bridge_basic.c.

{
    struct ast_bridge_channel *bridge_channel;
 
    ast_channel_lock(chan);
    bridge_channel = ast_channel_get_bridge_channel(chan);
    ast_channel_unlock(chan);
 
    if (bridge_channel) {
        ast_bridge_channel_queue_playfile(bridge_channel, NULL, sound, NULL);
        ao2_ref(bridge_channel, -1);
    }
}

References ao2_ref, ast_bridge_channel_queue_playfile(), ast_channel_get_bridge_channel(), ast_channel_lock, ast_channel_unlock, ast_bridge_channel::chan, and NULL.

Referenced by complete_enter(), play_failsound(), and threeway_enter().

publish_transfer_fail()

static void publish_transfer_fail ( struct attended_transfer_properties *  props )

static

Send a stasis publication for a failed attended transfer.

Definition at line 1708 of file bridge_basic.c.

{
    struct ast_attended_transfer_message *transfer_msg;
 
    transfer_msg = ast_attended_transfer_message_create(0, props->transferer,
            props->transferee_bridge, props->transferer, props->target_bridge,
            NULL, NULL);
 
    if (!transfer_msg) {
        ast_log(LOG_ERROR, "Unable to publish failed transfer from %s\n",
                ast_channel_name(props->transferer));
        return;
    }
 
    transfer_msg->result = AST_BRIDGE_TRANSFER_FAIL;
    ast_bridge_publish_attended_transfer(transfer_msg);
    ao2_cleanup(transfer_msg);
}

References ao2_cleanup, ast_attended_transfer_message_create(), ast_bridge_publish_attended_transfer(), AST_BRIDGE_TRANSFER_FAIL, ast_channel_name(), ast_log, LOG_ERROR, NULL, ast_attended_transfer_message::result, attended_transfer_properties::target_bridge, attended_transfer_properties::transferee_bridge, and attended_transfer_properties::transferer.

Referenced by calling_target_exit(), double_checking_exit(), and hesitant_exit().

publish_transfer_success()

static void publish_transfer_success ( struct attended_transfer_properties *  props, struct ast_channel *  transferee_channel, struct ast_channel *  target_channel  )

static

Send a stasis publication for a successful attended transfer.

Definition at line 1661 of file bridge_basic.c.

{
    struct ast_attended_transfer_message *transfer_msg;
 
    transfer_msg = ast_attended_transfer_message_create(0, props->transferer,
            props->transferee_bridge, props->transferer, props->target_bridge,
            transferee_channel, target_channel);
 
    if (!transfer_msg) {
        ast_log(LOG_ERROR, "Unable to publish successful attended transfer from %s\n",
                ast_channel_name(props->transferer));
        return;
    }
 
    ast_attended_transfer_message_add_merge(transfer_msg, props->transferee_bridge);
    ast_bridge_publish_attended_transfer(transfer_msg);
    ao2_cleanup(transfer_msg);
}

References ao2_cleanup, ast_attended_transfer_message_add_merge(), ast_attended_transfer_message_create(), ast_bridge_publish_attended_transfer(), ast_channel_name(), ast_log, LOG_ERROR, attended_transfer_properties::target_bridge, attended_transfer_properties::transferee_bridge, and attended_transfer_properties::transferer.

Referenced by blond_enter(), and complete_enter().

publish_transfer_threeway()

static void publish_transfer_threeway ( struct attended_transfer_properties *  props, struct ast_channel *  transferee_channel, struct ast_channel *  target_channel  )

static

Send a stasis publication for an attended transfer that ends in a threeway call.

Definition at line 1684 of file bridge_basic.c.

{
    struct ast_attended_transfer_message *transfer_msg;
 
    transfer_msg = ast_attended_transfer_message_create(0, props->transferer,
            props->transferee_bridge, props->transferer, props->target_bridge,
            transferee_channel, target_channel);
 
    if (!transfer_msg) {
        ast_log(LOG_ERROR, "Unable to publish successful three-way transfer from %s\n",
                ast_channel_name(props->transferer));
        return;
    }
 
    ast_attended_transfer_message_add_threeway(transfer_msg, props->transferer,
            props->transferee_bridge);
    ast_bridge_publish_attended_transfer(transfer_msg);
    ao2_cleanup(transfer_msg);
}

References ao2_cleanup, ast_attended_transfer_message_add_threeway(), ast_attended_transfer_message_create(), ast_bridge_publish_attended_transfer(), ast_channel_name(), ast_log, LOG_ERROR, attended_transfer_properties::target_bridge, attended_transfer_properties::transferee_bridge, and attended_transfer_properties::transferer.

Referenced by threeway_enter().

rebridge_enter()

static int rebridge_enter ( struct attended_transfer_properties *  props )

static

Definition at line 2196 of file bridge_basic.c.

{
    bridge_move(props->transferee_bridge, props->target_bridge, props->transferer, NULL);
    unhold(props->transferer);
    return 0;
}

References bridge_move(), NULL, attended_transfer_properties::target_bridge, attended_transfer_properties::transferee_bridge, attended_transfer_properties::transferer, and unhold().

recall_callback()

static void recall_callback ( struct ast_dial *  dial )

static

Dial callback when attempting to recall the original transferer channel.

This is how we can monitor if the recall target has answered or has hung up. If one of the two is detected, then an appropriate stimulus is sent to the attended transfer monitor thread.

Definition at line 2404 of file bridge_basic.c.

