From d91dc6d1a8a6e364d9edd6738c20ac5b8545db97 Mon Sep 17 00:00:00 2001
From: Matthew Jordan <mjordan@digium.com>
Date: Wed, 24 Jul 2013 15:38:18 +0000
Subject: [PATCH] Perform the initial renaming of the Bridging API
This patch does the following:
* It pulls out bridge_channel and puts it into its own translation unit
* It adds public and protected headers for bridging_channel. Protected
functions are appropriate only for the Bridging API and sub-classes of a
bridge.
(issue ASTERISK-22130)
git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@395253 65c4cc65-6c06-0410-ace0-fbb531ad65f3
---
apps/app_agent_pool.c | 21 +-
bridges/bridge_builtin_features.c | 2 +-
bridges/bridge_builtin_interval_features.c | 2 +-
include/asterisk/bridging.h | 693 +---
include/asterisk/bridging_channel.h | 576 +++
include/asterisk/bridging_channel_internal.h | 156 +
include/asterisk/bridging_internal.h | 129 +-
include/asterisk/bridging_technology.h | 16 +
include/asterisk/channel.h | 12 +
include/asterisk/features.h | 14 +-
main/bridging.c | 3311 ++++--------------
main/bridging_basic.c | 25 +-
main/bridging_channel.c | 1838 ++++++++++
main/channel.c | 23 +-
main/features.c | 21 -
res/parking/parking_bridge.c | 11 +-
res/parking/parking_bridge_features.c | 3 +
17 files changed, 3565 insertions(+), 3288 deletions(-)
create mode 100644 include/asterisk/bridging_channel.h
create mode 100644 include/asterisk/bridging_channel_internal.h
create mode 100644 main/bridging_channel.c
diff --git a/apps/app_agent_pool.c b/apps/app_agent_pool.c
index 92209e1eb2..fb73d869fb 100644
--- a/apps/app_agent_pool.c
+++ b/apps/app_agent_pool.c
@@ -41,6 +41,7 @@ ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
#include "asterisk/module.h"
#include "asterisk/channel.h"
#include "asterisk/bridging.h"
+#include "asterisk/bridging_internal.h"
#include "asterisk/bridging_basic.h"
#include "asterisk/config_options.h"
#include "asterisk/features_config.h"
@@ -1054,7 +1055,7 @@ static void agent_connect_caller(struct ast_bridge_channel *bridge_channel, stru
if (!caller_bridge) {
/* Reset agent. */
- ast_bridge_change_state(bridge_channel, AST_BRIDGE_CHANNEL_STATE_END);
+ ast_bridge_channel_leave_bridge(bridge_channel);
return;
}
res = ast_bridge_move(caller_bridge, bridge_channel->bridge, bridge_channel->chan,
@@ -1062,7 +1063,7 @@ static void agent_connect_caller(struct ast_bridge_channel *bridge_channel, stru
if (res) {
/* Reset agent. */
ast_bridge_destroy(caller_bridge);
- ast_bridge_change_state(bridge_channel, AST_BRIDGE_CHANNEL_STATE_END);
+ ast_bridge_channel_leave_bridge(bridge_channel);
return;
}
ast_bridge_channel_write_control_data(bridge_channel, AST_CONTROL_ANSWER, NULL, 0);
@@ -1158,13 +1159,13 @@ static int bridge_agent_hold_heartbeat(struct ast_bridge *bridge, struct ast_bri
if (deferred_logoff) {
ast_debug(1, "Agent %s: Deferred logoff.\n", agent->username);
- ast_bridge_change_state(bridge_channel, AST_BRIDGE_CHANNEL_STATE_END);
+ ast_bridge_channel_leave_bridge(bridge_channel);
} else if (probation_timedout) {
ast_debug(1, "Agent %s: Login complete.\n", agent->username);
agent_devstate_changed(agent->username);
} else if (ack_timedout) {
ast_debug(1, "Agent %s: Ack call timeout.\n", agent->username);
- ast_bridge_change_state(bridge_channel, AST_BRIDGE_CHANNEL_STATE_END);
+ ast_bridge_channel_leave_bridge(bridge_channel);
} else if (wrapup_timedout) {
ast_debug(1, "Agent %s: Wrapup timeout. Ready for new call.\n", agent->username);
agent_devstate_changed(agent->username);
@@ -1269,7 +1270,7 @@ static int bridge_agent_hold_push(struct ast_bridge *self, struct ast_bridge_cha
* agent will have some slightly different behavior in corner
* cases.
*/
- ast_bridge_change_state(bridge_channel, AST_BRIDGE_CHANNEL_STATE_END);
+ ast_bridge_channel_leave_bridge(bridge_channel);
return 0;
}
@@ -1393,11 +1394,11 @@ static struct ast_bridge *bridge_agent_hold_new(void)
{
struct ast_bridge *bridge;
- bridge = ast_bridge_alloc(sizeof(struct ast_bridge), &bridge_agent_hold_v_table);
- bridge = ast_bridge_base_init(bridge, AST_BRIDGE_CAPABILITY_HOLDING,
+ bridge = bridge_alloc(sizeof(struct ast_bridge), &bridge_agent_hold_v_table);
+ bridge = bridge_base_init(bridge, AST_BRIDGE_CAPABILITY_HOLDING,
AST_BRIDGE_FLAG_MERGE_INHIBIT_TO | AST_BRIDGE_FLAG_MERGE_INHIBIT_FROM
| AST_BRIDGE_FLAG_SWAP_INHIBIT_FROM | AST_BRIDGE_FLAG_TRANSFER_PROHIBITED);
- bridge = ast_bridge_register(bridge);
+ bridge = bridge_register(bridge);
return bridge;
}
@@ -1703,7 +1704,7 @@ static void caller_abort_agent(struct agent_pvt *agent)
}
/* Kick the agent out of the holding bridge to reset it. */
- ast_bridge_change_state_nolock(logged, AST_BRIDGE_CHANNEL_STATE_END);
+ ast_bridge_channel_leave_bridge_nolock(logged);
ast_bridge_channel_unlock(logged);
}
@@ -1713,7 +1714,7 @@ static int caller_safety_timeout(struct ast_bridge *bridge, struct ast_bridge_ch
if (agent->state == AGENT_STATE_CALL_PRESENT) {
ast_verb(3, "Agent '%s' did not respond. Safety timeout.\n", agent->username);
- ast_bridge_change_state(bridge_channel, AST_BRIDGE_CHANNEL_STATE_END);
+ ast_bridge_channel_leave_bridge(bridge_channel);
caller_abort_agent(agent);
}
diff --git a/bridges/bridge_builtin_features.c b/bridges/bridge_builtin_features.c
index 87b74d4e21..8554495eb3 100644
--- a/bridges/bridge_builtin_features.c
+++ b/bridges/bridge_builtin_features.c
@@ -483,7 +483,7 @@ static int feature_hangup(struct ast_bridge *bridge, struct ast_bridge_channel *
* bridge_channel to force the channel out of the bridge and the
* core takes care of the rest.
*/
- ast_bridge_change_state(bridge_channel, AST_BRIDGE_CHANNEL_STATE_END);
+ ast_bridge_channel_leave_bridge(bridge_channel);
return 0;
}
diff --git a/bridges/bridge_builtin_interval_features.c b/bridges/bridge_builtin_interval_features.c
index a4fd97ba09..2ca3f7ddb5 100644
--- a/bridges/bridge_builtin_interval_features.c
+++ b/bridges/bridge_builtin_interval_features.c
@@ -58,7 +58,7 @@ static int bridge_features_duration_callback(struct ast_bridge *bridge, struct a
ast_stream_and_wait(bridge_channel->chan, limits->duration_sound, AST_DIGIT_NONE);
}
- ast_bridge_change_state(bridge_channel, AST_BRIDGE_CHANNEL_STATE_END);
+ ast_bridge_channel_leave_bridge(bridge_channel);
ast_test_suite_event_notify("BRIDGE_TIMELIMIT", "Channel1: %s", ast_channel_name(bridge_channel->chan));
return -1;
diff --git a/include/asterisk/bridging.h b/include/asterisk/bridging.h
index 0bba614344..bc16ae0bc1 100644
--- a/include/asterisk/bridging.h
+++ b/include/asterisk/bridging.h
@@ -19,7 +19,7 @@
/*!
* \file
- * \brief Channel Bridging API
+ * \brief Bridging API
*
* \author Richard Mudgett <rmudgett@digium.com>
* \author Joshua Colp <jcolp@digium.com>
@@ -30,7 +30,7 @@
*/
/*!
- * \page AstBridging Channel Bridging API
+ * \page AstBridging Bridging API
*
* The purpose of this API is to provide an easy and flexible way to bridge
* channels of different technologies with different features.
@@ -70,10 +70,15 @@ extern "C" {
#endif
#include "asterisk/bridging_features.h"
+#include "asterisk/bridging_channel.h"
#include "asterisk/bridging_roles.h"
#include "asterisk/dsp.h"
#include "asterisk/uuid.h"
+struct ast_bridge_technology;
+struct ast_bridge;
+struct ast_bridge_tech_optimizations;
+
/*! \brief Capabilities for a bridge technology */
enum ast_bridge_capability {
/*! Bridge technology can service calls on hold. */
@@ -88,160 +93,7 @@ enum ast_bridge_capability {
AST_BRIDGE_CAPABILITY_MULTIMIX = (1 << 4),
};
-/*! \brief State information about a bridged channel */
-enum ast_bridge_channel_state {
- /*! Waiting for a signal (Channel in the bridge) */
- AST_BRIDGE_CHANNEL_STATE_WAIT = 0,
- /*! Bridged channel was forced out and should be hung up (Bridge may dissolve.) */
- AST_BRIDGE_CHANNEL_STATE_END,
- /*! Bridged channel was forced out and should be hung up */
- AST_BRIDGE_CHANNEL_STATE_HANGUP,
-};
-
-enum ast_bridge_channel_thread_state {
- /*! Bridge channel thread is idle/waiting. */
- AST_BRIDGE_CHANNEL_THREAD_IDLE,
- /*! Bridge channel thread is writing a normal/simple frame. */
- AST_BRIDGE_CHANNEL_THREAD_SIMPLE,
- /*! Bridge channel thread is processing a frame. */
- AST_BRIDGE_CHANNEL_THREAD_FRAME,
-};
-
-struct ast_bridge_technology;
-struct ast_bridge;
-
-/*!
- * \brief Structure specific to bridge technologies capable of
- * performing talking optimizations.
- */
-struct ast_bridge_tech_optimizations {
- /*! The amount of time in ms that talking must be detected before
- * the dsp determines that talking has occurred */
- unsigned int talking_threshold;
- /*! The amount of time in ms that silence must be detected before
- * the dsp determines that talking has stopped */
- unsigned int silence_threshold;
- /*! Whether or not the bridging technology should drop audio
- * detected as silence from the mix. */
- unsigned int drop_silence:1;
-};
-
-/*!
- * \brief Structure that contains information regarding a channel in a bridge
- */
-struct ast_bridge_channel {
-/* BUGBUG cond is only here because of external party suspend/unsuspend support. */
- /*! Condition, used if we want to wake up a thread waiting on the bridged channel */
- ast_cond_t cond;
- /*! Current bridged channel state */
- enum ast_bridge_channel_state state;
- /*! Asterisk channel participating in the bridge */
- struct ast_channel *chan;
- /*! Asterisk channel we are swapping with (if swapping) */
- struct ast_channel *swap;
- /*!
- * \brief Bridge this channel is participating in
- *
- * \note The bridge pointer cannot change while the bridge or
- * bridge_channel is locked.
- */
- struct ast_bridge *bridge;
- /*!
- * \brief Bridge class private channel data.
- *
- * \note This information is added when the channel is pushed
- * into the bridge and removed when it is pulled from the
- * bridge.
- */
- void *bridge_pvt;
- /*!
- * \brief Private information unique to the bridge technology.
- *
- * \note This information is added when the channel joins the
- * bridge's technology and removed when it leaves the bridge's
- * technology.
- */
- void *tech_pvt;
- /*! Thread handling the bridged channel (Needed by ast_bridge_depart) */
- pthread_t thread;
- /* v-- These flags change while the bridge is locked or before the channel is in the bridge. */
- /*! TRUE if the channel is in a bridge. */
- unsigned int in_bridge:1;
- /*! TRUE if the channel just joined the bridge. */
- unsigned int just_joined:1;
- /*! TRUE if the channel is suspended from the bridge. */
- unsigned int suspended:1;
- /*! TRUE if the channel must wait for an ast_bridge_depart to reclaim the channel. */
- unsigned int depart_wait:1;
- /* ^-- These flags change while the bridge is locked or before the channel is in the bridge. */
- /*! Features structure for features that are specific to this channel */
- struct ast_bridge_features *features;
- /*! Technology optimization parameters used by bridging technologies capable of
- * optimizing based upon talk detection. */
- struct ast_bridge_tech_optimizations tech_args;
- /*! Copy of read format used by chan before join */
- struct ast_format read_format;
- /*! Copy of write format used by chan before join */
- struct ast_format write_format;
- /*! Call ID associated with bridge channel */
- struct ast_callid *callid;
- /*! A clone of the roles living on chan when the bridge channel joins the bridge. This may require some opacification */
- struct bridge_roles_datastore *bridge_roles;
- /*! Linked list information */
- AST_LIST_ENTRY(ast_bridge_channel) entry;
- /*! Queue of outgoing frames to the channel. */
- AST_LIST_HEAD_NOLOCK(, ast_frame) wr_queue;
- /*! Pipe to alert thread when frames are put into the wr_queue. */
- int alert_pipe[2];
- /*! TRUE if the bridge channel thread is waiting on channels (needs to be atomically settable) */
- int waiting;
- /*!
- * \brief The bridge channel thread activity.
- *
- * \details Used by local channel optimization to determine if
- * the thread is in an acceptable state to optimize.
- *
- * \note Needs to be atomically settable.
- */
- enum ast_bridge_channel_thread_state activity;
-};
-
-enum ast_bridge_action_type {
- /*! Bridged channel is to detect a feature hook */
- AST_BRIDGE_ACTION_FEATURE,
- /*! Bridged channel is to act on an interval hook */
- AST_BRIDGE_ACTION_INTERVAL,
- /*! Bridged channel is to send a DTMF stream out */
- AST_BRIDGE_ACTION_DTMF_STREAM,
- /*! Bridged channel is to indicate talking start */
- AST_BRIDGE_ACTION_TALKING_START,
- /*! Bridged channel is to indicate talking stop */
- AST_BRIDGE_ACTION_TALKING_STOP,
- /*! Bridge channel is to play the indicated sound file. */
- AST_BRIDGE_ACTION_PLAY_FILE,
- /*! Bridge channel is to run the indicated application. */
- AST_BRIDGE_ACTION_RUN_APP,
- /*! Bridge channel is to run the custom callback routine. */
- AST_BRIDGE_ACTION_CALLBACK,
- /*! Bridge channel is to get parked. */
- AST_BRIDGE_ACTION_PARK,
- /*! Bridge channel is to execute a blind transfer. */
- AST_BRIDGE_ACTION_BLIND_TRANSFER,
- /*! Bridge channel is to execute an attended transfer */
- AST_BRIDGE_ACTION_ATTENDED_TRANSFER,
-
- /*
- * Bridge actions put after this comment must never be put onto
- * the bridge_channel wr_queue because they have other resources
- * that must be freed.
- */
-
- /*! Bridge reconfiguration deferred technology destruction. */
- AST_BRIDGE_ACTION_DEFERRED_TECH_DESTROY = 1000,
- /*! Bridge deferred dissolving. */
- AST_BRIDGE_ACTION_DEFERRED_DISSOLVING,
-};
-
+/*! \brief Video source modes */
enum ast_bridge_video_mode_type {
/*! Video is not allowed in the bridge */
AST_BRIDGE_VIDEO_MODE_NONE = 0,
@@ -252,14 +104,14 @@ enum ast_bridge_video_mode_type {
AST_BRIDGE_VIDEO_MODE_TALKER_SRC,
};
-/*! This is used for both SINGLE_SRC mode to set what channel
+/*! \brief This is used for both SINGLE_SRC mode to set what channel
* should be the current single video feed */
struct ast_bridge_video_single_src_data {
/*! Only accept video coming from this channel */
struct ast_channel *chan_vsrc;
};
-/*! This is used for both SINGLE_SRC_TALKER mode to set what channel
+/*! \brief This is used for both SINGLE_SRC_TALKER mode to set what channel
* should be the current single video feed */
struct ast_bridge_video_talker_src_data {
/*! Only accept video coming from this channel */
@@ -270,6 +122,7 @@ struct ast_bridge_video_talker_src_data {
struct ast_channel *chan_old_vsrc;
};
+/*! \brief Data structure that defines a video source mode */
struct ast_bridge_video_mode {
enum ast_bridge_video_mode_type mode;
/* Add data for all the video modes here. */
@@ -371,7 +224,7 @@ typedef int (*ast_bridge_merge_priority_fn)(struct ast_bridge *self);
* \brief Bridge virtual methods table definition.
*
* \note Any changes to this struct must be reflected in
- * ast_bridge_alloc() validity checking.
+ * bridge_alloc() validity checking.
*/
struct ast_bridge_methods {
/*! Bridge class name for log messages. */
@@ -390,6 +243,8 @@ struct ast_bridge_methods {
ast_bridge_merge_priority_fn get_merge_priority;
};
+struct ast_bridge_channel;
+
/*! Softmix technology parameters. */
struct ast_bridge_softmix {
/*! The video mode softmix is using */
@@ -455,75 +310,9 @@ struct ast_bridge {
char uniqueid[AST_UUID_STR_LEN];
};
-/*!
- * \brief Register the new bridge with the system.
- * \since 12.0.0
- *
- * \param bridge What to register. (Tolerates a NULL pointer)
- *
- * \code
- * struct ast_bridge *ast_bridge_basic_new(uint32_t capabilities, int flags, uint32 dtmf_features)
- * {
- * void *bridge;
- *
- * bridge = ast_bridge_alloc(sizeof(struct ast_bridge_basic), &ast_bridge_basic_v_table);
- * bridge = ast_bridge_base_init(bridge, capabilities, flags);
- * bridge = ast_bridge_basic_init(bridge, dtmf_features);
- * bridge = ast_bridge_register(bridge);
- * return bridge;
- * }
- * \endcode
- *
- * \note This must be done after a bridge constructor has
- * completed setting up the new bridge but before it returns.
- *
- * \note After a bridge is registered, ast_bridge_destroy() must
- * eventually be called to get rid of the bridge.
- *
- * \retval bridge on success.
- * \retval NULL on error.
- */
-struct ast_bridge *ast_bridge_register(struct ast_bridge *bridge);
-
-/*!
- * \internal
- * \brief Allocate the bridge class object memory.
- * \since 12.0.0
- *
- * \param size Size of the bridge class structure to allocate.
- * \param v_table Bridge class virtual method table.
- *
- * \retval bridge on success.
- * \retval NULL on error.
- */
-struct ast_bridge *ast_bridge_alloc(size_t size, const struct ast_bridge_methods *v_table);
-
/*! \brief Bridge base class virtual method table. */
extern struct ast_bridge_methods ast_bridge_base_v_table;
-/*!
- * \brief Initialize the base class of the bridge.
- *
- * \param self Bridge to operate upon. (Tolerates a NULL pointer)
- * \param capabilities The capabilities that we require to be used on the bridge
- * \param flags Flags that will alter the behavior of the bridge
- *
- * \retval self on success
- * \retval NULL on failure, self is already destroyed
- *
- * Example usage:
- *
- * \code
- * struct ast_bridge *bridge;
- * bridge = ast_bridge_alloc(sizeof(*bridge), &ast_bridge_base_v_table);
- * bridge = ast_bridge_base_init(bridge, AST_BRIDGE_CAPABILITY_1TO1MIX, AST_BRIDGE_FLAG_DISSOLVE_HANGUP);
- * \endcode
- *
- * This creates a no frills two party bridge that will be
- * destroyed once one of the channels hangs up.
- */
-struct ast_bridge *ast_bridge_base_init(struct ast_bridge *self, uint32_t capabilities, unsigned int flags);
-
/*!
* \brief Create a new base class bridge
*
@@ -824,20 +613,6 @@ int ast_bridge_move(struct ast_bridge *dst_bridge, struct ast_bridge *src_bridge
*/
void ast_bridge_merge_inhibit(struct ast_bridge *bridge, int request);
-/*!
- * \brief Adjust the bridge_channel's bridge merge inhibit request count.
- * \since 12.0.0
- *
- * \param bridge_channel What to operate on.
- * \param request Inhibit request increment.
- * (Positive to add requests. Negative to remove requests.)
- *
- * \note This API call is meant for internal bridging operations.
- *
- * \retval bridge adjusted merge inhibit with reference count.
- */
-struct ast_bridge *ast_bridge_channel_merge_inhibit(struct ast_bridge_channel *bridge_channel, int request);
-
/*!
* \brief Suspend a channel temporarily from a bridge
*
@@ -942,101 +717,6 @@ enum ast_bridge_optimization {
enum ast_bridge_optimization ast_bridges_allow_optimization(struct ast_bridge *chan_bridge,
struct ast_bridge *peer_bridge);
-/*!
- * \brief Try locking the bridge_channel.
- *
- * \param bridge_channel What to try locking
- *
- * \retval 0 on success.
- * \retval non-zero on error.
- */
-#define ast_bridge_channel_trylock(bridge_channel) _ast_bridge_channel_trylock(bridge_channel, __FILE__, __PRETTY_FUNCTION__, __LINE__, #bridge_channel)
-static inline int _ast_bridge_channel_trylock(struct ast_bridge_channel *bridge_channel, const char *file, const char *function, int line, const char *var)
-{
- return __ao2_trylock(bridge_channel, AO2_LOCK_REQ_MUTEX, file, function, line, var);
-}
-
-/*!
- * \brief Lock the bridge_channel.
- *
- * \param bridge_channel What to lock
- *
- * \return Nothing
- */
-#define ast_bridge_channel_lock(bridge_channel) _ast_bridge_channel_lock(bridge_channel, __FILE__, __PRETTY_FUNCTION__, __LINE__, #bridge_channel)
-static inline void _ast_bridge_channel_lock(struct ast_bridge_channel *bridge_channel, const char *file, const char *function, int line, const char *var)
-{
- __ao2_lock(bridge_channel, AO2_LOCK_REQ_MUTEX, file, function, line, var);
-}
-
-/*!
- * \brief Unlock the bridge_channel.
- *
- * \param bridge_channel What to unlock
- *
- * \return Nothing
- */
-#define ast_bridge_channel_unlock(bridge_channel) _ast_bridge_channel_unlock(bridge_channel, __FILE__, __PRETTY_FUNCTION__, __LINE__, #bridge_channel)
-static inline void _ast_bridge_channel_unlock(struct ast_bridge_channel *bridge_channel, const char *file, const char *function, int line, const char *var)
-{
- __ao2_unlock(bridge_channel, file, function, line, var);
-}
-
-/*!
- * \brief Lock the bridge associated with the bridge channel.
- * \since 12.0.0
- *
- * \param bridge_channel Channel that wants to lock the bridge.
- *
- * \details
- * This is an upstream lock operation. The defined locking
- * order is bridge then bridge_channel.
- *
- * \note On entry, neither the bridge nor bridge_channel is locked.
- *
- * \note The bridge_channel->bridge pointer changes because of a
- * bridge-merge/channel-move operation between bridges.
- *
- * \return Nothing
- */
-void ast_bridge_channel_lock_bridge(struct ast_bridge_channel *bridge_channel);
-
-/*!
- * \brief Set bridge channel state to leave bridge (if not leaving already) with no lock.
- *
- * \param bridge_channel Channel to change the state on
- * \param new_state The new state to place the channel into
- *
- * \note This API call is only meant to be used within the
- * bridging module and hook callbacks to request the channel
- * exit the bridge.
- *
- * \note This function assumes the bridge_channel is locked.
- */
-void ast_bridge_change_state_nolock(struct ast_bridge_channel *bridge_channel, enum ast_bridge_channel_state new_state);
-
-/*!
- * \brief Set bridge channel state to leave bridge (if not leaving already).
- *
- * \param bridge_channel Channel to change the state on
- * \param new_state The new state to place the channel into
- *
- * Example usage:
- *
- * \code
- * ast_bridge_change_state(bridge_channel, AST_BRIDGE_CHANNEL_STATE_HANGUP);
- * \endcode
- *
- * This places the channel pointed to by bridge_channel into the
- * state AST_BRIDGE_CHANNEL_STATE_HANGUP if it was
- * AST_BRIDGE_CHANNEL_STATE_WAIT before.
- *
- * \note This API call is only meant to be used within the
- * bridging module and hook callbacks to request the channel
- * exit the bridge.
- */
-void ast_bridge_change_state(struct ast_bridge_channel *bridge_channel, enum ast_bridge_channel_state new_state);
-
/*!
* \brief Put an action onto the specified bridge.
* \since 12.0.0
@@ -1052,37 +732,6 @@ void ast_bridge_change_state(struct ast_bridge_channel *bridge_channel, enum ast
*/
int ast_bridge_queue_action(struct ast_bridge *bridge, struct ast_frame *action);
-/*!
- * \brief Update the linkedid for all channels in a bridge
- * \since 12.0.0
- *
- * \param bridge The bridge to update the linkedids on
- * \param bridge_channel The channel joining the bridge
- * \param swap The channel being swapped out of the bridge. May be NULL.
- *
- * \note The bridge must be locked prior to calling this function.
- * \note This API call is meant for internal bridging operations.
- */
-void ast_bridge_update_linkedids(struct ast_bridge *bridge, struct ast_bridge_channel *bridge_channel, struct ast_bridge_channel *swap);
-
-/*!
- * \brief Update the accountcodes for a channel entering a bridge
- * \since 12.0.0
- *
- * This function updates the accountcode and peeraccount on channels in two-party
- * bridges. In multi-party bridges, peeraccount is not set - it doesn't make much sense -
- * however accountcode propagation will still occur if the channel joining has an
- * accountcode.
- *
- * \param bridge The bridge to update the accountcodes in
- * \param bridge_channel The channel joining the bridge
- * \param swap The channel being swapped out of the bridge. May be NULL.
- *
- * \note The bridge must be locked prior to calling this function.
- * \note This API call is meant for internal bridging operations.
- */
-void ast_bridge_update_accountcodes(struct ast_bridge *bridge, struct ast_bridge_channel *bridge_channel, struct ast_bridge_channel *swap);
-
/*!
* \brief Queue the given frame to everyone else.
* \since 12.0.0
@@ -1099,319 +748,6 @@ void ast_bridge_update_accountcodes(struct ast_bridge *bridge, struct ast_bridge
*/
int ast_bridge_queue_everyone_else(struct ast_bridge *bridge, struct ast_bridge_channel *bridge_channel, struct ast_frame *frame);
-/*!
- * \brief Write a frame to the specified bridge_channel.
- * \since 12.0.0
- *
- * \param bridge_channel Channel to queue the frame.
- * \param fr Frame to write.
- *
- * \retval 0 on success.
- * \retval -1 on error.
- *
- * \note This API call is meant for internal bridging operations.
- * \note BUGBUG This may get moved.
- */
-int ast_bridge_channel_queue_frame(struct ast_bridge_channel *bridge_channel, struct ast_frame *fr);
-
-/*!
- * \brief Used to queue an action frame onto a bridge channel and write an action frame into a bridge.
- * \since 12.0.0
- *
- * \param bridge_channel Which channel work with.
- * \param action Type of bridge action frame.
- * \param data Frame payload data to pass.
- * \param datalen Frame payload data length to pass.
- *
- * \retval 0 on success.
- * \retval -1 on error.
- */
-typedef int (*ast_bridge_channel_post_action_data)(struct ast_bridge_channel *bridge_channel, enum ast_bridge_action_type action, const void *data, size_t datalen);
-
-/*!
- * \brief Queue an action frame onto the bridge channel with data.
- * \since 12.0.0
- *
- * \param bridge_channel Which channel to queue the frame onto.
- * \param action Type of bridge action frame.
- * \param data Frame payload data to pass.
- * \param datalen Frame payload data length to pass.
- *
- * \retval 0 on success.
- * \retval -1 on error.
- */
-int ast_bridge_channel_queue_action_data(struct ast_bridge_channel *bridge_channel, enum ast_bridge_action_type action, const void *data, size_t datalen);
-
-/*!
- * \brief Write an action frame into the bridge with data.
- * \since 12.0.0
- *
- * \param bridge_channel Which channel is putting the frame into the bridge.
- * \param action Type of bridge action frame.
- * \param data Frame payload data to pass.
- * \param datalen Frame payload data length to pass.
- *
- * \retval 0 on success.
- * \retval -1 on error.
- */
-int ast_bridge_channel_write_action_data(struct ast_bridge_channel *bridge_channel, enum ast_bridge_action_type action, const void *data, size_t datalen);
-
-/*!
- * \brief Queue a control frame onto the bridge channel with data.
- * \since 12.0.0
- *
- * \param bridge_channel Which channel to queue the frame onto.
- * \param control Type of control frame.
- * \param data Frame payload data to pass.
- * \param datalen Frame payload data length to pass.
- *
- * \retval 0 on success.
- * \retval -1 on error.
- */
-int ast_bridge_channel_queue_control_data(struct ast_bridge_channel *bridge_channel, enum ast_control_frame_type control, const void *data, size_t datalen);
-
-/*!
- * \brief Write a control frame into the bridge with data.
- * \since 12.0.0
- *
- * \param bridge_channel Which channel is putting the frame into the bridge.
- * \param control Type of control frame.
- * \param data Frame payload data to pass.
- * \param datalen Frame payload data length to pass.
- *
- * \retval 0 on success.
- * \retval -1 on error.
- */
-int ast_bridge_channel_write_control_data(struct ast_bridge_channel *bridge_channel, enum ast_control_frame_type control, const void *data, size_t datalen);
-
-/*!
- * \brief Write a hold frame into the bridge.
- * \since 12.0.0
- *
- * \param bridge_channel Which channel is putting the hold into the bridge.
- * \param moh_class The suggested music class for the other end to use.
- *
- * \retval 0 on success.
- * \retval -1 on error.
- */
-int ast_bridge_channel_write_hold(struct ast_bridge_channel *bridge_channel, const char *moh_class);
-
-/*!
- * \brief Write an unhold frame into the bridge.
- * \since 12.0.0
- *
- * \param bridge_channel Which channel is putting the hold into the bridge.
- *
- * \retval 0 on success.
- * \retval -1 on error.
- */
-int ast_bridge_channel_write_unhold(struct ast_bridge_channel *bridge_channel);
-
-/*!
- * \brief Run an application on the bridge channel.
- * \since 12.0.0
- *
- * \param bridge_channel Which channel to run the application on.
- * \param app_name Dialplan application name.
- * \param app_args Arguments for the application. (NULL tolerant)
- * \param moh_class MOH class to request bridge peers to hear while application is running.
- * NULL if no MOH.
- * Empty if default MOH class.
- *
- * \note This is intended to be called by bridge hooks.
- *
- * \return Nothing
- */
-void ast_bridge_channel_run_app(struct ast_bridge_channel *bridge_channel, const char *app_name, const char *app_args, const char *moh_class);
-
-/*!
- * \brief Write a bridge action run application frame into the bridge.
- * \since 12.0.0
- *
- * \param bridge_channel Which channel is putting the frame into the bridge
- * \param app_name Dialplan application name.
- * \param app_args Arguments for the application. (NULL or empty for no arguments)
- * \param moh_class MOH class to request bridge peers to hear while application is running.
- * NULL if no MOH.
- * Empty if default MOH class.
- *
- * \note This is intended to be called by bridge hooks.
- *
- * \retval 0 on success.
- * \retval -1 on error.
- */
-int ast_bridge_channel_write_app(struct ast_bridge_channel *bridge_channel, const char *app_name, const char *app_args, const char *moh_class);
-
-/*!
- * \brief Queue a bridge action run application frame onto the bridge channel.
- * \since 12.0.0
- *
- * \param bridge_channel Which channel to put the frame onto
- * \param app_name Dialplan application name.
- * \param app_args Arguments for the application. (NULL or empty for no arguments)
- * \param moh_class MOH class to request bridge peers to hear while application is running.
- * NULL if no MOH.
- * Empty if default MOH class.
- *
- * \note This is intended to be called by bridge hooks.
- *
- * \retval 0 on success.
- * \retval -1 on error.
- */
-int ast_bridge_channel_queue_app(struct ast_bridge_channel *bridge_channel, const char *app_name, const char *app_args, const char *moh_class);
-
-/*!
- * \brief Custom interpretation of the playfile name.
- *
- * \param bridge_channel Which channel to play the file on
- * \param playfile Sound filename to play.
- *
- * \return Nothing
- */
-typedef void (*ast_bridge_custom_play_fn)(struct ast_bridge_channel *bridge_channel, const char *playfile);
-
-/*!
- * \brief Play a file on the bridge channel.
- * \since 12.0.0
- *
- * \param bridge_channel Which channel to play the file on
- * \param custom_play Call this function to play the playfile. (NULL if normal sound file to play)
- * \param playfile Sound filename to play.
- * \param moh_class MOH class to request bridge peers to hear while file is played.
- * NULL if no MOH.
- * Empty if default MOH class.
- *
- * \note This is intended to be called by bridge hooks.
- *
- * \return Nothing
- */
-void ast_bridge_channel_playfile(struct ast_bridge_channel *bridge_channel, ast_bridge_custom_play_fn custom_play, const char *playfile, const char *moh_class);
-
-/*!
- * \brief Write a bridge action play file frame into the bridge.
- * \since 12.0.0
- *
- * \param bridge_channel Which channel is putting the frame into the bridge
- * \param custom_play Call this function to play the playfile. (NULL if normal sound file to play)
- * \param playfile Sound filename to play.
- * \param moh_class MOH class to request bridge peers to hear while file is played.
- * NULL if no MOH.
- * Empty if default MOH class.
- *
- * \note This is intended to be called by bridge hooks.
- *
- * \retval 0 on success.
- * \retval -1 on error.
- */
-int ast_bridge_channel_write_playfile(struct ast_bridge_channel *bridge_channel, ast_bridge_custom_play_fn custom_play, const char *playfile, const char *moh_class);
-
-/*!
- * \brief Queue a bridge action play file frame onto the bridge channel.
- * \since 12.0.0
- *
- * \param bridge_channel Which channel to put the frame onto.
- * \param custom_play Call this function to play the playfile. (NULL if normal sound file to play)
- * \param playfile Sound filename to play.
- * \param moh_class MOH class to request bridge peers to hear while file is played.
- * NULL if no MOH.
- * Empty if default MOH class.
- *
- * \note This is intended to be called by bridge hooks.
- *
- * \retval 0 on success.
- * \retval -1 on error.
- */
-int ast_bridge_channel_queue_playfile(struct ast_bridge_channel *bridge_channel, ast_bridge_custom_play_fn custom_play, const char *playfile, const char *moh_class);
-
-/*!
- * \brief Custom callback run on a bridge channel.
- *
- * \param bridge_channel Which channel to operate on.
- * \param payload Data to pass to the callback. (NULL if none).
- * \param payload_size Size of the payload if payload is non-NULL. A number otherwise.
- *
- * \note The payload MUST NOT have any resources that need to be freed.
- *
- * \return Nothing
- */
-typedef void (*ast_bridge_custom_callback_fn)(struct ast_bridge_channel *bridge_channel, const void *payload, size_t payload_size);
-
-/*!
- * \brief Write a bridge action custom callback frame into the bridge.
- * \since 12.0.0
- *
- * \param bridge_channel Which channel is putting the frame into the bridge
- * \param callback Custom callback run on a bridge channel.
- * \param payload Data to pass to the callback. (NULL if none).
- * \param payload_size Size of the payload if payload is non-NULL. A number otherwise.
- *
- * \note The payload MUST NOT have any resources that need to be freed.
- *
- * \note This is intended to be called by bridge hooks.
- *
- * \retval 0 on success.
- * \retval -1 on error.
- */
-int ast_bridge_channel_write_callback(struct ast_bridge_channel *bridge_channel, ast_bridge_custom_callback_fn callback, const void *payload, size_t payload_size);
-
-/*!
- * \brief Queue a bridge action custom callback frame onto the bridge channel.
- * \since 12.0.0
- *
- * \param bridge_channel Which channel to put the frame onto.
- * \param callback Custom callback run on a bridge channel.
- * \param payload Data to pass to the callback. (NULL if none).
- * \param payload_size Size of the payload if payload is non-NULL. A number otherwise.
- *
- * \note The payload MUST NOT have any resources that need to be freed.
- *
- * \note This is intended to be called by bridge hooks.
- *
- * \retval 0 on success.
- * \retval -1 on error.
- */
-int ast_bridge_channel_queue_callback(struct ast_bridge_channel *bridge_channel, ast_bridge_custom_callback_fn callback, const void *payload, size_t payload_size);
-
-/*!
- * \brief Have a bridge channel park a channel in the bridge
- * \since 12.0.0
- *
- * \param bridge_channel Bridge channel performing the parking
- * \param parkee_uuid Unique id of the channel we want to park
- * \param parker_uuid Unique id of the channel parking the call
- * \param app_data string indicating data used for park application (NULL allowed)
- *
- * \note This is intended to be called by bridge hooks.
- *
- * \retval 0 on success.
- * \retval -1 on error.
- */
-int ast_bridge_channel_write_park(struct ast_bridge_channel *bridge_channel, const char *parkee_uuid,
- const char *parker_uuid, const char *app_data);
-
-/*!
- * \brief Restore the formats of a bridge channel's channel to how they were before bridge_channel_join
- * \since 12.0.0
- *
- * \param bridge_channel Channel to restore
- */
-void ast_bridge_channel_restore_formats(struct ast_bridge_channel *bridge_channel);
-
-/*!
- * \brief Get the peer bridge channel of a two party bridge.
- * \since 12.0.0
- *
- * \param bridge_channel What to get the peer of.
- *
- * \note On entry, bridge_channel->bridge is already locked.
- *
- * \note This is an internal bridge function.
- *
- * \retval peer on success.
- * \retval NULL no peer channel.
- */
-struct ast_bridge_channel *ast_bridge_channel_peer(struct ast_bridge_channel *bridge_channel);
-
/*!
* \brief Adjust the internal mixing sample rate of a bridge
* used during multimix mode.
@@ -1810,6 +1146,7 @@ struct ast_channel *ast_bridge_peer(struct ast_bridge *bridge, struct ast_channe
* \return Nothing
*/
void ast_bridge_features_remove(struct ast_bridge_features *features, enum ast_bridge_hook_remove_flags flags);
+
#if defined(__cplusplus) || defined(c_plusplus)
}
#endif
diff --git a/include/asterisk/bridging_channel.h b/include/asterisk/bridging_channel.h
new file mode 100644
index 0000000000..dc559030c2
--- /dev/null
+++ b/include/asterisk/bridging_channel.h
@@ -0,0 +1,576 @@
+/*
+ * Asterisk -- An open source telephony toolkit.
+ *
+ * Copyright (C) 2013 Digium, Inc.
+ *
+ * Joshua Colp <jcolp@digium.com>
+ * Richard Mudgett <rmudgett@digium.com>
+ * Matt Jordan <mjordan@digium.com>
+ *
+ * See http://www.asterisk.org for more information about
+ * the Asterisk project. Please do not directly contact
+ * any of the maintainers of this project for assistance;
+ * the project provides a web site, mailing lists and IRC
+ * channels for your use.
