hostap/tests/hwsim/fst_module_aux.py
Jouni Malinen fab49f6145 tests: Python coding style cleanup (pylint3 bad-whitespace)
Signed-off-by: Jouni Malinen <jouni@codeaurora.org>
2019-03-16 18:52:09 +02:00

832 lines
32 KiB
Python

# FST tests related classes
# Copyright (c) 2015, Qualcomm Atheros, Inc.
#
# This software may be distributed under the terms of the BSD license.
# See README for more details.
import logging
import os
import signal
import time
import re
import hostapd
import wpaspy
import utils
from wpasupplicant import WpaSupplicant
import fst_test_common
logger = logging.getLogger()
def parse_fst_iface_event(ev):
"""Parses FST iface event that comes as a string, e.g.
"<3>FST-EVENT-IFACE attached ifname=wlan9 group=fstg0"
Returns a dictionary with parsed "event_type", "ifname", and "group"; or
None if not an FST event or can't be parsed."""
event = {}
if ev.find("FST-EVENT-IFACE") == -1:
return None
if ev.find("attached") != -1:
event['event_type'] = 'attached'
elif ev.find("detached") != -1:
event['event_type'] = 'detached'
else:
return None
f = re.search("ifname=(\S+)", ev)
if f is not None:
event['ifname'] = f.group(1)
f = re.search("group=(\S+)", ev)
if f is not None:
event['group'] = f.group(1)
return event
def parse_fst_session_event(ev):
"""Parses FST session event that comes as a string, e.g.
"<3>FST-EVENT-SESSION event_type=EVENT_FST_SESSION_STATE session_id=0 reason=REASON_STT"
Returns a dictionary with parsed "type", "id", and "reason"; or None if not
a FST event or can't be parsed"""
event = {}
if ev.find("FST-EVENT-SESSION") == -1:
return None
event['new_state'] = '' # The field always exists in the dictionary
f = re.search("event_type=(\S+)", ev)
if f is None:
return None
event['type'] = f.group(1)
f = re.search("session_id=(\d+)", ev)
if f is not None:
event['id'] = f.group(1)
f = re.search("old_state=(\S+)", ev)
if f is not None:
event['old_state'] = f.group(1)
f = re.search("new_state=(\S+)", ev)
if f is not None:
event['new_state'] = f.group(1)
f = re.search("reason=(\S+)", ev)
if f is not None:
event['reason'] = f.group(1)
return event
def start_two_ap_sta_pairs(apdev, rsn=False):
"""auxiliary function that creates two pairs of APs and STAs"""
ap1 = FstAP(apdev[0]['ifname'], 'fst_11a', 'a',
fst_test_common.fst_test_def_chan_a,
fst_test_common.fst_test_def_group,
fst_test_common.fst_test_def_prio_low,
fst_test_common.fst_test_def_llt, rsn=rsn)
ap1.start()
ap2 = FstAP(apdev[1]['ifname'], 'fst_11g', 'g',
fst_test_common.fst_test_def_chan_g,
fst_test_common.fst_test_def_group,
fst_test_common.fst_test_def_prio_high,
fst_test_common.fst_test_def_llt, rsn=rsn)
ap2.start()
sta1 = FstSTA('wlan5',
fst_test_common.fst_test_def_group,
fst_test_common.fst_test_def_prio_low,
fst_test_common.fst_test_def_llt, rsn=rsn)
sta1.start()
sta2 = FstSTA('wlan6',
fst_test_common.fst_test_def_group,
fst_test_common.fst_test_def_prio_high,
fst_test_common.fst_test_def_llt, rsn=rsn)
sta2.start()
return ap1, ap2, sta1, sta2
def stop_two_ap_sta_pairs(ap1, ap2, sta1, sta2):
sta1.stop()
sta2.stop()
ap1.stop()
ap2.stop()
fst_test_common.fst_clear_regdom()
def connect_two_ap_sta_pairs(ap1, ap2, dev1, dev2, rsn=False):
"""Connects a pair of stations, each one to a separate AP"""
dev1.scan(freq=fst_test_common.fst_test_def_freq_a)
dev2.scan(freq=fst_test_common.fst_test_def_freq_g)
if rsn:
dev1.connect(ap1, psk="12345678",
scan_freq=fst_test_common.fst_test_def_freq_a)
dev2.connect(ap2, psk="12345678",
scan_freq=fst_test_common.fst_test_def_freq_g)
else:
dev1.connect(ap1, key_mgmt="NONE",