{
    struct attended_transfer_properties *props = ast_dial_get_user_data(dial);
 
    switch (ast_dial_state(dial)) {
    default:
    case AST_DIAL_RESULT_INVALID:
    case AST_DIAL_RESULT_FAILED:
    case AST_DIAL_RESULT_TIMEOUT:
    case AST_DIAL_RESULT_HANGUP:
    case AST_DIAL_RESULT_UNANSWERED:
        /* Failure cases */
        stimulate_attended_transfer(props, STIMULUS_RECALL_TARGET_HANGUP);
        break;
    case AST_DIAL_RESULT_RINGING:
    case AST_DIAL_RESULT_PROGRESS:
    case AST_DIAL_RESULT_PROCEEDING:
    case AST_DIAL_RESULT_TRYING:
        /* Don't care about these cases */
        break;
    case AST_DIAL_RESULT_ANSWERED:
        /* We struck gold! */
        props->recall_target = ast_dial_answered_steal(dial);
        stimulate_attended_transfer(props, STIMULUS_RECALL_TARGET_ANSWER);
        break;
    }
}

References ast_dial_answered_steal(), ast_dial_get_user_data(), AST_DIAL_RESULT_ANSWERED, AST_DIAL_RESULT_FAILED, AST_DIAL_RESULT_HANGUP, AST_DIAL_RESULT_INVALID, AST_DIAL_RESULT_PROCEEDING, AST_DIAL_RESULT_PROGRESS, AST_DIAL_RESULT_RINGING, AST_DIAL_RESULT_TIMEOUT, AST_DIAL_RESULT_TRYING, AST_DIAL_RESULT_UNANSWERED, ast_dial_state(), attended_transfer_properties::dial, attended_transfer_properties::recall_target, stimulate_attended_transfer(), STIMULUS_RECALL_TARGET_ANSWER, and STIMULUS_RECALL_TARGET_HANGUP.

Referenced by recalling_enter().

recall_pull()

static void recall_pull ( struct ast_bridge *  self, struct ast_bridge_channel *  bridge_channel, struct attended_transfer_properties *  props  )

static

Definition at line 2953 of file bridge_basic.c.

{
    if (self == props->target_bridge) {
        /* Once we're in the recall superstate, we no longer care about this bridge */
        return;
    }
 
    if (bridge_channel->chan == props->recall_target) {
        stimulate_attended_transfer(props, STIMULUS_RECALL_TARGET_HANGUP);
        return;
    }
 
    if (self->num_channels == 0) {
        /* Empty bridge means all transferees are gone for sure */
        stimulate_attended_transfer(props, STIMULUS_TRANSFEREE_HANGUP);
        return;
    }
 
    if (self->num_channels == 1) {
        struct ast_bridge_channel *target_bridge_channel;
 
        if (!props->recall_target) {
            /* No recall target means that the pull happened on a transferee. If there's still
             * a channel left in the bridge, we don't need to send a stimulus
             */
            return;
        }
 
        ast_channel_lock(props->recall_target);
        target_bridge_channel = ast_channel_get_bridge_channel(props->recall_target);
        ast_channel_unlock(props->recall_target);
 
        if (target_bridge_channel) {
            if (AST_LIST_FIRST(&self->channels) == target_bridge_channel) {
                stimulate_attended_transfer(props, STIMULUS_TRANSFEREE_HANGUP);
            }
            ao2_ref(target_bridge_channel, -1);
        }
    }
}

References ao2_ref, ast_channel_get_bridge_channel(), ast_channel_lock, ast_channel_unlock, AST_LIST_FIRST, ast_bridge_channel::chan, ast_bridge::channels, ast_bridge::num_channels, attended_transfer_properties::recall_target, stimulate_attended_transfer(), STIMULUS_RECALL_TARGET_HANGUP, STIMULUS_TRANSFEREE_HANGUP, and attended_transfer_properties::target_bridge.

Referenced by bridge_personality_atxfer_pull().

recalling_enter()

static int recalling_enter ( struct attended_transfer_properties *  props )

static

Definition at line 2469 of file bridge_basic.c.

{
    RAII_VAR(struct ast_format_cap *, cap, ast_format_cap_alloc(AST_FORMAT_CAP_FLAG_DEFAULT), ao2_cleanup);
    struct ast_channel *recall;
 
    if (!cap) {
        return -1;
    }
 
    ast_format_cap_append(cap, ast_format_slin, 0);
 
    /* When we dial the transfer target, since we are communicating
     * with a local channel, we can place the local channel in a bridge
     * and then call out to it. When recalling the transferer, though, we
     * have to use the dialing API because the channel is not local.
     */
    props->dial = ast_dial_create();
    if (!props->dial) {
        return -1;
    }
 
    if (ast_dial_append(props->dial, props->transferer_type, props->transferer_addr, NULL)) {
        return -1;
    }
 
    if (ast_dial_prerun(props->dial, NULL, cap)) {
        return -1;
    }
 
    /*
     * Setup callid, variables, datastores, accountcode, peeraccount,
     * COLP, and CLID on the recalled transferrer.
     */
    recall = ast_dial_get_channel(props->dial, 0);
    if (!recall) {
        return -1;
    }
    ast_channel_lock_both(recall, props->transferer);
 
    ast_party_caller_copy(ast_channel_caller(recall),
        ast_channel_caller(props->transferer));
    ast_party_connected_line_copy(ast_channel_connected(recall),
        &props->original_transferer_colp);
 
    common_recall_channel_setup(recall, props->transferer);
    ast_channel_unlock(recall);
    ast_channel_unlock(props->transferer);
 
    ast_dial_set_state_callback(props->dial, recall_callback);
 
    ao2_ref(props, +1);
    ast_dial_set_user_data(props->dial, props);
 
    if (ast_dial_run(props->dial, NULL, 1) == AST_DIAL_RESULT_FAILED) {
        ao2_ref(props, -1);
        return -1;
    }
 
    bridge_ringing(props->transferee_bridge);
    return 0;
}

References ao2_cleanup, ao2_ref, ast_channel_caller(), ast_channel_connected(), ast_channel_lock_both, ast_channel_unlock, ast_dial_append(), ast_dial_create(), ast_dial_get_channel(), ast_dial_prerun(), AST_DIAL_RESULT_FAILED, ast_dial_run(), ast_dial_set_state_callback(), ast_dial_set_user_data(), ast_format_cap_alloc, ast_format_cap_append, AST_FORMAT_CAP_FLAG_DEFAULT, ast_format_slin, ast_party_caller_copy(), ast_party_connected_line_copy(), bridge_ringing(), common_recall_channel_setup(), attended_transfer_properties::dial, NULL, attended_transfer_properties::original_transferer_colp, RAII_VAR, recall_callback(), attended_transfer_properties::transferee_bridge, attended_transfer_properties::transferer, attended_transfer_properties::transferer_addr, and attended_transfer_properties::transferer_type.

recalling_exit()

static enum attended_transfer_state recalling_exit ( struct attended_transfer_properties *  props, enum attended_transfer_stimulus  stimulus  )

static

Definition at line 2531 of file bridge_basic.c.

