MQTT 5 publish topic alias support (#14067)

* mqtt_websockets bumps version
* use the new topic alias support in netdata

3 files changed, 26 insertions, 0 deletions

diff --git a/aclk/aclk.c b/aclk/aclk.c
index fb47f2347b..8822fa816c 100644
--- a/aclk/aclk.c
+++ b/aclk/aclk.c
@@ -365,6 +365,10 @@ static inline void mqtt_connected_actions(mqtt_wss_client client)
     aclk_rcvd_cloud_msgs = 0;
     aclk_connection_counter++;
 
+    aclk_topic_cache_iter_t iter = ACLK_TOPIC_CACHE_ITER_T_INITIALIZER;
+    while ((topic = (char*)aclk_topic_cache_iterate(&iter)) != NULL)
+        mqtt_wss_set_topic_alias(client, topic);
+
     aclk_send_agent_connection_update(client, 1);
 }
 
diff --git a/aclk/aclk_util.c b/aclk/aclk_util.c
index 01eaedc8e0..b6eea87c16 100644
--- a/aclk/aclk_util.c
+++ b/aclk/aclk_util.c
@@ -308,6 +308,24 @@ const char *aclk_get_topic(enum aclk_topics topic)
 }
 
 /*
+ * Allows iterating all topics in topic cache without
+ * having to resort to callbacks. 
+ */
+
+const char *aclk_topic_cache_iterate(aclk_topic_cache_iter_t *iter)
+{
+    if (!aclk_topic_cache) {
+        error("Topic cache not initialized when %s was called.", __FUNCTION__);
+        return NULL;
+    }
+
+    if (*iter >= aclk_topic_cache_items)
+        return NULL;
+
+    return aclk_topic_cache[(*iter)++]->topic;
+}
+
+/*
  * TBEB with randomness
  *
  * @param reset 1 - to reset the delay,
diff --git a/aclk/aclk_util.h b/aclk/aclk_util.h
index ed715e0466..b858fe7383 100644
--- a/aclk/aclk_util.h
+++ b/aclk/aclk_util.h
@@ -93,9 +93,13 @@ enum aclk_topics {
     ACLK_TOPICID_CTXS_UPDATED          = 20
 };
 
+typedef size_t aclk_topic_cache_iter_t;
+#define ACLK_TOPIC_CACHE_ITER_T_INITIALIZER (0)
+
 const char *aclk_get_topic(enum aclk_topics topic);
 int aclk_generate_topic_cache(struct json_object *json);
 void free_topic_cache(void);
+const char *aclk_topic_cache_iterate(aclk_topic_cache_iter_t *iter);
 // TODO
 // aclk_topics_reload //when claim id changes