+ *
+ * This program is free software, distributed under the terms of
+ * the GNU General Public License Version 2. See the LICENSE file
+ * at the top of the source tree.
+ */
+
+/*!
+ * \file
+ * \brief Bridging Channel API
+ *
+ * An API that act on a channel in a bridge
+ *
+ * \author Joshua Colp <jcolp@digium.com>
+ * \author Richard Mudgett <rmudgett@digium.com>
+ * \author Matt Jordan <mjordan@digium.com>
+ *
+ * See Also:
+ * \ref bridging.h
+ * \arg \ref AstCREDITS
+ */
+
+#ifndef _ASTERISK_BRIDGING_CHANNEL_H
+#define _ASTERISK_BRIDGING_CHANNEL_H
+
+#if defined(__cplusplus) || defined(c_plusplus)
+extern "C" {
+#endif
+
+#include "asterisk/bridging_technology.h"
+
+/*! \brief State information about a bridged channel */
+enum ast_bridge_channel_state {
+ /*! Waiting for a signal (Channel in the bridge) */
+ AST_BRIDGE_CHANNEL_STATE_WAIT = 0,
+ /*! Bridged channel was forced out and should be hung up (Bridge may dissolve.) */
+ AST_BRIDGE_CHANNEL_STATE_END,
+ /*! Bridged channel was forced out and should be hung up */
+ AST_BRIDGE_CHANNEL_STATE_HANGUP,
+};
+
+enum ast_bridge_channel_thread_state {
+ /*! Bridge channel thread is idle/waiting. */
+ AST_BRIDGE_CHANNEL_THREAD_IDLE,
+ /*! Bridge channel thread is writing a normal/simple frame. */
+ AST_BRIDGE_CHANNEL_THREAD_SIMPLE,
+ /*! Bridge channel thread is processing a frame. */
+ AST_BRIDGE_CHANNEL_THREAD_FRAME,
+};
+
+/*! \brief Actions that can be taken on a channel in a bridge */
+enum ast_bridge_action_type {
+ /*! Bridged channel is to detect a feature hook */
+ AST_BRIDGE_ACTION_FEATURE,
+ /*! Bridged channel is to act on an interval hook */
+ AST_BRIDGE_ACTION_INTERVAL,
+ /*! Bridged channel is to send a DTMF stream out */
+ AST_BRIDGE_ACTION_DTMF_STREAM,
+ /*! Bridged channel is to indicate talking start */
+ AST_BRIDGE_ACTION_TALKING_START,
+ /*! Bridged channel is to indicate talking stop */
+ AST_BRIDGE_ACTION_TALKING_STOP,
+ /*! Bridge channel is to play the indicated sound file. */
+ AST_BRIDGE_ACTION_PLAY_FILE,
+ /*! Bridge channel is to run the indicated application. */
+ AST_BRIDGE_ACTION_RUN_APP,
+ /*! Bridge channel is to run the custom callback routine. */
+ AST_BRIDGE_ACTION_CALLBACK,
+ /*! Bridge channel is to get parked. */
+ AST_BRIDGE_ACTION_PARK,
+ /*! Bridge channel is to execute a blind transfer. */
+ AST_BRIDGE_ACTION_BLIND_TRANSFER,
+ /*! Bridge channel is to execute an attended transfer */
+ AST_BRIDGE_ACTION_ATTENDED_TRANSFER,
+
+ /*
+ * Bridge actions put after this comment must never be put onto
+ * the bridge_channel wr_queue because they have other resources
+ * that must be freed.
+ */
+
+ /*! Bridge reconfiguration deferred technology destruction. */
+ AST_BRIDGE_ACTION_DEFERRED_TECH_DESTROY = 1000,
+ /*! Bridge deferred dissolving. */
+ AST_BRIDGE_ACTION_DEFERRED_DISSOLVING,
+};
+
+struct ast_bridge;
+struct ast_bridge_tech_optimizations;
+
+ /*!
+ * \brief Structure that contains information regarding a channel in a bridge
+ */
+struct ast_bridge_channel {
+/* BUGBUG cond is only here because of external party suspend/unsuspend support. */
+ /*! Condition, used if we want to wake up a thread waiting on the bridged channel */
+ ast_cond_t cond;
+ /*! Current bridged channel state */
+ enum ast_bridge_channel_state state;
+ /*! Asterisk channel participating in the bridge */
+ struct ast_channel *chan;
+ /*! Asterisk channel we are swapping with (if swapping) */
+ struct ast_channel *swap;
+ /*!
+ * \brief Bridge this channel is participating in
+ *
+ * \note The bridge pointer cannot change while the bridge or
+ * bridge_channel is locked.
+ */
+ struct ast_bridge *bridge;
+ /*!
+ * \brief Bridge class private channel data.
+ *
+ * \note This information is added when the channel is pushed
+ * into the bridge and removed when it is pulled from the
+ * bridge.
+ */
+ void *bridge_pvt;
+ /*!
+ * \brief Private information unique to the bridge technology.
+ *
+ * \note This information is added when the channel joins the
+ * bridge's technology and removed when it leaves the bridge's
+ * technology.
+ */
+ void *tech_pvt;
+ /*! Thread handling the bridged channel (Needed by ast_bridge_depart) */
+ pthread_t thread;
+ /* v-- These flags change while the bridge is locked or before the channel is in the bridge. */
+ /*! TRUE if the channel is in a bridge. */
+ unsigned int in_bridge:1;
+ /*! TRUE if the channel just joined the bridge. */
+ unsigned int just_joined:1;
+ /*! TRUE if the channel is suspended from the bridge. */
+ unsigned int suspended:1;
+ /*! TRUE if the channel must wait for an ast_bridge_depart to reclaim the channel. */
+ unsigned int depart_wait:1;
+ /* ^-- These flags change while the bridge is locked or before the channel is in the bridge. */
+ /*! Features structure for features that are specific to this channel */
+ struct ast_bridge_features *features;
+ /*! Technology optimization parameters used by bridging technologies capable of
+ * optimizing based upon talk detection. */
+ struct ast_bridge_tech_optimizations tech_args;
+ /*! Copy of read format used by chan before join */
+ struct ast_format read_format;
+ /*! Copy of write format used by chan before join */
+ struct ast_format write_format;
+ /*! Call ID associated with bridge channel */
+ struct ast_callid *callid;
+ /*! A clone of the roles living on chan when the bridge channel joins the bridge. This may require some opacification */
+ struct bridge_roles_datastore *bridge_roles;
+ /*! Linked list information */
+ AST_LIST_ENTRY(ast_bridge_channel) entry;
+ /*! Queue of outgoing frames to the channel. */
+ AST_LIST_HEAD_NOLOCK(, ast_frame) wr_queue;
+ /*! Pipe to alert thread when frames are put into the wr_queue. */
+ int alert_pipe[2];
+ /*! TRUE if the bridge channel thread is waiting on channels (needs to be atomically settable) */
+ int waiting;
+ /*!
+ * \brief The bridge channel thread activity.
+ *
+ * \details Used by local channel optimization to determine if
+ * the thread is in an acceptable state to optimize.
+ *
+ * \note Needs to be atomically settable.
+ */
+ enum ast_bridge_channel_thread_state activity;
+};
+
+/*!
+ * \brief Try locking the bridge_channel.
+ *
+ * \param bridge_channel What to try locking
+ *
+ * \retval 0 on success.
+ * \retval non-zero on error.
+ */
+#define ast_bridge_channel_trylock(bridge_channel) _ast_bridge_channel_trylock(bridge_channel, __FILE__, __PRETTY_FUNCTION__, __LINE__, #bridge_channel)
+static inline int _ast_bridge_channel_trylock(struct ast_bridge_channel *bridge_channel, const char *file, const char *function, int line, const char *var)
+{
+ return __ao2_trylock(bridge_channel, AO2_LOCK_REQ_MUTEX, file, function, line, var);
+}
+
+/*!
+ * \brief Lock the bridge_channel.
+ *
+ * \param bridge_channel What to lock
+ *
+ * \return Nothing
+ */
+#define ast_bridge_channel_lock(bridge_channel) _ast_bridge_channel_lock(bridge_channel, __FILE__, __PRETTY_FUNCTION__, __LINE__, #bridge_channel)
+static inline void _ast_bridge_channel_lock(struct ast_bridge_channel *bridge_channel, const char *file, const char *function, int line, const char *var)
+{
+ __ao2_lock(bridge_channel, AO2_LOCK_REQ_MUTEX, file, function, line, var);
+}
+
+/*!
+ * \brief Unlock the bridge_channel.
+ *
+ * \param bridge_channel What to unlock
+ *
+ * \return Nothing
+ */
+#define ast_bridge_channel_unlock(bridge_channel) _ast_bridge_channel_unlock(bridge_channel, __FILE__, __PRETTY_FUNCTION__, __LINE__, #bridge_channel)
+static inline void _ast_bridge_channel_unlock(struct ast_bridge_channel *bridge_channel, const char *file, const char *function, int line, const char *var)
+{
+ __ao2_unlock(bridge_channel, file, function, line, var);
+}
+
+/*!
+ * \brief Lock the bridge associated with the bridge channel.
+ * \since 12.0.0
+ *
+ * \param bridge_channel Channel that wants to lock the bridge.
+ *
+ * \details
+ * This is an upstream lock operation. The defined locking
+ * order is bridge then bridge_channel.
+ *
+ * \note On entry, neither the bridge nor bridge_channel is locked.
+ *
+ * \note The bridge_channel->bridge pointer changes because of a
+ * bridge-merge/channel-move operation between bridges.
+ *
+ * \return Nothing
+ */
+void ast_bridge_channel_lock_bridge(struct ast_bridge_channel *bridge_channel);
+
+/*!
+ * \brief Ask the bridged channel to leave the bridge it is currently in
+ *
+ * \param bridge_channel Channel to leave the bridge
+ */
+void ast_bridge_channel_leave_bridge(struct ast_bridge_channel *bridge_channel);
+
+/*!
+ * \brief Ask the bridged channel to leave the bridge it is currently in
+ *
+ * \param bridge_channel Channel to leave the bridge
+ *
+ * \note This function assumes the bridge_channel is locked.
+ */
+void ast_bridge_channel_leave_bridge_nolock(struct ast_bridge_channel *bridge_channel);
+
+/*!
+ * \brief Write a frame to the specified bridge_channel.
+ * \since 12.0.0
+ *
+ * \param bridge_channel Channel to queue the frame.
+ * \param fr Frame to write.
+ *
+ * \retval 0 on success.
+ * \retval -1 on error.
+ *
+ * \note This API call is meant for internal bridging operations.
+ * \note BUGBUG This may get moved.
+ */
+int ast_bridge_channel_queue_frame(struct ast_bridge_channel *bridge_channel, struct ast_frame *fr);
+
+/*!
+ * \brief Used to queue an action frame onto a bridge channel and write an action frame into a bridge.
+ * \since 12.0.0
+ *
+ * \param bridge_channel Which channel work with.
+ * \param action Type of bridge action frame.
+ * \param data Frame payload data to pass.
+ * \param datalen Frame payload data length to pass.
+ *
+ * \retval 0 on success.
+ * \retval -1 on error.
+ */
+typedef int (*ast_bridge_channel_post_action_data)(struct ast_bridge_channel *bridge_channel, enum ast_bridge_action_type action, const void *data, size_t datalen);
+
+/*!
+ * \brief Queue an action frame onto the bridge channel with data.
+ * \since 12.0.0
+ *
+ * \param bridge_channel Which channel to queue the frame onto.
+ * \param action Type of bridge action frame.
+ * \param data Frame payload data to pass.
+ * \param datalen Frame payload data length to pass.
+ *
+ * \retval 0 on success.
+ * \retval -1 on error.
+ */
+int ast_bridge_channel_queue_action_data(struct ast_bridge_channel *bridge_channel, enum ast_bridge_action_type action, const void *data, size_t datalen);
+
+/*!
+ * \brief Write an action frame into the bridge with data.
+ * \since 12.0.0
+ *
+ * \param bridge_channel Which channel is putting the frame into the bridge.
+ * \param action Type of bridge action frame.
+ * \param data Frame payload data to pass.
+ * \param datalen Frame payload data length to pass.
+ *
+ * \retval 0 on success.
+ * \retval -1 on error.
+ */
+int ast_bridge_channel_write_action_data(struct ast_bridge_channel *bridge_channel, enum ast_bridge_action_type action, const void *data, size_t datalen);
+
+/*!
+ * \brief Queue a control frame onto the bridge channel with data.
+ * \since 12.0.0
+ *
+ * \param bridge_channel Which channel to queue the frame onto.
+ * \param control Type of control frame.
+ * \param data Frame payload data to pass.
+ * \param datalen Frame payload data length to pass.
+ *
+ * \retval 0 on success.
+ * \retval -1 on error.
+ */
+int ast_bridge_channel_queue_control_data(struct ast_bridge_channel *bridge_channel, enum ast_control_frame_type control, const void *data, size_t datalen);
+
+/*!
+ * \brief Write a control frame into the bridge with data.
+ * \since 12.0.0
+ *
+ * \param bridge_channel Which channel is putting the frame into the bridge.
+ * \param control Type of control frame.
+ * \param data Frame payload data to pass.
+ * \param datalen Frame payload data length to pass.
+ *
+ * \retval 0 on success.
+ * \retval -1 on error.
+ */
+int ast_bridge_channel_write_control_data(struct ast_bridge_channel *bridge_channel, enum ast_control_frame_type control, const void *data, size_t datalen);
+
+/*!
+ * \brief Write a hold frame into the bridge.
+ * \since 12.0.0
+ *
+ * \param bridge_channel Which channel is putting the hold into the bridge.
+ * \param moh_class The suggested music class for the other end to use.
+ *
+ * \retval 0 on success.
+ * \retval -1 on error.
+ */
+int ast_bridge_channel_write_hold(struct ast_bridge_channel *bridge_channel, const char *moh_class);
+
+/*!
+ * \brief Write an unhold frame into the bridge.
+ * \since 12.0.0
+ *
+ * \param bridge_channel Which channel is putting the hold into the bridge.
+ *
+ * \retval 0 on success.
+ * \retval -1 on error.
+ */
+int ast_bridge_channel_write_unhold(struct ast_bridge_channel *bridge_channel);
+
+/*!
+ * \brief Run an application on the bridge channel.
+ * \since 12.0.0
+ *
+ * \param bridge_channel Which channel to run the application on.
+ * \param app_name Dialplan application name.
+ * \param app_args Arguments for the application. (NULL tolerant)
+ * \param moh_class MOH class to request bridge peers to hear while application is running.
+ * NULL if no MOH.
+ * Empty if default MOH class.
+ *
+ * \note This is intended to be called by bridge hooks.
+ *
+ * \return Nothing
+ */
+void ast_bridge_channel_run_app(struct ast_bridge_channel *bridge_channel, const char *app_name, const char *app_args, const char *moh_class);
+
+/*!
+ * \brief Write a bridge action run application frame into the bridge.
+ * \since 12.0.0
+ *
+ * \param bridge_channel Which channel is putting the frame into the bridge
+ * \param app_name Dialplan application name.
+ * \param app_args Arguments for the application. (NULL or empty for no arguments)
+ * \param moh_class MOH class to request bridge peers to hear while application is running.
+ * NULL if no MOH.
+ * Empty if default MOH class.
+ *
+ * \note This is intended to be called by bridge hooks.
+ *
+ * \retval 0 on success.
+ * \retval -1 on error.
+ */
+int ast_bridge_channel_write_app(struct ast_bridge_channel *bridge_channel, const char *app_name, const char *app_args, const char *moh_class);
+
+/*!
+ * \brief Queue a bridge action run application frame onto the bridge channel.
+ * \since 12.0.0
+ *
+ * \param bridge_channel Which channel to put the frame onto
+ * \param app_name Dialplan application name.
+ * \param app_args Arguments for the application. (NULL or empty for no arguments)
+ * \param moh_class MOH class to request bridge peers to hear while application is running.
+ * NULL if no MOH.
+ * Empty if default MOH class.
+ *
+ * \note This is intended to be called by bridge hooks.
+ *
+ * \retval 0 on success.
+ * \retval -1 on error.
+ */
+int ast_bridge_channel_queue_app(struct ast_bridge_channel *bridge_channel, const char *app_name, const char *app_args, const char *moh_class);
+
+/*!
+ * \brief Custom interpretation of the playfile name.
+ *
+ * \param bridge_channel Which channel to play the file on
+ * \param playfile Sound filename to play.
+ *
+ * \return Nothing
+ */
+typedef void (*ast_bridge_custom_play_fn)(struct ast_bridge_channel *bridge_channel, const char *playfile);
+
+/*!
+ * \brief Play a file on the bridge channel.
+ * \since 12.0.0
+ *
+ * \param bridge_channel Which channel to play the file on
+ * \param custom_play Call this function to play the playfile. (NULL if normal sound file to play)
+ * \param playfile Sound filename to play.
+ * \param moh_class MOH class to request bridge peers to hear while file is played.
+ * NULL if no MOH.
+ * Empty if default MOH class.
+ *
+ * \note This is intended to be called by bridge hooks.
+ *
+ * \return Nothing
+ */
+void ast_bridge_channel_playfile(struct ast_bridge_channel *bridge_channel, ast_bridge_custom_play_fn custom_play, const char *playfile, const char *moh_class);
+
+/*!
+ * \brief Write a bridge action play file frame into the bridge.
+ * \since 12.0.0
+ *
+ * \param bridge_channel Which channel is putting the frame into the bridge
+ * \param custom_play Call this function to play the playfile. (NULL if normal sound file to play)
+ * \param playfile Sound filename to play.
+ * \param moh_class MOH class to request bridge peers to hear while file is played.
+ * NULL if no MOH.
+ * Empty if default MOH class.
+ *
+ * \note This is intended to be called by bridge hooks.
+ *
+ * \retval 0 on success.
+ * \retval -1 on error.
+ */
+int ast_bridge_channel_write_playfile(struct ast_bridge_channel *bridge_channel, ast_bridge_custom_play_fn custom_play, const char *playfile, const char *moh_class);
+
+/*!
+ * \brief Queue a bridge action play file frame onto the bridge channel.
+ * \since 12.0.0
+ *
+ * \param bridge_channel Which channel to put the frame onto.
+ * \param custom_play Call this function to play the playfile. (NULL if normal sound file to play)
+ * \param playfile Sound filename to play.
+ * \param moh_class MOH class to request bridge peers to hear while file is played.
+ * NULL if no MOH.
+ * Empty if default MOH class.
+ *
+ * \note This is intended to be called by bridge hooks.
+ *
+ * \retval 0 on success.
+ * \retval -1 on error.
+ */
+int ast_bridge_channel_queue_playfile(struct ast_bridge_channel *bridge_channel, ast_bridge_custom_play_fn custom_play, const char *playfile, const char *moh_class);
+
+/*!
+ * \brief Custom callback run on a bridge channel.
+ *
+ * \param bridge_channel Which channel to operate on.
+ * \param payload Data to pass to the callback. (NULL if none).
+ * \param payload_size Size of the payload if payload is non-NULL. A number otherwise.
+ *
+ * \note The payload MUST NOT have any resources that need to be freed.
+ *
+ * \return Nothing
+ */
+typedef void (*ast_bridge_custom_callback_fn)(struct ast_bridge_channel *bridge_channel, const void *payload, size_t payload_size);
+
+/*!
+ * \brief Write a bridge action custom callback frame into the bridge.
+ * \since 12.0.0
+ *
+ * \param bridge_channel Which channel is putting the frame into the bridge
+ * \param callback Custom callback run on a bridge channel.
+ * \param payload Data to pass to the callback. (NULL if none).
+ * \param payload_size Size of the payload if payload is non-NULL. A number otherwise.
+ *
+ * \note The payload MUST NOT have any resources that need to be freed.
+ *
+ * \note This is intended to be called by bridge hooks.
+ *
+ * \retval 0 on success.
+ * \retval -1 on error.
+ */
+int ast_bridge_channel_write_callback(struct ast_bridge_channel *bridge_channel, ast_bridge_custom_callback_fn callback, const void *payload, size_t payload_size);
+
+/*!
+ * \brief Queue a bridge action custom callback frame onto the bridge channel.
+ * \since 12.0.0
+ *
+ * \param bridge_channel Which channel to put the frame onto.
+ * \param callback Custom callback run on a bridge channel.
+ * \param payload Data to pass to the callback. (NULL if none).
+ * \param payload_size Size of the payload if payload is non-NULL. A number otherwise.
+ *
+ * \note The payload MUST NOT have any resources that need to be freed.
+ *
+ * \note This is intended to be called by bridge hooks.
+ *
+ * \retval 0 on success.
+ * \retval -1 on error.
+ */
+int ast_bridge_channel_queue_callback(struct ast_bridge_channel *bridge_channel, ast_bridge_custom_callback_fn callback, const void *payload, size_t payload_size);
+
+/*!
+ * \brief Have a bridge channel park a channel in the bridge
+ * \since 12.0.0
+ *
+ * \param bridge_channel Bridge channel performing the parking
+ * \param parkee_uuid Unique id of the channel we want to park
+ * \param parker_uuid Unique id of the channel parking the call
+ * \param app_data string indicating data used for park application (NULL allowed)
+ *
+ * \note This is intended to be called by bridge hooks.
+ *
+ * \retval 0 on success.
+ * \retval -1 on error.
+ */
+int ast_bridge_channel_write_park(struct ast_bridge_channel *bridge_channel, const char *parkee_uuid,
+ const char *parker_uuid, const char *app_data);
+
+/*!
+ * \brief Restore the formats of a bridge channel's channel to how they were before bridge_channel_join
+ * \since 12.0.0
+ *
+ * \param bridge_channel Channel to restore
+ */
+void ast_bridge_channel_restore_formats(struct ast_bridge_channel *bridge_channel);
+
+/*!
+ * \brief Get the peer bridge channel of a two party bridge.
+ * \since 12.0.0
+ *
+ * \param bridge_channel What to get the peer of.
+ *
+ * \note On entry, bridge_channel->bridge is already locked.
+ *
+ * \note This is an internal bridge function.
+ *
+ * \retval peer on success.
+ * \retval NULL no peer channel.
+ */
+struct ast_bridge_channel *ast_bridge_channel_peer(struct ast_bridge_channel *bridge_channel);
+
+#if defined(__cplusplus) || defined(c_plusplus)
+}
+#endif
+
+#endif /* _ASTERISK_BRIDGING_CHANNEL_H */
\ No newline at end of file
diff --git a/include/asterisk/bridging_channel_internal.h b/include/asterisk/bridging_channel_internal.h
new file mode 100644
index 0000000000..8f5eb4dd8f
--- /dev/null
+++ b/include/asterisk/bridging_channel_internal.h
@@ -0,0 +1,156 @@
+/*
+ * Asterisk -- An open source telephony toolkit.
+ *
+ * Copyright (C) 2013 Digium, Inc.
+ *
+ * Matt Jordan <mjordan@digium.com>
+ *
+ * See http://www.asterisk.org for more information about
+ * the Asterisk project. Please do not directly contact
+ * any of the maintainers of this project for assistance;
+ * the project provides a web site, mailing lists and IRC
+ * channels for your use.
+ *
+ * This program is free software, distributed under the terms of
+ * the GNU General Public License Version 2. See the LICENSE file
+ * at the top of the source tree.
+ */
+
+/*!
+ * \file
+ * \brief Private Bridging Channel API
+ *
+ * \author Matt Jordan <mjordan@digium.com>
+ *
+ * A private API to manipulate channels in a bridge. These can be called on a channel in
+ * a bridge by the bridging API, but should not be called by external consumers of the
+ * Bridging API.
+ *
+ * See Also:
+ * \arg \ref AstCREDITS
+ */
+
+#ifndef _ASTERISK_PRIVATE_BRIDGING_CHANNEL_H
+#define _ASTERISK_PRIVATE_BRIDGING_CHANNEL_H
+
+struct blind_transfer_data {
+ char exten[AST_MAX_EXTENSION];
+ char context[AST_MAX_CONTEXT];
+};
+
+/*!
+ * \brief Adjust the bridge_channel's bridge merge inhibit request count.
+ * \since 12.0.0
+ *
+ * \param bridge_channel What to operate on.
+ * \param request Inhibit request increment.
+ * (Positive to add requests. Negative to remove requests.)
+ *
+ * \note This API call is meant for internal bridging operations.
+ *
+ * \retval bridge adjusted merge inhibit with reference count.
+ */
+struct ast_bridge *bridge_channel_merge_inhibit(struct ast_bridge_channel *bridge_channel, int request);
+
+/*!
+ * \internal
+ * \brief Pull the bridge channel out of its current bridge.
+ * \since 12.0.0
+ *
+ * \param bridge_channel Channel to pull.
+ *
+ * \note On entry, bridge_channel->bridge is already locked.
+ *
+ * \return Nothing
+ */
+void bridge_channel_pull(struct ast_bridge_channel *bridge_channel);
+
+/*!
+ * \internal
+ * \brief Push the bridge channel into its specified bridge.
+ * \since 12.0.0
+ *
+ * \param bridge_channel Channel to push.
+ *
+ * \note On entry, bridge_channel->bridge is already locked.
+ *
+ * \retval 0 on success.
+ * \retval -1 on failure. The channel did not get pushed.
+ */
+int bridge_channel_push(struct ast_bridge_channel *bridge_channel);
+
+void bridge_channel_join(struct ast_bridge_channel *bridge_channel);
+
+void bridge_channel_suspend_nolock(struct ast_bridge_channel *bridge_channel);
+
+void bridge_channel_unsuspend_nolock(struct ast_bridge_channel *bridge_channel);
+
+/*!
+ * \internal
+ * \brief Update the linkedids for all channels in a bridge
+ * \since 12.0.0
+ *
+ * \param bridge_channel The channel joining the bridge
+ * \param swap The channel being swapped out of the bridge. May be NULL.
+ *
+ * \note The bridge must be locked prior to calling this function. This should be called
+ * during a \ref bridge_channel_push operation, typically by a sub-class of a bridge
+ */
+void bridge_channel_update_linkedids(struct ast_bridge_channel *bridge_channel, struct ast_bridge_channel *swap);
+
+/*!
+ * \internal
+ * \brief Update the accountcodes for a channel entering a bridge
+ * \since 12.0.0
+ *
+ * This function updates the accountcode and peeraccount on channels in two-party
+ * bridges. In multi-party bridges, peeraccount is not set - it doesn't make much sense -
+ * however accountcode propagation will still occur if the channel joining has an
+ * accountcode.
+ *
+ * \param bridge_channel The channel joining the bridge
+ * \param swap The channel being swapped out of the bridge. May be NULL.
+ *
+ * \note The bridge must be locked prior to calling this function. This should be called
+ * during a \ref bridge_channel_push operation, typically by a sub-class of a bridge
+ */
+void bridge_channel_update_accountcodes(struct ast_bridge_channel *bridge_channel, struct ast_bridge_channel *swap);
+
+
+/*!
+ * \brief Set bridge channel state to leave bridge (if not leaving already) with no lock.
+ *
+ * \param bridge_channel Channel to change the state on
+ * \param new_state The new state to place the channel into
+ *
+ * \note This API call is only meant to be used within the
+ * bridging module and hook callbacks to request the channel
+ * exit the bridge.
+ *
+ * \note This function assumes the bridge_channel is locked.
+ */
+void ast_bridge_change_state_nolock(struct ast_bridge_channel *bridge_channel, enum ast_bridge_channel_state new_state);
+
+/*!
+ * \brief Set bridge channel state to leave bridge (if not leaving already).
+ *
+ * \param bridge_channel Channel to change the state on
+ * \param new_state The new state to place the channel into
+ *
+ * Example usage:
+ *
+ * \code
+ * ast_bridge_change_state(bridge_channel, AST_BRIDGE_CHANNEL_STATE_HANGUP);
+ * \endcode
+ *
+ * This places the channel pointed to by bridge_channel into the
+ * state AST_BRIDGE_CHANNEL_STATE_HANGUP if it was
+ * AST_BRIDGE_CHANNEL_STATE_WAIT before.
+ *
+ * \note This API call is only meant to be used within the
+ * bridging module and hook callbacks to request the channel
+ * exit the bridge.
+ */
+void ast_bridge_change_state(struct ast_bridge_channel *bridge_channel, enum ast_bridge_channel_state new_state);
+
+#endif /* _ASTERISK_PRIVATE_BRIDGING_H */
\ No newline at end of file
diff --git a/include/asterisk/bridging_internal.h b/include/asterisk/bridging_internal.h
index 132c42b76a..cafa693f59 100644
--- a/include/asterisk/bridging_internal.h
+++ b/include/asterisk/bridging_internal.h
@@ -20,6 +20,11 @@
* \file
* \brief Private Bridging API
*
+ * Functions in this file are intended to be used by the Bridging API,
+ * bridge mixing technologies, and bridge sub-classes. Users of bridges
+ * that do not fit those three categories should *not* use the API
+ * defined in this file.
+ *
* \author Mark Michelson <mmichelson@digium.com>
*
* See Also:
@@ -32,6 +37,72 @@
struct ast_bridge;
struct ast_bridge_channel;
+/*!
+ * \brief Register the new bridge with the system.
+ * \since 12.0.0
+ *
+ * \param bridge What to register. (Tolerates a NULL pointer)
+ *
+ * \code
+ * struct ast_bridge *ast_bridge_basic_new(uint32_t capabilities, int flags, uint32 dtmf_features)
+ * {
+ * void *bridge;
+ *
+ * bridge = bridge_alloc(sizeof(struct ast_bridge_basic), &ast_bridge_basic_v_table);
+ * bridge = bridge_base_init(bridge, capabilities, flags);
+ * bridge = ast_bridge_basic_init(bridge, dtmf_features);
+ * bridge = bridge_register(bridge);
+ * return bridge;
+ * }
+ * \endcode
+ *
+ * \note This must be done after a bridge constructor has
+ * completed setting up the new bridge but before it returns.
+ *
+ * \note After a bridge is registered, ast_bridge_destroy() must
+ * eventually be called to get rid of the bridge.
+ *
+ * \retval bridge on success.
+ * \retval NULL on error.
+ */
+struct ast_bridge *bridge_register(struct ast_bridge *bridge);
+
+/*!
+ * \internal
+ * \brief Allocate the bridge class object memory.
+ * \since 12.0.0
+ *
+ * \param size Size of the bridge class structure to allocate.
+ * \param v_table Bridge class virtual method table.
+ *
+ * \retval bridge on success.
+ * \retval NULL on error.
+ */
+struct ast_bridge *bridge_alloc(size_t size, const struct ast_bridge_methods *v_table);
+
+/*!
+ * \brief Initialize the base class of the bridge.
+ *
+ * \param self Bridge to operate upon. (Tolerates a NULL pointer)
+ * \param capabilities The capabilities that we require to be used on the bridge
+ * \param flags Flags that will alter the behavior of the bridge
+ *
+ * \retval self on success
+ * \retval NULL on failure, self is already destroyed
+ *
+ * Example usage:
+ *
+ * \code
+ * struct ast_bridge *bridge;
+ * bridge = bridge_alloc(sizeof(*bridge), &ast_bridge_base_v_table);
+ * bridge = bridge_base_init(bridge, AST_BRIDGE_CAPABILITY_1TO1MIX, AST_BRIDGE_FLAG_DISSOLVE_HANGUP);
+ * \endcode
+ *
+ * This creates a no frills two party bridge that will be
+ * destroyed once one of the channels hangs up.
+ */
+struct ast_bridge *bridge_base_init(struct ast_bridge *self, uint32_t capabilities, unsigned int flags);
+
/*!
* \internal
* \brief Move a bridge channel from one bridge to another.
@@ -47,7 +118,7 @@ struct ast_bridge_channel;
* \retval 0 on success.
* \retval -1 on failure.
*/
-int bridge_move_do(struct ast_bridge *dst_bridge, struct ast_bridge_channel *bridge_channel,
+int bridge_do_move(struct ast_bridge *dst_bridge, struct ast_bridge_channel *bridge_channel,
int attempt_recovery, unsigned int optimized);
/*!
@@ -68,7 +139,7 @@ int bridge_move_do(struct ast_bridge *dst_bridge, struct ast_bridge_channel *bri
* This moves the channels in src_bridge into the bridge pointed
* to by dst_bridge.
*/
-void bridge_merge_do(struct ast_bridge *dst_bridge, struct ast_bridge *src_bridge,
+void bridge_do_merge(struct ast_bridge *dst_bridge, struct ast_bridge *src_bridge,
struct ast_bridge_channel **kick_me, unsigned int num_kick, unsigned int optimized);
/*!
@@ -83,6 +154,58 @@ void bridge_merge_do(struct ast_bridge *dst_bridge, struct ast_bridge *src_bridg
* \retval bridge_channel if channel is in the bridge.
* \retval NULL if not in bridge.
*/
-struct ast_bridge_channel *find_bridge_channel(struct ast_bridge *bridge, struct ast_channel *chan);
+struct ast_bridge_channel *bridge_find_channel(struct ast_bridge *bridge, struct ast_channel *chan);
+
+/*!
+ * \internal
+ * \brief Adjust the bridge merge inhibit request count.
+ * \since 12.0.0
+ *
+ * \param bridge What to operate on.
+ * \param request Inhibit request increment.
+ * (Positive to add requests. Negative to remove requests.)
+ *
+ * \note This function assumes bridge is locked.
+ *
+ * \return Nothing
+ */
+void bridge_merge_inhibit_nolock(struct ast_bridge *bridge, int request);
+
+/*!
+ * \internal
+ * \brief Notify the bridge that it has been reconfigured.
+ * \since 12.0.0
+ *
+ * \param bridge Reconfigured bridge.
+ * \param colp_update Whether to perform COLP updates.
+ *
+ * \details
+ * After a series of bridge_channel_push and
+ * bridge_channel_pull calls, you need to call this function
+ * to cause the bridge to complete restructuring for the change
+ * in the channel makeup of the bridge.
+ *
+ * \note On entry, the bridge is already locked.
+ *
+ * \return Nothing
+ */
+void bridge_reconfigured(struct ast_bridge *bridge, unsigned int colp_update);
+
+/*!
+ * \internal
+ * \brief Dissolve the bridge.
+ * \since 12.0.0
+ *
+ * \param bridge Bridge to eject all channels
+ *
+ * \details
+ * Force out all channels that are not already going out of the
+ * bridge. Any new channels joining will leave immediately.
+ *
+ * \note On entry, bridge is already locked.
+ *
+ * \return Nothing
+ */
+void bridge_dissolve(struct ast_bridge *bridge);
#endif /* _ASTERISK_PRIVATE_BRIDGING_H */
diff --git a/include/asterisk/bridging_technology.h b/include/asterisk/bridging_technology.h
index 4e680679e4..e037b7490e 100644
--- a/include/asterisk/bridging_technology.h
+++ b/include/asterisk/bridging_technology.h
@@ -41,6 +41,22 @@ enum ast_bridge_preference {
AST_BRIDGE_PREFERENCE_BASE_MULTIMIX = 10,
};
+/*!
+ * \brief Structure specific to bridge technologies capable of
+ * performing talking optimizations.
+ */
+struct ast_bridge_tech_optimizations {
+ /*! The amount of time in ms that talking must be detected before
+ * the dsp determines that talking has occurred */
+ unsigned int talking_threshold;
+ /*! The amount of time in ms that silence must be detected before
+ * the dsp determines that talking has stopped */
+ unsigned int silence_threshold;
+ /*! Whether or not the bridging technology should drop audio
+ * detected as silence from the mix. */
+ unsigned int drop_silence:1;
+};
+
/*!
* \brief Structure that is the essence of a bridge technology
*/
diff --git a/include/asterisk/channel.h b/include/asterisk/channel.h
index d8db4705d0..f6cdd4e628 100644
--- a/include/asterisk/channel.h
+++ b/include/asterisk/channel.h
@@ -4385,4 +4385,16 @@ int ast_channel_suppress(struct ast_channel *chan, unsigned int direction, enum
*/
int ast_channel_unsuppress(struct ast_channel *chan, unsigned int direction, enum ast_frame_type frametype);
+/*!
+ * \brief Simulate a DTMF end on a broken bridge channel.
+ *
+ * \param chan Channel sending DTMF that has not ended.
+ * \param digit DTMF digit to stop.
+ * \param start DTMF digit start time.
+ * \param why Reason bridge broken.
+ *
+ * \return Nothing
+ */
+void ast_channel_end_dtmf(struct ast_channel *chan, char digit, struct timeval start, const char *why);
+
#endif /* _ASTERISK_CHANNEL_H */
diff --git a/include/asterisk/features.h b/include/asterisk/features.h
index 162a7fc372..96eec98c86 100644
--- a/include/asterisk/features.h
+++ b/include/asterisk/features.h
@@ -146,25 +146,13 @@ int ast_masq_park_call(struct ast_channel *park_me, struct ast_channel *parker,
*/
int ast_masq_park_call_exten(struct ast_channel *park_me, struct ast_channel *parker, const char *park_exten, const char *park_context, int timeout, int *extout);
-/*!
+/*!
* \brief Determine if parking extension exists in a given context
* \retval 0 if extension does not exist
* \retval 1 if extension does exist
*/
int ast_parking_ext_valid(const char *exten_str, struct ast_channel *chan, const char *context);
-/*!
- * \brief Simulate a DTMF end on a broken bridge channel.
- *
- * \param chan Channel sending DTMF that has not ended.
- * \param digit DTMF digit to stop.
- * \param start DTMF digit start time.
- * \param why Reason bridge broken.
- *
- * \return Nothing
- */
-void ast_bridge_end_dtmf(struct ast_channel *chan, char digit, struct timeval start, const char *why);
-
/*! \brief Bridge a call, optionally allowing redirection */
int ast_bridge_call(struct ast_channel *chan, struct ast_channel *peer,struct ast_bridge_config *config);
diff --git a/main/bridging.c b/main/bridging.c
index fe38d4cac6..5f001d1f5e 100644
--- a/main/bridging.c
+++ b/main/bridging.c
@@ -18,7 +18,7 @@
/*! \file
*
- * \brief Channel Bridging API
+ * \brief Bridging API
*
* \author Joshua Colp <jcolp@digium.com>
*/
@@ -31,8 +31,6 @@
ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
-#include <signal.h>
-
#include "asterisk/logger.h"
#include "asterisk/channel.h"
#include "asterisk/options.h"
@@ -42,6 +40,7 @@ ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
#include "asterisk/bridging.h"
#include "asterisk/bridging_basic.h"
#include "asterisk/bridging_technology.h"
+#include "asterisk/bridging_channel.h"
#include "asterisk/stasis_bridging.h"
#include "asterisk/stasis_channels.h"
#include "asterisk/app.h"
@@ -62,8 +61,8 @@ ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
#include "asterisk/parking.h"
#include "asterisk/core_local.h"
#include "asterisk/core_unreal.h"
-#include "asterisk/features_config.h"
#include "asterisk/bridging_internal.h"
+#include "asterisk/bridging_channel_internal.h"
/*! All bridges container. */
static struct ao2_container *bridges;
@@ -204,62 +203,6 @@ int ast_bridge_technology_unregister(struct ast_bridge_technology *technology)
return current ? 0 : -1;
}
-void ast_bridge_channel_lock_bridge(struct ast_bridge_channel *bridge_channel)
-{
- struct ast_bridge *bridge;
-
- for (;;) {
- /* Safely get the bridge pointer */
- ast_bridge_channel_lock(bridge_channel);
- bridge = bridge_channel->bridge;
- ao2_ref(bridge, +1);
- ast_bridge_channel_unlock(bridge_channel);
-
- /* Lock the bridge and see if it is still the bridge we need to lock. */
- ast_bridge_lock(bridge);
- if (bridge == bridge_channel->bridge) {
- ao2_ref(bridge, -1);
- return;
- }
- ast_bridge_unlock(bridge);
- ao2_ref(bridge, -1);
- }
-}
-
-static void bridge_channel_poke(struct ast_bridge_channel *bridge_channel)
-{
- if (!pthread_equal(pthread_self(), bridge_channel->thread)) {
- while (bridge_channel->waiting) {
- pthread_kill(bridge_channel->thread, SIGURG);
- sched_yield();
- }
- }
-}
-
-void ast_bridge_change_state_nolock(struct ast_bridge_channel *bridge_channel, enum ast_bridge_channel_state new_state)
-{
-/* BUGBUG need cause code for the bridge_channel leaving the bridge. */
- if (bridge_channel->state != AST_BRIDGE_CHANNEL_STATE_WAIT) {
- return;
- }
-
- ast_debug(1, "Setting %p(%s) state from:%d to:%d\n",
- bridge_channel, ast_channel_name(bridge_channel->chan), bridge_channel->state,
- new_state);
-
- /* Change the state on the bridge channel */
- bridge_channel->state = new_state;
-
- bridge_channel_poke(bridge_channel);
-}
-
-void ast_bridge_change_state(struct ast_bridge_channel *bridge_channel, enum ast_bridge_channel_state new_state)
-{
- ast_bridge_channel_lock(bridge_channel);
- ast_bridge_change_state_nolock(bridge_channel, new_state);
- ast_bridge_channel_unlock(bridge_channel);
-}
-
/*!
