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/*
* Asterisk -- An open source telephony toolkit.
*
* Copyright (C) 2013 Digium, Inc.
*
* Richard Mudgett <rmudgett@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 ConfBridge announcer channel driver
*
* \author Richard Mudgett <rmudgett@digium.com>
*
* See Also:
* \arg \ref AstCREDITS
*/
#include "asterisk.h"
#include "asterisk/channel.h"
#include "asterisk/bridge.h"
#include "asterisk/core_unreal.h"
#include "include/confbridge.h"
/* ------------------------------------------------------------------- */
/*! ConfBridge announcer channel private. */
struct announce_pvt {
/*! Unreal channel driver base class values. */
struct ast_unreal_pvt base;
/*! Conference bridge associated with this announcer. */
struct ast_bridge *bridge;
};
static int announce_call(struct ast_channel *chan, const char *addr, int timeout)
{
/* Make sure anyone calling ast_call() for this channel driver is going to fail. */
return -1;
}
static int announce_hangup(struct ast_channel *ast)
{
struct announce_pvt *p = ast_channel_tech_pvt(ast);
int res;
if (!p) {
return -1;
}
/* give the pvt a ref to fulfill calling requirements. */
ao2_ref(p, +1);
res = ast_unreal_hangup(&p->base, ast);
ao2_ref(p, -1);
return res;
}
static void announce_pvt_destructor(void *vdoomed)
{
struct announce_pvt *doomed = vdoomed;
ao2_cleanup(doomed->bridge);
doomed->bridge = NULL;
ast_unreal_destructor(&doomed->base);
}
static struct ast_channel *announce_request(const char *type, struct ast_format_cap *cap, const struct ast_assigned_ids *assignedids, const struct ast_channel *requestor, const char *data, int *cause)
{
struct ast_channel *chan;
const char *conf_name = data;
RAII_VAR(struct confbridge_conference *, conference, NULL, ao2_cleanup);
RAII_VAR(struct announce_pvt *, pvt, NULL, ao2_cleanup);
conference = ao2_find(conference_bridges, conf_name, OBJ_KEY);
if (!conference) {
return NULL;
}
ast_assert(conference->bridge != NULL);
/* Allocate a new private structure and then Asterisk channels */
pvt = (struct announce_pvt *) ast_unreal_alloc(sizeof(*pvt), announce_pvt_destructor,
cap);
if (!pvt) {
return NULL;
}
ast_set_flag(&pvt->base, AST_UNREAL_NO_OPTIMIZATION);
ast_copy_string(pvt->base.name, conf_name, sizeof(pvt->base.name));
pvt->bridge = conference->bridge;
ao2_ref(pvt->bridge, +1);
chan = ast_unreal_new_channels(&pvt->base, conf_announce_get_tech(),
AST_STATE_UP, AST_STATE_UP, NULL, NULL, assignedids, requestor, 0);
if (chan) {
ast_answer(pvt->base.owner);
ast_answer(pvt->base.chan);
if (ast_channel_add_bridge_role(pvt->base.chan, "announcer")) {
ast_hangup(chan);
chan = NULL;
}
}
return chan;
}
static struct ast_channel_tech announce_tech = {
.type = "CBAnn",
.description = "Conference Bridge Announcing Channel",
.requester = announce_request,
.call = announce_call,
.hangup = announce_hangup,
.send_digit_begin = ast_unreal_digit_begin,
.send_digit_end = ast_unreal_digit_end,
.read = ast_unreal_read,
.write = ast_unreal_write,
.write_video = ast_unreal_write,
.exception = ast_unreal_read,
.indicate = ast_unreal_indicate,
.fixup = ast_unreal_fixup,
.send_html = ast_unreal_sendhtml,
.send_text = ast_unreal_sendtext,
.queryoption = ast_unreal_queryoption,
.setoption = ast_unreal_setoption,
.properties = AST_CHAN_TP_INTERNAL,
};
struct ast_channel_tech *conf_announce_get_tech(void)
{
return &announce_tech;
}
int conf_announce_channel_push(struct ast_channel *ast)
{
struct ast_bridge_features *features;
struct ast_channel *chan;
RAII_VAR(struct announce_pvt *, p, NULL, ao2_cleanup);
{
SCOPED_CHANNELLOCK(lock, ast);
p = ast_channel_tech_pvt(ast);
if (!p) {
return -1;
}
ao2_ref(p, +1);
chan = p->base.chan;
if (!chan) {
return -1;
}
}
features = ast_bridge_features_new();
if (!features) {
return -1;
}
ast_set_flag(&features->feature_flags, AST_BRIDGE_CHANNEL_FLAG_IMMOVABLE);
/* Impart the output channel into the bridge */
if (ast_bridge_impart(p->bridge, chan, NULL, features,
AST_BRIDGE_IMPART_CHAN_INDEPENDENT)) {
return -1;
}
ao2_lock(p);
ast_set_flag(&p->base, AST_UNREAL_CARETAKER_THREAD);
ao2_unlock(p);
return 0;
}
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