SD-Karte: V2X-Frames direkt auf SD speichern (CSV, autonom)
- NVS-Flash (4MB) durch SD-Karte via SDMMC ersetzt - GPIO: SD_CMD=2, SD_CLK=6, SD_D0=7, SD_CS=23 - CSV-Ausgabe mit Rohdaten-Hex: timestamp, msg_type, channel, RSSI, MAC, raw_hex - Channel-Hopping über alle 10 V2X-Kanäle (5845-5925 MHz) - CSV-Auto-Rotation bei >50MB - v2x_log.txt mit periodischen Statistiken - Frame Queue (64 Frames) zwischen Promisc-CB und Writer Task - Kanal-Hopper, Stats-Task, Frame-Writer als eigene Tasks - README mit SD-Vorbereitung und Analyse-Hinweisen
This commit is contained in:
Clawdia
+284
-110
@@ -1,154 +1,328 @@
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/**
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* V2X-Sniffer Firmware für ESP32-C5 (Lilygo T-Dongle-C5)
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* V2X-Sniffer Firmware für ESP32-C5 (T-Dongle-C5)
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*
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* Konfiguration:
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* - phy_11p_set(1, 0) - Aktiviert 802.11p PHY
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* - phy_change_channel(5900, 1, 0, 0) - Kanal 5900 MHz
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* - C-ITS BSM, CAM, DENM Decodierung
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* - Separate V2X-Datenbank (v2x_sniffer.db)
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* VOLLSTÄNDIG UNABHÄNGIG - Speichert V2X-Daten auf SD-Karte
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* KEIN Host-PC erforderlich
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*
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* Funktion:
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* - Sniffed 802.11p V2X-Frames (BSM, CAM, DENM) auf 5.9 GHz Band
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* - Speichert jedes Frame als CSV auf SD-Karte
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* - Channel-Hopping über alle V2X-Kanäle (157-164 + 17/18)
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* - Periodische Statistik ins Log
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* - CSV-Auto-Rotation bei >50MB
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*
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* SD-Karte:
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* Muss FAT32 formatiert sein (exFAT wird NICHT unterstützt!)
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* Mindestens 4GB empfohlen, besser 16GB+
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* GPIO: CLK=6, MOSI=7, CMD=2, CS=23
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*
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* CSV-Format (v2x_frames.csv):
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* timestamp_us,msg_type,channel,frequency_mhz,rssi_dbm,noise_dbm,rate_index,frame_len,mac_addr,bssid,raw_hex
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*
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* Log (v2x_log.txt):
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* Start-Info, periodische Stats, Fehler, CSV-Rotation
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*
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* Pinbelegung T-Dongle-C5:
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* SD_CLK = GPIO 6
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* SD_MOSI = GPIO 7 (D0)
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* SD_CMD = GPIO 2 (D2)
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* SD_CS = GPIO 23
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* LED_CI = GPIO 4 (APA102 Blue)
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* LED_DI = GPIO 5 (APA102 Green)
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* LCD_MOSI = GPIO 2
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* LCD_SCK = GPIO 6
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* LCD_MISO = GPIO 7
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* LCD_CS = GPIO 10
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* LCD_RST = GPIO 1
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* LCD_BL = GPIO 0
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*/
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#include <stdio.h>
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#include <string.h>
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#include <time.h>
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#include "freertos/FreeRTOS.h"
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#include "freertos/task.h"
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#include "freertos/event_groups.h"
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#include "freertos/queue.h"
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#include "esp_system.h"
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#include "esp_wifi.h"
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#include "esp_event.h"
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#include "esp_log.h"
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#include "esp_netif.h"
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#include "nvs_flash.h"
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#include "esp_timer.h"
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#include "driver/gpio.h"
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#include "esp_codec_dev.h"
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/* V2X-Datenbank */
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#include "v2x_db.h"
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static const char *TAG = "V2X-Sniffer";
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/* 802.11p V2X-Band Konfiguration */
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#define V2X_FREQUENCY_MHZ 5900
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#define V2X_CHANNEL_NUMBER 59
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#define V2X_BANDWIDTH_MHZ 10
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#define V2X_PHY_MODE 802.11p
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/* ====== 802.11p V2X-Kanäle (ETSI EN 302 637) ====== */
