240 lines
8.3 KiB
C
240 lines
8.3 KiB
C
/* eth2ap (Ethernet to Wi-Fi AP packet forwarding) Example
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This example code is in the Public Domain (or CC0 licensed, at your option.)
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Unless required by applicable law or agreed to in writing, this
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software is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
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CONDITIONS OF ANY KIND, either express or implied.
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*/
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#include <string.h>
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#include <stdlib.h>
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#include "freertos/FreeRTOS.h"
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#include "freertos/task.h"
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#include "freertos/queue.h"
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#include "esp_event.h"
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#include "esp_log.h"
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#include "esp_eth.h"
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#include "esp_wifi.h"
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#include "nvs_flash.h"
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#include "esp_private/wifi.h"
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#include "driver/gpio.h"
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#include "sdkconfig.h"
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static const char *TAG = "eth_example";
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static esp_eth_handle_t s_eth_handle = NULL;
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static xQueueHandle flow_control_queue = NULL;
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static bool s_sta_is_connected = false;
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static bool s_ethernet_is_connected = false;
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static uint8_t s_eth_mac[6];
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#define FLOW_CONTROL_QUEUE_TIMEOUT_MS (100)
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#define FLOW_CONTROL_QUEUE_LENGTH (40)
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#define FLOW_CONTROL_WIFI_SEND_TIMEOUT_MS (100)
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typedef struct {
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void *packet;
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uint16_t length;
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} flow_control_msg_t;
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// Forward packets from Wi-Fi to Ethernet
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static esp_err_t pkt_wifi2eth(void *buffer, uint16_t len, void *eb)
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{
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if (s_ethernet_is_connected) {
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if (esp_eth_transmit(s_eth_handle, buffer, len) != ESP_OK) {
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ESP_LOGE(TAG, "Ethernet send packet failed");
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}
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}
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esp_wifi_internal_free_rx_buffer(eb);
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return ESP_OK;
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}
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// Forward packets from Ethernet to Wi-Fi
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// Note that, Ethernet works faster than Wi-Fi on ESP32,
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// so we need to add an extra queue to balance their speed difference.
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static esp_err_t pkt_eth2wifi(esp_eth_handle_t eth_handle, uint8_t *buffer, uint32_t len)
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{
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esp_err_t ret = ESP_OK;
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flow_control_msg_t msg = {
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.packet = buffer,
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.length = len
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};
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if (xQueueSend(flow_control_queue, &msg, pdMS_TO_TICKS(FLOW_CONTROL_QUEUE_TIMEOUT_MS)) != pdTRUE) {
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ESP_LOGE(TAG, "send flow control message failed or timeout");
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free(buffer);
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ret = ESP_FAIL;
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}
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return ret;
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}
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// This task will fetch the packet from the queue, and then send out through Wi-Fi.
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// Wi-Fi handles packets slower than Ethernet, we might add some delay between each transmitting.
