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esp_wifi_drv.c
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esp_wifi_drv.c
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/*
* Copyright (c) 2020 Espressif Systems (Shanghai) Co., Ltd.
*
* SPDX-License-Identifier: Apache-2.0
*/
#define DT_DRV_COMPAT espressif_esp32_wifi
#include <zephyr/logging/log.h>
LOG_MODULE_REGISTER(esp32_wifi, CONFIG_WIFI_LOG_LEVEL);
#include <zephyr/net/ethernet.h>
#include <zephyr/net/net_pkt.h>
#include <zephyr/net/net_if.h>
#include <zephyr/net/wifi_mgmt.h>
#if defined(CONFIG_ESP32_WIFI_AP_STA_MODE)
#include <zephyr/net/wifi_nm.h>
#include <zephyr/net/conn_mgr/connectivity_wifi_mgmt.h>
#endif
#include <zephyr/device.h>
#include <soc.h>
#include "esp_private/wifi.h"
#include "esp_event.h"
#include "esp_timer.h"
#include "esp_system.h"
#include "esp_wpa.h"
#include <esp_mac.h>
#include "wifi/wifi_event.h"
#if CONFIG_SOC_SERIES_ESP32S2 || CONFIG_SOC_SERIES_ESP32C3
#include <esp_private/adc_share_hw_ctrl.h>
#endif /* CONFIG_SOC_SERIES_ESP32S2 || CONFIG_SOC_SERIES_ESP32C3 */
#define DHCPV4_MASK (NET_EVENT_IPV4_DHCP_BOUND | NET_EVENT_IPV4_DHCP_STOP)
/* use global iface pointer to support any ethernet driver */
/* necessary for wifi callback functions */
static struct net_if *esp32_wifi_iface;
static struct esp32_wifi_runtime esp32_data;
#if defined(CONFIG_ESP32_WIFI_AP_STA_MODE)
static struct net_if *esp32_wifi_iface_ap;
static struct esp32_wifi_runtime esp32_ap_sta_data;
#endif
enum esp32_state_flag {
ESP32_STA_STOPPED,
ESP32_STA_STARTED,
ESP32_STA_CONNECTING,
ESP32_STA_CONNECTED,
ESP32_AP_STARTED,
ESP32_AP_CONNECTED,
ESP32_AP_DISCONNECTED,
ESP32_AP_STOPPED,
};
struct esp32_wifi_status {
char ssid[WIFI_SSID_MAX_LEN + 1];
char pass[WIFI_PSK_MAX_LEN + 1];
wifi_auth_mode_t security;
bool connected;
uint8_t channel;
int rssi;
};
struct esp32_wifi_runtime {
uint8_t mac_addr[6];
uint8_t frame_buf[NET_ETH_MAX_FRAME_SIZE];
#if defined(CONFIG_NET_STATISTICS_WIFI)
struct net_stats_wifi stats;
#endif
struct esp32_wifi_status status;
scan_result_cb_t scan_cb;
uint8_t state;
uint8_t ap_connection_cnt;
};
static struct net_mgmt_event_callback esp32_dhcp_cb;
static void wifi_event_handler(struct net_mgmt_event_callback *cb, uint32_t mgmt_event,
struct net_if *iface)
{
switch (mgmt_event) {
case NET_EVENT_IPV4_DHCP_BOUND:
wifi_mgmt_raise_connect_result_event(iface, 0);
break;
default:
break;
}
}
static int esp32_wifi_send(const struct device *dev, struct net_pkt *pkt)
{
struct esp32_wifi_runtime *data = dev->data;
const int pkt_len = net_pkt_get_len(pkt);
esp_interface_t ifx = data->state == ESP32_AP_CONNECTED ? ESP_IF_WIFI_AP : ESP_IF_WIFI_STA;
/* Read the packet payload */
if (net_pkt_read(pkt, data->frame_buf, pkt_len) < 0) {
goto out;
}
/* Enqueue packet for transmission */
if (esp_wifi_internal_tx(ifx, (void *)data->frame_buf, pkt_len) != ESP_OK) {
goto out;
}
#if defined(CONFIG_NET_STATISTICS_WIFI)
data->stats.bytes.sent += pkt_len;
data->stats.pkts.tx++;
#endif
LOG_DBG("pkt sent %p len %d", pkt, pkt_len);
return 0;
out:
LOG_ERR("Failed to send packet");
#if defined(CONFIG_NET_STATISTICS_WIFI)
data->stats.errors.tx++;
