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tests: Make ap_max_num_sta_no_probe_resp more robust

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It was possible for the AP's Beacon frame to be seen by dev[0] when
running a scan. This is not an error case. Make this test case more
robust by verifying with a sniffer whether a Probe Response frame was
sent to unexpected STA.

Signed-off-by: Jouni Malinen <j@w1.fi>
This commit is contained in:
Jouni Malinen 2015-12-06 13:35:40 +02:00
parent 58059e6c0c
commit bc321e1597
1 changed files with 17 additions and 3 deletions
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20
tests/hwsim/test_ap_params.py
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@ -6,10 +6,12 @@
import logging import logging
logger = logging.getLogger() logger = logging.getLogger()
import os
import subprocess import subprocess
import hwsim_utils import hwsim_utils
import hostapd import hostapd
from tshark import run_tshark
def test_ap_fragmentation_rts_set_high(dev, apdev): def test_ap_fragmentation_rts_set_high(dev, apdev):
"""WPA2-PSK AP with fragmentation and RTS thresholds larger than frame length""" """WPA2-PSK AP with fragmentation and RTS thresholds larger than frame length"""
@ -249,8 +251,9 @@ def test_ap_max_num_sta(dev, apdev):
if ev is not None: if ev is not None:
raise Exception("Unexpected association") raise Exception("Unexpected association")
def test_ap_max_num_sta_no_probe_resp(dev, apdev): def test_ap_max_num_sta_no_probe_resp(dev, apdev, params):
"""Maximum STA count and limit on Probe Response frames""" """Maximum STA count and limit on Probe Response frames"""
logdir = params['logdir']
dev[0].flush_scan_cache() dev[0].flush_scan_cache()
ssid = "max" ssid = "max"
params = {} params = {}
@ -262,9 +265,20 @@ def test_ap_max_num_sta_no_probe_resp(dev, apdev):
dev[1].connect(ssid, key_mgmt="NONE", scan_freq="2412") dev[1].connect(ssid, key_mgmt="NONE", scan_freq="2412")
dev[0].scan(freq=2412, type="ONLY") dev[0].scan(freq=2412, type="ONLY")
dev[0].scan(freq=2412, type="ONLY") dev[0].scan(freq=2412, type="ONLY")
if dev[0].get_bss(apdev[0]['bssid']) != None: seen = dev[0].get_bss(apdev[0]['bssid']) != None
raise Exception("AP found unexpectedly")
dev[1].scan(freq=2412, type="ONLY") dev[1].scan(freq=2412, type="ONLY")
if seen:
out = run_tshark(os.path.join(logdir, "hwsim0.pcapng"),
"wlan.fc.type_subtype == 5", ["wlan.da" ])
if out:
if dev[0].own_addr() not in out:
# Discovery happened through Beacon frame reception. That's not
# an error case.
seen = False
if dev[1].own_addr() not in out:
raise Exception("No Probe Response frames to dev[1] seen")
if seen:
raise Exception("AP found unexpectedly")
def test_ap_tx_queue_params(dev, apdev): def test_ap_tx_queue_params(dev, apdev):
"""Open AP with TX queue params set""" """Open AP with TX queue params set"""