* \internal
* \brief Put an action onto the specified bridge. Don't dup the action frame.
@@ -293,198 +236,6 @@ int ast_bridge_queue_action(struct ast_bridge *bridge, struct ast_frame *action)
return 0;
}
-void ast_bridge_update_accountcodes(struct ast_bridge *bridge, struct ast_bridge_channel *bridge_channel, struct ast_bridge_channel *swap)
-{
- struct ast_bridge_channel *other = NULL;
-
- AST_LIST_TRAVERSE(&bridge->channels, other, entry) {
- if (other == swap) {
- continue;
- }
-
- if (!ast_strlen_zero(ast_channel_accountcode(bridge_channel->chan)) && ast_strlen_zero(ast_channel_peeraccount(other->chan))) {
- ast_debug(1, "Setting peeraccount to %s for %s from data on channel %s\n",
- ast_channel_accountcode(bridge_channel->chan), ast_channel_name(other->chan), ast_channel_name(bridge_channel->chan));
- ast_channel_peeraccount_set(other->chan, ast_channel_accountcode(bridge_channel->chan));
- }
- if (!ast_strlen_zero(ast_channel_accountcode(other->chan)) && ast_strlen_zero(ast_channel_peeraccount(bridge_channel->chan))) {
- ast_debug(1, "Setting peeraccount to %s for %s from data on channel %s\n",
- ast_channel_accountcode(other->chan), ast_channel_name(bridge_channel->chan), ast_channel_name(other->chan));
- ast_channel_peeraccount_set(bridge_channel->chan, ast_channel_accountcode(other->chan));
- }
- if (!ast_strlen_zero(ast_channel_peeraccount(bridge_channel->chan)) && ast_strlen_zero(ast_channel_accountcode(other->chan))) {
- ast_debug(1, "Setting accountcode to %s for %s from data on channel %s\n",
- ast_channel_peeraccount(bridge_channel->chan), ast_channel_name(other->chan), ast_channel_name(bridge_channel->chan));
- ast_channel_accountcode_set(other->chan, ast_channel_peeraccount(bridge_channel->chan));
- }
- if (!ast_strlen_zero(ast_channel_peeraccount(other->chan)) && ast_strlen_zero(ast_channel_accountcode(bridge_channel->chan))) {
- ast_debug(1, "Setting accountcode to %s for %s from data on channel %s\n",
- ast_channel_peeraccount(other->chan), ast_channel_name(bridge_channel->chan), ast_channel_name(other->chan));
- ast_channel_accountcode_set(bridge_channel->chan, ast_channel_peeraccount(other->chan));
- }
- if (bridge->num_channels == 2) {
- if (strcmp(ast_channel_accountcode(bridge_channel->chan), ast_channel_peeraccount(other->chan))) {
- ast_debug(1, "Changing peeraccount from %s to %s on %s to match channel %s\n",
- ast_channel_peeraccount(other->chan), ast_channel_peeraccount(bridge_channel->chan), ast_channel_name(other->chan), ast_channel_name(bridge_channel->chan));
- ast_channel_peeraccount_set(other->chan, ast_channel_accountcode(bridge_channel->chan));
- }
- if (strcmp(ast_channel_accountcode(other->chan), ast_channel_peeraccount(bridge_channel->chan))) {
- ast_debug(1, "Changing peeraccount from %s to %s on %s to match channel %s\n",
- ast_channel_peeraccount(bridge_channel->chan), ast_channel_peeraccount(other->chan), ast_channel_name(bridge_channel->chan), ast_channel_name(other->chan));
- ast_channel_peeraccount_set(bridge_channel->chan, ast_channel_accountcode(other->chan));
- }
- }
- }
-}
-
-void ast_bridge_update_linkedids(struct ast_bridge *bridge, struct ast_bridge_channel *bridge_channel, struct ast_bridge_channel *swap)
-{
- struct ast_bridge_channel *other = NULL;
- const char *oldest_linkedid = ast_channel_linkedid(bridge_channel->chan);
-
- AST_LIST_TRAVERSE(&bridge->channels, other, entry) {
- if (other == swap) {
- continue;
- }
- oldest_linkedid = ast_channel_oldest_linkedid(oldest_linkedid, ast_channel_linkedid(other->chan));
- }
-
- if (ast_strlen_zero(oldest_linkedid)) {
- return;
- }
-
- ast_channel_linkedid_set(bridge_channel->chan, oldest_linkedid);
- AST_LIST_TRAVERSE(&bridge->channels, other, entry) {
- if (other == swap) {
- continue;
- }
- ast_channel_linkedid_set(other->chan, oldest_linkedid);
- }
-}
-
-int ast_bridge_channel_queue_frame(struct ast_bridge_channel *bridge_channel, struct ast_frame *fr)
-{
- struct ast_frame *dup;
- char nudge = 0;
-
- if (bridge_channel->suspended
- /* Also defer DTMF frames. */
- && fr->frametype != AST_FRAME_DTMF_BEGIN
- && fr->frametype != AST_FRAME_DTMF_END
- && !ast_is_deferrable_frame(fr)) {
- /* Drop non-deferable frames when suspended. */
- return 0;
- }
- if (fr->frametype == AST_FRAME_NULL) {
- /* "Accept" the frame and discard it. */
- return 0;
- }
-
- dup = ast_frdup(fr);
- if (!dup) {
- return -1;
- }
-
- ast_bridge_channel_lock(bridge_channel);
- if (bridge_channel->state != AST_BRIDGE_CHANNEL_STATE_WAIT) {
- /* Drop frames on channels leaving the bridge. */
- ast_bridge_channel_unlock(bridge_channel);
- ast_frfree(dup);
- return 0;
- }
-
- AST_LIST_INSERT_TAIL(&bridge_channel->wr_queue, dup, frame_list);
- if (write(bridge_channel->alert_pipe[1], &nudge, sizeof(nudge)) != sizeof(nudge)) {
- ast_log(LOG_ERROR, "We couldn't write alert pipe for %p(%s)... something is VERY wrong\n",
- bridge_channel, ast_channel_name(bridge_channel->chan));
- }
- ast_bridge_channel_unlock(bridge_channel);
- return 0;
-}
-
-int ast_bridge_channel_queue_action_data(struct ast_bridge_channel *bridge_channel, enum ast_bridge_action_type action, const void *data, size_t datalen)
-{
- struct ast_frame frame = {
- .frametype = AST_FRAME_BRIDGE_ACTION,
- .subclass.integer = action,
- .datalen = datalen,
- .data.ptr = (void *) data,
- };
-
- return ast_bridge_channel_queue_frame(bridge_channel, &frame);
-}
-
-int ast_bridge_channel_queue_control_data(struct ast_bridge_channel *bridge_channel, enum ast_control_frame_type control, const void *data, size_t datalen)
-{
- struct ast_frame frame = {
- .frametype = AST_FRAME_CONTROL,
- .subclass.integer = control,
- .datalen = datalen,
- .data.ptr = (void *) data,
- };
-
- return ast_bridge_channel_queue_frame(bridge_channel, &frame);
-}
-
-int ast_bridge_queue_everyone_else(struct ast_bridge *bridge, struct ast_bridge_channel *bridge_channel, struct ast_frame *frame)
-{
- struct ast_bridge_channel *cur;
- int not_written = -1;
-
- if (frame->frametype == AST_FRAME_NULL) {
- /* "Accept" the frame and discard it. */
- return 0;
- }
-
- AST_LIST_TRAVERSE(&bridge->channels, cur, entry) {
- if (cur == bridge_channel) {
- continue;
- }
- if (!ast_bridge_channel_queue_frame(cur, frame)) {
- not_written = 0;
- }
- }
- return not_written;
-}
-
-void ast_bridge_channel_restore_formats(struct ast_bridge_channel *bridge_channel)
-{
- /* Restore original formats of the channel as they came in */
- if (ast_format_cmp(ast_channel_readformat(bridge_channel->chan), &bridge_channel->read_format) == AST_FORMAT_CMP_NOT_EQUAL) {
- ast_debug(1, "Bridge is returning %p(%s) to read format %s\n",
- bridge_channel, ast_channel_name(bridge_channel->chan),
- ast_getformatname(&bridge_channel->read_format));
- if (ast_set_read_format(bridge_channel->chan, &bridge_channel->read_format)) {
- ast_debug(1, "Bridge failed to return %p(%s) to read format %s\n",
- bridge_channel, ast_channel_name(bridge_channel->chan),
- ast_getformatname(&bridge_channel->read_format));
- }
- }
- if (ast_format_cmp(ast_channel_writeformat(bridge_channel->chan), &bridge_channel->write_format) == AST_FORMAT_CMP_NOT_EQUAL) {
- ast_debug(1, "Bridge is returning %p(%s) to write format %s\n",
- bridge_channel, ast_channel_name(bridge_channel->chan),
- ast_getformatname(&bridge_channel->write_format));
- if (ast_set_write_format(bridge_channel->chan, &bridge_channel->write_format)) {
- ast_debug(1, "Bridge failed to return %p(%s) to write format %s\n",
- bridge_channel, ast_channel_name(bridge_channel->chan),
- ast_getformatname(&bridge_channel->write_format));
- }
- }
-}
-
-struct ast_bridge_channel *find_bridge_channel(struct ast_bridge *bridge, struct ast_channel *chan)
-{
- struct ast_bridge_channel *bridge_channel;
-
- AST_LIST_TRAVERSE(&bridge->channels, bridge_channel, entry) {
- if (bridge_channel->chan == chan) {
- break;
- }
- }
-
- return bridge_channel;
-}
-
/*!
* \internal
* \brief Dissolve the bridge.
@@ -500,7 +251,7 @@ struct ast_bridge_channel *find_bridge_channel(struct ast_bridge *bridge, struct
*
* \return Nothing
*/
-static void bridge_dissolve(struct ast_bridge *bridge)
+void bridge_dissolve(struct ast_bridge *bridge)
{
struct ast_bridge_channel *bridge_channel;
struct ast_frame action = {
@@ -524,49 +275,6 @@ static void bridge_dissolve(struct ast_bridge *bridge)
ast_bridge_queue_action(bridge, &action);
}
-/*!
- * \internal
- * \brief Check if a bridge should dissolve and do it.
- * \since 12.0.0
- *
- * \param bridge_channel Channel causing the check.
- *
- * \note On entry, bridge_channel->bridge is already locked.
- *
- * \return Nothing
- */
-static void bridge_dissolve_check(struct ast_bridge_channel *bridge_channel)
-{
- struct ast_bridge *bridge = bridge_channel->bridge;
-
- if (bridge->dissolved) {
- return;
- }
-
- if (!bridge->num_channels
- && ast_test_flag(&bridge->feature_flags, AST_BRIDGE_FLAG_DISSOLVE_EMPTY)) {
- /* Last channel leaving the bridge turns off the lights. */
- bridge_dissolve(bridge);
- return;
- }
-
- switch (bridge_channel->state) {
- case AST_BRIDGE_CHANNEL_STATE_END:
- /* Do we need to dissolve the bridge because this channel hung up? */
- if (ast_test_flag(&bridge->feature_flags, AST_BRIDGE_FLAG_DISSOLVE_HANGUP)
- || (bridge_channel->features->usable
- && ast_test_flag(&bridge_channel->features->feature_flags,
- AST_BRIDGE_CHANNEL_FLAG_DISSOLVE_HANGUP))) {
- bridge_dissolve(bridge);
- return;
- }
- break;
- default:
- break;
- }
-/* BUGBUG need to implement AST_BRIDGE_CHANNEL_FLAG_LONELY support here */
-}
-
/*!
* \internal
* \brief Check if a bridge should dissolve because of a stolen channel and do it.
@@ -651,2487 +359,1032 @@ static void bridge_reconfigured_connected_line_update(struct ast_bridge *bridge)
/*!
* \internal
- * \brief Pull the bridge channel out of its current bridge.
+ * \brief Complete joining a channel to the bridge.
* \since 12.0.0
*
- * \param bridge_channel Channel to pull.
+ * \param bridge What to operate upon.
+ * \param bridge_channel What is joining the bridge technology.
*
- * \note On entry, bridge_channel->bridge is already locked.
+ * \note On entry, bridge is already locked.
*
* \return Nothing
*/
-static void bridge_channel_pull(struct ast_bridge_channel *bridge_channel)
+static void bridge_channel_complete_join(struct ast_bridge *bridge, struct ast_bridge_channel *bridge_channel)
{
- struct ast_bridge *bridge = bridge_channel->bridge;
-
- if (!bridge_channel->in_bridge) {
- return;
- }
- bridge_channel->in_bridge = 0;
-
- ast_debug(1, "Bridge %s: pulling %p(%s)\n",
- bridge->uniqueid, bridge_channel, ast_channel_name(bridge_channel->chan));
-
- ast_verb(3, "Channel %s left '%s' %s-bridge <%s>\n",
- ast_channel_name(bridge_channel->chan),
- bridge->technology->name,
- bridge->v_table->name,
- bridge->uniqueid);
+ /* Make the channel compatible with the bridge */
+ bridge_make_compatible(bridge, bridge_channel);
-/* BUGBUG This is where incoming HOLD/UNHOLD memory should write UNHOLD into bridge. (if not local optimizing) */
-/* BUGBUG This is where incoming DTMF begin/end memory should write DTMF end into bridge. (if not local optimizing) */
- if (!bridge_channel->just_joined) {
- /* Tell the bridge technology we are leaving so they tear us down */
- ast_debug(1, "Bridge %s: %p(%s) is leaving %s technology\n",
+ /* Tell the bridge technology we are joining so they set us up */
+ ast_debug(1, "Bridge %s: %p(%s) is joining %s technology\n",
+ bridge->uniqueid, bridge_channel, ast_channel_name(bridge_channel->chan),
+ bridge->technology->name);
+ if (bridge->technology->join
+ && bridge->technology->join(bridge, bridge_channel)) {
+ ast_debug(1, "Bridge %s: %p(%s) failed to join %s technology\n",
bridge->uniqueid, bridge_channel, ast_channel_name(bridge_channel->chan),
bridge->technology->name);
- if (bridge->technology->leave) {
- bridge->technology->leave(bridge, bridge_channel);
- }
- }
-
- /* Remove channel from the bridge */
- if (!bridge_channel->suspended) {
- --bridge->num_active;
- }
- --bridge->num_channels;
- AST_LIST_REMOVE(&bridge->channels, bridge_channel, entry);
- bridge->v_table->pull(bridge, bridge_channel);
-
- ast_bridge_channel_clear_roles(bridge_channel);
-
- /* If we are not going to be hung up after leaving a bridge, and we were an
- * outgoing channel, clear the outgoing flag.
- */
- if (ast_test_flag(ast_channel_flags(bridge_channel->chan), AST_FLAG_OUTGOING)
- && (ast_channel_softhangup_internal_flag(bridge_channel->chan) &
- (AST_SOFTHANGUP_ASYNCGOTO | AST_SOFTHANGUP_UNBRIDGE))) {
- ast_clear_flag(ast_channel_flags(bridge_channel->chan), AST_FLAG_OUTGOING);
+ bridge_channel->just_joined = 1;
+ return;
}
- bridge_dissolve_check(bridge_channel);
-
- bridge->reconfigured = 1;
- ast_bridge_publish_leave(bridge, bridge_channel->chan);
+ bridge_channel->just_joined = 0;
}
/*!
* \internal
- * \brief Push the bridge channel into its specified bridge.
+ * \brief Complete joining new channels to the bridge.
* \since 12.0.0
*
- * \param bridge_channel Channel to push.
+ * \param bridge Check for new channels on this bridge.
*
- * \note On entry, bridge_channel->bridge is already locked.
+ * \note On entry, bridge is already locked.
*
- * \retval 0 on success.
- * \retval -1 on failure. The channel did not get pushed.
+ * \return Nothing
*/
-static int bridge_channel_push(struct ast_bridge_channel *bridge_channel)
+static void bridge_complete_join(struct ast_bridge *bridge)
{
- struct ast_bridge *bridge = bridge_channel->bridge;
- struct ast_bridge_channel *swap;
-
- ast_assert(!bridge_channel->in_bridge);
-
- swap = find_bridge_channel(bridge, bridge_channel->swap);
- bridge_channel->swap = NULL;
+ struct ast_bridge_channel *bridge_channel;
- if (swap) {
- ast_debug(1, "Bridge %s: pushing %p(%s) by swapping with %p(%s)\n",
- bridge->uniqueid, bridge_channel, ast_channel_name(bridge_channel->chan),
- swap, ast_channel_name(swap->chan));
- } else {
- ast_debug(1, "Bridge %s: pushing %p(%s)\n",
- bridge->uniqueid, bridge_channel, ast_channel_name(bridge_channel->chan));
+ if (bridge->dissolved) {
+ /*
+ * No sense in completing the join on channels for a dissolved
+ * bridge. They are just going to be removed soon anyway.
+ * However, we do have reason to abort here because the bridge
+ * technology may not be able to handle the number of channels
+ * still in the bridge.
+ */
+ return;
}
- /* Add channel to the bridge */
- if (bridge->dissolved
- || bridge_channel->state != AST_BRIDGE_CHANNEL_STATE_WAIT
- || (swap && swap->state != AST_BRIDGE_CHANNEL_STATE_WAIT)
- || bridge->v_table->push(bridge, bridge_channel, swap)
- || ast_bridge_channel_establish_roles(bridge_channel)) {
- ast_debug(1, "Bridge %s: pushing %p(%s) into bridge failed\n",
- bridge->uniqueid, bridge_channel, ast_channel_name(bridge_channel->chan));
- ast_bridge_features_remove(bridge_channel->features, AST_BRIDGE_HOOK_REMOVE_ON_PULL);
- return -1;
- }
- bridge_channel->in_bridge = 1;
- bridge_channel->just_joined = 1;
- AST_LIST_INSERT_TAIL(&bridge->channels, bridge_channel, entry);
- ++bridge->num_channels;
- if (!bridge_channel->suspended) {
- ++bridge->num_active;
+ AST_LIST_TRAVERSE(&bridge->channels, bridge_channel, entry) {
+ if (!bridge_channel->just_joined) {
+ continue;
+ }
+ bridge_channel_complete_join(bridge, bridge_channel);
}
+}
- ast_verb(3, "Channel %s %s%s%s '%s' %s-bridge <%s>\n",
- ast_channel_name(bridge_channel->chan),
- swap ? "swapped with " : "joined",
- swap ? ast_channel_name(swap->chan) : "",
- swap ? " into" : "",
- bridge->technology->name,
- bridge->v_table->name,
- bridge->uniqueid);
+/*! \brief Helper function used to find the "best" bridge technology given specified capabilities */
+static struct ast_bridge_technology *find_best_technology(uint32_t capabilities, struct ast_bridge *bridge)
+{
+ struct ast_bridge_technology *current;
+ struct ast_bridge_technology *best = NULL;
- ast_bridge_publish_enter(bridge, bridge_channel->chan);
- if (swap) {
- ast_bridge_change_state(swap, AST_BRIDGE_CHANNEL_STATE_HANGUP);
- bridge_channel_pull(swap);
+ AST_RWLIST_RDLOCK(&bridge_technologies);
+ AST_RWLIST_TRAVERSE(&bridge_technologies, current, entry) {
+ if (current->suspended) {
+ ast_debug(1, "Bridge technology %s is suspended. Skipping.\n",
+ current->name);
+ continue;
+ }
+ if (!(current->capabilities & capabilities)) {
+ ast_debug(1, "Bridge technology %s does not have any capabilities we want.\n",
+ current->name);
+ continue;
+ }
+ if (best && current->preference <= best->preference) {
+ ast_debug(1, "Bridge technology %s has less preference than %s (%d <= %d). Skipping.\n",
+ current->name, best->name, current->preference, best->preference);
+ continue;
+ }
+ if (current->compatible && !current->compatible(bridge)) {
+ ast_debug(1, "Bridge technology %s is not compatible with properties of existing bridge.\n",
+ current->name);
+ continue;
+ }
+ best = current;
}
- /* Clear any BLINDTRANSFER and ATTENDEDTRANSFER since the transfer has completed. */
- pbx_builtin_setvar_helper(bridge_channel->chan, "BLINDTRANSFER", NULL);
- pbx_builtin_setvar_helper(bridge_channel->chan, "ATTENDEDTRANSFER", NULL);
+ if (best) {
+ /* Increment it's module reference count if present so it does not get unloaded while in use */
+ ast_module_ref(best->mod);
+ ast_debug(1, "Chose bridge technology %s\n", best->name);
+ }
- bridge->reconfigured = 1;
- return 0;
+ AST_RWLIST_UNLOCK(&bridge_technologies);
+
+ return best;
}
-/*! \brief Internal function to handle DTMF from a channel */
-static struct ast_frame *bridge_handle_dtmf(struct ast_bridge_channel *bridge_channel, struct ast_frame *frame)
-{
- struct ast_bridge_features *features = bridge_channel->features;
- struct ast_bridge_hook *hook;
- char dtmf[2];
-
-/* BUGBUG the feature hook matching needs to be done here. Any matching feature hook needs to be queued onto the bridge_channel. Also the feature hook digit timeout needs to be handled. */
-/* BUGBUG the AMI atxfer action just sends DTMF end events to initiate DTMF atxfer and dial the extension. Another reason the DTMF hook matching needs rework. */
- /* See if this DTMF matches the beginnings of any feature hooks, if so we switch to the feature state to either execute the feature or collect more DTMF */
- dtmf[0] = frame->subclass.integer;
- dtmf[1] = '\0';
- hook = ao2_find(features->dtmf_hooks, dtmf, OBJ_PARTIAL_KEY);
- if (hook) {
- struct ast_frame action = {
- .frametype = AST_FRAME_BRIDGE_ACTION,
- .subclass.integer = AST_BRIDGE_ACTION_FEATURE,
- };
+struct tech_deferred_destroy {
+ struct ast_bridge_technology *tech;
+ void *tech_pvt;
+};
- ast_frfree(frame);
- frame = NULL;
- ast_bridge_channel_queue_frame(bridge_channel, &action);
- ao2_ref(hook, -1);
- }
+/*!
+ * \internal
+ * \brief Deferred destruction of bridge tech private structure.
+ * \since 12.0.0
+ *
+ * \param bridge What to execute the action on.
+ * \param action Deferred bridge tech destruction.
+ *
+ * \note On entry, bridge must not be locked.
+ *
+ * \return Nothing
+ */
+static void bridge_tech_deferred_destroy(struct ast_bridge *bridge, struct ast_frame *action)
+{
+ struct tech_deferred_destroy *deferred = action->data.ptr;
+ struct ast_bridge dummy_bridge = {
+ .technology = deferred->tech,
+ .tech_pvt = deferred->tech_pvt,
+ };
- return frame;
+ ast_copy_string(dummy_bridge.uniqueid, bridge->uniqueid, sizeof(dummy_bridge.uniqueid));
+ ast_debug(1, "Bridge %s: calling %s technology destructor (deferred, dummy)\n",
+ dummy_bridge.uniqueid, dummy_bridge.technology->name);
+ dummy_bridge.technology->destroy(&dummy_bridge);
+ ast_module_unref(dummy_bridge.technology->mod);
}
/*!
* \internal
- * \brief Handle bridge hangup event.
+ * \brief Handle bridge action frame.
* \since 12.0.0
*
- * \param bridge_channel Which channel is hanging up.
+ * \param bridge What to execute the action on.
+ * \param action What to do.
+ *
+ * \note On entry, bridge is already locked.
+ * \note Can be called by the bridge destructor.
*
* \return Nothing
*/
-static void bridge_handle_hangup(struct ast_bridge_channel *bridge_channel)
+static void bridge_action_bridge(struct ast_bridge *bridge, struct ast_frame *action)
{
- struct ast_bridge_features *features = bridge_channel->features;
- struct ast_bridge_hook *hook;
- struct ao2_iterator iter;
-
- /* Run any hangup hooks. */
- iter = ao2_iterator_init(features->hangup_hooks, 0);
- for (; (hook = ao2_iterator_next(&iter)); ao2_ref(hook, -1)) {
- int remove_me;
+#if 0 /* In case we need to know when the destructor is calling us. */
+ int in_destructor = !ao2_ref(bridge, 0);
+#endif
- remove_me = hook->callback(bridge_channel->bridge, bridge_channel, hook->hook_pvt);
- if (remove_me) {
- ast_debug(1, "Hangup hook %p is being removed from %p(%s)\n",
- hook, bridge_channel, ast_channel_name(bridge_channel->chan));
- ao2_unlink(features->hangup_hooks, hook);
- }
+ switch (action->subclass.integer) {
+ case AST_BRIDGE_ACTION_DEFERRED_TECH_DESTROY:
+ ast_bridge_unlock(bridge);
+ bridge_tech_deferred_destroy(bridge, action);
+ ast_bridge_lock(bridge);
+ break;
+ case AST_BRIDGE_ACTION_DEFERRED_DISSOLVING:
+ ast_bridge_unlock(bridge);
+ bridge->v_table->dissolving(bridge);
+ ast_bridge_lock(bridge);
+ break;
+ default:
+ /* Unexpected deferred action type. Should never happen. */
+ ast_assert(0);
+ break;
}
- ao2_iterator_destroy(&iter);
-
- /* Default hangup action. */
- ast_bridge_change_state(bridge_channel, AST_BRIDGE_CHANNEL_STATE_END);
}
-static int bridge_channel_interval_ready(struct ast_bridge_channel *bridge_channel)
+/*!
+ * \internal
+ * \brief Do any pending bridge actions.
+ * \since 12.0.0
+ *
+ * \param bridge What to do actions on.
+ *
+ * \note On entry, bridge is already locked.
+ * \note Can be called by the bridge destructor.
+ *
+ * \return Nothing
+ */
+static void bridge_handle_actions(struct ast_bridge *bridge)
{
- struct ast_bridge_features *features = bridge_channel->features;
- struct ast_bridge_hook *hook;
- int ready;
-
- ast_heap_wrlock(features->interval_hooks);
- hook = ast_heap_peek(features->interval_hooks, 1);
- ready = hook && ast_tvdiff_ms(hook->parms.timer.trip_time, ast_tvnow()) <= 0;
- ast_heap_unlock(features->interval_hooks);
+ struct ast_frame *action;
- return ready;
+ while ((action = AST_LIST_REMOVE_HEAD(&bridge->action_queue, frame_list))) {
+ switch (action->frametype) {
+ case AST_FRAME_BRIDGE_ACTION:
+ bridge_action_bridge(bridge, action);
+ break;
+ default:
+ /* Unexpected deferred frame type. Should never happen. */
+ ast_assert(0);
+ break;
+ }
+ ast_frfree(action);
+ }
}
-int ast_bridge_notify_talking(struct ast_bridge_channel *bridge_channel, int started_talking)
+static struct stasis_message *create_bridge_snapshot_message(struct ast_bridge *bridge)
{
- struct ast_frame action = {
- .frametype = AST_FRAME_BRIDGE_ACTION,
- .subclass.integer = started_talking
- ? AST_BRIDGE_ACTION_TALKING_START : AST_BRIDGE_ACTION_TALKING_STOP,
- };
+ RAII_VAR(struct ast_bridge_snapshot *, snapshot, NULL, ao2_cleanup);
- return ast_bridge_channel_queue_frame(bridge_channel, &action);
+ snapshot = ast_bridge_snapshot_create(bridge);
+ if (!snapshot) {
+ return NULL;
+ }
+
+ return stasis_message_create(ast_bridge_snapshot_type(), snapshot);
}
-static int bridge_channel_write_frame(struct ast_bridge_channel *bridge_channel, struct ast_frame *frame)
+static void destroy_bridge(void *obj)
{
- ast_bridge_channel_lock_bridge(bridge_channel);
-/*
- * BUGBUG need to implement a deferred write queue for when there is no peer channel in the bridge (yet or it was kicked).
- *
- * The tech decides if a frame needs to be pushed back for deferral.
- * simple_bridge/native_bridge are likely the only techs that will do this.
- */
- bridge_channel->bridge->technology->write(bridge_channel->bridge, bridge_channel, frame);
- ast_bridge_unlock(bridge_channel->bridge);
+ struct ast_bridge *bridge = obj;
- /*
- * Claim successful write to bridge. If deferred frame
- * support is added, claim successfully deferred.
- */
- return 0;
-}
+ ast_debug(1, "Bridge %s: actually destroying %s bridge, nobody wants it anymore\n",
+ bridge->uniqueid, bridge->v_table->name);
-int ast_bridge_channel_write_action_data(struct ast_bridge_channel *bridge_channel, enum ast_bridge_action_type action, const void *data, size_t datalen)
-{
- struct ast_frame frame = {
- .frametype = AST_FRAME_BRIDGE_ACTION,
- .subclass.integer = action,
- .datalen = datalen,
- .data.ptr = (void *) data,
- };
+ if (bridge->construction_completed) {
+ RAII_VAR(struct stasis_message *, clear_msg, NULL, ao2_cleanup);
- return bridge_channel_write_frame(bridge_channel, &frame);
-}
+ clear_msg = create_bridge_snapshot_message(bridge);
+ if (clear_msg) {
+ RAII_VAR(struct stasis_message *, msg, NULL, ao2_cleanup);
-int ast_bridge_channel_write_control_data(struct ast_bridge_channel *bridge_channel, enum ast_control_frame_type control, const void *data, size_t datalen)
-{
- struct ast_frame frame = {
- .frametype = AST_FRAME_CONTROL,
- .subclass.integer = control,
- .datalen = datalen,
- .data.ptr = (void *) data,
- };
+ msg = stasis_cache_clear_create(clear_msg);
+ if (msg) {
+ stasis_publish(ast_bridge_topic(bridge), msg);
+ }
+ }
+ }
- return bridge_channel_write_frame(bridge_channel, &frame);
-}
+ /* Do any pending actions in the context of destruction. */
+ ast_bridge_lock(bridge);
+ bridge_handle_actions(bridge);
+ ast_bridge_unlock(bridge);
-int ast_bridge_channel_write_hold(struct ast_bridge_channel *bridge_channel, const char *moh_class)
-{
- RAII_VAR(struct ast_json *, blob, NULL, ast_json_unref);
- size_t datalen;
+ /* There should not be any channels left in the bridge. */
+ ast_assert(AST_LIST_EMPTY(&bridge->channels));
- if (!ast_strlen_zero(moh_class)) {
- datalen = strlen(moh_class) + 1;
+ ast_debug(1, "Bridge %s: calling %s bridge destructor\n",
+ bridge->uniqueid, bridge->v_table->name);
+ bridge->v_table->destroy(bridge);
- blob = ast_json_pack("{s: s}",
- "musicclass", moh_class);
- } else {
- moh_class = NULL;
- datalen = 0;
+ /* Pass off the bridge to the technology to destroy if needed */
+ if (bridge->technology) {
+ ast_debug(1, "Bridge %s: calling %s technology stop\n",
+ bridge->uniqueid, bridge->technology->name);
+ if (bridge->technology->stop) {
+ ast_bridge_lock(bridge);
+ bridge->technology->stop(bridge);
+ ast_bridge_unlock(bridge);
+ }
+ ast_debug(1, "Bridge %s: calling %s technology destructor\n",
+ bridge->uniqueid, bridge->technology->name);
+ if (bridge->technology->destroy) {
+ bridge->technology->destroy(bridge);
+ }
+ ast_module_unref(bridge->technology->mod);
+ bridge->technology = NULL;
}
- ast_channel_publish_blob(bridge_channel->chan, ast_channel_hold_type(), blob);
- return ast_bridge_channel_write_control_data(bridge_channel, AST_CONTROL_HOLD,
- moh_class, datalen);
+ if (bridge->callid) {
+ bridge->callid = ast_callid_unref(bridge->callid);
+ }
+
+ cleanup_video_mode(bridge);
}
-int ast_bridge_channel_write_unhold(struct ast_bridge_channel *bridge_channel)
+struct ast_bridge *bridge_register(struct ast_bridge *bridge)
{
- ast_channel_publish_blob(bridge_channel->chan, ast_channel_unhold_type(), NULL);
- return ast_bridge_channel_write_control_data(bridge_channel, AST_CONTROL_UNHOLD, NULL, 0);
+ if (bridge) {
+ bridge->construction_completed = 1;
+ ast_bridge_publish_state(bridge);
+ if (!ao2_link(bridges, bridge)) {
+ ast_bridge_destroy(bridge);
+ bridge = NULL;
+ }
+ }
+ return bridge;
}
-static int run_app_helper(struct ast_channel *chan, const char *app_name, const char *app_args)
+struct ast_bridge *bridge_alloc(size_t size, const struct ast_bridge_methods *v_table)
{
- int res = 0;
+ struct ast_bridge *bridge;
- if (!strcasecmp("Gosub", app_name)) {
- ast_app_exec_sub(NULL, chan, app_args, 0);
- } else if (!strcasecmp("Macro", app_name)) {
- ast_app_exec_macro(NULL, chan, app_args);
- } else {
- struct ast_app *app;
+ /* Check v_table that all methods are present. */
+ if (!v_table
+ || !v_table->name
+ || !v_table->destroy
+ || !v_table->dissolving
+ || !v_table->push
+ || !v_table->pull
+ || !v_table->notify_masquerade
+ || !v_table->get_merge_priority) {
+ ast_log(LOG_ERROR, "Virtual method table for bridge class %s not complete.\n",
+ v_table && v_table->name ? v_table->name : "<unknown>");
+ ast_assert(0);
+ return NULL;
+ }
- app = pbx_findapp(app_name);
- if (!app) {
- ast_log(LOG_WARNING, "Could not find application (%s)\n", app_name);
- } else {
- res = pbx_exec(chan, app, app_args);
- }
+ bridge = ao2_alloc(size, destroy_bridge);
+ if (bridge) {
+ bridge->v_table = v_table;
}
- return res;
+ return bridge;
}
-void ast_bridge_channel_run_app(struct ast_bridge_channel *bridge_channel, const char *app_name, const char *app_args, const char *moh_class)
+struct ast_bridge *bridge_base_init(struct ast_bridge *self, uint32_t capabilities, unsigned int flags)
{
- if (moh_class) {
- ast_bridge_channel_write_hold(bridge_channel, moh_class);
+ if (!self) {
+ return NULL;
}
- if (run_app_helper(bridge_channel->chan, app_name, S_OR(app_args, ""))) {
- /* Break the bridge if the app returns non-zero. */
- bridge_handle_hangup(bridge_channel);
+
+ ast_uuid_generate_str(self->uniqueid, sizeof(self->uniqueid));
+ ast_set_flag(&self->feature_flags, flags);
+ self->allowed_capabilities = capabilities;
+
+ /* Use our helper function to find the "best" bridge technology. */
+ self->technology = find_best_technology(capabilities, self);
+ if (!self->technology) {
+ ast_log(LOG_WARNING, "Bridge %s: Could not create class %s. No technology to support it.\n",
+ self->uniqueid, self->v_table->name);
+ ao2_ref(self, -1);
+ return NULL;
}
- if (moh_class) {
- ast_bridge_channel_write_unhold(bridge_channel);
+
+ /* Pass off the bridge to the technology to manipulate if needed */
+ ast_debug(1, "Bridge %s: calling %s technology constructor\n",
+ self->uniqueid, self->technology->name);
+ if (self->technology->create && self->technology->create(self)) {
+ ast_log(LOG_WARNING, "Bridge %s: failed to setup bridge technology %s\n",
+ self->uniqueid, self->technology->name);
+ ao2_ref(self, -1);
+ return NULL;
+ }
+ ast_debug(1, "Bridge %s: calling %s technology start\n",
+ self->uniqueid, self->technology->name);
+ if (self->technology->start && self->technology->start(self)) {
+ ast_log(LOG_WARNING, "Bridge %s: failed to start bridge technology %s\n",
+ self->uniqueid, self->technology->name);
+ ao2_ref(self, -1);
+ return NULL;
}
-}
-struct bridge_run_app {
- /*! Offset into app_name[] where the MOH class name starts. (zero if no MOH) */
- int moh_offset;
- /*! Offset into app_name[] where the application argument string starts. (zero if no arguments) */
- int app_args_offset;
- /*! Application name to run. */
- char app_name[0];
-};
+ if (!ast_bridge_topic(self)) {
+ ao2_ref(self, -1);
+ return NULL;
+ }
+
+ return self;
+}
/*!
* \internal
- * \brief Handle the run application bridge action.
+ * \brief ast_bridge base class destructor.
* \since 12.0.0
*
- * \param bridge_channel Which channel to run the application on.
- * \param data Action frame data to run the application.
+ * \param self Bridge to operate upon.
+ *
+ * \note Stub because of nothing to do.
*
* \return Nothing
*/
-static void bridge_channel_run_app(struct ast_bridge_channel *bridge_channel, struct bridge_run_app *data)
+static void bridge_base_destroy(struct ast_bridge *self)
{
- ast_bridge_channel_run_app(bridge_channel, data->app_name,
- data->app_args_offset ? &data->app_name[data->app_args_offset] : NULL,
- data->moh_offset ? &data->app_name[data->moh_offset] : NULL);
}
-static int payload_helper_app(ast_bridge_channel_post_action_data post_it,
- struct ast_bridge_channel *bridge_channel, const char *app_name, const char *app_args, const char *moh_class)
+/*!
+ * \internal
+ * \brief The bridge is being dissolved.
+ * \since 12.0.0
+ *
+ * \param self Bridge to operate upon.