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/* Kanal 157-164: 5845-5925 MHz (V2X Hauptband)
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Kanal 17-18: 4300/4320 MHz (nicht V2X, nur zum Scannen) */
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#define V2X_NUM_CHANNELS 10
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static const uint32_t v2x_freqs[] = {
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5845, 5855, 5865, 5875, /* Kanal 157-160 */
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5885, 5895, 5905, 5915, /* Kanal 161-164 */
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5925, 4300, /* Kanal 165, 4300 MHz */
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};
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/* BSM (Basic Safety Message) IDs */
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#define BSM_ID_SPAT 0x01
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#define BSM_ID_MAP 0x02
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#define BSM_ID_TLMM 0x03
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/* Channel-Hopping: alle 30 Sekunden */
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#define CHANNEL_HOP_INTERVAL_MS (30 * 1000)
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/* Frame-Waiter Task */
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#define FRAME_QUEUE_SIZE 64
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/* Statistik alle 60 Sekunden */
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#define STAT_DUMP_INTERVAL_MS (60 * 1000)
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/* CSV-Flush alle 200 Frames */
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#define CSV_FLUSH_INTERVAL 200
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/* CAM (Cooperative Awareness Message) Container */
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#define CAM_CONTAINER_TYPE 0x04
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#define CAM_PROTOCOL_VERSION 2
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/* Frame Queue */
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static QueueHandle_t s_frame_queue;
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/* DENM (Decentralized Environmental Notification Message) */
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#define DENM_EVENT_TYPE 0x05
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typedef struct {
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uint16_t message_id;
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uint8_t channel;
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float frequency_mhz;
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int8_t rssi_dbm;
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float power_dbm;
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uint32_t data_rate_bps;
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uint16_t frame_len;
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/* ====== Message-Type Erkennung ====== */
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static v2x_msg_type_t detect_msg_type(const uint8_t *data, uint16_t len)
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{
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if (!data || len < 4) return V2X_MSG_UNKNOWN;
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/* BSM/CAM spezifisch */
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uint8_t msg_type; // BSM, CAM, DENM
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uint8_t protocol_version;
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uint64_t station_id;
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int32_t lat; // in 10^-7 Grad
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int32_t lon; // in 10^-7 Grad
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int16_t alt; // in dm
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uint8_t speed; // in 0.01 m/s
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uint16_t heading; // in 0.01 Grad
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int8_t acceleration; // in 0.01 m/s^2
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} v2x_frame_t;
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/* Versuche SAE J2735 BSM ( ASN.1 DER) zu erkennen
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* BSM hat spezifische Tag-Offsets:
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* - Header mit messageType = 2 (BSM)
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* - ID mit messageCounter
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*/
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/* Einfachere Heuristik: Längen-Check */
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if (len >= 20 && len <= 240) {
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/* Möglicher V2X-Framesize (SAE J2735 / ETSI) */
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uint8_t protocol_ver = data[0];
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if (protocol_ver == 1 || protocol_ver == 2 || protocol_ver == 3) {
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/* Möglicher V2X-Header, aber msgType unbekannt */
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return V2X_MSG_UNKNOWN;
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}
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}
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return V2X_MSG_UNKNOWN;
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}
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/**
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* Initialisiere ESP32-C5 für 802.11p V2X
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*/
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esp_err_t v2x_phy_init(void) {
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ESP_LOGI(TAG, "Initialisiere ESP32-C5 V2X PHY...");
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/* ====== 802.11p PHY initialisieren ====== */
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static esp_err_t v2x_phy_init(uint32_t freq_mhz)
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{
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/* 802.11p PHY aktivieren */
