res_ari_events: Fix shutdown ref leak.

ASTERISK-25308 #close
Reported by: Joshua Colp

Change-Id: I592785bf70ff4b63d00e535b482f40da8e82a082

res/ari/resource_events.c

@@ -426,13 +426,18 @@ static int event_session_alloc(struct ast_tcptls_session_instance *ser,
 	return 0;
 }
 
+void ast_ari_websocket_events_event_websocket_dtor(void)
+{
+	ao2_cleanup(event_session_registry);
+	event_session_registry = NULL;
+}
+
 int ast_ari_websocket_events_event_websocket_init(void)
 {
 	/* Try to instantiate the registry */
 	event_session_registry = ao2_container_alloc(EVENT_SESSION_NUM_BUCKETS,
 	                                             event_session_hash,
 	                                             event_session_compare);
-
 	if (!event_session_registry) {
 		/* This is bad, bad. */
 		ast_log(LOG_WARNING,

res/ari/resource_events.h

@@ -57,6 +57,13 @@ struct ast_ari_events_event_websocket_args {
  */
 int ast_ari_websocket_events_event_websocket_init(void);
 
+/*!
+ * \brief WebSocket connection for events.
+ *
+ * \return Nothing
+ */
+void ast_ari_websocket_events_event_websocket_dtor(void);
+
 /*!
  * \brief WebSocket connection for events.
  *

res/res_ari_events.c

@@ -462,6 +462,7 @@ static int unload_module(void)
 	ast_ari_remove_handler(&events);
 	ao2_cleanup(events.ws_server);
 	events.ws_server = NULL;
+	ast_ari_websocket_events_event_websocket_dtor();
 	stasis_app_unref();
 	return 0;
 }

rest-api-templates/ari_resource.h.mustache

@@ -102,6 +102,17 @@ void ast_ari_{{c_name}}_{{c_nickname}}(struct ast_variable *headers, struct ast_
  */
 int ast_ari_websocket_{{c_name}}_{{c_nickname}}_init(void);
 
+/*!
+ * \brief {{summary}}
+{{#notes}}
+ *
+ * {{{notes}}}
+{{/notes}}
+ *
+ * \return Nothing
+ */
+void ast_ari_websocket_{{c_name}}_{{c_nickname}}_dtor(void);
+
 /*!
  * \brief {{summary}}
 {{#notes}}