mirror of
https://github.com/vanhoefm/fragattacks.git
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275 lines
11 KiB
Python
275 lines
11 KiB
Python
# Scanning tests
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# Copyright (c) 2013, Jouni Malinen <j@w1.fi>
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#
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# This software may be distributed under the terms of the BSD license.
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# See README for more details.
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import time
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import logging
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logger = logging.getLogger()
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import os
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import subprocess
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import hostapd
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def check_scan(dev, params, other_started=False):
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if not other_started:
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dev.dump_monitor()
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id = dev.request("SCAN " + params)
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if "FAIL" in id:
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raise Exception("Failed to start scan")
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id = int(id)
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if other_started:
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ev = dev.wait_event(["CTRL-EVENT-SCAN-STARTED"])
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if ev is None:
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raise Exception("Other scan did not start")
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if "id=" + str(id) in ev:
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raise Exception("Own scan id unexpectedly included in start event")
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ev = dev.wait_event(["CTRL-EVENT-SCAN-RESULTS"])
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if ev is None:
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raise Exception("Other scan did not complete")
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if "id=" + str(id) in ev:
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raise Exception("Own scan id unexpectedly included in completed event")
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ev = dev.wait_event(["CTRL-EVENT-SCAN-STARTED"])
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if ev is None:
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raise Exception("Scan did not start")
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if "id=" + str(id) not in ev:
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raise Exception("Scan id not included in start event")
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ev = dev.wait_event(["CTRL-EVENT-SCAN-RESULTS"])
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if ev is None:
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raise Exception("Scan did not complete")
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if "id=" + str(id) not in ev:
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raise Exception("Scan id not included in completed event")
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def check_scan_retry(dev, params, bssid):
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for i in range(0, 5):
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check_scan(dev, "freq=2412-2462,5180 use_id=1")
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if int(dev.get_bss(bssid)['age']) <= 1:
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return
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raise Exception("Unexpectedly old BSS entry")
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def test_scan(dev, apdev):
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"""Control interface behavior on scan parameters"""
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hostapd.add_ap(apdev[0]['ifname'], { "ssid": "test-scan" })
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bssid = apdev[0]['bssid']
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logger.info("Full scan")
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check_scan(dev[0], "use_id=1")
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logger.info("Limited channel scan")
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check_scan_retry(dev[0], "freq=2412-2462,5180 use_id=1", bssid)
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# wait long enough to allow next scans to be verified not to find the AP
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time.sleep(2)
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logger.info("Passive single-channel scan")
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check_scan(dev[0], "freq=2457 passive=1 use_id=1")
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logger.info("Active single-channel scan")
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check_scan(dev[0], "freq=2452 passive=0 use_id=1")
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if int(dev[0].get_bss(bssid)['age']) < 2:
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raise Exception("Unexpectedly updated BSS entry")
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logger.info("Active single-channel scan on AP's operating channel")
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check_scan_retry(dev[0], "freq=2412 passive=0 use_id=1", bssid)
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def test_scan_only(dev, apdev):
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"""Control interface behavior on scan parameters with type=only"""
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hostapd.add_ap(apdev[0]['ifname'], { "ssid": "test-scan" })
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bssid = apdev[0]['bssid']
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logger.info("Full scan")
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check_scan(dev[0], "type=only use_id=1")
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logger.info("Limited channel scan")
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check_scan_retry(dev[0], "type=only freq=2412-2462,5180 use_id=1", bssid)
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# wait long enough to allow next scans to be verified not to find the AP
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time.sleep(2)
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logger.info("Passive single-channel scan")
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check_scan(dev[0], "type=only freq=2457 passive=1 use_id=1")
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logger.info("Active single-channel scan")
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check_scan(dev[0], "type=only freq=2452 passive=0 use_id=1")
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if int(dev[0].get_bss(bssid)['age']) < 2:
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raise Exception("Unexpectedly updated BSS entry")
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logger.info("Active single-channel scan on AP's operating channel")
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check_scan_retry(dev[0], "type=only freq=2412 passive=0 use_id=1", bssid)
