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3d5bb90090
fragattacks/tests/hwsim/test_fils.py
Jouni Malinen 3d5bb90090 tests: FILS SK HLP (rapid commit server timeout) 
Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>
2017-02-13 10:58:21 +02:00

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# Test cases for FILS
# Copyright (c) 2015-2017, Qualcomm Atheros, Inc.
#
# This software may be distributed under the terms of the BSD license.
# See README for more details.
import binascii
import hashlib
import logging
logger = logging.getLogger()
import os
import socket
import struct
import time
import hostapd
from wpasupplicant import WpaSupplicant
import hwsim_utils
from utils import HwsimSkip
from test_erp import check_erp_capa, start_erp_as
from test_ap_hs20 import ip_checksum
def check_fils_capa(dev):
capa = dev.get_capability("fils")
if capa is None or "FILS" not in capa:
raise HwsimSkip("FILS not supported")
def test_fils_sk_full_auth(dev, apdev):
"""FILS SK full authentication"""
check_fils_capa(dev[0])
check_erp_capa(dev[0])
start_erp_as(apdev[1])
bssid = apdev[0]['bssid']
params = hostapd.wpa2_eap_params(ssid="fils")
params['wpa_key_mgmt'] = "FILS-SHA256"
params['auth_server_port'] = "18128"
params['erp_send_reauth_start'] = '1'
params['erp_domain'] = 'example.com'
params['fils_realm'] = 'example.com'
params['wpa_group_rekey'] = '1'
hapd = hostapd.add_ap(apdev[0]['ifname'], params)
dev[0].scan_for_bss(bssid, freq=2412)
bss = dev[0].get_bss(bssid)
logger.debug("BSS: " + str(bss))
if "[FILS]" not in bss['flags']:
raise Exception("[FILS] flag not indicated")
if "[WPA2-FILS-SHA256-CCMP]" not in bss['flags']:
raise Exception("[WPA2-FILS-SHA256-CCMP] flag not indicated")
res = dev[0].request("SCAN_RESULTS")
logger.debug("SCAN_RESULTS: " + res)
if "[FILS]" not in res:
raise Exception("[FILS] flag not indicated")
if "[WPA2-FILS-SHA256-CCMP]" not in res:
raise Exception("[WPA2-FILS-SHA256-CCMP] flag not indicated")
dev[0].request("ERP_FLUSH")
dev[0].connect("fils", key_mgmt="FILS-SHA256",
eap="PSK", identity="psk.user@example.com",
password_hex="0123456789abcdef0123456789abcdef",
erp="1", scan_freq="2412")
hwsim_utils.test_connectivity(dev[0], hapd)
ev = dev[0].wait_event(["WPA: Group rekeying completed"], timeout=2)
if ev is None:
raise Exception("GTK rekey timed out")
hwsim_utils.test_connectivity(dev[0], hapd)
conf = hapd.get_config()
if conf['key_mgmt'] != 'FILS-SHA256':
raise Exception("Unexpected config key_mgmt: " + conf['key_mgmt'])
def test_fils_sk_sha384_full_auth(dev, apdev):
"""FILS SK full authentication (SHA384)"""
check_fils_capa(dev[0])
check_erp_capa(dev[0])
start_erp_as(apdev[1])
bssid = apdev[0]['bssid']
params = hostapd.wpa2_eap_params(ssid="fils")
params['wpa_key_mgmt'] = "FILS-SHA384"
params['auth_server_port'] = "18128"
params['erp_send_reauth_start'] = '1'
params['erp_domain'] = 'example.com'
params['fils_realm'] = 'example.com'
params['wpa_group_rekey'] = '1'
hapd = hostapd.add_ap(apdev[0]['ifname'], params)
dev[0].scan_for_bss(bssid, freq=2412)
bss = dev[0].get_bss(bssid)
logger.debug("BSS: " + str(bss))
if "[FILS]" not in bss['flags']:
raise Exception("[FILS] flag not indicated")
