Asterisk
/
asterisk
mirror of https://github.com/asterisk/asterisk
1
0
Fork 0
Code Issues Releases Wiki Activity
You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
Branches Tags
${ item.name }
Create tag ${ searchTerm }
Create branch ${ searchTerm }
from '5996dd6a23'
${ noResults }
asterisk/apps/app_confbridge.c

856 lines
35 KiB
Raw Blame History

/*
* Asterisk -- An open source telephony toolkit.
*
* Copyright (C) 2007-2008, 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 Conference Bridge application
*
* \author\verbatim Joshua Colp <jcolp@digium.com> \endverbatim
*
* This is a conference bridge application utilizing the bridging core.
* \ingroup applications
*/
/*** MODULEINFO
<support_level>extended</support_level>
***/
#include "asterisk.h"
ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <signal.h>
#include "asterisk/file.h"
#include "asterisk/logger.h"
#include "asterisk/channel.h"
#include "asterisk/pbx.h"
#include "asterisk/module.h"
#include "asterisk/lock.h"
#include "asterisk/app.h"
#include "asterisk/bridging.h"
#include "asterisk/musiconhold.h"
#include "asterisk/say.h"
#include "asterisk/audiohook.h"
#include "asterisk/astobj2.h"
/*** DOCUMENTATION
<application name="ConfBridge" language="en_US">
<synopsis>
Conference bridge application.
</synopsis>
<syntax>
<parameter name="confno">
<para>The conference number</para>
</parameter>
<parameter name="options">
<optionlist>
<option name="a">
<para>Set admin mode.</para>
</option>
<option name="A">
<para>Set marked mode.</para>
</option>
<option name="c">
<para>Announce user(s) count on joining a conference.</para>
</option>
<option name="m">
<para>Set initially muted.</para>
</option>
<option name="M" hasparams="optional">
<para>Enable music on hold when the conference has a single caller. Optionally,
specify a musiconhold class to use. If one is not provided, it will use the
channel's currently set music class, or <literal>default</literal>.</para>
<argument name="class" required="true" />
</option>
<option name="1">
<para>Do not play message when first person enters</para>
</option>
<option name="s">
<para>Present menu (user or admin) when <literal>#</literal> is received
(send to menu).</para>
</option>
<option name="w">
<para>Wait until the marked user enters the conference.</para>
</option>
<option name="q">
<para>Quiet mode (don't play enter/leave sounds).</para>
</option>
</optionlist>
</parameter>
</syntax>
<description>
<para>Enters the user into a specified conference bridge. The user can exit the conference by hangup only.</para>
<para>The join sound can be set using the <literal>CONFBRIDGE_JOIN_SOUND</literal> variable and the leave sound can be set using the <literal>CONFBRIDGE_LEAVE_SOUND</literal> variable. These can be unique to the caller.</para>
<note><para>This application will not automatically answer the channel.</para></note>
</description>
</application>
***/
/*!
* \par Playing back a file to a channel in a conference
* You might notice in this application that while playing a sound file
* to a channel the actual conference bridge lock is not held. This is done so
* that other channels are not blocked from interacting with the conference bridge.
* Unfortunately because of this it is possible for things to change after the sound file
* is done being played. Data must therefore be checked after reacquiring the conference
* bridge lock if it is important.
