krackattacks/tests/hwsim/test_mbo.py

# MBO tests
# Copyright (c) 2016, Intel Deutschland GmbH
#
# This software may be distributed under the terms of the BSD license.
# See README for more details.

import logging
logger = logging.getLogger()

import hostapd
import os

from tshark import run_tshark

def test_mbo_assoc_disallow(dev, apdev, params):
    hapd1 = hostapd.add_ap(apdev[0]['ifname'], { "ssid": "MBO", "mbo": "1" })
    hapd2 = hostapd.add_ap(apdev[1]['ifname'], { "ssid": "MBO", "mbo": "1" })

    logger.debug("Set mbo_assoc_disallow with invalid value")
    if "FAIL" not in hapd1.request("SET mbo_assoc_disallow 2"):
	raise Exception("Set mbo_assoc_disallow for AP1 succeeded unexpectedly with value 2")

    logger.debug("Disallow associations to AP1 and allow association to AP2")
    if "OK" not in hapd1.request("SET mbo_assoc_disallow 1"):
	raise Exception("Failed to set mbo_assoc_disallow for AP1")
    if "OK" not in hapd2.request("SET mbo_assoc_disallow 0"):
	raise Exception("Failed to set mbo_assoc_disallow for AP2")

    dev[0].connect("MBO", key_mgmt="NONE", scan_freq="2412")

    out = run_tshark(os.path.join(params['logdir'], "hwsim0.pcapng"),
		     "wlan.fc.type == 0 && wlan.fc.type_subtype == 0x00",
                     wait=False)
    if "Destination address: " + hapd1.own_addr() in out:
	raise Exception("Association request sent to disallowed AP")

    timestamp = run_tshark(os.path.join(params['logdir'], "hwsim0.pcapng"),
                           "wlan.fc.type_subtype == 0x00",
                           display=['frame.time'], wait=False)

    logger.debug("Allow associations to AP1 and disallow assications to AP2")
    if "OK" not in hapd1.request("SET mbo_assoc_disallow 0"):
	raise Exception("Failed to set mbo_assoc_disallow for AP1")
    if "OK" not in hapd2.request("SET mbo_assoc_disallow 1"):
	raise Exception("Failed to set mbo_assoc_disallow for AP2")

    dev[0].request("DISCONNECT")
    dev[0].wait_disconnected()

    # Force new scan, so the assoc_disallowed indication is updated */
    dev[0].request("FLUSH")

    dev[0].connect("MBO", key_mgmt="NONE", scan_freq="2412")

    filter = 'wlan.fc.type == 0 && wlan.fc.type_subtype == 0x00 && frame.time > "' + timestamp.rstrip() + '"'
    out = run_tshark(os.path.join(params['logdir'], "hwsim0.pcapng"),
                     filter, wait=False)
    if "Destination address: " + hapd2.own_addr() in out:
	raise Exception("Association request sent to disallowed AP 2")