tests/hwsim/test_cfg80211.py

   1 # cfg80211 test cases
   2 # Copyright (c) 2014, Jouni Malinen <j@w1.fi>
   3 #
   4 # This software may be distributed under the terms of the BSD license.
   5 # See README for more details.
   6
   7 import logging
   8 logger = logging.getLogger()
   9 import binascii
  10 import os
  11 import time
  12
  13 import hostapd
  14 import hwsim_utils
  15 from tshark import run_tshark
  16 from nl80211 import *
  17
  18 def nl80211_command(dev, cmd, attr):
  19     res = dev.request("VENDOR ffffffff {} {}".format(nl80211_cmd[cmd],
  20                                                      binascii.hexlify(attr)))
  21     if "FAIL" in res:
  22         raise Exception("nl80211 command failed")
  23     return binascii.unhexlify(res)
  24
  25 def test_cfg80211_disassociate(dev, apdev):
  26     """cfg80211 disassociation command"""
  27     hapd = hostapd.add_ap(apdev[0], { "ssid": "open" })
  28     dev[0].connect("open", key_mgmt="NONE", scan_freq="2412")
  29     ev = hapd.wait_event([ "AP-STA-CONNECTED" ], timeout=5)
  30     if ev is None:
  31         raise Exception("No connection event received from hostapd")
  32
  33     ifindex = int(dev[0].get_driver_status_field("ifindex"))
  34     attrs = build_nl80211_attr_u32('IFINDEX', ifindex)
  35     attrs += build_nl80211_attr_u16('REASON_CODE', 1)
  36     attrs += build_nl80211_attr_mac('MAC', apdev[0]['bssid'])
  37     nl80211_command(dev[0], 'DISASSOCIATE', attrs)
  38
  39     ev = hapd.wait_event([ "AP-STA-DISCONNECTED" ], timeout=5)
  40     if ev is None:
  41         raise Exception("No disconnection event received from hostapd")
  42
  43 def nl80211_frame(dev, ifindex, frame, freq=None, duration=None, offchannel_tx_ok=False):
  44     attrs = build_nl80211_attr_u32('IFINDEX', ifindex)
  45     if freq is not None:
  46         attrs += build_nl80211_attr_u32('WIPHY_FREQ', freq)
  47     if duration is not None:
  48         attrs += build_nl80211_attr_u32('DURATION', duration)
  49     if offchannel_tx_ok:
  50         attrs += build_nl80211_attr_flag('OFFCHANNEL_TX_OK')
  51     attrs += build_nl80211_attr('FRAME', frame)
  52     return parse_nl80211_attrs(nl80211_command(dev, 'FRAME', attrs))
  53
  54 def nl80211_frame_wait_cancel(dev, ifindex, cookie):
  55     attrs = build_nl80211_attr_u32('IFINDEX', ifindex)
  56     attrs += build_nl80211_attr('COOKIE', cookie)
  57     return nl80211_command(dev, 'FRAME_WAIT_CANCEL', attrs)
  58
  59 def nl80211_remain_on_channel(dev, ifindex, freq, duration):
  60     attrs = build_nl80211_attr_u32('IFINDEX', ifindex)
  61     attrs += build_nl80211_attr_u32('WIPHY_FREQ', freq)
  62     attrs += build_nl80211_attr_u32('DURATION', duration)
  63     return nl80211_command(dev, 'REMAIN_ON_CHANNEL', attrs)
  64
  65 def test_cfg80211_tx_frame(dev, apdev, params):
  66     """cfg80211 offchannel TX frame command"""
  67     ifindex = int(dev[0].get_driver_status_field("ifindex"))
  68
  69     frame = binascii.unhexlify("d000000002000000010002000000000002000000010000000409506f9a090001dd5e506f9a0902020025080401001f0502006414060500585804510b0906000200000000000b1000585804510b0102030405060708090a0b0d1d000200000000000108000000000000000000101100084465766963652041110500585804510bdd190050f204104a0001101012000200011049000600372a000120")
  70
  71     dev[0].request("P2P_GROUP_ADD freq=2412")
  72     res = nl80211_frame(dev[0], ifindex, frame, freq=2422, duration=500,
  73                         offchannel_tx_ok=True)
  74     time.sleep(0.1)
  75
  76     # note: Uncommenting this seems to remove the incorrect channel issue
  77     #nl80211_frame_wait_cancel(dev[0], ifindex, res[nl80211_attr['COOKIE']])
  78
  79     # note: this Action frame ends up getting sent incorrectly on 2422 MHz
  80     nl80211_frame(dev[0], ifindex, frame, freq=2412)
  81     time.sleep(1.5)
  82     # note: also the Deauthenticate frame sent by the GO going down ends up
  83     # being transmitted incorrectly on 2422 MHz.