if "[WPA2-FILS-SHA384-CCMP]" not in bss['flags']:
raise Exception("[WPA2-FILS-SHA384-CCMP] flag not indicated")
res = dev[0].request("SCAN_RESULTS")
logger.debug("SCAN_RESULTS: " + res)
if "[FILS]" not in res:
raise Exception("[FILS] flag not indicated")
if "[WPA2-FILS-SHA384-CCMP]" not in res:
raise Exception("[WPA2-FILS-SHA384-CCMP] flag not indicated")
dev[0].request("ERP_FLUSH")
dev[0].connect("fils", key_mgmt="FILS-SHA384",
eap="PSK", identity="psk.user@example.com",
password_hex="0123456789abcdef0123456789abcdef",
erp="1", scan_freq="2412")
hwsim_utils.test_connectivity(dev[0], hapd)
ev = dev[0].wait_event(["WPA: Group rekeying completed"], timeout=2)
if ev is None:
raise Exception("GTK rekey timed out")
hwsim_utils.test_connectivity(dev[0], hapd)
conf = hapd.get_config()
if conf['key_mgmt'] != 'FILS-SHA384':
raise Exception("Unexpected config key_mgmt: " + conf['key_mgmt'])
def test_fils_sk_pmksa_caching(dev, apdev):
"""FILS SK and PMKSA caching"""
check_fils_capa(dev[0])
check_erp_capa(dev[0])
start_erp_as(apdev[1])
bssid = apdev[0]['bssid']
params = hostapd.wpa2_eap_params(ssid="fils")
params['wpa_key_mgmt'] = "FILS-SHA256"
params['auth_server_port'] = "18128"
params['erp_domain'] = 'example.com'
params['fils_realm'] = 'example.com'
hapd = hostapd.add_ap(apdev[0]['ifname'], params)
dev[0].scan_for_bss(bssid, freq=2412)
dev[0].request("ERP_FLUSH")
id = dev[0].connect("fils", key_mgmt="FILS-SHA256",
eap="PSK", identity="psk.user@example.com",
password_hex="0123456789abcdef0123456789abcdef",
erp="1", scan_freq="2412")
pmksa = dev[0].get_pmksa(bssid)
if pmksa is None:
raise Exception("No PMKSA cache entry created")
dev[0].request("DISCONNECT")
dev[0].wait_disconnected()
dev[0].dump_monitor()
dev[0].select_network(id, freq=2412)
ev = dev[0].wait_event(["CTRL-EVENT-EAP-STARTED",
"CTRL-EVENT-CONNECTED"], timeout=10)
if ev is None:
raise Exception("Connection using PMKSA caching timed out")
if "CTRL-EVENT-EAP-STARTED" in ev:
raise Exception("Unexpected EAP exchange")
hwsim_utils.test_connectivity(dev[0], hapd)
pmksa2 = dev[0].get_pmksa(bssid)
if pmksa2 is None:
raise Exception("No PMKSA cache entry found")
if pmksa['pmkid'] != pmksa2['pmkid']:
raise Exception("Unexpected PMKID change")
# Verify EAPOL reauthentication after FILS authentication
hapd.request("EAPOL_REAUTH " + dev[0].own_addr())
ev = dev[0].wait_event(["CTRL-EVENT-EAP-STARTED"], timeout=5)
if ev is None:
raise Exception("EAP authentication did not start")
ev = dev[0].wait_event(["CTRL-EVENT-EAP-SUCCESS"], timeout=5)
if ev is None:
raise Exception("EAP authentication did not succeed")
time.sleep(0.1)
hwsim_utils.test_connectivity(dev[0], hapd)
def test_fils_sk_erp(dev, apdev):
"""FILS SK using ERP"""
run_fils_sk_erp(dev, apdev, "FILS-SHA256")
def test_fils_sk_erp_sha384(dev, apdev):
"""FILS SK using ERP and SHA384"""
run_fils_sk_erp(dev, apdev, "FILS-SHA384")
def run_fils_sk_erp(dev, apdev, key_mgmt):
check_fils_capa(dev[0])
check_erp_capa(dev[0])
start_erp_as(apdev[1])
bssid = apdev[0]['bssid']
params = hostapd.wpa2_eap_params(ssid="fils")
params['wpa_key_mgmt'] = key_mgmt
params['auth_server_port'] = "18128"
params['erp_domain'] = 'example.com'