{
    /* No matter what the outcome was, we need to kill off the dial */
    ast_dial_join(props->dial);
    ast_dial_destroy(props->dial);
    props->dial = NULL;
    /* This reference is the one we incremented for the dial state callback (recall_callback) to use */
    ao2_ref(props, -1);
 
    switch (stimulus) {
    case STIMULUS_TRANSFEREE_HANGUP:
        return TRANSFER_FAIL;
    case STIMULUS_TIMEOUT:
    case STIMULUS_RECALL_TARGET_HANGUP:
        ++props->retry_attempts;
        if (props->retry_attempts >= props->atxfercallbackretries) {
            return TRANSFER_FAIL;
        }
        if (props->atxferloopdelay) {
            return TRANSFER_WAIT_TO_RETRANSFER;
        }
        return TRANSFER_RETRANSFER;
    case STIMULUS_RECALL_TARGET_ANSWER:
        /* Setting this datastore up will allow the transferer to have all of his
         * call features set up automatically when the bridge changes back to a
         * normal personality
         */
        ast_bridge_features_ds_set(props->recall_target, &props->transferer_features);
        ast_channel_ref(props->recall_target);
        if (ast_bridge_impart(props->transferee_bridge, props->recall_target, NULL, NULL,
            AST_BRIDGE_IMPART_CHAN_INDEPENDENT)) {
            ast_hangup(props->recall_target);
            ast_channel_unref(props->recall_target);
            return TRANSFER_FAIL;
        }
        return TRANSFER_RESUME;
    case STIMULUS_NONE:
    case STIMULUS_DTMF_ATXFER_ABORT:
    case STIMULUS_DTMF_ATXFER_COMPLETE:
    case STIMULUS_DTMF_ATXFER_THREEWAY:
    case STIMULUS_DTMF_ATXFER_SWAP:
    case STIMULUS_TRANSFER_TARGET_HANGUP:
    case STIMULUS_TRANSFER_TARGET_ANSWER:
    case STIMULUS_TRANSFERER_HANGUP:
    default:
        ast_log(LOG_WARNING, "Unexpected stimulus '%s' received in attended transfer state '%s'\n",
                stimulus_strs[stimulus], state_properties[props->state].state_name);
        return props->state;
    }
}

References ao2_ref, ast_bridge_features_ds_set(), ast_bridge_impart(), AST_BRIDGE_IMPART_CHAN_INDEPENDENT, ast_channel_ref, ast_channel_unref, ast_dial_destroy(), ast_dial_join(), ast_hangup(), ast_log, attended_transfer_properties::atxfercallbackretries, attended_transfer_properties::atxferloopdelay, attended_transfer_properties::dial, LOG_WARNING, NULL, attended_transfer_properties::recall_target, attended_transfer_properties::retry_attempts, attended_transfer_properties::state, attended_transfer_state_properties::state_name, state_properties, STIMULUS_DTMF_ATXFER_ABORT, STIMULUS_DTMF_ATXFER_COMPLETE, STIMULUS_DTMF_ATXFER_SWAP, STIMULUS_DTMF_ATXFER_THREEWAY, STIMULUS_NONE, STIMULUS_RECALL_TARGET_ANSWER, STIMULUS_RECALL_TARGET_HANGUP, stimulus_strs, STIMULUS_TIMEOUT, STIMULUS_TRANSFER_TARGET_ANSWER, STIMULUS_TRANSFER_TARGET_HANGUP, STIMULUS_TRANSFEREE_HANGUP, STIMULUS_TRANSFERER_HANGUP, TRANSFER_FAIL, TRANSFER_RESUME, TRANSFER_RETRANSFER, TRANSFER_WAIT_TO_RETRANSFER, attended_transfer_properties::transferee_bridge, and attended_transfer_properties::transferer_features.

remove_attended_transfer_stimulus()

static void remove_attended_transfer_stimulus ( struct attended_transfer_properties *  props, enum attended_transfer_stimulus  stimulus  )

static

Definition at line 1566 of file bridge_basic.c.

{
    struct stimulus_list *list;
 
    ao2_lock(props);
    AST_LIST_TRAVERSE_SAFE_BEGIN(&props->stimulus_queue, list, next) {
        if (list->stimulus == stimulus) {
            AST_LIST_REMOVE_CURRENT(next);
            ast_free(list);
            break;
        }
    }
    AST_LIST_TRAVERSE_SAFE_END;
    ao2_unlock(props);
}

References ao2_lock, ao2_unlock, ast_free, AST_LIST_REMOVE_CURRENT, AST_LIST_TRAVERSE_SAFE_BEGIN, AST_LIST_TRAVERSE_SAFE_END, stimulus_list::next, stimulus_list::stimulus, and attended_transfer_properties::stimulus_queue.

Referenced by blond_nonfinal_exit().

remove_hooks_on_personality_change()

static void remove_hooks_on_personality_change ( struct ast_bridge *  bridge )

static

Remove appropriate hooks when basic bridge personality changes.

Hooks that have the AST_BRIDGE_HOOK_REMOVE_ON_PERSONALITY_CHANGE flag set will be removed from all bridge channels in the bridge.

Parameters

bridge

Basic bridge undergoing personality change

Definition at line 719 of file bridge_basic.c.

{
    struct ast_bridge_channel *iter;
 
    AST_LIST_TRAVERSE(&bridge->channels, iter, entry) {
        SCOPED_LOCK(lock, iter, ast_bridge_channel_lock, ast_bridge_channel_unlock);
        ast_bridge_features_remove(iter->features, AST_BRIDGE_HOOK_REMOVE_ON_PERSONALITY_CHANGE);
    }
}

References ast_bridge_channel_lock, ast_bridge_channel_unlock, ast_bridge_features_remove(), AST_BRIDGE_HOOK_REMOVE_ON_PERSONALITY_CHANGE, AST_LIST_TRAVERSE, ast_bridge_channel::bridge, ast_bridge::channels, ast_bridge_channel::features, lock, and SCOPED_LOCK.