#endif
return -EIO;
}
static esp_err_t eth_esp32_rx(void *buffer, uint16_t len, void *eb)
{
struct net_pkt *pkt;
if (esp32_wifi_iface == NULL) {
esp_wifi_internal_free_rx_buffer(eb);
LOG_ERR("network interface unavailable");
return -EIO;
}
pkt = net_pkt_rx_alloc_with_buffer(esp32_wifi_iface, len, AF_UNSPEC, 0, K_MSEC(100));
if (!pkt) {
LOG_ERR("Failed to allocate net buffer");
esp_wifi_internal_free_rx_buffer(eb);
return -EIO;
}
if (net_pkt_write(pkt, buffer, len) < 0) {
LOG_ERR("Failed to write to net buffer");
goto pkt_unref;
}
if (net_recv_data(esp32_wifi_iface, pkt) < 0) {
LOG_ERR("Failed to push received data");
goto pkt_unref;
}
#if defined(CONFIG_NET_STATISTICS_WIFI)
esp32_data.stats.bytes.received += len;
esp32_data.stats.pkts.rx++;
#endif
esp_wifi_internal_free_rx_buffer(eb);
return 0;
pkt_unref:
esp_wifi_internal_free_rx_buffer(eb);
net_pkt_unref(pkt);
#if defined(CONFIG_NET_STATISTICS_WIFI)
esp32_data.stats.errors.rx++;
#endif
return -EIO;
}
#if defined(CONFIG_ESP32_WIFI_AP_STA_MODE)
static esp_err_t wifi_esp32_ap_iface_rx(void *buffer, uint16_t len, void *eb)
{
struct net_pkt *pkt;
if (esp32_wifi_iface_ap == NULL) {
esp_wifi_internal_free_rx_buffer(eb);
LOG_ERR("network interface unavailable");
return -EIO;
}
pkt = net_pkt_rx_alloc_with_buffer(esp32_wifi_iface_ap, len, AF_UNSPEC, 0, K_MSEC(100));
if (!pkt) {
esp_wifi_internal_free_rx_buffer(eb);
LOG_ERR("Failed to get net buffer");
return -EIO;
}
if (net_pkt_write(pkt, buffer, len) < 0) {
LOG_ERR("Failed to write pkt");
goto pkt_unref;
}
if (net_recv_data(esp32_wifi_iface_ap, pkt) < 0) {
LOG_ERR("Failed to push received data");
goto pkt_unref;
}
#if defined(CONFIG_NET_STATISTICS_WIFI)
esp32_ap_sta_data.stats.bytes.received += len;
esp32_ap_sta_data.stats.pkts.rx++;
#endif
esp_wifi_internal_free_rx_buffer(eb);
return 0;
pkt_unref:
esp_wifi_internal_free_rx_buffer(eb);
net_pkt_unref(pkt);
#if defined(CONFIG_NET_STATISTICS_WIFI)
esp32_ap_sta_data.stats.errors.rx++;
#endif
return -EIO;
}
#endif
static void scan_done_handler(void)
{
uint16_t aps = 0;
wifi_ap_record_t *ap_list_buffer;
struct wifi_scan_result res = { 0 };
esp_wifi_scan_get_ap_num(&aps);
if (!aps) {
LOG_INF("No Wi-Fi AP found");
goto out;
}
ap_list_buffer = k_malloc(aps * sizeof(wifi_ap_record_t));
if (ap_list_buffer == NULL) {
LOG_INF("Failed to malloc buffer to print scan results");
goto out;
}
if (esp_wifi_scan_get_ap_records(&aps, (wifi_ap_record_t *)ap_list_buffer) == ESP_OK) {
for (int k = 0; k < aps; k++) {
memset(&res, 0, sizeof(struct wifi_scan_result));
int ssid_len = strnlen(ap_list_buffer[k].ssid, WIFI_SSID_MAX_LEN);
res.ssid_length = ssid_len;
strncpy(res.ssid, ap_list_buffer[k].ssid, ssid_len);
res.rssi = ap_list_buffer[k].rssi;
res.channel = ap_list_buffer[k].primary;
memcpy(res.mac, ap_list_buffer[k].bssid, WIFI_MAC_ADDR_LEN);
res.mac_length = WIFI_MAC_ADDR_LEN;
switch (ap_list_buffer[k].authmode) {
case WIFI_AUTH_OPEN:
res.security = WIFI_SECURITY_TYPE_NONE;
break;
case WIFI_AUTH_WPA2_PSK:
res.security = WIFI_SECURITY_TYPE_PSK;
break;
case WIFI_AUTH_WPA3_PSK:
res.security = WIFI_SECURITY_TYPE_SAE;
break;
case WIFI_AUTH_WAPI_PSK:
res.security = WIFI_SECURITY_TYPE_WAPI;
break;
case WIFI_AUTH_WPA2_ENTERPRISE:
res.security = WIFI_SECURITY_TYPE_EAP;
break;
case WIFI_AUTH_WEP:
res.security = WIFI_SECURITY_TYPE_WEP;
break;
case WIFI_AUTH_WPA_PSK:
res.security = WIFI_SECURITY_TYPE_WPA_PSK;
break;
default:
res.security = WIFI_SECURITY_TYPE_UNKNOWN;
break;
}
if (esp32_data.scan_cb) {
esp32_data.scan_cb(esp32_wifi_iface, 0, &res);
/* ensure notifications get delivered */
k_yield();
}
}
} else {
LOG_INF("Unable to retrieve AP records");
}
k_free(ap_list_buffer);
out:
/* report end of scan event */
esp32_data.scan_cb(esp32_wifi_iface, 0, NULL);
esp32_data.scan_cb = NULL;
}
static void esp_wifi_handle_sta_connect_event(void *event_data)
{
ARG_UNUSED(event_data);
esp32_data.state = ESP32_STA_CONNECTED;
#if defined(CONFIG_ESP32_WIFI_STA_AUTO_DHCPV4)
net_dhcpv4_start(esp32_wifi_iface);
#else
wifi_mgmt_raise_connect_result_event(esp32_wifi_iface, 0);
#endif
}
static void esp_wifi_handle_sta_disconnect_event(void *event_data)
{
wifi_event_sta_disconnected_t *event = (wifi_event_sta_disconnected_t *)event_data;
if (esp32_data.state == ESP32_STA_CONNECTED) {
#if defined(CONFIG_ESP32_WIFI_STA_AUTO_DHCPV4)
net_dhcpv4_stop(esp32_wifi_iface);
#endif
wifi_mgmt_raise_disconnect_result_event(esp32_wifi_iface, 0);
} else {
wifi_mgmt_raise_disconnect_result_event(esp32_wifi_iface, -1);
}
LOG_DBG("Disconnect reason: %d", event->reason);
switch (event->reason) {
case WIFI_REASON_AUTH_EXPIRE:
case WIFI_REASON_4WAY_HANDSHAKE_TIMEOUT:
case WIFI_REASON_AUTH_FAIL:
case WIFI_REASON_HANDSHAKE_TIMEOUT:
case WIFI_REASON_MIC_FAILURE:
LOG_DBG("STA Auth Error");
break;
case WIFI_REASON_NO_AP_FOUND:
LOG_DBG("AP Not found");
break;
default:
break;
}
if (IS_ENABLED(CONFIG_ESP32_WIFI_STA_RECONNECT) &&
(event->reason != WIFI_REASON_ASSOC_LEAVE)) {
esp32_data.state = ESP32_STA_CONNECTING;
esp_wifi_connect();
} else {
esp32_data.state = ESP32_STA_STARTED;
}
}
static void esp_wifi_handle_ap_connect_event(void *event_data)
{
#if defined(CONFIG_ESP32_WIFI_AP_STA_MODE)
struct net_if *iface = esp32_wifi_iface_ap;
wifi_rxcb_t esp32_rx = wifi_esp32_ap_iface_rx;
#else
struct net_if *iface = esp32_wifi_iface;
wifi_rxcb_t esp32_rx = eth_esp32_rx;
#endif
wifi_event_ap_staconnected_t *event = (wifi_event_ap_staconnected_t *)event_data;
LOG_DBG("Station " MACSTR " join, AID=%d", MAC2STR(event->mac), event->aid);
struct wifi_ap_sta_info sta_info;
sta_info.mac_length = WIFI_MAC_ADDR_LEN;
memcpy(sta_info.mac, event->mac, WIFI_MAC_ADDR_LEN);
wifi_mgmt_raise_ap_sta_connected_event(iface, &sta_info);
if (!(esp32_data.ap_connection_cnt++)) {
esp_wifi_internal_reg_rxcb(WIFI_IF_AP, esp32_rx);
}
}
static void esp_wifi_handle_ap_disconnect_event(void *event_data)
{
#if defined(CONFIG_ESP32_WIFI_AP_STA_MODE)
struct net_if *iface = esp32_wifi_iface_ap;
#else
struct net_if *iface = esp32_wifi_iface;
#endif
wifi_event_ap_stadisconnected_t *event = (wifi_event_ap_stadisconnected_t *)event_data;
LOG_DBG("station " MACSTR " leave, AID=%d", MAC2STR(event->mac), event->aid);
struct wifi_ap_sta_info sta_info;
sta_info.mac_length = WIFI_MAC_ADDR_LEN;
memcpy(sta_info.mac, event->mac, WIFI_MAC_ADDR_LEN);