  84
  85     out = run_tshark(os.path.join(params['logdir'], "hwsim0.pcapng"),
  86                      "wlan.fc.type_subtype == 13", ["radiotap.channel.freq"])
  87     if out is not None:
  88         freq = out.splitlines()
  89         if len(freq) != 2:
  90             raise Exception("Unexpected number of Action frames (%d)" % len(freq))
  91         if freq[0] != "2422":
  92             raise Exception("First Action frame on unexpected channel: %s MHz" % freq[0])
  93         if freq[1] != "2412":
  94             raise Exception("Second Action frame on unexpected channel: %s MHz" % freq[1])
  95
  96 def test_cfg80211_wep_key_idx_change(dev, apdev):
  97     """WEP Shared Key authentication and key index change without deauth"""
  98     hapd = hostapd.add_ap(apdev[0],
  99                           { "ssid": "wep-shared-key",
 100                             "wep_key0": '"hello12345678"',
 101                             "wep_key1": '"other12345678"',
 102                             "auth_algs": "2" })
 103     id = dev[0].connect("wep-shared-key", key_mgmt="NONE", auth_alg="SHARED",
 104                         wep_key0='"hello12345678"',
 105                         wep_key1='"other12345678"',
 106                         wep_tx_keyidx="0",
 107                         scan_freq="2412")
 108     hwsim_utils.test_connectivity(dev[0], hapd)
 109
 110     dev[0].set_network(id, "wep_tx_keyidx", "1")
 111
 112     # clear cfg80211 auth state to allow new auth without deauth frame
 113     ifindex = int(dev[0].get_driver_status_field("ifindex"))
 114     attrs = build_nl80211_attr_u32('IFINDEX', ifindex)
 115     attrs += build_nl80211_attr_u16('REASON_CODE', 1)
 116     attrs += build_nl80211_attr_mac('MAC', apdev[0]['bssid'])
 117     attrs += build_nl80211_attr_flag('LOCAL_STATE_CHANGE')
 118     nl80211_command(dev[0], 'DEAUTHENTICATE', attrs)
 119     dev[0].wait_disconnected(timeout=5, error="Local-deauth timed out")
 120
 121     # the previous command results in deauth event followed by auto-reconnect
 122     dev[0].wait_connected(timeout=10, error="Reassociation timed out")
 123     hwsim_utils.test_connectivity(dev[0], hapd)
 124
 125 def test_cfg80211_hostapd_ext_sta_remove(dev, apdev):
 126     """cfg80211 DEL_STATION issued externally to hostapd"""
 127     hapd = hostapd.add_ap(apdev[0],
 128                           { "ssid": "open" })
 129     id = dev[0].connect("open", key_mgmt="NONE", scan_freq="2412")
 130
 131     ifindex = int(hapd.get_driver_status_field("ifindex"))
 132     attrs = build_nl80211_attr_u32('IFINDEX', ifindex)
 133     attrs += build_nl80211_attr_u16('REASON_CODE', 1)
 134     attrs += build_nl80211_attr_u8('MGMT_SUBTYPE', 12)
 135     attrs += build_nl80211_attr_mac('MAC', dev[0].own_addr())
 136     nl80211_command(hapd, 'DEL_STATION', attrs)
 137
 138     # Currently, hostapd ignores the NL80211_CMD_DEL_STATION event if
 139     # drv->device_ap_sme == 0 (which is the case with mac80211_hwsim), so no
 140     # further action happens here. If that event were to be used to remove the
 141     # STA entry from hostapd even in device_ap_sme == 0 case, this test case
 142     # could be extended to cover additional operations.