scan_freq=fst_test_common.fst_test_def_freq_a)
dev2.connect(ap2, key_mgmt="NONE",
scan_freq=fst_test_common.fst_test_def_freq_g)
def disconnect_two_ap_sta_pairs(ap1, ap2, dev1, dev2):
dev1.disconnect()
dev2.disconnect()
def external_sta_connect(sta, ap, **kwargs):
"""Connects the external station to the given AP"""
if not isinstance(sta, WpaSupplicant):
raise Exception("Bad STA object")
if not isinstance(ap, FstAP):
raise Exception("Bad AP object to connect to")
hap = ap.get_instance()
sta.connect(ap.get_ssid(), **kwargs)
def disconnect_external_sta(sta, ap, check_disconnect=True):
"""Disconnects the external station from the AP"""
if not isinstance(sta, WpaSupplicant):
raise Exception("Bad STA object")
if not isinstance(ap, FstAP):
raise Exception("Bad AP object to connect to")
sta.request("DISCONNECT")
if check_disconnect:
hap = ap.get_instance()
ev = hap.wait_event(["AP-STA-DISCONNECTED"], timeout=10)
if ev is None:
raise Exception("No disconnection event received from %s" % ap.get_ssid())
#
# FstDevice class
# This is the parent class for the AP (FstAP) and STA (FstSTA) that implements
# FST functionality.
#
class FstDevice:
def __init__(self, iface, fst_group, fst_pri, fst_llt=None, rsn=False):
self.iface = iface
self.fst_group = fst_group
self.fst_pri = fst_pri
self.fst_llt = fst_llt # None llt means no llt parameter will be set
self.instance = None # Hostapd/WpaSupplicant instance
self.peer_obj = None # Peer object, must be a FstDevice child object
self.new_peer_addr = None # Peer MAC address for new session iface
self.old_peer_addr = None # Peer MAC address for old session iface
self.role = 'initiator' # Role: initiator/responder
s = self.grequest("FST-MANAGER TEST_REQUEST IS_SUPPORTED")
if not s.startswith('OK'):
raise utils.HwsimSkip("FST not supported")
self.rsn = rsn
def ifname(self):
return self.iface
def get_instance(self):
"""Gets the Hostapd/WpaSupplicant instance"""
raise Exception("Virtual get_instance() called!")
def get_own_mac_address(self):
"""Gets the device's own MAC address"""
raise Exception("Virtual get_own_mac_address() called!")
def get_new_peer_addr(self):
return self.new_peer_addr
def get_old_peer_addr(self):
return self.old_peer_addr
def get_actual_peer_addr(self):
"""Gets the peer address. A connected AP/station address is returned."""
raise Exception("Virtual get_actual_peer_addr() called!")
def grequest(self, req):
"""Send request on the global control interface"""
raise Exception("Virtual grequest() called!")
def wait_gevent(self, events, timeout=None):
"""Wait for a list of events on the global interface"""
raise Exception("Virtual wait_gevent() called!")
def request(self, req):
"""Issue a request to the control interface"""
h = self.get_instance()
return h.request(req)
def wait_event(self, events, timeout=None):
"""Wait for an event from the control interface"""
h = self.get_instance()
if timeout is not None:
return h.wait_event(events, timeout=timeout)
else:
return h.wait_event(events)
def set_old_peer_addr(self, peer_addr=None):
"""Sets the peer address"""
if peer_addr is not None:
self.old_peer_addr = peer_addr
else:
self.old_peer_addr = self.get_actual_peer_addr()
def set_new_peer_addr(self, peer_addr=None):
"""Sets the peer address"""
if peer_addr is not None:
self.new_peer_addr = peer_addr
else:
self.new_peer_addr = self.get_actual_peer_addr()
def add_peer(self, obj, old_peer_addr=None, new_peer_addr=None):
"""Add peer for FST session(s). 'obj' is a FstDevice subclass object.
The method must be called before add_session().