wifi_mgmt_raise_ap_sta_disconnected_event(iface, &sta_info);
if (!(--esp32_data.ap_connection_cnt)) {
esp_wifi_internal_reg_rxcb(WIFI_IF_AP, NULL);
}
}
void esp_wifi_event_handler(const char *event_base, int32_t event_id, void *event_data,
size_t event_data_size, uint32_t ticks_to_wait)
{
#if defined(CONFIG_ESP32_WIFI_AP_STA_MODE)
struct net_if *iface_ap = esp32_wifi_iface_ap;
struct esp32_wifi_runtime *ap_data = &esp32_ap_sta_data;
#else
struct net_if *iface_ap = esp32_wifi_iface;
struct esp32_wifi_runtime *ap_data = &esp32_data;
#endif
LOG_DBG("Wi-Fi event: %d", event_id);
switch (event_id) {
case WIFI_EVENT_STA_START:
esp32_data.state = ESP32_STA_STARTED;
net_eth_carrier_on(esp32_wifi_iface);
break;
case WIFI_EVENT_STA_STOP:
esp32_data.state = ESP32_STA_STOPPED;
net_eth_carrier_off(esp32_wifi_iface);
break;
case WIFI_EVENT_STA_CONNECTED:
esp_wifi_handle_sta_connect_event(event_data);
break;
case WIFI_EVENT_STA_DISCONNECTED:
esp_wifi_handle_sta_disconnect_event(event_data);
break;
case WIFI_EVENT_SCAN_DONE:
scan_done_handler();
break;
case WIFI_EVENT_AP_START:
ap_data->state = ESP32_AP_STARTED;
net_eth_carrier_on(iface_ap);
wifi_mgmt_raise_ap_enable_result_event(iface_ap, 0);
break;
case WIFI_EVENT_AP_STOP:
ap_data->state = ESP32_AP_STOPPED;
net_eth_carrier_off(iface_ap);
wifi_mgmt_raise_ap_disable_result_event(iface_ap, 0);
break;
case WIFI_EVENT_AP_STACONNECTED:
ap_data->state = ESP32_AP_CONNECTED;
esp_wifi_handle_ap_connect_event(event_data);
break;
case WIFI_EVENT_AP_STADISCONNECTED:
ap_data->state = ESP32_AP_DISCONNECTED;
esp_wifi_handle_ap_disconnect_event(event_data);
break;
default:
break;
}
}
static int esp32_wifi_disconnect(const struct device *dev)
{
int ret = esp_wifi_disconnect();
if (ret != ESP_OK) {
LOG_INF("Failed to disconnect from hotspot");
return -EAGAIN;
}
return 0;
}
static int esp32_wifi_connect(const struct device *dev,
struct wifi_connect_req_params *params)
{
struct esp32_wifi_runtime *data = dev->data;
struct net_if *iface = net_if_lookup_by_dev(dev);
wifi_mode_t mode;
int ret;
if (data->state == ESP32_STA_CONNECTING || data->state == ESP32_STA_CONNECTED) {
wifi_mgmt_raise_connect_result_event(iface, -1);
return -EALREADY;
}
ret = esp_wifi_get_mode(&mode);
if (ret) {
LOG_ERR("Failed to get Wi-Fi mode (%d)", ret);
return -EAGAIN;
}
if (IS_ENABLED(CONFIG_ESP32_WIFI_AP_STA_MODE) &&
(mode == ESP32_WIFI_MODE_AP || mode == ESP32_WIFI_MODE_APSTA)) {
ret = esp_wifi_set_mode(ESP32_WIFI_MODE_APSTA);
} else {
ret = esp_wifi_set_mode(ESP32_WIFI_MODE_STA);
}
if (ret) {
LOG_ERR("Failed to set Wi-Fi mode (%d)", ret);
return -EAGAIN;
}
ret = esp_wifi_start();
if (ret) {
LOG_ERR("Failed to start Wi-Fi driver (%d)", ret);
return -EAGAIN;
}
if (data->state != ESP32_STA_STARTED) {
LOG_ERR("Wi-Fi not in station mode");
wifi_mgmt_raise_connect_result_event(iface, -1);
return -EIO;
}
data->state = ESP32_STA_CONNECTING;
memcpy(data->status.ssid, params->ssid, params->ssid_length);
data->status.ssid[params->ssid_length] = '\0';
wifi_config_t wifi_config;
memset(&wifi_config, 0, sizeof(wifi_config_t));
memcpy(wifi_config.sta.ssid, params->ssid, params->ssid_length);
wifi_config.sta.ssid[params->ssid_length] = '\0';
