lwip/linux: Add lwip support for networking component under linux

linux/lwip: Wrap some IO posix functions
* to workaourd the FreeRTOS EINTR issue (when building without lwip)
* to correctly choose the sub-system based on fd (when building with
lwip) -- passing control to either linux/system or to lwip
This commit also addapts tapio-if to provide DHCP client by default and
configurable settings for static IP

components/linux/CMakeLists.txt

@@ -3,6 +3,5 @@ if(NOT "${target}" STREQUAL "linux")
     return()
 endif()
 
-idf_component_register(SRCS esp_event_stubs.c
-                       INCLUDE_DIRS include ${IDF_PATH}/components/esp_event/include
+idf_component_register(INCLUDE_DIRS include
                        REQUIRED_IDF_TARGETS linux)

components/linux/esp_event_stubs.c

@@ -1,18 +0,0 @@
-/*
- * SPDX-FileCopyrightText: 2023 Espressif Systems (Shanghai) CO LTD
- *
- * SPDX-License-Identifier: Apache-2.0
- */
-#include "esp_err.h"
-#include "esp_event.h"
-
-esp_err_t esp_event_loop_create_default(void)
-{
-    return ESP_OK;
-}
-
-esp_err_t esp_event_post(esp_event_base_t event_base, int32_t event_id,
-        const void* event_data, size_t event_data_size, TickType_t ticks_to_wait)
-{
-    return ESP_OK;
-}

components/linux/include/esp_linux_helper.h

@@ -9,7 +9,7 @@
 extern "C" {
 #endif
 
-#if CONFIG_IDF_TARGET_LINUX
+#if CONFIG_IDF_TARGET_LINUX && !defined(__containerof)
 #define __containerof(ptr, type, member) ({         \
     const typeof( ((type *)0)->member ) *__mptr = (ptr); \
     (type *)( (char *)__mptr - offsetof(type,member) );})