wifi_component_esp_idf.cpp

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#include "wifi_component.h"
 
#ifdef USE_WIFI
#ifdef USE_ESP32
 
#include <esp_event.h>
#include <esp_netif.h>
#include <esp_system.h>
#include <esp_wifi.h>
#include <esp_wifi_types.h>
#include <freertos/FreeRTOS.h>
#include <freertos/event_groups.h>
#include <freertos/task.h>
 
#include <algorithm>
#include <cinttypes>
#include <memory>
#include <utility>
#ifdef USE_WIFI_WPA2_EAP
#if ESP_IDF_VERSION >= ESP_IDF_VERSION_VAL(5, 1, 0)
#include <esp_eap_client.h>
#else
#include <esp_wpa2.h>
#endif
#endif
 
#ifdef USE_WIFI_AP
#include "dhcpserver/dhcpserver.h"
#endif  // USE_WIFI_AP
 
#ifdef USE_CAPTIVE_PORTAL
#include "esphome/components/captive_portal/captive_portal.h"
#endif
 
#include "lwip/apps/sntp.h"
#include "lwip/dns.h"
#include "lwip/err.h"
 
#include "esphome/core/application.h"
#include "esphome/core/hal.h"
#include "esphome/core/helpers.h"
#include "esphome/core/log.h"
#include "esphome/core/util.h"
 
namespace esphome::wifi {
 
static const char *const TAG = "wifi_esp32";
 
static EventGroupHandle_t s_wifi_event_group;  // NOLINT(cppcoreguidelines-avoid-non-const-global-variables)
static esp_netif_t *s_sta_netif = nullptr;     // NOLINT(cppcoreguidelines-avoid-non-const-global-variables)
#ifdef USE_WIFI_AP
static esp_netif_t *s_ap_netif = nullptr;     // NOLINT(cppcoreguidelines-avoid-non-const-global-variables)
#endif                                        // USE_WIFI_AP
static bool s_sta_started = false;            // NOLINT(cppcoreguidelines-avoid-non-const-global-variables)
static bool s_sta_connected = false;          // NOLINT(cppcoreguidelines-avoid-non-const-global-variables)
static bool s_sta_connect_not_found = false;  // NOLINT(cppcoreguidelines-avoid-non-const-global-variables)
static bool s_sta_connect_error = false;      // NOLINT(cppcoreguidelines-avoid-non-const-global-variables)
static bool s_sta_connecting = false;         // NOLINT(cppcoreguidelines-avoid-non-const-global-variables)
static bool s_wifi_started = false;           // NOLINT(cppcoreguidelines-avoid-non-const-global-variables)
 
struct IDFWiFiEvent {
  esp_event_base_t event_base;
  int32_t event_id;
  union {
    wifi_event_sta_scan_done_t sta_scan_done;
    wifi_event_sta_connected_t sta_connected;
    wifi_event_sta_disconnected_t sta_disconnected;
    wifi_event_sta_authmode_change_t sta_authmode_change;
    wifi_event_ap_staconnected_t ap_staconnected;
    wifi_event_ap_stadisconnected_t ap_stadisconnected;
    wifi_event_ap_probe_req_rx_t ap_probe_req_rx;
    wifi_event_bss_rssi_low_t bss_rssi_low;
    ip_event_got_ip_t ip_got_ip;
#if USE_NETWORK_IPV6
    ip_event_got_ip6_t ip_got_ip6;
#endif /* USE_NETWORK_IPV6 */
#if ESP_IDF_VERSION >= ESP_IDF_VERSION_VAL(6, 0, 0)
    ip_event_assigned_ip_to_client_t ip_assigned_ip_to_client;
#else
    ip_event_ap_staipassigned_t ip_ap_staipassigned;
#endif
  } data;
};
 
// general design: event handler translates events and pushes them to a queue,
// events get processed in the main loop
void event_handler(void *arg, esp_event_base_t event_base, int32_t event_id, void *event_data) {
  IDFWiFiEvent event;
  memset(&event, 0, sizeof(IDFWiFiEvent));
  event.event_base = event_base;
  event.event_id = event_id;
  if (event_base == WIFI_EVENT && event_id == WIFI_EVENT_STA_START) {  // NOLINT(bugprone-branch-clone)
    // no data
  } else if (event_base == WIFI_EVENT && event_id == WIFI_EVENT_STA_STOP) {  // NOLINT(bugprone-branch-clone)
    // no data
  } else if (event_base == WIFI_EVENT && event_id == WIFI_EVENT_STA_AUTHMODE_CHANGE) {
    memcpy(&event.data.sta_authmode_change, event_data, sizeof(wifi_event_sta_authmode_change_t));
  } else if (event_base == WIFI_EVENT && event_id == WIFI_EVENT_STA_CONNECTED) {
    memcpy(&event.data.sta_connected, event_data, sizeof(wifi_event_sta_connected_t));
  } else if (event_base == WIFI_EVENT && event_id == WIFI_EVENT_STA_DISCONNECTED) {
    memcpy(&event.data.sta_disconnected, event_data, sizeof(wifi_event_sta_disconnected_t));
  } else if (event_base == IP_EVENT && event_id == IP_EVENT_STA_GOT_IP) {
    memcpy(&event.data.ip_got_ip, event_data, sizeof(ip_event_got_ip_t));
#if USE_NETWORK_IPV6
  } else if (event_base == IP_EVENT && event_id == IP_EVENT_GOT_IP6) {
    memcpy(&event.data.ip_got_ip6, event_data, sizeof(ip_event_got_ip6_t));
#endif
  } else if (event_base == IP_EVENT && event_id == IP_EVENT_STA_LOST_IP) {  // NOLINT(bugprone-branch-clone)
    // no data
  } else if (event_base == WIFI_EVENT && event_id == WIFI_EVENT_SCAN_DONE) {
    memcpy(&event.data.sta_scan_done, event_data, sizeof(wifi_event_sta_scan_done_t));
  } else if (event_base == WIFI_EVENT && event_id == WIFI_EVENT_AP_START) {  // NOLINT(bugprone-branch-clone)
    // no data
  } else if (event_base == WIFI_EVENT && event_id == WIFI_EVENT_AP_STOP) {  // NOLINT(bugprone-branch-clone)
    // no data
  } else if (event_base == WIFI_EVENT && event_id == WIFI_EVENT_AP_PROBEREQRECVED) {
    memcpy(&event.data.ap_probe_req_rx, event_data, sizeof(wifi_event_ap_probe_req_rx_t));
  } else if (event_base == WIFI_EVENT && event_id == WIFI_EVENT_AP_STACONNECTED) {
    memcpy(&event.data.ap_staconnected, event_data, sizeof(wifi_event_ap_staconnected_t));
  } else if (event_base == WIFI_EVENT && event_id == WIFI_EVENT_AP_STADISCONNECTED) {
    memcpy(&event.data.ap_stadisconnected, event_data, sizeof(wifi_event_ap_stadisconnected_t));
#if ESP_IDF_VERSION >= ESP_IDF_VERSION_VAL(6, 0, 0)
  } else if (event_base == IP_EVENT && event_id == IP_EVENT_ASSIGNED_IP_TO_CLIENT) {
    memcpy(&event.data.ip_assigned_ip_to_client, event_data, sizeof(ip_event_assigned_ip_to_client_t));
#else
  } else if (event_base == IP_EVENT && event_id == IP_EVENT_AP_STAIPASSIGNED) {
    memcpy(&event.data.ip_ap_staipassigned, event_data, sizeof(ip_event_ap_staipassigned_t));
#endif
  } else {
    // did not match any event, don't send anything
    return;
  }
 