+ *
+ * \return Nothing
+ */
+static void bridge_base_dissolving(struct ast_bridge *self)
{
- struct bridge_run_app *app_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 = !moh_class ? 0 : strlen(moh_class) + 1;
- size_t len_data = sizeof(*app_data) + len_name + len_args + len_moh;
+ ao2_unlink(bridges, self);
+}
- /* Fill in application run frame data. */
- app_data = alloca(len_data);
- app_data->app_args_offset = len_args ? len_name : 0;
- app_data->moh_offset = len_moh ? len_name + len_args : 0;
- strcpy(app_data->app_name, app_name);/* Safe */
- if (len_args) {
- strcpy(&app_data->app_name[app_data->app_args_offset], app_args);/* Safe */
- }
- if (moh_class) {
- strcpy(&app_data->app_name[app_data->moh_offset], moh_class);/* Safe */
- }
-
- return post_it(bridge_channel, AST_BRIDGE_ACTION_RUN_APP, app_data, len_data);
-}
-
-int ast_bridge_channel_write_app(struct ast_bridge_channel *bridge_channel, const char *app_name, const char *app_args, const char *moh_class)
-{
- return payload_helper_app(ast_bridge_channel_write_action_data,
- bridge_channel, app_name, app_args, moh_class);
-}
-
-int ast_bridge_channel_queue_app(struct ast_bridge_channel *bridge_channel, const char *app_name, const char *app_args, const char *moh_class)
-{
- return payload_helper_app(ast_bridge_channel_queue_action_data,
- bridge_channel, app_name, app_args, moh_class);
-}
-
-void ast_bridge_channel_playfile(struct ast_bridge_channel *bridge_channel, ast_bridge_custom_play_fn custom_play, const char *playfile, const char *moh_class)
+/*!
+ * \internal
+ * \brief ast_bridge base push method.
+ * \since 12.0.0
+ *
+ * \param self Bridge to operate upon.
+ * \param bridge_channel Bridge channel to push.
+ * \param swap Bridge channel to swap places with if not NULL.
+ *
+ * \note On entry, self is already locked.
+ * \note Stub because of nothing to do.
+ *
+ * \retval 0 on success
+ * \retval -1 on failure
+ */
+static int bridge_base_push(struct ast_bridge *self, struct ast_bridge_channel *bridge_channel, struct ast_bridge_channel *swap)
{
- if (moh_class) {
- ast_bridge_channel_write_hold(bridge_channel, moh_class);
- }
- if (custom_play) {
- custom_play(bridge_channel, playfile);
- } else {
- ast_stream_and_wait(bridge_channel->chan, playfile, AST_DIGIT_NONE);
- }
- if (moh_class) {
- ast_bridge_channel_write_unhold(bridge_channel);
- }
-
- /*
- * It may be necessary to resume music on hold after we finish
- * playing the announcment.
- *
- * XXX We have no idea what MOH class was in use before playing
- * the file. This method also fails to restore ringing indications.
- * the proposed solution is to create a resume_entertainment callback
- * for the bridge technology and execute it here.
- */
- if (ast_test_flag(ast_channel_flags(bridge_channel->chan), AST_FLAG_MOH)) {
- ast_moh_start(bridge_channel->chan, NULL, NULL);
- }
+ return 0;
}
-struct bridge_playfile {
- /*! Call this function to play the playfile. (NULL if normal sound file to play) */
- ast_bridge_custom_play_fn custom_play;
- /*! Offset into playfile[] where the MOH class name starts. (zero if no MOH)*/
- int moh_offset;
- /*! Filename to play. */
- char playfile[0];
-};
-
/*!
* \internal
- * \brief Handle the playfile bridge action.
+ * \brief ast_bridge base pull method.
* \since 12.0.0
*
- * \param bridge_channel Which channel to play a file on.
- * \param payload Action frame payload to play a file.
+ * \param self Bridge to operate upon.
+ * \param bridge_channel Bridge channel to pull.
+ *
+ * \note On entry, self is already locked.
*
* \return Nothing
*/
-static void bridge_channel_playfile(struct ast_bridge_channel *bridge_channel, struct bridge_playfile *payload)
-{
- ast_bridge_channel_playfile(bridge_channel, payload->custom_play, payload->playfile,
- payload->moh_offset ? &payload->playfile[payload->moh_offset] : NULL);
-}
-
-static int payload_helper_playfile(ast_bridge_channel_post_action_data post_it,
- struct ast_bridge_channel *bridge_channel, ast_bridge_custom_play_fn custom_play, const char *playfile, const char *moh_class)
-{
- struct bridge_playfile *payload;
- size_t len_name = strlen(playfile) + 1;
- size_t len_moh = !moh_class ? 0 : strlen(moh_class) + 1;
- size_t len_payload = sizeof(*payload) + len_name + len_moh;
-
- /* Fill in play file frame data. */
- payload = alloca(len_payload);
- payload->custom_play = custom_play;
- payload->moh_offset = len_moh ? len_name : 0;
- strcpy(payload->playfile, playfile);/* Safe */
- if (moh_class) {
- strcpy(&payload->playfile[payload->moh_offset], moh_class);/* Safe */
- }
-
- return post_it(bridge_channel, AST_BRIDGE_ACTION_PLAY_FILE, payload, len_payload);
-}
-
-int ast_bridge_channel_write_playfile(struct ast_bridge_channel *bridge_channel, ast_bridge_custom_play_fn custom_play, const char *playfile, const char *moh_class)
-{
- return payload_helper_playfile(ast_bridge_channel_write_action_data,
- bridge_channel, custom_play, playfile, moh_class);
-}
-
-int ast_bridge_channel_queue_playfile(struct ast_bridge_channel *bridge_channel, ast_bridge_custom_play_fn custom_play, const char *playfile, const char *moh_class)
+static void bridge_base_pull(struct ast_bridge *self, struct ast_bridge_channel *bridge_channel)
{
- return payload_helper_playfile(ast_bridge_channel_queue_action_data,
- bridge_channel, custom_play, playfile, moh_class);
+ ast_bridge_features_remove(bridge_channel->features, AST_BRIDGE_HOOK_REMOVE_ON_PULL);
}
-struct bridge_custom_callback {
- /*! Call this function on the bridge channel thread. */
- ast_bridge_custom_callback_fn callback;
- /*! Size of the payload if it exists. A number otherwise. */
- size_t payload_size;
- /*! Nonzero if the payload exists. */
- char payload_exists;
- /*! Payload to give to callback. */
- char payload[0];
-};
-
/*!
* \internal
- * \brief Handle the do custom callback bridge action.
+ * \brief ast_bridge base notify_masquerade method.
* \since 12.0.0
*
- * \param bridge_channel Which channel to run the application on.
- * \param data Action frame data to run the application.
+ * \param self Bridge to operate upon.
+ * \param bridge_channel Bridge channel that was masqueraded.
+ *
+ * \note On entry, self is already locked.
*
* \return Nothing
*/
-static void bridge_channel_do_callback(struct ast_bridge_channel *bridge_channel, struct bridge_custom_callback *data)
-{
- data->callback(bridge_channel, data->payload_exists ? data->payload : NULL, data->payload_size);
-}
-
-static int payload_helper_cb(ast_bridge_channel_post_action_data post_it,
- struct ast_bridge_channel *bridge_channel, ast_bridge_custom_callback_fn callback, const void *payload, size_t payload_size)
-{
- struct bridge_custom_callback *cb_data;
- size_t len_data = sizeof(*cb_data) + (payload ? payload_size : 0);
-
- /* Sanity check. */
- if (!callback) {
- ast_assert(0);
- return -1;
- }
-
- /* Fill in custom callback frame data. */
- cb_data = alloca(len_data);
- cb_data->callback = callback;
- cb_data->payload_size = payload_size;
- cb_data->payload_exists = payload && payload_size;
- if (cb_data->payload_exists) {
- memcpy(cb_data->payload, payload, payload_size);/* Safe */
- }
-
- return post_it(bridge_channel, AST_BRIDGE_ACTION_CALLBACK, cb_data, len_data);
-}
-
-int ast_bridge_channel_write_callback(struct ast_bridge_channel *bridge_channel, ast_bridge_custom_callback_fn callback, const void *payload, size_t payload_size)
+static void bridge_base_notify_masquerade(struct ast_bridge *self, struct ast_bridge_channel *bridge_channel)
{
- return payload_helper_cb(ast_bridge_channel_write_action_data,
- bridge_channel, callback, payload, payload_size);
+ self->reconfigured = 1;
}
-int ast_bridge_channel_queue_callback(struct ast_bridge_channel *bridge_channel, ast_bridge_custom_callback_fn callback, const void *payload, size_t payload_size)
+/*!
+ * \internal
+ * \brief Get the merge priority of this bridge.
+ * \since 12.0.0
+ *
+ * \param self Bridge to operate upon.
+ *
+ * \note On entry, self is already locked.
+ *
+ * \return Merge priority
+ */
+static int bridge_base_get_merge_priority(struct ast_bridge *self)
{
- return payload_helper_cb(ast_bridge_channel_queue_action_data,
- bridge_channel, callback, payload, payload_size);
+ return 0;
}
-struct bridge_park {
- int parker_uuid_offset;
- int app_data_offset;
- /* buffer used for holding those strings */
- char parkee_uuid[0];
+struct ast_bridge_methods ast_bridge_base_v_table = {
+ .name = "base",
+ .destroy = bridge_base_destroy,
+ .dissolving = bridge_base_dissolving,
+ .push = bridge_base_push,
+ .pull = bridge_base_pull,
+ .notify_masquerade = bridge_base_notify_masquerade,
+ .get_merge_priority = bridge_base_get_merge_priority,
};
-static void bridge_channel_park(struct ast_bridge_channel *bridge_channel, struct bridge_park *payload)
+struct ast_bridge *ast_bridge_base_new(uint32_t capabilities, unsigned int flags)
{
- ast_bridge_channel_park(bridge_channel, payload->parkee_uuid,
- &payload->parkee_uuid[payload->parker_uuid_offset],
- payload->app_data_offset ? &payload->parkee_uuid[payload->app_data_offset] : NULL);
+ void *bridge;
+
+ bridge = bridge_alloc(sizeof(struct ast_bridge), &ast_bridge_base_v_table);
+ bridge = bridge_base_init(bridge, capabilities, flags);
+ bridge = bridge_register(bridge);
+ return bridge;
}
-static int payload_helper_park(ast_bridge_channel_post_action_data post_it,
- struct ast_bridge_channel *bridge_channel,
- const char *parkee_uuid,
- const char *parker_uuid,
- const char *app_data)
+int ast_bridge_destroy(struct ast_bridge *bridge)
{
- struct bridge_park *payload;
- size_t len_parkee_uuid = strlen(parkee_uuid) + 1;
- size_t len_parker_uuid = strlen(parker_uuid) + 1;
- size_t len_app_data = !app_data ? 0 : strlen(app_data) + 1;
- size_t len_payload = sizeof(*payload) + len_parker_uuid + len_parkee_uuid + len_app_data;
+ ast_debug(1, "Bridge %s: telling all channels to leave the party\n", bridge->uniqueid);
+ ast_bridge_lock(bridge);
+ bridge_dissolve(bridge);
+ ast_bridge_unlock(bridge);
- payload = alloca(len_payload);
- payload->app_data_offset = len_app_data ? len_parkee_uuid + len_parker_uuid : 0;
- payload->parker_uuid_offset = len_parkee_uuid;
- strcpy(payload->parkee_uuid, parkee_uuid);
- strcpy(&payload->parkee_uuid[payload->parker_uuid_offset], parker_uuid);
- if (app_data) {
- strcpy(&payload->parkee_uuid[payload->app_data_offset], app_data);
- }
+ ao2_ref(bridge, -1);
- return post_it(bridge_channel, AST_BRIDGE_ACTION_PARK, payload, len_payload);
+ return 0;
}
-int ast_bridge_channel_write_park(struct ast_bridge_channel *bridge_channel, const char *parkee_uuid, const char *parker_uuid, const char *app_data)
+static int bridge_make_compatible(struct ast_bridge *bridge, struct ast_bridge_channel *bridge_channel)
{
- return payload_helper_park(ast_bridge_channel_write_action_data,
- bridge_channel, parkee_uuid, parker_uuid, app_data);
-}
+ struct ast_format read_format;
+ struct ast_format write_format;
+ struct ast_format best_format;
+ char codec_buf[512];
-/*!
- * \internal
- * \brief Feed notification that a frame is waiting on a channel into the bridging core
- *
- * \param bridge_channel Bridge channel the notification was received on
- */
-static void bridge_handle_trip(struct ast_bridge_channel *bridge_channel)
-{
- struct ast_frame *frame;
+ ast_format_copy(&read_format, ast_channel_readformat(bridge_channel->chan));
+ ast_format_copy(&write_format, ast_channel_writeformat(bridge_channel->chan));
- if (bridge_channel->features->mute) {
- frame = ast_read_noaudio(bridge_channel->chan);
- } else {
- frame = ast_read(bridge_channel->chan);
- }
+ /* Are the formats currently in use something this bridge can handle? */
+ if (!ast_format_cap_iscompatible(bridge->technology->format_capabilities, ast_channel_readformat(bridge_channel->chan))) {
+ ast_best_codec(bridge->technology->format_capabilities, &best_format);
- if (!frame) {
- bridge_handle_hangup(bridge_channel);
- return;
- }
- switch (frame->frametype) {
- case AST_FRAME_CONTROL:
- switch (frame->subclass.integer) {
- case AST_CONTROL_HANGUP:
- bridge_handle_hangup(bridge_channel);
- ast_frfree(frame);
- return;
-/* BUGBUG This is where incoming HOLD/UNHOLD memory should register. Write UNHOLD into bridge when this channel is pulled. */
- default:
- break;
- }
- break;
- case AST_FRAME_DTMF_BEGIN:
- frame = bridge_handle_dtmf(bridge_channel, frame);
- if (!frame) {
- return;
- }
- /* Fall through */
- case AST_FRAME_DTMF_END:
- if (!bridge_channel->features->dtmf_passthrough) {
- ast_frfree(frame);
- return;
+ /* Read format is a no go... */
+ ast_debug(1, "Bridge technology %s wants to read any of formats %s but channel has %s\n",
+ bridge->technology->name,
+ ast_getformatname_multiple(codec_buf, sizeof(codec_buf), bridge->technology->format_capabilities),
+ ast_getformatname(&read_format));
+
+ /* Switch read format to the best one chosen */
+ if (ast_set_read_format(bridge_channel->chan, &best_format)) {
+ ast_log(LOG_WARNING, "Failed to set channel %s to read format %s\n",
+ ast_channel_name(bridge_channel->chan), ast_getformatname(&best_format));
+ return -1;
}
-/* BUGBUG This is where incoming DTMF begin/end memory should register. Write DTMF end into bridge when this channel is pulled. */
- break;
- default:
- break;
+ ast_debug(1, "Bridge %s put channel %s into read format %s\n",
+ bridge->uniqueid, ast_channel_name(bridge_channel->chan),
+ ast_getformatname(&best_format));
+ } else {
+ ast_debug(1, "Bridge %s is happy that channel %s already has read format %s\n",
+ bridge->uniqueid, ast_channel_name(bridge_channel->chan),
+ ast_getformatname(&read_format));
}
- /* Simply write the frame out to the bridge technology. */
-/* BUGBUG The tech is where AST_CONTROL_ANSWER hook should go. (early bridge) */
-/* BUGBUG The tech is where incoming BUSY/CONGESTION hangup should happen? (early bridge) */
- bridge_channel_write_frame(bridge_channel, frame);
- ast_frfree(frame);
-}
+ if (!ast_format_cap_iscompatible(bridge->technology->format_capabilities, &write_format)) {
+ ast_best_codec(bridge->technology->format_capabilities, &best_format);
-/*!
- * \internal
- * \brief Complete joining a channel to the bridge.
- * \since 12.0.0
- *
- * \param bridge What to operate upon.
- * \param bridge_channel What is joining the bridge technology.
- *
- * \note On entry, bridge is already locked.
- *
- * \return Nothing
- */
-static void bridge_channel_complete_join(struct ast_bridge *bridge, struct ast_bridge_channel *bridge_channel)
-{
- /* Make the channel compatible with the bridge */
- bridge_make_compatible(bridge, bridge_channel);
+ /* Write format is a no go... */
+ ast_debug(1, "Bridge technology %s wants to write any of formats %s but channel has %s\n",
+ bridge->technology->name,
+ ast_getformatname_multiple(codec_buf, sizeof(codec_buf), bridge->technology->format_capabilities),
+ ast_getformatname(&write_format));
- /* Tell the bridge technology we are joining so they set us up */
- ast_debug(1, "Bridge %s: %p(%s) is joining %s technology\n",
- bridge->uniqueid, bridge_channel, ast_channel_name(bridge_channel->chan),
- bridge->technology->name);
- if (bridge->technology->join
- && bridge->technology->join(bridge, bridge_channel)) {
- ast_debug(1, "Bridge %s: %p(%s) failed to join %s technology\n",
- bridge->uniqueid, bridge_channel, ast_channel_name(bridge_channel->chan),
- bridge->technology->name);
- bridge_channel->just_joined = 1;
- return;
+ /* Switch write format to the best one chosen */
+ if (ast_set_write_format(bridge_channel->chan, &best_format)) {
+ ast_log(LOG_WARNING, "Failed to set channel %s to write format %s\n",
+ ast_channel_name(bridge_channel->chan), ast_getformatname(&best_format));
+ return -1;
+ }
+ ast_debug(1, "Bridge %s put channel %s into write format %s\n",
+ bridge->uniqueid, ast_channel_name(bridge_channel->chan),
+ ast_getformatname(&best_format));
+ } else {
+ ast_debug(1, "Bridge %s is happy that channel %s already has write format %s\n",
+ bridge->uniqueid, ast_channel_name(bridge_channel->chan),
+ ast_getformatname(&write_format));
}
- bridge_channel->just_joined = 0;
+ return 0;
}
/*!
* \internal
- * \brief Complete joining new channels to the bridge.
+ * \brief Perform the smart bridge operation.
* \since 12.0.0
*
- * \param bridge Check for new channels on this bridge.
+ * \param bridge Work on this bridge.
+ *
+ * \details
+ * Basically see if a new bridge technology should be used instead
+ * of the current one.
*
* \note On entry, bridge is already locked.
*
- * \return Nothing
+ * \retval 0 on success.
+ * \retval -1 on error.
*/
-static void bridge_complete_join(struct ast_bridge *bridge)
+static int smart_bridge_operation(struct ast_bridge *bridge)
{
+ uint32_t new_capabilities;
+ struct ast_bridge_technology *new_technology;
+ struct ast_bridge_technology *old_technology = bridge->technology;
struct ast_bridge_channel *bridge_channel;
+ struct ast_frame *deferred_action;
+ struct ast_bridge dummy_bridge = {
+ .technology = bridge->technology,
+ .tech_pvt = bridge->tech_pvt,
+ };
if (bridge->dissolved) {
- /*
- * No sense in completing the join on channels for a dissolved
- * bridge. They are just going to be removed soon anyway.
- * However, we do have reason to abort here because the bridge
- * technology may not be able to handle the number of channels
- * still in the bridge.
- */
- return;
- }
-
- AST_LIST_TRAVERSE(&bridge->channels, bridge_channel, entry) {
- if (!bridge_channel->just_joined) {
- continue;
- }
- bridge_channel_complete_join(bridge, bridge_channel);
+ ast_debug(1, "Bridge %s is dissolved, not performing smart bridge operation.\n",
+ bridge->uniqueid);
+ return 0;
}
-}
-/*! \brief Helper function used to find the "best" bridge technology given specified capabilities */
-static struct ast_bridge_technology *find_best_technology(uint32_t capabilities, struct ast_bridge *bridge)
-{
- struct ast_bridge_technology *current;
- struct ast_bridge_technology *best = NULL;
-
- AST_RWLIST_RDLOCK(&bridge_technologies);
- AST_RWLIST_TRAVERSE(&bridge_technologies, current, entry) {
- if (current->suspended) {
- ast_debug(1, "Bridge technology %s is suspended. Skipping.\n",
- current->name);
- continue;
- }
- if (!(current->capabilities & capabilities)) {
- ast_debug(1, "Bridge technology %s does not have any capabilities we want.\n",
- current->name);
- continue;
- }
- if (best && current->preference <= best->preference) {
- ast_debug(1, "Bridge technology %s has less preference than %s (%d <= %d). Skipping.\n",
- current->name, best->name, current->preference, best->preference);
- continue;
- }
- if (current->compatible && !current->compatible(bridge)) {
- ast_debug(1, "Bridge technology %s is not compatible with properties of existing bridge.\n",
- current->name);
- continue;
- }
- best = current;
- }
-
- if (best) {
- /* Increment it's module reference count if present so it does not get unloaded while in use */
- ast_module_ref(best->mod);
- ast_debug(1, "Chose bridge technology %s\n", best->name);
- }
-
- AST_RWLIST_UNLOCK(&bridge_technologies);
-
- return best;
-}
-
-struct tech_deferred_destroy {
- struct ast_bridge_technology *tech;
- void *tech_pvt;
-};
-
-/*!
- * \internal
- * \brief Deferred destruction of bridge tech private structure.
- * \since 12.0.0
- *
- * \param bridge What to execute the action on.
- * \param action Deferred bridge tech destruction.
- *
- * \note On entry, bridge must not be locked.
- *
- * \return Nothing
- */
-static void bridge_tech_deferred_destroy(struct ast_bridge *bridge, struct ast_frame *action)
-{
- struct tech_deferred_destroy *deferred = action->data.ptr;
- struct ast_bridge dummy_bridge = {
- .technology = deferred->tech,
- .tech_pvt = deferred->tech_pvt,
- };
-
- ast_copy_string(dummy_bridge.uniqueid, bridge->uniqueid, sizeof(dummy_bridge.uniqueid));
- ast_debug(1, "Bridge %s: calling %s technology destructor (deferred, dummy)\n",
- dummy_bridge.uniqueid, dummy_bridge.technology->name);
- dummy_bridge.technology->destroy(&dummy_bridge);
- ast_module_unref(dummy_bridge.technology->mod);
-}
-
-/*!
- * \internal
- * \brief Handle bridge action frame.
- * \since 12.0.0
- *
- * \param bridge What to execute the action on.
- * \param action What to do.
- *
- * \note On entry, bridge is already locked.
- * \note Can be called by the bridge destructor.
- *
- * \return Nothing
- */
-static void bridge_action_bridge(struct ast_bridge *bridge, struct ast_frame *action)
-{
-#if 0 /* In case we need to know when the destructor is calling us. */
- int in_destructor = !ao2_ref(bridge, 0);
-#endif
-
- switch (action->subclass.integer) {
- case AST_BRIDGE_ACTION_DEFERRED_TECH_DESTROY:
- ast_bridge_unlock(bridge);
- bridge_tech_deferred_destroy(bridge, action);
- ast_bridge_lock(bridge);
- break;
- case AST_BRIDGE_ACTION_DEFERRED_DISSOLVING:
- ast_bridge_unlock(bridge);
- bridge->v_table->dissolving(bridge);
- ast_bridge_lock(bridge);
- break;
- default:
- /* Unexpected deferred action type. Should never happen. */
- ast_assert(0);
- break;
- }
-}
-
-/*!
- * \internal
- * \brief Do any pending bridge actions.
- * \since 12.0.0
- *
- * \param bridge What to do actions on.
- *
- * \note On entry, bridge is already locked.
- * \note Can be called by the bridge destructor.
- *
- * \return Nothing
- */
-static void bridge_handle_actions(struct ast_bridge *bridge)
-{
- struct ast_frame *action;
-
- while ((action = AST_LIST_REMOVE_HEAD(&bridge->action_queue, frame_list))) {
- switch (action->frametype) {
- case AST_FRAME_BRIDGE_ACTION:
- bridge_action_bridge(bridge, action);
- break;
- default:
- /* Unexpected deferred frame type. Should never happen. */
- ast_assert(0);
- break;
- }
- ast_frfree(action);
- }
-}
-
-static struct stasis_message *create_bridge_snapshot_message(struct ast_bridge *bridge)
-{
- RAII_VAR(struct ast_bridge_snapshot *, snapshot, NULL, ao2_cleanup);
-
- snapshot = ast_bridge_snapshot_create(bridge);
- if (!snapshot) {
- return NULL;
- }
-
- return stasis_message_create(ast_bridge_snapshot_type(), snapshot);
-}
-
-static void destroy_bridge(void *obj)
-{
- struct ast_bridge *bridge = obj;
-
- ast_debug(1, "Bridge %s: actually destroying %s bridge, nobody wants it anymore\n",
- bridge->uniqueid, bridge->v_table->name);
-
- if (bridge->construction_completed) {
- RAII_VAR(struct stasis_message *, clear_msg, NULL, ao2_cleanup);
-
- clear_msg = create_bridge_snapshot_message(bridge);
- if (clear_msg) {
- RAII_VAR(struct stasis_message *, msg, NULL, ao2_cleanup);
-
- msg = stasis_cache_clear_create(clear_msg);
- if (msg) {
- stasis_publish(ast_bridge_topic(bridge), msg);
- }
- }
- }
-
- /* Do any pending actions in the context of destruction. */
- ast_bridge_lock(bridge);
- bridge_handle_actions(bridge);
- ast_bridge_unlock(bridge);
-
- /* There should not be any channels left in the bridge. */
- ast_assert(AST_LIST_EMPTY(&bridge->channels));
-
- ast_debug(1, "Bridge %s: calling %s bridge destructor\n",
- bridge->uniqueid, bridge->v_table->name);
- bridge->v_table->destroy(bridge);
-
- /* Pass off the bridge to the technology to destroy if needed */
- if (bridge->technology) {
- ast_debug(1, "Bridge %s: calling %s technology stop\n",
- bridge->uniqueid, bridge->technology->name);
- if (bridge->technology->stop) {
- ast_bridge_lock(bridge);
- bridge->technology->stop(bridge);
- ast_bridge_unlock(bridge);
- }
- ast_debug(1, "Bridge %s: calling %s technology destructor\n",
- bridge->uniqueid, bridge->technology->name);
- if (bridge->technology->destroy) {
- bridge->technology->destroy(bridge);
- }
- ast_module_unref(bridge->technology->mod);
- bridge->technology = NULL;
- }
-
- if (bridge->callid) {
- bridge->callid = ast_callid_unref(bridge->callid);
- }
-
- cleanup_video_mode(bridge);
-}
-
-struct ast_bridge *ast_bridge_register(struct ast_bridge *bridge)
-{
- if (bridge) {
- bridge->construction_completed = 1;
- ast_bridge_publish_state(bridge);
- if (!ao2_link(bridges, bridge)) {
- ast_bridge_destroy(bridge);
- bridge = NULL;
- }
- }
- return bridge;
-}
-
-struct ast_bridge *ast_bridge_alloc(size_t size, const struct ast_bridge_methods *v_table)
-{
- struct ast_bridge *bridge;
-
- /* Check v_table that all methods are present. */
- if (!v_table
- || !v_table->name
- || !v_table->destroy
- || !v_table->dissolving
- || !v_table->push
- || !v_table->pull
- || !v_table->notify_masquerade
- || !v_table->get_merge_priority) {
- ast_log(LOG_ERROR, "Virtual method table for bridge class %s not complete.\n",
- v_table && v_table->name ? v_table->name : "<unknown>");
- ast_assert(0);
- return NULL;
- }
-
- bridge = ao2_alloc(size, destroy_bridge);
- if (bridge) {
- bridge->v_table = v_table;
- }
- return bridge;
-}
-
-struct ast_bridge *ast_bridge_base_init(struct ast_bridge *self, uint32_t capabilities, unsigned int flags)
-{
- if (!self) {
- return NULL;
- }
-
- ast_uuid_generate_str(self->uniqueid, sizeof(self->uniqueid));
- ast_set_flag(&self->feature_flags, flags);
- self->allowed_capabilities = capabilities;
-
- /* Use our helper function to find the "best" bridge technology. */
- self->technology = find_best_technology(capabilities, self);
- if (!self->technology) {
- ast_log(LOG_WARNING, "Bridge %s: Could not create class %s. No technology to support it.\n",
- self->uniqueid, self->v_table->name);
- ao2_ref(self, -1);
- return NULL;
- }
-
- /* Pass off the bridge to the technology to manipulate if needed */
- ast_debug(1, "Bridge %s: calling %s technology constructor\n",
- self->uniqueid, self->technology->name);
- if (self->technology->create && self->technology->create(self)) {
- ast_log(LOG_WARNING, "Bridge %s: failed to setup bridge technology %s\n",
- self->uniqueid, self->technology->name);
- ao2_ref(self, -1);
- return NULL;
- }
- ast_debug(1, "Bridge %s: calling %s technology start\n",
- self->uniqueid, self->technology->name);
- if (self->technology->start && self->technology->start(self)) {
- ast_log(LOG_WARNING, "Bridge %s: failed to start bridge technology %s\n",
- self->uniqueid, self->technology->name);
- ao2_ref(self, -1);
- return NULL;
- }
-
- if (!ast_bridge_topic(self)) {
- ao2_ref(self, -1);
- return NULL;
- }
-
- return self;
-}
-
-/*!
- * \internal
- * \brief ast_bridge base class destructor.
- * \since 12.0.0
- *
- * \param self Bridge to operate upon.
- *
- * \note Stub because of nothing to do.
- *
- * \return Nothing
- */
-static void bridge_base_destroy(struct ast_bridge *self)
-{
-}
-
-/*!
- * \internal
- * \brief The bridge is being dissolved.
- * \since 12.0.0
- *
- * \param self Bridge to operate upon.
- *
- * \return Nothing
- */
-static void bridge_base_dissolving(struct ast_bridge *self)
-{
- ao2_unlink(bridges, self);
-}
-
-/*!
- * \internal
- * \brief ast_bridge base push method.
- * \since 12.0.0
- *
- * \param self Bridge to operate upon.
- * \param bridge_channel Bridge channel to push.
- * \param swap Bridge channel to swap places with if not NULL.
- *
- * \note On entry, self is already locked.
- * \note Stub because of nothing to do.
- *
- * \retval 0 on success
- * \retval -1 on failure
- */
-static int bridge_base_push(struct ast_bridge *self, struct ast_bridge_channel *bridge_channel, struct ast_bridge_channel *swap)
-{
- return 0;
-}
-
-/*!
- * \internal
- * \brief ast_bridge base pull method.
- * \since 12.0.0
- *
- * \param self Bridge to operate upon.
- * \param bridge_channel Bridge channel to pull.
- *
- * \note On entry, self is already locked.
- *
- * \return Nothing
- */
-static void bridge_base_pull(struct ast_bridge *self, struct ast_bridge_channel *bridge_channel)
-{
- ast_bridge_features_remove(bridge_channel->features, AST_BRIDGE_HOOK_REMOVE_ON_PULL);
-}
-
-/*!
- * \internal
- * \brief ast_bridge base notify_masquerade method.
- * \since 12.0.0
- *
- * \param self Bridge to operate upon.
- * \param bridge_channel Bridge channel that was masqueraded.
- *
- * \note On entry, self is already locked.
- *
- * \return Nothing
- */
-static void bridge_base_notify_masquerade(struct ast_bridge *self, struct ast_bridge_channel *bridge_channel)
-{
- self->reconfigured = 1;
-}
-
-/*!
- * \internal
- * \brief Get the merge priority of this bridge.
- * \since 12.0.0
- *
- * \param self Bridge to operate upon.
- *
- * \note On entry, self is already locked.
- *
- * \return Merge priority
- */
-static int bridge_base_get_merge_priority(struct ast_bridge *self)
-{
- return 0;
-}
-
-struct ast_bridge_methods ast_bridge_base_v_table = {
- .name = "base",
- .destroy = bridge_base_destroy,
- .dissolving = bridge_base_dissolving,
- .push = bridge_base_push,
- .pull = bridge_base_pull,
- .notify_masquerade = bridge_base_notify_masquerade,
- .get_merge_priority = bridge_base_get_merge_priority,
-};
-
-struct ast_bridge *ast_bridge_base_new(uint32_t capabilities, unsigned int flags)
-{
- void *bridge;
-
- bridge = ast_bridge_alloc(sizeof(struct ast_bridge), &ast_bridge_base_v_table);
- bridge = ast_bridge_base_init(bridge, capabilities, flags);
- bridge = ast_bridge_register(bridge);
- return bridge;
-}
-
-int ast_bridge_destroy(struct ast_bridge *bridge)
-{
- ast_debug(1, "Bridge %s: telling all channels to leave the party\n", bridge->uniqueid);
- ast_bridge_lock(bridge);
- bridge_dissolve(bridge);
- ast_bridge_unlock(bridge);
-
- ao2_ref(bridge, -1);
-
- return 0;
-}
-
-static int bridge_make_compatible(struct ast_bridge *bridge, struct ast_bridge_channel *bridge_channel)
-{
- struct ast_format read_format;
- struct ast_format write_format;
- struct ast_format best_format;
- char codec_buf[512];
-
- ast_format_copy(&read_format, ast_channel_readformat(bridge_channel->chan));
- ast_format_copy(&write_format, ast_channel_writeformat(bridge_channel->chan));
-
- /* Are the formats currently in use something this bridge can handle? */
- if (!ast_format_cap_iscompatible(bridge->technology->format_capabilities, ast_channel_readformat(bridge_channel->chan))) {
- ast_best_codec(bridge->technology->format_capabilities, &best_format);
-
- /* Read format is a no go... */
- ast_debug(1, "Bridge technology %s wants to read any of formats %s but channel has %s\n",
- bridge->technology->name,
- ast_getformatname_multiple(codec_buf, sizeof(codec_buf), bridge->technology->format_capabilities),
- ast_getformatname(&read_format));
-
- /* Switch read format to the best one chosen */
- if (ast_set_read_format(bridge_channel->chan, &best_format)) {
- ast_log(LOG_WARNING, "Failed to set channel %s to read format %s\n",
- ast_channel_name(bridge_channel->chan), ast_getformatname(&best_format));
- return -1;
- }
- ast_debug(1, "Bridge %s put channel %s into read format %s\n",
- bridge->uniqueid, ast_channel_name(bridge_channel->chan),
- ast_getformatname(&best_format));
- } else {
- ast_debug(1, "Bridge %s is happy that channel %s already has read format %s\n",
- bridge->uniqueid, ast_channel_name(bridge_channel->chan),
- ast_getformatname(&read_format));
- }
-
- if (!ast_format_cap_iscompatible(bridge->technology->format_capabilities, &write_format)) {
- ast_best_codec(bridge->technology->format_capabilities, &best_format);
-
- /* Write format is a no go... */
- ast_debug(1, "Bridge technology %s wants to write any of formats %s but channel has %s\n",
- bridge->technology->name,
- ast_getformatname_multiple(codec_buf, sizeof(codec_buf), bridge->technology->format_capabilities),
- ast_getformatname(&write_format));
-
- /* Switch write format to the best one chosen */
- if (ast_set_write_format(bridge_channel->chan, &best_format)) {
- ast_log(LOG_WARNING, "Failed to set channel %s to write format %s\n",
- ast_channel_name(bridge_channel->chan), ast_getformatname(&best_format));
- return -1;
- }
- ast_debug(1, "Bridge %s put channel %s into write format %s\n",
- bridge->uniqueid, ast_channel_name(bridge_channel->chan),
- ast_getformatname(&best_format));
- } else {
- ast_debug(1, "Bridge %s is happy that channel %s already has write format %s\n",
- bridge->uniqueid, ast_channel_name(bridge_channel->chan),
- ast_getformatname(&write_format));
- }
-
- return 0;
-}
-
-/*!
- * \internal
- * \brief Perform the smart bridge operation.
- * \since 12.0.0
- *
- * \param bridge Work on this bridge.
- *
- * \details
- * Basically see if a new bridge technology should be used instead
- * of the current one.
- *
- * \note On entry, bridge is already locked.
- *
- * \retval 0 on success.
- * \retval -1 on error.
- */
-static int smart_bridge_operation(struct ast_bridge *bridge)
-{
- uint32_t new_capabilities;
- struct ast_bridge_technology *new_technology;
- struct ast_bridge_technology *old_technology = bridge->technology;
- struct ast_bridge_channel *bridge_channel;
- struct ast_frame *deferred_action;
- struct ast_bridge dummy_bridge = {
- .technology = bridge->technology,
- .tech_pvt = bridge->tech_pvt,
- };
-
- if (bridge->dissolved) {
- ast_debug(1, "Bridge %s is dissolved, not performing smart bridge operation.\n",
- bridge->uniqueid);
- return 0;
- }
-
- /* Determine new bridge technology capabilities needed. */
- if (2 < bridge->num_channels) {
- new_capabilities = AST_BRIDGE_CAPABILITY_MULTIMIX;
- new_capabilities &= bridge->allowed_capabilities;
- } else {
- new_capabilities = AST_BRIDGE_CAPABILITY_NATIVE | AST_BRIDGE_CAPABILITY_1TO1MIX;
- new_capabilities &= bridge->allowed_capabilities;
- if (!new_capabilities
- && (bridge->allowed_capabilities & AST_BRIDGE_CAPABILITY_MULTIMIX)) {
- /* Allow switching between different multimix bridge technologies. */
- new_capabilities = AST_BRIDGE_CAPABILITY_MULTIMIX;
- }
- }
-
- /* Find a bridge technology to satisfy the new capabilities. */
- new_technology = find_best_technology(new_capabilities, bridge);
- if (!new_technology) {
- int is_compatible = 0;
-
- if (old_technology->compatible) {
- is_compatible = old_technology->compatible(bridge);
- } else if (old_technology->capabilities & AST_BRIDGE_CAPABILITY_MULTIMIX) {
- is_compatible = 1;
- } else if (bridge->num_channels <= 2
- && (old_technology->capabilities & AST_BRIDGE_CAPABILITY_1TO1MIX)) {
- is_compatible = 1;
- }
-
- if (is_compatible) {
- ast_debug(1, "Bridge %s could not get a new technology, staying with old technology.\n",
- bridge->uniqueid);
- return 0;
- }
- ast_log(LOG_WARNING, "Bridge %s has no technology available to support it.\n",
- bridge->uniqueid);
- return -1;
- }
- if (new_technology == old_technology) {
- ast_debug(1, "Bridge %s is already using the new technology.\n",
- bridge->uniqueid);
- ast_module_unref(old_technology->mod);
- return 0;
- }
-
- ast_copy_string(dummy_bridge.uniqueid, bridge->uniqueid, sizeof(dummy_bridge.uniqueid));
-
- if (old_technology->destroy) {
- struct tech_deferred_destroy deferred_tech_destroy = {
- .tech = dummy_bridge.technology,
- .tech_pvt = dummy_bridge.tech_pvt,
- };
- struct ast_frame action = {
- .frametype = AST_FRAME_BRIDGE_ACTION,
- .subclass.integer = AST_BRIDGE_ACTION_DEFERRED_TECH_DESTROY,
- .data.ptr = &deferred_tech_destroy,
- .datalen = sizeof(deferred_tech_destroy),
- };
-
- /*
- * We need to defer the bridge technology destroy callback
- * because we have the bridge locked.
- */
- deferred_action = ast_frdup(&action);
- if (!deferred_action) {
- ast_module_unref(new_technology->mod);
- return -1;
- }
- } else {
- deferred_action = NULL;
- }
-
- /*
- * We are now committed to changing the bridge technology. We
- * must not release the bridge lock until we have installed the
- * new bridge technology.
- */
- ast_verb(4, "Bridge %s: switching from %s technology to %s\n",
- bridge->uniqueid, old_technology->name, new_technology->name);
-
- /*
- * Since we are soon going to pass this bridge to a new
- * technology we need to NULL out the tech_pvt pointer but
- * don't worry as it still exists in dummy_bridge, ditto for the
- * old technology.
