NAT re-init after band switch

Author: martin-ger

firmware_esp32c5/bootloader.bin

@@ -1,7 +1,7 @@
 ESP32 NAT Router Build Information
 =================================
 Target: ESP32-C5 (esp32c5)
-Build Time: 2026-05-27 11:35:32
-Git Hash: f0d5a14
+Build Time: 2026-05-28 17:47:33
+Git Hash: 434d9db
 Binary Files: 4
 Build Directory: build

firmware_esp32c5/build_info.txt

@@ -692,13 +692,22 @@ static void wifi_event_handler(void* arg, esp_event_base_t event_base,
             xTaskCreate(vpn_connect_task, "vpn_connect", 4096, NULL, 5, NULL);
         }
 
+        /* Re-enable NAPT here in case the AP cycled (channel change from
+         * band-aware scan) after the initial ip_napt_enable in app_main. */
+        if (ap_nat_enabled)
+            ip_napt_enable(my_ap_ip, 1);
+
         xEventGroupSetBits(wifi_event_group, WIFI_CONNECTED_BIT);
     }
     else if (event_base == WIFI_EVENT && event_id == WIFI_EVENT_AP_START)
     {
         ESP_LOGI(TAG, "AP started");
         // Initialize AP netif hooks now that interface is ready
         init_ap_netif_hooks();
+        /* Re-enable NAPT on every AP start: covers the initial start and any
+         * restart caused by the band-aware scan forcing a channel change. */
+        if (ap_nat_enabled && my_ap_ip != 0)
+            ip_napt_enable(my_ap_ip, 1);
     }
     else if (event_base == WIFI_EVENT && event_id == WIFI_EVENT_AP_STACONNECTED)
     {