Merge branch 'feat/esp_netif_custom_impl' into 'master'

feat(esp_netif): Add support for esp_netif with custom TCP/IP stack

Closes IDF-6375

See merge request espressif/esp-idf!31593

Author: david-cermak

components/esp_netif/Kconfig

@@ -13,9 +13,18 @@ menu "ESP NETIF Adapter"
             the timer expires. The IP lost timer is stopped if the station get the IP again before
             the timer expires.
 
+    config ESP_NETIF_PROVIDE_CUSTOM_IMPLEMENTATION
+        bool "Use only ESP-NETIF headers"
+        default n
+        help
+            No implementation of ESP-NETIF functions is provided.
+            This option is used for adding a custom TCP/IP stack and defining related
+            esp_netif functionality
+
     choice ESP_NETIF_USE_TCPIP_STACK_LIB
         prompt "TCP/IP Stack Library"
         default ESP_NETIF_TCPIP_LWIP
+        depends on !ESP_NETIF_PROVIDE_CUSTOM_IMPLEMENTATION
         help
             Choose the TCP/IP Stack to work, for example, LwIP, uIP, etc.
         config ESP_NETIF_TCPIP_LWIP

components/esp_netif/loopback/esp_netif_loopback.c

@@ -1,5 +1,5 @@
 /*
- * SPDX-FileCopyrightText: 2015-2022 Espressif Systems (Shanghai) CO LTD
+ * SPDX-FileCopyrightText: 2015-2024 Espressif Systems (Shanghai) CO LTD
  *
  * SPDX-License-Identifier: Apache-2.0
  */
@@ -465,4 +465,23 @@ esp_err_t esp_netif_remove_ip6_address(esp_netif_t *esp_netif, const esp_ip6_add
     return ESP_ERR_NOT_SUPPORTED;
 }
 
+int esp_netif_get_all_ip6(esp_netif_t *esp_netif, esp_ip6_addr_t if_ip6[])
+{
+    return 0;
+}
+
+esp_ip6_addr_type_t esp_netif_ip6_get_addr_type(esp_ip6_addr_t* ip6_addr)
+{
+    return ESP_IP6_ADDR_IS_UNKNOWN;
+}
+
+esp_err_t esp_netif_tcpip_exec(esp_netif_callback_fn fn, void*ctx)
+{
+    return fn(ctx);
+}
+
+esp_netif_t *esp_netif_get_handle_from_ifkey(const char *if_key)
+{
+    return esp_netif_get_handle_from_ifkey_unsafe(if_key);
+}
 #endif /* CONFIG_ESP_NETIF_LOOPBACK */

components/esp_netif/test_apps/test_app_esp_netif/main/CMakeLists.txt

@@ -1,5 +1,11 @@
-idf_component_register(SRCS "esp_netif_test.c"
-                       REQUIRES test_utils
-                       INCLUDE_DIRS "."
-                       PRIV_INCLUDE_DIRS "$ENV{IDF_PATH}/components/esp_netif/private_include" "."
-                       PRIV_REQUIRES unity esp_netif nvs_flash esp_wifi)
+if(CONFIG_ESP_NETIF_TCPIP_LWIP)
+    set(srcs_test_stack esp_netif_test_lwip.c)
+elseif(CONFIG_ESP_NETIF_LOOPBACK)
+    set(srcs_test_stack esp_netif_test_loopback.c)
+endif()
+
+idf_component_register(SRCS esp_netif_test.c ${srcs_test_stack}
+                   REQUIRES test_utils
+                   INCLUDE_DIRS "."
+                   PRIV_INCLUDE_DIRS "$ENV{IDF_PATH}/components/esp_netif/private_include" "."
+                   PRIV_REQUIRES unity esp_netif nvs_flash esp_wifi)