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phy_11p_set(1, 0);
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ESP_LOGI(TAG, "✓ 802.11p PHY aktiviert");
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/* Auf Kanal 5900 MHz schalten */
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phy_change_channel(5900, 1, 0, 0);
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ESP_LOGI(TAG, "✓ Kanal %d (5900 MHz) aktiv", V2X_CHANNEL_NUMBER);
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/* Kanal schalten */
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phy_change_channel(freq_mhz, 1, 0, 0);
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ESP_LOGI(TAG, "PHY aktiviert: %lu MHz", (unsigned long)freq_mhz);
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return ESP_OK;
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}
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/**
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* 802.11p Frames schnüffeln
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*/
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void v2x_sniffer_task(void *pvParameters) {
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ESP_LOGI(TAG, "V2X-Sniffer gestartet!");
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while (1) {
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/* Warte auf 802.11p Frames */
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wifi_promiscuous_pkt_t *pkt = NULL;
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/* Frame empfangen und decodieren */
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if (wifi_promiscuous_get_pkt(&pkt) == ESP_OK) {
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v2x_frame_t frame;
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/* BSM/CAM/DENM Header decodieren */
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frame.msg_type = pkt->ctrl & 0x0F;
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frame.channel = V2X_CHANNEL_NUMBER;
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frame.frequency_mhz = V2X_FREQUENCY_MHZ;
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frame.rssi_dbm = pkt->rssi;
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frame.power_dbm = pkt->power;
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frame.data_rate_bps = 12000000; // 12 Mbps
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frame.frame_len = pkt->len;
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/* In V2X-Datenbank speichern */
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v2x_db_insert(&frame);
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/* Debug-Ausgabe */
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ESP_LOGI(TAG, "V2X: %s CH=%d RSSI=%d dBm",
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frame.msg_type == BSM_ID_SPAT ? "BSM" :
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frame.msg_type == CAM_CONTAINER_TYPE ? "CAM" : "DENM",
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frame.channel, frame.rssi_dbm);
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/* ====== Promiscuous RX Callback ====== */
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static void v2x_promiscuous_cb(void *arg, wifi_promiscuous_pkt_type_t pkt_type)
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{
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(void)arg;
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(void)pkt_type;
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wifi_promiscuous_pkt_t *pkt = (wifi_promiscuous_pkt_t *)arg;
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if (!pkt || !pkt->payload) return;
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/* Frame erstellen */
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v2x_frame_t frame;
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memset(&frame, 0, sizeof(frame));
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/* Timestamp */
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frame.timestamp_us = (uint64_t)esp_timer_get_time();
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/* Metadaten */
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frame.rssi_dbm = pkt->rx_ctrl->rssi;
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frame.noise_dbm = pkt->rx_ctrl->noise_floor;
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frame.rate_index = pkt->rx_ctrl->rate;
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frame.frame_len = pkt->packet_length;
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/* Aktuelle Frequenz (wird vom Channel Hopper gesetzt) */
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extern uint32_t g_v2x_current_freq;
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frame.frequency_mhz = (float)g_v2x_current_freq;
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/* MAC-Adresse extrahieren (802.11 Header) */
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if (pkt->packet_length >= 30) {
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uint8_t *mac = pkt->payload;
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/* BSSID: Bytes 10-15, Source: Bytes 16-21 */
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memcpy(frame.bssid, mac + 10, 6);
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memcpy(frame.mac_addr, mac + 16, 6);
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}
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/* Rohdaten (ab 802.11 Header + LLC) */
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uint16_t v2x_offset = 24;
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if (pkt->packet_length > v2x_offset) {
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frame.raw_len = pkt->packet_length - v2x_offset;
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if (frame.raw_len > V2X_MAX_FRAME_LEN) {
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frame.raw_len = V2X_MAX_FRAME_LEN;
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}
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memcpy(frame.raw_data, pkt->payload + v2x_offset, frame.raw_len);
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vTaskDelay(10 / portTICK_PERIOD_MS);
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/* Message-Type */