switch (params->security) {
case WIFI_SECURITY_TYPE_NONE:
wifi_config.sta.threshold.authmode = WIFI_AUTH_OPEN;
data->status.security = WIFI_AUTH_OPEN;
wifi_config.sta.pmf_cfg.required = false;
break;
case WIFI_SECURITY_TYPE_PSK:
memcpy(wifi_config.sta.password, params->psk, params->psk_length);
wifi_config.sta.password[params->psk_length] = '\0';
wifi_config.sta.threshold.authmode = WIFI_AUTH_WPA2_PSK;
wifi_config.sta.pmf_cfg.required = false;
data->status.security = WIFI_AUTH_WPA2_PSK;
break;
case WIFI_SECURITY_TYPE_SAE:
#if defined(CONFIG_ESP32_WIFI_ENABLE_WPA3_SAE)
if (params->sae_password) {
memcpy(wifi_config.sta.password, params->sae_password,
params->sae_password_length);
wifi_config.sta.password[params->sae_password_length] = '\0';
} else {
memcpy(wifi_config.sta.password, params->psk, params->psk_length);
wifi_config.sta.password[params->psk_length] = '\0';
}
data->status.security = WIFI_AUTH_WPA3_PSK;
wifi_config.sta.threshold.authmode = WIFI_AUTH_WPA3_PSK;
wifi_config.sta.sae_pwe_h2e = WPA3_SAE_PWE_BOTH;
break;
#else
LOG_ERR("WPA3 not supported for STA mode. Enable "
"CONFIG_ESP32_WIFI_ENABLE_WPA3_SAE");
return -EINVAL;
#endif /* CONFIG_ESP32_WIFI_ENABLE_WPA3_SAE */
default:
LOG_ERR("Authentication method not supported");
return -EIO;
}
if (params->channel == WIFI_CHANNEL_ANY) {
wifi_config.sta.channel = 0U;
data->status.channel = 0U;
} else {
wifi_config.sta.channel = params->channel;
data->status.channel = params->channel;
}
ret = esp_wifi_set_config(ESP_IF_WIFI_STA, &wifi_config);
if (ret) {
LOG_ERR("Failed to set Wi-Fi configuration (%d)", ret);
return -EINVAL;
}
ret = esp_wifi_connect();
if (ret) {
LOG_ERR("Failed to connect to Wi-Fi access point (%d)", ret);
return -EAGAIN;
}
return 0;
}
static int esp32_wifi_scan(const struct device *dev, struct wifi_scan_params *params,
scan_result_cb_t cb)
{
struct esp32_wifi_runtime *data = dev->data;
int ret = 0;
if (data->scan_cb != NULL) {
LOG_INF("Scan callback in progress");
return -EINPROGRESS;
}
data->scan_cb = cb;
wifi_scan_config_t scan_config = { 0 };
if (params) {
/* The enum values are same, so, no conversion needed */
scan_config.scan_type = params->scan_type;
}
#if defined(CONFIG_ESP32_WIFI_AP_STA_MODE)
wifi_mode_t mode;
esp_wifi_get_mode(&mode);
if (mode == ESP32_WIFI_MODE_AP || mode == ESP32_WIFI_MODE_APSTA) {
ret = esp_wifi_set_mode(ESP32_WIFI_MODE_APSTA);
} else {
ret = esp_wifi_set_mode(ESP32_WIFI_MODE_STA);
}
#else
ret = esp_wifi_set_mode(ESP32_WIFI_MODE_STA);
#endif
if (ret) {
LOG_ERR("Failed to set Wi-Fi mode (%d)", ret);
return -EINVAL;
}
ret = esp_wifi_start();
if (ret) {
LOG_ERR("Failed to start Wi-Fi driver (%d)", ret);
return -EAGAIN;
}
ret = esp_wifi_scan_start(&scan_config, false);
if (ret != ESP_OK) {
LOG_ERR("Failed to start Wi-Fi scanning");
return -EAGAIN;
}
return 0;
};
static int esp32_wifi_ap_enable(const struct device *dev,
struct wifi_connect_req_params *params)
{
struct esp32_wifi_runtime *data = dev->data;
esp_err_t err = 0;
/* Build Wi-Fi configuration for AP mode */
wifi_config_t wifi_config = {
.ap = {
.max_connection = 5,
.channel = params->channel == WIFI_CHANNEL_ANY ?