  // copy to heap — WiFi events are rare so heap alloc is fine
  auto *to_send = new IDFWiFiEvent;  // NOLINT(cppcoreguidelines-owning-memory)
  memcpy(to_send, &event, sizeof(IDFWiFiEvent));
  if (!global_wifi_component->event_queue_.push(to_send)) {
    delete to_send;  // NOLINT(cppcoreguidelines-owning-memory)
  }
}
 
void WiFiComponent::wifi_pre_setup_() {
  uint8_t mac[6];
  if (has_custom_mac_address()) {
    get_mac_address_raw(mac);
    set_mac_address(mac);
  }
  // Network interface setup handled by network component
  s_wifi_event_group = xEventGroupCreate();
  if (s_wifi_event_group == nullptr) {
    ESP_LOGE(TAG, "xEventGroupCreate failed");
    return;
  }
  esp_event_handler_instance_t instance_wifi_id, instance_ip_id;
  esp_err_t err =
      esp_event_handler_instance_register(WIFI_EVENT, ESP_EVENT_ANY_ID, &event_handler, nullptr, &instance_wifi_id);
  if (err != ERR_OK) {
    ESP_LOGE(TAG, "esp_event_handler_instance_register failed: %s", esp_err_to_name(err));
    return;
  }
  err = esp_event_handler_instance_register(IP_EVENT, ESP_EVENT_ANY_ID, &event_handler, nullptr, &instance_ip_id);
  if (err != ERR_OK) {
    ESP_LOGE(TAG, "esp_event_handler_instance_register failed: %s", esp_err_to_name(err));
    return;
  }
  // NOTE: netif creation + esp_wifi_init() used to live here. They allocate ~15-30KB of
  // DMA-capable internal SRAM, which competes with W5500 SPI DMA and I2S DMA on
  // memory-tight devices. They are now deferred to wifi_lazy_init_(), called from
  // setup() when enable_on_boot_ is true, or from enable() on first runtime enable.
  // This makes enable_on_boot:false genuinely skip the wifi DMA allocation.
}
 
void WiFiComponent::wifi_lazy_init_() {
  if (this->wifi_initialized_)
    return;
 
  // Guard each creation so partial init (e.g. a failed esp_wifi_init() below)
  // followed by a retry via enable() does not leak the existing netif handle
  // nor re-register the default WiFi handlers.
  if (s_sta_netif == nullptr)
    s_sta_netif = esp_netif_create_default_wifi_sta();
 
#ifdef USE_WIFI_AP
  if (s_ap_netif == nullptr)
    s_ap_netif = esp_netif_create_default_wifi_ap();
#endif  // USE_WIFI_AP
 
  wifi_init_config_t cfg = WIFI_INIT_CONFIG_DEFAULT();
  if (global_preferences->nvs_handle == 0) {
    ESP_LOGW(TAG, "starting wifi without nvs");
    cfg.nvs_enable = false;
  }
  esp_err_t err = esp_wifi_init(&cfg);
  if (err != ERR_OK) {
    ESP_LOGE(TAG, "esp_wifi_init failed: %s", esp_err_to_name(err));
    return;
  }
  err = esp_wifi_set_storage(WIFI_STORAGE_RAM);
  if (err != ERR_OK) {
    ESP_LOGE(TAG, "esp_wifi_set_storage failed: %s", esp_err_to_name(err));
    return;
  }
  this->wifi_initialized_ = true;
}
 
bool WiFiComponent::wifi_mode_(optional<bool> sta, optional<bool> ap) {
  esp_err_t err;
  wifi_mode_t current_mode = WIFI_MODE_NULL;
  if (s_wifi_started) {
    err = esp_wifi_get_mode(&current_mode);
    if (err != ERR_OK) {
      ESP_LOGW(TAG, "esp_wifi_get_mode failed: %s", esp_err_to_name(err));
      return false;
    }
  }
  bool current_sta = current_mode == WIFI_MODE_STA || current_mode == WIFI_MODE_APSTA;
  bool current_ap = current_mode == WIFI_MODE_AP || current_mode == WIFI_MODE_APSTA;
 
  bool set_sta = sta.value_or(current_sta);
  bool set_ap = ap.value_or(current_ap);
 
  wifi_mode_t set_mode;
  if (set_sta && set_ap) {
    set_mode = WIFI_MODE_APSTA;
  } else if (set_sta && !set_ap) {
    set_mode = WIFI_MODE_STA;
  } else if (!set_sta && set_ap) {
    set_mode = WIFI_MODE_AP;
  } else {
    set_mode = WIFI_MODE_NULL;
  }
 
  if (current_mode == set_mode)
    return true;
 
  if (set_sta && !current_sta) {
    ESP_LOGV(TAG, "Enabling STA");
  } else if (!set_sta && current_sta) {
    ESP_LOGV(TAG, "Disabling STA");
  }
  if (set_ap && !current_ap) {
    ESP_LOGV(TAG, "Enabling AP");
  } else if (!set_ap && current_ap) {
    ESP_LOGV(TAG, "Disabling AP");
  }
 
  if (set_mode == WIFI_MODE_NULL && s_wifi_started) {
    err = esp_wifi_stop();
    if (err != ESP_OK) {
      ESP_LOGV(TAG, "esp_wifi_stop failed: %s", esp_err_to_name(err));
      return false;
    }
    s_wifi_started = false;
    return true;
  }
 
  err = esp_wifi_set_mode(set_mode);
  if (err != ERR_OK) {
    ESP_LOGW(TAG, "esp_wifi_set_mode failed: %s", esp_err_to_name(err));
    return false;
  }
 
  if (set_mode != WIFI_MODE_NULL && !s_wifi_started) {
    err = esp_wifi_start();
    if (err != ESP_OK) {
      ESP_LOGV(TAG, "esp_wifi_start failed: %s", esp_err_to_name(err));
      return false;
    }
    s_wifi_started = true;
  }
 
  return true;
}
 
bool WiFiComponent::wifi_sta_pre_setup_() { return this->wifi_mode_(true, {}); }
 
bool WiFiComponent::wifi_apply_output_power_(float output_power) {
  int8_t val = static_cast<int8_t>(output_power * 4);
  return esp_wifi_set_max_tx_power(val) == ESP_OK;
}
 
bool WiFiComponent::wifi_apply_power_save_() {
  wifi_ps_type_t power_save;
  switch (this->power_save_) {
    case WIFI_POWER_SAVE_LIGHT:
      power_save = WIFI_PS_MIN_MODEM;
      break;
    case WIFI_POWER_SAVE_HIGH:
      power_save = WIFI_PS_MAX_MODEM;
      break;
    case WIFI_POWER_SAVE_NONE:
    default:
      power_save = WIFI_PS_NONE;
      break;
  }
  bool success = esp_wifi_set_ps(power_save) == ESP_OK;
#ifdef USE_WIFI_POWER_SAVE_LISTENERS
  if (success) {
    for (auto *listener : this->power_save_listeners_) {
      listener->on_wifi_power_save(this->power_save_);
    }
  }
#endif
  return success;
}
 
