"MAC Capture" rev_01

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    - Project: "MAC Capture"
    - Source Code NOT compiled for: ESP32 DevKit V1
    - Source Code created on: 2024-12-11 15:01:30

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/****** SYSTEM REQUIREMENTS *****/
/****** SYSTEM REQUIREMENT 1 *****/
    /* I want my esp32 to detect mac addresses of other */
    /* devices and I want the mac addresses that I */
    /* indicate to be detected and recorded as PRESENT in */
    /* the serial monitor. */
/****** END SYSTEM REQUIREMENTS *****/

/* START CODE */

/****** DEFINITION OF LIBRARIES *****/
#include <WiFi.h> // Include the WiFi library for ESP32
#include <set>    // Include the set library for unique MAC storage

/****** FUNCTION PROTOTYPES *****/
void setup(void);
void loop(void);

// Define the promiscuous mode filter
wifi_promiscuous_filter_t filter = {
    .filter_mask = WIFI_PROMIS_FILTER_MASK_DATA | WIFI_PROMIS_FILTER_MASK_MGMT,
}; // This filter is used to capture data and management frames

// Set to store unique MAC addresses
std::set<String> uniqueMACs;

// Target MAC address (converted to uppercase for comparison)
const char targetMAC[] = "B8:7E:39:E7:9E:FF";

// Callback to process captured packets
void sniffer_callback(void* buf, wifi_promiscuous_pkt_type_t type) {
    const wifi_promiscuous_pkt_t *ppkt = (wifi_promiscuous_pkt_t *)buf;
    // Extract the source MAC address from the packet
    const uint8_t *mac = ppkt->payload + 10; // Offset to get the source MAC
    char macAddr[18];
    sprintf(macAddr, "%02X:%02X:%02X:%02X:%02X:%02X",
            mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
    String macString = String(macAddr);
    // Check if the MAC has already been detected
    if (uniqueMACs.find(macString) == uniqueMACs.end()) {
        uniqueMACs.insert(macString); // Add MAC to the set
        // Show message if it is the target MAC
        if (strcmp(macAddr, targetMAC) == 0) {
            Serial.println("DIRECCIÓN ENCONTRADA: ASISTIÓ"); // Target MAC found
        } else {
            // Show the unique detected MAC address
            Serial.print("Nueva dirección MAC detectada: ");
            Serial.println(macAddr);
        }
    }
}

void setup(void) {
    Serial.begin(115200); // Initialize serial monitor
    delay(1000);
    // Configure Wi-Fi in station mode
    WiFi.mode(WIFI_MODE_STA);
    esp_wifi_set_promiscuous(true); // Enable promiscuous mode
    esp_wifi_set_promiscuous_filter(&filter); // Apply filter
    esp_wifi_set_promiscuous_rx_cb(&sniffer_callback); // Register callback function
    esp_wifi_start(); // Start Wi-Fi in promiscuous mode
    Serial.println("Modo promiscuo activado. Detectando direcciones MAC únicas...");
}

void loop(void) {
    // No need for anything in the loop, as everything happens in the callback
}

/* END CODE */