Sniffign in Monitor Mode on Windows Throws Exception - libpcap & WLanHelper path issue

[FrequenzForce]

Brief description

On a windows machine, with scapy 2.5.0 and npcap 1.79, when calling sniff like this:

a=sniff(iface="Valid Wifi Interface Name",monitor=True,count=5)

Scapy throws an exception due to a path formulation error for WLanHelper.

Scapy version

2.5

Python version

3.12

Operating system

Windows LATEST

Additional environment information

pip show scapy

Name: scapy Version: 2.5.0 Summary: Scapy: interactive packet manipulation tool Home-page: https://scapy.net Author: Philippe BIONDI Author-email: [email protected] License: GPL-2.0-only Location: C:\Users\user\AppData\Local\Programs\Python\Python312\Lib\site-packages Requires: Required-by:

How to reproduce

• Install scapy 2.5 per docs
• Install npcap 1.79
• Call "sniff" - either interactively or in code - sniff(iface="Valid Wifi Interface Name",monitor=True,count=5)

Actual result

'\WlanHelper.exe' is not recognized as an internal or external command, operable program or batch file. Traceback (most recent call last): File "", line 1, in File "C:\Users\user\AppData\Local\Programs\Python\Python312\Lib\site-packages\scapy\sendrecv.py", line 1311, in sniff sniffer.run(*args, **kwargs) File "C:\Users\user\AppData\Local\Programs\Python\Python312\Lib\site-packages\scapy\sendrecv.py", line 1171, 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 481, in init fd = open_pcap( ^^^^^^^^^^ File "C:\Users\user\AppData\Local\Programs\Python\Python312\Lib\site-packages\scapy\arch\windows_init.py", line 766, in open_pcap monitored = iface.ismonitor() ^^^^^^^^^^^^^^^^^ File "C:\Users\user\AppData\Local\Programs\Python\Python312\Lib\site-packages\scapy\arch\windows_init.py", line 413, in ismonitor res = (self.mode() == "monitor") ^^^^^^^^^^^ File "C:\Users\user\AppData\Local\Programs\Python\Python312\Lib\site-packages\scapy\arch\windows_init.py", line 404, in mode return self.npcap_get("mode") ^^^^^^^^^^^^^^^^^^^^^^^ File "C:\Users\user\AppData\Local\Programs\Python\Python312\Lib\site-packages\scapy\arch\windows_init.py", line 396, in _npcap_get raise OSError(res.decode("utf8", errors="ignore")) OSError

Expected result

<Sniffed: TCP:0 UDP:0 ICMP:0 Other:5>

Related resources

No response