Cannot launch Scapy on Windows 11 with monitor mode enabled

[alexis-opolka]

Brief description

When we try to launch sniff() on Windows 11 with the monitor mode enabled, we only get a OSError: Generic Error

Scapy version

https://github.com/secdev/scapy.git@3cbb62e04637f686867f9693275c14be938a229f

Python version

Python 3.12.8

Operating system

Microsoft Windows 11 [Version 10.0.26100.2605]

Additional environment information

Npcap was installed with only raw 802.11 support (and monitor mode).

How to reproduce

from scapy.all import sniff

if __name__ == "__main__":

    try:
        packets = sniff(iface="Ethernet", count=4, filter="arp", monitor=True)

    except OSError as e:
        print("OSError:", e)
        exit(1)

Actual result

The unhandled code will print out this traceback:

Traceback (most recent call last):
  File "C:\Users\<user>\Documents\depots\sae-501\issues\scapy_win_oserror.py", line 5, in <module>
    packets = sniff(iface="Ethernet", count=4, filter="arp", monitor=True)
              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\<user>\AppData\Local\Programs\Python\Python312\Lib\site-packages\scapy\sendrecv.py", line 1424, in sniff
    sniffer._run(*args, **kwargs)
  File "C:\Users\<user>\AppData\Local\Programs\Python\Python312\Lib\site-packages\scapy\sendrecv.py", line 1273, in _run
    sniff_sockets[_RL2(iface)(type=ETH_P_ALL, iface=iface,
                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\<user>\AppData\Local\Programs\Python\Python312\Lib\site-packages\scapy\arch\libpcap.py", line 530, in __init__
    fd = open_pcap(
         ^^^^^^^^^^
  File "C:\Users\<user>\AppData\Local\Programs\Python\Python312\Lib\site-packages\scapy\arch\windows\__init__.py", line 784, in open_pcap
    return _orig_open_pcap(iface_network_name, *args, **kargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\<user>\AppData\Local\Programs\Python\Python312\Lib\site-packages\scapy\arch\libpcap.py", line 366, in __init__
    raise OSError(errmsg)
OSError: Generic error

N.B. The user name has been omitted.

Expected result

No unhandled error + the packets from my network.

Related resources

No response