fix(mdns): fix the logic of creating pcb for networking socket

Author: wqx6

components/mdns/mdns_networking_socket.c

@@ -1,5 +1,5 @@
 /*
- * SPDX-FileCopyrightText: 2021-2023 Espressif Systems (Shanghai) CO LTD
+ * SPDX-FileCopyrightText: 2021-2024 Espressif Systems (Shanghai) CO LTD
  *
  * SPDX-License-Identifier: Apache-2.0
  */
@@ -352,17 +352,9 @@ static bool create_pcb(mdns_if_t tcpip_if, mdns_ip_protocol_t ip_protocol)
     }
     int sock = s_interfaces[tcpip_if].sock;
     esp_netif_t *netif = _mdns_get_esp_netif(tcpip_if);
-    if (sock >= 0) {
-        mdns_ip_protocol_t other_ip_proto = ip_protocol == MDNS_IP_PROTOCOL_V4 ? MDNS_IP_PROTOCOL_V6 : MDNS_IP_PROTOCOL_V4;
-        int err = join_mdns_multicast_group(sock, netif, other_ip_proto);
-        if (err < 0) {
-            ESP_LOGE(TAG, "Failed to add ipv6 multicast group for protocol %d", ip_protocol);
-            return false;
-        }
-        s_interfaces[tcpip_if].proto |= (other_ip_proto == MDNS_IP_PROTOCOL_V4 ? PROTO_IPV4 : PROTO_IPV6);
-        return true;
+    if (sock < 0) {
+        sock = create_socket(netif);
     }
-    sock = create_socket(netif);
     if (sock < 0) {
         ESP_LOGE(TAG, "Failed to create the socket!");
         return false;