Mdns not working in bridge example (IDFGH-14428)

[abeer0348]

Answers checklist.

• I have read the documentation ESP-IDF Programming Guide and the issue is not addressed there.
• I have updated my IDF branch (master or release) to the latest version and checked that the issue is present there.
• I have searched the issue tracker for a similar issue and not found a similar issue.

General issue report

ESP-IDF Version: v5.3.1
Project: Bridge Example
I am trying to run mDNS in a bridge configuration, but it appears to be non-functional.
Initially, I used the default configurations:

CONFIG_MDNS_PREDEF_NETIF_STA=y
CONFIG_MDNS_PREDEF_NETIF_AP=y
CONFIG_MDNS_PREDEF_NETIF_ETH=y

However, it did not work as expected.
Next, I registered the bridge network interface using mdns_register_netif and called the mdns_netif_action function, but the output remained the same. I also increased the maximum number of interfaces:

MDNS_MAX_INTERFACES=5

After that, I disabled the predefined network interfaces and tried again by registering only the bridge network interface:

# CONFIG_MDNS_PREDEF_NETIF_STA is not set
# CONFIG_MDNS_PREDEF_NETIF_AP is not set
# CONFIG_MDNS_PREDEF_NETIF_ETH is not set

Despite these changes, mDNS still does not seem to work.

Question:

Is mDNS support for the bridge configuration not implemented, or am I missing something?

Code

esp_err_t err = mdns_init();
if (err != ESP_OK)
{
    ESP_LOGE(TAG, "Failed to initialize mDNS: %s", esp_err_to_name(err));
    return;
}

err = mdns_hostname_set("mywebbie");
if (err != ESP_OK)
{
    ESP_LOGE(TAG, "Failed to set hostname: %s", esp_err_to_name(err));
    mdns_free();
    return;
}

ESP_LOGI(TAG, "mDNS hostname set to: %s", "mywebbie");

const char *instance_name = "Webbie Device";
err = mdns_instance_name_set(instance_name);
if (err != ESP_OK)
{
    ESP_LOGE(TAG, "Failed to set instance name: %s", esp_err_to_name(err));
}
else
{
    ESP_LOGI(TAG, "mDNS instance name set to: %s", instance_name);
}
ESP_ERROR_CHECK(mdns_register_netif(br_netif));
ESP_ERROR_CHECK(mdns_netif_action(br_netif, MDNS_EVENT_ENABLE_IP4 /*| MDNS_EVENT_ENABLE_IP6 */ | MDNS_EVENT_IP4_REVERSE_LOOKUP | MDNS_EVENT_IP6_REVERSE_LOOKUP));