*/
static const char app[] = "ConfBridge";
enum {
OPTION_ADMIN = (1 << 0), /*!< Set if the caller is an administrator */
OPTION_MENU = (1 << 1), /*!< Set if the caller should have access to the conference bridge IVR menu */
OPTION_MUSICONHOLD = (1 << 2), /*!< Set if music on hold should be played if nobody else is in the conference bridge */
OPTION_NOONLYPERSON = (1 << 3), /*!< Set if the "you are currently the only person in this conference" sound file should not be played */
OPTION_STARTMUTED = (1 << 4), /*!< Set if the caller should be initially set muted */
OPTION_ANNOUNCEUSERCOUNT = (1 << 5), /*!< Set if the number of users should be announced to the caller */
OPTION_MARKEDUSER = (1 << 6), /*!< Set if the caller is a marked user */
OPTION_WAITMARKED = (1 << 7), /*!< Set if the conference must wait for a marked user before starting */
OPTION_QUIET = (1 << 8), /*!< Set if no audio prompts should be played */
};
enum {
OPTION_MUSICONHOLD_CLASS, /*!< If the 'M' option is set, the music on hold class to play */
/*This must be the last element */
OPTION_ARRAY_SIZE,
};
AST_APP_OPTIONS(app_opts,{
AST_APP_OPTION('A', OPTION_MARKEDUSER),
AST_APP_OPTION('a', OPTION_ADMIN),
AST_APP_OPTION('c', OPTION_ANNOUNCEUSERCOUNT),
AST_APP_OPTION('m', OPTION_STARTMUTED),
AST_APP_OPTION_ARG('M', OPTION_MUSICONHOLD, OPTION_MUSICONHOLD_CLASS),
AST_APP_OPTION('1', OPTION_NOONLYPERSON),
AST_APP_OPTION('s', OPTION_MENU),
AST_APP_OPTION('w', OPTION_WAITMARKED),
AST_APP_OPTION('q', OPTION_QUIET),
});
/* Maximum length of a conference bridge name */
#define MAX_CONF_NAME 32
/* Number of buckets our conference bridges container can have */
#define CONFERENCE_BRIDGE_BUCKETS 53
/*! \brief The structure that represents a conference bridge */
struct conference_bridge {
char name[MAX_CONF_NAME]; /*!< Name of the conference bridge */
struct ast_bridge *bridge; /*!< Bridge structure doing the mixing */
unsigned int users; /*!< Number of users present */
unsigned int markedusers; /*!< Number of marked users present */
unsigned int locked:1; /*!< Is this conference bridge locked? */
AST_LIST_HEAD_NOLOCK(, conference_bridge_user) users_list; /*!< List of users participating in the conference bridge */
struct ast_channel *playback_chan; /*!< Channel used for playback into the conference bridge */
ast_mutex_t playback_lock; /*!< Lock used for playback channel */
};
/*! \brief The structure that represents a conference bridge user */
struct conference_bridge_user {
struct conference_bridge *conference_bridge; /*!< Conference bridge they are participating in */
struct ast_channel *chan; /*!< Asterisk channel participating */
struct ast_flags flags; /*!< Flags passed in when the application was called */
char *opt_args[OPTION_ARRAY_SIZE]; /*!< Arguments to options passed when application was called */
struct ast_bridge_features features; /*!< Bridge features structure */
unsigned int kicked:1; /*!< User has been kicked from the conference */
AST_LIST_ENTRY(conference_bridge_user) list; /*!< Linked list information */
};
/*! \brief Container to hold all conference bridges in progress */
static struct ao2_container *conference_bridges;
static int play_sound_file(struct conference_bridge *conference_bridge, const char *filename);
/*! \brief Hashing function used for conference bridges container */
static int conference_bridge_hash_cb(const void *obj, const int flags)
{
const struct conference_bridge *conference_bridge = obj;
return ast_str_case_hash(conference_bridge->name);
}
/*! \brief Comparison function used for conference bridges container */
static int conference_bridge_cmp_cb(void *obj, void *arg, int flags)
{
const struct conference_bridge *conference_bridge0 = obj, *conference_bridge1 = arg;
return (!strcasecmp(conference_bridge0->name, conference_bridge1->name) ? CMP_MATCH | CMP_STOP : 0);
}
/*!
* \brief Announce number of users in the conference bridge to the caller
*
* \param conference_bridge Conference bridge to peek at
* \param conference_bridge_user Caller
*
* \return Returns 0 on success, -1 if the user hung up
*/
static int announce_user_count(struct conference_bridge *conference_bridge, struct conference_bridge_user *conference_bridge_user)
{
if (conference_bridge->users == 1) {
/* Awww we are the only person in the conference bridge */
return 0;
} else if (conference_bridge->users == 2) {
/* Eep, there is one other person */
if (ast_stream_and_wait(conference_bridge_user->chan, "conf-onlyone", "")) {
return -1;
}
} else {
/* Alas multiple others in here */
if (ast_stream_and_wait(conference_bridge_user->chan, "conf-thereare", "")) {
return -1;
}
if (ast_say_number(conference_bridge_user->chan, conference_bridge->users - 1, "", conference_bridge_user->chan->language, NULL)) {
return -1;
}
if (ast_stream_and_wait(conference_bridge_user->chan, "conf-otherinparty", "")) {
return -1;
}
}
return 0;
}
/*!