If peer_addr is not specified, the address of the currently connected
station is used."""
if not isinstance(obj, FstDevice):
raise Exception("Peer must be a FstDevice object")
self.peer_obj = obj
self.set_old_peer_addr(old_peer_addr)
self.set_new_peer_addr(new_peer_addr)
def get_peer(self):
"""Returns peer object"""
return self.peer_obj
def set_fst_parameters(self, group_id=None, pri=None, llt=None):
"""Change/set new FST parameters. Can be used to start FST sessions with
different FST parameters than defined in the configuration file."""
if group_id is not None:
self.fst_group = group_id
if pri is not None:
self.fst_pri = pri
if llt is not None:
self.fst_llt = llt
def get_local_mbies(self, ifname=None):
if_name = ifname if ifname is not None else self.iface
return self.grequest("FST-MANAGER TEST_REQUEST GET_LOCAL_MBIES " + if_name)
def add_session(self):
"""Adds an FST session. add_peer() must be called calling this
function"""
if self.peer_obj is None:
raise Exception("Peer wasn't added before starting session")
self.dump_monitor()
grp = ' ' + self.fst_group if self.fst_group != '' else ''
sid = self.grequest("FST-MANAGER SESSION_ADD" + grp)
sid = sid.strip()
if sid.startswith("FAIL"):
raise Exception("Cannot add FST session with groupid ==" + grp)
self.dump_monitor()
return sid
def set_session_param(self, params):
request = "FST-MANAGER SESSION_SET"
if params is not None and params != '':
request = request + ' ' + params
return self.grequest(request)
def get_session_params(self, sid):
request = "FST-MANAGER SESSION_GET " + sid
res = self.grequest(request)
if res.startswith("FAIL"):
return None
params = {}
for i in res.splitlines():
p = i.split('=')
params[p[0]] = p[1]
return params
def iface_peers(self, ifname):
grp = self.fst_group if self.fst_group != '' else ''
res = self.grequest("FST-MANAGER IFACE_PEERS " + grp + ' ' + ifname)
if res.startswith("FAIL"):
return None
return res.splitlines()
def get_peer_mbies(self, ifname, peer_addr):
return self.grequest("FST-MANAGER GET_PEER_MBIES %s %s" % (ifname, peer_addr))
def list_ifaces(self):
grp = self.fst_group if self.fst_group != '' else ''
res = self.grequest("FST-MANAGER LIST_IFACES " + grp)
if res.startswith("FAIL"):
return None
ifaces = []
for i in res.splitlines():
p = i.split(':')
iface = {}
iface['name'] = p[0]
iface['priority'] = p[1]
iface['llt'] = p[2]
ifaces.append(iface)
return ifaces
def list_groups(self):
res = self.grequest("FST-MANAGER LIST_GROUPS")
if res.startswith("FAIL"):
return None
return res.splitlines()
def configure_session(self, sid, new_iface, old_iface=None):
"""Calls session_set for a number of parameters some of which are stored
in "self" while others are passed to this function explicitly. If
old_iface is None, current iface is used; if old_iface is an empty
string."""
self.dump_monitor()
oldiface = old_iface if old_iface is not None else self.iface
s = self.set_session_param(sid + ' old_ifname=' + oldiface)
if not s.startswith("OK"):
raise Exception("Cannot set FST session old_ifname: " + s)
if new_iface is not None:
s = self.set_session_param(sid + " new_ifname=" + new_iface)
if not s.startswith("OK"):
raise Exception("Cannot set FST session new_ifname:" + s)
if self.new_peer_addr is not None and self.new_peer_addr != '':
s = self.set_session_param(sid + " new_peer_addr=" + self.new_peer_addr)
if not s.startswith("OK"):
raise Exception("Cannot set FST session peer address:" + s + " (new)")
if self.old_peer_addr is not None and self.old_peer_addr != '':
s = self.set_session_param(sid + " old_peer_addr=" + self.old_peer_addr)
if not s.startswith("OK"):
raise Exception("Cannot set FST session peer address:" + s + " (old)")
if self.fst_llt is not None and self.fst_llt != '':
s = self.set_session_param(sid + " llt=" + self.fst_llt)