#ifdef SOC_WIFI_SUPPORT_5G
bool WiFiComponent::wifi_apply_band_mode_() { return esp_wifi_set_band_mode(this->band_mode_) == ESP_OK; }
#endif
 
bool WiFiComponent::wifi_sta_connect_(const WiFiAP &ap) {
  // enable STA
  if (!this->wifi_mode_(true, {}))
    return false;
 
  // https://docs.espressif.com/projects/esp-idf/en/latest/esp32/api-reference/network/esp_wifi.html#_CPPv417wifi_sta_config_t
  wifi_config_t conf;
  memset(&conf, 0, sizeof(conf));
  if (ap.ssid_.size() > sizeof(conf.sta.ssid)) {
    ESP_LOGE(TAG, "SSID too long");
    return false;
  }
  if (ap.password_.size() > sizeof(conf.sta.password)) {
    ESP_LOGE(TAG, "Password too long");
    return false;
  }
  memcpy(reinterpret_cast<char *>(conf.sta.ssid), ap.ssid_.c_str(), ap.ssid_.size());
  memcpy(reinterpret_cast<char *>(conf.sta.password), ap.password_.c_str(), ap.password_.size());
 
  // The weakest authmode to accept in the fast scan mode
  if (ap.password_.empty()) {
    conf.sta.threshold.authmode = WIFI_AUTH_OPEN;
  } else {
    // Set threshold based on configured minimum auth mode
    switch (this->min_auth_mode_) {
      case WIFI_MIN_AUTH_MODE_WPA:
        conf.sta.threshold.authmode = WIFI_AUTH_WPA_PSK;
        break;
      case WIFI_MIN_AUTH_MODE_WPA2:
        conf.sta.threshold.authmode = WIFI_AUTH_WPA2_PSK;
        break;
      case WIFI_MIN_AUTH_MODE_WPA3:
        conf.sta.threshold.authmode = WIFI_AUTH_WPA3_PSK;
        break;
    }
  }
 
#ifdef USE_WIFI_WPA2_EAP
  if (ap.get_eap().has_value()) {
    conf.sta.threshold.authmode = WIFI_AUTH_WPA2_ENTERPRISE;
  }
#endif
 
#ifdef USE_WIFI_11KV_SUPPORT
  conf.sta.btm_enabled = this->btm_;
  conf.sta.rm_enabled = this->rrm_;
#endif
 
  if (ap.has_bssid()) {
    conf.sta.bssid_set = true;
    memcpy(conf.sta.bssid, ap.get_bssid().data(), 6);
  } else {
    conf.sta.bssid_set = false;
  }
  if (ap.has_channel()) {
    conf.sta.channel = ap.get_channel();
    conf.sta.scan_method = WIFI_FAST_SCAN;
  } else {
    conf.sta.scan_method = WIFI_ALL_CHANNEL_SCAN;
  }
  // Listen interval for ESP32 station to receive beacon when WIFI_PS_MAX_MODEM is set.
  // Units: AP beacon intervals. Defaults to 3 if set to 0.
  conf.sta.listen_interval = 0;
 
  // Protected Management Frame
  // Device will prefer to connect in PMF mode if other device also advertises PMF capability.
  conf.sta.pmf_cfg.capable = true;
  conf.sta.pmf_cfg.required = false;
 
  // note, we do our own filtering
  // The minimum rssi to accept in the fast scan mode
  conf.sta.threshold.rssi = -127;
 
  wifi_config_t current_conf;
  esp_err_t err;
  err = esp_wifi_get_config(WIFI_IF_STA, &current_conf);
  if (err != ERR_OK) {
    ESP_LOGW(TAG, "esp_wifi_get_config failed: %s", esp_err_to_name(err));
    // can continue
  }
 
  if (memcmp(&current_conf, &conf, sizeof(wifi_config_t)) != 0) {  // NOLINT
    err = esp_wifi_disconnect();
    if (err != ESP_OK) {
      ESP_LOGV(TAG, "esp_wifi_disconnect failed: %s", esp_err_to_name(err));
      return false;
    }
  }
 
  err = esp_wifi_set_config(WIFI_IF_STA, &conf);
  if (err != ESP_OK) {
    ESP_LOGV(TAG, "esp_wifi_set_config failed: %s", esp_err_to_name(err));
    return false;
  }
 
#ifdef USE_WIFI_MANUAL_IP
  if (!this->wifi_sta_ip_config_(ap.get_manual_ip())) {
    return false;
  }
#else
  if (!this->wifi_sta_ip_config_({})) {
    return false;
  }
#endif
 
  // setup enterprise authentication if required
#ifdef USE_WIFI_WPA2_EAP
  const auto &eap_opt = ap.get_eap();
  if (eap_opt.has_value()) {
    // note: all certificates and keys have to be null terminated. Lengths are appended by +1 to include \0.
    const EAPAuth &eap = *eap_opt;
#if ESP_IDF_VERSION >= ESP_IDF_VERSION_VAL(5, 1, 0)
    err = esp_eap_client_set_identity((uint8_t *) eap.identity.c_str(), eap.identity.length());
#else
    err = esp_wifi_sta_wpa2_ent_set_identity((uint8_t *) eap.identity.c_str(), eap.identity.length());
#endif
    if (err != ESP_OK) {
      ESP_LOGV(TAG, "set_identity failed %d", err);
    }
    int ca_cert_len = strlen(eap.ca_cert);
    int client_cert_len = strlen(eap.client_cert);
    int client_key_len = strlen(eap.client_key);
    if (ca_cert_len) {
#if ESP_IDF_VERSION >= ESP_IDF_VERSION_VAL(5, 1, 0)
      err = esp_eap_client_set_ca_cert((uint8_t *) eap.ca_cert, ca_cert_len + 1);
#else
      err = esp_wifi_sta_wpa2_ent_set_ca_cert((uint8_t *) eap.ca_cert, ca_cert_len + 1);
#endif
      if (err != ESP_OK) {
        ESP_LOGV(TAG, "set_ca_cert failed %d", err);
      }
    }
    // workout what type of EAP this is
    // validation is not required as the config tool has already validated it
    if (client_cert_len && client_key_len) {
      // if we have certs, this must be EAP-TLS
#if ESP_IDF_VERSION >= ESP_IDF_VERSION_VAL(5, 1, 0)
      err = esp_eap_client_set_certificate_and_key((uint8_t *) eap.client_cert, client_cert_len + 1,
                                                   (uint8_t *) eap.client_key, client_key_len + 1,
                                                   (uint8_t *) eap.password.c_str(), eap.password.length());
#else
      err = esp_wifi_sta_wpa2_ent_set_cert_key((uint8_t *) eap.client_cert, client_cert_len + 1,
                                               (uint8_t *) eap.client_key, client_key_len + 1,
                                               (uint8_t *) eap.password.c_str(), eap.password.length());
#endif
      if (err != ESP_OK) {
        ESP_LOGV(TAG, "set_cert_key failed %d", err);
      }
    } else {
      // in the absence of certs, assume this is username/password based
#if ESP_IDF_VERSION >= ESP_IDF_VERSION_VAL(5, 1, 0)
      err = esp_eap_client_set_username((uint8_t *) eap.username.c_str(), eap.username.length());
#else
      err = esp_wifi_sta_wpa2_ent_set_username((uint8_t *) eap.username.c_str(), eap.username.length());
#endif
      if (err != ESP_OK) {
        ESP_LOGV(TAG, "set_username failed %d", err);
      }
#if ESP_IDF_VERSION >= ESP_IDF_VERSION_VAL(5, 1, 0)
      err = esp_eap_client_set_password((uint8_t *) eap.password.c_str(), eap.password.length());
#else
      err = esp_wifi_sta_wpa2_ent_set_password((uint8_t *) eap.password.c_str(), eap.password.length());
#endif
      if (err != ESP_OK) {
        ESP_LOGV(TAG, "set_password failed %d", err);
      }
      // set TTLS Phase 2, defaults to MSCHAPV2
#if ESP_IDF_VERSION >= ESP_IDF_VERSION_VAL(5, 1, 0)
      err = esp_eap_client_set_ttls_phase2_method(eap.ttls_phase_2);
#else
      err = esp_wifi_sta_wpa2_ent_set_ttls_phase2_method(eap.ttls_phase_2);
#endif
      if (err != ESP_OK) {
        ESP_LOGV(TAG, "set_ttls_phase2_method failed %d", err);
      }
    }
#if ESP_IDF_VERSION >= ESP_IDF_VERSION_VAL(5, 1, 0)
    err = esp_wifi_sta_enterprise_enable();
#else
    err = esp_wifi_sta_wpa2_ent_enable();
#endif
    if (err != ESP_OK) {
      ESP_LOGV(TAG, "enterprise_enable failed %d", err);
    }
  }
#endif  // USE_WIFI_WPA2_EAP
 