- */
- bridge->tech_pvt = NULL;
- bridge->technology = new_technology;
-
- /* Setup the new bridge technology. */
- ast_debug(1, "Bridge %s: calling %s technology constructor\n",
- bridge->uniqueid, new_technology->name);
- if (new_technology->create && new_technology->create(bridge)) {
- ast_log(LOG_WARNING, "Bridge %s: failed to setup bridge technology %s\n",
- bridge->uniqueid, new_technology->name);
- bridge->tech_pvt = dummy_bridge.tech_pvt;
- bridge->technology = dummy_bridge.technology;
- ast_module_unref(new_technology->mod);
- return -1;
- }
-
- ast_debug(1, "Bridge %s: calling %s technology stop\n",
- dummy_bridge.uniqueid, old_technology->name);
- if (old_technology->stop) {
- old_technology->stop(&dummy_bridge);
- }
-
- /*
- * Move existing channels over to the new technology and
- * complete joining any new channels to the bridge.
- */
- AST_LIST_TRAVERSE(&bridge->channels, bridge_channel, entry) {
- if (!bridge_channel->just_joined) {
- /* Take existing channel from the old technology. */
- ast_debug(1, "Bridge %s: %p(%s) is leaving %s technology (dummy)\n",
- dummy_bridge.uniqueid, bridge_channel, ast_channel_name(bridge_channel->chan),
- old_technology->name);
- if (old_technology->leave) {
- old_technology->leave(&dummy_bridge, bridge_channel);
- }
- }
-
- /* Add any new channels or re-add an existing channel to the bridge. */
- bridge_channel_complete_join(bridge, bridge_channel);
- }
-
- ast_debug(1, "Bridge %s: calling %s technology start\n",
- bridge->uniqueid, new_technology->name);
- if (new_technology->start && new_technology->start(bridge)) {
- ast_log(LOG_WARNING, "Bridge %s: failed to start bridge technology %s\n",
- bridge->uniqueid, new_technology->name);
- }
-
- /*
- * Now that all the channels have been moved over we need to get
- * rid of all the information the old technology may have left
- * around.
- */
- if (old_technology->destroy) {
- ast_debug(1, "Bridge %s: deferring %s technology destructor\n",
- dummy_bridge.uniqueid, old_technology->name);
- bridge_queue_action_nodup(bridge, deferred_action);
- } else {
- ast_debug(1, "Bridge %s: calling %s technology destructor\n",
- dummy_bridge.uniqueid, old_technology->name);
- ast_module_unref(old_technology->mod);
- }
-
- return 0;
-}
-
-/*!
- * \internal
- * \brief Bridge channel to check if a BRIDGE_PLAY_SOUND needs to be played.
- * \since 12.0.0
- *
- * \param bridge_channel What to check.
- *
- * \return Nothing
- */
-static void check_bridge_play_sound(struct ast_bridge_channel *bridge_channel)
-{
- const char *play_file;
-
- ast_channel_lock(bridge_channel->chan);
- play_file = pbx_builtin_getvar_helper(bridge_channel->chan, "BRIDGE_PLAY_SOUND");
- if (!ast_strlen_zero(play_file)) {
- play_file = ast_strdupa(play_file);
- pbx_builtin_setvar_helper(bridge_channel->chan, "BRIDGE_PLAY_SOUND", NULL);
- } else {
- play_file = NULL;
- }
- ast_channel_unlock(bridge_channel->chan);
-
- if (play_file) {
- ast_bridge_channel_queue_playfile(bridge_channel, NULL, play_file, NULL);
- }
-}
-
-/*!
- * \internal
- * \brief Check for any BRIDGE_PLAY_SOUND channel variables in the bridge.
- * \since 12.0.0
- *
- * \param bridge What to operate on.
- *
- * \note On entry, the bridge is already locked.
- *
- * \return Nothing
- */
-static void check_bridge_play_sounds(struct ast_bridge *bridge)
-{
- struct ast_bridge_channel *bridge_channel;
-
- AST_LIST_TRAVERSE(&bridge->channels, bridge_channel, entry) {
- check_bridge_play_sound(bridge_channel);
- }
-}
-
-static void update_bridge_vars_set(struct ast_channel *chan, const char *name, const char *pvtid)
-{
- pbx_builtin_setvar_helper(chan, "BRIDGEPEER", name);
- pbx_builtin_setvar_helper(chan, "BRIDGEPVTCALLID", pvtid);
-}
-
-/*!
- * \internal
- * \brief Set BRIDGEPEER and BRIDGEPVTCALLID channel variables in a 2 party bridge.
- * \since 12.0.0
- *
- * \param c0 Party of the first part.
- * \param c1 Party of the second part.
- *
- * \note On entry, the bridge is already locked.
- * \note The bridge is expected to have exactly two parties.
- *
- * \return Nothing
- */
-static void set_bridge_peer_vars_2party(struct ast_channel *c0, struct ast_channel *c1)
-{
- const char *c0_name;
- const char *c1_name;
- const char *c0_pvtid = NULL;
- const char *c1_pvtid = NULL;
-#define UPDATE_BRIDGE_VARS_GET(chan, name, pvtid) \
- do { \
- name = ast_strdupa(ast_channel_name(chan)); \
- if (ast_channel_tech(chan)->get_pvt_uniqueid) { \
- pvtid = ast_strdupa(ast_channel_tech(chan)->get_pvt_uniqueid(chan)); \
- } \
- } while (0)
-
- ast_channel_lock(c1);
- UPDATE_BRIDGE_VARS_GET(c1, c1_name, c1_pvtid);
- ast_channel_unlock(c1);
-
- ast_channel_lock(c0);
- update_bridge_vars_set(c0, c1_name, c1_pvtid);
- UPDATE_BRIDGE_VARS_GET(c0, c0_name, c0_pvtid);
- ast_channel_unlock(c0);
-
- ast_channel_lock(c1);
- update_bridge_vars_set(c1, c0_name, c0_pvtid);
- ast_channel_unlock(c1);
-}
-
-/*!
- * \internal
- * \brief Fill the BRIDGEPEER value buffer with a comma separated list of channel names.
- * \since 12.0.0
- *
- * \param buf Buffer to fill. The caller must guarantee the buffer is large enough.
- * \param cur_idx Which index into names[] to skip.
- * \param names Channel names to put in the buffer.
- * \param num_names Number of names in the array.
- *
- * \return Nothing
- */
-static void fill_bridgepeer_buf(char *buf, unsigned int cur_idx, const char *names[], unsigned int num_names)
-{
- int need_separator = 0;
- unsigned int idx;
- const char *src;
- char *pos;
-
- pos = buf;
- for (idx = 0; idx < num_names; ++idx) {
- if (idx == cur_idx) {
- continue;
- }
-
- if (need_separator) {
- *pos++ = ',';
- }
- need_separator = 1;
-
- /* Copy name into buffer. */
- src = names[idx];
- while (*src) {
- *pos++ = *src++;
- }
- }
- *pos = '\0';
-}
-
-/*!
- * \internal
- * \brief Set BRIDGEPEER and BRIDGEPVTCALLID channel variables in a multi-party bridge.
- * \since 12.0.0
- *
- * \param bridge What to operate on.
- *
- * \note On entry, the bridge is already locked.
- * \note The bridge is expected to have more than two parties.
- *
- * \return Nothing
- */
-static void set_bridge_peer_vars_multiparty(struct ast_bridge *bridge)
-{
-/*
- * Set a maximum number of channel names for the BRIDGEPEER
- * list. The plus one is for the current channel which is not
- * put in the list.
- */
-#define MAX_BRIDGEPEER_CHANS (10 + 1)
-
- unsigned int idx;
- unsigned int num_names;
- unsigned int len;
- const char **names;
- char *buf;
- struct ast_bridge_channel *bridge_channel;
-
- /* Get first MAX_BRIDGEPEER_CHANS channel names. */
- num_names = MIN(bridge->num_channels, MAX_BRIDGEPEER_CHANS);
- names = ast_alloca(num_names * sizeof(*names));
- idx = 0;
- AST_LIST_TRAVERSE(&bridge->channels, bridge_channel, entry) {
- if (num_names <= idx) {
- break;
- }
- ast_channel_lock(bridge_channel->chan);
- names[idx++] = ast_strdupa(ast_channel_name(bridge_channel->chan));
- ast_channel_unlock(bridge_channel->chan);
- }
-
- /* Determine maximum buf size needed. */
- len = num_names;
- for (idx = 0; idx < num_names; ++idx) {
- len += strlen(names[idx]);
- }
- buf = ast_alloca(len);
-
- /* Set the bridge channel variables. */
- idx = 0;
- buf[0] = '\0';
- AST_LIST_TRAVERSE(&bridge->channels, bridge_channel, entry) {
- if (idx < num_names) {
- fill_bridgepeer_buf(buf, idx, names, num_names);
- }
- ++idx;
-
- ast_channel_lock(bridge_channel->chan);
- update_bridge_vars_set(bridge_channel->chan, buf, NULL);
- ast_channel_unlock(bridge_channel->chan);
- }
-}
-
-/*!
- * \internal
- * \brief Set BRIDGEPEER and BRIDGEPVTCALLID channel variables in a holding bridge.
- * \since 12.0.0
- *
- * \param bridge What to operate on.
- *
- * \note On entry, the bridge is already locked.
- *
- * \return Nothing
- */
-static void set_bridge_peer_vars_holding(struct ast_bridge *bridge)
-{
- struct ast_bridge_channel *bridge_channel;
-
- AST_LIST_TRAVERSE(&bridge->channels, bridge_channel, entry) {
- ast_channel_lock(bridge_channel->chan);
- update_bridge_vars_set(bridge_channel->chan, NULL, NULL);
- ast_channel_unlock(bridge_channel->chan);
- }
-}
-
-/*!
- * \internal
- * \brief Set BRIDGEPEER and BRIDGEPVTCALLID channel variables in the bridge.
- * \since 12.0.0
- *
- * \param bridge What to operate on.
- *
- * \note On entry, the bridge is already locked.
- *
- * \return Nothing
- */
-static void set_bridge_peer_vars(struct ast_bridge *bridge)
-{
- if (bridge->technology->capabilities & AST_BRIDGE_CAPABILITY_HOLDING) {
- set_bridge_peer_vars_holding(bridge);
- return;
- }
- if (bridge->num_channels < 2) {
- return;
- }
- if (bridge->num_channels == 2) {
- set_bridge_peer_vars_2party(AST_LIST_FIRST(&bridge->channels)->chan,
- AST_LIST_LAST(&bridge->channels)->chan);
- } else {
- set_bridge_peer_vars_multiparty(bridge);
- }
-}
-
-/*!
- * \internal
- * \brief Notify the bridge that it has been reconfigured.
- * \since 12.0.0
- *
- * \param bridge Reconfigured bridge.
- * \param colp_update Whether to perform COLP updates.
- *
- * \details
- * After a series of bridge_channel_push and
- * bridge_channel_pull calls, you need to call this function
- * to cause the bridge to complete restructuring for the change
- * in the channel makeup of the bridge.
- *
- * \note On entry, the bridge is already locked.
- *
- * \return Nothing
- */
-static void bridge_reconfigured(struct ast_bridge *bridge, unsigned int colp_update)
-{
- if (!bridge->reconfigured) {
- return;
- }
- bridge->reconfigured = 0;
- if (ast_test_flag(&bridge->feature_flags, AST_BRIDGE_FLAG_SMART)
- && smart_bridge_operation(bridge)) {
- /* Smart bridge failed. */
- bridge_dissolve(bridge);
- return;
- }
- bridge_complete_join(bridge);
-
- if (bridge->dissolved) {
- return;
- }
- check_bridge_play_sounds(bridge);
- set_bridge_peer_vars(bridge);
- ast_bridge_publish_state(bridge);
-
- if (colp_update) {
- bridge_reconfigured_connected_line_update(bridge);
- }
-}
-
-/*!
- * \internal
- * \brief Suspend a channel from a bridge.
- *
- * \param bridge_channel Channel to suspend.
- *
- * \note This function assumes bridge_channel->bridge is locked.
- *
- * \return Nothing
- */
-static void bridge_channel_suspend_nolock(struct ast_bridge_channel *bridge_channel)
-{
- bridge_channel->suspended = 1;
- if (bridge_channel->in_bridge) {
- --bridge_channel->bridge->num_active;
- }
-
- /* Get technology bridge threads off of the channel. */
- if (bridge_channel->bridge->technology->suspend) {
- bridge_channel->bridge->technology->suspend(bridge_channel->bridge, bridge_channel);
- }
-}
-
-/*!
- * \internal
- * \brief Suspend a channel from a bridge.
- *
- * \param bridge_channel Channel to suspend.
- *
- * \return Nothing
- */
-static void bridge_channel_suspend(struct ast_bridge_channel *bridge_channel)
-{
- ast_bridge_channel_lock_bridge(bridge_channel);
- bridge_channel_suspend_nolock(bridge_channel);
- ast_bridge_unlock(bridge_channel->bridge);
-}
-
-/*!
- * \internal
- * \brief Unsuspend a channel from a bridge.
- *
- * \param bridge_channel Channel to unsuspend.
- *
- * \note This function assumes bridge_channel->bridge is locked.
- *
- * \return Nothing
- */
-static void bridge_channel_unsuspend_nolock(struct ast_bridge_channel *bridge_channel)
-{
- bridge_channel->suspended = 0;
- if (bridge_channel->in_bridge) {
- ++bridge_channel->bridge->num_active;
- }
-
- /* Wake technology bridge threads to take care of channel again. */
- if (bridge_channel->bridge->technology->unsuspend) {
- bridge_channel->bridge->technology->unsuspend(bridge_channel->bridge, bridge_channel);
- }
-
- /* Wake suspended channel. */
- ast_bridge_channel_lock(bridge_channel);
- ast_cond_signal(&bridge_channel->cond);
- ast_bridge_channel_unlock(bridge_channel);
-}
-
-/*!
- * \internal
- * \brief Unsuspend a channel from a bridge.
- *
- * \param bridge_channel Channel to unsuspend.
- *
- * \return Nothing
- */
-static void bridge_channel_unsuspend(struct ast_bridge_channel *bridge_channel)
-{
- ast_bridge_channel_lock_bridge(bridge_channel);
- bridge_channel_unsuspend_nolock(bridge_channel);
- ast_bridge_unlock(bridge_channel->bridge);
-}
-
-/*! \brief Internal function that activates interval hooks on a bridge channel */
-static void bridge_channel_interval(struct ast_bridge_channel *bridge_channel)
-{
- struct ast_bridge_hook *hook;
- struct timeval start;
+ /* Determine new bridge technology capabilities needed. */
+ if (2 < bridge->num_channels) {
+ new_capabilities = AST_BRIDGE_CAPABILITY_MULTIMIX;
+ new_capabilities &= bridge->allowed_capabilities;
+ } else {
+ new_capabilities = AST_BRIDGE_CAPABILITY_NATIVE | AST_BRIDGE_CAPABILITY_1TO1MIX;
+ new_capabilities &= bridge->allowed_capabilities;
+ if (!new_capabilities
+ && (bridge->allowed_capabilities & AST_BRIDGE_CAPABILITY_MULTIMIX)) {
+ /* Allow switching between different multimix bridge technologies. */
+ new_capabilities = AST_BRIDGE_CAPABILITY_MULTIMIX;
+ }
+ }
- ast_heap_wrlock(bridge_channel->features->interval_hooks);
- start = ast_tvnow();
- while ((hook = ast_heap_peek(bridge_channel->features->interval_hooks, 1))) {
- int interval;
- unsigned int execution_time;
+ /* Find a bridge technology to satisfy the new capabilities. */
+ new_technology = find_best_technology(new_capabilities, bridge);
+ if (!new_technology) {
+ int is_compatible = 0;
- if (ast_tvdiff_ms(hook->parms.timer.trip_time, start) > 0) {
- ast_debug(1, "Hook %p on %p(%s) wants to happen in the future, stopping our traversal\n",
- hook, bridge_channel, ast_channel_name(bridge_channel->chan));
- break;
- }
- ao2_ref(hook, +1);
- ast_heap_unlock(bridge_channel->features->interval_hooks);
-
- ast_debug(1, "Executing hook %p on %p(%s)\n",
- hook, bridge_channel, ast_channel_name(bridge_channel->chan));
- interval = hook->callback(bridge_channel->bridge, bridge_channel, hook->hook_pvt);
-
- ast_heap_wrlock(bridge_channel->features->interval_hooks);
- if (ast_heap_peek(bridge_channel->features->interval_hooks,
- hook->parms.timer.heap_index) != hook
- || !ast_heap_remove(bridge_channel->features->interval_hooks, hook)) {
- /* Interval hook is already removed from the bridge_channel. */
- ao2_ref(hook, -1);
- continue;
+ if (old_technology->compatible) {
+ is_compatible = old_technology->compatible(bridge);
+ } else if (old_technology->capabilities & AST_BRIDGE_CAPABILITY_MULTIMIX) {
+ is_compatible = 1;
+ } else if (bridge->num_channels <= 2
+ && (old_technology->capabilities & AST_BRIDGE_CAPABILITY_1TO1MIX)) {
+ is_compatible = 1;
}
- ao2_ref(hook, -1);
- if (interval < 0) {
- ast_debug(1, "Removed interval hook %p from %p(%s)\n",
- hook, bridge_channel, ast_channel_name(bridge_channel->chan));
- ao2_ref(hook, -1);
- continue;
- }
- if (interval) {
- /* Set new interval for the hook. */
- hook->parms.timer.interval = interval;
+ if (is_compatible) {
+ ast_debug(1, "Bridge %s could not get a new technology, staying with old technology.\n",
+ bridge->uniqueid);
+ return 0;
}
+ ast_log(LOG_WARNING, "Bridge %s has no technology available to support it.\n",
+ bridge->uniqueid);
+ return -1;
+ }
+ if (new_technology == old_technology) {
+ ast_debug(1, "Bridge %s is already using the new technology.\n",
+ bridge->uniqueid);
+ ast_module_unref(old_technology->mod);
+ return 0;
+ }
- ast_debug(1, "Updating interval hook %p with interval %u on %p(%s)\n",
- hook, hook->parms.timer.interval, bridge_channel,
- ast_channel_name(bridge_channel->chan));
+ ast_copy_string(dummy_bridge.uniqueid, bridge->uniqueid, sizeof(dummy_bridge.uniqueid));
- /* resetting start */
- start = ast_tvnow();
+ if (old_technology->destroy) {
+ struct tech_deferred_destroy deferred_tech_destroy = {
+ .tech = dummy_bridge.technology,
+ .tech_pvt = dummy_bridge.tech_pvt,
+ };
+ struct ast_frame action = {
+ .frametype = AST_FRAME_BRIDGE_ACTION,
+ .subclass.integer = AST_BRIDGE_ACTION_DEFERRED_TECH_DESTROY,
+ .data.ptr = &deferred_tech_destroy,
+ .datalen = sizeof(deferred_tech_destroy),
+ };
/*
- * Resetup the interval hook for the next interval. We may need
- * to skip over any missed intervals because the hook was
- * delayed or took too long.
+ * We need to defer the bridge technology destroy callback
+ * because we have the bridge locked.
*/
- execution_time = ast_tvdiff_ms(start, hook->parms.timer.trip_time);
- while (hook->parms.timer.interval < execution_time) {
- execution_time -= hook->parms.timer.interval;
- }
- hook->parms.timer.trip_time = ast_tvadd(start, ast_samp2tv(hook->parms.timer.interval - execution_time, 1000));
- hook->parms.timer.seqno = ast_atomic_fetchadd_int((int *) &bridge_channel->features->interval_sequence, +1);
-
- if (ast_heap_push(bridge_channel->features->interval_hooks, hook)) {
- /* Could not push the hook back onto the heap. */
- ao2_ref(hook, -1);
+ deferred_action = ast_frdup(&action);
+ if (!deferred_action) {
+ ast_module_unref(new_technology->mod);
+ return -1;
}
+ } else {
+ deferred_action = NULL;
}
- ast_heap_unlock(bridge_channel->features->interval_hooks);
-}
-static int bridge_channel_write_dtmf_stream(struct ast_bridge_channel *bridge_channel, const char *dtmf)
-{
- return ast_bridge_channel_write_action_data(bridge_channel,
- AST_BRIDGE_ACTION_DTMF_STREAM, dtmf, strlen(dtmf) + 1);
-}
+ /*
+ * We are now committed to changing the bridge technology. We
+ * must not release the bridge lock until we have installed the
+ * new bridge technology.
+ */
+ ast_verb(4, "Bridge %s: switching from %s technology to %s\n",
+ bridge->uniqueid, old_technology->name, new_technology->name);
-/*!
- * \brief Internal function that executes a feature on a bridge channel
- * \note Neither the bridge nor the bridge_channel locks should be held when entering
- * this function.
- */
-static void bridge_channel_feature(struct ast_bridge_channel *bridge_channel)
-{
- struct ast_bridge_features *features = bridge_channel->features;
- struct ast_bridge_hook *hook = NULL;
- char dtmf[MAXIMUM_DTMF_FEATURE_STRING] = "";
- size_t dtmf_len = 0;
- unsigned int digit_timeout;
- RAII_VAR(struct ast_features_general_config *, gen_cfg, NULL, ao2_cleanup);
+ /*
+ * Since we are soon going to pass this bridge to a new
+ * technology we need to NULL out the tech_pvt pointer but
+ * don't worry as it still exists in dummy_bridge, ditto for the
+ * old technology.
+ */
+ bridge->tech_pvt = NULL;
+ bridge->technology = new_technology;
- ast_channel_lock(bridge_channel->chan);
- gen_cfg = ast_get_chan_features_general_config(bridge_channel->chan);
- if (!gen_cfg) {
- ast_log(LOG_ERROR, "Unable to retrieve features configuration.\n");
- ast_channel_unlock(bridge_channel->chan);
- return;
+ /* Setup the new bridge technology. */
+ ast_debug(1, "Bridge %s: calling %s technology constructor\n",
+ bridge->uniqueid, new_technology->name);
+ if (new_technology->create && new_technology->create(bridge)) {
+ ast_log(LOG_WARNING, "Bridge %s: failed to setup bridge technology %s\n",
+ bridge->uniqueid, new_technology->name);
+ bridge->tech_pvt = dummy_bridge.tech_pvt;
+ bridge->technology = dummy_bridge.technology;
+ ast_module_unref(new_technology->mod);
+ return -1;
}
- digit_timeout = gen_cfg->featuredigittimeout;
- ast_channel_unlock(bridge_channel->chan);
-
- /* The channel is now under our control and we don't really want any begin frames to do our DTMF matching so disable 'em at the core level */
- ast_set_flag(ast_channel_flags(bridge_channel->chan), AST_FLAG_END_DTMF_ONLY);
-
- /* Wait for DTMF on the channel and put it into a buffer. If the buffer matches any feature hook execute the hook. */
- do {
- int res;
-
- /* If the above timed out simply exit */
- res = ast_waitfordigit(bridge_channel->chan, digit_timeout);
- if (!res) {
- ast_debug(1, "DTMF feature string collection on %p(%s) timed out\n",
- bridge_channel, ast_channel_name(bridge_channel->chan));
- break;
- }
- if (res < 0) {
- ast_debug(1, "DTMF feature string collection failed on %p(%s) for some reason\n",
- bridge_channel, ast_channel_name(bridge_channel->chan));
- break;
- }
-
-/* BUGBUG need to record the duration of DTMF digits so when the string is played back, they are reproduced. */
- /* Add the above DTMF into the DTMF string so we can do our matching */
- dtmf[dtmf_len++] = res;
- ast_debug(1, "DTMF feature string on %p(%s) is now '%s'\n",
- bridge_channel, ast_channel_name(bridge_channel->chan), dtmf);
-
- /* See if a DTMF feature hook matches or can match */
- hook = ao2_find(features->dtmf_hooks, dtmf, OBJ_PARTIAL_KEY);
- if (!hook) {
- ast_debug(1, "No DTMF feature hooks on %p(%s) match '%s'\n",
- bridge_channel, ast_channel_name(bridge_channel->chan), dtmf);
- break;
- }
- if (strlen(hook->parms.dtmf.code) == dtmf_len) {
- ast_debug(1, "DTMF feature hook %p matched DTMF string '%s' on %p(%s)\n",
- hook, dtmf, bridge_channel, ast_channel_name(bridge_channel->chan));
- break;
- }
- ao2_ref(hook, -1);
- hook = NULL;
-
- /* Stop if we have reached the maximum length of a DTMF feature string. */
- } while (dtmf_len < ARRAY_LEN(dtmf) - 1);
- /* Since we are done bringing DTMF in return to using both begin and end frames */
- ast_clear_flag(ast_channel_flags(bridge_channel->chan), AST_FLAG_END_DTMF_ONLY);
-
- /* If a hook was actually matched execute it on this channel, otherwise stream up the DTMF to the other channels */
- if (hook) {
- int remove_me;
+ ast_debug(1, "Bridge %s: calling %s technology stop\n",
+ dummy_bridge.uniqueid, old_technology->name);
+ if (old_technology->stop) {
+ old_technology->stop(&dummy_bridge);
+ }
- remove_me = hook->callback(bridge_channel->bridge, bridge_channel, hook->hook_pvt);
- if (remove_me) {
- ast_debug(1, "DTMF hook %p is being removed from %p(%s)\n",
- hook, bridge_channel, ast_channel_name(bridge_channel->chan));
- ao2_unlink(features->dtmf_hooks, hook);
+ /*
+ * Move existing channels over to the new technology and
+ * complete joining any new channels to the bridge.
+ */
+ AST_LIST_TRAVERSE(&bridge->channels, bridge_channel, entry) {
+ if (!bridge_channel->just_joined) {
+ /* Take existing channel from the old technology. */
+ ast_debug(1, "Bridge %s: %p(%s) is leaving %s technology (dummy)\n",
+ dummy_bridge.uniqueid, bridge_channel, ast_channel_name(bridge_channel->chan),
+ old_technology->name);
+ if (old_technology->leave) {
+ old_technology->leave(&dummy_bridge, bridge_channel);
+ }
}
- ao2_ref(hook, -1);
- /*
- * If we are handing the channel off to an external hook for
- * ownership, we are not guaranteed what kind of state it will
- * come back in. If the channel hungup, we need to detect that
- * here if the hook did not already change the state.
- */
- if (bridge_channel->chan && ast_check_hangup_locked(bridge_channel->chan)) {
- bridge_handle_hangup(bridge_channel);
- }
- } else if (features->dtmf_passthrough) {
- bridge_channel_write_dtmf_stream(bridge_channel, dtmf);
+ /* Add any new channels or re-add an existing channel to the bridge. */
+ bridge_channel_complete_join(bridge, bridge_channel);
}
-}
-
-static void bridge_channel_talking(struct ast_bridge_channel *bridge_channel, int talking)
-{
- struct ast_bridge_features *features = bridge_channel->features;
- if (features->talker_cb) {
- features->talker_cb(bridge_channel, features->talker_pvt_data, talking);
+ ast_debug(1, "Bridge %s: calling %s technology start\n",
+ bridge->uniqueid, new_technology->name);
+ if (new_technology->start && new_technology->start(bridge)) {
+ ast_log(LOG_WARNING, "Bridge %s: failed to start bridge technology %s\n",
+ bridge->uniqueid, new_technology->name);
}
-}
-
-/*! \brief Internal function that plays back DTMF on a bridge channel */
-static void bridge_channel_dtmf_stream(struct ast_bridge_channel *bridge_channel, const char *dtmf)
-{
- ast_debug(1, "Playing DTMF stream '%s' out to %p(%s)\n",
- dtmf, bridge_channel, ast_channel_name(bridge_channel->chan));
- ast_dtmf_stream(bridge_channel->chan, NULL, dtmf, 0, 0);
-}
-struct blind_transfer_data {
- char exten[AST_MAX_EXTENSION];
- char context[AST_MAX_CONTEXT];
-};
+ /*
+ * Now that all the channels have been moved over we need to get
+ * rid of all the information the old technology may have left
+ * around.
+ */
+ if (old_technology->destroy) {
+ ast_debug(1, "Bridge %s: deferring %s technology destructor\n",
+ dummy_bridge.uniqueid, old_technology->name);
+ bridge_queue_action_nodup(bridge, deferred_action);
+ } else {
+ ast_debug(1, "Bridge %s: calling %s technology destructor\n",
+ dummy_bridge.uniqueid, old_technology->name);
+ ast_module_unref(old_technology->mod);
+ }
-static void bridge_channel_blind_transfer(struct ast_bridge_channel *bridge_channel,
- struct blind_transfer_data *blind_data)
-{
- ast_async_goto(bridge_channel->chan, blind_data->context, blind_data->exten, 1);
- bridge_handle_hangup(bridge_channel);
+ return 0;
}
-static void after_bridge_move_channel(struct ast_channel *chan_bridged, void *data)
+/*!
+ * \internal
+ * \brief Bridge channel to check if a BRIDGE_PLAY_SOUND needs to be played.
+ * \since 12.0.0
+ *
+ * \param bridge_channel What to check.
+ *
+ * \return Nothing
+ */
+static void check_bridge_play_sound(struct ast_bridge_channel *bridge_channel)
{
- RAII_VAR(struct ast_channel *, chan_target, data, ao2_cleanup);
- struct ast_party_connected_line connected_target;
- unsigned char connected_line_data[1024];
- int payload_size;
-
- ast_party_connected_line_init(&connected_target);
-
- ast_channel_lock(chan_target);
- ast_party_connected_line_copy(&connected_target, ast_channel_connected(chan_target));
- ast_channel_unlock(chan_target);
- ast_party_id_reset(&connected_target.priv);
+ const char *play_file;
- if (ast_channel_move(chan_target, chan_bridged)) {
- ast_softhangup(chan_target, AST_SOFTHANGUP_DEV);
- ast_party_connected_line_free(&connected_target);
- return;
+ ast_channel_lock(bridge_channel->chan);
+ play_file = pbx_builtin_getvar_helper(bridge_channel->chan, "BRIDGE_PLAY_SOUND");
+ if (!ast_strlen_zero(play_file)) {
+ play_file = ast_strdupa(play_file);
+ pbx_builtin_setvar_helper(bridge_channel->chan, "BRIDGE_PLAY_SOUND", NULL);
+ } else {
+ play_file = NULL;
}
+ ast_channel_unlock(bridge_channel->chan);
- if ((payload_size = ast_connected_line_build_data(connected_line_data,
- sizeof(connected_line_data), &connected_target, NULL)) != -1) {
- struct ast_control_read_action_payload *frame_payload;
- int frame_size;
-
- frame_size = payload_size + sizeof(*frame_payload);
- frame_payload = ast_alloca(frame_size);
- frame_payload->action = AST_FRAME_READ_ACTION_CONNECTED_LINE_MACRO;
- frame_payload->payload_size = payload_size;
- memcpy(frame_payload->payload, connected_line_data, payload_size);
- ast_queue_control_data(chan_target, AST_CONTROL_READ_ACTION, frame_payload, frame_size);
+ if (play_file) {
+ ast_bridge_channel_queue_playfile(bridge_channel, NULL, play_file, NULL);
}
-
- ast_party_connected_line_free(&connected_target);
}
-static void after_bridge_move_channel_fail(enum ast_after_bridge_cb_reason reason, void *data)
+/*!
+ * \internal
+ * \brief Check for any BRIDGE_PLAY_SOUND channel variables in the bridge.
+ * \since 12.0.0
+ *
+ * \param bridge What to operate on.
+ *
+ * \note On entry, the bridge is already locked.
+ *
+ * \return Nothing
+ */
+static void check_bridge_play_sounds(struct ast_bridge *bridge)
{
- RAII_VAR(struct ast_channel *, chan_target, data, ao2_cleanup);
+ struct ast_bridge_channel *bridge_channel;
- ast_log(LOG_WARNING, "Unable to complete transfer: %s\n",
- ast_after_bridge_cb_reason_string(reason));
- ast_softhangup(chan_target, AST_SOFTHANGUP_DEV);
+ AST_LIST_TRAVERSE(&bridge->channels, bridge_channel, entry) {
+ check_bridge_play_sound(bridge_channel);
+ }
}
-static void bridge_channel_attended_transfer(struct ast_bridge_channel *bridge_channel,
- const char *target_chan_name)
+static void update_bridge_vars_set(struct ast_channel *chan, const char *name, const char *pvtid)
{
- RAII_VAR(struct ast_channel *, chan_target, NULL, ao2_cleanup);
- RAII_VAR(struct ast_channel *, chan_bridged, NULL, ao2_cleanup);
-
- chan_target = ast_channel_get_by_name(target_chan_name);
- if (!chan_target) {
- /* Dang, it disappeared somehow */
- bridge_handle_hangup(bridge_channel);
- return;
- }
-
- ast_bridge_channel_lock(bridge_channel);
- chan_bridged = bridge_channel->chan;
- ast_assert(chan_bridged != NULL);
- ao2_ref(chan_bridged, +1);
- ast_bridge_channel_unlock(bridge_channel);
-
- if (ast_after_bridge_callback_set(chan_bridged, after_bridge_move_channel,
- after_bridge_move_channel_fail, ast_channel_ref(chan_target))) {
- ast_softhangup(chan_target, AST_SOFTHANGUP_DEV);
-
- /* Release the ref we tried to pass to ast_after_bridge_callback_set(). */
- ast_channel_unref(chan_target);
- }
- bridge_handle_hangup(bridge_channel);
+ pbx_builtin_setvar_helper(chan, "BRIDGEPEER", name);
+ pbx_builtin_setvar_helper(chan, "BRIDGEPVTCALLID", pvtid);
}
/*!
* \internal
- * \brief Handle bridge channel bridge action frame.
+ * \brief Set BRIDGEPEER and BRIDGEPVTCALLID channel variables in a 2 party bridge.
* \since 12.0.0
*
- * \param bridge_channel Channel to execute the action on.
- * \param action What to do.
+ * \param c0 Party of the first part.
+ * \param c1 Party of the second part.
+ *
+ * \note On entry, the bridge is already locked.
+ * \note The bridge is expected to have exactly two parties.
*
* \return Nothing
*/
-static void bridge_channel_handle_action(struct ast_bridge_channel *bridge_channel, struct ast_frame *action)
+static void set_bridge_peer_vars_2party(struct ast_channel *c0, struct ast_channel *c1)
{
- switch (action->subclass.integer) {
- case AST_BRIDGE_ACTION_INTERVAL:
- bridge_channel_suspend(bridge_channel);
- ast_indicate(bridge_channel->chan, AST_CONTROL_SRCUPDATE);
- bridge_channel_interval(bridge_channel);
- ast_indicate(bridge_channel->chan, AST_CONTROL_SRCUPDATE);
- bridge_channel_unsuspend(bridge_channel);
- break;
- case AST_BRIDGE_ACTION_FEATURE:
- bridge_channel_suspend(bridge_channel);
- ast_indicate(bridge_channel->chan, AST_CONTROL_SRCUPDATE);
- bridge_channel_feature(bridge_channel);
- ast_indicate(bridge_channel->chan, AST_CONTROL_SRCUPDATE);
- bridge_channel_unsuspend(bridge_channel);
- break;
- case AST_BRIDGE_ACTION_DTMF_STREAM:
- bridge_channel_suspend(bridge_channel);
- ast_indicate(bridge_channel->chan, AST_CONTROL_SRCUPDATE);
- bridge_channel_dtmf_stream(bridge_channel, action->data.ptr);
- ast_indicate(bridge_channel->chan, AST_CONTROL_SRCUPDATE);
- bridge_channel_unsuspend(bridge_channel);
- break;
- case AST_BRIDGE_ACTION_TALKING_START:
- case AST_BRIDGE_ACTION_TALKING_STOP:
- bridge_channel_talking(bridge_channel,
- action->subclass.integer == AST_BRIDGE_ACTION_TALKING_START);
- break;
- case AST_BRIDGE_ACTION_PLAY_FILE:
- bridge_channel_suspend(bridge_channel);
- ast_indicate(bridge_channel->chan, AST_CONTROL_SRCUPDATE);
- bridge_channel_playfile(bridge_channel, action->data.ptr);
- ast_indicate(bridge_channel->chan, AST_CONTROL_SRCUPDATE);
- bridge_channel_unsuspend(bridge_channel);
- break;
- case AST_BRIDGE_ACTION_RUN_APP:
- bridge_channel_suspend(bridge_channel);
- ast_indicate(bridge_channel->chan, AST_CONTROL_SRCUPDATE);
- bridge_channel_run_app(bridge_channel, action->data.ptr);
- ast_indicate(bridge_channel->chan, AST_CONTROL_SRCUPDATE);
- bridge_channel_unsuspend(bridge_channel);
- break;
- case AST_BRIDGE_ACTION_CALLBACK:
- bridge_channel_suspend(bridge_channel);
- ast_indicate(bridge_channel->chan, AST_CONTROL_SRCUPDATE);
- bridge_channel_do_callback(bridge_channel, action->data.ptr);
- ast_indicate(bridge_channel->chan, AST_CONTROL_SRCUPDATE);
- bridge_channel_unsuspend(bridge_channel);
- break;
- case AST_BRIDGE_ACTION_PARK:
- bridge_channel_suspend(bridge_channel);
- ast_indicate(bridge_channel->chan, AST_CONTROL_SRCUPDATE);
- bridge_channel_park(bridge_channel, action->data.ptr);
- ast_indicate(bridge_channel->chan, AST_CONTROL_SRCUPDATE);
- bridge_channel_unsuspend(bridge_channel);
- break;
- case AST_BRIDGE_ACTION_BLIND_TRANSFER:
- bridge_channel_blind_transfer(bridge_channel, action->data.ptr);
- break;
- case AST_BRIDGE_ACTION_ATTENDED_TRANSFER:
- bridge_channel_attended_transfer(bridge_channel, action->data.ptr);
- break;
- default:
- break;
- }
+ const char *c0_name;
+ const char *c1_name;
+ const char *c0_pvtid = NULL;
+ const char *c1_pvtid = NULL;
+#define UPDATE_BRIDGE_VARS_GET(chan, name, pvtid) \
+ do { \
+ name = ast_strdupa(ast_channel_name(chan)); \
+ if (ast_channel_tech(chan)->get_pvt_uniqueid) { \
+ pvtid = ast_strdupa(ast_channel_tech(chan)->get_pvt_uniqueid(chan)); \
+ } \
+ } while (0)
+
+ ast_channel_lock(c1);
+ UPDATE_BRIDGE_VARS_GET(c1, c1_name, c1_pvtid);
+ ast_channel_unlock(c1);
+
+ ast_channel_lock(c0);
+ update_bridge_vars_set(c0, c1_name, c1_pvtid);
+ UPDATE_BRIDGE_VARS_GET(c0, c0_name, c0_pvtid);
+ ast_channel_unlock(c0);
+
+ ast_channel_lock(c1);
+ update_bridge_vars_set(c1, c0_name, c0_pvtid);
+ ast_channel_unlock(c1);
}
/*!
* \internal
- * \brief Handle bridge channel control frame action.
+ * \brief Fill the BRIDGEPEER value buffer with a comma separated list of channel names.
* \since 12.0.0
*
- * \param bridge_channel Channel to execute the control frame action on.
- * \param fr Control frame to handle.
+ * \param buf Buffer to fill. The caller must guarantee the buffer is large enough.
+ * \param cur_idx Which index into names[] to skip.
+ * \param names Channel names to put in the buffer.
+ * \param num_names Number of names in the array.