if not s.startswith("OK"):
raise Exception("Cannot set FST session llt:" + s)
self.dump_monitor()
def send_iface_attach_request(self, ifname, group, llt, priority):
request = "FST-ATTACH " + ifname + ' ' + group
if llt is not None:
request += " llt=" + llt
if priority is not None:
request += " priority=" + priority
res = self.grequest(request)
if not res.startswith("OK"):
raise Exception("Cannot attach FST iface: " + res)
def send_iface_detach_request(self, ifname):
res = self.grequest("FST-DETACH " + ifname)
if not res.startswith("OK"):
raise Exception("Cannot detach FST iface: " + res)
def send_session_setup_request(self, sid):
s = self.grequest("FST-MANAGER SESSION_INITIATE " + sid)
if not s.startswith('OK'):
raise Exception("Cannot send setup request: %s" % s)
return s
def send_session_setup_response(self, sid, response):
request = "FST-MANAGER SESSION_RESPOND " + sid + " " + response
s = self.grequest(request)
if not s.startswith('OK'):
raise Exception("Cannot send setup response: %s" % s)
return s
def send_test_session_setup_request(self, fsts_id,
additional_parameter=None):
request = "FST-MANAGER TEST_REQUEST SEND_SETUP_REQUEST " + fsts_id
if additional_parameter is not None:
request += " " + additional_parameter
s = self.grequest(request)
if not s.startswith('OK'):
raise Exception("Cannot send FST setup request: %s" % s)
return s
def send_test_session_setup_response(self, fsts_id,
response, additional_parameter=None):
request = "FST-MANAGER TEST_REQUEST SEND_SETUP_RESPONSE " + fsts_id + " " + response
if additional_parameter is not None:
request += " " + additional_parameter
s = self.grequest(request)
if not s.startswith('OK'):
raise Exception("Cannot send FST setup response: %s" % s)
return s
def send_test_ack_request(self, fsts_id):
s = self.grequest("FST-MANAGER TEST_REQUEST SEND_ACK_REQUEST " + fsts_id)
if not s.startswith('OK'):
raise Exception("Cannot send FST ack request: %s" % s)
return s
def send_test_ack_response(self, fsts_id):
s = self.grequest("FST-MANAGER TEST_REQUEST SEND_ACK_RESPONSE " + fsts_id)
if not s.startswith('OK'):
raise Exception("Cannot send FST ack response: %s" % s)
return s
def send_test_tear_down(self, fsts_id):
s = self.grequest("FST-MANAGER TEST_REQUEST SEND_TEAR_DOWN " + fsts_id)
if not s.startswith('OK'):
raise Exception("Cannot send FST tear down: %s" % s)
return s
def get_fsts_id_by_sid(self, sid):
s = self.grequest("FST-MANAGER TEST_REQUEST GET_FSTS_ID " + sid)
if s == ' ' or s.startswith('FAIL'):
raise Exception("Cannot get fsts_id for sid == %s" % sid)
return int(s)
def wait_for_iface_event(self, timeout):
while True:
ev = self.wait_gevent(["FST-EVENT-IFACE"], timeout)
if ev is None:
raise Exception("No FST-EVENT-IFACE received")
event = parse_fst_iface_event(ev)
if event is None:
# We can't parse so it's not our event, wait for next one
continue
return event
def wait_for_session_event(self, timeout, events_to_ignore=[],
events_to_count=[]):
while True:
ev = self.wait_gevent(["FST-EVENT-SESSION"], timeout)
if ev is None:
raise Exception("No FST-EVENT-SESSION received")
event = parse_fst_session_event(ev)
if event is None:
# We can't parse so it's not our event, wait for next one
continue
if len(events_to_ignore) > 0:
if event['type'] in events_to_ignore:
continue
elif len(events_to_count) > 0:
if event['type'] not in events_to_count:
continue
return event
def initiate_session(self, sid, response="accept"):
"""Initiates FST session with given session id 'sid'.
'response' is the session respond answer: "accept", "reject", or a
special "timeout" value to skip the response in order to test session
timeouts.
Returns: "OK" - session has been initiated, otherwise the reason for the
reset: REASON_REJECT, REASON_STT."""