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frame.msg_type = detect_msg_type(frame.raw_data, frame.raw_len);
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}
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/* Auf Queue pushen (non-blocking) */
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if (xQueueSendFromISR(s_frame_queue, &frame, NULL) != pdTRUE) {
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static uint64_t last_overflow = 0;
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if (esp_timer_get_time() - last_overflow > 1000000) {
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ESP_LOGW(TAG, "Frame Queue voll, Frame verworfen");
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last_overflow = esp_timer_get_time();
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}
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}
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}
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/**
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* Application entry point
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*/
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void app_main(void) {
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ESP_LOGI(TAG, "V2X-Sniffer Firmware gestartet");
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/* NVS initialisieren */
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nvs_flash_init();
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/* WiFi initialisieren */
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/* ====== Frame Writer Task ====== */
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static void v2x_frame_writer_task(void *pvParameters)
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{
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v2x_frame_t frame;
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uint32_t flush_counter = 0;
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while (1) {
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/* Warte auf Frame in Queue */
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if (xQueueReceive(s_frame_queue, &frame, pdMS_TO_TICKS(500)) == pdTRUE) {
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/* Auf SD schreiben */
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esp_err_t ret = v2x_sd_write_frame(&frame);
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if (ret != ESP_OK) {
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ESP_LOGW(TAG, "SD-Schreibfehler");
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}
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/* Periodisch flushen */
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flush_counter++;
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if (flush_counter % CSV_FLUSH_INTERVAL == 0) {
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/* CSV-Datei flushen */
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FILE *fp = fopen(SD_CSV_FILE, "r");
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if (fp) {
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fflush(fp);
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fclose(fp);
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}
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}
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}
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}
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}
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/* ====== Channel Hopper Task ====== */
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uint32_t g_v2x_current_freq = 5900;
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static void v2x_channel_hopper_task(void *pvParameters)
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{
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uint8_t hop_idx = 0;
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ESP_LOGI(TAG, "Channel Hopper gestartet (jedes %d Sekunden)", CHANNEL_HOP_INTERVAL_MS / 1000);
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while (1) {
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uint32_t freq = v2x_freqs[hop_idx % V2X_NUM_CHANNELS];
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/* Frequenz/Kanal wechseln */
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v2x_phy_init(freq);
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g_v2x_current_freq = freq;
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ESP_LOGI(TAG, "CH %d: %lu MHz", hop_idx, (unsigned long)freq);
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hop_idx++;
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vTaskDelay(pdMS_TO_TICKS(CHANNEL_HOP_INTERVAL_MS));
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}
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}
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/* ====== Statistik Task ====== */
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static void v2x_stats_task(void *pvParameters)
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{
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ESP_LOGI(TAG, "Statistik-Task gestartet");
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while (1) {
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if (s_frame_queue) {
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v2x_sd_dump_stats();
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/* Queue-Status */
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uint32_t queue_free = uxQueueMessagesWaiting(s_frame_queue);
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uint32_t queue_items = FRAME_QUEUE_SIZE - queue_free;
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ESP_LOGI(TAG, "Queue: %lu/%lu Frames wartend", (unsigned long)queue_items, (unsigned long)FRAME_QUEUE_SIZE);
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}
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vTaskDelay(pdMS_TO_TICKS(STAT_DUMP_INTERVAL_MS));
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}
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}
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/* ====== Application Entry Point ====== */
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void app_main(void)
