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- /*
- * 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 The Asterisk Management Interface - AMI (MWI event handling)
- *
- * \author Matt Jordan <mjordan@digium.com>
- */
- #include "asterisk.h"
- ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
- #include "asterisk/manager.h"
- #include "asterisk/app.h"
- #include "asterisk/channel.h"
- #include "asterisk/stasis_message_router.h"
- #include "asterisk/stasis.h"
- struct stasis_message_router *mwi_state_router;
- /*** DOCUMENTATION
- ***/
- /*! \brief The \ref stasis subscription returned by the forwarding of the MWI topic
- * to the manager topic
- */
- static struct stasis_forward *topic_forwarder;
- /*! \brief Callback function used by \ref mwi_app_event_cb to weed out "Event" keys */
- static int exclude_event_cb(const char *key)
- {
- if (!strcmp(key, "Event")) {
- return -1;
- }
- return 0;
- }
- /*! \brief Generic MWI event callback used for one-off events from voicemail modules */
- static void mwi_app_event_cb(void *data, struct stasis_subscription *sub,
- struct stasis_message *message)
- {
- struct ast_mwi_blob *payload = stasis_message_data(message);
- RAII_VAR(struct ast_str *, channel_event_string, NULL, ast_free);
- RAII_VAR(struct ast_str *, event_buffer, NULL, ast_free);
- struct ast_json *event_json = ast_json_object_get(payload->blob, "Event");
- if (!event_json) {
- return;
- }
- if (payload->mwi_state && payload->mwi_state->snapshot) {
- channel_event_string = ast_manager_build_channel_state_string(payload->mwi_state->snapshot);
- }
- event_buffer = ast_manager_str_from_json_object(payload->blob, exclude_event_cb);
- if (!event_buffer) {
- ast_log(AST_LOG_WARNING, "Failed to create payload for event %s\n", ast_json_string_get(event_json));
- return;
- }
- manager_event(EVENT_FLAG_CALL, ast_json_string_get(event_json),
- "Mailbox: %s\r\n"
- "%s"
- "%s",
- payload->mwi_state ? payload->mwi_state->uniqueid : "Unknown",
- ast_str_buffer(event_buffer),
- channel_event_string ? ast_str_buffer(channel_event_string) : "");
- }
- static void mwi_update_cb(void *data, struct stasis_subscription *sub,
- struct stasis_message *message)
- {
- struct ast_mwi_state *mwi_state;
- RAII_VAR(struct ast_str *, channel_event_string, NULL, ast_free);
- if (ast_mwi_state_type() != stasis_message_type(message)) {
- return;
- }
- mwi_state = stasis_message_data(message);
- if (!mwi_state) {
- return;
- }
- if (mwi_state->snapshot) {
- channel_event_string = ast_manager_build_channel_state_string(mwi_state->snapshot);
- }
- /*** DOCUMENTATION
- <managerEventInstance>
- <synopsis>Raised when the state of messages in a voicemail mailbox
- has changed or when a channel has finished interacting with a
- mailbox.</synopsis>
- <syntax>
- <channel_snapshot/>
- <parameter name="Mailbox">
- <para>The mailbox with the new message, specified as <literal>mailbox</literal>@<literal>context</literal></para>
- </parameter>
- <parameter name="Waiting">
- <para>Whether or not the mailbox has messages waiting for it.</para>
- </parameter>
- <parameter name="New">
- <para>The number of new messages.</para>
- </parameter>
- <parameter name="Old">
- <para>The number of old messages.</para>
- </parameter>
- </syntax>
- <description>
- <note><para>The Channel related parameters are only present if a
- channel was involved in the manipulation of a mailbox. If no
- channel is involved, the parameters are not included with the
- event.</para>
- </note>
- </description>
- </managerEventInstance>
- ***/
- manager_event(EVENT_FLAG_CALL, "MessageWaiting",
- "%s"
- "Mailbox: %s\r\n"
- "Waiting: %d\r\n"
- "New: %d\r\n"
- "Old: %d\r\n",
- AS_OR(channel_event_string, ""),
- mwi_state->uniqueid,
- ast_app_has_voicemail(mwi_state->uniqueid, NULL),
- mwi_state->new_msgs,
- mwi_state->old_msgs);
- }
- static void manager_mwi_shutdown(void)
- {
- stasis_forward_cancel(topic_forwarder);
- topic_forwarder = NULL;
- }
- int manager_mwi_init(void)
- {
- int ret = 0;
- struct stasis_topic *manager_topic;
- struct stasis_topic *mwi_topic;
- struct stasis_message_router *message_router;
- manager_topic = ast_manager_get_topic();
- if (!manager_topic) {
- return -1;
- }
- message_router = ast_manager_get_message_router();
- if (!message_router) {
- return -1;
- }
- mwi_topic = ast_mwi_topic_all();
- if (!mwi_topic) {
- return -1;
- }
- topic_forwarder = stasis_forward_all(mwi_topic, manager_topic);
- if (!topic_forwarder) {
- return -1;
- }
- ast_register_cleanup(manager_mwi_shutdown);
- ret |= stasis_message_router_add(message_router,
- ast_mwi_state_type(),
- mwi_update_cb,
- NULL);
- ret |= stasis_message_router_add(message_router,
- ast_mwi_vm_app_type(),
- mwi_app_event_cb,
- NULL);
- /* If somehow we failed to add any routes, just shut down the whole
- * thing and fail it.
- */
- if (ret) {
- manager_mwi_shutdown();
- return -1;
- }
- return 0;
- }
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