Resolving LoadLibrary Error for Cross-Platform Compatibility

[BinomeDeNewton]

Resolving LoadLibrary Error for Cross-Platform Compatibility

[guedou]

Thanks for the report. Can you test your issue against master? Also, which version of macOS are you using?

[BinomeDeNewton]

I entered these commands to install scapy from Github instead of using pip:

git clone https://github.com/secdev/scapy
cd scapy
./run_scapy
bt = BluetoothHCISocket(0)

I encountered this error:

Traceback (most recent call last):
  File "<console>", line 1, in <module>
  File "/Users/.../Developer/scapy/scapy/layers/bluetooth.py", line 2506, in __init__
    s = socket.socket(socket.AF_BLUETOOTH, socket.SOCK_RAW, socket.BTPROTO_HCI)  # noqa: E501
                      ^^^^^^^^^^^^^^^^^^^
AttributeError: module 'socket' has no attribute 'AF_BLUETOOTH'

Indeed, macOS does not support AF_BLUETOOTH in Python's socket module. To work with Bluetooth in programming on macOS, you will need to use macOS-specific libraries or command-line tools like bluetoothctl (on Linux) or macOS-specific low-level programming interfaces. A good solution would be to use the PyBluez library.

So, I am applying some modifications in the code on my Mac (version : 14.2.1 (23C71)).

[guedou]

Could you show us your modifications? I don't understand if you modified Scapy to stop the exception from happening or if you added Bluetooth support on macOS.

[BinomeDeNewton]

I found a way to address the issue with the libc library that Scapy encountered when running on a Mac. The core issue was Scapy's attempt to load libc.so.6, which is specific to Linux systems, while macOS uses libc.dylib.

I implemented a conditional import based on the operating system. This solution utilizes the platform module to dynamically determine the operating system at runtime and then load the appropriate C library. For Linux, it continues to load libc.so.6, and for macOS, it switches to loading libc.dylib.

import platform
import ctypes

ctypes.cdll.LoadLibrary("libc.{}".format("so.6" if platform.system() != "Darwin" else "dylib"))
libc = ctypes.CDLL("libc.{}".format("so.6" if platform.system() != "Darwin" else "dylib"))

As for the socket.AF_BLUETOOTH issue on macOS, I'm currently exploring solutions and considering alternatives like PyBluez.

[gpotter2]

You said that already.