esp_netif: Enable use of the ESP-IDF with a non-LWIP (and non-BSD-style) IP stack.

Note: besides the esp-netif component, this commit also disables
net_sockets.c from mbedtls, which is one of the base components and uses BSD API (not specifically lwIP). This might be refactored to use CONFIG_SUPPORT_BSD_API instead of CONFIG_ESP_NETIF_TCPIP_LWIP
in the future.
It also disables smartconfig_ack.c and wifi_init.c from esp_wifi
component for referencing some lwIP config options (smartconfig_ack.c changes might be also
updated to check CONFIG_SUPPORT_BSD_API)

Merges https://github.com/espressif/esp-idf/pull/5856

components/esp_netif/loopback/esp_netif_loopback.c

@@ -18,6 +18,7 @@
 
 #include "esp_netif.h"
 #include "esp_netif_private.h"
+#include "esp_netif_sta_list.h"
 
 #if CONFIG_ESP_NETIF_LOOPBACK
 
@@ -432,7 +433,7 @@ const char *esp_netif_get_desc(esp_netif_t *esp_netif)
     return esp_netif->if_desc;
 }
 
-uint32_t esp_netif_get_event_id(esp_netif_t *esp_netif, esp_netif_ip_event_type_t event_type)
+int32_t esp_netif_get_event_id(esp_netif_t *esp_netif, esp_netif_ip_event_type_t event_type)
 {
     return 0;
 }

components/esp_netif/lwip/esp_netif_lwip_defaults.c

@@ -16,6 +16,8 @@
 #include "esp_netif_lwip_internal.h"
 #include "esp_netif_lwip_ppp.h"
 
+#ifdef CONFIG_ESP_NETIF_TCPIP_LWIP
+
 #include "netif/wlanif.h"
 #include "netif/ethernetif.h"
 
@@ -59,3 +61,5 @@ const esp_netif_netstack_config_t *_g_esp_netif_netstack_default_eth      = &s_e
 const esp_netif_netstack_config_t *_g_esp_netif_netstack_default_wifi_sta = &s_wifi_netif_config_sta;
 const esp_netif_netstack_config_t *_g_esp_netif_netstack_default_wifi_ap  = &s_wifi_netif_config_ap;
 const esp_netif_netstack_config_t *_g_esp_netif_netstack_default_ppp      = &s_netif_config_ppp;
+
+#endif /*CONFIG_ESP_NETIF_TCPIP_LWIP*/

components/esp_netif/lwip/esp_netif_lwip_internal.h

@@ -19,6 +19,8 @@
 #include "esp_netif_slip.h"
 #include "lwip/netif.h"
 
+#ifdef CONFIG_ESP_NETIF_TCPIP_LWIP
+
 struct esp_netif_netstack_lwip_vanilla_config {
     err_t (*init_fn)(struct netif*);
     void (*input_fn)(void *netif, void *buffer, size_t len, void *eb);
@@ -126,3 +128,5 @@ struct esp_netif_obj {
     char * if_desc;
     int route_prio;
 };
+
+#endif /* CONFIG_ESP_NETIF_TCPIP_LWIP */

components/esp_netif/lwip/esp_netif_lwip_ppp.c

@@ -12,8 +12,12 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#include "lwip/dns.h"
+
 #include "esp_netif.h"
+
+#ifdef CONFIG_ESP_NETIF_TCPIP_LWIP
+
+#include "lwip/dns.h"
 #include "netif/ppp/pppapi.h"
 #include "netif/ppp/pppos.h"
 #include "esp_log.h"
@@ -21,8 +25,8 @@
 #include "esp_event.h"
 #include "esp_netif_ppp.h"
 #include "esp_netif_lwip_internal.h"
-#include "lwip/ip6_addr.h"
 #include <string.h>
+#include "lwip/ip6_addr.h"
 
 ESP_EVENT_DEFINE_BASE(NETIF_PPP_STATUS);
 
@@ -384,3 +388,5 @@ esp_err_t esp_netif_ppp_set_params(esp_netif_t *netif, const esp_netif_ppp_confi
     LOG_PPP_DISABLED_AND_DO(return ESP_ERR_NOT_SUPPORTED)
 
 #endif /* PPPOS_SUPPORT */
+
+#endif /* CONFIG_ESP_NETIF_TCPIP_LWIP */

components/esp_netif/lwip/esp_netif_lwip_ppp.h

@@ -15,6 +15,8 @@
 #ifndef _ESP_NETIF_LWIP_PPP_H_
 #define _ESP_NETIF_LWIP_PPP_H_
 