params['fils_realm'] = 'example.com'
params['disable_pmksa_caching'] = '1'
hapd = hostapd.add_ap(apdev[0]['ifname'], params)
dev[0].scan_for_bss(bssid, freq=2412)
dev[0].request("ERP_FLUSH")
id = dev[0].connect("fils", key_mgmt=key_mgmt,
eap="PSK", identity="psk.user@example.com",
password_hex="0123456789abcdef0123456789abcdef",
erp="1", scan_freq="2412")
dev[0].request("DISCONNECT")
dev[0].wait_disconnected()
dev[0].dump_monitor()
dev[0].select_network(id, freq=2412)
ev = dev[0].wait_event(["CTRL-EVENT-EAP-STARTED",
"EVENT-ASSOC-REJECT",
"CTRL-EVENT-CONNECTED"], timeout=10)
if ev is None:
raise Exception("Connection using FILS/ERP timed out")
if "CTRL-EVENT-EAP-STARTED" in ev:
raise Exception("Unexpected EAP exchange")
if "EVENT-ASSOC-REJECT" in ev:
raise Exception("Association failed")
hwsim_utils.test_connectivity(dev[0], hapd)
def test_fils_sk_erp_another_ssid(dev, apdev):
"""FILS SK using ERP and roam to another SSID"""
check_fils_capa(dev[0])
check_erp_capa(dev[0])
start_erp_as(apdev[1])
bssid = apdev[0]['bssid']
params = hostapd.wpa2_eap_params(ssid="fils")
params['wpa_key_mgmt'] = "FILS-SHA256"
params['auth_server_port'] = "18128"
params['erp_domain'] = 'example.com'
params['fils_realm'] = 'example.com'
params['disable_pmksa_caching'] = '1'
hapd = hostapd.add_ap(apdev[0]['ifname'], params)
dev[0].scan_for_bss(bssid, freq=2412)
dev[0].request("ERP_FLUSH")
id = dev[0].connect("fils", key_mgmt="FILS-SHA256",
eap="PSK", identity="psk.user@example.com",
password_hex="0123456789abcdef0123456789abcdef",
erp="1", scan_freq="2412")
dev[0].request("DISCONNECT")
dev[0].wait_disconnected()
hapd.disable()
dev[0].flush_scan_cache()
if "FAIL" in dev[0].request("PMKSA_FLUSH"):
raise Exception("PMKSA_FLUSH failed")
params = hostapd.wpa2_eap_params(ssid="fils2")
params['wpa_key_mgmt'] = "FILS-SHA256"
params['auth_server_port'] = "18128"
params['erp_domain'] = 'example.com'
params['fils_realm'] = 'example.com'
params['disable_pmksa_caching'] = '1'
hapd = hostapd.add_ap(apdev[0]['ifname'], params)
dev[0].scan_for_bss(bssid, freq=2412)
dev[0].dump_monitor()
id = dev[0].connect("fils2", key_mgmt="FILS-SHA256",
eap="PSK", identity="psk.user@example.com",
password_hex="0123456789abcdef0123456789abcdef",
erp="1", scan_freq="2412", wait_connect=False)
ev = dev[0].wait_event(["CTRL-EVENT-EAP-STARTED",
"EVENT-ASSOC-REJECT",
"CTRL-EVENT-CONNECTED"], timeout=10)
if ev is None:
raise Exception("Connection using FILS/ERP timed out")
if "CTRL-EVENT-EAP-STARTED" in ev:
raise Exception("Unexpected EAP exchange")
if "EVENT-ASSOC-REJECT" in ev:
raise Exception("Association failed")
hwsim_utils.test_connectivity(dev[0], hapd)
def test_fils_sk_multiple_realms(dev, apdev):
"""FILS SK and multiple realms"""
check_fils_capa(dev[0])
check_erp_capa(dev[0])
start_erp_as(apdev[1])
bssid = apdev[0]['bssid']
params = hostapd.wpa2_eap_params(ssid="fils")
params['wpa_key_mgmt'] = "FILS-SHA256"
params['auth_server_port'] = "18128"
params['erp_domain'] = 'example.com'
fils_realms = [ 'r1.example.org', 'r2.EXAMPLE.org', 'r3.example.org',
'r4.example.org', 'r5.example.org', 'r6.example.org',
'r7.example.org', 'r8.example.org',
'example.com',