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def test_scan_external_trigger(dev, apdev):
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"""Avoid operations during externally triggered scan"""
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hostapd.add_ap(apdev[0]['ifname'], { "ssid": "test-scan" })
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bssid = apdev[0]['bssid']
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subprocess.call(['sudo', 'iw', dev[0].ifname, 'scan', 'trigger'])
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check_scan(dev[0], "use_id=1", other_started=True)
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def test_scan_bss_expiration_count(dev, apdev):
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"""BSS entry expiration based on scan results without match"""
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if "FAIL" not in dev[0].request("BSS_EXPIRE_COUNT 0"):
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raise Exception("Invalid BSS_EXPIRE_COUNT accepted")
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if "OK" not in dev[0].request("BSS_EXPIRE_COUNT 2"):
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raise Exception("BSS_EXPIRE_COUNT failed")
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hapd = hostapd.add_ap(apdev[0]['ifname'], { "ssid": "test-scan" })
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bssid = apdev[0]['bssid']
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dev[0].scan(freq="2412", only_new=True)
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if bssid not in dev[0].request("SCAN_RESULTS"):
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raise Exception("BSS not found in initial scan")
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hapd.request("DISABLE")
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dev[0].scan(freq="2412", only_new=True)
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if bssid not in dev[0].request("SCAN_RESULTS"):
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raise Exception("BSS not found in first scan without match")
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dev[0].scan(freq="2412", only_new=True)
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if bssid in dev[0].request("SCAN_RESULTS"):
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raise Exception("BSS found after two scans without match")
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def test_scan_bss_expiration_age(dev, apdev):
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"""BSS entry expiration based on age"""
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try:
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if "FAIL" not in dev[0].request("BSS_EXPIRE_AGE COUNT 9"):
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raise Exception("Invalid BSS_EXPIRE_AGE accepted")
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if "OK" not in dev[0].request("BSS_EXPIRE_AGE 10"):
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raise Exception("BSS_EXPIRE_AGE failed")
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hapd = hostapd.add_ap(apdev[0]['ifname'], { "ssid": "test-scan" })
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bssid = apdev[0]['bssid']
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dev[0].scan(freq="2412")
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if bssid not in dev[0].request("SCAN_RESULTS"):
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raise Exception("BSS not found in initial scan")
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hapd.request("DISABLE")
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logger.info("Waiting for BSS entry to expire")
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time.sleep(7)
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if bssid not in dev[0].request("SCAN_RESULTS"):
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raise Exception("BSS expired too quickly")
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ev = dev[0].wait_event(["CTRL-EVENT-BSS-REMOVED"], timeout=15)
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if ev is None:
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raise Exception("BSS entry expiration timed out")
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if bssid in dev[0].request("SCAN_RESULTS"):
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raise Exception("BSS not removed after expiration time")
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finally:
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dev[0].request("BSS_EXPIRE_AGE 180")
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def test_scan_filter(dev, apdev):
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"""Filter scan results based on SSID"""
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try:
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if "OK" not in dev[0].request("SET filter_ssids 1"):
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raise Exception("SET failed")
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dev[0].connect("test-scan", key_mgmt="NONE", only_add_network=True)
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hostapd.add_ap(apdev[0]['ifname'], { "ssid": "test-scan" })
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bssid = apdev[0]['bssid']
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hostapd.add_ap(apdev[1]['ifname'], { "ssid": "test-scan2" })
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bssid2 = apdev[1]['bssid']
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dev[0].scan(freq="2412", only_new=True)
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if bssid not in dev[0].request("SCAN_RESULTS"):
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raise Exception("BSS not found in scan results")
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if bssid2 in dev[0].request("SCAN_RESULTS"):
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raise Exception("Unexpected BSS found in scan results")
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finally:
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dev[0].request("SET filter_ssids 0")
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def test_scan_int(dev, apdev):
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"""scan interval configuration"""
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try:
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if "FAIL" not in dev[0].request("SCAN_INTERVAL -1"):
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raise Exception("Accepted invalid scan interval")
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if "OK" not in dev[0].request("SCAN_INTERVAL 1"):
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raise Exception("Failed to set scan interval")
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dev[0].connect("not-used", key_mgmt="NONE", scan_freq="2412",
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wait_connect=False)
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times = {}
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for i in range(0, 3):
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logger.info("Waiting for scan to start")
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start = os.times()[4]
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ev = dev[0].wait_event(["CTRL-EVENT-SCAN-STARTED"], timeout=5)
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if ev is None:
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raise Exception("did not start a scan")
