Hello,
Hardware specification: ESP32 Dev kit (Wroom).
And using ESP-MDF.
Details:
1. In promiscuous mode, the data sniffed will have a structure of header and payload.
2. If you extract this payload, you will get the WiFi data frame. This in turn have a header and payload.
3. If you extract this payload, you will get the ESP-Mesh packet. This is basically your WIFI IEEE80211 PACKET-NETWORK DATA This will
also have a header and payload which is created by ESP-MDF.
4. Our interest is this ESP-MESH header which will have the initial source MAC and final destination MAC address
So once you are able to read WIFI IEEE80211 PACKET-NETWORK DATA it will contain the ESP-MESH header.
Question:
1. Is the above understanding is correct?
2. How to decode/extract payload(PACKET-NETWORK DATA) to readable format?
Thanks for the answers
Best,
Rajkumar
WiFi Packet Capture Using Sniffer in ESP32
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- Posts: 18
- Joined: Fri May 28, 2021 10:58 am
Re: WiFi Packet Capture Using Sniffer in ESP32
Hi,
Your understanding is correct to extract that information you can create your own struct by looking into 802.11 standard as per your desired frame.
Take a look at this one, this repo can help you:
https://github.com/skywa04885/esp32-pac ... eee80211.h
Your understanding is correct to extract that information you can create your own struct by looking into 802.11 standard as per your desired frame.
Take a look at this one, this repo can help you:
https://github.com/skywa04885/esp32-pac ... eee80211.h
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- Posts: 18
- Joined: Fri May 28, 2021 10:58 am
Re: WiFi Packet Capture Using Sniffer in ESP32
Hi prateekn9,
Thank you so much for the answer. We will try it out. Fingers crossed! And also some other solutions are welcomed.
Thank you so much for the answer. We will try it out. Fingers crossed! And also some other solutions are welcomed.
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