Problem with packet capture

[failman34]

Board

ESP32

Device Description

ESP32-DevKitC

Hardware Configuration

Version

v3.1.0

IDE Name

Arduino IDE

Operating System

Windows 11

Flash frequency

80Mhz

PSRAM enabled

yes

Upload speed

921600

Description

I'm using esp32 to capture WiFi packets. I manage to capture all packets and even EAPOL, from which the password is easily derived. However, when trying to decrypt Data packets nothing comes out. As I understand it they are garbled or cut off. Is there any way around this. also under each beacon packet wireshark gives the warning [Malformed Packet: IEEE 802.11: length of containing item exceeds length of containing item].
I use this library

Sketch

/*
  ===========================================
       Copyright (c) 2017 Stefan Kremser
              github.com/spacehuhn
  ===========================================
*/

#include "freertos/FreeRTOS.h"
#include "esp_wifi.h"

#include "esp_event.h"

#include "nvs_flash.h"

#include <Arduino.h>
#include <TimeLib.h>
#include "FS.h"
#include "SD.h"
#include "SPI.h"
#include <PCAP.h>

#define CHANNEL 13
#define BAUD_RATE 921600
#define CHANNEL_HOPPING false //if true it will scan on all channels
#define MAX_CHANNEL 11 //(only necessary if channelHopping is true)
#define HOP_INTERVAL 214 //in ms (only necessary if channelHopping is true)

PCAP pcap = PCAP();
int ch = CHANNEL;
unsigned long lastChannelChange = 0;

static wifi_country_t wifi_country = {.cc="CN", .schan = 1, .nchan = 13}; //Most recent esp32 library struct


/* will be executed on every packet the ESP32 gets while beeing in promiscuous mode */
void sniffer(void *buf, wifi_promiscuous_pkt_type_t type){
  wifi_promiscuous_pkt_t* pkt = (wifi_promiscuous_pkt_t*)buf;
  
  pcap.newPacketSerial(pkt->rx_ctrl.timestamp / 1000000U, pkt->rx_ctrl.timestamp % 1000000U, pkt->rx_ctrl.sig_len, pkt->payload); //send packet via Serial  
}

// esp_err_t event_handler(void *ctx, arduino_event_t *event) {
//     return ESP_OK;
// }


void setup() {


  Serial.begin(BAUD_RATE);
  delay(2000);
  Serial.println();
  
  
  nvs_flash_init();
  wifi_init_config_t cfg = WIFI_INIT_CONFIG_DEFAULT();
  esp_wifi_init(&cfg);
  esp_wifi_set_country(&wifi_country);
  esp_wifi_set_storage(WIFI_STORAGE_RAM);
  esp_wifi_set_mode(WIFI_MODE_AP); 
  esp_wifi_start();

  Serial.println("<<START>>");
  pcap.startSerial();
  esp_wifi_set_channel(ch, WIFI_SECOND_CHAN_NONE);
  esp_wifi_set_promiscuous(true);
  esp_wifi_set_promiscuous_rx_cb(sniffer);

 
}

void loop() {
  
  
}

Debug Message

-

Other Steps to Reproduce

No response

I have checked existing issues, online documentation and the Troubleshooting Guide

• I confirm I have checked existing issues, online documentation and Troubleshooting guide.