Merge pull request #758 from david-cermak/fix/mdns_ignore_only_invalid_queries

[mdns]: Fix the responder to ignore only invalid queries

Author: david-cermak

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: 1.5.2
+  version: 1.5.3
   version_files:
   - idf_component.yml

components/mdns/CHANGELOG.md

@@ -1,5 +1,11 @@
 # Changelog
 
+## [1.5.3](https://github.com/espressif/esp-protocols/commits/mdns-v1.5.3)
+
+### Bug Fixes
+
+- Fix responder to ignore only invalid queries ([cd07228f](https://github.com/espressif/esp-protocols/commit/cd07228f), [#754](https://github.com/espressif/esp-protocols/issues/754))
+
 ## [1.5.2](https://github.com/espressif/esp-protocols/commits/mdns-v1.5.2)
 
 ### Bug Fixes

components/mdns/idf_component.yml

@@ -1,4 +1,4 @@
-version: "1.5.2"
+version: "1.5.3"
 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/mdns.c

@@ -1879,7 +1879,11 @@ static void _mdns_create_answer_from_parsed_packet(mdns_parsed_packet_t *parsed_
         shared = q->type == MDNS_TYPE_PTR || q->type == MDNS_TYPE_SDPTR || !parsed_packet->probe;
         if (q->type == MDNS_TYPE_SRV || q->type == MDNS_TYPE_TXT) {
             mdns_srv_item_t *service = _mdns_get_service_item_instance(q->host, q->service, q->proto, NULL);
-            if (service == NULL || !_mdns_create_answer_from_service(packet, service->service, q, shared, send_flush)) {
+            if (service == NULL) {  // Service not found, but we continue to the next question
+                q = q->next;
+                continue;
+            }
+            if (!_mdns_create_answer_from_service(packet, service->service, q, shared, send_flush)) {
                 _mdns_free_tx_packet(packet);
                 return;
             } else {