'r9.example.org', 'r10.example.org', 'r11.example.org',
'r12.example.org', 'r13.example.org', 'r14.example.org',
'r15.example.org', 'r16.example.org' ]
params['fils_realm'] = fils_realms
params['fils_cache_id'] = "1234"
params['hessid'] = bssid
hapd = hostapd.add_ap(apdev[0]['ifname'], params)
dev[0].scan_for_bss(bssid, freq=2412)
if "OK" not in dev[0].request("ANQP_GET " + bssid + " 275"):
raise Exception("ANQP_GET command failed")
ev = dev[0].wait_event(["GAS-QUERY-DONE"], timeout=10)
if ev is None:
raise Exception("GAS query timed out")
bss = dev[0].get_bss(bssid)
if 'fils_info' not in bss:
raise Exception("FILS Indication element information missing")
if bss['fils_info'] != '02b8':
raise Exception("Unexpected FILS Information: " + bss['fils_info'])
if 'fils_cache_id' not in bss:
raise Exception("FILS Cache Identifier missing")
if bss['fils_cache_id'] != '1234':
raise Exception("Unexpected FILS Cache Identifier: " + bss['fils_cache_id'])
if 'fils_realms' not in bss:
raise Exception("FILS Realm Identifiers missing")
expected = ''
count = 0
for realm in fils_realms:
hash = hashlib.sha256(realm.lower()).digest()
expected += binascii.hexlify(hash[0:2])
count += 1
if count == 7:
break
if bss['fils_realms'] != expected:
raise Exception("Unexpected FILS Realm Identifiers: " + bss['fils_realms'])
if 'anqp_fils_realm_info' not in bss:
raise Exception("FILS Realm Information ANQP-element not seen")
info = bss['anqp_fils_realm_info'];
expected = ''
for realm in fils_realms:
hash = hashlib.sha256(realm.lower()).digest()
expected += binascii.hexlify(hash[0:2])
if info != expected:
raise Exception("Unexpected FILS Realm Info ANQP-element: " + info)
dev[0].request("ERP_FLUSH")
id = dev[0].connect("fils", key_mgmt="FILS-SHA256",
eap="PSK", identity="psk.user@example.com",
password_hex="0123456789abcdef0123456789abcdef",
erp="1", scan_freq="2412")
dev[0].request("DISCONNECT")
dev[0].wait_disconnected()
dev[0].dump_monitor()
dev[0].select_network(id, freq=2412)
ev = dev[0].wait_event(["CTRL-EVENT-EAP-STARTED",
"EVENT-ASSOC-REJECT",
"CTRL-EVENT-CONNECTED"], timeout=10)
if ev is None:
raise Exception("Connection using FILS/ERP timed out")
if "CTRL-EVENT-EAP-STARTED" in ev:
raise Exception("Unexpected EAP exchange")
if "EVENT-ASSOC-REJECT" in ev:
raise Exception("Association failed")
hwsim_utils.test_connectivity(dev[0], hapd)
# DHCP message op codes
BOOTREQUEST=1
BOOTREPLY=2
OPT_PAD=0
OPT_DHCP_MESSAGE_TYPE=53
OPT_RAPID_COMMIT=80
OPT_END=255
DHCPDISCOVER=1
DHCPOFFER=2
DHCPREQUEST=3
DHCPDECLINE=4
DHCPACK=5
DHCPNAK=6
DHCPRELEASE=7
DHCPINFORM=8
def build_dhcp(req, dhcp_msg, chaddr, giaddr="0.0.0.0",
ip_src="0.0.0.0", ip_dst="255.255.255.255",
rapid_commit=True):
proto = '\x08\x00' # IPv4
_ip_src = socket.inet_pton(socket.AF_INET, ip_src)
_ip_dst = socket.inet_pton(socket.AF_INET, ip_dst)
_ciaddr = '\x00\x00\x00\x00'
_yiaddr = '\x00\x00\x00\x00'
_siaddr = '\x00\x00\x00\x00'
_giaddr = socket.inet_pton(socket.AF_INET, giaddr)
_chaddr = binascii.unhexlify(chaddr.replace(':','')) + 10*'\x00'
htype = 1 # Hardware address type; 1 = Ethernet
hlen = 6 # Hardware address length
hops = 0
xid = 123456
secs = 0
flags = 0
if req:
op = BOOTREQUEST
src_port = 68