Referenced by bridge_basic_change_personality().

resume_enter()

static int resume_enter ( struct attended_transfer_properties *  props )

static

Definition at line 2203 of file bridge_basic.c.

{
    return 0;
}

retransfer_enter()

static int retransfer_enter ( struct attended_transfer_properties *  props )

static

Definition at line 2617 of file bridge_basic.c.

{
    RAII_VAR(struct ast_format_cap *, cap, ast_format_cap_alloc(AST_FORMAT_CAP_FLAG_DEFAULT), ao2_cleanup);
    char destination[AST_MAX_EXTENSION + AST_MAX_CONTEXT + 2];
    int cause;
 
    if (!cap) {
        return -1;
    }
 
    snprintf(destination, sizeof(destination), "%s@%s", props->exten, props->context);
 
    ast_format_cap_append(cap, ast_format_slin, 0);
 
    /* Get a channel that is the destination we wish to call */
    props->recall_target = ast_request("Local", cap, NULL, NULL, destination, &cause);
    if (!props->recall_target) {
        ast_log(LOG_ERROR, "Unable to request outbound channel for recall target\n");
        return -1;
    }
 
    if (attach_framehook(props, props->recall_target)) {
        ast_log(LOG_ERROR, "Unable to attach framehook to recall target\n");
        ast_hangup(props->recall_target);
        props->recall_target = NULL;
        return -1;
    }
 
    /*
     * Setup callid, variables, datastores, accountcode, peeraccount,
     * and COLP on the recalled transfer target.
     */
    ast_channel_lock_both(props->recall_target, props->transferer);
 
    ast_party_connected_line_copy(ast_channel_connected(props->recall_target),
        &props->original_transferer_colp);
    ast_party_id_reset(&ast_channel_connected(props->recall_target)->priv);
 
    common_recall_channel_setup(props->recall_target, props->transferer);
    ast_channel_unlock(props->recall_target);
    ast_channel_unlock(props->transferer);
 
    if (ast_call(props->recall_target, destination, 0)) {
        ast_log(LOG_ERROR, "Unable to place outbound call to recall target\n");
        ast_hangup(props->recall_target);
        props->recall_target = NULL;
        return -1;
    }
 
    ast_channel_ref(props->recall_target);
    if (ast_bridge_impart(props->transferee_bridge, props->recall_target, NULL, NULL,
        AST_BRIDGE_IMPART_CHAN_INDEPENDENT)) {
        ast_log(LOG_ERROR, "Unable to place recall target into bridge\n");
        ast_hangup(props->recall_target);
        ast_channel_unref(props->recall_target);
        return -1;
    }
 
    return 0;
}

References ao2_cleanup, ast_bridge_impart(), AST_BRIDGE_IMPART_CHAN_INDEPENDENT, ast_call(), ast_channel_connected(), ast_channel_lock_both, ast_channel_ref, ast_channel_unlock, ast_channel_unref, ast_format_cap_alloc, ast_format_cap_append, AST_FORMAT_CAP_FLAG_DEFAULT, ast_format_slin, ast_hangup(), ast_log, AST_MAX_CONTEXT, AST_MAX_EXTENSION, ast_party_connected_line_copy(), ast_party_id_reset(), ast_request(), attach_framehook(), common_recall_channel_setup(), attended_transfer_properties::context, attended_transfer_properties::exten, LOG_ERROR, NULL, attended_transfer_properties::original_transferer_colp, ast_party_connected_line::priv, RAII_VAR, attended_transfer_properties::recall_target, attended_transfer_properties::transferee_bridge, and attended_transfer_properties::transferer.

retransfer_exit()

static enum attended_transfer_state retransfer_exit ( struct attended_transfer_properties *  props, enum attended_transfer_stimulus  stimulus  )

static

Definition at line 2678 of file bridge_basic.c.

{
    switch (stimulus) {
    case STIMULUS_TRANSFEREE_HANGUP:
        return TRANSFER_FAIL;
    case STIMULUS_TIMEOUT:
        ast_softhangup(props->recall_target, AST_SOFTHANGUP_EXPLICIT);
    case STIMULUS_RECALL_TARGET_HANGUP:
        props->recall_target = ast_channel_unref(props->recall_target);
        if (props->atxferloopdelay) {
            return TRANSFER_WAIT_TO_RECALL;
        }
        return TRANSFER_RECALLING;
    case STIMULUS_RECALL_TARGET_ANSWER:
        return TRANSFER_RESUME;
    case STIMULUS_NONE:
    case STIMULUS_DTMF_ATXFER_ABORT:
    case STIMULUS_DTMF_ATXFER_COMPLETE:
    case STIMULUS_DTMF_ATXFER_THREEWAY:
    case STIMULUS_DTMF_ATXFER_SWAP:
    case STIMULUS_TRANSFER_TARGET_HANGUP:
    case STIMULUS_TRANSFER_TARGET_ANSWER:
    case STIMULUS_TRANSFERER_HANGUP:
    default:
        ast_log(LOG_WARNING, "Unexpected stimulus '%s' received in attended transfer state '%s'\n",
                stimulus_strs[stimulus], state_properties[props->state].state_name);
        return props->state;
    }
}

References ast_channel_unref, ast_log, ast_softhangup(), AST_SOFTHANGUP_EXPLICIT, attended_transfer_properties::atxferloopdelay, LOG_WARNING, attended_transfer_properties::recall_target, attended_transfer_properties::state, attended_transfer_state_properties::state_name, state_properties, STIMULUS_DTMF_ATXFER_ABORT, STIMULUS_DTMF_ATXFER_COMPLETE, STIMULUS_DTMF_ATXFER_SWAP, STIMULUS_DTMF_ATXFER_THREEWAY, STIMULUS_NONE, STIMULUS_RECALL_TARGET_ANSWER, STIMULUS_RECALL_TARGET_HANGUP, stimulus_strs, STIMULUS_TIMEOUT, STIMULUS_TRANSFER_TARGET_ANSWER, STIMULUS_TRANSFER_TARGET_HANGUP, STIMULUS_TRANSFEREE_HANGUP, STIMULUS_TRANSFERER_HANGUP, TRANSFER_FAIL, TRANSFER_RECALLING, TRANSFER_RESUME, and TRANSFER_WAIT_TO_RECALL.

ringing()

static void ringing ( struct ast_channel *  chan )

static

Helper method to send a ringing indication to a channel in a bridge.