* \brief Play back an audio file to a channel
*
* \param conference_bridge Conference bridge they are in
* \param chan Channel to play audio prompt to
* \param file Prompt to play
*
* \return Returns 0 on success, -1 if the user hung up
*
* \note This function assumes that conference_bridge is locked
*/
static int play_prompt_to_channel(struct conference_bridge *conference_bridge, struct ast_channel *chan, const char *file)
{
int res;
ao2_unlock(conference_bridge);
res = ast_stream_and_wait(chan, file, "");
ao2_lock(conference_bridge);
return res;
}
/*!
* \brief Perform post-joining marked specific actions
*
* \param conference_bridge Conference bridge being joined
* \param conference_bridge_user Conference bridge user joining
*
* \return Returns 0 on success, -1 if the user hung up
*/
static int post_join_marked(struct conference_bridge *conference_bridge, struct conference_bridge_user *conference_bridge_user)
{
if (ast_test_flag(&conference_bridge_user->flags, OPTION_MARKEDUSER)) {
struct conference_bridge_user *other_conference_bridge_user = NULL;
/* If we are not the first marked user to join just bail out now */
if (conference_bridge->markedusers >= 2) {
return 0;
}
/* Iterate through every participant stopping MOH on them if need be */
AST_LIST_TRAVERSE(&conference_bridge->users_list, other_conference_bridge_user, list) {
if (other_conference_bridge_user == conference_bridge_user) {
continue;
}
if (ast_test_flag(&other_conference_bridge_user->flags, OPTION_MUSICONHOLD) && !ast_bridge_suspend(conference_bridge->bridge, other_conference_bridge_user->chan)) {
ast_moh_stop(other_conference_bridge_user->chan);
ast_bridge_unsuspend(conference_bridge->bridge, other_conference_bridge_user->chan);
}
}
/* Next play the audio file stating they are going to be placed into the conference */
if (!ast_test_flag(&conference_bridge_user->flags, OPTION_QUIET)) {
if (play_prompt_to_channel(conference_bridge,
conference_bridge_user->chan,
"conf-placeintoconf")) {
/* user hungup while the sound was playing */
return -1;
}
}
/* Finally iterate through and unmute them all */
AST_LIST_TRAVERSE(&conference_bridge->users_list, other_conference_bridge_user, list) {
if (other_conference_bridge_user == conference_bridge_user) {
continue;
}
other_conference_bridge_user->features.mute = 0;
}
} else {
/* If a marked user already exists in the conference bridge we can just bail out now */
if (conference_bridge->markedusers) {
return 0;
}
/* Be sure we are muted so we can't talk to anybody else waiting */
conference_bridge_user->features.mute = 1;
/* If we have not been quieted play back that they are waiting for the leader */
if (!ast_test_flag(&conference_bridge_user->flags, OPTION_QUIET)) {
if (play_prompt_to_channel(conference_bridge, conference_bridge_user->chan, "conf-waitforleader")) {
/* user hung up while the sound was playing */
return -1;
}
}
/* Start music on hold if needed */
/* We need to recheck the markedusers value here. play_prompt_to_channel unlocks the conference bridge, potentially
* allowing a marked user to enter while the prompt was playing
*/
if (!conference_bridge->markedusers && ast_test_flag(&conference_bridge_user->flags, OPTION_MUSICONHOLD)) {
ast_moh_start(conference_bridge_user->chan, conference_bridge_user->opt_args[OPTION_MUSICONHOLD_CLASS], NULL);
}
}
return 0;
}
/*!
* \brief Perform post-joining non-marked specific actions
*
* \param conference_bridge Conference bridge being joined
* \param conference_bridge_user Conference bridge user joining
*
* \return Returns 0 on success, -1 if the user hung up
*/
static int post_join_unmarked(struct conference_bridge *conference_bridge, struct conference_bridge_user *conference_bridge_user)
{
/* Play back audio prompt and start MOH if need be if we are the first participant */
if (conference_bridge->users == 1) {
/* If audio prompts have not been quieted or this prompt quieted play it on out */
if (!ast_test_flag(&conference_bridge_user->flags, OPTION_QUIET | OPTION_NOONLYPERSON)) {
if (play_prompt_to_channel(conference_bridge, conference_bridge_user->chan, "conf-onlyperson")) {
/* user hung up while the sound was playing */
return -1;
}
}
/* If we need to start music on hold on the channel do so now */
/* We need to re-check the number of users in the conference bridge here because another conference bridge
* participant could have joined while the above prompt was playing for the first user.