  // Reset flags, do this _before_ wifi_station_connect as the callback method
  // may be called from wifi_station_connect
  s_sta_connecting = true;
  s_sta_connected = false;
  s_sta_connect_error = false;
  s_sta_connect_not_found = false;
  // Reset IP address flags - ensures we don't report connected before DHCP completes
  // (IP_EVENT_STA_LOST_IP doesn't always fire on disconnect)
  this->got_ipv4_address_ = false;
#if USE_NETWORK_IPV6
  this->num_ipv6_addresses_ = 0;
#endif
 
  err = esp_wifi_connect();
  if (err != ESP_OK) {
    ESP_LOGW(TAG, "esp_wifi_connect failed: %s", esp_err_to_name(err));
    return false;
  }
 
  return true;
}
 
bool WiFiComponent::wifi_sta_ip_config_(const optional<ManualIP> &manual_ip) {
  // enable STA
  if (!this->wifi_mode_(true, {}))
    return false;
 
  // Check if the STA interface is initialized before using it
  if (s_sta_netif == nullptr) {
    ESP_LOGW(TAG, "STA interface not initialized");
    return false;
  }
 
  esp_netif_dhcp_status_t dhcp_status;
  esp_err_t err = esp_netif_dhcpc_get_status(s_sta_netif, &dhcp_status);
  if (err != ESP_OK) {
    ESP_LOGV(TAG, "esp_netif_dhcpc_get_status failed: %s", esp_err_to_name(err));
    return false;
  }
 
  if (!manual_ip.has_value()) {
    // lwIP starts the SNTP client if it gets an SNTP server from DHCP. We don't need the time, and more importantly,
    // the built-in SNTP client has a memory leak in certain situations. Disable this feature.
    // https://github.com/esphome/issues/issues/2299
    sntp_servermode_dhcp(false);
 
    // No manual IP is set; use DHCP client
    if (dhcp_status != ESP_NETIF_DHCP_STARTED) {
      err = esp_netif_dhcpc_start(s_sta_netif);
      if (err != ESP_OK) {
        ESP_LOGV(TAG, "Starting DHCP client failed: %d", err);
      }
      return err == ESP_OK;
    }
    return true;
  }
 
  esp_netif_ip_info_t info;  // struct of ip4_addr_t with ip, netmask, gw
  info.ip = manual_ip->static_ip;
  info.gw = manual_ip->gateway;
  info.netmask = manual_ip->subnet;
  err = esp_netif_dhcpc_stop(s_sta_netif);
  if (err != ESP_OK && err != ESP_ERR_ESP_NETIF_DHCP_ALREADY_STOPPED) {
    ESP_LOGV(TAG, "Stopping DHCP client failed: %s", esp_err_to_name(err));
  }
 
  err = esp_netif_set_ip_info(s_sta_netif, &info);
  if (err != ESP_OK) {
    ESP_LOGV(TAG, "Setting manual IP info failed: %s", esp_err_to_name(err));
  }
 
  esp_netif_dns_info_t dns;
  if (manual_ip->dns1.is_set()) {
    dns.ip = manual_ip->dns1;
    esp_netif_set_dns_info(s_sta_netif, ESP_NETIF_DNS_MAIN, &dns);
  }
  if (manual_ip->dns2.is_set()) {
    dns.ip = manual_ip->dns2;
    esp_netif_set_dns_info(s_sta_netif, ESP_NETIF_DNS_BACKUP, &dns);
  }
 
  return true;
}
 
network::IPAddresses WiFiComponent::wifi_sta_ip_addresses() {
  if (!this->has_sta())
    return {};
  network::IPAddresses addresses;
  esp_netif_ip_info_t ip;
  esp_err_t err = esp_netif_get_ip_info(s_sta_netif, &ip);
  if (err != ESP_OK) {
    ESP_LOGV(TAG, "esp_netif_get_ip_info failed: %s", esp_err_to_name(err));
    // TODO: do something smarter
    // return false;
  } else {
    addresses[0] = network::IPAddress(&ip.ip);
  }
#if USE_NETWORK_IPV6
  struct esp_ip6_addr if_ip6s[CONFIG_LWIP_IPV6_NUM_ADDRESSES];
  uint8_t count = 0;
  count = esp_netif_get_all_ip6(s_sta_netif, if_ip6s);
  assert(count <= CONFIG_LWIP_IPV6_NUM_ADDRESSES);
  assert(count < addresses.size());
  for (int i = 0; i < count; i++) {
    addresses[i + 1] = network::IPAddress(&if_ip6s[i]);
  }
#endif /* USE_NETWORK_IPV6 */
  return addresses;
}
 
bool WiFiComponent::wifi_apply_hostname_() {
  // setting is done in SYSTEM_EVENT_STA_START callback
  return true;
}
const char *get_auth_mode_str(uint8_t mode) {
  switch (mode) {
    case WIFI_AUTH_OPEN:
      return "OPEN";
    case WIFI_AUTH_WEP:
      return "WEP";
    case WIFI_AUTH_WPA_PSK:
      return "WPA PSK";
    case WIFI_AUTH_WPA2_PSK:
      return "WPA2 PSK";
    case WIFI_AUTH_WPA_WPA2_PSK:
      return "WPA/WPA2 PSK";
    case WIFI_AUTH_WPA2_ENTERPRISE:
      return "WPA2 Enterprise";
    case WIFI_AUTH_WPA3_PSK:
      return "WPA3 PSK";
    case WIFI_AUTH_WPA2_WPA3_PSK:
      return "WPA2/WPA3 PSK";
    case WIFI_AUTH_WAPI_PSK:
      return "WAPI PSK";
    default:
      return "UNKNOWN";
  }
}
 