strsid = ' ' + sid if sid != '' else ''
s = self.grequest("FST-MANAGER SESSION_INITIATE"+ strsid)
if not s.startswith('OK'):
raise Exception("Cannot initiate fst session: %s" % s)
ev = self.peer_obj.wait_gevent(["FST-EVENT-SESSION"], timeout=5)
if ev is None:
raise Exception("No FST-EVENT-SESSION received")
# We got FST event
event = parse_fst_session_event(ev)
if event == None:
raise Exception("Unrecognized FST event: " % ev)
if event['type'] != 'EVENT_FST_SETUP':
raise Exception("Expected FST_SETUP event, got: " + event['type'])
ev = self.peer_obj.wait_gevent(["FST-EVENT-SESSION"], timeout=5)
if ev is None:
raise Exception("No FST-EVENT-SESSION received")
event = parse_fst_session_event(ev)
if event == None:
raise Exception("Unrecognized FST event: " % ev)
if event['type'] != 'EVENT_FST_SESSION_STATE':
raise Exception("Expected EVENT_FST_SESSION_STATE event, got: " + event['type'])
if event['new_state'] != "SETUP_COMPLETION":
raise Exception("Expected new state SETUP_COMPLETION, got: " + event['new_state'])
if response == '':
return 'OK'
if response != "timeout":
s = self.peer_obj.grequest("FST-MANAGER SESSION_RESPOND "+ event['id'] + " " + response) # Or reject
if not s.startswith('OK'):
raise Exception("Error session_respond: %s" % s)
# Wait for EVENT_FST_SESSION_STATE events. We should get at least 2
# events. The 1st event will be EVENT_FST_SESSION_STATE
# old_state=INITIAL new_state=SETUP_COMPLETED. The 2nd event will be
# either EVENT_FST_ESTABLISHED with the session id or
# EVENT_FST_SESSION_STATE with new_state=INITIAL if the session was
# reset, the reason field will tell why.
result = ''
while result == '':
ev = self.wait_gevent(["FST-EVENT-SESSION"], timeout=5)
if ev is None:
break # No session event received
event = parse_fst_session_event(ev)
if event == None:
# We can't parse so it's not our event, wait for next one
continue
if event['type'] == 'EVENT_FST_ESTABLISHED':
result = "OK"
break
elif event['type'] == "EVENT_FST_SESSION_STATE":
if event['new_state'] == "INITIAL":
# Session was reset, the only reason to get back to initial
# state.
result = event['reason']
break
if result == '':
raise Exception("No event for session respond")
return result
def transfer_session(self, sid):
"""Transfers the session. 'sid' is the session id. 'hsta' is the
station-responder object.
Returns: REASON_SWITCH - the session has been transferred successfully
or a REASON_... reported by the reset event."""
request = "FST-MANAGER SESSION_TRANSFER"
self.dump_monitor()
if sid != '':
request += ' ' + sid
s = self.grequest(request)
if not s.startswith('OK'):
raise Exception("Cannot transfer fst session: %s" % s)
result = ''
while result == '':
ev = self.peer_obj.wait_gevent(["FST-EVENT-SESSION"], timeout=5)
if ev is None:
raise Exception("Missing session transfer event")
# We got FST event. We expect TRANSITION_CONFIRMED state and then
# INITIAL (reset) with the reason (e.g. "REASON_SWITCH").
# Right now we'll be waiting for the reset event and record the
# reason.
event = parse_fst_session_event(ev)
if event == None:
raise Exception("Unrecognized FST event: " % ev)
if event['new_state'] == 'INITIAL':
result = event['reason']
self.dump_monitor()
return result
def wait_for_tear_down(self):
ev = self.wait_gevent(["FST-EVENT-SESSION"], timeout=5)
if ev is None:
raise Exception("No FST-EVENT-SESSION received")
# We got FST event
event = parse_fst_session_event(ev)
if event == None:
raise Exception("Unrecognized FST event: " % ev)
if event['type'] != 'EVENT_FST_SESSION_STATE':
raise Exception("Expected EVENT_FST_SESSION_STATE event, got: " + event['type'])
if event['new_state'] != "INITIAL":
raise Exception("Expected new state INITIAL, got: " + event['new_state'])
if event['reason'] != 'REASON_TEARDOWN':
raise Exception("Expected reason REASON_TEARDOWN, got: " + event['reason'])
def teardown_session(self, sid):
"""Tears down FST session with a given session id ('sid')"""
strsid = ' ' + sid if sid != '' else ''
s = self.grequest("FST-MANAGER SESSION_TEARDOWN" + strsid)
if not s.startswith('OK'):
raise Exception("Cannot tear down fst session: %s" % s)
self.peer_obj.wait_for_tear_down()
def remove_session(self, sid, wait_for_tear_down=True):
"""Removes FST session with a given session id ('sid')"""
strsid = ' ' + sid if sid != '' else ''
s = self.grequest("FST-MANAGER SESSION_REMOVE" + strsid)
if not s.startswith('OK'):
raise Exception("Cannot remove fst session: %s" % s)
if wait_for_tear_down == True:
self.peer_obj.wait_for_tear_down()
def remove_all_sessions(self):
"""Removes FST session with a given session id ('sid')"""
grp = ' ' + self.fst_group if self.fst_group != '' else ''
s = self.grequest("FST-MANAGER LIST_SESSIONS" + grp)
if not s.startswith('FAIL'):
for sid in s.splitlines():
sid = sid.strip()
if len(sid) != 0:
self.remove_session(sid, wait_for_tear_down=False)
#
# FstAP class
#
class FstAP(FstDevice):
def __init__(self, iface, ssid, mode, chan, fst_group, fst_pri,
fst_llt=None, rsn=False):
"""If fst_group is empty, then FST parameters will not be set
If fst_llt is empty, the parameter will not be set and the default value
is expected to be configured."""