*
* \return Nothing
*/
-static void bridge_channel_handle_control(struct ast_bridge_channel *bridge_channel, struct ast_frame *fr)
+static void fill_bridgepeer_buf(char *buf, unsigned int cur_idx, const char *names[], unsigned int num_names)
{
- struct ast_channel *chan;
- struct ast_option_header *aoh;
- int is_caller;
- int intercept_failed;
+ int need_separator = 0;
+ unsigned int idx;
+ const char *src;
+ char *pos;
- chan = bridge_channel->chan;
- switch (fr->subclass.integer) {
- case AST_CONTROL_REDIRECTING:
- is_caller = !ast_test_flag(ast_channel_flags(chan), AST_FLAG_OUTGOING);
- bridge_channel_suspend(bridge_channel);
- intercept_failed = ast_channel_redirecting_sub(NULL, chan, fr, 1)
- && ast_channel_redirecting_macro(NULL, chan, fr, is_caller, 1);
- bridge_channel_unsuspend(bridge_channel);
- if (intercept_failed) {
- ast_indicate_data(chan, fr->subclass.integer, fr->data.ptr, fr->datalen);
- }
- break;
- case AST_CONTROL_CONNECTED_LINE:
- is_caller = !ast_test_flag(ast_channel_flags(chan), AST_FLAG_OUTGOING);
- bridge_channel_suspend(bridge_channel);
- intercept_failed = ast_channel_connected_line_sub(NULL, chan, fr, 1)
- && ast_channel_connected_line_macro(NULL, chan, fr, is_caller, 1);
- bridge_channel_unsuspend(bridge_channel);
- if (intercept_failed) {
- ast_indicate_data(chan, fr->subclass.integer, fr->data.ptr, fr->datalen);
+ pos = buf;
+ for (idx = 0; idx < num_names; ++idx) {
+ if (idx == cur_idx) {
+ continue;
}
- break;
- case AST_CONTROL_HOLD:
- case AST_CONTROL_UNHOLD:
-/*
- * BUGBUG bridge_channels should remember sending/receiving an outstanding HOLD to/from the bridge
- *
- * When the sending channel is pulled from the bridge it needs to write into the bridge an UNHOLD before being pulled.
- * When the receiving channel is pulled from the bridge it needs to generate its own UNHOLD.
- * Something similar needs to be done for DTMF begin/end.
- */
- case AST_CONTROL_VIDUPDATE:
- case AST_CONTROL_SRCUPDATE:
- case AST_CONTROL_SRCCHANGE:
- case AST_CONTROL_T38_PARAMETERS:
-/* BUGBUG may have to do something with a jitter buffer for these. */
- ast_indicate_data(chan, fr->subclass.integer, fr->data.ptr, fr->datalen);
- break;
- case AST_CONTROL_OPTION:
- /*
- * Forward option Requests, but only ones we know are safe These
- * are ONLY sent by chan_iax2 and I'm not convinced that they
- * are useful. I haven't deleted them entirely because I just am
- * not sure of the ramifications of removing them.
- */
- aoh = fr->data.ptr;
- if (aoh && aoh->flag == AST_OPTION_FLAG_REQUEST) {
- switch (ntohs(aoh->option)) {
- case AST_OPTION_TONE_VERIFY:
- case AST_OPTION_TDD:
- case AST_OPTION_RELAXDTMF:
- case AST_OPTION_AUDIO_MODE:
- case AST_OPTION_DIGIT_DETECT:
- case AST_OPTION_FAX_DETECT:
- ast_channel_setoption(chan, ntohs(aoh->option), aoh->data,
- fr->datalen - sizeof(*aoh), 0);
- break;
- default:
- break;
- }
+
+ if (need_separator) {
+ *pos++ = ',';
}
- break;
- case AST_CONTROL_ANSWER:
- if (ast_channel_state(chan) != AST_STATE_UP) {
- ast_answer(chan);
- } else {
- ast_indicate(chan, -1);
+ need_separator = 1;
+
+ /* Copy name into buffer. */
+ src = names[idx];
+ while (*src) {
+ *pos++ = *src++;
}
- break;
- default:
- ast_indicate_data(chan, fr->subclass.integer, fr->data.ptr, fr->datalen);
- break;
}
+ *pos = '\0';
}
/*!
* \internal
- * \brief Handle bridge channel write frame to channel.
+ * \brief Set BRIDGEPEER and BRIDGEPVTCALLID channel variables in a multi-party bridge.
* \since 12.0.0
*
- * \param bridge_channel Channel to write outgoing frame.
+ * \param bridge What to operate on.
+ *
+ * \note On entry, the bridge is already locked.
+ * \note The bridge is expected to have more than two parties.
*
* \return Nothing
*/
-static void bridge_channel_handle_write(struct ast_bridge_channel *bridge_channel)
+static void set_bridge_peer_vars_multiparty(struct ast_bridge *bridge)
{
- struct ast_frame *fr;
- char nudge;
+/*
+ * Set a maximum number of channel names for the BRIDGEPEER
+ * list. The plus one is for the current channel which is not
+ * put in the list.
+ */
+#define MAX_BRIDGEPEER_CHANS (10 + 1)
- ast_bridge_channel_lock(bridge_channel);
- if (read(bridge_channel->alert_pipe[0], &nudge, sizeof(nudge)) < 0) {
- if (errno != EINTR && errno != EAGAIN) {
- ast_log(LOG_WARNING, "read() failed for alert pipe on %p(%s): %s\n",
- bridge_channel, ast_channel_name(bridge_channel->chan), strerror(errno));
+ unsigned int idx;
+ unsigned int num_names;
+ unsigned int len;
+ const char **names;
+ char *buf;
+ struct ast_bridge_channel *bridge_channel;
+
+ /* Get first MAX_BRIDGEPEER_CHANS channel names. */
+ num_names = MIN(bridge->num_channels, MAX_BRIDGEPEER_CHANS);
+ names = ast_alloca(num_names * sizeof(*names));
+ idx = 0;
+ AST_LIST_TRAVERSE(&bridge->channels, bridge_channel, entry) {
+ if (num_names <= idx) {
+ break;
}
+ ast_channel_lock(bridge_channel->chan);
+ names[idx++] = ast_strdupa(ast_channel_name(bridge_channel->chan));
+ ast_channel_unlock(bridge_channel->chan);
}
- fr = AST_LIST_REMOVE_HEAD(&bridge_channel->wr_queue, frame_list);
- ast_bridge_channel_unlock(bridge_channel);
- if (!fr) {
- return;
- }
- switch (fr->frametype) {
- case AST_FRAME_BRIDGE_ACTION:
- bridge_channel_handle_action(bridge_channel, fr);
- break;
- case AST_FRAME_CONTROL:
- bridge_channel_handle_control(bridge_channel, fr);
- break;
- case AST_FRAME_NULL:
- break;
- default:
- /* Write the frame to the channel. */
- bridge_channel->activity = AST_BRIDGE_CHANNEL_THREAD_SIMPLE;
- ast_write(bridge_channel->chan, fr);
- break;
+
+ /* Determine maximum buf size needed. */
+ len = num_names;
+ for (idx = 0; idx < num_names; ++idx) {
+ len += strlen(names[idx]);
}
- ast_frfree(fr);
-}
+ buf = ast_alloca(len);
-/*!
- * \internal
- * \brief Handle bridge channel interval expiration.
- * \since 12.0.0
- *
- * \param bridge_channel Channel to check interval on.
- *
- * \return Nothing
- */
-static void bridge_channel_handle_interval(struct ast_bridge_channel *bridge_channel)
-{
- struct ast_timer *interval_timer;
-
- interval_timer = bridge_channel->features->interval_timer;
- if (interval_timer) {
- if (ast_wait_for_input(ast_timer_fd(interval_timer), 0) == 1) {
- ast_timer_ack(interval_timer, 1);
- if (bridge_channel_interval_ready(bridge_channel)) {
-/* BUGBUG since this is now only run by the channel thread, there is no need to queue the action once this intervals become a first class wait item in bridge_channel_wait(). */
- struct ast_frame interval_action = {
- .frametype = AST_FRAME_BRIDGE_ACTION,
- .subclass.integer = AST_BRIDGE_ACTION_INTERVAL,
- };
-
- ast_bridge_channel_queue_frame(bridge_channel, &interval_action);
- }
+ /* Set the bridge channel variables. */
+ idx = 0;
+ buf[0] = '\0';
+ AST_LIST_TRAVERSE(&bridge->channels, bridge_channel, entry) {
+ if (idx < num_names) {
+ fill_bridgepeer_buf(buf, idx, names, num_names);
}
+ ++idx;
+
+ ast_channel_lock(bridge_channel->chan);
+ update_bridge_vars_set(bridge_channel->chan, buf, NULL);
+ ast_channel_unlock(bridge_channel->chan);
}
}
/*!
* \internal
- * \brief Wait for something to happen on the bridge channel and handle it.
+ * \brief Set BRIDGEPEER and BRIDGEPVTCALLID channel variables in a holding bridge.
* \since 12.0.0
*
- * \param bridge_channel Channel to wait.
+ * \param bridge What to operate on.
*
- * \note Each channel does writing/reading in their own thread.
+ * \note On entry, the bridge is already locked.
*
* \return Nothing
*/
-static void bridge_channel_wait(struct ast_bridge_channel *bridge_channel)
+static void set_bridge_peer_vars_holding(struct ast_bridge *bridge)
{
- int ms = -1;
- int outfd;
- struct ast_channel *chan;
+ struct ast_bridge_channel *bridge_channel;
- /* Wait for data to either come from the channel or us to be signaled */
- ast_bridge_channel_lock(bridge_channel);
- if (bridge_channel->state != AST_BRIDGE_CHANNEL_STATE_WAIT) {
- } else if (bridge_channel->suspended) {
-/* BUGBUG the external party use of suspended will go away as will these references because this is the bridge channel thread */
- ast_debug(1, "Bridge %s: %p(%s) is going into a signal wait\n",
- bridge_channel->bridge->uniqueid, bridge_channel,
- ast_channel_name(bridge_channel->chan));
- ast_cond_wait(&bridge_channel->cond, ao2_object_get_lockaddr(bridge_channel));
- } else {
- ast_debug(10, "Bridge %s: %p(%s) is going into a waitfor\n",
- bridge_channel->bridge->uniqueid, bridge_channel,
- ast_channel_name(bridge_channel->chan));
- bridge_channel->waiting = 1;
- ast_bridge_channel_unlock(bridge_channel);
- outfd = -1;
-/* BUGBUG need to make the next expiring active interval setup ms timeout rather than holding up the chan reads. */
- chan = ast_waitfor_nandfds(&bridge_channel->chan, 1,
- &bridge_channel->alert_pipe[0], 1, NULL, &outfd, &ms);
- bridge_channel->waiting = 0;
- if (ast_channel_softhangup_internal_flag(bridge_channel->chan) & AST_SOFTHANGUP_UNBRIDGE) {
- ast_channel_clear_softhangup(bridge_channel->chan, AST_SOFTHANGUP_UNBRIDGE);
- ast_bridge_channel_lock_bridge(bridge_channel);
- bridge_channel->bridge->reconfigured = 1;
- bridge_reconfigured(bridge_channel->bridge, 0);
- ast_bridge_unlock(bridge_channel->bridge);
- }
- ast_bridge_channel_lock(bridge_channel);
- bridge_channel->activity = AST_BRIDGE_CHANNEL_THREAD_FRAME;
- ast_bridge_channel_unlock(bridge_channel);
- if (!bridge_channel->suspended
- && bridge_channel->state == AST_BRIDGE_CHANNEL_STATE_WAIT) {
- if (chan) {
- bridge_channel_handle_interval(bridge_channel);
- bridge_handle_trip(bridge_channel);
- } else if (-1 < outfd) {
- bridge_channel_handle_write(bridge_channel);
- }
- }
- bridge_channel->activity = AST_BRIDGE_CHANNEL_THREAD_IDLE;
- return;
+ AST_LIST_TRAVERSE(&bridge->channels, bridge_channel, entry) {
+ ast_channel_lock(bridge_channel->chan);
+ update_bridge_vars_set(bridge_channel->chan, NULL, NULL);
+ ast_channel_unlock(bridge_channel->chan);
}
- ast_bridge_channel_unlock(bridge_channel);
}
/*!
* \internal
- * \brief Handle bridge channel join event.
+ * \brief Set BRIDGEPEER and BRIDGEPVTCALLID channel variables in the bridge.
* \since 12.0.0
*
- * \param bridge_channel Which channel is joining.
+ * \param bridge What to operate on.
+ *
+ * \note On entry, the bridge is already locked.
*
* \return Nothing
*/
-static void bridge_channel_handle_join(struct ast_bridge_channel *bridge_channel)
+static void set_bridge_peer_vars(struct ast_bridge *bridge)
{
- struct ast_bridge_features *features = bridge_channel->features;
- struct ast_bridge_hook *hook;
- struct ao2_iterator iter;
-
- /* Run any join hooks. */
- iter = ao2_iterator_init(features->join_hooks, AO2_ITERATOR_UNLINK);
- hook = ao2_iterator_next(&iter);
- if (hook) {
- bridge_channel_suspend(bridge_channel);
- ast_indicate(bridge_channel->chan, AST_CONTROL_SRCUPDATE);
- do {
- hook->callback(bridge_channel->bridge, bridge_channel, hook->hook_pvt);
- ao2_ref(hook, -1);
- } while ((hook = ao2_iterator_next(&iter)));
- ast_indicate(bridge_channel->chan, AST_CONTROL_SRCUPDATE);
- bridge_channel_unsuspend(bridge_channel);
+ if (bridge->technology->capabilities & AST_BRIDGE_CAPABILITY_HOLDING) {
+ set_bridge_peer_vars_holding(bridge);
+ return;
+ }
+ if (bridge->num_channels < 2) {
+ return;
+ }
+ if (bridge->num_channels == 2) {
+ set_bridge_peer_vars_2party(AST_LIST_FIRST(&bridge->channels)->chan,
+ AST_LIST_LAST(&bridge->channels)->chan);
+ } else {
+ set_bridge_peer_vars_multiparty(bridge);
}
- ao2_iterator_destroy(&iter);
}
/*!
* \internal
- * \brief Handle bridge channel leave event.
+ * \brief Notify the bridge that it has been reconfigured.
* \since 12.0.0
*
- * \param bridge_channel Which channel is leaving.
+ * \param bridge Reconfigured bridge.
+ * \param colp_update Whether to perform COLP updates.
+ *
+ * \details
+ * After a series of bridge_channel_push and
+ * bridge_channel_pull calls, you need to call this function
+ * to cause the bridge to complete restructuring for the change
+ * in the channel makeup of the bridge.
+ *
+ * \note On entry, the bridge is already locked.
*
* \return Nothing
*/
-static void bridge_channel_handle_leave(struct ast_bridge_channel *bridge_channel)
-{
- struct ast_bridge_features *features = bridge_channel->features;
- struct ast_bridge_hook *hook;
- struct ao2_iterator iter;
-
- /* Run any leave hooks. */
- iter = ao2_iterator_init(features->leave_hooks, AO2_ITERATOR_UNLINK);
- hook = ao2_iterator_next(&iter);
- if (hook) {
- bridge_channel_suspend(bridge_channel);
- ast_indicate(bridge_channel->chan, AST_CONTROL_SRCUPDATE);
- do {
- hook->callback(bridge_channel->bridge, bridge_channel, hook->hook_pvt);
- ao2_ref(hook, -1);
- } while ((hook = ao2_iterator_next(&iter)));
- ast_indicate(bridge_channel->chan, AST_CONTROL_SRCUPDATE);
- bridge_channel_unsuspend(bridge_channel);
- }
- ao2_iterator_destroy(&iter);
-}
-
-/*! \brief Join a channel to a bridge and handle anything the bridge may want us to do */
-static void bridge_channel_join(struct ast_bridge_channel *bridge_channel)
+void bridge_reconfigured(struct ast_bridge *bridge, unsigned int colp_update)
{
- ast_format_copy(&bridge_channel->read_format, ast_channel_readformat(bridge_channel->chan));
- ast_format_copy(&bridge_channel->write_format, ast_channel_writeformat(bridge_channel->chan));
-
- ast_debug(1, "Bridge %s: %p(%s) is joining\n",
- bridge_channel->bridge->uniqueid,
- bridge_channel, ast_channel_name(bridge_channel->chan));
-
- /*
- * Get "in the bridge" before pushing the channel for any
- * masquerades on the channel to happen before bridging.
- */
- ast_channel_lock(bridge_channel->chan);
- ast_channel_internal_bridge_set(bridge_channel->chan, bridge_channel->bridge);
- ast_channel_unlock(bridge_channel->chan);
-
- /* Add the jitterbuffer if the channel requires it */
- ast_jb_enable_for_channel(bridge_channel->chan);
-
- /*
- * Directly locking the bridge is safe here because nobody else
- * knows about this bridge_channel yet.
- */
- ast_bridge_lock(bridge_channel->bridge);
-
- if (!bridge_channel->bridge->callid) {
- bridge_channel->bridge->callid = ast_read_threadstorage_callid();
- }
-
- if (bridge_channel_push(bridge_channel)) {
- ast_bridge_change_state(bridge_channel, AST_BRIDGE_CHANNEL_STATE_HANGUP);
+ if (!bridge->reconfigured) {
+ return;
}
- bridge_reconfigured(bridge_channel->bridge, 1);
-
- if (bridge_channel->state == AST_BRIDGE_CHANNEL_STATE_WAIT) {
- /*
- * Indicate a source change since this channel is entering the
- * bridge system only if the bridge technology is not MULTIMIX
- * capable. The MULTIMIX technology has already done it.
- */
- if (!(bridge_channel->bridge->technology->capabilities
- & AST_BRIDGE_CAPABILITY_MULTIMIX)) {
- ast_indicate(bridge_channel->chan, AST_CONTROL_SRCCHANGE);
- }
-
- ast_bridge_unlock(bridge_channel->bridge);
- bridge_channel_handle_join(bridge_channel);
- while (bridge_channel->state == AST_BRIDGE_CHANNEL_STATE_WAIT) {
- /* Wait for something to do. */
- bridge_channel_wait(bridge_channel);
- }
- bridge_channel_handle_leave(bridge_channel);
- ast_bridge_channel_lock_bridge(bridge_channel);
+ bridge->reconfigured = 0;
+ if (ast_test_flag(&bridge->feature_flags, AST_BRIDGE_FLAG_SMART)
+ && smart_bridge_operation(bridge)) {
+ /* Smart bridge failed. */
+ bridge_dissolve(bridge);
+ return;
}
+ bridge_complete_join(bridge);
- bridge_channel_pull(bridge_channel);
- bridge_reconfigured(bridge_channel->bridge, 1);
-
- ast_bridge_unlock(bridge_channel->bridge);
-
- /* Indicate a source change since this channel is leaving the bridge system. */
- ast_indicate(bridge_channel->chan, AST_CONTROL_SRCCHANGE);
-
-/* BUGBUG Revisit in regards to moving channels between bridges and local channel optimization. */
-/* BUGBUG This is where outgoing HOLD/UNHOLD memory should write UNHOLD to channel. */
- /* Complete any partial DTMF digit before exiting the bridge. */
- if (ast_channel_sending_dtmf_digit(bridge_channel->chan)) {
- ast_bridge_end_dtmf(bridge_channel->chan,
- ast_channel_sending_dtmf_digit(bridge_channel->chan),
- ast_channel_sending_dtmf_tv(bridge_channel->chan), "bridge end");
+ if (bridge->dissolved) {
+ return;
}
+ check_bridge_play_sounds(bridge);
+ set_bridge_peer_vars(bridge);
+ ast_bridge_publish_state(bridge);
- /*
- * Wait for any dual redirect to complete.
- *
- * Must be done while "still in the bridge" for ast_async_goto()
- * to work right.
- */
- while (ast_test_flag(ast_channel_flags(bridge_channel->chan), AST_FLAG_BRIDGE_DUAL_REDIRECT_WAIT)) {
- sched_yield();
+ if (colp_update) {
+ bridge_reconfigured_connected_line_update(bridge);
}
- ast_channel_lock(bridge_channel->chan);
- ast_channel_internal_bridge_set(bridge_channel->chan, NULL);
- ast_channel_unlock(bridge_channel->chan);
-
- ast_bridge_channel_restore_formats(bridge_channel);
}
/*!
@@ -3872,7 +2125,7 @@ void ast_bridge_notify_masquerade(struct ast_channel *chan)
ast_bridge_channel_lock_bridge(bridge_channel);
bridge = bridge_channel->bridge;
- if (bridge_channel == find_bridge_channel(bridge, chan)) {
+ if (bridge_channel == bridge_find_channel(bridge, chan)) {
/* BUGBUG this needs more work. The channels need to be made compatible again if the formats change. The bridge_channel thread needs to monitor for this case. */
/* The channel we want to notify is still in a bridge. */
bridge->v_table->notify_masquerade(bridge, bridge_channel);
@@ -4120,7 +2373,7 @@ int ast_bridge_remove(struct ast_bridge *bridge, struct ast_channel *chan)
ast_bridge_lock(bridge);
/* Try to find the channel that we want to remove */
- if (!(bridge_channel = find_bridge_channel(bridge, chan))) {
+ if (!(bridge_channel = bridge_find_channel(bridge, chan))) {
ast_bridge_unlock(bridge);
return -1;
}
@@ -4157,7 +2410,7 @@ static void bridge_channel_change_bridge(struct ast_bridge_channel *bridge_chann
ao2_ref(old_bridge, -1);
}
-void bridge_merge_do(struct ast_bridge *dst_bridge, struct ast_bridge *src_bridge, struct ast_bridge_channel **kick_me, unsigned int num_kick,
+void bridge_do_merge(struct ast_bridge *dst_bridge, struct ast_bridge *src_bridge, struct ast_bridge_channel **kick_me, unsigned int num_kick,
unsigned int optimized)
{
struct ast_bridge_channel *bridge_channel;
@@ -4382,9 +2635,9 @@ static int bridge_merge_locked(struct ast_bridge *dst_bridge, struct ast_bridge
kick_them = ast_alloca(num_kick * sizeof(*kick_them));
for (idx = 0; idx < num_kick; ++idx) {
- kick_them[num_to_kick] = find_bridge_channel(merge.src, kick_me[idx]);
+ kick_them[num_to_kick] = bridge_find_channel(merge.src, kick_me[idx]);
if (!kick_them[num_to_kick]) {
- kick_them[num_to_kick] = find_bridge_channel(merge.dest, kick_me[idx]);
+ kick_them[num_to_kick] = bridge_find_channel(merge.dest, kick_me[idx]);
}
if (kick_them[num_to_kick]) {
++num_to_kick;
@@ -4398,7 +2651,7 @@ static int bridge_merge_locked(struct ast_bridge *dst_bridge, struct ast_bridge
}
}
- bridge_merge_do(merge.dest, merge.src, kick_them, num_kick, 0);
+ bridge_do_merge(merge.dest, merge.src, kick_them, num_kick, 0);
return 0;
}
@@ -4416,7 +2669,7 @@ int ast_bridge_merge(struct ast_bridge *dst_bridge, struct ast_bridge *src_bridg
return res;
}
-int bridge_move_do(struct ast_bridge *dst_bridge, struct ast_bridge_channel *bridge_channel, int attempt_recovery,
+int bridge_do_move(struct ast_bridge *dst_bridge, struct ast_bridge_channel *bridge_channel, int attempt_recovery,
unsigned int optimized)
{
struct ast_bridge *orig_bridge;
@@ -4508,7 +2761,7 @@ static int bridge_move_locked(struct ast_bridge *dst_bridge, struct ast_bridge *
return -1;
}
- bridge_channel = find_bridge_channel(src_bridge, chan);
+ bridge_channel = bridge_find_channel(src_bridge, chan);
if (!bridge_channel) {
ast_debug(1, "Can't move channel %s from bridge %s into bridge %s, channel not in bridge.\n",
ast_channel_name(chan), src_bridge->uniqueid, dst_bridge->uniqueid);
@@ -4529,7 +2782,7 @@ static int bridge_move_locked(struct ast_bridge *dst_bridge, struct ast_bridge *
if (swap) {
struct ast_bridge_channel *bridge_channel_swap;
- bridge_channel_swap = find_bridge_channel(dst_bridge, swap);
+ bridge_channel_swap = bridge_find_channel(dst_bridge, swap);
if (!bridge_channel_swap) {
ast_debug(1, "Can't move channel %s from bridge %s into bridge %s, swap channel %s not in bridge.\n",
ast_channel_name(chan), src_bridge->uniqueid, dst_bridge->uniqueid,
@@ -4545,7 +2798,7 @@ static int bridge_move_locked(struct ast_bridge *dst_bridge, struct ast_bridge *
}
bridge_channel->swap = swap;
- return bridge_move_do(dst_bridge, bridge_channel, attempt_recovery, 0);
+ return bridge_do_move(dst_bridge, bridge_channel, attempt_recovery, 0);
}
int ast_bridge_move(struct ast_bridge *dst_bridge, struct ast_bridge *src_bridge, struct ast_channel *chan, struct ast_channel *swap, int attempt_recovery)
@@ -4573,7 +2826,7 @@ int ast_bridge_add_channel(struct ast_bridge *bridge, struct ast_channel *chan,
RAII_VAR(struct ast_bridge_channel *, bridge_channel, NULL, ao2_cleanup);
ast_bridge_lock_both(bridge, chan_bridge);
- bridge_channel = find_bridge_channel(chan_bridge, chan);
+ bridge_channel = bridge_find_channel(chan_bridge, chan);
if (bridge_move_locked(bridge, chan_bridge, chan, NULL, 1)) {
ast_bridge_unlock(chan_bridge);
ast_bridge_unlock(bridge);
@@ -4634,22 +2887,6 @@ int ast_bridge_add_channel(struct ast_bridge *bridge, struct ast_channel *chan,
return 0;
}
-struct ast_bridge_channel *ast_bridge_channel_peer(struct ast_bridge_channel *bridge_channel)
-{
- struct ast_bridge *bridge = bridge_channel->bridge;
- struct ast_bridge_channel *other = NULL;
-
- if (bridge_channel->in_bridge && bridge->num_channels == 2) {
- AST_LIST_TRAVERSE(&bridge->channels, other, entry) {
- if (other != bridge_channel) {
- break;
- }
- }
- }
-
- return other;
-}
-
static int bridge_allows_optimization(struct ast_bridge *bridge)
{
return !(bridge->inhibit_merge
@@ -4873,7 +3110,7 @@ static int try_swap_optimize_out(struct ast_bridge *chan_bridge,
ast_set_flag(pvt, AST_UNREAL_OPTIMIZE_BEGUN);
}
other->swap = dst_bridge_channel->chan;
- if (!bridge_move_do(dst_bridge, other, 1, 1)) {
+ if (!bridge_do_move(dst_bridge, other, 1, 1)) {
ast_bridge_change_state(src_bridge_channel, AST_BRIDGE_CHANNEL_STATE_HANGUP);
res = -1;
if (pvt && pvt->callbacks && pvt->callbacks->optimization_finished) {
@@ -4984,7 +3221,7 @@ static int try_merge_optimize_out(struct ast_bridge *chan_bridge,
pvt->callbacks->optimization_started(pvt);
ast_set_flag(pvt, AST_UNREAL_OPTIMIZE_BEGUN);
}
- bridge_merge_do(merge.dest, merge.src, kick_me, ARRAY_LEN(kick_me), 1);
+ bridge_do_merge(merge.dest, merge.src, kick_me, ARRAY_LEN(kick_me), 1);
if (pvt && pvt->callbacks && pvt->callbacks->optimization_finished) {
pvt->callbacks->optimization_finished(pvt);
}
@@ -5076,7 +3313,7 @@ enum ast_bridge_optimization ast_bridges_allow_optimization(struct ast_bridge *c
*
* \return Nothing
*/
-static void bridge_merge_inhibit_nolock(struct ast_bridge *bridge, int request)
+void bridge_merge_inhibit_nolock(struct ast_bridge *bridge, int request)
{
int new_request;
@@ -5092,18 +3329,6 @@ void ast_bridge_merge_inhibit(struct ast_bridge *bridge, int request)
ast_bridge_unlock(bridge);
}
-struct ast_bridge *ast_bridge_channel_merge_inhibit(struct ast_bridge_channel *bridge_channel, int request)
-{
- struct ast_bridge *bridge;
-
- ast_bridge_channel_lock_bridge(bridge_channel);
- bridge = bridge_channel->bridge;
- ao2_ref(bridge, +1);
- bridge_merge_inhibit_nolock(bridge, request);
- ast_bridge_unlock(bridge);
- return bridge;
-}
-
int ast_bridge_suspend(struct ast_bridge *bridge, struct ast_channel *chan)
{
struct ast_bridge_channel *bridge_channel;
@@ -5113,7 +3338,7 @@ int ast_bridge_suspend(struct ast_bridge *bridge, struct ast_channel *chan)
ast_bridge_lock(bridge);
- if (!(bridge_channel = find_bridge_channel(bridge, chan))) {
+ if (!(bridge_channel = bridge_find_channel(bridge, chan))) {
ast_bridge_unlock(bridge);
return -1;
}
@@ -5132,7 +3357,7 @@ int ast_bridge_unsuspend(struct ast_bridge *bridge, struct ast_channel *chan)
ast_bridge_lock(bridge);
- if (!(bridge_channel = find_bridge_channel(bridge, chan))) {
+ if (!(bridge_channel = bridge_find_channel(bridge, chan))) {
ast_bridge_unlock(bridge);
return -1;
}
@@ -6622,7 +4847,7 @@ static enum ast_transfer_result bridge_swap_attended_transfer(struct ast_bridge
&& !ast_test_flag(&bridged_to_source->features->feature_flags,
AST_BRIDGE_CHANNEL_FLAG_IMMOVABLE)) {
bridged_to_source->swap = swap_channel;
- if (bridge_move_do(dest_bridge, bridged_to_source, 1, 0)) {
+ if (bridge_do_move(dest_bridge, bridged_to_source, 1, 0)) {
return AST_BRIDGE_TRANSFER_FAIL;
}
/* Must kick the source channel out of its bridge. */
@@ -6678,12 +4903,12 @@ static enum ast_transfer_result two_bridge_attended_transfer(struct ast_channel
goto end;
case AST_BRIDGE_OPTIMIZE_MERGE_TO_CHAN_BRIDGE:
final_bridge = to_transferee_bridge;
- bridge_merge_do(to_transferee_bridge, to_target_bridge, kick_me, ARRAY_LEN(kick_me), 0);
+ bridge_do_merge(to_transferee_bridge, to_target_bridge, kick_me, ARRAY_LEN(kick_me), 0);
res = AST_BRIDGE_TRANSFER_SUCCESS;
goto end;
case AST_BRIDGE_OPTIMIZE_MERGE_TO_PEER_BRIDGE:
final_bridge = to_target_bridge;
- bridge_merge_do(to_target_bridge, to_transferee_bridge, kick_me, ARRAY_LEN(kick_me), 0);
+ bridge_do_merge(to_target_bridge, to_transferee_bridge, kick_me, ARRAY_LEN(kick_me), 0);
res = AST_BRIDGE_TRANSFER_SUCCESS;
goto end;
case AST_BRIDGE_OPTIMIZE_PROHIBITED:
diff --git a/main/bridging_basic.c b/main/bridging_basic.c
index 3353066853..27cbce35ce 100644
--- a/main/bridging_basic.c
+++ b/main/bridging_basic.c
@@ -42,6 +42,7 @@ ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
#include "asterisk/file.h"
#include "asterisk/app.h"
#include "asterisk/bridging_internal.h"
+#include "asterisk/bridging_channel_internal.h"
#include "asterisk/dial.h"
#include "asterisk/stasis_bridging.h"
@@ -341,8 +342,8 @@ static int bridge_personality_normal_push(struct ast_bridge *self, struct ast_br
return -1;
}
- ast_bridge_update_accountcodes(self, bridge_channel, swap);
- ast_bridge_update_linkedids(self, bridge_channel, swap);
+ bridge_channel_update_accountcodes(bridge_channel, swap);
+ bridge_channel_update_linkedids(bridge_channel, swap);
return 0;
}
@@ -1367,7 +1368,7 @@ static void bridge_unhold(struct ast_bridge *bridge)
}
/*!
- * \brief Wrapper for \ref bridge_move_do
+ * \brief Wrapper for \ref bridge_do_move
*/
static int bridge_move(struct ast_bridge *dest, struct ast_bridge *src, struct ast_channel *channel, struct ast_channel *swap)
{
@@ -1386,7 +1387,7 @@ static int bridge_move(struct ast_bridge *dest, struct ast_bridge *src, struct a
bridge_channel->swap = swap;
ao2_unlock(bridge_channel);
- res = bridge_move_do(dest, bridge_channel, 1, 0);
+ res = bridge_do_move(dest, bridge_channel, 1, 0);
ast_bridge_unlock(dest);
ast_bridge_unlock(src);
@@ -1395,7 +1396,7 @@ static int bridge_move(struct ast_bridge *dest, struct ast_bridge *src, struct a
}
/*!
- * \brief Wrapper for \ref bridge_merge_do
+ * \brief Wrapper for \ref bridge_do_merge
*/
static void bridge_merge(struct ast_bridge *dest, struct ast_bridge *src, struct ast_channel **kick_channels, unsigned int num_channels)
{
@@ -1409,9 +1410,9 @@ static void bridge_merge(struct ast_bridge *dest, struct ast_bridge *src, struct
for (i = 0; i < num_channels; ++i) {
struct ast_bridge_channel *kick_bridge_channel;
- kick_bridge_channel = find_bridge_channel(src, kick_channels[i]);
+ kick_bridge_channel = bridge_find_channel(src, kick_channels[i]);
if (!kick_bridge_channel) {
- kick_bridge_channel = find_bridge_channel(dest, kick_channels[i]);
+ 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
@@ -1425,7 +1426,7 @@ static void bridge_merge(struct ast_bridge *dest, struct ast_bridge *src, struct
kick_bridge_channels[num_bridge_channels++] = kick_bridge_channel;
}
- bridge_merge_do(dest, src, kick_bridge_channels, num_bridge_channels, 0);
+ bridge_do_merge(dest, src, kick_bridge_channels, num_bridge_channels, 0);
ast_bridge_unlock(dest);
ast_bridge_unlock(src);
}
@@ -2658,7 +2659,7 @@ static int feature_attended_transfer(struct ast_bridge *bridge, struct ast_bridg
}
ast_bridge_channel_write_hold(bridge_channel, NULL);
- props->transferee_bridge = ast_bridge_channel_merge_inhibit(bridge_channel, +1);
+ props->transferee_bridge = bridge_channel_merge_inhibit(bridge_channel, +1);
/* Grab the extension to transfer to */
if (grab_transfer(bridge_channel->chan, exten, sizeof(exten), props->context)) {
@@ -2900,12 +2901,12 @@ struct ast_bridge *ast_bridge_basic_new(void)
{
struct ast_bridge *bridge;
- bridge = ast_bridge_alloc(sizeof(struct ast_bridge), &ast_bridge_basic_v_table);
- bridge = ast_bridge_base_init(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);
bridge = bridge_basic_personality_alloc(bridge);
- bridge = ast_bridge_register(bridge);
+ bridge = bridge_register(bridge);
return bridge;
}
diff --git a/main/bridging_channel.c b/main/bridging_channel.c
new file mode 100644
index 0000000000..4500dfb79d
--- /dev/null
+++ b/main/bridging_channel.c
@@ -0,0 +1,1838 @@
+/*
+ * Asterisk -- An open source telephony toolkit.
+ *
+ * Copyright (C) 2007 - 2009, Digium, Inc.
+ *
+ * Joshua Colp <jcolp@digium.com>
+ *
+ * See http://www.asterisk.org for more information about
+ * the Asterisk project. Please do not directly contact
+ * any of the maintainers of this project for assistance;
+ * the project provides a web site, mailing lists and IRC
+ * channels for your use.
+ *
+ * This program is free software, distributed under the terms of
+ * the GNU General Public License Version 2. See the LICENSE file
+ * at the top of the source tree.