0 : params->channel,
},
};
memcpy(data->status.ssid, params->ssid, params->ssid_length);
data->status.ssid[params->ssid_length] = '\0';
strncpy((char *) wifi_config.ap.ssid, params->ssid, params->ssid_length);
wifi_config.ap.ssid_len = params->ssid_length;
switch (params->security) {
case WIFI_SECURITY_TYPE_NONE:
memset(wifi_config.ap.password, 0, sizeof(wifi_config.ap.password));
wifi_config.ap.authmode = WIFI_AUTH_OPEN;
data->status.security = WIFI_AUTH_OPEN;
wifi_config.ap.pmf_cfg.required = false;
break;
case WIFI_SECURITY_TYPE_PSK:
strncpy((char *) wifi_config.ap.password, params->psk, params->psk_length);
wifi_config.ap.authmode = WIFI_AUTH_WPA2_PSK;
data->status.security = WIFI_AUTH_WPA2_PSK;
wifi_config.ap.pmf_cfg.required = false;
break;
default:
LOG_ERR("Authentication method not supported");
return -EINVAL;
}
/* Start Wi-Fi in AP mode with configuration built above */
wifi_mode_t mode;
err = esp_wifi_get_mode(&mode);
if (IS_ENABLED(CONFIG_ESP32_WIFI_AP_STA_MODE) &&
(mode == ESP32_WIFI_MODE_STA || mode == ESP32_WIFI_MODE_APSTA)) {
err |= esp_wifi_set_mode(ESP32_WIFI_MODE_APSTA);
} else {
err |= esp_wifi_set_mode(ESP32_WIFI_MODE_AP);
}
if (err) {
LOG_ERR("Failed to set Wi-Fi mode (%d)", err);
return -EINVAL;
}
err = esp_wifi_set_config(WIFI_IF_AP, &wifi_config);
if (err) {
LOG_ERR("Failed to set Wi-Fi configuration (%d)", err);
return -EINVAL;
}
err = esp_wifi_start();
if (err) {
LOG_ERR("Failed to enable Wi-Fi AP mode");
return -EAGAIN;
}
return 0;
};
static int esp32_wifi_ap_disable(const struct device *dev)
{
int err = 0;
wifi_mode_t mode;
esp_wifi_get_mode(&mode);
if (mode == ESP32_WIFI_MODE_APSTA) {
err = esp_wifi_set_mode(ESP32_WIFI_MODE_STA);
err |= esp_wifi_start();
} else {
err = esp_wifi_stop();
}
if (err) {
LOG_ERR("Failed to disable Wi-Fi AP mode: (%d)", err);
return -EAGAIN;
}
return 0;
};
static int esp32_wifi_status(const struct device *dev, struct wifi_iface_status *status)
{
struct esp32_wifi_runtime *data = dev->data;
wifi_mode_t mode;
wifi_config_t conf;
wifi_ap_record_t ap_info;
switch (data->state) {
case ESP32_STA_STOPPED:
case ESP32_AP_STOPPED:
status->state = WIFI_STATE_INACTIVE;
break;
case ESP32_STA_STARTED:
case ESP32_AP_DISCONNECTED:
status->state = WIFI_STATE_DISCONNECTED;
break;
case ESP32_STA_CONNECTING:
status->state = WIFI_STATE_SCANNING;
break;
case ESP32_STA_CONNECTED:
case ESP32_AP_CONNECTED:
status->state = WIFI_STATE_COMPLETED;
break;
default:
break;
}
strncpy(status->ssid, data->status.ssid, WIFI_SSID_MAX_LEN);
status->ssid_len = strnlen(data->status.ssid, WIFI_SSID_MAX_LEN);
status->band = WIFI_FREQ_BAND_2_4_GHZ;
status->link_mode = WIFI_LINK_MODE_UNKNOWN;
status->mfp = WIFI_MFP_DISABLE;