self.ssid = ssid
self.mode = mode
self.chan = chan
self.reg_ctrl = fst_test_common.HapdRegCtrl()
self.reg_ctrl.add_ap(iface, self.chan)
self.global_instance = hostapd.HostapdGlobal()
FstDevice.__init__(self, iface, fst_group, fst_pri, fst_llt, rsn)
def start(self, return_early=False):
"""Starts AP the "standard" way as it was intended by hostapd tests.
This will work only when FST supports fully dynamically loading
parameters in hostapd."""
params = {}
params['ssid'] = self.ssid
params['hw_mode'] = self.mode
params['channel'] = self.chan
params['country_code'] = 'US'
if self.rsn:
params['wpa'] = '2'
params['wpa_key_mgmt'] = 'WPA-PSK'
params['rsn_pairwise'] = 'CCMP'
params['wpa_passphrase'] = '12345678'
self.hapd = hostapd.add_ap(self.iface, params)
if not self.hapd.ping():
raise Exception("Could not ping FST hostapd")
self.reg_ctrl.start()
self.get_global_instance()
if return_early:
return self.hapd
if len(self.fst_group) != 0:
self.send_iface_attach_request(self.iface, self.fst_group,
self.fst_llt, self.fst_pri)
return self.hapd
def stop(self):
"""Removes the AP, To be used when dynamic fst APs are implemented in
hostapd."""
if len(self.fst_group) != 0:
self.remove_all_sessions()
try:
self.send_iface_detach_request(self.iface)
except Exception as e:
logger.info(str(e))
self.reg_ctrl.stop()
del self.global_instance
self.global_instance = None
def get_instance(self):
"""Return the Hostapd/WpaSupplicant instance"""
if self.instance is None:
self.instance = hostapd.Hostapd(self.iface)
return self.instance
def get_global_instance(self):
return self.global_instance
def get_own_mac_address(self):
"""Gets the device's own MAC address"""
h = self.get_instance()
status = h.get_status()
return status['bssid[0]']
def get_actual_peer_addr(self):
"""Gets the peer address. A connected station address is returned."""
# Use the device instance, the global control interface doesn't have
# station address
h = self.get_instance()
sta = h.get_sta(None)
if sta is None or 'addr' not in sta:
# Maybe station is not connected?
addr = None
else:
addr = sta['addr']
return addr
def grequest(self, req):
"""Send request on the global control interface"""
logger.debug("FstAP::grequest: " + req)
h = self.get_global_instance()
return h.request(req)
def wait_gevent(self, events, timeout=None):
"""Wait for a list of events on the global interface"""
h = self.get_global_instance()
if timeout is not None:
return h.wait_event(events, timeout=timeout)
else:
return h.wait_event(events)
def get_ssid(self):
return self.ssid
def dump_monitor(self):
"""Dump control interface monitor events"""
if self.instance:
self.instance.dump_monitor()
#
# FstSTA class
#
class FstSTA(FstDevice):
def __init__(self, iface, fst_group, fst_pri, fst_llt=None, rsn=False):
"""If fst_group is empty, then FST parameters will not be set
If fst_llt is empty, the parameter will not be set and the default value
is expected to be configured."""
