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I want to know how to execute the WlanScan function from python to initiate a wireless network scan. I am using python module win32wifi. It requires a handle obtained using WlanOpenHandle and an interface GUID pInterfaceGuid. I have no idea how to get this GUID. any help would be appreciated.

How do I get this pInterfaceGuid

HaMAD
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2 Answers2

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You get the Guid with WlanEnumInterfaces which returns WLAN_INTERFACE_INFO_LIST structure with WLAN_INTERFACE_INFO structure and InterfaceGuid member

Castorix
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  • I have read this documentation. How do I access the InterfaceGuid member ? – HaMAD Jun 21 '19 at 10:42
  • You can find Python samples on Google with those keywords. For example :[Wifi python](https://fraoustin.fr/old/python_wifi.html) – Castorix Jun 21 '19 at 11:15
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I installed the Win32WiFi module and after a brief check of URLs provided by @Castorix (all required info can be found at [MS.Docs]: wlanapi.h header), and the source code, I was able to write this small example.

code00.py:

#!/usr/bin/env python3

import sys

from win32wifi import Win32Wifi as ww


def main(*argv):
    interfaces = ww.getWirelessInterfaces()
    print("WLAN Interfaces: {:d}".format(len(interfaces)))
    handle = ww.WlanOpenHandle()
    for idx , interface in enumerate(interfaces):
        print("\n  {:d}\n  GUID: [{:s}]\n  Description: [{:s}]".format(idx, interface.guid_string, interface.description))
        try:
            scan_result = ww.WlanScan(handle, interface.guid)
        except:
            print(sys.exc_info())
            continue
        print("\n  Scan result: {:d}".format(scan_result))
    ww.WlanCloseHandle(handle)


if __name__ == "__main__":
    print("Python {:s} {:03d}bit on {:s}\n".format(" ".join(elem.strip() for elem in sys.version.split("\n")),
                                                   64 if sys.maxsize > 0x100000000 else 32, sys.platform))
    rc = main(*sys.argv[1:])
    print("\nDone.")
    sys.exit(rc)

Output:

[cfati@CFATI-5510-0:e:\Work\Dev\StackOverflow\q056701614]> "e:\Work\Dev\VEnvs\py_pc064_03.07.06_test0\Scripts\python.exe" code00.py
Python 3.7.6 (tags/v3.7.6:43364a7ae0, Dec 19 2019, 00:42:30) [MSC v.1916 64 bit (AMD64)] 064bit on win32

WLAN Interfaces: 1

  0
  GUID: [{0C58E048-BC0B-4D5F-A21F-FCD4E4B31806}]
  Description: [Intel(R) Dual Band Wireless-AC 8260]

  Scan result: 0

Done.

Update #0

Updated the code according to [SO]: Unable to get all available networks using WlanGetAvailableNetworkList in Python (@CristiFati's answer). It will now work for computers that have more than one WLAN adapter.

CristiFati
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  • This works. Thank you. Can you tell me why we can't index this array. – HaMAD Jun 21 '19 at 11:38
  • What do you mean? Which array can't be indexed? I am able to index it: `interfaces.InterfaceInfo[i]`. – CristiFati Jun 21 '19 at 11:43
  • I'm getting an error while using the above logic on getting list of available networks. only 0 index works others dont work even if there are more networks accoring to `NumberOfItems` – HaMAD Jun 21 '19 at 12:13
  • I'm getting an error while using the above logic on getting list of available networks. only 0 index works others dont work even if there are more networks accoring to `NumberOfItems` – HaMAD Jun 21 '19 at 12:13
  • **Those are not available networks**, but *WLAN* interfaces on your computer (typically each computer has (a physical) one). How many do you say are on yours? What's the output on your computer? – CristiFati Jun 21 '19 at 12:22
  • I understand that the code above is for interfaces and not for networks. I tried to translate the same logic to show available networks. using `WlanGetAvailableNetworkList` and iterating over the `Network` object found within it. The issue is no matter what the `NumberOfItems` is I can only print the first network and can't go beyond that. – HaMAD Jun 21 '19 at 12:28
  • You should add your code to the question. Note that what you're asking now is different than the original question. – CristiFati Jun 21 '19 at 12:31
  • Let us [continue this discussion in chat](https://chat.stackoverflow.com/rooms/195345/discussion-between-hamad-and-cristifati). – HaMAD Jun 21 '19 at 12:32