if (esp_wifi_get_mode(&mode) == ESP_OK) {
if (mode == ESP32_WIFI_MODE_STA) {
wifi_phy_mode_t phy_mode;
esp_err_t err;
esp_wifi_get_config(ESP_IF_WIFI_STA, &conf);
esp_wifi_sta_get_ap_info(&ap_info);
status->iface_mode = WIFI_MODE_INFRA;
status->channel = ap_info.primary;
status->rssi = ap_info.rssi;
memcpy(status->bssid, ap_info.bssid, WIFI_MAC_ADDR_LEN);
err = esp_wifi_sta_get_negotiated_phymode(&phy_mode);
if (err == ESP_OK) {
if (phy_mode == WIFI_PHY_MODE_11B) {
status->link_mode = WIFI_1;
} else if (phy_mode == WIFI_PHY_MODE_11G) {
status->link_mode = WIFI_3;
} else if ((phy_mode == WIFI_PHY_MODE_HT20) ||
(phy_mode == WIFI_PHY_MODE_HT40)) {
status->link_mode = WIFI_4;
} else if (phy_mode == WIFI_PHY_MODE_HE20) {
status->link_mode = WIFI_6;
}
}
status->beacon_interval = conf.sta.listen_interval;
} else if (mode == ESP32_WIFI_MODE_AP) {
esp_wifi_get_config(ESP_IF_WIFI_AP, &conf);
status->iface_mode = WIFI_MODE_AP;
status->link_mode = WIFI_LINK_MODE_UNKNOWN;
status->channel = conf.ap.channel;
status->beacon_interval = conf.ap.beacon_interval;
} else {
status->iface_mode = WIFI_MODE_UNKNOWN;
status->link_mode = WIFI_LINK_MODE_UNKNOWN;
status->channel = 0;
}
}
switch (data->status.security) {
case WIFI_AUTH_OPEN:
status->security = WIFI_SECURITY_TYPE_NONE;
break;
case WIFI_AUTH_WPA2_PSK:
status->security = WIFI_SECURITY_TYPE_PSK;
break;
case WIFI_AUTH_WPA3_PSK:
status->security = WIFI_SECURITY_TYPE_SAE;
break;
default:
status->security = WIFI_SECURITY_TYPE_UNKNOWN;
}
return 0;
}
static void esp32_wifi_init(struct net_if *iface)
{
const struct device *dev = net_if_get_device(iface);
struct esp32_wifi_runtime *dev_data = dev->data;
struct ethernet_context *eth_ctx = net_if_l2_data(iface);
eth_ctx->eth_if_type = L2_ETH_IF_TYPE_WIFI;
#if defined(CONFIG_ESP32_WIFI_AP_STA_MODE)
struct wifi_nm_instance *nm = wifi_nm_get_instance("esp32_wifi_nm");
if (!esp32_wifi_iface_ap) {
esp32_wifi_iface_ap = iface;
dev_data->state = ESP32_AP_STOPPED;
esp_read_mac(dev_data->mac_addr, ESP_MAC_WIFI_SOFTAP);
wifi_nm_register_mgd_type_iface(nm, WIFI_TYPE_SAP, esp32_wifi_iface_ap);
} else {
esp32_wifi_iface = iface;
dev_data->state = ESP32_STA_STOPPED;
/* Start interface when we are actually connected with Wi-Fi network */
esp_read_mac(dev_data->mac_addr, ESP_MAC_WIFI_STA);
esp_wifi_internal_reg_rxcb(ESP_IF_WIFI_STA, eth_esp32_rx);
wifi_nm_register_mgd_type_iface(nm, WIFI_TYPE_STA, esp32_wifi_iface);
}
#else
esp32_wifi_iface = iface;
dev_data->state = ESP32_STA_STOPPED;
/* Start interface when we are actually connected with Wi-Fi network */
esp_read_mac(dev_data->mac_addr, ESP_MAC_WIFI_STA);
esp_wifi_internal_reg_rxcb(ESP_IF_WIFI_STA, eth_esp32_rx);
#endif
/* Assign link local address. */
