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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"
- ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
- #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, NULL);
- 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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