esp_eth: add support for multiple Ethernets modules at a time

Ethernet driver events properly bounded with ESP NETIF actions to support multiple Ethernet modules used at a time.

Components using Ethernet updated to conform with new API.

Closes espressif/esp-idf#7318


* Original commit: espressif/esp-idf@ef30384

examples/common_components/protocol_examples_common/connect.c

@@ -343,7 +343,7 @@ static void on_eth_event(void *esp_netif, esp_event_base_t event_base,
     switch (event_id) {
     case ETHERNET_EVENT_CONNECTED:
         ESP_LOGI(TAG, "Ethernet Link Up");
-        esp_netif_create_ip6_linklocal(esp_netif);
+        ESP_ERROR_CHECK(esp_netif_create_ip6_linklocal(esp_netif));
         break;
     default:
         break;
@@ -355,7 +355,7 @@ static void on_eth_event(void *esp_netif, esp_event_base_t event_base,
 static esp_eth_handle_t s_eth_handle = NULL;
 static esp_eth_mac_t *s_mac = NULL;
 static esp_eth_phy_t *s_phy = NULL;
-static void *s_eth_glue = NULL;
+static esp_eth_netif_glue_handle_t s_eth_glue = NULL;
 
 static esp_netif_t *eth_start(void)
 {
@@ -373,14 +373,7 @@ static esp_netif_t *eth_start(void)
     esp_netif_t *netif = esp_netif_new(&netif_config);
     assert(netif);
     free(desc);
-    // Set default handlers to process TCP/IP stuffs
-    ESP_ERROR_CHECK(esp_eth_set_default_handlers(netif));
-    // Register user defined event handers
-    ESP_ERROR_CHECK(esp_event_handler_register(IP_EVENT, IP_EVENT_ETH_GOT_IP, &on_got_ip, NULL));
-#ifdef CONFIG_EXAMPLE_CONNECT_IPV6
-    ESP_ERROR_CHECK(esp_event_handler_register(ETH_EVENT, ETHERNET_EVENT_CONNECTED, &on_eth_event, netif));
-    ESP_ERROR_CHECK(esp_event_handler_register(IP_EVENT, IP_EVENT_GOT_IP6, &on_got_ipv6, NULL));
-#endif
+
     eth_mac_config_t mac_config = ETH_MAC_DEFAULT_CONFIG();
     eth_phy_config_t phy_config = ETH_PHY_DEFAULT_CONFIG();
     phy_config.phy_addr = CONFIG_EXAMPLE_ETH_PHY_ADDR;
@@ -460,6 +453,14 @@ static esp_netif_t *eth_start(void)
     // combine driver with netif
     s_eth_glue = esp_eth_new_netif_glue(s_eth_handle);
     esp_netif_attach(netif, s_eth_glue);
+
+    // Register user defined event handers
+    ESP_ERROR_CHECK(esp_event_handler_register(IP_EVENT, IP_EVENT_ETH_GOT_IP, &on_got_ip, NULL));
+#ifdef CONFIG_EXAMPLE_CONNECT_IPV6
+    ESP_ERROR_CHECK(esp_event_handler_register(ETH_EVENT, ETHERNET_EVENT_CONNECTED, &on_eth_event, netif));
+    ESP_ERROR_CHECK(esp_event_handler_register(IP_EVENT, IP_EVENT_GOT_IP6, &on_got_ipv6, NULL));
+#endif
+
     esp_eth_start(s_eth_handle);
     return netif;
 }
@@ -474,7 +475,6 @@ static void eth_stop(void)
 #endif
     ESP_ERROR_CHECK(esp_eth_stop(s_eth_handle));
     ESP_ERROR_CHECK(esp_eth_del_netif_glue(s_eth_glue));
-    ESP_ERROR_CHECK(esp_eth_clear_default_handlers(eth_netif));
     ESP_ERROR_CHECK(esp_eth_driver_uninstall(s_eth_handle));
     ESP_ERROR_CHECK(s_phy->del(s_phy));
     ESP_ERROR_CHECK(s_mac->del(s_mac));