net_if_set_link_addr(iface, dev_data->mac_addr, 6, NET_LINK_ETHERNET);
ethernet_init(iface);
net_if_carrier_off(iface);
}
#if defined(CONFIG_NET_STATISTICS_WIFI)
static int esp32_wifi_stats(const struct device *dev, struct net_stats_wifi *stats)
{
struct esp32_wifi_runtime *data = dev->data;
stats->bytes.received = data->stats.bytes.received;
stats->bytes.sent = data->stats.bytes.sent;
stats->pkts.rx = data->stats.pkts.rx;
stats->pkts.tx = data->stats.pkts.tx;
stats->errors.rx = data->stats.errors.rx;
stats->errors.tx = data->stats.errors.tx;
stats->broadcast.rx = data->stats.broadcast.rx;
stats->broadcast.tx = data->stats.broadcast.tx;
stats->multicast.rx = data->stats.multicast.rx;
stats->multicast.tx = data->stats.multicast.tx;
stats->sta_mgmt.beacons_rx = data->stats.sta_mgmt.beacons_rx;
stats->sta_mgmt.beacons_miss = data->stats.sta_mgmt.beacons_miss;
return 0;
}
#endif
static int esp32_wifi_dev_init(const struct device *dev)
{
#if CONFIG_SOC_SERIES_ESP32S2 || CONFIG_SOC_SERIES_ESP32C3
adc2_init_code_calibration();
#endif /* CONFIG_SOC_SERIES_ESP32S2 || CONFIG_SOC_SERIES_ESP32C3 */
esp_timer_init();
wifi_init_config_t config = WIFI_INIT_CONFIG_DEFAULT();
esp_err_t ret = esp_wifi_init(&config);
if (ret == ESP_ERR_NO_MEM) {
LOG_ERR("Not enough memory to initialize Wi-Fi.");
LOG_ERR("Consider increasing CONFIG_HEAP_MEM_POOL_SIZE value.");
return -ENOMEM;
} else if (ret != ESP_OK) {
LOG_ERR("Unable to initialize the Wi-Fi: %d", ret);
return -EIO;
}
if (IS_ENABLED(CONFIG_ESP32_WIFI_STA_AUTO_DHCPV4)) {
net_mgmt_init_event_callback(&esp32_dhcp_cb, wifi_event_handler, DHCPV4_MASK);
net_mgmt_add_event_callback(&esp32_dhcp_cb);
}
return 0;
}
static const struct wifi_mgmt_ops esp32_wifi_mgmt = {
.scan = esp32_wifi_scan,
.connect = esp32_wifi_connect,
.disconnect = esp32_wifi_disconnect,
.ap_enable = esp32_wifi_ap_enable,
.ap_disable = esp32_wifi_ap_disable,
.iface_status = esp32_wifi_status,
#if defined(CONFIG_NET_STATISTICS_WIFI)
.get_stats = esp32_wifi_stats,
#endif
};
static const struct net_wifi_mgmt_offload esp32_api = {
.wifi_iface.iface_api.init = esp32_wifi_init,
.wifi_iface.send = esp32_wifi_send,
.wifi_mgmt_api = &esp32_wifi_mgmt,
};
NET_DEVICE_DT_INST_DEFINE(0,
esp32_wifi_dev_init, NULL,
&esp32_data, NULL, CONFIG_WIFI_INIT_PRIORITY,
&esp32_api, ETHERNET_L2,
NET_L2_GET_CTX_TYPE(ETHERNET_L2), NET_ETH_MTU);
#if defined(CONFIG_ESP32_WIFI_AP_STA_MODE)
NET_DEVICE_DT_INST_DEFINE(1,
NULL, NULL,
&esp32_ap_sta_data, NULL, CONFIG_WIFI_INIT_PRIORITY,
&esp32_api, ETHERNET_L2,
NET_L2_GET_CTX_TYPE(ETHERNET_L2), NET_ETH_MTU);
DEFINE_WIFI_NM_INSTANCE(esp32_wifi_nm, &esp32_wifi_mgmt);
CONNECTIVITY_WIFI_MGMT_BIND(Z_DEVICE_DT_DEV_ID(DT_DRV_INST(0)));
#endif