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Incorrect Exception when linktype conflict with filter #4587
Description
Activity
reproduce step:
from scapy.sendrecv import AsyncSniffer import time count = 0 sniffer = AsyncSniffer(iface='eth0', filter='wlan type mgt subtype deauth') sniffer.start() time.sleep(1) sniffer.stop() print(f'success {count}')
expect result is
raise Scapy_Exception(scapy.error.Scapy_Exception: Cannot set filter
real result is
raise Scapy_Exception(scapy.error.Scapy_Exception: Unsupported (offline or unsupported socket)Reacted by Mo_- changed the title
[-]code blocked at `compile_filter` in scapy[/-][+]Incorrect Exception when linktype conflict with filter[/+]on Nov 11, 2024 This also hit me, when I had a typo in the filter:
sniffy = AsyncSniffer(iface="wlp0s20f3", filter="not arpand not port 22")See: https://stackoverflow.com/q/79766638/21826195
Took some time to figure it out, because the same error also arises from timing issues: https://stackoverflow.com/q/70559382/21826195
- added a commit that references this issue
on Jun 22, 2026 - added a commit that references this issue
on Jun 27, 2026
Brief description
when I using Asnysniffer with filter, sometime the program will blocked at
compile_filter, then when I stop Asynsniffer, there is no attributestop_cb.Scapy version
2.6.0
Python version
3.11
Operating system
ubuntu 20.04
Additional environment information
No response
How to reproduce
Actual result
have no attribute
stop_cbExpected result
have no error when finished sniffer capture
Related resources
No response