Definition at line 1830 of file bridge_basic.c.

{
    struct ast_bridge_channel *bridge_channel;
 
    ast_channel_lock(chan);
    bridge_channel = ast_channel_get_bridge_channel(chan);
    ast_channel_unlock(chan);
 
    if (bridge_channel) {
        ast_bridge_channel_write_control_data(bridge_channel, AST_CONTROL_RINGING, NULL, 0);
        ao2_ref(bridge_channel, -1);
    }
}

References ao2_ref, ast_bridge_channel_write_control_data(), ast_channel_get_bridge_channel(), ast_channel_lock, ast_channel_unlock, AST_CONTROL_RINGING, ast_bridge_channel::chan, and NULL.

Referenced by blond_enter(), bridge_ringing(), queue_exec(), say_periodic_announcement(), say_position(), try_calling(), and wait_our_turn().

set_feature_flag_from_char()

static int set_feature_flag_from_char ( struct ast_flags *  feature_flags, char  feature  )

static

Definition at line 98 of file bridge_basic.c.

{
    switch (feature) {
    case 'T':
        ast_set_flag(feature_flags, AST_FEATURE_REDIRECT);
        return 0;
    case 'K':
        ast_set_flag(feature_flags, AST_FEATURE_PARKCALL);
        return 0;
    case 'H':
        ast_set_flag(feature_flags, AST_FEATURE_DISCONNECT);
        return 0;
    case 'W':
        ast_set_flag(feature_flags, AST_FEATURE_AUTOMON);
        return 0;
    case 'X':
        ast_set_flag(feature_flags, AST_FEATURE_AUTOMIXMON);
        return 0;
    default:
        return -1;
    }
}

References AST_FEATURE_AUTOMIXMON, AST_FEATURE_AUTOMON, AST_FEATURE_DISCONNECT, AST_FEATURE_PARKCALL, AST_FEATURE_REDIRECT, and ast_set_flag.

Referenced by build_dtmf_features().

setup_bridge_features_builtin()

static int setup_bridge_features_builtin ( struct ast_bridge_features *  features, struct ast_channel *  chan  )

static

Definition at line 400 of file bridge_basic.c.

{
    struct ast_flags *flags;
    int res;
 
    ast_channel_lock(chan);
    flags = ast_bridge_features_ds_get(chan);
    ast_channel_unlock(chan);
    if (!flags) {
        return 0;
    }
 
    res = 0;
    res |= builtin_features_helper(features, chan, flags, AST_FEATURE_REDIRECT, "blindxfer", AST_BRIDGE_BUILTIN_BLINDTRANSFER);
    res |= builtin_features_helper(features, chan, flags, AST_FEATURE_REDIRECT, "atxfer", AST_BRIDGE_BUILTIN_ATTENDEDTRANSFER);
    res |= builtin_features_helper(features, chan, flags, AST_FEATURE_DISCONNECT, "disconnect", AST_BRIDGE_BUILTIN_HANGUP);
    res |= builtin_features_helper(features, chan, flags, AST_FEATURE_PARKCALL, "parkcall", AST_BRIDGE_BUILTIN_PARKCALL);
    res |= builtin_features_helper(features, chan, flags, AST_FEATURE_AUTOMIXMON, "automixmon", AST_BRIDGE_BUILTIN_AUTOMIXMON);
 
    return res ? -1 : 0;
}

References AST_BRIDGE_BUILTIN_ATTENDEDTRANSFER, AST_BRIDGE_BUILTIN_AUTOMIXMON, AST_BRIDGE_BUILTIN_BLINDTRANSFER, AST_BRIDGE_BUILTIN_HANGUP, AST_BRIDGE_BUILTIN_PARKCALL, ast_bridge_features_ds_get(), ast_channel_lock, ast_channel_unlock, AST_FEATURE_AUTOMIXMON, AST_FEATURE_DISCONNECT, AST_FEATURE_PARKCALL, AST_FEATURE_REDIRECT, builtin_features_helper(), and ast_flags::flags.

Referenced by bridge_basic_setup_features().

setup_bridge_features_dynamic()

static int setup_bridge_features_dynamic ( struct ast_bridge_features *  features, struct ast_channel *  chan  )

static

Definition at line 604 of file bridge_basic.c.

{
    struct ao2_container *applicationmap;
    int res = 0;
 
    ast_channel_lock(chan);
    applicationmap = ast_get_chan_applicationmap(chan);
    ast_channel_unlock(chan);
    if (applicationmap) {
        ao2_callback_data(applicationmap, 0, setup_dynamic_feature, features, &res);
        ao2_ref(applicationmap, -1);
    }
 
    return res;
}

References ao2_callback_data, ao2_ref, ast_channel_lock, ast_channel_unlock, ast_get_chan_applicationmap(), and setup_dynamic_feature().

Referenced by bridge_basic_setup_features().

setup_dynamic_feature()

static int setup_dynamic_feature ( void *  obj, void *  arg, void *  data, int  flags  )

static

Definition at line 580 of file bridge_basic.c.

{
    struct ast_applicationmap_item *item = obj;
    struct ast_bridge_features *features = arg;
    int *res = data;
 
    *res |= dynamic_dtmf_hook_add(features,
        item->activate_on_self ? AST_FEATURE_FLAG_ONSELF : AST_FEATURE_FLAG_ONPEER,
        item->dtmf, item->name, item->app, item->app_data, item->moh_class);
 
    return 0;
}

References AST_FEATURE_FLAG_ONPEER, AST_FEATURE_FLAG_ONSELF, dynamic_dtmf_hook_add(), item, and aco_type::name.

