hostap/tests/hwsim/utils.py

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# Testing utilities
# Copyright (c) 2013-2019, Jouni Malinen <j@w1.fi>
#
# This software may be distributed under the terms of the BSD license.
# See README for more details.
import binascii
import os
import socket
import struct
import subprocess
import time
import remotehost
import logging
logger = logging.getLogger()
def get_ifnames():
ifnames = []
with open("/proc/net/dev", "r") as f:
lines = f.readlines()
for l in lines:
val = l.split(':', 1)
if len(val) == 2:
ifnames.append(val[0].strip(' '))
return ifnames
class HwsimSkip(Exception):
def __init__(self, reason):
self.reason = reason
def __str__(self):
return self.reason
class alloc_fail(object):
def __init__(self, dev, count, funcs):
self._dev = dev
self._count = count
self._funcs = funcs
def __enter__(self):
cmd = "TEST_ALLOC_FAIL %d:%s" % (self._count, self._funcs)
if "OK" not in self._dev.request(cmd):
raise HwsimSkip("TEST_ALLOC_FAIL not supported")
def __exit__(self, type, value, traceback):
if type is None:
if self._dev.request("GET_ALLOC_FAIL") != "0:%s" % self._funcs:
raise Exception("Allocation failure did not trigger")
class fail_test(object):
def __init__(self, dev, count, funcs):
self._dev = dev
self._count = count
self._funcs = funcs
def __enter__(self):
cmd = "TEST_FAIL %d:%s" % (self._count, self._funcs)
if "OK" not in self._dev.request(cmd):
raise HwsimSkip("TEST_FAIL not supported")
def __exit__(self, type, value, traceback):
if type is None:
if self._dev.request("GET_FAIL") != "0:%s" % self._funcs:
raise Exception("Test failure did not trigger")
def wait_fail_trigger(dev, cmd, note="Failure not triggered", max_iter=40):
for i in range(0, max_iter):
if dev.request(cmd).startswith("0:"):
break
if i == max_iter - 1:
raise Exception(note)
time.sleep(0.05)
def require_under_vm():
with open('/proc/1/cmdline', 'r') as f:
cmd = f.read()
if "inside.sh" not in cmd:
raise HwsimSkip("Not running under VM")
def iface_is_in_bridge(bridge, ifname):
fname = "/sys/class/net/"+ifname+"/brport/bridge"
if not os.path.exists(fname):
return False
if not os.path.islink(fname):
return False
truebridge = os.path.basename(os.readlink(fname))
if bridge == truebridge:
return True
return False
def skip_with_fips(dev, reason="Not supported in FIPS mode"):
res = dev.get_capability("fips")
if res and 'FIPS' in res:
raise HwsimSkip(reason)
def get_phy(ap, ifname=None):
phy = "phy3"
try:
hostname = ap['hostname']
except:
hostname = None
host = remotehost.Host(hostname)
if ifname == None:
ifname = ap['ifname']
status, buf = host.execute(["iw", "dev", ifname, "info"])
if status != 0:
raise Exception("iw " + ifname + " info failed")
lines = buf.split("\n")
for line in lines:
if "wiphy" in line:
words = line.split()
phy = "phy" + words[1]
break
return phy
def parse_ie(buf):
ret = {}
data = binascii.unhexlify(buf)
while len(data) >= 2:
ie, elen = struct.unpack('BB', data[0:2])
data = data[2:]
if elen > len(data):
break
ret[ie] = data[0:elen]
data = data[elen:]
return ret
def wait_regdom_changes(dev):
for i in range(10):
ev = dev.wait_event(["CTRL-EVENT-REGDOM-CHANGE"], timeout=0.1)
if ev is None:
break
def clear_country(dev):
logger.info("Try to clear country")
id = dev[1].add_network()
dev[1].set_network(id, "mode", "2")
dev[1].set_network_quoted(id, "ssid", "country-clear")
dev[1].set_network(id, "key_mgmt", "NONE")
dev[1].set_network(id, "frequency", "2412")
dev[1].set_network(id, "scan_freq", "2412")
dev[1].select_network(id)
ev = dev[1].wait_event(["CTRL-EVENT-CONNECTED"])
if ev:
dev[0].connect("country-clear", key_mgmt="NONE", scan_freq="2412")
dev[1].request("DISCONNECT")
dev[0].wait_disconnected()
dev[0].request("DISCONNECT")
dev[0].request("ABORT_SCAN")
time.sleep(1)
dev[0].dump_monitor()
dev[1].dump_monitor()
def clear_regdom(hapd, dev, count=1):
if hapd:
hapd.request("DISABLE")
time.sleep(0.1)
clear_regdom_dev(dev, count)
def clear_regdom_dev(dev, count=1):
for i in range(count):
dev[i].request("DISCONNECT")
for i in range(count):
dev[i].disconnect_and_stop_scan()
subprocess.call(['iw', 'reg', 'set', '00'])
wait_regdom_changes(dev[0])
country = dev[0].get_driver_status_field("country")
logger.info("Country code at the end: " + country)
if country != "00":
clear_country(dev)
for i in range(count):
dev[i].flush_scan_cache()
def radiotap_build():
radiotap_payload = struct.pack('BB', 0x08, 0)
radiotap_payload += struct.pack('BB', 0, 0)
radiotap_payload += struct.pack('BB', 0, 0)
radiotap_hdr = struct.pack('<BBHL', 0, 0, 8 + len(radiotap_payload),
0xc002)
return radiotap_hdr + radiotap_payload
def start_monitor(ifname, freq=2412):
subprocess.check_call(["iw", ifname, "set", "type", "monitor"])
subprocess.call(["ip", "link", "set", "dev", ifname, "up"])
subprocess.check_call(["iw", ifname, "set", "freq", str(freq)])
ETH_P_ALL = 3
sock = socket.socket(socket.AF_PACKET, socket.SOCK_RAW,
socket.htons(ETH_P_ALL))
sock.bind((ifname, 0))
sock.settimeout(0.5)
return sock
def stop_monitor(ifname):
subprocess.call(["ip", "link", "set", "dev", ifname, "down"])
subprocess.call(["iw", ifname, "set", "type", "managed"])