+ */
+
+/*! \file
+ *
+ * \brief Bridging Channel API
+ *
+ * \author Joshua Colp <jcolp@digium.com>
+ * \author Richard Mudgett <rmudgett@digium.com>
+ * \author Matt Jordan <mjordan@digium.com>
+ *
+ */
+
+/*** MODULEINFO
+ <support_level>core</support_level>
+ ***/
+
+#include "asterisk.h"
+
+ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
+
+#include <signal.h>
+
+#include "asterisk/heap.h"
+#include "asterisk/astobj2.h"
+#include "asterisk/stringfields.h"
+#include "asterisk/app.h"
+#include "asterisk/pbx.h"
+#include "asterisk/channel.h"
+#include "asterisk/timing.h"
+#include "asterisk/bridging.h"
+#include "asterisk/bridging_channel.h"
+#include "asterisk/bridging_channel_internal.h"
+#include "asterisk/bridging_internal.h"
+#include "asterisk/stasis_bridging.h"
+#include "asterisk/stasis_channels.h"
+#include "asterisk/musiconhold.h"
+#include "asterisk/features_config.h"
+#include "asterisk/parking.h"
+
+
+struct ast_bridge *bridge_channel_merge_inhibit(struct ast_bridge_channel *bridge_channel, int request)
+{
+ struct ast_bridge *bridge;
+
+ ast_bridge_channel_lock_bridge(bridge_channel);
+ bridge = bridge_channel->bridge;
+ ao2_ref(bridge, +1);
+ bridge_merge_inhibit_nolock(bridge, request);
+ ast_bridge_unlock(bridge);
+ return bridge;
+}
+
+void ast_bridge_channel_lock_bridge(struct ast_bridge_channel *bridge_channel)
+{
+ struct ast_bridge *bridge;
+
+ for (;;) {
+ /* Safely get the bridge pointer */
+ ast_bridge_channel_lock(bridge_channel);
+ bridge = bridge_channel->bridge;
+ ao2_ref(bridge, +1);
+ ast_bridge_channel_unlock(bridge_channel);
+
+ /* Lock the bridge and see if it is still the bridge we need to lock. */
+ ast_bridge_lock(bridge);
+ if (bridge == bridge_channel->bridge) {
+ ao2_ref(bridge, -1);
+ return;
+ }
+ ast_bridge_unlock(bridge);
+ ao2_ref(bridge, -1);
+ }
+}
+
+static void bridge_channel_poke(struct ast_bridge_channel *bridge_channel)
+{
+ if (!pthread_equal(pthread_self(), bridge_channel->thread)) {
+ while (bridge_channel->waiting) {
+ pthread_kill(bridge_channel->thread, SIGURG);
+ sched_yield();
+ }
+ }
+}
+
+void ast_bridge_change_state_nolock(struct ast_bridge_channel *bridge_channel, enum ast_bridge_channel_state new_state)
+{
+/* BUGBUG need cause code for the bridge_channel leaving the bridge. */
+ if (bridge_channel->state != AST_BRIDGE_CHANNEL_STATE_WAIT) {
+ return;
+ }
+
+ ast_debug(1, "Setting %p(%s) state from:%d to:%d\n",
+ bridge_channel, ast_channel_name(bridge_channel->chan), bridge_channel->state,
+ new_state);
+
+ /* Change the state on the bridge channel */
+ bridge_channel->state = new_state;
+
+ bridge_channel_poke(bridge_channel);
+}
+
+void ast_bridge_change_state(struct ast_bridge_channel *bridge_channel, enum ast_bridge_channel_state new_state)
+{
+ ast_bridge_channel_lock(bridge_channel);
+ ast_bridge_change_state_nolock(bridge_channel, new_state);
+ ast_bridge_channel_unlock(bridge_channel);
+}
+
+void bridge_channel_update_accountcodes(struct ast_bridge_channel *bridge_channel, struct ast_bridge_channel *swap)
+{
+ struct ast_bridge *bridge = bridge_channel->bridge;
+ struct ast_bridge_channel *other = NULL;
+
+ AST_LIST_TRAVERSE(&bridge->channels, other, entry) {
+ if (other == swap) {
+ continue;
+ }
+
+ if (!ast_strlen_zero(ast_channel_accountcode(bridge_channel->chan)) && ast_strlen_zero(ast_channel_peeraccount(other->chan))) {
+ ast_debug(1, "Setting peeraccount to %s for %s from data on channel %s\n",
+ ast_channel_accountcode(bridge_channel->chan), ast_channel_name(other->chan), ast_channel_name(bridge_channel->chan));
+ ast_channel_peeraccount_set(other->chan, ast_channel_accountcode(bridge_channel->chan));
+ }
+ if (!ast_strlen_zero(ast_channel_accountcode(other->chan)) && ast_strlen_zero(ast_channel_peeraccount(bridge_channel->chan))) {
+ ast_debug(1, "Setting peeraccount to %s for %s from data on channel %s\n",
+ ast_channel_accountcode(other->chan), ast_channel_name(bridge_channel->chan), ast_channel_name(other->chan));
+ ast_channel_peeraccount_set(bridge_channel->chan, ast_channel_accountcode(other->chan));
+ }
+ if (!ast_strlen_zero(ast_channel_peeraccount(bridge_channel->chan)) && ast_strlen_zero(ast_channel_accountcode(other->chan))) {
+ ast_debug(1, "Setting accountcode to %s for %s from data on channel %s\n",
+ ast_channel_peeraccount(bridge_channel->chan), ast_channel_name(other->chan), ast_channel_name(bridge_channel->chan));
+ ast_channel_accountcode_set(other->chan, ast_channel_peeraccount(bridge_channel->chan));
+ }
+ if (!ast_strlen_zero(ast_channel_peeraccount(other->chan)) && ast_strlen_zero(ast_channel_accountcode(bridge_channel->chan))) {
+ ast_debug(1, "Setting accountcode to %s for %s from data on channel %s\n",
+ ast_channel_peeraccount(other->chan), ast_channel_name(bridge_channel->chan), ast_channel_name(other->chan));
+ ast_channel_accountcode_set(bridge_channel->chan, ast_channel_peeraccount(other->chan));
+ }
+ if (bridge->num_channels == 2) {
+ if (strcmp(ast_channel_accountcode(bridge_channel->chan), ast_channel_peeraccount(other->chan))) {
+ ast_debug(1, "Changing peeraccount from %s to %s on %s to match channel %s\n",
+ ast_channel_peeraccount(other->chan), ast_channel_peeraccount(bridge_channel->chan), ast_channel_name(other->chan), ast_channel_name(bridge_channel->chan));
+ ast_channel_peeraccount_set(other->chan, ast_channel_accountcode(bridge_channel->chan));
+ }
+ if (strcmp(ast_channel_accountcode(other->chan), ast_channel_peeraccount(bridge_channel->chan))) {
+ ast_debug(1, "Changing peeraccount from %s to %s on %s to match channel %s\n",
+ ast_channel_peeraccount(bridge_channel->chan), ast_channel_peeraccount(other->chan), ast_channel_name(bridge_channel->chan), ast_channel_name(other->chan));
+ ast_channel_peeraccount_set(bridge_channel->chan, ast_channel_accountcode(other->chan));
+ }
+ }
+ }
+}
+
+void bridge_channel_update_linkedids(struct ast_bridge_channel *bridge_channel, struct ast_bridge_channel *swap)
+{
+ struct ast_bridge_channel *other = NULL;
+ struct ast_bridge *bridge = bridge_channel->bridge;
+ const char *oldest_linkedid = ast_channel_linkedid(bridge_channel->chan);
+
+ AST_LIST_TRAVERSE(&bridge->channels, other, entry) {
+ if (other == swap) {
+ continue;
+ }
+ oldest_linkedid = ast_channel_oldest_linkedid(oldest_linkedid, ast_channel_linkedid(other->chan));
+ }
+
+ if (ast_strlen_zero(oldest_linkedid)) {
+ return;
+ }
+
+ ast_channel_linkedid_set(bridge_channel->chan, oldest_linkedid);
+ AST_LIST_TRAVERSE(&bridge->channels, other, entry) {
+ if (other == swap) {
+ continue;
+ }
+ ast_channel_linkedid_set(other->chan, oldest_linkedid);
+ }
+}
+
+int ast_bridge_channel_queue_frame(struct ast_bridge_channel *bridge_channel, struct ast_frame *fr)
+{
+ struct ast_frame *dup;
+ char nudge = 0;
+
+ if (bridge_channel->suspended
+ /* Also defer DTMF frames. */
+ && fr->frametype != AST_FRAME_DTMF_BEGIN
+ && fr->frametype != AST_FRAME_DTMF_END
+ && !ast_is_deferrable_frame(fr)) {
+ /* Drop non-deferable frames when suspended. */
+ return 0;
+ }
+ if (fr->frametype == AST_FRAME_NULL) {
+ /* "Accept" the frame and discard it. */
+ return 0;
+ }
+
+ dup = ast_frdup(fr);
+ if (!dup) {
+ return -1;
+ }
+
+ ast_bridge_channel_lock(bridge_channel);
+ if (bridge_channel->state != AST_BRIDGE_CHANNEL_STATE_WAIT) {
+ /* Drop frames on channels leaving the bridge. */
+ ast_bridge_channel_unlock(bridge_channel);
+ ast_frfree(dup);
+ return 0;
+ }
+
+ AST_LIST_INSERT_TAIL(&bridge_channel->wr_queue, dup, frame_list);
+ if (write(bridge_channel->alert_pipe[1], &nudge, sizeof(nudge)) != sizeof(nudge)) {
+ ast_log(LOG_ERROR, "We couldn't write alert pipe for %p(%s)... something is VERY wrong\n",
+ bridge_channel, ast_channel_name(bridge_channel->chan));
+ }
+ ast_bridge_channel_unlock(bridge_channel);
+ return 0;
+}
+
+int ast_bridge_channel_queue_action_data(struct ast_bridge_channel *bridge_channel, enum ast_bridge_action_type action, const void *data, size_t datalen)
+{
+ struct ast_frame frame = {
+ .frametype = AST_FRAME_BRIDGE_ACTION,
+ .subclass.integer = action,
+ .datalen = datalen,
+ .data.ptr = (void *) data,
+ };
+
+ return ast_bridge_channel_queue_frame(bridge_channel, &frame);
+}
+
+int ast_bridge_channel_queue_control_data(struct ast_bridge_channel *bridge_channel, enum ast_control_frame_type control, const void *data, size_t datalen)
+{
+ struct ast_frame frame = {
+ .frametype = AST_FRAME_CONTROL,
+ .subclass.integer = control,
+ .datalen = datalen,
+ .data.ptr = (void *) data,
+ };
+
+ return ast_bridge_channel_queue_frame(bridge_channel, &frame);
+}
+
+int ast_bridge_queue_everyone_else(struct ast_bridge *bridge, struct ast_bridge_channel *bridge_channel, struct ast_frame *frame)
+{
+ struct ast_bridge_channel *cur;
+ int not_written = -1;
+
+ if (frame->frametype == AST_FRAME_NULL) {
+ /* "Accept" the frame and discard it. */
+ return 0;
+ }
+
+ AST_LIST_TRAVERSE(&bridge->channels, cur, entry) {
+ if (cur == bridge_channel) {
+ continue;
+ }
+ if (!ast_bridge_channel_queue_frame(cur, frame)) {
+ not_written = 0;
+ }
+ }
+ return not_written;
+}
+
+void ast_bridge_channel_restore_formats(struct ast_bridge_channel *bridge_channel)
+{
+ /* Restore original formats of the channel as they came in */
+ if (ast_format_cmp(ast_channel_readformat(bridge_channel->chan), &bridge_channel->read_format) == AST_FORMAT_CMP_NOT_EQUAL) {
+ ast_debug(1, "Bridge is returning %p(%s) to read format %s\n",
+ bridge_channel, ast_channel_name(bridge_channel->chan),
+ ast_getformatname(&bridge_channel->read_format));
+ if (ast_set_read_format(bridge_channel->chan, &bridge_channel->read_format)) {
+ ast_debug(1, "Bridge failed to return %p(%s) to read format %s\n",
+ bridge_channel, ast_channel_name(bridge_channel->chan),
+ ast_getformatname(&bridge_channel->read_format));
+ }
+ }
+ if (ast_format_cmp(ast_channel_writeformat(bridge_channel->chan), &bridge_channel->write_format) == AST_FORMAT_CMP_NOT_EQUAL) {
+ ast_debug(1, "Bridge is returning %p(%s) to write format %s\n",
+ bridge_channel, ast_channel_name(bridge_channel->chan),
+ ast_getformatname(&bridge_channel->write_format));
+ if (ast_set_write_format(bridge_channel->chan, &bridge_channel->write_format)) {
+ ast_debug(1, "Bridge failed to return %p(%s) to write format %s\n",
+ bridge_channel, ast_channel_name(bridge_channel->chan),
+ ast_getformatname(&bridge_channel->write_format));
+ }
+ }
+}
+
+static int bridge_channel_write_frame(struct ast_bridge_channel *bridge_channel, struct ast_frame *frame)
+{
+ ast_bridge_channel_lock_bridge(bridge_channel);
+/*
+ * BUGBUG need to implement a deferred write queue for when there is no peer channel in the bridge (yet or it was kicked).
+ *
+ * The tech decides if a frame needs to be pushed back for deferral.
+ * simple_bridge/native_bridge are likely the only techs that will do this.
+ */
+ bridge_channel->bridge->technology->write(bridge_channel->bridge, bridge_channel, frame);
+ ast_bridge_unlock(bridge_channel->bridge);
+
+ /*
+ * Claim successful write to bridge. If deferred frame
+ * support is added, claim successfully deferred.
+ */
+ return 0;
+}
+
+int ast_bridge_channel_write_action_data(struct ast_bridge_channel *bridge_channel, enum ast_bridge_action_type action, const void *data, size_t datalen)
+{
+ struct ast_frame frame = {
+ .frametype = AST_FRAME_BRIDGE_ACTION,
+ .subclass.integer = action,
+ .datalen = datalen,
+ .data.ptr = (void *) data,
+ };
+
+ return bridge_channel_write_frame(bridge_channel, &frame);
+}
+
+int ast_bridge_channel_write_control_data(struct ast_bridge_channel *bridge_channel, enum ast_control_frame_type control, const void *data, size_t datalen)
+{
+ struct ast_frame frame = {
+ .frametype = AST_FRAME_CONTROL,
+ .subclass.integer = control,
+ .datalen = datalen,
+ .data.ptr = (void *) data,
+ };
+
+ return bridge_channel_write_frame(bridge_channel, &frame);
+}
+
+int ast_bridge_channel_write_hold(struct ast_bridge_channel *bridge_channel, const char *moh_class)
+{
+ RAII_VAR(struct ast_json *, blob, NULL, ast_json_unref);
+ size_t datalen;
+
+ if (!ast_strlen_zero(moh_class)) {
+ datalen = strlen(moh_class) + 1;
+
+ blob = ast_json_pack("{s: s}",
+ "musicclass", moh_class);
+ } else {
+ moh_class = NULL;
+ datalen = 0;
+ }
+
+ ast_channel_publish_blob(bridge_channel->chan, ast_channel_hold_type(), blob);
+ return ast_bridge_channel_write_control_data(bridge_channel, AST_CONTROL_HOLD,
+ moh_class, datalen);
+}
+
+int ast_bridge_channel_write_unhold(struct ast_bridge_channel *bridge_channel)
+{
+ ast_channel_publish_blob(bridge_channel->chan, ast_channel_unhold_type(), NULL);
+ return ast_bridge_channel_write_control_data(bridge_channel, AST_CONTROL_UNHOLD, NULL, 0);
+}
+
+static int run_app_helper(struct ast_channel *chan, const char *app_name, const char *app_args)
+{
+ int res = 0;
+
+ if (!strcasecmp("Gosub", app_name)) {
+ ast_app_exec_sub(NULL, chan, app_args, 0);
+ } else if (!strcasecmp("Macro", app_name)) {
+ ast_app_exec_macro(NULL, chan, app_args);
+ } else {
+ struct ast_app *app;
+
+ app = pbx_findapp(app_name);
+ if (!app) {
+ ast_log(LOG_WARNING, "Could not find application (%s)\n", app_name);
+ } else {
+ res = pbx_exec(chan, app, app_args);
+ }
+ }
+ return res;
+}
+
+/*!
+* \internal
+* \brief Handle bridge hangup event.
+* \since 12.0.0
+*
+* \param bridge_channel Which channel is hanging up.
+*
+* \return Nothing
+*/
+static void bridge_channel_handle_hangup(struct ast_bridge_channel *bridge_channel)
+{
+ struct ast_bridge_features *features = bridge_channel->features;
+ struct ast_bridge_hook *hook;
+ struct ao2_iterator iter;
+
+ /* Run any hangup hooks. */
+ iter = ao2_iterator_init(features->hangup_hooks, 0);
+ for (; (hook = ao2_iterator_next(&iter)); ao2_ref(hook, -1)) {
+ int remove_me;
+
+ remove_me = hook->callback(bridge_channel->bridge, bridge_channel, hook->hook_pvt);
+ if (remove_me) {
+ ast_debug(1, "Hangup hook %p is being removed from %p(%s)\n",
+ hook, bridge_channel, ast_channel_name(bridge_channel->chan));
+ ao2_unlink(features->hangup_hooks, hook);
+ }
+ }
+ ao2_iterator_destroy(&iter);
+
+ /* Default hangup action. */
+ ast_bridge_change_state(bridge_channel, AST_BRIDGE_CHANNEL_STATE_END);
+}
+
+void ast_bridge_channel_run_app(struct ast_bridge_channel *bridge_channel, const char *app_name, const char *app_args, const char *moh_class)
+{
+ if (moh_class) {
+ ast_bridge_channel_write_hold(bridge_channel, moh_class);
+ }
+ if (run_app_helper(bridge_channel->chan, app_name, S_OR(app_args, ""))) {
+ /* Break the bridge if the app returns non-zero. */
+ bridge_channel_handle_hangup(bridge_channel);
+ }
+ if (moh_class) {
+ ast_bridge_channel_write_unhold(bridge_channel);
+ }
+}
+
+
+struct bridge_run_app {
+ /*! Offset into app_name[] where the MOH class name starts. (zero if no MOH) */
+ int moh_offset;
+ /*! Offset into app_name[] where the application argument string starts. (zero if no arguments) */
+ int app_args_offset;
+ /*! Application name to run. */
+ char app_name[0];
+};
+
+/*!
+ * \internal
+ * \brief Handle the run application bridge action.
+ * \since 12.0.0
+ *
+ * \param bridge_channel Which channel to run the application on.
+ * \param data Action frame data to run the application.
+ *
+ * \return Nothing
+ */
+static void bridge_channel_run_app(struct ast_bridge_channel *bridge_channel, struct bridge_run_app *data)
+{
+ ast_bridge_channel_run_app(bridge_channel, data->app_name,
+ data->app_args_offset ? &data->app_name[data->app_args_offset] : NULL,
+ data->moh_offset ? &data->app_name[data->moh_offset] : NULL);
+}
+
+static int payload_helper_app(ast_bridge_channel_post_action_data post_it,
+ struct ast_bridge_channel *bridge_channel, const char *app_name, const char *app_args, const char *moh_class)
+{
+ struct bridge_run_app *app_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 = !moh_class ? 0 : strlen(moh_class) + 1;
+ size_t len_data = sizeof(*app_data) + len_name + len_args + len_moh;
+
+ /* Fill in application run frame data. */
+ app_data = alloca(len_data);
+ app_data->app_args_offset = len_args ? len_name : 0;
+ app_data->moh_offset = len_moh ? len_name + len_args : 0;
+ strcpy(app_data->app_name, app_name);/* Safe */
+ if (len_args) {
+ strcpy(&app_data->app_name[app_data->app_args_offset], app_args);/* Safe */
+ }
+ if (moh_class) {
+ strcpy(&app_data->app_name[app_data->moh_offset], moh_class);/* Safe */
+ }
+
+ return post_it(bridge_channel, AST_BRIDGE_ACTION_RUN_APP, app_data, len_data);
+}
+
+int ast_bridge_channel_write_app(struct ast_bridge_channel *bridge_channel, const char *app_name, const char *app_args, const char *moh_class)
+{
+ return payload_helper_app(ast_bridge_channel_write_action_data,
+ bridge_channel, app_name, app_args, moh_class);
+}
+
+int ast_bridge_channel_queue_app(struct ast_bridge_channel *bridge_channel, const char *app_name, const char *app_args, const char *moh_class)
+{
+ return payload_helper_app(ast_bridge_channel_queue_action_data,
+ bridge_channel, app_name, app_args, moh_class);
+}
+
+void ast_bridge_channel_playfile(struct ast_bridge_channel *bridge_channel, ast_bridge_custom_play_fn custom_play, const char *playfile, const char *moh_class)
+{
+ if (moh_class) {
+ ast_bridge_channel_write_hold(bridge_channel, moh_class);
+ }
+ if (custom_play) {
+ custom_play(bridge_channel, playfile);
+ } else {
+ ast_stream_and_wait(bridge_channel->chan, playfile, AST_DIGIT_NONE);
+ }
+ if (moh_class) {
+ ast_bridge_channel_write_unhold(bridge_channel);
+ }
+
+ /*
+ * It may be necessary to resume music on hold after we finish
+ * playing the announcment.
+ *
+ * XXX We have no idea what MOH class was in use before playing
+ * the file. This method also fails to restore ringing indications.
+ * the proposed solution is to create a resume_entertainment callback
+ * for the bridge technology and execute it here.
+ */
+ if (ast_test_flag(ast_channel_flags(bridge_channel->chan), AST_FLAG_MOH)) {
+ ast_moh_start(bridge_channel->chan, NULL, NULL);
+ }
+}
+
+struct bridge_playfile {
+ /*! Call this function to play the playfile. (NULL if normal sound file to play) */
+ ast_bridge_custom_play_fn custom_play;
+ /*! Offset into playfile[] where the MOH class name starts. (zero if no MOH)*/
+ int moh_offset;
+ /*! Filename to play. */
+ char playfile[0];
+};
+
+/*!
+ * \internal
+ * \brief Handle the playfile bridge action.
+ * \since 12.0.0
+ *
+ * \param bridge_channel Which channel to play a file on.
+ * \param payload Action frame payload to play a file.
+ *
+ * \return Nothing
+ */
+static void bridge_channel_playfile(struct ast_bridge_channel *bridge_channel, struct bridge_playfile *payload)
+{
+ ast_bridge_channel_playfile(bridge_channel, payload->custom_play, payload->playfile,
+ payload->moh_offset ? &payload->playfile[payload->moh_offset] : NULL);
+}
+
+static int payload_helper_playfile(ast_bridge_channel_post_action_data post_it,
+ struct ast_bridge_channel *bridge_channel, ast_bridge_custom_play_fn custom_play, const char *playfile, const char *moh_class)
+{
+ struct bridge_playfile *payload;
+ size_t len_name = strlen(playfile) + 1;
+ size_t len_moh = !moh_class ? 0 : strlen(moh_class) + 1;
+ size_t len_payload = sizeof(*payload) + len_name + len_moh;
+
+ /* Fill in play file frame data. */
+ payload = alloca(len_payload);
+ payload->custom_play = custom_play;
+ payload->moh_offset = len_moh ? len_name : 0;
+ strcpy(payload->playfile, playfile);/* Safe */
+ if (moh_class) {
+ strcpy(&payload->playfile[payload->moh_offset], moh_class);/* Safe */
+ }
+
+ return post_it(bridge_channel, AST_BRIDGE_ACTION_PLAY_FILE, payload, len_payload);
+}
+
+int ast_bridge_channel_write_playfile(struct ast_bridge_channel *bridge_channel, ast_bridge_custom_play_fn custom_play, const char *playfile, const char *moh_class)
+{
+ return payload_helper_playfile(ast_bridge_channel_write_action_data,
+ bridge_channel, custom_play, playfile, moh_class);
+}
+
+int ast_bridge_channel_queue_playfile(struct ast_bridge_channel *bridge_channel, ast_bridge_custom_play_fn custom_play, const char *playfile, const char *moh_class)
+{
+ return payload_helper_playfile(ast_bridge_channel_queue_action_data,
+ bridge_channel, custom_play, playfile, moh_class);
+}
+
+struct bridge_custom_callback {
+ /*! Call this function on the bridge channel thread. */
+ ast_bridge_custom_callback_fn callback;
+ /*! Size of the payload if it exists. A number otherwise. */
+ size_t payload_size;
+ /*! Nonzero if the payload exists. */
+ char payload_exists;
+ /*! Payload to give to callback. */
+ char payload[0];
+};
+
+/*!
+ * \internal
+ * \brief Handle the do custom callback bridge action.
+ * \since 12.0.0
+ *
+ * \param bridge_channel Which channel to run the application on.
+ * \param data Action frame data to run the application.
+ *
+ * \return Nothing
+ */
+static void bridge_channel_do_callback(struct ast_bridge_channel *bridge_channel, struct bridge_custom_callback *data)
+{
+ data->callback(bridge_channel, data->payload_exists ? data->payload : NULL, data->payload_size);
+}
+
+static int payload_helper_cb(ast_bridge_channel_post_action_data post_it,
+ struct ast_bridge_channel *bridge_channel, ast_bridge_custom_callback_fn callback, const void *payload, size_t payload_size)
+{
+ struct bridge_custom_callback *cb_data;
+ size_t len_data = sizeof(*cb_data) + (payload ? payload_size : 0);
+
+ /* Sanity check. */
+ if (!callback) {
+ ast_assert(0);
+ return -1;
+ }
+
+ /* Fill in custom callback frame data. */
+ cb_data = alloca(len_data);
+ cb_data->callback = callback;
+ cb_data->payload_size = payload_size;
+ cb_data->payload_exists = payload && payload_size;
+ if (cb_data->payload_exists) {
+ memcpy(cb_data->payload, payload, payload_size);/* Safe */
+ }
+
+ return post_it(bridge_channel, AST_BRIDGE_ACTION_CALLBACK, cb_data, len_data);
+}
+
+int ast_bridge_channel_write_callback(struct ast_bridge_channel *bridge_channel, ast_bridge_custom_callback_fn callback, const void *payload, size_t payload_size)
+{
+ return payload_helper_cb(ast_bridge_channel_write_action_data,
+ bridge_channel, callback, payload, payload_size);
+}
+
+int ast_bridge_channel_queue_callback(struct ast_bridge_channel *bridge_channel, ast_bridge_custom_callback_fn callback, const void *payload, size_t payload_size)
+{
+ return payload_helper_cb(ast_bridge_channel_queue_action_data,
+ bridge_channel, callback, payload, payload_size);
+}
+
+struct bridge_park {
+ int parker_uuid_offset;
+ int app_data_offset;
+ /* buffer used for holding those strings */
+ char parkee_uuid[0];
+};
+
+static void bridge_channel_park(struct ast_bridge_channel *bridge_channel, struct bridge_park *payload)
+{
+ ast_bridge_channel_park(bridge_channel, payload->parkee_uuid,
+ &payload->parkee_uuid[payload->parker_uuid_offset],
+ payload->app_data_offset ? &payload->parkee_uuid[payload->app_data_offset] : NULL);
+}
+
+static int payload_helper_park(ast_bridge_channel_post_action_data post_it,
+ struct ast_bridge_channel *bridge_channel,
+ const char *parkee_uuid,
+ const char *parker_uuid,
+ const char *app_data)
+{
+ struct bridge_park *payload;
+ size_t len_parkee_uuid = strlen(parkee_uuid) + 1;
+ size_t len_parker_uuid = strlen(parker_uuid) + 1;
+ size_t len_app_data = !app_data ? 0 : strlen(app_data) + 1;
+ size_t len_payload = sizeof(*payload) + len_parker_uuid + len_parkee_uuid + len_app_data;
+
+ payload = alloca(len_payload);
+ payload->app_data_offset = len_app_data ? len_parkee_uuid + len_parker_uuid : 0;
+ payload->parker_uuid_offset = len_parkee_uuid;
+ strcpy(payload->parkee_uuid, parkee_uuid);
+ strcpy(&payload->parkee_uuid[payload->parker_uuid_offset], parker_uuid);
+ if (app_data) {
+ strcpy(&payload->parkee_uuid[payload->app_data_offset], app_data);
+ }
+
+ return post_it(bridge_channel, AST_BRIDGE_ACTION_PARK, payload, len_payload);
+}
+
+int ast_bridge_channel_write_park(struct ast_bridge_channel *bridge_channel, const char *parkee_uuid, const char *parker_uuid, const char *app_data)
+{
+ return payload_helper_park(ast_bridge_channel_write_action_data,
+ bridge_channel, parkee_uuid, parker_uuid, app_data);
+}
+
+static int bridge_channel_interval_ready(struct ast_bridge_channel *bridge_channel)
+{
+ struct ast_bridge_features *features = bridge_channel->features;
+ struct ast_bridge_hook *hook;
+ int ready;
+
+ ast_heap_wrlock(features->interval_hooks);
+ hook = ast_heap_peek(features->interval_hooks, 1);
+ ready = hook && ast_tvdiff_ms(hook->parms.timer.trip_time, ast_tvnow()) <= 0;
+ ast_heap_unlock(features->interval_hooks);
+
+ return ready;
+}
+
+int ast_bridge_notify_talking(struct ast_bridge_channel *bridge_channel, int started_talking)
+{
+ struct ast_frame action = {
+ .frametype = AST_FRAME_BRIDGE_ACTION,
+ .subclass.integer = started_talking
+ ? AST_BRIDGE_ACTION_TALKING_START : AST_BRIDGE_ACTION_TALKING_STOP,
+ };
+
+ return ast_bridge_channel_queue_frame(bridge_channel, &action);
+}
+
+struct ast_bridge_channel *ast_bridge_channel_peer(struct ast_bridge_channel *bridge_channel)
+{
+ struct ast_bridge *bridge = bridge_channel->bridge;
+ struct ast_bridge_channel *other = NULL;
+
+ if (bridge_channel->in_bridge && bridge->num_channels == 2) {
+ AST_LIST_TRAVERSE(&bridge->channels, other, entry) {
+ if (other != bridge_channel) {
+ break;
+ }
+ }
+ }
+
+ return other;
+}
+
+struct ast_bridge_channel *bridge_find_channel(struct ast_bridge *bridge, struct ast_channel *chan)
+{
+ struct ast_bridge_channel *bridge_channel;
+
+ AST_LIST_TRAVERSE(&bridge->channels, bridge_channel, entry) {
+ if (bridge_channel->chan == chan) {
+ break;
+ }
+ }
+
+ return bridge_channel;
+}
+
+/*!
+ * \internal
+ * \brief Suspend a channel from a bridge.
+ *
+ * \param bridge_channel Channel to suspend.
+ *
+ * \note This function assumes bridge_channel->bridge is locked.
+ *
+ * \return Nothing
+ */
+void bridge_channel_suspend_nolock(struct ast_bridge_channel *bridge_channel)
+{
+ bridge_channel->suspended = 1;
+ if (bridge_channel->in_bridge) {
+ --bridge_channel->bridge->num_active;
+ }
+
+ /* Get technology bridge threads off of the channel. */
+ if (bridge_channel->bridge->technology->suspend) {
+ bridge_channel->bridge->technology->suspend(bridge_channel->bridge, bridge_channel);
+ }
+}
+
+/*!
+ * \internal
+ * \brief Suspend a channel from a bridge.
+ *
+ * \param bridge_channel Channel to suspend.
+ *
+ * \return Nothing
+ */
+static void bridge_channel_suspend(struct ast_bridge_channel *bridge_channel)
+{
+ ast_bridge_channel_lock_bridge(bridge_channel);
+ bridge_channel_suspend_nolock(bridge_channel);
+ ast_bridge_unlock(bridge_channel->bridge);
+}
+
+/*!
+ * \internal
+ * \brief Unsuspend a channel from a bridge.
+ *
+ * \param bridge_channel Channel to unsuspend.
+ *
+ * \note This function assumes bridge_channel->bridge is locked.
+ *
+ * \return Nothing
+ */
+void bridge_channel_unsuspend_nolock(struct ast_bridge_channel *bridge_channel)
+{
+ bridge_channel->suspended = 0;
+ if (bridge_channel->in_bridge) {
+ ++bridge_channel->bridge->num_active;
+ }
+
+ /* Wake technology bridge threads to take care of channel again. */
+ if (bridge_channel->bridge->technology->unsuspend) {
+ bridge_channel->bridge->technology->unsuspend(bridge_channel->bridge, bridge_channel);
+ }
+
+ /* Wake suspended channel. */
+ ast_bridge_channel_lock(bridge_channel);
+ ast_cond_signal(&bridge_channel->cond);
+ ast_bridge_channel_unlock(bridge_channel);
+}
+
+/*!
+ * \internal
+ * \brief Unsuspend a channel from a bridge.
+ *
+ * \param bridge_channel Channel to unsuspend.
+ *
+ * \return Nothing
+ */
+static void bridge_channel_unsuspend(struct ast_bridge_channel *bridge_channel)
+{
+ ast_bridge_channel_lock_bridge(bridge_channel);
+ bridge_channel_unsuspend_nolock(bridge_channel);
+ ast_bridge_unlock(bridge_channel->bridge);
+}
+
+/*! \brief Internal function that activates interval hooks on a bridge channel */
+static void bridge_channel_interval(struct ast_bridge_channel *bridge_channel)
+{
+ struct ast_bridge_hook *hook;
+ struct timeval start;
+
+ ast_heap_wrlock(bridge_channel->features->interval_hooks);
+ start = ast_tvnow();
+ while ((hook = ast_heap_peek(bridge_channel->features->interval_hooks, 1))) {
+ int interval;
+ unsigned int execution_time;
+
+ if (ast_tvdiff_ms(hook->parms.timer.trip_time, start) > 0) {
+ ast_debug(1, "Hook %p on %p(%s) wants to happen in the future, stopping our traversal\n",
+ hook, bridge_channel, ast_channel_name(bridge_channel->chan));
+ break;
+ }
+ ao2_ref(hook, +1);
+ ast_heap_unlock(bridge_channel->features->interval_hooks);
+
+ ast_debug(1, "Executing hook %p on %p(%s)\n",
+ hook, bridge_channel, ast_channel_name(bridge_channel->chan));
+ interval = hook->callback(bridge_channel->bridge, bridge_channel, hook->hook_pvt);
+
+ ast_heap_wrlock(bridge_channel->features->interval_hooks);
+ if (ast_heap_peek(bridge_channel->features->interval_hooks,
+ hook->parms.timer.heap_index) != hook
+ || !ast_heap_remove(bridge_channel->features->interval_hooks, hook)) {
+ /* Interval hook is already removed from the bridge_channel. */
+ ao2_ref(hook, -1);
+ continue;
+ }
+ ao2_ref(hook, -1);
+
+ if (interval < 0) {
+ ast_debug(1, "Removed interval hook %p from %p(%s)\n",
+ hook, bridge_channel, ast_channel_name(bridge_channel->chan));
+ ao2_ref(hook, -1);
+ continue;
+ }
+ if (interval) {
+ /* Set new interval for the hook. */
+ hook->parms.timer.interval = interval;
+ }
+
+ ast_debug(1, "Updating interval hook %p with interval %u on %p(%s)\n",
+ hook, hook->parms.timer.interval, bridge_channel,
+ ast_channel_name(bridge_channel->chan));
+
+ /* resetting start */
+ start = ast_tvnow();
+
+ /*
+ * Resetup the interval hook for the next interval. We may need
+ * to skip over any missed intervals because the hook was
+ * delayed or took too long.
+ */
+ execution_time = ast_tvdiff_ms(start, hook->parms.timer.trip_time);
+ while (hook->parms.timer.interval < execution_time) {
+ execution_time -= hook->parms.timer.interval;
+ }
+ hook->parms.timer.trip_time = ast_tvadd(start, ast_samp2tv(hook->parms.timer.interval - execution_time, 1000));
+ hook->parms.timer.seqno = ast_atomic_fetchadd_int((int *) &bridge_channel->features->interval_sequence, +1);
+
+ if (ast_heap_push(bridge_channel->features->interval_hooks, hook)) {
+ /* Could not push the hook back onto the heap. */
+ ao2_ref(hook, -1);
+ }
+ }
+ ast_heap_unlock(bridge_channel->features->interval_hooks);
+}
+
+static int bridge_channel_write_dtmf_stream(struct ast_bridge_channel *bridge_channel, const char *dtmf)
+{
+ return ast_bridge_channel_write_action_data(bridge_channel,
+ AST_BRIDGE_ACTION_DTMF_STREAM, dtmf, strlen(dtmf) + 1);
+}
+
+/*!
+ * \brief Internal function that executes a feature on a bridge channel
+ * \note Neither the bridge nor the bridge_channel locks should be held when entering
+ * this function.
+ */
+static void bridge_channel_feature(struct ast_bridge_channel *bridge_channel)
+{
+ struct ast_bridge_features *features = bridge_channel->features;
+ struct ast_bridge_hook *hook = NULL;
+ char dtmf[MAXIMUM_DTMF_FEATURE_STRING] = "";
+ size_t dtmf_len = 0;
+ unsigned int digit_timeout;
+ RAII_VAR(struct ast_features_general_config *, gen_cfg, NULL, ao2_cleanup);
+
+ ast_channel_lock(bridge_channel->chan);
+ gen_cfg = ast_get_chan_features_general_config(bridge_channel->chan);
+ if (!gen_cfg) {
+ ast_log(LOG_ERROR, "Unable to retrieve features configuration.\n");
+ ast_channel_unlock(bridge_channel->chan);
+ return;
+ }
+ digit_timeout = gen_cfg->featuredigittimeout;
+ ast_channel_unlock(bridge_channel->chan);
+
+ /* The channel is now under our control and we don't really want any begin frames to do our DTMF matching so disable 'em at the core level */
+ ast_set_flag(ast_channel_flags(bridge_channel->chan), AST_FLAG_END_DTMF_ONLY);
+
+ /* Wait for DTMF on the channel and put it into a buffer. If the buffer matches any feature hook execute the hook. */
+ do {
+ int res;
+
+ /* If the above timed out simply exit */
+ res = ast_waitfordigit(bridge_channel->chan, digit_timeout);
+ if (!res) {
+ ast_debug(1, "DTMF feature string collection on %p(%s) timed out\n",
+ bridge_channel, ast_channel_name(bridge_channel->chan));
+ break;
+ }
+ if (res < 0) {
+ ast_debug(1, "DTMF feature string collection failed on %p(%s) for some reason\n",
+ bridge_channel, ast_channel_name(bridge_channel->chan));
+ break;
+ }
+
+/* BUGBUG need to record the duration of DTMF digits so when the string is played back, they are reproduced. */
+ /* Add the above DTMF into the DTMF string so we can do our matching */
+ dtmf[dtmf_len++] = res;
+ ast_debug(1, "DTMF feature string on %p(%s) is now '%s'\n",
+ bridge_channel, ast_channel_name(bridge_channel->chan), dtmf);
+
+ /* See if a DTMF feature hook matches or can match */
+ hook = ao2_find(features->dtmf_hooks, dtmf, OBJ_PARTIAL_KEY);
+ if (!hook) {
+ ast_debug(1, "No DTMF feature hooks on %p(%s) match '%s'\n",
+ bridge_channel, ast_channel_name(bridge_channel->chan), dtmf);
+ break;
+ }
+ if (strlen(hook->parms.dtmf.code) == dtmf_len) {
+ ast_debug(1, "DTMF feature hook %p matched DTMF string '%s' on %p(%s)\n",
+ hook, dtmf, bridge_channel, ast_channel_name(bridge_channel->chan));
+ break;
+ }
+ ao2_ref(hook, -1);
+ hook = NULL;
+
+ /* Stop if we have reached the maximum length of a DTMF feature string. */
+ } while (dtmf_len < ARRAY_LEN(dtmf) - 1);
+
+ /* Since we are done bringing DTMF in return to using both begin and end frames */
+ ast_clear_flag(ast_channel_flags(bridge_channel->chan), AST_FLAG_END_DTMF_ONLY);
+
+ /* If a hook was actually matched execute it on this channel, otherwise stream up the DTMF to the other channels */
+ if (hook) {
+ int remove_me;
+
+ remove_me = hook->callback(bridge_channel->bridge, bridge_channel, hook->hook_pvt);
+ if (remove_me) {
+ ast_debug(1, "DTMF hook %p is being removed from %p(%s)\n",
+ hook, bridge_channel, ast_channel_name(bridge_channel->chan));
+ ao2_unlink(features->dtmf_hooks, hook);
+ }
+ ao2_ref(hook, -1);
+
+ /*
+ * If we are handing the channel off to an external hook for
+ * ownership, we are not guaranteed what kind of state it will
+ * come back in. If the channel hungup, we need to detect that
+ * here if the hook did not already change the state.