Referenced by setup_bridge_features_dynamic().

stimulate_attended_transfer()

static void stimulate_attended_transfer ( struct attended_transfer_properties *  props, enum attended_transfer_stimulus  stimulus  )

static

Definition at line 1548 of file bridge_basic.c.

{
    struct stimulus_list *list;
 
    list = ast_calloc(1, sizeof(*list));
    if (!list) {
        ast_log(LOG_ERROR, "Unable to push event to attended transfer queue. Expect transfer to fail\n");
        return;
    }
 
    list->stimulus = stimulus;
    ao2_lock(props);
    AST_LIST_INSERT_TAIL(&props->stimulus_queue, list, next);
    ast_cond_signal(&props->cond);
    ao2_unlock(props);
}

References ao2_lock, ao2_unlock, ast_calloc, ast_cond_signal, AST_LIST_INSERT_TAIL, ast_log, attended_transfer_properties::cond, LOG_ERROR, stimulus_list::next, stimulus_list::stimulus, and attended_transfer_properties::stimulus_queue.

Referenced by atxfer_abort(), atxfer_complete(), atxfer_swap(), atxfer_threeway(), atxfer_transferer_hangup(), recall_callback(), recall_pull(), transfer_pull(), and transfer_target_framehook_cb().

stream_failsound()

static void stream_failsound ( struct ast_channel *  chan )

static

Helper method to stream a fail sound on a channel.

Parameters

chan	The channel to stream the fail sound to

Definition at line 1771 of file bridge_basic.c.

{
    char *sound;
 
    ast_channel_lock(chan);
    sound = ast_get_chan_features_xferfailsound(chan);
    ast_channel_unlock(chan);
 
    if (sound) {
        ast_stream_and_wait(chan, sound, AST_DIGIT_NONE);
        ast_free(sound);
    }
}

References ast_channel_lock, ast_channel_unlock, AST_DIGIT_NONE, ast_free, ast_get_chan_features_xferfailsound(), ast_stream_and_wait(), and ast_bridge_channel::chan.

Referenced by feature_attended_transfer().

threeway_enter()

static int threeway_enter ( struct attended_transfer_properties *  props )

static

Definition at line 2208 of file bridge_basic.c.

{
    struct ast_channel *transferee_channel;
    struct ast_channel *target_channel;
 
    get_transfer_parties(props->transferer, props->transferee_bridge, props->target_bridge,
            &transferee_channel, &target_channel);
    bridge_merge(props->transferee_bridge, props->target_bridge, NULL, 0);
    play_sound(props->transfer_target, props->xfersound);
    play_sound(props->transferer, props->xfersound);
    publish_transfer_threeway(props, transferee_channel, target_channel);
 
    ast_channel_cleanup(transferee_channel);
    ast_channel_cleanup(target_channel);
    return 0;
}

References ast_channel_cleanup, bridge_merge(), get_transfer_parties(), NULL, play_sound(), publish_transfer_threeway(), attended_transfer_properties::target_bridge, attended_transfer_properties::transfer_target, attended_transfer_properties::transferee_bridge, attended_transfer_properties::transferer, and attended_transfer_properties::xfersound.

transfer_pull()

static void transfer_pull ( struct ast_bridge *  self, struct ast_bridge_channel *  bridge_channel, struct attended_transfer_properties *  props  )

static

Definition at line 2915 of file bridge_basic.c.

{
    if (self->num_channels > 1 || bridge_channel->state == BRIDGE_CHANNEL_STATE_WAIT) {
        return;
    }
 
    if (self->num_channels == 1) {
        struct ast_bridge_channel *transferer_bridge_channel;
        int not_transferer;
 
        ast_channel_lock(props->transferer);
        transferer_bridge_channel = ast_channel_get_bridge_channel(props->transferer);
        ast_channel_unlock(props->transferer);
 
        if (!transferer_bridge_channel) {
            return;
        }
 
        not_transferer = AST_LIST_FIRST(&self->channels) != transferer_bridge_channel;
        ao2_ref(transferer_bridge_channel, -1);
        if (not_transferer) {
            return;
        }
    }
 
    /* Reaching this point means that either
     * 1) The bridge has no channels in it
     * 2) The bridge has one channel, and it's the transferer
     * In either case, it indicates that the non-transferer parties
     * are no longer in the bridge.
     */
    if (self == props->transferee_bridge) {
        stimulate_attended_transfer(props, STIMULUS_TRANSFEREE_HANGUP);
    } else {
        stimulate_attended_transfer(props, STIMULUS_TRANSFER_TARGET_HANGUP);
    }
}

References ao2_ref, ast_channel_get_bridge_channel(), ast_channel_lock, ast_channel_unlock, AST_LIST_FIRST, BRIDGE_CHANNEL_STATE_WAIT, ast_bridge::channels, ast_bridge::num_channels, ast_bridge_channel::state, stimulate_attended_transfer(), STIMULUS_TRANSFER_TARGET_HANGUP, STIMULUS_TRANSFEREE_HANGUP, attended_transfer_properties::transferee_bridge, and attended_transfer_properties::transferer.

Referenced by bridge_personality_atxfer_pull().

transfer_target_framehook_cb()

static struct ast_frame * transfer_target_framehook_cb ( struct ast_channel *  chan, struct ast_frame *  frame, enum ast_framehook_event  event, void *  data  )

static

Frame hook for transfer target channel.

This is used to determine if the transfer target or recall target has answered the outgoing call.

When an answer is detected, a stimulus is sent to the attended transfer monitor thread to indicate that the transfer target or recall target has answered.

Parameters

chan	The channel the framehook is attached to.
frame	The frame being read or written.
event	What is being done with the frame.
data	The attended transfer properties.

Definition at line 2834 of file bridge_basic.c.

