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[wifi] Process scan results one at a time to avoid heap allocation (#13400)

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J. Nick Koston
2026-01-20 17:49:40 -10:00
committed by Jonathan Swoboda
parent 15f0986a59
commit 6725e6c01e
1 changed files with 10 additions and 9 deletions
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esphome/components/wifi/wifi_component_esp_idf.cpp
+10 -9
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@@ -827,16 +827,17 @@ void WiFiComponent::wifi_process_event_(IDFWiFiEvent *data) {
} }
uint16_t number = it.number; uint16_t number = it.number;
auto records = std::make_unique<wifi_ap_record_t[]>(number);
err = esp_wifi_scan_get_ap_records(&number, records.get());
if (err != ESP_OK) {
ESP_LOGW(TAG, "esp_wifi_scan_get_ap_records failed: %s", esp_err_to_name(err));
return;
}
scan_result_.init(number); scan_result_.init(number);
for (int i = 0; i < number; i++) {
auto &record = records[i]; // Process one record at a time to avoid large buffer allocation
wifi_ap_record_t record;
for (uint16_t i = 0; i < number; i++) {
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;
}
bssid_t bssid; bssid_t bssid;
std::copy(record.bssid, record.bssid + 6, bssid.begin()); std::copy(record.bssid, record.bssid + 6, bssid.begin());
std::string ssid(reinterpret_cast<const char *>(record.ssid)); std::string ssid(reinterpret_cast<const char *>(record.ssid));