esp-netif/lwip: Introduce TCP/IP stack has BSD API

* This variable is automatically selected when lwip stack is chosen
* This commit also fixes lwip loopback configuration

components/esp_netif/Kconfig

@@ -20,6 +20,7 @@ menu "ESP NETIF Adapter"
             Choose the TCP/IP Stack to work, for example, LwIP, uIP, etc.
         config ESP_NETIF_TCPIP_LWIP
             bool "LwIP"
+            select ESP_NETIF_USES_TCPIP_WITH_BSD_API
             help
                 lwIP is a small independent implementation of the TCP/IP protocol suite.
 
@@ -31,6 +32,9 @@ menu "ESP NETIF Adapter"
 
     endchoice
 
+    config ESP_NETIF_USES_TCPIP_WITH_BSD_API
+        bool # Set to true if the chosen TCP/IP stack provides BSD socket API
+
     config ESP_NETIF_L2_TAP
         bool "Enable netif L2 TAP support"
         select ETH_TRANSMIT_MUTEX

components/esp_netif/include/lwip/esp_netif_net_stack.h

@@ -10,7 +10,9 @@
 #include "lwip/netif.h"
 #include "esp_netif_ppp.h"
 
-#if defined(CONFIG_ESP_NETIF_TCPIP_LWIP)
+#ifdef __cplusplus
+extern "C" {
+#endif
 
 typedef err_t (*init_fn_t)(struct netif*);
 typedef void (*input_fn_t)(void *netif, void *buffer, size_t len, void *eb);
@@ -72,4 +74,6 @@ err_t wlanif_init_sta(struct netif *netif);
  */
 void wlanif_input(void *h, void *buffer, size_t len, void* l2_buff);
 
-#endif // CONFIG_ESP_NETIF_TCPIP_LWIP
+#ifdef __cplusplus
+}
+#endif

components/esp_netif/loopback/esp_netif_loopback.c

@@ -32,6 +32,11 @@ static bool s_netif_up = false;
  *
  *
  */
+
+#ifndef NETIF_MAX_HWADDR_LEN
+#define NETIF_MAX_HWADDR_LEN 6U
+#endif
+
 struct esp_netif_obj {
     // default interface addresses
     uint8_t mac[NETIF_MAX_HWADDR_LEN];
@@ -112,9 +117,9 @@ static esp_err_t esp_netif_init_configuration(esp_netif_t *esp_netif, const esp_
     // Configure general esp-netif properties
     memcpy(esp_netif->mac, cfg->base->mac, NETIF_MAX_HWADDR_LEN);
     if (cfg->base->ip_info == NULL) {
-        ip4_addr_set_zero(&esp_netif->ip_info->ip);
+        esp_netif->ip_info->ip.addr = 0;
-        ip4_addr_set_zero(&esp_netif->ip_info->gw);
+        esp_netif->ip_info->gw.addr = 0;
-        ip4_addr_set_zero(&esp_netif->ip_info->netmask);
+        esp_netif->ip_info->netmask.addr = 0;
     } else {
         memcpy(esp_netif->ip_info, cfg->base->ip_info, sizeof(esp_netif_ip_info_t));
     }
@@ -450,7 +455,7 @@ esp_err_t esp_netif_leave_ip6_multicast_group(esp_netif_t *esp_netif, const esp_
     return ESP_ERR_NOT_SUPPORTED;
 }
 
-esp_err_t esp_netif_add_ip6_address(esp_netif_t *esp_netif, const esp_ip6_addr_t *addr, uint8_t preference)
+esp_err_t esp_netif_add_ip6_address(esp_netif_t *esp_netif, const ip_event_add_ip6_t *addr)
 {
     return ESP_ERR_NOT_SUPPORTED;
 }

components/esp_netif/lwip/esp_netif_lwip.c

@@ -17,8 +17,6 @@
 #include "esp_netif_private.h"
 #include "esp_random.h"
 
-#if defined(CONFIG_ESP_NETIF_TCPIP_LWIP)
-
 #include "lwip/tcpip.h"
 #include "lwip/dhcp.h"
 #include "lwip/ip_addr.h"
@@ -2275,5 +2273,3 @@ esp_err_t esp_netif_remove_ip6_address(esp_netif_t *esp_netif, const esp_ip6_add
     _RUN_IN_LWIP_TASK(esp_netif_remove_ip6_address_api, esp_netif, addr)
 