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stop = os.times()[4]
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times[i] = stop - start
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logger.info("Waiting for scan to complete")
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ev = dev[0].wait_event(["CTRL-EVENT-SCAN-RESULTS"], 10)
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if ev is None:
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raise Exception("did not complete a scan")
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print times
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if times[0] > 1 or times[1] < 0.5 or times[1] > 1.5 or times[2] < 0.5 or times[2] > 1.5:
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raise Exception("Unexpected scan timing: " + str(times))
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finally:
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dev[0].request("SCAN_INTERVAL 5")
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def test_scan_bss_operations(dev, apdev):
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"""Control interface behavior on BSS parameters"""
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hostapd.add_ap(apdev[0]['ifname'], { "ssid": "test-scan" })
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bssid = apdev[0]['bssid']
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hostapd.add_ap(apdev[1]['ifname'], { "ssid": "test2-scan" })
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bssid2 = apdev[1]['bssid']
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dev[0].scan(freq="2412")
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dev[0].scan(freq="2412")
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dev[0].scan(freq="2412")
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id1 = dev[0].request("BSS FIRST MASK=0x1").splitlines()[0].split('=')[1]
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id2 = dev[0].request("BSS LAST MASK=0x1").splitlines()[0].split('=')[1]
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res = dev[0].request("BSS RANGE=ALL MASK=0x20001")
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if "id=" + id1 not in res:
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raise Exception("Missing BSS " + id1)
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if "id=" + id2 not in res:
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raise Exception("Missing BSS " + id2)
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if "====" not in res:
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raise Exception("Missing delim")
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if "####" not in res:
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raise Exception("Missing end")
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res = dev[0].request("BSS RANGE=ALL MASK=0x1").splitlines()
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if len(res) != 2:
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raise Exception("Unexpected result")
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res = dev[0].request("BSS FIRST MASK=0x1")
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if "id=" + id1 not in res:
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raise Exception("Unexpected result: " + res)
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res = dev[0].request("BSS LAST MASK=0x1")
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if "id=" + id2 not in res:
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raise Exception("Unexpected result: " + res)
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res = dev[0].request("BSS ID-" + id1 + " MASK=0x1")
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if "id=" + id1 not in res:
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raise Exception("Unexpected result: " + res)
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res = dev[0].request("BSS NEXT-" + id1 + " MASK=0x1")
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if "id=" + id2 not in res:
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raise Exception("Unexpected result: " + res)
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if len(dev[0].request("BSS RANGE=" + id2 + " MASK=0x1").splitlines()) != 0:
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raise Exception("Unexpected RANGE=1 result")
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if len(dev[0].request("BSS RANGE=" + id1 + "- MASK=0x1").splitlines()) != 2:
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raise Exception("Unexpected RANGE=0- result")
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if len(dev[0].request("BSS RANGE=-" + id2 + " MASK=0x1").splitlines()) != 2:
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raise Exception("Unexpected RANGE=-1 result")
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if len(dev[0].request("BSS RANGE=" + id1 + "-" + id2 + " MASK=0x1").splitlines()) != 2:
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raise Exception("Unexpected RANGE=0-1 result")
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if len(dev[0].request("BSS RANGE=" + id2 + "-" + id2 + " MASK=0x1").splitlines()) != 1:
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raise Exception("Unexpected RANGE=1-1 result")
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if len(dev[0].request("BSS RANGE=" + str(int(id2) + 1) + "-" + str(int(id2) + 10) + " MASK=0x1").splitlines()) != 0:
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raise Exception("Unexpected RANGE=2-10 result")
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if len(dev[0].request("BSS RANGE=0-" + str(int(id2) + 10) + " MASK=0x1").splitlines()) != 2:
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raise Exception("Unexpected RANGE=0-10 result")
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def test_scan_and_interface_disabled(dev, apdev):
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"""Scan operation when interface gets disabled"""
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try:
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dev[0].request("SCAN")
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ev = dev[0].wait_event(["CTRL-EVENT-SCAN-STARTED"])
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if ev is None:
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raise Exception("Scan did not start")
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dev[0].request("DRIVER_EVENT INTERFACE_DISABLED")
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ev = dev[0].wait_event(["CTRL-EVENT-SCAN-RESULTS"], timeout=7)
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if ev is not None:
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raise Exception("Scan completed unexpectedly")
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# verify that scan is rejected
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if "FAIL" not in dev[0].request("SCAN"):
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raise Exception("New scan request was accepted unexpectedly")
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dev[0].request("DRIVER_EVENT INTERFACE_ENABLED")
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dev[0].scan(freq="2412")
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finally:
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dev[0].request("DRIVER_EVENT INTERFACE_ENABLED")
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