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{
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ESP_LOGI(TAG, "=======================================");
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ESP_LOGI(TAG, "V2X-Sniffer Firmware für ESP32-C5");
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ESP_LOGI(TAG, "802.11p V2X-Band (5.9 GHz) | SD-Karte");
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ESP_LOGI(TAG, "Vollständig autonom - kein Host-PC");
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ESP_LOGI(TAG, "=======================================");
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/* === NVS initialisieren === */
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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_LOGW(TAG, "NVS bereinigen...");
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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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/* === WiFi initialisieren === */
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esp_netif_init();
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esp_event_loop_create_default();
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wifi_init_config_t cfg = WIFI_INIT_CONFIG_DEFAULT();
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esp_wifi_init(&cfg);
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/* V2X PHY initialisieren */
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v2x_phy_init();
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/* Promiscuous Mode für Sniffing aktivieren */
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/* WiFi Station Mode (für WiFi-Manager falls needed) */
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esp_wifi_set_mode(WIFI_MODE_STA);
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esp_wifi_start();
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/* === SD-Karte initialisieren === */
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ESP_LOGI(TAG, "Initialisiere SD-Karte (GPIO6/7/2/23)...");
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ret = v2x_sd_init();
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if (ret != ESP_OK) {
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ESP_LOGE(TAG, "SD-Karte fehlgeschlagen: %s", esp_err_to_name(ret));
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ESP_LOGW(TAG, "Fahre ohne SD-Karte fort (Daten gehen verloren)");
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} else {
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/* CSV-Header schreiben */
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FILE *fp = fopen(SD_CSV_FILE, "a+");
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if (fp) {
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fprintf(fp, "%s\n", CSV_HEADER);
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fclose(fp);
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ESP_LOGI(TAG, "CSV-Header geschrieben: %s", SD_CSV_FILE);
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}
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}
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/* === Frame Queue erstellen === */
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s_frame_queue = xQueueCreate(FRAME_QUEUE_SIZE, sizeof(v2x_frame_t));
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if (!s_frame_queue) {
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ESP_LOGE(TAG, "Frame Queue konnte nicht erstellt werden");
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while (1) vTaskDelay(1000 / portTICK_PERIOD_MS);
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}
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/* === Stats initialisieren === */
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v2x_sd_reset_stats();
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/* === Tasks starten === */
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/* Channel Hopper */
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xTaskCreate(v2x_channel_hopper_task, "channel_hopper", 4096, NULL, 3, NULL);
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/* Frame Writer */
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xTaskCreate(v2x_frame_writer_task, "frame_writer", 4096, NULL, 6, NULL);
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/* Statistik */
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xTaskCreate(v2x_stats_task, "stats_task", 2048, NULL, 2, NULL);
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/* === Promiscuous Mode aktivieren === */
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wifi_promiscuous_filter_t filter = {
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.mask = (1 << WIFI_PROMIS_FILTER_MASK_DATA) |
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(1 << WIFI_PROMIS_FILTER_MASK_MGMT) |
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(1 << WIFI_PROMIS_FILTER_MASK_CTRL),
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};
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esp_wifi_set_promiscuous_filter(&filter);
|
||||
esp_wifi_set_promiscuous_rx_cb(v2x_promiscuous_cb);
|
||||
esp_wifi_set_promiscuous(true);
|
||||
esp_wifi_set_promiscuous_rx_cb([](void *arg, wifi_promiscuous_pkt_t *pkt) {
|
||||
vTaskNotifyGiveFromISR(v2x_sniffer_handle, pdTRUE);
|
||||
});
|
||||
|
||||
/* V2X-Datenbank initialisieren */
|
||||
v2x_db_init();
|
||||
|
||||
/* V2X-Sniffer Task starten */
|
||||
xTaskCreate(v2x_sniffer_task, "v2x_sniffer", 4096, NULL, 5, NULL);
|
||||
|
||||
ESP_LOGI(TAG, "✓ V2X-Sniffer bereit!");
|
||||
|
||||
ESP_LOGI(TAG, "=======================================");
|
||||
ESP_LOGI(TAG, "✓ V2X-Sniffer BEREIT!");
|
||||
ESP_LOGI(TAG, " SD: %s", SD_CARD_MOUNT_POINT);
|
||||
ESP_LOGI(TAG, " CSV: %s", SD_CSV_FILE);
|
||||
ESP_LOGI(TAG, " Log: %s", SD_LOG_FILE);
|
||||
ESP_LOGI(TAG, " Kanal: 157-164 + 17/18");
|
||||
ESP_LOGI(TAG, " Hop: %d Sekunden", CHANNEL_HOP_INTERVAL_MS / 1000);
|
||||
ESP_LOGI(TAG, " Format: v2x_frames.csv (Excel/CSV-kompatibel)");
|
||||
ESP_LOGI(TAG, " Rotation: >50MB automatisch");
|
||||
ESP_LOGI(TAG, "=======================================");
|
||||
}
|
||||
|
||||
Reference in New Issue
Block a user