 #endif // CONFIG_LWIP_IPV6
-
-#endif /* CONFIG_ESP_NETIF_TCPIP_LWIP */

components/esp_netif/lwip/esp_netif_lwip_defaults.c

@@ -7,9 +7,9 @@
 #include "esp_netif.h"
 #include "esp_netif_lwip_internal.h"
 #include "lwip/esp_netif_net_stack.h"
+#if defined(CONFIG_PPP_SUPPORT)
 #include "esp_netif_lwip_ppp.h"
-
+#endif
-#if defined(CONFIG_ESP_NETIF_TCPIP_LWIP)
 
 #if CONFIG_ESP_NETIF_BRIDGE_EN
 #include "netif/bridgeif.h"
@@ -48,6 +48,7 @@ static const struct esp_netif_netstack_config s_wifi_netif_config_sta = {
         }
 };
 
+#if defined(CONFIG_PPP_SUPPORT)
 static const struct esp_netif_netstack_config s_netif_config_ppp = {
         .lwip_ppp = {
                 .input_fn = esp_netif_lwip_ppp_input,
@@ -57,10 +58,9 @@ static const struct esp_netif_netstack_config s_netif_config_ppp = {
                 }
         }
 };
+const esp_netif_netstack_config_t *_g_esp_netif_netstack_default_ppp      = &s_netif_config_ppp;
+#endif // CONFIG_PPP_SUPPORT
 
 const esp_netif_netstack_config_t *_g_esp_netif_netstack_default_eth      = &s_eth_netif_config;
 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

@@ -11,8 +11,6 @@
 #include "lwip/netif.h"
 #include "dhcpserver/dhcpserver.h"
 
-#if defined(CONFIG_ESP_NETIF_TCPIP_LWIP)
-
 struct esp_netif_api_msg_s;
 
 typedef int (*esp_netif_api_fn)(struct esp_netif_api_msg_s *msg);
@@ -108,5 +106,3 @@ struct esp_netif_obj {
     uint8_t max_ports;
 #endif // CONFIG_ESP_NETIF_BRIDGE_EN
 };
-
-#endif /* CONFIG_ESP_NETIF_TCPIP_LWIP */

components/esp_netif/lwip/esp_netif_lwip_ppp.c

@@ -7,8 +7,6 @@
 
 #include "esp_netif.h"
 
-#ifdef CONFIG_ESP_NETIF_TCPIP_LWIP
-
 #include "lwip/dns.h"
 #include "netif/ppp/pppapi.h"
 #include "netif/ppp/pppos.h"
@@ -325,5 +323,3 @@ esp_err_t esp_netif_ppp_get_params(esp_netif_t *netif, esp_netif_ppp_config_t *c
     config->ppp_error_event_enabled = obj->ppp_error_event_enabled;
     return ESP_OK;
 }
-
-#endif /* CONFIG_ESP_NETIF_TCPIP_LWIP */

components/esp_wifi/CMakeLists.txt

@@ -20,12 +20,16 @@ if(CONFIG_ESP32_WIFI_ENABLED)
         "src/coexist.c"
         "src/mesh_event.c"
         "src/smartconfig.c"
-        "src/smartconfig_ack.c"
         "src/wifi_init.c"
         "src/wifi_default.c"
         "src/wifi_netif.c"
         "src/wifi_default_ap.c"
         "${idf_target}/esp_adapter.c")
+
+    if(CONFIG_ESP_NETIF_USES_TCPIP_WITH_BSD_API)
+        list(APPEND srcs
+            "src/smartconfig_ack.c")
+    endif()
 endif()
 
 idf_component_register(SRCS "${srcs}"

components/esp_wifi/src/smartconfig_ack.c

@@ -16,10 +16,8 @@
 #include "esp_wifi.h"
 #include "esp_event.h"
 
-#if CONFIG_ESP_NETIF_TCPIP_LWIP
-
 #include <string.h>
-#include "lwip/sockets.h"
+#include "sys/socket.h"
 #include "esp_smartconfig.h"
 #include "smartconfig_ack.h"
 
@@ -231,5 +229,3 @@ void sc_send_ack_stop(void)
 {
     s_sc_ack_send = false;
 }
-
-#endif

components/mbedtls/port/net_sockets.c

@@ -11,8 +11,6 @@
 
 #include <mbedtls/build_info.h>
 
-#ifdef CONFIG_ESP_NETIF_TCPIP_LWIP
-
 #if !defined(MBEDTLS_NET_C)
 
 #if defined(MBEDTLS_PLATFORM_C)
@@ -427,5 +425,3 @@ void mbedtls_net_free( mbedtls_net_context *ctx )
 }
 
 #endif /* MBEDTLS_NET_C */
-
-#endif /* CONFIG_ESP_NETIF_TCPIP_LWIP */