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static void eth2wifi_flow_control_task(void *args)
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{
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flow_control_msg_t msg;
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int res = 0;
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uint32_t timeout = 0;
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while (1) {
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if (xQueueReceive(flow_control_queue, &msg, pdMS_TO_TICKS(FLOW_CONTROL_QUEUE_TIMEOUT_MS)) == pdTRUE) {
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timeout = 0;
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if (s_sta_is_connected && msg.length) {
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do {
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vTaskDelay(pdMS_TO_TICKS(timeout));
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timeout += 2;
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res = esp_wifi_internal_tx(ESP_IF_WIFI_AP, msg.packet, msg.length);
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} while (res && timeout < FLOW_CONTROL_WIFI_SEND_TIMEOUT_MS);
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if (res != ESP_OK) {
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ESP_LOGE(TAG, "WiFi send packet failed: %d", res);
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}
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}
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free(msg.packet);
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}
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}
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vTaskDelete(NULL);
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}
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// Event handler for Ethernet
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static void eth_event_handler(void *arg, esp_event_base_t event_base,
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int32_t event_id, void *event_data)
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{
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switch (event_id) {
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case ETHERNET_EVENT_CONNECTED:
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ESP_LOGI(TAG, "Ethernet Link Up");
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s_ethernet_is_connected = true;
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esp_eth_ioctl(s_eth_handle, ETH_CMD_G_MAC_ADDR, s_eth_mac);
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esp_wifi_set_mac(WIFI_IF_AP, s_eth_mac);
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ESP_ERROR_CHECK(esp_wifi_start());
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break;
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case ETHERNET_EVENT_DISCONNECTED:
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ESP_LOGI(TAG, "Ethernet Link Down");
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s_ethernet_is_connected = false;
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ESP_ERROR_CHECK(esp_wifi_stop());
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break;
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case ETHERNET_EVENT_START:
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ESP_LOGI(TAG, "Ethernet Started");
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break;
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case ETHERNET_EVENT_STOP:
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ESP_LOGI(TAG, "Ethernet Stopped");
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break;
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default:
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break;
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}
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}
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// Event handler for Wi-Fi
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static void wifi_event_handler(void *arg, esp_event_base_t event_base,
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int32_t event_id, void *event_data)
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{
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switch (event_id) {
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case WIFI_EVENT_AP_STACONNECTED:
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ESP_LOGI(TAG, "Wi-Fi AP got a station connected");
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s_sta_is_connected = true;
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esp_wifi_internal_reg_rxcb(ESP_IF_WIFI_AP, pkt_wifi2eth);
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break;
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case WIFI_EVENT_AP_STADISCONNECTED:
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ESP_LOGI(TAG, "Wi-Fi AP got a station disconnected");
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s_sta_is_connected = false;
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esp_wifi_internal_reg_rxcb(ESP_IF_WIFI_AP, NULL);
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break;
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default:
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break;
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}
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}
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static void initialize_ethernet(void)
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{
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ESP_ERROR_CHECK(esp_event_handler_register(ETH_EVENT, ESP_EVENT_ANY_ID, eth_event_handler, NULL));
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eth_mac_config_t mac_config = ETH_MAC_DEFAULT_CONFIG();
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eth_phy_config_t phy_config = ETH_PHY_DEFAULT_CONFIG();
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#if CONFIG_EXAMPLE_USE_INTERNAL_ETHERNET
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esp_eth_mac_t *mac = esp_eth_mac_new_esp32(&mac_config);
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#if CONFIG_EXAMPLE_ETH_PHY_IP101
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esp_eth_phy_t *phy = esp_eth_phy_new_ip101(&phy_config);
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#elif CONFIG_EXAMPLE_ETH_PHY_RTL8201
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esp_eth_phy_t *phy = esp_eth_phy_new_rtl8201(&phy_config);
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#elif CONFIG_EXAMPLE_ETH_PHY_LAN8720
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esp_eth_phy_t *phy = esp_eth_phy_new_lan8720(&phy_config);
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#elif CONFIG_EXAMPLE_ETH_PHY_DP83848
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esp_eth_phy_t *phy = esp_eth_phy_new_dp83848(&phy_config);