const char *get_disconnect_reason_str(uint8_t reason) {
  switch (reason) {
    case WIFI_REASON_AUTH_EXPIRE:
      return "Auth Expired";
    case WIFI_REASON_AUTH_LEAVE:
      return "Auth Leave";
#if ESP_IDF_VERSION >= ESP_IDF_VERSION_VAL(6, 0, 0)
    case WIFI_REASON_DISASSOC_DUE_TO_INACTIVITY:
      return "Disassociated Due to Inactivity";
#else
    case WIFI_REASON_ASSOC_EXPIRE:
      return "Association Expired";
#endif
    case WIFI_REASON_ASSOC_TOOMANY:
      return "Too Many Associations";
#if ESP_IDF_VERSION >= ESP_IDF_VERSION_VAL(6, 0, 0)
    case WIFI_REASON_CLASS2_FRAME_FROM_NONAUTH_STA:
      return "Class 2 Frame from Non-Authenticated STA";
    case WIFI_REASON_CLASS3_FRAME_FROM_NONASSOC_STA:
      return "Class 3 Frame from Non-Associated STA";
#else
    case WIFI_REASON_NOT_AUTHED:
      return "Not Authenticated";
    case WIFI_REASON_NOT_ASSOCED:
      return "Not Associated";
#endif
    case WIFI_REASON_ASSOC_LEAVE:
      return "Association Leave";
    case WIFI_REASON_ASSOC_NOT_AUTHED:
      return "Association not Authenticated";
    case WIFI_REASON_DISASSOC_PWRCAP_BAD:
      return "Disassociate Power Cap Bad";
    case WIFI_REASON_DISASSOC_SUPCHAN_BAD:
      return "Disassociate Supported Channel Bad";
    case WIFI_REASON_IE_INVALID:
      return "IE Invalid";
    case WIFI_REASON_MIC_FAILURE:
      return "Mic Failure";
    case WIFI_REASON_4WAY_HANDSHAKE_TIMEOUT:
      return "4-Way Handshake Timeout";
    case WIFI_REASON_GROUP_KEY_UPDATE_TIMEOUT:
      return "Group Key Update Timeout";
    case WIFI_REASON_IE_IN_4WAY_DIFFERS:
      return "IE In 4-Way Handshake Differs";
    case WIFI_REASON_GROUP_CIPHER_INVALID:
      return "Group Cipher Invalid";
    case WIFI_REASON_PAIRWISE_CIPHER_INVALID:
      return "Pairwise Cipher Invalid";
    case WIFI_REASON_AKMP_INVALID:
      return "AKMP Invalid";
    case WIFI_REASON_UNSUPP_RSN_IE_VERSION:
      return "Unsupported RSN IE version";
    case WIFI_REASON_INVALID_RSN_IE_CAP:
      return "Invalid RSN IE Cap";
    case WIFI_REASON_802_1X_AUTH_FAILED:
      return "802.1x Authentication Failed";
    case WIFI_REASON_CIPHER_SUITE_REJECTED:
      return "Cipher Suite Rejected";
    case WIFI_REASON_BEACON_TIMEOUT:
      return "Beacon Timeout";
    case WIFI_REASON_NO_AP_FOUND:
      return "AP Not Found";
    case WIFI_REASON_AUTH_FAIL:
      return "Authentication Failed";
    case WIFI_REASON_ASSOC_FAIL:
      return "Association Failed";
    case WIFI_REASON_HANDSHAKE_TIMEOUT:
      return "Handshake Failed";
    case WIFI_REASON_CONNECTION_FAIL:
      return "Connection Failed";
    case WIFI_REASON_AP_TSF_RESET:
      return "AP TSF reset";
    case WIFI_REASON_ROAMING:
      return "Station Roaming";
    case WIFI_REASON_ASSOC_COMEBACK_TIME_TOO_LONG:
      return "Association comeback time too long";
    case WIFI_REASON_SA_QUERY_TIMEOUT:
      return "SA query timeout";
#if ESP_IDF_VERSION >= ESP_IDF_VERSION_VAL(5, 2, 0)
    case WIFI_REASON_NO_AP_FOUND_W_COMPATIBLE_SECURITY:
      return "No AP found with compatible security";
    case WIFI_REASON_NO_AP_FOUND_IN_AUTHMODE_THRESHOLD:
      return "No AP found in auth mode threshold";
    case WIFI_REASON_NO_AP_FOUND_IN_RSSI_THRESHOLD:
      return "No AP found in RSSI threshold";
#endif
    case WIFI_REASON_UNSPECIFIED:
    default:
      return "Unspecified";
  }
}
 
bool WiFiComponent::wifi_loop_() {
  // Use pop() directly instead of empty() — pop() costs 1 memw (acquire on tail_),
  // while empty() costs 2 memw (acquire on both head_ and tail_) on Xtensa.
  IDFWiFiEvent *data = this->event_queue_.pop();
  if (data == nullptr)
    return false;
 
  do {
    wifi_process_event_(data);
    delete data;  // NOLINT(cppcoreguidelines-owning-memory)
  } while ((data = this->event_queue_.pop()) != nullptr);
 
  // Drops only occur when the queue is full, and only this loop drains it,
  // so if pop() returned nullptr above we can skip this check.
  uint16_t dropped = this->event_queue_.get_and_reset_dropped_count();
  if (dropped > 0) {
    ESP_LOGW(TAG, "Dropped %u WiFi events due to buffer overflow", dropped);
  }
  return true;
}
// Events are processed from queue in main loop context, but listener notifications
// must be deferred until after the state machine transitions (in check_connecting_finished)
// so that conditions like wifi.connected return correct values in automations.
void WiFiComponent::wifi_process_event_(IDFWiFiEvent *data) {
  esp_err_t err;
  if (data->event_base == WIFI_EVENT && data->event_id == WIFI_EVENT_STA_START) {
    ESP_LOGV(TAG, "STA start");
    // apply hostname
    err = esp_netif_set_hostname(s_sta_netif, App.get_name().c_str());
    if (err != ERR_OK) {
      ESP_LOGW(TAG, "esp_netif_set_hostname failed: %s", esp_err_to_name(err));
    }
 
    s_sta_started = true;
    // re-apply power save mode
    wifi_apply_power_save_();
#ifdef SOC_WIFI_SUPPORT_5G
    wifi_apply_band_mode_();
#endif
 
  } else if (data->event_base == WIFI_EVENT && data->event_id == WIFI_EVENT_STA_STOP) {
    ESP_LOGV(TAG, "STA stop");
    s_sta_started = false;
    s_sta_connecting = false;
 
  } else if (data->event_base == WIFI_EVENT && data->event_id == WIFI_EVENT_STA_AUTHMODE_CHANGE) {
    const auto &it = data->data.sta_authmode_change;
    ESP_LOGV(TAG, "Authmode Change old=%s new=%s", get_auth_mode_str(it.old_mode), get_auth_mode_str(it.new_mode));
 
