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tests: FILS HLP request with DHCPDISCOVER

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Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>
This commit is contained in:
Jouni Malinen 2017-01-31 14:41:24 +02:00 committed by Jouni Malinen
parent 124ddfa19e
commit eeea363cab
1 changed files with 149 additions and 11 deletions
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160
tests/hwsim/test_fils.py
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@ -1,5 +1,5 @@
# Test cases for FILS
# Copyright (c) 2015-2016, Qualcomm Atheros, Inc.
# Copyright (c) 2015-2017, Qualcomm Atheros, Inc.
#
# This software may be distributed under the terms of the BSD license.
# See README for more details.
@ -8,6 +8,9 @@ import binascii
import hashlib
import logging
logger = logging.getLogger()
import os
import socket
import struct
import time
import hostapd
@ -15,6 +18,7 @@ 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")
@ -361,13 +365,93 @@ def test_fils_sk_multiple_realms(dev, apdev):
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 test_fils_sk_hlp(dev, apdev):
"""FILS SK HLP"""
"""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 = hostapd.wpa2_eap_params(ssid="fils")
params['wpa_key_mgmt'] = "FILS-SHA256"
@ -375,6 +459,11 @@ def test_fils_sk_hlp(dev, apdev):
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'] = '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)
@ -388,9 +477,12 @@ def test_fils_sk_hlp(dev, apdev):
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"]
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)
@ -404,14 +496,60 @@ def test_fils_sk_hlp(dev, apdev):
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)
(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("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")
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")
# TODO: fils_hlp_wait_time=30 and no response from server