esp-idf/tools/ci/python_packages/wifi_tools.py

132 lines
4.6 KiB
Python

# Copyright 2018 Espressif Systems (Shanghai) PTE LTD
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
import time
import dbus
import dbus.mainloop.glib
import netifaces
def get_wiface_name():
for iface in netifaces.interfaces():
if iface.startswith('w'):
return iface
return None
def get_wiface_IPv4(iface):
try:
[info] = netifaces.ifaddresses(iface)[netifaces.AF_INET]
return info['addr']
except KeyError:
return None
class wpa_cli:
def __init__(self, iface, reset_on_exit=False):
self.iface_name = iface
self.iface_obj = None
self.iface_ifc = None
self.old_network = None
self.new_network = None
self.connected = False
self.reset_on_exit = reset_on_exit
try:
dbus.mainloop.glib.DBusGMainLoop(set_as_default=True)
bus = dbus.SystemBus()
service = dbus.Interface(bus.get_object('fi.w1.wpa_supplicant1', '/fi/w1/wpa_supplicant1'),
'fi.w1.wpa_supplicant1')
iface_path = service.GetInterface(self.iface_name)
self.iface_obj = bus.get_object('fi.w1.wpa_supplicant1', iface_path)
self.iface_ifc = dbus.Interface(self.iface_obj, 'fi.w1.wpa_supplicant1.Interface')
self.iface_props = dbus.Interface(self.iface_obj, 'org.freedesktop.DBus.Properties')
if self.iface_ifc is None:
raise RuntimeError('supplicant : Failed to fetch interface')
self.old_network = self._get_iface_property('CurrentNetwork')
print('Old network is %s' % self.old_network)
if self.old_network == '/':
self.old_network = None
else:
self.connected = True
except Exception as err:
raise Exception('Failure in wpa_cli init: {}'.format(err))
def _get_iface_property(self, name):
""" Read the property with 'name' from the wi-fi interface object
Note: The result is a dbus wrapped type, so should usually convert it to the corresponding native
Python type
"""
return self.iface_props.Get('fi.w1.wpa_supplicant1.Interface', name)
def connect(self, ssid, password):
try:
if self.connected is True:
self.iface_ifc.Disconnect()
self.connected = False
if self.new_network is not None:
self.iface_ifc.RemoveNetwork(self.new_network)
print('Pre-connect state is %s, IP is %s' % (self._get_iface_property('State'), get_wiface_IPv4(self.iface_name)))
self.new_network = self.iface_ifc.AddNetwork({'ssid': ssid, 'psk': password})
self.iface_ifc.SelectNetwork(self.new_network)
time.sleep(10)
ip = None
retry = 10
while retry > 0:
time.sleep(5)
state = str(self._get_iface_property('State'))
print('wpa iface state %s (scanning %s)' % (state, bool(self._get_iface_property('Scanning'))))
if state in ['disconnected', 'inactive']:
self.iface_ifc.Reconnect()
ip = get_wiface_IPv4(self.iface_name)
print('wpa iface %s IP %s' % (self.iface_name, ip))
if ip is not None:
self.connected = True
return ip
retry -= 1
time.sleep(3)
self.reset()
print('wpa_cli : Connection failed')
except Exception as err:
raise Exception('Failure in wpa_cli init: {}'.format(err))
def reset(self):
if self.iface_ifc is not None:
if self.connected is True:
self.iface_ifc.Disconnect()
self.connected = False
if self.new_network is not None:
self.iface_ifc.RemoveNetwork(self.new_network)
self.new_network = None
if self.old_network is not None:
self.iface_ifc.SelectNetwork(self.old_network)
self.old_network = None
def __del__(self):
if self.reset_on_exit is True:
self.reset()