*/
if (conference_bridge->users == 1 && ast_test_flag(&conference_bridge_user->flags, OPTION_MUSICONHOLD)) {
ast_moh_start(conference_bridge_user->chan, conference_bridge_user->opt_args[OPTION_MUSICONHOLD_CLASS], NULL);
}
return 0;
}
/* Announce number of users if need be */
if (ast_test_flag(&conference_bridge_user->flags, OPTION_ANNOUNCEUSERCOUNT)) {
ao2_unlock(conference_bridge);
if (announce_user_count(conference_bridge, conference_bridge_user)) {
ao2_lock(conference_bridge);
return -1;
}
ao2_lock(conference_bridge);
}
/* If we are the second participant we may need to stop music on hold on the first */
if (conference_bridge->users == 2) {
struct conference_bridge_user *first_participant = AST_LIST_FIRST(&conference_bridge->users_list);
/* Temporarily suspend the above participant from the bridge so we have control to stop MOH if needed */
if (ast_test_flag(&first_participant->flags, OPTION_MUSICONHOLD) && !ast_bridge_suspend(conference_bridge->bridge, first_participant->chan)) {
ast_moh_stop(first_participant->chan);
ast_bridge_unsuspend(conference_bridge->bridge, first_participant->chan);
}
}
return 0;
}
/*!
* \brief Destroy a conference bridge
*
* \param obj The conference bridge object
*
* \return Returns nothing
*/
static void destroy_conference_bridge(void *obj)
{
struct conference_bridge *conference_bridge = obj;
ast_debug(1, "Destroying conference bridge '%s'\n", conference_bridge->name);
ast_mutex_destroy(&conference_bridge->playback_lock);
if (conference_bridge->playback_chan) {
struct ast_channel *underlying_channel = conference_bridge->playback_chan->tech->bridged_channel(conference_bridge->playback_chan, NULL);
ast_hangup(underlying_channel);
ast_hangup(conference_bridge->playback_chan);
conference_bridge->playback_chan = NULL;
}
/* Destroying a conference bridge is simple, all we have to do is destroy the bridging object */
if (conference_bridge->bridge) {
ast_bridge_destroy(conference_bridge->bridge);
conference_bridge->bridge = NULL;
}
}
static void leave_conference_bridge(struct conference_bridge *conference_bridge, struct conference_bridge_user *conference_bridge_user);
/*!
* \brief Join a conference bridge
*
* \param name The conference name
* \param conference_bridge_user Conference bridge user structure
*
* \return A pointer to the conference bridge struct, or NULL if the conference room wasn't found.
*/
static struct conference_bridge *join_conference_bridge(const char *name, struct conference_bridge_user *conference_bridge_user)
{
struct conference_bridge *conference_bridge = NULL;
struct conference_bridge tmp;
ast_copy_string(tmp.name, name, sizeof(tmp.name));
/* We explictly lock the conference bridges container ourselves so that other callers can not create duplicate conferences at the same */
ao2_lock(conference_bridges);
ast_debug(1, "Trying to find conference bridge '%s'\n", name);
/* Attempt to find an existing conference bridge */
conference_bridge = ao2_find(conference_bridges, &tmp, OBJ_POINTER);
/* When finding a conference bridge that already exists make sure that it is not locked, and if so that we are not an admin */
if (conference_bridge && conference_bridge->locked && !ast_test_flag(&conference_bridge_user->flags, OPTION_ADMIN)) {
ao2_unlock(conference_bridges);
ao2_ref(conference_bridge, -1);
ast_debug(1, "Conference bridge '%s' is locked and caller is not an admin\n", name);
ast_stream_and_wait(conference_bridge_user->chan, "conf-locked", "");
return NULL;
}
/* If no conference bridge was found see if we can create one */
if (!conference_bridge) {
/* Try to allocate memory for a new conference bridge, if we fail... this won't end well. */
if (!(conference_bridge = ao2_alloc(sizeof(*conference_bridge), destroy_conference_bridge))) {
ao2_unlock(conference_bridges);
ast_log(LOG_ERROR, "Conference bridge '%s' does not exist.\n", name);
return NULL;
}
/* Setup conference bridge parameters */
ast_copy_string(conference_bridge->name, name, sizeof(conference_bridge->name));
/* Create an actual bridge that will do the audio mixing */
if (!(conference_bridge->bridge = ast_bridge_new(AST_BRIDGE_CAPABILITY_1TO1MIX, AST_BRIDGE_FLAG_SMART))) {
ao2_ref(conference_bridge, -1);
conference_bridge = NULL;
ao2_unlock(conference_bridges);
ast_log(LOG_ERROR, "Conference bridge '%s' could not be created.\n", name);
return NULL;
}
/* Setup lock for playback channel */
ast_mutex_init(&conference_bridge->playback_lock);
/* Link it into the conference bridges container */
