+static void mqtt_free (mqtt_client_conf_t *conf)
+{
+ if (conf == NULL)
+ return;
+
+ if (conf->connected)
+ (void) mosquitto_disconnect (conf->mosq);
+ conf->connected = 0;
+ (void) mosquitto_destroy (conf->mosq);
+
+ sfree (conf->host);
+ sfree (conf->username);
+ sfree (conf->password);
+ sfree (conf->client_id);
+ sfree (conf->topic_prefix);
+ sfree (conf);
+}
+
+static char *strip_prefix (char *topic)
+{
+ size_t num;
+ size_t i;
+
+ num = 0;
+ for (i = 0; topic[i] != 0; i++)
+ if (topic[i] == '/')
+ num++;
+
+ if (num < 2)
+ return (NULL);
+
+ while (num > 2)
+ {
+ char *tmp = strchr (topic, '/');
+ if (tmp == NULL)
+ return (NULL);
+ topic = tmp + 1;
+ num--;
+ }
+
+ return (topic);
+}
+
+static void on_message (__attribute__((unused)) void *arg,
+ const struct mosquitto_message *msg)
+{
+ value_list_t vl = VALUE_LIST_INIT;
+ data_set_t const *ds;
+ char *topic;
+ char *name;
+ char *payload;
+ int status;
+
+ if ((msg->payloadlen <= 0) || (msg->payload[msg->payloadlen - 1] != 0))
+ return;
+
+ topic = strdup (msg->topic);
+ name = strip_prefix (topic);
+
+ status = parse_identifier_vl (name, &vl);
+ if (status != 0)
+ {
+ ERROR ("mqtt plugin: Unable to parse topic \"%s\".", topic);
+ sfree (topic);
+ return;
+ }
+ sfree (topic);
+
+ ds = plugin_get_ds (vl.type);
+ if (ds == NULL)
+ {
+ ERROR ("mqtt plugin: Unknown type: \"%s\".", vl.type);
+ return;
+ }
+
+ vl.values = calloc (ds->ds_num, sizeof (*vl.values));
+ if (vl.values == NULL)
+ {
+ ERROR ("mqtt plugin: calloc failed.");
+ return;
+ }
+ vl.values_len = ds->ds_num;
+
+ payload = strdup ((void *) msg->payload);
+ DEBUG ("mqtt plugin: payload = \"%s\"", payload);
+ status = parse_values (payload, &vl, ds);
+ if (status != 0)
+ {
+ ERROR ("mqtt plugin: Unable to parse payload \"%s\".", payload);
+ sfree (payload);
+ sfree (vl.values);
+ return;
+ }
+ sfree (payload);
+
+ plugin_dispatch_values (&vl);
+ sfree (vl.values);
+} /* void on_message */
+
+/* must hold conf->lock when calling. */
+static int mqtt_reconnect (mqtt_client_conf_t *conf)