+#if CONFIG_ESP_NETIF_TCPIP_LWIP
+
 /**
  * @brief  Creates new PPP related structure
  *
@@ -75,4 +77,7 @@ esp_err_t esp_netif_stop_ppp(netif_related_data_t *netif_related);
  */
 void esp_netif_ppp_set_default_netif(netif_related_data_t *netif_related);
 
-#endif // _ESP_NETIF_LWIP_PPP_H_
+#endif /* CONFIG_ESP_NETIF_TCPIP_LWIP */
+
+
+#endif // _ESP_NETIF_LWIP_PPP_H_

components/esp_netif/lwip/esp_netif_lwip_slip.c

@@ -13,12 +13,16 @@
 // limitations under the License.
 
 
-#include "lwip/dns.h"
+
 #include "esp_netif.h"
 #include "esp_log.h"
 #include "esp_netif_slip.h"
 #include "esp_netif_lwip_internal.h"
 #include "esp_netif_net_stack.h"
+
+#ifdef CONFIG_ESP_NETIF_TCPIP_LWIP
+
+#include "lwip/dns.h"
 #include "lwip/opt.h"
 #include "lwip/ip6_addr.h"
 #include "lwip/netif.h"
@@ -296,3 +300,4 @@ void sio_send(uint8_t c, sio_fd_t fd)
         ESP_LOGD(TAG, "%s: uart_write_bytes error %i", __func__, ret);
     }
 }
+#endif /* CONFIG_ESP_NETIF_TCPIP_LWIP */

components/esp_wifi/src/smartconfig_ack.c

@@ -17,14 +17,17 @@
  * it will use UDP to send 'ACK' to cellphone.
  */
 
-#include <string.h>
 #include "freertos/FreeRTOS.h"
 #include "freertos/task.h"
-#include "lwip/sockets.h"
 #include "esp_netif.h"
 #include "esp_log.h"
 #include "esp_wifi.h"
 #include "esp_event.h"
+
+#if CONFIG_ESP_NETIF_TCPIP_LWIP
+
+#include <string.h>
+#include "lwip/sockets.h"
 #include "esp_smartconfig.h"
 #include "smartconfig_ack.h"
 
@@ -208,3 +211,6 @@ void sc_send_ack_stop(void)
 {
     s_sc_ack_send = false;
 }
+
+#endif
+

components/esp_wifi/src/wifi_init.c

@@ -149,6 +149,8 @@ static void esp_wifi_config_info(void)
 #ifdef CONFIG_ESP32_WIFI_RX_BA_WIN
     ESP_LOGI(TAG, "rx ba win: %d", CONFIG_ESP32_WIFI_RX_BA_WIN);
 #endif
+
+#ifdef CONFIG_ESP_NETIF_TCPIP_LWIP
     ESP_LOGI(TAG, "tcpip mbox: %d", CONFIG_LWIP_TCPIP_RECVMBOX_SIZE);
     ESP_LOGI(TAG, "udp mbox: %d", CONFIG_LWIP_UDP_RECVMBOX_SIZE);
     ESP_LOGI(TAG, "tcp mbox: %d", CONFIG_LWIP_TCP_RECVMBOX_SIZE);
@@ -171,6 +173,10 @@ static void esp_wifi_config_info(void)
 #ifdef CONFIG_LWIP_IRAM_OPTIMIZATION
     ESP_LOGI(TAG, "LWIP IRAM OP enabled");
 #endif
+
+#else
+    ESP_LOGI(TAG, "LWIP disabled");
+#endif
 }
 
 esp_err_t esp_wifi_init(const wifi_init_config_t *config)
@@ -241,3 +247,4 @@ void wifi_apb80m_release(void)
     esp_pm_lock_release(s_wifi_modem_sleep_lock);
 }
 #endif //CONFIG_PM_ENABLE
+

components/mbedtls/port/net_sockets.c

@@ -27,6 +27,8 @@
 #include MBEDTLS_CONFIG_FILE
 #endif
 
+#ifdef CONFIG_ESP_NETIF_TCPIP_LWIP
+
 #if !defined(MBEDTLS_NET_C)
 
 #if defined(MBEDTLS_PLATFORM_C)
@@ -441,3 +443,6 @@ void mbedtls_net_free( mbedtls_net_context *ctx )
 }
 
 #endif /* MBEDTLS_NET_C */
+
+#endif /* CONFIG_ESP_NETIF_TCPIP_LWIP */
+