ao2_link(conference_bridges, conference_bridge);
ast_debug(1, "Created conference bridge '%s' and linked to container '%p'\n", name, conference_bridges);
}
ao2_unlock(conference_bridges);
/* Setup conference bridge user parameters */
conference_bridge_user->conference_bridge = conference_bridge;
ao2_lock(conference_bridge);
/* All good to go, add them in */
AST_LIST_INSERT_TAIL(&conference_bridge->users_list, conference_bridge_user, list);
/* Increment the users count on the bridge, but record it as it is going to need to be known right after this */
conference_bridge->users++;
/* If the caller is a marked user bump up the count */
if (ast_test_flag(&conference_bridge_user->flags, OPTION_MARKEDUSER)) {
conference_bridge->markedusers++;
}
/* Set the device state for this conference */
if (conference_bridge->users == 1) {
ast_devstate_changed(AST_DEVICE_INUSE, AST_DEVSTATE_CACHABLE, "confbridge:%s", conference_bridge->name);
}
/* If the caller is a marked user or is waiting for a marked user to enter pass 'em off, otherwise pass them off to do regular joining stuff */
if (ast_test_flag(&conference_bridge_user->flags, OPTION_MARKEDUSER | OPTION_WAITMARKED)) {
if (post_join_marked(conference_bridge, conference_bridge_user)) {
ao2_unlock(conference_bridge);
leave_conference_bridge(conference_bridge, conference_bridge_user);
return NULL;
}
} else {
if (post_join_unmarked(conference_bridge, conference_bridge_user)) {
ao2_unlock(conference_bridge);
leave_conference_bridge(conference_bridge, conference_bridge_user);
return NULL;
}
}
ao2_unlock(conference_bridge);
return conference_bridge;
}
/*!
* \brief Leave a conference bridge
*
* \param conference_bridge The conference bridge to leave
* \param conference_bridge_user The conference bridge user structure
*
*/
static void leave_conference_bridge(struct conference_bridge *conference_bridge, struct conference_bridge_user *conference_bridge_user)
{
ao2_lock(conference_bridge);
/* If this caller is a marked user bump down the count */
if (ast_test_flag(&conference_bridge_user->flags, OPTION_MARKEDUSER)) {
conference_bridge->markedusers--;
}
/* Decrement the users count while keeping the previous participant count */
conference_bridge->users--;
/* Drop conference bridge user from the list, they be going bye bye */
AST_LIST_REMOVE(&conference_bridge->users_list, conference_bridge_user, list);
/* If there are still users in the conference bridge we may need to do things (such as start MOH on them) */
if (conference_bridge->users) {
if (ast_test_flag(&conference_bridge_user->flags, OPTION_MARKEDUSER) && !conference_bridge->markedusers) {
struct conference_bridge_user *other_participant = NULL;
/* Start out with muting everyone */
AST_LIST_TRAVERSE(&conference_bridge->users_list, other_participant, list) {
other_participant->features.mute = 1;
}
/* Play back the audio prompt saying the leader has left the conference */
if (!ast_test_flag(&conference_bridge_user->flags, OPTION_QUIET)) {
ao2_unlock(conference_bridge);
ast_autoservice_start(conference_bridge_user->chan);
play_sound_file(conference_bridge, "conf-leaderhasleft");
ast_autoservice_stop(conference_bridge_user->chan);
ao2_lock(conference_bridge);
}
/* Now on to starting MOH if needed */
AST_LIST_TRAVERSE(&conference_bridge->users_list, other_participant, list) {
if (ast_test_flag(&other_participant->flags, OPTION_MUSICONHOLD) && !ast_bridge_suspend(conference_bridge->bridge, other_participant->chan)) {
ast_moh_start(other_participant->chan, other_participant->opt_args[OPTION_MUSICONHOLD_CLASS], NULL);
ast_bridge_unsuspend(conference_bridge->bridge, other_participant->chan);
}
}
} else if (conference_bridge->users == 1) {
/* Of course if there is one other person in here we may need to start up MOH on them */
struct conference_bridge_user *first_participant = AST_LIST_FIRST(&conference_bridge->users_list);
if (ast_test_flag(&first_participant->flags, OPTION_MUSICONHOLD) && !ast_bridge_suspend(conference_bridge->bridge, first_participant->chan)) {
ast_moh_start(first_participant->chan, first_participant->opt_args[OPTION_MUSICONHOLD_CLASS], NULL);
ast_bridge_unsuspend(conference_bridge->bridge, first_participant->chan);
}
}
} else {
/* Set device state to "not in use" */
ast_devstate_changed(AST_DEVICE_NOT_INUSE, AST_DEVSTATE_CACHABLE, "confbridge:%s", conference_bridge->name);
ao2_unlink(conference_bridges, conference_bridge);
}
/* Done mucking with the conference bridge, huzzah */
ao2_unlock(conference_bridge);
ao2_ref(conference_bridge, -1);
}
/*!