{
    struct attended_transfer_properties *props = data;
 
    if (event == AST_FRAMEHOOK_EVENT_READ &&
            frame && frame->frametype == AST_FRAME_CONTROL &&
            frame->subclass.integer == AST_CONTROL_ANSWER &&
            !ast_check_hangup(chan)) {
 
        ast_debug(1, "Detected an answer for recall attempt on attended transfer %p\n", props);
        if (props->superstate == SUPERSTATE_TRANSFER) {
            stimulate_attended_transfer(props, STIMULUS_TRANSFER_TARGET_ANSWER);
        } else {
            stimulate_attended_transfer(props, STIMULUS_RECALL_TARGET_ANSWER);
        }
        ast_framehook_detach(chan, props->target_framehook_id);
        props->target_framehook_id = -1;
    }
 
    return frame;
}

References ast_check_hangup(), AST_CONTROL_ANSWER, ast_debug, AST_FRAME_CONTROL, ast_framehook_detach(), AST_FRAMEHOOK_EVENT_READ, ast_frame::frametype, ast_frame_subclass::integer, stimulate_attended_transfer(), STIMULUS_RECALL_TARGET_ANSWER, STIMULUS_TRANSFER_TARGET_ANSWER, ast_frame::subclass, attended_transfer_properties::superstate, SUPERSTATE_TRANSFER, and attended_transfer_properties::target_framehook_id.

Referenced by attach_framehook().

transfer_target_framehook_consume()

static int transfer_target_framehook_consume ( void *  data, enum ast_frame_type  type  )

static

Callback function which informs upstream if we are consuming a frame of a specific type.

Definition at line 2858 of file bridge_basic.c.

{
    return (type == AST_FRAME_CONTROL ? 1 : 0);
}

References AST_FRAME_CONTROL, and type.

Referenced by attach_framehook().

transfer_target_framehook_destroy_cb()

static void transfer_target_framehook_destroy_cb ( void *  data )

static

Definition at line 2863 of file bridge_basic.c.

{
    struct attended_transfer_properties *props = data;
    ao2_cleanup(props);
}

References ao2_cleanup.

Referenced by attach_framehook().

unhold()

static void unhold ( struct ast_channel *  chan )

static

Helper method to take a channel in a bridge off hold.

Definition at line 1809 of file bridge_basic.c.

{
    struct ast_bridge_channel *bridge_channel;
 
    if (!chan) {
        return;
    }
 
    ast_channel_lock(chan);
    bridge_channel = ast_channel_get_bridge_channel(chan);
    ast_channel_unlock(chan);
 
    if (bridge_channel) {
        ast_bridge_channel_write_unhold(bridge_channel);
        ao2_ref(bridge_channel, -1);
    }
}

References ao2_ref, ast_bridge_channel_write_unhold(), ast_channel_get_bridge_channel(), ast_channel_lock, ast_channel_unlock, and ast_bridge_channel::chan.

Referenced by bridge_unhold(), consulting_exit(), double_checking_exit(), hesitant_enter(), and rebridge_enter().

wait_for_stimulus()

static enum attended_transfer_stimulus wait_for_stimulus ( struct attended_transfer_properties *  props )

static

Definition at line 3009 of file bridge_basic.c.

{
    enum attended_transfer_stimulus stimulus;
    struct stimulus_list *list;
    SCOPED_MUTEX(lock, ao2_object_get_lockaddr(props));
 
    while (!(list = AST_LIST_REMOVE_HEAD(&props->stimulus_queue, next))) {
        if (!(state_properties[props->state].flags & TRANSFER_STATE_FLAG_TIMED)) {
            ast_cond_wait(&props->cond, lock);
        } else {
            struct timeval relative_timeout = { 0, };
            struct timeval absolute_timeout;
            struct timespec timeout_arg;
 
            if (state_properties[props->state].flags & TRANSFER_STATE_FLAG_TIMER_RESET) {
                props->start = ast_tvnow();
            }
 
            if (state_properties[props->state].flags & TRANSFER_STATE_FLAG_TIMER_LOOP_DELAY) {
                relative_timeout.tv_sec = props->atxferloopdelay;
            } else {
                /* Implied TRANSFER_STATE_FLAG_TIMER_ATXFER_NO_ANSWER */
                relative_timeout.tv_sec = props->atxfernoanswertimeout;
            }
 
            absolute_timeout = ast_tvadd(props->start, relative_timeout);
            timeout_arg.tv_sec = absolute_timeout.tv_sec;
            timeout_arg.tv_nsec = absolute_timeout.tv_usec * 1000;
 
            if (ast_cond_timedwait(&props->cond, lock, &timeout_arg) == ETIMEDOUT) {
                return STIMULUS_TIMEOUT;
            }
        }
    }
    stimulus = list->stimulus;
    ast_free(list);
    return stimulus;
}

References ao2_object_get_lockaddr(), ast_cond_timedwait, ast_cond_wait, ast_free, AST_LIST_REMOVE_HEAD, ast_tvadd(), ast_tvnow(), attended_transfer_properties::atxferloopdelay, attended_transfer_properties::atxfernoanswertimeout, attended_transfer_properties::cond, attended_transfer_state_properties::flags, lock, stimulus_list::next, SCOPED_MUTEX, attended_transfer_properties::start, attended_transfer_properties::state, state_properties, stimulus_list::stimulus, attended_transfer_properties::stimulus_queue, STIMULUS_TIMEOUT, TRANSFER_STATE_FLAG_TIMED, TRANSFER_STATE_FLAG_TIMER_LOOP_DELAY, and TRANSFER_STATE_FLAG_TIMER_RESET.

Referenced by attended_transfer_monitor_thread().

wait_to_recall_enter()

static int wait_to_recall_enter ( struct attended_transfer_properties *  props )

static

Definition at line 2709 of file bridge_basic.c.

{
    bridge_hold(props->transferee_bridge);
    return 0;
}

References bridge_hold(), and attended_transfer_properties::transferee_bridge.

wait_to_recall_exit()

static enum attended_transfer_state wait_to_recall_exit ( struct attended_transfer_properties *  props, enum attended_transfer_stimulus  stimulus  )

static

Definition at line 2715 of file bridge_basic.c.