  } else if (data->event_base == WIFI_EVENT && data->event_id == WIFI_EVENT_STA_CONNECTED) {
    const auto &it = data->data.sta_connected;
#if ESPHOME_LOG_LEVEL >= ESPHOME_LOG_LEVEL_VERBOSE
    char bssid_buf[MAC_ADDRESS_PRETTY_BUFFER_SIZE];
    format_mac_addr_upper(it.bssid, bssid_buf);
    ESP_LOGV(TAG, "Connected ssid='%.*s' bssid=" LOG_SECRET("%s") " channel=%u, authmode=%s", it.ssid_len,
             (const char *) it.ssid, bssid_buf, it.channel, get_auth_mode_str(it.authmode));
#endif
    s_sta_connected = true;
#ifdef USE_WIFI_CONNECT_STATE_LISTENERS
    // Defer listener notification until state machine reaches STA_CONNECTED
    // This ensures wifi.connected condition returns true in listener automations
    this->pending_.connect_state = true;
#endif
    // For static IP configurations, GOT_IP event may not fire, so notify IP listeners here
#if defined(USE_WIFI_IP_STATE_LISTENERS) && defined(USE_WIFI_MANUAL_IP)
    if (const WiFiAP *config = this->get_selected_sta_(); config && config->get_manual_ip().has_value()) {
      this->notify_ip_state_listeners_();
    }
#endif
 
  } else if (data->event_base == WIFI_EVENT && data->event_id == WIFI_EVENT_STA_DISCONNECTED) {
    const auto &it = data->data.sta_disconnected;
    if (it.reason == WIFI_REASON_NO_AP_FOUND) {
      ESP_LOGW(TAG, "Disconnected ssid='%.*s' reason='Probe Request Unsuccessful'", it.ssid_len,
               (const char *) it.ssid);
      s_sta_connect_not_found = true;
    } else if (it.reason == WIFI_REASON_ROAMING) {
      ESP_LOGI(TAG, "Disconnected ssid='%.*s' reason='Station Roaming'", it.ssid_len, (const char *) it.ssid);
      return;
    } else {
      char bssid_s[18];
      format_mac_addr_upper(it.bssid, bssid_s);
      ESP_LOGW(TAG, "Disconnected ssid='%.*s' bssid=" LOG_SECRET("%s") " reason='%s'", it.ssid_len,
               (const char *) it.ssid, bssid_s, get_disconnect_reason_str(it.reason));
      s_sta_connect_error = true;
    }
    s_sta_connected = false;
    s_sta_connecting = false;
    error_from_callback_ = true;
    // Refresh is_connected() cache; error_from_callback_ makes it false.
    this->update_connected_state_();
#ifdef USE_WIFI_CONNECT_STATE_LISTENERS
    this->notify_disconnect_state_listeners_();
#endif
 
  } else if (data->event_base == IP_EVENT && data->event_id == IP_EVENT_STA_GOT_IP) {
    const auto &it = data->data.ip_got_ip;
#if USE_NETWORK_IPV6
    esp_netif_create_ip6_linklocal(s_sta_netif);
#endif /* USE_NETWORK_IPV6 */
    ESP_LOGV(TAG, "static_ip=" IPSTR " gateway=" IPSTR, IP2STR(&it.ip_info.ip), IP2STR(&it.ip_info.gw));
    this->got_ipv4_address_ = true;
#ifdef USE_WIFI_IP_STATE_LISTENERS
    this->notify_ip_state_listeners_();
#endif
 
#if USE_NETWORK_IPV6
  } else if (data->event_base == IP_EVENT && data->event_id == IP_EVENT_GOT_IP6) {
    const auto &it = data->data.ip_got_ip6;
    ESP_LOGV(TAG, "IPv6 address=" IPV6STR, IPV62STR(it.ip6_info.ip));
    this->num_ipv6_addresses_++;
#ifdef USE_WIFI_IP_STATE_LISTENERS
    this->notify_ip_state_listeners_();
#endif
#endif /* USE_NETWORK_IPV6 */
 
  } else if (data->event_base == IP_EVENT && data->event_id == IP_EVENT_STA_LOST_IP) {
    ESP_LOGV(TAG, "Lost IP");
    this->got_ipv4_address_ = false;
 
  } else if (data->event_base == WIFI_EVENT && data->event_id == WIFI_EVENT_SCAN_DONE) {
    const auto &it = data->data.sta_scan_done;
    ESP_LOGV(TAG, "Scan done: status=%" PRIu32 " number=%u scan_id=%u", it.status, it.number, it.scan_id);
 
    scan_result_.clear();
    this->scan_done_ = true;
    if (it.status != 0) {
      // scan error
      return;
    }
 
    if (it.number == 0) {
      // no results
      return;
    }
 
    uint16_t number = it.number;
    bool needs_full = this->needs_full_scan_results_();
 
    // Smart reserve: full capacity if needed, small reserve otherwise
    if (needs_full) {
      this->scan_result_.reserve(number);
    } else {
      this->scan_result_.reserve(WIFI_SCAN_RESULT_FILTERED_RESERVE);
    }
 
#ifdef USE_ESP32_HOSTED
    // getting records one at a time fails on P4 with hosted esp32 WiFi coprocessor
    // Presumably an upstream bug, work-around by getting all records at once
    // Use stack buffer (3904 bytes / ~80 bytes per record = ~48 records) with heap fallback
    static constexpr size_t SCAN_RECORD_STACK_COUNT = 3904 / sizeof(wifi_ap_record_t);
    SmallBufferWithHeapFallback<SCAN_RECORD_STACK_COUNT, wifi_ap_record_t> records(number);
    err = esp_wifi_scan_get_ap_records(&number, records.get());
    if (err != ESP_OK) {
      esp_wifi_clear_ap_list();
      ESP_LOGW(TAG, "esp_wifi_scan_get_ap_records failed: %s", esp_err_to_name(err));
      return;
    }
    for (uint16_t i = 0; i < number; i++) {
      wifi_ap_record_t &record = records.get()[i];
#else
    // Process one record at a time to avoid large buffer allocation
    for (uint16_t i = 0; i < number; i++) {
      wifi_ap_record_t record;
      err = esp_wifi_scan_get_ap_record(&record);
      if (err != ESP_OK) {
        ESP_LOGW(TAG, "esp_wifi_scan_get_ap_record failed: %s", esp_err_to_name(err));
        esp_wifi_clear_ap_list();  // Free remaining records not yet retrieved
        break;
      }
#endif  // USE_ESP32_HOSTED
 
      // Check C string first - avoid std::string construction for non-matching networks
      const char *ssid_cstr = reinterpret_cast<const char *>(record.ssid);
 
      // Only construct std::string and store if needed
      if (needs_full || this->matches_configured_network_(ssid_cstr, record.bssid)) {
        bssid_t bssid;
        std::copy(record.bssid, record.bssid + 6, bssid.begin());
        this->scan_result_.emplace_back(bssid, ssid_cstr, strlen(ssid_cstr), record.primary, record.rssi,
                                        record.authmode != WIFI_AUTH_OPEN, ssid_cstr[0] == '\0');
      } else {
        this->log_discarded_scan_result_(ssid_cstr, record.bssid, record.rssi, record.primary);
      }
    }
    ESP_LOGV(TAG, "Scan complete: %u found, %zu stored%s", number, this->scan_result_.size(),
             needs_full ? "" : " (filtered)");
#ifdef USE_WIFI_SCAN_RESULTS_LISTENERS
    this->notify_scan_results_listeners_();
#endif
 
  } else if (data->event_base == WIFI_EVENT && data->event_id == WIFI_EVENT_AP_START) {
    ESP_LOGV(TAG, "AP start");
    this->ap_started_ = true;
 
  } else if (data->event_base == WIFI_EVENT && data->event_id == WIFI_EVENT_AP_STOP) {
    ESP_LOGV(TAG, "AP stop");
    this->ap_started_ = false;
 