* \brief Play sound file into conference bridge
*
* \param conference_bridge The conference bridge to play sound file into
* \param filename Sound file to play
*
* \retval 0 success
* \retval -1 failure
*/
static int play_sound_file(struct conference_bridge *conference_bridge, const char *filename)
{
struct ast_channel *underlying_channel;
ast_mutex_lock(&conference_bridge->playback_lock);
if (!(conference_bridge->playback_chan)) {
int cause;
if (!(conference_bridge->playback_chan = ast_request("Bridge", AST_FORMAT_SLINEAR, NULL, "", &cause))) {
ast_mutex_unlock(&conference_bridge->playback_lock);
return -1;
}
conference_bridge->playback_chan->bridge = conference_bridge->bridge;
if (ast_call(conference_bridge->playback_chan, "", 0)) {
ast_hangup(conference_bridge->playback_chan);
conference_bridge->playback_chan = NULL;
ast_mutex_unlock(&conference_bridge->playback_lock);
return -1;
}
ast_debug(1, "Created a playback channel to conference bridge '%s'\n", conference_bridge->name);
underlying_channel = conference_bridge->playback_chan->tech->bridged_channel(conference_bridge->playback_chan, NULL);
} else {
/* Channel was already available so we just need to add it back into the bridge */
underlying_channel = conference_bridge->playback_chan->tech->bridged_channel(conference_bridge->playback_chan, NULL);
ast_bridge_impart(conference_bridge->bridge, underlying_channel, NULL, NULL);
}
/* The channel is all under our control, in goes the prompt */
ast_stream_and_wait(conference_bridge->playback_chan, filename, "");
ast_debug(1, "Departing underlying channel '%s' from bridge '%p'\n", underlying_channel->name, conference_bridge->bridge);
ast_bridge_depart(conference_bridge->bridge, underlying_channel);
ast_mutex_unlock(&conference_bridge->playback_lock);
return 0;
}
/*!
* \brief DTMF Menu Callback
*
* \param bridge Bridge this is involving
* \param bridge_channel Bridged channel this is involving
* \param hook_pvt User's conference bridge structure
*
* \retval 0 success
* \retval -1 failure
*/
static int menu_callback(struct ast_bridge *bridge, struct ast_bridge_channel *bridge_channel, void *hook_pvt)
{
struct conference_bridge_user *conference_bridge_user = hook_pvt;
struct conference_bridge *conference_bridge = conference_bridge_user->conference_bridge;
int digit, res = 0, isadmin = ast_test_flag(&conference_bridge_user->flags, OPTION_ADMIN);
/* See if music on hold is playing */
ao2_lock(conference_bridge);
if (conference_bridge->users == 1 && ast_test_flag(&conference_bridge_user->flags, OPTION_MUSICONHOLD)) {
/* Just us so MOH is probably indeed going, let's stop it */
ast_moh_stop(bridge_channel->chan);
}
ao2_unlock(conference_bridge);
/* Try to play back the user menu, if it fails pass this back up so the bridging core will act on it */
if (ast_streamfile(bridge_channel->chan, (isadmin ? "conf-adminmenu" : "conf-usermenu"), bridge_channel->chan->language)) {
res = -1;
goto finished;
}
/* Wait for them to enter a digit from the user menu options */
digit = ast_waitstream(bridge_channel->chan, AST_DIGIT_ANY);
ast_stopstream(bridge_channel->chan);
if (digit == '1') {
/* 1 - Mute or unmute yourself, note we only allow manipulation if they aren't waiting for a marked user or if marked users exist */
if (!ast_test_flag(&conference_bridge_user->flags, OPTION_WAITMARKED) || conference_bridge->markedusers) {
conference_bridge_user->features.mute = (!conference_bridge_user->features.mute ? 1 : 0);
}