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#endif
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#elif CONFIG_EXAMPLE_USE_SPI_ETHERNET
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gpio_install_isr_service(0);
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spi_device_handle_t spi_handle = NULL;
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spi_bus_config_t buscfg = {
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.miso_io_num = CONFIG_EXAMPLE_ETH_MISO_GPIO,
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.mosi_io_num = CONFIG_EXAMPLE_ETH_MOSI_GPIO,
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.sclk_io_num = CONFIG_EXAMPLE_ETH_SCLK_GPIO,
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.quadwp_io_num = -1,
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.quadhd_io_num = -1,
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};
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ESP_ERROR_CHECK(spi_bus_initialize(CONFIG_EXAMPLE_ETH_SPI_HOST, &buscfg, 1));
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spi_device_interface_config_t devcfg = {
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.command_bits = 1,
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.address_bits = 7,
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.mode = 0,
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.clock_speed_hz = CONFIG_EXAMPLE_ETH_SPI_CLOCK_MHZ * 1000 * 1000,
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.spics_io_num = CONFIG_EXAMPLE_ETH_CS_GPIO,
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.queue_size = 20
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};
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ESP_ERROR_CHECK(spi_bus_add_device(CONFIG_EXAMPLE_ETH_SPI_HOST, &devcfg, &spi_handle));
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/* dm9051 ethernet driver is based on spi driver */
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eth_dm9051_config_t dm9051_config = ETH_DM9051_DEFAULT_CONFIG(spi_handle);
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esp_eth_mac_t *mac = esp_eth_mac_new_dm9051(&dm9051_config, &mac_config);
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esp_eth_phy_t *phy = esp_eth_phy_new_dm9051(&phy_config);
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#endif
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esp_eth_config_t config = ETH_DEFAULT_CONFIG(mac, phy);
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config.stack_input = pkt_eth2wifi;
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ESP_ERROR_CHECK(esp_eth_driver_install(&config, &s_eth_handle));
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esp_eth_ioctl(s_eth_handle, ETH_CMD_S_PROMISCUOUS, (void *)true);
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}
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static void initialize_wifi(void)
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{
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ESP_ERROR_CHECK(esp_event_handler_register(WIFI_EVENT, ESP_EVENT_ANY_ID, wifi_event_handler, NULL));
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wifi_init_config_t cfg = WIFI_INIT_CONFIG_DEFAULT();
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ESP_ERROR_CHECK(esp_wifi_init(&cfg));
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ESP_ERROR_CHECK(esp_wifi_set_storage(WIFI_STORAGE_RAM));
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wifi_config_t wifi_config = {
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.ap = {
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.ssid = CONFIG_EXAMPLE_WIFI_SSID,
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.ssid_len = strlen(CONFIG_EXAMPLE_WIFI_SSID),
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.password = CONFIG_EXAMPLE_WIFI_PASSWORD,
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.max_connection = CONFIG_EXAMPLE_MAX_STA_CONN,
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.authmode = WIFI_AUTH_WPA_WPA2_PSK
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},
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};
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if (strlen(CONFIG_EXAMPLE_WIFI_PASSWORD) == 0) {
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wifi_config.ap.authmode = WIFI_AUTH_OPEN;
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}
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ESP_ERROR_CHECK(esp_wifi_set_mode(WIFI_MODE_AP));
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ESP_ERROR_CHECK(esp_wifi_set_config(ESP_IF_WIFI_AP, &wifi_config));
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}
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static esp_err_t initialize_flow_control(void)
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{
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flow_control_queue = xQueueCreate(FLOW_CONTROL_QUEUE_LENGTH, sizeof(flow_control_msg_t));
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if (!flow_control_queue) {
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ESP_LOGE(TAG, "create flow control queue failed");
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return ESP_FAIL;
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}
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BaseType_t ret = xTaskCreate(eth2wifi_flow_control_task, "flow_ctl", 2048, NULL, (tskIDLE_PRIORITY + 2), NULL);
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if (ret != pdTRUE) {
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ESP_LOGE(TAG, "create flow control task failed");
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return ESP_FAIL;
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}
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return ESP_OK;
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}
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void app_main(void)
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{
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esp_err_t ret = nvs_flash_init();
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if (ret == ESP_ERR_NVS_NO_FREE_PAGES || ret == ESP_ERR_NVS_NEW_VERSION_FOUND) {
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ESP_ERROR_CHECK(nvs_flash_erase());
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ret = nvs_flash_init();
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}
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ESP_ERROR_CHECK(ret);
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ESP_ERROR_CHECK(esp_event_loop_create_default());
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ESP_ERROR_CHECK(initialize_flow_control());
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initialize_ethernet();
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initialize_wifi();
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}
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