+ */
+ if (bridge_channel->chan && ast_check_hangup_locked(bridge_channel->chan)) {
+ bridge_channel_handle_hangup(bridge_channel);
+ }
+ } else if (features->dtmf_passthrough) {
+ bridge_channel_write_dtmf_stream(bridge_channel, dtmf);
+ }
+}
+
+static void bridge_channel_talking(struct ast_bridge_channel *bridge_channel, int talking)
+{
+ struct ast_bridge_features *features = bridge_channel->features;
+
+ if (features->talker_cb) {
+ features->talker_cb(bridge_channel, features->talker_pvt_data, talking);
+ }
+}
+
+/*! \brief Internal function that plays back DTMF on a bridge channel */
+static void bridge_channel_dtmf_stream(struct ast_bridge_channel *bridge_channel, const char *dtmf)
+{
+ ast_debug(1, "Playing DTMF stream '%s' out to %p(%s)\n",
+ dtmf, bridge_channel, ast_channel_name(bridge_channel->chan));
+ ast_dtmf_stream(bridge_channel->chan, NULL, dtmf, 0, 0);
+}
+
+static void bridge_channel_blind_transfer(struct ast_bridge_channel *bridge_channel,
+ struct blind_transfer_data *blind_data)
+{
+ ast_async_goto(bridge_channel->chan, blind_data->context, blind_data->exten, 1);
+ bridge_channel_handle_hangup(bridge_channel);
+}
+
+static void after_bridge_move_channel(struct ast_channel *chan_bridged, void *data)
+{
+ RAII_VAR(struct ast_channel *, chan_target, data, ao2_cleanup);
+ struct ast_party_connected_line connected_target;
+ unsigned char connected_line_data[1024];
+ int payload_size;
+
+ ast_party_connected_line_init(&connected_target);
+
+ ast_channel_lock(chan_target);
+ ast_party_connected_line_copy(&connected_target, ast_channel_connected(chan_target));
+ ast_channel_unlock(chan_target);
+ ast_party_id_reset(&connected_target.priv);
+
+ if (ast_channel_move(chan_target, chan_bridged)) {
+ ast_softhangup(chan_target, AST_SOFTHANGUP_DEV);
+ ast_party_connected_line_free(&connected_target);
+ return;
+ }
+
+ if ((payload_size = ast_connected_line_build_data(connected_line_data,
+ sizeof(connected_line_data), &connected_target, NULL)) != -1) {
+ struct ast_control_read_action_payload *frame_payload;
+ int frame_size;
+
+ frame_size = payload_size + sizeof(*frame_payload);
+ frame_payload = ast_alloca(frame_size);
+ frame_payload->action = AST_FRAME_READ_ACTION_CONNECTED_LINE_MACRO;
+ frame_payload->payload_size = payload_size;
+ memcpy(frame_payload->payload, connected_line_data, payload_size);
+ ast_queue_control_data(chan_target, AST_CONTROL_READ_ACTION, frame_payload, frame_size);
+ }
+
+ ast_party_connected_line_free(&connected_target);
+}
+
+static void after_bridge_move_channel_fail(enum ast_after_bridge_cb_reason reason, void *data)
+{
+ RAII_VAR(struct ast_channel *, chan_target, data, ao2_cleanup);
+
+ ast_log(LOG_WARNING, "Unable to complete transfer: %s\n",
+ ast_after_bridge_cb_reason_string(reason));
+ ast_softhangup(chan_target, AST_SOFTHANGUP_DEV);
+}
+
+static void bridge_channel_attended_transfer(struct ast_bridge_channel *bridge_channel,
+ const char *target_chan_name)
+{
+ RAII_VAR(struct ast_channel *, chan_target, NULL, ao2_cleanup);
+ RAII_VAR(struct ast_channel *, chan_bridged, NULL, ao2_cleanup);
+
+ chan_target = ast_channel_get_by_name(target_chan_name);
+ if (!chan_target) {
+ /* Dang, it disappeared somehow */
+ bridge_channel_handle_hangup(bridge_channel);
+ return;
+ }
+
+ ast_bridge_channel_lock(bridge_channel);
+ chan_bridged = bridge_channel->chan;
+ ast_assert(chan_bridged != NULL);
+ ao2_ref(chan_bridged, +1);
+ ast_bridge_channel_unlock(bridge_channel);
+
+ if (ast_after_bridge_callback_set(chan_bridged, after_bridge_move_channel,
+ after_bridge_move_channel_fail, ast_channel_ref(chan_target))) {
+ ast_softhangup(chan_target, AST_SOFTHANGUP_DEV);
+
+ /* Release the ref we tried to pass to ast_after_bridge_callback_set(). */
+ ast_channel_unref(chan_target);
+ }
+ bridge_channel_handle_hangup(bridge_channel);
+}
+
+/*!
+ * \internal
+ * \brief Handle bridge channel bridge action frame.
+ * \since 12.0.0
+ *
+ * \param bridge_channel Channel to execute the action on.
+ * \param action What to do.
+ *
+ * \return Nothing
+ */
+static void bridge_channel_handle_action(struct ast_bridge_channel *bridge_channel, struct ast_frame *action)
+{
+ switch (action->subclass.integer) {
+ case AST_BRIDGE_ACTION_INTERVAL:
+ bridge_channel_suspend(bridge_channel);
+ ast_indicate(bridge_channel->chan, AST_CONTROL_SRCUPDATE);
+ bridge_channel_interval(bridge_channel);
+ ast_indicate(bridge_channel->chan, AST_CONTROL_SRCUPDATE);
+ bridge_channel_unsuspend(bridge_channel);
+ break;
+ case AST_BRIDGE_ACTION_FEATURE:
+ bridge_channel_suspend(bridge_channel);
+ ast_indicate(bridge_channel->chan, AST_CONTROL_SRCUPDATE);
+ bridge_channel_feature(bridge_channel);
+ ast_indicate(bridge_channel->chan, AST_CONTROL_SRCUPDATE);
+ bridge_channel_unsuspend(bridge_channel);
+ break;
+ case AST_BRIDGE_ACTION_DTMF_STREAM:
+ bridge_channel_suspend(bridge_channel);
+ ast_indicate(bridge_channel->chan, AST_CONTROL_SRCUPDATE);
+ bridge_channel_dtmf_stream(bridge_channel, action->data.ptr);
+ ast_indicate(bridge_channel->chan, AST_CONTROL_SRCUPDATE);
+ bridge_channel_unsuspend(bridge_channel);
+ break;
+ case AST_BRIDGE_ACTION_TALKING_START:
+ case AST_BRIDGE_ACTION_TALKING_STOP:
+ bridge_channel_talking(bridge_channel,
+ action->subclass.integer == AST_BRIDGE_ACTION_TALKING_START);
+ break;
+ case AST_BRIDGE_ACTION_PLAY_FILE:
+ bridge_channel_suspend(bridge_channel);
+ ast_indicate(bridge_channel->chan, AST_CONTROL_SRCUPDATE);
+ bridge_channel_playfile(bridge_channel, action->data.ptr);
+ ast_indicate(bridge_channel->chan, AST_CONTROL_SRCUPDATE);
+ bridge_channel_unsuspend(bridge_channel);
+ break;
+ case AST_BRIDGE_ACTION_RUN_APP:
+ bridge_channel_suspend(bridge_channel);
+ ast_indicate(bridge_channel->chan, AST_CONTROL_SRCUPDATE);
+ bridge_channel_run_app(bridge_channel, action->data.ptr);
+ ast_indicate(bridge_channel->chan, AST_CONTROL_SRCUPDATE);
+ bridge_channel_unsuspend(bridge_channel);
+ break;
+ case AST_BRIDGE_ACTION_CALLBACK:
+ bridge_channel_suspend(bridge_channel);
+ ast_indicate(bridge_channel->chan, AST_CONTROL_SRCUPDATE);
+ bridge_channel_do_callback(bridge_channel, action->data.ptr);
+ ast_indicate(bridge_channel->chan, AST_CONTROL_SRCUPDATE);
+ bridge_channel_unsuspend(bridge_channel);
+ break;
+ case AST_BRIDGE_ACTION_PARK:
+ bridge_channel_suspend(bridge_channel);
+ ast_indicate(bridge_channel->chan, AST_CONTROL_SRCUPDATE);
+ bridge_channel_park(bridge_channel, action->data.ptr);
+ ast_indicate(bridge_channel->chan, AST_CONTROL_SRCUPDATE);
+ bridge_channel_unsuspend(bridge_channel);
+ break;
+ case AST_BRIDGE_ACTION_BLIND_TRANSFER:
+ bridge_channel_blind_transfer(bridge_channel, action->data.ptr);
+ break;
+ case AST_BRIDGE_ACTION_ATTENDED_TRANSFER:
+ bridge_channel_attended_transfer(bridge_channel, action->data.ptr);
+ break;
+ default:
+ break;
+ }
+}
+
+/*!
+ * \internal
+ * \brief Check if a bridge should dissolve and do it.
+ * \since 12.0.0
+ *
+ * \param bridge_channel Channel causing the check.
+ *
+ * \note On entry, bridge_channel->bridge is already locked.
+ *
+ * \return Nothing
+ */
+static void bridge_dissolve_check(struct ast_bridge_channel *bridge_channel)
+{
+ struct ast_bridge *bridge = bridge_channel->bridge;
+
+ if (bridge->dissolved) {
+ return;
+ }
+
+ if (!bridge->num_channels
+ && ast_test_flag(&bridge->feature_flags, AST_BRIDGE_FLAG_DISSOLVE_EMPTY)) {
+ /* Last channel leaving the bridge turns off the lights. */
+ bridge_dissolve(bridge);
+ return;
+ }
+
+ switch (bridge_channel->state) {
+ case AST_BRIDGE_CHANNEL_STATE_END:
+ /* Do we need to dissolve the bridge because this channel hung up? */
+ if (ast_test_flag(&bridge->feature_flags, AST_BRIDGE_FLAG_DISSOLVE_HANGUP)
+ || (bridge_channel->features->usable
+ && ast_test_flag(&bridge_channel->features->feature_flags,
+ AST_BRIDGE_CHANNEL_FLAG_DISSOLVE_HANGUP))) {
+ bridge_dissolve(bridge);
+ return;
+ }
+ break;
+ default:
+ break;
+ }
+/* BUGBUG need to implement AST_BRIDGE_CHANNEL_FLAG_LONELY support here */
+}
+
+/*!
+ * \internal
+ * \brief Pull the bridge channel out of its current bridge.
+ * \since 12.0.0
+ *
+ * \param bridge_channel Channel to pull.
+ *
+ * \note On entry, bridge_channel->bridge is already locked.
+ *
+ * \return Nothing
+ */
+void bridge_channel_pull(struct ast_bridge_channel *bridge_channel)
+{
+ struct ast_bridge *bridge = bridge_channel->bridge;
+
+ if (!bridge_channel->in_bridge) {
+ return;
+ }
+ bridge_channel->in_bridge = 0;
+
+ ast_debug(1, "Bridge %s: pulling %p(%s)\n",
+ bridge->uniqueid, bridge_channel, ast_channel_name(bridge_channel->chan));
+
+ ast_verb(3, "Channel %s left '%s' %s-bridge <%s>\n",
+ ast_channel_name(bridge_channel->chan),
+ bridge->technology->name,
+ bridge->v_table->name,
+ bridge->uniqueid);
+
+/* BUGBUG This is where incoming HOLD/UNHOLD memory should write UNHOLD into bridge. (if not local optimizing) */
+/* BUGBUG This is where incoming DTMF begin/end memory should write DTMF end into bridge. (if not local optimizing) */
+ if (!bridge_channel->just_joined) {
+ /* Tell the bridge technology we are leaving so they tear us down */
+ ast_debug(1, "Bridge %s: %p(%s) is leaving %s technology\n",
+ bridge->uniqueid, bridge_channel, ast_channel_name(bridge_channel->chan),
+ bridge->technology->name);
+ if (bridge->technology->leave) {
+ bridge->technology->leave(bridge, bridge_channel);
+ }
+ }
+
+ /* Remove channel from the bridge */
+ if (!bridge_channel->suspended) {
+ --bridge->num_active;
+ }
+ --bridge->num_channels;
+ AST_LIST_REMOVE(&bridge->channels, bridge_channel, entry);
+ bridge->v_table->pull(bridge, bridge_channel);
+
+ ast_bridge_channel_clear_roles(bridge_channel);
+
+ /* If we are not going to be hung up after leaving a bridge, and we were an
+ * outgoing channel, clear the outgoing flag.
+ */
+ if (ast_test_flag(ast_channel_flags(bridge_channel->chan), AST_FLAG_OUTGOING)
+ && (ast_channel_softhangup_internal_flag(bridge_channel->chan) &
+ (AST_SOFTHANGUP_ASYNCGOTO | AST_SOFTHANGUP_UNBRIDGE))) {
+ ast_clear_flag(ast_channel_flags(bridge_channel->chan), AST_FLAG_OUTGOING);
+ }
+
+ bridge_dissolve_check(bridge_channel);
+
+ bridge->reconfigured = 1;
+ ast_bridge_publish_leave(bridge, bridge_channel->chan);
+}
+
+/*!
+ * \internal
+ * \brief Push the bridge channel into its specified bridge.
+ * \since 12.0.0
+ *
+ * \param bridge_channel Channel to push.
+ *
+ * \note On entry, bridge_channel->bridge is already locked.
+ *
+ * \retval 0 on success.
+ * \retval -1 on failure. The channel did not get pushed.
+ */
+int bridge_channel_push(struct ast_bridge_channel *bridge_channel)
+{
+ struct ast_bridge *bridge = bridge_channel->bridge;
+ struct ast_bridge_channel *swap;
+
+ ast_assert(!bridge_channel->in_bridge);
+
+ swap = bridge_find_channel(bridge, bridge_channel->swap);
+ bridge_channel->swap = NULL;
+
+ if (swap) {
+ ast_debug(1, "Bridge %s: pushing %p(%s) by swapping with %p(%s)\n",
+ bridge->uniqueid, bridge_channel, ast_channel_name(bridge_channel->chan),
+ swap, ast_channel_name(swap->chan));
+ } else {
+ ast_debug(1, "Bridge %s: pushing %p(%s)\n",
+ bridge->uniqueid, bridge_channel, ast_channel_name(bridge_channel->chan));
+ }
+
+ /* Add channel to the bridge */
+ if (bridge->dissolved
+ || bridge_channel->state != AST_BRIDGE_CHANNEL_STATE_WAIT
+ || (swap && swap->state != AST_BRIDGE_CHANNEL_STATE_WAIT)
+ || bridge->v_table->push(bridge, bridge_channel, swap)
+ || ast_bridge_channel_establish_roles(bridge_channel)) {
+ ast_debug(1, "Bridge %s: pushing %p(%s) into bridge failed\n",
+ bridge->uniqueid, bridge_channel, ast_channel_name(bridge_channel->chan));
+ ast_bridge_features_remove(bridge_channel->features, AST_BRIDGE_HOOK_REMOVE_ON_PULL);
+ return -1;
+ }
+ bridge_channel->in_bridge = 1;
+ bridge_channel->just_joined = 1;
+ AST_LIST_INSERT_TAIL(&bridge->channels, bridge_channel, entry);
+ ++bridge->num_channels;
+ if (!bridge_channel->suspended) {
+ ++bridge->num_active;
+ }
+
+ ast_verb(3, "Channel %s %s%s%s '%s' %s-bridge <%s>\n",
+ ast_channel_name(bridge_channel->chan),
+ swap ? "swapped with " : "joined",
+ swap ? ast_channel_name(swap->chan) : "",
+ swap ? " into" : "",
+ bridge->technology->name,
+ bridge->v_table->name,
+ bridge->uniqueid);
+
+ ast_bridge_publish_enter(bridge, bridge_channel->chan);
+ if (swap) {
+ ast_bridge_change_state(swap, AST_BRIDGE_CHANNEL_STATE_HANGUP);
+ bridge_channel_pull(swap);
+ }
+
+ /* Clear any BLINDTRANSFER and ATTENDEDTRANSFER since the transfer has completed. */
+ pbx_builtin_setvar_helper(bridge_channel->chan, "BLINDTRANSFER", NULL);
+ pbx_builtin_setvar_helper(bridge_channel->chan, "ATTENDEDTRANSFER", NULL);
+
+ bridge->reconfigured = 1;
+ return 0;
+}
+
+/*!
+ * \internal
+ * \brief Handle bridge channel control frame action.
+ * \since 12.0.0
+ *
+ * \param bridge_channel Channel to execute the control frame action on.
+ * \param fr Control frame to handle.
+ *
+ * \return Nothing
+ */
+static void bridge_channel_handle_control(struct ast_bridge_channel *bridge_channel, struct ast_frame *fr)
+{
+ struct ast_channel *chan;
+ struct ast_option_header *aoh;
+ int is_caller;
+ int intercept_failed;
+
+ chan = bridge_channel->chan;
+ switch (fr->subclass.integer) {
+ case AST_CONTROL_REDIRECTING:
+ is_caller = !ast_test_flag(ast_channel_flags(chan), AST_FLAG_OUTGOING);
+ bridge_channel_suspend(bridge_channel);
+ intercept_failed = ast_channel_redirecting_sub(NULL, chan, fr, 1)
+ && ast_channel_redirecting_macro(NULL, chan, fr, is_caller, 1);
+ bridge_channel_unsuspend(bridge_channel);
+ if (intercept_failed) {
+ ast_indicate_data(chan, fr->subclass.integer, fr->data.ptr, fr->datalen);
+ }
+ break;
+ case AST_CONTROL_CONNECTED_LINE:
+ is_caller = !ast_test_flag(ast_channel_flags(chan), AST_FLAG_OUTGOING);
+ bridge_channel_suspend(bridge_channel);
+ intercept_failed = ast_channel_connected_line_sub(NULL, chan, fr, 1)
+ && ast_channel_connected_line_macro(NULL, chan, fr, is_caller, 1);
+ bridge_channel_unsuspend(bridge_channel);
+ if (intercept_failed) {
+ ast_indicate_data(chan, fr->subclass.integer, fr->data.ptr, fr->datalen);
+ }
+ break;
+ case AST_CONTROL_HOLD:
+ case AST_CONTROL_UNHOLD:
+/*
+ * BUGBUG bridge_channels should remember sending/receiving an outstanding HOLD to/from the bridge
+ *
+ * When the sending channel is pulled from the bridge it needs to write into the bridge an UNHOLD before being pulled.
+ * When the receiving channel is pulled from the bridge it needs to generate its own UNHOLD.
+ * Something similar needs to be done for DTMF begin/end.
+ */
+ case AST_CONTROL_VIDUPDATE:
+ case AST_CONTROL_SRCUPDATE:
+ case AST_CONTROL_SRCCHANGE:
+ case AST_CONTROL_T38_PARAMETERS:
+/* BUGBUG may have to do something with a jitter buffer for these. */
+ ast_indicate_data(chan, fr->subclass.integer, fr->data.ptr, fr->datalen);
+ break;
+ case AST_CONTROL_OPTION:
+ /*
+ * Forward option Requests, but only ones we know are safe These
+ * are ONLY sent by chan_iax2 and I'm not convinced that they
+ * are useful. I haven't deleted them entirely because I just am
+ * not sure of the ramifications of removing them.
+ */
+ aoh = fr->data.ptr;
+ if (aoh && aoh->flag == AST_OPTION_FLAG_REQUEST) {
+ switch (ntohs(aoh->option)) {
+ case AST_OPTION_TONE_VERIFY:
+ case AST_OPTION_TDD:
+ case AST_OPTION_RELAXDTMF:
+ case AST_OPTION_AUDIO_MODE:
+ case AST_OPTION_DIGIT_DETECT:
+ case AST_OPTION_FAX_DETECT:
+ ast_channel_setoption(chan, ntohs(aoh->option), aoh->data,
+ fr->datalen - sizeof(*aoh), 0);
+ break;
+ default:
+ break;
+ }
+ }
+ break;
+ case AST_CONTROL_ANSWER:
+ if (ast_channel_state(chan) != AST_STATE_UP) {
+ ast_answer(chan);
+ } else {
+ ast_indicate(chan, -1);
+ }
+ break;
+ default:
+ ast_indicate_data(chan, fr->subclass.integer, fr->data.ptr, fr->datalen);
+ break;
+ }
+}
+
+/*!
+ * \internal
+ * \brief Handle bridge channel write frame to channel.
+ * \since 12.0.0
+ *
+ * \param bridge_channel Channel to write outgoing frame.
+ *
+ * \return Nothing
+ */
+static void bridge_channel_handle_write(struct ast_bridge_channel *bridge_channel)
+{
+ struct ast_frame *fr;
+ char nudge;
+
+ ast_bridge_channel_lock(bridge_channel);
+ if (read(bridge_channel->alert_pipe[0], &nudge, sizeof(nudge)) < 0) {
+ if (errno != EINTR && errno != EAGAIN) {
+ ast_log(LOG_WARNING, "read() failed for alert pipe on %p(%s): %s\n",
+ bridge_channel, ast_channel_name(bridge_channel->chan), strerror(errno));
+ }
+ }
+ fr = AST_LIST_REMOVE_HEAD(&bridge_channel->wr_queue, frame_list);
+ ast_bridge_channel_unlock(bridge_channel);
+ if (!fr) {
+ return;
+ }
+ switch (fr->frametype) {
+ case AST_FRAME_BRIDGE_ACTION:
+ bridge_channel_handle_action(bridge_channel, fr);
+ break;
+ case AST_FRAME_CONTROL:
+ bridge_channel_handle_control(bridge_channel, fr);
+ break;
+ case AST_FRAME_NULL:
+ break;
+ default:
+ /* Write the frame to the channel. */
+ bridge_channel->activity = AST_BRIDGE_CHANNEL_THREAD_SIMPLE;
+ ast_write(bridge_channel->chan, fr);
+ break;
+ }
+ ast_frfree(fr);
+}
+
+/*!
+ * \internal
+ * \brief Handle bridge channel interval expiration.
+ * \since 12.0.0
+ *
+ * \param bridge_channel Channel to check interval on.
+ *
+ * \return Nothing
+ */
+static void bridge_channel_handle_interval(struct ast_bridge_channel *bridge_channel)
+{
+ struct ast_timer *interval_timer;
+
+ interval_timer = bridge_channel->features->interval_timer;
+ if (interval_timer) {
+ if (ast_wait_for_input(ast_timer_fd(interval_timer), 0) == 1) {
+ ast_timer_ack(interval_timer, 1);
+ if (bridge_channel_interval_ready(bridge_channel)) {
+/* BUGBUG since this is now only run by the channel thread, there is no need to queue the action once this intervals become a first class wait item in bridge_channel_wait(). */
+ struct ast_frame interval_action = {
+ .frametype = AST_FRAME_BRIDGE_ACTION,
+ .subclass.integer = AST_BRIDGE_ACTION_INTERVAL,
+ };
+
+ ast_bridge_channel_queue_frame(bridge_channel, &interval_action);
+ }
+ }
+ }
+}
+
+/*! \brief Internal function to handle DTMF from a channel */
+static struct ast_frame *bridge_handle_dtmf(struct ast_bridge_channel *bridge_channel, struct ast_frame *frame)
+{
+ struct ast_bridge_features *features = bridge_channel->features;
+ struct ast_bridge_hook *hook;
+ char dtmf[2];
+
+/* BUGBUG the feature hook matching needs to be done here. Any matching feature hook needs to be queued onto the bridge_channel. Also the feature hook digit timeout needs to be handled. */
+/* BUGBUG the AMI atxfer action just sends DTMF end events to initiate DTMF atxfer and dial the extension. Another reason the DTMF hook matching needs rework. */
+ /* See if this DTMF matches the beginnings of any feature hooks, if so we switch to the feature state to either execute the feature or collect more DTMF */
+ dtmf[0] = frame->subclass.integer;
+ dtmf[1] = '\0';
+ hook = ao2_find(features->dtmf_hooks, dtmf, OBJ_PARTIAL_KEY);
+ if (hook) {
+ struct ast_frame action = {
+ .frametype = AST_FRAME_BRIDGE_ACTION,
+ .subclass.integer = AST_BRIDGE_ACTION_FEATURE,
+ };
+
+ ast_frfree(frame);
+ frame = NULL;
+ ast_bridge_channel_queue_frame(bridge_channel, &action);
+ ao2_ref(hook, -1);
+ }
+
+ return frame;
+}
+
+
+/*!
+ * \internal
+ * \brief Feed notification that a frame is waiting on a channel into the bridging core
+ *
+ * \param bridge_channel Bridge channel the notification was received on
+ */
+static void bridge_handle_trip(struct ast_bridge_channel *bridge_channel)
+{
+ struct ast_frame *frame;
+
+ if (bridge_channel->features->mute) {
+ frame = ast_read_noaudio(bridge_channel->chan);
+ } else {
+ frame = ast_read(bridge_channel->chan);
+ }
+
+ if (!frame) {
+ bridge_channel_handle_hangup(bridge_channel);
+ return;
+ }
+ switch (frame->frametype) {
+ case AST_FRAME_CONTROL:
+ switch (frame->subclass.integer) {
+ case AST_CONTROL_HANGUP:
+ bridge_channel_handle_hangup(bridge_channel);
+ ast_frfree(frame);
+ return;
+/* BUGBUG This is where incoming HOLD/UNHOLD memory should register. Write UNHOLD into bridge when this channel is pulled. */
+ default:
+ break;
+ }
+ break;
+ case AST_FRAME_DTMF_BEGIN:
+ frame = bridge_handle_dtmf(bridge_channel, frame);
+ if (!frame) {
+ return;
+ }
+ /* Fall through */
+ case AST_FRAME_DTMF_END:
+ if (!bridge_channel->features->dtmf_passthrough) {
+ ast_frfree(frame);
+ return;
+ }
+/* BUGBUG This is where incoming DTMF begin/end memory should register. Write DTMF end into bridge when this channel is pulled. */
+ break;
+ default:
+ break;
+ }
+
+ /* Simply write the frame out to the bridge technology. */
+/* BUGBUG The tech is where AST_CONTROL_ANSWER hook should go. (early bridge) */
+/* BUGBUG The tech is where incoming BUSY/CONGESTION hangup should happen? (early bridge) */
+ bridge_channel_write_frame(bridge_channel, frame);
+ ast_frfree(frame);
+}
+
+/*!
+ * \internal
+ * \brief Wait for something to happen on the bridge channel and handle it.
+ * \since 12.0.0
+ *
+ * \param bridge_channel Channel to wait.
+ *
+ * \note Each channel does writing/reading in their own thread.
+ *
+ * \return Nothing
+ */
+static void bridge_channel_wait(struct ast_bridge_channel *bridge_channel)
+{
+ int ms = -1;
+ int outfd;
+ struct ast_channel *chan;
+
+ /* Wait for data to either come from the channel or us to be signaled */
+ ast_bridge_channel_lock(bridge_channel);
+ if (bridge_channel->state != AST_BRIDGE_CHANNEL_STATE_WAIT) {
+ } else if (bridge_channel->suspended) {
+/* BUGBUG the external party use of suspended will go away as will these references because this is the bridge channel thread */
+ ast_debug(1, "Bridge %s: %p(%s) is going into a signal wait\n",
+ bridge_channel->bridge->uniqueid, bridge_channel,
+ ast_channel_name(bridge_channel->chan));
+ ast_cond_wait(&bridge_channel->cond, ao2_object_get_lockaddr(bridge_channel));
+ } else {
+ ast_debug(10, "Bridge %s: %p(%s) is going into a waitfor\n",
+ bridge_channel->bridge->uniqueid, bridge_channel,
+ ast_channel_name(bridge_channel->chan));
+ bridge_channel->waiting = 1;
+ ast_bridge_channel_unlock(bridge_channel);
+ outfd = -1;
+/* BUGBUG need to make the next expiring active interval setup ms timeout rather than holding up the chan reads. */
+ chan = ast_waitfor_nandfds(&bridge_channel->chan, 1,
+ &bridge_channel->alert_pipe[0], 1, NULL, &outfd, &ms);
+ bridge_channel->waiting = 0;
+ if (ast_channel_softhangup_internal_flag(bridge_channel->chan) & AST_SOFTHANGUP_UNBRIDGE) {
+ ast_channel_clear_softhangup(bridge_channel->chan, AST_SOFTHANGUP_UNBRIDGE);
+ ast_bridge_channel_lock_bridge(bridge_channel);
+ bridge_channel->bridge->reconfigured = 1;
+ bridge_reconfigured(bridge_channel->bridge, 0);
+ ast_bridge_unlock(bridge_channel->bridge);
+ }
+ ast_bridge_channel_lock(bridge_channel);
+ bridge_channel->activity = AST_BRIDGE_CHANNEL_THREAD_FRAME;
+ ast_bridge_channel_unlock(bridge_channel);
+ if (!bridge_channel->suspended
+ && bridge_channel->state == AST_BRIDGE_CHANNEL_STATE_WAIT) {
+ if (chan) {
+ bridge_channel_handle_interval(bridge_channel);
+ bridge_handle_trip(bridge_channel);
+ } else if (-1 < outfd) {
+ bridge_channel_handle_write(bridge_channel);
+ }
+ }
+ bridge_channel->activity = AST_BRIDGE_CHANNEL_THREAD_IDLE;
+ return;
+ }
+ ast_bridge_channel_unlock(bridge_channel);
+}
+
+/*!
+ * \internal
+ * \brief Handle bridge channel join event.
+ * \since 12.0.0
+ *
+ * \param bridge_channel Which channel is joining.
+ *
+ * \return Nothing
+ */
+static void bridge_channel_handle_join(struct ast_bridge_channel *bridge_channel)
+{
+ struct ast_bridge_features *features = bridge_channel->features;
+ struct ast_bridge_hook *hook;
+ struct ao2_iterator iter;
+
+ /* Run any join hooks. */
+ iter = ao2_iterator_init(features->join_hooks, AO2_ITERATOR_UNLINK);
+ hook = ao2_iterator_next(&iter);
+ if (hook) {
+ bridge_channel_suspend(bridge_channel);
+ ast_indicate(bridge_channel->chan, AST_CONTROL_SRCUPDATE);
+ do {
+ hook->callback(bridge_channel->bridge, bridge_channel, hook->hook_pvt);
+ ao2_ref(hook, -1);
+ } while ((hook = ao2_iterator_next(&iter)));
+ ast_indicate(bridge_channel->chan, AST_CONTROL_SRCUPDATE);
+ bridge_channel_unsuspend(bridge_channel);
+ }
+ ao2_iterator_destroy(&iter);
+}
+
+/*!
+ * \internal
+ * \brief Handle bridge channel leave event.
+ * \since 12.0.0
+ *
+ * \param bridge_channel Which channel is leaving.
+ *
+ * \return Nothing
+ */
+static void bridge_channel_handle_leave(struct ast_bridge_channel *bridge_channel)
+{
+ struct ast_bridge_features *features = bridge_channel->features;
+ struct ast_bridge_hook *hook;
+ struct ao2_iterator iter;
+
+ /* Run any leave hooks. */
+ iter = ao2_iterator_init(features->leave_hooks, AO2_ITERATOR_UNLINK);
+ hook = ao2_iterator_next(&iter);
+ if (hook) {
+ bridge_channel_suspend(bridge_channel);
+ ast_indicate(bridge_channel->chan, AST_CONTROL_SRCUPDATE);
+ do {
+ hook->callback(bridge_channel->bridge, bridge_channel, hook->hook_pvt);
+ ao2_ref(hook, -1);
+ } while ((hook = ao2_iterator_next(&iter)));
+ ast_indicate(bridge_channel->chan, AST_CONTROL_SRCUPDATE);
+ bridge_channel_unsuspend(bridge_channel);
+ }
+ ao2_iterator_destroy(&iter);
+}
+
+/*! \brief Join a channel to a bridge and handle anything the bridge may want us to do */
+void bridge_channel_join(struct ast_bridge_channel *bridge_channel)
+{
+ ast_format_copy(&bridge_channel->read_format, ast_channel_readformat(bridge_channel->chan));
+ ast_format_copy(&bridge_channel->write_format, ast_channel_writeformat(bridge_channel->chan));
+
+ ast_debug(1, "Bridge %s: %p(%s) is joining\n",
+ bridge_channel->bridge->uniqueid,
+ bridge_channel, ast_channel_name(bridge_channel->chan));
+
+ /*
+ * Get "in the bridge" before pushing the channel for any
+ * masquerades on the channel to happen before bridging.
+ */
+ ast_channel_lock(bridge_channel->chan);
+ ast_channel_internal_bridge_set(bridge_channel->chan, bridge_channel->bridge);
+ ast_channel_unlock(bridge_channel->chan);
+
+ /* Add the jitterbuffer if the channel requires it */
+ ast_jb_enable_for_channel(bridge_channel->chan);
+
+ /*
+ * Directly locking the bridge is safe here because nobody else
+ * knows about this bridge_channel yet.
+ */
+ ast_bridge_lock(bridge_channel->bridge);
+
+ if (!bridge_channel->bridge->callid) {
+ bridge_channel->bridge->callid = ast_read_threadstorage_callid();
+ }
+
+ if (bridge_channel_push(bridge_channel)) {
+ ast_bridge_change_state(bridge_channel, AST_BRIDGE_CHANNEL_STATE_HANGUP);
+ }
+ bridge_reconfigured(bridge_channel->bridge, 1);
+
+ if (bridge_channel->state == AST_BRIDGE_CHANNEL_STATE_WAIT) {
+ /*
+ * Indicate a source change since this channel is entering the
+ * bridge system only if the bridge technology is not MULTIMIX
+ * capable. The MULTIMIX technology has already done it.
+ */
+ if (!(bridge_channel->bridge->technology->capabilities
+ & AST_BRIDGE_CAPABILITY_MULTIMIX)) {
+ ast_indicate(bridge_channel->chan, AST_CONTROL_SRCCHANGE);
+ }
+
+ ast_bridge_unlock(bridge_channel->bridge);
+ bridge_channel_handle_join(bridge_channel);
+ while (bridge_channel->state == AST_BRIDGE_CHANNEL_STATE_WAIT) {
+ /* Wait for something to do. */
+ bridge_channel_wait(bridge_channel);
+ }
+ bridge_channel_handle_leave(bridge_channel);
+ ast_bridge_channel_lock_bridge(bridge_channel);
+ }
+
+ bridge_channel_pull(bridge_channel);
+ bridge_reconfigured(bridge_channel->bridge, 1);
+
+ ast_bridge_unlock(bridge_channel->bridge);
+
+ /* Indicate a source change since this channel is leaving the bridge system. */
+ ast_indicate(bridge_channel->chan, AST_CONTROL_SRCCHANGE);
+
+/* BUGBUG Revisit in regards to moving channels between bridges and local channel optimization. */
+/* BUGBUG This is where outgoing HOLD/UNHOLD memory should write UNHOLD to channel. */
+ /* Complete any partial DTMF digit before exiting the bridge. */
+ if (ast_channel_sending_dtmf_digit(bridge_channel->chan)) {
+ ast_channel_end_dtmf(bridge_channel->chan,
+ ast_channel_sending_dtmf_digit(bridge_channel->chan),
+ ast_channel_sending_dtmf_tv(bridge_channel->chan), "bridge end");
+ }
+
+ /*
+ * Wait for any dual redirect to complete.
+ *
+ * Must be done while "still in the bridge" for ast_async_goto()
+ * to work right.
+ */
+ while (ast_test_flag(ast_channel_flags(bridge_channel->chan), AST_FLAG_BRIDGE_DUAL_REDIRECT_WAIT)) {
+ sched_yield();
+ }
+ ast_channel_lock(bridge_channel->chan);
+ ast_channel_internal_bridge_set(bridge_channel->chan, NULL);
+ ast_channel_unlock(bridge_channel->chan);
+
+ ast_bridge_channel_restore_formats(bridge_channel);
+}
+
+void ast_bridge_channel_leave_bridge(struct ast_bridge_channel *bridge_channel)
+{
+ ast_bridge_change_state(bridge_channel, AST_BRIDGE_CHANNEL_STATE_END);
+}
+
+void ast_bridge_channel_leave_bridge_nolock(struct ast_bridge_channel *bridge_channel)
+{
+ ast_bridge_change_state_nolock(bridge_channel, AST_BRIDGE_CHANNEL_STATE_END);
+}
\ No newline at end of file
diff --git a/main/channel.c b/main/channel.c
index a1a3730baf..4738e37d47 100644
--- a/main/channel.c
+++ b/main/channel.c
@@ -6740,7 +6740,7 @@ void ast_do_masquerade(struct ast_channel *original)
* The clonechan was sending a DTMF digit that was not completed
* before the masquerade.
*/
- ast_bridge_end_dtmf(original, clone_sending_dtmf_digit, clone_sending_dtmf_tv,
+ ast_channel_end_dtmf(original, clone_sending_dtmf_digit, clone_sending_dtmf_tv,
"masquerade");
}
@@ -10406,3 +10406,24 @@ int ast_channel_unsuppress(struct ast_channel *chan, unsigned int direction, enu
return 0;
}
+
+void ast_channel_end_dtmf(struct ast_channel *chan, char digit, struct timeval start, const char *why)
+{
+ int dead;
+ long duration;
+
+ ast_channel_lock(chan);
+ dead = ast_test_flag(ast_channel_flags(chan), AST_FLAG_ZOMBIE)
+ || (ast_channel_softhangup_internal_flag(chan)
+ & ~(AST_SOFTHANGUP_ASYNCGOTO | AST_SOFTHANGUP_UNBRIDGE));
+ ast_channel_unlock(chan);
+ if (dead) {
+ /* Channel is a zombie or a real hangup. */
+ return;
+ }
+
+ duration = ast_tvdiff_ms(ast_tvnow(), start);
+ ast_senddigit_end(chan, digit, duration);
+ ast_log(LOG_DTMF, "DTMF end '%c' simulated on %s due to %s, duration %ld ms\n",
+ digit, ast_channel_name(chan), why, duration);
+}
\ No newline at end of file
diff --git a/main/features.c b/main/features.c
index 1150f7eb1c..1e578d2b9e 100644
--- a/main/features.c
+++ b/main/features.c
@@ -3161,27 +3161,6 @@ static void clear_dialed_interfaces(struct ast_channel *chan)
ast_channel_unlock(chan);
}
-void ast_bridge_end_dtmf(struct ast_channel *chan, char digit, struct timeval start, const char *why)
-{
- int dead;
- long duration;
-
- ast_channel_lock(chan);
- dead = ast_test_flag(ast_channel_flags(chan), AST_FLAG_ZOMBIE)
- || (ast_channel_softhangup_internal_flag(chan)
- & ~(AST_SOFTHANGUP_ASYNCGOTO | AST_SOFTHANGUP_UNBRIDGE));
- ast_channel_unlock(chan);
- if (dead) {
- /* Channel is a zombie or a real hangup. */
- return;
- }
-
- duration = ast_tvdiff_ms(ast_tvnow(), start);
- ast_senddigit_end(chan, digit, duration);
- ast_log(LOG_DTMF, "DTMF end '%c' simulated on %s due to %s, duration %ld ms\n",
- digit, ast_channel_name(chan), why, duration);
-}
-
/*!
* \internal
* \brief Setup bridge builtin features.
diff --git a/res/parking/parking_bridge.c b/res/parking/parking_bridge.c
index 75bd62bf9d..4c91998300 100644
--- a/res/parking/parking_bridge.c
+++ b/res/parking/parking_bridge.c
@@ -24,12 +24,13 @@
*/
#include "asterisk.h"
-#include "asterisk/logger.h"
#include "res_parking.h"
#include "asterisk/astobj2.h"
-#include "asterisk/features.h"
+#include "asterisk/logger.h"
#include "asterisk/say.h"
#include "asterisk/term.h"
+#include "asterisk/features.h"
+#include "asterisk/bridging_internal.h"
struct ast_bridge_parking
{
@@ -447,11 +448,11 @@ struct ast_bridge *bridge_parking_new(struct parking_lot *bridge_lot)
{
void *bridge;
- bridge = ast_bridge_alloc(sizeof(struct ast_bridge_parking), &ast_bridge_parking_v_table);
- bridge = ast_bridge_base_init(bridge, AST_BRIDGE_CAPABILITY_HOLDING,
+ bridge = bridge_alloc(sizeof(struct ast_bridge_parking), &ast_bridge_parking_v_table);
+ bridge = bridge_base_init(bridge, AST_BRIDGE_CAPABILITY_HOLDING,
AST_BRIDGE_FLAG_MERGE_INHIBIT_TO | AST_BRIDGE_FLAG_MERGE_INHIBIT_FROM
| AST_BRIDGE_FLAG_SWAP_INHIBIT_FROM);
bridge = ast_bridge_parking_init(bridge, bridge_lot);
- bridge = ast_bridge_register(bridge);
+ bridge = bridge_register(bridge);
return bridge;
}
diff --git a/res/parking/parking_bridge_features.c b/res/parking/parking_bridge_features.c
index aee4edbab2..e8ec1809bc 100644
--- a/res/parking/parking_bridge_features.c
+++ b/res/parking/parking_bridge_features.c
@@ -33,6 +33,9 @@ ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
#include "asterisk/logger.h"
#include "asterisk/pbx.h"
#include "asterisk/bridging.h"
+#include "asterisk/bridging_internal.h"
+#include "asterisk/bridging_channel_internal.h"
+#include "asterisk/bridging_channel.h"
#include "asterisk/bridging_features.h"
#include "asterisk/features.h"
#include "asterisk/say.h"
--
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