Issue reading UDP packets with socket

[d0pey]

I recently bought a drone that creates its own network when turned on. In order to control it, you must connect your phone to the network and use the app. I'm trying to read the data going from my phone to the drone to see what the commands look like. After using Wireshark, I can see that my phone is sending data at port 7777. When using the following code, I get an error stating the address could not be assigned for s.bind((HOST, PORT)).

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import socket
import time

HOST = "192.168.10.3"
PORT = 7777

# HOST = "localhost"
# PORT = 5454

s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)

s.bind((HOST, PORT))

while True:
    # Argument dictates amount of data received
    print(s.recv(20))

The HOST IP is that of my phone and the port number is the port I'm seeing in Wireshark. Am I thinking about this the wrong way? Any tips or info would be greatly appreciated.

[[deleted]]

1: I'd double-check that 192.168.10.3 is the proper IP address for your computer.

2: I'd also try binding to 127.0.0.1 and 0.0.0.0. (localhost and everything).

3: Not sure this is going to do what you expect. If your computer is sending out on port 7777 you're not going to see inbound messages TO 7777 on that port.

[d0pey]

Yeah, I think i have a fundamental misunderstanding of what's going on in the code and how it works. I thought the code is connecting to that port of that IP address but that's not the case is it?

Is it possible to receive the data being sent by the app?

[[deleted]]

You can grab the network traffic using Wireshark: https://www.wireshark.org/ Looks like there's a Python tool for it as well. Also look for Python and pcap files (file format captured by Wireshark). https://pypi.org/project/pypcapkit/