ESP32: check whether the mdns service exists before deleting it (#35397)

Author: wqx6

src/platform/ESP32/ESP32DnssdImpl.cpp

@@ -177,6 +177,12 @@ CHIP_ERROR EspDnssdPublishService(const DnssdService * service, DnssdPublishCall
         }
     }
 
+    // Remove service before adding it
+    if (mdns_service_exists(service->mType, GetProtocolString(service->mProtocol), nullptr))
+    {
+        mdns_service_remove_for_host(service->mName, service->mType, GetProtocolString(service->mProtocol), nullptr);
+    }
+
     espError = mdns_service_add(service->mName, service->mType, GetProtocolString(service->mProtocol), service->mPort, items,
                                 service->mTextEntrySize);
     // The mdns_service_add will return error if we try to add an existing service
@@ -205,9 +211,18 @@ CHIP_ERROR EspDnssdPublishService(const DnssdService * service, DnssdPublishCall
 
 CHIP_ERROR EspDnssdRemoveServices()
 {
-    mdns_service_remove("_matter", "_tcp");
-    mdns_service_remove("_matterc", "_udp");
-    mdns_service_remove("_matterd", "_udp");
+    if (mdns_service_exists("_matter", "_tcp", nullptr))
+    {
+        mdns_service_remove("_matter", "_tcp");
+    }
+    if (mdns_service_exists("_matterc", "_udp", nullptr))
+    {
+        mdns_service_remove("_matterc", "_udp");
+    }
+    if (mdns_service_exists("_matterd", "_udp", nullptr))
+    {
+        mdns_service_remove("_matterd", "_udp");
+    }
     return CHIP_NO_ERROR;
 }