FstDevice.__init__(self, iface, fst_group, fst_pri, fst_llt, rsn)
self.connected = None # FstAP object the station is connected to
def start(self):
"""Current implementation involves running another instance of
wpa_supplicant with fixed FST STAs configurations. When any type of
dynamic STA loading is implemented, rewrite the function similarly to
FstAP."""
h = self.get_instance()
h.interface_add(self.iface, drv_params="force_connect_cmd=1")
if not h.global_ping():
raise Exception("Could not ping FST wpa_supplicant")
if len(self.fst_group) != 0:
self.send_iface_attach_request(self.iface, self.fst_group,
self.fst_llt, self.fst_pri)
return None
def stop(self):
"""Removes the STA. In a static (temporary) implementation does nothing,
the STA will be removed when the fst wpa_supplicant process is killed by
fstap.cleanup()."""
h = self.get_instance()
h.dump_monitor()
if len(self.fst_group) != 0:
self.remove_all_sessions()
self.send_iface_detach_request(self.iface)
h.dump_monitor()
h.interface_remove(self.iface)
h.close_ctrl()
del h
self.instance = None
def get_instance(self):
"""Return the Hostapd/WpaSupplicant instance"""
if self.instance is None:
self.instance = WpaSupplicant(global_iface='/tmp/wpas-wlan5')
return self.instance
def get_own_mac_address(self):
"""Gets the device's own MAC address"""
h = self.get_instance()
status = h.get_status()
return status['address']
def get_actual_peer_addr(self):
"""Gets the peer address. A connected station address is returned"""
h = self.get_instance()
status = h.get_status()
return status['bssid']
def grequest(self, req):
"""Send request on the global control interface"""
logger.debug("FstSTA::grequest: " + req)
h = self.get_instance()
return h.global_request(req)
def wait_gevent(self, events, timeout=None):
"""Wait for a list of events on the global interface"""
h = self.get_instance()
if timeout is not None:
return h.wait_global_event(events, timeout=timeout)
else:
return h.wait_global_event(events)
def scan(self, freq=None, no_wait=False, only_new=False):
"""Issue Scan with given parameters. Returns the BSS dictionary for the
AP found (the 1st BSS found. TODO: What if the AP required is not the
1st in list?) or None if no BSS found. None call be also a result of
no_wait=True. Note, request("SCAN_RESULTS") can be used to get all the
results at once."""
h = self.get_instance()
h.dump_monitor()
h.scan(None, freq, no_wait, only_new)
r = h.get_bss('0')
h.dump_monitor()
return r
def connect(self, ap, **kwargs):
"""Connects to the given AP"""
if not isinstance(ap, FstAP):
raise Exception("Bad AP object to connect to")
h = self.get_instance()
hap = ap.get_instance()
h.dump_monitor()
h.connect(ap.get_ssid(), **kwargs)
h.dump_monitor()
self.connected = ap
def connect_to_external_ap(self, ap, ssid, check_connection=True, **kwargs):
"""Connects to the given external AP"""
if not isinstance(ap, hostapd.Hostapd):
raise Exception("Bad AP object to connect to")
h = self.get_instance()
h.dump_monitor()
h.connect(ssid, **kwargs)
self.connected = ap
if check_connection:
ev = ap.wait_event(["AP-STA-CONNECTED"], timeout=10)
if ev is None:
self.connected = None
raise Exception("No connection event received from %s" % ssid)
h.dump_monitor()
def disconnect(self, check_disconnect=True):
"""Disconnects from the AP the station is currently connected to"""
if self.connected is not None:
h = self.get_instance()
h.dump_monitor()
h.request("DISCONNECT")
if check_disconnect:
hap = self.connected.get_instance()
ev = hap.wait_event(["AP-STA-DISCONNECTED"], timeout=10)
if ev is None:
raise Exception("No disconnection event received from %s" % self.connected.get_ssid())
h.dump_monitor()
self.connected = None
def disconnect_from_external_ap(self, check_disconnect=True):
"""Disconnects from the external AP the station is currently connected
to"""
if self.connected is not None:
h = self.get_instance()
h.dump_monitor()
h.request("DISCONNECT")
if check_disconnect:
hap = self.connected
ev = hap.wait_event(["AP-STA-DISCONNECTED"], timeout=10)
if ev is None:
raise Exception("No disconnection event received from AP")
h.dump_monitor()
self.connected = None
def dump_monitor(self):
"""Dump control interface monitor events"""
if self.instance:
self.instance.dump_monitor()