res = ast_stream_and_wait(bridge_channel->chan, (conference_bridge_user->features.mute ? "conf-muted" : "conf-unmuted"), "");
} else if (isadmin && digit == '2') {
/* 2 - Unlock or lock conference */
conference_bridge->locked = (!conference_bridge->locked ? 1 : 0);
res = ast_stream_and_wait(bridge_channel->chan, (conference_bridge->locked ? "conf-lockednow" : "conf-unlockednow"), "");
} else if (isadmin && digit == '3') {
/* 3 - Eject last user */
struct conference_bridge_user *last_participant = NULL;
ao2_lock(conference_bridge);
if (((last_participant = AST_LIST_LAST(&conference_bridge->users_list)) == conference_bridge_user) || (ast_test_flag(&last_participant->flags, OPTION_ADMIN))) {
ao2_unlock(conference_bridge);
res = ast_stream_and_wait(bridge_channel->chan, "conf-errormenu", "");
} else {
last_participant->kicked = 1;
ast_bridge_remove(conference_bridge->bridge, last_participant->chan);
ao2_unlock(conference_bridge);
}
} else if (digit == '4') {
/* 4 - Decrease listening volume */
ast_audiohook_volume_adjust(conference_bridge_user->chan, AST_AUDIOHOOK_DIRECTION_WRITE, -1);
} else if (digit == '6') {
/* 6 - Increase listening volume */
ast_audiohook_volume_adjust(conference_bridge_user->chan, AST_AUDIOHOOK_DIRECTION_WRITE, 1);
} else if (digit == '7') {
/* 7 - Decrease talking volume */
ast_audiohook_volume_adjust(conference_bridge_user->chan, AST_AUDIOHOOK_DIRECTION_READ, -1);
} else if (digit == '8') {
/* 8 - Exit the IVR */
} else if (digit == '9') {
/* 9 - Increase talking volume */
ast_audiohook_volume_adjust(conference_bridge_user->chan, AST_AUDIOHOOK_DIRECTION_READ, 1);
} else {
/* No valid option was selected */
res = ast_stream_and_wait(bridge_channel->chan, "conf-errormenu", "");
}
finished:
/* See if music on hold needs to be started back up again */
ao2_lock(conference_bridge);
if (conference_bridge->users == 1 && ast_test_flag(&conference_bridge_user->flags, OPTION_MUSICONHOLD)) {
ast_moh_start(bridge_channel->chan, conference_bridge_user->opt_args[OPTION_MUSICONHOLD_CLASS], NULL);
}
ao2_unlock(conference_bridge);
bridge_channel->state = AST_BRIDGE_CHANNEL_STATE_WAIT;
return res;
}
/*! \brief The ConfBridge application */
static int confbridge_exec(struct ast_channel *chan, const char *data)
{
int res = 0, volume_adjustments[2];
char *parse;
struct conference_bridge *conference_bridge = NULL;
struct conference_bridge_user conference_bridge_user = {
.chan = chan,
};
const char *tmp, *join_sound = NULL, *leave_sound = NULL;
AST_DECLARE_APP_ARGS(args,
AST_APP_ARG(conf_name);
AST_APP_ARG(options);
);
if (ast_strlen_zero(data)) {
ast_log(LOG_WARNING, "%s requires an argument (conference name[,options])\n", app);
return -1;
}
/* We need to make a copy of the input string if we are going to modify it! */
parse = ast_strdupa(data);
AST_STANDARD_APP_ARGS(args, parse);
if (args.argc == 2) {
ast_app_parse_options(app_opts, &conference_bridge_user.flags, conference_bridge_user.opt_args, args.options);
}
/* Look for a conference bridge matching the provided name */
if (!(conference_bridge = join_conference_bridge(args.conf_name, &conference_bridge_user))) {
return -1;
}
/* Keep a copy of volume adjustments so we can restore them later if need be */
volume_adjustments[0] = ast_audiohook_volume_get(chan, AST_AUDIOHOOK_DIRECTION_READ);
volume_adjustments[1] = ast_audiohook_volume_get(chan, AST_AUDIOHOOK_DIRECTION_WRITE);
/* Always initialize the features structure, we are in most cases always going to need it. */