{
    bridge_unhold(props->transferee_bridge);
    switch (stimulus) {
    case STIMULUS_TRANSFEREE_HANGUP:
        return TRANSFER_FAIL;
    case STIMULUS_TIMEOUT:
        return TRANSFER_RECALLING;
    case STIMULUS_NONE:
    case STIMULUS_DTMF_ATXFER_ABORT:
    case STIMULUS_DTMF_ATXFER_COMPLETE:
    case STIMULUS_DTMF_ATXFER_THREEWAY:
    case STIMULUS_DTMF_ATXFER_SWAP:
    case STIMULUS_TRANSFER_TARGET_HANGUP:
    case STIMULUS_TRANSFER_TARGET_ANSWER:
    case STIMULUS_TRANSFERER_HANGUP:
    case STIMULUS_RECALL_TARGET_HANGUP:
    case STIMULUS_RECALL_TARGET_ANSWER:
    default:
        ast_log(LOG_WARNING, "Unexpected stimulus '%s' received in attended transfer state '%s'\n",
                stimulus_strs[stimulus], state_properties[props->state].state_name);
        return props->state;
    }
}

References ast_log, bridge_unhold(), LOG_WARNING, attended_transfer_properties::state, attended_transfer_state_properties::state_name, state_properties, STIMULUS_DTMF_ATXFER_ABORT, STIMULUS_DTMF_ATXFER_COMPLETE, STIMULUS_DTMF_ATXFER_SWAP, STIMULUS_DTMF_ATXFER_THREEWAY, STIMULUS_NONE, STIMULUS_RECALL_TARGET_ANSWER, STIMULUS_RECALL_TARGET_HANGUP, stimulus_strs, STIMULUS_TIMEOUT, STIMULUS_TRANSFER_TARGET_ANSWER, STIMULUS_TRANSFER_TARGET_HANGUP, STIMULUS_TRANSFEREE_HANGUP, STIMULUS_TRANSFERER_HANGUP, TRANSFER_FAIL, TRANSFER_RECALLING, and attended_transfer_properties::transferee_bridge.

wait_to_retransfer_enter()

static int wait_to_retransfer_enter ( struct attended_transfer_properties *  props )

static

Definition at line 2583 of file bridge_basic.c.

{
    bridge_hold(props->transferee_bridge);
    return 0;
}

References bridge_hold(), and attended_transfer_properties::transferee_bridge.

wait_to_retransfer_exit()

static enum attended_transfer_state wait_to_retransfer_exit ( struct attended_transfer_properties *  props, enum attended_transfer_stimulus  stimulus  )

static

Definition at line 2589 of file bridge_basic.c.

{
    bridge_unhold(props->transferee_bridge);
    switch (stimulus) {
    case STIMULUS_TRANSFEREE_HANGUP:
        return TRANSFER_FAIL;
    case STIMULUS_TIMEOUT:
        return TRANSFER_RETRANSFER;
    case STIMULUS_NONE:
    case STIMULUS_DTMF_ATXFER_ABORT:
    case STIMULUS_DTMF_ATXFER_COMPLETE:
    case STIMULUS_DTMF_ATXFER_THREEWAY:
    case STIMULUS_DTMF_ATXFER_SWAP:
    case STIMULUS_TRANSFER_TARGET_HANGUP:
    case STIMULUS_TRANSFER_TARGET_ANSWER:
    case STIMULUS_TRANSFERER_HANGUP:
    case STIMULUS_RECALL_TARGET_HANGUP:
    case STIMULUS_RECALL_TARGET_ANSWER:
    default:
        ast_log(LOG_WARNING, "Unexpected stimulus '%s' received in attended transfer state '%s'\n",
                stimulus_strs[stimulus], state_properties[props->state].state_name);
        return props->state;
    }
}

References ast_log, bridge_unhold(), LOG_WARNING, attended_transfer_properties::state, attended_transfer_state_properties::state_name, state_properties, STIMULUS_DTMF_ATXFER_ABORT, STIMULUS_DTMF_ATXFER_COMPLETE, STIMULUS_DTMF_ATXFER_SWAP, STIMULUS_DTMF_ATXFER_THREEWAY, STIMULUS_NONE, STIMULUS_RECALL_TARGET_ANSWER, STIMULUS_RECALL_TARGET_HANGUP, stimulus_strs, STIMULUS_TIMEOUT, STIMULUS_TRANSFER_TARGET_ANSWER, STIMULUS_TRANSFER_TARGET_HANGUP, STIMULUS_TRANSFEREE_HANGUP, STIMULUS_TRANSFERER_HANGUP, TRANSFER_FAIL, TRANSFER_RETRANSFER, and attended_transfer_properties::transferee_bridge.

Variable Documentation

ast_bridge_basic_v_table

struct ast_bridge_methods ast_bridge_basic_v_table

Bridge basic class virtual method table.

Definition at line 3564 of file bridge_basic.c.

Referenced by ast_bridge_basic_new(), and ast_bridging_init_basic().

dtmf_features_info

const struct ast_datastore_info dtmf_features_info

static

Initial value:

= {
    .type = "bridge-dtmf-features",
    .destroy = ast_free_ptr,
}

Definition at line 82 of file bridge_basic.c.

Referenced by ast_bridge_features_ds_get(), and bridge_features_ds_set_full().

personality_atxfer_v_table

struct ast_bridge_methods personality_atxfer_v_table

Definition at line 3566 of file bridge_basic.c.

Referenced by ast_bridging_init_basic(), and init_details().

personality_normal_v_table

struct ast_bridge_methods personality_normal_v_table

Definition at line 3565 of file bridge_basic.c.

Referenced by ast_bridging_init_basic(), and init_details().

state_properties

const struct attended_transfer_state_properties state_properties[]

static

Definition at line 2031 of file bridge_basic.c.

Referenced by attended_transfer_monitor_thread(), blond_nonfinal_exit(), calling_target_exit(), consulting_exit(), double_checking_exit(), hesitant_exit(), recalling_exit(), retransfer_exit(), wait_for_stimulus(), wait_to_recall_exit(), and wait_to_retransfer_exit().

stimulus_strs

const char* stimulus_strs[]

String representations of the various stimuli.

Used for debugging purposes

Definition at line 1267 of file bridge_basic.c.

Referenced by attended_transfer_monitor_thread(), blond_nonfinal_exit(), calling_target_exit(), consulting_exit(), double_checking_exit(), hesitant_exit(), recalling_exit(), retransfer_exit(), wait_to_recall_exit(), and wait_to_retransfer_exit().