Merge pull request #728 from david-cermak/bump/mdns_1.4.3

[mdns]: bump: 1.4.2 -> 1.4.3

components/mdns/.cz.yaml

@@ -3,6 +3,6 @@ commitizen:
   bump_message: 'bump(mdns): $current_version -> $new_version'
   pre_bump_hooks: python ../../ci/changelog.py mdns
   tag_format: mdns-v$version
-  version: 1.4.2
+  version: 1.4.3
   version_files:
   - idf_component.yml

components/mdns/CHANGELOG.md

@@ -1,5 +1,11 @@
 # Changelog
 
+## [1.4.3](https://github.com/espressif/esp-protocols/commits/mdns-v1.4.3)
+
+### Features
+
+- support zero item when update subtype ([5bd82c01](https://github.com/espressif/esp-protocols/commit/5bd82c01))
+
 ## [1.4.2](https://github.com/espressif/esp-protocols/commits/mdns-v1.4.2)
 
 ### Features

components/mdns/idf_component.yml

@@ -1,4 +1,4 @@
-version: "1.4.2"
+version: "1.4.3"
 description: "Multicast UDP service used to provide local network service and host discovery."
 url: "https://github.com/espressif/esp-protocols/tree/master/components/mdns"
 issues: "https://github.com/espressif/esp-protocols/issues"

components/mdns/include/mdns.h

@@ -615,6 +615,8 @@ esp_err_t mdns_service_subtype_add_multiple_items_for_host(const char *instance_
  * @param  subtype          the pointer of subtype array to add.
  * @param  num_items        number of items in subtype array
  *
+ * @note  If `num_items` is 0, then remove all subtypes.
+ *
  * @return
  *     - ESP_OK success
  *     - ESP_ERR_INVALID_ARG Parameter error

components/mdns/mdns.c

@@ -6429,8 +6429,8 @@ esp_err_t mdns_service_subtype_update_multiple_items_for_host(const char *instan
     MDNS_SERVICE_LOCK();
     esp_err_t ret = ESP_OK;
     int cur_index = 0;
-    ESP_GOTO_ON_FALSE(_mdns_server && _mdns_server->services && !_str_null_or_empty(service_type) && !_str_null_or_empty(proto) &&
-                      (num_items > 0), ESP_ERR_INVALID_ARG, err, TAG, "Invalid state or arguments");
+    ESP_GOTO_ON_FALSE(_mdns_server && _mdns_server->services && !_str_null_or_empty(service_type) && !_str_null_or_empty(proto),
+                      ESP_ERR_INVALID_ARG, err, TAG, "Invalid state or arguments");
 
     mdns_srv_item_t *s = _mdns_get_service_item_instance(instance_name, service_type, proto, hostname);
     ESP_GOTO_ON_FALSE(s, ESP_ERR_NOT_FOUND, err, TAG, "Service doesn't exist");
@@ -6450,8 +6450,9 @@ esp_err_t mdns_service_subtype_update_multiple_items_for_host(const char *instan
             goto exit;
         }
     }
-
-    _mdns_announce_all_pcbs(&s, 1, false);
+    if (num_items) {
+        _mdns_announce_all_pcbs(&s, 1, false);
+    }
 err:
     if (ret == ESP_ERR_NO_MEM) {
         for (int idx = 0; idx < cur_index; idx++) {