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