  } else if (data->event_base == WIFI_EVENT && data->event_id == WIFI_EVENT_AP_PROBEREQRECVED) {
#if ESPHOME_LOG_LEVEL >= ESPHOME_LOG_LEVEL_VERY_VERBOSE
    const auto &it = data->data.ap_probe_req_rx;
    char mac_buf[MAC_ADDRESS_PRETTY_BUFFER_SIZE];
    format_mac_addr_upper(it.mac, mac_buf);
    ESP_LOGVV(TAG, "AP receive Probe Request MAC=%s RSSI=%d", mac_buf, it.rssi);
#endif
 
  } else if (data->event_base == WIFI_EVENT && data->event_id == WIFI_EVENT_AP_STACONNECTED) {
#if ESPHOME_LOG_LEVEL >= ESPHOME_LOG_LEVEL_VERBOSE
    const auto &it = data->data.ap_staconnected;
    char mac_buf[MAC_ADDRESS_PRETTY_BUFFER_SIZE];
    format_mac_addr_upper(it.mac, mac_buf);
    ESP_LOGV(TAG, "AP client connected MAC=%s", mac_buf);
#endif
 
  } else if (data->event_base == WIFI_EVENT && data->event_id == WIFI_EVENT_AP_STADISCONNECTED) {
#if ESPHOME_LOG_LEVEL >= ESPHOME_LOG_LEVEL_VERBOSE
    const auto &it = data->data.ap_stadisconnected;
    char mac_buf[MAC_ADDRESS_PRETTY_BUFFER_SIZE];
    format_mac_addr_upper(it.mac, mac_buf);
    ESP_LOGV(TAG, "AP client disconnected MAC=%s", mac_buf);
#endif
 
#if ESP_IDF_VERSION >= ESP_IDF_VERSION_VAL(6, 0, 0)
  } else if (data->event_base == IP_EVENT && data->event_id == IP_EVENT_ASSIGNED_IP_TO_CLIENT) {
    const auto &it = data->data.ip_assigned_ip_to_client;
#else
  } else if (data->event_base == IP_EVENT && data->event_id == IP_EVENT_AP_STAIPASSIGNED) {
    const auto &it = data->data.ip_ap_staipassigned;
#endif
    ESP_LOGV(TAG, "AP client assigned IP " IPSTR, IP2STR(&it.ip));
  }
}
 
WiFiSTAConnectStatus WiFiComponent::wifi_sta_connect_status_() const {
  if (s_sta_connected && this->got_ipv4_address_) {
#if USE_NETWORK_IPV6 && (USE_NETWORK_MIN_IPV6_ADDR_COUNT > 0)
    if (this->num_ipv6_addresses_ >= USE_NETWORK_MIN_IPV6_ADDR_COUNT) {
      return WiFiSTAConnectStatus::CONNECTED;
    }
#else
    return WiFiSTAConnectStatus::CONNECTED;
#endif /* USE_NETWORK_IPV6 */
  }
  if (s_sta_connect_error) {
    return WiFiSTAConnectStatus::ERROR_CONNECT_FAILED;
  }
  if (s_sta_connect_not_found) {
    return WiFiSTAConnectStatus::ERROR_NETWORK_NOT_FOUND;
  }
  if (s_sta_connecting) {
    return WiFiSTAConnectStatus::CONNECTING;
  }
  return WiFiSTAConnectStatus::IDLE;
}
bool WiFiComponent::wifi_scan_start_(bool passive) {
  // enable STA
  if (!this->wifi_mode_(true, {}))
    return false;
 
  wifi_scan_config_t config{};
  config.ssid = nullptr;
  config.bssid = nullptr;
  config.channel = 0;
  config.show_hidden = true;
  config.scan_type = passive ? WIFI_SCAN_TYPE_PASSIVE : WIFI_SCAN_TYPE_ACTIVE;
  if (passive) {
    config.scan_time.passive = 300;
  } else {
    config.scan_time.active.min = 100;
    config.scan_time.active.max = 300;
  }
  // When scanning while connected (roaming), return to home channel between
  // each scanned channel to maintain the connection (helps with BLE/WiFi coexistence)
#ifdef CONFIG_SOC_WIFI_SUPPORTED
  if (this->roaming_state_ == RoamingState::SCANNING) {
    config.coex_background_scan = true;
  }
#endif
 
  esp_err_t err = esp_wifi_scan_start(&config, false);
  if (err != ESP_OK) {
    ESP_LOGV(TAG, "esp_wifi_scan_start failed: %s", esp_err_to_name(err));
    return false;
  }
 
  this->scan_done_ = false;
  return true;
}
 
#ifdef USE_WIFI_AP
bool WiFiComponent::wifi_ap_ip_config_(const optional<ManualIP> &manual_ip) {
  esp_err_t err;
 
  // enable AP
  if (!this->wifi_mode_({}, true))
    return false;
 
  // Check if the AP interface is initialized before using it
  if (s_ap_netif == nullptr) {
    ESP_LOGW(TAG, "AP interface not initialized");
    return false;
  }
 
  esp_netif_ip_info_t info;
  if (manual_ip.has_value()) {
    info.ip = manual_ip->static_ip;
    info.gw = manual_ip->gateway;
    info.netmask = manual_ip->subnet;
  } else {
    info.ip = network::IPAddress(192, 168, 4, 1);
    info.gw = network::IPAddress(192, 168, 4, 1);
    info.netmask = network::IPAddress(255, 255, 255, 0);
  }
 
  err = esp_netif_dhcps_stop(s_ap_netif);
  if (err != ESP_OK && err != ESP_ERR_ESP_NETIF_DHCP_ALREADY_STOPPED) {
    ESP_LOGE(TAG, "esp_netif_dhcps_stop failed: %s", esp_err_to_name(err));
    return false;
  }
 
  err = esp_netif_set_ip_info(s_ap_netif, &info);
  if (err != ESP_OK) {
    ESP_LOGE(TAG, "esp_netif_set_ip_info failed: %d", err);
    return false;
  }
 
  dhcps_lease_t lease;
  lease.enable = true;
  network::IPAddress start_address = network::IPAddress(&info.ip);
  start_address += 99;
  lease.start_ip = start_address;
#if ESPHOME_LOG_LEVEL >= ESPHOME_LOG_LEVEL_VERBOSE
  char ip_buf[network::IP_ADDRESS_BUFFER_SIZE];
#endif
  ESP_LOGV(TAG, "DHCP server IP lease start: %s", start_address.str_to(ip_buf));
  start_address += 10;
  lease.end_ip = start_address;
  ESP_LOGV(TAG, "DHCP server IP lease end: %s", start_address.str_to(ip_buf));
  err = esp_netif_dhcps_option(s_ap_netif, ESP_NETIF_OP_SET, ESP_NETIF_REQUESTED_IP_ADDRESS, &lease, sizeof(lease));
 
  if (err != ESP_OK) {
    ESP_LOGE(TAG, "esp_netif_dhcps_option failed: %d", err);
    return false;
  }
 