dst_port = 67
else:
op = BOOTREPLY
src_port = 67
dst_port = 68
payload = struct.pack('>BBBBLHH', op, htype, hlen, hops, xid, secs, flags)
sname = 64*'\x00'
file = 128*'\x00'
payload += _ciaddr + _yiaddr + _siaddr + _giaddr + _chaddr + sname + file
# magic - DHCP
payload += '\x63\x82\x53\x63'
# Option: DHCP Message Type
payload += struct.pack('BBB', OPT_DHCP_MESSAGE_TYPE, 1, dhcp_msg)
if rapid_commit:
# Option: Rapid Commit
payload += struct.pack('BB', OPT_RAPID_COMMIT, 0)
# End Option
payload += struct.pack('B', OPT_END)
udp = struct.pack('>HHHH', src_port, dst_port,
8 + len(payload), 0) + payload
tot_len = 20 + len(udp)
start = struct.pack('>BBHHBBBB', 0x45, 0, tot_len, 0, 0, 0, 128, 17)
ipv4 = start + '\x00\x00' + _ip_src + _ip_dst
csum = ip_checksum(ipv4)
ipv4 = start + csum + _ip_src + _ip_dst
return proto + ipv4 + udp
def fils_hlp_config(fils_hlp_wait_time=10000):
params = hostapd.wpa2_eap_params(ssid="fils")
params['wpa_key_mgmt'] = "FILS-SHA256"
params['auth_server_port'] = "18128"
params['erp_domain'] = 'example.com'
params['fils_realm'] = 'example.com'
params['disable_pmksa_caching'] = '1'
params['own_ip_addr'] = '127.0.0.3'
params['dhcp_server'] = '127.0.0.2'
params['fils_hlp_wait_time'] = str(fils_hlp_wait_time)
return params
def test_fils_sk_hlp(dev, apdev):
"""FILS SK HLP (rapid commit server)"""
run_fils_sk_hlp(dev, apdev, True)
def test_fils_sk_hlp_no_rapid_commit(dev, apdev):
"""FILS SK HLP (no rapid commit server)"""
run_fils_sk_hlp(dev, apdev, False)
def run_fils_sk_hlp(dev, apdev, rapid_commit_server):
check_fils_capa(dev[0])
check_erp_capa(dev[0])
start_erp_as(apdev[1])
sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM, socket.IPPROTO_UDP)
sock.settimeout(5)
sock.bind(("127.0.0.2", 67))
bssid = apdev[0]['bssid']
params = fils_hlp_config()
params['fils_hlp_wait_time'] = '10000'
if not rapid_commit_server:
params['dhcp_rapid_commit_proxy'] = '1'
hapd = hostapd.add_ap(apdev[0]['ifname'], params)
dev[0].scan_for_bss(bssid, freq=2412)
dev[0].request("ERP_FLUSH")
if "OK" not in dev[0].request("FILS_HLP_REQ_FLUSH"):
raise Exception("Failed to flush pending FILS HLP requests")
tests = [ "",
"q",
"ff:ff:ff:ff:ff:ff",
"ff:ff:ff:ff:ff:ff q" ]
for t in tests:
if "FAIL" not in dev[0].request("FILS_HLP_REQ_ADD " + t):
raise Exception("Invalid FILS_HLP_REQ_ADD accepted: " + t)
dhcpdisc = build_dhcp(req=True, dhcp_msg=DHCPDISCOVER,
chaddr=dev[0].own_addr())
tests = [ "ff:ff:ff:ff:ff:ff aabb",
"ff:ff:ff:ff:ff:ff " + 255*'cc',
hapd.own_addr() + " ddee010203040506070809",
"ff:ff:ff:ff:ff:ff " + binascii.hexlify(dhcpdisc) ]
for t in tests:
if "OK" not in dev[0].request("FILS_HLP_REQ_ADD " + t):
raise Exception("FILS_HLP_REQ_ADD failed: " + t)
id = dev[0].connect("fils", key_mgmt="FILS-SHA256",
eap="PSK", identity="psk.user@example.com",
password_hex="0123456789abcdef0123456789abcdef",
erp="1", scan_freq="2412")
dev[0].request("DISCONNECT")
dev[0].wait_disconnected()
dev[0].dump_monitor()
dev[0].select_network(id, freq=2412)
(msg,addr) = sock.recvfrom(1000)
logger.debug("Received DHCP message from %s" % str(addr))
if rapid_commit_server:
# TODO: Proper rapid commit response
dhcpdisc = build_dhcp(req=False, dhcp_msg=DHCPACK,
