Is passive scanning implemented in the Linux backend?

• bleak version: 0.12.1
• Python version: 3.8.10
• Operating System: Ubuntu 20.04.2 LTS
• BlueZ version (bluetoothctl -v) in case of Linux: 5.53

Description

I wanted to do a passive scan with Bleak. Issue https://github.com/hbldh/bleak/issues/500 seemed to suggest that this is possible with the keyword argument scanning_mode='passive' to the BleakScanner constructor. So I added this argument while initializing the BleakScanner. However, Wireshark still shows me SCAN_REQ packets coming from my computer and SCAN_RSP packets as replies from my BLE devices, which suggests that Bleak is still doing an active scan.

What I Did

My Minimal Workable Example is:

import asyncio
from bleak import BleakScanner


async def run():
    devices = await BleakScanner(scanning_mode='passive').discover()
    for device in devices:
        print(device)


loop = asyncio.get_event_loop()
loop.run_until_complete(run())

[balloob]

I sent you an email 👍

[dlech]

If a company that uses Bleak want to sponsor me to take a week off of work, I can have a go at it.