ast_bridge_features_init(&conference_bridge_user.features);
/* If the menu option is enabled provide a user or admin menu as a custom feature hook */
if (ast_test_flag(&conference_bridge_user.flags, OPTION_MENU)) {
ast_bridge_features_hook(&conference_bridge_user.features, "#", menu_callback, &conference_bridge_user);
}
/* If the caller should be joined already muted, make it so */
if (ast_test_flag(&conference_bridge_user.flags, OPTION_STARTMUTED)) {
conference_bridge_user.features.mute = 1;
}
/* Grab join/leave sounds from the channel */
ast_channel_lock(chan);
if ((tmp = pbx_builtin_getvar_helper(chan, "CONFBRIDGE_JOIN_SOUND"))) {
join_sound = ast_strdupa(tmp);
}
if ((tmp = pbx_builtin_getvar_helper(chan, "CONFBRIDGE_LEAVE_SOUND"))) {
leave_sound = ast_strdupa(tmp);
}
ast_channel_unlock(chan);
/* If there is 1 or more people already in the conference then play our join sound unless overridden */
if (!ast_test_flag(&conference_bridge_user.flags, OPTION_QUIET) && !ast_strlen_zero(join_sound) && conference_bridge->users >= 2) {
ast_autoservice_start(chan);
play_sound_file(conference_bridge, join_sound);
ast_autoservice_stop(chan);
}
/* Join our conference bridge for real */
ast_bridge_join(conference_bridge->bridge, chan, NULL, &conference_bridge_user.features);
/* If there is 1 or more people (not including us) already in the conference then play our leave sound unless overridden */
if (!ast_test_flag(&conference_bridge_user.flags, OPTION_QUIET) && !ast_strlen_zero(leave_sound) && conference_bridge->users >= 2) {
ast_autoservice_start(chan);
play_sound_file(conference_bridge, leave_sound);
ast_autoservice_stop(chan);
}
/* Easy as pie, depart this channel from the conference bridge */
leave_conference_bridge(conference_bridge, &conference_bridge_user);
conference_bridge = NULL;
/* Can't forget to clean up the features structure, or else we risk a memory leak */
ast_bridge_features_cleanup(&conference_bridge_user.features);
/* If the user was kicked from the conference play back the audio prompt for it */
if (!ast_test_flag(&conference_bridge_user.flags, OPTION_QUIET) && conference_bridge_user.kicked) {
res = ast_stream_and_wait(chan, "conf-kicked", "");
}
/* Restore volume adjustments to previous values in case they were changed */
if (volume_adjustments[0]) {
ast_audiohook_volume_set(chan, AST_AUDIOHOOK_DIRECTION_READ, volume_adjustments[0]);
}
if (volume_adjustments[1]) {
ast_audiohook_volume_set(chan, AST_AUDIOHOOK_DIRECTION_WRITE, volume_adjustments[1]);
}
return res;
}
/*! \brief Called when module is being unloaded */
static int unload_module(void)
{
int res = ast_unregister_application(app);
/* Get rid of the conference bridges container. Since we only allow dynamic ones none will be active. */
ao2_ref(conference_bridges, -1);
return res;
}
/*! \brief Called when module is being loaded */
static int load_module(void)
{
/* Create a container to hold the conference bridges */
if (!(conference_bridges = ao2_container_alloc(CONFERENCE_BRIDGE_BUCKETS, conference_bridge_hash_cb, conference_bridge_cmp_cb))) {
return AST_MODULE_LOAD_DECLINE;
}
if (ast_register_application_xml(app, confbridge_exec)) {
ao2_ref(conference_bridges, -1);
return AST_MODULE_LOAD_DECLINE;
}
return AST_MODULE_LOAD_SUCCESS;
}
AST_MODULE_INFO(ASTERISK_GPL_KEY, AST_MODFLAG_LOAD_ORDER, "Conference Bridge Application",
.load = load_module,
.unload = unload_module,
.load_pri = AST_MODPRI_DEVSTATE_PROVIDER,
);
Reference in new issue View Git Blame Copy Permalink