chaddr=dev[0].own_addr(), giaddr="127.0.0.3")
sock.sendto(dhcpdisc[2+20+8:], addr)
else:
dhcpdisc = build_dhcp(req=False, dhcp_msg=DHCPOFFER, rapid_commit=False,
chaddr=dev[0].own_addr(), giaddr="127.0.0.3")
sock.sendto(dhcpdisc[2+20+8:], addr)
(msg,addr) = sock.recvfrom(1000)
logger.debug("Received DHCP message from %s" % str(addr))
dhcpdisc = build_dhcp(req=False, dhcp_msg=DHCPACK, rapid_commit=False,
chaddr=dev[0].own_addr(), giaddr="127.0.0.3")
sock.sendto(dhcpdisc[2+20+8:], addr)
ev = dev[0].wait_event(["FILS-HLP-RX"], timeout=10)
if ev is None:
raise Exception("FILS HLP response not reported")
vals = ev.split(' ')
frame = binascii.unhexlify(vals[3].split('=')[1])
proto, = struct.unpack('>H', frame[0:2])
if proto != 0x0800:
raise Exception("Unexpected ethertype in HLP response: %d" % proto)
frame = frame[2:]
ip = frame[0:20]
if ip_checksum(ip) != '\x00\x00':
raise Exception("IP header checksum mismatch in HLP response")
frame = frame[20:]
udp = frame[0:8]
frame = frame[8:]
sport, dport, ulen, ucheck = struct.unpack('>HHHH', udp)
if sport != 67 or dport != 68:
raise Exception("Unexpected UDP port in HLP response")
dhcp = frame[0:28]
frame = frame[28:]
op,htype,hlen,hops,xid,secs,flags,ciaddr,yiaddr,siaddr,giaddr = struct.unpack('>4BL2H4L', dhcp)
chaddr = frame[0:16]
frame = frame[16:]
sname = frame[0:64]
frame = frame[64:]
file = frame[0:128]
frame = frame[128:]
options = frame
if options[0:4] != '\x63\x82\x53\x63':
raise Exception("No DHCP magic seen in HLP response")
options = options[4:]
# TODO: fully parse and validate DHCPACK options
if struct.pack('BBB', OPT_DHCP_MESSAGE_TYPE, 1, DHCPACK) not in options:
raise Exception("DHCPACK not in HLP response")
dev[0].wait_connected()
dev[0].request("FILS_HLP_REQ_FLUSH")
def test_fils_sk_hlp_timeout(dev, apdev):
"""FILS SK HLP (rapid commit server timeout)"""
check_fils_capa(dev[0])
check_erp_capa(dev[0])
start_erp_as(apdev[1])
sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM, socket.IPPROTO_UDP)
sock.settimeout(5)
sock.bind(("127.0.0.2", 67))
bssid = apdev[0]['bssid']
params = fils_hlp_config(fils_hlp_wait_time=30)
hapd = hostapd.add_ap(apdev[0]['ifname'], params)
dev[0].scan_for_bss(bssid, freq=2412)
dev[0].request("ERP_FLUSH")
if "OK" not in dev[0].request("FILS_HLP_REQ_FLUSH"):
raise Exception("Failed to flush pending FILS HLP requests")
dhcpdisc = build_dhcp(req=True, dhcp_msg=DHCPDISCOVER,
chaddr=dev[0].own_addr())
if "OK" not in dev[0].request("FILS_HLP_REQ_ADD " + "ff:ff:ff:ff:ff:ff " + binascii.hexlify(dhcpdisc)):
raise Exception("FILS_HLP_REQ_ADD failed")
id = dev[0].connect("fils", key_mgmt="FILS-SHA256",
eap="PSK", identity="psk.user@example.com",
password_hex="0123456789abcdef0123456789abcdef",
erp="1", scan_freq="2412")
dev[0].request("DISCONNECT")
dev[0].wait_disconnected()
dev[0].dump_monitor()
dev[0].select_network(id, freq=2412)
(msg,addr) = sock.recvfrom(1000)
logger.debug("Received DHCP message from %s" % str(addr))
# Wait for HLP wait timeout to hit
# FILS: HLP response timeout - continue with association response
dev[0].wait_connected()
dev[0].request("FILS_HLP_REQ_FLUSH")
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