#if defined(USE_CAPTIVE_PORTAL) && ESP_IDF_VERSION >= ESP_IDF_VERSION_VAL(5, 4, 0)
  // Configure DHCP Option 114 (Captive Portal URI) if captive portal is enabled
  // This provides a standards-compliant way for clients to discover the captive portal
  if (captive_portal::global_captive_portal != nullptr) {
    // Buffer must be static - dhcps_set_option_info stores pointer, doesn't copy
    static char captive_portal_uri[24];        // "http://" (7) + IPv4 max (15) + null
    memcpy(captive_portal_uri, "http://", 7);  // NOLINT(bugprone-not-null-terminated-result) - str_to null-terminates
    network::IPAddress(&info.ip).str_to(captive_portal_uri + 7);
    err = esp_netif_dhcps_option(s_ap_netif, ESP_NETIF_OP_SET, ESP_NETIF_CAPTIVEPORTAL_URI, captive_portal_uri,
                                 strlen(captive_portal_uri));
    if (err != ESP_OK) {
      ESP_LOGV(TAG, "Failed to set DHCP captive portal URI: %s", esp_err_to_name(err));
    } else {
      ESP_LOGV(TAG, "DHCP Captive Portal URI set to: %s", captive_portal_uri);
    }
  }
#endif
 
  err = esp_netif_dhcps_start(s_ap_netif);
 
  if (err != ESP_OK) {
    ESP_LOGE(TAG, "esp_netif_dhcps_start failed: %d", err);
    return false;
  }
 
  return true;
}
 
bool WiFiComponent::wifi_start_ap_(const WiFiAP &ap) {
  // enable AP
  if (!this->wifi_mode_({}, true))
    return false;
 
  wifi_config_t conf;
  memset(&conf, 0, sizeof(conf));
  if (ap.ssid_.size() > sizeof(conf.ap.ssid)) {
    ESP_LOGE(TAG, "AP SSID too long");
    return false;
  }
  memcpy(reinterpret_cast<char *>(conf.ap.ssid), ap.ssid_.c_str(), ap.ssid_.size());
  conf.ap.channel = ap.has_channel() ? ap.get_channel() : 1;
  conf.ap.ssid_hidden = ap.get_hidden();
  conf.ap.max_connection = 5;
  conf.ap.beacon_interval = 100;
 
  if (ap.password_.empty()) {
    conf.ap.authmode = WIFI_AUTH_OPEN;
    *conf.ap.password = 0;
  } else {
    conf.ap.authmode = WIFI_AUTH_WPA2_PSK;
    if (ap.password_.size() > sizeof(conf.ap.password)) {
      ESP_LOGE(TAG, "AP password too long");
      return false;
    }
    memcpy(reinterpret_cast<char *>(conf.ap.password), ap.password_.c_str(), ap.password_.size());
  }
 
  // pairwise cipher of SoftAP, group cipher will be derived using this.
  conf.ap.pairwise_cipher = WIFI_CIPHER_TYPE_CCMP;
 
  esp_err_t err = esp_wifi_set_config(WIFI_IF_AP, &conf);
  if (err != ESP_OK) {
    ESP_LOGE(TAG, "esp_wifi_set_config failed: %d", err);
    return false;
  }
 
#ifdef USE_WIFI_MANUAL_IP
  if (!this->wifi_ap_ip_config_(ap.get_manual_ip())) {
    ESP_LOGE(TAG, "wifi_ap_ip_config_ failed:");
    return false;
  }
#else
  if (!this->wifi_ap_ip_config_({})) {
    ESP_LOGE(TAG, "wifi_ap_ip_config_ failed:");
    return false;
  }
#endif
 
  return true;
}
 
network::IPAddress WiFiComponent::wifi_soft_ap_ip() {
  esp_netif_ip_info_t ip;
  esp_netif_get_ip_info(s_ap_netif, &ip);
  return network::IPAddress(&ip.ip);
}
#endif  // USE_WIFI_AP
 
bool WiFiComponent::wifi_disconnect_() { return esp_wifi_disconnect(); }
 
bssid_t WiFiComponent::wifi_bssid() {
  bssid_t bssid{};
  wifi_ap_record_t info;
  esp_err_t err = esp_wifi_sta_get_ap_info(&info);
  if (err != ESP_OK) {
    // Very verbose only: this is expected during dump_config() before connection is established (PR #9823)
    ESP_LOGVV(TAG, "esp_wifi_sta_get_ap_info failed: %s", esp_err_to_name(err));
    return bssid;
  }
  std::copy(info.bssid, info.bssid + 6, bssid.begin());
  return bssid;
}
std::string WiFiComponent::wifi_ssid() {
  wifi_ap_record_t info{};
  esp_err_t err = esp_wifi_sta_get_ap_info(&info);
  if (err != ESP_OK) {
    // Very verbose only: this is expected during dump_config() before connection is established (PR #9823)
    ESP_LOGVV(TAG, "esp_wifi_sta_get_ap_info failed: %s", esp_err_to_name(err));
    return "";
  }
  auto *ssid_s = reinterpret_cast<const char *>(info.ssid);
  size_t len = strnlen(ssid_s, sizeof(info.ssid));
  return {ssid_s, len};
}
const char *WiFiComponent::wifi_ssid_to(std::span<char, SSID_BUFFER_SIZE> buffer) {
  wifi_ap_record_t info{};
  esp_err_t err = esp_wifi_sta_get_ap_info(&info);
  if (err != ESP_OK) {
    buffer[0] = '\0';
    return buffer.data();
  }
  // info.ssid is uint8[33], but only 32 bytes are SSID data
  size_t len = strnlen(reinterpret_cast<const char *>(info.ssid), 32);
  memcpy(buffer.data(), info.ssid, len);
  buffer[len] = '\0';
  return buffer.data();
}
int8_t WiFiComponent::wifi_rssi() {
  wifi_ap_record_t info;
  esp_err_t err = esp_wifi_sta_get_ap_info(&info);
  if (err != ESP_OK) {
    // Very verbose only: this is expected during dump_config() before connection is established (PR #9823)
    ESP_LOGVV(TAG, "esp_wifi_sta_get_ap_info failed: %s", esp_err_to_name(err));
    return WIFI_RSSI_DISCONNECTED;
  }
  return info.rssi;
}
int32_t WiFiComponent::get_wifi_channel() {
  uint8_t primary;
  wifi_second_chan_t second;
  esp_err_t err = esp_wifi_get_channel(&primary, &second);
  if (err != ESP_OK) {
    ESP_LOGW(TAG, "esp_wifi_get_channel failed: %s", esp_err_to_name(err));
    return 0;
  }
  return primary;
}
network::IPAddress WiFiComponent::wifi_subnet_mask_() {
  esp_netif_ip_info_t ip;
  esp_err_t err = esp_netif_get_ip_info(s_sta_netif, &ip);
  if (err != ESP_OK) {
    ESP_LOGW(TAG, "esp_netif_get_ip_info failed: %s", esp_err_to_name(err));
    return {};
  }
  return network::IPAddress(&ip.netmask);
}
network::IPAddress WiFiComponent::wifi_gateway_ip_() {
  esp_netif_ip_info_t ip;
  esp_err_t err = esp_netif_get_ip_info(s_sta_netif, &ip);
  if (err != ESP_OK) {
    ESP_LOGW(TAG, "esp_netif_get_ip_info failed: %s", esp_err_to_name(err));
    return {};
  }
  return network::IPAddress(&ip.gw);
}
network::IPAddress WiFiComponent::wifi_dns_ip_(int num) {
  const ip_addr_t *dns_ip = dns_getserver(num);
  return network::IPAddress(dns_ip);
}
 
}  // namespace esphome::wifi
#endif  // USE_ESP32
#endif